projects / deliverable / linux.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 | ||
| 20c225cb JH |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 13 | ||
| 9e124435 KE |
14 | #include <linux/device.h> |
| 15 | #include <linux/fb.h> | |
| 16 | #include <linux/kernel.h> | |
| 17 | #include <linux/lcd.h> | |
| 18 | #include <linux/module.h> | |
| 19 | #include <linux/platform_device.h> | |
| 20 | #include <linux/delay.h> | |
| 21 | ||
| 22 | #include <mach/jornada720.h> | |
| 23 | #include <mach/hardware.h> | |
| 24 | ||
| 25 | #include <video/s1d13xxxfb.h> | |
| 26 | ||
| 27 | #define LCD_MAX_CONTRAST 0xff | |
| 28 | #define LCD_DEF_CONTRAST 0x80 | |
| 29 | ||
| 30 | static int jornada_lcd_get_power(struct lcd_device *dev) | |
| 31 | { | |
| 32 | /* LDD2 in PPC = LCD POWER */ | |
| 33 | if (PPSR & PPC_LDD2) | |
| 34 | return FB_BLANK_UNBLANK; /* PW ON */ | |
| 35 | else | |
| 36 | return FB_BLANK_POWERDOWN; /* PW OFF */ | |
| 37 | } | |
| 38 | ||
| 39 | static int jornada_lcd_get_contrast(struct lcd_device *dev) | |
| 40 | { | |
| 41 | int ret; | |
| 42 | ||
| 43 | if (jornada_lcd_get_power(dev) != FB_BLANK_UNBLANK) | |
| 44 | return 0; | |
| 45 | ||
| 46 | jornada_ssp_start(); | |
| 47 | ||
| 48 | if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) { | |
| 20c225cb | 49 | pr_err("get contrast failed\n"); |
| 9e124435 KE |
50 | jornada_ssp_end(); |
| 51 | return -ETIMEDOUT; | |
| 52 | } else { | |
| 53 | ret = jornada_ssp_byte(TXDUMMY); | |
| 54 | jornada_ssp_end(); | |
| 55 | return ret; | |
| 56 | } | |
| 57 | } | |
| 58 | ||
| 59 | static int jornada_lcd_set_contrast(struct lcd_device *dev, int value) | |
| 60 | { | |
| 61 | int ret; | |
| 62 | ||
| 63 | jornada_ssp_start(); | |
| 64 | ||
| 65 | /* start by sending our set contrast cmd to mcu */ | |
| 66 | ret = jornada_ssp_byte(SETCONTRAST); | |
| 67 | ||
| 68 | /* push the new value */ | |
| 69 | if (jornada_ssp_byte(value) != TXDUMMY) { | |
| 20c225cb | 70 | pr_err("set contrast failed\n"); |
| 9e124435 KE |
71 | jornada_ssp_end(); |
| 72 | return -ETIMEDOUT; | |
| 73 | } | |
| 74 | ||
| 75 | /* if we get here we can assume everything went well */ | |
| 76 | jornada_ssp_end(); | |
| 77 | ||
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | static int jornada_lcd_set_power(struct lcd_device *dev, int power) | |
| 82 | { | |
| 83 | if (power != FB_BLANK_UNBLANK) { | |
| 84 | PPSR &= ~PPC_LDD2; | |
| 85 | PPDR |= PPC_LDD2; | |
| 86 | } else | |
| 87 | PPSR |= PPC_LDD2; | |
| 88 | ||
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | static struct lcd_ops jornada_lcd_props = { | |
| 93 | .get_contrast = jornada_lcd_get_contrast, | |
| 94 | .set_contrast = jornada_lcd_set_contrast, | |
| 95 | .get_power = jornada_lcd_get_power, | |
| 96 | .set_power = jornada_lcd_set_power, | |
| 97 | }; | |
| 98 | ||
| 99 | static int jornada_lcd_probe(struct platform_device *pdev) | |
| 100 | { | |
| 101 | struct lcd_device *lcd_device; | |
| 102 | int ret; | |
| 103 | ||
| 104 | lcd_device = lcd_device_register(S1D_DEVICENAME, &pdev->dev, NULL, &jornada_lcd_props); | |
| 105 | ||
| 106 | if (IS_ERR(lcd_device)) { | |
| 107 | ret = PTR_ERR(lcd_device); | |
| 20c225cb | 108 | pr_err("failed to register device\n"); |
| 9e124435 KE |
109 | return ret; |
| 110 | } | |
| 111 | ||
| 112 | platform_set_drvdata(pdev, lcd_device); | |
| 113 | ||
| 114 | /* lets set our default values */ | |
| 115 | jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST); | |
| 116 | jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); | |
| 117 | /* give it some time to startup */ | |
| 118 | msleep(100); | |
| 119 | ||
| 120 | return 0; | |
| 121 | } | |
| 122 | ||
| 123 | static int jornada_lcd_remove(struct platform_device *pdev) | |
| 124 | { | |
| 125 | struct lcd_device *lcd_device = platform_get_drvdata(pdev); | |
| 126 | ||
| 127 | lcd_device_unregister(lcd_device); | |
| 128 | ||
| 129 | return 0; | |
| 130 | } | |
| 131 | ||
| 132 | static struct platform_driver jornada_lcd_driver = { | |
| 133 | .probe = jornada_lcd_probe, | |
| 134 | .remove = jornada_lcd_remove, | |
| 135 | .driver = { | |
| 136 | .name = "jornada_lcd", | |
| 137 | }, | |
| 138 | }; | |
| 139 | ||
| 81178e02 | 140 | module_platform_driver(jornada_lcd_driver); |
| 9e124435 KE |
141 | |
| 142 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); | |
| 143 | MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver"); | |
| 144 | MODULE_LICENSE("GPL"); |