blob: b2c59ab3818b3235e36b61b054c76a803423de63 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Simon Glassb5220bc2011-10-24 19:15:32 +00002/*
3 * Copyright (c) 2011 The Chromium OS Authors.
Simon Glassf43fc162023-04-25 10:27:21 -06004 *
5 * NOTE: Please do not add new devicetree-reading functionality into this file.
6 * Add it to the ofnode API instead, since that is compatible with livetree.
Simon Glassb5220bc2011-10-24 19:15:32 +00007 */
8
Heiko Schocher29a23f92014-03-03 12:19:30 +01009#ifndef USE_HOSTCC
Simon Glass70fe2382024-01-03 18:49:19 -070010
11#define LOG_CATEGORY LOGC_DT
12
13#include <bloblist.h>
Jean-Jacques Hiblot035d6402017-09-15 12:57:31 +020014#include <boot_fit.h>
Simon Glass4e4bf942022-07-31 12:28:48 -060015#include <display_options.h>
Simon Glassfcc0a872015-11-29 13:17:54 -070016#include <dm.h>
Simon Glassdb41d652019-12-28 10:45:07 -070017#include <hang.h>
Simon Glass9b4a2052019-12-28 10:45:05 -070018#include <init.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060019#include <log.h>
Simon Glass336d4612020-02-03 07:36:16 -070020#include <malloc.h>
Simon Glass90526e92020-05-10 11:39:56 -060021#include <net.h>
Simon Glassb62d3492022-12-21 16:08:19 -070022#include <spl.h>
Simon Glass9eef56d2019-08-01 09:46:48 -060023#include <env.h>
Jean-Jacques Hiblot035d6402017-09-15 12:57:31 +020024#include <errno.h>
25#include <fdtdec.h>
26#include <fdt_support.h>
Simon Glass0c670fc2019-08-01 09:46:36 -060027#include <gzip.h>
Heinrich Schuchardtf980c992018-11-18 17:58:50 +010028#include <mapmem.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090029#include <linux/libfdt.h>
Jean-Jacques Hiblot035d6402017-09-15 12:57:31 +020030#include <serial.h>
Simon Glass401d1c42020-10-30 21:38:53 -060031#include <asm/global_data.h>
Jean-Jacques Hiblot035d6402017-09-15 12:57:31 +020032#include <asm/sections.h>
Simon Glassee88ba72022-09-06 20:27:19 -060033#include <dm/ofnode.h>
34#include <dm/of_extra.h>
Simon Glass5c33c9f2014-07-23 06:55:09 -060035#include <linux/ctype.h>
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +020036#include <linux/lzo.h>
Michal Simekc2f09502020-07-10 13:34:44 +020037#include <linux/ioport.h>
Simon Glassb5220bc2011-10-24 19:15:32 +000038
39DECLARE_GLOBAL_DATA_PTR;
40
41/*
42 * Here are the type we know about. One day we might allow drivers to
43 * register. For now we just put them here. The COMPAT macro allows us to
44 * turn this into a sparse list later, and keeps the ID with the name.
Simon Glass01a227d2016-06-19 17:33:13 -060045 *
46 * NOTE: This list is basically a TODO list for things that need to be
47 * converted to driver model. So don't add new things here unless there is a
48 * good reason why driver-model conversion is infeasible. Examples include
49 * things which are used before driver model is available.
Simon Glassb5220bc2011-10-24 19:15:32 +000050 */
51#define COMPAT(id, name) name
52static const char * const compat_names[COMPAT_COUNT] = {
Simon Glassf88fe2d2012-02-27 10:52:34 +000053 COMPAT(UNKNOWN, "<none>"),
Jimmy Zhang0e35ad02012-04-02 13:18:52 +000054 COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
55 COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
Jim Lin312693c2012-07-29 20:53:29 +000056 COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
Thierry Reding79c7a902014-12-09 22:25:09 -070057 COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
Tom Warren7aaa5a62015-03-04 16:36:00 -070058 COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
Rajeshwari Shinde6abd1622013-01-07 23:35:05 +000059 COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
Vivek Gautam108b85b2013-09-14 14:02:48 +053060 COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
Akshay Saraswat618766c2013-02-25 01:13:01 +000061 COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
Piotr Wilczekde461c52014-03-07 14:59:39 +010062 COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
Jaehoon Chung7d3ca0f2014-05-16 13:59:51 +090063 COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
Neil Armstrong51e4e3e2019-02-10 10:16:21 +000064 COMPAT(GENERIC_SPI_FLASH, "jedec,spi-nor"),
Ajay Kumar45c480c2014-09-05 16:53:33 +053065 COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
Simon Glass77f9b1f2014-11-12 22:42:21 -070066 COMPAT(INTEL_MICROCODE, "intel,microcode"),
Bin Mengc89ada02015-02-05 23:42:26 +080067 COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
Marek Vasut6ab00db2015-07-25 19:33:56 +020068 COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
Marek Vasut129adf52015-07-25 10:48:14 +020069 COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
Marek Vasutef4b01b2015-12-05 19:28:44 +010070 COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
Simon Glass39ea0ee2016-06-19 17:33:14 -060071 COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
72 COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
73 COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
Ley Foon Tane11b5e82017-04-05 17:32:47 +080074 COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
75 COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
76 COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
77 COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
78 COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
79 COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
80 COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
81 COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
Tien Fong Cheeeb57c0b2017-09-25 16:40:03 +080082 COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
83 COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
Marek Vasut19c8fc72018-05-12 11:56:10 +020084 COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
Simon Glassb5220bc2011-10-24 19:15:32 +000085};
86
Simon Glassff66e7b2021-12-16 20:59:34 -070087static const char *const fdt_src_name[] = {
88 [FDTSRC_SEPARATE] = "separate",
89 [FDTSRC_FIT] = "fit",
90 [FDTSRC_BOARD] = "board",
91 [FDTSRC_EMBED] = "embed",
92 [FDTSRC_ENV] = "env",
Simon Glass70fe2382024-01-03 18:49:19 -070093 [FDTSRC_BLOBLIST] = "bloblist",
Simon Glassff66e7b2021-12-16 20:59:34 -070094};
95
96const char *fdtdec_get_srcname(void)
97{
98 return fdt_src_name[gd->fdt_src];
99}
100
Simon Glassa53f4a22012-01-17 08:20:50 +0000101const char *fdtdec_get_compatible(enum fdt_compat_id id)
102{
103 /* We allow reading of the 'unknown' ID for testing purposes */
104 assert(id >= 0 && id < COMPAT_COUNT);
105 return compat_names[id];
106}
107
Stephen Warren02464e32015-08-06 15:31:02 -0600108fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100109 const char *prop_name, int index, int na,
110 int ns, fdt_size_t *sizep,
111 bool translate)
Stephen Warren02464e32015-08-06 15:31:02 -0600112{
113 const fdt32_t *prop, *prop_end;
114 const fdt32_t *prop_addr, *prop_size, *prop_after_size;
115 int len;
116 fdt_addr_t addr;
117
118 debug("%s: %s: ", __func__, prop_name);
119
Stephen Warren02464e32015-08-06 15:31:02 -0600120 prop = fdt_getprop(blob, node, prop_name, &len);
121 if (!prop) {
122 debug("(not found)\n");
123 return FDT_ADDR_T_NONE;
124 }
125 prop_end = prop + (len / sizeof(*prop));
126
127 prop_addr = prop + (index * (na + ns));
128 prop_size = prop_addr + na;
129 prop_after_size = prop_size + ns;
130 if (prop_after_size > prop_end) {
131 debug("(not enough data: expected >= %d cells, got %d cells)\n",
132 (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
133 return FDT_ADDR_T_NONE;
134 }
135
Vignesh R5efa1bf2017-03-20 10:04:38 +0530136#if CONFIG_IS_ENABLED(OF_TRANSLATE)
Stephen Warren6e06acb2016-08-05 09:47:51 -0600137 if (translate)
138 addr = fdt_translate_address(blob, node, prop_addr);
139 else
140#endif
141 addr = fdtdec_get_number(prop_addr, na);
Stephen Warren02464e32015-08-06 15:31:02 -0600142
143 if (sizep) {
144 *sizep = fdtdec_get_number(prop_size, ns);
Simon Glassfd30d2c2016-02-29 15:25:37 -0700145 debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
146 (unsigned long long)*sizep);
Stephen Warren02464e32015-08-06 15:31:02 -0600147 } else {
Simon Glassfd30d2c2016-02-29 15:25:37 -0700148 debug("addr=%08llx\n", (unsigned long long)addr);
Stephen Warren02464e32015-08-06 15:31:02 -0600149 }
150
151 return addr;
152}
153
154fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
Mario Six2e386622018-01-15 11:07:35 +0100155 int node, const char *prop_name,
156 int index, fdt_size_t *sizep,
157 bool translate)
Stephen Warren02464e32015-08-06 15:31:02 -0600158{
159 int na, ns;
160
161 debug("%s: ", __func__);
162
163 na = fdt_address_cells(blob, parent);
164 if (na < 1) {
165 debug("(bad #address-cells)\n");
166 return FDT_ADDR_T_NONE;
167 }
168
169 ns = fdt_size_cells(blob, parent);
Przemyslaw Marczakff0a6352015-09-30 13:14:50 +0200170 if (ns < 0) {
Stephen Warren02464e32015-08-06 15:31:02 -0600171 debug("(bad #size-cells)\n");
172 return FDT_ADDR_T_NONE;
173 }
174
175 debug("na=%d, ns=%d, ", na, ns);
176
177 return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
Stephen Warren6e06acb2016-08-05 09:47:51 -0600178 ns, sizep, translate);
Stephen Warren02464e32015-08-06 15:31:02 -0600179}
180
181fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100182 const char *prop_name, int index,
183 fdt_size_t *sizep,
184 bool translate)
Stephen Warren02464e32015-08-06 15:31:02 -0600185{
186 int parent;
187
188 debug("%s: ", __func__);
189
190 parent = fdt_parent_offset(blob, node);
191 if (parent < 0) {
192 debug("(no parent found)\n");
193 return FDT_ADDR_T_NONE;
194 }
195
196 return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
