forked from Minki/linux
1996e6c572
This patch (as1556) works around a bug in the Philips ISP1562 EHCI controller. Although the controller claims to support frame-list lengths smaller than the default of 1024 for its periodic schedule, in fact smaller values don't work. A new quirk flag is added to indicate when the bug is present, and if it is then the schedule size is left at the default value. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
572 lines
16 KiB
C
572 lines
16 KiB
C
/*
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* EHCI HCD (Host Controller Driver) PCI Bus Glue.
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*
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* Copyright (c) 2000-2004 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef CONFIG_PCI
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#error "This file is PCI bus glue. CONFIG_PCI must be defined."
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#endif
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/* defined here to avoid adding to pci_ids.h for single instance use */
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#define PCI_DEVICE_ID_INTEL_CE4100_USB 0x2e70
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/*-------------------------------------------------------------------------*/
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/* called after powerup, by probe or system-pm "wakeup" */
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static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
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{
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int retval;
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/* we expect static quirk code to handle the "extended capabilities"
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* (currently just BIOS handoff) allowed starting with EHCI 0.96
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*/
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/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
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retval = pci_set_mwi(pdev);
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if (!retval)
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ehci_dbg(ehci, "MWI active\n");
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return 0;
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}
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/* called during probe() after chip reset completes */
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static int ehci_pci_setup(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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struct pci_dev *p_smbus;
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u8 rev;
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u32 temp;
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int retval;
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switch (pdev->vendor) {
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case PCI_VENDOR_ID_TOSHIBA_2:
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/* celleb's companion chip */
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if (pdev->device == 0x01b5) {
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#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
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ehci->big_endian_mmio = 1;
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#else
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ehci_warn(ehci,
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"unsupported big endian Toshiba quirk\n");
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#endif
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}
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break;
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}
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ehci->caps = hcd->regs;
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ehci->regs = hcd->regs +
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HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
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dbg_hcs_params(ehci, "reset");
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dbg_hcc_params(ehci, "reset");
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/* ehci_init() causes memory for DMA transfers to be
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* allocated. Thus, any vendor-specific workarounds based on
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* limiting the type of memory used for DMA transfers must
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* happen before ehci_init() is called. */
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switch (pdev->vendor) {
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case PCI_VENDOR_ID_NVIDIA:
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/* NVidia reports that certain chips don't handle
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* QH, ITD, or SITD addresses above 2GB. (But TD,
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* data buffer, and periodic schedule are normal.)
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*/
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switch (pdev->device) {
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case 0x003c: /* MCP04 */
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case 0x005b: /* CK804 */
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case 0x00d8: /* CK8 */
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case 0x00e8: /* CK8S */
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if (pci_set_consistent_dma_mask(pdev,
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DMA_BIT_MASK(31)) < 0)
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ehci_warn(ehci, "can't enable NVidia "
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"workaround for >2GB RAM\n");
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break;
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}
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break;
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case PCI_VENDOR_ID_PHILIPS:
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/*
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* Philips controllers set HCC_PGM_FRAMELISTLEN, but
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* they don't implement schedule sizes shorter than 1024.
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*/
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ehci->sched_size_bug = 1;
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}
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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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if ((pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x7808) ||
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(pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x4396)) {
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/* EHCI controller on AMD SB700/SB800/Hudson-2/3 platforms may
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* read/write memory space which does not belong to it when
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* there is NULL pointer with T-bit set to 1 in the frame list
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* table. To avoid the issue, the frame list link pointer
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* should always contain a valid pointer to a inactive qh.
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*/
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ehci->use_dummy_qh = 1;
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ehci_info(ehci, "applying AMD SB700/SB800/Hudson-2/3 EHCI "
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"dummy qh workaround\n");
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}
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/* data structure init */
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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switch (pdev->vendor) {
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case PCI_VENDOR_ID_NEC:
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ehci->need_io_watchdog = 0;
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break;
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case PCI_VENDOR_ID_INTEL:
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ehci->need_io_watchdog = 0;
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ehci->fs_i_thresh = 1;
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if (pdev->device == 0x27cc) {
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ehci->broken_periodic = 1;
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ehci_info(ehci, "using broken periodic workaround\n");
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}
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if (pdev->device == 0x0806 || pdev->device == 0x0811
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|| pdev->device == 0x0829) {
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ehci_info(ehci, "disable lpm for langwell/penwell\n");
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ehci->has_lpm = 0;
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}
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if (pdev->device == PCI_DEVICE_ID_INTEL_CE4100_USB) {
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hcd->has_tt = 1;
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tdi_reset(ehci);
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}
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if (pdev->subsystem_vendor == PCI_VENDOR_ID_ASUSTEK) {
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/* EHCI #1 or #2 on 6 Series/C200 Series chipset */
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if (pdev->device == 0x1c26 || pdev->device == 0x1c2d) {
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ehci_info(ehci, "broken D3 during system sleep on ASUS\n");
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hcd->broken_pci_sleep = 1;
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device_set_wakeup_capable(&pdev->dev, false);
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}
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}
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break;
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case PCI_VENDOR_ID_TDI:
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if (pdev->device == PCI_DEVICE_ID_TDI_EHCI) {
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hcd->has_tt = 1;
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tdi_reset(ehci);
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}
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break;
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case PCI_VENDOR_ID_AMD:
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/* AMD PLL quirk */
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if (usb_amd_find_chipset_info())
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ehci->amd_pll_fix = 1;
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/* AMD8111 EHCI doesn't work, according to AMD errata */
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if (pdev->device == 0x7463) {
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ehci_info(ehci, "ignoring AMD8111 (errata)\n");
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retval = -EIO;
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goto done;
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}
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break;
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case PCI_VENDOR_ID_NVIDIA:
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switch (pdev->device) {
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/* Some NForce2 chips have problems with selective suspend;
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* fixed in newer silicon.
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*/
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case 0x0068:
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if (pdev->revision < 0xa4)
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ehci->no_selective_suspend = 1;
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break;
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/* MCP89 chips on the MacBookAir3,1 give EPROTO when
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* fetching device descriptors unless LPM is disabled.
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* There are also intermittent problems enumerating
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* devices with PPCD enabled.
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*/
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case 0x0d9d:
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ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89");
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ehci->has_lpm = 0;
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ehci->has_ppcd = 0;
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ehci->command &= ~CMD_PPCEE;
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break;
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}
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break;
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case PCI_VENDOR_ID_VIA:
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if (pdev->device == 0x3104 && (pdev->revision & 0xf0) == 0x60) {
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u8 tmp;
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/* The VT6212 defaults to a 1 usec EHCI sleep time which
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* hogs the PCI bus *badly*. Setting bit 5 of 0x4B makes
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* that sleep time use the conventional 10 usec.
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*/
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pci_read_config_byte(pdev, 0x4b, &tmp);
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if (tmp & 0x20)
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break;
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pci_write_config_byte(pdev, 0x4b, tmp | 0x20);
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}
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break;
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case PCI_VENDOR_ID_ATI:
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/* AMD PLL quirk */
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if (usb_amd_find_chipset_info())
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ehci->amd_pll_fix = 1;
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/* SB600 and old version of SB700 have a bug in EHCI controller,
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* which causes usb devices lose response in some cases.
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*/
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if ((pdev->device == 0x4386) || (pdev->device == 0x4396)) {
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p_smbus = pci_get_device(PCI_VENDOR_ID_ATI,
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PCI_DEVICE_ID_ATI_SBX00_SMBUS,
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NULL);
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if (!p_smbus)
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break;
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rev = p_smbus->revision;
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if ((pdev->device == 0x4386) || (rev == 0x3a)
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|| (rev == 0x3b)) {
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u8 tmp;
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ehci_info(ehci, "applying AMD SB600/SB700 USB "
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"freeze workaround\n");
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pci_read_config_byte(pdev, 0x53, &tmp);
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pci_write_config_byte(pdev, 0x53, tmp | (1<<3));
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}
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pci_dev_put(p_smbus);
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}
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break;
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case PCI_VENDOR_ID_NETMOS:
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/* MosChip frame-index-register bug */
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ehci_info(ehci, "applying MosChip frame-index workaround\n");
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ehci->frame_index_bug = 1;
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break;
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}
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/* optional debug port, normally in the first BAR */
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temp = pci_find_capability(pdev, 0x0a);
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if (temp) {
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pci_read_config_dword(pdev, temp, &temp);
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temp >>= 16;
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if ((temp & (3 << 13)) == (1 << 13)) {
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temp &= 0x1fff;
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ehci->debug = ehci_to_hcd(ehci)->regs + temp;
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temp = ehci_readl(ehci, &ehci->debug->control);
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ehci_info(ehci, "debug port %d%s\n",
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HCS_DEBUG_PORT(ehci->hcs_params),
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(temp & DBGP_ENABLED)
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? " IN USE"
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: "");
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if (!(temp & DBGP_ENABLED))
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ehci->debug = NULL;
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}
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}
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ehci_reset(ehci);
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/* at least the Genesys GL880S needs fixup here */
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temp = HCS_N_CC(ehci->hcs_params) * HCS_N_PCC(ehci->hcs_params);
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temp &= 0x0f;
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if (temp && HCS_N_PORTS(ehci->hcs_params) > temp) {
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ehci_dbg(ehci, "bogus port configuration: "
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"cc=%d x pcc=%d < ports=%d\n",
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HCS_N_CC(ehci->hcs_params),
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HCS_N_PCC(ehci->hcs_params),
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HCS_N_PORTS(ehci->hcs_params));
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switch (pdev->vendor) {
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case 0x17a0: /* GENESYS */
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/* GL880S: should be PORTS=2 */
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temp |= (ehci->hcs_params & ~0xf);
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ehci->hcs_params = temp;
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break;
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case PCI_VENDOR_ID_NVIDIA:
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/* NF4: should be PCC=10 */
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break;
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}
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}
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/* Serial Bus Release Number is at PCI 0x60 offset */
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pci_read_config_byte(pdev, 0x60, &ehci->sbrn);
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if (pdev->vendor == PCI_VENDOR_ID_STMICRO
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&& pdev->device == PCI_DEVICE_ID_STMICRO_USB_HOST)
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ehci->sbrn = 0x20; /* ConneXT has no sbrn register */
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/* Keep this around for a while just in case some EHCI
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* implementation uses legacy PCI PM support. This test
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* can be removed on 17 Dec 2009 if the dev_warn() hasn't
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* been triggered by then.
