1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
4 | * |
5 | * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) |
6 | * Copyright (C) 2010-2021 Johan Hovold (johan@kernel.org) |
7 | * |
8 | * Support to set flow control line levels using TIOCMGET and TIOCMSET |
9 | * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow |
10 | * control thanks to Munir Nassar nassarmu@real-time.com |
11 | * |
12 | */ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/errno.h> |
16 | #include <linux/slab.h> |
17 | #include <linux/tty.h> |
18 | #include <linux/tty_flip.h> |
19 | #include <linux/module.h> |
20 | #include <linux/usb.h> |
21 | #include <linux/usb/serial.h> |
22 | #include <linux/gpio/driver.h> |
23 | #include <linux/bitops.h> |
24 | #include <linux/mutex.h> |
25 | |
26 | #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" |
27 | |
28 | /* |
29 | * Function Prototypes |
30 | */ |
31 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); |
32 | static void cp210x_close(struct usb_serial_port *); |
33 | static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, |
34 | const struct ktermios *); |
35 | static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, |
36 | const struct ktermios *); |
37 | static bool cp210x_tx_empty(struct usb_serial_port *port); |
38 | static int cp210x_tiocmget(struct tty_struct *); |
39 | static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); |
40 | static int cp210x_tiocmset_port(struct usb_serial_port *port, |
41 | unsigned int, unsigned int); |
42 | static int cp210x_break_ctl(struct tty_struct *, int); |
43 | static int cp210x_attach(struct usb_serial *); |
44 | static void cp210x_disconnect(struct usb_serial *); |
45 | static void cp210x_release(struct usb_serial *); |
46 | static int cp210x_port_probe(struct usb_serial_port *); |
47 | static void cp210x_port_remove(struct usb_serial_port *); |
48 | static void cp210x_dtr_rts(struct usb_serial_port *port, int on); |
49 | static void cp210x_process_read_urb(struct urb *urb); |
50 | static void cp210x_enable_event_mode(struct usb_serial_port *port); |
51 | static void cp210x_disable_event_mode(struct usb_serial_port *port); |
52 | |
53 | static const struct usb_device_id id_table[] = { |
54 | { USB_DEVICE(0x0404, 0x034C) }, /* NCR Retail IO Box */ |
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(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ |
60 | { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ |
61 | { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
62 | { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
63 | { USB_DEVICE(0x0908, 0x0070) }, /* Siemens SCALANCE LPE-9000 USB Serial Console */ |
64 | { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ |
65 | { USB_DEVICE(0x0988, 0x0578) }, /* Teraoka AD2000 */ |
66 | { USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */ |
67 | { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ |
68 | { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ |
69 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
70 | { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ |
71 | { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ |
72 | { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ |
73 | { USB_DEVICE(0x106F, 0x0003) }, /* CPI / Money Controls Bulk Coin Recycler */ |
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, 0x82AA) }, /* Silicon Labs IFS-USB-DATACABLE used with Quint UPS */ |
124 | { USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */ |
125 | { USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */ |
126 | { USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */ |
127 | { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */ |
128 | { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ |
129 | { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ |
130 | { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ |
131 | { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ |
132 | { USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */ |
133 | { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ |
134 | { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ |
135 | { USB_DEVICE(0x10C4, 0x8414) }, /* Decagon USB Cable Adapter */ |
136 | { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ |
137 | { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ |
138 | { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */ |
139 | { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ |
140 | { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */ |
141 | { USB_DEVICE(0x10C4, 0x851E) }, /* CESINEL MEDCAL PT Network Analyzer */ |
142 | { USB_DEVICE(0x10C4, 0x85A7) }, /* LifeScan OneTouch Verio IQ */ |
143 | { USB_DEVICE(0x10C4, 0x85B8) }, /* CESINEL ReCon T Energy Logger */ |
144 | { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ |
145 | { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ |
146 | { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ |
147 | { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ |
148 | { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ |
149 | { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ |
150 | { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ |
151 | { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ |
152 | { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ |
153 | { USB_DEVICE(0x10C4, 0x88D8) }, /* Acuity Brands nLight Air Adapter */ |
154 | { USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */ |
155 | { USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */ |
156 | { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ |
157 | { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */ |
158 | { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ |
159 | { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ |
160 | { USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */ |
161 | { USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */ |
162 | { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ |
163 | { USB_DEVICE(0x10C4, 0x8A5B) }, /* CEL EM3588 ZigBee USB Stick */ |
164 | { USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */ |
165 | { USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */ |
166 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
167 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
168 | { USB_DEVICE(0x10C4, 0xEA63) }, /* Silicon Labs Windows Update (CP2101-4/CP2102N) */ |
169 | { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ |
170 | { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
171 | { USB_DEVICE(0x10C4, 0xEA7A) }, /* Silicon Labs Windows Update (CP2105) */ |
172 | { USB_DEVICE(0x10C4, 0xEA7B) }, /* Silicon Labs Windows Update (CP2108) */ |
173 | { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
174 | { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ |
175 | { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ |
176 | { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ |
177 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
178 | { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
179 | { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */ |
180 | { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */ |
181 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
182 | { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
183 | { USB_DEVICE(0x155A, 0x1006) }, /* ELDAT Easywave RX09 */ |
184 | { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ |
185 | { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ |
186 | { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
187 | { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ |
188 | { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ |
189 | { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ |
190 | { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ |
191 | { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ |
192 | { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ |
193 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
194 | { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ |
195 | { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ |
196 | { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ |
197 | { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ |
198 | { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ |
199 | { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ |
200 | { USB_DEVICE(0x17A8, 0x0011) }, /* Kamstrup 444 MHz RF sniffer */ |
201 | { USB_DEVICE(0x17A8, 0x0013) }, /* Kamstrup 870 MHz RF sniffer */ |
202 | { USB_DEVICE(0x17A8, 0x0101) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Int Ant) */ |
203 | { USB_DEVICE(0x17A8, 0x0102) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Ext Ant) */ |
204 | { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ |
205 | { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ |
206 | { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ |
207 | { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */ |
208 | { USB_DEVICE(0x18EF, 0xE030) }, /* ELV ALC 8xxx Battery Charger */ |
209 | { USB_DEVICE(0x18EF, 0xE032) }, /* ELV TFD500 Data Logger */ |
210 | { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */ |
211 | { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */ |
212 | { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */ |
213 | { USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */ |
214 | { USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */ |
215 | { USB_DEVICE(0x1901, 0x0197) }, /* GE CS1000 M.2 Key E serial interface */ |
