1242 строки
32 KiB
C
1242 строки
32 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 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
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*
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* [ Initialisation is based on Linus' ]
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* [ uhci code and gregs ohci fragments ]
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* [ (C) Copyright 1999 Linus Torvalds ]
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* [ (C) Copyright 1999 Gregory P. Smith]
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*
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*
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* OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
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* interfaces (though some non-x86 Intel chips use it). It supports
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* smarter hardware than UHCI. A download link for the spec available
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* through the http://www.usb.org website.
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include <linux/usb/otg.h>
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#include <linux/dma-mapping.h>
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#include <linux/dmapool.h>
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#include <linux/reboot.h>
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#include <linux/workqueue.h>
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#include <linux/debugfs.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/unaligned.h>
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#include <asm/byteorder.h>
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#include "../core/hcd.h"
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#define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
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#define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
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/*-------------------------------------------------------------------------*/
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#undef OHCI_VERBOSE_DEBUG /* not always helpful */
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/* For initializing controller (mask in an HCFS mode too) */
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#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
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#define OHCI_INTR_INIT \
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(OHCI_INTR_MIE | OHCI_INTR_RHSC | OHCI_INTR_UE \
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| OHCI_INTR_RD | OHCI_INTR_WDH)
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#ifdef __hppa__
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/* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
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#define IR_DISABLE
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#endif
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#ifdef CONFIG_ARCH_OMAP
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/* OMAP doesn't support IR (no SMM; not needed) */
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#define IR_DISABLE
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#endif
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/*-------------------------------------------------------------------------*/
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static const char hcd_name [] = "ohci_hcd";
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#define STATECHANGE_DELAY msecs_to_jiffies(300)
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#include "ohci.h"
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static void ohci_dump (struct ohci_hcd *ohci, int verbose);
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static int ohci_init (struct ohci_hcd *ohci);
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static void ohci_stop (struct usb_hcd *hcd);
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#if defined(CONFIG_PM) || defined(CONFIG_PCI)
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static int ohci_restart (struct ohci_hcd *ohci);
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#endif
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#ifdef CONFIG_PCI
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static void quirk_amd_pll(int state);
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static void amd_iso_dev_put(void);
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#else
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static inline void quirk_amd_pll(int state)
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{
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return;
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}
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static inline void amd_iso_dev_put(void)
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{
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return;
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}
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#endif
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#include "ohci-hub.c"
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#include "ohci-dbg.c"
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#include "ohci-mem.c"
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#include "ohci-q.c"
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/*
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* On architectures with edge-triggered interrupts we must never return
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* IRQ_NONE.
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*/
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#if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */
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#define IRQ_NOTMINE IRQ_HANDLED
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#else
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#define IRQ_NOTMINE IRQ_NONE
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#endif
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/* Some boards misreport power switching/overcurrent */
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static int distrust_firmware = 1;
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module_param (distrust_firmware, bool, 0);
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MODULE_PARM_DESC (distrust_firmware,
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"true to distrust firmware power/overcurrent setup");
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/* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */
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static int no_handshake = 0;
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module_param (no_handshake, bool, 0);
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MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake");
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/*-------------------------------------------------------------------------*/
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/*
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* queue up an urb for anything except the root hub
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*/
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static int ohci_urb_enqueue (
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struct usb_hcd *hcd,
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struct urb *urb,
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gfp_t mem_flags
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) {
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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struct ed *ed;
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urb_priv_t *urb_priv;
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unsigned int pipe = urb->pipe;
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int i, size = 0;
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unsigned long flags;
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int retval = 0;
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#ifdef OHCI_VERBOSE_DEBUG
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urb_print(urb, "SUB", usb_pipein(pipe), -EINPROGRESS);
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#endif
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/* every endpoint has a ed, locate and maybe (re)initialize it */
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if (! (ed = ed_get (ohci, urb->ep, urb->dev, pipe, urb->interval)))
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return -ENOMEM;
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/* for the private part of the URB we need the number of TDs (size) */
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switch (ed->type) {
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case PIPE_CONTROL:
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/* td_submit_urb() doesn't yet handle these */
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if (urb->transfer_buffer_length > 4096)
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return -EMSGSIZE;
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/* 1 TD for setup, 1 for ACK, plus ... */
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size = 2;
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/* FALLTHROUGH */
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// case PIPE_INTERRUPT:
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// case PIPE_BULK:
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default:
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/* one TD for every 4096 Bytes (can be upto 8K) */
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size += urb->transfer_buffer_length / 4096;
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/* ... and for any remaining bytes ... */
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if ((urb->transfer_buffer_length % 4096) != 0)
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size++;
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/* ... and maybe a zero length packet to wrap it up */
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if (size == 0)
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size++;
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else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
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&& (urb->transfer_buffer_length
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% usb_maxpacket (urb->dev, pipe,
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usb_pipeout (pipe))) == 0)
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size++;
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break;
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case PIPE_ISOCHRONOUS: /* number of packets from URB */
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size = urb->number_of_packets;
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break;
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}
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/* allocate the private part of the URB */
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urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
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mem_flags);
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if (!urb_priv)
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return -ENOMEM;
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INIT_LIST_HEAD (&urb_priv->pending);
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urb_priv->length = size;
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urb_priv->ed = ed;
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/* allocate the TDs (deferring hash chain updates) */
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for (i = 0; i < size; i++) {
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urb_priv->td [i] = td_alloc (ohci, mem_flags);
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if (!urb_priv->td [i]) {
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urb_priv->length = i;
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urb_free_priv (ohci, urb_priv);
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return -ENOMEM;
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}
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}
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spin_lock_irqsave (&ohci->lock, flags);
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/* don't submit to a dead HC */
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if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
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retval = -ENODEV;
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goto fail;
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}
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if (!HC_IS_RUNNING(hcd->state)) {
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retval = -ENODEV;
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goto fail;
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}
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retval = usb_hcd_link_urb_to_ep(hcd, urb);
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if (retval)
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goto fail;
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/* schedule the ed if needed */
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if (ed->state == ED_IDLE) {
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retval = ed_schedule (ohci, ed);
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if (retval < 0) {
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usb_hcd_unlink_urb_from_ep(hcd, urb);
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goto fail;
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}
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if (ed->type == PIPE_ISOCHRONOUS) {
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u16 frame = ohci_frame_no(ohci);
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/* delay a few frames before the first TD */
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frame += max_t (u16, 8, ed->interval);
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frame &= ~(ed->interval - 1);
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frame |= ed->branch;
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urb->start_frame = frame;
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/* yes, only URB_ISO_ASAP is supported, and
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* urb->start_frame is never used as input.
