pxa2xx_stargate2.c
3.39 KB
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
/*
* linux/drivers/pcmcia/pxa2xx_stargate2.c
*
* Stargate 2 PCMCIA specific routines.
*
* Created: December 6, 2005
* Author: Ed C. Epp
* Copyright: Intel Corp 2005
* Jonathan Cameron <jic23@cam.ac.uk> 2009
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <pcmcia/ss.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include "soc_common.h"
#define SG2_S0_POWER_CTL 108
#define SG2_S0_GPIO_RESET 82
#define SG2_S0_GPIO_DETECT 53
#define SG2_S0_GPIO_READY 81
static struct gpio sg2_pcmcia_gpios[] = {
{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
};
static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
return 0;
}
static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->bvd1 = 0; /* not available - battery detect on card */
state->bvd2 = 0; /* not available */
state->vs_3v = 1; /* not available - voltage detect for card */
state->vs_Xv = 0; /* not available */
}
static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
/* Enable card power */
switch (state->Vcc) {
case 0:
/* sets power ctl register high */
gpio_set_value(SG2_S0_POWER_CTL, 1);
break;
case 33:
case 50:
/* sets power control register low (clear) */
gpio_set_value(SG2_S0_POWER_CTL, 0);
msleep(100);
break;
default:
pr_err("%s(): bad Vcc %u\n",
__func__, state->Vcc);
return -1;
}
/* reset */
gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
return 0;
}
static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
.owner = THIS_MODULE,
.hw_init = sg2_pcmcia_hw_init,
.socket_state = sg2_pcmcia_socket_state,
.configure_socket = sg2_pcmcia_configure_socket,
.nr = 1,
};
static struct platform_device *sg2_pcmcia_device;
static int __init sg2_pcmcia_init(void)
{
int ret;
if (!machine_is_stargate2())
return -ENODEV;
sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!sg2_pcmcia_device)
return -ENOMEM;
ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
if (ret)
goto error_put_platform_device;
ret = platform_device_add_data(sg2_pcmcia_device,
&sg2_pcmcia_ops,
sizeof(sg2_pcmcia_ops));
if (ret)
goto error_free_gpios;
ret = platform_device_add(sg2_pcmcia_device);
if (ret)
goto error_free_gpios;
return 0;
error_free_gpios:
gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
error_put_platform_device:
platform_device_put(sg2_pcmcia_device);
return ret;
}
static void __exit sg2_pcmcia_exit(void)
{
platform_device_unregister(sg2_pcmcia_device);
gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
}
fs_initcall(sg2_pcmcia_init);
module_exit(sg2_pcmcia_exit);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");