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 /* TODO(sjg@chromium.org): Remove the need for this hack */ 54 host->dev_index = (ulong)host->ioaddr == 0xff0f0000 ? 0 : 1; 55 56 return 0; 57 } 58 59 static int rockchip_dwmmc_probe(struct udevice *dev) 60 { 61 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); 62 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); 63 struct dwmci_host *host = &priv->host; 64 u32 minmax[2]; 65 int ret; 66 67 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); 68 if (IS_ERR(priv->grf)) 69 return PTR_ERR(priv->grf); 70 ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk); 71 if (ret) 72 return ret; 73 74 ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, 75 "clock-freq-min-max", minmax, 2); 76 if (!ret) 77 ret = add_dwmci(host, minmax[1], minmax[0]); 78 if (ret) 79 return ret; 80 81 upriv->mmc = host->mmc; 82 83 return 0; 84 } 85 86 static const struct udevice_id rockchip_dwmmc_ids[] = { 87 { .compatible = "rockchip,rk3288-dw-mshc" }, 88 { } 89 }; 90 91 U_BOOT_DRIVER(rockchip_dwmmc_drv) = { 92 .name = "rockchip_dwmmc", 93 .id = UCLASS_MMC, 94 .of_match = rockchip_dwmmc_ids, 95 .ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata, 96 .probe = rockchip_dwmmc_probe, 97 .priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv), 98 }; 99