Stephen Warren6e06acb2016-08-05 09:47:51 -0600197 index, sizep, translate);
Stephen Warren02464e32015-08-06 15:31:02 -0600198}
199
Simon Glass4397a2a2013-03-19 04:58:51 +0000200fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100201 const char *prop_name, fdt_size_t *sizep)
Simon Glassb5220bc2011-10-24 19:15:32 +0000202{
Stephen Warrend93b9a02015-09-25 10:11:41 -0600203 int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
204
Stephen Warren02464e32015-08-06 15:31:02 -0600205 return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
206 sizeof(fdt_addr_t) / sizeof(fdt32_t),
Stephen Warren6e06acb2016-08-05 09:47:51 -0600207 ns, sizep, false);
Simon Glassb5220bc2011-10-24 19:15:32 +0000208}
209
Mario Six2e386622018-01-15 11:07:35 +0100210fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
Simon Glass4397a2a2013-03-19 04:58:51 +0000211{
212 return fdtdec_get_addr_size(blob, node, prop_name, NULL);
213}
214
Bin Menga62e84d2014-12-31 16:05:11 +0800215int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
216{
217 const char *list, *end;
218 int len;
219
220 list = fdt_getprop(blob, node, "compatible", &len);
221 if (!list)
222 return -ENOENT;
223
224 end = list + len;
225 while (list < end) {
Bin Menga62e84d2014-12-31 16:05:11 +0800226 len = strlen(list);
227 if (len >= strlen("pciVVVV,DDDD")) {
Mario Sixb79221a2018-01-15 11:07:36 +0100228 char *s = strstr(list, "pci");
Bin Menga62e84d2014-12-31 16:05:11 +0800229
230 /*
231 * check if the string is something like pciVVVV,DDDD.RR
232 * or just pciVVVV,DDDD
233 */
234 if (s && s[7] == ',' &&
235 (s[12] == '.' || s[12] == 0)) {
236 s += 3;
237 *vendor = simple_strtol(s, NULL, 16);
238
239 s += 5;
240 *device = simple_strtol(s, NULL, 16);
241
242 return 0;
243 }
Bin Menga62e84d2014-12-31 16:05:11 +0800244 }
Bin Mengbc6351e2015-08-20 06:40:25 -0700245 list += (len + 1);
Bin Menga62e84d2014-12-31 16:05:11 +0800246 }
247
248 return -ENOENT;
249}
250
Simon Glass194fca92020-01-27 08:49:38 -0700251int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
Simon Glassfcc0a872015-11-29 13:17:54 -0700252 u32 *bar)
Bin Menga62e84d2014-12-31 16:05:11 +0800253{
Bin Menga62e84d2014-12-31 16:05:11 +0800254 int barnum;
Bin Menga62e84d2014-12-31 16:05:11 +0800255
256 /* extract the bar number from fdt_pci_addr */
257 barnum = addr->phys_hi & 0xff;
Mario Sixb79221a2018-01-15 11:07:36 +0100258 if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)
Bin Menga62e84d2014-12-31 16:05:11 +0800259 return -EINVAL;
260
261 barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
Simon Glassb717f2f2021-08-01 18:54:18 -0600262
Simon Glassfcc0a872015-11-29 13:17:54 -0700263 *bar = dm_pci_read_bar32(dev, barnum);
Bin Menga62e84d2014-12-31 16:05:11 +0800264
265 return 0;
266}
Suneel Garapati1db7ee42019-10-19 15:19:35 -0700267
268int fdtdec_get_pci_bus_range(const void *blob, int node,
269 struct fdt_resource *res)
270{
271 const u32 *values;
272 int len;
273
274 values = fdt_getprop(blob, node, "bus-range", &len);
275 if (!values || len < sizeof(*values) * 2)
276 return -EINVAL;
277
278 res->start = fdt32_to_cpu(*values++);
279 res->end = fdt32_to_cpu(*values);
280
281 return 0;
282}
Bin Menga62e84d2014-12-31 16:05:11 +0800283
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000284uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
Mario Six2e386622018-01-15 11:07:35 +0100285 uint64_t default_val)
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000286{
Jean-Jacques Hiblotd60ae4c2019-10-22 10:05:22 +0200287 const unaligned_fdt64_t *cell64;
Che-Liang Chiouaadef0a2012-10-25 16:31:05 +0000288 int length;
289
290 cell64 = fdt_getprop(blob, node, prop_name, &length);
291 if (!cell64 || length < sizeof(*cell64))
292 return default_val;
293
294 return fdt64_to_cpu(*cell64);
295}
296
Simon Glassf88fe2d2012-02-27 10:52:34 +0000297int fdtdec_get_is_enabled(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000298{
299 const char *cell;
300
Simon Glassf88fe2d2012-02-27 10:52:34 +0000301 /*
302 * It should say "okay", so only allow that. Some fdts use "ok" but
303 * this is a bug. Please fix your device tree source file. See here
304 * for discussion:
305 *
306 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
307 */
Simon Glassb5220bc2011-10-24 19:15:32 +0000308 cell = fdt_getprop(blob, node, "status", NULL);
309 if (cell)
Mario Sixb79221a2018-01-15 11:07:36 +0100310 return strcmp(cell, "okay") == 0;
Simon Glassf88fe2d2012-02-27 10:52:34 +0000311 return 1;
Simon Glassb5220bc2011-10-24 19:15:32 +0000312}
313
Gerald Van Baren7cde3972012-11-12 23:13:54 -0500314enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
Simon Glassb5220bc2011-10-24 19:15:32 +0000315{
316 enum fdt_compat_id id;
317
318 /* Search our drivers */
319 for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
Mario Sixb79221a2018-01-15 11:07:36 +0100320 if (fdt_node_check_compatible(blob, node,
321 compat_names[id]) == 0)
Simon Glassb5220bc2011-10-24 19:15:32 +0000322 return id;
323 return COMPAT_UNKNOWN;
324}
325
Mario Six2e386622018-01-15 11:07:35 +0100326int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
Simon Glassb5220bc2011-10-24 19:15:32 +0000327{
328 return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
329}
330
Simon Glass3ddecfc2012-04-02 13:18:42 +0000331int fdtdec_next_compatible_subnode(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100332 enum fdt_compat_id id, int *depthp)
Simon Glass3ddecfc2012-04-02 13:18:42 +0000333{
334 do {
335 node = fdt_next_node(blob, node, depthp);
336 } while (*depthp > 1);
337
338 /* If this is a direct subnode, and compatible, return it */
339 if (*depthp == 1 && 0 == fdt_node_check_compatible(
340 blob, node, compat_names[id]))
341 return node;
342
343 return -FDT_ERR_NOTFOUND;
344}
345
Mario Six2e386622018-01-15 11:07:35 +0100346int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
347 int *upto)
Simon Glassb5220bc2011-10-24 19:15:32 +0000348{
349#define MAX_STR_LEN 20
350 char str[MAX_STR_LEN + 20];
351 int node, err;
352
353 /* snprintf() is not available */
354 assert(strlen(name) < MAX_STR_LEN);
355 sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
Simon Glass00878472012-10-31 14:02:42 +0000356 node = fdt_path_offset(blob, str);
Simon Glassb5220bc2011-10-24 19:15:32 +0000357 if (node < 0)
358 return node;
359 err = fdt_node_check_compatible(blob, node, compat_names[id]);
360 if (err < 0)
361 return err;
Simon Glassf88fe2d2012-02-27 10:52:34 +0000362 if (err)
363 return -FDT_ERR_NOTFOUND;
364 (*upto)++;
365 return node;
Simon Glassb5220bc2011-10-24 19:15:32 +0000366}
367
Simon Glassa53f4a22012-01-17 08:20:50 +0000368int fdtdec_find_aliases_for_id(const void *blob, const char *name,
Mario Six2e386622018-01-15 11:07:35 +0100369 enum fdt_compat_id id, int *node_list,
370 int maxcount)
Simon Glassa53f4a22012-01-17 08:20:50 +0000371{
Simon Glassc6782272012-02-03 15:13:53 +0000372 memset(node_list, '\0', sizeof(*node_list) * maxcount);
373
374 return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
375}
376
377/* TODO: Can we tighten this code up a little? */
378int fdtdec_add_aliases_for_id(const void *blob, const char *name,
Mario Six2e386622018-01-15 11:07:35 +0100379 enum fdt_compat_id id, int *node_list,
380 int maxcount)
Simon Glassc6782272012-02-03 15:13:53 +0000381{
Simon Glassa53f4a22012-01-17 08:20:50 +0000382 int name_len = strlen(name);
383 int nodes[maxcount];
384 int num_found = 0;
385 int offset, node;
386 int alias_node;
387 int count;
388 int i, j;
389
390 /* find the alias node if present */
391 alias_node = fdt_path_offset(blob, "/aliases");
392
393 /*
394 * start with nothing, and we can assume that the root node can't
395 * match
396 */
397 memset(nodes, '\0', sizeof(nodes));
398
399 /* First find all the compatible nodes */
400 for (node = count = 0; node >= 0 && count < maxcount;) {
401 node = fdtdec_next_compatible(blob, node, id);
402 if (node >= 0)
403 nodes[count++] = node;
404 }
405 if (node >= 0)
406 debug("%s: warning: maxcount exceeded with alias '%s'\n",
Mario Six2e386622018-01-15 11:07:35 +0100407 __func__, name);
Simon Glassa53f4a22012-01-17 08:20:50 +0000408
409 /* Now find all the aliases */
Simon Glassa53f4a22012-01-17 08:20:50 +0000410 for (offset = fdt_first_property_offset(blob, alias_node);
411 offset > 0;
412 offset = fdt_next_property_offset(blob, offset)) {
413 const struct fdt_property *prop;
414 const char *path;
415 int number;
416 int found;
417
418 node = 0;
419 prop = fdt_get_property_by_offset(blob, offset, NULL);
420 path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
421 if (prop->len && 0 == strncmp(path, name, name_len))
422 node = fdt_path_offset(blob, prop->data);
423 if (node <= 0)
424 continue;
425
426 /* Get the alias number */
Simon Glass0b1284e2021-07-24 09:03:30 -0600427 number = dectoul(path + name_len, NULL);
Simon Glassa53f4a22012-01-17 08:20:50 +0000428 if (number < 0 || number >= maxcount) {
429 debug("%s: warning: alias '%s' is out of range\n",
Mario Six2e386622018-01-15 11:07:35 +0100430 __func__, path);
Simon Glassa53f4a22012-01-17 08:20:50 +0000431 continue;
432 }
433
434 /* Make sure the node we found is actually in our list! */
435 found = -1;
436 for (j = 0; j < count; j++)
437 if (nodes[j] == node) {
438 found = j;
439 break;
440 }
441
442 if (found == -1) {
443 debug("%s: warning: alias '%s' points to a node "
444 "'%s' that is missing or is not compatible "
445 " with '%s'\n", __func__, path,
446 fdt_get_name(blob, node, NULL),
447 compat_names[id]);
448 continue;
449 }
450
451 /*
452 * Add this node to our list in the right place, and mark
453 * it as done.
