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提交 7c68d6b7 编写于 作者: D David Täht 提交者： Greg Kroah-Hartman
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Staging: frontier: Make checkpatch.pl considerably happier with tranzport driver. 

Signed-off-by: NDavid Täht <d@teklibre.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
上级 d44ca7af
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drivers/staging/frontier/tranzport.c
浏览文件 @ 7c68d6b7
......@@ -18,7 +18,7 @@
*
*/
/**
/*
* This driver uses a ring buffer for time critical reading of
* interrupt in reports and provides read and write methods for
* raw interrupt reports.
......@@ -30,7 +30,7 @@
* 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>
......@@ -40,56 +40,47 @@
#include <linux/mutex.h>
#include <linux/version.h>
#include <asm/uaccess.h>
#include <linux/uaccess.h>
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/poll.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
#include frontier_compat.h
#endif
/* 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 176 - is the ldusb driver's minor - apply for a minor soon
#else /* FIXME 176 - is the ldusb driver's minor - apply for a minor soon */
#define USB_TRANZPORT_MINOR_BASE 177
#endif
/* table of devices that work with this driver */
static struct usb_device_id usb_tranzport_table [] = {
{ USB_DEVICE(VENDOR_ID, PRODUCT_ID) },
{ } /* Terminating entry */
static struct usb_device_id usb_tranzport_table[] = {
{USB_DEVICE(VENDOR_ID, PRODUCT_ID)},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, usb_tranzport_table);
MODULE_VERSION("0.33");
MODULE_VERSION("0.34");
MODULE_AUTHOR("Mike Taht <m@taht.net>");
MODULE_DESCRIPTION("Tranzport USB Driver");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("Frontier Designs Tranzport Control Surface");
/* These two aren't done yet */
#define SUPPRESS_EXTRA_ONLINE_EVENTS 0
#define BUFFERED_WRITES 0
#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 = 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)
#define dbg_info(dev, format, arg...) do \
{ if (debug) dev_info(dev , format , ## arg); } while (0)
/* Module parameters */
......@@ -118,11 +109,13 @@ MODULE_PARM_DESC(write_buffer_size, "Write buffer size");
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");
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");
MODULE_PARM_DESC(min_interrupt_out_interval,
"Minimum interrupt out interval in ms");
struct tranzport_cmd {
unsigned char cmd[8];
......@@ -136,34 +129,29 @@ enum LightID {
LightAnysolo,
LightLoop,
LightPunch
};
};
/* Structure to hold all of our device specific stuff */
struct usb_tranzport {
struct semaphore sem; /* locks this structure */
struct usb_interface* intf; /* save off the usb interface pointer */
int open_count; /* number of times this port has been opened */
struct tranzport_cmd (*ring_buffer)[RING_BUFFER_SIZE]; /* just make c happy */
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;
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;
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;
......@@ -179,7 +167,7 @@ struct usb_tranzport {
unsigned char light; /* 7 bits used */
unsigned char last_cmd[8];
unsigned char last_input[8];
unsigned char screen[40]; // We'll also have cells
unsigned char screen[40]; /* We'll also have cells */
};
......@@ -205,27 +193,30 @@ static void usb_tranzport_abort_transfers(struct usb_tranzport *dev)
usb_kill_urb(dev->interrupt_out_urb);
}
// FIXME ~light not good enough or correct - need atomic set_bit
/* FIXME ~light not good enough or correct - need atomic set_bit */
#define show_set_light(value) \
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
static ssize_t show_##value( \
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); \
enum LightID light = value; \
int temp = (1 && (t->light & (1 << light))); \
return sprintf(buf, "%d\n", temp ); \
} \
static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
return sprintf(buf, "%d\n", temp); \
} \
static ssize_t set_##value( \
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); \
int temp = simple_strtoul(buf, NULL, 10); \
enum LightID light = (temp << value) & (t->light << value); \
t->light = (t->light & ~light) ; \
return count; \
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
show_set_light(LightRecord);
show_set_light(LightTrackrec);
......@@ -235,25 +226,25 @@ show_set_light(LightAnysolo);
show_set_light(LightLoop);
