/*
   * linux/drivers/pcmcia/pxa2xx_mainstone.c
   *
   * Mainstone PCMCIA specific routines.
   *
   * Created:	May 12, 2004
   * Author:	Nicolas Pitre
   * Copyright:	MontaVista Software Inc.
   *
   * 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/errno.h>
  #include <linux/interrupt.h>

  #include <linux/platform_device.h>

  
  #include <pcmcia/ss.h>

  #include <asm/mach-types.h>

  #include <asm/irq.h>

  #include <mach/pxa2xx-regs.h>

  #include <mach/mainstone.h>

  
  #include "soc_common.h"
  
  
  static struct pcmcia_irqs irqs[] = {
  	{ 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
  	{ 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
  	{ 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
  	{ 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
  };
  
  static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {
  	/*
  	 * Setup default state of GPIO outputs
  	 * before we enable them as outputs.
  	 */

  	skt->socket.pci_irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;

  	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static unsigned long mst_pcmcia_status[2];
  
  static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  				    struct pcmcia_state *state)
  {
  	unsigned long status, flip;
  
  	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
  	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
  
  	/*
  	 * Workaround for STSCHG which can't be deasserted:
  	 * We therefore disable/enable corresponding IRQs
  	 * as needed to avoid IRQ locks.
  	 */
  	if (flip) {
  		mst_pcmcia_status[skt->nr] = status;
  		if (status & MST_PCMCIA_nSTSCHG_BVD1)
  			enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
  						   : MAINSTONE_S1_STSCHG_IRQ );
  		else
  			disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
  						    : MAINSTONE_S1_STSCHG_IRQ );
  	}
  
  	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
  	state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
  	state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
  	state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
  	state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;
  	state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;
  	state->wrprot = 0;  /* not available */
  }
  
  static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  				       const socket_state_t *state)
  {
  	unsigned long power = 0;
  	int ret = 0;
  
  	switch (state->Vcc) {
  	case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;
  	case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
  	case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
  	default:
  		 printk(KERN_ERR "%s(): bad Vcc %u
  ",

  				 __func__, state->Vcc);

  		 ret = -1;
  	}
  
  	switch (state->Vpp) {
  	case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;
  	case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
  	default:
  		  if(state->Vpp == state->Vcc) {
  			  power |= MST_PCMCIA_PWR_VPP_VCC;
  		  } else {
  			  printk(KERN_ERR "%s(): bad Vpp %u
  ",

  					  __func__, state->Vpp);

  			  ret = -1;
  		  }
  	}
  
  	if (state->flags & SS_RESET)
  	       power |= MST_PCMCIA_RESET;
  
  	switch (skt->nr) {
  	case 0:  MST_PCMCIA0 = power; break;
  	case 1:  MST_PCMCIA1 = power; break;
  	default: ret = -1;
  	}
  
  	return ret;
  }

  static struct pcmcia_low_level mst_pcmcia_ops __initdata = {

  	.owner			= THIS_MODULE,
  	.hw_init		= mst_pcmcia_hw_init,
  	.hw_shutdown		= mst_pcmcia_hw_shutdown,
  	.socket_state		= mst_pcmcia_socket_state,
  	.configure_socket	= mst_pcmcia_configure_socket,

  	.nr			= 2,
  };
  
  static struct platform_device *mst_pcmcia_device;
  
  static int __init mst_pcmcia_init(void)
  {
  	int ret;

  	if (!machine_is_mainstone())
  		return -ENODEV;

  	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);

  	if (!mst_pcmcia_device)
  		return -ENOMEM;

  	ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
  				       sizeof(mst_pcmcia_ops));
  	if (ret == 0)
  		ret = platform_device_add(mst_pcmcia_device);

  	if (ret)

  		platform_device_put(mst_pcmcia_device);

  
  	return ret;
  }
  
  static void __exit mst_pcmcia_exit(void)
  {

  	platform_device_unregister(mst_pcmcia_device);
  }

  fs_initcall(mst_pcmcia_init);

  module_exit(mst_pcmcia_exit);
  
  MODULE_LICENSE("GPL");

  MODULE_ALIAS("platform:pxa2xx-pcmcia");