1 /* -----------------------------------------------------------------------------
2 * Copyright (c) 2011 Ozmo Inc
3 * Released under the GNU General Public License Version 2 (GPLv2).
5 * This file provides the implementation of a USB host controller device that
6 * does not have any associated hardware. Instead the virtual device is
7 * connected to the WiFi network and emulates the operation of a USB hcd by
8 * receiving and sending network frames.
10 * We take great pains to reduce the amount of code where interrupts need to be
11 * disabled and in this respect we are different from standard HCD's. In
12 * particular we don't want in_irq() code bleeding over to the protocol side of
14 * The troublesome functions are the urb enqueue and dequeue functions both of
15 * which can be called in_irq(). So for these functions we put the urbs into a
16 * queue and request a tasklet to process them. This means that a spinlock with
17 * interrupts disabled must be held for insertion and removal but most code is
18 * is in tasklet or soft irq context. The lock that protects this list is called
19 * the tasklet lock and serves the purpose of the 'HCD lock' which must be held
20 * when calling the following functions.
21 * usb_hcd_link_urb_to_ep()
22 * usb_hcd_unlink_urb_from_ep()
23 * usb_hcd_flush_endpoint()
24 * usb_hcd_check_unlink_urb()
25 * -----------------------------------------------------------------------------
27 #include <linux/platform_device.h>
28 #include <linux/usb.h>
29 #include <linux/jiffies.h>
30 #include <linux/slab.h>
31 #include <linux/export.h>
32 #include "linux/usb/hcd.h"
33 #include <asm/unaligned.h>
37 #include "ozurbparanoia.h"
39 /*------------------------------------------------------------------------------
40 * Number of units of buffering to capture for an isochronous IN endpoint before
41 * allowing data to be indicated up.
43 #define OZ_IN_BUFFERING_UNITS 50
44 /* Name of our platform device.
46 #define OZ_PLAT_DEV_NAME "ozwpan"
47 /* Maximum number of free urb links that can be kept in the pool.
49 #define OZ_MAX_LINK_POOL_SIZE 16
50 /* Get endpoint object from the containing link.
52 #define ep_from_link(__e) container_of((__e), struct oz_endpoint, link)
53 /*------------------------------------------------------------------------------
54 * Used to link urbs together and also store some status information for each
56 * A cache of these are kept in a pool to reduce number of calls to kmalloc.
59 struct list_head link;
64 unsigned long submit_jiffies;
67 /* Holds state information about a USB endpoint.
70 struct list_head urb_list; /* List of oz_urb_link items. */
71 struct list_head link; /* For isoc ep, links in to isoc
73 unsigned long last_jiffies;
86 /* Bits in the flags field. */
87 #define OZ_F_EP_BUFFERING 0x1
88 #define OZ_F_EP_HAVE_STREAM 0x2
90 /* Holds state information about a USB interface.
97 /* Holds state information about an hcd port.
99 #define OZ_NB_ENDPOINTS 16
104 struct oz_hcd *ozhcd;
105 spinlock_t port_lock;
110 struct oz_interface *iface;
111 struct oz_endpoint *out_ep[OZ_NB_ENDPOINTS];
112 struct oz_endpoint *in_ep[OZ_NB_ENDPOINTS];
113 struct list_head isoc_out_ep;
114 struct list_head isoc_in_ep;
116 #define OZ_PORT_F_PRESENT 0x1
117 #define OZ_PORT_F_CHANGED 0x2
118 #define OZ_PORT_F_DYING 0x4
120 /* Data structure in the private context area of struct usb_hcd.
122 #define OZ_NB_PORTS 8
125 struct list_head urb_pending_list;
126 struct list_head urb_cancel_list;
127 struct list_head orphanage;
128 int conn_port; /* Port that is currently connecting, -1 if none.*/
129 struct oz_port ports[OZ_NB_PORTS];
133 /* Bits in flags field.
135 #define OZ_HDC_F_SUSPENDED 0x1
137 /*------------------------------------------------------------------------------
138 * Static function prototypes.
140 static int oz_hcd_start(struct usb_hcd *hcd);
141 static void oz_hcd_stop(struct usb_hcd *hcd);
142 static void oz_hcd_shutdown(struct usb_hcd *hcd);
143 static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
145 static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
146 static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
147 struct usb_host_endpoint *ep);
148 static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
149 struct usb_host_endpoint *ep);
150 static int oz_hcd_get_frame_number(struct usb_hcd *hcd);
151 static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf);
152 static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
153 u16 windex, char *buf, u16 wlength);
154 static int oz_hcd_bus_suspend(struct usb_hcd *hcd);
155 static int oz_hcd_bus_resume(struct usb_hcd *hcd);
156 static int oz_plat_probe(struct platform_device *dev);
157 static int oz_plat_remove(struct platform_device *dev);
158 static void oz_plat_shutdown(struct platform_device *dev);
159 static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg);
160 static int oz_plat_resume(struct platform_device *dev);
161 static void oz_urb_process_tasklet(unsigned long unused);
162 static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
163 struct oz_port *port, struct usb_host_config *config,
165 static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
166 struct oz_port *port);
167 static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
168 struct oz_port *port,
169 struct usb_host_interface *intf, gfp_t mem_flags);
170 static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
171 struct oz_port *port, int if_ix);
172 static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
174 static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
176 static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status);
177 /*------------------------------------------------------------------------------
178 * Static external variables.
180 static struct platform_device *g_plat_dev;
181 static struct oz_hcd *g_ozhcd;
182 static DEFINE_SPINLOCK(g_hcdlock); /* Guards g_ozhcd. */
183 static const char g_hcd_name[] = "Ozmo WPAN";
184 static struct list_head *g_link_pool;
185 static int g_link_pool_size;
186 static DEFINE_SPINLOCK(g_link_lock);
187 static DEFINE_SPINLOCK(g_tasklet_lock);
188 static struct tasklet_struct g_urb_process_tasklet;
189 static struct tasklet_struct g_urb_cancel_tasklet;
190 static atomic_t g_pending_urbs = ATOMIC_INIT(0);
191 static const struct hc_driver g_oz_hc_drv = {
192 .description = g_hcd_name,
193 .product_desc = "Ozmo Devices WPAN",
194 .hcd_priv_size = sizeof(struct oz_hcd),
196 .start = oz_hcd_start,
198 .shutdown = oz_hcd_shutdown,
199 .urb_enqueue = oz_hcd_urb_enqueue,
200 .urb_dequeue = oz_hcd_urb_dequeue,
201 .endpoint_disable = oz_hcd_endpoint_disable,
202 .endpoint_reset = oz_hcd_endpoint_reset,
203 .get_frame_number = oz_hcd_get_frame_number,
204 .hub_status_data = oz_hcd_hub_status_data,
205 .hub_control = oz_hcd_hub_control,
206 .bus_suspend = oz_hcd_bus_suspend,
207 .bus_resume = oz_hcd_bus_resume,
210 static struct platform_driver g_oz_plat_drv = {
211 .probe = oz_plat_probe,
212 .remove = oz_plat_remove,
213 .shutdown = oz_plat_shutdown,
214 .suspend = oz_plat_suspend,
215 .resume = oz_plat_resume,
217 .name = OZ_PLAT_DEV_NAME,
218 .owner = THIS_MODULE,
221 /*------------------------------------------------------------------------------
222 * Gets our private context area (which is of type struct oz_hcd) from the
226 static inline struct oz_hcd *oz_hcd_private(struct usb_hcd *hcd)
228 return (struct oz_hcd *)hcd->hcd_priv;
230 /*------------------------------------------------------------------------------
231 * Searches list of ports to find the index of the one with a specified USB
232 * bus address. If none of the ports has the bus address then the connection
233 * port is returned, if there is one or -1 otherwise.
236 static int oz_get_port_from_addr(struct oz_hcd *ozhcd, u8 bus_addr)
239 for (i = 0; i < OZ_NB_PORTS; i++) {
240 if (ozhcd->ports[i].bus_addr == bus_addr)
243 return ozhcd->conn_port;
245 /*------------------------------------------------------------------------------
246 * Allocates an urb link, first trying the pool but going to heap if empty.
249 static struct oz_urb_link *oz_alloc_urb_link(void)
251 struct oz_urb_link *urbl = 0;
252 unsigned long irq_state;
253 spin_lock_irqsave(&g_link_lock, irq_state);
255 urbl = container_of(g_link_pool, struct oz_urb_link, link);
256 g_link_pool = urbl->link.next;
259 spin_unlock_irqrestore(&g_link_lock, irq_state);
261 urbl = kmalloc(sizeof(struct oz_urb_link), GFP_ATOMIC);
264 /*------------------------------------------------------------------------------
265 * Frees an urb link by putting it in the pool if there is enough space or
266 * deallocating it to heap otherwise.
