drivers/pcmcia/pxa2xx_vpac270.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_vpac270.c
   3  *
   4  * Driver for Voipac PXA270 PCMCIA and CF sockets
   5  *
   6  * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16
  17 #include <asm/mach-types.h>
  18
  19 #include <mach/gpio.h>
  20 #include <mach/vpac270.h>
  21
  22 #include "soc_common.h"
  23
  24 static struct gpio vpac270_pcmcia_gpios[] = {
  25         { GPIO84_VPAC270_PCMCIA_CD,     GPIOF_IN,       "PCMCIA Card Detect" },
  26         { GPIO35_VPAC270_PCMCIA_RDY,    GPIOF_IN,       "PCMCIA Ready" },
  27         { GPIO107_VPAC270_PCMCIA_PPEN,  GPIOF_INIT_LOW, "PCMCIA PPEN" },
  28         { GPIO11_VPAC270_PCMCIA_RESET,  GPIOF_INIT_LOW, "PCMCIA Reset" },
  29 };
  30
  31 static struct gpio vpac270_cf_gpios[] = {
  32         { GPIO17_VPAC270_CF_CD,         GPIOF_IN,       "CF Card Detect" },
  33         { GPIO12_VPAC270_CF_RDY,        GPIOF_IN,       "CF Ready" },
  34         { GPIO16_VPAC270_CF_RESET,      GPIOF_INIT_LOW, "CF Reset" },
  35 };
  36
  37 static struct pcmcia_irqs cd_irqs[] = {
  38         {
  39                 .sock = 0,
  40                 .irq  = IRQ_GPIO(GPIO84_VPAC270_PCMCIA_CD),
  41                 .str  = "PCMCIA CD"
  42         },
  43         {
  44                 .sock = 1,
  45                 .irq  = IRQ_GPIO(GPIO17_VPAC270_CF_CD),
  46                 .str  = "CF CD"
  47         },
  48 };
  49
  50 static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  51 {
  52         int ret;
  53
  54         if (skt->nr == 0) {
  55                 ret = gpio_request_array(vpac270_pcmcia_gpios,
  56                                 ARRAY_SIZE(vpac270_pcmcia_gpios));
  57
  58                 skt->socket.pci_irq = gpio_to_irq(GPIO35_VPAC270_PCMCIA_RDY);
  59
  60                 if (!ret)
  61                         ret = soc_pcmcia_request_irqs(skt, &cd_irqs[0], 1);
  62         } else {
  63                 ret = gpio_request_array(vpac270_cf_gpios,
  64                                 ARRAY_SIZE(vpac270_cf_gpios));
  65
  66                 skt->socket.pci_irq = gpio_to_irq(GPIO12_VPAC270_CF_RDY);
  67
  68                 if (!ret)
  69                         ret = soc_pcmcia_request_irqs(skt, &cd_irqs[1], 1);
  70         }
  71
  72         return ret;
  73 }
  74
  75 static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  76 {
  77         if (skt->nr == 0)
  78                 gpio_request_array(vpac270_pcmcia_gpios,
  79                                         ARRAY_SIZE(vpac270_pcmcia_gpios));
  80         else
  81                 gpio_request_array(vpac270_cf_gpios,
  82                                         ARRAY_SIZE(vpac270_cf_gpios));
  83 }
  84
  85 static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  86                                         struct pcmcia_state *state)
  87 {
  88         if (skt->nr == 0) {
  89                 state->detect = !gpio_get_value(GPIO84_VPAC270_PCMCIA_CD);
  90                 state->ready  = !!gpio_get_value(GPIO35_VPAC270_PCMCIA_RDY);
  91         } else {
  92                 state->detect = !gpio_get_value(GPIO17_VPAC270_CF_CD);
  93                 state->ready  = !!gpio_get_value(GPIO12_VPAC270_CF_RDY);
  94         }
  95         state->bvd1   = 1;
  96         state->bvd2   = 1;
  97         state->wrprot = 0;
  98         state->vs_3v  = 1;
  99         state->vs_Xv  = 0;
 100 }
 101
 102 static int
 103 vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 104                                 const socket_state_t *state)
 105 {
 106         if (skt->nr == 0) {
 107                 gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
 108                         (state->flags & SS_RESET));
 109                 gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
 110                         !(state->Vcc == 33 || state->Vcc == 50));
 111         } else {
 112                 gpio_set_value(GPIO16_VPAC270_CF_RESET,
 113                         (state->flags & SS_RESET));
 114         }
 115
 116         return 0;
 117 }
 118
 119 static void vpac270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 120 {
 121 }
 122
 123 static void vpac270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 124 {
 125 }
 126
 127 static struct pcmcia_low_level vpac270_pcmcia_ops = {
 128         .owner                  = THIS_MODULE,
 129
 130         .first                  = 0,
 131         .nr                     = 2,
 132
 133         .hw_init                = vpac270_pcmcia_hw_init,
 134         .hw_shutdown            = vpac270_pcmcia_hw_shutdown,
 135
 136         .socket_state           = vpac270_pcmcia_socket_state,
 137         .configure_socket       = vpac270_pcmcia_configure_socket,
 138
 139         .socket_init            = vpac270_pcmcia_socket_init,
 140         .socket_suspend         = vpac270_pcmcia_socket_suspend,
 141 };
 142
 143 static struct platform_device *vpac270_pcmcia_device;
 144
 145 static int __init vpac270_pcmcia_init(void)
 146 {
 147         int ret;
 148
 149         if (!machine_is_vpac270())
 150                 return -ENODEV;
 151
 152         vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 153         if (!vpac270_pcmcia_device)
 154                 return -ENOMEM;
 155
 156         ret = platform_device_add_data(vpac270_pcmcia_device,
 157                 &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
 158
 159         if (!ret)
 160                 ret = platform_device_add(vpac270_pcmcia_device);
 161
 162         if (ret)
 163                 platform_device_put(vpac270_pcmcia_device);
 164
 165         return ret;
 166 }
 167
 168 static void __exit vpac270_pcmcia_exit(void)
 169 {
 170         platform_device_unregister(vpac270_pcmcia_device);
 171 }
 172
 173 module_init(vpac270_pcmcia_init);
 174 module_exit(vpac270_pcmcia_exit);
 175
 176 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 177 MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
 178 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 179 MODULE_LICENSE("GPL");