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