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Commit | Line | Data |
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b5220bc6 SG |
1 | /* |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
1a459660 | 3 | * SPDX-License-Identifier: GPL-2.0+ |
b5220bc6 SG |
4 | */ |
5 | ||
29a23f9d | 6 | #ifndef USE_HOSTCC |
b5220bc6 | 7 | #include <common.h> |
5c33c9fd | 8 | #include <errno.h> |
b5220bc6 SG |
9 | #include <serial.h> |
10 | #include <libfdt.h> | |
11 | #include <fdtdec.h> | |
5c33c9fd | 12 | #include <linux/ctype.h> |
b5220bc6 | 13 | |
e46431e1 | 14 | #include <asm/gpio.h> |
ed3ee5cd | 15 | |
b5220bc6 SG |
16 | DECLARE_GLOBAL_DATA_PTR; |
17 | ||
18 | /* | |
19 | * Here are the type we know about. One day we might allow drivers to | |
20 | * register. For now we just put them here. The COMPAT macro allows us to | |
21 | * turn this into a sparse list later, and keeps the ID with the name. | |
22 | */ | |
23 | #define COMPAT(id, name) name | |
24 | static const char * const compat_names[COMPAT_COUNT] = { | |
f88fe2de | 25 | COMPAT(UNKNOWN, "<none>"), |
87f938c9 | 26 | COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), |
7e44d932 JL |
27 | COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), |
28 | COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), | |
e32624ef | 29 | COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"), |
96a78ac0 YL |
30 | COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), |
31 | COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), | |
0e35ad05 JZ |
32 | COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), |
33 | COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), | |
6642a681 | 34 | COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), |
312693c3 | 35 | COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), |
e1ae0d1f | 36 | COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), |
87540de3 | 37 | COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), |
a73ca478 | 38 | COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), |
f4e4e0b0 | 39 | COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), |
c9aa831e | 40 | COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), |
8f1b46b1 | 41 | COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), |
b19f5749 | 42 | COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), |
c3bb3c8b | 43 | COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), |
cc9fe33a HR |
44 | COMPAT(SMSC_LAN9215, "smsc,lan9215"), |
45 | COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), | |
c34253d1 | 46 | COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |
72dbff12 RS |
47 | COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), |
48 | COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), | |
5d50659d | 49 | COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), |
88364387 | 50 | COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), |
713cb680 | 51 | COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), |
6abd1620 | 52 | COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), |
108b85be | 53 | COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), |
6abd1620 | 54 | COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), |
108b85be | 55 | COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), |
618766c0 | 56 | COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), |
d7377b51 | 57 | COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), |
de461c52 | 58 | COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), |
1e4706a7 | 59 | COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), |
7d3ca0f8 | 60 | COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), |
