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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/arch/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",
__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\n", __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 __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;
}
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