2 * Command for mmc_spi setup.
4 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
5 * Licensed under the GPL-2 or later.
12 #ifndef CONFIG_MMC_SPI_BUS
13 # define CONFIG_MMC_SPI_BUS 0
15 #ifndef CONFIG_MMC_SPI_CS
16 # define CONFIG_MMC_SPI_CS 1
18 /* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
19 #ifndef CONFIG_MMC_SPI_SPEED
20 # define CONFIG_MMC_SPI_SPEED 25000000
22 /* MMC and SD specs only seem to care that sampling is on the
23 * rising edge ... meaning SPI modes 0 or 3. So either SPI mode
24 * should be legit. We'll use mode 0 since the steady state is 0,
25 * which is appropriate for hotplugging, unless the platform data
26 * specify mode 3 (if hardware is not compatible to mode 0).
28 #ifndef CONFIG_MMC_SPI_MODE
29 # define CONFIG_MMC_SPI_MODE SPI_MODE_0
32 static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
34 uint bus = CONFIG_MMC_SPI_BUS;
35 uint cs = CONFIG_MMC_SPI_CS;
36 uint speed = CONFIG_MMC_SPI_SPEED;
37 uint mode = CONFIG_MMC_SPI_MODE;
44 cs = simple_strtoul(argv[1], &endp, 0);
45 if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
51 cs = simple_strtoul(endp + 1, &endp, 0);
56 speed = simple_strtoul(argv[2], &endp, 0);
57 if (*argv[2] == 0 || *endp != 0)
61 mode = simple_strtoul(argv[3], &endp, 16);
62 if (*argv[3] == 0 || *endp != 0)
65 if (!spi_cs_is_valid(bus, cs)) {
66 printf("Invalid SPI bus %u cs %u\n", bus, cs);
70 mmc = mmc_spi_init(bus, cs, speed, mode);
72 printf("Failed to create MMC Device\n");
75 printf("%s: %d at %u:%u hz %u mode %u\n", mmc->cfg->name, mmc->block_dev.dev,
76 bus, cs, speed, mode);
85 mmc_spi, 4, 0, do_mmc_spi,
87 "[bus:]cs [hz] [mode] - setup mmc_spi device"