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*/
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}
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} else if (ed->type == PIPE_ISOCHRONOUS)
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urb->start_frame = ed->last_iso + ed->interval;
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/* fill the TDs and link them to the ed; and
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* enable that part of the schedule, if needed
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* and update count of queued periodic urbs
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*/
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urb->hcpriv = urb_priv;
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td_submit_urb (ohci, urb);
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fail:
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if (retval)
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urb_free_priv (ohci, urb_priv);
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spin_unlock_irqrestore (&ohci->lock, flags);
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return retval;
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}
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/*
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* decouple the URB from the HC queues (TDs, urb_priv).
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* reporting is always done
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* asynchronously, and we might be dealing with an urb that's
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* partially transferred, or an ED with other urbs being unlinked.
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*/
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static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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unsigned long flags;
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int rc;
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#ifdef OHCI_VERBOSE_DEBUG
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urb_print(urb, "UNLINK", 1, status);
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#endif
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spin_lock_irqsave (&ohci->lock, flags);
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rc = usb_hcd_check_unlink_urb(hcd, urb, status);
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if (rc) {
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; /* Do nothing */
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} else if (HC_IS_RUNNING(hcd->state)) {
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urb_priv_t *urb_priv;
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/* Unless an IRQ completed the unlink while it was being
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* handed to us, flag it for unlink and giveback, and force
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* some upcoming INTR_SF to call finish_unlinks()
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*/
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urb_priv = urb->hcpriv;
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if (urb_priv) {
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if (urb_priv->ed->state == ED_OPER)
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start_ed_unlink (ohci, urb_priv->ed);
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}
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} else {
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/*
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* with HC dead, we won't respect hc queue pointers
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* any more ... just clean up every urb's memory.
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*/
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if (urb->hcpriv)
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finish_urb(ohci, urb, status);
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}
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spin_unlock_irqrestore (&ohci->lock, flags);
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return rc;
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}
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/*-------------------------------------------------------------------------*/
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/* frees config/altsetting state for endpoints,
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* including ED memory, dummy TD, and bulk/intr data toggle
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*/
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static void
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ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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unsigned long flags;
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struct ed *ed = ep->hcpriv;
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unsigned limit = 1000;
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/* ASSERT: any requests/urbs are being unlinked */
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/* ASSERT: nobody can be submitting urbs for this any more */
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if (!ed)
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return;
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rescan:
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spin_lock_irqsave (&ohci->lock, flags);
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if (!HC_IS_RUNNING (hcd->state)) {
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sanitize:
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ed->state = ED_IDLE;
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if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
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ohci->eds_scheduled--;
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finish_unlinks (ohci, 0);
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}
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switch (ed->state) {
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case ED_UNLINK: /* wait for hw to finish? */
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/* major IRQ delivery trouble loses INTR_SF too... */
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if (limit-- == 0) {
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ohci_warn(ohci, "ED unlink timeout\n");
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if (quirk_zfmicro(ohci)) {
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ohci_warn(ohci, "Attempting ZF TD recovery\n");
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ohci->ed_to_check = ed;
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ohci->zf_delay = 2;
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}
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goto sanitize;
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}
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spin_unlock_irqrestore (&ohci->lock, flags);
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schedule_timeout_uninterruptible(1);
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goto rescan;
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case ED_IDLE: /* fully unlinked */
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if (list_empty (&ed->td_list)) {
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td_free (ohci, ed->dummy);
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ed_free (ohci, ed);
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break;
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}
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/* else FALL THROUGH */
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default:
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/* caller was supposed to have unlinked any requests;
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* that's not our job. can't recover; must leak ed.
