Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6163
-gerrit
commit f9a55c8382370d650e8850307ccea5ab95e57063 Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Sun Jun 29 16:17:33 2014 +0300
SPI: Split writes using spi_crop_chunk()
SPI controllers in Intel and AMD bridges have a slightly different restriction on how long transactions they can handle.
Change-Id: I3d149d4b7e7e9633482a153d5e380a86c553d871 Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/drivers/spi/adesto.c | 4 ++-- src/drivers/spi/amic.c | 4 ++-- src/drivers/spi/gigadevice.c | 4 ++-- src/drivers/spi/macronix.c | 5 ++--- src/drivers/spi/stmicro.c | 4 ++-- src/drivers/spi/winbond.c | 4 ++-- src/include/spi-generic.h | 2 ++ src/include/spi_flash.h | 8 -------- src/soc/intel/baytrail/spi.c | 7 ++++++- src/soc/intel/fsp_baytrail/spi.c | 7 ++++++- src/southbridge/amd/agesa/hudson/spi.c | 9 +++++++++ src/southbridge/amd/cimx/sb800/spi.c | 10 ++++++++++ src/southbridge/intel/common/spi.c | 7 ++++++- 13 files changed, 51 insertions(+), 24 deletions(-)
diff --git a/src/drivers/spi/adesto.c b/src/drivers/spi/adesto.c index 9dc8e14..50e5883 100644 --- a/src/drivers/spi/adesto.c +++ b/src/drivers/spi/adesto.c @@ -100,7 +100,7 @@ static int adesto_write(struct spi_flash *flash,
for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_AT25DF_PP; cmd[1] = (offset >> 16) & 0xff; @@ -118,7 +118,7 @@ static int adesto_write(struct spi_flash *flash, goto out; }
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: adesto Page Program failed\n"); diff --git a/src/drivers/spi/amic.c b/src/drivers/spi/amic.c index 4cccc71..63a68a5 100644 --- a/src/drivers/spi/amic.c +++ b/src/drivers/spi/amic.c @@ -82,7 +82,7 @@ static int amic_write(struct spi_flash *flash,
for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_A25_PP; cmd[1] = (offset >> 16) & 0xff; @@ -100,7 +100,7 @@ static int amic_write(struct spi_flash *flash, goto out; }
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: AMIC Page Program failed\n"); diff --git a/src/drivers/spi/gigadevice.c b/src/drivers/spi/gigadevice.c index 3fb89c7..783d321 100644 --- a/src/drivers/spi/gigadevice.c +++ b/src/drivers/spi/gigadevice.c @@ -141,7 +141,7 @@ static int gigadevice_write(struct spi_flash *flash, u32 offset,
for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
ret = spi_flash_cmd(flash->spi, CMD_GD25_WREN, NULL, 0); if (ret < 0) { @@ -161,7 +161,7 @@ static int gigadevice_write(struct spi_flash *flash, u32 offset, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); #endif
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, diff --git a/src/drivers/spi/macronix.c b/src/drivers/spi/macronix.c index 3611599..6e910f6 100644 --- a/src/drivers/spi/macronix.c +++ b/src/drivers/spi/macronix.c @@ -144,13 +144,12 @@ static int macronix_write(struct spi_flash *flash, ret = 0; for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_MX25XX_PP; cmd[1] = (offset >> 16) & 0xff; cmd[2] = (offset >> 8) & 0xff; cmd[3] = offset & 0xff; - #if CONFIG_DEBUG_SPI_FLASH printk(BIOS_SPEW, "PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x }" " chunk_len = %zu\n", @@ -163,7 +162,7 @@ static int macronix_write(struct spi_flash *flash, break; }
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: Macronix Page Program failed\n"); diff --git a/src/drivers/spi/stmicro.c b/src/drivers/spi/stmicro.c index c825bd0..bc7969d 100644 --- a/src/drivers/spi/stmicro.c +++ b/src/drivers/spi/stmicro.c @@ -155,7 +155,7 @@ static int stmicro_write(struct spi_flash *flash,
for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_M25PXX_PP; cmd[1] = (offset >> 16) & 0xff; @@ -173,7 +173,7 @@ static int stmicro_write(struct spi_flash *flash, goto out; }
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: STMicro Page Program failed\n"); diff --git a/src/drivers/spi/winbond.c b/src/drivers/spi/winbond.c index eb0868e..7ddd312 100644 --- a/src/drivers/spi/winbond.c +++ b/src/drivers/spi/winbond.c @@ -134,7 +134,7 @@ static int winbond_write(struct spi_flash *flash,
for (actual = 0; actual < len; actual += chunk_len) { chunk_len = min(len - actual, page_size - byte_addr); - chunk_len = min(chunk_len, CONTROLLER_PAGE_LIMIT); + chunk_len = spi_crop_chunk(sizeof(cmd), chunk_len);
cmd[0] = CMD_W25_PP; cmd[1] = (offset >> 16) & 0xff; @@ -152,7 +152,7 @@ static int winbond_write(struct spi_flash *flash, goto out; }
