pcmcia.c
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#include <common.h>
#include <mpc8xx.h>
#include <pcmcia.h>
#undef CONFIG_PCMCIA
#if defined(CONFIG_CMD_PCMCIA)
#define CONFIG_PCMCIA
#endif
#if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
#define CONFIG_PCMCIA
#endif
#ifdef CONFIG_PCMCIA
#define PCMCIA_BOARD_MSG "R360MPI"
int pcmcia_hardware_enable(int slot)
{
volatile immap_t *immap;
volatile pcmconf8xx_t *pcmp;
volatile sysconf8xx_t *sysp;
uint reg, mask;
debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
udelay(10000);
immap = (immap_t *)CONFIG_SYS_IMMR;
sysp = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf));
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
/*
* Configure SIUMCR to enable PCMCIA port B
* (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
*/
sysp->sc_siumcr &= ~SIUMCR_DBGC11; /* set DBGC to 00 */
/* clear interrupt state, and disable interrupts */
pcmp->pcmc_pscr = PCMCIA_MASK(_slot_);
pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);
/*
* Disable interrupts, DMA, and PCMCIA buffers
* (isolate the interface) and assert RESET signal
*/
debug ("Disable PCMCIA buffers and assert RESET\n");
reg = 0;
reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
PCMCIA_PGCRX(_slot_) = reg;
udelay(500);
/*
* Configure Ports A, B & C pins for
* 5 Volts Enable and 3 Volts enable
*/
immap->im_ioport.iop_pcpar &= ~(0x0400);
immap->im_ioport.iop_pcso &= ~(0x0400);/*
immap->im_ioport.iop_pcdir |= 0x0400;*/
immap->im_ioport.iop_papar &= ~(0x0200);/*
immap->im_ioport.iop_padir |= 0x0200;*/
#if 0
immap->im_ioport.iop_pbpar &= ~(0xC000);
immap->im_ioport.iop_pbdir &= ~(0xC000);
#endif
/* remove all power */
immap->im_ioport.iop_pcdat |= 0x0400;
immap->im_ioport.iop_padat |= 0x0200;
/*
* Make sure there is a card in the slot, then configure the interface.
*/
udelay(10000);
debug ("[%d] %s: PIPR(%p)=0x%x\n",
__LINE__,__FUNCTION__,
&(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
printf (" No Card found\n");
return (1);
}
/*
* Power On.
*/
mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
reg = pcmp->pcmc_pipr;
debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
reg,
(reg&PCMCIA_VS1(slot))?"n":"ff",
(reg&PCMCIA_VS2(slot))?"n":"ff");
if ((reg & mask) == mask) {
immap->im_ioport.iop_pcdat &= ~(0x4000);
puts (" 5.0V card found: ");
} else {
immap->im_ioport.iop_padat &= ~(0x0002);
puts (" 3.3V card found: ");
}
immap->im_ioport.iop_pcdir |= 0x0400;
immap->im_ioport.iop_padir |= 0x0200;
#if 0
/* VCC switch error flag, PCMCIA slot INPACK_ pin */
cp->cp_pbdir &= ~(0x0020 | 0x0010);
cp->cp_pbpar &= ~(0x0020 | 0x0010);
udelay(500000);
#endif
debug ("Enable PCMCIA buffers and stop RESET\n");
reg = PCMCIA_PGCRX(_slot_);
reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
PCMCIA_PGCRX(_slot_) = reg;
udelay(250000); /* some cards need >150 ms to come up :-( */
debug ("# hardware_enable done\n");
return (0);
}
#if defined(CONFIG_CMD_PCMCIA)
int pcmcia_hardware_disable(int slot)
{
volatile immap_t *immap;
u_long reg;
debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
immap = (immap_t *)CONFIG_SYS_IMMR;
/* remove all power */
immap->im_ioport.iop_pcdat |= 0x0400;
immap->im_ioport.iop_padat |= 0x0200;
/* Configure PCMCIA General Control Register */
debug ("Disable PCMCIA buffers and assert RESET\n");
reg = 0;
reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
PCMCIA_PGCRX(_slot_) = reg;
udelay(10000);
return (0);
}
#endif
int pcmcia_voltage_set(int slot, int vcc, int vpp)
{
volatile immap_t *immap;
volatile pcmconf8xx_t *pcmp;
u_long reg;
debug ("voltage_set: "
PCMCIA_BOARD_MSG
" Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
immap = (immap_t *)CONFIG_SYS_IMMR;
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
/*
* Disable PCMCIA buffers (isolate the interface)
* and assert RESET signal
*/
debug ("Disable PCMCIA buffers and assert RESET\n");
reg = PCMCIA_PGCRX(_slot_);
reg |= __MY_PCMCIA_GCRX_CXRESET; /* active high */
reg |= __MY_PCMCIA_GCRX_CXOE; /* active low */
PCMCIA_PGCRX(_slot_) = reg;
udelay(500);
/*
* Configure Ports A & C pins for
* 5 Volts Enable and 3 Volts enable,
* Turn off all power
*/
debug ("PCMCIA power OFF\n");
immap->im_ioport.iop_pcpar &= ~(0x0400);
immap->im_ioport.iop_pcso &= ~(0x0400);/*
immap->im_ioport.iop_pcdir |= 0x0400;*/
immap->im_ioport.iop_papar &= ~(0x0200);/*
immap->im_ioport.iop_padir |= 0x0200;*/
immap->im_ioport.iop_pcdat |= 0x0400;
immap->im_ioport.iop_padat |= 0x0200;
reg = 0;
switch(vcc) {
case 0: break;
case 33: reg |= 0x0200; break;
case 50: reg |= 0x0400; break;
default: goto done;
}
/* Checking supported voltages */
debug ("PIPR: 0x%x --> %s\n",
pcmp->pcmc_pipr,
(pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
if (reg & 0x0200)
immap->im_ioport.iop_pcdat &= !reg;
if (reg & 0x0400)
immap->im_ioport.iop_padat &= !reg;
immap->im_ioport.iop_pcdir |= 0x0200;
immap->im_ioport.iop_padir |= 0x0400;
if (reg) {
debug ("PCMCIA powered at %sV\n",
(reg&0x0400) ? "5.0" : "3.3");
} else {
debug ("PCMCIA powered down\n");
}
done:
debug ("Enable PCMCIA buffers and stop RESET\n");
reg = PCMCIA_PGCRX(_slot_);
reg &= ~__MY_PCMCIA_GCRX_CXRESET; /* active high */
reg &= ~__MY_PCMCIA_GCRX_CXOE; /* active low */
PCMCIA_PGCRX(_slot_) = reg;
udelay(500);
debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
slot+'A');
return (0);
}
#endif /* CCONFIG_PCMCIA */