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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"), |
ec34fa5e | 70 | COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), |
b5220bc6 SG |
71 | }; |
72 | ||
a53f4a29 SG |
73 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
74 | { | |
75 | /* We allow reading of the 'unknown' ID for testing purposes */ | |
76 | assert(id >= 0 && id < COMPAT_COUNT); | |
77 | return compat_names[id]; | |
78 | } | |
79 | ||
4397a2a8 SG |
80 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
81 | const char *prop_name, fdt_size_t *sizep) | |
b5220bc6 SG |
82 | { |
83 | const fdt_addr_t *cell; | |
84 | int len; | |
85 | ||
1cb2323b | 86 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 87 | cell = fdt_getprop(blob, node, prop_name, &len); |
4397a2a8 SG |
88 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
89 | len == sizeof(fdt_addr_t) * 2)) { | |
1cb2323b | 90 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
4397a2a8 SG |
91 | if (sizep) { |
92 | const fdt_size_t *size; | |
1cb2323b | 93 | |
4397a2a8 SG |
94 | size = (fdt_size_t *)((char *)cell + |
95 | sizeof(fdt_addr_t)); | |
96 | *sizep = fdt_size_to_cpu(*size); | |
97 | debug("addr=%p, size=%p\n", (void *)addr, | |
98 | (void *)*sizep); | |
99 | } else { | |
100 | debug("%p\n", (void *)addr); | |
101 | } | |
1cb2323b SG |
102 | return addr; |
103 | } | |
104 | debug("(not found)\n"); | |
b5220bc6 SG |
105 | return FDT_ADDR_T_NONE; |
106 | } | |
107 | ||
4397a2a8 SG |
108 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
109 | const char *prop_name) | |
110 | { | |
111 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); | |
112 | } | |
113 | ||
b5220bc6 SG |
114 | s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, |
115 | s32 default_val) | |
116 | { | |
117 | const s32 *cell; | |
118 | int len; | |
119 | ||
1cb2323b | 120 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 121 | cell = fdt_getprop(blob, node, prop_name, &len); |
1cb2323b SG |
122 | if (cell && len >= sizeof(s32)) { |
123 | s32 val = fdt32_to_cpu(cell[0]); | |
124 | ||
125 | debug("%#x (%d)\n", val, val); | |
126 | return val; | |
127 | } | |
128 | debug("(not found)\n"); | |
b5220bc6 SG |
129 | return default_val; |
130 | } | |
131 | ||
aadef0a1 CLC |
132 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
133 | uint64_t default_val) | |
134 | { | |
135 | const uint64_t *cell64; | |
136 | int length; | |
137 | ||
138 | cell64 = fdt_getprop(blob, node, prop_name, &length); | |
139 | if (!cell64 || length < sizeof(*cell64)) | |
140 | return default_val; | |
141 | ||
142 | return fdt64_to_cpu(*cell64); | |
143 | } | |
144 | ||
f88fe2de | 145 | int fdtdec_get_is_enabled(const void *blob, int node) |
b5220bc6 SG |
146 | { |
147 | const char *cell; | |
148 | ||
f88fe2de SG |
149 | /* |
150 | * It should say "okay", so only allow that. Some fdts use "ok" but | |
151 | * this is a bug. Please fix your device tree source file. See here | |
152 | * for discussion: | |
153 | * | |
154 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html | |
155 | */ | |
b5220bc6 SG |
156 | cell = fdt_getprop(blob, node, "status", NULL); |
157 | if (cell) | |
f88fe2de SG |
158 | return 0 == strcmp(cell, "okay"); |
159 | return 1; | |
b5220bc6 SG |
160 | } |
161 | ||
7cde397b | 162 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
b5220bc6 SG |
163 | { |
164 | enum fdt_compat_id id; | |
165 | ||
166 | /* Search our drivers */ | |
167 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) | |
168 | if (0 == fdt_node_check_compatible(blob, node, | |
169 | compat_names[id])) | |
170 | return id; | |
171 | return COMPAT_UNKNOWN; | |
172 | } | |
173 | ||
174 | int fdtdec_next_compatible(const void *blob, int node, | |
175 | enum fdt_compat_id id) | |
