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Commit | Line | Data |
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1da177e4 | 1 | /* |
4cc27bd6 | 2 | * Silicon Laboratories CP210x USB to RS232 serial adaptor driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version | |
8 | * 2 as published by the Free Software Foundation. | |
9 | * | |
39a66b8d CS |
10 | * Support to set flow control line levels using TIOCMGET and TIOCMSET |
11 | * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow | |
12 | * control thanks to Munir Nassar nassarmu@real-time.com | |
13 | * | |
1da177e4 LT |
14 | */ |
15 | ||
1da177e4 LT |
16 | #include <linux/kernel.h> |
17 | #include <linux/errno.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/tty.h> | |
20 | #include <linux/tty_flip.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/moduleparam.h> | |
23 | #include <linux/usb.h> | |
ff7eb602 | 24 | #include <linux/uaccess.h> |
a969888c | 25 | #include <linux/usb/serial.h> |
cf5276ce MW |
26 | #include <linux/gpio/driver.h> |
27 | #include <linux/bitops.h> | |
28 | #include <linux/mutex.h> | |
1da177e4 | 29 | |
4cc27bd6 | 30 | #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" |
1da177e4 LT |
31 | |
32 | /* | |
33 | * Function Prototypes | |
34 | */ | |
a509a7e4 | 35 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); |
4cc27bd6 | 36 | static void cp210x_close(struct usb_serial_port *); |
4f2ab888 | 37 | static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); |
4cc27bd6 | 38 | static void cp210x_get_termios_port(struct usb_serial_port *port, |
009615ab | 39 | tcflag_t *cflagp, unsigned int *baudp); |
e5990874 JH |
40 | static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, |
41 | struct ktermios *); | |
4cc27bd6 | 42 | static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, |
95da310e | 43 | struct ktermios*); |
6f923a01 | 44 | static bool cp210x_tx_empty(struct usb_serial_port *port); |
60b33c13 | 45 | static int cp210x_tiocmget(struct tty_struct *); |
20b9d177 AC |
46 | static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); |
47 | static int cp210x_tiocmset_port(struct usb_serial_port *port, | |
d2ad67b3 | 48 | unsigned int, unsigned int); |
4cc27bd6 | 49 | static void cp210x_break_ctl(struct tty_struct *, int); |
cf5276ce MW |
50 | static int cp210x_attach(struct usb_serial *); |
51 | static void cp210x_disconnect(struct usb_serial *); | |
52 | static void cp210x_release(struct usb_serial *); | |
e2ae67a3 KS |
53 | static int cp210x_port_probe(struct usb_serial_port *); |
54 | static int cp210x_port_remove(struct usb_serial_port *); | |
d94c7bd4 | 55 | static void cp210x_dtr_rts(struct usb_serial_port *p, int on); |
1da177e4 | 56 | |
7d40d7e8 | 57 | static const struct usb_device_id id_table[] = { |
2f1136d1 | 58 | { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ |
5091b587 | 59 | { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ |
59fba744 | 60 | { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
5b22a32e | 61 | { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ |
b7c7cbc8 | 62 | { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ |
90625070 | 63 | { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ |
1f4f714f | 64 | { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ |
b7c7cbc8 | 65 | { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ |
a6f03312 | 66 | { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ |
eefd9029 CS |
67 | { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ |
68 | { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ | |
198b9517 | 69 | { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ |
014840ec | 70 | { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ |
59fba744 | 71 | { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ |
8de7f4da | 72 | { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ |
198b9517 | 73 | { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ |
e988fc8a CS |
74 | { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ |
75 | { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ | |
b7c7cbc8 | 76 | { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ |
0601e116 AK |
77 | { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ |
78 | { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ | |
5de8b3ac | 79 | { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ |
59224f53 | 80 | { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ |
eefd9029 CS |
81 | { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ |
82 | { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ | |
92f5cae2 | 83 | { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ |
9a18e75f | 84 | { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ |
212a4b4e | 85 | { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ |
eefd9029 | 86 | { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ |
e988fc8a | 87 | { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ |
5bbfa6f4 | 88 | { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ |
e988fc8a | 89 | { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ |
92f5cae2 | 90 | { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ |
e988fc8a | 91 | { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ |
ba0f332c | 92 | { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ |
e988fc8a | 93 | { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ |
8bf16ba7 | 94 | { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ |
fc4bd64c JH |
95 | { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ |
96 | { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ | |
a57e82a1 | 97 | { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ |
0bf7a81c | 98 | { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ |
e988fc8a | 99 | { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ |
3fcc8f96 | 100 | { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ |
eefd9029 | 101 | { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ |
c6535668 | 102 | { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ |
96623697 | 103 | { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ |
08e87d0d | 104 | { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ |
59fba744 | 105 | { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ |
eefd9029 | 106 | { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ |
78001e3d | 107 | { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ |
f487c54d | 108 | { USB_DEVICE(0x10C4, 0x81D7) }, /* IAI Corp. RCB-CV-USB USB to RS485 Adaptor */ |
78001e3d | 109 | { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ |
8be27c2d | 110 | { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ |
bd07c551 | 111 | { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ |
b7c7cbc8 | 112 | { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ |
78001e3d | 113 | { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ |
877e262c | 114 | { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ |
25985edc | 115 | { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ |
72b30079 | 116 | { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ |
c851e83f | 117 | { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ |
613ac23a | 118 | { USB_DEVICE(0x10C4, 0x82F4) }, /* Starizona MicroTouch */ |
b7c7cbc8 | 119 | { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ |
ba0f332c | 120 | { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ |
8bf16ba7 | 121 | { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ |
881e3c98 | 122 | { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ |
faea63f7 | 123 | { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ |
8bf16ba7 | 124 | { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ |
faea63f7 | 125 | { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ |
d23bac9f | 126 | { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ |
decc5360 | 127 | { USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */ |
541e05ec | 128 | { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ |
613ac23a | 129 | { USB_DEVICE(0x10C4, 0x84B6) }, /* Starizona Hyperion */ |
4eff0b40 CS |
130 | { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ |
131 | { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ | |
356fe44f | 132 | { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ |
4eff0b40 CS |
133 | { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ |
134 | { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ | |
1ae78a48 DP |
135 | { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ |
136 | { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ | |
76811569 SR |
137 | { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ |
138 | { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ | |
bfc2d7df | 139 | { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ |
2ab13292 | 140 | { USB_DEVICE(0x10C4, 0x8962) }, /* Brim Brothers charging dock */ |
1ae78a48 | 141 | { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ |
c735ed74 | 142 | { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ |
df72d588 | 143 | { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ |
e988fc8a | 144 | { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ |
61926b97 | 145 | { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ |
a5360a53 | 146 | { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ |
eefd9029 | 147 | { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ |
5de8b3ac CS |
148 | { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ |
149 | { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ | |
150 | { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ | |
151 | { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ | |
ebaf494e | 152 | { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ |
b7c7cbc8 | 153 | { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ |
1d377f4d MM |
154 | { USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */ |
155 | { USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */ | |
e05998d5 | 156 | { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ |
b7c7cbc8 | 157 | { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ |
3fcc8f96 CS |
158 | { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ |
159 | { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ | |
5de8b3ac | 160 | { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ |
3fcc8f96 CS |
161 | { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ |
162 | { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ | |
163 | { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ | |
164 | { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ | |
675af708 MG |
165 | { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ |
166 | { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ | |
b0ce84d5 | 167 | { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ |
356c5a48 AIB |
168 | { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ |
169 | { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ | |
170 | { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ | |
171 | { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ | |
c6c1e449 BT |
172 | { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ |
173 | { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ | |
541e05ec CS |
174 | { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ |
175 | { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ | |
176 | { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ | |
f7d7f59a | 177 | { USB_DEVICE(0x18EF, 0xE025) }, /* ELV Marble Sound Board 1 */ |
6627ae19 KL |
178 | { USB_DEVICE(0x1901, 0x0190) }, /* GE B850 CP2105 Recorder interface */ |
179 | { USB_DEVICE(0x1901, 0x0193) }, /* GE B650 CP2104 PMC interface */ | |
cddc9434 | 180 | { USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */ |
3c4c615d | 181 | { USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */ |
b579fa52 | 182 | { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ |
b9326057 | 183 | { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ |
35cc83ea | 184 | { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ |
93ad03d6 | 185 | { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ |
dee80ad1 | 186 | { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ |
3fcc8f96 CS |
187 | { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ |
188 | { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ | |
be3101c2 MK |
189 | { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ |
190 | { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ | |
191 | { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ | |
192 | { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ | |
193 | { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ | |
194 | { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ | |
195 | { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ | |
196 | { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ | |
197 | { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ | |
198 | { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ | |
199 | { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ | |
200 | { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ | |
201 | { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ | |
202 | { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ | |
203 | { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ | |
204 | { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ | |
205 | { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ | |
206 | { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ | |
207 | { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ | |
f98a7aa8 | 208 | { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ |
791b7d7c | 209 | { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ |
3fcc8f96 CS |
210 | { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ |
211 | { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ | |
541e05ec | 212 | { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ |
39a66b8d | 213 | { } /* Terminating Entry */ |
1da177e4 LT |
214 | }; |
215 | ||
ff7eb602 | 216 | MODULE_DEVICE_TABLE(usb, id_table); |
1da177e4 | 217 | |
cf5276ce MW |
218 | struct cp210x_serial_private { |
219 | #ifdef CONFIG_GPIOLIB | |
220 | struct gpio_chip gc; | |
221 | u8 config; | |
222 | u8 gpio_mode; | |
6b7271d2 | 223 | bool gpio_registered; |
cf5276ce MW |
224 | #endif |
225 | u8 partnum; | |
226 | }; | |
227 | ||
e2ae67a3 | 228 | struct cp210x_port_private { |
a5360a53 | 229 | __u8 bInterfaceNumber; |
d0bf1ff0 | 230 | bool has_swapped_line_ctl; |
a5360a53 PF |
231 | }; |
232 | ||
4cc27bd6 | 233 | static struct usb_serial_driver cp210x_device = { |
18fcac35 GKH |
234 | .driver = { |
235 | .owner = THIS_MODULE, | |
4f2ab888 | 236 | .name = "cp210x", |
18fcac35 | 237 | }, |
1da177e4 | 238 | .id_table = id_table, |
1da177e4 | 239 | .num_ports = 1, |
aea006b9 | 240 | .bulk_in_size = 256, |
d4e598f6 | 241 | .bulk_out_size = 256, |
4cc27bd6 CS |
242 | .open = cp210x_open, |
243 | .close = cp210x_close, | |
244 | .break_ctl = cp210x_break_ctl, | |
245 | .set_termios = cp210x_set_termios, | |
6f923a01 | 246 | .tx_empty = cp210x_tx_empty, |
4f2ab888 | 247 | .tiocmget = cp210x_tiocmget, |
4cc27bd6 | 248 | .tiocmset = cp210x_tiocmset, |
cf5276ce MW |
249 | .attach = cp210x_attach, |
250 | .disconnect = cp210x_disconnect, | |
251 | .release = cp210x_release, | |
e2ae67a3 KS |
252 | .port_probe = cp210x_port_probe, |
253 | .port_remove = cp210x_port_remove, | |
d14fc1a7 | 254 | .dtr_rts = cp210x_dtr_rts |
1da177e4 LT |
255 | }; |
256 | ||
08a4f6bc AS |
257 | static struct usb_serial_driver * const serial_drivers[] = { |
258 | &cp210x_device, NULL | |
259 | }; | |
260 | ||
39a66b8d | 261 | /* Config request types */ |
32445605 PF |
262 | #define REQTYPE_HOST_TO_INTERFACE 0x41 |
263 | #define REQTYPE_INTERFACE_TO_HOST 0xc1 | |
