2 * Greybus "AP" USB driver for "ES2" controller chips
4 * Copyright 2014-2015 Google Inc.
5 * Copyright 2014-2015 Linaro Ltd.
7 * Released under the GPLv2 only.
9 #include <linux/kthread.h>
10 #include <linux/sizes.h>
11 #include <linux/usb.h>
12 #include <linux/kfifo.h>
13 #include <linux/debugfs.h>
14 #include <asm/unaligned.h>
17 #include "kernel_ver.h"
18 #include "connection.h"
19 #include "greybus_trace.h"
21 /* Memory sizes for the buffers sent to/from the ES2 controller */
22 #define ES2_GBUF_MSG_SIZE_MAX 2048
24 static const struct usb_device_id id_table[] = {
25 { USB_DEVICE(0xffff, 0x0002) }, /* Made up number, delete once firmware is fixed to use real number */
26 { USB_DEVICE(0x18d1, 0x1eaf) },
29 MODULE_DEVICE_TABLE(usb, id_table);
31 #define APB1_LOG_SIZE SZ_16K
33 /* Number of bulk in and bulk out couple */
37 * Number of CPort IN urbs in flight at any point in time.
38 * Adjust if we are having stalls in the USB buffer due to not enough urbs in
41 #define NUM_CPORT_IN_URB 4
43 /* Number of CPort OUT urbs in flight at any point in time.
44 * Adjust if we get messages saying we are out of urbs in the system log.
46 #define NUM_CPORT_OUT_URB (8 * NUM_BULKS)
48 /* vendor request APB1 log */
49 #define REQUEST_LOG 0x02
51 /* vendor request to map a cport to bulk in and bulk out endpoints */
52 #define REQUEST_EP_MAPPING 0x03
54 /* vendor request to get the number of cports available */
55 #define REQUEST_CPORT_COUNT 0x04
57 /* vendor request to reset a cport state */
58 #define REQUEST_RESET_CPORT 0x05
60 /* vendor request to time the latency of messages on a given cport */
61 #define REQUEST_LATENCY_TAG_EN 0x06
62 #define REQUEST_LATENCY_TAG_DIS 0x07
65 * @endpoint: bulk in endpoint for CPort data
66 * @urb: array of urbs for the CPort in messages
67 * @buffer: array of buffers for the @cport_in_urb urbs
71 struct urb *urb[NUM_CPORT_IN_URB];
72 u8 *buffer[NUM_CPORT_IN_URB];
76 * @endpoint: bulk out endpoint for CPort data
78 struct es2_cport_out {
83 * es2_ap_dev - ES2 USB Bridge to AP structure
84 * @usb_dev: pointer to the USB device we are.
85 * @usb_intf: pointer to the USB interface we are bound to.
86 * @hd: pointer to our gb_host_device structure
88 * @cport_in: endpoint, urbs and buffer for cport in messages
89 * @cport_out: endpoint for for cport out messages
90 * @cport_out_urb: array of urbs for the CPort out messages
91 * @cport_out_urb_busy: array of flags to see if the @cport_out_urb is busy or
93 * @cport_out_urb_cancelled: array of flags indicating whether the
94 * corresponding @cport_out_urb is being cancelled
95 * @cport_out_urb_lock: locks the @cport_out_urb_busy "list"
97 * @apb_log_task: task pointer for logging thread
98 * @apb_log_dentry: file system entry for the log file interface
99 * @apb_log_enable_dentry: file system entry for enabling logging
100 * @apb_log_fifo: kernel FIFO to carry logged data
103 struct usb_device *usb_dev;
104 struct usb_interface *usb_intf;
105 struct gb_host_device *hd;
107 struct es2_cport_in cport_in[NUM_BULKS];
108 struct es2_cport_out cport_out[NUM_BULKS];
109 struct urb *cport_out_urb[NUM_CPORT_OUT_URB];
110 bool cport_out_urb_busy[NUM_CPORT_OUT_URB];
111 bool cport_out_urb_cancelled[NUM_CPORT_OUT_URB];
112 spinlock_t cport_out_urb_lock;
116 struct task_struct *apb_log_task;
117 struct dentry *apb_log_dentry;
118 struct dentry *apb_log_enable_dentry;
119 DECLARE_KFIFO(apb_log_fifo, char, APB1_LOG_SIZE);
123 * cport_to_ep - information about cport to endpoints mapping
