diff options
Diffstat (limited to 'drivers/mtd/spi/spi_flash.c')
| -rw-r--r-- | drivers/mtd/spi/spi_flash.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index b82011d0f..111185af1 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -8,6 +8,7 @@ */ #include <common.h> +#include <fdtdec.h> #include <malloc.h> #include <spi.h> #include <spi_flash.h> @@ -15,6 +16,8 @@ #include "spi_flash_internal.h" +DECLARE_GLOBAL_DATA_PTR; + static void spi_flash_addr(u32 addr, u8 *cmd) { /* cmd[0] is actual command */ @@ -146,6 +149,10 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, { u8 cmd[5]; + /* Handle memory-mapped SPI */ + if (flash->memory_map) + memcpy(data, flash->memory_map + offset, len); + cmd[0] = CMD_READ_ARRAY_FAST; spi_flash_addr(offset, cmd); cmd[4] = 0x00; @@ -275,6 +282,34 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) 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 * @@ -391,9 +426,18 @@ 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, "\n"); + print_size(flash->size, ""); + if (flash->memory_map) + printf(", mapped at %p", flash->memory_map); + puts("\n"); spi_release_bus(spi); |