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Commit | Line | Data |
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b5220bc6 SG |
1 | /* |
2 | * Copyright (c) 2011 The Chromium OS Authors. | |
1a459660 | 3 | * SPDX-License-Identifier: GPL-2.0+ |
b5220bc6 SG |
4 | */ |
5 | ||
29a23f9d | 6 | #ifndef USE_HOSTCC |
b5220bc6 | 7 | #include <common.h> |
5c33c9fd | 8 | #include <errno.h> |
b5220bc6 SG |
9 | #include <serial.h> |
10 | #include <libfdt.h> | |
11 | #include <fdtdec.h> | |
5c33c9fd | 12 | #include <linux/ctype.h> |
b5220bc6 | 13 | |
e46431e1 | 14 | #include <asm/gpio.h> |
ed3ee5cd | 15 | |
b5220bc6 SG |
16 | DECLARE_GLOBAL_DATA_PTR; |
17 | ||
18 | /* | |
19 | * Here are the type we know about. One day we might allow drivers to | |
20 | * register. For now we just put them here. The COMPAT macro allows us to | |
21 | * turn this into a sparse list later, and keeps the ID with the name. | |
22 | */ | |
23 | #define COMPAT(id, name) name | |
24 | static const char * const compat_names[COMPAT_COUNT] = { | |
f88fe2de | 25 | COMPAT(UNKNOWN, "<none>"), |
87f938c9 | 26 | COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), |
7e44d932 JL |
27 | COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), |
28 | COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), | |
e32624ef | 29 | COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"), |
96a78ac0 YL |
30 | COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"), |
31 | COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"), | |
0e35ad05 JZ |
32 | COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), |
33 | COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), | |
6642a681 | 34 | COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), |
312693c3 | 35 | COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), |
e1ae0d1f | 36 | COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), |
87540de3 | 37 | COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), |
a73ca478 | 38 | COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), |
f4e4e0b0 | 39 | COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), |
c9aa831e | 40 | COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), |
8f1b46b1 | 41 | COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"), |
b19f5749 | 42 | COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"), |
c3bb3c8b | 43 | COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"), |
f315828b TR |
44 | COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), |
45 | COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), | |
46 | COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), | |
79c7a90f | 47 | COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), |
cc9fe33a HR |
48 | COMPAT(SMSC_LAN9215, "smsc,lan9215"), |
49 | COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), | |
c34253d1 | 50 | COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |
72dbff12 RS |
51 | COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), |
52 | COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), | |
5d50659d | 53 | COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"), |
88364387 | 54 | COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), |
713cb680 | 55 | COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), |
6abd1620 | 56 | COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), |
108b85be | 57 | COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), |
6abd1620 | 58 | COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), |
108b85be | 59 | COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), |
618766c0 | 60 | COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), |
d7377b51 | 61 | COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), |
de461c52 | 62 | COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), |
1e4706a7 | 63 | COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), |
7d3ca0f8 | 64 | COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), |
3577fe8b | 65 | COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), |
ee1e3c2f | 66 | COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), |
cd577e2b | 67 | COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), |
bb8215f4 | 68 | COMPAT(GENERIC_SPI_FLASH, "spi-flash"), |
7772bb78 | 69 | COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), |
f6267998 | 70 | COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), |
ec34fa5e | 71 | COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), |
ecbd7e1e | 72 | COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), |
