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 = NULL;
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);
284 /*------------------------------------------------------------------------------
285 * Deallocates all the urb links in the pool.
288 static void oz_empty_link_pool(void)
291 unsigned long irq_state;
292 spin_lock_irqsave(&g_link_lock, irq_state);
295 g_link_pool_size = 0;
296 spin_unlock_irqrestore(&g_link_lock, irq_state);
298 struct oz_urb_link *urbl =
299 container_of(e, struct oz_urb_link, link);
304 /*------------------------------------------------------------------------------
305 * Allocates endpoint structure and optionally a buffer. If a buffer is
306 * allocated it immediately follows the endpoint structure.
309 static struct oz_endpoint *oz_ep_alloc(gfp_t mem_flags, int buffer_size)
311 struct oz_endpoint *ep =
312 kzalloc(sizeof(struct oz_endpoint)+buffer_size, mem_flags);
314 INIT_LIST_HEAD(&ep->urb_list);
315 INIT_LIST_HEAD(&ep->link);
318 ep->buffer_size = buffer_size;
319 ep->buffer = (u8 *)(ep+1);
324 /*------------------------------------------------------------------------------
325 * Pre-condition: Must be called with g_tasklet_lock held and interrupts
327 * Context: softirq or process
329 static struct oz_urb_link *oz_uncancel_urb(struct oz_hcd *ozhcd, struct urb *urb)
331 struct oz_urb_link *urbl;
333 list_for_each(e, &ozhcd->urb_cancel_list) {
334 urbl = container_of(e, struct oz_urb_link, link);
335 if (urb == urbl->urb) {
342 /*------------------------------------------------------------------------------
343 * This is called when we have finished processing an urb. It unlinks it from
344 * the ep and returns it to the core.
345 * Context: softirq or process
347 static void oz_complete_urb(struct usb_hcd *hcd, struct urb *urb,
348 int status, unsigned long submit_jiffies)
350 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
351 unsigned long irq_state;
352 struct oz_urb_link *cancel_urbl = NULL;
353 spin_lock_irqsave(&g_tasklet_lock, irq_state);
354 usb_hcd_unlink_urb_from_ep(hcd, urb);
355 /* Clear hcpriv which will prevent it being put in the cancel list
356 * in the event that an attempt is made to cancel it.
359 /* Walk the cancel list in case the urb is already sitting there.
360 * Since we process the cancel list in a tasklet rather than in
361 * the dequeue function this could happen.
363 cancel_urbl = oz_uncancel_urb(ozhcd, urb);
364 /* Note: we release lock but do not enable local irqs.
365 * It appears that usb_hcd_giveback_urb() expects irqs to be disabled,
366 * or at least other host controllers disable interrupts at this point
367 * so we do the same. We must, however, release the lock otherwise a
368 * deadlock will occur if an urb is submitted to our driver in the urb
369 * completion function. Because we disable interrupts it is possible
370 * that the urb_enqueue function can be called with them disabled.
372 spin_unlock(&g_tasklet_lock);
373 if (oz_forget_urb(urb)) {
374 oz_trace("OZWPAN: ERROR Unknown URB %p\n", urb);
376 static unsigned long last_time;
377 atomic_dec(&g_pending_urbs);
378 oz_trace2(OZ_TRACE_URB,
379 "%lu: giveback_urb(%p,%x) %lu %lu pending:%d\n",
380 jiffies, urb, status, jiffies-submit_jiffies,
381 jiffies-last_time, atomic_read(&g_pending_urbs));
383 usb_hcd_giveback_urb(hcd, urb, status);
385 spin_lock(&g_tasklet_lock);
386 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
388 oz_free_urb_link(cancel_urbl);
390 /*------------------------------------------------------------------------------
391 * Deallocates an endpoint including deallocating any associated stream and
392 * returning any queued urbs to the core.
395 static void oz_ep_free(struct oz_port *port, struct oz_endpoint *ep)
397 oz_trace("oz_ep_free()\n");
399 struct list_head list;
400 struct oz_hcd *ozhcd = port->ozhcd;
401 INIT_LIST_HEAD(&list);
402 if (ep->flags & OZ_F_EP_HAVE_STREAM)
403 oz_usb_stream_delete(port->hpd, ep->ep_num);
404 /* Transfer URBs to the orphanage while we hold the lock. */
405 spin_lock_bh(&ozhcd->hcd_lock);
406 /* Note: this works even if ep->urb_list is empty.*/
407 list_replace_init(&ep->urb_list, &list);
408 /* Put the URBs in the orphanage. */
409 list_splice_tail(&list, &ozhcd->orphanage);
410 spin_unlock_bh(&ozhcd->hcd_lock);
412 oz_trace("Freeing endpoint memory\n");
415 /*------------------------------------------------------------------------------
418 static void oz_complete_buffered_urb(struct oz_port *port,
419 struct oz_endpoint *ep,
422 u8 data_len, available_space, copy_len;
424 memcpy(&data_len, &ep->buffer[ep->out_ix], sizeof(u8));
425 if (data_len <= urb->transfer_buffer_length)
426 available_space = data_len;
428 available_space = urb->transfer_buffer_length;
430 if (++ep->out_ix == ep->buffer_size)
432 copy_len = ep->buffer_size - ep->out_ix;
433 if (copy_len >= available_space)
434 copy_len = available_space;
435 memcpy(urb->transfer_buffer, &ep->buffer[ep->out_ix], copy_len);
437 if (copy_len < available_space) {
438 memcpy((urb->transfer_buffer + copy_len), ep->buffer,
439 (available_space - copy_len));
440 ep->out_ix = available_space - copy_len;
442 ep->out_ix += copy_len;
444 urb->actual_length = available_space;
445 if (ep->out_ix == ep->buffer_size)
448 ep->buffered_units--;
449 oz_trace("Trying to give back buffered frame of size=%d\n",
451 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
454 /*------------------------------------------------------------------------------
457 static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
458 struct urb *urb, u8 req_id)
460 struct oz_urb_link *urbl;
461 struct oz_endpoint *ep;
463 if (ep_addr >= OZ_NB_ENDPOINTS) {
464 oz_trace("Invalid endpoint number in oz_enqueue_ep_urb().\n");
467 urbl = oz_alloc_urb_link();
470 urbl->submit_jiffies = jiffies;
472 urbl->req_id = req_id;
473 urbl->ep_num = ep_addr;
474 /* Hold lock while we insert the URB into the list within the
475 * endpoint structure.
477 spin_lock_bh(&port->ozhcd->hcd_lock);
478 /* If the urb has been unlinked while out of any list then
482 spin_unlock_bh(&port->ozhcd->hcd_lock);
483 oz_trace("urb %p unlinked so complete immediately\n", urb);
484 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
485 oz_free_urb_link(urbl);
489 ep = port->in_ep[ep_addr];
491 ep = port->out_ep[ep_addr];
493 /*For interrupt endpoint check for buffered data
496 if (((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
497 && ep->buffered_units > 0) {
498 oz_free_urb_link(urbl);
499 spin_unlock_bh(&port->ozhcd->hcd_lock);
500 oz_complete_buffered_urb(port, ep, urb);
504 if (ep && port->hpd) {
505 list_add_tail(&urbl->link, &ep->urb_list);
506 if (!in_dir && ep_addr && (ep->credit < 0)) {
507 ep->last_jiffies = jiffies;
513 spin_unlock_bh(&port->ozhcd->hcd_lock);
515 oz_free_urb_link(urbl);
518 /*------------------------------------------------------------------------------
519 * Removes an urb from the queue in the endpoint.
520 * Returns 0 if it is found and -EIDRM otherwise.
