[thirdparty/kernel/stable.git] / drivers / gpu / drm / udl / udl_main.c

/*
 * Copyright (C) 2012 Red Hat
 *
 * based in parts on udlfb.c:
 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License v2. See the file COPYING in the main directory of this archive for
 * more details.
 */
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_probe_helper.h>
#include "udl_drv.h"

/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
#define BULK_SIZE 512

#define NR_USB_REQUEST_CHANNEL 0x12

#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
#define WRITES_IN_FLIGHT (4)
#define MAX_VENDOR_DESCRIPTOR_SIZE 256

#define GET_URB_TIMEOUT	HZ
#define FREE_URB_TIMEOUT (HZ*2)

static int udl_parse_vendor_descriptor(struct drm_device *dev,
				       struct usb_device *usbdev)
{
	struct udl_device *udl = dev->dev_private;
	char *desc;
	char *buf;
	char *desc_end;

	u8 total_len = 0;

	buf = kzalloc(MAX_VENDOR_DESCRIPTOR_SIZE, GFP_KERNEL);
	if (!buf)
		return false;
	desc = buf;

	total_len = usb_get_descriptor(usbdev, 0x5f, /* vendor specific */
				    0, desc, MAX_VENDOR_DESCRIPTOR_SIZE);
	if (total_len > 5) {
		DRM_INFO("vendor descriptor length:%x data:%11ph\n",
			total_len, desc);

		if ((desc[0] != total_len) || /* descriptor length */
		    (desc[1] != 0x5f) ||   /* vendor descriptor type */
		    (desc[2] != 0x01) ||   /* version (2 bytes) */
		    (desc[3] != 0x00) ||
		    (desc[4] != total_len - 2)) /* length after type */
			goto unrecognized;

		desc_end = desc + total_len;
		desc += 5; /* the fixed header we've already parsed */

		while (desc < desc_end) {
			u8 length;
			u16 key;

			key = le16_to_cpu(*((u16 *) desc));
			desc += sizeof(u16);
			length = *desc;
			desc++;

			switch (key) {
			case 0x0200: { /* max_area */
				u32 max_area;
				max_area = le32_to_cpu(*((u32 *)desc));
				DRM_DEBUG("DL chip limited to %d pixel modes\n",
					max_area);
				udl->sku_pixel_limit = max_area;
				break;
			}
			default:
				break;
			}
			desc += length;
		}
	}

	goto success;

unrecognized:
	/* allow udlfb to load for now even if firmware unrecognized */
	DRM_ERROR("Unrecognized vendor firmware descriptor\n");

success:
	kfree(buf);
	return true;
}

/*
 * Need to ensure a channel is selected before submitting URBs
 */
static int udl_select_std_channel(struct udl_device *udl)
{
	int ret;
	static const u8 set_def_chn[] = {0x57, 0xCD, 0xDC, 0xA7,
					 0x1C, 0x88, 0x5E, 0x15,
					 0x60, 0xFE, 0xC6, 0x97,
					 0x16, 0x3D, 0x47, 0xF2};
	void *sendbuf;

	sendbuf = kmemdup(set_def_chn, sizeof(set_def_chn), GFP_KERNEL);
	if (!sendbuf)
		return -ENOMEM;

	ret = usb_control_msg(udl->udev,
			      usb_sndctrlpipe(udl->udev, 0),
			      NR_USB_REQUEST_CHANNEL,
			      (USB_DIR_OUT | USB_TYPE_VENDOR), 0, 0,
			      sendbuf, sizeof(set_def_chn),
			      USB_CTRL_SET_TIMEOUT);
	kfree(sendbuf);
	return ret < 0 ? ret : 0;
}

static void udl_release_urb_work(struct work_struct *work)
{
	struct urb_node *unode = container_of(work, struct urb_node,
					      release_urb_work.work);

	up(&unode->dev->urbs.limit_sem);
}

void udl_urb_completion(struct urb *urb)
{
	struct urb_node *unode = urb->context;
	struct udl_device *udl = unode->dev;
	unsigned long flags;

	/* sync/async unlink faults aren't errors */
	if (urb->status) {
		if (!(urb->status == -ENOENT ||
		    urb->status == -ECONNRESET ||
		    urb->status == -ESHUTDOWN)) {
			DRM_ERROR("%s - nonzero write bulk status received: %d\n",
				__func__, urb->status);
			atomic_set(&udl->lost_pixels, 1);
		}
	}

	urb->transfer_buffer_length = udl->urbs.size; /* reset to actual */

	spin_lock_irqsave(&udl->urbs.lock, flags);
	list_add_tail(&unode->entry, &udl->urbs.list);
	udl->urbs.available++;
	spin_unlock_irqrestore(&udl->urbs.lock, flags);

