mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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2d581e6047
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16459 3c298f89-4303-0410-b956-a3cf2f4a3e73
75 lines
1.6 KiB
Diff
75 lines
1.6 KiB
Diff
From 0b9879757f15d4ac99e032647cb3ee26393031b0 Mon Sep 17 00:00:00 2001
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From: San Mehat <san@android.com>
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Date: Thu, 15 May 2008 09:15:37 -0700
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Subject: [PATCH 097/134] mmc: Add new API call 'sdio_reset_comm' for resetting communication with an SDIO device
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Signed-off-by: San Mehat <san@android.com>
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---
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drivers/mmc/core/sdio.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
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1 files changed, 58 insertions(+), 0 deletions(-)
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--- a/drivers/mmc/core/sdio.c
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+++ b/drivers/mmc/core/sdio.c
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@@ -482,3 +482,61 @@ err:
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return err;
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}
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+int sdio_reset_comm(struct mmc_card *card)
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+{
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+ struct mmc_host *host = card->host;
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+ u32 ocr;
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+ int err;
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+
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+ printk("%s():\n", __func__);
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+ mmc_go_idle(host);
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+
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+ mmc_set_clock(host, host->f_min);
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+
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+ err = mmc_send_io_op_cond(host, 0, &ocr);
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+ if (err)
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+ goto err;
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+
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+ host->ocr = mmc_select_voltage(host, ocr);
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+ if (!host->ocr) {
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+ err = -EINVAL;
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+ goto err;
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+ }
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+
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+ err = mmc_send_io_op_cond(host, host->ocr, &ocr);
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+ if (err)
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+ goto err;
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+
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+ if (mmc_host_is_spi(host)) {
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+ err = mmc_spi_set_crc(host, use_spi_crc);
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+ if (err)
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+ goto err;
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+ }
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+
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+ if (!mmc_host_is_spi(host)) {
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+ err = mmc_send_relative_addr(host, &card->rca);
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+ if (err)
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+ goto err;
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+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
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+ }
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+ if (!mmc_host_is_spi(host)) {
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+ err = mmc_select_card(card);
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+ if (err)
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+ goto err;
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+ }
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+
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+ mmc_set_clock(host, card->cis.max_dtr);
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+ err = sdio_enable_wide(card);
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+ if (err)
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+ goto err;
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+
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+ return 0;
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+ err:
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+ printk("%s: Error resetting SDIO communications (%d)\n",
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+ mmc_hostname(host), err);
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+ mmc_release_host(host);
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+ return err;
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+}
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+EXPORT_SYMBOL(sdio_reset_comm);
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+
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+
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