176 | { | |
177 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); | |
178 | } | |
179 | ||
3ddecfc7 SG |
180 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
181 | enum fdt_compat_id id, int *depthp) | |
182 | { | |
183 | do { | |
184 | node = fdt_next_node(blob, node, depthp); | |
185 | } while (*depthp > 1); | |
186 | ||
187 | /* If this is a direct subnode, and compatible, return it */ | |
188 | if (*depthp == 1 && 0 == fdt_node_check_compatible( | |
189 | blob, node, compat_names[id])) | |
190 | return node; | |
191 | ||
192 | return -FDT_ERR_NOTFOUND; | |
193 | } | |
194 | ||
b5220bc6 SG |
195 | int fdtdec_next_alias(const void *blob, const char *name, |
196 | enum fdt_compat_id id, int *upto) | |
197 | { | |
198 | #define MAX_STR_LEN 20 | |
199 | char str[MAX_STR_LEN + 20]; | |
200 | int node, err; | |
201 | ||
202 | /* snprintf() is not available */ | |
203 | assert(strlen(name) < MAX_STR_LEN); | |
204 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); | |
00878476 | 205 | node = fdt_path_offset(blob, str); |
b5220bc6 SG |
206 | if (node < 0) |
207 | return node; | |
208 | err = fdt_node_check_compatible(blob, node, compat_names[id]); | |
209 | if (err < 0) | |
210 | return err; | |
f88fe2de SG |
211 | if (err) |
212 | return -FDT_ERR_NOTFOUND; | |
213 | (*upto)++; | |
214 | return node; | |
b5220bc6 SG |
215 | } |
216 | ||
a53f4a29 SG |
217 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
218 | enum fdt_compat_id id, int *node_list, int maxcount) | |
c6782270 SG |
219 | { |
220 | memset(node_list, '\0', sizeof(*node_list) * maxcount); | |
221 | ||
222 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); | |
223 | } | |
224 | ||
225 | /* TODO: Can we tighten this code up a little? */ | |
226 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, | |
227 | enum fdt_compat_id id, int *node_list, int maxcount) | |
a53f4a29 SG |
228 | { |
229 | int name_len = strlen(name); | |
230 | int nodes[maxcount]; | |
231 | int num_found = 0; | |
232 | int offset, node; | |
233 | int alias_node; | |
234 | int count; | |
235 | int i, j; | |
236 | ||
237 | /* find the alias node if present */ | |
238 | alias_node = fdt_path_offset(blob, "/aliases"); | |
239 | ||
240 | /* | |
241 | * start with nothing, and we can assume that the root node can't | |
242 | * match | |
243 | */ | |
244 | memset(nodes, '\0', sizeof(nodes)); | |
245 | ||
246 | /* First find all the compatible nodes */ | |
247 | for (node = count = 0; node >= 0 && count < maxcount;) { | |
248 | node = fdtdec_next_compatible(blob, node, id); | |
249 | if (node >= 0) | |
250 | nodes[count++] = node; | |
251 | } | |
252 | if (node >= 0) | |
253 | debug("%s: warning: maxcount exceeded with alias '%s'\n", | |
254 | __func__, name); | |
255 | ||
256 | /* Now find all the aliases */ | |
a53f4a29 SG |
257 | for (offset = fdt_first_property_offset(blob, alias_node); |
258 | offset > 0; | |
259 | offset = fdt_next_property_offset(blob, offset)) { | |
260 | const struct fdt_property *prop; | |
261 | const char *path; | |
262 | int number; | |
263 | int found; | |
264 | ||
265 | node = 0; | |
266 | prop = fdt_get_property_by_offset(blob, offset, NULL); | |
267 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
268 | if (prop->len && 0 == strncmp(path, name, name_len)) | |
269 | node = fdt_path_offset(blob, prop->data); | |
270 | if (node <= 0) | |
271 | continue; | |
272 | ||
273 | /* Get the alias number */ | |
274 | number = simple_strtoul(path + name_len, NULL, 10); | |
275 | if (number < 0 || number >= maxcount) { | |
276 | debug("%s: warning: alias '%s' is out of range\n", | |
277 | __func__, path); | |
278 | continue; | |
279 | } | |
280 | ||
281 | /* Make sure the node we found is actually in our list! */ | |
282 | found = -1; | |
283 | for (j = 0; j < count; j++) | |
