1 // SPDX-License-Identifier: GPL-2.0-or-later
122 	array->type = type;  in ssd1307fb_alloc_array()
136 		dev_err(&client->dev, "Couldn't send I2C command.\n");  in ssd1307fb_write_array()
150 		return -ENOMEM;  in ssd1307fb_write_cmd()
152 	array->data[0] = cmd;  in ssd1307fb_write_cmd()
163 	u8 col_end = col_start + cols - 1;  in ssd1307fb_set_col_range()
166 	if (col_start == par->col_start && col_end == par->col_end)  in ssd1307fb_set_col_range()
169 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COL_RANGE);  in ssd1307fb_set_col_range()
173 	ret = ssd1307fb_write_cmd(par->client, col_start);  in ssd1307fb_set_col_range()
177 	ret = ssd1307fb_write_cmd(par->client, col_end);  in ssd1307fb_set_col_range()
181 	par->col_start = col_start;  in ssd1307fb_set_col_range()
182 	par->col_end = col_end;  in ssd1307fb_set_col_range()
189 	u8 page_end = page_start + pages - 1;  in ssd1307fb_set_page_range()
192 	if (page_start == par->page_start && page_end == par->page_end)  in ssd1307fb_set_page_range()
195 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PAGE_RANGE);  in ssd1307fb_set_page_range()
199 	ret = ssd1307fb_write_cmd(par->client, page_start);  in ssd1307fb_set_page_range()
203 	ret = ssd1307fb_write_cmd(par->client, page_end);  in ssd1307fb_set_page_range()
207 	par->page_start = page_start;  in ssd1307fb_set_page_range()
208 	par->page_end = page_end;  in ssd1307fb_set_page_range()
217 	u8 *vmem = par->info->screen_buffer;  in ssd1307fb_update_rect()
218 	unsigned int line_length = par->info->fix.line_length;  in ssd1307fb_update_rect()
225 		return -ENOMEM;  in ssd1307fb_update_rect()
236 	 * wide. Each letter-number combination is a bit that controls  in ssd1307fb_update_rect()
256 	ret = ssd1307fb_set_col_range(par, par->col_offset + x, width);  in ssd1307fb_update_rect()
260 	ret = ssd1307fb_set_page_range(par, par->page_offset + y / 8, pages);  in ssd1307fb_update_rect()
268 		if (8 * (i + 1) > par->height)  in ssd1307fb_update_rect()
269 			m = par->height % 8;  in ssd1307fb_update_rect()
279 			array->data[array_idx++] = data;  in ssd1307fb_update_rect()
283 	ret = ssd1307fb_write_array(par->client, array, width * pages);  in ssd1307fb_update_rect()
292 	return ssd1307fb_update_rect(par, 0, 0, par->width, par->height);  in ssd1307fb_update_display()
297 	struct ssd1307fb_par *par = info->par;  in ssd1307fb_blank()
300 		return ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF);  in ssd1307fb_blank()
302 		return ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);  in ssd1307fb_blank()
307 	struct ssd1307fb_par *par = info->par;  in ssd1307fb_defio_damage_range()
315 	struct ssd1307fb_par *par = info->par;  in ssd1307fb_defio_damage_area()
332 	ssd1307fb_update_display(info->par);  in ssd1307fb_deferred_io()
341 	if (par->device_info->need_pwm) {  in ssd1307fb_init()
342 		par->pwm = pwm_get(&par->client->dev, NULL);  in ssd1307fb_init()
343 		if (IS_ERR(par->pwm)) {  in ssd1307fb_init()
344 			dev_err(&par->client->dev, "Could not get PWM from device tree!\n");  in ssd1307fb_init()
345 			return PTR_ERR(par->pwm);  in ssd1307fb_init()
348 		pwm_init_state(par->pwm, &pwmstate);  in ssd1307fb_init()
350 		pwm_apply_might_sleep(par->pwm, &pwmstate);  in ssd1307fb_init()
