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 struct pcmcia_irqs cd_irqs[] = {
  27         {
  28                 .sock = 0,
  29                 .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD0),
  30                 .str  = "CF card detect"
  31         },
  32         {
  33                 .sock = 1,
  34                 .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD1),
  35                 .str  = "Wifi switch"
  36         },
  37 };
  38
  39 static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  40 {
  41         skt->irq = skt->nr == 0 ? IRQ_GPIO(GPIO_E740_PCMCIA_RDY0) :
  42                                 IRQ_GPIO(GPIO_E740_PCMCIA_RDY1);
  43
  44         return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
  45 }
  46
  47 /*
  48  * Release all resources.
  49  */
  50 static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  51 {
  52         soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
  53 }
  54
  55 static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  56                                         struct pcmcia_state *state)
  57 {
  58         if (skt->nr == 0) {
  59                 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
  60                 state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
  61         } else {
  62                 state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
  63                 state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
  64         }
  65
  66         state->vs_3v  = 1;
  67         state->bvd1   = 1;
  68         state->bvd2   = 1;
  69         state->wrprot = 0;
  70         state->vs_Xv  = 0;
  71 }
  72
  73 static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  74                                         const socket_state_t *state)
  75 {
  76         if (state->flags & SS_RESET) {
  77                 if (skt->nr == 0)
  78                         gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
  79                 else
  80                         gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
  81         } else {
  82                 if (skt->nr == 0)
  83                         gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
  84                 else
  85                         gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
  86         }
  87
  88         switch (state->Vcc) {
  89         case 0: /* Socket off */
  90                 if (skt->nr == 0)
  91                         gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
  92                 else
  93                         gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
  94                 break;
  95         case 50:
  96         case 33: /* socket on */
  97                 if (skt->nr == 0)
  98                         gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
  99                 else
 100                         gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
 101                 break;
 102         default:
 103                 printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
 104         }
 105
 106         return 0;
 107 }
 108
 109 /*
 110  * Enable card status IRQs on (re-)initialisation.  This can
 111  * be called at initialisation, power management event, or
 112  * pcmcia event.
 113  */
 114 static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 115 {
 116         soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 117 }
 118
 119 /*
 120  * Disable card status IRQs on suspend.
 121  */
 122 static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 123 {
 124         soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
 125 }
 126
 127 static struct pcmcia_low_level e740_pcmcia_ops = {
 128         .owner            = THIS_MODULE,
 129         .hw_init          = e740_pcmcia_hw_init,
 130         .hw_shutdown      = e740_pcmcia_hw_shutdown,
 131         .socket_state     = e740_pcmcia_socket_state,
 132         .configure_socket = e740_pcmcia_configure_socket,
 133         .socket_init      = e740_pcmcia_socket_init,
 134         .socket_suspend   = e740_pcmcia_socket_suspend,
 135         .nr               = 2,
 136 };
 137
 138 static struct platform_device *e740_pcmcia_device;
 139
 140 static int __init e740_pcmcia_init(void)
 141 {
 142         int ret;
 143
 144         if (!machine_is_e740())
 145                 return -ENODEV;
 146
 147         e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 148         if (!e740_pcmcia_device)
 149                 return -ENOMEM;
 150
 151         ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
 152                                         sizeof(e740_pcmcia_ops));
 153
 154         if (!ret)
 155                 ret = platform_device_add(e740_pcmcia_device);
 156
 157         if (ret)
 158                 platform_device_put(e740_pcmcia_device);
 159
 160         return ret;
 161 }
 162
 163 static void __exit e740_pcmcia_exit(void)
 164 {
 165         platform_device_unregister(e740_pcmcia_device);
 166 }
 167
 168 module_init(e740_pcmcia_init);
 169 module_exit(e740_pcmcia_exit);
 170
 171 MODULE_LICENSE("GPL v2");
 172 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
 173 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 174 MODULE_DESCRIPTION("e740 PCMCIA platform support");