/*

   * Viper/Zeus PCMCIA support

   *   Copyright 2004 Arcom Control Systems
   *
   * Maintained by Marc Zyngier <maz@misterjones.org>

   *
   * Based on:
   *   iPAQ h2200 PCMCIA support
   *   Copyright 2004 Koen Kooi <koen@vestingbar.nl>
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file COPYING in the main directory of this archive for
   * more details.
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/errno.h>
  #include <linux/interrupt.h>
  #include <linux/platform_device.h>
  #include <linux/gpio.h>
  
  #include <pcmcia/ss.h>
  
  #include <asm/irq.h>

  #include <mach/arcom-pcmcia.h>

  
  #include "soc_common.h"
  #include "pxa2xx_base.h"

  static struct platform_device *arcom_pcmcia_dev;

  static struct pcmcia_irqs irqs[] = {

  	{
  		.sock	= 0,
  		.str	= "PCMCIA_CD",
  	},

  };

  static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
  {
  	return arcom_pcmcia_dev->dev.platform_data;
  }

  static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {

  	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();

  	unsigned long flags;

  	skt->socket.pci_irq = gpio_to_irq(pdata->rdy_gpio);
  	irqs[0].irq = gpio_to_irq(pdata->cd_gpio);

  	if (gpio_request(pdata->cd_gpio, "CF detect"))

  		goto err_request_cd;

  	if (gpio_request(pdata->rdy_gpio, "CF ready"))

  		goto err_request_rdy;

  	if (gpio_request(pdata->pwr_gpio, "CF power"))

  		goto err_request_pwr;
  
  	local_irq_save(flags);

  	if (gpio_direction_output(pdata->pwr_gpio, 0) ||
  	    gpio_direction_input(pdata->cd_gpio) ||
  	    gpio_direction_input(pdata->rdy_gpio)) {

  		local_irq_restore(flags);
  		goto err_dir;
  	}
  
  	local_irq_restore(flags);
  
  	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  
  err_dir:

  	gpio_free(pdata->pwr_gpio);

  err_request_pwr:

  	gpio_free(pdata->rdy_gpio);

  err_request_rdy:

  	gpio_free(pdata->cd_gpio);

  err_request_cd:

  	dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs
  ");

  	return -1;
  }
  
  /*
   * Release all resources.
   */
  static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {

  	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();

  	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));

  	gpio_free(pdata->pwr_gpio);
  	gpio_free(pdata->rdy_gpio);
  	gpio_free(pdata->cd_gpio);

  }
  
  static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  				      struct pcmcia_state *state)
  {

  	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
  
  	state->detect = !gpio_get_value(pdata->cd_gpio);
  	state->ready  = !!gpio_get_value(pdata->rdy_gpio);

  	state->bvd1   = 1;
  	state->bvd2   = 1;
  	state->wrprot = 0;
  	state->vs_3v  = 1; /* Can only apply 3.3V */
  	state->vs_Xv  = 0;
  }
  
  static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  					 const socket_state_t *state)
  {

  	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();

  	/* Silently ignore Vpp, output enable, speaker enable. */

  	pdata->reset(state->flags & SS_RESET);

  
  	/* Apply socket voltage */
  	switch (state->Vcc) {
  	case 0:

  		gpio_set_value(pdata->pwr_gpio, 0);

  		break;
  	case 33:

  		gpio_set_value(pdata->pwr_gpio, 1);

  		break;
  	default:

  		dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d
  ", state->Vcc);

  		return -1;
  	}
  
  	return 0;
  }
  
  static void viper_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  {
  }
  
  static void viper_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  {
  }

  static struct pcmcia_low_level viper_pcmcia_ops = {

  	.owner          	= THIS_MODULE,
  	.hw_init        	= viper_pcmcia_hw_init,
  	.hw_shutdown		= viper_pcmcia_hw_shutdown,
  	.socket_state		= viper_pcmcia_socket_state,
  	.configure_socket	= viper_pcmcia_configure_socket,
  	.socket_init		= viper_pcmcia_socket_init,
  	.socket_suspend		= viper_pcmcia_socket_suspend,
  	.nr         		= 1,
  };
  
  static struct platform_device *viper_pcmcia_device;

  static int viper_pcmcia_probe(struct platform_device *pdev)

  {
  	int ret;

  	/* I can't imagine more than one device, but you never know... */
  	if (arcom_pcmcia_dev)
  		return -EEXIST;
  
  	if (!pdev->dev.platform_data)
  		return -EINVAL;

  
  	viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  	if (!viper_pcmcia_device)
  		return -ENOMEM;

  	arcom_pcmcia_dev = pdev;
  
  	viper_pcmcia_device->dev.parent = &pdev->dev;

  	ret = platform_device_add_data(viper_pcmcia_device,
  				       &viper_pcmcia_ops,
  				       sizeof(viper_pcmcia_ops));
  
  	if (!ret)
  		ret = platform_device_add(viper_pcmcia_device);

  	if (ret) {

  		platform_device_put(viper_pcmcia_device);

  		arcom_pcmcia_dev = NULL;
  	}

  
  	return ret;
  }

  static int viper_pcmcia_remove(struct platform_device *pdev)

  {
  	platform_device_unregister(viper_pcmcia_device);

  	arcom_pcmcia_dev = NULL;
  	return 0;
  }
  
  static struct platform_device_id viper_pcmcia_id_table[] = {
  	{ .name = "viper-pcmcia", },
  	{ .name = "zeus-pcmcia",  },
  	{ },
  };
  
  static struct platform_driver viper_pcmcia_driver = {
  	.probe		= viper_pcmcia_probe,
  	.remove		= viper_pcmcia_remove,
  	.driver		= {
  		.name	= "arcom-pcmcia",
  		.owner	= THIS_MODULE,
  	},
  	.id_table	= viper_pcmcia_id_table,
  };
  
  static int __init viper_pcmcia_init(void)
  {
  	return platform_driver_register(&viper_pcmcia_driver);
  }
  
  static void __exit viper_pcmcia_exit(void)
  {
  	return platform_driver_unregister(&viper_pcmcia_driver);

  }
  
  module_init(viper_pcmcia_init);
  module_exit(viper_pcmcia_exit);

  MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);

  MODULE_LICENSE("GPL");