omap_machdep.c

   1 /*      $OpenBSD: omap_machdep.c,v 1.6 2015/05/19 03:30:54 jsg Exp $    */
   2 /*
   3  * Copyright (c) 2013 Sylvestre Gallon <ccna.syl@gmail.com>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include <sys/param.h>
  19 #include <sys/types.h>
  20 #include <sys/device.h>
  21 #include <sys/systm.h>
  22 #include <sys/termios.h>
  23
  24 #include <machine/bus.h>
  25 #include <machine/bootconfig.h>
  26
  27 #include <dev/ic/comreg.h>
  28 #include <dev/ic/comvar.h>
  29
  30 #include <arm/cortex/smc.h>
  31 #include <arm/armv7/armv7var.h>
  32 #include <armv7/armv7/armv7var.h>
  33 #include <armv7/armv7/armv7_machdep.h>
  34
  35 extern void omap4_smc_call(uint32_t, uint32_t);
  36 extern void omdog_reset(void);
  37 extern char *omap_board_name(void);
  38 extern struct board_dev *omap_board_devs(void);
  39 extern void omap_board_init(void);
  40 extern int comcnspeed;
  41 extern int comcnmode;
  42
  43 void
  44 omap_platform_smc_write(bus_space_tag_t iot, bus_space_handle_t ioh,
  45     bus_size_t off, uint32_t op, uint32_t val)
  46 {
  47         switch (op) {
  48         case 0x100:     /* PL310 DEBUG */
  49         case 0x102:     /* PL310 CTL */
  50                 break;
  51         default:
  52                 panic("platform_smc_write: invalid operation %d", op);
  53         }
  54
  55         omap4_smc_call(op, val);
  56 }
  57
  58 void
  59 omap_platform_init_cons(void)
  60 {
  61         paddr_t paddr;
  62
  63         switch (board_id) {
  64         case BOARD_ID_OMAP3_BEAGLE:
  65         case BOARD_ID_OMAP3_OVERO:
  66                 paddr = 0x49020000;
  67                 break;
  68         case BOARD_ID_AM335X_BEAGLEBONE:
  69                 paddr = 0x44e09000;
  70                 break;
  71         case BOARD_ID_OMAP4_PANDA:
  72                 paddr = 0x48020000;
  73                 break;
  74         }
  75
  76         comcnattach(&armv7_a4x_bs_tag, paddr, comcnspeed, 48000000, comcnmode);
  77         comdefaultrate = comcnspeed;
  78 }
  79
  80 void
  81 omap_platform_watchdog_reset(void)
  82 {
  83         omdog_reset();
  84 }
  85
  86 void
  87 omap_platform_powerdown(void)
  88 {
  89
  90 }
  91
  92 const char *
  93 omap_platform_board_name(void)
  94 {
  95         return (omap_board_name());
  96 }
  97
  98 void
  99 omap_platform_disable_l2_if_needed(void)
 100 {
 101         switch (board_id) {
 102         case BOARD_ID_OMAP4_PANDA:
 103                 /* disable external L2 cache */
 104                 omap4_smc_call(0x102, 0);
 105                 break;
 106         }
 107 }
 108
 109 void
 110 omap_platform_board_init(void)
 111 {
 112         omap_board_init();
 113 }
 114
 115 struct armv7_platform omap_platform = {
 116         .boot_name = "OpenBSD/omap",
 117         .board_name = omap_platform_board_name,
 118         .board_init = omap_platform_board_init,
 119         .smc_write = omap_platform_smc_write,
 120         .init_cons = omap_platform_init_cons,
 121         .watchdog_reset = omap_platform_watchdog_reset,
 122         .powerdown = omap_platform_powerdown,
 123         .disable_l2_if_needed = omap_platform_disable_l2_if_needed,
 124 };
 125
 126 struct armv7_platform *
 127 omap_platform_match(void)
 128 {
 129         struct board_dev *devs;
 130
 131         devs = omap_board_devs();
 132         if (devs == NULL)
 133                 return (NULL);
 134
 135         omap_platform.devs = devs;
 136         return (&omap_platform);
 137 }