1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * LCD driver for HP Jornada 700 series (710/720/728)
5*4882a593Smuzhiyun * Copyright (C) 2006-2009 Kristoffer Ericson <kristoffer.ericson@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/device.h>
9*4882a593Smuzhiyun #include <linux/fb.h>
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/lcd.h>
12*4882a593Smuzhiyun #include <linux/module.h>
13*4882a593Smuzhiyun #include <linux/platform_device.h>
14*4882a593Smuzhiyun #include <linux/delay.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <mach/jornada720.h>
17*4882a593Smuzhiyun #include <mach/hardware.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <video/s1d13xxxfb.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun #define LCD_MAX_CONTRAST 0xff
22*4882a593Smuzhiyun #define LCD_DEF_CONTRAST 0x80
23*4882a593Smuzhiyun
jornada_lcd_get_power(struct lcd_device * ld)24*4882a593Smuzhiyun static int jornada_lcd_get_power(struct lcd_device *ld)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun return PPSR & PPC_LDD2 ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
jornada_lcd_get_contrast(struct lcd_device * ld)29*4882a593Smuzhiyun static int jornada_lcd_get_contrast(struct lcd_device *ld)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun int ret;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
34*4882a593Smuzhiyun return 0;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun jornada_ssp_start();
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (jornada_ssp_byte(GETCONTRAST) == TXDUMMY) {
39*4882a593Smuzhiyun ret = jornada_ssp_byte(TXDUMMY);
40*4882a593Smuzhiyun goto success;
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun dev_err(&ld->dev, "failed to set contrast\n");
44*4882a593Smuzhiyun ret = -ETIMEDOUT;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun success:
47*4882a593Smuzhiyun jornada_ssp_end();
48*4882a593Smuzhiyun return ret;
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
jornada_lcd_set_contrast(struct lcd_device * ld,int value)51*4882a593Smuzhiyun static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun int ret = 0;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun jornada_ssp_start();
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /* start by sending our set contrast cmd to mcu */
58*4882a593Smuzhiyun if (jornada_ssp_byte(SETCONTRAST) == TXDUMMY) {
59*4882a593Smuzhiyun /* if successful push the new value */
60*4882a593Smuzhiyun if (jornada_ssp_byte(value) == TXDUMMY)
61*4882a593Smuzhiyun goto success;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun dev_err(&ld->dev, "failed to set contrast\n");
65*4882a593Smuzhiyun ret = -ETIMEDOUT;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun success:
68*4882a593Smuzhiyun jornada_ssp_end();
69*4882a593Smuzhiyun return ret;
70*4882a593Smuzhiyun }
71*4882a593Smuzhiyun
jornada_lcd_set_power(struct lcd_device * ld,int power)72*4882a593Smuzhiyun static int jornada_lcd_set_power(struct lcd_device *ld, int power)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun if (power != FB_BLANK_UNBLANK) {
75*4882a593Smuzhiyun PPSR &= ~PPC_LDD2;
76*4882a593Smuzhiyun PPDR |= PPC_LDD2;
77*4882a593Smuzhiyun } else {
78*4882a593Smuzhiyun PPSR |= PPC_LDD2;
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun return 0;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun static struct lcd_ops jornada_lcd_props = {
85*4882a593Smuzhiyun .get_contrast = jornada_lcd_get_contrast,
86*4882a593Smuzhiyun .set_contrast = jornada_lcd_set_contrast,
87*4882a593Smuzhiyun .get_power = jornada_lcd_get_power,
88*4882a593Smuzhiyun .set_power = jornada_lcd_set_power,
89*4882a593Smuzhiyun };
90*4882a593Smuzhiyun
jornada_lcd_probe(struct platform_device * pdev)91*4882a593Smuzhiyun static int jornada_lcd_probe(struct platform_device *pdev)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun struct lcd_device *lcd_device;
94*4882a593Smuzhiyun int ret;
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun lcd_device = devm_lcd_device_register(&pdev->dev, S1D_DEVICENAME,
97*4882a593Smuzhiyun &pdev->dev, NULL, &jornada_lcd_props);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun if (IS_ERR(lcd_device)) {
100*4882a593Smuzhiyun ret = PTR_ERR(lcd_device);
101*4882a593Smuzhiyun dev_err(&pdev->dev, "failed to register device\n");
102*4882a593Smuzhiyun return ret;
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun platform_set_drvdata(pdev, lcd_device);
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun /* lets set our default values */
108*4882a593Smuzhiyun jornada_lcd_set_contrast(lcd_device, LCD_DEF_CONTRAST);
109*4882a593Smuzhiyun jornada_lcd_set_power(lcd_device, FB_BLANK_UNBLANK);
110*4882a593Smuzhiyun /* give it some time to startup */
111*4882a593Smuzhiyun msleep(100);
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun return 0;
114*4882a593Smuzhiyun }
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun static struct platform_driver jornada_lcd_driver = {
117*4882a593Smuzhiyun .probe = jornada_lcd_probe,
118*4882a593Smuzhiyun .driver = {
119*4882a593Smuzhiyun .name = "jornada_lcd",
120*4882a593Smuzhiyun },
121*4882a593Smuzhiyun };
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun module_platform_driver(jornada_lcd_driver);
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
126*4882a593Smuzhiyun MODULE_DESCRIPTION("HP Jornada 710/720/728 LCD driver");
127*4882a593Smuzhiyun MODULE_LICENSE("GPL");
128