initial import
This commit is contained in:
ond
commit
87403d3f9c
8
Makefile
Normal file
8
Makefile
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@ -0,0 +1,8 @@
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obj-m += hanvon.o
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all:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
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clean:
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make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
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251
hanvon.c
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251
hanvon.c
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/usb/input.h>
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#include <asm/unaligned.h>
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#define DRIVER_VERSION "v0.0.1"
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#define DRIVER_AUTHOR "Ondra Havel <ondra.havel@gmail.com>"
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#define DRIVER_DESC "USB Hanvon AM0806 tablet driver"
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#define DRIVER_LICENSE "GPL"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE(DRIVER_LICENSE);
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#define USB_VENDOR_ID_HANVON 0x0b57
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#define B0 BTN_TOOL_RUBBER
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#define B1 BTN_TOOL_FINGER
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#define B2 BTN_TOOL_PENCIL
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#define B3 BTN_TOOL_AIRBRUSH
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struct hanvon {
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unsigned char *data;
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dma_addr_t data_dma;
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struct input_dev *dev;
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struct usb_device *usbdev;
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struct urb *irq;
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int x, y;
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unsigned b0:1;
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unsigned b1:1;
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unsigned b2:1;
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unsigned b3:1;
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int b_wheel;
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int pressure;
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char phys[32];
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};
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static void hanvon_irq(struct urb *urb)
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{
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struct hanvon *hanvon = urb->context;
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unsigned char *data = hanvon->data;
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struct input_dev *dev = hanvon->dev;
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int retval;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dbg("%s - urb shutting down with status: %d", __func__, urb->status);
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return;
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default:
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dbg("%s - nonzero urb status received: %d", __func__, urb->status);
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goto exit;
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}
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switch(data[0]) {
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case 0x01: // button press
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if((data[2] & 0xf0) == 0xa0) {
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hanvon->b1 = data[2] & 0x02;
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hanvon->b2 = data[2] & 0x04;
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hanvon->b3 = data[2] & 0x08;
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input_report_key(dev, B1, hanvon->b1);
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input_report_key(dev, B2, hanvon->b2);
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input_report_key(dev, B3, hanvon->b3);
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} else {
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hanvon->b_wheel = data[2]; // FIXME: calculate position 0 .. 255
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input_report_key(dev, BTN_WHEEL, hanvon->b_wheel);
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}
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break;
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case 0x02: // position change
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if((data[1] & 0xf0) != 0) {
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hanvon->x = get_unaligned_be16(&data[2]);
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hanvon->y = get_unaligned_be16(&data[4]);
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hanvon->pressure = get_unaligned_be16(&data[6]);
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} else {
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hanvon->pressure = 0;
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}
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hanvon->b0 = data[1] & 0x20;
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//input_report_key(dev, BTN_TOUCH, data[1] & 0x1);
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input_report_key(dev, BTN_LEFT, data[1] & 0x1);
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input_report_key(dev, BTN_RIGHT, data[1] & 0x2); // stylus button pressed (right click)
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input_report_abs(dev, ABS_X, hanvon->x);
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input_report_abs(dev, ABS_Y, hanvon->y);
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input_report_abs(dev, ABS_PRESSURE, hanvon->pressure);
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input_report_key(dev, B0, hanvon->b0);
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break;
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}
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input_sync(dev);
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exit:
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retval = usb_submit_urb (urb, GFP_ATOMIC);
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if (retval)
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err("%s - usb_submit_urb failed with result %d", __func__, retval);
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}
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static struct usb_device_id hanvon_ids[] = {
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{ USB_DEVICE(USB_VENDOR_ID_HANVON, 0x8502), .driver_info = 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, hanvon_ids);
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static int hanvon_open(struct input_dev *dev)
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{
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struct hanvon *hanvon = input_get_drvdata(dev);
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hanvon->irq->dev = hanvon->usbdev;
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if (usb_submit_urb(hanvon->irq, GFP_KERNEL))
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return -EIO;
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return 0;
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}
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static void hanvon_close(struct input_dev *dev)
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{
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struct hanvon *hanvon = input_get_drvdata(dev);
