Root/drivers/pcmcia/pxa2xx_cm_x255.c

1/*
2 * linux/drivers/pcmcia/pxa/pxa_cm_x255.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#include <linux/export.h>
18
19#include "soc_common.h"
20
21#define GPIO_PCMCIA_SKTSEL (54)
22#define GPIO_PCMCIA_S0_CD_VALID (16)
23#define GPIO_PCMCIA_S1_CD_VALID (17)
24#define GPIO_PCMCIA_S0_RDYINT (6)
25#define GPIO_PCMCIA_S1_RDYINT (8)
26#define GPIO_PCMCIA_RESET (9)
27
28static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
29{
30    int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
31    if (ret)
32        return ret;
33    gpio_direction_output(GPIO_PCMCIA_RESET, 0);
34
35    if (skt->nr == 0) {
36        skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
37        skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
38        skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
39        skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
40    } else {
41        skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID;
42        skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
43        skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT;
44        skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY";
45    }
46
47    return 0;
48}
49
50static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
51{
52    gpio_free(GPIO_PCMCIA_RESET);
53}
54
55
56static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
57                       struct pcmcia_state *state)
58{
59    state->vs_3v = 0;
60    state->vs_Xv = 0;
61}
62
63
64static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
65                      const socket_state_t *state)
66{
67    switch (skt->nr) {
68    case 0:
69        if (state->flags & SS_RESET) {
70            gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
71            udelay(1);
72            gpio_set_value(GPIO_PCMCIA_RESET, 1);
73            udelay(10);
74            gpio_set_value(GPIO_PCMCIA_RESET, 0);
75        }
76        break;
77    case 1:
78        if (state->flags & SS_RESET) {
79            gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
80            udelay(1);
81            gpio_set_value(GPIO_PCMCIA_RESET, 1);
82            udelay(10);
83            gpio_set_value(GPIO_PCMCIA_RESET, 0);
84        }
85        break;
86    }
87
88    return 0;
89}
90
91static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
92    .owner = THIS_MODULE,
93    .hw_init = cmx255_pcmcia_hw_init,
94    .hw_shutdown = cmx255_pcmcia_shutdown,
95    .socket_state = cmx255_pcmcia_socket_state,
96    .configure_socket = cmx255_pcmcia_configure_socket,
97    .nr = 1,
98};
99
100static struct platform_device *cmx255_pcmcia_device;
101
102int __init cmx255_pcmcia_init(void)
103{
104    int ret;
105
106    cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
107
108    if (!cmx255_pcmcia_device)
109        return -ENOMEM;
110
111    ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
112                       sizeof(cmx255_pcmcia_ops));
113
114    if (ret == 0) {
115        printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
116        ret = platform_device_add(cmx255_pcmcia_device);
117    }
118
119    if (ret)
120        platform_device_put(cmx255_pcmcia_device);
121
122    return ret;
123}
124
125void __exit cmx255_pcmcia_exit(void)
126{
127    platform_device_unregister(cmx255_pcmcia_device);
128}
129

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