#if 0
	/*
	 * When using fb_defio, we deadlock if up() is called
	 * while another is waiting. So queue to another process.
	 */
	if (fb_defio)
		schedule_delayed_work(&unode->release_urb_work, 0);
	else
#endif
		up(&udl->urbs.limit_sem);
}

static void udl_free_urb_list(struct drm_device *dev)
{
	struct udl_device *udl = dev->dev_private;
	int count = udl->urbs.count;
	struct list_head *node;
	struct urb_node *unode;
	struct urb *urb;

	DRM_DEBUG("Waiting for completes and freeing all render urbs\n");

	/* keep waiting and freeing, until we've got 'em all */
	while (count--) {
		down(&udl->urbs.limit_sem);

		spin_lock_irq(&udl->urbs.lock);

		node = udl->urbs.list.next; /* have reserved one with sem */
		list_del_init(node);

		spin_unlock_irq(&udl->urbs.lock);

		unode = list_entry(node, struct urb_node, entry);
		urb = unode->urb;

		/* Free each separately allocated piece */
		usb_free_coherent(urb->dev, udl->urbs.size,
				  urb->transfer_buffer, urb->transfer_dma);
		usb_free_urb(urb);
		kfree(node);
	}
	udl->urbs.count = 0;
}

static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)
{
	struct udl_device *udl = dev->dev_private;
	struct urb *urb;
	struct urb_node *unode;
	char *buf;
	size_t wanted_size = count * size;

	spin_lock_init(&udl->urbs.lock);

retry:
	udl->urbs.size = size;
	INIT_LIST_HEAD(&udl->urbs.list);

	sema_init(&udl->urbs.limit_sem, 0);
	udl->urbs.count = 0;
	udl->urbs.available = 0;

	while (udl->urbs.count * size < wanted_size) {
		unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL);
		if (!unode)
			break;
		unode->dev = udl;

		INIT_DELAYED_WORK(&unode->release_urb_work,
			  udl_release_urb_work);

		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb) {
			kfree(unode);
			break;
		}
		unode->urb = urb;

		buf = usb_alloc_coherent(udl->udev, size, GFP_KERNEL,
					 &urb->transfer_dma);
		if (!buf) {
			kfree(unode);
			usb_free_urb(urb);
			if (size > PAGE_SIZE) {
				size /= 2;
				udl_free_urb_list(dev);
				goto retry;
			}
			break;
		}

		/* urb->transfer_buffer_length set to actual before submit */
		usb_fill_bulk_urb(urb, udl->udev, usb_sndbulkpipe(udl->udev, 1),
			buf, size, udl_urb_completion, unode);
		urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

		list_add_tail(&unode->entry, &udl->urbs.list);

		up(&udl->urbs.limit_sem);
		udl->urbs.count++;
		udl->urbs.available++;
	}

	DRM_DEBUG("allocated %d %d byte urbs\n", udl->urbs.count, (int) size);

	return udl->urbs.count;
}

struct urb *udl_get_urb(struct drm_device *dev)
{
	struct udl_device *udl = dev->dev_private;
	int ret = 0;
	struct list_head *entry;
	struct urb_node *unode;
	struct urb *urb = NULL;

	/* Wait for an in-flight buffer to complete and get re-queued */
	ret = down_timeout(&udl->urbs.limit_sem, GET_URB_TIMEOUT);
	if (ret) {
		atomic_set(&udl->lost_pixels, 1);
		DRM_INFO("wait for urb interrupted: %x available: %d\n",
		       ret, udl->urbs.available);
		goto error;
	}

	spin_lock_irq(&udl->urbs.lock);

	BUG_ON(list_empty(&udl->urbs.list)); /* reserved one with limit_sem */
	entry = udl->urbs.list.next;
	list_del_init(entry);
	udl->urbs.available--;

	spin_unlock_irq(&udl->urbs.lock);

	unode = list_entry(entry, struct urb_node, entry);
	urb = unode->urb;

error:
	return urb;
}

int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len)
{
	struct udl_device *udl = dev->dev_private;
	int ret;

