/* * Silicon Laboratories CP210x USB to RS232 serial adaptor driver * * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * Support to set flow control line levels using TIOCMGET and TIOCMSET * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow * control thanks to Munir Nassar nassarmu@real-time.com * */ #include #include #include #include #include #include #include #include #include #include #include "cp210x.h" /* * Version Information */ #define DRIVER_VERSION "vxxPKGVERxxtmi" #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" /* * Function Prototypes */ static int cp210x_open(struct tty_struct *, struct usb_serial_port *, struct file *); static void cp210x_cleanup(struct usb_serial_port *); static void cp210x_close(struct usb_serial_port *); static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *port); static void cp210x_get_termios_port(struct usb_serial_port *port, unsigned int *cflagp, unsigned int *baudp); static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *, struct ktermios*); static int cp210x_tiocmget(struct tty_struct *, struct file *); static int cp210x_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int); static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *, unsigned int, unsigned int); static void cp210x_break_ctl(struct tty_struct *, int); static int cp210x_startup(struct usb_serial *); static void cp210x_disconnect(struct usb_serial *); static int cp210x_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long); static int debug; static const struct usb_device_id id_table[] = { { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */ { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */ { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */ { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */ { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */ { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */ { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */ { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */ { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */ { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */ { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */ { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */ { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */ { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */ { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */ { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */ { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */ { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */ { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */ { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */ { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */ { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */ { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */ { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */ { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */ { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */ { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */ { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */ { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */ { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */ { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */ { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */ { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */ { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */ { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */ { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */ { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */ { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */ { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */ { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */ { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */ { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */ { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */ { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */ { } /* Terminating Entry */ }; MODULE_DEVICE_TABLE(usb, id_table); static struct usb_driver cp210x_driver = { .name = "cp210x", .