diff options
Diffstat (limited to 'drivers/usb/serial')
| -rw-r--r-- | drivers/usb/serial/metro-usb.c | 160 |
1 files changed, 65 insertions, 95 deletions
diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index d22a603..66e9355 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -1,32 +1,9 @@ /* - Date Created: 9/15/2006 - File Name: metro-usb.c - Description: metro-usb.c is the drivers main source file. The driver is a USB to Serial converter. - The driver takes USB data and sends it to a virtual ttyUSB# serial port. - The driver interfaces with the usbserial.ko driver supplied by Linux. - - NOTES: - To install the driver: - 1. Install the usbserial.ko module supplied by Linux with: # insmod usbserial.ko - 2. Install the metro-usb.ko module with: # insmod metro-usb.ko - - Some of this code is credited to Linux USB open source files that are distributed with Linux. + Some of this code is credited to Linux USB open source files that are + distributed with Linux. Copyright: 2007 Metrologic Instruments. All rights reserved. Copyright: 2011 Azimut Ltd. <http://azimutrzn.ru/> - Requirements: gedit.exe, notepad.exe - - Revision History: - - Date: Developer: Revisions: - ------------------------------------------------------------------------------ - 1/30/2007 Philip Nicastro Initial release. (v1.0.0.0) - 2/27/2007 Philip Nicastro Changed the metrousb_read_int_callback function to use a loop with the tty_insert_flip_char function to copy each byte to the tty layer. Removed the tty_buffer_request_room and the tty_insert_flip_string function calls. These calls were not supported on Fedora. - 2/27/2007 Philip Nicastro Released. (v1.1.0.0) - 10/07/2011 Aleksey Babahin Update for new kernel (tested on 2.6.38) - Add unidirection mode support - - */ #include <linux/kernel.h> @@ -41,8 +18,8 @@ #include <linux/moduleparam.h> #include <linux/spinlock.h> #include <linux/errno.h> +#include <linux/uaccess.h> #include <linux/usb/serial.h> -#include <asm/uaccess.h> /* Version Information */ #define DRIVER_VERSION "v1.2.0.0" @@ -59,7 +36,7 @@ #define METROUSB_MCR_NONE 0x08 /* Deactivate DTR and RTS. */ #define METROUSB_MCR_RTS 0x0a /* Activate RTS. */ #define METROUSB_MCR_DTR 0x09 /* Activate DTR. */ -#define WDR_TIMEOUT 5000 /* default urb timeout. */ +#define WDR_TIMEOUT 5000 /* default urb timeout. */ /* Private data structure. */ struct metrousb_private { @@ -69,7 +46,7 @@ struct metrousb_private { }; /* Device table list. */ -static struct usb_device_id id_table [] = { +static struct usb_device_id id_table[] = { { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID) }, { USB_DEVICE(FOCUS_VENDOR_ID, FOCUS_PRODUCT_ID_UNI) }, { }, /* Terminating entry. */ @@ -80,12 +57,12 @@ MODULE_DEVICE_TABLE(usb, id_table); static bool debug; /* Function prototypes. */ -static void metrousb_cleanup (struct usb_serial_port *port); -static void metrousb_close (struct usb_serial_port *port); -static int metrousb_open (struct tty_struct *tty, struct usb_serial_port *port); -static void metrousb_read_int_callback (struct urb *urb); -static void metrousb_shutdown (struct usb_serial *serial); -static int metrousb_startup (struct usb_serial *serial); +static void metrousb_cleanup(struct usb_serial_port *port); +static void metrousb_close(struct usb_serial_port *port); +static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port); +static void metrousb_read_int_callback(struct urb *urb); +static void metrousb_shutdown(struct usb_serial *serial); +static int metrousb_startup(struct usb_serial *serial); static void metrousb_throttle(struct tty_struct *tty); static int metrousb_tiocmget(struct tty_struct *tty); static int metrousb_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); @@ -105,18 +82,18 @@ static struct usb_serial_driver metrousb_device = { .owner = THIS_MODULE, .name = "metro-usb", }, - .description = "Metrologic USB to serial converter.", - .id_table = id_table, - .num_ports = 1, - .open = metrousb_open, - .close = metrousb_close, - .read_int_callback = metrousb_read_int_callback, - .attach = metrousb_startup, - .release = metrousb_shutdown, - .throttle = metrousb_throttle, - .unthrottle = metrousb_unthrottle, - .tiocmget = metrousb_tiocmget, - .tiocmset = metrousb_tiocmset, + .description = "Metrologic USB to serial converter.", + .id_table = id_table, + .num_ports = 1, + .open = metrousb_open, + .close = metrousb_close, + .read_int_callback = metrousb_read_int_callback, + .attach = metrousb_startup, + .release = metrousb_shutdown, + .throttle = metrousb_throttle, + .unthrottle = metrousb_unthrottle, + .tiocmget = metrousb_tiocmget, + .tiocmset = metrousb_tiocmset, }; static struct usb_serial_driver * const serial_drivers[] = { @@ -134,7 +111,7 @@ static struct usb_serial_driver * const serial_drivers[] = { Output: int: Returns true (0) if successful, false otherwise. */ -static void metrousb_cleanup (struct usb_serial_port *port) +static void metrousb_cleanup(struct usb_serial_port *port) { dbg("METRO-USB - %s - port number=%d", __FUNCTION__, port->number); @@ -144,12 +121,6 @@ static void metrousb_cleanup (struct usb_serial_port *port) usb_unlink_urb(port->interrupt_in_urb); usb_kill_urb(port->interrupt_in_urb); } - - // temp - // this will be needed for the write urb - /* Shutdown any interrupt_out_urbs. */ - //if (serial->num_bulk_in) - // usb_kill_urb(port->read_urb); } } @@ -164,7 +135,7 @@ static void metrousb_cleanup (struct usb_serial_port *port) Output: int: Returns true (0) if successful, false otherwise. */ -static void metrousb_close (struct usb_serial_port *port) +static void metrousb_close(struct usb_serial_port *port) { dbg("METRO-USB - %s - port number=%d", __FUNCTION__, port->number); metrousb_cleanup(port); @@ -181,7 +152,7 @@ static void metrousb_close (struct usb_serial_port *port) Output: int: Returns true (0) if successful, false otherwise. */ -static int metrousb_open (struct tty_struct *tty, struct usb_serial_port *port) +static int metrousb_open(struct tty_struct *tty, struct usb_serial_port *port) { struct usb_serial *serial = port->serial; struct metrousb_private *metro_priv = usb_get_serial_port_data(port); @@ -207,16 +178,15 @@ static int metrousb_open (struct tty_struct *tty, struct usb_serial_port *port) * through, otherwise it is scheduled, and with high data rates (like * with OHCI) data can get lost. */ - if (tty) { + if (tty) tty->low_latency = 1; - } /* Clear the urb pipe. */ usb_clear_halt(serial->dev, port->interrupt_in_urb->pipe); /* Start reading from the device */ - usb_fill_int_urb (port->interrupt_in_urb, serial->dev, - usb_rcvintpipe (serial->dev, port->interrupt_in_endpointAddress), + 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, metrousb_read_int_callback, port, 1); @@ -244,7 +214,7 @@ exit: Output: None: */ -static void metrousb_read_int_callback (struct urb *urb) +static void metrousb_read_int_callback(struct urb *urb) { struct usb_serial_port *port = (struct usb_serial_port *)urb->context; struct metrousb_private *metro_priv = usb_get_serial_port_data(port); @@ -257,20 +227,20 @@ static void metrousb_read_int_callback (struct urb *urb) dbg("METRO-USB - %s - port number=%d", __FUNCTION__, port->number); switch (urb->status) { - case 0: - /* Success status, read from the port. */ - break; - case -ECONNRESET: - case -ENOENT: - case -ESHUTDOWN: - /* urb has been terminated. */ - dbg("METRO-USB - %s - urb shutting down, port number=%d, error code=%d", - __FUNCTION__, port->number, result); - return; - default: - dbg("METRO-USB - %s - non-zero urb received, port number=%d, error code=%d", - __FUNCTION__, port->number, result); - goto exit; + case 0: + /* Success status, read from the port. */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* urb has been terminated. */ + dbg("METRO-USB - %s - urb shutting down, port number=%d, error code=%d", + __FUNCTION__, port->number, result); + return; + default: + dbg("METRO-USB - %s - non-zero urb received, port number=%d, error code=%d", + __FUNCTION__, port->number, result); + goto exit; } @@ -282,10 +252,10 @@ static void metrousb_read_int_callback (struct urb *urb) } if (tty && urb->actual_length) { - // Loop through the data copying each byte to the tty