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"
40 /*------------------------------------------------------------------------------
41 * Number of units of buffering to capture for an isochronous IN endpoint before
42 * allowing data to be indicated up.
44 #define OZ_IN_BUFFERING_UNITS 50
45 /* Name of our platform device.
47 #define OZ_PLAT_DEV_NAME "ozwpan"
48 /* Maximum number of free urb links that can be kept in the pool.
50 #define OZ_MAX_LINK_POOL_SIZE 16
51 /* Get endpoint object from the containing link.
53 #define ep_from_link(__e) container_of((__e), struct oz_endpoint, link)
54 /*------------------------------------------------------------------------------
55 * Used to link urbs together and also store some status information for each
57 * A cache of these are kept in a pool to reduce number of calls to kmalloc.
60 struct list_head link;
65 unsigned long submit_jiffies;
68 /* Holds state information about a USB endpoint.
71 struct list_head urb_list; /* List of oz_urb_link items. */
72 struct list_head link; /* For isoc ep, links in to isoc
74 unsigned long last_jiffies;
87 /* Bits in the flags field. */
88 #define OZ_F_EP_BUFFERING 0x1
89 #define OZ_F_EP_HAVE_STREAM 0x2
91 /* Holds state information about a USB interface.
98 /* Holds state information about an hcd port.
100 #define OZ_NB_ENDPOINTS 16
105 struct oz_hcd *ozhcd;
106 spinlock_t port_lock;
111 struct oz_interface *iface;
112 struct oz_endpoint *out_ep[OZ_NB_ENDPOINTS];
113 struct oz_endpoint *in_ep[OZ_NB_ENDPOINTS];
114 struct list_head isoc_out_ep;
115 struct list_head isoc_in_ep;
117 #define OZ_PORT_F_PRESENT 0x1
118 #define OZ_PORT_F_CHANGED 0x2
119 #define OZ_PORT_F_DYING 0x4
121 /* Data structure in the private context area of struct usb_hcd.
123 #define OZ_NB_PORTS 8
126 struct list_head urb_pending_list;
127 struct list_head urb_cancel_list;
128 struct list_head orphanage;
129 int conn_port; /* Port that is currently connecting, -1 if none.*/
130 struct oz_port ports[OZ_NB_PORTS];
134 /* Bits in flags field.
136 #define OZ_HDC_F_SUSPENDED 0x1
138 /*------------------------------------------------------------------------------
139 * Static function prototypes.
141 static int oz_hcd_start(struct usb_hcd *hcd);
142 static void oz_hcd_stop(struct usb_hcd *hcd);
143 static void oz_hcd_shutdown(struct usb_hcd *hcd);
144 static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
146 static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
147 static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
148 struct usb_host_endpoint *ep);
149 static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
150 struct usb_host_endpoint *ep);
151 static int oz_hcd_get_frame_number(struct usb_hcd *hcd);
152 static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf);
153 static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
154 u16 windex, char *buf, u16 wlength);
155 static int oz_hcd_bus_suspend(struct usb_hcd *hcd);
156 static int oz_hcd_bus_resume(struct usb_hcd *hcd);
157 static int oz_plat_probe(struct platform_device *dev);
158 static int oz_plat_remove(struct platform_device *dev);
159 static void oz_plat_shutdown(struct platform_device *dev);
160 static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg);
161 static int oz_plat_resume(struct platform_device *dev);
162 static void oz_urb_process_tasklet(unsigned long unused);
163 static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
164 struct oz_port *port, struct usb_host_config *config,
166 static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
167 struct oz_port *port);
168 static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
169 struct oz_port *port,
170 struct usb_host_interface *intf, gfp_t mem_flags);
171 static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
172 struct oz_port *port, int if_ix);
173 static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
175 static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
177 static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status);
178 /*------------------------------------------------------------------------------
179 * Static external variables.
181 static struct platform_device *g_plat_dev;
182 static struct oz_hcd *g_ozhcd;
183 static DEFINE_SPINLOCK(g_hcdlock); /* Guards g_ozhcd. */
184 static const char g_hcd_name[] = "Ozmo WPAN";
185 static struct list_head *g_link_pool;
186 static int g_link_pool_size;
187 static DEFINE_SPINLOCK(g_link_lock);
188 static DEFINE_SPINLOCK(g_tasklet_lock);
189 static struct tasklet_struct g_urb_process_tasklet;
190 static struct tasklet_struct g_urb_cancel_tasklet;
191 static atomic_t g_pending_urbs = ATOMIC_INIT(0);
192 static const struct hc_driver g_oz_hc_drv = {
193 .description = g_hcd_name,
194 .product_desc = "Ozmo Devices WPAN",
195 .hcd_priv_size = sizeof(struct oz_hcd),
197 .start = oz_hcd_start,
199 .shutdown = oz_hcd_shutdown,
200 .urb_enqueue = oz_hcd_urb_enqueue,
201 .urb_dequeue = oz_hcd_urb_dequeue,
202 .endpoint_disable = oz_hcd_endpoint_disable,
203 .endpoint_reset = oz_hcd_endpoint_reset,
204 .get_frame_number = oz_hcd_get_frame_number,
205 .hub_status_data = oz_hcd_hub_status_data,
206 .hub_control = oz_hcd_hub_control,
207 .bus_suspend = oz_hcd_bus_suspend,
208 .bus_resume = oz_hcd_bus_resume,
211 static struct platform_driver g_oz_plat_drv = {
212 .probe = oz_plat_probe,
213 .remove = oz_plat_remove,
214 .shutdown = oz_plat_shutdown,
215 .suspend = oz_plat_suspend,
216 .resume = oz_plat_resume,
218 .name = OZ_PLAT_DEV_NAME,
219 .owner = THIS_MODULE,
222 /*------------------------------------------------------------------------------
223 * Gets our private context area (which is of type struct oz_hcd) from the
227 static inline struct oz_hcd *oz_hcd_private(struct usb_hcd *hcd)
229 return (struct oz_hcd *)hcd->hcd_priv;
231 /*------------------------------------------------------------------------------
232 * Searches list of ports to find the index of the one with a specified USB
233 * bus address. If none of the ports has the bus address then the connection
234 * port is returned, if there is one or -1 otherwise.
237 static int oz_get_port_from_addr(struct oz_hcd *ozhcd, u8 bus_addr)
240 for (i = 0; i < OZ_NB_PORTS; i++) {
241 if (ozhcd->ports[i].bus_addr == bus_addr)
244 return ozhcd->conn_port;
246 /*------------------------------------------------------------------------------
247 * Allocates an urb link, first trying the pool but going to heap if empty.
250 static struct oz_urb_link *oz_alloc_urb_link(void)
252 struct oz_urb_link *urbl = NULL;
253 unsigned long irq_state;
254 spin_lock_irqsave(&g_link_lock, irq_state);
256 urbl = container_of(g_link_pool, struct oz_urb_link, link);
257 g_link_pool = urbl->link.next;
260 spin_unlock_irqrestore(&g_link_lock, irq_state);
262 urbl = kmalloc(sizeof(struct oz_urb_link), GFP_ATOMIC);
265 /*------------------------------------------------------------------------------
266 * Frees an urb link by putting it in the pool if there is enough space or
267 * deallocating it to heap otherwise.
270 static void oz_free_urb_link(struct oz_urb_link *urbl)
273 unsigned long irq_state;
274 spin_lock_irqsave(&g_link_lock, irq_state);
275 if (g_link_pool_size < OZ_MAX_LINK_POOL_SIZE) {
276 urbl->link.next = g_link_pool;
277 g_link_pool = &urbl->link;
281 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 static 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 = NULL;
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 void oz_complete_buffered_urb(struct oz_port *port,
421 struct oz_endpoint *ep,
424 u8 data_len, available_space, copy_len;
426 memcpy(&data_len, &ep->buffer[ep->out_ix], sizeof(u8));
427 if (data_len <= urb->transfer_buffer_length)
428 available_space = data_len;
430 available_space = urb->transfer_buffer_length;
432 if (++ep->out_ix == ep->buffer_size)
434 copy_len = ep->buffer_size - ep->out_ix;
435 if (copy_len >= available_space)
436 copy_len = available_space;
437 memcpy(urb->transfer_buffer, &ep->buffer[ep->out_ix], copy_len);
439 if (copy_len < available_space) {
440 memcpy((urb->transfer_buffer + copy_len), ep->buffer,
441 (available_space - copy_len));
442 ep->out_ix = available_space - copy_len;
444 ep->out_ix += copy_len;
446 urb->actual_length = available_space;
447 if (ep->out_ix == ep->buffer_size)
450 ep->buffered_units--;
451 oz_trace("Trying to give back buffered frame of size=%d\n",
453 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
456 /*------------------------------------------------------------------------------
459 static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
460 struct urb *urb, u8 req_id)
462 struct oz_urb_link *urbl;
463 struct oz_endpoint *ep;
465 if (ep_addr >= OZ_NB_ENDPOINTS) {
466 oz_trace("Invalid endpoint number in oz_enqueue_ep_urb().\n");
469 urbl = oz_alloc_urb_link();
472 urbl->submit_jiffies = jiffies;
474 urbl->req_id = req_id;
475 urbl->ep_num = ep_addr;
476 /* Hold lock while we insert the URB into the list within the
477 * endpoint structure.
