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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2019 Cortina Access
- * Arthur Li <arthur.li@cortina-access.com>
- */
- #include <common.h>
- #include <dwmmc.h>
- #include <fdtdec.h>
- #include <linux/libfdt.h>
- #include <malloc.h>
- #include <errno.h>
- #include <dm.h>
- #include <mapmem.h>
- #define SD_CLK_SEL_MASK (0x3)
- #define SD_DLL_DEFAULT (0x143000)
- #define SD_SCLK_MAX (200000000)
- #define SD_CLK_SEL_200MHZ (0x2)
- #define SD_CLK_SEL_100MHZ (0x1)
- #define SD_CLK_SEL_50MHZ (0x0)
- #define IO_DRV_SD_DS_OFFSET (16)
- #define IO_DRV_SD_DS_MASK (0xff << IO_DRV_SD_DS_OFFSET)
- #define MIN_FREQ (400000)
- DECLARE_GLOBAL_DATA_PTR;
- struct ca_mmc_plat {
- struct mmc_config cfg;
- struct mmc mmc;
- };
- struct ca_dwmmc_priv_data {
- struct dwmci_host host;
- void __iomem *sd_dll_reg;
- void __iomem *io_drv_reg;
- u8 ds;
- };
- static void ca_dwmci_clksel(struct dwmci_host *host)
- {
- struct ca_dwmmc_priv_data *priv = host->priv;
- u32 val = readl(priv->sd_dll_reg);
- val &= ~SD_CLK_SEL_MASK;
- if (host->bus_hz >= 200000000)
- val |= SD_CLK_SEL_200MHZ;
- else if (host->bus_hz >= 100000000)
- val |= SD_CLK_SEL_100MHZ;
- writel(val, priv->sd_dll_reg);
- }
- static void ca_dwmci_board_init(struct dwmci_host *host)
- {
- struct ca_dwmmc_priv_data *priv = host->priv;
- u32 val = readl(priv->io_drv_reg);
- writel(SD_DLL_DEFAULT, priv->sd_dll_reg);
- val &= ~IO_DRV_SD_DS_MASK;
- if (priv && priv->ds)
- val |= priv->ds << IO_DRV_SD_DS_OFFSET;
- writel(val, priv->io_drv_reg);
- }
- unsigned int ca_dwmci_get_mmc_clock(struct dwmci_host *host, uint freq)
- {
- struct ca_dwmmc_priv_data *priv = host->priv;
- u8 sd_clk_sel = readl(priv->sd_dll_reg) & SD_CLK_SEL_MASK;
- u8 clk_div;
- switch (sd_clk_sel) {
- case SD_CLK_SEL_50MHZ:
- clk_div = 4;
- break;
- case SD_CLK_SEL_100MHZ:
- clk_div = 2;
- break;
- default:
- clk_div = 1;
- }
- return SD_SCLK_MAX / clk_div / (host->div + 1);
- }
- static int ca_dwmmc_ofdata_to_platdata(struct udevice *dev)
- {
- struct ca_dwmmc_priv_data *priv = dev_get_priv(dev);
- struct dwmci_host *host = &priv->host;
- u32 tmp;
- host->name = dev->name;
- host->dev_index = 0;
- host->buswidth = dev_read_u32_default(dev, "bus-width", 1);
- host->bus_hz = dev_read_u32_default(dev, "max-frequency", 50000000);
- priv->ds = dev_read_u32_default(dev, "io_ds", 0x33);
- host->fifo_mode = dev_read_bool(dev, "fifo-mode");
- dev_read_u32(dev, "sd_dll_ctrl", &tmp);
- priv->sd_dll_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t));
- if (!priv->sd_dll_reg)
- return -EINVAL;
- dev_read_u32(dev, "io_drv_ctrl", &tmp);
- priv->io_drv_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t));
- if (!priv->io_drv_reg)
- return -EINVAL;
- host->ioaddr = dev_read_addr_ptr(dev);
- if (!host->ioaddr)
- return -EINVAL;
- host->priv = priv;
- return 0;
- }
- struct dm_mmc_ops ca_dwmci_dm_ops;
- static int ca_dwmmc_probe(struct udevice *dev)
- {
- struct ca_mmc_plat *plat = dev_get_platdata(dev);
- struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
- struct ca_dwmmc_priv_data *priv = dev_get_priv(dev);
- struct dwmci_host *host = &priv->host;
- memcpy(&ca_dwmci_dm_ops, &dm_dwmci_ops, sizeof(struct dm_mmc_ops));
- dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, MIN_FREQ);
- if (host->buswidth == 1)
- (&plat->cfg)->host_caps &= ~(MMC_MODE_8BIT | MMC_MODE_4BIT);
- host->mmc = &plat->mmc;
- host->mmc->priv = &priv->host;
- upriv->mmc = host->mmc;
- host->mmc->dev = dev;
- host->clksel = ca_dwmci_clksel;
- host->board_init = ca_dwmci_board_init;
- host->get_mmc_clk = ca_dwmci_get_mmc_clock;
- return dwmci_probe(dev);
- }
- static int ca_dwmmc_bind(struct udevice *dev)
- {
- struct ca_mmc_plat *plat = dev_get_platdata(dev);
- return dwmci_bind(dev, &plat->mmc, &plat->cfg);
- }
- static const struct udevice_id ca_dwmmc_ids[] = {
- { .compatible = "cortina,ca-mmc" },
- { }
- };
- U_BOOT_DRIVER(ca_dwmmc_drv) = {
- .name = "cortina_dwmmc",
- .id = UCLASS_MMC,
- .of_match = ca_dwmmc_ids,
- .ofdata_to_platdata = ca_dwmmc_ofdata_to_platdata,
- .bind = ca_dwmmc_bind,
- .ops = &ca_dwmci_dm_ops,
- .probe = ca_dwmmc_probe,
- .priv_auto_alloc_size = sizeof(struct ca_dwmmc_priv_data),
- .platdata_auto_alloc_size = sizeof(struct ca_mmc_plat),
- };
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