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>
100 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
111 static void lcdtg_ssp_i2c_send(struct corgi_lcd *lcd, uint8_t data)  in lcdtg_ssp_i2c_send()  argument
113 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS, data);  in lcdtg_ssp_i2c_send()
117 static void lcdtg_i2c_send_bit(struct corgi_lcd *lcd, uint8_t data)  in lcdtg_i2c_send_bit()  argument
119 	lcdtg_ssp_i2c_send(lcd, data);  in lcdtg_i2c_send_bit()
120 	lcdtg_ssp_i2c_send(lcd, data | POWER0_COM_DCLK);  in lcdtg_i2c_send_bit()
121 	lcdtg_ssp_i2c_send(lcd, data);  in lcdtg_i2c_send_bit()
124 static void lcdtg_i2c_send_start(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_send_start()  argument
126 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);  in lcdtg_i2c_send_start()
127 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);  in lcdtg_i2c_send_start()
128 	lcdtg_ssp_i2c_send(lcd, base);  in lcdtg_i2c_send_start()
131 static void lcdtg_i2c_send_stop(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_send_stop()  argument
133 	lcdtg_ssp_i2c_send(lcd, base);  in lcdtg_i2c_send_stop()
134 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK);  in lcdtg_i2c_send_stop()
135 	lcdtg_ssp_i2c_send(lcd, base | POWER0_COM_DCLK | POWER0_COM_DOUT);  in lcdtg_i2c_send_stop()
138 static void lcdtg_i2c_send_byte(struct corgi_lcd *lcd,  in lcdtg_i2c_send_byte()  argument
145 			lcdtg_i2c_send_bit(lcd, base | POWER0_COM_DOUT);  in lcdtg_i2c_send_byte()
147 			lcdtg_i2c_send_bit(lcd, base);  in lcdtg_i2c_send_byte()
152 static void lcdtg_i2c_wait_ack(struct corgi_lcd *lcd, uint8_t base)  in lcdtg_i2c_wait_ack()  argument
154 	lcdtg_i2c_send_bit(lcd, base);  in lcdtg_i2c_wait_ack()
157 static void lcdtg_set_common_voltage(struct corgi_lcd *lcd,  in lcdtg_set_common_voltage()  argument
161 	lcdtg_i2c_send_start(lcd, base_data);  in lcdtg_set_common_voltage()
162 	lcdtg_i2c_send_byte(lcd, base_data, 0x9c);  in lcdtg_set_common_voltage()
163 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
164 	lcdtg_i2c_send_byte(lcd, base_data, 0x00);  in lcdtg_set_common_voltage()
165 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
166 	lcdtg_i2c_send_byte(lcd, base_data, data);  in lcdtg_set_common_voltage()
167 	lcdtg_i2c_wait_ack(lcd, base_data);  in lcdtg_set_common_voltage()
168 	lcdtg_i2c_send_stop(lcd, base_data);  in lcdtg_set_common_voltage()
171 static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int adrs, uint8_t data)  in corgi_ssp_lcdtg_send()  argument
177 		.tx_buf		= lcd->buf,  in corgi_ssp_lcdtg_send()
180 	lcd->buf[0] = ((adrs & 0x07) << 5) | (data & 0x1f);  in corgi_ssp_lcdtg_send()
184 	return spi_sync(lcd->spi_dev, &msg);  in corgi_ssp_lcdtg_send()
188 static void lcdtg_set_phadadj(struct corgi_lcd *lcd, int mode)  in lcdtg_set_phadadj()  argument
206 	corgi_ssp_lcdtg_send(lcd, PHACTRL_ADRS, adj);  in lcdtg_set_phadadj()
209 static void corgi_lcd_power_on(struct corgi_lcd *lcd)  in corgi_lcd_power_on()  argument
214 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_on()
219 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
223 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
227 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
232 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
238 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_on()
246 	lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |  in corgi_lcd_power_on()
250 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