	BUG_ON(len > udl->urbs.size);

	urb->transfer_buffer_length = len; /* set to actual payload len */
	ret = usb_submit_urb(urb, GFP_ATOMIC);
	if (ret) {
		udl_urb_completion(urb); /* because no one else will */
		atomic_set(&udl->lost_pixels, 1);
		DRM_ERROR("usb_submit_urb error %x\n", ret);
	}
	return ret;
}

int udl_driver_load(struct drm_device *dev, unsigned long flags)
{
	struct usb_device *udev = (void*)flags;
	struct udl_device *udl;
	int ret = -ENOMEM;

	DRM_DEBUG("\n");
	udl = kzalloc(sizeof(struct udl_device), GFP_KERNEL);
	if (!udl)
		return -ENOMEM;

	udl->udev = udev;
	udl->ddev = dev;
	dev->dev_private = udl;

	mutex_init(&udl->gem_lock);

	if (!udl_parse_vendor_descriptor(dev, udl->udev)) {
		ret = -ENODEV;
		DRM_ERROR("firmware not recognized. Assume incompatible device\n");
		goto err;
	}

	if (udl_select_std_channel(udl))
		DRM_ERROR("Selecting channel failed\n");

	if (!udl_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) {
		DRM_ERROR("udl_alloc_urb_list failed\n");
		goto err;
	}

	DRM_DEBUG("\n");
	ret = udl_modeset_init(dev);
	if (ret)
		goto err;

	ret = udl_fbdev_init(dev);
	if (ret)
		goto err;

	drm_kms_helper_poll_init(dev);

	return 0;

err:
	if (udl->urbs.count)
		udl_free_urb_list(dev);
	kfree(udl);
	DRM_ERROR("%d\n", ret);
	return ret;
}

int udl_drop_usb(struct drm_device *dev)
{
	udl_free_urb_list(dev);
	return 0;
}

void udl_driver_unload(struct drm_device *dev)
{
	struct udl_device *udl = dev->dev_private;

	drm_kms_helper_poll_fini(dev);

	if (udl->urbs.count)
		udl_free_urb_list(dev);

