diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-21 08:26:12 +0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-21 08:26:12 +0400 |
commit | 7a9b149212f3716c598afe973b6261fd58453b7a (patch) | |
tree | 477716d84c71da124448b72278e98da28aadbd3d /drivers/usb/serial/kl5kusb105.c | |
parent | 3d62e3fdce8ef265a3706c52ae1ca6ab84e30f0e (diff) | |
parent | e26bcf37234c67624f62d9fc95f922b8dbda1363 (diff) | |
download | linux-7a9b149212f3716c598afe973b6261fd58453b7a.tar.xz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (229 commits)
USB: remove unused usb_buffer_alloc and usb_buffer_free macros
usb: musb: update gfp/slab.h includes
USB: ftdi_sio: fix legacy SIO-device header
USB: kl5usb105: reimplement using generic framework
USB: kl5usb105: minor clean ups
USB: kl5usb105: fix memory leak
USB: io_ti: use kfifo to implement write buffering
USB: io_ti: remove unsused private counter
USB: ti_usb: use kfifo to implement write buffering
USB: ir-usb: fix incorrect write-buffer length
USB: aircable: fix incorrect write-buffer length
USB: safe_serial: straighten out read processing
USB: safe_serial: reimplement read using generic framework
USB: safe_serial: reimplement write using generic framework
usb-storage: always print quirks
USB: usb-storage: trivial debug improvements
USB: oti6858: use port write fifo
USB: oti6858: use kfifo to implement write buffering
USB: cypress_m8: use kfifo to implement write buffering
USB: cypress_m8: remove unused drain define
...
Fix up conflicts (due to usb_buffer_alloc/free renaming) in
drivers/input/tablet/acecad.c
drivers/input/tablet/kbtab.c
drivers/input/tablet/wacom_sys.c
drivers/media/video/gspca/gspca.c
sound/usb/usbaudio.c
Diffstat (limited to 'drivers/usb/serial/kl5kusb105.c')
-rw-r--r-- | drivers/usb/serial/kl5kusb105.c | 436 |
1 files changed, 69 insertions, 367 deletions
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c index 8eef91ba4b1c..cdbe8bf7f674 100644 --- a/drivers/usb/serial/kl5kusb105.c +++ b/drivers/usb/serial/kl5kusb105.c @@ -1,6 +1,7 @@ /* * KLSI KL5KUSB105 chip RS232 converter driver * + * Copyright (C) 2010 Johan Hovold <jhovold@gmail.com> * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de> * * This program is free software; you can redistribute it and/or modify @@ -34,17 +35,6 @@ * implement handshaking or decide that we do not support it */ -/* History: - * 0.3a - implemented pools of write URBs - * 0.3 - alpha version for public testing - * 0.2 - TIOCMGET works, so autopilot(1) can be used! - * 0.1 - can be used to do pilot-xfer -p /dev/ttyUSB0 -l - * - * The driver skeleton is mainly based on mct_u232.c and various other - * pieces of code shamelessly copied from the drivers/usb/serial/ directory. - */ - - #include <linux/kernel.h> #include <linux/errno.h> #include <linux/init.h> @@ -64,8 +54,8 @@ static int debug; /* * Version Information */ -#define DRIVER_VERSION "v0.3a" -#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>" +#define DRIVER_VERSION "v0.4" +#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>" #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" @@ -73,23 +63,17 @@ static int debug; * Function prototypes */ static int klsi_105_startup(struct usb_serial *serial); -static void klsi_105_disconnect(struct usb_serial *serial); static void klsi_105_release(struct usb_serial *serial); static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port); static void klsi_105_close(struct usb_serial_port *port); -static int klsi_105_write(struct tty_struct *tty, - struct usb_serial_port *port, const unsigned char *buf, int count); -static void klsi_105_write_bulk_callback(struct urb *urb); -static int klsi_105_chars_in_buffer(struct tty_struct *tty); -static int klsi_105_write_room(struct tty_struct *tty); -static void klsi_105_read_bulk_callback(struct urb *urb); static void klsi_105_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old); -static void klsi_105_throttle(struct tty_struct *tty); -static void klsi_105_unthrottle(struct tty_struct *tty); static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file); static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); +static void klsi_105_process_read_urb(struct urb *urb); +static int klsi_105_prepare_write_buffer(struct usb_serial_port *port, + void *dest, size_t size); /* * All of the device info needed for the KLSI converters. @@ -107,7 +91,7 @@ static struct usb_driver kl5kusb105d_driver = { .probe = usb_serial_probe, .disconnect = usb_serial_disconnect, .id_table = id_table, - .no_dynamic_id = 1, + .no_dynamic_id = 1, }; static struct usb_serial_driver kl5kusb105d_device = { @@ -115,26 +99,23 @@ static struct usb_serial_driver kl5kusb105d_device = { .owner = THIS_MODULE, .name = "kl5kusb105d", }, - .description = "KL5KUSB105D / PalmConnect", - .usb_driver = &kl5kusb105d_driver, - .id_table = id_table, - .num_ports = 1, - .open = klsi_105_open, - .close = klsi_105_close, - .write = klsi_105_write, - .write_bulk_callback = klsi_105_write_bulk_callback, - .chars_in_buffer = klsi_105_chars_in_buffer, - .write_room = klsi_105_write_room, - .read_bulk_callback = klsi_105_read_bulk_callback, - .set_termios = klsi_105_set_termios, - /*.break_ctl = klsi_105_break_ctl,*/ - .tiocmget = klsi_105_tiocmget, - .tiocmset = klsi_105_tiocmset, - .attach = klsi_105_startup, - .disconnect = klsi_105_disconnect, - .release = klsi_105_release, - .throttle = klsi_105_throttle, - .unthrottle = klsi_105_unthrottle, + .description = "KL5KUSB105D / PalmConnect", + .usb_driver = &kl5kusb105d_driver, + .id_table = id_table, + .num_ports = 1, + .bulk_out_size = 64, + .open = klsi_105_open, + .close = klsi_105_close, + .set_termios = klsi_105_set_termios, + /*.break_ctl = klsi_105_break_ctl,*/ + .tiocmget = klsi_105_tiocmget, + .tiocmset = klsi_105_tiocmset, + .attach = klsi_105_startup, + .release = klsi_105_release, + .throttle = usb_serial_generic_throttle, + .unthrottle = usb_serial_generic_unthrottle, + .process_read_urb = klsi_105_process_read_urb, + .prepare_write_buffer = klsi_105_prepare_write_buffer, }; struct klsi_105_port_settings { @@ -145,18 +126,11 @@ struct klsi_105_port_settings { __u8 unknown2; } __attribute__ ((packed)); -/* we implement a pool of NUM_URBS urbs per usb_serial */ -#define NUM_URBS 1 -#define URB_TRANSFER_BUFFER_SIZE 64 struct klsi_105_private { struct klsi_105_port_settings cfg; struct ktermios termios; unsigned long line_state; /* modem line settings */ - /* write pool */ - struct urb *write_urb_pool[NUM_URBS]; spinlock_t lock; - unsigned long bytes_in; - unsigned long bytes_out; }; @@ -189,7 +163,7 @@ static int klsi_105_chg_port_settings(struct usb_serial_port *port, settings->pktlen, settings->baudrate, settings->databits, settings->unknown1, settings->unknown2); return rc; -} /* klsi_105_chg_port_settings */ +} /* translate a 16-bit status value from the device to linux's TIO bits */ static unsigned long klsi_105_status2linestate(const __u16 status) @@ -202,6 +176,7 @@ static unsigned long klsi_105_status2linestate(const __u16 status) return res; } + /* * Read line control via vendor command and return result through * *line_state_p @@ -258,7 +233,7 @@ static int klsi_105_get_line_state(struct usb_serial_port *port, static int klsi_105_startup(struct usb_serial *serial) { struct klsi_105_private *priv; - int i, j; + int i; /* check if we support the product id (see keyspan.c) * FIXME @@ -282,29 +257,9 @@ static int klsi_105_startup(struct usb_serial *serial) priv->line_state = 0; - priv->bytes_in = 0; - priv->bytes_out = 0; usb_set_serial_port_data(serial->port[i], priv); spin_lock_init(&priv->lock); - for (j = 0; j < NUM_URBS; j++) { - struct urb *urb = usb_alloc_urb(0, GFP_KERNEL); - - priv->write_urb_pool[j] = urb; - if (urb == NULL) { - dev_err(&serial->dev->dev, "No more urbs???