454 */
455 if (fdtdec_get_is_enabled(blob, node)) {
Simon Glassc6782272012-02-03 15:13:53 +0000456 if (node_list[number]) {
457 debug("%s: warning: alias '%s' requires that "
458 "a node be placed in the list in a "
459 "position which is already filled by "
460 "node '%s'\n", __func__, path,
461 fdt_get_name(blob, node, NULL));
462 continue;
463 }
Simon Glassa53f4a22012-01-17 08:20:50 +0000464 node_list[number] = node;
465 if (number >= num_found)
466 num_found = number + 1;
467 }
Simon Glassc6782272012-02-03 15:13:53 +0000468 nodes[found] = 0;
Simon Glassa53f4a22012-01-17 08:20:50 +0000469 }
470
471 /* Add any nodes not mentioned by an alias */
472 for (i = j = 0; i < maxcount; i++) {
473 if (!node_list[i]) {
474 for (; j < maxcount; j++)
475 if (nodes[j] &&
Mario Six2e386622018-01-15 11:07:35 +0100476 fdtdec_get_is_enabled(blob, nodes[j]))
Simon Glassa53f4a22012-01-17 08:20:50 +0000477 break;
478
479 /* Have we run out of nodes to add? */
480 if (j == maxcount)
481 break;
482
483 assert(!node_list[i]);
484 node_list[i] = nodes[j++];
485 if (i >= num_found)
486 num_found = i + 1;
487 }
488 }
489
490 return num_found;
491}
492
Simon Glass5c33c9f2014-07-23 06:55:09 -0600493int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
494 int *seqp)
495{
496 int base_len = strlen(base);
497 const char *find_name;
498 int find_namelen;
499 int prop_offset;
500 int aliases;
501
502 find_name = fdt_get_name(blob, offset, &find_namelen);
503 debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
504
505 aliases = fdt_path_offset(blob, "/aliases");
506 for (prop_offset = fdt_first_property_offset(blob, aliases);
507 prop_offset > 0;
508 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
509 const char *prop;
510 const char *name;
511 const char *slash;
Simon Glassc4af6732015-06-23 15:39:08 -0600512 int len, val;
Simon Glass5c33c9f2014-07-23 06:55:09 -0600513
514 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
515 debug(" - %s, %s\n", name, prop);
516 if (len < find_namelen || *prop != '/' || prop[len - 1] ||
517 strncmp(name, base, base_len))
518 continue;
519
520 slash = strrchr(prop, '/');
521 if (strcmp(slash + 1, find_name))
522 continue;
Aswath Govindrajuc5891322020-12-03 10:55:45 +0530523
524 /*
525 * Adding an extra check to distinguish DT nodes with
526 * same name
527 */
Simon Glassebc1d502022-12-21 16:08:28 -0700528 if (IS_ENABLED(CONFIG_PHANDLE_CHECK_SEQ)) {
529 if (fdt_get_phandle(blob, offset) !=
530 fdt_get_phandle(blob, fdt_path_offset(blob, prop)))
531 continue;
532 }
Aswath Govindrajuc5891322020-12-03 10:55:45 +0530533
Simon Glassc4af6732015-06-23 15:39:08 -0600534 val = trailing_strtol(name);
535 if (val != -1) {
536 *seqp = val;
537 debug("Found seq %d\n", *seqp);
538 return 0;
Simon Glass5c33c9f2014-07-23 06:55:09 -0600539 }
540 }
541
542 debug("Not found\n");
543 return -ENOENT;
544}
545
Michal Simek003c9dc2019-01-31 16:30:58 +0100546int fdtdec_get_alias_highest_id(const void *blob, const char *base)
547{
548 int base_len = strlen(base);
549 int prop_offset;
550 int aliases;
551 int max = -1;
552
553 debug("Looking for highest alias id for '%s'\n", base);
554
555 aliases = fdt_path_offset(blob, "/aliases");
556 for (prop_offset = fdt_first_property_offset(blob, aliases);
557 prop_offset > 0;
558 prop_offset = fdt_next_property_offset(blob, prop_offset)) {
559 const char *prop;
560 const char *name;
561 int len, val;
562
563 prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
564 debug(" - %s, %s\n", name, prop);
565 if (*prop != '/' || prop[len - 1] ||
566 strncmp(name, base, base_len))
567 continue;
568
569 val = trailing_strtol(name);
570 if (val > max) {
571 debug("Found seq %d\n", val);
572 max = val;
573 }
574 }
575
576 return max;
577}
578
Simon Glass3bc37a52015-10-17 19:41:14 -0600579const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
580{
581 int chosen_node;
582
583 if (!blob)
584 return NULL;
585 chosen_node = fdt_path_offset(blob, "/chosen");
586 return fdt_getprop(blob, chosen_node, name, NULL);
587}
588
Simon Glassaac07d42014-09-04 16:27:24 -0600589int fdtdec_get_chosen_node(const void *blob, const char *name)
590{
591 const char *prop;
Simon Glassaac07d42014-09-04 16:27:24 -0600592
Simon Glass3bc37a52015-10-17 19:41:14 -0600593 prop = fdtdec_get_chosen_prop(blob, name);
Simon Glassaac07d42014-09-04 16:27:24 -0600594 if (!prop)
595 return -FDT_ERR_NOTFOUND;
596 return fdt_path_offset(blob, prop);
597}
598
Simon Glassb62d3492022-12-21 16:08:19 -0700599/**
600 * fdtdec_prepare_fdt() - Check we have a valid fdt available to control U-Boot
601 *
Simon Glassec4f3272022-12-21 16:08:20 -0700602 * @blob: Blob to check
603 *
Simon Glassb62d3492022-12-21 16:08:19 -0700604 * If not, a message is printed to the console if the console is ready.
605 *
606 * Return: 0 if all ok, -ENOENT if not
Simon Glassb5220bc2011-10-24 19:15:32 +0000607 */
Simon Glassec4f3272022-12-21 16:08:20 -0700608static int fdtdec_prepare_fdt(const void *blob)
Simon Glassb5220bc2011-10-24 19:15:32 +0000609{
Simon Glassec4f3272022-12-21 16:08:20 -0700610 if (!blob || ((uintptr_t)blob & 3) || fdt_check_header(blob)) {
Simon Glassb62d3492022-12-21 16:08:19 -0700611 if (spl_phase() <= PHASE_SPL) {
612 puts("Missing DTB\n");
613 } else {
614 printf("No valid device tree binary found at %p\n",
Simon Glassec4f3272022-12-21 16:08:20 -0700615 blob);
616 if (_DEBUG && blob) {
617 printf("fdt_blob=%p\n", blob);
618 print_buffer((ulong)blob, blob, 4, 32, 0);
Simon Glassb62d3492022-12-21 16:08:19 -0700619 }
Simon Glasscb5f97f702015-06-23 15:39:09 -0600620 }
Simon Glassb62d3492022-12-21 16:08:19 -0700621 return -ENOENT;
Simon Glass9a263e52012-03-28 10:08:24 +0000622 }
Simon Glassb62d3492022-12-21 16:08:19 -0700623
Simon Glassb5220bc2011-10-24 19:15:32 +0000624 return 0;
625}
Simon Glassd17da652012-02-27 10:52:35 +0000626
Simon Glassc662d0b2022-12-21 16:08:18 -0700627int fdtdec_check_fdt(void)
628{
629 /*
630 * We must have an FDT, but we cannot panic() yet since the console
631 * is not ready. So for now, just assert(). Boards which need an early
632 * FDT (prior to console ready) will need to make their own
633 * arrangements and do their own checks.
634 */
Simon Glassec4f3272022-12-21 16:08:20 -0700635 assert(!fdtdec_prepare_fdt(gd->fdt_blob));
Simon Glassc662d0b2022-12-21 16:08:18 -0700636 return 0;
637}
638
Simon Glassd17da652012-02-27 10:52:35 +0000639int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
640{
641 const u32 *phandle;
642 int lookup;
643
Simon Glass1cb23232012-07-12 05:25:01 +0000644 debug("%s: %s\n", __func__, prop_name);
Simon Glassd17da652012-02-27 10:52:35 +0000645 phandle = fdt_getprop(blob, node, prop_name, NULL);
646 if (!phandle)
647 return -FDT_ERR_NOTFOUND;
648
649 lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
650 return lookup;
651}
652
653/**
654 * Look up a property in a node and check that it has a minimum length.
