| 1 | From 0b9879757f15d4ac99e032647cb3ee26393031b0 Mon Sep 17 00:00:00 2001 |
| 2 | From: San Mehat <san@android.com> |
| 3 | Date: Thu, 15 May 2008 09:15:37 -0700 |
| 4 | Subject: [PATCH 097/134] mmc: Add new API call 'sdio_reset_comm' for resetting communication with an SDIO device |
| 5 | |
| 6 | Signed-off-by: San Mehat <san@android.com> |
| 7 | --- |
| 8 | drivers/mmc/core/sdio.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++ |
| 9 | 1 files changed, 58 insertions(+), 0 deletions(-) |
| 10 | |
| 11 | --- a/drivers/mmc/core/sdio.c |
| 12 | +++ b/drivers/mmc/core/sdio.c |
| 13 | @@ -482,3 +482,61 @@ err: |
| 14 | return err; |
| 15 | } |
| 16 | |
| 17 | +int sdio_reset_comm(struct mmc_card *card) |
| 18 | +{ |
| 19 | + struct mmc_host *host = card->host; |
| 20 | + u32 ocr; |
| 21 | + int err; |
| 22 | + |
| 23 | + printk("%s():\n", __func__); |
| 24 | + mmc_go_idle(host); |
| 25 | + |
| 26 | + mmc_set_clock(host, host->f_min); |
| 27 | + |
| 28 | + err = mmc_send_io_op_cond(host, 0, &ocr); |
| 29 | + if (err) |
| 30 | + goto err; |
| 31 | + |
| 32 | + host->ocr = mmc_select_voltage(host, ocr); |
| 33 | + if (!host->ocr) { |
| 34 | + err = -EINVAL; |
| 35 | + goto err; |
| 36 | + } |
| 37 | + |
| 38 | + err = mmc_send_io_op_cond(host, host->ocr, &ocr); |
| 39 | + if (err) |
| 40 | + goto err; |
| 41 | + |
| 42 | + if (mmc_host_is_spi(host)) { |
| 43 | + err = mmc_spi_set_crc(host, use_spi_crc); |
| 44 | + if (err) |
| 45 | + goto err; |
| 46 | + } |
| 47 | + |
| 48 | + if (!mmc_host_is_spi(host)) { |
| 49 | + err = mmc_send_relative_addr(host, &card->rca); |
| 50 | + if (err) |
| 51 | + goto err; |
| 52 | + mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL); |
| 53 | + } |
| 54 | + if (!mmc_host_is_spi(host)) { |
| 55 | + err = mmc_select_card(card); |
| 56 | + if (err) |
| 57 | + goto err; |
| 58 | + } |
| 59 | + |
| 60 | + mmc_set_clock(host, card->cis.max_dtr); |
| 61 | + err = sdio_enable_wide(card); |
| 62 | + if (err) |
| 63 | + goto err; |
| 64 | + |
| 65 | + return 0; |
| 66 | + err: |
| 67 | + printk("%s: Error resetting SDIO communications (%d)\n", |
| 68 | + mmc_hostname(host), err); |
| 69 | + mmc_release_host(host); |
| 70 | + return err; |
| 71 | +} |
| 72 | +EXPORT_SYMBOL(sdio_reset_comm); |
| 73 | + |
| 74 | + |
| 75 | |
