Current sf uses FAST_READ command, this patch adds support to use the different/extended read command.
This implementation will determine the fastest command by taking the supported commands from the flash and the controller, controller is always been a priority.
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- Changes for v4: - none Changes for v3: - none Changes for v2: - none
doc/SPI/status.txt | 2 +- drivers/mtd/spi/spi_flash_ops.c | 2 +- drivers/mtd/spi/spi_flash_probe.c | 180 +++++++++++++++++++++----------------- drivers/spi/spi.c | 2 + include/spi.h | 2 + include/spi_flash.h | 18 ++++ 6 files changed, 122 insertions(+), 84 deletions(-)
diff --git a/doc/SPI/status.txt b/doc/SPI/status.txt index be5aebd..cca3ae4 100644 --- a/doc/SPI/status.txt +++ b/doc/SPI/status.txt @@ -10,12 +10,12 @@ SPI FLASH (drivers/mtd/spi): - spi_flash_ops.c: SPI flash operations code. - spi_flash.c: SPI flash interface, which interacts controller driver. - Common probe support for all supported flash vendors except, ramtron. +- Extended read commands support(Array slow/fast, dual output fast, dual IO fast)
SPI DRIVERS (drivers/spi): -
TODO: -- Extended read commands support(dual read, dual IO read) - Quad Page Program support. - Quad Read support(quad fast read, quad IO read) - Dual flash connection topology support(accessing two spi flash memories with single cs) diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c index b4e1c40..9fd1d6b 100644 --- a/drivers/mtd/spi/spi_flash_ops.c +++ b/drivers/mtd/spi/spi_flash_ops.c @@ -273,7 +273,7 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, return 0; }
- cmd[0] = CMD_READ_ARRAY_FAST; + cmd[0] = flash->read_cmd; cmd[4] = 0x00;
while (len) { diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c index daf53ac..e08d66e 100644 --- a/drivers/mtd/spi/spi_flash_probe.c +++ b/drivers/mtd/spi/spi_flash_probe.c @@ -18,6 +18,13 @@
DECLARE_GLOBAL_DATA_PTR;
+static const u32 spi_read_cmds_array[] = { + CMD_READ_ARRAY_SLOW, + CMD_READ_ARRAY_FAST, + CMD_READ_DUAL_OUTPUT_FAST, + CMD_READ_DUAL_IO_FAST, +}; + /* * struct spi_flash_params - SPI/QSPI flash device params structure * @@ -26,6 +33,7 @@ DECLARE_GLOBAL_DATA_PTR; * @ext_jedec: Device ext_jedec ID * @sector_size: Sector size of this device * @nr_sectors: No.of sectors on this device + * @rd_cmd: Read command * @flags: Importent param, for flash specific behaviour */ struct spi_flash_params { @@ -34,107 +42,104 @@ struct spi_flash_params { u16 ext_jedec; u32 sector_size; u32 nr_sectors; + u8 rd_cmd; u16 flags; };
