1 /* $OpenBSD: vga_pci.c,v 1.10 2001/05/08 16:16:11 mickey Exp $ */ 2 /* $NetBSD: vga_pci.c,v 1.3 1998/06/08 06:55:58 thorpej Exp $ */ 3 4 /* 5 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31 #include "vga.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/device.h> 37 #include <sys/malloc.h> 38 39 #include <dev/pci/pcireg.h> 40 #include <dev/pci/pcivar.h> 41 #include <dev/pci/pcidevs.h> 42 43 #include <dev/ic/mc6845reg.h> 44 #include <dev/ic/pcdisplayvar.h> 45 #include <dev/ic/vgareg.h> 46 #include <dev/ic/vgavar.h> 47 #include <dev/pci/vga_pcivar.h> 48 49 #include <dev/wscons/wsconsio.h> 50 #include <dev/wscons/wsdisplayvar.h> 51 52 struct vga_pci_softc { 53 struct device sc_dev; 54 55 pcitag_t sc_pcitag; /* PCI tag, in case we need it. */ 56 #if 0 57 struct vga_config *sc_vc; /* VGA configuration */ 58 #endif 59 }; 60 61 int vga_pci_match __P((struct device *, void *, void *)); 62 void vga_pci_attach __P((struct device *, struct device *, void *)); 63 64 struct cfattach vga_pci_ca = { 65 sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach, 66 }; 67 68 int 69 vga_pci_match(parent, match, aux) 70 struct device *parent; 71 void *match; 72 void *aux; 73 { 74 struct pci_attach_args *pa = aux; 75 int potential; 76 77 potential = 0; 78 79 /* 80 * If it's prehistoric/vga or display/vga, we might match. 81 * For the console device, this is jut a sanity check. 82 */ 83 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC && 84 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA) 85 potential = 1; 86 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 87 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 88 potential = 1; 89 90 if (!potential) 91 return (0); 92 93 /* check whether it is disabled by firmware */ 94 if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) 95 & (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) 96 != (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE)) 97 return (0); 98 99 /* If it's the console, we have a winner! */ 100 if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA)) 101 return (1); 102 103 /* 104 * If we might match, make sure that the card actually looks OK. 105 */ 106 if (!vga_common_probe(pa->pa_iot, pa->pa_memt)) 107 return (0); 108 109 return (1); 110 } 111 112 void 113 vga_pci_attach(parent, self, aux) 114 struct device *parent, *self; 115 void *aux; 116 { 117 struct pci_attach_args *pa = aux; 118 struct vga_pci_softc *sc = (struct vga_pci_softc *)self; 119 char devinfo[256]; 120 121 sc->sc_pcitag = pa->pa_tag; 122 123 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo); 124 printf("\n"); 125 126 vga_common_attach(self, pa->pa_iot, pa->pa_memt, 127 WSDISPLAY_TYPE_PCIVGA); 128 } 129 130 int 131 vga_pci_cnattach(iot, memt, pc, bus, device, function) 132 bus_space_tag_t iot, memt; 133 pci_chipset_tag_t pc; 134 int bus, device, function; 135 { 136 return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0)); 137 } 138 139 int 140 vga_pci_ioctl(v, cmd, addr, flag, p) 141 void *v; 142 u_long cmd; 143 caddr_t addr; 144 int flag; 145 struct proc *p; 146 { 147 return (ENOTTY); 148 } 149