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Source at commit dc637c9 created 12 years 4 months ago. By Xiangfu Liu, xburst: ben nanonote: first add WPAN(atben,atusb) driver take from qi-kernel.git thanks to Werner | |
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1 | From d7a92f8ccdca40672a2a242c756fb52c31b2bdba 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 12/32] Add ili8960 lcd driver |
5 | |
6 | --- |
7 | drivers/video/backlight/Kconfig | 7 + |
8 | drivers/video/backlight/Makefile | 1 + |
9 | drivers/video/backlight/ili8960.c | 263 +++++++++++++++++++++++++++++++++++++ |
10 | 3 files changed, 271 insertions(+), 0 deletions(-) |
11 | create mode 100644 drivers/video/backlight/ili8960.c |
12 | |
13 | diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig |
14 | index 2d93c8d..2fad528 100644 |
15 | --- a/drivers/video/backlight/Kconfig |
16 | +++ b/drivers/video/backlight/Kconfig |
17 | @@ -59,6 +59,13 @@ config LCD_LTV350QV |
18 | |
19 | The LTV350QV panel is present on all ATSTK1000 boards. |
20 | |
21 | +config LCD_ILI8960 |
22 | + tristate "Ilitek ili8960 LCD driver" |
23 | + depends on LCD_CLASS_DEVICE && SPI |
24 | + default n |
25 | + help |
26 | + Driver for the Ilitek ili8960 LCD controller chip. |
27 | + |
28 | config LCD_ILI9320 |
29 | tristate |
30 | help |
31 | diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile |
32 | index ee72adb..c7af746 100644 |
33 | --- a/drivers/video/backlight/Makefile |
34 | +++ b/drivers/video/backlight/Makefile |
35 | @@ -6,6 +6,7 @@ obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o |
36 | obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o |
37 | obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o |
38 | obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o |
39 | +obj-$(CONFIG_LCD_ILI8960) += ili8960.o |
40 | obj-$(CONFIG_LCD_ILI9320) += ili9320.o |
41 | obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o |
42 | obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o |
43 | diff --git a/drivers/video/backlight/ili8960.c b/drivers/video/backlight/ili8960.c |
44 | new file mode 100644 |
45 | index 0000000..1438e92 |
46 | --- /dev/null |
47 | +++ b/drivers/video/backlight/ili8960.c |
48 | @@ -0,0 +1,263 @@ |
49 | +/* |
50 | + * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> |
51 | + * Driver for Ilitek ili8960 LCD |
52 | + * |
53 | + * This program is free software; you can redistribute it and/or modify it |
54 | + * under the terms of the GNU General Public License as published by the |
55 | + * Free Software Foundation; either version 2 of the License, or (at your |
56 | + * option) any later version. |
57 | + * |
58 | + * You should have received a copy of the GNU General Public License along |
59 | + * with this program; if not, write to the Free Software Foundation, Inc., |
60 | + * 675 Mass Ave, Cambridge, MA 02139, USA. |
61 | + * |
62 | + */ |
63 | + |
64 | +#include <linux/module.h> |
65 | +#include <linux/spi/spi.h> |
66 | +#include <linux/lcd.h> |
67 | +#include <linux/backlight.h> |
68 | +#include <linux/delay.h> |
69 | + |
70 | +struct ili8960 { |
71 | + struct spi_device *spi; |
72 | + struct lcd_device *lcd; |
73 | + struct backlight_device *bl; |
74 | + bool enabled; |
75 | + unsigned int brightness; |
76 | +}; |
77 | + |
78 | +#define ILI8960_REG_BRIGHTNESS 0x03 |
79 | +#define ILI8960_REG_POWER 0x05 |
80 | +#define ILI8960_REG_CONTRAST 0x0d |
81 | + |
