blob: 1a863699348ebe55dd2fa9d7dfc0c0e5efb1184a [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 Glassb45122f2015-02-27 22:06:34 -070012#include <asm/sections.h>
Simon Glass5c33c9f2014-07-23 06:55:09 -060013#include <linux/ctype.h>
Simon Glassb5220bc2011-10-24 19:15:32 +000014
15DECLARE_GLOBAL_DATA_PTR;
16
17/*
18 * Here are the type we know about. One day we might allow drivers to
19 * register. For now we just put them here. The COMPAT macro allows us to
20 * turn this into a sparse list later, and keeps the ID with the name.
21 */
22#define COMPAT(id, name) name
23static const char * const compat_names[COMPAT_COUNT] = {
Simon Glassf88fe2d2012-02-27 10:52:34 +000024 COMPAT(UNKNOWN, "<none>"),
Jimmy Zhang0e35ad02012-04-02 13:18:52 +000025 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
26 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
Rakesh Iyer6642a682012-04-17 09:01:35 +000027 COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
Jim Lin312693c2012-07-29 20:53:29 +000028 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
Simon Glasse1ae0d12012-10-17 13:24:49 +000029 COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"),
Simon Glass00f37322015-04-14 21:03:40 -060030 COMPAT(NVIDIA_TEGRA124_DC, "nvidia,tegra124-dc"),
31 COMPAT(NVIDIA_TEGRA124_SOR, "nvidia,tegra124-sor"),
32 COMPAT(NVIDIA_TEGRA124_PMC, "nvidia,tegra124-pmc"),
Wei Ni87540de2012-10-17 13:24:50 +000033 COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"),
Tom Warren7aaa5a62015-03-04 16:36:00 -070034 COMPAT(NVIDIA_TEGRA210_SDMMC, "nvidia,tegra210-sdhci"),
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"),
Thierry Redingf3158282014-12-09 22:25:12 -070038 COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
39 COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
40 COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
Thierry Reding79c7a902014-12-09 22:25:09 -070041 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
Tom Warren7aaa5a62015-03-04 16:36:00 -070042 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
Hatim RVcc9fe332012-12-11 00:52:46 +000043 COMPAT(SMSC_LAN9215, "smsc,lan9215"),
44 COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
Rajeshwari Shindec34253d2012-12-26 20:03:10 +000045 COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
Rajeshwari Shinde72dbff12012-12-26 20:03:16 +000046 COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
47 COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
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_USB_PHY, "samsung,exynos-usb-phy"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053050 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
Akshay Saraswat618766c2013-02-25 01:13:01 +000051 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
Ajay Kumard7377b52013-02-21 23:53:00 +000052 COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"),
Piotr Wilczekde461c52014-03-07 14:59:39 +010053 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
Ajay Kumar1e4706a2013-02-21 23:53:05 +000054 COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"),
Jaehoon Chung7d3ca0f2014-05-16 13:59:51 +090055 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
Piotr Wilczek3577fe82014-03-07 14:59:41 +010056 COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
Rajeshwari Shindeee1e3c22013-06-24 16:47:20 +053057 COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"),
Przemyslaw Marczakf37df0f2015-04-20 20:07:45 +020058 COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),
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"),
naveen krishna chatradhiecbd7e12013-04-29 15:58:52 -070061 COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
Simon Glass7d95f2a2014-02-27 13:26:19 -070062 COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"),
Ajay Kumar45c480c2014-09-05 16:53:33 +053063 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
Simon Glass77f9b1f2014-11-12 22:42:21 -070064 COMPAT(INTEL_MICROCODE, "intel,microcode"),
Simon Glass65dd74a2014-11-12 22:42:28 -070065 COMPAT(MEMORY_SPD, "memory-spd"),
Simon Glass3ac83932014-11-14 18:18:38 -070066 COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"),
Simon Glassbb80be32014-11-24 21:18:16 -070067 COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
Simon Glasseffcf062014-11-14 20:56:36 -070068 COMPAT(INTEL_GMA, "intel,gma"),
Thierry Reding6173c452014-12-09 22:25:05 -070069 COMPAT(AMS_AS3722, "ams,as3722"),
Simon Glass5da38082015-01-19 22:16:06 -070070 COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
Bin Mengc89ada02015-02-05 23:42:26 +080071 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
Gabriel Huau5318f182015-05-25 22:27:37 -070072 COMPAT(INTEL_X86_PINCTRL, "intel,x86-pinctrl"),
