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 
29 static 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 
46 static 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 
57 static 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 
92 static 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 
vgg2432a4_lcd_init(struct ili9320 * lcd,struct ili9320_platdata * cfg)111 static 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
vgg2432a4_suspend(struct spi_device * spi,pm_message_t state)209 static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
210 {
211 	return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
212 }
213 
vgg2432a4_resume(struct spi_device * spi)214 static int vgg2432a4_resume(struct spi_device *spi)
215 {
216 	return ili9320_resume(dev_get_drvdata(&spi->dev));
217 }
218 #else
219 #define vgg2432a4_suspend	NULL
220 #define vgg2432a4_resume 	NULL
221 #endif
222 
223 static struct ili9320_client vgg2432a4_client = {
224 	.name	= "VGG2432A4",
225 	.init	= vgg2432a4_lcd_init,
226 };
227 
228 /* Device probe */
229 
vgg2432a4_probe(struct spi_device * spi)230 static int __devinit vgg2432a4_probe(struct spi_device *spi)
231 {
232 	int ret;
233 
234 	ret = ili9320_probe_spi(spi, &vgg2432a4_client);
235 	if (ret != 0) {
236 		dev_err(&spi->dev, "failed to initialise ili9320\n");
237 		return ret;
238 	}
239 
240 	return 0;
241 }
242 
vgg2432a4_remove(struct spi_device * spi)243 static int __devexit vgg2432a4_remove(struct spi_device *spi)
244 {
245 	return ili9320_remove(dev_get_drvdata(&spi->dev));
246 }
247 
vgg2432a4_shutdown(struct spi_device * spi)248 static void vgg2432a4_shutdown(struct spi_device *spi)
249 {
250 	ili9320_shutdown(dev_get_drvdata(&spi->dev));
251 }
252 
253 static struct spi_driver vgg2432a4_driver = {
254 	.driver = {
255 		.name		= "VGG2432A4",
256 		.owner		= THIS_MODULE,
257 	},
258 	.probe		= vgg2432a4_probe,
259 	.remove		= __devexit_p(vgg2432a4_remove),
260 	.shutdown	= vgg2432a4_shutdown,
261 	.suspend	= vgg2432a4_suspend,
262 	.resume		= vgg2432a4_resume,
263 };
264 
265 /* Device driver initialisation */
266 
vgg2432a4_init(void)267 static int __init vgg2432a4_init(void)
268 {
269 	return spi_register_driver(&vgg2432a4_driver);
270 }
271 
vgg2432a4_exit(void)272 static void __exit vgg2432a4_exit(void)
273 {
274 	spi_unregister_driver(&vgg2432a4_driver);
275 }
276 
277 module_init(vgg2432a4_init);
278 module_exit(vgg2432a4_exit);
279 
280 MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>");
281 MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
282 MODULE_LICENSE("GPL v2");
283 MODULE_ALIAS("spi:VGG2432A4");
284