X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=src%2Fcp2101.c;fp=src%2Fcp2101.c;h=53dd422b1f16d1065bb647e0447c9c1237691389;hb=db657625822bb2d96ee0ee8117f3cf81f0d9af08;hp=0000000000000000000000000000000000000000;hpb=820d30d0a79489058bf835d938e628fc7d475748;p=cp210x.git diff --git a/src/cp2101.c b/src/cp2101.c new file mode 100644 index 0000000..53dd422 --- /dev/null +++ b/src/cp2101.c @@ -0,0 +1,1405 @@ +/* + * Silicon Laboratories CP2101/CP2102/CP2103 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 + * + * Port configuration, usb descriptor and gpio management by R. Steve McKown + * (smckown@titaniummirror.com). + * + * Outstanding Issues: + * Buffers are not flushed when the port is opened. + * Multiple calls to write() may fail with "Resource temporarily unavailable" + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#ifndef KERNEL_VERSION +#define KERNEL_VERSION(a,b,c) ((a)*65536 + (b)*256 + (c)) +#endif + +#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0) +#ifdef LINUX26 +#undef LINUX26 +#endif +#define LINUX26 +#endif + +#ifdef LINUX26 + +#include +#include +#define DEV_ERR(dev,format,arg...) dev_err(dev,format, ## arg) +#define USB_KILL_URB usb_kill_urb + +#else /* !LINUX26 */ + +#include +#include "usb-serial.h" + +#ifdef CONFIG_USB_SERIAL_DEBUG + static int debug = 1; +#else + static int debug; +#endif + +#define DEV_ERR(dev,format,arg...) err(format, ## arg) +#define USB_KILL_URB usb_unlink_urb + +#endif /* LINUX26 */ + +/* + * Version Information + * RJM: updated to 0.11 for 2.6.15 and later kernels + */ +#define DRIVER_VERSION "v0.11rsm" +#define DRIVER_DESC "Silicon Labs CP2101/CP2102/CP2103 RS232 serial adaptor driver" + +/* + * Function Prototypes + */ +static int cp2101_open(struct usb_serial_port*, struct file*); +static void cp2101_cleanup(struct usb_serial_port*); +static void cp2101_close(struct usb_serial_port*, struct file*); +static void cp2101_get_termios(struct usb_serial_port*); +static void cp2101_set_termios(struct usb_serial_port*, struct termios*); +static void cp2101_break_ctl(struct usb_serial_port*, int); +static int cp2101_startup (struct usb_serial *); +static void cp2101_shutdown(struct usb_serial*); +static int cp2101_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); +static int cp2101_tiocmget (struct usb_serial_port *, struct file *); +static int cp2101_tiocmset (struct usb_serial_port *, struct file *, unsigned int, unsigned int); + +static int debug; + +static struct usb_device_id id_table [] = { + { USB_DEVICE(0x0FCF, 0x1003) }, /* 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, 0x803B) }, /* Pololu USB-serial converter */ + { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */ + { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */ + { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */ + { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */ + { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */ + { 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, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */ + { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */ + { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */ + { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */ + { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */ + { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */ + { } /* Terminating Entry */ +}; + +MODULE_DEVICE_TABLE (usb, id_table); + +#ifdef LINUX26 +static struct usb_driver cp2101_driver = { +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15) + .owner = THIS_MODULE, +#endif + .name = "CP2101", + .probe = usb_serial_probe, + .disconnect = usb_serial_disconnect, + .id_table = id_table, +}; +#define USB_SUBMIT_URB_ATOMIC(_x_) usb_submit_urb(_x_ , GFP_ATOMIC) +#define USB_SUBMIT_URB_KERNEL(_x_) usb_submit_urb(_x_ , GFP_KERNEL) + +#else /* LINUX26 */ + +#define USB_SUBMIT_URB_ATOMIC(_x_) usb_submit_urb(_x_) +#define USB_SUBMIT_URB_KERNEL(_x_) usb_submit_urb(_x_) +#endif + +#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15) +static struct usb_serial_driver cp2101_device = { + .driver = { + .owner = THIS_MODULE, + .name = "cp2101", + }, +#else +static struct usb_serial_device_type cp2101_device = { + .owner = THIS_MODULE, + .name = "CP2101/CP2102/CP2103 USB to UART Bridge", +#endif + .id_table = id_table, +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) + .num_interrupt_in = 0, + .num_bulk_in = 0, + .num_bulk_out = 0, +#else + .num_interrupt_in = NUM_DONT_CARE, + .num_bulk_in = NUM_DONT_CARE, + .num_bulk_out = NUM_DONT_CARE, +#endif + .num_ports = 1, + .open = cp2101_open, + .close = cp2101_close, + .ioctl = cp2101_ioctl, /* GLA, Added backport */ + .break_ctl = cp2101_break_ctl, + .set_termios = cp2101_set_termios, +#ifdef LINUX26 + .tiocmget = cp2101_tiocmget, + .tiocmset = cp2101_tiocmset, + .attach = cp2101_startup, +#else + .startup = cp2101_startup, +#endif + .shutdown = cp2101_shutdown +}; + +/* Config request types */ +#define REQTYPE_HOST_TO_DEVICE 0x41 +#define REQTYPE_DEVICE_TO_HOST 0xc1 + +/* Config SET requests. To GET, add 1 to the request number */ +#define CP2101_UART 0x00 /* Enable / Disable */ +#define CP2101_BAUDRATE 0x01 /* (BAUD_RATE_GEN_FREQ / baudrate) */ +#define CP2101_BITS 0x03 /* 0x(0)(databits)(parity)(stopbits) */ +#define CP2101_BREAK 0x05 /* On / Off */ +#define CP2101_CONTROL 0x07 /* Flow control line states */ +#define CP2101_MODEMCTL 0x13 /* Modem controls */ +#define CP2101_CONFIG_6 0x19 /* 6 bytes of config data ??? */ + +/* CP2101_UART */ +#define UART_ENABLE 0x0001 +#define UART_DISABLE 0x0000 + +/* CP2101_BAUDRATE */ +#define BAUD_RATE_GEN_FREQ 0x384000 + +/* CP2101_BITS */ +#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 + +/* CP2101_BREAK */ +#define BREAK_ON 0x0000 +#define BREAK_OFF 0x0001 + +/* CP2101_CONTROL */ +#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 + +/* CP2103 ioctls */ +#define IOCTL_GPIOGET 0x8000 /* Get gpio bits */ +#define IOCTL_GPIOSET 0x8001 /* Set gpio bits */ +#define IOCTL_GPIOBIC 0x8002 /* Clear specific gpio bit(s) */ +#define IOCTL_GPIOBIS 0x8003 /* Set specific gpio bit(s) */ + +/* CP210x ioctls principally used during initial device configuration */ +#define IOCTL_DEVICERESET 0x8004 /* Reset the cp210x */ +#define IOCTL_PORTCONFGET 0x8005 /* Get port configuration */ +#define IOCTL_PORTCONFSET 0x8006 /* Set port configuration */ +#define IOCTL_SETVID 0x8007 /* Set vendor id */ +#define IOCTL_SETPID 0x8008 /* Set product id */ +#define IOCTL_SETMFG 0x8009 /* Set manufacturer string */ +#define IOCTL_SETPRODUCT 0x800a /* Set product string */ +#define IOCTL_SETSERIAL 0x800b /* Set serial number string */ +#define IOCTL_SETDEVVER 0x800c /* set device version id */ +/* FIXME: where is IOCTL_SETMFG? */ + +/* CP2103 GPIO */ +#define GPIO_0 0x01 +#define GPIO_1 0x02 +#define GPIO_2 0x04 +#define GPIO_3 0x08 +#define GPIO_MASK (GPIO_0|GPIO_1|GPIO_2|GPIO_3) + +/* GetDeviceVersion() return codes */ +#define CP210x_CP2101_VERSION 0x01 +#define CP210x_CP2102_VERSION 0x02 +#define CP210x_CP2103_VERSION 0x03 + +/* Return codes */ +#define CP210x_SUCCESS 0x00 +#define CP210x_DEVICE_NOT_FOUND 0xFF +#define CP210x_INVALID_HANDLE 0x01 +#define CP210x_INVALID_PARAMETER 0x02 +#define CP210x_DEVICE_IO_FAILED 0x03 +#define CP210x_FUNCTION_NOT_SUPPORTED 0x04 +#define CP210x_GLOBAL_DATA_ERROR 0x05 +#define CP210x_FILE_ERROR 0x06 +#define CP210x_COMMAND_FAILED 0x08 +#define CP210x_INVALID_ACCESS_TYPE 0x09 + +/* USB descriptor sizes */ +#define CP210x_MAX_DEVICE_STRLEN 256 +#define CP210x_MAX_PRODUCT_STRLEN 126 +#define CP210x_MAX_SERIAL_STRLEN 63 +#define CP210x_MAX_MAXPOWER 250 + +/* Used to pass variable sized buffers between user and kernel space (ioctls) */ +typedef struct { + char* buf; + size_t len; +} cp2101_buffer_t; + +/* Port config definitions */ +typedef struct { + uint16_t mode; /* Push-pull = 1, Open-drain = 0 */ + uint16_t lowPower; + uint16_t latch; /* Logic high = 1, Logic low = 0 */ +} cp2101_port_state_t; + +typedef