269 static void oz_free_urb_link(struct oz_urb_link *urbl)
272 unsigned long irq_state;
273 spin_lock_irqsave(&g_link_lock, irq_state);
274 if (g_link_pool_size < OZ_MAX_LINK_POOL_SIZE) {
275 urbl->link.next = g_link_pool;
276 g_link_pool = &urbl->link;
280 spin_unlock_irqrestore(&g_link_lock, irq_state);
285 /*------------------------------------------------------------------------------
286 * Deallocates all the urb links in the pool.
289 static void oz_empty_link_pool(void)
292 unsigned long irq_state;
293 spin_lock_irqsave(&g_link_lock, irq_state);
296 g_link_pool_size = 0;
297 spin_unlock_irqrestore(&g_link_lock, irq_state);
299 struct oz_urb_link *urbl =
300 container_of(e, struct oz_urb_link, link);
305 /*------------------------------------------------------------------------------
306 * Allocates endpoint structure and optionally a buffer. If a buffer is
307 * allocated it immediately follows the endpoint structure.
310 static struct oz_endpoint *oz_ep_alloc(gfp_t mem_flags, int buffer_size)
312 struct oz_endpoint *ep =
313 kzalloc(sizeof(struct oz_endpoint)+buffer_size, mem_flags);
315 INIT_LIST_HEAD(&ep->urb_list);
316 INIT_LIST_HEAD(&ep->link);
319 ep->buffer_size = buffer_size;
320 ep->buffer = (u8 *)(ep+1);
325 /*------------------------------------------------------------------------------
326 * Pre-condition: Must be called with g_tasklet_lock held and interrupts
328 * Context: softirq or process
330 struct oz_urb_link *oz_uncancel_urb(struct oz_hcd *ozhcd, struct urb *urb)
332 struct oz_urb_link *urbl;
334 list_for_each(e, &ozhcd->urb_cancel_list) {
335 urbl = container_of(e, struct oz_urb_link, link);
336 if (urb == urbl->urb) {
343 /*------------------------------------------------------------------------------
344 * This is called when we have finished processing an urb. It unlinks it from
345 * the ep and returns it to the core.
346 * Context: softirq or process
348 static void oz_complete_urb(struct usb_hcd *hcd, struct urb *urb,
349 int status, unsigned long submit_jiffies)
351 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
352 unsigned long irq_state;
353 struct oz_urb_link *cancel_urbl = 0;
354 spin_lock_irqsave(&g_tasklet_lock, irq_state);
355 usb_hcd_unlink_urb_from_ep(hcd, urb);
356 /* Clear hcpriv which will prevent it being put in the cancel list
357 * in the event that an attempt is made to cancel it.
360 /* Walk the cancel list in case the urb is already sitting there.
361 * Since we process the cancel list in a tasklet rather than in
362 * the dequeue function this could happen.
364 cancel_urbl = oz_uncancel_urb(ozhcd, urb);
365 /* Note: we release lock but do not enable local irqs.
366 * It appears that usb_hcd_giveback_urb() expects irqs to be disabled,
367 * or at least other host controllers disable interrupts at this point
368 * so we do the same. We must, however, release the lock otherwise a
369 * deadlock will occur if an urb is submitted to our driver in the urb
370 * completion function. Because we disable interrupts it is possible
371 * that the urb_enqueue function can be called with them disabled.
373 spin_unlock(&g_tasklet_lock);
374 if (oz_forget_urb(urb)) {
375 oz_trace("OZWPAN: ERROR Unknown URB %p\n", urb);
377 static unsigned long last_time;
378 atomic_dec(&g_pending_urbs);
379 oz_trace2(OZ_TRACE_URB,
380 "%lu: giveback_urb(%p,%x) %lu %lu pending:%d\n",
381 jiffies, urb, status, jiffies-submit_jiffies,
382 jiffies-last_time, atomic_read(&g_pending_urbs));
384 oz_event_log(OZ_EVT_URB_DONE, 0, 0, urb, status);
385 usb_hcd_giveback_urb(hcd, urb, status);
387 spin_lock(&g_tasklet_lock);
388 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
390 oz_free_urb_link(cancel_urbl);
392 /*------------------------------------------------------------------------------
393 * Deallocates an endpoint including deallocating any associated stream and
394 * returning any queued urbs to the core.
397 static void oz_ep_free(struct oz_port *port, struct oz_endpoint *ep)
399 oz_trace("oz_ep_free()\n");
401 struct list_head list;
402 struct oz_hcd *ozhcd = port->ozhcd;
403 INIT_LIST_HEAD(&list);
404 if (ep->flags & OZ_F_EP_HAVE_STREAM)
405 oz_usb_stream_delete(port->hpd, ep->ep_num);
406 /* Transfer URBs to the orphanage while we hold the lock. */
407 spin_lock_bh(&ozhcd->hcd_lock);
408 /* Note: this works even if ep->urb_list is empty.*/
409 list_replace_init(&ep->urb_list, &list);
410 /* Put the URBs in the orphanage. */
411 list_splice_tail(&list, &ozhcd->orphanage);
412 spin_unlock_bh(&ozhcd->hcd_lock);
414 oz_trace("Freeing endpoint memory\n");
417 /*------------------------------------------------------------------------------
420 static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
421 struct urb *urb, u8 req_id)
423 struct oz_urb_link *urbl;
424 struct oz_endpoint *ep;
426 if (ep_addr >= OZ_NB_ENDPOINTS) {
427 oz_trace("Invalid endpoint number in oz_enqueue_ep_urb().\n");
430 urbl = oz_alloc_urb_link();
433 urbl->submit_jiffies = jiffies;
435 urbl->req_id = req_id;
436 urbl->ep_num = ep_addr;
437 /* Hold lock while we insert the URB into the list within the
438 * endpoint structure.
440 spin_lock_bh(&port->ozhcd->hcd_lock);
441 /* If the urb has been unlinked while out of any list then
445 spin_unlock_bh(&port->ozhcd->hcd_lock);
446 oz_trace("urb %p unlinked so complete immediately\n", urb);
447 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
448 oz_free_urb_link(urbl);
452 ep = port->in_ep[ep_addr];
454 ep = port->out_ep[ep_addr];
455 if (ep && port->hpd) {
456 list_add_tail(&urbl->link, &ep->urb_list);
457 if (!in_dir && ep_addr && (ep->credit < 0)) {
458 ep->last_jiffies = jiffies;
460 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num,
466 spin_unlock_bh(&port->ozhcd->hcd_lock);
468 oz_free_urb_link(urbl);
471 /*------------------------------------------------------------------------------
472 * Removes an urb from the queue in the endpoint.
473 * Returns 0 if it is found and -EIDRM otherwise.
476 static int oz_dequeue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
479 struct oz_urb_link *urbl = 0;
480 struct oz_endpoint *ep;
481 spin_lock_bh(&port->ozhcd->hcd_lock);
483 ep = port->in_ep[ep_addr];
485 ep = port->out_ep[ep_addr];
488 list_for_each(e, &ep->urb_list) {
489 urbl = container_of(e, struct oz_urb_link, link);
490 if (urbl->urb == urb) {
497 spin_unlock_bh(&port->ozhcd->hcd_lock);
499 oz_free_urb_link(urbl);
500 return urbl ? 0 : -EIDRM;
502 /*------------------------------------------------------------------------------
503 * Finds an urb given its request id.
506 static struct urb *oz_find_urb_by_id(struct oz_port *port, int ep_ix,
509 struct oz_hcd *ozhcd = port->ozhcd;
511 struct oz_urb_link *urbl = 0;
512 struct oz_endpoint *ep;
514 spin_lock_bh(&ozhcd->hcd_lock);
515 ep = port->out_ep[ep_ix];
518 list_for_each(e, &ep->urb_list) {
519 urbl = container_of(e, struct oz_urb_link, link);
520 if (urbl->req_id == req_id) {
527 spin_unlock_bh(&ozhcd->hcd_lock);
528 /* If urb is non-zero then we we must have an urb link to delete.
531 oz_free_urb_link(urbl);
534 /*------------------------------------------------------------------------------
535 * Pre-condition: Port lock must be held.
