2 * (C) Copyright 2012-2016 Stephen Warren
4 * SPDX-License-Identifier: GPL-2.0
11 #include <efi_loader.h>
12 #include <fdt_support.h>
13 #include <fdt_simplefb.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>
24 #include <asm/armv8/mmu.h>
28 DECLARE_GLOBAL_DATA_PTR;
30 /* From lowlevel_init.S */
31 extern unsigned long fw_dtb_pointer;
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;
40 struct msg_get_board_rev {
41 struct bcm2835_mbox_hdr hdr;
42 struct bcm2835_mbox_tag_get_board_rev get_board_rev;
46 struct msg_get_board_serial {
47 struct bcm2835_mbox_hdr hdr;
48 struct bcm2835_mbox_tag_get_board_serial get_board_serial;
52 struct msg_get_mac_address {
53 struct bcm2835_mbox_hdr hdr;
54 struct bcm2835_mbox_tag_get_mac_address get_mac_address;
58 struct msg_get_clock_rate {
59 struct bcm2835_mbox_hdr hdr;
60 struct bcm2835_mbox_tag_get_clock_rate get_clock_rate;
65 #define DTB_DIR "broadcom/"
71 * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
72 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
73 * http://git.drogon.net/?p=wiringPi;a=blob;f=wiringPi/wiringPi.c;h=503151f61014418b9c42f4476a6086f75cd4e64b;hb=refs/heads/master#l922
75 * In http://lists.denx.de/pipermail/u-boot/2016-January/243752.html
76 * ("[U-Boot] [PATCH] rpi: fix up Model B entries") Dom Cobley at the RPi
77 * Foundation stated that the following source was accurate:
78 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision
86 static const struct rpi_model rpi_model_unknown = {
88 DTB_DIR "bcm283x-rpi-other.dtb",
92 static const struct rpi_model rpi_models_new_scheme[] = {
95 DTB_DIR "bcm2836-rpi-2-b.dtb",
100 DTB_DIR "bcm2837-rpi-3-b.dtb",
105 DTB_DIR "bcm2835-rpi-zero.dtb",
110 static const struct rpi_model rpi_models_old_scheme[] = {
113 DTB_DIR "bcm2835-rpi-b.dtb",
118 DTB_DIR "bcm2835-rpi-b.dtb",
123 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
128 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
133 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
138 DTB_DIR "bcm2835-rpi-a.dtb",
143 DTB_DIR "bcm2835-rpi-a.dtb",
148 DTB_DIR "bcm2835-rpi-a.dtb",
153 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
158 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
163 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
168 DTB_DIR "bcm2835-rpi-b-plus.dtb",
173 DTB_DIR "bcm2835-rpi-cm.dtb",
178 DTB_DIR "bcm2835-rpi-a-plus.dtb",
183 DTB_DIR "bcm2835-rpi-b-plus.dtb",
188 DTB_DIR "bcm2835-rpi-cm.dtb",
193 DTB_DIR "bcm2835-rpi-a-plus.dtb",
198 static uint32_t revision;
199 static uint32_t rev_scheme;
200 static uint32_t rev_type;
201 static const struct rpi_model *model;
204 static struct mm_region bcm2837_mem_map[] = {
206 .virt = 0x00000000UL,
207 .phys = 0x00000000UL,
208 .size = 0x3f000000UL,
209 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
210 PTE_BLOCK_INNER_SHARE
212 .virt = 0x3f000000UL,
213 .phys = 0x3f000000UL,
214 .size = 0x01000000UL,
215 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
216 PTE_BLOCK_NON_SHARE |
217 PTE_BLOCK_PXN | PTE_BLOCK_UXN
219 /* List terminator */
224 struct mm_region *mem_map = bcm2837_mem_map;
229 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
232 BCM2835_MBOX_INIT_HDR(msg);
233 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
235 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
237 printf("bcm2835: Could not query ARM memory size\n");
241 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
246 static void set_fdtfile(void)
250 if (getenv("fdtfile"))
253 fdtfile = model->fdtfile;
254 env_set("fdtfile", fdtfile);
258 * If the firmware provided a valid FDT at boot time, let's expose it in
259 * ${fdt_addr} so it may be passed unmodified to the kernel.
261 static void set_fdt_addr(void)
263 if (getenv("fdt_addr"))
266 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
269 env_set_hex("fdt_addr", fw_dtb_pointer);
273 * Prevent relocation from stomping on a firmware provided FDT blob.
