1 files changed, 28 insertions, 20 deletions

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 02d8f524bb9e..7bc950520fd9 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -4,6 +4,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/dma-mapping.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -104,6 +105,7 @@
 
 struct sdhci_tegra_soc_data {
         const struct sdhci_pltfm_data *pdata;
+        u64 dma_mask;
         u32 nvquirks;
         u8 min_tap_delay;
         u8 max_tap_delay;
@@ -1233,11 +1235,25 @@ static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = {
         .update_dcmd_desc = sdhci_tegra_update_dcmd_desc,
 };
 
+static int tegra_sdhci_set_dma_mask(struct sdhci_host *host)
+{
+        struct sdhci_pltfm_host *platform = sdhci_priv(host);
+        struct sdhci_tegra *tegra = sdhci_pltfm_priv(platform);
+        const struct sdhci_tegra_soc_data *soc = tegra->soc_data;
+        struct device *dev = mmc_dev(host->mmc);
+
+        if (soc->dma_mask)
+                return dma_set_mask_and_coherent(dev, soc->dma_mask);
+
+        return 0;
+}
+
 static const struct sdhci_ops tegra_sdhci_ops = {
         .get_ro     = tegra_sdhci_get_ro,
         .read_w     = tegra_sdhci_readw,
         .write_l    = tegra_sdhci_writel,
         .set_clock  = tegra_sdhci_set_clock,
+        .set_dma_mask = tegra_sdhci_set_dma_mask,
         .set_bus_width = sdhci_set_bus_width,
         .reset      = tegra_sdhci_reset,
         .platform_execute_tuning = tegra_sdhci_execute_tuning,
@@ -1257,6 +1273,7 @@ static const struct sdhci_pltfm_data sdhci_tegra20_pdata = {
 
 static const struct sdhci_tegra_soc_data soc_data_tegra20 = {
         .pdata = &sdhci_tegra20_pdata,
+        .dma_mask = DMA_BIT_MASK(32),
         .nvquirks = NVQUIRK_FORCE_SDHCI_SPEC_200 |
                     NVQUIRK_ENABLE_BLOCK_GAP_DET,
 };
@@ -1283,6 +1300,7 @@ static const struct sdhci_pltfm_data sdhci_tegra30_pdata = {
 
 static const struct sdhci_tegra_soc_data soc_data_tegra30 = {
         .pdata = &sdhci_tegra30_pdata,
+        .dma_mask = DMA_BIT_MASK(32),
         .nvquirks = NVQUIRK_ENABLE_SDHCI_SPEC_300 |
                     NVQUIRK_ENABLE_SDR50 |
                     NVQUIRK_ENABLE_SDR104 |
@@ -1295,6 +1313,7 @@ static const struct sdhci_ops tegra114_sdhci_ops = {
         .write_w    = tegra_sdhci_writew,
         .write_l    = tegra_sdhci_writel,
         .set_clock  = tegra_sdhci_set_clock,
+        .set_dma_mask = tegra_sdhci_set_dma_mask,
         .set_bus_width = sdhci_set_bus_width,
         .reset      = tegra_sdhci_reset,
         .platform_execute_tuning = tegra_sdhci_execute_tuning,
@@ -1316,6 +1335,7 @@ static const struct sdhci_pltfm_data sdhci_tegra114_pdata = {
 
 static const struct sdhci_tegra_soc_data soc_data_tegra114 = {
         .pdata = &sdhci_tegra114_pdata,
+        .dma_mask = DMA_BIT_MASK(32),
 };
 
 static const struct sdhci_pltfm_data sdhci_tegra124_pdata = {
@@ -1325,22 +1345,13 @@ static const struct sdhci_pltfm_data sdhci_tegra124_pdata = {
                   SDHCI_QUIRK_NO_HISPD_BIT |
                   SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
                   SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
-        .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-                   /*
-                    * The TRM states that the SD/MMC controller found on
-                    * Tegra124 can address 34 bits (the maximum supported by
-                    * the Tegra memory controller), but tests show that DMA
-                    * to or from above 4 GiB doesn't work. This is possibly
-                    * caused by missing programming, though it's not obvious
-                    * what sequence is required. Mark 64-bit DMA broken for
-                    * now to fix this for existing users (e.g. Nyan boards).
-                    */
-                   SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+        .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
         .ops  = &tegra114_sdhci_ops,
 };
 
 static const struct sdhci_tegra_soc_data soc_data_tegra124 = {
         .pdata = &sdhci_tegra124_pdata,
+        .dma_mask = DMA_BIT_MASK(34),
 };
 
 static const struct sdhci_ops tegra210_sdhci_ops = {
@@ -1349,6 +1360,7 @@ static const struct sdhci_ops tegra210_sdhci_ops = {
         .write_w    = tegra210_sdhci_writew,
         .write_l    = tegra_sdhci_writel,
         .set_clock  = tegra_sdhci_set_clock,
+        .set_dma_mask = tegra_sdhci_set_dma_mask,
         .set_bus_width = sdhci_set_bus_width,
         .reset      = tegra_sdhci_reset,
         .set_uhs_signaling = tegra_sdhci_set_uhs_signaling,
@@ -1369,6 +1381,7 @@ static const struct sdhci_pltfm_data sdhci_tegra210_pdata = {
 
 static const struct sdhci_tegra_soc_data soc_data_tegra210 = {
         .pdata = &sdhci_tegra210_pdata,
+        .dma_mask = DMA_BIT_MASK(34),
         .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL |
                     NVQUIRK_HAS_PADCALIB |
                     NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |
@@ -1383,6 +1396,7 @@ static const struct sdhci_ops tegra186_sdhci_ops = {
         .read_w     = tegra_sdhci_readw,
         .write_l    = tegra_sdhci_writel,
         .set_clock  = tegra_sdhci_set_clock,
+        .set_dma_mask = tegra_sdhci_set_dma_mask,
         .set_bus_width = sdhci_set_bus_width,
         .reset      = tegra_sdhci_reset,
         .set_uhs_signaling = tegra_sdhci_set_uhs_signaling,
@@ -1398,20 +1412,13 @@ static const struct sdhci_pltfm_data sdhci_tegra186_pdata = {
                   SDHCI_QUIRK_NO_HISPD_BIT |
                   SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
                   SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
-        .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
-                   /* SDHCI controllers on Tegra186 support 40-bit addressing.
-                    * IOVA addresses are 48-bit wide on Tegra186.
-                    * With 64-bit dma mask used for SDHCI, accesses can
-                    * be broken. Disable 64-bit dma, which would fall back
-                    * to 32-bit dma mask. Ideally 40-bit dma mask would work,
-                    * But it is not supported as of now.
-                    */
-                   SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+        .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
         .ops  = &tegra186_sdhci_ops,
 };
 
 static const struct sdhci_tegra_soc_data soc_data_tegra186 = {
         .pdata = &sdhci_tegra186_pdata,
+        .dma_mask = DMA_BIT_MASK(40),
         .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL |
                     NVQUIRK_HAS_PADCALIB |
                     NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |
@@ -1424,6 +1431,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra186 = {
 
 static const struct sdhci_tegra_soc_data soc_data_tegra194 = {
         .pdata = &sdhci_tegra186_pdata,
+        .dma_mask = DMA_BIT_MASK(39),
         .nvquirks = NVQUIRK_NEEDS_PAD_CONTROL |
                     NVQUIRK_HAS_PADCALIB |
                     NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |