1 // SPDX-License-Identifier: GPL-2.0
6  * Copyright (C) 2010-2021 Johan Hovold (johan@kernel.org)
10  * control thanks to Munir Nassar nassarmu@real-time.com
55 	{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
56 	{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
57 	{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
58 	{ USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59 	{ USB_DEVICE(0x04BF, 0x1301) }, /* TDK Corporation NC0110013M - Network Controller */
60 	{ USB_DEVICE(0x04BF, 0x1303) }, /* TDK Corporation MM0110113M - i3 Micro Module */
63 	{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
65 	{ USB_DEVICE(0x0908, 0x0070) }, /* Siemens SCALANCE LPE-9000 USB Serial Console */
69 	{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
74 	{ USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
76 	{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
78 	{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
82 	{ USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
83 	{ USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
85 	{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
89 	{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
103 	{ USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
114 	{ USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
115 	{ USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
116 	{ USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
120 	{ USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
125 	{ USB_DEVICE(0x10C4, 0x82AA) }, /* Silicon Labs IFS-USB-DATACABLE used with Quint UPS */
126 	{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
134 	{ USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
135 	{ USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
138 	{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
146 	{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
147 	{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
150 	{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
151 	{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
152 	{ USB_DEVICE(0x10C4, 0x87ED) }, /* IMST USB-Stick for Smart Meter */
153 	{ USB_DEVICE(0x10C4, 0x8856) },	/* CEL EM357 ZigBee USB Stick - LR */
166 	{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
172 	{ USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
174 	{ USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
187 	{ USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
189 	{ USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
190 	{ USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
191 	{ USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
192 	{ USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
193 	{ USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
194 	{ USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
195 	{ USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
199 	{ USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
200 …{ USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Powe…
201 	{ USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
202 …{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Lo…
203 	{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
204 	{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
207 	{ USB_DEVICE(0x17A8, 0x0101) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Int Ant) */
208 	{ USB_DEVICE(0x17A8, 0x0102) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Ext Ant) */
211 	{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
222 	{ USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */
228 	{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
230 	{ USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
247 	{ USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
248 	{ USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
251 	{ USB_DEVICE(0x2184, 0x0030) }, /* GW Instek GDM-834x Digital Multimeter */
253 	{ USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
254 	{ USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
255 	{ USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
452  * CP210X_PURGE - 16 bits passed in wValue of USB request.
579 …* See https://www.silabs.com/documents/public/application-notes/an978-cp210x-usb-to-uart-api-speci…
634 	cur_altsetting = serial->interface->cur_altsetting;  in cp210x_interface_num()
636 	return cur_altsetting->desc.bInterfaceNumber;  in cp210x_interface_num()
640  * Reads a variable-sized block of CP210X_ registers, identified by req.
646 	struct usb_serial *serial = port->serial;  in cp210x_read_reg_block()
651 	result = usb_control_msg_recv(serial->dev, 0, req,  in cp210x_read_reg_block()
653 			port_priv->bInterfaceNumber, buf, bufsize,  in cp210x_read_reg_block()
656 		dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",  in cp210x_read_reg_block()
665  * Reads any 8-bit CP210X_ register identified by req.
673  * Reads a variable-sized vendor block of CP210X_ registers, identified by val.
681 	result = usb_control_msg_recv(serial->dev, 0, CP210X_VENDOR_SPECIFIC,  in cp210x_read_vendor_block()
685 		dev_err(&serial->interface->dev,  in cp210x_read_vendor_block()
695  * Writes any 16-bit CP210X_ register (req) whose value is passed
700 	struct usb_serial *serial = port->serial;  in cp210x_write_u16_reg()
704 	result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),  in cp210x_write_u16_reg()
706 			port_priv->bInterfaceNumber, NULL, 0,  in cp210x_write_u16_reg()
709 		dev_err(&port->dev, "failed set request 0x%x status: %d\n",  in cp210x_write_u16_reg()
717  * Writes a variable-sized block of CP210X_ registers, identified by req.
