PCI frontend for sys/dev/ic/vga.c

sys/dev/pci/vga_pci.c

@@ -0,0 +1,141 @@
+/* $NetBSD: vga_pci.c,v 1.1 1998/03/22 15:16:18 drochner 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 <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcidevs.h>
+
+#include <dev/ic/vgareg.h>
+#include <dev/ic/vgavar.h>
+#include <dev/pci/vga_pcivar.h>
+
+#include <dev/wscons/wsconsio.h>
+#include <dev/wscons/wsdisplayvar.h>
+
+struct vga_pci_softc {
+	struct device sc_dev; 
+ 
+	pcitag_t sc_pcitag;		/* PCI tag, in case we need it. */
+#if 0
+	struct vga_config *sc_vc;	/* VGA configuration */
+#endif
+};
+
+#ifdef __BROKEN_INDIRECT_CONFIG
+int	vga_pci_match __P((struct device *, void *, void *));
+#else
+int	vga_pci_match __P((struct device *, struct cfdata *, void *));
+#endif
+void	vga_pci_attach __P((struct device *, struct device *, void *));
+
+struct cfattach vga_pci_ca = {
+	sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach,
+};
+
+int
+vga_pci_match(parent, match, aux)
+	struct device *parent;
+#ifdef __BROKEN_INDIRECT_CONFIG
+	void *match;
+#else
+	struct cfdata *match;
+#endif
+	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 jut 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(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct pci_attach_args *pa = aux;
+	struct vga_pci_softc *sc = (struct vga_pci_softc *)self;
+	char devinfo[256];
+
+	sc->sc_pcitag = pa->pa_tag;
+
+	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
+	printf(": %s (rev. 0x%02x)\n", devinfo,
+	    PCI_REVISION(pa->pa_class));
+
+	vga_common_attach(self, pa->pa_iot, pa->pa_memt,
+			  WSDISPLAY_TYPE_PCIVGA);
+}
+
+int
+vga_pci_cnattach(iot, memt, pc, bus, device, function)
+	bus_space_tag_t iot, memt;
+	pci_chipset_tag_t pc;
+	int bus, device, function;
+{
+	return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0));
+}

sys/dev/pci/vga_pcivar.h

@@ -0,0 +1,37 @@
+/* $NetBSD: vga_pcivar.h,v 1.1 1998/03/22 15:16:19 drochner 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.
+ */
+
+#define	DEVICE_IS_VGA_PCI(class, id)					\
+	    (((PCI_CLASS(class) == PCI_CLASS_DISPLAY &&			\
+	      PCI_SUBCLASS(class) == PCI_SUBCLASS_DISPLAY_VGA) ||	\
+	     (PCI_CLASS(class) == PCI_CLASS_PREHISTORIC &&		\
+	      PCI_SUBCLASS(class) == PCI_SUBCLASS_PREHISTORIC_VGA)) ? 1 : 0)
+
+int vga_pci_cnattach __P((bus_space_tag_t, bus_space_tag_t,
+			  pci_chipset_tag_t, int, int, int));