S: Odd Fixes
F: drivers/staging/ft1000/
-STAGING - FRONTIER TRANZPORT AND ALPHATRACK
-M: David Täht <d@teklibre.com>
-S: Odd Fixes
-F: drivers/staging/frontier/
-
STAGING - GO7007 MPEG CODEC
M: Hans Verkuil <hans.verkuil@cisco.com>
S: Maintained
source "drivers/staging/rts5208/Kconfig"
-source "drivers/staging/frontier/Kconfig"
-
source "drivers/staging/phison/Kconfig"
source "drivers/staging/line6/Kconfig"
obj-$(CONFIG_R8723AU) += rtl8723au/
obj-$(CONFIG_R8821AE) += rtl8821ae/
obj-$(CONFIG_RTS5208) += rts5208/
-obj-$(CONFIG_TRANZPORT) += frontier/
obj-$(CONFIG_IDE_PHISON) += phison/
obj-$(CONFIG_LINE6_USB) += line6/
obj-$(CONFIG_NETLOGIC_XLR_NET) += netlogic/
+++ /dev/null
-config TRANZPORT
- tristate "Frontier Tranzport and Alphatrack support"
- depends on USB
- ---help---
- Enable support for the Frontier Tranzport and Alphatrack devices.
+++ /dev/null
-obj-$(CONFIG_TRANZPORT) += tranzport.o
-obj-$(CONFIG_TRANZPORT) += alphatrack.o
+++ /dev/null
-This directory contains the Linux USB Tranzport and Alphatrack Kernel drivers.
-
-See http://www.frontierdesign.com for details on these devices.
-
-Userspace test code is available from
-
-git://toutatis.isc.org/home/d/src/git/frontier.git
-
-At present the tranzport does reads/writes of 8 byte cmds to
-/dev/tranzport0 to control the lights, screen, and wheel.
-
-At present the alphatrack accepts reads/writes of 12 byte cmds to
-/dev/tranzport0 to control the lights, screen, fader and touchpad.
-
-The tranzport driver provides a rudimentary sysfs interface for the status of
-the device and a writable parameter for turning wheel compression on and off.
-
-The API is nothing more than the USB commands issued to the device. Why?
-
-The control wheel/fader can generate events far too quickly for
-a typical userspace application to keep up with them via libusb. Input
-needs to be 100% accurate and fast in order for the alphatrack or tranzport
-to be useful.
-
-UIO would be useful except that usb disconnect events need
-to be handled correctly.
-
-A sysfs interface is perfect for simple userspace apps to do fun things with
-the lights and screen. But it's fairly lousy for handling input events and
-very lousy for watching the state of the shuttle wheel.
-
-A linux input events interface is great for the input events and shuttle wheel.
-* It's theoretically OK on LEDs.
-* A fader can be mapped to an absolute mouse device.
-* But there is no LCD support at all, or fader feedback support in that API
-
-So, thus, these stubby drivers exist.
-
-In the end this could be driven by a midi layer, which handles all those
-cases via a well defined API, but - among other things - is slow, doesn't do
-flow control, and is a LOT of extra work, none of which is required at
-the kernel level (probably). Frankly, I'd like to keep the
-core driver simple because the only realtime work really required is
-the bottom half interrupt handler and the output overlapping.
-
-Exposing some sort of clean api to userspace would be perfect. What that
-API looks like? Gah. beats me.
+++ /dev/null
-TODO:
- - checkpatch.pl clean
- - sparse clean
- - fix userspace interface to be sane
- - possibly just port to userspace with libusb
- - review by the USB developer community
-
-Please send any patches for this driver to Greg Kroah-Hartman <greg@kroah.com>
-and David Taht <d@teklibre.com>.
+++ /dev/null
-/*
- * Frontier Designs Alphatrack driver
- *
- * Copyright (C) 2007 Michael Taht (m@taht.net)
- *
- * Based on the usbled driver and ldusb drivers by
- *
- * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2005 Michael Hund <mhund@ld-didactic.de>
- *
- * The ldusb driver was, in turn, derived from Lego USB Tower driver
- * Copyright (C) 2003 David Glance <advidgsf@sourceforge.net>
- * 2001-2004 Juergen Stuber <starblue@users.sourceforge.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, version 2.
- *
- */
-
-/**
- * This driver uses a ring buffer for time critical reading of
- * interrupt in reports and provides read and write methods for
- * raw interrupt reports.
- */
-
-/*
- * Note: this currently uses a dumb ringbuffer for reads and writes.
- * A more optimal driver would cache and kill off outstanding urbs that are
- * now invalid, and ignore ones that already were in the queue but valid
- * as we only have 30 commands for the alphatrack. In particular this is
- * key for getting lights to flash in time as otherwise many commands
- * can be buffered up before the light change makes it to the interface.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/kobject.h>
-#include <linux/mutex.h>
-
-#include <linux/uaccess.h>
-#include <linux/input.h>
-#include <linux/usb.h>
-#include <linux/poll.h>
-
-#include "alphatrack.h"
-
-#define VENDOR_ID 0x165b
-#define PRODUCT_ID 0xfad1
-
-#ifdef CONFIG_USB_DYNAMIC_MINORS
-#define USB_ALPHATRACK_MINOR_BASE 0
-#else
-/* FIXME 176 - is another driver's minor - apply for that */
-#define USB_ALPHATRACK_MINOR_BASE 176
-#endif
-
-/* table of devices that work with this driver */
-static const struct usb_device_id usb_alphatrack_table[] = {
- {USB_DEVICE(VENDOR_ID, PRODUCT_ID)},
- {} /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, usb_alphatrack_table);
-MODULE_VERSION("0.41");
-MODULE_AUTHOR("Mike Taht <m@taht.net>");
-MODULE_DESCRIPTION("Alphatrack USB Driver");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("Frontier Designs Alphatrack Control Surface");
-
-/* These aren't done yet */
-
-#define SUPPRESS_EXTRA_ONLINE_EVENTS 0
-#define BUFFERED_WRITES 0
-#define SUPPRESS_EXTRA_OFFLINE_EVENTS 0
-#define COMPRESS_FADER_EVENTS 0
-
-#define BUFFERED_READS 1
-#define RING_BUFFER_SIZE 512
-#define WRITE_BUFFER_SIZE 34
-#define ALPHATRACK_USB_TIMEOUT 10
-#define OUTPUT_CMD_SIZE 8
-#define INPUT_CMD_SIZE 12
-#define ALPHATRACK_DEBUG 0
-
-static int debug = ALPHATRACK_DEBUG;
-
-/* Use our own dbg macro */
-#define dbg_info(dev, format, arg...) do \
- { if (debug) dev_info(dev , format , ## arg); } while (0)
-
-#define alphatrack_ocmd_info(dev, cmd, format, arg...)
-
-#define alphatrack_icmd_info(dev, cmd, format, arg...)
-
-/* Module parameters */
-
-module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug enabled or not");
-
-/*
- * All interrupt in transfers are collected in a ring buffer to
- * avoid racing conditions and get better performance of the driver.
- */
-
-static int ring_buffer_size = RING_BUFFER_SIZE;
-
-module_param(ring_buffer_size, int, S_IRUGO);
-MODULE_PARM_DESC(ring_buffer_size, "Read ring buffer size");
-
-/* The write_buffer can one day contain more than one interrupt out transfer.*/
-
-static int write_buffer_size = WRITE_BUFFER_SIZE;
-module_param(write_buffer_size, int, S_IRUGO);
-MODULE_PARM_DESC(write_buffer_size, "Write buffer size");
-
-/*
- * Increase the interval for debugging purposes.
- * or set to 1 to use the standard interval from the endpoint descriptors.
