269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* sbuslib.c: Helper library for SBUS framebuffer drivers.
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*
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* Copyright (C) 2003 David S. Miller (davem@redhat.com)
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*/
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#include <linux/compat.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/fb.h>
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#include <linux/mm.h>
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#include <linux/uaccess.h>
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#include <linux/of_device.h>
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#include <asm/fbio.h>
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#include "sbuslib.h"
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void sbusfb_fill_var(struct fb_var_screeninfo *var, struct device_node *dp,
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int bpp)
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{
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memset(var, 0, sizeof(*var));
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var->xres = of_getintprop_default(dp, "width", 1152);
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var->yres = of_getintprop_default(dp, "height", 900);
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var->xres_virtual = var->xres;
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var->yres_virtual = var->yres;
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var->bits_per_pixel = bpp;
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}
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EXPORT_SYMBOL(sbusfb_fill_var);
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static unsigned long sbusfb_mmapsize(long size, unsigned long fbsize)
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{
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if (size == SBUS_MMAP_EMPTY) return 0;
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if (size >= 0) return size;
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return fbsize * (-size);
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}
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int sbusfb_mmap_helper(struct sbus_mmap_map *map,
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unsigned long physbase,
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unsigned long fbsize,
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unsigned long iospace,
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struct vm_area_struct *vma)
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{
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unsigned int size, page, r, map_size;
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unsigned long map_offset = 0;
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unsigned long off;
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int i;
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if (!(vma->vm_flags & (VM_SHARED | VM_MAYSHARE)))
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return -EINVAL;
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size = vma->vm_end - vma->vm_start;
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if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
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return -EINVAL;
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off = vma->vm_pgoff << PAGE_SHIFT;
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/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
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vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
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/* Each page, see which map applies */
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for (page = 0; page < size; ){
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map_size = 0;
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for (i = 0; map[i].size; i++)
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if (map[i].voff == off+page) {
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map_size = sbusfb_mmapsize(map[i].size, fbsize);
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#ifdef __sparc_v9__
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#define POFF_MASK (PAGE_MASK|0x1UL)
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#else
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#define POFF_MASK (PAGE_MASK)
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#endif
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map_offset = (physbase + map[i].poff) & POFF_MASK;
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break;
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}
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if (!map_size) {
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page += PAGE_SIZE;
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continue;
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}
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if (page + map_size > size)
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map_size = size - page;
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r = io_remap_pfn_range(vma,
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vma->vm_start + page,
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MK_IOSPACE_PFN(iospace,
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map_offset >> PAGE_SHIFT),
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map_size,
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vma->vm_page_prot);
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if (r)
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return -EAGAIN;
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page += map_size;
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}
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return 0;
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}
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EXPORT_SYMBOL(sbusfb_mmap_helper);
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int sbusfb_ioctl_helper(unsigned long cmd, unsigned long arg,
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struct fb_info *info,
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int type, int fb_depth, unsigned long fb_size)
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{
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switch(cmd) {
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case FBIOGTYPE: {
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struct fbtype __user *f = (struct fbtype __user *) arg;
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if (put_user(type, &f->fb_type) ||
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put_user(info->var.yres, &f->fb_height) ||
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put_user(info->var.xres, &f->fb_width) ||
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put_user(fb_depth, &f->fb_depth) ||
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put_user(0, &f->fb_cmsize) ||
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put_user(fb_size, &f->fb_cmsize))
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return -EFAULT;
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return 0;
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}
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case FBIOPUTCMAP_SPARC: {
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struct fbcmap __user *c = (struct fbcmap __user *) arg;
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struct fb_cmap cmap;
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u16 red, green, blue;
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u8 red8, green8, blue8;
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unsigned char __user *ured;
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unsigned char __user *ugreen;
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unsigned char __user *ublue;
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unsigned int index, count, i;
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if (get_user(index, &c->index) ||
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get_user(count, &c->count) ||
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get_user(ured, &c->red) ||
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get_user(ugreen, &c->green) ||
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get_user(ublue, &c->blue))
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return -EFAULT;
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cmap.len = 1;
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cmap.red = &red;
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cmap.green = &green;
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cmap.blue = &blue;
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cmap.transp = NULL;
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for (i = 0; i < count; i++) {
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int err;
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if (get_user(red8, &ured[i]) ||
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get_user(green8, &ugreen[i]) ||
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get_user(blue8, &ublue[i]))
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return -EFAULT;
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red = red8 << 8;
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green = green8 << 8;
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blue = blue8 << 8;
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cmap.start = index + i;
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err = fb_set_cmap(&cmap, info);
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if (err)
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return err;
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}
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return 0;
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}
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case FBIOGETCMAP_SPARC: {
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struct fbcmap __user *c = (struct fbcmap __user *) arg;
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unsigned char __user *ured;
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unsigned char __user *ugreen;
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unsigned char __user *ublue;
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struct fb_cmap *cmap = &info->cmap;
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unsigned int index, count, i;
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u8 red, green, blue;
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if (get_user(index, &c->index) ||
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get_user(count, &c->count) ||
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get_user(ured, &c->red) ||
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get_user(ugreen, &c->green) ||
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get_user(ublue, &c->blue))
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return -EFAULT;
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if (index > cmap->len || count > cmap->len - index)
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return -EINVAL;
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for (i = 0; i < count; i++) {
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red = cmap->red[index + i] >> 8;
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green = cmap->green[index + i] >> 8;
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blue = cmap->blue[index + i] >> 8;
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if (put_user(red, &ured[i]) ||
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put_user(green, &ugreen[i]) ||
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put_user(blue, &ublue[i]))
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return -EFAULT;
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}
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return 0;
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}
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default:
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return -EINVAL;
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}
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}
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EXPORT_SYMBOL(sbusfb_ioctl_helper);
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#ifdef CONFIG_COMPAT
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static int fbiogetputcmap(struct fb_info *info, unsigned int cmd, unsigned long arg)
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{
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struct fbcmap32 __user *argp = (void __user *)arg;
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struct fbcmap __user *p = compat_alloc_user_space(sizeof(*p));
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u32 addr;
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int ret;
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ret = copy_in_user(p, argp, 2 * sizeof(int));
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ret |= get_user(addr, &argp->red);
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ret |= put_user(compat_ptr(addr), &p->red);
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ret |= get_user(addr, &argp->green);
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ret |= put_user(compat_ptr(addr), &p->green);
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ret |= get_user(addr, &argp->blue);
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ret |= put_user(compat_ptr(addr), &p->blue);
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if (ret)
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return -EFAULT;
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return info->fbops->fb_ioctl(info,
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(cmd == FBIOPUTCMAP32) ?
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FBIOPUTCMAP_SPARC : FBIOGETCMAP_SPARC,
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(unsigned long)p);
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}
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static int fbiogscursor(struct fb_info *info, unsigned long arg)
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{
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struct fbcursor __user *p = compat_alloc_user_space(sizeof(*p));
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struct fbcursor32 __user *argp = (void __user *)arg;
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compat_uptr_t addr;
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int ret;
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ret = copy_in_user(p, argp,
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2 * sizeof (short) + 2 * sizeof(struct fbcurpos));
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ret |= copy_in_user(&p->size, &argp->size, sizeof(struct fbcurpos));
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ret |= copy_in_user(&p->cmap, &argp->cmap, 2 * sizeof(int));
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ret |= get_user(addr, &argp->cmap.red);
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ret |= put_user(compat_ptr(addr), &p->cmap.red);
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ret |= get_user(addr, &argp->cmap.green);
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ret |= put_user(compat_ptr(addr), &p->cmap.green);
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ret |= get_user(addr, &argp->cmap.blue);
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ret |= put_user(compat_ptr(addr), &p->cmap.blue);
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ret |= get_user(addr, &argp->mask);
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ret |= put_user(compat_ptr(addr), &p->mask);
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ret |= get_user(addr, &argp->image);
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ret |= put_user(compat_ptr(addr), &p->image);
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if (ret)
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return -EFAULT;
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return info->fbops->fb_ioctl(info, FBIOSCURSOR, (unsigned long)p);
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}
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int sbusfb_compat_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
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{
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switch (cmd) {
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case FBIOGTYPE:
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case FBIOSATTR:
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case FBIOGATTR:
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case FBIOSVIDEO:
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case FBIOGVIDEO:
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case FBIOGCURSOR32: /* This is not implemented yet.
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Later it should be converted... */
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case FBIOSCURPOS:
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case FBIOGCURPOS:
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case FBIOGCURMAX:
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return info->fbops->fb_ioctl(info, cmd, arg);
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case FBIOPUTCMAP32:
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return fbiogetputcmap(info, cmd, arg);
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case FBIOGETCMAP32:
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return fbiogetputcmap(info, cmd, arg);
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case FBIOSCURSOR32:
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return fbiogscursor(info, arg);
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default:
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return -ENOIOCTLCMD;
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}
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}
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EXPORT_SYMBOL(sbusfb_compat_ioctl);
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#endif
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