\n"); - goto err_cleanup; - } - - urb->transfer_buffer = - kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); - if (!urb->transfer_buffer) { - dev_err(&serial->dev->dev, - "%s - out of memory for urb buffers.\n", - __func__); - goto err_cleanup; - } - } /* priv->termios is left uninitalized until port opening */ init_waitqueue_head(&serial->port[i]->write_wait); @@ -315,44 +270,11 @@ static int klsi_105_startup(struct usb_serial *serial) err_cleanup: for (; i >= 0; i--) { priv = usb_get_serial_port_data(serial->port[i]); - for (j = 0; j < NUM_URBS; j++) { - if (priv->write_urb_pool[j]) { - kfree(priv->write_urb_pool[j]->transfer_buffer); - usb_free_urb(priv->write_urb_pool[j]); - } - } + kfree(priv); usb_set_serial_port_data(serial->port[i], NULL); } return -ENOMEM; -} /* klsi_105_startup */ - - -static void klsi_105_disconnect(struct usb_serial *serial) -{ - int i; - - dbg("%s", __func__); - - /* stop reads and writes on all ports */ - for (i = 0; i < serial->num_ports; ++i) { - struct klsi_105_private *priv = - usb_get_serial_port_data(serial->port[i]); - - if (priv) { - /* kill our write urb pool */ - int j; - struct urb **write_urbs = priv->write_urb_pool; - - for (j = 0; j < NUM_URBS; j++) { - if (write_urbs[j]) { - usb_kill_urb(write_urbs[j]); - usb_free_urb(write_urbs[j]); - } - } - } - } -} /* klsi_105_disconnect */ - +} static void klsi_105_release(struct usb_serial *serial) { @@ -360,13 +282,9 @@ static void klsi_105_release(struct usb_serial *serial) dbg("%s", __func__); - for (i = 0; i < serial->num_ports; ++i) { - struct klsi_105_private *priv = - usb_get_serial_port_data(serial->port[i]); - - kfree(priv); - } -} /* klsi_105_release */ + for (i = 0; i < serial->num_ports; ++i) + kfree(usb_get_serial_port_data(serial->port[i])); +} static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) { @@ -416,18 +334,8 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) spin_unlock_irqrestore(&priv->lock, flags); /* READ_ON and urb submission */ - usb_fill_bulk_urb(port->read_urb, port->serial->dev, - usb_rcvbulkpipe(port->serial->dev, - port->bulk_in_endpointAddress), - port->read_urb->transfer_buffer, - port->read_urb->transfer_buffer_length, - klsi_105_read_bulk_callback, - port); - - rc = usb_submit_urb(port->read_urb, GFP_KERNEL); + rc = usb_serial_generic_open(tty, port); if (rc) { - dev_err(&port->dev, "%s - failed submitting read urb, " - "error %d\n", __func__, rc); retval = rc; goto exit; } @@ -460,12 +368,10 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) exit: kfree(cfg); return retval; -} /* klsi_105_open */ - +} static void klsi_105_close(struct usb_serial_port *port) { - struct klsi_105_private *priv = usb_get_serial_port_data(port); int rc; dbg("%s port %d", __func__, port->number); @@ -488,239 +394,62 @@ static void klsi_105_close(struct usb_serial_port *port) mutex_unlock(&port->serial->disc_mutex); /* shutdown our bulk reads and writes */ - usb_kill_urb(port->write_urb); - usb_kill_urb(port->read_urb); - /* unlink our write pool */ - /* FIXME */ + usb_serial_generic_close(port); + /* wgg - do I need this? I think so. */ usb_kill_urb(port->interrupt_in_urb); - dev_info(&port->serial->dev->dev, - "port stats: %ld bytes in, %ld bytes out\n", - priv->bytes_in, priv->bytes_out); -} /* klsi_105_close */ - +} /* We need to write a complete 64-byte data block and encode the * number actually sent in the first double-byte, LSB-order. That * leaves at most 62 bytes of payload. */ -#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ - - -static int klsi_105_write(struct tty_struct *tty, - struct usb_serial_port *port, const unsigned char *buf, int count) +#define KLSI_HDR_LEN 2 +static int klsi_105_prepare_write_buffer(struct usb_serial_port *port, + void *dest, size_t size) { - struct klsi_105_private *priv = usb_get_serial_port_data(port); - int result, size; - int bytes_sent = 0; - - dbg("%s - port %d", __func__, port->number); - - while (count > 0) { - /* try to find a free urb (write 0 bytes if none) */ - struct urb *urb = NULL; - unsigned long