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