static const struct spi_flash_params spi_flash_params_table[] = { #ifdef CONFIG_SPI_FLASH_ATMEL /* ATMEL */ - {"AT45DB011D", 0x1f2200, 0x0, 64 * 1024, 4, SECT_4K}, - {"AT45DB021D", 0x1f2300, 0x0, 64 * 1024, 8, SECT_4K}, - {"AT45DB041D", 0x1f2400, 0x0, 64 * 1024, 8, SECT_4K}, - {"AT45DB081D", 0x1f2500, 0x0, 64 * 1024, 16, SECT_4K}, - {"AT45DB161D", 0x1f2600, 0x0, 64 * 1024, 32, SECT_4K}, - {"AT45DB321D", 0x1f2700, 0x0, 64 * 1024, 64, SECT_4K}, - {"AT45DB641D", 0x1f2800, 0x0, 64 * 1024, 128, SECT_4K}, + {"AT45DB011D", 0x1f2200, 0x0, 64 * 1024, 4, 0, SECT_4K}, + {"AT45DB021D", 0x1f2300, 0x0, 64 * 1024, 8, 0, SECT_4K}, + {"AT45DB041D", 0x1f2400, 0x0, 64 * 1024, 8, 0, SECT_4K}, + {"AT45DB081D", 0x1f2500, 0x0, 64 * 1024, 16, 0, SECT_4K}, + {"AT45DB161D", 0x1f2600, 0x0, 64 * 1024, 32, 0, SECT_4K}, + {"AT45DB321D", 0x1f2700, 0x0, 64 * 1024, 64, 0, SECT_4K}, + {"AT45DB641D", 0x1f2800, 0x0, 64 * 1024, 128, 0, SECT_4K}, #endif #ifdef CONFIG_SPI_FLASH_EON /* EON */ - {"EN25Q32B", 0x1c3016, 0x0, 64 * 1024, 64, 0}, - {"EN25Q64", 0x1c3017, 0x0, 64 * 1024, 128, SECT_4K}, - {"EN25Q128B", 0x1c3018, 0x0, 64 * 1024, 256, 0}, + {"EN25Q32B", 0x1c3016, 0x0, 64 * 1024, 64, 0, 0}, + {"EN25Q64", 0x1c3017, 0x0, 64 * 1024, 128, 0, SECT_4K}, + {"EN25Q128B", 0x1c3018, 0x0, 64 * 1024, 256, 0, 0}, #endif #ifdef CONFIG_SPI_FLASH_GIGADEVICE /* GIGADEVICE */ - {"GD25Q64B", 0xc84017, 0x0, 64 * 1024, 128, SECT_4K}, - {"GD25LQ32", 0xc86016, 0x0, 64 * 1024, 64, SECT_4K}, + {"GD25Q64B", 0xc84017, 0x0, 64 * 1024, 128, 0, SECT_4K}, + {"GD25LQ32", 0xc86016, 0x0, 64 * 1024, 64, 0, SECT_4K}, #endif #ifdef CONFIG_SPI_FLASH_MACRONIX /* MACRONIX */ - {"MX25L4005", 0xc22013, 0x0, 64 * 1024, 8, 0}, - {"MX25L8005", 0xc22014, 0x0, 64 * 1024, 16, 0}, - {"MX25L1605D", 0xc22015, 0x0, 64 * 1024, 32, 0}, - {"MX25L3205D", 0xc22016, 0x0, 64 * 1024, 64, 0}, - {"MX25L6405D", 0xc22017, 0x0, 64 * 1024, 128, 0}, - {"MX25L12805", 0xc22018, 0x0, 64 * 1024, 256, 0}, - {"MX25L25635F", 0xc22019, 0x0, 64 * 1024, 512, 0}, - {"MX25L51235F", 0xc2201A, 0x0, 64 * 1024, 1024, 0}, - {"MX25L12855E", 0xc22618, 0x0, 64 * 1024, 256, 0}, + {"MX25L4005", 0xc22013, 0x0, 64 * 1024, 8, 0, 0}, + {"MX25L8005", 0xc22014, 0x0, 64 * 1024, 16, 0, 0}, + {"MX25L1605D", 0xc22015, 0x0, 64 * 1024, 32, 0, 0}, + {"MX25L3205D", 0xc22016, 0x0, 64 * 1024, 64, 0, 0}, + {"MX25L6405D", 0xc22017, 0x0, 64 * 1024, 128, 0, 0}, + {"MX25L12805", 0xc22018, 0x0, 64 * 1024, 256, 0, 0}, + {"MX25L12855E", 0xc22618, 0x0, 64 * 1024, 256, 0, 0}, #endif #ifdef CONFIG_SPI_FLASH_SPANSION /* SPANSION */ - {"S25FL008A", 0x010213, 0x0, 64 * 1024, 16, 0}, - {"S25FL016A", 0x010214, 0x0, 64 * 1024, 32, 0}, - {"S25FL032A", 0x010215, 0x0, 64 * 1024, 64, 0}, - {"S25FL064A", 0x010216, 0x0, 64 * 1024, 128, 0}, - {"S25FL128P_256K", 0x012018, 0x0300, 256 * 1024, 64, 0}, - {"S25FL128P_64K", 0x012018, 0x0301, 64 * 1024, 256, 0}, - {"S25FL032P", 0x010215, 0x4d00, 64 * 1024, 64, 0}, - {"S25FL064P", 0x010216, 0x4d00, 64 * 1024, 128, 0}, - {"S25FL128S_64K", 0x012018, 0x4d01, 64 * 1024, 256, 0}, - {"S25FL256S_256K", 0x010219, 0x4d00, 64 * 1024, 512, 0}, - {"S25FL256S_64K", 0x010219, 0x4d01, 64 * 1024, 512, 0}, - {"S25FL512S_256K", 0x010220, 0x4d00, 64 * 1024, 1024, 0}, - {"S25FL512S_64K", 0x010220, 0x4d01, 64 * 1024, 1024, 0}, + {"S25FL008A", 0x010213, 0x0, 64 * 1024, 16, 0, 0}, + {"S25FL016A", 0x010214, 0x0, 64 * 1024, 32, 0, 0}, + {"S25FL032A", 0x010215, 0x0, 64 * 1024, 64, 0, 0}, + {"S25FL064A", 0x010216, 0x0, 64 * 1024, 128, 0, 0}, + {"S25FL128P_256K", 0x012018, 0x0300, 256 * 1024, 64, RD_CMD_FULL, 0}, + {"S25FL128P_64K", 0x012018, 0x0301, 64 * 1024, 256, RD_CMD_FULL, 0}, + {"S25FL032P", 0x010215, 0x4d00, 64 * 1024, 64, RD_CMD_FULL, 0}, + {"S25FL064P", 0x010216, 0x4d00, 64 * 1024, 128, RD_CMD_FULL, 0}, + {"S25FL128S_64K", 0x012018, 0x4d01, 64 * 1024, 256, RD_CMD_FULL, 0}, + {"S25FL256S_64K", 0x010219, 0x4d01, 64 * 1024, 512, RD_CMD_FULL, 0}, + {"S25FL512S_64K", 0x010220, 0x4d01, 64 * 1024, 1024, RD_CMD_FULL, 0}, #endif #ifdef CONFIG_SPI_FLASH_STMICRO /* STMICRO */ - {"M25P10", 0x202011, 0x0, 32 * 1024, 4, 0}, - {"M25P20", 0x202012, 0x0, 64 * 1024, 4, 0}, - {"M25P40", 0x202013, 0x0, 64 * 1024, 8, 0}, - {"M25P80", 0x202014, 0x0, 64 * 1024, 16, 0}, - {"M25P16", 0x202015, 0x0, 64 * 1024, 32, 0}, - {"M25P32", 0x202016, 0x0, 64 * 1024, 64, 0}, - {"M25P64", 0x202017, 0x0, 64 * 1024, 128, 0}, - {"M25P128", 0x202018, 0x0, 256 * 1024, 64, 0}, - {"N25Q32", 0x20ba16, 0x0, 64 * 1024, 64, SECT_4K}, - {"N25Q32A", 0x20bb16, 0x0, 64 * 1024, 64, SECT_4K}, - {"N25Q64", 0x20ba17, 0x0, 64 * 1024, 128, SECT_4K}, - {"N25Q64A", 0x20bb17, 0x0, 64 * 1024, 128, SECT_4K}, - {"N25Q128", 0x20ba18, 0x0, 64 * 1024, 256, SECT_4K}, - {"N25Q128A", 0x20bb18, 0x0, 64 * 1024, 256, SECT_4K}, - {"N25Q256", 0x20ba19, 0x0, 64 * 1024, 512, SECT_4K}, - {"N25Q256A", 0x20bb19, 0x0, 64 * 1024, 512, SECT_4K}, - {"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024, E_FSR | SECT_4K}, - {"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024, E_FSR | SECT_4K}, - {"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048, E_FSR | SECT_4K}, - {"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048, E_FSR | SECT_4K}, + {"M25P10", 0x202011, 0x0, 32 * 1024, 4, 0, 0}, + {"M25P20", 0x202012, 0x0, 64 * 