655 *
656 * @param blob FDT blob
657 * @param node node to examine
658 * @param prop_name name of property to find
659 * @param min_len minimum property length in bytes
660 * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
661 found, or -FDT_ERR_BADLAYOUT if not enough data
Heinrich Schuchardt185f8122022-01-19 18:05:50 +0100662 * Return: pointer to cell, which is only valid if err == 0
Simon Glassd17da652012-02-27 10:52:35 +0000663 */
664static const void *get_prop_check_min_len(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100665 const char *prop_name, int min_len,
666 int *err)
Simon Glassd17da652012-02-27 10:52:35 +0000667{
668 const void *cell;
669 int len;
670
671 debug("%s: %s\n", __func__, prop_name);
672 cell = fdt_getprop(blob, node, prop_name, &len);
673 if (!cell)
674 *err = -FDT_ERR_NOTFOUND;
675 else if (len < min_len)
676 *err = -FDT_ERR_BADLAYOUT;
677 else
678 *err = 0;
679 return cell;
680}
681
682int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
Mario Six2e386622018-01-15 11:07:35 +0100683 u32 *array, int count)
Simon Glassd17da652012-02-27 10:52:35 +0000684{
685 const u32 *cell;
Mario Sixb79221a2018-01-15 11:07:36 +0100686 int err = 0;
Simon Glassd17da652012-02-27 10:52:35 +0000687
688 debug("%s: %s\n", __func__, prop_name);
689 cell = get_prop_check_min_len(blob, node, prop_name,
690 sizeof(u32) * count, &err);
691 if (!err) {
Mario Sixb79221a2018-01-15 11:07:36 +0100692 int i;
693
Simon Glassd17da652012-02-27 10:52:35 +0000694 for (i = 0; i < count; i++)
695 array[i] = fdt32_to_cpu(cell[i]);
696 }
697 return err;
698}
699
Simon Glassa9f04d42014-11-10 18:00:19 -0700700int fdtdec_get_int_array_count(const void *blob, int node,
701 const char *prop_name, u32 *array, int count)
702{
703 const u32 *cell;
704 int len, elems;
705 int i;
706
707 debug("%s: %s\n", __func__, prop_name);
708 cell = fdt_getprop(blob, node, prop_name, &len);
709 if (!cell)
710 return -FDT_ERR_NOTFOUND;
711 elems = len / sizeof(u32);
712 if (count > elems)
713 count = elems;
714 for (i = 0; i < count; i++)
715 array[i] = fdt32_to_cpu(cell[i]);
716
717 return count;
718}
719
Simon Glass96875e72012-04-02 13:18:41 +0000720const u32 *fdtdec_locate_array(const void *blob, int node,
721 const char *prop_name, int count)
722{
723 const u32 *cell;
724 int err;
725
726 cell = get_prop_check_min_len(blob, node, prop_name,
727 sizeof(u32) * count, &err);
728 return err ? NULL : cell;
729}
730
Simon Glassd17da652012-02-27 10:52:35 +0000731int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
732{
733 const s32 *cell;
734 int len;
735
736 debug("%s: %s\n", __func__, prop_name);
737 cell = fdt_getprop(blob, node, prop_name, &len);
738 return cell != NULL;
739}
Simon Glassed3ee5c2012-02-27 10:52:36 +0000740
Simon Glass57068a72015-01-05 20:05:26 -0700741int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
742 const char *list_name,
743 const char *cells_name,
744 int cell_count, int index,
745 struct fdtdec_phandle_args *out_args)
746{
747 const __be32 *list, *list_end;
748 int rc = 0, size, cur_index = 0;
749 uint32_t count = 0;
750 int node = -1;
751 int phandle;
752
753 /* Retrieve the phandle list property */
754 list = fdt_getprop(blob, src_node, list_name, &size);
755 if (!list)
756 return -ENOENT;
757 list_end = list + size / sizeof(*list);
758
759 /* Loop over the phandles until all the requested entry is found */
760 while (list < list_end) {
761 rc = -EINVAL;
762 count = 0;
763
764 /*
765 * If phandle is 0, then it is an empty entry with no
766 * arguments. Skip forward to the next entry.
767 */
768 phandle = be32_to_cpup(list++);
769 if (phandle) {
770 /*
771 * Find the provider node and parse the #*-cells
772 * property to determine the argument length.
773 *
774 * This is not needed if the cell count is hard-coded
775 * (i.e. cells_name not set, but cell_count is set),
776 * except when we're going to return the found node
777 * below.
778 */
779 if (cells_name || cur_index == index) {
780 node = fdt_node_offset_by_phandle(blob,
781 phandle);
Patrick Delaunaycba487c2020-09-25 09:41:15 +0200782 if (node < 0) {
Simon Glass57068a72015-01-05 20:05:26 -0700783 debug("%s: could not find phandle\n",
784 fdt_get_name(blob, src_node,
785 NULL));
786 goto err;
787 }
788 }
789
790 if (cells_name) {
791 count = fdtdec_get_int(blob, node, cells_name,
792 -1);
793 if (count == -1) {
794 debug("%s: could not get %s for %s\n",
795 fdt_get_name(blob, src_node,
796 NULL),
797 cells_name,
798 fdt_get_name(blob, node,
799 NULL));
800 goto err;
801 }
802 } else {
803 count = cell_count;
804 }
805
806 /*
807 * Make sure that the arguments actually fit in the
808 * remaining property data length
809 */
810 if (list + count > list_end) {
811 debug("%s: arguments longer than property\n",
812 fdt_get_name(blob, src_node, NULL));
813 goto err;
814 }
815 }
816
817 /*
818 * All of the error cases above bail out of the loop, so at
819 * this point, the parsing is successful. If the requested
820 * index matches, then fill the out_args structure and return,
821 * or return -ENOENT for an empty entry.
822 */
823 rc = -ENOENT;
824 if (cur_index == index) {
825 if (!phandle)
826 goto err;
827
828 if (out_args) {
829 int i;
830
831 if (count > MAX_PHANDLE_ARGS) {
832 debug("%s: too many arguments %d\n",
833 fdt_get_name(blob, src_node,
834 NULL), count);
835 count = MAX_PHANDLE_ARGS;
836 }
837 out_args->node = node;
838 out_args->args_count = count;
839 for (i = 0; i < count; i++) {
840 out_args->args[i] =
841 be32_to_cpup(list++);
842 }
843 }
844
845 /* Found it! return success */
846 return 0;
847 }
848
849 node = -1;
850 list += count;
851 cur_index++;
852 }
853
854 /*
855 * Result will be one of:
856 * -ENOENT : index is for empty phandle
857 * -EINVAL : parsing error on data
858 * [1..n] : Number of phandle (count mode; when index = -1)
859 */
860 rc = index < 0 ? cur_index : -ENOENT;
861 err:
862 return rc;
863}
864
Anton Staffbed4d892012-04-17 09:01:28 +0000865int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
Mario Six2e386622018-01-15 11:07:35 +0100866 u8 *array, int count)
Anton Staffbed4d892012-04-17 09:01:28 +0000867{
868 const u8 *cell;
869 int err;
870
871 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
872 if (!err)
873 memcpy(array, cell, count);
874 return err;
875}
876
877const u8 *fdtdec_locate_byte_array(const void *blob, int node,
Mario Six2e386622018-01-15 11:07:35 +0100878 const char *prop_name, int count)
Anton Staffbed4d892012-04-17 09:01:28 +0000879{
880 const u8 *cell;
881 int err;
882
883 cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
884 if (err)
885 return NULL;
886 return cell;
887}
Abhilash Kesavan09258f12012-10-25 16:30:58 +0000888
Simon Glass5f7bfdd2015-03-05 12:25:14 -0700889u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
Thierry Reding56f42242014-08-26 17:33:53 +0200890{
891 u64 number = 0;
892
893 while (cells--)
894 number = (number << 32) | fdt32_to_cpu(*ptr++);
895
896 return number;
897}
898
899int fdt_get_resource(const void *fdt, int node, const char *property,
900 unsigned int index, struct fdt_resource *res)
901{
902 const fdt32_t *ptr, *end;
903 int na, ns, len, parent;
904 unsigned int i = 0;
905
906 parent = fdt_parent_offset(fdt, node);
907 if (parent < 0)
908 return parent;
909
910 na = fdt_address_cells(fdt, parent);
911 ns = fdt_size_cells(fdt, parent);
912
913 ptr = fdt_getprop(fdt, node, property, &len);
914 if (!ptr)
915 return len;
916
917 end = ptr + len / sizeof(*ptr);
918
919 while (ptr + na + ns <= end) {
920 if (i == index) {
Patrick Delaunayfeb7ac42021-04-06 09:38:06 +0200921 if (CONFIG_IS_ENABLED(OF_TRANSLATE))
922 res->start = fdt_translate_address(fdt, node, ptr);
923 else
924 res->start = fdtdec_get_number(ptr, na);
925
Mario Sixb79221a2018-01-15 11:07:36 +0100926 res->end = res->start;
Thierry Reding56f42242014-08-26 17:33:53 +0200927 res->end += fdtdec_get_number(&ptr[na], ns) - 1;
928 return 0;
929 }
930
931 ptr += na + ns;
932 i++;
933 }
934
935 return -FDT_ERR_NOTFOUND;
936}
937
938int fdt_get_named_resource(const void *fdt, int node, const char *property,
939 const char *prop_names, const char *name,
940 struct fdt_resource *res)
941{
942 int index;
943
Simon Glassb02e4042016-10-02 17:59:28 -0600944 index = fdt_stringlist_search(fdt, node, prop_names, name);
Thierry Reding56f42242014-08-26 17:33:53 +0200945 if (index < 0)
946 return index;
947
948 return fdt_get_resource(fdt, node, property, index, res);
949}
Thierry Reding9f85eee2014-08-26 17:33:54 +0200950
Simon Glass12e67112015-04-14 21:03:21 -0600951static int decode_timing_property(const void *blob, int node, const char *name,
952 struct timing_entry *result)
953{
954 int length, ret = 0;
955 const u32 *prop;
956
957 prop = fdt_getprop(blob, node, name, &length);
958 if (!prop) {
959 debug("%s: could not find property %s\n",
960 fdt_get_name(blob, node, NULL), name);
961 return length;
962 }
963
964 if (length == sizeof(u32)) {
965 result->typ = fdtdec_get_int(blob, node, name, 0);
966 result->min = result->typ;
967 result->max = result->typ;
968 } else {
969 ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
970 }
971
972 return ret;
973}
974
975int fdtdec_decode_display_timing(const void *blob, int parent, int index,
976 struct display_timing *dt)
977{
978 int i, node, timings_node;
979 u32 val = 0;
980 int ret = 0;
981
982 timings_node = fdt_subnode_offset(blob, parent, "display-timings");
983 if (timings_node < 0)
984 return timings_node;
985
986 for (i = 0, node = fdt_first_subnode(blob, timings_node);
987 node > 0 && i != index;
988 node = fdt_next_subnode(blob, node))
989 i++;
990
991 if (node < 0)
992 return node;
993
994 memset(dt, 0, sizeof(*dt));
995
996 ret |= decode_timing_property(blob, node, "hback-porch",
997 &dt->hback_porch);
998 ret |= decode_timing_property(blob, node, "hfront-porch",
999 &dt->hfront_porch);
1000 ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
1001 ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
1002 ret |= decode_timing_property(blob, node, "vback-porch",
1003 &dt->vback_porch);
1004 ret |= decode_timing_property(blob, node, "vfront-porch",
1005 &dt->vfront_porch);
1006 ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
1007 ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
1008 ret |= decode_timing_property(blob, node, "clock-frequency",
1009 &dt->pixelclock);
1010
1011 dt->flags = 0;
1012 val = fdtdec_get_int(blob, node, "vsync-active", -1);
1013 if (val != -1) {
1014 dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
1015 DISPLAY_FLAGS_VSYNC_LOW;
1016 }
