blob: eb5aa20526fd509618311fdb3b4aab3c6379d46d [file] [log] [blame]
Simon Glassb5220bc2011-10-24 19:15:32 +00001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
Wolfgang Denk1a459662013-07-08 09:37:19 +02003 * SPDX-License-Identifier: GPL-2.0+
Simon Glassb5220bc2011-10-24 19:15:32 +00004 */
5
Heiko Schocher29a23f92014-03-03 12:19:30 +01006#ifndef USE_HOSTCC
Simon Glassb5220bc2011-10-24 19:15:32 +00007#include <common.h>
Simon Glass5c33c9f2014-07-23 06:55:09 -06008#include <errno.h>
Simon Glassb5220bc2011-10-24 19:15:32 +00009#include <serial.h>
10#include <libfdt.h>
11#include <fdtdec.h>
Simon Glass5c33c9f2014-07-23 06:55:09 -060012#include <linux/ctype.h>
Simon Glassb5220bc2011-10-24 19:15:32 +000013
Michal Simeke46431e2012-07-11 02:26:38 +000014#include <asm/gpio.h>
Simon Glassed3ee5c2012-02-27 10:52:36 +000015
Simon Glassb5220bc2011-10-24 19:15:32 +000016DECLARE_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
24static const char * const compat_names[COMPAT_COUNT] = {
Simon Glassf88fe2d2012-02-27 10:52:34 +000025 COMPAT(UNKNOWN, "<none>"),
Simon Glass87f938c2012-02-27 10:52:49 +000026 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
Jim Lin7e44d932013-06-21 19:05:47 +080027 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
28 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
Tom Warrene32624e2013-02-08 07:25:30 +000029 COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
Yen Lin96a78ac2012-03-06 19:00:23 +000030 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
31 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
Jimmy Zhang0e35ad02012-04-02 13:18:52 +000032 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
33 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
Rakesh Iyer6642a682012-04-17 09:01:35 +000034 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
Jim Lin312693c2012-07-29 20:53:29 +000035 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
Simon Glasse1ae0d12012-10-17 13:24:49 +000036 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
Wei Ni87540de2012-10-17 13:24:50 +000037 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
Stephen Warrena73ca472014-01-24 12:46:06 -070038 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
Tom Warrenf4e4e0b2013-03-04 14:07:18 -070039 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
Tom Warrenc9aa8312013-02-21 12:31:30 +000040 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
Allen Martin8f1b46b2013-01-29 13:51:24 +000041 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
Allen Martinb19f5742013-01-29 13:51:28 +000042 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
Allen Martinc3bb3c82013-03-16 18:58:09 +000043 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
Hatim RVcc9fe332012-12-11 00:52:46 +000044 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
45 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
Rajeshwari Shindec34253d2012-12-26 20:03:10 +000046 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
Rajeshwari Shinde72dbff12012-12-26 20:03:16 +000047 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
48 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
Rajeshwari Shinde5d506592012-12-26 20:03:20 +000049 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
Hung-ying Tyan88364382013-05-15 18:27:28 +080050 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
Hung-ying Tyan713cb682013-05-15 18:27:32 +080051 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
Rajeshwari Shinde6abd1622013-01-07 23:35:05 +000052 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053053 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
Rajeshwari Shinde6abd1622013-01-07 23:35:05 +000054 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053055 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
Akshay Saraswat618766c2013-02-25 01:13:01 +000056 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
Ajay Kumard7377b52013-02-21 23:53:00 +000057 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
Piotr Wilczekde461c52014-03-07 14:59:39 +010058 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
Ajay Kumar1e4706a2013-02-21 23:53:05 +000059 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
Jaehoon Chung7d3ca0f2014-05-16 13:59:51 +090060 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
