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/pm.h>
 15
 16#include <asm/io.h>
 17#include <asm/bootinfo.h>
 18#include <asm/reboot.h>
 19#include <asm/time.h>
 20#include <asm/gt64120.h>
 21
 22unsigned long gt64120_base = KSEG1ADDR(0x14000000);
 23
 24#ifdef WRPPMC_EARLY_DEBUG
 25
 26static volatile unsigned char * wrppmc_led = \
 27	(volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
 28
 29/*
 30 * PPMC LED control register:
 31 * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
 32 * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
 33 * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
 34 */
 35void wrppmc_led_on(int mask)
 36{
 37	unsigned char value = *wrppmc_led;
 38
 39	value &= (0xF8 | mask);
 40	*wrppmc_led = value;
 41}
 42
 43/* If mask = 0, turn off all LEDs */
 44void wrppmc_led_off(int mask)
 45{
 46	unsigned char value = *wrppmc_led;
 47
 48	value |= (0x7 & mask);
 49	*wrppmc_led = value;
 50}
 51
 52/*
 53 * We assume that bootloader has initialized UART16550 correctly
 54 */
 55void __init wrppmc_early_putc(char ch)
 56{
 57	static volatile unsigned char *wrppmc_uart = \
 58		(volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
 59	unsigned char value;
 60
 61	/* Wait until Transmit-Holding-Register is empty */
 62	while (1) {
 63		value = *(wrppmc_uart + 5);
 64		if (value & 0x20)
 65			break;
 66	}
 67
 68	*wrppmc_uart = ch;
 69}
 70
 71void __init wrppmc_early_printk(const char *fmt, ...)
 72{
 73	static char pbuf[256] = {'\0', };
 74	char *ch = pbuf;
 75	va_list args;
 76	unsigned int i;
 77
 78	memset(pbuf, 0, 256);
 79	va_start(args, fmt);
 80	i = vsprintf(pbuf, fmt, args);
 81	va_end(args);
 82
 83	/* Print the string */
 84	while (*ch != '\0') {
 85		wrppmc_early_putc(*ch);
 86		/* if print '\n', also print '\r' */
 87		if (*ch++ == '\n')
 88			wrppmc_early_putc('\r');
 89	}
 90}
 91#endif /* WRPPMC_EARLY_DEBUG */
 92
 93void __init prom_free_prom_memory(void)
 94{
 95}
 96
 97void __init plat_mem_setup(void)
 98{
 99	extern void wrppmc_machine_restart(char *command);
100	extern void wrppmc_machine_halt(void);
101
102	_machine_restart = wrppmc_machine_restart;
103	_machine_halt	 = wrppmc_machine_halt;
104	pm_power_off	 = wrppmc_machine_halt;
105
106	/* This makes the operations of 'in/out[bwl]' to the
107	 * physical address ( < KSEG0) can work via KSEG1
108	 */
109	set_io_port_base(KSEG1);
110}
111
112const char *get_system_type(void)
113{
114	return "Wind River PPMC (GT64120)";
115}
116
117/*
118 * Initializes basic routines and structures pointers, memory size (as
119 * given by the bios and saves the command line.
120 */
121void __init prom_init(void)
122{
123	add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
124	add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
125
126	wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
127			WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));
128}