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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"), |
79c7a90f | 44 | COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), |
cc9fe33a HR |
45 | COMPAT(SMSC_LAN9215, "smsc,lan9215"), |
46 | COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), | |
c34253d1 | 47 | COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |
72dbff12 RS |
48 | COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), |
49 | COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), | |
5d50659d | 50 | COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), |
88364387 | 51 | COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), |
713cb680 | 52 | COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), |
6abd1620 | 53 | COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), |
108b85be | 54 | COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), |
6abd1620 | 55 | COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), |
108b85be | 56 | COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), |
618766c0 | 57 | COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), |
d7377b51 | 58 | COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), |
de461c52 | 59 | COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), |
1e4706a7 | 60 | COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), |
7d3ca0f8 | 61 | COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), |
3577fe8b | 62 | COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), |
ee1e3c2f | 63 | COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), |
cd577e2b | 64 | COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), |
bb8215f4 | 65 | COMPAT(GENERIC_SPI_FLASH, "spi-flash"), |
7772bb78 | 66 | COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), |
f6267998 | 67 | COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), |
ec34fa5e | 68 | COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), |
ecbd7e1e | 69 | COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), |
df93d90a | 70 | COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), |
7d95f2a3 | 71 | COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), |
ac1058fd | 72 | COMPAT(TI_TPS65090, "ti,tps65090"), |
a9cf6da9 | 73 | COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), |
45c480c9 | 74 | COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), |
9e8f664e | 75 | COMPAT(PARADE_PS8625, "parade,ps8625"), |
ca42d3f7 | 76 | COMPAT(COMPAT_INTEL_LPC, "intel,lpc"), |
77f9b1fb | 77 | COMPAT(INTEL_MICROCODE, "intel,microcode"), |
65dd74a6 | 78 | COMPAT(MEMORY_SPD, "memory-spd"), |
3ac83935 | 79 | COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), |
bb80be39 | 80 | COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), |
effcf067 | 81 | COMPAT(INTEL_GMA, "intel,gma"), |
6173c45b | 82 | COMPAT(AMS_AS3722, "ams,as3722"), |
b5220bc6 SG |
83 | }; |
84 | ||
a53f4a29 SG |
85 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
86 | { | |
87 | /* We allow reading of the 'unknown' ID for testing purposes */ | |
88 | assert(id >= 0 && id < COMPAT_COUNT); | |
89 | return compat_names[id]; | |
90 | } | |
91 | ||
4397a2a8 SG |
92 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
93 | const char *prop_name, fdt_size_t *sizep) | |
b5220bc6 SG |
94 | { |
95 | const fdt_addr_t *cell; | |
96 | int len; | |
97 | ||
1cb2323b | 98 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 99 | cell = fdt_getprop(blob, node, prop_name, &len); |
4397a2a8 SG |
100 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
101 | len == sizeof(fdt_addr_t) * 2)) { | |
1cb2323b | 102 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
