1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) Copyright 2012-2016 Stephen Warren
4 */
5
6 #include <common.h>
7 #include <config.h>
8 #include <dm.h>
9 #include <env.h>
10 #include <efi_loader.h>
11 #include <fdt_support.h>
12 #include <fdt_simplefb.h>
13 #include <init.h>
14 #include <lcd.h>
15 #include <memalign.h>
16 #include <mmc.h>
17 #include <asm/gpio.h>
18 #include <asm/arch/mbox.h>
19 #include <asm/arch/msg.h>
20 #include <asm/arch/sdhci.h>
21 #include <asm/global_data.h>
22 #include <dm/platform_data/serial_bcm283x_mu.h>
23 #ifdef CONFIG_ARM64
24 #include <asm/armv8/mmu.h>
25 #endif
26 #include <watchdog.h>
27 #include <dm/pinctrl.h>
28
29 DECLARE_GLOBAL_DATA_PTR;
30
31 /* Assigned in lowlevel_init.S
32 * Push the variable into the .data section so that it
33 * does not get cleared later.
34 */
35 unsigned long __section(".data") fw_dtb_pointer;
36
37 /* TODO(sjg@chromium.org): Move these to the msg.c file */
38 struct msg_get_arm_mem {
39 struct bcm2835_mbox_hdr hdr;
40 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
41 u32 end_tag;
42 };
43
44 struct msg_get_board_rev {
45 struct bcm2835_mbox_hdr hdr;
46 struct bcm2835_mbox_tag_get_board_rev get_board_rev;
47 u32 end_tag;
48 };
49
50 struct msg_get_board_serial {
51 struct bcm2835_mbox_hdr hdr;
52 struct bcm2835_mbox_tag_get_board_serial get_board_serial;
53 u32 end_tag;
54 };
55
56 struct msg_get_mac_address {
57 struct bcm2835_mbox_hdr hdr;
58 struct bcm2835_mbox_tag_get_mac_address get_mac_address;
59 u32 end_tag;
60 };
61
62 struct msg_get_clock_rate {
63 struct bcm2835_mbox_hdr hdr;
64 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
65 u32 end_tag;
66 };
67
68 #ifdef CONFIG_ARM64
69 #define DTB_DIR "broadcom/"
70 #else
71 #define DTB_DIR ""
72 #endif
73
74 /*
75 * https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
76 */
77 struct rpi_model {
78 const char *name;
79 const char *fdtfile;
80 bool has_onboard_eth;
81 };
82
83 static const struct rpi_model rpi_model_unknown = {
84 "Unknown model",
85 DTB_DIR "bcm283x-rpi-other.dtb",
86 false,
87 };
88
89 static const struct rpi_model rpi_models_new_scheme[] = {
90 [0x0] = {
91 "Model A",
92 DTB_DIR "bcm2835-rpi-a.dtb",
93 false,
94 },
95 [0x1] = {
96 "Model B",
97 DTB_DIR "bcm2835-rpi-b.dtb",
98 true,
99 },
100 [0x2] = {
101 "Model A+",
102 DTB_DIR "bcm2835-rpi-a-plus.dtb",
103 false,
104 },
105 [0x3] = {
106 "Model B+",
107 DTB_DIR "bcm2835-rpi-b-plus.dtb",
108 true,
109 },
110 [0x4] = {
111 "2 Model B",
112 DTB_DIR "bcm2836-rpi-2-b.dtb",
113 true,
114 },
115 [0x6] = {
116 "Compute Module",
117 DTB_DIR "bcm2835-rpi-cm.dtb",
118 false,
119 },
120 [0x8] = {
121 "3 Model B",
122 DTB_DIR "bcm2837-rpi-3-b.dtb",
123 true,
124 },
125 [0x9] = {
126 "Zero",
127 DTB_DIR "bcm2835-rpi-zero.dtb",
128 false,
129 },
130 [0xA] = {
131 "Compute Module 3",
132 DTB_DIR "bcm2837-rpi-cm3.dtb",
133 false,
134 },
135 [0xC] = {
136 "Zero W",
137 DTB_DIR "bcm2835-rpi-zero-w.dtb",
138 false,
139 },
140 [0xD] = {
141 "3 Model B+",
142 DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
143 true,
144 },
145 [0xE] = {
146 "3 Model A+",
147 DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
148 false,
149 },
150 [0x10] = {
151 "Compute Module 3+",
152 DTB_DIR "bcm2837-rpi-cm3.dtb",
153 false,
154 },
155 [0x11] = {
156 "4 Model B",
157 DTB_DIR "bcm2711-rpi-4-b.dtb",
158 true,
159 },
160 [0x13] = {
161 "400",
162 DTB_DIR "bcm2711-rpi-400.dtb",
163 true,
164 },
165 [0x14] = {
