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>
16 #include <asm/arch/cpu.h>
17 #include <asm/arch/hardware.h>
18 #include <asm/arch/omap.h>
19 #include <asm/arch/ddr_defs.h>
20 #include <asm/arch/clock.h>
21 #include <asm/arch/gpio.h>
22 #include <asm/arch/i2c.h>
23 #include <asm/arch/mem.h>
24 #include <asm/arch/mmc_host_def.h>
25 #include <asm/arch/sys_proto.h>
29 #include <asm/omap_common.h>
33 #include <linux/errno.h>
34 #include <linux/compiler.h>
35 #include <linux/usb/ch9.h>
36 #include <linux/usb/gadget.h>
37 #include <linux/usb/musb.h>
38 #include <asm/omap_musb.h>
39 #include <asm/davinci_rtc.h>
41 #define AM43XX_EMIF_BASE 0x4C000000
42 #define AM43XX_SDRAM_CONFIG_OFFSET 0x8
43 #define AM43XX_SDRAM_TYPE_MASK 0xE0000000
44 #define AM43XX_SDRAM_TYPE_SHIFT 29
45 #define AM43XX_SDRAM_TYPE_DDR3 3
46 #define AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET 0xDC
47 #define AM43XX_RDWRLVLFULL_START 0x80000000
49 DECLARE_GLOBAL_DATA_PTR;
53 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
57 /* dram_init must store complete ramsize in gd->ram_size */
58 gd->ram_size = get_ram_size(
59 (void *)CONFIG_SYS_SDRAM_BASE,
60 CONFIG_MAX_RAM_BANK_SIZE);
64 int dram_init_banksize(void)
66 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
67 gd->bd->bi_dram[0].size = gd->ram_size;
72 #if !CONFIG_IS_ENABLED(OF_CONTROL)
73 static const struct ns16550_platdata am33xx_serial[] = {
74 { .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
75 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
76 # ifdef CONFIG_SYS_NS16550_COM2
77 { .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
78 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
79 # ifdef CONFIG_SYS_NS16550_COM3
80 { .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
81 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
82 { .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
83 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
84 { .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
85 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
86 { .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
87 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
92 U_BOOT_DEVICES(am33xx_uarts) = {
93 { "ns16550_serial", &am33xx_serial[0] },
94 # ifdef CONFIG_SYS_NS16550_COM2
95 { "ns16550_serial", &am33xx_serial[1] },
96 # ifdef CONFIG_SYS_NS16550_COM3
97 { "ns16550_serial", &am33xx_serial[2] },
98 { "ns16550_serial", &am33xx_serial[3] },
99 { "ns16550_serial", &am33xx_serial[4] },
100 { "ns16550_serial", &am33xx_serial[5] },
106 static const struct omap_i2c_platdata am33xx_i2c[] = {
107 { I2C_BASE1, 100000, OMAP_I2C_REV_V2},
108 { I2C_BASE2, 100000, OMAP_I2C_REV_V2},
109 { I2C_BASE3, 100000, OMAP_I2C_REV_V2},
112 U_BOOT_DEVICES(am33xx_i2c) = {
113 { "i2c_omap", &am33xx_i2c[0] },
114 { "i2c_omap", &am33xx_i2c[1] },
115 { "i2c_omap", &am33xx_i2c[2] },
119 #if CONFIG_IS_ENABLED(DM_GPIO)
120 static const struct omap_gpio_platdata am33xx_gpio[] = {
121 { 0, AM33XX_GPIO0_BASE },
122 { 1, AM33XX_GPIO1_BASE },
123 { 2, AM33XX_GPIO2_BASE },
124 { 3, AM33XX_GPIO3_BASE },
126 { 4, AM33XX_GPIO4_BASE },
127 { 5, AM33XX_GPIO5_BASE },
131 U_BOOT_DEVICES(am33xx_gpios) = {
132 { "gpio_omap", &am33xx_gpio[0] },
133 { "gpio_omap", &am33xx_gpio[1] },
134 { "gpio_omap", &am33xx_gpio[2] },
135 { "gpio_omap", &am33xx_gpio[3] },
137 { "gpio_omap", &am33xx_gpio[4] },
138 { "gpio_omap", &am33xx_gpio[5] },
144 #if !CONFIG_IS_ENABLED(DM_GPIO)
145 static const struct gpio_bank gpio_bank_am33xx[] = {
146 { (void *)AM33XX_GPIO0_BASE },
147 { (void *)AM33XX_GPIO1_BASE },
148 { (void *)AM33XX_GPIO2_BASE },
149 { (void *)AM33XX_GPIO3_BASE },
151 { (void *)AM33XX_GPIO4_BASE },
152 { (void *)AM33XX_GPIO5_BASE },
156 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
159 #if defined(CONFIG_MMC_OMAP_HS)
160 int cpu_mmc_init(bd_t *bis)
164 ret = omap_mmc_init(0, 0, 0, -1, -1);
168 return omap_mmc_init(1, 0, 0, -1, -1);
173 * RTC only with DDR in self-refresh mode magic value, checked against during
174 * boot to see if we have a valid config. This should be in sync with the value
175 * that will be in drivers/soc/ti/pm33xx.c.