Masahiro Yamada6462cde2015-03-11 15:54:46 +090073 COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
Simon Glass90b16d12015-03-26 09:29:29 -060074 COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
Bin Meng9c7dea62015-05-25 22:35:04 +080075 COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
Marek Vasut6ab00db2015-07-25 19:33:56 +020076 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
Marek Vasut129adf52015-07-25 10:48:14 +020077 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
Andrew Bradfordf3b84a32015-08-07 08:36:35 -040078 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
79 COMPAT(COMPAT_INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
Simon Glassb5220bc2011-10-24 19:15:32 +000080};
81
Simon Glassa53f4a22012-01-17 08:20:50 +000082const char *fdtdec_get_compatible(enum fdt_compat_id id)
83{
84 /* We allow reading of the 'unknown' ID for testing purposes */
85 assert(id >= 0 && id < COMPAT_COUNT);
86 return compat_names[id];
87}
88
Stephen Warren02464e32015-08-06 15:31:02 -060089fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
90 const char *prop_name, int index, int na, int ns,
91 fdt_size_t *sizep)
92{
93 const fdt32_t *prop, *prop_end;
94 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
95 int len;
96 fdt_addr_t addr;
97
98 debug("%s: %s: ", __func__, prop_name);
99
100 if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
101 debug("(na too large for fdt_addr_t type)\n");
102 return FDT_ADDR_T_NONE;
103 }
104
105 if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
106 debug("(ns too large for fdt_size_t type)\n");
107 return FDT_ADDR_T_NONE;
108 }
109
110 prop = fdt_getprop(blob, node, prop_name, &len);
111 if (!prop) {
112 debug("(not found)\n");
113 return FDT_ADDR_T_NONE;
114 }
115 prop_end = prop + (len / sizeof(*prop));
116
117 prop_addr = prop + (index * (na + ns));
118 prop_size = prop_addr + na;
119 prop_after_size = prop_size + ns;
120 if (prop_after_size > prop_end) {
121 debug("(not enough data: expected >= %d cells, got %d cells)\n",
122 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
123 return FDT_ADDR_T_NONE;
124 }
125
126 addr = fdtdec_get_number(prop_addr, na);
127
128 if (sizep) {
129 *sizep = fdtdec_get_number(prop_size, ns);
130 debug("addr=%08llx, size=%llx\n", (u64)addr, (u64)*sizep);
131 } else {
132 debug("addr=%08llx\n", (u64)addr);
133 }
134
135 return addr;
136}
137
138fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
139 int node, const char *prop_name, int index, fdt_size_t *sizep)
140{
141 int na, ns;
142
143 debug("%s: ", __func__);
144
145 na = fdt_address_cells(blob, parent);
146 if (na < 1) {
147 debug("(bad #address-cells)\n");
148 return FDT_ADDR_T_NONE;
149 }
150
151 ns = fdt_size_cells(blob, parent);
Przemyslaw Marczakff0a6352015-09-30 13:14:50 +0200152 if (ns < 0) {
Stephen Warren02464e32015-08-06 15:31:02 -0600153 debug("(bad #size-cells)\n");
154 return FDT_ADDR_T_NONE;
155 }
156
157 debug("na=%d, ns=%d, ", na, ns);
158
159 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
160 ns, sizep);
161}
162
163fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
164 const char *prop_name, int index, fdt_size_t *sizep)
165{
166 int parent;
167
168 debug("%s: ", __func__);
169
170 parent = fdt_parent_offset(blob, node);
171 if (parent < 0) {
172 debug("(no parent found)\n");
173 return FDT_ADDR_T_NONE;
174 }
175
176 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
177 index, sizep);
178}
179
Simon Glass4397a2a2013-03-19 04:58:51 +0000180fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
181 const char *prop_name, fdt_size_t *sizep)
Simon Glassb5220bc2011-10-24 19:15:32 +0000182{
Stephen Warrend93b9a02015-09-25 10:11:41 -0600183 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
184
Stephen Warren02464e32015-08-06 15:31:02 -0600185 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
186 sizeof(fdt_addr_t) / sizeof(fdt32_t),
Stephen Warrend93b9a02015-09-25 10:11:41 -0600187 ns, sizep);
Simon Glassb5220bc2011-10-24 19:15:32 +0000188}
189
Simon Glass4397a2a2013-03-19 04:58:51 +0000190fdt_addr_t fdtdec_get_addr(const void *blob, int node,
191 const char *prop_name)
192{
193 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
194}
195
Bin Menga62e84d2014-12-31 16:05:11 +0800196#ifdef CONFIG_PCI
197int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
198 const char *prop_name, struct fdt_pci_addr *addr)
199{
200 const u32 *cell;
201 int len;
202 int ret = -ENOENT;
203
204 debug("%s: %s: ", __func__, prop_name);
205
206 /*
207 * If we follow the pci bus bindings strictly, we should check
208 * the value of the node's parent node's #address-cells and
209 * #size-cells. They need to be 3 and 2 accordingly. However,
210 * for simplicity we skip the check here.