216 | { USB_DEVICE(0x1901, 0x0198) }, /* GE CS1000 Display serial interface */ |
217 | { USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */ |
218 | { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */ |
219 | { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ |
220 | { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ |
221 | { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ |
222 | { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ |
223 | { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ |
224 | { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ |
225 | { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ |
226 | { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ |
227 | { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ |
228 | { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ |
229 | { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ |
230 | { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ |
231 | { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ |
232 | { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ |
233 | { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ |
234 | { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ |
235 | { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ |
236 | { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ |
237 | { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ |
238 | { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ |
239 | { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ |
240 | { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ |
241 | { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ |
242 | { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ |
243 | { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ |
244 | { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ |
245 | { USB_DEVICE(0x2184, 0x0030) }, /* GW Instek GDM-834x Digital Multimeter */ |
246 | { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ |
247 | { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ |
248 | { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ |
249 | { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ |
250 | { USB_DEVICE(0x3923, 0x7A0B) }, /* National Instruments USB Serial Console */ |
251 | { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ |
252 | { } /* Terminating Entry */ |
253 | }; |
254 | |
255 | MODULE_DEVICE_TABLE(usb, id_table); |
256 | |
257 | struct cp210x_serial_private { |
258 | #ifdef CONFIG_GPIOLIB |
259 | struct gpio_chip gc; |
260 | bool gpio_registered; |
261 | u16 gpio_pushpull; |
262 | u16 gpio_altfunc; |
263 | u16 gpio_input; |
264 | #endif |
265 | u8 partnum; |
266 | u32 fw_version; |
267 | speed_t min_speed; |
268 | speed_t max_speed; |
269 | bool use_actual_rate; |
270 | bool no_flow_control; |
271 | bool no_event_mode; |
272 | }; |
273 | |
274 | enum cp210x_event_state { |
275 | ES_DATA, |
276 | ES_ESCAPE, |
277 | ES_LSR, |
278 | ES_LSR_DATA_0, |
279 | ES_LSR_DATA_1, |
280 | ES_MSR |
281 | }; |
282 | |
283 | struct cp210x_port_private { |
284 | u8 bInterfaceNumber; |
285 | bool event_mode; |
286 | enum cp210x_event_state event_state; |
287 | u8 lsr; |
288 | |
289 | struct mutex mutex; |
290 | bool crtscts; |
291 | bool dtr; |
292 | bool rts; |
293 | }; |
294 | |
295 | static struct usb_serial_driver cp210x_device = { |
296 | .driver = { |
297 | .owner = THIS_MODULE, |
298 | .name = "cp210x" , |
299 | }, |
300 | .id_table = id_table, |
301 | .num_ports = 1, |
302 | .bulk_in_size = 256, |
303 | .bulk_out_size = 256, |
304 | .open = cp210x_open, |
305 | .close = cp210x_close, |
306 | .break_ctl = cp210x_break_ctl, |
307 | .set_termios = cp210x_set_termios, |
308 | .tx_empty = cp210x_tx_empty, |
309 | .throttle = usb_serial_generic_throttle, |
310 | .unthrottle = usb_serial_generic_unthrottle, |
311 | .tiocmget = cp210x_tiocmget, |
312 | .tiocmset = cp210x_tiocmset, |
313 | .get_icount = usb_serial_generic_get_icount, |
314 | .attach = cp210x_attach, |
315 | .disconnect = cp210x_disconnect, |
316 | .release = cp210x_release, |
317 | .port_probe = cp210x_port_probe, |
318 | .port_remove = cp210x_port_remove, |
319 | .dtr_rts = cp210x_dtr_rts, |
320 | .process_read_urb = cp210x_process_read_urb, |
321 | }; |
322 | |
323 | static struct usb_serial_driver * const serial_drivers[] = { |
324 | &cp210x_device, NULL |
325 | }; |
326 | |
327 | /* Config request types */ |
328 | #define REQTYPE_HOST_TO_INTERFACE 0x41 |
329 | #define REQTYPE_INTERFACE_TO_HOST 0xc1 |
330 | #define REQTYPE_HOST_TO_DEVICE 0x40 |
331 | #define REQTYPE_DEVICE_TO_HOST 0xc0 |
332 | |
333 | /* Config request codes */ |
334 | #define CP210X_IFC_ENABLE 0x00 |
335 | #define CP210X_SET_BAUDDIV 0x01 |
336 | #define CP210X_GET_BAUDDIV 0x02 |
337 | #define CP210X_SET_LINE_CTL 0x03 |
338 | #define CP210X_GET_LINE_CTL 0x04 |
339 | #define CP210X_SET_BREAK 0x05 |
340 | #define CP210X_IMM_CHAR 0x06 |
341 | #define CP210X_SET_MHS 0x07 |
342 | #define CP210X_GET_MDMSTS 0x08 |
343 | #define CP210X_SET_XON 0x09 |
344 | #define CP210X_SET_XOFF 0x0A |
345 | #define CP210X_SET_EVENTMASK 0x0B |
346 | #define CP210X_GET_EVENTMASK 0x0C |
347 | #define CP210X_SET_CHAR 0x0D |
348 | #define CP210X_GET_CHARS 0x0E |
349 | #define CP210X_GET_PROPS 0x0F |
350 | #define CP210X_GET_COMM_STATUS 0x10 |
351 | #define CP210X_RESET 0x11 |
352 | #define CP210X_PURGE 0x12 |
353 | #define CP210X_SET_FLOW 0x13 |
354 | #define CP210X_GET_FLOW 0x14 |
355 | #define CP210X_EMBED_EVENTS 0x15 |
356 | #define CP210X_GET_EVENTSTATE 0x16 |
357 | #define CP210X_SET_CHARS 0x19 |
358 | #define CP210X_GET_BAUDRATE 0x1D |
359 | #define CP210X_SET_BAUDRATE 0x1E |
360 | #define CP210X_VENDOR_SPECIFIC 0xFF |
361 | |
362 | /* CP210X_IFC_ENABLE */ |
363 | #define UART_ENABLE 0x0001 |
364 | #define UART_DISABLE 0x0000 |
365 | |
366 | /* CP210X_(SET|GET)_BAUDDIV */ |
367 | #define BAUD_RATE_GEN_FREQ 0x384000 |
368 | |
369 | /* CP210X_(SET|GET)_LINE_CTL */ |
370 | #define BITS_DATA_MASK 0X0f00 |
371 | #define BITS_DATA_5 0X0500 |
372 | #define BITS_DATA_6 0X0600 |
373 | #define BITS_DATA_7 0X0700 |
374 | #define BITS_DATA_8 0X0800 |
375 | #define BITS_DATA_9 0X0900 |
376 | |
377 | #define BITS_PARITY_MASK 0x00f0 |
378 | #define BITS_PARITY_NONE 0x0000 |
379 | #define BITS_PARITY_ODD 0x0010 |
380 | #define BITS_PARITY_EVEN 0x0020 |
381 | #define BITS_PARITY_MARK 0x0030 |
382 | #define BITS_PARITY_SPACE 0x0040 |
383 | |
384 | #define BITS_STOP_MASK 0x000f |
385 | #define BITS_STOP_1 0x0000 |
386 | #define BITS_STOP_1_5 0x0001 |
387 | #define BITS_STOP_2 0x0002 |
388 | |
389 | /* CP210X_SET_BREAK */ |
390 | #define BREAK_ON 0x0001 |
391 | #define BREAK_OFF 0x0000 |
392 | |
393 | /* CP210X_(SET_MHS|GET_MDMSTS) */ |
394 | #define CONTROL_DTR 0x0001 |
395 | #define CONTROL_RTS 0x0002 |
396 | #define CONTROL_CTS 0x0010 |
397 | #define CONTROL_DSR 0x0020 |
398 | #define CONTROL_RING 0x0040 |
399 | #define CONTROL_DCD 0x0080 |
400 | #define CONTROL_WRITE_DTR 0x0100 |
401 | #define CONTROL_WRITE_RTS 0x0200 |
402 | |
403 | /* CP210X_(GET|SET)_CHARS */ |
404 | struct cp210x_special_chars { |
405 | u8 bEofChar; |
406 | u8 bErrorChar; |
407 | u8 bBreakChar; |
408 | u8 bEventChar; |
409 | u8 bXonChar; |
410 | u8 bXoffChar; |
411 | }; |
412 | |
413 | /* CP210X_VENDOR_SPECIFIC values */ |
414 | #define CP210X_GET_FW_VER 0x000E |
415 | #define CP210X_READ_2NCONFIG 0x000E |
416 | #define CP210X_GET_FW_VER_2N 0x0010 |
417 | #define CP210X_READ_LATCH 0x00C2 |
418 | #define CP210X_GET_PARTNUM 0x370B |
419 | #define CP210X_GET_PORTCONFIG 0x370C |
420 | #define CP210X_GET_DEVICEMODE 0x3711 |
421 | #define CP210X_WRITE_LATCH 0x37E1 |
422 | |
423 | /* Part number definitions */ |
424 | #define CP210X_PARTNUM_CP2101 0x01 |
425 | #define CP210X_PARTNUM_CP2102 0x02 |
426 | #define CP210X_PARTNUM_CP2103 0x03 |
427 | #define CP210X_PARTNUM_CP2104 0x04 |
428 | #define CP210X_PARTNUM_CP2105 0x05 |
429 | #define CP210X_PARTNUM_CP2108 0x08 |
430 | #define CP210X_PARTNUM_CP2102N_QFN28 0x20 |
431 | #define CP210X_PARTNUM_CP2102N_QFN24 0x21 |
432 | #define CP210X_PARTNUM_CP2102N_QFN20 0x22 |
433 | #define CP210X_PARTNUM_UNKNOWN 0xFF |
434 | |
435 | /* CP210X_GET_COMM_STATUS returns these 0x13 bytes */ |
436 | struct cp210x_comm_status { |
437 | __le32 ulErrors; |
438 | __le32 ulHoldReasons; |
439 | __le32 ulAmountInInQueue; |
440 | __le32 ulAmountInOutQueue; |
441 | u8 bEofReceived; |
442 | u8 bWaitForImmediate; |
443 | u8 bReserved; |
444 | } __packed; |
445 | |
446 | /* |
447 | * CP210X_PURGE - 16 bits passed in wValue of USB request. |
448 | * SiLabs app note AN571 gives a strange description of the 4 bits: |
449 | * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive. |
450 | * writing 1 to all, however, purges cp2108 well enough to avoid the hang. |
451 | */ |
452 | #define PURGE_ALL 0x000f |
453 | |
454 | /* CP210X_EMBED_EVENTS */ |
455 | #define CP210X_ESCCHAR 0xec |
456 | |
457 | #define CP210X_LSR_OVERRUN BIT(1) |
458 | #define CP210X_LSR_PARITY BIT(2) |
459 | #define CP210X_LSR_FRAME BIT(3) |
460 | #define CP210X_LSR_BREAK BIT(4) |
461 | |
462 | |
463 | /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ |
464 | struct cp210x_flow_ctl { |
465 | __le32 ulControlHandshake; |
466 | __le32 ulFlowReplace; |
467 | __le32 ulXonLimit; |
468 | __le32 ulXoffLimit; |
469 | }; |
470 | |
471 | /* cp210x_flow_ctl::ulControlHandshake */ |
472 | #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) |
473 | #define CP210X_SERIAL_DTR_INACTIVE (0 << 0) |
474 | #define CP210X_SERIAL_DTR_ACTIVE (1 << 0) |
