1 // SPDX-License-Identifier: GPL-2.0+
5 * Common board functions for AM33XX based boards
7 * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
12 #include <debug_uart.h>
18 #include <asm/arch/cpu.h>
19 #include <asm/arch/hardware.h>
20 #include <asm/arch/omap.h>
21 #include <asm/arch/ddr_defs.h>
22 #include <asm/arch/clock.h>
23 #include <asm/arch/gpio.h>
24 #include <asm/arch/i2c.h>
25 #include <asm/arch/mem.h>
26 #include <asm/arch/mmc_host_def.h>
27 #include <asm/arch/sys_proto.h>
31 #include <asm/omap_common.h>
35 #include <linux/errno.h>
36 #include <linux/compiler.h>
37 #include <linux/usb/ch9.h>
38 #include <linux/usb/gadget.h>
39 #include <linux/usb/musb.h>
40 #include <asm/omap_musb.h>
41 #include <asm/davinci_rtc.h>
43 #define AM43XX_EMIF_BASE 0x4C000000
44 #define AM43XX_SDRAM_CONFIG_OFFSET 0x8
45 #define AM43XX_SDRAM_TYPE_MASK 0xE0000000
46 #define AM43XX_SDRAM_TYPE_SHIFT 29
47 #define AM43XX_SDRAM_TYPE_DDR3 3
48 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
49 #define AM43XX_RDWRLVLFULL_START 0x80000000
51 DECLARE_GLOBAL_DATA_PTR;
55 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
59 /* dram_init must store complete ramsize in gd->ram_size */
60 gd->ram_size = get_ram_size(
61 (void *)CONFIG_SYS_SDRAM_BASE,
62 CONFIG_MAX_RAM_BANK_SIZE);
66 int dram_init_banksize(void)
68 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
69 gd->bd->bi_dram[0].size = gd->ram_size;
74 #if !CONFIG_IS_ENABLED(OF_CONTROL)
75 static const struct ns16550_platdata am33xx_serial[] = {
76 { .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
77 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
78 # ifdef CONFIG_SYS_NS16550_COM2
79 { .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
80 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
81 # ifdef CONFIG_SYS_NS16550_COM3
82 { .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
83 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
84 { .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
85 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
86 { .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
87 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
88 { .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
89 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
94 U_BOOT_DEVICES(am33xx_uarts) = {
95 { "ns16550_serial", &am33xx_serial[0] },
96 # ifdef CONFIG_SYS_NS16550_COM2
97 { "ns16550_serial", &am33xx_serial[1] },
98 # ifdef CONFIG_SYS_NS16550_COM3
99 { "ns16550_serial", &am33xx_serial[2] },
100 { "ns16550_serial", &am33xx_serial[3] },
101 { "ns16550_serial", &am33xx_serial[4] },
102 { "ns16550_serial", &am33xx_serial[5] },
108 static const struct omap_i2c_platdata am33xx_i2c[] = {
109 { I2C_BASE1, 100000, OMAP_I2C_REV_V2},
110 { I2C_BASE2, 100000, OMAP_I2C_REV_V2},
111 { I2C_BASE3, 100000, OMAP_I2C_REV_V2},
114 U_BOOT_DEVICES(am33xx_i2c) = {
115 { "i2c_omap", &am33xx_i2c[0] },
116 { "i2c_omap", &am33xx_i2c[1] },
117 { "i2c_omap", &am33xx_i2c[2] },
121 #if CONFIG_IS_ENABLED(DM_GPIO)
122 static const struct omap_gpio_platdata am33xx_gpio[] = {
123 { 0, AM33XX_GPIO0_BASE },
124 { 1, AM33XX_GPIO1_BASE },
125 { 2, AM33XX_GPIO2_BASE },
126 { 3, AM33XX_GPIO3_BASE },
128 { 4, AM33XX_GPIO4_BASE },
129 { 5, AM33XX_GPIO5_BASE },
133 U_BOOT_DEVICES(am33xx_gpios) = {
134 { "gpio_omap", &am33xx_gpio[0] },
135 { "gpio_omap", &am33xx_gpio[1] },
136 { "gpio_omap", &am33xx_gpio[2] },
137 { "gpio_omap", &am33xx_gpio[3] },
139 { "gpio_omap", &am33xx_gpio[4] },
140 { "gpio_omap", &am33xx_gpio[5] },
146 #if !CONFIG_IS_ENABLED(DM_GPIO)
147 static const struct gpio_bank gpio_bank_am33xx[] = {
148 { (void *)AM33XX_GPIO0_BASE },
149 { (void *)AM33XX_GPIO1_BASE },
150 { (void *)AM33XX_GPIO2_BASE },
151 { (void *)AM33XX_GPIO3_BASE },
153 { (void *)AM33XX_GPIO4_BASE },
154 { (void *)AM33XX_GPIO5_BASE },
158 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
161 #if defined(CONFIG_MMC_OMAP_HS)
162 int cpu_mmc_init(bd_t *bis)
166 ret = omap_mmc_init(0, 0, 0, -1, -1);
170 return omap_mmc_init(1, 0, 0, -1, -1);
175 * RTC only with DDR in self-refresh mode magic value, checked against during
176 * boot to see if we have a valid config. This should be in sync with the value
177 * that will be in drivers/soc/ti/pm33xx.c.