479 spin_lock_bh(&port->ozhcd->hcd_lock);
480 /* If the urb has been unlinked while out of any list then
484 spin_unlock_bh(&port->ozhcd->hcd_lock);
485 oz_trace("urb %p unlinked so complete immediately\n", urb);
486 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
487 oz_free_urb_link(urbl);
491 ep = port->in_ep[ep_addr];
493 ep = port->out_ep[ep_addr];
495 /*For interrupt endpoint check for buffered data
498 if (((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)
499 && ep->buffered_units > 0) {
500 oz_free_urb_link(urbl);
501 spin_unlock_bh(&port->ozhcd->hcd_lock);
502 oz_complete_buffered_urb(port, ep, urb);
506 if (ep && port->hpd) {
507 list_add_tail(&urbl->link, &ep->urb_list);
508 if (!in_dir && ep_addr && (ep->credit < 0)) {
509 ep->last_jiffies = jiffies;
511 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num,
512 0, NULL, ep->credit);
517 spin_unlock_bh(&port->ozhcd->hcd_lock);
519 oz_free_urb_link(urbl);
522 /*------------------------------------------------------------------------------
523 * Removes an urb from the queue in the endpoint.
524 * Returns 0 if it is found and -EIDRM otherwise.
527 static int oz_dequeue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir,
530 struct oz_urb_link *urbl = NULL;
531 struct oz_endpoint *ep;
532 spin_lock_bh(&port->ozhcd->hcd_lock);
534 ep = port->in_ep[ep_addr];
536 ep = port->out_ep[ep_addr];
539 list_for_each(e, &ep->urb_list) {
540 urbl = container_of(e, struct oz_urb_link, link);
541 if (urbl->urb == urb) {
548 spin_unlock_bh(&port->ozhcd->hcd_lock);
550 oz_free_urb_link(urbl);
551 return urbl ? 0 : -EIDRM;
553 /*------------------------------------------------------------------------------
554 * Finds an urb given its request id.
557 static struct urb *oz_find_urb_by_id(struct oz_port *port, int ep_ix,
560 struct oz_hcd *ozhcd = port->ozhcd;
561 struct urb *urb = NULL;
562 struct oz_urb_link *urbl = NULL;
563 struct oz_endpoint *ep;
565 spin_lock_bh(&ozhcd->hcd_lock);
566 ep = port->out_ep[ep_ix];
569 list_for_each(e, &ep->urb_list) {
570 urbl = container_of(e, struct oz_urb_link, link);
571 if (urbl->req_id == req_id) {
578 spin_unlock_bh(&ozhcd->hcd_lock);
579 /* If urb is non-zero then we we must have an urb link to delete.
582 oz_free_urb_link(urbl);
585 /*------------------------------------------------------------------------------
586 * Pre-condition: Port lock must be held.
589 static void oz_acquire_port(struct oz_port *port, void *hpd)
591 INIT_LIST_HEAD(&port->isoc_out_ep);
592 INIT_LIST_HEAD(&port->isoc_in_ep);
593 port->flags |= OZ_PORT_F_PRESENT | OZ_PORT_F_CHANGED;
594 port->status |= USB_PORT_STAT_CONNECTION |
595 (USB_PORT_STAT_C_CONNECTION << 16);
599 /*------------------------------------------------------------------------------
602 static struct oz_hcd *oz_hcd_claim(void)
604 struct oz_hcd *ozhcd;
605 spin_lock_bh(&g_hcdlock);
608 usb_get_hcd(ozhcd->hcd);
609 spin_unlock_bh(&g_hcdlock);
612 /*------------------------------------------------------------------------------
615 static inline void oz_hcd_put(struct oz_hcd *ozhcd)
618 usb_put_hcd(ozhcd->hcd);
620 /*------------------------------------------------------------------------------
621 * This is called by the protocol handler to notify that a PD has arrived.
622 * We allocate a port to associate with the PD and create a structure for
623 * endpoint 0. This port is made the connection port.
624 * In the event that one of the other port is already a connection port then
626 * TODO We should be able to do better than fail and should be able remember
627 * that this port needs configuring and make it the connection port once the
628 * current connection port has been assigned an address. Collisions here are
629 * probably very rare indeed.
632 void *oz_hcd_pd_arrived(void *hpd)
636 struct oz_hcd *ozhcd = NULL;
637 struct oz_endpoint *ep;
638 oz_trace("oz_hcd_pd_arrived()\n");
639 ozhcd = oz_hcd_claim();
642 /* Allocate an endpoint object in advance (before holding hcd lock) to
643 * use for out endpoint 0.
645 ep = oz_ep_alloc(GFP_ATOMIC, 0);
646 spin_lock_bh(&ozhcd->hcd_lock);
647 if (ozhcd->conn_port >= 0) {
648 spin_unlock_bh(&ozhcd->hcd_lock);
649 oz_trace("conn_port >= 0\n");
652 for (i = 0; i < OZ_NB_PORTS; i++) {
653 struct oz_port *port = &ozhcd->ports[i];
654 spin_lock(&port->port_lock);
655 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
656 oz_acquire_port(port, hpd);
657 spin_unlock(&port->port_lock);
660 spin_unlock(&port->port_lock);
662 if (i < OZ_NB_PORTS) {
663 oz_trace("Setting conn_port = %d\n", i);
664 ozhcd->conn_port = i;
665 /* Attach out endpoint 0.
667 ozhcd->ports[i].out_ep[0] = ep;
669 hport = &ozhcd->ports[i];
670 spin_unlock_bh(&ozhcd->hcd_lock);
671 if (ozhcd->flags & OZ_HDC_F_SUSPENDED) {
672 oz_trace("Resuming root hub\n");
673 usb_hcd_resume_root_hub(ozhcd->hcd);
675 usb_hcd_poll_rh_status(ozhcd->hcd);
677 spin_unlock_bh(&ozhcd->hcd_lock);
680 if (ep) /* ep is non-null if not used. */
681 oz_ep_free(NULL, ep);
685 /*------------------------------------------------------------------------------
686 * This is called by the protocol handler to notify that the PD has gone away.
687 * We need to deallocate all resources and then request that the root hub is
688 * polled. We release the reference we hold on the PD.
691 void oz_hcd_pd_departed(void *hport)
693 struct oz_port *port = (struct oz_port *)hport;
694 struct oz_hcd *ozhcd;
696 struct oz_endpoint *ep = NULL;
698 oz_trace("oz_hcd_pd_departed()\n");
700 oz_trace("oz_hcd_pd_departed() port = 0\n");
706 /* Check if this is the connection port - if so clear it.
708 spin_lock_bh(&ozhcd->hcd_lock);
709 if ((ozhcd->conn_port >= 0) &&
710 (port == &ozhcd->ports[ozhcd->conn_port])) {
711 oz_trace("Clearing conn_port\n");
712 ozhcd->conn_port = -1;
714 spin_lock(&port->port_lock);
715 port->flags |= OZ_PORT_F_DYING;
716 spin_unlock(&port->port_lock);
717 spin_unlock_bh(&ozhcd->hcd_lock);
719 oz_clean_endpoints_for_config(ozhcd->hcd, port);
720 spin_lock_bh(&port->port_lock);
723 port->bus_addr = 0xff;
724 port->flags &= ~(OZ_PORT_F_PRESENT | OZ_PORT_F_DYING);
725 port->flags |= OZ_PORT_F_CHANGED;
726 port->status &= ~USB_PORT_STAT_CONNECTION;
727 port->status |= (USB_PORT_STAT_C_CONNECTION << 16);
728 /* If there is an endpont 0 then clear the pointer while we hold
729 * the spinlock be we deallocate it after releasing the lock.