475 | #define CP210X_SERIAL_DTR_FLOW_CTL (2 << 0) |
476 | #define CP210X_SERIAL_CTS_HANDSHAKE BIT(3) |
477 | #define CP210X_SERIAL_DSR_HANDSHAKE BIT(4) |
478 | #define CP210X_SERIAL_DCD_HANDSHAKE BIT(5) |
479 | #define CP210X_SERIAL_DSR_SENSITIVITY BIT(6) |
480 | |
481 | /* cp210x_flow_ctl::ulFlowReplace */ |
482 | #define CP210X_SERIAL_AUTO_TRANSMIT BIT(0) |
483 | #define CP210X_SERIAL_AUTO_RECEIVE BIT(1) |
484 | #define CP210X_SERIAL_ERROR_CHAR BIT(2) |
485 | #define CP210X_SERIAL_NULL_STRIPPING BIT(3) |
486 | #define CP210X_SERIAL_BREAK_CHAR BIT(4) |
487 | #define CP210X_SERIAL_RTS_MASK GENMASK(7, 6) |
488 | #define CP210X_SERIAL_RTS_INACTIVE (0 << 6) |
489 | #define CP210X_SERIAL_RTS_ACTIVE (1 << 6) |
490 | #define CP210X_SERIAL_RTS_FLOW_CTL (2 << 6) |
491 | #define CP210X_SERIAL_XOFF_CONTINUE BIT(31) |
492 | |
493 | /* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */ |
494 | struct cp210x_pin_mode { |
495 | u8 eci; |
496 | u8 sci; |
497 | }; |
498 | |
499 | #define CP210X_PIN_MODE_MODEM 0 |
500 | #define CP210X_PIN_MODE_GPIO BIT(0) |
501 | |
502 | /* |
503 | * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes |
504 | * on a CP2105 chip. Structure needs padding due to unused/unspecified bytes. |
505 | */ |
506 | struct cp210x_dual_port_config { |
507 | __le16 gpio_mode; |
508 | u8 __pad0[2]; |
509 | __le16 reset_state; |
510 | u8 __pad1[4]; |
511 | __le16 suspend_state; |
512 | u8 sci_cfg; |
513 | u8 eci_cfg; |
514 | u8 device_cfg; |
515 | } __packed; |
516 | |
517 | /* |
518 | * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xd bytes |
519 | * on a CP2104 chip. Structure needs padding due to unused/unspecified bytes. |
520 | */ |
521 | struct cp210x_single_port_config { |
522 | __le16 gpio_mode; |
523 | u8 __pad0[2]; |
524 | __le16 reset_state; |
525 | u8 __pad1[4]; |
526 | __le16 suspend_state; |
527 | u8 device_cfg; |
528 | } __packed; |
529 | |
530 | /* GPIO modes */ |
531 | #define CP210X_SCI_GPIO_MODE_OFFSET 9 |
532 | #define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9) |
533 | |
534 | #define CP210X_ECI_GPIO_MODE_OFFSET 2 |
535 | #define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2) |
536 | |
537 | #define CP210X_GPIO_MODE_OFFSET 8 |
538 | #define CP210X_GPIO_MODE_MASK GENMASK(11, 8) |
539 | |
540 | /* CP2105 port configuration values */ |
541 | #define CP2105_GPIO0_TXLED_MODE BIT(0) |
542 | #define CP2105_GPIO1_RXLED_MODE BIT(1) |
543 | #define CP2105_GPIO1_RS485_MODE BIT(2) |
544 | |
545 | /* CP2104 port configuration values */ |
546 | #define CP2104_GPIO0_TXLED_MODE BIT(0) |
547 | #define CP2104_GPIO1_RXLED_MODE BIT(1) |
548 | #define CP2104_GPIO2_RS485_MODE BIT(2) |
549 | |
550 | struct cp210x_quad_port_state { |
551 | __le16 gpio_mode_pb0; |
552 | __le16 gpio_mode_pb1; |
553 | __le16 gpio_mode_pb2; |
554 | __le16 gpio_mode_pb3; |
555 | __le16 gpio_mode_pb4; |
556 | |
557 | __le16 gpio_lowpower_pb0; |
558 | __le16 gpio_lowpower_pb1; |
559 | __le16 gpio_lowpower_pb2; |
560 | __le16 gpio_lowpower_pb3; |
561 | __le16 gpio_lowpower_pb4; |
562 | |
563 | __le16 gpio_latch_pb0; |
564 | __le16 gpio_latch_pb1; |
565 | __le16 gpio_latch_pb2; |
566 | __le16 gpio_latch_pb3; |
567 | __le16 gpio_latch_pb4; |
568 | }; |
569 | |
570 | /* |
571 | * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0x49 bytes |
572 | * on a CP2108 chip. |
573 | * |
574 | * See https://www.silabs.com/documents/public/application-notes/an978-cp210x-usb-to-uart-api-specification.pdf |
575 | */ |
576 | struct cp210x_quad_port_config { |
577 | struct cp210x_quad_port_state reset_state; |
578 | struct cp210x_quad_port_state suspend_state; |
579 | u8 ipdelay_ifc[4]; |
580 | u8 enhancedfxn_ifc[4]; |
581 | u8 enhancedfxn_device; |
582 | u8 extclkfreq[4]; |
583 | } __packed; |
584 | |
585 | #define CP2108_EF_IFC_GPIO_TXLED 0x01 |
586 | #define CP2108_EF_IFC_GPIO_RXLED 0x02 |
587 | #define CP2108_EF_IFC_GPIO_RS485 0x04 |
588 | #define CP2108_EF_IFC_GPIO_RS485_LOGIC 0x08 |
589 | #define CP2108_EF_IFC_GPIO_CLOCK 0x10 |
590 | #define CP2108_EF_IFC_DYNAMIC_SUSPEND 0x40 |
591 | |
592 | /* CP2102N configuration array indices */ |
593 | #define CP210X_2NCONFIG_CONFIG_VERSION_IDX 2 |
594 | #define CP210X_2NCONFIG_GPIO_MODE_IDX 581 |
595 | #define CP210X_2NCONFIG_GPIO_RSTLATCH_IDX 587 |
596 | #define CP210X_2NCONFIG_GPIO_CONTROL_IDX 600 |
597 | |
598 | /* CP2102N QFN20 port configuration values */ |
599 | #define CP2102N_QFN20_GPIO2_TXLED_MODE BIT(2) |
600 | #define CP2102N_QFN20_GPIO3_RXLED_MODE BIT(3) |
601 | #define CP2102N_QFN20_GPIO1_RS485_MODE BIT(4) |
602 | #define CP2102N_QFN20_GPIO0_CLK_MODE BIT(6) |
603 | |
604 | /* |
605 | * CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x02 bytes |
606 | * for CP2102N, CP2103, CP2104 and CP2105. |
607 | */ |
608 | struct cp210x_gpio_write { |
609 | u8 mask; |
610 | u8 state; |
611 | }; |
612 | |
613 | /* |
614 | * CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x04 bytes |
615 | * for CP2108. |
616 | */ |
617 | struct cp210x_gpio_write16 { |
618 | __le16 mask; |
619 | __le16 state; |
620 | }; |
621 | |
622 | /* |
623 | * Helper to get interface number when we only have struct usb_serial. |
624 | */ |
625 | static u8 cp210x_interface_num(struct usb_serial *serial) |
626 | { |
627 | struct usb_host_interface *cur_altsetting; |
628 | |
629 | cur_altsetting = serial->interface->cur_altsetting; |
630 | |
631 | return cur_altsetting->desc.bInterfaceNumber; |
632 | } |
633 | |
634 | /* |
635 | * Reads a variable-sized block of CP210X_ registers, identified by req. |
636 | * Returns data into buf in native USB byte order. |
637 | */ |
638 | static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req, |
639 | void *buf, int bufsize) |
640 | { |
641 | struct usb_serial *serial = port->serial; |
642 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
643 | int result; |
644 | |
645 | |
646 | result = usb_control_msg_recv(dev: serial->dev, endpoint: 0, request: req, |
647 | REQTYPE_INTERFACE_TO_HOST, value: 0, |
648 | index: port_priv->bInterfaceNumber, data: buf, size: bufsize, |
649 | USB_CTRL_SET_TIMEOUT, GFP_KERNEL); |
650 | if (result) { |
651 | dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n" , |
652 | req, bufsize, result); |
653 | return result; |
654 | } |
655 | |
656 | return 0; |
657 | } |
658 | |
659 | /* |
660 | * Reads any 8-bit CP210X_ register identified by req. |
661 | */ |
662 | static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val) |
663 | { |
664 | return cp210x_read_reg_block(port, req, buf: val, bufsize: sizeof(*val)); |
665 | } |
666 | |
667 | /* |
668 | * Reads a variable-sized vendor block of CP210X_ registers, identified by val. |
669 | * Returns data into buf in native USB byte order. |
670 | */ |
671 | static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val, |
672 | void *buf, int bufsize) |
673 | { |
674 | int result; |
675 | |
676 | result = usb_control_msg_recv(dev: serial->dev, endpoint: 0, CP210X_VENDOR_SPECIFIC, |
677 | requesttype: type, value: val, index: cp210x_interface_num(serial), data: buf, size: bufsize, |
678 | USB_CTRL_GET_TIMEOUT, GFP_KERNEL); |
679 | if (result) { |
680 | dev_err(&serial->interface->dev, |
681 | "failed to get vendor val 0x%04x size %d: %d\n" , val, |
682 | bufsize, result); |
683 | return result; |
684 | } |
685 | |
686 | return 0; |
687 | } |
688 | |
689 | /* |
690 | * Writes any 16-bit CP210X_ register (req) whose value is passed |
691 | * entirely in the wValue field of the USB request. |
692 | */ |
693 | static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val) |
694 | { |
695 | struct usb_serial *serial = port->serial; |
696 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
697 | int result; |
698 | |
699 | result = usb_control_msg(dev: serial->dev, usb_sndctrlpipe(serial->dev, 0), |
700 | request: req, REQTYPE_HOST_TO_INTERFACE, value: val, |
701 | index: port_priv->bInterfaceNumber, NULL, size: 0, |
702 | USB_CTRL_SET_TIMEOUT); |
703 | if (result < 0) { |
704 | dev_err(&port->dev, "failed set request 0x%x status: %d\n" , |
705 | req, result); |
706 | } |
707 | |
708 | return result; |
709 | } |
710 | |
711 | /* |
712 | * Writes a variable-sized block of CP210X_ registers, identified by req. |
713 | * Data in buf must be in native USB byte order. |
714 | */ |
715 | static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req, |
716 | void *buf, int bufsize) |
717 | { |
718 | struct usb_serial *serial = port->serial; |
719 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
720 | int result; |
721 | |
722 | result = usb_control_msg_send(dev: serial->dev, endpoint: 0, request: req, |
723 | REQTYPE_HOST_TO_INTERFACE, value: 0, |
724 | index: port_priv->bInterfaceNumber, data: buf, size: bufsize, |
725 | USB_CTRL_SET_TIMEOUT, GFP_KERNEL); |
726 | if (result) { |
727 | dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n" , |
728 | req, bufsize, result); |
729 | return result; |
730 | } |
731 | |
732 | return 0; |
733 | } |
734 | |
735 | /* |
736 | * Writes any 32-bit CP210X_ register identified by req. |
737 | */ |
738 | static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val) |
739 | { |
740 | __le32 le32_val; |
741 | |
742 | le32_val = cpu_to_le32(val); |
743 | |
744 | return cp210x_write_reg_block(port, req, buf: &le32_val, bufsize: sizeof(le32_val)); |
745 | } |
746 | |
747 | #ifdef CONFIG_GPIOLIB |
748 | /* |
749 | * Writes a variable-sized vendor block of CP210X_ registers, identified by val. |
750 | * Data in buf must be in native USB byte order. |
751 | */ |
752 | static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type, |
