diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-21 20:23:20 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-09-23 19:40:07 +0200 |
| commit | 5c4e6f1301649d5b29dd0f70e6da83e728ab5ca5 (patch) | |
| tree | 97d612d990f3b5255b6ea59150f91622699e124f /drivers/mmc/core/sdio_ops.c | |
| parent | 1d4de9edd6c9ad676b20729ab15c04b78e9a50c5 (diff) | |
mmc: detect SDIO cards
Really basic init sequence for SDIO cards.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/core/sdio_ops.c')
| -rw-r--r-- | drivers/mmc/core/sdio_ops.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c new file mode 100644 index 000000000000..d6f9f9d85178 --- /dev/null +++ b/drivers/mmc/core/sdio_ops.c @@ -0,0 +1,49 @@ +/* + * linux/drivers/mmc/sdio_ops.c + * + * Copyright 2006-2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + */ + +#include <linux/mmc/host.h> +#include <linux/mmc/mmc.h> +#include <linux/mmc/sdio.h> + +#include "core.h" + +int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) +{ + struct mmc_command cmd; + int i, err = 0; + + BUG_ON(!host); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_SEND_OP_COND; + cmd.arg = ocr; + cmd.flags = MMC_RSP_R4 | MMC_CMD_BCR; + + for (i = 100; i; i--) { + err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); + if (err) + break; + + if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0) + break; + + err = -ETIMEDOUT; + + mmc_delay(10); + } + + if (rocr) + *rocr = cmd.resp[0]; + + return err; +} + |