177 #define RTC_MAGIC_VAL 0x8cd0
179 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
180 #define RTC_BOARD_TYPE_SHIFT 16
182 /* AM33XX has two MUSB controllers which can be host or gadget */
183 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
184 (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
185 (!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
186 (!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))
188 static struct musb_hdrc_config musb_config = {
195 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
196 static struct ti_musb_platdata usb0 = {
197 .base = (void *)USB0_OTG_BASE,
198 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
200 .config = &musb_config,
202 .platform_ops = &musb_dsps_ops,
206 static struct ti_musb_platdata usb1 = {
207 .base = (void *)USB1_OTG_BASE,
208 .ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
210 .config = &musb_config,
212 .platform_ops = &musb_dsps_ops,
216 U_BOOT_DEVICES(am33xx_usbs) = {
217 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
218 { "ti-musb-peripheral", &usb0 },
219 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
220 { "ti-musb-host", &usb0 },
222 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
223 { "ti-musb-peripheral", &usb1 },
224 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
225 { "ti-musb-host", &usb1 },
229 int arch_misc_init(void)
234 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
236 /* USB 2.0 PHY Control */
237 #define CM_PHY_PWRDN (1 << 0)
238 #define CM_PHY_OTG_PWRDN (1 << 1)
239 #define OTGVDET_EN (1 << 19)
240 #define OTGSESSENDEN (1 << 20)
242 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
245 clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
246 OTGVDET_EN | OTGSESSENDEN);
248 clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
252 #ifdef CONFIG_AM335X_USB0
253 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
255 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
258 struct omap_musb_board_data otg0_board_data = {
259 .set_phy_power = am33xx_otg0_set_phy_power,
262 static struct musb_hdrc_platform_data otg0_plat = {
263 .mode = CONFIG_AM335X_USB0_MODE,
264 .config = &musb_config,
266 .platform_ops = &musb_dsps_ops,
267 .board_data = &otg0_board_data,
271 #ifdef CONFIG_AM335X_USB1
272 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
274 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
277 struct omap_musb_board_data otg1_board_data = {
278 .set_phy_power = am33xx_otg1_set_phy_power,
281 static struct musb_hdrc_platform_data otg1_plat = {
282 .mode = CONFIG_AM335X_USB1_MODE,
283 .config = &musb_config,
285 .platform_ops = &musb_dsps_ops,
286 .board_data = &otg1_board_data,
290 int arch_misc_init(void)
292 #ifdef CONFIG_AM335X_USB0
293 musb_register(&otg0_plat, &otg0_board_data,
294 (void *)USB0_OTG_BASE);
296 #ifdef CONFIG_AM335X_USB1
297 musb_register(&otg1_plat, &otg1_board_data,
298 (void *)USB1_OTG_BASE);
304 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
306 int arch_misc_init(void)
311 ret = uclass_first_device(UCLASS_MISC, &dev);
315 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
316 ret = usb_ether_init();
318 pr_err("USB ether init failed\n");
326 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
328 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
330 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
331 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
332 static void rtc32k_unlock(struct davinci_rtc *rtc)
335 * Unlock the RTC's registers. For more details please see the
336 * RTC_SS section of the TRM. In order to unlock we need to
337 * write these specific values (keys) in this order.
339 writel(RTC_KICK0R_WE, &rtc->kick0r);
340 writel(RTC_KICK1R_WE, &rtc->kick1r);
344 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
346 * Write contents of the RTC_SCRATCH1 register based on board type
347 * Two things are passed
348 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
349 * control gets to kernel, kernel reads the scratchpad register and gets to
350 * know that bootloader has rtc_only support.
352 * Second important thing is the board type (16:31). This is needed in the
353 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
354 * identify the board type and we go ahead and copy the board strings to
357 void update_rtc_magic(void)
359 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
360 u32 magic = RTC_MAGIC_VAL;
362 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
367 writel(magic, &rtc->scratch1);
372 * In the case of non-SPL based booting we'll want to call these
373 * functions a tiny bit later as it will require gd to be set and cleared
374 * and that's not true in s_init in this case so we cannot do it there.
