diff options
Diffstat (limited to 'drivers/usb/serial/cypress_m8.c')
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 1538 |
1 files changed, 1538 insertions, 0 deletions
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c new file mode 100644 index 00000000000..db8f472d9e3 --- /dev/null +++ b/drivers/usb/serial/cypress_m8.c @@ -0,0 +1,1538 @@ +/* + * USB Cypress M8 driver + * + * Copyright (C) 2004 + * Lonnie Mendez (dignome@gmail.com) + * Copyright (C) 2003,2004 + * Neil Whelchel (koyama@firstlight.net) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * See Documentation/usb/usb-serial.txt for more information on using this driver + * + * See http://geocities.com/i0xox0i for information on this driver and the + * earthmate usb device. + * + * + * Lonnie Mendez <dignome@gmail.com> + * 12-15-2004 + * Incorporated write buffering from pl2303 driver. Fixed bug with line + * handling so both lines are raised in cypress_open. (was dropping rts) + * Various code cleanups made as well along with other misc bug fixes. + * + * Lonnie Mendez <dignome@gmail.com> + * 04-10-2004 + * Driver modified to support dynamic line settings. Various improvments + * and features. + * + * Neil Whelchel + * 10-2003 + * Driver first released. + * + * + * Long Term TODO: + * Improve transfer speeds - both read/write are somewhat slow + * at this point. + * Improve debugging. Show modem line status with debug output and + * implement filtering for certain data as a module parameter. + */ + +/* Thanks to Neil Whelchel for writing the first cypress m8 implementation for linux. */ +/* Thanks to cypress for providing references for the hid reports. */ +/* Thanks to Jiang Zhang for providing links and for general help. */ +/* Code originates and was built up from ftdi_sio, belkin, pl2303 and others. */ + + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/spinlock.h> +#include <linux/usb.h> +#include <linux/serial.h> +#include <linux/delay.h> +#include <asm/uaccess.h> + +#include "usb-serial.h" +#include "cypress_m8.h" + + +#ifdef CONFIG_USB_SERIAL_DEBUG + static int debug = 1; +#else + static int debug; +#endif +static int stats; + +/* + * Version Information + */ +#define DRIVER_VERSION "v1.08" +#define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>" +#define DRIVER_DESC "Cypress USB to Serial Driver" + +/* write buffer size defines */ +#define CYPRESS_BUF_SIZE 1024 +#define CYPRESS_CLOSING_WAIT (30*HZ) + +static struct usb_device_id id_table_earthmate [] = { + { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, + { } /* Terminating entry */ +}; + +static struct usb_device_id id_table_cyphidcomrs232 [] = { + { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, + { } /* Terminating entry */ +}; + +static struct usb_device_id id_table_combined [] = { + { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) }, + { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE (usb, id_table_combined); + +static struct usb_driver cypress_driver = { + .name = "cypress", + .probe = usb_serial_probe, + .disconnect = usb_serial_disconnect, + .id_table = id_table_combined, +}; + +struct cypress_private { + spinlock_t lock; /* private lock */ + int chiptype; /* identifier of device, for quirks/etc */ + int bytes_in; /* used for statistics */ + int bytes_out; /* used for statistics */ + int cmd_count; /* used for statistics */ + int cmd_ctrl; /* always set this to 1 before issuing a command */ + struct cypress_buf *buf; /* write buffer */ + int write_urb_in_use; /* write urb in use indicator */ + int termios_initialized; + __u8 line_control; /* holds dtr / rts value */ + __u8 current_status; /* received from last read - info on dsr,cts,cd,ri,etc */ + __u8 current_config; /* stores the current configuration byte */ + __u8 rx_flags; /* throttling - used from whiteheat/ftdi_sio */ + int baud_rate; /* stores current baud rate in integer form */ + int cbr_mask; /* stores current baud rate in masked form */ + int isthrottled; /* if throttled, discard reads */ + wait_queue_head_t delta_msr_wait; /* used for TIOCMIWAIT */ + char prev_status, diff_status; /* used for TIOCMIWAIT */ + /* we pass a pointer to this as the arguement sent to cypress_set_termios old_termios */ + struct termios tmp_termios; /* stores the old termios settings */ + char calledfromopen; /* used when issuing lines on open - fixes rts drop bug */ +}; + +/* write buffer structure */ +struct cypress_buf { + unsigned int buf_size; + char *buf_buf; + char *buf_get; + char *buf_put; +}; + +/* function prototypes for the Cypress USB to serial device */ +static int cypress_earthmate_startup (struct usb_serial *serial); +static int cypress_hidcom_startup (struct usb_serial *serial); +static void cypress_shutdown (struct usb_serial *serial); +static int cypress_open (struct usb_serial_port *port, struct file *filp); +static void cypress_close (struct usb_serial_port *port, struct file *filp); +static int cypress_write (struct usb_serial_port *port, const unsigned char *buf, int count); +static void cypress_send (struct usb_serial_port *port); +static int cypress_write_room (struct usb_serial_port *port); +static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg); +static void cypress_set_termios (struct usb_serial_port *port, struct termios * old); +static int cypress_tiocmget (struct usb_serial_port *port, struct file *file); +static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear); +static int cypress_chars_in_buffer (struct usb_serial_port *port); +static void cypress_throttle (struct usb_serial_port *port); +static void cypress_unthrottle (struct usb_serial_port *port); +static void cypress_read_int_callback (struct urb *urb, struct pt_regs *regs); +static void cypress_write_int_callback (struct urb *urb, struct pt_regs *regs); +/* baud helper functions */ +static int mask_to_rate (unsigned mask); +static unsigned rate_to_mask (int rate); +/* write buffer functions */ +static struct cypress_buf *cypress_buf_alloc(unsigned int size); +static void cypress_buf_free(struct cypress_buf *cb); +static void cypress_buf_clear(struct cypress_buf *cb); +static unsigned int cypress_buf_data_avail(struct cypress_buf *cb); +static unsigned int cypress_buf_space_avail(struct cypress_buf *cb); +static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, + unsigned int count); +static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, + unsigned int count); + + +static struct usb_serial_device_type cypress_earthmate_device = { + .owner = THIS_MODULE, + .name = "DeLorme Earthmate USB", + .short_name = "earthmate", + .id_table = id_table_earthmate, + .num_interrupt_in = 1, + .num_interrupt_out = 1, + .num_bulk_in = NUM_DONT_CARE, + .num_bulk_out = NUM_DONT_CARE, + .num_ports = 1, + .attach = cypress_earthmate_startup, + .shutdown = cypress_shutdown, + .open = cypress_open, + .close = cypress_close, + .write = cypress_write, + .write_room = cypress_write_room, + .ioctl = cypress_ioctl, + .set_termios = cypress_set_termios, + .tiocmget = cypress_tiocmget, + .tiocmset = cypress_tiocmset, + .chars_in_buffer = cypress_chars_in_buffer, + .throttle = cypress_throttle, + .unthrottle = cypress_unthrottle, + .read_int_callback = cypress_read_int_callback, + .write_int_callback = cypress_write_int_callback, +}; + +static struct usb_serial_device_type cypress_hidcom_device = { + .owner = THIS_MODULE, + .name = "HID->COM RS232 Adapter", + .short_name = "cyphidcom", + .id_table = id_table_cyphidcomrs232, + .num_interrupt_in = 1, + .num_interrupt_out = 1, + .num_bulk_in = NUM_DONT_CARE, + .num_bulk_out = NUM_DONT_CARE, + .num_ports = 1, + .attach = cypress_hidcom_startup, + .shutdown = cypress_shutdown, + .open = cypress_open, + .close = cypress_close, + .write = cypress_write, + .write_room = cypress_write_room, + .ioctl = cypress_ioctl, + .set_termios = cypress_set_termios, + .tiocmget = cypress_tiocmget, + .tiocmset = cypress_tiocmset, + .chars_in_buffer = cypress_chars_in_buffer, + .throttle = cypress_throttle, + .unthrottle = cypress_unthrottle, + .read_int_callback = cypress_read_int_callback, + .write_int_callback = cypress_write_int_callback, +}; + + +/***************************************************************************** + * Cypress serial helper functions + *****************************************************************************/ + + +/* This function can either set or retreive the current serial line settings */ +static int cypress_serial_control (struct usb_serial_port *port, unsigned baud_mask, int data_bits, int stop_bits, + int parity_enable, int parity_type, int reset, int cypress_request_type) +{ + int i, n_baud_rate = 0, retval = 0; + struct cypress_private *priv; + __u8 feature_buffer[5]; + __u8 config; + unsigned long flags; + + dbg("%s", __FUNCTION__); + + priv = usb_get_serial_port_data(port); + + switch(cypress_request_type) { + case CYPRESS_SET_CONFIG: + + /* + * The general purpose firmware for the Cypress M8 allows for a maximum speed + * of 57600bps (I have no idea whether DeLorme chose to use the general purpose + * firmware or not), if you need to modify this speed setting for your own + * project please add your own chiptype and modify the code likewise. The + * Cypress HID->COM device will work successfully up to 115200bps. + */ + if (baud_mask != priv->cbr_mask) { + dbg("%s - baud rate is changing", __FUNCTION__); + if ( priv->chiptype == CT_EARTHMATE ) { + /* 300 and 600 baud rates are supported under the generic firmware, + * but are not used with NMEA and SiRF protocols */ + + if ( (baud_mask == B300) || (baud_mask == B600) ) { + err("%s - failed setting baud rate, unsupported speed (default to 4800)", + __FUNCTION__); + n_baud_rate = 4800; + } else if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { + err("%s - failed setting baud rate, unsupported speed (default to 4800)", + __FUNCTION__); + n_baud_rate = 4800; + } + } else if (priv->chiptype == CT_CYPHIDCOM) { + if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { + err("%s - failed setting baud rate, unsupported speed (default to 4800)", + __FUNCTION__); + n_baud_rate = 4800; + } + } else if (priv->chiptype == CT_GENERIC) { + if ( (n_baud_rate = mask_to_rate(baud_mask)) == -1) { + err("%s - failed setting baud rate, unsupported speed (default to 4800)", + __FUNCTION__); + n_baud_rate = 4800; + } + } else { + info("%s - please define your chiptype, using 4800bps default", __FUNCTION__); + n_baud_rate = 4800; + } + } else { /* baud rate not changing, keep the old */ + n_baud_rate = priv->baud_rate; + } + dbg("%s - baud rate is being sent as %d", __FUNCTION__, n_baud_rate); + + + /* + * This algorithm accredited to Jiang Jay Zhang... thanks for all the help! + */ + for (i = 0; i < 4; ++i) { + feature_buffer[i] = ( n_baud_rate >> (i*8) & 0xFF ); + } + + config = 0; // reset config byte + config |= data_bits; // assign data bits in 2 bit space ( max 3 ) + /* 1 bit gap */ + config |= (stop_bits << 3); // assign stop bits in 1 bit space + config |= (parity_enable << 4); // assign parity flag in 1 bit space + config |= (parity_type << 5); // assign parity type in 1 bit space + /* 1 bit gap */ + config |= (reset << 7); // assign reset at end of byte, 1 bit space + + feature_buffer[4] = config; + + dbg("%s - device is being sent this feature report:", __FUNCTION__); + dbg("%s - %02X - %02X - %02X - %02X - %02X", __FUNCTION__, feature_buffer[0], feature_buffer[1], + feature_buffer[2], feature_buffer[3], feature_buffer[4]); + + retval = usb_control_msg (port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0), + HID_REQ_SET_REPORT, USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS, + 0x0300, 0, feature_buffer, 5, 500); + + if (retval != 5) + err("%s - failed sending serial line settings - %d", __FUNCTION__, retval); + else { + spin_lock_irqsave(&priv->lock, flags); + priv->baud_rate = n_baud_rate; + priv->cbr_mask = baud_mask; + priv->current_config = config; + ++priv->cmd_count; + spin_unlock_irqrestore(&priv->lock, flags); + } + break; + case CYPRESS_GET_CONFIG: + dbg("%s - retreiving serial line settings", __FUNCTION__); + /* reset values in feature buffer */ + memset(feature_buffer, 0, 5); + + retval = usb_control_msg (port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0), + HID_REQ_GET_REPORT, USB_DIR_IN | USB_RECIP_INTERFACE | USB_TYPE_CLASS, + 0x0300, 0, feature_buffer, 5, 500); + if (retval != 5) { + err("%s - failed to retreive serial line settings - %d", __FUNCTION__, retval); + return retval; + } else { + spin_lock_irqsave(&priv->lock, flags); + /* store the config in one byte, and later use bit masks to check values */ + priv->current_config = feature_buffer[4]; + /* reverse the process above to get the baud_mask value */ + n_baud_rate = 0; // reset bits + for (i = 0; i < 4; ++i) { + n_baud_rate |= ( feature_buffer[i] << (i*8) ); + } + + priv->baud_rate = n_baud_rate; + if ( (priv->cbr_mask = rate_to_mask(n_baud_rate)) == 0x40) + dbg("%s - failed setting the baud mask (not defined)", __FUNCTION__); + ++priv->cmd_count; + spin_unlock_irqrestore(&priv->lock, flags); + } + break; + default: + err("%s - unsupported serial control command issued", __FUNCTION__); + } + return retval; +} /* cypress_serial_control */ + + +/* given a baud mask, it will return speed on success */ +static int mask_to_rate (unsigned mask) +{ + int rate; + + switch (mask) { + case B0: rate = 0; break; + case B300: rate = 300; break; + case B600: rate = 600; break; + case B1200: rate = 1200; break; + case B2400: rate = 2400; break; + case B4800: rate = 4800; break; + case B9600: rate = 9600; break; + case B19200: rate = 19200; break; + case B38400: rate = 38400; break; + case B57600: rate = 57600; break; + case B115200: rate = 115200; break; + default: rate = -1; + } + + return rate; +} + + +static unsigned rate_to_mask (int rate) +{ + unsigned mask; + + switch (rate) { + case 0: mask = B0; break; + case 300: mask = B300; break; + case 600: mask = B600; break; + case 1200: mask = B1200; break; + case 2400: mask = B2400; break; + case 4800: mask = B4800; break; + case 9600: mask = B9600; break; + case 19200: mask = B19200; break; + case 38400: mask = B38400; break; + case 57600: mask = B57600; break; + case 115200: mask = B115200; break; + default: mask = 0x40; + } + + return mask; +} +/***************************************************************************** + * Cypress serial driver functions + *****************************************************************************/ + + +static int generic_startup (struct usb_serial *serial) +{ + struct cypress_private *priv; + + dbg("%s - port %d", __FUNCTION__, serial->port[0]->number); + + priv = kmalloc(sizeof (struct cypress_private), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + memset(priv, 0x00, sizeof (struct cypress_private)); + spin_lock_init(&priv->lock); + priv->buf = cypress_buf_alloc(CYPRESS_BUF_SIZE); + if (priv->buf == NULL) { + kfree(priv); + return -ENOMEM; + } + init_waitqueue_head(&priv->delta_msr_wait); + + usb_reset_configuration (serial->dev); + + priv->cmd_ctrl = 0; + priv->line_control = 0; + priv->termios_initialized = 0; + priv->calledfromopen = 0; + priv->rx_flags = 0; + usb_set_serial_port_data(serial->port[0], priv); + + return (0); +} + + +static int cypress_earthmate_startup (struct usb_serial *serial) +{ + struct cypress_private *priv; + + dbg("%s", __FUNCTION__); + + if (generic_startup(serial)) { + dbg("%s - Failed setting up port %d", __FUNCTION__, serial->port[0]->number); + return 1; + } + + priv = usb_get_serial_port_data(serial->port[0]); + priv->chiptype = CT_EARTHMATE; + + return (0); +} /* cypress_earthmate_startup */ + + +static int cypress_hidcom_startup (struct usb_serial *serial) +{ + struct cypress_private *priv; + + dbg("%s", __FUNCTION__); + + if (generic_startup(serial)) { + dbg("%s - Failed setting up port %d", __FUNCTION__, serial->port[0]->number); + return 1; + } + + priv = usb_get_serial_port_data(serial->port[0]); + priv->chiptype = CT_CYPHIDCOM; + + return (0); +} /* cypress_hidcom_startup */ + + +static void cypress_shutdown (struct usb_serial *serial) +{ + struct cypress_private *priv; + + dbg ("%s - port %d", __FUNCTION__, serial->port[0]->number); + + /* all open ports are closed at this point */ + + priv = usb_get_serial_port_data(serial->port[0]); + + if (priv) { + cypress_buf_free(priv->buf); + kfree(priv); + usb_set_serial_port_data(serial->port[0], NULL); + } +} + + +static int cypress_open (struct usb_serial_port *port, struct file *filp) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + struct usb_serial *serial = port->serial; + unsigned long flags; + int result = 0; + + dbg("%s - port %d", __FUNCTION__, port->number); + + /* clear halts before open */ + usb_clear_halt(serial->dev, 0x00); + usb_clear_halt(serial->dev, 0x81); + usb_clear_halt(serial->dev, 0x02); + + spin_lock_irqsave(&priv->lock, flags); + /* reset read/write statistics */ + priv->bytes_in = 0; + priv->bytes_out = 0; + priv->cmd_count = 0; + priv->rx_flags = 0; + spin_unlock_irqrestore(&priv->lock, flags); + + /* setting to zero could cause data loss */ + port->tty->low_latency = 1; + + /* raise both lines and set termios */ + spin_lock_irqsave(&priv->lock, flags); + priv->line_control = CONTROL_DTR | CONTROL_RTS; + priv->calledfromopen = 1; + priv->cmd_ctrl = 1; + spin_unlock_irqrestore(&priv->lock, flags); + result = cypress_write(port, NULL, 0); + + if (result) { + dev_err(&port->dev, "%s - failed setting the control lines - error %d\n", __FUNCTION__, result); + return result; + } else + dbg("%s - success setting the control lines", __FUNCTION__); + + cypress_set_termios(port, &priv->tmp_termios); + + /* setup the port and start reading from the device */ + if(!port->interrupt_in_urb){ + err("%s - interrupt_in_urb is empty!", __FUNCTION__); + return(-1); + } + + usb_fill_int_urb(port->interrupt_in_urb, serial->dev, + usb_rcvintpipe(serial->dev, port->interrupt_in_endpointAddress), + port->interrupt_in_urb->transfer_buffer, port->interrupt_in_urb->transfer_buffer_length, + cypress_read_int_callback, port, port->interrupt_in_urb->interval); + result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); + + if (result){ + dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); + } + + return result; +} /* cypress_open */ + + +static void cypress_close(struct usb_serial_port *port, struct file * filp) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + unsigned int c_cflag; + unsigned long flags; + int bps; + long timeout; + wait_queue_t wait; + + dbg("%s - port %d", __FUNCTION__, port->number); + + /* wait for data to drain from buffer */ + spin_lock_irqsave(&priv->lock, flags); + timeout = CYPRESS_CLOSING_WAIT; + init_waitqueue_entry(&wait, current); + add_wait_queue(&port->tty->write_wait, &wait); + for (;;) { + set_current_state(TASK_INTERRUPTIBLE); + if (cypress_buf_data_avail(priv->buf) == 0 + || timeout == 0 || signal_pending(current) + || !usb_get_intfdata(port->serial->interface)) + break; + spin_unlock_irqrestore(&priv->lock, flags); + timeout = schedule_timeout(timeout); + spin_lock_irqsave(&priv->lock, flags); + } + set_current_state(TASK_RUNNING); + remove_wait_queue(&port->tty->write_wait, &wait); + /* clear out any remaining data in the buffer */ + cypress_buf_clear(priv->buf); + spin_unlock_irqrestore(&priv->lock, flags); + + /* wait for characters to drain from device */ + bps = tty_get_baud_rate(port->tty); + if (bps > 1200) + timeout = max((HZ*2560)/bps,HZ/10); + else + timeout = 2*HZ; + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(timeout); + + dbg("%s - stopping urbs", __FUNCTION__); + usb_kill_urb (port->interrupt_in_urb); + usb_kill_urb (port->interrupt_out_urb); + + if (port->tty) { + c_cflag = port->tty->termios->c_cflag; + if (c_cflag & HUPCL) { + /* drop dtr and rts */ + priv = usb_get_serial_port_data(port); + spin_lock_irqsave(&priv->lock, flags); + priv->line_control = 0; + priv->cmd_ctrl = 1; + spin_unlock_irqrestore(&priv->lock, flags); + cypress_write(port, NULL, 0); + } + } + + if (stats) + dev_info (&port->dev, "Statistics: %d Bytes In | %d Bytes Out | %d Commands Issued\n", + priv->bytes_in, priv->bytes_out, priv->cmd_count); +} /* cypress_close */ + + +static int cypress_write(struct usb_serial_port *port, const unsigned char *buf, int count) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + + dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); + + /* line control commands, which need to be executed immediately, + are not put into the buffer for obvious reasons. + */ + if (priv->cmd_ctrl) { + count = 0; + goto finish; + } + + if (!count) + return count; + + spin_lock_irqsave(&priv->lock, flags); + count = cypress_buf_put(priv->buf, buf, count); + spin_unlock_irqrestore(&priv->lock, flags); + +finish: + cypress_send(port); + + return count; +} /* cypress_write */ + + +static void cypress_send(struct usb_serial_port *port) +{ + int count = 0, result, offset, actual_size; + struct cypress_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + dbg("%s - interrupt out size is %d", __FUNCTION__, port->interrupt_out_size); + + spin_lock_irqsave(&priv->lock, flags); + if (priv->write_urb_in_use) { + dbg("%s - can't write, urb in use", __FUNCTION__); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + spin_unlock_irqrestore(&priv->lock, flags); + + /* clear buffer */ + memset(port->interrupt_out_urb->transfer_buffer, 0, port->interrupt_out_size); + + spin_lock_irqsave(&priv->lock, flags); + switch (port->interrupt_out_size) { + case 32: + // this is for the CY7C64013... + offset = 2; + port->interrupt_out_buffer[0] = priv->line_control; + break; + case 8: + // this is for the CY7C63743... + offset = 1; + port->interrupt_out_buffer[0] = priv->line_control; + break; + default: + dbg("%s - wrong packet size", __FUNCTION__); + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + + if (priv->line_control & CONTROL_RESET) + priv->line_control &= ~CONTROL_RESET; + + if (priv->cmd_ctrl) { + priv->cmd_count++; + dbg("%s - line control command being issued", __FUNCTION__); + spin_unlock_irqrestore(&priv->lock, flags); + goto send; + } else + spin_unlock_irqrestore(&priv->lock, flags); + + count = cypress_buf_get(priv->buf, &port->interrupt_out_buffer[offset], + port->interrupt_out_size-offset); + + if (count == 0) { + return; + } + + switch (port->interrupt_out_size) { + case 32: + port->interrupt_out_buffer[1] = count; + break; + case 8: + port->interrupt_out_buffer[0] |= count; + } + + dbg("%s - count is %d", __FUNCTION__, count); + +send: + spin_lock_irqsave(&priv->lock, flags); + priv->write_urb_in_use = 1; + spin_unlock_irqrestore(&priv->lock, flags); + + if (priv->cmd_ctrl) + actual_size = 1; + else + actual_size = count + (port->interrupt_out_size == 32 ? 