1 /*
2  * Copyright (C) 2016 samtec automotive software & electronics gmbh
3  *
4  * Author: Christoph Fritz <chf.fritz@googlemail.com>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 
9 #include <asm/arch/clock.h>
10 #include <asm/arch/crm_regs.h>
11 #include <asm/arch/iomux.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch/mx6-pins.h>
14 #include <asm/arch/sys_proto.h>
15 #include <asm/gpio.h>
16 #include <asm/mach-imx/iomux-v3.h>
17 #include <asm/io.h>
18 #include <asm/mach-imx/mxc_i2c.h>
19 #include <linux/sizes.h>
20 #include <common.h>
21 #include <fsl_esdhc.h>
22 #include <mmc.h>
23 #include <i2c.h>
24 #include <miiphy.h>
25 #include <netdev.h>
26 #include <power/pmic.h>
27 #include <power/pfuze100_pmic.h>
28 #include <usb.h>
29 #include <usb/ehci-ci.h>
30 #include <pwm.h>
31 #include <wait_bit.h>
32 
33 DECLARE_GLOBAL_DATA_PTR;
34 
35 #define UART_PAD_CTRL  (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP |	\
36 	PAD_CTL_PKE | PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm |	\
37 	PAD_CTL_SRE_FAST)
38 
39 #define ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP | PAD_CTL_PKE |	\
40 	PAD_CTL_SPEED_HIGH | PAD_CTL_DSE_48ohm |		\
41 	PAD_CTL_SRE_FAST)
42 
43 #define ENET_CLK_PAD_CTRL  PAD_CTL_DSE_34ohm
44 
45 #define ENET_RX_PAD_CTRL  (PAD_CTL_PKE |			\
46 	PAD_CTL_PUS_100K_DOWN | PAD_CTL_SPEED_HIGH |		\
47 	PAD_CTL_SRE_FAST)
48 
49 #define I2C_PAD_CTRL  (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP |	\
50 	PAD_CTL_PKE | PAD_CTL_ODE | PAD_CTL_SPEED_MED |		\
51 	PAD_CTL_DSE_40ohm)
52 
53 #define USDHC_CLK_PAD_CTRL  (PAD_CTL_HYS | PAD_CTL_SPEED_MED |	\
54 	PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST)
55 
56 #define USDHC_PAD_CTRL  (PAD_CTL_HYS | PAD_CTL_PUS_47K_UP |	\
57 	PAD_CTL_PKE |  PAD_CTL_SPEED_MED | PAD_CTL_DSE_80ohm |	\
58 	PAD_CTL_SRE_FAST)
59 
60 #define GPIO_PAD_CTRL  (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP |	\
61 	PAD_CTL_PKE)
62 
63 int dram_init(void)
64 {
65 	gd->ram_size = imx_ddr_size();
66 
67 	return 0;
68 }
69 
70 static iomux_v3_cfg_t const uart1_pads[] = {
71 	MX6_PAD_GPIO1_IO04__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
72 	MX6_PAD_GPIO1_IO05__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
73 };
74 
75 static iomux_v3_cfg_t const usdhc2_pads[] = {
76 	MX6_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_CLK_PAD_CTRL),
77 	MX6_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
78 	MX6_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
79 	MX6_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
80 	MX6_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
81 	MX6_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
82 	MX6_PAD_LCD1_VSYNC__GPIO3_IO_28 | MUX_PAD_CTRL(GPIO_PAD_CTRL),
83 };
84 
85 static iomux_v3_cfg_t const usdhc4_pads[] = {
86 	MX6_PAD_SD4_CLK__USDHC4_CLK | MUX_PAD_CTRL(USDHC_CLK_PAD_CTRL),
