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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-10-13 12:13:56 -0400
committerDavid Woodhouse <David.Woodhouse@intel.com>2008-10-13 12:13:56 -0400
commite758936e02700ff88a0b08b722a3847b95283ef2 (patch)
tree50c919bef1b459a778b85159d5929de95b6c4a01 /drivers/video/backlight
parent239cfbde1f5843c4a24199f117d5f67f637d72d5 (diff)
parent4480f15b3306f43bbb0310d461142b4e897ca45b (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: include/asm-x86/statfs.h
Diffstat (limited to 'drivers/video/backlight')
-rw-r--r--drivers/video/backlight/Kconfig15
-rw-r--r--drivers/video/backlight/Makefile2
-rw-r--r--drivers/video/backlight/corgi_lcd.c641
-rw-r--r--drivers/video/backlight/lcd.c18
-rw-r--r--drivers/video/backlight/tdo24m.c396
5 files changed, 1069 insertions, 3 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 452b770d8cc9..c72a13562954 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -24,6 +24,13 @@ config LCD_CLASS_DEVICE
24 To have support for your specific LCD panel you will have to 24 To have support for your specific LCD panel you will have to
25 select the proper drivers which depend on this option. 25 select the proper drivers which depend on this option.
26 26
27config LCD_CORGI
28 tristate "LCD Panel support for SHARP corgi/spitz model"
29 depends on LCD_CLASS_DEVICE && SPI_MASTER && PXA_SHARPSL
30 help
31 Say y here to support the LCD panels usually found on SHARP
32 corgi (C7x0) and spitz (Cxx00) models.
33
27config LCD_LTV350QV 34config LCD_LTV350QV
28 tristate "Samsung LTV350QV LCD Panel" 35 tristate "Samsung LTV350QV LCD Panel"
29 depends on LCD_CLASS_DEVICE && SPI_MASTER 36 depends on LCD_CLASS_DEVICE && SPI_MASTER
@@ -44,6 +51,14 @@ config LCD_ILI9320
44 If you have a panel based on the ILI9320 controller chip 51 If you have a panel based on the ILI9320 controller chip
45 then say y to include a power driver for it. 52 then say y to include a power driver for it.
46 53
54config LCD_TDO24M
55 tristate "Toppoly TDO24M LCD Panels support"
56 depends on LCD_CLASS_DEVICE && SPI_MASTER
57 default n
58 help
59 If you have a Toppoly TDO24M series LCD panel, say y here to
60 include the support for it.
61
47config LCD_VGG2432A4 62config LCD_VGG2432A4
48 tristate "VGG2432A4 LCM device support" 63 tristate "VGG2432A4 LCM device support"
49 depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER 64 depends on BACKLIGHT_LCD_SUPPORT && LCD_CLASS_DEVICE && SPI_MASTER
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index b405aace803f..3ec551eb472c 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -1,10 +1,12 @@
1# Backlight & LCD drivers 1# Backlight & LCD drivers
2 2
3obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o 3obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o
4obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o
4obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o 5obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
5obj-$(CONFIG_LCD_ILI9320) += ili9320.o 6obj-$(CONFIG_LCD_ILI9320) += ili9320.o
6obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o 7obj-$(CONFIG_LCD_PLATFORM) += platform_lcd.o
7obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o 8obj-$(CONFIG_LCD_VGG2432A4) += vgg2432a4.o
9obj-$(CONFIG_LCD_TDO24M) += tdo24m.o
8 10
9obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o 11obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
10obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o 12obj-$(CONFIG_BACKLIGHT_ATMEL_PWM) += atmel-pwm-bl.o
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c
new file mode 100644
index 000000000000..2afd47eefe74
--- /dev/null
+++ b/drivers/video/backlight/corgi_lcd.c
@@ -0,0 +1,641 @@
1/*
2 * LCD/Backlight Driver for Sharp Zaurus Handhelds (various models)
3 *
4 * Copyright (c) 2004-2006 Richard Purdie
5 *
6 * Based on Sharp's 2.4 Backlight Driver
7 *
8 * Copyright (c) 2008 Marvell International Ltd.