df93d90a | 73 | COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), |
7d95f2a3 | 74 | COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), |
ac1058fd | 75 | COMPAT(TI_TPS65090, "ti,tps65090"), |
a9cf6da9 | 76 | COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), |
45c480c9 | 77 | COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), |
9e8f664e | 78 | COMPAT(PARADE_PS8625, "parade,ps8625"), |
ca42d3f7 | 79 | COMPAT(COMPAT_INTEL_LPC, "intel,lpc"), |
77f9b1fb | 80 | COMPAT(INTEL_MICROCODE, "intel,microcode"), |
65dd74a6 | 81 | COMPAT(MEMORY_SPD, "memory-spd"), |
3ac83935 | 82 | COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), |
bb80be39 | 83 | COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), |
effcf067 | 84 | COMPAT(INTEL_GMA, "intel,gma"), |
6173c45b | 85 | COMPAT(AMS_AS3722, "ams,as3722"), |
5da38086 | 86 | COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), |
b5220bc6 SG |
87 | }; |
88 | ||
a53f4a29 SG |
89 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
90 | { | |
91 | /* We allow reading of the 'unknown' ID for testing purposes */ | |
92 | assert(id >= 0 && id < COMPAT_COUNT); | |
93 | return compat_names[id]; | |
94 | } | |
95 | ||
4397a2a8 SG |
96 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
97 | const char *prop_name, fdt_size_t *sizep) | |
b5220bc6 SG |
98 | { |
99 | const fdt_addr_t *cell; | |
100 | int len; | |
101 | ||
1cb2323b | 102 | debug("%s: %s: ", __func__, prop_name); |
b5220bc6 | 103 | cell = fdt_getprop(blob, node, prop_name, &len); |
4397a2a8 SG |
104 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
105 | len == sizeof(fdt_addr_t) * 2)) { | |
1cb2323b | 106 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
4397a2a8 SG |
107 | if (sizep) { |
108 | const fdt_size_t *size; | |
1cb2323b | 109 | |
4397a2a8 SG |
110 | size = (fdt_size_t *)((char *)cell + |
111 | sizeof(fdt_addr_t)); | |
112 | *sizep = fdt_size_to_cpu(*size); | |
370b6c5c SG |
113 | debug("addr=%08lx, size=%08x\n", |
114 | (ulong)addr, *sizep); | |
4397a2a8 | 115 | } else { |
370b6c5c | 116 | debug("%08lx\n", (ulong)addr); |
4397a2a8 | 117 | } |
1cb2323b SG |
118 | return addr; |
119 | } | |
120 | debug("(not found)\n"); | |
b5220bc6 SG |
121 | return FDT_ADDR_T_NONE; |
122 | } | |
123 | ||
4397a2a8 SG |
124 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
125 | const char *prop_name) | |
126 | { | |
127 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); | |
128 | } | |
129 | ||
a62e84d7 BM |
130 | #ifdef CONFIG_PCI |
131 | int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, | |
132 | const char *prop_name, struct fdt_pci_addr *addr) | |
133 | { | |
134 | const u32 *cell; | |
135 | int len; | |
136 | int ret = -ENOENT; | |
137 | ||
138 | debug("%s: %s: ", __func__, prop_name); | |
139 | ||
140 | /* | |
141 | * If we follow the pci bus bindings strictly, we should check | |
142 | * the value of the node's parent node's #address-cells and | |
143 | * #size-cells. They need to be 3 and 2 accordingly. However, | |
144 | * for simplicity we skip the check here. | |
145 | */ | |
146 | cell = fdt_getprop(blob, node, prop_name, &len); | |
147 | if (!cell) | |
148 | goto fail; | |
149 | ||
150 | if ((len % FDT_PCI_REG_SIZE) == 0) { | |
151 | int num = len / FDT_PCI_REG_SIZE; | |
152 | int i; | |
153 | ||
154 | for (i = 0; i < num; i++) { | |
155 | debug("pci address #%d: %08lx %08lx %08lx\n", i, | |
156 | (ulong)fdt_addr_to_cpu(cell[0]), | |
157 | (ulong)fdt_addr_to_cpu(cell[1]), | |
158 | (ulong)fdt_addr_to_cpu(cell[2])); | |
159 | if ((fdt_addr_to_cpu(*cell) & type) == type) { | |
160 | addr->phys_hi = fdt_addr_to_cpu(cell[0]); | |
161 | addr->phys_mid = fdt_addr_to_cpu(cell[1]); | |
162 | addr->phys_lo = fdt_addr_to_cpu(cell[2]); | |
163 | break; | |
164 | } else { | |
165 | cell += (FDT_PCI_ADDR_CELLS + | |
166 | FDT_PCI_SIZE_CELLS); | |
167 | } | |
168 | } | |
169 | ||
170 | if (i == num) | |
171 | goto fail; | |
172 | ||
173 | return 0; | |
174 | } else { | |
175 | ret = -EINVAL; | |
176 | } | |
177 | ||
178 | fail: | |
179 | debug("(not found)\n"); | |
180 | return ret; | |
181 | } | |
182 | ||
183 | int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) | |
184 | { | |
185 | const char *list, *end; | |
186 | int len; | |
187 | ||
188 | list = fdt_getprop(blob, node, "compatible", &len); | |
189 | if (!list) | |
190 | return -ENOENT; | |
191 | ||
192 | end = list + len; | |
193 | while (list < end) { | |
194 | char *s; | |
195 | ||
196 | len = strlen(list); | |
197 | if (len >= strlen("pciVVVV,DDDD")) { | |
198 | s = strstr(list, "pci"); | |
199 | ||
200 | /* | |