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table, .no_dynamic_id = 1, }; static struct usb_serial_driver cp210x_device = { .driver = { .owner = THIS_MODULE, .name = "cp210x", }, .usb_driver = &cp210x_driver, .id_table = id_table, .num_ports = 1, .open = cp210x_open, .close = cp210x_close, .ioctl = cp210x_ioctl, .break_ctl = cp210x_break_ctl, .set_termios = cp210x_set_termios, .tiocmget = cp210x_tiocmget, .tiocmset = cp210x_tiocmset, .attach = cp210x_startup, .disconnect = cp210x_disconnect, }; /* Config request types */ #define REQTYPE_HOST_TO_DEVICE 0x41 #define REQTYPE_DEVICE_TO_HOST 0xc1 /* Config request codes */ #define CP210X_IFC_ENABLE 0x00 #define CP210X_SET_BAUDDIV 0x01 #define CP210X_GET_BAUDDIV 0x02 #define CP210X_SET_LINE_CTL 0x03 #define CP210X_GET_LINE_CTL 0x04 #define CP210X_SET_BREAK 0x05 #define CP210X_IMM_CHAR 0x06 #define CP210X_SET_MHS 0x07 #define CP210X_GET_MDMSTS 0x08 #define CP210X_SET_XON 0x09 #define CP210X_SET_XOFF 0x0A #define CP210X_SET_EVENTMASK 0x0B #define CP210X_GET_EVENTMASK 0x0C #define CP210X_SET_CHAR 0x0D #define CP210X_GET_CHARS 0x0E #define CP210X_GET_PROPS 0x0F #define CP210X_GET_COMM_STATUS 0x10 #define CP210X_RESET 0x11 #define CP210X_PURGE 0x12 #define CP210X_SET_FLOW 0x13 #define CP210X_GET_FLOW 0x14 #define CP210X_EMBED_EVENTS 0x15 #define CP210X_GET_EVENTSTATE 0x16 #define CP210X_SET_CHARS 0x19 /* CP210X_IFC_ENABLE */ #define UART_ENABLE 0x0001 #define UART_DISABLE 0x0000 /* CP210X_(SET|GET)_BAUDDIV */ #define BAUD_RATE_GEN_FREQ 0x384000 /* CP210X_(SET|GET)_LINE_CTL */ #define BITS_DATA_MASK 0X0f00 #define BITS_DATA_5 0X0500 #define BITS_DATA_6 0X0600 #define BITS_DATA_7 0X0700 #define BITS_DATA_8 0X0800 #define BITS_DATA_9 0X0900 #define BITS_PARITY_MASK 0x00f0 #define BITS_PARITY_NONE 0x0000 #define BITS_PARITY_ODD 0x0010 #define BITS_PARITY_EVEN 0x0020 #define BITS_PARITY_MARK 0x0030 #define BITS_PARITY_SPACE 0x0040 #define BITS_STOP_MASK 0x000f #define BITS_STOP_1 0x0000 #define BITS_STOP_1_5 0x0001 #define BITS_STOP_2 0x0002 /* CP210X_SET_BREAK */ #define BREAK_ON 0x0000 #define BREAK_OFF 0x0001 /* CP210X_(SET_MHS|GET_MDMSTS) */ #define CONTROL_DTR 0x0001 #define CONTROL_RTS 0x0002 #define CONTROL_CTS 0x0010 #define CONTROL_DSR 0x0020 #define CONTROL_RING 0x0040 #define CONTROL_DCD 0x0080 #define CONTROL_WRITE_DTR 0x0100 #define CONTROL_WRITE_RTS 0x0200 /* cp210x_get_partnum() return codes */ #define CP210x_PART_UNKNOWN 0x00 #define CP210x_PART_CP2101 0x01 #define CP210x_PART_CP2102 0x02 #define CP210x_PART_CP2103 0x03 /* Helper to make usb string size */ #define USBSTRLEN(x) (x * 2 + 2) /* Populates usbstr with: (len) + (0x03) + unicode(str). Each char in str * takes two bytes in unicode format. * Returns the resulting length of the string in usbstr. * This function can accept overlapping usbstr and str as long as the overlap * does not cause data written to usbstr to overwrite data not yet read from * str. */ static int make_usb_string(char *usbstr, size_t usblen, char *src, size_t srclen) { int len = 0; if (usbstr && usblen >= 2 && src && *src && srclen) { char *p; if (usblen > 255) usblen = 255; p = usbstr + 1; *p++ = 0x03; len = 2; while (srclen && len < usblen) { *p++ = *src++; *p++ = 0; len += 2; srclen--; } *usbstr = (char)len; } return len; } /* * cp210x_usbstr_from_user * Populate kbuf with a usb string derived from a user space variable. klen * is the size of the buffer at kbuf. * Returns the number of bytes used in kbuf. */ static size_t cp210x_usbstr_from_user(char *kbuf, unsigned long ubuf, size_t klen) { struct cp210x_buffer t; char* str; size_t slen; if (!kbuf || !ubuf || !klen) return 0; if (copy_from_user(&t, (struct cp210x_buffer __user *)ubuf, sizeof(t))) return 0; if (!t.buf || !t.len || USBSTRLEN(t.len) > klen) return 0; slen = (klen - 2) / 2; if (t.len < slen) slen = t.len; str = kbuf + klen - slen; if (copy_from_user(str, (u8 __user *)t.buf, slen)) return 0; return make_usb_string(kbuf, klen, str, slen); } /* cp210x_has_setmfg * Returns 1 if the CP210X part includes firmware that allows setting the * USB MFG descriptor, else 0. As of this writing, no CP210X firmware allows * this. SiLabs has suggested this may change in future firmware versions or * parts. */ static inline int cp210x_has_setmfg(void) { return 0; } /* * cp210x_ctlmsg * A generic usb control message interface. * Returns the actual size of the data read or written within the message, 0 * if no data were read or written, or a negative value to indicate an error. */ static int cp210x_ctlmsg(struct usb_serial_port *port, u8 request, u8 requestype, u16 value, u16 index, void *data, u16 size) { struct usb_device *dev = port->serial->dev; u8 *tbuf; int ret; if (!(tbuf = kmalloc(size, GFP_KERNEL))) return -ENOMEM; if (requestype & 0x80) { ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request, requestype, value, index, tbuf, size, 300); if (ret > 0 && size) memcpy(data, tbuf, size); } else { if (size) memcpy(tbuf, data, size); ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, requestype, value, index, tbuf, size, 300); } kfree(tbuf); if (ret < 0 && ret != -EPIPE) { dev_printk(KERN_DEBUG, &dev->dev, "cp210x: control failed cmd rqt %u " "rq %u len %u ret %d\n", requestype, request, size, ret); } return ret; } static int cp210x_reset(struct usb_serial_port *port) { dbg("%s", __func__); #if 1 /* Is this better than usb_device_reset? It may be. Once a client issues * the reset ioctl, it must disconnect and reconnect, since the USB * connections are torn down. We also ignore the error return, since * the part resets and doesn't send one... */ cp210x_ctlmsg(port, 0xff, 0x40, 0x0008, 0x00, NULL, 0); #else usb_reset_device(port->serial->dev); #endif return 0; } static int cp210x_get_partnum(struct usb_serial_port *port) { static u8 _partnum = CP210x_PART_UNKNOWN; if (_partnum == CP210x_PART_UNKNOWN) { u8 addr = port->serial->dev->actconfig->interface[0]-> cur_altsetting->endpoint[0].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; if (addr == 0x03 || addr == 0x02) _partnum = CP210x_PART_CP2101; else if (addr == 0x01) { /* Must query part to determine part number */ if (cp210x_ctlmsg(port, 0xff, 0xc0, 0x370b, 0x00, &_partnum, 1) != 1) _partnum = CP210x_PART_UNKNOWN; } } dbg("%s - partnum %u", __func__, _partnum); return _partnum; } static inline int cp210x_setu16(struct usb_serial_port *port, int cmd, unsigned int value) { return cp210x_ctlmsg(port, 0xff, 0x40, 0x3700 | (cmd & 0xff), value, NULL, 0); } /* * cp210x_setstr * * Set a USB string descriptor using proprietary cp210x control messages. * Return the number of characters actually written. */ static int cp210x_setstr(struct usb_serial_port *port, int cmd, char *usbstr) { unsigned len = usbstr[0]; int ret = cp210x_ctlmsg(port, 0xff, 0x40, 0x3700 | (cmd & 0xff), 0, usbstr, len); dbg("%s - cmd 0x%02x len %d ret %d", __func__, cmd, len, ret); return ret; } /* Set all gpio simultaneously */ static int cp210x_gpioset(struct usb_serial_port *port, u8 gpio) { dbg("%s - port %d, gpio = 0x%.2x", __func__, port->number, gpio); return cp210x_ctlmsg(port, 0xff, 0x40, 0x37e1, ((uint16_t)gpio << 8) | GPIO_MASK, NULL, 0); } /* Set select gpio bits */ static int cp210x_gpiosetb(struct usb_serial_port *port, u8 set, u8 clear) { u16 gpio = 0; /* The bitmask is in the LSB, the values in the MSB */ if (set & GPIO_0) gpio |= (GPIO_0 << 8)|GPIO_0; if (set & GPIO_1) gpio |= (GPIO_1 << 8)|GPIO_1; if (set & GPIO_2) gpio |= (GPIO_2 << 8)|GPIO_2; if (set & GPIO_3) gpio |= (GPIO_3 << 8)|GPIO_3; if (clear & GPIO_0) gpio = (gpio & ~(GPIO_0 << 8))|GPIO_0; if (clear & GPIO_1) gpio = (gpio & ~(GPIO_1 << 8))|GPIO_1; if (clear & GPIO_2) gpio = (gpio & ~(GPIO_2 << 8))|GPIO_2; if (clear & GPIO_3) gpio = (gpio & ~(GPIO_3 << 8))|GPIO_3; dbg("%s - port %d, gpiob = 0x%.4x", __func__, port->number, gpio); /* FIXME: how about REQTYPE_HOST_TO_DEVICE instead of 0x40? */ return cp210x_ctlmsg(port, 0xff, 0x40, 0x37e1, gpio, NULL, 0); } static int cp210x_gpioget(struct usb_serial_port *port, u8 *gpio) { int ret; dbg("%s - port %d", __func__, port->number); /* FIXME: how about REQTYPE_DEVICE_TO_HOST instead of 0xc0? */ ret = cp210x_ctlmsg(port, 0xff, 0xc0, 0x00c2, 0, gpio, 1); dbg("%s - gpio = 0x%.2x (%d)", __func__, *gpio, ret); return (ret == 1) ? 