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/delay.h>
36 #include <linux/errno.h>
37 #include <linux/compiler.h>
38 #include <linux/usb/ch9.h>
39 #include <linux/usb/gadget.h>
40 #include <linux/usb/musb.h>
41 #include <asm/omap_musb.h>
42 #include <asm/davinci_rtc.h>
44 #define AM43XX_EMIF_BASE 0x4C000000
45 #define AM43XX_SDRAM_CONFIG_OFFSET 0x8
46 #define AM43XX_SDRAM_TYPE_MASK 0xE0000000
47 #define AM43XX_SDRAM_TYPE_SHIFT 29
48 #define AM43XX_SDRAM_TYPE_DDR3 3
49 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
50 #define AM43XX_RDWRLVLFULL_START 0x80000000
52 DECLARE_GLOBAL_DATA_PTR;
56 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
60 /* dram_init must store complete ramsize in gd->ram_size */
61 gd->ram_size = get_ram_size(
62 (void *)CONFIG_SYS_SDRAM_BASE,
63 CONFIG_MAX_RAM_BANK_SIZE);
67 int dram_init_banksize(void)
69 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
70 gd->bd->bi_dram[0].size = gd->ram_size;
75 #if !CONFIG_IS_ENABLED(OF_CONTROL)
76 static const struct ns16550_platdata am33xx_serial[] = {
77 { .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
78 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
79 # ifdef CONFIG_SYS_NS16550_COM2
80 { .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
81 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
82 # ifdef CONFIG_SYS_NS16550_COM3
83 { .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
84 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
85 { .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
86 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
87 { .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
88 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
89 { .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
90 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
95 U_BOOT_DEVICES(am33xx_uarts) = {
96 { "ns16550_serial", &am33xx_serial[0] },
97 # ifdef CONFIG_SYS_NS16550_COM2
98 { "ns16550_serial", &am33xx_serial[1] },
99 # ifdef CONFIG_SYS_NS16550_COM3
100 { "ns16550_serial", &am33xx_serial[2] },
101 { "ns16550_serial", &am33xx_serial[3] },
102 { "ns16550_serial", &am33xx_serial[4] },
103 { "ns16550_serial", &am33xx_serial[5] },
109 static const struct omap_i2c_platdata am33xx_i2c[] = {
110 { I2C_BASE1, 100000, OMAP_I2C_REV_V2},
111 { I2C_BASE2, 100000, OMAP_I2C_REV_V2},
112 { I2C_BASE3, 100000, OMAP_I2C_REV_V2},
115 U_BOOT_DEVICES(am33xx_i2c) = {
116 { "i2c_omap", &am33xx_i2c[0] },
117 { "i2c_omap", &am33xx_i2c[1] },
118 { "i2c_omap", &am33xx_i2c[2] },
122 #if CONFIG_IS_ENABLED(DM_GPIO)
123 static const struct omap_gpio_platdata am33xx_gpio[] = {
124 { 0, AM33XX_GPIO0_BASE },
125 { 1, AM33XX_GPIO1_BASE },
126 { 2, AM33XX_GPIO2_BASE },
127 { 3, AM33XX_GPIO3_BASE },
129 { 4, AM33XX_GPIO4_BASE },
130 { 5, AM33XX_GPIO5_BASE },
134 U_BOOT_DEVICES(am33xx_gpios) = {
135 { "gpio_omap", &am33xx_gpio[0] },
136 { "gpio_omap", &am33xx_gpio[1] },
137 { "gpio_omap", &am33xx_gpio[2] },
138 { "gpio_omap", &am33xx_gpio[3] },
140 { "gpio_omap", &am33xx_gpio[4] },
141 { "gpio_omap", &am33xx_gpio[5] },
147 #if !CONFIG_IS_ENABLED(DM_GPIO)
148 static const struct gpio_bank gpio_bank_am33xx[] = {
149 { (void *)AM33XX_GPIO0_BASE },
150 { (void *)AM33XX_GPIO1_BASE },
151 { (void *)AM33XX_GPIO2_BASE },
152 { (void *)AM33XX_GPIO3_BASE },
154 { (void *)AM33XX_GPIO4_BASE },
155 { (void *)AM33XX_GPIO5_BASE },
159 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
162 #if defined(CONFIG_MMC_OMAP_HS)
163 int cpu_mmc_init(struct bd_info *bis)
167 ret = omap_mmc_init(0, 0, 0, -1, -1);
171 return omap_mmc_init(1, 0, 0, -1, -1);
176 * RTC only with DDR in self-refresh mode magic value, checked against during
177 * boot to see if we have a valid config. This should be in sync with the value
178 * that will be in drivers/soc/ti/pm33xx.c.
