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Commit df785c7a authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: dt9812: move the usb framework functions to EOF 



In preparation of converting this manually attached comedi driver
into an auto attached comedi usb driver, move the usb framework
functions to the end of the file.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent dabf2aa3

drivers/staging/comedi/drivers/dt9812.c

+201 −206
Original line number Diff line number Diff line
@@ -262,13 +262,6 @@ struct dt9812_usb_cmd { 


static DEFINE_SEMAPHORE(dt9812_mutex);



static const struct usb_device_id dt9812_table[] = {

	{USB_DEVICE(0x0867, 0x9812)},

	{}			/* Terminating entry */

};



MODULE_DEVICE_TABLE(usb, dt9812_table);



struct usb_dt9812 {

	struct slot_dt9812 *slot;

	struct usb_device *udev;
@@ -661,205 +654,6 @@ static int dt9812_analog_out(struct slot_dt9812 *slot, int channel, u16 value) 
	return result;

}



/*

 * USB framework functions

 */



static int dt9812_probe(struct usb_interface *interface,

			const struct usb_device_id *id)

{

	int retval = -ENOMEM;

	struct usb_dt9812 *dev = NULL;

	struct usb_host_interface *iface_desc;

	struct usb_endpoint_descriptor *endpoint;

	int i;

	u8 fw;



	/* allocate memory for our device state and initialize it */

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);

	if (dev == NULL)

		goto error;



	kref_init(&dev->kref);



	dev->udev = usb_get_dev(interface_to_usbdev(interface));

	dev->interface = interface;



	/* Check endpoints */

	iface_desc = interface->cur_altsetting;



	if (iface_desc->desc.bNumEndpoints != 5) {

		dev_err(&interface->dev, "Wrong number of endpoints.\n");

		retval = -ENODEV;

		goto error;

	}



	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {

		int direction = -1;

		endpoint = &iface_desc->endpoint[i].desc;

		switch (i) {

		case 0:

			direction = USB_DIR_IN;

			dev->message_pipe.addr = endpoint->bEndpointAddress;

			dev->message_pipe.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);



			break;

		case 1:

			direction = USB_DIR_OUT;

			dev->command_write.addr = endpoint->bEndpointAddress;

			dev->command_write.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 2:

			direction = USB_DIR_IN;

			dev->command_read.addr = endpoint->bEndpointAddress;

			dev->command_read.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 3:

			direction = USB_DIR_OUT;

			dev->write_stream.addr = endpoint->bEndpointAddress;

			dev->write_stream.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 4:

			direction = USB_DIR_IN;

			dev->read_stream.addr = endpoint->bEndpointAddress;

			dev->read_stream.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		}

		if ((endpoint->bEndpointAddress & USB_DIR_IN) != direction) {

			dev_err(&interface->dev,

				"Endpoint has wrong direction.\n");

			retval = -ENODEV;

			goto error;

		}

	}

	if (dt9812_read_info(dev, 0, &fw, sizeof(fw)) != 0) {

		/*

		 * Seems like a configuration reset is necessary if driver is

		 * reloaded while device is attached

		 */

		usb_reset_configuration(dev->udev);

		for (i = 0; i < 10; i++) {

			retval = dt9812_read_info(dev, 1, &fw, sizeof(fw));

			if (retval == 0) {

				dev_info(&interface->dev,

					 "usb_reset_configuration succeeded "

					 "after %d iterations\n", i);

				break;

			}

		}

	}



	if (dt9812_read_info(dev, 1, &dev->vendor, sizeof(dev->vendor)) != 0) {

		dev_err(&interface->dev, "Failed to read vendor.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 3, &dev->product, sizeof(dev->product)) != 0) {

		dev_err(&interface->dev, "Failed to read product.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 5, &dev->device, sizeof(dev->device)) != 0) {

		dev_err(&interface->dev, "Failed to read device.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 7, &dev->serial, sizeof(dev->serial)) != 0) {

		dev_err(&interface->dev, "Failed to read serial.\n");

		retval = -ENODEV;

		goto error;