255 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
260 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_INIT_STATE);  in corgi_lcd_power_on()
263 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_on()
268 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_on()
272 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, 0);  in corgi_lcd_power_on()
275 	lcdtg_set_phadadj(lcd, lcd->mode);  in corgi_lcd_power_on()
278 	corgi_ssp_lcdtg_send(lcd, POLCTRL_ADRS,  in corgi_lcd_power_on()
284 	switch (lcd->mode) {  in corgi_lcd_power_on()
286 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);  in corgi_lcd_power_on()
290 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);  in corgi_lcd_power_on()
295 static void corgi_lcd_power_off(struct corgi_lcd *lcd)  in corgi_lcd_power_off()  argument
301 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
305 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);  in corgi_lcd_power_off()
306 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
310 	lcdtg_set_common_voltage(lcd, POWER0_DAC_ON | POWER0_COM_OFF |  in corgi_lcd_power_off()
314 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
318 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
322 	corgi_ssp_lcdtg_send(lcd, PICTRL_ADRS,  in corgi_lcd_power_off()
327 	corgi_ssp_lcdtg_send(lcd, POWERREG0_ADRS,  in corgi_lcd_power_off()
331 	corgi_ssp_lcdtg_send(lcd, POWERREG1_ADRS,  in corgi_lcd_power_off()
337 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_set_mode()  local
343 	if (lcd->mode == mode)  in corgi_lcd_set_mode()
346 	lcdtg_set_phadadj(lcd, mode);  in corgi_lcd_set_mode()
350 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_VGA);  in corgi_lcd_set_mode()
354 		corgi_ssp_lcdtg_send(lcd, RESCTL_ADRS, RESCTL_QVGA);  in corgi_lcd_set_mode()
358 	lcd->mode = mode;  in corgi_lcd_set_mode()
364 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_set_power()  local
366 	if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))  in corgi_lcd_set_power()
367 		corgi_lcd_power_on(lcd);  in corgi_lcd_set_power()
369 	if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))  in corgi_lcd_set_power()
370 		corgi_lcd_power_off(lcd);  in corgi_lcd_set_power()
372 	lcd->power = power;  in corgi_lcd_set_power()
378 	struct corgi_lcd *lcd = lcd_get_data(ld);  in corgi_lcd_get_power()  local
380 	return lcd->power;  in corgi_lcd_get_power()
391 	struct corgi_lcd *lcd = bl_get_data(bd);  in corgi_bl_get_intensity()  local
393 	return lcd->intensity;  in corgi_bl_get_intensity()
396 static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity)  in corgi_bl_set_intensity()  argument
403 	corgi_ssp_lcdtg_send(lcd, DUTYCTRL_ADRS, intensity);  in corgi_bl_set_intensity()
406 	cont = !!(intensity & 0x20) ^ lcd->gpio_backlight_cont_inverted;  in corgi_bl_set_intensity()
408 	if (gpio_is_valid(lcd->gpio_backlight_cont))  in corgi_bl_set_intensity()
409 		gpio_set_value_cansleep(lcd->gpio_backlight_cont, cont);  in corgi_bl_set_intensity()
411 	if (gpio_is_valid(lcd->gpio_backlight_on))  in corgi_bl_set_intensity()
412 		gpio_set_value_cansleep(lcd->gpio_backlight_on, intensity);  in corgi_bl_set_intensity()
414 	if (lcd->kick_battery)  in corgi_bl_set_intensity()
415 		lcd->kick_battery();  in corgi_bl_set_intensity()
417 	lcd->intensity = intensity;  in corgi_bl_set_intensity()
423 	struct corgi_lcd *lcd = bl_get_data(bd);  in corgi_bl_update_status()  local
435 	if ((corgibl_flags & CORGIBL_BATTLOW) && intensity > lcd->limit_mask)  in corgi_bl_update_status()
