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      1 /*	$NetBSD: nouveau_nvkm_subdev_devinit_nv10.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_nv10.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 nv10_devinit_meminit(struct nvkm_devinit *init)
     39 {
     40 	struct nvkm_subdev *subdev = &init->subdev;
     41 	struct nvkm_device *device = subdev->device;
     42 	static const int mem_width[] = { 0x10, 0x00, 0x20 };
     43 	int mem_width_count;
     44 	uint32_t patt = 0xdeadbeef;
     45 	struct io_mapping *fb;
     46 	int i, j, k;
     47 
     48 	if (device->card_type >= NV_11 && device->chipset >= 0x17)
     49 		mem_width_count = 3;
     50 	else
     51 		mem_width_count = 2;
     52 
     53 	/* Map the framebuffer aperture */
     54 	fb = fbmem_init(device);
     55 	if (!fb) {
     56 		nvkm_error(subdev, "failed to map fb\n");
     57 		return;
     58 	}
     59 
     60 	nvkm_wr32(device, NV10_PFB_REFCTRL, NV10_PFB_REFCTRL_VALID_1);
     61 
     62 	/* Probe memory bus width */
     63 	for (i = 0; i < mem_width_count; i++) {
     64 		nvkm_mask(device, NV04_PFB_CFG0, 0x30, mem_width[i]);
     65 
     66 		for (j = 0; j < 4; j++) {
     67 			for (k = 0; k < 4; k++)
     68 				fbmem_poke(fb, 0x1c, 0);
     69 
     70 			fbmem_poke(fb, 0x1c, patt);
     71 			fbmem_poke(fb, 0x3c, 0);
     72 
     73 			if (fbmem_peek(fb, 0x1c) == patt)
     74 				goto mem_width_found;
     75 		}
     76 	}
     77 
     78 mem_width_found:
     79 	patt <<= 1;
     80 
     81 	/* Probe amount of installed memory */
     82 	for (i = 0; i < 4; i++) {
     83 		int off = nvkm_rd32(device, 0x10020c) - 0x100000;
     84 
     85 		fbmem_poke(fb, off, patt);
     86 		fbmem_poke(fb, 0, 0);
     87 
     88 		fbmem_peek(fb, 0);
     89 		fbmem_peek(fb, 0);
     90 		fbmem_peek(fb, 0);
     91 		fbmem_peek(fb, 0);
     92 
     93 		if (fbmem_peek(fb, off) == patt)
     94 			goto amount_found;
     95 	}
     96 
     97 	/* IC missing - disable the upper half memory space. */
     98 	nvkm_mask(device, NV04_PFB_CFG0, 0x1000, 0);
     99 
    100 amount_found:
    101 	fbmem_fini(fb);
    102 }
    103 
    104 static const struct nvkm_devinit_func
    105 nv10_devinit = {
    106 	.dtor = nv04_devinit_dtor,
    107 	.preinit = nv04_devinit_preinit,
    108 	.post = nv04_devinit_post,
    109 	.meminit = nv10_devinit_meminit,
    110 	.pll_set = nv04_devinit_pll_set,
    111 };
    112 
    113 int
    114 nv10_devinit_new(struct nvkm_device *device, int index,
    115 		 struct nvkm_devinit **pinit)
    116 {
    117 	return nv04_devinit_new_(&nv10_devinit, device, index, pinit);
    118 }
    119