Piotr Wilczek3577fe82014-03-07 14:59:41 +010061 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
Rajeshwari Shindeee1e3c22013-06-24 16:47:20 +053062 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
Rajeshwari Shindecd577e22013-01-08 21:03:38 +000063 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
Simon Glassbb8215f2013-03-11 06:08:08 +000064 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
Rajeshwari Shinde7772bb72013-02-14 19:46:15 +000065 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
Rong Changf6267992013-04-12 10:44:57 +000066 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
Vincent Palatinec34fa52013-04-12 11:04:36 +000067 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
naveen krishna chatradhiecbd7e12013-04-29 15:58:52 -070068 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
Simon Glassdf93d902014-02-27 13:26:12 -070069 COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"),
Simon Glass7d95f2a2014-02-27 13:26:19 -070070 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
Tom Wai-Hong Tamac1058f2014-05-20 06:01:36 -060071 COMPAT(TI_TPS65090, "ti,tps65090"),
Simon Glassa9cf6da2014-05-20 06:01:42 -060072 COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"),
Simon Glassb5220bc2011-10-24 19:15:32 +000073};
74
Simon Glassa53f4a22012-01-17 08:20:50 +000075const char *fdtdec_get_compatible(enum fdt_compat_id id)
76{
77 /* We allow reading of the 'unknown' ID for testing purposes */
78 assert(id >= 0 && id < COMPAT_COUNT);
79 return compat_names[id];
80}
81
Simon Glass4397a2a2013-03-19 04:58:51 +000082fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
83 const char *prop_name, fdt_size_t *sizep)
Simon Glassb5220bc2011-10-24 19:15:32 +000084{
85 const fdt_addr_t *cell;
86 int len;
87
Simon Glass1cb23232012-07-12 05:25:01 +000088 debug("%s: %s: ", __func__, prop_name);
Simon Glassb5220bc2011-10-24 19:15:32 +000089 cell = fdt_getprop(blob, node, prop_name, &len);
Simon Glass4397a2a2013-03-19 04:58:51 +000090 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
91 len == sizeof(fdt_addr_t) * 2)) {
Simon Glass1cb23232012-07-12 05:25:01 +000092 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
Simon Glass4397a2a2013-03-19 04:58:51 +000093 if (sizep) {
94 const fdt_size_t *size;
Simon Glass1cb23232012-07-12 05:25:01 +000095
Simon Glass4397a2a2013-03-19 04:58:51 +000096 size = (fdt_size_t *)((char *)cell +
97 sizeof(fdt_addr_t));
98 *sizep = fdt_size_to_cpu(*size);
Simon Glass370b6c52013-11-10 10:26:54 -070099 debug("addr=%08lx, size=%08x\n",
100 (ulong)addr, *sizep);
Simon Glass4397a2a2013-03-19 04:58:51 +0000101 } else {
Simon Glass370b6c52013-11-10 10:26:54 -0700102 debug("%08lx\n", (ulong)addr);
Simon Glass4397a2a2013-03-19 04:58:51 +0000103 }
Simon Glass1cb23232012-07-12 05:25:01 +0000104 return addr;
105 }
106 debug("(not found)\n");
Simon Glassb5220bc2011-10-24 19:15:32 +0000107 return FDT_ADDR_T_NONE;
108}
109
Simon Glass4397a2a2013-03-19 04:58:51 +0000110fdt_addr_t fdtdec_get_addr(const void *blob, int node,
111 const char *prop_name)
112{
113 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
114}
115
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000116uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
117 uint64_t default_val)
118{
119 const uint64_t *cell64;
120 int length;
121
122 cell64 = fdt_getprop(blob, node, prop_name, &length);
123 if (!cell64 || length < sizeof(*cell64))
124 return default_val;
125
126 return fdt64_to_cpu(*cell64);
127}
128
Simon Glassf88fe2d2012-02-27 10:52:34 +0000129int fdtdec_get_is_enabled(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000130{
131 const char *cell;
132
Simon Glassf88fe2d2012-02-27 10:52:34 +0000133 /*
134 * It should say "okay", so only allow that. Some fdts use "ok" but
135 * this is a bug. Please fix your device tree source file. See here
136 * for discussion:
137 *
138 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
139 */
Simon Glassb5220bc2011-10-24 19:15:32 +0000140 cell = fdt_getprop(blob, node, "status", NULL);
141 if (cell)
Simon Glassf88fe2d2012-02-27 10:52:34 +0000142 return 0 == strcmp(cell, "okay");
143 return 1;
Simon Glassb5220bc2011-10-24 19:15:32 +0000144}
145
Gerald Van Baren7cde3972012-11-12 23:13:54 -0500146enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000147{
