tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * linux/drivers/pcmcia/pxa2xx_palmtx.c
3 *
4 * Driver for Palm T|X PCMCIA
5 *
6 * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 */
13
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/gpio.h>
17
18#include <asm/mach-types.h>
19#include <mach/palmtx.h>
20#include "soc_common.h"
21
22static struct gpio palmtx_pcmcia_gpios[] = {
23 { GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
24 { GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
25 { GPIO_NR_PALMTX_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
26 { GPIO_NR_PALMTX_PCMCIA_READY, GPIOF_IN, "PCMCIA Ready" },
27};
28
29static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
30{
31 int ret;
32
33 ret = gpio_request_array(palmtx_pcmcia_gpios,
34 ARRAY_SIZE(palmtx_pcmcia_gpios));
35
36 skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTX_PCMCIA_READY);
37
38 return ret;
39}
40
41static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
42{
43 gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
44}
45
46static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
47 struct pcmcia_state *state)
48{
49 state->detect = 1; /* always inserted */
50 state->ready = !!gpio_get_value(GPIO_NR_PALMTX_PCMCIA_READY);
51 state->bvd1 = 1;
52 state->bvd2 = 1;
53 state->wrprot = 0;
54 state->vs_3v = 1;
55 state->vs_Xv = 0;
56}
57
58static int
59palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
60 const socket_state_t *state)
61{
62 gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
63 gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
64 gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
65 !!(state->flags & SS_RESET));
66
67 return 0;
68}
69
70static struct pcmcia_low_level palmtx_pcmcia_ops = {
71 .owner = THIS_MODULE,
72
73 .first = 0,
74 .nr = 1,
75
76 .hw_init = palmtx_pcmcia_hw_init,
77 .hw_shutdown = palmtx_pcmcia_hw_shutdown,
78
79 .socket_state = palmtx_pcmcia_socket_state,
80 .configure_socket = palmtx_pcmcia_configure_socket,
81};
82
83static struct platform_device *palmtx_pcmcia_device;
84
85static int __init palmtx_pcmcia_init(void)
86{
87 int ret;
88
89 if (!machine_is_palmtx())
90 return -ENODEV;
91
92 palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
93 if (!palmtx_pcmcia_device)
94 return -ENOMEM;
95
96 ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
97 sizeof(palmtx_pcmcia_ops));
98
99 if (!ret)
100 ret = platform_device_add(palmtx_pcmcia_device);
101
102 if (ret)
103 platform_device_put(palmtx_pcmcia_device);
104
105 return ret;
106}
107
108static void __exit palmtx_pcmcia_exit(void)
109{
110 platform_device_unregister(palmtx_pcmcia_device);
111}
112
113module_init(palmtx_pcmcia_init);
114module_exit(palmtx_pcmcia_exit);
115
116MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
117MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
118MODULE_ALIAS("platform:pxa2xx-pcmcia");
119MODULE_LICENSE("GPL");