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-rw-r--r--board/lwmon/pcmcia.c240
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 */
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