148 enum fdt_compat_id id;
149
150 /* Search our drivers */
151 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
152 if (0 == fdt_node_check_compatible(blob, node,
153 compat_names[id]))
154 return id;
155 return COMPAT_UNKNOWN;
156}
157
158int fdtdec_next_compatible(const void *blob, int node,
159 enum fdt_compat_id id)
160{
161 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
162}
163
Simon Glass3ddecfc2012-04-02 13:18:42 +0000164int fdtdec_next_compatible_subnode(const void *blob, int node,
165 enum fdt_compat_id id, int *depthp)
166{
167 do {
168 node = fdt_next_node(blob, node, depthp);
169 } while (*depthp > 1);
170
171 /* If this is a direct subnode, and compatible, return it */
172 if (*depthp == 1 && 0 == fdt_node_check_compatible(
173 blob, node, compat_names[id]))
174 return node;
175
176 return -FDT_ERR_NOTFOUND;
177}
178
Simon Glassb5220bc2011-10-24 19:15:32 +0000179int fdtdec_next_alias(const void *blob, const char *name,
180 enum fdt_compat_id id, int *upto)
181{
182#define MAX_STR_LEN 20
183 char str[MAX_STR_LEN + 20];
184 int node, err;
185
186 /* snprintf() is not available */
187 assert(strlen(name) < MAX_STR_LEN);
188 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
Simon Glass00878472012-10-31 14:02:42 +0000189 node = fdt_path_offset(blob, str);
Simon Glassb5220bc2011-10-24 19:15:32 +0000190 if (node < 0)
191 return node;
192 err = fdt_node_check_compatible(blob, node, compat_names[id]);
193 if (err < 0)
194 return err;
Simon Glassf88fe2d2012-02-27 10:52:34 +0000195 if (err)
196 return -FDT_ERR_NOTFOUND;
197 (*upto)++;
198 return node;
Simon Glassb5220bc2011-10-24 19:15:32 +0000199}
200
Simon Glassa53f4a22012-01-17 08:20:50 +0000201int fdtdec_find_aliases_for_id(const void *blob, const char *name,
202 enum fdt_compat_id id, int *node_list, int maxcount)
203{
Simon Glassc6782272012-02-03 15:13:53 +0000204 memset(node_list, '\0', sizeof(*node_list) * maxcount);
205
206 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
207}
208
209/* TODO: Can we tighten this code up a little? */
210int fdtdec_add_aliases_for_id(const void *blob, const char *name,
211 enum fdt_compat_id id, int *node_list, int maxcount)
212{
Simon Glassa53f4a22012-01-17 08:20:50 +0000213 int name_len = strlen(name);
214 int nodes[maxcount];
215 int num_found = 0;
216 int offset, node;
217 int alias_node;
218 int count;
219 int i, j;
220
221 /* find the alias node if present */
222 alias_node = fdt_path_offset(blob, "/aliases");
223
224 /*
225 * start with nothing, and we can assume that the root node can't
226 * match
227 */
228 memset(nodes, '\0', sizeof(nodes));
229
230 /* First find all the compatible nodes */
231 for (node = count = 0; node >= 0 && count < maxcount;) {
232 node = fdtdec_next_compatible(blob, node, id);
233 if (node >= 0)
234 nodes[count++] = node;
235 }
236 if (node >= 0)
237 debug("%s: warning: maxcount exceeded with alias '%s'\n",
238 __func__, name);
239
240 /* Now find all the aliases */
Simon Glassa53f4a22012-01-17 08:20:50 +0000241 for (offset = fdt_first_property_offset(blob, alias_node);
242 offset > 0;
243 offset = fdt_next_property_offset(blob, offset)) {
244 const struct fdt_property *prop;
245 const char *path;
246 int number;
247 int found;
248
249 node = 0;
250 prop = fdt_get_property_by_offset(blob, offset, NULL);
251 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
252 if (prop->len && 0 == strncmp(path, name, name_len))
253 node = fdt_path_offset(blob, prop->data);
254 if (node <= 0)
255 continue;
256
257 /* Get the alias number */
258 number = simple_strtoul(path + name_len, NULL, 10);
259 if (number < 0 || number >= maxcount) {
260 debug("%s: warning: alias '%s' is out of range\n",
261 __func__, path);
262 continue;
263 }
264
265 /* Make sure the node we found is actually in our list! */
266 found = -1;
267 for (j = 0; j < count; j++)
268 if (nodes[j] == node) {
269 found = j;
270 break;
271 }
272
273 if (found == -1) {
274 debug("%s: warning: alias '%s' points to a node "
275 "'%s' that is missing or is not compatible "
276 " with '%s'\n", __func__, path,
277 fdt_get_name(blob, node, NULL),
278 compat_names[id]);
279 continue;
280 }
281
282 /*
283 * Add this node to our list in the right place, and mark
284 * it as done.