538 static void oz_acquire_port(struct oz_port *port, void *hpd)
540 INIT_LIST_HEAD(&port->isoc_out_ep);
541 INIT_LIST_HEAD(&port->isoc_in_ep);
542 port->flags |= OZ_PORT_F_PRESENT | OZ_PORT_F_CHANGED;
543 port->status |= USB_PORT_STAT_CONNECTION |
544 (USB_PORT_STAT_C_CONNECTION << 16);
548 /*------------------------------------------------------------------------------
551 static struct oz_hcd *oz_hcd_claim(void)
553 struct oz_hcd *ozhcd;
554 spin_lock_bh(&g_hcdlock);
557 usb_get_hcd(ozhcd->hcd);
558 spin_unlock_bh(&g_hcdlock);
561 /*------------------------------------------------------------------------------
564 static inline void oz_hcd_put(struct oz_hcd *ozhcd)
567 usb_put_hcd(ozhcd->hcd);
569 /*------------------------------------------------------------------------------
570 * This is called by the protocol handler to notify that a PD has arrived.
571 * We allocate a port to associate with the PD and create a structure for
572 * endpoint 0. This port is made the connection port.
573 * In the event that one of the other port is already a connection port then
575 * TODO We should be able to do better than fail and should be able remember
576 * that this port needs configuring and make it the connection port once the
577 * current connection port has been assigned an address. Collisions here are
578 * probably very rare indeed.
581 void *oz_hcd_pd_arrived(void *hpd)
585 struct oz_hcd *ozhcd = 0;
586 struct oz_endpoint *ep;
587 oz_trace("oz_hcd_pd_arrived()\n");
588 ozhcd = oz_hcd_claim();
591 /* Allocate an endpoint object in advance (before holding hcd lock) to
592 * use for out endpoint 0.
594 ep = oz_ep_alloc(GFP_ATOMIC, 0);
595 spin_lock_bh(&ozhcd->hcd_lock);
596 if (ozhcd->conn_port >= 0) {
597 spin_unlock_bh(&ozhcd->hcd_lock);
598 oz_trace("conn_port >= 0\n");
601 for (i = 0; i < OZ_NB_PORTS; i++) {
602 struct oz_port *port = &ozhcd->ports[i];
603 spin_lock(&port->port_lock);
604 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
605 oz_acquire_port(port, hpd);
606 spin_unlock(&port->port_lock);
609 spin_unlock(&port->port_lock);
611 if (i < OZ_NB_PORTS) {
612 oz_trace("Setting conn_port = %d\n", i);
613 ozhcd->conn_port = i;
614 /* Attach out endpoint 0.
616 ozhcd->ports[i].out_ep[0] = ep;
618 hport = &ozhcd->ports[i];
619 spin_unlock_bh(&ozhcd->hcd_lock);
620 if (ozhcd->flags & OZ_HDC_F_SUSPENDED) {
621 oz_trace("Resuming root hub\n");
622 usb_hcd_resume_root_hub(ozhcd->hcd);
624 usb_hcd_poll_rh_status(ozhcd->hcd);
626 spin_unlock_bh(&ozhcd->hcd_lock);
629 if (ep) /* ep is non-null if not used. */
634 /*------------------------------------------------------------------------------
635 * This is called by the protocol handler to notify that the PD has gone away.
636 * We need to deallocate all resources and then request that the root hub is
637 * polled. We release the reference we hold on the PD.
640 void oz_hcd_pd_departed(void *hport)
642 struct oz_port *port = (struct oz_port *)hport;
643 struct oz_hcd *ozhcd;
645 struct oz_endpoint *ep = 0;
647 oz_trace("oz_hcd_pd_departed()\n");
649 oz_trace("oz_hcd_pd_departed() port = 0\n");
655 /* Check if this is the connection port - if so clear it.
657 spin_lock_bh(&ozhcd->hcd_lock);
658 if ((ozhcd->conn_port >= 0) &&
659 (port == &ozhcd->ports[ozhcd->conn_port])) {
660 oz_trace("Clearing conn_port\n");
661 ozhcd->conn_port = -1;
663 spin_lock(&port->port_lock);
664 port->flags |= OZ_PORT_F_DYING;
665 spin_unlock(&port->port_lock);
666 spin_unlock_bh(&ozhcd->hcd_lock);
668 oz_clean_endpoints_for_config(ozhcd->hcd, port);
669 spin_lock_bh(&port->port_lock);
672 port->bus_addr = 0xff;
673 port->flags &= ~(OZ_PORT_F_PRESENT | OZ_PORT_F_DYING);
674 port->flags |= OZ_PORT_F_CHANGED;
675 port->status &= ~USB_PORT_STAT_CONNECTION;
676 port->status |= (USB_PORT_STAT_C_CONNECTION << 16);
677 /* If there is an endpont 0 then clear the pointer while we hold
678 * the spinlock be we deallocate it after releasing the lock.
680 if (port->out_ep[0]) {
681 ep = port->out_ep[0];
684 spin_unlock_bh(&port->port_lock);
686 oz_ep_free(port, ep);
687 usb_hcd_poll_rh_status(ozhcd->hcd);
690 /*------------------------------------------------------------------------------
693 void oz_hcd_pd_reset(void *hpd, void *hport)
695 /* Cleanup the current configuration and report reset to the core.
697 struct oz_port *port = (struct oz_port *)hport;
698 struct oz_hcd *ozhcd = port->ozhcd;
699 oz_trace("PD Reset\n");
700 spin_lock_bh(&port->port_lock);
701 port->flags |= OZ_PORT_F_CHANGED;
702 port->status |= USB_PORT_STAT_RESET;
703 port->status |= (USB_PORT_STAT_C_RESET << 16);
704 spin_unlock_bh(&port->port_lock);
705 oz_clean_endpoints_for_config(ozhcd->hcd, port);
706 usb_hcd_poll_rh_status(ozhcd->hcd);
708 /*------------------------------------------------------------------------------
711 void oz_hcd_get_desc_cnf(void *hport, u8 req_id, int status, u8 *desc,
712 int length, int offset, int total_size)
714 struct oz_port *port = (struct oz_port *)hport;
718 oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, status);
719 oz_trace("oz_hcd_get_desc_cnf length = %d offs = %d tot_size = %d\n",
720 length, offset, total_size);
721 urb = oz_find_urb_by_id(port, 0, req_id);
726 int required_size = urb->transfer_buffer_length;
727 if (required_size > total_size)
728 required_size = total_size;
729 copy_len = required_size-offset;
730 if (length <= copy_len)
732 memcpy(urb->transfer_buffer+offset, desc, copy_len);
734 if (offset < required_size) {
735 struct usb_ctrlrequest *setup =
736 (struct usb_ctrlrequest *)urb->setup_packet;
737 unsigned wvalue = le16_to_cpu(setup->wValue);
738 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
740 else if (oz_usb_get_desc_req(port->hpd, req_id,
741 setup->bRequestType, (u8)(wvalue>>8),
742 (u8)wvalue, setup->wIndex, offset,
743 required_size-offset)) {
744 oz_dequeue_ep_urb(port, 0, 0, urb);
751 urb->actual_length = total_size;
752 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
754 /*------------------------------------------------------------------------------
758 static void oz_display_conf_type(u8 t)
761 case USB_REQ_GET_STATUS:
762 oz_trace("USB_REQ_GET_STATUS - cnf\n");
764 case USB_REQ_CLEAR_FEATURE:
765 oz_trace("USB_REQ_CLEAR_FEATURE - cnf\n");
767 case USB_REQ_SET_FEATURE:
768 oz_trace("USB_REQ_SET_FEATURE - cnf\n");
770 case USB_REQ_SET_ADDRESS:
771 oz_trace("USB_REQ_SET_ADDRESS - cnf\n");
773 case USB_REQ_GET_DESCRIPTOR:
774 oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n");
776 case USB_REQ_SET_DESCRIPTOR:
777 oz_trace("USB_REQ_SET_DESCRIPTOR - cnf\n");
779 case USB_REQ_GET_CONFIGURATION:
780 oz_trace("USB_REQ_GET_CONFIGURATION - cnf\n");
782 case USB_REQ_SET_CONFIGURATION:
783 oz_trace("USB_REQ_SET_CONFIGURATION - cnf\n");
785 case USB_REQ_GET_INTERFACE:
786 oz_trace("USB_REQ_GET_INTERFACE - cnf\n");
788 case USB_REQ_SET_INTERFACE:
789 oz_trace("USB_REQ_SET_INTERFACE - cnf\n");
791 case USB_REQ_SYNCH_FRAME:
792 oz_trace("USB_REQ_SYNCH_FRAME - cnf\n");
797 #define oz_display_conf_type(__x)
798 #endif /* WANT_TRACE */
799 /*------------------------------------------------------------------------------
802 static void oz_hcd_complete_set_config(struct oz_port *port, struct urb *urb,
803 u8 rcode, u8 config_num)
806 struct usb_hcd *hcd = port->ozhcd->hcd;
808 port->config_num = config_num;
809 oz_clean_endpoints_for_config(hcd, port);
810 if (oz_build_endpoints_for_config(hcd, port,
811 &urb->dev->config[port->config_num-1], GFP_ATOMIC)) {
817 oz_complete_urb(hcd, urb, rc, 0);
819 /*------------------------------------------------------------------------------
