Viewing file:  sa1100_h3600.c (3.5 KB) -rw-r--r--
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/*
* drivers/pcmcia/sa1100_h3600.c
*
* PCMCIA implementation routines for H3600
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
static int h3600_pcmcia_init(struct pcmcia_init *init){
int irq, res;
/* Enable CF bus: */
set_h3600_egpio(EGPIO_H3600_OPT_NVRAM_ON);
clr_h3600_egpio(EGPIO_H3600_OPT_RESET);
/* All those are inputs */
GPDR &= ~(GPIO_H3600_PCMCIA_CD0 | GPIO_H3600_PCMCIA_CD1 | GPIO_H3600_PCMCIA_IRQ0| GPIO_H3600_PCMCIA_IRQ1);
/* Set transition detect */
set_GPIO_IRQ_edge( GPIO_H3600_PCMCIA_CD0 | GPIO_H3600_PCMCIA_CD1, GPIO_BOTH_EDGES );
set_GPIO_IRQ_edge( GPIO_H3600_PCMCIA_IRQ0| GPIO_H3600_PCMCIA_IRQ1, GPIO_FALLING_EDGE );
/* Register interrupts */
irq = IRQ_GPIO_H3600_PCMCIA_CD0;
res = request_irq( irq, init->handler, SA_INTERRUPT, "PCMCIA_CD0", NULL );
if( res < 0 ) goto irq_err;
irq = IRQ_GPIO_H3600_PCMCIA_CD1;
res = request_irq( irq, init->handler, SA_INTERRUPT, "PCMCIA_CD1", NULL );
if( res < 0 ) goto irq_err;
return 2;
irq_err:
printk( KERN_ERR __FUNCTION__ ": Request for IRQ %u failed\n", irq );
return -1;
}
static int h3600_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( IRQ_GPIO_H3600_PCMCIA_CD0, NULL );
free_irq( IRQ_GPIO_H3600_PCMCIA_CD1, NULL );
/* Disable CF bus: */
clr_h3600_egpio(EGPIO_H3600_OPT_NVRAM_ON|EGPIO_H3600_OPT_ON);
set_h3600_egpio(EGPIO_H3600_OPT_RESET);
return 0;
}
static int h3600_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[0].detect=((levels & GPIO_H3600_PCMCIA_CD0)==0)?1:0;
state_array->state[0].ready=(levels & GPIO_H3600_PCMCIA_IRQ0)?1:0;
state_array->state[0].bvd1= 0;
state_array->state[0].bvd2= 0;
state_array->state[0].wrprot=0; /* Not available on H3600. */
state_array->state[0].vs_3v=0;
state_array->state[0].vs_Xv=0;
state_array->state[1].detect=((levels & GPIO_H3600_PCMCIA_CD1)==0)?1:0;
state_array->state[1].ready=(levels & GPIO_H3600_PCMCIA_IRQ1)?1:0;
state_array->state[1].bvd1=0;
state_array->state[1].bvd2=0;
state_array->state[1].wrprot=0; /* Not available on H3600. */
state_array->state[1].vs_3v=0;
state_array->state[1].vs_Xv=0;
return 1;
}
static int h3600_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
switch (info->sock) {
case 0:
info->irq=IRQ_GPIO_H3600_PCMCIA_IRQ0;
break;
case 1:
info->irq=IRQ_GPIO_H3600_PCMCIA_IRQ1;
break;
default:
return -1;
}
return 0;
}
static int h3600_pcmcia_configure_socket(const struct pcmcia_configure
*configure)
{
unsigned long flags;
if(configure->sock>1) return -1;
save_flags_cli(flags);
switch (configure->vcc) {
case 0:
clr_h3600_egpio(EGPIO_H3600_OPT_ON);
break;
case 33:
case 50:
set_h3600_egpio(EGPIO_H3600_OPT_ON);
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
restore_flags(flags);
return -1;
}
if (configure->reset)
set_h3600_egpio(EGPIO_H3600_CARD_RESET);
else
clr_h3600_egpio(EGPIO_H3600_CARD_RESET);
/* Silently ignore Vpp, output enable, speaker enable. */
restore_flags(flags);
return 0;
}
struct pcmcia_low_level h3600_pcmcia_ops = {
h3600_pcmcia_init,
h3600_pcmcia_shutdown,
h3600_pcmcia_socket_state,
h3600_pcmcia_get_irq_info,
h3600_pcmcia_configure_socket
};
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