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/mem.h>
23 #include <asm/arch/mmc_host_def.h>
24 #include <asm/arch/sys_proto.h>
25 #include <asm/io.h>
26 #include <asm/emif.h>
27 #include <asm/gpio.h>
28 #include <asm/omap_common.h>
29 #include <i2c.h>
30 #include <miiphy.h>
31 #include <cpsw.h>
32 #include <linux/errno.h>
33 #include <linux/compiler.h>
34 #include <linux/usb/ch9.h>
35 #include <linux/usb/gadget.h>
36 #include <linux/usb/musb.h>
37 #include <asm/omap_musb.h>
38 #include <asm/davinci_rtc.h>
39
40 DECLARE_GLOBAL_DATA_PTR;
41
dram_init(void)42 int dram_init(void)
43 {
44 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
45 sdram_init();
46 #endif
47
48 /* dram_init must store complete ramsize in gd->ram_size */
49 gd->ram_size = get_ram_size(
50 (void *)CONFIG_SYS_SDRAM_BASE,
51 CONFIG_MAX_RAM_BANK_SIZE);
52 return 0;
53 }
54
dram_init_banksize(void)55 int dram_init_banksize(void)
56 {
57 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
58 gd->bd->bi_dram[0].size = gd->ram_size;
59
60 return 0;
61 }
62
63 #if !CONFIG_IS_ENABLED(OF_CONTROL)
64 static const struct ns16550_platdata am33xx_serial[] = {
65 { .base = CONFIG_SYS_NS16550_COM1, .reg_shift = 2,
66 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
67 # ifdef CONFIG_SYS_NS16550_COM2
68 { .base = CONFIG_SYS_NS16550_COM2, .reg_shift = 2,
69 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
70 # ifdef CONFIG_SYS_NS16550_COM3
71 { .base = CONFIG_SYS_NS16550_COM3, .reg_shift = 2,
72 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
73 { .base = CONFIG_SYS_NS16550_COM4, .reg_shift = 2,
74 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
75 { .base = CONFIG_SYS_NS16550_COM5, .reg_shift = 2,
76 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
77 { .base = CONFIG_SYS_NS16550_COM6, .reg_shift = 2,
78 .clock = CONFIG_SYS_NS16550_CLK, .fcr = UART_FCR_DEFVAL, },
79 # endif
80 # endif
81 };
82
83 U_BOOT_DEVICES(am33xx_uarts) = {
84 { "ns16550_serial", &am33xx_serial[0] },
85 # ifdef CONFIG_SYS_NS16550_COM2
86 { "ns16550_serial", &am33xx_serial[1] },
87 # ifdef CONFIG_SYS_NS16550_COM3
88 { "ns16550_serial", &am33xx_serial[2] },
89 { "ns16550_serial", &am33xx_serial[3] },
90 { "ns16550_serial", &am33xx_serial[4] },
91 { "ns16550_serial", &am33xx_serial[5] },
92 # endif
93 # endif
94 };
95
96 #ifdef CONFIG_DM_GPIO
97 static const struct omap_gpio_platdata am33xx_gpio[] = {
98 { 0, AM33XX_GPIO0_BASE },
99 { 1, AM33XX_GPIO1_BASE },
100 { 2, AM33XX_GPIO2_BASE },
101 { 3, AM33XX_GPIO3_BASE },
102 #ifdef CONFIG_AM43XX
103 { 4, AM33XX_GPIO4_BASE },
104 { 5, AM33XX_GPIO5_BASE },
105 #endif
106 };
107
108 U_BOOT_DEVICES(am33xx_gpios) = {
109 { "gpio_omap", &am33xx_gpio[0] },
110 { "gpio_omap", &am33xx_gpio[1] },
111 { "gpio_omap", &am33xx_gpio[2] },
112 { "gpio_omap", &am33xx_gpio[3] },
113 #ifdef CONFIG_AM43XX
114 { "gpio_omap", &am33xx_gpio[4] },
115 { "gpio_omap", &am33xx_gpio[5] },
116 #endif
117 };
118 #endif
119 #endif
120
121 #ifndef CONFIG_DM_GPIO
122 static const struct gpio_bank gpio_bank_am33xx[] = {
123 { (void *)AM33XX_GPIO0_BASE },
124 { (void *)AM33XX_GPIO1_BASE },
125 { (void *)AM33XX_GPIO2_BASE },
126 { (void *)AM33XX_GPIO3_BASE },
127 #ifdef CONFIG_AM43XX
128 { (void *)AM33XX_GPIO4_BASE },
129 { (void *)AM33XX_GPIO5_BASE },
130 #endif
131 };
132
133 const struct gpio_bank *const omap_gpio_bank = gpio_bank_am33xx;
134 #endif
135
136 #if defined(CONFIG_MMC_OMAP_HS)
cpu_mmc_init(bd_t * bis)137 int cpu_mmc_init(bd_t *bis)
138 {
139 int ret;
140
141 ret = omap_mmc_init(0, 0, 0, -1, -1);
142 if (ret)
143 return ret;
144
145 return omap_mmc_init(1, 0, 0, -1, -1);
146 }
147 #endif
148
149 /*
150 * RTC only with DDR in self-refresh mode magic value, checked against during
151 * boot to see if we have a valid config. This should be in sync with the value
152 * that will be in drivers/soc/ti/pm33xx.c.
