3  * Apple Z2 touchscreen driver
30 #define CAL_PROP_NAME                    "apple,z2-cal-blob"
82 static void apple_z2_parse_touches(struct apple_z2 *z2,  in apple_z2_parse_touches()  argument
96 		slot = input_mt_get_slot_by_key(z2->input_dev, fingers[i].finger);  in apple_z2_parse_touches()
98 			dev_warn(&z2->spidev->dev, "unable to get slot for finger\n");  in apple_z2_parse_touches()
103 		input_mt_slot(z2->input_dev, slot);  in apple_z2_parse_touches()
104 		if (!input_mt_report_slot_state(z2->input_dev, MT_TOOL_FINGER, slot_valid))  in apple_z2_parse_touches()
106 		touchscreen_report_pos(z2->input_dev, &z2->props,  in apple_z2_parse_touches()
110 		input_report_abs(z2->input_dev, ABS_MT_WIDTH_MAJOR,  in apple_z2_parse_touches()
112 		input_report_abs(z2->input_dev, ABS_MT_WIDTH_MINOR,  in apple_z2_parse_touches()
114 		input_report_abs(z2->input_dev, ABS_MT_ORIENTATION,  in apple_z2_parse_touches()
116 		input_report_abs(z2->input_dev, ABS_MT_TOUCH_MAJOR,  in apple_z2_parse_touches()
118 		input_report_abs(z2->input_dev, ABS_MT_TOUCH_MINOR,  in apple_z2_parse_touches()
121 	input_mt_sync_frame(z2->input_dev);  in apple_z2_parse_touches()
122 	input_sync(z2->input_dev);  in apple_z2_parse_touches()
125 static int apple_z2_read_packet(struct apple_z2 *z2)  in apple_z2_read_packet()  argument
127 	struct apple_z2_read_interrupt_cmd *len_cmd = (void *)z2->tx_buf;  in apple_z2_read_packet()
134 	len_cmd->counter = z2->index_parity + 1;  in apple_z2_read_packet()
137 	z2->index_parity = !z2->index_parity;  in apple_z2_read_packet()
138 	xfer.tx_buf = z2->tx_buf;  in apple_z2_read_packet()
139 	xfer.rx_buf = z2->rx_buf;  in apple_z2_read_packet()
142 	error = spi_sync_transfer(z2->spidev, &xfer, 1);  in apple_z2_read_packet()
146 	if (z2->rx_buf[0] != APPLE_Z2_REPLY_INTERRUPT_DATA)  in apple_z2_read_packet()
149 	pkt_len = (get_unaligned_le16(z2->rx_buf + 1) + 8) & 0xfffffffc;  in apple_z2_read_packet()
151 	error = spi_read(z2->spidev, z2->rx_buf, pkt_len);  in apple_z2_read_packet()
155 	apple_z2_parse_touches(z2, z2->rx_buf + 5, pkt_len - 5);  in apple_z2_read_packet()
162 	struct apple_z2 *z2 = data;  in apple_z2_irq()  local
164 	if (unlikely(!z2->booted))  in apple_z2_irq()
165 		complete(&z2->boot_irq);  in apple_z2_irq()
167 		apple_z2_read_packet(z2);  in apple_z2_irq()
173 static const u8 *apple_z2_build_cal_blob(struct apple_z2 *z2,  in apple_z2_build_cal_blob()  argument
185 	if (!device_property_present(&z2->spidev->dev, CAL_PROP_NAME))  in apple_z2_build_cal_blob()
188 	cal_size = device_property_count_u8(&z2->spidev->dev, CAL_PROP_NAME);  in apple_z2_build_cal_blob()
208 	error = device_property_read_u8_array(&z2->spidev->dev, CAL_PROP_NAME,  in apple_z2_build_cal_blob()
222 static int apple_z2_send_firmware_blob(struct apple_z2 *z2, const u8 *data,  in apple_z2_send_firmware_blob()  argument
229 	z2->tx_buf[0] = 0x1a;  in apple_z2_send_firmware_blob()
230 	z2->tx_buf[1] = 0xa1;  in apple_z2_send_firmware_blob()
241 	ack_xfer.tx_buf = z2->tx_buf;  in apple_z2_send_firmware_blob()
245 	reinit_completion(&z2->boot_irq);  in apple_z2_send_firmware_blob()
246 	error = spi_sync(z2->spidev, &msg);  in apple_z2_send_firmware_blob()
251 	wait_for_completion_timeout(&z2->boot_irq, msecs_to_jiffies(20));  in apple_z2_send_firmware_blob()
256 static int apple_z2_upload_firmware(struct apple_z2 *z2)  in apple_z2_upload_firmware()  argument
267 	error = request_firmware(&fw, z2->fw_name, &z2->spidev->dev);  in apple_z2_upload_firmware()
269 		dev_err(&z2->spidev->dev, "unable to load firmware\n");  in apple_z2_upload_firmware()
275 		dev_err(&z2->spidev->dev, "invalid firmware header\n");  in apple_z2_upload_firmware()
286 			dev_err(&z2->spidev->dev, "firmware malformed\n");  in apple_z2_upload_firmware()
296 				dev_err(&z2->spidev->dev, "firmware malformed\n");  in apple_z2_upload_firmware()
300 			error = apple_z2_send_firmware_blob(z2, fw->data + fw_idx,  in apple_z2_upload_firmware()
