Implements low-level communication layer over I2C and Aux lines using
GPIO handles.
Signed-off-by: Harry Wentland <harry.wentland at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/dal/dc/i2caux/Makefile | 33 +
drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.c | 567 ++++++++++++
drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.h | 119 +++
.../amd/dal/dc/i2caux/dce110/aux_engine_dce110.c | 788 +++++++++++++++++
.../amd/dal/dc/i2caux/dce110/aux_engine_dce110.h | 56 ++
.../i2caux/dce110/i2c_generic_hw_engine_dce110.h | 25 +
.../dal/dc/i2caux/dce110/i2c_hw_engine_dce110.c | 954 +++++++++++++++++++++
.../dal/dc/i2caux/dce110/i2c_hw_engine_dce110.h | 58 ++
.../dal/dc/i2caux/dce110/i2c_sw_engine_dce110.c | 172 ++++
.../dal/dc/i2caux/dce110/i2c_sw_engine_dce110.h | 43 +
.../drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.c | 266 ++++++
.../drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.h | 39 +
.../amd/dal/dc/i2caux/diagnostics/i2caux_diag.c | 112 +++
.../amd/dal/dc/i2caux/diagnostics/i2caux_diag.h | 33 +
drivers/gpu/drm/amd/dal/dc/i2caux/engine.h | 129 +++
drivers/gpu/drm/amd/dal/dc/i2caux/engine_base.c | 67 ++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.c | 121 +++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.h | 113 +++
.../drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.c | 286 ++++++
.../drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.h | 77 ++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.c | 246 ++++++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.h | 80 ++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.c | 614 +++++++++++++
drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.h | 81 ++
drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.c | 529 ++++++++++++
drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.h | 123 +++
26 files changed, 5731 insertions(+)
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/Makefile
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.h
create mode 100644
drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_generic_hw_engine_dce110.h
create mode 100644
drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.c
create mode 100644
drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.h
create mode 100644
drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.c
create mode 100644
drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/engine_base.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.h
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.c
create mode 100644 drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.h
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/Makefile
b/drivers/gpu/drm/amd/dal/dc/i2caux/Makefile
new file mode 100644
index 000000000000..390d83d649f5
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/Makefile
@@ -0,0 +1,33 @@
+#
+# Makefile for the 'i2c' sub-component of DAL.
+# It provides the control and status of HW i2c engine of the adapter.
+
+I2CAUX = aux_engine.o engine_base.o i2caux.o i2c_engine.o \
+ i2c_generic_hw_engine.o i2c_hw_engine.o i2c_sw_engine.o
+
+AMD_DAL_I2CAUX = $(addprefix $(AMDDALPATH)/dc/i2caux/,$(I2CAUX))
+
+AMD_DAL_FILES += $(AMD_DAL_I2CAUX)
+
+
+###############################################################################
+# DCE 11x family
+###############################################################################
+ifdef CONFIG_DRM_AMD_DAL_DCE11_0
+I2CAUX_DCE110 = i2caux_dce110.o i2c_sw_engine_dce110.o i2c_hw_engine_dce110.o \
+ aux_engine_dce110.o
+
+AMD_DAL_I2CAUX_DCE110 = $(addprefix
$(AMDDALPATH)/dc/i2caux/dce110/,$(I2CAUX_DCE110))
+
+AMD_DAL_FILES += $(AMD_DAL_I2CAUX_DCE110)
+endif
+
+###############################################################################
+# Diagnostics on FPGA
+###############################################################################
+I2CAUX_DIAG = i2caux_diag.o
+
+AMD_DAL_I2CAUX_DIAG = $(addprefix
$(AMDDALPATH)/dc/i2caux/diagnostics/,$(I2CAUX_DIAG))
+
+AMD_DAL_FILES += $(AMD_DAL_I2CAUX_DIAG)
+
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.c
new file mode 100644
index 000000000000..7042d10ee7dc
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.c
@@ -0,0 +1,567 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "aux_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "include/link_service_types.h"
+
+/*
+ * This unit
+ */
+
+enum {
+ AUX_INVALID_REPLY_RETRY_COUNTER = 1,
+ AUX_TIMED_OUT_RETRY_COUNTER = 2,
+ AUX_DEFER_RETRY_COUNTER = 6
+};
+
+#define FROM_ENGINE(ptr) \
+ container_of((ptr), struct aux_engine, base)
+
+enum i2caux_engine_type dal_aux_engine_get_engine_type(
+ const struct engine *engine)
+{
+ return I2CAUX_ENGINE_TYPE_AUX;
+}
+
+bool dal_aux_engine_acquire(
+ struct engine *engine,
+ struct ddc *ddc)
+{
+ struct aux_engine *aux_engine = FROM_ENGINE(engine);
+
+ enum gpio_result result;
+
+ result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
+ GPIO_DDC_CONFIG_TYPE_MODE_AUX);
+
+ if (result != GPIO_RESULT_OK)
+ return false;
+
+ if (!aux_engine->funcs->acquire_engine(aux_engine)) {
+ dal_ddc_close(ddc);
+ return false;
+ }
+
+ engine->ddc = ddc;
+
+ return true;
+}
+
+struct read_command_context {
+ uint8_t *buffer;
+ uint8_t current_read_length;
+ uint32_t offset;
+ enum i2caux_transaction_status status;
+
+ struct aux_request_transaction_data request;
+ struct aux_reply_transaction_data reply;
+
+ uint8_t returned_byte;
+
+ uint32_t timed_out_retry_aux;
+ uint32_t invalid_reply_retry_aux;
+ uint32_t defer_retry_aux;
+ uint32_t defer_retry_i2c;
+ uint32_t invalid_reply_retry_aux_on_ack;
+
+ bool transaction_complete;
+ bool operation_succeeded;
+};
+
+static void process_read_reply(
+ struct aux_engine *engine,
+ struct read_command_context *ctx)
+{
+ engine->funcs->process_channel_reply(engine, &ctx->reply);
+
+ switch (ctx->reply.status) {
+ case AUX_TRANSACTION_REPLY_AUX_ACK:
+ ctx->defer_retry_aux = 0;
+ if (ctx->returned_byte > ctx->current_read_length) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+ ctx->operation_succeeded = false;
+ } else if (ctx->returned_byte < ctx->current_read_length) {
+ ctx->current_read_length -= ctx->returned_byte;
+
+ ctx->offset += ctx->returned_byte;
+
+ ++ctx->invalid_reply_retry_aux_on_ack;
+
+ if (ctx->invalid_reply_retry_aux_on_ack >
+ AUX_INVALID_REPLY_RETRY_COUNTER) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+ ctx->operation_succeeded = false;
+ }
+ } else {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+ ctx->transaction_complete = true;
+ ctx->operation_succeeded = true;
+ }
+ break;
+ case AUX_TRANSACTION_REPLY_AUX_NACK:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+ ctx->operation_succeeded = false;
+ break;
+ case AUX_TRANSACTION_REPLY_AUX_DEFER:
+ ++ctx->defer_retry_aux;
+
+ if (ctx->defer_retry_aux > AUX_DEFER_RETRY_COUNTER) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ }
+ break;
+ case AUX_TRANSACTION_REPLY_I2C_DEFER:
+ ctx->defer_retry_aux = 0;
+
+ ++ctx->defer_retry_i2c;
+
+ if (ctx->defer_retry_i2c > AUX_DEFER_RETRY_COUNTER) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ }
+ break;
+ default:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+ ctx->operation_succeeded = false;
+ }
+}
+
+static void process_read_request(
+ struct aux_engine *engine,
+ struct read_command_context *ctx)
+{
+ enum aux_channel_operation_result operation_result;
+
+ engine->funcs->submit_channel_request(engine, &ctx->request);
+
+ operation_result = engine->funcs->get_channel_status(
+ engine, &ctx->returned_byte);
+
+ switch (operation_result) {
+ case AUX_CHANNEL_OPERATION_SUCCEEDED:
+ if (ctx->returned_byte > ctx->current_read_length) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+ ctx->operation_succeeded = false;
+ } else {
+ ctx->timed_out_retry_aux = 0;
+ ctx->invalid_reply_retry_aux = 0;
+
+ ctx->reply.length = ctx->returned_byte;
+ ctx->reply.data = ctx->buffer;
+
+ process_read_reply(engine, ctx);
+ }
+ break;
+ case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+ ++ctx->invalid_reply_retry_aux;
+
+ if (ctx->invalid_reply_retry_aux >
+ AUX_INVALID_REPLY_RETRY_COUNTER) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+ ctx->operation_succeeded = false;
+ } else
+ dm_delay_in_microseconds(engine->base.ctx, 400);
+ break;
+ case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
+ ++ctx->timed_out_retry_aux;
+
+ if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ } else {
+ /* DP 1.2a, table 2-58:
+ * "S3: AUX Request CMD PENDING:
+ * retry 3 times, with 400usec wait on each"
+ * The HW timeout is set to 550usec,
+ * so we should not wait here */
+ }
+ break;
+ default:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+ ctx->operation_succeeded = false;
+ }
+}
+
+static bool read_command(
+ struct aux_engine *engine,
+ struct i2caux_transaction_request *request,
+ bool middle_of_transaction)
+{
+ struct read_command_context ctx;
+
+ ctx.buffer = request->payload.data;
+ ctx.current_read_length = request->payload.length;
+ ctx.offset = 0;
+ ctx.timed_out_retry_aux = 0;
+ ctx.invalid_reply_retry_aux = 0;
+ ctx.defer_retry_aux = 0;
+ ctx.defer_retry_i2c = 0;
+ ctx.invalid_reply_retry_aux_on_ack = 0;
+ ctx.transaction_complete = false;
+ ctx.operation_succeeded = true;
+
+ if (request->payload.address_space ==
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+ ctx.request.type = AUX_TRANSACTION_TYPE_DP;
+ ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_READ;
+ ctx.request.address = request->payload.address;
+ } else if (request->payload.address_space ==
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
+ ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
+ ctx.request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_READ;
+ ctx.request.address = request->payload.address >> 1;
+ } else {
+ /* in DAL2, there was no return in such case */
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ ctx.request.delay = 0;
+
+ do {
+ dm_memset(ctx.buffer + ctx.offset, 0, ctx.current_read_length);
+
+ ctx.request.data = ctx.buffer + ctx.offset;
+ ctx.request.length = ctx.current_read_length;
+
+ process_read_request(engine, &ctx);
+
+ request->status = ctx.status;
+
+ if (ctx.operation_succeeded && !ctx.transaction_complete)
+ if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
+ dm_sleep_in_milliseconds(engine->base.ctx,
engine->delay);
+ } while (ctx.operation_succeeded && !ctx.transaction_complete);
+
+ return ctx.operation_succeeded;
+}
+
+struct write_command_context {
+ bool mot;
+
+ uint8_t *buffer;
+ uint8_t current_write_length;
+ enum i2caux_transaction_status status;
+
+ struct aux_request_transaction_data request;
+ struct aux_reply_transaction_data reply;
+
+ uint8_t returned_byte;
+
+ uint32_t timed_out_retry_aux;
+ uint32_t invalid_reply_retry_aux;
+ uint32_t defer_retry_aux;
+ uint32_t defer_retry_i2c;
+ uint32_t max_defer_retry;
+ uint32_t ack_m_retry;
+
+ uint8_t reply_data[DEFAULT_AUX_MAX_DATA_SIZE];
+
+ bool transaction_complete;
+ bool operation_succeeded;
+};
+
+static void process_write_reply(
+ struct aux_engine *engine,
+ struct write_command_context *ctx)
+{
+ engine->funcs->process_channel_reply(engine, &ctx->reply);
+
+ switch (ctx->reply.status) {
+ case AUX_TRANSACTION_REPLY_AUX_ACK:
+ ctx->operation_succeeded = true;
+
+ if (ctx->returned_byte) {
+ ctx->request.action = ctx->mot ?
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
+
+ ctx->current_write_length = 0;
+
+ ++ctx->ack_m_retry;
+
+ if (ctx->ack_m_retry > AUX_DEFER_RETRY_COUNTER) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ } else
+ dm_delay_in_microseconds(engine->base.ctx, 300);
+ } else {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+ ctx->defer_retry_aux = 0;
+ ctx->ack_m_retry = 0;
+ ctx->transaction_complete = true;
+ }
+ break;
+ case AUX_TRANSACTION_REPLY_AUX_NACK:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+ ctx->operation_succeeded = false;
+ break;
+ case AUX_TRANSACTION_REPLY_AUX_DEFER:
+ ++ctx->defer_retry_aux;
+
+ if (ctx->defer_retry_aux > ctx->max_defer_retry) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ }
+ break;
+ case AUX_TRANSACTION_REPLY_I2C_DEFER:
+ ctx->defer_retry_aux = 0;
+ ctx->current_write_length = 0;
+
+ ctx->request.action = ctx->mot ?
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST;
+
+ ++ctx->defer_retry_i2c;
+
+ if (ctx->defer_retry_i2c > ctx->max_defer_retry) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ }
+ break;
+ default:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+ ctx->operation_succeeded = false;
+ }
+}
+
+static void process_write_request(
+ struct aux_engine *engine,
+ struct write_command_context *ctx)
+{
+ enum aux_channel_operation_result operation_result;
+
+ engine->funcs->submit_channel_request(engine, &ctx->request);
+
+ operation_result = engine->funcs->get_channel_status(
+ engine, &ctx->returned_byte);
+
+ switch (operation_result) {
+ case AUX_CHANNEL_OPERATION_SUCCEEDED:
+ ctx->timed_out_retry_aux = 0;
+ ctx->invalid_reply_retry_aux = 0;
+
+ ctx->reply.length = ctx->returned_byte;
+ ctx->reply.data = ctx->reply_data;
+
+ process_write_reply(engine, ctx);
+ break;
+ case AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY:
+ ++ctx->invalid_reply_retry_aux;
+
+ if (ctx->invalid_reply_retry_aux >
+ AUX_INVALID_REPLY_RETRY_COUNTER) {
+ ctx->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR;
+ ctx->operation_succeeded = false;
+ } else
+ dm_delay_in_microseconds(engine->base.ctx, 400);
+ break;
+ case AUX_CHANNEL_OPERATION_FAILED_TIMEOUT:
+ ++ctx->timed_out_retry_aux;
+
+ if (ctx->timed_out_retry_aux > AUX_TIMED_OUT_RETRY_COUNTER) {
+ ctx->status = I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ ctx->operation_succeeded = false;
+ } else {
+ /* DP 1.2a, table 2-58:
+ * "S3: AUX Request CMD PENDING:
+ * retry 3 times, with 400usec wait on each"
+ * The HW timeout is set to 550usec,
+ * so we should not wait here */
+ }
+ break;
+ default:
+ ctx->status = I2CAUX_TRANSACTION_STATUS_UNKNOWN;
+ ctx->operation_succeeded = false;
+ }
+}
+
+static bool write_command(
+ struct aux_engine *engine,
+ struct i2caux_transaction_request *request,
+ bool middle_of_transaction)
+{
+ struct write_command_context ctx;
+
+ ctx.mot = middle_of_transaction;
+ ctx.buffer = request->payload.data;
+ ctx.current_write_length = request->payload.length;
+ ctx.timed_out_retry_aux = 0;
+ ctx.invalid_reply_retry_aux = 0;
+ ctx.defer_retry_aux = 0;
+ ctx.defer_retry_i2c = 0;
+ ctx.ack_m_retry = 0;
+ ctx.transaction_complete = false;
+ ctx.operation_succeeded = true;
+
+ if (request->payload.address_space ==
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
+ ctx.request.type = AUX_TRANSACTION_TYPE_DP;
+ ctx.request.action = I2CAUX_TRANSACTION_ACTION_DP_WRITE;
+ ctx.request.address = request->payload.address;
+ } else if (request->payload.address_space ==
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C) {
+ ctx.request.type = AUX_TRANSACTION_TYPE_I2C;
+ ctx.request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+ ctx.request.address = request->payload.address >> 1;
+ } else {
+ /* in DAL2, there was no return in such case */
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ ctx.request.delay = 0;
+
+ ctx.max_defer_retry =
+ (engine->max_defer_write_retry > AUX_DEFER_RETRY_COUNTER) ?
+ engine->max_defer_write_retry : AUX_DEFER_RETRY_COUNTER;
+
+ do {
+ ctx.request.data = ctx.buffer;
+ ctx.request.length = ctx.current_write_length;
+
+ process_write_request(engine, &ctx);
+
+ request->status = ctx.status;
+
+ if (ctx.operation_succeeded && !ctx.transaction_complete)
+ if (ctx.request.type == AUX_TRANSACTION_TYPE_I2C)
+ dm_sleep_in_milliseconds(engine->base.ctx,
engine->delay);
+ } while (ctx.operation_succeeded && !ctx.transaction_complete);
+
+ return ctx.operation_succeeded;
+}
+
+static bool end_of_transaction_command(
+ struct aux_engine *engine,
+ struct i2caux_transaction_request *request)
+{
+ struct i2caux_transaction_request dummy_request;
+ uint8_t dummy_data;
+
+ /* [tcheng] We only need to send the stop (read with MOT = 0)
+ * for I2C-over-Aux, not native AUX */
+
+ if (request->payload.address_space !=
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C)
+ return false;
+
+ dummy_request.operation = request->operation;
+ dummy_request.payload.address_space = request->payload.address_space;
+ dummy_request.payload.address = request->payload.address;
+
+ /*
+ * Add a dummy byte due to some receiver quirk
+ * where one byte is sent along with MOT = 0.
