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"
83 : "a" (XCHAL_RESET_VECTOR_VADDR
)
87 /* control never gets here */
90 void __init
platform_setup(char** cmdline
)
92 led_print (0, "LINUX ");
95 /* early initialization */
97 void __init
platform_init(bp_tag_t
*first
)
101 /* Heartbeat. Let the LED blink. */
103 void platform_heartbeat(void)
105 static int i
=0, t
= 0;
110 led_print(7, i
? ".": " ");
115 //#define RS_TABLE_SIZE 2
117 #define _SERIAL_PORT(_base,_irq) \
119 .mapbase = (_base), \
120 .membase = (void*)(_base), \
122 .uartclk = DUART16552_XTAL_FREQ, \
123 .iotype = UPIO_MEM, \
124 .flags = UPF_BOOT_AUTOCONF, \
128 static struct plat_serial8250_port xt2000_serial_data
[] = {
130 _SERIAL_PORT(DUART16552_1_ADDR
+ 3, DUART16552_1_INTNUM
),
131 _SERIAL_PORT(DUART16552_2_ADDR
+ 3, DUART16552_2_INTNUM
),
133 _SERIAL_PORT(DUART16552_1_ADDR
, DUART16552_1_INTNUM
),
134 _SERIAL_PORT(DUART16552_2_ADDR
, DUART16552_2_INTNUM
),
139 static struct platform_device xt2000_serial8250_device
= {
140 .name
= "serial8250",
141 .id
= PLAT8250_DEV_PLATFORM
,
143 .platform_data
= xt2000_serial_data
,
147 static struct resource xt2000_sonic_res
[] = {
149 .start
= SONIC83934_ADDR
,
150 .end
= SONIC83934_ADDR
+ 0xff,
151 .flags
= IORESOURCE_MEM
,
154 .start
= SONIC83934_INTNUM
,
155 .end
= SONIC83934_INTNUM
,
156 .flags
= IORESOURCE_IRQ
,
160 static struct platform_device xt2000_sonic_device
= {
162 .num_resources
= ARRAY_SIZE(xt2000_sonic_res
),
163 .resource
= xt2000_sonic_res
,
166 static int __init
xt2000_setup_devinit(void)
168 platform_device_register(&xt2000_serial8250_device
);
169 platform_device_register(&xt2000_sonic_device
);
174 device_initcall(xt2000_setup_devinit
);