diff options
Diffstat (limited to 'drivers/video/fbdev/vfb.c')
| -rw-r--r-- | drivers/video/fbdev/vfb.c | 129 |
1 files changed, 27 insertions, 102 deletions
diff --git a/drivers/video/fbdev/vfb.c b/drivers/video/fbdev/vfb.c index b9c2f81fb6b9..da653a080394 100644 --- a/drivers/video/fbdev/vfb.c +++ b/drivers/video/fbdev/vfb.c @@ -35,76 +35,23 @@ static void *videomemory; static u_long videomemorysize = VIDEOMEMSIZE; module_param(videomemorysize, ulong, 0); +MODULE_PARM_DESC(videomemorysize, "RAM available to frame buffer (in bytes)"); -/********************************************************************** - * - * Memory management - * - **********************************************************************/ -static void *rvmalloc(unsigned long size) -{ - void *mem; - unsigned long adr; - - size = PAGE_ALIGN(size); - mem = vmalloc_32(size); - if (!mem) - return NULL; - - /* - * VFB must clear memory to prevent kernel info - * leakage into userspace - * VGA-based drivers MUST NOT clear memory if - * they want to be able to take over vgacon - */ - - memset(mem, 0, size); - adr = (unsigned long) mem; - while (size > 0) { - SetPageReserved(vmalloc_to_page((void *)adr)); - adr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - return mem; -} - -static void rvfree(void *mem, unsigned long size) -{ - unsigned long adr; - - if (!mem) - return; - - adr = (unsigned long) mem; - while ((long) size > 0) { - ClearPageReserved(vmalloc_to_page((void *)adr)); - adr += PAGE_SIZE; - size -= PAGE_SIZE; - } - vfree(mem); -} +static char *mode_option = NULL; +module_param(mode_option, charp, 0); +MODULE_PARM_DESC(mode_option, "Preferred video mode (e.g. 640x480-8@60)"); -static struct fb_var_screeninfo vfb_default = { +static const struct fb_videomode vfb_default = { .xres = 640, .yres = 480, - .xres_virtual = 640, - .yres_virtual = 480, - .bits_per_pixel = 8, - .red = { 0, 8, 0 }, - .green = { 0, 8, 0 }, - .blue = { 0, 8, 0 }, - .activate = FB_ACTIVATE_TEST, - .height = -1, - .width = -1, - .pixclock = 20000, - .left_margin = 64, - .right_margin = 64, - .upper_margin = 32, - .lower_margin = 32, - .hsync_len = 64, - .vsync_len = 2, - .vmode = FB_VMODE_NONINTERLACED, + .pixclock = 20000, + .left_margin = 64, + .right_margin = 64, + .upper_margin = 32, + .lower_margin = 32, + .hsync_len = 64, + .vsync_len = 2, + .vmode = FB_VMODE_NONINTERLACED, }; static struct fb_fix_screeninfo vfb_fix = { @@ -119,6 +66,7 @@ static struct fb_fix_screeninfo vfb_fix = { static bool vfb_enable __initdata = 0; /* disabled by default */ module_param(vfb_enable, bool, 0); +MODULE_PARM_DESC(vfb_enable, "Enable Virtual FB driver"); static int vfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info); @@ -421,35 +369,7 @@ static int vfb_pan_display(struct fb_var_screeninfo *var, static int vfb_mmap(struct fb_info *info, struct vm_area_struct *vma) { - unsigned long start = vma->vm_start; - unsigned long size = vma->vm_end - vma->vm_start; - unsigned long offset = vma->vm_pgoff << PAGE_SHIFT; - unsigned long page, pos; - - if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) - return -EINVAL; - if (size > info->fix.smem_len) - return -EINVAL; - if (offset > info->fix.smem_len - size) - return -EINVAL; - - pos = (unsigned long)info->fix.smem_start + offset; - - while (size > 0) { - page = vmalloc_to_pfn((void *)pos); - if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) { - return -EAGAIN; - } - start += PAGE_SIZE; - pos += PAGE_SIZE; - if (size > PAGE_SIZE) - size -= PAGE_SIZE; - else - size = 0; - } - - return 0; - + return remap_vmalloc_range(vma, (void *)info->fix.smem_start, vma->vm_pgoff); } #ifndef MODULE @@ -477,6 +397,8 @@ static int __init vfb_setup(char *options) /* Test disable for backwards compatibility */ if (!strcmp(this_opt, "disable")) vfb_enable = 0; + else + mode_option = this_opt; } return 1; } @@ -489,12 +411,13 @@ static int __init vfb_setup(char *options) static int vfb_probe(struct platform_device *dev) { struct fb_info *info; + unsigned int size = PAGE_ALIGN(videomemorysize); int retval = -ENOMEM; /* * For real video cards we use ioremap. */ - if (!(videomemory = rvmalloc(videomemorysize))) + if (!(videomemory = vmalloc_32_user(size))) return retval; info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev); @@ -504,11 +427,13 @@ static int vfb_probe(struct platform_device *dev) info->screen_base = (char __iomem *)videomemory; info->fbops = &vfb_ops; - retval = fb_find_mode(&info->var, info, NULL, - NULL, 0, NULL, 8); + if (!fb_find_mode(&info->var, info, mode_option, + NULL, 0, &vfb_default, 8)){ + fb_err(info, "Unable to find usable video mode.\n"); + retval = -EINVAL; + goto err1; + } - if (!retval || (retval == 4)) - info->var = vfb_default; vfb_fix.smem_start = (unsigned long) videomemory; vfb_fix.smem_len = videomemorysize; info->fix = vfb_fix; @@ -533,7 +458,7 @@ err2: err1: framebuffer_release(info); err: - rvfree(videomemory, videomemorysize); + vfree(videomemory); return retval; } @@ -543,7 +468,7 @@ static int vfb_remove(struct platform_device *dev) if (info) { unregister_framebuffer(info); - rvfree(videomemory, videomemorysize); + vfree(videomemory); fb_dealloc_cmap(&info->cmap); framebuffer_release(info); } |