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*/
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ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n",
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ed, ep->desc.bEndpointAddress, ed->state,
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list_empty (&ed->td_list) ? "" : " (has tds)");
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td_free (ohci, ed->dummy);
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break;
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}
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ep->hcpriv = NULL;
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spin_unlock_irqrestore (&ohci->lock, flags);
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return;
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}
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static int ohci_get_frame (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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return ohci_frame_no(ohci);
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}
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static void ohci_usb_reset (struct ohci_hcd *ohci)
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{
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ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
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ohci->hc_control &= OHCI_CTRL_RWC;
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ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
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}
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/* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
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* other cases where the next software may expect clean state from the
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* "firmware". this is bus-neutral, unlike shutdown() methods.
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*/
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static void
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ohci_shutdown (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci;
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ohci = hcd_to_ohci (hcd);
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ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
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ohci_usb_reset (ohci);
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/* flush the writes */
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(void) ohci_readl (ohci, &ohci->regs->control);
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}
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static int check_ed(struct ohci_hcd *ohci, struct ed *ed)
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{
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return (hc32_to_cpu(ohci, ed->hwINFO) & ED_IN) != 0
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&& (hc32_to_cpu(ohci, ed->hwHeadP) & TD_MASK)
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== (hc32_to_cpu(ohci, ed->hwTailP) & TD_MASK)
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&& !list_empty(&ed->td_list);
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}
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/* ZF Micro watchdog timer callback. The ZF Micro chipset sometimes completes
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* an interrupt TD but neglects to add it to the donelist. On systems with
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* this chipset, we need to periodically check the state of the queues to look
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* for such "lost" TDs.
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*/
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static void unlink_watchdog_func(unsigned long _ohci)
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{
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unsigned long flags;
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unsigned max;
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unsigned seen_count = 0;
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unsigned i;
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struct ed **seen = NULL;
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struct ohci_hcd *ohci = (struct ohci_hcd *) _ohci;
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spin_lock_irqsave(&ohci->lock, flags);
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max = ohci->eds_scheduled;
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if (!max)
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goto done;
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if (ohci->ed_to_check)
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goto out;
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seen = kcalloc(max, sizeof *seen, GFP_ATOMIC);
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if (!seen)
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goto out;
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for (i = 0; i < NUM_INTS; i++) {
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struct ed *ed = ohci->periodic[i];
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while (ed) {
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unsigned temp;
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/* scan this branch of the periodic schedule tree */
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for (temp = 0; temp < seen_count; temp++) {
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if (seen[temp] == ed) {
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/* we've checked it and what's after */
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ed = NULL;
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break;
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}
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}
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if (!ed)
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break;
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seen[seen_count++] = ed;
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if (!check_ed(ohci, ed)) {
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ed = ed->ed_next;
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continue;
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}
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/* HC's TD list is empty, but HCD sees at least one
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* TD that's not been sent through the donelist.
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*/
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ohci->ed_to_check = ed;
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ohci->zf_delay = 2;
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/* The HC may wait until the next frame to report the
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* TD as done through the donelist and INTR_WDH. (We
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* just *assume* it's not a multi-TD interrupt URB;
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* those could defer the IRQ more than one frame, using
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* DI...) Check again after the next INTR_SF.
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*/
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ohci_writel(ohci, OHCI_INTR_SF,
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&ohci->regs->intrstatus);
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ohci_writel(ohci, OHCI_INTR_SF,
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&ohci->regs->intrenable);
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/* flush those writes */
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(void) ohci_readl(ohci, &ohci->regs->control);
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goto out;
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}
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}
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out:
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kfree(seen);
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if (ohci->eds_scheduled)
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mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));
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done:
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spin_unlock_irqrestore(&ohci->lock, flags);
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}
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/*-------------------------------------------------------------------------*
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* HC functions
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*-------------------------------------------------------------------------*/
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/* init memory, and kick BIOS/SMM off */
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static int ohci_init (struct ohci_hcd *ohci)
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{
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int ret;
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struct usb_hcd *hcd = ohci_to_hcd(ohci);
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if (distrust_firmware)
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ohci->flags |= OHCI_QUIRK_HUB_POWER;
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disable (ohci);
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ohci->regs = hcd->regs;
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/* REVISIT this BIOS handshake is now moved into PCI "quirks", and
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* was never needed for most non-PCI systems ... remove the code?
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*/
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#ifndef IR_DISABLE
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/* SMM owns the HC? not for long! */
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if (!no_handshake && ohci_readl (ohci,
|
|
&ohci->regs->control) & OHCI_CTRL_IR) {
|
|
u32 temp;
|
|
|
|
ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
|
|
|
|
/* this timeout is arbitrary. we make it long, so systems
|
|
* depending on usb keyboards may be usable even if the
|
|
* BIOS/SMM code seems pretty broken.
|
|
*/
|
|
temp = 500; /* arbitrary: five seconds */
|
|
|
|
ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable);
|
|
ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus);
|
|
while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) {
|
|
msleep (10);
|
|
if (--temp == 0) {
|
|
ohci_err (ohci, "USB HC takeover failed!"
