updates and additions for avr32 arch

1 files changed, 255 insertions, 0 deletions

diff --git a/target/device/Atmel/atngw100-base/kernel-patches/linux-2.6.24-avr32-mmc.patch b/target/device/Atmel/atngw100-base/kernel-patches/linux-2.6.24-avr32-mmc.patch
new file mode 100644
index 000000000..a7654b5c6
--- /dev/null
+++ b/target/device/Atmel/atngw100-base/kernel-patches/linux-2.6.24-avr32-mmc.patch
@@ -0,0 +1,255 @@
+diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
+index eeac479..7913cd8 100644
+--- a/drivers/mmc/host/atmel-mci.c
++++ b/drivers/mmc/host/atmel-mci.c
+@@ -39,7 +39,6 @@ enum {
+ 	EVENT_STOP_COMPLETE,
+ 	EVENT_DMA_COMPLETE,
+ 	EVENT_DMA_ERROR,
+-	EVENT_CARD_DETECT,
+ };
+ 
+ struct atmel_mci_dma {
+@@ -70,6 +69,9 @@ struct atmel_mci {
+ 	int			detect_pin;
+ 	int			wp_pin;
+ 
++	/* For detect pin debouncing */
++	struct timer_list	detect_timer;
++
+ 	unsigned long		bus_hz;
+ 	unsigned long		mapbase;
+ 	struct clk		*mck;
+@@ -108,8 +110,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	test_bit(EVENT_DMA_COMPLETE, &host->completed_events)
+ #define mci_dma_error_is_complete(host)			\
+ 	test_bit(EVENT_DMA_ERROR, &host->completed_events)
+-#define mci_card_detect_is_complete(host)			\
+-	test_bit(EVENT_CARD_DETECT, &host->completed_events)
+ 
+ /* Test and clear bit macros for pending events */
+ #define mci_clear_cmd_is_pending(host)			\
+@@ -124,8 +124,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	test_and_clear_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+ #define mci_clear_dma_error_is_pending(host)		\
+ 	test_and_clear_bit(EVENT_DMA_ERROR, &host->pending_events)
+-#define mci_clear_card_detect_is_pending(host)		\
+-	test_and_clear_bit(EVENT_CARD_DETECT, &host->pending_events)
+ 
+ /* Test and set bit macros for completed events */
+ #define mci_set_cmd_is_completed(host)			\
+@@ -140,8 +138,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	test_and_set_bit(EVENT_STOP_COMPLETE, &host->completed_events)
+ #define mci_set_dma_error_is_completed(host)		\
+ 	test_and_set_bit(EVENT_DMA_ERROR, &host->completed_events)
+-#define mci_set_card_detect_is_completed(host)		\
+-	test_and_set_bit(EVENT_CARD_DETECT, &host->completed_events)
+ 
+ /* Set bit macros for completed events */
+ #define mci_set_cmd_complete(host)			\
+@@ -158,8 +154,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	set_bit(EVENT_DMA_COMPLETE, &host->completed_events)
+ #define mci_set_dma_error_complete(host)		\
+ 	set_bit(EVENT_DMA_ERROR, &host->completed_events)
+-#define mci_set_card_detect_complete(host)		\
+-	set_bit(EVENT_CARD_DETECT, &host->completed_events)
+ 
+ /* Set bit macros for pending events */
+ #define mci_set_cmd_pending(host)			\
+@@ -174,8 +168,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	set_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+ #define mci_set_dma_error_pending(host)			\
+ 	set_bit(EVENT_DMA_ERROR, &host->pending_events)
+-#define mci_set_card_detect_pending(host)		\
+-	set_bit(EVENT_CARD_DETECT, &host->pending_events)
+ 
+ /* Clear bit macros for pending events */
+ #define mci_clear_cmd_pending(host)			\
+@@ -190,8 +182,6 @@ MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+ 	clear_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+ #define mci_clear_dma_error_pending(host)		\
+ 	clear_bit(EVENT_DMA_ERROR, &host->pending_events)
+-#define mci_clear_card_detect_pending(host)		\
+-	clear_bit(EVENT_CARD_DETECT, &host->pending_events)
+ 
+ 
+ #ifdef CONFIG_DEBUG_FS
+@@ -560,6 +550,21 @@ static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+ 				mci_readl(host, IMR));
+ 
+ 	WARN_ON(host->mrq != NULL);
++
++	/*
++	 * We may "know" the card is gone even though there's still an
++	 * electrical connection. If so, we really need to communicate
++	 * this to the MMC core since there won't be any more
++	 * interrupts as the card is completely removed. Otherwise,
++	 * the MMC core might believe the card is still there even
++	 * though the card was just removed very slowly.
++	 */
++	if (!host->present) {
++		mrq->cmd->error = -ENOMEDIUM;
++		mmc_request_done(mmc, mrq);
++		return;
++	}
++
+ 	host->mrq = mrq;
+ 	host->pending_events = 0;
+ 	host->completed_events = 0;
+@@ -729,6 +734,61 @@ static void atmci_command_complete(struct atmel_mci *host,
+ 	}
+ }
+ 
++static void atmci_detect_change(unsigned long data)
++{
++	struct atmel_mci *host = (struct atmel_mci *)data;
++	struct mmc_request *mrq = host->mrq;
++	int present;
++
++	/*
++	 * atmci_remove() sets detect_pin to -1 before freeing the
++	 * interrupt. We must not re-enable the interrupt if it has
++	 * been freed.
