1 /*- 2 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/pci/vga_pci.c,v 1.5.8.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 /* 33 * Simple driver for PCI VGA display devices. Drivers such as agp(4) and 34 * drm(4) should attach as children of this device. 35 * 36 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver 37 * in or rename it. 38 */ 39 40 #include <sys/param.h> 41 #include <sys/bus.h> 42 #include <sys/kernel.h> 43 #include <sys/module.h> 44 45 #include <bus/pci/pcireg.h> 46 #include <bus/pci/pcivar.h> 47 48 static int 49 vga_pci_probe(device_t dev) 50 { 51 52 switch (pci_get_class(dev)) { 53 case PCIC_DISPLAY: 54 break; 55 case PCIC_OLD: 56 if (pci_get_subclass(dev) != PCIS_OLD_VGA) 57 return (ENXIO); 58 break; 59 default: 60 return (ENXIO); 61 } 62 device_set_desc(dev, "VGA-compatible display"); 63 return (BUS_PROBE_GENERIC); 64 } 65 66 static int 67 vga_pci_attach(device_t dev) 68 { 69 70 bus_generic_probe(dev); 71 72 /* Always create a drm child for now to make it easier on drm. */ 73 device_add_child(dev, "drm", -1); 74 bus_generic_attach(dev); 75 return (0); 76 } 77 78 static int 79 vga_pci_suspend(device_t dev) 80 { 81 82 return (bus_generic_suspend(dev)); 83 } 84 85 static int 86 vga_pci_resume(device_t dev) 87 { 88 89 return (bus_generic_resume(dev)); 90 } 91 92 /* Bus interface. */ 93 94 static int 95 vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 96 { 97 98 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); 99 } 100 101 static int 102 vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 103 { 104 105 return (EINVAL); 106 } 107 108 static struct resource * 109 vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 110 u_long start, u_long end, u_long count, u_int flags, int cpuid __unused) 111 { 112 113 return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 114 } 115 116 static int 117 vga_pci_release_resource(device_t dev, device_t child, int type, int rid, 118 struct resource *r) 119 { 120 121 return (bus_release_resource(dev, type, rid, r)); 122 } 123 124 /* PCI interface. */ 125 126 static uint32_t 127 vga_pci_read_config(device_t dev, device_t child, int reg, int width) 128 { 129 130 return (pci_read_config(dev, reg, width)); 131 } 132 133 static void 134 vga_pci_write_config(device_t dev, device_t child, int reg, 135 uint32_t val, int width) 136 { 137 138 pci_write_config(dev, reg, val, width); 139 } 140 141 static int 142 vga_pci_enable_busmaster(device_t dev, device_t child) 143 { 144 145 device_printf(dev, "child %s requested pci_enable_busmaster\n", 146 device_get_nameunit(child)); 147 return (pci_enable_busmaster(dev)); 148 } 149 150 static int 151 vga_pci_disable_busmaster(device_t dev, device_t child) 152 { 153 154 device_printf(dev, "child %s requested pci_disable_busmaster\n", 155 device_get_nameunit(child)); 156 return (pci_disable_busmaster(dev)); 157 } 158 159 static int 160 vga_pci_enable_io(device_t dev, device_t child, int space) 161 { 162 163 device_printf(dev, "child %s requested pci_enable_io\n", 164 device_get_nameunit(child)); 165 return (pci_enable_io(dev, space)); 166 } 167 168 static int 169 vga_pci_disable_io(device_t dev, device_t child, int space) 170 { 171 172 device_printf(dev, "child %s requested pci_disable_io\n", 173 device_get_nameunit(child)); 174 return (pci_disable_io(dev, space)); 175 } 176 177 static int 178 vga_pci_set_powerstate(device_t dev, device_t child, int state) 179 { 180 181 device_printf(dev, "child %s requested pci_set_powerstate\n", 182 device_get_nameunit(child)); 183 return (pci_set_powerstate(dev, state)); 184 } 185 186 static int 187 vga_pci_get_powerstate(device_t dev, device_t child) 188 { 189 190 device_printf(dev, "child %s requested pci_get_powerstate\n", 191 device_get_nameunit(child)); 192 return (pci_get_powerstate(dev)); 193 } 194 195 static int 196 vga_pci_assign_interrupt(device_t dev, device_t child) 197 { 198 199 device_printf(dev, "child %s requested pci_assign_interrupt\n", 200 device_get_nameunit(child)); 201 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 202 } 203 204 static int 205 vga_pci_find_extcap(device_t dev, device_t child, int capability, 206 int *capreg) 207 { 208 209 return (pci_find_extcap(dev, capability, capreg)); 210 } 211 212 static device_method_t vga_pci_methods[] = { 213 /* Device interface */ 214 DEVMETHOD(device_probe, vga_pci_probe), 215 DEVMETHOD(device_attach, vga_pci_attach), 216 DEVMETHOD(device_shutdown, bus_generic_shutdown), 217 DEVMETHOD(device_suspend, vga_pci_suspend), 218 DEVMETHOD(device_resume, vga_pci_resume), 219 220 /* Bus interface */ 221 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar), 222 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar), 223 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 224 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 225 226 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource), 227 DEVMETHOD(bus_release_resource, vga_pci_release_resource), 228 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 229 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 230 231 /* PCI interface */ 232 DEVMETHOD(pci_read_config, vga_pci_read_config), 233 DEVMETHOD(pci_write_config, vga_pci_write_config), 234 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster), 235 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster), 236 DEVMETHOD(pci_enable_io, vga_pci_enable_io), 237 DEVMETHOD(pci_disable_io, vga_pci_disable_io), 238 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate), 239 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate), 240 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt), 241 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap), 242 243 DEVMETHOD_END 244 }; 245 246 static driver_t vga_pci_driver = { 247 "vgapci", 248 vga_pci_methods, 249 1, 250 }; 251 252 static devclass_t vga_devclass; 253 254 DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, NULL, NULL); 255