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/config.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/pci.h>
  15 #include <linux/init.h>
  16 #include <linux/pm.h>
  17 #include <linux/serial.h>
  18 #include <linux/serial_core.h>
  19
  20 #include <asm/bootinfo.h>
  21 #include <asm/time.h>
  22 #include <asm/io.h>
  23 #include <asm/irq.h>
  24 #include <asm/processor.h>
  25 #include <asm/reboot.h>
  26 #include <asm/gt64120.h>
  27 #include <asm/serial.h>
  28
  29 #include <asm/mach-cobalt/cobalt.h>
  30
  31 extern void cobalt_machine_restart(char *command);
  32 extern void cobalt_machine_halt(void);
  33 extern void cobalt_machine_power_off(void);
  34 extern void cobalt_early_console(void);
  35
  36 int cobalt_board_id;
  37
  38 const char *get_system_type(void)
  39 {
  40         switch (cobalt_board_id) {
  41                 case COBALT_BRD_ID_QUBE1:
  42                         return "Cobalt Qube";
  43                 case COBALT_BRD_ID_RAQ1:
  44                         return "Cobalt RaQ";
  45                 case COBALT_BRD_ID_QUBE2:
  46                         return "Cobalt Qube2";
  47                 case COBALT_BRD_ID_RAQ2:
  48                         return "Cobalt RaQ2";
  49         }
  50         return "MIPS Cobalt";
  51 }
  52
  53 static void __init cobalt_timer_setup(struct irqaction *irq)
  54 {
  55         /* Load timer value for 1KHz (TCLK is 50MHz) */
  56         GALILEO_OUTL(50*1000*1000 / 1000, GT_TC0_OFS);
  57
  58         /* Enable timer */
  59         GALILEO_OUTL(GALILEO_ENTC0 | GALILEO_SELTC0, GT_TC_CONTROL_OFS);
  60
  61         /* Register interrupt */
  62         setup_irq(COBALT_GALILEO_IRQ, irq);
  63
  64         /* Enable interrupt */
  65         GALILEO_OUTL(GALILEO_INTR_T0EXP | GALILEO_INL(GT_INTRMASK_OFS), GT_INTRMASK_OFS);
  66 }
  67
  68 extern struct pci_ops gt64111_pci_ops;
  69
  70 static struct resource cobalt_mem_resource = {
  71         .start  = GT64111_MEM_BASE,
  72         .end    = GT64111_MEM_END,
  73         .name   = "PCI memory",
  74         .flags  = IORESOURCE_MEM
  75 };
  76
  77 static struct resource cobalt_io_resource = {
  78         .start  = 0x1000,
  79         .end    = 0xffff,
  80         .name   = "PCI I/O",
  81         .flags  = IORESOURCE_IO
  82 };
  83
  84 static struct resource cobalt_io_resources[] = {
  85         {
  86                 .start  = 0x00,
  87                 .end    = 0x1f,
  88                 .name   = "dma1",
  89                 .flags  = IORESOURCE_BUSY
  90         }, {
  91                 .start  = 0x40,
  92                 .end    = 0x5f,
  93                 .name   = "timer",
  94                 .flags  = IORESOURCE_BUSY
  95         }, {
  96                 .start  = 0x60,
  97                 .end    = 0x6f,
  98                 .name   = "keyboard",
  99                 .flags  = IORESOURCE_BUSY
 100         }, {
 101                 .start  = 0x80,
 102                 .end    = 0x8f,
 103                 .name   = "dma page reg",
 104                 .flags  = IORESOURCE_BUSY
 105         }, {
 106                 .start  = 0xc0,
 107                 .end    = 0xdf,
 108                 .name   = "dma2",
 109                 .flags  = IORESOURCE_BUSY
 110         },
 111 };
 112
 113 #define COBALT_IO_RESOURCES (sizeof(cobalt_io_resources)/sizeof(struct resource))
 114
 115 static struct pci_controller cobalt_pci_controller = {
 116         .pci_ops        = &gt64111_pci_ops,
