Viewing file:  sa1100_pfs168.c (5.78 KB) -rw-r--r--
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#warning "REVISIT_PFS168: Need to verify and test GPIO power encodings."
/*
* drivers/pcmcia/sa1100_pfs168.c
*
* PFS168 PCMCIA specific routines
*
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/delay.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/arch/pcmcia.h>
static int pfs168_pcmcia_init(struct pcmcia_init *init){
int return_val=0;
/* TPS2211 to standby mode: */
PA_DWR &= ~(GPIO_GPIO0 | GPIO_GPIO1 | GPIO_GPIO2 | GPIO_GPIO3);
/* Set GPIO_A<3:0> to be outputs for PCMCIA (socket 0) power controller: */
PA_DDR &= ~(GPIO_GPIO0 | GPIO_GPIO1 | GPIO_GPIO2 | GPIO_GPIO3);
INTPOL1 |=
(1 << (S0_READY_NINT - SA1111_IRQ(32))) |
(1 << (S1_READY_NINT - SA1111_IRQ(32))) |
(1 << (S0_CD_VALID - SA1111_IRQ(32))) |
(1 << (S1_CD_VALID - SA1111_IRQ(32))) |
(1 << (S0_BVD1_STSCHG - SA1111_IRQ(32))) |
(1 << (S1_BVD1_STSCHG - SA1111_IRQ(32)));
return_val+=request_irq(S0_CD_VALID, init->handler, SA_INTERRUPT,
"PFS168 PCMCIA (0) CD", NULL);
return_val+=request_irq(S1_CD_VALID, init->handler, SA_INTERRUPT,
"PFS168 CF (1) CD", NULL);
return_val+=request_irq(S0_BVD1_STSCHG, init->handler, SA_INTERRUPT,
"PFS168 PCMCIA (0) BVD1", NULL);
return_val+=request_irq(S1_BVD1_STSCHG, init->handler, SA_INTERRUPT,
"PFS168 CF (1) BVD1", NULL);
return (return_val<0) ? -1 : 2;
}
static int pfs168_pcmcia_shutdown(void){
free_irq(S0_CD_VALID, NULL);
free_irq(S1_CD_VALID, NULL);
free_irq(S0_BVD1_STSCHG, NULL);
free_irq(S1_BVD1_STSCHG, NULL);
INTPOL1 &=
~((1 << (S0_CD_VALID - SA1111_IRQ(32))) |
(1 << (S1_CD_VALID - SA1111_IRQ(32))) |
(1 << (S0_BVD1_STSCHG - SA1111_IRQ(32))) |
(1 << (S1_BVD1_STSCHG - SA1111_IRQ(32))));
return 0;
}
static int pfs168_pcmcia_socket_state(struct pcmcia_state_array
*state_array){
unsigned long status;
int return_val=1;
if(state_array->size<2) return -1;
memset(state_array->state, 0,
(state_array->size)*sizeof(struct pcmcia_state));
status=PCSR;
state_array->state[0].detect=((status & PCSR_S0_DETECT)==0)?1:0;
state_array->state[0].ready=((status & PCSR_S0_READY)==0)?0:1;
state_array->state[0].bvd1=((status & PCSR_S0_BVD1)==0)?0:1;
state_array->state[0].bvd2=((status & PCSR_S0_BVD2)==0)?0:1;
state_array->state[0].wrprot=((status & PCSR_S0_WP)==0)?0:1;
state_array->state[0].vs_3v=((status & PCSR_S0_VS1)==0)?1:0;
state_array->state[0].vs_Xv=((status & PCSR_S0_VS2)==0)?1:0;
state_array->state[1].detect=((status & PCSR_S1_DETECT)==0)?1:0;
state_array->state[1].ready=((status & PCSR_S1_READY)==0)?0:1;
state_array->state[1].bvd1=((status & PCSR_S1_BVD1)==0)?0:1;
state_array->state[1].bvd2=((status & PCSR_S1_BVD2)==0)?0:1;
