2 * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
4 * Rockchip SD Host Controller Interface
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <dt-structs.h>
18 DECLARE_GLOBAL_DATA_PTR
;
19 /* 400KHz is max freq for card ID etc. Use that as min */
20 #define EMMC_MIN_FREQ 400000
22 struct rockchip_sdhc_plat
{
23 #if CONFIG_IS_ENABLED(OF_PLATDATA)
24 struct dtd_rockchip_rk3399_sdhci_5_1 dtplat
;
26 struct mmc_config cfg
;
30 struct rockchip_sdhc
{
31 struct sdhci_host host
;
35 static int arasan_sdhci_probe(struct udevice
*dev
)
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
;
44 #if CONFIG_IS_ENABLED(OF_PLATDATA)
45 struct dtd_rockchip_rk3399_sdhci_5_1
*dtplat
= &plat
->dtplat
;
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
);
52 max_frequency
= dev_read_u32_default(dev
, "max-frequency", 0);
53 ret
= clk_get_by_index(dev
, 0, &clk
);
56 ret
= clk_set_rate(&clk
, max_frequency
);
57 if (IS_ERR_VALUE(ret
))
58 printf("%s clk set rate fail!\n", __func__
);
60 printf("%s fail to get clk\n", __func__
);
63 host
->quirks
= SDHCI_QUIRK_WAIT_SEND_CMD
;
64 host
->max_clk
= max_frequency
;
66 ret
= sdhci_setup_cfg(&plat
->cfg
, host
, 0, EMMC_MIN_FREQ
);
68 host
->mmc
= &plat
->mmc
;
71 host
->mmc
->priv
= &prv
->host
;
73 upriv
->mmc
= host
->mmc
;
75 return sdhci_probe(dev
);
78 static int arasan_sdhci_ofdata_to_platdata(struct udevice
*dev
)
80 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
81 struct sdhci_host
*host
= dev_get_priv(dev
);
83 host
->name
= dev
->name
;
84 host
->ioaddr
= dev_read_addr_ptr(dev
);
90 static int rockchip_sdhci_bind(struct udevice
*dev
)
92 struct rockchip_sdhc_plat
*plat
= dev_get_platdata(dev
);
94 return sdhci_bind(dev
, &plat
->mmc
, &plat
->cfg
);
97 static const struct udevice_id arasan_sdhci_ids
[] = {
98 { .compatible
= "arasan,sdhci-5.1" },
102 U_BOOT_DRIVER(arasan_sdhci_drv
) = {
103 .name
= "rockchip_rk3399_sdhci_5_1",
105 .of_match
= arasan_sdhci_ids
,
106 .ofdata_to_platdata
= arasan_sdhci_ofdata_to_platdata
,
108 .bind
= rockchip_sdhci_bind
,
109 .probe
= arasan_sdhci_probe
,
110 .priv_auto_alloc_size
= sizeof(struct rockchip_sdhc
),
111 .platdata_auto_alloc_size
= sizeof(struct rockchip_sdhc_plat
),