285 */
286 if (fdtdec_get_is_enabled(blob, node)) {
Simon Glassc6782272012-02-03 15:13:53 +0000287 if (node_list[number]) {
288 debug("%s: warning: alias '%s' requires that "
289 "a node be placed in the list in a "
290 "position which is already filled by "
291 "node '%s'\n", __func__, path,
292 fdt_get_name(blob, node, NULL));
293 continue;
294 }
Simon Glassa53f4a22012-01-17 08:20:50 +0000295 node_list[number] = node;
296 if (number >= num_found)
297 num_found = number + 1;
298 }
Simon Glassc6782272012-02-03 15:13:53 +0000299 nodes[found] = 0;
Simon Glassa53f4a22012-01-17 08:20:50 +0000300 }
301
302 /* Add any nodes not mentioned by an alias */
303 for (i = j = 0; i < maxcount; i++) {
304 if (!node_list[i]) {
305 for (; j < maxcount; j++)
306 if (nodes[j] &&
307 fdtdec_get_is_enabled(blob, nodes[j]))
308 break;
309
310 /* Have we run out of nodes to add? */
311 if (j == maxcount)
312 break;
313
314 assert(!node_list[i]);
315 node_list[i] = nodes[j++];
316 if (i >= num_found)
317 num_found = i + 1;
318 }
319 }
320
321 return num_found;
322}
323
Simon Glass5c33c9f2014-07-23 06:55:09 -0600324int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
325 int *seqp)
326{
327 int base_len = strlen(base);
328 const char *find_name;
329 int find_namelen;
330 int prop_offset;
331 int aliases;
332
333 find_name = fdt_get_name(blob, offset, &find_namelen);
334 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
335
336 aliases = fdt_path_offset(blob, "/aliases");
337 for (prop_offset = fdt_first_property_offset(blob, aliases);
338 prop_offset > 0;
339 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
340 const char *prop;
341 const char *name;
342 const char *slash;
343 const char *p;
344 int len;
345
346 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
347 debug(" - %s, %s\n", name, prop);
348 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
349 strncmp(name, base, base_len))
350 continue;
351
352 slash = strrchr(prop, '/');
353 if (strcmp(slash + 1, find_name))
354 continue;
355 for (p = name; *p; p++) {
356 if (isdigit(*p)) {
357 *seqp = simple_strtoul(p, NULL, 10);
358 debug("Found seq %d\n", *seqp);
359 return 0;
360 }
361 }
362 }
363
364 debug("Not found\n");
365 return -ENOENT;
366}
367
Simon Glass3234aa42014-07-23 06:55:16 -0600368int fdtdec_get_alias_node(const void *blob, const char *name)
369{
370 const char *prop;
371 int alias_node;
372 int len;
373
374 if (!blob)
375 return -FDT_ERR_NOTFOUND;
376 alias_node = fdt_path_offset(blob, "/aliases");
377 prop = fdt_getprop(blob, alias_node, name, &len);
378 if (!prop)
379 return -FDT_ERR_NOTFOUND;
380 return fdt_path_offset(blob, prop);
381}
382
Simon Glass9a263e52012-03-28 10:08:24 +0000383int fdtdec_check_fdt(void)
384{
385 /*
386 * We must have an FDT, but we cannot panic() yet since the console
387 * is not ready. So for now, just assert(). Boards which need an early
388 * FDT (prior to console ready) will need to make their own
389 * arrangements and do their own checks.
390 */
391 assert(!fdtdec_prepare_fdt());
392 return 0;
393}
394
Simon Glassb5220bc2011-10-24 19:15:32 +0000395/*
396 * This function is a little odd in that it accesses global data. At some
397 * point if the architecture board.c files merge this will make more sense.
398 * Even now, it is common code.
399 */
Simon Glass9a263e52012-03-28 10:08:24 +0000400int fdtdec_prepare_fdt(void)
Simon Glassb5220bc2011-10-24 19:15:32 +0000401{
Simon Glassc309c2d2013-04-20 08:42:46 +0000402 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
403 fdt_check_header(gd->fdt_blob)) {
Simon Glass9a263e52012-03-28 10:08:24 +0000404 printf("No valid FDT found - please append one to U-Boot "
405 "binary, use u-boot-dtb.bin or define "
Simon Glassa733b062013-04-26 02:53:43 +0000406 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
Simon Glass9a263e52012-03-28 10:08:24 +0000407 return -1;
408 }
Simon Glassb5220bc2011-10-24 19:15:32 +0000409 return 0;
410}
Simon Glassd17da652012-02-27 10:52:35 +0000411
412int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
413{
414 const u32 *phandle;
415 int lookup;
416
Simon Glass1cb23232012-07-12 05:25:01 +0000417 debug("%s: %s\n", __func__, prop_name);
Simon Glassd17da652012-02-27 10:52:35 +0000418 phandle = fdt_getprop(blob, node, prop_name, NULL);
419 if (!phandle)
420 return -FDT_ERR_NOTFOUND;
421
422 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
423 return lookup;
424}
425
426/**
427 * Look up a property in a node and check that it has a minimum length.
