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/*
* drivers/pcmcia/sa1100_graphicsclient.c
*
* PCMCIA implementation routines for Graphics Client Plus
*
* 9/12/01 Woojung
* Turn power OFF at startup
* 1/31/2001 Woojung Huh
* Fix for GC Plus PCMCIA Reset Problem
* 2/27/2001 Woojung Huh [whuh@applieddata.net]
* Fix
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
#define S0_CD_IRQ 60 // Socket 0 Card Detect IRQ
#define S0_STS_IRQ 55 // Socket 0 PCMCIA IRQ
static volatile unsigned long *PCMCIA_Status =
((volatile unsigned long *) ADS_p2v(_ADS_CS_STATUS));
static volatile unsigned long *PCMCIA_Power =
((volatile unsigned long *) ADS_p2v(_ADS_CS_PR));
static int gcplus_pcmcia_init(struct pcmcia_init *init)
{
int irq, res;
// Reset PCMCIA
// Reset Timing for CPLD(U2) version 8001E or later
*PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
udelay(12); // 12 uSec
*PCMCIA_Power |= ADS_CS_PR_A_RESET;
mdelay(30); // 30 mSec
// Turn off 5V
*PCMCIA_Power &= ~0x03;
/* Register interrupts */
irq = S0_CD_IRQ;
res = request_irq(irq, init->handler, SA_INTERRUPT, "PCMCIA 0 CD", NULL);
if (res < 0) {
printk(KERN_ERR "%s: Request for IRQ %lu failed\n", __FUNCTION__, irq);
return -1;
}
return 1; // 1 PCMCIA Slot
}
static int gcplus_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( S0_CD_IRQ, NULL);
/* Shutdown PCMCIA power */
mdelay(2); // 2msec
*PCMCIA_Power &= ~0x03;
return 0;
}
static int gcplus_pcmcia_socket_state(struct pcmcia_state_array
*state_array){
unsigned long levels;
if(state_array->size<1) return -1;
memset(state_array->state, 0,
(state_array->size)*sizeof(struct pcmcia_state));
levels=*PCMCIA_Status;
state_array->state[0].detect=(levels & ADS_CS_ST_A_CD)?1:0;
state_array->state[0].ready=(levels & ADS_CS_ST_A_READY)?1:0;
state_array->state[0].bvd1= 0;
state_array->state[0].bvd2= 0;
state_array->state[0].wrprot=0;
state_array->state[0].vs_3v=0;
state_array->state[0].vs_Xv=0;
return 1;
}
static int gcplus_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
{
if (info->sock > 1)
return -1;
if (info->sock == 0)
info->irq = S0_STS_IRQ;
return 0;
}
static int gcplus_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:
*PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
break;
case 50:
*PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
*PCMCIA_Power |= ADS_CS_PR_A_5V_POWER;
break;
case 33:
*PCMCIA_Power &= ~(ADS_CS_PR_A_3V_POWER | ADS_CS_PR_A_5V_POWER);
*PCMCIA_Power |= ADS_CS_PR_A_3V_POWER;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
restore_flags(flags);
return -1;
}
/* Silently ignore Vpp, output enable, speaker enable. */
// Reset PCMCIA
*PCMCIA_Power &= ~ ADS_CS_PR_A_RESET;
udelay(12);
*PCMCIA_Power |= ADS_CS_PR_A_RESET;
mdelay(30);
restore_flags(flags);
return 0;
}
struct pcmcia_low_level gcplus_pcmcia_ops = {
gcplus_pcmcia_init,
gcplus_pcmcia_shutdown,
gcplus_pcmcia_socket_state,
gcplus_pcmcia_get_irq_info,
gcplus_pcmcia_configure_socket
};
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