1 // SPDX-License-Identifier: GPL-2.0
3 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
5 * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
7 * Support to set flow control line levels using TIOCMGET and TIOCMSET
8 * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
9 * control thanks to Munir Nassar nassarmu@real-time.com
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/slab.h>
16 #include <linux/tty.h>
17 #include <linux/tty_flip.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/usb.h>
21 #include <linux/uaccess.h>
22 #include <linux/usb/serial.h>
23 #include <linux/gpio/driver.h>
24 #include <linux/bitops.h>
25 #include <linux/mutex.h>
27 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*);
33 static void cp210x_close(struct usb_serial_port
*);
34 static void cp210x_get_termios(struct tty_struct
*, struct usb_serial_port
*);
35 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
36 tcflag_t
*cflagp
, unsigned int *baudp
);
37 static void cp210x_change_speed(struct tty_struct
*, struct usb_serial_port
*,
39 static void cp210x_set_termios(struct tty_struct
*, struct usb_serial_port
*,
41 static bool cp210x_tx_empty(struct usb_serial_port
*port
);
42 static int cp210x_tiocmget(struct tty_struct
*);
43 static int cp210x_tiocmset(struct tty_struct
*, unsigned int, unsigned int);
44 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
45 unsigned int, unsigned int);
46 static void cp210x_break_ctl(struct tty_struct
*, int);
47 static int cp210x_attach(struct usb_serial
*);
48 static void cp210x_disconnect(struct usb_serial
*);
49 static void cp210x_release(struct usb_serial
*);
50 static int cp210x_port_probe(struct usb_serial_port
*);
51 static int cp210x_port_remove(struct usb_serial_port
*);
52 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
);
53 static void cp210x_process_read_urb(struct urb
*urb
);
54 static void cp210x_enable_event_mode(struct usb_serial_port
*port
);
55 static void cp210x_disable_event_mode(struct usb_serial_port
*port
);
57 static const struct usb_device_id id_table
[] = {
58 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
59 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
60 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
61 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
62 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
63 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
64 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
65 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
66 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
67 { USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
68 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
69 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
70 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
71 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
72 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
73 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
74 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
75 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
76 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
77 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
78 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
79 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
80 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
81 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
82 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
83 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
84 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
85 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
86 { USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
87 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
88 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
89 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
90 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
91 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
92 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
93 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
94 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
95 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
96 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
97 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
98 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
99 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
100 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
101 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
102 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
103 { USB_DEVICE(0x10C4, 0x817C) }, /* CESINEL MEDCAL N Power Quality Monitor */
104 { USB_DEVICE(0x10C4, 0x817D) }, /* CESINEL MEDCAL NT Power Quality Monitor */
105 { USB_DEVICE(0x10C4, 0x817E) }, /* CESINEL MEDCAL S Power Quality Monitor */
106 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
107 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
108 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
109 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
110 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
111 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
112 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
113 { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */
114 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
115 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
116 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
117 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
118 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
119 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
120 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
121 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
122 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
123 { USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
124 { USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
125 { USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
126 { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */
127 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
128 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
129 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
130 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
131 { USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
132 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
133 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
134 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
135 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
136 { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
137 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
138 { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */
139 { USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */
140 { USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */
141 { USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */
142 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
143 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
144 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
145 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
146 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
147 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
148 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
149 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
150 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
151 { USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
152 { USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
153 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
154 { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */
155 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
156 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
157 { USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
158 { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
159 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
160 { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
161 { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
162 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
163 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
164 { USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */
165 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
166 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
167 { USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */
168 { USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */
169 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
170 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
171 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
172 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
173 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
174 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
175 { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
176 { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
177 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
178 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
179 { USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */
180 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
181 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
182 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
183 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
184 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
185 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
186 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
187 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
188 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
189 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
190 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
191 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
192 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
193 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
194 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
195 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
196 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
197 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
198 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
199 { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */
200 { USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */
201 { USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */
202 { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */
203 { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */
204 { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
205 { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
206 { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
207 { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
208 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
209 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
210 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
211 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
212 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
213 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
214 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
215 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
216 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
217 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
218 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
219 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
220 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
221 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
222 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
223 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
224 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
225 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
226 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
227 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
228 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
229 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
230 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
231 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
232 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
233 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
234 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
235 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
236 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
237 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
238 { USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */
239 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
240 { } /* Terminating Entry */
243 MODULE_DEVICE_TABLE(usb
, id_table
);
245 struct cp210x_serial_private
{
246 #ifdef CONFIG_GPIOLIB
248 bool gpio_registered
;
256 bool use_actual_rate
;
259 enum cp210x_event_state
{
268 struct cp210x_port_private
{
270 bool has_swapped_line_ctl
;
272 enum cp210x_event_state event_state
;
276 static struct usb_serial_driver cp210x_device
= {
278 .owner
= THIS_MODULE
,
281 .id_table
= id_table
,
284 .bulk_out_size
= 256,
286 .close
= cp210x_close
,
287 .break_ctl
= cp210x_break_ctl
,
288 .set_termios
= cp210x_set_termios
,
289 .tx_empty
= cp210x_tx_empty
,
290 .throttle
= usb_serial_generic_throttle
,
291 .unthrottle
= usb_serial_generic_unthrottle
,
292 .tiocmget
= cp210x_tiocmget
,
293 .tiocmset
= cp210x_tiocmset
,
294 .get_icount
= usb_serial_generic_get_icount
,
295 .attach
= cp210x_attach
,
296 .disconnect
= cp210x_disconnect
,
297 .release
= cp210x_release
,
298 .port_probe
= cp210x_port_probe
,
299 .port_remove
= cp210x_port_remove
,
300 .dtr_rts
= cp210x_dtr_rts
,
301 .process_read_urb
= cp210x_process_read_urb
,
304 static struct usb_serial_driver
* const serial_drivers
[] = {
308 /* Config request types */
309 #define REQTYPE_HOST_TO_INTERFACE 0x41
310 #define REQTYPE_INTERFACE_TO_HOST 0xc1
311 #define REQTYPE_HOST_TO_DEVICE 0x40
312 #define REQTYPE_DEVICE_TO_HOST 0xc0
314 /* Config request codes */
315 #define CP210X_IFC_ENABLE 0x00
316 #define CP210X_SET_BAUDDIV 0x01
317 #define CP210X_GET_BAUDDIV 0x02
318 #define CP210X_SET_LINE_CTL 0x03
319 #define CP210X_GET_LINE_CTL 0x04
320 #define CP210X_SET_BREAK 0x05
321 #define CP210X_IMM_CHAR 0x06
322 #define CP210X_SET_MHS 0x07
323 #define CP210X_GET_MDMSTS 0x08
324 #define CP210X_SET_XON 0x09
325 #define CP210X_SET_XOFF 0x0A
326 #define CP210X_SET_EVENTMASK 0x0B
327 #define CP210X_GET_EVENTMASK 0x0C
328 #define CP210X_SET_CHAR 0x0D
329 #define CP210X_GET_CHARS 0x0E
330 #define CP210X_GET_PROPS 0x0F
331 #define CP210X_GET_COMM_STATUS 0x10
332 #define CP210X_RESET 0x11
333 #define CP210X_PURGE 0x12
334 #define CP210X_SET_FLOW 0x13
335 #define CP210X_GET_FLOW 0x14
336 #define CP210X_EMBED_EVENTS 0x15
337 #define CP210X_GET_EVENTSTATE 0x16
338 #define CP210X_SET_CHARS 0x19
339 #define CP210X_GET_BAUDRATE 0x1D
340 #define CP210X_SET_BAUDRATE 0x1E
341 #define CP210X_VENDOR_SPECIFIC 0xFF
343 /* CP210X_IFC_ENABLE */
344 #define UART_ENABLE 0x0001
345 #define UART_DISABLE 0x0000
347 /* CP210X_(SET|GET)_BAUDDIV */
348 #define BAUD_RATE_GEN_FREQ 0x384000
350 /* CP210X_(SET|GET)_LINE_CTL */
351 #define BITS_DATA_MASK 0X0f00
352 #define BITS_DATA_5 0X0500
353 #define BITS_DATA_6 0X0600
354 #define BITS_DATA_7 0X0700
355 #define BITS_DATA_8 0X0800
356 #define BITS_DATA_9 0X0900
358 #define BITS_PARITY_MASK 0x00f0
359 #define BITS_PARITY_NONE 0x0000
360 #define BITS_PARITY_ODD 0x0010
361 #define BITS_PARITY_EVEN 0x0020
362 #define BITS_PARITY_MARK 0x0030
363 #define BITS_PARITY_SPACE 0x0040
365 #define BITS_STOP_MASK 0x000f
366 #define BITS_STOP_1 0x0000
367 #define BITS_STOP_1_5 0x0001
368 #define BITS_STOP_2 0x0002
370 /* CP210X_SET_BREAK */
371 #define BREAK_ON 0x0001
372 #define BREAK_OFF 0x0000
374 /* CP210X_(SET_MHS|GET_MDMSTS) */
375 #define CONTROL_DTR 0x0001
376 #define CONTROL_RTS 0x0002
377 #define CONTROL_CTS 0x0010
378 #define CONTROL_DSR 0x0020
379 #define CONTROL_RING 0x0040
380 #define CONTROL_DCD 0x0080
381 #define CONTROL_WRITE_DTR 0x0100
382 #define CONTROL_WRITE_RTS 0x0200
384 /* CP210X_VENDOR_SPECIFIC values */
385 #define CP210X_READ_2NCONFIG 0x000E
386 #define CP210X_READ_LATCH 0x00C2
387 #define CP210X_GET_PARTNUM 0x370B
388 #define CP210X_GET_PORTCONFIG 0x370C
389 #define CP210X_GET_DEVICEMODE 0x3711
390 #define CP210X_WRITE_LATCH 0x37E1
392 /* Part number definitions */
393 #define CP210X_PARTNUM_CP2101 0x01
394 #define CP210X_PARTNUM_CP2102 0x02
395 #define CP210X_PARTNUM_CP2103 0x03
396 #define CP210X_PARTNUM_CP2104 0x04
397 #define CP210X_PARTNUM_CP2105 0x05
398 #define CP210X_PARTNUM_CP2108 0x08
399 #define CP210X_PARTNUM_CP2102N_QFN28 0x20
400 #define CP210X_PARTNUM_CP2102N_QFN24 0x21
401 #define CP210X_PARTNUM_CP2102N_QFN20 0x22
402 #define CP210X_PARTNUM_UNKNOWN 0xFF
404 /* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
405 struct cp210x_comm_status
{
407 __le32 ulHoldReasons
;
408 __le32 ulAmountInInQueue
;
409 __le32 ulAmountInOutQueue
;
411 u8 bWaitForImmediate
;
416 * CP210X_PURGE - 16 bits passed in wValue of USB request.
417 * SiLabs app note AN571 gives a strange description of the 4 bits:
418 * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
419 * writing 1 to all, however, purges cp2108 well enough to avoid the hang.
421 #define PURGE_ALL 0x000f
423 /* CP210X_EMBED_EVENTS */
424 #define CP210X_ESCCHAR 0xec
426 #define CP210X_LSR_OVERRUN BIT(1)
427 #define CP210X_LSR_PARITY BIT(2)
428 #define CP210X_LSR_FRAME BIT(3)
429 #define CP210X_LSR_BREAK BIT(4)
432 /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
433 struct cp210x_flow_ctl
{
434 __le32 ulControlHandshake
;
435 __le32 ulFlowReplace
;
440 /* cp210x_flow_ctl::ulControlHandshake */
441 #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
442 #define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
443 #define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
444 #define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
445 #define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
446 #define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
448 /* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */
449 #define CP210X_SERIAL_DTR_INACTIVE 0
450 #define CP210X_SERIAL_DTR_ACTIVE 1
451 #define CP210X_SERIAL_DTR_FLOW_CTL 2
453 /* cp210x_flow_ctl::ulFlowReplace */
454 #define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
455 #define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
456 #define CP210X_SERIAL_ERROR_CHAR BIT(2)
457 #define CP210X_SERIAL_NULL_STRIPPING BIT(3)
458 #define CP210X_SERIAL_BREAK_CHAR BIT(4)
459 #define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
460 #define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6)
461 #define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
463 /* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */
464 #define CP210X_SERIAL_RTS_INACTIVE 0
465 #define CP210X_SERIAL_RTS_ACTIVE 1
466 #define CP210X_SERIAL_RTS_FLOW_CTL 2
468 /* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */
469 struct cp210x_pin_mode
{
474 #define CP210X_PIN_MODE_MODEM 0
475 #define CP210X_PIN_MODE_GPIO BIT(0)
478 * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes
479 * on a CP2105 chip. Structure needs padding due to unused/unspecified bytes.
481 struct cp210x_dual_port_config
{
486 __le16 suspend_state
;
493 * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xd bytes
494 * on a CP2104 chip. Structure needs padding due to unused/unspecified bytes.
496 struct cp210x_single_port_config
{
501 __le16 suspend_state
;
506 #define CP210X_SCI_GPIO_MODE_OFFSET 9
507 #define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9)
509 #define CP210X_ECI_GPIO_MODE_OFFSET 2
510 #define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2)
512 #define CP210X_GPIO_MODE_OFFSET 8
513 #define CP210X_GPIO_MODE_MASK GENMASK(11, 8)
515 /* CP2105 port configuration values */
516 #define CP2105_GPIO0_TXLED_MODE BIT(0)
517 #define CP2105_GPIO1_RXLED_MODE BIT(1)
518 #define CP2105_GPIO1_RS485_MODE BIT(2)
520 /* CP2104 port configuration values */
521 #define CP2104_GPIO0_TXLED_MODE BIT(0)
522 #define CP2104_GPIO1_RXLED_MODE BIT(1)
523 #define CP2104_GPIO2_RS485_MODE BIT(2)
525 /* CP2102N configuration array indices */
526 #define CP210X_2NCONFIG_CONFIG_VERSION_IDX 2
527 #define CP210X_2NCONFIG_GPIO_MODE_IDX 581
528 #define CP210X_2NCONFIG_GPIO_RSTLATCH_IDX 587
529 #define CP210X_2NCONFIG_GPIO_CONTROL_IDX 600
531 /* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */
532 struct cp210x_gpio_write
{
538 * Helper to get interface number when we only have struct usb_serial.
540 static u8
cp210x_interface_num(struct usb_serial
*serial
)
542 struct usb_host_interface
*cur_altsetting
;
544 cur_altsetting
= serial
->interface
->cur_altsetting
;
546 return cur_altsetting
->desc
.bInterfaceNumber
;
550 * Reads a variable-sized block of CP210X_ registers, identified by req.
