diff options
Diffstat (limited to 'sys/isa/vga_isa.c')
| -rw-r--r-- | sys/isa/vga_isa.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sys/isa/vga_isa.c b/sys/isa/vga_isa.c index 033882d..594e3d0 100644 --- a/sys/isa/vga_isa.c +++ b/sys/isa/vga_isa.c @@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/malloc.h> #include <sys/module.h> #include <sys/conf.h> #include <sys/bus.h> @@ -159,6 +160,58 @@ isavga_attach(device_t dev) return 0; } +static int +isavga_suspend(device_t dev) +{ + vga_softc_t *sc; + int err, nbytes; + + sc = device_get_softc(dev); + err = bus_generic_suspend(dev); + if (err) + return (err); + + /* Save the video state across the suspend. */ + if (sc->state_buf != NULL) { + free(sc->state_buf, M_TEMP); + sc->state_buf = NULL; + } + nbytes = (*vidsw[sc->adp->va_index]->save_state)(sc->adp, NULL, 0); + if (nbytes <= 0) + return (0); + sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO); + if (sc->state_buf == NULL) + return (0); + if (bootverbose) + device_printf(dev, "saving %d bytes of video state\n", nbytes); + if ((*vidsw[sc->adp->va_index]->save_state)(sc->adp, sc->state_buf, + nbytes) != 0) { + device_printf(dev, "failed to save state (nbytes=%d)\n", + nbytes); + free(sc->state_buf, M_TEMP); + sc->state_buf = NULL; + } + return (0); +} + +static int +isavga_resume(device_t dev) +{ + vga_softc_t *sc; + + sc = device_get_softc(dev); + if (sc->state_buf != NULL) { + if ((*vidsw[sc->adp->va_index]->load_state)(sc->adp, + sc->state_buf) != 0) + device_printf(dev, "failed to reload state\n"); + free(sc->state_buf, M_TEMP); + sc->state_buf = NULL; + } + + bus_generic_resume(dev); + return 0; +} + #ifdef FB_INSTALL_CDEV static int @@ -203,6 +256,8 @@ static device_method_t isavga_methods[] = { DEVMETHOD(device_identify, isavga_identify), DEVMETHOD(device_probe, isavga_probe), DEVMETHOD(device_attach, isavga_attach), + DEVMETHOD(device_suspend, isavga_suspend), + DEVMETHOD(device_resume, isavga_resume), DEVMETHOD(bus_print_child, bus_generic_print_child), { 0, 0 } |
