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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> | |
18 | #include <plat/display.h> | |
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 | ||
24 | static void zoom_lcd_panel_init(void) | |
25 | { | |
26 | int ret; | |
27 | unsigned char lcd_panel_reset_gpio; | |
28 | ||
29 | lcd_panel_reset_gpio = (omap_rev() > OMAP3430_REV_ES3_0) ? | |
30 | LCD_PANEL_RESET_GPIO_PROD : | |
31 | LCD_PANEL_RESET_GPIO_PILOT; | |
32 | ||
33 | ret = gpio_request(lcd_panel_reset_gpio, "lcd reset"); | |
34 | if (ret) { | |
35 | pr_err("Failed to get LCD reset GPIO (gpio%d).\n", | |
36 | lcd_panel_reset_gpio); | |
37 | return; | |
38 | } | |
39 | gpio_direction_output(lcd_panel_reset_gpio, 1); | |
40 | ||
41 | ret = gpio_request(LCD_PANEL_QVGA_GPIO, "lcd qvga"); | |
42 | if (ret) { | |
43 | pr_err("Failed to get LCD_PANEL_QVGA_GPIO (gpio%d).\n", | |
44 | LCD_PANEL_QVGA_GPIO); | |
45 | goto err0; | |
46 | } | |
47 | gpio_direction_output(LCD_PANEL_QVGA_GPIO, 1); | |
48 | ||
49 | return; | |
50 | err0: | |
51 | gpio_free(lcd_panel_reset_gpio); | |
52 | } | |
53 | ||
54 | static int zoom_panel_enable_lcd(struct omap_dss_device *dssdev) | |
55 | { | |
56 | return 0; | |
57 | } | |
58 | ||
59 | static void zoom_panel_disable_lcd(struct omap_dss_device *dssdev) | |
60 | { | |
61 | } | |
62 | ||
63 | /* | |
64 | * PWMA/B register offsets (TWL4030_MODULE_PWMA) | |
65 | */ | |
66 | #define TWL_INTBR_PMBR1 0xD | |
67 | #define TWL_INTBR_GPBR1 0xC | |
68 | #define TWL_LED_PWMON 0x0 | |
69 | #define TWL_LED_PWMOFF 0x1 | |
70 | ||
71 | static int zoom_set_bl_intensity(struct omap_dss_device *dssdev, int level) | |
72 | { | |
73 | unsigned char c; | |
74 | u8 mux_pwm, enb_pwm; | |
75 | ||
76 | if (level > 100) | |
77 | return -1; | |
78 | ||
79 | twl_i2c_read_u8(TWL4030_MODULE_INTBR, &mux_pwm, TWL_INTBR_PMBR1); | |
80 | twl_i2c_read_u8(TWL4030_MODULE_INTBR, &enb_pwm, TWL_INTBR_GPBR1); | |
81 | ||
82 | if (level == 0) { | |
83 | /* disable pwm1 output and clock */ | |
84 | enb_pwm = enb_pwm & 0xF5; | |
85 | /* change pwm1 pin to gpio pin */ | |
86 | mux_pwm = mux_pwm & 0xCF; | |
87 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
88 | enb_pwm, TWL_INTBR_GPBR1); | |
89 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
90 | mux_pwm, TWL_INTBR_PMBR1); | |
91 | return 0; | |
92 | } | |
93 | ||
94 | if (!((enb_pwm & 0xA) && (mux_pwm & 0x30))) { | |
95 | /* change gpio pin to pwm1 pin */ | |
96 | mux_pwm = mux_pwm | 0x30; | |
97 | /* enable pwm1 output and clock*/ | |
98 | enb_pwm = enb_pwm | 0x0A; | |
99 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
100 | mux_pwm, TWL_INTBR_PMBR1); | |
101 | twl_i2c_write_u8(TWL4030_MODULE_INTBR, | |
102 | enb_pwm, TWL_INTBR_GPBR1); | |
103 | } | |
104 | ||
105 | c = ((50 * (100 - level)) / 100) + 1; | |
106 | twl_i2c_write_u8(TWL4030_MODULE_PWM1, 0x7F, TWL_LED_PWMOFF); | |
107 | twl_i2c_write_u8(TWL4030_MODULE_PWM1, c, TWL_LED_PWMON); | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static struct omap_dss_device zoom_lcd_device = { | |
113 | .name = "lcd", | |
114 | .driver_name = "NEC_8048_panel", | |
115 | .type = OMAP_DISPLAY_TYPE_DPI, | |
116 | .phy.dpi.data_lines = 24, | |
117 | .platform_enable = zoom_panel_enable_lcd, | |
118 | .platform_disable = zoom_panel_disable_lcd, | |
119 | .max_backlight_level = 100, | |
120 | .set_backlight = zoom_set_bl_intensity, | |
121 | }; | |
122 | ||
123 | static struct omap_dss_device *zoom_dss_devices[] = { | |
124 | &zoom_lcd_device, | |
125 | }; | |
126 | ||
127 | static struct omap_dss_board_info zoom_dss_data = { | |
128 | .num_devices = ARRAY_SIZE(zoom_dss_devices), | |
129 | .devices = zoom_dss_devices, | |
130 | .default_device = &zoom_lcd_device, | |
131 | }; | |
132 | ||
133 | static struct platform_device zoom_dss_device = { | |
134 | .name = "omapdss", | |
135 | .id = -1, | |
136 | .dev = { | |
137 | .platform_data = &zoom_dss_data, | |
138 | }, | |
139 | }; | |
140 | ||
141 | static struct omap2_mcspi_device_config dss_lcd_mcspi_config = { | |
142 | .turbo_mode = 1, | |
143 | .single_channel = 1, /* 0: slave, 1: master */ | |
144 | }; | |
145 | ||
146 | static struct spi_board_info nec_8048_spi_board_info[] __initdata = { | |
147 | [0] = { | |
148 | .modalias = "nec_8048_spi", | |
149 | .bus_num = 1, | |
150 | .chip_select = 2, | |
151 | .max_speed_hz = 375000, | |
152 | .controller_data = &dss_lcd_mcspi_config, | |
153 | }, | |
154 | }; | |
155 | ||
156 | static struct platform_device *zoom_display_devices[] __initdata = { | |
157 | &zoom_dss_device, | |
158 | }; | |
159 | ||
160 | void __init zoom_display_init(void) | |
161 | { | |
162 | platform_add_devices(zoom_display_devices, | |
163 | ARRAY_SIZE(zoom_display_devices)); | |
164 | spi_register_board_info(nec_8048_spi_board_info, | |
165 | ARRAY_SIZE(nec_8048_spi_board_info)); | |
166 | zoom_lcd_panel_init(); | |
167 | } | |
168 |