9 * Converted to SPI device based LCD/Backlight device driver
10 * by Eric Miao <eric.miao@marvell.com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 *
16 */
17
18#include <linux/module.h>
19#include <linux/kernel.h>
20#include <linux/init.h>
21#include <linux/delay.h>
22#include <linux/gpio.h>
23#include <linux/fb.h>
24#include <linux/lcd.h>
25#include <linux/spi/spi.h>
26#include <linux/spi/corgi_lcd.h>
27#include <asm/mach/sharpsl_param.h>
28
29#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
30
31/* Register Addresses */
32#define RESCTL_ADRS 0x00
33#define PHACTRL_ADRS 0x01
34#define DUTYCTRL_ADRS 0x02
35#define POWERREG0_ADRS 0x03
36#define POWERREG1_ADRS 0x04
37#define GPOR3_ADRS 0x05
38#define PICTRL_ADRS 0x06
39#define POLCTRL_ADRS 0x07
40
41/* Register Bit Definitions */
42#define RESCTL_QVGA 0x01
43#define RESCTL_VGA 0x00
44
45#define POWER1_VW_ON 0x01 /* VW Supply FET ON */
46#define POWER1_GVSS_ON 0x02 /* GVSS(-8V) Power Supply ON */
47#define POWER1_VDD_ON 0x04 /* VDD(8V),SVSS(-4V) Power Supply ON */
48
49#define POWER1_VW_OFF 0x00 /* VW Supply FET OFF */
50#define POWER1_GVSS_OFF 0x00 /* GVSS(-8V) Power Supply OFF */
51#define POWER1_VDD_OFF 0x00 /* VDD(8V),SVSS(-4V) Power Supply OFF */
52
53#define POWER0_COM_DCLK 0x01 /* COM Voltage DC Bias DAC Serial Data Clock */
54#define POWER0_COM_DOUT 0x02 /* COM Voltage DC Bias DAC Serial Data Out */
55#define POWER0_DAC_ON 0x04 /* DAC Power Supply ON */
56#define POWER0_COM_ON 0x08 /* COM Power Supply ON */
57#define POWER0_VCC5_ON 0x10 /* VCC5 Power Supply ON */
58
59#define POWER0_DAC_OFF 0x00 /* DAC Power Supply OFF */
60#define POWER0_COM_OFF 0x00 /* COM Power Supply OFF */
61#define POWER0_VCC5_OFF 0x00 /* VCC5 Power Supply OFF */
62
63#define PICTRL_INIT_STATE 0x01
64#define PICTRL_INIOFF 0x02
65#define PICTRL_POWER_DOWN 0x04
66#define PICTRL_COM_SIGNAL_OFF 0x08
67#define PICTRL_DAC_SIGNAL_OFF 0x10
68
69#define POLCTRL_SYNC_POL_FALL 0x01
70#define POLCTRL_EN_POL_FALL 0x02
71#define POLCTRL_DATA_POL_FALL 0x04
72#define POLCTRL_SYNC_ACT_H 0x08
73#define POLCTRL_EN_ACT_L 0x10
74
75#define POLCTRL_SYNC_POL_RISE 0x00
76#define POLCTRL_EN_POL_RISE 0x00
77#define POLCTRL_DATA_POL_RISE 0x00
78#define POLCTRL_SYNC_ACT_L 0x00
79#define POLCTRL_EN_ACT_H 0x00
80
81#define PHACTRL_PHASE_MANUAL 0x01
82#define DEFAULT_PHAD_QVGA (9)
83#define DEFAULT_COMADJ (125)
84
85struct corgi_lcd {
86 struct spi_device *spi_dev;
87 struct lcd_device *lcd_dev;
88 struct backlight_device *bl_dev;
89
90 int limit_mask;
91 int intensity;
92 int power;
93 int mode;
94 char buf[2];
95
96 int gpio_backlight_on;
97 int gpio_backlight_cont;
98 int gpio_backlight_cont_inverted;
99
100 void (*kick_battery)(void);
101};
102
103static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
104
105static struct corgi_lcd *the_corgi_lcd;
106static unsigned long corgibl_flags;
107#define CORGIBL_SUSPENDED 0x01
108#define CORGIBL_BATTLOW 0x02
109
110/*
111 * This is only a psuedo I2C interface. We can't use the standard kernel
112 * routines as the interface is write only. We just assume the data is acked...
