X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmtd%2Fspi%2Fspi_flash.c;h=ddbdda0dc2992310e0f724c7445c982ba85d5fec;hb=af1679bc30b11b90f9f6650d211b3fe350f4044f;hp=b4ba1dda51dc4fee48116841f702d17787e11787;hpb=6ca803750e1e08fce26e508f1c35170bf9259bb4;p=u-boot diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index b4ba1dda51..ddbdda0dc2 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -8,61 +8,12 @@ */ #include -#include #include -#include -#include "spi_flash_internal.h" - -int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len) -{ - unsigned long flags = SPI_XFER_BEGIN; - int ret; - - if (len == 0) - flags |= SPI_XFER_END; - - ret = spi_xfer(spi, 8, &cmd, NULL, flags); - if (ret) { - debug("SF: Failed to send command %02x: %d\n", cmd, ret); - return ret; - } - - if (len) { - ret = spi_xfer(spi, len * 8, NULL, response, SPI_XFER_END); - if (ret) - debug("SF: Failed to read response (%zu bytes): %d\n", - len, ret); - } - - return ret; -} - -int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, - size_t cmd_len, void *data, size_t data_len) -{ - unsigned long flags = SPI_XFER_BEGIN; - int ret; - - if (data_len == 0) - flags |= SPI_XFER_END; - - ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); - if (ret) { - debug("SF: Failed to send read command (%zu bytes): %d\n", - cmd_len, ret); - } else if (data_len != 0) { - ret = spi_xfer(spi, data_len * 8, NULL, data, SPI_XFER_END); - if (ret) - debug("SF: Failed to read %zu bytes of data: %d\n", - data_len, ret); - } - - return ret; -} - -int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, - const void *data, size_t data_len) +static int spi_flash_read_write(struct spi_slave *spi, + const u8 *cmd, size_t cmd_len, + const u8 *data_out, u8 *data_in, + size_t data_len) { unsigned long flags = SPI_XFER_BEGIN; int ret; @@ -72,151 +23,32 @@ int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); if (ret) { - debug("SF: Failed to send read command (%zu bytes): %d\n", - cmd_len, ret); + debug("SF: Failed to send command (%zu bytes): %d\n", + cmd_len, ret); } else if (data_len != 0) { - ret = spi_xfer(spi, data_len * 8, data, NULL, SPI_XFER_END); + ret = spi_xfer(spi, data_len * 8, data_out, data_in, + SPI_XFER_END); if (ret) - debug("SF: Failed to read %zu bytes of data: %d\n", - data_len, ret); + debug("SF: Failed to transfer %zu bytes of data: %d\n", + data_len, ret); } return ret; } - -int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, +int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, void *data, size_t data_len) { - struct spi_slave *spi = flash->spi; - int ret; - - spi_claim_bus(spi); - ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len); - spi_release_bus(spi); - - return ret; + return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len); } -/* - * 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_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 - /* Keep it sorted by best detection */ -#ifdef CONFIG_SPI_FLASH_STMICRO - { 0, 0xff, spi_flash_probe_stmicro, }, -#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) +int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len) { - 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; - } - - 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; + 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); }