353 		pwm_enable(par->pwm);  in ssd1307fb_init()
355 		dev_dbg(&par->client->dev, "Using PWM %s with a %lluns period.\n",  in ssd1307fb_init()
356 			par->pwm->label, pwm_get_period(par->pwm));  in ssd1307fb_init()
360 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST);  in ssd1307fb_init()
364 	ret = ssd1307fb_write_cmd(par->client, par->contrast);  in ssd1307fb_init()
368 	/* Set segment re-map */  in ssd1307fb_init()
369 	if (par->seg_remap) {  in ssd1307fb_init()
370 		ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SEG_REMAP_ON);  in ssd1307fb_init()
376 	com_invdir = 0xc0 | par->com_invdir << 3;  in ssd1307fb_init()
377 	ret = ssd1307fb_write_cmd(par->client,  com_invdir);  in ssd1307fb_init()
382 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_MULTIPLEX_RATIO);  in ssd1307fb_init()
386 	ret = ssd1307fb_write_cmd(par->client, par->height - 1);  in ssd1307fb_init()
391 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_DISPLAY_OFFSET);  in ssd1307fb_init()
395 	ret = ssd1307fb_write_cmd(par->client, par->com_offset);  in ssd1307fb_init()
400 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_CLOCK_FREQ);  in ssd1307fb_init()
404 	dclk = ((par->dclk_div - 1) & 0xf) | (par->dclk_frq & 0xf) << 4;  in ssd1307fb_init()
405 	ret = ssd1307fb_write_cmd(par->client, dclk);  in ssd1307fb_init()
410 	if (par->area_color_enable || par->low_power) {  in ssd1307fb_init()
413 		ret = ssd1307fb_write_cmd(par->client,  in ssd1307fb_init()
418 		mode = (par->area_color_enable ? 0x30 : 0) |  in ssd1307fb_init()
419 			(par->low_power ? 5 : 0);  in ssd1307fb_init()
420 		ret = ssd1307fb_write_cmd(par->client, mode);  in ssd1307fb_init()
426 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_PRECHARGE_PERIOD);  in ssd1307fb_init()
430 	precharge = (par->prechargep1 & 0xf) | (par->prechargep2 & 0xf) << 4;  in ssd1307fb_init()
431 	ret = ssd1307fb_write_cmd(par->client, precharge);  in ssd1307fb_init()
436 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_COM_PINS_CONFIG);  in ssd1307fb_init()
440 	compins = 0x02 | !par->com_seq << 4 | par->com_lrremap << 5;  in ssd1307fb_init()
441 	ret = ssd1307fb_write_cmd(par->client, compins);  in ssd1307fb_init()
446 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_VCOMH);  in ssd1307fb_init()
450 	ret = ssd1307fb_write_cmd(par->client, par->vcomh);  in ssd1307fb_init()
454 	/* Turn on the DC-DC Charge Pump */  in ssd1307fb_init()
455 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CHARGE_PUMP);  in ssd1307fb_init()
459 	ret = ssd1307fb_write_cmd(par->client,  in ssd1307fb_init()
460 		BIT(4) | (par->device_info->need_chargepump ? BIT(2) : 0));  in ssd1307fb_init()
465 	if (par->lookup_table_set) {  in ssd1307fb_init()
468 		ret = ssd1307fb_write_cmd(par->client,  in ssd1307fb_init()
473 		for (i = 0; i < ARRAY_SIZE(par->lookup_table); ++i) {  in ssd1307fb_init()
474 			u8 val = par->lookup_table[i];  in ssd1307fb_init()
477 				dev_warn(&par->client->dev,  in ssd1307fb_init()
480 			ret = ssd1307fb_write_cmd(par->client, val);  in ssd1307fb_init()
487 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_SET_ADDRESS_MODE);  in ssd1307fb_init()