113 */
114static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data)
115{
116 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data);
117 udelay(10);
118}
119
120static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data)
121{
122 lcdtg_ssp_i2c_send(lcd, data);
123 lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK);
124 lcdtg_ssp_i2c_send(lcd, data);
125}
126
127static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base)
128{
129 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);
130 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);
131 lcdtg_ssp_i2c_send(lcd, base);
132}
133
134static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base)
135{
136 lcdtg_ssp_i2c_send(lcd, base);
137 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);
138 lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);
139}
140
141static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd,
142 uint8_t base, uint8_t data)
143{
144 int i;
145 for (i = 0; i < 8; i++) {
146 if (data & 0x80)
147 lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT);
148 else
149 lcdtg_i2c_send_bit(lcd, base);
150 data <<= 1;
151 }
152}
153
154static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base)
155{
156 lcdtg_i2c_send_bit(lcd, base);
157}
158
159static void lcdtg_set_common_voltage(struct corgi_lcd *lcd,
160 uint8_t base_data, uint8_t data)
161{
162 /* Set Common Voltage to M62332FP via I2C */
163 lcdtg_i2c_send_start(lcd, base_data);
164 lcdtg_i2c_send_byte(lcd, base_data, 0x9c);
165 lcdtg_i2c_wait_ack(lcd, base_data);
166 lcdtg_i2c_send_byte(lcd, base_data, 0x00);
167 lcdtg_i2c_wait_ack(lcd, base_data);
168 lcdtg_i2c_send_byte(lcd, base_data, data);
169 lcdtg_i2c_wait_ack(lcd, base_data);
170 lcdtg_i2c_send_stop(lcd, base_data);
171}
172
173static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data)
174{
175 struct spi_message msg;
176 struct spi_transfer xfer = {
177 .len = 1,
178 .cs_change = 1,
179 .tx_buf = lcd->buf,
180 };
181
182 lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);
183 spi_message_init(&msg);
184 spi_message_add_tail(&xfer, &msg);
185
186 return spi_sync(lcd->spi_dev, &msg);
187}
188
189/* Set Phase Adjust */
190static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode)
191{
192 int adj;
193
194 switch(mode) {
195 case CORGI_LCD_MODE_VGA:
196 /* Setting for VGA */
197 adj = sharpsl_param.phadadj;
198 adj = (adj < 0) ? PHACTRL_PHASE_MANUAL :
199 PHACTRL_PHASE_MANUAL | ((adj & 0xf) << 1);
200 break;
201 case CORGI_LCD_MODE_QVGA:
202 default:
203 /* Setting for QVGA */
204 adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL;
205 break;
206 }
207
208 corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj);
209}
210
211static void corgi_lcd_power_on(struct corgi_lcd *lcd)
212{
213 int comadj;
214
215 /* Initialize Internal Logic & Port */
216 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
217 PICTRL_POWER_DOWN | PICTRL_INIOFF |
218 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF |
219 PICTRL_DAC_SIGNAL_OFF);
220
221 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
222 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF |
223 POWER0_COM_OFF | POWER0_VCC5_OFF);
224
225 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
226 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
227
228 /* VDD(+8V), SVSS(-4V) ON */
229 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
230 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
231 mdelay(3);
232
233 /* DAC ON */
234 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
235 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
236 POWER0_COM_OFF | POWER0_VCC5_OFF);
237
238 /* INIB = H, INI = L */
239 /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */
240 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
241 PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF);
242
243 /* Set Common Voltage */
244 comadj = sharpsl_param.comadj;
245 if (comadj < 0)
246 comadj = DEFAULT_COMADJ;
247
248 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |
249 POWER0_VCC5_OFF, comadj);
250
251 /* VCC5 ON, DAC ON */
252 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
253 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
254 POWER0_COM_OFF | POWER0_VCC5_ON);
255
256 /* GVSS(-8V) ON, VDD ON */
257 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
258 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
259 mdelay(2);
260
261 /* COM SIGNAL ON (PICTL[3] = L) */
262 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE);
