#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/mutex.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/usb.h>
#define DRIVER_VERSION "USBLCD Driver Version 1.05"
{ .idVendor = 0x10D2, .match_flags = USB_DEVICE_ID_MATCH_VENDOR, },
{ },
};
-MODULE_DEVICE_TABLE (usb, id_table);
+MODULE_DEVICE_TABLE(usb, id_table);
static DEFINE_MUTEX(open_disc_mutex);
struct usb_lcd {
- struct usb_device * udev; /* init: probe_lcd */
- struct usb_interface * interface; /* the interface for this device */
- unsigned char * bulk_in_buffer; /* the buffer to receive data */
- size_t bulk_in_size; /* the size of the receive buffer */
- __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
- __u8 bulk_out_endpointAddr; /* the address of the bulk out endpoint */
+ struct usb_device *udev; /* init: probe_lcd */
+ struct usb_interface *interface; /* the interface for
+ this device */
+ unsigned char *bulk_in_buffer; /* the buffer to receive
+ data */
+ size_t bulk_in_size; /* the size of the
+ receive buffer */
+ __u8 bulk_in_endpointAddr; /* the address of the
+ bulk in endpoint */
+ __u8 bulk_out_endpointAddr; /* the address of the
+ bulk out endpoint */
struct kref kref;
- struct semaphore limit_sem; /* to stop writes at full throttle from
- * using up all RAM */
- struct usb_anchor submitted; /* URBs to wait for before suspend */
+ struct semaphore limit_sem; /* to stop writes at
+ full throttle from
+ using up all RAM */
+ struct usb_anchor submitted; /* URBs to wait for
+ before suspend */
};
#define to_lcd_dev(d) container_of(d, struct usb_lcd, kref)
struct usb_lcd *dev = to_lcd_dev(kref);
usb_put_dev(dev->udev);
- kfree (dev->bulk_in_buffer);
- kfree (dev);
+ kfree(dev->bulk_in_buffer);
+ kfree(dev);
}
interface = usb_find_interface(&lcd_driver, subminor);
if (!interface) {
mutex_unlock(&lcd_mutex);
- err ("USBLCD: %s - error, can't find device for minor %d",
+ err("USBLCD: %s - error, can't find device for minor %d",
__func__, subminor);
return -ENODEV;
}
return 0;
}
-static ssize_t lcd_read(struct file *file, char __user * buffer, size_t count, loff_t *ppos)
+static ssize_t lcd_read(struct file *file, char __user * buffer,
+ size_t count, loff_t *ppos)
{
struct usb_lcd *dev;
int retval = 0;
dev = file->private_data;
/* do a blocking bulk read to get data from the device */
- retval = usb_bulk_msg(dev->udev,
- usb_rcvbulkpipe(dev->udev, dev->bulk_in_endpointAddr),
+ retval = usb_bulk_msg(dev->udev,
+ usb_rcvbulkpipe(dev->udev,
+ dev->bulk_in_endpointAddr),
dev->bulk_in_buffer,
min(dev->bulk_in_size, count),
&bytes_read, 10000);
dev = file->private_data;
if (dev == NULL)
return -ENODEV;
-
+
switch (cmd) {
case IOCTL_GET_HARD_VERSION:
mutex_lock(&lcd_mutex);
bcdDevice = le16_to_cpu((dev->udev)->descriptor.bcdDevice);
- sprintf(buf,"%1d%1d.%1d%1d",
+ sprintf(buf, "%1d%1d.%1d%1d",
(bcdDevice & 0xF000)>>12,
(bcdDevice & 0xF00)>>8,
(bcdDevice & 0xF0)>>4,
(bcdDevice & 0xF));
mutex_unlock(&lcd_mutex);
- if (copy_to_user((void __user *)arg,buf,strlen(buf))!=0)
+ if (copy_to_user((void __user *)arg, buf, strlen(buf)) != 0)
return -EFAULT;
break;
case IOCTL_GET_DRV_VERSION:
- sprintf(buf,DRIVER_VERSION);
- if (copy_to_user((void __user *)arg,buf,strlen(buf))!=0)
+ sprintf(buf, DRIVER_VERSION);
+ if (copy_to_user((void __user *)arg, buf, strlen(buf)) != 0)
return -EFAULT;
break;
default:
if (status &&
!(status == -ENOENT ||
status == -ECONNRESET ||
- status == -ESHUTDOWN)) {
+ status == -ESHUTDOWN)) {
dbg("USBLCD: %s - nonzero write bulk status received: %d",
__func__, status);
}
up(&dev->limit_sem);
}
-static ssize_t lcd_write(struct file *file, const char __user * user_buffer, size_t count, loff_t *ppos)
