#include "spi_flash_internal.h"
/* M25Pxx-specific commands */
-#define CMD_M25PXX_WREN 0x06 /* Write Enable */
-#define CMD_M25PXX_WRDI 0x04 /* Write Disable */
-#define CMD_M25PXX_RDSR 0x05 /* Read Status Register */
-#define CMD_M25PXX_WRSR 0x01 /* Write Status Register */
-#define CMD_M25PXX_READ 0x03 /* Read Data Bytes */
-#define CMD_M25PXX_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */
-#define CMD_M25PXX_PP 0x02 /* Page Program */
-#define CMD_M25PXX_SE 0xd8 /* Sector Erase */
-#define CMD_M25PXX_BE 0xc7 /* Bulk Erase */
-#define CMD_M25PXX_DP 0xb9 /* Deep Power-down */
#define CMD_M25PXX_RES 0xab /* Release from DP, and Read Signature */
-#define STM_ID_M25P16 0x15
-#define STM_ID_M25P20 0x12
-#define STM_ID_M25P32 0x16
-#define STM_ID_M25P40 0x13
-#define STM_ID_M25P64 0x17
-#define STM_ID_M25P80 0x14
-#define STM_ID_M25P128 0x18
-
-#define STMICRO_SR_WIP (1 << 0) /* Write-in-Progress */
-
struct stmicro_spi_flash_params {
- u8 idcode1;
- u16 page_size;
+ u16 id;
u16 pages_per_sector;
u16 nr_sectors;
const char *name;
};
-/* spi_flash needs to be first so upper layers can free() it */
-struct stmicro_spi_flash {
- struct spi_flash flash;
- const struct stmicro_spi_flash_params *params;
-};
-
-static inline struct stmicro_spi_flash *to_stmicro_spi_flash(struct spi_flash
- *flash)
-{
- return container_of(flash, struct stmicro_spi_flash, flash);
-}
-
static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
{
- .idcode1 = STM_ID_M25P16,
- .page_size = 256,
+ .id = 0x2011,
+ .pages_per_sector = 128,
+ .nr_sectors = 4,
+ .name = "M25P10",
+ },
+ {
+ .id = 0x2015,
.pages_per_sector = 256,
.nr_sectors = 32,
.name = "M25P16",
},
{
- .idcode1 = STM_ID_M25P20,
- .page_size = 256,
+ .id = 0x2012,
.pages_per_sector = 256,
.nr_sectors = 4,
.name = "M25P20",
},
{
- .idcode1 = STM_ID_M25P32,
- .page_size = 256,
+ .id = 0x2016,
.pages_per_sector = 256,
.nr_sectors = 64,
.name = "M25P32",
},
{
- .idcode1 = STM_ID_M25P40,
- .page_size = 256,
+ .id = 0x2013,
.pages_per_sector = 256,
.nr_sectors = 8,
.name = "M25P40",
},
{
- .idcode1 = STM_ID_M25P64,
- .page_size = 256,
+ .id = 0x2017,
.pages_per_sector = 256,
.nr_sectors = 128,
.name = "M25P64",
},
{
- .idcode1 = STM_ID_M25P80,
- .page_size = 256,
+ .id = 0x2014,
.pages_per_sector = 256,
.nr_sectors = 16,
.name = "M25P80",
},
{
- .idcode1 = STM_ID_M25P128,
- .page_size = 256,
+ .id = 0x2018,
.pages_per_sector = 1024,
.nr_sectors = 64,
.name = "M25P128",
},
+ {
+ .id = 0xba16,
+ .pages_per_sector = 256,
+ .nr_sectors = 64,
+ .name = "N25Q32",
+ },
+ {
+ .id = 0xbb16,
+ .pages_per_sector = 256,
+ .nr_sectors = 64,
+ .name = "N25Q32A",
+ },
+ {
+ .id = 0xba17,
+ .pages_per_sector = 256,
+ .nr_sectors = 128,
+ .name = "N25Q064",
+ },
+ {
+ .id = 0xbb17,
+ .pages_per_sector = 256,
+ .nr_sectors = 128,
+ .name = "N25Q64A",
+ },
+ {
+ .id = 0xba18,
+ .pages_per_sector = 256,
+ .nr_sectors = 256,
+ .name = "N25Q128",
+ },
+ {
+ .id = 0xbb18,
+ .pages_per_sector = 256,
+ .nr_sectors = 256,
+ .name = "N25Q128A",
+ },
+ {
+ .id = 0xba19,
+ .pages_per_sector = 256,
+ .nr_sectors = 512,
+ .name = "N25Q256",
+ },
+ {
+ .id = 0xbb19,
+ .pages_per_sector = 256,
+ .nr_sectors = 512,
+ .name = "N25Q256A",
+ },
};
-static int stmicro_wait_ready(struct spi_flash *flash, unsigned long timeout)
-{
- struct spi_slave *spi = flash->spi;
- unsigned long timebase;
- int ret;
- u8 cmd = CMD_M25PXX_RDSR;
- u8 status;
-
- ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
- if (ret) {
- debug("SF: Failed to send command %02x: %d\n", cmd, ret);
- return ret;
- }
-
- timebase = get_timer(0);
- do {
- ret = spi_xfer(spi, 8, NULL, &status, 0);
- if (ret)
- return -1;
-
- if ((status & STMICRO_SR_WIP) == 0)
- break;
-
- } while (get_timer(timebase) < timeout);
-
- spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
-
- if ((status & STMICRO_SR_WIP) == 0)
- return 0;
-
- /* Timed out */
- return -1;
-}
-
-static int stmicro_read_fast(struct spi_flash *flash,
- u32 offset, size_t len, void *buf)
-{
- struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
- unsigned long page_addr;
- unsigned long page_size;
- u8 cmd[5];
-
- page_size = stm->params->page_size;
- page_addr = offset / page_size;
-
- cmd[0] = CMD_READ_ARRAY_FAST;
- cmd[1] = page_addr >> 8;
- cmd[2] = page_addr;
- cmd[3] = offset % page_size;
- cmd[4] = 0x00;
-
- return spi_flash_read_common(flash, cmd, sizeof(cmd), buf, len);
-}
-
-static int stmicro_write(struct spi_flash *flash,
