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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2015 Atmel Corporation * Wenyou.Yang <wenyou.yang@atmel.com> */ #include <clk.h> #include <dm.h> #include <malloc.h> #include <sdhci.h> #include <asm/arch/clk.h> #include <asm/global_data.h> #define ATMEL_SDHC_MIN_FREQ 400000 #define ATMEL_SDHC_GCK_RATE 240000000 #define ATMEL_SDHC_MC1R 0x204 #define ATMEL_SDHC_MC1R_FCD 0x80 #ifndef CONFIG_DM_MMC int atmel_sdhci_init(void *regbase, u32 id) { struct sdhci_host *host; u32 max_clk, min_clk = ATMEL_SDHC_MIN_FREQ; host = (struct sdhci_host *)calloc(1, sizeof(struct sdhci_host)); if (!host) { printf("%s: sdhci_host calloc failed\n", __func__); return -ENOMEM; } host->name = "atmel_sdhci"; host->ioaddr = regbase; host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; max_clk = at91_get_periph_generated_clk(id); if (!max_clk) { printf("%s: Failed to get the proper clock\n", __func__); free(host); return -ENODEV; } host->max_clk = max_clk; add_sdhci(host, 0, min_clk); return 0; } #else DECLARE_GLOBAL_DATA_PTR; struct atmel_sdhci_plat { struct mmc_config cfg; struct mmc mmc; }; static void atmel_sdhci_config_fcd(struct sdhci_host *host) { u8 mc1r; /* If nonremovable, assume that the card is always present. * * WA: SAMA5D2 doesn't drive CMD if using CD GPIO line. */ if ((host->mmc->cfg->host_caps & MMC_CAP_NONREMOVABLE) #if CONFIG_IS_ENABLED(DM_GPIO) || dm_gpio_get_value(&host->cd_gpio) >= 0 #endif ) { sdhci_readb(host, ATMEL_SDHC_MC1R); mc1r |= ATMEL_SDHC_MC1R_FCD; sdhci_writeb(host, mc1r, ATMEL_SDHC_MC1R); } } static int atmel_sdhci_deferred_probe(struct sdhci_host *host) { struct udevice *dev = host->mmc->dev; int ret; ret = sdhci_probe(dev); if (ret) return ret; atmel_sdhci_config_fcd(host); return 0; } static const struct sdhci_ops atmel_sdhci_ops = { .deferred_probe = atmel_sdhci_deferred_probe, }; static int atmel_sdhci_probe(struct udevice *dev) { struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); struct atmel_sdhci_plat *plat = dev_get_plat(dev); struct sdhci_host *host = dev_get_priv(dev); u32 max_clk; struct clk clk; int ret; ret = clk_get_by_index(dev, 0, &clk); if (ret) return ret; ret = clk_enable(&clk); if (ret) return ret; host->name = dev->name; host->ioaddr = dev_read_addr_ptr(dev); host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "bus-width", 4); ret = clk_get_by_index(dev, 1, &clk); if (ret) return ret; clk_set_rate(&clk, ATMEL_SDHC_GCK_RATE); max_clk = clk_get_rate(&clk); if (!max_clk) return -EINVAL; ret = clk_enable(&clk); /* return error only if the clock really has a clock enable func */ if (ret && ret != -ENOSYS) return ret; ret = mmc_of_parse(dev, &plat->cfg); if (ret) return ret; host->max_clk = max_clk; host->mmc = &plat->mmc; host->mmc->dev = dev; ret = sdhci_setup_cfg(&plat->cfg, host, 0, ATMEL_SDHC_MIN_FREQ); if (ret) return ret; host->mmc->priv = host; host->ops = &atmel_sdhci_ops; upriv->mmc = host->mmc; ret = sdhci_probe(dev); if (ret) return ret; atmel_sdhci_config_fcd(host); return 0; } static int atmel_sdhci_bind(struct udevice *dev) { struct atmel_sdhci_plat *plat = dev_get_plat(dev); return sdhci_bind(dev, &plat->mmc, &plat->cfg); } static const struct udevice_id atmel_sdhci_ids[] = { { .compatible = "atmel,sama5d2-sdhci" }, { .compatible = "microchip,sam9x60-sdhci" }, { .compatible = "microchip,sama7g5-sdhci" }, { } }; U_BOOT_DRIVER(atmel_sdhci_drv) = { .name = "atmel_sdhci", .id = UCLASS_MMC, .of_match = atmel_sdhci_ids, .ops = &sdhci_ops, .bind = atmel_sdhci_bind, .probe = atmel_sdhci_probe, .priv_auto = sizeof(struct sdhci_host), .plat_auto = sizeof(struct atmel_sdhci_plat), }; #endif |