Divided the spi_flash framework into mutiple parts for - spi_flash.c: spi flash core file, interaction for spi/qspi driver to spi_flash framework. - spi_flash_ops.c spi flash preffered operations, erase,write and read. - spi_flash_probe.c spi flash probing, easy to extend probing functionality.
This change will support to extend the functionality in a proper manner.
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- drivers/mtd/spi/Makefile | 2 +- drivers/mtd/spi/spi_flash.c | 569 +------------------------------------- drivers/mtd/spi/spi_flash_ops.c | 314 +++++++++++++++++++++ drivers/mtd/spi/spi_flash_probe.c | 274 ++++++++++++++++++ 4 files changed, 594 insertions(+), 565 deletions(-) create mode 100644 drivers/mtd/spi/spi_flash_ops.c create mode 100644 drivers/mtd/spi/spi_flash_probe.c
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile index e537fcf..0304b12 100644 --- a/drivers/mtd/spi/Makefile +++ b/drivers/mtd/spi/Makefile @@ -13,7 +13,7 @@ ifdef CONFIG_SPL_BUILD COBJS-$(CONFIG_SPL_SPI_LOAD) += spi_spl_load.o endif
-COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o +COBJS-$(CONFIG_SPI_FLASH) += spi_flash_probe.o spi_flash_ops.o spi_flash.o COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o COBJS-$(CONFIG_SPI_FLASH_GIGADEVICE) += gigadevice.o diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9814395..ddbdda0 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -8,23 +8,7 @@ */
#include <common.h> -#include <fdtdec.h> -#include <malloc.h> #include <spi.h> -#include <spi_flash.h> -#include <watchdog.h> - -#include "spi_flash_internal.h" - -DECLARE_GLOBAL_DATA_PTR; - -static void spi_flash_addr(u32 addr, u8 *cmd) -{ - /* cmd[0] is actual command */ - cmd[1] = addr >> 16; - cmd[2] = addr >> 8; - cmd[3] = addr >> 0; -}
static int spi_flash_read_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, @@ -52,562 +36,19 @@ static int spi_flash_read_write(struct spi_slave *spi, return ret; }
-int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len) -{ - return spi_flash_cmd_read(spi, &cmd, 1, response, len); -} - int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, void *data, size_t data_len) { return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len); }
-int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, - const void *data, size_t data_len) -{ - return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len); -} - -int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) -{ - struct spi_slave *spi = flash->spi; - unsigned long timebase; - int ret; - u8 status; - u8 check_status = 0x0; - u8 poll_bit = STATUS_WIP; - u8 cmd = flash->poll_cmd; - - if (cmd == CMD_FLAG_STATUS) { - poll_bit = STATUS_PEC; - check_status = poll_bit; - } - - ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); - if (ret) { - debug("SF: fail to read %s status register\n", - cmd == CMD_READ_STATUS ? "read" : "flag"); - return ret; - } - - timebase = get_timer(0); - do { - WATCHDOG_RESET(); - - ret = spi_xfer(spi, 8, NULL, &status, 0); - if (ret) - return -1; - - if ((status & poll_bit) == check_status) - break; - - } while (get_timer(timebase) < timeout); - - spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); - - if ((status & poll_bit) == check_status) - return 0; - - /* Timed out */ - debug("SF: time out!