523 static int oz_dequeue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
526 struct oz_urb_link *urbl = NULL;
527 struct oz_endpoint *ep;
528 spin_lock_bh(&port->ozhcd->hcd_lock);
530 ep = port->in_ep[ep_addr];
532 ep = port->out_ep[ep_addr];
535 list_for_each(e, &ep->urb_list) {
536 urbl = container_of(e, struct oz_urb_link, link);
537 if (urbl->urb == urb) {
544 spin_unlock_bh(&port->ozhcd->hcd_lock);
546 oz_free_urb_link(urbl);
547 return urbl ? 0 : -EIDRM;
549 /*------------------------------------------------------------------------------
550 * Finds an urb given its request id.
553 static struct urb *oz_find_urb_by_id(struct oz_port *port, int ep_ix,
556 struct oz_hcd *ozhcd = port->ozhcd;
557 struct urb *urb = NULL;
558 struct oz_urb_link *urbl = NULL;
559 struct oz_endpoint *ep;
561 spin_lock_bh(&ozhcd->hcd_lock);
562 ep = port->out_ep[ep_ix];
565 list_for_each(e, &ep->urb_list) {
566 urbl = container_of(e, struct oz_urb_link, link);
567 if (urbl->req_id == req_id) {
574 spin_unlock_bh(&ozhcd->hcd_lock);
575 /* If urb is non-zero then we we must have an urb link to delete.
578 oz_free_urb_link(urbl);
581 /*------------------------------------------------------------------------------
582 * Pre-condition: Port lock must be held.
585 static void oz_acquire_port(struct oz_port *port, void *hpd)
587 INIT_LIST_HEAD(&port->isoc_out_ep);
588 INIT_LIST_HEAD(&port->isoc_in_ep);
589 port->flags |= OZ_PORT_F_PRESENT | OZ_PORT_F_CHANGED;
590 port->status |= USB_PORT_STAT_CONNECTION |
591 (USB_PORT_STAT_C_CONNECTION << 16);
595 /*------------------------------------------------------------------------------
598 static struct oz_hcd *oz_hcd_claim(void)
600 struct oz_hcd *ozhcd;
601 spin_lock_bh(&g_hcdlock);
604 usb_get_hcd(ozhcd->hcd);
605 spin_unlock_bh(&g_hcdlock);
608 /*------------------------------------------------------------------------------
611 static inline void oz_hcd_put(struct oz_hcd *ozhcd)
614 usb_put_hcd(ozhcd->hcd);
616 /*------------------------------------------------------------------------------
617 * This is called by the protocol handler to notify that a PD has arrived.
618 * We allocate a port to associate with the PD and create a structure for
619 * endpoint 0. This port is made the connection port.
620 * In the event that one of the other port is already a connection port then
622 * TODO We should be able to do better than fail and should be able remember
623 * that this port needs configuring and make it the connection port once the
624 * current connection port has been assigned an address. Collisions here are
625 * probably very rare indeed.
628 void *oz_hcd_pd_arrived(void *hpd)
632 struct oz_hcd *ozhcd = NULL;
633 struct oz_endpoint *ep;
634 oz_trace("oz_hcd_pd_arrived()\n");
635 ozhcd = oz_hcd_claim();
638 /* Allocate an endpoint object in advance (before holding hcd lock) to
639 * use for out endpoint 0.
641 ep = oz_ep_alloc(GFP_ATOMIC, 0);
642 spin_lock_bh(&ozhcd->hcd_lock);
643 if (ozhcd->conn_port >= 0) {
644 spin_unlock_bh(&ozhcd->hcd_lock);
645 oz_trace("conn_port >= 0\n");
648 for (i = 0; i < OZ_NB_PORTS; i++) {
649 struct oz_port *port = &ozhcd->ports[i];
650 spin_lock(&port->port_lock);
651 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
652 oz_acquire_port(port, hpd);
653 spin_unlock(&port->port_lock);
656 spin_unlock(&port->port_lock);
658 if (i < OZ_NB_PORTS) {
659 oz_trace("Setting conn_port = %d\n", i);
660 ozhcd->conn_port = i;
661 /* Attach out endpoint 0.
663 ozhcd->ports[i].out_ep[0] = ep;
665 hport = &ozhcd->ports[i];
666 spin_unlock_bh(&ozhcd->hcd_lock);
667 if (ozhcd->flags & OZ_HDC_F_SUSPENDED) {
668 oz_trace("Resuming root hub\n");
669 usb_hcd_resume_root_hub(ozhcd->hcd);
671 usb_hcd_poll_rh_status(ozhcd->hcd);
673 spin_unlock_bh(&ozhcd->hcd_lock);
676 if (ep) /* ep is non-null if not used. */
677 oz_ep_free(NULL, ep);
681 /*------------------------------------------------------------------------------
682 * This is called by the protocol handler to notify that the PD has gone away.
683 * We need to deallocate all resources and then request that the root hub is
684 * polled. We release the reference we hold on the PD.
687 void oz_hcd_pd_departed(void *hport)
689 struct oz_port *port = (struct oz_port *)hport;
690 struct oz_hcd *ozhcd;
692 struct oz_endpoint *ep = NULL;
694 oz_trace("oz_hcd_pd_departed()\n");
696 oz_trace("oz_hcd_pd_departed() port = 0\n");
702 /* Check if this is the connection port - if so clear it.
704 spin_lock_bh(&ozhcd->hcd_lock);
705 if ((ozhcd->conn_port >= 0) &&
706 (port == &ozhcd->ports[ozhcd->conn_port])) {
707 oz_trace("Clearing conn_port\n");
708 ozhcd->conn_port = -1;
710 spin_lock(&port->port_lock);
711 port->flags |= OZ_PORT_F_DYING;
712 spin_unlock(&port->port_lock);
713 spin_unlock_bh(&ozhcd->hcd_lock);
715 oz_clean_endpoints_for_config(ozhcd->hcd, port);
716 spin_lock_bh(&port->port_lock);
719 port->bus_addr = 0xff;
720 port->flags &= ~(OZ_PORT_F_PRESENT | OZ_PORT_F_DYING);
721 port->flags |= OZ_PORT_F_CHANGED;
722 port->status &= ~USB_PORT_STAT_CONNECTION;
723 port->status |= (USB_PORT_STAT_C_CONNECTION << 16);
724 /* If there is an endpont 0 then clear the pointer while we hold
725 * the spinlock be we deallocate it after releasing the lock.
727 if (port->out_ep[0]) {
728 ep = port->out_ep[0];
729 port->out_ep[0] = NULL;
731 spin_unlock_bh(&port->port_lock);
733 oz_ep_free(port, ep);
734 usb_hcd_poll_rh_status(ozhcd->hcd);
737 /*------------------------------------------------------------------------------
740 void oz_hcd_pd_reset(void *hpd, void *hport)
742 /* Cleanup the current configuration and report reset to the core.
