1 // SPDX-License-Identifier: GPL-2.0+
5 * Common board functions for AM33XX based boards
7 * Copyright (C) 2011, Texas Instruments, Incorporated - https://www.ti.com/
12 #include <debug_uart.h>
18 #include <omap3_spi.h>
20 #include <asm/arch/cpu.h>
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/omap.h>
23 #include <asm/arch/ddr_defs.h>
24 #include <asm/arch/clock.h>
25 #include <asm/arch/gpio.h>
26 #include <asm/arch/i2c.h>
27 #if IS_ENABLED(CONFIG_TARGET_AM335X_GUARDIAN)
28 #include <asm/arch/mem-guardian.h>
30 #include <asm/arch/mem.h>
32 #include <asm/arch/mmc_host_def.h>
33 #include <asm/arch/sys_proto.h>
34 #include <asm/global_data.h>
38 #include <asm/omap_common.h>
42 #include <linux/delay.h>
43 #include <linux/errno.h>
44 #include <linux/compiler.h>
45 #include <linux/printk.h>
46 #include <linux/usb/ch9.h>
47 #include <linux/usb/gadget.h>
48 #include <linux/usb/musb.h>
49 #include <asm/omap_musb.h>
50 #include <asm/davinci_rtc.h>
52 #define AM43XX_EMIF_BASE 0x4C000000
53 #define AM43XX_SDRAM_CONFIG_OFFSET 0x8
54 #define AM43XX_SDRAM_TYPE_MASK 0xE0000000
55 #define AM43XX_SDRAM_TYPE_SHIFT 29
56 #define AM43XX_SDRAM_TYPE_DDR3 3
57 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
58 #define AM43XX_RDWRLVLFULL_START 0x80000000
61 #if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
62 #define AM33XX_SPI0_BASE 0x48030000
63 #define AM33XX_SPI0_OFFSET (AM33XX_SPI0_BASE + OMAP4_MCSPI_REG_OFFSET)
66 DECLARE_GLOBAL_DATA_PTR;
70 #if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT)
74 /* dram_init must store complete ramsize in gd->ram_size */
75 gd->ram_size = get_ram_size(
76 (void *)CFG_SYS_SDRAM_BASE,
77 CFG_MAX_RAM_BANK_SIZE);
81 int dram_init_banksize(void)
83 gd->bd->bi_dram[0].start = CFG_SYS_SDRAM_BASE;
84 gd->bd->bi_dram[0].size = gd->ram_size;
89 #if !CONFIG_IS_ENABLED(OF_CONTROL)
90 static const struct ns16550_plat am33xx_serial[] = {
91 { .base = CFG_SYS_NS16550_COM1, .reg_shift = 2,
92 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
93 # ifdef CFG_SYS_NS16550_COM2
94 { .base = CFG_SYS_NS16550_COM2, .reg_shift = 2,
95 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
96 # ifdef CFG_SYS_NS16550_COM3
97 { .base = CFG_SYS_NS16550_COM3, .reg_shift = 2,
98 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
99 { .base = CFG_SYS_NS16550_COM4, .reg_shift = 2,
100 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
101 { .base = CFG_SYS_NS16550_COM5, .reg_shift = 2,
102 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
103 { .base = CFG_SYS_NS16550_COM6, .reg_shift = 2,
104 .clock = CFG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
109 U_BOOT_DRVINFOS(am33xx_uarts) = {
110 { "ns16550_serial", &am33xx_serial[0] },
111 # ifdef CFG_SYS_NS16550_COM2
112 { "ns16550_serial", &am33xx_serial[1] },
113 # ifdef CFG_SYS_NS16550_COM3
114 { "ns16550_serial", &am33xx_serial[2] },
115 { "ns16550_serial", &am33xx_serial[3] },
116 { "ns16550_serial", &am33xx_serial[4] },
117 { "ns16550_serial", &am33xx_serial[5] },
122 #if CONFIG_IS_ENABLED(DM_I2C)
123 static const struct omap_i2c_plat am33xx_i2c[] = {
124 { I2C_BASE1, 100000, OMAP_I2C_REV_V2},
125 { I2C_BASE2, 100000, OMAP_I2C_REV_V2},
126 { I2C_BASE3, 100000, OMAP_I2C_REV_V2},
129 U_BOOT_DRVINFOS(am33xx_i2c) = {
130 { "i2c_omap", &am33xx_i2c[0] },
131 { "i2c_omap", &am33xx_i2c[1] },
132 { "i2c_omap", &am33xx_i2c[2] },
136 #if CONFIG_IS_ENABLED(DM_GPIO)
137 static const struct omap_gpio_plat am33xx_gpio[] = {
138 { 0, AM33XX_GPIO0_BASE },
139 { 1, AM33XX_GPIO1_BASE },
140 { 2, AM33XX_GPIO2_BASE },
141 { 3, AM33XX_GPIO3_BASE },
143 { 4, AM33XX_GPIO4_BASE },