\n"); - return -1; -} - -int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, - size_t cmd_len, const void *buf, size_t buf_len) -{ - struct spi_slave *spi = flash->spi; - unsigned long timeout = SPI_FLASH_PROG_TIMEOUT; - int ret; - - if (buf == NULL) - timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT; - - ret = spi_claim_bus(flash->spi); - if (ret) { - debug("SF: unable to claim SPI bus\n"); - return ret; - } - - ret = spi_flash_cmd_write_enable(flash); - if (ret < 0) { - debug("SF: enabling write failed\n"); - return ret; - } - - ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len); - if (ret < 0) { - debug("SF: write cmd failed\n"); - return ret; - } - - ret = spi_flash_cmd_wait_ready(flash, timeout); - if (ret < 0) { - debug("SF: write %s timed out\n", - timeout == SPI_FLASH_PROG_TIMEOUT ? - "program" : "page erase"); - return ret; - } - - spi_release_bus(spi); - - return ret; -} - -int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len) -{ - u32 erase_size; - u8 cmd[4]; - int ret = -1; - - erase_size = flash->sector_size; - if (offset % erase_size || len % erase_size) { - debug("SF: Erase offset/length not multiple of erase size\n"); - return -1; - } - - if (erase_size == 4096) - cmd[0] = CMD_ERASE_4K; - else - cmd[0] = CMD_ERASE_64K; - - while (len) { -#ifdef CONFIG_SPI_FLASH_BAR - u8 bank_sel; - - bank_sel = offset / SPI_FLASH_16MB_BOUN; - - ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); - if (ret) { - debug("SF: fail to set bank%d\n", bank_sel); - return ret; - } -#endif - spi_flash_addr(offset, cmd); - - debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1], - cmd[2], cmd[3], offset); - - ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0); - if (ret < 0) { - debug("SF: erase failed\n"); - break; - } - - offset += erase_size; - len -= erase_size; - } - - return ret; -} - -int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, - size_t len, const void *buf) -{ - unsigned long byte_addr, page_size; - size_t chunk_len, actual; - u8 cmd[4]; - int ret = -1; - - page_size = flash->page_size; - - cmd[0] = CMD_PAGE_PROGRAM; - for (actual = 0; actual < len; actual += chunk_len) { -#ifdef CONFIG_SPI_FLASH_BAR - u8 bank_sel; - - bank_sel = offset / SPI_FLASH_16MB_BOUN; - - ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); - if (ret) { - debug("SF: fail to set bank%d\n", bank_sel); - return ret; - } -#endif - byte_addr = offset % page_size; - chunk_len = min(len - actual, page_size - byte_addr); - - if (flash->spi->max_write_size) - chunk_len = min(chunk_len, flash->spi->max_write_size); - - spi_flash_addr(offset, cmd); - - debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n", - buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); - - ret = spi_flash_write_common(flash, cmd, sizeof(cmd), - buf + actual, chunk_len); - if (ret < 0) { - debug("SF: write failed\n"); - break; - } - - offset += chunk_len; - } - - return ret; -} - -int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, - size_t cmd_len, void *data, size_t data_len) -{ - struct spi_slave *spi = flash->spi; - int ret; - - ret = spi_claim_bus(flash->spi); - if (ret) { - debug("SF: unable to claim SPI bus\n"); - return ret; - } - - ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len); - if (ret < 0) { - debug("SF: read cmd failed\n"); - return ret; - } - - spi_release_bus(spi); - - return ret; -} - -int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, - size_t len, void *data) -{ - u8 cmd[5], bank_sel = 0; - u32 remain_len, read_len; - int ret = -1; - - /* Handle memory-mapped SPI */ - if (flash->memory_map) { - memcpy(data, flash->memory_map + offset, len); - return 0; - } - - cmd[0] = CMD_READ_ARRAY_FAST; - cmd[4] = 0x00; - - while (len) { -#ifdef CONFIG_SPI_FLASH_BAR - bank_sel = offset / SPI_FLASH_16MB_BOUN; - - ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); - if (ret) { - debug("SF: fail to set bank%d\n", bank_sel); - return ret; - } -#endif - remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset); - if (len < remain_len) - read_len = len; - else - read_len = remain_len; - - spi_flash_addr(offset, cmd); - - ret = spi_flash_read_common(flash, cmd, sizeof(cmd), - data, read_len); - if (ret < 0) { - debug("SF: read failed\n"); - break; - } - - offset += read_len; - len -= read_len; - data += read_len; - } - - return ret; -} - -int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) -{ - u8 cmd; - int ret; - - cmd = CMD_WRITE_STATUS; - ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1); - if (ret < 0) { - debug("SF: fail to write status register\n"); - return ret; - } - - return 0; -} - -#ifdef CONFIG_SPI_FLASH_BAR -int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) -{ - u8 cmd; - int ret; - - if (flash->bank_curr == bank_sel) { - debug("SF: not require to enable bank%d\n", bank_sel); - return 0; - } - - cmd = flash->bank_write_cmd; - ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1); - if (ret < 0) { - debug("SF: fail to write bank register\n"); - return ret; - } - flash->bank_curr = bank_sel; - - return 0; -} - -int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0) -{ - u8 cmd; - u8 curr_bank = 0; - - /* discover bank cmds */ - switch (idcode0) { - case SPI_FLASH_SPANSION_IDCODE0: - flash->bank_read_cmd = CMD_BANKADDR_BRRD; - flash->bank_write_cmd = CMD_BANKADDR_BRWR; - break; - case SPI_FLASH_STMICRO_IDCODE0: - case SPI_FLASH_WINBOND_IDCODE0: - flash->bank_read_cmd = CMD_EXTNADDR_RDEAR; - flash->bank_write_cmd = CMD_EXTNADDR_WREAR; - break; - default: - printf("SF: Unsupported bank commands %02x\n", idcode0); - return -1; - } - - /* read the bank reg - on which bank the flash is in currently */ - cmd = flash->bank_read_cmd; - if (flash->size > SPI_FLASH_16MB_BOUN) { - if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) { - debug("SF: fail to read bank addr register\n"); - return -1; - } - flash->bank_curr = curr_bank; - } else { - flash->bank_curr = curr_bank; - } - - return 0; -} -#endif - -#ifdef CONFIG_OF_CONTROL -int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash) -{ - fdt_addr_t addr; - fdt_size_t size; - int node; - - /* If there is no node, do nothing */ - node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH); - if (node < 0) - return 0; - - addr = fdtdec_get_addr_size(blob, node, "memory-map", &size); - if (addr == FDT_ADDR_T_NONE) { - debug("%s: Cannot decode address\n", __func__); - return 0; - } - - if (flash->size != size) { - debug("%s: Memory map must cover entire device\n", __func__); - return -1; - } - flash->memory_map = (void *)addr; - - return 0; -} -#endif /* CONFIG_OF_CONTROL */ - -/* - * The following table holds all device probe functions - * - * shift: number of continuation bytes before the ID - * idcode: the expected IDCODE or 0xff for non JEDEC devices - * probe: the function to call - * - * Non JEDEC devices should be ordered in the table such that - * the probe functions with best detection algorithms come first. - * - * Several matching entries are permitted, they will be tried - * in sequence until a probe function returns non NULL. - * - * IDCODE_CONT_LEN may be redefined if a device needs to declare a - * larger "shift" value. IDCODE_PART_LEN generally shouldn't be - * changed. This is the max number of bytes probe functions may - * examine when looking up part-specific identification info. - * - * Probe functions will be given the idcode buffer starting at their - * manu id byte (the "idcode" in the table below). In