drivers/pxa_pcmcia.c

   1 #include <common.h>
   2 #include <config.h>
   3
   4 #ifdef CONFIG_PXA_PCMCIA
   5
   6 #include <pcmcia.h>
   7 #include <asm/arch/pxa-regs.h>
   8 #include <asm/io.h>
   9
  10 static inline void msWait(unsigned msVal)
  11 {
  12         udelay(msVal*1000);
  13 }
  14
  15 int pcmcia_on (void)
  16 {
  17         unsigned int reg_arr[] = {
  18                 0x48000028, CFG_MCMEM0_VAL,
  19                 0x4800002c, CFG_MCMEM1_VAL,
  20                 0x48000030, CFG_MCATT0_VAL,
  21                 0x48000034, CFG_MCATT1_VAL,
  22                 0x48000038, CFG_MCIO0_VAL,
  23                 0x4800003c, CFG_MCIO1_VAL,
  24
  25                 0, 0
  26         };
  27         int i, rc;
  28
  29 #ifdef CONFIG_EXADRON1
  30         int cardDetect;
  31         volatile unsigned int *v_pBCRReg =
  32                         (volatile unsigned int *) 0x08000000;
  33 #endif
  34
  35         debug ("%s\n", __FUNCTION__);
  36
  37         i = 0;
  38         while (reg_arr[i])
  39                 *((volatile unsigned int *) reg_arr[i++]) |= reg_arr[i++];
  40         udelay (1000);
  41
  42         debug ("%s: programmed mem controller \n", __FUNCTION__);
  43
  44 #ifdef CONFIG_EXADRON1
  45
  46 /*define useful BCR masks */
  47 #define BCR_CF_INIT_VAL                     0x00007230
  48 #define BCR_CF_PWRON_BUSOFF_RESETOFF_VAL    0x00007231
  49 #define BCR_CF_PWRON_BUSOFF_RESETON_VAL     0x00007233
  50 #define BCR_CF_PWRON_BUSON_RESETON_VAL      0x00007213
  51 #define BCR_CF_PWRON_BUSON_RESETOFF_VAL     0x00007211
  52
  53         /* we see from the GPIO bit if the card is present */
  54         cardDetect = !(GPLR0 & GPIO_bit (14));
  55
  56         if (cardDetect) {
  57                 printf ("No PCMCIA card found!\n");
  58         }
  59
  60         /* reset the card via the BCR line */
  61         *v_pBCRReg = (unsigned) BCR_CF_INIT_VAL;
  62         msWait (500);
  63
  64         *v_pBCRReg = (unsigned) BCR_CF_PWRON_BUSOFF_RESETOFF_VAL;
  65         msWait (500);
  66
  67         *v_pBCRReg = (unsigned) BCR_CF_PWRON_BUSOFF_RESETON_VAL;
  68         msWait (500);
  69
  70         *v_pBCRReg = (unsigned) BCR_CF_PWRON_BUSON_RESETON_VAL;
  71         msWait (500);
  72
  73         *v_pBCRReg = (unsigned) BCR_CF_PWRON_BUSON_RESETOFF_VAL;
  74         msWait (1500);
  75
  76         /* enable address bus */
  77         GPCR1 = 0x01;
  78         /* and the first CF slot */
  79         MECR = 0x00000002;
  80
  81 #endif /* EXADRON 1 */
  82
  83         rc = check_ide_device (0);      /* use just slot 0 */
  84
  85         return rc;
  86 }
  87
  88 #if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
  89 int pcmcia_off (void)
  90 {
  91         return 0;
  92 }
  93 #endif
  94
  95 #endif /* CONFIG_PXA_PCMCIA */