release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/pcmcia/pxa2xx_viper.c

   1 /*
   2  * Viper/Zeus PCMCIA support
   3  *   Copyright 2004 Arcom Control Systems
   4  *
   5  * Maintained by Marc Zyngier <maz@misterjones.org>
   6  *
   7  * Based on:
   8  *   iPAQ h2200 PCMCIA support
   9  *   Copyright 2004 Koen Kooi <koen@vestingbar.nl>
  10  *
  11  * This file is subject to the terms and conditions of the GNU General Public
  12  * License.  See the file COPYING in the main directory of this archive for
  13  * more details.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/gpio.h>
  23
  24 #include <pcmcia/ss.h>
  25
  26 #include <asm/irq.h>
  27
  28 #include <mach/arcom-pcmcia.h>
  29
  30 #include "soc_common.h"
  31 #include "pxa2xx_base.h"
  32
  33 static struct platform_device *arcom_pcmcia_dev;
  34
  35 static struct pcmcia_irqs irqs[] = {
  36         {
  37                 .sock   = 0,
  38                 .str    = "PCMCIA_CD",
  39         },
  40 };
  41
  42 static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
  43 {
  44         return arcom_pcmcia_dev->dev.platform_data;
  45 }
  46
  47 static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  48 {
  49         struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
  50         unsigned long flags;
  51
  52         skt->socket.pci_irq = gpio_to_irq(pdata->rdy_gpio);
  53         irqs[0].irq = gpio_to_irq(pdata->cd_gpio);
  54
  55         if (gpio_request(pdata->cd_gpio, "CF detect"))
  56                 goto err_request_cd;
  57
  58         if (gpio_request(pdata->rdy_gpio, "CF ready"))
  59                 goto err_request_rdy;
  60
  61         if (gpio_request(pdata->pwr_gpio, "CF power"))
  62                 goto err_request_pwr;
  63
  64         local_irq_save(flags);
  65
  66         if (gpio_direction_output(pdata->pwr_gpio, 0) ||
  67             gpio_direction_input(pdata->cd_gpio) ||
  68             gpio_direction_input(pdata->rdy_gpio)) {
  69                 local_irq_restore(flags);
  70                 goto err_dir;
  71         }
  72
  73         local_irq_restore(flags);
  74
  75         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  76
  77 err_dir:
  78         gpio_free(pdata->pwr_gpio);
  79 err_request_pwr:
  80         gpio_free(pdata->rdy_gpio);
  81 err_request_rdy:
  82         gpio_free(pdata->cd_gpio);
  83 err_request_cd:
  84         dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n");
  85         return -1;
  86 }
  87
  88 /*
  89  * Release all resources.
  90  */
  91 static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  92 {
  93         struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
  94
  95         soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  96         gpio_free(pdata->pwr_gpio);
  97         gpio_free(pdata->rdy_gpio);
  98         gpio_free(pdata->cd_gpio);
  99 }
 100
 101 static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 102                                       struct pcmcia_state *state)
 103 {
 104         struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
 105
 106         state->detect = !gpio_get_value(pdata->cd_gpio);
 107         state->ready  = !!gpio_get_value(pdata->rdy_gpio);
 108         state->bvd1   = 1;
 109         state->bvd2   = 1;
 110         state->wrprot = 0;
 111         state->vs_3v  = 1; /* Can only apply 3.3V */
 112         state->vs_Xv  = 0;
 113 }
 114
 115 static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 116                                          const socket_state_t *state)
 117 {
 118         struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
 119
 120         /* Silently ignore Vpp, output enable, speaker enable. */
 121         pdata->reset(state->flags & SS_RESET);
 122
 123         /* Apply socket voltage */
 124         switch (state->Vcc) {
 125         case 0:
 126                 gpio_set_value(pdata->pwr_gpio, 0);
 127                 break;
 128         case 33:
 129                 gpio_set_value(pdata->pwr_gpio, 1);
 130                 break;
 131         default:
 132                 dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc);
 133                 return -1;
 134         }
 135
 136         return 0;
 137 }
 138
 139 static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 140 {
 141 }
 142
 143 static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 144 {
 145 }
 146
 147 static struct pcmcia_low_level viper_pcmcia_ops = {
 148         .owner                  = THIS_MODULE,
 149         .hw_init                = viper_pcmcia_hw_init,
 150         .hw_shutdown            = viper_pcmcia_hw_shutdown,
 151         .socket_state           = viper_pcmcia_socket_state,
 152         .configure_socket       = viper_pcmcia_configure_socket,
 153         .socket_init            = viper_pcmcia_socket_init,
 154         .socket_suspend         = viper_pcmcia_socket_suspend,
 155         .nr                     = 1,
 156 };
 157
 158 static struct platform_device *viper_pcmcia_device;
 159
 160 static int viper_pcmcia_probe(struct platform_device *pdev)
 161 {
 162         int ret;
 163
 164         /* I can't imagine more than one device, but you never know... */
 165         if (arcom_pcmcia_dev)
 166                 return -EEXIST;
 167
 168         if (!pdev->dev.platform_data)
 169                 return -EINVAL;
 170
 171         viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 172         if (!viper_pcmcia_device)
 173                 return -ENOMEM;
 174
 175         arcom_pcmcia_dev = pdev;
 176
 177         viper_pcmcia_device->dev.parent = &pdev->dev;
 178
 179         ret = platform_device_add_data(viper_pcmcia_device,
 180                                        &viper_pcmcia_ops,
 181                                        sizeof(viper_pcmcia_ops));
 182
 183         if (!ret)
 184                 ret = platform_device_add(viper_pcmcia_device);
 185
 186         if (ret) {
 187                 platform_device_put(viper_pcmcia_device);
 188                 arcom_pcmcia_dev = NULL;
 189         }
 190
 191         return ret;
 192 }
 193
 194 static int viper_pcmcia_remove(struct platform_device *pdev)
 195 {
 196         platform_device_unregister(viper_pcmcia_device);
 197         arcom_pcmcia_dev = NULL;
 198         return 0;
 199 }
 200
 201 static struct platform_device_id viper_pcmcia_id_table[] = {
 202         { .name = "viper-pcmcia", },
 203         { .name = "zeus-pcmcia",  },
 204         { },
 205 };
 206
 207 static struct platform_driver viper_pcmcia_driver = {
 208         .probe          = viper_pcmcia_probe,
 209         .remove         = viper_pcmcia_remove,
 210         .driver         = {
 211                 .name   = "arcom-pcmcia",
 212                 .owner  = THIS_MODULE,
 213         },
 214         .id_table       = viper_pcmcia_id_table,
 215 };
 216
 217 static int __init viper_pcmcia_init(void)
 218 {
 219         return platform_driver_register(&viper_pcmcia_driver);
 220 }
 221
 222 static void __exit viper_pcmcia_exit(void)
 223 {
 224         return platform_driver_unregister(&viper_pcmcia_driver);
 225 }
 226
 227 module_init(viper_pcmcia_init);
 228 module_exit(viper_pcmcia_exit);
 229
 230 MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
 231 MODULE_LICENSE("GPL");