blob: 1fecab3fbc3090717db105c5e7415fd235327ab4 [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
6#include <common.h>
7#include <serial.h>
8#include <libfdt.h>
9#include <fdtdec.h>
10
Michal Simeke46431e2012-07-11 02:26:38 +000011#include <asm/gpio.h>
Simon Glassed3ee5c2012-02-27 10:52:36 +000012
Simon Glassb5220bc2011-10-24 19:15:32 +000013DECLARE_GLOBAL_DATA_PTR;
14
15/*
16 * Here are the type we know about. One day we might allow drivers to
17 * register. For now we just put them here. The COMPAT macro allows us to
18 * turn this into a sparse list later, and keeps the ID with the name.
19 */
20#define COMPAT(id, name) name
21static const char * const compat_names[COMPAT_COUNT] = {
Simon Glassf88fe2d2012-02-27 10:52:34 +000022 COMPAT(UNKNOWN, "<none>"),
Simon Glass87f938c2012-02-27 10:52:49 +000023 COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
Jim Lin7e44d932013-06-21 19:05:47 +080024 COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
25 COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
Tom Warrene32624e2013-02-08 07:25:30 +000026 COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
Yen Lin96a78ac2012-03-06 19:00:23 +000027 COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
28 COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
Jimmy Zhang0e35ad02012-04-02 13:18:52 +000029 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
30 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
Rakesh Iyer6642a682012-04-17 09:01:35 +000031 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
Jim Lin312693c2012-07-29 20:53:29 +000032 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
Simon Glasse1ae0d12012-10-17 13:24:49 +000033 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
Wei Ni87540de2012-10-17 13:24:50 +000034 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
Stephen Warrena73ca472014-01-24 12:46:06 -070035 COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
Tom Warrenf4e4e0b2013-03-04 14:07:18 -070036 COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
Tom Warrenc9aa8312013-02-21 12:31:30 +000037 COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
Allen Martin8f1b46b2013-01-29 13:51:24 +000038 COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
Allen Martinb19f5742013-01-29 13:51:28 +000039 COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
Allen Martinc3bb3c82013-03-16 18:58:09 +000040 COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
Hatim RVcc9fe332012-12-11 00:52:46 +000041 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
42 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
Rajeshwari Shindec34253d2012-12-26 20:03:10 +000043 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
Rajeshwari Shinde72dbff12012-12-26 20:03:16 +000044 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
45 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
Rajeshwari Shinde5d506592012-12-26 20:03:20 +000046 COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
Hung-ying Tyan88364382013-05-15 18:27:28 +080047 COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
Hung-ying Tyan713cb682013-05-15 18:27:32 +080048 COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
Rajeshwari Shinde6abd1622013-01-07 23:35:05 +000049 COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053050 COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"),
Rajeshwari Shinde6abd1622013-01-07 23:35:05 +000051 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053052 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
Akshay Saraswat618766c2013-02-25 01:13:01 +000053 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
Ajay Kumard7377b52013-02-21 23:53:00 +000054 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
Ajay Kumar1e4706a2013-02-21 23:53:05 +000055 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
Amar45a4d4d2013-04-27 11:42:52 +053056 COMPAT(SAMSUNG_EXYNOS5_DWMMC, "samsung,exynos5250-dwmmc"),
Rajeshwari Shindeee1e3c22013-06-24 16:47:20 +053057 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
Rajeshwari Shindecd577e22013-01-08 21:03:38 +000058 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
Simon Glassbb8215f2013-03-11 06:08:08 +000059 COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