+ * Ideally this should be 0.
+ */
+
+ dummy_request.payload.length = 0;
+ dummy_request.payload.data = &dummy_data;
+
+ if (request->operation == I2CAUX_TRANSACTION_READ)
+ return read_command(engine, &dummy_request, false);
+ else
+ return write_command(engine, &dummy_request, false);
+
+ /* according Syed, it does not need now DoDummyMOT */
+}
+
+bool dal_aux_engine_submit_request(
+ struct engine *engine,
+ struct i2caux_transaction_request *request,
+ bool middle_of_transaction)
+{
+ struct aux_engine *aux_engine = FROM_ENGINE(engine);
+
+ bool result;
+ bool mot_used = true;
+
+ switch (request->operation) {
+ case I2CAUX_TRANSACTION_READ:
+ result = read_command(aux_engine, request, mot_used);
+ break;
+ case I2CAUX_TRANSACTION_WRITE:
+ result = write_command(aux_engine, request, mot_used);
+ break;
+ default:
+ result = false;
+ }
+
+ /* [tcheng]
+ * need to send stop for the last transaction to free up the AUX
+ * if the above command fails, this would be the last transaction */
+
+ if (!middle_of_transaction || !result)
+ end_of_transaction_command(aux_engine, request);
+
+ /* mask AUX interrupt */
+
+ return result;
+}
+
+bool dal_aux_engine_construct(
+ struct aux_engine *engine,
+ struct dc_context *ctx)
+{
+ if (!dal_i2caux_construct_engine(&engine->base, ctx))
+ return false;
+ engine->delay = 0;
+ engine->max_defer_write_retry = 0;
+ return true;
+}
+
+void dal_aux_engine_destruct(
+ struct aux_engine *engine)
+{
+ dal_i2caux_destruct_engine(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.h
new file mode 100644
index 000000000000..474f5e911f49
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/aux_engine.h
@@ -0,0 +1,119 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_AUX_ENGINE_H__
+#define __DAL_AUX_ENGINE_H__
+
+enum aux_transaction_type {
+ AUX_TRANSACTION_TYPE_DP,
+ AUX_TRANSACTION_TYPE_I2C
+};
+
+struct aux_request_transaction_data {
+ enum aux_transaction_type type;
+ enum i2caux_transaction_action action;
+ /* 20-bit AUX channel transaction address */
+ uint32_t address;
+ /* delay, in 100-microsecond units */
+ uint8_t delay;
+ uint8_t length;
+ uint8_t *data;
+};
+
+enum aux_transaction_reply {
+ AUX_TRANSACTION_REPLY_AUX_ACK = 0x00,
+ AUX_TRANSACTION_REPLY_AUX_NACK = 0x01,
+ AUX_TRANSACTION_REPLY_AUX_DEFER = 0x02,
+
+ AUX_TRANSACTION_REPLY_I2C_ACK = 0x00,
+ AUX_TRANSACTION_REPLY_I2C_NACK = 0x10,
+ AUX_TRANSACTION_REPLY_I2C_DEFER = 0x20,
+
+ AUX_TRANSACTION_REPLY_INVALID = 0xFF
+};
+
+struct aux_reply_transaction_data {
+ enum aux_transaction_reply status;
+ uint8_t length;
+ uint8_t *data;
+};
+
+enum aux_channel_operation_result {
+ AUX_CHANNEL_OPERATION_SUCCEEDED,
+ AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN,
+ AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY,
+ AUX_CHANNEL_OPERATION_FAILED_TIMEOUT
+};
+
+struct aux_engine;
+
+struct aux_engine_funcs {
+ void (*destroy)(
+ struct aux_engine **ptr);
+ bool (*acquire_engine)(
+ struct aux_engine *engine);
+ void (*configure)(
+ struct aux_engine *engine,
+ union aux_config cfg);
+ bool (*start_gtc_sync)(
+ struct aux_engine *engine);
+ void (*stop_gtc_sync)(
+ struct aux_engine *engine);
+ void (*submit_channel_request)(
+ struct aux_engine *engine,
+ struct aux_request_transaction_data *request);
+ void (*process_channel_reply)(
+ struct aux_engine *engine,
+ struct aux_reply_transaction_data *reply);
+ enum aux_channel_operation_result (*get_channel_status)(
+ struct aux_engine *engine,
+ uint8_t *returned_bytes);
+};
+
+struct aux_engine {
+ struct engine base;
+ const struct aux_engine_funcs *funcs;
+ /* following values are expressed in milliseconds */
+ uint32_t delay;
+ uint32_t max_defer_write_retry;
+};
+
+bool dal_aux_engine_construct(
+ struct aux_engine *engine,
+ struct dc_context *ctx);
+
+void dal_aux_engine_destruct(
+ struct aux_engine *engine);
+bool dal_aux_engine_submit_request(
+ struct engine *ptr,
+ struct i2caux_transaction_request *request,
+ bool middle_of_transaction);
+bool dal_aux_engine_acquire(
+ struct engine *ptr,
+ struct ddc *ddc);
+enum i2caux_engine_type dal_aux_engine_get_engine_type(
+ const struct engine *engine);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.c
new file mode 100644
index 000000000000..f9c55435b5a0
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.c
@@ -0,0 +1,788 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../aux_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "aux_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+#include "dce/dce_11_0_d.h"
+#include "dce/dce_11_0_sh_mask.h"
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct aux_engine *'
+ * to 'struct aux_engine_dce110 *'
+ */
+#define FROM_AUX_ENGINE(ptr) \
+ container_of((ptr), struct aux_engine_dce110, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct aux_engine_dce110 *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_AUX_ENGINE(container_of((ptr), struct aux_engine, base))
+
+static void release_engine(
+ struct engine *engine)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_ENGINE(engine);
+
+ const uint32_t addr = aux_engine->addr.aux_arb_control;
+
+ uint32_t value = dm_read_reg(engine->ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_ARB_CONTROL,
+ AUX_SW_DONE_USING_AUX_REG);
+
+ dm_write_reg(engine->ctx, addr, value);
+}
+
+static void destruct(
+ struct aux_engine_dce110 *engine);
+
+static void destroy(
+ struct aux_engine **aux_engine)
+{
+ struct aux_engine_dce110 *engine = FROM_AUX_ENGINE(*aux_engine);
+
+ destruct(engine);
+
+ dm_free((*aux_engine)->base.ctx, engine);
+
+ *aux_engine = NULL;
+}
+
+#define SW_CAN_ACCESS_AUX 1
+
+static bool acquire_engine(
+ struct aux_engine *engine)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+ uint32_t value;
+ uint32_t field;
+
+ /* enable AUX before request SW to access AUX */
+ {
+ const uint32_t addr = aux_engine->addr.aux_control;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ field = get_reg_field_value(
+ value,
+ AUX_CONTROL,
+ AUX_EN);
+
+ if (field == 0) {
+ uint8_t counter = 0;
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_CONTROL,
+ AUX_EN);
+
+ /*DP_AUX block as part of the enable sequence*/
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_CONTROL,
+ AUX_RESET);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ /*poll HW to make sure reset it done*/
+ do {
+ dm_delay_in_microseconds(engine->base.ctx, 1);
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ field = get_reg_field_value(
+ value,
+ AUX_CONTROL,
+ AUX_RESET_DONE);
+
+ counter++;
+
+ } while ((field == 0) && (counter < 11));
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUX_CONTROL,
+ AUX_RESET);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ counter = 0;
+
+ do {
+ dm_delay_in_microseconds(engine->base.ctx, 1);
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ field = get_reg_field_value(
+ value,
+ AUX_CONTROL,
+ AUX_RESET_DONE);
+
+ counter++;
+
+ } while ((field == 1) && (counter < 11));
+ } /*if (field)*/
+ }
+
+ /* request SW to access AUX */
+ {
+ const uint32_t addr = aux_engine->addr.aux_arb_control;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_ARB_CONTROL,
+ AUX_SW_USE_AUX_REG_REQ);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ field = get_reg_field_value(
+ value,
+ AUX_ARB_CONTROL,
+ AUX_REG_RW_CNTL_STATUS);
+
+ return field == SW_CAN_ACCESS_AUX;
+ }
+}
+
+static void configure(
+ struct aux_engine *engine,
+ union aux_config cfg)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+ const uint32_t addr = aux_engine->addr.aux_control;
+
+ uint32_t value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ (0 != cfg.bits.ALLOW_AUX_WHEN_HPD_LOW),
+ AUX_CONTROL,
+ AUX_IGNORE_HPD_DISCON);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+}
+
+static bool start_gtc_sync(
+ struct aux_engine *engine)
+{
+ /*TODO*/
+ return false;
+}
+
+static void stop_gtc_sync(
+ struct aux_engine *engine)
+{
+ /*TODO*/
+}
+
+#define COMPOSE_AUX_SW_DATA_16_20(command, address) \
+ ((command) | ((0xF0000 & (address)) >> 16))
+
+#define COMPOSE_AUX_SW_DATA_8_15(address) \
+ ((0xFF00 & (address)) >> 8)
+
+#define COMPOSE_AUX_SW_DATA_0_7(address) \
+ (0xFF & (address))
+
+static void submit_channel_request(
+ struct aux_engine *engine,
+ struct aux_request_transaction_data *request)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+ uint32_t value;
+ uint32_t length;
+
+ bool is_write =
+ ((request->type == AUX_TRANSACTION_TYPE_DP) &&
+ (request->action == I2CAUX_TRANSACTION_ACTION_DP_WRITE)) ||
+ ((request->type == AUX_TRANSACTION_TYPE_I2C) &&
+ ((request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+ (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT)));
+
+ /* clear_aux_error */
+ {
+ const uint32_t addr = mmAUXN_IMPCAL;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUXN_IMPCAL,
+ AUXN_CALOUT_ERROR_AK);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUXN_IMPCAL,
+ AUXN_CALOUT_ERROR_AK);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+ {
+ const uint32_t addr = mmAUXP_IMPCAL;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUXP_IMPCAL,
+ AUXP_CALOUT_ERROR_AK);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUXP_IMPCAL,
+ AUXP_CALOUT_ERROR_AK);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+
+ /* force_default_calibrate */
+ {
+ const uint32_t addr = mmAUXN_IMPCAL;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUXN_IMPCAL,
+ AUXN_IMPCAL_ENABLE);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUXN_IMPCAL,
+ AUXN_IMPCAL_OVERRIDE_ENABLE);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+ {
+ const uint32_t addr = mmAUXP_IMPCAL;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUXP_IMPCAL,
+ AUXP_IMPCAL_OVERRIDE_ENABLE);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUXP_IMPCAL,
+ AUXP_IMPCAL_OVERRIDE_ENABLE);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+
+ /* set the delay and the number of bytes to write */
+ {
+ const uint32_t addr = aux_engine->addr.aux_sw_control;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ request->delay,
+ AUX_SW_CONTROL,
+ AUX_SW_START_DELAY);
+
+ /* The length include
+ * the 4 bit header and the 20 bit address
+ * (that is 3 byte).
+ * If the requested length is non zero this means
+ * an addition byte specifying the length is required. */
+
+ length = request->length ? 4 : 3;
+ if (is_write)
+ length += request->length;
+
+ set_reg_field_value(
+ value,
+ length,
+ AUX_SW_CONTROL,
+ AUX_SW_WR_BYTES);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+
+ /* program action and address and payload data (if 'is_write') */
+ {
+ const uint32_t addr = aux_engine->addr.aux_sw_data;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUX_SW_DATA,
+ AUX_SW_INDEX);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUX_SW_DATA,
+ AUX_SW_DATA_RW);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_SW_DATA,
+ AUX_SW_AUTOINCREMENT_DISABLE);
+
+ set_reg_field_value(
+ value,
+ COMPOSE_AUX_SW_DATA_16_20(
+ request->action, request->address),
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUX_SW_DATA,
+ AUX_SW_AUTOINCREMENT_DISABLE);
+
+ set_reg_field_value(
+ value,
+ COMPOSE_AUX_SW_DATA_8_15(request->address),
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ COMPOSE_AUX_SW_DATA_0_7(request->address),
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ if (request->length) {
+ set_reg_field_value(
+ value,
+ request->length - 1,
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+
+ if (is_write) {
+ /* Load the HW buffer with the Data to be sent.
+ * This is relevant for write operation.
+ * For read, the data recived data will be
+ * processed in process_channel_reply(). */
+ uint32_t i = 0;
+
+ while (i < request->length) {
+
+ set_reg_field_value(
+ value,
+ request->data[i],
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ dm_write_reg(
+ engine->base.ctx, addr, value);
+
+ ++i;
+ }
+ }
+ }
+
+ {
+ const uint32_t addr = aux_engine->addr.aux_interrupt_control;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_INTERRUPT_CONTROL,
+ AUX_SW_DONE_ACK);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+
+ {
+ const uint32_t addr = aux_engine->addr.aux_sw_control;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_SW_CONTROL,
+ AUX_SW_GO);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+ }
+}
+
+static void process_channel_reply(
+ struct aux_engine *engine,
+ struct aux_reply_transaction_data *reply)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+ /* Need to do a read to get the number of bytes to process
+ * Alternatively, this information can be passed -
+ * but that causes coupling which isn't good either. */
+
+ uint32_t bytes_replied;
+ uint32_t value;
+
+ {
+ const uint32_t addr = aux_engine->addr.aux_sw_status;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ bytes_replied = get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_REPLY_BYTE_COUNT);
+ }
+
+ if (bytes_replied) {
+ uint32_t reply_result;
+
+ const uint32_t addr = aux_engine->addr.aux_sw_data;
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ AUX_SW_DATA,
+ AUX_SW_INDEX);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_SW_DATA,
+ AUX_SW_AUTOINCREMENT_DISABLE);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ set_reg_field_value(
+ value,
+ 1,
+ AUX_SW_DATA,
+ AUX_SW_DATA_RW);
+
+ dm_write_reg(engine->base.ctx, addr, value);
+
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ reply_result = get_reg_field_value(
+ value,
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ reply_result = reply_result >> 4;
+
+ switch (reply_result) {
+ case 0: /* ACK */ {
+ uint32_t i = 0;
+
+ /* first byte was already used
+ * to get the command status */
+ --bytes_replied;
+
+ while (i < bytes_replied) {
+ value = dm_read_reg(
+ engine->base.ctx, addr);
+
+ reply->data[i] = get_reg_field_value(
+ value,
+ AUX_SW_DATA,
+ AUX_SW_DATA);
+
+ ++i;
+ }
+
+ reply->status = AUX_TRANSACTION_REPLY_AUX_ACK;
+ }
+ break;
+ case 1: /* NACK */
+ reply->status = AUX_TRANSACTION_REPLY_AUX_NACK;
+ break;
+ case 2: /* DEFER */
+ reply->status = AUX_TRANSACTION_REPLY_AUX_DEFER;
+ break;
+ case 4: /* AUX ACK / I2C NACK */
+ reply->status = AUX_TRANSACTION_REPLY_I2C_NACK;
+ break;
+ case 8: /* AUX ACK / I2C DEFER */
+ reply->status = AUX_TRANSACTION_REPLY_I2C_DEFER;
+ break;
+ default:
+ reply->status = AUX_TRANSACTION_REPLY_INVALID;
+ }
+ } else {
+ /* Need to handle an error case...
+ * hopefully, upper layer function won't call this function
+ * if the number of bytes in the reply was 0
+ * because there was surely an error that was asserted
+ * that should have been handled
+ * for hot plug case, this could happens*/
+ if (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK))
+ ASSERT_CRITICAL(false);
+ }
+}
+
+static enum aux_channel_operation_result get_channel_status(
+ struct aux_engine *engine,
+ uint8_t *returned_bytes)
+{
+ struct aux_engine_dce110 *aux_engine = FROM_AUX_ENGINE(engine);
+
+ const uint32_t addr = aux_engine->addr.aux_sw_status;
+
+ uint32_t value;
+ uint32_t aux_sw_done;
+
+ if (returned_bytes == NULL) {
+ /*caller pass NULL pointer*/
+ ASSERT_CRITICAL(false);
+ return AUX_CHANNEL_OPERATION_FAILED_REASON_UNKNOWN;
+ }
+ *returned_bytes = 0;
+
+ /* poll to make sure that SW_DONE is asserted */
+ {
+ uint32_t time_elapsed = 0;
+
+ do {
+ value = dm_read_reg(engine->base.ctx, addr);
+
+ aux_sw_done = get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_DONE);
+
+ if (aux_sw_done)
+ break;
+
+ dm_delay_in_microseconds(engine->base.ctx, 10);
+
+ time_elapsed += 10;
+ } while (time_elapsed < aux_engine->timeout_period);
+
+
+ }
+
+ /* Note that the following bits are set in 'status.bits'
+ * during CTS 4.2.1.2:
+ * AUX_SW_RX_MIN_COUNT_VIOL, AUX_SW_RX_INVALID_STOP,
+ * AUX_SW_RX_RECV_NO_DET, AUX_SW_RX_RECV_INVALID_H.
