1 /*
2  * (C) Copyright 2015
3  * Heiko Schocher, DENX Software Engineering, hs@denx.de.
4  *
5  * Based on:
6  * Copyright (C) 2012 Freescale Semiconductor, Inc.
7  *
8  * Author: Fabio Estevam <fabio.estevam@freescale.com>
9  *
10  * SPDX-License-Identifier:	GPL-2.0+
11  */
12 
13 #include <asm/arch/clock.h>
14 #include <asm/arch/imx-regs.h>
15 #include <asm/arch/iomux.h>
16 #include <asm/arch/mx6-pins.h>
17 #include <linux/errno.h>
18 #include <asm/gpio.h>
19 #include <asm/mach-imx/iomux-v3.h>
20 #include <asm/mach-imx/boot_mode.h>
21 #include <asm/mach-imx/mxc_i2c.h>
22 #include <asm/mach-imx/video.h>
23 #include <mmc.h>
24 #include <fsl_esdhc.h>
25 #include <miiphy.h>
26 #include <netdev.h>
27 #include <asm/arch/mxc_hdmi.h>
28 #include <asm/arch/crm_regs.h>
29 #include <linux/fb.h>
30 #include <ipu_pixfmt.h>
31 #include <asm/io.h>
32 #include <asm/arch/sys_proto.h>
33 #include <pwm.h>
34 
35 struct i2c_pads_info i2c_pad_info3 = {
36 	.scl = {
37 		.i2c_mode = MX6_PAD_EIM_D17__I2C3_SCL | PC,
38 		.gpio_mode = MX6_PAD_EIM_D17__GPIO3_IO17 | PC,
39 		.gp = IMX_GPIO_NR(3, 17)
40 	},
41 	.sda = {
42 		.i2c_mode = MX6_PAD_EIM_D18__I2C3_SDA | PC,
43 		.gpio_mode = MX6_PAD_EIM_D18__GPIO3_IO18 | PC,
44 		.gp = IMX_GPIO_NR(3, 18)
45 	}
46 };
47 
48 iomux_v3_cfg_t const uart1_pads[] = {
49 	MX6_PAD_CSI0_DAT10__UART1_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
50 	MX6_PAD_CSI0_DAT11__UART1_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
51 };
52 
53 iomux_v3_cfg_t const uart5_pads[] = {
54 	MX6_PAD_CSI0_DAT14__UART5_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
55 	MX6_PAD_CSI0_DAT15__UART5_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL),
56 };
57 
58 iomux_v3_cfg_t const gpio_pads[] = {
59 	/* LED enable */
60 	MX6_PAD_SD4_DAT5__GPIO2_IO13 | MUX_PAD_CTRL(NO_PAD_CTRL),
61 	/* spi flash WP protect */
62 	MX6_PAD_SD4_DAT7__GPIO2_IO15 | MUX_PAD_CTRL(NO_PAD_CTRL),
63 	/* backlight enable */
64 	MX6_PAD_GPIO_2__GPIO1_IO02 | MUX_PAD_CTRL(NO_PAD_CTRL),
65 	/* LED yellow */
66 	MX6_PAD_GPIO_3__GPIO1_IO03 | MUX_PAD_CTRL(NO_PAD_CTRL),
67 	/* LED red */
68 	MX6_PAD_GPIO_4__GPIO1_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
69 	/* LED green */
70 	MX6_PAD_GPIO_5__GPIO1_IO05 | MUX_PAD_CTRL(NO_PAD_CTRL),
71 	/* LED blue */
72 	MX6_PAD_GPIO_6__GPIO1_IO06 | MUX_PAD_CTRL(NO_PAD_CTRL),
73 	/* i2c4 scl */
74 	MX6_PAD_GPIO_7__GPIO1_IO07 | MUX_PAD_CTRL(NO_PAD_CTRL),
75 	/* i2c4 sda */
76 	MX6_PAD_GPIO_8__GPIO1_IO08 | MUX_PAD_CTRL(NO_PAD_CTRL),
77 	/* spi CS 1 */
78 	MX6_PAD_EIM_A25__GPIO5_IO02 | MUX_PAD_CTRL(NO_PAD_CTRL),
79 };
80 
81 static iomux_v3_cfg_t const misc_pads[] = {
82 	MX6_PAD_GPIO_1__USB_OTG_ID		| MUX_PAD_CTRL(NO_PAD_CTRL),
83 	/* OTG Power enable */
84 	MX6_PAD_EIM_D31__GPIO3_IO31		| MUX_PAD_CTRL(NO_PAD_CTRL),
85 	MX6_PAD_KEY_ROW4__GPIO4_IO15		| MUX_PAD_CTRL(NO_PAD_CTRL),
86 };
87 
88 iomux_v3_cfg_t const enet_pads[] = {
89 	MX6_PAD_GPIO_16__ENET_REF_CLK	| MUX_PAD_CTRL(0x4001b0a8),
90 	MX6_PAD_ENET_MDIO__ENET_MDIO	| MUX_PAD_CTRL(ENET_PAD_CTRL),
