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 [0x10] = {
147 "Compute Module 3+",
148 DTB_DIR "bcm2837-rpi-cm3.dtb",
149 false,
150 },
151 };
152
153 static const struct rpi_model rpi_models_old_scheme[] = {
154 [0x2] = {
155 "Model B",
156 DTB_DIR "bcm2835-rpi-b.dtb",
157 true,
158 },
159 [0x3] = {
160 "Model B",
161 DTB_DIR "bcm2835-rpi-b.dtb",
162 true,
163 },
164 [0x4] = {
165 "Model B rev2",
166 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
167 true,
168 },
169 [0x5] = {
170 "Model B rev2",
171 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
172 true,
173 },
174 [0x6] = {
175 "Model B rev2",
176 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
177 true,
178 },
179 [0x7] = {
180 "Model A",
181 DTB_DIR "bcm2835-rpi-a.dtb",
182 false,
183 },
184 [0x8] = {
185 "Model A",
186 DTB_DIR "bcm2835-rpi-a.dtb",
187 false,
188 },
189 [0x9] = {
190 "Model A",
191 DTB_DIR "bcm2835-rpi-a.dtb",
192 false,
193 },
194 [0xd] = {
195 "Model B rev2",
196 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
197 true,
198 },
199 [0xe] = {
200 "Model B rev2",
201 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
202 true,
203 },
204 [0xf] = {
205 "Model B rev2",
206 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
207 true,
208 },
209 [0x10] = {
210 "Model B+",
211 DTB_DIR "bcm2835-rpi-b-plus.dtb",
212 true,
213 },
214 [0x11] = {
215 "Compute Module",
216 DTB_DIR "bcm2835-rpi-cm.dtb",
217 false,
218 },
219 [0x12] = {
220 "Model A+",
221 DTB_DIR "bcm2835-rpi-a-plus.dtb",
222 false,
223 },
224 [0x13] = {
225 "Model B+",
226 DTB_DIR "bcm2835-rpi-b-plus.dtb",
227 true,
228 },
229 [0x14] = {
230 "Compute Module",
231 DTB_DIR "bcm2835-rpi-cm.dtb",
232 false,
233 },
234 [0x15] = {
235 "Model A+",
236 DTB_DIR "bcm2835-rpi-a-plus.dtb",
237 false,
238 },
239 };
240
241 static uint32_t revision;
242 static uint32_t rev_scheme;
243 static uint32_t rev_type;
244 static const struct rpi_model *model;
245
246 #ifdef CONFIG_ARM64
247 static struct mm_region bcm2837_mem_map[] = {
248 {
249 .virt = 0x00000000UL,
250 .phys = 0x00000000UL,
251 .size = 0x3f000000UL,
252 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
253 PTE_BLOCK_INNER_SHARE
254 }, {
255 .virt = 0x3f000000UL,
256 .phys = 0x3f000000UL,
257 .size = 0x01000000UL,
258 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
259 PTE_BLOCK_NON_SHARE |
260 PTE_BLOCK_PXN | PTE_BLOCK_UXN
261 }, {
262 /* List terminator */
263 0,
264 }
265 };
266
267 struct mm_region *mem_map = bcm2837_mem_map;
268 #endif
269
dram_init(void)270 int dram_init(void)
271 {
272 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
273 int ret;
274
275 BCM2835_MBOX_INIT_HDR(msg);
276 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
277
278 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
279 if (ret) {
280 printf("bcm2835: Could not query ARM memory size\n");
281 return -1;
282 }
283
284 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
285
286 return 0;
287 }
288
set_fdtfile(void)289 static void set_fdtfile(void)
290 {
291 const char *fdtfile;
292
293 if (env_get("fdtfile"))
294 return;
295
296 fdtfile = model->fdtfile;
297 env_set("fdtfile", fdtfile);
298 }
299
300 /*
301 * If the firmware provided a valid FDT at boot time, let's expose it in
302 * ${fdt_addr} so it may be passed unmodified to the kernel.
303 */
set_fdt_addr(void)304 static void set_fdt_addr(void)
305 {
306 if (env_get("fdt_addr"))
307 return;
308
309 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
310 return;
311
312 env_set_hex("fdt_addr", fw_dtb_pointer);
313 }
314
315 /*
316 * Prevent relocation from stomping on a firmware provided FDT blob.
