Lines Matching +full:serial +full:- +full:state
1 // SPDX-License-Identifier: GPL-2.0
3 * Prolific PL2303 USB to serial adaptor driver
5 * Copyright (C) 2001-2007 Greg Kroah-Hartman ([email protected])
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()
252 if (spriv->type == &pl2303_type_data[TYPE_HXN]) in pl2303_vendor_read()
257 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), in pl2303_vendor_read()
261 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, in pl2303_vendor_read()
264 res = -EIO; in pl2303_vendor_read()
269 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[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()
281 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); in pl2303_vendor_write()
283 if (spriv->type == &pl2303_type_data[TYPE_HXN]) in pl2303_vendor_write()
288 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), in pl2303_vendor_write()
292 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 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()
308 return -ENOMEM; in pl2303_update_reg()
310 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 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()
346 struct device *ddev = &interface->dev; in pl2303_endpoint_hack()
351 if (interface == dev->actconfig->interface[0]) in pl2303_endpoint_hack()
355 iface_desc = dev->actconfig->interface[0]->cur_altsetting; in pl2303_endpoint_hack()
357 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { in pl2303_endpoint_hack()
358 endpoint = &iface_desc->endpoint[i].desc; in pl2303_endpoint_hack()
364 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) in pl2303_endpoint_hack()
365 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 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()
384 if (epds->num_interrupt_in < 1) { in pl2303_calc_num_ports()
385 dev_err(dev, "required interrupt-in endpoint missing\n"); in pl2303_calc_num_ports()
386 return -ENODEV; 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()
412 if (desc->bDeviceClass == 0x02) in pl2303_detect_type()
415 if (desc->bMaxPacketSize0 != 0x40) { in pl2303_detect_type()
416 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) in pl2303_detect_type()
422 bcdDevice = le16_to_cpu(desc->bcdDevice); in pl2303_detect_type()
423 bcdUSB = le16_to_cpu(desc->bcdUSB); 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()
466 dev_err(&serial->interface->dev, in pl2303_detect_type()
467 "unknown device type, please report to linux-[email protected]\n"); in pl2303_detect_type()
468 return -ENODEV; in pl2303_detect_type()
471 static bool pl2303_is_hxd_clone(struct usb_serial *serial) in pl2303_is_hxd_clone() argument
473 struct usb_device *udev = serial->dev; in pl2303_is_hxd_clone()
487 return ret == -EPIPE; in pl2303_is_hxd_clone()
490 static int pl2303_startup(struct usb_serial *serial) in pl2303_startup() argument
497 ret = pl2303_detect_type(serial); in pl2303_startup()
502 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); in pl2303_startup()
506 return -ENOMEM; in pl2303_startup()
508 spriv->type = &pl2303_type_data[type]; in pl2303_startup()
509 spriv->quirks = (unsigned long)usb_get_serial_data(serial); in pl2303_startup()
510 spriv->quirks |= spriv->type->quirks; in pl2303_startup()
512 if (type == TYPE_HXD && pl2303_is_hxd_clone(serial)) in pl2303_startup()
513 spriv->quirks |= PL2303_QUIRK_NO_BREAK_GETLINE; in pl2303_startup()
515 usb_set_serial_data(serial, spriv); in pl2303_startup()
521 return -ENOMEM; in pl2303_startup()
524 pl2303_vendor_read(serial, 0x8484, buf); in pl2303_startup()
525 pl2303_vendor_write(serial, 0x0404, 0); in pl2303_startup()
526 pl2303_vendor_read(serial, 0x8484, buf); in pl2303_startup()
527 pl2303_vendor_read(serial, 0x8383, buf); in pl2303_startup()
528 pl2303_vendor_read(serial, 0x8484, buf); in pl2303_startup()
529 pl2303_vendor_write(serial, 0x0404, 1); in pl2303_startup()
530 pl2303_vendor_read(serial, 0x8484, buf); in pl2303_startup()
531 pl2303_vendor_read(serial, 0x8383, buf); in pl2303_startup()
532 pl2303_vendor_write(serial, 0, 1); in pl2303_startup()
533 pl2303_vendor_write(serial, 1, 0); in pl2303_startup()
534 if (spriv->quirks & PL2303_QUIRK_LEGACY) in pl2303_startup()
535 pl2303_vendor_write(serial, 2, 0x24); in pl2303_startup()
537 pl2303_vendor_write(serial, 2, 0x44); in pl2303_startup()
545 static void pl2303_release(struct usb_serial *serial) in pl2303_release() argument
547 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_release()
558 return -ENOMEM; in pl2303_port_probe()
560 spin_lock_init(&priv->lock); in pl2303_port_probe()
564 port->port.drain_delay = 256; in pl2303_port_probe()
578 struct usb_device *dev = port->serial->dev; in pl2303_set_control_lines()
581 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); in pl2303_set_control_lines()
587 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); in pl2303_set_control_lines()
612 baud = baud_sup[i - 1]; in pl2303_get_supported_baud_rate()
613 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) in pl2303_get_supported_baud_rate()
614 baud = baud_sup[i - 1]; in pl2303_get_supported_baud_rate()
715 struct usb_serial *serial = port->serial; in pl2303_encode_baud_rate() local
716 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_encode_baud_rate()
721 dev_dbg(&port->dev, "baud requested = %u\n", baud); in pl2303_encode_baud_rate()