show_set_light(LightPunch);
#define show_set_int(value) \
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
static ssize_t show_##value(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 set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
} \
static ssize_t set_##value(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); \
int temp = simple_strtoul(buf, NULL, 10); \
\
t->value = temp; \
return count; \
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
show_set_int(enable);
show_set_int(offline);
......@@ -263,26 +254,26 @@ show_set_int(wheel);
show_set_int(event);
#define show_set_cmd(value) \
static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
static ssize_t show_##value(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 set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
} \
static ssize_t set_##value(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); \
int temp = simple_strtoul(buf, NULL, 10); \
\
t->value = temp; \
return count; \
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO, show_##value, set_##value);
/**
* usb_tranzport_delete
......@@ -291,7 +282,7 @@ static void usb_tranzport_delete(struct usb_tranzport *dev)
{
usb_tranzport_abort_transfers(dev);
/* This is just too twisted to be correct */
if(dev->intf != NULL) {
if (dev->intf != NULL) {
device_remove_file(&dev->intf->dev, &dev_attr_LightRecord);
device_remove_file(&dev->intf->dev, &dev_attr_LightTrackrec);
device_remove_file(&dev->intf->dev, &dev_attr_LightTrackmute);
......@@ -305,7 +296,6 @@ static void usb_tranzport_delete(struct usb_tranzport *dev)
device_remove_file(&dev->intf->dev, &dev_attr_event);
device_remove_file(&dev->intf->dev, &dev_attr_offline);
device_remove_file(&dev->intf->dev, &dev_attr_compress_wheel);
device_remove_file(&dev->intf->dev, &dev_attr_dump_state);
}
......@@ -334,7 +324,8 @@ static void usb_tranzport_interrupt_in_callback(struct urb *urb)
urb->status == -ESHUTDOWN) {
goto exit;
} else {
dbg_info(&dev->intf->dev, "%s: nonzero status received: %d\n",
dbg_info(&dev->intf->dev,
"%s: nonzero status received: %d\n",
__func__, urb->status);
goto resubmit; /* maybe we can recover */
}
......@@ -342,25 +333,43 @@ static void usb_tranzport_interrupt_in_callback(struct urb *urb)
if (urb->actual_length != 8) {
dev_warn(&dev->intf->dev,
"Urb length was %d bytes!! Do something intelligent \n", urb->actual_length);
"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]);
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; }
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; }
/* 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);
#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;
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);
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);
......@@ -373,7 +382,7 @@ static void usb_tranzport_interrupt_in_callback(struct urb *urb)
}
resubmit:
/* resubmit if we're still running */
/* 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)
......@@ -392,7 +401,6 @@ static void usb_tranzport_interrupt_in_callback(struct urb *urb)
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 ||
......@@ -404,7 +412,6 @@ static void usb_tranzport_interrupt_out_callback(struct urb *urb)
dev->interrupt_out_busy = 0;
wake_up_interruptible(&dev->write_wait);
}
/**
* usb_tranzport_open
*/
......@@ -455,11 +462,11 @@ static int usb_tranzport_open(struct inode *inode, struct file *file)
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_endpoint->
bEndpointAddress),
dev->interrupt_in_buffer,
dev->interrupt_in_endpoint_size,
usb_tranzport_interrupt_in_callback,
dev,
usb_tranzport_interrupt_in_callback, dev,
dev->interrupt_in_interval);
dev->interrupt_in_running = 1;
......@@ -470,7 +477,8 @@ static int usb_tranzport_open(struct inode *inode, struct file *file)
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_err(&interface->dev,
"Couldn't submit interrupt_in_urb %d\n", retval);
dev->interrupt_in_running = 0;
dev->open_count = 0;
goto unlock_exit;
......@@ -479,7 +487,6 @@ static int usb_tranzport_open(struct inode *inode, struct file *file)
/* save device in the file's private structure */
file->private_data = dev;
unlock_exit:
up(&dev->sem);
......@@ -525,7 +532,9 @@ static int usb_tranzport_release(struct inode *inode, struct file *file)
/* wait until write transfer is finished */
if (dev->interrupt_out_busy)
wait_event_interruptible_timeout(dev->write_wait, !dev->interrupt_out_busy, 2 * HZ);