+ *
+ * AUX_SW_RX_MIN_COUNT_VIOL is an internal,
+ * HW debugging bit and should be ignored. */
+ if (aux_sw_done) {
+ if (get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_RX_TIMEOUT_STATE) ||
+ get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_RX_TIMEOUT))
+ return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT;
+ else if (get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_RX_INVALID_STOP))
+ return AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY;
+
+ *returned_bytes = get_reg_field_value(
+ value,
+ AUX_SW_STATUS,
+ AUX_SW_REPLY_BYTE_COUNT);
+ if (*returned_bytes == 0)
+ return
+ AUX_CHANNEL_OPERATION_FAILED_INVALID_REPLY;
+ else {
+ *returned_bytes -= 1;
+ return AUX_CHANNEL_OPERATION_SUCCEEDED;
+ }
+ } else {
+ /*time_elapsed >= aux_engine->timeout_period */
+ if (!(value & AUX_SW_STATUS__AUX_SW_HPD_DISCON_MASK))
+ ASSERT_CRITICAL(false);
+ return AUX_CHANNEL_OPERATION_FAILED_TIMEOUT;
+ }
+}
+
+static const int32_t aux_channel_offset[] = {
+ mmDP_AUX0_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+ mmDP_AUX1_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+ mmDP_AUX2_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+ mmDP_AUX3_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+ mmDP_AUX4_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL,
+ mmDP_AUX5_AUX_CONTROL - mmDP_AUX0_AUX_CONTROL
+};
+
+static const struct aux_engine_funcs aux_engine_funcs = {
+ .destroy = destroy,
+ .acquire_engine = acquire_engine,
+ .configure = configure,
+ .start_gtc_sync = start_gtc_sync,
+ .stop_gtc_sync = stop_gtc_sync,
+ .submit_channel_request = submit_channel_request,
+ .process_channel_reply = process_channel_reply,
+ .get_channel_status = get_channel_status,
+};
+
+static const struct engine_funcs engine_funcs = {
+ .release_engine = release_engine,
+ .submit_request = dal_aux_engine_submit_request,
+ .keep_power_up_count = dal_i2caux_keep_power_up_count,
+ .get_engine_type = dal_aux_engine_get_engine_type,
+ .acquire = dal_aux_engine_acquire,
+};
+
+static bool construct(
+ struct aux_engine_dce110 *engine,
+ const struct aux_engine_dce110_init_data *aux_init_data)
+{
+ int32_t offset;
+
+ if (aux_init_data->engine_id >=
+ sizeof(aux_channel_offset) / sizeof(int32_t)) {
+ ASSERT_CRITICAL(false);
+ return false;
+ }
+
+ if (!dal_aux_engine_construct(
+ &engine->base, aux_init_data->ctx)) {
+ ASSERT_CRITICAL(false);
+ return false;
+ }
+ engine->base.base.funcs = &engine_funcs;
+ engine->base.funcs = &aux_engine_funcs;
+ offset = aux_channel_offset[aux_init_data->engine_id];
+ engine->addr.aux_control = mmAUX_CONTROL + offset;
+ engine->addr.aux_arb_control = mmAUX_ARB_CONTROL + offset;
+ engine->addr.aux_sw_data = mmAUX_SW_DATA + offset;
+ engine->addr.aux_sw_control = mmAUX_SW_CONTROL + offset;
+ engine->addr.aux_interrupt_control = mmAUX_INTERRUPT_CONTROL + offset;
+ engine->addr.aux_sw_status = mmAUX_SW_STATUS + offset;
+ engine->addr.aux_gtc_sync_control = mmAUX_GTC_SYNC_CONTROL + offset;
+ engine->addr.aux_gtc_sync_status = mmAUX_GTC_SYNC_STATUS + offset;
+ engine->addr.aux_gtc_sync_controller_status =
+ mmAUX_GTC_SYNC_CONTROLLER_STATUS + offset;
+
+ engine->timeout_period = aux_init_data->timeout_period;
+
+ return true;
+}
+
+static void destruct(
+ struct aux_engine_dce110 *engine)
+{
+ dal_aux_engine_destruct(&engine->base);
+}
+
+struct aux_engine *dal_aux_engine_dce110_create(
+ const struct aux_engine_dce110_init_data *aux_init_data)
+{
+ struct aux_engine_dce110 *engine;
+
+ if (!aux_init_data) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ engine = dm_alloc(aux_init_data->ctx, sizeof(*engine));
+
+ if (!engine) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ if (construct(engine, aux_init_data))
+ return &engine->base;
+
+ ASSERT_CRITICAL(false);
+
+ dm_free(aux_init_data->ctx, engine);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.h
new file mode 100644
index 000000000000..ec6899ed5b40
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/aux_engine_dce110.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_AUX_ENGINE_DCE110_H__
+#define __DAL_AUX_ENGINE_DCE110_H__
+
+#include "../aux_engine.h"
+
+struct aux_engine_dce110 {
+ struct aux_engine base;
+ struct {
+ uint32_t aux_control;
+ uint32_t aux_arb_control;
+ uint32_t aux_sw_data;
+ uint32_t aux_sw_control;
+ uint32_t aux_interrupt_control;
+ uint32_t aux_sw_status;
+ uint32_t aux_gtc_sync_control;
+ uint32_t aux_gtc_sync_status;
+ uint32_t aux_gtc_sync_controller_status;
+ } addr;
+ uint32_t timeout_period;
+};
+
+struct aux_engine_dce110_init_data {
+ uint32_t engine_id;
+ uint32_t timeout_period;
+ struct dc_context *ctx;
+};
+
+struct aux_engine *dal_aux_engine_dce110_create(
+ const struct aux_engine_dce110_init_data *aux_init_data);
+
+#endif
diff --git
a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_generic_hw_engine_dce110.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_generic_hw_engine_dce110.h
new file mode 100644
index 000000000000..e6b6a972a0e5
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_generic_hw_engine_dce110.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.c
new file mode 100644
index 000000000000..2517f44f7297
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.c
@@ -0,0 +1,954 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+#include "include/logger_interface.h"
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_hw_engine.h"
+#include "../i2c_generic_hw_engine.h"
+/*
+ * Header of this unit
+ */
+
+#include "i2c_hw_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+#include "dce/dce_11_0_d.h"
+#include "dce/dce_11_0_sh_mask.h"
+
+/*
+ * This unit
+ */
+
+enum dc_i2c_status {
+ DC_I2C_STATUS__DC_I2C_STATUS_IDLE,
+ DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW,
+ DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_HW
+};
+
+enum dc_i2c_arbitration {
+ DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL,
+ DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_HIGH
+};
+
+enum {
+ /* No timeout in HW
+ * (timeout implemented in SW by querying status) */
+ I2C_SETUP_TIME_LIMIT = 255,
+ I2C_HW_BUFFER_SIZE = 144
+};
+
+/*
+ * @brief
+ * Cast pointer to 'struct i2c_hw_engine *'
+ * to pointer 'struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_I2C_HW_ENGINE(ptr) \
+ container_of((ptr), struct i2c_hw_engine_dce110, base)
+/*
+ * @brief
+ * Cast pointer to 'struct i2c_engine *'
+ * to pointer to 'struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+ FROM_I2C_HW_ENGINE(container_of((ptr), struct i2c_hw_engine, base))
+
+/*
+ * @brief
+ * Cast pointer to 'struct engine *'
+ * to 'pointer to struct i2c_hw_engine_dce110 *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+
+static void disable_i2c_hw_engine(
+ struct i2c_hw_engine_dce110 *engine)
+{
+ const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+ uint32_t value = 0;
+
+ struct dc_context *ctx = NULL;
+
+ ctx = engine->base.base.base.ctx;
+
+ value = dm_read_reg(ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_ENABLE);
+
+ dm_write_reg(ctx, addr, value);
+}
+
+static void release_engine(
+ struct engine *engine)
+{
+ struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
+
+ struct i2c_engine *base = NULL;
+ bool safe_to_reset;
+ uint32_t value = 0;
+
+ base = &hw_engine->base.base;
+
+ /* Restore original HW engine speed */
+
+ base->funcs->set_speed(base, hw_engine->base.original_speed);
+
+ /* Release I2C */
+ {
+ value = dm_read_reg(engine->ctx, mmDC_I2C_ARBITRATION);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_ARBITRATION,
+ DC_I2C_SW_DONE_USING_I2C_REG);
+
+ dm_write_reg(engine->ctx, mmDC_I2C_ARBITRATION, value);
+ }
+
+ /* Reset HW engine */
+ {
+ uint32_t i2c_sw_status = 0;
+
+ value = dm_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+ i2c_sw_status = get_reg_field_value(
+ value,
+ DC_I2C_SW_STATUS,
+ DC_I2C_SW_STATUS);
+ /* if used by SW, safe to reset */
+ safe_to_reset = (i2c_sw_status == 1);
+ }
+ {
+ value = dm_read_reg(engine->ctx, mmDC_I2C_CONTROL);
+
+ if (safe_to_reset)
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_CONTROL,
+ DC_I2C_SOFT_RESET);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_CONTROL,
+ DC_I2C_SW_STATUS_RESET);
+
+ dm_write_reg(engine->ctx, mmDC_I2C_CONTROL, value);
+ }
+
+ /* HW I2c engine - clock gating feature */
+ if (!hw_engine->engine_keep_power_up_count)
+ disable_i2c_hw_engine(hw_engine);
+}
+
+static void keep_power_up_count(
+ struct engine *engine,
+ bool keep_power_up)
+{
+ struct i2c_hw_engine_dce110 *hw_engine = FROM_ENGINE(engine);
+
+ if (keep_power_up)
+ ++hw_engine->engine_keep_power_up_count;
+ else {
+ --hw_engine->engine_keep_power_up_count;
+
+ if (!hw_engine->engine_keep_power_up_count)
+ disable_i2c_hw_engine(hw_engine);
+ }
+}
+
+static bool setup_engine(
+ struct i2c_engine *i2c_engine)
+{
+ uint32_t value = 0;
+ struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+ /* Program pin select */
+ {
+ const uint32_t addr = mmDC_I2C_CONTROL;
+
+ value = dm_read_reg(i2c_engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_GO);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SOFT_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SEND_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SW_STATUS_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_TRANSACTION_COUNT);
+
+ set_reg_field_value(
+ value,
+ engine->engine_id,
+ DC_I2C_CONTROL,
+ DC_I2C_DDC_SELECT);
+
+
+ dm_write_reg(i2c_engine->base.ctx, addr, value);
+ }
+
+ /* Program time limit */
+ {
+ const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+ value = dm_read_reg(i2c_engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ I2C_SETUP_TIME_LIMIT,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_TIME_LIMIT);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_ENABLE);
+
+ dm_write_reg(i2c_engine->base.ctx, addr, value);
+ }
+
+ /* Program HW priority
+ * set to High - interrupt software I2C at any time
+ * Enable restart of SW I2C that was interrupted by HW
+ * disable queuing of software while I2C is in use by HW */
+ {
+ value = dm_read_reg(i2c_engine->base.ctx,
+ mmDC_I2C_ARBITRATION);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_ARBITRATION,
+ DC_I2C_NO_QUEUED_SW_GO);
+
+ set_reg_field_value(
+ value,
+ DC_I2C_ARBITRATION__DC_I2C_SW_PRIORITY_NORMAL,
+ DC_I2C_ARBITRATION,
+ DC_I2C_SW_PRIORITY);
+
+ dm_write_reg(i2c_engine->base.ctx,
+ mmDC_I2C_ARBITRATION, value);
+ }
+
+ return true;
+}
+
+static uint32_t get_speed(
+ const struct i2c_engine *i2c_engine)
+{
+ const struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+ const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+ uint32_t pre_scale = 0;
+
+ uint32_t value = dm_read_reg(i2c_engine->base.ctx, addr);
+
+ pre_scale = get_reg_field_value(
+ value,
+ DC_I2C_DDC1_SPEED,
+ DC_I2C_DDC1_PRESCALE);
+
+ /* [anaumov] it seems following is unnecessary */
+ /*ASSERT(value.bits.DC_I2C_DDC1_PRESCALE);*/
+
+ return pre_scale ?
+ engine->reference_frequency / pre_scale :
+ engine->base.default_speed;
+}
+
+static void set_speed(
+ struct i2c_engine *i2c_engine,
+ uint32_t speed)
+{
+ struct i2c_hw_engine_dce110 *engine = FROM_I2C_ENGINE(i2c_engine);
+
+ if (speed) {
+ const uint32_t addr = engine->addr.DC_I2C_DDCX_SPEED;
+
+ uint32_t value = dm_read_reg(i2c_engine->base.ctx, addr);
+
+ set_reg_field_value(
+ value,
+ engine->reference_frequency / speed,
+ DC_I2C_DDC1_SPEED,
+ DC_I2C_DDC1_PRESCALE);
+
+ set_reg_field_value(
+ value,
+ 2,
+ DC_I2C_DDC1_SPEED,
+ DC_I2C_DDC1_THRESHOLD);
+
+ /*DCE11, HW add 100Khz support for I2c*/
+ if (speed > 50) {
+ set_reg_field_value(
+ value,
+ 2,
+ DC_I2C_DDC1_SPEED,
+ DC_I2C_DDC1_START_STOP_TIMING_CNTL);
+ } else {
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_DDC1_SPEED,
+ DC_I2C_DDC1_START_STOP_TIMING_CNTL);
+ }
+
+ dm_write_reg(i2c_engine->base.ctx, addr, value);
+ }
+}
+
+static inline void reset_hw_engine(struct engine *engine)
+{
+ uint32_t value = dm_read_reg(engine->ctx, mmDC_I2C_CONTROL);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_CONTROL,
+ DC_I2C_SOFT_RESET);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_CONTROL,
+ DC_I2C_SW_STATUS_RESET);
+
+ dm_write_reg(engine->ctx, mmDC_I2C_CONTROL, value);
+}
+
+static bool is_hw_busy(struct engine *engine)
+{
+ uint32_t i2c_sw_status = 0;
+
+ uint32_t value = dm_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+ i2c_sw_status = get_reg_field_value(
+ value,
+ DC_I2C_SW_STATUS,
+ DC_I2C_SW_STATUS);
+
+ if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_IDLE)
+ return false;
+
+ reset_hw_engine(engine);
+
+ value = dm_read_reg(engine->ctx, mmDC_I2C_SW_STATUS);
+
+ i2c_sw_status = get_reg_field_value(
+ value,
+ DC_I2C_SW_STATUS,
+ DC_I2C_SW_STATUS);
+
+ return i2c_sw_status != DC_I2C_STATUS__DC_I2C_STATUS_IDLE;
+}
+
+/*
+ * @brief
+ * DC_GPIO_DDC MM register offsets
+ */
+static const uint32_t transaction_addr[] = {
+ mmDC_I2C_TRANSACTION0,
+ mmDC_I2C_TRANSACTION1,
+ mmDC_I2C_TRANSACTION2,
+ mmDC_I2C_TRANSACTION3
+};
+
+static bool process_transaction(
+ struct i2c_hw_engine_dce110 *engine,
+ struct i2c_request_transaction_data *request)
+{
+ uint8_t length = request->length;
+ uint8_t *buffer = request->data;
+
+ bool last_transaction = false;
+ uint32_t value = 0;
+
+ struct dc_context *ctx = NULL;
+
+ ctx = engine->base.base.base.ctx;
+
+ {
+ const uint32_t addr =
+ transaction_addr[engine->transaction_count];
+
+ value = dm_read_reg(ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_TRANSACTION0,
+ DC_I2C_STOP_ON_NACK0);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_TRANSACTION0,
+ DC_I2C_START0);
+
+
+ if ((engine->transaction_count == 3) ||
+ (request->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+ (request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) {
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_TRANSACTION0,
+ DC_I2C_STOP0);
+
+ last_transaction = true;
+ } else
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_TRANSACTION0,
+ DC_I2C_STOP0);
+
+ set_reg_field_value(
+ value,
+ (0 != (request->action &
+ I2CAUX_TRANSACTION_ACTION_I2C_READ)),
+ DC_I2C_TRANSACTION0,
+ DC_I2C_RW0);
+
+ set_reg_field_value(
+ value,
+ length,
+ DC_I2C_TRANSACTION0,
+ DC_I2C_COUNT0);
+
+ dm_write_reg(ctx, addr, value);
+ }
+
+ /* Write the I2C address and I2C data
+ * into the hardware circular buffer, one byte per entry.
+ * As an example, the 7-bit I2C slave address for CRT monitor
+ * for reading DDC/EDID information is 0b1010001.