|
|
" (BIOS/SMM bug)\n");
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
ohci_usb_reset (ohci);
|
|
}
|
|
#endif
|
|
|
|
/* Disable HC interrupts */
|
|
ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
|
|
|
|
/* flush the writes, and save key bits like RWC */
|
|
if (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_RWC)
|
|
ohci->hc_control |= OHCI_CTRL_RWC;
|
|
|
|
/* Read the number of ports unless overridden */
|
|
if (ohci->num_ports == 0)
|
|
ohci->num_ports = roothub_a(ohci) & RH_A_NDP;
|
|
|
|
if (ohci->hcca)
|
|
return 0;
|
|
|
|
ohci->hcca = dma_alloc_coherent (hcd->self.controller,
|
|
sizeof *ohci->hcca, &ohci->hcca_dma, 0);
|
|
if (!ohci->hcca)
|
|
return -ENOMEM;
|
|
|
|
if ((ret = ohci_mem_init (ohci)) < 0)
|
|
ohci_stop (hcd);
|
|
else {
|
|
create_debug_files (ohci);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* Start an OHCI controller, set the BUS operational
|
|
* resets USB and controller
|
|
* enable interrupts
|
|
*/
|
|
static int ohci_run (struct ohci_hcd *ohci)
|
|
{
|
|
u32 mask, val;
|
|
int first = ohci->fminterval == 0;
|
|
struct usb_hcd *hcd = ohci_to_hcd(ohci);
|
|
|
|
disable (ohci);
|
|
|
|
/* boot firmware should have set this up (5.1.1.3.1) */
|
|
if (first) {
|
|
|
|
val = ohci_readl (ohci, &ohci->regs->fminterval);
|
|
ohci->fminterval = val & 0x3fff;
|
|
if (ohci->fminterval != FI)
|
|
ohci_dbg (ohci, "fminterval delta %d\n",
|
|
ohci->fminterval - FI);
|
|
ohci->fminterval |= FSMP (ohci->fminterval) << 16;
|
|
/* also: power/overcurrent flags in roothub.a */
|
|
}
|
|
|
|
/* Reset USB nearly "by the book". RemoteWakeupConnected has
|
|
* to be checked in case boot firmware (BIOS/SMM/...) has set up
|
|
* wakeup in a way the bus isn't aware of (e.g., legacy PCI PM).
|
|
* If the bus glue detected wakeup capability then it should
|
|
* already be enabled; if so we'll just enable it again.
|
|
*/
|
|
if ((ohci->hc_control & OHCI_CTRL_RWC) != 0)
|
|
device_set_wakeup_capable(hcd->self.controller, 1);
|
|
|
|
switch (ohci->hc_control & OHCI_CTRL_HCFS) {
|
|
case OHCI_USB_OPER:
|
|
val = 0;
|
|
break;
|
|
case OHCI_USB_SUSPEND:
|
|
case OHCI_USB_RESUME:
|
|
ohci->hc_control &= OHCI_CTRL_RWC;
|
|
ohci->hc_control |= OHCI_USB_RESUME;
|
|
val = 10 /* msec wait */;
|
|
break;
|
|
// case OHCI_USB_RESET:
|
|
default:
|
|
ohci->hc_control &= OHCI_CTRL_RWC;
|
|
ohci->hc_control |= OHCI_USB_RESET;
|
|
val = 50 /* msec wait */;
|
|
break;
|
|
}
|
|
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
|
|
// flush the writes
|
|
(void) ohci_readl (ohci, &ohci->regs->control);
|
|
msleep(val);
|
|
|
|
memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
|
|
|
|
/* 2msec timelimit here means no irqs/preempt */
|
|
spin_lock_irq (&ohci->lock);
|
|
|
|
retry:
|
|
/* HC Reset requires max 10 us delay */
|
|
ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus);
|
|
val = 30; /* ... allow extra time */
|
|
while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
|
|
if (--val == 0) {
|
|
spin_unlock_irq (&ohci->lock);
|
|
ohci_err (ohci, "USB HC reset timed out!\n");
|
|
return -1;
|
|
}
|
|
udelay (1);
|
|
}
|
|
|
|
/* now we're in the SUSPEND state ... must go OPERATIONAL
|
|
* within 2msec else HC enters RESUME
|
|
*
|
|
* ... but some hardware won't init fmInterval "by the book"
|
|
* (SiS, OPTi ...), so reset again instead. SiS doesn't need
|
|
* this if we write fmInterval after we're OPERATIONAL.
|
|
* Unclear about ALi, ServerWorks, and others ... this could
|
|
* easily be a longstanding bug in chip init on Linux.
|
|
*/
|
|
if (ohci->flags & OHCI_QUIRK_INITRESET) {
|
|
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
|
|
// flush those writes
|
|
(void) ohci_readl (ohci, &ohci->regs->control);
|
|
}
|
|
|
|
/* Tell the controller where the control and bulk lists are
|
|
* The lists are empty now. */
|
|
ohci_writel (ohci, 0, &ohci->regs->ed_controlhead);
|
|
ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead);
|
|
|
|
/* a reset clears this */
|
|
ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca);
|
|
|
|
periodic_reinit (ohci);
|
|
|
|
/* some OHCI implementations are finicky about how they init.
|
|
* bogus values here mean not even enumeration could work.