124 * @cport_id: the id of cport to map to endpoints
125 * @endpoint_in: the endpoint number to use for in transfer
126 * @endpoint_out: he endpoint number to use for out transfer
134 static inline struct es2_ap_dev *hd_to_es2(struct gb_host_device *hd)
136 return (struct es2_ap_dev *)&hd->hd_priv;
139 static void cport_out_callback(struct urb *urb);
140 static void usb_log_enable(struct es2_ap_dev *es2);
141 static void usb_log_disable(struct es2_ap_dev *es2);
143 /* Get the endpoints pair mapped to the cport */
144 static int cport_to_ep_pair(struct es2_ap_dev *es2, u16 cport_id)
146 if (cport_id >= es2->hd->num_cports)
148 return es2->cport_to_ep[cport_id];
151 #define ES2_TIMEOUT 500 /* 500 ms for the SVC to do something */
153 /* Disable for now until we work all of this out to keep a warning-free build */
155 /* Test if the endpoints pair is already mapped to a cport */
156 static int ep_pair_in_use(struct es2_ap_dev *es2, int ep_pair)
160 for (i = 0; i < es2->hd->num_cports; i++) {
161 if (es2->cport_to_ep[i] == ep_pair)
167 /* Configure the endpoint mapping and send the request to APBridge */
168 static int map_cport_to_ep(struct es2_ap_dev *es2,
169 u16 cport_id, int ep_pair)
172 struct cport_to_ep *cport_to_ep;
174 if (ep_pair < 0 || ep_pair >= NUM_BULKS)
176 if (cport_id >= es2->hd->num_cports)
178 if (ep_pair && ep_pair_in_use(es2, ep_pair))
181 cport_to_ep = kmalloc(sizeof(*cport_to_ep), GFP_KERNEL);
185 es2->cport_to_ep[cport_id] = ep_pair;
186 cport_to_ep->cport_id = cpu_to_le16(cport_id);
187 cport_to_ep->endpoint_in = es2->cport_in[ep_pair].endpoint;
188 cport_to_ep->endpoint_out = es2->cport_out[ep_pair].endpoint;
190 retval = usb_control_msg(es2->usb_dev,
191 usb_sndctrlpipe(es2->usb_dev, 0),
193 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
196 sizeof(*cport_to_ep),
198 if (retval == sizeof(*cport_to_ep))
205 /* Unmap a cport: use the muxed endpoints pair */
206 static int unmap_cport(struct es2_ap_dev *es2, u16 cport_id)
208 return map_cport_to_ep(es2, cport_id, 0);
212 static int es2_cport_in_enable(struct es2_ap_dev *es2,
213 struct es2_cport_in *cport_in)
219 for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
220 urb = cport_in->urb[i];
222 ret = usb_submit_urb(urb, GFP_KERNEL);
224 dev_err(&es2->usb_dev->dev,
225 "failed to submit in-urb: %d\n", ret);
233 for (--i; i >= 0; --i) {
234 urb = cport_in->urb[i];
241 static void es2_cport_in_disable(struct es2_ap_dev *es2,
242 struct es2_cport_in *cport_in)
247 for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
248 urb = cport_in->urb[i];
253 static struct urb *next_free_urb(struct es2_ap_dev *es2, gfp_t gfp_mask)
255 struct urb *urb = NULL;
259 spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
261 /* Look in our pool of allocated urbs first, as that's the "fastest" */
262 for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
263 if (es2->cport_out_urb_busy[i] == false &&
264 es2->cport_out_urb_cancelled[i] == false) {
265 es2->cport_out_urb_busy[i] = true;
266 urb = es2->cport_out_urb[i];
270 spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
275 * Crap, pool is empty, complain to the syslog and go allocate one
276 * dynamically as we have to succeed.
278 dev_err(&es2->usb_dev->dev,
279 "No free CPort OUT urbs, having to dynamically allocate one!\n");
280 return usb_alloc_urb(0, gfp_mask);
283 static void free_urb(struct es2_ap_dev *es2, struct urb *urb)
288 * See if this was an urb in our pool, if so mark it "free", otherwise
289 * we need to free it ourselves.