284 | if (nodes[j] == node) { | |
285 | found = j; | |
286 | break; | |
287 | } | |
288 | ||
289 | if (found == -1) { | |
290 | debug("%s: warning: alias '%s' points to a node " | |
291 | "'%s' that is missing or is not compatible " | |
292 | " with '%s'\n", __func__, path, | |
293 | fdt_get_name(blob, node, NULL), | |
294 | compat_names[id]); | |
295 | continue; | |
296 | } | |
297 | ||
298 | /* | |
299 | * Add this node to our list in the right place, and mark | |
300 | * it as done. | |
301 | */ | |
302 | if (fdtdec_get_is_enabled(blob, node)) { | |
c6782270 SG |
303 | if (node_list[number]) { |
304 | debug("%s: warning: alias '%s' requires that " | |
305 | "a node be placed in the list in a " | |
306 | "position which is already filled by " | |
307 | "node '%s'\n", __func__, path, | |
308 | fdt_get_name(blob, node, NULL)); | |
309 | continue; | |
310 | } | |
a53f4a29 SG |
311 | node_list[number] = node; |
312 | if (number >= num_found) | |
313 | num_found = number + 1; | |
314 | } | |
c6782270 | 315 | nodes[found] = 0; |
a53f4a29 SG |
316 | } |
317 | ||
318 | /* Add any nodes not mentioned by an alias */ | |
319 | for (i = j = 0; i < maxcount; i++) { | |
320 | if (!node_list[i]) { | |
321 | for (; j < maxcount; j++) | |
322 | if (nodes[j] && | |
323 | fdtdec_get_is_enabled(blob, nodes[j])) | |
324 | break; | |
325 | ||
326 | /* Have we run out of nodes to add? */ | |
327 | if (j == maxcount) | |
328 | break; | |
329 | ||
330 | assert(!node_list[i]); | |
331 | node_list[i] = nodes[j++]; | |
332 | if (i >= num_found) | |
333 | num_found = i + 1; | |
334 | } | |
335 | } | |
336 | ||
337 | return num_found; | |
338 | } | |
339 | ||
9a263e55 SG |
340 | int fdtdec_check_fdt(void) |
341 | { | |
342 | /* | |
343 | * We must have an FDT, but we cannot panic() yet since the console | |
344 | * is not ready. So for now, just assert(). Boards which need an early | |
345 | * FDT (prior to console ready) will need to make their own | |
346 | * arrangements and do their own checks. | |
347 | */ | |
348 | assert(!fdtdec_prepare_fdt()); | |
349 | return 0; | |
350 | } | |
351 | ||
b5220bc6 SG |
352 | /* |
353 | * This function is a little odd in that it accesses global data. At some | |
354 | * point if the architecture board.c files merge this will make more sense. | |
355 | * Even now, it is common code. | |
356 | */ | |
9a263e55 | 357 | int fdtdec_prepare_fdt(void) |
b5220bc6 | 358 | { |
c309c2da SG |
359 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
360 | fdt_check_header(gd->fdt_blob)) { | |
9a263e55 SG |
361 | printf("No valid FDT found - please append one to U-Boot " |
362 | "binary, use u-boot-dtb.bin or define " | |
a733b06b | 363 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
9a263e55 SG |
364 | return -1; |
365 | } | |
b5220bc6 SG |
366 | return 0; |
367 | } | |
d17da655 SG |
368 | |
369 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) | |
370 | { | |
371 | const u32 *phandle; | |
372 | int lookup; | |
373 | ||
1cb2323b | 374 | debug("%s: %s\n", __func__, prop_name); |
d17da655 SG |
375 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
376 | if (!phandle) | |
377 | return -FDT_ERR_NOTFOUND; | |
378 | ||
379 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); | |
380 | return lookup; | |
381 | } | |
382 | ||
383 | /** | |
384 | * Look up a property in a node and check that it has a minimum length. | |
385 | * | |
386 | * @param blob FDT blob | |
387 | * @param node node to examine | |
388 | * @param prop_name name of property to find | |
389 | * @param min_len minimum property length in bytes | |
390 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not | |
391 | found, or -FDT_ERR_BADLAYOUT if not enough data | |
392 | * @return pointer to cell, which is only valid if err == 0 | |
393 | */ | |