- */
-
-static int min_interrupt_in_interval = ALPHATRACK_USB_TIMEOUT;
-module_param(min_interrupt_in_interval, int, 0);
-MODULE_PARM_DESC(min_interrupt_in_interval,
- "Minimum interrupt in interval in ms");
-
-static int min_interrupt_out_interval = ALPHATRACK_USB_TIMEOUT;
-module_param(min_interrupt_out_interval, int, 0);
-MODULE_PARM_DESC(min_interrupt_out_interval,
- "Minimum interrupt out interval in ms");
-
-/* Structure to hold all of our device specific stuff */
-
-struct usb_alphatrack {
- struct mutex mtx; /* locks this structure */
- struct usb_interface *intf; /* save off the usb interface pointer */
- int open_count; /* number of times this port has been opened */
-
- /* make gcc happy */
- struct alphatrack_icmd (*ring_buffer)[RING_BUFFER_SIZE];
- struct alphatrack_ocmd (*write_buffer)[WRITE_BUFFER_SIZE];
- unsigned int ring_head;
- unsigned int ring_tail;
-
- wait_queue_head_t read_wait;
- wait_queue_head_t write_wait;
-
- unsigned char *interrupt_in_buffer;
- unsigned char *oldi_buffer;
- struct usb_endpoint_descriptor *interrupt_in_endpoint;
- struct urb *interrupt_in_urb;
- int interrupt_in_interval;
- size_t interrupt_in_endpoint_size;
- int interrupt_in_running;
- int interrupt_in_done;
-
- char *interrupt_out_buffer;
- struct usb_endpoint_descriptor *interrupt_out_endpoint;
- struct urb *interrupt_out_urb;
- int interrupt_out_interval;
- size_t interrupt_out_endpoint_size;
- int interrupt_out_busy;
-
- atomic_t writes_pending;
- int event; /* alternate interface to events */
- int fader; /* 10 bits */
- int lights; /* 23 bits */
- unsigned char dump_state; /* 0 if disabled 1 if enabled */
- unsigned char enable; /* 0 if disabled 1 if enabled */
- unsigned char offline; /* if the device is out of range or asleep */
- unsigned char verbose; /* be verbose in error reporting */
- unsigned char last_cmd[OUTPUT_CMD_SIZE];
- unsigned char screen[32];
-};
-
-/* prevent races between open() and disconnect() */
-static DEFINE_MUTEX(disconnect_mutex);
-
-/* forward declaration */
-
-static struct usb_driver usb_alphatrack_driver;
-
-/**
- * usb_alphatrack_abort_transfers
- * aborts transfers and frees associated data structures
- */
-static void usb_alphatrack_abort_transfers(struct usb_alphatrack *dev)
-{
- /* shutdown transfer */
- if (dev->interrupt_in_running) {
- dev->interrupt_in_running = 0;
- if (dev->intf)
- usb_kill_urb(dev->interrupt_in_urb);
- }
- if (dev->interrupt_out_busy)
- if (dev->intf)
- usb_kill_urb(dev->interrupt_out_urb);
-}
-
-/** usb_alphatrack_delete */
-static void usb_alphatrack_delete(struct usb_alphatrack *dev)
-{
- usb_alphatrack_abort_transfers(dev);
- usb_free_urb(dev->interrupt_in_urb);
- usb_free_urb(dev->interrupt_out_urb);
- kfree(dev->ring_buffer);
- kfree(dev->interrupt_in_buffer);
- kfree(dev->interrupt_out_buffer);
- kfree(dev->oldi_buffer);
- kfree(dev->write_buffer);
- kfree(dev);
-}
-
-/** usb_alphatrack_interrupt_in_callback */
-
-static void usb_alphatrack_interrupt_in_callback(struct urb *urb)
-{
- struct usb_alphatrack *dev = urb->context;
- unsigned int next_ring_head;
- int retval = -1;
-
- if (urb->status) {
- if (urb->status == -ENOENT ||
- urb->status == -ECONNRESET || urb->status == -ESHUTDOWN) {
- goto exit;
- } else {
- dbg_info(&dev->intf->dev,
- "%s: nonzero status received: %d\n", __func__,
- urb->status);
- goto resubmit; /* maybe we can recover */
- }
- }
-
- if (urb->actual_length != INPUT_CMD_SIZE) {
- dev_warn(&dev->intf->dev,
- "Urb length was %d bytes!! Do something intelligent\n",
- urb->actual_length);
- } else {
- alphatrack_ocmd_info(&dev->intf->dev,
- &(*dev->ring_buffer)[dev->ring_tail].cmd,
- "%s", "bla");
- if (memcmp
- (dev->interrupt_in_buffer, dev->oldi_buffer,
- INPUT_CMD_SIZE) == 0) {
- goto resubmit;
- }
- memcpy(dev->oldi_buffer, dev->interrupt_in_buffer,
- INPUT_CMD_SIZE);
-
-#if SUPPRESS_EXTRA_OFFLINE_EVENTS
- if (dev->offline == 2 && dev->interrupt_in_buffer[1] == 0xff)
- goto resubmit;
- if (dev->offline == 1 && dev->interrupt_in_buffer[1] == 0xff) {
- dev->offline = 2;
- goto resubmit;
- }
-/* Always pass one offline event up the stack */
- if (dev->offline > 0 && dev->interrupt_in_buffer[1] != 0xff)
- dev->offline = 0;
- if (dev->offline == 0 && dev->interrupt_in_buffer[1] == 0xff)
- dev->offline = 1;
-#endif
- dbg_info(&dev->intf->dev, "%s: head, tail are %x, %x\n",
- __func__, dev->ring_head, dev->ring_tail);
- next_ring_head = (dev->ring_head + 1) % ring_buffer_size;
-
- if (next_ring_head != dev->ring_tail) {
- memcpy(&((*dev->ring_buffer)[dev->ring_head]),
- dev->interrupt_in_buffer, urb->actual_length);
- dev->ring_head = next_ring_head;
- retval = 0;
- memset(dev->interrupt_in_buffer, 0, urb->actual_length);
- } else {
- dev_warn(&dev->intf->dev,
- "Ring buffer overflow, %d bytes dropped\n",
- urb->actual_length);
- memset(dev->interrupt_in_buffer, 0, urb->actual_length);
- }
- }
-
-resubmit:
- /* resubmit if we're still running */
- if (dev->interrupt_in_running && dev->intf) {
- retval = usb_submit_urb(dev->interrupt_in_urb, GFP_ATOMIC);
- if (retval)
- dev_err(&dev->intf->dev,
- "usb_submit_urb failed (%d)\n", retval);
- }
-
-exit:
- dev->interrupt_in_done = 1;
- wake_up_interruptible(&dev->read_wait);
-}
-
-/** usb_alphatrack_interrupt_out_callback */
-static void usb_alphatrack_interrupt_out_callback(struct urb *urb)
-{
- struct usb_alphatrack *dev = urb->context;
-
- /* sync/async unlink faults aren't errors */
- if (urb->status && !(urb->status == -ENOENT ||
- urb->status == -ECONNRESET ||
- urb->status == -ESHUTDOWN))
- dbg_info(&dev->intf->dev,
- "%s - nonzero write interrupt status received: %d\n",
- __func__, urb->status);
- atomic_dec(&dev->writes_pending);
- dev->interrupt_out_busy = 0;
- wake_up_interruptible(&dev->write_wait);
-}
-
-/** usb_alphatrack_open */
-static int usb_alphatrack_open(struct inode *inode, struct file *file)
-{
- struct usb_alphatrack *dev;
- int subminor;
- int retval = 0;
- struct usb_interface *interface;
-
- nonseekable_open(inode, file);
- subminor = iminor(inode);
-
- mutex_lock(&disconnect_mutex);
-
- interface = usb_find_interface(&usb_alphatrack_driver, subminor);
-
- if (!interface) {
- pr_err("%s - error, can't find device for minor %d\n",
- __func__, subminor);
- retval = -ENODEV;
- goto unlock_disconnect_exit;
- }
-
- dev = usb_get_intfdata(interface);
-
- if (!dev) {
- retval = -ENODEV;
- goto unlock_disconnect_exit;
- }
-
- /* lock this device */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto unlock_disconnect_exit;
- }
-
- /* allow opening only once */
- if (dev->open_count) {
- retval = -EBUSY;
- goto unlock_exit;
- }
- dev->open_count = 1;
-
- /* initialize in direction */
- dev->ring_head = 0;
- dev->ring_tail = 0;
- usb_fill_int_urb(dev->interrupt_in_urb,
- interface_to_usbdev(interface),
- usb_rcvintpipe(interface_to_usbdev(interface),
