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From: Adrian Hunter <adrian.hunter@nokia.com>
To: Pierre Ossman <pierre@ossman.eu>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>,
	Denis Karpov <ext-denis.2.karpov@nokia.com>,
	Adrian Hunter <adrian.hunter@nokia.com>,
	lkml <linux-kernel@vger.kernel.org>,
	linux-omap Mailing List <linux-omap@vger.kernel.org>
Subject: [PATCH 8/32] mmc: check status after MMC SWITCH command
Date: Fri, 10 Jul 2009 15:41:02 +0300	[thread overview]
Message-ID: <20090710124102.1262.79213.sendpatchset@ahunter-tower> (raw)
In-Reply-To: <20090710124004.1262.10422.sendpatchset@ahunter-tower>

>From cda3074c6233408ec29365c5e63b80567bff8c5c Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@nokia.com>
Date: Wed, 3 Jun 2009 12:22:29 +0300
Subject: [PATCH] mmc: check status after MMC SWITCH command

According to the standard, the SWITCH command should
be followed by a SEND_STATUS command to check for
errors.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
---
 drivers/mmc/core/mmc.c     |   24 ++++++++++++++++++------
 drivers/mmc/core/mmc_ops.c |   23 +++++++++++++++++++++++
 include/linux/mmc/mmc.h    |    1 +
 3 files changed, 42 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 8e2e3d2..f87cc0b 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -416,12 +416,17 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 			EXT_CSD_HS_TIMING, 1);
-		if (err)
+		if (err && err != -EBADMSG)
 			goto free_card;
 
-		mmc_card_set_highspeed(card);
-
-		mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+		if (err) {
+			printk(KERN_WARNING "%s: switch to highspeed failed\n",
+			       mmc_hostname(card->host));
+			err = 0;
+		} else {
+			mmc_card_set_highspeed(card);
+			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+		}
 	}
 
 	/*
@@ -456,10 +461,17 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 				 EXT_CSD_BUS_WIDTH, ext_csd_bit);
 
-		if (err)
+		if (err && err != -EBADMSG)
 			goto free_card;
 
-		mmc_set_bus_width(card->host, bus_width);
+		if (err) {
+			printk(KERN_WARNING "%s: switch to bus width %d "
+			       "failed\n", mmc_hostname(card->host),
+			       1 << bus_width);
+			err = 0;
+		} else {
+			mmc_set_bus_width(card->host, bus_width);
+		}
 	}
 
 	if (!oldcard)
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 355c604..d2cb5c6 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -390,6 +390,7 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
 {
 	int err;
 	struct mmc_command cmd;
+	u32 status;
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
@@ -407,6 +408,28 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
 	if (err)
 		return err;
 
+	/* Must check status to be sure of no errors */
+	do {
+		err = mmc_send_status(card, &status);
+		if (err)
+			return err;
+		if (card->host->caps & MMC_CAP_WAIT_WHILE_BUSY)
+			break;
+		if (mmc_host_is_spi(card->host))
+			break;
+	} while (R1_CURRENT_STATE(status) == 7);
+
+	if (mmc_host_is_spi(card->host)) {
+		if (status & R1_SPI_ILLEGAL_COMMAND)
+			return -EBADMSG;
+	} else {
+		if (status & 0xFDFFA000)
+			printk(KERN_WARNING "%s: unexpected status %#x after "
+			       "switch", mmc_hostname(card->host), status);
+		if (status & R1_SWITCH_ERROR)
+			return -EBADMSG;
+	}
+
 	return 0;
 }
 
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index b2b4095..c02c8db 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -128,6 +128,7 @@
 #define R1_STATUS(x)            (x & 0xFFFFE000)
 #define R1_CURRENT_STATE(x)	((x & 0x00001E00) >> 9)	/* sx, b (4 bits) */
 #define R1_READY_FOR_DATA	(1 << 8)	/* sx, a */
+#define R1_SWITCH_ERROR		(1 << 7)	/* sx, c */
 #define R1_APP_CMD		(1 << 5)	/* sr, c */
 
 /*
-- 
1.5.6.3


  parent reply	other threads:[~2009-07-10 12:40 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-10 12:40 [PATCH 0/32] mmc and omap_hsmmc patches Adrian Hunter
2009-07-10 12:40 ` [PATCH 1/32] mmc: add 'enable' and 'disable' methods to mmc host Adrian Hunter
2009-07-10 17:15   ` Madhusudhan
2009-07-10 19:12     ` Adrian Hunter
2009-07-23 20:37   ` Linus Walleij
2009-07-23 20:37     ` Linus Walleij
2009-07-10 12:40 ` [PATCH 2/32] mmc: allow host claim / release nesting Adrian Hunter
2009-07-10 12:40 ` [PATCH 3/32] mmc: add MMC_CAP_NONREMOVABLE host capability Adrian Hunter
2009-07-10 12:40 ` [PATCH 4/32] mmc: add ability to save power by powering off cards Adrian Hunter
2009-07-10 12:40 ` [PATCH 5/32] mmc: add mmc card sleep and awake support Adrian Hunter
2009-07-10 12:40 ` [PATCH 6/32] mmc: power off once at removal Adrian Hunter
2009-07-10 12:40 ` [PATCH 7/32] mmc: add host capabilities for SD only and MMC only Adrian Hunter
2009-07-25 15:53   ` Matt Fleming
2009-07-25 16:17     ` Adrian Hunter
2009-07-25 18:40       ` Matt Fleming
2009-07-25 19:45         ` Adrian Hunter
2009-07-25 23:51           ` Matt Fleming
2009-07-26  6:14             ` Adrian Hunter
2009-07-10 12:41 ` Adrian Hunter [this message]
2009-07-10 12:41 ` [PATCH 9/32] omap_hsmmc: add debugfs entry (host registers) Adrian Hunter
2009-07-10 12:41 ` [PATCH 10/32] omap_hsmmc: make use of new enable/disable interface Adrian Hunter
2009-07-10 12:41 ` [PATCH 11/32] ARM: OMAP: mmc-twl4030: add context loss counter support Adrian Hunter
2009-07-10 12:41 ` [PATCH 12/32] omap_hsmmc: keep track of power mode Adrian Hunter
2009-07-10 12:41 ` [PATCH 13/32] omap_hsmmc: context save/restore support Adrian Hunter
2009-07-10 12:41 ` [PATCH 14/32] omap_hsmmc: set open drain bit correctly Adrian Hunter
2009-07-10 12:41 ` [PATCH 15/32] omap_hsmmc: ensure workqueues are empty before suspend Adrian Hunter
2009-07-10 12:41 ` [PATCH 16/32] omap_hsmmc: fix scatter-gather list sanity checking Adrian Hunter
2009-07-10 12:42 ` [PATCH 17/32] omap_hsmmc: make use of new MMC_CAP_NONREMOVABLE host capability Adrian Hunter
2009-07-10 12:42 ` [PATCH 18/32] omap_hsmmc: support for deeper power saving states Adrian Hunter
2009-07-10 12:42 ` [PATCH 19/32] ARM: OMAP: mmc-twl4030: add regulator sleep / wake function Adrian Hunter
2009-07-10 12:42 ` [PATCH 20/32] omap_hsmmc: put MMC regulator to sleep Adrian Hunter
2009-07-24 22:51   ` Andrew Morton
2009-07-24 22:51     ` Andrew Morton
2009-07-26  6:34     ` Adrian Hunter
2009-07-10 12:42 ` [PATCH 21/32] omap_hsmmc: add mmc card sleep and awake support Adrian Hunter
2009-07-10 12:42 ` [PATCH 22/32] omap_hsmmc: fix NULL pointer dereference Adrian Hunter
2009-07-10 12:42 ` [PATCH 23/32] omap_hsmmc: cleanup macro usage Adrian Hunter
2009-07-10 12:42 ` [PATCH 24/32] omap_hsmmc: clear interrupt status after init sequence Adrian Hunter
2009-07-10 12:43 ` [PATCH 25/32] omap_hsmmc: cater for weird CMD6 behaviour Adrian Hunter
2009-07-10 12:43 ` [PATCH 26/32] omap_hsmmc: prevent races with irq handler Adrian Hunter
2009-07-24 22:53   ` Andrew Morton
2009-07-24 22:53     ` Andrew Morton
2009-07-27  9:06     ` Adrian Hunter
2009-07-10 12:43 ` [PATCH 27/32] omap_hsmmc: pass host capabilities for SD only and MMC only Adrian Hunter
2009-07-10 12:43 ` [PATCH 28/32] omap_hsmmc: code refactoring Adrian Hunter
2009-07-10 12:43 ` [PATCH 29/32] omap_hsmmc: protect the card when the cover is open Adrian Hunter
2009-07-10 12:43 ` [PATCH 30/32] omap_hsmmc: ensure all clock enables and disables are paired Adrian Hunter
2009-07-10 12:43 ` [PATCH 31/32] omap_hsmmc: set a large data timeout for commands with busy signal Adrian Hunter
2009-07-10 12:43 ` [PATCH 32/32] ARM: OMAP: RX51: set MMC capabilities and power-saving flag Adrian Hunter
2009-07-25 23:53   ` Matt Fleming
2009-07-27  7:58     ` Adrian Hunter
2009-07-27  8:27       ` Matt Fleming
2009-07-27  8:58         ` Adrian Hunter
2009-07-27  9:15           ` Matt Fleming
     [not found]             ` <20090727102111.GI12665@console-pimps.org>
2009-07-27 11:02               ` Adrian Hunter
2009-07-27 18:14                 ` Andrew Morton
2009-07-27 19:32                   ` Matt Fleming
2009-07-26 19:57 ` [PATCH 0/32] mmc and omap_hsmmc patches Matt Fleming

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