211 */
212 cell = fdt_getprop(blob, node, prop_name, &len);
213 if (!cell)
214 goto fail;
215
216 if ((len % FDT_PCI_REG_SIZE) == 0) {
217 int num = len / FDT_PCI_REG_SIZE;
218 int i;
219
220 for (i = 0; i < num; i++) {
221 debug("pci address #%d: %08lx %08lx %08lx\n", i,
222 (ulong)fdt_addr_to_cpu(cell[0]),
223 (ulong)fdt_addr_to_cpu(cell[1]),
224 (ulong)fdt_addr_to_cpu(cell[2]));
225 if ((fdt_addr_to_cpu(*cell) & type) == type) {
226 addr->phys_hi = fdt_addr_to_cpu(cell[0]);
227 addr->phys_mid = fdt_addr_to_cpu(cell[1]);
228 addr->phys_lo = fdt_addr_to_cpu(cell[2]);
229 break;
230 } else {
231 cell += (FDT_PCI_ADDR_CELLS +
232 FDT_PCI_SIZE_CELLS);
233 }
234 }
235
Simon Glass106cce92015-03-05 12:25:19 -0700236 if (i == num) {
237 ret = -ENXIO;
Bin Menga62e84d2014-12-31 16:05:11 +0800238 goto fail;
Simon Glass106cce92015-03-05 12:25:19 -0700239 }
Bin Menga62e84d2014-12-31 16:05:11 +0800240
241 return 0;
242 } else {
243 ret = -EINVAL;
244 }
245
246fail:
247 debug("(not found)\n");
248 return ret;
249}
250
251int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
252{
253 const char *list, *end;
254 int len;
255
256 list = fdt_getprop(blob, node, "compatible", &len);
257 if (!list)
258 return -ENOENT;
259
260 end = list + len;
261 while (list < end) {
262 char *s;
263
264 len = strlen(list);
265 if (len >= strlen("pciVVVV,DDDD")) {
266 s = strstr(list, "pci");
267
268 /*
269 * check if the string is something like pciVVVV,DDDD.RR
270 * or just pciVVVV,DDDD
271 */
272 if (s && s[7] == ',' &&
273 (s[12] == '.' || s[12] == 0)) {
274 s += 3;
275 *vendor = simple_strtol(s, NULL, 16);
276
277 s += 5;
278 *device = simple_strtol(s, NULL, 16);
279
280 return 0;
281 }
Bin Menga62e84d2014-12-31 16:05:11 +0800282 }
Bin Mengbc6351e2015-08-20 06:40:25 -0700283 list += (len + 1);
Bin Menga62e84d2014-12-31 16:05:11 +0800284 }
285
286 return -ENOENT;
287}
288
289int fdtdec_get_pci_bdf(const void *blob, int node,
290 struct fdt_pci_addr *addr, pci_dev_t *bdf)
291{
292 u16 dt_vendor, dt_device, vendor, device;
293 int ret;
294
295 /* get vendor id & device id from the compatible string */
296 ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
297 if (ret)
298 return ret;
299
300 /* extract the bdf from fdt_pci_addr */
301 *bdf = addr->phys_hi & 0xffff00;
302
303 /* read vendor id & device id based on bdf */
304 pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
305 pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
306
307 /*
308 * Note there are two places in the device tree to fully describe
309 * a pci device: one is via compatible string with a format of
310 * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
311 * the device node's reg address property. We read the vendor id
312 * and device id based on bdf and compare the values with the
313 * "VVVV,DDDD". If they are the same, then we are good to use bdf
314 * to read device's bar. But if they are different, we have to rely
315 * on the vendor id and device id extracted from the compatible
316 * string and locate the real bdf by pci_find_device(). This is
317 * because normally we may only know device's device number and
318 * function number when writing device tree. The bus number is
319 * dynamically assigned during the pci enumeration process.
320 */
321 if ((dt_vendor != vendor) || (dt_device != device)) {
322 *bdf = pci_find_device(dt_vendor, dt_device, 0);
323 if (*bdf == -1)
324 return -ENODEV;
325 }
326
327 return 0;
328}
329
330int fdtdec_get_pci_bar32(const void *blob, int node,
331 struct fdt_pci_addr *addr, u32 *bar)
332{
333 pci_dev_t bdf;
334 int barnum;
335 int ret;
336
337 /* get pci devices's bdf */
338 ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
339 if (ret)
340 return ret;
341
342 /* extract the bar number from fdt_pci_addr */
343 barnum = addr->phys_hi & 0xff;
344 if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
345 return -EINVAL;
346
347 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
348 *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
349
350 return 0;
351}
352#endif
353
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000354uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
355 uint64_t default_val)
356{
357 const uint64_t *cell64;
358 int length;
359
360 cell64 = fdt_getprop(blob, node, prop_name, &length);
361 if (!cell64 || length < sizeof(*cell64))
362 return default_val;
363
364 return fdt64_to_cpu(*cell64);
365}
366
Simon Glassf88fe2d2012-02-27 10:52:34 +0000367int fdtdec_get_is_enabled(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000368{
369 const char *cell;
370
Simon Glassf88fe2d2012-02-27 10:52:34 +0000371 /*
372 * It should say "okay", so only allow that. Some fdts use "ok" but
373 * this is a bug. Please fix your device tree source file. See here
374 * for discussion:
375 *
376 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
377 */
Simon Glassb5220bc2011-10-24 19:15:32 +0000378 cell = fdt_getprop(blob, node, "status", NULL);
379 if (cell)
Simon Glassf88fe2d2012-02-27 10:52:34 +0000380 return 0 == strcmp(cell, "okay");
381 return 1;
Simon Glassb5220bc2011-10-24 19:15:32 +0000382}
383
Gerald Van Baren7cde3972012-11-12 23:13:54 -0500384enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000385{
386 enum fdt_compat_id id;
387
388 /* Search our drivers */
389 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
390 if (0 == fdt_node_check_compatible(blob, node,
391 compat_names[id]))
392 return id;
393 return COMPAT_UNKNOWN;
394}
395
396int fdtdec_next_compatible(const void *blob, int node,
397 enum fdt_compat_id id)
398{
399 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
400}
401
Simon Glass3ddecfc2012-04-02 13:18:42 +0000402int fdtdec_next_compatible_subnode(const void *blob, int node,
403 enum fdt_compat_id id, int *depthp)
404{
405 do {
406 node = fdt_next_node(blob, node, depthp);
407 } while (*depthp > 1);
408
409 /* If this is a direct subnode, and compatible, return it */
410 if (*depthp == 1 && 0 == fdt_node_check_compatible(
411 blob, node, compat_names[id]))
412 return node;
413
414 return -FDT_ERR_NOTFOUND;
415}
416
Simon Glassb5220bc2011-10-24 19:15:32 +0000417int fdtdec_next_alias(const void *blob, const char *name,
418 enum fdt_compat_id id, int *upto)
419{
420#define MAX_STR_LEN 20
421 char str[MAX_STR_LEN + 20];
