diff options
Diffstat (limited to 'drivers/usb/serial/safe_serial.c')
-rw-r--r-- | drivers/usb/serial/safe_serial.c | 290 |
1 files changed, 157 insertions, 133 deletions
diff --git a/drivers/usb/serial/safe_serial.c b/drivers/usb/serial/safe_serial.c index f823e4dcea1e..def52d07a4ea 100644 --- a/drivers/usb/serial/safe_serial.c +++ b/drivers/usb/serial/safe_serial.c @@ -13,24 +13,25 @@ * Stuart Lynne <sl@lineo.com>, Tom Rushworth <tbr@lineo.com> */ -/* - * The encapsultaion is designed to overcome difficulties with some USB hardware. +/* + * The encapsultaion is designed to overcome difficulties with some USB + * hardware. * * While the USB protocol has a CRC over the data while in transit, i.e. while - * being carried over the bus, there is no end to end protection. If the hardware - * has any problems getting the data into or out of the USB transmit and receive - * FIFO's then data can be lost. + * being carried over the bus, there is no end to end protection. If the + * hardware has any problems getting the data into or out of the USB transmit + * and receive FIFO's then data can be lost. * - * This protocol adds a two byte trailer to each USB packet to specify the number - * of bytes of valid data and a 10 bit CRC that will allow the receiver to verify - * that the entire USB packet was received without error. + * This protocol adds a two byte trailer to each USB packet to specify the + * number of bytes of valid data and a 10 bit CRC that will allow the receiver + * to verify that the entire USB packet was received without error. * - * Because in this case the sender and receiver are the class and function drivers - * there is now end to end protection. + * Because in this case the sender and receiver are the class and function + * drivers there is now end to end protection. * - * There is an additional option that can be used to force all transmitted packets - * to be padded to the maximum packet size. This provides a work around for some - * devices which have problems with small USB packets. + * There is an additional option that can be used to force all transmitted + * packets to be padded to the maximum packet size. This provides a work + * around for some devices which have problems with small USB packets. * * Assuming a packetsize of N: * @@ -44,11 +45,12 @@ * | Data Length | 10 bit CRC | * + 7 . 6 . 5 . 4 . 3 . 2 . 1 . 0 | 7 . 6 . 5 . 4 . 3 . 2 . 1 . 0 + * - * The 10 bit CRC is computed across the sent data, followed by the trailer with - * the length set and the CRC set to zero. The CRC is then OR'd into the trailer. + * The 10 bit CRC is computed across the sent data, followed by the trailer + * with the length set and the CRC set to zero. The CRC is then OR'd into + * the trailer. * - * When received a 10 bit CRC is computed over the entire frame including the trailer - * and should be equal to zero. + * When received a 10 bit CRC is computed over the entire frame including + * the trailer and should be equal to zero. * * Two module parameters are used to control the encapsulation, if both are * turned of the module works as a simple serial device with NO @@ -69,7 +71,7 @@ #include <linux/tty_flip.h> #include <linux/module.h> #include <linux/spinlock.h> -#include <asm/uaccess.h> +#include <linux/uaccess.h> #include <linux/usb.h> #include <linux/usb/serial.h> @@ -86,12 +88,12 @@ static int padded = CONFIG_USB_SERIAL_SAFE_PADDED; #define DRIVER_AUTHOR "sl@lineo.com, tbr@lineo.com" #define DRIVER_DESC "USB Safe Encapsulated Serial" -MODULE_AUTHOR (DRIVER_AUTHOR); -MODULE_DESCRIPTION (DRIVER_DESC); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); -static __u16 vendor; // no default -static __u16 product; // no default +static __u16 vendor; /* no default */ +static __u16 product; /* no default */ module_param(vendor, ushort, 0); MODULE_PARM_DESC(vendor, "User specified USB idVendor (required)"); module_param(product, ushort, 0); @@ -122,30 +124,31 @@ MODULE_PARM_DESC(padded, "Pad to full wMaxPacketSize On/Off"); #define LINEO_SAFESERIAL_CRC_PADDED 0x02 -#define MY_USB_DEVICE(vend,prod,dc,ic,isc) \ - .match_flags = USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS | \ - USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS, \ - .idVendor = (vend), \ - .idProduct = (prod),\ - .bDeviceClass = (dc),\ - .bInterfaceClass = (ic), \ - .bInterfaceSubClass = (isc), +#define MY_USB_DEVICE(vend, prod, dc, ic, isc) \ + .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ + USB_DEVICE_ID_MATCH_DEV_CLASS | \ + USB_DEVICE_ID_MATCH_INT_CLASS | \ + USB_DEVICE_ID_MATCH_INT_SUBCLASS, \ + .idVendor = (vend), \ + .idProduct = (prod),\ + .bDeviceClass = (dc),\ + .bInterfaceClass = (ic), \ + .bInterfaceSubClass = (isc), static struct usb_device_id id_table[] = { - {MY_USB_DEVICE (0x49f, 0xffff, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Itsy - {MY_USB_DEVICE (0x3f0, 0x2101, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Calypso - {MY_USB_DEVICE (0x4dd, 0x8001, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Iris - {MY_USB_DEVICE (0x4dd, 0x8002, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Collie - {MY_USB_DEVICE (0x4dd, 0x8003, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Collie - {MY_USB_DEVICE (0x4dd, 0x8004, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Collie - {MY_USB_DEVICE (0x5f9, 0xffff, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, // Sharp tmp - // extra null entry for module - // vendor/produc parameters - {MY_USB_DEVICE (0, 0, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, - {} // terminating entry + {MY_USB_DEVICE(0x49f, 0xffff, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Itsy */ + {MY_USB_DEVICE(0x3f0, 0x2101, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Calypso */ + {MY_USB_DEVICE(0x4dd, 0x8001, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Iris */ + {MY_USB_DEVICE(0x4dd, 0x8002, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Collie */ + {MY_USB_DEVICE(0x4dd, 0x8003, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Collie */ + {MY_USB_DEVICE(0x4dd, 0x8004, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Collie */ + {MY_USB_DEVICE(0x5f9, 0xffff, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, /* Sharp tmp */ + /* extra null entry for module vendor/produc parameters */ + {MY_USB_DEVICE(0, 0, CDC_DEVICE_CLASS, LINEO_INTERFACE_CLASS, LINEO_INTERFACE_SUBCLASS_SAFESERIAL)}, + {} /* terminating entry */ }; -MODULE_DEVICE_TABLE (usb, id_table); +MODULE_DEVICE_TABLE(usb, id_table); static struct usb_driver safe_driver = { .name = "safe_serial", @@ -156,29 +159,45 @@ static struct usb_driver safe_driver = { }; static const __u16 crc10_table[256] = { - 0x000, 0x233, 0x255, 0x066, 0x299, 0x0aa, 0x0cc, 0x2ff, 0x301, 0x132, 0x154, 0x367, 0x198, 0x3ab, 0x3cd, 0x1fe, - 0x031, 0x202, 0x264, 0x057, 0x2a8, 0x09b, 0x0fd, 0x2ce, 0x330, 0x103, 0x165, 0x356, 0x1a9, 0x39a, 0x3fc, 0x1cf, - 0x062, 0x251, 0x237, 0x004, 0x2fb, 0x0c8, 0x0ae, 0x29d, 0x363, 0x150, 0x136, 0x305, 0x1fa, 0x3c9, 0x3af, 0x19c, - 0x053, 0x260, 0x206, 0x035, 0x2ca, 0x0f9, 0x09f, 0x2ac, 0x352, 0x161, 0x107, 0x334, 0x1cb, 0x3f8, 0x39e, 0x1ad, - 0x0c4, 0x2f7, 0x291, 0x0a2, 0x25d, 0x06e, 0x008, 0x23b, 0x3c5, 0x1f6, 0x190, 0x3a3, 0x15c, 0x36f, 0x309, 0x13a, - 0x0f5, 0x2c6, 0x2a0, 0x093, 0x26c, 0x05f, 0x039, 0x20a, 0x3f4, 0x1c7, 0x1a1, 0x392, 0x16d, 0x35e, 0x338, 0x10b, - 0x0a6, 0x295, 0x2f3, 0x0c0, 0x23f, 0x00c, 0x06a, 0x259, 0x3a7, 0x194, 0x1f2, 0x3c1, 0x13e, 0x30d, 0x36b, 0x158, - 0x097, 0x2a4, 0x2c2, 0x0f1, 0x20e, 0x03d, 0x05b, 0x268, 0x396, 0x1a5, 0x1c3, 0x3f0, 0x10f, 0x33c, 0x35a, 0x169, - 0x188, 0x3bb, 0x3dd, 0x1ee, 0x311, 0x122, 0x144, 0x377, 0x289, 0x0ba, 0x0dc, 0x2ef, 0x010, 0x223, 0x245, 0x076, - 0x1b9, 0x38a, 0x3ec, 0x1df, 0x320, 0x113, 0x175, 0x346, 0x2b8, 0x08b, 0x0ed, 0x2de, 0x021, 0x212, 0x274, 0x047, - 0x1ea, 0x3d9, 0x3bf, 0x18c, 0x373, 0x140, 0x126, 0x315, 0x2eb, 0x0d8, 0x0be, 0x28d, 0x072, 0x241, 0x227, 0x014, - 0x1db, 0x3e8, 0x38e, 0x1bd, 0x342, 0x171, 0x117, 0x324, 0x2da, 0x0e9, 0x08f, 0x2bc, 0x043, 0x270, 0x216, 0x025, - 0x14c, 0x37f, 0x319, 0x12a, 0x3d5, 0x1e6, 0x180, 0x3b3, 0x24d, 0x07e, 0x018, 0x22b, 0x0d4, 0x2e7, 0x281, 0x0b2, - 0x17d, 0x34e, 0x328, 0x11b, 0x3e4, 0x1d7, 0x1b1, 0x382, 0x27c, 0x04f, 0x029, 0x21a, 0x0e5, 0x2d6, 0x2b0, 0x083, - 0x12e, 0x31d, 0x37b, 0x148, 0x3b7, 0x184, 0x1e2, 0x3d1, 0x22f, 0x01c, 0x07a, 0x249, 0x0b6, 0x285, 0x2e3, 0x0d0, - 0x11f, 0x32c, 0x34a, 0x179, 0x386, 0x1b5, 0x1d3, 0x3e0, 0x21e, 0x02d, 0x04b, 0x278, 0x087, 0x2b4, 0x2d2, 0x0e1, + 0x000, 0x233, 0x255, 0x066, 0x299, 0x0aa, 0x0cc, 0x2ff, + 0x301, 0x132, 0x154, 0x367, 0x198, 0x3ab, 0x3cd, 0x1fe, + 0x031, 0x202, 0x264, 0x057, 0x2a8, 0x09b, 0x0fd, 0x2ce, + 0x330, 0x103, 0x165, 0x356, 0x1a9, 0x39a, 0x3fc, 0x1cf, + 0x062, 0x251, 0x237, 0x004, 0x2fb, 0x0c8, 0x0ae, 0x29d, + 0x363, 0x150, 0x136, 0x305, 0x1fa, 0x3c9, 0x3af, 0x19c, + 0x053, 0x260, 0x206, 0x035, 0x2ca, 0x0f9, 0x09f, 0x2ac, + 0x352, 0x161, 0x107, 0x334, 0x1cb, 0x3f8, 0x39e, 0x1ad, + 0x0c4, 0x2f7, 0x291, 0x0a2, 0x25d, 0x06e, 0x008, 0x23b, + 0x3c5, 0x1f6, 0x190, 0x3a3, 0x15c, 0x36f, 0x309, 0x13a, + 0x0f5, 0x2c6, 0x2a0, 0x093, 0x26c, 0x05f, 0x039, 0x20a, + 0x3f4, 0x1c7, 0x1a1, 0x392, 0x16d, 0x35e, 0x338, 0x10b, + 0x0a6, 0x295, 0x2f3, 0x0c0, 0x23f, 0x00c, 0x06a, 0x259, + 0x3a7, 0x194, 0x1f2, 0x3c1, 0x13e, 0x30d, 0x36b, 0x158, + 0x097, 0x2a4, 0x2c2, 0x0f1, 0x20e, 0x03d, 0x05b, 0x268, + 0x396, 0x1a5, 0x1c3, 0x3f0, 0x10f, 0x33c, 0x35a, 0x169, + 0x188, 0x3bb, 0x3dd, 0x1ee, 0x311, 0x122, 0x144, 0x377, + 0x289, 0x0ba, 0x0dc, 0x2ef, 0x010, 0x223, 0x245, 0x076, + 0x1b9, 0x38a, 0x3ec, 0x1df, 0x320, 0x113, 0x175, 0x346, + 0x2b8, 0x08b, 0x0ed, 0x2de, 0x021, 0x212, 0x274, 0x047, + 0x1ea, 0x3d9, 0x3bf, 0x18c, 0x373, 0x140, 0x126, 0x315, + 