linux-kernel - [PATCH V3 3/5] omap_hsmmc: Add erase capability

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Date:	Thu, 24 Jun 2010 11:44:15 +0300
From:	Adrian Hunter <adrian.hunter@...ia.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Adrian Hunter <adrian.hunter@...ia.com>,
	linux-kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kyungmin Park <kmpark@...radead.org>,
	Madhusudhan Chikkature <madhu.cr@...com>,
	linux-mmc Mailing List <linux-mmc@...r.kernel.org>,
	Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>
Subject: [PATCH V3 3/5] omap_hsmmc: Add erase capability

>From 20b7223c8a3c021a31a7b8079990ec103d89007e Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@...ia.com>
Date: Tue, 18 May 2010 17:33:13 +0300
Subject: [PATCH 3/5] omap_hsmmc: Add erase capability

Disable the data (busy) timeout for erases and set the
MMC_CAP_ERASE capability.

Signed-off-by: Adrian Hunter <adrian.hunter@...ia.com>
---
 drivers/mmc/host/omap_hsmmc.c |   13 ++++++++++---
 1 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index b032828..5cbbe09 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -28,6 +28,7 @@
 #include <linux/clk.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/core.h>
+#include <linux/mmc/mmc.h>
 #include <linux/io.h>
 #include <linux/semaphore.h>
 #include <linux/gpio.h>
@@ -78,6 +79,7 @@
 #define INT_EN_MASK		0x307F0033
 #define BWR_ENABLE		(1 << 4)
 #define BRR_ENABLE		(1 << 5)
+#define DTO_ENABLE		(1 << 20)
 #define INIT_STREAM		(1 << 1)
 #define DP_SELECT		(1 << 21)
 #define DDIR			(1 << 4)
@@ -523,7 +525,8 @@ static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host)
 		dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n");
 }
 
-static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host)
+static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host,
+				  struct mmc_command *cmd)
 {
 	unsigned int irq_mask;
 
@@ -532,6 +535,10 @@ static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host)
 	else
 		irq_mask = INT_EN_MASK;
 
+	/* Disable timeout for erases */
+	if (cmd->opcode == MMC_ERASE)
+		irq_mask &= ~DTO_ENABLE;
+
 	OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
 	OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
 	OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
@@ -782,7 +789,7 @@ omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
 		mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
 	host->cmd = cmd;
 
-	omap_hsmmc_enable_irq(host);
+	omap_hsmmc_enable_irq(host, cmd);
 
 	host->response_busy = 0;
 	if (cmd->flags & MMC_RSP_PRESENT) {
@@ -2094,7 +2101,7 @@ static int __init omap_hsmmc_probe(struct platform_device *pdev)
 	mmc->max_seg_size = mmc->max_req_size;
 
 	mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
-		     MMC_CAP_WAIT_WHILE_BUSY;
+		     MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE;
 
 	if (mmc_slot(host).wires >= 8)
 		mmc->caps |= MMC_CAP_8_BIT_DATA;
-- 
1.6.3.3

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