wait_event_interruptible_timeout(dev->write_wait,
!dev->interrupt_out_busy,
2 * HZ);
usb_tranzport_abort_transfers(dev);
dev->open_count = 0;
......@@ -539,37 +548,31 @@ static int usb_tranzport_release(struct inode *inode, struct file *file)
/**
* usb_tranzport_poll
*/
static unsigned int usb_tranzport_poll(struct file *file, poll_table *wait)
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)
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;
......@@ -577,7 +580,7 @@ static ssize_t usb_tranzport_read(struct file *file, char __user *buffer, size_t
int next_tail;
#endif
/* do I have such a thing as a null event? */
/* do I have such a thing as a null event? */
dev = file->private_data;
......@@ -591,8 +594,7 @@ static ssize_t usb_tranzport_read(struct file *file, char __user *buffer, size_t
goto exit;
}
/* verify that the device wasn't unplugged */
if (dev->intf == NULL) {
/* verify that the device wasn't unplugged */ if (dev->intf == NULL) {
retval = -ENODEV;
err("No device or device unplugged %d\n", retval);
goto unlock_exit;
......@@ -604,104 +606,149 @@ static ssize_t usb_tranzport_read(struct file *file, char __user *buffer, size_t
retval = -EAGAIN;
goto unlock_exit;
}
// atomic_cmp_exchange(&dev->interrupt_in_done,0,0);
dev->interrupt_in_done = 0 ; /* tiny race - FIXME: make atomic? */
retval = wait_event_interruptible(dev->read_wait, dev->interrupt_in_done);
if (retval < 0) {
/* 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]);
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)) {
while ((c < count) && (dev->ring_tail != dev->ring_head)) {
/* This started off in the lower level service routine, and I moved it here. Then my brain died. Not done yet. */
#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 ) {
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
// FIXME: saner check for overflow! - max of +- 7F
// FIXME the math is wrong for going in reverse, actually, as the midi spec doesn't allow signed chars
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 ) &&
/* 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]);
((*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)) {
if (oldwheel > 0 && !(newwheel > 0)) {
newwheel = 0x7f;
cancompress = 0;
}
if(oldwheel < 0 && !(newwheel < 0)) {
if (oldwheel < 0 && !(newwheel < 0)) {
newwheel = 0x80;
cancompress = 0;
}
(*dev->ring_buffer)[next_tail].cmd[6] = newwheel;
(*dev->ring_buffer)[next_tail].cmd[6] =
newwheel;
dev->ring_tail = next_tail;
next_tail = (dev->ring_tail+1) % ring_buffer_size;
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)) {
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);
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)) {
/* 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);
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;
retval = 8;
#endif /* BUFFERED_READS */
unlock_exit:
/* unlock the device */
up(&dev->sem);
/* unlock the device */
up(&dev->sem);
exit:
return retval;
return retval;
}
/**
* usb_tranzport_write
*/
static ssize_t usb_tranzport_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos)
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;
......@@ -718,7 +765,6 @@ static ssize_t usb_tranzport_write(struct file *file, const char __user *buffer,
retval = -ERESTARTSYS;
goto exit;
}
/* verify that the device wasn't unplugged */
if (dev->intf == NULL) {
retval = -ENODEV;
......@@ -732,18 +778,24 @@ static ssize_t usb_tranzport_write(struct file *file, const char __user *buffer,
retval = -EAGAIN;
goto unlock_exit;
}
retval = wait_event_interruptible(dev->write_wait, !dev->interrupt_out_busy);
if (retval < 0) {
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);
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);
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);
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;
......@@ -759,11 +811,10 @@ static ssize_t usb_tranzport_write(struct file *file, const char __user *buffer,
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_endpoint->
bEndpointAddress),
dev->interrupt_out_buffer, bytes_to_write,
usb_tranzport_interrupt_out_callback, dev,
dev->interrupt_out_interval);
dev->interrupt_out_busy = 1;
......@@ -805,15 +856,14 @@ static struct usb_class_driver usb_tranzport_class = {
.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)
{
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;