551 * Returns data into buf in native USB byte order.
553 static int cp210x_read_reg_block(struct usb_serial_port
*port
, u8 req
,
554 void *buf
, int bufsize
)
556 struct usb_serial
*serial
= port
->serial
;
557 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
561 dmabuf
= kmalloc(bufsize
, GFP_KERNEL
);
564 * FIXME Some callers don't bother to check for error,
565 * at least give them consistent junk until they are fixed
567 memset(buf
, 0, bufsize
);
571 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
572 req
, REQTYPE_INTERFACE_TO_HOST
, 0,
573 port_priv
->bInterfaceNumber
, dmabuf
, bufsize
,
574 USB_CTRL_SET_TIMEOUT
);
575 if (result
== bufsize
) {
576 memcpy(buf
, dmabuf
, bufsize
);
579 dev_err(&port
->dev
, "failed get req 0x%x size %d status: %d\n",
580 req
, bufsize
, result
);
585 * FIXME Some callers don't bother to check for error,
586 * at least give them consistent junk until they are fixed
588 memset(buf
, 0, bufsize
);
597 * Reads any 32-bit CP210X_ register identified by req.
599 static int cp210x_read_u32_reg(struct usb_serial_port
*port
, u8 req
, u32
*val
)
604 err
= cp210x_read_reg_block(port
, req
, &le32_val
, sizeof(le32_val
));
607 * FIXME Some callers don't bother to check for error,
608 * at least give them consistent junk until they are fixed
614 *val
= le32_to_cpu(le32_val
);
620 * Reads any 16-bit CP210X_ register identified by req.
622 static int cp210x_read_u16_reg(struct usb_serial_port
*port
, u8 req
, u16
*val
)
627 err
= cp210x_read_reg_block(port
, req
, &le16_val
, sizeof(le16_val
));
631 *val
= le16_to_cpu(le16_val
);
637 * Reads any 8-bit CP210X_ register identified by req.
639 static int cp210x_read_u8_reg(struct usb_serial_port
*port
, u8 req
, u8
*val
)
641 return cp210x_read_reg_block(port
, req
, val
, sizeof(*val
));
645 * Reads a variable-sized vendor block of CP210X_ registers, identified by val.
646 * Returns data into buf in native USB byte order.
648 static int cp210x_read_vendor_block(struct usb_serial
*serial
, u8 type
, u16 val
,
649 void *buf
, int bufsize
)
654 dmabuf
= kmalloc(bufsize
, GFP_KERNEL
);
658 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
659 CP210X_VENDOR_SPECIFIC
, type
, val
,
660 cp210x_interface_num(serial
), dmabuf
, bufsize
,
661 USB_CTRL_GET_TIMEOUT
);
662 if (result
== bufsize
) {
663 memcpy(buf
, dmabuf
, bufsize
);
666 dev_err(&serial
->interface
->dev
,
667 "failed to get vendor val 0x%04x size %d: %d\n", val
,
679 * Writes any 16-bit CP210X_ register (req) whose value is passed
680 * entirely in the wValue field of the USB request.
682 static int cp210x_write_u16_reg(struct usb_serial_port
*port
, u8 req
, u16 val
)
684 struct usb_serial
*serial
= port
->serial
;
685 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
688 result
= usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
689 req
, REQTYPE_HOST_TO_INTERFACE
, val
,
690 port_priv
->bInterfaceNumber
, NULL
, 0,
691 USB_CTRL_SET_TIMEOUT
);
693 dev_err(&port
->dev
, "failed set request 0x%x status: %d\n",
701 * Writes a variable-sized block of CP210X_ registers, identified by req.
702 * Data in buf must be in native USB byte order.
704 static int cp210x_write_reg_block(struct usb_serial_port
*port
, u8 req
,
705 void *buf
, int bufsize
)
707 struct usb_serial
*serial
= port
->serial
;
708 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
712 dmabuf
= kmemdup(buf
, bufsize
, GFP_KERNEL
);
716 result
= usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
717 req
, REQTYPE_HOST_TO_INTERFACE
, 0,
718 port_priv
->bInterfaceNumber
, dmabuf
, bufsize
,
719 USB_CTRL_SET_TIMEOUT
);
723 if (result
== bufsize
) {
726 dev_err(&port
->dev
, "failed set req 0x%x size %d status: %d\n",
727 req
, bufsize
, result
);
736 * Writes any 32-bit CP210X_ register identified by req.
738 static int cp210x_write_u32_reg(struct usb_serial_port
*port
, u8 req
, u32 val
)
742 le32_val
= cpu_to_le32(val
);
744 return cp210x_write_reg_block(port
, req
, &le32_val
, sizeof(le32_val
));
747 #ifdef CONFIG_GPIOLIB
749 * Writes a variable-sized vendor block of CP210X_ registers, identified by val.
750 * Data in buf must be in native USB byte order.
752 static int cp210x_write_vendor_block(struct usb_serial
*serial
, u8 type
,
753 u16 val
, void *buf
, int bufsize
)
758 dmabuf
= kmemdup(buf
, bufsize
, GFP_KERNEL
);
762 result
= usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
763 CP210X_VENDOR_SPECIFIC
, type
, val
,
764 cp210x_interface_num(serial
), dmabuf
, bufsize
,
765 USB_CTRL_SET_TIMEOUT
);
769 if (result
== bufsize
) {
772 dev_err(&serial
->interface
->dev
,
773 "failed to set vendor val 0x%04x size %d: %d\n", val
,
784 * Detect CP2108 GET_LINE_CTL bug and activate workaround.
785 * Write a known good value 0x800, read it back.
786 * If it comes back swapped the bug is detected.
787 * Preserve the original register value.
789 static int cp210x_detect_swapped_line_ctl(struct usb_serial_port
*port
)
791 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
796 err
= cp210x_read_u16_reg(port
, CP210X_GET_LINE_CTL
, &line_ctl_save
);
800 err
= cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, 0x800);
804 err
= cp210x_read_u16_reg(port
, CP210X_GET_LINE_CTL
, &line_ctl_test
);
808 if (line_ctl_test
== 8) {
809 port_priv
->has_swapped_line_ctl
= true;
810 line_ctl_save
= swab16(line_ctl_save
);
813 return cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, line_ctl_save
);
817 * Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL)
818 * to workaround cp2108 bug and get correct value.