491 	ret = ssd1307fb_write_cmd(par->client,  in ssd1307fb_init()
502 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);  in ssd1307fb_init()
513 	int brightness = bdev->props.brightness;  in ssd1307fb_update_bl()
515 	par->contrast = brightness;  in ssd1307fb_update_bl()
517 	ret = ssd1307fb_write_cmd(par->client, SSD1307FB_CONTRAST);  in ssd1307fb_update_bl()
520 	ret = ssd1307fb_write_cmd(par->client, par->contrast);  in ssd1307fb_update_bl()
530 	return par->contrast;  in ssd1307fb_get_brightness()
567 		.compatible = "solomon,ssd1305fb-i2c",
571 		.compatible = "solomon,ssd1306fb-i2c",
575 		.compatible = "solomon,ssd1307fb-i2c",
579 		.compatible = "solomon,ssd1309fb-i2c",
588 	struct device *dev = &client->dev;  in ssd1307fb_probe()
599 		return -ENOMEM;  in ssd1307fb_probe()
601 	par = info->par;  in ssd1307fb_probe()
602 	par->info = info;  in ssd1307fb_probe()
603 	par->client = client;  in ssd1307fb_probe()
605 	par->device_info = device_get_match_data(dev);  in ssd1307fb_probe()
607 	par->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in ssd1307fb_probe()
608 	if (IS_ERR(par->reset)) {  in ssd1307fb_probe()
609 		ret = dev_err_probe(dev, PTR_ERR(par->reset),  in ssd1307fb_probe()
614 	par->vbat_reg = devm_regulator_get_optional(dev, "vbat");  in ssd1307fb_probe()
615 	if (IS_ERR(par->vbat_reg)) {  in ssd1307fb_probe()
616 		ret = PTR_ERR(par->vbat_reg);  in ssd1307fb_probe()
617 		if (ret == -ENODEV) {  in ssd1307fb_probe()
618 			par->vbat_reg = NULL;  in ssd1307fb_probe()
625 	if (device_property_read_u32(dev, "solomon,width", &par->width))  in ssd1307fb_probe()
626 		par->width = 96;  in ssd1307fb_probe()
628 	if (device_property_read_u32(dev, "solomon,height", &par->height))  in ssd1307fb_probe()
629 		par->height = 16;  in ssd1307fb_probe()
631 	if (device_property_read_u32(dev, "solomon,page-offset", &par->page_offset))  in ssd1307fb_probe()
632 		par->page_offset = 1;  in ssd1307fb_probe()
634 	if (device_property_read_u32(dev, "solomon,col-offset", &par->col_offset))  in ssd1307fb_probe()
635 		par->col_offset = 0;  in ssd1307fb_probe()
637 	if (device_property_read_u32(dev, "solomon,com-offset", &par->com_offset))  in ssd1307fb_probe()
638 		par->com_offset = 0;  in ssd1307fb_probe()
640 	if (device_property_read_u32(dev, "solomon,prechargep1", &par->prechargep1))  in ssd1307fb_probe()
641 		par->prechargep1 = 2;  in ssd1307fb_probe()
643 	if (device_property_read_u32(dev, "solomon,prechargep2", &par->prechargep2))  in ssd1307fb_probe()
644 		par->prechargep2 = 2;  in ssd1307fb_probe()
646 	if (!device_property_read_u8_array(dev, "solomon,lookup-table",  in ssd1307fb_probe()
647 					   par->lookup_table,  in ssd1307fb_probe()
648 					   ARRAY_SIZE(par->lookup_table)))  in ssd1307fb_probe()
649 		par->lookup_table_set = 1;  in ssd1307fb_probe()
651 	par->seg_remap = !device_property_read_bool(dev, "solomon,segment-no-remap");  in ssd1307fb_probe()
652 	par->com_seq = device_property_read_bool(dev, "solomon,com-seq");  in ssd1307fb_probe()
653 	par->com_lrremap = device_property_read_bool(dev, "solomon,com-lrremap");  in ssd1307fb_probe()
654 	par->com_invdir = device_property_read_bool(dev, "solomon,com-invdir");  in ssd1307fb_probe()
655 	par->area_color_enable =  in ssd1307fb_probe()
