17de31d0dSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
29e124435SKristoffer Ericson /*
39e124435SKristoffer Ericson *
49e124435SKristoffer Ericson * LCD driver for HP Jornada 700 series (710/720/728)
59e124435SKristoffer Ericson * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
69e124435SKristoffer Ericson */
79e124435SKristoffer Ericson
89e124435SKristoffer Ericson #include <linux/device.h>
99e124435SKristoffer Ericson #include <linux/fb.h>
109e124435SKristoffer Ericson #include <linux/kernel.h>
119e124435SKristoffer Ericson #include <linux/lcd.h>
129e124435SKristoffer Ericson #include <linux/module.h>
139e124435SKristoffer Ericson #include <linux/platform_device.h>
149e124435SKristoffer Ericson #include <linux/delay.h>
159e124435SKristoffer Ericson
169e124435SKristoffer Ericson #include <mach/jornada720.h>
179e124435SKristoffer Ericson #include <mach/hardware.h>
189e124435SKristoffer Ericson
199e124435SKristoffer Ericson #include <video/s1d13xxxfb.h>
209e124435SKristoffer Ericson
219e124435SKristoffer Ericson #define LCD_MAX_CONTRAST 0xff
229e124435SKristoffer Ericson #define LCD_DEF_CONTRAST 0x80
239e124435SKristoffer Ericson
jornada_lcd_get_power(struct lcd_device * ld)24b2dcd7beSJingoo Han static int jornada_lcd_get_power(struct lcd_device *ld)
259e124435SKristoffer Ericson {
263e51cd93SJingoo Han return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
279e124435SKristoffer Ericson }
289e124435SKristoffer Ericson
jornada_lcd_get_contrast(struct lcd_device * ld)29b2dcd7beSJingoo Han static int jornada_lcd_get_contrast(struct lcd_device *ld)
309e124435SKristoffer Ericson {
319e124435SKristoffer Ericson int ret;
329e124435SKristoffer Ericson
33b2dcd7beSJingoo Han if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
349e124435SKristoffer Ericson return 0;
359e124435SKristoffer Ericson
369e124435SKristoffer Ericson jornada_ssp_start();
379e124435SKristoffer Ericson
381e3b0970SLee Jones if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) {
399e124435SKristoffer Ericson ret = jornada_ssp_byte(TXDUMMY);
401e3b0970SLee Jones goto success;
411e3b0970SLee Jones }
421e3b0970SLee Jones
431e3b0970SLee Jones dev_err(&ld->dev, "failed to set contrast\n");
441e3b0970SLee Jones ret = -ETIMEDOUT;
451e3b0970SLee Jones
461e3b0970SLee Jones success:
479e124435SKristoffer Ericson jornada_ssp_end();
489e124435SKristoffer Ericson return ret;
499e124435SKristoffer Ericson }
509e124435SKristoffer Ericson
jornada_lcd_set_contrast(struct lcd_device * ld,int value)51b2dcd7beSJingoo Han static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
529e124435SKristoffer Ericson {
531e3b0970SLee Jones int ret = 0;
549e124435SKristoffer Ericson
559e124435SKristoffer Ericson jornada_ssp_start();
569e124435SKristoffer Ericson
579e124435SKristoffer Ericson /* start by sending our set contrast cmd to mcu */
581e3b0970SLee Jones if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) {
591e3b0970SLee Jones /* if successful push the new value */
601e3b0970SLee Jones if (jornada_ssp_byte(value) == TXDUMMY)
611e3b0970SLee Jones goto success;
629e124435SKristoffer Ericson }
639e124435SKristoffer Ericson
641e3b0970SLee Jones dev_err(&ld->dev, "failed to set contrast\n");
651e3b0970SLee Jones ret = -ETIMEDOUT;
669e124435SKristoffer Ericson
671e3b0970SLee Jones success:
681e3b0970SLee Jones jornada_ssp_end();
691e3b0970SLee Jones return ret;
709e124435SKristoffer Ericson }
719e124435SKristoffer Ericson
jornada_lcd_set_power(struct lcd_device * ld,int power)72b2dcd7beSJingoo Han static int jornada_lcd_set_power(struct lcd_device *ld, int power)
739e124435SKristoffer Ericson {
749e124435SKristoffer Ericson if (power != FB_BLANK_UNBLANK) {
759e124435SKristoffer Ericson PPSR &= ~PPC_LDD2;
769e124435SKristoffer Ericson PPDR |= PPC_LDD2;
77b2dcd7beSJingoo Han } else {
789e124435SKristoffer Ericson PPSR |= PPC_LDD2;
79b2dcd7beSJingoo Han }
809e124435SKristoffer Ericson
819e124435SKristoffer Ericson return 0;
829e124435SKristoffer Ericson }
839e124435SKristoffer Ericson
849e124435SKristoffer Ericson static struct lcd_ops jornada_lcd_props = {
859e124435SKristoffer Ericson .get_contrast = jornada_lcd_get_contrast,
869e124435SKristoffer Ericson .set_contrast = jornada_lcd_set_contrast,
879e124435SKristoffer Ericson .get_power = jornada_lcd_get_power,
889e124435SKristoffer Ericson .set_power = jornada_lcd_set_power,
899e124435SKristoffer Ericson };
909e124435SKristoffer Ericson
jornada_lcd_probe(struct platform_device * pdev)919e124435SKristoffer Ericson static int jornada_lcd_probe(struct platform_device *pdev)
929e124435SKristoffer Ericson {
939e124435SKristoffer Ericson struct lcd_device *lcd_device;
949e124435SKristoffer Ericson int ret;
959e124435SKristoffer Ericson
96964598f2SJingoo Han lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME,
97964598f2SJingoo Han &pdev->dev, NULL, &jornada_lcd_props);
989e124435SKristoffer Ericson
999e124435SKristoffer Ericson if (IS_ERR(lcd_device)) {
1009e124435SKristoffer Ericson ret = PTR_ERR(lcd_device);
101b2dcd7beSJingoo Han dev_err(&pdev->dev, "failed to register device\n");
1029e124435SKristoffer Ericson return ret;
1039e124435SKristoffer Ericson }
1049e124435SKristoffer Ericson
1059e124435SKristoffer Ericson platform_set_drvdata(pdev, lcd_device);
1069e124435SKristoffer Ericson
1079e124435SKristoffer Ericson /* lets set our default values */
1089e124435SKristoffer Ericson jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
1099e124435SKristoffer Ericson jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
1109e124435SKristoffer Ericson /* give it some time to startup */
1119e124435SKristoffer Ericson msleep(100);
1129e124435SKristoffer Ericson
1139e124435SKristoffer Ericson return 0;
1149e124435SKristoffer Ericson }
1159e124435SKristoffer Ericson
1169e124435SKristoffer Ericson static struct platform_driver jornada_lcd_driver = {
1179e124435SKristoffer Ericson .probe = jornada_lcd_probe,
1189e124435SKristoffer Ericson .driver = {
1199e124435SKristoffer Ericson .name = "jornada_lcd",
1209e124435SKristoffer Ericson },
1219e124435SKristoffer Ericson };
1229e124435SKristoffer Ericson
12381178e02SAxel Lin module_platform_driver(jornada_lcd_driver);
1249e124435SKristoffer Ericson
1259e124435SKristoffer Ericson MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
1269e124435SKristoffer Ericson MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
1279e124435SKristoffer Ericson MODULE_LICENSE("GPL");
128