diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-14 16:42:43 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-14 16:42:43 -0400 |
commit | 2cf4d4514d5b43c1f3b64bd0ec8b9853bde8f1dc (patch) | |
tree | e35a625496acc6ac852846d40b8851186b9d1ac4 /arch/arm/mach-u300/mmc.c | |
parent | 44b7532b8b464f606053562400719c9c21276037 (diff) | |
parent | ce53895a5d24e0ee19fb92f56c17323fb4c9ab27 (diff) |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (417 commits)
MAINTAINERS: EB110ATX is not ebsa110
MAINTAINERS: update Eric Miao's email address and status
fb: add support of LCD display controller on pxa168/910 (base layer)
[ARM] 5552/1: ep93xx get_uart_rate(): use EP93XX_SYSCON_PWRCNT and EP93XX_SYSCON_PWRCN
[ARM] pxa/sharpsl_pm: zaurus needs generic pxa suspend/resume routines
[ARM] 5544/1: Trust PrimeCell resource sizes
[ARM] pxa/sharpsl_pm: cleanup of gpio-related code.
[ARM] pxa/sharpsl_pm: drop set_irq_type calls
[ARM] pxa/sharpsl_pm: merge pxa-specific code into generic one
[ARM] pxa/sharpsl_pm: merge the two sharpsl_pm.c since it's now pxa specific
[ARM] sa1100: remove unused collie_pm.c
[ARM] pxa: fix the conflicting non-static declarations of global_gpios[]
[ARM] 5550/1: Add default configure file for w90p910 platform
[ARM] 5549/1: Add clock api for w90p910 platform.
[ARM] 5548/1: Add gpio api for w90p910 platform
[ARM] 5551/1: Add multi-function pin api for w90p910 platform.
[ARM] Make ARM_VIC_NR depend on ARM_VIC
[ARM] 5546/1: ARM PL022 SSP/SPI driver v3
ARM: OMAP4: SMP: Update defconfig for OMAP4430
ARM: OMAP4: SMP: Enable SMP support for OMAP4430
...
Diffstat (limited to 'arch/arm/mach-u300/mmc.c')
-rw-r--r-- | arch/arm/mach-u300/mmc.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/arch/arm/mach-u300/mmc.c b/arch/arm/mach-u300/mmc.c new file mode 100644 index 000000000000..3138d3955c9e --- /dev/null +++ b/arch/arm/mach-u300/mmc.c | |||
@@ -0,0 +1,216 @@ | |||
1 | /* | ||
2 | * | ||
3 | * arch/arm/mach-u300/mmc.c | ||
4 | * | ||
5 | * | ||
6 | * Copyright (C) 2009 ST-Ericsson AB | ||
7 | * License terms: GNU General Public License (GPL) version 2 | ||
8 | * | ||
9 | * Author: Linus Walleij <linus.walleij@stericsson.com> | ||
10 | * Author: Johan Lundin <johan.lundin@stericsson.com> | ||
11 | * Author: Jonas Aaberg <jonas.aberg@stericsson.com> | ||
12 | */ | ||
13 | #include <linux/device.h> | ||
14 | #include <linux/amba/bus.h> | ||
15 | #include <linux/mmc/host.h> | ||
16 | #include <linux/input.h> | ||
17 | #include <linux/workqueue.h> | ||
18 | #include <linux/delay.h> | ||
19 | #include <linux/regulator/consumer.h> | ||
20 | #include <linux/regulator/machine.h> | ||
21 | #include <linux/gpio.h> | ||
22 | |||
23 | #include <asm/mach/mmc.h> | ||
24 | #include "mmc.h" | ||
25 | |||
26 | struct mmci_card_event { | ||
27 | struct input_dev *mmc_input; | ||
28 | int mmc_inserted; | ||
29 | struct work_struct workq; | ||