4397a2a8 SG |
103 | if (sizep) { |
104 | const fdt_size_t *size; | |
1cb2323b | 105 | |
4397a2a8 SG |
106 | size = (fdt_size_t *)((char *)cell + |
107 | sizeof(fdt_addr_t)); | |
108 | *sizep = fdt_size_to_cpu(*size); | |
370b6c5c SG |
109 | debug("addr=%08lx, size=%08x\n", |
110 | (ulong)addr, *sizep); | |
4397a2a8 | 111 | } else { |
370b6c5c | 112 | debug("%08lx\n", (ulong)addr); |
4397a2a8 | 113 | } |
1cb2323b SG |
114 | return addr; |
115 | } | |
116 | debug("(not found)\n"); | |
b5220bc6 SG |
117 | return FDT_ADDR_T_NONE; |
118 | } | |
119 | ||
4397a2a8 SG |
120 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
121 | const char *prop_name) | |
122 | { | |
123 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); | |
124 | } | |
125 | ||
aadef0a1 CLC |
126 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
127 | uint64_t default_val) | |
128 | { | |
129 | const uint64_t *cell64; | |
130 | int length; | |
131 | ||
132 | cell64 = fdt_getprop(blob, node, prop_name, &length); | |
133 | if (!cell64 || length < sizeof(*cell64)) | |
134 | return default_val; | |
135 | ||
136 | return fdt64_to_cpu(*cell64); | |
137 | } | |
138 | ||
f88fe2de | 139 | int fdtdec_get_is_enabled(const void *blob, int node) |
b5220bc6 SG |
140 | { |
141 | const char *cell; | |
142 | ||
f88fe2de SG |
143 | /* |
144 | * It should say "okay", so only allow that. Some fdts use "ok" but | |
145 | * this is a bug. Please fix your device tree source file. See here | |
146 | * for discussion: | |
147 | * | |
148 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html | |
149 | */ | |
b5220bc6 SG |
150 | cell = fdt_getprop(blob, node, "status", NULL); |
151 | if (cell) | |
f88fe2de SG |
152 | return 0 == strcmp(cell, "okay"); |
153 | return 1; | |
b5220bc6 SG |
154 | } |
155 | ||
7cde397b | 156 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
b5220bc6 SG |
157 | { |
158 | enum fdt_compat_id id; | |
159 | ||
160 | /* Search our drivers */ | |
161 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) | |
162 | if (0 == fdt_node_check_compatible(blob, node, | |
163 | compat_names[id])) | |
164 | return id; | |
165 | return COMPAT_UNKNOWN; | |
166 | } | |
167 | ||
168 | int fdtdec_next_compatible(const void *blob, int node, | |
169 | enum fdt_compat_id id) | |
170 | { | |
171 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); | |
172 | } | |
173 | ||
3ddecfc7 SG |
174 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
175 | enum fdt_compat_id id, int *depthp) | |
176 | { | |
177 | do { | |
178 | node = fdt_next_node(blob, node, depthp); | |
179 | } while (*depthp > 1); | |
180 | ||
181 | /* If this is a direct subnode, and compatible, return it */ | |
182 | if (*depthp == 1 && 0 == fdt_node_check_compatible( | |
183 | blob, node, compat_names[id])) | |
184 | return node; | |
185 | ||
186 | return -FDT_ERR_NOTFOUND; | |
187 | } | |
188 | ||
b5220bc6 SG |
189 | int fdtdec_next_alias(const void *blob, const char *name, |
190 | enum fdt_compat_id id, int *upto) | |
191 | { | |
192 | #define MAX_STR_LEN 20 | |
193 | char str[MAX_STR_LEN + 20]; | |
194 | int node, err; | |
195 | ||
196 | /* snprintf() is not available */ | |
197 | assert(strlen(name) < MAX_STR_LEN); | |
198 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); | |
00878476 | 199 | node = fdt_path_offset(blob, str); |
b5220bc6 SG |
200 | if (node < 0) |
201 | return node; | |
202 | err = fdt_node_check_compatible(blob, node, compat_names[id]); | |
203 | if (err < 0) | |
204 | return err; | |
f88fe2de SG |
205 | if (err) |
206 | return -FDT_ERR_NOTFOUND; | |
207 | (*upto)++; | |
208 | return node; | |
b5220bc6 SG |
209 | } |
210 | ||
