Commit | Line | Data |
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42a2c214 DW |
1 | /* linux/arch/arm/mach-msm/board-trout-mmc.c |
2 | ** Author: Brian Swetland <swetland@google.com> | |
3 | */ | |
4 | ||
5 | #include <linux/kernel.h> | |
6 | #include <linux/init.h> | |
7 | #include <linux/platform_device.h> | |
8 | #include <linux/delay.h> | |
9 | #include <linux/mmc/host.h> | |
10 | #include <linux/mmc/sdio_ids.h> | |
11 | #include <linux/err.h> | |
12 | #include <linux/debugfs.h> | |
13 | ||
14 | #include <asm/gpio.h> | |
15 | #include <asm/io.h> | |
16 | ||
17 | #include <mach/vreg.h> | |
18 | ||
19 | #include <mach/mmc.h> | |
20 | ||
21 | #include "devices.h" | |
22 | ||
23 | #include "board-trout.h" | |
24 | ||
25 | #include "proc_comm.h" | |
26 | ||
27 | #define DEBUG_SDSLOT_VDD 1 | |
28 | ||
42a2c214 DW |
29 | /* ---- COMMON ---- */ |
30 | static void config_gpio_table(uint32_t *table, int len) | |
31 | { | |
32 | int n; | |
33 | unsigned id; | |
34 | for(n = 0; n < len; n++) { | |
35 | id = table[n]; | |
36 | msm_proc_comm(PCOM_RPC_GPIO_TLMM_CONFIG_EX, &id, 0); | |
37 | } | |
38 | } | |
39 | ||
40 | /* ---- SDCARD ---- */ | |
41 | ||
42 | static uint32_t sdcard_on_gpio_table[] = { | |
43 | PCOM_GPIO_CFG(62, 2, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_8MA), /* CLK */ | |
44 | PCOM_GPIO_CFG(63, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* CMD */ | |
45 | PCOM_GPIO_CFG(64, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT3 */ | |
46 | PCOM_GPIO_CFG(65, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_8MA), /* DAT2 */ | |
47 | PCOM_GPIO_CFG(66, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT1 */ | |
48 | PCOM_GPIO_CFG(67, 2, GPIO_OUTPUT, GPIO_PULL_UP, GPIO_4MA), /* DAT0 */ | |
49 | }; | |
50 | ||
51 | static uint32_t sdcard_off_gpio_table[] = { | |
52 | PCOM_GPIO_CFG(62, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CLK */ | |
53 | PCOM_GPIO_CFG(63, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* CMD */ | |
54 | PCOM_GPIO_CFG(64, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT3 */ | |
55 | PCOM_GPIO_CFG(65, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT2 */ | |
56 | PCOM_GPIO_CFG(66, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT1 */ | |
57 | PCOM_GPIO_CFG(67, 0, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_4MA), /* DAT0 */ | |
58 | }; | |
59 | ||
60 | static uint opt_disable_sdcard; | |
61 | ||
62 | static int __init trout_disablesdcard_setup(char *str) | |
63 | { | |
64 | int cal = simple_strtol(str, NULL, 0); | |
65 | ||
66 | opt_disable_sdcard = cal; | |
67 | return 1; | |
68 | } | |
69 | ||
70 | __setup("board_trout.disable_sdcard=", trout_disablesdcard_setup); | |
71 | ||
72 | static struct vreg *vreg_sdslot; /* SD slot power */ | |
73 | ||
74 | struct mmc_vdd_xlat { | |
75 | int mask; | |
76 | int level; | |
77 | }; | |
78 | ||
79 | static struct mmc_vdd_xlat mmc_vdd_table[] = { | |
80 | { MMC_VDD_165_195, 1800 }, | |
81 | { MMC_VDD_20_21, 2050 }, | |
82 | { MMC_VDD_21_22, 2150 }, | |
83 | { MMC_VDD_22_23, 2250 }, | |
84 | { MMC_VDD_23_24, 2350 }, | |
85 | { MMC_VDD_24_25, 2450 }, | |
86 | { MMC_VDD_25_26, 2550 }, | |
87 | { MMC_VDD_26_27, 2650 }, | |
88 | { MMC_VDD_27_28, 2750 }, | |
89 | { MMC_VDD_28_29, 2850 }, | |
90 | { MMC_VDD_29_30, 2950 }, | |
91 | }; | |
92 | ||
93 | static unsigned int sdslot_vdd = 0xffffffff; | |
94 | static unsigned int sdslot_vreg_enabled; | |
95 | ||
96 | static uint32_t trout_sdslot_switchvdd(struct device *dev, unsigned int vdd) | |
97 | { | |
98 | int i, rc; | |
99 | ||
100 | BUG_ON(!vreg_sdslot); | |
101 | ||
102 | if (vdd == sdslot_vdd) | |
103 | return 0; | |
104 | ||
105 | sdslot_vdd = vdd; | |
106 | ||
107 | if (vdd == 0) { | |
108 | #if DEBUG_SDSLOT_VDD | |
109 | printk("%s: Disabling SD slot power\n", __func__); | |
110 | #endif | |
111 | config_gpio_table(sdcard_off_gpio_table, | |
112 | ARRAY_SIZE(sdcard_off_gpio_table)); | |
113 | vreg_disable(vreg_sdslot); | |
114 | sdslot_vreg_enabled = 0; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | if (!sdslot_vreg_enabled) { | |
119 | rc = vreg_enable(vreg_sdslot); | |
120 | if (rc) { | |
121 | printk(KERN_ERR "%s: Error enabling vreg (%d)\n", | |
122 | __func__, rc); | |
123 | } | |
124 | config_gpio_table(sdcard_on_gpio_table, | |
125 | ARRAY_SIZE(sdcard_on_gpio_table)); | |
126 | sdslot_vreg_enabled = 1; | |
127 | } | |
128 | ||
129 | for (i = 0; i < ARRAY_SIZE(mmc_vdd_table); i++) { | |
130 | if (mmc_vdd_table[i].mask == (1 << vdd)) { | |
131 | #if DEBUG_SDSLOT_VDD | |
132 | printk("%s: Setting level to %u\n", | |
133 | __func__, mmc_vdd_table[i].level); | |
134 | #endif | |
135 | rc = vreg_set_level(vreg_sdslot, | |
136 | mmc_vdd_table[i].level); | |
137 | if (rc) { | |
138 | printk(KERN_ERR | |
139 | "%s: Error setting vreg level (%d)\n", | |
140 | __func__, rc); | |
141 | } | |
142 | return 0; | |
143 | } | |
144 | } | |
145 | ||
146 | printk(KERN_ERR "%s: Invalid VDD %d specified\n", __func__, vdd); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static unsigned int trout_sdslot_status(struct device *dev) | |
151 | { | |
152 | unsigned int status; | |
153 | ||
154 | status = (unsigned int) gpio_get_value(TROUT_GPIO_SDMC_CD_N); | |
155 | return (!status); | |
156 | } | |
157 | ||
158 | #define TROUT_MMC_VDD MMC_VDD_165_195 | MMC_VDD_20_21 | MMC_VDD_21_22 \ | |
159 | | MMC_VDD_22_23 | MMC_VDD_23_24 | MMC_VDD_24_25 \ | |
160 | | MMC_VDD_25_26 | MMC_VDD_26_27 | MMC_VDD_27_28 \ | |
161 | | MMC_VDD_28_29 | MMC_VDD_29_30 | |
162 | ||
b5d643de | 163 | static struct msm_mmc_platform_data trout_sdslot_data = { |
42a2c214 DW |
164 | .ocr_mask = TROUT_MMC_VDD, |
165 | .status = trout_sdslot_status, | |
166 | .translate_vdd = trout_sdslot_switchvdd, | |
167 | }; | |
168 | ||
169 | int __init trout_init_mmc(unsigned int sys_rev) | |
170 | { | |
171 | sdslot_vreg_enabled = 0; | |
172 | ||
173 | vreg_sdslot = vreg_get(0, "gp6"); | |
174 | if (IS_ERR(vreg_sdslot)) | |
175 | return PTR_ERR(vreg_sdslot); | |
176 | ||
177 | set_irq_wake(TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 1); | |
178 | ||
179 | if (!opt_disable_sdcard) | |
180 | msm_add_sdcc(2, &trout_sdslot_data, | |
181 | TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 0); | |
182 | else | |
183 | printk(KERN_INFO "trout: SD-Card interface disabled\n"); | |
184 | return 0; | |
185 | } | |
186 |