180 #define RTC_MAGIC_VAL 0x8cd0
182 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
183 #define RTC_BOARD_TYPE_SHIFT 16
185 /* AM33XX has two MUSB controllers which can be host or gadget */
186 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
187 (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
188 (!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
189 (!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))
191 static struct musb_hdrc_config musb_config = {
198 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
199 static struct ti_musb_platdata usb0 = {
200 .base = (void *)USB0_OTG_BASE,
201 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
203 .config = &musb_config,
205 .platform_ops = &musb_dsps_ops,
209 static struct ti_musb_platdata usb1 = {
210 .base = (void *)USB1_OTG_BASE,
211 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
213 .config = &musb_config,
215 .platform_ops = &musb_dsps_ops,
219 U_BOOT_DEVICES(am33xx_usbs) = {
220 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
221 { "ti-musb-peripheral", &usb0 },
222 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
223 { "ti-musb-host", &usb0 },
225 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
226 { "ti-musb-peripheral", &usb1 },
227 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
228 { "ti-musb-host", &usb1 },
232 int arch_misc_init(void)
237 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
239 /* USB 2.0 PHY Control */
240 #define CM_PHY_PWRDN (1 << 0)
241 #define CM_PHY_OTG_PWRDN (1 << 1)
242 #define OTGVDET_EN (1 << 19)
243 #define OTGSESSENDEN (1 << 20)
245 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
248 clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
249 OTGVDET_EN | OTGSESSENDEN);
251 clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
255 #ifdef CONFIG_AM335X_USB0
256 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
258 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
261 struct omap_musb_board_data otg0_board_data = {
262 .set_phy_power = am33xx_otg0_set_phy_power,
265 static struct musb_hdrc_platform_data otg0_plat = {
266 .mode = CONFIG_AM335X_USB0_MODE,
267 .config = &musb_config,
269 .platform_ops = &musb_dsps_ops,
270 .board_data = &otg0_board_data,
274 #ifdef CONFIG_AM335X_USB1
275 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
277 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
280 struct omap_musb_board_data otg1_board_data = {
281 .set_phy_power = am33xx_otg1_set_phy_power,
284 static struct musb_hdrc_platform_data otg1_plat = {
285 .mode = CONFIG_AM335X_USB1_MODE,
286 .config = &musb_config,
288 .platform_ops = &musb_dsps_ops,
289 .board_data = &otg1_board_data,
293 int arch_misc_init(void)
295 #ifdef CONFIG_AM335X_USB0
296 musb_register(&otg0_plat, &otg0_board_data,
297 (void *)USB0_OTG_BASE);
299 #ifdef CONFIG_AM335X_USB1
300 musb_register(&otg1_plat, &otg1_board_data,
301 (void *)USB1_OTG_BASE);
307 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
309 int arch_misc_init(void)
314 ret = uclass_first_device(UCLASS_MISC, &dev);
318 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
319 ret = usb_ether_init();
321 pr_err("USB ether init failed\n");
329 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
331 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
333 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
334 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
335 static void rtc32k_unlock(struct davinci_rtc *rtc)
338 * Unlock the RTC's registers. For more details please see the
339 * RTC_SS section of the TRM. In order to unlock we need to
340 * write these specific values (keys) in this order.
342 writel(RTC_KICK0R_WE, &rtc->kick0r);
343 writel(RTC_KICK1R_WE, &rtc->kick1r);
347 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
349 * Write contents of the RTC_SCRATCH1 register based on board type
350 * Two things are passed
351 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
352 * control gets to kernel, kernel reads the scratchpad register and gets to
353 * know that bootloader has rtc_only support.
