board/esd/vom405/vom405.c

   1 /*
   2  * (C) Copyright 2001-2004
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/processor.h>
  10 #include <asm/io.h>
  11 #include <command.h>
  12 #include <malloc.h>
  13 #include <sja1000.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 extern void lxt971_no_sleep(void);
  18
  19 /*
  20  * generate a short spike on the CAN tx line
  21  * to bring the couplers in sync
  22  */
  23 void init_coupler(u32 addr)
  24 {
  25         struct sja1000_basic_s *ctrl = (struct sja1000_basic_s *)addr;
  26
  27         /* reset */
  28         out_8(&ctrl->cr, CR_RR);
  29
  30         /* dominant */
  31         out_8(&ctrl->btr0, 0x00); /* btr setup is required */
  32         out_8(&ctrl->btr1, 0x14); /* we use 1Mbit/s */
  33         out_8(&ctrl->oc, OC_TP1 | OC_TN1 | OC_POL1 |
  34               OC_TP0 | OC_TN0 | OC_POL0 | OC_MODE1);
  35         out_8(&ctrl->cr, 0x00);
  36
  37         /* delay */
  38         in_8(&ctrl->cr);
  39         in_8(&ctrl->cr);
  40         in_8(&ctrl->cr);
  41         in_8(&ctrl->cr);
  42
  43         /* reset */
  44         out_8(&ctrl->cr, CR_RR);
  45 }
  46
  47 int board_early_init_f (void)
  48 {
  49         /*
  50          * IRQ 0-15  405GP internally generated; active high; level sensitive
  51          * IRQ 16    405GP internally generated; active low; level sensitive
  52          * IRQ 17-24 RESERVED
  53          * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
  54          * IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
  55          * IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
  56          * IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
  57          * IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
  58          * IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
  59          * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
  60          */
  61         mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
  62         mtdcr(UIC0ER, 0x00000000);       /* disable all ints */
  63         mtdcr(UIC0CR, 0x00000000);       /* set all to be non-critical*/
  64         mtdcr(UIC0PR, 0xFFFFFF80);       /* set int polarities */
  65         mtdcr(UIC0TR, 0x10000000);       /* set int trigger levels */
  66         mtdcr(UIC0VCR, 0x00000001);      /* set vect base=0,INT0 highest priority*/
  67         mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
  68
  69         /*
  70          * EBC Configuration Register: set ready timeout to 512 ebc-clks -> ca. 15 us
  71          */
  72         mtebc (EBC0_CFG, 0xa8400000); /* ebc always driven */
  73
  74         /*
  75          * Reset CPLD via GPIO12 (CS3) pin
  76          */
  77         out_be32((void *)GPIO0_OR,
  78                  in_be32((void *)GPIO0_OR) & ~(0x80000000 >> 12));
  79         udelay(1000); /* wait 1ms */
  80         out_be32((void *)GPIO0_OR,
  81                  in_be32((void *)GPIO0_OR) | (0x80000000 >> 12));
  82         udelay(1000); /* wait 1ms */
  83
  84         return 0;
  85 }
  86
  87 int misc_init_r (void)
  88 {
  89         /* adjust flash start and offset */
  90         gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
  91         gd->bd->bi_flashoffset = 0;
  92
  93         /*
  94          * Init magnetic coupler
  95          */
  96         if (!getenv("noinitcoupler"))
  97                 init_coupler(CAN_BA);
  98
  99         return (0);
 100 }
 101
 102 /*
 103  * Check Board Identity:
 104  */
 105 int checkboard (void)
 106 {
 107         char str[64];
 108         int i = getenv_f("serial#", str, sizeof(str));
 109         int flashcnt;
 110         int delay;
 111         u8 *led_reg = (u8 *)(CAN_BA + 0x1000);
 112
 113         puts ("Board: ");
 114
 115         if (i == -1) {
 116                 puts ("### No HW ID - assuming VOM405");
 117         } else {
 118                 puts(str);
 119         }
 120
 121         printf(" (PLD-Version=%02d)\n", in_8(led_reg));
 122
 123         /*
 124          * Flash LEDs
 125          */
 126         for (flashcnt = 0; flashcnt < 3; flashcnt++) {
 127                 out_8(led_reg, 0x40);        /* LED_B..D off */
 128                 for (delay = 0; delay < 100; delay++)
 129                         udelay(1000);
 130                 out_8(led_reg, 0x47);        /* LED_B..D on */
 131                 for (delay = 0; delay < 50; delay++)
 132                         udelay(1000);
 133         }
 134         out_8(led_reg, 0x40);
 135
 136         return 0;
 137 }
 138
 139 void reset_phy(void)
 140 {
 141 #ifdef CONFIG_LXT971_NO_SLEEP
 142
 143         /*
 144          * Disable sleep mode in LXT971
 145          */
 146         lxt971_no_sleep();
 147 #endif
 148 }