263
264 /* COM ON, DAC ON, VCC5_ON */
265 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
266 POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
267 POWER0_COM_ON | POWER0_VCC5_ON);
268
269 /* VW ON, GVSS ON, VDD ON */
270 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
271 POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON);
272
273 /* Signals output enable */
274 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0);
275
276 /* Set Phase Adjust */
277 lcdtg_set_phadadj(lcd, lcd->mode);
278
279 /* Initialize for Input Signals from ATI */
280 corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS,
281 POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE |
282 POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L |
283 POLCTRL_EN_ACT_H);
284 udelay(1000);
285
286 switch (lcd->mode) {
287 case CORGI_LCD_MODE_VGA:
288 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);
289 break;
290 case CORGI_LCD_MODE_QVGA:
291 default:
292 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);
293 break;
294 }
295}
296
297static void corgi_lcd_power_off(struct corgi_lcd *lcd)
298{
299 /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */
300 msleep(34);
301
302 /* (1)VW OFF */
303 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
304 POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
305
306 /* (2)COM OFF */
307 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);
308 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
309 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON);
310
311 /* (3)Set Common Voltage Bias 0V */
312 lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |
313 POWER0_VCC5_ON, 0);
314
315 /* (4)GVSS OFF */
316 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
317 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
318
319 /* (5)VCC5 OFF */
320 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
321 POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF);
322
323 /* (6)Set PDWN, INIOFF, DACOFF */
324 corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,
325 PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF |
326 PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF);
327
328 /* (7)DAC OFF */
329 corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,
330 POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF);
331
332 /* (8)VDD OFF */
333 corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,
334 POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
335}
336
337static int corgi_lcd_set_mode(struct lcd_device *ld, struct fb_videomode *m)
338{
339 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev);
340 int mode = CORGI_LCD_MODE_QVGA;
341
342 if (m->xres == 640 || m->xres == 480)
343 mode = CORGI_LCD_MODE_VGA;
344
345 if (lcd->mode == mode)
346 return 0;
347
348 lcdtg_set_phadadj(lcd, mode);
349
350 switch (mode) {
351 case CORGI_LCD_MODE_VGA:
352 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);
353 break;
354 case CORGI_LCD_MODE_QVGA:
355 default:
356 corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);
357 break;
358 }
359
360 lcd->mode = mode;
361 return 0;
362}
363
364static int corgi_lcd_set_power(struct lcd_device *ld, int power)
365{
366 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev);
367
368 if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
369 corgi_lcd_power_on(lcd);
370
371 if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
372 corgi_lcd_power_off(lcd);
373
374 lcd->power = power;
375 return 0;
376}
377
378static int corgi_lcd_get_power(struct lcd_device *ld)
379{
380 struct corgi_lcd *lcd = dev_get_drvdata(&ld->dev);
381
382 return lcd->power;
383}
384
385static struct lcd_ops corgi_lcd_ops = {
386 .get_power = corgi_lcd_get_power,
387 .set_power = corgi_lcd_set_power,
388 .set_mode = corgi_lcd_set_mode,
389};
390
391static int corgi_bl_get_intensity(struct backlight_device *bd)
392{
393 struct corgi_lcd *lcd = dev_get_drvdata(&bd->dev);
394
395 return lcd->intensity;
396}
397
398static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity)
399{
400 int cont;
401
402 if (intensity > 0x10)
403 intensity += 0x10;
404
405 corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity);
406
407 /* Bit 5 via GPIO_BACKLIGHT_CONT */
408 cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted;
409
410 if (gpio_is_valid(lcd->gpio_backlight_cont))
411 gpio_set_value(lcd->gpio_backlight_cont, cont);
412
413 if (gpio_is_valid(lcd->gpio_backlight_on))
414 gpio_set_value(lcd->gpio_backlight_on, intensity);
