1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
* Copyright (C) 2006 FON Technology, SL.
* Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
*/
/*
* Platform devices for Atheros SoCs
*/
#include <linux/autoconf.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/random.h>
#include <asm/bootinfo.h>
#include <asm/irq_cpu.h>
#include <asm/io.h>
#include <ar531x.h>
char *board_config = NULL;
char *radio_config = NULL;
int broken_boarddata = 0;
extern int early_serial_setup(struct uart_port *port);
static inline bool
check_radio_magic(unsigned char *addr)
{
addr += 0x7a; /* offset for flash magic */
if ((addr[0] == 0x5a) && (addr[1] == 0xa5)) {
return 1;
}
return 0;
}
static inline bool
check_board_data(unsigned char *flash_limit, unsigned char *addr, bool broken)
{
/* config magic found */
if ( *(int *)addr == 0x35333132)
return 1;
if (!broken)
return 0;
if (check_radio_magic(addr + 0xf8))
radio_config = addr + 0xf8;
if ((addr < flash_limit + 0x10000) &&
check_radio_magic(addr + 0x10000))
radio_config = addr + 0x10000;
if (radio_config) {
/* broken board data detected, use radio data to find the offset,
* user will fix this */
broken_boarddata = 1;
return 1;
}
return 0;
}
static u8 *find_board_config(char *flash_limit, bool broken)
{
char *addr;
int found = 0;
for (addr = (char *) (flash_limit - 0x1000);
addr >= (char *) (flash_limit - 0x30000);
addr -= 0x1000) {
if (check_board_data(flash_limit, addr, broken)) {
found = 1;
break;
}
}
if (!found)
addr = NULL;
return addr;
}
static u8 *find_radio_config(char *flash_limit, char *board_config)
{
int dataFound;
char *radio_config;
/*
* Now find the start of Radio Configuration data, using heuristics:
* Search forward from Board Configuration data by 0x1000 bytes
* at a time until we find non-0xffffffff.
*/
dataFound = 0;
for (radio_config = board_config + 0x1000;
(radio_config < flash_limit);
radio_config += 0x1000) {
if ((*(u32 *)radio_config != 0xffffffff) &&
check_radio_magic(radio_config)) {
dataFound = 1;
break;
}
}
#ifdef CONFIG_ATHEROS_AR5315
if (!dataFound) { /* AR2316 relocates radio config to new location */
for (radio_config = board_config + 0xf8;
(radio_config < flash_limit - 0x1000 + 0xf8);
radio_config += 0x1000) {
if ((*(u32 *)radio_config != 0xffffffff) &&
check_radio_magic(radio_config)) {
dataFound = 1;
break;
}
}
}
#endif
if (!dataFound) {
printk("Could not find Radio Configuration data\n");
radio_config = 0;
}
return (u8 *) radio_config;
}
int __init ar531x_find_config(char *flash_limit)
{
struct ar531x_boarddata *bd;
unsigned int rcfg_size;
char *bcfg, *rcfg;
/* Copy the board and radio data to RAM, because with the new
* spiflash driver, accessing the mapped memory directly is no
* longer safe */
bcfg = find_board_config(flash_limit, false);
if (!bcfg)
bcfg = find_board_config(flash_limit, true);
if (!bcfg) {
printk("WARNING: No board configuration data found!\n");
return -ENODEV;
}
board_config = kzalloc(BOARD_CONFIG_BUFSZ, GFP_KERNEL);
memcpy(board_config, bcfg, 0x100);
if (broken_boarddata) {
printk("WARNING: broken board data detected\n");
bd = (struct ar531x_boarddata *)board_config;
if (!memcmp(bd->enet0Mac, "\x00\x00\x00\x00\x00\x00", 6)) {
printk("Fixing up empty mac addresses\n");
bd->enet0Mac[1] = 0x13;
bd->enet0Mac[2] = 0x37;
get_random_bytes(bd->enet0Mac + 3, 3);
bd->wlan0Mac[1] = 0x13;
bd->wlan0Mac[2] = 0x37;
get_random_bytes(bd->wlan0Mac + 3, 3);
}
}
/* Radio config starts 0x100 bytes after board config, regardless
* of what the physical layout on the flash chip looks like */
if (radio_config)
rcfg = radio_config;
else
rcfg = find_radio_config(flash_limit, bcfg);
if (!rcfg)
return -ENODEV;
radio_config = board_config + 0x100 + ((rcfg - bcfg) & 0xfff);
printk("Radio config found at offset 0x%x(0x%x)\n", rcfg - bcfg, radio_config - board_config);
rcfg_size = BOARD_CONFIG_BUFSZ - (radio_config - board_config);
memcpy(radio_config, rcfg, rcfg_size);
return 0;
}
void __init serial_setup(unsigned long mapbase, unsigned int uartclk)
{
struct uart_port s;
memset(&s, 0, sizeof(s));
s.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
s.iotype = UPIO_MEM;
s.irq = AR531X_MISC_IRQ_UART0;
s.regshift = 2;
s.mapbase = mapbase;
s.uartclk = uartclk;
s.membase = (void __iomem *)s.mapbase;
early_serial_setup(&s);
}
void __init plat_mem_setup(void)
{
DO_AR5312(ar5312_plat_setup();)
DO_AR5315(ar5315_plat_setup();)
/* Disable data watchpoints */
write_c0_watchlo0(0);
}
const char *get_system_type(void)
{
switch (mips_machtype) {
#ifdef CONFIG_ATHEROS_AR5312
case MACH_ATHEROS_AR5312:
return "Atheros AR5312";
case MACH_ATHEROS_AR2312:
return "Atheros AR2312";
case MACH_ATHEROS_AR2313:
return "Atheros AR2313";
#endif
#ifdef CONFIG_ATHEROS_AR5315
case MACH_ATHEROS_AR2315:
return "Atheros AR2315";
case MACH_ATHEROS_AR2316:
return "Atheros AR2316";
case MACH_ATHEROS_AR2317:
return "Atheros AR2317";
case MACH_ATHEROS_AR2318:
return "Atheros AR2318";
#endif
}
return "Atheros (unknown)";
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24))
void __init plat_timer_setup(struct irqaction *irq)
{
unsigned int count;
/* Usually irq is timer_irqaction (timer_interrupt) */
setup_irq(AR531X_IRQ_CPU_CLOCK, irq);
/* to generate the first CPU timer interrupt */
count = read_c0_count();
write_c0_compare(count + 1000);
}
#endif
asmlinkage void plat_irq_dispatch(void)
{
DO_AR5312(ar5312_irq_dispatch();)
DO_AR5315(ar5315_irq_dispatch();)
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24))
void (*board_time_init)(void);
void __init plat_time_init(void) {
board_time_init();
}
#endif
void __init arch_init_irq(void)
{
clear_c0_status(ST0_IM);
mips_cpu_irq_init();
/* Initialize interrupt controllers */
DO_AR5312(ar5312_misc_intr_init(AR531X_MISC_IRQ_BASE);)
DO_AR5315(ar5315_misc_intr_init(AR531X_MISC_IRQ_BASE);)
}
static int __init ar531x_register_gpiodev(void)
{
static struct resource res = {
.start = 0xFFFFFFFF,
};
struct platform_device *pdev;
printk(KERN_INFO "ar531x: Registering GPIODEV device\n");
pdev = platform_device_register_simple("GPIODEV", 0, &res, 1);
if (!pdev) {
printk(KERN_ERR "ar531x: GPIODEV init failed\n");
return -ENODEV;
}
return 0;
}
device_initcall(ar531x_register_gpiodev);
|