a53f4a29 SG |
211 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
212 | enum fdt_compat_id id, int *node_list, int maxcount) | |
c6782270 SG |
213 | { |
214 | memset(node_list, '\0', sizeof(*node_list) * maxcount); | |
215 | ||
216 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); | |
217 | } | |
218 | ||
219 | /* TODO: Can we tighten this code up a little? */ | |
220 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, | |
221 | enum fdt_compat_id id, int *node_list, int maxcount) | |
a53f4a29 SG |
222 | { |
223 | int name_len = strlen(name); | |
224 | int nodes[maxcount]; | |
225 | int num_found = 0; | |
226 | int offset, node; | |
227 | int alias_node; | |
228 | int count; | |
229 | int i, j; | |
230 | ||
231 | /* find the alias node if present */ | |
232 | alias_node = fdt_path_offset(blob, "/aliases"); | |
233 | ||
234 | /* | |
235 | * start with nothing, and we can assume that the root node can't | |
236 | * match | |
237 | */ | |
238 | memset(nodes, '\0', sizeof(nodes)); | |
239 | ||
240 | /* First find all the compatible nodes */ | |
241 | for (node = count = 0; node >= 0 && count < maxcount;) { | |
242 | node = fdtdec_next_compatible(blob, node, id); | |
243 | if (node >= 0) | |
244 | nodes[count++] = node; | |
245 | } | |
246 | if (node >= 0) | |
247 | debug("%s: warning: maxcount exceeded with alias '%s'\n", | |
248 | __func__, name); | |
249 | ||
250 | /* Now find all the aliases */ | |
a53f4a29 SG |
251 | for (offset = fdt_first_property_offset(blob, alias_node); |
252 | offset > 0; | |
253 | offset = fdt_next_property_offset(blob, offset)) { | |
254 | const struct fdt_property *prop; | |
255 | const char *path; | |
256 | int number; | |
257 | int found; | |
258 | ||
259 | node = 0; | |
260 | prop = fdt_get_property_by_offset(blob, offset, NULL); | |
261 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
262 | if (prop->len && 0 == strncmp(path, name, name_len)) | |
263 | node = fdt_path_offset(blob, prop->data); | |
264 | if (node <= 0) | |
265 | continue; | |
266 | ||
267 | /* Get the alias number */ | |
268 | number = simple_strtoul(path + name_len, NULL, 10); | |
269 | if (number < 0 || number >= maxcount) { | |
270 | debug("%s: warning: alias '%s' is out of range\n", | |
271 | __func__, path); | |
272 | continue; | |
273 | } | |
274 | ||
275 | /* Make sure the node we found is actually in our list! */ | |
276 | found = -1; | |
277 | for (j = 0; j < count; j++) | |
278 | if (nodes[j] == node) { | |
279 | found = j; | |
280 | break; | |
281 | } | |
282 | ||
283 | if (found == -1) { | |
284 | debug("%s: warning: alias '%s' points to a node " | |
285 | "'%s' that is missing or is not compatible " | |
286 | " with '%s'\n", __func__, path, | |
287 | fdt_get_name(blob, node, NULL), | |
288 | compat_names[id]); | |
289 | continue; | |
290 | } | |
291 | ||
292 | /* | |
293 | * Add this node to our list in the right place, and mark | |
294 | * it as done. | |
295 | */ | |
296 | if (fdtdec_get_is_enabled(blob, node)) { | |
c6782270 SG |
297 | if (node_list[number]) { |
298 | debug("%s: warning: alias '%s' requires that " | |
299 | "a node be placed in the list in a " | |
300 | "position which is already filled by " | |
301 | "node '%s'\n", __func__, path, | |
302 | fdt_get_name(blob, node, NULL)); | |
303 | continue; | |
304 | } | |
a53f4a29 SG |
305 | node_list[number] = node; |
306 | if (number >= num_found) | |
307 | num_found = number + 1; | |
308 | } | |
c6782270 | 309 | nodes[found] = 0; |
a53f4a29 SG |
310 | } |
311 | ||
312 | /* Add any nodes not mentioned by an alias */ | |
313 | for (i = j = 0; i < maxcount; i++) { | |
314 | if (!node_list[i]) { | |
315 | for (; j < maxcount; j++) | |
