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