Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vgg2432a4.c
Go to the documentation of this file.
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 <[email protected]>
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) |
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 |
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 |
101  }, {
102  .address = ILI9320_ENTRYMODE,
104  }, {
105  .address = ILI9320_RESIZING,
106  .value = 0x0,
107  },
108 };
109 
110 
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. */
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 
137 
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 
165 
166  ret = ili9320_write_regs(lcd, vgg_gamma, ARRAY_SIZE(vgg_gamma));
167  if (ret != 0)
168  goto err_vgg3;
169 
171  ili9320_write(lcd, ILI9320_HORIZ_END, cfg->hsize - 1);
173  ili9320_write(lcd, ILI9320_VERT_END, cfg->vsize - 1);
174 
176  ILI9320_DRIVER2_NL(((cfg->vsize - 240) / 8) + 0x1D));
177 
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);
192 
195  0x40);
196 
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
210 {
211  return ili9320_suspend(dev_get_drvdata(&spi->dev), state);
212 }
213 
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 
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 
243 static int __devexit vgg2432a4_remove(struct spi_device *spi)
244 {
245  return ili9320_remove(dev_get_drvdata(&spi->dev));
246 }
247 
248 static void vgg2432a4_shutdown(struct spi_device *spi)
249 {
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 module_spi_driver(vgg2432a4_driver);
266 
267 MODULE_AUTHOR("Ben Dooks <[email protected]>");
268 MODULE_DESCRIPTION("VGG2432A4 LCD Driver");
269 MODULE_LICENSE("GPL v2");
270 MODULE_ALIAS("spi:VGG2432A4");