422 int node, err;
423
424 /* snprintf() is not available */
425 assert(strlen(name) < MAX_STR_LEN);
426 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
Simon Glass00878472012-10-31 14:02:42 +0000427 node = fdt_path_offset(blob, str);
Simon Glassb5220bc2011-10-24 19:15:32 +0000428 if (node < 0)
429 return node;
430 err = fdt_node_check_compatible(blob, node, compat_names[id]);
431 if (err < 0)
432 return err;
Simon Glassf88fe2d2012-02-27 10:52:34 +0000433 if (err)
434 return -FDT_ERR_NOTFOUND;
435 (*upto)++;
436 return node;
Simon Glassb5220bc2011-10-24 19:15:32 +0000437}
438
Simon Glassa53f4a22012-01-17 08:20:50 +0000439int fdtdec_find_aliases_for_id(const void *blob, const char *name,
440 enum fdt_compat_id id, int *node_list, int maxcount)
441{
Simon Glassc6782272012-02-03 15:13:53 +0000442 memset(node_list, '\0', sizeof(*node_list) * maxcount);
443
444 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
445}
446
447/* TODO: Can we tighten this code up a little? */
448int fdtdec_add_aliases_for_id(const void *blob, const char *name,
449 enum fdt_compat_id id, int *node_list, int maxcount)
450{
Simon Glassa53f4a22012-01-17 08:20:50 +0000451 int name_len = strlen(name);
452 int nodes[maxcount];
453 int num_found = 0;
454 int offset, node;
455 int alias_node;
456 int count;
457 int i, j;
458
459 /* find the alias node if present */
460 alias_node = fdt_path_offset(blob, "/aliases");
461
462 /*
463 * start with nothing, and we can assume that the root node can't
464 * match
465 */
466 memset(nodes, '\0', sizeof(nodes));
467
468 /* First find all the compatible nodes */
469 for (node = count = 0; node >= 0 && count < maxcount;) {
470 node = fdtdec_next_compatible(blob, node, id);
471 if (node >= 0)
472 nodes[count++] = node;
473 }
474 if (node >= 0)
475 debug("%s: warning: maxcount exceeded with alias '%s'\n",
476 __func__, name);
477
478 /* Now find all the aliases */
Simon Glassa53f4a22012-01-17 08:20:50 +0000479 for (offset = fdt_first_property_offset(blob, alias_node);
480 offset > 0;
481 offset = fdt_next_property_offset(blob, offset)) {
482 const struct fdt_property *prop;
483 const char *path;
484 int number;
485 int found;
486
487 node = 0;
488 prop = fdt_get_property_by_offset(blob, offset, NULL);
489 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
490 if (prop->len && 0 == strncmp(path, name, name_len))
491 node = fdt_path_offset(blob, prop->data);
492 if (node <= 0)
493 continue;
494
495 /* Get the alias number */
496 number = simple_strtoul(path + name_len, NULL, 10);
497 if (number < 0 || number >= maxcount) {
498 debug("%s: warning: alias '%s' is out of range\n",
499 __func__, path);
500 continue;
501 }
502
503 /* Make sure the node we found is actually in our list! */
504 found = -1;
505 for (j = 0; j < count; j++)
506 if (nodes[j] == node) {
507 found = j;
508 break;
509 }
510
511 if (found == -1) {
512 debug("%s: warning: alias '%s' points to a node "
513 "'%s' that is missing or is not compatible "
514 " with '%s'\n", __func__, path,
515 fdt_get_name(blob, node, NULL),
516 compat_names[id]);
517 continue;
518 }
519
520 /*
521 * Add this node to our list in the right place, and mark
522 * it as done.
523 */
524 if (fdtdec_get_is_enabled(blob, node)) {
Simon Glassc6782272012-02-03 15:13:53 +0000525 if (node_list[number]) {
526 debug("%s: warning: alias '%s' requires that "
527 "a node be placed in the list in a "
528 "position which is already filled by "
529 "node '%s'\n", __func__, path,
530 fdt_get_name(blob, node, NULL));
531 continue;
532 }
Simon Glassa53f4a22012-01-17 08:20:50 +0000533 node_list[number] = node;
534 if (number >= num_found)
535 num_found = number + 1;
536 }
Simon Glassc6782272012-02-03 15:13:53 +0000537 nodes[found] = 0;
Simon Glassa53f4a22012-01-17 08:20:50 +0000538 }
539
540 /* Add any nodes not mentioned by an alias */
541 for (i = j = 0; i < maxcount; i++) {
542 if (!node_list[i]) {
543 for (; j < maxcount; j++)
544 if (nodes[j] &&
545 fdtdec_get_is_enabled(blob, nodes[j]))
546 break;
547
548 /* Have we run out of nodes to add? */
549 if (j == maxcount)
550 break;
551
552 assert(!node_list[i]);
553 node_list[i] = nodes[j++];
554 if (i >= num_found)
555 num_found = i + 1;
556 }
557 }
558
559 return num_found;
560}
561
Simon Glass5c33c9f2014-07-23 06:55:09 -0600562int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
563 int *seqp)
564{
565 int base_len = strlen(base);
566 const char *find_name;
567 int find_namelen;
568 int prop_offset;
569 int aliases;
570
571 find_name = fdt_get_name(blob, offset, &find_namelen);
572 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
573
574 aliases = fdt_path_offset(blob, "/aliases");
575 for (prop_offset = fdt_first_property_offset(blob, aliases);
576 prop_offset > 0;
577 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
578 const char *prop;
579 const char *name;
580 const char *slash;
Simon Glassc4af6732015-06-23 15:39:08 -0600581 int len, val;
Simon Glass5c33c9f2014-07-23 06:55:09 -0600582
583 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
584 debug(" - %s, %s\n", name, prop);
585 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
586 strncmp(name, base, base_len))
587 continue;
588
589 slash = strrchr(prop, '/');
590 if (strcmp(slash + 1, find_name))
591 continue;
Simon Glassc4af6732015-06-23 15:39:08 -0600592 val = trailing_strtol(name);
593 if (val != -1) {
594 *seqp = val;
595 debug("Found seq %d\n", *seqp);
596 return 0;
Simon Glass5c33c9f2014-07-23 06:55:09 -0600597 }
598 }
599
600 debug("Not found\n");
601 return -ENOENT;
602}
603
Simon Glassaac07d42014-09-04 16:27:24 -0600604int fdtdec_get_chosen_node(const void *blob, const char *name)
605{
606 const char *prop;
607 int chosen_node;
608 int len;
609
610 if (!blob)
611 return -FDT_ERR_NOTFOUND;
612 chosen_node = fdt_path_offset(blob, "/chosen");
613 prop = fdt_getprop(blob, chosen_node, name, &len);
614 if (!prop)
615 return -FDT_ERR_NOTFOUND;
616 return fdt_path_offset(blob, prop);
617}
618
Simon Glass9a263e52012-03-28 10:08:24 +0000619int fdtdec_check_fdt(void)
620{
621 /*
622 * We must have an FDT, but we cannot panic() yet since the console
623 * is not ready. So for now, just assert(). Boards which need an early
624 * FDT (prior to console ready) will need to make their own
625 * arrangements and do their own checks.
