projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 9e124435 KE |
1 | /* |
| 2 | * | |
| 3 | * LCD driver for HP Jornada 700 series (710/720/728) | |
| 4 | * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License version | |
| 8 | * 2 or any later version as published by the Free Software Foundation. | |
| 9 | * | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/device.h> | |
| 13 | #include <linux/fb.h> | |
| 14 | #include <linux/kernel.h> | |
| 15 | #include <linux/lcd.h> | |
| 16 | #include <linux/module.h> | |
| 17 | #include <linux/platform_device.h> | |
| 18 | #include <linux/delay.h> | |
| 19 | ||
| 20 | #include <mach/jornada720.h> | |
| 21 | #include <mach/hardware.h> | |
| 22 | ||
| 23 | #include <video/s1d13xxxfb.h> | |
| 24 | ||
| 25 | #define LCD_MAX_CONTRAST 0xff | |
| 26 | #define LCD_DEF_CONTRAST 0x80 | |
| 27 | ||
| 28 | static int jornada_lcd_get_power(struct lcd_device *dev) | |
| 29 | { | |
| 30 | /* LDD2 in PPC = LCD POWER */ | |
| 31 | if (PPSR & PPC_LDD2) | |
| 32 | return FB_BLANK_UNBLANK; /* PW ON */ | |
| 33 | else | |
| 34 | return FB_BLANK_POWERDOWN; /* PW OFF */ | |
| 35 | } | |
| 36 | ||
| 37 | static int jornada_lcd_get_contrast(struct lcd_device *dev) | |
| 38 | { | |
| 39 | int ret; | |
| 40 | ||
| 41 | if (jornada_lcd_get_power(dev) != FB_BLANK_UNBLANK) | |
| 42 | return 0; | |
| 43 | ||
| 44 | jornada_ssp_start(); | |
| 45 | ||
| 46 | if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) { | |
| 47 | printk(KERN_ERR "lcd: get contrast failed\n"); | |
| 48 | jornada_ssp_end(); | |
| 49 | return -ETIMEDOUT; | |
| 50 | } else { | |
| 51 | ret = jornada_ssp_byte(TXDUMMY); | |
| 52 | jornada_ssp_end(); | |
| 53 | return ret; | |
| 54 | } | |
| 55 | } | |
| 56 | ||
| 57 | static int jornada_lcd_set_contrast(struct lcd_device *dev, int value) | |
| 58 | { | |
| 59 | int ret; | |
| 60 | ||
| 61 | jornada_ssp_start(); | |
| 62 | ||
| 63 | /* start by sending our set contrast cmd to mcu */ | |
| 64 | ret = jornada_ssp_byte(SETCONTRAST); | |
| 65 | ||
| 66 | /* push the new value */ | |
| 67 | if (jornada_ssp_byte(value) != TXDUMMY) { | |
| 68 | printk(KERN_ERR "lcd : set contrast failed\n"); | |
| 69 | jornada_ssp_end(); | |
| 70 | return -ETIMEDOUT; | |
| 71 | } | |
| 72 | ||
| 73 | /* if we get here we can assume everything went well */ | |
| 74 | jornada_ssp_end(); | |
| 75 | ||
| 76 | return 0; | |
| 77 | } | |
| 78 | ||
| 79 | static int jornada_lcd_set_power(struct lcd_device *dev, int power) | |
| 80 | { | |
| 81 | if (power != FB_BLANK_UNBLANK) { | |
| 82 | PPSR &= ~PPC_LDD2; | |
| 83 | PPDR |= PPC_LDD2; | |
| 84 | } else | |
| 85 | PPSR |= PPC_LDD2; | |
| 86 | ||
| 87 | return 0; | |
| 88 | } | |
| 89 | ||
| 90 | static struct lcd_ops jornada_lcd_props = { | |
| 91 | .get_contrast = jornada_lcd_get_contrast, | |
| 92 | .set_contrast = jornada_lcd_set_contrast, | |
| 93 | .get_power = jornada_lcd_get_power, | |
| 94 | .set_power = jornada_lcd_set_power, | |
| 95 | }; | |
| 96 | ||
| 97 | static int jornada_lcd_probe(struct platform_device *pdev) | |
| 98 | { | |
| 99 | struct lcd_device *lcd_device; | |
| 100 | int ret; | |
| 101 | ||
| 102 | lcd_device = lcd_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_lcd_props); | |
| 103 | ||
| 104 | if (IS_ERR(lcd_device)) { | |
| 105 | ret = PTR_ERR(lcd_device); | |
| 106 | printk(KERN_ERR "lcd : failed to register device\n"); | |
| 107 | return ret; | |
| 108 | } | |
| 109 | ||
| 110 | platform_set_drvdata(pdev, lcd_device); | |
| 111 | ||
| 112 | /* lets set our default values */ | |
| 113 | jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST); | |
| 114 | jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); | |
| 115 | /* give it some time to startup */ | |
| 116 | msleep(100); | |
| 117 | ||
| 118 | return 0; | |
| 119 | } | |
| 120 | ||
| 121 | static int jornada_lcd_remove(struct platform_device *pdev) | |
| 122 | { | |
| 123 | struct lcd_device *lcd_device = platform_get_drvdata(pdev); | |
| 124 | ||
| 125 | lcd_device_unregister(lcd_device); | |
| 126 | ||
| 127 | return 0; | |
| 128 | } | |
| 129 | ||
| 130 | static struct platform_driver jornada_lcd_driver = { | |
| 131 | .probe = jornada_lcd_probe, | |
| 132 | .remove = jornada_lcd_remove, | |
| 133 | .driver = { | |
| 134 | .name = "jornada_lcd", | |
| 135 | }, | |
| 136 | }; | |
| 137 | ||
| 138 | int __init jornada_lcd_init(void) | |
| 139 | { | |
| 140 | return platform_driver_register(&jornada_lcd_driver); | |
| 141 | } | |
| 142 | ||
| 143 | void __exit jornada_lcd_exit(void) | |
| 144 | { | |
| 145 | platform_driver_unregister(&jornada_lcd_driver); | |
| 146 | } | |
| 147 | ||
| 148 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); | |
| 149 | MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver"); | |
| 150 | MODULE_LICENSE("GPL"); | |
| 151 | ||
| 152 | module_init(jornada_lcd_init); | |
| 153 | module_exit(jornada_lcd_exit); |