142 строки
3.3 KiB
C
142 строки
3.3 KiB
C
/*
|
|
* 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;
|
|
}
|