1// SPDX-License-Identifier: GPL-2.0-only
2/* drivers/video/backlight/vgg2432a4.c
3 *
4 * VGG2432A4 (ILI9320) LCD controller driver.
5 *
6 * Copyright 2007 Simtec Electronics
7 *	http://armlinux.simtec.co.uk/
8 *	Ben Dooks <ben@simtec.co.uk>
9*/
10
11#include <linux/delay.h>
12#include <linux/err.h>
13#include <linux/fb.h>
14#include <linux/init.h>
15#include <linux/lcd.h>
16#include <linux/module.h>
17
18#include <linux/spi/spi.h>
19
20#include <video/ili9320.h>
21
22#include "ili9320.h"
23
24/* Device initialisation sequences */
25
26static const struct ili9320_reg vgg_init1[] = {
27	{
28		.address = ILI9320_POWER1,
29		.value	 = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
30	}, {
31		.address = ILI9320_POWER2,
32		.value	 = (ILI9320_POWER2_VC(7) |
33			    ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
34	}, {
35		.address = ILI9320_POWER3,
36		.value	 = ILI9320_POWER3_VRH(0),
37	}, {
38		.address = ILI9320_POWER4,
39		.value	 = ILI9320_POWER4_VREOUT(0),
40	},
41};
42
43static const struct ili9320_reg vgg_init2[] = {
44	{
45		.address = ILI9320_POWER1,
46		.value   = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
47			    ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
48	}, {
49		.address = ILI9320_POWER2,
50		.value   = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
51	}
52};
53
54static const struct ili9320_reg vgg_gamma[] = {
55	{
56		.address = ILI9320_GAMMA1,
57		.value	 = 0x0000,
58	}, {
59		.address = ILI9320_GAMMA2,
60		.value   = 0x0505,
61	}, {
62		.address = ILI9320_GAMMA3,
63		.value	 = 0x0004,
64	}, {
65		.address = ILI9320_GAMMA4,
66		.value	 = 0x0006,
67	}, {
68		.address = ILI9320_GAMMA5,
69		.value	 = 0x0707,
70	}, {
71		.address = ILI9320_GAMMA6,
72		.value	 = 0x0105,
73	}, {
74		.address = ILI9320_GAMMA7,
75		.value	 = 0x0002,
76	}, {
77		.address = ILI9320_GAMMA8,
78		.value	 = 0x0707,
79	}, {
80		.address = ILI9320_GAMMA9,
81		.value	 = 0x0704,
82	}, {
83		.address = ILI9320_GAMMA10,
84		.value	 = 0x807,
85	}
86
87};
88
89static const struct ili9320_reg vgg_init0[] = {
90	[0]	= {
91		/* set direction and scan mode gate */
92		.address = ILI9320_DRIVER,
93		.value	 = ILI9320_DRIVER_SS,
94	}, {
95		.address = ILI9320_DRIVEWAVE,
96		.value	 = (ILI9320_DRIVEWAVE_MUSTSET |
97			    ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
98	}, {
99		.address = ILI9320_ENTRYMODE,
100		.value	 = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
101	}, {
102		.address = ILI9320_RESIZING,
103		.value	 = 0x0,
104	},
105};
106
107
108static int vgg2432a4_lcd_init(struct ili9320 *lcd,
109			      struct ili9320_platdata *cfg)
110{
111	unsigned int addr;
112	int ret;
113
114	/* Set VCore before anything else (VGG243237-6UFLWA) */
115	ret = ili9320_write(lcd, 0x00e5, 0x8000);
116	if (ret)
117		goto err_initial;
118
119	/* Start the oscillator up before we can do anything else. */
120	ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
121	if (ret)
122		goto err_initial;
123
124	/* must wait at-lesat 10ms after starting */
125	mdelay(15);
126
127	ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
128	if (ret != 0)
129		goto err_initial;
130
131	ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
132	ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
133	ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
134
135	ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
136	ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
137	ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);
138
139	ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
140	if (ret != 0)
141		goto err_vgg;
142
143	mdelay(300);
144
145	ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
146	if (ret != 0)
147		goto err_vgg2;
148
149	mdelay(100);
150
151	ili9320_write(lcd, ILI9320_POWER3, 0x13c);
152
153	mdelay(100);
154
155	ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
156	ili9320_write(lcd, ILI9320_POWER7, 0x000e);
157
158	mdelay(100);
159
160	ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
161	ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
162
163	ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
164	if (ret != 0)
165		goto err_vgg3;
166
167	ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
168	ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
169	ili9320_write(lcd, ILI9320_VERT_START, 0x0);
170	ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
171
172	ili9320_write(lcd, ILI9320_DRIVER2,
173		      ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
174
175	ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
176	ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
177
178	for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
179	     addr++) {
180		ili9320_write(lcd, addr, 0x0);
181	}
182
183	ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
184	ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
185	ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
186	ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
187	ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
188	ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
189
190	lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
191			 ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
192			 0x40);
193
194	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
195
196	return 0;
197
198 err_vgg3:
199 err_vgg2:
200 err_vgg:
201 err_initial:
202	return ret;
203}
204
205#ifdef CONFIG_PM_SLEEP
206static int vgg2432a4_suspend(struct device *dev)
207{
208	return ili9320_suspend(dev_get_drvdata(dev));
209}
210static int vgg2432a4_resume(struct device *dev)
211{
212	return ili9320_resume(dev_get_drvdata(dev));
213}
214#endif
215
216static struct ili9320_client vgg2432a4_client = {
217	.name	= "VGG2432A4",
218	.init	= vgg2432a4_lcd_init,
219};
220
221/* Device probe */
222
223static int vgg2432a4_probe(struct spi_device *spi)
224{
225	int ret;
226
227	ret = ili9320_probe_spi(spi, &vgg2432a4_client);
228	if (ret != 0) {
229		dev_err(&spi->dev, "failed to initialise ili9320\n");
230		return ret;
231	}
232
233	return 0;
234}
235
236static void vgg2432a4_remove(struct spi_device *spi)
237{
238	ili9320_remove(spi_get_drvdata(spi));
239}
240
241static void vgg2432a4_shutdown(struct spi_device *spi)
242{
243	ili9320_shutdown(spi_get_drvdata(spi));
244}
245
246static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
247
248static struct spi_driver vgg2432a4_driver = {
249	.driver = {
250		.name		= "VGG2432A4",
251		.pm		= &vgg2432a4_pm_ops,
252	},
253	.probe		= vgg2432a4_probe,
254	.remove		= vgg2432a4_remove,
255	.shutdown	= vgg2432a4_shutdown,
256};
257
258module_spi_driver(vgg2432a4_driver);
259
260MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
261MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
262MODULE_LICENSE("GPL v2");
263MODULE_ALIAS("spi:VGG2432A4");
264