731 if (port->out_ep[0]) {
732 ep = port->out_ep[0];
733 port->out_ep[0] = NULL;
735 spin_unlock_bh(&port->port_lock);
737 oz_ep_free(port, ep);
738 usb_hcd_poll_rh_status(ozhcd->hcd);
741 /*------------------------------------------------------------------------------
744 void oz_hcd_pd_reset(void *hpd, void *hport)
746 /* Cleanup the current configuration and report reset to the core.
748 struct oz_port *port = (struct oz_port *)hport;
749 struct oz_hcd *ozhcd = port->ozhcd;
750 oz_trace("PD Reset\n");
751 spin_lock_bh(&port->port_lock);
752 port->flags |= OZ_PORT_F_CHANGED;
753 port->status |= USB_PORT_STAT_RESET;
754 port->status |= (USB_PORT_STAT_C_RESET << 16);
755 spin_unlock_bh(&port->port_lock);
756 oz_clean_endpoints_for_config(ozhcd->hcd, port);
757 usb_hcd_poll_rh_status(ozhcd->hcd);
759 /*------------------------------------------------------------------------------
762 void oz_hcd_get_desc_cnf(void *hport, u8 req_id, int status, const u8 *desc,
763 int length, int offset, int total_size)
765 struct oz_port *port = (struct oz_port *)hport;
769 oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, NULL, status);
770 oz_trace("oz_hcd_get_desc_cnf length = %d offs = %d tot_size = %d\n",
771 length, offset, total_size);
772 urb = oz_find_urb_by_id(port, 0, req_id);
777 int required_size = urb->transfer_buffer_length;
778 if (required_size > total_size)
779 required_size = total_size;
780 copy_len = required_size-offset;
781 if (length <= copy_len)
783 memcpy(urb->transfer_buffer+offset, desc, copy_len);
785 if (offset < required_size) {
786 struct usb_ctrlrequest *setup =
787 (struct usb_ctrlrequest *)urb->setup_packet;
788 unsigned wvalue = le16_to_cpu(setup->wValue);
789 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
791 else if (oz_usb_get_desc_req(port->hpd, req_id,
792 setup->bRequestType, (u8)(wvalue>>8),
793 (u8)wvalue, setup->wIndex, offset,
794 required_size-offset)) {
795 oz_dequeue_ep_urb(port, 0, 0, urb);
802 urb->actual_length = total_size;
803 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
805 /*------------------------------------------------------------------------------
809 static void oz_display_conf_type(u8 t)
812 case USB_REQ_GET_STATUS:
813 oz_trace("USB_REQ_GET_STATUS - cnf\n");
815 case USB_REQ_CLEAR_FEATURE:
816 oz_trace("USB_REQ_CLEAR_FEATURE - cnf\n");
818 case USB_REQ_SET_FEATURE:
819 oz_trace("USB_REQ_SET_FEATURE - cnf\n");
821 case USB_REQ_SET_ADDRESS:
822 oz_trace("USB_REQ_SET_ADDRESS - cnf\n");
824 case USB_REQ_GET_DESCRIPTOR:
825 oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n");
827 case USB_REQ_SET_DESCRIPTOR:
828 oz_trace("USB_REQ_SET_DESCRIPTOR - cnf\n");
830 case USB_REQ_GET_CONFIGURATION:
831 oz_trace("USB_REQ_GET_CONFIGURATION - cnf\n");
833 case USB_REQ_SET_CONFIGURATION:
834 oz_trace("USB_REQ_SET_CONFIGURATION - cnf\n");
836 case USB_REQ_GET_INTERFACE:
837 oz_trace("USB_REQ_GET_INTERFACE - cnf\n");
839 case USB_REQ_SET_INTERFACE:
840 oz_trace("USB_REQ_SET_INTERFACE - cnf\n");
842 case USB_REQ_SYNCH_FRAME:
843 oz_trace("USB_REQ_SYNCH_FRAME - cnf\n");
848 #define oz_display_conf_type(__x)
849 #endif /* WANT_TRACE */
850 /*------------------------------------------------------------------------------
853 static void oz_hcd_complete_set_config(struct oz_port *port, struct urb *urb,
854 u8 rcode, u8 config_num)
857 struct usb_hcd *hcd = port->ozhcd->hcd;
859 port->config_num = config_num;
860 oz_clean_endpoints_for_config(hcd, port);
861 if (oz_build_endpoints_for_config(hcd, port,
862 &urb->dev->config[port->config_num-1], GFP_ATOMIC)) {
868 oz_complete_urb(hcd, urb, rc, 0);
870 /*------------------------------------------------------------------------------
873 static void oz_hcd_complete_set_interface(struct oz_port *port, struct urb *urb,
874 u8 rcode, u8 if_num, u8 alt)
876 struct usb_hcd *hcd = port->ozhcd->hcd;
879 struct usb_host_config *config;
880 struct usb_host_interface *intf;
881 oz_trace("Set interface %d alt %d\n", if_num, alt);
882 oz_clean_endpoints_for_interface(hcd, port, if_num);
883 config = &urb->dev->config[port->config_num-1];
884 intf = &config->intf_cache[if_num]->altsetting[alt];
885 if (oz_build_endpoints_for_interface(hcd, port, intf,
889 port->iface[if_num].alt = alt;
893 oz_complete_urb(hcd, urb, rc, 0);
895 /*------------------------------------------------------------------------------
898 void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, const u8 *data,
901 struct oz_port *port = (struct oz_port *)hport;
903 struct usb_ctrlrequest *setup;
904 struct usb_hcd *hcd = port->ozhcd->hcd;
908 oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, NULL, rcode);
909 oz_trace("oz_hcd_control_cnf rcode=%u len=%d\n", rcode, data_len);
910 urb = oz_find_urb_by_id(port, 0, req_id);
912 oz_trace("URB not found\n");
915 setup = (struct usb_ctrlrequest *)urb->setup_packet;
916 windex = le16_to_cpu(setup->wIndex);
917 wvalue = le16_to_cpu(setup->wValue);
918 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
919 /* Standard requests */
920 oz_display_conf_type(setup->bRequest);
921 switch (setup->bRequest) {
922 case USB_REQ_SET_CONFIGURATION:
923 oz_hcd_complete_set_config(port, urb, rcode,
926 case USB_REQ_SET_INTERFACE:
927 oz_hcd_complete_set_interface(port, urb, rcode,
928 (u8)windex, (u8)wvalue);
931 oz_complete_urb(hcd, urb, 0, 0);
936 oz_trace("VENDOR-CLASS - cnf\n");
938 if (data_len <= urb->transfer_buffer_length)
941 copy_len = urb->transfer_buffer_length;
942 memcpy(urb->transfer_buffer, data, copy_len);
943 urb->actual_length = copy_len;
945 oz_complete_urb(hcd, urb, 0, 0);
948 /*------------------------------------------------------------------------------
949 * Context: softirq-serialized
951 static int oz_hcd_buffer_data(struct oz_endpoint *ep, const u8 *data,
958 space = ep->out_ix-ep->in_ix-1;
960 space += ep->buffer_size;
961 if (space < (data_len+1)) {
962 oz_trace("Buffer full\n");
965 ep->buffer[ep->in_ix] = (u8)data_len;
966 if (++ep->in_ix == ep->buffer_size)
968 copy_len = ep->buffer_size - ep->in_ix;
969 if (copy_len > data_len)
971 memcpy(&ep->buffer[ep->in_ix], data, copy_len);
973 if (copy_len < data_len) {
974 memcpy(ep->buffer, data+copy_len, data_len-copy_len);
975 ep->in_ix = data_len-copy_len;
977 ep->in_ix += copy_len;
979 if (ep->in_ix == ep->buffer_size)
981 ep->buffered_units++;
984 /*------------------------------------------------------------------------------
985 * Context: softirq-serialized
987 void oz_hcd_data_ind(void *hport, u8 endpoint, const u8 *data, int data_len)
989 struct oz_port *port = (struct oz_port *)hport;
990 struct oz_endpoint *ep;
991 struct oz_hcd *ozhcd = port->ozhcd;
992 spin_lock_bh(&ozhcd->hcd_lock);
993 ep = port->in_ep[endpoint & USB_ENDPOINT_NUMBER_MASK];
996 switch (ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) {
997 case USB_ENDPOINT_XFER_INT:
998 case USB_ENDPOINT_XFER_BULK:
999 if (!list_empty(&ep->urb_list)) {
1000 struct oz_urb_link *urbl =
1001 list_first_entry(&ep->urb_list,
1002 struct oz_urb_link, link);
1005 list_del_init(&urbl->link);
1006 spin_unlock_bh(&ozhcd->hcd_lock);
1008 oz_free_urb_link(urbl);
1009 if (data_len <= urb->transfer_buffer_length)
1010 copy_len = data_len;
1012 copy_len = urb->transfer_buffer_length;
1013 memcpy(urb->transfer_buffer, data, copy_len);
1014 urb->actual_length = copy_len;
1015 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
1018 oz_trace("buffering frame as URB is not available\n");
1019 oz_hcd_buffer_data(ep, data, data_len);
1022 case USB_ENDPOINT_XFER_ISOC:
1023 oz_hcd_buffer_data(ep, data, data_len);
1027 spin_unlock_bh(&ozhcd->hcd_lock);
1029 /*------------------------------------------------------------------------------
1032 static inline int oz_usb_get_frame_number(void)
1034 return jiffies_to_msecs(get_jiffies_64());
1036 /*------------------------------------------------------------------------------
1039 int oz_hcd_heartbeat(void *hport)
1042 struct oz_port *port = (struct oz_port *)hport;
1043 struct oz_hcd *ozhcd = port->ozhcd;
1044 struct oz_urb_link *urbl;
1045 struct list_head xfr_list;
1046 struct list_head *e;
1047 struct list_head *n;
1049 struct oz_endpoint *ep;
1050 unsigned long now = jiffies;
1051 INIT_LIST_HEAD(&xfr_list);
1052 /* Check the OUT isoc endpoints to see if any URB data can be sent.
