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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
* VIPER PCMCIA support
* Copyright 2004 Arcom Control Systems
*
* Maintained by Marc Zyngier <maz@misterjones.org>
* <marc.zyngier@altran.com>
*
* Based on:
* iPAQ h2200 PCMCIA support
* Copyright 2004 Koen Kooi <koen@vestingbar.nl>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <pcmcia/ss.h>
#include <asm/irq.h>
#include <mach/viper.h>
#include <asm/mach-types.h>
#include "soc_common.h"
#include "pxa2xx_base.h"
static struct pcmcia_irqs irqs[] = {
{ 0, gpio_to_irq(VIPER_CF_CD_GPIO), "PCMCIA_CD" }
};
static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
unsigned long flags;
skt->irq = gpio_to_irq(VIPER_CF_RDY_GPIO);
if (gpio_request(VIPER_CF_CD_GPIO, "CF detect"))
goto err_request_cd;
if (gpio_request(VIPER_CF_RDY_GPIO, "CF ready"))
goto err_request_rdy;
if (gpio_request(VIPER_CF_POWER_GPIO, "CF power"))
goto err_request_pwr;
local_irq_save(flags);
/* GPIO 82 is the CF power enable line. initially off */
if (gpio_direction_output(VIPER_CF_POWER_GPIO, 0) ||
gpio_direction_input(VIPER_CF_CD_GPIO) ||
gpio_direction_input(VIPER_CF_RDY_GPIO)) {
local_irq_restore(flags);
goto err_dir;
}
local_irq_restore(flags);
return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
err_dir:
gpio_free(VIPER_CF_POWER_GPIO);
err_request_pwr:
gpio_free(VIPER_CF_RDY_GPIO);
err_request_rdy:
gpio_free(VIPER_CF_CD_GPIO);
err_request_cd:
printk(KERN_ERR "viper: Failed to setup PCMCIA GPIOs\n");
return -1;
}
/*
* Release all resources.
*/
static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
gpio_free(VIPER_CF_POWER_GPIO);
gpio_free(VIPER_CF_RDY_GPIO);
gpio_free(VIPER_CF_CD_GPIO);
}
static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->detect = gpio_get_value(VIPER_CF_CD_GPIO) ? 0 : 1;
state->ready = gpio_get_value(VIPER_CF_RDY_GPIO) ? 1 : 0;
state->bvd1 = 1;
state->bvd2 = 1;
state->wrprot = 0;
state->vs_3v = 1; /* Can only apply 3.3V */
state->vs_Xv = 0;
}
static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
/* Silently ignore Vpp, output enable, speaker enable. */
viper_cf_rst(state->flags & SS_RESET);
/* Apply socket voltage */
switch (state->Vcc) {
case 0:
gpio_set_value(VIPER_CF_POWER_GPIO, 0);
break;
case 33:
gpio_set_value(VIPER_CF_POWER_GPIO, 1);
break;
default:
printk(KERN_ERR "%s: Unsupported Vcc:%d\n",
__func__, state->Vcc);
return -1;
}
return 0;
}
static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
}
static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
}
static struct pcmcia_low_level viper_pcmcia_ops __initdata = {
.owner = THIS_MODULE,
.hw_init = viper_pcmcia_hw_init,
.hw_shutdown = viper_pcmcia_hw_shutdown,
.socket_state = viper_pcmcia_socket_state,
.configure_socket = viper_pcmcia_configure_socket,
.socket_init = viper_pcmcia_socket_init,
.socket_suspend = viper_pcmcia_socket_suspend,
.nr = 1,
};
static struct platform_device *viper_pcmcia_device;
static int __init viper_pcmcia_init(void)
{
int ret;
if (!machine_is_viper())
return -ENODEV;
viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!viper_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(viper_pcmcia_device,
&viper_pcmcia_ops,
sizeof(viper_pcmcia_ops));
if (!ret)
ret = platform_device_add(viper_pcmcia_device);
if (ret)
platform_device_put(viper_pcmcia_device);
return ret;
}
static void __exit viper_pcmcia_exit(void)
{
platform_device_unregister(viper_pcmcia_device);
}
module_init(viper_pcmcia_init);
module_exit(viper_pcmcia_exit);
MODULE_LICENSE("GPL");
|