744 struct oz_port *port = (struct oz_port *)hport;
745 struct oz_hcd *ozhcd = port->ozhcd;
746 oz_trace("PD Reset\n");
747 spin_lock_bh(&port->port_lock);
748 port->flags |= OZ_PORT_F_CHANGED;
749 port->status |= USB_PORT_STAT_RESET;
750 port->status |= (USB_PORT_STAT_C_RESET << 16);
751 spin_unlock_bh(&port->port_lock);
752 oz_clean_endpoints_for_config(ozhcd->hcd, port);
753 usb_hcd_poll_rh_status(ozhcd->hcd);
755 /*------------------------------------------------------------------------------
758 void oz_hcd_get_desc_cnf(void *hport, u8 req_id, int status, const u8 *desc,
759 int length, int offset, int total_size)
761 struct oz_port *port = (struct oz_port *)hport;
765 oz_trace("oz_hcd_get_desc_cnf length = %d offs = %d tot_size = %d\n",
766 length, offset, total_size);
767 urb = oz_find_urb_by_id(port, 0, req_id);
772 int required_size = urb->transfer_buffer_length;
773 if (required_size > total_size)
774 required_size = total_size;
775 copy_len = required_size-offset;
776 if (length <= copy_len)
778 memcpy(urb->transfer_buffer+offset, desc, copy_len);
780 if (offset < required_size) {
781 struct usb_ctrlrequest *setup =
782 (struct usb_ctrlrequest *)urb->setup_packet;
783 unsigned wvalue = le16_to_cpu(setup->wValue);
784 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
786 else if (oz_usb_get_desc_req(port->hpd, req_id,
787 setup->bRequestType, (u8)(wvalue>>8),
788 (u8)wvalue, setup->wIndex, offset,
789 required_size-offset)) {
790 oz_dequeue_ep_urb(port, 0, 0, urb);
797 urb->actual_length = total_size;
798 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
800 /*------------------------------------------------------------------------------
804 static void oz_display_conf_type(u8 t)
807 case USB_REQ_GET_STATUS:
808 oz_trace("USB_REQ_GET_STATUS - cnf\n");
810 case USB_REQ_CLEAR_FEATURE:
811 oz_trace("USB_REQ_CLEAR_FEATURE - cnf\n");
813 case USB_REQ_SET_FEATURE:
814 oz_trace("USB_REQ_SET_FEATURE - cnf\n");
816 case USB_REQ_SET_ADDRESS:
817 oz_trace("USB_REQ_SET_ADDRESS - cnf\n");
819 case USB_REQ_GET_DESCRIPTOR:
820 oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n");
822 case USB_REQ_SET_DESCRIPTOR:
823 oz_trace("USB_REQ_SET_DESCRIPTOR - cnf\n");
825 case USB_REQ_GET_CONFIGURATION:
826 oz_trace("USB_REQ_GET_CONFIGURATION - cnf\n");
828 case USB_REQ_SET_CONFIGURATION:
829 oz_trace("USB_REQ_SET_CONFIGURATION - cnf\n");
831 case USB_REQ_GET_INTERFACE:
832 oz_trace("USB_REQ_GET_INTERFACE - cnf\n");
834 case USB_REQ_SET_INTERFACE:
835 oz_trace("USB_REQ_SET_INTERFACE - cnf\n");
837 case USB_REQ_SYNCH_FRAME:
838 oz_trace("USB_REQ_SYNCH_FRAME - cnf\n");
843 #define oz_display_conf_type(__x)
844 #endif /* WANT_TRACE */
845 /*------------------------------------------------------------------------------
848 static void oz_hcd_complete_set_config(struct oz_port *port, struct urb *urb,
849 u8 rcode, u8 config_num)
852 struct usb_hcd *hcd = port->ozhcd->hcd;
854 port->config_num = config_num;
855 oz_clean_endpoints_for_config(hcd, port);
856 if (oz_build_endpoints_for_config(hcd, port,
857 &urb->dev->config[port->config_num-1], GFP_ATOMIC)) {
863 oz_complete_urb(hcd, urb, rc, 0);
865 /*------------------------------------------------------------------------------
868 static void oz_hcd_complete_set_interface(struct oz_port *port, struct urb *urb,
869 u8 rcode, u8 if_num, u8 alt)
871 struct usb_hcd *hcd = port->ozhcd->hcd;
874 struct usb_host_config *config;
875 struct usb_host_interface *intf;
876 oz_trace("Set interface %d alt %d\n", if_num, alt);
877 oz_clean_endpoints_for_interface(hcd, port, if_num);
878 config = &urb->dev->config[port->config_num-1];
879 intf = &config->intf_cache[if_num]->altsetting[alt];
880 if (oz_build_endpoints_for_interface(hcd, port, intf,
884 port->iface[if_num].alt = alt;
888 oz_complete_urb(hcd, urb, rc, 0);
890 /*------------------------------------------------------------------------------
893 void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, const u8 *data,
896 struct oz_port *port = (struct oz_port *)hport;
898 struct usb_ctrlrequest *setup;
899 struct usb_hcd *hcd = port->ozhcd->hcd;
903 oz_trace("oz_hcd_control_cnf rcode=%u len=%d\n", rcode, data_len);
904 urb = oz_find_urb_by_id(port, 0, req_id);
906 oz_trace("URB not found\n");
909 setup = (struct usb_ctrlrequest *)urb->setup_packet;
910 windex = le16_to_cpu(setup->wIndex);
911 wvalue = le16_to_cpu(setup->wValue);
912 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
913 /* Standard requests */
914 oz_display_conf_type(setup->bRequest);
915 switch (setup->bRequest) {
916 case USB_REQ_SET_CONFIGURATION:
917 oz_hcd_complete_set_config(port, urb, rcode,
920 case USB_REQ_SET_INTERFACE:
921 oz_hcd_complete_set_interface(port, urb, rcode,
922 (u8)windex, (u8)wvalue);
925 oz_complete_urb(hcd, urb, 0, 0);
930 oz_trace("VENDOR-CLASS - cnf\n");
932 if (data_len <= urb->transfer_buffer_length)
935 copy_len = urb->transfer_buffer_length;
936 memcpy(urb->transfer_buffer, data, copy_len);
937 urb->actual_length = copy_len;
939 oz_complete_urb(hcd, urb, 0, 0);
942 /*------------------------------------------------------------------------------
943 * Context: softirq-serialized
945 static int oz_hcd_buffer_data(struct oz_endpoint *ep, const u8 *data,
952 space = ep->out_ix-ep->in_ix-1;
954 space += ep->buffer_size;
955 if (space < (data_len+1)) {
956 oz_trace("Buffer full\n");
959 ep->buffer[ep->in_ix] = (u8)data_len;
960 if (++ep->in_ix == ep->buffer_size)
962 copy_len = ep->buffer_size - ep->in_ix;
963 if (copy_len > data_len)
965 memcpy(&ep->buffer[ep->in_ix], data, copy_len);
967 if (copy_len < data_len) {
968 memcpy(ep->buffer, data+copy_len, data_len-copy_len);
969 ep->in_ix = data_len-copy_len;
971 ep->in_ix += copy_len;
973 if (ep->in_ix == ep->buffer_size)
975 ep->buffered_units++;
978 /*------------------------------------------------------------------------------
979 * Context: softirq-serialized
981 void oz_hcd_data_ind(void *hport, u8 endpoint, const u8 *data, int data_len)
983 struct oz_port *port = (struct oz_port *)hport;
984 struct oz_endpoint *ep;
985 struct oz_hcd *ozhcd = port->ozhcd;
986 spin_lock_bh(&ozhcd->hcd_lock);
987 ep = port->in_ep[endpoint & USB_ENDPOINT_NUMBER_MASK];
990 switch (ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) {
991 case USB_ENDPOINT_XFER_INT:
992 case USB_ENDPOINT_XFER_BULK:
993 if (!list_empty(&ep->urb_list)) {
994 struct oz_urb_link *urbl =
995 list_first_entry(&ep->urb_list,
996 struct oz_urb_link, link);
999 list_del_init(&urbl->link);
1000 spin_unlock_bh(&ozhcd->hcd_lock);
1002 oz_free_urb_link(urbl);
1003 if (data_len <= urb->transfer_buffer_length)
1004 copy_len = data_len;
1006 copy_len = urb->transfer_buffer_length;
1007 memcpy(urb->transfer_buffer, data, copy_len);
1008 urb->actual_length = copy_len;
1009 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
1012 oz_trace("buffering frame as URB is not available\n");
1013 oz_hcd_buffer_data(ep, data, data_len);
1016 case USB_ENDPOINT_XFER_ISOC:
1017 oz_hcd_buffer_data(ep, data, data_len);
1021 spin_unlock_bh(&ozhcd->hcd_lock);
1023 /*------------------------------------------------------------------------------
1026 static inline int oz_usb_get_frame_number(void)
1028 return jiffies_to_msecs(get_jiffies_64());
1030 /*------------------------------------------------------------------------------
1033 int oz_hcd_heartbeat(void *hport)
1036 struct oz_port *port = (struct oz_port *)hport;
1037 struct oz_hcd *ozhcd = port->ozhcd;
1038 struct oz_urb_link *urbl;
1039 struct list_head xfr_list;
1040 struct list_head *e;
1041 struct list_head *n;
1043 struct oz_endpoint *ep;
1044 unsigned long now = jiffies;
1045 INIT_LIST_HEAD(&xfr_list);
1046 /* Check the OUT isoc endpoints to see if any URB data can be sent.