179 #define RTC_MAGIC_VAL 0x8cd0
181 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
182 #define RTC_BOARD_TYPE_SHIFT 16
184 /* AM33XX has two MUSB controllers which can be host or gadget */
185 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
186 (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
187 (!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
188 (!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))
190 static struct musb_hdrc_config musb_config = {
197 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
198 static struct ti_musb_platdata usb0 = {
199 .base = (void *)USB0_OTG_BASE,
200 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
202 .config = &musb_config,
204 .platform_ops = &musb_dsps_ops,
208 static struct ti_musb_platdata usb1 = {
209 .base = (void *)USB1_OTG_BASE,
210 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
212 .config = &musb_config,
214 .platform_ops = &musb_dsps_ops,
218 U_BOOT_DEVICES(am33xx_usbs) = {
219 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
220 { "ti-musb-peripheral", &usb0 },
221 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
222 { "ti-musb-host", &usb0 },
224 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
225 { "ti-musb-peripheral", &usb1 },
226 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
227 { "ti-musb-host", &usb1 },
231 int arch_misc_init(void)
236 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
238 /* USB 2.0 PHY Control */
239 #define CM_PHY_PWRDN (1 << 0)
240 #define CM_PHY_OTG_PWRDN (1 << 1)
241 #define OTGVDET_EN (1 << 19)
242 #define OTGSESSENDEN (1 << 20)
244 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
247 clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
248 OTGVDET_EN | OTGSESSENDEN);
250 clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
254 #ifdef CONFIG_AM335X_USB0
255 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
257 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
260 struct omap_musb_board_data otg0_board_data = {
261 .set_phy_power = am33xx_otg0_set_phy_power,
264 static struct musb_hdrc_platform_data otg0_plat = {
265 .mode = CONFIG_AM335X_USB0_MODE,
266 .config = &musb_config,
268 .platform_ops = &musb_dsps_ops,
269 .board_data = &otg0_board_data,
273 #ifdef CONFIG_AM335X_USB1
274 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
276 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
279 struct omap_musb_board_data otg1_board_data = {
280 .set_phy_power = am33xx_otg1_set_phy_power,
283 static struct musb_hdrc_platform_data otg1_plat = {
284 .mode = CONFIG_AM335X_USB1_MODE,
285 .config = &musb_config,
287 .platform_ops = &musb_dsps_ops,
288 .board_data = &otg1_board_data,
292 int arch_misc_init(void)
294 #ifdef CONFIG_AM335X_USB0
295 musb_register(&otg0_plat, &otg0_board_data,
296 (void *)USB0_OTG_BASE);
298 #ifdef CONFIG_AM335X_USB1
299 musb_register(&otg1_plat, &otg1_board_data,
300 (void *)USB1_OTG_BASE);
306 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
308 int arch_misc_init(void)
313 ret = uclass_first_device(UCLASS_MISC, &dev);
317 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
318 ret = usb_ether_init();
320 pr_err("USB ether init failed\n");
328 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
330 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
332 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
333 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
334 static void rtc32k_unlock(struct davinci_rtc *rtc)
337 * Unlock the RTC's registers. For more details please see the
338 * RTC_SS section of the TRM. In order to unlock we need to
339 * write these specific values (keys) in this order.
341 writel(RTC_KICK0R_WE, &rtc->kick0r);
342 writel(RTC_KICK1R_WE, &rtc->kick1r);
346 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
348 * Write contents of the RTC_SCRATCH1 register based on board type
349 * Two things are passed
350 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
351 * control gets to kernel, kernel reads the scratchpad register and gets to
352 * know that bootloader has rtc_only support.
354 * Second important thing is the board type (16:31). This is needed in the
355 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
356 * identify the board type and we go ahead and copy the board strings to
359 void update_rtc_magic(void)
361 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
362 u32 magic = RTC_MAGIC_VAL;
364 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
369 writel(magic, &rtc->scratch1);
374 * In the case of non-SPL based booting we'll want to call these
375 * functions a tiny bit later as it will require gd to be set and cleared
376 * and that's not true in s_init in this case so we cannot do it there.
378 int board_early_init_f(void)
382 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
389 * This function is the place to do per-board things such as ramp up the
390 * MPU clock frequency.
392 __weak void am33xx_spl_board_init(void)
396 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
397 static void rtc32k_enable(void)
399 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
403 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
404 writel((1 << 3) | (1 << 6), &rtc->osc);
408 static void uart_soft_reset(void)
410 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
413 regval = readl(&uart_base->uartsyscfg);
414 regval |= UART_RESET;
415 writel(regval, &uart_base->uartsyscfg);
416 while ((readl(&uart_base->uartsyssts) &
417 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
420 /* Disable smart idle */
421 regval = readl(&uart_base->uartsyscfg);
422 regval |= UART_SMART_IDLE_EN;
423 writel(regval, &uart_base->uartsyscfg);
426 static void watchdog_disable(void)
428 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
430 writel(0xAAAA, &wdtimer->wdtwspr);
431 while (readl(&wdtimer->wdtwwps) != 0x0)
433 writel(0x5555, &wdtimer->wdtwspr);
434 while (readl(&wdtimer->wdtwwps) != 0x0)
438 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
440 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
442 static void rtc_only(void)
444 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
445 struct prm_device_inst *prm_device =
446 (struct prm_device_inst *)PRM_DEVICE_INST;
449 void (*resume_func)(void);
451 scratch1 = readl(&rtc->scratch1);
454 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
455 * written to this register when we want to wake up from RTC only
456 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
457 * bits 0-15: RTC_MAGIC_VAL
458 * bits 16-31: board type (needed for sdram_init)
460 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
465 /* Clear RTC magic */
466 writel(0, &rtc->scratch1);
469 * Update board type based on value stored on RTC_SCRATCH1, this
470 * is done so that we don't need to read the board type from eeprom
471 * over i2c bus which is expensive
473 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
476 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
477 * are resuming from self-refresh. This avoids an unnecessary re-init
478 * of the DDR. The re-init takes time and we would need to wait for
479 * it to complete before accessing DDR to avoid L3 NOC errors.
481 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
483 rtc_only_prcm_init();
486 /* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
487 /* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
488 sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);
490 sdrc &= AM43XX_SDRAM_TYPE_MASK;
491 sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;
493 if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
494 writel(AM43XX_RDWRLVLFULL_START,
496 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
500 sdrc = readl(AM43XX_EMIF_BASE +
501 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
502 if (sdrc == AM43XX_RDWRLVLFULL_START)
506 resume_func = (void *)readl(&rtc->scratch0);
514 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
519 void early_system_init(void)
522 * The ROM will only have set up sufficient pinmux to allow for the
523 * first 4KiB NOR to be read, we must finish doing what we know of
524 * the NOR mux in this space in order to continue.
526 #ifdef CONFIG_NOR_BOOT
527 enable_norboot_pin_mux();
531 setup_early_clocks();
533 #ifdef CONFIG_SPL_BUILD
535 * Save the boot parameters passed from romcode.
536 * We cannot delay the saving further than this,
537 * to prevent overwrites.
539 save_omap_boot_params();
541 #ifdef CONFIG_DEBUG_UART_OMAP
545 #ifdef CONFIG_SPL_BUILD
549 #ifdef CONFIG_TI_I2C_BOARD_DETECT
553 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
554 /* Enable RTC32K clock */
559 #ifdef CONFIG_SPL_BUILD
560 void board_init_f(ulong dummy)
564 board_early_init_f();
566 /* dram_init must store complete ramsize in gd->ram_size */
567 gd->ram_size = get_ram_size(
568 (void *)CONFIG_SYS_SDRAM_BASE,
569 CONFIG_MAX_RAM_BANK_SIZE);
575 int arch_cpu_init_dm(void)
578 #ifndef CONFIG_SKIP_LOWLEVEL_INIT