mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-25 22:20:45 +00:00
284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
#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 "C2MON"
|
|
|
|
static void cfg_ports (void)
|
|
{
|
|
volatile immap_t *immap;
|
|
volatile cpm8xx_t *cp;
|
|
ushort sreg;
|
|
|
|
immap = (immap_t *)CONFIG_SYS_IMMR;
|
|
cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
|
|
|
|
/*
|
|
* Configure Port C for TPS2211 PC-Card Power-Interface Switch
|
|
*
|
|
* Switch off all voltages, assert shutdown
|
|
*/
|
|
sreg = immap->im_ioport.iop_pcdat;
|
|
sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1); /* VAVPP => Hi-Z */
|
|
sreg &= ~(TPS2211_VCCD0 | TPS2211_VCCD1); /* 3V and 5V off */
|
|
immap->im_ioport.iop_pcdat = sreg;
|
|
|
|
immap->im_ioport.iop_pcpar &= ~(TPS2211_OUTPUTS);
|
|
immap->im_ioport.iop_pcdir |= TPS2211_OUTPUTS;
|
|
|
|
debug ("Set Port C: PAR: %04x DIR: %04x DAT: %04x\n",
|
|
immap->im_ioport.iop_pcpar,
|
|
immap->im_ioport.iop_pcdir,
|
|
immap->im_ioport.iop_pcdat);
|
|
|
|
/*
|
|
* Configure Port B for TPS2211 PC-Card Power-Interface Switch
|
|
*
|
|
* Over-Current Input only
|
|
*/
|
|
cp->cp_pbpar &= ~(TPS2211_INPUTS);
|
|
cp->cp_pbdir &= ~(TPS2211_INPUTS);
|
|
|
|
debug ("Set Port B: PAR: %08x DIR: %08x DAT: %08x\n",
|
|
cp->cp_pbpar, cp->cp_pbdir, cp->cp_pbdat);
|
|
}
|
|
|
|
int pcmcia_hardware_enable(int slot)
|
|
{
|
|
volatile immap_t *immap;
|
|
volatile cpm8xx_t *cp;
|
|
volatile pcmconf8xx_t *pcmp;
|
|
volatile sysconf8xx_t *sysp;
|
|
uint reg, pipr, mask;
|
|
ushort sreg;
|
|
int i;
|
|
|
|
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));
|
|
cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
|
|
|
|
/* Configure Ports for TPS2211A PC-Card Power-Interface Switch */
|
|
cfg_ports ();
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/*
|
|
* 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: Set VAVCC to 3.3V or 5V, set VAVPP to Hi-Z
|
|
*/
|
|
mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
|
|
pipr = pcmp->pcmc_pipr;
|
|
debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
|
|
pipr,
|
|
(reg&PCMCIA_VS1(slot))?"n":"ff",
|
|
(reg&PCMCIA_VS2(slot))?"n":"ff");
|
|
|
|
sreg = immap->im_ioport.iop_pcdat;
|
|
if ((pipr & mask) == mask) {
|
|
sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1 | /* VAVPP => Hi-Z */
|
|
TPS2211_VCCD1); /* 5V on */
|
|
sreg &= ~(TPS2211_VCCD0); /* 3V off */
|
|
puts (" 5.0V card found: ");
|
|
} else {
|
|
sreg |= (TPS2211_VPPD0 | TPS2211_VPPD1 | /* VAVPP => Hi-Z */
|
|
TPS2211_VCCD0); /* 3V on */
|
|
sreg &= ~(TPS2211_VCCD1); /* 5V off */
|
|
puts (" 3.3V card found: ");
|
|
}
|
|
|
|
debug ("\nPC DAT: %04x -> 3.3V %s 5.0V %s\n",
|
|
sreg,
|
|
( (sreg & TPS2211_VCCD0) && !(sreg & TPS2211_VCCD1)) ? "on" : "off",
|
|
(!(sreg & TPS2211_VCCD0) && (sreg & TPS2211_VCCD1)) ? "on" : "off"
|
|
);
|
|
|
|
immap->im_ioport.iop_pcdat = sreg;
|
|
|
|
/* Wait 500 ms; use this to check for over-current */
|
|
for (i=0; i<5000; ++i) {
|
|
if ((cp->cp_pbdat & TPS2211_OC) == 0) {
|
|
printf (" *** Overcurrent - Safety shutdown ***\n");
|
|
immap->im_ioport.iop_pcdat &= ~(TPS2211_VCCD0|TPS2211_VCCD1);
|
|
return (1);
|
|
}
|
|
udelay (100);
|
|
}
|
|
|
|
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;
|
|
volatile cpm8xx_t *cp;
|
|
volatile pcmconf8xx_t *pcmp;
|
|
u_long reg;
|
|
|
|
debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
|
|
|
|
immap = (immap_t *)CONFIG_SYS_IMMR;
|
|
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
|
|
|
|
/* 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;
|
|
|
|
/* ALl voltages off / Hi-Z */
|
|
immap->im_ioport.iop_pcdat |= (TPS2211_VPPD0 | TPS2211_VPPD1 |
|
|
TPS2211_VCCD0 | TPS2211_VCCD1 );
|
|
|
|
udelay(10000);
|
|
|
|
return (0);
|
|
}
|
|
#endif
|
|
|
|
|
|
int pcmcia_voltage_set(int slot, int vcc, int vpp)
|
|
{
|
|
volatile immap_t *immap;
|
|
volatile cpm8xx_t *cp;
|
|
volatile pcmconf8xx_t *pcmp;
|
|
u_long reg;
|
|
ushort sreg;
|
|
|
|
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;
|
|
cp = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
|
|
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 Port C pins for
|
|
* 5 Volts Enable and 3 Volts enable,
|
|
* Turn all power pins to Hi-Z
|
|
*/
|
|
debug ("PCMCIA power OFF\n");
|
|
cfg_ports (); /* Enables switch, but all in Hi-Z */
|
|
|
|
sreg = immap->im_ioport.iop_pcdat;
|
|
sreg |= TPS2211_VPPD0 | TPS2211_VPPD1; /* VAVPP always Hi-Z */
|
|
|
|
switch(vcc) {
|
|
case 0: break; /* Switch off */
|
|
case 33: sreg |= TPS2211_VCCD0; /* Switch on 3.3V */
|
|
sreg &= ~TPS2211_VCCD1;
|
|
break;
|
|
case 50: sreg &= ~TPS2211_VCCD0; /* Switch on 5.0V */
|
|
sreg |= TPS2211_VCCD1;
|
|
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");
|
|
|
|
immap->im_ioport.iop_pcdat = sreg;
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
char *s;
|
|
|
|
if ((sreg & TPS2211_VCCD0) && !(sreg & TPS2211_VCCD1)) {
|
|
s = "at 3.3V";
|
|
} else if (!(sreg & TPS2211_VCCD0) && (sreg & TPS2211_VCCD1)) {
|
|
s = "at 5.0V";
|
|
} else {
|
|
s = "down";
|
|
}
|
|
printf ("PCMCIA powered %s\n", s);
|
|
}
|
|
#endif
|
|
|
|
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 /* CONFIG_PCMCIA */
|