820 static int cp210x_get_line_ctl(struct usb_serial_port
*port
, u16
*ctl
)
822 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
825 err
= cp210x_read_u16_reg(port
, CP210X_GET_LINE_CTL
, ctl
);
829 /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
830 if (port_priv
->has_swapped_line_ctl
)
836 static int cp210x_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
838 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
841 result
= cp210x_write_u16_reg(port
, CP210X_IFC_ENABLE
, UART_ENABLE
);
843 dev_err(&port
->dev
, "%s - Unable to enable UART\n", __func__
);
847 /* Configure the termios structure */
848 cp210x_get_termios(tty
, port
);
851 /* The baud rate must be initialised on cp2104 */
852 cp210x_change_speed(tty
, port
, NULL
);
855 cp210x_enable_event_mode(port
);
858 result
= usb_serial_generic_open(tty
, port
);
865 cp210x_write_u16_reg(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
866 port_priv
->event_mode
= false;
871 static void cp210x_close(struct usb_serial_port
*port
)
873 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
875 usb_serial_generic_close(port
);
877 /* Clear both queues; cp2108 needs this to avoid an occasional hang */
878 cp210x_write_u16_reg(port
, CP210X_PURGE
, PURGE_ALL
);
880 cp210x_write_u16_reg(port
, CP210X_IFC_ENABLE
, UART_DISABLE
);
882 /* Disabling the interface disables event-insertion mode. */
883 port_priv
->event_mode
= false;
886 static void cp210x_process_lsr(struct usb_serial_port
*port
, unsigned char lsr
, char *flag
)
888 if (lsr
& CP210X_LSR_BREAK
) {
891 } else if (lsr
& CP210X_LSR_PARITY
) {
892 port
->icount
.parity
++;
894 } else if (lsr
& CP210X_LSR_FRAME
) {
895 port
->icount
.frame
++;
899 if (lsr
& CP210X_LSR_OVERRUN
) {
900 port
->icount
.overrun
++;
901 tty_insert_flip_char(&port
->port
, 0, TTY_OVERRUN
);
905 static bool cp210x_process_char(struct usb_serial_port
*port
, unsigned char *ch
, char *flag
)
907 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
909 switch (port_priv
->event_state
) {
911 if (*ch
== CP210X_ESCCHAR
) {
912 port_priv
->event_state
= ES_ESCAPE
;
919 dev_dbg(&port
->dev
, "%s - escape char\n", __func__
);
920 *ch
= CP210X_ESCCHAR
;
921 port_priv
->event_state
= ES_DATA
;
924 port_priv
->event_state
= ES_LSR_DATA_0
;
927 port_priv
->event_state
= ES_LSR
;
930 port_priv
->event_state
= ES_MSR
;
933 dev_err(&port
->dev
, "malformed event 0x%02x\n", *ch
);
934 port_priv
->event_state
= ES_DATA
;
939 port_priv
->lsr
= *ch
;
940 port_priv
->event_state
= ES_LSR_DATA_1
;
943 dev_dbg(&port
->dev
, "%s - lsr = 0x%02x, data = 0x%02x\n",
944 __func__
, port_priv
->lsr
, *ch
);
945 cp210x_process_lsr(port
, port_priv
->lsr
, flag
);
946 port_priv
->event_state
= ES_DATA
;
949 dev_dbg(&port
->dev
, "%s - lsr = 0x%02x\n", __func__
, *ch
);
950 port_priv
->lsr
= *ch
;
951 cp210x_process_lsr(port
, port_priv
->lsr
, flag
);
952 port_priv
->event_state
= ES_DATA
;
955 dev_dbg(&port
->dev
, "%s - msr = 0x%02x\n", __func__
, *ch
);
957 port_priv
->event_state
= ES_DATA
;
964 static void cp210x_process_read_urb(struct urb
*urb
)
966 struct usb_serial_port
*port
= urb
->context
;
967 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
968 unsigned char *ch
= urb
->transfer_buffer
;
972 if (!urb
->actual_length
)
975 if (port_priv
->event_mode
) {
976 for (i
= 0; i
< urb
->actual_length
; i
++, ch
++) {
979 if (cp210x_process_char(port
, ch
, &flag
))
982 tty_insert_flip_char(&port
->port
, *ch
, flag
);
985 tty_insert_flip_string(&port
->port
, ch
, urb
->actual_length
);
987 tty_flip_buffer_push(&port
->port
);
991 * Read how many bytes are waiting in the TX queue.
993 static int cp210x_get_tx_queue_byte_count(struct usb_serial_port
*port
,
996 struct usb_serial
*serial
= port
->serial
;
997 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
998 struct cp210x_comm_status
*sts
;
1001 sts
= kmalloc(sizeof(*sts
), GFP_KERNEL
);
1005 result
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
1006 CP210X_GET_COMM_STATUS
, REQTYPE_INTERFACE_TO_HOST
,
1007 0, port_priv
->bInterfaceNumber
, sts
, sizeof(*sts
),
1008 USB_CTRL_GET_TIMEOUT
);
1009 if (result
== sizeof(*sts
)) {
1010 *count
= le32_to_cpu(sts
->ulAmountInOutQueue
);
1013 dev_err(&port
->dev
, "failed to get comm status: %d\n", result
);
1023 static bool cp210x_tx_empty(struct usb_serial_port
*port
)
1028 err
= cp210x_get_tx_queue_byte_count(port
, &count
);
1036 * cp210x_get_termios
1037 * Reads the baud rate, data bits, parity, stop bits and flow control mode
1038 * from the device, corrects any unsupported values, and configures the
1039 * termios structure to reflect the state of the device
1041 static void cp210x_get_termios(struct tty_struct
*tty
,
1042 struct usb_serial_port
*port
)
1047 cp210x_get_termios_port(tty
->driver_data
,
1048 &tty
->termios
.c_cflag
, &baud
);
1049 tty_encode_baud_rate(tty
, baud
, baud
);
1053 cp210x_get_termios_port(port
, &cflag
, &baud
);
1058 * cp210x_get_termios_port
1059 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
1061 static void cp210x_get_termios_port(struct usb_serial_port
*port
,
1062 tcflag_t
*cflagp
, unsigned int *baudp
)
1064 struct device
*dev
= &port
->dev
;
1066 struct cp210x_flow_ctl flow_ctl
;
1072 cp210x_read_u32_reg(port
, CP210X_GET_BAUDRATE
, &baud
);
1074 dev_dbg(dev
, "%s - baud rate = %d\n", __func__
, baud
);
1079 cp210x_get_line_ctl(port
, &bits
);
1081 switch (bits
& BITS_DATA_MASK
) {
1083 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
1087 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
1091 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
1095 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
1099 dev_dbg(dev
, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__
);
1101 bits
&= ~BITS_DATA_MASK
;
1102 bits
|= BITS_DATA_8
;
1103 cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
);
1106 dev_dbg(dev
, "%s - Unknown number of data bits, using 8\n", __func__
);
1108 bits
&= ~BITS_DATA_MASK
;
1109 bits
|= BITS_DATA_8
;
1110 cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
);
1114 switch (bits
& BITS_PARITY_MASK
) {
1115 case BITS_PARITY_NONE
:
1116 dev_dbg(dev
, "%s - parity = NONE\n", __func__
);
1119 case BITS_PARITY_ODD
:
1120 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
1121 cflag
|= (PARENB
|PARODD
);
1123 case BITS_PARITY_EVEN
:
1124 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
1128 case BITS_PARITY_MARK
:
1129 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
1130 cflag
|= (PARENB
|PARODD
|CMSPAR
);
1132 case BITS_PARITY_SPACE
:
1133 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
1135 cflag
|= (PARENB
|CMSPAR
);
1138 dev_dbg(dev
, "%s - Unknown parity mode, disabling parity\n", __func__
);
1140 bits
&= ~BITS_PARITY_MASK
;
1141 cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
);
1146 switch (bits
& BITS_STOP_MASK
) {
1148 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
1151 dev_dbg(dev
, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__
);
1152 bits
&= ~BITS_STOP_MASK
;
1153 cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
);
1156 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
1160 dev_dbg(dev
, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__
);
1161 bits
&= ~BITS_STOP_MASK
;
1162 cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
);
1166 cp210x_read_reg_block(port
, CP210X_GET_FLOW
, &flow_ctl
,
1168 ctl_hs
= le32_to_cpu(flow_ctl
.ulControlHandshake
);
1169 if (ctl_hs
& CP210X_SERIAL_CTS_HANDSHAKE
) {
1170 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
1172 * When the port is closed, the CP210x hardware disables
1173 * auto-RTS and RTS is deasserted but it leaves auto-CTS when
1174 * in hardware flow control mode. When re-opening the port, if
1175 * auto-CTS is enabled on the cp210x, then auto-RTS must be
1176 * re-enabled in the driver.
