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7ca5dc14 FF |
1 | /* |
2 | * Carsten Langgaard, carstenl@mips.com | |
3 | * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can distribute it and/or modify it | |
6 | * under the terms of the GNU General Public License (Version 2) as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
17 | * | |
18 | * Putting things on the screen/serial line using YAMONs facilities. | |
19 | */ | |
20 | #include <linux/init.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/serial_reg.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/string.h> | |
26 | #include <linux/io.h> | |
27 | #include <asm/bootinfo.h> | |
28 | ||
29 | #include <asm/mach-ar7/ar7.h> | |
30 | #include <asm/mach-ar7/prom.h> | |
31 | ||
32 | #define MAX_ENTRY 80 | |
33 | ||
34 | struct env_var { | |
4d1da8c2 AC |
35 | char *name; |
36 | char *value; | |
7ca5dc14 FF |
37 | }; |
38 | ||
39 | static struct env_var adam2_env[MAX_ENTRY]; | |
40 | ||
41 | char *prom_getenv(const char *name) | |
42 | { | |
43 | int i; | |
4d1da8c2 | 44 | |
7ca5dc14 FF |
45 | for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++) |
46 | if (!strcmp(name, adam2_env[i].name)) | |
47 | return adam2_env[i].value; | |
48 | ||
49 | return NULL; | |
50 | } | |
51 | EXPORT_SYMBOL(prom_getenv); | |
52 | ||
7ca5dc14 FF |
53 | static void __init ar7_init_cmdline(int argc, char *argv[]) |
54 | { | |
9feb8367 | 55 | int i; |
7ca5dc14 | 56 | |
9feb8367 YY |
57 | for (i = 1; i < argc; i++) { |
58 | strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE); | |
59 | if (i < (argc - 1)) | |
60 | strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE); | |
7ca5dc14 FF |
61 | } |
62 | } | |
63 | ||
64 | struct psbl_rec { | |
4d1da8c2 AC |
65 | u32 psbl_size; |
66 | u32 env_base; | |
67 | u32 env_size; | |
68 | u32 ffs_base; | |
69 | u32 ffs_size; | |
7ca5dc14 FF |
70 | }; |
71 | ||
edc9ded1 | 72 | static const char psp_env_version[] __initconst = "TIENV0.8"; |
7ca5dc14 FF |
73 | |
74 | struct psp_env_chunk { | |
4d1da8c2 AC |
75 | u8 num; |
76 | u8 ctrl; | |
77 | u16 csum; | |
78 | u8 len; | |
79 | char data[11]; | |
c4a50541 | 80 | } __packed; |
7ca5dc14 FF |
81 | |
82 | struct psp_var_map_entry { | |
4d1da8c2 AC |
83 | u8 num; |
84 | char *value; | |
7ca5dc14 FF |
85 | }; |
86 | ||
edc9ded1 | 87 | static const struct psp_var_map_entry psp_var_map[] = { |
4d1da8c2 AC |
88 | { 1, "cpufrequency" }, |
89 | { 2, "memsize" }, | |
90 | { 3, "flashsize" }, | |
91 | { 4, "modetty0" }, | |
92 | { 5, "modetty1" }, | |
93 | { 8, "maca" }, | |
94 | { 9, "macb" }, | |
95 | { 28, "sysfrequency" }, | |
96 | { 38, "mipsfrequency" }, | |
7ca5dc14 FF |
97 | }; |
98 | ||
99 | /* | |
100 | ||
101 | Well-known variable (num is looked up in table above for matching variable name) | |
102 | Example: cpufrequency=211968000 | |
103 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
104 | | 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF | |
105 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
106 | ||
107 | Name=Value pair in a single chunk | |
108 | Example: NAME=VALUE | |
109 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
110 | | 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0 | |
111 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
112 | ||
113 | Name=Value pair in 2 chunks (len is the number of chunks) | |
114 | Example: bootloaderVersion=1.3.7.15 | |
115 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
116 | | 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V | |
117 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
118 | | _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0 | |
119 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
120 | ||
121 | Data is padded with 0xFF | |
122 | ||
123 | */ | |
124 | ||
125 | #define PSP_ENV_SIZE 4096 | |
126 | ||
127 | static char psp_env_data[PSP_ENV_SIZE] = { 0, }; | |
128 | ||
129 | static char * __init lookup_psp_var_map(u8 num) | |
130 | { | |
131 | int i; | |
132 | ||
ea85a0e4 | 133 | for (i = 0; i < ARRAY_SIZE(psp_var_map); i++) |
7ca5dc14 FF |