2 : 1); + + usb_serial_debug_data(debug, &port->dev, __FUNCTION__, port->interrupt_out_size, + port->interrupt_out_urb->transfer_buffer); + + port->interrupt_out_urb->transfer_buffer_length = actual_size; + port->interrupt_out_urb->dev = port->serial->dev; + result = usb_submit_urb (port->interrupt_out_urb, GFP_ATOMIC); + if (result) { + dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, + result); + priv->write_urb_in_use = 0; + } + + spin_lock_irqsave(&priv->lock, flags); + if (priv->cmd_ctrl) { + priv->cmd_ctrl = 0; + } + priv->bytes_out += count; /* do not count the line control and size bytes */ + spin_unlock_irqrestore(&priv->lock, flags); + + schedule_work(&port->work); +} /* cypress_send */ + + +/* returns how much space is available in the soft buffer */ +static int cypress_write_room(struct usb_serial_port *port) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + int room = 0; + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + room = cypress_buf_space_avail(priv->buf); + spin_unlock_irqrestore(&priv->lock, flags); + + dbg("%s - returns %d", __FUNCTION__, room); + return room; +} + + +static int cypress_tiocmget (struct usb_serial_port *port, struct file *file) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + __u8 status, control; + unsigned int result = 0; + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + control = priv->line_control; + status = priv->current_status; + spin_unlock_irqrestore(&priv->lock, flags); + + result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) + | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) + | ((status & UART_CTS) ? TIOCM_CTS : 0) + | ((status & UART_DSR) ? TIOCM_DSR : 0) + | ((status & UART_RI) ? TIOCM_RI : 0) + | ((status & UART_CD) ? TIOCM_CD : 0); + + dbg("%s - result = %x", __FUNCTION__, result); + + return result; +} + + +static int cypress_tiocmset (struct usb_serial_port *port, struct file *file, + unsigned int set, unsigned int clear) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + if (set & TIOCM_RTS) + priv->line_control |= CONTROL_RTS; + if (set & TIOCM_DTR) + priv->line_control |= CONTROL_DTR; + if (clear & TIOCM_RTS) + priv->line_control &= ~CONTROL_RTS; + if (clear & TIOCM_DTR) + priv->line_control &= ~CONTROL_DTR; + spin_unlock_irqrestore(&priv->lock, flags); + + priv->cmd_ctrl = 1; + return cypress_write(port, NULL, 0); +} + + +static int cypress_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + + dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd); + + switch (cmd) { + case TIOCGSERIAL: + if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { + return -EFAULT; + } + return (0); + break; + case TIOCSSERIAL: + if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { + return -EFAULT; + } + /* here we need to call cypress_set_termios to invoke the new settings */ + cypress_set_termios(port, &priv->tmp_termios); + return (0); + break; + /* these are called when setting baud rate from gpsd */ + case TCGETS: + if (copy_to_user((void __user *)arg, port->tty->termios, sizeof(struct termios))) { + return -EFAULT; + } + return (0); + break; + case TCSETS: + if (copy_from_user(port->tty->termios, (void __user *)arg, sizeof(struct termios))) { + return -EFAULT; + } + /* here we need to call cypress_set_termios to invoke the new settings */ + cypress_set_termios(port, &priv->tmp_termios); + return (0); + break; + /* This code comes from drivers/char/serial.c and ftdi_sio.c */ + case TIOCMIWAIT: + while (priv != NULL) { + interruptible_sleep_on(&priv->delta_msr_wait); + /* see if a signal did it */ + if (signal_pending(current)) + return -ERESTARTSYS; + else { + char diff = priv->diff_status; + + if (diff == 0) { + return -EIO; /* no change => error */ + } + + /* consume all events */ + priv->diff_status = 0; + + /* return 0 if caller wanted to know about these bits */ + if ( ((arg & TIOCM_RNG) && (diff & UART_RI)) || + ((arg & TIOCM_DSR) && (diff & UART_DSR)) || + ((arg & TIOCM_CD) && (diff & UART_CD)) || + ((arg & TIOCM_CTS) && (diff & UART_CTS)) ) { + return 0; + } + /* otherwise caller can't care less about what happened, + * and so we continue to wait for more events. + */ + } + } + return 0; + break; + default: + break; + } + + dbg("%s - arg not supported - it was 0x%04x - check include/asm/ioctls.h", __FUNCTION__, cmd); + + return -ENOIOCTLCMD; +} /* cypress_ioctl */ + + +static void cypress_set_termios (struct usb_serial_port *port, struct termios *old_termios) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + struct tty_struct *tty; + int data_bits, stop_bits, parity_type, parity_enable; + unsigned cflag, iflag, baud_mask; + unsigned long flags; + __u8 oldlines; + int linechange; + + dbg("%s - port %d", __FUNCTION__, port->number); + + tty = port->tty; + if ((!tty) || (!tty->termios)) { + dbg("%s - no tty structures", __FUNCTION__); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (!priv->termios_initialized) { + if (priv->chiptype == CT_EARTHMATE) { + *(tty->termios) = tty_std_termios; + tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; + } else if (priv->chiptype == CT_CYPHIDCOM) { + *(tty->termios) = tty_std_termios; + tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + } + priv->termios_initialized = 1; + } + spin_unlock_irqrestore(&priv->lock, flags); + + cflag = tty->termios->c_cflag; + iflag = tty->termios->c_iflag; + + /* check if there are new settings */ + if (old_termios) { + if ((cflag != old_termios->c_cflag) || + (RELEVANT_IFLAG(iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) { + dbg("%s - attempting to set new termios settings", __FUNCTION__); + /* should make a copy of this in case something goes wrong in the function, we can restore it */ + spin_lock_irqsave(&priv->lock, flags); + priv->tmp_termios = *(tty->termios); + spin_unlock_irqrestore(&priv->lock, flags); + } else { + dbg("%s - nothing to do, exiting", __FUNCTION__); + return; + } + } else + return; + + /* set number of data bits, parity, stop bits */ + /* when parity is disabled the parity type bit is ignored */ + + stop_bits = cflag & CSTOPB ? 1 : 0; /* 1 means 2 stop bits, 0 means 1 stop bit */ + + if (cflag & PARENB) { + parity_enable = 1; + parity_type = cflag & PARODD ? 1 : 0; /* 1 means odd parity, 0 means even parity */ + } else + parity_enable = parity_type = 0; + + if (cflag & CSIZE) { + switch (cflag & CSIZE) { + case CS5: data_bits = 0; break; + case CS6: data_bits = 1; break; + case CS7: data_bits = 2; break; + case CS8: data_bits = 3; break; + default: err("%s - CSIZE was set, but not CS5-CS8", __FUNCTION__); data_bits = 3; + } + } else + data_bits = 3; + + spin_lock_irqsave(&priv->lock, flags); + oldlines = priv->line_control; + if ((cflag & CBAUD) == B0) { + /* drop dtr and rts */ + dbg("%s - dropping the lines, baud rate 0bps", __FUNCTION__); + baud_mask = B0; + priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); + } else { + baud_mask = (cflag & CBAUD); + switch(baud_mask) { + case B300: dbg("%s - setting baud 300bps", __FUNCTION__); break; + case B600: dbg("%s - setting baud 600bps", __FUNCTION__); break; + case B1200: dbg("%s - setting baud 1200bps", __FUNCTION__); break; + case B2400: dbg("%s - setting baud 2400bps", __FUNCTION__); break; + case B4800: dbg("%s - setting baud 4800bps", __FUNCTION__); break; + case B9600: dbg("%s - setting baud 9600bps", __FUNCTION__); break; + case B19200: dbg("%s - setting baud 19200bps", __FUNCTION__); break; + case B38400: dbg("%s - setting baud 38400bps", __FUNCTION__); break; + case B57600: dbg("%s - setting baud 57600bps", __FUNCTION__); break; + case B115200: dbg("%s - setting baud 115200bps", __FUNCTION__); break; + default: dbg("%s - unknown masked baud rate", __FUNCTION__); + } + priv->line_control |= CONTROL_DTR; + + /* toggle CRTSCTS? - don't do this if being called from cypress_open */ + if (!priv->calledfromopen) { + if (cflag & CRTSCTS) + priv->line_control |= CONTROL_RTS; + else + priv->line_control &= ~CONTROL_RTS; + } + } + spin_unlock_irqrestore(&priv->lock, flags); + + dbg("%s - sending %d stop_bits, %d parity_enable, %d parity_type, %d data_bits (+5)", __FUNCTION__, + stop_bits, parity_enable, parity_type, data_bits); + + cypress_serial_control(port, baud_mask, data_bits, stop_bits, parity_enable, + parity_type, 0, CYPRESS_SET_CONFIG); + + msleep(50); /* give some time between change and read (50ms) */ + + /* we perform a CYPRESS_GET_CONFIG so that the current settings are filled into the private structure + * this should confirm that all is working if it returns what we just set */ + cypress_serial_control(port, 0, 0, 0, 0, 0, 0, CYPRESS_GET_CONFIG); + + /* Here we can define custom tty settings for devices + * + * the main tty termios flag base comes from empeg.c + */ + + spin_lock_irqsave(&priv->lock, flags); + if ( (priv->chiptype == CT_EARTHMATE) && (priv->baud_rate == 4800) ) { + + dbg("Using custom termios settings for a baud rate of 4800bps."); + /* define custom termios settings for NMEA protocol */ + + + tty->termios->c_iflag /* input modes - */ + &= ~(IGNBRK /* disable ignore break */ + | BRKINT /* disable break causes interrupt */ + | PARMRK /* disable mark parity errors */ + | ISTRIP /* disable clear high bit of input characters */ + | INLCR /* disable translate NL to CR */ + | IGNCR /* disable ignore CR */ + | ICRNL /* disable translate CR to NL */ + | IXON); /* disable enable XON/XOFF flow control */ + + tty->termios->c_oflag /* output modes */ + &= ~OPOST; /* disable postprocess output characters */ + + tty->termios->c_lflag /* line discipline modes */ + &= ~(ECHO /* disable echo input characters */ + | ECHONL /* disable echo new line */ + | ICANON /* disable erase, kill, werase, and rprnt special characters */ + | ISIG /* disable interrupt, quit, and suspend special characters */ + | IEXTEN); /* disable non-POSIX special characters */ + + } else if (priv->chiptype == CT_CYPHIDCOM) { + + // Software app handling it for device... + + } + linechange = (priv->line_control != oldlines); + spin_unlock_irqrestore(&priv->lock, flags); + + /* if necessary, set lines */ + if (!priv->calledfromopen && linechange) { + priv->cmd_ctrl = 1; + cypress_write(port, NULL, 0); + } + + if (priv->calledfromopen) + priv->calledfromopen = 