2 * (C) Copyright 2012 SAMSUNG Electronics
3 * Jaehoon Chung <jh80.chung@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
14 #include <asm/arch/mmc.h>
15 #include <asm/arch/clk.h>
17 #include <asm/arch/pinmux.h>
19 static char *S5P_NAME
= "SAMSUNG SDHCI";
20 static void s5p_sdhci_set_control_reg(struct sdhci_host
*host
)
22 unsigned long val
, ctrl
;
30 sdhci_writel(host
, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4
);
32 val
= sdhci_readl(host
, SDHCI_CONTROL2
);
33 val
&= SDHCI_CTRL2_SELBASECLK_MASK(3);
35 val
|= SDHCI_CTRL2_ENSTAASYNCCLR
|
36 SDHCI_CTRL2_ENCMDCNFMSK
|
37 SDHCI_CTRL2_ENFBCLKRX
|
38 SDHCI_CTRL2_ENCLKOUTHOLD
;
40 sdhci_writel(host
, val
, SDHCI_CONTROL2
);
43 * FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
44 * FCSel[1:0] : Rx Feedback Clock Delay Control
45 * Inverter delay means10ns delay if SDCLK 50MHz setting
46 * 01 = Delay1 (basic delay)
47 * 11 = Delay2 (basic delay + 2ns)
48 * 00 = Delay3 (inverter delay)
49 * 10 = Delay4 (inverter delay + 2ns)
51 val
= SDHCI_CTRL3_FCSEL0
| SDHCI_CTRL3_FCSEL1
;
52 sdhci_writel(host
, val
, SDHCI_CONTROL3
);
60 ctrl
= sdhci_readl(host
, SDHCI_CONTROL2
);
61 ctrl
&= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
62 ctrl
|= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
63 sdhci_writel(host
, ctrl
, SDHCI_CONTROL2
);
66 static int s5p_sdhci_core_init(struct sdhci_host
*host
)
68 host
->name
= S5P_NAME
;
70 host
->quirks
= SDHCI_QUIRK_NO_HISPD_BIT
| SDHCI_QUIRK_BROKEN_VOLTAGE
|
71 SDHCI_QUIRK_BROKEN_R1B
| SDHCI_QUIRK_32BIT_DMA_ADDR
|
72 SDHCI_QUIRK_WAIT_SEND_CMD
| SDHCI_QUIRK_USE_WIDE8
;
73 host
->voltages
= MMC_VDD_32_33
| MMC_VDD_33_34
| MMC_VDD_165_195
;
74 host
->version
= sdhci_readw(host
, SDHCI_HOST_VERSION
);
76 host
->set_control_reg
= &s5p_sdhci_set_control_reg
;
77 host
->set_clock
= set_mmc_clk
;
79 if (host
->bus_width
== 8)
80 host
->host_caps
|= MMC_MODE_8BIT
;
82 return add_sdhci(host
, 52000000, 400000);
85 int s5p_sdhci_init(u32 regbase
, int index
, int bus_width
)
87 struct sdhci_host
*host
= calloc(1, sizeof(struct sdhci_host
));
89 printf("sdhci__host allocation fail!\n");
92 host
->ioaddr
= (void *)regbase
;
94 host
->bus_width
= bus_width
;
96 return s5p_sdhci_core_init(host
);
99 #if CONFIG_IS_ENABLED(OF_CONTROL)
100 struct sdhci_host sdhci_host
[SDHCI_MAX_HOSTS
];
102 static int do_sdhci_init(struct sdhci_host
*host
)
104 int dev_id
, flag
, ret
;
106 flag
= host
->bus_width
== 8 ? PINMUX_FLAG_8BIT_MODE
: PINMUX_FLAG_NONE
;
107 dev_id
= host
->index
+ PERIPH_ID_SDMMC0
;
109 if (dm_gpio_is_valid(&host
->pwr_gpio
)) {
110 dm_gpio_set_value(&host
->pwr_gpio
, 1);
111 ret
= exynos_pinmux_config(dev_id
, flag
);
113 debug("MMC not configured\n");
118 if (dm_gpio_is_valid(&host
->cd_gpio
)) {
119 ret
= dm_gpio_get_value(&host
->cd_gpio
);
121 debug("no SD card detected (%d)\n", ret
);
125 ret
= exynos_pinmux_config(dev_id
, flag
);
127 printf("external SD not configured\n");
132 return s5p_sdhci_core_init(host
);
135 static int sdhci_get_config(const void *blob
, int node
, struct sdhci_host
*host
)
137 int bus_width
, dev_id
;
141 dev_id
= pinmux_decode_periph_id(blob
, node
);
142 if (dev_id
< PERIPH_ID_SDMMC0
&& dev_id
> PERIPH_ID_SDMMC3
) {
143 debug("MMC: Can't get device id\n");
146 host
->index
= dev_id
- PERIPH_ID_SDMMC0
;
149 bus_width
= fdtdec_get_int(blob
, node
, "samsung,bus-width", 0);
150 if (bus_width
<= 0) {
151 debug("MMC: Can't get bus-width\n");
154 host
->bus_width
= bus_width
;
156 /* Get the base address from the device node */
157 base
= fdtdec_get_addr(blob
, node
, "reg");
159 debug("MMC: Can't get base address\n");
162 host
->ioaddr
= (void *)base
;
164 gpio_request_by_name_nodev(blob
, node
, "pwr-gpios", 0, &host
->pwr_gpio
,
166 gpio_request_by_name_nodev(blob
, node
, "cd-gpios", 0, &host
->cd_gpio
,
172 static int process_nodes(const void *blob
, int node_list
[], int count
)
174 struct sdhci_host
*host
;
178 debug("%s: count = %d\n", __func__
, count
);
180 /* build sdhci_host[] for each controller */
181 for (i
= 0; i
< count
; i
++) {
186 host
= &sdhci_host
[i
];
188 ret
= sdhci_get_config(blob
, node
, host
);
190 printf("%s: failed to decode dev %d (%d)\n", __func__
, i
, ret
);
195 ret
= do_sdhci_init(host
);
197 printf("%s: failed to initialize dev %d (%d)\n", __func__
, i
, ret
);
202 /* we only consider it an error when all nodes fail */
203 return (failed
== count
? -1 : 0);
206 int exynos_mmc_init(const void *blob
)
209 int node_list
[SDHCI_MAX_HOSTS
];
211 count
= fdtdec_find_aliases_for_id(blob
, "mmc",
212 COMPAT_SAMSUNG_EXYNOS_MMC
, node_list
,
215 return process_nodes(blob
, node_list
, count
);