- dev->interrupt_in_endpoint->
- bEndpointAddress),
- dev->interrupt_in_buffer,
- dev->interrupt_in_endpoint_size,
- usb_alphatrack_interrupt_in_callback, dev,
- dev->interrupt_in_interval);
-
- dev->interrupt_in_running = 1;
- dev->interrupt_in_done = 0;
- dev->enable = 1;
- dev->offline = 0;
-
- retval = usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
- if (retval) {
- dev_err(&interface->dev,
- "Couldn't submit interrupt_in_urb %d\n", retval);
- dev->interrupt_in_running = 0;
- dev->open_count = 0;
- goto unlock_exit;
- }
-
- /* save device in the file's private structure */
- file->private_data = dev;
-
-unlock_exit:
- mutex_unlock(&dev->mtx);
-
-unlock_disconnect_exit:
- mutex_unlock(&disconnect_mutex);
-
- return retval;
-}
-
-/** usb_alphatrack_release */
-static int usb_alphatrack_release(struct inode *inode, struct file *file)
-{
- struct usb_alphatrack *dev;
- int retval = 0;
-
- dev = file->private_data;
-
- if (dev == NULL) {
- retval = -ENODEV;
- goto exit;
- }
-
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
-
- if (dev->open_count != 1) {
- retval = -ENODEV;
- goto unlock_exit;
- }
-
- if (dev->intf == NULL) {
- /* the device was unplugged before the file was released */
- mutex_unlock(&dev->mtx);
- /* unlock here as usb_alphatrack_delete frees dev */
- usb_alphatrack_delete(dev);
- retval = -ENODEV;
- goto exit;
- }
-
- /* wait until write transfer is finished */
- if (dev->interrupt_out_busy)
- wait_event_interruptible_timeout(dev->write_wait,
- !dev->interrupt_out_busy,
- 2 * HZ);
- usb_alphatrack_abort_transfers(dev);
- dev->open_count = 0;
-
-unlock_exit:
- mutex_unlock(&dev->mtx);
-
-exit:
- return retval;
-}
-
-/** usb_alphatrack_poll */
-static unsigned int usb_alphatrack_poll(struct file *file, poll_table *wait)
-{
- struct usb_alphatrack *dev;
- unsigned int mask = 0;
-
- dev = file->private_data;
-
- poll_wait(file, &dev->read_wait, wait);
- poll_wait(file, &dev->write_wait, wait);
-
- if (dev->ring_head != dev->ring_tail)
- mask |= POLLIN | POLLRDNORM;
- if (!dev->interrupt_out_busy)
- mask |= POLLOUT | POLLWRNORM;
-
- return mask;
-}
-
-/** usb_alphatrack_read */
-static ssize_t usb_alphatrack_read(struct file *file, char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct usb_alphatrack *dev;
- int retval = 0;
-
- int c = 0;
-
- dev = file->private_data;
-
- /* verify that we actually have some data to read */
- if (count == 0)
- goto exit;
-
- /* lock this object */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
-
- /* verify that the device wasn't unplugged */
- if (dev->intf == NULL) {
- retval = -ENODEV;
- pr_err("%s: No device or device unplugged %d\n",
- __func__, retval);
- goto unlock_exit;
- }
-
- while (dev->ring_head == dev->ring_tail) {
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- goto unlock_exit;
- }
- dev->interrupt_in_done = 0;
- retval =
- wait_event_interruptible(dev->read_wait,
- dev->interrupt_in_done);
- if (retval < 0)
- goto unlock_exit;
- }
-
- alphatrack_ocmd_info(&dev->intf->dev,
- &(*dev->ring_buffer)[dev->ring_tail].cmd, "%s",
- ": copying to userspace");
-
- c = 0;
- while ((c < count) && (dev->ring_tail != dev->ring_head)) {
- if (copy_to_user
- (&buffer[c], &(*dev->ring_buffer)[dev->ring_tail],
- INPUT_CMD_SIZE)) {
- retval = -EFAULT;
- goto unlock_exit;
- }
- dev->ring_tail = (dev->ring_tail + 1) % ring_buffer_size;
- c += INPUT_CMD_SIZE;
- dbg_info(&dev->intf->dev, "%s: head, tail are %x, %x\n",
- __func__, dev->ring_head, dev->ring_tail);
- }
- retval = c;
-
-unlock_exit:
- /* unlock the device */
- mutex_unlock(&dev->mtx);
-
-exit:
- return retval;
-}
-
-/** usb_alphatrack_write */
-static ssize_t usb_alphatrack_write(struct file *file,
- const char __user *buffer, size_t count,
- loff_t *ppos)
-{
- struct usb_alphatrack *dev;
- size_t bytes_to_write;
- int retval = 0;
-
- dev = file->private_data;
-
- /* verify that we actually have some data to write */
- if (count == 0)
- goto exit;
-
- /* lock this object */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
-
- /* verify that the device wasn't unplugged */
- if (dev->intf == NULL) {
- retval = -ENODEV;
- pr_err("%s: No device or device unplugged %d\n",
- __func__, retval);
- goto unlock_exit;
- }
-
- /* wait until previous transfer is finished */
- if (dev->interrupt_out_busy) {
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- goto unlock_exit;
- }
- retval =
- wait_event_interruptible(dev->write_wait,
- !dev->interrupt_out_busy);
- if (retval < 0)
- goto unlock_exit;
- }
-
- /* write the data into interrupt_out_buffer from userspace */
- /* FIXME - if you write more than 12 bytes this breaks */
- bytes_to_write =
- min(count, write_buffer_size * dev->interrupt_out_endpoint_size);
- if (bytes_to_write < count)
- dev_warn(&dev->intf->dev,
- "Write buffer overflow, %zd bytes dropped\n",
- count - bytes_to_write);
-
- dbg_info(&dev->intf->dev, "%s: count = %zd, bytes_to_write = %zd\n",
- __func__, count, bytes_to_write);
-
- if (copy_from_user(dev->interrupt_out_buffer, buffer, bytes_to_write)) {
- retval = -EFAULT;
- goto unlock_exit;
- }
-
- if (dev->interrupt_out_endpoint == NULL) {
- dev_err(&dev->intf->dev, "Endpoint should not be null!\n");
- goto unlock_exit;
- }
-
- /* send off the urb */
- usb_fill_int_urb(dev->interrupt_out_urb,
- interface_to_usbdev(dev->intf),
- usb_sndintpipe(interface_to_usbdev(dev->intf),
- dev->interrupt_out_endpoint->
- bEndpointAddress),
- dev->interrupt_out_buffer, bytes_to_write,
- usb_alphatrack_interrupt_out_callback, dev,
- dev->interrupt_out_interval);
- dev->interrupt_out_busy = 1;
- atomic_inc(&dev->writes_pending);
- wmb();
-
- retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);
- if (retval) {
- dev->interrupt_out_busy = 0;
- dev_err(&dev->intf->dev,
- "Couldn't submit interrupt_out_urb %d\n", retval);
- atomic_dec(&dev->writes_pending);
- goto unlock_exit;
- }
- retval = bytes_to_write;
-
-unlock_exit:
- /* unlock the device */
- mutex_unlock(&dev->mtx);
-
-exit:
- return retval;
-}
-
-/* file operations needed when we register this driver */
-static const struct file_operations usb_alphatrack_fops = {
- .owner = THIS_MODULE,
- .read = usb_alphatrack_read,
- .write = usb_alphatrack_write,
- .open = usb_alphatrack_open,
- .release = usb_alphatrack_release,
- .poll = usb_alphatrack_poll,
- .llseek = no_llseek,
-};
-
-/*
- * usb class driver info in order to get a minor number from the usb core,
- * and to have the device registered with the driver core
- */
-
-static struct usb_class_driver usb_alphatrack_class = {
- .name = "alphatrack%d",
- .fops = &usb_alphatrack_fops,
- .minor_base = USB_ALPHATRACK_MINOR_BASE,
-};
-
-/**
- * usb_alphatrack_probe
- *
- * Called by the usb core when a new device is connected that it thinks
- * this driver might be interested in.