0; + +} /* cypress_set_termios */ + + +/* returns amount of data still left in soft buffer */ +static int cypress_chars_in_buffer(struct usb_serial_port *port) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + int chars = 0; + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + chars = cypress_buf_data_avail(priv->buf); + spin_unlock_irqrestore(&priv->lock, flags); + + dbg("%s - returns %d", __FUNCTION__, chars); + return chars; +} + + +static void cypress_throttle (struct usb_serial_port *port) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + priv->rx_flags = THROTTLED; + spin_unlock_irqrestore(&priv->lock, flags); +} + + +static void cypress_unthrottle (struct usb_serial_port *port) +{ + struct cypress_private *priv = usb_get_serial_port_data(port); + int actually_throttled, result; + unsigned long flags; + + dbg("%s - port %d", __FUNCTION__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + actually_throttled = priv->rx_flags & ACTUALLY_THROTTLED; + priv->rx_flags = 0; + spin_unlock_irqrestore(&priv->lock, flags); + + if (actually_throttled) { + port->interrupt_in_urb->dev = port->serial->dev; + + result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); + if (result) + dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); + } +} + + +static void cypress_read_int_callback(struct urb *urb, struct pt_regs *regs) +{ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct cypress_private *priv = usb_get_serial_port_data(port); + struct tty_struct *tty; + unsigned char *data = urb->transfer_buffer; + unsigned long flags; + char tty_flag = TTY_NORMAL; + int havedata = 0; + int bytes = 0; + int result; + int i = 0; + + dbg("%s - port %d", __FUNCTION__, port->number); + + if (urb->status) { + dbg("%s - nonzero read status received: %d", __FUNCTION__, urb->status); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + if (priv->rx_flags & THROTTLED) { + dbg("%s - now throttling", __FUNCTION__); + priv->rx_flags |= ACTUALLY_THROTTLED; + spin_unlock_irqrestore(&priv->lock, flags); + return; + } + spin_unlock_irqrestore(&priv->lock, flags); + + tty = port->tty; + if (!tty) { + dbg("%s - bad tty pointer - exiting", __FUNCTION__); + return; + } + + spin_lock_irqsave(&priv->lock, flags); + switch(urb->actual_length) { + case 32: + // This is for the CY7C64013... + priv->current_status = data[0] & 0xF8; + bytes = data[1]+2; + i=2; + if (bytes > 2) + havedata = 1; + break; + case 8: + // This is for the CY7C63743... + priv->current_status = data[0] & 0xF8; + bytes = (data[0] & 0x07)+1; + i=1; + if (bytes > 1) + havedata = 1; + break; + default: + dbg("%s - wrong packet size - received %d bytes", __FUNCTION__, urb->actual_length); + spin_unlock_irqrestore(&priv->lock, flags); + goto continue_read; + } + spin_unlock_irqrestore(&priv->lock, flags); + + usb_serial_debug_data (debug, &port->dev, __FUNCTION__, urb->actual_length, data); + + spin_lock_irqsave(&priv->lock, flags); + /* check to see if status has changed */ + if (priv != NULL) { + if (priv->current_status != priv->prev_status) { + priv->diff_status |= priv->current_status ^ priv->prev_status; + wake_up_interruptible(&priv->delta_msr_wait); + priv->prev_status = priv->current_status; + } + } + spin_unlock_irqrestore(&priv->lock, flags); + + /* hangup, as defined in acm.c... this might be a bad place for it though */ + if (tty && !(tty->termios->c_cflag & CLOCAL) && !(priv->current_status & UART_CD)) { + dbg("%s - calling hangup", __FUNCTION__); + tty_hangup(tty); + goto continue_read; + } + + /* There is one error bit... I'm assuming it is a parity error indicator + * as the generic firmware will set this bit to 1 if a parity error occurs. + * I can not find reference to any other error events. + * + */ + spin_lock_irqsave(&priv->lock, flags); + if (priv->current_status & CYP_ERROR) { + spin_unlock_irqrestore(&priv->lock, flags); + tty_flag = TTY_PARITY; + dbg("%s - Parity Error detected", __FUNCTION__); + } else + spin_unlock_irqrestore(&priv->lock, flags); + + /* process read if there is data other than line status */ + if (tty && (bytes > i)) { + for (; i < bytes ; ++i) { + dbg("pushing byte number %d - %d - %c",i,data[i],data[i]); + if(tty->flip.count >= TTY_FLIPBUF_SIZE) { + tty_flip_buffer_push(tty); + } + tty_insert_flip_char(tty, data[i], tty_flag); + } + tty_flip_buffer_push(port->tty); + } + + spin_lock_irqsave(&priv->lock, flags); + priv->bytes_in += bytes; /* control and status byte(s) are also counted */ + spin_unlock_irqrestore(&priv->lock, flags); + +continue_read: + + /* Continue trying to always read... unless the port has closed. */ + + if (port->open_count > 0) { + usb_fill_int_urb(port->interrupt_in_urb, port->serial->dev, + usb_rcvintpipe(port->serial->dev, port->interrupt_in_endpointAddress), + port->interrupt_in_urb->transfer_buffer, + port->interrupt_in_urb->transfer_buffer_length, + cypress_read_int_callback, port, + port->interrupt_in_urb->interval); + result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); + if (result) + dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); + } + + return; +} /* cypress_read_int_callback */ + + +static void cypress_write_int_callback(struct urb *urb, struct pt_regs *regs) +{ + struct usb_serial_port *port = (struct usb_serial_port *)urb->context; + struct cypress_private *priv = usb_get_serial_port_data(port); + int result; + + dbg("%s - port %d", __FUNCTION__, port->number); + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); + priv->write_urb_in_use = 