1017 val = fdtdec_get_int(blob, node, "hsync-active", -1);
1018 if (val != -1) {
1019 dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
1020 DISPLAY_FLAGS_HSYNC_LOW;
1021 }
1022 val = fdtdec_get_int(blob, node, "de-active", -1);
1023 if (val != -1) {
1024 dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
1025 DISPLAY_FLAGS_DE_LOW;
1026 }
1027 val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
1028 if (val != -1) {
1029 dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
1030 DISPLAY_FLAGS_PIXDATA_NEGEDGE;
1031 }
1032
1033 if (fdtdec_get_bool(blob, node, "interlaced"))
1034 dt->flags |= DISPLAY_FLAGS_INTERLACED;
1035 if (fdtdec_get_bool(blob, node, "doublescan"))
1036 dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
1037 if (fdtdec_get_bool(blob, node, "doubleclk"))
1038 dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
1039
Simon Glass04b9dd12016-05-05 07:28:21 -06001040 return ret;
Simon Glass12e67112015-04-14 21:03:21 -06001041}
1042
Michal Simek50c7b722020-07-10 13:16:50 +02001043int fdtdec_setup_mem_size_base(void)
Nathan Rossi623f6012016-12-19 00:03:34 +10001044{
Michal Simekc2f09502020-07-10 13:34:44 +02001045 int ret;
1046 ofnode mem;
1047 struct resource res;
Nathan Rossi623f6012016-12-19 00:03:34 +10001048
Michal Simekc2f09502020-07-10 13:34:44 +02001049 mem = ofnode_path("/memory");
1050 if (!ofnode_valid(mem)) {
Nathan Rossi623f6012016-12-19 00:03:34 +10001051 debug("%s: Missing /memory node\n", __func__);
1052 return -EINVAL;
1053 }
1054
Michal Simekc2f09502020-07-10 13:34:44 +02001055 ret = ofnode_read_resource(mem, 0, &res);
Nathan Rossi623f6012016-12-19 00:03:34 +10001056 if (ret != 0) {
1057 debug("%s: Unable to decode first memory bank\n", __func__);
1058 return -EINVAL;
1059 }
1060
1061 gd->ram_size = (phys_size_t)(res.end - res.start + 1);
Siva Durga Prasad Paladugu1473b122018-07-16 15:56:10 +05301062 gd->ram_base = (unsigned long)res.start;
Simon Glassc69380f2017-05-27 07:38:13 -06001063 debug("%s: Initial DRAM size %llx\n", __func__,
1064 (unsigned long long)gd->ram_size);
Nathan Rossi623f6012016-12-19 00:03:34 +10001065
1066 return 0;
1067}
1068
Michal Simekc2f09502020-07-10 13:34:44 +02001069ofnode get_next_memory_node(ofnode mem)
Jens Wiklander452bc122018-07-13 12:12:11 +02001070{
Jens Wiklander452bc122018-07-13 12:12:11 +02001071 do {
Michal Simekc2f09502020-07-10 13:34:44 +02001072 mem = ofnode_by_prop_value(mem, "device_type", "memory", 7);
Simon Glass89090662022-09-06 20:27:17 -06001073 } while (!ofnode_is_enabled(mem));
Jens Wiklander452bc122018-07-13 12:12:11 +02001074
1075 return mem;
1076}
1077
Michal Simek62897c42020-07-10 13:16:49 +02001078int fdtdec_setup_memory_banksize(void)
Nathan Rossi623f6012016-12-19 00:03:34 +10001079{
Michal Simekc2f09502020-07-10 13:34:44 +02001080 int bank, ret, reg = 0;
1081 struct resource res;
1082 ofnode mem = ofnode_null();
Nathan Rossi623f6012016-12-19 00:03:34 +10001083
Michal Simekc2f09502020-07-10 13:34:44 +02001084 mem = get_next_memory_node(mem);
1085 if (!ofnode_valid(mem)) {
Michal Simek658954c2018-10-03 15:53:52 +02001086 debug("%s: Missing /memory node\n", __func__);
1087 return -EINVAL;
1088 }
Nathan Rossi623f6012016-12-19 00:03:34 +10001089
1090 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
Michal Simekc2f09502020-07-10 13:34:44 +02001091 ret = ofnode_read_resource(mem, reg++, &res);
1092 if (ret < 0) {
Marek Vasut942ee092017-11-27 05:32:42 +01001093 reg = 0;
Michal Simekc2f09502020-07-10 13:34:44 +02001094 mem = get_next_memory_node(mem);
Marek Vasut81d0cef2020-09-12 12:42:52 +02001095 if (!ofnode_valid(mem))
Michal Simek658954c2018-10-03 15:53:52 +02001096 break;
1097
Michal Simekc2f09502020-07-10 13:34:44 +02001098 ret = ofnode_read_resource(mem, reg++, &res);
1099 if (ret < 0)
Michal Simek658954c2018-10-03 15:53:52 +02001100 break;
1101 }
Michal Simekc2f09502020-07-10 13:34:44 +02001102
1103 if (ret != 0)
Michal Simek658954c2018-10-03 15:53:52 +02001104 return -EINVAL;
Nathan Rossi623f6012016-12-19 00:03:34 +10001105
1106 gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
1107 gd->bd->bi_dram[bank].size =
1108 (phys_size_t)(res.end - res.start + 1);
1109
1110 debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
1111 __func__, bank,
1112 (unsigned long long)gd->bd->bi_dram[bank].start,
1113 (unsigned long long)gd->bd->bi_dram[bank].size);
1114 }
1115
1116 return 0;
1117}
Michal Simek7fce7392020-07-09 14:09:52 +02001118
1119int fdtdec_setup_mem_size_base_lowest(void)
1120{
Michal Simekc2f09502020-07-10 13:34:44 +02001121 int bank, ret, reg = 0;
1122 struct resource res;
Michal Simek7fce7392020-07-09 14:09:52 +02001123 unsigned long base;
1124 phys_size_t size;
Michal Simekc2f09502020-07-10 13:34:44 +02001125 ofnode mem = ofnode_null();
Michal Simek7fce7392020-07-09 14:09:52 +02001126
1127 gd->ram_base = (unsigned long)~0;
1128
Michal Simekc2f09502020-07-10 13:34:44 +02001129 mem = get_next_memory_node(mem);
1130 if (!ofnode_valid(mem)) {
Michal Simek7fce7392020-07-09 14:09:52 +02001131 debug("%s: Missing /memory node\n", __func__);
1132 return -EINVAL;
1133 }
1134
1135 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
Michal Simekc2f09502020-07-10 13:34:44 +02001136 ret = ofnode_read_resource(mem, reg++, &res);
1137 if (ret < 0) {
Michal Simek7fce7392020-07-09 14:09:52 +02001138 reg = 0;
Michal Simekc2f09502020-07-10 13:34:44 +02001139 mem = get_next_memory_node(mem);
Marek Vasut81d0cef2020-09-12 12:42:52 +02001140 if (!ofnode_valid(mem))
Michal Simek7fce7392020-07-09 14:09:52 +02001141 break;
1142
Michal Simekc2f09502020-07-10 13:34:44 +02001143 ret = ofnode_read_resource(mem, reg++, &res);
1144 if (ret < 0)
Michal Simek7fce7392020-07-09 14:09:52 +02001145 break;
1146 }
Michal Simekc2f09502020-07-10 13:34:44 +02001147
Michal Simek7fce7392020-07-09 14:09:52 +02001148 if (ret != 0)
1149 return -EINVAL;
1150
1151 base = (unsigned long)res.start;
1152 size = (phys_size_t)(res.end - res.start + 1);
1153
1154 if (gd->ram_base > base && size) {
1155 gd->ram_base = base;
1156 gd->ram_size = size;
1157 debug("%s: Initial DRAM base %lx size %lx\n",
1158 __func__, base, (unsigned long)size);
1159 }
1160 }
1161
1162 return 0;
1163}
Nathan Rossi623f6012016-12-19 00:03:34 +10001164
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001165static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
1166{
Simon Glassb4b6daf2021-12-16 20:59:25 -07001167#if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
1168 CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
Marek Vasut95f4bbd2019-03-08 16:06:55 +01001169 size_t sz_out = CONFIG_VAL(MULTI_DTB_FIT_UNCOMPRESS_SZ);
Marek Vasut1fd30352019-03-13 21:11:22 +01001170 bool gzip = 0, lzo = 0;
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001171 ulong sz_in = sz_src;
1172 void *dst;
1173 int rc;
1174
1175 if (CONFIG_IS_ENABLED(GZIP))
Marek Vasut1fd30352019-03-13 21:11:22 +01001176 if (gzip_parse_header(src, sz_in) >= 0)
1177 gzip = 1;
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001178 if (CONFIG_IS_ENABLED(LZO))
Marek Vasut1fd30352019-03-13 21:11:22 +01001179 if (!gzip && lzop_is_valid_header(src))
1180 lzo = 1;
1181
1182 if (!gzip && !lzo)
1183 return -EBADMSG;
1184
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001185
1186 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
1187 dst = malloc(sz_out);
1188 if (!dst) {
1189 puts("uncompress_blob: Unable to allocate memory\n");
1190 return -ENOMEM;
1191 }
1192 } else {
Simon Glassb4b6daf2021-12-16 20:59:25 -07001193# if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001194 dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
Simon Glassb4b6daf2021-12-16 20:59:25 -07001195# else
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001196 return -ENOTSUPP;
Simon Glassb4b6daf2021-12-16 20:59:25 -07001197# endif
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001198 }
1199
Marek Vasut1fd30352019-03-13 21:11:22 +01001200 if (CONFIG_IS_ENABLED(GZIP) && gzip)
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001201 rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
Marek Vasut1fd30352019-03-13 21:11:22 +01001202 else if (CONFIG_IS_ENABLED(LZO) && lzo)
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001203 rc = lzop_decompress(src, sz_in, dst, &sz_out);
Marek Vasut1fd30352019-03-13 21:11:22 +01001204 else
1205 hang();
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001206
1207 if (rc < 0) {
1208 /* not a valid compressed blob */
1209 puts("uncompress_blob: Unable to uncompress\n");
1210 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
1211 free(dst);
1212 return -EBADMSG;
1213 }
1214 *dstp = dst;
Simon Glassb4b6daf2021-12-16 20:59:25 -07001215#else
Marek Vasut410d9b62018-10-18 20:37:05 +02001216 *dstp = (void *)src;
Simon Glassb4b6daf2021-12-16 20:59:25 -07001217 *dstp = (void *)src;
1218#endif
Marek Vasut410d9b62018-10-18 20:37:05 +02001219 return 0;
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001220}
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001221
Simon Glass98550342021-12-16 20:59:31 -07001222/**
1223 * fdt_find_separate() - Find a devicetree at the end of the image
1224 *
Heinrich Schuchardt185f8122022-01-19 18:05:50 +01001225 * Return: pointer to FDT blob
Rob Clark3b595da2018-01-10 11:34:37 +01001226 */
Simon Glass98550342021-12-16 20:59:31 -07001227static void *fdt_find_separate(void)
Rob Clark3b595da2018-01-10 11:34:37 +01001228{
1229 void *fdt_blob = NULL;
Ilias Apalodimase7fb7892021-10-26 09:12:33 +03001230
Simon Glass423cf0a2022-02-28 12:08:24 -07001231 if (IS_ENABLED(CONFIG_SANDBOX))
1232 return NULL;
1233
Rob Clark3b595da2018-01-10 11:34:37 +01001234#ifdef CONFIG_SPL_BUILD
1235 /* FDT is at end of BSS unless it is in a different memory region */
Andrew Abbott0de71bb2022-04-16 10:12:31 +10001236 if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
Shiji Yangccea96f2023-08-03 09:47:17 +08001237 fdt_blob = (ulong *)_image_binary_end;
Rob Clark3b595da2018-01-10 11:34:37 +01001238 else
Shiji Yangccea96f2023-08-03 09:47:17 +08001239 fdt_blob = (ulong *)__bss_end;
Rob Clark3b595da2018-01-10 11:34:37 +01001240#else
1241 /* FDT is at end of image */
Shiji Yangccea96f2023-08-03 09:47:17 +08001242 fdt_blob = (ulong *)_end;
Simon Glass95575922022-12-21 16:08:21 -07001243
1244 if (_DEBUG && !fdtdec_prepare_fdt(fdt_blob)) {
1245 int stack_ptr;
1246 const void *top = fdt_blob + fdt_totalsize(fdt_blob);
1247
1248 /*
1249 * Perform a sanity check on the memory layout. If this fails,
1250 * it indicates that the device tree is positioned above the
1251 * global data pointer or the stack pointer. This should not
1252 * happen.