153 */
154 #define RTC_MAGIC_VAL 0x8cd0
155
156 /* Board type field bit shift for RTC only with DDR in self-refresh mode */
157 #define RTC_BOARD_TYPE_SHIFT 16
158
159 /* AM33XX has two MUSB controllers which can be host or gadget */
160 #if (defined(CONFIG_USB_MUSB_GADGET) || defined(CONFIG_USB_MUSB_HOST)) && \
161 (defined(CONFIG_AM335X_USB0) || defined(CONFIG_AM335X_USB1)) && \
162 (!defined(CONFIG_DM_USB))
163 static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
164
165 /* USB 2.0 PHY Control */
166 #define CM_PHY_PWRDN (1 << 0)
167 #define CM_PHY_OTG_PWRDN (1 << 1)
168 #define OTGVDET_EN (1 << 19)
169 #define OTGSESSENDEN (1 << 20)
170
am33xx_usb_set_phy_power(u8 on,u32 * reg_addr)171 static void am33xx_usb_set_phy_power(u8 on, u32 *reg_addr)
172 {
173 if (on) {
174 clrsetbits_le32(reg_addr, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN,
175 OTGVDET_EN | OTGSESSENDEN);
176 } else {
177 clrsetbits_le32(reg_addr, 0, CM_PHY_PWRDN | CM_PHY_OTG_PWRDN);
178 }
179 }
180
181 static struct musb_hdrc_config musb_config = {
182 .multipoint = 1,
183 .dyn_fifo = 1,
184 .num_eps = 16,
185 .ram_bits = 12,
186 };
187
188 #ifdef CONFIG_AM335X_USB0
am33xx_otg0_set_phy_power(struct udevice * dev,u8 on)189 static void am33xx_otg0_set_phy_power(struct udevice *dev, u8 on)
190 {
191 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl0);
192 }
193
194 struct omap_musb_board_data otg0_board_data = {
195 .set_phy_power = am33xx_otg0_set_phy_power,
196 };
197
198 static struct musb_hdrc_platform_data otg0_plat = {
199 .mode = CONFIG_AM335X_USB0_MODE,
200 .config = &musb_config,
201 .power = 50,
202 .platform_ops = &musb_dsps_ops,
203 .board_data = &otg0_board_data,
204 };
205 #endif
206
207 #ifdef CONFIG_AM335X_USB1
am33xx_otg1_set_phy_power(struct udevice * dev,u8 on)208 static void am33xx_otg1_set_phy_power(struct udevice *dev, u8 on)
209 {
210 am33xx_usb_set_phy_power(on, &cdev->usb_ctrl1);
211 }
212
213 struct omap_musb_board_data otg1_board_data = {
214 .set_phy_power = am33xx_otg1_set_phy_power,
215 };
216
217 static struct musb_hdrc_platform_data otg1_plat = {
218 .mode = CONFIG_AM335X_USB1_MODE,
219 .config = &musb_config,
220 .power = 50,
221 .platform_ops = &musb_dsps_ops,
222 .board_data = &otg1_board_data,
223 };
224 #endif
225
arch_misc_init(void)226 int arch_misc_init(void)
227 {
228 #ifdef CONFIG_AM335X_USB0
229 musb_register(&otg0_plat, &otg0_board_data,
230 (void *)USB0_OTG_BASE);
231 #endif
232 #ifdef CONFIG_AM335X_USB1
233 musb_register(&otg1_plat, &otg1_board_data,
234 (void *)USB1_OTG_BASE);
235 #endif
236 return 0;
237 }
238
239 #else /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
240
arch_misc_init(void)241 int arch_misc_init(void)
242 {
243 struct udevice *dev;
244 int ret;
245
246 ret = uclass_first_device(UCLASS_MISC, &dev);
247 if (ret || !dev)
248 return ret;
249
250 #if defined(CONFIG_DM_ETH) && defined(CONFIG_USB_ETHER)
251 ret = usb_ether_init();
252 if (ret) {
253 pr_err("USB ether init failed\n");
254 return ret;
255 }
256 #endif
257
258 return 0;
259 }
260
261 #endif /* CONFIG_USB_MUSB_* && CONFIG_AM335X_USB* && !CONFIG_DM_USB */
262
263 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
264
265 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC) || \
266 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT))
rtc32k_unlock(struct davinci_rtc * rtc)267 static void rtc32k_unlock(struct davinci_rtc *rtc)
268 {
269 /*
270 * Unlock the RTC's registers. For more details please see the
271 * RTC_SS section of the TRM. In order to unlock we need to
272 * write these specific values (keys) in this order.
