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127 lines
2.7 KiB
127 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* |
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* LCD driver for HP Jornada 700 series (710/720/728) |
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* Copyright (C) 2006-2009 Kristoffer Ericson <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/fb.h> |
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#include <linux/kernel.h> |
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#include <linux/lcd.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/delay.h> |
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#include <mach/jornada720.h> |
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#include <mach/hardware.h> |
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#include <video/s1d13xxxfb.h> |
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#define LCD_MAX_CONTRAST 0xff |
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#define LCD_DEF_CONTRAST 0x80 |
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static int jornada_lcd_get_power(struct lcd_device *ld) |
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{ |
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return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; |
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} |
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static int jornada_lcd_get_contrast(struct lcd_device *ld) |
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{ |
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int ret; |
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if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK) |
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return 0; |
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jornada_ssp_start(); |
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if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) { |
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ret = jornada_ssp_byte(TXDUMMY); |
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goto success; |
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} |
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dev_err(&ld->dev, "failed to set contrast\n"); |
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ret = -ETIMEDOUT; |
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success: |
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jornada_ssp_end(); |
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return ret; |
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} |
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static int jornada_lcd_set_contrast(struct lcd_device *ld, int value) |
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{ |
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int ret = 0; |
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jornada_ssp_start(); |
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/* start by sending our set contrast cmd to mcu */ |
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if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) { |
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/* if successful push the new value */ |
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if (jornada_ssp_byte(value) == TXDUMMY) |
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goto success; |
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} |
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dev_err(&ld->dev, "failed to set contrast\n"); |
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ret = -ETIMEDOUT; |
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success: |
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jornada_ssp_end(); |
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return ret; |
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} |
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static int jornada_lcd_set_power(struct lcd_device *ld, int power) |
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{ |
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if (power != FB_BLANK_UNBLANK) { |
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PPSR &= ~PPC_LDD2; |
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PPDR |= PPC_LDD2; |
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} else { |
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PPSR |= PPC_LDD2; |
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} |
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return 0; |
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} |
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static struct lcd_ops jornada_lcd_props = { |
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.get_contrast = jornada_lcd_get_contrast, |
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.set_contrast = jornada_lcd_set_contrast, |
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.get_power = jornada_lcd_get_power, |
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.set_power = jornada_lcd_set_power, |
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}; |
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static int jornada_lcd_probe(struct platform_device *pdev) |
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{ |
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struct lcd_device *lcd_device; |
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int ret; |
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lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME, |
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&pdev->dev, NULL, &jornada_lcd_props); |
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if (IS_ERR(lcd_device)) { |
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ret = PTR_ERR(lcd_device); |
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dev_err(&pdev->dev, "failed to register device\n"); |
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return ret; |
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} |
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platform_set_drvdata(pdev, lcd_device); |
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/* lets set our default values */ |
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jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST); |
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jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK); |
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/* give it some time to startup */ |
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msleep(100); |
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return 0; |
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} |
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static struct platform_driver jornada_lcd_driver = { |
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.probe = jornada_lcd_probe, |
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.driver = { |
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.name = "jornada_lcd", |
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}, |
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}; |
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module_platform_driver(jornada_lcd_driver); |
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MODULE_AUTHOR("Kristoffer Ericson <[email protected]>"); |
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MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver"); |
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MODULE_LICENSE("GPL");
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