1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2010,2011
4 * NVIDIA Corporation <www.nvidia.com>
15 #include <asm/global_data.h>
17 #include <asm/arch-tegra/ap.h>
18 #include <asm/arch-tegra/board.h>
19 #include <asm/arch-tegra/cboot.h>
20 #include <asm/arch-tegra/clk_rst.h>
21 #include <asm/arch-tegra/pmc.h>
22 #include <asm/arch-tegra/pmu.h>
23 #include <asm/arch-tegra/sys_proto.h>
24 #include <asm/arch-tegra/uart.h>
25 #include <asm/arch-tegra/warmboot.h>
26 #include <asm/arch-tegra/gpu.h>
27 #include <asm/arch-tegra/usb.h>
28 #include <asm/arch-tegra/xusb-padctl.h>
29 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
30 #include <asm/arch/clock.h>
32 #if IS_ENABLED(CONFIG_TEGRA_PINCTRL)
33 #include <asm/arch/funcmux.h>
34 #include <asm/arch/pinmux.h>
36 #include <asm/arch/tegra.h>
37 #ifdef CONFIG_TEGRA_CLOCK_SCALING
38 #include <asm/arch/emc.h>
42 DECLARE_GLOBAL_DATA_PTR;
44 #ifdef CONFIG_SPL_BUILD
46 U_BOOT_DRVINFO(tegra_gpios) = {
51 __weak void pinmux_init(void) {}
52 __weak void pin_mux_usb(void) {}
53 __weak void pin_mux_spi(void) {}
54 __weak void pin_mux_mmc(void) {}
55 __weak void gpio_early_init_uart(void) {}
56 __weak void pin_mux_display(void) {}
57 __weak void start_cpu_fan(void) {}
58 __weak void cboot_late_init(void) {}
59 __weak void nvidia_board_late_init(void) {}
61 #if defined(CONFIG_TEGRA_NAND)
62 __weak void pin_mux_nand(void)
64 funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_DEFAULT);
69 * Routine: power_det_init
70 * Description: turn off power detects
72 static void power_det_init(void)
74 #if defined(CONFIG_TEGRA20)
75 struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
77 /* turn off power detects */
78 writel(0, &pmc->pmc_pwr_det_latch);
79 writel(0, &pmc->pmc_pwr_det);
83 __weak int tegra_board_id(void)
88 #ifdef CONFIG_DISPLAY_BOARDINFO
91 int board_id = tegra_board_id();
93 printf("Board: %s", CFG_TEGRA_BOARD_STRING);
95 printf(", ID: %d\n", board_id);
100 #endif /* CONFIG_DISPLAY_BOARDINFO */
102 __weak int tegra_lcd_pmic_init(int board_it)
107 __weak int nvidia_board_init(void)
113 * Routine: board_init
114 * Description: Early hardware init.
118 __maybe_unused int err;
119 __maybe_unused int board_id;
121 /* Do clocks and UART first so that printf() works */
122 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
129 #ifdef CONFIG_TEGRA_SPI
133 #ifdef CONFIG_MMC_SDHCI_TEGRA
137 /* Init is handled automatically in the driver-model case */
138 #if defined(CONFIG_VIDEO)
141 /* boot param addr */
142 gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
146 #ifdef CONFIG_SYS_I2C_TEGRA
147 # ifdef CONFIG_TEGRA_PMU
148 if (pmu_set_nominal())
149 debug("Failed to select nominal voltages\n");
150 # ifdef CONFIG_TEGRA_CLOCK_SCALING
151 err = board_emc_init();
153 debug("Memory controller init failed: %d\n", err);
155 # endif /* CONFIG_TEGRA_PMU */
156 #endif /* CONFIG_SYS_I2C_TEGRA */
158 #ifdef CONFIG_USB_EHCI_TEGRA
162 #if defined(CONFIG_VIDEO)
163 board_id = tegra_board_id();
164 err = tegra_lcd_pmic_init(board_id);
166 debug("Failed to set up LCD PMIC\n");
171 #ifdef CONFIG_TEGRA_NAND
175 tegra_xusb_padctl_init();
177 #ifdef CONFIG_TEGRA_LP0
178 /* save Sdram params to PMC 2, 4, and 24 for WB0 */
179 warmboot_save_sdram_params();
181 /* prepare the WB code to LP0 location */
182 warmboot_prepare_code(TEGRA_LP0_ADDR, TEGRA_LP0_SIZE);
