From d52ebf102209cc1ad460c79b9498b2c8936ba413 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Fri, 24 Dec 2010 13:12:21 +0000 Subject: mmc: add generic mmc spi driver This patch supports mmc/sd card with spi interface. It is based on the generic mmc framework. It works with SDHC and supports multi blocks read/write. The crc checksum on data packet is enabled with the def, There is a subcomamnd "mmc_spi" to setup spi bus and cs at run time. Signed-off-by: Thomas Chou Signed-off-by: Andy Fleming --- common/Makefile | 1 + common/cmd_mmc_spi.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 89 insertions(+) create mode 100644 common/cmd_mmc_spi.c (limited to 'common') diff --git a/common/Makefile b/common/Makefile index 4555716108..6f41ce4397 100644 --- a/common/Makefile +++ b/common/Makefile @@ -118,6 +118,7 @@ COBJS-$(CONFIG_CMD_MII) += miiphyutil.o COBJS-$(CONFIG_CMD_MII) += cmd_mii.o COBJS-$(CONFIG_CMD_MISC) += cmd_misc.o COBJS-$(CONFIG_CMD_MMC) += cmd_mmc.o +COBJS-$(CONFIG_CMD_MMC_SPI) += cmd_mmc_spi.o COBJS-$(CONFIG_MP) += cmd_mp.o COBJS-$(CONFIG_CMD_MTDPARTS) += cmd_mtdparts.o COBJS-$(CONFIG_CMD_NAND) += cmd_nand.o diff --git a/common/cmd_mmc_spi.c b/common/cmd_mmc_spi.c new file mode 100644 index 0000000000..63fe313377 --- /dev/null +++ b/common/cmd_mmc_spi.c @@ -0,0 +1,88 @@ +/* + * Command for mmc_spi setup. + * + * Copyright (C) 2010 Thomas Chou + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include + +#ifndef CONFIG_MMC_SPI_BUS +# define CONFIG_MMC_SPI_BUS 0 +#endif +#ifndef CONFIG_MMC_SPI_CS +# define CONFIG_MMC_SPI_CS 1 +#endif +/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */ +#ifndef CONFIG_MMC_SPI_SPEED +# define CONFIG_MMC_SPI_SPEED 25000000 +#endif +/* MMC and SD specs only seem to care that sampling is on the + * rising edge ... meaning SPI modes 0 or 3. So either SPI mode + * should be legit. We'll use mode 0 since the steady state is 0, + * which is appropriate for hotplugging, unless the platform data + * specify mode 3 (if hardware is not compatible to mode 0). + */ +#ifndef CONFIG_MMC_SPI_MODE +# define CONFIG_MMC_SPI_MODE SPI_MODE_0 +#endif + +static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + uint bus = CONFIG_MMC_SPI_BUS; + uint cs = CONFIG_MMC_SPI_CS; + uint speed = CONFIG_MMC_SPI_SPEED; + uint mode = CONFIG_MMC_SPI_MODE; + char *endp; + struct mmc *mmc; + + if (argc < 2) + goto usage; + + cs = simple_strtoul(argv[1], &endp, 0); + if (*argv[1] == 0 || (*endp != 0 && *endp != ':')) + goto usage; + if (*endp == ':') { + if (endp[1] == 0) + goto usage; + bus = cs; + cs = simple_strtoul(endp + 1, &endp, 0); + if (*endp != 0) + goto usage; + } + if (argc >= 3) { + speed = simple_strtoul(argv[2], &endp, 0); + if (*argv[2] == 0 || *endp != 0) + goto usage; + } + if (argc >= 4) { + mode = simple_strtoul(argv[3], &endp, 16); + if (*argv[3] == 0 || *endp != 0) + goto usage; + } + if (!spi_cs_is_valid(bus, cs)) { + printf("Invalid SPI bus %u cs %u\n", bus, cs); + return 1; + } + + mmc = mmc_spi_init(bus, cs, speed, mode); + if (!mmc) { + printf("Failed to create MMC Device\n"); + return 1; + } + printf("%s: %d at %u:%u hz %u mode %u\n", mmc->name, mmc->block_dev.dev, + bus, cs, speed, mode); + return 0; + +usage: + cmd_usage(cmdtp); + return 1; +} + +U_BOOT_CMD( + mmc_spi, 4, 0, do_mmc_spi, + "mmc_spi setup", + "[bus:]cs [hz] [mode] - setup mmc_spi device" +); -- cgit v1.2.1 From 940e078297fc5f8707fe11003c9fda4a275fad5b Mon Sep 17 00:00:00 2001 From: Minkyu Kang Date: Tue, 4 Jan 2011 01:04:19 +0000 Subject: mmc: show mmc capacity using print_size Signed-off-by: Minkyu Kang Signed-off-by: Andy Fleming --- common/cmd_mmc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'common') diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c index 4323f76b30..6166749ad5 100644 --- a/common/cmd_mmc.c +++ b/common/cmd_mmc.c @@ -104,7 +104,8 @@ static void print_mmcinfo(struct mmc *mmc) (mmc->version >> 4) & 0xf, mmc->version & 0xf); printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No"); - printf("Capacity: %lld\n", mmc->capacity); + puts("Capacity: "); + print_size(mmc->capacity, "\n"); printf("Bus Width: %d-bit\n", mmc->bus_width); } -- cgit v1.2.1