3  *  LCD/Backlight Driver for Sharp Zaurus Handhelds (various models)
10  *	Converted to SPI device based LCD/Backlight device driver
20 #include <linux/lcd.h>
99 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
110 static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data)  in lcdtg_ssp_i2c_send()  argument
112 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data);  in lcdtg_ssp_i2c_send()
116 static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data)  in lcdtg_i2c_send_bit()  argument
118 	lcdtg_ssp_i2c_send(lcd, data);  in lcdtg_i2c_send_bit()
119 	lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK);  in lcdtg_i2c_send_bit()
120 	lcdtg_ssp_i2c_send(lcd, data);  in lcdtg_i2c_send_bit()
123 static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_send_start()  argument
125 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);  in lcdtg_i2c_send_start()
126 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);  in lcdtg_i2c_send_start()
127 	lcdtg_ssp_i2c_send(lcd, base);  in lcdtg_i2c_send_start()
130 static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_send_stop()  argument
132 	lcdtg_ssp_i2c_send(lcd, base);  in lcdtg_i2c_send_stop()
133 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);  in lcdtg_i2c_send_stop()
134 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);  in lcdtg_i2c_send_stop()
137 static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd,  in lcdtg_i2c_send_byte()  argument
144 			lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT);  in lcdtg_i2c_send_byte()
146 			lcdtg_i2c_send_bit(lcd, base);  in lcdtg_i2c_send_byte()
151 static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_wait_ack()  argument
153 	lcdtg_i2c_send_bit(lcd, base);  in lcdtg_i2c_wait_ack()
156 static void lcdtg_set_common_voltage(struct corgi_lcd *lcd,  in lcdtg_set_common_voltage()  argument
160 	lcdtg_i2c_send_start(lcd, base_data);  in lcdtg_set_common_voltage()
161 	lcdtg_i2c_send_byte(lcd, base_data, 0x9c);  in lcdtg_set_common_voltage()
162 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
163 	lcdtg_i2c_send_byte(lcd, base_data, 0x00);  in lcdtg_set_common_voltage()
164 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
165 	lcdtg_i2c_send_byte(lcd, base_data, data);  in lcdtg_set_common_voltage()
166 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
167 	lcdtg_i2c_send_stop(lcd, base_data);  in lcdtg_set_common_voltage()
170 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data)  in corgi_ssp_lcdtg_send()  argument
176 		.tx_buf		= lcd->buf,  in corgi_ssp_lcdtg_send()
179 	lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);  in corgi_ssp_lcdtg_send()
183 	return spi_sync(lcd->spi_dev, &msg);  in corgi_ssp_lcdtg_send()
187 static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode)  in lcdtg_set_phadadj()  argument
205 	corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj);  in lcdtg_set_phadadj()
208 static void corgi_lcd_power_on(struct corgi_lcd *lcd)  in corgi_lcd_power_on()  argument
213 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_on()
218 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
222 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
226 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
231 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
237 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_on()
245 	lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |  in corgi_lcd_power_on()
249 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
254 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
259 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE);  in corgi_lcd_power_on()
262 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
267 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
271 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0);  in corgi_lcd_power_on()
274 	lcdtg_set_phadadj(lcd, lcd->mode);  in corgi_lcd_power_on()
277 	corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS,  in corgi_lcd_power_on()
283 	switch (lcd->mode) {  in corgi_lcd_power_on()
285 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);  in corgi_lcd_power_on()
289 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);  in corgi_lcd_power_on()
294 static void corgi_lcd_power_off(struct corgi_lcd *lcd)  in corgi_lcd_power_off()  argument
300 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
304 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);  in corgi_lcd_power_off()
305 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
309 	lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |  in corgi_lcd_power_off()
313 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
317 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
321 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_off()
326 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
330 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
336 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_set_mode()  local
342 	if (lcd->mode == mode)  in corgi_lcd_set_mode()