	udl_fbdev_cleanup(dev);
	kfree(udl);
}

void udl_driver_release(struct drm_device *dev)
{
	udl_modeset_cleanup(dev);
	drm_dev_fini(dev);
	kfree(dev);
}
Commit	Line	Data
5320918b DA	1	/*
	2	* Copyright (C) 2012 Red Hat
	3	*
	4	* based in parts on udlfb.c:
	5	* Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
	6	* Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
	7	* Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
	8	*
	9	* This file is subject to the terms and conditions of the GNU General Public
	10	* License v2. See the file COPYING in the main directory of this archive for
	11	* more details.
	12	*/
760285e7	13	#include <drm/drmP.h>
afdfc4c6	14	#include <drm/drm_crtc_helper.h>
fcd70cd3	15	#include <drm/drm_probe_helper.h>
5320918b DA	16	#include "udl_drv.h"
	17
	18	/* -BULK_SIZE as per usb-skeleton. Can we get full page and avoid overhead? */
	19	#define BULK_SIZE 512
	20
d1c151dc JL	21	#define NR_USB_REQUEST_CHANNEL 0x12
d1c151dc JL	22
5320918b DA	23	#define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE)
	24	#define WRITES_IN_FLIGHT (4)
	25	#define MAX_VENDOR_DESCRIPTOR_SIZE 256
	26
	27	#define GET_URB_TIMEOUT HZ
	28	#define FREE_URB_TIMEOUT (HZ*2)
	29
	30	static int udl_parse_vendor_descriptor(struct drm_device *dev,
	31	struct usb_device *usbdev)
	32	{
	33	struct udl_device *udl = dev->dev_private;
	34	char *desc;
	35	char *buf;
	36	char *desc_end;
	37
	38	u8 total_len = 0;
	39
	40	buf = kzalloc(MAX_VENDOR_DESCRIPTOR_SIZE, GFP_KERNEL);
	41	if (!buf)
	42	return false;
	43	desc = buf;
	44
	45	total_len = usb_get_descriptor(usbdev, 0x5f, /* vendor specific */
	46	0, desc, MAX_VENDOR_DESCRIPTOR_SIZE);
	47	if (total_len > 5) {
08fcd72b AS	48	DRM_INFO("vendor descriptor length:%x data:%11ph\n",
08fcd72b AS	49	total_len, desc);
5320918b DA	50
	51	if ((desc[0] != total_len) \|\| /* descriptor length */
	52	(desc[1] != 0x5f) \|\| /* vendor descriptor type */
	53	(desc[2] != 0x01) \|\| /* version (2 bytes) */
	54	(desc[3] != 0x00) \|\|
	55	(desc[4] != total_len - 2)) /* length after type */
	56	goto unrecognized;
	57
	58	desc_end = desc + total_len;
	59	desc += 5; /* the fixed header we've already parsed */
	60
	61	while (desc < desc_end) {
	62	u8 length;
	63	u16 key;
	64
d42f0349	65	key = le16_to_cpu(((u16 ) desc));
5320918b DA	66	desc += sizeof(u16);
	67	length = *desc;
	68	desc++;
	69
	70	switch (key) {
	71	case 0x0200: { /* max_area */
	72	u32 max_area;
	73	max_area = le32_to_cpu(((u32 )desc));
	74	DRM_DEBUG("DL chip limited to %d pixel modes\n",
	75	max_area);
	76	udl->sku_pixel_limit = max_area;
	77	break;
	78	}
	79	default:
	80	break;
	81	}
	82	desc += length;
	83	}
	84	}
	85
	86	goto success;
	87
	88	unrecognized:
	89	/* allow udlfb to load for now even if firmware unrecognized */
	90	DRM_ERROR("Unrecognized vendor firmware descriptor\n");
	91
	92	success:
	93	kfree(buf);
	94	return true;
	95	}
	96
d1c151dc JL	97	/*
	98	* Need to ensure a channel is selected before submitting URBs
	99	*/
	100	static int udl_select_std_channel(struct udl_device *udl)
	101	{
	102	int ret;
e5581fe2 DA	103	static const u8 set_def_chn[] = {0x57, 0xCD, 0xDC, 0xA7,
	104	0x1C, 0x88, 0x5E, 0x15,
	105	0x60, 0xFE, 0xC6, 0x97,
	106	0x16, 0x3D, 0x47, 0xF2};
	107	void *sendbuf;
	108
	109	sendbuf = kmemdup(set_def_chn, sizeof(set_def_chn), GFP_KERNEL);
	110	if (!sendbuf)
	111	return -ENOMEM;
d1c151dc JL	112
	113	ret = usb_control_msg(udl->udev,
	114	usb_sndctrlpipe(udl->udev, 0),
	115	NR_USB_REQUEST_CHANNEL,
	116	(USB_DIR_OUT \| USB_TYPE_VENDOR), 0, 0,
e5581fe2	117	sendbuf, sizeof(set_def_chn),
d1c151dc	118	USB_CTRL_SET_TIMEOUT);
e5581fe2	119	kfree(sendbuf);
d1c151dc JL	120	return ret < 0 ? ret : 0;
	121	}
	122
5320918b DA	123	static void udl_release_urb_work(struct work_struct *work)
	124	{
