Viewing file:  sa1100_assabet.c (3.52 KB) -rw-r--r--
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/*
* drivers/pcmcia/sa1100_assabet.c
*
* PCMCIA implementation routines for Assabet
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
#include <asm/arch/assabet.h>
static int assabet_pcmcia_init(struct pcmcia_init *init){
int irq, res;
/* Enable CF bus: */
ASSABET_BCR_clear(ASSABET_BCR_CF_BUS_OFF);
/* All those are inputs */
GPDR &= ~(ASSABET_GPIO_CF_CD | ASSABET_GPIO_CF_BVD2 | ASSABET_GPIO_CF_BVD1 | ASSABET_GPIO_CF_IRQ);
/* Set transition detect */
set_GPIO_IRQ_edge( ASSABET_GPIO_CF_CD|ASSABET_GPIO_CF_BVD2|ASSABET_GPIO_CF_BVD1, GPIO_BOTH_EDGES );
set_GPIO_IRQ_edge( ASSABET_GPIO_CF_IRQ, GPIO_FALLING_EDGE );
/* Register interrupts */
irq = ASSABET_IRQ_GPIO_CF_CD;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", NULL );
if( res < 0 ) goto irq_err;
irq = ASSABET_IRQ_GPIO_CF_BVD2;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_BVD2", NULL );
if( res < 0 ) goto irq_err;
irq = ASSABET_IRQ_GPIO_CF_BVD1;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_BVD1", NULL );
if( res < 0 ) goto irq_err;
/* There's only one slot, but it's "Slot 1": */
return 2;
irq_err:
printk( KERN_ERR "%s: Request for IRQ %u failed\n", __FUNCTION__, irq );
return -1;
}
static int assabet_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( ASSABET_IRQ_GPIO_CF_CD, NULL );
free_irq( ASSABET_IRQ_GPIO_CF_BVD2, NULL );
free_irq( ASSABET_IRQ_GPIO_CF_BVD1, NULL );
/* Disable CF bus: */
ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF);
return 0;
}
static int assabet_pcmcia_socket_state(struct pcmcia_state_array
*state_array){
unsigned long levels;
if(state_array->size<2) return -1;
memset(state_array->state, 0,
(state_array->size)*sizeof(struct pcmcia_state));
levels=GPLR;
state_array->state[1].detect=((levels & ASSABET_GPIO_CF_CD)==0)?1:0;
state_array->state[1].ready=(levels & ASSABET_GPIO_CF_IRQ)?1:0;
state_array->state[1].bvd1=(levels & ASSABET_GPIO_CF_BVD1)?1:0;
state_array->state[1].bvd2=(levels & ASSABET_GPIO_CF_BVD2)?1:0;
state_array->state[1].wrprot=0; /* Not available on Assabet. */
state_array->state[1].vs_3v=1; /* Can only apply 3.3V on Assabet. */
state_array->state[1].vs_Xv=0;
return 1;
}
static int assabet_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
if(info->sock>1) return -1;
if(info->sock==1)
info->irq=ASSABET_IRQ_GPIO_CF_IRQ;
return 0;
}
static int assabet_pcmcia_configure_socket(const struct pcmcia_configure
*configure)
{
unsigned long value, flags;
if(configure->sock>1) return -1;
if(configure->sock==0) return 0;
save_flags_cli(flags);
value = BCR_value;
switch(configure->vcc){
case 0:
value &= ~ASSABET_BCR_CF_PWR;
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. */
value |= ASSABET_BCR_CF_PWR;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
restore_flags(flags);
return -1;
}
value = (configure->reset) ? (value | ASSABET_BCR_CF_RST) : (value & ~ASSABET_BCR_CF_RST);
/* Silently ignore Vpp, output enable, speaker enable. */
ASSABET_BCR = BCR_value = value;
restore_flags(flags);
return 0;
}
struct pcmcia_low_level assabet_pcmcia_ops = {
assabet_pcmcia_init,
assabet_pcmcia_shutdown,
assabet_pcmcia_socket_state,
assabet_pcmcia_get_irq_info,
assabet_pcmcia_configure_socket
};
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