428 *
429 * @param blob FDT blob
430 * @param node node to examine
431 * @param prop_name name of property to find
432 * @param min_len minimum property length in bytes
433 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
434 found, or -FDT_ERR_BADLAYOUT if not enough data
435 * @return pointer to cell, which is only valid if err == 0
436 */
437static const void *get_prop_check_min_len(const void *blob, int node,
438 const char *prop_name, int min_len, int *err)
439{
440 const void *cell;
441 int len;
442
443 debug("%s: %s\n", __func__, prop_name);
444 cell = fdt_getprop(blob, node, prop_name, &len);
445 if (!cell)
446 *err = -FDT_ERR_NOTFOUND;
447 else if (len < min_len)
448 *err = -FDT_ERR_BADLAYOUT;
449 else
450 *err = 0;
451 return cell;
452}
453
454int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
455 u32 *array, int count)
456{
457 const u32 *cell;
458 int i, err = 0;
459
460 debug("%s: %s\n", __func__, prop_name);
461 cell = get_prop_check_min_len(blob, node, prop_name,
462 sizeof(u32) * count, &err);
463 if (!err) {
464 for (i = 0; i < count; i++)
465 array[i] = fdt32_to_cpu(cell[i]);
466 }
467 return err;
468}
469
Simon Glass96875e72012-04-02 13:18:41 +0000470const u32 *fdtdec_locate_array(const void *blob, int node,
471 const char *prop_name, int count)
472{
473 const u32 *cell;
474 int err;
475
476 cell = get_prop_check_min_len(blob, node, prop_name,
477 sizeof(u32) * count, &err);
478 return err ? NULL : cell;
479}
480
Simon Glassd17da652012-02-27 10:52:35 +0000481int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
482{
483 const s32 *cell;
484 int len;
485
486 debug("%s: %s\n", __func__, prop_name);
487 cell = fdt_getprop(blob, node, prop_name, &len);
488 return cell != NULL;
489}
Simon Glassed3ee5c2012-02-27 10:52:36 +0000490
491/**
492 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
493 * terminating item.
494 *
495 * @param blob FDT blob to use
496 * @param node Node to look at
497 * @param prop_name Node property name
498 * @param gpio Array of gpio elements to fill from FDT. This will be
499 * untouched if either 0 or an error is returned
500 * @param max_count Maximum number of elements allowed
501 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
502 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
503 */
Abhilash Kesavan5921f6a2012-10-25 16:31:01 +0000504int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
505 struct fdt_gpio_state *gpio, int max_count)
Simon Glassed3ee5c2012-02-27 10:52:36 +0000506{
507 const struct fdt_property *prop;
508 const u32 *cell;
509 const char *name;
510 int len, i;
511
512 debug("%s: %s\n", __func__, prop_name);
513 assert(max_count > 0);
514 prop = fdt_get_property(blob, node, prop_name, &len);
515 if (!prop) {
Simon Glass1cb23232012-07-12 05:25:01 +0000516 debug("%s: property '%s' missing\n", __func__, prop_name);
Simon Glassed3ee5c2012-02-27 10:52:36 +0000517 return -FDT_ERR_NOTFOUND;
518 }
519
520 /* We will use the name to tag the GPIO */
521 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
522 cell = (u32 *)prop->data;
523 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
524 if (len > max_count) {
Simon Glass1cb23232012-07-12 05:25:01 +0000525 debug(" %s: too many GPIOs / cells for "
Simon Glassed3ee5c2012-02-27 10:52:36 +0000526 "property '%s'\n", __func__, prop_name);
527 return -FDT_ERR_BADLAYOUT;
528 }
529
530 /* Read out the GPIO data from the cells */
531 for (i = 0; i < len; i++, cell += 3) {
532 gpio[i].gpio = fdt32_to_cpu(cell[1]);
533 gpio[i].flags = fdt32_to_cpu(cell[2]);
534 gpio[i].name = name;
535 }
536
537 return len;
538}
539
540int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
541 struct fdt_gpio_state *gpio)
542{
543 int err;
544
545 debug("%s: %s\n", __func__, prop_name);
546 gpio->gpio = FDT_GPIO_NONE;
547 gpio->name = NULL;
548 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
549 return err == 1 ? 0 : err;
550}
551
Sean Paul202ff752012-10-25 16:31:06 +0000552int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
