phidgetkit.c

linux-2.6.15.6

		kit->sensors[0] = buffer[2] + (buffer[3] & 0x0f) * 256;
		kit->sensors[1] = buffer[4] + (buffer[3] & 0xf0) * 16;
		kit->sensors[2] = buffer[5] + (buffer[6] & 0x0f) * 256;
		kit->sensors[3] = buffer[7] + (buffer[6] & 0xf0) * 16;
	}

resubmit:
	status = usb_submit_urb(urb, SLAB_ATOMIC);
	if (status)
		err("can't resubmit intr, %s-%s/interfacekit0, status %d",
			kit->udev->bus->bus_name,
			kit->udev->devpath, status);
}

#define show_set_output(value)		\
static ssize_t set_output##value(struct device *dev, struct device_attribute *attr, const char *buf, 	\
							size_t count)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct phidget_interfacekit *kit = usb_get_intfdata(intf);	\
	int enabled;							\
	int retval;							\
									\
	if (sscanf(buf, "%d", &enabled) < 1) {				\
		return -EINVAL;						\
	}								\
									\
	retval = change_outputs(kit, value - 1, enabled ? 1 : 0);	\
									\
	return retval ? retval : count;					\
}									\
									\
static ssize_t show_output##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct phidget_interfacekit *kit = usb_get_intfdata(intf);	\
									\
	return sprintf(buf, "%d\n", kit->outputs[value - 1]);		\
}									\
static DEVICE_ATTR(output##value, S_IWUGO | S_IRUGO,			\
		show_output##value, set_output##value);
show_set_output(1);
show_set_output(2);
show_set_output(3);
show_set_output(4);
show_set_output(5);
show_set_output(6);
show_set_output(7);
show_set_output(8);	/* should be MAX_INTERFACES - 1 */

#define show_input(value)	\
static ssize_t show_input##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct phidget_interfacekit *kit = usb_get_intfdata(intf);	\
									\
	return sprintf(buf, "%d\n", kit->inputs[value - 1]);		\
}									\
static DEVICE_ATTR(input##value, S_IRUGO, show_input##value, NULL);

show_input(1);
show_input(2);
show_input(3);
show_input(4);
show_input(5);
show_input(6);
show_input(7);
show_input(8);		/* should be MAX_INTERFACES - 1 */

#define show_sensor(value)	\
static ssize_t show_sensor##value(struct device *dev, struct device_attribute *attr, char *buf)	\
{									\
	struct usb_interface *intf = to_usb_interface(dev);		\
	struct phidget_interfacekit *kit = usb_get_intfdata(intf);	\
									\
	return sprintf(buf, "%d\n", kit->sensors[value - 1]);		\
}									\
static DEVICE_ATTR(sensor##value, S_IRUGO, show_sensor##value, NULL);

show_sensor(1);
show_sensor(2);
show_sensor(3);
show_sensor(4);
show_sensor(5);
show_sensor(6);
show_sensor(7);
show_sensor(8);		/* should be MAX_INTERFACES - 1 */

static int interfacekit_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(intf);
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct phidget_interfacekit *kit;
	struct driver_interfacekit *ifkit;
	int pipe, maxp;

	ifkit = (struct driver_interfacekit *)id->driver_info;
	if (!ifkit)
		return -ENODEV;

	interface = intf->cur_altsetting;
	if (interface->desc.bNumEndpoints != 1)
		return -ENODEV;

	endpoint = &interface->endpoint[0].desc;
	if (!(endpoint->bEndpointAddress & 0x80)) 
		return -ENODEV;
	/*
	 * bmAttributes
	 */
	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
	
	kit = kmalloc(sizeof(*kit), GFP_KERNEL);
	if (kit  == NULL) {
		dev_err(&intf->dev, "%s - out of memory\n", __FUNCTION__);
		return -ENOMEM;
	}
	memset(kit, 0, sizeof(*kit));
	kit->ifkit = ifkit;

	kit->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kit->data_dma);
	if (!kit->data) {
		kfree(kit);
		return -ENOMEM;
	}

	kit->irq = usb_alloc_urb(0, GFP_KERNEL);
	if (!kit->irq) {
		usb_buffer_free(dev, 8, kit->data, kit->data_dma);
		kfree(kit);
		return -ENOMEM;
	}

	kit->udev = usb_get_dev(dev);
	kit->intf = intf;
	usb_fill_int_urb(kit->irq, kit->udev, pipe, kit->data,
			(maxp > 8 ? 8 : maxp),
			interfacekit_irq, kit, endpoint->bInterval);
	kit->irq->transfer_dma = kit->data_dma;
	kit->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	usb_set_intfdata(intf, kit);

	if (usb_submit_urb(kit->irq, GFP_KERNEL)) {
		return -EIO;
	}

	if (ifkit->outputs >= 4) {
		device_create_file(&intf->dev, &dev_attr_output1);
		device_create_file(&intf->dev, &dev_attr_output2);
		device_create_file(&intf->dev, &dev_attr_output3);
		device_create_file(&intf->dev, &dev_attr_output4);
	}
	if (ifkit->outputs == 8) {
		device_create_file(&intf->dev, &dev_attr_output5);
		device_create_file(&intf->dev, &dev_attr_output6);
		device_create_file(&intf->dev, &dev_attr_output7);
		device_create_file(&intf->dev, &dev_attr_output8);
	} 

	if (ifkit->inputs >= 4) {
		device_create_file(&intf->dev, &dev_attr_input1);
		device_create_file(&intf->dev, &dev_attr_input2);
		device_create_file(&intf->dev, &dev_attr_input3);
		device_create_file(&intf->dev, &dev_attr_input4);
	}
	if (ifkit->inputs == 8) {
		device_create_file(&intf->dev, &dev_attr_input5);
		device_create_file(&intf->dev, &dev_attr_input6);
		device_create_file(&intf->dev, &dev_attr_input7);
		device_create_file(&intf->dev, &dev_attr_input8);
	}

	if (ifkit->sensors >= 4) {
		device_create_file(&intf->dev, &dev_attr_sensor1);
		device_create_file(&intf->dev, &dev_attr_sensor2);
		device_create_file(&intf->dev, &dev_attr_sensor3);
		device_create_file(&intf->dev, &dev_attr_sensor4);
	}
	if (ifkit->sensors >= 7) {
		device_create_file(&intf->dev, &dev_attr_sensor5);
		device_create_file(&intf->dev, &dev_attr_sensor6);
		device_create_file(&intf->dev, &dev_attr_sensor7);
	}
	if (ifkit->sensors == 8) {
		device_create_file(&intf->dev, &dev_attr_sensor8);
	}

	if (ifkit->has_lcd)
		device_create_file(&intf->dev, &dev_attr_lcd);

	dev_info(&intf->dev, "USB PhidgetInterfaceKit %d/%d/%d attached\n",
			ifkit->sensors, ifkit->inputs, ifkit->outputs);

	return 0;
}

static void interfacekit_disconnect(struct usb_interface *interface)
{
	struct phidget_interfacekit *kit;

	kit = usb_get_intfdata(interface);
	usb_set_intfdata(interface, NULL);
	if (!kit)
		return;

	if (kit->ifkit->outputs >= 4) {
		device_remove_file(&interface->dev, &dev_attr_output1);
		device_remove_file(&interface->dev, &dev_attr_output2);
		device_remove_file(&interface->dev, &dev_attr_output3);
		device_remove_file(&interface->dev, &dev_attr_output4);
	}
	if (kit->ifkit->outputs == 8) {
		device_remove_file(&interface->dev, &dev_attr_output5);
		device_remove_file(&interface->dev, &dev_attr_output6);
		device_remove_file(&interface->dev, &dev_attr_output7);
		device_remove_file(&interface->dev, &dev_attr_output8);
	}

	if (kit->ifkit->inputs >= 4) {
		device_remove_file(&interface->dev, &dev_attr_input1);
		device_remove_file(&interface->dev, &dev_attr_input2);
		device_remove_file(&interface->dev, &dev_attr_input3);
		device_remove_file(&interface->dev, &dev_attr_input4);
	}
	if (kit->ifkit->inputs == 8) {
		device_remove_file(&interface->dev, &dev_attr_input5);
		device_remove_file(&interface->dev, &dev_attr_input6);
		device_remove_file(&interface->dev, &dev_attr_input7);
		device_remove_file(&interface->dev, &dev_attr_input8);
	}

	if (kit->ifkit->sensors >= 4) {
		device_remove_file(&interface->dev, &dev_attr_sensor1);
		device_remove_file(&interface->dev, &dev_attr_sensor2);
		device_remove_file(&interface->dev, &dev_attr_sensor3);
		device_remove_file(&interface->dev, &dev_attr_sensor4);
	}
	if (kit->ifkit->sensors >= 7) {
		device_remove_file(&interface->dev, &dev_attr_sensor5);
		device_remove_file(&interface->dev, &dev_attr_sensor6);
		device_remove_file(&interface->dev, &dev_attr_sensor7);
	}
	if (kit->ifkit->sensors == 8) {
		device_remove_file(&interface->dev, &dev_attr_sensor8);
	}
	if (kit->ifkit->has_lcd)
		device_remove_file(&interface->dev, &dev_attr_lcd);

	dev_info(&interface->dev, "USB PhidgetInterfaceKit %d/%d/%d detached\n",
		kit->ifkit->sensors, kit->ifkit->inputs, kit->ifkit->outputs);

	usb_kill_urb(kit->irq);
	usb_free_urb(kit->irq);
	usb_buffer_free(kit->udev, 8, kit->data, kit->data_dma);

	usb_put_dev(kit->udev);
	kfree(kit);
}

static struct usb_driver interfacekit_driver = {
	.owner = THIS_MODULE,
	.name = "phidgetkit",
	.probe = interfacekit_probe,
	.disconnect = interfacekit_disconnect,
	.id_table = id_table
};

static int __init interfacekit_init(void)
{
	int retval = 0;

	retval = usb_register(&interfacekit_driver);
	if (retval)
		err("usb_register failed. Error number %d", retval);

	return retval;
}

static void __exit interfacekit_exit(void)
{
	usb_deregister(&interfacekit_driver);
}

module_init(interfacekit_init);
module_exit(interfacekit_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");