|
|
*/
|
|
if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0
|
|
|| !ohci_readl (ohci, &ohci->regs->periodicstart)) {
|
|
if (!(ohci->flags & OHCI_QUIRK_INITRESET)) {
|
|
ohci->flags |= OHCI_QUIRK_INITRESET;
|
|
ohci_dbg (ohci, "enabling initreset quirk\n");
|
|
goto retry;
|
|
}
|
|
spin_unlock_irq (&ohci->lock);
|
|
ohci_err (ohci, "init err (%08x %04x)\n",
|
|
ohci_readl (ohci, &ohci->regs->fminterval),
|
|
ohci_readl (ohci, &ohci->regs->periodicstart));
|
|
return -EOVERFLOW;
|
|
}
|
|
|
|
/* use rhsc irqs after khubd is fully initialized */
|
|
hcd->poll_rh = 1;
|
|
hcd->uses_new_polling = 1;
|
|
|
|
/* start controller operations */
|
|
ohci->hc_control &= OHCI_CTRL_RWC;
|
|
ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
|
|
ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
|
|
hcd->state = HC_STATE_RUNNING;
|
|
|
|
/* wake on ConnectStatusChange, matching external hubs */
|
|
ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
|
|
|
|
/* Choose the interrupts we care about now, others later on demand */
|
|
mask = OHCI_INTR_INIT;
|
|
ohci_writel (ohci, ~0, &ohci->regs->intrstatus);
|
|
ohci_writel (ohci, mask, &ohci->regs->intrenable);
|
|
|
|
/* handle root hub init quirks ... */
|
|
val = roothub_a (ohci);
|
|
val &= ~(RH_A_PSM | RH_A_OCPM);
|
|
if (ohci->flags & OHCI_QUIRK_SUPERIO) {
|
|
/* NSC 87560 and maybe others */
|
|
val |= RH_A_NOCP;
|
|
val &= ~(RH_A_POTPGT | RH_A_NPS);
|
|
ohci_writel (ohci, val, &ohci->regs->roothub.a);
|
|
} else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
|
|
(ohci->flags & OHCI_QUIRK_HUB_POWER)) {
|
|
/* hub power always on; required for AMD-756 and some
|
|
* Mac platforms. ganged overcurrent reporting, if any.
|
|
*/
|
|
val |= RH_A_NPS;
|
|
ohci_writel (ohci, val, &ohci->regs->roothub.a);
|
|
}
|
|
ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
|
|
ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
|
|
&ohci->regs->roothub.b);
|
|
// flush those writes
|
|
(void) ohci_readl (ohci, &ohci->regs->control);
|
|
|
|
ohci->next_statechange = jiffies + STATECHANGE_DELAY;
|
|
spin_unlock_irq (&ohci->lock);
|
|
|
|
// POTPGT delay is bits 24-31, in 2 ms units.
|
|
mdelay ((val >> 23) & 0x1fe);
|
|
hcd->state = HC_STATE_RUNNING;
|
|
|
|
if (quirk_zfmicro(ohci)) {
|
|
/* Create timer to watch for bad queue state on ZF Micro */
|
|
setup_timer(&ohci->unlink_watchdog, unlink_watchdog_func,
|
|
(unsigned long) ohci);
|
|
|
|
ohci->eds_scheduled = 0;
|
|
ohci->ed_to_check = NULL;
|
|
}
|
|
|
|
ohci_dump (ohci, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* an interrupt happens */
|
|
|
|
static irqreturn_t ohci_irq (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
struct ohci_regs __iomem *regs = ohci->regs;
|
|
int ints;
|
|
|
|
/* Read interrupt status (and flush pending writes). We ignore the
|
|
* optimization of checking the LSB of hcca->done_head; it doesn't
|
|
* work on all systems (edge triggering for OHCI can be a factor).
|
|
*/
|
|
ints = ohci_readl(ohci, ®s->intrstatus);
|
|
|
|
/* Check for an all 1's result which is a typical consequence
|
|
* of dead, unclocked, or unplugged (CardBus...) devices
|
|
*/
|
|
if (ints == ~(u32)0) {
|
|
disable (ohci);
|
|
ohci_dbg (ohci, "device removed!\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* We only care about interrupts that are enabled */
|
|
ints &= ohci_readl(ohci, ®s->intrenable);
|
|
|
|
/* interrupt for some other device? */
|
|
if (ints == 0)
|
|
return IRQ_NOTMINE;
|
|
|
|
if (ints & OHCI_INTR_UE) {
|
|
// e.g. due to PCI Master/Target Abort
|
|
if (quirk_nec(ohci)) {
|
|
/* Workaround for a silicon bug in some NEC chips used
|
|
* in Apple's PowerBooks. Adapted from Darwin code.
|
|
*/
|
|
ohci_err (ohci, "OHCI Unrecoverable Error, scheduling NEC chip restart\n");
|
|
|
|
ohci_writel (ohci, OHCI_INTR_UE, ®s->intrdisable);
|
|
|
|
schedule_work (&ohci->nec_work);
|
|
} else {
|
|
disable (ohci);
|
|
ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
|
|
}
|
|
|
|
ohci_dump (ohci, 1);
|
|
ohci_usb_reset (ohci);
|
|
}
|
|
|
|
if (ints & OHCI_INTR_RHSC) {
|
|
ohci_vdbg(ohci, "rhsc\n");
|
|
ohci->next_statechange = jiffies + STATECHANGE_DELAY;
|
|
ohci_writel(ohci, OHCI_INTR_RD | OHCI_INTR_RHSC,
|
|
®s->intrstatus);
|
|
|
|
/* NOTE: Vendors didn't always make the same implementation
|
|
* choices for RHSC. Many followed the spec; RHSC triggers
|
|
* on an edge, like setting and maybe clearing a port status
|
|
* change bit. With others it's level-triggered, active
|
|
* until khubd clears all the port status change bits. We'll
|
|
* always disable it here and rely on polling until khubd
|
|
* re-enables it.