82 | +static int ili8960_write_reg(struct spi_device *spi, uint8_t reg, |
83 | + uint8_t data) |
84 | +{ |
85 | + uint8_t buf[2]; |
86 | + buf[0] = ((reg & 0x40) << 1) | (reg & 0x3f); |
87 | + buf[1] = data; |
88 | + |
89 | + return spi_write(spi, buf, sizeof(buf)); |
90 | +} |
91 | + |
92 | +static int ili8960_programm_power(struct spi_device *spi, bool enabled) |
93 | +{ |
94 | + int ret; |
95 | + |
96 | + if (enabled) |
97 | + mdelay(20); |
98 | + |
99 | + ret = ili8960_write_reg(spi, ILI8960_REG_POWER, enabled ? 0xc7 : 0xc6); |
100 | + |
101 | + if (!enabled) |
102 | + mdelay(20); |
103 | + |
104 | + return ret; |
105 | +} |
106 | + |
107 | +static int ili8960_set_power(struct lcd_device *lcd, int power) |
108 | +{ |
109 | + struct ili8960 *ili8960 = lcd_get_data(lcd); |
110 | + |
111 | + switch (power) { |
112 | + case FB_BLANK_UNBLANK: |
113 | + ili8960->enabled = true; |
114 | + break; |
115 | + default: |
116 | + ili8960->enabled = false; |
117 | + break; |
118 | + } |
119 | + |
120 | + return ili8960_programm_power(ili8960->spi, ili8960->enabled); |
121 | +} |
122 | + |
123 | +static int ili8960_get_power(struct lcd_device *lcd) |
124 | +{ |
125 | + struct ili8960 *ili8960 = lcd_get_data(lcd); |
126 | + return ili8960->enabled ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; |
127 | +} |
128 | + |
129 | +static int ili8960_set_contrast(struct lcd_device *lcd, int contrast) |
130 | +{ |
131 | + struct ili8960 *ili8960 = lcd_get_data(lcd); |
132 | + |
133 | + return ili8960_write_reg(ili8960->spi, ILI8960_REG_CONTRAST, contrast); |
134 | +} |
135 | + |
136 | +static int ili8960_set_mode(struct lcd_device *lcd, struct fb_videomode *mode) |
137 | +{ |
138 | + if (mode->xres != 320 && mode->yres != 240) |
139 | + return -EINVAL; |
140 | + |
141 | + return 0; |
142 | +} |
143 | + |
144 | +static int ili8960_set_brightness(struct ili8960 *ili8960, int brightness) |
145 | +{ |
146 | + int ret; |
147 | + |
148 | + ret = ili8960_write_reg(ili8960->spi, ILI8960_REG_BRIGHTNESS, brightness); |
149 | + |
150 | + if (ret == 0) |
151 | + ili8960->brightness = brightness; |
152 | + |
153 | + return ret; |
154 | +} |
155 | + |
156 | +static ssize_t ili8960_show_brightness(struct device *dev, |
157 | + struct device_attribute *attr, char *buf) |
158 | +{ |
159 | + struct lcd_device *ld = to_lcd_device(dev); |
160 | + struct ili8960 *ili8960 = lcd_get_data(ld); |
161 | + |
162 | + return sprintf(buf, "%u\n", ili8960->brightness); |
163 | +} |
164 | + |
165 | +static ssize_t ili8960_store_brightness(struct device *dev, |
166 | + struct device_attribute *attr, const char *buf, size_t count) |
167 | +{ |
168 | + struct lcd_device *ld = to_lcd_device(dev); |
169 | + struct ili8960 *ili8960 = lcd_get_data(ld); |
170 | + unsigned long brightness; |
171 | + int ret; |
172 | + |
173 | + ret = strict_strtoul(buf, 0, &brightness); |
174 | + if (ret) |
175 | + return ret; |
176 | + |
177 | + if (brightness > 255) |
178 | + return -EINVAL; |
179 | + |
180 | + ili8960_set_brightness(ili8960, brightness); |
181 | + |
182 | + return count; |
183 | +} |
184 | + |
185 | + |
186 | +static DEVICE_ATTR(brightness, 0644, ili8960_show_brightness, |
187 | + ili8960_store_brightness); |
188 | + |
189 | +static struct lcd_ops ili8960_lcd_ops = { |
190 | + .set_power = ili8960_set_power, |
191 | + .get_power = ili8960_get_power, |
192 | + .set_contrast = ili8960_set_contrast, |
193 | + .set_mode = ili8960_set_mode, |
194 | +}; |
195 | + |
