public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
* [PATCH 07/18] MMC: OMAP: New release dma and abort xfer functions
@ 2008-01-28 19:07 Carlos Aguiar
  0 siblings, 0 replies; 3+ messages in thread
From: Carlos Aguiar @ 2008-01-28 19:07 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Juha Yrjola <juha.yrjola@solidboot.com>

New functions to support MMC multislot:
mmc_omap_release_dma() and mmc_omap_abort_xfer().

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/mmc/host/omap.c |   79 +++++++++++++++++++++++++++++++++++-----------
 1 files changed, 60 insertions(+), 19 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index c6dac7e..4f98bef 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -342,26 +342,32 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 }
 
 static void
+mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
+		     int abort)
+{
+	enum dma_data_direction dma_data_dir;
+
+	BUG_ON(host->dma_ch < 0);
+	if (data->error)
+		omap_stop_dma(host->dma_ch);
+	/* Release DMA channel lazily */
+	mod_timer(&host->dma_timer, jiffies + HZ);
+	if (data->flags & MMC_DATA_WRITE)
+		dma_data_dir = DMA_TO_DEVICE;
+	else
+		dma_data_dir = DMA_FROM_DEVICE;
+	dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+		     dma_data_dir);
+}
+
+static void
 mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 {
-	if (host->dma_in_use) {
-		enum dma_data_direction dma_data_dir;
-
-		BUG_ON(host->dma_ch < 0);
-		if (data->error)
-			omap_stop_dma(host->dma_ch);
-		/* Release DMA channel lazily */
-		mod_timer(&host->dma_timer, jiffies + HZ);
-		if (data->flags & MMC_DATA_WRITE)
-			dma_data_dir = DMA_TO_DEVICE;
-		else
-			dma_data_dir = DMA_FROM_DEVICE;
-		dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
-			     dma_data_dir);
-	}
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, data->error);
+
 	host->data = NULL;
 	host->sg_len = 0;
-	clk_disable(host->fclk);
 
 	/* NOTE:  MMC layer will sometimes poll-wait CMD13 next, issuing
 	 * dozens of requests until the card finishes writing data.
@@ -369,8 +375,12 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 	 */
 
 	if (!data->stop) {
+		struct mmc_host *mmc;
+
 		host->mrq = NULL;
-		mmc_request_done(host->mmc, data->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, data->mrq);
 		return;
 	}
 
@@ -378,6 +388,32 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 }
 
 static void
+mmc_omap_abort_xfer(struct mmc_omap_host *host, struct mmc_data *data)
+{
+	int loops;
+	u16 ie;
+
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, 1);
+
+	host->data = NULL;
+	host->sg_len = 0;
+
+	ie = OMAP_MMC_READ(host, IE);
+	OMAP_MMC_WRITE(host, IE, 0);
+	OMAP_MMC_WRITE(host, CMD, 1 << 7);
+	loops = 0;
+	while (!(OMAP_MMC_READ(host, STAT) & OMAP_MMC_STAT_END_OF_CMD)) {
+		udelay(1);
+		loops++;
+		if (loops == 100000)
+			break;
+	}
+	OMAP_MMC_WRITE(host, STAT, OMAP_MMC_STAT_END_OF_CMD);
+	OMAP_MMC_WRITE(host, IE, ie);
+}
+
+static void
 mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
 {
 	unsigned long flags;
@@ -454,9 +490,14 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 	}
 
 	if (host->data == NULL || cmd->error) {
+		struct mmc_host *mmc;
+
+		if (host->data != NULL)
+			mmc_omap_abort_xfer(host, host->data);
 		host->mrq = NULL;
-		clk_disable(host->fclk);
-		mmc_request_done(host->mmc, cmd->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, cmd->mrq);
 	}
 }
 
-- 1.5.3.GIT


^ permalink raw reply related	[flat|nested] 3+ messages in thread
* [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree
@ 2008-03-14 19:35 Carlos Aguiar
  2008-03-24 12:26 ` Pierre Ossman
  0 siblings, 1 reply; 3+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:35 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

Hi Pierre, Tony and folks,

The new version of the patch series that follows is a synchronization
of MMC OMAP driver from Linux-OMAP tree into mainline tree.

Improvements and corrections are based on comments from Pierre Ossman and 
Roel Kluin, from LKML.

Just to remind you, basically it brings MMC multislot support for OMAP boards 
with one slot (like H2 1611, H3 1710) or two slots (like H4 2420 and N800).
Others boards supported by such feature are: N770, Siemens SX1 and Apollon.

BR,

Carlos.