753 | u16 val, void *buf, int bufsize) |
754 | { |
755 | int result; |
756 | |
757 | result = usb_control_msg_send(dev: serial->dev, endpoint: 0, CP210X_VENDOR_SPECIFIC, |
758 | requesttype: type, value: val, index: cp210x_interface_num(serial), data: buf, size: bufsize, |
759 | USB_CTRL_SET_TIMEOUT, GFP_KERNEL); |
760 | if (result) { |
761 | dev_err(&serial->interface->dev, |
762 | "failed to set vendor val 0x%04x size %d: %d\n" , val, |
763 | bufsize, result); |
764 | return result; |
765 | } |
766 | |
767 | return 0; |
768 | } |
769 | #endif |
770 | |
771 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
772 | { |
773 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
774 | int result; |
775 | |
776 | result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE); |
777 | if (result) { |
778 | dev_err(&port->dev, "%s - Unable to enable UART\n" , __func__); |
779 | return result; |
780 | } |
781 | |
782 | if (tty) |
783 | cp210x_set_termios(tty, port, NULL); |
784 | |
785 | result = usb_serial_generic_open(tty, port); |
786 | if (result) |
787 | goto err_disable; |
788 | |
789 | return 0; |
790 | |
791 | err_disable: |
792 | cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); |
793 | port_priv->event_mode = false; |
794 | |
795 | return result; |
796 | } |
797 | |
798 | static void cp210x_close(struct usb_serial_port *port) |
799 | { |
800 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
801 | |
802 | usb_serial_generic_close(port); |
803 | |
804 | /* Clear both queues; cp2108 needs this to avoid an occasional hang */ |
805 | cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL); |
806 | |
807 | cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); |
808 | |
809 | /* Disabling the interface disables event-insertion mode. */ |
810 | port_priv->event_mode = false; |
811 | } |
812 | |
813 | static void cp210x_process_lsr(struct usb_serial_port *port, unsigned char lsr, char *flag) |
814 | { |
815 | if (lsr & CP210X_LSR_BREAK) { |
816 | port->icount.brk++; |
817 | *flag = TTY_BREAK; |
818 | } else if (lsr & CP210X_LSR_PARITY) { |
819 | port->icount.parity++; |
820 | *flag = TTY_PARITY; |
821 | } else if (lsr & CP210X_LSR_FRAME) { |
822 | port->icount.frame++; |
823 | *flag = TTY_FRAME; |
824 | } |
825 | |
826 | if (lsr & CP210X_LSR_OVERRUN) { |
827 | port->icount.overrun++; |
828 | tty_insert_flip_char(port: &port->port, ch: 0, TTY_OVERRUN); |
829 | } |
830 | } |
831 | |
832 | static bool cp210x_process_char(struct usb_serial_port *port, unsigned char *ch, char *flag) |
833 | { |
834 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
835 | |
836 | switch (port_priv->event_state) { |
837 | case ES_DATA: |
838 | if (*ch == CP210X_ESCCHAR) { |
839 | port_priv->event_state = ES_ESCAPE; |
840 | break; |
841 | } |
842 | return false; |
843 | case ES_ESCAPE: |
844 | switch (*ch) { |
845 | case 0: |
846 | dev_dbg(&port->dev, "%s - escape char\n" , __func__); |
847 | *ch = CP210X_ESCCHAR; |
848 | port_priv->event_state = ES_DATA; |
849 | return false; |
850 | case 1: |
851 | port_priv->event_state = ES_LSR_DATA_0; |
852 | break; |
853 | case 2: |
854 | port_priv->event_state = ES_LSR; |
855 | break; |
856 | case 3: |
857 | port_priv->event_state = ES_MSR; |
858 | break; |
859 | default: |
860 | dev_err(&port->dev, "malformed event 0x%02x\n" , *ch); |
861 | port_priv->event_state = ES_DATA; |
862 | break; |
863 | } |
864 | break; |
865 | case ES_LSR_DATA_0: |
866 | port_priv->lsr = *ch; |
867 | port_priv->event_state = ES_LSR_DATA_1; |
868 | break; |
869 | case ES_LSR_DATA_1: |
870 | dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n" , |
871 | __func__, port_priv->lsr, *ch); |
872 | cp210x_process_lsr(port, lsr: port_priv->lsr, flag); |
873 | port_priv->event_state = ES_DATA; |
874 | return false; |
875 | case ES_LSR: |
876 | dev_dbg(&port->dev, "%s - lsr = 0x%02x\n" , __func__, *ch); |
877 | port_priv->lsr = *ch; |
878 | cp210x_process_lsr(port, lsr: port_priv->lsr, flag); |
879 | port_priv->event_state = ES_DATA; |
880 | break; |
881 | case ES_MSR: |
882 | dev_dbg(&port->dev, "%s - msr = 0x%02x\n" , __func__, *ch); |
883 | /* unimplemented */ |
884 | port_priv->event_state = ES_DATA; |
885 | break; |
886 | } |
887 | |
888 | return true; |
889 | } |
890 | |
891 | static void cp210x_process_read_urb(struct urb *urb) |
892 | { |
893 | struct usb_serial_port *port = urb->context; |
894 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
895 | unsigned char *ch = urb->transfer_buffer; |
896 | char flag; |
897 | int i; |
898 | |
899 | if (!urb->actual_length) |
900 | return; |
901 | |
902 | if (port_priv->event_mode) { |
903 | for (i = 0; i < urb->actual_length; i++, ch++) { |
904 | flag = TTY_NORMAL; |
905 | |
906 | if (cp210x_process_char(port, ch, flag: &flag)) |
907 | continue; |
908 | |
909 | tty_insert_flip_char(port: &port->port, ch: *ch, flag); |
910 | } |
911 | } else { |
912 | tty_insert_flip_string(port: &port->port, chars: ch, size: urb->actual_length); |
913 | } |
914 | tty_flip_buffer_push(port: &port->port); |
915 | } |
916 | |
917 | /* |
918 | * Read how many bytes are waiting in the TX queue. |
919 | */ |
920 | static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port, |
921 | u32 *count) |
922 | { |
923 | struct usb_serial *serial = port->serial; |
924 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
925 | struct cp210x_comm_status sts; |
926 | int result; |
927 | |
928 | result = usb_control_msg_recv(dev: serial->dev, endpoint: 0, CP210X_GET_COMM_STATUS, |
929 | REQTYPE_INTERFACE_TO_HOST, value: 0, |
930 | index: port_priv->bInterfaceNumber, data: &sts, size: sizeof(sts), |
931 | USB_CTRL_GET_TIMEOUT, GFP_KERNEL); |
932 | if (result) { |
933 | dev_err(&port->dev, "failed to get comm status: %d\n" , result); |
934 | return result; |
935 | } |
936 | |
937 | *count = le32_to_cpu(sts.ulAmountInOutQueue); |
938 | |
939 | return 0; |
940 | } |
941 | |
942 | static bool cp210x_tx_empty(struct usb_serial_port *port) |
943 | { |
944 | int err; |
945 | u32 count; |
946 | |
947 | err = cp210x_get_tx_queue_byte_count(port, count: &count); |
948 | if (err) |
949 | return true; |
950 | |
951 | return !count; |
952 | } |
953 | |
954 | struct cp210x_rate { |
955 | speed_t rate; |
956 | speed_t high; |
957 | }; |
958 | |
959 | static const struct cp210x_rate cp210x_an205_table1[] = { |
960 | { 300, 300 }, |
961 | { 600, 600 }, |
962 | { 1200, 1200 }, |
963 | { 1800, 1800 }, |
964 | { 2400, 2400 }, |
965 | { 4000, 4000 }, |
966 | { 4800, 4803 }, |
967 | { 7200, 7207 }, |
968 | { 9600, 9612 }, |
969 | { 14400, 14428 }, |
970 | { 16000, 16062 }, |
971 | { 19200, 19250 }, |
972 | { 28800, 28912 }, |
973 | { 38400, 38601 }, |
974 | { 51200, 51558 }, |
975 | { 56000, 56280 }, |
976 | { 57600, 58053 }, |
977 | { 64000, 64111 }, |
978 | { 76800, 77608 }, |
979 | { 115200, 117028 }, |
980 | { 128000, 129347 }, |
981 | { 153600, 156868 }, |
982 | { 230400, 237832 }, |
983 | { 250000, 254234 }, |
984 | { 256000, 273066 }, |
985 | { 460800, 491520 }, |
986 | { 500000, 567138 }, |
987 | { 576000, 670254 }, |
988 | { 921600, UINT_MAX } |
989 | }; |
990 | |
991 | /* |
992 | * Quantises the baud rate as per AN205 Table 1 |
993 | */ |
994 | static speed_t cp210x_get_an205_rate(speed_t baud) |
995 | { |
996 | int i; |
997 | |
998 | for (i = 0; i < ARRAY_SIZE(cp210x_an205_table1); ++i) { |
999 | if (baud <= cp210x_an205_table1[i].high) |
1000 | break; |
1001 | } |
1002 | |
1003 | return cp210x_an205_table1[i].rate; |
1004 | } |
1005 | |
1006 | static speed_t cp210x_get_actual_rate(speed_t baud) |
1007 | { |
1008 | unsigned int prescale = 1; |
1009 | unsigned int div; |
1010 | |
1011 | if (baud <= 365) |
1012 | prescale = 4; |
1013 | |
1014 | div = DIV_ROUND_CLOSEST(48000000, 2 * prescale * baud); |
1015 | baud = 48000000 / (2 * prescale * div); |
1016 | |
1017 | return baud; |
1018 | } |
1019 | |
1020 | /* |
1021 | * CP2101 supports the following baud rates: |
1022 | * |
1023 | * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, |
1024 | * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 |
1025 | * |
1026 | * CP2102 and CP2103 support the following additional rates: |
1027 | * |
1028 | * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, |
1029 | * 576000 |
1030 | * |
1031 | * The device will map a requested rate to a supported one, but the result |
1032 | * of requests for rates greater than 1053257 is undefined (see AN205). |
1033 | * |
1034 | * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, |
1035 | * respectively, with an error less than 1%. The actual rates are determined |
1036 | * by |
1037 | * |
1038 | * div = round(freq / (2 x prescale x request)) |
1039 | * actual = freq / (2 x prescale x div) |
1040 | * |
1041 | * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps |
1042 | * or 1 otherwise. |
1043 | * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 |
1044 | * otherwise. |
1045 | */ |
1046 | static void cp210x_change_speed(struct tty_struct *tty, |
1047 | struct usb_serial_port *port, |
1048 | const struct ktermios *old_termios) |
1049 | { |
1050 | struct usb_serial *serial = port->serial; |
1051 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1052 | u32 baud; |
1053 | |
1054 | if (tty->termios.c_ospeed == 0) |
1055 | return; |
1056 | |
1057 | /* |
1058 | * This maps the requested rate to the actual rate, a valid rate on |
1059 | * cp2102 or cp2103, or to an arbitrary rate in [1M, max_speed]. |
1060 | */ |
1061 | baud = clamp(tty->termios.c_ospeed, priv->min_speed, priv->max_speed); |
1062 | |
1063 | if (priv->use_actual_rate) |