415
416 if (lcd->kick_battery)
417 lcd->kick_battery();
418
419 lcd->intensity = intensity;
420 return 0;
421}
422
423static int corgi_bl_update_status(struct backlight_device *bd)
424{
425 struct corgi_lcd *lcd = dev_get_drvdata(&bd->dev);
426 int intensity = bd->props.brightness;
427
428 if (bd->props.power != FB_BLANK_UNBLANK)
429 intensity = 0;
430
431 if (bd->props.fb_blank != FB_BLANK_UNBLANK)
432 intensity = 0;
433
434 if (corgibl_flags & CORGIBL_SUSPENDED)
435 intensity = 0;
436 if (corgibl_flags & CORGIBL_BATTLOW)
437 intensity &= lcd->limit_mask;
438
439 return corgi_bl_set_intensity(lcd, intensity);
440}
441
442void corgibl_limit_intensity(int limit)
443{
444 if (limit)
445 corgibl_flags |= CORGIBL_BATTLOW;
446 else
447 corgibl_flags &= ~CORGIBL_BATTLOW;
448
449 backlight_update_status(the_corgi_lcd->bl_dev);
450}
451EXPORT_SYMBOL(corgibl_limit_intensity);
452
453static struct backlight_ops corgi_bl_ops = {
454 .get_brightness = corgi_bl_get_intensity,
455 .update_status = corgi_bl_update_status,
456};
457
458#ifdef CONFIG_PM
459static int corgi_lcd_suspend(struct spi_device *spi, pm_message_t state)
460{
461 struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
462
463 corgibl_flags |= CORGIBL_SUSPENDED;
464 corgi_bl_set_intensity(lcd, 0);
465 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
466 return 0;
467}
468
469static int corgi_lcd_resume(struct spi_device *spi)
470{
471 struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
472
473 corgibl_flags &= ~CORGIBL_SUSPENDED;
474 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
475 backlight_update_status(lcd->bl_dev);
476 return 0;
477}
478#else
479#define corgi_lcd_suspend NULL
480#define corgi_lcd_resume NULL
481#endif
482
483static int setup_gpio_backlight(struct corgi_lcd *lcd,
484 struct corgi_lcd_platform_data *pdata)
485{
486 struct spi_device *spi = lcd->spi_dev;
487 int err;
488
489 lcd->gpio_backlight_on = -1;
490 lcd->gpio_backlight_cont = -1;
491
492 if (gpio_is_valid(pdata->gpio_backlight_on)) {
493 err = gpio_request(pdata->gpio_backlight_on, "BL_ON");
494 if (err) {
495 dev_err(&spi->dev, "failed to request GPIO%d for "
496 "backlight_on\n", pdata->gpio_backlight_on);
497 return err;
498 }
499
500 lcd->gpio_backlight_on = pdata->gpio_backlight_on;
501 gpio_direction_output(lcd->gpio_backlight_on, 0);
502 }
503
504 if (gpio_is_valid(pdata->gpio_backlight_cont)) {
505 err = gpio_request(pdata->gpio_backlight_cont, "BL_CONT");
506 if (err) {
507 dev_err(&spi->dev, "failed to request GPIO%d for "
508 "backlight_cont\n", pdata->gpio_backlight_cont);
509 goto err_free_backlight_on;
510 }
511
512 lcd->gpio_backlight_cont = pdata->gpio_backlight_cont;
513
514 /* spitz and akita use both GPIOs for backlight, and
515 * have inverted polarity of GPIO_BACKLIGHT_CONT
516 */
517 if (gpio_is_valid(lcd->gpio_backlight_on)) {
518 lcd->gpio_backlight_cont_inverted = 1;
519 gpio_direction_output(lcd->gpio_backlight_cont, 1);
520 } else {
521 lcd->gpio_backlight_cont_inverted = 0;
522 gpio_direction_output(lcd->gpio_backlight_cont, 0);
523 }
524 }
525 return 0;
526
527err_free_backlight_on:
528 if (gpio_is_valid(lcd->gpio_backlight_on))
529 gpio_free(lcd->gpio_backlight_on);
530 return err;
531}
532
533static int __devinit corgi_lcd_probe(struct spi_device *spi)
534{
535 struct corgi_lcd_platform_data *pdata = spi->dev.platform_data;
536 struct corgi_lcd *lcd;
537 int ret = 0;
538
539 if (pdata == NULL) {
540 dev_err(&spi->dev, "platform data not available\n");
541 return -EINVAL;
542 }
543
544 lcd = kzalloc(sizeof(struct corgi_lcd), GFP_KERNEL);
545 if (!lcd) {
546 dev_err(&spi->dev, "failed to allocate memory\n");
547 return -ENOMEM;
548 }
549
550 lcd->spi_dev = spi;
551
552 lcd->lcd_dev = lcd_device_register("corgi_lcd", &spi->dev,
553 lcd, &corgi_lcd_ops);
554 if (IS_ERR(lcd->lcd_dev)) {
555 ret = PTR_ERR(lcd->lcd_dev);
556 goto err_free_lcd;
557 }
558 lcd->power = FB_BLANK_POWERDOWN;
559 lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;
560
561 lcd->bl_dev = backlight_device_register("corgi_bl", &spi->dev,
562 lcd, &corgi_bl_ops);
563 if (IS_ERR(lcd->bl_dev)) {
564 ret = PTR_ERR(lcd->bl_dev);
565 goto err_unregister_lcd;
566 }
567 lcd->bl_dev->props.max_brightness = pdata->max_intensity;
568 lcd->bl_dev->props.brightness = pdata->default_intensity;
569 lcd->bl_dev->props.power = FB_BLANK_UNBLANK;
570
571 ret = setup_gpio_backlight(lcd, pdata);
572 if (ret)
573 goto err_unregister_bl;
574
575 lcd->kick_battery = pdata->kick_battery;
