1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@samsung.com>
*/
#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <sdhci.h>
#include <fdtdec.h>
#include <linux/libfdt.h>
#include <asm/gpio.h>
#include <asm/arch/mmc.h>
#include <asm/arch/clk.h>
#include <errno.h>
#include <asm/arch/pinmux.h>
#ifdef CONFIG_DM_MMC
struct s5p_sdhci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
DECLARE_GLOBAL_DATA_PTR;
#endif
static char *S5P_NAME = "SAMSUNG SDHCI";
static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
{
unsigned long val, ctrl;
/*
* SELCLKPADDS[17:16]
* 00 = 2mA
* 01 = 4mA
* 10 = 7mA
* 11 = 9mA
*/
sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
val = sdhci_readl(host, SDHCI_CONTROL2);
val &= SDHCI_CTRL2_SELBASECLK_MASK(3);
val |= SDHCI_CTRL2_ENSTAASYNCCLR |
SDHCI_CTRL2_ENCMDCNFMSK |
SDHCI_CTRL2_ENFBCLKRX |
SDHCI_CTRL2_ENCLKOUTHOLD;
sdhci_writel(host, val, SDHCI_CONTROL2);
/*
* FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
* FCSel[1:0] : Rx Feedback Clock Delay Control
* Inverter delay means10ns delay if SDCLK 50MHz setting
* 01 = Delay1 (basic delay)
* 11 = Delay2 (basic delay + 2ns)
* 00 = Delay3 (inverter delay)
* 10 = Delay4 (inverter delay + 2ns)
*/
val = SDHCI_CTRL3_FCSEL0 | SDHCI_CTRL3_FCSEL1;
sdhci_writel(host, val, SDHCI_CONTROL3);
/*
* SELBASECLK[5:4]
* 00/01 = HCLK
* 10 = EPLL
* 11 = XTI or XEXTCLK
*/
ctrl = sdhci_readl(host, SDHCI_CONTROL2);
ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
sdhci_writel(host, ctrl, SDHCI_CONTROL2);
}
static void s5p_set_clock(struct sdhci_host *host, u32 div)
{
/* ToDo : Use the Clock Framework */
set_mmc_clk(host->index, div);
}
static const struct sdhci_ops s5p_sdhci_ops = {
.set_clock = &s5p_set_clock,
.set_control_reg = &s5p_sdhci_set_control_reg,
};
static int s5p_sdhci_core_init(struct sdhci_host *host)
{
host->name = S5P_NAME;
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_USE_WIDE8;
host->max_clk = 52000000;
host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
host->ops = &s5p_sdhci_ops;
if (host->bus_width == 8)
host->host_caps |= MMC_MODE_8BIT;
#ifndef CONFIG_BLK
return add_sdhci(host, 0, 400000);
#else
return 0;
#endif
}
int s5p_sdhci_init(u32 regbase, int index, int bus_width)
{
struct sdhci_host *host = calloc(1, sizeof(struct sdhci_host));
if (!host) {
printf("sdhci__host allocation fail!\n");
return -ENOMEM;
}
host->ioaddr = (void *)regbase;
host->index = index;
host->bus_width = bus_width;
return s5p_sdhci_core_init(host);
}
static int do_sdhci_init(struct sdhci_host *host)
{
int dev_id, flag, ret;
flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
dev_id = host->index + PERIPH_ID_SDMMC0;
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
printf("external SD not configured\n");
return ret;
}
if (dm_gpio_is_valid(&host->pwr_gpio)) {
dm_gpio_set_value(&host->pwr_gpio, 1);
ret = exynos_pinmux_config(dev_id, flag);
if (ret) {
debug("MMC not configured\n");
return ret;
}
}
if (dm_gpio_is_valid(&host->cd_gpio)) {
ret = dm_gpio_get_value(&host->cd_gpio);
if (ret) {
debug("no SD card detected (%d)\n", ret);
return -ENODEV;
}
}
return s5p_sdhci_core_init(host);
}
static int sdhci_get_config(const void *blob, int node, struct sdhci_host *host)
{
int bus_width, dev_id;
unsigned int base;
/* Get device id */
dev_id = pinmux_decode_periph_id(blob, node);
if (dev_id < PERIPH_ID_SDMMC0 || dev_id > PERIPH_ID_SDMMC3) {
debug("MMC: Can't get device id\n");
return -EINVAL;
}
host->index = dev_id - PERIPH_ID_SDMMC0;
/* Get bus width */
bus_width = fdtdec_get_int(blob, node, "samsung,bus-width", 0);
if (bus_width <= 0) {
debug("MMC: Can't get bus-width\n");
return -EINVAL;
}
host->bus_width = bus_width;
/* Get the base address from the device node */
base = fdtdec_get_addr(blob, node, "reg");
if (!base) {
debug("MMC: Can't get base address\n");
return -EINVAL;
}
host->ioaddr = (void *)base;
gpio_request_by_name_nodev(offset_to_ofnode(node), "pwr-gpios", 0,
&host->pwr_gpio, GPIOD_IS_OUT);
gpio_request_by_name_nodev(offset_to_ofnode(node), "cd-gpios", 0,
&host->cd_gpio, GPIOD_IS_IN);
return 0;
}
#ifdef CONFIG_DM_MMC
static int s5p_sdhci_probe(struct udevice *dev)
{
struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct sdhci_host *host = dev_get_priv(dev);
int ret;
ret = sdhci_get_config(gd->fdt_blob, dev_of_offset(dev), host);
if (ret)
return ret;
ret = do_sdhci_init(host);
if (ret)
return ret;
host->mmc = &plat->mmc;
host->mmc->dev = dev;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 400000);
if (ret)
return ret;
host->mmc->priv = host;
upriv->mmc = host->mmc;
return sdhci_probe(dev);
}
static int s5p_sdhci_bind(struct udevice *dev)
{
struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
int ret;
ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
if (ret)
return ret;
return 0;
}
static const struct udevice_id s5p_sdhci_ids[] = {
{ .compatible = "samsung,exynos4412-sdhci"},
{ }
};
U_BOOT_DRIVER(s5p_sdhci_drv) = {
.name = "s5p_sdhci",
.id = UCLASS_MMC,
.of_match = s5p_sdhci_ids,
.bind = s5p_sdhci_bind,
.ops = &sdhci_ops,
.probe = s5p_sdhci_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
.platdata_auto_alloc_size = sizeof(struct s5p_sdhci_plat),
};
#endif /* CONFIG_DM_MMC */
|
