2 * setup.c: Setup pointers to hardware dependent routines.
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
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>
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>
20 #include <asm/bootinfo.h>
21 #include <asm/reboot.h>
23 #include <asm/gt64120.h>
25 unsigned long gt64120_base = KSEG1ADDR(0x14000000);
27 #ifdef WRPPMC_EARLY_DEBUG
29 static volatile unsigned char * wrppmc_led = \
30 (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
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)
38 void wrppmc_led_on(int mask)
40 unsigned char value = *wrppmc_led;
42 value &= (0xF8 | mask);
46 /* If mask = 0, turn off all LEDs */
47 void wrppmc_led_off(int mask)
49 unsigned char value = *wrppmc_led;
51 value |= (0x7 & mask);
56 * We assume that bootloader has initialized UART16550 correctly
58 void __init wrppmc_early_putc(char ch)
60 static volatile unsigned char *wrppmc_uart = \
61 (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
64 /* Wait until Transmit-Holding-Register is empty */
66 value = *(wrppmc_uart + 5);
74 void __init wrppmc_early_printk(const char *fmt, ...)
76 static char pbuf[256] = {'\0', };
83 i = vsprintf(pbuf, fmt, args);
86 /* Print the string */
88 wrppmc_early_putc(*ch);
89 /* if print '\n', also print '\r' */
91 wrppmc_early_putc('\r');
94 #endif /* WRPPMC_EARLY_DEBUG */
96 void __init prom_free_prom_memory(void)
100 #ifdef CONFIG_SERIAL_8250
101 static void wrppmc_setup_serial(void)
105 memset(&up, 0x00, sizeof(struct uart_port));
108 * A note about mapbase/membase
109 * -) mapbase is the physical address of the IO port.
110 * -) membase is an 'ioremapped' cookie.
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 */;
122 early_serial_setup(&up);
126 void __init plat_mem_setup(void)
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);
133 _machine_restart = wrppmc_machine_restart;
134 _machine_halt = wrppmc_machine_halt;
135 pm_power_off = wrppmc_machine_power_off;
137 /* Use MIPS Count/Compare Timer */
138 board_time_init = wrppmc_time_init;
140 /* This makes the operations of 'in/out[bwl]' to the
141 * physical address ( < KSEG0) can work via KSEG1
143 set_io_port_base(KSEG1);
145 #ifdef CONFIG_SERIAL_8250
146 wrppmc_setup_serial();
150 const char *get_system_type(void)
152 return "Wind River PPMC (GT64120)";
156 * Initializes basic routines and structures pointers, memory size (as
157 * given by the bios and saves the command line.
159 void __init prom_init(void)
161 mips_machgroup = MACH_GROUP_WINDRIVER;
162 mips_machtype = MACH_WRPPMC;
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);
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));