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 <environment.h>
10 #include <efi_loader.h>
11 #include <fdt_support.h>
12 #include <fdt_simplefb.h>
13 #include <lcd.h>
14 #include <memalign.h>
15 #include <mmc.h>
16 #include <asm/gpio.h>
17 #include <asm/arch/mbox.h>
18 #include <asm/arch/msg.h>
19 #include <asm/arch/sdhci.h>
20 #include <asm/global_data.h>
21 #include <dm/platform_data/serial_bcm283x_mu.h>
22 #ifdef CONFIG_ARM64
23 #include <asm/armv8/mmu.h>
24 #endif
25 #include <watchdog.h>
26 #include <dm/pinctrl.h>
27
28 DECLARE_GLOBAL_DATA_PTR;
29
30 /* From lowlevel_init.S */
31 extern unsigned long fw_dtb_pointer;
32
33 /* TODO(sjg@chromium.org): Move these to the msg.c file */
34 struct msg_get_arm_mem {
35 struct bcm2835_mbox_hdr hdr;
36 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
37 u32 end_tag;
38 };
39
40 struct msg_get_board_rev {
41 struct bcm2835_mbox_hdr hdr;
42 struct bcm2835_mbox_tag_get_board_rev get_board_rev;
43 u32 end_tag;
44 };
45
46 struct msg_get_board_serial {
47 struct bcm2835_mbox_hdr hdr;
48 struct bcm2835_mbox_tag_get_board_serial get_board_serial;
49 u32 end_tag;
50 };
51
52 struct msg_get_mac_address {
53 struct bcm2835_mbox_hdr hdr;
54 struct bcm2835_mbox_tag_get_mac_address get_mac_address;
55 u32 end_tag;
56 };
57
58 struct msg_get_clock_rate {
59 struct bcm2835_mbox_hdr hdr;
60 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
61 u32 end_tag;
62 };
63
64 #ifdef CONFIG_ARM64
65 #define DTB_DIR "broadcom/"
66 #else
67 #define DTB_DIR ""
68 #endif
69
70 /*
71 * https://www.raspberrypi.org/documentation/hardware/raspberrypi/revision-codes/README.md
72 */
73 struct rpi_model {
74 const char *name;
75 const char *fdtfile;
76 bool has_onboard_eth;
77 };
78
79 static const struct rpi_model rpi_model_unknown = {
80 "Unknown model",
81 DTB_DIR "bcm283x-rpi-other.dtb",
82 false,
83 };
84
85 static const struct rpi_model rpi_models_new_scheme[] = {
86 [0x0] = {
87 "Model A",
88 DTB_DIR "bcm2835-rpi-a.dtb",
89 false,
90 },
91 [0x1] = {
92 "Model B",
93 DTB_DIR "bcm2835-rpi-b.dtb",
94 true,
95 },
96 [0x2] = {
97 "Model A+",
98 DTB_DIR "bcm2835-rpi-a-plus.dtb",
99 false,
100 },
101 [0x3] = {
102 "Model B+",
103 DTB_DIR "bcm2835-rpi-b-plus.dtb",
104 true,
105 },
106 [0x4] = {
107 "2 Model B",
108 DTB_DIR "bcm2836-rpi-2-b.dtb",
109 true,
110 },
111 [0x6] = {
112 "Compute Module",
113 DTB_DIR "bcm2835-rpi-cm.dtb",
114 false,
115 },
116 [0x8] = {
117 "3 Model B",
118 DTB_DIR "bcm2837-rpi-3-b.dtb",
119 true,
120 },
121 [0x9] = {
122 "Zero",
123 DTB_DIR "bcm2835-rpi-zero.dtb",
124 false,
125 },
126 [0xA] = {
127 "Compute Module 3",
128 DTB_DIR "bcm2837-rpi-cm3.dtb",
129 false,
130 },
131 [0xC] = {
132 "Zero W",
133 DTB_DIR "bcm2835-rpi-zero-w.dtb",
134 false,
135 },
136 [0xD] = {
137 "3 Model B+",
138 DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
139 true,
140 },
141 [0xE] = {
142 "3 Model A+",
143 DTB_DIR "bcm2837-rpi-3-a-plus.dtb",
144 false,
145 },
146 };
147
148 static const struct rpi_model rpi_models_old_scheme[] = {
