1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2010,2011
4 * NVIDIA Corporation <www.nvidia.com>
14 #include <power/regulator.h>
16 #include <asm/global_data.h>
18 #include <asm/arch-tegra/ap.h>
19 #include <asm/arch-tegra/board.h>
20 #include <asm/arch-tegra/cboot.h>
21 #include <asm/arch-tegra/clk_rst.h>
22 #include <asm/arch-tegra/pmc.h>
23 #include <asm/arch-tegra/pmu.h>
24 #include <asm/arch-tegra/sys_proto.h>
25 #include <asm/arch-tegra/uart.h>
26 #include <asm/arch-tegra/warmboot.h>
27 #include <asm/arch-tegra/gpu.h>
28 #include <asm/arch-tegra/usb.h>
29 #include <asm/arch-tegra/xusb-padctl.h>
30 #ifndef CONFIG_TEGRA186
31 #include <asm/arch-tegra/fuse.h>
32 #include <asm/arch/gp_padctrl.h>
34 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
35 #include <asm/arch/clock.h>
37 #if CONFIG_IS_ENABLED(PINCTRL_TEGRA)
38 #include <asm/arch/funcmux.h>
39 #include <asm/arch/pinmux.h>
41 #include <asm/arch/tegra.h>
42 #ifdef CONFIG_TEGRA_CLOCK_SCALING
43 #include <asm/arch/emc.h>
47 DECLARE_GLOBAL_DATA_PTR;
49 #ifdef CONFIG_SPL_BUILD
51 U_BOOT_DRVINFO(tegra_gpios) = {
56 __weak void pinmux_init(void) {}
57 __weak void pin_mux_usb(void) {}
58 __weak void pin_mux_spi(void) {}
59 __weak void pin_mux_mmc(void) {}
60 __weak void gpio_early_init_uart(void) {}
61 __weak void pin_mux_display(void) {}
62 __weak void start_cpu_fan(void) {}
63 __weak void cboot_late_init(void) {}
64 __weak void nvidia_board_late_init(void) {}
66 #if defined(CONFIG_TEGRA_NAND)
67 __weak void pin_mux_nand(void)
69 funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_DEFAULT);
74 * Routine: power_det_init
75 * Description: turn off power detects
77 static void power_det_init(void)
79 #if defined(CONFIG_TEGRA20)
80 struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
82 /* turn off power detects */
83 writel(0, &pmc->pmc_pwr_det_latch);
84 writel(0, &pmc->pmc_pwr_det);
88 __weak int tegra_board_id(void)
93 #ifdef CONFIG_DISPLAY_BOARDINFO
96 int board_id = tegra_board_id();
98 printf("Board: %s", CFG_TEGRA_BOARD_STRING);
100 printf(", ID: %d\n", board_id);
105 #endif /* CONFIG_DISPLAY_BOARDINFO */
107 __weak int tegra_lcd_pmic_init(int board_it)
112 __weak int nvidia_board_init(void)
118 * Routine: board_init
119 * Description: Early hardware init.
123 __maybe_unused int err;
124 __maybe_unused int board_id;
126 /* Do clocks and UART first so that printf() works */
127 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
134 #ifdef CONFIG_TEGRA_SPI
138 #ifdef CONFIG_MMC_SDHCI_TEGRA
142 /* Init is handled automatically in the driver-model case */
143 #if defined(CONFIG_VIDEO)
146 /* boot param addr */
147 gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
151 #ifdef CONFIG_SYS_I2C_TEGRA
152 # ifdef CONFIG_TEGRA_PMU
153 if (pmu_set_nominal())
154 debug("Failed to select nominal voltages\n");
155 # ifdef CONFIG_TEGRA_CLOCK_SCALING
156 err = board_emc_init();
158 debug("Memory controller init failed: %d\n", err);
160 # endif /* CONFIG_TEGRA_PMU */
161 #endif /* CONFIG_SYS_I2C_TEGRA */
163 #ifdef CONFIG_USB_EHCI_TEGRA
167 #if defined(CONFIG_VIDEO)
168 board_id = tegra_board_id();
169 err = tegra_lcd_pmic_init(board_id);
171 debug("Failed to set up LCD PMIC\n");
176 #ifdef CONFIG_TEGRA_NAND
180 tegra_xusb_padctl_init();
182 #ifdef CONFIG_TEGRA_LP0
183 /* save Sdram params to PMC 2, 4, and 24 for WB0 */
184 warmboot_save_sdram_params();
186 /* prepare the WB code to LP0 location */
187 warmboot_prepare_code(TEGRA_LP0_ADDR, TEGRA_LP0_SIZE);
190 /* Set up boot-on regulators */
191 regulators_enable_boot_on(_DEBUG);
193 return nvidia_board_init();
196 void board_cleanup_before_linux(void)