1253 *
1254 * If this fails, check that SYS_INIT_SP_ADDR has enough space
1255 * below it for SYS_MALLOC_F_LEN and global_data, as well as the
1256 * stack, without overwriting the device tree or U-Boot itself.
1257 * Since the device tree is sitting at _end (the start of the
1258 * BSS region), we need the top of the device tree to be below
1259 * any memory allocated by board_init_f_alloc_reserve().
1260 */
1261 if (top > (void *)gd || top > (void *)&stack_ptr) {
1262 printf("FDT %p gd %p\n", fdt_blob, gd);
1263 panic("FDT overlap");
1264 }
1265 }
Rob Clark3b595da2018-01-10 11:34:37 +01001266#endif
Ilias Apalodimase7fb7892021-10-26 09:12:33 +03001267
Rob Clark3b595da2018-01-10 11:34:37 +01001268 return fdt_blob;
1269}
Rob Clark3b595da2018-01-10 11:34:37 +01001270
Thierry Redingebf30e82019-04-15 11:32:13 +02001271int fdtdec_set_ethernet_mac_address(void *fdt, const u8 *mac, size_t size)
1272{
1273 const char *path;
1274 int offset, err;
1275
1276 if (!is_valid_ethaddr(mac))
1277 return -EINVAL;
1278
1279 path = fdt_get_alias(fdt, "ethernet");
1280 if (!path)
1281 return 0;
1282
1283 debug("ethernet alias found: %s\n", path);
1284
1285 offset = fdt_path_offset(fdt, path);
1286 if (offset < 0) {
1287 debug("ethernet alias points to absent node %s\n", path);
1288 return -ENOENT;
1289 }
1290
1291 err = fdt_setprop_inplace(fdt, offset, "local-mac-address", mac, size);
1292 if (err < 0)
1293 return err;
1294
1295 debug("MAC address: %pM\n", mac);
1296
1297 return 0;
1298}
1299
Thierry Redingc9222a02019-03-21 19:10:02 +01001300static int fdtdec_init_reserved_memory(void *blob)
1301{
1302 int na, ns, node, err;
1303 fdt32_t value;
1304
1305 /* inherit #address-cells and #size-cells from the root node */
1306 na = fdt_address_cells(blob, 0);
1307 ns = fdt_size_cells(blob, 0);
1308
1309 node = fdt_add_subnode(blob, 0, "reserved-memory");
1310 if (node < 0)
1311 return node;
1312
1313 err = fdt_setprop(blob, node, "ranges", NULL, 0);
1314 if (err < 0)
1315 return err;
1316
1317 value = cpu_to_fdt32(ns);
1318
1319 err = fdt_setprop(blob, node, "#size-cells", &value, sizeof(value));
1320 if (err < 0)
1321 return err;
1322
1323 value = cpu_to_fdt32(na);
1324
1325 err = fdt_setprop(blob, node, "#address-cells", &value, sizeof(value));
1326 if (err < 0)
1327 return err;
1328
1329 return node;
1330}
1331
1332int fdtdec_add_reserved_memory(void *blob, const char *basename,
1333 const struct fdt_memory *carveout,
Thierry Reding46cb0672021-09-03 15:16:19 +02001334 const char **compatibles, unsigned int count,
Thierry Redingb9aad372021-09-03 15:16:21 +02001335 uint32_t *phandlep, unsigned long flags)
Thierry Redingc9222a02019-03-21 19:10:02 +01001336{
1337 fdt32_t cells[4] = {}, *ptr = cells;
1338 uint32_t upper, lower, phandle;
1339 int parent, node, na, ns, err;
Thierry Reding3bf2f152019-04-15 10:08:21 +02001340 fdt_size_t size;
Thierry Redingc9222a02019-03-21 19:10:02 +01001341 char name[64];
1342
1343 /* create an empty /reserved-memory node if one doesn't exist */
1344 parent = fdt_path_offset(blob, "/reserved-memory");
1345 if (parent < 0) {
1346 parent = fdtdec_init_reserved_memory(blob);
1347 if (parent < 0)
1348 return parent;
1349 }
1350
1351 /* only 1 or 2 #address-cells and #size-cells are supported */
1352 na = fdt_address_cells(blob, parent);
1353 if (na < 1 || na > 2)
1354 return -FDT_ERR_BADNCELLS;
1355
1356 ns = fdt_size_cells(blob, parent);
1357 if (ns < 1 || ns > 2)
1358 return -FDT_ERR_BADNCELLS;
1359
1360 /* find a matching node and return the phandle to that */
1361 fdt_for_each_subnode(node, blob, parent) {
1362 const char *name = fdt_get_name(blob, node, NULL);
Bin Menga9ad1132020-05-19 23:38:32 -07001363 fdt_addr_t addr;
1364 fdt_size_t size;
Thierry Redingc9222a02019-03-21 19:10:02 +01001365
Bin Mengf6704c72020-05-19 23:38:33 -07001366 addr = fdtdec_get_addr_size_fixed(blob, node, "reg", 0, na, ns,
1367 &size, false);
Thierry Redingc9222a02019-03-21 19:10:02 +01001368 if (addr == FDT_ADDR_T_NONE) {
1369 debug("failed to read address/size for %s\n", name);
1370 continue;
1371 }
1372
Atish Patraf6147532020-04-21 11:15:00 -07001373 if (addr == carveout->start && (addr + size - 1) ==
1374 carveout->end) {
Heiko Stuebner086336a2019-10-23 16:46:38 +02001375 if (phandlep)
1376 *phandlep = fdt_get_phandle(blob, node);
Thierry Redingc9222a02019-03-21 19:10:02 +01001377 return 0;
1378 }
1379 }
1380
1381 /*
1382 * Unpack the start address and generate the name of the new node
1383 * base on the basename and the unit-address.
