target/linux/goldfish/patches-2.6.30/0097-mmc-Add-new-API-call-sdio_reset_comm-for-resettin.patch

   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 +