291 spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
292 for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
293 if (urb == es2->cport_out_urb[i]) {
294 es2->cport_out_urb_busy[i] = false;
299 spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
301 /* If urb is not NULL, then we need to free this urb */
306 * We (ab)use the operation-message header pad bytes to transfer the
307 * cport id in order to minimise overhead.
310 gb_message_cport_pack(struct gb_operation_msg_hdr *header, u16 cport_id)
312 header->pad[0] = cport_id;
315 /* Clear the pad bytes used for the CPort id */
316 static void gb_message_cport_clear(struct gb_operation_msg_hdr *header)
321 /* Extract the CPort id packed into the header, and clear it */
322 static u16 gb_message_cport_unpack(struct gb_operation_msg_hdr *header)
324 u16 cport_id = header->pad[0];
326 gb_message_cport_clear(header);
332 * Returns zero if the message was successfully queued, or a negative errno
335 static int message_send(struct gb_host_device *hd, u16 cport_id,
336 struct gb_message *message, gfp_t gfp_mask)
338 struct es2_ap_dev *es2 = hd_to_es2(hd);
339 struct usb_device *udev = es2->usb_dev;
347 * The data actually transferred will include an indication
348 * of where the data should be sent. Do one last check of
349 * the target CPort id before filling it in.
351 if (!cport_id_valid(hd, cport_id)) {
352 dev_err(&udev->dev, "invalid destination cport 0x%02x\n",
357 /* Find a free urb */
358 urb = next_free_urb(es2, gfp_mask);
362 spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
363 message->hcpriv = urb;
364 spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
366 /* Pack the cport id into the message header */
367 gb_message_cport_pack(message->header, cport_id);
369 buffer_size = sizeof(*message->header) + message->payload_size;
371 ep_pair = cport_to_ep_pair(es2, cport_id);
372 usb_fill_bulk_urb(urb, udev,
373 usb_sndbulkpipe(udev,
374 es2->cport_out[ep_pair].endpoint),
375 message->buffer, buffer_size,
376 cport_out_callback, message);
377 urb->transfer_flags |= URB_ZERO_PACKET;
378 trace_gb_host_device_send(hd, cport_id, buffer_size);
379 retval = usb_submit_urb(urb, gfp_mask);
381 dev_err(&udev->dev, "failed to submit out-urb: %d\n", retval);
383 spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
384 message->hcpriv = NULL;
385 spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
388 gb_message_cport_clear(message->header);
397 * Can not be called in atomic context.
399 static void message_cancel(struct gb_message *message)
401 struct gb_host_device *hd = message->operation->connection->hd;
402 struct es2_ap_dev *es2 = hd_to_es2(hd);
408 spin_lock_irq(&es2->cport_out_urb_lock);
409 urb = message->hcpriv;
411 /* Prevent dynamically allocated urb from being deallocated. */
414 /* Prevent pre-allocated urb from being reused. */
415 for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
416 if (urb == es2->cport_out_urb[i]) {
417 es2->cport_out_urb_cancelled[i] = true;
421 spin_unlock_irq(&es2->cport_out_urb_lock);
425 if (i < NUM_CPORT_OUT_URB) {
426 spin_lock_irq(&es2->cport_out_urb_lock);
427 es2->cport_out_urb_cancelled[i] = false;
428 spin_unlock_irq(&es2->cport_out_urb_lock);
434 static int cport_reset(struct gb_host_device *hd, u16 cport_id)
436 struct es2_ap_dev *es2 = hd_to_es2(hd);
437 struct usb_device *udev = es2->usb_dev;
440 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
442 USB_DIR_OUT | USB_TYPE_VENDOR |
443 USB_RECIP_INTERFACE, cport_id, 0,
444 NULL, 0, ES2_TIMEOUT);
446 dev_err(&udev->dev, "failed to reset cport %hu: %d\n", cport_id,
454 static int cport_enable(struct gb_host_device *hd, u16 cport_id)
458 if (cport_id != GB_SVC_CPORT_ID) {
459 retval = cport_reset(hd, cport_id);
467 static int latency_tag_enable(struct gb_host_device *hd, u16 cport_id)
470 struct es2_ap_dev *es2 = hd_to_es2(hd);
471 struct usb_device *udev = es2->usb_dev;