struct { + cp2101_port_state_t reset; + cp2101_port_state_t suspend; + uint8_t enhancedFxn; +} cp2101_port_config_t; + +#define PORT_CONFIG_LEN 13 /* Because sizeof() will pad to full words */ + + +/* + * cp2101_buf_from_user + * Copy a buffer from user space, returning the number of bytes copied + * from ubuf.buf into kbuf. klen is the size of the buffer at kbuf. + */ +size_t copy_buf_from_user(char* kbuf, unsigned long ubuf, size_t klen) +{ + cp2101_buffer_t t; + + if (!kbuf || !ubuf || !klen || copy_from_user(&t, (cp2101_buffer_t *)ubuf, + sizeof(t))) + return 0; + if (t.len < klen) + klen = t.len; + if (!t.buf || !t.len || copy_from_user(kbuf, t.buf, klen)) + return 0; + return klen; +} + +/* + * cp2101_get_config + * Reads from the CP2101 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 cp2101_get_config(struct usb_serial_port* port, u8 request, + unsigned int *data, int size) +{ + struct usb_serial *serial = port->serial; + u32 *buf; + int result, i, length; + + /* Number of integers required to contain the array */ + length = (((size - 1) | 3) + 1)/4; + + buf = kmalloc (length * sizeof(u32), GFP_KERNEL); + memset(buf, 0, length * sizeof(u32)); + + if (!buf) { + DEV_ERR(&port->dev,"%s - out of memory.\n", __FUNCTION__); + return -ENOMEM; + } + + /* For get requests, the request number must be incremented */ + request++; + + /* 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; idev,"%s - Unable to send config request, " + "request=0x%x size=%d result=%d\n", + __FUNCTION__, request, size, result); + return -EPROTO; + } + + return 0; +} + +/* + * cp2101_set_config + * Writes to the CP2101 configuration registers + * Values less than 16 bits wide are sent directly + * 'size' is specified in bytes. + */ +static int cp2101_set_config(struct usb_serial_port* port, u8 request, + unsigned int *data, int size) +{ + struct usb_serial *serial = port->serial; + u32 *buf; + int result, i, length; + + /* Number of integers required to contain the array */ + length = (((size - 1) | 3) + 1)/4; + + buf = kmalloc(length * sizeof(u32), GFP_KERNEL); + if (!buf) { + DEV_ERR(&port->dev,"%s - out of memory.\n", + __FUNCTION__); + 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) { + DEV_ERR(&port->dev,"%s - Unable to send request, " + "request=0x%x size=%d result=%d\n", + __FUNCTION__, request, size, result); + return -EPROTO; + } + + /* Single data value */ + result = usb_control_msg ( + serial->dev, + usb_sndctrlpipe(serial->dev, 0), + request, + REQTYPE_HOST_TO_DEVICE, + data[0], + 0, + NULL, + 0, + 300); + return 0; +} + +/* + * cp2101_set_config_single + * Convenience function for calling cp2101_set_config on single data values + * without requiring an integer pointer + */ +static inline int cp2101_set_config_single(struct usb_serial_port* port, + u8 request, unsigned int data) +{ + return cp2101_set_config(port, request, &data, 2); +} + +/* + * cp2101_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 cp2101_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, "cp2101: control failed cmd rqt %u " + "rq %u len %u ret %d\n", requestype, request, size, ret); + } + return ret; +} + +static int cp2101_reset(struct usb_serial_port *port) +{ + dbg("%s", __FUNCTION__); + +#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... + */ + cp2101_ctlmsg(port, 0xff, 0x40, 0x0008, 0x00, 0, 0); +#else + usb_reset_device(port->serial->dev); +#endif + return 0; +} + +static int cp2101_get_partnum(struct usb_serial_port *port) +{ + static u8 _partnum = 0; + int ret = CP210x_SUCCESS; + if (!