394 | static const void *get_prop_check_min_len(const void *blob, int node, | |
395 | const char *prop_name, int min_len, int *err) | |
396 | { | |
397 | const void *cell; | |
398 | int len; | |
399 | ||
400 | debug("%s: %s\n", __func__, prop_name); | |
401 | cell = fdt_getprop(blob, node, prop_name, &len); | |
402 | if (!cell) | |
403 | *err = -FDT_ERR_NOTFOUND; | |
404 | else if (len < min_len) | |
405 | *err = -FDT_ERR_BADLAYOUT; | |
406 | else | |
407 | *err = 0; | |
408 | return cell; | |
409 | } | |
410 | ||
411 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, | |
412 | u32 *array, int count) | |
413 | { | |
414 | const u32 *cell; | |
415 | int i, err = 0; | |
416 | ||
417 | debug("%s: %s\n", __func__, prop_name); | |
418 | cell = get_prop_check_min_len(blob, node, prop_name, | |
419 | sizeof(u32) * count, &err); | |
420 | if (!err) { | |
421 | for (i = 0; i < count; i++) | |
422 | array[i] = fdt32_to_cpu(cell[i]); | |
423 | } | |
424 | return err; | |
425 | } | |
426 | ||
96875e7d SG |
427 | const u32 *fdtdec_locate_array(const void *blob, int node, |
428 | const char *prop_name, int count) | |
429 | { | |
430 | const u32 *cell; | |
431 | int err; | |
432 | ||
433 | cell = get_prop_check_min_len(blob, node, prop_name, | |
434 | sizeof(u32) * count, &err); | |
435 | return err ? NULL : cell; | |
436 | } | |
437 | ||
d17da655 SG |
438 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
439 | { | |
440 | const s32 *cell; | |
441 | int len; | |
442 | ||
443 | debug("%s: %s\n", __func__, prop_name); | |
444 | cell = fdt_getprop(blob, node, prop_name, &len); | |
445 | return cell != NULL; | |
446 | } | |
ed3ee5cd SG |
447 | |
448 | /** | |
449 | * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no | |
450 | * terminating item. | |
451 | * | |
452 | * @param blob FDT blob to use | |
453 | * @param node Node to look at | |
454 | * @param prop_name Node property name | |
455 | * @param gpio Array of gpio elements to fill from FDT. This will be | |
456 | * untouched if either 0 or an error is returned | |
457 | * @param max_count Maximum number of elements allowed | |
458 | * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would | |
459 | * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. | |
460 | */ | |
5921f6a2 AK |
461 | int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, |
462 | struct fdt_gpio_state *gpio, int max_count) | |
ed3ee5cd SG |
463 | { |
464 | const struct fdt_property *prop; | |
465 | const u32 *cell; | |
466 | const char *name; | |
467 | int len, i; | |
468 | ||
469 | debug("%s: %s\n", __func__, prop_name); | |
470 | assert(max_count > 0); | |
471 | prop = fdt_get_property(blob, node, prop_name, &len); | |
472 | if (!prop) { | |
1cb2323b | 473 | debug("%s: property '%s' missing\n", __func__, prop_name); |
ed3ee5cd SG |
474 | return -FDT_ERR_NOTFOUND; |
475 | } | |
476 | ||
477 | /* We will use the name to tag the GPIO */ | |
478 | name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
479 | cell = (u32 *)prop->data; | |
480 | len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ | |
481 | if (len > max_count) { | |
1cb2323b | 482 | debug(" %s: too many GPIOs / cells for " |
ed3ee5cd SG |
483 | "property '%s'\n", __func__, prop_name); |
484 | return -FDT_ERR_BADLAYOUT; | |
485 | } | |
486 | ||
487 | /* Read out the GPIO data from the cells */ | |
488 | for (i = 0; i < len; i++, cell += 3) { | |
489 | gpio[i].gpio = fdt32_to_cpu(cell[1]); | |
490 | gpio[i].flags = fdt32_to_cpu(cell[2]); | |
491 | gpio[i].name = name; | |
492 | } | |
493 | ||
494 | return len; | |
495 | } | |
496 | ||
497 | int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, | |
498 | struct fdt_gpio_state *gpio) | |
499 | { | |
500 | int err; | |
501 | ||
502 | debug("%s: %s\n", __func__, prop_name); | |
