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/*
* drivers/pcmcia/sa1100_freebird.c
*
* Created by Eric Peng <ericpeng@coventive.com>
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
static int freebird_pcmcia_init(struct pcmcia_init *init){
int irq, res;
/* Enable Linkup CF card */
LINKUP_PRC = 0xc0;
mdelay(100);
LINKUP_PRC = 0xc1;
mdelay(100);
LINKUP_PRC = 0xd1;
mdelay(100);
LINKUP_PRC = 0xd1;
mdelay(100);
LINKUP_PRC = 0xc0;
/* All those are inputs */
////GPDR &= ~(GPIO_CF_CD | GPIO_CF_BVD2 | GPIO_CF_BVD1 | GPIO_CF_IRQ);
GPDR &= ~(GPIO_FREEBIRD_CF_CD | GPIO_FREEBIRD_CF_IRQ | GPIO_FREEBIRD_CF_BVD);
/* Set transition detect */
//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 );
set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_CD|GPIO_FREEBIRD_CF_BVD,GPIO_BOTH_EDGES);
set_GPIO_IRQ_edge(GPIO_FREEBIRD_CF_IRQ, GPIO_FALLING_EDGE);
/* Register interrupts */
irq = IRQ_GPIO_FREEBIRD_CF_CD;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", NULL );
if( res < 0 ) goto irq_err;
irq = IRQ_GPIO_FREEBIRD_CF_BVD;
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 %lu failed\n", __FUNCTION__, irq );
return -1;
}
static int freebird_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( IRQ_GPIO_FREEBIRD_CF_CD, NULL );
free_irq( IRQ_GPIO_FREEBIRD_CF_BVD, NULL );
/* Disable CF card */
LINKUP_PRC = 0x40; /* SSP=1 SOE=0 */
mdelay(100);
return 0;
}
static int freebird_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 = LINKUP_PRS;
//printk("LINKUP_PRS=%x \n",levels);
state_array->state[0].detect=
((levels & (LINKUP_CD1 | LINKUP_CD2))==0)?1:0;
state_array->state[0].ready=(levels & LINKUP_RDY)?1:0;
state_array->state[0].bvd1=(levels & LINKUP_BVD1)?1:0;
state_array->state[0].bvd2=(levels & LINKUP_BVD2)?1:0;
state_array->state[0].wrprot=0; /* Not available on Assabet. */
state_array->state[0].vs_3v=1; /* Can only apply 3.3V on Assabet. */
state_array->state[0].vs_Xv=0;
return 1;
}
static int freebird_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
if(info->sock>1) return -1;
if(info->sock==0)
info->irq=IRQ_GPIO_FREEBIRD_CF_IRQ;
return 0;
}
static int freebird_pcmcia_configure_socket(const struct pcmcia_configure
*configure)
{
unsigned long value, flags;
if(configure->sock>1) return -1;
if(configure->sock==1) return 0;
save_flags_cli(flags);
value = 0xc0; /* SSP=1 SOE=1 CFE=1 */
switch(configure->vcc){
case 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. */
value |= LINKUP_S1;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
restore_flags(flags);
return -1;
}
if (configure->reset)
value = (configure->reset) ? (value | LINKUP_RESET) : (value & ~LINKUP_RESET);
/* Silently ignore Vpp, output enable, speaker enable. */
LINKUP_PRC = value;
//printk("LINKUP_PRC=%x\n",value);
restore_flags(flags);
return 0;
}
struct pcmcia_low_level freebird_pcmcia_ops = {
freebird_pcmcia_init,
freebird_pcmcia_shutdown,
freebird_pcmcia_socket_state,
freebird_pcmcia_get_irq_info,
freebird_pcmcia_configure_socket
};
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