_partnum) { + u8 addr = port->serial->dev->actconfig->interface[0]->cur_altsetting-> + endpoint[0].desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; + + if (addr == 0x03 || addr == 0x02) /* The part is a cp2101 */ + _partnum = 0x01; + else if (addr == 0x01) /* Must query part to determine part number */ + ret = (cp2101_ctlmsg(port, 0xff, 0xc0, 0x370b, 0x00, &_partnum, 1) + == 1) ? CP210x_SUCCESS : CP210x_DEVICE_IO_FAILED; + else + ret = CP210x_DEVICE_IO_FAILED; + } + dbg("%s - partnum %u err %d", __FUNCTION__, _partnum, ret); + return (ret == CP210x_SUCCESS) ? _partnum : 0; +} + +inline int cp2101_setu16(struct usb_serial_port *port, int cmd, + unsigned int value) +{ + return cp2101_ctlmsg(port, 0xff, 0x40, 3700 | (cmd & 0xff), value, 0, 0); +} + +/* Populates usbstr with: (len) + (0x03) + unicode(str). Each char in str + * takes up two bytes in unicode format, so the resulting len(usbstr) is + * 2 * len(str) + 2. + * 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; + + /* The usb string format uses a single byte to represent length */ + if (usblen > 256) + usblen = 256; + + p = usbstr + 1; + *p++ = 0x03; + len = 2; + while (srclen && len < usblen) { + *p++ = *src++; + *p++ = 0; + len += 2; + srclen--; + } + *usbstr = (char)len; + } + return len; +} + +/* + * cp2101_setstr + * + * Set a USB string descriptor using proprietary cp210x control messages. + * Return the number of characters actually written. + */ +inline int cp2101_setstr(struct usb_serial_port *port, int cmd, char *usbstr) +{ + unsigned len = usbstr[0]; + int ret = cp2101_ctlmsg(port, 0xff, 0x40, 0x3700 | (cmd & 0xff), 0, usbstr, + len); + dbg("%s - cmd 0x%02x len %d ret %d", __FUNCTION__, cmd, len, ret); + return ret; +} + +static int cp2101_open (struct usb_serial_port *port, struct file *filp) +{ + struct usb_serial *serial = port->serial; + int result; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (cp2101_set_config_single(port, CP2101_UART, UART_ENABLE)) { + DEV_ERR(&port->dev, "%s - Unable to enable UART\n", + __FUNCTION__); + 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_KERNEL(port->read_urb); + if (result) { + DEV_ERR(&port->dev, "%s - failed resubmitting read urb, " + "error %d\n", __FUNCTION__, result); + return result; + } + + /* Configure the termios structure */ + cp2101_get_termios(port); + + /* Set the DTR and RTS pins low */ + cp2101_tiocmset(port, NULL, TIOCM_DTR | TIOCM_RTS, 0); + + return 0; +} + +static void cp2101_cleanup (struct usb_serial_port *port) +{ + struct usb_serial *serial = port->serial; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (serial != NULL && 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); + } + +#ifdef LINUX26 + kfree (usb_get_serial_port_data(port)); + usb_set_serial_port_data(port, NULL); +#else + /*TODOGLA: port.private maybe? + Nobody is using that at the moement in this driver*/ +#endif + +} + +static void cp2101_close (struct usb_serial_port *port, struct file * filp) +{ + dbg("%s - port %d", __FUNCTION__, port->number); + + /* shutdown our urbs */ + dbg("%s - shutting down urbs", __FUNCTION__); + USB_KILL_URB(port->write_urb); + USB_KILL_URB(port->read_urb); + + cp2101_set_config_single(port, CP2101_UART, UART_DISABLE); +} + +/* + * cp2101_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 cp2101_get_termios (struct usb_serial_port *port) +{ + unsigned int cflag, modem_ctl[4]; + int baud; + int bits; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if ((!port->tty) || (!port->tty->termios)) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + cflag = port->tty->termios->c_cflag; + + cp2101_get_config(port, CP2101_BAUDRATE, &baud, 2); + /* Convert to baudrate */ + if (baud) + baud = BAUD_RATE_GEN_FREQ / baud; + + dbg("%s - baud rate = %d", __FUNCTION__, baud); + cflag &= ~CBAUD; + switch (baud) { + /* + * The baud rates which are commented out below + * appear to be supported by the device + * but are non-standard + */ + case 600: cflag |= B600; break; + case 1200: cflag |= B1200; break; + case 1800: cflag |= B1800; break; + case 2400: cflag |= B2400; break; + case 4800: cflag |= B4800; break; + /*case 7200: cflag |= B7200; break;*/ + case 9600: cflag |= B9600; break; + /*case 14400: cflag |= B14400; break;*/ + case 19200: cflag |= B19200; break; + /*case 28800: cflag |= B28800; break;*/ + case 38400: cflag |= B38400; break; + /*case 55854: cflag |= B55054; break;*/ + case 