1048 spin_lock_bh(&ozhcd->hcd_lock);
1049 list_for_each(e, &port->isoc_out_ep) {
1050 ep = ep_from_link(e);
1053 ep->credit += jiffies_to_msecs(now - ep->last_jiffies);
1054 if (ep->credit > ep->credit_ceiling)
1055 ep->credit = ep->credit_ceiling;
1056 ep->last_jiffies = now;
1057 while (ep->credit && !list_empty(&ep->urb_list)) {
1058 urbl = list_first_entry(&ep->urb_list,
1059 struct oz_urb_link, link);
1061 if ((ep->credit + 1) < urb->number_of_packets)
1063 ep->credit -= urb->number_of_packets;
1064 list_move_tail(&urbl->link, &xfr_list);
1067 spin_unlock_bh(&ozhcd->hcd_lock);
1068 /* Send to PD and complete URBs.
1070 list_for_each_safe(e, n, &xfr_list) {
1072 urbl = container_of(e, struct oz_urb_link, link);
1074 t = urbl->submit_jiffies;
1076 urb->error_count = 0;
1077 urb->start_frame = oz_usb_get_frame_number();
1078 oz_usb_send_isoc(port->hpd, urbl->ep_num, urb);
1079 oz_free_urb_link(urbl);
1080 oz_complete_urb(port->ozhcd->hcd, urb, 0, t);
1082 /* Check the IN isoc endpoints to see if any URBs can be completed.
1084 spin_lock_bh(&ozhcd->hcd_lock);
1085 list_for_each(e, &port->isoc_in_ep) {
1086 struct oz_endpoint *ep = ep_from_link(e);
1087 if (ep->flags & OZ_F_EP_BUFFERING) {
1088 if (ep->buffered_units >= OZ_IN_BUFFERING_UNITS) {
1089 ep->flags &= ~OZ_F_EP_BUFFERING;
1091 ep->last_jiffies = now;
1092 ep->start_frame = 0;
1096 ep->credit += jiffies_to_msecs(now - ep->last_jiffies);
1097 ep->last_jiffies = now;
1098 while (!list_empty(&ep->urb_list)) {
1099 struct oz_urb_link *urbl =
1100 list_first_entry(&ep->urb_list,
1101 struct oz_urb_link, link);
1102 struct urb *urb = urbl->urb;
1106 if ((ep->credit + 1) < urb->number_of_packets)
1108 if (ep->buffered_units < urb->number_of_packets)
1110 urb->actual_length = 0;
1111 for (i = 0; i < urb->number_of_packets; i++) {
1112 len = ep->buffer[ep->out_ix];
1113 if (++ep->out_ix == ep->buffer_size)
1115 copy_len = ep->buffer_size - ep->out_ix;
1118 memcpy(urb->transfer_buffer,
1119 &ep->buffer[ep->out_ix], copy_len);
1120 if (copy_len < len) {
1121 memcpy(urb->transfer_buffer+copy_len,
1122 ep->buffer, len-copy_len);
1123 ep->out_ix = len-copy_len;
1125 ep->out_ix += copy_len;
1126 if (ep->out_ix == ep->buffer_size)
1128 urb->iso_frame_desc[i].offset =
1130 urb->actual_length += len;
1131 urb->iso_frame_desc[i].actual_length = len;
1132 urb->iso_frame_desc[i].status = 0;
1134 ep->buffered_units -= urb->number_of_packets;
1135 urb->error_count = 0;
1136 urb->start_frame = ep->start_frame;
1137 ep->start_frame += urb->number_of_packets;
1138 list_move_tail(&urbl->link, &xfr_list);
1139 ep->credit -= urb->number_of_packets;
1142 if (!list_empty(&port->isoc_out_ep) || !list_empty(&port->isoc_in_ep))
1144 spin_unlock_bh(&ozhcd->hcd_lock);
1145 /* Complete the filled URBs.
1147 list_for_each_safe(e, n, &xfr_list) {
1148 urbl = container_of(e, struct oz_urb_link, link);
1151 oz_free_urb_link(urbl);
1152 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
1154 /* Check if there are any ep0 requests that have timed out.
1155 * If so resent to PD.
1157 ep = port->out_ep[0];
1159 struct list_head *e;
1160 struct list_head *n;
1161 spin_lock_bh(&ozhcd->hcd_lock);
1162 list_for_each_safe(e, n, &ep->urb_list) {
1163 urbl = container_of(e, struct oz_urb_link, link);
1164 if (time_after(now, urbl->submit_jiffies+HZ/2)) {
1165 oz_trace("%ld: Request 0x%p timeout\n",
1167 urbl->submit_jiffies = now;
1168 list_move_tail(e, &xfr_list);
1171 if (!list_empty(&ep->urb_list))
1173 spin_unlock_bh(&ozhcd->hcd_lock);
1175 while (e != &xfr_list) {
1176 urbl = container_of(e, struct oz_urb_link, link);
1178 oz_trace("Resending request to PD.\n");
1179 oz_process_ep0_urb(ozhcd, urbl->urb, GFP_ATOMIC);
1180 oz_free_urb_link(urbl);
1185 /*------------------------------------------------------------------------------
1188 static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
1189 struct oz_port *port,
1190 struct usb_host_interface *intf, gfp_t mem_flags)
1192 struct oz_hcd *ozhcd = port->ozhcd;
1194 int if_ix = intf->desc.bInterfaceNumber;
1195 int request_heartbeat = 0;
1196 oz_trace("interface[%d] = %p\n", if_ix, intf);
1197 for (i = 0; i < intf->desc.bNumEndpoints; i++) {
1198 struct usb_host_endpoint *hep = &intf->endpoint[i];
1199 u8 ep_addr = hep->desc.bEndpointAddress;
1200 u8 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
1201 struct oz_endpoint *ep;
1202 int buffer_size = 0;
1204 oz_trace("%d bEndpointAddress = %x\n", i, ep_addr);
1205 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1206 switch (hep->desc.bmAttributes &
1207 USB_ENDPOINT_XFERTYPE_MASK) {
1208 case USB_ENDPOINT_XFER_ISOC:
1209 buffer_size = 24*1024;
1211 case USB_ENDPOINT_XFER_INT:
1217 ep = oz_ep_alloc(mem_flags, buffer_size);
1219 oz_clean_endpoints_for_interface(hcd, port, if_ix);
1222 ep->attrib = hep->desc.bmAttributes;
1223 ep->ep_num = ep_num;
1224 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1225 == USB_ENDPOINT_XFER_ISOC) {
1226 oz_trace("wMaxPacketSize = %d\n",
1227 usb_endpoint_maxp(&hep->desc));
1228 ep->credit_ceiling = 200;
1229 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1230 ep->flags |= OZ_F_EP_BUFFERING;
1232 ep->flags |= OZ_F_EP_HAVE_STREAM;
1233 if (oz_usb_stream_create(port->hpd, ep_num))
1234 ep->flags &= ~OZ_F_EP_HAVE_STREAM;
1237 spin_lock_bh(&ozhcd->hcd_lock);
1238 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1239 port->in_ep[ep_num] = ep;
1240 port->iface[if_ix].ep_mask |=
1241 (1<<(ep_num+OZ_NB_ENDPOINTS));
1242 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1243 == USB_ENDPOINT_XFER_ISOC) {
1244 list_add_tail(&ep->link, &port->isoc_in_ep);
1245 request_heartbeat = 1;
1248 port->out_ep[ep_num] = ep;
1249 port->iface[if_ix].ep_mask |= (1<<ep_num);
1250 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1251 == USB_ENDPOINT_XFER_ISOC) {
1252 list_add_tail(&ep->link, &port->isoc_out_ep);
1253 request_heartbeat = 1;
1256 spin_unlock_bh(&ozhcd->hcd_lock);
1257 if (request_heartbeat && port->hpd)
1258 oz_usb_request_heartbeat(port->hpd);
1262 /*------------------------------------------------------------------------------
1265 static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
1266 struct oz_port *port, int if_ix)
1268 struct oz_hcd *ozhcd = port->ozhcd;
1271 struct list_head ep_list;
1273 oz_trace("Deleting endpoints for interface %d\n", if_ix);
1274 if (if_ix >= port->num_iface)
1276 INIT_LIST_HEAD(&ep_list);
1277 spin_lock_bh(&ozhcd->hcd_lock);
1278 mask = port->iface[if_ix].ep_mask;
1279 port->iface[if_ix].ep_mask = 0;
1280 for (i = 0; i < OZ_NB_ENDPOINTS; i++) {
1281 struct list_head *e;
1282 /* Gather OUT endpoints.