626 */
627 assert(!fdtdec_prepare_fdt());
628 return 0;
629}
630
Simon Glassb5220bc2011-10-24 19:15:32 +0000631/*
632 * This function is a little odd in that it accesses global data. At some
633 * point if the architecture board.c files merge this will make more sense.
634 * Even now, it is common code.
635 */
Simon Glass9a263e52012-03-28 10:08:24 +0000636int fdtdec_prepare_fdt(void)
Simon Glassb5220bc2011-10-24 19:15:32 +0000637{
Simon Glassc309c2d2013-04-20 08:42:46 +0000638 if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
639 fdt_check_header(gd->fdt_blob)) {
Simon Glass66312372015-02-27 22:06:32 -0700640#ifdef CONFIG_SPL_BUILD
641 puts("Missing DTB\n");
642#else
643 puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
Simon Glasscb5f97f702015-06-23 15:39:09 -0600644# ifdef DEBUG
645 if (gd->fdt_blob) {
646 printf("fdt_blob=%p\n", gd->fdt_blob);
647 print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
648 32, 0);
649 }
650# endif
Simon Glass66312372015-02-27 22:06:32 -0700651#endif
Simon Glass9a263e52012-03-28 10:08:24 +0000652 return -1;
653 }
Simon Glassb5220bc2011-10-24 19:15:32 +0000654 return 0;
655}
Simon Glassd17da652012-02-27 10:52:35 +0000656
657int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
658{
659 const u32 *phandle;
660 int lookup;
661
Simon Glass1cb23232012-07-12 05:25:01 +0000662 debug("%s: %s\n", __func__, prop_name);
Simon Glassd17da652012-02-27 10:52:35 +0000663 phandle = fdt_getprop(blob, node, prop_name, NULL);
664 if (!phandle)
665 return -FDT_ERR_NOTFOUND;
666
667 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
668 return lookup;
669}
670
671/**
672 * Look up a property in a node and check that it has a minimum length.
673 *
674 * @param blob FDT blob
675 * @param node node to examine
676 * @param prop_name name of property to find
677 * @param min_len minimum property length in bytes
678 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
679 found, or -FDT_ERR_BADLAYOUT if not enough data
680 * @return pointer to cell, which is only valid if err == 0
681 */
682static const void *get_prop_check_min_len(const void *blob, int node,
683 const char *prop_name, int min_len, int *err)
684{
685 const void *cell;
686 int len;
687
688 debug("%s: %s\n", __func__, prop_name);
689 cell = fdt_getprop(blob, node, prop_name, &len);
690 if (!cell)
691 *err = -FDT_ERR_NOTFOUND;
692 else if (len < min_len)
693 *err = -FDT_ERR_BADLAYOUT;
694 else
695 *err = 0;
696 return cell;
697}
698
699int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
700 u32 *array, int count)
701{
702 const u32 *cell;
703 int i, err = 0;
704
705 debug("%s: %s\n", __func__, prop_name);
706 cell = get_prop_check_min_len(blob, node, prop_name,
707 sizeof(u32) * count, &err);
708 if (!err) {
709 for (i = 0; i < count; i++)
710 array[i] = fdt32_to_cpu(cell[i]);
711 }
712 return err;
713}
714
Simon Glassa9f04d42014-11-10 18:00:19 -0700715int fdtdec_get_int_array_count(const void *blob, int node,
716 const char *prop_name, u32 *array, int count)
717{
718 const u32 *cell;
719 int len, elems;
720 int i;
721
722 debug("%s: %s\n", __func__, prop_name);
723 cell = fdt_getprop(blob, node, prop_name, &len);
724 if (!cell)
725 return -FDT_ERR_NOTFOUND;
726 elems = len / sizeof(u32);
727 if (count > elems)
728 count = elems;
729 for (i = 0; i < count; i++)
730 array[i] = fdt32_to_cpu(cell[i]);
731
732 return count;
733}
734
Simon Glass96875e72012-04-02 13:18:41 +0000735const u32 *fdtdec_locate_array(const void *blob, int node,
736 const char *prop_name, int count)
737{
738 const u32 *cell;
739 int err;
740
741 cell = get_prop_check_min_len(blob, node, prop_name,
742 sizeof(u32) * count, &err);
743 return err ? NULL : cell;
744}
745
Simon Glassd17da652012-02-27 10:52:35 +0000746int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
747{
748 const s32 *cell;
749 int len;
750
751 debug("%s: %s\n", __func__, prop_name);
752 cell = fdt_getprop(blob, node, prop_name, &len);
753 return cell != NULL;
754}
Simon Glassed3ee5c2012-02-27 10:52:36 +0000755
Simon Glass57068a72015-01-05 20:05:26 -0700756int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
757 const char *list_name,
758 const char *cells_name,
759 int cell_count, int index,
760 struct fdtdec_phandle_args *out_args)
761{
762 const __be32 *list, *list_end;
763 int rc = 0, size, cur_index = 0;
764 uint32_t count = 0;
765 int node = -1;
766 int phandle;
767
768 /* Retrieve the phandle list property */
769 list = fdt_getprop(blob, src_node, list_name, &size);
770 if (!list)
771 return -ENOENT;
772 list_end = list + size / sizeof(*list);
773
774 /* Loop over the phandles until all the requested entry is found */
775 while (list < list_end) {
776 rc = -EINVAL;
777 count = 0;
778
779 /*
780 * If phandle is 0, then it is an empty entry with no
781 * arguments. Skip forward to the next entry.
