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From a30b981976f90774867ec2a60bac86ebe7244d9a Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Tue, 17 Jul 2012 00:48:27 +0100
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Subject: [PATCH 020/196] Add sync_after_dma module parameter
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---
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drivers/mmc/host/sdhci-bcm2708.c | 60 +++++++++++++++++++++-------------------
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1 file changed, 32 insertions(+), 28 deletions(-)
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diff --git a/drivers/mmc/host/sdhci-bcm2708.c b/drivers/mmc/host/sdhci-bcm2708.c
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index 7bba950..3792b9f 100644
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--- a/drivers/mmc/host/sdhci-bcm2708.c
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+++ b/drivers/mmc/host/sdhci-bcm2708.c
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@@ -51,7 +51,6 @@
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#undef CONFIG_MMC_SDHCI_BCM2708_DMA
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#define CONFIG_MMC_SDHCI_BCM2708_DMA y
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-#define USE_SYNC_AFTER_DMA
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#ifdef CONFIG_MMC_SDHCI_BCM2708_DMA
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/* #define CHECK_DMA_USE */
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#endif
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@@ -131,6 +130,7 @@ static inline unsigned long int since_ns(hptime_t t)
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static bool allow_highspeed = 1;
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static int emmc_clock_freq = BCM2708_EMMC_CLOCK_FREQ;
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+static bool sync_after_dma = 1;
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#if 0
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static void hptime_test(void)
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@@ -822,34 +822,34 @@ static void sdhci_bcm2708_dma_complete_irq(struct sdhci_host *host,
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SDHCI_INT_SPACE_AVAIL);
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}
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} else {
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-#ifdef USE_SYNC_AFTER_DMA
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- /* On the Arasan controller the stop command (which will be
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- scheduled after this completes) does not seem to work
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- properly if we allow it to be issued when we are
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- transferring data to/from the SD card.
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- We get CRC and DEND errors unless we wait for
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- the SD controller to finish reading/writing to the card. */
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- u32 state_mask;
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- int timeout=5000;
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-
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- DBG("PDMA over - sync card\n");
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- if (data->flags & MMC_DATA_READ)
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- state_mask = SDHCI_DOING_READ;
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- else
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- state_mask = SDHCI_DOING_WRITE;
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+ if (sync_after_dma) {
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+ /* On the Arasan controller the stop command (which will be
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+ scheduled after this completes) does not seem to work
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+ properly if we allow it to be issued when we are
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+ transferring data to/from the SD card.
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+ We get CRC and DEND errors unless we wait for
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+ the SD controller to finish reading/writing to the card. */
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+ u32 state_mask;
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+ int timeout=30*5000;
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+
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+ DBG("PDMA over - sync card\n");
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+ if (data->flags & MMC_DATA_READ)
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+ state_mask = SDHCI_DOING_READ;
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+ else
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+ state_mask = SDHCI_DOING_WRITE;
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- while (0 != (sdhci_bcm2708_raw_readl(host, SDHCI_PRESENT_STATE)
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- & state_mask) && --timeout > 0)
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- {
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- udelay(30);
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- continue;
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+ while (0 != (sdhci_bcm2708_raw_readl(host, SDHCI_PRESENT_STATE)
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+ & state_mask) && --timeout > 0)
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+ {
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+ udelay(1);
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+ continue;
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+ }
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+ if (timeout <= 0)
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+ printk(KERN_ERR"%s: final %s to SD card still "
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+ "running\n",
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+ mmc_hostname(host->mmc),
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+ data->flags & MMC_DATA_READ? "read": "write");
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}
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- if (timeout <= 0)
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- printk(KERN_ERR"%s: final %s to SD card still "
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- "running\n",
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- mmc_hostname(host->mmc),
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- data->flags & MMC_DATA_READ? "read": "write");
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-#endif
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if (host_priv->complete) {
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(*host_priv->complete)(host);
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DBG("PDMA %s complete\n",
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@@ -1193,7 +1193,9 @@ static int sdhci_bcm2708_probe(struct platform_device *pdev)
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
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SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
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SDHCI_QUIRK_MISSING_CAPS |
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- SDHCI_QUIRK_NO_HISPD_BIT;
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+ SDHCI_QUIRK_NO_HISPD_BIT |
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+ (sync_after_dma ? 0:SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12);
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+
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#ifdef CONFIG_MMC_SDHCI_BCM2708_DMA
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host->flags = SDHCI_USE_PLATDMA;
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@@ -1363,6 +1365,7 @@ module_exit(sdhci_drv_exit);
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module_param(allow_highspeed, bool, 0444);
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module_param(emmc_clock_freq, int, 0444);
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+module_param(sync_after_dma, bool, 0444);
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MODULE_DESCRIPTION("Secure Digital Host Controller Interface platform driver");
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MODULE_AUTHOR("Broadcom <info@broadcom.com>");
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@@ -1371,5 +1374,6 @@ MODULE_ALIAS("platform:"DRIVER_NAME);
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MODULE_PARM_DESC(allow_highspeed, "Allow high speed transfers modes");
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MODULE_PARM_DESC(emmc_clock_freq, "Specify the speed of emmc clock");
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+MODULE_PARM_DESC(sync_after_dma, "Block in driver until dma complete");
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--
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1.9.1
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