503 | gpio->gpio = FDT_GPIO_NONE; | |
504 | gpio->name = NULL; | |
505 | err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); | |
506 | return err == 1 ? 0 : err; | |
507 | } | |
508 | ||
202ff753 SP |
509 | int fdtdec_get_gpio(struct fdt_gpio_state *gpio) |
510 | { | |
511 | int val; | |
512 | ||
513 | if (!fdt_gpio_isvalid(gpio)) | |
514 | return -1; | |
515 | ||
516 | val = gpio_get_value(gpio->gpio); | |
517 | return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
518 | } | |
519 | ||
520 | int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) | |
521 | { | |
522 | if (!fdt_gpio_isvalid(gpio)) | |
523 | return -1; | |
524 | ||
525 | val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
526 | return gpio_set_value(gpio->gpio, val); | |
527 | } | |
528 | ||
ed3ee5cd SG |
529 | int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) |
530 | { | |
531 | /* | |
532 | * Return success if there is no GPIO defined. This is used for | |
533 | * optional GPIOs) | |
534 | */ | |
535 | if (!fdt_gpio_isvalid(gpio)) | |
536 | return 0; | |
537 | ||
538 | if (gpio_request(gpio->gpio, gpio->name)) | |
539 | return -1; | |
540 | return 0; | |
541 | } | |
bed4d892 AS |
542 | |
543 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, | |
544 | u8 *array, int count) | |
545 | { | |
546 | const u8 *cell; | |
547 | int err; | |
548 | ||
549 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
550 | if (!err) | |
551 | memcpy(array, cell, count); | |
552 | return err; | |
553 | } | |
554 | ||
555 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, | |
556 | const char *prop_name, int count) | |
557 | { | |
558 | const u8 *cell; | |
559 | int err; | |
560 | ||
561 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
562 | if (err) | |
563 | return NULL; | |
564 | return cell; | |
565 | } | |
09258f1e | 566 | |
09258f1e AK |
567 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
568 | int default_val) | |
569 | { | |
570 | int config_node; | |
571 | ||
572 | debug("%s: %s\n", __func__, prop_name); | |
573 | config_node = fdt_path_offset(blob, "/config"); | |
574 | if (config_node < 0) | |
575 | return default_val; | |
576 | return fdtdec_get_int(blob, config_node, prop_name, default_val); | |
577 | } | |
332ab0d5 | 578 | |
79289c0b GB |
579 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
580 | { | |
581 | int config_node; | |
582 | const void *prop; | |
583 | ||
584 | debug("%s: %s\n", __func__, prop_name); | |
585 | config_node = fdt_path_offset(blob, "/config"); | |
586 | if (config_node < 0) | |
587 | return 0; | |
588 | prop = fdt_get_property(blob, config_node, prop_name, NULL); | |
589 | ||
590 | return prop != NULL; | |
591 | } | |
592 | ||
332ab0d5 SG |
593 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
594 | { | |
595 | const char *nodep; | |
596 | int nodeoffset; | |
597 | int len; | |
598 | ||
599 | debug("%s: %s\n", __func__, prop_name); | |
600 | nodeoffset = fdt_path_offset(blob, "/config"); | |
601 | if (nodeoffset < 0) | |
602 | return NULL; | |
603 | ||
604 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); | |
605 | if (!nodep) | |
606 | return NULL; | |
607 | ||
608 | return (char *)nodep; | |
609 | } | |
f20c4619 SG |
610 | |
611 | int fdtdec_decode_region(const void *blob, int node, | |
612 | const char *prop_name, void **ptrp, size_t *size) | |
613 | { | |
614 | const fdt_addr_t *cell; | |
615 | int len; | |
616 | ||
617 | debug("%s: %s\n", __func__, prop_name); | |
618 | cell = fdt_getprop(blob, node, prop_name, &len); | |
619 | if (!cell || (len != sizeof(fdt_addr_t) * 2)) | |
620 | return -1; | |
621 | ||
622 | *ptrp = (void *)fdt_addr_to_cpu(*cell); | |
623 | *size = fdt_size_to_cpu(cell[1]); | |
624 | debug("%s: size=%zx\n", __func__, *size); | |
625 | return 0; | |
626 | } |