1064 | baud = cp210x_get_actual_rate(baud); |
1065 | else if (baud < 1000000) |
1066 | baud = cp210x_get_an205_rate(baud); |
1067 | |
1068 | dev_dbg(&port->dev, "%s - setting baud rate to %u\n" , __func__, baud); |
1069 | if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, val: baud)) { |
1070 | dev_warn(&port->dev, "failed to set baud rate to %u\n" , baud); |
1071 | if (old_termios) |
1072 | baud = old_termios->c_ospeed; |
1073 | else |
1074 | baud = 9600; |
1075 | } |
1076 | |
1077 | tty_encode_baud_rate(tty, ibaud: baud, obaud: baud); |
1078 | } |
1079 | |
1080 | static void cp210x_enable_event_mode(struct usb_serial_port *port) |
1081 | { |
1082 | struct cp210x_serial_private *priv = usb_get_serial_data(serial: port->serial); |
1083 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
1084 | int ret; |
1085 | |
1086 | if (port_priv->event_mode) |
1087 | return; |
1088 | |
1089 | if (priv->no_event_mode) |
1090 | return; |
1091 | |
1092 | port_priv->event_state = ES_DATA; |
1093 | port_priv->event_mode = true; |
1094 | |
1095 | ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, CP210X_ESCCHAR); |
1096 | if (ret) { |
1097 | dev_err(&port->dev, "failed to enable events: %d\n" , ret); |
1098 | port_priv->event_mode = false; |
1099 | } |
1100 | } |
1101 | |
1102 | static void cp210x_disable_event_mode(struct usb_serial_port *port) |
1103 | { |
1104 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
1105 | int ret; |
1106 | |
1107 | if (!port_priv->event_mode) |
1108 | return; |
1109 | |
1110 | ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, val: 0); |
1111 | if (ret) { |
1112 | dev_err(&port->dev, "failed to disable events: %d\n" , ret); |
1113 | return; |
1114 | } |
1115 | |
1116 | port_priv->event_mode = false; |
1117 | } |
1118 | |
1119 | static bool cp210x_termios_change(const struct ktermios *a, const struct ktermios *b) |
1120 | { |
1121 | bool iflag_change, cc_change; |
1122 | |
1123 | iflag_change = ((a->c_iflag ^ b->c_iflag) & (INPCK | IXON | IXOFF)); |
1124 | cc_change = a->c_cc[VSTART] != b->c_cc[VSTART] || |
1125 | a->c_cc[VSTOP] != b->c_cc[VSTOP]; |
1126 | |
1127 | return tty_termios_hw_change(a, b) || iflag_change || cc_change; |
1128 | } |
1129 | |
1130 | static void cp210x_set_flow_control(struct tty_struct *tty, |
1131 | struct usb_serial_port *port, |
1132 | const struct ktermios *old_termios) |
1133 | { |
1134 | struct cp210x_serial_private *priv = usb_get_serial_data(serial: port->serial); |
1135 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
1136 | struct cp210x_special_chars chars; |
1137 | struct cp210x_flow_ctl flow_ctl; |
1138 | u32 flow_repl; |
1139 | u32 ctl_hs; |
1140 | bool crtscts; |
1141 | int ret; |
1142 | |
1143 | /* |
1144 | * Some CP2102N interpret ulXonLimit as ulFlowReplace (erratum |
1145 | * CP2102N_E104). Report back that flow control is not supported. |
1146 | */ |
1147 | if (priv->no_flow_control) { |
1148 | tty->termios.c_cflag &= ~CRTSCTS; |
1149 | tty->termios.c_iflag &= ~(IXON | IXOFF); |
1150 | } |
1151 | |
1152 | if (tty->termios.c_ospeed != 0 && |
1153 | old_termios && old_termios->c_ospeed != 0 && |
1154 | C_CRTSCTS(tty) == (old_termios->c_cflag & CRTSCTS) && |
1155 | I_IXON(tty) == (old_termios->c_iflag & IXON) && |
1156 | I_IXOFF(tty) == (old_termios->c_iflag & IXOFF) && |
1157 | START_CHAR(tty) == old_termios->c_cc[VSTART] && |
1158 | STOP_CHAR(tty) == old_termios->c_cc[VSTOP]) { |
1159 | return; |
1160 | } |
1161 | |
1162 | if (I_IXON(tty) || I_IXOFF(tty)) { |
1163 | memset(&chars, 0, sizeof(chars)); |
1164 | |
1165 | chars.bXonChar = START_CHAR(tty); |
1166 | chars.bXoffChar = STOP_CHAR(tty); |
1167 | |
1168 | ret = cp210x_write_reg_block(port, CP210X_SET_CHARS, buf: &chars, |
1169 | bufsize: sizeof(chars)); |
1170 | if (ret) { |
1171 | dev_err(&port->dev, "failed to set special chars: %d\n" , |
1172 | ret); |
1173 | } |
1174 | } |
1175 | |
1176 | mutex_lock(&port_priv->mutex); |
1177 | |
1178 | if (tty->termios.c_ospeed == 0) { |
1179 | port_priv->dtr = false; |
1180 | port_priv->rts = false; |
1181 | } else if (old_termios && old_termios->c_ospeed == 0) { |
1182 | port_priv->dtr = true; |
1183 | port_priv->rts = true; |
1184 | } |
1185 | |
1186 | ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, buf: &flow_ctl, |
1187 | bufsize: sizeof(flow_ctl)); |
1188 | if (ret) |
1189 | goto out_unlock; |
1190 | |
1191 | ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); |
1192 | flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); |
1193 | |
1194 | ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE; |
1195 | ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE; |
1196 | ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY; |
1197 | ctl_hs &= ~CP210X_SERIAL_DTR_MASK; |
1198 | if (port_priv->dtr) |
1199 | ctl_hs |= CP210X_SERIAL_DTR_ACTIVE; |
1200 | else |
1201 | ctl_hs |= CP210X_SERIAL_DTR_INACTIVE; |
1202 | |
1203 | flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
1204 | if (C_CRTSCTS(tty)) { |
1205 | ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE; |
1206 | if (port_priv->rts) |
1207 | flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL; |
1208 | else |
1209 | flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
1210 | crtscts = true; |
1211 | } else { |
1212 | ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE; |
1213 | if (port_priv->rts) |
1214 | flow_repl |= CP210X_SERIAL_RTS_ACTIVE; |
1215 | else |
1216 | flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
1217 | crtscts = false; |
1218 | } |
1219 | |
1220 | if (I_IXOFF(tty)) { |
1221 | flow_repl |= CP210X_SERIAL_AUTO_RECEIVE; |
1222 | |
1223 | flow_ctl.ulXonLimit = cpu_to_le32(128); |
1224 | flow_ctl.ulXoffLimit = cpu_to_le32(128); |
1225 | } else { |
1226 | flow_repl &= ~CP210X_SERIAL_AUTO_RECEIVE; |
1227 | } |
1228 | |
1229 | if (I_IXON(tty)) |
1230 | flow_repl |= CP210X_SERIAL_AUTO_TRANSMIT; |
1231 | else |
1232 | flow_repl &= ~CP210X_SERIAL_AUTO_TRANSMIT; |
1233 | |
1234 | dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n" , __func__, |
1235 | ctl_hs, flow_repl); |
1236 | |
1237 | flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs); |
1238 | flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); |
1239 | |
1240 | ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, buf: &flow_ctl, |
1241 | bufsize: sizeof(flow_ctl)); |
1242 | if (ret) |
1243 | goto out_unlock; |
1244 | |
1245 | port_priv->crtscts = crtscts; |
1246 | out_unlock: |
1247 | mutex_unlock(lock: &port_priv->mutex); |
1248 | } |
1249 | |
1250 | static void cp210x_set_termios(struct tty_struct *tty, |
1251 | struct usb_serial_port *port, |
1252 | const struct ktermios *old_termios) |
1253 | { |
1254 | struct cp210x_serial_private *priv = usb_get_serial_data(serial: port->serial); |
1255 | u16 bits; |
1256 | int ret; |
1257 | |
1258 | if (old_termios && !cp210x_termios_change(a: &tty->termios, b: old_termios) && |
1259 | tty->termios.c_ospeed != 0) |
1260 | return; |
1261 | |
1262 | if (!old_termios || tty->termios.c_ospeed != old_termios->c_ospeed) |
1263 | cp210x_change_speed(tty, port, old_termios); |
1264 | |
1265 | /* CP2101 only supports CS8, 1 stop bit and non-stick parity. */ |
1266 | if (priv->partnum == CP210X_PARTNUM_CP2101) { |
1267 | tty->termios.c_cflag &= ~(CSIZE | CSTOPB | CMSPAR); |
1268 | tty->termios.c_cflag |= CS8; |
1269 | } |
1270 | |
1271 | bits = 0; |
1272 | |
1273 | switch (C_CSIZE(tty)) { |
1274 | case CS5: |
1275 | bits |= BITS_DATA_5; |
1276 | break; |
1277 | case CS6: |
1278 | bits |= BITS_DATA_6; |
1279 | break; |
1280 | case CS7: |
1281 | bits |= BITS_DATA_7; |
1282 | break; |
1283 | case CS8: |
1284 | default: |
1285 | bits |= BITS_DATA_8; |
1286 | break; |
1287 | } |
1288 | |
1289 | if (C_PARENB(tty)) { |
1290 | if (C_CMSPAR(tty)) { |
1291 | if (C_PARODD(tty)) |
1292 | bits |= BITS_PARITY_MARK; |
1293 | else |
1294 | bits |= BITS_PARITY_SPACE; |
1295 | } else { |
1296 | if (C_PARODD(tty)) |
1297 | bits |= BITS_PARITY_ODD; |
1298 | else |
1299 | bits |= BITS_PARITY_EVEN; |
1300 | } |
1301 | } |
1302 | |
1303 | if (C_CSTOPB(tty)) |
1304 | bits |= BITS_STOP_2; |
1305 | else |
1306 | bits |= BITS_STOP_1; |
1307 | |
1308 | ret = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, val: bits); |
1309 | if (ret) |
1310 | dev_err(&port->dev, "failed to set line control: %d\n" , ret); |
1311 | |
1312 | cp210x_set_flow_control(tty, port, old_termios); |
1313 | |
1314 | /* |
1315 | * Enable event-insertion mode only if input parity checking is |
1316 | * enabled for now. |
1317 | */ |
1318 | if (I_INPCK(tty)) |
1319 | cp210x_enable_event_mode(port); |
1320 | else |
1321 | cp210x_disable_event_mode(port); |
1322 | } |
1323 | |
1324 | static int cp210x_tiocmset(struct tty_struct *tty, |
1325 | unsigned int set, unsigned int clear) |
1326 | { |
1327 | struct usb_serial_port *port = tty->driver_data; |
1328 | return cp210x_tiocmset_port(port, set, clear); |
1329 | } |
1330 | |
1331 | static int cp210x_tiocmset_port(struct usb_serial_port *port, |
1332 | unsigned int set, unsigned int clear) |
1333 | { |
1334 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
1335 | struct cp210x_flow_ctl flow_ctl; |
1336 | u32 ctl_hs, flow_repl; |
1337 | u16 control = 0; |
1338 | int ret; |
1339 | |
1340 | mutex_lock(&port_priv->mutex); |
1341 | |
1342 | if (set & TIOCM_RTS) { |
1343 | port_priv->rts = true; |
1344 | control |= CONTROL_RTS; |
1345 | control |= CONTROL_WRITE_RTS; |
1346 | } |
1347 | if (set & TIOCM_DTR) { |
1348 | port_priv->dtr = true; |
1349 | control |= CONTROL_DTR; |