1284 if ((mask & (1<<i)) && port->out_ep[i]) {
1285 e = &port->out_ep[i]->link;
1286 port->out_ep[i] = NULL;
1287 /* Remove from isoc list if present.
1289 list_move_tail(e, &ep_list);
1291 /* Gather IN endpoints.
1293 if ((mask & (1<<(i+OZ_NB_ENDPOINTS))) && port->in_ep[i]) {
1294 e = &port->in_ep[i]->link;
1295 port->in_ep[i] = NULL;
1296 list_move_tail(e, &ep_list);
1299 spin_unlock_bh(&ozhcd->hcd_lock);
1300 while (!list_empty(&ep_list)) {
1301 struct oz_endpoint *ep =
1302 list_first_entry(&ep_list, struct oz_endpoint, link);
1303 list_del_init(&ep->link);
1304 oz_ep_free(port, ep);
1307 /*------------------------------------------------------------------------------
1310 static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
1311 struct oz_port *port, struct usb_host_config *config,
1314 struct oz_hcd *ozhcd = port->ozhcd;
1316 int num_iface = config->desc.bNumInterfaces;
1318 struct oz_interface *iface;
1320 iface = kmalloc(num_iface*sizeof(struct oz_interface),
1321 mem_flags | __GFP_ZERO);
1324 spin_lock_bh(&ozhcd->hcd_lock);
1325 port->iface = iface;
1326 port->num_iface = num_iface;
1327 spin_unlock_bh(&ozhcd->hcd_lock);
1329 for (i = 0; i < num_iface; i++) {
1330 struct usb_host_interface *intf =
1331 &config->intf_cache[i]->altsetting[0];
1332 if (oz_build_endpoints_for_interface(hcd, port, intf,
1338 oz_clean_endpoints_for_config(hcd, port);
1341 /*------------------------------------------------------------------------------
1344 static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
1345 struct oz_port *port)
1347 struct oz_hcd *ozhcd = port->ozhcd;
1349 oz_trace("Deleting endpoints for configuration.\n");
1350 for (i = 0; i < port->num_iface; i++)
1351 oz_clean_endpoints_for_interface(hcd, port, i);
1352 spin_lock_bh(&ozhcd->hcd_lock);
1354 oz_trace("Freeing interfaces object.\n");
1358 port->num_iface = 0;
1359 spin_unlock_bh(&ozhcd->hcd_lock);
1361 /*------------------------------------------------------------------------------
1364 static void *oz_claim_hpd(struct oz_port *port)
1367 struct oz_hcd *ozhcd = port->ozhcd;
1368 spin_lock_bh(&ozhcd->hcd_lock);
1372 spin_unlock_bh(&ozhcd->hcd_lock);
1375 /*------------------------------------------------------------------------------
1378 static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
1381 struct usb_ctrlrequest *setup;
1388 unsigned complete = 0;
1391 struct oz_port *port = NULL;
1393 oz_trace2(OZ_TRACE_URB, "%lu: oz_process_ep0_urb(%p)\n", jiffies, urb);
1394 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1399 port = &ozhcd->ports[port_ix];
1400 if (((port->flags & OZ_PORT_F_PRESENT) == 0)
1401 || (port->flags & OZ_PORT_F_DYING)) {
1402 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1403 port_ix, urb->dev->devnum);
1407 /* Store port in private context data.
1410 setup = (struct usb_ctrlrequest *)urb->setup_packet;
1411 windex = le16_to_cpu(setup->wIndex);
1412 wvalue = le16_to_cpu(setup->wValue);
1413 wlength = le16_to_cpu(setup->wLength);
1414 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequestType = %x\n",
1415 setup->bRequestType);
1416 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequest = %x\n", setup->bRequest);
1417 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wValue = %x\n", wvalue);
1418 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wIndex = %x\n", windex);
1419 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wLength = %x\n", wlength);
1421 req_id = port->next_req_id++;
1422 hpd = oz_claim_hpd(port);
1424 oz_trace("Cannot claim port\n");
1429 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1430 /* Standard requests
1432 switch (setup->bRequest) {
1433 case USB_REQ_GET_DESCRIPTOR:
1434 oz_trace("USB_REQ_GET_DESCRIPTOR - req\n");
1436 case USB_REQ_SET_ADDRESS:
1437 oz_trace("USB_REQ_SET_ADDRESS - req\n");
1438 oz_trace("Port %d address is 0x%x\n", ozhcd->conn_port,
1439 (u8)le16_to_cpu(setup->wValue));
1440 spin_lock_bh(&ozhcd->hcd_lock);
1441 if (ozhcd->conn_port >= 0) {
1442 ozhcd->ports[ozhcd->conn_port].bus_addr =
1443 (u8)le16_to_cpu(setup->wValue);
1444 oz_trace("Clearing conn_port\n");
1445 ozhcd->conn_port = -1;
1447 spin_unlock_bh(&ozhcd->hcd_lock);
1450 case USB_REQ_SET_CONFIGURATION:
1451 oz_trace("USB_REQ_SET_CONFIGURATION - req\n");
1453 case USB_REQ_GET_CONFIGURATION:
1454 /* We short circuit this case and reply directly since
1455 * we have the selected configuration number cached.
1457 oz_trace("USB_REQ_GET_CONFIGURATION - reply now\n");
1458 if (urb->transfer_buffer_length >= 1) {
1459 urb->actual_length = 1;
1460 *((u8 *)urb->transfer_buffer) =
1467 case USB_REQ_GET_INTERFACE:
1468 /* We short circuit this case and reply directly since
1469 * we have the selected interface alternative cached.