30 | struct mmc_platform_data mmc0_plat_data; | ||
31 | }; | ||
32 | |||
33 | static unsigned int mmc_status(struct device *dev) | ||
34 | { | ||
35 | struct mmci_card_event *mmci_card = container_of( | ||
36 | dev->platform_data, | ||
37 | struct mmci_card_event, mmc0_plat_data); | ||
38 | |||
39 | return mmci_card->mmc_inserted; | ||
40 | } | ||
41 | |||
42 | /* | ||
43 | * Here follows a large chunk of code which will only be enabled if you | ||
44 | * have both the AB3100 chip mounted and the MMC subsystem activated. | ||
45 | */ | ||
46 | |||
47 | static u32 mmc_translate_vdd(struct device *dev, unsigned int voltage) | ||
48 | { | ||
49 | int v; | ||
50 | |||
51 | /* | ||
52 | * MMC Spec: | ||
53 | * bit 7: 1.70 - 1.95V | ||
54 | * bit 8 - 14: 2.0 - 2.6V | ||
55 | * bit 15 - 23: 2.7 - 3.6V | ||
56 | * | ||
57 | * ab3100 voltages: | ||
58 | * 000 - 2.85V | ||
59 | * 001 - 2.75V | ||
60 | * 010 - 1.8V | ||
61 | * 011 - 1.5V | ||
62 | */ | ||
63 | switch (voltage) { | ||
64 | case 8: | ||
65 | v = 3; | ||
66 | break; | ||
67 | case 9: | ||
68 | case 10: | ||
69 | case 11: | ||
70 | case 12: | ||
71 | case 13: | ||
72 | case 14: | ||
73 | case 15: | ||
74 | v = 1; | ||
75 | break; | ||
76 | case 16: | ||
77 | v = 1; | ||
78 | break; | ||
79 | case 17: | ||
80 | case 18: | ||
81 | case 19: | ||
82 | case 20: | ||
83 | case 21: | ||
84 | case 22: | ||
85 | case 23: | ||
86 | case 24: | ||
87 | v = 0; | ||
88 | break; | ||
89 | default: | ||
90 | v = 0; | ||
91 | break; | ||
92 | } | ||
93 | |||
94 | /* PL180 voltage register bits */ | ||
95 | return v << 2; | ||
96 | } | ||
97 | |||
98 | |||
99 | |||
100 | static int mmci_callback(void *data) | ||
101 | { | ||
102 | struct mmci_card_event *mmci_card = data; | ||
103 | |||
104 | disable_irq_on_gpio_pin(U300_GPIO_PIN_MMC_CD); | ||
105 | schedule_work(&mmci_card->workq); | ||
106 | |||
107 | return 0; | ||
108 | } | ||
109 | |||
110 | |||
111 | static ssize_t gpio_show(struct device *dev, struct device_attribute *attr, | ||
112 | char *buf) | ||
113 | { | ||
114 | struct mmci_card_event *mmci_card = container_of( | ||
115 | dev->platform_data, | ||
116 | struct mmci_card_event, mmc0_plat_data); | ||
117 | |||
118 | |||
119 | return sprintf(buf, "%d\n", !mmci_card->mmc_inserted); | ||
120 | } | ||
121 | |||
122 | static DEVICE_ATTR(mmc_inserted, S_IRUGO, gpio_show, NULL); | ||
123 | |||
124 | static void _mmci_callback(struct work_struct *ws) | ||
125 | { | ||
126 | |||
127 | struct mmci_card_event *mmci_card = container_of( | ||
128 | ws, | ||
129 | struct mmci_card_event, workq); | ||
130 | |||
131 | mdelay(20); | ||
132 | |||
133 | mmci_card->mmc_inserted = !!gpio_get_value(U300_GPIO_PIN_MMC_CD); | ||
134 | |||
135 | input_report_switch(mmci_card->mmc_input, KEY_INSERT, | ||
136 | !mmci_card->mmc_inserted); | ||
137 | input_sync(mmci_card->mmc_input); | ||
138 | |||