576
577 dev_set_drvdata(&spi->dev, lcd);
578 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
579 backlight_update_status(lcd->bl_dev);
580
581 lcd->limit_mask = pdata->limit_mask;
582 the_corgi_lcd = lcd;
583 return 0;
584
585err_unregister_bl:
586 backlight_device_unregister(lcd->bl_dev);
587err_unregister_lcd:
588 lcd_device_unregister(lcd->lcd_dev);
589err_free_lcd:
590 kfree(lcd);
591 return ret;
592}
593
594static int __devexit corgi_lcd_remove(struct spi_device *spi)
595{
596 struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
597
598 lcd->bl_dev->props.power = FB_BLANK_UNBLANK;
599 lcd->bl_dev->props.brightness = 0;
600 backlight_update_status(lcd->bl_dev);
601 backlight_device_unregister(lcd->bl_dev);
602
603 if (gpio_is_valid(lcd->gpio_backlight_on))
604 gpio_free(lcd->gpio_backlight_on);
605
606 if (gpio_is_valid(lcd->gpio_backlight_cont))
607 gpio_free(lcd->gpio_backlight_cont);
608
609 corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
610 lcd_device_unregister(lcd->lcd_dev);
611 kfree(lcd);
612
613 return 0;
614}
615
616static struct spi_driver corgi_lcd_driver = {
617 .driver = {
618 .name = "corgi-lcd",
619 .owner = THIS_MODULE,
620 },
621 .probe = corgi_lcd_probe,
622 .remove = __devexit_p(corgi_lcd_remove),
623 .suspend = corgi_lcd_suspend,
624 .resume = corgi_lcd_resume,
625};
626
627static int __init corgi_lcd_init(void)
628{
629 return spi_register_driver(&corgi_lcd_driver);
630}
631module_init(corgi_lcd_init);
632
633static void __exit corgi_lcd_exit(void)
634{
635 spi_unregister_driver(&corgi_lcd_driver);
636}
637module_exit(corgi_lcd_exit);
638
639MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00");
640MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
641MODULE_LICENSE("GPL");
diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index b15b2b84a6f7..8e1731d3b228 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -27,14 +27,26 @@ static int fb_notifier_callback(struct notifier_block *self,
27 struct fb_event *evdata = data; 27 struct fb_event *evdata = data;
28 28
29 /* If we aren't interested in this event, skip it immediately ... */ 29 /* If we aren't interested in this event, skip it immediately ... */
30 if (event != FB_EVENT_BLANK) 30 switch (event) {
31 case FB_EVENT_BLANK:
32 case FB_EVENT_MODE_CHANGE:
33 case FB_EVENT_MODE_CHANGE_ALL:
34 break;
35 default:
31 return 0; 36 return 0;
37 }
32 38
33 ld = container_of(self, struct lcd_device, fb_notif); 39 ld = container_of(self, struct lcd_device, fb_notif);
40 if (!ld->ops)
41 return 0;
42
34 mutex_lock(&ld->ops_lock); 43 mutex_lock(&ld->ops_lock);
35 if (ld->ops) 44 if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) {
36 if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) 45 if (event == FB_EVENT_BLANK)
37 ld->ops->set_power(ld, *(int *)evdata->data); 46 ld->ops->set_power(ld, *(int *)evdata->data);
47 else
48 ld->ops->set_mode(ld, evdata->data);
49 }
38 mutex_unlock(&ld->ops_lock); 50 mutex_unlock(&ld->ops_lock);
39 return 0; 51 return 0;
40} 52}
diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
new file mode 100644
index 000000000000..8427669162ea
--- /dev/null
+++ b/drivers/video/backlight/tdo24m.c
@@ -0,0 +1,396 @@
1/*
2 * tdo24m - SPI-based drivers for Toppoly TDO24M series LCD panels
3 *
4 * Copyright (C) 2008 Marvell International Ltd.
5 * Eric Miao <eric.miao@marvell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * publishhed by the Free Software Foundation.
10 */
11
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/device.h>
16#include <linux/spi/spi.h>
17#include <linux/fb.h>
18#include <linux/lcd.h>
19
20#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
21
22#define TDO24M_SPI_BUFF_SIZE (4)
23#define MODE_QVGA 0
24#define MODE_VGA 1
25
26struct tdo24m {
27 struct spi_device *spi_dev;
28 struct lcd_device *lcd_dev;
29
30 struct spi_message msg;
31 struct spi_transfer xfer;
32 uint8_t *buf;
33
34 int power;
35 int mode;
36};
37
38/* use bit 30, 31 as the indicator of command parameter number */
39#define CMD0(x) ((0 << 30) | (x))
40#define CMD1(x, x1) ((1 << 30) | ((x) << 9) | 0x100 | (x1))
41#define CMD2(x, x1, x2) ((2 << 30) | ((x) << 18) | 0x20000 |\
42 ((x1) << 9) | 0x100 | (x2))
43#define CMD_NULL (-1)
44
45static uint32_t lcd_panel_reset[] = {
46 CMD0(0x1), /* reset */
47 CMD0(0x0), /* nop */
48 CMD0(0x0), /* nop */
49 CMD0(0x0), /* nop */
50 CMD_NULL,
51};
52
53static uint32_t lcd_panel_on[] = {
54 CMD0(0x29), /* Display ON */
55 CMD2(0xB8, 0xFF, 0xF9), /* Output Control */