822 static void oz_hcd_complete_set_interface(struct oz_port *port, struct urb *urb,
823 u8 rcode, u8 if_num, u8 alt)
825 struct usb_hcd *hcd = port->ozhcd->hcd;
828 struct usb_host_config *config;
829 struct usb_host_interface *intf;
830 oz_trace("Set interface %d alt %d\n", if_num, alt);
831 oz_clean_endpoints_for_interface(hcd, port, if_num);
832 config = &urb->dev->config[port->config_num-1];
833 intf = &config->intf_cache[if_num]->altsetting[alt];
834 if (oz_build_endpoints_for_interface(hcd, port, intf,
838 port->iface[if_num].alt = alt;
842 oz_complete_urb(hcd, urb, rc, 0);
844 /*------------------------------------------------------------------------------
847 void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, u8 *data,
850 struct oz_port *port = (struct oz_port *)hport;
852 struct usb_ctrlrequest *setup;
853 struct usb_hcd *hcd = port->ozhcd->hcd;
857 oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, rcode);
858 oz_trace("oz_hcd_control_cnf rcode=%u len=%d\n", rcode, data_len);
859 urb = oz_find_urb_by_id(port, 0, req_id);
861 oz_trace("URB not found\n");
864 setup = (struct usb_ctrlrequest *)urb->setup_packet;
865 windex = le16_to_cpu(setup->wIndex);
866 wvalue = le16_to_cpu(setup->wValue);
867 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
868 /* Standard requests */
869 oz_display_conf_type(setup->bRequest);
870 switch (setup->bRequest) {
871 case USB_REQ_SET_CONFIGURATION:
872 oz_hcd_complete_set_config(port, urb, rcode,
875 case USB_REQ_SET_INTERFACE:
876 oz_hcd_complete_set_interface(port, urb, rcode,
877 (u8)windex, (u8)wvalue);
880 oz_complete_urb(hcd, urb, 0, 0);
885 oz_trace("VENDOR-CLASS - cnf\n");
886 if (data_len <= urb->transfer_buffer_length)
889 copy_len = urb->transfer_buffer_length;
891 memcpy(urb->transfer_buffer, data, copy_len);
892 urb->actual_length = copy_len;
893 oz_complete_urb(hcd, urb, 0, 0);
896 /*------------------------------------------------------------------------------
897 * Context: softirq-serialized
899 static int oz_hcd_buffer_data(struct oz_endpoint *ep, u8 *data, int data_len)
905 space = ep->out_ix-ep->in_ix-1;
907 space += ep->buffer_size;
908 if (space < (data_len+1)) {
909 oz_trace("Buffer full\n");
912 ep->buffer[ep->in_ix] = (u8)data_len;
913 if (++ep->in_ix == ep->buffer_size)
915 copy_len = ep->buffer_size - ep->in_ix;
916 if (copy_len > data_len)
918 memcpy(&ep->buffer[ep->in_ix], data, copy_len);
920 if (copy_len < data_len) {
921 memcpy(ep->buffer, data+copy_len, data_len-copy_len);
922 ep->in_ix = data_len-copy_len;
924 ep->in_ix += copy_len;
926 if (ep->in_ix == ep->buffer_size)
928 ep->buffered_units++;
931 /*------------------------------------------------------------------------------
932 * Context: softirq-serialized
934 void oz_hcd_data_ind(void *hport, u8 endpoint, u8 *data, int data_len)
936 struct oz_port *port = (struct oz_port *)hport;
937 struct oz_endpoint *ep;
938 struct oz_hcd *ozhcd = port->ozhcd;
939 spin_lock_bh(&ozhcd->hcd_lock);
940 ep = port->in_ep[endpoint & USB_ENDPOINT_NUMBER_MASK];
943 switch (ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) {
944 case USB_ENDPOINT_XFER_INT:
945 case USB_ENDPOINT_XFER_BULK:
946 if (!list_empty(&ep->urb_list)) {
947 struct oz_urb_link *urbl =
948 list_first_entry(&ep->urb_list,
949 struct oz_urb_link, link);
952 list_del_init(&urbl->link);
953 spin_unlock_bh(&ozhcd->hcd_lock);
955 oz_free_urb_link(urbl);
956 if (data_len <= urb->transfer_buffer_length)
959 copy_len = urb->transfer_buffer_length;
960 memcpy(urb->transfer_buffer, data, copy_len);
961 urb->actual_length = copy_len;
962 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
966 case USB_ENDPOINT_XFER_ISOC:
967 oz_hcd_buffer_data(ep, data, data_len);
971 spin_unlock_bh(&ozhcd->hcd_lock);
973 /*------------------------------------------------------------------------------
976 static inline int oz_usb_get_frame_number(void)
978 return jiffies_to_msecs(get_jiffies_64());
980 /*------------------------------------------------------------------------------
983 int oz_hcd_heartbeat(void *hport)
986 struct oz_port *port = (struct oz_port *)hport;
987 struct oz_hcd *ozhcd = port->ozhcd;
988 struct oz_urb_link *urbl;
989 struct list_head xfr_list;
993 struct oz_endpoint *ep;
994 unsigned long now = jiffies;
995 INIT_LIST_HEAD(&xfr_list);
996 /* Check the OUT isoc endpoints to see if any URB data can be sent.
998 spin_lock_bh(&ozhcd->hcd_lock);
999 list_for_each(e, &port->isoc_out_ep) {
1000 ep = ep_from_link(e);
1003 ep->credit += (now - ep->last_jiffies);
1004 if (ep->credit > ep->credit_ceiling)
1005 ep->credit = ep->credit_ceiling;
1006 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0, ep->credit);
1007 ep->last_jiffies = now;
1008 while (ep->credit && !list_empty(&ep->urb_list)) {
1009 urbl = list_first_entry(&ep->urb_list,
1010 struct oz_urb_link, link);
1012 if (ep->credit < urb->number_of_packets)
1014 ep->credit -= urb->number_of_packets;
1015 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0,
1017 list_del(&urbl->link);
1018 list_add_tail(&urbl->link, &xfr_list);
1021 spin_unlock_bh(&ozhcd->hcd_lock);
1022 /* Send to PD and complete URBs.
1024 list_for_each_safe(e, n, &xfr_list) {
1026 urbl = container_of(e, struct oz_urb_link, link);
1028 t = urbl->submit_jiffies;
1030 urb->error_count = 0;
1031 urb->start_frame = oz_usb_get_frame_number();
1032 oz_usb_send_isoc(port->hpd, urbl->ep_num, urb);
1033 oz_free_urb_link(urbl);
1034 oz_complete_urb(port->ozhcd->hcd, urb, 0, t);
1036 /* Check the IN isoc endpoints to see if any URBs can be completed.
1038 spin_lock_bh(&ozhcd->hcd_lock);
1039 list_for_each(e, &port->isoc_in_ep) {
1040 struct oz_endpoint *ep = ep_from_link(e);
1041 if (ep->flags & OZ_F_EP_BUFFERING) {
1042 if (ep->buffered_units * OZ_IN_BUFFERING_UNITS) {
1043 ep->flags &= ~OZ_F_EP_BUFFERING;
1045 oz_event_log(OZ_EVT_EP_CREDIT,
1046 ep->ep_num | USB_DIR_IN,
1048 ep->last_jiffies = now;
1049 ep->start_frame = 0;
1050 oz_event_log(OZ_EVT_EP_BUFFERING,
1051 ep->ep_num | USB_DIR_IN, 0, 0, 0);
1055 ep->credit += (now - ep->last_jiffies);
1056 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
1058 ep->last_jiffies = now;
1059 while (!list_empty(&ep->urb_list)) {
1060 struct oz_urb_link *urbl =
1061 list_first_entry(&ep->urb_list,
1062 struct oz_urb_link, link);
1063 struct urb *urb = urbl->urb;
1067 if (ep->credit < urb->number_of_packets)
1069 if (ep->buffered_units < urb->number_of_packets)
1071 urb->actual_length = 0;
1072 for (i = 0; i < urb->number_of_packets; i++) {
1073 len = ep->buffer[ep->out_ix];
1074 if (++ep->out_ix == ep->buffer_size)
1076 copy_len = ep->buffer_size - ep->out_ix;
1079 memcpy(urb->transfer_buffer,
1080 &ep->buffer[ep->out_ix], copy_len);
1081 if (copy_len < len) {
1082 memcpy(urb->transfer_buffer+copy_len,
1083 ep->buffer, len-copy_len);
1084 ep->out_ix = len-copy_len;
1086 ep->out_ix += copy_len;
1087 if (ep->out_ix == ep->buffer_size)
1089 urb->iso_frame_desc[i].offset =
1091 urb->actual_length += len;
1092 urb->iso_frame_desc[i].actual_length = len;
1093 urb->iso_frame_desc[i].status = 0;
1095 ep->buffered_units -= urb->number_of_packets;
1096 urb->error_count = 0;
1097 urb->start_frame = ep->start_frame;
1098 ep->start_frame += urb->number_of_packets;
1099 list_del(&urbl->link);
1100 list_add_tail(&urbl->link, &xfr_list);
1101 ep->credit -= urb->number_of_packets;
1102 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
1106 if (!list_empty(&port->isoc_out_ep) || !list_empty(&port->isoc_in_ep))
1108 spin_unlock_bh(&ozhcd->hcd_lock);
1109 /* Complete the filled URBs.
