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[PATCH v4 5/9] hw/sd: ssi-sd: Support single block write
From: |
Bin Meng |
Subject: |
[PATCH v4 5/9] hw/sd: ssi-sd: Support single block write |
Date: |
Thu, 28 Jan 2021 14:30:31 +0800 |
From: Bin Meng <bin.meng@windriver.com>
Add 2 more states for the block write operation. The SPI host needs
to send a data start token to start the transfer, and the data block
written to the card will be acknowledged by a data response token.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
[PMD: Change VMState version id 6 -> 7]
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
(no changes since v1)
hw/sd/ssi-sd.c | 44 ++++++++++++++++++++++++++++++++++++++++----
1 file changed, 40 insertions(+), 4 deletions(-)
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index 6d20a240c6..1205ad8b52 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -43,6 +43,8 @@ typedef enum {
SSI_SD_DATA_START,
SSI_SD_DATA_READ,
SSI_SD_DATA_CRC16,
+ SSI_SD_DATA_WRITE,
+ SSI_SD_SKIP_CRC16,
} ssi_sd_mode;
struct ssi_sd_state {
@@ -53,6 +55,7 @@ struct ssi_sd_state {
uint8_t response[5];
uint16_t crc16;
int32_t read_bytes;
+ int32_t write_bytes;
int32_t arglen;
int32_t response_pos;
int32_t stopping;
@@ -85,6 +88,9 @@ OBJECT_DECLARE_SIMPLE_TYPE(ssi_sd_state, SSI_SD)
/* dummy value - don't care */
#define SSI_DUMMY 0xff
+/* data accepted */
+#define DATA_RESPONSE_ACCEPTED 0x05
+
static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val)
{
ssi_sd_state *s = SSI_SD(dev);
@@ -113,10 +119,17 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev,
uint32_t val)
switch (s->mode) {
case SSI_SD_CMD:
- if (val == SSI_DUMMY) {
+ switch (val) {
+ case SSI_DUMMY:
DPRINTF("NULL command\n");
return SSI_DUMMY;
+ break;
+ case SSI_TOKEN_SINGLE:
+ DPRINTF("Start write block\n");
+ s->mode = SSI_SD_DATA_WRITE;
+ return SSI_DUMMY;
}
+
s->cmd = val & 0x3f;
s->mode = SSI_SD_CMDARG;
s->arglen = 0;
@@ -250,6 +263,27 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev,
uint32_t val)
s->response_pos = 0;
}
return val;
+ case SSI_SD_DATA_WRITE:
+ sdbus_write_byte(&s->sdbus, val);
+ s->write_bytes++;
+ if (!sdbus_receive_ready(&s->sdbus) || s->write_bytes == 512) {
+ DPRINTF("Data write end\n");
+ s->mode = SSI_SD_SKIP_CRC16;
+ s->response_pos = 0;
+ }
+ return val;
+ case SSI_SD_SKIP_CRC16:
+ /* we don't verify the crc16 */
+ s->response_pos++;
+ if (s->response_pos == 2) {
+ DPRINTF("CRC16 receive end\n");
+ s->mode = SSI_SD_RESPONSE;
+ s->write_bytes = 0;
+ s->arglen = 1;
+ s->response[0] = DATA_RESPONSE_ACCEPTED;
+ s->response_pos = 0;
+ }
+ return SSI_DUMMY;
}
/* Should never happen. */
return SSI_DUMMY;
@@ -259,7 +293,7 @@ static int ssi_sd_post_load(void *opaque, int version_id)
{
ssi_sd_state *s = (ssi_sd_state *)opaque;
- if (s->mode > SSI_SD_DATA_CRC16) {
+ if (s->mode > SSI_SD_SKIP_CRC16) {
return -EINVAL;
}
if (s->mode == SSI_SD_CMDARG &&
@@ -277,8 +311,8 @@ static int ssi_sd_post_load(void *opaque, int version_id)
static const VMStateDescription vmstate_ssi_sd = {
.name = "ssi_sd",
- .version_id = 6,
- .minimum_version_id = 6,
+ .version_id = 7,
+ .minimum_version_id = 7,
.post_load = ssi_sd_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT32(mode, ssi_sd_state),
@@ -287,6 +321,7 @@ static const VMStateDescription vmstate_ssi_sd = {
VMSTATE_UINT8_ARRAY(response, ssi_sd_state, 5),
VMSTATE_UINT16(crc16, ssi_sd_state),
VMSTATE_INT32(read_bytes, ssi_sd_state),
+ VMSTATE_INT32(write_bytes, ssi_sd_state),
VMSTATE_INT32(arglen, ssi_sd_state),
VMSTATE_INT32(response_pos, ssi_sd_state),
VMSTATE_INT32(stopping, ssi_sd_state),
@@ -340,6 +375,7 @@ static void ssi_sd_reset(DeviceState *dev)
memset(s->response, 0, sizeof(s->response));
s->crc16 = 0;
s->read_bytes = 0;
+ s->write_bytes = 0;
s->arglen = 0;
s->response_pos = 0;
s->stopping = 0;
--
2.25.1
- [PATCH v4 0/9] hw/sd: Support block read/write in SPI mode, Bin Meng, 2021/01/28
- [PATCH v4 1/9] hw/sd: ssi-sd: Support multiple block read, Bin Meng, 2021/01/28
- [PATCH v4 2/9] hw/sd: sd: Remove duplicated codes in single/multiple block read/write, Bin Meng, 2021/01/28
- [PATCH v4 3/9] hw/sd: sd: Allow single/multiple block write for SPI mode, Bin Meng, 2021/01/28
- [PATCH v4 4/9] hw/sd: Introduce receive_ready() callback, Bin Meng, 2021/01/28
- [PATCH v4 5/9] hw/sd: ssi-sd: Support single block write,
Bin Meng <=
- [PATCH v4 6/9] hw/sd: ssi-sd: Support multiple block write, Bin Meng, 2021/01/28
- [PATCH v4 9/9] hw/sd: ssi-sd: Handle the rest commands with R1b response type, Bin Meng, 2021/01/28
- [PATCH v4 8/9] hw/sd: ssi-sd: Fix STOP_TRANSMISSION (CMD12) response, Bin Meng, 2021/01/28
- [PATCH v4 7/9] hw/sd: ssi-sd: Fix SEND_IF_COND (CMD8) response, Bin Meng, 2021/01/28