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author | John Baldwin <jhb@FreeBSD.org> | 2005-12-20 22:41:33 +0000 |
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committer | John Baldwin <jhb@FreeBSD.org> | 2005-12-20 22:41:33 +0000 |
commit | 8e8e46ccfc6acd27c17c449dd1b96a4bf4398d6d (patch) | |
tree | 4b794bf8f8e79aa18b68dd3e238c1a9a079c1751 /sys | |
parent | 2aacedb2376c8e1c3f14936bf9100426231f2a82 (diff) | |
download | src-8e8e46ccfc6acd27c17c449dd1b96a4bf4398d6d.tar.gz src-8e8e46ccfc6acd27c17c449dd1b96a4bf4398d6d.zip |
Add a vgapci(4) stub device driver for VGA PCI devices. This device serves
as a bus so that other drivers such as drm(4), acpi_video(4), and agp(4)
can attach to it thus allowing multiple drivers for the same device. It
also removes the need for the drmsub hack for the i8[13]0/i915 drm and agp
drivers.
Notes
Notes:
svn path=/head/; revision=153577
Diffstat (limited to 'sys')
-rw-r--r-- | sys/dev/pci/vga_pci.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/sys/dev/pci/vga_pci.c b/sys/dev/pci/vga_pci.c new file mode 100644 index 000000000000..43eb8761b7c9 --- /dev/null +++ b/sys/dev/pci/vga_pci.c @@ -0,0 +1,262 @@ +/*- + * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the author nor the names of any co-contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Simple driver for PCI VGA display devices. Drivers such as agp(4) and + * drm(4) should attach as children of this device. + * + * XXX: The vgapci name is a hack until we somehow merge the isa vga driver + * in or rename it. + */ + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> + +#include <dev/pci/pcireg.h> +#include <dev/pci/pcivar.h> + +static int +vga_pci_probe(device_t dev) +{ + + switch (pci_get_class(dev)) { + case PCIC_DISPLAY: + break; + case PCIC_OLD: + if (pci_get_subclass(dev) != PCIS_OLD_VGA) + return (ENXIO); + break; + default: + return (ENXIO); + } + device_set_desc(dev, "VGA-compatible display"); + return (0); +} + +static int +vga_pci_attach(device_t dev) +{ + + bus_generic_probe(dev); + + /* + * If AGP capabilities are present on this device, then create + * an AGP child. + */ + if (pci_find_extcap(dev, PCIY_AGP, NULL) == 0) + device_add_child(dev, "agp", -1); + + /* Always create a drm child for now to make it easier on drm. */ + device_add_child(dev, "drm", -1); + bus_generic_attach(dev); + return (0); +} + +static int +vga_pci_suspend(device_t dev) +{ + + return (bus_generic_suspend(dev)); +} + +static int +vga_pci_resume(device_t dev) +{ + + return (bus_generic_resume(dev)); +} + +/* Bus interface. */ + +static int +vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) +{ + + return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); +} + +static int +vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) +{ + + return (EINVAL); +} + +static struct resource * +vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + + return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); +} + +static int +vga_pci_release_resource(device_t dev, device_t child, int type, int rid, + struct resource *r) +{ + + return (bus_release_resource(dev, type, rid, r)); +} + +/* PCI interface. */ + +static uint32_t +vga_pci_read_config(device_t dev, device_t child, int reg, int width) +{ + + return (pci_read_config(dev, reg, width)); +} + +static void +vga_pci_write_config(device_t dev, device_t child, int reg, + uint32_t val, int width) +{ + + pci_write_config(dev, reg, val, width); +} + +static int +vga_pci_enable_busmaster(device_t dev, device_t child) +{ + + device_printf(dev, "child %s requested pci_enable_busmaster\n", + device_get_nameunit(child)); + return (pci_enable_busmaster(dev)); +} + +static int +vga_pci_disable_busmaster(device_t dev, device_t child) +{ + + device_printf(dev, "child %s requested pci_disable_busmaster\n", + device_get_nameunit(child)); + return (pci_disable_busmaster(dev)); +} + +static int +vga_pci_enable_io(device_t dev, device_t child, int space) +{ + + device_printf(dev, "child %s requested pci_enable_io\n", + device_get_nameunit(child)); + return (pci_enable_io(dev, space)); +} + +static int +vga_pci_disable_io(device_t dev, device_t child, int space) +{ + + device_printf(dev, "child %s requested pci_disable_io\n", + device_get_nameunit(child)); + return (pci_disable_io(dev, space)); +} + +static int +vga_pci_set_powerstate(device_t dev, device_t child, int state) +{ + + device_printf(dev, "child %s requested pci_set_powerstate\n", + device_get_nameunit(child)); + return (pci_set_powerstate(dev, state)); +} + +static int +vga_pci_get_powerstate(device_t dev, device_t child) +{ + + device_printf(dev, "child %s requested pci_get_powerstate\n", + device_get_nameunit(child)); + return (pci_get_powerstate(dev)); +} + +static int +vga_pci_assign_interrupt(device_t dev, device_t child) +{ + + device_printf(dev, "child %s requested pci_assign_interrupt\n", + device_get_nameunit(child)); + return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); +} + +static int +vga_pci_find_extcap(device_t dev, device_t child, int capability, + int *capreg) +{ + + return (pci_find_extcap(dev, capability, capreg)); +} + +static device_method_t vga_pci_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, vga_pci_probe), + DEVMETHOD(device_attach, vga_pci_attach), + DEVMETHOD(device_shutdown, bus_generic_shutdown), + DEVMETHOD(device_suspend, vga_pci_suspend), + DEVMETHOD(device_resume, vga_pci_resume), + + /* Bus interface */ + DEVMETHOD(bus_read_ivar, vga_pci_read_ivar), + DEVMETHOD(bus_write_ivar, vga_pci_write_ivar), + DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), + DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), + + DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource), + DEVMETHOD(bus_release_resource, vga_pci_release_resource), + DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), + DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), + + /* PCI interface */ + DEVMETHOD(pci_read_config, vga_pci_read_config), + DEVMETHOD(pci_write_config, vga_pci_write_config), + DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster), + DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster), + DEVMETHOD(pci_enable_io, vga_pci_enable_io), + DEVMETHOD(pci_disable_io, vga_pci_disable_io), + DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate), + DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate), + DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt), + DEVMETHOD(pci_find_extcap, vga_pci_find_extcap), + + { 0, 0 } +}; + +static driver_t vga_pci_driver = { + "vgapci", + vga_pci_methods, + 1, +}; + +static devclass_t vga_devclass; + +DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0); |