[xburst] Add 2.6.37 support
[openwrt.git] / target / linux / xburst / patches-2.6.35 / 101-lcm.patch
1 From 2e27414748a56d8583c151d926da54e7e9d2c23f Mon Sep 17 00:00:00 2001
2 From: Lars-Peter Clausen <lars@metafoo.de>
3 Date: Sun, 1 Aug 2010 21:19:40 +0200
4 Subject: [PATCH] Add ili8960 lcd driver
5
6 ---
7  drivers/video/backlight/Kconfig   |    7 +
8  drivers/video/backlight/Makefile  |    1 +
9  drivers/video/backlight/ili8960.c |  254 +++++++++++++++++++++++++++++++++++++
10  3 files changed, 262 insertions(+), 0 deletions(-)
11  create mode 100644 drivers/video/backlight/ili8960.c
12
13 --- a/drivers/video/backlight/Kconfig
14 +++ b/drivers/video/backlight/Kconfig
15 @@ -59,6 +59,13 @@ config LCD_LTV350QV
16  
17           The LTV350QV panel is present on all ATSTK1000 boards.
18  
19 +config LCD_ILI8960
20 +       tristate "Ilitek ili8960 LCD driver"
21 +       depends on LCD_CLASS_DEVICE && SPI
22 +       default n
23 +       help
24 +         Driver for the Ilitek ili8960 LCD controller chip.
25 +
26  config LCD_ILI9320
27         tristate
28         help
29 --- a/drivers/video/backlight/Makefile
30 +++ b/drivers/video/backlight/Makefile
31 @@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700)            += jornada72
32  obj-$(CONFIG_LCD_L4F00242T03)     += l4f00242t03.o
33  obj-$(CONFIG_LCD_LMS283GF05)      += lms283gf05.o
34  obj-$(CONFIG_LCD_LTV350QV)        += ltv350qv.o
35 +obj-$(CONFIG_LCD_ILI8960)         += ili8960.o
36  obj-$(CONFIG_LCD_ILI9320)         += ili9320.o
37  obj-$(CONFIG_LCD_PLATFORM)        += platform_lcd.o
38  obj-$(CONFIG_LCD_VGG2432A4)       += vgg2432a4.o
39 --- /dev/null
40 +++ b/drivers/video/backlight/ili8960.c
41 @@ -0,0 +1,254 @@
42 +/*
43 + *  Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
44 + *  Driver for Ilitek ili8960 LCD
45 + *
46 + *  This program is free software; you can redistribute         it and/or modify it
47 + *  under  the terms of         the GNU General  Public License as published by the
48 + *  Free Software Foundation;  either version 2 of the License, or (at your
49 + *  option) any later version.
50 + *
51 + *  You should have received a copy of the  GNU General Public License along
52 + *  with this program; if not, write  to the Free Software Foundation, Inc.,
53 + *  675 Mass Ave, Cambridge, MA 02139, USA.
54 + *
55 + */
56 +
57 +#include <linux/module.h>
58 +#include <linux/spi/spi.h>
59 +#include <linux/lcd.h>
60 +#include <linux/backlight.h>
61 +#include <linux/delay.h>
62 +
63 +struct ili8960 {
64 +       struct spi_device *spi;
65 +       struct lcd_device *lcd;
66 +       struct backlight_device *bl;
67 +       unsigned enabled:1;
68 +};
69 +
70 +static int ili8960_write_reg(struct spi_device *spi, uint8_t reg,
71 +                               uint8_t data)
72 +{
73 +       uint8_t buf[2];
74 +       buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f);
75 +       buf[1] = data;
76 +
77 +       return spi_write(spi, buf, sizeof(buf));
78 +}
79 +
80 +static void ili8960_power_disable(struct spi_device *spi)
81 +{
82 +       int ret = ili8960_write_reg(spi, 0x5, 0xc6) ;
83 +       if (ret < 0)
84 +               dev_err(&spi->dev, "Failed to disable power: %d\n", ret);
85 +}
86 +
87 +static void ili8960_power_enable(struct spi_device *spi)
88 +{
89 +       ili8960_write_reg(spi, 0x5, 0xc7);
90 +}
91 +
92 +
93 +static int ili8960_set_power(struct lcd_device *lcd, int power)
94 +{
95 +       struct ili8960 *ili8960 = lcd_get_data(lcd);
96 +
97 +       switch (power) {
98 +       case FB_BLANK_UNBLANK:
99 +               mdelay(20);
100 +               ili8960->enabled = 1;
101 +               ili8960_power_enable(ili8960->spi);
102 +               break;
103 +       default:
104 +               ili8960->enabled = 0;
105 +               ili8960_power_disable(ili8960->spi);
106 +               mdelay(20);
107 +               break;
108 +       }
109 +       return 0;
110 +}
111 +
112 +static int ili8960_set_contrast(struct lcd_device *lcd, int contrast)
113 +{
114 +       struct ili8960 *ili8960 = lcd_get_data(lcd);
115 +       ili8960_write_reg(ili8960->spi, 0x0d, contrast);
116 +       return 0;
117 +}
118 +
119 +static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode)
120 +{
121 +       if (mode->xres != 320 && mode->yres != 240)
122 +               return -EINVAL;
123 +
124 +       return 0;
125 +}
126 +
127 +static ssize_t reg_write(struct device *dev, struct device_attribute *attr,
128 +                                               const char *buf, size_t count)
129 +{
130 +       char *buf2;
131 +       uint32_t reg = simple_strtoul(buf, &buf2, 10);
132 +       uint32_t val = simple_strtoul(buf2 + 1, NULL, 10);
133 +       struct ili8960 *ili8960 = dev_get_drvdata(dev);
134 +
135 +       if (reg < 0 || val < 0)