134 | if (psp_var_map[i].num == num) |
135 | return psp_var_map[i].value; | |
136 | ||
137 | return NULL; | |
138 | } | |
139 | ||
140 | static void __init add_adam2_var(char *name, char *value) | |
141 | { | |
142 | int i; | |
4d1da8c2 | 143 | |
7ca5dc14 FF |
144 | for (i = 0; i < MAX_ENTRY; i++) { |
145 | if (!adam2_env[i].name) { | |
146 | adam2_env[i].name = name; | |
147 | adam2_env[i].value = value; | |
148 | return; | |
149 | } else if (!strcmp(adam2_env[i].name, name)) { | |
150 | adam2_env[i].value = value; | |
151 | return; | |
152 | } | |
153 | } | |
154 | } | |
155 | ||
156 | static int __init parse_psp_env(void *psp_env_base) | |
157 | { | |
158 | int i, n; | |
159 | char *name, *value; | |
160 | struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data; | |
161 | ||
162 | memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE); | |
163 | ||
164 | i = 1; | |
165 | n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk); | |
166 | while (i < n) { | |
167 | if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n)) | |
168 | break; | |
169 | value = chunks[i].data; | |
170 | if (chunks[i].num) { | |
171 | name = lookup_psp_var_map(chunks[i].num); | |
172 | } else { | |
173 | name = value; | |
174 | value += strlen(name) + 1; | |
175 | } | |
176 | if (name) | |
177 | add_adam2_var(name, value); | |
178 | i += chunks[i].len; | |
179 | } | |
180 | return 0; | |
181 | } | |
182 | ||
183 | static void __init ar7_init_env(struct env_var *env) | |
184 | { | |
185 | int i; | |
186 | struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300)); | |
187 | void *psp_env = (void *)KSEG1ADDR(psbl->env_base); | |
188 | ||
189 | if (strcmp(psp_env, psp_env_version) == 0) { | |
190 | parse_psp_env(psp_env); | |
191 | } else { | |
192 | for (i = 0; i < MAX_ENTRY; i++, env++) | |
193 | if (env->name) | |
194 | add_adam2_var(env->name, env->value); | |
195 | } | |
196 | } | |
197 | ||
198 | static void __init console_config(void) | |
199 | { | |
200 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
201 | char console_string[40]; | |
202 | int baud = 0; | |
203 | char parity = '\0', bits = '\0', flow = '\0'; | |
204 | char *s, *p; | |
205 | ||
9fd4c4f4 | 206 | if (strstr(arcs_cmdline, "console=")) |
7ca5dc14 FF |
207 | return; |
208 | ||
7ca5dc14 FF |
209 | s = prom_getenv("modetty0"); |
210 | if (s) { | |
211 | baud = simple_strtoul(s, &p, 10); | |
212 | s = p; | |
213 | if (*s == ',') | |
214 | s++; | |
215 | if (*s) | |
216 | parity = *s++; | |
217 | if (*s == ',') | |
218 | s++; | |
219 | if (*s) | |
220 | bits = *s++; | |
221 | if (*s == ',') | |
222 | s++; | |
223 | if (*s == 'h') | |
224 | flow = 'r'; | |
225 | } | |
226 | ||
227 | if (baud == 0) | |
228 | baud = 38400; | |
229 | if (parity != 'n' && parity != 'o' && parity != 'e') | |
230 | parity = 'n'; | |
231 | if (bits != '7' && bits != '8') | |
232 | bits = '8'; | |
233 | ||
234 | if (flow == 'r') | |
235 | sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, | |
236 | parity, bits, flow); | |
237 | else | |
238 | sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity, | |
239 | bits); | |
9feb8367 | 240 | strlcat(arcs_cmdline, console_string, COMMAND_LINE_SIZE); |
7ca5dc14 FF |
241 | #endif |
242 | } | |
243 | ||
244 | void __init prom_init(void) | |
245 | { | |
246 | ar7_init_cmdline(fw_arg0, (char **)fw_arg1); | |
247 | ar7_init_env((struct env_var *)fw_arg2); | |
248 | console_config(); | |
3bc6968a FF |
249 | |
250 | ar7_gpio_init(); | |
7ca5dc14 FF |
251 | } |
252 | ||
253 | #define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4))) | |
254 | static inline unsigned int serial_in(int offset) | |
255 | { | |
256 | return readl((void *)PORT(offset)); | |
257 | } | |
258 | ||
259 | static inline void serial_out(int offset, int value) | |
260 | { | |
261 | writel(value, (void *)PORT(offset)); | |
262 | } | |
263 | ||
7ca5dc14 FF |
264 | int prom_putchar(char c) |
265 | { | |
266 | while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0) | |
267 | ; | |
268 | serial_out(UART_TX, c); | |
269 | return 1; | |
270 | } |