57600: cflag |= B57600; break; + case 115200: cflag |= B115200; break; + /*case 127117: cflag |= B127117; break;*/ + case 230400: cflag |= B230400; break; + case 460800: cflag |= B460800; break; + case 921600: cflag |= B921600; break; + /*case 3686400: cflag |= B3686400; break;*/ + default: + dbg("%s - Baud rate is not supported, " + "using 9600 baud", __FUNCTION__); + cflag |= B9600; + cp2101_set_config_single(port, CP2101_BAUDRATE, + (BAUD_RATE_GEN_FREQ/9600)); + break; + } + + cp2101_get_config(port, CP2101_BITS, &bits, 2); + cflag &= ~CSIZE; + switch(bits & BITS_DATA_MASK) { + case BITS_DATA_5: + dbg("%s - data bits = 5", __FUNCTION__); + cflag |= CS5; + break; + case BITS_DATA_6: + dbg("%s - data bits = 6", __FUNCTION__); + cflag |= CS6; + break; + case BITS_DATA_7: + dbg("%s - data bits = 7", __FUNCTION__); + cflag |= CS7; + break; + case BITS_DATA_8: + dbg("%s - data bits = 8", __FUNCTION__); + cflag |= CS8; + break; + case BITS_DATA_9: + dbg("%s - data bits = 9 (not supported, " + "using 8 data bits)", __FUNCTION__); + cflag |= CS8; + bits &= ~BITS_DATA_MASK; + bits |= BITS_DATA_8; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + default: + dbg("%s - Unknown number of data bits, " + "using 8", __FUNCTION__); + cflag |= CS8; + bits &= ~BITS_DATA_MASK; + bits |= BITS_DATA_8; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + } + + switch(bits & BITS_PARITY_MASK) { + case BITS_PARITY_NONE: + dbg("%s - parity = NONE", __FUNCTION__); + cflag &= ~PARENB; + break; + case BITS_PARITY_ODD: + dbg("%s - parity = ODD", __FUNCTION__); + cflag |= (PARENB|PARODD); + break; + case BITS_PARITY_EVEN: + dbg("%s - parity = EVEN", __FUNCTION__); + cflag &= ~PARODD; + cflag |= PARENB; + break; + case BITS_PARITY_MARK: + dbg("%s - parity = MARK (not supported, " + "disabling parity)", __FUNCTION__); + cflag &= ~PARENB; + bits &= ~BITS_PARITY_MASK; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + case BITS_PARITY_SPACE: + dbg("%s - parity = SPACE (not supported, " + "disabling parity)", __FUNCTION__); + cflag &= ~PARENB; + bits &= ~BITS_PARITY_MASK; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + default: + dbg("%s - Unknown parity mode, " + "disabling parity", __FUNCTION__); + cflag &= ~PARENB; + bits &= ~BITS_PARITY_MASK; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + } + + cflag &= ~CSTOPB; + switch(bits & BITS_STOP_MASK) { + case BITS_STOP_1: + dbg("%s - stop bits = 1", __FUNCTION__); + break; + case BITS_STOP_1_5: + dbg("%s - stop bits = 1.5 (not supported, " + "using 1 stop bit)", __FUNCTION__); + bits &= ~BITS_STOP_MASK; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + case BITS_STOP_2: + dbg("%s - stop bits = 2", __FUNCTION__); + cflag |= CSTOPB; + break; + default: + dbg("%s - Unknown number of stop bits, " + "using 1 stop bit", __FUNCTION__); + bits &= ~BITS_STOP_MASK; + cp2101_set_config(port, CP2101_BITS, &bits, 2); + break; + } + + cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); + if (modem_ctl[0] & 0x0008) { + dbg("%s - flow control = CRTSCTS", __FUNCTION__); + cflag |= CRTSCTS; + } else { + dbg("%s - flow control = NONE", __FUNCTION__); + cflag &= ~CRTSCTS; + } + + port->tty->termios->c_cflag = cflag; +} + +static void cp2101_set_termios (struct usb_serial_port *port, + struct termios *old_termios) +{ + unsigned int cflag, old_cflag=0; + int baud=0, bits; + unsigned int modem_ctl[4]; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if ((!port->tty) || (!port->tty->termios)) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + cflag = port->tty->termios->c_cflag; + + /* Check that they really want us to change something */ + if (old_termios) { + if ((cflag == old_termios->c_cflag) && + (RELEVANT_IFLAG(port->tty->termios->c_iflag) + == RELEVANT_IFLAG(old_termios->c_iflag))) { + dbg("%s - nothing to change...", __FUNCTION__); + return; + } + + old_cflag = old_termios->c_cflag; + } + + /* If the baud rate is to be updated*/ + if ((cflag & CBAUD) != (old_cflag & CBAUD)) { + switch (cflag & CBAUD) { + /* + * The baud rates which are commented out below + * appear to be supported by the device + * but are non-standard + */ + case B0: baud = 0; break; + case B600: baud = 600; break; + case B1200: baud = 1200; break; + case B1800: baud = 1800; break; + case B2400: baud = 2400; break; + case B4800: baud = 4800; break; + /*case B7200: baud = 7200; break;*/ + case B9600: baud = 9600; break; + /*ase B14400: baud = 14400; break;*/ + case B19200: baud = 19200; break; + /*case B28800: baud = 28800; break;*/ + case B38400: baud = 38400; break; + /*case B55854: baud = 55054; break;*/ + case B57600: baud = 57600; break; + case B115200: baud = 115200; break; + /*case B127117: baud = 127117; break;*/ + case B230400: baud = 230400; break; + case B460800: baud = 460800; break; + case B921600: baud = 921600; break; + /*case B3686400: baud = 3686400; break;*/ + default: + DEV_ERR(&port->dev, "cp2101 driver does not " + "support the baudrate requested\n"); + break; + } + + if (baud) { + dbg("%s - Setting baud rate to %d baud", __FUNCTION__, + baud); + if (cp2101_set_config_single(port, CP2101_BAUDRATE, + (BAUD_RATE_GEN_FREQ / baud))) + DEV_ERR(&port->dev, "Baud rate requested not " + "supported by device\n"); + } + } + + /* If the number of data bits is to be updated */ + if ((cflag & CSIZE) != (old_cflag & CSIZE)) { + cp2101_get_config(port, CP2101_BITS, &bits, 2); + bits &= ~BITS_DATA_MASK; + switch (cflag & CSIZE) { + case CS5: + bits |= BITS_DATA_5; + dbg("%s - data bits = 5", __FUNCTION__); + break; + case CS6: + bits |= BITS_DATA_6; + dbg("%s - data bits = 6", __FUNCTION__); + break; + case CS7: + bits |= BITS_DATA_7; + dbg("%s - data bits = 7", __FUNCTION__); + break; + case CS8: + bits |= BITS_DATA_8; + dbg("%s - data bits = 8", __FUNCTION__); + break; + /*case CS9: + bits |= BITS_DATA_9; + dbg("%s - data bits = 9", __FUNCTION__); + break;*/ + default: + DEV_ERR(&port->dev, "cp2101 driver does not " + "support the number of bits requested," + " using 8 bit mode\n"); + bits |= BITS_DATA_8; + break; + } + if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) + DEV_ERR(&port->dev,"Number of data bits requested " + "not supported by device\n"); + } + + if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) { + cp2101_get_config(port, CP2101_BITS, &bits, 2); + bits &= ~BITS_PARITY_MASK; + if (cflag & PARENB) { + if (cflag & PARODD) { + bits |= BITS_PARITY_ODD; + dbg("%s - parity = ODD", __FUNCTION__); + } else { + bits |= BITS_PARITY_EVEN; + dbg("%s - parity = EVEN", __FUNCTION__); + } + } + if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) + DEV_ERR(&port->dev,"Parity mode not supported " + "by device\n"); + } + + if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) { + cp2101_get_config(port, CP2101_BITS, &bits, 2); + bits &= ~BITS_STOP_MASK; + if (cflag & CSTOPB) { + bits |= BITS_STOP_2; + dbg("%s - stop bits = 2", __FUNCTION__); + } else { + bits |= BITS_STOP_1; + dbg("%s - stop bits = 1", __FUNCTION__); + } + if (cp2101_set_config(port, CP2101_BITS, &bits, 2)) + DEV_ERR(&port->dev,"Number of stop bits requested " + "not supported by device\n"); + } + + if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { + cp2101_get_config(port, CP2101_MODEMCTL, modem_ctl, 16); + dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", + __FUNCTION__, 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", __FUNCTION__); + } else { + modem_ctl[0] &= ~0x7B; + modem_ctl[0] |= 0x01; + modem_ctl[1] |= 0x40; + dbg("%s - flow control = NONE", __FUNCTION__); + } + + dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x", + __FUNCTION__, modem_ctl[0], modem_ctl[1], + modem_ctl[2], modem_ctl[3]); + cp2101_set_config(port, CP2101_MODEMCTL, modem_ctl, 16); + } + +} + +static int cp2101_tiocmset (struct usb_serial_port *port, struct file *file, + unsigned int set, unsigned int clear) +{ + int control = 0; + + dbg("%s - port %d", __FUNCTION__, 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", __FUNCTION__, control); + + return