xtensa: Add xt2000 support files.
[linux-2.6.git] / arch / xtensa / platforms / xt2000 / setup.c
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);