1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * board.c
4  *
5  * Common board functions for AM33XX based boards
6  *
7  * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
8  */
9 
10 #include <common.h>
11 #include <dm.h>
12 #include <debug_uart.h>
13 #include <errno.h>
14 #include <ns16550.h>
15 #include <spl.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>
26 #include <asm/io.h>
27 #include <asm/emif.h>
28 #include <asm/gpio.h>
29 #include <asm/omap_common.h>
30 #include <i2c.h>
31 #include <miiphy.h>
32 #include <cpsw.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>
40 
41 DECLARE_GLOBAL_DATA_PTR;
42 
dram_init(void)43 int dram_init(void)
44 {
45 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
46 	sdram_init();
47 #endif
48 
49 	/* dram_init must store complete ramsize in gd->ram_size */
50 	gd->ram_size = get_ram_size(
51 			(void *)CONFIG_SYS_SDRAM_BASE,
52 			CONFIG_MAX_RAM_BANK_SIZE);
53 	return 0;
54 }
55 
dram_init_banksize(void)56 int dram_init_banksize(void)
57 {
58 	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
59 	gd->bd->bi_dram[0].size = gd->ram_size;
60 
61 	return 0;
62 }
63 
64 #if !CONFIG_IS_ENABLED(OF_CONTROL)
65 static const struct ns16550_platdata am33xx_serial[] = {
66 	{ .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
67 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
68 # ifdef CONFIG_SYS_NS16550_COM2
69 	{ .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
70 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
71 #  ifdef CONFIG_SYS_NS16550_COM3
72 	{ .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
73 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
74 	{ .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
75 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
76 	{ .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
77 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
78 	{ .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
79 	  .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
80 #  endif
81 # endif
82 };
83 
84 U_BOOT_DEVICES(am33xx_uarts) = {
85 	{ "ns16550_serial", &am33xx_serial[0] },
86 #  ifdef CONFIG_SYS_NS16550_COM2
87 	{ "ns16550_serial", &am33xx_serial[1] },
88 #   ifdef CONFIG_SYS_NS16550_COM3
89 	{ "ns16550_serial", &am33xx_serial[2] },
90 	{ "ns16550_serial", &am33xx_serial[3] },
91 	{ "ns16550_serial", &am33xx_serial[4] },
92 	{ "ns16550_serial", &am33xx_serial[5] },
93 #   endif
94 #  endif
95 };
96 
97 #ifdef CONFIG_DM_I2C
98 static const struct omap_i2c_platdata am33xx_i2c[] = {
99 	{ I2C_BASE1, 100000, OMAP_I2C_REV_V2},
100 	{ I2C_BASE2, 100000, OMAP_I2C_REV_V2},
101 	{ I2C_BASE3, 100000, OMAP_I2C_REV_V2},
102 };
103 
104 U_BOOT_DEVICES(am33xx_i2c) = {
105 	{ "i2c_omap", &am33xx_i2c[0] },
106 	{ "i2c_omap", &am33xx_i2c[1] },
107 	{ "i2c_omap", &am33xx_i2c[2] },
108 };
109 #endif
110 
111 #ifdef CONFIG_DM_GPIO
112 static const struct omap_gpio_platdata am33xx_gpio[] = {
113 	{ 0, AM33XX_GPIO0_BASE },
114 	{ 1, AM33XX_GPIO1_BASE },
115 	{ 2, AM33XX_GPIO2_BASE },
116 	{ 3, AM33XX_GPIO3_BASE },
117 #ifdef CONFIG_AM43XX
118 	{ 4, AM33XX_GPIO4_BASE },
119 	{ 5, AM33XX_GPIO5_BASE },
120 #endif
121 };
122 
123 U_BOOT_DEVICES(am33xx_gpios) = {
124 	{ "gpio_omap", &am33xx_gpio[0] },
125 	{ "gpio_omap", &am33xx_gpio[1] },
126 	{ "gpio_omap", &am33xx_gpio[2] },
127 	{ "gpio_omap", &am33xx_gpio[3] },
128 #ifdef CONFIG_AM43XX
129 	{ "gpio_omap", &am33xx_gpio[4] },
130 	{ "gpio_omap", &am33xx_gpio[5] },
131 #endif
132 };
133 #endif
134 #endif
135 
136 #ifndef CONFIG_DM_GPIO
137 static const struct gpio_bank gpio_bank_am33xx[] = {
138 	{ (void *)AM33XX_GPIO0_BASE },
139 	{ (void *)AM33XX_GPIO1_BASE },
140 	{ (void *)AM33XX_GPIO2_BASE },
141 	{ (void *)AM33XX_GPIO3_BASE },
142 #ifdef CONFIG_AM43XX
143 	{ (void *)AM33XX_GPIO4_BASE },
144 	{ (void *)AM33XX_GPIO5_BASE },
145 #endif
146 };
147 
148 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
149 #endif
150 
151 #if defined(CONFIG_MMC_OMAP_HS)
cpu_mmc_init(bd_t * bis)152 int cpu_mmc_init(bd_t *bis)
153 {
154 	int ret;
155 
156 	ret = omap_mmc_init(0, 0, 0, -1, -1);
157 	if (ret)
158 		return ret;
159 
160 	return omap_mmc_init(1, 0, 0, -1, -1);
161 }
162 #endif
163 
164 /*
165  * RTC only with DDR in self-refresh mode magic value, checked against during
166  * boot to see if we have a valid config. This should be in sync with the value
167  * that will be in drivers/soc/ti/pm33xx.c.