1111 list_for_each_safe(e, n, &xfr_list) {
1112 urbl = container_of(e, struct oz_urb_link, link);
1115 oz_free_urb_link(urbl);
1116 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
1118 /* Check if there are any ep0 requests that have timed out.
1119 * If so resent to PD.
1121 ep = port->out_ep[0];
1123 struct list_head *e;
1124 struct list_head *n;
1125 spin_lock_bh(&ozhcd->hcd_lock);
1126 list_for_each_safe(e, n, &ep->urb_list) {
1127 urbl = container_of(e, struct oz_urb_link, link);
1128 if (time_after(now, urbl->submit_jiffies+HZ/2)) {
1129 oz_trace("%ld: Request 0x%p timeout\n",
1131 urbl->submit_jiffies = now;
1133 list_add_tail(e, &xfr_list);
1136 if (!list_empty(&ep->urb_list))
1138 spin_unlock_bh(&ozhcd->hcd_lock);
1140 while (e != &xfr_list) {
1141 urbl = container_of(e, struct oz_urb_link, link);
1143 oz_trace("Resending request to PD.\n");
1144 oz_process_ep0_urb(ozhcd, urbl->urb, GFP_ATOMIC);
1145 oz_free_urb_link(urbl);
1150 /*------------------------------------------------------------------------------
1153 static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
1154 struct oz_port *port,
1155 struct usb_host_interface *intf, gfp_t mem_flags)
1157 struct oz_hcd *ozhcd = port->ozhcd;
1159 int if_ix = intf->desc.bInterfaceNumber;
1160 int request_heartbeat = 0;
1161 oz_trace("interface[%d] = %p\n", if_ix, intf);
1162 for (i = 0; i < intf->desc.bNumEndpoints; i++) {
1163 struct usb_host_endpoint *hep = &intf->endpoint[i];
1164 u8 ep_addr = hep->desc.bEndpointAddress;
1165 u8 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
1166 struct oz_endpoint *ep;
1167 int buffer_size = 0;
1169 oz_trace("%d bEndpointAddress = %x\n", i, ep_addr);
1170 if ((ep_addr & USB_ENDPOINT_DIR_MASK) &&
1171 ((hep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1172 == USB_ENDPOINT_XFER_ISOC)) {
1173 buffer_size = 24*1024;
1176 ep = oz_ep_alloc(mem_flags, buffer_size);
1178 oz_clean_endpoints_for_interface(hcd, port, if_ix);
1181 ep->attrib = hep->desc.bmAttributes;
1182 ep->ep_num = ep_num;
1183 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1184 == USB_ENDPOINT_XFER_ISOC) {
1185 oz_trace("wMaxPacketSize = %d\n",
1186 hep->desc.wMaxPacketSize);
1187 ep->credit_ceiling = 200;
1188 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1189 ep->flags |= OZ_F_EP_BUFFERING;
1190 oz_event_log(OZ_EVT_EP_BUFFERING,
1191 ep->ep_num | USB_DIR_IN, 1, 0, 0);
1193 ep->flags |= OZ_F_EP_HAVE_STREAM;
1194 if (oz_usb_stream_create(port->hpd, ep_num))
1195 ep->flags &= ~OZ_F_EP_HAVE_STREAM;
1198 spin_lock_bh(&ozhcd->hcd_lock);
1199 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1200 port->in_ep[ep_num] = ep;
1201 port->iface[if_ix].ep_mask |=
1202 (1<<(ep_num+OZ_NB_ENDPOINTS));
1203 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1204 == USB_ENDPOINT_XFER_ISOC) {
1205 list_add_tail(&ep->link, &port->isoc_in_ep);
1206 request_heartbeat = 1;
1209 port->out_ep[ep_num] = ep;
1210 port->iface[if_ix].ep_mask |= (1<<ep_num);
1211 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1212 == USB_ENDPOINT_XFER_ISOC) {
1213 list_add_tail(&ep->link, &port->isoc_out_ep);
1214 request_heartbeat = 1;
1217 spin_unlock_bh(&ozhcd->hcd_lock);
1218 if (request_heartbeat && port->hpd)
1219 oz_usb_request_heartbeat(port->hpd);
1223 /*------------------------------------------------------------------------------
1226 static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
1227 struct oz_port *port, int if_ix)
1229 struct oz_hcd *ozhcd = port->ozhcd;
1232 struct list_head ep_list;
1234 oz_trace("Deleting endpoints for interface %d\n", if_ix);
1235 if (if_ix >= port->num_iface)
1237 INIT_LIST_HEAD(&ep_list);
1238 spin_lock_bh(&ozhcd->hcd_lock);
1239 mask = port->iface[if_ix].ep_mask;
1240 port->iface[if_ix].ep_mask = 0;
1241 for (i = 0; i < OZ_NB_ENDPOINTS; i++) {
1242 struct list_head *e;
1243 /* Gather OUT endpoints.
1245 if ((mask & (1<<i)) && port->out_ep[i]) {
1246 e = &port->out_ep[i]->link;
1247 port->out_ep[i] = 0;
1248 /* Remove from isoc list if present.
1251 list_add_tail(e, &ep_list);
1253 /* Gather IN endpoints.
1255 if ((mask & (1<<(i+OZ_NB_ENDPOINTS))) && port->in_ep[i]) {
1256 e = &port->in_ep[i]->link;
1259 list_add_tail(e, &ep_list);
1262 spin_unlock_bh(&ozhcd->hcd_lock);
1263 while (!list_empty(&ep_list)) {
1264 struct oz_endpoint *ep =
1265 list_first_entry(&ep_list, struct oz_endpoint, link);
1266 list_del_init(&ep->link);
1267 oz_ep_free(port, ep);
1270 /*------------------------------------------------------------------------------
1273 static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
1274 struct oz_port *port, struct usb_host_config *config,
1277 struct oz_hcd *ozhcd = port->ozhcd;
1279 int num_iface = config->desc.bNumInterfaces;
1281 struct oz_interface *iface;
1283 iface = kmalloc(num_iface*sizeof(struct oz_interface),
1284 mem_flags | __GFP_ZERO);
1287 spin_lock_bh(&ozhcd->hcd_lock);
1288 port->iface = iface;
1289 port->num_iface = num_iface;
1290 spin_unlock_bh(&ozhcd->hcd_lock);
1292 for (i = 0; i < num_iface; i++) {
1293 struct usb_host_interface *intf =
1294 &config->intf_cache[i]->altsetting[0];
1295 if (oz_build_endpoints_for_interface(hcd, port, intf,
1301 oz_clean_endpoints_for_config(hcd, port);
1304 /*------------------------------------------------------------------------------
1307 static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
1308 struct oz_port *port)
1310 struct oz_hcd *ozhcd = port->ozhcd;
1312 oz_trace("Deleting endpoints for configuration.\n");
1313 for (i = 0; i < port->num_iface; i++)
1314 oz_clean_endpoints_for_interface(hcd, port, i);
1315 spin_lock_bh(&ozhcd->hcd_lock);
1317 oz_trace("Freeing interfaces object.\n");
1321 port->num_iface = 0;
1322 spin_unlock_bh(&ozhcd->hcd_lock);
1324 /*------------------------------------------------------------------------------
1327 static void *oz_claim_hpd(struct oz_port *port)
1330 struct oz_hcd *ozhcd = port->ozhcd;
1331 spin_lock_bh(&ozhcd->hcd_lock);
1335 spin_unlock_bh(&ozhcd->hcd_lock);
1338 /*------------------------------------------------------------------------------
1341 static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
1344 struct usb_ctrlrequest *setup;
1351 unsigned complete = 0;
1354 struct oz_port *port = 0;
1356 oz_trace2(OZ_TRACE_URB, "%lu: oz_process_ep0_urb(%p)\n", jiffies, urb);
1357 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1362 port = &ozhcd->ports[port_ix];
1363 if (((port->flags & OZ_PORT_F_PRESENT) == 0)
1364 || (port->flags & OZ_PORT_F_DYING)) {
1365 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1366 port_ix, urb->dev->devnum);
1370 /* Store port in private context data.