201 | * check if the string is something like pciVVVV,DDDD.RR | |
202 | * or just pciVVVV,DDDD | |
203 | */ | |
204 | if (s && s[7] == ',' && | |
205 | (s[12] == '.' || s[12] == 0)) { | |
206 | s += 3; | |
207 | *vendor = simple_strtol(s, NULL, 16); | |
208 | ||
209 | s += 5; | |
210 | *device = simple_strtol(s, NULL, 16); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | } else { | |
215 | list += (len + 1); | |
216 | } | |
217 | } | |
218 | ||
219 | return -ENOENT; | |
220 | } | |
221 | ||
222 | int fdtdec_get_pci_bdf(const void *blob, int node, | |
223 | struct fdt_pci_addr *addr, pci_dev_t *bdf) | |
224 | { | |
225 | u16 dt_vendor, dt_device, vendor, device; | |
226 | int ret; | |
227 | ||
228 | /* get vendor id & device id from the compatible string */ | |
229 | ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); | |
230 | if (ret) | |
231 | return ret; | |
232 | ||
233 | /* extract the bdf from fdt_pci_addr */ | |
234 | *bdf = addr->phys_hi & 0xffff00; | |
235 | ||
236 | /* read vendor id & device id based on bdf */ | |
237 | pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); | |
238 | pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); | |
239 | ||
240 | /* | |
241 | * Note there are two places in the device tree to fully describe | |
242 | * a pci device: one is via compatible string with a format of | |
243 | * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in | |
244 | * the device node's reg address property. We read the vendor id | |
245 | * and device id based on bdf and compare the values with the | |
246 | * "VVVV,DDDD". If they are the same, then we are good to use bdf | |
247 | * to read device's bar. But if they are different, we have to rely | |
248 | * on the vendor id and device id extracted from the compatible | |
249 | * string and locate the real bdf by pci_find_device(). This is | |
250 | * because normally we may only know device's device number and | |
251 | * function number when writing device tree. The bus number is | |
252 | * dynamically assigned during the pci enumeration process. | |
253 | */ | |
254 | if ((dt_vendor != vendor) || (dt_device != device)) { | |
255 | *bdf = pci_find_device(dt_vendor, dt_device, 0); | |
256 | if (*bdf == -1) | |
257 | return -ENODEV; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | int fdtdec_get_pci_bar32(const void *blob, int node, | |
264 | struct fdt_pci_addr *addr, u32 *bar) | |
265 | { | |
266 | pci_dev_t bdf; | |
267 | int barnum; | |
268 | int ret; | |
269 | ||
270 | /* get pci devices's bdf */ | |
271 | ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); | |
272 | if (ret) | |
273 | return ret; | |
274 | ||
275 | /* extract the bar number from fdt_pci_addr */ | |
276 | barnum = addr->phys_hi & 0xff; | |
277 | if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) | |
278 | return -EINVAL; | |
279 | ||
280 | barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; | |
281 | *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | #endif | |
286 | ||
aadef0a1 CLC |
287 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
288 | uint64_t default_val) | |
289 | { | |
290 | const uint64_t *cell64; | |
291 | int length; | |
292 | ||
293 | cell64 = fdt_getprop(blob, node, prop_name, &length); | |
294 | if (!cell64 || length < sizeof(*cell64)) | |
295 | return default_val; | |
296 | ||
297 | return fdt64_to_cpu(*cell64); | |
298 | } | |
299 | ||
f88fe2de | 300 | int fdtdec_get_is_enabled(const void *blob, int node) |
b5220bc6 SG |
301 | { |
302 | const char *cell; | |
303 | ||
f88fe2de SG |
304 | /* |
305 | * It should say "okay", so only allow that. Some fdts use "ok" but | |
306 | * this is a bug. Please fix your device tree source file. See here | |
307 | * for discussion: | |
308 | * | |
309 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html | |
310 | */ | |
b5220bc6 SG |
311 | cell = fdt_getprop(blob, node, "status", NULL); |
312 | if (cell) | |
f88fe2de SG |
313 | return 0 == strcmp(cell, "okay"); |
314 | return 1; | |
b5220bc6 SG |
315 | } |
316 | ||
7cde397b | 317 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
b5220bc6 SG |
318 | { |
319 | enum fdt_compat_id id; | |
320 | ||
321 | /* Search our drivers */ | |
322 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) | |
323 | if (0 == fdt_node_check_compatible(blob, node, | |
324 | compat_names[id])) | |
325 | return id; | |
326 | return COMPAT_UNKNOWN; | |
327 | } | |
328 | ||
329 | int fdtdec_next_compatible(const void *blob, int node, | |
330 | enum fdt_compat_id id) | |
331 | { | |
332 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); | |