|
|
*/
|
|
ohci_writel(ohci, OHCI_INTR_RHSC, ®s->intrdisable);
|
|
usb_hcd_poll_rh_status(hcd);
|
|
}
|
|
|
|
/* For connect and disconnect events, we expect the controller
|
|
* to turn on RHSC along with RD. But for remote wakeup events
|
|
* this might not happen.
|
|
*/
|
|
else if (ints & OHCI_INTR_RD) {
|
|
ohci_vdbg(ohci, "resume detect\n");
|
|
ohci_writel(ohci, OHCI_INTR_RD, ®s->intrstatus);
|
|
hcd->poll_rh = 1;
|
|
if (ohci->autostop) {
|
|
spin_lock (&ohci->lock);
|
|
ohci_rh_resume (ohci);
|
|
spin_unlock (&ohci->lock);
|
|
} else
|
|
usb_hcd_resume_root_hub(hcd);
|
|
}
|
|
|
|
if (ints & OHCI_INTR_WDH) {
|
|
spin_lock (&ohci->lock);
|
|
dl_done_list (ohci);
|
|
spin_unlock (&ohci->lock);
|
|
}
|
|
|
|
if (quirk_zfmicro(ohci) && (ints & OHCI_INTR_SF)) {
|
|
spin_lock(&ohci->lock);
|
|
if (ohci->ed_to_check) {
|
|
struct ed *ed = ohci->ed_to_check;
|
|
|
|
if (check_ed(ohci, ed)) {
|
|
/* HC thinks the TD list is empty; HCD knows
|
|
* at least one TD is outstanding
|
|
*/
|
|
if (--ohci->zf_delay == 0) {
|
|
struct td *td = list_entry(
|
|
ed->td_list.next,
|
|
struct td, td_list);
|
|
ohci_warn(ohci,
|
|
"Reclaiming orphan TD %p\n",
|
|
td);
|
|
takeback_td(ohci, td);
|
|
ohci->ed_to_check = NULL;
|
|
}
|
|
} else
|
|
ohci->ed_to_check = NULL;
|
|
}
|
|
spin_unlock(&ohci->lock);
|
|
}
|
|
|
|
/* could track INTR_SO to reduce available PCI/... bandwidth */
|
|
|
|
/* handle any pending URB/ED unlinks, leaving INTR_SF enabled
|
|
* when there's still unlinking to be done (next frame).
|
|
*/
|
|
spin_lock (&ohci->lock);
|
|
if (ohci->ed_rm_list)
|
|
finish_unlinks (ohci, ohci_frame_no(ohci));
|
|
if ((ints & OHCI_INTR_SF) != 0
|
|
&& !ohci->ed_rm_list
|
|
&& !ohci->ed_to_check
|
|
&& HC_IS_RUNNING(hcd->state))
|
|
ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable);
|
|
spin_unlock (&ohci->lock);
|
|
|
|
if (HC_IS_RUNNING(hcd->state)) {
|
|
ohci_writel (ohci, ints, ®s->intrstatus);
|
|
ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable);
|
|
// flush those writes
|
|
(void) ohci_readl (ohci, &ohci->regs->control);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static void ohci_stop (struct usb_hcd *hcd)
|
|
{
|
|
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
|
|
|
ohci_dump (ohci, 1);
|
|
|
|
flush_scheduled_work();
|
|
|
|
ohci_usb_reset (ohci);
|
|
ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
|
|
free_irq(hcd->irq, hcd);
|
|
hcd->irq = -1;
|
|
|
|
if (quirk_zfmicro(ohci))
|
|
del_timer(&ohci->unlink_watchdog);
|
|
if (quirk_amdiso(ohci))
|
|
amd_iso_dev_put();
|
|
|
|
remove_debug_files (ohci);
|
|
ohci_mem_cleanup (ohci);
|
|
if (ohci->hcca) {
|
|
dma_free_coherent (hcd->self.controller,
|
|
sizeof *ohci->hcca,
|
|
ohci->hcca, ohci->hcca_dma);
|
|
ohci->hcca = NULL;
|
|
ohci->hcca_dma = 0;
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#if defined(CONFIG_PM) || defined(CONFIG_PCI)
|
|
|
|
/* must not be called from interrupt context */
|
|
static int ohci_restart (struct ohci_hcd *ohci)
|
|
{
|
|
int temp;
|
|
int i;
|
|
struct urb_priv *priv;
|
|
|
|
spin_lock_irq(&ohci->lock);
|
|
disable (ohci);
|
|
|
|
/* Recycle any "live" eds/tds (and urbs). */
|
|
if (!list_empty (&ohci->pending))
|
|
ohci_dbg(ohci, "abort schedule...\n");
|
|
list_for_each_entry (priv, &ohci->pending, pending) {
|
|
struct urb *urb = priv->td[0]->urb;
|
|
struct ed *ed = priv->ed;
|
|
|
|
switch (ed->state) {
|
|
case ED_OPER:
|
|
ed->state = ED_UNLINK;
|
|
ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE);
|
|
ed_deschedule (ohci, ed);
|
|
|
|
ed->ed_next = ohci->ed_rm_list;
|
|
ed->ed_prev = NULL;
|
|
ohci->ed_rm_list = ed;
|
|
/* FALLTHROUGH */
|
|
case ED_UNLINK:
|
|
break;
|
|
default:
|
|
ohci_dbg(ohci, "bogus ed %p state %d\n",
|
|
ed, ed->state);
|
|
}
|
|
|
|
if (!urb->unlinked)
|
|
