Commit | Line | Data |
---|---|---|
36d618be MV |
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> | |
9ed3fbf1 | 7 | * Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.com> |
36d618be MV |
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 | ||
ba388307 MV |
24 | static struct gpio palmtc_pcmcia_gpios[] = { |
25 | { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, | |
26 | { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, | |
27 | { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, | |
28 | { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, | |
29 | { GPIO_NR_PALMTC_PCMCIA_READY, GPIOF_IN, "PCMCIA Ready" }, | |
30 | { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, | |
31 | }; | |
32 | ||
36d618be MV |
33 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
34 | { | |
35 | int ret; | |
36 | ||
ba388307 MV |
37 | ret = gpio_request_array(palmtc_pcmcia_gpios, |
38 | ARRAY_SIZE(palmtc_pcmcia_gpios)); | |
36d618be | 39 | |
00293972 | 40 | skt->socket.pci_irq = IRQ_GPIO(GPIO_NR_PALMTC_PCMCIA_READY); |
36d618be | 41 | |
36d618be MV |
42 | return ret; |
43 | } | |
44 | ||
45 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
46 | { | |
ba388307 | 47 | gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
36d618be MV |
48 | } |
49 | ||
50 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
51 | struct pcmcia_state *state) | |
52 | { | |
53 | state->detect = 1; /* always inserted */ | |
54 | state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY); | |
55 | state->bvd1 = 1; | |
56 | state->bvd2 = 1; | |
57 | state->wrprot = 0; | |
58 | state->vs_3v = 1; | |
59 | state->vs_Xv = 0; | |
60 | } | |
61 | ||
62 | static int palmtc_wifi_powerdown(void) | |
63 | { | |
64 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
65 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); | |
66 | mdelay(40); | |
67 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); | |
68 | return 0; | |
69 | } | |
70 | ||
71 | static int palmtc_wifi_powerup(void) | |
72 | { | |
73 | int timeout = 50; | |
74 | ||
75 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); | |
76 | mdelay(50); | |
77 | ||
78 | /* Power up the card, 1.8V first, after a while 3.3V */ | |
79 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); | |
80 | mdelay(100); | |
81 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); | |
82 | ||
83 | /* Wait till the card is ready */ | |
84 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && | |
85 | timeout) { | |
86 | mdelay(1); | |
87 | timeout--; | |
88 | } | |
89 | ||
90 | /* Power down the WiFi in case of error */ | |
91 | if (!timeout) { | |
92 | palmtc_wifi_powerdown(); | |
93 | return 1; | |
94 | } | |
95 | ||
96 | /* Reset the card */ | |
97 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
98 | mdelay(20); | |
99 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); | |
100 | mdelay(25); | |
101 | ||
102 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
107 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
108 | const socket_state_t *state) | |
109 | { | |
6cf4442f | 110 | int ret = 1; |
36d618be MV |
111 | |
112 | if (state->Vcc == 0) | |
113 | ret = palmtc_wifi_powerdown(); | |
114 | else if (state->Vcc == 33) | |
115 | ret = palmtc_wifi_powerup(); | |
116 | ||
117 | return ret; | |
118 | } | |
119 | ||
36d618be MV |
120 | static struct pcmcia_low_level palmtc_pcmcia_ops = { |
121 | .owner = THIS_MODULE, | |
122 | ||
123 | .first = 0, | |
124 | .nr = 1, | |
125 | ||
126 | .hw_init = palmtc_pcmcia_hw_init, | |
127 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, | |
128 | ||
129 | .socket_state = palmtc_pcmcia_socket_state, | |
130 | .configure_socket = palmtc_pcmcia_configure_socket, | |
36d618be MV |
131 | }; |
132 | ||
133 | static struct platform_device *palmtc_pcmcia_device; | |
134 | ||
135 | static int __init palmtc_pcmcia_init(void) | |
136 | { | |
137 | int ret; | |
138 | ||
139 | if (!machine_is_palmtc()) | |
140 | return -ENODEV; | |
141 | ||
142 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
143 | if (!palmtc_pcmcia_device) | |
144 | return -ENOMEM; | |
145 | ||
146 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, | |
147 | sizeof(palmtc_pcmcia_ops)); | |
148 | ||
149 | if (!ret) | |
150 | ret = platform_device_add(palmtc_pcmcia_device); | |
151 | ||
152 | if (ret) | |
153 | platform_device_put(palmtc_pcmcia_device); | |
154 | ||
155 | return ret; | |
156 | } | |
157 | ||
158 | static void __exit palmtc_pcmcia_exit(void) | |
159 | { | |
160 | platform_device_unregister(palmtc_pcmcia_device); | |
161 | } | |
162 | ||
163 | module_init(palmtc_pcmcia_init); | |
164 | module_exit(palmtc_pcmcia_exit); | |
165 | ||
166 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," | |
167 | " Marek Vasut <marek.vasut@gmail.com>"); | |
168 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); | |
169 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); | |
170 | MODULE_LICENSE("GPL"); |