168  */
169 #define RTC_MAGIC_VAL		0x8cd0
170 
171 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
172 #define RTC_BOARD_TYPE_SHIFT	16
173 
174 /* AM33XX has two MUSB controllers which can be host or gadget */
175 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
176 	(defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
177 	(!CONFIG_IS_ENABLED(DM_USB) || !CONFIG_IS_ENABLED(OF_CONTROL)) && \
178 	(!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_MUSB_NEW_SUPPORT))
179 
180 static struct musb_hdrc_config musb_config = {
181 	.multipoint     = 1,
182 	.dyn_fifo       = 1,
183 	.num_eps        = 16,
184 	.ram_bits       = 12,
185 };
186 
187 #if CONFIG_IS_ENABLED(DM_USB) && !CONFIG_IS_ENABLED(OF_CONTROL)
188 static struct ti_musb_platdata usb0 = {
189 	.base = (void *)USB0_OTG_BASE,
190 	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl0,
191 	.plat = {
192 		.config         = &musb_config,
193 		.power          = 50,
194 		.platform_ops	= &musb_dsps_ops,
195 		},
196 };
197 
198 static struct ti_musb_platdata usb1 = {
199 	.base = (void *)USB1_OTG_BASE,
200 	.ctrl_mod_base = &((struct ctrl_dev *)CTRL_DEVICE_BASE)->usb_ctrl1,
201 	.plat = {
202 		.config         = &musb_config,
203 		.power          = 50,
204 		.platform_ops	= &musb_dsps_ops,
205 		},
206 };
207 
208 U_BOOT_DEVICES(am33xx_usbs) = {
209 #if CONFIG_AM335X_USB0_MODE == MUSB_PERIPHERAL
210 	{ "ti-musb-peripheral", &usb0 },
211 #elif CONFIG_AM335X_USB0_MODE == MUSB_HOST
212 	{ "ti-musb-host", &usb0 },
213 #endif
214 #if CONFIG_AM335X_USB1_MODE == MUSB_PERIPHERAL
215 	{ "ti-musb-peripheral", &usb1 },
216 #elif CONFIG_AM335X_USB1_MODE == MUSB_HOST
217 	{ "ti-musb-host", &usb1 },
218 #endif
219 };
220 
arch_misc_init(void)221 int arch_misc_init(void)
222 {
223 	return 0;
224 }
225 #else
226 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
227 
228 /* USB 2.0 PHY Control */
229 #define CM_PHY_PWRDN			(1 << 0)
230 #define CM_PHY_OTG_PWRDN		(1 << 1)
231 #define OTGVDET_EN			(1 << 19)
232 #define OTGSESSENDEN			(1 << 20)
233 
am33xx_usb_set_phy_power(u8 on,u32 * reg_addr)234 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
235 {
236 	if (on) {
237 		clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
238 				OTGVDET_EN | OTGSESSENDEN);
239 	} else {
240 		clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
241 	}
242 }
243 
244 #ifdef CONFIG_AM335X_USB0
am33xx_otg0_set_phy_power(struct udevice * dev,u8 on)245 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
246 {
247 	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
248 }
249 
250 struct omap_musb_board_data otg0_board_data = {
251 	.set_phy_power = am33xx_otg0_set_phy_power,
252 };
253 
254 static struct musb_hdrc_platform_data otg0_plat = {
255 	.mode           = CONFIG_AM335X_USB0_MODE,
256 	.config         = &musb_config,
257 	.power          = 50,
258 	.platform_ops	= &musb_dsps_ops,
259 	.board_data	= &otg0_board_data,
260 };
261 #endif
262 
263 #ifdef CONFIG_AM335X_USB1
am33xx_otg1_set_phy_power(struct udevice * dev,u8 on)264 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
265 {
266 	am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
267 }
268 
269 struct omap_musb_board_data otg1_board_data = {
270 	.set_phy_power = am33xx_otg1_set_phy_power,
