1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) Copyright 2012-2016 Stephen Warren
4 */
5
6 #include <common.h>
7 #include <inttypes.h>
8 #include <config.h>
9 #include <dm.h>
10 #include <environment.h>
11 #include <efi_loader.h>
12 #include <fdt_support.h>
13 #include <fdt_simplefb.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 /* From lowlevel_init.S */
32 extern unsigned long fw_dtb_pointer;
33
34 /* TODO(sjg@chromium.org): Move these to the msg.c file */
35 struct msg_get_arm_mem {
36 struct bcm2835_mbox_hdr hdr;
37 struct bcm2835_mbox_tag_get_arm_mem get_arm_mem;
38 u32 end_tag;
39 };
40
41 struct msg_get_board_rev {
42 struct bcm2835_mbox_hdr hdr;
43 struct bcm2835_mbox_tag_get_board_rev get_board_rev;
44 u32 end_tag;
45 };
46
47 struct msg_get_board_serial {
48 struct bcm2835_mbox_hdr hdr;
49 struct bcm2835_mbox_tag_get_board_serial get_board_serial;
50 u32 end_tag;
51 };
52
53 struct msg_get_mac_address {
54 struct bcm2835_mbox_hdr hdr;
55 struct bcm2835_mbox_tag_get_mac_address get_mac_address;
56 u32 end_tag;
57 };
58
59 struct msg_get_clock_rate {
60 struct bcm2835_mbox_hdr hdr;
61 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
62 u32 end_tag;
63 };
64
65 #ifdef CONFIG_ARM64
66 #define DTB_DIR "broadcom/"
67 #else
68 #define DTB_DIR ""
69 #endif
70
71 /*
72 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
73 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
74 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
75 *
76 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
77 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
78 * Foundation stated that the following source was accurate:
79 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
80 */
81 struct rpi_model {
82 const char *name;
83 const char *fdtfile;
84 bool has_onboard_eth;
85 };
86
87 static const struct rpi_model rpi_model_unknown = {
88 "Unknown model",
89 DTB_DIR "bcm283x-rpi-other.dtb",
90 false,
91 };
92
93 static const struct rpi_model rpi_models_new_scheme[] = {
94 [0x0] = {
95 "Model A",
96 DTB_DIR "bcm2835-rpi-a.dtb",
97 false,
98 },
99 [0x1] = {
100 "Model B",
101 DTB_DIR "bcm2835-rpi-b.dtb",
102 true,
103 },
104 [0x2] = {
105 "Model A+",
106 DTB_DIR "bcm2835-rpi-a-plus.dtb",
107 false,
108 },
109 [0x3] = {
110 "Model B+",
111 DTB_DIR "bcm2835-rpi-b-plus.dtb",
112 true,
113 },
114 [0x4] = {
115 "2 Model B",
116 DTB_DIR "bcm2836-rpi-2-b.dtb",
117 true,
118 },
119 [0x6] = {
120 "Compute Module",
121 DTB_DIR "bcm2835-rpi-cm.dtb",
122 false,
123 },
124 [0x8] = {
125 "3 Model B",
126 DTB_DIR "bcm2837-rpi-3-b.dtb",
127 true,
128 },
129 [0x9] = {
130 "Zero",
131 DTB_DIR "bcm2835-rpi-zero.dtb",
132 false,
133 },
134 [0xA] = {
135 "Compute Module 3",
136 DTB_DIR "bcm2837-rpi-cm3.dtb",
137 false,
138 },
139 [0xC] = {
140 "Zero W",
141 DTB_DIR "bcm2835-rpi-zero-w.dtb",
142 false,
143 },
144 [0xD] = {
145 "3 Model B+",
146 DTB_DIR "bcm2837-rpi-3-b-plus.dtb",
147 true,
148 },
149 };
150
151 static const struct rpi_model rpi_models_old_scheme[] = {
152 [0x2] = {
153 "Model B",
154 DTB_DIR "bcm2835-rpi-b.dtb",
155 true,
156 },
157 [0x3] = {
158 "Model B",
159 DTB_DIR "bcm2835-rpi-b.dtb",
160 true,
161 },
162 [0x4] = {
163 "Model B rev2",
164 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
165 true,
166 },
167 [0x5] = {
168 "Model B rev2",
169 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
170 true,
171 },
172 [0x6] = {
173 "Model B rev2",
174 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
175 true,
176 },
177 [0x7] = {
178 "Model A",
179 DTB_DIR "bcm2835-rpi-a.dtb",
180 false,
181 },
182 [0x8] = {
183 "Model A",
184 DTB_DIR "bcm2835-rpi-a.dtb",
185 false,
186 },
187 [0x9] = {
188 "Model A",
189 DTB_DIR "bcm2835-rpi-a.dtb",
190 false,
191 },
192 [0xd] = {
193 "Model B rev2",
194 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
195 true,
196 },
197 [0xe] = {
198 "Model B rev2",
199 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
200 true,
201 },
202 [0xf] = {
203 "Model B rev2",
204 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
205 true,
206 },
207 [0x10] = {
208 "Model B+",
209 DTB_DIR "bcm2835-rpi-b-plus.dtb",
210 true,
211 },
212 [0x11] = {
213 "Compute Module",
214 DTB_DIR "bcm2835-rpi-cm.dtb",
215 false,
216 },
217 [0x12] = {
218 "Model A+",
219 DTB_DIR "bcm2835-rpi-a-plus.dtb",
220 false,
221 },
222 [0x13] = {
223 "Model B+",
224 DTB_DIR "bcm2835-rpi-b-plus.dtb",
225 true,
226 },
227 [0x14] = {
228 "Compute Module",
229 DTB_DIR "bcm2835-rpi-cm.dtb",
230 false,
231 },
232 [0x15] = {
233 "Model A+",
234 DTB_DIR "bcm2835-rpi-a-plus.dtb",
235 false,
236 },
237 };
238
239 static uint32_t revision;
240 static uint32_t rev_scheme;
241 static uint32_t rev_type;
242 static const struct rpi_model *model;
243
244 #ifdef CONFIG_ARM64
245 static struct mm_region bcm2837_mem_map[] = {
246 {
247 .virt = 0x00000000UL,
248 .phys = 0x00000000UL,
249 .size = 0x3f000000UL,
250 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
251 PTE_BLOCK_INNER_SHARE
252 }, {
253 .virt = 0x3f000000UL,
254 .phys = 0x3f000000UL,
255 .size = 0x01000000UL,
256 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
257 PTE_BLOCK_NON_SHARE |
258 PTE_BLOCK_PXN | PTE_BLOCK_UXN
259 }, {
260 /* List terminator */
261 0,
262 }
263 };
264
265 struct mm_region *mem_map = bcm2837_mem_map;
266 #endif
267
dram_init(void)268 int dram_init(void)
269 {
270 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
271 int ret;
272
273 BCM2835_MBOX_INIT_HDR(msg);
274 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
275
276 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
277 if (ret) {
278 printf("bcm2835: Could not query ARM memory size\n");
279 return -1;
280 }
281
282 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
283
284 return 0;
285 }
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), "%016" PRIx64,
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