vga_isa.c revision 153072
1/*- 2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 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 as 10 * the first lines of this file unmodified. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/isa/vga_isa.c 153072 2005-12-04 02:12:43Z ru $"); 29 30#include "opt_vga.h" 31#include "opt_fb.h" 32#include "opt_syscons.h" /* should be removed in the future, XXX */ 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/kernel.h> 37#include <sys/malloc.h> 38#include <sys/module.h> 39#include <sys/conf.h> 40#include <sys/bus.h> 41#include <sys/fbio.h> 42 43#include <machine/bus.h> 44#include <machine/resource.h> 45 46#include <sys/rman.h> 47 48#include <vm/vm.h> 49#include <vm/pmap.h> 50 51#include <machine/md_var.h> 52#ifdef __i386__ 53#include <machine/pc/bios.h> 54#endif 55 56#include <dev/fb/fbreg.h> 57#include <dev/fb/vgareg.h> 58 59#include <isa/isareg.h> 60#include <isa/isavar.h> 61 62#define VGA_SOFTC(unit) \ 63 ((vga_softc_t *)devclass_get_softc(isavga_devclass, unit)) 64 65static devclass_t isavga_devclass; 66 67#ifdef FB_INSTALL_CDEV 68 69static d_open_t isavga_open; 70static d_close_t isavga_close; 71static d_read_t isavga_read; 72static d_write_t isavga_write; 73static d_ioctl_t isavga_ioctl; 74static d_mmap_t isavga_mmap; 75 76static struct cdevsw isavga_cdevsw = { 77 .d_version = D_VERSION, 78 .d_flags = D_NEEDGIANT, 79 .d_open = isavga_open, 80 .d_close = isavga_close, 81 .d_read = isavga_read, 82 .d_write = isavga_write, 83 .d_ioctl = isavga_ioctl, 84 .d_mmap = isavga_mmap, 85 .d_name = VGA_DRIVER_NAME, 86}; 87 88#endif /* FB_INSTALL_CDEV */ 89 90static void 91isavga_identify(driver_t *driver, device_t parent) 92{ 93 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, VGA_DRIVER_NAME, 0); 94} 95 96static int 97isavga_probe(device_t dev) 98{ 99 video_adapter_t adp; 100 int error; 101 102 /* No pnp support */ 103 if (isa_get_vendorid(dev)) 104 return (ENXIO); 105 106 device_set_desc(dev, "Generic ISA VGA"); 107 error = vga_probe_unit(device_get_unit(dev), &adp, device_get_flags(dev)); 108 if (error == 0) { 109 bus_set_resource(dev, SYS_RES_IOPORT, 0, 110 adp.va_io_base, adp.va_io_size); 111 bus_set_resource(dev, SYS_RES_MEMORY, 0, 112 adp.va_mem_base, adp.va_mem_size); 113#if 0 114 isa_set_port(dev, adp.va_io_base); 115 isa_set_portsize(dev, adp.va_io_size); 116 isa_set_maddr(dev, adp.va_mem_base); 117 isa_set_msize(dev, adp.va_mem_size); 118#endif 119 } 120 return error; 121} 122 123static int 124isavga_attach(device_t dev) 125{ 126 vga_softc_t *sc; 127 int unit; 128 int rid; 129 int error; 130 131 unit = device_get_unit(dev); 132 sc = device_get_softc(dev); 133 134 rid = 0; 135 bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 136 0, ~0, 0, RF_ACTIVE | RF_SHAREABLE); 137 rid = 0; 138 bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 139 0, ~0, 0, RF_ACTIVE | RF_SHAREABLE); 140 141 error = vga_attach_unit(unit, sc, device_get_flags(dev)); 142 if (error) 143 return error; 144 145#ifdef FB_INSTALL_CDEV 146 /* attach a virtual frame buffer device */ 147 error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw); 148 if (error) 149 return error; 150#endif /* FB_INSTALL_CDEV */ 151 152 if (0 && bootverbose) 153 (*vidsw[sc->adp->va_index]->diag)(sc->adp, bootverbose); 154 155#if 0 /* experimental */ 156 device_add_child(dev, "fb", -1); 157 bus_generic_attach(dev); 158#endif 159 160 return 0; 161} 162 163static int 164isavga_suspend(device_t dev) 165{ 166 vga_softc_t *sc; 167 int err, nbytes; 168 169 sc = device_get_softc(dev); 170 err = bus_generic_suspend(dev); 171 if (err) 172 return (err); 173 174 /* Save the video state across the suspend. */ 175 if (sc->state_buf != NULL) { 176 free(sc->state_buf, M_TEMP); 177 sc->state_buf = NULL; 178 } 179 nbytes = (*vidsw[sc->adp->va_index]->save_state)(sc->adp, NULL, 0); 180 if (nbytes <= 0) 181 return (0); 182 sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO); 183 if (sc->state_buf == NULL) 184 return (0); 185 if (bootverbose) 186 device_printf(dev, "saving %d bytes of video state\n", nbytes); 187 if ((*vidsw[sc->adp->va_index]->save_state)(sc->adp, sc->state_buf, 188 nbytes) != 0) { 189 device_printf(dev, "failed to save state (nbytes=%d)\n", 190 nbytes); 191 free(sc->state_buf, M_TEMP); 192 sc->state_buf = NULL; 193 } 194 return (0); 195} 196 197static int 198isavga_resume(device_t dev) 199{ 200 vga_softc_t *sc; 201 202 sc = device_get_softc(dev); 203 if (sc->state_buf != NULL) { 204 if ((*vidsw[sc->adp->va_index]->load_state)(sc->adp, 205 sc->state_buf) != 0) 206 device_printf(dev, "failed to reload state\n"); 207 free(sc->state_buf, M_TEMP); 208 sc->state_buf = NULL; 209 } 210 211 bus_generic_resume(dev); 212 return 0; 213} 214 215#ifdef FB_INSTALL_CDEV 216 217static int 218isavga_open(struct cdev *dev, int flag, int mode, struct thread *td) 219{ 220 return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td); 221} 222 223static int 224isavga_close(struct cdev *dev, int flag, int mode, struct thread *td) 225{ 226 return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td); 227} 228 229static int 230isavga_read(struct cdev *dev, struct uio *uio, int flag) 231{ 232 return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag); 233} 234 235static int 236isavga_write(struct cdev *dev, struct uio *uio, int flag) 237{ 238 return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag); 239} 240 241static int 242isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td) 243{ 244 return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td); 245} 246 247static int 248isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot) 249{ 250 return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot); 251} 252 253#endif /* FB_INSTALL_CDEV */ 254 255static device_method_t isavga_methods[] = { 256 DEVMETHOD(device_identify, isavga_identify), 257 DEVMETHOD(device_probe, isavga_probe), 258 DEVMETHOD(device_attach, isavga_attach), 259 DEVMETHOD(device_suspend, isavga_suspend), 260 DEVMETHOD(device_resume, isavga_resume), 261 262 DEVMETHOD(bus_print_child, bus_generic_print_child), 263 { 0, 0 } 264}; 265 266static driver_t isavga_driver = { 267 VGA_DRIVER_NAME, 268 isavga_methods, 269 sizeof(vga_softc_t), 270}; 271 272DRIVER_MODULE(vga, isa, isavga_driver, isavga_devclass, 0, 0); 273