]> git.sur5r.net Git - u-boot/blob - drivers/mmc/rockchip_sdhci.c
dm: core: Replace of_offset with accessor
[u-boot] / drivers / mmc / rockchip_sdhci.c
1 /*
2  * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
3  *
4  * Rockchip SD Host Controller Interface
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <dm.h>
11 #include <fdtdec.h>
12 #include <libfdt.h>
13 #include <malloc.h>
14 #include <sdhci.h>
15 #include <clk.h>
16
17 DECLARE_GLOBAL_DATA_PTR;
18 /* 400KHz is max freq for card ID etc. Use that as min */
19 #define EMMC_MIN_FREQ   400000
20
21 struct rockchip_sdhc_plat {
22         struct mmc_config cfg;
23         struct mmc mmc;
24 };
25
26 struct rockchip_sdhc {
27         struct sdhci_host host;
28         void *base;
29 };
30
31 static int arasan_sdhci_probe(struct udevice *dev)
32 {
33         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
34         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
35         struct rockchip_sdhc *prv = dev_get_priv(dev);
36         struct sdhci_host *host = &prv->host;
37         int max_frequency, ret;
38         struct clk clk;
39
40
41         max_frequency = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
42                         "max-frequency", 0);
43         ret = clk_get_by_index(dev, 0, &clk);
44         if (!ret) {
45                 ret = clk_set_rate(&clk, max_frequency);
46                 if (IS_ERR_VALUE(ret))
47                         printf("%s clk set rate fail!\n", __func__);
48         } else {
49                 printf("%s fail to get clk\n", __func__);
50         }
51
52         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
53         host->max_clk = max_frequency;
54
55         ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
56
57         host->mmc = &plat->mmc;
58         if (ret)
59                 return ret;
60         host->mmc->priv = &prv->host;
61         host->mmc->dev = dev;
62         upriv->mmc = host->mmc;
63
64         return sdhci_probe(dev);
65 }
66
67 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
68 {
69         struct sdhci_host *host = dev_get_priv(dev);
70
71         host->name = dev->name;
72         host->ioaddr = dev_get_addr_ptr(dev);
73
74         return 0;
75 }
76
77 static int rockchip_sdhci_bind(struct udevice *dev)
78 {
79         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
80
81         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
82 }
83
84 static const struct udevice_id arasan_sdhci_ids[] = {
85         { .compatible = "arasan,sdhci-5.1" },
86         { }
87 };
88
89 U_BOOT_DRIVER(arasan_sdhci_drv) = {
90         .name           = "arasan_sdhci",
91         .id             = UCLASS_MMC,
92         .of_match       = arasan_sdhci_ids,
93         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
94         .ops            = &sdhci_ops,
95         .bind           = rockchip_sdhci_bind,
96         .probe          = arasan_sdhci_probe,
97         .priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
98         .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
99 };