urb->unlinked = -ESHUTDOWN;
|
|
}
|
|
finish_unlinks (ohci, 0);
|
|
spin_unlock_irq(&ohci->lock);
|
|
|
|
/* paranoia, in case that didn't work: */
|
|
|
|
/* empty the interrupt branches */
|
|
for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
|
|
for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
|
|
|
|
/* no EDs to remove */
|
|
ohci->ed_rm_list = NULL;
|
|
|
|
/* empty control and bulk lists */
|
|
ohci->ed_controltail = NULL;
|
|
ohci->ed_bulktail = NULL;
|
|
|
|
if ((temp = ohci_run (ohci)) < 0) {
|
|
ohci_err (ohci, "can't restart, %d\n", temp);
|
|
return temp;
|
|
}
|
|
ohci_dbg(ohci, "restart complete\n");
|
|
return 0;
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
MODULE_AUTHOR (DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE ("GPL");
|
|
|
|
#ifdef CONFIG_PCI
|
|
#include "ohci-pci.c"
|
|
#define PCI_DRIVER ohci_pci_driver
|
|
#endif
|
|
|
|
#if defined(CONFIG_ARCH_SA1100) && defined(CONFIG_SA1111)
|
|
#include "ohci-sa1111.c"
|
|
#define SA1111_DRIVER ohci_hcd_sa1111_driver
|
|
#endif
|
|
|
|
#if defined(CONFIG_ARCH_S3C2410) || defined(CONFIG_ARCH_S3C64XX)
|
|
#include "ohci-s3c2410.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_s3c2410_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_OMAP
|
|
#include "ohci-omap.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_omap_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_LH7A404
|
|
#include "ohci-lh7a404.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_lh7a404_driver
|
|
#endif
|
|
|
|
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
|
|
#include "ohci-pxa27x.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_pxa27x_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_EP93XX
|
|
#include "ohci-ep93xx.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_ep93xx_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_SOC_AU1X00
|
|
#include "ohci-au1xxx.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_au1xxx_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_PNX8550
|
|
#include "ohci-pnx8550.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_pnx8550_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_USB_OHCI_HCD_PPC_SOC
|
|
#include "ohci-ppc-soc.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_ppc_soc_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_AT91
|
|
#include "ohci-at91.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_at91_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_PNX4008
|
|
#include "ohci-pnx4008.c"
|
|
#define PLATFORM_DRIVER usb_hcd_pnx4008_driver
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7720) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7721) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7763) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7786)
|
|
#include "ohci-sh.c"
|
|
#define PLATFORM_DRIVER ohci_hcd_sh_driver
|
|
#endif
|
|
|
|
|
|
#ifdef CONFIG_USB_OHCI_HCD_PPC_OF
|
|
#include "ohci-ppc-of.c"
|
|
#define OF_PLATFORM_DRIVER ohci_hcd_ppc_of_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_PS3
|
|
#include "ohci-ps3.c"
|
|
#define PS3_SYSTEM_BUS_DRIVER ps3_ohci_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_USB_OHCI_HCD_SSB
|
|
#include "ohci-ssb.c"
|
|
#define SSB_OHCI_DRIVER ssb_ohci_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_MFD_SM501
|
|
#include "ohci-sm501.c"
|
|
#define SM501_OHCI_DRIVER ohci_hcd_sm501_driver
|
|
#endif
|
|
|
|
#ifdef CONFIG_MFD_TC6393XB
|
|
#include "ohci-tmio.c"
|
|
#define TMIO_OHCI_DRIVER ohci_hcd_tmio_driver
|
|
#endif
|
|
|
|
#if !defined(PCI_DRIVER) && \
|
|
!defined(PLATFORM_DRIVER) && \
|
|
!defined(OF_PLATFORM_DRIVER) && \
|
|
!defined(SA1111_DRIVER) && \
|
|
!defined(PS3_SYSTEM_BUS_DRIVER) && \
|
|
!defined(SM501_OHCI_DRIVER) && \
|
|
!defined(TMIO_OHCI_DRIVER) && \
|
|