87 	MX6_PAD_SD4_CMD__USDHC4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
88 	MX6_PAD_SD4_DATA0__USDHC4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
89 	MX6_PAD_SD4_DATA1__USDHC4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
90 	MX6_PAD_SD4_DATA2__USDHC4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
91 	MX6_PAD_SD4_DATA3__USDHC4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
92 	MX6_PAD_SD4_DATA4__USDHC4_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
93 	MX6_PAD_SD4_DATA5__USDHC4_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
94 	MX6_PAD_SD4_DATA6__USDHC4_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
95 	MX6_PAD_SD4_DATA7__USDHC4_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
96 };
97 
98 static iomux_v3_cfg_t const fec1_pads[] = {
99 	MX6_PAD_ENET1_MDC__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
100 	MX6_PAD_ENET1_MDIO__ENET1_MDIO | MUX_PAD_CTRL(ENET_PAD_CTRL),
101 	MX6_PAD_RGMII1_RD0__ENET1_RX_DATA_0 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
102 	MX6_PAD_RGMII1_RD1__ENET1_RX_DATA_1 | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
103 	MX6_PAD_RGMII1_TD0__ENET1_TX_DATA_0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
104 	MX6_PAD_RGMII1_TD1__ENET1_TX_DATA_1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
105 	MX6_PAD_RGMII1_RX_CTL__ENET1_RX_EN | MUX_PAD_CTRL(ENET_RX_PAD_CTRL),
106 	MX6_PAD_RGMII1_TX_CTL__ENET1_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
107 	MX6_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 | MUX_PAD_CTRL(ENET_CLK_PAD_CTRL) |
108 		MUX_MODE_SION,
109 	/* LAN8720 PHY Reset */
110 	MX6_PAD_RGMII1_TD3__GPIO5_IO_9 | MUX_PAD_CTRL(NO_PAD_CTRL),
111 };
112 
113 static iomux_v3_cfg_t const pwm_led_pads[] = {
114 	MX6_PAD_RGMII2_RD2__PWM2_OUT | MUX_PAD_CTRL(NO_PAD_CTRL), /* green */
115 	MX6_PAD_RGMII2_TD2__PWM6_OUT | MUX_PAD_CTRL(NO_PAD_CTRL), /* red */
116 	MX6_PAD_RGMII2_RD3__PWM1_OUT | MUX_PAD_CTRL(NO_PAD_CTRL), /* blue */
117 };
118 
119 static void setup_iomux_uart(void)
120 {
121 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
122 }
123 
124 #define PHY_RESET IMX_GPIO_NR(5, 9)
125 
126 int board_eth_init(bd_t *bis)
127 {
128 	struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
129 	int ret;
130 	unsigned char eth1addr[6];
131 
132 	/* just to get secound mac address */
133 	imx_get_mac_from_fuse(1, eth1addr);
134 	if (!env_get("eth1addr") && is_valid_ethaddr(eth1addr))
135 		eth_env_set_enetaddr("eth1addr", eth1addr);
136 
137 	imx_iomux_v3_setup_multiple_pads(fec1_pads, ARRAY_SIZE(fec1_pads));
138 
139 	/*
140 	 * Generate phy reference clock via pin IOMUX ENET_REF_CLK1/2 by erasing
141 	 * ENET1/2_TX_CLK_DIR gpr1[14:13], so that reference clock is driven by
142 	 * ref_enetpll0/1 and enable ENET1/2_TX_CLK output driver.