1350 | control |= CONTROL_WRITE_DTR; |
1351 | } |
1352 | if (clear & TIOCM_RTS) { |
1353 | port_priv->rts = false; |
1354 | control &= ~CONTROL_RTS; |
1355 | control |= CONTROL_WRITE_RTS; |
1356 | } |
1357 | if (clear & TIOCM_DTR) { |
1358 | port_priv->dtr = false; |
1359 | control &= ~CONTROL_DTR; |
1360 | control |= CONTROL_WRITE_DTR; |
1361 | } |
1362 | |
1363 | /* |
1364 | * Use SET_FLOW to set DTR and enable/disable auto-RTS when hardware |
1365 | * flow control is enabled. |
1366 | */ |
1367 | if (port_priv->crtscts && control & CONTROL_WRITE_RTS) { |
1368 | ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, buf: &flow_ctl, |
1369 | bufsize: sizeof(flow_ctl)); |
1370 | if (ret) |
1371 | goto out_unlock; |
1372 | |
1373 | ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); |
1374 | flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); |
1375 | |
1376 | ctl_hs &= ~CP210X_SERIAL_DTR_MASK; |
1377 | if (port_priv->dtr) |
1378 | ctl_hs |= CP210X_SERIAL_DTR_ACTIVE; |
1379 | else |
1380 | ctl_hs |= CP210X_SERIAL_DTR_INACTIVE; |
1381 | |
1382 | flow_repl &= ~CP210X_SERIAL_RTS_MASK; |
1383 | if (port_priv->rts) |
1384 | flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL; |
1385 | else |
1386 | flow_repl |= CP210X_SERIAL_RTS_INACTIVE; |
1387 | |
1388 | flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs); |
1389 | flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); |
1390 | |
1391 | dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n" , |
1392 | __func__, ctl_hs, flow_repl); |
1393 | |
1394 | ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, buf: &flow_ctl, |
1395 | bufsize: sizeof(flow_ctl)); |
1396 | } else { |
1397 | dev_dbg(&port->dev, "%s - control = 0x%04x\n" , __func__, control); |
1398 | |
1399 | ret = cp210x_write_u16_reg(port, CP210X_SET_MHS, val: control); |
1400 | } |
1401 | out_unlock: |
1402 | mutex_unlock(lock: &port_priv->mutex); |
1403 | |
1404 | return ret; |
1405 | } |
1406 | |
1407 | static void cp210x_dtr_rts(struct usb_serial_port *port, int on) |
1408 | { |
1409 | if (on) |
1410 | cp210x_tiocmset_port(port, TIOCM_DTR | TIOCM_RTS, clear: 0); |
1411 | else |
1412 | cp210x_tiocmset_port(port, set: 0, TIOCM_DTR | TIOCM_RTS); |
1413 | } |
1414 | |
1415 | static int cp210x_tiocmget(struct tty_struct *tty) |
1416 | { |
1417 | struct usb_serial_port *port = tty->driver_data; |
1418 | u8 control; |
1419 | int result; |
1420 | |
1421 | result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, val: &control); |
1422 | if (result) |
1423 | return result; |
1424 | |
1425 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) |
1426 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) |
1427 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) |
1428 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) |
1429 | |((control & CONTROL_RING)? TIOCM_RI : 0) |
1430 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); |
1431 | |
1432 | dev_dbg(&port->dev, "%s - control = 0x%02x\n" , __func__, control); |
1433 | |
1434 | return result; |
1435 | } |
1436 | |
1437 | static int cp210x_break_ctl(struct tty_struct *tty, int break_state) |
1438 | { |
1439 | struct usb_serial_port *port = tty->driver_data; |
1440 | struct cp210x_serial_private *priv = usb_get_serial_data(serial: port->serial); |
1441 | u16 state; |
1442 | |
1443 | if (priv->partnum == CP210X_PARTNUM_CP2105) { |
1444 | if (cp210x_interface_num(serial: port->serial) == 1) |
1445 | return -ENOTTY; |
1446 | } |
1447 | |
1448 | if (break_state == 0) |
1449 | state = BREAK_OFF; |
1450 | else |
1451 | state = BREAK_ON; |
1452 | |
1453 | dev_dbg(&port->dev, "%s - turning break %s\n" , __func__, |
1454 | state == BREAK_OFF ? "off" : "on" ); |
1455 | |
1456 | return cp210x_write_u16_reg(port, CP210X_SET_BREAK, val: state); |
1457 | } |
1458 | |
1459 | #ifdef CONFIG_GPIOLIB |
1460 | static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio) |
1461 | { |
1462 | struct usb_serial *serial = gpiochip_get_data(gc); |
1463 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1464 | u8 req_type; |
1465 | u16 mask; |
1466 | int result; |
1467 | int len; |
1468 | |
1469 | result = usb_autopm_get_interface(intf: serial->interface); |
1470 | if (result) |
1471 | return result; |
1472 | |
1473 | switch (priv->partnum) { |
1474 | case CP210X_PARTNUM_CP2105: |
1475 | req_type = REQTYPE_INTERFACE_TO_HOST; |
1476 | len = 1; |
1477 | break; |
1478 | case CP210X_PARTNUM_CP2108: |
1479 | req_type = REQTYPE_INTERFACE_TO_HOST; |
1480 | len = 2; |
1481 | break; |
1482 | default: |
1483 | req_type = REQTYPE_DEVICE_TO_HOST; |
1484 | len = 1; |
1485 | break; |
1486 | } |
1487 | |
1488 | mask = 0; |
1489 | result = cp210x_read_vendor_block(serial, type: req_type, CP210X_READ_LATCH, |
1490 | buf: &mask, bufsize: len); |
1491 | |
1492 | usb_autopm_put_interface(intf: serial->interface); |
1493 | |
1494 | if (result < 0) |
1495 | return result; |
1496 | |
1497 | le16_to_cpus(&mask); |
1498 | |
1499 | return !!(mask & BIT(gpio)); |
1500 | } |
1501 | |
1502 | static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value) |
1503 | { |
1504 | struct usb_serial *serial = gpiochip_get_data(gc); |
1505 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1506 | struct cp210x_gpio_write16 buf16; |
1507 | struct cp210x_gpio_write buf; |
1508 | u16 mask, state; |
1509 | u16 wIndex; |
1510 | int result; |
1511 | |
1512 | if (value == 1) |
1513 | state = BIT(gpio); |
1514 | else |
1515 | state = 0; |
1516 | |
1517 | mask = BIT(gpio); |
1518 | |
1519 | result = usb_autopm_get_interface(intf: serial->interface); |
1520 | if (result) |
1521 | goto out; |
1522 | |
1523 | switch (priv->partnum) { |
1524 | case CP210X_PARTNUM_CP2105: |
1525 | buf.mask = (u8)mask; |
1526 | buf.state = (u8)state; |
1527 | result = cp210x_write_vendor_block(serial, |
1528 | REQTYPE_HOST_TO_INTERFACE, |
1529 | CP210X_WRITE_LATCH, buf: &buf, |
1530 | bufsize: sizeof(buf)); |
1531 | break; |
1532 | case CP210X_PARTNUM_CP2108: |
1533 | buf16.mask = cpu_to_le16(mask); |
1534 | buf16.state = cpu_to_le16(state); |
1535 | result = cp210x_write_vendor_block(serial, |
1536 | REQTYPE_HOST_TO_INTERFACE, |
1537 | CP210X_WRITE_LATCH, buf: &buf16, |
1538 | bufsize: sizeof(buf16)); |
1539 | break; |
1540 | default: |
1541 | wIndex = state << 8 | mask; |
1542 | result = usb_control_msg(dev: serial->dev, |
1543 | usb_sndctrlpipe(serial->dev, 0), |
1544 | CP210X_VENDOR_SPECIFIC, |
1545 | REQTYPE_HOST_TO_DEVICE, |
1546 | CP210X_WRITE_LATCH, |
1547 | index: wIndex, |
1548 | NULL, size: 0, USB_CTRL_SET_TIMEOUT); |
1549 | break; |
1550 | } |
1551 | |
1552 | usb_autopm_put_interface(intf: serial->interface); |
1553 | out: |
1554 | if (result < 0) { |
1555 | dev_err(&serial->interface->dev, "failed to set GPIO value: %d\n" , |
1556 | result); |
1557 | } |
1558 | } |
1559 | |
1560 | static int cp210x_gpio_direction_get(struct gpio_chip *gc, unsigned int gpio) |
1561 | { |
1562 | struct usb_serial *serial = gpiochip_get_data(gc); |
1563 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1564 | |
1565 | return priv->gpio_input & BIT(gpio); |
1566 | } |
1567 | |
1568 | static int cp210x_gpio_direction_input(struct gpio_chip *gc, unsigned int gpio) |
1569 | { |
1570 | struct usb_serial *serial = gpiochip_get_data(gc); |
1571 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1572 | |
1573 | if (priv->partnum == CP210X_PARTNUM_CP2105) { |
1574 | /* hardware does not support an input mode */ |
1575 | return -ENOTSUPP; |
1576 | } |
1577 | |
1578 | /* push-pull pins cannot be changed to be inputs */ |
1579 | if (priv->gpio_pushpull & BIT(gpio)) |
1580 | return -EINVAL; |
1581 | |
1582 | /* make sure to release pin if it is being driven low */ |
1583 | cp210x_gpio_set(gc, gpio, value: 1); |
1584 | |
1585 | priv->gpio_input |= BIT(gpio); |
1586 | |
1587 | return 0; |
1588 | } |
1589 | |
1590 | static int cp210x_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio, |
1591 | int value) |
1592 | { |
1593 | struct usb_serial *serial = gpiochip_get_data(gc); |
1594 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1595 | |
1596 | priv->gpio_input &= ~BIT(gpio); |
1597 | cp210x_gpio_set(gc, gpio, value); |
1598 | |
1599 | return 0; |
1600 | } |
1601 | |
1602 | static int cp210x_gpio_set_config(struct gpio_chip *gc, unsigned int gpio, |
1603 | unsigned long config) |
1604 | { |
1605 | struct usb_serial *serial = gpiochip_get_data(gc); |
1606 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1607 | enum pin_config_param param = pinconf_to_config_param(config); |
1608 | |
1609 | /* Succeed only if in correct mode (this can't be set at runtime) */ |
1610 | if ((param == PIN_CONFIG_DRIVE_PUSH_PULL) && |
1611 | (priv->gpio_pushpull & BIT(gpio))) |
1612 | return 0; |
1613 | |
1614 | if ((param == PIN_CONFIG_DRIVE_OPEN_DRAIN) && |
1615 | !(priv->gpio_pushpull & BIT(gpio))) |
1616 | return 0; |
1617 | |
1618 | return -ENOTSUPP; |
1619 | } |
1620 | |
1621 | static int cp210x_gpio_init_valid_mask(struct gpio_chip *gc, |
1622 | unsigned long *valid_mask, unsigned int ngpios) |
1623 | { |
1624 | struct usb_serial *serial = gpiochip_get_data(gc); |
1625 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1626 | struct device *dev = &serial->interface->dev; |
1627 | unsigned long altfunc_mask = priv->gpio_altfunc; |
1628 | |
1629 | bitmap_complement(dst: valid_mask, src: &altfunc_mask, nbits: ngpios); |
1630 | |
1631 | if (bitmap_empty(src: valid_mask, nbits: ngpios)) |
1632 | dev_dbg(dev, "no pin configured for GPIO\n" ); |
1633 | else |
1634 | dev_dbg(dev, "GPIO.%*pbl configured for GPIO\n" , ngpios, |