1373 setup = (struct usb_ctrlrequest *)urb->setup_packet;
1374 windex = le16_to_cpu(setup->wIndex);
1375 wvalue = le16_to_cpu(setup->wValue);
1376 wlength = le16_to_cpu(setup->wLength);
1377 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequestType = %x\n",
1378 setup->bRequestType);
1379 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequest = %x\n", setup->bRequest);
1380 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wValue = %x\n", wvalue);
1381 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wIndex = %x\n", windex);
1382 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wLength = %x\n", wlength);
1384 req_id = port->next_req_id++;
1385 hpd = oz_claim_hpd(port);
1387 oz_trace("Cannot claim port\n");
1392 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1393 /* Standard requests
1395 switch (setup->bRequest) {
1396 case USB_REQ_GET_DESCRIPTOR:
1397 oz_trace("USB_REQ_GET_DESCRIPTOR - req\n");
1399 case USB_REQ_SET_ADDRESS:
1400 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest,
1401 0, 0, setup->bRequestType);
1402 oz_trace("USB_REQ_SET_ADDRESS - req\n");
1403 oz_trace("Port %d address is 0x%x\n", ozhcd->conn_port,
1404 (u8)le16_to_cpu(setup->wValue));
1405 spin_lock_bh(&ozhcd->hcd_lock);
1406 if (ozhcd->conn_port >= 0) {
1407 ozhcd->ports[ozhcd->conn_port].bus_addr =
1408 (u8)le16_to_cpu(setup->wValue);
1409 oz_trace("Clearing conn_port\n");
1410 ozhcd->conn_port = -1;
1412 spin_unlock_bh(&ozhcd->hcd_lock);
1415 case USB_REQ_SET_CONFIGURATION:
1416 oz_trace("USB_REQ_SET_CONFIGURATION - req\n");
1418 case USB_REQ_GET_CONFIGURATION:
1419 /* We short curcuit this case and reply directly since
1420 * we have the selected configuration number cached.
1422 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0,
1423 setup->bRequestType);
1424 oz_trace("USB_REQ_GET_CONFIGURATION - reply now\n");
1425 if (urb->transfer_buffer_length >= 1) {
1426 urb->actual_length = 1;
1427 *((u8 *)urb->transfer_buffer) =
1434 case USB_REQ_GET_INTERFACE:
1435 /* We short curcuit this case and reply directly since
1436 * we have the selected interface alternative cached.
1438 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0,
1439 setup->bRequestType);
1440 oz_trace("USB_REQ_GET_INTERFACE - reply now\n");
1441 if (urb->transfer_buffer_length >= 1) {
1442 urb->actual_length = 1;
1443 *((u8 *)urb->transfer_buffer) =
1444 port->iface[(u8)windex].alt;
1445 oz_trace("interface = %d alt = %d\n",
1446 windex, port->iface[(u8)windex].alt);
1452 case USB_REQ_SET_INTERFACE:
1453 oz_trace("USB_REQ_SET_INTERFACE - req\n");
1457 if (!rc && !complete) {
1459 if ((setup->bRequestType & USB_DIR_IN) == 0)
1461 if (oz_usb_control_req(port->hpd, req_id, setup,
1462 urb->transfer_buffer, data_len)) {
1465 /* Note: we are queuing the request after we have
1466 * submitted it to be tranmitted. If the request were
1467 * to complete before we queued it then it would not
1468 * be found in the queue. It seems impossible for
1469 * this to happen but if it did the request would
1470 * be resubmitted so the problem would hopefully
1471 * resolve itself. Putting the request into the
1472 * queue before it has been sent is worse since the
1473 * urb could be cancelled while we are using it
1474 * to build the request.
1476 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
1482 if (rc || complete) {
1483 oz_trace("Completing request locally\n");
1484 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1486 oz_usb_request_heartbeat(port->hpd);
1489 /*------------------------------------------------------------------------------
1492 static int oz_urb_process(struct oz_hcd *ozhcd, struct urb *urb)
1495 struct oz_port *port = urb->hcpriv;
1497 /* When we are paranoid we keep a list of urbs which we check against
1498 * before handing one back. This is just for debugging during
1499 * development and should be turned off in the released driver.
1501 oz_remember_urb(urb);
1502 /* Check buffer is valid.
1504 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1506 /* Check if there is a device at the port - refuse if not.
1508 if ((port->flags & OZ_PORT_F_PRESENT) == 0)
1510 ep_addr = usb_pipeendpoint(urb->pipe);
1512 /* If the request is not for EP0 then queue it.
1514 if (oz_enqueue_ep_urb(port, ep_addr, usb_pipein(urb->pipe),
1518 oz_process_ep0_urb(ozhcd, urb, GFP_ATOMIC);
1522 /*------------------------------------------------------------------------------
1525 static void oz_urb_process_tasklet(unsigned long unused)
1527 unsigned long irq_state;
1529 struct oz_hcd *ozhcd = oz_hcd_claim();
1533 /* This is called from a tasklet so is in softirq context but the urb
1534 * list is filled from any context so we need to lock
1535 * appropriately while removing urbs.
1537 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1538 while (!list_empty(&ozhcd->urb_pending_list)) {
1539 struct oz_urb_link *urbl =
1540 list_first_entry(&ozhcd->urb_pending_list,
1541 struct oz_urb_link, link);
1542 list_del_init(&urbl->link);
1543 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1545 oz_free_urb_link(urbl);
1546 rc = oz_urb_process(ozhcd, urb);
1548 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1549 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1551 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1554 /*------------------------------------------------------------------------------
1555 * This function searches for the urb in any of the lists it could be in.
1556 * If it is found it is removed from the list and completed. If the urb is
1557 * being processed then it won't be in a list so won't be found. However, the
1558 * call to usb_hcd_check_unlink_urb() will set the value of the unlinked field
1559 * to a non-zero value. When an attempt is made to put the urb back in a list
1560 * the unlinked field will be checked and the urb will then be completed.
1563 static void oz_urb_cancel(struct oz_port *port, u8 ep_num, struct urb *urb)
1565 struct oz_urb_link *urbl = 0;
1566 struct list_head *e;
1567 struct oz_hcd *ozhcd;
1568 unsigned long irq_state;
1571 oz_trace("ERRORERROR: oz_urb_cancel(%p) port is null\n", urb);
1574 ozhcd = port->ozhcd;
1576 oz_trace("ERRORERROR: oz_urb_cancel(%p) ozhcd is null\n", urb);
1580 /* Look in the tasklet queue.
1582 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1583 list_for_each(e, &ozhcd->urb_cancel_list) {
1584 urbl = container_of(e, struct oz_urb_link, link);
1585 if (urb == urbl->urb) {
1587 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1591 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1594 /* Look in the orphanage.
1596 spin_lock_irqsave(&ozhcd->hcd_lock, irq_state);
1597 list_for_each(e, &ozhcd->orphanage) {
1598 urbl = container_of(e, struct oz_urb_link, link);
1599 if (urbl->urb == urb) {
1601 oz_trace("Found urb in orphanage\n");
1605 ix = (ep_num & 0xf);
1607 if ((ep_num & USB_DIR_IN) && ix)
1608 urbl = oz_remove_urb(port->in_ep[ix], urb);
1610 urbl = oz_remove_urb(port->out_ep[ix], urb);
1612 spin_unlock_irqrestore(&ozhcd->hcd_lock, irq_state);
1615 urb->actual_length = 0;
1616 oz_free_urb_link(urbl);
1617 oz_complete_urb(ozhcd->hcd, urb, -EPIPE, 0);
1620 /*------------------------------------------------------------------------------
1623 static void oz_urb_cancel_tasklet(unsigned long unused)
1625 unsigned long irq_state;
1627 struct oz_hcd *ozhcd = oz_hcd_claim();
1630 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1631 while (!list_empty(&ozhcd->urb_cancel_list)) {
1632 struct oz_urb_link *urbl =
1633 list_first_entry(&ozhcd->urb_cancel_list,
1634 struct oz_urb_link, link);
1635 list_del_init(&urbl->link);
1636 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1639 oz_urb_cancel(urbl->port, urbl->ep_num, urb);
1640 oz_free_urb_link(urbl);
1641 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1643 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1646 /*------------------------------------------------------------------------------
1649 static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status)
1652 struct oz_urb_link *urbl;
1653 while (!list_empty(&ozhcd->orphanage)) {
1654 urbl = list_first_entry(&ozhcd->orphanage,
1655 struct oz_urb_link, link);
1656 list_del(&urbl->link);
1657 oz_complete_urb(ozhcd->hcd, urbl->urb, status, 0);
1658 oz_free_urb_link(urbl);
1662 /*------------------------------------------------------------------------------
1665 static int oz_hcd_start(struct usb_hcd *hcd)
1667 oz_trace("oz_hcd_start()\n");
1668 hcd->power_budget = 200;
1669 hcd->state = HC_STATE_RUNNING;
1670 hcd->uses_new_polling = 1;
1673 /*------------------------------------------------------------------------------
1676 static void oz_hcd_stop(struct usb_hcd *hcd)
1678 oz_trace("oz_hcd_stop()\n");
1680 /*------------------------------------------------------------------------------
1683 static void oz_hcd_shutdown(struct usb_hcd *hcd)
1685 oz_trace("oz_hcd_shutdown()\n");
1687 /*------------------------------------------------------------------------------
1690 #ifdef WANT_EVENT_TRACE
1691 static u8 oz_get_irq_ctx(void)
1700 #endif /* WANT_EVENT_TRACE */
1701 /*------------------------------------------------------------------------------
1702 * Called to queue an urb for the device.
