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Wenyou Yanga3b59b12015-11-02 10:57:09 +08001/*
2 * Copyright (C) 2015 Atmel Corporation
3 * Wenyou.Yang <wenyou.yang@atmel.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
Wenyou Yanga0d0d862016-08-10 10:51:05 +08009#include <clk.h>
10#include <dm.h>
Wenyou Yanga3b59b12015-11-02 10:57:09 +080011#include <malloc.h>
12#include <sdhci.h>
13#include <asm/arch/clk.h>
14
15#define ATMEL_SDHC_MIN_FREQ 400000
Ludovic Desroches327713a2017-11-17 14:51:27 +080016#define ATMEL_SDHC_GCK_RATE 240000000
Wenyou Yanga3b59b12015-11-02 10:57:09 +080017
Wenyou Yanga0d0d862016-08-10 10:51:05 +080018#ifndef CONFIG_DM_MMC
Wenyou Yanga3b59b12015-11-02 10:57:09 +080019int atmel_sdhci_init(void *regbase, u32 id)
20{
21 struct sdhci_host *host;
22 u32 max_clk, min_clk = ATMEL_SDHC_MIN_FREQ;
23
24 host = (struct sdhci_host *)calloc(1, sizeof(struct sdhci_host));
25 if (!host) {
26 printf("%s: sdhci_host calloc failed\n", __func__);
27 return -ENOMEM;
28 }
29
30 host->name = "atmel_sdhci";
31 host->ioaddr = regbase;
Wenyou Yangb3125082017-05-11 08:25:12 +080032 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
Wenyou Yanga3b59b12015-11-02 10:57:09 +080033 max_clk = at91_get_periph_generated_clk(id);
34 if (!max_clk) {
35 printf("%s: Failed to get the proper clock\n", __func__);
36 free(host);
37 return -ENODEV;
38 }
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010039 host->max_clk = max_clk;
Wenyou Yanga3b59b12015-11-02 10:57:09 +080040
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010041 add_sdhci(host, 0, min_clk);
Wenyou Yanga3b59b12015-11-02 10:57:09 +080042
43 return 0;
44}
Wenyou Yanga0d0d862016-08-10 10:51:05 +080045
46#else
47
48DECLARE_GLOBAL_DATA_PTR;
49
50struct atmel_sdhci_plat {
51 struct mmc_config cfg;
52 struct mmc mmc;
53};
54
Wenyou Yanga0d0d862016-08-10 10:51:05 +080055static int atmel_sdhci_probe(struct udevice *dev)
56{
57 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
58 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
59 struct sdhci_host *host = dev_get_priv(dev);
60 u32 max_clk;
Wenyou Yanga0d0d862016-08-10 10:51:05 +080061 struct clk clk;
62 int ret;
63
Wenyou Yang339cb072016-09-27 11:00:34 +080064 ret = clk_get_by_index(dev, 0, &clk);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080065 if (ret)
66 return ret;
67
68 ret = clk_enable(&clk);
69 if (ret)
70 return ret;
71
72 host->name = dev->name;
Simon Glassa821c4a2017-05-17 17:18:05 -060073 host->ioaddr = (void *)devfdt_get_addr(dev);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080074
Wenyou Yangb3125082017-05-11 08:25:12 +080075 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
Simon Glasse160f7d2017-01-17 16:52:55 -070076 host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
Wenyou Yanga0d0d862016-08-10 10:51:05 +080077 "bus-width", 4);
78
Wenyou Yang339cb072016-09-27 11:00:34 +080079 ret = clk_get_by_index(dev, 1, &clk);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080080 if (ret)
81 return ret;
82
Ludovic Desroches327713a2017-11-17 14:51:27 +080083 ret = clk_set_rate(&clk, ATMEL_SDHC_GCK_RATE);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080084 if (ret)
85 return ret;
86
87 max_clk = clk_get_rate(&clk);
88 if (!max_clk)
89 return -EINVAL;
90
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010091 host->max_clk = max_clk;
92
93 ret = sdhci_setup_cfg(&plat->cfg, host, 0, ATMEL_SDHC_MIN_FREQ);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080094 if (ret)
95 return ret;
96
97 host->mmc = &plat->mmc;
98 host->mmc->dev = dev;
99 host->mmc->priv = host;
100 upriv->mmc = host->mmc;
101
102 clk_free(&clk);
103
104 return sdhci_probe(dev);
105}
106
107static int atmel_sdhci_bind(struct udevice *dev)
108{
109 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
Wenyou Yanga0d0d862016-08-10 10:51:05 +0800110
Masahiro Yamada24f5aec2016-09-06 22:17:32 +0900111 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
Wenyou Yanga0d0d862016-08-10 10:51:05 +0800112}
113
114static const struct udevice_id atmel_sdhci_ids[] = {
115 { .compatible = "atmel,sama5d2-sdhci" },
116 { }
117};
118
119U_BOOT_DRIVER(atmel_sdhci_drv) = {
120 .name = "atmel_sdhci",
121 .id = UCLASS_MMC,
122 .of_match = atmel_sdhci_ids,
123 .ops = &sdhci_ops,
124 .bind = atmel_sdhci_bind,
125 .probe = atmel_sdhci_probe,
126 .priv_auto_alloc_size = sizeof(struct sdhci_host),
127 .platdata_auto_alloc_size = sizeof(struct atmel_sdhci_plat),
128};
129#endif