3577fe8b | 61 | COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), |
ee1e3c2f | 62 | COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), |
cd577e2b | 63 | COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), |
bb8215f4 | 64 | COMPAT(GENERIC_SPI_FLASH, "spi-flash"), |
7772bb78 | 65 | COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), |
f6267998 | 66 | COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), |
ec34fa5e | 67 | COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), |
ecbd7e1e | 68 | COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), |
df93d90a | 69 | COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), |
7d95f2a3 | 70 | COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), |
ac1058fd | 71 | COMPAT(TI_TPS65090, "ti,tps65090"), |
a9cf6da9 | 72 | COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), |
45c480c9 | 73 | COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), |
b5220bc6 SG |
74 | }; |
75 | ||
a53f4a29 SG |
76 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
77 | { | |
78 | /* We allow reading of the 'unknown' ID for testing purposes */ | |
79 | assert(id >= 0 && id < COMPAT_COUNT); | |
80 | return compat_names[id]; | |
81 | } | |
82 | ||
4397a2a8 SG |
83 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
84 | const char *prop_name, fdt_size_t *sizep) | |
b5220bc6 SG |
85 | { |
86 | const fdt_addr_t *cell; | |
87 | int len; | |
88 | ||
1cb2323b | 89 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 90 | cell = fdt_getprop(blob, node, prop_name, &len); |
4397a2a8 SG |
91 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
92 | len == sizeof(fdt_addr_t) * 2)) { | |
1cb2323b | 93 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
4397a2a8 SG |
94 | if (sizep) { |
95 | const fdt_size_t *size; | |
1cb2323b | 96 | |
4397a2a8 SG |
97 | size = (fdt_size_t *)((char *)cell + |
98 | sizeof(fdt_addr_t)); | |
99 | *sizep = fdt_size_to_cpu(*size); | |
370b6c5c SG |
100 | debug("addr=%08lx, size=%08x\n", |
101 | (ulong)addr, *sizep); | |
4397a2a8 | 102 | } else { |
370b6c5c | 103 | debug("%08lx\n", (ulong)addr); |
4397a2a8 | 104 | } |
1cb2323b SG |
105 | return addr; |
106 | } | |
107 | debug("(not found)\n"); | |
b5220bc6 SG |
108 | return FDT_ADDR_T_NONE; |
109 | } | |
110 | ||
4397a2a8 SG |
111 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
112 | const char *prop_name) | |
113 | { | |
114 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); | |
115 | } | |
116 | ||
aadef0a1 CLC |
117 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
118 | uint64_t default_val) | |
119 | { | |
120 | const uint64_t *cell64; | |
121 | int length; | |
122 | ||
123 | cell64 = fdt_getprop(blob, node, prop_name, &length); | |
124 | if (!cell64 || length < sizeof(*cell64)) | |
125 | return default_val; | |
126 | ||
127 | return fdt64_to_cpu(*cell64); | |
128 | } | |
129 | ||
f88fe2de | 130 | int fdtdec_get_is_enabled(const void *blob, int node) |
b5220bc6 SG |
131 | { |
132 | const char *cell; | |
133 | ||
f88fe2de SG |
134 | /* |
135 | * It should say "okay", so only allow that. Some fdts use "ok" but | |
136 | * this is a bug. Please fix your device tree source file. See here | |
137 | * for discussion: | |
138 | * | |
139 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html | |
140 | */ | |
b5220bc6 SG |
141 | cell = fdt_getprop(blob, node, "status", NULL); |
142 | if (cell) | |
f88fe2de SG |
143 | return 0 == strcmp(cell, "okay"); |
144 | return 1; | |
b5220bc6 SG |
145 | } |
146 | ||
7cde397b | 147 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
b5220bc6 SG |
148 | { |
149 | enum fdt_compat_id id; | |
