board/mbx8xx/pcmcia.c

   1 #include <common.h>
   2 #include <mpc8xx.h>
   3 #include <pcmcia.h>
   4
   5 #include "csr.h"
   6
   7 #undef  CONFIG_PCMCIA
   8
   9 #if defined(CONFIG_CMD_PCMCIA)
  10 #define CONFIG_PCMCIA
  11 #endif
  12
  13 #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
  14 #define CONFIG_PCMCIA
  15 #endif
  16
  17 #ifdef  CONFIG_PCMCIA
  18
  19 /* A lot of this has been taken from the RPX code in this file it works from me.
  20    I have added the voltage selection for the MBX board. */
  21
  22 /* MBX voltage bit in control register #2 */
  23 #define CR2_VPP12       ((uchar)0x10)
  24 #define CR2_VPPVDD      ((uchar)0x20)
  25 #define CR2_VDD5        ((uchar)0x40)
  26 #define CR2_VDD3        ((uchar)0x80)
  27
  28 #define PCMCIA_BOARD_MSG "MBX860"
  29
  30 int pcmcia_voltage_set (int slot, int vcc, int vpp)
  31 {
  32         uchar reg = 0;
  33
  34         debug ("voltage_set: PCMCIA_BOARD_MSG Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
  35                'A' + slot, vcc / 10, vcc % 10, vpp / 10, vcc % 10);
  36
  37         switch (vcc) {
  38                 case 0:
  39                         break;
  40                 case 33:
  41                         reg |= CR2_VDD3;
  42                         break;
  43                 case 50:
  44                         reg |= CR2_VDD5;
  45                         break;
  46                 default:
  47                         return 1;
  48         }
  49
  50         switch (vpp) {
  51                 case 0:
  52                         break;
  53                 case 33:
  54                 case 50:
  55                         if (vcc == vpp) {
  56                                 reg |= CR2_VPPVDD;
  57                         } else {
  58                                 return 1;
  59                         }
  60                         break;
  61                 case 120:
  62                         reg |= CR2_VPP12;
  63                         break;
  64                 default:
  65                         return 1;
  66         }
  67
  68         /* first, turn off all power */
  69         MBX_CSR2 &= ~(CR2_VDDSEL | CR2_VPPSEL);
  70
  71         /* enable new powersettings */
  72         MBX_CSR2 |= reg;
  73         debug ("MBX_CSR2 read = 0x%02x\n", MBX_CSR2);
  74
  75         return (0);
  76 }
  77
  78 int pcmcia_hardware_enable (int slot)
  79 {
  80         volatile immap_t *immap;
  81         volatile cpm8xx_t *cp;
  82         volatile pcmconf8xx_t *pcmp;
  83         volatile sysconf8xx_t *sysp;
  84         uint reg, mask;
  85
  86         debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n",
  87                'A' + slot);
  88
  89         udelay (10000);
  90
  91         immap = (immap_t *) CFG_IMMR;
  92         sysp = (sysconf8xx_t *) (&(((immap_t *) CFG_IMMR)->im_siu_conf));
  93         pcmp = (pcmconf8xx_t *) (&(((immap_t *) CFG_IMMR)->im_pcmcia));
  94         cp = (cpm8xx_t *) (&(((immap_t *) CFG_IMMR)->im_cpm));
  95
  96         /* clear interrupt state, and disable interrupts */
  97         pcmp->pcmc_pscr = PCMCIA_MASK (_slot_);
  98         pcmp->pcmc_per &= ~PCMCIA_MASK (_slot_);
  99
 100         /*
 101         * Disable interrupts, DMA, and PCMCIA buffers
 102         * (isolate the interface) and assert RESET signal
 103         */
 104         debug ("Disable PCMCIA buffers and assert RESET\n");
 105         reg = 0;
 106         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 107         reg |= __MY_PCMCIA_GCRX_CXOE;   /* active low  */
 108         PCMCIA_PGCRX (_slot_) = reg;
 109         udelay (500);
 110
 111         /* remove all power */
 112         pcmcia_voltage_set (slot, 0, 0);
 113         /*
 114         * Make sure there is a card in the slot, then configure the interface.
 115         */
 116         udelay(10000);
 117         debug ("[%d] %s: PIPR(%p)=0x%x\n",
 118                __LINE__,__FUNCTION__,
 119                &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
 120 #ifndef CONFIG_HMI10
 121         if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
 122 #else
 123         if (pcmp->pcmc_pipr & (0x10000000 >> (slot << 4))) {
 124 #endif  /* CONFIG_HMI10 */
 125                 printf ("   No Card found\n");
 126                 return (1);
 127         }
 128
 129         /*
 130         * Power On.
 131         */
 132         mask = PCMCIA_VS1 (_slot_) | PCMCIA_VS2 (_slot_);
 133         reg = pcmp->pcmc_pipr;
 134         debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n", reg,
 135                (reg & PCMCIA_VS1 (slot)) ? "n" : "ff",
 136                (reg & PCMCIA_VS2 (slot)) ? "n" : "ff");
 137
 138         if ((reg & mask) == mask) {
 139                 pcmcia_voltage_set (_slot_, 50, 0);
 140                 printf (" 5.0V card found: ");
 141         } else {
 142                 pcmcia_voltage_set (_slot_, 33, 0);
 143                 printf (" 3.3V card found: ");
 144         }
 145
 146         debug ("Enable PCMCIA buffers and stop RESET\n");
 147         reg = PCMCIA_PGCRX (_slot_);
 148         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
 149         reg &= ~__MY_PCMCIA_GCRX_CXOE;  /* active low  */
 150         PCMCIA_PGCRX (_slot_) = reg;
 151
 152         udelay (250000);        /* some cards need >150 ms to come up :-( */
 153
 154         debug ("# hardware_enable done\n");
 155
 156         return (0);
 157         }
 158
 159 #if defined(CONFIG_CMD_PCMCIA)
 160 int pcmcia_hardware_disable (int slot)
 161 {
 162         return 0;       /* No hardware to disable */
 163 }
 164 #endif
 165
 166 #endif  /* CONFIG_PCMCIA */