1 /* 2 * Silicon Laboratories CP210x USB to RS232 serial adaptor driver 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 * 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 * 14 */ 15 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> 24 #include <linux/uaccess.h> 25 #include <linux/usb/serial.h> 26 27 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" 28 29 /* 30 * Function Prototypes 31 */ 32 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *); 33 static void cp210x_close(struct usb_serial_port *); 34 static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *); 35 static void cp210x_get_termios_port(struct usb_serial_port *port, 36 unsigned int *cflagp, unsigned int *baudp); 37 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *, 38 struct ktermios *); 39 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, 40 struct ktermios*); 41 static int cp210x_tiocmget(struct tty_struct *); 42 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int); 43 static int cp210x_tiocmset_port(struct usb_serial_port *port, 44 unsigned int, unsigned int); 45 static void cp210x_break_ctl(struct tty_struct *, int); 46 static int cp210x_startup(struct usb_serial *); 47 static void cp210x_release(struct usb_serial *); 48 static void cp210x_dtr_rts(struct usb_serial_port *p, int on); 49 50 static const struct usb_device_id id_table[] = { 51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */ 52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ 53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ 55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ 56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */ 57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ 58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ 59 { USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */ 60 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ 61 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ 62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ 63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ 64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ 65 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */ 66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ 67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ 68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ 69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ 70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ 71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ 72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ 73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ 74 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */ 75 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ 76 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ 77 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ 78 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ 79 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ 80 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ 81 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */ 82 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ 83 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ 84 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ 85 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ 86 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ 87 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ 88 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ 89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ 90 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */ 91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */ 92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ 93 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */ 94 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */ 95 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ 96 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ 97 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */ 98 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ 99 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ 100 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ 101 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ 102 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ 103 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ 104 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ 105 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ 106 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ 107 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */ 108 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */ 109 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */ 110 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ 111 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ 112 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ 113 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ 114 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */ 115 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ 116 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */ 117 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ 118 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */ 119 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */ 120 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */ 121 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */ 122 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */ 123 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */ 124 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */ 125 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */ 126 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */ 127 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */ 128 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */ 129 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */ 130 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */ 131 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */ 132 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ 133 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ 134 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */ 135 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */ 136 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ 137 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ 138 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ 139 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ 140 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ 141 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ 142 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ 143 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ 144 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ 145 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */ 146 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */ 147 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ 148 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */ 149 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */ 150 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */ 151 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */ 152 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */ 153 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */ 154 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ 155 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */ 156 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */ 157 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */ 158 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */ 159 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */ 160 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */ 161 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ 162 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ 163 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ 164 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */ 165 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */ 166 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */ 167 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */ 168 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */ 169 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */ 170 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */ 171 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */ 172 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */ 173 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */ 174 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */ 175 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */ 176 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */ 177 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */ 178 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */ 179 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */ 180 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */ 181 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */ 182 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */ 183 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */ 184 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */ 185 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */ 186 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */ 187 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */ 188 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */ 189 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */ 190 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */ 191 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */ 192 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */ 193 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */ 194 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ 195 { } /* Terminating Entry */ 196 }; 197 198 MODULE_DEVICE_TABLE(usb, id_table); 199 200 struct cp210x_serial_private { 201 __u8 bInterfaceNumber; 202 }; 203 204 static struct usb_serial_driver cp210x_device = { 205 .driver = { 206 .owner = THIS_MODULE, 207 .name = "cp210x", 208 }, 209 .id_table = id_table, 210 .num_ports = 1, 211 .bulk_in_size = 256, 212 .bulk_out_size = 256, 213 .open = cp210x_open, 214 .close = cp210x_close, 215 .break_ctl = cp210x_break_ctl, 216 .set_termios = cp210x_set_termios, 217 .tiocmget = cp210x_tiocmget, 218 .tiocmset = cp210x_tiocmset, 219 .attach = cp210x_startup, 220 .release = cp210x_release, 221 .dtr_rts = cp210x_dtr_rts 222 }; 223 224 static struct usb_serial_driver * const serial_drivers[] = { 225 &cp210x_device, NULL 226 }; 227 228 /* Config request types */ 229 #define REQTYPE_HOST_TO_INTERFACE 0x41 230 #define REQTYPE_INTERFACE_TO_HOST 0xc1 231 #define REQTYPE_HOST_TO_DEVICE 0x40 232 #define REQTYPE_DEVICE_TO_HOST 0xc0 233 234 /* Config request codes */ 235 #define CP210X_IFC_ENABLE 0x00 236 #define CP210X_SET_BAUDDIV 0x01 237 #define CP210X_GET_BAUDDIV 0x02 238 #define CP210X_SET_LINE_CTL 0x03 239 #define CP210X_GET_LINE_CTL 0x04 240 #define CP210X_SET_BREAK 0x05 241 #define CP210X_IMM_CHAR 0x06 242 #define CP210X_SET_MHS 0x07 243 #define CP210X_GET_MDMSTS 0x08 244 #define CP210X_SET_XON 0x09 245 #define CP210X_SET_XOFF 0x0A 246 #define CP210X_SET_EVENTMASK 0x0B 247 #define CP210X_GET_EVENTMASK 0x0C 248 #define CP210X_SET_CHAR 0x0D 249 #define CP210X_GET_CHARS 0x0E 250 #define CP210X_GET_PROPS 0x0F 251 #define CP210X_GET_COMM_STATUS 0x10 252 #define CP210X_RESET 0x11 253 #define CP210X_PURGE 0x12 254 #define CP210X_SET_FLOW 0x13 255 #define CP210X_GET_FLOW 0x14 256 #define CP210X_EMBED_EVENTS 0x15 257 #define CP210X_GET_EVENTSTATE 0x16 258 #define CP210X_SET_CHARS 0x19 259 #define CP210X_GET_BAUDRATE 0x1D 260 #define CP210X_SET_BAUDRATE 0x1E 261 262 /* CP210X_IFC_ENABLE */ 263 #define UART_ENABLE 0x0001 264 #define UART_DISABLE 0x0000 265 266 /* CP210X_(SET|GET)_BAUDDIV */ 267 #define BAUD_RATE_GEN_FREQ 0x384000 268 269 /* CP210X_(SET|GET)_LINE_CTL */ 270 #define BITS_DATA_MASK 0X0f00 271 #define BITS_DATA_5 0X0500 272 #define BITS_DATA_6 0X0600 273 #define BITS_DATA_7 0X0700 274 #define BITS_DATA_8 0X0800 275 #define BITS_DATA_9 0X0900 276 277 #define BITS_PARITY_MASK 0x00f0 278 #define BITS_PARITY_NONE 0x0000 279 #define BITS_PARITY_ODD 0x0010 280 #define BITS_PARITY_EVEN 0x0020 281 #define BITS_PARITY_MARK 0x0030 282 #define BITS_PARITY_SPACE 0x0040 283 284 #define BITS_STOP_MASK 0x000f 285 #define BITS_STOP_1 0x0000 286 #define BITS_STOP_1_5 0x0001 287 #define BITS_STOP_2 0x0002 288 289 /* CP210X_SET_BREAK */ 290 #define BREAK_ON 0x0001 291 #define BREAK_OFF 0x0000 292 293 /* CP210X_(SET_MHS|GET_MDMSTS) */ 294 #define CONTROL_DTR 0x0001 295 #define CONTROL_RTS 0x0002 296 #define CONTROL_CTS 0x0010 297 #define CONTROL_DSR 0x0020 298 #define CONTROL_RING 0x0040 299 #define CONTROL_DCD 0x0080 300 #define CONTROL_WRITE_DTR 0x0100 301 #define CONTROL_WRITE_RTS 0x0200 302 303 /* 304 * cp210x_get_config 305 * Reads from the CP210x configuration registers 306 * 'size' is specified in bytes. 307 * 'data' is a pointer to a pre-allocated array of integers large 308 * enough to hold 'size' bytes (with 4 bytes to each integer) 309 */ 310 static int cp210x_get_config(struct usb_serial_port *port, u8 request, 311 unsigned int *data, int size) 312 { 313 struct usb_serial *serial = port->serial; 314 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 315 __le32 *buf; 316 int result, i, length; 317 318 /* Number of integers required to contain the array */ 319 length = (((size - 1) | 3) + 1) / 4; 320 321 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); 322 if (!buf) 323 return -ENOMEM; 324 325 /* Issue the request, attempting to read 'size' bytes */ 326 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 327 request, REQTYPE_INTERFACE_TO_HOST, 0x0000, 328 spriv->bInterfaceNumber, buf, size, 329 USB_CTRL_GET_TIMEOUT); 330 331 /* Convert data into an array of integers */ 332 for (i = 0; i < length; i++) 333 data[i] = le32_to_cpu(buf[i]); 334 335 kfree(buf); 336 337 if (result != size) { 338 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n", 339 __func__, request, size, result); 340 if (result > 0) 341 result = -EPROTO; 342 343 return result; 344 } 345 346 return 0; 347 } 348 349 /* 350 * cp210x_set_config 351 * Writes to the CP210x configuration registers 352 * Values less than 16 bits wide are sent directly 353 * 'size' is specified in bytes. 354 */ 355 static int cp210x_set_config(struct usb_serial_port *port, u8 request, 356 unsigned int *data, int size) 357 { 358 struct usb_serial *serial = port->serial; 359 struct cp210x_serial_private *spriv = usb_get_serial_data(serial); 360 __le32 *buf; 361 int result, i, length; 362 363 /* Number of integers required to contain the array */ 364 length = (((size - 1) | 3) + 1) / 4; 365 366 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); 367 if (!buf) 368 return -ENOMEM; 369 370 /* Array of integers into bytes */ 371 for (i = 0; i < length; i++) 372 buf[i] = cpu_to_le32(data[i]); 373 374 if (size > 2) { 375 result = usb_control_msg(serial->dev, 376 usb_sndctrlpipe(serial->dev, 0), 377 request, REQTYPE_HOST_TO_INTERFACE, 0x0000, 378 spriv->bInterfaceNumber, buf, size, 