Root/drivers/pcmcia/pxa2xx_cm_x270.c

1/*
2 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Compulab Ltd., 2003, 2007, 2008
9 * Mike Rapoport <mike@compulab.co.il>
10 *
11 */
12
13#include <linux/platform_device.h>
14#include <linux/irq.h>
15#include <linux/delay.h>
16#include <linux/gpio.h>
17
18#include <asm/mach-types.h>
19
20#include "soc_common.h"
21
22#define GPIO_PCMCIA_S0_CD_VALID (84)
23#define GPIO_PCMCIA_S0_RDYINT (82)
24#define GPIO_PCMCIA_RESET (53)
25
26#define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
27#define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
28
29
30static struct pcmcia_irqs irqs[] = {
31    { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
32};
33
34static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
35{
36    int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
37    if (ret)
38        return ret;
39    gpio_direction_output(GPIO_PCMCIA_RESET, 0);
40
41    skt->socket.pci_irq = PCMCIA_S0_RDYINT;
42    ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
43    if (!ret)
44        gpio_free(GPIO_PCMCIA_RESET);
45
46    return ret;
47}
48
49static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
50{
51    soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
52    gpio_free(GPIO_PCMCIA_RESET);
53}
54
55
56static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57                       struct pcmcia_state *state)
58{
59    state->detect = (gpio_get_value(GPIO_PCMCIA_S0_CD_VALID) == 0) ? 1 : 0;
60    state->ready = (gpio_get_value(GPIO_PCMCIA_S0_RDYINT) == 0) ? 0 : 1;
61    state->bvd1 = 1;
62    state->bvd2 = 1;
63    state->vs_3v = 0;
64    state->vs_Xv = 0;
65    state->wrprot = 0; /* not available */
66}
67
68
69static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
70                      const socket_state_t *state)
71{
72    switch (skt->nr) {
73    case 0:
74        if (state->flags & SS_RESET) {
75            gpio_set_value(GPIO_PCMCIA_RESET, 1);
76            udelay(10);
77            gpio_set_value(GPIO_PCMCIA_RESET, 0);
78        }
79        break;
80    }
81
82    return 0;
83}
84
85static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
86{
87}
88
89static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
90{
91}
92
93
94static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
95    .owner = THIS_MODULE,
96    .hw_init = cmx270_pcmcia_hw_init,
97    .hw_shutdown = cmx270_pcmcia_shutdown,
98    .socket_state = cmx270_pcmcia_socket_state,
99    .configure_socket = cmx270_pcmcia_configure_socket,
100    .socket_init = cmx270_pcmcia_socket_init,
101    .socket_suspend = cmx270_pcmcia_socket_suspend,
102    .nr = 1,
103};
104
105static struct platform_device *cmx270_pcmcia_device;
106
107int __init cmx270_pcmcia_init(void)
108{
109    int ret;
110
111    cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
112
113    if (!cmx270_pcmcia_device)
114        return -ENOMEM;
115
116    ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
117                       sizeof(cmx270_pcmcia_ops));
118
119    if (ret == 0) {
120        printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
121        ret = platform_device_add(cmx270_pcmcia_device);
122    }
123
124    if (ret)
125        platform_device_put(cmx270_pcmcia_device);
126
127    return ret;
128}
129
130void __exit cmx270_pcmcia_exit(void)
131{
132    platform_device_unregister(cmx270_pcmcia_device);
133}
134

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