782 */
783 phandle = be32_to_cpup(list++);
784 if (phandle) {
785 /*
786 * Find the provider node and parse the #*-cells
787 * property to determine the argument length.
788 *
789 * This is not needed if the cell count is hard-coded
790 * (i.e. cells_name not set, but cell_count is set),
791 * except when we're going to return the found node
792 * below.
793 */
794 if (cells_name || cur_index == index) {
795 node = fdt_node_offset_by_phandle(blob,
796 phandle);
797 if (!node) {
798 debug("%s: could not find phandle\n",
799 fdt_get_name(blob, src_node,
800 NULL));
801 goto err;
802 }
803 }
804
805 if (cells_name) {
806 count = fdtdec_get_int(blob, node, cells_name,
807 -1);
808 if (count == -1) {
809 debug("%s: could not get %s for %s\n",
810 fdt_get_name(blob, src_node,
811 NULL),
812 cells_name,
813 fdt_get_name(blob, node,
814 NULL));
815 goto err;
816 }
817 } else {
818 count = cell_count;
819 }
820
821 /*
822 * Make sure that the arguments actually fit in the
823 * remaining property data length
824 */
825 if (list + count > list_end) {
826 debug("%s: arguments longer than property\n",
827 fdt_get_name(blob, src_node, NULL));
828 goto err;
829 }
830 }
831
832 /*
833 * All of the error cases above bail out of the loop, so at
834 * this point, the parsing is successful. If the requested
835 * index matches, then fill the out_args structure and return,
836 * or return -ENOENT for an empty entry.
837 */
838 rc = -ENOENT;
839 if (cur_index == index) {
840 if (!phandle)
841 goto err;
842
843 if (out_args) {
844 int i;
845
846 if (count > MAX_PHANDLE_ARGS) {
847 debug("%s: too many arguments %d\n",
848 fdt_get_name(blob, src_node,
849 NULL), count);
850 count = MAX_PHANDLE_ARGS;
851 }
852 out_args->node = node;
853 out_args->args_count = count;
854 for (i = 0; i < count; i++) {
855 out_args->args[i] =
856 be32_to_cpup(list++);
857 }
858 }
859
860 /* Found it! return success */
861 return 0;
862 }
863
864 node = -1;
865 list += count;
866 cur_index++;
867 }
868
869 /*
870 * Result will be one of:
871 * -ENOENT : index is for empty phandle
872 * -EINVAL : parsing error on data
873 * [1..n] : Number of phandle (count mode; when index = -1)
874 */
875 rc = index < 0 ? cur_index : -ENOENT;
876 err:
877 return rc;
878}
879
Anton Staffbed4d892012-04-17 09:01:28 +0000880int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
881 u8 *array, int count)
882{
883 const u8 *cell;
884 int err;
885
886 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
887 if (!err)
888 memcpy(array, cell, count);
889 return err;
890}
891
892const u8 *fdtdec_locate_byte_array(const void *blob, int node,
893 const char *prop_name, int count)
894{
895 const u8 *cell;
896 int err;
897
898 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
899 if (err)
900 return NULL;
901 return cell;
902}
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000903
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000904int fdtdec_get_config_int(const void *blob, const char *prop_name,
905 int default_val)
906{
907 int config_node;
908
909 debug("%s: %s\n", __func__, prop_name);
910 config_node = fdt_path_offset(blob, "/config");
911 if (config_node < 0)
912 return default_val;
913 return fdtdec_get_int(blob, config_node, prop_name, default_val);
914}
Simon Glass332ab0d2012-10-25 16:30:59 +0000915
Gabe Black79289c02012-10-25 16:31:04 +0000916int fdtdec_get_config_bool(const void *blob, const char *prop_name)
917{
918 int config_node;
919 const void *prop;
920
921 debug("%s: %s\n", __func__, prop_name);
922 config_node = fdt_path_offset(blob, "/config");
923 if (config_node < 0)
924 return 0;
925 prop = fdt_get_property(blob, config_node, prop_name, NULL);
926
927 return prop != NULL;
928}
929
Simon Glass332ab0d2012-10-25 16:30:59 +0000930char *fdtdec_get_config_string(const void *blob, const char *prop_name)
931{
932 const char *nodep;
933 int nodeoffset;
934 int len;
935
936 debug("%s: %s\n", __func__, prop_name);
937 nodeoffset = fdt_path_offset(blob, "/config");
938 if (nodeoffset < 0)
939 return NULL;
940
941 nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
942 if (!nodep)
943 return NULL;
944
945 return (char *)nodep;
946}
Simon Glassf20c4612012-10-25 16:31:00 +0000947
Simon Glass76489832014-10-23 18:58:51 -0600948int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
949 fdt_addr_t *basep, fdt_size_t *sizep)
Simon Glassf20c4612012-10-25 16:31:00 +0000950{
951 const fdt_addr_t *cell;
952 int len;
953
Simon Glass76489832014-10-23 18:58:51 -0600954 debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
955 prop_name);
Simon Glassf20c4612012-10-25 16:31:00 +0000956 cell = fdt_getprop(blob, node, prop_name, &len);