333 | } | |
334 | ||
3ddecfc7 SG |
335 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
336 | enum fdt_compat_id id, int *depthp) | |
337 | { | |
338 | do { | |
339 | node = fdt_next_node(blob, node, depthp); | |
340 | } while (*depthp > 1); | |
341 | ||
342 | /* If this is a direct subnode, and compatible, return it */ | |
343 | if (*depthp == 1 && 0 == fdt_node_check_compatible( | |
344 | blob, node, compat_names[id])) | |
345 | return node; | |
346 | ||
347 | return -FDT_ERR_NOTFOUND; | |
348 | } | |
349 | ||
b5220bc6 SG |
350 | int fdtdec_next_alias(const void *blob, const char *name, |
351 | enum fdt_compat_id id, int *upto) | |
352 | { | |
353 | #define MAX_STR_LEN 20 | |
354 | char str[MAX_STR_LEN + 20]; | |
355 | int node, err; | |
356 | ||
357 | /* snprintf() is not available */ | |
358 | assert(strlen(name) < MAX_STR_LEN); | |
359 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); | |
00878476 | 360 | node = fdt_path_offset(blob, str); |
b5220bc6 SG |
361 | if (node < 0) |
362 | return node; | |
363 | err = fdt_node_check_compatible(blob, node, compat_names[id]); | |
364 | if (err < 0) | |
365 | return err; | |
f88fe2de SG |
366 | if (err) |
367 | return -FDT_ERR_NOTFOUND; | |
368 | (*upto)++; | |
369 | return node; | |
b5220bc6 SG |
370 | } |
371 | ||
a53f4a29 SG |
372 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
373 | enum fdt_compat_id id, int *node_list, int maxcount) | |
c6782270 SG |
374 | { |
375 | memset(node_list, '\0', sizeof(*node_list) * maxcount); | |
376 | ||
377 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); | |
378 | } | |
379 | ||
380 | /* TODO: Can we tighten this code up a little? */ | |
381 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, | |
382 | enum fdt_compat_id id, int *node_list, int maxcount) | |
a53f4a29 SG |
383 | { |
384 | int name_len = strlen(name); | |
385 | int nodes[maxcount]; | |
386 | int num_found = 0; | |
387 | int offset, node; | |
388 | int alias_node; | |
389 | int count; | |
390 | int i, j; | |
391 | ||
392 | /* find the alias node if present */ | |
393 | alias_node = fdt_path_offset(blob, "/aliases"); | |
394 | ||
395 | /* | |
396 | * start with nothing, and we can assume that the root node can't | |
397 | * match | |
398 | */ | |
399 | memset(nodes, '\0', sizeof(nodes)); | |
400 | ||
401 | /* First find all the compatible nodes */ | |
402 | for (node = count = 0; node >= 0 && count < maxcount;) { | |
403 | node = fdtdec_next_compatible(blob, node, id); | |
404 | if (node >= 0) | |
405 | nodes[count++] = node; | |
406 | } | |
407 | if (node >= 0) | |
408 | debug("%s: warning: maxcount exceeded with alias '%s'\n", | |
409 | __func__, name); | |
410 | ||
411 | /* Now find all the aliases */ | |
a53f4a29 SG |
412 | for (offset = fdt_first_property_offset(blob, alias_node); |
413 | offset > 0; | |
414 | offset = fdt_next_property_offset(blob, offset)) { | |
415 | const struct fdt_property *prop; | |
416 | const char *path; | |
417 | int number; | |
418 | int found; | |
419 | ||
420 | node = 0; | |
421 | prop = fdt_get_property_by_offset(blob, offset, NULL); | |
422 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
423 | if (prop->len && 0 == strncmp(path, name, name_len)) | |
424 | node = fdt_path_offset(blob, prop->data); | |
425 | if (node <= 0) | |
426 | continue; | |
427 | ||
428 | /* Get the alias number */ | |
429 | number = simple_strtoul(path + name_len, NULL, 10); | |
430 | if (number < 0 || number >= maxcount) { | |
431 | debug("%s: warning: alias '%s' is out of range\n", | |
432 | __func__, path); | |
433 | continue; | |
434 | } | |
435 | ||
436 | /* Make sure the node we found is actually in our list! */ | |
437 | found = -1; | |
438 | for (j = 0; j < count; j++) | |
439 | if (nodes[j] == node) { | |
440 | found = j; | |
441 | break; | |
442 | } | |
443 | ||
444 | if (found == -1) { | |
445 | debug("%s: warning: alias '%s' points to a node " | |
446 | "'%s' that is missing or is not compatible " | |
447 | " with '%s'\n", __func__, path, | |
448 | fdt_get_name(blob, node, NULL), | |
449 | compat_names[id]); | |
450 | continue; | |
451 | } | |
452 | ||
453 | /* | |
454 | * Add this node to our list in the right place, and mark | |
455 | * it as done. | |
456 | */ | |
457 | if (fdtdec_get_is_enabled(blob, node)) { | |
c6782270 SG |
458 | if (node_list[number]) { |
459 | debug("%s: warning: alias '%s' requires that " | |
460 | "a node be placed in the list in a " | |
461 | "position which is already filled by " | |
462 | "node '%s'\n", __func__, path, | |
463 | fdt_get_name(blob, node, NULL)); | |
464 | continue; | |
