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64a21d025d
If some problem occurs during ehci startup, for instance, request_irq fails, echi hcd driver tries it best to cleanup, but fails to unregister reboot notifier, which in turn leads to crash on reboot/poweroff. The following patch resolves this problem by not using reboot notifiers anymore, but instead making ehci/ohci driver get its own shutdown method. For PCI, it is done through pci glue, for everything else through platform driver glue. One downside: sa1111 does not use platform driver stuff, and does not have its own shutdown hook, so no 'shutdown' is called for it now. I'm not sure if it is really necessary on that platform, though. Signed-off-by: Aleks Gorelov <dared1st@yahoo.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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*
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* This file is licenced under the GPL.
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*/
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/*-------------------------------------------------------------------------*/
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/*
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* There's basically three types of memory:
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* - data used only by the HCD ... kmalloc is fine
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* - async and periodic schedules, shared by HC and HCD ... these
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* need to use dma_pool or dma_alloc_coherent
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* - driver buffers, read/written by HC ... the hcd glue or the
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* device driver provides us with dma addresses
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*
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* There's also PCI "register" data, which is memory mapped.
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* No memory seen by this driver is pagable.
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*/
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/*-------------------------------------------------------------------------*/
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static void ohci_hcd_init (struct ohci_hcd *ohci)
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{
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ohci->next_statechange = jiffies;
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spin_lock_init (&ohci->lock);
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INIT_LIST_HEAD (&ohci->pending);
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}
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/*-------------------------------------------------------------------------*/
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static int ohci_mem_init (struct ohci_hcd *ohci)
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{
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ohci->td_cache = dma_pool_create ("ohci_td",
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ohci_to_hcd(ohci)->self.controller,
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sizeof (struct td),
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32 /* byte alignment */,
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0 /* no page-crossing issues */);
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if (!ohci->td_cache)
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return -ENOMEM;
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ohci->ed_cache = dma_pool_create ("ohci_ed",
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ohci_to_hcd(ohci)->self.controller,
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sizeof (struct ed),
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16 /* byte alignment */,
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0 /* no page-crossing issues */);
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if (!ohci->ed_cache) {
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dma_pool_destroy (ohci->td_cache);
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return -ENOMEM;
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}
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return 0;
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}
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static void ohci_mem_cleanup (struct ohci_hcd *ohci)
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{
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if (ohci->td_cache) {
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dma_pool_destroy (ohci->td_cache);
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ohci->td_cache = NULL;
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}
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if (ohci->ed_cache) {
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dma_pool_destroy (ohci->ed_cache);
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ohci->ed_cache = NULL;
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}
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}
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/*-------------------------------------------------------------------------*/
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/* ohci "done list" processing needs this mapping */
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static inline struct td *
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dma_to_td (struct ohci_hcd *hc, dma_addr_t td_dma)
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{
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struct td *td;
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td_dma &= TD_MASK;
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td = hc->td_hash [TD_HASH_FUNC(td_dma)];
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while (td && td->td_dma != td_dma)
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td = td->td_hash;
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return td;
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}
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/* TDs ... */
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static struct td *
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td_alloc (struct ohci_hcd *hc, gfp_t mem_flags)
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{
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dma_addr_t dma;
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struct td *td;
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td = dma_pool_alloc (hc->td_cache, mem_flags, &dma);
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if (td) {
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/* in case hc fetches it, make it look dead */
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memset (td, 0, sizeof *td);
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td->hwNextTD = cpu_to_hc32 (hc, dma);
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td->td_dma = dma;
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/* hashed in td_fill */
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}
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return td;
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}
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static void
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td_free (struct ohci_hcd *hc, struct td *td)
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{
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struct td **prev = &hc->td_hash [TD_HASH_FUNC (td->td_dma)];
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while (*prev && *prev != td)
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prev = &(*prev)->td_hash;
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if (*prev)
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*prev = td->td_hash;
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else if ((td->hwINFO & cpu_to_hc32(hc, TD_DONE)) != 0)
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ohci_dbg (hc, "no hash for td %p\n", td);
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dma_pool_free (hc->td_cache, td, td->td_dma);
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}
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/*-------------------------------------------------------------------------*/
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/* EDs ... */
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static struct ed *
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ed_alloc (struct ohci_hcd *hc, gfp_t mem_flags)
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{
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dma_addr_t dma;
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struct ed *ed;
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ed = dma_pool_alloc (hc->ed_cache, mem_flags, &dma);
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if (ed) {
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memset (ed, 0, sizeof (*ed));
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INIT_LIST_HEAD (&ed->td_list);
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ed->dma = dma;
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}
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return ed;
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}
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static void
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ed_free (struct ohci_hcd *hc, struct ed *ed)
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{
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dma_pool_free (hc->ed_cache, ed, ed->dma);
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}
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