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Daniel Walker42a2c212010-03-30 16:11:57 -07001/* 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
Daniel Walker42a2c212010-03-30 16:11:57 -070029/* ---- COMMON ---- */
30static 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
42static 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
51static 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
60static uint opt_disable_sdcard;
61
62static 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
72static struct vreg *vreg_sdslot; /* SD slot power */
73
74struct mmc_vdd_xlat {
75 int mask;
76 int level;
77};
78
79static 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
93static unsigned int sdslot_vdd = 0xffffffff;
94static unsigned int sdslot_vreg_enabled;
95
96static 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
150static 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
Sahitya Tummalab5d643d2010-07-29 16:55:34 +0530163static struct msm_mmc_platform_data trout_sdslot_data = {
Daniel Walker42a2c212010-03-30 16:11:57 -0700164 .ocr_mask = TROUT_MMC_VDD,
165 .status = trout_sdslot_status,
166 .translate_vdd = trout_sdslot_switchvdd,
167};
168
169int __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
Thomas Gleixner6845664a2011-03-24 13:25:22 +0100177 irq_set_irq_wake(TROUT_GPIO_TO_INT(TROUT_GPIO_SDMC_CD_N), 1);
Daniel Walker42a2c212010-03-30 16:11:57 -0700178
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