Merge git://git.denx.de/u-boot-marvell
[platform/kernel/u-boot.git] / 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 <dt-structs.h>
12 #include <linux/libfdt.h>
13 #include <malloc.h>
14 #include <mapmem.h>
15 #include <sdhci.h>
16 #include <clk.h>
17
18 DECLARE_GLOBAL_DATA_PTR;
19 /* 400KHz is max freq for card ID etc. Use that as min */
20 #define EMMC_MIN_FREQ   400000
21
22 struct rockchip_sdhc_plat {
23 #if CONFIG_IS_ENABLED(OF_PLATDATA)
24         struct dtd_rockchip_rk3399_sdhci_5_1 dtplat;
25 #endif
26         struct mmc_config cfg;
27         struct mmc mmc;
28 };
29
30 struct rockchip_sdhc {
31         struct sdhci_host host;
32         void *base;
33 };
34
35 static int arasan_sdhci_probe(struct udevice *dev)
36 {
37         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
38         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
39         struct rockchip_sdhc *prv = dev_get_priv(dev);
40         struct sdhci_host *host = &prv->host;
41         int max_frequency, ret;
42         struct clk clk;
43
44 #if CONFIG_IS_ENABLED(OF_PLATDATA)
45         struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat;
46
47         host->name = dev->name;
48         host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
49         max_frequency = dtplat->max_frequency;
50         ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
51 #else
52         max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
53         ret = clk_get_by_index(dev, 0, &clk);
54 #endif
55         if (!ret) {
56                 ret = clk_set_rate(&clk, max_frequency);
57                 if (IS_ERR_VALUE(ret))
58                         printf("%s clk set rate fail!\n", __func__);
59         } else {
60                 printf("%s fail to get clk\n", __func__);
61         }
62
63         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
64         host->max_clk = max_frequency;
65         /*
66          * The sdhci-driver only supports 4bit and 8bit, as sdhci_setup_cfg
67          * doesn't allow us to clear MMC_MODE_4BIT.  Consequently, we don't
68          * check for other bus-width values.
69          */
70         if (host->bus_width == 8)
71                 host->host_caps |= MMC_MODE_8BIT;
72
73         ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
74
75         host->mmc = &plat->mmc;
76         if (ret)
77                 return ret;
78         host->mmc->priv = &prv->host;
79         host->mmc->dev = dev;
80         upriv->mmc = host->mmc;
81
82         return sdhci_probe(dev);
83 }
84
85 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
86 {
87 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
88         struct sdhci_host *host = dev_get_priv(dev);
89
90         host->name = dev->name;
91         host->ioaddr = dev_read_addr_ptr(dev);
92         host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
93 #endif
94
95         return 0;
96 }
97
98 static int rockchip_sdhci_bind(struct udevice *dev)
99 {
100         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
101
102         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
103 }
104
105 static const struct udevice_id arasan_sdhci_ids[] = {
106         { .compatible = "arasan,sdhci-5.1" },
107         { }
108 };
109
110 U_BOOT_DRIVER(arasan_sdhci_drv) = {
111         .name           = "rockchip_rk3399_sdhci_5_1",
112         .id             = UCLASS_MMC,
113         .of_match       = arasan_sdhci_ids,
114         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
115         .ops            = &sdhci_ops,
116         .bind           = rockchip_sdhci_bind,
117         .probe          = arasan_sdhci_probe,
118         .priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
119         .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
120 };