flags; - int i; - /* since the pool is per-port we might not need - the spin lock !? */ - spin_lock_irqsave(&priv->lock, flags); - for (i = 0; i < NUM_URBS; i++) { - if (priv->write_urb_pool[i]->status != -EINPROGRESS) { - urb = priv->write_urb_pool[i]; - dbg("%s - using pool URB %d", __func__, i); - break; - } - } - spin_unlock_irqrestore(&priv->lock, flags); - - if (urb == NULL) { - dbg("%s - no more free urbs", __func__); - goto exit; - } - - if (urb->transfer_buffer == NULL) { - urb->transfer_buffer = - kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); - if (urb->transfer_buffer == NULL) { - dev_err(&port->dev, - "%s - no more kernel memory...\n", - __func__); - goto exit; - } - } - - size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET); - size = min(size, URB_TRANSFER_BUFFER_SIZE - - KLSI_105_DATA_OFFSET); - - memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); - - /* write payload size into transfer buffer */ - ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); - ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); - - /* set up our urb */ - usb_fill_bulk_urb(urb, port->serial->dev, - usb_sndbulkpipe(port->serial->dev, - port->bulk_out_endpointAddress), - urb->transfer_buffer, - URB_TRANSFER_BUFFER_SIZE, - klsi_105_write_bulk_callback, - port); - - /* send the data out the bulk port */ - result = usb_submit_urb(urb, GFP_ATOMIC); - if (result) { - dev_err(&port->dev, - "%s - failed submitting write urb, error %d\n", - __func__, result); - goto exit; - } - buf += size; - bytes_sent += size; - count -= size; - } -exit: - /* lockless, but it's for debug info only... */ - priv->bytes_out += bytes_sent; - - return bytes_sent; /* that's how much we wrote */ -} /* klsi_105_write */ - -static void klsi_105_write_bulk_callback(struct urb *urb) -{ - struct usb_serial_port *port = urb->context; - int status = urb->status; - - dbg("%s - port %d", __func__, port->number); - - if (status) { - dbg("%s - nonzero write bulk status received: %d", __func__, - status); - return; - } + unsigned char *buf = dest; + int count; - usb_serial_port_softint(port); -} /* klsi_105_write_bulk_completion_callback */ + count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size, + &port->lock); + put_unaligned_le16(count, buf); - -/* return number of characters currently in the writing process */ -static int klsi_105_chars_in_buffer(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - int chars = 0; - int i; - unsigned long flags; - struct klsi_105_private *priv = usb_get_serial_port_data(port); - - spin_lock_irqsave(&priv->lock, flags); - - for (i = 0; i < NUM_URBS; ++i) { - if (priv->write_urb_pool[i]->status == -EINPROGRESS) - chars += URB_TRANSFER_BUFFER_SIZE; - } - - spin_unlock_irqrestore(&priv->lock, flags); - - dbg("%s - returns %d", __func__, chars); - return chars; + return count + KLSI_HDR_LEN; } -static int klsi_105_write_room(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - unsigned long flags; - int i; - int room = 0; - struct klsi_105_private *priv = usb_get_serial_port_data(port); - - spin_lock_irqsave(&priv->lock, flags); - for (i = 0; i < NUM_URBS; ++i) { - if (priv->write_urb_pool[i]->status != -EINPROGRESS) - room += URB_TRANSFER_BUFFER_SIZE; - } - - spin_unlock_irqrestore(&priv->lock, flags); - - dbg("%s - returns %d", __func__, room); - return room; -} - - - -static void klsi_105_read_bulk_callback(struct urb *urb) +/* The data received is preceded by a length double-byte in LSB-first order. + */ +static void klsi_105_process_read_urb(struct urb *urb) { struct usb_serial_port *port = urb->context; - struct klsi_105_private *priv = usb_get_serial_port_data(port); - struct tty_struct *tty; unsigned char *data = urb->transfer_buffer; - int rc; - int status = urb->status; + struct tty_struct *tty; + unsigned len; - dbg("%s - port %d", __func__, port->number); + /* empty urbs seem to happen, we ignore them */ + if (!urb->actual_length) + return; - /* The