271 };
272 
273 static struct musb_hdrc_platform_data otg1_plat = {
274 	.mode           = CONFIG_AM335X_USB1_MODE,
275 	.config         = &musb_config,
276 	.power          = 50,
277 	.platform_ops	= &musb_dsps_ops,
278 	.board_data	= &otg1_board_data,
279 };
280 #endif
281 
arch_misc_init(void)282 int arch_misc_init(void)
283 {
284 #ifdef CONFIG_AM335X_USB0
285 	musb_register(&otg0_plat, &otg0_board_data,
286 		(void *)USB0_OTG_BASE);
287 #endif
288 #ifdef CONFIG_AM335X_USB1
289 	musb_register(&otg1_plat, &otg1_board_data,
290 		(void *)USB1_OTG_BASE);
291 #endif
292 	return 0;
293 }
294 #endif
295 
296 #else	/* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
297 
arch_misc_init(void)298 int arch_misc_init(void)
299 {
300 	struct udevice *dev;
301 	int ret;
302 
303 	ret = uclass_first_device(UCLASS_MISC, &dev);
304 	if (ret || !dev)
305 		return ret;
306 
307 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
308 	ret = usb_ether_init();
309 	if (ret) {
310 		pr_err("USB ether init failed\n");
311 		return ret;
312 	}
313 #endif
314 
315 	return 0;
316 }
317 
318 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
319 
320 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
321 
322 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
323 	(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
rtc32k_unlock(struct davinci_rtc * rtc)324 static void rtc32k_unlock(struct davinci_rtc *rtc)
325 {
326 	/*
327 	 * Unlock the RTC's registers.  For more details please see the
328 	 * RTC_SS section of the TRM.  In order to unlock we need to
329 	 * write these specific values (keys) in this order.
330 	 */
331 	writel(RTC_KICK0R_WE, &rtc->kick0r);
332 	writel(RTC_KICK1R_WE, &rtc->kick1r);
333 }
334 #endif
335 
336 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
337 /*
338  * Write contents of the RTC_SCRATCH1 register based on board type
339  * Two things are passed
340  * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
341  * control gets to kernel, kernel reads the scratchpad register and gets to
342  * know that bootloader has rtc_only support.
343  *
344  * Second important thing is the board type  (16:31). This is needed in the
345  * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
346  * identify the board type and we go ahead and copy the board strings to
347  * am43xx_board_name.
348  */
update_rtc_magic(void)349 void update_rtc_magic(void)
350 {
351 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
352 	u32 magic = RTC_MAGIC_VAL;
353 
354 	magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
355 
356 	rtc32k_unlock(rtc);
357 
358 	/* write magic */
359 	writel(magic, &rtc->scratch1);
360 }
361 #endif
362 
363 /*
364  * In the case of non-SPL based booting we'll want to call these
365  * functions a tiny bit later as it will require gd to be set and cleared
366  * and that's not true in s_init in this case so we cannot do it there.
367  */
board_early_init_f(void)368 int board_early_init_f(void)
369 {
370 	prcm_init();
371 	set_mux_conf_regs();
372 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
373 	update_rtc_magic();
374 #endif
375 	return 0;
376 }
377 
378 /*
379  * This function is the place to do per-board things such as ramp up the
380  * MPU clock frequency.
