Introduce a dummy driver for sandbox that allows us to verify basic
functionality. This is not meant to do anything functional - but is
more or less meant as a framework plumbing debug helper.
The sandbox remoteproc driver maintains absolutey no states and is a
simple driver which just is filled with empty hooks. Idea being to give
an approximate idea to implement own remoteproc driver using this as a
template.
Reviewed-by: Simon Glass
Signed-off-by: Nishanth Menon
---
Changes Since V2:
- Fixed TODO message for removal of non-DT pdata entry
- Picked up Simon's reviewed-by from V2
V2: https://patchwork.ozlabs.org/patch/511747/
V1: https://patchwork.ozlabs.org/patch/510197/
drivers/remoteproc/Kconfig| 9 +
drivers/remoteproc/Makefile | 3 +
drivers/remoteproc/sandbox_testproc.c | 336 ++
3 files changed, 348 insertions(+)
create mode 100644 drivers/remoteproc/sandbox_testproc.c
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 444682624ace..437224b5491f 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -12,4 +12,13 @@ config REMOTEPROC
bool
depends on DM
+# Please keep the configuration alphabetically sorted.
+config REMOTEPROC_SANDBOX
+ bool "Support for Test processor for Sandbox"
+ select REMOTEPROC
+ depends on DM
+ depends on SANDBOX
+ help
+ Say 'y' here to add support for test processor which does dummy
+ operations for sandbox platform.
endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 14c27929b63e..720aa6e64701 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -5,3 +5,6 @@
#
obj-$(CONFIG_REMOTEPROC) += rproc-uclass.o
+
+# Remote proc drivers - Please keep this list alphabetically sorted.
+obj-$(CONFIG_REMOTEPROC_SANDBOX) += sandbox_testproc.o
diff --git a/drivers/remoteproc/sandbox_testproc.c
b/drivers/remoteproc/sandbox_testproc.c
new file mode 100644
index ..004c7792d186
--- /dev/null
+++ b/drivers/remoteproc/sandbox_testproc.c
@@ -0,0 +1,336 @@
+/*
+ * (C) Copyright 2015
+ * Texas Instruments Incorporated - http://www.ti.com/
+ * SPDX-License-Identifier:GPL-2.0+
+ */
+#define pr_fmt(fmt) "%s: " fmt, __func__
+#include
+#include
+#include
+#include
+
+/**
+ * enum sandbox_state - different device states
+ * @sb_booted: Entry condition, just booted
+ * @sb_init: Initialized (basic environment is ready)
+ * @sb_reset: Held in reset (accessible, but not running)
+ * @sb_loaded: Loaded with image (but not running)
+ * @sb_running:Processor is running
+ */
+enum sandbox_state {
+ sb_booted,
+ sb_init,
+ sb_reset,
+ sb_loaded,
+ sb_running
+};
+
+/**
+ * struct sandbox_test_devdata - private data per device
+ * @current_state: device current state
+ */
+struct sandbox_test_devdata {
+ enum sandbox_state current_state;
+};
+
+/**
+ * sandbox_dev_move_to_state() - statemachine for our dummy device
+ * @dev: device to switch state
+ * @next_state:next proposed state
+ *
+ * This tries to follow the following statemachine:
+ * Entry
+ *|
+ *v
+ * +---+
+ * +---+ init |
+ * | | | <-+
+ * | +---+ |
+ * | |
+ * | |
+ * | ++ |
+ * Load| | reset | |
+ * | || <--+ |
+ * | ++| |
+ * ||Load| |
+ * ||| |
+ * | +v+ reset | |
+ * +-> | |(opt) | |
+ * | Loaded +---+ |
+ * | | |
+ * +++ |
+ * | Start|
+ * +---v-+(opt) |
+ * +->| Running |Stop|
+ * Ping +- | ++
+ * (opt)+-+
+ *
+ * (is_running does not change state)
+ *
+ * Return: 0 when valid state transition is seen, else returns -EINVAL
+ */
+static int sandbox_dev_move_to_state(struct udevice *dev,
+enum sandbox_state next_state)
+{
+ struct sandbox_test_devdata *ddata = dev_get_priv(dev);
+
+ /* No state transition is OK */
+ if (ddata->current_state == next_state)
+ return 0;
+
+ debug("current_state=%d, next_state=%d\n", ddata->current_state,
+ next_state);
+ switch (ddata->current_state) {
+ case sb_booted:
+ if (next_state == sb_init)
+ goto ok_state;
+ break;
+
+ case sb_init:
+ if (next_state == sb_reset ||