state_array->state[1].wrprot=((status & PCSR_S1_WP)==0)?0:1;
state_array->state[1].vs_3v=((status & PCSR_S1_VS1)==0)?1:0;
state_array->state[1].vs_Xv=((status & PCSR_S1_VS2)==0)?1:0;
return return_val;
}
static int pfs168_pcmcia_get_irq_info(struct pcmcia_irq_info *info){
switch(info->sock){
case 0:
info->irq=S0_READY_NINT;
break;
case 1:
info->irq=S1_READY_NINT;
break;
default:
return -1;
}
return 0;
}
static int pfs168_pcmcia_configure_socket(const struct pcmcia_configure
*configure){
unsigned long pccr=PCCR, gpio=PA_DWR;
/* PFS168 uses the Texas Instruments TPS2211 for PCMCIA (socket 0) voltage control only,
* with the following connections:
*
* TPS2211 PFS168
*
* -VCCD0 SA-1111 GPIO A<0>
* -VCCD0 SA-1111 GPIO A<1>
* VPPD0 SA-1111 GPIO A<2>
* VPPD0 SA-1111 GPIO A<2>
*
*/
switch(configure->sock){
case 0:
switch(configure->vcc){
case 0:
pccr = (pccr & ~PCCR_S0_FLT);
gpio &= ~(GPIO_GPIO0 | GPIO_GPIO1);
break;
case 33:
pccr = (pccr & ~PCCR_S0_PSE) | PCCR_S0_FLT | PCCR_S0_PWAITEN;
gpio = (gpio & ~(GPIO_GPIO0 | GPIO_GPIO1)) | GPIO_GPIO0;
break;
case 50:
pccr = (pccr | PCCR_S0_PSE | PCCR_S0_FLT | PCCR_S0_PWAITEN);
gpio = (gpio & ~(GPIO_GPIO0 | GPIO_GPIO1)) | GPIO_GPIO1;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
return -1;
}
switch(configure->vpp){
case 0:
gpio &= ~(GPIO_GPIO2 | GPIO_GPIO3);
break;
case 120:
printk(KERN_ERR "%s(): PFS-168 does not support Vpp %uV\n", __FUNCTION__,
configure->vpp/10);
return -1;
break;
default:
if(configure->vpp == configure->vcc)
gpio = (gpio & ~(GPIO_GPIO2 | GPIO_GPIO3)) | GPIO_GPIO3;
else {
printk(KERN_ERR "%s(): unrecognized Vpp %u\n", __FUNCTION__,
configure->vpp);
return -1;
}
}
pccr = (configure->reset)?(pccr | PCCR_S0_RST):(pccr & ~PCCR_S0_RST);
PA_DWR = gpio;
break;
case 1:
switch(configure->vcc){
case 0:
pccr = (pccr & ~PCCR_S1_FLT);
break;
case 33:
pccr = (pccr & ~PCCR_S1_PSE) | PCCR_S1_FLT | PCCR_S1_PWAITEN;
break;
case 50:
printk(KERN_ERR "%s(): PFS-168 CompactFlash socket does not support Vcc %uV\n", __FUNCTION__,
configure->vcc/10);
return -1;
break;
default:
printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __FUNCTION__,
configure->vcc);
return -1;
}
if(configure->vpp!=configure->vcc && configure->vpp!=0){
printk(KERN_ERR "%s(): CompactFlash socket does not support Vpp %uV\n", __FUNCTION__,
configure->vpp/10);
return -1;
}
pccr = (configure->reset)?(pccr | PCCR_S1_RST):(pccr & ~PCCR_S1_RST);
break;
default:
return -1;
}
PCCR = pccr;
return 0;
}
struct pcmcia_low_level pfs168_pcmcia_ops = {
pfs168_pcmcia_init,
pfs168_pcmcia_shutdown,
pfs168_pcmcia_socket_state,
pfs168_pcmcia_get_irq_info,
pfs168_pcmcia_configure_socket
};
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