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>
240 static int pl2303_vendor_read(struct usb_serial *serial, u16 value,  in pl2303_vendor_read()  argument
243 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_vendor_read()
244 	struct device *dev = &serial->interface->dev;  in pl2303_vendor_read()
253 	res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),  in pl2303_vendor_read()
270 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)  in pl2303_vendor_write()  argument
272 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_vendor_write()
273 	struct device *dev = &serial->interface->dev;  in pl2303_vendor_write()
284 	res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),  in pl2303_vendor_write()
296 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)  in pl2303_update_reg()  argument
298 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_update_reg()
307 		ret = pl2303_vendor_read(serial, reg, buf);  in pl2303_update_reg()
309 		ret = pl2303_vendor_read(serial, reg | 0x80, buf);  in pl2303_update_reg()
317 	ret = pl2303_vendor_write(serial, reg, *buf);  in pl2303_update_reg()
324 static int pl2303_probe(struct usb_serial *serial,  in pl2303_probe()  argument
327 	usb_set_serial_data(serial, (void *)id->driver_info);  in pl2303_probe()
337 static int pl2303_endpoint_hack(struct usb_serial *serial,  in pl2303_endpoint_hack()  argument
340 	struct usb_interface *interface = serial->interface;  in pl2303_endpoint_hack()
341 	struct usb_device *dev = serial->dev;  in pl2303_endpoint_hack()
367 static int pl2303_calc_num_ports(struct usb_serial *serial,  in pl2303_calc_num_ports()  argument
370 	unsigned long quirks = (unsigned long)usb_get_serial_data(serial);  in pl2303_calc_num_ports()
371 	struct device *dev = &serial->interface->dev;  in pl2303_calc_num_ports()
375 		ret = pl2303_endpoint_hack(serial, epds);  in pl2303_calc_num_ports()
388 static bool pl2303_supports_hx_status(struct usb_serial *serial)  in pl2303_supports_hx_status()  argument
393 	ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST,  in pl2303_supports_hx_status()
400 static int pl2303_detect_type(struct usb_serial *serial)  in pl2303_detect_type()  argument
402 	struct usb_device_descriptor *desc = &serial->dev->descriptor;  in pl2303_detect_type()
441 			if (!pl2303_supports_hx_status(serial))  in pl2303_detect_type()
452 	dev_err(&serial->interface->dev,  in pl2303_detect_type()
457 static int pl2303_startup(struct usb_serial *serial)  in pl2303_startup()  argument
464 	ret = pl2303_detect_type(serial);  in pl2303_startup()
469 	dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name);  in pl2303_startup()
476 	spriv->quirks = (unsigned long)usb_get_serial_data(serial);  in pl2303_startup()
479 	usb_set_serial_data(serial, spriv);  in pl2303_startup()
488 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
489 		pl2303_vendor_write(serial, 0x0404, 0);  in pl2303_startup()
490 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
491 		pl2303_vendor_read(serial, 0x8383, buf);  in pl2303_startup()
492 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
493 		pl2303_vendor_write(serial, 0x0404, 1);  in pl2303_startup()
494 		pl2303_vendor_read(serial, 0x8484, buf);  in pl2303_startup()
495 		pl2303_vendor_read(serial, 0x8383, buf);  in pl2303_startup()
496 		pl2303_vendor_write(serial, 0, 1);  in pl2303_startup()
497 		pl2303_vendor_write(serial, 1, 0);  in pl2303_startup()
499 			pl2303_vendor_write(serial, 2, 0x24);  in pl2303_startup()
501 			pl2303_vendor_write(serial, 2, 0x44);  in pl2303_startup()
509 static void pl2303_release(struct usb_serial *serial)  in pl2303_release()  argument
511 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_release()
542 	struct usb_device *dev = port->serial->dev;  in pl2303_set_control_lines()
679 	struct usb_serial *serial = port->serial;  in pl2303_encode_baud_rate()  local
680 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_encode_baud_rate()
715 	struct usb_device *udev = port->serial->dev;  in pl2303_get_line_request()
738 	struct usb_device *udev = port->serial->dev;  in pl2303_set_line_request()
782 	struct usb_serial *serial = port->serial;  in pl2303_set_termios()  local
783 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_set_termios()
858 	 * Some PL2303 are known to lose bytes if you change serial settings  in pl2303_set_termios()
892 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);  in pl2303_set_termios()
894 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
898 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);  in pl2303_set_termios()
902 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
906 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);  in pl2303_set_termios()
910 			pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,  in pl2303_set_termios()
914 			pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);  in pl2303_set_termios()
947 	struct usb_serial *serial = port->serial;  in pl2303_open()  local
948 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_open()
952 		usb_clear_halt(serial->dev, port->write_urb->pipe);  in pl2303_open()
953 		usb_clear_halt(serial->dev, port->read_urb->pipe);  in pl2303_open()
957 			pl2303_vendor_write(serial, PL2303_HXN_RESET_REG,  in pl2303_open()
961 			pl2303_vendor_write(serial, 8, 0);  in pl2303_open()
962 			pl2303_vendor_write(serial, 9, 0);  in pl2303_open()
1052 	struct usb_serial *serial = port->serial;  in pl2303_set_break()  local
1064 	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),  in pl2303_set_break()
1082 	struct usb_serial *serial = port->serial;  in pl2303_update_line_status()  local
1083 	struct pl2303_serial_private *spriv = usb_get_serial_data(serial);  in pl2303_update_line_status()
1254 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");