cmd: Add test and fix bugs for dm drivers
[oweals/u-boot.git] / drivers / mmc / rockchip_sdhci.c
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/err.h>
12 #include <linux/libfdt.h>
13 #include <malloc.h>
14 #include <mapmem.h>
15 #include <sdhci.h>
16 #include <clk.h>
17
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 #if CONFIG_IS_ENABLED(OF_PLATDATA)
23         struct dtd_rockchip_rk3399_sdhci_5_1 dtplat;
24 #endif
25         struct mmc_config cfg;
26         struct mmc mmc;
27 };
28
29 struct rockchip_sdhc {
30         struct sdhci_host host;
31         void *base;
32 };
33
34 static int arasan_sdhci_probe(struct udevice *dev)
35 {
36         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
37         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
38         struct rockchip_sdhc *prv = dev_get_priv(dev);
39         struct sdhci_host *host = &prv->host;
40         int max_frequency, ret;
41         struct clk clk;
42
43 #if CONFIG_IS_ENABLED(OF_PLATDATA)
44         struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat;
45
46         host->name = dev->name;
47         host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
48         max_frequency = dtplat->max_frequency;
49         ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
50 #else
51         max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
52         ret = clk_get_by_index(dev, 0, &clk);
53 #endif
54         if (!ret) {
55                 ret = clk_set_rate(&clk, max_frequency);
56                 if (IS_ERR_VALUE(ret))
57                         printf("%s clk set rate fail!\n", __func__);
58         } else {
59                 printf("%s fail to get clk\n", __func__);
60         }
61
62         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
63         host->max_clk = max_frequency;
64         /*
65          * The sdhci-driver only supports 4bit and 8bit, as sdhci_setup_cfg
66          * doesn't allow us to clear MMC_MODE_4BIT.  Consequently, we don't
67          * check for other bus-width values.
68          */
69         if (host->bus_width == 8)
70                 host->host_caps |= MMC_MODE_8BIT;
71
72         host->mmc = &plat->mmc;
73         host->mmc->priv = &prv->host;
74         host->mmc->dev = dev;
75         upriv->mmc = host->mmc;
76
77         ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
78         if (ret)
79                 return ret;
80
81         return sdhci_probe(dev);
82 }
83
84 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
85 {
86 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
87         struct sdhci_host *host = dev_get_priv(dev);
88
89         host->name = dev->name;
90         host->ioaddr = dev_read_addr_ptr(dev);
91         host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
92 #endif
93
94         return 0;
95 }
96
97 static int rockchip_sdhci_bind(struct udevice *dev)
98 {
99         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
100
101         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
102 }
103
104 static const struct udevice_id arasan_sdhci_ids[] = {
105         { .compatible = "arasan,sdhci-5.1" },
106         { }
107 };
108
109 U_BOOT_DRIVER(arasan_sdhci_drv) = {
110         .name           = "rockchip_rk3399_sdhci_5_1",
111         .id             = UCLASS_MMC,
112         .of_match       = arasan_sdhci_ids,
113         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
114         .ops            = &sdhci_ops,
115         .bind           = rockchip_sdhci_bind,
116         .probe          = arasan_sdhci_probe,
117         .priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
118         .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
119 };