149 [0x2] = {
150 "Model B",
151 DTB_DIR "bcm2835-rpi-b.dtb",
152 true,
153 },
154 [0x3] = {
155 "Model B",
156 DTB_DIR "bcm2835-rpi-b.dtb",
157 true,
158 },
159 [0x4] = {
160 "Model B rev2",
161 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
162 true,
163 },
164 [0x5] = {
165 "Model B rev2",
166 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
167 true,
168 },
169 [0x6] = {
170 "Model B rev2",
171 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
172 true,
173 },
174 [0x7] = {
175 "Model A",
176 DTB_DIR "bcm2835-rpi-a.dtb",
177 false,
178 },
179 [0x8] = {
180 "Model A",
181 DTB_DIR "bcm2835-rpi-a.dtb",
182 false,
183 },
184 [0x9] = {
185 "Model A",
186 DTB_DIR "bcm2835-rpi-a.dtb",
187 false,
188 },
189 [0xd] = {
190 "Model B rev2",
191 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
192 true,
193 },
194 [0xe] = {
195 "Model B rev2",
196 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
197 true,
198 },
199 [0xf] = {
200 "Model B rev2",
201 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
202 true,
203 },
204 [0x10] = {
205 "Model B+",
206 DTB_DIR "bcm2835-rpi-b-plus.dtb",
207 true,
208 },
209 [0x11] = {
210 "Compute Module",
211 DTB_DIR "bcm2835-rpi-cm.dtb",
212 false,
213 },
214 [0x12] = {
215 "Model A+",
216 DTB_DIR "bcm2835-rpi-a-plus.dtb",
217 false,
218 },
219 [0x13] = {
220 "Model B+",
221 DTB_DIR "bcm2835-rpi-b-plus.dtb",
222 true,
223 },
224 [0x14] = {
225 "Compute Module",
226 DTB_DIR "bcm2835-rpi-cm.dtb",
227 false,
228 },
229 [0x15] = {
230 "Model A+",
231 DTB_DIR "bcm2835-rpi-a-plus.dtb",
232 false,
233 },
234 };
235
236 static uint32_t revision;
237 static uint32_t rev_scheme;
238 static uint32_t rev_type;
239 static const struct rpi_model *model;
240
241 #ifdef CONFIG_ARM64
242 static struct mm_region bcm2837_mem_map[] = {
243 {
244 .virt = 0x00000000UL,
245 .phys = 0x00000000UL,
246 .size = 0x3f000000UL,
247 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
248 PTE_BLOCK_INNER_SHARE
249 }, {
250 .virt = 0x3f000000UL,
251 .phys = 0x3f000000UL,
252 .size = 0x01000000UL,
253 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
254 PTE_BLOCK_NON_SHARE |
255 PTE_BLOCK_PXN | PTE_BLOCK_UXN
256 }, {
257 /* List terminator */
258 0,
259 }
260 };
261
262 struct mm_region *mem_map = bcm2837_mem_map;
263 #endif
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 return 0;
282 }
283
set_fdtfile(void)284 static void set_fdtfile(void)
285 {
286 const char *fdtfile;
287
288 if (env_get("fdtfile"))
289 return;
290
291 fdtfile = model->fdtfile;
292 env_set("fdtfile", fdtfile);
293 }
294
295 /*
296 * If the firmware provided a valid FDT at boot time, let's expose it in
297 * ${fdt_addr} so it may be passed unmodified to the kernel.
298 */
set_fdt_addr(void)299 static void set_fdt_addr(void)
300 {
301 if (env_get("fdt_addr"))
302 return;
303
304 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
305 return;
306
307 env_set_hex("fdt_addr", fw_dtb_pointer);
308 }
309
310 /*
311 * Prevent relocation from stomping on a firmware provided FDT blob.