other words, - * all of the continuation bytes will be skipped (the "shift" below). - */ -#define IDCODE_CONT_LEN 0 -#define IDCODE_PART_LEN 5 -static const struct { - const u8 shift; - const u8 idcode; - struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode); -} flashes[] = { - /* Keep it sorted by define name */ -#ifdef CONFIG_SPI_FLASH_ATMEL - { 0, 0x1f, spi_flash_probe_atmel, }, -#endif -#ifdef CONFIG_SPI_FLASH_EON - { 0, 0x1c, spi_flash_probe_eon, }, -#endif -#ifdef CONFIG_SPI_FLASH_GIGADEVICE - { 0, 0xc8, spi_flash_probe_gigadevice, }, -#endif -#ifdef CONFIG_SPI_FLASH_MACRONIX - { 0, 0xc2, spi_flash_probe_macronix, }, -#endif -#ifdef CONFIG_SPI_FLASH_SPANSION - { 0, 0x01, spi_flash_probe_spansion, }, -#endif -#ifdef CONFIG_SPI_FLASH_SST - { 0, 0xbf, spi_flash_probe_sst, }, -#endif -#ifdef CONFIG_SPI_FLASH_STMICRO - { 0, 0x20, spi_flash_probe_stmicro, }, -#endif -#ifdef CONFIG_SPI_FLASH_WINBOND - { 0, 0xef, spi_flash_probe_winbond, }, -#endif -#ifdef CONFIG_SPI_FRAM_RAMTRON - { 6, 0xc2, spi_fram_probe_ramtron, }, -# undef IDCODE_CONT_LEN -# define IDCODE_CONT_LEN 6 -#endif - /* Keep it sorted by best detection */ -#ifdef CONFIG_SPI_FLASH_STMICRO - { 0, 0xff, spi_flash_probe_stmicro, }, -#endif -#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC - { 0, 0xff, spi_fram_probe_ramtron, }, -#endif -}; -#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN) - -struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int spi_mode) -{ - struct spi_slave *spi; - struct spi_flash *flash = NULL; - int ret, i, shift; - u8 idcode[IDCODE_LEN], *idp; - - spi = spi_setup_slave(bus, cs, max_hz, spi_mode); - if (!spi) { - printf("SF: Failed to set up slave\n"); - return NULL; - } - - ret = spi_claim_bus(spi); - if (ret) { - debug("SF: Failed to claim SPI bus: %d\n", ret); - goto err_claim_bus; - } - - /* Read the ID codes */ - ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode)); - if (ret) - goto err_read_id; - -#ifdef DEBUG - printf("SF: Got idcodes\n"); - print_buffer(0, idcode, 1, sizeof(idcode), 0); -#endif - - /* count the number of continuation bytes */ - for (shift = 0, idp = idcode; - shift < IDCODE_CONT_LEN && *idp == 0x7f; - ++shift, ++idp) - continue; - - /* search the table for matches in shift and id */ - for (i = 0; i < ARRAY_SIZE(flashes); ++i) - if (flashes[i].shift == shift && flashes[i].idcode == *idp) { - /* we have a match, call probe */ - flash = flashes[i].probe(spi, idp); - if (flash) - break; - } - - if (!flash) { - printf("SF: Unsupported manufacturer %02x\n", *idp); - goto err_manufacturer_probe; - } - -#ifdef CONFIG_SPI_FLASH_BAR - /* Configure the BAR - disover bank cmds and read current bank */ - ret = spi_flash_bank_config(flash, *idp); - if (ret < 0) - goto err_manufacturer_probe; -#endif - -#ifdef CONFIG_OF_CONTROL - if (spi_flash_decode_fdt(gd->fdt_blob, flash)) { - debug("SF: FDT decode error\n"); - goto err_manufacturer_probe; - } -#endif - printf("SF: Detected %s with page size ", flash->name); - print_size(flash->sector_size, ", total "); - print_size(flash->size, ""); - if (flash->memory_map) - printf(", mapped at %p", flash->memory_map); - puts("\n"); -#ifndef CONFIG_SPI_FLASH_BAR - if (flash->size > SPI_FLASH_16MB_BOUN) { - puts("SF: Warning - Only lower 16MiB accessible,"); - puts(" Full access #define CONFIG_SPI_FLASH_BAR\n"); - } -#endif - - spi_release_bus(spi); - - return flash; - -err_manufacturer_probe: -err_read_id: - spi_release_bus(spi); -err_claim_bus: - spi_free_slave(spi); - return NULL; -} - -void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi, - const char *name) +int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len) { - struct spi_flash *flash; - void *ptr; - - ptr = malloc(size); - if (!ptr) { - debug("SF: Failed to allocate memory\n"); - return NULL; - } - memset(ptr, '\0', size); - flash = (struct spi_flash *)(ptr + offset); - - /* Set up some basic fields - caller will sort out sizes */ - flash->spi = spi; - flash->name = name; - flash->poll_cmd = CMD_READ_STATUS; - - flash->read = spi_flash_cmd_read_fast; - flash->write = spi_flash_cmd_write_multi; - flash->erase = spi_flash_cmd_erase; - - return flash; + return spi_flash_cmd_read(spi, &cmd, 1, response, len); }
-void spi_flash_free(struct spi_flash *flash) +int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, + const void *data, size_t data_len) { - spi_free_slave(flash->spi); - free(flash); + return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len); } diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c new file mode 100644 index 0000000..1538bf3 --- /dev/null +++ b/drivers/mtd/spi/spi_flash_ops.c @@ -0,0 +1,314 @@ +/* + * SPI flash operations + * + * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <common.h> +#include <spi.h> +#include <spi_flash.h> +#include <watchdog.h> + +#include "spi_flash_internal.h" + +static void spi_flash_addr(u32 addr, u8 *cmd) +{ + /* cmd[0] is actual command */ + cmd[1] = addr >> 16; + cmd[2] = addr >> 8; + cmd[3] = addr >> 0; +} + +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) +{ + struct spi_slave *spi = flash->spi; + unsigned long timebase; + int ret; + u8 status; + u8 check_status = 0x0; + u8 poll_bit = STATUS_WIP; + u8 cmd = flash->poll_cmd; + + if (cmd == CMD_FLAG_STATUS) { + poll_bit = STATUS_PEC; + check_status = poll_bit; + } + + ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); + if (ret) { + debug("SF: fail to read %s status register\n", + cmd == CMD_READ_STATUS ? "read" : "flag"); + return ret; + } + + timebase = get_timer(0); + do { + WATCHDOG_RESET(); + + ret = spi_xfer(spi, 8, NULL, &status, 0); + if (ret) + return -1; + + if ((status & poll_bit) == check_status) + break; + + } while (get_timer(timebase) < timeout); + + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if ((status & poll_bit) == check_status) + return 0; + + /* Timed out */ + debug("SF: time out!\n"); + return -1; +} + +int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, const void *buf, size_t buf_len) +{ + struct spi_slave *spi = flash->spi; + unsigned long timeout = SPI_FLASH_PROG_TIMEOUT; + int ret; + + if (buf == NULL) + timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT; + + ret = spi_claim_bus(flash->spi); + if (ret) { + debug("SF: unable to claim SPI bus\n"); + return ret; + } + + ret = spi_flash_cmd_write_enable(flash); + if (ret < 0) { + debug("SF: enabling write failed\n"); + return ret; + } + + ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len); + if (ret < 0) { + debug("SF: write cmd failed\n"); + return ret; + } + + ret = spi_flash_cmd_wait_ready(flash, timeout); + if (ret < 0) { + debug("SF: write %s timed out\n", + timeout == SPI_FLASH_PROG_TIMEOUT ? + "program" : "page erase"); + return ret; + } + + spi_release_bus(spi); + + return ret; +} + +int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + u32 erase_size; + u8 cmd[4]; + int ret = -1; + + erase_size = flash->sector_size; + if (offset % erase_size || len % erase_size) { + debug("SF: Erase offset/length not multiple of erase size\n"); + return -1; + } + + if (erase_size == 4096) + cmd[0] = CMD_ERASE_4K; + else + cmd[0] = CMD_ERASE_64K; + + while (len) { +#ifdef CONFIG_SPI_FLASH_BAR + u8 bank_sel; + + bank_sel = offset / SPI_FLASH_16MB_BOUN; + + ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); + if (ret) { + debug("SF: fail to set bank%d\n", bank_sel); + return ret; + } +#endif + spi_flash_addr(offset, cmd); + + debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1], + cmd[2], cmd[3], offset); + + ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0); + if (ret < 0) { + debug("SF: erase failed\n"); + break; + } + + offset += erase_size; + len -= erase_size; + } + + return ret; +} + +int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, + size_t len, const void *buf) +{ + unsigned long byte_addr, page_size; + size_t chunk_len, actual; + u8 cmd[4]; + int ret = -1; + + page_size = flash->page_size; + + cmd[0] = CMD_PAGE_PROGRAM; + for (actual = 0; actual < len; actual += chunk_len) { +#ifdef CONFIG_SPI_FLASH_BAR + u8 bank_sel; + + bank_sel = offset / SPI_FLASH_16MB_BOUN; + + ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); + if (ret) { + debug("SF: fail to set bank%d\n", bank_sel); + return ret; + } +#endif + byte_addr = offset % page_size; + chunk_len = min(len - actual, page_size - byte_addr); + + if (flash->spi->max_write_size) + chunk_len = min(chunk_len, flash->spi->max_write_size); + + spi_flash_addr(offset, cmd); + + debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n", + buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); + + ret = spi_flash_write_common(flash, cmd, sizeof(cmd), + buf + actual, chunk_len); + if (ret < 0) { + debug("SF: write failed\n"); + break; + } + + offset += chunk_len; + } + + return ret; +} + +int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len) +{ + struct spi_slave *spi = flash->spi; + int ret; + + ret = spi_claim_bus(flash->spi); + if (ret) { + debug("SF: unable to claim SPI bus\n"); + return ret; + } + + ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len); + if (ret < 0) { + debug("SF: read cmd failed\n"); + return ret; + } + + spi_release_bus(spi); + + return ret; +} + +int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, + size_t len, void *data) +{ + u8 cmd[5], bank_sel = 0; + u32 remain_len, read_len; + int ret = -1; + + /* Handle memory-mapped SPI */ + if (flash->memory_map) { + memcpy(data, flash->memory_map + offset, len); + return 0; + } + + cmd[0] = CMD_READ_ARRAY_FAST; + cmd[4] = 0x00; + + while (len) { +#ifdef CONFIG_SPI_FLASH_BAR + bank_sel = offset / SPI_FLASH_16MB_BOUN; + + ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); + if (ret) { + debug("SF: fail to set bank%d\n", bank_sel); + return ret; + } +#endif + remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset); + if (len < remain_len) + read_len = len; + else + read_len = remain_len; + + spi_flash_addr(offset, cmd); + + ret = spi_flash_read_common(flash, cmd, sizeof(cmd), + data, read_len); + if (ret < 0) { + debug("SF: read failed\n"); + break; + } + + offset += read_len; + len -= read_len; + data += read_len; + } + + return ret; +} + +int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) +{ + u8 cmd; + int ret; + + cmd = CMD_WRITE_STATUS; + ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1); + if (ret < 0) { + debug("SF: fail to write status register\n"); + return ret; + } + + return 0; +} + +#ifdef CONFIG_SPI_FLASH_BAR +int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) +{ + u8 cmd; + int ret; + + if (flash->bank_curr == bank_sel) { + debug("SF: not require to enable bank%d\n", bank_sel); + return 0; + } + + cmd = flash->bank_write_cmd; + ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1); + if (ret < 0) { + debug("SF: fail to write bank register\n"); + return ret; + } + flash->bank_curr = bank_sel; + + return 0; +} +#endif diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c new file mode 100644 index 0000000..fedc81e --- /dev/null +++ b/drivers/mtd/spi/spi_flash_probe.c @@ -0,0 +1,274 @@ +/* + * SPI flash probing + * + * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <common.h> +#include <fdtdec.h> +#include <malloc.h> +#include <spi.h> +#include <spi_flash.h> + +#include "spi_flash_internal.h" + +DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_SPI_FLASH_BAR +int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0) +{ + u8 cmd; + u8 curr_bank = 0; + + /* discover bank cmds */ + switch (idcode0) { + case SPI_FLASH_SPANSION_IDCODE0: + flash->bank_read_cmd = CMD_BANKADDR_BRRD; + flash->bank_write_cmd = CMD_BANKADDR_BRWR; + break; + case SPI_FLASH_STMICRO_IDCODE0: + case SPI_FLASH_WINBOND_IDCODE0: + flash->bank_read_cmd = CMD_EXTNADDR_RDEAR; + flash->bank_write_cmd = CMD_EXTNADDR_WREAR; + break; + default: + printf("SF: Unsupported bank commands %02x\n", idcode0); + return -1; + } + + /* read the bank reg - on which bank the flash is in currently */ + cmd = flash->bank_read_cmd; + if (flash->size > SPI_FLASH_16MB_BOUN) { + if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) { + debug("SF: fail to read bank addr register\n"); + return -1; + } + flash->bank_curr = curr_bank; + } else { + flash->bank_curr = curr_bank; + } + + return 0; +} +#endif + +#ifdef CONFIG_OF_CONTROL +int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash) +{ + fdt_addr_t addr; + fdt_size_t size; + int node; + + /* If there is no node, do nothing */ + node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH); + if (node < 0) + return 0; + + addr = fdtdec_get_addr_size(blob, node, "memory-map", &size); + if (addr == FDT_ADDR_T_NONE) { + debug("%s: Cannot decode address\n", __func__); + return 0; + } + + if (flash->size != size) { + debug("%s: Memory map must cover entire device\n", __func__); + return -1; + } + flash->memory_map = (void *)addr; + + return 0; +} +#endif /* CONFIG_OF_CONTROL */ + +/* + * The following table holds all device probe functions + * + * shift: number of continuation bytes before the ID + * idcode: the expected IDCODE or 0xff for non JEDEC devices + * probe: the function to call + * + * Non JEDEC devices should be ordered in the table such that + * the probe functions with best detection algorithms come first. + * + * Several matching entries are permitted, they will be tried + * in sequence until a probe function returns non NULL. + * + * IDCODE_CONT_LEN may be redefined if a device needs to declare a + * larger "shift" value. IDCODE_PART_LEN generally shouldn't be + * changed. This is the max number of bytes probe functions may + * examine when looking up part-specific identification info. + * + * Probe functions will be given the idcode buffer starting at their + * manu id byte (the "idcode" in the table below). In other words, + * all of the continuation bytes will be skipped (the "shift" below). + */ +#define IDCODE_CONT_LEN 0 +#define IDCODE_PART_LEN 5 +static const struct { + const u8 shift; + const u8 idcode; + struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode); +} flashes[] = { + /* Keep it sorted by define name */ +#ifdef CONFIG_SPI_FLASH_ATMEL + { 0, 0x1f, spi_flash_probe_atmel, }, +#endif +#ifdef CONFIG_SPI_FLASH_EON + { 0, 0x1c, spi_flash_probe_eon, }, +#endif +#ifdef CONFIG_SPI_FLASH_GIGADEVICE + { 0, 0xc8, spi_flash_probe_gigadevice, }, +#endif +#ifdef CONFIG_SPI_FLASH_MACRONIX + { 0, 