198 /* power down UPHY PLL */
199 tegra_xusb_padctl_exit();
202 #ifdef CONFIG_BOARD_EARLY_INIT_F
203 static void __gpio_early_init(void)
207 void gpio_early_init(void) __attribute__((weak, alias("__gpio_early_init")));
209 int board_early_init_f(void)
211 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
212 if (!clock_early_init_done())
216 #if defined(CONFIG_TEGRA_DISCONNECT_UDC_ON_BOOT)
217 #define USBCMD_FS2 (1 << 15)
219 struct usb_ctlr *usbctlr = (struct usb_ctlr *)0x7d000000;
220 writel(USBCMD_FS2, &usbctlr->usb_cmd);
224 /* Do any special system timer/TSC setup */
225 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
226 # if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
227 if (!tegra_cpu_is_non_secure())
232 #if defined(CONFIG_DISABLE_SDMMC1_EARLY)
234 * Turn off (reset/disable) SDMMC1 on Nano here, before GPIO INIT.
235 * We do this because earlier bootloaders have enabled power to
236 * SDMMC1 on Nano, and toggling power-gpio (PZ3) in pinmux_init()
237 * results in power being back-driven into the SD-card and SDMMC1
238 * HW, which is 'bad' as per the HW team.
240 * From the HW team: "LDO2 from the PMIC has already been set to 3.3v in
241 * nvtboot/CBoot on Nano (for SD-card boot). So when U-Boot's GPIO_INIT
242 * table sets PZ3 to OUT0 as per the pinmux spreadsheet, it turns off
243 * the loadswitch. When PZ3 is 0 and not driving, essentially the SDCard
244 * voltage turns off. Since the SDCard voltage is no longer there, the
245 * SDMMC CLK/DAT lines are backdriving into what essentially is a
246 * powered-off SDCard, that's why the voltage drops from 3.3V to ~1.6V"
248 * Note that this can probably be removed when we change over to storing
249 * all BL components on QSPI on Nano, and U-Boot then becomes the first
250 * one to turn on SDMMC1 power. Another fix would be to have CBoot
251 * disable power/gate SDMMC1 off before handing off to U-Boot/kernel.
253 reset_set_enable(PERIPH_ID_SDMMC1, 1);
254 clock_set_enable(PERIPH_ID_SDMMC1, 0);
255 #endif /* CONFIG_DISABLE_SDMMC1_EARLY */
260 /* Initialize periph GPIOs */
262 gpio_early_init_uart();
266 #endif /* EARLY_INIT */
268 #ifndef CONFIG_TEGRA186
269 static void nvidia_board_late_init_generic(void)
271 char serialno_str[17];
273 /* Set chip id as serialno */
274 sprintf(serialno_str, "%016llx", tegra_chip_uid());
275 env_set("serial#", serialno_str);
277 switch (tegra_get_chip()) {
279 env_set("platform", "tegra20");
282 env_set("platform", "tegra30");
284 case CHIPID_TEGRA114:
285 env_set("platform", "tegra114");
287 case CHIPID_TEGRA124:
288 env_set("platform", "tegra124");
290 case CHIPID_TEGRA210:
291 env_set("platform", "tegra210");
299 int board_late_init(void)
301 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
302 if (tegra_cpu_is_non_secure()) {
303 printf("CPU is in NS mode\n");
304 env_set("cpu_ns_mode", "1");
306 env_set("cpu_ns_mode", "");
313 * Perform generic env setup in case
314 * vendor does not provide it.
316 #ifndef CONFIG_TEGRA186
317 nvidia_board_late_init_generic();
319 nvidia_board_late_init();
325 * In some SW environments, a memory carve-out exists to house a secure
326 * monitor, a trusted OS, and/or various statically allocated media buffers.
328 * This carveout exists at the highest possible address that is within a
329 * 32-bit physical address space.
331 * This function returns the total size of this carve-out. At present, the
332 * returned value is hard-coded for simplicity. In the future, it may be
333 * possible to determine the carve-out size:
334 * - By querying some run-time information source, such as:
335 * - A structure passed to U-Boot by earlier boot software.