1054 spin_lock_bh(&ozhcd->hcd_lock);
1055 list_for_each(e, &port->isoc_out_ep) {
1056 ep = ep_from_link(e);
1059 ep->credit += jiffies_to_msecs(now - ep->last_jiffies);
1060 if (ep->credit > ep->credit_ceiling)
1061 ep->credit = ep->credit_ceiling;
1062 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, NULL,
1064 ep->last_jiffies = now;
1065 while (ep->credit && !list_empty(&ep->urb_list)) {
1066 urbl = list_first_entry(&ep->urb_list,
1067 struct oz_urb_link, link);
1069 if ((ep->credit + 1) < urb->number_of_packets)
1071 ep->credit -= urb->number_of_packets;
1072 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, NULL,
1074 list_move_tail(&urbl->link, &xfr_list);
1077 spin_unlock_bh(&ozhcd->hcd_lock);
1078 /* Send to PD and complete URBs.
1080 list_for_each_safe(e, n, &xfr_list) {
1082 urbl = container_of(e, struct oz_urb_link, link);
1084 t = urbl->submit_jiffies;
1086 urb->error_count = 0;
1087 urb->start_frame = oz_usb_get_frame_number();
1088 oz_usb_send_isoc(port->hpd, urbl->ep_num, urb);
1089 oz_free_urb_link(urbl);
1090 oz_complete_urb(port->ozhcd->hcd, urb, 0, t);
1092 /* Check the IN isoc endpoints to see if any URBs can be completed.
1094 spin_lock_bh(&ozhcd->hcd_lock);
1095 list_for_each(e, &port->isoc_in_ep) {
1096 struct oz_endpoint *ep = ep_from_link(e);
1097 if (ep->flags & OZ_F_EP_BUFFERING) {
1098 if (ep->buffered_units >= OZ_IN_BUFFERING_UNITS) {
1099 ep->flags &= ~OZ_F_EP_BUFFERING;
1101 oz_event_log(OZ_EVT_EP_CREDIT,
1102 ep->ep_num | USB_DIR_IN,
1103 0, NULL, ep->credit);
1104 ep->last_jiffies = now;
1105 ep->start_frame = 0;
1106 oz_event_log(OZ_EVT_EP_BUFFERING,
1107 ep->ep_num | USB_DIR_IN, 0, NULL, 0);
1111 ep->credit += jiffies_to_msecs(now - ep->last_jiffies);
1112 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
1113 0, NULL, ep->credit);
1114 ep->last_jiffies = now;
1115 while (!list_empty(&ep->urb_list)) {
1116 struct oz_urb_link *urbl =
1117 list_first_entry(&ep->urb_list,
1118 struct oz_urb_link, link);
1119 struct urb *urb = urbl->urb;
1123 if ((ep->credit + 1) < urb->number_of_packets)
1125 if (ep->buffered_units < urb->number_of_packets)
1127 urb->actual_length = 0;
1128 for (i = 0; i < urb->number_of_packets; i++) {
1129 len = ep->buffer[ep->out_ix];
1130 if (++ep->out_ix == ep->buffer_size)
1132 copy_len = ep->buffer_size - ep->out_ix;
1135 memcpy(urb->transfer_buffer,
1136 &ep->buffer[ep->out_ix], copy_len);
1137 if (copy_len < len) {
1138 memcpy(urb->transfer_buffer+copy_len,
1139 ep->buffer, len-copy_len);
1140 ep->out_ix = len-copy_len;
1142 ep->out_ix += copy_len;
1143 if (ep->out_ix == ep->buffer_size)
1145 urb->iso_frame_desc[i].offset =
1147 urb->actual_length += len;
1148 urb->iso_frame_desc[i].actual_length = len;
1149 urb->iso_frame_desc[i].status = 0;
1151 ep->buffered_units -= urb->number_of_packets;
1152 urb->error_count = 0;
1153 urb->start_frame = ep->start_frame;
1154 ep->start_frame += urb->number_of_packets;
1155 list_move_tail(&urbl->link, &xfr_list);
1156 ep->credit -= urb->number_of_packets;
1157 oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN,
1158 0, NULL, ep->credit);
1161 if (!list_empty(&port->isoc_out_ep) || !list_empty(&port->isoc_in_ep))
1163 spin_unlock_bh(&ozhcd->hcd_lock);
1164 /* Complete the filled URBs.
1166 list_for_each_safe(e, n, &xfr_list) {
1167 urbl = container_of(e, struct oz_urb_link, link);
1170 oz_free_urb_link(urbl);
1171 oz_complete_urb(port->ozhcd->hcd, urb, 0, 0);
1173 /* Check if there are any ep0 requests that have timed out.
1174 * If so resent to PD.