layer. + /* Loop through the data copying each byte to the tty layer. */ tty_insert_flip_string(tty, data, urb->actual_length); - // Force the data to the tty layer. + /* Force the data to the tty layer. */ tty_flip_buffer_push(tty); } tty_kref_put(tty); @@ -297,11 +267,11 @@ static void metrousb_read_int_callback (struct urb *urb) /* Continue trying to read if set. */ if (!throttled) { - 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, - metrousb_read_int_callback, port, 1); + 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, + metrousb_read_int_callback, port, 1); result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); @@ -314,7 +284,7 @@ static void metrousb_read_int_callback (struct urb *urb) exit: /* Try to resubmit the urb. */ - result = usb_submit_urb (urb, GFP_ATOMIC); + result = usb_submit_urb(urb, GFP_ATOMIC); if (result) { dbg("METRO-USB - %s - failed submitting interrupt in urb for port number=%d, error code=%d", __FUNCTION__, port->number, result); @@ -366,14 +336,14 @@ static int metrousb_set_modem_ctrl(struct usb_serial *serial, unsigned int contr Output: int: Returns true (0) if successful, false otherwise. */ -static void metrousb_shutdown (struct usb_serial *serial) +static void metrousb_shutdown(struct usb_serial *serial) { int i = 0; dbg("METRO-USB - %s", __FUNCTION__); /* Stop reading and writing on all ports. */ - for (i=0; i < serial->num_ports; ++i) { + for (i = 0; i < serial->num_ports; ++i) { /* Close any open urbs. */ metrousb_cleanup(serial->port[i]); @@ -409,12 +379,12 @@ static int metrousb_startup(struct usb_serial *serial) port = serial->port[i]; /* Declare memory. */ - metro_priv = (struct metrousb_private *) kmalloc (sizeof(struct metrousb_private), GFP_KERNEL); + metro_priv = kmalloc(sizeof(struct metrousb_private), GFP_KERNEL); if (!metro_priv) return -ENOMEM; /* Clear memory. */ - memset (metro_priv, 0x00, sizeof(struct metrousb_private)); + memset(metro_priv, 0x00, sizeof(struct metrousb_private)); /* Initialize memory. */ spin_lock_init(&metro_priv->lock); @@ -436,7 +406,7 @@ static int metrousb_startup(struct usb_serial *serial) Output: None: */ -static void metrousb_throttle (struct tty_struct *tty) +static void metrousb_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct metrousb_private *metro_priv = usb_get_serial_port_data(port); @@ -461,7 +431,7 @@ static void metrousb_throttle (struct tty_struct *tty) Output: int: Returns the state of the control lines. */ -static int metrousb_tiocmget (struct tty_struct *tty) +static int metrousb_tiocmget(struct tty_struct *tty) { unsigned long control_state = 0; struct usb_serial_port *port = tty->driver_data; @@ -490,8 +460,8 @@ static int metrousb_tiocmget (struct tty_struct *tty) Output: int: Returns the state of the control lines. */ -static int metrousb_tiocmset (struct tty_struct *tty, - unsigned int set, unsigned int clear) +static int metrousb_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; struct usb_serial *serial = port->serial; @@ -504,7 +474,7 @@ static int metrousb_tiocmset (struct tty_struct *tty, spin_lock_irqsave(&metro_priv->lock, flags); control_state = metro_priv->control_state; - // Set the RTS and DTR values. + /* Set the RTS and DTR values. */ if (set & TIOCM_RTS) control_state |= TIOCM_RTS; if (set & TIOCM_DTR) @@ -529,7 +499,7 @@ static int metrousb_tiocmset (struct tty_struct *tty, Output: None: */ -static void metrousb_unthrottle (struct tty_struct *tty) +static void metrousb_unthrottle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct metrousb_private *metro_priv = usb_get_serial_port_data(port); @@ -555,9 +525,9 @@ static void metrousb_unthrottle (struct tty_struct *tty) module_usb_serial_driver(metrousb_driver, serial_drivers); MODULE_LICENSE("GPL"); -MODULE_AUTHOR( "Philip Nicastro" ); -MODULE_AUTHOR( "Aleksey Babahin <tamerlan311@gmail.com>" ); -MODULE_DESCRIPTION( DRIVER_DESC ); +MODULE_AUTHOR("Philip Nicastro"); +MODULE_AUTHOR("Aleksey Babahin <tamerlan311@gmail.com>"); +MODULE_DESCRIPTION(DRIVER_DESC); /* Module input parameters */ module_param(debug, bool, S_IRUGO | S_IWUSR); |