139 | pr_debug("MMC/SD card was %s\n", | ||
140 | mmci_card->mmc_inserted ? "removed" : "inserted"); | ||
141 | |||
142 | enable_irq_on_gpio_pin(U300_GPIO_PIN_MMC_CD, !mmci_card->mmc_inserted); | ||
143 | } | ||
144 | |||
145 | int __devinit mmc_init(struct amba_device *adev) | ||
146 | { | ||
147 | struct mmci_card_event *mmci_card; | ||
148 | struct device *mmcsd_device = &adev->dev; | ||
149 | int ret = 0; | ||
150 | |||
151 | mmci_card = kzalloc(sizeof(struct mmci_card_event), GFP_KERNEL); | ||
152 | if (!mmci_card) | ||
153 | return -ENOMEM; | ||
154 | |||
155 | /* Nominally 2.85V on our platform */ | ||
156 | mmci_card->mmc0_plat_data.ocr_mask = MMC_VDD_28_29; | ||
157 | mmci_card->mmc0_plat_data.translate_vdd = mmc_translate_vdd; | ||
158 | mmci_card->mmc0_plat_data.status = mmc_status; | ||
159 | |||
160 | mmcsd_device->platform_data = (void *) &mmci_card->mmc0_plat_data; | ||
161 | |||
162 | INIT_WORK(&mmci_card->workq, _mmci_callback); | ||
163 | |||
164 | ret = gpio_request(U300_GPIO_PIN_MMC_CD, "MMC card detection"); | ||
165 | if (ret) { | ||
166 | printk(KERN_CRIT "Could not allocate MMC card detection " \ | ||
167 | "GPIO pin\n"); | ||
168 | goto out; | ||
169 | } | ||
170 | |||
171 | ret = gpio_direction_input(U300_GPIO_PIN_MMC_CD); | ||
172 | if (ret) { | ||
173 | printk(KERN_CRIT "Invalid GPIO pin requested\n"); | ||
174 | goto out; | ||
175 | } | ||
176 | |||
177 | ret = sysfs_create_file(&mmcsd_device->kobj, | ||
178 | &dev_attr_mmc_inserted.attr); | ||
179 | if (ret) | ||
180 | goto out; | ||
181 | |||
182 | mmci_card->mmc_input = input_allocate_device(); | ||
183 | if (!mmci_card->mmc_input) { | ||
184 | printk(KERN_CRIT "Could not allocate MMC input device\n"); | ||
185 | return -ENOMEM; | ||
186 | } | ||
187 | |||
188 | mmci_card->mmc_input->name = "MMC insert notification"; | ||
189 | mmci_card->mmc_input->id.bustype = BUS_HOST; | ||
190 | mmci_card->mmc_input->id.vendor = 0; | ||
191 | mmci_card->mmc_input->id.product = 0; | ||
192 | mmci_card->mmc_input->id.version = 0x0100; | ||
193 | mmci_card->mmc_input->dev.parent = mmcsd_device; | ||
194 | input_set_capability(mmci_card->mmc_input, EV_SW, KEY_INSERT); | ||
195 | |||
196 | /* | ||
197 | * Since this must always be compiled into the kernel, this input | ||
198 | * is never unregistered or free:ed. | ||
199 | */ | ||
200 | ret = input_register_device(mmci_card->mmc_input); | ||
201 | if (ret) { | ||
202 | input_free_device(mmci_card->mmc_input); | ||
203 | goto out; | ||
204 | } | ||
205 | |||
206 | input_set_drvdata(mmci_card->mmc_input, mmci_card); | ||
207 | |||
208 | ret = gpio_register_callback(U300_GPIO_PIN_MMC_CD, mmci_callback, | ||
209 | mmci_card); | ||
210 | |||
211 | schedule_work(&mmci_card->workq); | ||
212 | |||
213 | printk(KERN_INFO "Registered MMC insert/remove notification\n"); | ||
214 | out: | ||
215 | return ret; | ||
216 | } | ||