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b5220bc6 SG |
1 | /* |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
3 | * See file CREDITS for list of people who contributed to this | |
4 | * project. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License as | |
8 | * published by the Free Software Foundation; either version 2 of | |
9 | * the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
19 | * MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <common.h> | |
23 | #include <serial.h> | |
24 | #include <libfdt.h> | |
25 | #include <fdtdec.h> | |
26 | ||
e46431e1 | 27 | #include <asm/gpio.h> |
ed3ee5cd | 28 | |
b5220bc6 SG |
29 | DECLARE_GLOBAL_DATA_PTR; |
30 | ||
31 | /* | |
32 | * Here are the type we know about. One day we might allow drivers to | |
33 | * register. For now we just put them here. The COMPAT macro allows us to | |
34 | * turn this into a sparse list later, and keeps the ID with the name. | |
35 | */ | |
36 | #define COMPAT(id, name) name | |
37 | static const char * const compat_names[COMPAT_COUNT] = { | |
f88fe2de | 38 | COMPAT(UNKNOWN, "<none>"), |
87f938c9 | 39 | COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), |
e32624ef | 40 | COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"), |
96a78ac0 YL |
41 | COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), |
42 | COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), | |
0e35ad05 JZ |
43 | COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), |
44 | COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), | |
6642a681 | 45 | COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), |
312693c3 | 46 | COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), |
e1ae0d1f | 47 | COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), |
87540de3 | 48 | COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), |
f4e4e0b0 | 49 | COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), |
c9aa831e | 50 | COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), |
8f1b46b1 | 51 | COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), |
b19f5749 | 52 | COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), |
c3bb3c8b | 53 | COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), |
cc9fe33a HR |
54 | COMPAT(SMSC_LAN9215, "smsc,lan9215"), |
55 | COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), | |
c34253d1 | 56 | COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |
72dbff12 RS |
57 | COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), |
58 | COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), | |
5d50659d | 59 | COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), |
6abd1620 RS |
60 | COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), |
61 | COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), | |
618766c0 | 62 | COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), |
d7377b51 | 63 | COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), |
1e4706a7 | 64 | COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), |
45a4d4d3 | 65 | COMPAT(SAMSUNG_EXYNOS5_DWMMC, "samsung,exynos5250-dwmmc"), |
cd577e2b | 66 | COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), |
bb8215f4 | 67 | COMPAT(GENERIC_SPI_FLASH, "spi-flash"), |
7772bb78 | 68 | COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), |
f6267998 | 69 | COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), |
b5220bc6 SG |
70 | }; |
71 | ||
a53f4a29 SG |
72 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
73 | { | |
74 | /* We allow reading of the 'unknown' ID for testing purposes */ | |
75 | assert(id >= 0 && id < COMPAT_COUNT); | |
76 | return compat_names[id]; | |
77 | } | |
78 | ||
4397a2a8 SG |