	125	struct urb_node *unode = container_of(work, struct urb_node,
	126	release_urb_work.work);
	127
	128	up(&unode->dev->urbs.limit_sem);
	129	}
	130
	131	void udl_urb_completion(struct urb *urb)
	132	{
	133	struct urb_node *unode = urb->context;
	134	struct udl_device *udl = unode->dev;
	135	unsigned long flags;
	136
	137	/* sync/async unlink faults aren't errors */
	138	if (urb->status) {
	139	if (!(urb->status == -ENOENT \|\|
	140	urb->status == -ECONNRESET \|\|
	141	urb->status == -ESHUTDOWN)) {
	142	DRM_ERROR("%s - nonzero write bulk status received: %d\n",
	143	__func__, urb->status);
	144	atomic_set(&udl->lost_pixels, 1);
	145	}
	146	}
	147
	148	urb->transfer_buffer_length = udl->urbs.size; /* reset to actual */
	149
	150	spin_lock_irqsave(&udl->urbs.lock, flags);
	151	list_add_tail(&unode->entry, &udl->urbs.list);
	152	udl->urbs.available++;
	153	spin_unlock_irqrestore(&udl->urbs.lock, flags);
	154
	155	#if 0
	156	/*
	157	* When using fb_defio, we deadlock if up() is called
	158	* while another is waiting. So queue to another process.
	159	*/
	160	if (fb_defio)
	161	schedule_delayed_work(&unode->release_urb_work, 0);
	162	else
	163	#endif
	164	up(&udl->urbs.limit_sem);
	165	}
	166
	167	static void udl_free_urb_list(struct drm_device *dev)
	168	{
	169	struct udl_device *udl = dev->dev_private;
	170	int count = udl->urbs.count;
	171	struct list_head *node;
	172	struct urb_node *unode;
	173	struct urb *urb;
5320918b DA	174
	175	DRM_DEBUG("Waiting for completes and freeing all render urbs\n");
	176
	177	/* keep waiting and freeing, until we've got 'em all */
	178	while (count--) {
8456b99c	179	down(&udl->urbs.limit_sem);
5320918b	180
c2f53119	181	spin_lock_irq(&udl->urbs.lock);
5320918b DA	182
	183	node = udl->urbs.list.next; /* have reserved one with sem */
	184	list_del_init(node);
	185
c2f53119	186	spin_unlock_irq(&udl->urbs.lock);
5320918b DA	187
	188	unode = list_entry(node, struct urb_node, entry);
	189	urb = unode->urb;
	190
	191	/* Free each separately allocated piece */
	192	usb_free_coherent(urb->dev, udl->urbs.size,
	193	urb->transfer_buffer, urb->transfer_dma);
	194	usb_free_urb(urb);
	195	kfree(node);
	196	}
	197	udl->urbs.count = 0;
	198	}
	199
	200	static int udl_alloc_urb_list(struct drm_device *dev, int count, size_t size)
	201	{
	202	struct udl_device *udl = dev->dev_private;
5320918b DA	203	struct urb *urb;
	204	struct urb_node *unode;
	205	char *buf;
542bb978	206	size_t wanted_size = count * size;
5320918b DA	207
	208	spin_lock_init(&udl->urbs.lock);
	209
542bb978	210	retry:
5320918b DA	211	udl->urbs.size = size;
	212	INIT_LIST_HEAD(&udl->urbs.list);
	213
542bb978 MP	214	sema_init(&udl->urbs.limit_sem, 0);
	215	udl->urbs.count = 0;
	216	udl->urbs.available = 0;
	217
	218	while (udl->urbs.count * size < wanted_size) {
5320918b DA	219	unode = kzalloc(sizeof(struct urb_node), GFP_KERNEL);
	220	if (!unode)
	221	break;
	222	unode->dev = udl;
	223
	224	INIT_DELAYED_WORK(&unode->release_urb_work,
	225	udl_release_urb_work);
	226
	227	urb = usb_alloc_urb(0, GFP_KERNEL);
	228	if (!urb) {
	229	kfree(unode);
	230	break;
	231	}
	232	unode->urb = urb;
	233
542bb978	234	buf = usb_alloc_coherent(udl->udev, size, GFP_KERNEL,
5320918b DA	235	&urb->transfer_dma);
	236	if (!buf) {
	237	kfree(unode);
	238	usb_free_urb(urb);
542bb978 MP	239	if (size > PAGE_SIZE) {
	240	size /= 2;
	241	udl_free_urb_list(dev);
	242	goto retry;
	243	}
5320918b DA	244	break;
	245	}
	246
	247	/* urb->transfer_buffer_length set to actual before submit */
d4f68a75	248	usb_fill_bulk_urb(urb, udl->udev, usb_sndbulkpipe(udl->udev, 1),
5320918b DA	249	buf, size, udl_urb_completion, unode);
	250	urb->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;
	251
	252	list_add_tail(&unode->entry, &udl->urbs.list);
	253
542bb978 MP	254	up(&udl->urbs.limit_sem);