1024, 4, 0, 0}, + {"M25P40", 0x202013, 0x0, 64 * 1024, 8, 0, 0}, + {"M25P80", 0x202014, 0x0, 64 * 1024, 16, 0, 0}, + {"M25P16", 0x202015, 0x0, 64 * 1024, 32, 0, 0}, + {"M25P32", 0x202016, 0x0, 64 * 1024, 64, 0, 0}, + {"M25P64", 0x202017, 0x0, 64 * 1024, 128, 0, 0}, + {"M25P128", 0x202018, 0x0, 256 * 1024, 64, 0, 0}, + {"N25Q32", 0x20ba16, 0x0, 64 * 1024, 64, RD_CMD_FULL, SECT_4K}, + {"N25Q32A", 0x20bb16, 0x0, 64 * 1024, 64, RD_CMD_FULL, SECT_4K}, + {"N25Q64", 0x20ba17, 0x0, 64 * 1024, 128, RD_CMD_FULL, SECT_4K}, + {"N25Q64A", 0x20bb17, 0x0, 64 * 1024, 128, RD_CMD_FULL, SECT_4K}, + {"N25Q128", 0x20ba18, 0x0, 64 * 1024, 256, RD_CMD_FULL, SECT_4K}, + {"N25Q128A", 0x20bb18, 0x0, 64 * 1024, 256, RD_CMD_FULL, SECT_4K}, + {"N25Q256", 0x20ba19, 0x0, 64 * 1024, 512, RD_CMD_FULL, SECT_4K}, + {"N25Q256A", 0x20bb19, 0x0, 64 * 1024, 512, RD_CMD_FULL, SECT_4K}, + {"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024, RD_CMD_FULL, E_FSR | SECT_4K}, + {"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024, RD_CMD_FULL, E_FSR | SECT_4K}, + {"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048, RD_CMD_FULL, E_FSR | SECT_4K}, + {"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048, RD_CMD_FULL, E_FSR | SECT_4K}, #endif #ifdef CONFIG_SPI_FLASH_SST /* SST */ - {"SST25VF040B", 0xbf258d, 0x0, 64 * 1024, 8, SECT_4K | SST_WP}, - {"SST25VF080B", 0xbf258e, 0x0, 64 * 1024, 16, SECT_4K | SST_WP}, - {"SST25VF016B", 0xbf2541, 0x0, 64 * 1024, 32, SECT_4K | SST_WP}, - {"SST25VF032B", 0xbf254a, 0x0, 64 * 1024, 64, SECT_4K | SST_WP}, - {"SST25VF064C", 0xbf254b, 0x0, 64 * 1024, 128, SECT_4K}, - {"SST25WF512", 0xbf2501, 0x0, 64 * 1024, 1, SECT_4K | SST_WP}, - {"SST25WF010", 0xbf2502, 0x0, 64 * 1024, 2, SECT_4K | SST_WP}, - {"SST25WF020", 0xbf2503, 0x0, 64 * 1024, 4, SECT_4K | SST_WP}, - {"SST25WF040", 0xbf2504, 0x0, 64 * 1024, 8, SECT_4K | SST_WP}, - {"SST25WF080", 0xbf2505, 0x0, 64 * 1024, 16, SECT_4K | SST_WP}, + {"SST25VF040B", 0xbf258d, 0x0, 64 * 1024, 8, 0, SECT_4K | SST_WP}, + {"SST25VF080B", 0xbf258e, 0x0, 64 * 1024, 16, 0, SECT_4K | SST_WP}, + {"SST25VF016B", 0xbf2541, 0x0, 64 * 1024, 32, 0, SECT_4K | SST_WP}, + {"SST25VF032B", 0xbf254a, 0x0, 64 * 1024, 64, 0, SECT_4K | SST_WP}, + {"SST25VF064C", 0xbf254b, 0x0, 64 * 1024, 128, 0 SECT_4K}, + {"SST25WF512", 0xbf2501, 0x0, 64 * 1024, 1, 0, SECT_4K | SST_WP}, + {"SST25WF010", 0xbf2502, 0x0, 64 * 1024, 2, 0, SECT_4K | SST_WP}, + {"SST25WF020", 0xbf2503, 0x0, 64 * 1024, 4, 0, SECT_4K | SST_WP}, + {"SST25WF040", 0xbf2504, 0x0, 64 * 1024, 8, 0, SECT_4K | SST_WP}, + {"SST25WF080", 0xbf2505, 0x0, 64 * 1024, 16, 