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[PATCH 15/22] hw/sd: ssi-sd: Support multiple block write
From: |
Bin Meng |
Subject: |
[PATCH 15/22] hw/sd: ssi-sd: Support multiple block write |
Date: |
Thu, 31 Dec 2020 19:30:03 +0800 |
From: Bin Meng <bin.meng@windriver.com>
For a multiple block write operation, each block begins with a multi
write start token. Unlike the SD mode that the multiple block write
ends when receiving a STOP_TRAN command (CMD12), a special stop tran
tocken is used to signal the card.
Emulating this by manually sending a CMD12 to the SD card core, to
bring it out of the receiving data state.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
---
hw/sd/ssi-sd.c | 26 ++++++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
index 21a96e91f0..6cf5d749c7 100644
--- a/hw/sd/ssi-sd.c
+++ b/hw/sd/ssi-sd.c
@@ -99,6 +99,8 @@ OBJECT_DECLARE_SIMPLE_TYPE(ssi_sd_state, SSI_SD)
static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uint32_t val)
{
ssi_sd_state *s = SSI_SD(dev);
+ SDRequest request;
+ uint8_t longresp[16];
/* Special case: allow CMD12 (STOP TRANSMISSION) while reading data. */
if (s->mode == SSI_SD_DATA_READ && val == 0x4c) {
@@ -115,9 +117,31 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev,
uint32_t val)
return SSI_DUMMY;
break;
case SSI_TOKEN_SINGLE:
+ case SSI_TOKEN_MULTI_WRITE:
DPRINTF("Start write block\n");
s->mode = SSI_SD_DATA_WRITE;
return SSI_DUMMY;
+ case SSI_TOKEN_STOP_TRAN:
+ DPRINTF("Stop multiple write\n");
+
+ /* manually issue cmd12 to stop the transfer */
+ request.cmd = 12;
+ request.arg = 0;
+ s->arglen = sdbus_do_command(&s->sdbus, &request, longresp);
+ if (s->arglen <= 0) {
+ s->arglen = 1;
+ /* a zero value indicates the card is busy */
+ s->response[0] = 0;
+ DPRINTF("SD card busy\n");
+ } else {
+ s->arglen = 1;
+ /* a non-zero value indicates the card is ready */
+ s->response[0] = SSI_DUMMY;
+ }
+
+ s->mode = SSI_SD_RESPONSE;
+ s->response_pos = 0;
+ return SSI_DUMMY;
}
s->cmd = val & 0x3f;
@@ -126,8 +150,6 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev,
uint32_t val)
return SSI_DUMMY;
case SSI_SD_CMDARG:
if (s->arglen == 4) {
- SDRequest request;
- uint8_t longresp[16];
/* FIXME: Check CRC. */
request.cmd = s->cmd;
request.arg = ldl_be_p(s->cmdarg);
--
2.25.1
- [PATCH 05/22] hw/sd: sd: Drop sd_crc16(), (continued)
- [PATCH 05/22] hw/sd: sd: Drop sd_crc16(), Bin Meng, 2020/12/31
- [PATCH 06/22] util: Add CRC16 (CCITT) calculation routines, Bin Meng, 2020/12/31
- [PATCH 07/22] hw/sd: ssi-sd: Suffix a data block with CRC16, Bin Meng, 2020/12/31
- [PATCH 08/22] hw/sd: ssi-sd: Support multiple block read (CMD18), Bin Meng, 2020/12/31
- [PATCH 09/22] hw/sd: ssi-sd: Use macros for the dummy value and tokens in the transfer, Bin Meng, 2020/12/31
- [PATCH 11/22] hw/sd: sd: Allow single/multiple block write for SPI mode, Bin Meng, 2020/12/31
- [PATCH 14/22] hw/sd: ssi-sd: Support single block write, Bin Meng, 2020/12/31
- [PATCH 10/22] hw/sd: sd: Remove duplicated codes in single/multiple block read/write, Bin Meng, 2020/12/31
- [PATCH 12/22] hw/sd: sd.h: Cosmetic change of using spaces, Bin Meng, 2020/12/31
- [PATCH 13/22] hw/sd: Introduce receive_ready() callback, Bin Meng, 2020/12/31
- [PATCH 15/22] hw/sd: ssi-sd: Support multiple block write,
Bin Meng <=
- [PATCH 16/22] hw/ssi: Add SiFive SPI controller support, Bin Meng, 2020/12/31
- [PATCH 18/22] hw/riscv: sifive_u: Add QSPI2 controller and connect an SD card, Bin Meng, 2020/12/31
- [PATCH 19/22] hw/riscv: sifive_u: Change SIFIVE_U_GEM_IRQ to decimal value, Bin Meng, 2020/12/31
- [PATCH 17/22] hw/riscv: sifive_u: Add QSPI0 controller and connect a flash, Bin Meng, 2020/12/31
- [PATCH 20/22] docs/system: Sort targets in alphabetical order, Bin Meng, 2020/12/31
- [PATCH 21/22] docs/system: Add RISC-V documentation, Bin Meng, 2020/12/31
- [PATCH 22/22] docs/system: riscv: Add documentation for sifive_u machine, Bin Meng, 2020/12/31