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, icountlevel\n\t"
70 			      "movi	a2, 0\n\t"
71 			      "wsr	a2, icount\n\t"
72 #if XCHAL_NUM_IBREAK > 0
73 			      "wsr	a2, ibreakenable\n\t"
74 #endif
75 			      "wsr	a2, lcount\n\t"
76 			      "movi	a2, 0x1f\n\t"
77 			      "wsr	a2, ps\n\t"
78 			      "isync\n\t"
79 			      "jx	%0\n\t"
80 			      :
81 			      : "a" (XCHAL_RESET_VECTOR_VADDR)
82 			      : "a2"
83 			      );
84 
85 	/* control never gets here */
86 }
87 
88 void __init platform_setup(char** cmdline)
89 {
90 	led_print (0, "LINUX   ");
91 }
92 
93 /* early initialization */
94 
95 extern sysmem_info_t __initdata sysmem;
96 
97 void platform_init(bp_tag_t* first)
98 {
99 	/* Set default memory block if not provided by the bootloader. */
100 
101 	if (sysmem.nr_banks == 0) {
102 		sysmem.nr_banks = 1;
103 		sysmem.bank[0].start = PLATFORM_DEFAULT_MEM_START;
104 		sysmem.bank[0].end = PLATFORM_DEFAULT_MEM_START
105 				     + PLATFORM_DEFAULT_MEM_SIZE;
106 	}
107 }
108 
109 /* Heartbeat. Let the LED blink. */
110 
111 void platform_heartbeat(void)
112 {
113 	static int i=0, t = 0;
114 
115 	if (--t < 0)
116 	{
117 		t = 59;
118 		led_print(7, i ? ".": " ");
119 		i ^= 1;
120 	}
121 }
122 
123 //#define RS_TABLE_SIZE 2
124 //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
125 
126 #define _SERIAL_PORT(_base,_irq)					\
127 {									\
128 	.mapbase	= (_base),					\
129 	.membase	= (void*)(_base),				\
130 	.irq		= (_irq),					\
131 	.uartclk	= DUART16552_XTAL_FREQ,				\
132 	.iotype		= UPIO_MEM,					\
133 	.flags		= UPF_BOOT_AUTOCONF,				\
134 	.regshift	= 2,						\
135 }
136 
137 static struct plat_serial8250_port xt2000_serial_data[] = {
138 #if XCHAL_HAVE_BE
139 	_SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
140 	_SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
141 #else
142 	_SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
143 	_SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
144 #endif
145 	{ }
146 };
147 
148 static struct platform_device xt2000_serial8250_device = {
149 	.name		= "serial8250",
150 	.id		= PLAT8250_DEV_PLATFORM,
151 	.dev		= {
152 	    .platform_data = xt2000_serial_data,
153 	},
154 };
155 
156 static struct resource xt2000_sonic_res[] = {
157 	{
158 		.start = SONIC83934_ADDR,
159 		.end   = SONIC83934_ADDR + 0xff,
160 		.flags = IORESOURCE_MEM,
161 	},
162 	{
163 		.start = SONIC83934_INTNUM,
164 		.end = SONIC83934_INTNUM,
165 		.flags = IORESOURCE_IRQ,
166 	},
167 };
168 
169 static struct platform_device xt2000_sonic_device = {
170 	.name		= "xtsonic",
171 	.num_resources	= ARRAY_SIZE(xt2000_sonic_res),
172 	.resource		= xt2000_sonic_res,
173 };
174 
175 static int __init xt2000_setup_devinit(void)
176 {
177 	platform_device_register(&xt2000_serial8250_device);
178 	platform_device_register(&xt2000_sonic_device);
179 
180 	return 0;
181 }
182 
183 device_initcall(xt2000_setup_devinit);
184