1384 */
Thierry Reding3bf2f152019-04-15 10:08:21 +02001385 upper = upper_32_bits(carveout->start);
1386 lower = lower_32_bits(carveout->start);
Thierry Redingc9222a02019-03-21 19:10:02 +01001387
1388 if (na > 1 && upper > 0)
1389 snprintf(name, sizeof(name), "%s@%x,%x", basename, upper,
1390 lower);
1391 else {
1392 if (upper > 0) {
1393 debug("address %08x:%08x exceeds addressable space\n",
1394 upper, lower);
1395 return -FDT_ERR_BADVALUE;
1396 }
1397
1398 snprintf(name, sizeof(name), "%s@%x", basename, lower);
1399 }
1400
1401 node = fdt_add_subnode(blob, parent, name);
1402 if (node < 0)
1403 return node;
1404
Thierry Redingb9aad372021-09-03 15:16:21 +02001405 if (flags & FDTDEC_RESERVED_MEMORY_NO_MAP) {
1406 err = fdt_setprop(blob, node, "no-map", NULL, 0);
1407 if (err < 0)
1408 return err;
1409 }
1410
Heiko Stuebner357d2ce2019-10-23 16:46:39 +02001411 if (phandlep) {
1412 err = fdt_generate_phandle(blob, &phandle);
1413 if (err < 0)
1414 return err;
Thierry Redingc9222a02019-03-21 19:10:02 +01001415
Heiko Stuebner357d2ce2019-10-23 16:46:39 +02001416 err = fdtdec_set_phandle(blob, node, phandle);
1417 if (err < 0)
1418 return err;
1419 }
Thierry Redingc9222a02019-03-21 19:10:02 +01001420
1421 /* store one or two address cells */
1422 if (na > 1)
1423 *ptr++ = cpu_to_fdt32(upper);
1424
1425 *ptr++ = cpu_to_fdt32(lower);
1426
1427 /* store one or two size cells */
Thierry Reding3bf2f152019-04-15 10:08:21 +02001428 size = carveout->end - carveout->start + 1;
1429 upper = upper_32_bits(size);
1430 lower = lower_32_bits(size);
Thierry Redingc9222a02019-03-21 19:10:02 +01001431
1432 if (ns > 1)
1433 *ptr++ = cpu_to_fdt32(upper);
1434
1435 *ptr++ = cpu_to_fdt32(lower);
1436
1437 err = fdt_setprop(blob, node, "reg", cells, (na + ns) * sizeof(*cells));
1438 if (err < 0)
1439 return err;
1440
Thierry Reding46cb0672021-09-03 15:16:19 +02001441 if (compatibles && count > 0) {
1442 size_t length = 0, len = 0;
1443 unsigned int i;
1444 char *buffer;
1445
1446 for (i = 0; i < count; i++)
1447 length += strlen(compatibles[i]) + 1;
1448
1449 buffer = malloc(length);
1450 if (!buffer)
1451 return -FDT_ERR_INTERNAL;
1452
1453 for (i = 0; i < count; i++)
1454 len += strlcpy(buffer + len, compatibles[i],
1455 length - len) + 1;
1456
1457 err = fdt_setprop(blob, node, "compatible", buffer, length);
1458 free(buffer);
1459 if (err < 0)
1460 return err;
1461 }
1462
Thierry Redingc9222a02019-03-21 19:10:02 +01001463 /* return the phandle for the new node for the caller to use */
1464 if (phandlep)
1465 *phandlep = phandle;
1466
1467 return 0;
1468}
1469
Thierry Reding4bf88ba2021-09-03 15:16:18 +02001470int fdtdec_get_carveout(const void *blob, const char *node,
1471 const char *prop_name, unsigned int index,
Thierry Reding46cb0672021-09-03 15:16:19 +02001472 struct fdt_memory *carveout, const char **name,
Thierry Redingb9aad372021-09-03 15:16:21 +02001473 const char ***compatiblesp, unsigned int *countp,
1474 unsigned long *flags)
Thierry Reding16523ac2019-03-21 19:10:03 +01001475{
1476 const fdt32_t *prop;
1477 uint32_t phandle;
1478 int offset, len;
1479 fdt_size_t size;
1480
1481 offset = fdt_path_offset(blob, node);
1482 if (offset < 0)
1483 return offset;
1484
Thierry Reding4bf88ba2021-09-03 15:16:18 +02001485 prop = fdt_getprop(blob, offset, prop_name, &len);
Thierry Reding16523ac2019-03-21 19:10:03 +01001486 if (!prop) {
Thierry Reding4bf88ba2021-09-03 15:16:18 +02001487 debug("failed to get %s for %s\n", prop_name, node);
Thierry Reding16523ac2019-03-21 19:10:03 +01001488 return -FDT_ERR_NOTFOUND;
1489 }
1490
1491 if ((len % sizeof(phandle)) != 0) {
1492 debug("invalid phandle property\n");
1493 return -FDT_ERR_BADPHANDLE;
1494 }
1495
1496 if (len < (sizeof(phandle) * (index + 1))) {
1497 debug("invalid phandle index\n");
Thierry Redingd5598cf2021-09-03 15:16:17 +02001498 return -FDT_ERR_NOTFOUND;
Thierry Reding16523ac2019-03-21 19:10:03 +01001499 }
1500
1501 phandle = fdt32_to_cpu(prop[index]);
1502
1503 offset = fdt_node_offset_by_phandle(blob, phandle);
1504 if (offset < 0) {
1505 debug("failed to find node for phandle %u\n", phandle);
1506 return offset;
1507 }
1508
Thierry Reding4bf88ba2021-09-03 15:16:18 +02001509 if (name)
1510 *name = fdt_get_name(blob, offset, NULL);
1511
Thierry Reding46cb0672021-09-03 15:16:19 +02001512 if (compatiblesp) {
1513 const char **compatibles = NULL;
1514 const char *start, *end, *ptr;
1515 unsigned int count = 0;
1516
1517 prop = fdt_getprop(blob, offset, "compatible", &len);
1518 if (!prop)
1519 goto skip_compat;
1520
1521 start = ptr = (const char *)prop;
1522 end = start + len;
1523
1524 while (ptr < end) {
1525 ptr = strchrnul(ptr, '\0');
1526 count++;
1527 ptr++;
1528 }
1529
1530 compatibles = malloc(sizeof(ptr) * count);
1531 if (!compatibles)
1532 return -FDT_ERR_INTERNAL;
1533
1534 ptr = start;
1535 count = 0;
1536
1537 while (ptr < end) {
1538 compatibles[count] = ptr;
1539 ptr = strchrnul(ptr, '\0');
1540 count++;
1541 ptr++;
1542 }
1543
1544skip_compat:
1545 *compatiblesp = compatibles;
1546
1547 if (countp)
1548 *countp = count;
1549 }
1550
Thierry Reding16523ac2019-03-21 19:10:03 +01001551 carveout->start = fdtdec_get_addr_size_auto_noparent(blob, offset,
1552 "reg", 0, &size,
1553 true);
1554 if (carveout->start == FDT_ADDR_T_NONE) {
1555 debug("failed to read address/size from \"reg\" property\n");
1556 return -FDT_ERR_NOTFOUND;
1557 }
1558
1559 carveout->end = carveout->start + size - 1;
1560
Thierry Redingb9aad372021-09-03 15:16:21 +02001561 if (flags) {
1562 *flags = 0;
1563
1564 if (fdtdec_get_bool(blob, offset, "no-map"))
1565 *flags |= FDTDEC_RESERVED_MEMORY_NO_MAP;
1566 }
1567
Thierry Reding16523ac2019-03-21 19:10:03 +01001568 return 0;
1569}
1570
1571int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
Thierry Reding90194872021-09-03 15:16:20 +02001572 unsigned int index, const struct fdt_memory *carveout,
1573 const char *name, const char **compatibles,
Thierry Redingb9aad372021-09-03 15:16:21 +02001574 unsigned int count, unsigned long flags)
Thierry Reding16523ac2019-03-21 19:10:03 +01001575{
1576 uint32_t phandle;
Laurentiu Tudorb9200b12020-04-03 13:43:03 +03001577 int err, offset, len;
Thierry Reding16523ac2019-03-21 19:10:03 +01001578 fdt32_t value;
Laurentiu Tudorb9200b12020-04-03 13:43:03 +03001579 void *prop;
Thierry Reding16523ac2019-03-21 19:10:03 +01001580
Thierry Reding46cb0672021-09-03 15:16:19 +02001581 err = fdtdec_add_reserved_memory(blob, name, carveout, compatibles,
Thierry Redingb9aad372021-09-03 15:16:21 +02001582 count, &phandle, flags);
Thierry Reding16523ac2019-03-21 19:10:03 +01001583 if (err < 0) {
1584 debug("failed to add reserved memory: %d\n", err);
1585 return err;
1586 }
1587
1588 offset = fdt_path_offset(blob, node);
1589 if (offset < 0) {
1590 debug("failed to find offset for node %s: %d\n", node, offset);
1591 return offset;
1592 }
1593
1594 value = cpu_to_fdt32(phandle);
1595
Laurentiu Tudorb9200b12020-04-03 13:43:03 +03001596 if (!fdt_getprop(blob, offset, prop_name, &len)) {
1597 if (len == -FDT_ERR_NOTFOUND)
1598 len = 0;
1599 else
1600 return len;
1601 }
1602
1603 if ((index + 1) * sizeof(value) > len) {
1604 err = fdt_setprop_placeholder(blob, offset, prop_name,
1605 (index + 1) * sizeof(value),
1606 &prop);
1607 if (err < 0) {
1608 debug("failed to resize reserved memory property: %s\n",
1609 fdt_strerror(err));
1610 return err;
1611 }
1612 }
1613
1614 err = fdt_setprop_inplace_namelen_partial(blob, offset, prop_name,
1615 strlen(prop_name),
1616 index * sizeof(value),
1617 &value, sizeof(value));
Thierry Reding16523ac2019-03-21 19:10:03 +01001618 if (err < 0) {
Laurentiu Tudorb9200b12020-04-03 13:43:03 +03001619 debug("failed to update %s property for node %s: %s\n",
1620 prop_name, node, fdt_strerror(err));
Thierry Reding16523ac2019-03-21 19:10:03 +01001621 return err;
1622 }
1623
1624 return 0;
1625}
1626
Simon Glass275b4832021-12-16 20:59:35 -07001627/* TODO(sjg@chromium.org): This function should not be weak */
Marek Vasut0e2afc82020-04-11 21:18:59 +02001628__weak int fdtdec_board_setup(const void *fdt_blob)
1629{
1630 return 0;
1631}
1632
Simon Glass3f51f782021-12-16 20:59:24 -07001633/**
1634 * setup_multi_dtb_fit() - locate the correct dtb from a FIT
1635 *
1636 * This supports the CONFIG_MULTI_DTB_FIT feature, looking for the dtb in a
1637 * supplied FIT
1638 *
1639 * It accepts the current value of gd->fdt_blob, which points to the FIT, then
1640 * updates that gd->fdt_blob, to point to the chosen dtb so that U-Boot uses the
1641 * correct one
1642 */
1643static void setup_multi_dtb_fit(void)
1644{
Simon Glass3f51f782021-12-16 20:59:24 -07001645 void *blob;
1646
1647 /*
1648 * Try and uncompress the blob.
1649 * Unfortunately there is no way to know how big the input blob really
1650 * is. So let us set the maximum input size arbitrarily high. 16MB
1651 * ought to be more than enough for packed DTBs.
1652 */
1653 if (uncompress_blob(gd->fdt_blob, 0x1000000, &blob) == 0)
1654 gd->fdt_blob = blob;
1655
1656 /*
1657 * Check if blob is a FIT images containings DTBs.
