diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mmc/core/core.c | 2 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_ops.c | 119 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_ops.h | 1 |
3 files changed, 74 insertions, 48 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index d84c880fac84..50b208253440 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -890,6 +890,8 @@ void mmc_rescan(struct work_struct *work) mmc_claim_host(host); mmc_power_up(host); + sdio_go_idle(host); + mmc_go_idle(host); mmc_send_if_cond(host, host->ocr_avail); diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c index 4eb7825fd1a7..208beeb23ed6 100644 --- a/drivers/mmc/core/sdio_ops.c +++ b/drivers/mmc/core/sdio_ops.c @@ -67,54 +67,6 @@ int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) return err; } -int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, - unsigned addr, u8 in, u8* out) -{ - struct mmc_command cmd; - int err; - - BUG_ON(!card); - BUG_ON(fn > 7); - - /* sanity check */ - if (addr & ~0x1FFFF) - return -EINVAL; - - memset(&cmd, 0, sizeof(struct mmc_command)); - - cmd.opcode = SD_IO_RW_DIRECT; - cmd.arg = write ? 0x80000000 : 0x00000000; - cmd.arg |= fn << 28; - cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; - cmd.arg |= addr << 9; - cmd.arg |= in; - cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; - - err = mmc_wait_for_cmd(card->host, &cmd, 0); - if (err) - return err; - - if (mmc_host_is_spi(card->host)) { - /* host driver already reported errors */ - } else { - if (cmd.resp[0] & R5_ERROR) - return -EIO; - if (cmd.resp[0] & R5_FUNCTION_NUMBER) - return -EINVAL; - if (cmd.resp[0] & R5_OUT_OF_RANGE) - return -ERANGE; - } - - if (out) { - if (mmc_host_is_spi(card->host)) - *out = (cmd.resp[0] >> 8) & 0xFF; - else - *out = cmd.resp[0] & 0xFF; - } - - return 0; -} - int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz) { @@ -182,3 +134,74 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, return 0; } +static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn, + unsigned addr, u8 in, u8 *out) +{ + struct mmc_command cmd; + int err; + + BUG_ON(!host); + BUG_ON(fn > 7); + + /* sanity check */ + if (addr & ~0x1FFFF) + return -EINVAL; + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_RW_DIRECT; + cmd.arg = write ? 0x80000000 : 0x00000000; + cmd.arg |= fn << 28; + cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; + cmd.arg |= addr << 9; + cmd.arg |= in; + cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(host, &cmd, 0); + if (err) + return err; + + if (mmc_host_is_spi(host)) { + /* host driver already reported errors */ + } else { + if (cmd.resp[0] & R5_ERROR) + return -EIO; + if (cmd.resp[0] & R5_FUNCTION_NUMBER) + return -EINVAL; + if (cmd.resp[0] & R5_OUT_OF_RANGE) + return -ERANGE; + } + + if (out) { + if (mmc_host_is_spi(host)) + *out = (cmd.resp[0] >> 8) & 0xFF; + else + *out = cmd.resp[0] & 0xFF; + } + + return 0; +} + +int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8 *out) +{ + BUG_ON(!card); + return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out); +} + +int sdio_go_idle(struct mmc_host *host) +{ + int ret; + u8 abort; + + /* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */ + + ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort); + if (ret) + abort = 0x08; + else + abort |= 0x08; + + ret = mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL); + return ret; +} diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h index e2e74b0d17d8..9b546c71eb5e 100644 --- a/drivers/mmc/core/sdio_ops.h +++ b/drivers/mmc/core/sdio_ops.h @@ -17,6 +17,7 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, unsigned addr, u8 in, u8* out); int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz); +int sdio_go_idle(struct mmc_host *host); #endif |