316 | if (nodes[j] && | |
317 | fdtdec_get_is_enabled(blob, nodes[j])) | |
318 | break; | |
319 | ||
320 | /* Have we run out of nodes to add? */ | |
321 | if (j == maxcount) | |
322 | break; | |
323 | ||
324 | assert(!node_list[i]); | |
325 | node_list[i] = nodes[j++]; | |
326 | if (i >= num_found) | |
327 | num_found = i + 1; | |
328 | } | |
329 | } | |
330 | ||
331 | return num_found; | |
332 | } | |
333 | ||
5c33c9fd SG |
334 | int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, |
335 | int *seqp) | |
336 | { | |
337 | int base_len = strlen(base); | |
338 | const char *find_name; | |
339 | int find_namelen; | |
340 | int prop_offset; | |
341 | int aliases; | |
342 | ||
343 | find_name = fdt_get_name(blob, offset, &find_namelen); | |
344 | debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); | |
345 | ||
346 | aliases = fdt_path_offset(blob, "/aliases"); | |
347 | for (prop_offset = fdt_first_property_offset(blob, aliases); | |
348 | prop_offset > 0; | |
349 | prop_offset = fdt_next_property_offset(blob, prop_offset)) { | |
350 | const char *prop; | |
351 | const char *name; | |
352 | const char *slash; | |
353 | const char *p; | |
354 | int len; | |
355 | ||
356 | prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); | |
357 | debug(" - %s, %s\n", name, prop); | |
358 | if (len < find_namelen || *prop != '/' || prop[len - 1] || | |
359 | strncmp(name, base, base_len)) | |
360 | continue; | |
361 | ||
362 | slash = strrchr(prop, '/'); | |
363 | if (strcmp(slash + 1, find_name)) | |
364 | continue; | |
a88340df SG |
365 | for (p = name + strlen(name) - 1; p > name; p--) { |
366 | if (!isdigit(*p)) { | |
367 | *seqp = simple_strtoul(p + 1, NULL, 10); | |
5c33c9fd SG |
368 | debug("Found seq %d\n", *seqp); |
369 | return 0; | |
370 | } | |
371 | } | |
372 | } | |
373 | ||
374 | debug("Not found\n"); | |
375 | return -ENOENT; | |
376 | } | |
377 | ||
aac07d49 SG |
378 | int fdtdec_get_chosen_node(const void *blob, const char *name) |
379 | { | |
380 | const char *prop; | |
381 | int chosen_node; | |
382 | int len; | |
383 | ||
384 | if (!blob) | |
385 | return -FDT_ERR_NOTFOUND; | |
386 | chosen_node = fdt_path_offset(blob, "/chosen"); | |
387 | prop = fdt_getprop(blob, chosen_node, name, &len); | |
388 | if (!prop) | |
389 | return -FDT_ERR_NOTFOUND; | |
390 | return fdt_path_offset(blob, prop); | |
391 | } | |
392 | ||
9a263e55 SG |
393 | int fdtdec_check_fdt(void) |
394 | { | |
395 | /* | |
396 | * We must have an FDT, but we cannot panic() yet since the console | |
397 | * is not ready. So for now, just assert(). Boards which need an early | |
398 | * FDT (prior to console ready) will need to make their own | |
399 | * arrangements and do their own checks. | |
400 | */ | |
401 | assert(!fdtdec_prepare_fdt()); | |
402 | return 0; | |
403 | } | |
404 | ||
b5220bc6 SG |
405 | /* |
406 | * This function is a little odd in that it accesses global data. At some | |
407 | * point if the architecture board.c files merge this will make more sense. | |
408 | * Even now, it is common code. | |
409 | */ | |
9a263e55 | 410 | int fdtdec_prepare_fdt(void) |
b5220bc6 | 411 | { |
c309c2da SG |
412 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
413 | fdt_check_header(gd->fdt_blob)) { | |
9a263e55 SG |
414 | printf("No valid FDT found - please append one to U-Boot " |
415 | "binary, use u-boot-dtb.bin or define " | |
a733b06b | 416 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
9a263e55 SG |
417 | return -1; |
418 | } | |
b5220bc6 SG |
419 | return 0; |
420 | } | |
d17da655 SG |
421 | |
422 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) | |
423 | { | |