0; + return; + default: + /* error in the urb, so we have to resubmit it */ + dbg("%s - Overflow in write", __FUNCTION__); + dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); + port->interrupt_out_urb->transfer_buffer_length = 1; + port->interrupt_out_urb->dev = port->serial->dev; + result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC); + if (result) + dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", + __FUNCTION__, result); + else + return; + } + + priv->write_urb_in_use = 0; + + /* send any buffered data */ + cypress_send(port); +} + + +/***************************************************************************** + * Write buffer functions - buffering code from pl2303 used + *****************************************************************************/ + +/* + * cypress_buf_alloc + * + * Allocate a circular buffer and all associated memory. + */ + +static struct cypress_buf *cypress_buf_alloc(unsigned int size) +{ + + struct cypress_buf *cb; + + + if (size == 0) + return NULL; + + cb = (struct cypress_buf *)kmalloc(sizeof(struct cypress_buf), GFP_KERNEL); + if (cb == NULL) + return NULL; + + cb->buf_buf = kmalloc(size, GFP_KERNEL); + if (cb->buf_buf == NULL) { + kfree(cb); + return NULL; + } + + cb->buf_size = size; + cb->buf_get = cb->buf_put = cb->buf_buf; + + return cb; + +} + + +/* + * cypress_buf_free + * + * Free the buffer and all associated memory. + */ + +static void cypress_buf_free(struct cypress_buf *cb) +{ + if (cb != NULL) { + if (cb->buf_buf != NULL) + kfree(cb->buf_buf); + kfree(cb); + } +} + + +/* + * cypress_buf_clear + * + * Clear out all data in the circular buffer. + */ + +static void cypress_buf_clear(struct cypress_buf *cb) +{ + if (cb != NULL) + cb->buf_get = cb->buf_put; + /* equivalent to a get of all data available */ +} + + +/* + * cypress_buf_data_avail + * + * Return the number of bytes of data available in the circular + * buffer. + */ + +static unsigned int cypress_buf_data_avail(struct cypress_buf *cb) +{ + if (cb != NULL) + return ((cb->buf_size + cb->buf_put - cb->buf_get) % cb->buf_size); + else + return 0; +} + + +/* + * cypress_buf_space_avail + * + * Return the number of bytes of space available in the circular + * buffer. + */ + +static unsigned int cypress_buf_space_avail(struct cypress_buf *cb) +{ + if (cb != NULL) + return ((cb->buf_size + cb->buf_get - cb->buf_put - 1) % cb->buf_size); + else + return 0; +} + + +/* + * cypress_buf_put + * + * Copy data data from a user buffer and put it into the circular buffer. + * Restrict to the amount of space available. + * + * Return the number of bytes copied. + */ + +static unsigned int cypress_buf_put(struct cypress_buf *cb, const char *buf, + unsigned int count) +{ + + unsigned int len; + + + if (cb == NULL) + return 0; + + len = cypress_buf_space_avail(cb); + if (count > len) + count = len; + + if (count == 0) + return 0; + + len = cb->buf_buf + cb->buf_size - cb->buf_put; + if (count > len) { + memcpy(cb->buf_put, buf, len); + memcpy(cb->buf_buf, buf+len, count - len); + cb->buf_put = cb->buf_buf + count - len; + } else { + memcpy(cb->buf_put, buf, count); + if (count < len) + cb->buf_put += count; + else /* count == len */ + cb->buf_put = cb->buf_buf; + } + + return count; + +} + + +/* + * cypress_buf_get + * + * Get data from the circular buffer and copy to the given buffer. + * Restrict to the amount of data available. + * + * Return the number of bytes copied. + */ + +static unsigned int cypress_buf_get(struct cypress_buf *cb, char *buf, + unsigned int count) +{ + + unsigned int len; + + + if (cb == NULL) + return 0; + + len = cypress_buf_data_avail(cb); + if (count > len) + count = len; + + if (count == 0) + return 0; + + len = cb->buf_buf + cb->buf_size - cb->buf_get; + if (count > len) { + memcpy(buf, cb->buf_get, len); + memcpy(buf+len, cb->buf_buf, count - len); + cb->buf_get = cb->buf_buf + count - len; + } else { + memcpy(buf, cb->buf_get, count); + if (count < len) + cb->buf_get += count; + else /* count == len */ + cb->buf_get = cb->buf_buf; + } + + return count; + +} + +/***************************************************************************** + * Module functions + *****************************************************************************/ + +static int __init cypress_init(void) +{ + int retval; + + dbg("%s", __FUNCTION__); + + retval = usb_serial_register(&cypress_earthmate_device); + if (retval) + goto failed_em_register; + retval = usb_serial_register(&cypress_hidcom_device); + if (retval) + goto failed_hidcom_register; + retval = usb_register(&cypress_driver); + if (retval) + goto failed_usb_register; + + info(DRIVER_DESC " " DRIVER_VERSION); + return 0; +failed_usb_register: + usb_deregister(&cypress_driver); +failed_hidcom_register: + usb_serial_deregister(&cypress_hidcom_device); +failed_em_register: + usb_serial_deregister(&cypress_earthmate_device); + + return retval; +} + + +static void __exit cypress_exit (void) +{ + dbg("%s", __FUNCTION__); + + usb_deregister (&cypress_driver); + usb_serial_deregister (&cypress_earthmate_device); + usb_serial_deregister (&cypress_hidcom_device); +} + + +module_init(cypress_init); +module_exit(cypress_exit); + +MODULE_AUTHOR( DRIVER_AUTHOR ); +MODULE_DESCRIPTION( DRIVER_DESC ); +MODULE_VERSION( DRIVER_VERSION ); +MODULE_LICENSE("GPL"); + +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug enabled or not"); +module_param(stats, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(stats, "Enable statistics or not"); |