+ * For an I2C send operation, the LSB must be programmed to 0;
+ * for I2C receive operation, the LSB must be programmed to 1. */
+
+ {
+ value = 0;
+
+ set_reg_field_value(
+ value,
+ false,
+ DC_I2C_DATA,
+ DC_I2C_DATA_RW);
+
+ set_reg_field_value(
+ value,
+ request->address,
+ DC_I2C_DATA,
+ DC_I2C_DATA);
+
+ if (engine->transaction_count == 0) {
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DATA,
+ DC_I2C_INDEX);
+
+ /*enable index write*/
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_DATA,
+ DC_I2C_INDEX_WRITE);
+
+ engine->buffer_used_write = 0;
+ }
+
+ dm_write_reg(ctx, mmDC_I2C_DATA, value);
+
+ engine->buffer_used_write++;
+
+ if (!(request->action & I2CAUX_TRANSACTION_ACTION_I2C_READ)) {
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DATA,
+ DC_I2C_INDEX_WRITE);
+
+ while (length) {
+
+ set_reg_field_value(
+ value,
+ *buffer++,
+ DC_I2C_DATA,
+ DC_I2C_DATA);
+
+ dm_write_reg(ctx, mmDC_I2C_DATA, value);
+
+ engine->buffer_used_write++;
+ --length;
+ }
+ }
+ }
+
+ ++engine->transaction_count;
+ engine->buffer_used_bytes += length + 1;
+
+ return last_transaction;
+}
+
+static void execute_transaction(
+ struct i2c_hw_engine_dce110 *engine)
+{
+ uint32_t value = 0;
+ struct dc_context *ctx = NULL;
+
+ ctx = engine->base.base.base.ctx;
+
+ {
+ const uint32_t addr = engine->addr.DC_I2C_DDCX_SETUP;
+
+ value = dm_read_reg(ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_DATA_DRIVE_EN);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_CLK_DRIVE_EN);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_DATA_DRIVE_SEL);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_INTRA_TRANSACTION_DELAY);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_DDC1_SETUP,
+ DC_I2C_DDC1_INTRA_BYTE_DELAY);
+
+ dm_write_reg(ctx, addr, value);
+ }
+
+ {
+ const uint32_t addr = mmDC_I2C_CONTROL;
+
+ value = dm_read_reg(ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SOFT_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SW_STATUS_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_SEND_RESET);
+
+ set_reg_field_value(
+ value,
+ 0,
+ DC_I2C_CONTROL,
+ DC_I2C_GO);
+
+ set_reg_field_value(
+ value,
+ engine->transaction_count - 1,
+ DC_I2C_CONTROL,
+ DC_I2C_TRANSACTION_COUNT);
+
+ dm_write_reg(ctx, addr, value);
+ }
+
+ /* start I2C transfer */
+ {
+ const uint32_t addr = mmDC_I2C_CONTROL;
+
+ value = dm_read_reg(ctx, addr);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_CONTROL,
+ DC_I2C_GO);
+
+ dm_write_reg(ctx, addr, value);
+ }
+
+ /* all transactions were executed and HW buffer became empty
+ * (even though it actually happens when status becomes DONE) */
+ engine->transaction_count = 0;
+ engine->buffer_used_bytes = 0;
+}
+
+static void submit_channel_request(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *request)
+{
+ request->status = I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+ if (!process_transaction(FROM_I2C_ENGINE(engine), request))
+ return;
+
+ if (is_hw_busy(&engine->base)) {
+ request->status = I2C_CHANNEL_OPERATION_ENGINE_BUSY;
+ return;
+ }
+
+ execute_transaction(FROM_I2C_ENGINE(engine));
+}
+
+static void process_channel_reply(
+ struct i2c_engine *engine,
+ struct i2c_reply_transaction_data *reply)
+{
+ uint8_t length = reply->length;
+ uint8_t *buffer = reply->data;
+
+ struct i2c_hw_engine_dce110 *i2c_hw_engine_dce110 =
+ FROM_I2C_ENGINE(engine);
+
+ uint32_t value = 0;
+
+ /*set index*/
+ set_reg_field_value(
+ value,
+ i2c_hw_engine_dce110->buffer_used_write,
+ DC_I2C_DATA,
+ DC_I2C_INDEX);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_DATA,
+ DC_I2C_DATA_RW);
+
+ set_reg_field_value(
+ value,
+ 1,
+ DC_I2C_DATA,
+ DC_I2C_INDEX_WRITE);
+
+ dm_write_reg(engine->base.ctx, mmDC_I2C_DATA, value);
+
+ while (length) {
+ /* after reading the status,
+ * if the I2C operation executed successfully
+ * (i.e. DC_I2C_STATUS_DONE = 1) then the I2C controller
+ * should read data bytes from I2C circular data buffer */
+
+ value = dm_read_reg(engine->base.ctx, mmDC_I2C_DATA);
+
+ *buffer++ = get_reg_field_value(
+ value,
+ DC_I2C_DATA,
+ DC_I2C_DATA);
+
+ --length;
+ }
+}
+
+static enum i2c_channel_operation_result get_channel_status(
+ struct i2c_engine *engine,
+ uint8_t *returned_bytes)
+{
+ uint32_t i2c_sw_status = 0;
+ uint32_t value = dm_read_reg(engine->base.ctx, mmDC_I2C_SW_STATUS);
+
+ i2c_sw_status = get_reg_field_value(
+ value,
+ DC_I2C_SW_STATUS,
+ DC_I2C_SW_STATUS);
+
+ if (i2c_sw_status == DC_I2C_STATUS__DC_I2C_STATUS_USED_BY_SW)
+ return I2C_CHANNEL_OPERATION_ENGINE_BUSY;
+ else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_STOPPED_ON_NACK_MASK)
+ return I2C_CHANNEL_OPERATION_NO_RESPONSE;
+ else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_TIMEOUT_MASK)
+ return I2C_CHANNEL_OPERATION_TIMEOUT;
+ else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_ABORTED_MASK)
+ return I2C_CHANNEL_OPERATION_FAILED;
+ else if (value & DC_I2C_SW_STATUS__DC_I2C_SW_DONE_MASK)
+ return I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+ /* in DAL2, I2C_RESULT_OK was returned */
+ return I2C_CHANNEL_OPERATION_NOT_STARTED;
+}
+
+static uint8_t get_hw_buffer_available_size(
+ const struct i2c_hw_engine *engine)
+{
+ return I2C_HW_BUFFER_SIZE -
+ FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes;
+}
+
+static uint32_t get_transaction_timeout(
+ const struct i2c_hw_engine *engine,
+ uint32_t length)
+{
+ uint32_t speed = engine->base.funcs->get_speed(&engine->base);
+
+ uint32_t period_timeout;
+ uint32_t num_of_clock_stretches;
+
+ if (!speed)
+ return 0;
+
+ period_timeout = (1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed;
+
+ num_of_clock_stretches = 1 + (length << 3) + 1;
+ num_of_clock_stretches +=
+ (FROM_I2C_HW_ENGINE(engine)->buffer_used_bytes << 3) +
+ (FROM_I2C_HW_ENGINE(engine)->transaction_count << 1);
+
+ return period_timeout * num_of_clock_stretches;
+}
+
+static void destroy(
+ struct i2c_engine **i2c_engine)
+{
+ struct i2c_hw_engine_dce110 *engine_dce110 =
+ FROM_I2C_ENGINE(*i2c_engine);
+
+ dal_i2c_hw_engine_destruct(&engine_dce110->base);
+
+ dm_free((*i2c_engine)->base.ctx, engine_dce110);
+
+ *i2c_engine = NULL;
+}
+/*
+ * @brief
+ * DC_I2C_DDC1_SETUP MM register offsets
+ *
+ * @note
+ * The indices of this offset array are DDC engine IDs
+ */
+static const int32_t ddc_setup_offset[] = {
+
+ mmDC_I2C_DDC1_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 1 */
+ mmDC_I2C_DDC2_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 2 */
+ mmDC_I2C_DDC3_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 3 */
+ mmDC_I2C_DDC4_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 4 */
+ mmDC_I2C_DDC5_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 5 */
+ mmDC_I2C_DDC6_SETUP - mmDC_I2C_DDC1_SETUP, /* DDC Engine 6 */
+ mmDC_I2C_DDCVGA_SETUP - mmDC_I2C_DDC1_SETUP /* DDC Engine 7 */
+};
+
+/*
+ * @brief
+ * DC_I2C_DDC1_SPEED MM register offsets
+ *
+ * @note
+ * The indices of this offset array are DDC engine IDs
+ */
+static const int32_t ddc_speed_offset[] = {
+ mmDC_I2C_DDC1_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 1 */
+ mmDC_I2C_DDC2_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 2 */
+ mmDC_I2C_DDC3_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 3 */
+ mmDC_I2C_DDC4_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 4 */
+ mmDC_I2C_DDC5_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 5 */
+ mmDC_I2C_DDC6_SPEED - mmDC_I2C_DDC1_SPEED, /* DDC Engine 6 */
+ mmDC_I2C_DDCVGA_SPEED - mmDC_I2C_DDC1_SPEED /* DDC Engine 7 */
+};
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+ .destroy = destroy,
+ .get_speed = get_speed,
+ .set_speed = set_speed,
+ .setup_engine = setup_engine,
+ .submit_channel_request = submit_channel_request,
+ .process_channel_reply = process_channel_reply,
+ .get_channel_status = get_channel_status,
+ .acquire_engine = dal_i2c_hw_engine_acquire_engine,
+};
+
+static const struct engine_funcs engine_funcs = {
+ .release_engine = release_engine,
+ .keep_power_up_count = keep_power_up_count,
+ .get_engine_type = dal_i2c_hw_engine_get_engine_type,
+ .acquire = dal_i2c_engine_acquire,
+ .submit_request = dal_i2c_hw_engine_submit_request,
+};
+
+static const struct i2c_hw_engine_funcs i2c_hw_engine_funcs = {
+ .get_hw_buffer_available_size = get_hw_buffer_available_size,
+ .get_transaction_timeout = get_transaction_timeout,
+ .wait_on_operation_result = dal_i2c_hw_engine_wait_on_operation_result,
+};
+
+static bool construct(
+ struct i2c_hw_engine_dce110 *engine_dce110,
+ const struct i2c_hw_engine_dce110_create_arg *arg)
+{
+ uint32_t xtal_ref_div = 0;
+ uint32_t value = 0;
+
+ /*ddc_setup_offset of dce80 and dce110 have the same register name
+ * but different offset. Do not need different array*/
+ if (arg->engine_id >= sizeof(ddc_setup_offset) / sizeof(int32_t))
+ return false;
+ if (arg->engine_id >= sizeof(ddc_speed_offset) / sizeof(int32_t))
+ return false;
+ if (!arg->reference_frequency)
+ return false;
+
+ if (!dal_i2c_hw_engine_construct(&engine_dce110->base, arg->ctx))
+ return false;
+
+ engine_dce110->base.base.base.funcs = &engine_funcs;
+ engine_dce110->base.base.funcs = &i2c_engine_funcs;
+ engine_dce110->base.funcs = &i2c_hw_engine_funcs;
+ engine_dce110->base.default_speed = arg->default_speed;
+
+ engine_dce110->engine_id = arg->engine_id;
+
+ engine_dce110->buffer_used_bytes = 0;
+ engine_dce110->transaction_count = 0;
+ engine_dce110->engine_keep_power_up_count = 1;
+
+ /*values which are not included by arg*/
+ engine_dce110->addr.DC_I2C_DDCX_SETUP =
+ mmDC_I2C_DDC1_SETUP + ddc_setup_offset[arg->engine_id];
+ engine_dce110->addr.DC_I2C_DDCX_SPEED =
+ mmDC_I2C_DDC1_SPEED + ddc_speed_offset[arg->engine_id];
+
+
+ value = dm_read_reg(
+ engine_dce110->base.base.base.ctx,
+ mmMICROSECOND_TIME_BASE_DIV);
+
+ xtal_ref_div = get_reg_field_value(
+ value,
+ MICROSECOND_TIME_BASE_DIV,
+ XTAL_REF_DIV);
+
+ if (xtal_ref_div == 0) {
+ dal_logger_write(
+ engine_dce110->base.base.base.ctx->logger,
+ LOG_MAJOR_WARNING,
+ LOG_MINOR_COMPONENT_I2C_AUX,
+ "Invalid base timer divider\n",
+ __func__);
+ xtal_ref_div = 2;
+ }
+
+ /*Calculating Reference Clock by divding original frequency by
+ * XTAL_REF_DIV.
+ * At upper level, uint32_t reference_frequency =
+ * dal_i2caux_get_reference_clock(as) >> 1
+ * which already divided by 2. So we need x2 to get original
+ * reference clock from ppll_info
+ */
+ engine_dce110->reference_frequency =
+ (arg->reference_frequency * 2) / xtal_ref_div;
+
+
+ return true;
+}
+
+struct i2c_engine *dal_i2c_hw_engine_dce110_create(
+ const struct i2c_hw_engine_dce110_create_arg *arg)
+{
+ struct i2c_hw_engine_dce110 *engine_dce10;
+
+ if (!arg) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ engine_dce10 = dm_alloc(arg->ctx, sizeof(struct i2c_hw_engine_dce110));
+
+ if (!engine_dce10) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ if (construct(engine_dce10, arg))
+ return &engine_dce10->base.base;
+
+ ASSERT_CRITICAL(false);
+
+ dm_free(arg->ctx, engine_dce10);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.h
new file mode 100644
index 000000000000..fc2ae365f8ed
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_hw_engine_dce110.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_HW_ENGINE_DCE110_H__
+#define __DAL_I2C_HW_ENGINE_DCE110_H__
+
+struct i2c_hw_engine_dce110 {
+ struct i2c_hw_engine base;
+ struct {
+ uint32_t DC_I2C_DDCX_SETUP;
+ uint32_t DC_I2C_DDCX_SPEED;
+ } addr;
+ uint32_t engine_id;
+ /* expressed in kilohertz */
+ uint32_t reference_frequency;
+ /* number of bytes currently used in HW buffer */
+ uint32_t buffer_used_bytes;
+ /* number of bytes used for write transaction in HW buffer
+ * - this will be used as the index to read from*/
+ uint32_t buffer_used_write;
+ /* number of pending transactions (before GO) */
+ uint32_t transaction_count;
+ uint32_t engine_keep_power_up_count;
+};
+
+struct i2c_hw_engine_dce110_create_arg {
+ uint32_t engine_id;
+ uint32_t reference_frequency;
+ uint32_t default_speed;
+ struct dc_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_hw_engine_dce110_create(
+ const struct i2c_hw_engine_dce110_create_arg *arg);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.c
new file mode 100644
index 000000000000..f060b25d1618
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_sw_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_sw_engine *'
+ * to 'struct i2c_sw_engine_dce110 *'
+ */
+#define FROM_I2C_SW_ENGINE(ptr) \
+ container_of((ptr), struct i2c_sw_engine_dce110, base)
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_sw_engine_dce80 *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+ FROM_I2C_SW_ENGINE(container_of((ptr), struct i2c_sw_engine, base))
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_sw_engine_dce80 *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+static void release_engine(
+ struct engine *engine)
+{
+}
+
+static void destruct(
+ struct i2c_sw_engine_dce110 *engine)
+{
+ dal_i2c_sw_engine_destruct(&engine->base);
+}
+
+static void destroy(
+ struct i2c_engine **engine)
+{
+ struct i2c_sw_engine_dce110 *sw_engine = FROM_I2C_ENGINE(*engine);
+
+ destruct(sw_engine);
+
+ dm_free((*engine)->base.ctx, sw_engine);
+
+ *engine = NULL;
+}
+
+static bool acquire_engine(
+ struct i2c_engine *engine,
+ struct ddc *ddc_handle)
+{
+ return dal_i2caux_i2c_sw_engine_acquire_engine(engine, ddc_handle);
+}
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+ .acquire_engine = acquire_engine,
+ .destroy = destroy,
+ .get_speed = dal_i2c_sw_engine_get_speed,
+ .set_speed = dal_i2c_sw_engine_set_speed,
+ .setup_engine = dal_i2c_engine_setup_i2c_engine,
+ .submit_channel_request = dal_i2c_sw_engine_submit_channel_request,
+ .process_channel_reply = dal_i2c_engine_process_channel_reply,
+ .get_channel_status = dal_i2c_sw_engine_get_channel_status,
+};
+
+static const struct engine_funcs engine_funcs = {
+ .release_engine = release_engine,
+ .get_engine_type = dal_i2c_sw_engine_get_engine_type,
+ .acquire = dal_i2c_engine_acquire,
+ .submit_request = dal_i2c_sw_engine_submit_request,
+ .keep_power_up_count = dal_i2caux_keep_power_up_count,
+};
+
+static bool construct(
+ struct i2c_sw_engine_dce110 *engine_dce110,
+ const struct i2c_sw_engine_dce110_create_arg *arg_dce110)
+{
+ struct i2c_sw_engine_create_arg arg_base;
+
+ arg_base.ctx = arg_dce110->ctx;
+ arg_base.default_speed = arg_dce110->default_speed;
+
+ if (!dal_i2c_sw_engine_construct(
+ &engine_dce110->base, &arg_base)) {
+ ASSERT_CRITICAL(false);
+ return false;
+ }
+
+ /*struct engine struct engine_funcs*/
+ engine_dce110->base.base.base.funcs = &engine_funcs;
+ /*struct i2c_engine struct i2c_engine_funcs*/
+ engine_dce110->base.base.funcs = &i2c_engine_funcs;
+ engine_dce110->base.default_speed = arg_dce110->default_speed;
+ engine_dce110->engine_id = arg_dce110->engine_id;
+
+ return true;
+}
+
+struct i2c_engine *dal_i2c_sw_engine_dce110_create(
+ const struct i2c_sw_engine_dce110_create_arg *arg)
+{
+ struct i2c_sw_engine_dce110 *engine_dce110;
+
+ if (!arg) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ engine_dce110 = dm_alloc(arg->ctx, sizeof(struct i2c_sw_engine_dce110));
+
+ if (!engine_dce110) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ if (construct(engine_dce110, arg))
+ return &engine_dce110->base.base;
+
+ ASSERT_CRITICAL(false);
+
+ dm_free(arg->ctx, engine_dce110);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.h
new file mode 100644
index 000000000000..c48c61f540a8
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2c_sw_engine_dce110.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_SW_ENGINE_DCE110_H__
+#define __DAL_I2C_SW_ENGINE_DCE110_H__
+
+struct i2c_sw_engine_dce110 {
+ struct i2c_sw_engine base;
+ uint32_t engine_id;
+};
+
+struct i2c_sw_engine_dce110_create_arg {
+ uint32_t engine_id;
+ uint32_t default_speed;
+ struct dc_context *ctx;
+};
+
+struct i2c_engine *dal_i2c_sw_engine_dce110_create(
+ const struct i2c_sw_engine_dce110_create_arg *arg);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.c
new file mode 100644
index 000000000000..9c88762dbd0c
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../i2caux.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+#include "../i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+#include "i2caux_dce110.h"
+
+#include "i2c_sw_engine_dce110.h"
+#include "i2c_hw_engine_dce110.h"
+#include "aux_engine_dce110.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+/*cast pointer to struct i2caux TO pointer to struct i2caux_dce110*/
+#define FROM_I2C_AUX(ptr) \
+ container_of((ptr), struct i2caux_dce110, base)
+
+static void destruct(
+ struct i2caux_dce110 *i2caux_dce110)
+{
+ dal_i2caux_destruct(&i2caux_dce110->base);
+}
+
+static void destroy(
+ struct i2caux **i2c_engine)
+{
+ struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(*i2c_engine);
+
+ destruct(i2caux_dce110);
+
+ dm_free((*i2c_engine)->ctx, i2caux_dce110);
+
+ *i2c_engine = NULL;
+}
+
+static struct i2c_engine *acquire_i2c_hw_engine(
+ struct i2caux *i2caux,
+ struct ddc *ddc)
+{
+ struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+ struct i2c_engine *engine = NULL;
+ /* generic hw engine is not used for EDID read
+ * It may be needed for external i2c device, like thermal chip,
+ * TODO will be implemented when needed.
