arch/mips/cobalt/setup.c

   1 /*
   2  * Setup pointers to hardware dependent routines.
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 1996, 1997, 2004, 05 by Ralf Baechle (ralf@linux-mips.org)
   9  * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
  10  *
  11  */
  12 #include <linux/interrupt.h>
  13 #include <linux/init.h>
  14 #include <linux/pm.h>
  15
  16 #include <asm/bootinfo.h>
  17 #include <asm/time.h>
  18 #include <asm/i8253.h>
  19 #include <asm/io.h>
  20 #include <asm/reboot.h>
  21 #include <asm/gt64120.h>
  22
  23 #include <cobalt.h>
  24 #include <irq.h>
  25
  26 extern void cobalt_machine_restart(char *command);
  27 extern void cobalt_machine_halt(void);
  28
  29 const char *get_system_type(void)
  30 {
  31         switch (cobalt_board_id) {
  32                 case COBALT_BRD_ID_QUBE1:
  33                         return "Cobalt Qube";
  34                 case COBALT_BRD_ID_RAQ1:
  35                         return "Cobalt RaQ";
  36                 case COBALT_BRD_ID_QUBE2:
  37                         return "Cobalt Qube2";
  38                 case COBALT_BRD_ID_RAQ2:
  39                         return "Cobalt RaQ2";
  40         }
  41         return "MIPS Cobalt";
  42 }
  43
  44 void __init plat_timer_setup(struct irqaction *irq)
  45 {
  46         /* Load timer value for HZ (TCLK is 50MHz) */
  47         GT_WRITE(GT_TC0_OFS, 50*1000*1000 / HZ);
  48
  49         /* Enable timer0 */
  50         GT_WRITE(GT_TC_CONTROL_OFS, GT_TC_CONTROL_ENTC0_MSK | GT_TC_CONTROL_SELTC0_MSK);
  51
  52         setup_irq(GT641XX_TIMER0_IRQ, irq);
  53 }
  54
  55 /*
  56  * Cobalt doesn't have PS/2 keyboard/mouse interfaces,
  57  * keyboard conntroller is never used.
  58  * Also PCI-ISA bridge DMA contoroller is never used.
  59  */
  60 static struct resource cobalt_reserved_resources[] = {
  61         {       /* dma1 */
  62                 .start  = 0x00,
  63                 .end    = 0x1f,
  64                 .name   = "reserved",
  65                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  66         },
  67         {       /* keyboard */
  68                 .start  = 0x60,
  69                 .end    = 0x6f,
  70                 .name   = "reserved",
  71                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  72         },
  73         {       /* dma page reg */
  74                 .start  = 0x80,
  75                 .end    = 0x8f,
  76                 .name   = "reserved",
  77                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  78         },
  79         {       /* dma2 */
  80                 .start  = 0xc0,
  81                 .end    = 0xdf,
  82                 .name   = "reserved",
  83                 .flags  = IORESOURCE_BUSY | IORESOURCE_IO,
  84         },
  85 };
  86
  87 void __init plat_time_init(void)
  88 {
  89         setup_pit_timer();
  90 }
  91
  92 void __init plat_mem_setup(void)
  93 {
  94         int i;
  95
  96         _machine_restart = cobalt_machine_restart;
  97         _machine_halt = cobalt_machine_halt;
  98         pm_power_off = cobalt_machine_halt;
  99
 100         set_io_port_base(CKSEG1ADDR(GT_DEF_PCI0_IO_BASE));
 101
 102         /* I/O port resource must include LCD/buttons */
 103         ioport_resource.end = 0x0fffffff;
 104
 105         /* These resources have been reserved by VIA SuperI/O chip. */
 106         for (i = 0; i < ARRAY_SIZE(cobalt_reserved_resources); i++)
 107                 request_resource(&ioport_resource, cobalt_reserved_resources + i);
 108 }
 109
 110 /*
 111  * Prom init. We read our one and only communication with the firmware.
 112  * Grab the amount of installed memory.
 113  * Better boot loaders (CoLo) pass a command line too :-)
 114  */
 115
 116 void __init prom_init(void)
 117 {
 118         int narg, indx, posn, nchr;
 119         unsigned long memsz;
 120         char **argv;
 121
 122         memsz = fw_arg0 & 0x7fff0000;
 123         narg = fw_arg0 & 0x0000ffff;
 124
 125         if (narg) {
 126                 arcs_cmdline[0] = '\0';
 127                 argv = (char **) fw_arg1;
 128                 posn = 0;
 129                 for (indx = 1; indx < narg; ++indx) {
 130                         nchr = strlen(argv[indx]);
 131                         if (posn + 1 + nchr + 1 > sizeof(arcs_cmdline))
 132                                 break;
 133                         if (posn)
 134                                 arcs_cmdline[posn++] = ' ';
 135                         strcpy(arcs_cmdline + posn, argv[indx]);
 136                         posn += nchr;
 137                 }
 138         }
 139
 140         add_memory_region(0x0, memsz, BOOT_MEM_RAM);
 141 }
 142
 143 void __init prom_free_prom_memory(void)
 144 {
 145         /* Nothing to do! */
 146 }