166 "Compute Module 4",
167 DTB_DIR "bcm2711-rpi-cm4.dtb",
168 true,
169 },
170 };
171
172 static const struct rpi_model rpi_models_old_scheme[] = {
173 [0x2] = {
174 "Model B",
175 DTB_DIR "bcm2835-rpi-b.dtb",
176 true,
177 },
178 [0x3] = {
179 "Model B",
180 DTB_DIR "bcm2835-rpi-b.dtb",
181 true,
182 },
183 [0x4] = {
184 "Model B rev2",
185 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
186 true,
187 },
188 [0x5] = {
189 "Model B rev2",
190 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
191 true,
192 },
193 [0x6] = {
194 "Model B rev2",
195 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
196 true,
197 },
198 [0x7] = {
199 "Model A",
200 DTB_DIR "bcm2835-rpi-a.dtb",
201 false,
202 },
203 [0x8] = {
204 "Model A",
205 DTB_DIR "bcm2835-rpi-a.dtb",
206 false,
207 },
208 [0x9] = {
209 "Model A",
210 DTB_DIR "bcm2835-rpi-a.dtb",
211 false,
212 },
213 [0xd] = {
214 "Model B rev2",
215 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
216 true,
217 },
218 [0xe] = {
219 "Model B rev2",
220 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
221 true,
222 },
223 [0xf] = {
224 "Model B rev2",
225 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
226 true,
227 },
228 [0x10] = {
229 "Model B+",
230 DTB_DIR "bcm2835-rpi-b-plus.dtb",
231 true,
232 },
233 [0x11] = {
234 "Compute Module",
235 DTB_DIR "bcm2835-rpi-cm.dtb",
236 false,
237 },
238 [0x12] = {
239 "Model A+",
240 DTB_DIR "bcm2835-rpi-a-plus.dtb",
241 false,
242 },
243 [0x13] = {
244 "Model B+",
245 DTB_DIR "bcm2835-rpi-b-plus.dtb",
246 true,
247 },
248 [0x14] = {
249 "Compute Module",
250 DTB_DIR "bcm2835-rpi-cm.dtb",
251 false,
252 },
253 [0x15] = {
254 "Model A+",
255 DTB_DIR "bcm2835-rpi-a-plus.dtb",
256 false,
257 },
258 };
259
260 static uint32_t revision;
261 static uint32_t rev_scheme;
262 static uint32_t rev_type;
263 static const struct rpi_model *model;
264
dram_init(void)265 int dram_init(void)
266 {
267 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
268 int ret;
269
270 BCM2835_MBOX_INIT_HDR(msg);
271 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
272
273 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
274 if (ret) {
275 printf("bcm2835: Could not query ARM memory size\n");
276 return -1;
277 }
278
279 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
280
281 /*
282 * In some configurations the memory size returned by VideoCore
283 * is not aligned to the section size, what is mandatory for
284 * the u-boot's memory setup.
285 */
286 gd->ram_size &= ~MMU_SECTION_SIZE;
287
288 return 0;
289 }
290
291 #ifdef CONFIG_OF_BOARD
dram_init_banksize(void)292 int dram_init_banksize(void)
293 {
294 int ret;
295
296 ret = fdtdec_setup_memory_banksize();
297 if (ret)
298 return ret;
299
300 return fdtdec_setup_mem_size_base();
301 }
302 #endif
303
set_fdtfile(void)304 static void set_fdtfile(void)
305 {
306 const char *fdtfile;
307
308 if (env_get("fdtfile"))
309 return;
310
311 fdtfile = model->fdtfile;
312 env_set("fdtfile", fdtfile);
313 }
314
315 /*
316 * If the firmware provided a valid FDT at boot time, let's expose it in
317 * ${fdt_addr} so it may be passed unmodified to the kernel.
318 */
set_fdt_addr(void)319 static void set_fdt_addr(void)
320 {
321 if (env_get("fdt_addr"))
322 return;
323
324 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
325 return;
326
327 env_set_hex("fdt_addr", fw_dtb_pointer);
328 }
329
330 /*
331 * Prevent relocation from stomping on a firmware provided FDT blob.
