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 };
161
162 static const struct rpi_model rpi_models_old_scheme[] = {
163 [0x2] = {
164 "Model B",
165 DTB_DIR "bcm2835-rpi-b.dtb",
166 true,
167 },
168 [0x3] = {
169 "Model B",
170 DTB_DIR "bcm2835-rpi-b.dtb",
171 true,
172 },
173 [0x4] = {
174 "Model B rev2",
175 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
176 true,
177 },
178 [0x5] = {
179 "Model B rev2",
180 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
181 true,
182 },
183 [0x6] = {
184 "Model B rev2",
185 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
186 true,
187 },
188 [0x7] = {
189 "Model A",
190 DTB_DIR "bcm2835-rpi-a.dtb",
191 false,
192 },
193 [0x8] = {
194 "Model A",
195 DTB_DIR "bcm2835-rpi-a.dtb",
196 false,
197 },
198 [0x9] = {
199 "Model A",
200 DTB_DIR "bcm2835-rpi-a.dtb",
201 false,
202 },
203 [0xd] = {
204 "Model B rev2",
205 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
206 true,
207 },
208 [0xe] = {
209 "Model B rev2",
210 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
211 true,
212 },
213 [0xf] = {
214 "Model B rev2",
215 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
216 true,
217 },
218 [0x10] = {
219 "Model B+",
220 DTB_DIR "bcm2835-rpi-b-plus.dtb",
221 true,
222 },
223 [0x11] = {
224 "Compute Module",
225 DTB_DIR "bcm2835-rpi-cm.dtb",
226 false,
227 },
228 [0x12] = {
229 "Model A+",
230 DTB_DIR "bcm2835-rpi-a-plus.dtb",
231 false,
232 },
233 [0x13] = {
234 "Model B+",
235 DTB_DIR "bcm2835-rpi-b-plus.dtb",
236 true,
237 },
238 [0x14] = {
239 "Compute Module",
240 DTB_DIR "bcm2835-rpi-cm.dtb",
241 false,
242 },
243 [0x15] = {
244 "Model A+",
245 DTB_DIR "bcm2835-rpi-a-plus.dtb",
246 false,
247 },
248 };
249
250 static uint32_t revision;
251 static uint32_t rev_scheme;
252 static uint32_t rev_type;
253 static const struct rpi_model *model;
254
dram_init(void)255 int dram_init(void)
256 {
257 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
258 int ret;
259
260 BCM2835_MBOX_INIT_HDR(msg);
261 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
262
263 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
264 if (ret) {
265 printf("bcm2835: Could not query ARM memory size\n");
266 return -1;
267 }
268
269 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
270
271 return 0;
272 }
273
274 #ifdef CONFIG_OF_BOARD
dram_init_banksize(void)275 int dram_init_banksize(void)
276 {
277 int ret;
278
279 ret = fdtdec_setup_memory_banksize();
280 if (ret)
281 return ret;
282
283 return fdtdec_setup_mem_size_base();
284 }
285 #endif
286
set_fdtfile(void)287 static void set_fdtfile(void)
288 {
289 const char *fdtfile;
290
291 if (env_get("fdtfile"))
292 return;
293
294 fdtfile = model->fdtfile;
295 env_set("fdtfile", fdtfile);
296 }
297
298 /*
299 * If the firmware provided a valid FDT at boot time, let's expose it in
300 * ${fdt_addr} so it may be passed unmodified to the kernel.
301 */
set_fdt_addr(void)302 static void set_fdt_addr(void)
303 {
304 if (env_get("fdt_addr"))
305 return;
306
307 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
308 return;
309
310 env_set_hex("fdt_addr", fw_dtb_pointer);
311 }
312
313 /*
314 * Prevent relocation from stomping on a firmware provided FDT blob.