184 return nvidia_board_init();
187 void board_cleanup_before_linux(void)
189 /* power down UPHY PLL */
190 tegra_xusb_padctl_exit();
193 #ifdef CONFIG_BOARD_EARLY_INIT_F
194 static void __gpio_early_init(void)
198 void gpio_early_init(void) __attribute__((weak, alias("__gpio_early_init")));
200 int board_early_init_f(void)
202 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
203 if (!clock_early_init_done())
207 #if defined(CONFIG_TEGRA_DISCONNECT_UDC_ON_BOOT)
208 #define USBCMD_FS2 (1 << 15)
210 struct usb_ctlr *usbctlr = (struct usb_ctlr *)0x7d000000;
211 writel(USBCMD_FS2, &usbctlr->usb_cmd);
215 /* Do any special system timer/TSC setup */
216 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
217 # if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
218 if (!tegra_cpu_is_non_secure())
223 #if defined(CONFIG_DISABLE_SDMMC1_EARLY)
225 * Turn off (reset/disable) SDMMC1 on Nano here, before GPIO INIT.
226 * We do this because earlier bootloaders have enabled power to
227 * SDMMC1 on Nano, and toggling power-gpio (PZ3) in pinmux_init()
228 * results in power being back-driven into the SD-card and SDMMC1
229 * HW, which is 'bad' as per the HW team.
231 * From the HW team: "LDO2 from the PMIC has already been set to 3.3v in
232 * nvtboot/CBoot on Nano (for SD-card boot). So when U-Boot's GPIO_INIT
233 * table sets PZ3 to OUT0 as per the pinmux spreadsheet, it turns off
234 * the loadswitch. When PZ3 is 0 and not driving, essentially the SDCard
235 * voltage turns off. Since the SDCard voltage is no longer there, the
236 * SDMMC CLK/DAT lines are backdriving into what essentially is a
237 * powered-off SDCard, that's why the voltage drops from 3.3V to ~1.6V"
239 * Note that this can probably be removed when we change over to storing
240 * all BL components on QSPI on Nano, and U-Boot then becomes the first
241 * one to turn on SDMMC1 power. Another fix would be to have CBoot
242 * disable power/gate SDMMC1 off before handing off to U-Boot/kernel.
244 reset_set_enable(PERIPH_ID_SDMMC1, 1);
245 clock_set_enable(PERIPH_ID_SDMMC1, 0);
246 #endif /* CONFIG_DISABLE_SDMMC1_EARLY */
251 /* Initialize periph GPIOs */
253 gpio_early_init_uart();
257 #endif /* EARLY_INIT */
259 int board_late_init(void)
261 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
262 if (tegra_cpu_is_non_secure()) {
263 printf("CPU is in NS mode\n");
264 env_set("cpu_ns_mode", "1");
266 env_set("cpu_ns_mode", "");
271 nvidia_board_late_init();
277 * In some SW environments, a memory carve-out exists to house a secure
278 * monitor, a trusted OS, and/or various statically allocated media buffers.
280 * This carveout exists at the highest possible address that is within a
281 * 32-bit physical address space.
283 * This function returns the total size of this carve-out. At present, the
284 * returned value is hard-coded for simplicity. In the future, it may be
285 * possible to determine the carve-out size:
286 * - By querying some run-time information source, such as:
287 * - A structure passed to U-Boot by earlier boot software.
289 * - A call into the secure monitor.
290 * - In the per-board U-Boot configuration header, based on knowledge of the
291 * SW environment that U-Boot is being built for.
293 * For now, we support two configurations in U-Boot:
294 * - 32-bit ports without any form of carve-out.