436 		intensity = lcd->limit_mask;  in corgi_bl_update_status()
438 	return corgi_bl_set_intensity(lcd, intensity);  in corgi_bl_update_status()
460 	struct corgi_lcd *lcd = dev_get_drvdata(dev);  in corgi_lcd_suspend()  local
463 	corgi_bl_set_intensity(lcd, 0);  in corgi_lcd_suspend()
464 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);  in corgi_lcd_suspend()
470 	struct corgi_lcd *lcd = dev_get_drvdata(dev);  in corgi_lcd_resume()  local
473 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);  in corgi_lcd_resume()
474 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_resume()
481 static int setup_gpio_backlight(struct corgi_lcd *lcd,  in setup_gpio_backlight()  argument
484 	struct spi_device *spi = lcd->spi_dev;  in setup_gpio_backlight()
487 	lcd->gpio_backlight_on = -1;  in setup_gpio_backlight()
488 	lcd->gpio_backlight_cont = -1;  in setup_gpio_backlight()
500 		lcd->gpio_backlight_on = pdata->gpio_backlight_on;  in setup_gpio_backlight()
501 		gpio_direction_output(lcd->gpio_backlight_on, 0);  in setup_gpio_backlight()
514 		lcd->gpio_backlight_cont = pdata->gpio_backlight_cont;  in setup_gpio_backlight()
519 		if (gpio_is_valid(lcd->gpio_backlight_on)) {  in setup_gpio_backlight()
520 			lcd->gpio_backlight_cont_inverted = 1;  in setup_gpio_backlight()
521 			gpio_direction_output(lcd->gpio_backlight_cont, 1);  in setup_gpio_backlight()
523 			lcd->gpio_backlight_cont_inverted = 0;  in setup_gpio_backlight()
524 			gpio_direction_output(lcd->gpio_backlight_cont, 0);  in setup_gpio_backlight()
534 	struct corgi_lcd *lcd;  in corgi_lcd_probe()  local
542 	lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL);  in corgi_lcd_probe()
543 	if (!lcd)  in corgi_lcd_probe()
546 	lcd->spi_dev = spi;  in corgi_lcd_probe()
548 	lcd->lcd_dev = devm_lcd_device_register(&spi->dev, "corgi_lcd",  in corgi_lcd_probe()
549 						&spi->dev, lcd, &corgi_lcd_ops);  in corgi_lcd_probe()
550 	if (IS_ERR(lcd->lcd_dev))  in corgi_lcd_probe()
551 		return PTR_ERR(lcd->lcd_dev);  in corgi_lcd_probe()
553 	lcd->power = FB_BLANK_POWERDOWN;  in corgi_lcd_probe()
554 	lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;  in corgi_lcd_probe()
559 	lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl",  in corgi_lcd_probe()
560 						&spi->dev, lcd, &corgi_bl_ops,  in corgi_lcd_probe()
562 	if (IS_ERR(lcd->bl_dev))  in corgi_lcd_probe()
563 		return PTR_ERR(lcd->bl_dev);  in corgi_lcd_probe()
565 	lcd->bl_dev->props.brightness = pdata->default_intensity;  in corgi_lcd_probe()
566 	lcd->bl_dev->props.power = FB_BLANK_UNBLANK;  in corgi_lcd_probe()
568 	ret = setup_gpio_backlight(lcd, pdata);  in corgi_lcd_probe()
572 	lcd->kick_battery = pdata->kick_battery;  in corgi_lcd_probe()
574 	spi_set_drvdata(spi, lcd);  in corgi_lcd_probe()
575 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);  in corgi_lcd_probe()
576 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_probe()
578 	lcd->limit_mask = pdata->limit_mask;  in corgi_lcd_probe()
579 	the_corgi_lcd = lcd;  in corgi_lcd_probe()
585 	struct corgi_lcd *lcd = spi_get_drvdata(spi);  in corgi_lcd_remove()  local
587 	lcd->bl_dev->props.power = FB_BLANK_UNBLANK;  in corgi_lcd_remove()
588 	lcd->bl_dev->props.brightness = 0;  in corgi_lcd_remove()
589 	backlight_update_status(lcd->bl_dev);  in corgi_lcd_remove()
590 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);  in corgi_lcd_remove()
596 		.name	= "corgi-lcd",
605 MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00");
608 MODULE_ALIAS("spi:corgi-lcd");