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      1 /*	$NetBSD: nouveau_nvkm_subdev_devinit_nv20.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2010 Francisco Jerez.
      5  * All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining
      8  * a copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sublicense, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * The above copyright notice and this permission notice (including the
     16  * next paragraph) shall be included in all copies or substantial
     17  * portions of the Software.
     18  *
     19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     22  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     23  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     24  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     25  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     26  *
     27  */
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_devinit_nv20.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
     30 
     31 #include "nv04.h"
     32 #include "fbmem.h"
     33 
     34 #include <subdev/bios.h>
     35 #include <subdev/bios/init.h>
     36 
     37 static void
     38 nv20_devinit_meminit(struct nvkm_devinit *init)
     39 {
     40 	struct nvkm_subdev *subdev = &init->subdev;
     41 	struct nvkm_device *device = subdev->device;
     42 	uint32_t mask = (device->chipset >= 0x25 ? 0x300 : 0x900);
     43 	uint32_t amount, off;
     44 	struct io_mapping *fb;
     45 
     46 	/* Map the framebuffer aperture */
     47 	fb = fbmem_init(device);
     48 	if (!fb) {
     49 		nvkm_error(subdev, "failed to map fb\n");
     50 		return;
     51 	}
     52 
     53 	nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
     54 
     55 	/* Allow full addressing */
     56 	nvkm_mask(device, NV04_PFB_CFG0, 0, mask);
     57 
     58 	amount = nvkm_rd32(device, 0x10020c);
     59 	for (off = amount; off > 0x2000000; off -= 0x2000000)
     60 		fbmem_poke(fb, off - 4, off);
     61 
     62 	amount = nvkm_rd32(device, 0x10020c);
     63 	if (amount != fbmem_peek(fb, amount - 4))
     64 		/* IC missing - disable the upper half memory space. */
     65 		nvkm_mask(device, NV04_PFB_CFG0, mask, 0);
     66 
     67 	fbmem_fini(fb);
     68 }
     69 
     70 static const struct nvkm_devinit_func
     71 nv20_devinit = {
     72 	.dtor = nv04_devinit_dtor,
     73 	.preinit = nv04_devinit_preinit,
     74 	.post = nv04_devinit_post,
     75 	.meminit = nv20_devinit_meminit,
     76 	.pll_set = nv04_devinit_pll_set,
     77 };
     78 
     79 int
     80 nv20_devinit_new(struct nvkm_device *device, int index,
     81 		 struct nvkm_devinit **pinit)
     82 {
     83 	return nv04_devinit_new_(&nv20_devinit, device, index, pinit);
     84 }
     85