150 | ||
151 | /* Search our drivers */ | |
152 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) | |
153 | if (0 == fdt_node_check_compatible(blob, node, | |
154 | compat_names[id])) | |
155 | return id; | |
156 | return COMPAT_UNKNOWN; | |
157 | } | |
158 | ||
159 | int fdtdec_next_compatible(const void *blob, int node, | |
160 | enum fdt_compat_id id) | |
161 | { | |
162 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); | |
163 | } | |
164 | ||
3ddecfc7 SG |
165 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
166 | enum fdt_compat_id id, int *depthp) | |
167 | { | |
168 | do { | |
169 | node = fdt_next_node(blob, node, depthp); | |
170 | } while (*depthp > 1); | |
171 | ||
172 | /* If this is a direct subnode, and compatible, return it */ | |
173 | if (*depthp == 1 && 0 == fdt_node_check_compatible( | |
174 | blob, node, compat_names[id])) | |
175 | return node; | |
176 | ||
177 | return -FDT_ERR_NOTFOUND; | |
178 | } | |
179 | ||
b5220bc6 SG |
180 | int fdtdec_next_alias(const void *blob, const char *name, |
181 | enum fdt_compat_id id, int *upto) | |
182 | { | |
183 | #define MAX_STR_LEN 20 | |
184 | char str[MAX_STR_LEN + 20]; | |
185 | int node, err; | |
186 | ||
187 | /* snprintf() is not available */ | |
188 | assert(strlen(name) < MAX_STR_LEN); | |
189 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); | |
00878476 | 190 | node = fdt_path_offset(blob, str); |
b5220bc6 SG |
191 | if (node < 0) |
192 | return node; | |
193 | err = fdt_node_check_compatible(blob, node, compat_names[id]); | |
194 | if (err < 0) | |
195 | return err; | |
f88fe2de SG |
196 | if (err) |
197 | return -FDT_ERR_NOTFOUND; | |
198 | (*upto)++; | |
199 | return node; | |
b5220bc6 SG |
200 | } |
201 | ||
a53f4a29 SG |
202 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
203 | enum fdt_compat_id id, int *node_list, int maxcount) | |
c6782270 SG |
204 | { |
205 | memset(node_list, '\0', sizeof(*node_list) * maxcount); | |
206 | ||
207 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); | |
208 | } | |
209 | ||
210 | /* TODO: Can we tighten this code up a little? */ | |
211 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, | |
212 | enum fdt_compat_id id, int *node_list, int maxcount) | |
a53f4a29 SG |
213 | { |
214 | int name_len = strlen(name); | |
215 | int nodes[maxcount]; | |
216 | int num_found = 0; | |
217 | int offset, node; | |
218 | int alias_node; | |
219 | int count; | |
220 | int i, j; | |
221 | ||
222 | /* find the alias node if present */ | |
223 | alias_node = fdt_path_offset(blob, "/aliases"); | |
224 | ||
225 | /* | |
226 | * start with nothing, and we can assume that the root node can't | |
227 | * match | |
228 | */ | |
229 | memset(nodes, '\0', sizeof(nodes)); | |
230 | ||
231 | /* First find all the compatible nodes */ | |
232 | for (node = count = 0; node >= 0 && count < maxcount;) { | |
233 | node = fdtdec_next_compatible(blob, node, id); | |
234 | if (node >= 0) | |
235 | nodes[count++] = node; | |
236 | } | |
237 | if (node >= 0) | |
238 | debug("%s: warning: maxcount exceeded with alias '%s'\n", | |
239 | __func__, name); | |
240 | ||
241 | /* Now find all the aliases */ | |
a53f4a29 SG |
242 | for (offset = fdt_first_property_offset(blob, alias_node); |
243 | offset > 0; | |
244 | offset = fdt_next_property_offset(blob, offset)) { | |
245 | const struct fdt_property *prop; | |
246 | const char *path; | |
247 | int number; | |
248 | int found; | |
249 | ||
250 | node = 0; | |
251 | prop = fdt_get_property_by_offset(blob, offset, NULL); | |
252 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
253 | if (prop->len && 0 == strncmp(path, name, name_len)) | |
