/*
   * drivers/pcmcia/sa1100_assabet.c
   *
   * PCMCIA implementation routines for Assabet
   *
   */
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/errno.h>
  #include <linux/interrupt.h>
  #include <linux/device.h>
  #include <linux/init.h>

  #include <mach/hardware.h>

  #include <asm/mach-types.h>
  #include <asm/irq.h>
  #include <asm/signal.h>

  #include <mach/assabet.h>

  
  #include "sa1100_generic.h"
  
  static struct pcmcia_irqs irqs[] = {
  	{ 1, ASSABET_IRQ_GPIO_CF_CD,   "CF CD"   },
  	{ 1, ASSABET_IRQ_GPIO_CF_BVD2, "CF BVD2" },
  	{ 1, ASSABET_IRQ_GPIO_CF_BVD1, "CF BVD1" },
  };
  
  static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {

  	skt->socket.pci_irq = ASSABET_IRQ_GPIO_CF_IRQ;

  
  	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  /*
   * Release all resources.
   */
  static void assabet_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  static void
  assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  {
  	unsigned long levels = GPLR;
  
  	state->detect = (levels & ASSABET_GPIO_CF_CD) ? 0 : 1;
  	state->ready  = (levels & ASSABET_GPIO_CF_IRQ) ? 1 : 0;
  	state->bvd1   = (levels & ASSABET_GPIO_CF_BVD1) ? 1 : 0;
  	state->bvd2   = (levels & ASSABET_GPIO_CF_BVD2) ? 1 : 0;
  	state->wrprot = 0; /* Not available on Assabet. */
  	state->vs_3v  = 1; /* Can only apply 3.3V on Assabet. */
  	state->vs_Xv  = 0;
  }
  
  static int
  assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  {
  	unsigned int mask;
  
  	switch (state->Vcc) {
  	case 0:
  		mask = 0;
  		break;
  
  	case 50:
  		printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...
  ",

  			__func__);

  
  	case 33:  /* Can only apply 3.3V to the CF slot. */
  		mask = ASSABET_BCR_CF_PWR;
  		break;
  
  	default:

  		printk(KERN_ERR "%s(): unrecognized Vcc %u
  ", __func__,

  			state->Vcc);
  		return -1;
  	}
  
  	/* Silently ignore Vpp, output enable, speaker enable. */
  
  	if (state->flags & SS_RESET)
  		mask |= ASSABET_BCR_CF_RST;
  
  	ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR, mask);
  
  	return 0;
  }
  
  /*
   * Enable card status IRQs on (re-)initialisation.  This can
   * be called at initialisation, power management event, or
   * pcmcia event.
   */
  static void assabet_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  {
  	/*
  	 * Enable CF bus
  	 */
  	ASSABET_BCR_clear(ASSABET_BCR_CF_BUS_OFF);
  
  	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  }
  
  /*
   * Disable card status IRQs on suspend.
   */
  static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  {
  	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  
  	/*
  	 * Tristate the CF bus signals.  Also assert CF
  	 * reset as per user guide page 4-11.
  	 */
  	ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
  }
  
  static struct pcmcia_low_level assabet_pcmcia_ops = { 
  	.owner			= THIS_MODULE,
  
  	.hw_init		= assabet_pcmcia_hw_init,
  	.hw_shutdown		= assabet_pcmcia_hw_shutdown,
  
  	.socket_state		= assabet_pcmcia_socket_state,
  	.configure_socket	= assabet_pcmcia_configure_socket,
  
  	.socket_init		= assabet_pcmcia_socket_init,
  	.socket_suspend		= assabet_pcmcia_socket_suspend,
  };

  int __devinit pcmcia_assabet_init(struct device *dev)

  {
  	int ret = -ENODEV;
  
  	if (machine_is_assabet() && !machine_has_neponset())
  		ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
  
  	return ret;
  }