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500856eb | 1 | /* |
923aa481 | 2 | * (C) Copyright 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com> |
500856eb | 3 | * |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
500856eb RJ |
5 | */ |
6 | ||
7 | #include <common.h> | |
8 | #include <linux/types.h> | |
9 | #include <api_public.h> | |
10 | ||
11 | #include "glue.h" | |
12 | ||
13 | static int valid_sig(struct api_signature *sig) | |
14 | { | |
15 | uint32_t checksum; | |
16 | struct api_signature s; | |
17 | ||
18 | if (sig == NULL) | |
19 | return 0; | |
20 | /* | |
21 | * Clear the checksum field (in the local copy) so as to calculate the | |
22 | * CRC with the same initial contents as at the time when the sig was | |
23 | * produced | |
24 | */ | |
25 | s = *sig; | |
26 | s.checksum = 0; | |
27 | ||
28 | checksum = crc32(0, (unsigned char *)&s, sizeof(struct api_signature)); | |
29 | ||
30 | if (checksum != sig->checksum) | |
31 | return 0; | |
32 | ||
33 | return 1; | |
34 | } | |
35 | ||
36 | /* | |
37 | * Searches for the U-Boot API signature | |
38 | * | |
39 | * returns 1/0 depending on found/not found result | |
40 | */ | |
923aa481 RJ |
41 | int api_search_sig(struct api_signature **sig) |
42 | { | |
500856eb | 43 | unsigned char *sp; |
b84d7d8f RJ |
44 | uint32_t search_start = 0; |
45 | uint32_t search_end = 0; | |
500856eb RJ |
46 | |
47 | if (sig == NULL) | |
48 | return 0; | |
49 | ||
b84d7d8f RJ |
50 | if (search_hint == 0) |
51 | search_hint = 255 * 1024 * 1024; | |
500856eb | 52 | |
b84d7d8f RJ |
53 | search_start = search_hint & ~0x000fffff; |
54 | search_end = search_start + API_SEARCH_LEN - API_SIG_MAGLEN; | |
55 | ||
56 | sp = (unsigned char *)search_start; | |
57 | while ((sp + API_SIG_MAGLEN) < (unsigned char *)search_end) { | |
500856eb RJ |
58 | if (!memcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) { |
59 | *sig = (struct api_signature *)sp; | |
60 | if (valid_sig(*sig)) | |
61 | return 1; | |
62 | } | |
63 | sp += API_SIG_MAGLEN; | |
64 | } | |
65 | ||
66 | *sig = NULL; | |
67 | return 0; | |
68 | } | |
69 | ||
70 | /**************************************** | |
71 | * | |
72 | * console | |
73 | * | |
74 | ****************************************/ | |
75 | ||
76 | int ub_getc(void) | |
77 | { | |
78 | int c; | |
79 | ||
78757d52 | 80 | if (!syscall(API_GETC, NULL, &c)) |
500856eb RJ |
81 | return -1; |
82 | ||
83 | return c; | |
84 | } | |
85 | ||
86 | int ub_tstc(void) | |
87 | { | |
88 | int t; | |
89 | ||
78757d52 | 90 | if (!syscall(API_TSTC, NULL, &t)) |
500856eb RJ |
91 | return -1; |
92 | ||
93 | return t; | |
94 | } | |
95 | ||
96 | void ub_putc(char c) | |
97 | { | |
78757d52 | 98 | syscall(API_PUTC, NULL, &c); |
500856eb RJ |
99 | } |
100 | ||
101 | void ub_puts(const char *s) | |
102 | { | |
78757d52 | 103 | syscall(API_PUTS, NULL, s); |
500856eb RJ |
104 | } |
105 | ||
106 | /**************************************** | |
107 | * | |
108 | * system | |
109 | * | |
110 | ****************************************/ | |
111 | ||
112 | void ub_reset(void) | |
113 | { | |
114 | syscall(API_RESET, NULL); | |
115 | } | |
116 | ||
923aa481 | 117 | static struct mem_region mr[UB_MAX_MR]; |
500856eb RJ |
118 | static struct sys_info si; |
119 | ||
120 | struct sys_info * ub_get_sys_info(void) | |
121 | { | |
122 | int err = 0; | |
123 | ||
124 | memset(&si, 0, sizeof(struct sys_info)); | |
125 | si.mr = mr; | |
923aa481 | 126 | si.mr_no = UB_MAX_MR; |
500856eb RJ |
127 | memset(&mr, 0, sizeof(mr)); |
128 | ||
78757d52 | 129 | if (!syscall(API_GET_SYS_INFO, &err, &si)) |
500856eb RJ |
130 | return NULL; |
131 | ||
132 | return ((err) ? NULL : &si); | |
133 | } | |
134 | ||
135 | /**************************************** | |
136 | * | |
137 | * timing | |
138 | * | |
139 | ****************************************/ | |
d3a6532c | 140 | |
500856eb RJ |
141 | void ub_udelay(unsigned long usec) |
142 | { | |
