1 /* 2 * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd 3 * 4 * Rockchip SD Host Controller Interface 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include <common.h> 10 #include <dm.h> 11 #include <dt-structs.h> 12 #include <fdtdec.h> 13 #include <libfdt.h> 14 #include <malloc.h> 15 #include <mapmem.h> 16 #include <sdhci.h> 17 #include <clk.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 /* 400KHz is max freq for card ID etc. Use that as min */ 21 #define EMMC_MIN_FREQ 400000 22 23 struct rockchip_sdhc_plat { 24 #if CONFIG_IS_ENABLED(OF_PLATDATA) 25 struct dtd_rockchip_rk3399_sdhci_5_1 dtplat; 26 #endif 27 struct mmc_config cfg; 28 struct mmc mmc; 29 }; 30 31 struct rockchip_sdhc { 32 struct sdhci_host host; 33 void *base; 34 }; 35 36 static int arasan_sdhci_probe(struct udevice *dev) 37 { 38 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 39 struct rockchip_sdhc_plat *plat = dev_get_platdata(dev); 40 struct rockchip_sdhc *prv = dev_get_priv(dev); 41 struct sdhci_host *host = &prv->host; 42 int max_frequency, ret; 43 struct clk clk; 44 45 #if CONFIG_IS_ENABLED(OF_PLATDATA) 46 struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat; 47 48 host->name = dev->name; 49 host->ioaddr = map_sysmem(dtplat->reg[1], dtplat->reg[3]); 50 max_frequency = dtplat->max_frequency; 51 ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk); 52 #else 53 max_frequency = dev_read_u32_default(dev, "max-frequency", 0); 54 ret = clk_get_by_index(dev, 0, &clk); 55 #endif 56 if (!ret) { 57 ret = clk_set_rate(&clk, max_frequency); 58 if (IS_ERR_VALUE(ret)) 59 printf("%s clk set rate fail!\n", __func__); 60 } else { 61 printf("%s fail to get clk\n", __func__); 62 } 63 64 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; 65 host->max_clk = max_frequency; 66 67 ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ); 68 69 host->mmc = &plat->mmc; 70 if (ret) 71 return ret; 72 host->mmc->priv = &prv->host; 73 host->mmc->dev = dev; 74 upriv->mmc = host->mmc; 75 76 return sdhci_probe(dev); 77 } 78 79 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev) 80 { 81 #if !CONFIG_IS_ENABLED(OF_PLATDATA) 82 struct sdhci_host *host = dev_get_priv(dev); 83 84 host->name = dev->name; 85 host->ioaddr = devfdt_get_addr_ptr(dev); 86 #endif 87 88 return 0; 89 } 90 91 static int rockchip_sdhci_bind(struct udevice *dev) 92 { 93 struct rockchip_sdhc_plat *plat = dev_get_platdata(dev); 94 95 return sdhci_bind(dev, &plat->mmc, &plat->cfg); 96 } 97 98 static const struct udevice_id arasan_sdhci_ids[] = { 99 { .compatible = "arasan,sdhci-5.1" }, 100 { } 101 }; 102 103 U_BOOT_DRIVER(arasan_sdhci_drv) = { 104 .name = "rockchip_rk3399_sdhci_5_1", 105 .id = UCLASS_MMC, 106 .of_match = arasan_sdhci_ids, 107 .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata, 108 .ops = &sdhci_ops, 109 .bind = rockchip_sdhci_bind, 110 .probe = arasan_sdhci_probe, 111 .priv_auto_alloc_size = sizeof(struct rockchip_sdhc), 112 .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat), 113 }; 114