424 | const u32 *phandle; | |
425 | int lookup; | |
426 | ||
1cb2323b | 427 | debug("%s: %s\n", __func__, prop_name); |
d17da655 SG |
428 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
429 | if (!phandle) | |
430 | return -FDT_ERR_NOTFOUND; | |
431 | ||
432 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); | |
433 | return lookup; | |
434 | } | |
435 | ||
436 | /** | |
437 | * Look up a property in a node and check that it has a minimum length. | |
438 | * | |
439 | * @param blob FDT blob | |
440 | * @param node node to examine | |
441 | * @param prop_name name of property to find | |
442 | * @param min_len minimum property length in bytes | |
443 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not | |
444 | found, or -FDT_ERR_BADLAYOUT if not enough data | |
445 | * @return pointer to cell, which is only valid if err == 0 | |
446 | */ | |
447 | static const void *get_prop_check_min_len(const void *blob, int node, | |
448 | const char *prop_name, int min_len, int *err) | |
449 | { | |
450 | const void *cell; | |
451 | int len; | |
452 | ||
453 | debug("%s: %s\n", __func__, prop_name); | |
454 | cell = fdt_getprop(blob, node, prop_name, &len); | |
455 | if (!cell) | |
456 | *err = -FDT_ERR_NOTFOUND; | |
457 | else if (len < min_len) | |
458 | *err = -FDT_ERR_BADLAYOUT; | |
459 | else | |
460 | *err = 0; | |
461 | return cell; | |
462 | } | |
463 | ||
464 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, | |
465 | u32 *array, int count) | |
466 | { | |
467 | const u32 *cell; | |
468 | int i, err = 0; | |
469 | ||
470 | debug("%s: %s\n", __func__, prop_name); | |
471 | cell = get_prop_check_min_len(blob, node, prop_name, | |
472 | sizeof(u32) * count, &err); | |
473 | if (!err) { | |
474 | for (i = 0; i < count; i++) | |
475 | array[i] = fdt32_to_cpu(cell[i]); | |
476 | } | |
477 | return err; | |
478 | } | |
479 | ||
a9f04d49 SG |
480 | int fdtdec_get_int_array_count(const void *blob, int node, |
481 | const char *prop_name, u32 *array, int count) | |
482 | { | |
483 | const u32 *cell; | |
484 | int len, elems; | |
485 | int i; | |
486 | ||
487 | debug("%s: %s\n", __func__, prop_name); | |
488 | cell = fdt_getprop(blob, node, prop_name, &len); | |
489 | if (!cell) | |
490 | return -FDT_ERR_NOTFOUND; | |
491 | elems = len / sizeof(u32); | |
492 | if (count > elems) | |
493 | count = elems; | |
494 | for (i = 0; i < count; i++) | |
495 | array[i] = fdt32_to_cpu(cell[i]); | |
496 | ||
497 | return count; | |
498 | } | |
499 | ||
96875e7d SG |
500 | const u32 *fdtdec_locate_array(const void *blob, int node, |
501 | const char *prop_name, int count) | |
502 | { | |
503 | const u32 *cell; | |
504 | int err; | |
505 | ||
506 | cell = get_prop_check_min_len(blob, node, prop_name, | |
507 | sizeof(u32) * count, &err); | |
508 | return err ? NULL : cell; | |
509 | } | |
510 | ||
d17da655 SG |
511 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
512 | { | |
513 | const s32 *cell; | |
514 | int len; | |
515 | ||
516 | debug("%s: %s\n", __func__, prop_name); | |
517 | cell = fdt_getprop(blob, node, prop_name, &len); | |
518 | return cell != NULL; | |
519 | } | |
ed3ee5cd SG |
520 | |
521 | /** | |
522 | * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no | |
523 | * terminating item. | |
524 | * | |
525 | * @param blob FDT blob to use | |
526 | * @param node Node to look at | |
527 | * @param prop_name Node property name | |
528 | * @param gpio Array of gpio elements to fill from FDT. This will be | |
529 | * untouched if either 0 or an error is returned | |
530 | * @param max_count Maximum number of elements allowed | |
531 | * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would | |
