aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/pcmcia/pxa2xx_cm_x270.c
blob: bcff5cfed051b19a8db8dc21669e31c31153a6fe (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * linux/drivers/pcmcia/pxa/pxa_cm_x270.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Compulab Ltd., 2003, 2007, 2008
 * Mike Rapoport <mike@compulab.co.il>
 *
 */

#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <mach/pxa-regs.h>

#include "soc_common.h"

#define GPIO_PCMCIA_S0_CD_VALID	(84)
#define GPIO_PCMCIA_S0_RDYINT	(82)
#define GPIO_PCMCIA_RESET	(53)

#define PCMCIA_S0_CD_VALID	IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
#define PCMCIA_S0_RDYINT	IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)


static struct pcmcia_irqs irqs[] = {
	{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
};

static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
	if (ret)
		return ret;
	gpio_direction_output(GPIO_PCMCIA_RESET, 0);

	skt->irq = PCMCIA_S0_RDYINT;
	ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
	if (!ret)
		gpio_free(GPIO_PCMCIA_RESET);

	return ret;
}

static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
{
	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
	gpio_free(GPIO_PCMCIA_RESET);
}


static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				       struct pcmcia_state *state)
{
	state->detect = (gpio_get_value(GPIO_PCMCIA_S0_CD_VALID) == 0) ? 1 : 0;
	state->ready  = (gpio_get_value(GPIO_PCMCIA_S0_RDYINT) == 0) ? 0 : 1;
	state->bvd1   = 1;
	state->bvd2   = 1;
	state->vs_3v  = 0;
	state->vs_Xv  = 0;
	state->wrprot = 0;  /* not available */
}


static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
					  const socket_state_t *state)
{
	switch (skt->nr) {
	case 0:
		if (state->flags & SS_RESET) {
			gpio_set_value(GPIO_PCMCIA_RESET, 1);
			udelay(10);
			gpio_set_value(GPIO_PCMCIA_RESET, 0);
		}
		break;
	}

	return 0;
}

static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}

static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}


static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
	.owner			= THIS_MODULE,
	.hw_init		= cmx270_pcmcia_hw_init,
	.hw_shutdown		= cmx270_pcmcia_shutdown,
	.socket_state		= cmx270_pcmcia_socket_state,
	.configure_socket	= cmx270_pcmcia_configure_socket,
	.socket_init		= cmx270_pcmcia_socket_init,
	.socket_suspend		= cmx270_pcmcia_socket_suspend,
	.nr			= 1,
};

static struct platform_device *cmx270_pcmcia_device;

static int __init cmx270_pcmcia_init(void)
{
	int ret;

	if (!machine_is_armcore())
		return -ENODEV;

	cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

	if (!cmx270_pcmcia_device)
		return -ENOMEM;

	ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
				       sizeof(cmx270_pcmcia_ops));

	if (ret == 0) {
		printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
		ret = platform_device_add(cmx270_pcmcia_device);
	}

	if (ret)
		platform_device_put(cmx270_pcmcia_device);

	return ret;
}

static void __exit cmx270_pcmcia_exit(void)
{
	platform_device_unregister(cmx270_pcmcia_device);
}

module_init(cmx270_pcmcia_init);
module_exit(cmx270_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
MODULE_DESCRIPTION("CM-x270 PCMCIA driver");