- */
-static int usb_alphatrack_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct usb_device *udev = interface_to_usbdev(intf);
- struct usb_alphatrack *dev = NULL;
- struct usb_host_interface *iface_desc;
- struct usb_endpoint_descriptor *endpoint;
- int i;
- int true_size;
- int retval = -ENOMEM;
-
- /* allocate memory for our device state and initialize it */
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (dev == NULL)
- goto exit;
-
- mutex_init(&dev->mtx);
- dev->intf = intf;
- init_waitqueue_head(&dev->read_wait);
- init_waitqueue_head(&dev->write_wait);
-
- iface_desc = intf->cur_altsetting;
-
- /* set up the endpoint information */
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
- endpoint = &iface_desc->endpoint[i].desc;
-
- if (usb_endpoint_is_int_in(endpoint))
- dev->interrupt_in_endpoint = endpoint;
-
- if (usb_endpoint_is_int_out(endpoint))
- dev->interrupt_out_endpoint = endpoint;
- }
- if (dev->interrupt_in_endpoint == NULL) {
- dev_err(&intf->dev, "Interrupt in endpoint not found\n");
- goto error;
- }
- if (dev->interrupt_out_endpoint == NULL)
- dev_warn(&intf->dev,
- "Interrupt out endpoint not found (using control endpoint instead)\n");
-
- dev->interrupt_in_endpoint_size =
- le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
-
- if (dev->interrupt_in_endpoint_size != 64)
- dev_warn(&intf->dev, "Interrupt in endpoint size is not 64!\n");
-
- if (ring_buffer_size == 0)
- ring_buffer_size = RING_BUFFER_SIZE;
-
- true_size = min(ring_buffer_size, RING_BUFFER_SIZE);
-
- /*
- * FIXME - there are more usb_alloc routines for dma correctness.
- * Needed?
- */
- dev->ring_buffer = kmalloc_array(true_size,
- sizeof(struct alphatrack_icmd),
- GFP_KERNEL);
- if (!dev->ring_buffer)
- goto error;
-
- dev->interrupt_in_buffer = kmalloc(dev->interrupt_in_endpoint_size,
- GFP_KERNEL);
- if (!dev->interrupt_in_buffer)
- goto error;
-
- dev->oldi_buffer = kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
- if (!dev->oldi_buffer)
- goto error;
-
- dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!dev->interrupt_in_urb) {
- dev_err(&intf->dev, "Couldn't allocate interrupt_in_urb\n");
- goto error;
- }
-
- dev->interrupt_out_endpoint_size =
- dev->interrupt_out_endpoint ? le16_to_cpu(dev->
- interrupt_out_endpoint->
- wMaxPacketSize) : udev->
- descriptor.bMaxPacketSize0;
-
- if (dev->interrupt_out_endpoint_size != 64)
- dev_warn(&intf->dev,
- "Interrupt out endpoint size is not 64!)\n");
-
- if (write_buffer_size == 0)
- write_buffer_size = WRITE_BUFFER_SIZE;
- true_size = min(write_buffer_size, WRITE_BUFFER_SIZE);
-
- dev->interrupt_out_buffer =
- kmalloc_array(true_size,
- dev->interrupt_out_endpoint_size,
- GFP_KERNEL);
- if (!dev->interrupt_out_buffer)
- goto error;
-
- dev->write_buffer = kmalloc_array(true_size,
- sizeof(struct alphatrack_ocmd),
- GFP_KERNEL);
- if (!dev->write_buffer)
- goto error;
-
- dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!dev->interrupt_out_urb) {
- dev_err(&intf->dev, "Couldn't allocate interrupt_out_urb\n");
- goto error;
- }
- dev->interrupt_in_interval =
- min_interrupt_in_interval >
- dev->interrupt_in_endpoint->
- bInterval ? min_interrupt_in_interval : dev->interrupt_in_endpoint->
- bInterval;
- if (dev->interrupt_out_endpoint)
- dev->interrupt_out_interval =
- min_interrupt_out_interval >
- dev->interrupt_out_endpoint->
- bInterval ? min_interrupt_out_interval : dev->
- interrupt_out_endpoint->bInterval;
-
- /* we can register the device now, as it is ready */
- usb_set_intfdata(intf, dev);
-
- atomic_set(&dev->writes_pending, 0);
- retval = usb_register_dev(intf, &usb_alphatrack_class);
- if (retval) {
- /* something prevented us from registering this driver */
- dev_err(&intf->dev,
- "Not able to get a minor for this device.\n");
- usb_set_intfdata(intf, NULL);
- goto error;
- }
-
- /* let the user know what node this device is now attached to */
- dev_info(&intf->dev,
- "Alphatrack Device #%d now attached to major %d minor %d\n",
- (intf->minor - USB_ALPHATRACK_MINOR_BASE), USB_MAJOR,
- intf->minor);
-
-exit:
- return retval;
-
-error:
- usb_alphatrack_delete(dev);
-
- return retval;
-}
-
-/**
- * usb_alphatrack_disconnect
- *
- * Called by the usb core when the device is removed from the system.
- */
-static void usb_alphatrack_disconnect(struct usb_interface *intf)
-{
- struct usb_alphatrack *dev;
- int minor;
-
- mutex_lock(&disconnect_mutex);
-
- dev = usb_get_intfdata(intf);
- usb_set_intfdata(intf, NULL);
-
- mutex_lock(&dev->mtx);
-
- minor = intf->minor;
-
- /* give back our minor */
- usb_deregister_dev(intf, &usb_alphatrack_class);
-
- /* if the device is not opened, then we clean up right now */
- if (!dev->open_count) {
- mutex_unlock(&dev->mtx);
- usb_alphatrack_delete(dev);
- } else {
- atomic_set(&dev->writes_pending, 0);
- dev->intf = NULL;
- mutex_unlock(&dev->mtx);
- }
-
- mutex_unlock(&disconnect_mutex);
-
- dev_info(&intf->dev, "Alphatrack Surface #%d now disconnected\n",
- (minor - USB_ALPHATRACK_MINOR_BASE));
-}
-
-/* usb specific object needed to register this driver with the usb subsystem */
-static struct usb_driver usb_alphatrack_driver = {
- .name = "alphatrack",
- .probe = usb_alphatrack_probe,
- .disconnect = usb_alphatrack_disconnect,
- .id_table = usb_alphatrack_table,
-};
-
-module_usb_driver(usb_alphatrack_driver);
+++ /dev/null
-struct alphatrack_icmd {
- unsigned char cmd[12];
-};
-
-struct alphatrack_ocmd {
- unsigned char cmd[8];
-};
-
-/*
- * These are unused by the present driver but provide documentation for the
- * userspace API.
- */
-enum LightID {
- LIGHT_EQ = 0,
- LIGHT_OUT,
- LIGHT_F2,
- LIGHT_SEND,
- LIGHT_IN,
- LIGHT_F1,
- LIGHT_PAN,
- LIGHT_UNDEF1,
- LIGHT_UNDEF2,
- LIGHT_SHIFT,
- LIGHT_TRACKMUTE,
- LIGHT_TRACKSOLO,
- LIGHT_TRACKREC,
- LIGHT_READ,
- LIGHT_WRITE,
- LIGHT_ANYSOLO,
- LIGHT_AUTO,
- LIGHT_F4,
- LIGHT_RECORD,
- LIGHT_WINDOW,
- LIGHT_PLUGIN,
- LIGHT_F3,
- LIGHT_LOOP
-};
-
-#define BUTTONMASK_BATTERY 0x00004000
-#define BUTTONMASK_BACKLIGHT 0x00008000
-#define BUTTONMASK_FASTFORWARD 0x04000000
-#define BUTTONMASK_TRACKMUTE 0x00040000
-#define BUTTONMASK_TRACKSOLO 0x00800000
-#define BUTTONMASK_TRACKLEFT 0x80000000
-#define BUTTONMASK_RECORD 0x02000000
-#define BUTTONMASK_SHIFT 0x20000000
-#define BUTTONMASK_PUNCH 0x00800000
-#define BUTTONMASK_TRACKRIGHT 0x00020000
-#define BUTTONMASK_REWIND 0x01000000
-#define BUTTONMASK_STOP 0x10000000
-#define BUTTONMASK_LOOP 0x00010000
-#define BUTTONMASK_TRACKREC 0x00001000
-#define BUTTONMASK_PLAY 0x08000000
-#define BUTTONMASK_TOUCH1 0x00000008
-#define BUTTONMASK_TOUCH2 0x00000010
-#define BUTTONMASK_TOUCH3 0x00000020
-
-#define BUTTONMASK_PRESS1 0x00000009
-#define BUTTONMASK_PRESS2 0x00008010
-#define BUTTONMASK_PRESS3 0x00002020
-
-/*
- * last 3 bytes are the slider position
- * 40 is the actual slider moving, the most sig bits, and 3 lsb
- */
-
-#define BUTTONMASK_FLIP 0x40000000
-#define BUTTONMASK_F1 0x00100000
-#define BUTTONMASK_F2 0x00400000
-#define BUTTONMASK_F3 0x00200000
-#define BUTTONMASK_F4 0x00080000
-#define BUTTONMASK_PAN 0x00000200
-#define BUTTONMASK_SEND 0x00000800
-#define BUTTONMASK_EQ 0x00004000
-#define BUTTONMASK_PLUGIN 0x00000400
-#define BUTTONMASK_AUTO 0x00000100
-
-/* #define BUTTONMASK_FOOTSWITCH FIXME */
+++ /dev/null
-/*
- * Frontier Designs Tranzport driver
- *
- * Copyright (C) 2007 Michael Taht (m@taht.net)
- *
- * Based on the usbled driver and ldusb drivers by
- *
- * Copyright (C) 2004 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (C) 2005 Michael Hund <mhund@ld-didactic.de>
- *
- * The ldusb driver was, in turn, derived from Lego USB Tower driver
- * Copyright (C) 2003 David Glance <advidgsf@sourceforge.net>
- * 2001-2004 Juergen Stuber <starblue@users.sourceforge.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, version 2.
