board/gth/pcmcia.c

   1 #include <common.h>
   2 #include <mpc8xx.h>
   3 #include <pcmcia.h>
   4
   5 #undef  CONFIG_PCMCIA
   6
   7 #if defined(CONFIG_CMD_PCMCIA)
   8 #define CONFIG_PCMCIA
   9 #endif
  10
  11 #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
  12 #define CONFIG_PCMCIA
  13 #endif
  14
  15 #ifdef  CONFIG_PCMCIA
  16
  17 #define PCMCIA_BOARD_MSG "GTH COMPACT FLASH"
  18
  19 int pcmcia_voltage_set (int slot, int vcc, int vpp)
  20 {       /* Do nothing */
  21         return 0;
  22 }
  23
  24 int pcmcia_hardware_enable (int slot)
  25 {
  26         volatile immap_t *immap;
  27         volatile cpm8xx_t *cp;
  28         volatile pcmconf8xx_t *pcmp;
  29         volatile sysconf8xx_t *sysp;
  30         uint reg, mask;
  31
  32         debug ("hardware_enable: GTH Slot %c\n", 'A' + slot);
  33
  34         immap = (immap_t *) CONFIG_SYS_IMMR;
  35         sysp = (sysconf8xx_t *) (&(((immap_t *) CONFIG_SYS_IMMR)->im_siu_conf));
  36         pcmp = (pcmconf8xx_t *) (&(((immap_t *) CONFIG_SYS_IMMR)->im_pcmcia));
  37         cp = (cpm8xx_t *) (&(((immap_t *) CONFIG_SYS_IMMR)->im_cpm));
  38
  39         /* clear interrupt state, and disable interrupts */
  40         pcmp->pcmc_pscr = PCMCIA_MASK (_slot_);
  41         pcmp->pcmc_per &= ~PCMCIA_MASK (_slot_);
  42
  43         /*
  44         * Disable interrupts, DMA, and PCMCIA buffers
  45         * (isolate the interface) and assert RESET signal
  46         */
  47         debug ("Disable PCMCIA buffers and assert RESET\n");
  48         reg = 0;
  49         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
  50         reg |= __MY_PCMCIA_GCRX_CXOE;   /* active low  */
  51         PCMCIA_PGCRX (_slot_) = reg;
  52         udelay (500);
  53
  54         /*
  55         * Make sure there is a card in the slot,
  56         * then configure the interface.
  57         */
  58         udelay (10000);
  59         debug ("[%d] %s: PIPR(%p)=0x%x\n",
  60                __LINE__, __FUNCTION__,
  61                &(pcmp->pcmc_pipr), pcmp->pcmc_pipr);
  62         if (pcmp->pcmc_pipr & 0x98000000) {
  63                 printf ("   No Card found\n");
  64                 return (1);
  65         }
  66
  67         mask = PCMCIA_VS1 (slot) | PCMCIA_VS2 (slot);
  68         reg = pcmp->pcmc_pipr;
  69         debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
  70                reg,
  71                (reg & PCMCIA_VS1 (slot)) ? "n" : "ff",
  72                (reg & PCMCIA_VS2 (slot)) ? "n" : "ff");
  73
  74         debug ("Enable PCMCIA buffers and stop RESET\n");
  75         reg  =  PCMCIA_PGCRX (_slot_);
  76         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
  77         reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
  78         PCMCIA_PGCRX (_slot_) = reg;
  79
  80         udelay (250000);        /* some cards need >150 ms to come up :-( */
  81
  82         debug ("# hardware_enable done\n");
  83
  84         return 0;
  85 }
  86 #if defined(CONFIG_CMD_PCMCIA)
  87 int pcmcia_hardware_disable(int slot)
  88 {
  89         return 0;       /* No hardware to disable */
  90 }
  91 #endif
  92
  93 #endif  /* CONFIG_PCMCIA */