465 | } | |
a53f4a29 SG |
466 | node_list[number] = node; |
467 | if (number >= num_found) | |
468 | num_found = number + 1; | |
469 | } | |
c6782270 | 470 | nodes[found] = 0; |
a53f4a29 SG |
471 | } |
472 | ||
473 | /* Add any nodes not mentioned by an alias */ | |
474 | for (i = j = 0; i < maxcount; i++) { | |
475 | if (!node_list[i]) { | |
476 | for (; j < maxcount; j++) | |
477 | if (nodes[j] && | |
478 | fdtdec_get_is_enabled(blob, nodes[j])) | |
479 | break; | |
480 | ||
481 | /* Have we run out of nodes to add? */ | |
482 | if (j == maxcount) | |
483 | break; | |
484 | ||
485 | assert(!node_list[i]); | |
486 | node_list[i] = nodes[j++]; | |
487 | if (i >= num_found) | |
488 | num_found = i + 1; | |
489 | } | |
490 | } | |
491 | ||
492 | return num_found; | |
493 | } | |
494 | ||
5c33c9fd SG |
495 | int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, |
496 | int *seqp) | |
497 | { | |
498 | int base_len = strlen(base); | |
499 | const char *find_name; | |
500 | int find_namelen; | |
501 | int prop_offset; | |
502 | int aliases; | |
503 | ||
504 | find_name = fdt_get_name(blob, offset, &find_namelen); | |
505 | debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); | |
506 | ||
507 | aliases = fdt_path_offset(blob, "/aliases"); | |
508 | for (prop_offset = fdt_first_property_offset(blob, aliases); | |
509 | prop_offset > 0; | |
510 | prop_offset = fdt_next_property_offset(blob, prop_offset)) { | |
511 | const char *prop; | |
512 | const char *name; | |
513 | const char *slash; | |
514 | const char *p; | |
515 | int len; | |
516 | ||
517 | prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); | |
518 | debug(" - %s, %s\n", name, prop); | |
519 | if (len < find_namelen || *prop != '/' || prop[len - 1] || | |
520 | strncmp(name, base, base_len)) | |
521 | continue; | |
522 | ||
523 | slash = strrchr(prop, '/'); | |
524 | if (strcmp(slash + 1, find_name)) | |
525 | continue; | |
a88340df SG |
526 | for (p = name + strlen(name) - 1; p > name; p--) { |
527 | if (!isdigit(*p)) { | |
528 | *seqp = simple_strtoul(p + 1, NULL, 10); | |
5c33c9fd SG |
529 | debug("Found seq %d\n", *seqp); |
530 | return 0; | |
531 | } | |
532 | } | |
533 | } | |
534 | ||
535 | debug("Not found\n"); | |
536 | return -ENOENT; | |
537 | } | |
538 | ||
aac07d49 SG |
539 | int fdtdec_get_chosen_node(const void *blob, const char *name) |
540 | { | |
541 | const char *prop; | |
542 | int chosen_node; | |
543 | int len; | |
544 | ||
545 | if (!blob) | |
546 | return -FDT_ERR_NOTFOUND; | |
547 | chosen_node = fdt_path_offset(blob, "/chosen"); | |
548 | prop = fdt_getprop(blob, chosen_node, name, &len); | |
549 | if (!prop) | |
550 | return -FDT_ERR_NOTFOUND; | |
551 | return fdt_path_offset(blob, prop); | |
552 | } | |
553 | ||
9a263e55 SG |
554 | int fdtdec_check_fdt(void) |
555 | { | |
556 | /* | |
557 | * We must have an FDT, but we cannot panic() yet since the console | |
558 | * is not ready. So for now, just assert(). Boards which need an early | |
559 | * FDT (prior to console ready) will need to make their own | |
560 | * arrangements and do their own checks. | |
561 | */ | |
562 | assert(!fdtdec_prepare_fdt()); | |
563 | return 0; | |
564 | } | |
565 | ||
b5220bc6 SG |
566 | /* |
567 | * This function is a little odd in that it accesses global data. At some | |
568 | * point if the architecture board.c files merge this will make more sense. | |
569 | * Even now, it is common code. | |
570 | */ | |
9a263e55 | 571 | int fdtdec_prepare_fdt(void) |
b5220bc6 | 572 | { |
c309c2da SG |
573 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
574 | fdt_check_header(gd->fdt_blob)) { | |
9a263e55 SG |
575 | printf("No valid FDT found - please append one to U-Boot " |
576 | "binary, use u-boot-dtb.bin or define " | |
a733b06b | 577 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
9a263e55 SG |
578 | return -1; |
579 | } | |
b5220bc6 SG |
580 | return 0; |
581 | } | |
d17da655 SG |
582 | |
583 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) | |
584 | { | |
585 | const u32 *phandle; | |
586 | int lookup; | |
587 | ||
1cb2323b | 588 | debug("%s: %s\n", __func__, prop_name); |
d17da655 SG |
589 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
590 | if (!phandle) | |
591 | return -FDT_ERR_NOTFOUND; | |
592 | ||
593 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); | |
594 | return lookup; | |
595 | } | |
596 | ||
597 | /** | |
598 | * Look up a property in a node and check that it has a minimum length. | |
599 | * | |
600 | * @param blob FDT blob | |
601 | * @param node node to examine | |