- *
- */
-
-/*
- * This driver uses a ring buffer for time critical reading of
- * interrupt in reports and provides read and write methods for
- * raw interrupt reports.
- */
-
-/* Note: this currently uses a dumb ringbuffer for reads and writes.
- * A more optimal driver would cache and kill off outstanding urbs that are
- * now invalid, and ignore ones that already were in the queue but valid
- * as we only have 17 commands for the tranzport. In particular this is
- * key for getting lights to flash in time as otherwise many commands
- * can be buffered up before the light change makes it to the interface.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-
-#include <linux/uaccess.h>
-#include <linux/input.h>
-#include <linux/usb.h>
-#include <linux/poll.h>
-
-/* Define these values to match your devices */
-#define VENDOR_ID 0x165b
-#define PRODUCT_ID 0x8101
-
-#ifdef CONFIG_USB_DYNAMIC_MINORS
-#define USB_TRANZPORT_MINOR_BASE 0
-#else /* FIXME 177- is the another driver's minor - apply for a minor soon */
-#define USB_TRANZPORT_MINOR_BASE 177
-#endif
-
-/* table of devices that work with this driver */
-static const struct usb_device_id usb_tranzport_table[] = {
- {USB_DEVICE(VENDOR_ID, PRODUCT_ID)},
- {} /* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE(usb, usb_tranzport_table);
-MODULE_VERSION("0.35");
-MODULE_AUTHOR("Mike Taht <m@taht.net>");
-MODULE_DESCRIPTION("Tranzport USB Driver");
-MODULE_LICENSE("GPL");
-MODULE_SUPPORTED_DEVICE("Frontier Designs Tranzport Control Surface");
-
-#define SUPPRESS_EXTRA_OFFLINE_EVENTS 1
-#define COMPRESS_WHEEL_EVENTS 1
-#define BUFFERED_READS 1
-#define RING_BUFFER_SIZE 1000
-#define WRITE_BUFFER_SIZE 34
-#define TRANZPORT_USB_TIMEOUT 10
-#define TRANZPORT_DEBUG 0
-
-static int debug = TRANZPORT_DEBUG;
-
-/* Use our own dbg macro */
-#define dbg_info(dev, format, arg...) do \
- { if (debug) dev_info(dev , format , ## arg); } while (0)
-
-/* Module parameters */
-
-module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Debug enabled or not");
-
-/*
- * All interrupt in transfers are collected in a ring buffer to
- * avoid racing conditions and get better performance of the driver.
- */
-
-static int ring_buffer_size = RING_BUFFER_SIZE;
-
-module_param(ring_buffer_size, int, S_IRUGO);
-MODULE_PARM_DESC(ring_buffer_size, "Read ring buffer size in reports");
-
-/*
- * The write_buffer can one day contain more than one interrupt out transfer.
- */
-static int write_buffer_size = WRITE_BUFFER_SIZE;
-module_param(write_buffer_size, int, S_IRUGO);
-MODULE_PARM_DESC(write_buffer_size, "Write buffer size");
-
-/*
- * Increase the interval for debugging purposes.
- * or set to 1 to use the standard interval from the endpoint descriptors.
- */
-
-static int min_interrupt_in_interval = TRANZPORT_USB_TIMEOUT;
-module_param(min_interrupt_in_interval, int, 0);
-MODULE_PARM_DESC(min_interrupt_in_interval,
- "Minimum interrupt in interval in ms");
-
-static int min_interrupt_out_interval = TRANZPORT_USB_TIMEOUT;
-module_param(min_interrupt_out_interval, int, 0);
-MODULE_PARM_DESC(min_interrupt_out_interval,
- "Minimum interrupt out interval in ms");
-
-struct tranzport_cmd {
- unsigned char cmd[8];
-};
-
-/* Structure to hold all of our device specific stuff */
-
-struct usb_tranzport {
- struct mutex mtx; /* locks this structure */
- struct usb_interface *intf; /* save off the usb interface pointer */
- int open_count; /* number of times this port opened */
- struct tranzport_cmd (*ring_buffer)[RING_BUFFER_SIZE];
- unsigned int ring_head;
- unsigned int ring_tail;
- wait_queue_head_t read_wait;
- wait_queue_head_t write_wait;
- unsigned char *interrupt_in_buffer;
- struct usb_endpoint_descriptor *interrupt_in_endpoint;
- struct urb *interrupt_in_urb;
- int interrupt_in_interval;
- size_t interrupt_in_endpoint_size;
- int interrupt_in_running;
- int interrupt_in_done;
- char *interrupt_out_buffer;
- struct usb_endpoint_descriptor *interrupt_out_endpoint;
- struct urb *interrupt_out_urb;
- int interrupt_out_interval;
- size_t interrupt_out_endpoint_size;
- int interrupt_out_busy;
-
- /* Sysfs support */
-
- unsigned char enable; /* 0 if disabled 1 if enabled */
- unsigned char offline; /* if the device is out of range or asleep */
- unsigned char compress_wheel; /* flag to compress wheel events */
-};
-
-/* prevent races between open() and disconnect() */
-static DEFINE_MUTEX(disconnect_mutex);
-
-static struct usb_driver usb_tranzport_driver;
-
-/**
- * usb_tranzport_abort_transfers
- * aborts transfers and frees associated data structures
- */
-static void usb_tranzport_abort_transfers(struct usb_tranzport *dev)
-{
- /* shutdown transfer */
- if (dev->interrupt_in_running) {
- dev->interrupt_in_running = 0;
- if (dev->intf)
- usb_kill_urb(dev->interrupt_in_urb);
- }
- if (dev->interrupt_out_busy)
- if (dev->intf)
- usb_kill_urb(dev->interrupt_out_urb);
-}
-
-#define show_int(value) \
- static ssize_t value##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
- { \
- struct usb_interface *intf = to_usb_interface(dev); \
- struct usb_tranzport *t = usb_get_intfdata(intf); \
- return sprintf(buf, "%d\n", t->value); \
- } \
- static DEVICE_ATTR_RO(value)
-
-#define show_set_int(value) \
- static ssize_t value##_show(struct device *dev, \
- struct device_attribute *attr, char *buf) \
- { \
- struct usb_interface *intf = to_usb_interface(dev); \
- struct usb_tranzport *t = usb_get_intfdata(intf); \
- return sprintf(buf, "%d\n", t->value); \
- } \
- static ssize_t value##_store(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t count) \
- { \
- struct usb_interface *intf = to_usb_interface(dev); \
- struct usb_tranzport *t = usb_get_intfdata(intf); \
- unsigned long temp; \
- if (kstrtoul(buf, 10, &temp)) \
- return -EINVAL; \
- t->value = temp; \
- return count; \
- } \
- static DEVICE_ATTR_RW(value)
-
-show_int(enable);
-show_int(offline);
-show_set_int(compress_wheel);
-
-/**
- * usb_tranzport_delete
- */
-static void usb_tranzport_delete(struct usb_tranzport *dev)
-{
- usb_tranzport_abort_transfers(dev);
- if (dev->intf != NULL) {
- device_remove_file(&dev->intf->dev, &dev_attr_enable);
- device_remove_file(&dev->intf->dev, &dev_attr_offline);
- device_remove_file(&dev->intf->dev, &dev_attr_compress_wheel);
- }
-
- /* free data structures */
- usb_free_urb(dev->interrupt_in_urb);
- usb_free_urb(dev->interrupt_out_urb);
- kfree(dev->ring_buffer);
- kfree(dev->interrupt_in_buffer);
- kfree(dev->interrupt_out_buffer);
- kfree(dev);
-}
-
-/**
- * usb_tranzport_interrupt_in_callback
- */
-
-static void usb_tranzport_interrupt_in_callback(struct urb *urb)
-{
- struct usb_tranzport *dev = urb->context;
- unsigned int next_ring_head;
- int retval = -1;
-
- if (urb->status) {
- if (urb->status == -ENOENT ||
- urb->status == -ECONNRESET ||
- urb->status == -ESHUTDOWN) {
- goto exit;
- } else {
- dbg_info(&dev->intf->dev,
