/*
   * linux/drivers/pcmcia/pxa2xx_vpac270.c
   *
   * Driver for Voipac PXA270 PCMCIA and CF sockets
   *

   * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>

   *
   * 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/gpio.h>

  #include <linux/module.h>
  #include <linux/platform_device.h>
  
  #include <asm/mach-types.h>

  #include <asm/gpio.h>

  #include <mach/vpac270.h>
  
  #include "soc_common.h"

  static struct gpio vpac270_pcmcia_gpios[] = {
  	{ GPIO84_VPAC270_PCMCIA_CD,	GPIOF_IN,	"PCMCIA Card Detect" },
  	{ GPIO35_VPAC270_PCMCIA_RDY,	GPIOF_IN,	"PCMCIA Ready" },
  	{ GPIO107_VPAC270_PCMCIA_PPEN,	GPIOF_INIT_LOW,	"PCMCIA PPEN" },
  	{ GPIO11_VPAC270_PCMCIA_RESET,	GPIOF_INIT_LOW,	"PCMCIA Reset" },
  };
  
  static struct gpio vpac270_cf_gpios[] = {
  	{ GPIO17_VPAC270_CF_CD,		GPIOF_IN,	"CF Card Detect" },
  	{ GPIO12_VPAC270_CF_RDY,	GPIOF_IN,	"CF Ready" },
  	{ GPIO16_VPAC270_CF_RESET,	GPIOF_INIT_LOW,	"CF Reset" },
  };

  static struct pcmcia_irqs cd_irqs[] = {
  	{
  		.sock = 0,

  		.str  = "PCMCIA CD"
  	},
  	{
  		.sock = 1,

  		.str  = "CF CD"
  	},
  };
  
  static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {
  	int ret;
  
  	if (skt->nr == 0) {

  		ret = gpio_request_array(vpac270_pcmcia_gpios,
  				ARRAY_SIZE(vpac270_pcmcia_gpios));

  
  		skt->socket.pci_irq = gpio_to_irq(GPIO35_VPAC270_PCMCIA_RDY);

  		cd_irqs[0].irq = gpio_to_irq(GPIO84_VPAC270_PCMCIA_CD);

  		if (!ret)
  			ret = soc_pcmcia_request_irqs(skt, &cd_irqs[0], 1);

  	} else {

  		ret = gpio_request_array(vpac270_cf_gpios,
  				ARRAY_SIZE(vpac270_cf_gpios));

  
  		skt->socket.pci_irq = gpio_to_irq(GPIO12_VPAC270_CF_RDY);

  		cd_irqs[1].irq = gpio_to_irq(GPIO17_VPAC270_CF_CD);

  		if (!ret)
  			ret = soc_pcmcia_request_irqs(skt, &cd_irqs[1], 1);

  	}

  
  	return ret;

  }
  
  static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {

  	if (skt->nr == 0)

  		gpio_free_array(vpac270_pcmcia_gpios,

  					ARRAY_SIZE(vpac270_pcmcia_gpios));
  	else

  		gpio_free_array(vpac270_cf_gpios,

  					ARRAY_SIZE(vpac270_cf_gpios));

  }
  
  static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  					struct pcmcia_state *state)
  {
  	if (skt->nr == 0) {
  		state->detect = !gpio_get_value(GPIO84_VPAC270_PCMCIA_CD);
  		state->ready  = !!gpio_get_value(GPIO35_VPAC270_PCMCIA_RDY);
  	} else {
  		state->detect = !gpio_get_value(GPIO17_VPAC270_CF_CD);
  		state->ready  = !!gpio_get_value(GPIO12_VPAC270_CF_RDY);
  	}
  	state->bvd1   = 1;
  	state->bvd2   = 1;
  	state->wrprot = 0;
  	state->vs_3v  = 1;
  	state->vs_Xv  = 0;
  }
  
  static int
  vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				const socket_state_t *state)
  {
  	if (skt->nr == 0) {
  		gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
  			(state->flags & SS_RESET));
  		gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
  			!(state->Vcc == 33 || state->Vcc == 50));
  	} else {
  		gpio_set_value(GPIO16_VPAC270_CF_RESET,
  			(state->flags & SS_RESET));
  	}
  
  	return 0;
  }
  
  static void vpac270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  {
  }
  
  static void vpac270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  {
  }
  
  static struct pcmcia_low_level vpac270_pcmcia_ops = {
  	.owner			= THIS_MODULE,
  
  	.first			= 0,
  	.nr			= 2,
  
  	.hw_init		= vpac270_pcmcia_hw_init,
  	.hw_shutdown		= vpac270_pcmcia_hw_shutdown,
  
  	.socket_state		= vpac270_pcmcia_socket_state,
  	.configure_socket	= vpac270_pcmcia_configure_socket,
  
  	.socket_init		= vpac270_pcmcia_socket_init,
  	.socket_suspend		= vpac270_pcmcia_socket_suspend,
  };
  
  static struct platform_device *vpac270_pcmcia_device;
  
  static int __init vpac270_pcmcia_init(void)
  {
  	int ret;
  
  	if (!machine_is_vpac270())
  		return -ENODEV;
  
  	vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
  	if (!vpac270_pcmcia_device)
  		return -ENOMEM;
  
  	ret = platform_device_add_data(vpac270_pcmcia_device,
  		&vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
  
  	if (!ret)
  		ret = platform_device_add(vpac270_pcmcia_device);
  
  	if (ret)
  		platform_device_put(vpac270_pcmcia_device);
  
  	return ret;
  }
  
  static void __exit vpac270_pcmcia_exit(void)
  {
  	platform_device_unregister(vpac270_pcmcia_device);
  }
  
  module_init(vpac270_pcmcia_init);
  module_exit(vpac270_pcmcia_exit);
  
  MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
  MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
  MODULE_ALIAS("platform:pxa2xx-pcmcia");
  MODULE_LICENSE("GPL");