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*/
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if (!device_can_wakeup(&pdev->dev)) {
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u16 port_wake;
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pci_read_config_word(pdev, 0x62, &port_wake);
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if (port_wake & 0x0001) {
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dev_warn(&pdev->dev, "Enabling legacy PCI PM\n");
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device_set_wakeup_capable(&pdev->dev, 1);
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}
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}
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#ifdef CONFIG_USB_SUSPEND
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/* REVISIT: the controller works fine for wakeup iff the root hub
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* itself is "globally" suspended, but usbcore currently doesn't
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* understand such things.
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*
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* System suspend currently expects to be able to suspend the entire
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* device tree, device-at-a-time. If we failed selective suspend
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* reports, system suspend would fail; so the root hub code must claim
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* success. That's lying to usbcore, and it matters for runtime
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* PM scenarios with selective suspend and remote wakeup...
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*/
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if (ehci->no_selective_suspend && device_can_wakeup(&pdev->dev))
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ehci_warn(ehci, "selective suspend/wakeup unavailable\n");
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#endif
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ehci_port_power(ehci, 1);
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retval = ehci_pci_reinit(ehci, pdev);
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done:
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return retval;
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}
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_PM
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/* suspend/resume, section 4.3 */
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/* These routines rely on the PCI bus glue
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* to handle powerdown and wakeup, and currently also on
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* transceivers that don't need any software attention to set up
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* the right sort of wakeup.
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* Also they depend on separate root hub suspend/resume.
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*/
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static int ehci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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unsigned long flags;
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int rc = 0;
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if (time_before(jiffies, ehci->next_statechange))
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msleep(10);
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/* Root hub was already suspended. Disable irq emission and
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* mark HW unaccessible. The PM and USB cores make sure that
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* the root hub is either suspended or stopped.
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*/
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ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup);
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spin_lock_irqsave (&ehci->lock, flags);
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ehci_writel(ehci, 0, &ehci->regs->intr_enable);
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(void)ehci_readl(ehci, &ehci->regs->intr_enable);
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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spin_unlock_irqrestore (&ehci->lock, flags);
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// could save FLADJ in case of Vaux power loss
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// ... we'd only use it to handle clock skew
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return rc;
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}
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static bool usb_is_intel_switchable_ehci(struct pci_dev *pdev)
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{
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return pdev->class == PCI_CLASS_SERIAL_USB_EHCI &&
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pdev->vendor == PCI_VENDOR_ID_INTEL &&
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(pdev->device == 0x1E26 ||
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pdev->device == 0x8C2D ||
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pdev->device == 0x8C26);
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}
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static void ehci_enable_xhci_companion(void)
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{
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struct pci_dev *companion = NULL;
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/* The xHCI and EHCI controllers are not on the same PCI slot */
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for_each_pci_dev(companion) {
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if (!usb_is_intel_switchable_xhci(companion))
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continue;
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usb_enable_xhci_ports(companion);
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return;
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}
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}
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static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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/* The BIOS on systems with the Intel Panther Point chipset may or may
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* not support xHCI natively. That means that during system resume, it
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* may switch the ports back to EHCI so that users can use their
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* keyboard to select a kernel from GRUB after resume from hibernate.