91 	MX6_PAD_ENET_MDC__ENET_MDC	| MUX_PAD_CTRL(ENET_PAD_CTRL),
92 	MX6_PAD_ENET_TXD0__ENET_TX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
93 	MX6_PAD_ENET_TXD1__ENET_TX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
94 	MX6_PAD_ENET_TX_EN__ENET_TX_EN	| MUX_PAD_CTRL(ENET_PAD_CTRL),
95 	MX6_PAD_ENET_RX_ER__ENET_RX_ER	| MUX_PAD_CTRL(ENET_PAD_CTRL),
96 	MX6_PAD_ENET_RXD0__ENET_RX_DATA0 | MUX_PAD_CTRL(ENET_PAD_CTRL),
97 	MX6_PAD_ENET_RXD1__ENET_RX_DATA1 | MUX_PAD_CTRL(ENET_PAD_CTRL),
98 	MX6_PAD_ENET_CRS_DV__ENET_RX_EN	| MUX_PAD_CTRL(ENET_PAD_CTRL),
99 };
100 
101 static void setup_iomux_enet(void)
102 {
103 	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
104 
105 	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
106 
107 	/* set GPIO_16 as ENET_REF_CLK_OUT */
108 	setbits_le32(&iomux->gpr[1], IOMUXC_GPR1_ENET_CLK_SEL_MASK);
109 }
110 
111 static iomux_v3_cfg_t const backlight_pads[] = {
112 	MX6_PAD_GPIO_9__PWM1_OUT | MUX_PAD_CTRL(NO_PAD_CTRL),
113 	MX6_PAD_SD4_DAT1__PWM3_OUT | MUX_PAD_CTRL(NO_PAD_CTRL),
114 	MX6_PAD_GPIO_2__GPIO1_IO02 | MUX_PAD_CTRL(NO_PAD_CTRL),
115 };
116 
117 iomux_v3_cfg_t const ecspi4_pads[] = {
118 	MX6_PAD_EIM_D21__ECSPI4_SCLK | MUX_PAD_CTRL(NO_PAD_CTRL),
119 	MX6_PAD_EIM_D22__ECSPI4_MISO | MUX_PAD_CTRL(NO_PAD_CTRL),
120 	MX6_PAD_EIM_D28__ECSPI4_MOSI | MUX_PAD_CTRL(NO_PAD_CTRL),
121 	MX6_PAD_EIM_D20__GPIO3_IO20 | MUX_PAD_CTRL(NO_PAD_CTRL),
122 };
123 
124 static iomux_v3_cfg_t const display_pads[] = {
125 	MX6_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK | MUX_PAD_CTRL(DISP_PAD_CTRL),
126 	MX6_PAD_DI0_PIN15__IPU1_DI0_PIN15,
127 	MX6_PAD_DI0_PIN2__IPU1_DI0_PIN02,
128 	MX6_PAD_DI0_PIN3__IPU1_DI0_PIN03,
129 	MX6_PAD_DI0_PIN4__GPIO4_IO20,
130 	MX6_PAD_DISP0_DAT0__IPU1_DISP0_DATA00,
131 	MX6_PAD_DISP0_DAT1__IPU1_DISP0_DATA01,
132 	MX6_PAD_DISP0_DAT2__IPU1_DISP0_DATA02,
133 	MX6_PAD_DISP0_DAT3__IPU1_DISP0_DATA03,
134 	MX6_PAD_DISP0_DAT4__IPU1_DISP0_DATA04,
135 	MX6_PAD_DISP0_DAT5__IPU1_DISP0_DATA05,
136 	MX6_PAD_DISP0_DAT6__IPU1_DISP0_DATA06,
137 	MX6_PAD_DISP0_DAT7__IPU1_DISP0_DATA07,
138 	MX6_PAD_DISP0_DAT8__IPU1_DISP0_DATA08,
139 	MX6_PAD_DISP0_DAT9__IPU1_DISP0_DATA09,
140 	MX6_PAD_DISP0_DAT10__IPU1_DISP0_DATA10,
141 	MX6_PAD_DISP0_DAT11__IPU1_DISP0_DATA11,
142 	MX6_PAD_DISP0_DAT12__IPU1_DISP0_DATA12,
143 	MX6_PAD_DISP0_DAT13__IPU1_DISP0_DATA13,
144 	MX6_PAD_DISP0_DAT14__IPU1_DISP0_DATA14,
145 	MX6_PAD_DISP0_DAT15__IPU1_DISP0_DATA15,
146 	MX6_PAD_DISP0_DAT16__IPU1_DISP0_DATA16,
147 	MX6_PAD_DISP0_DAT17__IPU1_DISP0_DATA17,
148 	MX6_PAD_DISP0_DAT18__IPU1_DISP0_DATA18,
149 	MX6_PAD_DISP0_DAT19__IPU1_DISP0_DATA19,
150 	MX6_PAD_DISP0_DAT20__IPU1_DISP0_DATA20,
151 	MX6_PAD_DISP0_DAT21__IPU1_DISP0_DATA21,
152 	MX6_PAD_DISP0_DAT22__IPU1_DISP0_DATA22,
153 	MX6_PAD_DISP0_DAT23__IPU1_DISP0_DATA23,
154 };
155 
156 int board_spi_cs_gpio(unsigned bus, unsigned cs)
157 {
158 	return (bus == CONFIG_SF_DEFAULT_BUS && cs == CONFIG_SF_DEFAULT_CS)
159 		? (IMX_GPIO_NR(3, 20)) : -1;
160 }
161 
162 static void setup_spi(void)
163 {
164 	int i;
165 
