diff options
Diffstat (limited to 'src/cpu/samsung/exynos5250/alternate_cbfs.c')
-rw-r--r-- | src/cpu/samsung/exynos5250/alternate_cbfs.c | 72 |
1 files changed, 67 insertions, 5 deletions
diff --git a/src/cpu/samsung/exynos5250/alternate_cbfs.c b/src/cpu/samsung/exynos5250/alternate_cbfs.c index 49c9d4c194..59843fb97b 100644 --- a/src/cpu/samsung/exynos5250/alternate_cbfs.c +++ b/src/cpu/samsung/exynos5250/alternate_cbfs.c @@ -24,6 +24,8 @@ #include <string.h> #include <console/console.h> #include "alternate_cbfs.h" +#include "cpu.h" +#include "power.h" #include "spi.h" /* This allows USB A-A firmware upload from a compatible host in four parts: @@ -53,7 +55,7 @@ static int usb_cbfs_open(struct cbfs_media *media) return 0; if (!irom_load_usb()) { - printk(BIOS_ERR, "Unable to load CBFS image via USB!\n"); + printk(BIOS_EMERG, "Unable to load CBFS image via USB!\n"); return -1; } @@ -70,6 +72,45 @@ static int usb_cbfs_open(struct cbfs_media *media) return 0; } +/* + * SDMMC works very similar to USB A-A: we copy the CBFS image into memory + * and read it from there. While SDMMC would also allow direct block by block + * on-demand reading, we might run into problems if we call back into the IROM + * in very late boot stages (e.g. after initializing/changing MMC clocks)... so + * this seems like a safer approach. It also makes it easy to pass our image + * down to payloads. + */ +static int sdmmc_cbfs_open(struct cbfs_media *media) +{ +#ifdef __PRE_RAM__ + /* + * In the bootblock, we just copy the small part that fits in the buffer + * and hope that it's enough (since the romstage is currently always the + * first component in the image, this should work out). In the romstage, + * we copy until our buffer is full (currently 12M) to avoid the pain of + * figuring out the true image size from in here. Since this is mainly a + * developer/debug boot mode, those shortcomings should be bearable. + */ + const u32 count = alternate_cbfs_size / 512; + static int first_run = 1; + int (*irom_load_sdmmc)(u32 start, u32 count, void *dst) = + *irom_sdmmc_read_blocks_ptr; + + if (!first_run) + return 0; + + if (!irom_load_sdmmc(1, count, alternate_cbfs_buffer)) { + printk(BIOS_EMERG, "Unable to load CBFS image from SDMMC!\n"); + return -1; + } + + printk(BIOS_DEBUG, "SDMMC read successful, CBFS image should now be" + " at %p\n", alternate_cbfs_buffer); + first_run = 0; +#endif + return 0; +} + static int alternate_cbfs_close(struct cbfs_media *media) { return 0; } static size_t alternate_cbfs_read(struct cbfs_media *media, void *dest, @@ -90,6 +131,19 @@ static void *alternate_cbfs_map(struct cbfs_media *media, size_t offset, static void *alternate_cbfs_unmap(struct cbfs_media *media, const void *buffer) { return 0; } +static int initialize_exynos_sdmmc_cbfs_media(struct cbfs_media *media) +{ + printk(BIOS_DEBUG, "Using Exynos alternate boot mode SDMMC\n"); + + media->open = sdmmc_cbfs_open; + media->close = alternate_cbfs_close; + media->read = alternate_cbfs_read; + media->map = alternate_cbfs_map; + media->unmap = alternate_cbfs_unmap; + + return 0; +} + static int initialize_exynos_usb_cbfs_media(struct cbfs_media *media) { printk(BIOS_DEBUG, "Using Exynos alternate boot mode USB A-A\n"); @@ -108,8 +162,16 @@ int init_default_cbfs_media(struct cbfs_media *media) if (*iram_secondary_base == SECONDARY_BASE_BOOT_USB) return initialize_exynos_usb_cbfs_media(media); - /* TODO: implement SDMMC (and possibly other) boot mode */ - - return initialize_exynos_spi_cbfs_media(media, - (void*)CONFIG_CBFS_CACHE_ADDRESS, CONFIG_CBFS_CACHE_SIZE); + switch (samsung_get_base_power()->om_stat & OM_STAT_MASK) { + case OM_STAT_SDMMC: + return initialize_exynos_sdmmc_cbfs_media(media); + case OM_STAT_SPI: + return initialize_exynos_spi_cbfs_media(media, + (void*)CONFIG_CBFS_CACHE_ADDRESS, + CONFIG_CBFS_CACHE_SIZE); + default: + printk(BIOS_EMERG, "Exynos OM_STAT value 0x%x not supported!\n", + samsung_get_base_power()->om_stat); + return 0; + } } |