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https://github.com/brain-hackers/u-boot-brain
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4c12eeb8b5
Change all files in common/ to use CMD_RET_USAGE instead of calling cmd_usage() directly. I'm not completely sure about this patch since the code since impact is small (100 byte or so on ARM) and it might need splitting into smaller patches. But for now here it is. Signed-off-by: Simon Glass <sjg@chromium.org>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* Command for mmc_spi setup.
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*
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* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <mmc.h>
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#include <spi.h>
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#ifndef CONFIG_MMC_SPI_BUS
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# define CONFIG_MMC_SPI_BUS 0
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#endif
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#ifndef CONFIG_MMC_SPI_CS
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# define CONFIG_MMC_SPI_CS 1
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#endif
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/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
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#ifndef CONFIG_MMC_SPI_SPEED
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# define CONFIG_MMC_SPI_SPEED 25000000
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#endif
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/* MMC and SD specs only seem to care that sampling is on the
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* rising edge ... meaning SPI modes 0 or 3. So either SPI mode
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* should be legit. We'll use mode 0 since the steady state is 0,
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* which is appropriate for hotplugging, unless the platform data
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* specify mode 3 (if hardware is not compatible to mode 0).
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*/
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#ifndef CONFIG_MMC_SPI_MODE
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# define CONFIG_MMC_SPI_MODE SPI_MODE_0
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#endif
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static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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uint bus = CONFIG_MMC_SPI_BUS;
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uint cs = CONFIG_MMC_SPI_CS;
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uint speed = CONFIG_MMC_SPI_SPEED;
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uint mode = CONFIG_MMC_SPI_MODE;
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char *endp;
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struct mmc *mmc;
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if (argc < 2)
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goto usage;
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cs = simple_strtoul(argv[1], &endp, 0);
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if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
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goto usage;
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if (*endp == ':') {
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if (endp[1] == 0)
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goto usage;
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bus = cs;
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cs = simple_strtoul(endp + 1, &endp, 0);
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if (*endp != 0)
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goto usage;
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}
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if (argc >= 3) {
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speed = simple_strtoul(argv[2], &endp, 0);
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if (*argv[2] == 0 || *endp != 0)
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goto usage;
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}
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if (argc >= 4) {
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mode = simple_strtoul(argv[3], &endp, 16);
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if (*argv[3] == 0 || *endp != 0)
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goto usage;
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}
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if (!spi_cs_is_valid(bus, cs)) {
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printf("Invalid SPI bus %u cs %u\n", bus, cs);
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return 1;
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}
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mmc = mmc_spi_init(bus, cs, speed, mode);
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if (!mmc) {
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printf("Failed to create MMC Device\n");
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return 1;
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}
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printf("%s: %d at %u:%u hz %u mode %u\n", mmc->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;
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usage:
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return CMD_RET_USAGE;
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}
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U_BOOT_CMD(
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mmc_spi, 4, 0, do_mmc_spi,
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"mmc_spi setup",
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"[bus:]cs [hz] [mode] - setup mmc_spi device"
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);
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