295 * - 64 bit ports which are assumed to use a carve-out of a conservatively
298 static ulong carveout_size(void)
302 #elif defined(CONFIG_ARMV7_SECURE_RESERVE_SIZE)
303 // BASE+SIZE might not == 4GB. If so, we want the carveout to cover
304 // from BASE to 4GB, not BASE to BASE+SIZE.
305 return (0 - CONFIG_ARMV7_SECURE_BASE) & ~(SZ_2M - 1);
312 * Determine the amount of usable RAM below 4GiB, taking into account any
313 * carve-out that may be assigned.
315 static ulong usable_ram_size_below_4g(void)
317 ulong total_size_below_4g;
318 ulong usable_size_below_4g;
321 * The total size of RAM below 4GiB is the lesser address of:
322 * (a) 2GiB itself (RAM starts at 2GiB, and 4GiB - 2GiB == 2GiB).
323 * (b) The size RAM physically present in the system.
325 if (gd->ram_size < SZ_2G)
326 total_size_below_4g = gd->ram_size;
328 total_size_below_4g = SZ_2G;
330 /* Calculate usable RAM by subtracting out any carve-out size */
331 usable_size_below_4g = total_size_below_4g - carveout_size();
333 return usable_size_below_4g;
337 * Represent all available RAM in either one or two banks.
339 * The first bank describes any usable RAM below 4GiB.
340 * The second bank describes any RAM above 4GiB.
342 * This split is driven by the following requirements:
343 * - The NVIDIA L4T kernel requires separate entries in the DT /memory/reg
344 * property for memory below and above the 4GiB boundary. The layout of that
345 * DT property is directly driven by the entries in the U-Boot bank array.
346 * - The potential existence of a carve-out at the end of RAM below 4GiB can
347 * only be represented using multiple banks.
349 * Explicitly removing the carve-out RAM from the bank entries makes the RAM
350 * layout a bit more obvious, e.g. when running "bdinfo" at the U-Boot
353 * This does mean that the DT U-Boot passes to the Linux kernel will not
354 * include this RAM in /memory/reg at all. An alternative would be to include
355 * all RAM in the U-Boot banks (and hence DT), and add a /memreserve/ node
356 * into DT to stop the kernel from using the RAM. IIUC, I don't /think/ the
357 * Linux kernel will ever need to access any RAM in* the carve-out via a CPU
358 * mapping, so either way is acceptable.
360 * On 32-bit systems, we never define a bank for RAM above 4GiB, since the
361 * start address of that bank cannot be represented in the 32-bit .size
364 int dram_init_banksize(void)
368 /* try to compute DRAM bank size based on cboot DTB first */
369 err = cboot_dram_init_banksize();
373 /* fall back to default DRAM bank size computation */
375 gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
376 gd->bd->bi_dram[0].size = usable_ram_size_below_4g();
379 gd->pci_ram_top = gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size;
382 #ifdef CONFIG_PHYS_64BIT
383 if (gd->ram_size > SZ_2G) {
384 gd->bd->bi_dram[1].start = 0x100000000;
385 gd->bd->bi_dram[1].size = gd->ram_size - SZ_2G;
389 gd->bd->bi_dram[1].start = 0;
390 gd->bd->bi_dram[1].size = 0;
397 * Most hardware on 64-bit Tegra is still restricted to DMA to the lower
398 * 32-bits of the physical address space. Cap the maximum usable RAM area
399 * at 4 GiB to avoid DMA buffers from being allocated beyond the 32-bit
400 * boundary that most devices can address. Also, don't let U-Boot use any
401 * carve-out, as mentioned above.
403 * This function is called before dram_init_banksize(), so we can't simply
404 * return gd->bd->bi_dram[1].start + gd->bd->bi_dram[1].size.
406 phys_size_t board_get_usable_ram_top(phys_size_t total_size)
410 /* try to get top of usable RAM based on cboot DTB first */
411 ram_top = cboot_get_usable_ram_top(total_size);
415 /* fall back to default usable RAM computation */
417 return CFG_SYS_SDRAM_BASE + usable_ram_size_below_4g();