/* sbuslib.c: Helper library for SBUS framebuffer drivers. * * Copyright (C) 2003 David S. Miller (davem@redhat.com) */ #include <linux/compat.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/fb.h> #include <linux/mm.h> #include <asm/oplib.h> #include <asm/fbio.h> #include "sbuslib.h" void sbusfb_fill_var(struct fb_var_screeninfo *var, int prom_node, int bpp) { memset(var, 0, sizeof(*var)); var->xres = prom_getintdefault(prom_node, "width", 1152); var->yres = prom_getintdefault(prom_node, "height", 900); var->xres_virtual = var->xres; var->yres_virtual = var->yres; var->bits_per_pixel = bpp; } EXPORT_SYMBOL(sbusfb_fill_var); static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize) { if (size == SBUS_MMAP_EMPTY) return 0; if (size >= 0) return size; return fbsize * (-size); } int sbusfb_mmap_helper(struct sbus_mmap_map *map, unsigned long physbase, unsigned long fbsize, unsigned long iospace, struct vm_area_struct *vma) { unsigned int size, page, r, map_size; unsigned long map_offset = 0; unsigned long off; int i; if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE))) return -EINVAL; size = vma->vm_end - vma->vm_start; if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; off = vma->vm_pgoff << PAGE_SHIFT; /* To stop the swapper from even considering these pages */ vma->vm_flags |= (VM_IO | VM_RESERVED); /* Each page, see which map applies */ for (page = 0; page < size; ){ map_size = 0; for (i = 0; map[i].size; i++) if (map[i].voff == off+page) { map_size = sbusfb_mmapsize(map[i].size, fbsize); #ifdef __sparc_v9__ #define POFF_MASK (PAGE_MASK|0x1UL) #else #define POFF_MASK (PAGE_MASK) #endif map_offset = (physbase + map[i].poff) & POFF_MASK; break; } if (!map_size){ page += PAGE_SIZE; continue; } if (page + map_size > size) map_size = size - page; r = io_remap_pfn_range(vma, vma->vm_start + page, MK_IOSPACE_PFN(iospace, map_offset >> PAGE_SHIFT), map_size, vma->vm_page_prot); if (r) return -EAGAIN; page += map_size; } return 0; } EXPORT_SYMBOL(sbusfb_mmap_helper); int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg, struct fb_info *info, int type, int fb_depth, unsigned long fb_size) { switch(cmd) { case FBIOGTYPE: { struct fbtype __user *f = (struct fbtype __user *) arg; if (put_user(type, &f->fb_type) || __put_user(info->var.yres, &f->fb_height) || __put_user(info->var.xres, &f->fb_width) || __put_user(fb_depth, &f->fb_depth) || __put_user(0, &f->fb_cmsize) || __put_user(fb_size, &f->fb_cmsize)) return -EFAULT; return 0; } case FBIOPUTCMAP_SPARC: { struct fbcmap __user *c = (struct fbcmap __user *) arg; struct fb_cmap cmap; u16 red, green, blue; u8 red8, green8, blue8; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; int index, count, i; if (get_user(index, &c->index) || __get_user(count, &c->count) || __get_user(ured, &c->red) || __get_user(ugreen, &c->green) || __get_user(ublue, &c->blue)) return -EFAULT; cmap.len = 1; cmap.red = &red; cmap.green = &green; cmap.blue = &blue; cmap.transp = NULL; for (i = 0; i < count; i++) { int err; if (get_user(red8, &ured[i]) || get_user(green8, &ugreen[i]) || get_user(blue8, &ublue[i])) return -EFAULT; red = red8 << 8; green = green8 << 8; blue = blue8 << 8; cmap.start = index + i; err = fb_set_cmap(&cmap, info); if (err) return err; } return 0; } case FBIOGETCMAP_SPARC: { struct fbcmap __user *c = (struct fbcmap __user *) arg; unsigned char __user *ured; unsigned char __user *ugreen; unsigned char __user *ublue; struct fb_cmap *cmap = &info->cmap; int index, count, i; u8 red, green, blue; if (get_user(index, &c->index) || __get_user(count, &c->count) || __get_user(ured, &c->red) || __get_user(ugreen, &c->green) || __get_user(ublue, &c->blue)) return -EFAULT; if (index + count > cmap->len) return -EINVAL; for (i = 0; i < count; i++) { red = cmap->red[index + i] >> 8; green = cmap->green[index + i] >> 8; blue = cmap->blue[index + i] >> 8; if (put_user(red, &ured[i]) || put_user(green, &ugreen[i]) || put_user(blue, &ublue[i])) return -EFAULT; } return 0; } default: return -EINVAL; }; } EXPORT_SYMBOL(sbusfb_ioctl_helper); #ifdef CONFIG_COMPAT struct fbcmap32 { int index; /* first element (0 origin) */ int count; u32 red; u32 green; u32 blue; }; #define FBIOPUTCMAP32 _IOW('F', 3, struct fbcmap32) #define FBIOGETCMAP32 _IOW('F', 4, struct fbcmap32) static int fbiogetputcmap(struct file *file, struct fb_info *info, unsigned int cmd, unsigned long arg) { struct fbcmap32 __user *argp = (void __user *)arg; struct fbcmap __user *p = compat_alloc_user_space(sizeof(*p)); u32 addr; int ret; ret = copy_in_user(p, argp, 2 * sizeof(int)); ret |= get_user(addr, &argp->red); ret |= put_user(compat_ptr(addr), &p->red); ret |= get_user(addr, &argp->green); ret |= put_user(compat_ptr(addr), &p->green); ret |= get_user(addr, &argp->blue); ret |= put_user(compat_ptr(addr), &p->blue); if (ret) return -EFAULT; return info->fbops->fb_ioctl(file->f_dentry->d_inode, file, (cmd == FBIOPUTCMAP32) ? FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC, (unsigned long)p, info); } struct fbcursor32 { short set; /* what to set, choose from the list above */ short enable; /* cursor on/off */ struct fbcurpos pos; /* cursor position */ struct fbcurpos hot; /* cursor hot spot */ struct fbcmap32 cmap; /* color map info */ struct fbcurpos size; /* cursor bit map size */ u32 image; /* cursor image bits */ u32 mask; /* cursor mask bits */ }; #define FBIOSCURSOR32 _IOW('F', 24, struct fbcursor32) #define FBIOGCURSOR32 _IOW('F', 25, struct fbcursor32) static int fbiogscursor(struct file *file, struct fb_info *info, unsigned long arg) { struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p)); struct fbcursor32 __user *argp = (void __user *)arg; compat_uptr_t addr; int ret; ret = copy_in_user(p, argp, 2 * sizeof (short) + 2 * sizeof(struct fbcurpos)); ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos)); ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int)); ret |= get_user(addr, &argp->cmap.red); ret |= put_user(compat_ptr(addr), &p->cmap.red); ret |= get_user(addr, &argp->cmap.green); ret |= put_user(compat_ptr(addr), &p->cmap.green); ret |= get_user(addr, &argp->cmap.blue); ret |= put_user(compat_ptr(addr), &p->cmap.blue); ret |= get_user(addr, &argp->mask); ret |= put_user(compat_ptr(addr), &p->mask); ret |= get_user(addr, &argp->image); ret |= put_user(compat_ptr(addr), &p->image); if (ret) return -EFAULT; return info->fbops->fb_ioctl(file->f_dentry->d_inode, file, FBIOSCURSOR, (unsigned long)p, info); } long sbusfb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg, struct fb_info *info) { switch (cmd) { case FBIOGTYPE: case FBIOSATTR: case FBIOGATTR: case FBIOSVIDEO: case FBIOGVIDEO: case FBIOGCURSOR32: /* This is not implemented yet. Later it should be converted... */ case FBIOSCURPOS: case FBIOGCURPOS: case FBIOGCURMAX: return info->fbops->fb_ioctl(file->f_dentry->d_inode, file, cmd, arg, info); case FBIOPUTCMAP32: return fbiogetputcmap(file, info, cmd, arg); case FBIOGETCMAP32: return fbiogetputcmap(file, info, cmd, arg); case FBIOSCURSOR32: return fbiogscursor(file, info, arg); default: return -ENOIOCTLCMD; } } EXPORT_SYMBOL(sbusfb_compat_ioctl); #endif