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 
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 
49 void platform_halt(void)
50 {
51 	led_print (0, "  HALT  ");
52 	local_irq_disable();
53 	while (1);
54 }
55 
56 void platform_power_off(void)
57 {
58 	led_print (0, "POWEROFF");
59 	local_irq_disable();
60 	while (1);
61 }
62 
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 
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 
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 
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 
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