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smaeul-u-boot/board/lwmon/pcmcia.c
Wolfgang Denk 9d40799551 Major PCMCIA Cleanup to make code better readable and maintainable. 
Notes:
- Board-dependend code for RPXLITE and RPXCLASSIC-based boards
  placed to the drivers/rpx_pmcia.c file to avoid duplication.
  Same for TQM8xx-based boards (drivers/tqm8xx_pmcia.c).
- drivers/i82365.c has been split into two parts located at
  board/atc/ti113x.c and board/cpc45/pd67290.c (ATC and CPC45 are
  the only boards using CONFIG_82365).
- Changes were tested for clean build and *very* *few* boards.
2006-07-10 23:07:28 +02:00

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#include <common.h>
#include <mpc8xx.h>
#include <pcmcia.h>
#include <i2c.h>
#undef CONFIG_PCMCIA
#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
#define CONFIG_PCMCIA
#endif
#if (CONFIG_COMMANDS & CFG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
#define CONFIG_PCMCIA
#endif
#ifdef CONFIG_PCMCIA
#define PCMCIA_BOARD_MSG "LWMON"
/* #define's for MAX1604 Power Switch */
#define MAX1604_OP_SUS 0x80
#define MAX1604_VCCBON 0x40
#define MAX1604_VCC_35 0x20
#define MAX1604_VCCBHIZ 0x10
#define MAX1604_VPPBON 0x08
#define MAX1604_VPPBPBPGM 0x04
#define MAX1604_VPPBHIZ 0x02
/* reserved 0x01 */
int pcmcia_hardware_enable(int slot)
{
volatile immap_t *immap;
volatile cpm8xx_t *cp;
volatile pcmconf8xx_t *pcmp;
volatile sysconf8xx_t *sysp;
uint reg, mask;
uchar val;
debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
/* Switch on PCMCIA port in PIC register 0x60 */
reg = pic_read (0x60);
debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
reg &= ~0x10;
/* reg |= 0x08; Vpp not needed */
pic_write (0x60, reg);
#ifdef DEBUG
reg = pic_read (0x60);
printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
#endif
udelay(10000);
immap = (immap_t *)CFG_IMMR;
sysp = (sysconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_siu_conf));
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
/*
* 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.
*/
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) {
val = 0; /* VCCB3/5 = 0 ==> use Vx = 5.0 V */
puts (" 5.0V card found: ");
} else {
val = MAX1604_VCC_35; /* VCCB3/5 = 1 ==> use Vy = 3.3 V */
puts (" 3.3V card found: ");
}
/* switch VCC on */
val |= MAX1604_OP_SUS | MAX1604_VCCBON;
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
i2c_write (CFG_I2C_POWER_A_ADDR, 0, 0, &val, 1);
udelay(500000);
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 (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
int pcmcia_hardware_disable(int slot)
{
volatile immap_t *immap;
volatile pcmconf8xx_t *pcmp;
u_long reg;
uchar val;
debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
immap = (immap_t *)CFG_IMMR;
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
/* remove all power, put output in high impedance state */
val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ;
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
i2c_write (CFG_I2C_POWER_A_ADDR, 0, 0, &val, 1);
/* 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;
/* Switch off PCMCIA port in PIC register 0x60 */
reg = pic_read (0x60);
debug ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
reg |= 0x10;
reg &= ~0x08;
pic_write (0x60, reg);
#ifdef DEBUG
reg = pic_read (0x60);
printf ("[%d] PIC read: reg_60 = 0x%02x\n", __LINE__, reg);
#endif
udelay(10000);
return (0);
}
#endif /* CFG_CMD_PCMCIA */
int pcmcia_voltage_set(int slot, int vcc, int vpp)
{
volatile immap_t *immap;
volatile pcmconf8xx_t *pcmp;
u_long reg;
uchar val;
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 *)CFG_IMMR;
pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_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);
/*
* Turn off all power (switch to high impedance)
*/
debug ("PCMCIA power OFF\n");
val = MAX1604_VCCBHIZ | MAX1604_VPPBHIZ;
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
i2c_write (CFG_I2C_POWER_A_ADDR, 0, 0, &val, 1);
val = 0;
switch(vcc) {
case 0: break;
case 33: val = MAX1604_VCC_35; break;
case 50: 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");
i2c_write (CFG_I2C_POWER_A_ADDR, 0, 0, &val, 1);
if (val) {
debug ("PCMCIA powered at %sV\n",
(val & MAX1604_VCC_35) ? "3.3" : "5.0");
} 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 /* CONFIG_PCMCIA */
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