From: Sai Pavan Boddu <sai.pavan.bo...@xilinx.com>
switch operation in mmc cards, updated the ext_csd register to
request changes in card operations. Here we implement similar
sequence but requests are mostly dummy and make no change.
Implement SWITCH_ERROR if the write operation offset goes beyond
length of ext_csd.
Signed-off-by: Sai Pavan Boddu <sai.pavan.bo...@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
Signed-off-by: Cédric Le Goater <c...@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
hw/sd/sd.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++
hw/sd/trace-events | 2 ++
2 files changed, 58 insertions(+)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index a391f12b2a..beb8e2730a 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -642,6 +642,7 @@ static bool sd_req_rca_same(SDState *s, SDRequest req)
FIELD(CSR, AKE_SEQ_ERROR, 3, 1)
FIELD(CSR, APP_CMD, 5, 1)
FIELD(CSR, FX_EVENT, 6, 1)
+FIELD(CSR, SWITCH_ERROR, 7, 1)
FIELD(CSR, READY_FOR_DATA, 8, 1)
FIELD(CSR, CURRENT_STATE, 9, 4)
FIELD(CSR, ERASE_RESET, 13, 1)
@@ -1091,6 +1092,47 @@ static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
return ret;
}
+enum ExtCsdAccessMode {
+ EXT_CSD_ACCESS_MODE_COMMAND_SET = 0,
+ EXT_CSD_ACCESS_MODE_SET_BITS = 1,
+ EXT_CSD_ACCESS_MODE_CLEAR_BITS = 2,
+ EXT_CSD_ACCESS_MODE_WRITE_BYTE = 3
+};
+
+static void mmc_function_switch(SDState *sd, uint32_t arg)
+{
+ uint8_t access = extract32(arg, 24, 2);
+ uint8_t index = extract32(arg, 16, 8);
+ uint8_t value = extract32(arg, 8, 8);
+ uint8_t b = sd->ext_csd[index];
+
+ trace_sdcard_switch(access, index, value, extract32(arg, 0, 2));
+
+ if (index >= 192) {
+ qemu_log_mask(LOG_GUEST_ERROR, "MMC switching illegal offset\n");
+ sd->card_status |= R_CSR_SWITCH_ERROR_MASK;
+ return;
+ }
+
+ switch (access) {
+ case EXT_CSD_ACCESS_MODE_COMMAND_SET:
+ qemu_log_mask(LOG_UNIMP, "MMC Command set switching not supported\n");
+ return;
+ case EXT_CSD_ACCESS_MODE_SET_BITS:
+ b |= value;
+ break;
+ case EXT_CSD_ACCESS_MODE_CLEAR_BITS:
+ b &= ~value;
+ break;
+ case EXT_CSD_ACCESS_MODE_WRITE_BYTE:
+ b = value;
+ break;
+ }
+
+ trace_sdcard_ext_csd_update(index, sd->ext_csd[index], b);
+ sd->ext_csd[index] = b;
+}
+
static void sd_function_switch(SDState *sd, uint32_t arg)
{
int i, mode, new_func;
@@ -1402,6 +1444,19 @@ static sd_rsp_type_t sd_cmd_SWITCH_FUNCTION(SDState *sd,
SDRequest req)
return sd_cmd_to_sendingdata(sd, req, 0, NULL, 64);
}
+static sd_rsp_type_t emmc_cmd_SWITCH(SDState *sd, SDRequest req)
+{
+ switch (sd->state) {
+ case sd_transfer_state:
+ sd->state = sd_programming_state;
+ mmc_function_switch(sd, req.arg);
+ sd->state = sd_transfer_state;
+ return sd_r1b;
+ default:
+ return sd_invalid_state_for_cmd(sd, req);
+ }
+}
+
/* CMD7 */
static sd_rsp_type_t sd_cmd_DE_SELECT_CARD(SDState *sd, SDRequest req)
{
@@ -2581,6 +2636,7 @@ static const SDProto sd_proto_emmc = {
[3] = {0, sd_ac, "SET_RELATIVE_ADDR", emmc_cmd_SET_RELATIVE_ADDR},
[4] = {0, sd_bc, "SEND_DSR", sd_cmd_unimplemented},
[5] = {0, sd_ac, "SLEEP/AWAKE", emmc_cmd_sleep_awake},
+ [6] = {10, sd_adtc, "SWITCH", emmc_cmd_SWITCH},
[7] = {0, sd_ac, "(DE)SELECT_CARD", sd_cmd_DE_SELECT_CARD},
[8] = {0, sd_adtc, "SEND_EXT_CSD", emmc_cmd_SEND_EXT_CSD},
[9] = {0, sd_ac, "SEND_CSD", sd_cmd_SEND_CSD},
diff --git a/hw/sd/trace-events b/hw/sd/trace-events
index 5dfe6be7b7..43671dc791 100644
--- a/hw/sd/trace-events
+++ b/hw/sd/trace-events
@@ -57,6 +57,8 @@ sdcard_write_block(uint64_t addr, uint32_t len) "addr 0x%"
PRIx64 " size 0x%x"
sdcard_write_data(const char *proto, const char *cmd_desc, uint8_t cmd,
uint32_t offset, uint8_t value) "%s %20s/ CMD%02d ofs %"PRIu32" value 0x%02x"
sdcard_read_data(const char *proto, const char *cmd_desc, uint8_t cmd,
uint32_t offset, uint64_t size, uint32_t blklen) "%s %20s/ CMD%02d ofs
%"PRIu32" size %"PRIu64" blklen %" PRIu32
sdcard_set_voltage(uint16_t millivolts) "%u mV"
+sdcard_ext_csd_update(unsigned index, uint8_t oval, uint8_t nval) "index %u:
0x%02x -> 0x%02x"
+sdcard_switch(unsigned access, unsigned index, unsigned value, unsigned set)
"SWITCH acc:%u idx:%u val:%u set:%u"
# pxa2xx_mmci.c
pxa2xx_mmci_read(uint8_t size, uint32_t addr, uint32_t value) "size %d addr
0x%02x value 0x%08x"
--
2.41.0
