diff options
Diffstat (limited to 'drivers/mmc/f_sdh30.c')
| -rw-r--r-- | drivers/mmc/f_sdh30.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/drivers/mmc/f_sdh30.c b/drivers/mmc/f_sdh30.c new file mode 100644 index 00000000000..f47cf848521 --- /dev/null +++ b/drivers/mmc/f_sdh30.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Socionext F_SDH30 eMMC driver + * Copyright 2021 Linaro Ltd. + * Copyright 2021 Socionext, Inc. + */ + +#include <clk.h> +#include <dm.h> +#include <malloc.h> +#include <sdhci.h> + +#define F_SDH30_ESD_CONTROL 0x124 +#define F_SDH30_CMD_DAT_DELAY BIT(9) + +#define F_SDH30_TEST 0x158 +#define F_SDH30_FORCE_CARD_INSERT BIT(6) + +struct f_sdh30_data { + void (*init)(struct udevice *dev); + u32 quirks; +}; + +struct f_sdh30_plat { + struct mmc_config cfg; + struct mmc mmc; + + bool enable_cmd_dat_delay; + const struct f_sdh30_data *data; +}; + +DECLARE_GLOBAL_DATA_PTR; + +static void f_sdh30_e51_init(struct udevice *dev) +{ + struct f_sdh30_plat *plat = dev_get_plat(dev); + struct sdhci_host *host = dev_get_priv(dev); + u32 val; + + val = sdhci_readl(host, F_SDH30_ESD_CONTROL); + if (plat->enable_cmd_dat_delay) + val |= F_SDH30_CMD_DAT_DELAY; + else + val &= ~F_SDH30_CMD_DAT_DELAY; + sdhci_writel(host, val, F_SDH30_ESD_CONTROL); + + val = sdhci_readl(host, F_SDH30_TEST); + if (plat->cfg.host_caps & MMC_CAP_NONREMOVABLE) + val |= F_SDH30_FORCE_CARD_INSERT; + else + val &= ~F_SDH30_FORCE_CARD_INSERT; + sdhci_writel(host, val, F_SDH30_TEST); +} + +static int f_sdh30_sdhci_probe(struct udevice *dev) +{ + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct f_sdh30_plat *plat = dev_get_plat(dev); + struct sdhci_host *host = dev_get_priv(dev); + int ret; + + plat->data = (const struct f_sdh30_data *)dev_get_driver_data(dev); + + ret = mmc_of_parse(dev, &plat->cfg); + if (ret) + return ret; + + host->mmc = &plat->mmc; + host->mmc->dev = dev; + host->mmc->priv = host; + + if (plat->data && plat->data->quirks) + host->quirks = plat->data->quirks; + + ret = sdhci_setup_cfg(&plat->cfg, host, 200000000, 400000); + if (ret) + return ret; + + upriv->mmc = host->mmc; + + mmc_set_clock(host->mmc, host->mmc->cfg->f_min, MMC_CLK_ENABLE); + + ret = sdhci_probe(dev); + if (ret) + return ret; + + if (plat->data && plat->data->init) + plat->data->init(dev); + + return 0; +} + +static int f_sdh30_of_to_plat(struct udevice *dev) +{ + struct sdhci_host *host = dev_get_priv(dev); + struct f_sdh30_plat *plat = dev_get_plat(dev); + + host->name = strdup(dev->name); + host->ioaddr = dev_read_addr_ptr(dev); + host->bus_width = dev_read_u32_default(dev, "bus-width", 4); + host->index = dev_read_u32_default(dev, "index", 0); + + plat->enable_cmd_dat_delay = + dev_read_bool(dev, "socionext,enable-cmd-dat-delay"); + + return 0; +} + +static int f_sdh30_bind(struct udevice *dev) +{ + struct f_sdh30_plat *plat = dev_get_plat(dev); + + return sdhci_bind(dev, &plat->mmc, &plat->cfg); +} + +static const struct f_sdh30_data f_sdh30_e51_data = { + .init = f_sdh30_e51_init, + .quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_SUPPORT_SINGLE, +}; + +static const struct udevice_id f_sdh30_mmc_ids[] = { + { + .compatible = "fujitsu,mb86s70-sdhci-3.0", + }, + { + .compatible = "socionext,f-sdh30-e51-mmc", + .data = (ulong)&f_sdh30_e51_data, + }, + { } +}; + +U_BOOT_DRIVER(f_sdh30_drv) = { + .name = "f_sdh30_sdhci", + .id = UCLASS_MMC, + .of_match = f_sdh30_mmc_ids, + .of_to_plat = f_sdh30_of_to_plat, + .ops = &sdhci_ops, + .bind = f_sdh30_bind, + .probe = f_sdh30_sdhci_probe, + .priv_auto = sizeof(struct sdhci_host), + .plat_auto = sizeof(struct f_sdh30_plat), +}; |