56 CMD0(0x11), /* Sleep out */
57 CMD1(0xB0, 0x16), /* Wake */
58 CMD_NULL,
59};
60
61static uint32_t lcd_panel_off[] = {
62 CMD0(0x28), /* Display OFF */
63 CMD2(0xB8, 0x80, 0x02), /* Output Control */
64 CMD0(0x10), /* Sleep in */
65 CMD1(0xB0, 0x00), /* Deep stand by in */
66 CMD_NULL,
67};
68
69static uint32_t lcd_vga_pass_through[] = {
70 CMD1(0xB0, 0x16),
71 CMD1(0xBC, 0x80),
72 CMD1(0xE1, 0x00),
73 CMD1(0x36, 0x50),
74 CMD1(0x3B, 0x00),
75 CMD_NULL,
76};
77
78static uint32_t lcd_qvga_pass_through[] = {
79 CMD1(0xB0, 0x16),
80 CMD1(0xBC, 0x81),
81 CMD1(0xE1, 0x00),
82 CMD1(0x36, 0x50),
83 CMD1(0x3B, 0x22),
84 CMD_NULL,
85};
86
87static uint32_t lcd_vga_transfer[] = {
88 CMD1(0xcf, 0x02), /* Blanking period control (1) */
89 CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */
90 CMD1(0xd1, 0x01), /* CKV timing control on/off */
91 CMD2(0xd2, 0x14, 0x00), /* CKV 1,2 timing control */
92 CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */
93 CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */
94 CMD1(0xd5, 0x14), /* ASW timing control (2) */
95 CMD0(0x21), /* Invert for normally black display */
96 CMD0(0x29), /* Display on */
97 CMD_NULL,
98};
99
100static uint32_t lcd_qvga_transfer[] = {
101 CMD1(0xd6, 0x02), /* Blanking period control (1) */
102 CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */
103 CMD1(0xd8, 0x01), /* CKV timing control on/off */
104 CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */
105 CMD2(0xde, 0x05, 0x0a), /* OEV timing control */
106 CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */
107 CMD1(0xe0, 0x0a), /* ASW timing control (2) */
108 CMD0(0x21), /* Invert for normally black display */
109 CMD0(0x29), /* Display on */
110 CMD_NULL,
111};
112
113static uint32_t lcd_panel_config[] = {
114 CMD2(0xb8, 0xff, 0xf9), /* Output control */
115 CMD0(0x11), /* sleep out */
116 CMD1(0xba, 0x01), /* Display mode (1) */
117 CMD1(0xbb, 0x00), /* Display mode (2) */
118 CMD1(0x3a, 0x60), /* Display mode 18-bit RGB */
119 CMD1(0xbf, 0x10), /* Drive system change control */
120 CMD1(0xb1, 0x56), /* Booster operation setup */
121 CMD1(0xb2, 0x33), /* Booster mode setup */
122 CMD1(0xb3, 0x11), /* Booster frequency setup */
123 CMD1(0xb4, 0x02), /* Op amp/system clock */
124 CMD1(0xb5, 0x35), /* VCS voltage */
125 CMD1(0xb6, 0x40), /* VCOM voltage */
126 CMD1(0xb7, 0x03), /* External display signal */
127 CMD1(0xbd, 0x00), /* ASW slew rate */
128 CMD1(0xbe, 0x00), /* Dummy data for QuadData operation */
129 CMD1(0xc0, 0x11), /* Sleep out FR count (A) */
130 CMD1(0xc1, 0x11), /* Sleep out FR count (B) */
131 CMD1(0xc2, 0x11), /* Sleep out FR count (C) */
132 CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */
133 CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */
134 CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */
135 CMD1(0xc6, 0xc0), /* Sleep out FR count (G) */
136 CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */
137 CMD1(0xc8, 0x44), /* Gamma 1 fine tuning (2) */
138 CMD1(0xc9, 0x33), /* Gamma 1 inclination adjustment */
139 CMD1(0xca, 0x00), /* Gamma 1 blue offset adjustment */
140 CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */
141 CMD_NULL,
142};
143
144static int tdo24m_writes(struct tdo24m *lcd, uint32_t *array)
145{
146 struct spi_transfer *x = &lcd->xfer;
147 uint32_t data, *p = array;
148 int nparams, err = 0;
149
150 for (; *p != CMD_NULL; p++) {
151
152 nparams = (*p >> 30) & 0x3;
153
154 data = *p << (7 - nparams);
155 switch (nparams) {
156 case 0:
157 lcd->buf[0] = (data >> 8) & 0xff;
158 lcd->buf[1] = data & 0xff;
159 break;
160 case 1:
161 lcd->buf[0] = (data >> 16) & 0xff;
162 lcd->buf[1] = (data >> 8) & 0xff;
163 lcd->buf[2] = data & 0xff;
164 break;
165 case 2:
166 lcd->buf[0] = (data >> 24) & 0xff;
167 lcd->buf[1] = (data >> 16) & 0xff;
168 lcd->buf[2] = (data >> 8) & 0xff;
169 lcd->buf[3] = data & 0xff;
170 break;
171 default:
172 continue;
173 }
174 x->len = nparams + 2;
175 err = spi_sync(lcd->spi_dev, &lcd->msg);
176 if (err)
177 break;
178 }
179
180 return err;
181}
182
183static int tdo24m_adj_mode(struct tdo24m *lcd, int mode)
184{
185 switch (mode) {
186 case MODE_VGA:
187 tdo24m_writes(lcd, lcd_vga_pass_through);
188 tdo24m_writes(lcd, lcd_panel_config);
189 tdo24m_writes(lcd, lcd_vga_transfer);
190 break;
191 case MODE_QVGA:
192 tdo24m_writes(lcd, lcd_qvga_pass_through);
193 tdo24m_writes(lcd, lcd_panel_config);
194 tdo24m_writes(lcd, lcd_qvga_transfer);
195 break;
196 default:
197 return -EINVAL;
198 }
199
