mmc: hi6220_dw_mmc: Add hi6220 glue code for dw_mmc controller.
authorPeter Griffin <peter.griffin@linaro.org>
Thu, 30 Jul 2015 17:55:22 +0000 (18:55 +0100)
committerLothar Waßmann <LW@KARO-electronics.de>
Thu, 10 Sep 2015 08:19:13 +0000 (10:19 +0200)
This patch adds the glue code for hi6220 SoC which has 2x synopsis
dw_mmc controllers. This will be used by the hikey board support
in subsequent patches.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
arch/arm/include/asm/arch-hi6220/dwmmc.h [new file with mode: 0644]
drivers/mmc/Makefile
drivers/mmc/hi6220_dw_mmc.c [new file with mode: 0644]

diff --git a/arch/arm/include/asm/arch-hi6220/dwmmc.h b/arch/arm/include/asm/arch-hi6220/dwmmc.h
new file mode 100644 (file)
index 0000000..c747383
--- /dev/null
@@ -0,0 +1,8 @@
+/*
+ * (C) Copyright 2015 Linaro
+ * Peter Griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width);
index 286df2f..cae207c 100644 (file)
@@ -13,6 +13,7 @@ obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o
 obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
 obj-$(CONFIG_DWMMC) += dw_mmc.o
 obj-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
+obj-$(CONFIG_HIKEY_DWMMC) += hi6220_dw_mmc.o
 obj-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
 obj-$(CONFIG_FTSDC010) += ftsdc010_mci.o
 obj-$(CONFIG_FTSDC021) += ftsdc021_sdhci.o
diff --git a/drivers/mmc/hi6220_dw_mmc.c b/drivers/mmc/hi6220_dw_mmc.c
new file mode 100644 (file)
index 0000000..731458c
--- /dev/null
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2015 Linaro
+ * peter.griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dwmmc.h>
+#include <malloc.h>
+#include <asm-generic/errno.h>
+
+#define        DWMMC_MAX_CH_NUM                4
+
+#define        DWMMC_MAX_FREQ                  50000000
+#define        DWMMC_MIN_FREQ                  400000
+
+/* Source clock is configured to 100MHz by ATF bl1*/
+#define MMC0_DEFAULT_FREQ              100000000
+
+static int hi6220_dwmci_core_init(struct dwmci_host *host, int index)
+{
+       host->name = "HiKey DWMMC";
+
+       host->dev_index = index;
+
+       /* Add the mmc channel to be registered with mmc core */
+       if (add_dwmci(host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ)) {
+               printf("DWMMC%d registration failed\n", index);
+               return -1;
+       }
+       return 0;
+}
+
+/*
+ * This function adds the mmc channel to be registered with mmc core.
+ * index -     mmc channel number.
+ * regbase -   register base address of mmc channel specified in 'index'.
+ * bus_width - operating bus width of mmc channel specified in 'index'.
+ */
+int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width)
+{
+       struct dwmci_host *host = NULL;
+
+       host = calloc(1, sizeof(struct dwmci_host));
+       if (!host) {
+               error("dwmci_host calloc failed!\n");
+               return -ENOMEM;
+       }
+
+       host->ioaddr = (void *)regbase;
+       host->buswidth = bus_width;
+       host->bus_hz = MMC0_DEFAULT_FREQ;
+
+       return hi6220_dwmci_core_init(host, index);
+}