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8fa5723a CZ |
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" | |
bc5378fc | 69 | "wsr a2, icountlevel\n\t" |
8fa5723a | 70 | "movi a2, 0\n\t" |
bc5378fc | 71 | "wsr a2, icount\n\t" |
d83ff0bb | 72 | #if XCHAL_NUM_IBREAK > 0 |
bc5378fc | 73 | "wsr a2, ibreakenable\n\t" |
d83ff0bb | 74 | #endif |
5029615e | 75 | #if XCHAL_HAVE_LOOPS |
bc5378fc | 76 | "wsr a2, lcount\n\t" |
5029615e | 77 | #endif |
8fa5723a | 78 | "movi a2, 0x1f\n\t" |
bc5378fc | 79 | "wsr a2, ps\n\t" |
8fa5723a CZ |
80 | "isync\n\t" |
81 | "jx %0\n\t" | |
82 | : | |
83 | : "a" (XCHAL_RESET_VECTOR_VADDR) | |
84 | : "a2" | |
85 | ); | |
86 | ||
87 | /* control never gets here */ | |
88 | } | |
89 | ||
90 | void __init platform_setup(char** cmdline) | |
91 | { | |
92 | led_print (0, "LINUX "); | |
93 | } | |
94 | ||
95 | /* early initialization */ | |
96 | ||
cfe8255f | 97 | void __init platform_init(bp_tag_t *first) |
8fa5723a | 98 | { |
8fa5723a CZ |
99 | } |
100 | ||
101 | /* Heartbeat. Let the LED blink. */ | |
102 | ||
103 | void platform_heartbeat(void) | |
104 | { | |
105 | static int i=0, t = 0; | |
106 | ||
107 | if (--t < 0) | |
108 | { | |
109 | t = 59; | |
110 | led_print(7, i ? ".": " "); | |
111 | i ^= 1; | |
112 | } | |
113 | } | |
114 | ||
115 | //#define RS_TABLE_SIZE 2 | |
116 | //#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF|ASYNC_SKIP_TEST) | |
117 | ||
118 | #define _SERIAL_PORT(_base,_irq) \ | |
119 | { \ | |
120 | .mapbase = (_base), \ | |
121 | .membase = (void*)(_base), \ | |
122 | .irq = (_irq), \ | |
123 | .uartclk = DUART16552_XTAL_FREQ, \ | |
124 | .iotype = UPIO_MEM, \ | |
125 | .flags = UPF_BOOT_AUTOCONF, \ | |
126 | .regshift = 2, \ | |
127 | } | |
128 | ||
129 | static struct plat_serial8250_port xt2000_serial_data[] = { | |
130 | #if XCHAL_HAVE_BE | |
131 | _SERIAL_PORT(DUART16552_1_ADDR + 3, DUART16552_1_INTNUM), | |
132 | _SERIAL_PORT(DUART16552_2_ADDR + 3, DUART16552_2_INTNUM), | |
133 | #else | |
134 | _SERIAL_PORT(DUART16552_1_ADDR, DUART16552_1_INTNUM), | |
135 | _SERIAL_PORT(DUART16552_2_ADDR, DUART16552_2_INTNUM), | |
136 | #endif | |
137 | { } | |
138 | }; | |
139 | ||
140 | static struct platform_device xt2000_serial8250_device = { | |
141 | .name = "serial8250", | |
142 | .id = PLAT8250_DEV_PLATFORM, | |
143 | .dev = { | |
144 | .platform_data = xt2000_serial_data, | |
145 | }, | |
146 | }; | |
147 | ||
148 | static struct resource xt2000_sonic_res[] = { | |
149 | { | |
150 | .start = SONIC83934_ADDR, | |
151 | .end = SONIC83934_ADDR + 0xff, | |
152 | .flags = IORESOURCE_MEM, | |
153 | }, | |
154 | { | |
155 | .start = SONIC83934_INTNUM, | |
156 | .end = SONIC83934_INTNUM, | |
157 | .flags = IORESOURCE_IRQ, | |
158 | }, | |
159 | }; | |
160 | ||
161 | static struct platform_device xt2000_sonic_device = { | |
162 | .name = "xtsonic", | |
163 | .num_resources = ARRAY_SIZE(xt2000_sonic_res), | |
164 | .resource = xt2000_sonic_res, | |
165 | }; | |
166 | ||
167 | static int __init xt2000_setup_devinit(void) | |
168 | { | |
169 | platform_device_register(&xt2000_serial8250_device); | |
170 | platform_device_register(&xt2000_sonic_device); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
175 | device_initcall(xt2000_setup_devinit); |