553{
554 int val;
555
556 if (!fdt_gpio_isvalid(gpio))
557 return -1;
558
559 val = gpio_get_value(gpio->gpio);
560 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
561}
562
563int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
564{
565 if (!fdt_gpio_isvalid(gpio))
566 return -1;
567
568 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
569 return gpio_set_value(gpio->gpio, val);
570}
571
Simon Glassed3ee5c2012-02-27 10:52:36 +0000572int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
573{
574 /*
575 * Return success if there is no GPIO defined. This is used for
576 * optional GPIOs)
577 */
578 if (!fdt_gpio_isvalid(gpio))
579 return 0;
580
581 if (gpio_request(gpio->gpio, gpio->name))
582 return -1;
583 return 0;
584}
Anton Staffbed4d892012-04-17 09:01:28 +0000585
586int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
587 u8 *array, int count)
588{
589 const u8 *cell;
590 int err;
591
592 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
593 if (!err)
594 memcpy(array, cell, count);
595 return err;
596}
597
598const u8 *fdtdec_locate_byte_array(const void *blob, int node,
599 const char *prop_name, int count)
600{
601 const u8 *cell;
602 int err;
603
604 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
605 if (err)
606 return NULL;
607 return cell;
608}
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000609
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000610int fdtdec_get_config_int(const void *blob, const char *prop_name,
611 int default_val)
612{
613 int config_node;
614
615 debug("%s: %s\n", __func__, prop_name);
616 config_node = fdt_path_offset(blob, "/config");
617 if (config_node < 0)
618 return default_val;
619 return fdtdec_get_int(blob, config_node, prop_name, default_val);
620}
Simon Glass332ab0d2012-10-25 16:30:59 +0000621
Gabe Black79289c02012-10-25 16:31:04 +0000622int fdtdec_get_config_bool(const void *blob, const char *prop_name)
623{
624 int config_node;
625 const void *prop;
626
627 debug("%s: %s\n", __func__, prop_name);
628 config_node = fdt_path_offset(blob, "/config");
629 if (config_node < 0)
630 return 0;
631 prop = fdt_get_property(blob, config_node, prop_name, NULL);
632
633 return prop != NULL;
634}
635
Simon Glass332ab0d2012-10-25 16:30:59 +0000636char *fdtdec_get_config_string(const void *blob, const char *prop_name)
637{
638 const char *nodep;
639 int nodeoffset;
640 int len;
641
642 debug("%s: %s\n", __func__, prop_name);
643 nodeoffset = fdt_path_offset(blob, "/config");
644 if (nodeoffset < 0)
645 return NULL;
646
647 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
648 if (!nodep)
649 return NULL;
650
651 return (char *)nodep;
652}
Simon Glassf20c4612012-10-25 16:31:00 +0000653
654int fdtdec_decode_region(const void *blob, int node,
655 const char *prop_name, void **ptrp, size_t *size)
656{
657 const fdt_addr_t *cell;
658 int len;
659
660 debug("%s: %s\n", __func__, prop_name);
661 cell = fdt_getprop(blob, node, prop_name, &len);
662 if (!cell || (len != sizeof(fdt_addr_t) * 2))
663 return -1;
664
Simon Glass370b6c52013-11-10 10:26:54 -0700665 *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size);
Simon Glassf20c4612012-10-25 16:31:00 +0000666 *size = fdt_size_to_cpu(cell[1]);
667 debug("%s: size=%zx\n", __func__, *size);
668 return 0;
669}
Simon Glass006e73b2014-02-27 13:26:01 -0700670
671/**
672 * Read a flash entry from the fdt
673 *
674 * @param blob FDT blob
675 * @param node Offset of node to read
676 * @param name Name of node being read
677 * @param entry Place to put offset and size of this node
678 * @return 0 if ok, -ve on error
679 */
680int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
681 struct fmap_entry *entry)
682{
683 u32 reg[2];
684
685 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
686 debug("Node '%s' has bad/missing 'reg' property\n", name);
687 return -FDT_ERR_NOTFOUND;
688 }
689 entry->offset = reg[0];
690 entry->length = reg[1];
691
692 return 0;
693}
Heiko Schocher29a23f92014-03-03 12:19:30 +0100694#endif