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>
17 #include <linux/serial_8250.h>
21 #include <asm/bootinfo.h>
22 #include <asm/reboot.h>
24 #include <asm/gt64120.h>
26 unsigned long gt64120_base = KSEG1ADDR(0x14000000);
28 #ifdef WRPPMC_EARLY_DEBUG
30 static volatile unsigned char * wrppmc_led = \
31 (volatile unsigned char *)KSEG1ADDR(WRPPMC_LED_BASE);
34 * PPMC LED control register:
35 * -) bit[0] controls DS1 LED (1 - OFF, 0 - ON)
36 * -) bit[1] controls DS2 LED (1 - OFF, 0 - ON)
37 * -) bit[2] controls DS4 LED (1 - OFF, 0 - ON)
39 void wrppmc_led_on(int mask)
41 unsigned char value = *wrppmc_led;
43 value &= (0xF8 | mask);
47 /* If mask = 0, turn off all LEDs */
48 void wrppmc_led_off(int mask)
50 unsigned char value = *wrppmc_led;
52 value |= (0x7 & mask);
57 * We assume that bootloader has initialized UART16550 correctly
59 void __init wrppmc_early_putc(char ch)
61 static volatile unsigned char *wrppmc_uart = \
62 (volatile unsigned char *)KSEG1ADDR(WRPPMC_UART16550_BASE);
65 /* Wait until Transmit-Holding-Register is empty */
67 value = *(wrppmc_uart + 5);
75 void __init wrppmc_early_printk(const char *fmt, ...)
77 static char pbuf[256] = {'\0', };
84 i = vsprintf(pbuf, fmt, args);
87 /* Print the string */
89 wrppmc_early_putc(*ch);
90 /* if print '\n', also print '\r' */
92 wrppmc_early_putc('\r');
95 #endif /* WRPPMC_EARLY_DEBUG */
97 void __init prom_free_prom_memory(void)
101 #ifdef CONFIG_SERIAL_8250
102 static void wrppmc_setup_serial(void)
106 memset(&up, 0x00, sizeof(struct uart_port));
109 * A note about mapbase/membase
110 * -) mapbase is the physical address of the IO port.
111 * -) membase is an 'ioremapped' cookie.
114 up.type = PORT_16550;
115 up.iotype = UPIO_MEM;
116 up.mapbase = WRPPMC_UART16550_BASE;
117 up.membase = ioremap(up.mapbase, 8);
118 up.irq = WRPPMC_UART16550_IRQ;
119 up.uartclk = WRPPMC_UART16550_CLOCK;
120 up.flags = UPF_SKIP_TEST/* | UPF_BOOT_AUTOCONF */;
123 early_serial_setup(&up);
127 void __init plat_mem_setup(void)
129 extern void wrppmc_time_init(void);
130 extern void wrppmc_machine_restart(char *command);
131 extern void wrppmc_machine_halt(void);
132 extern void wrppmc_machine_power_off(void);
134 _machine_restart = wrppmc_machine_restart;
135 _machine_halt = wrppmc_machine_halt;
136 pm_power_off = wrppmc_machine_power_off;
138 /* Use MIPS Count/Compare Timer */
139 board_time_init = wrppmc_time_init;
141 /* This makes the operations of 'in/out[bwl]' to the
142 * physical address ( < KSEG0) can work via KSEG1
144 set_io_port_base(KSEG1);
146 #ifdef CONFIG_SERIAL_8250
147 wrppmc_setup_serial();
151 const char *get_system_type(void)
153 return "Wind River PPMC (GT64120)";
157 * Initializes basic routines and structures pointers, memory size (as
158 * given by the bios and saves the command line.
160 void __init prom_init(void)
162 mips_machgroup = MACH_GROUP_WINDRIVER;
163 mips_machtype = MACH_WRPPMC;
165 add_memory_region(WRPPMC_SDRAM_SCS0_BASE, WRPPMC_SDRAM_SCS0_SIZE, BOOT_MEM_RAM);
166 add_memory_region(WRPPMC_BOOTROM_BASE, WRPPMC_BOOTROM_SIZE, BOOT_MEM_ROM_DATA);
168 wrppmc_early_printk("prom_init: GT64120 SDRAM Bank 0: 0x%x - 0x%08lx\n",
169 WRPPMC_SDRAM_SCS0_BASE, (WRPPMC_SDRAM_SCS0_BASE + WRPPMC_SDRAM_SCS0_SIZE));