1176 ep = port->out_ep[0];
1178 struct list_head *e;
1179 struct list_head *n;
1180 spin_lock_bh(&ozhcd->hcd_lock);
1181 list_for_each_safe(e, n, &ep->urb_list) {
1182 urbl = container_of(e, struct oz_urb_link, link);
1183 if (time_after(now, urbl->submit_jiffies+HZ/2)) {
1184 oz_trace("%ld: Request 0x%p timeout\n",
1186 urbl->submit_jiffies = now;
1187 list_move_tail(e, &xfr_list);
1190 if (!list_empty(&ep->urb_list))
1192 spin_unlock_bh(&ozhcd->hcd_lock);
1194 while (e != &xfr_list) {
1195 urbl = container_of(e, struct oz_urb_link, link);
1197 oz_trace("Resending request to PD.\n");
1198 oz_process_ep0_urb(ozhcd, urbl->urb, GFP_ATOMIC);
1199 oz_free_urb_link(urbl);
1204 /*------------------------------------------------------------------------------
1207 static int oz_build_endpoints_for_interface(struct usb_hcd *hcd,
1208 struct oz_port *port,
1209 struct usb_host_interface *intf, gfp_t mem_flags)
1211 struct oz_hcd *ozhcd = port->ozhcd;
1213 int if_ix = intf->desc.bInterfaceNumber;
1214 int request_heartbeat = 0;
1215 oz_trace("interface[%d] = %p\n", if_ix, intf);
1216 for (i = 0; i < intf->desc.bNumEndpoints; i++) {
1217 struct usb_host_endpoint *hep = &intf->endpoint[i];
1218 u8 ep_addr = hep->desc.bEndpointAddress;
1219 u8 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
1220 struct oz_endpoint *ep;
1221 int buffer_size = 0;
1223 oz_trace("%d bEndpointAddress = %x\n", i, ep_addr);
1224 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1225 switch (hep->desc.bmAttributes &
1226 USB_ENDPOINT_XFERTYPE_MASK) {
1227 case USB_ENDPOINT_XFER_ISOC:
1228 buffer_size = 24*1024;
1230 case USB_ENDPOINT_XFER_INT:
1236 ep = oz_ep_alloc(mem_flags, buffer_size);
1238 oz_clean_endpoints_for_interface(hcd, port, if_ix);
1241 ep->attrib = hep->desc.bmAttributes;
1242 ep->ep_num = ep_num;
1243 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1244 == USB_ENDPOINT_XFER_ISOC) {
1245 oz_trace("wMaxPacketSize = %d\n",
1246 hep->desc.wMaxPacketSize);
1247 ep->credit_ceiling = 200;
1248 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1249 ep->flags |= OZ_F_EP_BUFFERING;
1250 oz_event_log(OZ_EVT_EP_BUFFERING,
1251 ep->ep_num | USB_DIR_IN, 1, NULL, 0);
1253 ep->flags |= OZ_F_EP_HAVE_STREAM;
1254 if (oz_usb_stream_create(port->hpd, ep_num))
1255 ep->flags &= ~OZ_F_EP_HAVE_STREAM;
1258 spin_lock_bh(&ozhcd->hcd_lock);
1259 if (ep_addr & USB_ENDPOINT_DIR_MASK) {
1260 port->in_ep[ep_num] = ep;
1261 port->iface[if_ix].ep_mask |=
1262 (1<<(ep_num+OZ_NB_ENDPOINTS));
1263 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1264 == USB_ENDPOINT_XFER_ISOC) {
1265 list_add_tail(&ep->link, &port->isoc_in_ep);
1266 request_heartbeat = 1;
1269 port->out_ep[ep_num] = ep;
1270 port->iface[if_ix].ep_mask |= (1<<ep_num);
1271 if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK)
1272 == USB_ENDPOINT_XFER_ISOC) {
1273 list_add_tail(&ep->link, &port->isoc_out_ep);
1274 request_heartbeat = 1;
1277 spin_unlock_bh(&ozhcd->hcd_lock);
1278 if (request_heartbeat && port->hpd)
1279 oz_usb_request_heartbeat(port->hpd);
1283 /*------------------------------------------------------------------------------
1286 static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd,
1287 struct oz_port *port, int if_ix)
1289 struct oz_hcd *ozhcd = port->ozhcd;
1292 struct list_head ep_list;
1294 oz_trace("Deleting endpoints for interface %d\n", if_ix);
1295 if (if_ix >= port->num_iface)
1297 INIT_LIST_HEAD(&ep_list);
1298 spin_lock_bh(&ozhcd->hcd_lock);
1299 mask = port->iface[if_ix].ep_mask;
1300 port->iface[if_ix].ep_mask = 0;
1301 for (i = 0; i < OZ_NB_ENDPOINTS; i++) {
1302 struct list_head *e;
1303 /* Gather OUT endpoints.
1305 if ((mask & (1<<i)) && port->out_ep[i]) {
1306 e = &port->out_ep[i]->link;
1307 port->out_ep[i] = NULL;
1308 /* Remove from isoc list if present.
1310 list_move_tail(e, &ep_list);
1312 /* Gather IN endpoints.
1314 if ((mask & (1<<(i+OZ_NB_ENDPOINTS))) && port->in_ep[i]) {
1315 e = &port->in_ep[i]->link;
1316 port->in_ep[i] = NULL;
1317 list_move_tail(e, &ep_list);
1320 spin_unlock_bh(&ozhcd->hcd_lock);
1321 while (!list_empty(&ep_list)) {
1322 struct oz_endpoint *ep =
1323 list_first_entry(&ep_list, struct oz_endpoint, link);
1324 list_del_init(&ep->link);
1325 oz_ep_free(port, ep);
1328 /*------------------------------------------------------------------------------
1331 static int oz_build_endpoints_for_config(struct usb_hcd *hcd,
1332 struct oz_port *port, struct usb_host_config *config,
1335 struct oz_hcd *ozhcd = port->ozhcd;
1337 int num_iface = config->desc.bNumInterfaces;
1339 struct oz_interface *iface;
1341 iface = kmalloc(num_iface*sizeof(struct oz_interface),
1342 mem_flags | __GFP_ZERO);
1345 spin_lock_bh(&ozhcd->hcd_lock);
1346 port->iface = iface;
1347 port->num_iface = num_iface;
1348 spin_unlock_bh(&ozhcd->hcd_lock);
1350 for (i = 0; i < num_iface; i++) {
1351 struct usb_host_interface *intf =
1352 &config->intf_cache[i]->altsetting[0];
1353 if (oz_build_endpoints_for_interface(hcd, port, intf,
1359 oz_clean_endpoints_for_config(hcd, port);
1362 /*------------------------------------------------------------------------------
1365 static void oz_clean_endpoints_for_config(struct usb_hcd *hcd,
1366 struct oz_port *port)
1368 struct oz_hcd *ozhcd = port->ozhcd;
1370 oz_trace("Deleting endpoints for configuration.\n");
1371 for (i = 0; i < port->num_iface; i++)
1372 oz_clean_endpoints_for_interface(hcd, port, i);
1373 spin_lock_bh(&ozhcd->hcd_lock);
1375 oz_trace("Freeing interfaces object.\n");
1379 port->num_iface = 0;
1380 spin_unlock_bh(&ozhcd->hcd_lock);
1382 /*------------------------------------------------------------------------------
1385 static void *oz_claim_hpd(struct oz_port *port)
1388 struct oz_hcd *ozhcd = port->ozhcd;
1389 spin_lock_bh(&ozhcd->hcd_lock);
1393 spin_unlock_bh(&ozhcd->hcd_lock);
1396 /*------------------------------------------------------------------------------
1399 static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb,
1402 struct usb_ctrlrequest *setup;
1409 unsigned complete = 0;
1412 struct oz_port *port = NULL;
1414 oz_trace2(OZ_TRACE_URB, "%lu: oz_process_ep0_urb(%p)\n", jiffies, urb);
1415 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1420 port = &ozhcd->ports[port_ix];
1421 if (((port->flags & OZ_PORT_F_PRESENT) == 0)
1422 || (port->flags & OZ_PORT_F_DYING)) {
1423 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1424 port_ix, urb->dev->devnum);
1428 /* Store port in private context data.
1431 setup = (struct usb_ctrlrequest *)urb->setup_packet;
1432 windex = le16_to_cpu(setup->wIndex);
1433 wvalue = le16_to_cpu(setup->wValue);
1434 wlength = le16_to_cpu(setup->wLength);
1435 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequestType = %x\n",
1436 setup->bRequestType);
1437 oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequest = %x\n", setup->bRequest);
1438 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wValue = %x\n", wvalue);
1439 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wIndex = %x\n", windex);
1440 oz_trace2(OZ_TRACE_CTRL_DETAIL, "wLength = %x\n", wlength);
1442 req_id = port->next_req_id++;
1443 hpd = oz_claim_hpd(port);
1445 oz_trace("Cannot claim port\n");
1450 if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1451 /* Standard requests
1453 switch (setup->bRequest) {
1454 case USB_REQ_GET_DESCRIPTOR:
1455 oz_trace("USB_REQ_GET_DESCRIPTOR - req\n");
1457 case USB_REQ_SET_ADDRESS:
1458 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest,
1459 0, NULL, setup->bRequestType);
1460 oz_trace("USB_REQ_SET_ADDRESS - req\n");
1461 oz_trace("Port %d address is 0x%x\n", ozhcd->conn_port,
1462 (u8)le16_to_cpu(setup->wValue));
1463 spin_lock_bh(&ozhcd->hcd_lock);
1464 if (ozhcd->conn_port >= 0) {
1465 ozhcd->ports[ozhcd->conn_port].bus_addr =
1466 (u8)le16_to_cpu(setup->wValue);
1467 oz_trace("Clearing conn_port\n");
1468 ozhcd->conn_port = -1;
1470 spin_unlock_bh(&ozhcd->hcd_lock);
1473 case USB_REQ_SET_CONFIGURATION:
1474 oz_trace("USB_REQ_SET_CONFIGURATION - req\n");
1476 case USB_REQ_GET_CONFIGURATION:
1477 /* We short circuit this case and reply directly since
1478 * we have the selected configuration number cached.