!defined(SSB_OHCI_DRIVER)
|
|
#error "missing bus glue for ohci-hcd"
|
|
#endif
|
|
|
|
static int __init ohci_hcd_mod_init(void)
|
|
{
|
|
int retval = 0;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
printk(KERN_INFO "%s: " DRIVER_DESC "\n", hcd_name);
|
|
pr_debug ("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
|
|
sizeof (struct ed), sizeof (struct td));
|
|
set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
|
|
|
|
#ifdef DEBUG
|
|
ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
|
|
if (!ohci_debug_root) {
|
|
retval = -ENOENT;
|
|
goto error_debug;
|
|
}
|
|
#endif
|
|
|
|
#ifdef PS3_SYSTEM_BUS_DRIVER
|
|
retval = ps3_ohci_driver_register(&PS3_SYSTEM_BUS_DRIVER);
|
|
if (retval < 0)
|
|
goto error_ps3;
|
|
#endif
|
|
|
|
#ifdef PLATFORM_DRIVER
|
|
retval = platform_driver_register(&PLATFORM_DRIVER);
|
|
if (retval < 0)
|
|
goto error_platform;
|
|
#endif
|
|
|
|
#ifdef OF_PLATFORM_DRIVER
|
|
retval = of_register_platform_driver(&OF_PLATFORM_DRIVER);
|
|
if (retval < 0)
|
|
goto error_of_platform;
|
|
#endif
|
|
|
|
#ifdef SA1111_DRIVER
|
|
retval = sa1111_driver_register(&SA1111_DRIVER);
|
|
if (retval < 0)
|
|
goto error_sa1111;
|
|
#endif
|
|
|
|
#ifdef PCI_DRIVER
|
|
retval = pci_register_driver(&PCI_DRIVER);
|
|
if (retval < 0)
|
|
goto error_pci;
|
|
#endif
|
|
|
|
#ifdef SSB_OHCI_DRIVER
|
|
retval = ssb_driver_register(&SSB_OHCI_DRIVER);
|
|
if (retval)
|
|
goto error_ssb;
|
|
#endif
|
|
|
|
#ifdef SM501_OHCI_DRIVER
|
|
retval = platform_driver_register(&SM501_OHCI_DRIVER);
|
|
if (retval < 0)
|
|
goto error_sm501;
|
|
#endif
|
|
|
|
#ifdef TMIO_OHCI_DRIVER
|
|
retval = platform_driver_register(&TMIO_OHCI_DRIVER);
|
|
if (retval < 0)
|
|
goto error_tmio;
|
|
#endif
|
|
|
|
return retval;
|
|
|
|
/* Error path */
|
|
#ifdef TMIO_OHCI_DRIVER
|
|
platform_driver_unregister(&TMIO_OHCI_DRIVER);
|
|
error_tmio:
|
|
#endif
|
|
#ifdef SM501_OHCI_DRIVER
|
|
platform_driver_unregister(&SM501_OHCI_DRIVER);
|
|
error_sm501:
|
|
#endif
|
|
#ifdef SSB_OHCI_DRIVER
|
|
ssb_driver_unregister(&SSB_OHCI_DRIVER);
|
|
error_ssb:
|
|
#endif
|
|
#ifdef PCI_DRIVER
|
|
pci_unregister_driver(&PCI_DRIVER);
|
|
error_pci:
|
|
#endif
|
|
#ifdef SA1111_DRIVER
|
|
sa1111_driver_unregister(&SA1111_DRIVER);
|
|
error_sa1111:
|
|
#endif
|
|
#ifdef OF_PLATFORM_DRIVER
|
|
of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
|
|
error_of_platform:
|
|
#endif
|
|
#ifdef PLATFORM_DRIVER
|
|
platform_driver_unregister(&PLATFORM_DRIVER);
|
|
error_platform:
|
|
#endif
|
|
#ifdef PS3_SYSTEM_BUS_DRIVER
|
|
ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
|
|
error_ps3:
|
|
#endif
|
|
#ifdef DEBUG
|
|
debugfs_remove(ohci_debug_root);
|
|
ohci_debug_root = NULL;
|
|
error_debug:
|
|
#endif
|
|
|
|
clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
|
|
return retval;
|
|
}
|
|
module_init(ohci_hcd_mod_init);
|
|
|
|
static void __exit ohci_hcd_mod_exit(void)
|
|
{
|
|
#ifdef TMIO_OHCI_DRIVER
|
|
platform_driver_unregister(&TMIO_OHCI_DRIVER);
|
|
#endif
|
|
#ifdef SM501_OHCI_DRIVER
|
|
platform_driver_unregister(&SM501_OHCI_DRIVER);
|
|
#endif
|
|
#ifdef SSB_OHCI_DRIVER
|
|
ssb_driver_unregister(&SSB_OHCI_DRIVER);
|
|
#endif
|
|
#ifdef PCI_DRIVER
|
|
pci_unregister_driver(&PCI_DRIVER);
|
|
#endif
|
|
#ifdef SA1111_DRIVER
|
|
sa1111_driver_unregister(&SA1111_DRIVER);
|
|
#endif
|
|
#ifdef OF_PLATFORM_DRIVER
|
|
of_unregister_platform_driver(&OF_PLATFORM_DRIVER);
|
|
#endif
|
|
#ifdef PLATFORM_DRIVER
|
|
platform_driver_unregister(&PLATFORM_DRIVER);
|
|
#endif
|
|
#ifdef PS3_SYSTEM_BUS_DRIVER
|
|
ps3_ohci_driver_unregister(&PS3_SYSTEM_BUS_DRIVER);
|
|
#endif
|
|
#ifdef DEBUG
|
|
debugfs_remove(ohci_debug_root);
|
|
#endif
|
|
clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
|
|
}
|
|
module_exit(ohci_hcd_mod_exit);
|
|
|