Rajeshwari Shinde7772bb72013-02-14 19:46:15 +000060 COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
Rong Changf6267992013-04-12 10:44:57 +000061 COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
Vincent Palatinec34fa52013-04-12 11:04:36 +000062 COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"),
naveen krishna chatradhiecbd7e12013-04-29 15:58:52 -070063 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
Simon Glassb5220bc2011-10-24 19:15:32 +000064};
65
Simon Glassa53f4a22012-01-17 08:20:50 +000066const char *fdtdec_get_compatible(enum fdt_compat_id id)
67{
68 /* We allow reading of the 'unknown' ID for testing purposes */
69 assert(id >= 0 && id < COMPAT_COUNT);
70 return compat_names[id];
71}
72
Simon Glass4397a2a2013-03-19 04:58:51 +000073fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
74 const char *prop_name, fdt_size_t *sizep)
Simon Glassb5220bc2011-10-24 19:15:32 +000075{
76 const fdt_addr_t *cell;
77 int len;
78
Simon Glass1cb23232012-07-12 05:25:01 +000079 debug("%s: %s: ", __func__, prop_name);
Simon Glassb5220bc2011-10-24 19:15:32 +000080 cell = fdt_getprop(blob, node, prop_name, &len);
Simon Glass4397a2a2013-03-19 04:58:51 +000081 if (cell && ((!sizep && len == sizeof(fdt_addr_t)) ||
82 len == sizeof(fdt_addr_t) * 2)) {
Simon Glass1cb23232012-07-12 05:25:01 +000083 fdt_addr_t addr = fdt_addr_to_cpu(*cell);
Simon Glass4397a2a2013-03-19 04:58:51 +000084 if (sizep) {
85 const fdt_size_t *size;
Simon Glass1cb23232012-07-12 05:25:01 +000086
Simon Glass4397a2a2013-03-19 04:58:51 +000087 size = (fdt_size_t *)((char *)cell +
88 sizeof(fdt_addr_t));
89 *sizep = fdt_size_to_cpu(*size);
Simon Glass370b6c52013-11-10 10:26:54 -070090 debug("addr=%08lx, size=%08x\n",
91 (ulong)addr, *sizep);
Simon Glass4397a2a2013-03-19 04:58:51 +000092 } else {
Simon Glass370b6c52013-11-10 10:26:54 -070093 debug("%08lx\n", (ulong)addr);
Simon Glass4397a2a2013-03-19 04:58:51 +000094 }
Simon Glass1cb23232012-07-12 05:25:01 +000095 return addr;
96 }
97 debug("(not found)\n");
Simon Glassb5220bc2011-10-24 19:15:32 +000098 return FDT_ADDR_T_NONE;
99}
100
Simon Glass4397a2a2013-03-19 04:58:51 +0000101fdt_addr_t fdtdec_get_addr(const void *blob, int node,
102 const char *prop_name)
103{
104 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
105}
106
Simon Glassb5220bc2011-10-24 19:15:32 +0000107s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
108 s32 default_val)
109{
110 const s32 *cell;
111 int len;
112
Simon Glass1cb23232012-07-12 05:25:01 +0000113 debug("%s: %s: ", __func__, prop_name);
Simon Glassb5220bc2011-10-24 19:15:32 +0000114 cell = fdt_getprop(blob, node, prop_name, &len);
Simon Glass1cb23232012-07-12 05:25:01 +0000115 if (cell && len >= sizeof(s32)) {
116 s32 val = fdt32_to_cpu(cell[0]);
117
118 debug("%#x (%d)\n", val, val);
119 return val;
120 }
121 debug("(not found)\n");
Simon Glassb5220bc2011-10-24 19:15:32 +0000122 return default_val;
123}
124
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000125uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
126 uint64_t default_val)
127{
128 const uint64_t *cell64;
129 int length;
130
131 cell64 = fdt_getprop(blob, node, prop_name, &length);
132 if (!cell64 || length < sizeof(*cell64))
133 return default_val;
134
135 return fdt64_to_cpu(*cell64);
136}
137
Simon Glassf88fe2d2012-02-27 10:52:34 +0000138int fdtdec_get_is_enabled(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000139{
140 const char *cell;
141
Simon Glassf88fe2d2012-02-27 10:52:34 +0000142 /*
143 * It should say "okay", so only allow that. Some fdts use "ok" but
144 * this is a bug. Please fix your device tree source file. See here
145 * for discussion:
146 *
147 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
148 */
Simon Glassb5220bc2011-10-24 19:15:32 +0000149 cell = fdt_getprop(blob, node, "status", NULL);
150 if (cell)
Simon Glassf88fe2d2012-02-27 10:52:34 +0000151 return 0 == strcmp(cell, "okay");
152 return 1;
Simon Glassb5220bc2011-10-24 19:15:32 +0000153}
154
Gerald Van Baren7cde3972012-11-12 23:13:54 -0500155enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000156{
157 enum fdt_compat_id id;
158
159 /* Search our drivers */
