diff options
author | Marek Vasut <marek.vasut@gmail.com> | 2009-07-16 07:30:47 -0400 |
---|---|---|
committer | Eric Miao <eric.y.miao@gmail.com> | 2009-09-10 06:49:36 -0400 |
commit | 36d618be131547adc51c464a3a0a9f72f2449a2d (patch) | |
tree | d402dea8f4dbab8df96309e96030042d1bb3dee0 /drivers/pcmcia/pxa2xx_palmtc.c | |
parent | 5d783a2d592ce5fdc01292470059ed15998e404e (diff) |
[ARM] pxa: Palm Tungsten|C PCMCIA support
This patch adds support for PCMCIA socket found in Palm Tungsten|C.
There is Prism3 based WiFi card hardwired to that socket.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'drivers/pcmcia/pxa2xx_palmtc.c')
-rw-r--r-- | drivers/pcmcia/pxa2xx_palmtc.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_palmtc.c b/drivers/pcmcia/pxa2xx_palmtc.c new file mode 100644 index 000000000000..2c295078032a --- /dev/null +++ b/drivers/pcmcia/pxa2xx_palmtc.c | |||
@@ -0,0 +1,230 @@ | |||
1 | /* | ||
2 | * linux/drivers/pcmcia/pxa2xx_palmtc.c | ||
3 | * | ||
4 | * Driver for Palm Tungsten|C PCMCIA | ||
5 | * | ||
6 | * Copyright (C) 2008 Alex Osborne <ato@meshy.org> | ||
7 | * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com> | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License version 2 as | ||
11 | * published by the Free Software Foundation. | ||
12 | * | ||
13 | */ | ||
14 | |||
15 | #include <linux/module.h> | ||
16 | #include <linux/platform_device.h> | ||
17 | #include <linux/gpio.h> | ||
18 | #include <linux/delay.h> | ||
19 | |||
20 | #include <asm/mach-types.h> | ||
21 | #include <mach/palmtc.h> | ||
22 | #include "soc_common.h" | ||
23 | |||
24 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | ||
25 | { | ||
26 | int ret; | ||
27 | |||
28 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER1, "PCMCIA PWR1"); | ||
29 | if (ret) | ||
30 | goto err1; | ||
31 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); | ||
32 | if (ret) | ||
33 | goto err2; | ||
34 | |||
35 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER2, "PCMCIA PWR2"); | ||
36 | if (ret) | ||
37 | goto err2; | ||
38 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); | ||
39 | if (ret) | ||
40 | goto err3; | ||
41 | |||
42 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_POWER3, "PCMCIA PWR3"); | ||
43 | if (ret) | ||
44 | goto err3; | ||
45 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); | ||
46 | if (ret) | ||
47 | goto err4; | ||
48 | |||
49 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_RESET, "PCMCIA RST"); | ||
50 | if (ret) | ||
51 | goto err4; | ||
52 | ret = gpio_direction_output(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | ||
53 | if (ret) | ||
54 | goto err5; | ||
55 | |||
56 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_READY, "PCMCIA RDY"); | ||
57 | if (ret) | ||
58 | goto err5; | ||
59 | ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_READY); | ||
60 | if (ret) | ||
61 | goto err6; | ||
62 | |||
63 | ret = gpio_request(GPIO_NR_PALMTC_PCMCIA_PWRREADY, "PCMCIA PWRRDY"); | ||
64 | if (ret) | ||
65 | goto err6; | ||
66 | ret = gpio_direction_input(GPIO_NR_PALMTC_PCMCIA_PWRREADY); | ||
67 | if (ret) | ||
68 | goto err7; | ||
69 | |||
70 | skt->irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY); | ||
71 | return 0; | ||
72 | |||
73 | err7: | ||
74 | gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); | ||
75 | err6: | ||
76 | gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); | ||
77 | err5: | ||
78 | gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); | ||
79 | err4: | ||
80 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); | ||
81 | err3: | ||
82 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); | ||
83 | err2: | ||
84 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); | ||
85 | err1: | ||
86 | return ret; | ||
87 | } | ||
88 | |||
89 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | ||
90 | { | ||
91 | gpio_free(GPIO_NR_PALMTC_PCMCIA_PWRREADY); | ||
92 | gpio_free(GPIO_NR_PALMTC_PCMCIA_READY); | ||
93 | gpio_free(GPIO_NR_PALMTC_PCMCIA_RESET); | ||
94 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER3); | ||
95 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER2); | ||
96 | gpio_free(GPIO_NR_PALMTC_PCMCIA_POWER1); | ||
97 | } | ||
