1 /*
2 * arch/xtensa/platforms/xt2000/setup.c
3 *
4 * Platform specific functions for the XT2000 board.
5 *
6 * Authors: Chris Zankel <chris@zankel.net>
7 * Joe Taylor <joe@tensilica.com>
8 *
9 * Copyright 2001 - 2004 Tensilica Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 */
17 #include <linux/stddef.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/errno.h>
21 #include <linux/reboot.h>
22 #include <linux/kdev_t.h>
23 #include <linux/types.h>
24 #include <linux/major.h>
25 #include <linux/console.h>
26 #include <linux/delay.h>
27 #include <linux/stringify.h>
28 #include <linux/platform_device.h>
29 #include <linux/serial.h>
30 #include <linux/serial_8250.h>
31
32 #include <asm/processor.h>
33 #include <asm/platform.h>
34 #include <asm/bootparam.h>
35 #include <platform/hardware.h>
36 #include <platform/serial.h>
37
38 /* Assumes s points to an 8-chr string. No checking for NULL. */
39
led_print(int f,char * s)40 static void led_print (int f, char *s)
41 {
42 unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
43 int i;
44 for (i = f; i < 8; i++)
45 if ((*led_addr++ = *s++) == 0)
46 break;
47 }
48
platform_halt(void)49 void platform_halt(void)
50 {
51 led_print (0, " HALT ");
52 local_irq_disable();
53 while (1);
54 }
55
platform_power_off(void)56 void platform_power_off(void)
57 {
58 led_print (0, "POWEROFF");
59 local_irq_disable();
60 while (1);
61 }
62
platform_restart(void)63 void platform_restart(void)
64 {
65 /* Flush and reset the mmu, simulate a processor reset, and
66 * jump to the reset vector. */
67
68 __asm__ __volatile__ ("movi a2, 15\n\t"
69 "wsr a2, " __stringify(ICOUNTLEVEL) "\n\t"
70 "movi a2, 0\n\t"
71 "wsr a2, " __stringify(ICOUNT) "\n\t"
72 "wsr a2, " __stringify(IBREAKENABLE) "\n\t"
73 "wsr a2, " __stringify(LCOUNT) "\n\t"
74 "movi a2, 0x1f\n\t"
75 "wsr a2, " __stringify(PS) "\n\t"
76 "isync\n\t"
77 "jx %0\n\t"
78 :
79 : "a" (XCHAL_RESET_VECTOR_VADDR)
80 : "a2"
81 );
82
83 /* control never gets here */
84 }
85
platform_setup(char ** cmdline)86 void __init platform_setup(char** cmdline)
87 {
88 led_print (0, "LINUX ");
89 }
90
91 /* early initialization */
92
93 extern sysmem_info_t __initdata sysmem;
94
platform_init(bp_tag_t * first)95 void platform_init(bp_tag_t* first)
96 {
97 /* Set default memory block if not provided by the bootloader. */
98
99 if (sysmem.nr_banks == 0) {
100 sysmem.nr_banks = 1;
101 sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
102 sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
103 + PLATFORM_DEFAULT_MEM_SIZE;
104 }
105 }
106
107 /* Heartbeat. Let the LED blink. */
108
platform_heartbeat(void)109 void platform_heartbeat(void)
110 {
111 static int i=0, t = 0;
112
113 if (--t < 0)
114 {
115 t = 59;
116 led_print(7, i ? ".": " ");
117 i ^= 1;
118 }
119 }
120
121 //#define RS_TABLE_SIZE 2
122 //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
123
124 #define _SERIAL_PORT(_base,_irq) \
125 { \
126 .mapbase = (_base), \
127 .membase = (void*)(_base), \
128 .irq = (_irq), \
129 .uartclk = DUART16552_XTAL_FREQ, \
130 .iotype = UPIO_MEM, \
131 .flags = UPF_BOOT_AUTOCONF, \
132 .regshift = 2, \
133 }
134
135 static struct plat_serial8250_port xt2000_serial_data[] = {
136 #if XCHAL_HAVE_BE
137 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
138 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
139 #else
140 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
141 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
142 #endif
143 { }
144 };
145
146 static struct platform_device xt2000_serial8250_device = {
147 .name = "serial8250",
148 .id = PLAT8250_DEV_PLATFORM,
149 .dev = {
150 .platform_data = xt2000_serial_data,
151 },
152 };
153
154 static struct resource xt2000_sonic_res[] = {
155 {
156 .start = SONIC83934_ADDR,
157 .end = SONIC83934_ADDR + 0xff,
158 .flags = IORESOURCE_MEM,
159 },
160 {
161 .start = SONIC83934_INTNUM,
162 .end = SONIC83934_INTNUM,
163 .flags = IORESOURCE_IRQ,
164 },
165 };
166
167 static struct platform_device xt2000_sonic_device = {
168 .name = "xtsonic",
169 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
170 .resource = xt2000_sonic_res,
171 };
172
xt2000_setup_devinit(void)173 static int __init xt2000_setup_devinit(void)
174 {
175 platform_device_register(&xt2000_serial8250_device);
176 platform_device_register(&xt2000_sonic_device);
177
178 return 0;
179 }
180
181 device_initcall(xt2000_setup_devinit);
182