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 DTB_DIR "bcm2835-rpi-zero-w.dtb",
115 static const struct rpi_model rpi_models_old_scheme[] = {
118 DTB_DIR "bcm2835-rpi-b.dtb",
123 DTB_DIR "bcm2835-rpi-b.dtb",
128 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
133 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
138 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
143 DTB_DIR "bcm2835-rpi-a.dtb",
148 DTB_DIR "bcm2835-rpi-a.dtb",
153 DTB_DIR "bcm2835-rpi-a.dtb",
158 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
163 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
168 DTB_DIR "bcm2835-rpi-b-rev2.dtb",
173 DTB_DIR "bcm2835-rpi-b-plus.dtb",
178 DTB_DIR "bcm2835-rpi-cm.dtb",
183 DTB_DIR "bcm2835-rpi-a-plus.dtb",
188 DTB_DIR "bcm2835-rpi-b-plus.dtb",
193 DTB_DIR "bcm2835-rpi-cm.dtb",
198 DTB_DIR "bcm2835-rpi-a-plus.dtb",
203 static uint32_t revision;
204 static uint32_t rev_scheme;
205 static uint32_t rev_type;
206 static const struct rpi_model *model;
209 static struct mm_region bcm2837_mem_map[] = {
211 .virt = 0x00000000UL,
212 .phys = 0x00000000UL,
213 .size = 0x3f000000UL,
214 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
215 PTE_BLOCK_INNER_SHARE
217 .virt = 0x3f000000UL,
218 .phys = 0x3f000000UL,
219 .size = 0x01000000UL,
220 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
221 PTE_BLOCK_NON_SHARE |
222 PTE_BLOCK_PXN | PTE_BLOCK_UXN
224 /* List terminator */
229 struct mm_region *mem_map = bcm2837_mem_map;
234 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_arm_mem, msg, 1);
237 BCM2835_MBOX_INIT_HDR(msg);
238 BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY);
240 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
242 printf("bcm2835: Could not query ARM memory size\n");
246 gd->ram_size = msg->get_arm_mem.body.resp.mem_size;
251 static void set_fdtfile(void)
255 if (env_get("fdtfile"))
258 fdtfile = model->fdtfile;
259 env_set("fdtfile", fdtfile);
263 * If the firmware provided a valid FDT at boot time, let's expose it in
264 * ${fdt_addr} so it may be passed unmodified to the kernel.
266 static void set_fdt_addr(void)
268 if (env_get("fdt_addr"))
271 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
274 env_set_hex("fdt_addr", fw_dtb_pointer);
278 * Prevent relocation from stomping on a firmware provided FDT blob.
280 unsigned long board_get_usable_ram_top(unsigned long total_size)
282 if ((gd->ram_top - fw_dtb_pointer) > SZ_64M)
284 return fw_dtb_pointer & ~0xffff;
287 static void set_usbethaddr(void)
289 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1);
292 if (!model->has_onboard_eth)
295 if (env_get("usbethaddr"))
298 BCM2835_MBOX_INIT_HDR(msg);
299 BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
301 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
303 printf("bcm2835: Could not query MAC address\n");
304 /* Ignore error; not critical */
308 eth_env_set_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
310 if (!env_get("ethaddr"))
311 env_set("ethaddr", env_get("usbethaddr"));
316 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
317 static void set_board_info(void)
321 snprintf(s, sizeof(s), "0x%X", revision);
322 env_set("board_revision", s);
323 snprintf(s, sizeof(s), "%d", rev_scheme);
324 env_set("board_rev_scheme", s);
325 /* Can't rename this to board_rev_type since it's an ABI for scripts */
326 snprintf(s, sizeof(s), "0x%X", rev_type);
327 env_set("board_rev", s);
328 env_set("board_name", model->name);
330 #endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
332 static void set_serial_number(void)
334 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
