Linux Kernel  3.7.1
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pxa2xx_cm_x270.c
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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 <[email protected]>
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 
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;
31 
33  skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
35  skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
36 
37  return ret;
38 }
39 
40 static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
41 {
43 }
44 
45 
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 
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) {
61  udelay(10);
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 
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 
105 {
106  platform_device_unregister(cmx270_pcmcia_device);
107 }