79 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
80 | const char *prop_name, fdt_size_t *sizep) | |
b5220bc6 SG |
81 | { |
82 | const fdt_addr_t *cell; | |
83 | int len; | |
84 | ||
1cb2323b | 85 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 86 | cell = fdt_getprop(blob, node, prop_name, &len); |
4397a2a8 SG |
87 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
88 | len == sizeof(fdt_addr_t) * 2)) { | |
1cb2323b | 89 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
4397a2a8 SG |
90 | if (sizep) { |
91 | const fdt_size_t *size; | |
1cb2323b | 92 | |
4397a2a8 SG |
93 | size = (fdt_size_t *)((char *)cell + |
94 | sizeof(fdt_addr_t)); | |
95 | *sizep = fdt_size_to_cpu(*size); | |
96 | debug("addr=%p, size=%p\n", (void *)addr, | |
97 | (void *)*sizep); | |
98 | } else { | |
99 | debug("%p\n", (void *)addr); | |
100 | } | |
1cb2323b SG |
101 | return addr; |
102 | } | |
103 | debug("(not found)\n"); | |
b5220bc6 SG |
104 | return FDT_ADDR_T_NONE; |
105 | } | |
106 | ||
4397a2a8 SG |
107 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
108 | const char *prop_name) | |
109 | { | |
110 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); | |
111 | } | |
112 | ||
b5220bc6 SG |
113 | s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, |
114 | s32 default_val) | |
115 | { | |
116 | const s32 *cell; | |
117 | int len; | |
118 | ||
1cb2323b | 119 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 120 | cell = fdt_getprop(blob, node, prop_name, &len); |
1cb2323b SG |
121 | if (cell && len >= sizeof(s32)) { |
122 | s32 val = fdt32_to_cpu(cell[0]); | |
123 | ||
124 | debug("%#x (%d)\n", val, val); | |
125 | return val; | |
126 | } | |
127 | debug("(not found)\n"); | |
b5220bc6 SG |
128 | return default_val; |
129 | } | |
130 | ||
aadef0a1 CLC |
131 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
132 | uint64_t default_val) | |
133 | { | |
134 | const uint64_t *cell64; | |
135 | int length; | |
136 | ||
137 | cell64 = fdt_getprop(blob, node, prop_name, &length); | |
138 | if (!cell64 || length < sizeof(*cell64)) | |
139 | return default_val; | |
140 | ||
141 | return fdt64_to_cpu(*cell64); | |
142 | } | |
143 | ||
f88fe2de | 144 | int fdtdec_get_is_enabled(const void *blob, int node) |
b5220bc6 SG |
145 | { |
146 | const char *cell; | |
147 | ||
f88fe2de SG |
148 | /* |
149 | * It should say "okay", so only allow that. Some fdts use "ok" but | |
150 | * this is a bug. Please fix your device tree source file. See here | |
151 | * for discussion: | |
152 | * | |
153 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html | |
154 | */ | |
b5220bc6 SG |
155 | cell = fdt_getprop(blob, node, "status", NULL); |
156 | if (cell) | |
f88fe2de SG |
157 | return 0 == strcmp(cell, "okay"); |
158 | return 1; | |
b5220bc6 SG |
159 | } |
160 | ||
7cde397b | 161 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
b5220bc6 SG |
162 | { |
163 | enum fdt_compat_id id; | |
164 | ||
165 | /* Search our drivers */ | |
166 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) | |
167 | if (0 == fdt_node_check_compatible(blob, node, | |
168 | compat_names[id])) | |
169 | return id; | |
170 | return COMPAT_UNKNOWN; | |
171 | } | |
172 | ||
173 | int fdtdec_next_compatible(const void *blob, int node, | |
174 | enum fdt_compat_id id) | |
175 | { | |
176 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); | |
177 | } | |
178 | ||
3ddecfc7 SG |
179 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
180 | enum fdt_compat_id id, int *depthp) | |
181 | { | |
182 | do { | |
183 | node = fdt_next_node(blob, node, depthp); | |
184 | } while (*depthp > 1); | |
185 | ||
186 | /* If this is a direct subnode, and compatible, return it */ | |
