pcmcia.c
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#include <common.h>
#include <mpc8xx.h>
#include <pcmcia.h>
#include "csr.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
/* A lot of this has been taken from the RPX code in this file it works from me.
I have added the voltage selection for the MBX board. */
/* MBX voltage bit in control register #2 */
#define CR2_VPP12 ((uchar)0x10)
#define CR2_VPPVDD ((uchar)0x20)
#define CR2_VDD5 ((uchar)0x40)
#define CR2_VDD3 ((uchar)0x80)
#define PCMCIA_BOARD_MSG "MBX860"
int pcmcia_voltage_set (int slot, int vcc, int vpp)
{
uchar reg = 0;
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);
switch (vcc) {
case 0:
break;
case 33:
reg |= CR2_VDD3;
break;
case 50:
reg |= CR2_VDD5;
break;
default:
return 1;
}
switch (vpp) {
case 0:
break;
case 33:
case 50:
if (vcc == vpp) {
reg |= CR2_VPPVDD;
} else {
return 1;
}
break;
case 120:
reg |= CR2_VPP12;
break;
default:
return 1;
}
/* first, turn off all power */
MBX_CSR2 &= ~(CR2_VDDSEL | CR2_VPPSEL);
/* enable new powersettings */
MBX_CSR2 |= reg;
debug ("MBX_CSR2 read = 0x%02x\n", MBX_CSR2);
return (0);
}
int pcmcia_hardware_enable (int slot)
{
volatile pcmconf8xx_t *pcmp;
uint reg, mask;
debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n",
'A' + slot);
udelay (10000);
pcmp = (pcmconf8xx_t *) (&(((immap_t *) CONFIG_SYS_IMMR)->im_pcmcia));
/* 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);
/* remove all power */
pcmcia_voltage_set (slot, 0, 0);
/*
* 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 & (0x10000000 >> (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) {
pcmcia_voltage_set (_slot_, 50, 0);
printf (" 5.0V card found: ");
} else {
pcmcia_voltage_set (_slot_, 33, 0);
printf (" 3.3V card found: ");
}
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)
{
return 0; /* No hardware to disable */
}
#endif
#endif /* CONFIG_PCMCIA */