From 3d6175b79d72cadeac5b25eae81d1cb77f6c8f39 Mon Sep 17 00:00:00 2001 From: "R. Steve McKown" Date: Thu, 8 Sep 2011 09:25:02 -0600 Subject: [PATCH] Support for natty There's no change, but to ensure that the same module code used in Maverick is used in natty. --- src/cp210x.c.natty | 1309 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1309 insertions(+) create mode 100644 src/cp210x.c.natty diff --git a/src/cp210x.c.natty b/src/cp210x.c.natty new file mode 100644 index 0000000..d88d980 --- /dev/null +++ b/src/cp210x.c.natty @@ -0,0 +1,1309 @@ +/* + * 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 "vxxDEBVERxx" +#define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver" + +/* + * Function Prototypes + */ +static int cp210x_open(struct tty_struct *tty, 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 int cp210x_ioctl(struct tty_struct *, struct file *, + unsigned int, unsigned long); +static void cp210x_dtr_rts(struct usb_serial_port *p, int on); +static int cp210x_carrier_raised(struct usb_serial_port *p); + +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(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */ + { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */ + { 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, 0x8044) }, /* Cygnal Debug Adapter */ + { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */ + { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */ + { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */ + { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ + { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */ + { 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, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */ + { 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, 0x818B) }, /* AVIT Research USB to TTL */ + { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */ + { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */ + { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */ + { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */ + { 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, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */ + { 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(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */ + { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */ + { 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, + .bulk_in_size = 256, + .bulk_out_size = 256, + .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, + .dtr_rts = cp210x_dtr_rts, + .carrier_raised = cp210x_carrier_raised +}; + +/* 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 + +/* Taken from drivers/usb/gadget/usbstring.c */ +static int utf8_to_utf16le(const char *s, __le16 *cp, unsigned len) +{ + int count = 0; + u8 c; + u16 uchar; + + /* this insists on correct encodings, though not minimal ones. + * BUT it currently rejects legit 4-byte UTF-8 code points, + * which need surrogate pairs. (Unicode 3.1 can use them.) + */ + while (len != 0 && (c = (u8) *s++) != 0) { + if (unlikely(c & 0x80)) { + // 2-byte sequence: + // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx + if ((c & 0xe0) == 0xc0) { + uchar = (c & 0x1f) << 6; + + c = (u8) *s++; + if ((c & 0xc0) != 0x80) + goto fail; + c &= 0x3f; + uchar |= c; + + // 3-byte sequence (most CJKV characters): + // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx + } else if ((c & 0xf0) == 0xe0) { + uchar = (c & 0x0f) << 12; + + c = (u8) *s++; + if ((c & 0xc0) != 0x80) + goto fail; + c &= 0x3f; + uchar |= c << 6; + + c = (u8) *s++; + if ((c & 0xc0) != 0x80) + goto fail; + c &= 0x3f; + uchar |= c; + + /* no bogus surrogates */ + if (0xd800 <= uchar && uchar <= 0xdfff) + goto fail; + + // 4-byte sequence (surrogate pairs, currently rare): + // 11101110wwwwzzzzyy + 110111yyyyxxxxxx + // = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx + // (uuuuu = wwww + 1) + // FIXME accept the surrogate code points (only) + + } else + goto fail; + } else + uchar = c; + *cp++ = uchar; + count++; + len--; + } + return count; +fail: + return -1; +} + + +/* + * make_usb_string + * Populates usbstr with: (len) + (USB_DT_STRING) + unicode(str). Each char in + * usbstr consumes two bytes in unicode (__le16) format. + * Returns the resulting length of usbstr in bytes. + * 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(__le16* usbstr, size_t usblen, const char *src, + size_t srclen) +{ + int len; + + /* string descriptors have