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: Andy Fleming afleming@freescale.com --- arch/arm/include/asm/arch-socfpga/dwmmc.h | 12 +++++ drivers/mmc/Makefile | 1 + drivers/mmc/socfpga_dw_mmc.c | 72 +++++++++++++++++++++++++++++ 3 files changed, 85 insertions(+) create mode 100755 arch/arm/include/asm/arch-socfpga/dwmmc.h create mode 100755 drivers/mmc/socfpga_dw_mmc.c

diff --git a/arch/arm/include/asm/arch-socfpga/dwmmc.h b/arch/arm/include/asm/arch-socfpga/dwmmc.h new file mode 100755 index 0000000..945eb64 --- /dev/null +++ b/arch/arm/include/asm/arch-socfpga/dwmmc.h @@ -0,0 +1,12 @@ +/* + * (C) Copyright 2013 Altera Corporation <www.altera.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SOCFPGA_DWMMC_H_ +#define _SOCFPGA_DWMMC_H_ + +extern int socfpga_dwmmc_init(u32 regbase, int bus_width, int index); + +#endif /* _SOCFPGA_SDMMC_H_ */ diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index 1ed26ca..e793ed9 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 100755 index 0000000..554f51b --- /dev/null +++ b/drivers/mmc/socfpga_dw_mmc.c @@ -0,0 +1,72 @@ +/* + * (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> + +#define CLKMGR_PERPLLGRP_EN_REG (SOCFPGA_CLKMGR_ADDRESS + 0xA0) +#define CLKMGR_SDMMC_CLK_ENABLE (1 << 8) +#define SYSMGR_SDMMCGRP_CTRL_REG (SOCFPGA_SYSMGR_ADDRESS + 0x108) +#define SYSMGR_SDMMC_CTRL_GET_DRVSEL(x) (((x) >> 0) & 0x7) +#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel) \ + ((((drvsel) << 0) & 0x7) | (((smplsel) << 3) & 0x38)) + +static char *SOCFPGA_NAME = "SOCFPGA DWMMC"; + +static void socfpga_dwmci_clksel(struct dwmci_host *host) +{ + unsigned int en; + unsigned int drvsel; + unsigned int smplsel; + + /* Disable SDMMC clock. */ + en = readl(CLKMGR_PERPLLGRP_EN_REG); + en &= ~CLKMGR_SDMMC_CLK_ENABLE; + writel(en, CLKMGR_PERPLLGRP_EN_REG); + + /* Configures drv_sel and smpl_sel */ + drvsel = 3; + smplsel = 0; + + debug("%s: drvsel %d smplsel %d\n", __FUNCTION__, drvsel, smplsel); + writel(SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel), + SYSMGR_SDMMCGRP_CTRL_REG); + + debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __FUNCTION__, + readl(SYSMGR_SDMMCGRP_CTRL_REG)); + /* Enable SDMMC clock */ + en = readl(CLKMGR_PERPLLGRP_EN_REG); + en |= CLKMGR_SDMMC_CLK_ENABLE; + writel(en, CLKMGR_PERPLLGRP_EN_REG); +} + +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_DWMMC_BUS_HZ; + host->fifoth_val = MSIZE(0x2) | + RX_WMARK(CONFIG_DWMMC_FIFO_DEPTH / 2 - 1) | + TX_WMARK(CONFIG_DWMMC_FIFO_DEPTH / 2); + + add_dwmci(host, host->bus_hz, 400000); + + return 0; +} +