532 | * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. | |
533 | */ | |
5921f6a2 AK |
534 | int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, |
535 | struct fdt_gpio_state *gpio, int max_count) | |
ed3ee5cd SG |
536 | { |
537 | const struct fdt_property *prop; | |
538 | const u32 *cell; | |
539 | const char *name; | |
540 | int len, i; | |
541 | ||
542 | debug("%s: %s\n", __func__, prop_name); | |
543 | assert(max_count > 0); | |
544 | prop = fdt_get_property(blob, node, prop_name, &len); | |
545 | if (!prop) { | |
1cb2323b | 546 | debug("%s: property '%s' missing\n", __func__, prop_name); |
ed3ee5cd SG |
547 | return -FDT_ERR_NOTFOUND; |
548 | } | |
549 | ||
550 | /* We will use the name to tag the GPIO */ | |
551 | name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
552 | cell = (u32 *)prop->data; | |
553 | len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ | |
554 | if (len > max_count) { | |
1cb2323b | 555 | debug(" %s: too many GPIOs / cells for " |
ed3ee5cd SG |
556 | "property '%s'\n", __func__, prop_name); |
557 | return -FDT_ERR_BADLAYOUT; | |
558 | } | |
559 | ||
560 | /* Read out the GPIO data from the cells */ | |
561 | for (i = 0; i < len; i++, cell += 3) { | |
562 | gpio[i].gpio = fdt32_to_cpu(cell[1]); | |
563 | gpio[i].flags = fdt32_to_cpu(cell[2]); | |
564 | gpio[i].name = name; | |
565 | } | |
566 | ||
567 | return len; | |
568 | } | |
569 | ||
570 | int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, | |
571 | struct fdt_gpio_state *gpio) | |
572 | { | |
573 | int err; | |
574 | ||
575 | debug("%s: %s\n", __func__, prop_name); | |
576 | gpio->gpio = FDT_GPIO_NONE; | |
577 | gpio->name = NULL; | |
578 | err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); | |
579 | return err == 1 ? 0 : err; | |
580 | } | |
581 | ||
202ff753 SP |
582 | int fdtdec_get_gpio(struct fdt_gpio_state *gpio) |
583 | { | |
584 | int val; | |
585 | ||
586 | if (!fdt_gpio_isvalid(gpio)) | |
587 | return -1; | |
588 | ||
589 | val = gpio_get_value(gpio->gpio); | |
590 | return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
591 | } | |
592 | ||
593 | int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) | |
594 | { | |
595 | if (!fdt_gpio_isvalid(gpio)) | |
596 | return -1; | |
597 | ||
598 | val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
599 | return gpio_set_value(gpio->gpio, val); | |
600 | } | |
601 | ||
ed3ee5cd SG |
602 | int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) |
603 | { | |
604 | /* | |
605 | * Return success if there is no GPIO defined. This is used for | |
606 | * optional GPIOs) | |
607 | */ | |
608 | if (!fdt_gpio_isvalid(gpio)) | |
609 | return 0; | |
610 | ||
611 | if (gpio_request(gpio->gpio, gpio->name)) | |
612 | return -1; | |
613 | return 0; | |
614 | } | |
bed4d892 AS |
615 | |
616 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, | |
617 | u8 *array, int count) | |
618 | { | |
619 | const u8 *cell; | |
620 | int err; | |
621 | ||
622 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
623 | if (!err) | |
624 | memcpy(array, cell, count); | |
625 | return err; | |
626 | } | |
627 | ||
628 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, | |
629 | const char *prop_name, int count) | |
630 | { | |
631 | const u8 *cell; | |
632 | int err; | |
633 | ||
634 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
635 | if (err) | |
636 | return NULL; | |
637 | return cell; | |
638 | } | |
09258f1e | 639 | |
09258f1e AK |
640 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
641 | int default_val) | |
642 | { | |
643 | int config_node; | |
644 | ||
645 | debug("%s: %s\n", __func__, prop_name); | |