144 { 5, AM33XX_GPIO5_BASE },
148 U_BOOT_DRVINFOS(am33xx_gpios) = {
149 { "gpio_omap", &am33xx_gpio[0] },
150 { "gpio_omap", &am33xx_gpio[1] },
151 { "gpio_omap", &am33xx_gpio[2] },
152 { "gpio_omap", &am33xx_gpio[3] },
154 { "gpio_omap", &am33xx_gpio[4] },
155 { "gpio_omap", &am33xx_gpio[5] },
159 #if CONFIG_IS_ENABLED(DM_SPI) && !CONFIG_IS_ENABLED(OF_CONTROL)
160 static const struct omap3_spi_plat omap3_spi_pdata = {
161 .regs = (struct mcspi *)AM33XX_SPI0_OFFSET,
162 .pin_dir = MCSPI_PINDIR_D0_IN_D1_OUT,
165 U_BOOT_DRVINFO(am33xx_spi) = {
167 .plat = &omap3_spi_pdata,
172 #if !CONFIG_IS_ENABLED(DM_GPIO)
173 static const struct gpio_bank gpio_bank_am33xx[] = {
174 { (void *)AM33XX_GPIO0_BASE },
175 { (void *)AM33XX_GPIO1_BASE },
176 { (void *)AM33XX_GPIO2_BASE },
177 { (void *)AM33XX_GPIO3_BASE },
179 { (void *)AM33XX_GPIO4_BASE },
180 { (void *)AM33XX_GPIO5_BASE },
184 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
187 #if defined(CONFIG_MMC_OMAP_HS)
188 int cpu_mmc_init(struct bd_info *bis)
192 ret = omap_mmc_init(0, 0, 0, -1, -1);
196 return omap_mmc_init(1, 0, 0, -1, -1);
201 * RTC only with DDR in self-refresh mode magic value, checked against during
202 * boot to see if we have a valid config. This should be in sync with the value
203 * that will be in drivers/soc/ti/pm33xx.c.
205 #define RTC_MAGIC_VAL 0x8cd0
207 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
208 #define RTC_BOARD_TYPE_SHIFT 16
210 /* AM33XX has two MUSB controllers which can be host or gadget */
211 #if (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
212 defined(CONFIG_SPL_BUILD)
214 static struct musb_hdrc_config musb_config = {
221 #ifdef CONFIG_AM335X_USB0
222 static struct ti_musb_plat usb0 = {
223 .base = (void *)USB0_OTG_BASE,
224 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
226 .config = &musb_config,
228 .platform_ops = &musb_dsps_ops,
233 #ifdef CONFIG_AM335X_USB1
234 static struct ti_musb_plat usb1 = {
235 .base = (void *)USB1_OTG_BASE,
236 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
238 .config = &musb_config,
240 .platform_ops = &musb_dsps_ops,
245 U_BOOT_DRVINFOS(am33xx_usbs) = {
246 #ifdef CONFIG_AM335X_USB0_PERIPHERAL
247 { "ti-musb-peripheral", &usb0 },
248 #elif defined(CONFIG_AM335X_USB0_HOST)
249 { "ti-musb-host", &usb0 },
251 #ifdef CONFIG_AM335X_USB1_PERIPHERAL
252 { "ti-musb-peripheral", &usb1 },
253 #elif defined(CONFIG_AM335X_USB1_HOST)
254 { "ti-musb-host", &usb1 },
258 int arch_misc_init(void)
262 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
264 int arch_misc_init(void)
269 ret = uclass_first_device_err(UCLASS_MISC, &dev);
273 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
280 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
282 #if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT)
284 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
285 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
286 static void rtc32k_unlock(struct davinci_rtc *rtc)
289 * Unlock the RTC's registers. For more details please see the
290 * RTC_SS section of the TRM. In order to unlock we need to
291 * write these specific values (keys) in this order.
293 writel(RTC_KICK0R_WE, &rtc->kick0r);
294 writel(RTC_KICK1R_WE, &rtc->kick1r);
298 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
300 * Write contents of the RTC_SCRATCH1 register based on board type
301 * Two things are passed
302 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
303 * control gets to kernel, kernel reads the scratchpad register and gets to
304 * know that bootloader has rtc_only support.