- "%s: nonzero status received: %d\n",
- __func__, urb->status);
- goto resubmit; /* maybe we can recover */
- }
- }
-
- if (urb->actual_length != 8) {
- dev_warn(&dev->intf->dev,
- "Urb length was %d bytes!! Do something intelligent\n",
- urb->actual_length);
- } else {
- dbg_info(&dev->intf->dev,
- "%s: received: %02x%02x%02x%02x%02x%02x%02x%02x\n",
- __func__, dev->interrupt_in_buffer[0],
- dev->interrupt_in_buffer[1],
- dev->interrupt_in_buffer[2],
- dev->interrupt_in_buffer[3],
- dev->interrupt_in_buffer[4],
- dev->interrupt_in_buffer[5],
- dev->interrupt_in_buffer[6],
- dev->interrupt_in_buffer[7]);
-#if SUPPRESS_EXTRA_OFFLINE_EVENTS
- if (dev->offline == 2 && dev->interrupt_in_buffer[1] == 0xff)
- goto resubmit;
- if (dev->offline == 1 && dev->interrupt_in_buffer[1] == 0xff) {
- dev->offline = 2;
- goto resubmit;
- }
-
- /* Always pass one offline event up the stack */
- if (dev->offline > 0 && dev->interrupt_in_buffer[1] != 0xff)
- dev->offline = 0;
- if (dev->offline == 0 && dev->interrupt_in_buffer[1] == 0xff)
- dev->offline = 1;
-
-#endif /* SUPPRESS_EXTRA_OFFLINE_EVENTS */
- dbg_info(&dev->intf->dev, "%s: head, tail are %x, %x\n",
- __func__, dev->ring_head, dev->ring_tail);
-
- next_ring_head = (dev->ring_head + 1) % ring_buffer_size;
-
- if (next_ring_head != dev->ring_tail) {
- memcpy(&((*dev->ring_buffer)[dev->ring_head]),
- dev->interrupt_in_buffer, urb->actual_length);
- dev->ring_head = next_ring_head;
- retval = 0;
- memset(dev->interrupt_in_buffer, 0, urb->actual_length);
- } else {
- dev_warn(&dev->intf->dev,
- "Ring buffer overflow, %d bytes dropped\n",
- urb->actual_length);
- memset(dev->interrupt_in_buffer, 0, urb->actual_length);
- }
- }
-
-resubmit:
-/* resubmit if we're still running */
- if (dev->interrupt_in_running && dev->intf) {
- retval = usb_submit_urb(dev->interrupt_in_urb, GFP_ATOMIC);
- if (retval)
- dev_err(&dev->intf->dev,
- "usb_submit_urb failed (%d)\n", retval);
- }
-
-exit:
- dev->interrupt_in_done = 1;
- wake_up_interruptible(&dev->read_wait);
-}
-
-/**
- * usb_tranzport_interrupt_out_callback
- */
-static void usb_tranzport_interrupt_out_callback(struct urb *urb)
-{
- struct usb_tranzport *dev = urb->context;
- /* sync/async unlink faults aren't errors */
- if (urb->status && !(urb->status == -ENOENT ||
- urb->status == -ECONNRESET ||
- urb->status == -ESHUTDOWN))
- dbg_info(&dev->intf->dev,
- "%s - nonzero write interrupt status received: %d\n",
- __func__, urb->status);
-
- dev->interrupt_out_busy = 0;
- wake_up_interruptible(&dev->write_wait);
-}
-/**
- * usb_tranzport_open
- */
-static int usb_tranzport_open(struct inode *inode, struct file *file)
-{
- struct usb_tranzport *dev;
- int subminor;
- int retval = 0;
- struct usb_interface *interface;
-
- nonseekable_open(inode, file);
- subminor = iminor(inode);
-
- mutex_lock(&disconnect_mutex);
-
- interface = usb_find_interface(&usb_tranzport_driver, subminor);
-
- if (!interface) {
- pr_err("%s - error, can't find device for minor %d\n",
- __func__, subminor);
- retval = -ENODEV;
- goto unlock_disconnect_exit;
- }
-
- dev = usb_get_intfdata(interface);
-
- if (!dev) {
- retval = -ENODEV;
- goto unlock_disconnect_exit;
- }
-
- /* lock this device */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto unlock_disconnect_exit;
- }
-
- /* allow opening only once */
- if (dev->open_count) {
- retval = -EBUSY;
- goto unlock_exit;
- }
- dev->open_count = 1;
-
- /* initialize in direction */
- dev->ring_head = 0;
- dev->ring_tail = 0;
- usb_fill_int_urb(dev->interrupt_in_urb,
- interface_to_usbdev(interface),
- usb_rcvintpipe(interface_to_usbdev(interface),
- dev->interrupt_in_endpoint->
- bEndpointAddress),
- dev->interrupt_in_buffer,
- dev->interrupt_in_endpoint_size,
- usb_tranzport_interrupt_in_callback, dev,
- dev->interrupt_in_interval);
-
- dev->interrupt_in_running = 1;
- dev->interrupt_in_done = 0;
- dev->enable = 1;
- dev->offline = 0;
- dev->compress_wheel = 1;
-
- retval = usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
- if (retval) {
- dev_err(&interface->dev,
- "Couldn't submit interrupt_in_urb %d\n", retval);
- dev->interrupt_in_running = 0;
- dev->open_count = 0;
- goto unlock_exit;
- }
-
- /* save device in the file's private structure */
- file->private_data = dev;
-
-unlock_exit:
- mutex_unlock(&dev->mtx);
-
-unlock_disconnect_exit:
- mutex_unlock(&disconnect_mutex);
-
- return retval;
-}
-
-/**
- * usb_tranzport_release
- */
-static int usb_tranzport_release(struct inode *inode, struct file *file)
-{
- struct usb_tranzport *dev;
- int retval = 0;
-
- dev = file->private_data;
-
- if (dev == NULL) {
- retval = -ENODEV;
- goto exit;
- }
-
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
-
- if (dev->open_count != 1) {
- retval = -ENODEV;
- goto unlock_exit;
- }
-
- if (dev->intf == NULL) {
- /* the device was unplugged before the file was released */
- mutex_unlock(&dev->mtx);
- /* unlock here as usb_tranzport_delete frees dev */
- usb_tranzport_delete(dev);
- retval = -ENODEV;
- goto exit;
- }
-
- /* wait until write transfer is finished */
- if (dev->interrupt_out_busy)
- wait_event_interruptible_timeout(dev->write_wait,
- !dev->interrupt_out_busy,
- 2 * HZ);
- usb_tranzport_abort_transfers(dev);
- dev->open_count = 0;
-
-unlock_exit:
- mutex_unlock(&dev->mtx);
-
-exit:
- return retval;
-}
-
-/**
- * usb_tranzport_poll
- */
-static unsigned int usb_tranzport_poll(struct file *file, poll_table *wait)
-{
- struct usb_tranzport *dev;
- unsigned int mask = 0;
-
- dev = file->private_data;
- poll_wait(file, &dev->read_wait, wait);
- poll_wait(file, &dev->write_wait, wait);
- if (dev->ring_head != dev->ring_tail)
- mask |= POLLIN | POLLRDNORM;
- if (!dev->interrupt_out_busy)
- mask |= POLLOUT | POLLWRNORM;
- return mask;
-}
-/**
- * usb_tranzport_read
- */
-
-static ssize_t usb_tranzport_read(struct file *file, char __user *buffer,
- size_t count, loff_t *ppos)
-{
- struct usb_tranzport *dev;
- int retval = 0;
-#if BUFFERED_READS
- int c = 0;
-#endif
-#if COMPRESS_WHEEL_EVENTS
- signed char oldwheel;
- signed char newwheel;
- int cancompress = 1;
- int next_tail;
-#endif
-
- /* do I have such a thing as a null event? */
-
- dev = file->private_data;
-
- /* verify that we actually have some data to read */
- if (count == 0)
- goto exit;
-
- /* lock this object */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
-
- /* verify that the device wasn't unplugged */
- if (dev->intf == NULL) {
- retval = -ENODEV;
- pr_err("%s: No device or device unplugged %d\n",
- __func__, retval);
- goto unlock_exit;
- }
-
- while (dev->ring_head == dev->ring_tail) {
-
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- goto unlock_exit;
- }
- /* tiny race - FIXME: make atomic? */
- /* atomic_cmp_exchange(&dev->interrupt_in_done,0,0); */
- dev->interrupt_in_done = 0;
- retval = wait_event_interruptible(dev->read_wait,
- dev->interrupt_in_done);
