3  * Prolific PL2303 USB to serial adaptor driver
10  * See Documentation/usb/usb-serial.rst for more information on using this
20 #include <linux/serial.h>
26 #include <linux/usb/serial.h>
244 static int pl2303_vendor_read(struct usb_serial *serial, u16 value,  in pl2303_vendor_read()  argument
247 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_vendor_read()
248 	struct device *dev = &serial->interface->dev;  in pl2303_vendor_read()
257 	res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),  in pl2303_vendor_read()
274 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)  in pl2303_vendor_write()  argument
276 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_vendor_write()
277 	struct device *dev = &serial->interface->dev;  in pl2303_vendor_write()
288 	res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),  in pl2303_vendor_write()
300 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)  in pl2303_update_reg()  argument
302 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_update_reg()
311 		ret = pl2303_vendor_read(serial, reg, buf);  in pl2303_update_reg()
313 		ret = pl2303_vendor_read(serial, reg | 0x80, buf);  in pl2303_update_reg()
321 	ret = pl2303_vendor_write(serial, reg, *buf);  in pl2303_update_reg()
328 static int pl2303_probe(struct usb_serial *serial,  in pl2303_probe()  argument
331 	usb_set_serial_data(serial, (void *)id->driver_info);  in pl2303_probe()
341 static int pl2303_endpoint_hack(struct usb_serial *serial,  in pl2303_endpoint_hack()  argument
344 	struct usb_interface *interface = serial->interface;  in pl2303_endpoint_hack()
345 	struct usb_device *dev = serial->dev;  in pl2303_endpoint_hack()
371 static int pl2303_calc_num_ports(struct usb_serial *serial,  in pl2303_calc_num_ports()  argument
374 	unsigned long quirks = (unsigned long)usb_get_serial_data(serial);  in pl2303_calc_num_ports()
375 	struct device *dev = &serial->interface->dev;  in pl2303_calc_num_ports()
379 		ret = pl2303_endpoint_hack(serial, epds);  in pl2303_calc_num_ports()
392 static bool pl2303_supports_hx_status(struct usb_serial *serial)  in pl2303_supports_hx_status()  argument
397 	ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST,  in pl2303_supports_hx_status()
404 static int pl2303_detect_type(struct usb_serial *serial)  in pl2303_detect_type()  argument
406 	struct usb_device_descriptor *desc = &serial->dev->descriptor;  in pl2303_detect_type()
445 			if (pl2303_supports_hx_status(serial))  in pl2303_detect_type()
453 			if (pl2303_supports_hx_status(serial))  in pl2303_detect_type()
468 	dev_err(&serial->interface->dev,  in pl2303_detect_type()
473 static bool pl2303_is_hxd_clone(struct usb_serial *serial)  in pl2303_is_hxd_clone()  argument
475 	struct usb_device *udev = serial->dev;  in pl2303_is_hxd_clone()
492 static int pl2303_startup(struct usb_serial *serial)  in pl2303_startup()  argument
499 	ret = pl2303_detect_type(serial);  in pl2303_startup()
504 	dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name);  in pl2303_startup()
511 	spriv->quirks = (unsigned long)usb_get_serial_data(serial);  in pl2303_startup()
514 	if (type == TYPE_HXD && pl2303_is_hxd_clone(serial))  in pl2303_startup()
517 	usb_set_serial_data(serial, spriv);  in pl2303_startup()
526 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
527 		pl2303_vendor_write(serial, 0x0404, 0);  in pl2303_startup()
528 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
529 		pl2303_vendor_read(serial, 0x8383, buf);  in pl2303_startup()
530 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
531 		pl2303_vendor_write(serial, 0x0404, 1);  in pl2303_startup()
532 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
533 		pl2303_vendor_read(serial, 0x8383, buf);  in pl2303_startup()
534 		pl2303_vendor_write(serial, 0, 1);  in pl2303_startup()
535 		pl2303_vendor_write(serial, 1, 0);  in pl2303_startup()
537 			pl2303_vendor_write(serial, 2, 0x24);  in pl2303_startup()
539 			pl2303_vendor_write(serial, 2, 0x44);  in pl2303_startup()
547 static void pl2303_release(struct usb_serial *serial)  in pl2303_release()  argument
549 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_release()
580 	struct usb_device *dev = port->serial->dev;  in pl2303_set_control_lines()
717 	struct usb_serial *serial = port->serial;  in pl2303_encode_baud_rate()  local
718 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_encode_baud_rate()
753 	struct usb_serial *serial = port->serial;  in pl2303_get_line_request()  local
754 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_get_line_request()
755 	struct usb_device *udev = serial->dev;  in pl2303_get_line_request()
785 	struct usb_device *udev = port->serial->dev;  in pl2303_set_line_request()
830 	struct usb_serial *serial = port->serial;  in pl2303_set_termios()  local
831 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_set_termios()
906 	 * Some PL2303 are known to lose bytes if you change serial settings  in pl2303_set_termios()
940 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);  in pl2303_set_termios()
942 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
946 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);  in pl2303_set_termios()
950 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
954 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);  in pl2303_set_termios()
958 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
962 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);  in pl2303_set_termios()
995 	struct usb_serial *serial = port->serial;  in pl2303_open()  local
996 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_open()
1000 		usb_clear_halt(serial->dev, port->write_urb->pipe);  in pl2303_open()
1001 		usb_clear_halt(serial->dev, port->read_urb->pipe);  in pl2303_open()
1005 			pl2303_vendor_write(serial, PL2303_HXN_RESET_REG,  in pl2303_open()
1009 			pl2303_vendor_write(serial, 8, 0);  in pl2303_open()
1010 			pl2303_vendor_write(serial, 9, 0);  in pl2303_open()
1100 	struct usb_serial *serial = port->serial;  in pl2303_set_break()  local
1101 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_set_break()
1116 	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),  in pl2303_set_break()
1138 	struct usb_serial *serial = port->serial;  in pl2303_update_line_status()  local
1139 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_update_line_status()
1309 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");