187 | if (*depthp == 1 && 0 == fdt_node_check_compatible( | |
188 | blob, node, compat_names[id])) | |
189 | return node; | |
190 | ||
191 | return -FDT_ERR_NOTFOUND; | |
192 | } | |
193 | ||
b5220bc6 SG |
194 | int fdtdec_next_alias(const void *blob, const char *name, |
195 | enum fdt_compat_id id, int *upto) | |
196 | { | |
197 | #define MAX_STR_LEN 20 | |
198 | char str[MAX_STR_LEN + 20]; | |
199 | int node, err; | |
200 | ||
201 | /* snprintf() is not available */ | |
202 | assert(strlen(name) < MAX_STR_LEN); | |
203 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); | |
00878476 | 204 | node = fdt_path_offset(blob, str); |
b5220bc6 SG |
205 | if (node < 0) |
206 | return node; | |
207 | err = fdt_node_check_compatible(blob, node, compat_names[id]); | |
208 | if (err < 0) | |
209 | return err; | |
f88fe2de SG |
210 | if (err) |
211 | return -FDT_ERR_NOTFOUND; | |
212 | (*upto)++; | |
213 | return node; | |
b5220bc6 SG |
214 | } |
215 | ||
a53f4a29 SG |
216 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
217 | enum fdt_compat_id id, int *node_list, int maxcount) | |
c6782270 SG |
218 | { |
219 | memset(node_list, '\0', sizeof(*node_list) * maxcount); | |
220 | ||
221 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); | |
222 | } | |
223 | ||
224 | /* TODO: Can we tighten this code up a little? */ | |
225 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, | |
226 | enum fdt_compat_id id, int *node_list, int maxcount) | |
a53f4a29 SG |
227 | { |
228 | int name_len = strlen(name); | |
229 | int nodes[maxcount]; | |
230 | int num_found = 0; | |
231 | int offset, node; | |
232 | int alias_node; | |
233 | int count; | |
234 | int i, j; | |
235 | ||
236 | /* find the alias node if present */ | |
237 | alias_node = fdt_path_offset(blob, "/aliases"); | |
238 | ||
239 | /* | |
240 | * start with nothing, and we can assume that the root node can't | |
241 | * match | |
242 | */ | |
243 | memset(nodes, '\0', sizeof(nodes)); | |
244 | ||
245 | /* First find all the compatible nodes */ | |
246 | for (node = count = 0; node >= 0 && count < maxcount;) { | |
247 | node = fdtdec_next_compatible(blob, node, id); | |
248 | if (node >= 0) | |
249 | nodes[count++] = node; | |
250 | } | |
251 | if (node >= 0) | |
252 | debug("%s: warning: maxcount exceeded with alias '%s'\n", | |
253 | __func__, name); | |
254 | ||
255 | /* Now find all the aliases */ | |
a53f4a29 SG |
256 | for (offset = fdt_first_property_offset(blob, alias_node); |
257 | offset > 0; | |
258 | offset = fdt_next_property_offset(blob, offset)) { | |
259 | const struct fdt_property *prop; | |
260 | const char *path; | |
261 | int number; | |
262 | int found; | |
263 | ||
264 | node = 0; | |
265 | prop = fdt_get_property_by_offset(blob, offset, NULL); | |
266 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
267 | if (prop->len && 0 == strncmp(path, name, name_len)) | |
268 | node = fdt_path_offset(blob, prop->data); | |
269 | if (node <= 0) | |
270 | continue; | |
271 | ||
272 | /* Get the alias number */ | |
273 | number = simple_strtoul(path + name_len, NULL, 10); | |
274 | if (number < 0 || number >= maxcount) { | |
275 | debug("%s: warning: alias '%s' is out of range\n", | |
276 | __func__, path); | |
277 | continue; | |
278 | } | |
279 | ||
280 | /* Make sure the node we found is actually in our list! */ | |
281 | found = -1; | |
282 | for (j = 0; j < count; j++) | |
283 | if (nodes[j] == node) { | |
284 | found = j; | |
285 | break; | |
286 | } | |
287 | ||
288 | if (found == -1) { | |
289 | debug("%s: warning: alias '%s' points to a node " | |
290 | "'%s' that is missing or is not compatible " | |
291 | " with '%s'\n", __func__, path, | |