......@@ -851,25 +901,33 @@ static int usb_tranzport_probe(struct usb_interface *intf, const struct usb_devi
goto error;
}
if (dev->interrupt_out_endpoint == NULL)
dev_warn(&intf->dev, "Interrupt out endpoint not found (using control endpoint instead)\n");
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);
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? */
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);
dev->ring_buffer =
kmalloc((true_size * sizeof(struct tranzport_cmd)) + 8, GFP_KERNEL);
if (!dev->ring_buffer) {
dev_err(&intf->dev, "Couldn't allocate ring_buffer of size %d\n",true_size);
dev_err(&intf->dev,
"Couldn't allocate ring_buffer size %d\n", true_size);
goto error;
}
dev->interrupt_in_buffer = kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
dev->interrupt_in_buffer =
kmalloc(dev->interrupt_in_endpoint_size, GFP_KERNEL);
if (!dev->interrupt_in_buffer) {
dev_err(&intf->dev, "Couldn't allocate interrupt_in_buffer\n");
goto error;
......@@ -879,13 +937,18 @@ static int usb_tranzport_probe(struct usb_interface *intf, const struct usb_devi
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) :
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");
if (dev->interrupt_out_endpoint_size != 8)
dev_warn(&intf->dev,
"Interrupt out endpoint size is not 8!)\n");
dev->interrupt_out_buffer = kmalloc(write_buffer_size*dev->interrupt_out_endpoint_size, GFP_KERNEL);
dev->interrupt_out_buffer =
kmalloc(write_buffer_size * dev->interrupt_out_endpoint_size,
GFP_KERNEL);
if (!dev->interrupt_out_buffer) {
dev_err(&intf->dev, "Couldn't allocate interrupt_out_buffer\n");
goto error;
......@@ -895,9 +958,18 @@ static int usb_tranzport_probe(struct usb_interface *intf, const struct usb_devi
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;
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);
......@@ -905,35 +977,63 @@ static int usb_tranzport_probe(struct usb_interface *intf, const struct usb_devi
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");
dev_err(&intf->dev,
"Not able to get a minor for this device.\n");
usb_set_intfdata(intf, NULL);
goto error;
}
if((retval = device_create_file(&intf->dev, &dev_attr_LightRecord))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTrackrec))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTrackmute))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightTracksolo))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightAnysolo))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightLoop))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_LightPunch))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_wheel))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_event))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_dump_state))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_compress_wheel))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_enable))) goto error;
if((retval = device_create_file(&intf->dev, &dev_attr_offline))) goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightRecord);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightTrackrec);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightTrackmute);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightTracksolo);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightAnysolo);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightLoop);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_LightPunch);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_wheel);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_event);
if (retval)
goto error;
retval = device_create_file(&intf->dev, &dev_attr_dump_state);
if (retval)
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);
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;
}
......@@ -987,14 +1087,14 @@ static int __init usb_tranzport_init(void)
/* register this driver with the USB subsystem */
retval = usb_register(&usb_tranzport_driver);
if (retval)
err("usb_register failed for the "__FILE__" driver. Error number %d\n", retval);
err("usb_register failed for the " __FILE__
" driver. Error number %d\n", retval);
return retval;
}
/**
* usb_tranzport_exit
*/
static void __exit usb_tranzport_exit(void)
{
/* deregister this driver with the USB subsystem */
......@@ -1003,4 +1103,3 @@ static void __exit usb_tranzport_exit(void)
module_init(usb_tranzport_init);
module_exit(usb_tranzport_exit);
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