[go: nahoru, domu]
1/* drivers/video/backlight/vgg2432a4.c
2 *
3 * VGG2432A4 (ILI9320) LCD controller driver.
4 *
5 * Copyright 2007 Simtec Electronics
6 *	http://armlinux.simtec.co.uk/
7 *	Ben Dooks <ben@simtec.co.uk>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/delay.h>
15#include <linux/err.h>
16#include <linux/fb.h>
17#include <linux/init.h>
18#include <linux/lcd.h>
19#include <linux/module.h>
20
21#include <linux/spi/spi.h>
22
23#include <video/ili9320.h>
24
25#include "ili9320.h"
26
27/* Device initialisation sequences */
28
29static const struct ili9320_reg vgg_init1[] = {
30	{
31		.address = ILI9320_POWER1,
32		.value	 = ILI9320_POWER1_AP(0) | ILI9320_POWER1_BT(0),
33	}, {
34		.address = ILI9320_POWER2,
35		.value	 = (ILI9320_POWER2_VC(7) |
36			    ILI9320_POWER2_DC0(0) | ILI9320_POWER2_DC1(0)),
37	}, {
38		.address = ILI9320_POWER3,
39		.value	 = ILI9320_POWER3_VRH(0),
40	}, {
41		.address = ILI9320_POWER4,
42		.value	 = ILI9320_POWER4_VREOUT(0),
43	},
44};
45
46static const struct ili9320_reg vgg_init2[] = {
47	{
48		.address = ILI9320_POWER1,
49		.value   = (ILI9320_POWER1_AP(3) | ILI9320_POWER1_APE |
50			    ILI9320_POWER1_BT(7) | ILI9320_POWER1_SAP),
51	}, {
52		.address = ILI9320_POWER2,
53		.value   = ILI9320_POWER2_VC(7) | ILI9320_POWER2_DC0(3),
54	}
55};
56
57static const struct ili9320_reg vgg_gamma[] = {
58	{
59		.address = ILI9320_GAMMA1,
60		.value	 = 0x0000,
61	}, {
62		.address = ILI9320_GAMMA2,
63		.value   = 0x0505,
64	}, {
65		.address = ILI9320_GAMMA3,
66		.value	 = 0x0004,
67	}, {
68		.address = ILI9320_GAMMA4,
69		.value	 = 0x0006,
70	}, {
71		.address = ILI9320_GAMMA5,
72		.value	 = 0x0707,
73	}, {
74		.address = ILI9320_GAMMA6,
75		.value	 = 0x0105,
76	}, {
77		.address = ILI9320_GAMMA7,
78		.value	 = 0x0002,
79	}, {
80		.address = ILI9320_GAMMA8,
81		.value	 = 0x0707,
82	}, {
83		.address = ILI9320_GAMMA9,
84		.value	 = 0x0704,
85	}, {
86		.address = ILI9320_GAMMA10,
87		.value	 = 0x807,
88	}
89
90};
91
92static const struct ili9320_reg vgg_init0[] = {
93	[0]	= {
94		/* set direction and scan mode gate */
95		.address = ILI9320_DRIVER,
96		.value	 = ILI9320_DRIVER_SS,
97	}, {
98		.address = ILI9320_DRIVEWAVE,
99		.value	 = (ILI9320_DRIVEWAVE_MUSTSET |
100			    ILI9320_DRIVEWAVE_EOR | ILI9320_DRIVEWAVE_BC),
101	}, {
102		.address = ILI9320_ENTRYMODE,
103		.value	 = ILI9320_ENTRYMODE_ID(3) | ILI9320_ENTRYMODE_BGR,
104	}, {
105		.address = ILI9320_RESIZING,
106		.value	 = 0x0,
107	},
108};
109
110
111static int vgg2432a4_lcd_init(struct ili9320 *lcd,
112			      struct ili9320_platdata *cfg)
113{
114	unsigned int addr;
115	int ret;
116
117	/* Set VCore before anything else (VGG243237-6UFLWA) */
118	ret = ili9320_write(lcd, 0x00e5, 0x8000);
119	if (ret)
120		goto err_initial;
121
122	/* Start the oscillator up before we can do anything else. */
123	ret = ili9320_write(lcd, ILI9320_OSCILATION, ILI9320_OSCILATION_OSC);
124	if (ret)
125		goto err_initial;
126
127	/* must wait at-lesat 10ms after starting */
128	mdelay(15);
129
130	ret = ili9320_write_regs(lcd, vgg_init0, ARRAY_SIZE(vgg_init0));
131	if (ret != 0)
132		goto err_initial;
133
134	ili9320_write(lcd, ILI9320_DISPLAY2, cfg->display2);
135	ili9320_write(lcd, ILI9320_DISPLAY3, cfg->display3);
136	ili9320_write(lcd, ILI9320_DISPLAY4, cfg->display4);
137
138	ili9320_write(lcd, ILI9320_RGB_IF1, cfg->rgb_if1);
139	ili9320_write(lcd, ILI9320_FRAMEMAKER, 0x0);
