Thomas Gleixner | 7de31d0 | 2019-05-20 09:19:14 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 2 | /* |
| 3 | * |
| 4 | * LCD driver for HP Jornada 700 series (710/720/728) |
| 5 | * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com> |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <linux/device.h> |
| 9 | #include <linux/fb.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/lcd.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/delay.h> |
| 15 | |
| 16 | #include <mach/jornada720.h> |
| 17 | #include <mach/hardware.h> |
| 18 | |
| 19 | #include <video/s1d13xxxfb.h> |
| 20 | |
| 21 | #define LCD_MAX_CONTRAST 0xff |
| 22 | #define LCD_DEF_CONTRAST 0x80 |
| 23 | |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 24 | static int jornada_lcd_get_power(struct lcd_device *ld) |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 25 | { |
Jingoo Han | 3e51cd9 | 2014-08-27 10:14:43 +0900 | [diff] [blame] | 26 | return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 27 | } |
| 28 | |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 29 | static int jornada_lcd_get_contrast(struct lcd_device *ld) |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 30 | { |
| 31 | int ret; |
| 32 | |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 33 | if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK) |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 34 | return 0; |
| 35 | |
| 36 | jornada_ssp_start(); |
| 37 | |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 38 | if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) { |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 39 | ret = jornada_ssp_byte(TXDUMMY); |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 40 | goto success; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 41 | } |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 42 | |
| 43 | dev_err(&ld->dev, "failed to set contrast\n"); |
| 44 | ret = -ETIMEDOUT; |
| 45 | |
| 46 | success: |
| 47 | jornada_ssp_end(); |
| 48 | return ret; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 49 | } |
| 50 | |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 51 | static int jornada_lcd_set_contrast(struct lcd_device *ld, int value) |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 52 | { |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 53 | int ret = 0; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 54 | |
| 55 | jornada_ssp_start(); |
| 56 | |
| 57 | /* start by sending our set contrast cmd to mcu */ |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 58 | if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) { |
| 59 | /* if successful push the new value */ |
| 60 | if (jornada_ssp_byte(value) == TXDUMMY) |
| 61 | goto success; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 62 | } |
| 63 | |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 64 | dev_err(&ld->dev, "failed to set contrast\n"); |
| 65 | ret = -ETIMEDOUT; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 66 | |
Lee Jones | 1e3b097 | 2014-07-10 09:07:06 +0100 | [diff] [blame] | 67 | success: |
| 68 | jornada_ssp_end(); |
| 69 | return ret; |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 70 | } |
| 71 | |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 72 | static int jornada_lcd_set_power(struct lcd_device *ld, int power) |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 73 | { |
| 74 | if (power != FB_BLANK_UNBLANK) { |
| 75 | PPSR &= ~PPC_LDD2; |
| 76 | PPDR |= PPC_LDD2; |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 77 | } else { |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 78 | PPSR |= PPC_LDD2; |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 79 | } |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static struct lcd_ops jornada_lcd_props = { |
| 85 | .get_contrast = jornada_lcd_get_contrast, |
| 86 | .set_contrast = jornada_lcd_set_contrast, |
| 87 | .get_power = jornada_lcd_get_power, |
| 88 | .set_power = jornada_lcd_set_power, |
| 89 | }; |
| 90 | |
| 91 | static int jornada_lcd_probe(struct platform_device *pdev) |
| 92 | { |
| 93 | struct lcd_device *lcd_device; |
| 94 | int ret; |
| 95 | |
Jingoo Han | 964598f | 2014-01-23 15:54:29 -0800 | [diff] [blame] | 96 | lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME, |
| 97 | &pdev->dev, NULL, &jornada_lcd_props); |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 98 | |
| 99 | if (IS_ERR(lcd_device)) { |
| 100 | ret = PTR_ERR(lcd_device); |
Jingoo Han | b2dcd7b | 2013-04-29 16:17:31 -0700 | [diff] [blame] | 101 | dev_err(&pdev->dev, "failed to register device\n"); |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | platform_set_drvdata(pdev, lcd_device); |
| 106 | |
| 107 | /* lets set our default values */ |
| 108 | jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST); |
| 109 | jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); |
| 110 | /* give it some time to startup */ |
| 111 | msleep(100); |
| 112 | |
| 113 | return 0; |
| 114 | } |
| 115 | |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 116 | static struct platform_driver jornada_lcd_driver = { |
| 117 | .probe = jornada_lcd_probe, |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 118 | .driver = { |
| 119 | .name = "jornada_lcd", |
| 120 | }, |
| 121 | }; |
| 122 | |
Axel Lin | 81178e0 | 2012-01-10 15:09:11 -0800 | [diff] [blame] | 123 | module_platform_driver(jornada_lcd_driver); |
Kristoffer Ericson | 9e12443 | 2009-02-18 11:47:26 +0000 | [diff] [blame] | 124 | |
| 125 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>"); |
| 126 | MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver"); |
| 127 | MODULE_LICENSE("GPL"); |