length, type, then UTF16-LE text */ + if (usblen > 254) + usblen = 254; + len = min(usblen / 2 - 1, srclen); + len = utf8_to_utf16le(src, usbstr + 1, len); + if (len >= 0) { + len = (len + 1) * 2; + ((u8 *)usbstr)[0] = len; + ((u8 *)usbstr)[1] = USB_DT_STRING; + } + 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(__le16 *kbuf, + struct cp210x_buffer __user *ubuf, size_t klen) +{ + struct cp210x_buffer t; + char *str; + size_t slen; + + if (copy_from_user(&t, ubuf, sizeof(t))) + return -EINVAL; + slen = klen / 2 - 1; + if (!t.buf || !t.len || t.len > slen) + return -EINVAL; + if (t.len < slen) + slen = t.len; + str = (char *)kbuf + klen - slen; + if (copy_from_user(str, (__u8 __user *)t.buf, slen)) + return -EINVAL; + return make_usb_string(kbuf, klen, str, slen); +} + +/* + * 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; + + tbuf = kmalloc(size, GFP_KERNEL); + if (!tbuf) + return -ENOMEM; + if (requestype & USB_DIR_IN) { + 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: ctl 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__); + + /* Instructing the CP210X to reset seems to work more reliably than + * calling usb_reset_device(). + */ + cp210x_ctlmsg(port, 0xff, USB_TYPE_VENDOR, + 0x0008, 0x00, NULL, 0); + 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, + USB_DIR_IN|USB_TYPE_VENDOR, + 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, USB_TYPE_VENDOR, + 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, __le16 *usbstr) +{ + int len = ((u8 *)usbstr)[0]; + int ret = cp210x_ctlmsg(port, 0xff, USB_TYPE_VENDOR, + 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, USB_TYPE_VENDOR, + 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); + + return cp210x_ctlmsg(port, 0xff, USB_TYPE_VENDOR, + 0x37e1, gpio, NULL, 0); +} + +static int cp210x_gpioget(struct usb_serial_port *port, u8 *gpio) +{ + int ret; + + dbg("%s - port %d", __func__, port->number); + + ret = cp210x_ctlmsg(port, 0xff, USB_DIR_IN|USB_TYPE_VENDOR, + 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 cp210x 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); + /* apparently not implemented by CP210X firmware */ + lconfig.suspend.lowPower = 0; + lconfig.reset.lowPower = 0; + + ret = cp210x_ctlmsg(port, 0xff, USB_TYPE_VENDOR, 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, USB_DIR_IN|USB_TYPE_VENDOR, + 0x370c, 0, config, sizeof(struct cp210x_port_config)); + if (ret == sizeof(struct cp210x_port_config)) { + /* Words from cp210x 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, + USB_DIR_IN|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, + 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, + USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 0x0000, + 0, buf, size, 300); + } else { + result = usb_control_msg(serial->dev, + usb_sndctrlpipe(serial->dev, 0), request, + USB_TYPE_VENDOR|USB_RECIP_INTERFACE, 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) +{ + 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; + } + + result = usb_serial_generic_open(tty, port); + if (result) + return result; + + /* Configure the termios structure */ + cp210x_get_termios(tty, port); + return 0; +} + +static void cp210x_close(struct usb_serial_port *port) +{ + dbg("%s - port %d", __func__, port->number); + + usb_serial_generic_close(port); + + 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_SETPRODUCT: + { + __le16 usbstr[CP210x_MAX_PRODUCT_STRLEN + 1]; + size_t len = cp210x_usbstr_from_user(usbstr, + (struct cp210x_buffer __user *)arg, + sizeof(usbstr)); + if (len > 0 && cp210x_setstr(port, 0x03, usbstr) == len) + return 0; + return -EFAULT; + } + break; + + case CP210x_IOCTL_SETSERIAL: + { + __le16 usbstr[CP210x_MAX_SERIAL_STRLEN + 1]; + size_t len = cp210x_usbstr_from_user(usbstr, + (struct cp210x_buffer __user *)arg, + sizeof(usbstr)); + if (len > 0 && 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 void cp210x_dtr_rts(struct usb_serial_port *p, int on) +{ + if (on) + cp210x_tiocmset_port(p, NULL, TIOCM_DTR|TIOCM_RTS, 0); + else + cp210x_tiocmset_port(p, NULL, 0, TIOCM_DTR|TIOCM_RTS); +} + +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 int cp210x_carrier_raised(struct usb_serial_port *p) +{ + unsigned int control; + cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1); + if (control & CONTROL_DCD) + return 1; + return 0; +} + +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 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"); -- 2.39.2