0 : -1; } static int cp210x_portconfset(struct usb_serial_port *port, struct cp210x_port_config *config) { struct cp210x_port_config lconfig; int ret; dbg("%s", __func__); memcpy(&lconfig, config, sizeof(lconfig)); /* Words from cp2103 are MSB */ lconfig.reset.mode = cpu_to_be16(config->reset.mode); lconfig.reset.latch = cpu_to_be16(config->reset.latch); lconfig.suspend.mode = cpu_to_be16(config->suspend.mode); lconfig.suspend.latch = cpu_to_be16(config->suspend.latch); #if 0 /* apparently not implemented by CP210X firmware */ lconfig.reset.lowPower = cpu_to_be16(config->reset.lowPower); lconfig.suspend.lowPower = cpu_to_be16(config->suspend.lowPower); #else lconfig.suspend.lowPower = 0; lconfig.reset.lowPower = 0; #endif ret = cp210x_ctlmsg(port, 0xff, 0x40, 0x370c, 0, &lconfig, sizeof(struct cp210x_port_config)); if (ret == sizeof(struct cp210x_port_config)) return 0; else if (ret >= 0) return -1; else return ret; } static int cp210x_portconfget(struct usb_serial_port *port, struct cp210x_port_config *config) { int ret; dbg("%s", __func__); ret = cp210x_ctlmsg(port, 0xff, 0xc0, 0x370c, 0, config, sizeof(struct cp210x_port_config)); if (ret == sizeof(struct cp210x_port_config)) { /* Words from cp2103 are MSB */ config->reset.mode = be16_to_cpu(config->reset.mode); config->reset.lowPower = be16_to_cpu(config->reset.lowPower); config->reset.latch = be16_to_cpu(config->reset.latch); config->suspend.mode = be16_to_cpu(config->suspend.mode); config->suspend.lowPower = be16_to_cpu(config->suspend.lowPower); config->suspend.latch = be16_to_cpu(config->suspend.latch); /* apparently not implemented yet */ config->reset.lowPower = 0; config->suspend.lowPower = 0; return 0; } else if (ret >= 0) return -1; else return ret; } /* * cp210x_get_config * Reads from the CP210x configuration registers * 'size' is specified in bytes. * 'data' is a pointer to a pre-allocated array of integers large * enough to hold 'size' bytes (with 4 bytes to each integer) */ static int cp210x_get_config(struct usb_serial_port *port, u8 request, unsigned int *data, int size) { struct usb_serial *serial = port->serial; __le32 *buf; int result, i, length; /* Number of integers required to contain the array */ length = (((size - 1) | 3) + 1)/4; buf = kcalloc(length, sizeof(__le32), GFP_KERNEL); if (!buf) { dev_err(&port->dev, "%s - out of memory.\n", __func__); return -ENOMEM; } /* Issue the request, attempting to read 'size' bytes */ result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), request, REQTYPE_DEVICE_TO_HOST, 0x0000, 0, buf, size, 300); /* Convert data into an array of integers */ for (i = 0; i < length; i++) data[i] = le32_to_cpu(buf[i]); kfree(buf); if (result != size) { dbg("%s - Unable to send config request, " "request=0x%x size=%d result=%d\n", __func__, request, size, result); return -EPROTO; } return 0; } /* * cp210x_set_config * Writes to the CP210x configuration registers * Values less than 16 bits wide are sent directly * 'size' is specified in bytes. */ static int cp210x_set_config(struct usb_serial_port *port, u8 request, unsigned int *data, int size) { struct usb_serial *serial = port->serial; __le32 *buf; int result, i, length; /* Number of integers required to contain the array */ length = (((size - 1) | 3) + 1)/4; buf = kmalloc(length * sizeof(__le32), GFP_KERNEL); if (!buf) { dev_err(&port->dev, "%s - out of memory.