1480 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0,
1481 NULL, setup->bRequestType);
1482 oz_trace("USB_REQ_GET_CONFIGURATION - reply now\n");
1483 if (urb->transfer_buffer_length >= 1) {
1484 urb->actual_length = 1;
1485 *((u8 *)urb->transfer_buffer) =
1492 case USB_REQ_GET_INTERFACE:
1493 /* We short circuit this case and reply directly since
1494 * we have the selected interface alternative cached.
1496 oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0,
1497 NULL, setup->bRequestType);
1498 oz_trace("USB_REQ_GET_INTERFACE - reply now\n");
1499 if (urb->transfer_buffer_length >= 1) {
1500 urb->actual_length = 1;
1501 *((u8 *)urb->transfer_buffer) =
1502 port->iface[(u8)windex].alt;
1503 oz_trace("interface = %d alt = %d\n",
1504 windex, port->iface[(u8)windex].alt);
1510 case USB_REQ_SET_INTERFACE:
1511 oz_trace("USB_REQ_SET_INTERFACE - req\n");
1515 if (!rc && !complete) {
1517 if ((setup->bRequestType & USB_DIR_IN) == 0)
1519 urb->actual_length = data_len;
1520 if (oz_usb_control_req(port->hpd, req_id, setup,
1521 urb->transfer_buffer, data_len)) {
1524 /* Note: we are queuing the request after we have
1525 * submitted it to be transmitted. If the request were
1526 * to complete before we queued it then it would not
1527 * be found in the queue. It seems impossible for
1528 * this to happen but if it did the request would
1529 * be resubmitted so the problem would hopefully
1530 * resolve itself. Putting the request into the
1531 * queue before it has been sent is worse since the
1532 * urb could be cancelled while we are using it
1533 * to build the request.
1535 if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id))
1541 if (rc || complete) {
1542 oz_trace("Completing request locally\n");
1543 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1545 oz_usb_request_heartbeat(port->hpd);
1548 /*------------------------------------------------------------------------------
1551 static int oz_urb_process(struct oz_hcd *ozhcd, struct urb *urb)
1554 struct oz_port *port = urb->hcpriv;
1556 /* When we are paranoid we keep a list of urbs which we check against
1557 * before handing one back. This is just for debugging during
1558 * development and should be turned off in the released driver.
1560 oz_remember_urb(urb);
1561 /* Check buffer is valid.
1563 if (!urb->transfer_buffer && urb->transfer_buffer_length)
1565 /* Check if there is a device at the port - refuse if not.
1567 if ((port->flags & OZ_PORT_F_PRESENT) == 0)
1569 ep_addr = usb_pipeendpoint(urb->pipe);
1571 /* If the request is not for EP0 then queue it.
1573 if (oz_enqueue_ep_urb(port, ep_addr, usb_pipein(urb->pipe),
1577 oz_process_ep0_urb(ozhcd, urb, GFP_ATOMIC);
1581 /*------------------------------------------------------------------------------
1584 static void oz_urb_process_tasklet(unsigned long unused)
1586 unsigned long irq_state;
1588 struct oz_hcd *ozhcd = oz_hcd_claim();
1592 /* This is called from a tasklet so is in softirq context but the urb
1593 * list is filled from any context so we need to lock
1594 * appropriately while removing urbs.
1596 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1597 while (!list_empty(&ozhcd->urb_pending_list)) {
1598 struct oz_urb_link *urbl =
1599 list_first_entry(&ozhcd->urb_pending_list,
1600 struct oz_urb_link, link);
1601 list_del_init(&urbl->link);
1602 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1604 oz_free_urb_link(urbl);
1605 rc = oz_urb_process(ozhcd, urb);
1607 oz_complete_urb(ozhcd->hcd, urb, rc, 0);
1608 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1610 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1613 /*------------------------------------------------------------------------------
1614 * This function searches for the urb in any of the lists it could be in.
1615 * If it is found it is removed from the list and completed. If the urb is
1616 * being processed then it won't be in a list so won't be found. However, the
1617 * call to usb_hcd_check_unlink_urb() will set the value of the unlinked field
1618 * to a non-zero value. When an attempt is made to put the urb back in a list
1619 * the unlinked field will be checked and the urb will then be completed.
1622 static void oz_urb_cancel(struct oz_port *port, u8 ep_num, struct urb *urb)
1624 struct oz_urb_link *urbl = NULL;
1625 struct list_head *e;
1626 struct oz_hcd *ozhcd;
1627 unsigned long irq_state;
1630 oz_trace("ERRORERROR: oz_urb_cancel(%p) port is null\n", urb);
1633 ozhcd = port->ozhcd;
1634 if (ozhcd == NULL) {
1635 oz_trace("ERRORERROR: oz_urb_cancel(%p) ozhcd is null\n", urb);
1639 /* Look in the tasklet queue.
1641 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1642 list_for_each(e, &ozhcd->urb_cancel_list) {
1643 urbl = container_of(e, struct oz_urb_link, link);
1644 if (urb == urbl->urb) {
1646 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1650 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1653 /* Look in the orphanage.
1655 spin_lock_irqsave(&ozhcd->hcd_lock, irq_state);
1656 list_for_each(e, &ozhcd->orphanage) {
1657 urbl = container_of(e, struct oz_urb_link, link);
1658 if (urbl->urb == urb) {
1660 oz_trace("Found urb in orphanage\n");
1664 ix = (ep_num & 0xf);
1666 if ((ep_num & USB_DIR_IN) && ix)
1667 urbl = oz_remove_urb(port->in_ep[ix], urb);
1669 urbl = oz_remove_urb(port->out_ep[ix], urb);
1671 spin_unlock_irqrestore(&ozhcd->hcd_lock, irq_state);
1674 urb->actual_length = 0;
1675 oz_free_urb_link(urbl);
1676 oz_complete_urb(ozhcd->hcd, urb, -EPIPE, 0);
1679 /*------------------------------------------------------------------------------
1682 static void oz_urb_cancel_tasklet(unsigned long unused)
1684 unsigned long irq_state;
1686 struct oz_hcd *ozhcd = oz_hcd_claim();
1689 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1690 while (!list_empty(&ozhcd->urb_cancel_list)) {
1691 struct oz_urb_link *urbl =
1692 list_first_entry(&ozhcd->urb_cancel_list,
1693 struct oz_urb_link, link);
1694 list_del_init(&urbl->link);
1695 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1698 oz_urb_cancel(urbl->port, urbl->ep_num, urb);
1699 oz_free_urb_link(urbl);
1700 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1702 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1705 /*------------------------------------------------------------------------------
1708 static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status)
1711 struct oz_urb_link *urbl;
1712 while (!list_empty(&ozhcd->orphanage)) {
1713 urbl = list_first_entry(&ozhcd->orphanage,
1714 struct oz_urb_link, link);
1715 list_del(&urbl->link);
1716 oz_complete_urb(ozhcd->hcd, urbl->urb, status, 0);
1717 oz_free_urb_link(urbl);
1721 /*------------------------------------------------------------------------------
1724 static int oz_hcd_start(struct usb_hcd *hcd)
1726 oz_trace("oz_hcd_start()\n");
1727 hcd->power_budget = 200;
1728 hcd->state = HC_STATE_RUNNING;
1729 hcd->uses_new_polling = 1;
1732 /*------------------------------------------------------------------------------
1735 static void oz_hcd_stop(struct usb_hcd *hcd)
1737 oz_trace("oz_hcd_stop()\n");
1739 /*------------------------------------------------------------------------------
1742 static void oz_hcd_shutdown(struct usb_hcd *hcd)
1744 oz_trace("oz_hcd_shutdown()\n");
1746 /*------------------------------------------------------------------------------
1749 #ifdef WANT_EVENT_TRACE
1750 static u8 oz_get_irq_ctx(void)
1759 #endif /* WANT_EVENT_TRACE */
1760 /*------------------------------------------------------------------------------
1761 * Called to queue an urb for the device.
1762 * This function should return a non-zero error code if it fails the urb but
1763 * should not call usb_hcd_giveback_urb().