273 */
274 writel(RTC_KICK0R_WE, &rtc->kick0r);
275 writel(RTC_KICK1R_WE, &rtc->kick1r);
276 }
277 #endif
278
279 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
280 /*
281 * Write contents of the RTC_SCRATCH1 register based on board type
282 * Two things are passed
283 * on. First 16 bits (0:15) are written with RTC_MAGIC value. Once the
284 * control gets to kernel, kernel reads the scratchpad register and gets to
285 * know that bootloader has rtc_only support.
286 *
287 * Second important thing is the board type (16:31). This is needed in the
288 * rtc_only boot where in we want to avoid costly i2c reads to eeprom to
289 * identify the board type and we go ahead and copy the board strings to
290 * am43xx_board_name.
291 */
update_rtc_magic(void)292 void update_rtc_magic(void)
293 {
294 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
295 u32 magic = RTC_MAGIC_VAL;
296
297 magic |= (rtc_only_get_board_type() << RTC_BOARD_TYPE_SHIFT);
298
299 rtc32k_unlock(rtc);
300
301 /* write magic */
302 writel(magic, &rtc->scratch1);
303 }
304 #endif
305
306 /*
307 * In the case of non-SPL based booting we'll want to call these
308 * functions a tiny bit later as it will require gd to be set and cleared
309 * and that's not true in s_init in this case so we cannot do it there.
310 */
board_early_init_f(void)311 int board_early_init_f(void)
312 {
313 prcm_init();
314 set_mux_conf_regs();
315 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
316 update_rtc_magic();
317 #endif
318 return 0;
319 }
320
321 /*
322 * This function is the place to do per-board things such as ramp up the
323 * MPU clock frequency.
324 */
am33xx_spl_board_init(void)325 __weak void am33xx_spl_board_init(void)
326 {
327 }
328
329 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
rtc32k_enable(void)330 static void rtc32k_enable(void)
331 {
332 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
333
334 rtc32k_unlock(rtc);
335
336 /* Enable the RTC 32K OSC by setting bits 3 and 6. */
337 writel((1 << 3) | (1 << 6), &rtc->osc);
338 }
339 #endif
340
uart_soft_reset(void)341 static void uart_soft_reset(void)
342 {
343 struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
344 u32 regval;
345
346 regval = readl(&uart_base->uartsyscfg);
347 regval |= UART_RESET;
348 writel(regval, &uart_base->uartsyscfg);
349 while ((readl(&uart_base->uartsyssts) &
350 UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
351 ;
352
353 /* Disable smart idle */
354 regval = readl(&uart_base->uartsyscfg);
355 regval |= UART_SMART_IDLE_EN;
356 writel(regval, &uart_base->uartsyscfg);
357 }
358
watchdog_disable(void)359 static void watchdog_disable(void)
360 {
361 struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
362
363 writel(0xAAAA, &wdtimer->wdtwspr);
364 while (readl(&wdtimer->wdtwwps) != 0x0)
365 ;
366 writel(0x5555, &wdtimer->wdtwspr);
367 while (readl(&wdtimer->wdtwwps) != 0x0)
368 ;
369 }
370
371 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
372 /*
373 * Check if we are executing rtc-only + DDR mode, and resume from it if needed
374 */
rtc_only(void)375 static void rtc_only(void)
376 {
377 struct davinci_rtc *rtc = (struct davinci_rtc *)RTC_BASE;
378 struct prm_device_inst *prm_device =