473 if (!cport_id_valid(hd, cport_id)) {
474 dev_err(&udev->dev, "invalid destination cport 0x%02x\n",
479 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
480 REQUEST_LATENCY_TAG_EN,
481 USB_DIR_OUT | USB_TYPE_VENDOR |
482 USB_RECIP_INTERFACE, cport_id, 0, NULL,
486 dev_err(&udev->dev, "Cannot enable latency tag for cport %d\n",
491 static int latency_tag_disable(struct gb_host_device *hd, u16 cport_id)
494 struct es2_ap_dev *es2 = hd_to_es2(hd);
495 struct usb_device *udev = es2->usb_dev;
497 if (!cport_id_valid(hd, cport_id)) {
498 dev_err(&udev->dev, "invalid destination cport 0x%02x\n",
503 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
504 REQUEST_LATENCY_TAG_DIS,
505 USB_DIR_OUT | USB_TYPE_VENDOR |
506 USB_RECIP_INTERFACE, cport_id, 0, NULL,
510 dev_err(&udev->dev, "Cannot disable latency tag for cport %d\n",
515 static struct gb_hd_driver es2_driver = {
516 .hd_priv_size = sizeof(struct es2_ap_dev),
517 .message_send = message_send,
518 .message_cancel = message_cancel,
519 .cport_enable = cport_enable,
520 .latency_tag_enable = latency_tag_enable,
521 .latency_tag_disable = latency_tag_disable,
524 /* Common function to report consistent warnings based on URB status */
525 static int check_urb_status(struct urb *urb)
527 struct device *dev = &urb->dev->dev;
528 int status = urb->status;
535 dev_err(dev, "%s: overflow actual length is %d\n",
536 __func__, urb->actual_length);
542 /* device is gone, stop sending */
545 dev_err(dev, "%s: unknown status %d\n", __func__, status);
550 static void es2_destroy(struct es2_ap_dev *es2)
552 struct usb_device *udev;
556 debugfs_remove(es2->apb_log_enable_dentry);
557 usb_log_disable(es2);
559 /* Tear down everything! */
560 for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
561 struct urb *urb = es2->cport_out_urb[i];
567 es2->cport_out_urb[i] = NULL;
568 es2->cport_out_urb_busy[i] = false; /* just to be anal */
571 for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) {
572 struct es2_cport_in *cport_in = &es2->cport_in[bulk_in];
574 for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
575 struct urb *urb = cport_in->urb[i];
580 kfree(cport_in->buffer[i]);
581 cport_in->buffer[i] = NULL;
585 kfree(es2->cport_to_ep);
593 static void ap_disconnect(struct usb_interface *interface)
595 struct es2_ap_dev *es2 = usb_get_intfdata(interface);
598 for (i = 0; i < NUM_BULKS; ++i)
599 es2_cport_in_disable(es2, &es2->cport_in[i]);
606 static void cport_in_callback(struct urb *urb)
608 struct gb_host_device *hd = urb->context;
609 struct device *dev = &urb->dev->dev;
610 struct gb_operation_msg_hdr *header;
611 int status = check_urb_status(urb);
616 if ((status == -EAGAIN) || (status == -EPROTO))
618 dev_err(dev, "urb cport in error %d (dropped)\n", status);
622 if (urb->actual_length < sizeof(*header)) {
623 dev_err(dev, "short message received\n");
627 /* Extract the CPort id, which is packed in the message header */
628 header = urb->transfer_buffer;
629 cport_id = gb_message_cport_unpack(header);
631 if (cport_id_valid(hd, cport_id)) {
632 trace_gb_host_device_recv(hd, cport_id, urb->actual_length);
633 greybus_data_rcvd(hd, cport_id, urb->transfer_buffer,
636 dev_err(dev, "invalid cport id 0x%02x received\n", cport_id);
639 /* put our urb back in the request pool */
640 retval = usb_submit_urb(urb, GFP_ATOMIC);
642 dev_err(dev, "failed to resubmit in-urb: %d\n", retval);
645 static void cport_out_callback(struct urb *urb)
647 struct gb_message *message = urb->context;
648 struct gb_host_device *hd = message->operation->connection->hd;
649 struct es2_ap_dev *es2 = hd_to_es2(hd);
650 int status = check_urb_status(urb);
653 gb_message_cport_clear(message->header);
655 spin_lock_irqsave(&es2->cport_out_urb_lock, flags);
656 message->hcpriv = NULL;
657 spin_unlock_irqrestore(&es2->cport_out_urb_lock, flags);
660 * Tell the submitter that the message send (attempt) is
661 * complete, and report the status.
