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