379 (struct prm_device_inst *)PRM_DEVICE_INST;
380
381 u32 scratch1;
382 void (*resume_func)(void);
383
384 scratch1 = readl(&rtc->scratch1);
385
386 /*
387 * Check RTC scratch against RTC_MAGIC_VAL, RTC_MAGIC_VAL is only
388 * written to this register when we want to wake up from RTC only
389 * with DDR in self-refresh mode. Contents of the RTC_SCRATCH1:
390 * bits 0-15: RTC_MAGIC_VAL
391 * bits 16-31: board type (needed for sdram_init)
392 */
393 if ((scratch1 & 0xffff) != RTC_MAGIC_VAL)
394 return;
395
396 rtc32k_unlock(rtc);
397
398 /* Clear RTC magic */
399 writel(0, &rtc->scratch1);
400
401 /*
402 * Update board type based on value stored on RTC_SCRATCH1, this
403 * is done so that we don't need to read the board type from eeprom
404 * over i2c bus which is expensive
405 */
406 rtc_only_update_board_type(scratch1 >> RTC_BOARD_TYPE_SHIFT);
407
408 /*
409 * Enable EMIF_DEVOFF in PRCM_PRM_EMIF_CTRL to indicate to EMIF we
410 * are resuming from self-refresh. This avoids an unnecessary re-init
411 * of the DDR. The re-init takes time and we would need to wait for
412 * it to complete before accessing DDR to avoid L3 NOC errors.
413 */
414 writel(EMIF_CTRL_DEVOFF, &prm_device->emif_ctrl);
415
416 rtc_only_prcm_init();
417 sdram_init();
418
419 /* Disable EMIF_DEVOFF for normal operation and to exit self-refresh */
420 writel(0, &prm_device->emif_ctrl);
421
422 resume_func = (void *)readl(&rtc->scratch0);
423 if (resume_func)
424 resume_func();
425 }
426 #endif
427
s_init(void)428 void s_init(void)
429 {
430 #if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_RTC_DDR_SUPPORT)
431 rtc_only();
432 #endif
433 }
434
early_system_init(void)435 void early_system_init(void)
436 {
437 /*
438 * The ROM will only have set up sufficient pinmux to allow for the
439 * first 4KiB NOR to be read, we must finish doing what we know of
440 * the NOR mux in this space in order to continue.
441 */
442 #ifdef CONFIG_NOR_BOOT
443 enable_norboot_pin_mux();
444 #endif
445 watchdog_disable();
446 set_uart_mux_conf();
447 setup_early_clocks();
448 uart_soft_reset();
449 #ifdef CONFIG_SPL_BUILD
450 /*
451 * Save the boot parameters passed from romcode.
452 * We cannot delay the saving further than this,
453 * to prevent overwrites.
454 */
455 save_omap_boot_params();
456 #endif
457 #ifdef CONFIG_DEBUG_UART_OMAP
458 debug_uart_init();
459 #endif
460 #ifdef CONFIG_TI_I2C_BOARD_DETECT
461 do_board_detect();
462 #endif
463 #ifdef CONFIG_SPL_BUILD
464 spl_early_init();
465 #endif
466 #if defined(CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC)
467 /* Enable RTC32K clock */
468 rtc32k_enable();
469 #endif
470 }
471
472 #ifdef CONFIG_SPL_BUILD
board_init_f(ulong dummy)473 void board_init_f(ulong dummy)
474 {
475 hw_data_init();
476 early_system_init();
477 board_early_init_f();
478 sdram_init();
479 /* dram_init must store complete ramsize in gd->ram_size */
480 gd->ram_size = get_ram_size(
481 (void *)CONFIG_SYS_SDRAM_BASE,
482 CONFIG_MAX_RAM_BANK_SIZE);
483 }
484 #endif
485
486 #endif
487
arch_cpu_init_dm(void)488 int arch_cpu_init_dm(void)
489 {
490 hw_data_init();
491 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
492 early_system_init();
493 #endif
494 return 0;
495 }
496