- if (retval < 0)
- goto unlock_exit;
- }
-
- dbg_info(&dev->intf->dev,
- "%s: copying to userspace: %02x%02x%02x%02x%02x%02x%02x%02x\n",
- __func__,
- (*dev->ring_buffer)[dev->ring_tail].cmd[0],
- (*dev->ring_buffer)[dev->ring_tail].cmd[1],
- (*dev->ring_buffer)[dev->ring_tail].cmd[2],
- (*dev->ring_buffer)[dev->ring_tail].cmd[3],
- (*dev->ring_buffer)[dev->ring_tail].cmd[4],
- (*dev->ring_buffer)[dev->ring_tail].cmd[5],
- (*dev->ring_buffer)[dev->ring_tail].cmd[6],
- (*dev->ring_buffer)[dev->ring_tail].cmd[7]);
-
-#if BUFFERED_READS
- c = 0;
- while ((c < count) && (dev->ring_tail != dev->ring_head)) {
-
-#if COMPRESS_WHEEL_EVENTS
- next_tail = (dev->ring_tail+1) % ring_buffer_size;
- if (dev->compress_wheel)
- cancompress = 1;
- while (dev->ring_head != next_tail && cancompress == 1) {
- newwheel = (*dev->ring_buffer)[next_tail].cmd[6];
- oldwheel = (*dev->ring_buffer)[dev->ring_tail].cmd[6];
- /* if both are wheel events, and
- * no buttons have changes (FIXME, do I have to check?),
- * and we are the same sign, we can compress +- 7F
- */
- dbg_info(&dev->intf->dev,
- "%s: trying to compress: %02x%02x%02x%02x%02x%02x%02x%02x\n",
- __func__,
- (*dev->ring_buffer)[dev->ring_tail].cmd[0],
- (*dev->ring_buffer)[dev->ring_tail].cmd[1],
- (*dev->ring_buffer)[dev->ring_tail].cmd[2],
- (*dev->ring_buffer)[dev->ring_tail].cmd[3],
- (*dev->ring_buffer)[dev->ring_tail].cmd[4],
- (*dev->ring_buffer)[dev->ring_tail].cmd[5],
- (*dev->ring_buffer)[dev->ring_tail].cmd[6],
- (*dev->ring_buffer)[dev->ring_tail].cmd[7]);
-
- if (((*dev->ring_buffer)[dev->ring_tail].cmd[6] != 0 &&
- (*dev->ring_buffer)[next_tail].cmd[6] != 0) &&
- ((newwheel > 0 && oldwheel > 0) ||
- (newwheel < 0 && oldwheel < 0)) &&
- ((*dev->ring_buffer)[dev->ring_tail].cmd[2] ==
- (*dev->ring_buffer)[next_tail].cmd[2]) &&
- ((*dev->ring_buffer)[dev->ring_tail].cmd[3] ==
- (*dev->ring_buffer)[next_tail].cmd[3]) &&
- ((*dev->ring_buffer)[dev->ring_tail].cmd[4] ==
- (*dev->ring_buffer)[next_tail].cmd[4]) &&
- ((*dev->ring_buffer)[dev->ring_tail].cmd[5] ==
- (*dev->ring_buffer)[next_tail].cmd[5])) {
- dbg_info(&dev->intf->dev,
- "%s: should compress: "
- "%02x%02x%02x%02x%02x%02x%02x%02x\n",
- __func__,
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[0],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[1],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[2],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[3],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[4],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[5],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[6],
- (*dev->ring_buffer)[dev->ring_tail].
- cmd[7]);
- newwheel += oldwheel;
- if (oldwheel > 0 && !(newwheel > 0)) {
- newwheel = 0x7f;
- cancompress = 0;
- }
- if (oldwheel < 0 && !(newwheel < 0)) {
- newwheel = 0x80;
- cancompress = 0;
- }
-
- (*dev->ring_buffer)[next_tail].cmd[6] =
- newwheel;
- dev->ring_tail = next_tail;
- next_tail =
- (dev->ring_tail + 1) % ring_buffer_size;
- } else {
- cancompress = 0;
- }
- }
-#endif /* COMPRESS_WHEEL_EVENTS */
- if (copy_to_user(
- &buffer[c],
- &(*dev->ring_buffer)[dev->ring_tail], 8)) {
- retval = -EFAULT;
- goto unlock_exit;
- }
- dev->ring_tail = (dev->ring_tail + 1) % ring_buffer_size;
- c += 8;
- dbg_info(&dev->intf->dev,
- "%s: head, tail are %x, %x\n",
- __func__, dev->ring_head, dev->ring_tail);
- }
- retval = c;
-
-#else
-/* if (copy_to_user(buffer, &(*dev->ring_buffer)[dev->ring_tail], 8)) { */
- retval = -EFAULT;
- goto unlock_exit;
-}
-
-dev->ring_tail = (dev->ring_tail + 1) % ring_buffer_size;
-dbg_info(&dev->intf->dev, "%s: head, tail are %x, %x\n",
- __func__, dev->ring_head, dev->ring_tail);
-
-retval = 8;
-#endif /* BUFFERED_READS */
-
-unlock_exit:
-/* unlock the device */
-mutex_unlock(&dev->mtx);
-
-exit:
-return retval;
-}
-
-/**
- * usb_tranzport_write
- */
-static ssize_t usb_tranzport_write(struct file *file,
- const char __user *buffer, size_t count,
- loff_t *ppos)
-{
- struct usb_tranzport *dev;
- size_t bytes_to_write;
- int retval = 0;
-
- dev = file->private_data;
-
- /* verify that we actually have some data to write */
- if (count == 0)
- goto exit;
-
- /* lock this object */
- if (mutex_lock_interruptible(&dev->mtx)) {
- retval = -ERESTARTSYS;
- goto exit;
- }
- /* verify that the device wasn't unplugged */
- if (dev->intf == NULL) {
- retval = -ENODEV;
- pr_err("%s: No device or device unplugged %d\n",
- __func__, retval);
- goto unlock_exit;
- }
-
- /* wait until previous transfer is finished */
- if (dev->interrupt_out_busy) {
- if (file->f_flags & O_NONBLOCK) {
- retval = -EAGAIN;
- goto unlock_exit;
- }
- retval = wait_event_interruptible(dev->write_wait,
- !dev->interrupt_out_busy);
- if (retval < 0)
- goto unlock_exit;
- }
-
- /* write the data into interrupt_out_buffer from userspace */
- bytes_to_write = min(count,
- write_buffer_size *
- dev->interrupt_out_endpoint_size);
- if (bytes_to_write < count)
- dev_warn(&dev->intf->dev,
- "Write buffer overflow, %zd bytes dropped\n",
- count - bytes_to_write);
-
- dbg_info(&dev->intf->dev,
- "%s: count = %zd, bytes_to_write = %zd\n", __func__,
- count, bytes_to_write);
-
- if (copy_from_user(dev->interrupt_out_buffer, buffer, bytes_to_write)) {
- retval = -EFAULT;
- goto unlock_exit;
- }
-
- if (dev->interrupt_out_endpoint == NULL) {
- dev_err(&dev->intf->dev, "Endpoint should not be null!\n");
- goto unlock_exit;
- }
-
- /* send off the urb */
- usb_fill_int_urb(dev->interrupt_out_urb,
- interface_to_usbdev(dev->intf),
- usb_sndintpipe(interface_to_usbdev(dev->intf),
- dev->interrupt_out_endpoint->
- bEndpointAddress),
- dev->interrupt_out_buffer, bytes_to_write,
- usb_tranzport_interrupt_out_callback, dev,
- dev->interrupt_out_interval);
-
- dev->interrupt_out_busy = 1;
- wmb();
-
- retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);
- if (retval) {
- dev->interrupt_out_busy = 0;
- dev_err(&dev->intf->dev,
- "Couldn't submit interrupt_out_urb %d\n", retval);
- goto unlock_exit;
- }
- retval = bytes_to_write;
-
-unlock_exit:
- /* unlock the device */
- mutex_unlock(&dev->mtx);
-
-exit:
- return retval;
-}
-
-/* file operations needed when we register this driver */
-static const struct file_operations usb_tranzport_fops = {
- .owner = THIS_MODULE,
- .read = usb_tranzport_read,
- .write = usb_tranzport_write,
- .open = usb_tranzport_open,
- .release = usb_tranzport_release,
- .poll = usb_tranzport_poll,
- .llseek = no_llseek,
-};
-
-/*
- * usb class driver info in order to get a minor number from the usb core,
- * and to have the device registered with the driver core
- */
-static struct usb_class_driver usb_tranzport_class = {
- .name = "tranzport%d",
- .fops = &usb_tranzport_fops,
- .minor_base = USB_TRANZPORT_MINOR_BASE,
-};
-
-/**
- * usb_tranzport_probe
- *
- * Called by the usb core when a new device is connected that it thinks
- * this driver might be interested in.
