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
22 unsigned long gt64120_base = KSEG1ADDR(0x14000000);
23
24 #ifdef WRPPMC_EARLY_DEBUG
25
26 static 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 */
wrppmc_led_on(int mask)35 void 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 */
wrppmc_led_off(int mask)44 void 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 */
wrppmc_early_putc(char ch)55 void __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
wrppmc_early_printk(const char * fmt,...)71 void __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
prom_free_prom_memory(void)93 void __init prom_free_prom_memory(void)
94 {
95 }
96
plat_mem_setup(void)97 void __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
get_system_type(void)112 const 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 */
prom_init(void)121 void __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 }
129