160 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
161 if (0 == fdt_node_check_compatible(blob, node,
162 compat_names[id]))
163 return id;
164 return COMPAT_UNKNOWN;
165}
166
167int fdtdec_next_compatible(const void *blob, int node,
168 enum fdt_compat_id id)
169{
170 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
171}
172
Simon Glass3ddecfc2012-04-02 13:18:42 +0000173int fdtdec_next_compatible_subnode(const void *blob, int node,
174 enum fdt_compat_id id, int *depthp)
175{
176 do {
177 node = fdt_next_node(blob, node, depthp);
178 } while (*depthp > 1);
179
180 /* If this is a direct subnode, and compatible, return it */
181 if (*depthp == 1 && 0 == fdt_node_check_compatible(
182 blob, node, compat_names[id]))
183 return node;
184
185 return -FDT_ERR_NOTFOUND;
186}
187
Simon Glassb5220bc2011-10-24 19:15:32 +0000188int fdtdec_next_alias(const void *blob, const char *name,
189 enum fdt_compat_id id, int *upto)
190{
191#define MAX_STR_LEN 20
192 char str[MAX_STR_LEN + 20];
193 int node, err;
194
195 /* snprintf() is not available */
196 assert(strlen(name) < MAX_STR_LEN);
197 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
Simon Glass00878472012-10-31 14:02:42 +0000198 node = fdt_path_offset(blob, str);
Simon Glassb5220bc2011-10-24 19:15:32 +0000199 if (node < 0)
200 return node;
201 err = fdt_node_check_compatible(blob, node, compat_names[id]);
202 if (err < 0)
203 return err;
Simon Glassf88fe2d2012-02-27 10:52:34 +0000204 if (err)
205 return -FDT_ERR_NOTFOUND;
206 (*upto)++;
207 return node;
Simon Glassb5220bc2011-10-24 19:15:32 +0000208}
209
Simon Glassa53f4a22012-01-17 08:20:50 +0000210int fdtdec_find_aliases_for_id(const void *blob, const char *name,
211 enum fdt_compat_id id, int *node_list, int maxcount)
212{
Simon Glassc6782272012-02-03 15:13:53 +0000213 memset(node_list, '\0', sizeof(*node_list) * maxcount);
214
215 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
216}
217
218/* TODO: Can we tighten this code up a little? */
219int fdtdec_add_aliases_for_id(const void *blob, const char *name,
220 enum fdt_compat_id id, int *node_list, int maxcount)
221{
Simon Glassa53f4a22012-01-17 08:20:50 +0000222 int name_len = strlen(name);
223 int nodes[maxcount];
224 int num_found = 0;
225 int offset, node;
226 int alias_node;
227 int count;
228 int i, j;
229
230 /* find the alias node if present */
231 alias_node = fdt_path_offset(blob, "/aliases");
232
233 /*
234 * start with nothing, and we can assume that the root node can't
235 * match
236 */
237 memset(nodes, '\0', sizeof(nodes));
238
239 /* First find all the compatible nodes */
240 for (node = count = 0; node >= 0 && count < maxcount;) {
241 node = fdtdec_next_compatible(blob, node, id);
242 if (node >= 0)
243 nodes[count++] = node;
244 }
245 if (node >= 0)
246 debug("%s: warning: maxcount exceeded with alias '%s'\n",
247 __func__, name);
248
249 /* Now find all the aliases */
Simon Glassa53f4a22012-01-17 08:20:50 +0000250 for (offset = fdt_first_property_offset(blob, alias_node);
251 offset > 0;
252 offset = fdt_next_property_offset(blob, offset)) {
253 const struct fdt_property *prop;
254 const char *path;
255 int number;
256 int found;
257
258 node = 0;
259 prop = fdt_get_property_by_offset(blob, offset, NULL);
260 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
261 if (prop->len && 0 == strncmp(path, name, name_len))
262 node = fdt_path_offset(blob, prop->data);
263 if (node <= 0)
264 continue;
265
266 /* Get the alias number */
267 number = simple_strtoul(path + name_len, NULL, 10);
268 if (number < 0 || number >= maxcount) {
269 debug("%s: warning: alias '%s' is out of range\n",
270 __func__, path);
271 continue;
272 }
273
274 /* Make sure the node we found is actually in our list! */
275 found = -1;
276 for (j = 0; j < count; j++)
277 if (nodes[j] == node) {
278 found = j;
279 break;
280 }
281
282 if (found == -1) {
283 debug("%s: warning: alias '%s' points to a node "
284 "'%s' that is missing or is not compatible "
285 " with '%s'\n", __func__, path,
286 fdt_get_name(blob, node, NULL),
287 compat_names[id]);
288 continue;
289 }
290
291 /*
292 * Add this node to our list in the right place, and mark
293 * it as done.
