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 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 17 #include <asm/bootinfo.h> 18 #include <asm/time.h> 19 #include <asm/io.h> 20 #include <asm/irq.h> 21 #include <asm/processor.h> 22 #include <asm/reboot.h> 23 #include <asm/gt64120.h> 24 25 #include <asm/cobalt/cobalt.h> 26 27 extern void cobalt_machine_restart(char *command); 28 extern void cobalt_machine_halt(void); 29 extern void cobalt_machine_power_off(void); 30 31 int cobalt_board_id; 32 33 static char my_cmdline[CL_SIZE] = { 34 "console=ttyS0,115200 " 35 #ifdef CONFIG_IP_PNP 36 "ip=on " 37 #endif 38 #ifdef CONFIG_ROOT_NFS 39 "root=/dev/nfs " 40 #else 41 "root=/dev/hda1 " 42 #endif 43 }; 44 45 const char *get_system_type(void) 46 { 47 return "MIPS Cobalt"; 48 } 49 50 static void __init cobalt_timer_setup(struct irqaction *irq) 51 { 52 /* Load timer value for 150 Hz */ 53 GALILEO_OUTL(500000, GT_TC0_OFS); 54 55 /* Register our timer interrupt */ 56 setup_irq(COBALT_TIMER_IRQ, irq); 57 58 /* Enable timer ints */ 59 GALILEO_OUTL((GALILEO_ENTC0 | GALILEO_SELTC0), GT_TC_CONTROL_OFS); 60 /* Unmask timer int */ 61 GALILEO_OUTL(0x100, GT_INTRMASK_OFS); 62 } 63 64 extern struct pci_ops gt64111_pci_ops; 65 66 static struct resource cobalt_mem_resource = { 67 "GT64111 PCI MEM", GT64111_IO_BASE, 0xffffffffUL, IORESOURCE_MEM 68 }; 69 70 static struct resource cobalt_io_resource = { 71 "GT64111 IO MEM", 0x00001000UL, 0x0fffffffUL, IORESOURCE_IO 72 }; 73 74 static struct resource cobalt_io_resources[] = { 75 { "dma1", 0x00, 0x1f, IORESOURCE_BUSY }, 76 { "timer", 0x40, 0x5f, IORESOURCE_BUSY }, 77 { "keyboard", 0x60, 0x6f, IORESOURCE_BUSY }, 78 { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY }, 79 { "dma2", 0xc0, 0xdf, IORESOURCE_BUSY }, 80 }; 81 82 #define COBALT_IO_RESOURCES (sizeof(cobalt_io_resources)/sizeof(struct resource)) 83 84 static struct pci_controller cobalt_pci_controller = { 85 .pci_ops = >64111_pci_ops, 86 .mem_resource = &cobalt_mem_resource, 87 .mem_offset = 0, 88 .io_resource = &cobalt_io_resource, 89 .io_offset = 0x00001000UL - GT64111_IO_BASE 90 }; 91 92 static void __init cobalt_setup(void) 93 { 94 unsigned int devfn = PCI_DEVFN(COBALT_PCICONF_VIA, 0); 95 int i; 96 97 _machine_restart = cobalt_machine_restart; 98 _machine_halt = cobalt_machine_halt; 99 _machine_power_off = cobalt_machine_power_off; 100 101 board_timer_setup = cobalt_timer_setup; 102 103 set_io_port_base(KSEG1ADDR(GT64111_IO_BASE)); 104 105 /* 106 * This is a prom style console. We just poke at the 107 * UART to make it talk. 108 * Only use this console if you really screw up and can't 109 * get to the stage of setting up a real serial console. 110 */ 111 /*ns16550_setup_console();*/ 112 113 /* request I/O space for devices used on all i[345]86 PCs */ 114 for (i = 0; i < COBALT_IO_RESOURCES; i++) 115 request_resource(&ioport_resource, cobalt_io_resources + i); 116 117 /* Read the cobalt id register out of the PCI config space */ 118 PCI_CFG_SET(devfn, (VIA_COBALT_BRD_ID_REG & ~0x3)); 119 cobalt_board_id = GALILEO_INL(GT_PCI0_CFGDATA_OFS); 120 cobalt_board_id >>= ((VIA_COBALT_BRD_ID_REG & 3) * 8); 121 cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(cobalt_board_id); 122 123 #ifdef CONFIG_PCI 124 register_pci_controller(&cobalt_pci_controller); 125 #endif 126 } 127 128 early_initcall(cobalt_setup); 129 130 /* 131 * Prom init. We read our one and only communication with the firmware. 132 * Grab the amount of installed memory 133 */ 134 135 void __init prom_init(void) 136 { 137 int argc = fw_arg0; 138 139 strcpy(arcs_cmdline, my_cmdline); 140 141 mips_machgroup = MACH_GROUP_COBALT; 142 143 add_memory_region(0x0, argc & 0x7fffffff, BOOT_MEM_RAM); 144 } 145 146 unsigned long __init prom_free_prom_memory(void) 147 { 148 /* Nothing to do! */ 149 return 0; 150 } 151