264 | #define REQTYPE_HOST_TO_DEVICE 0x40 | |
265 | #define REQTYPE_DEVICE_TO_HOST 0xc0 | |
1da177e4 | 266 | |
93ef1f1f CS |
267 | /* Config request codes */ |
268 | #define CP210X_IFC_ENABLE 0x00 | |
269 | #define CP210X_SET_BAUDDIV 0x01 | |
270 | #define CP210X_GET_BAUDDIV 0x02 | |
271 | #define CP210X_SET_LINE_CTL 0x03 | |
272 | #define CP210X_GET_LINE_CTL 0x04 | |
273 | #define CP210X_SET_BREAK 0x05 | |
274 | #define CP210X_IMM_CHAR 0x06 | |
275 | #define CP210X_SET_MHS 0x07 | |
276 | #define CP210X_GET_MDMSTS 0x08 | |
277 | #define CP210X_SET_XON 0x09 | |
278 | #define CP210X_SET_XOFF 0x0A | |
279 | #define CP210X_SET_EVENTMASK 0x0B | |
280 | #define CP210X_GET_EVENTMASK 0x0C | |
281 | #define CP210X_SET_CHAR 0x0D | |
282 | #define CP210X_GET_CHARS 0x0E | |
283 | #define CP210X_GET_PROPS 0x0F | |
284 | #define CP210X_GET_COMM_STATUS 0x10 | |
285 | #define CP210X_RESET 0x11 | |
286 | #define CP210X_PURGE 0x12 | |
287 | #define CP210X_SET_FLOW 0x13 | |
288 | #define CP210X_GET_FLOW 0x14 | |
289 | #define CP210X_EMBED_EVENTS 0x15 | |
290 | #define CP210X_GET_EVENTSTATE 0x16 | |
291 | #define CP210X_SET_CHARS 0x19 | |
7f482fc8 PF |
292 | #define CP210X_GET_BAUDRATE 0x1D |
293 | #define CP210X_SET_BAUDRATE 0x1E | |
cf5276ce | 294 | #define CP210X_VENDOR_SPECIFIC 0xFF |
93ef1f1f CS |
295 | |
296 | /* CP210X_IFC_ENABLE */ | |
1da177e4 LT |
297 | #define UART_ENABLE 0x0001 |
298 | #define UART_DISABLE 0x0000 | |
299 | ||
93ef1f1f | 300 | /* CP210X_(SET|GET)_BAUDDIV */ |
1da177e4 LT |
301 | #define BAUD_RATE_GEN_FREQ 0x384000 |
302 | ||
93ef1f1f | 303 | /* CP210X_(SET|GET)_LINE_CTL */ |
1da177e4 | 304 | #define BITS_DATA_MASK 0X0f00 |
39a66b8d | 305 | #define BITS_DATA_5 0X0500 |
1da177e4 LT |
306 | #define BITS_DATA_6 0X0600 |
307 | #define BITS_DATA_7 0X0700 | |
308 | #define BITS_DATA_8 0X0800 | |
309 | #define BITS_DATA_9 0X0900 | |
310 | ||
311 | #define BITS_PARITY_MASK 0x00f0 | |
312 | #define BITS_PARITY_NONE 0x0000 | |
313 | #define BITS_PARITY_ODD 0x0010 | |
314 | #define BITS_PARITY_EVEN 0x0020 | |
315 | #define BITS_PARITY_MARK 0x0030 | |
316 | #define BITS_PARITY_SPACE 0x0040 | |
317 | ||
318 | #define BITS_STOP_MASK 0x000f | |
319 | #define BITS_STOP_1 0x0000 | |
320 | #define BITS_STOP_1_5 0x0001 | |
321 | #define BITS_STOP_2 0x0002 | |
39a66b8d | 322 | |
93ef1f1f | 323 | /* CP210X_SET_BREAK */ |
72916791 CS |
324 | #define BREAK_ON 0x0001 |
325 | #define BREAK_OFF 0x0000 | |
1da177e4 | 326 | |
93ef1f1f | 327 | /* CP210X_(SET_MHS|GET_MDMSTS) */ |
39a66b8d CS |
328 | #define CONTROL_DTR 0x0001 |
329 | #define CONTROL_RTS 0x0002 | |
330 | #define CONTROL_CTS 0x0010 | |
331 | #define CONTROL_DSR 0x0020 | |
332 | #define CONTROL_RING 0x0040 | |
333 | #define CONTROL_DCD 0x0080 | |
334 | #define CONTROL_WRITE_DTR 0x0100 | |
335 | #define CONTROL_WRITE_RTS 0x0200 | |
1da177e4 | 336 | |
cf5276ce MW |
337 | /* CP210X_VENDOR_SPECIFIC values */ |
338 | #define CP210X_READ_LATCH 0x00C2 | |
339 | #define CP210X_GET_PARTNUM 0x370B | |
340 | #define CP210X_GET_PORTCONFIG 0x370C | |
341 | #define CP210X_GET_DEVICEMODE 0x3711 | |
342 | #define CP210X_WRITE_LATCH 0x37E1 | |
343 | ||
344 | /* Part number definitions */ | |
345 | #define CP210X_PARTNUM_CP2101 0x01 | |
346 | #define CP210X_PARTNUM_CP2102 0x02 | |
347 | #define CP210X_PARTNUM_CP2103 0x03 | |
348 | #define CP210X_PARTNUM_CP2104 0x04 | |
349 | #define CP210X_PARTNUM_CP2105 0x05 | |
350 | #define CP210X_PARTNUM_CP2108 0x08 | |
351 | ||
6f923a01 KS |
352 | /* CP210X_GET_COMM_STATUS returns these 0x13 bytes */ |
353 | struct cp210x_comm_status { | |
354 | __le32 ulErrors; | |
355 | __le32 ulHoldReasons; | |
356 | __le32 ulAmountInInQueue; | |
357 | __le32 ulAmountInOutQueue; | |
358 | u8 bEofReceived; | |
359 | u8 bWaitForImmediate; | |
360 | u8 bReserved; | |
361 | } __packed; | |
362 | ||
ebfb319b KS |
363 | /* |
364 | * CP210X_PURGE - 16 bits passed in wValue of USB request. | |
365 | * SiLabs app note AN571 gives a strange description of the 4 bits: | |
366 | * bit 0 or bit 2 clears the transmit queue and 1 or 3 receive. | |
367 | * writing 1 to all, however, purges cp2108 well enough to avoid the hang. | |
368 | */ | |
369 | #define PURGE_ALL 0x000f | |
370 | ||
9034389c KS |
371 | /* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */ |
372 | struct cp210x_flow_ctl { | |
373 | __le32 ulControlHandshake; | |
374 | __le32 ulFlowReplace; | |
375 | __le32 ulXonLimit; | |
376 | __le32 ulXoffLimit; | |
377 | } __packed; | |
378 | ||
379 | /* cp210x_flow_ctl::ulControlHandshake */ | |
380 | #define CP210X_SERIAL_DTR_MASK GENMASK(1, 0) | |
381 | #define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode) | |
382 | #define CP210X_SERIAL_CTS_HANDSHAKE BIT(3) | |
383 | #define CP210X_SERIAL_DSR_HANDSHAKE BIT(4) | |
384 | #define CP210X_SERIAL_DCD_HANDSHAKE BIT(5) | |
385 | #define CP210X_SERIAL_DSR_SENSITIVITY BIT(6) | |
386 | ||
387 | /* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */ | |
388 | #define CP210X_SERIAL_DTR_INACTIVE 0 | |
389 | #define CP210X_SERIAL_DTR_ACTIVE 1 | |
390 | #define CP210X_SERIAL_DTR_FLOW_CTL 2 | |
391 | ||
392 | /* cp210x_flow_ctl::ulFlowReplace */ | |
393 | #define CP210X_SERIAL_AUTO_TRANSMIT BIT(0) | |
394 | #define CP210X_SERIAL_AUTO_RECEIVE BIT(1) | |
395 | #define CP210X_SERIAL_ERROR_CHAR BIT(2) | |
396 | #define CP210X_SERIAL_NULL_STRIPPING BIT(3) | |
397 | #define CP210X_SERIAL_BREAK_CHAR BIT(4) | |
398 | #define CP210X_SERIAL_RTS_MASK GENMASK(7, 6) | |
399 | #define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6) | |
400 | #define CP210X_SERIAL_XOFF_CONTINUE BIT(31) | |
401 | ||
402 | /* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */ | |
403 | #define CP210X_SERIAL_RTS_INACTIVE 0 | |
404 | #define CP210X_SERIAL_RTS_ACTIVE 1 | |
405 | #define CP210X_SERIAL_RTS_FLOW_CTL 2 | |
406 | ||
cf5276ce MW |
407 | /* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */ |
408 | struct cp210x_pin_mode { | |
409 | u8 eci; | |
410 | u8 sci; | |
411 | } __packed; | |
412 | ||
413 | #define CP210X_PIN_MODE_MODEM 0 | |
414 | #define CP210X_PIN_MODE_GPIO BIT(0) | |
415 | ||
416 | /* | |
417 | * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes. | |
418 | * Structure needs padding due to unused/unspecified bytes. | |
419 | */ | |
420 | struct cp210x_config { | |
421 | __le16 gpio_mode; | |
422 | u8 __pad0[2]; | |
423 | __le16 reset_state; | |
424 | u8 __pad1[4]; | |
425 | __le16 suspend_state; | |
426 | u8 sci_cfg; | |
427 | u8 eci_cfg; | |
428 | u8 device_cfg; | |
429 | } __packed; | |
430 | ||
431 | /* GPIO modes */ | |
432 | #define CP210X_SCI_GPIO_MODE_OFFSET 9 | |
433 | #define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9) | |
434 | ||
435 | #define CP210X_ECI_GPIO_MODE_OFFSET 2 | |
436 | #define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2) | |
437 | ||
438 | /* CP2105 port configuration values */ | |
439 | #define CP2105_GPIO0_TXLED_MODE BIT(0) | |
440 | #define CP2105_GPIO1_RXLED_MODE BIT(1) | |
441 | #define CP2105_GPIO1_RS485_MODE BIT(2) | |
442 | ||
443 | /* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */ | |
444 | struct cp210x_gpio_write { | |
445 | u8 mask; | |
446 | u8 state; | |
447 | } __packed; | |
448 | ||
449 | /* | |
450 | * Helper to get interface number when we only have struct usb_serial. | |
451 | */ | |
452 | static u8 cp210x_interface_num(struct usb_serial *serial) | |
453 | { | |
454 | struct usb_host_interface *cur_altsetting; | |
455 | ||
456 | cur_altsetting = serial->interface->cur_altsetting; | |
457 | ||
458 | return cur_altsetting->desc.bInterfaceNumber; | |
459 | } | |
460 | ||
39a66b8d | 461 | /* |
19165b2b KS |
462 | * Reads a variable-sized block of CP210X_ registers, identified by req. |
463 | * Returns data into buf in native USB byte order. | |
39a66b8d | 464 | */ |
19165b2b KS |
465 | static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req, |
466 | void *buf, int bufsize) | |
1da177e4 LT |
467 | { |