0, SECT_4K | SST_WP}, #endif #ifdef CONFIG_SPI_FLASH_WINBOND /* WINBOND */ - {"W25P80", 0xef2014, 0x0, 64 * 1024, 16, 0}, - {"W25P16", 0xef2015, 0x0, 64 * 1024, 32, 0}, - {"W25P32", 0xef2016, 0x0, 64 * 1024, 64, 0}, - {"W25X40", 0xef3013, 0x0, 4 * 1024, 128, SECT_4K}, - {"W25X16", 0xef3015, 0x0, 4 * 1024, 512, SECT_4K}, - {"W25X32", 0xef3016, 0x0, 4 * 1024, 1024, SECT_4K}, - {"W25X64", 0xef3017, 0x0, 4 * 1024, 2048, SECT_4K}, - {"W25Q80BL", 0xef4014, 0x0, 4 * 1024, 256, SECT_4K}, - {"W25Q16CL", 0xef4015, 0x0, 4 * 1024, 512, SECT_4K}, - {"W25Q32BV", 0xef4016, 0x0, 4 * 1024, 1024, SECT_4K}, - {"W25Q64CV", 0xef4017, 0x0, 4 * 1024, 2048, SECT_4K}, - {"W25Q128BV", 0xef4018, 0x0, 4 * 1024, 4096, SECT_4K}, - {"W25Q256", 0xef4019, 0x0, 4 * 1024, 8192, SECT_4K}, - {"W25Q80BW", 0xef5014, 0x0, 4 * 1024, 256, SECT_4K}, - {"W25Q16DW", 0xef6015, 0x0, 4 * 1024, 512, SECT_4K}, - {"W25Q32DW", 0xef6016, 0x0, 4 * 1024, 1024, SECT_4K}, - {"W25Q64DW", 0xef6017, 0x0, 4 * 1024, 2048, SECT_4K}, - {"W25Q128FW", 0xef6018, 0x0, 4 * 1024, 4096, SECT_4K}, + {"W25P80", 0xef2014, 0x0, 64 * 1024, 16, 0, 0}, + {"W25P16", 0xef2015, 0x0, 64 * 1024, 32, 0, 0}, + {"W25P32", 0xef2016, 0x0, 64 * 1024, 64, 0, 0}, + {"W25X40", 0xef3013, 0x0, 4 * 1024, 128, 0, SECT_4K}, + {"W25X16", 0xef3015, 0x0, 4 * 1024, 512, 0, SECT_4K}, + {"W25X32", 0xef3016, 0x0, 4 * 1024, 1024, 0, SECT_4K}, + {"W25X64", 0xef3017, 0x0, 4 * 1024, 2048, 0, SECT_4K}, + {"W25Q80BL", 0xef4014, 0x0, 4 * 1024, 256, RD_CMD_FULL, SECT_4K}, + {"W25Q16CL", 0xef4015, 0x0, 4 * 1024, 512, RD_CMD_FULL, SECT_4K}, + {"W25Q32BV", 0xef4016, 0x0, 4 * 1024, 1024, RD_CMD_FULL, SECT_4K}, + {"W25Q64CV", 0xef4017, 0x0, 4 * 1024, 2048, RD_CMD_FULL, SECT_4K}, + {"W25Q128BV", 0xef4018, 0x0, 4 * 1024, 4096, RD_CMD_FULL, SECT_4K}, + {"W25Q256", 0xef4019, 0x0, 4 * 1024, 8192, RD_CMD_FULL, SECT_4K}, + {"W25Q80BW", 0xef5014, 0x0, 4 * 1024, 256, RD_CMD_FULL, SECT_4K}, + {"W25Q16DW", 0xef6015, 0x0, 4 * 1024, 512, RD_CMD_FULL, SECT_4K}, + {"W25Q32DW", 0xef6016, 0x0, 4 * 1024, 1024, RD_CMD_FULL, SECT_4K}, + {"W25Q64DW", 0xef6017, 0x0, 4 * 1024, 2048, RD_CMD_FULL, SECT_4K}, + {"W25Q128FW", 0xef6018, 0x0, 4 * 1024, 4096, RD_CMD_FULL, SECT_4K}, #endif /* * Note: @@ -158,6 +163,7 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode) int i; u16 jedec = idcode[1] << 8 | idcode[2]; u16 ext_jedec = idcode[3] << 8 | idcode[4]; + u8 cmd;
/* Get the flash id (jedec = manuf_id + dev_id, ext_jedec) */ for (i = 0; i < ARRAY_SIZE(spi_flash_params_table); i++) { @@ -203,6 +209,16 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode) flash->sector_size = params->sector_size; flash->size = flash->sector_size * params->nr_sectors;