294 */
295 if (fdtdec_get_is_enabled(blob, node)) {
Simon Glassc6782272012-02-03 15:13:53 +0000296 if (node_list[number]) {
297 debug("%s: warning: alias '%s' requires that "
298 "a node be placed in the list in a "
299 "position which is already filled by "
300 "node '%s'\n", __func__, path,
301 fdt_get_name(blob, node, NULL));
302 continue;
303 }
Simon Glassa53f4a22012-01-17 08:20:50 +0000304 node_list[number] = node;
305 if (number >= num_found)
306 num_found = number + 1;
307 }
Simon Glassc6782272012-02-03 15:13:53 +0000308 nodes[found] = 0;
Simon Glassa53f4a22012-01-17 08:20:50 +0000309 }
310
311 /* Add any nodes not mentioned by an alias */
312 for (i = j = 0; i < maxcount; i++) {
313 if (!node_list[i]) {
314 for (; j < maxcount; j++)
315 if (nodes[j] &&
316 fdtdec_get_is_enabled(blob, nodes[j]))
317 break;
318
319 /* Have we run out of nodes to add? */
320 if (j == maxcount)
321 break;
322
323 assert(!node_list[i]);
324 node_list[i] = nodes[j++];
325 if (i >= num_found)
326 num_found = i + 1;
327 }
328 }
329
330 return num_found;
331}
332
Simon Glass9a263e52012-03-28 10:08:24 +0000333int fdtdec_check_fdt(void)
334{
335 /*
336 * We must have an FDT, but we cannot panic() yet since the console
337 * is not ready. So for now, just assert(). Boards which need an early
338 * FDT (prior to console ready) will need to make their own
339 * arrangements and do their own checks.
340 */
341 assert(!fdtdec_prepare_fdt());
342 return 0;
343}
344
Simon Glassb5220bc2011-10-24 19:15:32 +0000345/*
346 * This function is a little odd in that it accesses global data. At some
347 * point if the architecture board.c files merge this will make more sense.
348 * Even now, it is common code.
349 */
Simon Glass9a263e52012-03-28 10:08:24 +0000350int fdtdec_prepare_fdt(void)
Simon Glassb5220bc2011-10-24 19:15:32 +0000351{
Simon Glassc309c2d2013-04-20 08:42:46 +0000352 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
353 fdt_check_header(gd->fdt_blob)) {
Simon Glass9a263e52012-03-28 10:08:24 +0000354 printf("No valid FDT found - please append one to U-Boot "
355 "binary, use u-boot-dtb.bin or define "
Simon Glassa733b062013-04-26 02:53:43 +0000356 "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
Simon Glass9a263e52012-03-28 10:08:24 +0000357 return -1;
358 }
Simon Glassb5220bc2011-10-24 19:15:32 +0000359 return 0;
360}
Simon Glassd17da652012-02-27 10:52:35 +0000361
362int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
363{
364 const u32 *phandle;
365 int lookup;
366
Simon Glass1cb23232012-07-12 05:25:01 +0000367 debug("%s: %s\n", __func__, prop_name);
Simon Glassd17da652012-02-27 10:52:35 +0000368 phandle = fdt_getprop(blob, node, prop_name, NULL);
369 if (!phandle)
370 return -FDT_ERR_NOTFOUND;
371
372 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
373 return lookup;
374}
375
376/**
377 * Look up a property in a node and check that it has a minimum length.