310 				apple_z2_build_cal_blob(z2, address, &size);  in apple_z2_upload_firmware()
315 				error = apple_z2_send_firmware_blob(z2, data, size, false);  in apple_z2_upload_firmware()
320 			dev_err(&z2->spidev->dev, "firmware malformed\n");  in apple_z2_upload_firmware()
327 	z2->booted = true;  in apple_z2_upload_firmware()
328 	apple_z2_read_packet(z2);  in apple_z2_upload_firmware()
332 static int apple_z2_boot(struct apple_z2 *z2)  in apple_z2_boot()  argument
336 	reinit_completion(&z2->boot_irq);  in apple_z2_boot()
337 	enable_irq(z2->spidev->irq);  in apple_z2_boot()
338 	gpiod_set_value(z2->reset_gpio, 0);  in apple_z2_boot()
339 	if (!wait_for_completion_timeout(&z2->boot_irq, msecs_to_jiffies(20)))  in apple_z2_boot()
342 	error = apple_z2_upload_firmware(z2);  in apple_z2_boot()
344 		gpiod_set_value(z2->reset_gpio, 1);  in apple_z2_boot()
345 		disable_irq(z2->spidev->irq);  in apple_z2_boot()
355 	struct apple_z2 *z2;  in apple_z2_probe()  local
358 	z2 = devm_kzalloc(dev, sizeof(*z2), GFP_KERNEL);  in apple_z2_probe()
359 	if (!z2)  in apple_z2_probe()
362 	z2->tx_buf = devm_kzalloc(dev, sizeof(struct apple_z2_read_interrupt_cmd), GFP_KERNEL);  in apple_z2_probe()
363 	if (!z2->tx_buf)  in apple_z2_probe()
366 	z2->rx_buf = devm_kzalloc(dev, 4000, GFP_KERNEL);  in apple_z2_probe()
367 	if (!z2->rx_buf)  in apple_z2_probe()
370 	z2->spidev = spi;  in apple_z2_probe()
371 	init_completion(&z2->boot_irq);  in apple_z2_probe()
372 	spi_set_drvdata(spi, z2);  in apple_z2_probe()
375 	z2->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);  in apple_z2_probe()
376 	if (IS_ERR(z2->reset_gpio))  in apple_z2_probe()
377 		return dev_err_probe(dev, PTR_ERR(z2->reset_gpio), "unable to get reset\n");  in apple_z2_probe()
379 	error = devm_request_threaded_irq(dev, z2->spidev->irq, NULL, apple_z2_irq,  in apple_z2_probe()
381 					  "apple-z2-irq", z2);  in apple_z2_probe()
385 	error = device_property_read_string(dev, "firmware-name", &z2->fw_name);  in apple_z2_probe()
389 	z2->input_dev = devm_input_allocate_device(dev);  in apple_z2_probe()
390 	if (!z2->input_dev)  in apple_z2_probe()
393 	z2->input_dev->name = (char *)spi_get_device_id(spi)->driver_data;  in apple_z2_probe()
394 	z2->input_dev->phys = "apple_z2";  in apple_z2_probe()
395 	z2->input_dev->id.bustype = BUS_SPI;  in apple_z2_probe()
398 	input_set_abs_params(z2->input_dev, ABS_MT_POSITION_X, 0, 0, 0, 0);  in apple_z2_probe()
399 	input_set_abs_params(z2->input_dev, ABS_MT_POSITION_Y, 0, 0, 0, 0);  in apple_z2_probe()
400 	touchscreen_parse_properties(z2->input_dev, true, &z2->props);  in apple_z2_probe()
401 	input_abs_set_res(z2->input_dev, ABS_MT_POSITION_X, 100);  in apple_z2_probe()
402 	input_abs_set_res(z2->input_dev, ABS_MT_POSITION_Y, 100);  in apple_z2_probe()
403 	input_set_abs_params(z2->input_dev, ABS_MT_WIDTH_MAJOR, 0, 65535, 0, 0);  in apple_z2_probe()
404 	input_set_abs_params(z2->input_dev, ABS_MT_WIDTH_MINOR, 0, 65535, 0, 0);  in apple_z2_probe()
405 	input_set_abs_params(z2->input_dev, ABS_MT_TOUCH_MAJOR, 0, 65535, 0, 0);  in apple_z2_probe()
406 	input_set_abs_params(z2->input_dev, ABS_MT_TOUCH_MINOR, 0, 65535, 0, 0);  in apple_z2_probe()
407 	input_set_abs_params(z2->input_dev, ABS_MT_ORIENTATION, -32768, 32767, 0, 0);  in apple_z2_probe()
409 	error = input_mt_init_slots(z2->input_dev, 256, INPUT_MT_DIRECT);  in apple_z2_probe()
413 	error = input_register_device(z2->input_dev);  in apple_z2_probe()
419 	error = apple_z2_boot(z2);  in apple_z2_probe()
428 	struct apple_z2 *z2 = spi_get_drvdata(spi);  in apple_z2_shutdown()  local
430 	disable_irq(z2->spidev->irq);  in apple_z2_shutdown()
431 	gpiod_direction_output(z2->reset_gpio, 1);  in apple_z2_shutdown()
432 	z2->booted = false;  in apple_z2_shutdown()
444 	struct apple_z2 *z2 = spi_get_drvdata(to_spi_device(dev));  in apple_z2_resume()  local
446 	return apple_z2_boot(z2);  in apple_z2_resume()
467 		.name	= "apple-z2",
481 MODULE_DESCRIPTION("Apple Z2 touchscreens driver");