From: Pierre Ossman <drzeus-list@drzeus.cx>
To: linux-kernel@vger.kernel.org, Russell King <rmk+lkml@arm.linux.org.uk>
Subject: [PATCH 1/3] MMC compatibility fix - GO_IDLE
Date: Sat, 18 Sep 2004 11:56:42 +0200 [thread overview]
Message-ID: <414C065A.7000602@drzeus.cx> (raw)
[-- Attachment #1: Type: text/plain, Size: 92 bytes --]
This patch adds a GO_IDLE before sending a new SEND_OP_COND (as required
by MMC standard).
[-- Attachment #2: mmc-goidle.patch --]
[-- Type: text/x-patch, Size: 735 bytes --]
Index: linux-wbsd/drivers/mmc/mmc.c
===================================================================
--- linux-wbsd/drivers/mmc/mmc.c (revision 57)
+++ linux-wbsd/drivers/mmc/mmc.c (revision 58)
@@ -579,6 +579,8 @@
static void mmc_setup(struct mmc_host *host)
{
+ struct mmc_command cmd;
+
if (host->ios.power_mode != MMC_POWER_ON) {
int err;
u32 ocr;
@@ -613,6 +615,16 @@
if (host->ocr == 0)
return;
+ /* Put cards in idle before sending new OCR */
+
+ cmd.opcode = MMC_GO_IDLE_STATE;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_NONE;
+
+ mmc_wait_for_cmd(host, &cmd, 0);
+
+ mmc_delay(1);
+
/*
* Send the selected OCR multiple times... until the cards
* all get the idea that they should be ready for CMD2.
next reply other threads:[~2004-09-18 9:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-18 9:56 Pierre Ossman [this message]
2004-09-22 14:17 ` [PATCH 1/3] MMC compatibility fix - GO_IDLE Russell King
2004-09-22 17:45 ` Pierre Ossman
2004-09-22 19:15 ` Russell King
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