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 struct sdhci_host *host = prv->host; 37 unsigned long clock; 38 struct clk clk; 39 int ret; 40 41 ret = clk_get_by_index(dev, 0, &clk); 42 if (ret < 0) { 43 pr_debug("%s: Can't get clock for %s: %d\n", __func__, dev->name, 44 ret); 45 } 46 47 clock = clk_get_rate(&clk); 48 if (IS_ERR_VALUE(clock)) { 49 dev_err(dev, "failed to get clock\n"); 50 return ret; 51 } 52 53 debug("%s: CLK %ld\n", __func__, clock); 54 55 // host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD; 56 host->max_clk = clock; 57 58 if (host->bus_width == 8) 59 host->host_caps |= MMC_MODE_8BIT; 60 61 ret = sdhci_setup_cfg(&plat->cfg, host, host->max_clk, EMMC_MIN_FREQ); 62 63 host->mmc = &plat->mmc; 64 if (ret) 65 return ret; 66 host->mmc->priv = host; 67 host->mmc->dev = dev; 68 upriv->mmc = host->mmc; 69 70 return sdhci_probe(dev); 71 } 72 73 static int aspeed_sdhci_ofdata_to_platdata(struct udevice *dev) 74 { 75 struct aspeed_sdhci_priv *priv = dev_get_priv(dev); 76 77 priv->host = calloc(1, sizeof(struct sdhci_host)); 78 if (!priv->host) 79 return -1; 80 81 priv->host->name = dev->name; 82 priv->host->ioaddr = (void *)dev_read_addr(dev); 83 84 return 0; 85 } 86 87 static int aspeed_sdhci_bind(struct udevice *dev) 88 { 89 struct aspeed_sdhci_plat *plat = dev_get_platdata(dev); 90 91 return sdhci_bind(dev, &plat->mmc, &plat->cfg); 92 } 93 94 static const struct udevice_id aspeed_sdhci_ids[] = { 95 { .compatible = "aspeed,sdhci-ast2500" }, 96 { .compatible = "aspeed,sdhci-ast2600" }, 97 { .compatible = "aspeed,emmc-ast2600" }, 98 { } 99 }; 100 101 U_BOOT_DRIVER(aspeed_sdhci_drv) = { 102 .name = "aspeed_sdhci", 103 .id = UCLASS_MMC, 104 .of_match = aspeed_sdhci_ids, 105 .ofdata_to_platdata = aspeed_sdhci_ofdata_to_platdata, 106 .ops = &sdhci_ops, 107 .bind = aspeed_sdhci_bind, 108 .probe = aspeed_sdhci_probe, 109 .priv_auto_alloc_size = sizeof(struct aspeed_sdhci_priv), 110 .platdata_auto_alloc_size = sizeof(struct aspeed_sdhci_plat), 111 }; 112