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-rw-r--r--board/c2mon/pcmcia.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/board/c2mon/pcmcia.c b/board/c2mon/pcmcia.c
new file mode 100644
index 0000000..5e50c4d
--- /dev/null
+++ b/board/c2mon/pcmcia.c
@@ -0,0 +1,284 @@
+#include <common.h>
+#include <mpc8xx.h>
+#include <pcmcia.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 "C2MON"
+
+static void cfg_ports (void)
+{
+ volatile immap_t *immap;
+ volatile cpm8xx_t *cp;
+ ushort sreg;
+
+ immap = (immap_t *)CFG_IMMR;
+ cp = (cpm8xx_t *)(&(((immap_t *)CFG_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 *)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 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 (CONFIG_COMMANDS & CFG_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 *)CFG_IMMR;
+ pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_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 /* CFG_CMD_PCMCIA */
+
+
+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 *)CFG_IMMR;
+ cp = (cpm8xx_t *)(&(((immap_t *)CFG_IMMR)->im_cpm));
+ 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);
+
+ /*
+ * 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 */
generated by cgit v1.1 at 2024-11-16 06:55:54 +0000