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