Simon Glass76489832014-10-23 18:58:51 -0600957 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
958 debug("cell=%p, len=%d\n", cell, len);
Simon Glassf20c4612012-10-25 16:31:00 +0000959 return -1;
Simon Glass76489832014-10-23 18:58:51 -0600960 }
Simon Glassf20c4612012-10-25 16:31:00 +0000961
Simon Glass76489832014-10-23 18:58:51 -0600962 *basep = fdt_addr_to_cpu(*cell);
963 *sizep = fdt_size_to_cpu(cell[1]);
964 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
965 (ulong)*sizep);
966
Simon Glassf20c4612012-10-25 16:31:00 +0000967 return 0;
968}
Simon Glass006e73b2014-02-27 13:26:01 -0700969
970/**
971 * Read a flash entry from the fdt
972 *
973 * @param blob FDT blob
974 * @param node Offset of node to read
975 * @param name Name of node being read
976 * @param entry Place to put offset and size of this node
977 * @return 0 if ok, -ve on error
978 */
979int fdtdec_read_fmap_entry(const void *blob, int node, const char *name,
980 struct fmap_entry *entry)
981{
Simon Glassf3cc44f2014-10-23 18:58:52 -0600982 const char *prop;
Simon Glass006e73b2014-02-27 13:26:01 -0700983 u32 reg[2];
984
985 if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) {
986 debug("Node '%s' has bad/missing 'reg' property\n", name);
987 return -FDT_ERR_NOTFOUND;
988 }
989 entry->offset = reg[0];
990 entry->length = reg[1];
Simon Glassf3cc44f2014-10-23 18:58:52 -0600991 entry->used = fdtdec_get_int(blob, node, "used", entry->length);
992 prop = fdt_getprop(blob, node, "compress", NULL);
993 entry->compress_algo = prop && !strcmp(prop, "lzo") ?
994 FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE;
995 prop = fdt_getprop(blob, node, "hash", &entry->hash_size);
996 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
997 entry->hash = (uint8_t *)prop;
Simon Glass006e73b2014-02-27 13:26:01 -0700998
999 return 0;
1000}
Thierry Reding56f42242014-08-26 17:33:53 +02001001
Simon Glass5f7bfdd2015-03-05 12:25:14 -07001002u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
Thierry Reding56f42242014-08-26 17:33:53 +02001003{
1004 u64 number = 0;
1005
1006 while (cells--)
1007 number = (number << 32) | fdt32_to_cpu(*ptr++);
1008
1009 return number;
1010}
1011
1012int fdt_get_resource(const void *fdt, int node, const char *property,
1013 unsigned int index, struct fdt_resource *res)
1014{
1015 const fdt32_t *ptr, *end;
1016 int na, ns, len, parent;
1017 unsigned int i = 0;
1018
1019 parent = fdt_parent_offset(fdt, node);
1020 if (parent < 0)
1021 return parent;
1022
1023 na = fdt_address_cells(fdt, parent);
1024 ns = fdt_size_cells(fdt, parent);
1025
1026 ptr = fdt_getprop(fdt, node, property, &len);
1027 if (!ptr)
1028 return len;
1029
1030 end = ptr + len / sizeof(*ptr);
1031
1032 while (ptr + na + ns <= end) {
1033 if (i == index) {
1034 res->start = res->end = fdtdec_get_number(ptr, na);
1035 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
1036 return 0;
1037 }
1038
1039 ptr += na + ns;
1040 i++;
1041 }
1042
1043 return -FDT_ERR_NOTFOUND;
1044}
1045
1046int fdt_get_named_resource(const void *fdt, int node, const char *property,
1047 const char *prop_names, const char *name,
1048 struct fdt_resource *res)
1049{
1050 int index;
1051
1052 index = fdt_find_string(fdt, node, prop_names, name);
1053 if (index < 0)
1054 return index;
1055
1056 return fdt_get_resource(fdt, node, property, index, res);
1057}
Thierry Reding9f85eee2014-08-26 17:33:54 +02001058
Simon Glass26403872014-10-23 18:58:56 -06001059int fdtdec_decode_memory_region(const void *blob, int config_node,
1060 const char *mem_type, const char *suffix,
1061 fdt_addr_t *basep, fdt_size_t *sizep)
1062{
1063 char prop_name[50];
1064 const char *mem;
1065 fdt_size_t size, offset_size;
1066 fdt_addr_t base, offset;
1067 int node;
1068
1069 if (config_node == -1) {
1070 config_node = fdt_path_offset(blob, "/config");
1071 if (config_node < 0) {
1072 debug("%s: Cannot find /config node\n", __func__);
1073 return -ENOENT;
1074 }
1075 }
1076 if (!suffix)
1077 suffix = "";
1078
1079 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
1080 suffix);
1081 mem = fdt_getprop(blob, config_node, prop_name, NULL);
1082 if (!mem) {
1083 debug("%s: No memory type for '%s', using /memory\n", __func__,
1084 prop_name);
1085 mem = "/memory";
1086 }
1087
1088 node = fdt_path_offset(blob, mem);
1089 if (node < 0) {
1090 debug("%s: Failed to find node '%s': %s\n", __func__, mem,
1091 fdt_strerror(node));
1092 return -ENOENT;
1093 }
1094
1095 /*
1096 * Not strictly correct - the memory may have multiple banks. We just
1097 * use the first
1098 */
1099 if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
1100 debug("%s: Failed to decode memory region %s\n", __func__,