143 | syscall(API_UDELAY, NULL, &usec); | |
144 | } | |
145 | ||
146 | unsigned long ub_get_timer(unsigned long base) | |
147 | { | |
148 | unsigned long cur; | |
149 | ||
150 | if (!syscall(API_GET_TIMER, NULL, &cur, &base)) | |
151 | return 0; | |
152 | ||
153 | return cur; | |
154 | } | |
155 | ||
156 | ||
157 | /**************************************************************************** | |
158 | * | |
159 | * devices | |
160 | * | |
923aa481 | 161 | * Devices are identified by handles: numbers 0, 1, 2, ..., UB_MAX_DEV-1 |
500856eb RJ |
162 | * |
163 | ***************************************************************************/ | |
164 | ||
923aa481 | 165 | static struct device_info devices[UB_MAX_DEV]; |
500856eb RJ |
166 | |
167 | struct device_info * ub_dev_get(int i) | |
168 | { | |
923aa481 | 169 | return ((i < 0 || i >= UB_MAX_DEV) ? NULL : &devices[i]); |
500856eb RJ |
170 | } |
171 | ||
172 | /* | |
173 | * Enumerates the devices: fills out device_info elements in the devices[] | |
174 | * array. | |
175 | * | |
176 | * returns: number of devices found | |
177 | */ | |
178 | int ub_dev_enum(void) | |
179 | { | |
180 | struct device_info *di; | |
181 | int n = 0; | |
182 | ||
923aa481 | 183 | memset(&devices, 0, sizeof(struct device_info) * UB_MAX_DEV); |
500856eb RJ |
184 | di = &devices[0]; |
185 | ||
186 | if (!syscall(API_DEV_ENUM, NULL, di)) | |
187 | return 0; | |
188 | ||
189 | while (di->cookie != NULL) { | |
190 | ||
923aa481 | 191 | if (++n >= UB_MAX_DEV) |
500856eb RJ |
192 | break; |
193 | ||
194 | /* take another device_info */ | |
195 | di++; | |
196 | ||
197 | /* pass on the previous cookie */ | |
198 | di->cookie = devices[n - 1].cookie; | |
199 | ||
200 | if (!syscall(API_DEV_ENUM, NULL, di)) | |
201 | return 0; | |
202 | } | |
203 | ||
204 | return n; | |
205 | } | |
206 | ||
207 | /* | |
208 | * handle: 0-based id of the device | |
209 | * | |
210 | * returns: 0 when OK, err otherwise | |
211 | */ | |
212 | int ub_dev_open(int handle) | |
213 | { | |
214 | struct device_info *di; | |
215 | int err = 0; | |
216 | ||
923aa481 | 217 | if (handle < 0 || handle >= UB_MAX_DEV) |
500856eb RJ |
218 | return API_EINVAL; |
219 | ||
220 | di = &devices[handle]; | |
221 | ||
222 | if (!syscall(API_DEV_OPEN, &err, di)) | |
223 | return -1; | |
224 | ||
225 | return err; | |
226 | } | |
227 | ||
228 | int ub_dev_close(int handle) | |
229 | { | |
230 | struct device_info *di; | |
231 | ||
923aa481 | 232 | if (handle < 0 || handle >= UB_MAX_DEV) |
500856eb RJ |
233 | return API_EINVAL; |
234 | ||
235 | di = &devices[handle]; | |
236 | if (!syscall(API_DEV_CLOSE, NULL, di)) | |
237 | return -1; | |
238 | ||
239 | return 0; | |
240 | } | |
241 | ||
242 | /* | |
243 | * | |
244 | * Validates device for read/write, it has to: | |
245 | * | |
246 | * - have sane handle | |
247 | * - be opened | |
248 | * | |
249 | * returns: 0/1 accordingly | |
250 | */ | |
251 | static int dev_valid(int handle) | |
252 | { | |
923aa481 | 253 | if (handle < 0 || handle >= UB_MAX_DEV) |
500856eb RJ |
254 | return 0; |
255 | ||
256 | if (devices[handle].state != DEV_STA_OPEN) | |
257 | return 0; | |
258 | ||
259 | return 1; | |
260 | } | |
261 | ||
262 | static int dev_stor_valid(int handle) | |
263 | { | |
264 | if (!dev_valid(handle)) | |
265 | return 0; | |
266 | ||
267 | if (!(devices[handle].type & DEV_TYP_STOR)) | |
268 | return 0; | |
269 | ||
270 | return 1; | |
271 | } | |
272 | ||
923aa481 RJ |
273 | int ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start, |
274 | lbasize_t *rlen) | |
500856eb RJ |
275 | { |
276 | struct device_info *di; | |
277 | lbasize_t act_len; | |
278 | int err = 0; | |
279 | ||
280 | if (!dev_stor_valid(handle)) | |
281 | return API_ENODEV; | |
282 | ||
283 | di = &devices[handle]; | |
284 | if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len)) | |
923aa481 | 285 | return API_ESYSC; |
500856eb | 286 | |
923aa481 RJ |
287 | if (!err && rlen) |