143 	 */
144 	clrsetbits_le32(&iomuxc_regs->gpr[1],
145 			IOMUX_GPR1_FEC1_CLOCK_MUX2_SEL_MASK |
146 			IOMUX_GPR1_FEC2_CLOCK_MUX2_SEL_MASK,
147 			IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK |
148 			IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK);
149 
150 	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
151 	if (ret)
152 		goto eth_fail;
153 
154 	/* reset phy */
155 	gpio_direction_output(PHY_RESET, 0);
156 	mdelay(16);
157 	gpio_set_value(PHY_RESET, 1);
158 	mdelay(1);
159 
160 	ret = fecmxc_initialize_multi(bis, 0, CONFIG_FEC_MXC_PHYADDR,
161 					IMX_FEC_BASE);
162 	if (ret)
163 		goto eth_fail;
164 
165 	return ret;
166 
167 eth_fail:
168 	printf("FEC MXC: %s:failed (%i)\n", __func__, ret);
169 	gpio_set_value(PHY_RESET, 0);
170 	return ret;
171 }
172 
173 #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
174 /* I2C1 for PMIC */
175 static struct i2c_pads_info i2c_pad_info1 = {
176 	.scl = {
177 		.i2c_mode = MX6_PAD_GPIO1_IO00__I2C1_SCL | PC,
178 		.gpio_mode = MX6_PAD_GPIO1_IO00__GPIO1_IO_0 | PC,
179 		.gp = IMX_GPIO_NR(1, 0),
180 	},
181 	.sda = {
182 		.i2c_mode = MX6_PAD_GPIO1_IO01__I2C1_SDA | PC,
183 		.gpio_mode = MX6_PAD_GPIO1_IO01__GPIO1_IO_1 | PC,
184 		.gp = IMX_GPIO_NR(1, 1),
185 	},
186 };
187 
188 static struct pmic *pfuze_init(unsigned char i2cbus)
189 {
190 	struct pmic *p;
191 	int ret;
192 	u32 reg;
193 
194 	ret = power_pfuze100_init(i2cbus);
195 	if (ret)
196 		return NULL;
197 
198 	p = pmic_get("PFUZE100");
199 	ret = pmic_probe(p);
200 	if (ret)
201 		return NULL;
202 
203 	pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
204 	printf("PMIC:  PFUZE100 ID=0x%02x\n", reg);
205 
206 	/* Set SW1AB stanby volage to 0.975V */
207 	pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
208 	reg &= ~SW1x_STBY_MASK;
209 	reg |= SW1x_0_975V;
210 	pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);
211 
212 	/* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
213 	pmic_reg_read(p, PFUZE100_SW1ABCONF, &reg);
214 	reg &= ~SW1xCONF_DVSSPEED_MASK;
215 	reg |= SW1xCONF_DVSSPEED_4US;
216 	pmic_reg_write(p, PFUZE100_SW1ABCONF, reg);
217 
218 	/* Set SW1C standby voltage to 0.975V */
219 	pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
220 	reg &= ~SW1x_STBY_MASK;
221 	reg |= SW1x_0_975V;
222 	pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);
223 
224 	/* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
225 	pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
226 	reg &= ~SW1xCONF_DVSSPEED_MASK;
227 	reg |= SW1xCONF_DVSSPEED_4US;
228 	pmic_reg_write(p, PFUZE100_SW1CCONF, reg);
229 
230 	return p;
231 }
232 
233 static int pfuze_mode_init(struct pmic *p, u32 mode)
234 {
235 	unsigned char offset, i, switch_num;
236 	u32 id;
237 	int ret;
238 
239 	pmic_reg_read(p, PFUZE100_DEVICEID, &id);
240 	id = id & 0xf;
241 
242 	if (id == 0) {
243 		switch_num = 6;
244 		offset = PFUZE100_SW1CMODE;
245 	} else if (id == 1) {
246 		switch_num = 4;
247 		offset = PFUZE100_SW2MODE;
248 	} else {
249 		printf("Not supported, id=%d\n", id);