312 */
board_get_usable_ram_top(unsigned long total_size)313 unsigned long board_get_usable_ram_top(unsigned long total_size)
314 {
315 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
316 return gd->ram_top;
317 return fw_dtb_pointer & ~0xffff;
318 }
319
set_usbethaddr(void)320 static void set_usbethaddr(void)
321 {
322 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
323 int ret;
324
325 if (!model->has_onboard_eth)
326 return;
327
328 if (env_get("usbethaddr"))
329 return;
330
331 BCM2835_MBOX_INIT_HDR(msg);
332 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
333
334 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
335 if (ret) {
336 printf("bcm2835: Could not query MAC address\n");
337 /* Ignore error; not critical */
338 return;
339 }
340
341 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
342
343 if (!env_get("ethaddr"))
344 env_set("ethaddr", env_get("usbethaddr"));
345
346 return;
347 }
348
349 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
set_board_info(void)350 static void set_board_info(void)
351 {
352 char s[11];
353
354 snprintf(s, sizeof(s), "0x%X", revision);
355 env_set("board_revision", s);
356 snprintf(s, sizeof(s), "%d", rev_scheme);
357 env_set("board_rev_scheme", s);
358 /* Can't rename this to board_rev_type since it's an ABI for scripts */
359 snprintf(s, sizeof(s), "0x%X", rev_type);
360 env_set("board_rev", s);
361 env_set("board_name", model->name);
362 }
363 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
364
set_serial_number(void)365 static void set_serial_number(void)
366 {
367 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
368 int ret;
369 char serial_string[17] = { 0 };
370
371 if (env_get("serial#"))
372 return;
373
374 BCM2835_MBOX_INIT_HDR(msg);
375 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
376
377 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
378 if (ret) {
379 printf("bcm2835: Could not query board serial\n");
380 /* Ignore error; not critical */
381 return;
382 }
383
384 snprintf(serial_string, sizeof(serial_string), "%016llx",
385 msg->get_board_serial.body.resp.serial);
386 env_set("serial#", serial_string);
387 }
388
misc_init_r(void)389 int misc_init_r(void)
390 {
391 set_fdt_addr();
392 set_fdtfile();
393 set_usbethaddr();
394 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
395 set_board_info();
396 #endif
397 set_serial_number();
398
399 return 0;
400 }
401
get_board_rev(void)402 static void get_board_rev(void)
403 {
404 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
405 int ret;
406 const struct rpi_model *models;
407 uint32_t models_count;
408
409 BCM2835_MBOX_INIT_HDR(msg);
410 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
411
412 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
413 if (ret) {
414 printf("bcm2835: Could not query board revision\n");
415 /* Ignore error; not critical */
416 return;
417 }
418
419 /*
420 * For details of old-vs-new scheme, see:
421 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
422 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
423 * (a few posts down)
424 *
425 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
426 * lower byte to use as the board rev:
427 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
428 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
429 */
430 revision = msg->get_board_rev.body.resp.rev;
431 if (revision & 0x800000) {
432 rev_scheme = 1;
433 rev_type = (revision >> 4) & 0xff;
434 models = rpi_models_new_scheme;
435 models_count = ARRAY_SIZE(rpi_models_new_scheme);
436 } else {
437 rev_scheme = 0;
438 rev_type = revision & 0xff;
439 models = rpi_models_old_scheme;
440 models_count = ARRAY_SIZE(rpi_models_old_scheme);
441 }
442 if (rev_type >= models_count) {
443 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
444 model = &rpi_model_unknown;
445 } else if (!models[rev_type].name) {
446 printf("RPI: Board rev 0x%x unknown\n", rev_type);
447 model = &rpi_model_unknown;
448 } else {
449 model = &models[rev_type];
450 }
451
452 printf("RPI %s (0x%x)\n", model->name, revision);
453 }
454
board_init(void)455 int board_init(void)
456 {
457 #ifdef CONFIG_HW_WATCHDOG
458 hw_watchdog_init();
459 #endif
460
461 get_board_rev();
462
463 gd->bd->bi_boot_params = 0x100;
464
465 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
466 }
467
468 /*
469 * If the firmware passed a device tree use it for U-Boot.
470 */
board_fdt_blob_setup(void)471 void *board_fdt_blob_setup(void)
472 {
473 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
474 return NULL;
475 return (void *)fw_dtb_pointer;
476 }
477
ft_board_setup(void * blob,bd_t * bd)478 int ft_board_setup(void *blob, bd_t *bd)
479 {
480 /*
481 * For now, we simply always add the simplefb DT node. Later, we
482 * should be more intelligent, and e.g. only do this if no enabled DT
483 * node exists for the "real" graphics driver.
484 */
485 lcd_dt_simplefb_add_node(blob);
486
487 #ifdef CONFIG_EFI_LOADER
488 /* Reserve the spin table */
489 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
490 #endif
491
492 return 0;
493 }
494