1635 | valid_mask); |
1636 | return 0; |
1637 | } |
1638 | |
1639 | /* |
1640 | * This function is for configuring GPIO using shared pins, where other signals |
1641 | * are made unavailable by configuring the use of GPIO. This is believed to be |
1642 | * only applicable to the cp2105 at this point, the other devices supported by |
1643 | * this driver that provide GPIO do so in a way that does not impact other |
1644 | * signals and are thus expected to have very different initialisation. |
1645 | */ |
1646 | static int cp2105_gpioconf_init(struct usb_serial *serial) |
1647 | { |
1648 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1649 | struct cp210x_pin_mode mode; |
1650 | struct cp210x_dual_port_config config; |
1651 | u8 intf_num = cp210x_interface_num(serial); |
1652 | u8 iface_config; |
1653 | int result; |
1654 | |
1655 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
1656 | CP210X_GET_DEVICEMODE, buf: &mode, |
1657 | bufsize: sizeof(mode)); |
1658 | if (result < 0) |
1659 | return result; |
1660 | |
1661 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
1662 | CP210X_GET_PORTCONFIG, buf: &config, |
1663 | bufsize: sizeof(config)); |
1664 | if (result < 0) |
1665 | return result; |
1666 | |
1667 | /* 2 banks of GPIO - One for the pins taken from each serial port */ |
1668 | if (intf_num == 0) { |
1669 | priv->gc.ngpio = 2; |
1670 | |
1671 | if (mode.eci == CP210X_PIN_MODE_MODEM) { |
1672 | /* mark all GPIOs of this interface as reserved */ |
1673 | priv->gpio_altfunc = 0xff; |
1674 | return 0; |
1675 | } |
1676 | |
1677 | iface_config = config.eci_cfg; |
1678 | priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
1679 | CP210X_ECI_GPIO_MODE_MASK) >> |
1680 | CP210X_ECI_GPIO_MODE_OFFSET); |
1681 | } else if (intf_num == 1) { |
1682 | priv->gc.ngpio = 3; |
1683 | |
1684 | if (mode.sci == CP210X_PIN_MODE_MODEM) { |
1685 | /* mark all GPIOs of this interface as reserved */ |
1686 | priv->gpio_altfunc = 0xff; |
1687 | return 0; |
1688 | } |
1689 | |
1690 | iface_config = config.sci_cfg; |
1691 | priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
1692 | CP210X_SCI_GPIO_MODE_MASK) >> |
1693 | CP210X_SCI_GPIO_MODE_OFFSET); |
1694 | } else { |
1695 | return -ENODEV; |
1696 | } |
1697 | |
1698 | /* mark all pins which are not in GPIO mode */ |
1699 | if (iface_config & CP2105_GPIO0_TXLED_MODE) /* GPIO 0 */ |
1700 | priv->gpio_altfunc |= BIT(0); |
1701 | if (iface_config & (CP2105_GPIO1_RXLED_MODE | /* GPIO 1 */ |
1702 | CP2105_GPIO1_RS485_MODE)) |
1703 | priv->gpio_altfunc |= BIT(1); |
1704 | |
1705 | /* driver implementation for CP2105 only supports outputs */ |
1706 | priv->gpio_input = 0; |
1707 | |
1708 | return 0; |
1709 | } |
1710 | |
1711 | static int cp2104_gpioconf_init(struct usb_serial *serial) |
1712 | { |
1713 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1714 | struct cp210x_single_port_config config; |
1715 | u8 iface_config; |
1716 | u8 gpio_latch; |
1717 | int result; |
1718 | u8 i; |
1719 | |
1720 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
1721 | CP210X_GET_PORTCONFIG, buf: &config, |
1722 | bufsize: sizeof(config)); |
1723 | if (result < 0) |
1724 | return result; |
1725 | |
1726 | priv->gc.ngpio = 4; |
1727 | |
1728 | iface_config = config.device_cfg; |
1729 | priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) & |
1730 | CP210X_GPIO_MODE_MASK) >> |
1731 | CP210X_GPIO_MODE_OFFSET); |
1732 | gpio_latch = (u8)((le16_to_cpu(config.reset_state) & |
1733 | CP210X_GPIO_MODE_MASK) >> |
1734 | CP210X_GPIO_MODE_OFFSET); |
1735 | |
1736 | /* mark all pins which are not in GPIO mode */ |
1737 | if (iface_config & CP2104_GPIO0_TXLED_MODE) /* GPIO 0 */ |
1738 | priv->gpio_altfunc |= BIT(0); |
1739 | if (iface_config & CP2104_GPIO1_RXLED_MODE) /* GPIO 1 */ |
1740 | priv->gpio_altfunc |= BIT(1); |
1741 | if (iface_config & CP2104_GPIO2_RS485_MODE) /* GPIO 2 */ |
1742 | priv->gpio_altfunc |= BIT(2); |
1743 | |
1744 | /* |
1745 | * Like CP2102N, CP2104 has also no strict input and output pin |
1746 | * modes. |
1747 | * Do the same input mode emulation as CP2102N. |
1748 | */ |
1749 | for (i = 0; i < priv->gc.ngpio; ++i) { |
1750 | /* |
1751 | * Set direction to "input" iff pin is open-drain and reset |
1752 | * value is 1. |
1753 | */ |
1754 | if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i))) |
1755 | priv->gpio_input |= BIT(i); |
1756 | } |
1757 | |
1758 | return 0; |
1759 | } |
1760 | |
1761 | static int cp2108_gpio_init(struct usb_serial *serial) |
1762 | { |
1763 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1764 | struct cp210x_quad_port_config config; |
1765 | u16 gpio_latch; |
1766 | int result; |
1767 | u8 i; |
1768 | |
1769 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
1770 | CP210X_GET_PORTCONFIG, buf: &config, |
1771 | bufsize: sizeof(config)); |
1772 | if (result < 0) |
1773 | return result; |
1774 | |
1775 | priv->gc.ngpio = 16; |
1776 | priv->gpio_pushpull = le16_to_cpu(config.reset_state.gpio_mode_pb1); |
1777 | gpio_latch = le16_to_cpu(config.reset_state.gpio_latch_pb1); |
1778 | |
1779 | /* |
1780 | * Mark all pins which are not in GPIO mode. |
1781 | * |
1782 | * Refer to table 9.1 "GPIO Mode alternate Functions" in the datasheet: |
1783 | * https://www.silabs.com/documents/public/data-sheets/cp2108-datasheet.pdf |
1784 | * |
1785 | * Alternate functions of GPIO0 to GPIO3 are determine by enhancedfxn_ifc[0] |
1786 | * and the similarly for the other pins; enhancedfxn_ifc[1]: GPIO4 to GPIO7, |
1787 | * enhancedfxn_ifc[2]: GPIO8 to GPIO11, enhancedfxn_ifc[3]: GPIO12 to GPIO15. |
1788 | */ |
1789 | for (i = 0; i < 4; i++) { |
1790 | if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_TXLED) |
1791 | priv->gpio_altfunc |= BIT(i * 4); |
1792 | if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_RXLED) |
1793 | priv->gpio_altfunc |= BIT((i * 4) + 1); |
1794 | if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_RS485) |
1795 | priv->gpio_altfunc |= BIT((i * 4) + 2); |
1796 | if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_CLOCK) |
1797 | priv->gpio_altfunc |= BIT((i * 4) + 3); |
1798 | } |
1799 | |
1800 | /* |
1801 | * Like CP2102N, CP2108 has also no strict input and output pin |
1802 | * modes. Do the same input mode emulation as CP2102N. |
1803 | */ |
1804 | for (i = 0; i < priv->gc.ngpio; ++i) { |
1805 | /* |
1806 | * Set direction to "input" iff pin is open-drain and reset |
1807 | * value is 1. |
1808 | */ |
1809 | if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i))) |
1810 | priv->gpio_input |= BIT(i); |
1811 | } |
1812 | |
1813 | return 0; |
1814 | } |
1815 | |
1816 | static int cp2102n_gpioconf_init(struct usb_serial *serial) |
1817 | { |
1818 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1819 | const u16 config_size = 0x02a6; |
1820 | u8 gpio_rst_latch; |
1821 | u8 config_version; |
1822 | u8 gpio_pushpull; |
1823 | u8 *config_buf; |
1824 | u8 gpio_latch; |
1825 | u8 gpio_ctrl; |
1826 | int result; |
1827 | u8 i; |
1828 | |
1829 | /* |
1830 | * Retrieve device configuration from the device. |
1831 | * The array received contains all customization settings done at the |
1832 | * factory/manufacturer. Format of the array is documented at the |
1833 | * time of writing at: |
1834 | * https://www.silabs.com/community/interface/knowledge-base.entry.html/2017/03/31/cp2102n_setconfig-xsfa |
1835 | */ |
1836 | config_buf = kmalloc(size: config_size, GFP_KERNEL); |
1837 | if (!config_buf) |
1838 | return -ENOMEM; |
1839 | |
1840 | result = cp210x_read_vendor_block(serial, |
1841 | REQTYPE_DEVICE_TO_HOST, |
1842 | CP210X_READ_2NCONFIG, |
1843 | buf: config_buf, |
1844 | bufsize: config_size); |
1845 | if (result < 0) { |
1846 | kfree(objp: config_buf); |
1847 | return result; |
1848 | } |
1849 | |
1850 | config_version = config_buf[CP210X_2NCONFIG_CONFIG_VERSION_IDX]; |
1851 | gpio_pushpull = config_buf[CP210X_2NCONFIG_GPIO_MODE_IDX]; |
1852 | gpio_ctrl = config_buf[CP210X_2NCONFIG_GPIO_CONTROL_IDX]; |
1853 | gpio_rst_latch = config_buf[CP210X_2NCONFIG_GPIO_RSTLATCH_IDX]; |
1854 | |
1855 | kfree(objp: config_buf); |
1856 | |
1857 | /* Make sure this is a config format we understand. */ |
1858 | if (config_version != 0x01) |
1859 | return -ENOTSUPP; |
1860 | |
1861 | priv->gc.ngpio = 4; |
1862 | |
1863 | /* |
1864 | * Get default pin states after reset. Needed so we can determine |
1865 | * the direction of an open-drain pin. |
1866 | */ |
1867 | gpio_latch = (gpio_rst_latch >> 3) & 0x0f; |
1868 | |
1869 | /* 0 indicates open-drain mode, 1 is push-pull */ |
1870 | priv->gpio_pushpull = (gpio_pushpull >> 3) & 0x0f; |
1871 | |
1872 | /* 0 indicates GPIO mode, 1 is alternate function */ |
1873 | if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN20) { |
1874 | /* QFN20 is special... */ |
1875 | if (gpio_ctrl & CP2102N_QFN20_GPIO0_CLK_MODE) /* GPIO 0 */ |
1876 | priv->gpio_altfunc |= BIT(0); |
1877 | if (gpio_ctrl & CP2102N_QFN20_GPIO1_RS485_MODE) /* GPIO 1 */ |
1878 | priv->gpio_altfunc |= BIT(1); |
1879 | if (gpio_ctrl & CP2102N_QFN20_GPIO2_TXLED_MODE) /* GPIO 2 */ |
1880 | priv->gpio_altfunc |= BIT(2); |
1881 | if (gpio_ctrl & CP2102N_QFN20_GPIO3_RXLED_MODE) /* GPIO 3 */ |
1882 | priv->gpio_altfunc |= BIT(3); |
1883 | } else { |
1884 | priv->gpio_altfunc = (gpio_ctrl >> 2) & 0x0f; |
1885 | } |
1886 | |
1887 | if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN28) { |
1888 | /* |
1889 | * For the QFN28 package, GPIO4-6 are controlled by |
1890 | * the low three bits of the mode/latch fields. |
1891 | * Contrary to the document linked above, the bits for |