- */
-static int usb_tranzport_probe(struct usb_interface *intf,
- const struct usb_device_id *id) {
- struct usb_device *udev = interface_to_usbdev(intf);
- struct usb_tranzport *dev = NULL;
- struct usb_host_interface *iface_desc;
- struct usb_endpoint_descriptor *endpoint;
- int i;
- int true_size;
- int retval = -ENOMEM;
-
- /* allocate memory for our device state and initialize it */
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (dev == NULL)
- goto exit;
-
- mutex_init(&dev->mtx);
- dev->intf = intf;
- init_waitqueue_head(&dev->read_wait);
- init_waitqueue_head(&dev->write_wait);
-
- iface_desc = intf->cur_altsetting;
-
- /* set up the endpoint information */
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
- endpoint = &iface_desc->endpoint[i].desc;
-
- if (usb_endpoint_is_int_in(endpoint))
- dev->interrupt_in_endpoint = endpoint;
-
- if (usb_endpoint_is_int_out(endpoint))
- dev->interrupt_out_endpoint = endpoint;
- }
- if (dev->interrupt_in_endpoint == NULL) {
- dev_err(&intf->dev, "Interrupt in endpoint not found\n");
- goto error;
- }
- if (dev->interrupt_out_endpoint == NULL)
- dev_warn(&intf->dev,
- "Interrupt out endpoint not found (using control endpoint instead)\n");
-
- dev->interrupt_in_endpoint_size =
- le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
-
- if (dev->interrupt_in_endpoint_size != 8)
- dev_warn(&intf->dev, "Interrupt in endpoint size is not 8!\n");
-
- if (ring_buffer_size == 0)
- ring_buffer_size = RING_BUFFER_SIZE;
- true_size = min(ring_buffer_size, RING_BUFFER_SIZE);
-
- /*
- * FIXME - there are more usb_alloc routines for dma correctness.
- * Needed?
- */
-
- dev->ring_buffer =
- kmalloc((true_size * sizeof(struct tranzport_cmd)) + 8, GFP_KERNEL);
- if (!dev->ring_buffer)
- goto error;
-
- dev->interrupt_in_buffer =
- kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
- if (!dev->interrupt_in_buffer)
- goto error;
-
- dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!dev->interrupt_in_urb) {
- dev_err(&intf->dev, "Couldn't allocate interrupt_in_urb\n");
- goto error;
- }
- dev->interrupt_out_endpoint_size =
- dev->interrupt_out_endpoint ?
- le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize) :
- udev->descriptor.bMaxPacketSize0;
-
- if (dev->interrupt_out_endpoint_size != 8)
- dev_warn(&intf->dev,
- "Interrupt out endpoint size is not 8!)\n");
-
- dev->interrupt_out_buffer =
- kmalloc_array(write_buffer_size,
- dev->interrupt_out_endpoint_size, GFP_KERNEL);
- if (!dev->interrupt_out_buffer)
- goto error;
-
- dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!dev->interrupt_out_urb) {
- dev_err(&intf->dev, "Couldn't allocate interrupt_out_urb\n");
- goto error;
- }
- dev->interrupt_in_interval =
- min_interrupt_in_interval >
- dev->interrupt_in_endpoint->bInterval ? min_interrupt_in_interval
- : dev->interrupt_in_endpoint->bInterval;
-
- if (dev->interrupt_out_endpoint) {
- dev->interrupt_out_interval =
- min_interrupt_out_interval >
- dev->interrupt_out_endpoint->bInterval ?
- min_interrupt_out_interval :
- dev->interrupt_out_endpoint->bInterval;
- }
-
- /* we can register the device now, as it is ready */
- usb_set_intfdata(intf, dev);
-
- retval = usb_register_dev(intf, &usb_tranzport_class);
- if (retval) {
- /* something prevented us from registering this driver */
- dev_err(&intf->dev,
- "Not able to get a minor for this device.\n");
- usb_set_intfdata(intf, NULL);
- goto error;
- }
-
- retval = device_create_file(&intf->dev, &dev_attr_compress_wheel);
- if (retval)
- goto error;
- retval = device_create_file(&intf->dev, &dev_attr_enable);
- if (retval)
- goto error;
- retval = device_create_file(&intf->dev, &dev_attr_offline);
- if (retval)
- goto error;
-
- /* let the user know what node this device is now attached to */
- dev_info(&intf->dev,
- "Tranzport Device #%d now attached to major %d minor %d\n",
- (intf->minor - USB_TRANZPORT_MINOR_BASE), USB_MAJOR,
- intf->minor);
-
-exit:
- return retval;
-
-error:
- usb_tranzport_delete(dev);
- return retval;
-}
-
-/**
- * usb_tranzport_disconnect
- *
- * Called by the usb core when the device is removed from the system.
- */
-static void usb_tranzport_disconnect(struct usb_interface *intf)
-{
- struct usb_tranzport *dev;
- int minor;
-
- mutex_lock(&disconnect_mutex);
- dev = usb_get_intfdata(intf);
- usb_set_intfdata(intf, NULL);
- mutex_lock(&dev->mtx);
- minor = intf->minor;
- /* give back our minor */
- usb_deregister_dev(intf, &usb_tranzport_class);
-
- /* if the device is not opened, then we clean up right now */
- if (!dev->open_count) {
- mutex_unlock(&dev->mtx);
- usb_tranzport_delete(dev);
- } else {
- dev->intf = NULL;
- mutex_unlock(&dev->mtx);
- }
-
- mutex_unlock(&disconnect_mutex);
-
- dev_info(&intf->dev, "Tranzport Surface #%d now disconnected\n",
- (minor - USB_TRANZPORT_MINOR_BASE));
-}
-
-/* usb specific object needed to register this driver with the usb subsystem */
-static struct usb_driver usb_tranzport_driver = {
- .name = "tranzport",
- .probe = usb_tranzport_probe,
- .disconnect = usb_tranzport_disconnect,
- .id_table = usb_tranzport_table,
-};
-
-module_usb_driver(usb_tranzport_driver);
projects / nvme.git / commitdiff