292 | fdt_get_name(blob, node, NULL), | |
293 | compat_names[id]); | |
294 | continue; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Add this node to our list in the right place, and mark | |
299 | * it as done. | |
300 | */ | |
301 | if (fdtdec_get_is_enabled(blob, node)) { | |
c6782270 SG |
302 | if (node_list[number]) { |
303 | debug("%s: warning: alias '%s' requires that " | |
304 | "a node be placed in the list in a " | |
305 | "position which is already filled by " | |
306 | "node '%s'\n", __func__, path, | |
307 | fdt_get_name(blob, node, NULL)); | |
308 | continue; | |
309 | } | |
a53f4a29 SG |
310 | node_list[number] = node; |
311 | if (number >= num_found) | |
312 | num_found = number + 1; | |
313 | } | |
c6782270 | 314 | nodes[found] = 0; |
a53f4a29 SG |
315 | } |
316 | ||
317 | /* Add any nodes not mentioned by an alias */ | |
318 | for (i = j = 0; i < maxcount; i++) { | |
319 | if (!node_list[i]) { | |
320 | for (; j < maxcount; j++) | |
321 | if (nodes[j] && | |
322 | fdtdec_get_is_enabled(blob, nodes[j])) | |
323 | break; | |
324 | ||
325 | /* Have we run out of nodes to add? */ | |
326 | if (j == maxcount) | |
327 | break; | |
328 | ||
329 | assert(!node_list[i]); | |
330 | node_list[i] = nodes[j++]; | |
331 | if (i >= num_found) | |
332 | num_found = i + 1; | |
333 | } | |
334 | } | |
335 | ||
336 | return num_found; | |
337 | } | |
338 | ||
9a263e55 SG |
339 | int fdtdec_check_fdt(void) |
340 | { | |
341 | /* | |
342 | * We must have an FDT, but we cannot panic() yet since the console | |
343 | * is not ready. So for now, just assert(). Boards which need an early | |
344 | * FDT (prior to console ready) will need to make their own | |
345 | * arrangements and do their own checks. | |
346 | */ | |
347 | assert(!fdtdec_prepare_fdt()); | |
348 | return 0; | |
349 | } | |
350 | ||
b5220bc6 SG |
351 | /* |
352 | * This function is a little odd in that it accesses global data. At some | |
353 | * point if the architecture board.c files merge this will make more sense. | |
354 | * Even now, it is common code. | |
355 | */ | |
9a263e55 | 356 | int fdtdec_prepare_fdt(void) |
b5220bc6 | 357 | { |
c309c2da SG |
358 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
359 | fdt_check_header(gd->fdt_blob)) { | |
9a263e55 SG |
360 | printf("No valid FDT found - please append one to U-Boot " |
361 | "binary, use u-boot-dtb.bin or define " | |
a733b06b | 362 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
9a263e55 SG |
363 | return -1; |
364 | } | |
b5220bc6 SG |
365 | return 0; |
366 | } | |
d17da655 SG |
367 | |
368 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) | |
369 | { | |
370 | const u32 *phandle; | |
371 | int lookup; | |
372 | ||
1cb2323b | 373 | debug("%s: %s\n", __func__, prop_name); |
d17da655 SG |
374 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
375 | if (!phandle) | |
376 | return -FDT_ERR_NOTFOUND; | |
377 | ||
378 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); | |
379 | return lookup; | |
380 | } | |
381 | ||
382 | /** | |
383 | * Look up a property in a node and check that it has a minimum length. | |
384 | * | |
385 | * @param blob FDT blob | |
386 | * @param node node to examine | |
387 | * @param prop_name name of property to find | |
388 | * @param min_len minimum property length in bytes | |
389 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not | |
390 | found, or -FDT_ERR_BADLAYOUT if not enough data | |
391 | * @return pointer to cell, which is only valid if err == 0 | |
392 | */ | |
393 | static const void *get_prop_check_min_len(const void *blob, int node, | |
394 | const char *prop_name, int min_len, int *err) | |
395 | { | |
396 | const void *cell; | |
397 | int len; | |
398 | ||
399 | debug("%s: %s\n", __func__, prop_name); | |
400 | cell = fdt_getprop(blob, node, prop_name, &len); | |
401 | if (!cell) | |
402 | *err = -FDT_ERR_NOTFOUND; | |
403 | else if (len < min_len) | |
404 | *err = -FDT_ERR_BADLAYOUT; | |
405 | else | |
406 | *err = 0; | |
407 | return cell; | |
408 | } | |
409 | ||
410 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, | |
411 | u32 *array, int count) | |
412 | { | |
413 | const u32 *cell; | |
414 | int i, err = 0; | |
415 | ||
416 | debug("%s: %s\n", __func__, prop_name); | |
417 | cell = get_prop_check_min_len(blob, node, prop_name, | |
418 | sizeof(u32) * count, &err); | |
419 | if (!err) { | |
420 | for (i = 0; i < count; i++) | |
421 | array[i] = fdt32_to_cpu(cell[i]); | |
422 | } | |
423 | return err; | |
424 | } | |
425 | ||
96875e7d SG |
426 | const u32 *fdtdec_locate_array(const void *blob, int node, |
427 | const char *prop_name, int count) | |
428 | { | |
429 | const u32 *cell; | |
430 | int err; | |
431 | ||
432 | cell = get_prop_check_min_len(blob, node, prop_name, | |
433 | sizeof(u32) * count, &err); | |
434 | return err ? NULL : cell; | |
435 | } | |
436 | ||
d17da655 SG |
437 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
438 | { | |
439 | const s32 *cell; | |
440 | int len; | |
441 | ||
442 | debug("%s: %s\n", __func__, prop_name); | |
443 | cell = fdt_getprop(blob, node, prop_name, &len); | |
444 | return cell != NULL; | |
445 | } | |
ed3ee5cd SG |
446 | |
447 | /** | |
448 | * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no | |
449 | * terminating item. | |
450 | * | |
451 | * @param blob FDT blob to use | |
452 | * @param node Node to look at | |
453 | * @param prop_name Node property name | |
454 | * @param gpio Array of gpio elements to fill from FDT. This will be | |
455 | * untouched if either 0 or an error is returned | |
456 | * @param max_count Maximum number of elements allowed | |
457 | * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would | |
458 | * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. | |
459 | */ | |
5921f6a2 AK |
460 | int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, |
461 | struct fdt_gpio_state *gpio, int max_count) | |
ed3ee5cd SG |
462 | { |
463 | const struct fdt_property *prop; | |
464 | const u32 *cell; | |
465 | const char *name; | |
466 | int len, i; | |
467 | ||
468 | debug("%s: %s\n", __func__, prop_name); | |
469 | assert(max_count > 0); | |
470 | prop = fdt_get_property(blob, node, prop_name, &len); | |
471 | if (!prop) { | |
1cb2323b | 472 | debug("%s: property '%s' missing\n", __func__, prop_name); |
ed3ee5cd SG |
473 | return -FDT_ERR_NOTFOUND; |
474 | } | |
475 | ||
476 | /* We will use the name to tag the GPIO */ | |
477 | name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
478 | cell = (u32 *)prop->data; | |
479 | len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ | |
480 | if (len > max_count) { | |
1cb2323b | 481 | debug(" %s: too many GPIOs / cells for " |
ed3ee5cd SG |
482 | "property '%s'\n", __func__, prop_name); |
483 | return -FDT_ERR_BADLAYOUT; | |
484 | } | |
485 | ||
486 | /* Read out the GPIO data from the cells */ | |
487 | for (i = 0; i < len; i++, cell += 3) { | |
488 | gpio[i].gpio = fdt32_to_cpu(cell[1]); | |
489 | gpio[i].flags = fdt32_to_cpu(cell[2]); | |
490 | gpio[i].name = name; | |
491 | } | |
492 | ||
493 | return len; | |
494 | } | |
495 | ||
496 | int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, | |
497 | struct fdt_gpio_state *gpio) | |
498 | { | |
499 | int err; | |
500 | ||
501 | debug("%s: %s\n", __func__, prop_name); | |
502 | gpio->gpio = FDT_GPIO_NONE; | |
503 | gpio->name = NULL; | |