urb might have been killed. */ - if (status) { - dbg("%s - nonzero read bulk status received: %d", __func__, - status); + if (urb->actual_length <= KLSI_HDR_LEN) { + dbg("%s - malformed packet", __func__); return; } - /* The data received is again preceded by a length double-byte in LSB- - * first order (see klsi_105_write() ) - */ - if (urb->actual_length == 0) { - /* empty urbs seem to happen, we ignore them */ - /* dbg("%s - emtpy URB", __func__); */ - ; - } else if (urb->actual_length <= 2) { - dbg("%s - size %d URB not understood", __func__, - urb->actual_length); - usb_serial_debug_data(debug, &port->dev, __func__, - urb->actual_length, data); - } else { - int bytes_sent = ((__u8 *) data)[0] + - ((unsigned int) ((__u8 *) data)[1] << 8); - tty = tty_port_tty_get(&port->port); - /* we should immediately resubmit the URB, before attempting - * to pass the data on to the tty layer. But that needs locking - * against re-entry an then mixed-up data because of - * intermixed tty_flip_buffer_push()s - * FIXME - */ - usb_serial_debug_data(debug, &port->dev, __func__, - urb->actual_length, data); - - if (bytes_sent + 2 > urb->actual_length) { - dbg("%s - trying to read more data than available" - " (%d vs. %d)", __func__, - bytes_sent+2, urb->actual_length); - /* cap at implied limit */ - bytes_sent = urb->actual_length - 2; - } - - tty_insert_flip_string(tty, data + 2, bytes_sent); - tty_flip_buffer_push(tty); - tty_kref_put(tty); + tty = tty_port_tty_get(&port->port); + if (!tty) + return; - /* again lockless, but debug info only */ - priv->bytes_in += bytes_sent; + len = get_unaligned_le16(data); + if (len > urb->actual_length - KLSI_HDR_LEN) { + dbg("%s - packet length mismatch", __func__); + len = urb->actual_length - KLSI_HDR_LEN; } - /* Continue trying to always read */ - usb_fill_bulk_urb(port->read_urb, port->serial->dev, - usb_rcvbulkpipe(port->serial->dev, - port->bulk_in_endpointAddress), - port->read_urb->transfer_buffer, - port->read_urb->transfer_buffer_length, - klsi_105_read_bulk_callback, - port); - rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); - if (rc) - dev_err(&port->dev, - "%s - failed resubmitting read urb, error %d\n", - __func__, rc); -} /* klsi_105_read_bulk_callback */ + tty_insert_flip_string(tty, data + KLSI_HDR_LEN, len); + tty_flip_buffer_push(tty); + tty_kref_put(tty); +} static void klsi_105_set_termios(struct tty_struct *tty, struct usb_serial_port *port, @@ -887,8 +616,7 @@ static void klsi_105_set_termios(struct tty_struct *tty, klsi_105_chg_port_settings(port, cfg); err: kfree(cfg); -} /* klsi_105_set_termios */ - +} #if 0 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) @@ -906,7 +634,7 @@ static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) lcr |= MCT_U232_SET_BREAK; mct_u232_set_line_ctrl(serial, lcr); -} /* mct_u232_break_ctl */ +} #endif static int klsi_105_tiocmget(struct tty_struct *tty, struct file *file) @@ -962,29 +690,6 @@ static int klsi_105_tiocmset(struct tty_struct *tty, struct file *file, return retval; } -static void klsi_105_throttle(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - dbg("%s - port %d", __func__, port->number); - usb_kill_urb(port->read_urb); -} - -static void klsi_105_unthrottle(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - int result; - - dbg("%s - port %d", __func__, port->number); - - port->read_urb->dev = port->serial->dev; - result = usb_submit_urb(port->read_urb, GFP_KERNEL); - if (result) - dev_err(&port->dev, - "%s - failed submitting read urb, error %d\n", - __func__, result); -} - - static int __init klsi_105_init(void) { @@ -1005,7 +710,6 @@ failed_usb_serial_register: return retval; } - static void __exit klsi_105_exit(void) { usb_deregister(&kl5kusb105d_driver); @@ -1023,5 +727,3 @@ MODULE_LICENSE("GPL"); module_param(debug, bool, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "enable extensive debugging messages"); - -/* vim: set sts=8 ts=8 sw=8: */ |