345 	lcdtg_set_phadadj(lcd, mode);  in corgi_lcd_set_mode()
349 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);  in corgi_lcd_set_mode()
353 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);  in corgi_lcd_set_mode()
357 	lcd->mode = mode;  in corgi_lcd_set_mode()
363 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_set_power()  local
365 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))  in corgi_lcd_set_power()
366 		corgi_lcd_power_on(lcd);  in corgi_lcd_set_power()
368 	if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))  in corgi_lcd_set_power()
369 		corgi_lcd_power_off(lcd);  in corgi_lcd_set_power()
371 	lcd->power = power;  in corgi_lcd_set_power()
377 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_get_power()  local
379 	return lcd->power;  in corgi_lcd_get_power()
390 	struct corgi_lcd *lcd = bl_get_data(bd);  in corgi_bl_get_intensity()  local
392 	return lcd->intensity;  in corgi_bl_get_intensity()
395 static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity)  in corgi_bl_set_intensity()  argument
402 	corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity);  in corgi_bl_set_intensity()
407 	if (lcd->backlight_cont)  in corgi_bl_set_intensity()
408 		gpiod_set_value_cansleep(lcd->backlight_cont, cont);  in corgi_bl_set_intensity()
410 	if (lcd->backlight_on)  in corgi_bl_set_intensity()
411 		gpiod_set_value_cansleep(lcd->backlight_on, intensity);  in corgi_bl_set_intensity()
413 	if (lcd->kick_battery)  in corgi_bl_set_intensity()
414 		lcd->kick_battery();  in corgi_bl_set_intensity()
416 	lcd->intensity = intensity;  in corgi_bl_set_intensity()
422 	struct corgi_lcd *lcd = bl_get_data(bd);  in corgi_bl_update_status()  local
428 	if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask)  in corgi_bl_update_status()
429 		intensity = lcd->limit_mask;  in corgi_bl_update_status()
431 	return corgi_bl_set_intensity(lcd, intensity);  in corgi_bl_update_status()
453 	struct corgi_lcd *lcd = dev_get_drvdata(dev);  in corgi_lcd_suspend()  local
456 	corgi_bl_set_intensity(lcd, 0);  in corgi_lcd_suspend()
457 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);  in corgi_lcd_suspend()
463 	struct corgi_lcd *lcd = dev_get_drvdata(dev);  in corgi_lcd_resume()  local
466 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);  in corgi_lcd_resume()
467 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_resume()
474 static int setup_gpio_backlight(struct corgi_lcd *lcd,  in setup_gpio_backlight()  argument
477 	struct spi_device *spi = lcd->spi_dev;  in setup_gpio_backlight()
479 	lcd->backlight_on = devm_gpiod_get_optional(&spi->dev,  in setup_gpio_backlight()
481 	if (IS_ERR(lcd->backlight_on))  in setup_gpio_backlight()
482 		return PTR_ERR(lcd->backlight_on);  in setup_gpio_backlight()
484 	lcd->backlight_cont = devm_gpiod_get_optional(&spi->dev, "BL_CONT",  in setup_gpio_backlight()
486 	if (IS_ERR(lcd->backlight_cont))  in setup_gpio_backlight()
487 		return PTR_ERR(lcd->backlight_cont);  in setup_gpio_backlight()
496 	struct corgi_lcd *lcd;  in corgi_lcd_probe()  local
504 	lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL);  in corgi_lcd_probe()
505 	if (!lcd)  in corgi_lcd_probe()
508 	lcd->spi_dev = spi;  in corgi_lcd_probe()
510 	lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd",  in corgi_lcd_probe()
511 						&spi->dev, lcd, &corgi_lcd_ops);  in corgi_lcd_probe()
512 	if (IS_ERR(lcd->lcd_dev))  in corgi_lcd_probe()
513 		return PTR_ERR(lcd->lcd_dev);  in corgi_lcd_probe()
515 	lcd->power = FB_BLANK_POWERDOWN;  in corgi_lcd_probe()
516 	lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;  in corgi_lcd_probe()
521 	lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl",  in corgi_lcd_probe()
522 						&spi->dev, lcd, &corgi_bl_ops,  in corgi_lcd_probe()
524 	if (IS_ERR(lcd->bl_dev))  in corgi_lcd_probe()
525 		return PTR_ERR(lcd->bl_dev);  in corgi_lcd_probe()
527 	lcd->bl_dev->props.brightness = pdata->default_intensity;  in corgi_lcd_probe()
528 	lcd->bl_dev->props.power = FB_BLANK_UNBLANK;  in corgi_lcd_probe()
530 	ret = setup_gpio_backlight(lcd, pdata);  in corgi_lcd_probe()
534 	lcd->kick_battery = pdata->kick_battery;  in corgi_lcd_probe()
536 	spi_set_drvdata(spi, lcd);  in corgi_lcd_probe()
537 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);  in corgi_lcd_probe()
538 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_probe()
540 	lcd->limit_mask = pdata->limit_mask;  in corgi_lcd_probe()
541 	the_corgi_lcd = lcd;  in corgi_lcd_probe()
547 	struct corgi_lcd *lcd = spi_get_drvdata(spi);  in corgi_lcd_remove()  local
549 	lcd->bl_dev->props.power = FB_BLANK_UNBLANK;  in corgi_lcd_remove()
550 	lcd->bl_dev->props.brightness = 0;  in corgi_lcd_remove()
551 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_remove()
552 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);  in corgi_lcd_remove()
557 		.name	= "corgi-lcd",
566 MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00");
569 MODULE_ALIAS("spi:corgi-lcd");