254 | node = fdt_path_offset(blob, prop->data); | |
255 | if (node <= 0) | |
256 | continue; | |
257 | ||
258 | /* Get the alias number */ | |
259 | number = simple_strtoul(path + name_len, NULL, 10); | |
260 | if (number < 0 || number >= maxcount) { | |
261 | debug("%s: warning: alias '%s' is out of range\n", | |
262 | __func__, path); | |
263 | continue; | |
264 | } | |
265 | ||
266 | /* Make sure the node we found is actually in our list! */ | |
267 | found = -1; | |
268 | for (j = 0; j < count; j++) | |
269 | if (nodes[j] == node) { | |
270 | found = j; | |
271 | break; | |
272 | } | |
273 | ||
274 | if (found == -1) { | |
275 | debug("%s: warning: alias '%s' points to a node " | |
276 | "'%s' that is missing or is not compatible " | |
277 | " with '%s'\n", __func__, path, | |
278 | fdt_get_name(blob, node, NULL), | |
279 | compat_names[id]); | |
280 | continue; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Add this node to our list in the right place, and mark | |
285 | * it as done. | |
286 | */ | |
287 | if (fdtdec_get_is_enabled(blob, node)) { | |
c6782270 SG |
288 | if (node_list[number]) { |
289 | debug("%s: warning: alias '%s' requires that " | |
290 | "a node be placed in the list in a " | |
291 | "position which is already filled by " | |
292 | "node '%s'\n", __func__, path, | |
293 | fdt_get_name(blob, node, NULL)); | |
294 | continue; | |
295 | } | |
a53f4a29 SG |
296 | node_list[number] = node; |
297 | if (number >= num_found) | |
298 | num_found = number + 1; | |
299 | } | |
c6782270 | 300 | nodes[found] = 0; |
a53f4a29 SG |
301 | } |
302 | ||
303 | /* Add any nodes not mentioned by an alias */ | |
304 | for (i = j = 0; i < maxcount; i++) { | |
305 | if (!node_list[i]) { | |
306 | for (; j < maxcount; j++) | |
307 | if (nodes[j] && | |
308 | fdtdec_get_is_enabled(blob, nodes[j])) | |
309 | break; | |
310 | ||
311 | /* Have we run out of nodes to add? */ | |
312 | if (j == maxcount) | |
313 | break; | |
314 | ||
315 | assert(!node_list[i]); | |
316 | node_list[i] = nodes[j++]; | |
317 | if (i >= num_found) | |
318 | num_found = i + 1; | |
319 | } | |
320 | } | |
321 | ||
322 | return num_found; | |
323 | } | |
324 | ||
5c33c9fd SG |
325 | int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, |
326 | int *seqp) | |
327 | { | |
328 | int base_len = strlen(base); | |
329 | const char *find_name; | |
330 | int find_namelen; | |
331 | int prop_offset; | |
332 | int aliases; | |
333 | ||
334 | find_name = fdt_get_name(blob, offset, &find_namelen); | |
335 | debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); | |
336 | ||
337 | aliases = fdt_path_offset(blob, "/aliases"); | |
338 | for (prop_offset = fdt_first_property_offset(blob, aliases); | |
339 | prop_offset > 0; | |
340 | prop_offset = fdt_next_property_offset(blob, prop_offset)) { | |
341 | const char *prop; | |
342 | const char *name; | |
343 | const char *slash; | |
344 | const char *p; | |
345 | int len; | |
346 | ||
347 | prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); | |
348 | debug(" - %s, %s\n", name, prop); | |
349 | if (len < find_namelen || *prop != '/' || prop[len - 1] || | |
350 | strncmp(name, base, base_len)) | |
351 | continue; | |
352 | ||
353 | slash = strrchr(prop, '/'); | |
354 | if (strcmp(slash + 1, find_name)) | |
355 | continue; | |
356 | for (p = name; *p; p++) { | |
357 | if (isdigit(*p)) { | |
358 | *seqp = simple_strtoul(p, NULL, 10); | |
359 | debug("Found seq %d\n", *seqp); | |
360 | return 0; | |
361 | } | |
362 | } | |
363 | } | |
364 | ||
365 | debug("Not found\n"); | |
366 | return -ENOENT; | |
367 | } | |
368 | ||
3234aa4b SG |
369 | int fdtdec_get_alias_node(const void *blob, const char *name) |