166 	imx_iomux_v3_setup_multiple_pads(ecspi4_pads, ARRAY_SIZE(ecspi4_pads));
167 	for (i = 0; i < 3; i++)
168 		enable_spi_clk(true, i);
169 
170 	/* set cs1 to high */
171 	gpio_direction_output(ECSPI4_CS1, 1);
172 }
173 
174 static void setup_iomux_uart(void)
175 {
176 	imx_iomux_v3_setup_multiple_pads(uart5_pads, ARRAY_SIZE(uart5_pads));
177 }
178 
179 int board_eth_init(bd_t *bis)
180 {
181 	struct iomuxc *iomuxc_regs =
182 				(struct iomuxc *)IOMUXC_BASE_ADDR;
183 	int ret;
184 
185 	/* clear gpr1[14], gpr1[18:17] to select anatop clock */
186 	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC_MASK, 0);
187 
188 	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
189 	if (ret)
190 		return ret;
191 
192 	setup_iomux_enet();
193 	return cpu_eth_init(bis);
194 }
195 
196 static void enable_lvds(struct display_info_t const *dev)
197 {
198 	imx_iomux_v3_setup_multiple_pads(
199 		display_pads,
200 		 ARRAY_SIZE(display_pads));
201 	imx_iomux_v3_setup_multiple_pads(
202 		backlight_pads,
203 		 ARRAY_SIZE(backlight_pads));
204 
205 	/* enable backlight PWM 3 */
206 	if (pwm_init(2, 0, 0))
207 		goto error;
208 	/* duty cycle 500ns, period: 3000ns */
209 	if (pwm_config(2, 500, 3000))
210 		goto error;
211 	if (pwm_enable(2))
212 		goto error;
213 	return;
214 
215 error:
216 	puts("error init pwm for backlight\n");
217 	return;
218 }
219 
220 static void setup_display(void)
221 {
222 	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
223 	int reg;
224 
225 	enable_ipu_clock();
226 
227 	reg = readl(&mxc_ccm->cs2cdr);
228 	/* select pll 5 clock */
229 	reg &= MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK;
230 	reg &= MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK;
231 	writel(reg, &mxc_ccm->cs2cdr);
232 
233 	imx_iomux_v3_setup_multiple_pads(backlight_pads,
234 					 ARRAY_SIZE(backlight_pads));
235 }
236 
237 static void setup_iomux_gpio(void)
238 {
239 	imx_iomux_v3_setup_multiple_pads(gpio_pads, ARRAY_SIZE(gpio_pads));
240 }
241 
242 int board_early_init_f(void)
243 {
244 	setup_iomux_uart();
245 	setup_iomux_gpio();
246 
247 	setup_display();
248 	return 0;
249 }
250 
251 
252 static void setup_i2c4(void)
253 {
254 	/* i2c4 not used, set it to gpio input */
255 	gpio_request(IMX_GPIO_NR(1, 7), "i2c4_scl");
256 	gpio_direction_input(IMX_GPIO_NR(1, 7));
257 	gpio_request(IMX_GPIO_NR(1, 8), "i2c4_sda");
258 	gpio_direction_input(IMX_GPIO_NR(1, 8));
259 }
260 
261 static void setup_board_gpio(void)
262 {
263 	/* enable LED */
264 	gpio_request(IMX_GPIO_NR(2, 13), "LED ena");
265 	gpio_direction_output(IMX_GPIO_NR(2, 13), 0);
266 
267 	gpio_request(IMX_GPIO_NR(1, 3), "LED yellow");
268 	gpio_direction_output(IMX_GPIO_NR(1, 3), 1);
269 	gpio_request(IMX_GPIO_NR(1, 4), "LED red");
270 	gpio_direction_output(IMX_GPIO_NR(1, 4), 1);
271 	gpio_request(IMX_GPIO_NR(1, 5), "LED green");
272 	gpio_direction_output(IMX_GPIO_NR(1, 5), 1);
273 	gpio_request(IMX_GPIO_NR(1, 6), "LED blue");
274 	gpio_direction_output(IMX_GPIO_NR(1, 6), 1);
275 }
276 
277 static void setup_board_spi(void)
278 {
279 }
280