/*
   * linux/drivers/pcmcia/pxa2xx_stargate2.c
   *
   * Stargate 2 PCMCIA specific routines.
   *
   * Created:	December 6, 2005
   * Author:	Ed C. Epp
   * Copyright:	Intel Corp 2005
   *              Jonathan Cameron <jic23@cam.ac.uk> 2009
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include <linux/module.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/interrupt.h>
  #include <linux/delay.h>
  #include <linux/platform_device.h>
  #include <linux/gpio.h>
  
  #include <pcmcia/ss.h>
  
  #include <asm/irq.h>
  #include <asm/mach-types.h>
  
  #include "soc_common.h"

  #define SG2_S0_POWER_CTL	108
  #define SG2_S0_GPIO_RESET	82
  #define SG2_S0_GPIO_DETECT	53
  #define SG2_S0_GPIO_READY	81
  
  static struct pcmcia_irqs irqs[] = {

  	{.sock = 0, .str = "PCMCIA0 CD" },

  };

  static struct gpio sg2_pcmcia_gpios[] = {
  	{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
  	{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
  };

  static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {

  	skt->socket.pci_irq = gpio_to_irq(SG2_S0_GPIO_READY);
  	irqs[0].irq = gpio_to_irq(SG2_S0_GPIO_DETECT);

  	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  				    struct pcmcia_state *state)
  {
  	state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
  	state->ready  = !!gpio_get_value(SG2_S0_GPIO_READY);
  	state->bvd1   = 0; /* not available - battery detect on card */
  	state->bvd2   = 0; /* not available */
  	state->vs_3v  = 1; /* not available - voltage detect for card */
  	state->vs_Xv  = 0; /* not available */
  	state->wrprot = 0; /* not available - write protect */
  }
  
  static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				       const socket_state_t *state)
  {
  	/* Enable card power */
  	switch (state->Vcc) {
  	case 0:
  		/* sets power ctl register high */
  		gpio_set_value(SG2_S0_POWER_CTL, 1);
  		break;
  	case 33:
  	case 50:
  		/* sets power control register low (clear) */
  		gpio_set_value(SG2_S0_POWER_CTL, 0);
  		msleep(100);
  		break;
  	default:
  		pr_err("%s(): bad Vcc %u
  ",
  		       __func__, state->Vcc);
  		return -1;
  	}
  
  	/* reset */
  	gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
  
  	return 0;
  }
  
  static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
  	.owner			= THIS_MODULE,
  	.hw_init		= sg2_pcmcia_hw_init,
  	.hw_shutdown		= sg2_pcmcia_hw_shutdown,
  	.socket_state		= sg2_pcmcia_socket_state,
  	.configure_socket	= sg2_pcmcia_configure_socket,
  	.socket_init		= sg2_pcmcia_socket_init,
  	.socket_suspend		= sg2_pcmcia_socket_suspend,
  	.nr			= 1,
  };
  
  static struct platform_device *sg2_pcmcia_device;
  
  static int __init sg2_pcmcia_init(void)
  {
  	int ret;
  
  	if (!machine_is_stargate2())
  		return -ENODEV;
  
  	sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  	if (!sg2_pcmcia_device)
  		return -ENOMEM;

  	ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));

  	if (ret)
  		goto error_put_platform_device;

  
  	ret = platform_device_add_data(sg2_pcmcia_device,
  				       &sg2_pcmcia_ops,
  				       sizeof(sg2_pcmcia_ops));
  	if (ret)

  		goto error_free_gpios;

  
  	ret = platform_device_add(sg2_pcmcia_device);
  	if (ret)

  		goto error_free_gpios;

  
  	return 0;

  error_free_gpios:
  	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));

  error_put_platform_device:
  	platform_device_put(sg2_pcmcia_device);
  
  	return ret;
  }
  
  static void __exit sg2_pcmcia_exit(void)
  {
  	platform_device_unregister(sg2_pcmcia_device);

  	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));

  }
  
  fs_initcall(sg2_pcmcia_init);
  module_exit(sg2_pcmcia_exit);
  
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:pxa2xx-pcmcia");