723 	struct usb_serial *serial = port->serial;  in cp210x_write_reg_block()
727 	result = usb_control_msg_send(serial->dev, 0, req,  in cp210x_write_reg_block()
729 			port_priv->bInterfaceNumber, buf, bufsize,  in cp210x_write_reg_block()
732 		dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",  in cp210x_write_reg_block()
741  * Writes any 32-bit CP210X_ register identified by req.
754  * Writes a variable-sized vendor block of CP210X_ registers, identified by val.
762 	result = usb_control_msg_send(serial->dev, 0, CP210X_VENDOR_SPECIFIC,  in cp210x_write_vendor_block()
766 		dev_err(&serial->interface->dev,  in cp210x_write_vendor_block()
783 		dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);  in cp210x_open()
798 	port_priv->event_mode = false;  in cp210x_open()
814 	/* Disabling the interface disables event-insertion mode. */  in cp210x_close()
815 	port_priv->event_mode = false;  in cp210x_close()
821 		port->icount.brk++;  in cp210x_process_lsr()
824 		port->icount.parity++;  in cp210x_process_lsr()
827 		port->icount.frame++;  in cp210x_process_lsr()
832 		port->icount.overrun++;  in cp210x_process_lsr()
833 		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);  in cp210x_process_lsr()
841 	switch (port_priv->event_state) {  in cp210x_process_char()
844 			port_priv->event_state = ES_ESCAPE;  in cp210x_process_char()
851 			dev_dbg(&port->dev, "%s - escape char\n", __func__);  in cp210x_process_char()
853 			port_priv->event_state = ES_DATA;  in cp210x_process_char()
856 			port_priv->event_state = ES_LSR_DATA_0;  in cp210x_process_char()
859 			port_priv->event_state = ES_LSR;  in cp210x_process_char()
862 			port_priv->event_state = ES_MSR;  in cp210x_process_char()
865 			dev_err(&port->dev, "malformed event 0x%02x\n", *ch);  in cp210x_process_char()
866 			port_priv->event_state = ES_DATA;  in cp210x_process_char()
871 		port_priv->lsr = *ch;  in cp210x_process_char()
872 		port_priv->event_state = ES_LSR_DATA_1;  in cp210x_process_char()
875 		dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n",  in cp210x_process_char()
876 				__func__, port_priv->lsr, *ch);  in cp210x_process_char()
877 		cp210x_process_lsr(port, port_priv->lsr, flag);  in cp210x_process_char()
878 		port_priv->event_state = ES_DATA;  in cp210x_process_char()
881 		dev_dbg(&port->dev, "%s - lsr = 0x%02x\n", __func__, *ch);  in cp210x_process_char()
882 		port_priv->lsr = *ch;  in cp210x_process_char()
883 		cp210x_process_lsr(port, port_priv->lsr, flag);  in cp210x_process_char()
884 		port_priv->event_state = ES_DATA;  in cp210x_process_char()
887 		dev_dbg(&port->dev, "%s - msr = 0x%02x\n", __func__, *ch);  in cp210x_process_char()
889 		port_priv->event_state = ES_DATA;  in cp210x_process_char()
898 	struct usb_serial_port *port = urb->context;  in cp210x_process_read_urb()
900 	unsigned char *ch = urb->transfer_buffer;  in cp210x_process_read_urb()
904 	if (!urb->actual_length)  in cp210x_process_read_urb()
907 	if (port_priv->event_mode) {  in cp210x_process_read_urb()
908 		for (i = 0; i < urb->actual_length; i++, ch++) {  in cp210x_process_read_urb()
914 			tty_insert_flip_char(&port->port, *ch, flag);  in cp210x_process_read_urb()
917 		tty_insert_flip_string(&port->port, ch, urb->actual_length);  in cp210x_process_read_urb()
919 	tty_flip_buffer_push(&port->port);  in cp210x_process_read_urb()
928 	struct usb_serial *serial = port->serial;  in cp210x_get_tx_queue_byte_count()
933 	result = usb_control_msg_recv(serial->dev, 0, CP210X_GET_COMM_STATUS,  in cp210x_get_tx_queue_byte_count()
935 			port_priv->bInterfaceNumber, &sts, sizeof(sts),  in cp210x_get_tx_queue_byte_count()
938 		dev_err(&port->dev, "failed to get comm status: %d\n", result);  in cp210x_get_tx_queue_byte_count()
1055 	struct usb_serial *serial = port->serial;  in cp210x_change_speed()
1059 	if (tty->termios.c_ospeed == 0)  in cp210x_change_speed()
1066 	baud = clamp(tty->termios.c_ospeed, priv->min_speed, priv->max_speed);  in cp210x_change_speed()
1068 	if (priv->use_actual_rate)  in cp210x_change_speed()
1073 	dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);  in cp210x_change_speed()
1075 		dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);  in cp210x_change_speed()
1077 			baud = old_termios->c_ospeed;  in cp210x_change_speed()
1087 	struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);  in cp210x_enable_event_mode()
1091 	if (port_priv->event_mode)  in cp210x_enable_event_mode()
1094 	if (priv->no_event_mode)  in cp210x_enable_event_mode()
1097 	port_priv->event_state = ES_DATA;  in cp210x_enable_event_mode()
1098 	port_priv->event_mode = true;  in cp210x_enable_event_mode()
1102 		dev_err(&port->dev, "failed to enable events: %d\n", ret);  in cp210x_enable_event_mode()
1103 		port_priv->event_mode = false;  in cp210x_enable_event_mode()
1112 	if (!port_priv->event_mode)  in cp210x_disable_event_mode()
1117 		dev_err(&port->dev, "failed to disable events: %d\n", ret);  in cp210x_disable_event_mode()
1121 	port_priv->event_mode = false;  in cp210x_disable_event_mode()
1128 	iflag_change = ((a->c_iflag ^ b->c_iflag) & (INPCK | IXON | IXOFF));  in cp210x_termios_change()
1129 	cc_change = a->c_cc[VSTART] != b->c_cc[VSTART] ||  in cp210x_termios_change()
1130 			a->c_cc[VSTOP] != b->c_cc[VSTOP];  in cp210x_termios_change()
1139 	struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);  in cp210x_set_flow_control()
1152 	if (priv->no_flow_control) {  in cp210x_set_flow_control()
1153 		tty->termios.c_cflag &= ~CRTSCTS;  in cp210x_set_flow_control()
1154 		tty->termios.c_iflag &= ~(IXON | IXOFF);  in cp210x_set_flow_control()
1157 	if (tty->termios.c_ospeed != 0 &&  in cp210x_set_flow_control()
1158 			old_termios && old_termios->c_ospeed != 0 &&  in cp210x_set_flow_control()
1159 			C_CRTSCTS(tty) == (old_termios->c_cflag & CRTSCTS) &&  in cp210x_set_flow_control()
1160 			I_IXON(tty) == (old_termios->c_iflag & IXON) &&  in cp210x_set_flow_control()
1161 			I_IXOFF(tty) == (old_termios->c_iflag & IXOFF) &&  in cp210x_set_flow_control()
1162 			START_CHAR(tty) == old_termios->c_cc[VSTART] &&  in cp210x_set_flow_control()
1163 			STOP_CHAR(tty) == old_termios->c_cc[VSTOP]) {  in cp210x_set_flow_control()
1176 			dev_err(&port->dev, "failed to set special chars: %d\n",  in cp210x_set_flow_control()
1181 	mutex_lock(&port_priv->mutex);  in cp210x_set_flow_control()
1183 	if (tty->termios.c_ospeed == 0) {  in cp210x_set_flow_control()
1184 		port_priv->dtr = false;  in cp210x_set_flow_control()
1185 		port_priv->rts = false;  in cp210x_set_flow_control()
1186 	} else if (old_termios && old_termios->c_ospeed == 0) {  in cp210x_set_flow_control()
1187 		port_priv->dtr = true;  in cp210x_set_flow_control()
1188 		port_priv->rts = true;  in cp210x_set_flow_control()
1203 	if (port_priv->dtr)  in cp210x_set_flow_control()
1211 		if (port_priv->rts)  in cp210x_set_flow_control()
1218 		if (port_priv->rts)  in cp210x_set_flow_control()
1239 	dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n", __func__,  in cp210x_set_flow_control()
1250 	port_priv->crtscts = crtscts;  in cp210x_set_flow_control()
1252 	mutex_unlock(&port_priv->mutex);  in cp210x_set_flow_control()
1259 	struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);  in cp210x_set_termios()
1263 	if (old_termios && !cp210x_termios_change(&tty->termios, old_termios) &&  in cp210x_set_termios()
1264 			tty->termios.c_ospeed != 0)  in cp210x_set_termios()
1267 	if (!old_termios || tty->termios.c_ospeed != old_termios->c_ospeed)  in cp210x_set_termios()
1270 	/* CP2101 only supports CS8, 1 stop bit and non-stick parity. */  in cp210x_set_termios()
1271 	if (priv->partnum == CP210X_PARTNUM_CP2101) {  in cp210x_set_termios()
1272 		tty->termios.c_cflag &= ~(CSIZE | CSTOPB | CMSPAR);  in cp210x_set_termios()
1273 		tty->termios.c_cflag |= CS8;  in cp210x_set_termios()
1315 		dev_err(&port->dev, "failed to set line control: %d\n", ret);  in cp210x_set_termios()
1320 	 * Enable event-insertion mode only if input parity checking is  in cp210x_set_termios()
1332 	struct usb_serial_port *port = tty->driver_data;  in cp210x_tiocmset()
1345 	mutex_lock(&port_priv->mutex);  in cp210x_tiocmset_port()
1348 		port_priv->rts = true;  in cp210x_tiocmset_port()
1353 		port_priv->dtr = true;  in cp210x_tiocmset_port()
1358 		port_priv->rts = false;  in cp210x_tiocmset_port()
1363 		port_priv->dtr = false;  in cp210x_tiocmset_port()
1369 	 * Use SET_FLOW to set DTR and enable/disable auto-RTS when hardware  in cp210x_tiocmset_port()
1372 	if (port_priv->crtscts && control & CONTROL_WRITE_RTS) {  in cp210x_tiocmset_port()
1382 		if (port_priv->dtr)  in cp210x_tiocmset_port()
1388 		if (port_priv->rts)  in cp210x_tiocmset_port()
1396 		dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n",  in cp210x_tiocmset_port()
1402 		dev_dbg(&port->dev, "%s - control = 0x%04x\n", __func__, control);  in cp210x_tiocmset_port()
1407 	mutex_unlock(&port_priv->mutex);  in cp210x_tiocmset_port()
1422 	struct usb_serial_port *port = tty->driver_data;  in cp210x_tiocmget()
1437 	dev_dbg(&port->dev, "%s - control = 0x%02x\n", __func__, control);  in cp210x_tiocmget()
1444 	struct usb_serial_port *port = tty->driver_data;  in cp210x_break_ctl()
1445 	struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);  in cp210x_break_ctl()
1448 	if (priv->partnum == CP210X_PARTNUM_CP2105) {  in cp210x_break_ctl()
1449 		if (cp210x_interface_num(port->serial) == 1)  in cp210x_break_ctl()
1450 			return -ENOTTY;  in cp210x_break_ctl()
1458 	dev_dbg(&port->dev, "%s - turning break %s\n", __func__,  in cp210x_break_ctl()
1474 	result = usb_autopm_get_interface(serial->interface);  in cp210x_gpio_get()
1478 	switch (priv->partnum) {  in cp210x_gpio_get()
1497 	usb_autopm_put_interface(serial->interface);  in cp210x_gpio_get()
1524 	result = usb_autopm_get_interface(serial->interface);  in cp210x_gpio_set()
1528 	switch (priv->partnum) {  in cp210x_gpio_set()
1547 		result = usb_control_msg(serial->dev,  in cp210x_gpio_set()
1548 					 usb_sndctrlpipe(serial->dev, 0),  in cp210x_gpio_set()
1557 	usb_autopm_put_interface(serial->interface);  in cp210x_gpio_set()
1560 		dev_err(&serial->interface->dev, "failed to set GPIO value: %d\n",  in cp210x_gpio_set()
1570 	return priv->gpio_input & BIT(gpio);  in cp210x_gpio_direction_get()
1578 	if (priv->partnum == CP210X_PARTNUM_CP2105) {  in cp210x_gpio_direction_input()
1580 		return -ENOTSUPP;  in cp210x_gpio_direction_input()
1583 	/* push-pull pins cannot be changed to be inputs */  in cp210x_gpio_direction_input()
1584 	if (priv->gpio_pushpull & BIT(gpio))  in cp210x_gpio_direction_input()
1585 		return -EINVAL;  in cp210x_gpio_direction_input()
1590 	priv->gpio_input |= BIT(gpio);  in cp210x_gpio_direction_input()
1601 	priv->gpio_input &= ~BIT(gpio);  in cp210x_gpio_direction_output()
1616 	    (priv->gpio_pushpull & BIT(gpio)))  in cp210x_gpio_set_config()
1620 	    !(priv->gpio_pushpull & BIT(gpio)))  in cp210x_gpio_set_config()
1623 	return -ENOTSUPP;  in cp210x_gpio_set_config()
1631 	struct device *dev = &serial->interface->dev;  in cp210x_gpio_init_valid_mask()
1632 	unsigned long altfunc_mask = priv->gpio_altfunc;  in cp210x_gpio_init_valid_mask()
1672 	/*  2 banks of GPIO - One for the pins taken from each serial port */  in cp2105_gpioconf_init()
1674 		priv->gc.ngpio = 2;  in cp2105_gpioconf_init()
1678 			priv->gpio_altfunc = 0xff;  in cp2105_gpioconf_init()
1683 		priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &  in cp2105_gpioconf_init()
1687 		priv->gc.ngpio = 3;  in cp2105_gpioconf_init()
1691 			priv->gpio_altfunc = 0xff;  in cp2105_gpioconf_init()
1696 		priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &  in cp2105_gpioconf_init()
1700 		return -ENODEV;  in cp2105_gpioconf_init()
1705 		priv->gpio_altfunc |= BIT(0);  in cp2105_gpioconf_init()
1708 		priv->gpio_altfunc |= BIT(1);  in cp2105_gpioconf_init()
1711 	priv->gpio_input = 0;  in cp2105_gpioconf_init()
1731 	priv->gc.ngpio = 4;  in cp2104_gpioconf_init()
1734 	priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &  in cp2104_gpioconf_init()
1743 		priv->gpio_altfunc |= BIT(0);  in cp2104_gpioconf_init()
1745 		priv->gpio_altfunc |= BIT(1);  in cp2104_gpioconf_init()
1747 		priv->gpio_altfunc |= BIT(2);  in cp2104_gpioconf_init()
1754 	for (i = 0; i < priv->gc.ngpio; ++i) {  in cp2104_gpioconf_init()
1756 		 * Set direction to "input" iff pin is open-drain and reset  in cp2104_gpioconf_init()
1759 		if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i)))  in cp2104_gpioconf_init()
1760 			priv->gpio_input |= BIT(i);  in cp2104_gpioconf_init()
1780 	priv->gc.ngpio = 16;  in cp2108_gpio_init()
1781 	priv->gpio_pushpull = le16_to_cpu(config.reset_state.gpio_mode_pb1);  in cp2108_gpio_init()
1788 	 * https://www.silabs.com/documents/public/data-sheets/cp2108-datasheet.pdf  in cp2108_gpio_init()
1796 			priv->gpio_altfunc |= BIT(i * 4);  in cp2108_gpio_init()
1798 			priv->gpio_altfunc |= BIT((i * 4) + 1);  in cp2108_gpio_init()
1800 			priv->gpio_altfunc |= BIT((i * 4) + 2);  in cp2108_gpio_init()
1802 			priv->gpio_altfunc |= BIT((i * 4) + 3);  in cp2108_gpio_init()
1809 	for (i = 0; i < priv->gc.ngpio; ++i) {  in cp2108_gpio_init()
1811 		 * Set direction to "input" iff pin is open-drain and reset  in cp2108_gpio_init()
1814 		if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i)))  in cp2108_gpio_init()
1815 			priv->gpio_input |= BIT(i);  in cp2108_gpio_init()
1839 … https://www.silabs.com/community/interface/knowledge-base.entry.html/2017/03/31/cp2102n_setconfig…  in cp2102n_gpioconf_init()
1843 		return -ENOMEM;  in cp2102n_gpioconf_init()
1864 		return -ENOTSUPP;  in cp2102n_gpioconf_init()
1866 	priv->gc.ngpio = 4;  in cp2102n_gpioconf_init()
1870 	 * the direction of an open-drain pin.  in cp2102n_gpioconf_init()
1874 	/* 0 indicates open-drain mode, 1 is push-pull */  in cp2102n_gpioconf_init()
1875 	priv->gpio_pushpull = (gpio_pushpull >> 3) & 0x0f;  in cp2102n_gpioconf_init()
1878 	if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN20) {  in cp2102n_gpioconf_init()
1881 			priv->gpio_altfunc |= BIT(0);  in cp2102n_gpioconf_init()
1883 			priv->gpio_altfunc |= BIT(1);  in cp2102n_gpioconf_init()
1885 			priv->gpio_altfunc |= BIT(2);  in cp2102n_gpioconf_init()
1887 			priv->gpio_altfunc |= BIT(3);  in cp2102n_gpioconf_init()
1889 		priv->gpio_altfunc = (gpio_ctrl >> 2) & 0x0f;  in cp2102n_gpioconf_init()
1892 	if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN28) {  in cp2102n_gpioconf_init()
1894 		 * For the QFN28 package, GPIO4-6 are controlled by  in cp2102n_gpioconf_init()
1900 		priv->gc.ngpio = 7;  in cp2102n_gpioconf_init()
1902 		priv->gpio_pushpull |= (gpio_pushpull & 7) << 4;  in cp2102n_gpioconf_init()
1907 	 * it only knows open-drain and push-pull modes which is set at  in cp2102n_gpioconf_init()
1908 	 * factory. An open-drain pin can function both as an  in cp2102n_gpioconf_init()
1909 	 * input or an output. We emulate input mode for open-drain pins  in cp2102n_gpioconf_init()
1911 	 * push-pull pins to be set as an input.  in cp2102n_gpioconf_init()
1913 	for (i = 0; i < priv->gc.ngpio; ++i) {  in cp2102n_gpioconf_init()
1915 		 * Set direction to "input" iff pin is open-drain and reset  in cp2102n_gpioconf_init()
1918 		if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i)))  in cp2102n_gpioconf_init()
1919 			priv->gpio_input |= BIT(i);  in cp2102n_gpioconf_init()
1930 	switch (priv->partnum) {  in cp210x_gpio_init()
1958 	priv->gc.label = "cp210x";  in cp210x_gpio_init()
1959 	priv->gc.get_direction = cp210x_gpio_direction_get;  in cp210x_gpio_init()
1960 	priv->gc.direction_input = cp210x_gpio_direction_input;  in cp210x_gpio_init()
1961 	priv->gc.direction_output = cp210x_gpio_direction_output;  in cp210x_gpio_init()
1962 	priv->gc.get = cp210x_gpio_get;  in cp210x_gpio_init()
1963 	priv->gc.set = cp210x_gpio_set;  in cp210x_gpio_init()
1964 	priv->gc.set_config = cp210x_gpio_set_config;  in cp210x_gpio_init()
1965 	priv->gc.init_valid_mask = cp210x_gpio_init_valid_mask;  in cp210x_gpio_init()
1966 	priv->gc.owner = THIS_MODULE;  in cp210x_gpio_init()
1967 	priv->gc.parent = &serial->interface->dev;  in cp210x_gpio_init()
1968 	priv->gc.base = -1;  in cp210x_gpio_init()
1969 	priv->gc.can_sleep = true;  in cp210x_gpio_init()
1971 	result = gpiochip_add_data(&priv->gc, serial);  in cp210x_gpio_init()
1973 		priv->gpio_registered = true;  in cp210x_gpio_init()
1982 	if (priv->gpio_registered) {  in cp210x_gpio_remove()
1983 		gpiochip_remove(&priv->gc);  in cp210x_gpio_remove()
1984 		priv->gpio_registered = false;  in cp210x_gpio_remove()
2004 	struct usb_serial *serial = port->serial;  in cp210x_port_probe()
2009 		return -ENOMEM;  in cp210x_port_probe()
2011 	port_priv->bInterfaceNumber = cp210x_interface_num(serial);  in cp210x_port_probe()
2012 	mutex_init(&port_priv->mutex);  in cp210x_port_probe()
2034 	switch (priv->partnum) {  in cp210x_init_max_speed()
2069 	priv->min_speed = min;  in cp210x_init_max_speed()
2070 	priv->max_speed = max;  in cp210x_init_max_speed()
2071 	priv->use_actual_rate = use_actual_rate;  in cp210x_init_max_speed()
2084 	 * Some (possibly counterfeit) CP2102 do not support event-insertion  in cp2102_determine_quirks()
2087 	 * two-byte part-number request.  in cp2102_determine_quirks()
2089 	ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),  in cp2102_determine_quirks()
2093 		dev_dbg(&serial->interface->dev,  in cp2102_determine_quirks()
2094 				"device does not support event-insertion mode\n");  in cp2102_determine_quirks()
2095 		priv->no_event_mode = true;  in cp2102_determine_quirks()
2112 	dev_dbg(&serial->interface->dev, "%s - %d.%d.%d\n", __func__,  in cp210x_get_fw_version()
2115 	priv->fw_version = ver[0] << 16 | ver[1] << 8 | ver[2];  in cp210x_get_fw_version()
2126 			CP210X_GET_PARTNUM, &priv->partnum,  in cp210x_determine_type()
2127 			sizeof(priv->partnum));  in cp210x_determine_type()
2129 		dev_warn(&serial->interface->dev,  in cp210x_determine_type()
2131 		priv->partnum = CP210X_PARTNUM_UNKNOWN;  in cp210x_determine_type()
2135 	dev_dbg(&serial->interface->dev, "partnum = 0x%02x\n", priv->partnum);  in cp210x_determine_type()
2137 	switch (priv->partnum) {  in cp210x_determine_type()
2151 		if (priv->fw_version <= 0x10004)  in cp210x_determine_type()
2152 			priv->no_flow_control = true;  in cp210x_determine_type()
2166 		return -ENOMEM;  in cp210x_attach()
2175 		dev_err(&serial->interface->dev, "GPIO initialisation failed: %d\n",  in cp210x_attach()