scuti/hanvon-linux
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open/close race conditions fixed, get_unaligned_be16 removed

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This commit is contained in:
Ondra Havel 2012-01-23 01:36:01 +01:00
parent 7d86a5ff35
commit 614a2aa30e
2 changed files with 23 additions and 20 deletions
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6
README
View File

@ -1,9 +1,9 @@
Hanvon tablet driver
====================
Driver for Linux kernels which supports complete functionality of the tablet:
pen coordinates, touch/float/click detection, pressure, x and y tilt, pen
button. On Artmaster I four simple tablet buttons (note that the first
Linux kernel driver for some Hanvon tablet usb models. Following functionality
is covered. pen coordinates, touch/float/click detection, pressure, x and y
tilt, pen button. On Artmaster I four simple tablet buttons (note that the first
one works only together with pen activity), and the slider button.

25
hanvon.c
View File

@ -3,9 +3,8 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb/input.h>
#include <asm/unaligned.h>
#define DRIVER_VERSION "0.4"
#define DRIVER_VERSION "0.4a"
#define DRIVER_AUTHOR "Ondra Havel <ondra.havel@gmail.com>"
#define DRIVER_DESC "USB Hanvon tablet driver"
#define DRIVER_LICENSE "GPL"
@ -35,6 +34,7 @@ static int rbuttons[]={BTN_4,BTN_5,BTN_6,BTN_7}; /* reported on AM1107+ */
struct hanvon {
unsigned char *data;
dma_addr_t data_dma;
struct mutex mutex;
struct input_dev *dev;
struct usb_device *usbdev;
struct urb *irq;
@ -91,14 +91,13 @@ static void hanvon_irq(struct urb *urb)
if(data[3]==0xaa) /* right side (am1107, am1209) */
report_buttons(hanvon,rbuttons,data[4]);
break;
case 0x02: /* position change */
if((data[1] & 0xf0) != 0) {
input_report_abs(dev, ABS_X, get_unaligned_be16(&data[2]));
input_report_abs(dev, ABS_Y, get_unaligned_be16(&data[4]));
input_report_abs(dev, ABS_X, be16_to_cpup((__be16 *)&data[2]));
input_report_abs(dev, ABS_Y, be16_to_cpup((__be16 *)&data[4]));
input_report_abs(dev, ABS_TILT_X, data[7] & 0x3f);
input_report_abs(dev, ABS_TILT_Y, data[8]);
input_report_abs(dev, ABS_PRESSURE, get_unaligned_be16(&data[6])>>6);
input_report_abs(dev, ABS_PRESSURE, be16_to_cpup((__be16 *)&data[6])>>6);
}
input_report_key(dev, BTN_LEFT, data[1] & 0x1);
@ -127,21 +126,25 @@ MODULE_DEVICE_TABLE(usb, hanvon_ids);
static int hanvon_open(struct input_dev *dev)
{
int ret=0;
struct hanvon *hanvon = input_get_drvdata(dev);
hanvon->old_wheel_pos = -AM_WHEEL_THRESHOLD-1;
hanvon->irq->dev = hanvon->usbdev;
mutex_lock(&hanvon->mutex);
if(usb_submit_urb(hanvon->irq, GFP_KERNEL))
return -EIO;
return 0;
ret = -EIO;
mutex_unlock(&hanvon->mutex);
return ret;
}
static void hanvon_close(struct input_dev *dev)
{
struct hanvon *hanvon = input_get_drvdata(dev);
mutex_lock(&hanvon->mutex);
usb_kill_urb(hanvon->irq);
mutex_unlock(&hanvon->mutex);
}
static int hanvon_probe(struct usb_interface *intf, const struct usb_device_id *id)
@ -210,6 +213,7 @@ static int hanvon_probe(struct usb_interface *intf, const struct usb_device_id *
goto fail3;
usb_set_intfdata(intf, hanvon);
mutex_init(&hanvon->mutex);
return 0;
fail3: usb_free_urb(hanvon->irq);
@ -224,14 +228,13 @@ static void hanvon_disconnect(struct usb_interface *intf)
struct hanvon *hanvon = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (hanvon) {
usb_kill_urb(hanvon->irq);
input_unregister_device(hanvon->dev);
usb_free_urb(hanvon->irq);
usb_free_coherent(interface_to_usbdev(intf), USB_AM_PACKET_LEN, hanvon->data, hanvon->data_dma);
kfree(hanvon);
}
}
static struct usb_driver hanvon_driver = {
.name = "hanvon",