mmc: sdhci: Allow disabling of SDMA in SPL

Rockchip emmc devices have a similar issue to Rockchip dwmmc devices,
where performing DMA to SRAM later causes issues with suspend/resume.

Allow us to toggle SDMA in SPL for sdhci similar to ADMA support, so we
can ensure DMA is not used when loading the SRAM code.

Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
[jonas@kwiboo.se: add Kconfig default value and fix ADMA typo]
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 59fb0fb..de01b96 100644 (file)
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -476,6 +476,14 @@ config MMC_SDHCI_SDMA
          This enables support for the SDMA (Single Operation DMA) defined
          in the SD Host Controller Standard Specification Version 1.00 .
 
+config SPL_MMC_SDHCI_SDMA
+       bool "Support SDHCI SDMA in SPL"
+       depends on SPL_MMC && MMC_SDHCI
+       default y if MMC_SDHCI_SDMA
+       help
+         This enables support for the SDMA (Single Operation DMA) defined
+         in the SD Host Controller Standard Specification Version 1.00 in SPL.
+
 config MMC_SDHCI_ADMA
        bool "Support SDHCI ADMA2"
        depends on MMC_SDHCI

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 86f81f5..9cbe126 100644 (file)
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -70,7 +70,7 @@ static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
        }
 }
 
-#if (defined(CONFIG_MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
+#if (CONFIG_IS_ENABLED(MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
 static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
                              int *is_aligned, int trans_bytes)
 {
@@ -177,7 +177,7 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data)
                }
        } while (!(stat & SDHCI_INT_DATA_END));
 
-#if (defined(CONFIG_MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
+#if (CONFIG_IS_ENABLED(MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
        dma_unmap_single(host->start_addr, data->blocks * data->blocksize,
                         mmc_get_dma_dir(data));
 #endif
@@ -877,7 +877,7 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 #endif
        debug("%s, caps: 0x%x\n", __func__, caps);
 
-#ifdef CONFIG_MMC_SDHCI_SDMA
+#if CONFIG_IS_ENABLED(MMC_SDHCI_SDMA)
        if ((caps & SDHCI_CAN_DO_SDMA)) {
                host->flags |= USE_SDMA;
        } else {
@@ -887,7 +887,7 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 #endif
 #if CONFIG_IS_ENABLED(MMC_SDHCI_ADMA)
        if (!(caps & SDHCI_CAN_DO_ADMA2)) {
-               printf("%s: Your controller doesn't support SDMA!!\n",
+               printf("%s: Your controller doesn't support ADMA!!\n",
                       __func__);
                return -EINVAL;
        }