	}



	dev->vendor = le16_to_cpu(dev->vendor);

	dev->product = le16_to_cpu(dev->product);

	dev->device = le16_to_cpu(dev->device);

	dev->serial = le32_to_cpu(dev->serial);

	switch (dev->device) {

	case DT9812_DEVID_DT9812_10:

		dev->analog_out_shadow[0] = 0x0800;

		dev->analog_out_shadow[1] = 0x800;

		break;

	case DT9812_DEVID_DT9812_2PT5:

		dev->analog_out_shadow[0] = 0x0000;

		dev->analog_out_shadow[1] = 0x0000;

		break;

	}

	dev->digital_out_shadow = 0;



	/* save our data pointer in this interface device */

	usb_set_intfdata(interface, dev);



	/* let the user know what node this device is now attached to */

	dev_info(&interface->dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",

		 dev->vendor, dev->product, dev->device, dev->serial);



	down(&dt9812_mutex);

	{

		/* Find a slot for the USB device */

		struct slot_dt9812 *first = NULL;

		struct slot_dt9812 *best = NULL;



		for (i = 0; i < DT9812_NUM_SLOTS; i++) {

			if (!first && !dt9812[i].usb && dt9812[i].serial == 0)

				first = &dt9812[i];

			if (!best && dt9812[i].serial == dev->serial)

				best = &dt9812[i];

		}



		if (!best)

			best = first;



		if (best) {

			down(&best->mutex);

			best->usb = dev;

			dev->slot = best;

			up(&best->mutex);

		}

	}

	up(&dt9812_mutex);



	return 0;



error:

	if (dev)

		kref_put(&dev->kref, dt9812_delete);

	return retval;

}



static void dt9812_disconnect(struct usb_interface *interface)

{

	struct usb_dt9812 *dev;

	int minor = interface->minor;



	down(&dt9812_mutex);

	dev = usb_get_intfdata(interface);

	if (dev->slot) {

		down(&dev->slot->mutex);

		dev->slot->usb = NULL;

		up(&dev->slot->mutex);

		dev->slot = NULL;

	}

	usb_set_intfdata(interface, NULL);

	up(&dt9812_mutex);



	/* queue final destruction */

	kref_put(&dev->kref, dt9812_delete);



	dev_info(&interface->dev, "USB Dt9812 #%d now disconnected\n", minor);

}



static struct usb_driver dt9812_usb_driver = {

	.name = "dt9812",

	.probe = dt9812_probe,

	.disconnect = dt9812_disconnect,

	.id_table = dt9812_table,

};



/*

 * Comedi functions

 */
@@ -1107,6 +901,207 @@ static struct comedi_driver dt9812_comedi_driver = { 
	.detach = dt9812_detach,

};



static int dt9812_probe(struct usb_interface *interface,

			const struct usb_device_id *id)

{

	int retval = -ENOMEM;

	struct usb_dt9812 *dev = NULL;

	struct usb_host_interface *iface_desc;

	struct usb_endpoint_descriptor *endpoint;

	int i;

	u8 fw;



	/* allocate memory for our device state and initialize it */

	dev = kzalloc(sizeof(*dev), GFP_KERNEL);

	if (dev == NULL)

		goto error;



	kref_init(&dev->kref);



	dev->udev = usb_get_dev(interface_to_usbdev(interface));

	dev->interface = interface;



	/* Check endpoints */

	iface_desc = interface->cur_altsetting;



	if (iface_desc->desc.bNumEndpoints != 5) {

		dev_err(&interface->dev, "Wrong number of endpoints.\n");

		retval = -ENODEV;

		goto error;

	}



	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {

		int direction = -1;

		endpoint = &iface_desc->endpoint[i].desc;

		switch (i) {

		case 0:

			direction = USB_DIR_IN;

			dev->message_pipe.addr = endpoint->bEndpointAddress;

			dev->message_pipe.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);



			break;

		case 1:

			direction = USB_DIR_OUT;

			dev->command_write.addr = endpoint->bEndpointAddress;

			dev->command_write.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 2:

			direction = USB_DIR_IN;

			dev->command_read.addr = endpoint->bEndpointAddress;

			dev->command_read.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 3:

			direction = USB_DIR_OUT;

			dev->write_stream.addr = endpoint->bEndpointAddress;

			dev->write_stream.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		case 4:

			direction = USB_DIR_IN;

			dev->read_stream.addr = endpoint->bEndpointAddress;

			dev->read_stream.size =

			    le16_to_cpu(endpoint->wMaxPacketSize);

			break;

		}

		if ((endpoint->bEndpointAddress & USB_DIR_IN) != direction) {

			dev_err(&interface->dev,

				"Endpoint has wrong direction.\n");

			retval = -ENODEV;

			goto error;

		}

	}

	if (dt9812_read_info(dev, 0, &fw, sizeof(fw)) != 0) {

		/*

		 * Seems like a configuration reset is necessary if driver is

		 * reloaded while device is attached

		 */

		usb_reset_configuration(dev->udev);

		for (i = 0; i < 10; i++) {

			retval = dt9812_read_info(dev, 1, &fw, sizeof(fw));

			if (retval == 0) {

				dev_info(&interface->dev,

					 "usb_reset_configuration succeeded "

					 "after %d iterations\n", i);

				break;

			}

		}

	}



	if (dt9812_read_info(dev, 1, &dev->vendor, sizeof(dev->vendor)) != 0) {

		dev_err(&interface->dev, "Failed to read vendor.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 3, &dev->product, sizeof(dev->product)) != 0) {

		dev_err(&interface->dev, "Failed to read product.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 5, &dev->device, sizeof(dev->device)) != 0) {

		dev_err(&interface->dev, "Failed to read device.\n");

		retval = -ENODEV;

		goto error;

	}

	if (dt9812_read_info(dev, 7, &dev->serial, sizeof(dev->serial)) != 0) {

		dev_err(&interface->dev, "Failed to read serial.\n");

		retval = -ENODEV;

		goto error;

	}



	dev->vendor = le16_to_cpu(dev->vendor);

	dev->product = le16_to_cpu(dev->product);

	dev->device = le16_to_cpu(dev->device);

	dev->serial = le32_to_cpu(dev->serial);

	switch (dev->device) {

	case DT9812_DEVID_DT9812_10:

		dev->analog_out_shadow[0] = 0x0800;

		dev->analog_out_shadow[1] = 0x800;

		break;

	case DT9812_DEVID_DT9812_2PT5:

		dev->analog_out_shadow[0] = 0x0000;

		dev->analog_out_shadow[1] = 0x0000;

		break;

	}

	dev->digital_out_shadow = 0;



	/* save our data pointer in this interface device */

	usb_set_intfdata(interface, dev);



	/* let the user know what node this device is now attached to */

	dev_info(&interface->dev, "USB DT9812 (%4.4x.%4.4x.%4.4x) #0x%8.8x\n",

		 dev->vendor, dev->product, dev->device, dev->serial);



	down(&dt9812_mutex);

	{

		/* Find a slot for the USB device */

		struct slot_dt9812 *first = NULL;

		struct slot_dt9812 *best = NULL;



		for (i = 0; i < DT9812_NUM_SLOTS; i++) {

			if (!first && !dt9812[i].usb && dt9812[i].serial == 0)

				first = &dt9812[i];

			if (!best && dt9812[i].serial == dev->serial)

				best = &dt9812[i];

		}



		if (!best)

			best = first;



		if (best) {

			down(&best->mutex);

			best->usb = dev;

			dev->slot = best;

			up(&best->mutex);

		}

	}

	up(&dt9812_mutex);



	return 0;



error:

	if (dev)

		kref_put(&dev->kref, dt9812_delete);

	return retval;

}



static void dt9812_disconnect(struct usb_interface *interface)

{

	struct usb_dt9812 *dev;

	int minor = interface->minor;



	down(&dt9812_mutex);

	dev = usb_get_intfdata(interface);

	if (dev->slot) {

		down(&dev->slot->mutex);

		dev->slot->usb = NULL;

		up(&dev->slot->mutex);

		dev->slot = NULL;

	}

	usb_set_intfdata(interface, NULL);

	up(&dt9812_mutex);



	/* queue final destruction */

	kref_put(&dev->kref, dt9812_delete);



	dev_info(&interface->dev, "USB Dt9812 #%d now disconnected\n", minor);

}



static const struct usb_device_id dt9812_table[] = {

	{ USB_DEVICE(0x0867, 0x9812) },

	{ }

};

MODULE_DEVICE_TABLE(usb, dt9812_table);



static struct usb_driver dt9812_usb_driver = {

	.name		= "dt9812",

	.id_table	= dt9812_table,

	.probe		= dt9812_probe,

	.disconnect	= dt9812_disconnect,

};



static int __init usb_dt9812_init(void)

{

	int i;