1766 static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1769 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1772 struct oz_port *port;
1773 unsigned long irq_state;
1774 struct oz_urb_link *urbl;
1775 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_enqueue(%p)\n",
1777 oz_event_log(OZ_EVT_URB_SUBMIT, oz_get_irq_ctx(),
1778 (u16)urb->number_of_packets, urb, urb->pipe);
1779 if (unlikely(ozhcd == NULL)) {
1780 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not ozhcd.\n",
1784 if (unlikely(hcd->state != HC_STATE_RUNNING)) {
1785 oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not running.\n",
1789 port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum);
1792 port = &ozhcd->ports[port_ix];
1795 if ((port->flags & OZ_PORT_F_PRESENT) == 0) {
1796 oz_trace("Refusing URB port_ix = %d devnum = %d\n",
1797 port_ix, urb->dev->devnum);
1801 /* Put request in queue for processing by tasklet.
1803 urbl = oz_alloc_urb_link();
1804 if (unlikely(urbl == NULL))
1807 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1808 rc = usb_hcd_link_urb_to_ep(hcd, urb);
1810 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1811 oz_free_urb_link(urbl);
1814 list_add_tail(&urbl->link, &ozhcd->urb_pending_list);
1815 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1816 tasklet_schedule(&g_urb_process_tasklet);
1817 atomic_inc(&g_pending_urbs);
1820 /*------------------------------------------------------------------------------
1823 static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep,
1826 struct oz_urb_link *urbl = NULL;
1827 struct list_head *e;
1828 if (unlikely(ep == NULL))
1830 list_for_each(e, &ep->urb_list) {
1831 urbl = container_of(e, struct oz_urb_link, link);
1832 if (urbl->urb == urb) {
1834 if (usb_pipeisoc(urb->pipe)) {
1835 ep->credit -= urb->number_of_packets;
1838 oz_event_log(OZ_EVT_EP_CREDIT,
1839 usb_pipein(urb->pipe) ?
1840 (ep->ep_num | USB_DIR_IN) : ep->ep_num,
1841 0, NULL, ep->credit);
1848 /*------------------------------------------------------------------------------
1849 * Called to dequeue a previously submitted urb for the device.
1852 static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
1854 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1855 struct oz_urb_link *urbl = NULL;
1857 unsigned long irq_state;
1858 oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_dequeue(%p)\n", jiffies, urb);
1859 urbl = oz_alloc_urb_link();
1860 if (unlikely(urbl == NULL))
1862 spin_lock_irqsave(&g_tasklet_lock, irq_state);
1863 /* The following function checks the urb is still in the queue
1864 * maintained by the core and that the unlinked field is zero.
1865 * If both are true the function sets the unlinked field and returns
1866 * zero. Otherwise it returns an error.
1868 rc = usb_hcd_check_unlink_urb(hcd, urb, status);
1869 /* We have to check we haven't completed the urb or are about
1870 * to complete it. When we do we set hcpriv to 0 so if this has
1871 * already happened we don't put the urb in the cancel queue.
1873 if ((rc == 0) && urb->hcpriv) {
1875 urbl->port = (struct oz_port *)urb->hcpriv;
1876 urbl->ep_num = usb_pipeendpoint(urb->pipe);
1877 if (usb_pipein(urb->pipe))
1878 urbl->ep_num |= USB_DIR_IN;
1879 list_add_tail(&urbl->link, &ozhcd->urb_cancel_list);
1880 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1881 tasklet_schedule(&g_urb_cancel_tasklet);
1883 spin_unlock_irqrestore(&g_tasklet_lock, irq_state);
1884 oz_free_urb_link(urbl);
1888 /*------------------------------------------------------------------------------
1891 static void oz_hcd_endpoint_disable(struct usb_hcd *hcd,
1892 struct usb_host_endpoint *ep)
1894 oz_trace("oz_hcd_endpoint_disable\n");
1896 /*------------------------------------------------------------------------------
1899 static void oz_hcd_endpoint_reset(struct usb_hcd *hcd,
1900 struct usb_host_endpoint *ep)
1902 oz_trace("oz_hcd_endpoint_reset\n");
1904 /*------------------------------------------------------------------------------
1907 static int oz_hcd_get_frame_number(struct usb_hcd *hcd)
1909 oz_trace("oz_hcd_get_frame_number\n");
1910 return oz_usb_get_frame_number();
1912 /*------------------------------------------------------------------------------
1914 * This is called as a consquence of us calling usb_hcd_poll_rh_status() and we
1915 * always do that in softirq context.
1917 static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf)
1919 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1922 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_status_data()\n");
1925 spin_lock_bh(&ozhcd->hcd_lock);
1926 for (i = 0; i < OZ_NB_PORTS; i++) {
1927 if (ozhcd->ports[i].flags & OZ_PORT_F_CHANGED) {
1928 oz_trace2(OZ_TRACE_HUB, "Port %d changed\n", i);
1929 ozhcd->ports[i].flags &= ~OZ_PORT_F_CHANGED;
1933 spin_unlock_bh(&ozhcd->hcd_lock);
1934 return buf[0] ? 1 : 0;
1936 /*------------------------------------------------------------------------------
1939 static void oz_get_hub_descriptor(struct usb_hcd *hcd,
1940 struct usb_hub_descriptor *desc)
1942 oz_trace2(OZ_TRACE_HUB, "GetHubDescriptor\n");
1943 memset(desc, 0, sizeof(*desc));
1944 desc->bDescriptorType = 0x29;
1945 desc->bDescLength = 9;
1946 desc->wHubCharacteristics = (__force __u16)
1947 __constant_cpu_to_le16(0x0001);
1948 desc->bNbrPorts = OZ_NB_PORTS;
1950 /*------------------------------------------------------------------------------
1953 static int oz_set_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
1955 struct oz_port *port;
1957 u8 port_id = (u8)windex;
1958 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
1959 unsigned set_bits = 0;
1960 unsigned clear_bits = 0;
1961 oz_trace2(OZ_TRACE_HUB, "SetPortFeature\n");
1962 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
1964 port = &ozhcd->ports[port_id-1];
1966 case USB_PORT_FEAT_CONNECTION:
1967 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
1969 case USB_PORT_FEAT_ENABLE:
1970 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
1972 case USB_PORT_FEAT_SUSPEND:
1973 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
1975 case USB_PORT_FEAT_OVER_CURRENT:
1976 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
1978 case USB_PORT_FEAT_RESET:
1979 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
1980 set_bits = USB_PORT_STAT_ENABLE | (USB_PORT_STAT_C_RESET<<16);
1981 clear_bits = USB_PORT_STAT_RESET;
1982 ozhcd->ports[port_id-1].bus_addr = 0;
1984 case USB_PORT_FEAT_POWER:
1985 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
1986 set_bits |= USB_PORT_STAT_POWER;
1988 case USB_PORT_FEAT_LOWSPEED:
1989 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
1991 case USB_PORT_FEAT_C_CONNECTION:
1992 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
1994 case USB_PORT_FEAT_C_ENABLE:
1995 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
1997 case USB_PORT_FEAT_C_SUSPEND:
1998 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
2000 case USB_PORT_FEAT_C_OVER_CURRENT:
2001 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
2003 case USB_PORT_FEAT_C_RESET:
2004 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
2006 case USB_PORT_FEAT_TEST:
2007 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
2009 case USB_PORT_FEAT_INDICATOR:
2010 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
2013 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
2016 if (set_bits || clear_bits) {
2017 spin_lock_bh(&port->port_lock);
2018 port->status &= ~clear_bits;
2019 port->status |= set_bits;
2020 spin_unlock_bh(&port->port_lock);
2022 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
2026 /*------------------------------------------------------------------------------
2029 static int oz_clear_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex)