468 | struct usb_serial *serial = port->serial; | |
e2ae67a3 | 469 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
19165b2b KS |
470 | void *dmabuf; |
471 | int result; | |
39a66b8d | 472 | |
19165b2b KS |
473 | dmabuf = kmalloc(bufsize, GFP_KERNEL); |
474 | if (!dmabuf) { | |
475 | /* | |
476 | * FIXME Some callers don't bother to check for error, | |
477 | * at least give them consistent junk until they are fixed | |
478 | */ | |
479 | memset(buf, 0, bufsize); | |
39a66b8d | 480 | return -ENOMEM; |
19165b2b | 481 | } |
1da177e4 | 482 | |
ff7eb602 | 483 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
19165b2b KS |
484 | req, REQTYPE_INTERFACE_TO_HOST, 0, |
485 | port_priv->bInterfaceNumber, dmabuf, bufsize, | |
486 | USB_CTRL_SET_TIMEOUT); | |
487 | if (result == bufsize) { | |
488 | memcpy(buf, dmabuf, bufsize); | |
489 | result = 0; | |
490 | } else { | |
491 | dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n", | |
492 | req, bufsize, result); | |
493 | if (result >= 0) | |
0407f1ce | 494 | result = -EIO; |
1da177e4 | 495 | |
19165b2b KS |
496 | /* |
497 | * FIXME Some callers don't bother to check for error, | |
498 | * at least give them consistent junk until they are fixed | |
499 | */ | |
500 | memset(buf, 0, bufsize); | |
501 | } | |
1da177e4 | 502 | |
19165b2b | 503 | kfree(dmabuf); |
1da177e4 | 504 | |
19165b2b KS |
505 | return result; |
506 | } | |
2479e2a9 | 507 | |
fe1b07e9 KS |
508 | /* |
509 | * Reads any 32-bit CP210X_ register identified by req. | |
510 | */ | |
511 | static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val) | |
512 | { | |
513 | __le32 le32_val; | |
514 | int err; | |
515 | ||
516 | err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val)); | |
517 | if (err) { | |
518 | /* | |
519 | * FIXME Some callers don't bother to check for error, | |
520 | * at least give them consistent junk until they are fixed | |
521 | */ | |
522 | *val = 0; | |
523 | return err; | |
39a66b8d | 524 | } |
1da177e4 | 525 | |
fe1b07e9 KS |
526 | *val = le32_to_cpu(le32_val); |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
19165b2b KS |
531 | /* |
532 | * Reads any 16-bit CP210X_ register identified by req. | |
533 | */ | |
534 | static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val) | |
535 | { | |
536 | __le16 le16_val; | |
537 | int err; | |
538 | ||
539 | err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val)); | |
540 | if (err) | |
541 | return err; | |
542 | ||
543 | *val = le16_to_cpu(le16_val); | |
fe1b07e9 | 544 | |
39a66b8d | 545 | return 0; |
1da177e4 LT |
546 | } |
547 | ||
39a66b8d | 548 | /* |
fe1b07e9 KS |
549 | * Reads any 8-bit CP210X_ register identified by req. |
550 | */ | |
551 | static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val) | |
552 | { | |
553 | return cp210x_read_reg_block(port, req, val, sizeof(*val)); | |
554 | } | |
555 | ||
cf5276ce MW |
556 | /* |
557 | * Reads a variable-sized vendor block of CP210X_ registers, identified by val. | |
558 | * Returns data into buf in native USB byte order. | |
559 | */ | |
560 | static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val, | |
561 | void *buf, int bufsize) | |
562 | { | |
563 | void *dmabuf; | |
564 | int result; | |
565 | ||
566 | dmabuf = kmalloc(bufsize, GFP_KERNEL); | |
567 | if (!dmabuf) | |
568 | return -ENOMEM; | |
569 | ||
570 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
571 | CP210X_VENDOR_SPECIFIC, type, val, | |
572 | cp210x_interface_num(serial), dmabuf, bufsize, | |
573 | USB_CTRL_GET_TIMEOUT); | |
574 | if (result == bufsize) { | |
575 | memcpy(buf, dmabuf, bufsize); | |
576 | result = 0; | |
577 | } else { | |
578 | dev_err(&serial->interface->dev, | |
579 | "failed to get vendor val 0x%04x size %d: %d\n", val, | |
580 | bufsize, result); | |
581 | if (result >= 0) | |
582 | result = -EIO; | |
583 | } | |
584 | ||
585 | kfree(dmabuf); | |
586 | ||
587 | return result; | |
588 | } | |
589 | ||
19165b2b KS |
590 | /* |
591 | * Writes any 16-bit CP210X_ register (req) whose value is passed | |
592 | * entirely in the wValue field of the USB request. | |
39a66b8d | 593 | */ |
19165b2b | 594 | static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val) |
1da177e4 LT |
595 | { |
596 | struct usb_serial *serial = port->serial; | |
e2ae67a3 | 597 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); |
19165b2b KS |
598 | int result; |
599 | ||
600 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
601 | req, REQTYPE_HOST_TO_INTERFACE, val, | |
602 | port_priv->bInterfaceNumber, NULL, 0, | |
603 | USB_CTRL_SET_TIMEOUT); | |
604 | if (result < 0) { | |
605 | dev_err(&port->dev, "failed set request 0x%x status: %d\n", | |
606 | req, result); | |
607 | } | |
608 | ||
609 | return result; | |
39a66b8d | 610 | } |
1da177e4 | 611 | |
fe1b07e9 KS |
612 | /* |
613 | * Writes a variable-sized block of CP210X_ registers, identified by req. | |
614 | * Data in buf must be in native USB byte order. | |
615 | */ | |
616 | static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req, | |
617 | void *buf, int bufsize) | |
618 | { | |
619 | struct usb_serial *serial = port->serial; | |
620 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); | |
621 | void *dmabuf; | |
622 | int result; | |
39a66b8d | 623 | |
d6c4dc3b | 624 | dmabuf = kmemdup(buf, bufsize, GFP_KERNEL); |
fe1b07e9 | 625 | if (!dmabuf) |
39a66b8d | 626 | return -ENOMEM; |
39a66b8d | 627 | |
fe1b07e9 KS |
628 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
629 | req, REQTYPE_HOST_TO_INTERFACE, 0, | |
630 | port_priv->bInterfaceNumber, dmabuf, bufsize, | |
631 | USB_CTRL_SET_TIMEOUT); | |
1da177e4 | 632 | |
fe1b07e9 | 633 | kfree(dmabuf); |
39a66b8d | 634 | |
fe1b07e9 KS |
635 | if (result == bufsize) { |
636 | result = 0; | |
637 | } else { | |
638 | dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n", | |
639 | req, bufsize, result); | |
640 | if (result >= 0) | |
0407f1ce | 641 | result = -EIO; |
39a66b8d | 642 | } |
1da177e4 | 643 | |
fe1b07e9 | 644 | return result; |
1da177e4 LT |
645 | } |
646 | ||
39a66b8d | 647 | /* |
fe1b07e9 | 648 | * Writes any 32-bit CP210X_ register identified by req. |
39a66b8d | 649 | */ |
fe1b07e9 | 650 | static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val) |
39a66b8d | 651 | { |
fe1b07e9 KS |
652 | __le32 le32_val; |
653 | ||
654 | le32_val = cpu_to_le32(val); | |
655 | ||
656 | return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val)); | |
39a66b8d CS |
657 | } |
658 | ||
cf5276ce MW |
659 | #ifdef CONFIG_GPIOLIB |
660 | /* | |
661 | * Writes a variable-sized vendor block of CP210X_ registers, identified by val. | |
662 | * Data in buf must be in native USB byte order. | |
663 | */ | |
664 | static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type, | |
665 | u16 val, void *buf, int bufsize) | |
666 | { | |
667 | void *dmabuf; | |
668 | int result; | |
669 | ||
670 | dmabuf = kmemdup(buf, bufsize, GFP_KERNEL); | |
671 | if (!dmabuf) | |
672 | return -ENOMEM; | |
673 | ||
674 | result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
675 | CP210X_VENDOR_SPECIFIC, type, val, | |
676 | cp210x_interface_num(serial), dmabuf, bufsize, | |
677 | USB_CTRL_SET_TIMEOUT); | |
678 | ||
679 | kfree(dmabuf); | |
680 | ||
681 | if (result == bufsize) { | |
682 | result = 0; | |
683 | } else { | |
684 | dev_err(&serial->interface->dev, | |
685 | "failed to set vendor val 0x%04x size %d: %d\n", val, | |
686 | bufsize, result); | |
687 | if (result >= 0) | |
688 | result = -EIO; | |
689 | } | |
690 | ||
691 | return result; | |
692 | } | |
693 | #endif | |
694 | ||
d0bf1ff0 KS |
695 | /* |
696 | * Detect CP2108 GET_LINE_CTL bug and activate workaround. | |
697 | * Write a known good value 0x800, read it back. | |
698 | * If it comes back swapped the bug is detected. | |
699 | * Preserve the original register value. | |
700 | */ | |
701 | static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port) | |