0x2eb, 0x0d8, 0x0be, 0x28d, 0x072, 0x241, 0x227, 0x014, + 0x1db, 0x3e8, 0x38e, 0x1bd, 0x342, 0x171, 0x117, 0x324, + 0x2da, 0x0e9, 0x08f, 0x2bc, 0x043, 0x270, 0x216, 0x025, + 0x14c, 0x37f, 0x319, 0x12a, 0x3d5, 0x1e6, 0x180, 0x3b3, + 0x24d, 0x07e, 0x018, 0x22b, 0x0d4, 0x2e7, 0x281, 0x0b2, + 0x17d, 0x34e, 0x328, 0x11b, 0x3e4, 0x1d7, 0x1b1, 0x382, + 0x27c, 0x04f, 0x029, 0x21a, 0x0e5, 0x2d6, 0x2b0, 0x083, + 0x12e, 0x31d, 0x37b, 0x148, 0x3b7, 0x184, 0x1e2, 0x3d1, + 0x22f, 0x01c, 0x07a, 0x249, 0x0b6, 0x285, 0x2e3, 0x0d0, + 0x11f, 0x32c, 0x34a, 0x179, 0x386, 0x1b5, 0x1d3, 0x3e0, + 0x21e, 0x02d, 0x04b, 0x278, 0x087, 0x2b4, 0x2d2, 0x0e1, }; -#define CRC10_INITFCS 0x000 // Initial FCS value -#define CRC10_GOODFCS 0x000 // Good final FCS value -#define CRC10_FCS(fcs, c) ( (((fcs) << 8) & 0x3ff) ^ crc10_table[((fcs) >> 2) & 0xff] ^ (c)) +#define CRC10_INITFCS 0x000 /* Initial FCS value */ +#define CRC10_GOODFCS 0x000 /* Good final FCS value */ +#define CRC10_FCS(fcs, c) ((((fcs) << 8) & 0x3ff) ^ crc10_table[((fcs) >> 2) & 0xff] ^ (c)) -/** +/** * fcs_compute10 - memcpy and calculate 10 bit CRC across buffer * @sp: pointer to buffer * @len: number of bytes @@ -187,13 +206,13 @@ static const __u16 crc10_table[256] = { * Perform a memcpy and calculate fcs using ppp 10bit CRC algorithm. Return * new 10 bit FCS. */ -static __u16 __inline__ fcs_compute10 (unsigned char *sp, int len, __u16 fcs) +static __u16 __inline__ fcs_compute10(unsigned char *sp, int len, __u16 fcs) { - for (; len-- > 0; fcs = CRC10_FCS (fcs, *sp++)); + for (; len-- > 0; fcs = CRC10_FCS(fcs, *sp++)); return fcs; } -static void safe_read_bulk_callback (struct urb *urb) +static void safe_read_bulk_callback(struct urb *urb) { struct usb_serial_port *port = urb->context; unsigned char *data = urb->transfer_buffer; @@ -201,7 +220,7 @@ static void safe_read_bulk_callback (struct urb *urb) int result; int status = urb->status; - dbg ("%s", __func__); + dbg("%s", __func__); if (status) { dbg("%s - nonzero read bulk status received: %d", @@ -209,50 +228,55 @@ static void safe_read_bulk_callback (struct urb *urb) return; } - dbg ("safe_read_bulk_callback length: %d", port->read_urb->actual_length); + dbg("safe_read_bulk_callback length: %d", + port->read_urb->actual_length); #ifdef ECHO_RCV { int i; unsigned char *cp = port->read_urb->transfer_buffer; for (i = 0; i < port->read_urb->actual_length; i++) { - if ((i % 32) == 0) { - printk ("\nru[%02x] ", i); - } - printk ("%02x ", *cp++); + if ((i % 32) == 0) + printk("\nru[%02x] ", i); + printk("%02x ", *cp++); } - printk ("\n"); + printk("\n"); } #endif if (safe) { __u16 fcs; - if (!(fcs = fcs_compute10 (data, length, CRC10_INITFCS))) { + fcs = fcs_compute10(data, length, CRC10_INITFCS); + if (!fcs) { int actual_length = data[length - 2] >> 2; if (actual_length <= (length - 2)) { - info ("%s - actual: %d", __func__, actual_length); - tty_insert_flip_string(port->port.tty, data, actual_length); - tty_flip_buffer_push (port->port.tty); + info("%s - actual: %d", __func__, + actual_length); + tty_insert_flip_string(port->port.tty, + data, actual_length); + tty_flip_buffer_push(port->port.tty); } else { - err ("%s - inconsistent lengths %d:%d", __func__, - actual_length, length); + err("%s - inconsistent