1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd 4 * 5 * Rockchip SD Host Controller Interface 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <dt-structs.h> 11 #include <linux/libfdt.h> 12 #include <malloc.h> 13 #include <mapmem.h> 14 #include <sdhci.h> 15 #include <clk.h> 16 17 /* 400KHz is max freq for card ID etc. Use that as min */ 18 #define EMMC_MIN_FREQ 400000 19 20 struct aspeed_sdhci_plat { 21 struct mmc_config cfg; 22 struct mmc mmc; 23 unsigned int f_max; 24 }; 25 26 struct aspeed_sdhci_priv { 27 struct sdhci_host *host; 28 struct clk clk; 29 }; 30 31 static int aspeed_sdhci_probe(struct udevice *dev) 32 { 33 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 34 struct aspeed_sdhci_plat *plat = dev_get_platdata(dev); 35 struct aspeed_sdhci_priv *prv = dev_get_priv(dev); 36 int node = dev_of_offset(dev); 37 struct sdhci_host *host = prv->host; 38 unsigned long clock; 39 struct clk clk; 40 int ret; 41 42 ret = clk_get_by_index(dev, 0, &clk); 43 if (ret < 0) { 44 pr_debug("%s: Can't get clock for %s: %d\n", __func__, dev->name, 45 ret); 46 } 47 48 clock = clk_get_rate(&clk); 49 if (IS_ERR_VALUE(clock)) { 50 dev_err(dev, "failed to get clock\n"); 51 return ret; 52 } 53 54 debug("%s: CLK %ld\n", __func__, clock); 55 56 gpio_request_by_name_nodev(offset_to_ofnode(node), "pwr-gpios", 0, 57 &host->pwr_gpio, GPIOD_IS_OUT); 58 gpio_request_by_name_nodev(offset_to_ofnode(node), "pwr-sw-gpios", 0, 59 &host->pwr_sw_gpio, GPIOD_IS_OUT); 60 61 if (dm_gpio_is_valid(&host->pwr_gpio)) { 62 dm_gpio_set_value(&host->pwr_gpio, 1); 63 if (ret) { 64 debug("MMC not configured\n"); 65 return ret; 66 } 67 } 68 69 // host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; 70 host->max_clk = clock; 71 72 if (host->bus_width == 8) 73 host->host_caps |= MMC_MODE_8BIT; 74 75 ret = sdhci_setup_cfg(&plat->cfg, host, host->max_clk, EMMC_MIN_FREQ); 76 77 host->mmc = &plat->mmc; 78 if (ret) 79 return ret; 80 host->mmc->priv = host; 81 host->mmc->dev = dev; 82 upriv->mmc = host->mmc; 83 84 return sdhci_probe(dev); 85 } 86 87 static int aspeed_sdhci_ofdata_to_platdata(struct udevice *dev) 88 { 89 struct aspeed_sdhci_priv *priv = dev_get_priv(dev); 90 91 priv->host = calloc(1, sizeof(struct sdhci_host)); 92 if (!priv->host) 93 return -1; 94 95 priv->host->name = dev->name; 96 priv->host->ioaddr = (void *)dev_read_addr(dev); 97 98 return 0; 99 } 100 101 static int aspeed_sdhci_bind(struct udevice *dev) 102 { 103 struct aspeed_sdhci_plat *plat = dev_get_platdata(dev); 104 105 return sdhci_bind(dev, &plat->mmc, &plat->cfg); 106 } 107 108 static const struct udevice_id aspeed_sdhci_ids[] = { 109 { .compatible = "aspeed,sdhci-ast2500" }, 110 { .compatible = "aspeed,sdhci-ast2600" }, 111 { .compatible = "aspeed,emmc-ast2600" }, 112 { } 113 }; 114 115 U_BOOT_DRIVER(aspeed_sdhci_drv) = { 116 .name = "aspeed_sdhci", 117 .id = UCLASS_MMC, 118 .of_match = aspeed_sdhci_ids, 119 .ofdata_to_platdata = aspeed_sdhci_ofdata_to_platdata, 120 .ops = &sdhci_ops, 121 .bind = aspeed_sdhci_bind, 122 .probe = aspeed_sdhci_probe, 123 .priv_auto_alloc_size = sizeof(struct aspeed_sdhci_priv), 124 .platdata_auto_alloc_size = sizeof(struct aspeed_sdhci_plat), 125 }; 126