Merge branch 'wd'

1 files changed, 240 insertions, 0 deletions

diff --git a/board/lwmon/pcmcia.c b/board/lwmon/pcmcia.c
new file mode 100644
index 0000000..2349286
--- /dev/null
+++ b/board/lwmon/pcmcia.c
@@ -0,0 +1,240 @@
+#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 */