1703 * This function should return a non-zero error code if it fails the urb but
1704 * should not call usb_hcd_giveback_urb().
1707 static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1710 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1713 struct oz_port *port;
1714 unsigned long irq_state;
1715 struct oz_urb_link *urbl;
1716 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_enqueue(%p)\n",
1718 oz_event_log(OZ_EVT_URB_SUBMIT, oz_get_irq_ctx(),
1719 (u16)urb->number_of_packets, urb, urb->pipe);
1720 if (unlikely(ozhcd == 0)) {
1721 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not ozhcd.\n",
1725 if (unlikely(hcd->state != HC_STATE_RUNNING)) {
1726 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not running.\n",
1730 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1733 port = &ozhcd->ports[port_ix];
1736 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
1737 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1738 port_ix, urb->dev->devnum);
1742 /* Put request in queue for processing by tasklet.
1744 urbl = oz_alloc_urb_link();
1745 if (unlikely(urbl == 0))
1748 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1749 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1751 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1752 oz_free_urb_link(urbl);
1755 list_add_tail(&urbl->link, &ozhcd->urb_pending_list);
1756 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1757 tasklet_schedule(&g_urb_process_tasklet);
1758 atomic_inc(&g_pending_urbs);
1761 /*------------------------------------------------------------------------------
1764 static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
1767 struct oz_urb_link *urbl = 0;
1768 struct list_head *e;
1769 if (unlikely(ep == 0))
1771 list_for_each(e, &ep->urb_list) {
1772 urbl = container_of(e, struct oz_urb_link, link);
1773 if (urbl->urb == urb) {
1775 if (usb_pipeisoc(urb->pipe)) {
1776 ep->credit -= urb->number_of_packets;
1779 oz_event_log(OZ_EVT_EP_CREDIT,
1780 usb_pipein(urb->pipe) ?
1781 (ep->ep_num | USB_DIR_IN) : ep->ep_num,
1789 /*------------------------------------------------------------------------------
1790 * Called to dequeue a previously submitted urb for the device.
1793 static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1795 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1796 struct oz_urb_link *urbl = 0;
1798 unsigned long irq_state;
1799 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_dequeue(%p)\n", jiffies, urb);
1800 urbl = oz_alloc_urb_link();
1801 if (unlikely(urbl == 0))
1803 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1804 /* The following function checks the urb is still in the queue
1805 * maintained by the core and that the unlinked field is zero.
1806 * If both are true the function sets the unlinked field and returns
1807 * zero. Otherwise it returns an error.
1809 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1810 /* We have to check we haven't completed the urb or are about
1811 * to complete it. When we do we set hcpriv to 0 so if this has
1812 * already happened we don't put the urb in the cancel queue.
1814 if ((rc == 0) && urb->hcpriv) {
1816 urbl->port = (struct oz_port *)urb->hcpriv;
1817 urbl->ep_num = usb_pipeendpoint(urb->pipe);
1818 if (usb_pipein(urb->pipe))
1819 urbl->ep_num |= USB_DIR_IN;
1820 list_add_tail(&urbl->link, &ozhcd->urb_cancel_list);
1821 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1822 tasklet_schedule(&g_urb_cancel_tasklet);
1824 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1825 oz_free_urb_link(urbl);
1829 /*------------------------------------------------------------------------------
1832 static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
1833 struct usb_host_endpoint *ep)
1835 oz_trace("oz_hcd_endpoint_disable\n");
1837 /*------------------------------------------------------------------------------
1840 static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
1841 struct usb_host_endpoint *ep)
1843 oz_trace("oz_hcd_endpoint_reset\n");
1845 /*------------------------------------------------------------------------------
1848 static int oz_hcd_get_frame_number(struct usb_hcd *hcd)
1850 oz_trace("oz_hcd_get_frame_number\n");
1851 return oz_usb_get_frame_number();
1853 /*------------------------------------------------------------------------------
1855 * This is called as a consquence of us calling usb_hcd_poll_rh_status() and we
1856 * always do that in softirq context.
1858 static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
1860 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1863 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_status_data()\n");
1866 spin_lock_bh(&ozhcd->hcd_lock);
1867 for (i = 0; i < OZ_NB_PORTS; i++) {
1868 if (ozhcd->ports[i].flags & OZ_PORT_F_CHANGED) {
1869 oz_trace2(OZ_TRACE_HUB, "Port %d changed\n", i);
1870 ozhcd->ports[i].flags &= ~OZ_PORT_F_CHANGED;
1874 spin_unlock_bh(&ozhcd->hcd_lock);
1875 return buf[0] ? 1 : 0;
1877 /*------------------------------------------------------------------------------
1880 static void oz_get_hub_descriptor(struct usb_hcd *hcd,
1881 struct usb_hub_descriptor *desc)
1883 oz_trace2(OZ_TRACE_HUB, "GetHubDescriptor\n");
1884 memset(desc, 0, sizeof(*desc));
1885 desc->bDescriptorType = 0x29;
1886 desc->bDescLength = 9;
1887 desc->wHubCharacteristics = (__force __u16)
1888 __constant_cpu_to_le16(0x0001);
1889 desc->bNbrPorts = OZ_NB_PORTS;
1891 /*------------------------------------------------------------------------------
1894 static int oz_set_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
1896 struct oz_port *port;
1898 u8 port_id = (u8)windex;
1899 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1900 unsigned set_bits = 0;
1901 unsigned clear_bits = 0;
1902 oz_trace2(OZ_TRACE_HUB, "SetPortFeature\n");
1903 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
1905 port = &ozhcd->ports[port_id-1];
1907 case USB_PORT_FEAT_CONNECTION:
1908 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
1910 case USB_PORT_FEAT_ENABLE:
1911 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
1913 case USB_PORT_FEAT_SUSPEND:
1914 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
1916 case USB_PORT_FEAT_OVER_CURRENT:
1917 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
1919 case USB_PORT_FEAT_RESET:
1920 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
1921 set_bits = USB_PORT_STAT_ENABLE | (USB_PORT_STAT_C_RESET<<16);
1922 clear_bits = USB_PORT_STAT_RESET;
1923 ozhcd->ports[port_id-1].bus_addr = 0;
1925 case USB_PORT_FEAT_POWER:
1926 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
1927 set_bits |= USB_PORT_STAT_POWER;
1929 case USB_PORT_FEAT_LOWSPEED:
1930 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
1932 case USB_PORT_FEAT_C_CONNECTION:
1933 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
1935 case USB_PORT_FEAT_C_ENABLE:
1936 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
1938 case USB_PORT_FEAT_C_SUSPEND:
1939 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
1941 case USB_PORT_FEAT_C_OVER_CURRENT:
1942 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
1944 case USB_PORT_FEAT_C_RESET:
1945 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
1947 case USB_PORT_FEAT_TEST:
1948 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
1950 case USB_PORT_FEAT_INDICATOR:
1951 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
1954 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
1957 if (set_bits || clear_bits) {
1958 spin_lock_bh(&port->port_lock);
1959 port->status &= ~clear_bits;
1960 port->status |= set_bits;
1961 spin_unlock_bh(&port->port_lock);
1963 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
1967 /*------------------------------------------------------------------------------