381  */
am33xx_spl_board_init(void)382 __weak void am33xx_spl_board_init(void)
383 {
384 }
385 
386 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
rtc32k_enable(void)387 static void rtc32k_enable(void)
388 {
389 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
390 
391 	rtc32k_unlock(rtc);
392 
393 	/* Enable the RTC 32K OSC by setting bits 3 and 6. */
394 	writel((1 << 3) | (1 << 6), &rtc->osc);
395 }
396 #endif
397 
uart_soft_reset(void)398 static void uart_soft_reset(void)
399 {
400 	struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
401 	u32 regval;
402 
403 	regval = readl(&uart_base->uartsyscfg);
404 	regval |= UART_RESET;
405 	writel(regval, &uart_base->uartsyscfg);
406 	while ((readl(&uart_base->uartsyssts) &
407 		UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
408 		;
409 
410 	/* Disable smart idle */
411 	regval = readl(&uart_base->uartsyscfg);
412 	regval |= UART_SMART_IDLE_EN;
413 	writel(regval, &uart_base->uartsyscfg);
414 }
415 
watchdog_disable(void)416 static void watchdog_disable(void)
417 {
418 	struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
419 
420 	writel(0xAAAA, &wdtimer->wdtwspr);
421 	while (readl(&wdtimer->wdtwwps) != 0x0)
422 		;
423 	writel(0x5555, &wdtimer->wdtwspr);
424 	while (readl(&wdtimer->wdtwwps) != 0x0)
425 		;
426 }
427 
428 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
429 /*
430  * Check if we are executing rtc-only + DDR mode, and resume from it if needed
431  */
rtc_only(void)432 static void rtc_only(void)
433 {
434 	struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
435 	struct prm_device_inst *prm_device =
436 				(struct prm_device_inst *)PRM_DEVICE_INST;
437 
438 	u32 scratch1;
439 	void (*resume_func)(void);
440 
441 	scratch1 = readl(&rtc->scratch1);
442 
443 	/*
444 	 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
445 	 * written to this register when we want to wake up from RTC only
446 	 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
447 	 * bits 0-15:  RTC_MAGIC_VAL
448 	 * bits 16-31: board type (needed for sdram_init)
449 	 */
450 	if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
451 		return;
452 
453 	rtc32k_unlock(rtc);
454 
455 	/* Clear RTC magic */
456 	writel(0, &rtc->scratch1);
457 
458 	/*
459 	 * Update board type based on value stored on RTC_SCRATCH1, this
460 	 * is done so that we don't need to read the board type from eeprom
461 	 * over i2c bus which is expensive
462 	 */
463 	rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
464 
465 	/*
466 	 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
467 	 * are resuming from self-refresh. This avoids an unnecessary re-init
468 	 * of the DDR. The re-init takes time and we would need to wait for
469 	 * it to complete before accessing DDR to avoid L3 NOC errors.
470 	 */
471 	writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
472 
473 	rtc_only_prcm_init();
474 	sdram_init();
475 
476 	/* Disable EMIF_DEVOFF for normal operation and to exit self-refresh */
477 	writel(0, &prm_device->emif_ctrl);
478 
479 	resume_func = (void *)readl(&rtc->scratch0);
480 	if (resume_func)
481 		resume_func();
482 }
483 #endif
484 
s_init(void)485 void s_init(void)
486 {
487 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
488 	rtc_only();
489 #endif
490 }
491 
early_system_init(void)492 void early_system_init(void)
493 {
494 	/*
495 	 * The ROM will only have set up sufficient pinmux to allow for the
496 	 * first 4KiB NOR to be read, we must finish doing what we know of
497 	 * the NOR mux in this space in order to continue.
498 	 */
499 #ifdef CONFIG_NOR_BOOT
500 	enable_norboot_pin_mux();
501 #endif
502 	watchdog_disable();
503 	set_uart_mux_conf();
504 	setup_early_clocks();
505 	uart_soft_reset();
506 #ifdef CONFIG_SPL_BUILD
507 	/*
508 	 * Save the boot parameters passed from romcode.
509 	 * We cannot delay the saving further than this,
510 	 * to prevent overwrites.
511 	 */
512 	save_omap_boot_params();
513 #endif
514 #ifdef CONFIG_DEBUG_UART_OMAP
515 	debug_uart_init();
516 #endif
517 
518 #ifdef CONFIG_SPL_BUILD
519 	spl_early_init();
520 #endif
521 
522 #ifdef CONFIG_TI_I2C_BOARD_DETECT
523 	do_board_detect();
524 #endif
525 
526 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
527 	/* Enable RTC32K clock */
528 	rtc32k_enable();
529 #endif
530 }
531 
532 #ifdef CONFIG_SPL_BUILD
board_init_f(ulong dummy)533 void board_init_f(ulong dummy)
534 {
535 	hw_data_init();
536 	early_system_init();
537 	board_early_init_f();
538 	sdram_init();
539 	/* dram_init must store complete ramsize in gd->ram_size */
540 	gd->ram_size = get_ram_size(
541 			(void *)CONFIG_SYS_SDRAM_BASE,
542 			CONFIG_MAX_RAM_BANK_SIZE);
543 }
544 #endif
545 
546 #endif
547 
arch_cpu_init_dm(void)548 int arch_cpu_init_dm(void)
549 {
550 	hw_data_init();
551 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
552 	early_system_init();
553 #endif
554 	return 0;
555 }
556