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/*
 * 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 <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/irq.h>
#include <asm/signal.h>
#include <asm/arch/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->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...\n",
			__FUNCTION__);
 
	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\n", __FUNCTION__,
			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 __init 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;
}