1970 static int oz_clear_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
1972 struct oz_port *port;
1974 u8 port_id = (u8)windex;
1975 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1976 unsigned clear_bits = 0;
1977 oz_trace2(OZ_TRACE_HUB, "ClearPortFeature\n");
1978 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
1980 port = &ozhcd->ports[port_id-1];
1982 case USB_PORT_FEAT_CONNECTION:
1983 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
1985 case USB_PORT_FEAT_ENABLE:
1986 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
1987 clear_bits = USB_PORT_STAT_ENABLE;
1989 case USB_PORT_FEAT_SUSPEND:
1990 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
1992 case USB_PORT_FEAT_OVER_CURRENT:
1993 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
1995 case USB_PORT_FEAT_RESET:
1996 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
1998 case USB_PORT_FEAT_POWER:
1999 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
2000 clear_bits |= USB_PORT_STAT_POWER;
2002 case USB_PORT_FEAT_LOWSPEED:
2003 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
2005 case USB_PORT_FEAT_C_CONNECTION:
2006 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
2007 clear_bits = (USB_PORT_STAT_C_CONNECTION << 16);
2009 case USB_PORT_FEAT_C_ENABLE:
2010 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
2011 clear_bits = (USB_PORT_STAT_C_ENABLE << 16);
2013 case USB_PORT_FEAT_C_SUSPEND:
2014 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
2016 case USB_PORT_FEAT_C_OVER_CURRENT:
2017 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
2019 case USB_PORT_FEAT_C_RESET:
2020 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
2021 clear_bits = (USB_PORT_FEAT_C_RESET << 16);
2023 case USB_PORT_FEAT_TEST:
2024 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
2026 case USB_PORT_FEAT_INDICATOR:
2027 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
2030 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
2034 spin_lock_bh(&port->port_lock);
2035 port->status &= ~clear_bits;
2036 spin_unlock_bh(&port->port_lock);
2038 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
2039 ozhcd->ports[port_id-1].status);
2042 /*------------------------------------------------------------------------------
2045 static int oz_get_port_status(struct usb_hcd *hcd, u16 windex, char *buf)
2047 struct oz_hcd *ozhcd;
2049 if ((windex < 1) || (windex > OZ_NB_PORTS))
2051 ozhcd = oz_hcd_private(hcd);
2052 oz_trace2(OZ_TRACE_HUB, "GetPortStatus windex = %d\n", windex);
2053 status = ozhcd->ports[windex-1].status;
2054 put_unaligned(cpu_to_le32(status), (__le32 *)buf);
2055 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = %x\n", windex, status);
2058 /*------------------------------------------------------------------------------
2061 static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
2062 u16 windex, char *buf, u16 wlength)
2065 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_control()\n");
2067 case ClearHubFeature:
2068 oz_trace2(OZ_TRACE_HUB, "ClearHubFeature: %d\n", req_type);
2070 case ClearPortFeature:
2071 err = oz_clear_port_feature(hcd, wvalue, windex);
2073 case GetHubDescriptor:
2074 oz_get_hub_descriptor(hcd, (struct usb_hub_descriptor *)buf);
2077 oz_trace2(OZ_TRACE_HUB, "GetHubStatus: req_type = 0x%x\n",
2079 put_unaligned(__constant_cpu_to_le32(0), (__le32 *)buf);
2082 err = oz_get_port_status(hcd, windex, buf);
2085 oz_trace2(OZ_TRACE_HUB, "SetHubFeature: %d\n", req_type);
2087 case SetPortFeature:
2088 err = oz_set_port_feature(hcd, wvalue, windex);
2091 oz_trace2(OZ_TRACE_HUB, "Other: %d\n", req_type);
2096 /*------------------------------------------------------------------------------
2099 static int oz_hcd_bus_suspend(struct usb_hcd *hcd)
2101 struct oz_hcd *ozhcd;
2102 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_suspend()\n");
2103 ozhcd = oz_hcd_private(hcd);
2104 spin_lock_bh(&ozhcd->hcd_lock);
2105 hcd->state = HC_STATE_SUSPENDED;
2106 ozhcd->flags |= OZ_HDC_F_SUSPENDED;
2107 spin_unlock_bh(&ozhcd->hcd_lock);
2110 /*------------------------------------------------------------------------------
2113 static int oz_hcd_bus_resume(struct usb_hcd *hcd)
2115 struct oz_hcd *ozhcd;
2116 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_resume()\n");
2117 ozhcd = oz_hcd_private(hcd);
2118 spin_lock_bh(&ozhcd->hcd_lock);
2119 ozhcd->flags &= ~OZ_HDC_F_SUSPENDED;
2120 hcd->state = HC_STATE_RUNNING;
2121 spin_unlock_bh(&ozhcd->hcd_lock);
2124 /*------------------------------------------------------------------------------
2126 static void oz_plat_shutdown(struct platform_device *dev)
2128 oz_trace("oz_plat_shutdown()\n");
2130 /*------------------------------------------------------------------------------
2133 static int oz_plat_probe(struct platform_device *dev)
2137 struct usb_hcd *hcd;
2138 struct oz_hcd *ozhcd;
2139 oz_trace("oz_plat_probe()\n");
2140 hcd = usb_create_hcd(&g_oz_hc_drv, &dev->dev, dev_name(&dev->dev));
2142 oz_trace("Failed to created hcd object OK\n");
2145 ozhcd = oz_hcd_private(hcd);
2146 memset(ozhcd, 0, sizeof(*ozhcd));
2147 INIT_LIST_HEAD(&ozhcd->urb_pending_list);
2148 INIT_LIST_HEAD(&ozhcd->urb_cancel_list);
2149 INIT_LIST_HEAD(&ozhcd->orphanage);
2151 ozhcd->conn_port = -1;
2152 spin_lock_init(&ozhcd->hcd_lock);
2153 for (i = 0; i < OZ_NB_PORTS; i++) {
2154 struct oz_port *port = &ozhcd->ports[i];
2155 port->ozhcd = ozhcd;
2158 port->bus_addr = 0xff;
2159 spin_lock_init(&port->port_lock);
2161 err = usb_add_hcd(hcd, 0, 0);
2163 oz_trace("Failed to add hcd object OK\n");
2167 spin_lock_bh(&g_hcdlock);
2169 spin_unlock_bh(&g_hcdlock);
2172 /*------------------------------------------------------------------------------
2175 static int oz_plat_remove(struct platform_device *dev)
2177 struct usb_hcd *hcd = platform_get_drvdata(dev);
2178 struct oz_hcd *ozhcd;
2179 oz_trace("oz_plat_remove()\n");
2182 ozhcd = oz_hcd_private(hcd);
2183 spin_lock_bh(&g_hcdlock);
2184 if (ozhcd == g_ozhcd)
2186 spin_unlock_bh(&g_hcdlock);
2187 oz_trace("Clearing orphanage\n");
2188 oz_hcd_clear_orphanage(ozhcd, -EPIPE);
2189 oz_trace("Removing hcd\n");
2190 usb_remove_hcd(hcd);
2192 oz_empty_link_pool();
2195 /*------------------------------------------------------------------------------
2198 static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg)
2200 oz_trace("oz_plat_suspend()\n");
2203 /*------------------------------------------------------------------------------
2206 static int oz_plat_resume(struct platform_device *dev)
2208 oz_trace("oz_plat_resume()\n");
2211 /*------------------------------------------------------------------------------
2214 int oz_hcd_init(void)
2219 tasklet_init(&g_urb_process_tasklet, oz_urb_process_tasklet, 0);
2220 tasklet_init(&g_urb_cancel_tasklet, oz_urb_cancel_tasklet, 0);
2221 err = platform_driver_register(&g_oz_plat_drv);
2222 oz_trace("platform_driver_register() returned %d\n", err);
2225 g_plat_dev = platform_device_alloc(OZ_PLAT_DEV_NAME, -1);
2226 if (g_plat_dev == 0) {
2230 oz_trace("platform_device_alloc() succeeded\n");
2231 err = platform_device_add(g_plat_dev);
2234 oz_trace("platform_device_add() succeeded\n");
2237 platform_device_put(g_plat_dev);
2239 platform_driver_unregister(&g_oz_plat_drv);
2241 tasklet_disable(&g_urb_process_tasklet);
2242 tasklet_disable(&g_urb_cancel_tasklet);
2243 oz_trace("oz_hcd_init() failed %d\n", err);
2246 /*------------------------------------------------------------------------------
2249 void oz_hcd_term(void)
2251 tasklet_disable(&g_urb_process_tasklet);
2252 tasklet_disable(&g_urb_cancel_tasklet);
2253 platform_device_unregister(g_plat_dev);
2254 platform_driver_unregister(&g_oz_plat_drv);
2255 oz_trace("Pending urbs:%d\n", atomic_read(&g_pending_urbs));