196 | +static int __devinit ili8960_probe(struct spi_device *spi) |
197 | +{ |
198 | + int ret; |
199 | + struct ili8960 *ili8960; |
200 | + |
201 | + ili8960 = kmalloc(sizeof(*ili8960), GFP_KERNEL); |
202 | + if (!ili8960) |
203 | + return -ENOMEM; |
204 | + |
205 | + spi->bits_per_word = 8; |
206 | + spi->mode = SPI_MODE_3; |
207 | + |
208 | + ret = spi_setup(spi); |
209 | + if (ret) { |
210 | + dev_err(&spi->dev, "Failed to setup spi\n"); |
211 | + goto err_free_ili8960; |
212 | + } |
213 | + |
214 | + ili8960->spi = spi; |
215 | + |
216 | + ili8960->lcd = lcd_device_register("ili8960-lcd", &spi->dev, ili8960, |
217 | + &ili8960_lcd_ops); |
218 | + |
219 | + if (IS_ERR(ili8960->lcd)) { |
220 | + ret = PTR_ERR(ili8960->lcd); |
221 | + dev_err(&spi->dev, "Failed to register lcd device: %d\n", ret); |
222 | + goto err_free_ili8960; |
223 | + } |
224 | + |
225 | + ili8960->lcd->props.max_contrast = 255; |
226 | + |
227 | + ret = device_create_file(&ili8960->lcd->dev, &dev_attr_brightness); |
228 | + if (ret) |
229 | + goto err_unregister_lcd; |
230 | + |
231 | + ili8960_programm_power(ili8960->spi, true); |
232 | + ili8960->enabled = true; |
233 | + |
234 | + spi_set_drvdata(spi, ili8960); |
235 | + |
236 | + ili8960_write_reg(spi, 0x13, 0x01); |
237 | + |
238 | + return 0; |
239 | +err_unregister_lcd: |
240 | + lcd_device_unregister(ili8960->lcd); |
241 | +err_free_ili8960: |
242 | + kfree(ili8960); |
243 | + return ret; |
244 | +} |
245 | + |
246 | +static int __devexit ili8960_remove(struct spi_device *spi) |
247 | +{ |
248 | + struct ili8960 *ili8960 = spi_get_drvdata(spi); |
249 | + |
250 | + device_remove_file(&ili8960->lcd->dev, &dev_attr_brightness); |
251 | + lcd_device_unregister(ili8960->lcd); |
252 | + |
253 | + spi_set_drvdata(spi, NULL); |
254 | + kfree(ili8960); |
255 | + return 0; |
256 | +} |
257 | + |
258 | +#ifdef CONFIG_PM |
259 | + |
260 | +static int ili8960_suspend(struct spi_device *spi, pm_message_t state) |
261 | +{ |
262 | + struct ili8960 *ili8960 = spi_get_drvdata(spi); |
263 | + |
264 | + if (ili8960->enabled) |
265 | + ili8960_programm_power(ili8960->spi, false); |
266 | + |
267 | + return 0; |
268 | +} |
269 | + |
270 | +static int ili8960_resume(struct spi_device *spi) |
271 | +{ |
272 | + struct ili8960 *ili8960 = spi_get_drvdata(spi); |
273 | + |
274 | + if (ili8960->enabled) |
275 | + ili8960_programm_power(ili8960->spi, true); |
276 | + |
277 | + return 0; |
278 | +} |
279 | + |
280 | +#else |
281 | +#define ili8960_suspend NULL |
282 | +#define ili8960_resume NULL |
283 | +#endif |
284 | + |
285 | +static struct spi_driver ili8960_driver = { |
286 | + .driver = { |
287 | + .name = "ili8960", |
288 | + .owner = THIS_MODULE, |
289 | + }, |
290 | + .probe = ili8960_probe, |
291 | + .remove = __devexit_p(ili8960_remove), |
292 | + .suspend = ili8960_suspend, |
293 | + .resume = ili8960_resume, |
294 | +}; |
295 | + |
296 | +static int __init ili8960_init(void) |
297 | +{ |
298 | + return spi_register_driver(&ili8960_driver); |
299 | +} |
300 | +module_init(ili8960_init); |
301 | + |
302 | +static void __exit ili8960_exit(void) |
303 | +{ |
304 | + spi_unregister_driver(&ili8960_driver); |
305 | +} |
306 | +module_exit(ili8960_exit) |
307 | + |
308 | +MODULE_AUTHOR("Lars-Peter Clausen"); |
309 | +MODULE_LICENSE("GPL"); |
310 | +MODULE_DESCRIPTION("LCD driver for Ilitek ili8960"); |
311 | +MODULE_ALIAS("spi:ili8960"); |
312 | -- |
313 | 1.7.4.1 |
314 | |
315 |