602 | * @param prop_name name of property to find | |
603 | * @param min_len minimum property length in bytes | |
604 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not | |
605 | found, or -FDT_ERR_BADLAYOUT if not enough data | |
606 | * @return pointer to cell, which is only valid if err == 0 | |
607 | */ | |
608 | static const void *get_prop_check_min_len(const void *blob, int node, | |
609 | const char *prop_name, int min_len, int *err) | |
610 | { | |
611 | const void *cell; | |
612 | int len; | |
613 | ||
614 | debug("%s: %s\n", __func__, prop_name); | |
615 | cell = fdt_getprop(blob, node, prop_name, &len); | |
616 | if (!cell) | |
617 | *err = -FDT_ERR_NOTFOUND; | |
618 | else if (len < min_len) | |
619 | *err = -FDT_ERR_BADLAYOUT; | |
620 | else | |
621 | *err = 0; | |
622 | return cell; | |
623 | } | |
624 | ||
625 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, | |
626 | u32 *array, int count) | |
627 | { | |
628 | const u32 *cell; | |
629 | int i, err = 0; | |
630 | ||
631 | debug("%s: %s\n", __func__, prop_name); | |
632 | cell = get_prop_check_min_len(blob, node, prop_name, | |
633 | sizeof(u32) * count, &err); | |
634 | if (!err) { | |
635 | for (i = 0; i < count; i++) | |
636 | array[i] = fdt32_to_cpu(cell[i]); | |
637 | } | |
638 | return err; | |
639 | } | |
640 | ||
a9f04d49 SG |
641 | int fdtdec_get_int_array_count(const void *blob, int node, |
642 | const char *prop_name, u32 *array, int count) | |
643 | { | |
644 | const u32 *cell; | |
645 | int len, elems; | |
646 | int i; | |
647 | ||
648 | debug("%s: %s\n", __func__, prop_name); | |
649 | cell = fdt_getprop(blob, node, prop_name, &len); | |
650 | if (!cell) | |
651 | return -FDT_ERR_NOTFOUND; | |
652 | elems = len / sizeof(u32); | |
653 | if (count > elems) | |
654 | count = elems; | |
655 | for (i = 0; i < count; i++) | |
656 | array[i] = fdt32_to_cpu(cell[i]); | |
657 | ||
658 | return count; | |
659 | } | |
660 | ||
96875e7d SG |
661 | const u32 *fdtdec_locate_array(const void *blob, int node, |
662 | const char *prop_name, int count) | |
663 | { | |
664 | const u32 *cell; | |
665 | int err; | |
666 | ||
667 | cell = get_prop_check_min_len(blob, node, prop_name, | |
668 | sizeof(u32) * count, &err); | |
669 | return err ? NULL : cell; | |
670 | } | |
671 | ||
d17da655 SG |
672 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
673 | { | |
674 | const s32 *cell; | |
675 | int len; | |
676 | ||
677 | debug("%s: %s\n", __func__, prop_name); | |
678 | cell = fdt_getprop(blob, node, prop_name, &len); | |
679 | return cell != NULL; | |
680 | } | |
ed3ee5cd SG |
681 | |
682 | /** | |
683 | * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no | |
684 | * terminating item. | |
685 | * | |
686 | * @param blob FDT blob to use | |
687 | * @param node Node to look at | |
688 | * @param prop_name Node property name | |
689 | * @param gpio Array of gpio elements to fill from FDT. This will be | |
690 | * untouched if either 0 or an error is returned | |
691 | * @param max_count Maximum number of elements allowed | |
692 | * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would | |
693 | * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing. | |
694 | */ | |
5921f6a2 AK |
695 | int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name, |
696 | struct fdt_gpio_state *gpio, int max_count) | |
ed3ee5cd SG |
697 | { |
698 | const struct fdt_property *prop; | |
699 | const u32 *cell; | |
700 | const char *name; | |
701 | int len, i; | |
702 | ||
703 | debug("%s: %s\n", __func__, prop_name); | |
704 | assert(max_count > 0); | |
705 | prop = fdt_get_property(blob, node, prop_name, &len); | |
706 | if (!prop) { | |
1cb2323b | 707 | debug("%s: property '%s' missing\n", __func__, prop_name); |
ed3ee5cd SG |
708 | return -FDT_ERR_NOTFOUND; |
709 | } | |
710 | ||
711 | /* We will use the name to tag the GPIO */ | |
712 | name = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); | |
713 | cell = (u32 *)prop->data; | |
714 | len /= sizeof(u32) * 3; /* 3 cells per GPIO record */ | |
715 | if (len > max_count) { | |
1cb2323b | 716 | debug(" %s: too many GPIOs / cells for " |
ed3ee5cd SG |
717 | "property '%s'\n", __func__, prop_name); |
718 | return -FDT_ERR_BADLAYOUT; | |
719 | } | |
720 | ||
721 | /* Read out the GPIO data from the cells */ | |
722 | for (i = 0; i < len; i++, cell += 3) { | |
723 | gpio[i].gpio = fdt32_to_cpu(cell[1]); | |
724 | gpio[i].flags = fdt32_to_cpu(cell[2]); | |
725 | gpio[i].name = name; | |
726 | } | |
727 | ||
728 | return len; | |
729 | } | |
730 | ||
731 | int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name, | |