cp2101_set_config(port, CP2101_CONTROL, &control, 2); + +} + +static int cp2101_tiocmget (struct usb_serial_port *port, struct file *file) +{ + int control, result; + + dbg("%s - port %d", __FUNCTION__, port->number); + + cp2101_get_config(port, CP2101_CONTROL, &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", __FUNCTION__, control); + + return result; +} + +static void cp2101_break_ctl (struct usb_serial_port *port, int break_state) +{ + int state; + + dbg("%s - port %d", __FUNCTION__, port->number); + if (break_state == 0) + state = BREAK_OFF; + else + state = BREAK_ON; + dbg("%s - turning break %s", __FUNCTION__, + state==BREAK_OFF ? "off" : "on"); + cp2101_set_config(port, CP2101_BREAK, &state, 2); +} + +/* Set all gpio simultaneously */ +static int cp2101_gpioset(struct usb_serial_port *port, u8 gpio) +{ + dbg("%s - port %d, gpio = 0x%.2x", __FUNCTION__, port->number, gpio); + + return cp2101_ctlmsg(port, 0xff, 0x40, 0x37e1, + ((uint16_t)gpio << 8) | GPIO_MASK, 0, 0); +} + +/* Set select gpio bits */ +static int cp2101_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", __FUNCTION__, port->number, gpio); + + /* FIXME: how about REQTYPE_HOST_TO_DEVICE instead of 0x40? */ + return cp2101_ctlmsg(port, 0xff, 0x40, 0x37e1, gpio, 0, 0); +} + +static int cp2101_gpioget(struct usb_serial_port *port, u8* gpio) +{ + int ret; + + dbg("%s - port %d", __FUNCTION__, port->number); + + /* FIXME: how about REQTYPE_DEVICE_TO_HOST instead of 0xc0? */ + ret = cp2101_ctlmsg(port, 0xff, 0xc0, 0x00c2, 0, gpio, 1); + + dbg("%s - gpio = 0x%.2x (%d)", __FUNCTION__, *gpio, ret); + + return (ret == 1) ? 0 : -1; +} + +static int cp2101_portconfset(struct usb_serial_port *port, + cp2101_port_config_t* config) +{ + cp2101_port_config_t lconfig; + int ret; + + dbg("%s", __FUNCTION__); + + memcpy(&lconfig, config, sizeof(lconfig)); + + /* apparently not implemented yet */ + lconfig.suspend.lowPower = 0; + lconfig.reset.lowPower = 0; + + /* Words from cp2103 are MSB */ + lconfig.reset.mode = cpu_to_be16(config->reset.mode); + /* lconfig.reset.lowPower = cpu_to_be16(config->reset.lowPower); */ + lconfig.reset.latch = cpu_to_be16(config->reset.latch); + lconfig.suspend.mode = cpu_to_be16(config->suspend.mode); + /* lconfig.suspend.lowPower = cpu_to_be16(config->suspend.lowPower); */ + lconfig.suspend.latch = cpu_to_be16(config->suspend.latch); + + ret = cp2101_ctlmsg(port, 0xff, 0x40, 0x370c, 0, &lconfig, PORT_CONFIG_LEN); + if (ret == PORT_CONFIG_LEN) + return 0; + else if (ret >= 0) + return -1; + else + return ret; +} + +static int cp2101_portconfget(struct usb_serial_port *port, + cp2101_port_config_t* config) +{ + int ret; + + dbg("%s", __FUNCTION__); + + ret = cp2101_ctlmsg(port, 0xff, 0xc0, 0x370c, 0, config, PORT_CONFIG_LEN); + if (ret == PORT_CONFIG_LEN) { + /* 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; + +} + +static int cp2101_ioctl (struct usb_serial_port *port, struct file *file, + unsigned int cmd, unsigned long arg) +{ + dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); + + switch (cmd) { + +#ifndef LINUX26 + case TIOCMGET: + { + int result = cp2101_tiocmget(port, file); + if (copy_to_user(&arg, &result, sizeof(int))) + return -EFAULT; + return 0; + } + break; + + case TIOCMSET: + case TIOCMBIS: + + case TIOCMBIC: + { + int val = 0; + + if (copy_from_user(&val, &arg, sizeof(int))) + return -EFAULT; + +/* this looks wrong: TIOCMSET isn't going to work right */ + if(cp2101_tiocmset(port, file, cmd==TIOCMBIC?0:val, cmd==TIOCMBIC?val:0)) + return -EFAULT; + return 0; + } + break; +#endif + + case IOCTL_GPIOGET: + if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION) { + u8 gpio = 0; + if (!cp2101_gpioget(port, &gpio) && + !copy_to_user((u8*)arg, &gpio, sizeof(gpio))) + return 0; + } + return -EFAULT; + break; + + case IOCTL_GPIOSET: + if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION && + !cp2101_gpioset(port, arg)) + return 0; + return -EFAULT; + break; + + case IOCTL_GPIOBIC: + case IOCTL_GPIOBIS: + if (cp2101_get_partnum(port) == CP210x_CP2103_VERSION && + !cp2101_gpiosetb(port, (cmd==IOCTL_GPIOBIC) ? 