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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_M0209.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_M0209.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
     28 
     29 #include <subdev/bios.h>
     30 #include <subdev/bios/bit.h>
     31 #include <subdev/bios/M0209.h>
     32 
     33 u32
     34 nvbios_M0209Te(struct nvkm_bios *bios,
     35 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
     36 {
     37 	struct bit_entry bit_M;
     38 	u32 data = 0x00000000;
     39 
     40 	if (!bit_entry(bios, 'M', &bit_M)) {
     41 		if (bit_M.version == 2 && bit_M.length > 0x0c)
     42 			data = nvbios_rd32(bios, bit_M.offset + 0x09);
     43 		if (data) {
     44 			*ver = nvbios_rd08(bios, data + 0x00);
     45 			switch (*ver) {
     46 			case 0x10:
     47 				*hdr = nvbios_rd08(bios, data + 0x01);
     48 				*len = nvbios_rd08(bios, data + 0x02);
     49 				*ssz = nvbios_rd08(bios, data + 0x03);
     50 				*snr = 1;
     51 				*cnt = nvbios_rd08(bios, data + 0x04);
     52 				return data;
     53 			default:
     54 				break;
     55 			}
     56 		}
     57 	}
     58 
     59 	return 0x00000000;
     60 }
     61 
     62 u32
     63 nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
     64 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     65 {
     66 	u8  snr, ssz;
     67 	u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
     68 	if (data && idx < *cnt) {
     69 		data = data + *hdr + idx * (*len + (snr * ssz));
     70 		*hdr = *len;
     71 		*cnt = snr;
     72 		*len = ssz;
     73 		return data;
     74 	}
     75 	return 0x00000000;
     76 }
     77 
     78 u32
     79 nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
     80 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
     81 {
     82 	u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
     83 	memset(info, 0x00, sizeof(*info));
     84 	switch (!!data * *ver) {
     85 	case 0x10:
     86 		info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
     87 		info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
     88 		info->modulo =  nvbios_rd08(bios, data + 0x01);
     89 		info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
     90 		info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
     91 		info->v03    =  nvbios_rd08(bios, data + 0x03);
     92 		return data;
     93 	default:
     94 		break;
     95 	}
     96 	return 0x00000000;
     97 }
     98 
     99 u32
    100 nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
    101 {
    102 
    103 	u8  cnt, len;
    104 	u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
    105 	if (data && idx < cnt) {
    106 		data = data + *hdr + idx * len;
    107 		*hdr = len;
    108 		return data;
    109 	}
    110 	return 0x00000000;
    111 }
    112 
    113 u32
    114 nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
    115 	       struct nvbios_M0209S *info)
    116 {
    117 	struct nvbios_M0209E M0209E;
    118 	u8  cnt, len;
    119 	u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
    120 	if (data) {
    121 		u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
    122 		memset(info, 0x00, sizeof(*info));
    123 		switch (!!data * *ver) {
    124 		case 0x10:
    125 			for (i = 0; i < ARRAY_SIZE(info->data); i++) {
    126 				u32 bits = (i % M0209E.modulo) * M0209E.bits;
    127 				u32 mask = (1ULL << M0209E.bits) - 1;
    128 				u16  off = bits / 8;
    129 				u8   mod = bits % 8;
    130 				info->data[i] = nvbios_rd32(bios, data + off);
    131 				info->data[i] = info->data[i] >> mod;
    132 				info->data[i] = info->data[i] & mask;
    133 			}
    134 			return data;
    135 		default:
    136 			break;
    137 		}
    138 	}
    139 	return 0x00000000;
    140 }
    141