- u32 offset, size_t len, const void *buf)
-{
- struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
- unsigned long page_addr;
- unsigned long byte_addr;
- unsigned long page_size;
- size_t chunk_len;
- size_t actual;
- int ret;
- u8 cmd[4];
-
- page_size = stm->params->page_size;
- page_addr = offset / page_size;
- byte_addr = offset % page_size;
-
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: Unable to claim SPI bus\n");
- return ret;
- }
-
- ret = 0;
- for (actual = 0; actual < len; actual += chunk_len) {
- chunk_len = min(len - actual, page_size - byte_addr);
-
- cmd[0] = CMD_M25PXX_PP;
- cmd[1] = page_addr >> 8;
- cmd[2] = page_addr;
- cmd[3] = byte_addr;
-
- debug
- ("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %d\n",
- buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
-
- ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0);
- if (ret < 0) {
- debug("SF: Enabling Write failed\n");
- break;
- }
-
- ret = spi_flash_cmd_write(flash->spi, cmd, 4,
- buf + actual, chunk_len);
- if (ret < 0) {
- debug("SF: STMicro Page Program failed\n");
- break;
- }
-
- ret = stmicro_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
- if (ret < 0) {
- debug("SF: STMicro page programming timed out\n");
- break;
- }
-
- page_addr++;
- byte_addr = 0;
- }
-
- debug("SF: STMicro: Successfully programmed %u bytes @ 0x%x\n",
- len, offset);
-
- spi_release_bus(flash->spi);
- return ret;
-}
-
-int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
- struct stmicro_spi_flash *stm = to_stmicro_spi_flash(flash);
- unsigned long sector_size;
- size_t actual;
- int ret;
- u8 cmd[4];
-
- /*
- * This function currently uses sector erase only.
- * probably speed things up by using bulk erase
- * when possible.
- */
-
- sector_size = stm->params->page_size * stm->params->pages_per_sector;
-
- if (offset % sector_size || len % sector_size) {
- debug("SF: Erase offset/length not multiple of sector size\n");
- return -1;
- }
-
- len /= sector_size;
- cmd[0] = CMD_M25PXX_SE;
- cmd[2] = 0x00;
- cmd[3] = 0x00;
-
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: Unable to claim SPI bus\n");
- return ret;
- }
-
- ret = 0;
- for (actual = 0; actual < len; actual++) {
- cmd[1] = (offset / sector_size) + actual;
-
- ret = spi_flash_cmd(flash->spi, CMD_M25PXX_WREN, NULL, 0);
- if (ret < 0) {
- debug("SF: Enabling Write failed\n");
- break;
- }
-
- ret = spi_flash_cmd_write(flash->spi, cmd, 4, NULL, 0);
- if (ret < 0) {
- debug("SF: STMicro page erase failed\n");
- break;
- }
-
- ret = stmicro_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
- if (ret < 0) {
- debug("SF: STMicro page erase timed out\n");
- break;
- }
- }
-
- debug("SF: STMicro: Successfully erased %u bytes @ 0x%x\n",
- len * sector_size, offset);
-
- spi_release_bus(flash->spi);
- return ret;
-}
-
struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
{
const struct stmicro_spi_flash_params *params;
- struct stmicro_spi_flash *stm;
+ struct spi_flash *flash;
unsigned int i;
+ u16 id;
+
+ if (idcode[0] == 0xff) {
+ i = spi_flash_cmd(spi, CMD_M25PXX_RES,
+ idcode, 4);
+ if (i)
+ return NULL;
+ if ((idcode[3] & 0xf0) == 0x10) {
+ idcode[0] = 0x20;
+ idcode[1] = 0x20;
+ idcode[2] = idcode[3] + 1;
+ } else
+ return NULL;
+ }
+
+ id = ((idcode[1] << 8) | idcode[2]);
for (i = 0; i < ARRAY_SIZE(stmicro_spi_flash_table); i++) {
params = &stmicro_spi_flash_table[i];
- if (params->idcode1 == idcode[2]) {
+ if (params->id == id) {
break;
}
}
if (i == ARRAY_SIZE(stmicro_spi_flash_table)) {
- debug("SF: Unsupported STMicro ID %02x\n", idcode[1]);
+ debug("SF: Unsupported STMicro ID %04x\n", id);
return NULL;
}
- stm = malloc(sizeof(struct stmicro_spi_flash));
- if (!stm) {
+ flash = spi_flash_alloc_base(spi, params->name);
+ if (!flash) {
debug("SF: Failed to allocate memory\n");
return NULL;
}
- stm->params = params;
- stm->flash.spi = spi;
- stm->flash.name = params->name;
-
- stm->flash.write = stmicro_write;
- stm->flash.erase = stmicro_erase;
- stm->flash.read = stmicro_read_fast;
- stm->flash.size = params->page_size * params->pages_per_sector
- * params->nr_sectors;
-
- debug("SF: Detected %s with page size %u, total %u bytes\n",
- params->name, params->page_size, stm->flash.size);
+ flash->page_size = 256;
+ flash->sector_size = 256 * params->pages_per_sector;
+ flash->size = flash->sector_size * params->nr_sectors;
- return &stm->flash;
+ return flash;
}
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