diff options
Diffstat (limited to 'sys/dev/video/fbdev.c')
| -rw-r--r-- | sys/dev/video/fbdev.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sys/dev/video/fbdev.c b/sys/dev/video/fbdev.c index f21c769..391400c 100644 --- a/sys/dev/video/fbdev.c +++ b/sys/dev/video/fbdev.c @@ -29,16 +29,35 @@ #include <sys/types.h> #include <sys/limine.h> +#include <sys/device.h> +#include <sys/driver.h> #include <dev/video/fbdev.h> +#include <fs/devfs.h> +#include <vm/vm.h> #define FRAMEBUFFER \ framebuffer_req.response->framebuffers[0] +static struct cdevsw fb_cdevsw; static volatile struct limine_framebuffer_request framebuffer_req = { .id = LIMINE_FRAMEBUFFER_REQUEST, .revision = 0 }; +static paddr_t +fbdev_mmap(dev_t dev, off_t off, int flags) +{ + size_t max_bounds; + + max_bounds = FRAMEBUFFER->pitch * FRAMEBUFFER->height; + max_bounds /= 4; + if (off > max_bounds) { + return 0; + } + + return VIRT_TO_PHYS(FRAMEBUFFER->address); +} + struct fbdev fbdev_get(void) { @@ -51,3 +70,26 @@ fbdev_get(void) ret.bpp = FRAMEBUFFER->bpp; return ret; } + +static int +fbdev_init(void) +{ + char devname[] = "fb0"; + devmajor_t major; + dev_t dev; + + /* Register the device here */ + major = dev_alloc_major(); + dev = dev_alloc(major); + dev_register(major, dev, &fb_cdevsw); + devfs_create_entry(devname, major, dev, 0444); + return 0; +} + +static struct cdevsw fb_cdevsw = { + .read = noread, + .write = nowrite, + .mmap = fbdev_mmap +}; + +DRIVER_EXPORT(fbdev_init); |