0 : arg, + (cmd==IOCTL_GPIOBIC) ? arg : 0)) + return 0; + return -EFAULT; + break; + + case IOCTL_DEVICERESET: + return cp2101_reset(port); + break; + + case IOCTL_PORTCONFGET: + { + cp2101_port_config_t config; + if (!cp2101_portconfget(port, &config) && + !copy_to_user((cp2101_port_config_t*)arg, &config, + sizeof(config))) + return 0; + } + return -EFAULT; + break; + + case IOCTL_PORTCONFSET: + { + cp2101_port_config_t config; + if (!copy_from_user(&config, (cp2101_port_config_t*)arg, + sizeof(config)) && + !cp2101_portconfset(port, &config)) + return 0; + return -EFAULT; + } + break; + + case IOCTL_SETVID: + { + unsigned int vid; + if (!copy_from_user(&vid, (unsigned int *)arg, + sizeof(unsigned int)) && + !cp2101_setu16(port, 0x01, vid)) + return 0; + return -EFAULT; + } + break; + + case IOCTL_SETPID: + { + unsigned int pid; + if (!copy_from_user(&pid, (unsigned int *)arg, + sizeof(unsigned int)) && + !cp2101_setu16(port, 0x02, pid)) + return 0; + return -EFAULT; + } + break; + + case IOCTL_SETMFG: +#if 0 /* Don't know how to set manufacturer desc yet */ + { + char usbstr[CP210x_MAX_MFG_STRLEN * 2 + 2]; + size_t len = copy_buf_from_user( + usbstr + sizeof(usbstr) - CP210x_MAX_MFG_STRLEN, arg, + CP210x_MAX_MFG_STRLEN); + len = make_usb_string(usbstr, sizeof(usbstr), str, len); + if (len && cp2101_setstr(port, 0x00, usbstr) == len) + return 0; + return -EFAULT; + } +#endif + break; + + case IOCTL_SETPRODUCT: + { + char usbstr[CP210x_MAX_PRODUCT_STRLEN * 2 + 2]; + char* str = usbstr + sizeof(usbstr) - CP210x_MAX_PRODUCT_STRLEN; + size_t len = copy_buf_from_user(str, arg, + CP210x_MAX_PRODUCT_STRLEN); + len = make_usb_string(usbstr, sizeof(usbstr), str, len); + if (len && cp2101_setstr(port, 0x03, usbstr) == len) + return 0; + return -EFAULT; + } + break; + + case IOCTL_SETSERIAL: + { + char usbstr[CP210x_MAX_SERIAL_STRLEN * 2 + 2]; + char* str = usbstr + sizeof(usbstr) - CP210x_MAX_SERIAL_STRLEN; + size_t len = copy_buf_from_user(str, arg, + CP210x_MAX_SERIAL_STRLEN); + len = make_usb_string(usbstr, sizeof(usbstr), str, len); + if (len && cp2101_setstr(port, 0x04, usbstr) == len) + return 0; + return -EFAULT; + } + break; + + case IOCTL_SETDEVVER: + { + unsigned int ver; + if (!copy_from_user(&ver, (unsigned int *)arg, + sizeof(unsigned int)) && + !cp2101_setu16(port, 0x07, ver)) + return 0; + return -EFAULT; + } + break; + + default: + dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); + break; + } + + return -ENOIOCTLCMD; +} + +static int cp2101_startup (struct usb_serial *serial) +{ + /* CP2101 buffers behave strangely unless device is reset */ + usb_reset_device(serial->dev); + return 0; +} + +static void cp2101_shutdown (struct usb_serial *serial) +{ + int i; + + dbg("%s", __FUNCTION__); + + /* Stop reads and writes on all ports */ + for (i=0; i < serial->num_ports; ++i) { +#ifdef LINUX26 + cp2101_cleanup(serial->port[i]); +#else + cp2101_cleanup(&serial->port[i]); +#endif + } +} + +static int __init cp2101_init (void) +{ + int retval; + + retval = usb_serial_register(&cp2101_device); + if (retval) + return retval; /* Failed to register */ + +#ifdef LINUX26 + retval = usb_register(&cp2101_driver); + if (retval) { + /* Failed to register */ + usb_serial_deregister(&cp2101_device); + return retval; + } +#endif + /* Success */ + info(DRIVER_DESC " " DRIVER_VERSION); + return 0; +} + +static void __exit cp2101_exit (void) +{ +#ifdef LINUX26 + usb_deregister (&cp2101_driver); +#endif + usb_serial_deregister (&cp2101_device); +} + +module_init(cp2101_init); +module_exit(cp2101_exit); + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); + +#ifdef LINUX26 +MODULE_VERSION(DRIVER_VERSION); +module_param(debug, bool, S_IRUGO | S_IWUSR); +#else +MODULE_PARM(debug, "i"); +#endif +MODULE_PARM_DESC(debug, "Enable verbose debugging messages"); + +/* +vi:ts=4 +*/ +