370 | { | |
371 | const char *prop; | |
372 | int alias_node; | |
373 | int len; | |
374 | ||
375 | if (!blob) | |
376 | return -FDT_ERR_NOTFOUND; | |
377 | alias_node = fdt_path_offset(blob, "/aliases"); | |
378 | prop = fdt_getprop(blob, alias_node, name, &len); | |
379 | if (!prop) | |
380 | return -FDT_ERR_NOTFOUND; | |
381 | return fdt_path_offset(blob, prop); | |
382 | } | |
383 | ||
9a263e55 SG |
384 | int fdtdec_check_fdt(void) |
385 | { | |
386 | /* | |
387 | * We must have an FDT, but we cannot panic() yet since the console | |
388 | * is not ready. So for now, just assert(). Boards which need an early | |
389 | * FDT (prior to console ready) will need to make their own | |
390 | * arrangements and do their own checks. | |
391 | */ | |
392 | assert(!fdtdec_prepare_fdt()); | |
393 | return 0; | |
394 | } | |
395 | ||
b5220bc6 SG |
396 | /* |
397 | * This function is a little odd in that it accesses global data. At some | |
398 | * point if the architecture board.c files merge this will make more sense. | |
399 | * Even now, it is common code. | |
400 | */ | |
9a263e55 | 401 | int fdtdec_prepare_fdt(void) |
b5220bc6 | 402 | { |
c309c2da SG |
403 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
404 | fdt_check_header(gd->fdt_blob)) { | |
9a263e55 SG |
405 | printf("No valid FDT found - please append one to U-Boot " |
406 | "binary, use u-boot-dtb.bin or define " | |
a733b06b | 407 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
9a263e55 SG |
408 | return -1; |
409 | } | |
b5220bc6 SG |
410 | return 0; |
411 | } | |
d17da655 SG |
412 | |
413 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) | |
414 | { | |
415 | const u32 *phandle; | |
416 | int lookup; | |
417 | ||
1cb2323b | 418 | debug("%s: %s\n", __func__, prop_name); |
d17da655 SG |
419 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
420 | if (!phandle) | |
421 | return -FDT_ERR_NOTFOUND; | |
422 | ||
423 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); | |
424 | return lookup; | |
425 | } | |
426 | ||
427 | /** | |
428 | * Look up a property in a node and check that it has a minimum length. | |
429 | * | |
430 | * @param blob FDT blob | |
431 | * @param node node to examine | |
432 | * @param prop_name name of property to find | |
433 | * @param min_len minimum property length in bytes | |
434 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not | |
435 | found, or -FDT_ERR_BADLAYOUT if not enough data | |
436 | * @return pointer to cell, which is only valid if err == 0 | |
437 | */ | |
438 | static const void *get_prop_check_min_len(const void *blob, int node, | |
439 | const char *prop_name, int min_len, int *err) | |
440 | { | |
441 | const void *cell; | |
442 | int len; | |
443 | ||
444 | debug("%s: %s\n", __func__, prop_name); | |
445 | cell = fdt_getprop(blob, node, prop_name, &len); | |
446 | if (!cell) | |
447 | *err = -FDT_ERR_NOTFOUND; | |
448 | else if (len < min_len) | |
449 | *err = -FDT_ERR_BADLAYOUT; | |
450 | else | |
451 | *err = 0; | |
452 | return cell; | |
453 | } | |
454 | ||
455 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, | |
456 | u32 *array, int count) | |
457 | { | |
458 | const u32 *cell; | |
459 | int i, err = 0; | |
460 | ||
461 | debug("%s: %s\n", __func__, prop_name); | |
462 | cell = get_prop_check_min_len(blob, node, prop_name, | |
463 | sizeof(u32) * count, &err); | |
464 | if (!err) { | |
465 | for (i = 0; i < count; i++) | |
466 | array[i] = fdt32_to_cpu(cell[i]); | |
467 | } | |
468 | return err; | |
469 | } | |
470 | ||
96875e7d SG |
471 | const u32 *fdtdec_locate_array(const void *blob, int node, |
472 | const char *prop_name, int count) | |