98 | |||
99 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | ||
100 | struct pcmcia_state *state) | ||
101 | { | ||
102 | state->detect = 1; /* always inserted */ | ||
103 | state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY); | ||
104 | state->bvd1 = 1; | ||
105 | state->bvd2 = 1; | ||
106 | state->wrprot = 0; | ||
107 | state->vs_3v = 1; | ||
108 | state->vs_Xv = 0; | ||
109 | } | ||
110 | |||
111 | static int palmtc_wifi_powerdown(void) | ||
112 | { | ||
113 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | ||
114 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); | ||
115 | mdelay(40); | ||
116 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); | ||
117 | return 0; | ||
118 | } | ||
119 | |||
120 | static int palmtc_wifi_powerup(void) | ||
121 | { | ||
122 | int timeout = 50; | ||
123 | |||
124 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); | ||
125 | mdelay(50); | ||
126 | |||
127 | /* Power up the card, 1.8V first, after a while 3.3V */ | ||
128 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); | ||
129 | mdelay(100); | ||
130 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); | ||
131 | |||
132 | /* Wait till the card is ready */ | ||
133 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && | ||
134 | timeout) { | ||
135 | mdelay(1); | ||
136 | timeout--; | ||
137 | } | ||
138 | |||
139 | /* Power down the WiFi in case of error */ | ||
140 | if (!timeout) { | ||
141 | palmtc_wifi_powerdown(); | ||
142 | return 1; | ||
143 | } | ||
144 | |||
145 | /* Reset the card */ | ||
146 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | ||
147 | mdelay(20); | ||
148 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); | ||
149 | mdelay(25); | ||
150 | |||
151 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); | ||
152 | |||
153 | return 0; | ||
154 | } | ||
155 | |||
156 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | ||
157 | const socket_state_t *state) | ||
158 | { | ||
159 | int ret; | ||
160 | |||
161 | if (state->Vcc == 0) | ||
162 | ret = palmtc_wifi_powerdown(); | ||
163 | else if (state->Vcc == 33) | ||
164 | ret = palmtc_wifi_powerup(); | ||
165 | |||
166 | return ret; | ||
167 | } | ||
168 | |||
169 | static void palmtc_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | ||
170 | { | ||
171 | } | ||
172 | |||
173 | static void palmtc_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) | ||
174 | { | ||
175 | } | ||
176 | |||
177 | static struct pcmcia_low_level palmtc_pcmcia_ops = { | ||
178 | .owner = THIS_MODULE, | ||
179 | |||
180 | .first = 0, | ||
181 | .nr = 1, | ||
182 | |||
183 | .hw_init = palmtc_pcmcia_hw_init, | ||
184 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, | ||
185 | |||
186 | .socket_state = palmtc_pcmcia_socket_state, | ||
187 | .configure_socket = palmtc_pcmcia_configure_socket, | ||
188 | |||
189 | .socket_init = palmtc_pcmcia_socket_init, | ||
190 | .socket_suspend = palmtc_pcmcia_socket_suspend, | ||
191 | }; | ||
192 | |||
193 | static struct platform_device *palmtc_pcmcia_device; | ||
194 | |||
195 | static int __init palmtc_pcmcia_init(void) | ||
196 | { | ||
197 | int ret; | ||
198 | |||
199 | if (!machine_is_palmtc()) | ||
200 | return -ENODEV; | ||
201 | |||
202 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | ||
203 | if (!palmtc_pcmcia_device) | ||
204 | return -ENOMEM; | ||
205 | |||
206 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, | ||
207 | sizeof(palmtc_pcmcia_ops)); | ||
208 | |||
209 | if (!ret) | ||
210 | ret = platform_device_add(palmtc_pcmcia_device); | ||
211 | |||
212 | if (ret) | ||
213 | platform_device_put(palmtc_pcmcia_device); | ||
214 | |||
215 | return ret; | ||
216 | } | ||
217 | |||
218 | static void __exit palmtc_pcmcia_exit(void) | ||
219 | { | ||
220 | platform_device_unregister(palmtc_pcmcia_device); | ||
221 | } | ||
222 | |||
223 | module_init(palmtc_pcmcia_init); | ||
224 | module_exit(palmtc_pcmcia_exit); | ||
225 | |||
226 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," | ||
227 | " Marek Vasut <marek.vasut@gmail.com>"); | ||
228 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); | ||
229 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); | ||
230 | MODULE_LICENSE("GPL"); | ||