200 lcd->mode = mode;
201 return 0;
202}
203
204static int tdo24m_power_on(struct tdo24m *lcd)
205{
206 int err;
207
208 err = tdo24m_writes(lcd, lcd_panel_on);
209 if (err)
210 goto out;
211
212 err = tdo24m_writes(lcd, lcd_panel_reset);
213 if (err)
214 goto out;
215
216 err = tdo24m_adj_mode(lcd, lcd->mode);
217out:
218 return err;
219}
220
221static int tdo24m_power_off(struct tdo24m *lcd)
222{
223 return tdo24m_writes(lcd, lcd_panel_off);
224}
225
226static int tdo24m_power(struct tdo24m *lcd, int power)
227{
228 int ret = 0;
229
230 if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
231 ret = tdo24m_power_on(lcd);
232 else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
233 ret = tdo24m_power_off(lcd);
234
235 if (!ret)
236 lcd->power = power;
237
238 return ret;
239}
240
241
242static int tdo24m_set_power(struct lcd_device *ld, int power)
243{
244 struct tdo24m *lcd = lcd_get_data(ld);
245 return tdo24m_power(lcd, power);
246}
247
248static int tdo24m_get_power(struct lcd_device *ld)
249{
250 struct tdo24m *lcd = lcd_get_data(ld);
251 return lcd->power;
252}
253
254static int tdo24m_set_mode(struct lcd_device *ld, struct fb_videomode *m)
255{
256 struct tdo24m *lcd = lcd_get_data(ld);
257 int mode = MODE_QVGA;
258
259 if (m->xres == 640 || m->xres == 480)
260 mode = MODE_VGA;
261
262 if (lcd->mode == mode)
263 return 0;
264
265 return tdo24m_adj_mode(lcd, mode);
266}
267
268static struct lcd_ops tdo24m_ops = {
269 .get_power = tdo24m_get_power,
270 .set_power = tdo24m_set_power,
271 .set_mode = tdo24m_set_mode,
272};
273
274static int __devinit tdo24m_probe(struct spi_device *spi)
275{
276 struct tdo24m *lcd;
277 struct spi_message *m;
278 struct spi_transfer *x;
279 int err;
280
281 spi->bits_per_word = 8;
282 spi->mode = SPI_MODE_3;
283 err = spi_setup(spi);
284 if (err)
285 return err;
286
287 lcd = kzalloc(sizeof(struct tdo24m), GFP_KERNEL);
288 if (!lcd)
289 return -ENOMEM;
290
291 lcd->spi_dev = spi;
292 lcd->power = FB_BLANK_POWERDOWN;
293 lcd->mode = MODE_VGA; /* default to VGA */
294
295 lcd->buf = kmalloc(TDO24M_SPI_BUFF_SIZE, sizeof(GFP_KERNEL));
296 if (lcd->buf == NULL) {
297 kfree(lcd);
298 return -ENOMEM;
299 }
300
301 m = &lcd->msg;
302 x = &lcd->xfer;
303
304 spi_message_init(m);
305
306 x->tx_buf = &lcd->buf[0];
307 spi_message_add_tail(x, m);
308
309 lcd->lcd_dev = lcd_device_register("tdo24m", &spi->dev,
310 lcd, &tdo24m_ops);
311 if (IS_ERR(lcd->lcd_dev)) {
312 err = PTR_ERR(lcd->lcd_dev);
313 goto out_free;
314 }
315
316 dev_set_drvdata(&spi->dev, lcd);
317 err = tdo24m_power(lcd, FB_BLANK_UNBLANK);
318 if (err)
319 goto out_unregister;
320
321 return 0;
322
323out_unregister:
324 lcd_device_unregister(lcd->lcd_dev);
325out_free:
326 kfree(lcd->buf);
327 kfree(lcd);
328 return err;
329}
330
331static int __devexit tdo24m_remove(struct spi_device *spi)
332{
333 struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
334
335 tdo24m_power(lcd, FB_BLANK_POWERDOWN);
336 lcd_device_unregister(lcd->lcd_dev);
337 kfree(lcd->buf);
338 kfree(lcd);
339
340 return 0;
341}
342
343#ifdef CONFIG_PM
344static int tdo24m_suspend(struct spi_device *spi, pm_message_t state)
345{
346 struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
347
348 return tdo24m_power(lcd, FB_BLANK_POWERDOWN);
349}
350
351static int tdo24m_resume(struct spi_device *spi)
352{
353 struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
354
355 return tdo24m_power(lcd, FB_BLANK_UNBLANK);
356}
357#else
358#define tdo24m_suspend NULL
359#define tdo24m_resume NULL
360#endif
361
362/* Power down all displays on reboot, poweroff or halt */
363static void tdo24m_shutdown(struct spi_device *spi)
364{
365 struct tdo24m *lcd = dev_get_drvdata(&spi->dev);
366
367 tdo24m_power(lcd, FB_BLANK_POWERDOWN);
368}
369
370static struct spi_driver tdo24m_driver = {
371 .driver = {
372 .name = "tdo24m",
373 .owner = THIS_MODULE,
374 },
375 .probe = tdo24m_probe,
376 .remove = __devexit_p(tdo24m_remove),
377 .shutdown = tdo24m_shutdown,
378 .suspend = tdo24m_suspend,
379 .resume = tdo24m_resume,
380};
381
382static int __init tdo24m_init(void)
383{
384 return spi_register_driver(&tdo24m_driver);
385}
386module_init(tdo24m_init);
387
388static void __exit tdo24m_exit(void)
389{
390 spi_unregister_driver(&tdo24m_driver);
391}
392module_exit(tdo24m_exit);
393
394MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>");
395MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel");
396MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 01:40:22 -0500