732 | struct fdt_gpio_state *gpio) | |
733 | { | |
734 | int err; | |
735 | ||
736 | debug("%s: %s\n", __func__, prop_name); | |
737 | gpio->gpio = FDT_GPIO_NONE; | |
738 | gpio->name = NULL; | |
739 | err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1); | |
740 | return err == 1 ? 0 : err; | |
741 | } | |
742 | ||
202ff753 SP |
743 | int fdtdec_get_gpio(struct fdt_gpio_state *gpio) |
744 | { | |
745 | int val; | |
746 | ||
747 | if (!fdt_gpio_isvalid(gpio)) | |
748 | return -1; | |
749 | ||
750 | val = gpio_get_value(gpio->gpio); | |
751 | return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
752 | } | |
753 | ||
754 | int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val) | |
755 | { | |
756 | if (!fdt_gpio_isvalid(gpio)) | |
757 | return -1; | |
758 | ||
759 | val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val; | |
760 | return gpio_set_value(gpio->gpio, val); | |
761 | } | |
762 | ||
ed3ee5cd SG |
763 | int fdtdec_setup_gpio(struct fdt_gpio_state *gpio) |
764 | { | |
765 | /* | |
766 | * Return success if there is no GPIO defined. This is used for | |
767 | * optional GPIOs) | |
768 | */ | |
769 | if (!fdt_gpio_isvalid(gpio)) | |
770 | return 0; | |
771 | ||
772 | if (gpio_request(gpio->gpio, gpio->name)) | |
773 | return -1; | |
774 | return 0; | |
775 | } | |
bed4d892 AS |
776 | |
777 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, | |
778 | u8 *array, int count) | |
779 | { | |
780 | const u8 *cell; | |
781 | int err; | |
782 | ||
783 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
784 | if (!err) | |
785 | memcpy(array, cell, count); | |
786 | return err; | |
787 | } | |
788 | ||
789 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, | |
790 | const char *prop_name, int count) | |
791 | { | |
792 | const u8 *cell; | |
793 | int err; | |
794 | ||
795 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); | |
796 | if (err) | |
797 | return NULL; | |
798 | return cell; | |
799 | } | |
09258f1e | 800 | |
09258f1e AK |
801 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
802 | int default_val) | |
803 | { | |
804 | int config_node; | |
805 | ||
806 | debug("%s: %s\n", __func__, prop_name); | |
807 | config_node = fdt_path_offset(blob, "/config"); | |
808 | if (config_node < 0) | |
809 | return default_val; | |
810 | return fdtdec_get_int(blob, config_node, prop_name, default_val); | |
811 | } | |
332ab0d5 | 812 | |
79289c0b GB |
813 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
814 | { | |
815 | int config_node; | |
816 | const void *prop; | |
817 | ||
818 | debug("%s: %s\n", __func__, prop_name); | |
819 | config_node = fdt_path_offset(blob, "/config"); | |
820 | if (config_node < 0) | |
821 | return 0; | |
822 | prop = fdt_get_property(blob, config_node, prop_name, NULL); | |
823 | ||
824 | return prop != NULL; | |
825 | } | |
826 | ||
332ab0d5 SG |
827 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
828 | { | |
829 | const char *nodep; | |
830 | int nodeoffset; | |
831 | int len; | |
832 | ||
833 | debug("%s: %s\n", __func__, prop_name); | |
834 | nodeoffset = fdt_path_offset(blob, "/config"); | |
835 | if (nodeoffset < 0) | |
836 | return NULL; | |
837 | ||
838 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); | |
839 | if (!nodep) | |
840 | return NULL; | |
841 | ||
842 | return (char *)nodep; | |
843 | } | |
f20c4619 | 844 | |
76489832 SG |
845 | int fdtdec_decode_region(const void *blob, int node, const char *prop_name, |
846 | fdt_addr_t *basep, fdt_size_t *sizep) | |
f20c4619 SG |
847 | { |
848 | const fdt_addr_t *cell; | |
849 | int len; | |
850 | ||
76489832 SG |
851 | debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), |
852 | prop_name); | |
f20c4619 | 853 | cell = fdt_getprop(blob, node, prop_name, &len); |
76489832 SG |
854 | if (!cell || (len < sizeof(fdt_addr_t) * 2)) { |
855 | debug("cell=%p, len=%d\n", cell, len); | |
f20c4619 | 856 | return -1; |
76489832 SG |
857 | } |
858 | ||
859 | *basep = fdt_addr_to_cpu(*cell); | |
860 | *sizep = fdt_size_to_cpu(cell[1]); | |
861 | debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, | |
862 | (ulong)*sizep); | |
f20c4619 | 863 | |
f20c4619 SG |
864 | return 0; |
865 | } | |
006e73b9 SG |
866 | |
867 | /** | |
868 | * Read a flash entry from the fdt | |
869 | * | |
870 | * @param blob FDT blob | |
871 | * @param node Offset of node to read | |
872 | * @param name Name of node being read | |
873 | * @param entry Place to put offset and size of this node | |
874 | * @return 0 if ok, -ve on error | |
875 | */ | |
876 | int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, | |