317 */
board_get_usable_ram_top(unsigned long total_size)318 unsigned long board_get_usable_ram_top(unsigned long total_size)
319 {
320 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
321 return gd->ram_top;
322 return fw_dtb_pointer & ~0xffff;
323 }
324
set_usbethaddr(void)325 static void set_usbethaddr(void)
326 {
327 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
328 int ret;
329
330 if (!model->has_onboard_eth)
331 return;
332
333 if (env_get("usbethaddr"))
334 return;
335
336 BCM2835_MBOX_INIT_HDR(msg);
337 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
338
339 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
340 if (ret) {
341 printf("bcm2835: Could not query MAC address\n");
342 /* Ignore error; not critical */
343 return;
344 }
345
346 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
347
348 if (!env_get("ethaddr"))
349 env_set("ethaddr", env_get("usbethaddr"));
350
351 return;
352 }
353
354 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
set_board_info(void)355 static void set_board_info(void)
356 {
357 char s[11];
358
359 snprintf(s, sizeof(s), "0x%X", revision);
360 env_set("board_revision", s);
361 snprintf(s, sizeof(s), "%d", rev_scheme);
362 env_set("board_rev_scheme", s);
363 /* Can't rename this to board_rev_type since it's an ABI for scripts */
364 snprintf(s, sizeof(s), "0x%X", rev_type);
365 env_set("board_rev", s);
366 env_set("board_name", model->name);
367 }
368 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
369
set_serial_number(void)370 static void set_serial_number(void)
371 {
372 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
373 int ret;
374 char serial_string[17] = { 0 };
375
376 if (env_get("serial#"))
377 return;
378
379 BCM2835_MBOX_INIT_HDR(msg);
380 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
381
382 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
383 if (ret) {
384 printf("bcm2835: Could not query board serial\n");
385 /* Ignore error; not critical */
386 return;
387 }
388
389 snprintf(serial_string, sizeof(serial_string), "%016llx",
390 msg->get_board_serial.body.resp.serial);
391 env_set("serial#", serial_string);
392 }
393
misc_init_r(void)394 int misc_init_r(void)
395 {
396 set_fdt_addr();
397 set_fdtfile();
398 set_usbethaddr();
399 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
400 set_board_info();
401 #endif
402 set_serial_number();
403
404 return 0;
405 }
406
get_board_rev(void)407 static void get_board_rev(void)
408 {
409 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
410 int ret;
411 const struct rpi_model *models;
412 uint32_t models_count;
413
414 BCM2835_MBOX_INIT_HDR(msg);
415 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
416
417 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
418 if (ret) {
419 printf("bcm2835: Could not query board revision\n");
420 /* Ignore error; not critical */
421 return;
422 }
423
424 /*
425 * For details of old-vs-new scheme, see:
426 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
427 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
428 * (a few posts down)
429 *
430 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
431 * lower byte to use as the board rev:
432 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
433 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
434 */
435 revision = msg->get_board_rev.body.resp.rev;
436 if (revision & 0x800000) {
437 rev_scheme = 1;
438 rev_type = (revision >> 4) & 0xff;
439 models = rpi_models_new_scheme;
440 models_count = ARRAY_SIZE(rpi_models_new_scheme);
441 } else {
442 rev_scheme = 0;
443 rev_type = revision & 0xff;
444 models = rpi_models_old_scheme;
445 models_count = ARRAY_SIZE(rpi_models_old_scheme);
446 }
447 if (rev_type >= models_count) {
448 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
449 model = &rpi_model_unknown;
450 } else if (!models[rev_type].name) {
451 printf("RPI: Board rev 0x%x unknown\n", rev_type);
452 model = &rpi_model_unknown;
453 } else {
454 model = &models[rev_type];
455 }
456
457 printf("RPI %s (0x%x)\n", model->name, revision);
458 }
459
board_init(void)460 int board_init(void)
461 {
462 #ifdef CONFIG_HW_WATCHDOG
463 hw_watchdog_init();
464 #endif
465
466 get_board_rev();
467
468 gd->bd->bi_boot_params = 0x100;
469
470 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
471 }
472
473 /*
474 * If the firmware passed a device tree use it for U-Boot.
475 */
board_fdt_blob_setup(void)476 void *board_fdt_blob_setup(void)
477 {
478 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
479 return NULL;
480 return (void *)fw_dtb_pointer;
481 }
482
ft_board_setup(void * blob,bd_t * bd)483 int ft_board_setup(void *blob, bd_t *bd)
484 {
485 /*
486 * For now, we simply always add the simplefb DT node. Later, we
487 * should be more intelligent, and e.g. only do this if no enabled DT
488 * node exists for the "real" graphics driver.
489 */
490 lcd_dt_simplefb_add_node(blob);
491
492 #ifdef CONFIG_EFI_LOADER
493 /* Reserve the spin table */
494 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);
495 #endif
496
497 return 0;
498 }
499