332 */
board_get_usable_ram_top(unsigned long total_size)333 unsigned long board_get_usable_ram_top(unsigned long total_size)
334 {
335 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
336 return gd->ram_top;
337 return fw_dtb_pointer & ~0xffff;
338 }
339
set_usbethaddr(void)340 static void set_usbethaddr(void)
341 {
342 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
343 int ret;
344
345 if (!model->has_onboard_eth)
346 return;
347
348 if (env_get("usbethaddr"))
349 return;
350
351 BCM2835_MBOX_INIT_HDR(msg);
352 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
353
354 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
355 if (ret) {
356 printf("bcm2835: Could not query MAC address\n");
357 /* Ignore error; not critical */
358 return;
359 }
360
361 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
362
363 if (!env_get("ethaddr"))
364 env_set("ethaddr", env_get("usbethaddr"));
365
366 return;
367 }
368
369 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
set_board_info(void)370 static void set_board_info(void)
371 {
372 char s[11];
373
374 snprintf(s, sizeof(s), "0x%X", revision);
375 env_set("board_revision", s);
376 snprintf(s, sizeof(s), "%d", rev_scheme);
377 env_set("board_rev_scheme", s);
378 /* Can't rename this to board_rev_type since it's an ABI for scripts */
379 snprintf(s, sizeof(s), "0x%X", rev_type);
380 env_set("board_rev", s);
381 env_set("board_name", model->name);
382 }
383 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
384
set_serial_number(void)385 static void set_serial_number(void)
386 {
387 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
388 int ret;
389 char serial_string[17] = { 0 };
390
391 if (env_get("serial#"))
392 return;
393
394 BCM2835_MBOX_INIT_HDR(msg);
395 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
396
397 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
398 if (ret) {
399 printf("bcm2835: Could not query board serial\n");
400 /* Ignore error; not critical */
401 return;
402 }
403
404 snprintf(serial_string, sizeof(serial_string), "%016llx",
405 msg->get_board_serial.body.resp.serial);
406 env_set("serial#", serial_string);
407 }
408
misc_init_r(void)409 int misc_init_r(void)
410 {
411 set_fdt_addr();
412 set_fdtfile();
413 set_usbethaddr();
414 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
415 set_board_info();
416 #endif
417 set_serial_number();
418
419 return 0;
420 }
421
get_board_rev(void)422 static void get_board_rev(void)
423 {
424 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
425 int ret;
426 const struct rpi_model *models;
427 uint32_t models_count;
428
429 BCM2835_MBOX_INIT_HDR(msg);
430 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
431
432 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
433 if (ret) {
434 printf("bcm2835: Could not query board revision\n");
435 /* Ignore error; not critical */
436 return;
437 }
438
439 /*
440 * For details of old-vs-new scheme, see:
441 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
442 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
443 * (a few posts down)
444 *
445 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
446 * lower byte to use as the board rev:
447 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
448 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
449 */
450 revision = msg->get_board_rev.body.resp.rev;
451 if (revision & 0x800000) {
452 rev_scheme = 1;
453 rev_type = (revision >> 4) & 0xff;
454 models = rpi_models_new_scheme;
455 models_count = ARRAY_SIZE(rpi_models_new_scheme);
456 } else {
457 rev_scheme = 0;
458 rev_type = revision & 0xff;
459 models = rpi_models_old_scheme;
460 models_count = ARRAY_SIZE(rpi_models_old_scheme);
461 }
462 if (rev_type >= models_count) {
463 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
464 model = &rpi_model_unknown;
465 } else if (!models[rev_type].name) {
466 printf("RPI: Board rev 0x%x unknown\n", rev_type);
467 model = &rpi_model_unknown;
468 } else {
469 model = &models[rev_type];
470 }
471
472 printf("RPI %s (0x%x)\n", model->name, revision);
473 }
474
board_init(void)475 int board_init(void)
476 {
477 #ifdef CONFIG_HW_WATCHDOG
478 hw_watchdog_init();
479 #endif
480
481 get_board_rev();
482
483 gd->bd->bi_boot_params = 0x100;
484
485 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
486 }
487
488 /*
489 * If the firmware passed a device tree use it for U-Boot.
490 */
board_fdt_blob_setup(void)491 void *board_fdt_blob_setup(void)
492 {
493 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
494 return NULL;
495 return (void *)fw_dtb_pointer;
496 }
497
ft_board_setup(void * blob,struct bd_info * bd)498 int ft_board_setup(void *blob, struct bd_info *bd)
499 {
500 /*
501 * For now, we simply always add the simplefb DT node. Later, we
502 * should be more intelligent, and e.g. only do this if no enabled DT
503 * node exists for the "real" graphics driver.
504 */
505 lcd_dt_simplefb_add_node(blob);
506
507 #ifdef CONFIG_EFI_LOADER
508 /* Reserve the spin table */
509 efi_add_memory_map(0, CONFIG_RPI_EFI_NR_SPIN_PAGES << EFI_PAGE_SHIFT,
510 EFI_RESERVED_MEMORY_TYPE);
511 #endif
512
513 return 0;
514 }
515