877 | struct fmap_entry *entry) | |
878 | { | |
f3cc44f9 | 879 | const char *prop; |
006e73b9 SG |
880 | u32 reg[2]; |
881 | ||
882 | if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { | |
883 | debug("Node '%s' has bad/missing 'reg' property\n", name); | |
884 | return -FDT_ERR_NOTFOUND; | |
885 | } | |
886 | entry->offset = reg[0]; | |
887 | entry->length = reg[1]; | |
f3cc44f9 SG |
888 | entry->used = fdtdec_get_int(blob, node, "used", entry->length); |
889 | prop = fdt_getprop(blob, node, "compress", NULL); | |
890 | entry->compress_algo = prop && !strcmp(prop, "lzo") ? | |
891 | FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; | |
892 | prop = fdt_getprop(blob, node, "hash", &entry->hash_size); | |
893 | entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; | |
894 | entry->hash = (uint8_t *)prop; | |
006e73b9 SG |
895 | |
896 | return 0; | |
897 | } | |
56f42242 TR |
898 | |
899 | static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) | |
900 | { | |
901 | u64 number = 0; | |
902 | ||
903 | while (cells--) | |
904 | number = (number << 32) | fdt32_to_cpu(*ptr++); | |
905 | ||
906 | return number; | |
907 | } | |
908 | ||
909 | int fdt_get_resource(const void *fdt, int node, const char *property, | |
910 | unsigned int index, struct fdt_resource *res) | |
911 | { | |
912 | const fdt32_t *ptr, *end; | |
913 | int na, ns, len, parent; | |
914 | unsigned int i = 0; | |
915 | ||
916 | parent = fdt_parent_offset(fdt, node); | |
917 | if (parent < 0) | |
918 | return parent; | |
919 | ||
920 | na = fdt_address_cells(fdt, parent); | |
921 | ns = fdt_size_cells(fdt, parent); | |
922 | ||
923 | ptr = fdt_getprop(fdt, node, property, &len); | |
924 | if (!ptr) | |
925 | return len; | |
926 | ||
927 | end = ptr + len / sizeof(*ptr); | |
928 | ||
929 | while (ptr + na + ns <= end) { | |
930 | if (i == index) { | |
931 | res->start = res->end = fdtdec_get_number(ptr, na); | |
932 | res->end += fdtdec_get_number(&ptr[na], ns) - 1; | |
933 | return 0; | |
934 | } | |
935 | ||
936 | ptr += na + ns; | |
937 | i++; | |
938 | } | |
939 | ||
940 | return -FDT_ERR_NOTFOUND; | |
941 | } | |
942 | ||
943 | int fdt_get_named_resource(const void *fdt, int node, const char *property, | |
944 | const char *prop_names, const char *name, | |
945 | struct fdt_resource *res) | |
946 | { | |
947 | int index; | |
948 | ||
949 | index = fdt_find_string(fdt, node, prop_names, name); | |
950 | if (index < 0) | |
951 | return index; | |
952 | ||
953 | return fdt_get_resource(fdt, node, property, index, res); | |
954 | } | |
9f85eee7 | 955 | |
26403871 SG |
956 | int fdtdec_decode_memory_region(const void *blob, int config_node, |
957 | const char *mem_type, const char *suffix, | |
958 | fdt_addr_t *basep, fdt_size_t *sizep) | |
959 | { | |
960 | char prop_name[50]; | |
961 | const char *mem; | |
962 | fdt_size_t size, offset_size; | |
963 | fdt_addr_t base, offset; | |
964 | int node; | |
965 | ||
966 | if (config_node == -1) { | |
967 | config_node = fdt_path_offset(blob, "/config"); | |
968 | if (config_node < 0) { | |
969 | debug("%s: Cannot find /config node\n", __func__); | |
970 | return -ENOENT; | |
971 | } | |
972 | } | |
973 | if (!suffix) | |
974 | suffix = ""; | |
975 | ||
976 | snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, | |
977 | suffix); | |
978 | mem = fdt_getprop(blob, config_node, prop_name, NULL); | |
979 | if (!mem) { | |
980 | debug("%s: No memory type for '%s', using /memory\n", __func__, | |
981 | prop_name); | |
982 | mem = "/memory"; | |
983 | } | |
984 | ||
985 | node = fdt_path_offset(blob, mem); | |
986 | if (node < 0) { | |
987 | debug("%s: Failed to find node '%s': %s\n", __func__, mem, | |
988 | fdt_strerror(node)); | |
989 | return -ENOENT; | |
990 | } | |
991 | ||
992 | /* | |
993 | * Not strictly correct - the memory may have multiple banks. We just | |
994 | * use the first | |
995 | */ | |
996 | if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { | |
997 | debug("%s: Failed to decode memory region %s\n", __func__, | |
998 | mem); | |
999 | return -EINVAL; | |
1000 | } | |
1001 | ||
1002 | snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, | |
1003 | suffix); | |
1004 | if (fdtdec_decode_region(blob, config_node, prop_name, &offset, | |
1005 | &offset_size)) { | |
1006 | debug("%s: Failed to decode memory region '%s'\n", __func__, | |
1007 | prop_name); | |
1008 | return -EINVAL; | |
1009 | } | |
1010 | ||
1011 | *basep = base + offset; | |
1012 | *sizep = offset_size; | |
1013 | ||
1014 | return 0; | |
1015 | } | |
29a23f9d | 1016 | #endif |