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 35 int cobalt_board_id; 36 37 const char *get_system_type(void) 38 { 39 switch (cobalt_board_id) { 40 case COBALT_BRD_ID_QUBE1: 41 return "Cobalt Qube"; 42 case COBALT_BRD_ID_RAQ1: 43 return "Cobalt RaQ"; 44 case COBALT_BRD_ID_QUBE2: 45 return "Cobalt Qube2"; 46 case COBALT_BRD_ID_RAQ2: 47 return "Cobalt RaQ2"; 48 } 49 return "MIPS Cobalt"; 50 } 51 52 static void __init cobalt_timer_setup(struct irqaction *irq) 53 { 54 /* Load timer value for 1KHz (TCLK is 50MHz) */ 55 GALILEO_OUTL(50*1000*1000 / 1000, GT_TC0_OFS); 56 57 /* Enable timer */ 58 GALILEO_OUTL(GALILEO_ENTC0 | GALILEO_SELTC0, GT_TC_CONTROL_OFS); 59 60 /* Register interrupt */ 61 setup_irq(COBALT_GALILEO_IRQ, irq); 62 63 /* Enable interrupt */ 64 GALILEO_OUTL(GALILEO_INTR_T0EXP | GALILEO_INL(GT_INTRMASK_OFS), GT_INTRMASK_OFS); 65 } 66 67 extern struct pci_ops gt64111_pci_ops; 68 69 static struct resource cobalt_mem_resource = { 70 "PCI memory", GT64111_MEM_BASE, GT64111_MEM_END, IORESOURCE_MEM 71 }; 72 73 static struct resource cobalt_io_resource = { 74 "PCI I/O", 0x1000, 0xffff, IORESOURCE_IO 75 }; 76 77 static struct resource cobalt_io_resources[] = { 78 { "dma1", 0x00, 0x1f, IORESOURCE_BUSY }, 79 { "timer", 0x40, 0x5f, IORESOURCE_BUSY }, 80 { "keyboard", 0x60, 0x6f, IORESOURCE_BUSY }, 81 { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY }, 82 { "dma2", 0xc0, 0xdf, IORESOURCE_BUSY }, 83 }; 84 85 #define COBALT_IO_RESOURCES (sizeof(cobalt_io_resources)/sizeof(struct resource)) 86 87 static struct pci_controller cobalt_pci_controller = { 88 .pci_ops = >64111_pci_ops, 89 .mem_resource = &cobalt_mem_resource, 90 .mem_offset = 0, 91 .io_resource = &cobalt_io_resource, 92 .io_offset = 0 - GT64111_IO_BASE 93 }; 94 95 void __init plat_setup(void) 96 { 97 static struct uart_port uart; 98 unsigned int devfn = PCI_DEVFN(COBALT_PCICONF_VIA, 0); 99 int i; 100 101 _machine_restart = cobalt_machine_restart; 102 _machine_halt = cobalt_machine_halt; 103 pm_power_off = cobalt_machine_power_off; 104 105 board_timer_setup = cobalt_timer_setup; 106 107 set_io_port_base(CKSEG1ADDR(GT64111_IO_BASE)); 108 109 /* I/O port resource must include UART and LCD/buttons */ 110 ioport_resource.end = 0x0fffffff; 111 112 /* 113 * This is a prom style console. We just poke at the 114 * UART to make it talk. 115 * Only use this console if you really screw up and can't 116 * get to the stage of setting up a real serial console. 117 */ 118 /*ns16550_setup_console();*/ 119 120 /* request I/O space for devices used on all i[345]86 PCs */ 121 for (i = 0; i < COBALT_IO_RESOURCES; i++) 122 request_resource(&ioport_resource, cobalt_io_resources + i); 123 124 /* Read the cobalt id register out of the PCI config space */ 125 PCI_CFG_SET(devfn, (VIA_COBALT_BRD_ID_REG & ~0x3)); 126 cobalt_board_id = GALILEO_INL(GT_PCI0_CFGDATA_OFS); 127 cobalt_board_id >>= ((VIA_COBALT_BRD_ID_REG & 3) * 8); 128 cobalt_board_id = VIA_COBALT_BRD_REG_to_ID(cobalt_board_id); 129 130 printk("Cobalt board ID: %d\n", cobalt_board_id); 131 132 #ifdef CONFIG_PCI 133 register_pci_controller(&cobalt_pci_controller); 134 #endif 135 136 #ifdef CONFIG_SERIAL_8250 137 if (cobalt_board_id > COBALT_BRD_ID_RAQ1) { 138 139 uart.line = 0; 140 uart.type = PORT_UNKNOWN; 141 uart.uartclk = 18432000; 142 uart.irq = COBALT_SERIAL_IRQ; 143 uart.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST; 144 uart.iobase = 0xc800000; 145 uart.iotype = UPIO_PORT; 146 147 early_serial_setup(&uart); 148 } 149 #endif 150 } 151 152 /* 153 * Prom init. We read our one and only communication with the firmware. 154 * Grab the amount of installed memory. 155 * Better boot loaders (CoLo) pass a command line too :-) 156 */ 157 158 void __init prom_init(void) 159 { 160 int narg, indx, posn, nchr; 161 unsigned long memsz; 162 char **argv; 163 164 mips_machgroup = MACH_GROUP_COBALT; 165 166 memsz = fw_arg0 & 0x7fff0000; 167 narg = fw_arg0 & 0x0000ffff; 168 169 if (narg) { 170 arcs_cmdline[0] = '\0'; 171 argv = (char **) fw_arg1; 172 posn = 0; 173 for (indx = 1; indx < narg; ++indx) { 174 nchr = strlen(argv[indx]); 175 if (posn + 1 + nchr + 1 > sizeof(arcs_cmdline)) 176 break; 177 if (posn) 178 arcs_cmdline[posn++] = ' '; 179 strcpy(arcs_cmdline + posn, argv[indx]); 180 posn += nchr; 181 } 182 } 183 184 add_memory_region(0x0, memsz, BOOT_MEM_RAM); 185 } 186 187 unsigned long __init prom_free_prom_memory(void) 188 { 189 /* Nothing to do! */ 190 return 0; 191 } 192