702 | { | |
703 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); | |
19165b2b KS |
704 | u16 line_ctl_save; |
705 | u16 line_ctl_test; | |
d0bf1ff0 KS |
706 | int err; |
707 | ||
19165b2b | 708 | err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save); |
d0bf1ff0 KS |
709 | if (err) |
710 | return err; | |
711 | ||
19165b2b | 712 | err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800); |
d0bf1ff0 KS |
713 | if (err) |
714 | return err; | |
715 | ||
19165b2b | 716 | err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test); |
d0bf1ff0 KS |
717 | if (err) |
718 | return err; | |
719 | ||
720 | if (line_ctl_test == 8) { | |
721 | port_priv->has_swapped_line_ctl = true; | |
19165b2b | 722 | line_ctl_save = swab16(line_ctl_save); |
d0bf1ff0 KS |
723 | } |
724 | ||
19165b2b | 725 | return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save); |
d0bf1ff0 KS |
726 | } |
727 | ||
728 | /* | |
19165b2b | 729 | * Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL) |
d0bf1ff0 KS |
730 | * to workaround cp2108 bug and get correct value. |
731 | */ | |
19165b2b | 732 | static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl) |
d0bf1ff0 KS |
733 | { |
734 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); | |
735 | int err; | |
736 | ||
19165b2b | 737 | err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl); |
d0bf1ff0 KS |
738 | if (err) |
739 | return err; | |
740 | ||
741 | /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */ | |
742 | if (port_priv->has_swapped_line_ctl) | |
19165b2b | 743 | *ctl = swab16(*ctl); |
d0bf1ff0 KS |
744 | |
745 | return 0; | |
746 | } | |
747 | ||
ef8b6bcb | 748 | /* |
4cc27bd6 | 749 | * cp210x_quantise_baudrate |
ef8b6bcb CS |
750 | * Quantises the baud rate as per AN205 Table 1 |
751 | */ | |
4f2ab888 JH |
752 | static unsigned int cp210x_quantise_baudrate(unsigned int baud) |
753 | { | |
be125d9c JH |
754 | if (baud <= 300) |
755 | baud = 300; | |
ef8b6bcb CS |
756 | else if (baud <= 600) baud = 600; |
757 | else if (baud <= 1200) baud = 1200; | |
758 | else if (baud <= 1800) baud = 1800; | |
759 | else if (baud <= 2400) baud = 2400; | |
760 | else if (baud <= 4000) baud = 4000; | |
761 | else if (baud <= 4803) baud = 4800; | |
762 | else if (baud <= 7207) baud = 7200; | |
763 | else if (baud <= 9612) baud = 9600; | |
764 | else if (baud <= 14428) baud = 14400; | |
765 | else if (baud <= 16062) baud = 16000; | |
766 | else if (baud <= 19250) baud = 19200; | |
767 | else if (baud <= 28912) baud = 28800; | |
768 | else if (baud <= 38601) baud = 38400; | |
769 | else if (baud <= 51558) baud = 51200; | |
770 | else if (baud <= 56280) baud = 56000; | |
771 | else if (baud <= 58053) baud = 57600; | |
772 | else if (baud <= 64111) baud = 64000; | |
773 | else if (baud <= 77608) baud = 76800; | |
774 | else if (baud <= 117028) baud = 115200; | |
775 | else if (baud <= 129347) baud = 128000; | |
776 | else if (baud <= 156868) baud = 153600; | |
777 | else if (baud <= 237832) baud = 230400; | |
778 | else if (baud <= 254234) baud = 250000; | |
779 | else if (baud <= 273066) baud = 256000; | |
780 | else if (baud <= 491520) baud = 460800; | |
781 | else if (baud <= 567138) baud = 500000; | |
782 | else if (baud <= 670254) baud = 576000; | |
d1620ca9 JH |
783 | else if (baud < 1000000) |
784 | baud = 921600; | |
785 | else if (baud > 2000000) | |
786 | baud = 2000000; | |
ef8b6bcb CS |
787 | return baud; |
788 | } | |
789 | ||
a509a7e4 | 790 | static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 791 | { |
1da177e4 LT |
792 | int result; |
793 | ||
19165b2b | 794 | result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE); |
2479e2a9 JH |
795 | if (result) { |
796 | dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); | |
797 | return result; | |
1da177e4 LT |
798 | } |
799 | ||
39a66b8d | 800 | /* Configure the termios structure */ |
4cc27bd6 | 801 | cp210x_get_termios(tty, port); |
55b2afbb | 802 | |
cdc32fd6 JH |
803 | /* The baud rate must be initialised on cp2104 */ |
804 | if (tty) | |
805 | cp210x_change_speed(tty, port, NULL); | |
806 | ||
55b2afbb | 807 | return usb_serial_generic_open(tty, port); |
1da177e4 LT |
808 | } |
809 | ||
4cc27bd6 | 810 | static void cp210x_close(struct usb_serial_port *port) |
1da177e4 | 811 | { |
f26788da | 812 | usb_serial_generic_close(port); |
ebfb319b KS |
813 | |
814 | /* Clear both queues; cp2108 needs this to avoid an occasional hang */ | |
19165b2b | 815 | cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL); |
ebfb319b | 816 | |
19165b2b | 817 | cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE); |
1da177e4 LT |
818 | } |
819 | ||
6f923a01 KS |
820 | /* |
821 | * Read how many bytes are waiting in the TX queue. | |
822 | */ | |
823 | static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port, | |
824 | u32 *count) | |
825 | { | |
826 | struct usb_serial *serial = port->serial; | |
827 | struct cp210x_port_private *port_priv = usb_get_serial_port_data(port); | |
828 | struct cp210x_comm_status *sts; | |
829 | int result; | |
830 | ||
831 | sts = kmalloc(sizeof(*sts), GFP_KERNEL); | |
832 | if (!sts) | |
833 | return -ENOMEM; | |
834 | ||
835 | result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), | |
836 | CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST, | |
837 | 0, port_priv->bInterfaceNumber, sts, sizeof(*sts), | |
838 | USB_CTRL_GET_TIMEOUT); | |
839 | if (result == sizeof(*sts)) { | |
840 | *count = le32_to_cpu(sts->ulAmountInOutQueue); | |
841 | result = 0; | |
842 | } else { | |
843 | dev_err(&port->dev, "failed to get comm status: %d\n", result); | |
844 | if (result >= 0) | |
0407f1ce | 845 | result = -EIO; |
6f923a01 KS |
846 | } |
847 | ||
848 | kfree(sts); | |
849 | ||
850 | return result; | |
851 | } | |
852 | ||
853 | static bool cp210x_tx_empty(struct usb_serial_port *port) | |
854 | { | |
855 | int err; | |
856 | u32 count; | |
857 | ||
858 | err = cp210x_get_tx_queue_byte_count(port, &count); | |
859 | if (err) | |
860 | return true; | |
861 | ||
862 | return !count; | |
863 | } | |
864 | ||
39a66b8d | 865 | /* |
4cc27bd6 | 866 | * cp210x_get_termios |
39a66b8d CS |
867 | * Reads the baud rate, data bits, parity, stop bits and flow control mode |
868 | * from the device, corrects any unsupported values, and configures the | |
869 | * termios structure to reflect the state of the device | |
870 | */ | |
4cc27bd6 | 871 | static void cp210x_get_termios(struct tty_struct *tty, |
d2ad67b3 V |
872 | struct usb_serial_port *port) |
873 | { | |
874 | unsigned int baud; | |
875 | ||
876 | if (tty) { | |
4cc27bd6 | 877 | cp210x_get_termios_port(tty->driver_data, |
adc8d746 | 878 | &tty->termios.c_cflag, &baud); |
d2ad67b3 | 879 | tty_encode_baud_rate(tty, baud, baud); |
4f2ab888 | 880 | } else { |
009615ab | 881 | tcflag_t cflag; |
d2ad67b3 | 882 | cflag = 0; |
4cc27bd6 | 883 | cp210x_get_termios_port(port, &cflag, &baud); |
d2ad67b3 V |
884 | } |
885 | } | |
886 | ||
887 | /* | |
4cc27bd6 CS |
888 | * cp210x_get_termios_port |
889 | * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. | |
d2ad67b3 | 890 | */ |
4cc27bd6 | 891 | static void cp210x_get_termios_port(struct usb_serial_port *port, |
009615ab | 892 | tcflag_t *cflagp, unsigned int *baudp) |
1da177e4 | 893 | { |
660f3b14 | 894 | struct device *dev = &port->dev; |
009615ab | 895 | tcflag_t cflag; |
9034389c | 896 | struct cp210x_flow_ctl flow_ctl; |
fe1b07e9 | 897 | u32 baud; |
19165b2b | 898 | u16 bits; |
9034389c | 899 | u32 ctl_hs; |
1da177e4 | 900 | |
fe1b07e9 | 901 | cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud); |
1da177e4 | 902 | |
660f3b14 | 903 | dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); |
d2ad67b3 | 904 | *baudp = baud; |
9ab0f202 | 905 | |
d2ad67b3 | 906 | cflag = *cflagp; |
1da177e4 | 907 | |
d0bf1ff0 | 908 | cp210x_get_line_ctl(port, &bits); |
1da177e4 | 909 | cflag &= ~CSIZE; |
ff7eb602 AC |