	255	udl->urbs.count++;
	256	udl->urbs.available++;
5320918b DA	257	}
5320918b DA	258
542bb978	259	DRM_DEBUG("allocated %d %d byte urbs\n", udl->urbs.count, (int) size);
5320918b	260
542bb978	261	return udl->urbs.count;
5320918b DA	262	}
	263
	264	struct urb udl_get_urb(struct drm_device dev)
	265	{
	266	struct udl_device *udl = dev->dev_private;
	267	int ret = 0;
	268	struct list_head *entry;
	269	struct urb_node *unode;
	270	struct urb *urb = NULL;
5320918b DA	271
	272	/* Wait for an in-flight buffer to complete and get re-queued */
	273	ret = down_timeout(&udl->urbs.limit_sem, GET_URB_TIMEOUT);
	274	if (ret) {
	275	atomic_set(&udl->lost_pixels, 1);
	276	DRM_INFO("wait for urb interrupted: %x available: %d\n",
	277	ret, udl->urbs.available);
	278	goto error;
	279	}
	280
c2f53119	281	spin_lock_irq(&udl->urbs.lock);
5320918b DA	282
	283	BUG_ON(list_empty(&udl->urbs.list)); /* reserved one with limit_sem */
	284	entry = udl->urbs.list.next;
	285	list_del_init(entry);
	286	udl->urbs.available--;
	287
c2f53119	288	spin_unlock_irq(&udl->urbs.lock);
5320918b DA	289
	290	unode = list_entry(entry, struct urb_node, entry);
	291	urb = unode->urb;
	292
	293	error:
	294	return urb;
	295	}
	296
	297	int udl_submit_urb(struct drm_device dev, struct urb urb, size_t len)
	298	{
	299	struct udl_device *udl = dev->dev_private;
	300	int ret;
	301
	302	BUG_ON(len > udl->urbs.size);
	303
	304	urb->transfer_buffer_length = len; /* set to actual payload len */
	305	ret = usb_submit_urb(urb, GFP_ATOMIC);
	306	if (ret) {
	307	udl_urb_completion(urb); /* because no one else will */
	308	atomic_set(&udl->lost_pixels, 1);
	309	DRM_ERROR("usb_submit_urb error %x\n", ret);
	310	}
	311	return ret;
	312	}
	313
	314	int udl_driver_load(struct drm_device *dev, unsigned long flags)
	315	{
d4f68a75	316	struct usb_device udev = (void)flags;
5320918b	317	struct udl_device *udl;
737583f0	318	int ret = -ENOMEM;
5320918b DA	319
	320	DRM_DEBUG("\n");
	321	udl = kzalloc(sizeof(struct udl_device), GFP_KERNEL);
	322	if (!udl)
	323	return -ENOMEM;
	324
d4f68a75	325	udl->udev = udev;
5320918b DA	326	udl->ddev = dev;
	327	dev->dev_private = udl;
	328
ae358dac DV	329	mutex_init(&udl->gem_lock);
ae358dac DV	330
d4f68a75	331	if (!udl_parse_vendor_descriptor(dev, udl->udev)) {
e39a52da	332	ret = -ENODEV;
5320918b DA	333	DRM_ERROR("firmware not recognized. Assume incompatible device\n");
	334	goto err;
	335	}
	336
d1c151dc JL	337	if (udl_select_std_channel(udl))
	338	DRM_ERROR("Selecting channel failed\n");
	339
5320918b	340	if (!udl_alloc_urb_list(dev, WRITES_IN_FLIGHT, MAX_TRANSFER)) {
5320918b DA	341	DRM_ERROR("udl_alloc_urb_list failed\n");
	342	goto err;
	343	}
	344
	345	DRM_DEBUG("\n");
	346	ret = udl_modeset_init(dev);
26507b06 SM	347	if (ret)
26507b06 SM	348	goto err;
5320918b DA	349
5320918b DA	350	ret = udl_fbdev_init(dev);
26507b06 SM	351	if (ret)
	352	goto err;
	353
afdfc4c6 RT	354	drm_kms_helper_poll_init(dev);
afdfc4c6 RT	355
5320918b	356	return 0;
32e932e3	357
5320918b	358	err:
26507b06 SM	359	if (udl->urbs.count)
26507b06 SM	360	udl_free_urb_list(dev);
5320918b DA	361	kfree(udl);
	362	DRM_ERROR("%d\n", ret);
	363	return ret;
	364	}
	365
	366	int udl_drop_usb(struct drm_device *dev)
	367	{
	368	udl_free_urb_list(dev);
	369	return 0;
	370	}
	371
11b3c20b	372	void udl_driver_unload(struct drm_device *dev)
5320918b DA	373	{
	374	struct udl_device *udl = dev->dev_private;
	375
afdfc4c6 RT	376	drm_kms_helper_poll_fini(dev);
afdfc4c6 RT	377
5320918b DA	378	if (udl->urbs.count)
	379	udl_free_urb_list(dev);
	380
	381	udl_fbdev_cleanup(dev);
5320918b	382	kfree(udl);
5320918b	383	}
9b39b013 DA	384
	385	void udl_driver_release(struct drm_device *dev)
	386	{
	387	udl_modeset_cleanup(dev);
	388	drm_dev_fini(dev);
	389	kfree(dev);
	390	}