blob: f663a011bf4a5da39df79e3d9c71af7041aa1b86 [file] [log] [blame]
Ian Moltone38a9702008-10-07 22:01:59 +01001/*
2 * Toshiba e740 PCMCIA specific routines.
3 *
4 * (c) 2004 Ian Molton <spyro@f2s.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/init.h>
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/errno.h>
15#include <linux/gpio.h>
16#include <linux/interrupt.h>
17#include <linux/platform_device.h>
18
19#include <mach/hardware.h>
20#include <mach/pxa-regs.h>
21#include <mach/eseries-gpio.h>
22
23#include <asm/irq.h>
24#include <asm/mach-types.h>
25
26#include "soc_common.h"
27
28static struct pcmcia_irqs cd_irqs[] = {
29 {
30 .sock = 0,
31 .irq = IRQ_GPIO(GPIO_E740_PCMCIA_CD0),
32 .str = "CF card detect"
33 },
34 {
35 .sock = 1,
36 .irq = IRQ_GPIO(GPIO_E740_PCMCIA_CD1),
37 .str = "Wifi switch"
38 },
39};
40
41static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42{
43 skt->irq = skt->nr == 0 ? IRQ_GPIO(GPIO_E740_PCMCIA_RDY0) :
44 IRQ_GPIO(GPIO_E740_PCMCIA_RDY1);
45
46 return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
47}
48
49/*
50 * Release all resources.
51 */
52static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
53{
54 soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
55}
56
57static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
58 struct pcmcia_state *state)
59{
60 if (skt->nr == 0) {
61 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
62 state->ready = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
63 } else {
64 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
65 state->ready = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
66 }
67
68 state->vs_3v = 1;
69 state->bvd1 = 1;
70 state->bvd2 = 1;
71 state->wrprot = 0;
72 state->vs_Xv = 0;
73}
74
75static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
76 const socket_state_t *state)
77{
78 if (state->flags & SS_RESET) {
79 if (skt->nr == 0)
80 gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
81 else
82 gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
83 } else {
84 if (skt->nr == 0)
85 gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
86 else
87 gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
88 }
89
90 switch (state->Vcc) {
91 case 0: /* Socket off */
92 if (skt->nr == 0)
93 gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
94 else
95 gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
96 break;
97 case 50:
98 case 33: /* socket on */
99 if (skt->nr == 0)
100 gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
101 else
102 gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
103 break;
104 default:
105 printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
106 }
107
108 return 0;
109}
110
111/*
112 * Enable card status IRQs on (re-)initialisation. This can
113 * be called at initialisation, power management event, or
114 * pcmcia event.
115 */
116static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
117{
118 soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
119}
120
121/*
122 * Disable card status IRQs on suspend.
123 */
124static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
125{
126 soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
127}
128
129static struct pcmcia_low_level e740_pcmcia_ops = {
130 .owner = THIS_MODULE,
131 .hw_init = e740_pcmcia_hw_init,
132 .hw_shutdown = e740_pcmcia_hw_shutdown,
133 .socket_state = e740_pcmcia_socket_state,
134 .configure_socket = e740_pcmcia_configure_socket,
135 .socket_init = e740_pcmcia_socket_init,
136 .socket_suspend = e740_pcmcia_socket_suspend,
137 .nr = 2,
138};
139
140static struct platform_device *e740_pcmcia_device;
141
142static int __init e740_pcmcia_init(void)
143{
144 int ret;
145
146 if (!machine_is_e740())
147 return -ENODEV;
148
149 e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
150 if (!e740_pcmcia_device)
151 return -ENOMEM;
152
153 ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
154 sizeof(e740_pcmcia_ops));
155
156 if (!ret)
157 ret = platform_device_add(e740_pcmcia_device);
158
159 if (ret)
160 platform_device_put(e740_pcmcia_device);
161
162 return ret;
163}
164
165static void __exit e740_pcmcia_exit(void)
166{
167 platform_device_unregister(e740_pcmcia_device);
168}
169
170module_init(e740_pcmcia_init);
171module_exit(e740_pcmcia_exit);
172
173MODULE_LICENSE("GPL v2");
174MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
175MODULE_ALIAS("platform:pxa2xx-pcmcia");
176MODULE_DESCRIPTION("e740 PCMCIA platform support");