910 | switch (bits & BITS_DATA_MASK) { |
911 | case BITS_DATA_5: | |
660f3b14 | 912 | dev_dbg(dev, "%s - data bits = 5\n", __func__); |
ff7eb602 AC |
913 | cflag |= CS5; |
914 | break; | |
915 | case BITS_DATA_6: | |
660f3b14 | 916 | dev_dbg(dev, "%s - data bits = 6\n", __func__); |
ff7eb602 AC |
917 | cflag |= CS6; |
918 | break; | |
919 | case BITS_DATA_7: | |
660f3b14 | 920 | dev_dbg(dev, "%s - data bits = 7\n", __func__); |
ff7eb602 AC |
921 | cflag |= CS7; |
922 | break; | |
923 | case BITS_DATA_8: | |
660f3b14 | 924 | dev_dbg(dev, "%s - data bits = 8\n", __func__); |
ff7eb602 AC |
925 | cflag |= CS8; |
926 | break; | |
927 | case BITS_DATA_9: | |
660f3b14 | 928 | dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); |
ff7eb602 AC |
929 | cflag |= CS8; |
930 | bits &= ~BITS_DATA_MASK; | |
931 | bits |= BITS_DATA_8; | |
19165b2b | 932 | cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
ff7eb602 AC |
933 | break; |
934 | default: | |
660f3b14 | 935 | dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__); |
ff7eb602 AC |
936 | cflag |= CS8; |
937 | bits &= ~BITS_DATA_MASK; | |
938 | bits |= BITS_DATA_8; | |
19165b2b | 939 | cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
ff7eb602 | 940 | break; |
1da177e4 LT |
941 | } |
942 | ||
ff7eb602 AC |
943 | switch (bits & BITS_PARITY_MASK) { |
944 | case BITS_PARITY_NONE: | |
660f3b14 | 945 | dev_dbg(dev, "%s - parity = NONE\n", __func__); |
ff7eb602 AC |
946 | cflag &= ~PARENB; |
947 | break; | |
948 | case BITS_PARITY_ODD: | |
660f3b14 | 949 | dev_dbg(dev, "%s - parity = ODD\n", __func__); |
ff7eb602 AC |
950 | cflag |= (PARENB|PARODD); |
951 | break; | |
952 | case BITS_PARITY_EVEN: | |
660f3b14 | 953 | dev_dbg(dev, "%s - parity = EVEN\n", __func__); |
ff7eb602 AC |
954 | cflag &= ~PARODD; |
955 | cflag |= PARENB; | |
956 | break; | |
957 | case BITS_PARITY_MARK: | |
660f3b14 | 958 | dev_dbg(dev, "%s - parity = MARK\n", __func__); |
4b6181ca | 959 | cflag |= (PARENB|PARODD|CMSPAR); |
ff7eb602 AC |
960 | break; |
961 | case BITS_PARITY_SPACE: | |
660f3b14 | 962 | dev_dbg(dev, "%s - parity = SPACE\n", __func__); |
4b6181ca RK |
963 | cflag &= ~PARODD; |
964 | cflag |= (PARENB|CMSPAR); | |
ff7eb602 AC |
965 | break; |
966 | default: | |
660f3b14 | 967 | dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); |
ff7eb602 AC |
968 | cflag &= ~PARENB; |
969 | bits &= ~BITS_PARITY_MASK; | |
19165b2b | 970 | cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
ff7eb602 | 971 | break; |
1da177e4 LT |
972 | } |
973 | ||
974 | cflag &= ~CSTOPB; | |
ff7eb602 AC |
975 | switch (bits & BITS_STOP_MASK) { |
976 | case BITS_STOP_1: | |
660f3b14 | 977 | dev_dbg(dev, "%s - stop bits = 1\n", __func__); |
ff7eb602 AC |
978 | break; |
979 | case BITS_STOP_1_5: | |
660f3b14 | 980 | dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); |
ff7eb602 | 981 | bits &= ~BITS_STOP_MASK; |
19165b2b | 982 | cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
ff7eb602 AC |
983 | break; |
984 | case BITS_STOP_2: | |
660f3b14 | 985 | dev_dbg(dev, "%s - stop bits = 2\n", __func__); |
ff7eb602 AC |
986 | cflag |= CSTOPB; |
987 | break; | |
988 | default: | |
660f3b14 | 989 | dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); |
ff7eb602 | 990 | bits &= ~BITS_STOP_MASK; |
19165b2b | 991 | cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits); |
ff7eb602 | 992 | break; |
1da177e4 LT |
993 | } |
994 | ||
9034389c KS |
995 | cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl, |
996 | sizeof(flow_ctl)); | |
997 | ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); | |
998 | if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) { | |
660f3b14 | 999 | dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); |
39a66b8d CS |
1000 | cflag |= CRTSCTS; |
1001 | } else { | |
660f3b14 | 1002 | dev_dbg(dev, "%s - flow control = NONE\n", __func__); |
39a66b8d CS |
1003 | cflag &= ~CRTSCTS; |
1004 | } | |
1005 | ||
d2ad67b3 | 1006 | *cflagp = cflag; |
1da177e4 LT |
1007 | } |
1008 | ||
e5990874 JH |
1009 | /* |
1010 | * CP2101 supports the following baud rates: | |
1011 | * | |
1012 | * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, | |
1013 | * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 | |
1014 | * | |
1015 | * CP2102 and CP2103 support the following additional rates: | |
1016 | * | |
1017 | * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, | |
1018 | * 576000 | |
1019 | * | |
1020 | * The device will map a requested rate to a supported one, but the result | |
1021 | * of requests for rates greater than 1053257 is undefined (see AN205). | |
1022 | * | |
1023 | * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, | |
1024 | * respectively, with an error less than 1%. The actual rates are determined | |
1025 | * by | |
1026 | * | |
1027 | * div = round(freq / (2 x prescale x request)) | |
1028 | * actual = freq / (2 x prescale x div) | |
1029 | * | |
1030 | * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps | |
1031 | * or 1 otherwise. | |
1032 | * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 | |
1033 | * otherwise. | |
1034 | */ | |
1035 | static void cp210x_change_speed(struct tty_struct *tty, | |
1036 | struct usb_serial_port *port, struct ktermios *old_termios) | |
1037 | { | |
1038 | u32 baud; | |
1039 | ||
adc8d746 | 1040 | baud = tty->termios.c_ospeed; |
e5990874 | 1041 | |
d1620ca9 JH |
1042 | /* This maps the requested rate to a rate valid on cp2102 or cp2103, |
1043 | * or to an arbitrary rate in [1M,2M]. | |
e5990874 JH |
1044 | * |
1045 | * NOTE: B0 is not implemented. | |
1046 | */ | |
1047 | baud = cp210x_quantise_baudrate(baud); | |
1048 | ||
660f3b14 | 1049 | dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); |
fe1b07e9 | 1050 | if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) { |
e5990874 JH |
1051 | dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); |
1052 | if (old_termios) | |
1053 | baud = old_termios->c_ospeed; | |
1054 | else | |
1055 | baud = 9600; | |
1056 | } | |
1057 | ||
1058 | tty_encode_baud_rate(tty, baud, baud); | |
1059 | } | |
1060 | ||
4cc27bd6 | 1061 | static void cp210x_set_termios(struct tty_struct *tty, |
95da310e | 1062 | struct usb_serial_port *port, struct ktermios *old_termios) |
1da177e4 | 1063 | { |
660f3b14 | 1064 | struct device *dev = &port->dev; |
9ab0f202 | 1065 | unsigned int cflag, old_cflag; |
19165b2b | 1066 | u16 bits; |
1da177e4 | 1067 | |
adc8d746 | 1068 | cflag = tty->termios.c_cflag; |
01e96d28 | 1069 | old_cflag = old_termios->c_cflag; |
e5990874 | 1070 | |
adc8d746 | 1071 | if (tty->termios.c_ospeed != old_termios->c_ospeed) |
e5990874 | 1072 | cp210x_change_speed(tty, port, old_termios); |
1da177e4 | 1073 | |
39a66b8d | 1074 | /* If the number of data bits is to be updated */ |
1da177e4 | 1075 | if ((cflag & CSIZE) != (old_cflag & CSIZE)) { |
d0bf1ff0 | 1076 | cp210x_get_line_ctl(port, &bits); |
1da177e4 LT |
1077 | bits &= ~BITS_DATA_MASK; |
1078 | switch (cflag & CSIZE) { | |
ff7eb602 AC |
1079 | case CS5: |
1080 | bits |= BITS_DATA_5; | |
660f3b14 | 1081 | dev_dbg(dev, "%s - data bits = 5\n", __func__); |
ff7eb602 AC |
1082 | break; |
1083 | case CS6: | |
1084 | bits |= BITS_DATA_6; | |
660f3b14 | 1085 | dev_dbg(dev, "%s - data bits = 6\n", __func__); |
ff7eb602 AC |
1086 | break; |
1087 | case CS7: | |
1088 | bits |= BITS_DATA_7; | |
660f3b14 | 1089 | dev_dbg(dev, "%s - data bits = 7\n", __func__); |
ff7eb602 AC |
1090 | break; |
1091 | case CS8: | |
ff7eb602 | 1092 | default: |
4f2ab888 | 1093 | bits |= BITS_DATA_8; |
c2b33559 | 1094 | dev_dbg(dev, "%s - data bits = 8\n", __func__); |
4f2ab888 | 1095 | break; |
1da177e4 | 1096 | } |
19165b2b | 1097 | if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
660f3b14 | 1098 | dev_dbg(dev, "Number of data bits requested not supported by device\n"); |
1da177e4 LT |
1099 | } |
1100 | ||
4b6181ca RK |
1101 | if ((cflag & (PARENB|PARODD|CMSPAR)) != |
1102 | (old_cflag & (PARENB|PARODD|CMSPAR))) { | |
