drivers/pcmcia/pxa2xx_e740.c

   1 /*
   2  * Toshiba e740 PCMCIA specific routines.
   3  *
   4  * (c) 2004 Ian Molton <spyro@f2s.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/gpio.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/platform_device.h>
  18
  19 #include <mach/eseries-gpio.h>
  20
  21 #include <asm/irq.h>
  22 #include <asm/mach-types.h>
  23
  24 #include "soc_common.h"
  25
  26 static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  27 {
  28         if (skt->nr == 0) {
  29                 skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
  30                 skt->stat[SOC_STAT_CD].name = "CF card detect";
  31                 skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
  32                 skt->stat[SOC_STAT_RDY].name = "CF ready";
  33         } else {
  34                 skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
  35                 skt->stat[SOC_STAT_CD].name = "Wifi switch";
  36                 skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
  37                 skt->stat[SOC_STAT_RDY].name = "Wifi ready";
  38         }
  39
  40         return 0;
  41 }
  42
  43 static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  44                                         struct pcmcia_state *state)
  45 {
  46         state->vs_3v  = 1;
  47         state->vs_Xv  = 0;
  48 }
  49
  50 static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  51                                         const socket_state_t *state)
  52 {
  53         if (state->flags & SS_RESET) {
  54                 if (skt->nr == 0)
  55                         gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  56                 else
  57                         gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  58         } else {
  59                 if (skt->nr == 0)
  60                         gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  61                 else
  62                         gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  63         }
  64
  65         switch (state->Vcc) {
  66         case 0: /* Socket off */
  67                 if (skt->nr == 0)
  68                         gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  69                 else
  70                         gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  71                 break;
  72         case 50:
  73         case 33: /* socket on */
  74                 if (skt->nr == 0)
  75                         gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
  76                 else
  77                         gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
  78                 break;
  79         default:
  80                 printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
  81         }
  82
  83         return 0;
  84 }
  85
  86 static struct pcmcia_low_level e740_pcmcia_ops = {
  87         .owner            = THIS_MODULE,
  88         .hw_init          = e740_pcmcia_hw_init,
  89         .socket_state     = e740_pcmcia_socket_state,
  90         .configure_socket = e740_pcmcia_configure_socket,
  91         .nr               = 2,
  92 };
  93
  94 static struct platform_device *e740_pcmcia_device;
  95
  96 static int __init e740_pcmcia_init(void)
  97 {
  98         int ret;
  99
 100         if (!machine_is_e740())
 101                 return -ENODEV;
 102
 103         e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 104         if (!e740_pcmcia_device)
 105                 return -ENOMEM;
 106
 107         ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 108                                         sizeof(e740_pcmcia_ops));
 109
 110         if (!ret)
 111                 ret = platform_device_add(e740_pcmcia_device);
 112
 113         if (ret)
 114                 platform_device_put(e740_pcmcia_device);
 115
 116         return ret;
 117 }
 118
 119 static void __exit e740_pcmcia_exit(void)
 120 {
 121         platform_device_unregister(e740_pcmcia_device);
 122 }
 123
 124 module_init(e740_pcmcia_init);
 125 module_exit(e740_pcmcia_exit);
 126
 127 MODULE_LICENSE("GPL v2");
 128 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 129 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 130 MODULE_DESCRIPTION("e740 PCMCIA platform support");