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a6490335 K |
1 | /* |
2 | * Copyright (C) 2010 Texas Instruments Inc. | |
3 | * | |
4 | * Modified from mach-omap2/board-zoom-peripherals.c | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/gpio.h> | |
15 | #include <linux/i2c/twl.h> | |
16 | #include <linux/spi/spi.h> | |
17 | #include <plat/mcspi.h> | |
a0b38cc4 | 18 | #include <video/omapdss.h> |
a6490335 K |
19 | |
20 | #define LCD_PANEL_RESET_GPIO_PROD 96 | |
21 | #define LCD_PANEL_RESET_GPIO_PILOT 55 | |
22 | #define LCD_PANEL_QVGA_GPIO 56 | |
23 | ||
bc593f5d IG |
24 | static struct gpio zoom_lcd_gpios[] __initdata = { |
25 | { -EINVAL, GPIOF_OUT_INIT_HIGH, "lcd reset" }, | |
26 | { LCD_PANEL_QVGA_GPIO, GPIOF_OUT_INIT_HIGH, "lcd qvga" }, | |
27 | }; | |
28 | ||
a6490335 K |
29 | static void zoom_lcd_panel_init(void) |
30 | { | |
bc593f5d | 31 | zoom_lcd_gpios[0].gpio = (omap_rev() > OMAP3430_REV_ES3_0) ? |
a6490335 K |
32 | LCD_PANEL_RESET_GPIO_PROD : |
33 | LCD_PANEL_RESET_GPIO_PILOT; | |
34 | ||
bc593f5d IG |
35 | if (gpio_request_array(zoom_lcd_gpios, ARRAY_SIZE(zoom_lcd_gpios))) |
36 | pr_err("%s: Failed to get LCD GPIOs.\n", __func__); | |
a6490335 K |
37 | } |
38 | ||
39 | static int zoom_panel_enable_lcd(struct omap_dss_device *dssdev) | |
40 | { | |
41 | return 0; | |
42 | } | |
43 | ||
44 | static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev) | |
45 | { | |
46 | } | |
47 | ||
48 | /* | |
49 | * PWMA/B register offsets (TWL4030_MODULE_PWMA) | |
50 | */ | |
51 | #define TWL_INTBR_PMBR1 0xD | |
52 | #define TWL_INTBR_GPBR1 0xC | |
53 | #define TWL_LED_PWMON 0x0 | |
54 | #define TWL_LED_PWMOFF 0x1 | |
55 | ||
56 | static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level) | |
57 | { | |
58 | unsigned char c; | |
59 | u8 mux_pwm, enb_pwm; | |
60 | ||
61 | if (level > 100) | |
62 | return -1; | |
63 | ||
64 | twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1); | |
65 | twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1); | |
66 | ||
67 | if (level == 0) { | |
68 | /* disable pwm1 output and clock */ | |
69 | enb_pwm = enb_pwm & 0xF5; | |
70 | /* change pwm1 pin to gpio pin */ | |
71 | mux_pwm = mux_pwm & 0xCF; | |
72 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
73 | enb_pwm, TWL_INTBR_GPBR1); | |
74 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
75 | mux_pwm, TWL_INTBR_PMBR1); | |
76 | return 0; | |
77 | } | |
78 | ||
79 | if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) { | |
80 | /* change gpio pin to pwm1 pin */ | |
81 | mux_pwm = mux_pwm | 0x30; | |
82 | /* enable pwm1 output and clock*/ | |
83 | enb_pwm = enb_pwm | 0x0A; | |
84 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
85 | mux_pwm, TWL_INTBR_PMBR1); | |
86 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
87 | enb_pwm, TWL_INTBR_GPBR1); | |
88 | } | |
89 | ||
90 | c = ((50 * (100 - level)) / 100) + 1; | |
91 | twl_i2c_write_u8(TWL4030_MODULE_PWM1, 0x7F, TWL_LED_PWMOFF); | |
92 | twl_i2c_write_u8(TWL4030_MODULE_PWM1, c, TWL_LED_PWMON); | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static struct omap_dss_device zoom_lcd_device = { | |
98 | .name = "lcd", | |
99 | .driver_name = "NEC_8048_panel", | |
100 | .type = OMAP_DISPLAY_TYPE_DPI, | |
101 | .phy.dpi.data_lines = 24, | |
102 | .platform_enable = zoom_panel_enable_lcd, | |
103 | .platform_disable = zoom_panel_disable_lcd, | |
104 | .max_backlight_level = 100, | |
105 | .set_backlight = zoom_set_bl_intensity, | |
106 | }; | |
107 | ||
108 | static struct omap_dss_device *zoom_dss_devices[] = { | |
109 | &zoom_lcd_device, | |
110 | }; | |
111 | ||
112 | static struct omap_dss_board_info zoom_dss_data = { | |
113 | .num_devices = ARRAY_SIZE(zoom_dss_devices), | |
114 | .devices = zoom_dss_devices, | |
115 | .default_device = &zoom_lcd_device, | |
116 | }; | |
117 | ||
a6490335 K |
118 | static struct omap2_mcspi_device_config dss_lcd_mcspi_config = { |
119 | .turbo_mode = 1, | |
120 | .single_channel = 1, /* 0: slave, 1: master */ | |
121 | }; | |
122 | ||
123 | static struct spi_board_info nec_8048_spi_board_info[] __initdata = { | |
124 | [0] = { | |
125 | .modalias = "nec_8048_spi", | |
126 | .bus_num = 1, | |
127 | .chip_select = 2, | |
128 | .max_speed_hz = 375000, | |
129 | .controller_data = &dss_lcd_mcspi_config, | |
130 | }, | |
131 | }; | |
132 | ||
a6490335 K |
133 | void __init zoom_display_init(void) |
134 | { | |
d5e13227 | 135 | omap_display_init(&zoom_dss_data); |
a6490335 K |
136 | spi_register_board_info(nec_8048_spi_board_info, |
137 | ARRAY_SIZE(nec_8048_spi_board_info)); | |
138 | zoom_lcd_panel_init(); | |
139 | } | |
140 |