1 /*
2 * linux/drivers/pcmcia/pxa/pxa_cm_x270.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_S0_CD_VALID (84)
22 #define GPIO_PCMCIA_S0_RDYINT (82)
23 #define GPIO_PCMCIA_RESET (53)
24
cmx270_pcmcia_hw_init(struct soc_pcmcia_socket * skt)25 static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
26 {
27 int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
28 if (ret)
29 return ret;
30 gpio_direction_output(GPIO_PCMCIA_RESET, 0);
31
32 skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
33 skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
34 skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
35 skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
36
37 return ret;
38 }
39
cmx270_pcmcia_shutdown(struct soc_pcmcia_socket * skt)40 static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
41 {
42 gpio_free(GPIO_PCMCIA_RESET);
43 }
44
45
cmx270_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)46 static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
47 struct pcmcia_state *state)
48 {
49 state->vs_3v = 0;
50 state->vs_Xv = 0;
51 }
52
53
cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)54 static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
55 const socket_state_t *state)
56 {
57 switch (skt->nr) {
58 case 0:
59 if (state->flags & SS_RESET) {
60 gpio_set_value(GPIO_PCMCIA_RESET, 1);
61 udelay(10);
62 gpio_set_value(GPIO_PCMCIA_RESET, 0);
63 }
64 break;
65 }
66
67 return 0;
68 }
69
70 static struct pcmcia_low_level cmx270_pcmcia_ops __initdata = {
71 .owner = THIS_MODULE,
72 .hw_init = cmx270_pcmcia_hw_init,
73 .hw_shutdown = cmx270_pcmcia_shutdown,
74 .socket_state = cmx270_pcmcia_socket_state,
75 .configure_socket = cmx270_pcmcia_configure_socket,
76 .nr = 1,
77 };
78
79 static struct platform_device *cmx270_pcmcia_device;
80
cmx270_pcmcia_init(void)81 int __init cmx270_pcmcia_init(void)
82 {
83 int ret;
84
85 cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
86
87 if (!cmx270_pcmcia_device)
88 return -ENOMEM;
89
90 ret = platform_device_add_data(cmx270_pcmcia_device, &cmx270_pcmcia_ops,
91 sizeof(cmx270_pcmcia_ops));
92
93 if (ret == 0) {
94 printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
95 ret = platform_device_add(cmx270_pcmcia_device);
96 }
97
98 if (ret)
99 platform_device_put(cmx270_pcmcia_device);
100
101 return ret;
102 }
103
cmx270_pcmcia_exit(void)104 void __exit cmx270_pcmcia_exit(void)
105 {
106 platform_device_unregister(cmx270_pcmcia_device);
107 }
108