140	ili9320_write(lcd, ILI9320_RGB_IF2, cfg->rgb_if2);
141
142	ret = ili9320_write_regs(lcd, vgg_init1, ARRAY_SIZE(vgg_init1));
143	if (ret != 0)
144		goto err_vgg;
145
146	mdelay(300);
147
148	ret = ili9320_write_regs(lcd, vgg_init2, ARRAY_SIZE(vgg_init2));
149	if (ret != 0)
150		goto err_vgg2;
151
152	mdelay(100);
153
154	ili9320_write(lcd, ILI9320_POWER3, 0x13c);
155
156	mdelay(100);
157
158	ili9320_write(lcd, ILI9320_POWER4, 0x1c00);
159	ili9320_write(lcd, ILI9320_POWER7, 0x000e);
160
161	mdelay(100);
162
163	ili9320_write(lcd, ILI9320_GRAM_HORIZ_ADDR, 0x00);
164	ili9320_write(lcd, ILI9320_GRAM_VERT_ADD, 0x00);
165
166	ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
167	if (ret != 0)
168		goto err_vgg3;
169
170	ili9320_write(lcd, ILI9320_HORIZ_START, 0x0);
171	ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
172	ili9320_write(lcd, ILI9320_VERT_START, 0x0);
173	ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
174
175	ili9320_write(lcd, ILI9320_DRIVER2,
176		      ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
177
178	ili9320_write(lcd, ILI9320_BASE_IMAGE, 0x1);
179	ili9320_write(lcd, ILI9320_VERT_SCROLL, 0x00);
180
181	for (addr = ILI9320_PARTIAL1_POSITION; addr <= ILI9320_PARTIAL2_END;
182	     addr++) {
183		ili9320_write(lcd, addr, 0x0);
184	}
185
186	ili9320_write(lcd, ILI9320_INTERFACE1, 0x10);
187	ili9320_write(lcd, ILI9320_INTERFACE2, cfg->interface2);
188	ili9320_write(lcd, ILI9320_INTERFACE3, cfg->interface3);
189	ili9320_write(lcd, ILI9320_INTERFACE4, cfg->interface4);
190	ili9320_write(lcd, ILI9320_INTERFACE5, cfg->interface5);
191	ili9320_write(lcd, ILI9320_INTERFACE6, cfg->interface6);
192
193	lcd->display1 = (ILI9320_DISPLAY1_D(3) | ILI9320_DISPLAY1_DTE |
194			 ILI9320_DISPLAY1_GON | ILI9320_DISPLAY1_BASEE |
195			 0x40);
196
197	ili9320_write(lcd, ILI9320_DISPLAY1, lcd->display1);
198
199	return 0;
200
201 err_vgg3:
202 err_vgg2:
203 err_vgg:
204 err_initial:
205	return ret;
206}
207
208#ifdef CONFIG_PM_SLEEP
209static int vgg2432a4_suspend(struct device *dev)
210{
211	return ili9320_suspend(dev_get_drvdata(dev));
212}
213static int vgg2432a4_resume(struct device *dev)
214{
215	return ili9320_resume(dev_get_drvdata(dev));
216}
217#endif
218
219static struct ili9320_client vgg2432a4_client = {
220	.name	= "VGG2432A4",
221	.init	= vgg2432a4_lcd_init,
222};
223
224/* Device probe */
225
226static int vgg2432a4_probe(struct spi_device *spi)
227{
228	int ret;
229
230	ret = ili9320_probe_spi(spi, &vgg2432a4_client);
231	if (ret != 0) {
232		dev_err(&spi->dev, "failed to initialise ili9320\n");
233		return ret;
234	}
235
236	return 0;
237}
238
239static int vgg2432a4_remove(struct spi_device *spi)
240{
241	return ili9320_remove(spi_get_drvdata(spi));
242}
243
244static void vgg2432a4_shutdown(struct spi_device *spi)
245{
246	ili9320_shutdown(spi_get_drvdata(spi));
247}
248
249static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
250
251static struct spi_driver vgg2432a4_driver = {
252	.driver = {
253		.name		= "VGG2432A4",
254		.owner		= THIS_MODULE,
255		.pm		= &vgg2432a4_pm_ops,
256	},
257	.probe		= vgg2432a4_probe,
258	.remove		= vgg2432a4_remove,
259	.shutdown	= vgg2432a4_shutdown,
260};
261
262module_spi_driver(vgg2432a4_driver);
263
264MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
265MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
266MODULE_LICENSE("GPL v2");
267MODULE_ALIAS("spi:VGG2432A4");
268