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authorChin Liang See <clsee@altera.com>2013-12-30 18:26:14 -0600
committerPantelis Antoniou <panto@antoniou-consulting.com>2014-01-09 11:53:55 +0200
commitc5c1af21764d9423b45c1d03e835c4547a8bc5cb (patch)
tree9677624d4c2471a0e9b4c623d8ad982964c7fd50 /drivers/mmc
parentab71188ce87ebb66192a5bdbbb9d58052bd32d93 (diff)
socfpga/dwmmc: Adding DesignWare MMC driver support for SOCFPGA
To add the DesignWare MMC driver support for Altera SOCFPGA. It required information such as clocks and bus width from platform specific files (SOCFPGA handoff files) Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Rajeshwari Shinde <rajeshwari.s@samsung.com> Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Pantelis Antoniou <panto@antoniou-consulting.com> Cc: Wolfgang Denk <wd@denx.de> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/Makefile1
-rw-r--r--drivers/mmc/socfpga_dw_mmc.c68
2 files changed, 69 insertions, 0 deletions
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 1ed26cab34..e793ed994e 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
obj-$(CONFIG_DWMMC) += dw_mmc.o
obj-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
+obj-$(CONFIG_SOCFPGA_DWMMC) += socfpga_dw_mmc.o
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
else
diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
new file mode 100644
index 0000000000..bc53a5da27
--- /dev/null
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2013 Altera Corporation <www.altera.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <dwmmc.h>
+#include <asm/arch/dwmmc.h>
+#include <asm/arch/clock_manager.h>
+#include <asm/arch/system_manager.h>
+
+static const struct socfpga_clock_manager *clock_manager_base =
+ (void *)SOCFPGA_CLKMGR_ADDRESS;
+static const struct socfpga_system_manager *system_manager_base =
+ (void *)SOCFPGA_SYSMGR_ADDRESS;
+
+static char *SOCFPGA_NAME = "SOCFPGA DWMMC";
+
+static void socfpga_dwmci_clksel(struct dwmci_host *host)
+{
+ unsigned int drvsel;
+ unsigned int smplsel;
+
+ /* Disable SDMMC clock. */
+ clrbits_le32(&clock_manager_base->per_pll_en,
+ CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
+
+ /* Configures drv_sel and smpl_sel */
+ drvsel = CONFIG_SOCFPGA_DWMMC_DRVSEL;
+ smplsel = CONFIG_SOCFPGA_DWMMC_SMPSEL;
+
+ debug("%s: drvsel %d smplsel %d\n", __func__, drvsel, smplsel);
+ writel(SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel),
+ &system_manager_base->sdmmcgrp_ctrl);
+
+ debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __func__,
+ readl(&system_manager_base->sdmmcgrp_ctrl));
+
+ /* Enable SDMMC clock */
+ setbits_le32(&clock_manager_base->per_pll_en,
+ CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
+}
+
+int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
+{
+ struct dwmci_host *host = NULL;
+ host = calloc(sizeof(struct dwmci_host), 1);
+ if (!host) {
+ printf("dwmci_host calloc fail!\n");
+ return -1;
+ }
+
+ host->name = SOCFPGA_NAME;
+ host->ioaddr = (void *)regbase;
+ host->buswidth = bus_width;
+ host->clksel = socfpga_dwmci_clksel;
+ host->dev_index = index;
+ /* fixed clock divide by 4 which due to the SDMMC wrapper */
+ host->bus_hz = CONFIG_SOCFPGA_DWMMC_BUS_HZ;
+ host->fifoth_val = MSIZE(0x2) |
+ RX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2 - 1) |
+ TX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2);
+
+ return add_dwmci(host, host->bus_hz, 400000);
+}
+