+ * check dce80 bool non_generic for generic hw engine;
+ */
+
+ if (!ddc)
+ return NULL;
+
+ if (dal_ddc_is_hw_supported(ddc)) {
+ enum gpio_ddc_line line = dal_ddc_get_line(ddc);
+
+ if (line < GPIO_DDC_LINE_COUNT)
+ engine = i2caux->i2c_hw_engines[line];
+ }
+
+ if (!engine)
+ return NULL;
+
+ if (!i2caux_dce110->i2c_hw_buffer_in_use &&
+ engine->base.funcs->acquire(&engine->base, ddc)) {
+ i2caux_dce110->i2c_hw_buffer_in_use = true;
+ return engine;
+ }
+
+ return NULL;
+}
+
+static void release_engine(
+ struct i2caux *i2caux,
+ struct engine *engine)
+{
+ struct i2caux_dce110 *i2caux_dce110 = FROM_I2C_AUX(i2caux);
+
+ if (engine->funcs->get_engine_type(engine) ==
+ I2CAUX_ENGINE_TYPE_I2C_DDC_HW)
+ i2caux_dce110->i2c_hw_buffer_in_use = false;
+
+ dal_i2caux_release_engine(i2caux, engine);
+}
+
+static const enum gpio_ddc_line hw_ddc_lines[] = {
+ GPIO_DDC_LINE_DDC1,
+ GPIO_DDC_LINE_DDC2,
+ GPIO_DDC_LINE_DDC3,
+ GPIO_DDC_LINE_DDC4,
+ GPIO_DDC_LINE_DDC5,
+ GPIO_DDC_LINE_DDC6,
+};
+
+static const enum gpio_ddc_line hw_aux_lines[] = {
+ GPIO_DDC_LINE_DDC1,
+ GPIO_DDC_LINE_DDC2,
+ GPIO_DDC_LINE_DDC3,
+ GPIO_DDC_LINE_DDC4,
+ GPIO_DDC_LINE_DDC5,
+ GPIO_DDC_LINE_DDC6,
+};
+
+/* function table */
+static const struct i2caux_funcs i2caux_funcs = {
+ .destroy = destroy,
+ .acquire_i2c_hw_engine = acquire_i2c_hw_engine,
+ .release_engine = release_engine,
+ .acquire_i2c_sw_engine = dal_i2caux_acquire_i2c_sw_engine,
+ .acquire_aux_engine = dal_i2caux_acquire_aux_engine,
+};
+
+static bool construct(
+ struct i2caux_dce110 *i2caux_dce110,
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ uint32_t i = 0;
+ uint32_t reference_frequency = 0;
+ bool use_i2c_sw_engine = false;
+ struct i2caux *base = NULL;
+ /*TODO: For CZ bring up, if dal_i2caux_get_reference_clock
+ * does not return 48KHz, we need hard coded for 48Khz.
+ * Some BIOS setting incorrect cause this
+ * For production, we always get value from BIOS*/
+ reference_frequency =
+ dal_i2caux_get_reference_clock(as) >> 1;
+
+ use_i2c_sw_engine = dal_adapter_service_is_feature_supported(
+ FEATURE_RESTORE_USAGE_I2C_SW_ENGINE);
+
+ base = &i2caux_dce110->base;
+
+ if (!dal_i2caux_construct(base, as, ctx)) {
+ ASSERT_CRITICAL(false);
+ return false;
+ }
+
+ i2caux_dce110->base.funcs = &i2caux_funcs;
+ i2caux_dce110->i2c_hw_buffer_in_use = false;
+ /* Create I2C engines (DDC lines per connector)
+ * different I2C/AUX usage cases, DDC, Generic GPIO, AUX.
+ */
+ do {
+ enum gpio_ddc_line line_id = hw_ddc_lines[i];
+
+ struct i2c_hw_engine_dce110_create_arg hw_arg_dce110;
+
+ if (use_i2c_sw_engine) {
+ struct i2c_sw_engine_dce110_create_arg sw_arg;
+
+ sw_arg.engine_id = i;
+ sw_arg.default_speed = base->default_i2c_sw_speed;
+ sw_arg.ctx = ctx;
+ base->i2c_sw_engines[line_id] =
+ dal_i2c_sw_engine_dce110_create(&sw_arg);
+ }
+
+ hw_arg_dce110.engine_id = i;
+ hw_arg_dce110.reference_frequency = reference_frequency;
+ hw_arg_dce110.default_speed = base->default_i2c_hw_speed;
+ hw_arg_dce110.ctx = ctx;
+
+ base->i2c_hw_engines[line_id] =
+ dal_i2c_hw_engine_dce110_create(&hw_arg_dce110);
+
+ ++i;
+ } while (i < ARRAY_SIZE(hw_ddc_lines));
+
+ /* Create AUX engines for all lines which has assisted HW AUX
+ * 'i' (loop counter) used as DDC/AUX engine_id */
+
+ i = 0;
+
+ do {
+ enum gpio_ddc_line line_id = hw_aux_lines[i];
+
+ struct aux_engine_dce110_init_data aux_init_data;
+
+ aux_init_data.engine_id = i;
+ aux_init_data.timeout_period = base->aux_timeout_period;
+ aux_init_data.ctx = ctx;
+
+ base->aux_engines[line_id] =
+ dal_aux_engine_dce110_create(&aux_init_data);
+
+ ++i;
+ } while (i < ARRAY_SIZE(hw_aux_lines));
+
+ /*TODO Generic I2C SW and HW*/
+
+ return true;
+}
+
+/*
+ * dal_i2caux_dce110_create
+ *
+ * @brief
+ * public interface to allocate memory for DCE11 I2CAUX
+ *
+ * @param
+ * struct adapter_service *as - [in]
+ * struct dc_context *ctx - [in]
+ *
+ * @return
+ * pointer to the base struct of DCE11 I2CAUX
+ */
+struct i2caux *dal_i2caux_dce110_create(
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ struct i2caux_dce110 *i2caux_dce110 =
+ dm_alloc(ctx, sizeof(struct i2caux_dce110));
+
+ if (!i2caux_dce110) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ if (construct(i2caux_dce110, as, ctx))
+ return &i2caux_dce110->base;
+
+ ASSERT_CRITICAL(false);
+
+ dm_free(ctx, i2caux_dce110);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.h
new file mode 100644
index 000000000000..1a7ba1baf3d0
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/dce110/i2caux_dce110.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_AUX_DCE110_H__
+#define __DAL_I2C_AUX_DCE110_H__
+
+struct i2caux_dce110 {
+ struct i2caux base;
+ /* indicate the I2C HW circular buffer is in use */
+ bool i2c_hw_buffer_in_use;
+};
+
+struct i2caux *dal_i2caux_dce110_create(
+ struct adapter_service *as,
+ struct dc_context *ctx);
+
+#endif /* __DAL_I2C_AUX_DCE110_H__ */
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.c
new file mode 100644
index 000000000000..f4bc39d786c8
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2012-16 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "../i2caux.h"
+#include "../engine.h"
+#include "../i2c_engine.h"
+#include "../i2c_sw_engine.h"
+#include "../i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+#include "i2caux_diag.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+static void destruct(
+ struct i2caux *i2caux)
+{
+ dal_i2caux_destruct(i2caux);
+}
+
+static void destroy(
+ struct i2caux **i2c_engine)
+{
+ destruct(*i2c_engine);
+
+ dm_free((*i2c_engine)->ctx, *i2c_engine);
+
+ *i2c_engine = NULL;
+}
+
+
+
+/* function table */
+static const struct i2caux_funcs i2caux_funcs = {
+ .destroy = destroy,
+ .acquire_i2c_hw_engine = NULL,
+ .release_engine = NULL,
+ .acquire_i2c_sw_engine = NULL,
+ .acquire_aux_engine = NULL,
+};
+
+static bool construct(
+ struct i2caux *i2caux,
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ if (!dal_i2caux_construct(i2caux, as, ctx)) {
+ ASSERT_CRITICAL(false);
+ return false;
+ }
+
+ i2caux->funcs = &i2caux_funcs;
+
+ return true;
+}
+
+struct i2caux *dal_i2caux_diag_fpga_create(
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ struct i2caux *i2caux = dm_alloc(ctx, sizeof(struct i2caux));
+
+ if (!i2caux) {
+ ASSERT_CRITICAL(false);
+ return NULL;
+ }
+
+ if (construct(i2caux, as, ctx))
+ return i2caux;
+
+ ASSERT_CRITICAL(false);
+
+ dm_free(ctx, i2caux);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.h
new file mode 100644
index 000000000000..3de250bd7660
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/diagnostics/i2caux_diag.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012-16 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_AUX_DIAG_FPGA_H__
+#define __DAL_I2C_AUX_DIAG_FPGA_H__
+
+struct i2caux *dal_i2caux_diag_fpga_create(
+ struct adapter_service *as,
+ struct dc_context *ctx);
+
+#endif /* __DAL_I2C_AUX_DIAG_FPGA_H__ */
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/engine.h
new file mode 100644
index 000000000000..d3635f884579
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/engine.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_ENGINE_H__
+#define __DAL_ENGINE_H__
+
+enum i2caux_transaction_operation {
+ I2CAUX_TRANSACTION_READ,
+ I2CAUX_TRANSACTION_WRITE
+};
+
+enum i2caux_transaction_address_space {
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C = 1,
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD
+};
+
+struct i2caux_transaction_payload {
+ enum i2caux_transaction_address_space address_space;
+ uint32_t address;
+ uint8_t length;
+ uint8_t *data;
+};
+
+enum i2caux_transaction_status {
+ I2CAUX_TRANSACTION_STATUS_UNKNOWN = (-1L),
+ I2CAUX_TRANSACTION_STATUS_SUCCEEDED,
+ I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY,
+ I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT,
+ I2CAUX_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR,
+ I2CAUX_TRANSACTION_STATUS_FAILED_NACK,
+ I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE,
+ I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION,
+ I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION,
+ I2CAUX_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW
+};
+
+struct i2caux_transaction_request {
+ enum i2caux_transaction_operation operation;
+ struct i2caux_transaction_payload payload;
+ enum i2caux_transaction_status status;
+};
+
+enum i2caux_engine_type {
+ I2CAUX_ENGINE_TYPE_UNKNOWN = (-1L),
+ I2CAUX_ENGINE_TYPE_AUX,
+ I2CAUX_ENGINE_TYPE_I2C_DDC_HW,
+ I2CAUX_ENGINE_TYPE_I2C_GENERIC_HW,
+ I2CAUX_ENGINE_TYPE_I2C_SW
+};
+
+enum i2c_default_speed {
+ I2CAUX_DEFAULT_I2C_HW_SPEED = 50,
+ I2CAUX_DEFAULT_I2C_SW_SPEED = 50
+};
+
+enum i2caux_transaction_action {
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE = 0x00,
+ I2CAUX_TRANSACTION_ACTION_I2C_READ = 0x10,
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST = 0x20,
+
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT = 0x40,
+ I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT = 0x50,
+ I2CAUX_TRANSACTION_ACTION_I2C_STATUS_REQUEST_MOT = 0x60,
+
+ I2CAUX_TRANSACTION_ACTION_DP_WRITE = 0x80,
+ I2CAUX_TRANSACTION_ACTION_DP_READ = 0x90
+};
+
+struct engine;
+
+struct engine_funcs {
+ enum i2caux_engine_type (*get_engine_type)(
+ const struct engine *engine);
+ bool (*acquire)(
+ struct engine *engine,
+ struct ddc *ddc);
+ bool (*submit_request)(
+ struct engine *engine,
+ struct i2caux_transaction_request *request,
+ bool middle_of_transaction);
+ /* [anaumov] Actually, following method is meaningful
+ * only in I2C HW engines */
+ void (*keep_power_up_count)(
+ struct engine *engine,
+ bool keep_power_up);
+ void (*release_engine)(
+ struct engine *engine);
+};
+
+struct engine {
+ const struct engine_funcs *funcs;
+ struct ddc *ddc;
+ struct dc_context *ctx;
+};
+
+bool dal_i2caux_construct_engine(
+ struct engine *engine,
+ struct dc_context *ctx);
+
+void dal_i2caux_destruct_engine(
+ struct engine *engine);
+
+void dal_i2caux_keep_power_up_count(
+ struct engine *engine,
+ bool keep_power_up);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/engine_base.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/engine_base.c
new file mode 100644
index 000000000000..9c472b9db5ba
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/engine_base.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+void dal_i2caux_keep_power_up_count(
+ struct engine *engine,
+ bool keep_power_up)
+{
+
+}
+
+bool dal_i2caux_construct_engine(
+ struct engine *engine,
+ struct dc_context *ctx)
+{
+ engine->ddc = NULL;
+ engine->ctx = ctx;
+ return true;
+}
+
+void dal_i2caux_destruct_engine(
+ struct engine *engine)
+{
+ /* nothing to do */
+}
+
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.c
new file mode 100644
index 000000000000..dccb1c51a3be
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.c
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+#define FROM_ENGINE(ptr) \
+ container_of((ptr), struct i2c_engine, base)
+
+bool dal_i2c_engine_acquire(
+ struct engine *engine,
+ struct ddc *ddc_handle)
+{
+ struct i2c_engine *i2c_engine = FROM_ENGINE(engine);
+
+ uint32_t counter = 0;
+ bool result;
+
+ do {
+ result = i2c_engine->funcs->acquire_engine(
+ i2c_engine, ddc_handle);
+
+ if (result)
+ break;
+
+ /* i2c_engine is busy by VBios, lets wait and retry */
+
+ dm_delay_in_microseconds(engine->ctx, 10);
+
+ ++counter;
+ } while (counter < 2);
+
+ if (result) {
+ if (!i2c_engine->funcs->setup_engine(i2c_engine)) {
+ engine->funcs->release_engine(engine);
+ result = false;
+ }
+ }
+
+ return result;
+}
+
+bool dal_i2c_engine_setup_i2c_engine(
+ struct i2c_engine *engine)
+{
+ /* Derivative classes do not have to override this */
+
+ return true;
+}
+
+void dal_i2c_engine_submit_channel_request(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *request)
+{
+
+}
+
+void dal_i2c_engine_process_channel_reply(
+ struct i2c_engine *engine,
+ struct i2c_reply_transaction_data *reply)
+{
+
+}
+
+bool dal_i2c_engine_construct(
+ struct i2c_engine *engine,
+ struct dc_context *ctx)
+{
+ if (!dal_i2caux_construct_engine(&engine->base, ctx))
+ return false;
+
+ engine->timeout_delay = 0;
+ return true;
+}
+
+void dal_i2c_engine_destruct(
+ struct i2c_engine *engine)
+{
+ dal_i2caux_destruct_engine(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.h
new file mode 100644
index 000000000000..20299fd08e9c
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_engine.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_ENGINE_H__
+#define __DAL_I2C_ENGINE_H__
+
+enum i2c_channel_operation_result {
+ I2C_CHANNEL_OPERATION_SUCCEEDED,
+ I2C_CHANNEL_OPERATION_FAILED,
+ I2C_CHANNEL_OPERATION_NOT_GRANTED,
+ I2C_CHANNEL_OPERATION_IS_BUSY,
+ I2C_CHANNEL_OPERATION_NO_HANDLE_PROVIDED,
+ I2C_CHANNEL_OPERATION_CHANNEL_IN_USE,
+ I2C_CHANNEL_OPERATION_CHANNEL_CLIENT_MAX_ALLOWED,
+ I2C_CHANNEL_OPERATION_ENGINE_BUSY,
+ I2C_CHANNEL_OPERATION_TIMEOUT,
+ I2C_CHANNEL_OPERATION_NO_RESPONSE,
+ I2C_CHANNEL_OPERATION_HW_REQUEST_I2C_BUS,
+ I2C_CHANNEL_OPERATION_WRONG_PARAMETER,
+ I2C_CHANNEL_OPERATION_OUT_NB_OF_RETRIES,
+ I2C_CHANNEL_OPERATION_NOT_STARTED
+};
+
+struct i2c_request_transaction_data {
+ enum i2caux_transaction_action action;
+ enum i2c_channel_operation_result status;
+ uint8_t address;
+ uint8_t length;
+ uint8_t *data;
+};
+
+struct i2c_reply_transaction_data {
+ uint8_t length;
+ uint8_t *data;
+};
+
+struct i2c_engine;
+
+struct i2c_engine_funcs {
+ void (*destroy)(
+ struct i2c_engine **ptr);
+ uint32_t (*get_speed)(
+ const struct i2c_engine *engine);
+ void (*set_speed)(
+ struct i2c_engine *engine,
+ uint32_t speed);
+ bool (*acquire_engine)(
+ struct i2c_engine *engine,
+ struct ddc *ddc);
+ bool (*setup_engine)(
+ struct i2c_engine *engine);
+ void (*submit_channel_request)(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *request);
+ void (*process_channel_reply)(
+ struct i2c_engine *engine,
+ struct i2c_reply_transaction_data *reply);
+ enum i2c_channel_operation_result (*get_channel_status)(
+ struct i2c_engine *engine,
+ uint8_t *returned_bytes);
+};
+
+struct i2c_engine {
+ struct engine base;
+ const struct i2c_engine_funcs *funcs;
+ uint32_t timeout_delay;
+};
+
+bool dal_i2c_engine_construct(
+ struct i2c_engine *engine,
+ struct dc_context *ctx);
+
+void dal_i2c_engine_destruct(
+ struct i2c_engine *engine);
+
+bool dal_i2c_engine_setup_i2c_engine(
+ struct i2c_engine *engine);
+
+void dal_i2c_engine_submit_channel_request(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *request);
+
+void dal_i2c_engine_process_channel_reply(
+ struct i2c_engine *engine,
+ struct i2c_reply_transaction_data *reply);
+
+bool dal_i2c_engine_acquire(
+ struct engine *ptr,
+ struct ddc *ddc_handle);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.c
new file mode 100644
index 000000000000..6429b55dd697
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.c
@@ -0,0 +1,286 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+#include "i2c_hw_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_generic_hw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_hw_engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_I2C_HW_ENGINE(ptr) \
+ container_of((ptr), struct i2c_generic_hw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+ FROM_I2C_HW_ENGINE(container_of((ptr), struct i2c_hw_engine, base))
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_generic_hw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_generic_hw_engine_get_engine_type(
+ const struct engine *engine)
+{
+ return I2CAUX_ENGINE_TYPE_I2C_GENERIC_HW;
+}
+
+/*
+ * @brief
+ * Single transaction handling.
+ * Since transaction may be bigger than HW buffer size,
+ * it divides transaction to sub-transactions
+ * and uses batch transaction feature of the engine.
+ */
+bool dal_i2c_generic_hw_engine_submit_request(
+ struct engine *engine,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction)
+{
+ struct i2c_generic_hw_engine *hw_engine = FROM_ENGINE(engine);
+
+ struct i2c_hw_engine *base = &hw_engine->base;
+
+ uint8_t max_payload_size =
+ base->funcs->get_hw_buffer_available_size(base);
+
+ bool initial_stop_bit = !middle_of_transaction;
+
+ struct i2c_generic_transaction_attributes attributes;
+
+ enum i2c_channel_operation_result operation_result =
+ I2C_CHANNEL_OPERATION_FAILED;
+
+ bool result = false;
+
+ /* setup transaction initial properties */
+
+ uint8_t address = i2caux_request->payload.address;
+ uint8_t *current_payload = i2caux_request->payload.data;
+ uint8_t remaining_payload_size = i2caux_request->payload.length;
+
+ bool first_iteration = true;
+
+ if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+ attributes.action = I2CAUX_TRANSACTION_ACTION_I2C_READ;
+ else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+ attributes.action = I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+ else {
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+ return false;
+ }
+
+ /* Do batch transaction.
+ * Divide read/write data into payloads which fit HW buffer size.
+ * 1. Single transaction:
+ * start_bit = 1, stop_bit depends on session state, ack_on_read = 0;
+ * 2. Start of batch transaction:
+ * start_bit = 1, stop_bit = 0, ack_on_read = 1;
+ * 3. Middle of batch transaction:
+ * start_bit = 0, stop_bit = 0, ack_on_read = 1;
+ * 4. End of batch transaction:
+ * start_bit = 0, stop_bit depends on session state, ack_on_read = 0.
+ * Session stop bit is set if 'middle_of_transaction' = 0. */
+
+ while (remaining_payload_size) {
+ uint8_t current_transaction_size;
+ uint8_t current_payload_size;
+
+ bool last_iteration;
+ bool stop_bit;
+
+ /* Calculate current transaction size and payload size.
+ * Transaction size = total number of bytes in transaction,
+ * including slave's address;
+ * Payload size = number of data bytes in transaction. */
+
+ if (first_iteration) {
+ /* In the first sub-transaction we send slave's address
+ * thus we need to reserve one byte for it */
+ current_transaction_size =
+ (remaining_payload_size > max_payload_size - 1) ?
+ max_payload_size :
+ remaining_payload_size + 1;
+
+ current_payload_size = current_transaction_size - 1;
+ } else {
+ /* Second and further sub-transactions will have
+ * entire buffer reserved for data */
+ current_transaction_size =
+ (remaining_payload_size > max_payload_size) ?
+ max_payload_size :
+ remaining_payload_size;
+
+ current_payload_size = current_transaction_size;
+ }
+
+ last_iteration =
+ (remaining_payload_size == current_payload_size);
+
+ stop_bit = last_iteration ? initial_stop_bit : false;
+
+ /* write slave device address */
+
+ if (first_iteration)
+ hw_engine->funcs->write_address(hw_engine, address);
+
+ /* write current portion of data, if requested */
+
+ if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+ hw_engine->funcs->write_data(
+ hw_engine,
+ current_payload,
+ current_payload_size);
+
+ /* execute transaction */
+
+ attributes.start_bit = first_iteration;
+ attributes.stop_bit = stop_bit;
+ attributes.last_read = last_iteration;
+ attributes.transaction_size = current_transaction_size;
+
+ hw_engine->funcs->execute_transaction(hw_engine, &attributes);
+
+ /* wait until transaction is processed; if it fails - quit */
+
+ operation_result = base->funcs->wait_on_operation_result(
+ base,
+ base->funcs->get_transaction_timeout(
+ base, current_transaction_size),
+ I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+
+ if (operation_result != I2C_CHANNEL_OPERATION_SUCCEEDED)
+ break;
+
+ /* read current portion of data, if requested */
+
+ /* the read offset should be 1 for first sub-transaction,
+ * and 0 for any next one */
+
+ if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+ hw_engine->funcs->read_data(hw_engine, current_payload,
+ current_payload_size, first_iteration ? 1 : 0);
+
+ /* update loop variables */
+
+ first_iteration = false;
+ current_payload += current_payload_size;
+ remaining_payload_size -= current_payload_size;
+ }
+
+ /* update transaction status */
+
+ switch (operation_result) {
+ case I2C_CHANNEL_OPERATION_SUCCEEDED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+ result = true;
+ break;
+ case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+ break;
+ case I2C_CHANNEL_OPERATION_TIMEOUT:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ break;
+ case I2C_CHANNEL_OPERATION_FAILED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+ break;
+ default:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+ }
+
+ return result;
+}
+
+/*
+ * @brief
+ * Returns number of microseconds to wait until timeout to be considered
+ */
+uint32_t dal_i2c_generic_hw_engine_get_transaction_timeout(
+ const struct i2c_hw_engine *engine,
+ uint32_t length)
+{
+ const struct i2c_engine *base = &engine->base;
+
+ uint32_t speed = base->funcs->get_speed(base);
+
+ if (!speed)
+ return 0;
+
+ /* total timeout = period_timeout * (start + data bits count + stop) */
+
+ return ((1000 * TRANSACTION_TIMEOUT_IN_I2C_CLOCKS) / speed) *
+ (1 + (length << 3) + 1);
+}
+
+bool dal_i2c_generic_hw_engine_construct(
+ struct i2c_generic_hw_engine *engine,
+ struct dc_context *ctx)
+{
+ if (!dal_i2c_hw_engine_construct(&engine->base, ctx))
+ return false;
+ return true;
+}
+
+void dal_i2c_generic_hw_engine_destruct(
+ struct i2c_generic_hw_engine *engine)
+{
+ dal_i2c_hw_engine_destruct(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.h
new file mode 100644
index 000000000000..52f2aa248d95
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_generic_hw_engine.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_GENERIC_HW_ENGINE_H__
+#define __DAL_I2C_GENERIC_HW_ENGINE_H__
+
+struct i2c_generic_transaction_attributes {
+ enum i2caux_transaction_action action;
+ uint8_t transaction_size;
+ bool start_bit;
+ bool stop_bit;
+ bool last_read;
+};
+
+struct i2c_generic_hw_engine;
+
+struct i2c_generic_hw_engine_funcs {
+ void (*write_address)(
+ struct i2c_generic_hw_engine *engine,
+ uint8_t address);
+ void (*write_data)(
+ struct i2c_generic_hw_engine *engine,
+ const uint8_t *buffer,
+ uint8_t length);
+ void (*read_data)(
+ struct i2c_generic_hw_engine *engine,
+ uint8_t *buffer,
+ uint8_t length,
+ uint32_t offset);
+ void (*execute_transaction)(
+ struct i2c_generic_hw_engine *engine,
+ struct i2c_generic_transaction_attributes *attributes);
+};
+
+struct i2c_generic_hw_engine {
+ struct i2c_hw_engine base;
+ const struct i2c_generic_hw_engine_funcs *funcs;
+};
+
+bool dal_i2c_generic_hw_engine_construct(
+ struct i2c_generic_hw_engine *engine,
+ struct dc_context *ctx);
+
+void dal_i2c_generic_hw_engine_destruct(
+ struct i2c_generic_hw_engine *engine);
+enum i2caux_engine_type dal_i2c_generic_hw_engine_get_engine_type(
+ const struct engine *engine);
+bool dal_i2c_generic_hw_engine_submit_request(
+ struct engine *ptr,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction);
+uint32_t dal_i2c_generic_hw_engine_get_transaction_timeout(
+ const struct i2c_hw_engine *engine,
+ uint32_t length);
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.c
new file mode 100644
index 000000000000..b02ba7927d5b
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.c
@@ -0,0 +1,246 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_hw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_hw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+ container_of((ptr), struct i2c_hw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_hw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type(
+ const struct engine *engine)
+{
+ return I2CAUX_ENGINE_TYPE_I2C_DDC_HW;
+}
+
+bool dal_i2c_hw_engine_submit_request(
+ struct engine *engine,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction)
+{
+ struct i2c_hw_engine *hw_engine = FROM_ENGINE(engine);
+
+ struct i2c_request_transaction_data request;
+
+ uint32_t transaction_timeout;
+
+ enum i2c_channel_operation_result operation_result;
+
+ bool result = false;
+
+ /* We need following:
+ * transaction length will not exceed
+ * the number of free bytes in HW buffer (minus one for address)*/
+
+ if (i2caux_request->payload.length >=
+ hw_engine->funcs->get_hw_buffer_available_size(hw_engine)) {
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW;
+ return false;
+ }
+
+ if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+ request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_READ;
+ else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+ request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+ else {
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+ /* [anaumov] in DAL2, there was no "return false" */
+ return false;
+ }
+
+ request.address = (uint8_t)i2caux_request->payload.address;
+ request.length = i2caux_request->payload.length;
+ request.data = i2caux_request->payload.data;
+
+ /* obtain timeout value before submitting request */
+
+ transaction_timeout = hw_engine->funcs->get_transaction_timeout(
+ hw_engine, i2caux_request->payload.length + 1);
+
+ hw_engine->base.funcs->submit_channel_request(
+ &hw_engine->base, &request);
+
+ if ((request.status == I2C_CHANNEL_OPERATION_FAILED) ||
+ (request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY)) {
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
+ return false;
+ }
+
+ /* wait until transaction proceed */
+
+ operation_result = hw_engine->funcs->wait_on_operation_result(
+ hw_engine,
+ transaction_timeout,
+ I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+
+ /* update transaction status */
+
+ switch (operation_result) {
+ case I2C_CHANNEL_OPERATION_SUCCEEDED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+ result = true;
+ break;
+ case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+ break;
+ case I2C_CHANNEL_OPERATION_TIMEOUT:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ break;
+ case I2C_CHANNEL_OPERATION_FAILED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+ break;
+ default:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+ }
+
+ if (result && (i2caux_request->operation == I2CAUX_TRANSACTION_READ)) {
+ struct i2c_reply_transaction_data reply;
+
+ reply.data = i2caux_request->payload.data;
+ reply.length = i2caux_request->payload.length;
+
+ hw_engine->base.funcs->
+ process_channel_reply(&hw_engine->base, &reply);
+ }
+
+ return result;
+}
+
+bool dal_i2c_hw_engine_acquire_engine(
+ struct i2c_engine *engine,
+ struct ddc *ddc)
+{
+ enum gpio_result result;
+ uint32_t current_speed;
+
+ result = dal_ddc_open(ddc, GPIO_MODE_HARDWARE,
+ GPIO_DDC_CONFIG_TYPE_MODE_I2C);
+
+ if (result != GPIO_RESULT_OK)
+ return false;
+
+ engine->base.ddc = ddc;
+
+ current_speed = engine->funcs->get_speed(engine);
+
+ if (current_speed)
+ FROM_I2C_ENGINE(engine)->original_speed = current_speed;
+
+ return true;
+}
+/*
+ * @brief
+ * Queries in a loop for current engine status
+ * until retrieved status matches 'expected_result', or timeout occurs.
+ * Timeout given in microseconds
+ * and the status query frequency is also one per microsecond.
+ */
+enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result(
+ struct i2c_hw_engine *engine,
+ uint32_t timeout,
+ enum i2c_channel_operation_result expected_result)
+{
+ enum i2c_channel_operation_result result;
+ uint32_t i = 0;
+
+ if (!timeout)
+ return I2C_CHANNEL_OPERATION_SUCCEEDED;
+
+ do {
+ result = engine->base.funcs->get_channel_status(
+ &engine->base, NULL);
+
+ if (result != expected_result)
+ break;
+
+ dm_delay_in_microseconds(engine->base.base.ctx, 1);
+
+ ++i;
+ } while (i < timeout);
+
+ return result;
+}
+
+bool dal_i2c_hw_engine_construct(
+ struct i2c_hw_engine *engine,
+ struct dc_context *ctx)
+{
+ if (!dal_i2c_engine_construct(&engine->base, ctx))
+ return false;
+ engine->original_speed = I2CAUX_DEFAULT_I2C_HW_SPEED;
+ engine->default_speed = I2CAUX_DEFAULT_I2C_HW_SPEED;
+ return true;
+}
+
+void dal_i2c_hw_engine_destruct(
+ struct i2c_hw_engine *engine)
+{
+ dal_i2c_engine_destruct(&engine->base);
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.h
new file mode 100644
index 000000000000..5afbd7067a1f
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_hw_engine.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_HW_ENGINE_H__
+#define __DAL_I2C_HW_ENGINE_H__
+
+enum {
+ TRANSACTION_TIMEOUT_IN_I2C_CLOCKS = 32
+};
+
+struct i2c_hw_engine;
+
+struct i2c_hw_engine_funcs {
+ uint8_t (*get_hw_buffer_available_size)(
+ const struct i2c_hw_engine *engine);
+ enum i2c_channel_operation_result (*wait_on_operation_result)(
+ struct i2c_hw_engine *engine,
+ uint32_t timeout,
+ enum i2c_channel_operation_result expected_result);
+ uint32_t (*get_transaction_timeout)(
+ const struct i2c_hw_engine *engine,
+ uint32_t length);
+};
+
+struct i2c_hw_engine {
+ struct i2c_engine base;
+ const struct i2c_hw_engine_funcs *funcs;
+
+ /* Values below are in kilohertz */
+ uint32_t original_speed;
+ uint32_t default_speed;
+};
+
+bool dal_i2c_hw_engine_construct(
+ struct i2c_hw_engine *engine,
+ struct dc_context *ctx);
+
+void dal_i2c_hw_engine_destruct(
+ struct i2c_hw_engine *engine);
+
+enum i2c_channel_operation_result dal_i2c_hw_engine_wait_on_operation_result(
+ struct i2c_hw_engine *engine,
+ uint32_t timeout,
+ enum i2c_channel_operation_result expected_result);
+
+bool dal_i2c_hw_engine_acquire_engine(
+ struct i2c_engine *engine,
+ struct ddc *ddc);
+
+bool dal_i2c_hw_engine_submit_request(
+ struct engine *ptr,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction);
+
+enum i2caux_engine_type dal_i2c_hw_engine_get_engine_type(
+ const struct engine *engine);
+
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.c
new file mode 100644
index 000000000000..21e8fa2c08ee
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.c
@@ -0,0 +1,614 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+#include "i2c_engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_sw_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+#define SCL false
+#define SDA true
+
+static inline bool read_bit_from_ddc(
+ struct ddc *ddc,
+ bool data_nor_clock)
+{
+ uint32_t value = 0;
+
+ if (data_nor_clock)
+ dal_ddc_get_data(ddc, &value);
+ else
+ dal_ddc_get_clock(ddc, &value);
+
+ return (value != 0);
+}
+
+static inline void write_bit_to_ddc(
+ struct ddc *ddc,
+ bool data_nor_clock,
+ bool bit)
+{
+ uint32_t value = bit ? 1 : 0;
+
+ if (data_nor_clock)
+ dal_ddc_set_data(ddc, value);
+ else
+ dal_ddc_set_clock(ddc, value);
+}
+
+static bool wait_for_scl_high(
+ struct dc_context *ctx,
+ struct ddc *ddc,
+ uint16_t clock_delay_div_4)
+{
+ uint32_t scl_retry = 0;
+ uint32_t scl_retry_max = I2C_SW_TIMEOUT_DELAY / clock_delay_div_4;
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ /* 3 milliseconds delay
+ * to wake up some displays from "low power" state.
+ */
+
+ do {
+ if (read_bit_from_ddc(ddc, SCL))
+ return true;
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ ++scl_retry;
+ } while (scl_retry <= scl_retry_max);
+
+ return false;
+}
+
+static bool start_sync(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4)
+{
+ uint32_t retry = 0;
+
+ /* The I2C communications start signal is:
+ * the SDA going low from high, while the SCL is high. */
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ do {
+ write_bit_to_ddc(ddc_handle, SDA, true);
+
+ if (!read_bit_from_ddc(ddc_handle, SDA)) {
+ ++retry;
+ continue;
+ }
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ break;
+
+ write_bit_to_ddc(ddc_handle, SDA, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ return true;
+ } while (retry <= I2C_SW_RETRIES);
+
+ return false;
+}
+
+static bool stop_sync(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4)
+{
+ uint32_t retry = 0;
+
+ /* The I2C communications stop signal is:
+ * the SDA going high from low, while the SCL is high. */
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SDA, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ return false;
+
+ write_bit_to_ddc(ddc_handle, SDA, true);
+
+ do {
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ if (read_bit_from_ddc(ddc_handle, SDA))
+ return true;
+
+ ++retry;
+ } while (retry <= 2);
+
+ return false;
+}
+
+static bool write_byte(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4,
+ uint8_t byte)
+{
+ int32_t shift = 7;
+ bool ack;
+
+ /* bits are transmitted serially, starting from MSB */
+
+ do {
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SDA, (byte >> shift) & 1);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ return false;
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ --shift;
+ } while (shift >= 0);
+
+ /* The display sends ACK by preventing the SDA from going high
+ * after the SCL pulse we use to send our last data bit.
+ * If the SDA goes high after that bit, it's a NACK */
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SDA, true);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ return false;
+
+ /* read ACK bit */
+
+ ack = !read_bit_from_ddc(ddc_handle, SDA);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4 << 1);
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4 << 1);
+
+ return ack;
+}
+
+static bool read_byte(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4,
+ uint8_t *byte,
+ bool more)
+{
+ int32_t shift = 7;
+
+ uint8_t data = 0;
+
+ /* The data bits are read from MSB to LSB;
+ * bit is read while SCL is high */
+
+ do {
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ return false;
+
+ if (read_bit_from_ddc(ddc_handle, SDA))
+ data |= (1 << shift);
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4 << 1);
+
+ --shift;
+ } while (shift >= 0);
+
+ /* read only whole byte */
+
+ *byte = data;
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ /* send the acknowledge bit:
+ * SDA low means ACK, SDA high means NACK */
+
+ write_bit_to_ddc(ddc_handle, SDA, !more);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SCL, true);
+
+ if (!wait_for_scl_high(ctx, ddc_handle, clock_delay_div_4))
+ return false;
+
+ write_bit_to_ddc(ddc_handle, SCL, false);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ write_bit_to_ddc(ddc_handle, SDA, true);
+
+ dm_delay_in_microseconds(ctx, clock_delay_div_4);
+
+ return true;
+}
+
+static bool i2c_write(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4,
+ uint8_t address,
+ uint8_t length,
+ const uint8_t *data)
+{
+ uint32_t i = 0;
+
+ if (!write_byte(ctx, ddc_handle, clock_delay_div_4, address))
+ return false;
+
+ while (i < length) {
+ if (!write_byte(ctx, ddc_handle, clock_delay_div_4, data[i]))
+ return false;
+ ++i;
+ }
+
+ return true;
+}
+
+static bool i2c_read(
+ struct dc_context *ctx,
+ struct ddc *ddc_handle,
+ uint16_t clock_delay_div_4,
+ uint8_t address,
+ uint8_t length,
+ uint8_t *data)
+{
+ uint32_t i = 0;
+
+ if (!write_byte(ctx, ddc_handle, clock_delay_div_4, address))
+ return false;
+
+ while (i < length) {
+ if (!read_byte(ctx, ddc_handle, clock_delay_div_4, data + i,
+ i < length - 1))
+ return false;
+ ++i;
+ }
+
+ return true;
+}
+
+/*
+ * @brief
+ * Cast 'struct i2c_engine *'
+ * to 'struct i2c_sw_engine *'
+ */
+#define FROM_I2C_ENGINE(ptr) \
+ container_of((ptr), struct i2c_sw_engine, base)
+
+/*
+ * @brief
+ * Cast 'struct engine *'
+ * to 'struct i2c_sw_engine *'
+ */
+#define FROM_ENGINE(ptr) \
+ FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
+
+enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type(
+ const struct engine *engine)
+{
+ return I2CAUX_ENGINE_TYPE_I2C_SW;
+}
+
+bool dal_i2c_sw_engine_submit_request(
+ struct engine *engine,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction)
+{
+ struct i2c_sw_engine *sw_engine = FROM_ENGINE(engine);
+
+ struct i2c_engine *base = &sw_engine->base;
+
+ struct i2c_request_transaction_data request;
+ bool operation_succeeded = false;
+
+ if (i2caux_request->operation == I2CAUX_TRANSACTION_READ)
+ request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_READ;
+ else if (i2caux_request->operation == I2CAUX_TRANSACTION_WRITE)
+ request.action = middle_of_transaction ?
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT :
+ I2CAUX_TRANSACTION_ACTION_I2C_WRITE;
+ else {
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
+ /* in DAL2, there was no "return false" */
+ return false;
+ }
+
+ request.address = (uint8_t)i2caux_request->payload.address;
+ request.length = i2caux_request->payload.length;
+ request.data = i2caux_request->payload.data;
+
+ base->funcs->submit_channel_request(base, &request);
+
+ if ((request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY) ||
+ (request.status == I2C_CHANNEL_OPERATION_FAILED))
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
+ else {
+ enum i2c_channel_operation_result operation_result;
+
+ do {
+ operation_result =
+ base->funcs->get_channel_status(base, NULL);
+
+ switch (operation_result) {
+ case I2C_CHANNEL_OPERATION_SUCCEEDED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_SUCCEEDED;
+ operation_succeeded = true;
+ break;
+ case I2C_CHANNEL_OPERATION_NO_RESPONSE:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_NACK;
+ break;
+ case I2C_CHANNEL_OPERATION_TIMEOUT:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_TIMEOUT;
+ break;
+ case I2C_CHANNEL_OPERATION_FAILED:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_INCOMPLETE;
+ break;
+ default:
+ i2caux_request->status =
+ I2CAUX_TRANSACTION_STATUS_FAILED_OPERATION;
+ break;
+ }
+ } while (operation_result == I2C_CHANNEL_OPERATION_ENGINE_BUSY);
+ }
+
+ return operation_succeeded;
+}
+
+uint32_t dal_i2c_sw_engine_get_speed(
+ const struct i2c_engine *engine)
+{
+ return FROM_I2C_ENGINE(engine)->speed;
+}
+
+void dal_i2c_sw_engine_set_speed(
+ struct i2c_engine *engine,
+ uint32_t speed)
+{
+ struct i2c_sw_engine *sw_engine = FROM_I2C_ENGINE(engine);
+
+ ASSERT(speed);
+
+ sw_engine->speed = speed ? speed : I2CAUX_DEFAULT_I2C_SW_SPEED;
+
+ sw_engine->clock_delay = 1000 / sw_engine->speed;
+
+ if (sw_engine->clock_delay < 12)
+ sw_engine->clock_delay = 12;
+}
+
+bool dal_i2caux_i2c_sw_engine_acquire_engine(
+ struct i2c_engine *engine,
+ struct ddc *ddc)
+{
+ enum gpio_result result;
+
+ result = dal_ddc_open(ddc, GPIO_MODE_FAST_OUTPUT,
+ GPIO_DDC_CONFIG_TYPE_MODE_I2C);
+
+ if (result != GPIO_RESULT_OK)
+ return false;
+
+ engine->base.ddc = ddc;
+
+ return true;
+}
+
+void dal_i2c_sw_engine_submit_channel_request(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *req)
+{
+ struct i2c_sw_engine *sw_engine = FROM_I2C_ENGINE(engine);
+
+ struct ddc *ddc = engine->base.ddc;
+ uint16_t clock_delay_div_4 = sw_engine->clock_delay >> 2;
+
+ /* send sync (start / repeated start) */
+
+ bool result = start_sync(engine->base.ctx, ddc, clock_delay_div_4);
+
+ /* process payload */
+
+ if (result) {
+ switch (req->action) {
+ case I2CAUX_TRANSACTION_ACTION_I2C_WRITE:
+ case I2CAUX_TRANSACTION_ACTION_I2C_WRITE_MOT:
+ result = i2c_write(engine->base.ctx, ddc,
clock_delay_div_4,
+ req->address, req->length, req->data);
+ break;
+ case I2CAUX_TRANSACTION_ACTION_I2C_READ:
+ case I2CAUX_TRANSACTION_ACTION_I2C_READ_MOT:
+ result = i2c_read(engine->base.ctx, ddc,
clock_delay_div_4,
+ req->address, req->length, req->data);
+ break;
+ default:
+ result = false;
+ break;
+ }
+ }
+
+ /* send stop if not 'mot' or operation failed */
+
+ if (!result ||
+ (req->action == I2CAUX_TRANSACTION_ACTION_I2C_WRITE) ||
+ (req->action == I2CAUX_TRANSACTION_ACTION_I2C_READ))
+ if (!stop_sync(engine->base.ctx, ddc, clock_delay_div_4))
+ result = false;
+
+ req->status = result ?
+ I2C_CHANNEL_OPERATION_SUCCEEDED :
+ I2C_CHANNEL_OPERATION_FAILED;
+}
+
+enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status(
+ struct i2c_engine *engine,
+ uint8_t *returned_bytes)
+{
+ return dal_ddc_check_line_aborted(engine->base.ddc) ?
+ I2C_CHANNEL_OPERATION_FAILED :
+ I2C_CHANNEL_OPERATION_SUCCEEDED;
+}
+
+void dal_i2c_sw_engine_destruct(
+ struct i2c_sw_engine *engine)
+{
+ dal_i2c_engine_destruct(&engine->base);
+}
+
+static void destroy(
+ struct i2c_engine **ptr)
+{
+ dal_i2c_sw_engine_destruct(FROM_I2C_ENGINE(*ptr));
+
+ dm_free((*ptr)->base.ctx, *ptr);
+ *ptr = NULL;
+}
+
+static const struct i2c_engine_funcs i2c_engine_funcs = {
+ .acquire_engine = dal_i2caux_i2c_sw_engine_acquire_engine,
+ .destroy = destroy,
+ .get_speed = dal_i2c_sw_engine_get_speed,
+ .set_speed = dal_i2c_sw_engine_set_speed,
+ .setup_engine = dal_i2c_engine_setup_i2c_engine,
+ .submit_channel_request = dal_i2c_sw_engine_submit_channel_request,
+ .process_channel_reply = dal_i2c_engine_process_channel_reply,
+ .get_channel_status = dal_i2c_sw_engine_get_channel_status,
+};
+
+static void release_engine(
+ struct engine *engine)
+{
+
+}
+
+static const struct engine_funcs engine_funcs = {
+ .release_engine = release_engine,
+ .get_engine_type = dal_i2c_sw_engine_get_engine_type,
+ .acquire = dal_i2c_engine_acquire,
+ .submit_request = dal_i2c_sw_engine_submit_request,
+ .keep_power_up_count = dal_i2caux_keep_power_up_count,
+};
+
+bool dal_i2c_sw_engine_construct(
+ struct i2c_sw_engine *engine,
+ const struct i2c_sw_engine_create_arg *arg)
+{
+ if (!dal_i2c_engine_construct(&engine->base, arg->ctx))
+ return false;
+
+ dal_i2c_sw_engine_set_speed(&engine->base, arg->default_speed);
+ engine->base.funcs = &i2c_engine_funcs;
+ engine->base.base.funcs = &engine_funcs;
+ return true;
+}
+
+
+
+struct i2c_engine *dal_i2c_sw_engine_create(
+ const struct i2c_sw_engine_create_arg *arg)
+{
+ struct i2c_sw_engine *engine;
+
+ if (!arg) {
+ BREAK_TO_DEBUGGER();
+ return NULL;
+ }
+
+ engine = dm_alloc(arg->ctx, sizeof(struct i2c_sw_engine));
+
+ if (!engine) {
+ BREAK_TO_DEBUGGER();
+ return NULL;
+ }
+
+ if (dal_i2c_sw_engine_construct(engine, arg))
+ return &engine->base;
+
+ BREAK_TO_DEBUGGER();
+
+ dm_free(arg->ctx, engine);
+
+ return NULL;
+}
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.h
new file mode 100644
index 000000000000..e0cb4c3d483d
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2c_sw_engine.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_SW_ENGINE_H__
+#define __DAL_I2C_SW_ENGINE_H__
+
+enum {
+ I2C_SW_RETRIES = 10,
+ I2C_SW_SCL_READ_RETRIES = 128,
+ /* following value is in microseconds */
+ I2C_SW_TIMEOUT_DELAY = 3000
+};
+
+struct i2c_sw_engine;
+
+struct i2c_sw_engine {
+ struct i2c_engine base;
+ uint32_t clock_delay;
+ /* Values below are in KHz */
+ uint32_t speed;
+ uint32_t default_speed;
+};
+
+struct i2c_sw_engine_create_arg {
+ uint32_t default_speed;
+ struct dc_context *ctx;
+};
+
+bool dal_i2c_sw_engine_construct(
+ struct i2c_sw_engine *engine,
+ const struct i2c_sw_engine_create_arg *arg);
+
+bool dal_i2caux_i2c_sw_engine_acquire_engine(
+ struct i2c_engine *engine,
+ struct ddc *ddc_handle);
+
+void dal_i2c_sw_engine_destruct(
+ struct i2c_sw_engine *engine);
+
+struct i2c_engine *dal_i2c_sw_engine_create(
+ const struct i2c_sw_engine_create_arg *arg);
+enum i2caux_engine_type dal_i2c_sw_engine_get_engine_type(
+ const struct engine *engine);
+bool dal_i2c_sw_engine_submit_request(
+ struct engine *ptr,
+ struct i2caux_transaction_request *i2caux_request,
+ bool middle_of_transaction);
+uint32_t dal_i2c_sw_engine_get_speed(
+ const struct i2c_engine *engine);
+void dal_i2c_sw_engine_set_speed(
+ struct i2c_engine *ptr,
+ uint32_t speed);
+void dal_i2c_sw_engine_submit_channel_request(
+ struct i2c_engine *ptr,
+ struct i2c_request_transaction_data *req);
+enum i2c_channel_operation_result dal_i2c_sw_engine_get_channel_status(
+ struct i2c_engine *engine,
+ uint8_t *returned_bytes);
+#endif
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.c
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.c
new file mode 100644
index 000000000000..4c2f2cb64315
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.c
@@ -0,0 +1,529 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#include "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2caux.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+#include "engine.h"
+#include "i2c_engine.h"
+#include "aux_engine.h"
+
+/*
+ * This unit
+ */
+
+#if defined(CONFIG_DRM_AMD_DAL_DCE11_0) || defined(CONFIG_DRM_AMD_DAL_DCE10_0)
+#include "dce110/i2caux_dce110.h"
+#endif
+
+#include "diagnostics/i2caux_diag.h"
+
+/*
+ * @brief
+ * Plain API, available publicly
+ */
+
+struct i2caux *dal_i2caux_create(
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ enum dce_version dce_version;
+ enum dce_environment dce_environment;
+
+ if (!as) {
+ BREAK_TO_DEBUGGER();
+ return NULL;
+ }
+
+ dce_version = dal_adapter_service_get_dce_version(as);
+ dce_environment = dal_adapter_service_get_dce_environment(as);
+
+ if (IS_FPGA_MAXIMUS_DC(dce_environment)) {
+ return dal_i2caux_diag_fpga_create(as, ctx);
+ }
+
+ switch (dce_version) {
+#if defined(CONFIG_DRM_AMD_DAL_DCE11_0)
+#if defined(CONFIG_DRM_AMD_DAL_DCE10_0)
+ case DCE_VERSION_10_0:
+#endif
+ case DCE_VERSION_11_0:
+ return dal_i2caux_dce110_create(as, ctx);
+#endif
+ default:
+ BREAK_TO_DEBUGGER();
+ return NULL;
+ }
+}
+
+bool dal_i2caux_submit_i2c_command(
+ struct i2caux *i2caux,
+ struct ddc *ddc,
+ struct i2c_command *cmd)
+{
+ struct i2c_engine *engine;
+ uint8_t index_of_payload = 0;
+ bool result;
+
+ if (!ddc) {
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ if (!cmd) {
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ switch (cmd->engine) {
+ case I2C_COMMAND_ENGINE_SW:
+ /* try to acquire SW engine first,
+ * acquire HW engine if SW engine not available */
+ engine = i2caux->funcs->acquire_i2c_sw_engine(i2caux, ddc);
+
+ if (!engine)
+ engine = i2caux->funcs->acquire_i2c_hw_engine(
+ i2caux, ddc);
+ break;
+ case I2C_COMMAND_ENGINE_HW:
+ case I2C_COMMAND_ENGINE_DEFAULT:
+ default:
+ /* try to acquire HW engine first,
+ * acquire SW engine if HW engine not available */
+ engine = i2caux->funcs->acquire_i2c_hw_engine(i2caux, ddc);
+
+ if (!engine)
+ engine = i2caux->funcs->acquire_i2c_sw_engine(
+ i2caux, ddc);
+ }
+
+ if (!engine)
+ return false;
+
+ engine->funcs->set_speed(engine, cmd->speed);
+
+ result = true;
+
+ while (index_of_payload < cmd->number_of_payloads) {
+ bool mot = (index_of_payload != cmd->number_of_payloads - 1);
+
+ struct i2c_payload *payload = cmd->payloads + index_of_payload;
+
+ struct i2caux_transaction_request request = { 0 };
+
+ request.operation = payload->write ?