1471 oz_trace("USB_REQ_GET_INTERFACE - reply now\n");
1472 if (urb->transfer_buffer_length >= 1) {
1473 urb->actual_length = 1;
1474 *((u8 *)urb->transfer_buffer) =
1475 port->iface[(u8)windex].alt;
1476 oz_trace("interface = %d alt = %d\n",
1477 windex, port->iface[(u8)windex].alt);
1483 case USB_REQ_SET_INTERFACE:
1484 oz_trace("USB_REQ_SET_INTERFACE - req\n");
1488 if (!rc && !complete) {
1490 if ((setup->bRequestType & USB_DIR_IN) == 0)
1492 urb->actual_length = data_len;
1493 if (oz_usb_control_req(port->hpd, req_id, setup,
1494 urb->transfer_buffer, data_len)) {
1497 /* Note: we are queuing the request after we have
1498 * submitted it to be transmitted. If the request were
1499 * to complete before we queued it then it would not
1500 * be found in the queue. It seems impossible for
1501 * this to happen but if it did the request would
1502 * be resubmitted so the problem would hopefully
1503 * resolve itself. Putting the request into the
1504 * queue before it has been sent is worse since the
1505 * urb could be cancelled while we are using it
1506 * to build the request.
1508 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
1514 if (rc || complete) {
1515 oz_trace("Completing request locally\n");
1516 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1518 oz_usb_request_heartbeat(port->hpd);
1521 /*------------------------------------------------------------------------------
1524 static int oz_urb_process(struct oz_hcd *ozhcd, struct urb *urb)
1527 struct oz_port *port = urb->hcpriv;
1529 /* When we are paranoid we keep a list of urbs which we check against
1530 * before handing one back. This is just for debugging during
1531 * development and should be turned off in the released driver.
1533 oz_remember_urb(urb);
1534 /* Check buffer is valid.
1536 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1538 /* Check if there is a device at the port - refuse if not.
1540 if ((port->flags & OZ_PORT_F_PRESENT) == 0)
1542 ep_addr = usb_pipeendpoint(urb->pipe);
1544 /* If the request is not for EP0 then queue it.
1546 if (oz_enqueue_ep_urb(port, ep_addr, usb_pipein(urb->pipe),
1550 oz_process_ep0_urb(ozhcd, urb, GFP_ATOMIC);
1554 /*------------------------------------------------------------------------------
1557 static void oz_urb_process_tasklet(unsigned long unused)
1559 unsigned long irq_state;
1561 struct oz_hcd *ozhcd = oz_hcd_claim();
1565 /* This is called from a tasklet so is in softirq context but the urb
1566 * list is filled from any context so we need to lock
1567 * appropriately while removing urbs.
1569 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1570 while (!list_empty(&ozhcd->urb_pending_list)) {
1571 struct oz_urb_link *urbl =
1572 list_first_entry(&ozhcd->urb_pending_list,
1573 struct oz_urb_link, link);
1574 list_del_init(&urbl->link);
1575 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1577 oz_free_urb_link(urbl);
1578 rc = oz_urb_process(ozhcd, urb);
1580 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1581 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1583 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1586 /*------------------------------------------------------------------------------
1587 * This function searches for the urb in any of the lists it could be in.
1588 * If it is found it is removed from the list and completed. If the urb is
1589 * being processed then it won't be in a list so won't be found. However, the
1590 * call to usb_hcd_check_unlink_urb() will set the value of the unlinked field
1591 * to a non-zero value. When an attempt is made to put the urb back in a list
1592 * the unlinked field will be checked and the urb will then be completed.
1595 static void oz_urb_cancel(struct oz_port *port, u8 ep_num, struct urb *urb)
1597 struct oz_urb_link *urbl = NULL;
1598 struct list_head *e;
1599 struct oz_hcd *ozhcd;
1600 unsigned long irq_state;
1603 oz_trace("ERRORERROR: oz_urb_cancel(%p) port is null\n", urb);
1606 ozhcd = port->ozhcd;
1607 if (ozhcd == NULL) {
1608 oz_trace("ERRORERROR: oz_urb_cancel(%p) ozhcd is null\n", urb);
1612 /* Look in the tasklet queue.
1614 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1615 list_for_each(e, &ozhcd->urb_cancel_list) {
1616 urbl = container_of(e, struct oz_urb_link, link);
1617 if (urb == urbl->urb) {
1619 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1623 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1626 /* Look in the orphanage.
1628 spin_lock_irqsave(&ozhcd->hcd_lock, irq_state);
1629 list_for_each(e, &ozhcd->orphanage) {
1630 urbl = container_of(e, struct oz_urb_link, link);
1631 if (urbl->urb == urb) {
1633 oz_trace("Found urb in orphanage\n");
1637 ix = (ep_num & 0xf);
1639 if ((ep_num & USB_DIR_IN) && ix)
1640 urbl = oz_remove_urb(port->in_ep[ix], urb);
1642 urbl = oz_remove_urb(port->out_ep[ix], urb);
1644 spin_unlock_irqrestore(&ozhcd->hcd_lock, irq_state);
1647 urb->actual_length = 0;
1648 oz_free_urb_link(urbl);
1649 oz_complete_urb(ozhcd->hcd, urb, -EPIPE, 0);
1652 /*------------------------------------------------------------------------------
1655 static void oz_urb_cancel_tasklet(unsigned long unused)
1657 unsigned long irq_state;
1659 struct oz_hcd *ozhcd = oz_hcd_claim();
1662 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1663 while (!list_empty(&ozhcd->urb_cancel_list)) {
1664 struct oz_urb_link *urbl =
1665 list_first_entry(&ozhcd->urb_cancel_list,
1666 struct oz_urb_link, link);
1667 list_del_init(&urbl->link);
1668 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1671 oz_urb_cancel(urbl->port, urbl->ep_num, urb);
1672 oz_free_urb_link(urbl);
1673 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1675 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1678 /*------------------------------------------------------------------------------
1681 static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status)
1684 struct oz_urb_link *urbl;
1685 while (!list_empty(&ozhcd->orphanage)) {
1686 urbl = list_first_entry(&ozhcd->orphanage,
1687 struct oz_urb_link, link);
1688 list_del(&urbl->link);
1689 oz_complete_urb(ozhcd->hcd, urbl->urb, status, 0);
1690 oz_free_urb_link(urbl);
1694 /*------------------------------------------------------------------------------
1697 static int oz_hcd_start(struct usb_hcd *hcd)
1699 oz_trace("oz_hcd_start()\n");
1700 hcd->power_budget = 200;
1701 hcd->state = HC_STATE_RUNNING;
1702 hcd->uses_new_polling = 1;
1705 /*------------------------------------------------------------------------------
1708 static void oz_hcd_stop(struct usb_hcd *hcd)
1710 oz_trace("oz_hcd_stop()\n");
1712 /*------------------------------------------------------------------------------
1715 static void oz_hcd_shutdown(struct usb_hcd *hcd)
1717 oz_trace("oz_hcd_shutdown()\n");
1719 /*------------------------------------------------------------------------------
1720 * Called to queue an urb for the device.
1721 * This function should return a non-zero error code if it fails the urb but
1722 * should not call usb_hcd_giveback_urb().
1725 static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1728 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1731 struct oz_port *port;
1732 unsigned long irq_state;
1733 struct oz_urb_link *urbl;
1734 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_enqueue(%p)\n",
1736 if (unlikely(ozhcd == NULL)) {
1737 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not ozhcd.\n",
1741 if (unlikely(hcd->state != HC_STATE_RUNNING)) {
1742 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not running.\n",
1746 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1749 port = &ozhcd->ports[port_ix];
1752 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
1753 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1754 port_ix, urb->dev->devnum);
1758 /* Put request in queue for processing by tasklet.