136 +               return -EINVAL;
137 +
138 +       ili8960_write_reg(ili8960->spi, reg, val);
139 +       return count;
140 +}
141 +
142 +static DEVICE_ATTR(reg, 0644, NULL, reg_write);
143 +
144 +static ssize_t ili8960_show_brightness(struct device *dev,
145 +               struct device_attribute *attr, char *buf)
146 +{
147 +       int rc = -ENXIO;
148 +
149 +       return rc;
150 +}
151 +
152 +static ssize_t ili8960_store_brightness(struct device *dev,
153 +               struct device_attribute *attr, const char *buf, size_t count)
154 +{
155 +       char *endp;
156 +       struct lcd_device *ld = to_lcd_device(dev);
157 +       struct ili8960 *ili8960 = lcd_get_data(ld);
158 +       int brightness = simple_strtoul(buf, &endp, 0);
159 +
160 +       if (brightness > 255 || brightness < 0)
161 +               return -EINVAL;
162 +
163 +       ili8960_write_reg(ili8960->spi, 0x3, brightness);
164 +
165 +       return count;
166 +}
167 +
168 +
169 +static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness,
170 +       ili8960_store_brightness);
171 +
172 +static struct lcd_ops ili8960_lcd_ops = {
173 +       .set_power = ili8960_set_power,
174 +       .set_contrast = ili8960_set_contrast,
175 +       .set_mode = ili8960_set_mode,
176 +};
177 +
178 +static int __devinit ili8960_probe(struct spi_device *spi)
179 +{
180 +       int ret;
181 +       struct ili8960 *ili8960;
182 +
183 +       ili8960 = kmalloc(sizeof(*ili8960), GFP_KERNEL);
184 +
185 +       spi->bits_per_word = 8;
186 +       spi->mode = SPI_MODE_3 | SPI_3WIRE;
187 +
188 +       ret = spi_setup(spi);
189 +       if (ret) {
190 +               dev_err(&spi->dev, "Failed to setup spi\n");
191 +               goto err_free_ili8960;
192 +       }
193 +
194 +       ili8960->spi = spi;
195 +
196 +       ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960,
197 +                                               &ili8960_lcd_ops);
198 +
199 +       if (IS_ERR(ili8960->lcd)) {
200 +               ret = PTR_ERR(ili8960->lcd);
201 +               dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret);
202 +               goto err_free_ili8960;
203 +       }
204 +
205 +       ili8960->lcd->props.max_contrast = 255;
206 +
207 +       ret = device_create_file(&spi->dev, &dev_attr_reg);
208 +       if (ret)
209 +               goto err_unregister_lcd;
210 +
211 +       ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness);
212 +       if (ret)
213 +               goto err_unregister_lcd;
214 +
215 +       ili8960->enabled = 1;
216 +       dev_set_drvdata(&spi->dev, ili8960);
217 +
218 +       ili8960_write_reg(spi, 0x13, 0x01);
219 +       ili8960_write_reg(spi, 0x5, 0xc7);
220 +
221 +       return 0;
222 +err_unregister_lcd:
223 +       lcd_device_unregister(ili8960->lcd);
224 +err_free_ili8960:
225 +       kfree(ili8960);
226 +       return ret;
227 +}
228 +
229 +static int __devexit ili8960_remove(struct spi_device *spi)
230 +{
231 +       struct ili8960 *ili8960 = spi_get_drvdata(spi);
232 +#if 0
233 +       if (ili8960->bl)
234 +               backlight_device_unregister(ili8960->bl);
235 +#endif
236 +
237 +       lcd_device_unregister(ili8960->lcd);
238 +
239 +       spi_set_drvdata(spi, NULL);
240 +       kfree(ili8960);
241 +       return 0;
242 +}
243 +
244 +#ifdef CONFIG_PM
245 +
246 +static int ili8960_suspend(struct spi_device *spi, pm_message_t state)
247 +{
248 +       struct ili8960 *ili8960 = spi_get_drvdata(spi);
249 +       if (ili8960->enabled) {
250 +               ili8960_power_disable(spi);
251 +               mdelay(10);
252 +       }
253 +       return 0;
254 +}
255 +
256 +static int ili8960_resume(struct spi_device *spi)
257 +{
258 +       struct ili8960 *ili8960 = spi_get_drvdata(spi);
259 +       if (ili8960->enabled)
260 +               ili8960_power_enable(spi);
261 +       return 0;
262 +}
263 +
264 +#else
265 +#define ili8960_suspend NULL
266 +#define ili8960_resume NULL
267 +#endif
268 +
269 +static struct spi_driver ili8960_driver = {
270 +       .driver = {
271 +               .name = "ili8960",
272 +               .owner = THIS_MODULE,
273 +       },
274 +       .probe = ili8960_probe,
275 +       .remove = __devexit_p(ili8960_remove),
276 +       .suspend = ili8960_suspend,
277 +       .resume = ili8960_resume,
278 +};
279 +
280 +static int __init ili8960_init(void)
281 +{
282 +       return spi_register_driver(&ili8960_driver);
283 +}
284 +module_init(ili8960_init);
285 +
286 +static void __exit ili8960_exit(void)
287 +{
288 +       return spi_unregister_driver(&ili8960_driver);
289 +}
290 +module_exit(ili8960_exit)
291 +
292 +MODULE_AUTHOR("Lars-Peter Clausen");
293 +MODULE_LICENSE("GPL v2");
294 +MODULE_DESCRIPTION("LCD driver for Ilitek ili8960");
295 +MODULE_ALIAS("spi:ili8960");