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usb_kill_urb(hanvon->irq);
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}
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static int hanvon_probe(struct usb_interface *intf, const struct usb_device_id *id)
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{
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struct usb_device *dev = interface_to_usbdev(intf);
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struct usb_endpoint_descriptor *endpoint;
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struct hanvon *hanvon;
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struct input_dev *input_dev;
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int error = -ENOMEM;
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hanvon = kzalloc(sizeof(struct hanvon), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!hanvon || !input_dev)
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goto fail1;
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//hanvon->data = (unsigned char *)usb_buffer_alloc(dev, 8, GFP_KERNEL, &hanvon->data_dma);
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hanvon->data = (unsigned char *)usb_alloc_coherent(dev, 10, GFP_KERNEL, &hanvon->data_dma);
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if (!hanvon->data)
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goto fail1;
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hanvon->irq = usb_alloc_urb(0, GFP_KERNEL);
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if (!hanvon->irq)
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goto fail2;
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hanvon->usbdev = dev;
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hanvon->dev = input_dev;
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usb_make_path(dev, hanvon->phys, sizeof(hanvon->phys));
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strlcat(hanvon->phys, "/input0", sizeof(hanvon->phys));
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input_dev->name = "Hanvon AM0806 Tablet";
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input_dev->phys = hanvon->phys;
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usb_to_input_id(dev, &input_dev->id);
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input_dev->dev.parent = &intf->dev;
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input_set_drvdata(input_dev, hanvon);
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input_dev->open = hanvon_open;
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input_dev->close = hanvon_close;
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input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) |
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BIT_MASK(EV_MSC);
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input_dev->keybit[BIT_WORD(BTN_LEFT)] |= BIT_MASK(BTN_LEFT) |
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BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
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input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
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BIT_MASK(BTN_TOUCH);
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input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
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input_set_abs_params(input_dev, ABS_X, 0, 0x27de, 4, 0);
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input_set_abs_params(input_dev, ABS_Y, 0, 0x1cfe, 4, 0);
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input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xffffffff, 4, 0);
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endpoint = &intf->cur_altsetting->endpoint[0].desc;
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usb_fill_int_urb(hanvon->irq, dev,
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usb_rcvintpipe(dev, endpoint->bEndpointAddress),
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hanvon->data, 10,
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hanvon_irq, hanvon, endpoint->bInterval);
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hanvon->irq->transfer_dma = hanvon->data_dma;
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hanvon->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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error = input_register_device(hanvon->dev);
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if (error)
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goto fail3;
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usb_set_intfdata(intf, hanvon);
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return 0;
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fail3: usb_free_urb(hanvon->irq);
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//fail2: usb_buffer_free(dev, 10, hanvon->data, hanvon->data_dma);
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fail2: usb_free_coherent(dev, 10, hanvon->data, hanvon->data_dma);
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fail1: input_free_device(input_dev);
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kfree(hanvon);
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return error;
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}
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static void hanvon_disconnect(struct usb_interface *intf)
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{
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struct hanvon *hanvon = usb_get_intfdata(intf);
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usb_set_intfdata(intf, NULL);
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if (hanvon) {
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usb_kill_urb(hanvon->irq);
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input_unregister_device(hanvon->dev);
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usb_free_urb(hanvon->irq);
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//usb_buffer_free(interface_to_usbdev(intf), 10, hanvon->data, hanvon->data_dma);
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usb_free_coherent(interface_to_usbdev(intf), 10, hanvon->data, hanvon->data_dma);
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kfree(hanvon);
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}
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}
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static struct usb_driver hanvon_driver = {
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.name = "hanvon",
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.probe = hanvon_probe,
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.disconnect = hanvon_disconnect,
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.id_table = hanvon_ids,
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};
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static int __init hanvon_init(void)
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{
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int rv;
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if((rv = usb_register(&hanvon_driver)) != 0)
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return rv;
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printk(DRIVER_VERSION ":" DRIVER_DESC "\n");
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return 0;
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}
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static void __exit hanvon_exit(void)
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{
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usb_deregister(&hanvon_driver);
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}
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module_init(hanvon_init);
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module_exit(hanvon_exit);
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