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a8cb4fb5 SG |
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 | ||
ace2198b | 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 = 1; | |
a8cb4fb5 SG |
56 | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static int rockchip_dwmmc_probe(struct udevice *dev) | |
61 | { | |
62 | struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); | |
63 | struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); | |
64 | struct dwmci_host *host = &priv->host; | |
65 | u32 minmax[2]; | |
66 | int ret; | |
67 | ||
68 | priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); | |
69 | if (IS_ERR(priv->grf)) | |
70 | return PTR_ERR(priv->grf); | |
71 | ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk); | |
72 | if (ret) | |
73 | return ret; | |
74 | ||
75 | ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, | |
76 | "clock-freq-min-max", minmax, 2); | |
77 | if (!ret) | |
78 | ret = add_dwmci(host, minmax[1], minmax[0]); | |
79 | if (ret) | |
80 | return ret; | |
81 | ||
82 | upriv->mmc = host->mmc; | |
83 | ||
84 | return 0; | |
85 | } | |
86 | ||
87 | static const struct udevice_id rockchip_dwmmc_ids[] = { | |
88 | { .compatible = "rockchip,rk3288-dw-mshc" }, | |
89 | { } | |
90 | }; | |
91 | ||
92 | U_BOOT_DRIVER(rockchip_dwmmc_drv) = { | |
93 | .name = "rockchip_dwmmc", | |
94 | .id = UCLASS_MMC, | |
95 | .of_match = rockchip_dwmmc_ids, | |
96 | .ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata, | |
97 | .probe = rockchip_dwmmc_probe, | |
98 | .priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv), | |
99 | }; |