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { printk(BIOS_WARNING, "SF: Winbond Page Program failed\n"); diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h index 6cdb87a..e92e56c 100644 --- a/src/include/spi-generic.h +++ b/src/include/spi-generic.h @@ -181,6 +181,8 @@ void spi_cs_deactivate(struct spi_slave *slave); */ void spi_set_speed(struct spi_slave *slave, uint32_t hz);
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len); + /*----------------------------------------------------------------------- * Write 8 bits, then read 8 bits. * slave: The SPI slave we're communicating with diff --git a/src/include/spi_flash.h b/src/include/spi_flash.h index 8e51471..b424b4b 100644 --- a/src/include/spi_flash.h +++ b/src/include/spi_flash.h @@ -39,14 +39,6 @@ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );})
-#define CONFIG_ICH_SPI -#ifdef CONFIG_ICH_SPI -#define CONTROLLER_PAGE_LIMIT 64 -#else -/* any number larger than 4K would do, actually */ -#define CONTROLLER_PAGE_LIMIT ((int)(~0U>>1)) -#endif - struct spi_flash { struct spi_slave *spi;
diff --git a/src/soc/intel/baytrail/spi.c b/src/soc/intel/baytrail/spi.c index 5ac42c2..b66f6dc 100644 --- a/src/soc/intel/baytrail/spi.c +++ b/src/soc/intel/baytrail/spi.c @@ -500,6 +500,11 @@ static int ich_status_poll(u16 bitmask, int wait_til_set) return -1; }
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(cntlr.databytes, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, void *din, unsigned int bitsin) { @@ -594,7 +599,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, */ if (trans.bytesout > cntlr.databytes) { printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); + " spi_crop_chunk()?\n"); return -1; }
diff --git a/src/soc/intel/fsp_baytrail/spi.c b/src/soc/intel/fsp_baytrail/spi.c index ddec2e0..c12dd52 100644 --- a/src/soc/intel/fsp_baytrail/spi.c +++ b/src/soc/intel/fsp_baytrail/spi.c @@ -498,6 +498,11 @@ static int ich_status_poll(u16 bitmask, int wait_til_set) return -1; }
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(cntlr.databytes, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, void *din, unsigned int bitsin) { @@ -591,7 +596,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, */ if (trans.bytesout > cntlr.databytes) { printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); + " spi_crop_chunk()?\n"); return -1; }
diff --git a/src/southbridge/amd/agesa/hudson/spi.c b/src/southbridge/amd/agesa/hudson/spi.c index 573dd3d..de42699 100644 --- a/src/southbridge/amd/agesa/hudson/spi.c +++ b/src/southbridge/amd/agesa/hudson/spi.c @@ -42,6 +42,7 @@ static int bus_claimed = 0; #define SPI_REG_CNTRL11 0xd #define CNTRL11_FIFOPTR_MASK 0x07
+#define AMD_SB_SPI_TX_LEN 64
static u32 spibar;
@@ -86,6 +87,14 @@ void spi_init(void) spibar = pci_read_config32(dev, 0xA0) & ~0x1F; }
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + /* Command byte does not consume buffer space. */ + if (cmd_len) + cmd_len--; + return min(AMD_SB_SPI_TX_LEN - cmd_len, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, void *din, unsigned int bitsin) { diff --git a/src/southbridge/amd/cimx/sb800/spi.c b/src/southbridge/amd/cimx/sb800/spi.c index a1cdf55..52e5d0c 100644 --- a/src/southbridge/amd/cimx/sb800/spi.c +++ b/src/southbridge/amd/cimx/sb800/spi.c @@ -32,6 +32,8 @@ static int bus_claimed = 0; #endif
+#define AMD_SB_SPI_TX_LEN 8 + static u32 spibar;
static void reset_internal_fifo_pointer(void) @@ -56,6 +58,14 @@ void spi_init() spibar = pci_read_config32(dev, 0xA0) & ~0x1F; }
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + /* Command byte does not consume buffer space. */ + if (cmd_len) + cmd_len--; + return min(AMD_SB_SPI_TX_LEN - cmd_len, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, void *din, unsigned int bitsin) { diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c index 51586cc..8db134a 100644 --- a/src/southbridge/intel/common/spi.c +++ b/src/southbridge/intel/common/spi.c @@ -551,6 +551,11 @@ static int spi_is_multichip (void) return !!((cntlr.flmap0 >> 8) & 3); }
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(cntlr.databytes, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, void *din, unsigned int bitsin) { @@ -645,7 +650,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, */ if (trans.bytesout > cntlr.databytes) { printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); + " spi_crop_chunk()?\n"); return -1; }
-
Kyösti Mälkki