X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;ds=sidebyside;f=drivers%2Fmtd%2Fspi%2Fspi_flash.c;h=9991d47a468e0a07f323213de933c793f5257632;hb=348e47f766ac228fb02d1af562b2e9a4c69355db;hp=b61d2198cd1f6b674beab77b905b3b29dd265308;hpb=d1d9065647a25fa8267214ec499fda2441084c7a;p=karo-tx-uboot.git diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index b61d2198cd..9991d47a46 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -8,38 +8,28 @@ */ #include +#include #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); - } +DECLARE_GLOBAL_DATA_PTR; - return ret; +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_read(struct spi_slave *spi, const u8 *cmd, - size_t cmd_len, 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; @@ -49,42 +39,95 @@ int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); if (ret) { - debug("SF: Failed to send read command (%zu bytes): %d\n", + 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, NULL, data, 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", + debug("SF: Failed to transfer %zu bytes of data: %d\n", data_len, ret); } 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) { - unsigned long flags = SPI_XFER_BEGIN; + return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len); +} + +int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, + size_t len, const void *buf) +{ + unsigned long page_addr, byte_addr, page_size; + size_t chunk_len, actual; int ret; + u8 cmd[4]; - if (data_len == 0) - flags |= SPI_XFER_END; + page_size = flash->page_size; + page_addr = offset / page_size; + byte_addr = offset % page_size; - ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags); + ret = spi_claim_bus(flash->spi); 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, data, NULL, SPI_XFER_END); + debug("SF: unable to claim SPI bus\n"); + return ret; + } + + cmd[0] = CMD_PAGE_PROGRAM; + for (actual = 0; actual < len; actual += chunk_len) { + 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); + + 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 = %zu\n", + buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); + + ret = spi_flash_cmd_write_enable(flash); + 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: write failed\n"); + break; + } + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) - debug("SF: Failed to read %zu bytes of data: %d\n", - data_len, ret); + break; + + byte_addr += chunk_len; + if (byte_addr == page_size) { + page_addr++; + byte_addr = 0; + } } + spi_release_bus(flash->spi); return ret; } - int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, void *data, size_t data_len) { @@ -98,6 +141,171 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, return ret; } +int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, + size_t len, void *data) +{ + u8 cmd[5]; + + /* Handle memory-mapped SPI */ + if (flash->memory_map) { + memcpy(data, flash->memory_map + offset, len); + return 0; + } + + cmd[0] = CMD_READ_ARRAY_FAST; + spi_flash_addr(offset, cmd); + cmd[4] = 0x00; + + return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len); +} + +int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout, + u8 cmd, u8 poll_bit) +{ + struct spi_slave *spi = flash->spi; + unsigned long timebase; + int ret; + 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 { + WATCHDOG_RESET(); + + ret = spi_xfer(spi, 8, NULL, &status, 0); + if (ret) + return -1; + + if ((status & poll_bit) == 0) + break; + + } while (get_timer(timebase) < timeout); + + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if ((status & poll_bit) == 0) + return 0; + + /* Timed out */ + debug("SF: time out!\n"); + return -1; +} + +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) +{ + return spi_flash_cmd_poll_bit(flash, timeout, + CMD_READ_STATUS, STATUS_WIP); +} + +int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + u32 end, erase_size; + int ret; + u8 cmd[4]; + + 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; + } + + ret = spi_claim_bus(flash->spi); + if (ret) { + debug("SF: Unable to claim SPI bus\n"); + return ret; + } + + if (erase_size == 4096) + cmd[0] = CMD_ERASE_4K; + else + cmd[0] = CMD_ERASE_64K; + end = offset + len; + + while (offset < end) { + spi_flash_addr(offset, cmd); + offset += erase_size; + + debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1], + cmd[2], cmd[3], offset); + + ret = spi_flash_cmd_write_enable(flash); + if (ret) + goto out; + + ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0); + if (ret) + goto out; + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT); + if (ret) + goto out; + } + + out: + spi_release_bus(flash->spi); + return ret; +} + +int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) +{ + u8 cmd; + int ret; + + ret = spi_flash_cmd_write_enable(flash); + if (ret < 0) { + debug("SF: enabling write failed\n"); + return ret; + } + + cmd = CMD_WRITE_STATUS; + ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1); + if (ret) { + debug("SF: fail to write status register\n"); + return ret; + } + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret < 0) { + debug("SF: write status register timed out\n"); + return ret; + } + + return 0; +} + +#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 * @@ -134,6 +342,9 @@ static const struct { #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 @@ -214,6 +425,19 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, goto err_manufacturer_probe; } +#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"); + spi_release_bus(spi); return flash; @@ -226,6 +450,31 @@ err_claim_bus: 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->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);