315 */
board_get_usable_ram_top(unsigned long total_size)316 unsigned long board_get_usable_ram_top(unsigned long total_size)
317 {
318 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
319 return gd->ram_top;
320 return fw_dtb_pointer & ~0xffff;
321 }
322
set_usbethaddr(void)323 static void set_usbethaddr(void)
324 {
325 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
326 int ret;
327
328 if (!model->has_onboard_eth)
329 return;
330
331 if (env_get("usbethaddr"))
332 return;
333
334 BCM2835_MBOX_INIT_HDR(msg);
335 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
336
337 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
338 if (ret) {
339 printf("bcm2835: Could not query MAC address\n");
340 /* Ignore error; not critical */
341 return;
342 }
343
344 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
345
346 if (!env_get("ethaddr"))
347 env_set("ethaddr", env_get("usbethaddr"));
348
349 return;
350 }
351
352 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
set_board_info(void)353 static void set_board_info(void)
354 {
355 char s[11];
356
357 snprintf(s, sizeof(s), "0x%X", revision);
358 env_set("board_revision", s);
359 snprintf(s, sizeof(s), "%d", rev_scheme);
360 env_set("board_rev_scheme", s);
361 /* Can't rename this to board_rev_type since it's an ABI for scripts */
362 snprintf(s, sizeof(s), "0x%X", rev_type);
363 env_set("board_rev", s);
364 env_set("board_name", model->name);
365 }
366 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
367
set_serial_number(void)368 static void set_serial_number(void)
369 {
370 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
371 int ret;
372 char serial_string[17] = { 0 };
373
374 if (env_get("serial#"))
375 return;
376
377 BCM2835_MBOX_INIT_HDR(msg);
378 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
379
380 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
381 if (ret) {
382 printf("bcm2835: Could not query board serial\n");
383 /* Ignore error; not critical */
384 return;
385 }
386
387 snprintf(serial_string, sizeof(serial_string), "%016llx",
388 msg->get_board_serial.body.resp.serial);
389 env_set("serial#", serial_string);
390 }
391
misc_init_r(void)392 int misc_init_r(void)
393 {
394 set_fdt_addr();
395 set_fdtfile();
396 set_usbethaddr();
397 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
398 set_board_info();
399 #endif
400 set_serial_number();
401
402 return 0;
403 }
404
get_board_rev(void)405 static void get_board_rev(void)
406 {
407 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
408 int ret;
409 const struct rpi_model *models;
410 uint32_t models_count;
411
412 BCM2835_MBOX_INIT_HDR(msg);
413 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
414
415 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
416 if (ret) {
417 printf("bcm2835: Could not query board revision\n");
418 /* Ignore error; not critical */
419 return;
420 }
421
422 /*
423 * For details of old-vs-new scheme, see:
424 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
425 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
426 * (a few posts down)
427 *
428 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
429 * lower byte to use as the board rev:
430 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
431 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
432 */
433 revision = msg->get_board_rev.body.resp.rev;
434 if (revision & 0x800000) {
435 rev_scheme = 1;
436 rev_type = (revision >> 4) & 0xff;
437 models = rpi_models_new_scheme;
438 models_count = ARRAY_SIZE(rpi_models_new_scheme);
439 } else {
440 rev_scheme = 0;
441 rev_type = revision & 0xff;
442 models = rpi_models_old_scheme;
443 models_count = ARRAY_SIZE(rpi_models_old_scheme);
444 }
445 if (rev_type >= models_count) {
446 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
447 model = &rpi_model_unknown;
448 } else if (!models[rev_type].name) {
449 printf("RPI: Board rev 0x%x unknown\n", rev_type);
450 model = &rpi_model_unknown;
451 } else {
452 model = &models[rev_type];
453 }
454
455 printf("RPI %s (0x%x)\n", model->name, revision);
456 }
457
board_init(void)458 int board_init(void)
459 {
460 #ifdef CONFIG_HW_WATCHDOG
461 hw_watchdog_init();
462 #endif
463
464 get_board_rev();
465
466 gd->bd->bi_boot_params = 0x100;
467
468 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
469 }
470
471 /*
472 * If the firmware passed a device tree use it for U-Boot.
473 */
board_fdt_blob_setup(void)474 void *board_fdt_blob_setup(void)
475 {
476 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
477 return NULL;
478 return (void *)fw_dtb_pointer;
479 }
480
ft_board_setup(void * blob,bd_t * bd)481 int ft_board_setup(void *blob, bd_t *bd)
482 {
483 /*
484 * For now, we simply always add the simplefb DT node. Later, we
485 * should be more intelligent, and e.g. only do this if no enabled DT
486 * node exists for the "real" graphics driver.
487 */
488 lcd_dt_simplefb_add_node(blob);
489
490 #ifdef CONFIG_EFI_LOADER
491 /* Reserve the spin table */
492 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
493 #endif
494
495 return 0;
496 }
497