From 66cdd06426b34deb367c987a3dafeda8d7e2d8aa Mon Sep 17 00:00:00 2001
From: jkim <jkim@FreeBSD.org>
Date: Fri, 6 Nov 2009 20:32:26 +0000
Subject: Remove duplicate suspend/resume code from vga_pci.c and let vga(4)
 register itself to an associated PCI device if it exists.  It is little bit
 hackish but it should fix build without frame buffer driver since r198964.
 Fix some style(9) nits in vga_isa.c while we are here.

---
 sys/isa/vga_isa.c | 72 ++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 53 insertions(+), 19 deletions(-)

(limited to 'sys/isa')

diff --git a/sys/isa/vga_isa.c b/sys/isa/vga_isa.c
index cfb36ae..e86ee46 100644
--- a/sys/isa/vga_isa.c
+++ b/sys/isa/vga_isa.c
@@ -117,13 +117,17 @@ isavga_probe(device_t dev)
 		isa_set_msize(dev, adp.va_mem_size);
 #endif
 	}
-	return error;
+	return (error);
 }
 
 static int
 isavga_attach(device_t dev)
 {
 	vga_softc_t *sc;
+	devclass_t dc;
+	device_t *devs;
+	void *vgapci_sc;
+	int count, i;
 	int unit;
 	int rid;
 	int error;
@@ -140,13 +144,13 @@ isavga_attach(device_t dev)
 
 	error = vga_attach_unit(unit, sc, device_get_flags(dev));
 	if (error)
-		return error;
+		return (error);
 
 #ifdef FB_INSTALL_CDEV
 	/* attach a virtual frame buffer device */
 	error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw);
 	if (error)
-		return error;
+		return (error);
 #endif /* FB_INSTALL_CDEV */
 
 	if (0 && bootverbose)
@@ -157,20 +161,43 @@ isavga_attach(device_t dev)
 	bus_generic_attach(dev);
 #endif
 
-	return 0;
+	/* Find the matching PCI video controller. */
+	if (unit == 0) {
+		dc = devclass_find("vgapci");
+		if (dc != NULL &&
+		    devclass_get_devices(dc, &devs, &count) == 0) {
+			for (i = 0; i < count; i++)
+				if (device_get_flags(devs[i]) != 0) {
+					sc->pci_dev = devs[i];
+					break;
+				}
+			free(devs, M_TEMP);
+		}
+		if (sc->pci_dev != NULL) {
+			vgapci_sc = device_get_softc(sc->pci_dev);
+			*(device_t *)vgapci_sc = dev;
+			device_printf(dev, "associated with %s\n",
+			    device_get_nameunit(sc->pci_dev));
+		}
+	}
+
+	return (0);
 }
 
 static int
 isavga_suspend(device_t dev)
 {
 	vga_softc_t *sc;
+	device_t isa_dev;
 	int err, nbytes;
 
-	err = bus_generic_suspend(dev);
-	if (err)
-		return (err);
-
-	sc = device_get_softc(dev);
+	err = 0;
+	isa_dev = dev;
+	sc = device_get_softc(isa_dev);
+	if (sc->pci_dev != NULL)
+		dev = sc->pci_dev;
+	else
+		err = bus_generic_suspend(isa_dev);
 
 	/* Save the video state across the suspend. */
 	if (sc->state_buf != NULL)
@@ -193,7 +220,7 @@ isavga_suspend(device_t dev)
 save_palette:
 	/* Save the color palette across the suspend. */
 	if (sc->pal_buf != NULL)
-		return (0);
+		return (err);
 	sc->pal_buf = malloc(256 * 3, M_TEMP, M_NOWAIT);
 	if (sc->pal_buf != NULL) {
 		if (bootverbose)
@@ -205,15 +232,19 @@ save_palette:
 		}
 	}
 
-	return (0);
+	return (err);
 }
 
 static int
 isavga_resume(device_t dev)
 {
 	vga_softc_t *sc;
+	device_t isa_dev;
 
-	sc = device_get_softc(dev);
+	isa_dev = dev;
+	sc = device_get_softc(isa_dev);
+	if (sc->pci_dev != NULL)
+		dev = sc->pci_dev;
 
 	if (sc->state_buf != NULL) {
 		if (vidd_load_state(sc->adp, sc->state_buf) != 0)
@@ -228,7 +259,10 @@ isavga_resume(device_t dev)
 		sc->pal_buf = NULL;
 	}
 
-	return (bus_generic_resume(dev));
+	if (isa_dev != dev)
+		return (0);
+
+	return (bus_generic_resume(isa_dev));
 }
 
 #ifdef FB_INSTALL_CDEV
@@ -236,37 +270,37 @@ isavga_resume(device_t dev)
 static int
 isavga_open(struct cdev *dev, int flag, int mode, struct thread *td)
 {
-	return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
+	return (vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td));
 }
 
 static int
 isavga_close(struct cdev *dev, int flag, int mode, struct thread *td)
 {
-	return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
+	return (vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td));
 }
 
 static int
 isavga_read(struct cdev *dev, struct uio *uio, int flag)
 {
-	return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
+	return (vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag));
 }
 
 static int
 isavga_write(struct cdev *dev, struct uio *uio, int flag)
 {
-	return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
+	return (vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag));
 }
 
 static int
 isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
 {
-	return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td);
+	return (vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td));
 }
 
 static int
 isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
 {
-	return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot);
+	return (vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot));
 }
 
 #endif /* FB_INSTALL_CDEV */
-- 
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