379 USB_CTRL_SET_TIMEOUT); 380 } else { 381 result = usb_control_msg(serial->dev, 382 usb_sndctrlpipe(serial->dev, 0), 383 request, REQTYPE_HOST_TO_INTERFACE, data[0], 384 spriv->bInterfaceNumber, NULL, 0, 385 USB_CTRL_SET_TIMEOUT); 386 } 387 388 kfree(buf); 389 390 if ((size > 2 && result != size) || result < 0) { 391 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n", 392 __func__, request, size, result); 393 if (result > 0) 394 result = -EPROTO; 395 396 return result; 397 } 398 399 return 0; 400 } 401 402 /* 403 * cp210x_set_config_single 404 * Convenience function for calling cp210x_set_config on single data values 405 * without requiring an integer pointer 406 */ 407 static inline int cp210x_set_config_single(struct usb_serial_port *port, 408 u8 request, unsigned int data) 409 { 410 return cp210x_set_config(port, request, &data, 2); 411 } 412 413 /* 414 * cp210x_quantise_baudrate 415 * Quantises the baud rate as per AN205 Table 1 416 */ 417 static unsigned int cp210x_quantise_baudrate(unsigned int baud) 418 { 419 if (baud <= 300) 420 baud = 300; 421 else if (baud <= 600) baud = 600; 422 else if (baud <= 1200) baud = 1200; 423 else if (baud <= 1800) baud = 1800; 424 else if (baud <= 2400) baud = 2400; 425 else if (baud <= 4000) baud = 4000; 426 else if (baud <= 4803) baud = 4800; 427 else if (baud <= 7207) baud = 7200; 428 else if (baud <= 9612) baud = 9600; 429 else if (baud <= 14428) baud = 14400; 430 else if (baud <= 16062) baud = 16000; 431 else if (baud <= 19250) baud = 19200; 432 else if (baud <= 28912) baud = 28800; 433 else if (baud <= 38601) baud = 38400; 434 else if (baud <= 51558) baud = 51200; 435 else if (baud <= 56280) baud = 56000; 436 else if (baud <= 58053) baud = 57600; 437 else if (baud <= 64111) baud = 64000; 438 else if (baud <= 77608) baud = 76800; 439 else if (baud <= 117028) baud = 115200; 440 else if (baud <= 129347) baud = 128000; 441 else if (baud <= 156868) baud = 153600; 442 else if (baud <= 237832) baud = 230400; 443 else if (baud <= 254234) baud = 250000; 444 else if (baud <= 273066) baud = 256000; 445 else if (baud <= 491520) baud = 460800; 446 else if (baud <= 567138) baud = 500000; 447 else if (baud <= 670254) baud = 576000; 448 else if (baud < 1000000) 449 baud = 921600; 450 else if (baud > 2000000) 451 baud = 2000000; 452 return baud; 453 } 454 455 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port) 456 { 457 int result; 458 459 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE, 460 UART_ENABLE); 461 if (result) { 462 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); 463 return result; 464 } 465 466 /* Configure the termios structure */ 467 cp210x_get_termios(tty, port); 468 469 /* The baud rate must be initialised on cp2104 */ 470 if (tty) 471 cp210x_change_speed(tty, port, NULL); 472 473 return usb_serial_generic_open(tty, port); 474 } 475 476 static void cp210x_close(struct usb_serial_port *port) 477 { 478 usb_serial_generic_close(port); 479 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); 480 } 481 482 /* 483 * cp210x_get_termios 484 * Reads the baud rate, data bits, parity, stop bits and flow control mode 485 * from the device, corrects any unsupported values, and configures the 486 * termios structure to reflect the state of the device 487 */ 488 static void cp210x_get_termios(struct tty_struct *tty, 489 struct usb_serial_port *port) 490 { 491 unsigned int baud; 492 493 if (tty) { 494 cp210x_get_termios_port(tty->driver_data, 495 &tty->termios.c_cflag, &baud); 496 tty_encode_baud_rate(tty, baud, baud); 497 } else { 498 unsigned int cflag; 499 cflag = 0; 500 cp210x_get_termios_port(port, &cflag, &baud); 501 } 502 } 503 504 /* 505 * cp210x_get_termios_port 506 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. 507 */ 508 static void cp210x_get_termios_port(struct usb_serial_port *port, 509 unsigned int *cflagp, unsigned int *baudp) 510 { 511 struct device *dev = &port->dev; 512 unsigned int cflag, modem_ctl[4]; 513 unsigned int baud; 514 unsigned int bits; 515 516 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4); 517 518 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud); 519 *baudp = baud; 520 521 cflag = *cflagp; 522 523 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 524 cflag &= ~CSIZE; 525 switch (bits & BITS_DATA_MASK) { 526 case BITS_DATA_5: 527 dev_dbg(dev, "%s - data bits = 5\n", __func__); 528 cflag |= CS5; 529 break; 530 case BITS_DATA_6: 531 dev_dbg(dev, "%s - data bits = 6\n", __func__); 532 cflag |= CS6; 533 break; 534 case BITS_DATA_7: 535 dev_dbg(dev, "%s - data bits = 7\n", __func__); 536 cflag |= CS7; 537 break; 538 case BITS_DATA_8: 539 dev_dbg(dev, "%s - data bits = 8\n", __func__); 540 cflag |= CS8; 541 break; 542 case BITS_DATA_9: 543 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__); 544 cflag |= CS8; 545 bits &= ~BITS_DATA_MASK; 546 bits |= BITS_DATA_8; 547 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 548 break; 549 default: 550 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__); 551 cflag |= CS8; 