1892 | * the SUSPEND pins are elsewhere. No alternate |
1893 | * function is available for these pins. |
1894 | */ |
1895 | priv->gc.ngpio = 7; |
1896 | gpio_latch |= (gpio_rst_latch & 7) << 4; |
1897 | priv->gpio_pushpull |= (gpio_pushpull & 7) << 4; |
1898 | } |
1899 | |
1900 | /* |
1901 | * The CP2102N does not strictly has input and output pin modes, |
1902 | * it only knows open-drain and push-pull modes which is set at |
1903 | * factory. An open-drain pin can function both as an |
1904 | * input or an output. We emulate input mode for open-drain pins |
1905 | * by making sure they are not driven low, and we do not allow |
1906 | * push-pull pins to be set as an input. |
1907 | */ |
1908 | for (i = 0; i < priv->gc.ngpio; ++i) { |
1909 | /* |
1910 | * Set direction to "input" iff pin is open-drain and reset |
1911 | * value is 1. |
1912 | */ |
1913 | if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i))) |
1914 | priv->gpio_input |= BIT(i); |
1915 | } |
1916 | |
1917 | return 0; |
1918 | } |
1919 | |
1920 | static int cp210x_gpio_init(struct usb_serial *serial) |
1921 | { |
1922 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1923 | int result; |
1924 | |
1925 | switch (priv->partnum) { |
1926 | case CP210X_PARTNUM_CP2104: |
1927 | result = cp2104_gpioconf_init(serial); |
1928 | break; |
1929 | case CP210X_PARTNUM_CP2105: |
1930 | result = cp2105_gpioconf_init(serial); |
1931 | break; |
1932 | case CP210X_PARTNUM_CP2108: |
1933 | /* |
1934 | * The GPIOs are not tied to any specific port so only register |
1935 | * once for interface 0. |
1936 | */ |
1937 | if (cp210x_interface_num(serial) != 0) |
1938 | return 0; |
1939 | result = cp2108_gpio_init(serial); |
1940 | break; |
1941 | case CP210X_PARTNUM_CP2102N_QFN28: |
1942 | case CP210X_PARTNUM_CP2102N_QFN24: |
1943 | case CP210X_PARTNUM_CP2102N_QFN20: |
1944 | result = cp2102n_gpioconf_init(serial); |
1945 | break; |
1946 | default: |
1947 | return 0; |
1948 | } |
1949 | |
1950 | if (result < 0) |
1951 | return result; |
1952 | |
1953 | priv->gc.label = "cp210x" ; |
1954 | priv->gc.get_direction = cp210x_gpio_direction_get; |
1955 | priv->gc.direction_input = cp210x_gpio_direction_input; |
1956 | priv->gc.direction_output = cp210x_gpio_direction_output; |
1957 | priv->gc.get = cp210x_gpio_get; |
1958 | priv->gc.set = cp210x_gpio_set; |
1959 | priv->gc.set_config = cp210x_gpio_set_config; |
1960 | priv->gc.init_valid_mask = cp210x_gpio_init_valid_mask; |
1961 | priv->gc.owner = THIS_MODULE; |
1962 | priv->gc.parent = &serial->interface->dev; |
1963 | priv->gc.base = -1; |
1964 | priv->gc.can_sleep = true; |
1965 | |
1966 | result = gpiochip_add_data(&priv->gc, serial); |
1967 | if (!result) |
1968 | priv->gpio_registered = true; |
1969 | |
1970 | return result; |
1971 | } |
1972 | |
1973 | static void cp210x_gpio_remove(struct usb_serial *serial) |
1974 | { |
1975 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
1976 | |
1977 | if (priv->gpio_registered) { |
1978 | gpiochip_remove(gc: &priv->gc); |
1979 | priv->gpio_registered = false; |
1980 | } |
1981 | } |
1982 | |
1983 | #else |
1984 | |
1985 | static int cp210x_gpio_init(struct usb_serial *serial) |
1986 | { |
1987 | return 0; |
1988 | } |
1989 | |
1990 | static void cp210x_gpio_remove(struct usb_serial *serial) |
1991 | { |
1992 | /* Nothing to do */ |
1993 | } |
1994 | |
1995 | #endif |
1996 | |
1997 | static int cp210x_port_probe(struct usb_serial_port *port) |
1998 | { |
1999 | struct usb_serial *serial = port->serial; |
2000 | struct cp210x_port_private *port_priv; |
2001 | |
2002 | port_priv = kzalloc(size: sizeof(*port_priv), GFP_KERNEL); |
2003 | if (!port_priv) |
2004 | return -ENOMEM; |
2005 | |
2006 | port_priv->bInterfaceNumber = cp210x_interface_num(serial); |
2007 | mutex_init(&port_priv->mutex); |
2008 | |
2009 | usb_set_serial_port_data(port, data: port_priv); |
2010 | |
2011 | return 0; |
2012 | } |
2013 | |
2014 | static void cp210x_port_remove(struct usb_serial_port *port) |
2015 | { |
2016 | struct cp210x_port_private *port_priv; |
2017 | |
2018 | port_priv = usb_get_serial_port_data(port); |
2019 | kfree(objp: port_priv); |
2020 | } |
2021 | |
2022 | static void cp210x_init_max_speed(struct usb_serial *serial) |
2023 | { |
2024 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
2025 | bool use_actual_rate = false; |
2026 | speed_t min = 300; |
2027 | speed_t max; |
2028 | |
2029 | switch (priv->partnum) { |
2030 | case CP210X_PARTNUM_CP2101: |
2031 | max = 921600; |
2032 | break; |
2033 | case CP210X_PARTNUM_CP2102: |
2034 | case CP210X_PARTNUM_CP2103: |
2035 | max = 1000000; |
2036 | break; |
2037 | case CP210X_PARTNUM_CP2104: |
2038 | use_actual_rate = true; |
2039 | max = 2000000; |
2040 | break; |
2041 | case CP210X_PARTNUM_CP2108: |
2042 | max = 2000000; |
2043 | break; |
2044 | case CP210X_PARTNUM_CP2105: |
2045 | if (cp210x_interface_num(serial) == 0) { |
2046 | use_actual_rate = true; |
2047 | max = 2000000; /* ECI */ |
2048 | } else { |
2049 | min = 2400; |
2050 | max = 921600; /* SCI */ |
2051 | } |
2052 | break; |
2053 | case CP210X_PARTNUM_CP2102N_QFN28: |
2054 | case CP210X_PARTNUM_CP2102N_QFN24: |
2055 | case CP210X_PARTNUM_CP2102N_QFN20: |
2056 | use_actual_rate = true; |
2057 | max = 3000000; |
2058 | break; |
2059 | default: |
2060 | max = 2000000; |
2061 | break; |
2062 | } |
2063 | |
2064 | priv->min_speed = min; |
2065 | priv->max_speed = max; |
2066 | priv->use_actual_rate = use_actual_rate; |
2067 | } |
2068 | |
2069 | static void cp2102_determine_quirks(struct usb_serial *serial) |
2070 | { |
2071 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
2072 | u8 *buf; |
2073 | int ret; |
2074 | |
2075 | buf = kmalloc(size: 2, GFP_KERNEL); |
2076 | if (!buf) |
2077 | return; |
2078 | /* |
2079 | * Some (possibly counterfeit) CP2102 do not support event-insertion |
2080 | * mode and respond differently to malformed vendor requests. |
2081 | * Specifically, they return one instead of two bytes when sent a |
2082 | * two-byte part-number request. |
2083 | */ |
2084 | ret = usb_control_msg(dev: serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
2085 | CP210X_VENDOR_SPECIFIC, REQTYPE_DEVICE_TO_HOST, |
2086 | CP210X_GET_PARTNUM, index: 0, data: buf, size: 2, USB_CTRL_GET_TIMEOUT); |
2087 | if (ret == 1) { |
2088 | dev_dbg(&serial->interface->dev, |
2089 | "device does not support event-insertion mode\n" ); |
2090 | priv->no_event_mode = true; |
2091 | } |
2092 | |
2093 | kfree(objp: buf); |
2094 | } |
2095 | |
2096 | static int cp210x_get_fw_version(struct usb_serial *serial, u16 value) |
2097 | { |
2098 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
2099 | u8 ver[3]; |
2100 | int ret; |
2101 | |
2102 | ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, val: value, |
2103 | buf: ver, bufsize: sizeof(ver)); |
2104 | if (ret) |
2105 | return ret; |
2106 | |
2107 | dev_dbg(&serial->interface->dev, "%s - %d.%d.%d\n" , __func__, |
2108 | ver[0], ver[1], ver[2]); |
2109 | |
2110 | priv->fw_version = ver[0] << 16 | ver[1] << 8 | ver[2]; |
2111 | |
2112 | return 0; |
2113 | } |
2114 | |
2115 | static void cp210x_determine_type(struct usb_serial *serial) |
2116 | { |
2117 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
2118 | int ret; |
2119 | |
2120 | ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, |
2121 | CP210X_GET_PARTNUM, buf: &priv->partnum, |
2122 | bufsize: sizeof(priv->partnum)); |
2123 | if (ret < 0) { |
2124 | dev_warn(&serial->interface->dev, |
2125 | "querying part number failed\n" ); |
2126 | priv->partnum = CP210X_PARTNUM_UNKNOWN; |
2127 | return; |
2128 | } |
2129 | |
2130 | dev_dbg(&serial->interface->dev, "partnum = 0x%02x\n" , priv->partnum); |
2131 | |
2132 | switch (priv->partnum) { |
2133 | case CP210X_PARTNUM_CP2102: |
2134 | cp2102_determine_quirks(serial); |
2135 | break; |
2136 | case CP210X_PARTNUM_CP2105: |
2137 | case CP210X_PARTNUM_CP2108: |
2138 | cp210x_get_fw_version(serial, CP210X_GET_FW_VER); |
2139 | break; |
2140 | case CP210X_PARTNUM_CP2102N_QFN28: |
2141 | case CP210X_PARTNUM_CP2102N_QFN24: |
2142 | case CP210X_PARTNUM_CP2102N_QFN20: |
2143 | ret = cp210x_get_fw_version(serial, CP210X_GET_FW_VER_2N); |
2144 | if (ret) |
2145 | break; |
2146 | if (priv->fw_version <= 0x10004) |
2147 | priv->no_flow_control = true; |
2148 | break; |
2149 | default: |
2150 | break; |
2151 | } |
2152 | } |
2153 | |
2154 | static int cp210x_attach(struct usb_serial *serial) |
2155 | { |
2156 | int result; |
2157 | struct cp210x_serial_private *priv; |
2158 | |
2159 | priv = kzalloc(size: sizeof(*priv), GFP_KERNEL); |
2160 | if (!priv) |
2161 | return -ENOMEM; |
2162 | |
2163 | usb_set_serial_data(serial, data: priv); |
2164 | |
2165 | cp210x_determine_type(serial); |
2166 | cp210x_init_max_speed(serial); |
2167 | |
2168 | result = cp210x_gpio_init(serial); |
2169 | if (result < 0) { |
2170 | dev_err(&serial->interface->dev, "GPIO initialisation failed: %d\n" , |
2171 | result); |
2172 | } |
2173 | |
2174 | return 0; |
2175 | } |
2176 | |
2177 | static void cp210x_disconnect(struct usb_serial *serial) |
2178 | { |
2179 | cp210x_gpio_remove(serial); |
2180 | } |
2181 | |
2182 | static void cp210x_release(struct usb_serial *serial) |
2183 | { |
2184 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); |
2185 | |
2186 | cp210x_gpio_remove(serial); |
2187 | |
2188 | kfree(objp: priv); |
2189 | } |
2190 | |
2191 | module_usb_serial_driver(serial_drivers, id_table); |
2192 | |
2193 | MODULE_DESCRIPTION(DRIVER_DESC); |
2194 | MODULE_LICENSE("GPL v2" ); |
2195 | |