1178 flow_repl
= le32_to_cpu(flow_ctl
.ulFlowReplace
);
1179 flow_repl
&= ~CP210X_SERIAL_RTS_MASK
;
1180 flow_repl
|= CP210X_SERIAL_RTS_SHIFT(CP210X_SERIAL_RTS_FLOW_CTL
);
1181 flow_ctl
.ulFlowReplace
= cpu_to_le32(flow_repl
);
1182 cp210x_write_reg_block(port
,
1189 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
1196 struct cp210x_rate
{
1201 static const struct cp210x_rate cp210x_an205_table1
[] = {
1230 { 921600, UINT_MAX
}
1234 * Quantises the baud rate as per AN205 Table 1
1236 static speed_t
cp210x_get_an205_rate(speed_t baud
)
1240 for (i
= 0; i
< ARRAY_SIZE(cp210x_an205_table1
); ++i
) {
1241 if (baud
<= cp210x_an205_table1
[i
].high
)
1245 return cp210x_an205_table1
[i
].rate
;
1248 static speed_t
cp210x_get_actual_rate(speed_t baud
)
1250 unsigned int prescale
= 1;
1256 div
= DIV_ROUND_CLOSEST(48000000, 2 * prescale
* baud
);
1257 baud
= 48000000 / (2 * prescale
* div
);
1263 * CP2101 supports the following baud rates:
1265 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
1266 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
1268 * CP2102 and CP2103 support the following additional rates:
1270 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
1273 * The device will map a requested rate to a supported one, but the result
1274 * of requests for rates greater than 1053257 is undefined (see AN205).
1276 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
1277 * respectively, with an error less than 1%. The actual rates are determined
1280 * div = round(freq / (2 x prescale x request))
1281 * actual = freq / (2 x prescale x div)
1283 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
1285 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
1288 static void cp210x_change_speed(struct tty_struct
*tty
,
1289 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
1291 struct usb_serial
*serial
= port
->serial
;
1292 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1296 * This maps the requested rate to the actual rate, a valid rate on
1297 * cp2102 or cp2103, or to an arbitrary rate in [1M, max_speed].
1299 * NOTE: B0 is not implemented.
1301 baud
= clamp(tty
->termios
.c_ospeed
, priv
->min_speed
, priv
->max_speed
);
1303 if (priv
->use_actual_rate
)
1304 baud
= cp210x_get_actual_rate(baud
);
1305 else if (baud
< 1000000)
1306 baud
= cp210x_get_an205_rate(baud
);
1308 dev_dbg(&port
->dev
, "%s - setting baud rate to %u\n", __func__
, baud
);
1309 if (cp210x_write_u32_reg(port
, CP210X_SET_BAUDRATE
, baud
)) {
1310 dev_warn(&port
->dev
, "failed to set baud rate to %u\n", baud
);
1312 baud
= old_termios
->c_ospeed
;
1317 tty_encode_baud_rate(tty
, baud
, baud
);
1320 static void cp210x_enable_event_mode(struct usb_serial_port
*port
)
1322 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
1325 if (port_priv
->event_mode
)
1328 port_priv
->event_state
= ES_DATA
;
1329 port_priv
->event_mode
= true;
1331 ret
= cp210x_write_u16_reg(port
, CP210X_EMBED_EVENTS
, CP210X_ESCCHAR
);
1333 dev_err(&port
->dev
, "failed to enable events: %d\n", ret
);
1334 port_priv
->event_mode
= false;
1338 static void cp210x_disable_event_mode(struct usb_serial_port
*port
)
1340 struct cp210x_port_private
*port_priv
= usb_get_serial_port_data(port
);
1343 if (!port_priv
->event_mode
)
1346 ret
= cp210x_write_u16_reg(port
, CP210X_EMBED_EVENTS
, 0);
1348 dev_err(&port
->dev
, "failed to disable events: %d\n", ret
);
1352 port_priv
->event_mode
= false;
1355 static void cp210x_set_termios(struct tty_struct
*tty
,
1356 struct usb_serial_port
*port
, struct ktermios
*old_termios
)
1358 struct device
*dev
= &port
->dev
;
1359 unsigned int cflag
, old_cflag
;
1362 cflag
= tty
->termios
.c_cflag
;
1363 old_cflag
= old_termios
->c_cflag
;
1365 if (tty
->termios
.c_ospeed
!= old_termios
->c_ospeed
)
1366 cp210x_change_speed(tty
, port
, old_termios
);
1368 /* If the number of data bits is to be updated */
1369 if ((cflag
& CSIZE
) != (old_cflag
& CSIZE
)) {
1370 cp210x_get_line_ctl(port
, &bits
);
1371 bits
&= ~BITS_DATA_MASK
;
1372 switch (cflag
& CSIZE
) {
1374 bits
|= BITS_DATA_5
;
1375 dev_dbg(dev
, "%s - data bits = 5\n", __func__
);
1378 bits
|= BITS_DATA_6
;
1379 dev_dbg(dev
, "%s - data bits = 6\n", __func__
);
1382 bits
|= BITS_DATA_7
;
1383 dev_dbg(dev
, "%s - data bits = 7\n", __func__
);
1387 bits
|= BITS_DATA_8
;
1388 dev_dbg(dev
, "%s - data bits = 8\n", __func__
);
1391 if (cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
))
1392 dev_dbg(dev
, "Number of data bits requested not supported by device\n");
1395 if ((cflag
& (PARENB
|PARODD
|CMSPAR
)) !=
1396 (old_cflag
& (PARENB
|PARODD
|CMSPAR
))) {
1397 cp210x_get_line_ctl(port
, &bits
);
1398 bits
&= ~BITS_PARITY_MASK
;
1399 if (cflag
& PARENB
) {
1400 if (cflag
& CMSPAR
) {
1401 if (cflag
& PARODD
) {
1402 bits
|= BITS_PARITY_MARK
;
1403 dev_dbg(dev
, "%s - parity = MARK\n", __func__
);
1405 bits
|= BITS_PARITY_SPACE
;
1406 dev_dbg(dev
, "%s - parity = SPACE\n", __func__
);
1409 if (cflag
& PARODD
) {
1410 bits
|= BITS_PARITY_ODD
;
1411 dev_dbg(dev
, "%s - parity = ODD\n", __func__
);
1413 bits
|= BITS_PARITY_EVEN
;
1414 dev_dbg(dev
, "%s - parity = EVEN\n", __func__
);
1418 if (cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
))
1419 dev_dbg(dev
, "Parity mode not supported by device\n");
1422 if ((cflag
& CSTOPB
) != (old_cflag
& CSTOPB
)) {
1423 cp210x_get_line_ctl(port
, &bits
);