1101 mem);
1102 return -EINVAL;
1103 }
1104
1105 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
1106 suffix);
1107 if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
1108 &offset_size)) {
1109 debug("%s: Failed to decode memory region '%s'\n", __func__,
1110 prop_name);
1111 return -EINVAL;
1112 }
1113
1114 *basep = base + offset;
1115 *sizep = offset_size;
1116
1117 return 0;
1118}
Simon Glassb45122f2015-02-27 22:06:34 -07001119
Simon Glass12e67112015-04-14 21:03:21 -06001120static int decode_timing_property(const void *blob, int node, const char *name,
1121 struct timing_entry *result)
1122{
1123 int length, ret = 0;
1124 const u32 *prop;
1125
1126 prop = fdt_getprop(blob, node, name, &length);
1127 if (!prop) {
1128 debug("%s: could not find property %s\n",
1129 fdt_get_name(blob, node, NULL), name);
1130 return length;
1131 }
1132
1133 if (length == sizeof(u32)) {
1134 result->typ = fdtdec_get_int(blob, node, name, 0);
1135 result->min = result->typ;
1136 result->max = result->typ;
1137 } else {
1138 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
1139 }
1140
1141 return ret;
1142}
1143
1144int fdtdec_decode_display_timing(const void *blob, int parent, int index,
1145 struct display_timing *dt)
1146{
1147 int i, node, timings_node;
1148 u32 val = 0;
1149 int ret = 0;
1150
1151 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
1152 if (timings_node < 0)
1153 return timings_node;
1154
1155 for (i = 0, node = fdt_first_subnode(blob, timings_node);
1156 node > 0 && i != index;
1157 node = fdt_next_subnode(blob, node))
1158 i++;
1159
1160 if (node < 0)
1161 return node;
1162
1163 memset(dt, 0, sizeof(*dt));
1164
1165 ret |= decode_timing_property(blob, node, "hback-porch",
1166 &dt->hback_porch);
1167 ret |= decode_timing_property(blob, node, "hfront-porch",
1168 &dt->hfront_porch);
1169 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1170 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1171 ret |= decode_timing_property(blob, node, "vback-porch",
1172 &dt->vback_porch);
1173 ret |= decode_timing_property(blob, node, "vfront-porch",
1174 &dt->vfront_porch);
1175 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1176 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1177 ret |= decode_timing_property(blob, node, "clock-frequency",
1178 &dt->pixelclock);
1179
1180 dt->flags = 0;
1181 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1182 if (val != -1) {
1183 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1184 DISPLAY_FLAGS_VSYNC_LOW;
1185 }
1186 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1187 if (val != -1) {
1188 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1189 DISPLAY_FLAGS_HSYNC_LOW;
1190 }
1191 val = fdtdec_get_int(blob, node, "de-active", -1);
1192 if (val != -1) {
1193 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1194 DISPLAY_FLAGS_DE_LOW;
1195 }
1196 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1197 if (val != -1) {
1198 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1199 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1200 }
1201
1202 if (fdtdec_get_bool(blob, node, "interlaced"))
1203 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1204 if (fdtdec_get_bool(blob, node, "doublescan"))
1205 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1206 if (fdtdec_get_bool(blob, node, "doubleclk"))
1207 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1208
1209 return 0;
1210}
1211
Simon Glass08793612015-02-27 22:06:35 -07001212int fdtdec_setup(void)
Simon Glassb45122f2015-02-27 22:06:34 -07001213{
Masahiro Yamada0f925822015-08-12 07:31:55 +09001214#if CONFIG_IS_ENABLED(OF_CONTROL)
Simon Glassb45122f2015-02-27 22:06:34 -07001215# ifdef CONFIG_OF_EMBED
1216 /* Get a pointer to the FDT */
1217 gd->fdt_blob = __dtb_dt_begin;
1218# elif defined CONFIG_OF_SEPARATE
1219# ifdef CONFIG_SPL_BUILD
1220 /* FDT is at end of BSS */
1221 gd->fdt_blob = (ulong *)&__bss_end;
1222# else
1223 /* FDT is at end of image */
1224 gd->fdt_blob = (ulong *)&_end;
Masahiro Yamada3bd926c2015-08-01 16:03:25 +09001225# endif
Simon Glassb45122f2015-02-27 22:06:34 -07001226# elif defined(CONFIG_OF_HOSTFILE)
1227 if (sandbox_read_fdt_from_file()) {
1228 puts("Failed to read control FDT\n");
1229 return -1;
1230 }
1231# endif
1232# ifndef CONFIG_SPL_BUILD
1233 /* Allow the early environment to override the fdt address */
1234 gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
1235 (uintptr_t)gd->fdt_blob);
1236# endif
1237#endif
Simon Glass08793612015-02-27 22:06:35 -07001238 return fdtdec_prepare_fdt();
Simon Glassb45122f2015-02-27 22:06:34 -07001239}
1240
1241#endif /* !USE_HOSTCC */