656 		device_property_read_bool(dev, "solomon,area-color-enable");  in ssd1307fb_probe()
657 	par->low_power = device_property_read_bool(dev, "solomon,low-power");  in ssd1307fb_probe()
659 	par->contrast = 127;  in ssd1307fb_probe()
660 	par->vcomh = par->device_info->default_vcomh;  in ssd1307fb_probe()
663 	if (device_property_read_u32(dev, "solomon,dclk-div", &par->dclk_div))  in ssd1307fb_probe()
664 		par->dclk_div = par->device_info->default_dclk_div;  in ssd1307fb_probe()
665 	if (device_property_read_u32(dev, "solomon,dclk-frq", &par->dclk_frq))  in ssd1307fb_probe()
666 		par->dclk_frq = par->device_info->default_dclk_frq;  in ssd1307fb_probe()
668 	vmem_size = DIV_ROUND_UP(par->width, 8) * par->height;  in ssd1307fb_probe()
674 		ret = -ENOMEM;  in ssd1307fb_probe()
682 		ret = -ENOMEM;  in ssd1307fb_probe()
686 	ssd1307fb_defio->delay = HZ / refreshrate;  in ssd1307fb_probe()
687 	ssd1307fb_defio->deferred_io = ssd1307fb_deferred_io;  in ssd1307fb_probe()
689 	info->fbops = &ssd1307fb_ops;  in ssd1307fb_probe()
690 	info->fix = ssd1307fb_fix;  in ssd1307fb_probe()
691 	info->fix.line_length = DIV_ROUND_UP(par->width, 8);  in ssd1307fb_probe()
692 	info->fbdefio = ssd1307fb_defio;  in ssd1307fb_probe()
694 	info->var = ssd1307fb_var;  in ssd1307fb_probe()
695 	info->var.xres = par->width;  in ssd1307fb_probe()
696 	info->var.xres_virtual = par->width;  in ssd1307fb_probe()
697 	info->var.yres = par->height;  in ssd1307fb_probe()
698 	info->var.yres_virtual = par->height;  in ssd1307fb_probe()
700 	info->screen_buffer = vmem;  in ssd1307fb_probe()
701 	info->fix.smem_start = __pa(vmem);  in ssd1307fb_probe()
702 	info->fix.smem_len = vmem_size;  in ssd1307fb_probe()
708 	if (par->reset) {  in ssd1307fb_probe()
710 		gpiod_set_value_cansleep(par->reset, 1);  in ssd1307fb_probe()
712 		gpiod_set_value_cansleep(par->reset, 0);  in ssd1307fb_probe()
716 	if (par->vbat_reg) {  in ssd1307fb_probe()
717 		ret = regulator_enable(par->vbat_reg);  in ssd1307fb_probe()
728 	bl = backlight_device_register("ssd1307fb-bl", dev, par, &ssd1307fb_bl_ops,  in ssd1307fb_probe()
735 	info->bl_dev = bl;  in ssd1307fb_probe()
743 	bl->props.brightness = par->contrast;  in ssd1307fb_probe()
744 	bl->props.max_brightness = MAX_CONTRAST;  in ssd1307fb_probe()
746 …framebuffer device registered, using %d bytes of video memory\n", info->node, info->fix.id, vmem_s…  in ssd1307fb_probe()
753 	pwm_disable(par->pwm);  in ssd1307fb_probe()
754 	pwm_put(par->pwm);  in ssd1307fb_probe()
756 	if (par->vbat_reg)  in ssd1307fb_probe()
757 		regulator_disable(par->vbat_reg);  in ssd1307fb_probe()
768 	struct ssd1307fb_par *par = info->par;  in ssd1307fb_remove()
770 	ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF);  in ssd1307fb_remove()
772 	backlight_device_unregister(info->bl_dev);  in ssd1307fb_remove()
775 	pwm_disable(par->pwm);  in ssd1307fb_remove()
776 	pwm_put(par->pwm);  in ssd1307fb_remove()
777 	if (par->vbat_reg)  in ssd1307fb_remove()
778 		regulator_disable(par->vbat_reg);  in ssd1307fb_remove()
780 	__free_pages(__va(info->fix.smem_start), get_order(info->fix.smem_len));  in ssd1307fb_remove()
806 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");