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*
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* The BIOS is supposed to remember whether the OS had xHCI ports
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* enabled before resume, and switch the ports back to xHCI when the
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* BIOS/OS semaphore is written, but we all know we can't trust BIOS
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* writers.
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*
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* Unconditionally switch the ports back to xHCI after a system resume.
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* We can't tell whether the EHCI or xHCI controller will be resumed
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* first, so we have to do the port switchover in both drivers. Writing
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* a '1' to the port switchover registers should have no effect if the
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* port was already switched over.
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*/
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if (usb_is_intel_switchable_ehci(pdev))
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ehci_enable_xhci_companion();
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// maybe restore FLADJ
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if (time_before(jiffies, ehci->next_statechange))
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msleep(100);
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/* Mark hardware accessible again as we are out of D3 state by now */
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set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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/* If CF is still set and we aren't resuming from hibernation
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* then we maintained PCI Vaux power.
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* Just undo the effect of ehci_pci_suspend().
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*/
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if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
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!hibernated) {
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int mask = INTR_MASK;
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ehci_prepare_ports_for_controller_resume(ehci);
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if (!hcd->self.root_hub->do_remote_wakeup)
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mask &= ~STS_PCD;
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ehci_writel(ehci, mask, &ehci->regs->intr_enable);
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ehci_readl(ehci, &ehci->regs->intr_enable);
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return 0;
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}
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usb_root_hub_lost_power(hcd->self.root_hub);
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/* Else reset, to cope with power loss or flush-to-storage
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* style "resume" having let BIOS kick in during reboot.
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*/
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(void) ehci_halt(ehci);
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(void) ehci_reset(ehci);
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(void) ehci_pci_reinit(ehci, pdev);
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/* emptying the schedule aborts any urbs */
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spin_lock_irq(&ehci->lock);
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if (ehci->reclaim)
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end_unlink_async(ehci);
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ehci_work(ehci);
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spin_unlock_irq(&ehci->lock);
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ehci_writel(ehci, ehci->command, &ehci->regs->command);
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ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
|
|
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
|
|
|
|
/* here we "know" root ports should always stay powered */
|
|
ehci_port_power(ehci, 1);
|
|
|
|
ehci->rh_state = EHCI_RH_SUSPENDED;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int ehci_update_device(struct usb_hcd *hcd, struct usb_device *udev)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
int rc = 0;
|
|
|
|
if (!udev->parent) /* udev is root hub itself, impossible */
|
|
rc = -1;
|
|
/* we only support lpm device connected to root hub yet */
|
|
if (ehci->has_lpm && !udev->parent->parent) {
|
|
rc = ehci_lpm_set_da(ehci, udev->devnum, udev->portnum);
|
|
if (!rc)
|
|
rc = ehci_lpm_check(ehci, udev->portnum);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static const struct hc_driver ehci_pci_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "EHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ehci_pci_setup,
|
|
.start = ehci_run,
|
|
#ifdef CONFIG_PM
|
|
.pci_suspend = ehci_pci_suspend,
|
|
.pci_resume = ehci_pci_resume,
|
|
#endif
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
.endpoint_reset = ehci_endpoint_reset,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ehci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = ehci_hub_control,
|
|
.bus_suspend = ehci_bus_suspend,
|
|
.bus_resume = ehci_bus_resume,
|
|
.relinquish_port = ehci_relinquish_port,
|
|
.port_handed_over = ehci_port_handed_over,
|
|
|
|
/*
|
|
* call back when device connected and addressed
|
|
*/
|
|
.update_device = ehci_update_device,
|
|
|
|
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* PCI driver selection metadata; PCI hotplugging uses this */
|
|
static const struct pci_device_id pci_ids [] = { {
|
|
/* handle any USB 2.0 EHCI controller */
|
|
PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_EHCI, ~0),
|
|
.driver_data = (unsigned long) &ehci_pci_hc_driver,
|
|
}, {
|
|
PCI_VDEVICE(STMICRO, PCI_DEVICE_ID_STMICRO_USB_HOST),
|
|
.driver_data = (unsigned long) &ehci_pci_hc_driver,
|
|
},
|
|
{ /* end: all zeroes */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, pci_ids);
|
|
|
|
/* pci driver glue; this is a "new style" PCI driver module */
|
|
static struct pci_driver ehci_pci_driver = {
|
|
.name = (char *) hcd_name,
|
|
.id_table = pci_ids,
|
|
|
|
.probe = usb_hcd_pci_probe,
|
|
.remove = usb_hcd_pci_remove,
|
|
.shutdown = usb_hcd_pci_shutdown,
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
.driver = {
|
|
.pm = &usb_hcd_pci_pm_ops
|
|
},
|
|
#endif
|
|
};
|