378 *
379 * @param blob FDT blob
380 * @param node node to examine
381 * @param prop_name name of property to find
382 * @param min_len minimum property length in bytes
383 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
384 found, or -FDT_ERR_BADLAYOUT if not enough data
385 * @return pointer to cell, which is only valid if err == 0
386 */
387static const void *get_prop_check_min_len(const void *blob, int node,
388 const char *prop_name, int min_len, int *err)
389{
390 const void *cell;
391 int len;
392
393 debug("%s: %s\n", __func__, prop_name);
394 cell = fdt_getprop(blob, node, prop_name, &len);
395 if (!cell)
396 *err = -FDT_ERR_NOTFOUND;
397 else if (len < min_len)
398 *err = -FDT_ERR_BADLAYOUT;
399 else
400 *err = 0;
401 return cell;
402}
403
404int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
405 u32 *array, int count)
406{
407 const u32 *cell;
408 int i, err = 0;
409
410 debug("%s: %s\n", __func__, prop_name);
411 cell = get_prop_check_min_len(blob, node, prop_name,
412 sizeof(u32) * count, &err);
413 if (!err) {
414 for (i = 0; i < count; i++)
415 array[i] = fdt32_to_cpu(cell[i]);
416 }
417 return err;
418}
419
Simon Glass96875e72012-04-02 13:18:41 +0000420const u32 *fdtdec_locate_array(const void *blob, int node,
421 const char *prop_name, int count)
422{
423 const u32 *cell;
424 int err;
425
426 cell = get_prop_check_min_len(blob, node, prop_name,
427 sizeof(u32) * count, &err);
428 return err ? NULL : cell;
429}
430
Simon Glassd17da652012-02-27 10:52:35 +0000431int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
432{
433 const s32 *cell;
434 int len;
435
436 debug("%s: %s\n", __func__, prop_name);
437 cell = fdt_getprop(blob, node, prop_name, &len);
438 return cell != NULL;
439}
Simon Glassed3ee5c2012-02-27 10:52:36 +0000440
441/**
442 * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
443 * terminating item.
444 *
445 * @param blob FDT blob to use
446 * @param node Node to look at
447 * @param prop_name Node property name
448 * @param gpio Array of gpio elements to fill from FDT. This will be
449 * untouched if either 0 or an error is returned
450 * @param max_count Maximum number of elements allowed
451 * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
452 * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
453 */
Abhilash Kesavan5921f6a2012-10-25 16:31:01 +0000454int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
455 struct fdt_gpio_state *gpio, int max_count)
Simon Glassed3ee5c2012-02-27 10:52:36 +0000456{
457 const struct fdt_property *prop;
458 const u32 *cell;
459 const char *name;
460 int len, i;
461
462 debug("%s: %s\n", __func__, prop_name);
463 assert(max_count > 0);
464 prop = fdt_get_property(blob, node, prop_name, &len);
465 if (!prop) {
Simon Glass1cb23232012-07-12 05:25:01 +0000466 debug("%s: property '%s' missing\n", __func__, prop_name);
Simon Glassed3ee5c2012-02-27 10:52:36 +0000467 return -FDT_ERR_NOTFOUND;
468 }
469
470 /* We will use the name to tag the GPIO */
471 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
472 cell = (u32 *)prop->data;
473 len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
474 if (len > max_count) {
Simon Glass1cb23232012-07-12 05:25:01 +0000475 debug(" %s: too many GPIOs / cells for "
Simon Glassed3ee5c2012-02-27 10:52:36 +0000476 "property '%s'\n", __func__, prop_name);
477 return -FDT_ERR_BADLAYOUT;
478 }
479
480 /* Read out the GPIO data from the cells */
481 for (i = 0; i < len; i++, cell += 3) {
482 gpio[i].gpio = fdt32_to_cpu(cell[1]);
483 gpio[i].flags = fdt32_to_cpu(cell[2]);
484 gpio[i].name = name;
485 }
486
487 return len;
488}
489
490int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