1424 bits
&= ~BITS_STOP_MASK
;
1425 if (cflag
& CSTOPB
) {
1426 bits
|= BITS_STOP_2
;
1427 dev_dbg(dev
, "%s - stop bits = 2\n", __func__
);
1429 bits
|= BITS_STOP_1
;
1430 dev_dbg(dev
, "%s - stop bits = 1\n", __func__
);
1432 if (cp210x_write_u16_reg(port
, CP210X_SET_LINE_CTL
, bits
))
1433 dev_dbg(dev
, "Number of stop bits requested not supported by device\n");
1436 if ((cflag
& CRTSCTS
) != (old_cflag
& CRTSCTS
)) {
1437 struct cp210x_flow_ctl flow_ctl
;
1441 cp210x_read_reg_block(port
, CP210X_GET_FLOW
, &flow_ctl
,
1443 ctl_hs
= le32_to_cpu(flow_ctl
.ulControlHandshake
);
1444 flow_repl
= le32_to_cpu(flow_ctl
.ulFlowReplace
);
1445 dev_dbg(dev
, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1446 __func__
, ctl_hs
, flow_repl
);
1448 ctl_hs
&= ~CP210X_SERIAL_DSR_HANDSHAKE
;
1449 ctl_hs
&= ~CP210X_SERIAL_DCD_HANDSHAKE
;
1450 ctl_hs
&= ~CP210X_SERIAL_DSR_SENSITIVITY
;
1451 ctl_hs
&= ~CP210X_SERIAL_DTR_MASK
;
1452 ctl_hs
|= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE
);
1453 if (cflag
& CRTSCTS
) {
1454 ctl_hs
|= CP210X_SERIAL_CTS_HANDSHAKE
;
1456 flow_repl
&= ~CP210X_SERIAL_RTS_MASK
;
1457 flow_repl
|= CP210X_SERIAL_RTS_SHIFT(
1458 CP210X_SERIAL_RTS_FLOW_CTL
);
1459 dev_dbg(dev
, "%s - flow control = CRTSCTS\n", __func__
);
1461 ctl_hs
&= ~CP210X_SERIAL_CTS_HANDSHAKE
;
1463 flow_repl
&= ~CP210X_SERIAL_RTS_MASK
;
1464 flow_repl
|= CP210X_SERIAL_RTS_SHIFT(
1465 CP210X_SERIAL_RTS_ACTIVE
);
1466 dev_dbg(dev
, "%s - flow control = NONE\n", __func__
);
1469 dev_dbg(dev
, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
1470 __func__
, ctl_hs
, flow_repl
);
1471 flow_ctl
.ulControlHandshake
= cpu_to_le32(ctl_hs
);
1472 flow_ctl
.ulFlowReplace
= cpu_to_le32(flow_repl
);
1473 cp210x_write_reg_block(port
, CP210X_SET_FLOW
, &flow_ctl
,
1478 * Enable event-insertion mode only if input parity checking is
1482 cp210x_enable_event_mode(port
);
1484 cp210x_disable_event_mode(port
);
1487 static int cp210x_tiocmset(struct tty_struct
*tty
,
1488 unsigned int set
, unsigned int clear
)
1490 struct usb_serial_port
*port
= tty
->driver_data
;
1491 return cp210x_tiocmset_port(port
, set
, clear
);
1494 static int cp210x_tiocmset_port(struct usb_serial_port
*port
,
1495 unsigned int set
, unsigned int clear
)
1499 if (set
& TIOCM_RTS
) {
1500 control
|= CONTROL_RTS
;
1501 control
|= CONTROL_WRITE_RTS
;
1503 if (set
& TIOCM_DTR
) {
1504 control
|= CONTROL_DTR
;
1505 control
|= CONTROL_WRITE_DTR
;
1507 if (clear
& TIOCM_RTS
) {
1508 control
&= ~CONTROL_RTS
;
1509 control
|= CONTROL_WRITE_RTS
;
1511 if (clear
& TIOCM_DTR
) {
1512 control
&= ~CONTROL_DTR
;
1513 control
|= CONTROL_WRITE_DTR
;
1516 dev_dbg(&port
->dev
, "%s - control = 0x%.4x\n", __func__
, control
);
1518 return cp210x_write_u16_reg(port
, CP210X_SET_MHS
, control
);
1521 static void cp210x_dtr_rts(struct usb_serial_port
*p
, int on
)
1524 cp210x_tiocmset_port(p
, TIOCM_DTR
|TIOCM_RTS
, 0);
1526 cp210x_tiocmset_port(p
, 0, TIOCM_DTR
|TIOCM_RTS
);
1529 static int cp210x_tiocmget(struct tty_struct
*tty
)
1531 struct usb_serial_port
*port
= tty
->driver_data
;
1535 result
= cp210x_read_u8_reg(port
, CP210X_GET_MDMSTS
, &control
);
1539 result
= ((control
& CONTROL_DTR
) ? TIOCM_DTR
: 0)
1540 |((control
& CONTROL_RTS
) ? TIOCM_RTS
: 0)
1541 |((control
& CONTROL_CTS
) ? TIOCM_CTS
: 0)
1542 |((control
& CONTROL_DSR
) ? TIOCM_DSR
: 0)
1543 |((control
& CONTROL_RING
)? TIOCM_RI
: 0)
1544 |((control
& CONTROL_DCD
) ? TIOCM_CD
: 0);
1546 dev_dbg(&port
->dev
, "%s - control = 0x%.2x\n", __func__
, control
);
1551 static void cp210x_break_ctl(struct tty_struct
*tty
, int break_state
)
1553 struct usb_serial_port
*port
= tty
->driver_data
;
1556 if (break_state
== 0)
1560 dev_dbg(&port
->dev
, "%s - turning break %s\n", __func__
,
1561 state
== BREAK_OFF
? "off" : "on");
1562 cp210x_write_u16_reg(port
, CP210X_SET_BREAK
, state
);
1565 #ifdef CONFIG_GPIOLIB
1566 static int cp210x_gpio_request(struct gpio_chip
*gc
, unsigned int offset
)
1568 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1569 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1571 if (priv
->gpio_altfunc
& BIT(offset
))
1577 static int cp210x_gpio_get(struct gpio_chip
*gc
, unsigned int gpio
)
1579 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1580 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1581 u8 req_type
= REQTYPE_DEVICE_TO_HOST
;
1585 if (priv
->partnum
== CP210X_PARTNUM_CP2105
)
1586 req_type
= REQTYPE_INTERFACE_TO_HOST
;
1588 result
= usb_autopm_get_interface(serial
->interface
);
1592 result
= cp210x_read_vendor_block(serial
, req_type
,
1593 CP210X_READ_LATCH
, &buf
, sizeof(buf
));
1594 usb_autopm_put_interface(serial
->interface
);
1598 return !!(buf
& BIT(gpio
));
1601 static void cp210x_gpio_set(struct gpio_chip
*gc
, unsigned int gpio
, int value
)
1603 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1604 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1605 struct cp210x_gpio_write buf
;
1609 buf
.state
= BIT(gpio
);
1613 buf
.mask
= BIT(gpio
);
1615 result
= usb_autopm_get_interface(serial
->interface
);
1619 if (priv
->partnum
== CP210X_PARTNUM_CP2105
) {
1620 result
= cp210x_write_vendor_block(serial
,
1621 REQTYPE_HOST_TO_INTERFACE
,
1622 CP210X_WRITE_LATCH
, &buf
,
1625 u16 wIndex
= buf
.state
<< 8 | buf
.mask
;
1627 result
= usb_control_msg(serial
->dev
,
1628 usb_sndctrlpipe(serial
->dev
, 0),
