Viewing file:  sa1100_cerf.c (3.13 KB) -rw-r--r--
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/*
* drivers/pcmcia/sa1100_cerf.c
*
* PCMCIA implementation routines for CerfBoard
* Based off the Assabet.
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
static int cerf_pcmcia_init(struct pcmcia_init *init){
int irq, res;
GPDR &= ~(GPIO_CF_CD | GPIO_CF_BVD2 | GPIO_CF_BVD1 | GPIO_CF_IRQ);
GPDR |= (GPIO_CF_RESET);
set_GPIO_IRQ_edge( GPIO_CF_CD|GPIO_CF_BVD2|GPIO_CF_BVD1, GPIO_BOTH_EDGES );
set_GPIO_IRQ_edge( GPIO_CF_IRQ, GPIO_FALLING_EDGE );
irq = IRQ_GPIO_CF_CD;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", NULL );
if( res < 0 ) goto irq_err;
irq = IRQ_GPIO_CF_BVD2;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_BVD2", NULL );
if( res < 0 ) goto irq_err;
irq = IRQ_GPIO_CF_BVD1;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL );
if( res < 0 ) goto irq_err;
return 2;
irq_err:
printk( KERN_ERR "%s: Request for IRQ %lu failed\n", __FUNCTION__, irq );
return -1;
}
static int cerf_pcmcia_shutdown(void)
{
free_irq( IRQ_GPIO_CF_CD, NULL );
free_irq( IRQ_GPIO_CF_BVD2, NULL );
free_irq( IRQ_GPIO_CF_BVD1, NULL );
return 0;
}
static int cerf_pcmcia_socket_state(struct pcmcia_state_array
*state_array){
unsigned long levels;
#ifdef CONFIG_SA1100_CERF_CPLD
int i = 0;
#else
int i = 1;
#endif
if(state_array->size<2) return -1;
memset(state_array->state, 0,
(state_array->size)*sizeof(struct pcmcia_state));
levels=GPLR;
state_array->state[i].detect=((levels & GPIO_CF_CD)==0)?1:0;
state_array->state[i].ready=(levels & GPIO_CF_IRQ)?1:0;
state_array->state[i].bvd1=(levels & GPIO_CF_BVD1)?1:0;
state_array->state[i].bvd2=(levels & GPIO_CF_BVD2)?1:0;
state_array->state[i].wrprot=0;
state_array->state[i].vs_3v=1;
state_array->state[i].vs_Xv=0;
return 1;
}
static int cerf_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
if(info->sock>1) return -1;
#ifdef CONFIG_SA1100_CERF_CPLD
if(info->sock==0)
#else
if(info->sock==1)
#endif
info->irq=IRQ_GPIO_CF_IRQ;
return 0;
}
static int cerf_pcmcia_configure_socket(const struct pcmcia_configure
*configure)
{
unsigned long flags;
if(configure->sock>1)
return -1;
#ifdef CONFIG_SA1100_CERF_CPLD
if(configure->sock==1)
#else
if(configure->sock==0)
#endif
return 0;
save_flags_cli(flags);
switch(configure->vcc){
case 0:
break;
case 50:
case 33:
#ifdef CONFIG_SA1100_CERF_CPLD
GPDR |= GPIO_PWR_SHUTDOWN;
GPCR |= GPIO_PWR_SHUTDOWN;
#endif
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
restore_flags(flags);
return -1;
}
if(configure->reset)
{
#ifdef CONFIG_SA1100_CERF_CPLD
GPDR |= GPIO_CF_RESET;
GPSR |= GPIO_CF_RESET;
#endif
}
else
{
#ifdef CONFIG_SA1100_CERF_CPLD
GPDR |= GPIO_CF_RESET;
GPCR |= GPIO_CF_RESET;
#endif
}
restore_flags(flags);
return 0;
}
struct pcmcia_low_level cerf_pcmcia_ops = {
cerf_pcmcia_init,
cerf_pcmcia_shutdown,
cerf_pcmcia_socket_state,
cerf_pcmcia_get_irq_info,
cerf_pcmcia_configure_socket
};
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