lengths %d:%d", + __func__, actual_length, length); } } else { - err ("%s - bad CRC %x", __func__, fcs); + err("%s - bad CRC %x", __func__, fcs); } } else { tty_insert_flip_string(port->port.tty, data, length); - tty_flip_buffer_push (port->port.tty); + tty_flip_buffer_push(port->port.tty); } /* Continue trying to always read */ - usb_fill_bulk_urb (urb, port->serial->dev, - usb_rcvbulkpipe (port->serial->dev, port->bulk_in_endpointAddress), - urb->transfer_buffer, urb->transfer_buffer_length, - safe_read_bulk_callback, port); - - if ((result = usb_submit_urb (urb, GFP_ATOMIC))) { - err ("%s - failed resubmitting read urb, error %d", __func__, result); + usb_fill_bulk_urb(urb, port->serial->dev, + usb_rcvbulkpipe(port->serial->dev, + port->bulk_in_endpointAddress), + urb->transfer_buffer, urb->transfer_buffer_length, + safe_read_bulk_callback, port); + + result = usb_submit_urb(urb, GFP_ATOMIC); + if (result) + err("%s - failed resubmitting read urb, error %d", + __func__, result); /* FIXME: Need a mechanism to retry later if this happens */ - } } static int safe_write(struct tty_struct *tty, struct usb_serial_port *port, @@ -263,23 +287,23 @@ static int safe_write(struct tty_struct *tty, struct usb_serial_port *port, int i; int packet_length; - dbg ("safe_write port: %p %d urb: %p count: %d", port, port->number, port->write_urb, - count); + dbg("safe_write port: %p %d urb: %p count: %d", + port, port->number, port->write_urb, count); if (!port->write_urb) { - dbg ("%s - write urb NULL", __func__); + dbg("%s - write urb NULL", __func__); return 0; } - dbg ("safe_write write_urb: %d transfer_buffer_length", + dbg("safe_write write_urb: %d transfer_buffer_length", port->write_urb->transfer_buffer_length); if (!port->write_urb->transfer_buffer_length) { - dbg ("%s - write urb transfer_buffer_length zero", __func__); + dbg("%s - write urb transfer_buffer_length zero", __func__); return 0; } if (count == 0) { - dbg ("%s - write request of 0 bytes", __func__); + dbg("%s - write request of 0 bytes", __func__); return 0; } spin_lock_bh(&port->lock); @@ -291,63 +315,64 @@ static int safe_write(struct tty_struct *tty, struct usb_serial_port *port, port->write_urb_busy = 1; spin_unlock_bh(&port->lock); - packet_length = port->bulk_out_size; // get max packetsize + packet_length = port->bulk_out_size; /* get max packetsize */ - i = packet_length - (safe ? 2 : 0); // get bytes to send + i = packet_length - (safe ? 2 : 0); /* get bytes to send */ count = (count > i) ? i : count; - // get the data into the transfer buffer + /* get the data into the transfer buffer */ data = port->write_urb->transfer_buffer; - memset (data, '0', packet_length); + memset(data, '0', packet_length); - memcpy (data, buf, count); + memcpy(data, buf, count); if (safe) { __u16 fcs; - // pad if necessary - if (!padded) { + /* pad if necessary */ + if (!padded) packet_length = count + 2; - } - // set count + /* set count */ data[packet_length - 2] = count << 2; data[packet_length - 1] = 0; - // compute fcs and insert into trailer - fcs = fcs_compute10 (data, packet_length, CRC10_INITFCS); + /* compute fcs and insert into trailer */ + fcs = fcs_compute10(data, packet_length, CRC10_INITFCS); data[packet_length - 2] |= fcs >> 8; data[packet_length - 1] |= fcs & 0xff; - // set length to send + /* set length to send */ port->write_urb->transfer_buffer_length = packet_length; } else { port->write_urb->transfer_buffer_length = count; } - usb_serial_debug_data(debug, &port->dev, __func__, count, port->write_urb->transfer_buffer); + usb_serial_debug_data(debug, &port->dev, __func__, count, + port->write_urb->transfer_buffer); #ifdef ECHO_TX { int i; unsigned char *cp = port->write_urb->transfer_buffer; for (i = 0; i < port->write_urb->transfer_buffer_length; i++) { - if ((i % 32) == 0) { - printk ("\nsu[%02x] ", i); - } - printk ("%02x ", *cp++); + if ((i % 32) == 0) + printk("\nsu[%02x] ", i); + printk("%02x ", *cp++); } - printk ("\n"); + printk("\n"); } #endif port->write_urb->dev = port->serial->dev; - if ((result = usb_submit_urb (port->write_urb, GFP_KERNEL))) { + result = usb_submit_urb(port->write_urb, GFP_KERNEL); + if (result) { port->write_urb_busy = 0; - err ("%s - failed submitting write urb, error %d", __func__, result); + err("%s - failed submitting write urb, error %d", + __func__, result); return 0; } - dbg ("%s urb: %p submitted", __func__, port->write_urb); + dbg("%s urb: %p submitted", __func__, port->write_urb); - return (count); + return count; } static int safe_write_room(struct tty_struct *tty) @@ -356,21 +381,19 @@ static int safe_write_room(struct tty_struct *tty) int room = 0; /* Default: no room */ unsigned long flags; - dbg ("%s", __func__); + dbg("%s", __func__); spin_lock_irqsave(&port->lock, flags); if (port->write_urb_busy) room = port->bulk_out_size - (safe ? 2 : 0); spin_unlock_irqrestore(&port->lock, flags); - if (room) { - dbg ("safe_write_room returns %d", room); - } - + if (room) + dbg("safe_write_room returns %d", room); return room; } -static int safe_startup (struct usb_serial *serial) +static int safe_startup(struct usb_serial *serial) { switch (serial->interface->cur_altsetting->desc.bInterfaceProtocol) { case LINEO_SAFESERIAL_CRC: @@ -398,17 +421,18 @@ static struct usb_serial_driver safe_device = { .attach = safe_startup, }; -static int __init safe_init (void) +static int __init safe_init(void) { int i, retval; - info (DRIVER_VERSION " " DRIVER_AUTHOR); - info (DRIVER_DESC); - info ("vendor: %x product: %x safe: %d padded: %d\n", vendor, product, safe, padded); + info(DRIVER_VERSION " " DRIVER_AUTHOR); + info(DRIVER_DESC); + info("vendor: %x product: %x safe: %d padded: %d\n", + vendor, product, safe, padded); - // if we have vendor / product parameters patch them into id list + /* if we have vendor / product parameters patch them into id list */ if (vendor || product) { - info ("vendor: %x product: %x\n", vendor, product); + info("vendor: %x product: %x\n", vendor, product); for (i = 0; i < ARRAY_SIZE(id_table); i++) { if (!id_table[i].idVendor && !id_table[i].idProduct) { @@ -433,11 +457,11 @@ failed_usb_serial_register: return retval; } -static void __exit safe_exit (void) +static void __exit safe_exit(void) { - usb_deregister (&safe_driver); - usb_serial_deregister (&safe_device); + usb_deregister(&safe_driver); + usb_serial_deregister(&safe_device); } -module_init (safe_init); -module_exit (safe_exit); +module_init(safe_init); +module_exit(safe_exit); |