0xc2, spi_flash_probe_macronix, }, +#endif +#ifdef CONFIG_SPI_FLASH_SPANSION + { 0, 0x01, spi_flash_probe_spansion, }, +#endif +#ifdef CONFIG_SPI_FLASH_SST + { 0, 0xbf, spi_flash_probe_sst, }, +#endif +#ifdef CONFIG_SPI_FLASH_STMICRO + { 0, 0x20, spi_flash_probe_stmicro, }, +#endif +#ifdef CONFIG_SPI_FLASH_WINBOND + { 0, 0xef, spi_flash_probe_winbond, }, +#endif +#ifdef CONFIG_SPI_FRAM_RAMTRON + { 6, 0xc2, spi_fram_probe_ramtron, }, +# undef IDCODE_CONT_LEN +# define IDCODE_CONT_LEN 6 +#endif + /* Keep it sorted by best detection */ +#ifdef CONFIG_SPI_FLASH_STMICRO + { 0, 0xff, spi_flash_probe_stmicro, }, +#endif +#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC + { 0, 0xff, spi_fram_probe_ramtron, }, +#endif +}; +#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN) + +struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int spi_mode) +{ + struct spi_slave *spi; + struct spi_flash *flash = NULL; + int ret, i, shift; + u8 idcode[IDCODE_LEN], *idp; + + spi = spi_setup_slave(bus, cs, max_hz, spi_mode); + if (!spi) { + printf("SF: Failed to set up slave\n"); + return NULL; + } + + ret = spi_claim_bus(spi); + if (ret) { + debug("SF: Failed to claim SPI bus: %d\n", ret); + goto err_claim_bus; + } + + /* Read the ID codes */ + ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode)); + if (ret) + goto err_read_id; + +#ifdef DEBUG + printf("SF: Got idcodes\n"); + print_buffer(0, idcode, 1, sizeof(idcode), 0); +#endif + + /* count the number of continuation bytes */ + for (shift = 0, idp = idcode; + shift < IDCODE_CONT_LEN && *idp == 0x7f; + ++shift, ++idp) + continue; + + /* search the table for matches in shift and id */ + for (i = 0; i < ARRAY_SIZE(flashes); ++i) + if (flashes[i].shift == shift && flashes[i].idcode == *idp) { + /* we have a match, call probe */ + flash = flashes[i].probe(spi, idp); + if (flash) + break; + } + + if (!flash) { + printf("SF: Unsupported manufacturer %02x\n", *idp); + goto err_manufacturer_probe; + } + +#ifdef CONFIG_SPI_FLASH_BAR + /* Configure the BAR - disover bank cmds and read current bank */ + ret = spi_flash_bank_config(flash, *idp); + if (ret < 0) + goto err_manufacturer_probe; +#endif + +#ifdef CONFIG_OF_CONTROL + if (spi_flash_decode_fdt(gd->fdt_blob, flash)) { + debug("SF: FDT decode error\n"); + goto err_manufacturer_probe; + } +#endif + printf("SF: Detected %s with page size ", flash->name); + print_size(flash->sector_size, ", total "); + print_size(flash->size, ""); + if (flash->memory_map) + printf(", mapped at %p", flash->memory_map); + puts("\n"); +#ifndef CONFIG_SPI_FLASH_BAR + if (flash->size > SPI_FLASH_16MB_BOUN) { + puts("SF: Warning - Only lower 16MiB accessible,"); + puts(" Full access #define CONFIG_SPI_FLASH_BAR\n"); + } +#endif + + spi_release_bus(spi); + + return flash; + +err_manufacturer_probe: +err_read_id: + spi_release_bus(spi); +err_claim_bus: + spi_free_slave(spi); + return NULL; +} + +void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi, + const char *name) +{ + struct spi_flash *flash; + void *ptr; + + ptr = malloc(size); + if (!ptr) { + debug("SF: Failed to allocate memory\n"); + return NULL; + } + memset(ptr, '\0', size); + flash = (struct spi_flash *)(ptr + offset); + + /* Set up some basic fields - caller will sort out sizes */ + flash->spi = spi; + flash->name = name; + flash->poll_cmd = CMD_READ_STATUS; + + flash->read = spi_flash_cmd_read_fast; + flash->write = spi_flash_cmd_write_multi; + flash->erase = spi_flash_cmd_erase; + + return flash; +} + +void spi_flash_free(struct spi_flash *flash) +{ + spi_free_slave(flash->spi); + free(flash); +}