288 | *rlen = act_len; | |
500856eb | 289 | |
923aa481 | 290 | return err; |
500856eb RJ |
291 | } |
292 | ||
293 | static int dev_net_valid(int handle) | |
294 | { | |
295 | if (!dev_valid(handle)) | |
296 | return 0; | |
297 | ||
298 | if (devices[handle].type != DEV_TYP_NET) | |
299 | return 0; | |
300 | ||
301 | return 1; | |
302 | } | |
303 | ||
923aa481 | 304 | int ub_dev_recv(int handle, void *buf, int len, int *rlen) |
500856eb RJ |
305 | { |
306 | struct device_info *di; | |
307 | int err = 0, act_len; | |
308 | ||
309 | if (!dev_net_valid(handle)) | |
310 | return API_ENODEV; | |
311 | ||
312 | di = &devices[handle]; | |
313 | if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len)) | |
923aa481 | 314 | return API_ESYSC; |
500856eb | 315 | |
923aa481 RJ |
316 | if (!err && rlen) |
317 | *rlen = act_len; | |
500856eb | 318 | |
923aa481 | 319 | return (err); |
500856eb RJ |
320 | } |
321 | ||
322 | int ub_dev_send(int handle, void *buf, int len) | |
323 | { | |
324 | struct device_info *di; | |
325 | int err = 0; | |
326 | ||
327 | if (!dev_net_valid(handle)) | |
328 | return API_ENODEV; | |
329 | ||
330 | di = &devices[handle]; | |
331 | if (!syscall(API_DEV_WRITE, &err, di, buf, &len)) | |
923aa481 | 332 | return API_ESYSC; |
500856eb RJ |
333 | |
334 | return err; | |
335 | } | |
336 | ||
337 | /**************************************** | |
338 | * | |
339 | * env vars | |
340 | * | |
341 | ****************************************/ | |
342 | ||
343 | char * ub_env_get(const char *name) | |
344 | { | |
345 | char *value; | |
346 | ||
78757d52 | 347 | if (!syscall(API_ENV_GET, NULL, name, &value)) |
500856eb RJ |
348 | return NULL; |
349 | ||
350 | return value; | |
351 | } | |
352 | ||
353 | void ub_env_set(const char *name, char *value) | |
354 | { | |
78757d52 | 355 | syscall(API_ENV_SET, NULL, name, value); |
500856eb RJ |
356 | } |
357 | ||
500856eb RJ |
358 | static char env_name[256]; |
359 | ||
360 | const char * ub_env_enum(const char *last) | |
361 | { | |
362 | const char *env, *str; | |
363 | int i; | |
364 | ||
365 | env = NULL; | |
366 | ||
367 | /* | |
368 | * It's OK to pass only the name piece as last (and not the whole | |
369 | * 'name=val' string), since the API_ENUM_ENV call uses envmatch() | |
370 | * internally, which handles such case | |
371 | */ | |
78757d52 | 372 | if (!syscall(API_ENV_ENUM, NULL, last, &env)) |
500856eb RJ |
373 | return NULL; |
374 | ||
375 | if (!env) | |
376 | /* no more env. variables to enumerate */ | |
377 | return NULL; | |
378 | ||
379 | /* next enumerated env var */ | |
380 | memset(env_name, 0, 256); | |
381 | for (i = 0, str = env; *str != '=' && *str != '\0';) | |
382 | env_name[i++] = *str++; | |
383 | ||
384 | env_name[i] = '\0'; | |
385 | ||
386 | return env_name; | |
387 | } | |
a2a5729f CLC |
388 | |
389 | /**************************************** | |
390 | * | |
391 | * display | |
392 | * | |
393 | ****************************************/ | |
394 | ||
395 | int ub_display_get_info(int type, struct display_info *di) | |
396 | { | |
397 | int err = 0; | |
398 | ||
78757d52 | 399 | if (!syscall(API_DISPLAY_GET_INFO, &err, type, di)) |
a2a5729f CLC |
400 | return API_ESYSC; |
401 | ||
402 | return err; | |
403 | } | |
404 | ||
405 | int ub_display_draw_bitmap(ulong bitmap, int x, int y) | |
406 | { | |
407 | int err = 0; | |
408 | ||
409 | if (!syscall(API_DISPLAY_DRAW_BITMAP, &err, bitmap, x, y)) | |
410 | return API_ESYSC; | |
411 | ||
412 | return err; | |
413 | } | |
414 | ||
415 | void ub_display_clear(void) | |
416 | { | |
417 | syscall(API_DISPLAY_CLEAR, NULL); | |
418 | } | |
7e3e2056 RC |
419 | |
420 | __weak void *memcpy(void *dest, const void *src, size_t size) | |
421 | { | |
422 | unsigned char *dptr = dest; | |
423 | const unsigned char *ptr = src; | |
424 | const unsigned char *end = src + size; | |
425 | ||
426 | while (ptr < end) | |
427 | *dptr++ = *ptr++; | |
428 | ||
429 | return dest; | |
430 | } |