552 bits &= ~BITS_DATA_MASK; 553 bits |= BITS_DATA_8; 554 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 555 break; 556 } 557 558 switch (bits & BITS_PARITY_MASK) { 559 case BITS_PARITY_NONE: 560 dev_dbg(dev, "%s - parity = NONE\n", __func__); 561 cflag &= ~PARENB; 562 break; 563 case BITS_PARITY_ODD: 564 dev_dbg(dev, "%s - parity = ODD\n", __func__); 565 cflag |= (PARENB|PARODD); 566 break; 567 case BITS_PARITY_EVEN: 568 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 569 cflag &= ~PARODD; 570 cflag |= PARENB; 571 break; 572 case BITS_PARITY_MARK: 573 dev_dbg(dev, "%s - parity = MARK\n", __func__); 574 cflag |= (PARENB|PARODD|CMSPAR); 575 break; 576 case BITS_PARITY_SPACE: 577 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 578 cflag &= ~PARODD; 579 cflag |= (PARENB|CMSPAR); 580 break; 581 default: 582 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__); 583 cflag &= ~PARENB; 584 bits &= ~BITS_PARITY_MASK; 585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 586 break; 587 } 588 589 cflag &= ~CSTOPB; 590 switch (bits & BITS_STOP_MASK) { 591 case BITS_STOP_1: 592 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 593 break; 594 case BITS_STOP_1_5: 595 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__); 596 bits &= ~BITS_STOP_MASK; 597 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 598 break; 599 case BITS_STOP_2: 600 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 601 cflag |= CSTOPB; 602 break; 603 default: 604 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__); 605 bits &= ~BITS_STOP_MASK; 606 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); 607 break; 608 } 609 610 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 611 if (modem_ctl[0] & 0x0008) { 612 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 613 cflag |= CRTSCTS; 614 } else { 615 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 616 cflag &= ~CRTSCTS; 617 } 618 619 *cflagp = cflag; 620 } 621 622 /* 623 * CP2101 supports the following baud rates: 624 * 625 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800, 626 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600 627 * 628 * CP2102 and CP2103 support the following additional rates: 629 * 630 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000, 631 * 576000 632 * 633 * The device will map a requested rate to a supported one, but the result 634 * of requests for rates greater than 1053257 is undefined (see AN205). 635 * 636 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud, 637 * respectively, with an error less than 1%. The actual rates are determined 638 * by 639 * 640 * div = round(freq / (2 x prescale x request)) 641 * actual = freq / (2 x prescale x div) 642 * 643 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps 644 * or 1 otherwise. 645 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1 646 * otherwise. 647 */ 648 static void cp210x_change_speed(struct tty_struct *tty, 649 struct usb_serial_port *port, struct ktermios *old_termios) 650 { 651 u32 baud; 652 653 baud = tty->termios.c_ospeed; 654 655 /* This maps the requested rate to a rate valid on cp2102 or cp2103, 656 * or to an arbitrary rate in [1M,2M]. 657 * 658 * NOTE: B0 is not implemented. 659 */ 660 baud = cp210x_quantise_baudrate(baud); 661 662 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud); 663 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud, 664 sizeof(baud))) { 665 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud); 666 if (old_termios) 667 baud = old_termios->c_ospeed; 668 else 669 baud = 9600; 670 } 671 672 tty_encode_baud_rate(tty, baud, baud); 673 } 674 675 static void cp210x_set_termios(struct tty_struct *tty, 676 struct usb_serial_port *port, struct ktermios *old_termios) 677 { 678 struct device *dev = &port->dev; 679 unsigned int cflag, old_cflag; 680 unsigned int bits; 681 unsigned int modem_ctl[4]; 682 683 cflag = tty->termios.c_cflag; 684 old_cflag = old_termios->c_cflag; 685 686 if (tty->termios.c_ospeed != old_termios->c_ospeed) 687 cp210x_change_speed(tty, port, old_termios); 688 689 /* If the number of data bits is to be updated */ 690 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 691 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 692 bits &= ~BITS_DATA_MASK; 693 switch (cflag & CSIZE) { 694 case CS5: 695 bits |= BITS_DATA_5; 696 dev_dbg(dev, "%s - data bits = 5\n", __func__); 697 break; 698 case CS6: 699 bits |= BITS_DATA_6; 700 dev_dbg(dev, "%s - data bits = 6\n", __func__); 701 break; 702 case CS7: 703 bits |= BITS_DATA_7; 704 dev_dbg(dev, "%s - data bits = 7\n", __func__); 705 break; 706 case CS8: 707 bits |= BITS_DATA_8; 708 dev_dbg(dev, "%s - data bits = 8\n", __func__); 709 break; 710 /*case CS9: 711 bits |= BITS_DATA_9; 712 dev_dbg(dev, "%s - data bits = 9\n", __func__); 713 break;*/ 714 default: 715 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n"); 716 bits |= BITS_DATA_8; 717 break; 718 } 719 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 720 dev_dbg(dev, "Number of data bits