275 unsigned long board_get_usable_ram_top(unsigned long total_size)
277 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
279 return fw_dtb_pointer & ~0xffff;
282 static void set_usbethaddr(void)
284 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
287 if (!model->has_onboard_eth)
290 if (getenv("usbethaddr"))
293 BCM2835_MBOX_INIT_HDR(msg);
294 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
296 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
298 printf("bcm2835: Could not query MAC address\n");
299 /* Ignore error; not critical */
303 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
305 if (!getenv("ethaddr"))
306 env_set("ethaddr", getenv("usbethaddr"));
311 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
312 static void set_board_info(void)
316 snprintf(s, sizeof(s), "0x%X", revision);
317 env_set("board_revision", s);
318 snprintf(s, sizeof(s), "%d", rev_scheme);
319 env_set("board_rev_scheme", s);
320 /* Can't rename this to board_rev_type since it's an ABI for scripts */
321 snprintf(s, sizeof(s), "0x%X", rev_type);
322 env_set("board_rev", s);
323 env_set("board_name", model->name);
325 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
327 static void set_serial_number(void)
329 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
331 char serial_string[17] = { 0 };
333 if (getenv("serial#"))
336 BCM2835_MBOX_INIT_HDR(msg);
337 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
339 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
341 printf("bcm2835: Could not query board serial\n");
342 /* Ignore error; not critical */
346 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
347 msg->get_board_serial.body.resp.serial);
348 env_set("serial#", serial_string);
351 int misc_init_r(void)
356 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
364 static void get_board_rev(void)
366 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
368 const struct rpi_model *models;
369 uint32_t models_count;
371 BCM2835_MBOX_INIT_HDR(msg);
372 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
374 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
376 printf("bcm2835: Could not query board revision\n");
377 /* Ignore error; not critical */
382 * For details of old-vs-new scheme, see:
383 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
384 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
387 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
388 * lower byte to use as the board rev:
389 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
390 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
392 revision = msg->get_board_rev.body.resp.rev;
393 if (revision & 0x800000) {
395 rev_type = (revision >> 4) & 0xff;
396 models = rpi_models_new_scheme;
397 models_count = ARRAY_SIZE(rpi_models_new_scheme);
400 rev_type = revision & 0xff;
401 models = rpi_models_old_scheme;
402 models_count = ARRAY_SIZE(rpi_models_old_scheme);
404 if (rev_type >= models_count) {
405 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
406 model = &rpi_model_unknown;
407 } else if (!models[rev_type].name) {
408 printf("RPI: Board rev 0x%x unknown\n", rev_type);
409 model = &rpi_model_unknown;
411 model = &models[rev_type];
414 printf("RPI %s (0x%x)\n", model->name, revision);
417 #ifndef CONFIG_PL01X_SERIAL
418 static bool rpi_is_serial_active(void)
420 int serial_gpio = 15;
424 * The RPi3 disables the mini uart by default. The easiest way to find
425 * out whether it is available is to check if the RX pin is muxed.
428 if (uclass_first_device(UCLASS_GPIO, &dev) || !dev)
431 if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5)
437 /* Disable mini-UART I/O if it's not pinmuxed to our pins.
438 * The firmware only enables it if explicitly done in config.txt: enable_uart=1
440 static void rpi_disable_inactive_uart(void)
443 struct bcm283x_mu_serial_platdata *plat;
445 if (uclass_get_device_by_driver(UCLASS_SERIAL,
446 DM_GET_DRIVER(serial_bcm283x_mu),
450 if (!rpi_is_serial_active()) {
451 plat = dev_get_platdata(dev);
452 plat->disabled = true;
459 #ifdef CONFIG_HW_WATCHDOG
462 #ifndef CONFIG_PL01X_SERIAL
463 rpi_disable_inactive_uart();
468 gd->bd->bi_boot_params = 0x100;
470 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
474 * If the firmware passed a device tree use it for U-Boot.
476 void *board_fdt_blob_setup(void)
478 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
480 return (void *)fw_dtb_pointer;
483 int ft_board_setup(void *blob, bd_t *bd)
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.
490 lcd_dt_simplefb_add_node(blob);
492 #ifdef CONFIG_EFI_LOADER
493 /* Reserve the spin table */
494 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);