+static ssize_t lcd_write(struct file *file, const char __user * user_buffer,
+ size_t count, loff_t *ppos)
{
struct usb_lcd *dev;
- int retval = 0, r;
+ int retval = 0, r;
struct urb *urb = NULL;
char *buf = NULL;
-
+
dev = file->private_data;
-
+
/* verify that we actually have some data to write */
if (count == 0)
goto exit;
retval = -ENOMEM;
goto err_no_buf;
}
-
- buf = usb_alloc_coherent(dev->udev, count, GFP_KERNEL, &urb->transfer_dma);
+
+ buf = usb_alloc_coherent(dev->udev, count, GFP_KERNEL,
+ &urb->transfer_dma);
if (!buf) {
retval = -ENOMEM;
goto error;
}
-
+
if (copy_from_user(buf, user_buffer, count)) {
retval = -EFAULT;
goto error;
}
-
+
/* initialize the urb properly */
usb_fill_bulk_urb(urb, dev->udev,
- usb_sndbulkpipe(dev->udev, dev->bulk_out_endpointAddr),
+ usb_sndbulkpipe(dev->udev,
+ dev->bulk_out_endpointAddr),
buf, count, lcd_write_bulk_callback, dev);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_anchor_urb(urb, &dev->submitted);
-
+
/* send the data out the bulk port */
retval = usb_submit_urb(urb, GFP_KERNEL);
if (retval) {
- err("USBLCD: %s - failed submitting write urb, error %d", __func__, retval);
+ err("USBLCD: %s - failed submitting write urb, error %d",
+ __func__, retval);
goto error_unanchor;
}
-
- /* release our reference to this urb, the USB core will eventually free it entirely */
+
+ /* release our reference to this urb,
+ the USB core will eventually free it entirely */
usb_free_urb(urb);
exit:
}
static const struct file_operations lcd_fops = {
- .owner = THIS_MODULE,
- .read = lcd_read,
- .write = lcd_write,
- .open = lcd_open,
+ .owner = THIS_MODULE,
+ .read = lcd_read,
+ .write = lcd_write,
+ .open = lcd_open,
.unlocked_ioctl = lcd_ioctl,
- .release = lcd_release,
- .llseek = noop_llseek,
+ .release = lcd_release,
+ .llseek = noop_llseek,
};
/*
* and to have the device registered with the driver core
*/
static struct usb_class_driver lcd_class = {
- .name = "lcd%d",
- .fops = &lcd_fops,
- .minor_base = USBLCD_MINOR,
+ .name = "lcd%d",
+ .fops = &lcd_fops,
+ .minor_base = USBLCD_MINOR,
};
-static int lcd_probe(struct usb_interface *interface, const struct usb_device_id *id)
+static int lcd_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
{
struct usb_lcd *dev = NULL;
struct usb_host_interface *iface_desc;
retval = -ENODEV;
goto error;
}
-
+
/* set up the endpoint information */
/* use only the first bulk-in and bulk-out endpoints */
iface_desc = interface->cur_altsetting;
dev_info(&interface->dev, "USBLCD Version %1d%1d.%1d%1d found "
"at address %d\n", (i & 0xF000)>>12, (i & 0xF00)>>8,
- (i & 0xF0)>>4,(i & 0xF), dev->udev->devnum);
+ (i & 0xF0)>>4, (i & 0xF), dev->udev->devnum);
/* let the user know what node this device is now attached to */
dev_info(&interface->dev, "USB LCD device now attached to USBLCD-%d\n",
return 0;
}
-static int lcd_resume (struct usb_interface *intf)
+static int lcd_resume(struct usb_interface *intf)
{
return 0;
}
static void lcd_disconnect(struct usb_interface *interface)
{
struct usb_lcd *dev;
- int minor = interface->minor;
+ int minor = interface->minor;
mutex_lock(&open_disc_mutex);
- dev = usb_get_intfdata(interface);
- usb_set_intfdata(interface, NULL);
+ dev = usb_get_intfdata(interface);
+ usb_set_intfdata(interface, NULL);
mutex_unlock(&open_disc_mutex);
- /* give back our minor */
- usb_deregister_dev(interface, &lcd_class);
-
+ /* give back our minor */
+ usb_deregister_dev(interface, &lcd_class);
+
/* decrement our usage count */
kref_put(&dev->kref, lcd_delete);
static int __init usb_lcd_init(void)
{
int result;
-
+
result = usb_register(&lcd_driver);
if (result)
err("usb_register failed. Error number %d", result);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff