516 lines
13 KiB
C
516 lines
13 KiB
C
/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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*
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* [ 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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* PCI Bus Glue
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*
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* This file is licenced under the GPL.
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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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#include <linux/pci.h>
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#include <linux/io.h>
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/* constants used to work around PM-related transfer
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* glitches in some AMD 700 series southbridges
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*/
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#define AB_REG_BAR 0xf0
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#define AB_INDX(addr) ((addr) + 0x00)
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#define AB_DATA(addr) ((addr) + 0x04)
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#define AX_INDXC 0X30
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#define AX_DATAC 0x34
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#define NB_PCIE_INDX_ADDR 0xe0
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#define NB_PCIE_INDX_DATA 0xe4
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#define PCIE_P_CNTL 0x10040
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#define BIF_NB 0x10002
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static struct pci_dev *amd_smbus_dev;
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static struct pci_dev *amd_hb_dev;
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static int amd_ohci_iso_count;
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/*-------------------------------------------------------------------------*/
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static int broken_suspend(struct usb_hcd *hcd)
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{
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device_init_wakeup(&hcd->self.root_hub->dev, 0);
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return 0;
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}
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/* AMD 756, for most chips (early revs), corrupts register
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* values on read ... so enable the vendor workaround.
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*/
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static int ohci_quirk_amd756(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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ohci->flags = OHCI_QUIRK_AMD756;
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ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
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/* also erratum 10 (suspend/resume issues) */
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return broken_suspend(hcd);
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}
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/* Apple's OHCI driver has a lot of bizarre workarounds
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* for this chip. Evidently control and bulk lists
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* can get confused. (B&W G3 models, and ...)
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*/
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static int ohci_quirk_opti(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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ohci_dbg (ohci, "WARNING: OPTi workarounds unavailable\n");
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return 0;
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}
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/* Check for NSC87560. We have to look at the bridge (fn1) to
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* identify the USB (fn2). This quirk might apply to more or
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* even all NSC stuff.
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*/
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static int ohci_quirk_ns(struct usb_hcd *hcd)
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{
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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struct pci_dev *b;
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b = pci_get_slot (pdev->bus, PCI_DEVFN (PCI_SLOT (pdev->devfn), 1));
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if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
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&& b->vendor == PCI_VENDOR_ID_NS) {
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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ohci->flags |= OHCI_QUIRK_SUPERIO;
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ohci_dbg (ohci, "Using NSC SuperIO setup\n");
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}
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pci_dev_put(b);
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return 0;
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}
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/* Check for Compaq's ZFMicro chipset, which needs short
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* delays before control or bulk queues get re-activated
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* in finish_unlinks()
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*/
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static int ohci_quirk_zfmicro(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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ohci->flags |= OHCI_QUIRK_ZFMICRO;
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ohci_dbg(ohci, "enabled Compaq ZFMicro chipset quirks\n");
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return 0;
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}
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/* Check for Toshiba SCC OHCI which has big endian registers
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* and little endian in memory data structures
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*/
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static int ohci_quirk_toshiba_scc(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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/* That chip is only present in the southbridge of some
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* cell based platforms which are supposed to select
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* CONFIG_USB_OHCI_BIG_ENDIAN_MMIO. We verify here if
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* that was the case though.
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*/
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#ifdef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
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ohci->flags |= OHCI_QUIRK_BE_MMIO;
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ohci_dbg (ohci, "enabled big endian Toshiba quirk\n");
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return 0;
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#else
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ohci_err (ohci, "unsupported big endian Toshiba quirk\n");
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return -ENXIO;
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#endif
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}
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/* Check for NEC chip and apply quirk for allegedly lost interrupts.