473 | { | |
474 | const u32 *cell; | |
475 | int err; | |
476 | ||
477 | cell = get_prop_check_min_len(blob, node, prop_name, | |
478 | sizeof(u32) * count, &err); | |
479 | return err ? NULL : cell; | |
480 | } | |
481 | ||
d17da655 SG |
482 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
483 | { | |
484 | const s32 *cell; | |
485 | int len; | |
486 | ||
487 | debug("%s: %s\n", __func__, prop_name); | |
488 | cell = fdt_getprop(blob, node, prop_name, &len); | |
489 | return cell != NULL; | |
490 | } | |
ed3ee5cd SG |
491 | |
492 | /** | |
493 | * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no | |
494 | * terminating item. | |
495 | * | |
496 | * @param blob FDT blob to use | |
497 | * @param node Node to look at | |
498 | * @param prop_name Node property name | |
499 | * @param gpio Array of gpio elements to fill from FDT. This will be | |
500 | * untouched if either 0 or an error is returned | |
501 | * @param max_count Maximum number of elements allowed | |
502 | * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would | |
503 | * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. | |
504 | */ | |
5921f6a2 AK |
505 | int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, |
506 | struct fdt_gpio_state *gpio, int max_count) | |
ed3ee5cd SG |
507 | { |
508 | const struct fdt_property *prop; | |
509 | const u32 *cell; | |
510 | const char *name; | |
511 | int len, i; | |
512 | ||
513 | debug("%s: %s\n", __func__, prop_name); | |
514 | assert(max_count > 0); | |
515 | prop = fdt_get_property(blob, node, prop_name, &len); | |
516 | if (!prop) { | |
1cb2323b | 517 | debug("%s: property '%s' missing\n", __func__, prop_name); |
ed3ee5cd SG |
518 | return -FDT_ERR_NOTFOUND; |
519 | } | |
520 | ||
521 | /* We will use the name to tag the GPIO */ | |
522 | name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
523 | cell = (u32 *)prop->data; | |
524 | len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ | |
525 | if (len > max_count) { | |
1cb2323b | 526 | debug(" %s: too many GPIOs / cells for " |
ed3ee5cd SG |
527 | "property '%s'\n", __func__, prop_name); |
528 | return -FDT_ERR_BADLAYOUT; | |
529 | } | |
530 | ||
531 | /* Read out the GPIO data from the cells */ | |
532 | for (i = 0; i < len; i++, cell += 3) { | |
533 | gpio[i].gpio = fdt32_to_cpu(cell[1]); | |
534 | gpio[i].flags = fdt32_to_cpu(cell[2]); | |
535 | gpio[i].name = name; | |
536 | } | |
537 | ||
538 | return len; | |
539 | } | |
540 | ||
541 | int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, | |
542 | struct fdt_gpio_state *gpio) | |
543 | { | |
544 | int err; | |
545 | ||
546 | debug("%s: %s\n", __func__, prop_name); | |
547 | gpio->gpio = FDT_GPIO_NONE; | |
548 | gpio->name = NULL; | |
549 | err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); | |
550 | return err == 1 ? 0 : err; | |
551 | } | |
552 | ||
202ff753 SP |
553 | int fdtdec_get_gpio(struct fdt_gpio_state *gpio) |
554 | { | |
555 | int val; | |
556 | ||
557 | if (!fdt_gpio_isvalid(gpio)) | |
558 | return -1; | |
559 | ||
560 | val = gpio_get_value(gpio->gpio); | |
561 | return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
562 | } | |
563 | ||
564 | int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) | |
565 | { | |
566 | if (!fdt_gpio_isvalid(gpio)) | |
567 | return -1; | |
568 | ||
569 | val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
570 | return gpio_set_value(gpio->gpio, val); | |
571 | } | |
572 | ||
ed3ee5cd SG |
573 | int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) |
574 | { | |
575 | /* | |
576 | * Return success if there is no GPIO defined. This is used for | |
577 | * optional GPIOs) | |