1760 urbl = oz_alloc_urb_link();
1761 if (unlikely(urbl == NULL))
1764 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1765 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1767 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1768 oz_free_urb_link(urbl);
1771 list_add_tail(&urbl->link, &ozhcd->urb_pending_list);
1772 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1773 tasklet_schedule(&g_urb_process_tasklet);
1774 atomic_inc(&g_pending_urbs);
1777 /*------------------------------------------------------------------------------
1780 static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
1783 struct oz_urb_link *urbl = NULL;
1784 struct list_head *e;
1785 if (unlikely(ep == NULL))
1787 list_for_each(e, &ep->urb_list) {
1788 urbl = container_of(e, struct oz_urb_link, link);
1789 if (urbl->urb == urb) {
1791 if (usb_pipeisoc(urb->pipe)) {
1792 ep->credit -= urb->number_of_packets;
1801 /*------------------------------------------------------------------------------
1802 * Called to dequeue a previously submitted urb for the device.
1805 static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1807 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1808 struct oz_urb_link *urbl = NULL;
1810 unsigned long irq_state;
1811 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_dequeue(%p)\n", jiffies, urb);
1812 urbl = oz_alloc_urb_link();
1813 if (unlikely(urbl == NULL))
1815 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1816 /* The following function checks the urb is still in the queue
1817 * maintained by the core and that the unlinked field is zero.
1818 * If both are true the function sets the unlinked field and returns
1819 * zero. Otherwise it returns an error.
1821 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1822 /* We have to check we haven't completed the urb or are about
1823 * to complete it. When we do we set hcpriv to 0 so if this has
1824 * already happened we don't put the urb in the cancel queue.
1826 if ((rc == 0) && urb->hcpriv) {
1828 urbl->port = (struct oz_port *)urb->hcpriv;
1829 urbl->ep_num = usb_pipeendpoint(urb->pipe);
1830 if (usb_pipein(urb->pipe))
1831 urbl->ep_num |= USB_DIR_IN;
1832 list_add_tail(&urbl->link, &ozhcd->urb_cancel_list);
1833 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1834 tasklet_schedule(&g_urb_cancel_tasklet);
1836 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1837 oz_free_urb_link(urbl);
1841 /*------------------------------------------------------------------------------
1844 static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
1845 struct usb_host_endpoint *ep)
1847 oz_trace("oz_hcd_endpoint_disable\n");
1849 /*------------------------------------------------------------------------------
1852 static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
1853 struct usb_host_endpoint *ep)
1855 oz_trace("oz_hcd_endpoint_reset\n");
1857 /*------------------------------------------------------------------------------
1860 static int oz_hcd_get_frame_number(struct usb_hcd *hcd)
1862 oz_trace("oz_hcd_get_frame_number\n");
1863 return oz_usb_get_frame_number();
1865 /*------------------------------------------------------------------------------
1867 * This is called as a consquence of us calling usb_hcd_poll_rh_status() and we
1868 * always do that in softirq context.
1870 static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
1872 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1875 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_status_data()\n");
1878 spin_lock_bh(&ozhcd->hcd_lock);
1879 for (i = 0; i < OZ_NB_PORTS; i++) {
1880 if (ozhcd->ports[i].flags & OZ_PORT_F_CHANGED) {
1881 oz_trace2(OZ_TRACE_HUB, "Port %d changed\n", i);
1882 ozhcd->ports[i].flags &= ~OZ_PORT_F_CHANGED;
1886 spin_unlock_bh(&ozhcd->hcd_lock);
1887 return buf[0] ? 1 : 0;
1889 /*------------------------------------------------------------------------------
1892 static void oz_get_hub_descriptor(struct usb_hcd *hcd,
1893 struct usb_hub_descriptor *desc)
1895 oz_trace2(OZ_TRACE_HUB, "GetHubDescriptor\n");
1896 memset(desc, 0, sizeof(*desc));
1897 desc->bDescriptorType = 0x29;
1898 desc->bDescLength = 9;
1899 desc->wHubCharacteristics = (__force __u16)
1900 __constant_cpu_to_le16(0x0001);
1901 desc->bNbrPorts = OZ_NB_PORTS;
1903 /*------------------------------------------------------------------------------
1906 static int oz_set_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
1908 struct oz_port *port;
1910 u8 port_id = (u8)windex;
1911 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1912 unsigned set_bits = 0;
1913 unsigned clear_bits = 0;
1914 oz_trace2(OZ_TRACE_HUB, "SetPortFeature\n");
1915 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
1917 port = &ozhcd->ports[port_id-1];
1919 case USB_PORT_FEAT_CONNECTION:
1920 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
1922 case USB_PORT_FEAT_ENABLE:
1923 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
1925 case USB_PORT_FEAT_SUSPEND:
1926 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
1928 case USB_PORT_FEAT_OVER_CURRENT:
1929 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
1931 case USB_PORT_FEAT_RESET:
1932 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
1933 set_bits = USB_PORT_STAT_ENABLE | (USB_PORT_STAT_C_RESET<<16);
1934 clear_bits = USB_PORT_STAT_RESET;
1935 ozhcd->ports[port_id-1].bus_addr = 0;
1937 case USB_PORT_FEAT_POWER:
1938 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
1939 set_bits |= USB_PORT_STAT_POWER;
1941 case USB_PORT_FEAT_LOWSPEED:
1942 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
1944 case USB_PORT_FEAT_C_CONNECTION:
1945 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
1947 case USB_PORT_FEAT_C_ENABLE:
1948 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
1950 case USB_PORT_FEAT_C_SUSPEND:
1951 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
1953 case USB_PORT_FEAT_C_OVER_CURRENT:
1954 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
1956 case USB_PORT_FEAT_C_RESET:
1957 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
1959 case USB_PORT_FEAT_TEST:
1960 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
1962 case USB_PORT_FEAT_INDICATOR:
1963 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
1966 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
1969 if (set_bits || clear_bits) {
1970 spin_lock_bh(&port->port_lock);
1971 port->status &= ~clear_bits;
1972 port->status |= set_bits;
1973 spin_unlock_bh(&port->port_lock);
1975 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
1979 /*------------------------------------------------------------------------------
1982 static int oz_clear_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
1984 struct oz_port *port;
1986 u8 port_id = (u8)windex;
1987 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1988 unsigned clear_bits = 0;
1989 oz_trace2(OZ_TRACE_HUB, "ClearPortFeature\n");
1990 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
1992 port = &ozhcd->ports[port_id-1];
1994 case USB_PORT_FEAT_CONNECTION:
1995 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
1997 case USB_PORT_FEAT_ENABLE:
1998 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