376 int board_early_init_f(void)
380 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
387 * This function is the place to do per-board things such as ramp up the
388 * MPU clock frequency.
390 __weak void am33xx_spl_board_init(void)
394 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
395 static void rtc32k_enable(void)
397 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
401 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
402 writel((1 << 3) | (1 << 6), &rtc->osc);
406 static void uart_soft_reset(void)
408 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
411 regval = readl(&uart_base->uartsyscfg);
412 regval |= UART_RESET;
413 writel(regval, &uart_base->uartsyscfg);
414 while ((readl(&uart_base->uartsyssts) &
415 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
418 /* Disable smart idle */
419 regval = readl(&uart_base->uartsyscfg);
420 regval |= UART_SMART_IDLE_EN;
421 writel(regval, &uart_base->uartsyscfg);
424 static void watchdog_disable(void)
426 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
428 writel(0xAAAA, &wdtimer->wdtwspr);
429 while (readl(&wdtimer->wdtwwps) != 0x0)
431 writel(0x5555, &wdtimer->wdtwspr);
432 while (readl(&wdtimer->wdtwwps) != 0x0)
436 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
438 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
440 static void rtc_only(void)
442 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
443 struct prm_device_inst *prm_device =
444 (struct prm_device_inst *)PRM_DEVICE_INST;
447 void (*resume_func)(void);
449 scratch1 = readl(&rtc->scratch1);
452 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
453 * written to this register when we want to wake up from RTC only
454 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
455 * bits 0-15: RTC_MAGIC_VAL
456 * bits 16-31: board type (needed for sdram_init)
458 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
463 /* Clear RTC magic */
464 writel(0, &rtc->scratch1);
467 * Update board type based on value stored on RTC_SCRATCH1, this
468 * is done so that we don't need to read the board type from eeprom
469 * over i2c bus which is expensive
471 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
474 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
475 * are resuming from self-refresh. This avoids an unnecessary re-init
476 * of the DDR. The re-init takes time and we would need to wait for
477 * it to complete before accessing DDR to avoid L3 NOC errors.
479 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
481 rtc_only_prcm_init();
484 /* Check EMIF4D_SDRAM_CONFIG[31:29] SDRAM_TYPE */
485 /* Only perform leveling if SDRAM_TYPE = 3 (DDR3) */
486 sdrc = readl(AM43XX_EMIF_BASE + AM43XX_SDRAM_CONFIG_OFFSET);
488 sdrc &= AM43XX_SDRAM_TYPE_MASK;
489 sdrc >>= AM43XX_SDRAM_TYPE_SHIFT;
491 if (sdrc == AM43XX_SDRAM_TYPE_DDR3) {
492 writel(AM43XX_RDWRLVLFULL_START,
494 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
498 sdrc = readl(AM43XX_EMIF_BASE +
499 AM43XX_READ_WRITE_LEVELING_CTRL_OFFSET);
500 if (sdrc == AM43XX_RDWRLVLFULL_START)
504 resume_func = (void *)readl(&rtc->scratch0);
512 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
517 void early_system_init(void)
520 * The ROM will only have set up sufficient pinmux to allow for the
521 * first 4KiB NOR to be read, we must finish doing what we know of
522 * the NOR mux in this space in order to continue.
524 #ifdef CONFIG_NOR_BOOT
525 enable_norboot_pin_mux();
529 setup_early_clocks();
531 #ifdef CONFIG_SPL_BUILD
533 * Save the boot parameters passed from romcode.
534 * We cannot delay the saving further than this,
535 * to prevent overwrites.
537 save_omap_boot_params();
539 #ifdef CONFIG_DEBUG_UART_OMAP
543 #ifdef CONFIG_SPL_BUILD
547 #ifdef CONFIG_TI_I2C_BOARD_DETECT
551 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
552 /* Enable RTC32K clock */
557 #ifdef CONFIG_SPL_BUILD
558 void board_init_f(ulong dummy)
562 board_early_init_f();
564 /* dram_init must store complete ramsize in gd->ram_size */
565 gd->ram_size = get_ram_size(
566 (void *)CONFIG_SYS_SDRAM_BASE,
567 CONFIG_MAX_RAM_BANK_SIZE);
573 int arch_cpu_init_dm(void)
576 #ifndef CONFIG_SKIP_LOWLEVEL_INIT