355 * Second important thing is the board type (16:31). This is needed in the
356 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
357 * identify the board type and we go ahead and copy the board strings to
360 void update_rtc_magic(void)
362 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
363 u32 magic = RTC_MAGIC_VAL;
365 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
370 writel(magic, &rtc->scratch1);
375 * In the case of non-SPL based booting we'll want to call these
376 * functions a tiny bit later as it will require gd to be set and cleared
377 * and that's not true in s_init in this case so we cannot do it there.
379 int board_early_init_f(void)
383 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
390 * This function is the place to do per-board things such as ramp up the
391 * MPU clock frequency.
393 __weak void am33xx_spl_board_init(void)
397 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
398 static void rtc32k_enable(void)
400 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
404 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
405 writel((1 << 3) | (1 << 6), &rtc->osc);
409 static void uart_soft_reset(void)
411 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
414 regval = readl(&uart_base->uartsyscfg);
415 regval |= UART_RESET;
416 writel(regval, &uart_base->uartsyscfg);
417 while ((readl(&uart_base->uartsyssts) &
418 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
421 /* Disable smart idle */
422 regval = readl(&uart_base->uartsyscfg);
423 regval |= UART_SMART_IDLE_EN;
424 writel(regval, &uart_base->uartsyscfg);
427 static void watchdog_disable(void)
429 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
431 writel(0xAAAA, &wdtimer->wdtwspr);
432 while (readl(&wdtimer->wdtwwps) != 0x0)
434 writel(0x5555, &wdtimer->wdtwspr);
435 while (readl(&wdtimer->wdtwwps) != 0x0)
439 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
441 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
443 static void rtc_only(void)
445 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
446 struct prm_device_inst *prm_device =
447 (struct prm_device_inst *)PRM_DEVICE_INST;
450 void (*resume_func)(void);
452 scratch1 = readl(&rtc->scratch1);
455 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
456 * written to this register when we want to wake up from RTC only
457 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
458 * bits 0-15: RTC_MAGIC_VAL
459 * bits 16-31: board type (needed for sdram_init)
461 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
466 /* Clear RTC magic */
467 writel(0, &rtc->scratch1);
470 * Update board type based on value stored on RTC_SCRATCH1, this
471 * is done so that we don't need to read the board type from eeprom
472 * over i2c bus which is expensive
474 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
477 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
478 * are resuming from self-refresh. This avoids an unnecessary re-init
479 * of the DDR. The re-init takes time and we would need to wait for
480 * it to complete before accessing DDR to avoid L3 NOC errors.
482 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
484 rtc_only_prcm_init();
487 /* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
488 /* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
489 sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);
491 sdrc &= AM43XX_SDRAM_TYPE_MASK;
492 sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;
494 if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
495 writel(AM43XX_RDWRLVLFULL_START,
497 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
501 sdrc = readl(AM43XX_EMIF_BASE +
502 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
503 if (sdrc == AM43XX_RDWRLVLFULL_START)
507 resume_func = (void *)readl(&rtc->scratch0);
515 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
520 void early_system_init(void)
523 * The ROM will only have set up sufficient pinmux to allow for the
524 * first 4KiB NOR to be read, we must finish doing what we know of
525 * the NOR mux in this space in order to continue.
527 #ifdef CONFIG_NOR_BOOT
528 enable_norboot_pin_mux();
532 setup_early_clocks();
534 #ifdef CONFIG_SPL_BUILD
536 * Save the boot parameters passed from romcode.
537 * We cannot delay the saving further than this,
538 * to prevent overwrites.
540 save_omap_boot_params();
542 #ifdef CONFIG_DEBUG_UART_OMAP
546 #ifdef CONFIG_SPL_BUILD
550 #ifdef CONFIG_TI_I2C_BOARD_DETECT
554 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
555 /* Enable RTC32K clock */
560 #ifdef CONFIG_SPL_BUILD
561 void board_init_f(ulong dummy)
565 board_early_init_f();
567 /* dram_init must store complete ramsize in gd->ram_size */
568 gd->ram_size = get_ram_size(
569 (void *)CONFIG_SYS_SDRAM_BASE,
570 CONFIG_MAX_RAM_BANK_SIZE);
576 int arch_cpu_init_dm(void)
579 #ifndef CONFIG_SKIP_LOWLEVEL_INIT