725 if (spriv->type->max_baud_rate) in pl2303_encode_baud_rate()
726 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); in pl2303_encode_baud_rate()
731 if (spriv->type->no_divisors) in pl2303_encode_baud_rate()
738 else if (spriv->type->alt_divisors) in pl2303_encode_baud_rate()
745 dev_dbg(&port->dev, "baud set = %u\n", baud); in pl2303_encode_baud_rate()
751 struct usb_serial *serial = port->serial; in pl2303_get_line_request() local
752 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_get_line_request()
753 struct usb_device *udev = serial->dev; in pl2303_get_line_request()
756 if (spriv->quirks & PL2303_QUIRK_NO_BREAK_GETLINE) { in pl2303_get_line_request()
759 memcpy(buf, priv->line_settings, 7); in pl2303_get_line_request()
767 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); in pl2303_get_line_request()
770 ret = -EIO; in pl2303_get_line_request()
775 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); in pl2303_get_line_request()
783 struct usb_device *udev = port->serial->dev; in pl2303_set_line_request()
790 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); in pl2303_set_line_request()
794 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); in pl2303_set_line_request()
803 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || in pl2303_termios_change()
804 a->c_cc[VSTART] != b->c_cc[VSTART] || in pl2303_termios_change()
805 a->c_cc[VSTOP] != b->c_cc[VSTOP]; in pl2303_termios_change()
818 if (type->no_autoxonxoff) in pl2303_enable_xonxoff()
828 struct usb_serial *serial = port->serial; in pl2303_set_termios() local
829 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_set_termios()
836 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) in pl2303_set_termios()
843 tty->termios = *old_termios; in pl2303_set_termios()
849 buf[6] = tty_get_char_size(tty->termios.c_cflag); in pl2303_set_termios()
850 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); in pl2303_set_termios()
865 dev_dbg(&port->dev, "stop bits = 1.5\n"); in pl2303_set_termios()
868 dev_dbg(&port->dev, "stop bits = 2\n"); in pl2303_set_termios()
872 dev_dbg(&port->dev, "stop bits = 1\n"); in pl2303_set_termios()
884 dev_dbg(&port->dev, "parity = mark\n"); in pl2303_set_termios()
887 dev_dbg(&port->dev, "parity = odd\n"); in pl2303_set_termios()
892 dev_dbg(&port->dev, "parity = space\n"); in pl2303_set_termios()
895 dev_dbg(&port->dev, "parity = even\n"); in pl2303_set_termios()
900 dev_dbg(&port->dev, "parity = none\n"); in pl2303_set_termios()
904 * Some PL2303 are known to lose bytes if you change serial settings in pl2303_set_termios()
915 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { in pl2303_set_termios()
918 memcpy(priv->line_settings, buf, 7); in pl2303_set_termios()
922 spin_lock_irqsave(&priv->lock, flags); in pl2303_set_termios()
923 control = priv->line_control; in pl2303_set_termios()
925 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); in pl2303_set_termios()
926 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) in pl2303_set_termios()
927 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); in pl2303_set_termios()
928 if (control != priv->line_control) { in pl2303_set_termios()
929 control = priv->line_control; in pl2303_set_termios()
930 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_set_termios()
933 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_set_termios()
937 if (spriv->quirks & PL2303_QUIRK_LEGACY) { in pl2303_set_termios()
938 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); in pl2303_set_termios()
939 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { in pl2303_set_termios()
940 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, in pl2303_set_termios()
944 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); in pl2303_set_termios()
946 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { in pl2303_set_termios()
947 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { in pl2303_set_termios()
948 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, in pl2303_set_termios()
952 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); in pl2303_set_termios()
955 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { in pl2303_set_termios()
956 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, in pl2303_set_termios()
960 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); in pl2303_set_termios()
973 spin_lock_irqsave(&priv->lock, flags); in pl2303_dtr_rts()
975 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); in pl2303_dtr_rts()
977 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); in pl2303_dtr_rts()
978 control = priv->line_control; in pl2303_dtr_rts()
979 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_dtr_rts()
987 usb_kill_urb(port->interrupt_in_urb); in pl2303_close()
993 struct usb_serial *serial = port->serial; in pl2303_open() local
994 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_open()
997 if (spriv->quirks & PL2303_QUIRK_LEGACY) { in pl2303_open()
998 usb_clear_halt(serial->dev, port->write_urb->pipe); in pl2303_open()
999 usb_clear_halt(serial->dev, port->read_urb->pipe); in pl2303_open()
1002 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { in pl2303_open()
1003 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, in pl2303_open()
1007 pl2303_vendor_write(serial, 8, 0); in pl2303_open()
1008 pl2303_vendor_write(serial, 9, 0); in pl2303_open()
1016 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); in pl2303_open()
1018 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", in pl2303_open()
1025 usb_kill_urb(port->interrupt_in_urb); in pl2303_open()
1035 struct usb_serial_port *port = tty->driver_data; in pl2303_tiocmset()
1041 spin_lock_irqsave(&priv->lock, flags); in pl2303_tiocmset()
1043 priv->line_control |= CONTROL_RTS; in pl2303_tiocmset()
1045 priv->line_control |= CONTROL_DTR; in pl2303_tiocmset()
1047 priv->line_control &= ~CONTROL_RTS; in pl2303_tiocmset()
1049 priv->line_control &= ~CONTROL_DTR; in pl2303_tiocmset()
1050 control = priv->line_control; in pl2303_tiocmset()
1051 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_tiocmset()
1062 struct usb_serial_port *port = tty->driver_data; in pl2303_tiocmget()
1069 spin_lock_irqsave(&priv->lock, flags); in pl2303_tiocmget()
1070 mcr = priv->line_control; in pl2303_tiocmget()
1071 status = priv->line_status; in pl2303_tiocmget()
1072 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_tiocmget()
1081 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); in pl2303_tiocmget()
1090 if (priv->line_status & UART_DCD) in pl2303_carrier_raised()
1098 struct usb_serial *serial = port->serial; in pl2303_set_break() local
1099 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_set_break()
1100 u16 state; in pl2303_set_break() local
1103 if (spriv->quirks & PL2303_QUIRK_NO_BREAK_GETLINE) in pl2303_set_break()
1104 return -ENOTTY; in pl2303_set_break()
1107 state = BREAK_ON; in pl2303_set_break()
1109 state = BREAK_OFF; in pl2303_set_break()
1111 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, in pl2303_set_break()
1112 state == BREAK_OFF ? "off" : "on"); in pl2303_set_break()
1114 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), in pl2303_set_break()
1115 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, in pl2303_set_break()
1118 dev_err(&port->dev, "error sending break = %d\n", result); in pl2303_set_break()
1125 static int pl2303_break_ctl(struct tty_struct *tty, int state) in pl2303_break_ctl() argument
1127 struct usb_serial_port *port = tty->driver_data; in pl2303_break_ctl()
1129 return pl2303_set_break(port, state); in pl2303_break_ctl()
1136 struct usb_serial *serial = port->serial; in pl2303_update_line_status() local
1137 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); in pl2303_update_line_status()
1145 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) in pl2303_update_line_status()
1154 spin_lock_irqsave(&priv->lock, flags); in pl2303_update_line_status()
1155 delta = priv->line_status ^ status; in pl2303_update_line_status()
1156 priv->line_status = status; in pl2303_update_line_status()
1157 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_update_line_status()
1164 port->icount.cts++; in pl2303_update_line_status()
1166 port->icount.dsr++; in pl2303_update_line_status()
1168 port->icount.rng++; in pl2303_update_line_status()
1170 port->icount.dcd++; in pl2303_update_line_status()
1171 tty = tty_port_tty_get(&port->port); in pl2303_update_line_status()
1179 wake_up_interruptible(&port->port.delta_msr_wait); in pl2303_update_line_status()
1185 struct usb_serial_port *port = urb->context; in pl2303_read_int_callback()
1186 unsigned char *data = urb->transfer_buffer; in pl2303_read_int_callback()
1187 unsigned int actual_length = urb->actual_length; in pl2303_read_int_callback()
1188 int status = urb->status; in pl2303_read_int_callback()
1195 case -ECONNRESET: in pl2303_read_int_callback()
1196 case -ENOENT: in pl2303_read_int_callback()
1197 case -ESHUTDOWN: in pl2303_read_int_callback()
1199 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", in pl2303_read_int_callback()
1203 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", in pl2303_read_int_callback()
1208 usb_serial_debug_data(&port->dev, __func__, in pl2303_read_int_callback()
1209 urb->actual_length, urb->transfer_buffer); in pl2303_read_int_callback()
1216 dev_err(&port->dev, in pl2303_read_int_callback()
1217 "%s - usb_submit_urb failed with result %d\n", in pl2303_read_int_callback()
1224 struct usb_serial_port *port = urb->context; in pl2303_process_read_urb()
1226 unsigned char *data = urb->transfer_buffer; in pl2303_process_read_urb()
1233 spin_lock_irqsave(&priv->lock, flags); in pl2303_process_read_urb()
1234 line_status = priv->line_status; in pl2303_process_read_urb()
1235 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; in pl2303_process_read_urb()
1236 spin_unlock_irqrestore(&priv->lock, flags); in pl2303_process_read_urb()
1238 if (!urb->actual_length) in pl2303_process_read_urb()
1253 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, in pl2303_process_read_urb()
1257 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); in pl2303_process_read_urb()
1259 if (port->sysrq) { in pl2303_process_read_urb()
1260 for (i = 0; i < urb->actual_length; ++i) in pl2303_process_read_urb()
1262 tty_insert_flip_char(&port->port, data[i], in pl2303_process_read_urb()
1265 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, in pl2303_process_read_urb()
1266 urb->actual_length); in pl2303_process_read_urb()
1269 tty_flip_buffer_push(&port->port); in pl2303_process_read_urb()
1307 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");