1 /*
2  * Copyright (C) 2012 Freescale Semiconductor, Inc.
3  * Fabio Estevam <fabio.estevam@freescale.com>
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #include <common.h>
25 #include <linux/list.h>
26 #include <asm/gpio.h>
27 #include <asm/arch/iomux.h>
28 #include <linux/fb.h>
29 #include <ipu_pixfmt.h>
30 
31 #define MX51EVK_LCD_3V3		IMX_GPIO_NR(4, 9)
32 #define MX51EVK_LCD_5V		IMX_GPIO_NR(4, 10)
33 #define MX51EVK_LCD_BACKLIGHT	IMX_GPIO_NR(3, 4)
34 
35 static struct fb_videomode const claa_wvga = {
36 	.name		= "CLAA07LC0ACW",
37 	.refresh	= 57,
38 	.xres		= 800,
39 	.yres		= 480,
40 	.pixclock	= 37037,
41 	.left_margin	= 40,
42 	.right_margin	= 60,
43 	.upper_margin	= 10,
44 	.lower_margin	= 10,
45 	.hsync_len	= 20,
46 	.vsync_len	= 10,
47 	.sync		= 0,
48 	.vmode		= FB_VMODE_NONINTERLACED
49 };
50 
51 static struct fb_videomode const dvi = {
52 	.name		= "DVI panel",
53 	.refresh	= 60,
54 	.xres		= 1024,
55 	.yres		= 768,
56 	.pixclock	= 15385,
57 	.left_margin	= 220,
58 	.right_margin	= 40,
59 	.upper_margin	= 21,
60 	.lower_margin	= 7,
61 	.hsync_len	= 60,
62 	.vsync_len	= 10,
63 	.sync		= 0,
64 	.vmode		= FB_VMODE_NONINTERLACED
65 };
66 
67 void setup_iomux_lcd(void)
68 {
69 	/* DI2_PIN15 */
70 	mxc_request_iomux(MX51_PIN_DI_GP4, IOMUX_CONFIG_ALT4);
71 
72 	/* Pad settings for MX51_PIN_DI2_DISP_CLK */
73 	mxc_iomux_set_pad(MX51_PIN_DI2_DISP_CLK, PAD_CTL_HYS_NONE |
74 			  PAD_CTL_PKE_ENABLE | PAD_CTL_PUE_KEEPER |
75 			  PAD_CTL_DRV_MAX | PAD_CTL_SRE_SLOW);
76 
77 	/* Turn on 3.3V voltage for LCD */
78 	mxc_request_iomux(MX51_PIN_CSI2_D12, IOMUX_CONFIG_ALT3);
79 	gpio_direction_output(MX51EVK_LCD_3V3, 1);
80 
81 	/* Turn on 5V voltage for LCD */
82 	mxc_request_iomux(MX51_PIN_CSI2_D13, IOMUX_CONFIG_ALT3);
83 	gpio_direction_output(MX51EVK_LCD_5V, 1);
84 
85 	/* Turn on GPIO backlight */
86 	mxc_request_iomux(MX51_PIN_DI1_D1_CS, IOMUX_CONFIG_ALT4);
87 	mxc_iomux_set_input(MX51_GPIO3_IPP_IND_G_IN_4_SELECT_INPUT,
88 							INPUT_CTL_PATH1);
89 	gpio_direction_output(MX51EVK_LCD_BACKLIGHT, 1);
90 }
91 
92 int board_video_skip(void)
93 {
94 	int ret;
95 	char const *e = getenv("panel");
96 
97 	if (e) {
98 		if (strcmp(e, "claa") == 0) {
99 			ret = ipuv3_fb_init(&claa_wvga, 1, IPU_PIX_FMT_RGB565);
100 			if (ret)
101 				printf("claa cannot be configured: %d\n", ret);
102 			return ret;
103 		}
104 	}
105 
106 	/*
107 	 * 'panel' env variable not found or has different value than 'claa'
108 	 *  Defaulting to dvi output.
109 	 */
110 	ret = ipuv3_fb_init(&dvi, 0, IPU_PIX_FMT_RGB24);
111 	if (ret)
112 		printf("dvi cannot be configured: %d\n", ret);
113 	return ret;
114 }
115