1629 CP210X_VENDOR_SPECIFIC
,
1630 REQTYPE_HOST_TO_DEVICE
,
1633 NULL
, 0, USB_CTRL_SET_TIMEOUT
);
1636 usb_autopm_put_interface(serial
->interface
);
1639 dev_err(&serial
->interface
->dev
, "failed to set GPIO value: %d\n",
1644 static int cp210x_gpio_direction_get(struct gpio_chip
*gc
, unsigned int gpio
)
1646 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1647 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1649 return priv
->gpio_input
& BIT(gpio
);
1652 static int cp210x_gpio_direction_input(struct gpio_chip
*gc
, unsigned int gpio
)
1654 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1655 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1657 if (priv
->partnum
== CP210X_PARTNUM_CP2105
) {
1658 /* hardware does not support an input mode */
1662 /* push-pull pins cannot be changed to be inputs */
1663 if (priv
->gpio_pushpull
& BIT(gpio
))
1666 /* make sure to release pin if it is being driven low */
1667 cp210x_gpio_set(gc
, gpio
, 1);
1669 priv
->gpio_input
|= BIT(gpio
);
1674 static int cp210x_gpio_direction_output(struct gpio_chip
*gc
, unsigned int gpio
,
1677 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1678 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1680 priv
->gpio_input
&= ~BIT(gpio
);
1681 cp210x_gpio_set(gc
, gpio
, value
);
1686 static int cp210x_gpio_set_config(struct gpio_chip
*gc
, unsigned int gpio
,
1687 unsigned long config
)
1689 struct usb_serial
*serial
= gpiochip_get_data(gc
);
1690 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1691 enum pin_config_param param
= pinconf_to_config_param(config
);
1693 /* Succeed only if in correct mode (this can't be set at runtime) */
1694 if ((param
== PIN_CONFIG_DRIVE_PUSH_PULL
) &&
1695 (priv
->gpio_pushpull
& BIT(gpio
)))
1698 if ((param
== PIN_CONFIG_DRIVE_OPEN_DRAIN
) &&
1699 !(priv
->gpio_pushpull
& BIT(gpio
)))
1706 * This function is for configuring GPIO using shared pins, where other signals
1707 * are made unavailable by configuring the use of GPIO. This is believed to be
1708 * only applicable to the cp2105 at this point, the other devices supported by
1709 * this driver that provide GPIO do so in a way that does not impact other
1710 * signals and are thus expected to have very different initialisation.
1712 static int cp2105_gpioconf_init(struct usb_serial
*serial
)
1714 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1715 struct cp210x_pin_mode mode
;
1716 struct cp210x_dual_port_config config
;
1717 u8 intf_num
= cp210x_interface_num(serial
);
1721 result
= cp210x_read_vendor_block(serial
, REQTYPE_DEVICE_TO_HOST
,
1722 CP210X_GET_DEVICEMODE
, &mode
,
1727 result
= cp210x_read_vendor_block(serial
, REQTYPE_DEVICE_TO_HOST
,
1728 CP210X_GET_PORTCONFIG
, &config
,
1733 /* 2 banks of GPIO - One for the pins taken from each serial port */
1734 if (intf_num
== 0) {
1735 if (mode
.eci
== CP210X_PIN_MODE_MODEM
) {
1736 /* mark all GPIOs of this interface as reserved */
1737 priv
->gpio_altfunc
= 0xff;
1741 iface_config
= config
.eci_cfg
;
1742 priv
->gpio_pushpull
= (u8
)((le16_to_cpu(config
.gpio_mode
) &
1743 CP210X_ECI_GPIO_MODE_MASK
) >>
1744 CP210X_ECI_GPIO_MODE_OFFSET
);
1746 } else if (intf_num
== 1) {
1747 if (mode
.sci
== CP210X_PIN_MODE_MODEM
) {
1748 /* mark all GPIOs of this interface as reserved */
1749 priv
->gpio_altfunc
= 0xff;
1753 iface_config
= config
.sci_cfg
;
1754 priv
->gpio_pushpull
= (u8
)((le16_to_cpu(config
.gpio_mode
) &
1755 CP210X_SCI_GPIO_MODE_MASK
) >>
1756 CP210X_SCI_GPIO_MODE_OFFSET
);
1762 /* mark all pins which are not in GPIO mode */
1763 if (iface_config
& CP2105_GPIO0_TXLED_MODE
) /* GPIO 0 */
1764 priv
->gpio_altfunc
|= BIT(0);
1765 if (iface_config
& (CP2105_GPIO1_RXLED_MODE
| /* GPIO 1 */
1766 CP2105_GPIO1_RS485_MODE
))
1767 priv
->gpio_altfunc
|= BIT(1);
1769 /* driver implementation for CP2105 only supports outputs */
1770 priv
->gpio_input
= 0;
1775 static int cp2104_gpioconf_init(struct usb_serial
*serial
)
1777 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1778 struct cp210x_single_port_config config
;
1784 result
= cp210x_read_vendor_block(serial
, REQTYPE_DEVICE_TO_HOST
,
1785 CP210X_GET_PORTCONFIG
, &config
,
1792 iface_config
= config
.device_cfg
;
1793 priv
->gpio_pushpull
= (u8
)((le16_to_cpu(config
.gpio_mode
) &
1794 CP210X_GPIO_MODE_MASK
) >>
1795 CP210X_GPIO_MODE_OFFSET
);
1796 gpio_latch
= (u8
)((le16_to_cpu(config
.reset_state
) &
1797 CP210X_GPIO_MODE_MASK
) >>
1798 CP210X_GPIO_MODE_OFFSET
);
1800 /* mark all pins which are not in GPIO mode */
1801 if (iface_config
& CP2104_GPIO0_TXLED_MODE
) /* GPIO 0 */
1802 priv
->gpio_altfunc
|= BIT(0);
1803 if (iface_config
& CP2104_GPIO1_RXLED_MODE
) /* GPIO 1 */
1804 priv
->gpio_altfunc
|= BIT(1);
1805 if (iface_config
& CP2104_GPIO2_RS485_MODE
) /* GPIO 2 */
1806 priv
->gpio_altfunc
|= BIT(2);
1809 * Like CP2102N, CP2104 has also no strict input and output pin
1811 * Do the same input mode emulation as CP2102N.
1813 for (i
= 0; i
< priv
->gc
.ngpio
; ++i
) {
1815 * Set direction to "input" iff pin is open-drain and reset
1818 if (!(priv
->gpio_pushpull
& BIT(i
)) && (gpio_latch
& BIT(i
)))
1819 priv
->gpio_input
|= BIT(i
);
1825 static int cp2102n_gpioconf_init(struct usb_serial
*serial
)
1827 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1828 const u16 config_size
= 0x02a6;
1839 * Retrieve device configuration from the device.
