/* $NetBSD: vga_pci.c,v 1.26 2005/02/27 00:27:34 perry Exp $ */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include __KERNEL_RCSID(0, "$NetBSD: vga_pci.c,v 1.26 2005/02/27 00:27:34 perry Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* For legacy VGA address ranges */ #include #include #define NBARS 6 /* number of PCI BARs */ struct vga_bar { bus_addr_t vb_base; bus_size_t vb_size; pcireg_t vb_type; int vb_flags; }; struct vga_pci_softc { struct vga_softc sc_vga; pci_chipset_tag_t sc_pc; pcitag_t sc_pcitag; struct vga_bar sc_bars[NBARS]; struct vga_bar sc_rom; }; int vga_pci_match(struct device *, struct cfdata *, void *); void vga_pci_attach(struct device *, struct device *, void *); static int vga_pci_lookup_quirks(struct pci_attach_args *); CFATTACH_DECL(vga_pci, sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach, NULL, NULL); int vga_pci_ioctl(void *, u_long, caddr_t, int, struct proc *); paddr_t vga_pci_mmap(void *, off_t, int); const struct vga_funcs vga_pci_funcs = { vga_pci_ioctl, vga_pci_mmap, }; static const struct { int id; int quirks; } vga_pci_quirks[] = { {PCI_ID_CODE(PCI_VENDOR_SILMOTION, PCI_PRODUCT_SILMOTION_SM712), VGA_QUIRK_NOFASTSCROLL}, }; static const struct { int vid; int quirks; } vga_pci_vquirks[] = { {PCI_VENDOR_ATI, VGA_QUIRK_ONEFONT}, }; static int vga_pci_lookup_quirks(pa) struct pci_attach_args *pa; { int i; for (i = 0; i < sizeof(vga_pci_quirks) / sizeof (vga_pci_quirks[0]); i++) { if (vga_pci_quirks[i].id == pa->pa_id) return (vga_pci_quirks[i].quirks); } for (i = 0; i < sizeof(vga_pci_vquirks) / sizeof (vga_pci_vquirks[0]); i++) { if (vga_pci_vquirks[i].vid == PCI_VENDOR(pa->pa_id)) return (vga_pci_vquirks[i].quirks); } return (0); } int vga_pci_match(struct device *parent, struct cfdata *match, void *aux) { struct pci_attach_args *pa = aux; int potential; potential = 0; /* * If it's prehistoric/vga or display/vga, we might match. * For the console device, this is just a sanity check. */ if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA) potential = 1; if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) potential = 1; if (!potential) return (0); /* check whether it is disabled by firmware */ if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) & (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) != (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) return (0); /* If it's the console, we have a winner! */ if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA)) return (1); /* * If we might match, make sure that the card actually looks OK. */ if (!vga_common_probe(pa->pa_iot, pa->pa_memt)) return (0); return (1); } void vga_pci_attach(struct device *parent, struct device *self, void *aux) { struct vga_pci_softc *psc = (void *) self; struct vga_softc *sc = &psc->sc_vga; struct pci_attach_args *pa = aux; char devinfo[256]; int bar, reg; psc->sc_pc = pa->pa_pc; psc->sc_pcitag = pa->pa_tag; pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class)); /* * Gather info about all the BARs. These are used to allow * the X server to map the VGA device. */ for (bar = 0; bar < NBARS; bar++) { reg = PCI_MAPREG_START + (bar * 4); if (!pci_mapreg_probe(psc->sc_pc, psc->sc_pcitag, reg, &psc->sc_bars[bar].vb_type)) { /* there is no valid mapping register */ continue; } if (PCI_MAPREG_TYPE(psc->sc_bars[bar].vb_type) == PCI_MAPREG_TYPE_IO) { /* Don't bother fetching I/O BARs. */ continue; } if (PCI_MAPREG_MEM_TYPE(psc->sc_bars[bar].vb_type) == PCI_MAPREG_MEM_TYPE_64BIT) { /* XXX */ printf("%s: WARNING: ignoring 64-bit BAR @ 0x%02x\n", sc->sc_dev.dv_xname, reg); bar++; continue; } if (pci_mapreg_info(psc->sc_pc, psc->sc_pcitag, reg, psc->sc_bars[bar].vb_type, &psc->sc_bars[bar].vb_base, &psc->sc_bars[bar].vb_size, &psc->sc_bars[bar].vb_flags)) printf("%s: WARNING: strange BAR @ 0x%02x\n", sc->sc_dev.dv_xname, reg); } /* XXX Expansion ROM? */ vga_common_attach(sc, pa->pa_iot, pa->pa_memt, WSDISPLAY_TYPE_PCIVGA, vga_pci_lookup_quirks(pa), &vga_pci_funcs); } int vga_pci_cnattach(bus_space_tag_t iot, bus_space_tag_t memt, pci_chipset_tag_t pc, int bus, int device, int function) { return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0)); } int vga_pci_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) { struct vga_config *vc = v; struct vga_pci_softc *psc = (void *) vc->softc; switch (cmd) { /* PCI config read/write passthrough. */ case PCI_IOC_CFGREAD: case PCI_IOC_CFGWRITE: return (pci_devioctl(psc->sc_pc, psc->sc_pcitag, cmd, data, flag, p)); default: return (EPASSTHROUGH); } } paddr_t vga_pci_mmap(void *v, off_t offset, int prot) { struct vga_config *vc = v; struct vga_pci_softc *psc = (void *) vc->softc; struct vga_bar *vb; int bar; for (bar = 0; bar < NBARS; bar++) { vb = &psc->sc_bars[bar]; if (vb->vb_size == 0) continue; if (offset >= vb->vb_base && offset < (vb->vb_base + vb->vb_size)) { /* XXX This the right thing to do with flags? */ return (bus_space_mmap(vc->hdl.vh_memt, vb->vb_base, (offset - vb->vb_base), prot, vb->vb_flags)); } } /* XXX Expansion ROM? */ /* * Allow mmap access to the legacy ISA hole. This is where * the legacy video BIOS will be located, and also where * the legacy VGA display buffer is located. * * XXX Security implications, here? */ if (offset >= IOM_BEGIN && offset < IOM_END) return (bus_space_mmap(vc->hdl.vh_memt, IOM_BEGIN, (offset - IOM_BEGIN), prot, 0)); /* Range not found. */ return (-1); }