Viewing file:  sa1100_simpad.c (3.24 KB) -rw-r--r--
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/*
* drivers/pcmcia/sa1100_simpad.c
*
* PCMCIA implementation routines for simpad
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
extern long get_cs3_shadow(void);
extern void set_cs3_bit(int value);
extern void clear_cs3_bit(int value);
static int simpad_pcmcia_init(struct pcmcia_init *init){
int irq, res;
/* set GPIO_CF_CD & GPIO_CF_IRQ as inputs */
GPDR &= ~(GPIO_CF_CD|GPIO_CF_IRQ);
set_cs3_bit(PCMCIA_RESET);
clear_cs3_bit(PCMCIA_BUFF_DIS);
clear_cs3_bit(PCMCIA_RESET);
clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
/* Set transition detect */
set_GPIO_IRQ_edge( GPIO_CF_CD, GPIO_BOTH_EDGES );
set_GPIO_IRQ_edge( GPIO_CF_IRQ, GPIO_FALLING_EDGE );
/* Register interrupts */
irq = IRQ_GPIO_CF_CD;
res = request_irq( irq, init->handler, SA_INTERRUPT, "CF_CD", 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 simpad_pcmcia_shutdown(void)
{
/* disable IRQs */
free_irq( IRQ_GPIO_CF_CD, NULL );
/* Disable CF bus: */
//set_cs3_bit(PCMCIA_BUFF_DIS);
clear_cs3_bit(PCMCIA_RESET);
return 0;
}
static int simpad_pcmcia_socket_state(struct pcmcia_state_array
*state_array)
{
unsigned long levels;
unsigned long *cs3reg = CS3_BASE;
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 & GPIO_CF_CD)==0)?1:0;
state_array->state[1].ready=(levels & GPIO_CF_IRQ)?1:0;
state_array->state[1].bvd1=1; /* Not available on Simpad. */
state_array->state[1].bvd2=1; /* Not available on Simpad. */
state_array->state[1].wrprot=0; /* Not available on Simpad. */
if((*cs3reg & 0x0c) == 0x0c) {
state_array->state[1].vs_3v=0;
state_array->state[1].vs_Xv=0;
} else
{
state_array->state[1].vs_3v=1;
state_array->state[1].vs_Xv=0;
}
return 1;
}
static int simpad_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
if(info->sock>1) return -1;
if(info->sock==1)
info->irq=IRQ_GPIO_CF_IRQ;
return 0;
}
static int simpad_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);
/* Murphy: see table of MIC2562a-1 */
switch(configure->vcc){
case 0:
clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
break;
case 33:
clear_cs3_bit(VCC_3V_EN|EN0);
set_cs3_bit(VCC_5V_EN|EN1);
break;
case 50:
clear_cs3_bit(VCC_5V_EN|EN1);
set_cs3_bit(VCC_3V_EN|EN0);
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
restore_flags(flags);
return -1;
}
/* Silently ignore Vpp, output enable, speaker enable. */
restore_flags(flags);
return 0;
}
struct pcmcia_low_level simpad_pcmcia_ops = {
simpad_pcmcia_init,
simpad_pcmcia_shutdown,
simpad_pcmcia_socket_state,
simpad_pcmcia_get_irq_info,
simpad_pcmcia_configure_socket
};
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