+ /* Look for the fastest read cmd */ + cmd = fls(params->rd_cmd & flash->spi->rd_cmd); + if (cmd) { + cmd = spi_read_cmds_array[cmd - 1]; + flash->read_cmd = cmd; + } else { + /* Go for controller supported command */ + flash->read_cmd = flash->spi->rd_cmd; + } + /* Compute erase sector and command */ if (params->flags & SECT_4K) { flash->erase_cmd = CMD_ERASE_4K; diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ea39d1a..0ac9fab 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -7,6 +7,7 @@ #include <common.h> #include <malloc.h> #include <spi.h> +#include <spi_flash.h>
void *spi_do_alloc_slave(int offset, int size, unsigned int bus, unsigned int cs) @@ -20,6 +21,7 @@ void *spi_do_alloc_slave(int offset, int size, unsigned int bus, slave = (struct spi_slave *)(ptr + offset); slave->bus = bus; slave->cs = cs; + slave->rd_cmd = CMD_READ_ARRAY_FAST; }
return ptr; diff --git a/include/spi.h b/include/spi.h index c0dab57..093847e 100644 --- a/include/spi.h +++ b/include/spi.h @@ -40,11 +40,13 @@ * cs: ID of the chip select connected to the slave. * max_write_size: If non-zero, the maximum number of bytes which can * be written at once, excluding command bytes. + * rd_cmd: Read command. */ struct spi_slave { unsigned int bus; unsigned int cs; unsigned int max_write_size; + u8 rd_cmd; };
/*----------------------------------------------------------------------- diff --git a/include/spi_flash.h b/include/spi_flash.h index 2b1151d..e630913 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -27,6 +27,22 @@ #define SECT_32K (1 << 1) #define E_FSR (1 << 2)
+/* Read commands */ +#define CMD_READ_ARRAY_SLOW 0x03 +#define CMD_READ_ARRAY_FAST 0x0b +#define CMD_READ_DUAL_OUTPUT_FAST 0x3b +#define CMD_READ_DUAL_IO_FAST 0xbb + +enum spi_read_cmds { + ARRAY_SLOW = 1 << 0, + ARRAY_FAST = 1 << 1, + DUAL_OUTPUT_FAST = 1 << 2, + DUAL_IO_FAST = 1 << 3, +}; + +#define RD_CMD_FULL ARRAY_SLOW | ARRAY_FAST | DUAL_OUTPUT_FAST | \ + DUAL_IO_FAST + /* SST specific macros */ #ifdef CONFIG_SPI_FLASH_SST # define SST_WP 0x01 /* Supports AAI word program */ @@ -48,6 +64,7 @@ * @bank_curr: Current flash bank * @poll_cmd: Poll cmd - for flash erase/program * @erase_cmd: Erase cmd 4K, 32K, 64K + * @read_cmd: Read cmd SA, FA, DOF, DIOF * @memory_map: Address of read-only SPI flash access * @read: Flash read ops * @write: Flash write ops @@ -68,6 +85,7 @@ struct spi_flash { #endif u8 poll_cmd; u8 erase_cmd; + u8 read_cmd;
void *memory_map; int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);