1658 * If so, pick the most relevant
1659 */
1660 blob = locate_dtb_in_fit(gd->fdt_blob);
1661 if (blob) {
Simon Glassb4b6daf2021-12-16 20:59:25 -07001662 gd_set_multi_dtb_fit(gd->fdt_blob);
Simon Glass3f51f782021-12-16 20:59:24 -07001663 gd->fdt_blob = blob;
Simon Glass39605c62021-12-16 20:59:33 -07001664 gd->fdt_src = FDTSRC_FIT;
Simon Glass3f51f782021-12-16 20:59:24 -07001665 }
Simon Glass3f51f782021-12-16 20:59:24 -07001666}
1667
Simon Glass08793612015-02-27 22:06:35 -07001668int fdtdec_setup(void)
Simon Glassb45122f2015-02-27 22:06:34 -07001669{
Simon Glass70fe2382024-01-03 18:49:19 -07001670 int ret = -ENOENT;
Simon Glassba83d852021-12-16 20:59:30 -07001671
Simon Glass70fe2382024-01-03 18:49:19 -07001672 /* If allowing a bloblist, check that first */
1673 if (CONFIG_IS_ENABLED(BLOBLIST)) {
1674 ret = bloblist_maybe_init();
1675 if (!ret) {
1676 gd->fdt_blob = bloblist_find(BLOBLISTT_CONTROL_FDT, 0);
1677 if (gd->fdt_blob) {
1678 gd->fdt_src = FDTSRC_BLOBLIST;
1679 log_debug("Devicetree is in bloblist at %p\n",
1680 gd->fdt_blob);
1681 } else {
1682 log_debug("No FDT found in bloblist\n");
1683 ret = -ENOENT;
1684 }
1685 }
1686 }
1687
1688 /* Otherwise, the devicetree is typically appended to U-Boot */
1689 if (ret) {
1690 if (IS_ENABLED(CONFIG_OF_SEPARATE)) {
1691 gd->fdt_blob = fdt_find_separate();
1692 gd->fdt_src = FDTSRC_SEPARATE;
1693 } else { /* embed dtb in ELF file for testing / development */
1694 gd->fdt_blob = dtb_dt_embedded();
1695 gd->fdt_src = FDTSRC_EMBED;
1696 }
Simon Glass39605c62021-12-16 20:59:33 -07001697 }
Simon Glass98550342021-12-16 20:59:31 -07001698
1699 /* Allow the board to override the fdt address. */
1700 if (IS_ENABLED(CONFIG_OF_BOARD)) {
Simon Glassba83d852021-12-16 20:59:30 -07001701 gd->fdt_blob = board_fdt_blob_setup(&ret);
Simon Glass70fe2382024-01-03 18:49:19 -07001702 if (!ret)
1703 gd->fdt_src = FDTSRC_BOARD;
1704 else if (ret != -EEXIST)
Simon Glassba83d852021-12-16 20:59:30 -07001705 return ret;
Simon Glassba83d852021-12-16 20:59:30 -07001706 }
1707
Simon Glass39605c62021-12-16 20:59:33 -07001708 /* Allow the early environment to override the fdt address */
Simon Glass931511d2021-12-16 20:59:28 -07001709 if (!IS_ENABLED(CONFIG_SPL_BUILD)) {
Simon Glass39605c62021-12-16 20:59:33 -07001710 ulong addr;
1711
1712 addr = env_get_hex("fdtcontroladdr", 0);
1713 if (addr) {
1714 gd->fdt_blob = map_sysmem(addr, 0);
1715 gd->fdt_src = FDTSRC_ENV;
1716 }
Simon Glass931511d2021-12-16 20:59:28 -07001717 }
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001718
Simon Glass3f51f782021-12-16 20:59:24 -07001719 if (CONFIG_IS_ENABLED(MULTI_DTB_FIT))
1720 setup_multi_dtb_fit();
Jean-Jacques Hiblot2f57c952017-09-15 12:57:32 +02001721
Simon Glassec4f3272022-12-21 16:08:20 -07001722 ret = fdtdec_prepare_fdt(gd->fdt_blob);
Marek Vasut0e2afc82020-04-11 21:18:59 +02001723 if (!ret)
1724 ret = fdtdec_board_setup(gd->fdt_blob);
Simon Glassee88ba72022-09-06 20:27:19 -06001725 oftree_reset();
1726
Marek Vasut0e2afc82020-04-11 21:18:59 +02001727 return ret;
Simon Glassb45122f2015-02-27 22:06:34 -07001728}
1729
Jean-Jacques Hiblotf1d2bc92018-12-07 14:50:52 +01001730int fdtdec_resetup(int *rescan)
1731{
1732 void *fdt_blob;
1733
1734 /*
1735 * If the current DTB is part of a compressed FIT image,
1736 * try to locate the best match from the uncompressed
1737 * FIT image stillpresent there. Save the time and space
1738 * required to uncompress it again.
1739 */
Simon Glassb4b6daf2021-12-16 20:59:25 -07001740 if (gd_multi_dtb_fit()) {
1741 fdt_blob = locate_dtb_in_fit(gd_multi_dtb_fit());
Jean-Jacques Hiblotf1d2bc92018-12-07 14:50:52 +01001742
1743 if (fdt_blob == gd->fdt_blob) {
1744 /*
1745 * The best match did not change. no need to tear down
1746 * the DM and rescan the fdt.
1747 */
1748 *rescan = 0;
1749 return 0;
1750 }
1751
1752 *rescan = 1;
1753 gd->fdt_blob = fdt_blob;
Simon Glassec4f3272022-12-21 16:08:20 -07001754 return fdtdec_prepare_fdt(fdt_blob);
Jean-Jacques Hiblotf1d2bc92018-12-07 14:50:52 +01001755 }
1756
1757 /*
1758 * If multi_dtb_fit is NULL, it means that blob appended to u-boot is
1759 * not a FIT image containings DTB, but a single DTB. There is no need
1760 * to teard down DM and rescan the DT in this case.
1761 */
1762 *rescan = 0;
1763 return 0;
1764}
Jean-Jacques Hiblotf1d2bc92018-12-07 14:50:52 +01001765
Michael Pratt90c08fa2018-06-11 13:07:09 -06001766int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
Masahiro Yamadab75d8dc2020-06-26 15:13:33 +09001767 phys_addr_t *basep, phys_size_t *sizep,
1768 struct bd_info *bd)
Michael Pratt90c08fa2018-06-11 13:07:09 -06001769{
1770 int addr_cells, size_cells;
1771 const u32 *cell, *end;
1772 u64 total_size, size, addr;
1773 int node, child;
1774 bool auto_size;
1775 int bank;
1776 int len;
1777
1778 debug("%s: board_id=%d\n", __func__, board_id);
1779 if (!area)
1780 area = "/memory";
1781 node = fdt_path_offset(blob, area);
1782 if (node < 0) {
1783 debug("No %s node found\n", area);
1784 return -ENOENT;
1785 }
1786
1787 cell = fdt_getprop(blob, node, "reg", &len);
1788 if (!cell) {
1789 debug("No reg property found\n");
1790 return -ENOENT;
1791 }
1792
1793 addr_cells = fdt_address_cells(blob, node);
1794 size_cells = fdt_size_cells(blob, node);
1795
1796 /* Check the board id and mask */
1797 for (child = fdt_first_subnode(blob, node);
1798 child >= 0;
1799 child = fdt_next_subnode(blob, child)) {
1800 int match_mask, match_value;
1801
1802 match_mask = fdtdec_get_int(blob, child, "match-mask", -1);
1803 match_value = fdtdec_get_int(blob, child, "match-value", -1);
1804
1805 if (match_value >= 0 &&
1806 ((board_id & match_mask) == match_value)) {
1807 /* Found matching mask */
1808 debug("Found matching mask %d\n", match_mask);
1809 node = child;
1810 cell = fdt_getprop(blob, node, "reg", &len);
1811 if (!cell) {
1812 debug("No memory-banks property found\n");
1813 return -EINVAL;
1814 }
1815 break;
1816 }
1817 }
1818 /* Note: if no matching subnode was found we use the parent node */
1819
1820 if (bd) {
1821 memset(bd->bi_dram, '\0', sizeof(bd->bi_dram[0]) *
1822 CONFIG_NR_DRAM_BANKS);
1823 }
1824
1825 auto_size = fdtdec_get_bool(blob, node, "auto-size");
1826
1827 total_size = 0;
1828 end = cell + len / 4 - addr_cells - size_cells;
1829 debug("cell at %p, end %p\n", cell, end);
1830 for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
1831 if (cell > end)
1832 break;
1833 addr = 0;
1834 if (addr_cells == 2)
1835 addr += (u64)fdt32_to_cpu(*cell++) << 32UL;
1836 addr += fdt32_to_cpu(*cell++);
1837 if (bd)
1838 bd->bi_dram[bank].start = addr;
1839 if (basep && !bank)
1840 *basep = (phys_addr_t)addr;
1841
1842 size = 0;
1843 if (size_cells == 2)
1844 size += (u64)fdt32_to_cpu(*cell++) << 32UL;
1845 size += fdt32_to_cpu(*cell++);
1846
1847 if (auto_size) {
1848 u64 new_size;
1849
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001850 debug("Auto-sizing %llx, size %llx: ", addr, size);
Michael Pratt90c08fa2018-06-11 13:07:09 -06001851 new_size = get_ram_size((long *)(uintptr_t)addr, size);
1852 if (new_size == size) {
1853 debug("OK\n");
1854 } else {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001855 debug("sized to %llx\n", new_size);
Michael Pratt90c08fa2018-06-11 13:07:09 -06001856 size = new_size;
1857 }
1858 }
1859
1860 if (bd)
1861 bd->bi_dram[bank].size = size;
1862 total_size += size;
1863 }
1864
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001865 debug("Memory size %llu\n", total_size);
Michael Pratt90c08fa2018-06-11 13:07:09 -06001866 if (sizep)
1867 *sizep = (phys_size_t)total_size;
1868
1869 return 0;
1870}
Michael Pratt90c08fa2018-06-11 13:07:09 -06001871
Simon Glassb45122f2015-02-27 22:06:34 -07001872#endif /* !USE_HOSTCC */