504 | err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); | |
505 | return err == 1 ? 0 : err; | |
506 | } | |
507 | ||
202ff753 SP |
508 | int fdtdec_get_gpio(struct fdt_gpio_state *gpio) |
509 | { | |
510 | int val; | |
511 | ||
512 | if (!fdt_gpio_isvalid(gpio)) | |
513 | return -1; | |
514 | ||
515 | val = gpio_get_value(gpio->gpio); | |
516 | return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
517 | } | |
518 | ||
519 | int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) | |
520 | { | |
521 | if (!fdt_gpio_isvalid(gpio)) | |
522 | return -1; | |
523 | ||
524 | val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
525 | return gpio_set_value(gpio->gpio, val); | |
526 | } | |
527 | ||
ed3ee5cd SG |
528 | int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) |
529 | { | |
530 | /* | |
531 | * Return success if there is no GPIO defined. This is used for | |
532 | * optional GPIOs) | |
533 | */ | |
534 | if (!fdt_gpio_isvalid(gpio)) | |
535 | return 0; | |
536 | ||
537 | if (gpio_request(gpio->gpio, gpio->name)) | |
538 | return -1; | |
539 | return 0; | |
540 | } | |
bed4d892 AS |
541 | |
542 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, | |
543 | u8 *array, int count) | |
544 | { | |
545 | const u8 *cell; | |
546 | int err; | |
547 | ||
548 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
549 | if (!err) | |
550 | memcpy(array, cell, count); | |
551 | return err; | |
552 | } | |
553 | ||
554 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, | |
555 | const char *prop_name, int count) | |
556 | { | |
557 | const u8 *cell; | |
558 | int err; | |
559 | ||
560 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
561 | if (err) | |
562 | return NULL; | |
563 | return cell; | |
564 | } | |
09258f1e | 565 | |
09258f1e AK |
566 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
567 | int default_val) | |
568 | { | |
569 | int config_node; | |
570 | ||
571 | debug("%s: %s\n", __func__, prop_name); | |
572 | config_node = fdt_path_offset(blob, "/config"); | |
573 | if (config_node < 0) | |
574 | return default_val; | |
575 | return fdtdec_get_int(blob, config_node, prop_name, default_val); | |
576 | } | |
332ab0d5 | 577 | |
79289c0b GB |
578 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
579 | { | |
580 | int config_node; | |
581 | const void *prop; | |
582 | ||
583 | debug("%s: %s\n", __func__, prop_name); | |
584 | config_node = fdt_path_offset(blob, "/config"); | |
585 | if (config_node < 0) | |
586 | return 0; | |
587 | prop = fdt_get_property(blob, config_node, prop_name, NULL); | |
588 | ||
589 | return prop != NULL; | |
590 | } | |
591 | ||
332ab0d5 SG |
592 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
593 | { | |
594 | const char *nodep; | |
595 | int nodeoffset; | |
596 | int len; | |
597 | ||
598 | debug("%s: %s\n", __func__, prop_name); | |
599 | nodeoffset = fdt_path_offset(blob, "/config"); | |
600 | if (nodeoffset < 0) | |
601 | return NULL; | |
602 | ||
603 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); | |
604 | if (!nodep) | |
605 | return NULL; | |
606 | ||
607 | return (char *)nodep; | |
608 | } | |
f20c4619 SG |
609 | |
610 | int fdtdec_decode_region(const void *blob, int node, | |
611 | const char *prop_name, void **ptrp, size_t *size) | |
612 | { | |
613 | const fdt_addr_t *cell; | |
614 | int len; | |
615 | ||
616 | debug("%s: %s\n", __func__, prop_name); | |
617 | cell = fdt_getprop(blob, node, prop_name, &len); | |
618 | if (!cell || (len != sizeof(fdt_addr_t) * 2)) | |
619 | return -1; | |
620 | ||
621 | *ptrp = (void *)fdt_addr_to_cpu(*cell); | |
622 | *size = fdt_size_to_cpu(cell[1]); | |
623 | debug("%s: size=%zx\n", __func__, *size); | |
624 | return 0; | |
625 | } |