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*/
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static void ohci_quirk_nec_worker(struct work_struct *work)
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{
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struct ohci_hcd *ohci = container_of(work, struct ohci_hcd, nec_work);
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int status;
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status = ohci_init(ohci);
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if (status != 0) {
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ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
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"ohci_init", status);
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return;
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}
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status = ohci_restart(ohci);
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if (status != 0)
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ohci_err(ohci, "Restarting NEC controller failed in %s, %d\n",
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"ohci_restart", status);
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}
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static int ohci_quirk_nec(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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ohci->flags |= OHCI_QUIRK_NEC;
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INIT_WORK(&ohci->nec_work, ohci_quirk_nec_worker);
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ohci_dbg (ohci, "enabled NEC chipset lost interrupt quirk\n");
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return 0;
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}
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static int ohci_quirk_amd700(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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u8 rev = 0;
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if (!amd_smbus_dev)
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amd_smbus_dev = pci_get_device(PCI_VENDOR_ID_ATI,
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PCI_DEVICE_ID_ATI_SBX00_SMBUS, NULL);
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if (!amd_smbus_dev)
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return 0;
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pci_read_config_byte(amd_smbus_dev, PCI_REVISION_ID, &rev);
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/* SB800 needs pre-fetch fix */
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if ((rev >= 0x40) && (rev <= 0x4f)) {
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ohci->flags |= OHCI_QUIRK_AMD_PREFETCH;
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ohci_dbg(ohci, "enabled AMD prefetch quirk\n");
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}
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if ((rev > 0x3b) || (rev < 0x30)) {
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pci_dev_put(amd_smbus_dev);
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amd_smbus_dev = NULL;
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return 0;
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}
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amd_ohci_iso_count++;
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if (!amd_hb_dev)
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amd_hb_dev = pci_get_device(PCI_VENDOR_ID_AMD, 0x9600, NULL);
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ohci->flags |= OHCI_QUIRK_AMD_ISO;
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ohci_dbg(ohci, "enabled AMD ISO transfers quirk\n");
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return 0;
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}
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/*
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* The hardware normally enables the A-link power management feature, which
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* lets the system lower the power consumption in idle states.
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*
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* Assume the system is configured to have USB 1.1 ISO transfers going
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* to or from a USB device. Without this quirk, that stream may stutter
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* or have breaks occasionally. For transfers going to speakers, this
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* makes a very audible mess...
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*
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* That audio playback corruption is due to the audio stream getting
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* interrupted occasionally when the link goes in lower power state
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* This USB quirk prevents the link going into that lower power state
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* during audio playback or other ISO operations.
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*/
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static void quirk_amd_pll(int on)
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{
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u32 addr;
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u32 val;
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u32 bit = (on > 0) ? 1 : 0;
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pci_read_config_dword(amd_smbus_dev, AB_REG_BAR, &addr);
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/* BIT names/meanings are NDA-protected, sorry ... */
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outl(AX_INDXC, AB_INDX(addr));
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outl(0x40, AB_DATA(addr));
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outl(AX_DATAC, AB_INDX(addr));
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val = inl(AB_DATA(addr));
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val &= ~((1 << 3) | (1 << 4) | (1 << 9));
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val |= (bit << 3) | ((!bit) << 4) | ((!bit) << 9);
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outl(val, AB_DATA(addr));
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if (amd_hb_dev) {
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addr = PCIE_P_CNTL;
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pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);
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pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
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val &= ~(1 | (1 << 3) | (1 << 4) | (1 << 9) | (1 << 12));
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val |= bit | (bit << 3) | (bit << 12);
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val |= ((!bit) << 4) | ((!bit) << 9);
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pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);
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addr = BIF_NB;
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pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_ADDR, addr);
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pci_read_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, &val);
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val &= ~(1 << 8);
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val |= bit << 8;
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pci_write_config_dword(amd_hb_dev, NB_PCIE_INDX_DATA, val);
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}
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}
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static void amd_iso_dev_put(void)
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{
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amd_ohci_iso_count--;
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if (amd_ohci_iso_count == 0) {
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if (amd_smbus_dev) {
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pci_dev_put(amd_smbus_dev);
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amd_smbus_dev = NULL;
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}
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if (amd_hb_dev) {
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pci_dev_put(amd_hb_dev);
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amd_hb_dev = NULL;
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}
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}
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}
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static void sb800_prefetch(struct ohci_hcd *ohci, int on)
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{
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struct pci_dev *pdev;
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u16 misc;
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pdev = to_pci_dev(ohci_to_hcd(ohci)->self.controller);
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pci_read_config_word(pdev, 0x50, &misc);
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if (on == 0)
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pci_write_config_word(pdev, 0x50, misc & 0xfcff);
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else
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pci_write_config_word(pdev, 0x50, misc | 0x0300);
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}
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/* List of quirks for OHCI */
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static const struct pci_device_id ohci_pci_quirks[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x740c),
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.driver_data = (unsigned long)ohci_quirk_amd756,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_OPTI, 0xc861),
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.driver_data = (unsigned long)ohci_quirk_opti,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_ANY_ID),
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.driver_data = (unsigned long)ohci_quirk_ns,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_COMPAQ, 0xa0f8),
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.driver_data = (unsigned long)ohci_quirk_zfmicro,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, 0x01b6),
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.driver_data = (unsigned long)ohci_quirk_toshiba_scc,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB),
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.driver_data = (unsigned long)ohci_quirk_nec,
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},
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{
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/* Toshiba portege 4000 */
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.vendor = PCI_VENDOR_ID_AL,
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.device = 0x5237,
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.subvendor = PCI_VENDOR_ID_TOSHIBA,
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.subdevice = 0x0004,
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.driver_data = (unsigned long) broken_suspend,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_ITE, 0x8152),
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.driver_data = (unsigned long) broken_suspend,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4397),
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.driver_data = (unsigned long)ohci_quirk_amd700,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4398),
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.driver_data = (unsigned long)ohci_quirk_amd700,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_ATI, 0x4399),
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.driver_data = (unsigned long)ohci_quirk_amd700,
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},
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/* FIXME for some of the early AMD 760 southbridges, OHCI
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* won't work at all. blacklist them.