491 struct fdt_gpio_state *gpio)
492{
493 int err;
494
495 debug("%s: %s\n", __func__, prop_name);
496 gpio->gpio = FDT_GPIO_NONE;
497 gpio->name = NULL;
498 err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
499 return err == 1 ? 0 : err;
500}
501
Sean Paul202ff752012-10-25 16:31:06 +0000502int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
503{
504 int val;
505
506 if (!fdt_gpio_isvalid(gpio))
507 return -1;
508
509 val = gpio_get_value(gpio->gpio);
510 return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
511}
512
513int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
514{
515 if (!fdt_gpio_isvalid(gpio))
516 return -1;
517
518 val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
519 return gpio_set_value(gpio->gpio, val);
520}
521
Simon Glassed3ee5c2012-02-27 10:52:36 +0000522int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
523{
524 /*
525 * Return success if there is no GPIO defined. This is used for
526 * optional GPIOs)
527 */
528 if (!fdt_gpio_isvalid(gpio))
529 return 0;
530
531 if (gpio_request(gpio->gpio, gpio->name))
532 return -1;
533 return 0;
534}
Anton Staffbed4d892012-04-17 09:01:28 +0000535
536int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
537 u8 *array, int count)
538{
539 const u8 *cell;
540 int err;
541
542 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
543 if (!err)
544 memcpy(array, cell, count);
545 return err;
546}
547
548const u8 *fdtdec_locate_byte_array(const void *blob, int node,
549 const char *prop_name, int count)
550{
551 const u8 *cell;
552 int err;
553
554 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
555 if (err)
556 return NULL;
557 return cell;
558}
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000559
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000560int fdtdec_get_config_int(const void *blob, const char *prop_name,
561 int default_val)
562{
563 int config_node;
564
565 debug("%s: %s\n", __func__, prop_name);
566 config_node = fdt_path_offset(blob, "/config");
567 if (config_node < 0)
568 return default_val;
569 return fdtdec_get_int(blob, config_node, prop_name, default_val);
570}
Simon Glass332ab0d2012-10-25 16:30:59 +0000571
Gabe Black79289c02012-10-25 16:31:04 +0000572int fdtdec_get_config_bool(const void *blob, const char *prop_name)
573{
574 int config_node;
575 const void *prop;
576
577 debug("%s: %s\n", __func__, prop_name);
578 config_node = fdt_path_offset(blob, "/config");
579 if (config_node < 0)
580 return 0;
581 prop = fdt_get_property(blob, config_node, prop_name, NULL);
582
583 return prop != NULL;
584}
585
Simon Glass332ab0d2012-10-25 16:30:59 +0000586char *fdtdec_get_config_string(const void *blob, const char *prop_name)
587{
588 const char *nodep;
589 int nodeoffset;
590 int len;
591
592 debug("%s: %s\n", __func__, prop_name);
593 nodeoffset = fdt_path_offset(blob, "/config");
594 if (nodeoffset < 0)
595 return NULL;
596
597 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
598 if (!nodep)
599 return NULL;
600
601 return (char *)nodep;
602}
Simon Glassf20c4612012-10-25 16:31:00 +0000603
604int fdtdec_decode_region(const void *blob, int node,
605 const char *prop_name, void **ptrp, size_t *size)
606{
607 const fdt_addr_t *cell;
608 int len;
609
610 debug("%s: %s\n", __func__, prop_name);
611 cell = fdt_getprop(blob, node, prop_name, &len);
612 if (!cell || (len != sizeof(fdt_addr_t) * 2))
613 return -1;
614
Simon Glass370b6c52013-11-10 10:26:54 -0700615 *ptrp = map_sysmem(fdt_addr_to_cpu(*cell), *size);
Simon Glassf20c4612012-10-25 16:31:00 +0000616 *size = fdt_size_to_cpu(cell[1]);
617 debug("%s: size=%zx\n", __func__, *size);
618 return 0;
619}