+ I2CAUX_TRANSACTION_WRITE :
+ I2CAUX_TRANSACTION_READ;
+
+ request.payload.address_space =
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C;
+ request.payload.address = (payload->address << 1) |
+ !payload->write;
+ request.payload.length = payload->length;
+ request.payload.data = payload->data;
+
+ if (!engine->base.funcs->submit_request(
+ &engine->base, &request, mot)) {
+ result = false;
+ break;
+ }
+
+ ++index_of_payload;
+ }
+
+ i2caux->funcs->release_engine(i2caux, &engine->base);
+
+ return result;
+}
+
+bool dal_i2caux_submit_aux_command(
+ struct i2caux *i2caux,
+ struct ddc *ddc,
+ struct aux_command *cmd)
+{
+ struct aux_engine *engine;
+ uint8_t index_of_payload = 0;
+ bool result;
+
+ if (!ddc) {
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ if (!cmd) {
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ engine = i2caux->funcs->acquire_aux_engine(i2caux, ddc);
+
+ if (!engine)
+ return false;
+
+ engine->delay = cmd->defer_delay;
+ engine->max_defer_write_retry = cmd->max_defer_write_retry;
+
+ result = true;
+
+ while (index_of_payload < cmd->number_of_payloads) {
+ bool mot = (index_of_payload != cmd->number_of_payloads - 1);
+
+ struct aux_payload *payload = cmd->payloads + index_of_payload;
+
+ struct i2caux_transaction_request request = { 0 };
+
+ request.operation = payload->write ?
+ I2CAUX_TRANSACTION_WRITE :
+ I2CAUX_TRANSACTION_READ;
+
+ if (payload->i2c_over_aux) {
+ request.payload.address_space =
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_I2C;
+
+ request.payload.address = (payload->address << 1) |
+ !payload->write;
+ } else {
+ request.payload.address_space =
+ I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD;
+
+ request.payload.address = payload->address;
+ }
+
+ request.payload.length = payload->length;
+ request.payload.data = payload->data;
+
+ if (!engine->base.funcs->submit_request(
+ &engine->base, &request, mot)) {
+ result = false;
+ break;
+ }
+
+ ++index_of_payload;
+ }
+
+ i2caux->funcs->release_engine(i2caux, &engine->base);
+
+ return result;
+}
+
+static bool get_hw_supported_ddc_line(
+ struct ddc *ddc,
+ enum gpio_ddc_line *line)
+{
+ enum gpio_ddc_line line_found;
+
+ if (!ddc) {
+ BREAK_TO_DEBUGGER();
+ return false;
+ }
+
+ if (!dal_ddc_is_hw_supported(ddc))
+ return false;
+
+ line_found = dal_ddc_get_line(ddc);
+
+ if (line_found >= GPIO_DDC_LINE_COUNT)
+ return false;
+
+ *line = line_found;
+
+ return true;
+}
+
+void dal_i2caux_keep_engine_power_up(
+ struct i2caux *i2caux,
+ struct ddc *ddc,
+ bool keep_power_up)
+{
+ enum gpio_ddc_line line;
+ struct i2c_engine *engine;
+
+ if (!get_hw_supported_ddc_line(ddc, &line))
+ return;
+
+ engine = i2caux->i2c_hw_engines[line];
+
+ engine->base.funcs->keep_power_up_count(&engine->base, keep_power_up);
+}
+
+bool dal_i2caux_start_gtc_sync(
+ struct i2caux *i2caux,
+ struct ddc *ddc)
+{
+ enum gpio_ddc_line line;
+
+ struct aux_engine *engine;
+
+ bool result;
+
+ if (!get_hw_supported_ddc_line(ddc, &line))
+ return false;
+
+ engine = i2caux->aux_engines[line];
+
+ if (!engine)
+ return false;
+
+ if (!engine->base.funcs->acquire(&engine->base, ddc))
+ return false;
+
+ result = engine->funcs->start_gtc_sync(engine);
+
+ i2caux->funcs->release_engine(i2caux, &engine->base);
+
+ return result;
+}
+
+bool dal_i2caux_stop_gtc_sync(
+ struct i2caux *i2caux,
+ struct ddc *ddc)
+{
+ enum gpio_ddc_line line;
+
+ struct aux_engine *engine;
+
+ if (!get_hw_supported_ddc_line(ddc, &line))
+ return false;
+
+ engine = i2caux->aux_engines[line];
+
+ if (!engine)
+ return false;
+
+ if (!engine->base.funcs->acquire(&engine->base, ddc))
+ return false;
+
+ engine->funcs->stop_gtc_sync(engine);
+
+ i2caux->funcs->release_engine(i2caux, &engine->base);
+
+ return true;
+}
+
+void dal_i2caux_configure_aux(
+ struct i2caux *i2caux,
+ struct ddc *ddc,
+ union aux_config cfg)
+{
+ struct aux_engine *engine =
+ i2caux->funcs->acquire_aux_engine(i2caux, ddc);
+
+ if (!engine)
+ return;
+
+ engine->funcs->configure(engine, cfg);
+
+ i2caux->funcs->release_engine(i2caux, &engine->base);
+}
+
+void dal_i2caux_destroy(
+ struct i2caux **i2caux)
+{
+ if (!i2caux || !*i2caux) {
+ BREAK_TO_DEBUGGER();
+ return;
+ }
+
+ (*i2caux)->funcs->destroy(i2caux);
+
+ *i2caux = NULL;
+}
+
+/*
+ * @brief
+ * An utility function used by 'struct i2caux' and its descendants
+ */
+
+uint32_t dal_i2caux_get_reference_clock(
+ struct adapter_service *as)
+{
+ struct firmware_info info = { { 0 } };
+
+ if (!dal_adapter_service_get_firmware_info(as, &info))
+ return 0;
+
+ return info.pll_info.crystal_frequency;
+}
+
+/*
+ * @brief
+ * i2caux
+ */
+
+enum {
+ /* following are expressed in KHz */
+ DEFAULT_I2C_SW_SPEED = 50,
+ DEFAULT_I2C_HW_SPEED = 50,
+
+ /* This is the timeout as defined in DP 1.2a,
+ * 2.3.4 "Detailed uPacket TX AUX CH State Description". */
+ AUX_TIMEOUT_PERIOD = 400,
+
+ /* Ideally, the SW timeout should be just above 550usec
+ * which is programmed in HW.
+ * But the SW timeout of 600usec is not reliable,
+ * because on some systems, delay_in_microseconds()
+ * returns faster than it should.
+ * EPR #379763: by trial-and-error on different systems,
+ * 700usec is the minimum reliable SW timeout for polling
+ * the AUX_SW_STATUS.AUX_SW_DONE bit.
+ * This timeout expires *only* when there is
+ * AUX Error or AUX Timeout conditions - not during normal operation.
+ * During normal operation, AUX_SW_STATUS.AUX_SW_DONE bit is set
+ * at most within ~240usec. That means,
+ * increasing this timeout will not affect normal operation,
+ * and we'll timeout after
+ * SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD = 1600usec.
+ * This timeout is especially important for
+ * resume from S3 and CTS. */
+ SW_AUX_TIMEOUT_PERIOD_MULTIPLIER = 4
+};
+
+struct i2c_engine *dal_i2caux_acquire_i2c_sw_engine(
+ struct i2caux *i2caux,
+ struct ddc *ddc)
+{
+ enum gpio_ddc_line line;
+ struct i2c_engine *engine = NULL;
+
+ if (get_hw_supported_ddc_line(ddc, &line))
+ engine = i2caux->i2c_sw_engines[line];
+
+ if (!engine)
+ engine = i2caux->i2c_generic_sw_engine;
+
+ if (!engine)
+ return NULL;
+
+ if (!engine->base.funcs->acquire(&engine->base, ddc))
+ return NULL;
+
+ return engine;
+}
+
+struct aux_engine *dal_i2caux_acquire_aux_engine(
+ struct i2caux *i2caux,
+ struct ddc *ddc)
+{
+ enum gpio_ddc_line line;
+ struct aux_engine *engine;
+
+ if (!get_hw_supported_ddc_line(ddc, &line))
+ return NULL;
+
+ engine = i2caux->aux_engines[line];
+
+ if (!engine)
+ return NULL;
+
+ if (!engine->base.funcs->acquire(&engine->base, ddc))
+ return NULL;
+
+ return engine;
+}
+
+void dal_i2caux_release_engine(
+ struct i2caux *i2caux,
+ struct engine *engine)
+{
+ engine->funcs->release_engine(engine);
+
+ dal_ddc_close(engine->ddc);
+
+ engine->ddc = NULL;
+}
+
+bool dal_i2caux_construct(
+ struct i2caux *i2caux,
+ struct adapter_service *as,
+ struct dc_context *ctx)
+{
+ uint32_t i = 0;
+
+ i2caux->ctx = ctx;
+ do {
+ i2caux->i2c_sw_engines[i] = NULL;
+ i2caux->i2c_hw_engines[i] = NULL;
+ i2caux->aux_engines[i] = NULL;
+
+ ++i;
+ } while (i < GPIO_DDC_LINE_COUNT);
+
+ i2caux->i2c_generic_sw_engine = NULL;
+ i2caux->i2c_generic_hw_engine = NULL;
+
+ i2caux->aux_timeout_period =
+ SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD;
+
+ i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED;
+ i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED;
+
+ return true;
+}
+
+void dal_i2caux_destruct(
+ struct i2caux *i2caux)
+{
+ uint32_t i = 0;
+
+ if (i2caux->i2c_generic_hw_engine)
+ i2caux->i2c_generic_hw_engine->funcs->destroy(
+ &i2caux->i2c_generic_hw_engine);
+
+ if (i2caux->i2c_generic_sw_engine)
+ i2caux->i2c_generic_sw_engine->funcs->destroy(
+ &i2caux->i2c_generic_sw_engine);
+
+ do {
+ if (i2caux->aux_engines[i])
+ i2caux->aux_engines[i]->funcs->destroy(
+ &i2caux->aux_engines[i]);
+
+ if (i2caux->i2c_hw_engines[i])
+ i2caux->i2c_hw_engines[i]->funcs->destroy(
+ &i2caux->i2c_hw_engines[i]);
+
+ if (i2caux->i2c_sw_engines[i])
+ i2caux->i2c_sw_engines[i]->funcs->destroy(
+ &i2caux->i2c_sw_engines[i]);
+
+ ++i;
+ } while (i < GPIO_DDC_LINE_COUNT);
+}
+
diff --git a/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.h
b/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.h
new file mode 100644
index 000000000000..76f5b637ec3f
--- /dev/null
+++ b/drivers/gpu/drm/amd/dal/dc/i2caux/i2caux.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2012-15 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+
+#ifndef __DAL_I2C_AUX_H__
+#define __DAL_I2C_AUX_H__
+
+uint32_t dal_i2caux_get_reference_clock(
+ struct adapter_service *as);
+
+struct i2caux;
+
+struct engine;
+
+struct i2caux_funcs {
+ void (*destroy)(struct i2caux **ptr);
+ struct i2c_engine * (*acquire_i2c_sw_engine)(
+ struct i2caux *i2caux,
+ struct ddc *ddc);
+ struct i2c_engine * (*acquire_i2c_hw_engine)(
+ struct i2caux *i2caux,
+ struct ddc *ddc);
+ struct aux_engine * (*acquire_aux_engine)(
+ struct i2caux *i2caux,
+ struct ddc *ddc);
+ void (*release_engine)(
+ struct i2caux *i2caux,
+ struct engine *engine);
+};
+
+struct i2c_engine;
+struct aux_engine;
+
+struct i2caux {
+ struct dc_context *ctx;
+ const struct i2caux_funcs *funcs;
+ /* On ASIC we have certain amount of lines with HW DDC engine
+ * (4, 6, or maybe more in the future).
+ * For every such line, we create separate HW DDC engine
+ * (since we have these engines in HW) and separate SW DDC engine
+ * (to allow concurrent use of few lines).
+ * In similar way we have AUX engines. */
+
+ /* I2C SW engines, per DDC line.
+ * Only lines with HW DDC support will be initialized */
+ struct i2c_engine *i2c_sw_engines[GPIO_DDC_LINE_COUNT];
+
+ /* I2C HW engines, per DDC line.
+ * Only lines with HW DDC support will be initialized */
+ struct i2c_engine *i2c_hw_engines[GPIO_DDC_LINE_COUNT];
+
+ /* AUX engines, per DDC line.
+ * Only lines with HW AUX support will be initialized */
+ struct aux_engine *aux_engines[GPIO_DDC_LINE_COUNT];
+
+ /* For all other lines, we can use
+ * single instance of generic I2C HW engine
+ * (since in HW, there is single instance of it)
+ * or single instance of generic I2C SW engine.
+ * AUX is not supported for other lines. */
+
+ /* General-purpose I2C SW engine.
+ * Can be assigned dynamically to any line per transaction */
+ struct i2c_engine *i2c_generic_sw_engine;
+
+ /* General-purpose I2C generic HW engine.
+ * Can be assigned dynamically to almost any line per transaction */
+ struct i2c_engine *i2c_generic_hw_engine;
+
+ /* [anaumov] in DAL2, there is a Mutex */
+
+ uint32_t aux_timeout_period;
+
+ /* expressed in KHz */
+ uint32_t default_i2c_sw_speed;
+ uint32_t default_i2c_hw_speed;
+};
+
+bool dal_i2caux_construct(
+ struct i2caux *i2caux,
+ struct adapter_service *as,
+ struct dc_context *ctx);
+
+void dal_i2caux_release_engine(
+ struct i2caux *i2caux,
+ struct engine *engine);
+
+void dal_i2caux_destruct(
+ struct i2caux *i2caux);
+
+void dal_i2caux_destroy(
+ struct i2caux **ptr);
+
+struct i2c_engine *dal_i2caux_acquire_i2c_sw_engine(
+ struct i2caux *i2caux,
+ struct ddc *ddc);
+
+struct aux_engine *dal_i2caux_acquire_aux_engine(
+ struct i2caux *i2caux,
+ struct ddc *ddc);
+
+#endif
--
2.1.4