250 		return -EINVAL;
251 	}
252 
253 	ret = pmic_reg_write(p, PFUZE100_SW1ABMODE, mode);
254 	if (ret < 0) {
255 		printf("Set SW1AB mode error!\n");
256 		return ret;
257 	}
258 
259 	for (i = 0; i < switch_num - 1; i++) {
260 		ret = pmic_reg_write(p, offset + i * SWITCH_SIZE, mode);
261 		if (ret < 0) {
262 			printf("Set switch 0x%x mode error!\n",
263 			       offset + i * SWITCH_SIZE);
264 			return ret;
265 		}
266 	}
267 
268 	return ret;
269 }
270 
271 int power_init_board(void)
272 {
273 	struct pmic *p;
274 	int ret;
275 
276 	p = pfuze_init(I2C_PMIC);
277 	if (!p)
278 		return -ENODEV;
279 
280 	ret = pfuze_mode_init(p, APS_PFM);
281 	if (ret < 0)
282 		return ret;
283 
284 	return 0;
285 }
286 
287 #ifdef CONFIG_USB_EHCI_MX6
288 static iomux_v3_cfg_t const usb_otg_pads[] = {
289 	/* OGT1 */
290 	MX6_PAD_GPIO1_IO09__USB_OTG1_PWR | MUX_PAD_CTRL(NO_PAD_CTRL),
291 	MX6_PAD_GPIO1_IO10__ANATOP_OTG1_ID | MUX_PAD_CTRL(NO_PAD_CTRL),
292 	/* OTG2 */
293 	MX6_PAD_GPIO1_IO12__USB_OTG2_PWR | MUX_PAD_CTRL(NO_PAD_CTRL)
294 };
295 
296 static void setup_iomux_usb(void)
297 {
298 	imx_iomux_v3_setup_multiple_pads(usb_otg_pads,
299 					 ARRAY_SIZE(usb_otg_pads));
300 }
301 
302 int board_usb_phy_mode(int port)
303 {
304 	if (port == 1)
305 		return USB_INIT_HOST;
306 	else
307 		return usb_phy_mode(port);
308 }
309 #endif
310 
311 #ifdef CONFIG_PWM_IMX
312 static int set_pwm_leds(void)
313 {
314 	int ret;
315 
316 	imx_iomux_v3_setup_multiple_pads(pwm_led_pads,
317 					 ARRAY_SIZE(pwm_led_pads));
318 	/* enable backlight PWM 2, green LED */
319 	ret = pwm_init(1, 0, 0);
320 	if (ret)
321 		goto error;
322 	/* duty cycle 200ns, period: 8000ns */
323 	ret = pwm_config(1, 200, 8000);
324 	if (ret)
325 		goto error;
326 	ret = pwm_enable(1);
327 	if (ret)
328 		goto error;
329 
330 	/* enable backlight PWM 1, blue LED */
331 	ret = pwm_init(0, 0, 0);
332 	if (ret)
333 		goto error;
334 	/* duty cycle 200ns, period: 8000ns */
335 	ret = pwm_config(0, 200, 8000);
336 	if (ret)
337 		goto error;
338 	ret = pwm_enable(0);
339 	if (ret)
340 		goto error;
341 
342 	/* enable backlight PWM 6, red LED */
343 	ret = pwm_init(5, 0, 0);
344 	if (ret)
345 		goto error;
346 	/* duty cycle 200ns, period: 8000ns */
347 	ret = pwm_config(5, 200, 8000);
348 	if (ret)
349 		goto error;
350 	ret = pwm_enable(5);
351 
352 error:
353 	return ret;
354 }
355 #else
356 static int set_pwm_leds(void)
357 {
358 	return 0;
359 }
360 #endif
361 
362 #define ADCx_HC0        0x00
363 #define ADCx_HS         0x08
364 #define ADCx_HS_C0      BIT(0)
365 #define ADCx_R0         0x0c
366 #define ADCx_CFG        0x14
367 #define ADCx_CFG_SWMODE 0x308
368 #define ADCx_GC         0x18
369 #define ADCx_GC_CAL     BIT(7)
370 
371 static int read_adc(u32 *val)
372 {
373 	int ret;
374 	void __iomem *b = map_physmem(ADC1_BASE_ADDR, 0x100, MAP_NOCACHE);
375 
376 	/* use software mode */
377 	writel(ADCx_CFG_SWMODE, b + ADCx_CFG);
378 
379 	/* start auto calibration */
380 	setbits_le32(b + ADCx_GC, ADCx_GC_CAL);
