1/* 2 * setup.c: 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) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com> 10 */ 11#include <linux/init.h> 12#include <linux/string.h> 13#include <linux/kernel.h> 14#include <linux/tty.h> 15#include <linux/serial.h> 16#include <linux/serial_core.h> 17#include <linux/pm.h> 18 19#include <asm/io.h> 20#include <asm/bootinfo.h> 21#include <asm/reboot.h> 22#include <asm/time.h> 23#include <asm/gt64120.h> 24 25unsigned long gt64120_base = KSEG1ADDR(0x14000000); 26 27#ifdef WRPPMC_EARLY_DEBUG 28 29static volatile unsigned char * wrppmc_led = \ 30 (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE); 31 32/* 33 * PPMC LED control register: 34 * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON) 35 * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON) 36 * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON) 37 */ 38void wrppmc_led_on(int mask) 39{ 40 unsigned char value = *wrppmc_led; 41 42 value &= (0xF8 | mask); 43 *wrppmc_led = value; 44} 45 46/* If mask = 0, turn off all LEDs */ 47void wrppmc_led_off(int mask) 48{ 49 unsigned char value = *wrppmc_led; 50 51 value |= (0x7 & mask); 52 *wrppmc_led = value; 53} 54 55/* 56 * We assume that bootloader has initialized UART16550 correctly 57 */ 58void __init wrppmc_early_putc(char ch) 59{ 60 static volatile unsigned char *wrppmc_uart = \ 61 (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE); 62 unsigned char value; 63 64 /* Wait until Transmit-Holding-Register is empty */ 65 while (1) { 66 value = *(wrppmc_uart + 5); 67 if (value & 0x20) 68 break; 69 } 70 71 *wrppmc_uart = ch; 72} 73 74void __init wrppmc_early_printk(const char *fmt, ...) 75{ 76 static char pbuf[256] = {'\0', }; 77 char *ch = pbuf; 78 va_list args; 79 unsigned int i; 80 81 memset(pbuf, 0, 256); 82 va_start(args, fmt); 83 i = vsprintf(pbuf, fmt, args); 84 va_end(args); 85 86 /* Print the string */ 87 while (*ch != '\0') { 88 wrppmc_early_putc(*ch); 89 /* if print '\n', also print '\r' */ 90 if (*ch++ == '\n') 91 wrppmc_early_putc('\r'); 92 } 93} 94#endif /* WRPPMC_EARLY_DEBUG */ 95 96void __init prom_free_prom_memory(void) 97{ 98} 99 100#ifdef CONFIG_SERIAL_8250 101static void wrppmc_setup_serial(void) 102{ 103 struct uart_port up; 104 105 memset(&up, 0x00, sizeof(struct uart_port)); 106 107 /* 108 * A note about mapbase/membase 109 * -) mapbase is the physical address of the IO port. 110 * -) membase is an 'ioremapped' cookie. 111 */ 112 up.line = 0; 113 up.type = PORT_16550; 114 up.iotype = UPIO_MEM; 115 up.mapbase = WRPPMC_UART16550_BASE; 116 up.membase = ioremap(up.mapbase, 8); 117 up.irq = WRPPMC_UART16550_IRQ; 118 up.uartclk = WRPPMC_UART16550_CLOCK; 119 up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */; 120 up.regshift = 0; 121 122 early_serial_setup(&up); 123} 124#endif 125 126void __init plat_mem_setup(void) 127{ 128 extern void wrppmc_time_init(void); 129 extern void wrppmc_machine_restart(char *command); 130 extern void wrppmc_machine_halt(void); 131 extern void wrppmc_machine_power_off(void); 132 133 _machine_restart = wrppmc_machine_restart; 134 _machine_halt = wrppmc_machine_halt; 135 pm_power_off = wrppmc_machine_power_off; 136 137 /* Use MIPS Count/Compare Timer */ 138 board_time_init = wrppmc_time_init; 139 140 /* This makes the operations of 'in/out[bwl]' to the 141 * physical address ( < KSEG0) can work via KSEG1 142 */ 143 set_io_port_base(KSEG1); 144 145#ifdef CONFIG_SERIAL_8250 146 wrppmc_setup_serial(); 147#endif 148} 149 150const char *get_system_type(void) 151{ 152 return "Wind River PPMC (GT64120)"; 153} 154 155/* 156 * Initializes basic routines and structures pointers, memory size (as 157 * given by the bios and saves the command line. 158 */ 159void __init prom_init(void) 160{ 161 mips_machgroup = MACH_GROUP_GALILEO; 162 mips_machtype = MACH_EV64120A; 163 164 add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM); 165 add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA); 166 167 wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n", 168 WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE)); 169} 170