1999 clear_bits = USB_PORT_STAT_ENABLE;
2001 case USB_PORT_FEAT_SUSPEND:
2002 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
2004 case USB_PORT_FEAT_OVER_CURRENT:
2005 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
2007 case USB_PORT_FEAT_RESET:
2008 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
2010 case USB_PORT_FEAT_POWER:
2011 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
2012 clear_bits |= USB_PORT_STAT_POWER;
2014 case USB_PORT_FEAT_LOWSPEED:
2015 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
2017 case USB_PORT_FEAT_C_CONNECTION:
2018 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
2019 clear_bits = (USB_PORT_STAT_C_CONNECTION << 16);
2021 case USB_PORT_FEAT_C_ENABLE:
2022 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
2023 clear_bits = (USB_PORT_STAT_C_ENABLE << 16);
2025 case USB_PORT_FEAT_C_SUSPEND:
2026 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
2028 case USB_PORT_FEAT_C_OVER_CURRENT:
2029 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
2031 case USB_PORT_FEAT_C_RESET:
2032 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
2033 clear_bits = (USB_PORT_FEAT_C_RESET << 16);
2035 case USB_PORT_FEAT_TEST:
2036 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
2038 case USB_PORT_FEAT_INDICATOR:
2039 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
2042 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
2046 spin_lock_bh(&port->port_lock);
2047 port->status &= ~clear_bits;
2048 spin_unlock_bh(&port->port_lock);
2050 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
2051 ozhcd->ports[port_id-1].status);
2054 /*------------------------------------------------------------------------------
2057 static int oz_get_port_status(struct usb_hcd *hcd, u16 windex, char *buf)
2059 struct oz_hcd *ozhcd;
2061 if ((windex < 1) || (windex > OZ_NB_PORTS))
2063 ozhcd = oz_hcd_private(hcd);
2064 oz_trace2(OZ_TRACE_HUB, "GetPortStatus windex = %d\n", windex);
2065 status = ozhcd->ports[windex-1].status;
2066 put_unaligned(cpu_to_le32(status), (__le32 *)buf);
2067 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = %x\n", windex, status);
2070 /*------------------------------------------------------------------------------
2073 static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
2074 u16 windex, char *buf, u16 wlength)
2077 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_control()\n");
2079 case ClearHubFeature:
2080 oz_trace2(OZ_TRACE_HUB, "ClearHubFeature: %d\n", req_type);
2082 case ClearPortFeature:
2083 err = oz_clear_port_feature(hcd, wvalue, windex);
2085 case GetHubDescriptor:
2086 oz_get_hub_descriptor(hcd, (struct usb_hub_descriptor *)buf);
2089 oz_trace2(OZ_TRACE_HUB, "GetHubStatus: req_type = 0x%x\n",
2091 put_unaligned(__constant_cpu_to_le32(0), (__le32 *)buf);
2094 err = oz_get_port_status(hcd, windex, buf);
2097 oz_trace2(OZ_TRACE_HUB, "SetHubFeature: %d\n", req_type);
2099 case SetPortFeature:
2100 err = oz_set_port_feature(hcd, wvalue, windex);
2103 oz_trace2(OZ_TRACE_HUB, "Other: %d\n", req_type);
2108 /*------------------------------------------------------------------------------
2111 static int oz_hcd_bus_suspend(struct usb_hcd *hcd)
2113 struct oz_hcd *ozhcd;
2114 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_suspend()\n");
2115 ozhcd = oz_hcd_private(hcd);
2116 spin_lock_bh(&ozhcd->hcd_lock);
2117 hcd->state = HC_STATE_SUSPENDED;
2118 ozhcd->flags |= OZ_HDC_F_SUSPENDED;
2119 spin_unlock_bh(&ozhcd->hcd_lock);
2122 /*------------------------------------------------------------------------------
2125 static int oz_hcd_bus_resume(struct usb_hcd *hcd)
2127 struct oz_hcd *ozhcd;
2128 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_resume()\n");
2129 ozhcd = oz_hcd_private(hcd);
2130 spin_lock_bh(&ozhcd->hcd_lock);
2131 ozhcd->flags &= ~OZ_HDC_F_SUSPENDED;
2132 hcd->state = HC_STATE_RUNNING;
2133 spin_unlock_bh(&ozhcd->hcd_lock);
2136 /*------------------------------------------------------------------------------
2138 static void oz_plat_shutdown(struct platform_device *dev)
2140 oz_trace("oz_plat_shutdown()\n");
2142 /*------------------------------------------------------------------------------
2145 static int oz_plat_probe(struct platform_device *dev)
2149 struct usb_hcd *hcd;
2150 struct oz_hcd *ozhcd;
2151 oz_trace("oz_plat_probe()\n");
2152 hcd = usb_create_hcd(&g_oz_hc_drv, &dev->dev, dev_name(&dev->dev));
2154 oz_trace("Failed to created hcd object OK\n");
2157 ozhcd = oz_hcd_private(hcd);
2158 memset(ozhcd, 0, sizeof(*ozhcd));
2159 INIT_LIST_HEAD(&ozhcd->urb_pending_list);
2160 INIT_LIST_HEAD(&ozhcd->urb_cancel_list);
2161 INIT_LIST_HEAD(&ozhcd->orphanage);
2163 ozhcd->conn_port = -1;
2164 spin_lock_init(&ozhcd->hcd_lock);
2165 for (i = 0; i < OZ_NB_PORTS; i++) {
2166 struct oz_port *port = &ozhcd->ports[i];
2167 port->ozhcd = ozhcd;
2170 port->bus_addr = 0xff;
2171 spin_lock_init(&port->port_lock);
2173 err = usb_add_hcd(hcd, 0, 0);
2175 oz_trace("Failed to add hcd object OK\n");
2179 spin_lock_bh(&g_hcdlock);
2181 spin_unlock_bh(&g_hcdlock);
2184 /*------------------------------------------------------------------------------
2187 static int oz_plat_remove(struct platform_device *dev)
2189 struct usb_hcd *hcd = platform_get_drvdata(dev);
2190 struct oz_hcd *ozhcd;
2191 oz_trace("oz_plat_remove()\n");
2194 ozhcd = oz_hcd_private(hcd);
2195 spin_lock_bh(&g_hcdlock);
2196 if (ozhcd == g_ozhcd)
2198 spin_unlock_bh(&g_hcdlock);
2199 oz_trace("Clearing orphanage\n");
2200 oz_hcd_clear_orphanage(ozhcd, -EPIPE);
2201 oz_trace("Removing hcd\n");
2202 usb_remove_hcd(hcd);
2204 oz_empty_link_pool();
2207 /*------------------------------------------------------------------------------
2210 static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg)
2212 oz_trace("oz_plat_suspend()\n");
2215 /*------------------------------------------------------------------------------
2218 static int oz_plat_resume(struct platform_device *dev)
2220 oz_trace("oz_plat_resume()\n");
2223 /*------------------------------------------------------------------------------
2226 int oz_hcd_init(void)
2231 tasklet_init(&g_urb_process_tasklet, oz_urb_process_tasklet, 0);
2232 tasklet_init(&g_urb_cancel_tasklet, oz_urb_cancel_tasklet, 0);
2233 err = platform_driver_register(&g_oz_plat_drv);
2234 oz_trace("platform_driver_register() returned %d\n", err);
2237 g_plat_dev = platform_device_alloc(OZ_PLAT_DEV_NAME, -1);
2238 if (g_plat_dev == NULL) {
2242 oz_trace("platform_device_alloc() succeeded\n");
2243 err = platform_device_add(g_plat_dev);
2246 oz_trace("platform_device_add() succeeded\n");
2249 platform_device_put(g_plat_dev);
2251 platform_driver_unregister(&g_oz_plat_drv);
2253 tasklet_disable(&g_urb_process_tasklet);
2254 tasklet_disable(&g_urb_cancel_tasklet);
2255 oz_trace("oz_hcd_init() failed %d\n", err);
2258 /*------------------------------------------------------------------------------
2261 void oz_hcd_term(void)
2263 tasklet_kill(&g_urb_process_tasklet);
2264 tasklet_kill(&g_urb_cancel_tasklet);
2265 platform_device_unregister(g_plat_dev);
2266 platform_driver_unregister(&g_oz_plat_drv);
2267 oz_trace("Pending urbs:%d\n", atomic_read(&g_pending_urbs));