diff options
Diffstat (limited to 'drivers/mmc/starfive_jh_dw_mmc.c')
-rw-r--r-- | drivers/mmc/starfive_jh_dw_mmc.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/mmc/starfive_jh_dw_mmc.c b/drivers/mmc/starfive_jh_dw_mmc.c new file mode 100644 index 0000000000..d8f57e4fc5 --- /dev/null +++ b/drivers/mmc/starfive_jh_dw_mmc.c @@ -0,0 +1,163 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Synopsys DesignWare Multimedia Card Interface driver + * extensions used in StarFive JH 7100. + * + * Copyright (C) 2019 Synopsys + * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> + * Modified by StarFive Technology + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <dwmmc.h> +#include <errno.h> +#include <fdtdec.h> +#include <dm/device_compat.h> +#include <linux/libfdt.h> +#include <linux/err.h> +#include <malloc.h> + +#define CLOCK_MIN 400000 /* 400 kHz */ +#define FIFO_MIN 8 +#define FIFO_MAX 4096 +#define DWMMC_BUS_FREQ 100000000 + +struct starfive_jh_dwmci_plat { + struct mmc_config cfg; + struct mmc mmc; +}; + +struct starfive_jh_dwmci_priv_data { + struct dwmci_host host; + u32 f_max; +}; + +static int starfive_jh_dwmmc_of_to_plat(struct udevice *dev) +{ + struct starfive_jh_dwmci_priv_data *priv = dev_get_priv(dev); + struct dwmci_host *host = &priv->host; + u32 fifo_depth; + int ret; + + host->ioaddr = dev_read_addr_ptr(dev); + + /* + * If fifo-depth is unset don't set fifoth_val - we will try to + * auto detect it. + */ + ret = dev_read_u32(dev, "fifo-depth", &fifo_depth); + if (!ret) { + if (fifo_depth < FIFO_MIN || fifo_depth > FIFO_MAX) + return -EINVAL; + } + host->fifoth_val = MSIZE(0x2) | + RX_WMARK(fifo_depth / 2 - 1) | + TX_WMARK(fifo_depth / 2); + + + host->buswidth = dev_read_u32_default(dev, "bus-width", 4); + if (host->buswidth != 1 && host->buswidth != 4 && host->buswidth != 8) + return -EINVAL; + + /* + * If max-frequency is unset don't set priv->f_max - we will use + * host->bus_hz in probe() instead. + */ + ret = dev_read_u32(dev, "max-frequency", &priv->f_max); + if (!ret && priv->f_max < CLOCK_MIN) + return -EINVAL; + +// host->fifo_mode = dev_read_bool(dev, "fifo-mode"); + host->name = dev->name; + host->dev_index = 0; + host->priv = priv; + + return 0; +} + +int starfive_jh_dwmmc_getcd(struct udevice *dev) +{ + struct starfive_jh_dwmci_priv_data *priv = dev_get_priv(dev); + struct dwmci_host *host = &priv->host; + + u32 ret = dwmci_readl(host, DWMCI_CDETECT); +#if CONFIG_IS_ENABLED(TARGET_STARFIVE_JH7100) + printf("MMC CD is 0x%x, force to True.\n", ret); + return 1; +#else + return !(ret & 1); +#endif +} + +struct dm_mmc_ops starfive_jh_dwmci_dm_ops; + +static int starfive_jh_dwmmc_probe(struct udevice *dev) +{ +#ifdef CONFIG_BLK + struct starfive_jh_dwmci_plat *plat = dev_get_plat(dev); +#else + int ret; +#endif + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct starfive_jh_dwmci_priv_data *priv = dev_get_priv(dev); + struct dwmci_host *host = &priv->host; + unsigned int clock_max; + + /* Extend generic 'dm_dwmci_ops' with our 'getcd' implementation */ + memcpy(&starfive_jh_dwmci_dm_ops, &dm_dwmci_ops, sizeof(struct dm_mmc_ops)); + starfive_jh_dwmci_dm_ops.get_cd = starfive_jh_dwmmc_getcd; + + host->bus_hz = DWMMC_BUS_FREQ; + + if (!priv->f_max) + clock_max = host->bus_hz; + else + clock_max = min_t(unsigned int, host->bus_hz, priv->f_max); + +#ifdef CONFIG_BLK + dwmci_setup_cfg(&plat->cfg, host, clock_max, CLOCK_MIN); + host->mmc = &plat->mmc; +#else + ret = add_dwmci(host, clock_max, CLOCK_MIN); + if (ret) + return ret; +#endif + host->mmc->priv = &priv->host; + upriv->mmc = host->mmc; + host->mmc->dev = dev; + + return dwmci_probe(dev); +} + +static int starfive_jh_dwmmc_bind(struct udevice *dev) +{ +#ifdef CONFIG_BLK + struct starfive_jh_dwmci_plat *plat = dev_get_plat(dev); + int ret; + + ret = dwmci_bind(dev, &plat->mmc, &plat->cfg); + if (ret) + return ret; +#endif + + return 0; +} + +static const struct udevice_id starfive_jh_dwmmc_ids[] = { + { .compatible = "snps,dw-mshc" }, + { } +}; + +U_BOOT_DRIVER(starfive_jh_dwmmc_drv) = { + .name = "JH DWMMC0", + .id = UCLASS_MMC, + .of_match = starfive_jh_dwmmc_ids, + .of_to_plat = starfive_jh_dwmmc_of_to_plat, + .ops = &starfive_jh_dwmci_dm_ops, + .bind = starfive_jh_dwmmc_bind, + .probe = starfive_jh_dwmmc_probe, + .priv_auto = sizeof(struct starfive_jh_dwmci_priv_data), + .plat_auto = sizeof(struct starfive_jh_dwmci_plat), +}; |