381 	ret = wait_for_bit_le32(b + ADCx_GC, ADCx_GC_CAL, ADCx_GC_CAL, 10, 0);
382 	if (ret)
383 		goto adc_exit;
384 
385 	/* start conversion */
386 	writel(0, b + ADCx_HC0);
387 
388 	/* wait for conversion */
389 	ret = wait_for_bit_le32(b + ADCx_HS, ADCx_HS_C0, ADCx_HS_C0, 10, 0);
390 	if (ret)
391 		goto adc_exit;
392 
393 	/* read result */
394 	*val = readl(b + ADCx_R0);
395 
396 adc_exit:
397 	if (ret)
398 		printf("ADC failure (ret=%i)\n", ret);
399 	unmap_physmem(b, MAP_NOCACHE);
400 	return ret;
401 }
402 
403 #define VAL_UPPER	2498
404 #define VAL_LOWER	1550
405 
406 static int set_pin_state(void)
407 {
408 	u32 val;
409 	int ret;
410 
411 	ret = read_adc(&val);
412 	if (ret)
413 		return ret;
414 
415 	if (val >= VAL_UPPER)
416 		env_set("pin_state", "connected");
417 	else if (val < VAL_UPPER && val > VAL_LOWER)
418 		env_set("pin_state", "open");
419 	else
420 		env_set("pin_state", "button");
421 
422 	return ret;
423 }
424 
425 int board_late_init(void)
426 {
427 	int ret;
428 
429 	ret = set_pwm_leds();
430 	if (ret)
431 		return ret;
432 
433 	ret = set_pin_state();
434 
435 	return ret;
436 }
437 
438 int board_early_init_f(void)
439 {
440 	setup_iomux_uart();
441 
442 	setup_iomux_usb();
443 
444 	return 0;
445 }
446 
447 static struct fsl_esdhc_cfg usdhc_cfg[2] = {
448 	{USDHC4_BASE_ADDR, 0, 8},
449 	{USDHC2_BASE_ADDR, 0, 4},
450 };
451 
452 #define USDHC2_CD_GPIO IMX_GPIO_NR(3, 28)
453 
454 int board_mmc_getcd(struct mmc *mmc)
455 {
456 	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
457 
458 	if (cfg->esdhc_base == USDHC4_BASE_ADDR)
459 		return 1;
460 	if (cfg->esdhc_base == USDHC2_BASE_ADDR)
461 		return !gpio_get_value(USDHC2_CD_GPIO);
462 
463 	return -EINVAL;
464 }
465 
466 int board_mmc_init(bd_t *bis)
467 {
468 	int ret;
469 
470 	/*
471 	 * According to the board_mmc_init() the following map is done:
472 	 * (U-Boot device node)    (Physical Port)
473 	 * mmc0                    USDHC4
474 	 * mmc1                    USDHC2
475 	 */
476 	imx_iomux_v3_setup_multiple_pads(
477 		usdhc4_pads, ARRAY_SIZE(usdhc4_pads));
478 	usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
479 
480 	imx_iomux_v3_setup_multiple_pads(
481 		usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
482 	gpio_direction_input(USDHC2_CD_GPIO);
483 	usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
484 
485 	ret = fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
486 	if (ret) {
487 		printf("Warning: failed to initialize USDHC4\n");
488 		return ret;
489 	}
490 
491 	ret = fsl_esdhc_initialize(bis, &usdhc_cfg[1]);
492 	if (ret) {
493 		printf("Warning: failed to initialize USDHC2\n");
494 		return ret;
495 	}
496 
497 	return 0;
498 }
499 
500 int board_init(void)
501 {
502 	/* Address of boot parameters */
503 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
504 
505 #ifdef CONFIG_SYS_I2C_MXC
506 	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
507 #endif
508 
509 	return 0;
510 }
511 
512 int checkboard(void)
513 {
514 	puts("Board: VIN|ING 2000\n");
515 
516 	return 0;
517 }
518