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common/cmd_mmc_spi.c
2.07 KB
d52ebf102 mmc: add generic ... |
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/* * Command for mmc_spi setup. * * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> * Licensed under the GPL-2 or later. */ #include <common.h> #include <mmc.h> #include <spi.h> #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 ", bus, cs); return 1; } mmc = mmc_spi_init(bus, cs, speed, mode); if (!mmc) { printf("Failed to create MMC Device "); return 1; } |
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printf("%s: %d at %u:%u hz %u mode %u ", mmc->cfg->name, mmc->block_dev.dev, |
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bus, cs, speed, mode); |
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mmc_init(mmc); |
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return 0; usage: |
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return CMD_RET_USAGE; |
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} U_BOOT_CMD( mmc_spi, 4, 0, do_mmc_spi, "mmc_spi setup", "[bus:]cs [hz] [mode] - setup mmc_spi device" ); |