 117         .mem_resource   = &cobalt_mem_resource,
 118         .mem_offset     = 0,
 119         .io_resource    = &cobalt_io_resource,
 120         .io_offset      = 0 - GT64111_IO_BASE
 121 };
 122
 123 void __init plat_setup(void)
 124 {
 125         static struct uart_port uart;
 126         unsigned int devfn = PCI_DEVFN(COBALT_PCICONF_VIA, 0);
 127         int i;
 128
 129         _machine_restart = cobalt_machine_restart;
 130         _machine_halt = cobalt_machine_halt;
 131         pm_power_off = cobalt_machine_power_off;
 132
 133         board_timer_setup = cobalt_timer_setup;
 134
 135         set_io_port_base(CKSEG1ADDR(GT64111_IO_BASE));
 136
 137         /* I/O port resource must include UART and LCD/buttons */
 138         ioport_resource.end = 0x0fffffff;
 139
 140         /* request I/O space for devices used on all i[345]86 PCs */
 141         for (i = 0; i < COBALT_IO_RESOURCES; i++)
 142                 request_resource(&ioport_resource, cobalt_io_resources + i);
 143
 144         /* Read the cobalt id register out of the PCI config space */
 145         PCI_CFG_SET(devfn, (VIA_COBALT_BRD_ID_REG & ~0x3));
 146         cobalt_board_id = GALILEO_INL(GT_PCI0_CFGDATA_OFS);
 147         cobalt_board_id >>= ((VIA_COBALT_BRD_ID_REG & 3) * 8);
 148         cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(cobalt_board_id);
 149
 150         printk("Cobalt board ID: %d\n", cobalt_board_id);
 151
 152 #ifdef CONFIG_PCI
 153         register_pci_controller(&cobalt_pci_controller);
 154 #endif
 155
 156 #ifdef CONFIG_SERIAL_8250
 157         if (cobalt_board_id > COBALT_BRD_ID_RAQ1) {
 158
 159 #ifdef CONFIG_EARLY_PRINTK
 160                 cobalt_early_console();
 161 #endif
 162
 163                 uart.line       = 0;
 164                 uart.type       = PORT_UNKNOWN;
 165                 uart.uartclk    = 18432000;
 166                 uart.irq        = COBALT_SERIAL_IRQ;
 167                 uart.flags      = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
 168                 uart.iobase     = 0xc800000;
 169                 uart.iotype     = UPIO_PORT;
 170
 171                 early_serial_setup(&uart);
 172         }
 173 #endif
 174 }
 175
 176 /*
 177  * Prom init. We read our one and only communication with the firmware.
 178  * Grab the amount of installed memory.
 179  * Better boot loaders (CoLo) pass a command line too :-)
 180  */
 181
 182 void __init prom_init(void)
 183 {
 184         int narg, indx, posn, nchr;
 185         unsigned long memsz;
 186         char **argv;
 187
 188         mips_machgroup = MACH_GROUP_COBALT;
 189
 190         memsz = fw_arg0 & 0x7fff0000;
 191         narg = fw_arg0 & 0x0000ffff;
 192
 193         if (narg) {
 194                 arcs_cmdline[0] = '\0';
 195                 argv = (char **) fw_arg1;
 196                 posn = 0;
 197                 for (indx = 1; indx < narg; ++indx) {
 198                         nchr = strlen(argv[indx]);
 199                         if (posn + 1 + nchr + 1 > sizeof(arcs_cmdline))
 200                                 break;
 201                         if (posn)
 202                                 arcs_cmdline[posn++] = ' ';
 203                         strcpy(arcs_cmdline + posn, argv[indx]);
 204                         posn += nchr;
 205                 }
 206         }
 207
 208         add_memory_region(0x0, memsz, BOOT_MEM_RAM);
 209 }
 210
 211 unsigned long __init prom_free_prom_memory(void)
 212 {
 213         /* Nothing to do! */
 214         return 0;
 215 }