mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2024-12-16 03:44:39 +00:00
75 lines
1.6 KiB
Diff
75 lines
1.6 KiB
Diff
From 0b9879757f15d4ac99e032647cb3ee26393031b0 Mon Sep 17 00:00:00 2001
|
|
From: San Mehat <san@android.com>
|
|
Date: Thu, 15 May 2008 09:15:37 -0700
|
|
Subject: [PATCH 097/134] mmc: Add new API call 'sdio_reset_comm' for resetting communication with an SDIO device
|
|
|
|
Signed-off-by: San Mehat <san@android.com>
|
|
---
|
|
drivers/mmc/core/sdio.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
|
|
1 files changed, 58 insertions(+), 0 deletions(-)
|
|
|
|
--- a/drivers/mmc/core/sdio.c
|
|
+++ b/drivers/mmc/core/sdio.c
|
|
@@ -482,3 +482,61 @@ err:
|
|
return err;
|
|
}
|
|
|
|
+int sdio_reset_comm(struct mmc_card *card)
|
|
+{
|
|
+ struct mmc_host *host = card->host;
|
|
+ u32 ocr;
|
|
+ int err;
|
|
+
|
|
+ printk("%s():\n", __func__);
|
|
+ mmc_go_idle(host);
|
|
+
|
|
+ mmc_set_clock(host, host->f_min);
|
|
+
|
|
+ err = mmc_send_io_op_cond(host, 0, &ocr);
|
|
+ if (err)
|
|
+ goto err;
|
|
+
|
|
+ host->ocr = mmc_select_voltage(host, ocr);
|
|
+ if (!host->ocr) {
|
|
+ err = -EINVAL;
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ err = mmc_send_io_op_cond(host, host->ocr, &ocr);
|
|
+ if (err)
|
|
+ goto err;
|
|
+
|
|
+ if (mmc_host_is_spi(host)) {
|
|
+ err = mmc_spi_set_crc(host, use_spi_crc);
|
|
+ if (err)
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ if (!mmc_host_is_spi(host)) {
|
|
+ err = mmc_send_relative_addr(host, &card->rca);
|
|
+ if (err)
|
|
+ goto err;
|
|
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
|
|
+ }
|
|
+ if (!mmc_host_is_spi(host)) {
|
|
+ err = mmc_select_card(card);
|
|
+ if (err)
|
|
+ goto err;
|
|
+ }
|
|
+
|
|
+ mmc_set_clock(host, card->cis.max_dtr);
|
|
+ err = sdio_enable_wide(card);
|
|
+ if (err)
|
|
+ goto err;
|
|
+
|
|
+ return 0;
|
|
+ err:
|
|
+ printk("%s: Error resetting SDIO communications (%d)\n",
|
|
+ mmc_hostname(host), err);
|
|
+ mmc_release_host(host);
|
|
+ return err;
|
|
+}
|
|
+EXPORT_SYMBOL(sdio_reset_comm);
|
|
+
|
|
+
|