1 /* 2 * Copyright (c) 2013 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <clk.h> 9 #include <dm.h> 10 #include <dwmmc.h> 11 #include <errno.h> 12 #include <syscon.h> 13 #include <asm/arch/clock.h> 14 #include <asm/arch/periph.h> 15 #include <linux/err.h> 16 17 DECLARE_GLOBAL_DATA_PTR; 18 19 struct rockchip_dwmmc_priv { 20 struct udevice *clk; 21 struct rk3288_grf *grf; 22 struct dwmci_host host; 23 }; 24 25 static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq) 26 { 27 struct udevice *dev = host->priv; 28 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); 29 int ret; 30 31 ret = clk_set_periph_rate(priv->clk, PERIPH_ID_SDMMC0 + host->dev_index, 32 freq); 33 if (ret < 0) { 34 debug("%s: err=%d\n", __func__, ret); 35 return ret; 36 } 37 38 return freq; 39 } 40 41 static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev) 42 { 43 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); 44 struct dwmci_host *host = &priv->host; 45 46 host->name = dev->name; 47 host->ioaddr = (void *)dev_get_addr(dev); 48 host->buswidth = fdtdec_get_int(gd->fdt_blob, dev->of_offset, 49 "bus-width", 4); 50 host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk; 51 host->priv = dev; 52 53 /* use non-removeable as sdcard and emmc as judgement */ 54 if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "non-removable")) 55 host->dev_index = 0; 56 else 57 host->dev_index = 1; 58 59 return 0; 60 } 61 62 static int rockchip_dwmmc_probe(struct udevice *dev) 63 { 64 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 65 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); 66 struct dwmci_host *host = &priv->host; 67 u32 minmax[2]; 68 int ret; 69 int fifo_depth; 70 71 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 72 if (IS_ERR(priv->grf)) 73 return PTR_ERR(priv->grf); 74 ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk); 75 if (ret) 76 return ret; 77 78 if (fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, 79 "clock-freq-min-max", minmax, 2)) 80 return -EINVAL; 81 82 fifo_depth = fdtdec_get_int(gd->fdt_blob, dev->of_offset, 83 "fifo-depth", 0); 84 if (fifo_depth < 0) 85 return -EINVAL; 86 87 host->fifoth_val = MSIZE(0x2) | 88 RX_WMARK(fifo_depth / 2 - 1) | TX_WMARK(fifo_depth / 2); 89 90 if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "fifo-mode")) 91 host->fifo_mode = true; 92 93 ret = add_dwmci(host, minmax[1], minmax[0]); 94 if (ret) 95 return ret; 96 97 upriv->mmc = host->mmc; 98 99 return 0; 100 } 101 102 static const struct udevice_id rockchip_dwmmc_ids[] = { 103 { .compatible = "rockchip,rk3288-dw-mshc" }, 104 { } 105 }; 106 107 U_BOOT_DRIVER(rockchip_dwmmc_drv) = { 108 .name = "rockchip_dwmmc", 109 .id = UCLASS_MMC, 110 .of_match = rockchip_dwmmc_ids, 111 .ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata, 112 .probe = rockchip_dwmmc_probe, 113 .priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv), 114 }; 115