mirror of
https://github.com/torvalds/linux
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170 lines
4 KiB
C
170 lines
4 KiB
C
/*
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* setup.c: Setup pointers to hardware dependent routines.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 1997, 2004 by Ralf Baechle (ralf@linux-mips.org)
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* Copyright (C) 2006, Wind River System Inc. Rongkai.zhan <rongkai.zhan@windriver.com>
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*/
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/tty.h>
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#include <linux/serial.h>
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#include <linux/serial_core.h>
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#include <linux/pm.h>
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#include <asm/io.h>
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#include <asm/bootinfo.h>
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#include <asm/reboot.h>
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#include <asm/time.h>
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#include <asm/gt64120.h>
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unsigned long gt64120_base = KSEG1ADDR(0x14000000);
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#ifdef WRPPMC_EARLY_DEBUG
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static volatile unsigned char * wrppmc_led = \
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(volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
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/*
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* PPMC LED control register:
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* -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
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* -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
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* -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
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*/
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void wrppmc_led_on(int mask)
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{
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unsigned char value = *wrppmc_led;
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value &= (0xF8 | mask);
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*wrppmc_led = value;
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}
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/* If mask = 0, turn off all LEDs */
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void wrppmc_led_off(int mask)
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{
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unsigned char value = *wrppmc_led;
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value |= (0x7 & mask);
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*wrppmc_led = value;
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}
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/*
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* We assume that bootloader has initialized UART16550 correctly
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*/
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void __init wrppmc_early_putc(char ch)
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{
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static volatile unsigned char *wrppmc_uart = \
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(volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
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unsigned char value;
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/* Wait until Transmit-Holding-Register is empty */
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while (1) {
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value = *(wrppmc_uart + 5);
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if (value & 0x20)
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break;
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}
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*wrppmc_uart = ch;
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}
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void __init wrppmc_early_printk(const char *fmt, ...)
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{
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static char pbuf[256] = {'\0', };
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char *ch = pbuf;
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va_list args;
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unsigned int i;
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memset(pbuf, 0, 256);
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va_start(args, fmt);
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i = vsprintf(pbuf, fmt, args);
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va_end(args);
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/* Print the string */
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while (*ch != '\0') {
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wrppmc_early_putc(*ch);
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/* if print '\n', also print '\r' */
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if (*ch++ == '\n')
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wrppmc_early_putc('\r');
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}
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}
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#endif /* WRPPMC_EARLY_DEBUG */
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unsigned long __init prom_free_prom_memory(void)
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{
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return 0;
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}
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#ifdef CONFIG_SERIAL_8250
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static void wrppmc_setup_serial(void)
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{
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struct uart_port up;
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memset(&up, 0x00, sizeof(struct uart_port));
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/*
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* A note about mapbase/membase
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* -) mapbase is the physical address of the IO port.
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* -) membase is an 'ioremapped' cookie.
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*/
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up.line = 0;
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up.type = PORT_16550;
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up.iotype = UPIO_MEM;
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up.mapbase = WRPPMC_UART16550_BASE;
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up.membase = ioremap(up.mapbase, 8);
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up.irq = WRPPMC_UART16550_IRQ;
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up.uartclk = WRPPMC_UART16550_CLOCK;
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up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */;
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up.regshift = 0;
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early_serial_setup(&up);
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}
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#endif
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void __init plat_mem_setup(void)
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{
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extern void wrppmc_time_init(void);
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extern void wrppmc_machine_restart(char *command);
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extern void wrppmc_machine_halt(void);
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extern void wrppmc_machine_power_off(void);
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_machine_restart = wrppmc_machine_restart;
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_machine_halt = wrppmc_machine_halt;
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pm_power_off = wrppmc_machine_power_off;
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/* Use MIPS Count/Compare Timer */
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board_time_init = wrppmc_time_init;
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/* This makes the operations of 'in/out[bwl]' to the
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* physical address ( < KSEG0) can work via KSEG1
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*/
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set_io_port_base(KSEG1);
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#ifdef CONFIG_SERIAL_8250
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wrppmc_setup_serial();
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#endif
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}
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const char *get_system_type(void)
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{
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return "Wind River PPMC (GT64120)";
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}
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/*
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* Initializes basic routines and structures pointers, memory size (as
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* given by the bios and saves the command line.
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*/
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void __init prom_init(void)
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{
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mips_machgroup = MACH_GROUP_GALILEO;
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mips_machtype = MACH_EV64120A;
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add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
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add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
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wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
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WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
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}
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