requested not supported by device\n"); 721 } 722 723 if ((cflag & (PARENB|PARODD|CMSPAR)) != 724 (old_cflag & (PARENB|PARODD|CMSPAR))) { 725 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 726 bits &= ~BITS_PARITY_MASK; 727 if (cflag & PARENB) { 728 if (cflag & CMSPAR) { 729 if (cflag & PARODD) { 730 bits |= BITS_PARITY_MARK; 731 dev_dbg(dev, "%s - parity = MARK\n", __func__); 732 } else { 733 bits |= BITS_PARITY_SPACE; 734 dev_dbg(dev, "%s - parity = SPACE\n", __func__); 735 } 736 } else { 737 if (cflag & PARODD) { 738 bits |= BITS_PARITY_ODD; 739 dev_dbg(dev, "%s - parity = ODD\n", __func__); 740 } else { 741 bits |= BITS_PARITY_EVEN; 742 dev_dbg(dev, "%s - parity = EVEN\n", __func__); 743 } 744 } 745 } 746 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 747 dev_dbg(dev, "Parity mode not supported by device\n"); 748 } 749 750 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { 751 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); 752 bits &= ~BITS_STOP_MASK; 753 if (cflag & CSTOPB) { 754 bits |= BITS_STOP_2; 755 dev_dbg(dev, "%s - stop bits = 2\n", __func__); 756 } else { 757 bits |= BITS_STOP_1; 758 dev_dbg(dev, "%s - stop bits = 1\n", __func__); 759 } 760 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) 761 dev_dbg(dev, "Number of stop bits requested not supported by device\n"); 762 } 763 764 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 765 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); 766 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 767 __func__, modem_ctl[0], modem_ctl[1], 768 modem_ctl[2], modem_ctl[3]); 769 770 if (cflag & CRTSCTS) { 771 modem_ctl[0] &= ~0x7B; 772 modem_ctl[0] |= 0x09; 773 modem_ctl[1] = 0x80; 774 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__); 775 } else { 776 modem_ctl[0] &= ~0x7B; 777 modem_ctl[0] |= 0x01; 778 modem_ctl[1] |= 0x40; 779 dev_dbg(dev, "%s - flow control = NONE\n", __func__); 780 } 781 782 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n", 783 __func__, modem_ctl[0], modem_ctl[1], 784 modem_ctl[2], modem_ctl[3]); 785 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); 786 } 787 788 } 789 790 static int cp210x_tiocmset(struct tty_struct *tty, 791 unsigned int set, unsigned int clear) 792 { 793 struct usb_serial_port *port = tty->driver_data; 794 return cp210x_tiocmset_port(port, set, clear); 795 } 796 797 static int cp210x_tiocmset_port(struct usb_serial_port *port, 798 unsigned int set, unsigned int clear) 799 { 800 unsigned int control = 0; 801 802 if (set & TIOCM_RTS) { 803 control |= CONTROL_RTS; 804 control |= CONTROL_WRITE_RTS; 805 } 806 if (set & TIOCM_DTR) { 807 control |= CONTROL_DTR; 808 control |= CONTROL_WRITE_DTR; 809 } 810 if (clear & TIOCM_RTS) { 811 control &= ~CONTROL_RTS; 812 control |= CONTROL_WRITE_RTS; 813 } 814 if (clear & TIOCM_DTR) { 815 control &= ~CONTROL_DTR; 816 control |= CONTROL_WRITE_DTR; 817 } 818 819 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control); 820 821 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); 822 } 823 824 static void cp210x_dtr_rts(struct usb_serial_port *p, int on) 825 { 826 if (on) 827 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0); 828 else 829 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS); 830 } 831 832 static int cp210x_tiocmget(struct tty_struct *tty) 833 { 834 struct usb_serial_port *port = tty->driver_data; 835 unsigned int control; 836 int result; 837 838 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); 839 840 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) 841 |((control & CONTROL_RTS) ? TIOCM_RTS : 0) 842 |((control & CONTROL_CTS) ? TIOCM_CTS : 0) 843 |((control & CONTROL_DSR) ? TIOCM_DSR : 0) 844 |((control & CONTROL_RING)? TIOCM_RI : 0) 845 |((control & CONTROL_DCD) ? TIOCM_CD : 0); 846 847 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control); 848 849 return result; 850 } 851 852 static void cp210x_break_ctl(struct tty_struct *tty, int break_state) 853 { 854 struct usb_serial_port *port = tty->driver_data; 855 unsigned int state; 856 857 if (break_state == 0) 858 state = BREAK_OFF; 859 else 860 state = BREAK_ON; 861 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 862 state == BREAK_OFF ? "off" : "on"); 863 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); 864 } 865 866 static int cp210x_startup(struct usb_serial *serial) 867 { 868 struct usb_host_interface *cur_altsetting; 869 struct cp210x_serial_private *spriv; 870 871 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 872 if (!spriv) 873 return -ENOMEM; 874 875 cur_altsetting = serial->interface->cur_altsetting; 876 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber; 877 878 usb_set_serial_data(serial, spriv); 879 880 return 0; 881 } 882 883 static void cp210x_release(struct usb_serial *serial) 884 { 885 struct cp210x_serial_private *spriv; 886 887 spriv = usb_get_serial_data(serial); 888 kfree(spriv); 889 } 890 891 module_usb_serial_driver(serial_drivers, id_table); 892 893 MODULE_DESCRIPTION(DRIVER_DESC); 894 MODULE_LICENSE("GPL"); 895