663 greybus_message_sent(hd, message, status);
668 #define APB1_LOG_MSG_SIZE 64
669 static void apb_log_get(struct es2_ap_dev *es2, char *buf)
673 /* SVC messages go down our control pipe */
675 retval = usb_control_msg(es2->usb_dev,
676 usb_rcvctrlpipe(es2->usb_dev, 0),
678 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
684 kfifo_in(&es2->apb_log_fifo, buf, retval);
685 } while (retval > 0);
688 static int apb_log_poll(void *data)
690 struct es2_ap_dev *es2 = data;
693 buf = kmalloc(APB1_LOG_MSG_SIZE, GFP_KERNEL);
697 while (!kthread_should_stop()) {
699 apb_log_get(es2, buf);
707 static ssize_t apb_log_read(struct file *f, char __user *buf,
708 size_t count, loff_t *ppos)
710 struct es2_ap_dev *es2 = f->f_inode->i_private;
715 if (count > APB1_LOG_SIZE)
716 count = APB1_LOG_SIZE;
718 tmp_buf = kmalloc(count, GFP_KERNEL);
722 copied = kfifo_out(&es2->apb_log_fifo, tmp_buf, count);
723 ret = simple_read_from_buffer(buf, count, ppos, tmp_buf, copied);
730 static const struct file_operations apb_log_fops = {
731 .read = apb_log_read,
734 static void usb_log_enable(struct es2_ap_dev *es2)
736 if (!IS_ERR_OR_NULL(es2->apb_log_task))
739 /* get log from APB1 */
740 es2->apb_log_task = kthread_run(apb_log_poll, es2, "apb_log");
741 if (IS_ERR(es2->apb_log_task))
743 /* XXX We will need to rename this per APB */
744 es2->apb_log_dentry = debugfs_create_file("apb_log", S_IRUGO,
745 gb_debugfs_get(), NULL,
749 static void usb_log_disable(struct es2_ap_dev *es2)
751 if (IS_ERR_OR_NULL(es2->apb_log_task))
754 debugfs_remove(es2->apb_log_dentry);
755 es2->apb_log_dentry = NULL;
757 kthread_stop(es2->apb_log_task);
758 es2->apb_log_task = NULL;
761 static ssize_t apb_log_enable_read(struct file *f, char __user *buf,
762 size_t count, loff_t *ppos)
764 struct es2_ap_dev *es2 = f->f_inode->i_private;
765 int enable = !IS_ERR_OR_NULL(es2->apb_log_task);
768 sprintf(tmp_buf, "%d\n", enable);
769 return simple_read_from_buffer(buf, count, ppos, tmp_buf, 3);
772 static ssize_t apb_log_enable_write(struct file *f, const char __user *buf,
773 size_t count, loff_t *ppos)
777 struct es2_ap_dev *es2 = f->f_inode->i_private;
779 retval = kstrtoint_from_user(buf, count, 10, &enable);
786 usb_log_disable(es2);
791 static const struct file_operations apb_log_enable_fops = {
792 .read = apb_log_enable_read,
793 .write = apb_log_enable_write,
796 static int apb_get_cport_count(struct usb_device *udev)
801 cport_count = kmalloc(sizeof(*cport_count), GFP_KERNEL);
805 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
807 USB_DIR_IN | USB_TYPE_VENDOR |
808 USB_RECIP_INTERFACE, 0, 0, cport_count,
809 sizeof(*cport_count), ES2_TIMEOUT);
811 dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
816 retval = le16_to_cpu(*cport_count);
818 /* We need to fit a CPort ID in one byte of a message header */
819 if (retval > U8_MAX) {
821 dev_warn(&udev->dev, "Limiting number of CPorts to U8_MAX\n");
830 * The ES2 USB Bridge device has 15 endpoints
