2 * arch/xtensa/platforms/xt2000/setup.c
4 * Platform specific functions for the XT2000 board.
6 * Authors: Chris Zankel <chris@zankel.net>
7 * Joe Taylor <joe@tensilica.com>
9 * Copyright 2001 - 2004 Tensilica Inc.
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.
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>
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>
38 /* Assumes s points to an 8-chr string. No checking for NULL. */
40 static void led_print (int f, char *s)
42 unsigned long* led_addr = (unsigned long*) (XT2000_LED_ADDR + 0xE0) + f;
44 for (i = f; i < 8; i++)
45 if ((*led_addr++ = *s++) == 0)
49 void platform_halt(void)
51 led_print (0, " HALT ");
56 void platform_power_off(void)
58 led_print (0, "POWEROFF");
63 void platform_restart(void)
65 /* Flush and reset the mmu, simulate a processor reset, and
66 * jump to the reset vector. */
68 __asm__ __volatile__ ("movi a2, 15\n\t"
69 "wsr a2, icountlevel\n\t"
72 #if XCHAL_NUM_IBREAK > 0
73 "wsr a2, ibreakenable\n\t"
81 : "a" (XCHAL_RESET_VECTOR_VADDR)
85 /* control never gets here */
88 void __init platform_setup(char** cmdline)
90 led_print (0, "LINUX ");
93 /* early initialization */
95 void __init platform_init(bp_tag_t *first)
99 /* Heartbeat. Let the LED blink. */
101 void platform_heartbeat(void)
103 static int i=0, t = 0;
108 led_print(7, i ? ".": " ");
113 //#define RS_TABLE_SIZE 2
114 //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST)
116 #define _SERIAL_PORT(_base,_irq) \
118 .mapbase = (_base), \
119 .membase = (void*)(_base), \
121 .uartclk = DUART16552_XTAL_FREQ, \
122 .iotype = UPIO_MEM, \
123 .flags = UPF_BOOT_AUTOCONF, \
127 static struct plat_serial8250_port xt2000_serial_data[] = {
129 _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM),
130 _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM),
132 _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM),
133 _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM),
138 static struct platform_device xt2000_serial8250_device = {
139 .name = "serial8250",
140 .id = PLAT8250_DEV_PLATFORM,
142 .platform_data = xt2000_serial_data,
146 static struct resource xt2000_sonic_res[] = {
148 .start = SONIC83934_ADDR,
149 .end = SONIC83934_ADDR + 0xff,
150 .flags = IORESOURCE_MEM,
153 .start = SONIC83934_INTNUM,
154 .end = SONIC83934_INTNUM,
155 .flags = IORESOURCE_IRQ,
159 static struct platform_device xt2000_sonic_device = {
161 .num_resources = ARRAY_SIZE(xt2000_sonic_res),
162 .resource = xt2000_sonic_res,
165 static int __init xt2000_setup_devinit(void)
167 platform_device_register(&xt2000_serial8250_device);
168 platform_device_register(&xt2000_sonic_device);
173 device_initcall(xt2000_setup_devinit);