text: /*
   * Copyright 2012 Red Hat Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   */
  
  #include "priv.h"
  
  static u32
  prom_read(void *data, u32 offset, u32 length, struct nouveau_bios *bios)
  {
  	u32 i;
  	if (offset + length <= 0x00100000) {
  		for (i = offset; i < offset + length; i += 4)
  			*(u32 *)&bios->data[i] = nv_rd32(bios, 0x300000 + i);
  		return length;
  	}
  	return 0;
  }
  
  static void
  prom_fini(void *data)
  {
  	struct nouveau_bios *bios = data;
  	if (nv_device(bios)->card_type < NV_50)
  		nv_mask(bios, 0x001850, 0x00000001, 0x00000001);
  	else
  		nv_mask(bios, 0x088050, 0x00000001, 0x00000001);
  }
  
  static void *
  prom_init(struct nouveau_bios *bios, const char *name)
  {
  	if (nv_device(bios)->card_type < NV_50) {
  		if (nv_device(bios)->card_type == NV_40 &&
  		    nv_device(bios)->chipset >= 0x4c)
  			return ERR_PTR(-ENODEV);
  		nv_mask(bios, 0x001850, 0x00000001, 0x00000000);
  	} else {
  		nv_mask(bios, 0x088050, 0x00000001, 0x00000000);
  	}
  	return bios;
  }
  
  const struct nvbios_source
  nvbios_rom = {
  	.name = "PROM",
  	.init = prom_init,
  	.fini = prom_fini,
  	.read = prom_read,
  	.rw = false,
  };
  