578 | */ | |
579 | if (!fdt_gpio_isvalid(gpio)) | |
580 | return 0; | |
581 | ||
582 | if (gpio_request(gpio->gpio, gpio->name)) | |
583 | return -1; | |
584 | return 0; | |
585 | } | |
bed4d892 AS |
586 | |
587 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, | |
588 | u8 *array, int count) | |
589 | { | |
590 | const u8 *cell; | |
591 | int err; | |
592 | ||
593 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
594 | if (!err) | |
595 | memcpy(array, cell, count); | |
596 | return err; | |
597 | } | |
598 | ||
599 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, | |
600 | const char *prop_name, int count) | |
601 | { | |
602 | const u8 *cell; | |
603 | int err; | |
604 | ||
605 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
606 | if (err) | |
607 | return NULL; | |
608 | return cell; | |
609 | } | |
09258f1e | 610 | |
09258f1e AK |
611 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
612 | int default_val) | |
613 | { | |
614 | int config_node; | |
615 | ||
616 | debug("%s: %s\n", __func__, prop_name); | |
617 | config_node = fdt_path_offset(blob, "/config"); | |
618 | if (config_node < 0) | |
619 | return default_val; | |
620 | return fdtdec_get_int(blob, config_node, prop_name, default_val); | |
621 | } | |
332ab0d5 | 622 | |
79289c0b GB |
623 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
624 | { | |
625 | int config_node; | |
626 | const void *prop; | |
627 | ||
628 | debug("%s: %s\n", __func__, prop_name); | |
629 | config_node = fdt_path_offset(blob, "/config"); | |
630 | if (config_node < 0) | |
631 | return 0; | |
632 | prop = fdt_get_property(blob, config_node, prop_name, NULL); | |
633 | ||
634 | return prop != NULL; | |
635 | } | |
636 | ||
332ab0d5 SG |
637 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
638 | { | |
639 | const char *nodep; | |
640 | int nodeoffset; | |
641 | int len; | |
642 | ||
643 | debug("%s: %s\n", __func__, prop_name); | |
644 | nodeoffset = fdt_path_offset(blob, "/config"); | |
645 | if (nodeoffset < 0) | |
646 | return NULL; | |
647 | ||
648 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); | |
649 | if (!nodep) | |
650 | return NULL; | |
651 | ||
652 | return (char *)nodep; | |
653 | } | |
f20c4619 SG |
654 | |
655 | int fdtdec_decode_region(const void *blob, int node, | |
656 | const char *prop_name, void **ptrp, size_t *size) | |
657 | { | |
658 | const fdt_addr_t *cell; | |
659 | int len; | |
660 | ||
661 | debug("%s: %s\n", __func__, prop_name); | |
662 | cell = fdt_getprop(blob, node, prop_name, &len); | |
663 | if (!cell || (len != sizeof(fdt_addr_t) * 2)) | |
664 | return -1; | |
665 | ||
370b6c5c | 666 | *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size); |
f20c4619 SG |
667 | *size = fdt_size_to_cpu(cell[1]); |
668 | debug("%s: size=%zx\n", __func__, *size); | |
669 | return 0; | |
670 | } | |
006e73b9 SG |
671 | |
672 | /** | |
673 | * Read a flash entry from the fdt | |
674 | * | |
675 | * @param blob FDT blob | |
676 | * @param node Offset of node to read | |
677 | * @param name Name of node being read | |
678 | * @param entry Place to put offset and size of this node | |
679 | * @return 0 if ok, -ve on error | |
680 | */ | |
681 | int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, | |
682 | struct fmap_entry *entry) | |
683 | { | |
684 | u32 reg[2]; | |
685 | ||
686 | if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { | |
687 | debug("Node '%s' has bad/missing 'reg' property\n", name); | |
688 | return -FDT_ERR_NOTFOUND; | |
689 | } | |
690 | entry->offset = reg[0]; | |
691 | entry->length = reg[1]; | |
692 | ||
693 | return 0; | |
694 | } | |
29a23f9d | 695 | #endif |