306 * Second important thing is the board type (16:31). This is needed in the
307 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
308 * identify the board type and we go ahead and copy the board strings to
311 void update_rtc_magic(void)
313 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
314 u32 magic = RTC_MAGIC_VAL;
316 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
321 writel(magic, &rtc->scratch1);
326 * In the case of non-SPL based booting we'll want to call these
327 * functions a tiny bit later as it will require gd to be set and cleared
328 * and that's not true in s_init in this case so we cannot do it there.
330 int board_early_init_f(void)
334 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
341 * This function is the place to do per-board things such as ramp up the
342 * MPU clock frequency.
344 __weak void am33xx_spl_board_init(void)
348 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
349 static void rtc32k_enable(void)
351 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
355 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
356 writel((1 << 3) | (1 << 6), &rtc->osc);
360 static void uart_soft_reset(void)
362 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
365 regval = readl(&uart_base->uartsyscfg);
366 regval |= UART_RESET;
367 writel(regval, &uart_base->uartsyscfg);
368 while ((readl(&uart_base->uartsyssts) &
369 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
372 /* Disable smart idle */
373 regval = readl(&uart_base->uartsyscfg);
374 regval |= UART_SMART_IDLE_EN;
375 writel(regval, &uart_base->uartsyscfg);
378 static void watchdog_disable(void)
380 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
382 writel(0xAAAA, &wdtimer->wdtwspr);
383 while (readl(&wdtimer->wdtwwps) != 0x0)
385 writel(0x5555, &wdtimer->wdtwspr);
386 while (readl(&wdtimer->wdtwwps) != 0x0)
390 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
392 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
394 static void rtc_only(void)
396 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
397 struct prm_device_inst *prm_device =
398 (struct prm_device_inst *)PRM_DEVICE_INST;
401 void (*resume_func)(void);
403 scratch1 = readl(&rtc->scratch1);
406 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
407 * written to this register when we want to wake up from RTC only
408 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
409 * bits 0-15: RTC_MAGIC_VAL
410 * bits 16-31: board type (needed for sdram_init)
412 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
417 /* Clear RTC magic */
418 writel(0, &rtc->scratch1);
421 * Update board type based on value stored on RTC_SCRATCH1, this
422 * is done so that we don't need to read the board type from eeprom
423 * over i2c bus which is expensive
425 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
428 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
429 * are resuming from self-refresh. This avoids an unnecessary re-init
430 * of the DDR. The re-init takes time and we would need to wait for
431 * it to complete before accessing DDR to avoid L3 NOC errors.
433 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
435 rtc_only_prcm_init();
438 /* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
439 /* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
440 sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);
442 sdrc &= AM43XX_SDRAM_TYPE_MASK;
443 sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;
445 if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
446 writel(AM43XX_RDWRLVLFULL_START,
448 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
452 sdrc = readl(AM43XX_EMIF_BASE +
453 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
454 if (sdrc == AM43XX_RDWRLVLFULL_START)
458 resume_func = (void *)readl(&rtc->scratch0);
466 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
471 void early_system_init(void)
474 * The ROM will only have set up sufficient pinmux to allow for the
475 * first 4KiB NOR to be read, we must finish doing what we know of
476 * the NOR mux in this space in order to continue.
478 #ifdef CONFIG_NOR_BOOT
479 enable_norboot_pin_mux();
483 setup_early_clocks();
485 #ifdef CONFIG_SPL_BUILD
487 * Save the boot parameters passed from romcode.
488 * We cannot delay the saving further than this,
489 * to prevent overwrites.
491 save_omap_boot_params();
493 #ifdef CONFIG_DEBUG_UART_OMAP
497 #ifdef CONFIG_SPL_BUILD
501 #ifdef CONFIG_TI_I2C_BOARD_DETECT
505 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
506 /* Enable RTC32K clock */
511 #ifdef CONFIG_SPL_BUILD
512 void board_init_f(ulong dummy)
516 board_early_init_f();
518 /* dram_init must store complete ramsize in gd->ram_size */
519 gd->ram_size = get_ram_size(
520 (void *)CFG_SYS_SDRAM_BASE,
521 CFG_MAX_RAM_BANK_SIZE);
527 static int am33xx_dm_post_init(void)
530 #if !CONFIG_IS_ENABLED(SKIP_LOWLEVEL_INIT)
535 EVENT_SPY_SIMPLE(EVT_DM_POST_INIT_F, am33xx_dm_post_init);