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 = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), 54 "max-frequency", 0); 55 ret = clk_get_by_index(dev, 0, &clk); 56 #endif 57 if (!ret) { 58 ret = clk_set_rate(&clk, max_frequency); 59 if (IS_ERR_VALUE(ret)) 60 printf("%s clk set rate fail!\n", __func__); 61 } else { 62 printf("%s fail to get clk\n", __func__); 63 } 64 65 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; 66 host->max_clk = max_frequency; 67 68 ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ); 69 70 host->mmc = &plat->mmc; 71 if (ret) 72 return ret; 73 host->mmc->priv = &prv->host; 74 host->mmc->dev = dev; 75 upriv->mmc = host->mmc; 76 77 return sdhci_probe(dev); 78 } 79 80 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev) 81 { 82 #if !CONFIG_IS_ENABLED(OF_PLATDATA) 83 struct sdhci_host *host = dev_get_priv(dev); 84 85 host->name = dev->name; 86 host->ioaddr = dev_get_addr_ptr(dev); 87 #endif 88 89 return 0; 90 } 91 92 static int rockchip_sdhci_bind(struct udevice *dev) 93 { 94 struct rockchip_sdhc_plat *plat = dev_get_platdata(dev); 95 96 return sdhci_bind(dev, &plat->mmc, &plat->cfg); 97 } 98 99 static const struct udevice_id arasan_sdhci_ids[] = { 100 { .compatible = "arasan,sdhci-5.1" }, 101 { } 102 }; 103 104 U_BOOT_DRIVER(arasan_sdhci_drv) = { 105 .name = "rockchip_rk3399_sdhci_5_1", 106 .id = UCLASS_MMC, 107 .of_match = arasan_sdhci_ids, 108 .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata, 109 .ops = &sdhci_ops, 110 .bind = rockchip_sdhci_bind, 111 .probe = arasan_sdhci_probe, 112 .priv_auto_alloc_size = sizeof(struct rockchip_sdhc), 113 .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat), 114 }; 115