d0bf1ff0 | 1103 | cp210x_get_line_ctl(port, &bits); |
1da177e4 LT |
1104 | bits &= ~BITS_PARITY_MASK; |
1105 | if (cflag & PARENB) { | |
4b6181ca | 1106 | if (cflag & CMSPAR) { |
660f3b14 GKH |
1107 | if (cflag & PARODD) { |
1108 | bits |= BITS_PARITY_MARK; | |
1109 | dev_dbg(dev, "%s - parity = MARK\n", __func__); | |
1110 | } else { | |
1111 | bits |= BITS_PARITY_SPACE; | |
1112 | dev_dbg(dev, "%s - parity = SPACE\n", __func__); | |
1113 | } | |
1da177e4 | 1114 | } else { |
660f3b14 GKH |
1115 | if (cflag & PARODD) { |
1116 | bits |= BITS_PARITY_ODD; | |
1117 | dev_dbg(dev, "%s - parity = ODD\n", __func__); | |
1118 | } else { | |
1119 | bits |= BITS_PARITY_EVEN; | |
1120 | dev_dbg(dev, "%s - parity = EVEN\n", __func__); | |
1121 | } | |
1da177e4 LT |
1122 | } |
1123 | } | |
19165b2b | 1124 | if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
660f3b14 | 1125 | dev_dbg(dev, "Parity mode not supported by device\n"); |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { | |
d0bf1ff0 | 1129 | cp210x_get_line_ctl(port, &bits); |
1da177e4 LT |
1130 | bits &= ~BITS_STOP_MASK; |
1131 | if (cflag & CSTOPB) { | |
1132 | bits |= BITS_STOP_2; | |
660f3b14 | 1133 | dev_dbg(dev, "%s - stop bits = 2\n", __func__); |
1da177e4 LT |
1134 | } else { |
1135 | bits |= BITS_STOP_1; | |
660f3b14 | 1136 | dev_dbg(dev, "%s - stop bits = 1\n", __func__); |
1da177e4 | 1137 | } |
19165b2b | 1138 | if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits)) |
660f3b14 | 1139 | dev_dbg(dev, "Number of stop bits requested not supported by device\n"); |
1da177e4 | 1140 | } |
39a66b8d CS |
1141 | |
1142 | if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { | |
9034389c KS |
1143 | struct cp210x_flow_ctl flow_ctl; |
1144 | u32 ctl_hs; | |
1145 | u32 flow_repl; | |
7084fa86 | 1146 | |
9034389c KS |
1147 | cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl, |
1148 | sizeof(flow_ctl)); | |
1149 | ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake); | |
1150 | flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace); | |
1151 | dev_dbg(dev, "%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n", | |
1152 | __func__, ctl_hs, flow_repl); | |
39a66b8d | 1153 | |
ab5701ad KS |
1154 | ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE; |
1155 | ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE; | |
1156 | ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY; | |
1157 | ctl_hs &= ~CP210X_SERIAL_DTR_MASK; | |
1158 | ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE); | |
39a66b8d | 1159 | if (cflag & CRTSCTS) { |
9034389c | 1160 | ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE; |
ab5701ad KS |
1161 | |
1162 | flow_repl &= ~CP210X_SERIAL_RTS_MASK; | |
9034389c KS |
1163 | flow_repl |= CP210X_SERIAL_RTS_SHIFT( |
1164 | CP210X_SERIAL_RTS_FLOW_CTL); | |
660f3b14 | 1165 | dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); |
39a66b8d | 1166 | } else { |
ab5701ad KS |
1167 | ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE; |
1168 | ||
1169 | flow_repl &= ~CP210X_SERIAL_RTS_MASK; | |
9034389c KS |
1170 | flow_repl |= CP210X_SERIAL_RTS_SHIFT( |
1171 | CP210X_SERIAL_RTS_ACTIVE); | |
660f3b14 | 1172 | dev_dbg(dev, "%s - flow control = NONE\n", __func__); |
39a66b8d CS |
1173 | } |
1174 | ||
9034389c KS |
1175 | dev_dbg(dev, "%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n", |
1176 | __func__, ctl_hs, flow_repl); | |
1177 | flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs); | |
1178 | flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl); | |
1179 | cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl, | |
1180 | sizeof(flow_ctl)); | |
39a66b8d CS |
1181 | } |
1182 | ||
1183 | } | |
1184 | ||
4f2ab888 | 1185 | static int cp210x_tiocmset(struct tty_struct *tty, |
39a66b8d CS |
1186 | unsigned int set, unsigned int clear) |
1187 | { | |
95da310e | 1188 | struct usb_serial_port *port = tty->driver_data; |
20b9d177 | 1189 | return cp210x_tiocmset_port(port, set, clear); |
d2ad67b3 V |
1190 | } |
1191 | ||
20b9d177 | 1192 | static int cp210x_tiocmset_port(struct usb_serial_port *port, |
d2ad67b3 V |
1193 | unsigned int set, unsigned int clear) |
1194 | { | |
19165b2b | 1195 | u16 control = 0; |
39a66b8d | 1196 | |
39a66b8d CS |
1197 | if (set & TIOCM_RTS) { |
1198 | control |= CONTROL_RTS; | |
1199 | control |= CONTROL_WRITE_RTS; | |
1200 | } | |
1201 | if (set & TIOCM_DTR) { | |
1202 | control |= CONTROL_DTR; | |
1203 | control |= CONTROL_WRITE_DTR; | |
1204 | } | |
1205 | if (clear & TIOCM_RTS) { | |
1206 | control &= ~CONTROL_RTS; | |
1207 | control |= CONTROL_WRITE_RTS; | |
1208 | } | |
1209 | if (clear & TIOCM_DTR) { | |
1210 | control &= ~CONTROL_DTR; | |
1211 | control |= CONTROL_WRITE_DTR; | |
1212 | } | |
1213 | ||
660f3b14 | 1214 | dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); |
39a66b8d | 1215 | |
19165b2b | 1216 | return cp210x_write_u16_reg(port, CP210X_SET_MHS, control); |
39a66b8d CS |
1217 | } |
1218 | ||
d94c7bd4 AC |
1219 | static void cp210x_dtr_rts(struct usb_serial_port *p, int on) |
1220 | { | |
1221 | if (on) | |
20b9d177 | 1222 | cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); |
d94c7bd4 | 1223 | else |
20b9d177 | 1224 | cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); |
d94c7bd4 AC |
1225 | } |
1226 | ||
4f2ab888 | 1227 | static int cp210x_tiocmget(struct tty_struct *tty) |
39a66b8d | 1228 | { |
95da310e | 1229 | struct usb_serial_port *port = tty->driver_data; |
fe1b07e9 | 1230 | u8 control; |
b2bdd1f5 | 1231 | int result; |
39a66b8d | 1232 | |
de24e0a1 JH |
1233 | result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control); |
1234 | if (result) | |
1235 | return result; | |
39a66b8d CS |
1236 | |
1237 | result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | |
1238 | |((control & CONTROL_RTS) ? TIOCM_RTS : 0) | |
1239 | |((control & CONTROL_CTS) ? TIOCM_CTS : 0) | |
1240 | |((control & CONTROL_DSR) ? TIOCM_DSR : 0) | |
1241 | |((control & CONTROL_RING)? TIOCM_RI : 0) | |
1242 | |((control & CONTROL_DCD) ? TIOCM_CD : 0); | |
1243 | ||
660f3b14 | 1244 | dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); |
39a66b8d CS |
1245 | |
1246 | return result; | |
1da177e4 LT |
1247 | } |
1248 | ||
4f2ab888 | 1249 | static void cp210x_break_ctl(struct tty_struct *tty, int break_state) |
1da177e4 | 1250 | { |
95da310e | 1251 | struct usb_serial_port *port = tty->driver_data; |
19165b2b | 1252 | u16 state; |
1da177e4 | 1253 | |
1da177e4 LT |
1254 | if (break_state == 0) |
1255 | state = BREAK_OFF; | |
1256 | else | |
1257 | state = BREAK_ON; | |
660f3b14 GKH |
1258 | dev_dbg(&port->dev, "%s - turning break %s\n", __func__, |
1259 | state == BREAK_OFF ? "off" : "on"); | |
19165b2b | 1260 | cp210x_write_u16_reg(port, CP210X_SET_BREAK, state); |
1da177e4 LT |
1261 | } |
1262 | ||
cf5276ce MW |
1263 | #ifdef CONFIG_GPIOLIB |
1264 | static int cp210x_gpio_request(struct gpio_chip *gc, unsigned int offset) | |
1265 | { | |
1266 | struct usb_serial *serial = gpiochip_get_data(gc); | |
1267 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); | |
1268 | ||
1269 | switch (offset) { | |
1270 | case 0: | |
1271 | if (priv->config & CP2105_GPIO0_TXLED_MODE) | |
1272 | return -ENODEV; | |
1273 | break; | |
1274 | case 1: | |
1275 | if (priv->config & (CP2105_GPIO1_RXLED_MODE | | |
1276 | CP2105_GPIO1_RS485_MODE)) | |
1277 | return -ENODEV; | |
1278 | break; | |
1279 | } | |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio) | |
1285 | { | |
1286 | struct usb_serial *serial = gpiochip_get_data(gc); | |
1287 | int result; | |
1288 | u8 buf; | |
1289 | ||
1290 | result = cp210x_read_vendor_block(serial, REQTYPE_INTERFACE_TO_HOST, | |
1291 | CP210X_READ_LATCH, &buf, sizeof(buf)); | |
1292 | if (result < 0) | |
1293 | return result; | |
1294 | ||
1295 | return !!(buf & BIT(gpio)); | |
1296 | } | |
1297 | ||
1298 | static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value) | |