646 | config_node = fdt_path_offset(blob, "/config"); | |
647 | if (config_node < 0) | |
648 | return default_val; | |
649 | return fdtdec_get_int(blob, config_node, prop_name, default_val); | |
650 | } | |
332ab0d5 | 651 | |
79289c0b GB |
652 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
653 | { | |
654 | int config_node; | |
655 | const void *prop; | |
656 | ||
657 | debug("%s: %s\n", __func__, prop_name); | |
658 | config_node = fdt_path_offset(blob, "/config"); | |
659 | if (config_node < 0) | |
660 | return 0; | |
661 | prop = fdt_get_property(blob, config_node, prop_name, NULL); | |
662 | ||
663 | return prop != NULL; | |
664 | } | |
665 | ||
332ab0d5 SG |
666 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
667 | { | |
668 | const char *nodep; | |
669 | int nodeoffset; | |
670 | int len; | |
671 | ||
672 | debug("%s: %s\n", __func__, prop_name); | |
673 | nodeoffset = fdt_path_offset(blob, "/config"); | |
674 | if (nodeoffset < 0) | |
675 | return NULL; | |
676 | ||
677 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); | |
678 | if (!nodep) | |
679 | return NULL; | |
680 | ||
681 | return (char *)nodep; | |
682 | } | |
f20c4619 | 683 | |
76489832 SG |
684 | int fdtdec_decode_region(const void *blob, int node, const char *prop_name, |
685 | fdt_addr_t *basep, fdt_size_t *sizep) | |
f20c4619 SG |
686 | { |
687 | const fdt_addr_t *cell; | |
688 | int len; | |
689 | ||
76489832 SG |
690 | debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), |
691 | prop_name); | |
f20c4619 | 692 | cell = fdt_getprop(blob, node, prop_name, &len); |
76489832 SG |
693 | if (!cell || (len < sizeof(fdt_addr_t) * 2)) { |
694 | debug("cell=%p, len=%d\n", cell, len); | |
f20c4619 | 695 | return -1; |
76489832 SG |
696 | } |
697 | ||
698 | *basep = fdt_addr_to_cpu(*cell); | |
699 | *sizep = fdt_size_to_cpu(cell[1]); | |
700 | debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, | |
701 | (ulong)*sizep); | |
f20c4619 | 702 | |
f20c4619 SG |
703 | return 0; |
704 | } | |
006e73b9 SG |
705 | |
706 | /** | |
707 | * Read a flash entry from the fdt | |
708 | * | |
709 | * @param blob FDT blob | |
710 | * @param node Offset of node to read | |
711 | * @param name Name of node being read | |
712 | * @param entry Place to put offset and size of this node | |
713 | * @return 0 if ok, -ve on error | |
714 | */ | |
715 | int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, | |
716 | struct fmap_entry *entry) | |
717 | { | |
f3cc44f9 | 718 | const char *prop; |
006e73b9 SG |
719 | u32 reg[2]; |
720 | ||
721 | if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { | |
722 | debug("Node '%s' has bad/missing 'reg' property\n", name); | |
723 | return -FDT_ERR_NOTFOUND; | |
724 | } | |
725 | entry->offset = reg[0]; | |
726 | entry->length = reg[1]; | |
f3cc44f9 SG |
727 | entry->used = fdtdec_get_int(blob, node, "used", entry->length); |
728 | prop = fdt_getprop(blob, node, "compress", NULL); | |
729 | entry->compress_algo = prop && !strcmp(prop, "lzo") ? | |
730 | FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; | |
731 | prop = fdt_getprop(blob, node, "hash", &entry->hash_size); | |
732 | entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; | |
733 | entry->hash = (uint8_t *)prop; | |
006e73b9 SG |
734 | |
735 | return 0; | |
736 | } | |
56f42242 TR |
737 | |
738 | static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) | |
739 | { | |
740 | u64 number = 0; | |
741 | ||
742 | while (cells--) | |
743 | number = (number << 32) | fdt32_to_cpu(*ptr++); | |
744 | ||
745 | return number; | |
746 | } | |
747 | ||
748 | int fdt_get_resource(const void *fdt, int node, const char *property, | |