\n", __func__); return -ENOMEM; } /* Array of integers into bytes */ for (i = 0; i < length; i++) buf[i] = cpu_to_le32(data[i]); if (size > 2) { result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), request, REQTYPE_HOST_TO_DEVICE, 0x0000, 0, buf, size, 300); } else { result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), request, REQTYPE_HOST_TO_DEVICE, data[0], 0, NULL, 0, 300); } kfree(buf); if ((size > 2 && result != size) || result < 0) { dbg("%s - Unable to send request, " "request=0x%x size=%d result=%d\n", __func__, request, size, result); return -EPROTO; } return 0; } /* * cp210x_set_config_single * Convenience function for calling cp210x_set_config on single data values * without requiring an integer pointer */ static inline int cp210x_set_config_single(struct usb_serial_port *port, u8 request, unsigned int data) { return cp210x_set_config(port, request, &data, 2); } /* * cp210x_quantise_baudrate * Quantises the baud rate as per AN205 Table 1 */ static unsigned int cp210x_quantise_baudrate(unsigned int baud) { if (baud <= 56) baud = 0; else if (baud <= 300) baud = 300; else if (baud <= 600) baud = 600; else if (baud <= 1200) baud = 1200; else if (baud <= 1800) baud = 1800; else if (baud <= 2400) baud = 2400; else if (baud <= 4000) baud = 4000; else if (baud <= 4803) baud = 4800; else if (baud <= 7207) baud = 7200; else if (baud <= 9612) baud = 9600; else if (baud <= 14428) baud = 14400; else if (baud <= 16062) baud = 16000; else if (baud <= 19250) baud = 19200; else if (baud <= 28912) baud = 28800; else if (baud <= 38601) baud = 38400; else if (baud <= 51558) baud = 51200; else if (baud <= 56280) baud = 56000; else if (baud <= 58053) baud = 57600; else if (baud <= 64111) baud = 64000; else if (baud <= 77608) baud = 76800; else if (baud <= 117028) baud = 115200; else if (baud <= 129347) baud = 128000; else if (baud <= 156868) baud = 153600; else if (baud <= 237832) baud = 230400; else if (baud <= 254234) baud = 250000; else if (baud <= 273066) baud = 256000; else if (baud <= 491520) baud = 460800; else if (baud <= 567138) baud = 500000; else if (baud <= 670254) baud = 576000; else if (baud <= 1053257) baud = 921600; else if (baud <= 1474560) baud = 1228800; else if (baud <= 2457600) baud = 1843200; else baud = 3686400; return baud; } static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp) { struct usb_serial *serial = port->serial; int result; dbg("%s - port %d", __func__, port->number); if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) { dev_err(&port->dev, "%s - Unable to enable UART\n", __func__); return -EPROTO; } /* Start reading from the device */ usb_fill_bulk_urb(port->read_urb, serial->dev, usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress), port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length, serial->type->read_bulk_callback, port); result = usb_submit_urb(port->read_urb, GFP_KERNEL); if (result) { dev_err(&port->dev, "%s - failed resubmitting read urb, " "error %d\n", __func__, result); return result; } /* Configure the termios structure */ cp210x_get_termios(tty, port); /* Set the DTR and RTS pins low */ cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data : port, NULL, TIOCM_DTR | TIOCM_RTS, 0); return 0; } static void cp210x_cleanup(struct usb_serial_port *port) { struct usb_serial *serial = port->serial; dbg("%s - port %d", __func__, port->number); if (serial->dev) { /* shutdown any bulk reads that might be going on */ if (serial->num_bulk_out) usb_kill_urb(port->write_urb); if (serial->num_bulk_in) usb_kill_urb(port->read_urb); } } static void cp210x_close(struct usb_serial_port *port) { dbg("%s - port %d", __func__, port->number); /* shutdown our urbs */ dbg("%s - shutting down urbs", __func__); usb_kill_urb(port->write_urb); usb_kill_urb(port->read_urb); mutex_lock(&port->serial->disc_mutex); if (!port->serial->disconnected) cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE); mutex_unlock(&port->serial->disc_mutex); } static int cp210x_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct usb_serial_port *port = tty->driver_data; dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); switch (cmd) { case TIOCMGET: { int result = cp210x_tiocmget(tty, file); if (copy_to_user((int __user *)&arg, &result, sizeof(int))) return -EFAULT; return 0; } break; case TIOCMSET: case TIOCMBIS: case TIOCMBIC: { int val = 0; if (copy_from_user(&val, (int __user *)&arg, sizeof(int))) return -EFAULT; /* this looks wrong: TIOCMSET isn't going to work right */ if (cp210x_tiocmset(tty, file, cmd==TIOCMBIC ? 