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*/
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{},
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};
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static int ohci_pci_reset (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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int ret = 0;
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if (hcd->self.controller) {
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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const struct pci_device_id *quirk_id;
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quirk_id = pci_match_id(ohci_pci_quirks, pdev);
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if (quirk_id != NULL) {
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int (*quirk)(struct usb_hcd *ohci);
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quirk = (void *)quirk_id->driver_data;
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ret = quirk(hcd);
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}
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}
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if (ret == 0) {
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ohci_hcd_init (ohci);
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return ohci_init (ohci);
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}
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return ret;
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}
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static int __devinit ohci_pci_start (struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci (hcd);
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int ret;
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#ifdef CONFIG_PM /* avoid warnings about unused pdev */
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if (hcd->self.controller) {
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struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
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/* RWC may not be set for add-in PCI cards, since boot
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* firmware probably ignored them. This transfers PCI
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* PM wakeup capabilities.
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*/
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if (device_can_wakeup(&pdev->dev))
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ohci->hc_control |= OHCI_CTRL_RWC;
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}
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#endif /* CONFIG_PM */
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ret = ohci_run (ohci);
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if (ret < 0) {
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ohci_err (ohci, "can't start\n");
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ohci_stop (hcd);
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}
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return ret;
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}
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#ifdef CONFIG_PM
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static int ohci_pci_suspend(struct usb_hcd *hcd)
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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 = 0;
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/* Root hub was already suspended. Disable irq emission and
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* mark HW unaccessible, bail out if RH has been resumed. Use
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* the spinlock to properly synchronize with possible pending
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* RH suspend or resume activity.
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*
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* This is still racy as hcd->state is manipulated outside of
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* any locks =P But that will be a different fix.
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*/
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spin_lock_irqsave (&ohci->lock, flags);
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if (hcd->state != HC_STATE_SUSPENDED) {
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rc = -EINVAL;
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goto bail;
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}
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ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
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(void)ohci_readl(ohci, &ohci->regs->intrdisable);
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clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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bail:
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spin_unlock_irqrestore (&ohci->lock, flags);
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return rc;
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}
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static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
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{
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set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
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/* Make sure resume from hibernation re-enumerates everything */
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if (hibernated)
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ohci_usb_reset(hcd_to_ohci(hcd));
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ohci_finish_controller_resume(hcd);
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return 0;
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}
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#endif /* CONFIG_PM */
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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_pci_hc_driver = {
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.description = hcd_name,
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.product_desc = "OHCI Host Controller",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_MEMORY | HCD_USB11,
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/*
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* basic lifecycle operations
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*/
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.reset = ohci_pci_reset,
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.start = ohci_pci_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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#ifdef CONFIG_PM
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.pci_suspend = ohci_pci_suspend,
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.pci_resume = ohci_pci_resume,
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#endif
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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/*-------------------------------------------------------------------------*/
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static const struct pci_device_id pci_ids [] = { {
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/* handle any USB OHCI controller */
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PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_OHCI, ~0),
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.driver_data = (unsigned long) &ohci_pci_hc_driver,
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}, { /* end: all zeroes */ }
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};
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MODULE_DEVICE_TABLE (pci, pci_ids);
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/* pci driver glue; this is a "new style" PCI driver module */
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static struct pci_driver ohci_pci_driver = {
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.name = (char *) hcd_name,
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.id_table = pci_ids,
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.probe = usb_hcd_pci_probe,
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.remove = usb_hcd_pci_remove,
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.shutdown = usb_hcd_pci_shutdown,
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#ifdef CONFIG_PM_SLEEP
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.driver = {
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.pm = &usb_hcd_pci_pm_ops
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},
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#endif
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};
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