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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 { | |
35 | char *name; | |
36 | char *value; | |
37 | }; | |
38 | ||
39 | static struct env_var adam2_env[MAX_ENTRY]; | |
40 | ||
41 | char *prom_getenv(const char *name) | |
42 | { | |
43 | int i; | |
44 | for (i = 0; (i < MAX_ENTRY) && adam2_env[i].name; i++) | |
45 | if (!strcmp(name, adam2_env[i].name)) | |
46 | return adam2_env[i].value; | |
47 | ||
48 | return NULL; | |
49 | } | |
50 | EXPORT_SYMBOL(prom_getenv); | |
51 | ||
52 | char * __init prom_getcmdline(void) | |
53 | { | |
54 | return &(arcs_cmdline[0]); | |
55 | } | |
56 | ||
57 | static void __init ar7_init_cmdline(int argc, char *argv[]) | |
58 | { | |
59 | char *cp; | |
60 | int actr; | |
61 | ||
62 | actr = 1; /* Always ignore argv[0] */ | |
63 | ||
64 | cp = &(arcs_cmdline[0]); | |
65 | while (actr < argc) { | |
66 | strcpy(cp, argv[actr]); | |
67 | cp += strlen(argv[actr]); | |
68 | *cp++ = ' '; | |
69 | actr++; | |
70 | } | |
71 | if (cp != &(arcs_cmdline[0])) { | |
72 | /* get rid of trailing space */ | |
73 | --cp; | |
74 | *cp = '\0'; | |
75 | } | |
76 | } | |
77 | ||
78 | struct psbl_rec { | |
79 | u32 psbl_size; | |
80 | u32 env_base; | |
81 | u32 env_size; | |
82 | u32 ffs_base; | |
83 | u32 ffs_size; | |
84 | }; | |
85 | ||
86 | static __initdata char psp_env_version[] = "TIENV0.8"; | |
87 | ||
88 | struct psp_env_chunk { | |
89 | u8 num; | |
90 | u8 ctrl; | |
91 | u16 csum; | |
92 | u8 len; | |
93 | char data[11]; | |
94 | } __attribute__ ((packed)); | |
95 | ||
96 | struct psp_var_map_entry { | |
97 | u8 num; | |
98 | char *value; | |
99 | }; | |
100 | ||
101 | static struct psp_var_map_entry psp_var_map[] = { | |
102 | { 1, "cpufrequency" }, | |
103 | { 2, "memsize" }, | |
104 | { 3, "flashsize" }, | |
105 | { 4, "modetty0" }, | |
106 | { 5, "modetty1" }, | |
107 | { 8, "maca" }, | |
108 | { 9, "macb" }, | |
109 | { 28, "sysfrequency" }, | |
110 | { 38, "mipsfrequency" }, | |
111 | }; | |
112 | ||
113 | /* | |
114 | ||
115 | Well-known variable (num is looked up in table above for matching variable name) | |
116 | Example: cpufrequency=211968000 | |
117 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
118 | | 01 |CTRL|CHECKSUM | 01 | _2 | _1 | _1 | _9 | _6 | _8 | _0 | _0 | _0 | \0 | FF | |
119 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
120 | ||
121 | Name=Value pair in a single chunk | |
122 | Example: NAME=VALUE | |
123 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
124 | | 00 |CTRL|CHECKSUM | 01 | _N | _A | _M | _E | _0 | _V | _A | _L | _U | _E | \0 | |
125 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
126 | ||
127 | Name=Value pair in 2 chunks (len is the number of chunks) | |
128 | Example: bootloaderVersion=1.3.7.15 | |
129 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
130 | | 00 |CTRL|CHECKSUM | 02 | _b | _o | _o | _t | _l | _o | _a | _d | _e | _r | _V | |
131 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
132 | | _e | _r | _s | _i | _o | _n | \0 | _1 | _. | _3 | _. | _7 | _. | _1 | _5 | \0 | |
133 | +----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+--- | |
134 | ||
135 | Data is padded with 0xFF | |
136 | ||
137 | */ | |
138 | ||
139 | #define PSP_ENV_SIZE 4096 | |
140 | ||
141 | static char psp_env_data[PSP_ENV_SIZE] = { 0, }; | |
142 | ||
143 | static char * __init lookup_psp_var_map(u8 num) | |
144 | { | |
145 | int i; | |
146 | ||
ea85a0e4 | 147 | for (i = 0; i < ARRAY_SIZE(psp_var_map); i++) |
7ca5dc14 FF |
148 | if (psp_var_map[i].num == num) |
149 | return psp_var_map[i].value; | |
150 | ||
151 | return NULL; | |
152 | } | |
153 | ||
154 | static void __init add_adam2_var(char *name, char *value) | |