-- 
Carlos Eduardo Aguiar
Nokia Institute of Technology - INdT
Open Source Mobile Research Center - OSMRC - Manaus
Core Team
Phone: +55 92 2126-1079
Mobile: +55 92 8127-1797
E-mail: carlos.aguiar@indt.org.br


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [PATCH 07/18] MMC: OMAP: New release dma and abort xfer functions
@ 2008-03-14 19:36 Carlos Aguiar
  0 siblings, 0 replies; 3+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:36 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Juha Yrjola <juha.yrjola@solidboot.com>

New functions to support MMC multislot:
mmc_omap_release_dma() and mmc_omap_abort_xfer().

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/mmc/host/omap.c |   79 +++++++++++++++++++++++++++++++++++-----------
 1 files changed, 60 insertions(+), 19 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 5175c18..704e842 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -327,26 +327,32 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 }
 
 static void
+mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
+		     int abort)
+{
+	enum dma_data_direction dma_data_dir;
+
+	BUG_ON(host->dma_ch < 0);
+	if (data->error)
+		omap_stop_dma(host->dma_ch);
+	/* Release DMA channel lazily */
+	mod_timer(&host->dma_timer, jiffies + HZ);
+	if (data->flags & MMC_DATA_WRITE)
+		dma_data_dir = DMA_TO_DEVICE;
+	else
+		dma_data_dir = DMA_FROM_DEVICE;
+	dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+		     dma_data_dir);
+}
+
+static void
 mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 {
-	if (host->dma_in_use) {
-		enum dma_data_direction dma_data_dir;
-
-		BUG_ON(host->dma_ch < 0);
-		if (data->error)
-			omap_stop_dma(host->dma_ch);
-		/* Release DMA channel lazily */
-		mod_timer(&host->dma_timer, jiffies + HZ);
-		if (data->flags & MMC_DATA_WRITE)
-			dma_data_dir = DMA_TO_DEVICE;
-		else
-			dma_data_dir = DMA_FROM_DEVICE;
-		dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
-			     dma_data_dir);
-	}
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, data->error);
+
 	host->data = NULL;
 	host->sg_len = 0;
-	clk_disable(host->fclk);
 
 	/* NOTE:  MMC layer will sometimes poll-wait CMD13 next, issuing
 	 * dozens of requests until the card finishes writing data.
@@ -354,8 +360,12 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 	 */
 
 	if (!data->stop) {
+		struct mmc_host *mmc;
+
 		host->mrq = NULL;
-		mmc_request_done(host->mmc, data->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, data->mrq);
 		return;
 	}
 
@@ -363,6 +373,32 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 }
 
 static void
+mmc_omap_abort_xfer(struct mmc_omap_host *host, struct mmc_data *data)
+{
+	int loops;
+	u16 ie;
+
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, 1);
+
+	host->data = NULL;
+	host->sg_len = 0;
+
+	ie = OMAP_MMC_READ(host, IE);
+	OMAP_MMC_WRITE(host, IE, 0);
+	OMAP_MMC_WRITE(host, CMD, 1 << 7);
+	loops = 0;
+	while (!(OMAP_MMC_READ(host, STAT) & OMAP_MMC_STAT_END_OF_CMD)) {
+		udelay(1);
+		loops++;
+		if (loops == 100000)
+			break;
+	}
+	OMAP_MMC_WRITE(host, STAT, OMAP_MMC_STAT_END_OF_CMD);
+	OMAP_MMC_WRITE(host, IE, ie);
+}
+
+static void
 mmc_omap_end_of_data(struct mmc_omap_host *host, struct mmc_data *data)
 {
 	unsigned long flags;
@@ -439,9 +475,14 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 	}
 
 	if (host->data == NULL || cmd->error) {
+		struct mmc_host *mmc;
+
+		if (host->data != NULL)
+			mmc_omap_abort_xfer(host, host->data);
 		host->mrq = NULL;
-		clk_disable(host->fclk);
-		mmc_request_done(host->mmc, cmd->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, cmd->mrq);
 	}
 }
 
-- 1.5.3.GIT


^ permalink raw reply related	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-03-26 20:15 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-01-28 19:07 [PATCH 07/18] MMC: OMAP: New release dma and abort xfer functions Carlos Aguiar
  -- strict thread matches above, loose matches on Subject: below --
2008-03-14 19:35 [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree Carlos Aguiar
2008-03-24 12:26 ` Pierre Ossman
2008-03-26 20:09   ` [PATCH 07/18] MMC: OMAP: New release dma and abort xfer functions Carlos Aguiar
2008-03-14 19:36 Carlos Aguiar

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox