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>
17 #include <asm/arch/cpu.h>
18 #include <asm/arch/hardware.h>
19 #include <asm/arch/omap.h>
20 #include <asm/arch/ddr_defs.h>
21 #include <asm/arch/clock.h>
22 #include <asm/arch/gpio.h>
23 #include <asm/arch/i2c.h>
24 #include <asm/arch/mem.h>
25 #include <asm/arch/mmc_host_def.h>
26 #include <asm/arch/sys_proto.h>
30 #include <asm/omap_common.h>
34 #include <linux/errno.h>
35 #include <linux/compiler.h>
36 #include <linux/usb/ch9.h>
37 #include <linux/usb/gadget.h>
38 #include <linux/usb/musb.h>
39 #include <asm/omap_musb.h>
40 #include <asm/davinci_rtc.h>
42 #define AM43XX_EMIF_BASE 0x4C000000
43 #define AM43XX_SDRAM_CONFIG_OFFSET 0x8
44 #define AM43XX_SDRAM_TYPE_MASK 0xE0000000
45 #define AM43XX_SDRAM_TYPE_SHIFT 29
46 #define AM43XX_SDRAM_TYPE_DDR3 3
47 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
48 #define AM43XX_RDWRLVLFULL_START 0x80000000
50 DECLARE_GLOBAL_DATA_PTR;
54 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
58 /* dram_init must store complete ramsize in gd->ram_size */
59 gd->ram_size = get_ram_size(
60 (void *)CONFIG_SYS_SDRAM_BASE,
61 CONFIG_MAX_RAM_BANK_SIZE);
65 int dram_init_banksize(void)
67 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
68 gd->bd->bi_dram[0].size = gd->ram_size;
73 #if !CONFIG_IS_ENABLED(OF_CONTROL)
74 static const struct ns16550_platdata am33xx_serial[] = {
75 { .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
76 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
77 # ifdef CONFIG_SYS_NS16550_COM2
78 { .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
79 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
80 # ifdef CONFIG_SYS_NS16550_COM3
81 { .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
82 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
83 { .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
84 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
85 { .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
86 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
87 { .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
88 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
93 U_BOOT_DEVICES(am33xx_uarts) = {
94 { "ns16550_serial", &am33xx_serial[0] },
95 # ifdef CONFIG_SYS_NS16550_COM2
96 { "ns16550_serial", &am33xx_serial[1] },
97 # ifdef CONFIG_SYS_NS16550_COM3
98 { "ns16550_serial", &am33xx_serial[2] },
99 { "ns16550_serial", &am33xx_serial[3] },
100 { "ns16550_serial", &am33xx_serial[4] },
101 { "ns16550_serial", &am33xx_serial[5] },
107 static const struct omap_i2c_platdata am33xx_i2c[] = {
108 { I2C_BASE1, 100000, OMAP_I2C_REV_V2},
109 { I2C_BASE2, 100000, OMAP_I2C_REV_V2},
110 { I2C_BASE3, 100000, OMAP_I2C_REV_V2},
113 U_BOOT_DEVICES(am33xx_i2c) = {
114 { "i2c_omap", &am33xx_i2c[0] },
115 { "i2c_omap", &am33xx_i2c[1] },
116 { "i2c_omap", &am33xx_i2c[2] },
120 #if CONFIG_IS_ENABLED(DM_GPIO)
121 static const struct omap_gpio_platdata am33xx_gpio[] = {
122 { 0, AM33XX_GPIO0_BASE },
123 { 1, AM33XX_GPIO1_BASE },
124 { 2, AM33XX_GPIO2_BASE },
125 { 3, AM33XX_GPIO3_BASE },
127 { 4, AM33XX_GPIO4_BASE },
128 { 5, AM33XX_GPIO5_BASE },
132 U_BOOT_DEVICES(am33xx_gpios) = {
133 { "gpio_omap", &am33xx_gpio[0] },
134 { "gpio_omap", &am33xx_gpio[1] },
135 { "gpio_omap", &am33xx_gpio[2] },
136 { "gpio_omap", &am33xx_gpio[3] },
138 { "gpio_omap", &am33xx_gpio[4] },
139 { "gpio_omap", &am33xx_gpio[5] },
145 #if !CONFIG_IS_ENABLED(DM_GPIO)
146 static const struct gpio_bank gpio_bank_am33xx[] = {
147 { (void *)AM33XX_GPIO0_BASE },
148 { (void *)AM33XX_GPIO1_BASE },
149 { (void *)AM33XX_GPIO2_BASE },
150 { (void *)AM33XX_GPIO3_BASE },
152 { (void *)AM33XX_GPIO4_BASE },
153 { (void *)AM33XX_GPIO5_BASE },
157 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
160 #if defined(CONFIG_MMC_OMAP_HS)
161 int cpu_mmc_init(bd_t *bis)
165 ret = omap_mmc_init(0, 0, 0, -1, -1);
169 return omap_mmc_init(1, 0, 0, -1, -1);
174 * RTC only with DDR in self-refresh mode magic value, checked against during
175 * boot to see if we have a valid config. This should be in sync with the value
176 * that will be in drivers/soc/ti/pm33xx.c.
178 #define RTC_MAGIC_VAL 0x8cd0
180 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
181 #define RTC_BOARD_TYPE_SHIFT 16
183 /* AM33XX has two MUSB controllers which can be host or gadget */
184 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
185 (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
186 (!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
187 (!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))
189 static struct musb_hdrc_config musb_config = {
196 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
197 static struct ti_musb_platdata usb0 = {
198 .base = (void *)USB0_OTG_BASE,
199 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
201 .config = &musb_config,
203 .platform_ops = &musb_dsps_ops,
207 static struct ti_musb_platdata usb1 = {
208 .base = (void *)USB1_OTG_BASE,
209 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
211 .config = &musb_config,
213 .platform_ops = &musb_dsps_ops,
217 U_BOOT_DEVICES(am33xx_usbs) = {
218 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
219 { "ti-musb-peripheral", &usb0 },
220 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
221 { "ti-musb-host", &usb0 },
223 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
224 { "ti-musb-peripheral", &usb1 },
225 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
226 { "ti-musb-host", &usb1 },
230 int arch_misc_init(void)
235 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
237 /* USB 2.0 PHY Control */
238 #define CM_PHY_PWRDN (1 << 0)
239 #define CM_PHY_OTG_PWRDN (1 << 1)
240 #define OTGVDET_EN (1 << 19)
241 #define OTGSESSENDEN (1 << 20)
243 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
246 clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
247 OTGVDET_EN | OTGSESSENDEN);
249 clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
253 #ifdef CONFIG_AM335X_USB0
254 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
256 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
259 struct omap_musb_board_data otg0_board_data = {
260 .set_phy_power = am33xx_otg0_set_phy_power,
263 static struct musb_hdrc_platform_data otg0_plat = {
264 .mode = CONFIG_AM335X_USB0_MODE,
265 .config = &musb_config,
267 .platform_ops = &musb_dsps_ops,
268 .board_data = &otg0_board_data,
272 #ifdef CONFIG_AM335X_USB1
273 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
275 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
278 struct omap_musb_board_data otg1_board_data = {
279 .set_phy_power = am33xx_otg1_set_phy_power,
282 static struct musb_hdrc_platform_data otg1_plat = {
283 .mode = CONFIG_AM335X_USB1_MODE,
284 .config = &musb_config,
286 .platform_ops = &musb_dsps_ops,
287 .board_data = &otg1_board_data,
291 int arch_misc_init(void)
293 #ifdef CONFIG_AM335X_USB0
294 musb_register(&otg0_plat, &otg0_board_data,
295 (void *)USB0_OTG_BASE);
297 #ifdef CONFIG_AM335X_USB1
298 musb_register(&otg1_plat, &otg1_board_data,
299 (void *)USB1_OTG_BASE);
305 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
307 int arch_misc_init(void)
312 ret = uclass_first_device(UCLASS_MISC, &dev);
316 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
317 ret = usb_ether_init();
319 pr_err("USB ether init failed\n");
327 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
329 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
331 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
332 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
333 static void rtc32k_unlock(struct davinci_rtc *rtc)
336 * Unlock the RTC's registers. For more details please see the
337 * RTC_SS section of the TRM. In order to unlock we need to
338 * write these specific values (keys) in this order.
340 writel(RTC_KICK0R_WE, &rtc->kick0r);
341 writel(RTC_KICK1R_WE, &rtc->kick1r);
345 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
347 * Write contents of the RTC_SCRATCH1 register based on board type
348 * Two things are passed
349 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
350 * control gets to kernel, kernel reads the scratchpad register and gets to
351 * know that bootloader has rtc_only support.
353 * Second important thing is the board type (16:31). This is needed in the
354 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
355 * identify the board type and we go ahead and copy the board strings to
358 void update_rtc_magic(void)
360 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
361 u32 magic = RTC_MAGIC_VAL;
363 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
368 writel(magic, &rtc->scratch1);
373 * In the case of non-SPL based booting we'll want to call these
374 * functions a tiny bit later as it will require gd to be set and cleared
375 * and that's not true in s_init in this case so we cannot do it there.
377 int board_early_init_f(void)
381 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
388 * This function is the place to do per-board things such as ramp up the
389 * MPU clock frequency.
391 __weak void am33xx_spl_board_init(void)
395 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
396 static void rtc32k_enable(void)
398 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
402 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
403 writel((1 << 3) | (1 << 6), &rtc->osc);
407 static void uart_soft_reset(void)
409 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
412 regval = readl(&uart_base->uartsyscfg);
413 regval |= UART_RESET;
414 writel(regval, &uart_base->uartsyscfg);
415 while ((readl(&uart_base->uartsyssts) &
416 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
419 /* Disable smart idle */
420 regval = readl(&uart_base->uartsyscfg);
421 regval |= UART_SMART_IDLE_EN;
422 writel(regval, &uart_base->uartsyscfg);
425 static void watchdog_disable(void)
427 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
429 writel(0xAAAA, &wdtimer->wdtwspr);
430 while (readl(&wdtimer->wdtwwps) != 0x0)
432 writel(0x5555, &wdtimer->wdtwspr);
433 while (readl(&wdtimer->wdtwwps) != 0x0)
437 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
439 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
441 static void rtc_only(void)
443 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
444 struct prm_device_inst *prm_device =
445 (struct prm_device_inst *)PRM_DEVICE_INST;
448 void (*resume_func)(void);
450 scratch1 = readl(&rtc->scratch1);
453 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
454 * written to this register when we want to wake up from RTC only
455 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
456 * bits 0-15: RTC_MAGIC_VAL
457 * bits 16-31: board type (needed for sdram_init)
459 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
464 /* Clear RTC magic */
465 writel(0, &rtc->scratch1);
468 * Update board type based on value stored on RTC_SCRATCH1, this
469 * is done so that we don't need to read the board type from eeprom
470 * over i2c bus which is expensive
472 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
475 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
476 * are resuming from self-refresh. This avoids an unnecessary re-init
477 * of the DDR. The re-init takes time and we would need to wait for
478 * it to complete before accessing DDR to avoid L3 NOC errors.
480 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
482 rtc_only_prcm_init();
485 /* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
486 /* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
487 sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);
489 sdrc &= AM43XX_SDRAM_TYPE_MASK;
490 sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;
492 if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
493 writel(AM43XX_RDWRLVLFULL_START,
495 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
499 sdrc = readl(AM43XX_EMIF_BASE +
500 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
501 if (sdrc == AM43XX_RDWRLVLFULL_START)
505 resume_func = (void *)readl(&rtc->scratch0);
513 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
518 void early_system_init(void)
521 * The ROM will only have set up sufficient pinmux to allow for the
522 * first 4KiB NOR to be read, we must finish doing what we know of
523 * the NOR mux in this space in order to continue.
525 #ifdef CONFIG_NOR_BOOT
526 enable_norboot_pin_mux();
530 setup_early_clocks();
532 #ifdef CONFIG_SPL_BUILD
534 * Save the boot parameters passed from romcode.
535 * We cannot delay the saving further than this,
536 * to prevent overwrites.
538 save_omap_boot_params();
540 #ifdef CONFIG_DEBUG_UART_OMAP
544 #ifdef CONFIG_SPL_BUILD
548 #ifdef CONFIG_TI_I2C_BOARD_DETECT
552 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
553 /* Enable RTC32K clock */
558 #ifdef CONFIG_SPL_BUILD
559 void board_init_f(ulong dummy)
563 board_early_init_f();
565 /* dram_init must store complete ramsize in gd->ram_size */
566 gd->ram_size = get_ram_size(
567 (void *)CONFIG_SYS_SDRAM_BASE,
568 CONFIG_MAX_RAM_BANK_SIZE);
574 int arch_cpu_init_dm(void)
577 #ifndef CONFIG_SKIP_LOWLEVEL_INIT