337 * - A call into the secure monitor.
338 * - In the per-board U-Boot configuration header, based on knowledge of the
339 * SW environment that U-Boot is being built for.
341 * For now, we support two configurations in U-Boot:
342 * - 32-bit ports without any form of carve-out.
343 * - 64 bit ports which are assumed to use a carve-out of a conservatively
346 static ulong carveout_size(void)
350 #elif defined(CONFIG_ARMV7_SECURE_RESERVE_SIZE)
351 // BASE+SIZE might not == 4GB. If so, we want the carveout to cover
352 // from BASE to 4GB, not BASE to BASE+SIZE.
353 return (0 - CONFIG_ARMV7_SECURE_BASE) & ~(SZ_2M - 1);
360 * Determine the amount of usable RAM below 4GiB, taking into account any
361 * carve-out that may be assigned.
363 static ulong usable_ram_size_below_4g(void)
365 ulong total_size_below_4g;
366 ulong usable_size_below_4g;
369 * The total size of RAM below 4GiB is the lesser address of:
370 * (a) 2GiB itself (RAM starts at 2GiB, and 4GiB - 2GiB == 2GiB).
371 * (b) The size RAM physically present in the system.
373 if (gd->ram_size < SZ_2G)
374 total_size_below_4g = gd->ram_size;
376 total_size_below_4g = SZ_2G;
378 /* Calculate usable RAM by subtracting out any carve-out size */
379 usable_size_below_4g = total_size_below_4g - carveout_size();
381 return usable_size_below_4g;
385 * Represent all available RAM in either one or two banks.
387 * The first bank describes any usable RAM below 4GiB.
388 * The second bank describes any RAM above 4GiB.
390 * This split is driven by the following requirements:
391 * - The NVIDIA L4T kernel requires separate entries in the DT /memory/reg
392 * property for memory below and above the 4GiB boundary. The layout of that
393 * DT property is directly driven by the entries in the U-Boot bank array.
394 * - The potential existence of a carve-out at the end of RAM below 4GiB can
395 * only be represented using multiple banks.
397 * Explicitly removing the carve-out RAM from the bank entries makes the RAM
398 * layout a bit more obvious, e.g. when running "bdinfo" at the U-Boot
401 * This does mean that the DT U-Boot passes to the Linux kernel will not
402 * include this RAM in /memory/reg at all. An alternative would be to include
403 * all RAM in the U-Boot banks (and hence DT), and add a /memreserve/ node
404 * into DT to stop the kernel from using the RAM. IIUC, I don't /think/ the
405 * Linux kernel will ever need to access any RAM in* the carve-out via a CPU
406 * mapping, so either way is acceptable.
408 * On 32-bit systems, we never define a bank for RAM above 4GiB, since the
409 * start address of that bank cannot be represented in the 32-bit .size
412 int dram_init_banksize(void)
416 /* try to compute DRAM bank size based on cboot DTB first */
417 err = cboot_dram_init_banksize();
421 /* fall back to default DRAM bank size computation */
423 gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
424 gd->bd->bi_dram[0].size = usable_ram_size_below_4g();
427 gd->pci_ram_top = gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size;
430 #ifdef CONFIG_PHYS_64BIT
431 if (gd->ram_size > SZ_2G) {
432 gd->bd->bi_dram[1].start = 0x100000000;
433 gd->bd->bi_dram[1].size = gd->ram_size - SZ_2G;
437 gd->bd->bi_dram[1].start = 0;
438 gd->bd->bi_dram[1].size = 0;
445 * Most hardware on 64-bit Tegra is still restricted to DMA to the lower
446 * 32-bits of the physical address space. Cap the maximum usable RAM area
447 * at 4 GiB to avoid DMA buffers from being allocated beyond the 32-bit
448 * boundary that most devices can address. Also, don't let U-Boot use any
449 * carve-out, as mentioned above.
451 * This function is called before dram_init_banksize(), so we can't simply
452 * return gd->bd->bi_dram[1].start + gd->bd->bi_dram[1].size.
454 phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
458 /* try to get top of usable RAM based on cboot DTB first */
459 ram_top = cboot_get_usable_ram_top(total_size);
463 /* fall back to default usable RAM computation */
465 return CFG_SYS_SDRAM_BASE + usable_ram_size_below_4g();