1299 | { | |
1300 | struct usb_serial *serial = gpiochip_get_data(gc); | |
1301 | struct cp210x_gpio_write buf; | |
1302 | ||
1303 | if (value == 1) | |
1304 | buf.state = BIT(gpio); | |
1305 | else | |
1306 | buf.state = 0; | |
1307 | ||
1308 | buf.mask = BIT(gpio); | |
1309 | ||
1310 | cp210x_write_vendor_block(serial, REQTYPE_HOST_TO_INTERFACE, | |
1311 | CP210X_WRITE_LATCH, &buf, sizeof(buf)); | |
1312 | } | |
1313 | ||
1314 | static int cp210x_gpio_direction_get(struct gpio_chip *gc, unsigned int gpio) | |
1315 | { | |
1316 | /* Hardware does not support an input mode */ | |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | static int cp210x_gpio_direction_input(struct gpio_chip *gc, unsigned int gpio) | |
1321 | { | |
1322 | /* Hardware does not support an input mode */ | |
1323 | return -ENOTSUPP; | |
1324 | } | |
1325 | ||
1326 | static int cp210x_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio, | |
1327 | int value) | |
1328 | { | |
1329 | return 0; | |
1330 | } | |
1331 | ||
1332 | static int cp210x_gpio_set_single_ended(struct gpio_chip *gc, unsigned int gpio, | |
1333 | enum single_ended_mode mode) | |
1334 | { | |
1335 | struct usb_serial *serial = gpiochip_get_data(gc); | |
1336 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); | |
1337 | ||
1338 | /* Succeed only if in correct mode (this can't be set at runtime) */ | |
1339 | if ((mode == LINE_MODE_PUSH_PULL) && (priv->gpio_mode & BIT(gpio))) | |
1340 | return 0; | |
1341 | ||
1342 | if ((mode == LINE_MODE_OPEN_DRAIN) && !(priv->gpio_mode & BIT(gpio))) | |
1343 | return 0; | |
1344 | ||
1345 | return -ENOTSUPP; | |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * This function is for configuring GPIO using shared pins, where other signals | |
1350 | * are made unavailable by configuring the use of GPIO. This is believed to be | |
1351 | * only applicable to the cp2105 at this point, the other devices supported by | |
1352 | * this driver that provide GPIO do so in a way that does not impact other | |
1353 | * signals and are thus expected to have very different initialisation. | |
1354 | */ | |
1355 | static int cp2105_shared_gpio_init(struct usb_serial *serial) | |
1356 | { | |
1357 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); | |
1358 | struct cp210x_pin_mode mode; | |
1359 | struct cp210x_config config; | |
1360 | u8 intf_num = cp210x_interface_num(serial); | |
1361 | int result; | |
1362 | ||
1363 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, | |
1364 | CP210X_GET_DEVICEMODE, &mode, | |
1365 | sizeof(mode)); | |
1366 | if (result < 0) | |
1367 | return result; | |
1368 | ||
1369 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, | |
1370 | CP210X_GET_PORTCONFIG, &config, | |
1371 | sizeof(config)); | |
1372 | if (result < 0) | |
1373 | return result; | |
1374 | ||
1375 | /* 2 banks of GPIO - One for the pins taken from each serial port */ | |
1376 | if (intf_num == 0) { | |
1377 | if (mode.eci == CP210X_PIN_MODE_MODEM) | |
1378 | return 0; | |
1379 | ||
1380 | priv->config = config.eci_cfg; | |
1381 | priv->gpio_mode = (u8)((le16_to_cpu(config.gpio_mode) & | |
1382 | CP210X_ECI_GPIO_MODE_MASK) >> | |
1383 | CP210X_ECI_GPIO_MODE_OFFSET); | |
1384 | priv->gc.ngpio = 2; | |
1385 | } else if (intf_num == 1) { | |
1386 | if (mode.sci == CP210X_PIN_MODE_MODEM) | |
1387 | return 0; | |
1388 | ||
1389 | priv->config = config.sci_cfg; | |
1390 | priv->gpio_mode = (u8)((le16_to_cpu(config.gpio_mode) & | |
1391 | CP210X_SCI_GPIO_MODE_MASK) >> | |
1392 | CP210X_SCI_GPIO_MODE_OFFSET); | |
1393 | priv->gc.ngpio = 3; | |
1394 | } else { | |
1395 | return -ENODEV; | |
1396 | } | |
1397 | ||
1398 | priv->gc.label = "cp210x"; | |
1399 | priv->gc.request = cp210x_gpio_request; | |
1400 | priv->gc.get_direction = cp210x_gpio_direction_get; | |
1401 | priv->gc.direction_input = cp210x_gpio_direction_input; | |
1402 | priv->gc.direction_output = cp210x_gpio_direction_output; | |
1403 | priv->gc.get = cp210x_gpio_get; | |
1404 | priv->gc.set = cp210x_gpio_set; | |
1405 | priv->gc.set_single_ended = cp210x_gpio_set_single_ended; | |
1406 | priv->gc.owner = THIS_MODULE; | |
1407 | priv->gc.parent = &serial->interface->dev; | |
1408 | priv->gc.base = -1; | |
1409 | priv->gc.can_sleep = true; | |
1410 | ||
1411 | result = gpiochip_add_data(&priv->gc, serial); | |
1412 | if (!result) | |
6b7271d2 | 1413 | priv->gpio_registered = true; |
cf5276ce MW |
1414 | |
1415 | return result; | |
1416 | } | |
1417 | ||
1418 | static void cp210x_gpio_remove(struct usb_serial *serial) | |
1419 | { | |
1420 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); | |
1421 | ||
1422 | if (priv->gpio_registered) { | |
1423 | gpiochip_remove(&priv->gc); | |
6b7271d2 | 1424 | priv->gpio_registered = false; |
cf5276ce MW |
1425 | } |
1426 | } | |
1427 | ||
1428 | #else | |
1429 | ||
1430 | static int cp2105_shared_gpio_init(struct usb_serial *serial) | |
1431 | { | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | static void cp210x_gpio_remove(struct usb_serial *serial) | |
1436 | { | |
1437 | /* Nothing to do */ | |
1438 | } | |
1439 | ||
1440 | #endif | |
1441 | ||
e2ae67a3 | 1442 | static int cp210x_port_probe(struct usb_serial_port *port) |
1da177e4 | 1443 | { |
e2ae67a3 | 1444 | struct usb_serial *serial = port->serial; |
e2ae67a3 | 1445 | struct cp210x_port_private *port_priv; |
d0bf1ff0 | 1446 | int ret; |
a5360a53 | 1447 | |
e2ae67a3 KS |
1448 | port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL); |
1449 | if (!port_priv) | |
4295fe77 | 1450 | return -ENOMEM; |
a5360a53 | 1451 | |
cf5276ce | 1452 | port_priv->bInterfaceNumber = cp210x_interface_num(serial); |
a5360a53 | 1453 | |
e2ae67a3 | 1454 | usb_set_serial_port_data(port, port_priv); |
a5360a53 | 1455 | |
d0bf1ff0 KS |
1456 | ret = cp210x_detect_swapped_line_ctl(port); |
1457 | if (ret) { | |
1458 | kfree(port_priv); | |
1459 | return ret; | |
1460 | } | |
a5360a53 | 1461 | |
1da177e4 LT |
1462 | return 0; |
1463 | } | |
1464 | ||
e2ae67a3 | 1465 | static int cp210x_port_remove(struct usb_serial_port *port) |
a5360a53 | 1466 | { |
e2ae67a3 KS |
1467 | struct cp210x_port_private *port_priv; |
1468 | ||
1469 | port_priv = usb_get_serial_port_data(port); | |
1470 | kfree(port_priv); | |
a5360a53 | 1471 | |
e2ae67a3 | 1472 | return 0; |
a5360a53 PF |
1473 | } |
1474 | ||
cf5276ce MW |
1475 | static int cp210x_attach(struct usb_serial *serial) |
1476 | { | |
1477 | int result; | |
1478 | struct cp210x_serial_private *priv; | |
1479 | ||
1480 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
1481 | if (!priv) | |
1482 | return -ENOMEM; | |
1483 | ||
1484 | result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, | |
1485 | CP210X_GET_PARTNUM, &priv->partnum, | |
1486 | sizeof(priv->partnum)); | |
1487 | if (result < 0) | |
1488 | goto err_free_priv; | |
1489 | ||
1490 | usb_set_serial_data(serial, priv); | |
1491 | ||
1492 | if (priv->partnum == CP210X_PARTNUM_CP2105) { | |
1493 | result = cp2105_shared_gpio_init(serial); | |
1494 | if (result < 0) { | |
1495 | dev_err(&serial->interface->dev, | |
1496 | "GPIO initialisation failed, continuing without GPIO support\n"); | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | return 0; | |
1501 | err_free_priv: | |
1502 | kfree(priv); | |
1503 | ||
1504 | return result; | |
1505 | } | |
1506 | ||
1507 | static void cp210x_disconnect(struct usb_serial *serial) | |
1508 | { | |
1509 | cp210x_gpio_remove(serial); | |
1510 | } | |
1511 | ||
1512 | static void cp210x_release(struct usb_serial *serial) | |
1513 | { | |
1514 | struct cp210x_serial_private *priv = usb_get_serial_data(serial); | |
1515 | ||
1516 | cp210x_gpio_remove(serial); | |
1517 | ||
1518 | kfree(priv); | |
1519 | } | |
1520 | ||
68e24113 | 1521 | module_usb_serial_driver(serial_drivers, id_table); |
1da177e4 LT |
1522 | |
1523 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 | 1524 | MODULE_LICENSE("GPL"); |