749 | unsigned int index, struct fdt_resource *res) | |
750 | { | |
751 | const fdt32_t *ptr, *end; | |
752 | int na, ns, len, parent; | |
753 | unsigned int i = 0; | |
754 | ||
755 | parent = fdt_parent_offset(fdt, node); | |
756 | if (parent < 0) | |
757 | return parent; | |
758 | ||
759 | na = fdt_address_cells(fdt, parent); | |
760 | ns = fdt_size_cells(fdt, parent); | |
761 | ||
762 | ptr = fdt_getprop(fdt, node, property, &len); | |
763 | if (!ptr) | |
764 | return len; | |
765 | ||
766 | end = ptr + len / sizeof(*ptr); | |
767 | ||
768 | while (ptr + na + ns <= end) { | |
769 | if (i == index) { | |
770 | res->start = res->end = fdtdec_get_number(ptr, na); | |
771 | res->end += fdtdec_get_number(&ptr[na], ns) - 1; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | ptr += na + ns; | |
776 | i++; | |
777 | } | |
778 | ||
779 | return -FDT_ERR_NOTFOUND; | |
780 | } | |
781 | ||
782 | int fdt_get_named_resource(const void *fdt, int node, const char *property, | |
783 | const char *prop_names, const char *name, | |
784 | struct fdt_resource *res) | |
785 | { | |
786 | int index; | |
787 | ||
788 | index = fdt_find_string(fdt, node, prop_names, name); | |
789 | if (index < 0) | |
790 | return index; | |
791 | ||
792 | return fdt_get_resource(fdt, node, property, index, res); | |
793 | } | |
9f85eee7 TR |
794 | |
795 | int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf) | |
796 | { | |
797 | const fdt32_t *prop; | |
798 | int len; | |
799 | ||
800 | prop = fdt_getprop(fdt, node, "reg", &len); | |
801 | if (!prop) | |
802 | return len; | |
803 | ||
804 | *bdf = fdt32_to_cpu(*prop) & 0xffffff; | |
805 | ||
806 | return 0; | |
807 | } | |
26403871 SG |
808 | |
809 | int fdtdec_decode_memory_region(const void *blob, int config_node, | |
810 | const char *mem_type, const char *suffix, | |
811 | fdt_addr_t *basep, fdt_size_t *sizep) | |
812 | { | |
813 | char prop_name[50]; | |
814 | const char *mem; | |
815 | fdt_size_t size, offset_size; | |
816 | fdt_addr_t base, offset; | |
817 | int node; | |
818 | ||
819 | if (config_node == -1) { | |
820 | config_node = fdt_path_offset(blob, "/config"); | |
821 | if (config_node < 0) { | |
822 | debug("%s: Cannot find /config node\n", __func__); | |
823 | return -ENOENT; | |
824 | } | |
825 | } | |
826 | if (!suffix) | |
827 | suffix = ""; | |
828 | ||
829 | snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, | |
830 | suffix); | |
831 | mem = fdt_getprop(blob, config_node, prop_name, NULL); | |
832 | if (!mem) { | |
833 | debug("%s: No memory type for '%s', using /memory\n", __func__, | |
834 | prop_name); | |
835 | mem = "/memory"; | |
836 | } | |
837 | ||
838 | node = fdt_path_offset(blob, mem); | |
839 | if (node < 0) { | |
840 | debug("%s: Failed to find node '%s': %s\n", __func__, mem, | |
841 | fdt_strerror(node)); | |
842 | return -ENOENT; | |
843 | } | |
844 | ||
845 | /* | |
846 | * Not strictly correct - the memory may have multiple banks. We just | |
847 | * use the first | |
848 | */ | |
849 | if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { | |
850 | debug("%s: Failed to decode memory region %s\n", __func__, | |
851 | mem); | |
852 | return -EINVAL; | |
853 | } | |
854 | ||
855 | snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, | |
856 | suffix); | |
857 | if (fdtdec_decode_region(blob, config_node, prop_name, &offset, | |
858 | &offset_size)) { | |
859 | debug("%s: Failed to decode memory region '%s'\n", __func__, | |
860 | prop_name); | |
861 | return -EINVAL; | |
862 | } | |
863 | ||
864 | *basep = base + offset; | |
865 | *sizep = offset_size; | |
866 | ||
867 | return 0; | |
868 | } | |
29a23f9d | 869 | #endif |