0 : val, cmd==TIOCMBIC ? val : 0)) return -EFAULT; return 0; } break; case CP210x_IOCTL_GPIOGET: if (cp210x_get_partnum(port) == CP210x_PART_CP2103) { u8 gpio = 0; if (!cp210x_gpioget(port, &gpio) && !copy_to_user( (u8 __user *)arg, &gpio, sizeof(gpio))) return 0; } return -EFAULT; break; case CP210x_IOCTL_GPIOSET: if (cp210x_get_partnum(port) == CP210x_PART_CP2103 && !cp210x_gpioset(port, arg)) return 0; return -EFAULT; break; case CP210x_IOCTL_GPIOBIC: case CP210x_IOCTL_GPIOBIS: if (cp210x_get_partnum(port) == CP210x_PART_CP2103 && !cp210x_gpiosetb(port, (cmd==CP210x_IOCTL_GPIOBIC) ? 0 : arg, (cmd==CP210x_IOCTL_GPIOBIC) ? arg : 0)) return 0; return -EFAULT; break; case CP210x_IOCTL_DEVICERESET: return cp210x_reset(port); break; case CP210x_IOCTL_PORTCONFGET: { struct cp210x_port_config config; if (!cp210x_portconfget(port, &config) && !copy_to_user( (struct cp210x_port_config __user *)arg, &config, sizeof(config))) return 0; } return -EFAULT; break; case CP210x_IOCTL_PORTCONFSET: { struct cp210x_port_config config; if (!copy_from_user(&config, (struct cp210x_port_config __user *)arg, sizeof(config)) && !cp210x_portconfset(port, &config)) return 0; return -EFAULT; } break; case CP210x_IOCTL_SETVID: { unsigned int vid; if (!copy_from_user(&vid, (unsigned int __user *)arg, sizeof(unsigned int)) && !cp210x_setu16(port, 0x01, vid)) return 0; return -EFAULT; } break; case CP210x_IOCTL_SETPID: { unsigned int pid; if (!copy_from_user(&pid, (unsigned int __user *)arg, sizeof(unsigned int)) && !cp210x_setu16(port, 0x02, pid)) return 0; return -EFAULT; } break; case CP210x_IOCTL_SETMFG: if (cp210x_has_setmfg()) { char usbstr[USBSTRLEN(CP210x_MAX_MFG_STRLEN)]; size_t len = cp210x_usbstr_from_user(usbstr, arg, sizeof(usbstr)); if (len && cp210x_setstr(port, 0x00, usbstr) == len) return 0; } return -EFAULT; break; case CP210x_IOCTL_SETPRODUCT: { char usbstr[USBSTRLEN(CP210x_MAX_PRODUCT_STRLEN)]; size_t len = cp210x_usbstr_from_user(usbstr, arg, sizeof(usbstr)); if (len && cp210x_setstr(port, 0x03, usbstr) == len) return 0; return -EFAULT; } break; case CP210x_IOCTL_SETSERIAL: { char usbstr[USBSTRLEN(CP210x_MAX_SERIAL_STRLEN)]; size_t len = cp210x_usbstr_from_user(usbstr, arg, sizeof(usbstr)); if (len && cp210x_setstr(port, 0x04, usbstr) == len) return 0; return -EFAULT; } break; case CP210x_IOCTL_SETDEVVER: { unsigned int ver; if (!copy_from_user(&ver, (unsigned int __user *)arg, sizeof(unsigned int)) && !cp210x_setu16(port, 0x07, ver)) return 0; return -EFAULT; } break; default: dbg("%s not supported = 0x%04x", __func__, cmd); break; } return -ENOIOCTLCMD; } /* * cp210x_get_termios * Reads the baud rate, data bits, parity, stop bits and flow control mode * from the device, corrects any unsupported values, and configures the * termios structure to reflect the state of the device */ static void cp210x_get_termios(struct tty_struct *tty, struct usb_serial_port *port) { unsigned int baud; if (tty) { cp210x_get_termios_port(tty->driver_data, &tty->termios->c_cflag, &baud); tty_encode_baud_rate(tty, baud, baud); } else { unsigned int cflag; cflag = 0; cp210x_get_termios_port(port, &cflag, &baud); } } /* * cp210x_get_termios_port * This is the heart of cp210x_get_termios which always uses a &usb_serial_port. */ static void cp210x_get_termios_port(struct usb_serial_port *port, unsigned int *cflagp, unsigned int *baudp) { unsigned int cflag, modem_ctl[4]; unsigned int baud; unsigned int bits; dbg("%s - port %d", __func__, port->number); cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2); /* Convert to baudrate */ if (baud) baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud); dbg("%s - baud rate = %d", __func__, baud); *baudp = baud; cflag = *cflagp; cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); cflag &= ~CSIZE; switch (bits & BITS_DATA_MASK) { case BITS_DATA_5: dbg("%s - data bits = 5", __func__); cflag |= CS5; break; case BITS_DATA_6: dbg("%s - data bits = 6", __func__); cflag |= CS6; break; case BITS_DATA_7: dbg("%s - data bits = 7", __func__); cflag |= CS7; break; case BITS_DATA_8: dbg("%s - data bits = 8", __func__); cflag |= CS8; break; case BITS_DATA_9: dbg("%s - data bits = 9 (not supported, using 8 data bits)", __func__); cflag |= CS8; bits &= ~BITS_DATA_MASK; bits |= BITS_DATA_8; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; default: dbg("%s - Unknown number of data bits, using 8", __func__); cflag |= CS8; bits &= ~BITS_DATA_MASK; bits |= BITS_DATA_8; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; } switch (bits & BITS_PARITY_MASK) { case BITS_PARITY_NONE: dbg("%s - parity = NONE", __func__); cflag &= ~PARENB; break; case BITS_PARITY_ODD: dbg("%s - parity = ODD", __func__); cflag |= (PARENB|PARODD); break; case BITS_PARITY_EVEN: dbg("%s - parity = EVEN", __func__); cflag &= ~PARODD; cflag |= PARENB; break; case BITS_PARITY_MARK: dbg("%s - parity = MARK (not supported, disabling parity)", __func__); cflag &= ~PARENB; bits &= ~BITS_PARITY_MASK; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; case BITS_PARITY_SPACE: dbg("%s - parity = SPACE (not supported, disabling parity)", __func__); cflag &= ~PARENB; bits &= ~BITS_PARITY_MASK; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; default: dbg("%s - Unknown parity mode, disabling parity", __func__); cflag &= ~PARENB; bits &= ~BITS_PARITY_MASK; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; } cflag &= ~CSTOPB; switch (bits & BITS_STOP_MASK) { case BITS_STOP_1: dbg("%s - stop bits = 1", __func__); break; case BITS_STOP_1_5: dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)", __func__); bits &= ~BITS_STOP_MASK; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; case BITS_STOP_2: dbg("%s - stop bits = 2", __func__); cflag |= CSTOPB; break; default: dbg("%s - Unknown number of stop bits, using 1 stop bit", __func__); bits &= ~BITS_STOP_MASK; cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2); break; } cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); if (modem_ctl[0] & 0x0008) { dbg("%s - flow control = CRTSCTS", __func__); cflag |= CRTSCTS; } else { dbg("%s - flow control = NONE", __func__); cflag &= ~CRTSCTS; } *cflagp = cflag; } static void cp210x_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { unsigned int cflag, old_cflag; unsigned int baud = 0, bits; unsigned int modem_ctl[4]; dbg("%s - port %d", __func__, port->number); if (!tty) return; tty->termios->c_cflag &= ~CMSPAR; cflag = tty->termios->c_cflag; old_cflag = old_termios->c_cflag; baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty)); /* If the baud rate is to be updated*/ if (baud != tty_termios_baud_rate(old_termios) && baud != 0) { dbg("%s - Setting baud rate to %d baud", __func__, baud); if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV, ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) { dbg("Baud rate requested not supported by device"); baud = tty_termios_baud_rate(old_termios); } } /* Report back the resulting baud rate */ tty_encode_baud_rate(tty, baud, baud); /* If the number of data bits is to be updated */ if ((cflag & CSIZE) != (old_cflag & CSIZE)) { cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); bits &= ~BITS_DATA_MASK; switch (cflag & CSIZE) { case CS5: bits |= BITS_DATA_5; dbg("%s - data bits = 5", __func__); break; case CS6: bits |= BITS_DATA_6; dbg("%s - data bits = 6", __func__); break; case CS7: bits |= BITS_DATA_7; dbg("%s - data bits = 7", __func__); break; case CS8: bits |= BITS_DATA_8; dbg("%s - data bits = 8", __func__); break; /*case CS9: bits |= BITS_DATA_9; dbg("%s - data bits = 9", __func__); break;*/ default: dbg("cp210x driver does not " "support the number of bits requested," " using 8 bit mode\n"); bits |= BITS_DATA_8; break; } if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) dbg("Number of data bits requested " "not supported by device\n"); } if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); bits &= ~BITS_PARITY_MASK; if (cflag & PARENB) { if (cflag & PARODD) { bits |= BITS_PARITY_ODD; dbg("%s - parity = ODD", __func__); } else { bits |= BITS_PARITY_EVEN; dbg("%s - parity = EVEN", __func__); } } if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) dbg("Parity mode not supported " "by device\n"); } if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2); bits &= ~BITS_STOP_MASK; if (cflag & CSTOPB) { bits |= BITS_STOP_2; dbg("%s - stop bits = 2", __func__); } else { bits |= BITS_STOP_1; dbg("%s - stop bits = 1", __func__); } if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2)) dbg("Number of stop bits requested " "not supported by device\n"); } if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16); dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", __func__, modem_ctl[0], modem_ctl[1], modem_ctl[2], modem_ctl[3]); if (cflag & CRTSCTS) { modem_ctl[0] &= ~0x7B; modem_ctl[0] |= 0x09; modem_ctl[1] = 0x80; dbg("%s - flow control = CRTSCTS", __func__); } else { modem_ctl[0] &= ~0x7B; modem_ctl[0] |= 0x01; modem_ctl[1] |= 0x40; dbg("%s - flow control = NONE", __func__); } dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", __func__, modem_ctl[0], modem_ctl[1], modem_ctl[2], modem_ctl[3]); cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16); } } static int cp210x_tiocmset (struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; return cp210x_tiocmset_port(port, file, set, clear); } static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear) { unsigned int control = 0; dbg("%s - port %d", __func__, port->number); if (set & TIOCM_RTS) { control |= CONTROL_RTS; control |= CONTROL_WRITE_RTS; } if (set & TIOCM_DTR) { control |= CONTROL_DTR; control |= CONTROL_WRITE_DTR; } if (clear & TIOCM_RTS) { control &= ~CONTROL_RTS; control |= CONTROL_WRITE_RTS; } if (clear & TIOCM_DTR) { control &= ~CONTROL_DTR; control |= CONTROL_WRITE_DTR; } dbg("%s - control = 0x%.4x", __func__, control); return cp210x_set_config(port, CP210X_SET_MHS, &control, 2); } static int cp210x_tiocmget (struct tty_struct *tty, struct file *file) { struct usb_serial_port *port = tty->driver_data; unsigned int control; int result; dbg("%s - port %d", __func__, port->number); cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1); result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) |((control & CONTROL_RTS) ? TIOCM_RTS : 0) |((control & CONTROL_CTS) ? TIOCM_CTS : 0) |((control & CONTROL_DSR) ? TIOCM_DSR : 0) |((control & CONTROL_RING)? TIOCM_RI : 0) |((control & CONTROL_DCD) ? TIOCM_CD : 0); dbg("%s - control = 0x%.2x", __func__, control); return result; } static void cp210x_break_ctl (struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; unsigned int state; dbg("%s - port %d", __func__, port->number); if (break_state == 0) state = BREAK_OFF; else state = BREAK_ON; dbg("%s - turning break %s", __func__, state == BREAK_OFF ? "off" : "on"); cp210x_set_config(port, CP210X_SET_BREAK, &state, 2); } static int cp210x_startup(struct usb_serial *serial) { /* cp210x buffers behave strangely unless device is reset */ usb_reset_device(serial->dev); return 0; } static void cp210x_disconnect(struct usb_serial *serial) { int i; dbg("%s", __func__); /* Stop reads and writes on all ports */ for (i = 0; i < serial->num_ports; ++i) cp210x_cleanup(serial->port[i]); } static int __init cp210x_init(void) { int retval; retval = usb_serial_register(&cp210x_device); if (retval) return retval; /* Failed to register */ retval = usb_register(&cp210x_driver); if (retval) { /* Failed to register */ usb_serial_deregister(&cp210x_device); return retval; } /* Success */ printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" DRIVER_DESC "\n"); return 0; } static void __exit cp210x_exit(void) { usb_deregister(&cp210x_driver); usb_serial_deregister(&cp210x_device); } module_init(cp210x_init); module_exit(cp210x_exit); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_VERSION(DRIVER_VERSION); MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Enable verbose debugging messages");