831 * 1 Control - usual USB stuff + AP -> APBridgeA messages
832 * 7 Bulk IN - CPort data in
833 * 7 Bulk OUT - CPort data out
835 static int ap_probe(struct usb_interface *interface,
836 const struct usb_device_id *id)
838 struct es2_ap_dev *es2;
839 struct gb_host_device *hd;
840 struct usb_device *udev;
841 struct usb_host_interface *iface_desc;
842 struct usb_endpoint_descriptor *endpoint;
845 int retval = -ENOMEM;
849 udev = usb_get_dev(interface_to_usbdev(interface));
851 num_cports = apb_get_cport_count(udev);
852 if (num_cports < 0) {
854 dev_err(&udev->dev, "Cannot retrieve CPort count: %d\n",
859 hd = gb_hd_create(&es2_driver, &udev->dev, ES2_GBUF_MSG_SIZE_MAX,
868 es2->usb_intf = interface;
870 spin_lock_init(&es2->cport_out_urb_lock);
871 INIT_KFIFO(es2->apb_log_fifo);
872 usb_set_intfdata(interface, es2);
874 es2->cport_to_ep = kcalloc(hd->num_cports, sizeof(*es2->cport_to_ep),
876 if (!es2->cport_to_ep) {
881 /* find all bulk endpoints */
882 iface_desc = interface->cur_altsetting;
883 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
884 endpoint = &iface_desc->endpoint[i].desc;
886 if (usb_endpoint_is_bulk_in(endpoint)) {
887 es2->cport_in[bulk_in++].endpoint =
888 endpoint->bEndpointAddress;
889 } else if (usb_endpoint_is_bulk_out(endpoint)) {
890 es2->cport_out[bulk_out++].endpoint =
891 endpoint->bEndpointAddress;
894 "Unknown endpoint type found, address %x\n",
895 endpoint->bEndpointAddress);
898 if (bulk_in != NUM_BULKS || bulk_out != NUM_BULKS) {
899 dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n");
903 /* Allocate buffers for our cport in messages */
904 for (bulk_in = 0; bulk_in < NUM_BULKS; bulk_in++) {
905 struct es2_cport_in *cport_in = &es2->cport_in[bulk_in];
907 for (i = 0; i < NUM_CPORT_IN_URB; ++i) {
911 urb = usb_alloc_urb(0, GFP_KERNEL);
914 buffer = kmalloc(ES2_GBUF_MSG_SIZE_MAX, GFP_KERNEL);
918 usb_fill_bulk_urb(urb, udev,
919 usb_rcvbulkpipe(udev,
921 buffer, ES2_GBUF_MSG_SIZE_MAX,
922 cport_in_callback, hd);
923 cport_in->urb[i] = urb;
924 cport_in->buffer[i] = buffer;
928 /* Allocate urbs for our CPort OUT messages */
929 for (i = 0; i < NUM_CPORT_OUT_URB; ++i) {
932 urb = usb_alloc_urb(0, GFP_KERNEL);
936 es2->cport_out_urb[i] = urb;
937 es2->cport_out_urb_busy[i] = false; /* just to be anal */
940 /* XXX We will need to rename this per APB */
941 es2->apb_log_enable_dentry = debugfs_create_file("apb_log_enable",
943 gb_debugfs_get(), es2,
944 &apb_log_enable_fops);
946 retval = gb_hd_add(hd);
950 for (i = 0; i < NUM_BULKS; ++i) {
951 retval = es2_cport_in_enable(es2, &es2->cport_in[i]);
953 goto err_disable_cport_in;
958 err_disable_cport_in:
959 for (--i; i >= 0; --i)
960 es2_cport_in_disable(es2, &es2->cport_in[i]);
968 static struct usb_driver es2_ap_driver = {
969 .name = "es2_ap_driver",
971 .disconnect = ap_disconnect,
972 .id_table = id_table,
975 module_usb_driver(es2_ap_driver);
977 MODULE_LICENSE("GPL v2");
978 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");