2031 struct oz_port *port;
2033 u8 port_id = (u8)windex;
2034 struct oz_hcd *ozhcd = oz_hcd_private(hcd);
2035 unsigned clear_bits = 0;
2036 oz_trace2(OZ_TRACE_HUB, "ClearPortFeature\n");
2037 if ((port_id < 1) || (port_id > OZ_NB_PORTS))
2039 port = &ozhcd->ports[port_id-1];
2041 case USB_PORT_FEAT_CONNECTION:
2042 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n");
2044 case USB_PORT_FEAT_ENABLE:
2045 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n");
2046 clear_bits = USB_PORT_STAT_ENABLE;
2048 case USB_PORT_FEAT_SUSPEND:
2049 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n");
2051 case USB_PORT_FEAT_OVER_CURRENT:
2052 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n");
2054 case USB_PORT_FEAT_RESET:
2055 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n");
2057 case USB_PORT_FEAT_POWER:
2058 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n");
2059 clear_bits |= USB_PORT_STAT_POWER;
2061 case USB_PORT_FEAT_LOWSPEED:
2062 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n");
2064 case USB_PORT_FEAT_C_CONNECTION:
2065 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n");
2066 clear_bits = (USB_PORT_STAT_C_CONNECTION << 16);
2068 case USB_PORT_FEAT_C_ENABLE:
2069 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n");
2070 clear_bits = (USB_PORT_STAT_C_ENABLE << 16);
2072 case USB_PORT_FEAT_C_SUSPEND:
2073 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n");
2075 case USB_PORT_FEAT_C_OVER_CURRENT:
2076 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n");
2078 case USB_PORT_FEAT_C_RESET:
2079 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n");
2080 clear_bits = (USB_PORT_FEAT_C_RESET << 16);
2082 case USB_PORT_FEAT_TEST:
2083 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n");
2085 case USB_PORT_FEAT_INDICATOR:
2086 oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n");
2089 oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue);
2093 spin_lock_bh(&port->port_lock);
2094 port->status &= ~clear_bits;
2095 spin_unlock_bh(&port->port_lock);
2097 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id,
2098 ozhcd->ports[port_id-1].status);
2101 /*------------------------------------------------------------------------------
2104 static int oz_get_port_status(struct usb_hcd *hcd, u16 windex, char *buf)
2106 struct oz_hcd *ozhcd;
2108 if ((windex < 1) || (windex > OZ_NB_PORTS))
2110 ozhcd = oz_hcd_private(hcd);
2111 oz_trace2(OZ_TRACE_HUB, "GetPortStatus windex = %d\n", windex);
2112 status = ozhcd->ports[windex-1].status;
2113 put_unaligned(cpu_to_le32(status), (__le32 *)buf);
2114 oz_trace2(OZ_TRACE_HUB, "Port[%d] status = %x\n", windex, status);
2117 /*------------------------------------------------------------------------------
2120 static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue,
2121 u16 windex, char *buf, u16 wlength)
2124 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_control()\n");
2126 case ClearHubFeature:
2127 oz_trace2(OZ_TRACE_HUB, "ClearHubFeature: %d\n", req_type);
2129 case ClearPortFeature:
2130 err = oz_clear_port_feature(hcd, wvalue, windex);
2132 case GetHubDescriptor:
2133 oz_get_hub_descriptor(hcd, (struct usb_hub_descriptor *)buf);
2136 oz_trace2(OZ_TRACE_HUB, "GetHubStatus: req_type = 0x%x\n",
2138 put_unaligned(__constant_cpu_to_le32(0), (__le32 *)buf);
2141 err = oz_get_port_status(hcd, windex, buf);
2144 oz_trace2(OZ_TRACE_HUB, "SetHubFeature: %d\n", req_type);
2146 case SetPortFeature:
2147 err = oz_set_port_feature(hcd, wvalue, windex);
2150 oz_trace2(OZ_TRACE_HUB, "Other: %d\n", req_type);
2155 /*------------------------------------------------------------------------------
2158 static int oz_hcd_bus_suspend(struct usb_hcd *hcd)
2160 struct oz_hcd *ozhcd;
2161 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_suspend()\n");
2162 ozhcd = oz_hcd_private(hcd);
2163 spin_lock_bh(&ozhcd->hcd_lock);
2164 hcd->state = HC_STATE_SUSPENDED;
2165 ozhcd->flags |= OZ_HDC_F_SUSPENDED;
2166 spin_unlock_bh(&ozhcd->hcd_lock);
2169 /*------------------------------------------------------------------------------
2172 static int oz_hcd_bus_resume(struct usb_hcd *hcd)
2174 struct oz_hcd *ozhcd;
2175 oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_resume()\n");
2176 ozhcd = oz_hcd_private(hcd);
2177 spin_lock_bh(&ozhcd->hcd_lock);
2178 ozhcd->flags &= ~OZ_HDC_F_SUSPENDED;
2179 hcd->state = HC_STATE_RUNNING;
2180 spin_unlock_bh(&ozhcd->hcd_lock);
2183 /*------------------------------------------------------------------------------
2185 static void oz_plat_shutdown(struct platform_device *dev)
2187 oz_trace("oz_plat_shutdown()\n");
2189 /*------------------------------------------------------------------------------
2192 static int oz_plat_probe(struct platform_device *dev)
2196 struct usb_hcd *hcd;
2197 struct oz_hcd *ozhcd;
2198 oz_trace("oz_plat_probe()\n");
2199 hcd = usb_create_hcd(&g_oz_hc_drv, &dev->dev, dev_name(&dev->dev));
2201 oz_trace("Failed to created hcd object OK\n");
2204 ozhcd = oz_hcd_private(hcd);
2205 memset(ozhcd, 0, sizeof(*ozhcd));
2206 INIT_LIST_HEAD(&ozhcd->urb_pending_list);
2207 INIT_LIST_HEAD(&ozhcd->urb_cancel_list);
2208 INIT_LIST_HEAD(&ozhcd->orphanage);
2210 ozhcd->conn_port = -1;
2211 spin_lock_init(&ozhcd->hcd_lock);
2212 for (i = 0; i < OZ_NB_PORTS; i++) {
2213 struct oz_port *port = &ozhcd->ports[i];
2214 port->ozhcd = ozhcd;
2217 port->bus_addr = 0xff;
2218 spin_lock_init(&port->port_lock);
2220 err = usb_add_hcd(hcd, 0, 0);
2222 oz_trace("Failed to add hcd object OK\n");
2226 spin_lock_bh(&g_hcdlock);
2228 spin_unlock_bh(&g_hcdlock);
2231 /*------------------------------------------------------------------------------
2234 static int oz_plat_remove(struct platform_device *dev)
2236 struct usb_hcd *hcd = platform_get_drvdata(dev);
2237 struct oz_hcd *ozhcd;
2238 oz_trace("oz_plat_remove()\n");
2241 ozhcd = oz_hcd_private(hcd);
2242 spin_lock_bh(&g_hcdlock);
2243 if (ozhcd == g_ozhcd)
2245 spin_unlock_bh(&g_hcdlock);
2246 oz_trace("Clearing orphanage\n");
2247 oz_hcd_clear_orphanage(ozhcd, -EPIPE);
2248 oz_trace("Removing hcd\n");
2249 usb_remove_hcd(hcd);
2251 oz_empty_link_pool();
2254 /*------------------------------------------------------------------------------
2257 static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg)
2259 oz_trace("oz_plat_suspend()\n");
2262 /*------------------------------------------------------------------------------
2265 static int oz_plat_resume(struct platform_device *dev)
2267 oz_trace("oz_plat_resume()\n");
2270 /*------------------------------------------------------------------------------
2273 int oz_hcd_init(void)
2278 tasklet_init(&g_urb_process_tasklet, oz_urb_process_tasklet, 0);
2279 tasklet_init(&g_urb_cancel_tasklet, oz_urb_cancel_tasklet, 0);
2280 err = platform_driver_register(&g_oz_plat_drv);
2281 oz_trace("platform_driver_register() returned %d\n", err);
2284 g_plat_dev = platform_device_alloc(OZ_PLAT_DEV_NAME, -1);
2285 if (g_plat_dev == NULL) {
2289 oz_trace("platform_device_alloc() succeeded\n");
2290 err = platform_device_add(g_plat_dev);
2293 oz_trace("platform_device_add() succeeded\n");
2296 platform_device_put(g_plat_dev);
2298 platform_driver_unregister(&g_oz_plat_drv);
2300 tasklet_disable(&g_urb_process_tasklet);
2301 tasklet_disable(&g_urb_cancel_tasklet);
2302 oz_trace("oz_hcd_init() failed %d\n", err);
2305 /*------------------------------------------------------------------------------
2308 void oz_hcd_term(void)
2310 tasklet_kill(&g_urb_process_tasklet);
2311 tasklet_kill(&g_urb_cancel_tasklet);
2312 platform_device_unregister(g_plat_dev);
2313 platform_driver_unregister(&g_oz_plat_drv);
2314 oz_trace("Pending urbs:%d\n", atomic_read(&g_pending_urbs));