336 char serial_string[17] = { 0 };
338 if (env_get("serial#"))
341 BCM2835_MBOX_INIT_HDR(msg);
342 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
344 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
346 printf("bcm2835: Could not query board serial\n");
347 /* Ignore error; not critical */
351 snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
352 msg->get_board_serial.body.resp.serial);
353 env_set("serial#", serial_string);
356 int misc_init_r(void)
361 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
369 static void get_board_rev(void)
371 ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_rev, msg, 1);
373 const struct rpi_model *models;
374 uint32_t models_count;
376 BCM2835_MBOX_INIT_HDR(msg);
377 BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV);
379 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
381 printf("bcm2835: Could not query board revision\n");
382 /* Ignore error; not critical */
387 * For details of old-vs-new scheme, see:
388 * https://github.com/pimoroni/RPi.version/blob/master/RPi/version.py
389 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=99293&p=690282
392 * For the RPi 1, bit 24 is the "warranty bit", so we mask off just the
393 * lower byte to use as the board rev:
394 * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=98367&start=250
395 * http://www.raspberrypi.org/forums/viewtopic.php?f=31&t=20594
397 revision = msg->get_board_rev.body.resp.rev;
398 if (revision & 0x800000) {
400 rev_type = (revision >> 4) & 0xff;
401 models = rpi_models_new_scheme;
402 models_count = ARRAY_SIZE(rpi_models_new_scheme);
405 rev_type = revision & 0xff;
406 models = rpi_models_old_scheme;
407 models_count = ARRAY_SIZE(rpi_models_old_scheme);
409 if (rev_type >= models_count) {
410 printf("RPI: Board rev 0x%x outside known range\n", rev_type);
411 model = &rpi_model_unknown;
412 } else if (!models[rev_type].name) {
413 printf("RPI: Board rev 0x%x unknown\n", rev_type);
414 model = &rpi_model_unknown;
416 model = &models[rev_type];
419 printf("RPI %s (0x%x)\n", model->name, revision);
422 #ifndef CONFIG_PL01X_SERIAL
423 static bool rpi_is_serial_active(void)
425 int serial_gpio = 15;
429 * The RPi3 disables the mini uart by default. The easiest way to find
430 * out whether it is available is to check if the RX pin is muxed.
433 if (uclass_first_device(UCLASS_GPIO, &dev) || !dev)
436 if (bcm2835_gpio_get_func_id(dev, serial_gpio) != BCM2835_GPIO_ALT5)
442 /* Disable mini-UART I/O if it's not pinmuxed to our pins.
443 * The firmware only enables it if explicitly done in config.txt: enable_uart=1
445 static void rpi_disable_inactive_uart(void)
448 struct bcm283x_mu_serial_platdata *plat;
450 if (uclass_get_device_by_driver(UCLASS_SERIAL,
451 DM_GET_DRIVER(serial_bcm283x_mu),
455 if (!rpi_is_serial_active()) {
456 plat = dev_get_platdata(dev);
457 plat->disabled = true;
464 #ifdef CONFIG_HW_WATCHDOG
467 #ifndef CONFIG_PL01X_SERIAL
468 rpi_disable_inactive_uart();
473 gd->bd->bi_boot_params = 0x100;
475 return bcm2835_power_on_module(BCM2835_MBOX_POWER_DEVID_USB_HCD);
479 * If the firmware passed a device tree use it for U-Boot.
481 void *board_fdt_blob_setup(void)
483 if (fdt_magic(fw_dtb_pointer) != FDT_MAGIC)
485 return (void *)fw_dtb_pointer;
488 int ft_board_setup(void *blob, bd_t *bd)
491 * For now, we simply always add the simplefb DT node. Later, we
492 * should be more intelligent, and e.g. only do this if no enabled DT
493 * node exists for the "real" graphics driver.
495 lcd_dt_simplefb_add_node(blob);
497 #ifdef CONFIG_EFI_LOADER
498 /* Reserve the spin table */
499 efi_add_memory_map(0, 1, EFI_RESERVED_MEMORY_TYPE, 0);