155 | { | |
156 | int i; | |
157 | for (i = 0; i < MAX_ENTRY; i++) { | |
158 | if (!adam2_env[i].name) { | |
159 | adam2_env[i].name = name; | |
160 | adam2_env[i].value = value; | |
161 | return; | |
162 | } else if (!strcmp(adam2_env[i].name, name)) { | |
163 | adam2_env[i].value = value; | |
164 | return; | |
165 | } | |
166 | } | |
167 | } | |
168 | ||
169 | static int __init parse_psp_env(void *psp_env_base) | |
170 | { | |
171 | int i, n; | |
172 | char *name, *value; | |
173 | struct psp_env_chunk *chunks = (struct psp_env_chunk *)psp_env_data; | |
174 | ||
175 | memcpy_fromio(chunks, psp_env_base, PSP_ENV_SIZE); | |
176 | ||
177 | i = 1; | |
178 | n = PSP_ENV_SIZE / sizeof(struct psp_env_chunk); | |
179 | while (i < n) { | |
180 | if ((chunks[i].num == 0xff) || ((i + chunks[i].len) > n)) | |
181 | break; | |
182 | value = chunks[i].data; | |
183 | if (chunks[i].num) { | |
184 | name = lookup_psp_var_map(chunks[i].num); | |
185 | } else { | |
186 | name = value; | |
187 | value += strlen(name) + 1; | |
188 | } | |
189 | if (name) | |
190 | add_adam2_var(name, value); | |
191 | i += chunks[i].len; | |
192 | } | |
193 | return 0; | |
194 | } | |
195 | ||
196 | static void __init ar7_init_env(struct env_var *env) | |
197 | { | |
198 | int i; | |
199 | struct psbl_rec *psbl = (struct psbl_rec *)(KSEG1ADDR(0x14000300)); | |
200 | void *psp_env = (void *)KSEG1ADDR(psbl->env_base); | |
201 | ||
202 | if (strcmp(psp_env, psp_env_version) == 0) { | |
203 | parse_psp_env(psp_env); | |
204 | } else { | |
205 | for (i = 0; i < MAX_ENTRY; i++, env++) | |
206 | if (env->name) | |
207 | add_adam2_var(env->name, env->value); | |
208 | } | |
209 | } | |
210 | ||
211 | static void __init console_config(void) | |
212 | { | |
213 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
214 | char console_string[40]; | |
215 | int baud = 0; | |
216 | char parity = '\0', bits = '\0', flow = '\0'; | |
217 | char *s, *p; | |
218 | ||
219 | if (strstr(prom_getcmdline(), "console=")) | |
220 | return; | |
221 | ||
7ca5dc14 FF |
222 | s = prom_getenv("modetty0"); |
223 | if (s) { | |
224 | baud = simple_strtoul(s, &p, 10); | |
225 | s = p; | |
226 | if (*s == ',') | |
227 | s++; | |
228 | if (*s) | |
229 | parity = *s++; | |
230 | if (*s == ',') | |
231 | s++; | |
232 | if (*s) | |
233 | bits = *s++; | |
234 | if (*s == ',') | |
235 | s++; | |
236 | if (*s == 'h') | |
237 | flow = 'r'; | |
238 | } | |
239 | ||
240 | if (baud == 0) | |
241 | baud = 38400; | |
242 | if (parity != 'n' && parity != 'o' && parity != 'e') | |
243 | parity = 'n'; | |
244 | if (bits != '7' && bits != '8') | |
245 | bits = '8'; | |
246 | ||
247 | if (flow == 'r') | |
248 | sprintf(console_string, " console=ttyS0,%d%c%c%c", baud, | |
249 | parity, bits, flow); | |
250 | else | |
251 | sprintf(console_string, " console=ttyS0,%d%c%c", baud, parity, | |
252 | bits); | |
253 | strcat(prom_getcmdline(), console_string); | |
254 | #endif | |
255 | } | |
256 | ||
257 | void __init prom_init(void) | |
258 | { | |
259 | ar7_init_cmdline(fw_arg0, (char **)fw_arg1); | |
260 | ar7_init_env((struct env_var *)fw_arg2); | |
261 | console_config(); | |
262 | } | |
263 | ||
264 | #define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4))) | |
265 | static inline unsigned int serial_in(int offset) | |
266 | { | |
267 | return readl((void *)PORT(offset)); | |
268 | } | |
269 | ||
270 | static inline void serial_out(int offset, int value) | |
271 | { | |
272 | writel(value, (void *)PORT(offset)); | |
273 | } | |
274 | ||
7ca5dc14 FF |
275 | int prom_putchar(char c) |
276 | { | |
277 | while ((serial_in(UART_LSR) & UART_LSR_TEMT) == 0) | |
278 | ; | |
279 | serial_out(UART_TX, c); | |
280 | return 1; | |
281 | } | |
282 |