++	 */
++	smp_rmb();
++	if (host->detect_pin < 0)
++		return;
++
++	enable_irq(gpio_to_irq(host->detect_pin));
++	present = !gpio_get_value(host->detect_pin);
++
++	dev_vdbg(&host->pdev->dev, "detect change: %d (was %d)\n",
++			present, host->present);
++
++	if (present != host->present) {
++		dev_dbg(&host->mmc->class_dev, "card %s\n",
++			present ? "inserted" : "removed");
++		host->present = present;
++
++		/* Reset controller if card is gone */
++		if (!present) {
++			mci_writel(host, CR, MCI_BIT(SWRST));
++			mci_writel(host, IDR, ~0UL);
++			mci_writel(host, CR, MCI_BIT(MCIEN));
++		}
++
++		/* Clean up queue if present */
++		if (mrq) {
++			if (!mci_cmd_is_complete(host))
++				mrq->cmd->error = -ENOMEDIUM;
++			if (mrq->data && !mci_data_is_complete(host)
++			    && !mci_data_error_is_complete(host)) {
++				dma_stop_request(host->dma.req.req.dmac,
++						host->dma.req.req.channel);
++				host->data->error = -ENOMEDIUM;
++				atmci_data_complete(host, host->data);
++			}
++			if (mrq->stop && !mci_stop_is_complete(host))
++				mrq->stop->error = -ENOMEDIUM;
++
++			host->cmd = NULL;
++			atmci_request_end(host->mmc, mrq);
++		}
++
++		mmc_detect_change(host->mmc, 0);
++	}
++}
++
+ static void atmci_tasklet_func(unsigned long priv)
+ {
+ 	struct mmc_host *mmc = (struct mmc_host *)priv;
+@@ -806,33 +866,6 @@ static void atmci_tasklet_func(unsigned long priv)
+ 		data->bytes_xfered = data->blocks * data->blksz;
+ 		atmci_data_complete(host, data);
+ 	}
+-	if (mci_clear_card_detect_is_pending(host)) {
+-		/* Reset controller if card is gone */
+-		if (!host->present) {
+-			mci_writel(host, CR, MCI_BIT(SWRST));
+-			mci_writel(host, IDR, ~0UL);
+-			mci_writel(host, CR, MCI_BIT(MCIEN));
+-		}
+-
+-		/* Clean up queue if present */
+-		if (mrq) {
+-			if (!mci_cmd_is_complete(host))
+-				mrq->cmd->error = -ETIMEDOUT;
+-			if (mrq->data && !mci_data_is_complete(host)
+-			    && !mci_data_error_is_complete(host)) {
+-				dma_stop_request(host->dma.req.req.dmac,
+-						host->dma.req.req.channel);
+-				host->data->error = -ETIMEDOUT;
+-				atmci_data_complete(host, data);
+-			}
+-			if (mrq->stop && !mci_stop_is_complete(host))
+-				mrq->stop->error = -ETIMEDOUT;
+-
+-			host->cmd = NULL;
+-			atmci_request_end(mmc, mrq);
+-		}
+-		mmc_detect_change(host->mmc, msecs_to_jiffies(100));
+-	}
+ }
+ 
+ static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status)
+@@ -957,20 +990,19 @@ static irqreturn_t atmci_interrupt(int irq, void *dev_id)
+ 	return IRQ_HANDLED;
+ }
+ 
+-static irqreturn_t atmci_detect_change(int irq, void *dev_id)
++static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id)
+ {
+ 	struct mmc_host *mmc = dev_id;
+ 	struct atmel_mci *host = mmc_priv(mmc);
+ 
+-	int present = !gpio_get_value(irq_to_gpio(irq));
++	/*
++	 * Disable interrupts until the pin has stabilized and check
++	 * the state then. Use mod_timer() since we may be in the
++	 * middle of the timer routine when this interrupt triggers.
++	 */
++	disable_irq_nosync(irq);
++	mod_timer(&host->detect_timer, jiffies + msecs_to_jiffies(20));
+ 
+-	if (present != host->present) {
+-		dev_dbg(&mmc->class_dev, "card %s\n",
+-			present ? "inserted" : "removed");
+-		host->present = present;
+-		mci_set_card_detect_pending(host);
+-		tasklet_schedule(&host->tasklet);
+-	}
+ 	return IRQ_HANDLED;
+ }
+ 
+@@ -1079,8 +1111,11 @@ static int __devinit atmci_probe(struct platform_device *pdev)
+ 	mmc_add_host(mmc);
+ 
+ 	if (host->detect_pin >= 0) {
++		setup_timer(&host->detect_timer, atmci_detect_change,
++				(unsigned long)host);
++
+ 		ret = request_irq(gpio_to_irq(host->detect_pin),
+-				  atmci_detect_change,
++				  atmci_detect_interrupt,
+ 				  IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ 				  DRIVER_NAME, mmc);
+ 		if (ret) {
+@@ -1125,9 +1160,16 @@ static int __devexit atmci_remove(struct platform_device *pdev)
+ 		atmci_cleanup_debugfs(host);
+ 
+ 		if (host->detect_pin >= 0) {
+-			free_irq(gpio_to_irq(host->detect_pin), host->mmc);
++			int pin = host->detect_pin;
++
++			/* Make sure our timer doesn't enable the interrupt */
++			host->detect_pin = -1;
++			smp_wmb();
++
++			free_irq(gpio_to_irq(pin), host->mmc);
++			del_timer_sync(&host->detect_timer);
+ 			cancel_delayed_work(&host->mmc->detect);
+-			gpio_free(host->detect_pin);
++			gpio_free(pin);
+ 		}
+ 
+ 		mmc_remove_host(host->mmc);