1840 * The array received contains all customization settings done at the
1841 * factory/manufacturer. Format of the array is documented at the
1842 * time of writing at:
1843 * https://www.silabs.com/community/interface/knowledge-base.entry.html/2017/03/31/cp2102n_setconfig-xsfa
1845 config_buf
= kmalloc(config_size
, GFP_KERNEL
);
1849 result
= cp210x_read_vendor_block(serial
,
1850 REQTYPE_DEVICE_TO_HOST
,
1851 CP210X_READ_2NCONFIG
,
1859 config_version
= config_buf
[CP210X_2NCONFIG_CONFIG_VERSION_IDX
];
1860 gpio_pushpull
= config_buf
[CP210X_2NCONFIG_GPIO_MODE_IDX
];
1861 gpio_ctrl
= config_buf
[CP210X_2NCONFIG_GPIO_CONTROL_IDX
];
1862 gpio_rst_latch
= config_buf
[CP210X_2NCONFIG_GPIO_RSTLATCH_IDX
];
1866 /* Make sure this is a config format we understand. */
1867 if (config_version
!= 0x01)
1873 * Get default pin states after reset. Needed so we can determine
1874 * the direction of an open-drain pin.
1876 gpio_latch
= (gpio_rst_latch
>> 3) & 0x0f;
1878 /* 0 indicates open-drain mode, 1 is push-pull */
1879 priv
->gpio_pushpull
= (gpio_pushpull
>> 3) & 0x0f;
1881 /* 0 indicates GPIO mode, 1 is alternate function */
1882 priv
->gpio_altfunc
= (gpio_ctrl
>> 2) & 0x0f;
1884 if (priv
->partnum
== CP210X_PARTNUM_CP2102N_QFN28
) {
1886 * For the QFN28 package, GPIO4-6 are controlled by
1887 * the low three bits of the mode/latch fields.
1888 * Contrary to the document linked above, the bits for
1889 * the SUSPEND pins are elsewhere. No alternate
1890 * function is available for these pins.
1893 gpio_latch
|= (gpio_rst_latch
& 7) << 4;
1894 priv
->gpio_pushpull
|= (gpio_pushpull
& 7) << 4;
1898 * The CP2102N does not strictly has input and output pin modes,
1899 * it only knows open-drain and push-pull modes which is set at
1900 * factory. An open-drain pin can function both as an
1901 * input or an output. We emulate input mode for open-drain pins
1902 * by making sure they are not driven low, and we do not allow
1903 * push-pull pins to be set as an input.
1905 for (i
= 0; i
< priv
->gc
.ngpio
; ++i
) {
1907 * Set direction to "input" iff pin is open-drain and reset
1910 if (!(priv
->gpio_pushpull
& BIT(i
)) && (gpio_latch
& BIT(i
)))
1911 priv
->gpio_input
|= BIT(i
);
1917 static int cp210x_gpio_init(struct usb_serial
*serial
)
1919 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1922 switch (priv
->partnum
) {
1923 case CP210X_PARTNUM_CP2104
:
1924 result
= cp2104_gpioconf_init(serial
);
1926 case CP210X_PARTNUM_CP2105
:
1927 result
= cp2105_gpioconf_init(serial
);
1929 case CP210X_PARTNUM_CP2102N_QFN28
:
1930 case CP210X_PARTNUM_CP2102N_QFN24
:
1931 case CP210X_PARTNUM_CP2102N_QFN20
:
1932 result
= cp2102n_gpioconf_init(serial
);
1941 priv
->gc
.label
= "cp210x";
1942 priv
->gc
.request
= cp210x_gpio_request
;
1943 priv
->gc
.get_direction
= cp210x_gpio_direction_get
;
1944 priv
->gc
.direction_input
= cp210x_gpio_direction_input
;
1945 priv
->gc
.direction_output
= cp210x_gpio_direction_output
;
1946 priv
->gc
.get
= cp210x_gpio_get
;
1947 priv
->gc
.set
= cp210x_gpio_set
;
1948 priv
->gc
.set_config
= cp210x_gpio_set_config
;
1949 priv
->gc
.owner
= THIS_MODULE
;
1950 priv
->gc
.parent
= &serial
->interface
->dev
;
1952 priv
->gc
.can_sleep
= true;
1954 result
= gpiochip_add_data(&priv
->gc
, serial
);
1956 priv
->gpio_registered
= true;
1961 static void cp210x_gpio_remove(struct usb_serial
*serial
)
1963 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
1965 if (priv
->gpio_registered
) {
1966 gpiochip_remove(&priv
->gc
);
1967 priv
->gpio_registered
= false;
1973 static int cp210x_gpio_init(struct usb_serial
*serial
)
1978 static void cp210x_gpio_remove(struct usb_serial
*serial
)
1985 static int cp210x_port_probe(struct usb_serial_port
*port
)
1987 struct usb_serial
*serial
= port
->serial
;
1988 struct cp210x_port_private
*port_priv
;
1991 port_priv
= kzalloc(sizeof(*port_priv
), GFP_KERNEL
);
1995 port_priv
->bInterfaceNumber
= cp210x_interface_num(serial
);
1997 usb_set_serial_port_data(port
, port_priv
);
1999 ret
= cp210x_detect_swapped_line_ctl(port
);
2008 static int cp210x_port_remove(struct usb_serial_port
*port
)
2010 struct cp210x_port_private
*port_priv
;
2012 port_priv
= usb_get_serial_port_data(port
);
2018 static void cp210x_init_max_speed(struct usb_serial
*serial
)
2020 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
2021 bool use_actual_rate
= false;
2025 switch (priv
->partnum
) {
2026 case CP210X_PARTNUM_CP2101
:
2029 case CP210X_PARTNUM_CP2102
:
2030 case CP210X_PARTNUM_CP2103
:
2033 case CP210X_PARTNUM_CP2104
:
2034 use_actual_rate
= true;
2037 case CP210X_PARTNUM_CP2108
:
2040 case CP210X_PARTNUM_CP2105
:
2041 if (cp210x_interface_num(serial
) == 0) {
2042 use_actual_rate
= true;
2043 max
= 2000000; /* ECI */
2046 max
= 921600; /* SCI */
2049 case CP210X_PARTNUM_CP2102N_QFN28
:
2050 case CP210X_PARTNUM_CP2102N_QFN24
:
2051 case CP210X_PARTNUM_CP2102N_QFN20
:
2052 use_actual_rate
= true;
2060 priv
->min_speed
= min
;
2061 priv
->max_speed
= max
;
2062 priv
->use_actual_rate
= use_actual_rate
;
2065 static int cp210x_attach(struct usb_serial
*serial
)
2068 struct cp210x_serial_private
*priv
;
2070 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
2074 result
= cp210x_read_vendor_block(serial
, REQTYPE_DEVICE_TO_HOST
,
2075 CP210X_GET_PARTNUM
, &priv
->partnum
,
2076 sizeof(priv
->partnum
));
2078 dev_warn(&serial
->interface
->dev
,
2079 "querying part number failed\n");
2080 priv
->partnum
= CP210X_PARTNUM_UNKNOWN
;
2083 usb_set_serial_data(serial
, priv
);
2085 cp210x_init_max_speed(serial
);
2087 result
= cp210x_gpio_init(serial
);
2089 dev_err(&serial
->interface
->dev
, "GPIO initialisation failed: %d\n",
2096 static void cp210x_disconnect(struct usb_serial
*serial
)
2098 cp210x_gpio_remove(serial
);
2101 static void cp210x_release(struct usb_serial
*serial
)
2103 struct cp210x_serial_private
*priv
= usb_get_serial_data(serial
);
2105 cp210x_gpio_remove(serial
);
2110 module_usb_serial_driver(serial_drivers
, id_table
);
2112 MODULE_DESCRIPTION(DRIVER_DESC
);
2113 MODULE_LICENSE("GPL v2");