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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_M0205.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_M0205.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/M0205.h>
     32 
     33 u32
     34 nvbios_M0205Te(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 > 0x08)
     42 			data = nvbios_rd32(bios, bit_M.offset + 0x05);
     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 = nvbios_rd08(bios, data + 0x04);
     51 				*cnt = nvbios_rd08(bios, data + 0x05);
     52 				return data;
     53 			default:
     54 				break;
     55 			}
     56 		}
     57 	}
     58 
     59 	return 0x00000000;
     60 }
     61 
     62 u32
     63 nvbios_M0205Tp(struct nvkm_bios *bios,
     64 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
     65 	       struct nvbios_M0205T *info)
     66 {
     67 	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
     68 	memset(info, 0x00, sizeof(*info));
     69 	switch (!!data * *ver) {
     70 	case 0x10:
     71 		info->freq = nvbios_rd16(bios, data + 0x06);
     72 		break;
     73 	default:
     74 		break;
     75 	}
     76 	return data;
     77 }
     78 
     79 u32
     80 nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
     81 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
     82 {
     83 	u8  snr, ssz;
     84 	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
     85 	if (data && idx < *cnt) {
     86 		data = data + *hdr + idx * (*len + (snr * ssz));
     87 		*hdr = *len;
     88 		*cnt = snr;
     89 		*len = ssz;
     90 		return data;
     91 	}
     92 	return 0x00000000;
     93 }
     94 
     95 u32
     96 nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
     97 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
     98 	       struct nvbios_M0205E *info)
     99 {
    100 	u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
    101 	memset(info, 0x00, sizeof(*info));
    102 	switch (!!data * *ver) {
    103 	case 0x10:
    104 		info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
    105 		return data;
    106 	default:
    107 		break;
    108 	}
    109 	return 0x00000000;
    110 }
    111 
    112 u32
    113 nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
    114 {
    115 
    116 	u8  cnt, len;
    117 	u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
    118 	if (data && idx < cnt) {
    119 		data = data + *hdr + idx * len;
    120 		*hdr = len;
    121 		return data;
    122 	}
    123 	return 0x00000000;
    124 }
    125 
    126 u32
    127 nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
    128 	       struct nvbios_M0205S *info)
    129 {
    130 	u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
    131 	memset(info, 0x00, sizeof(*info));
    132 	switch (!!data * *ver) {
    133 	case 0x10:
    134 		info->data = nvbios_rd08(bios, data + 0x00);
    135 		return data;
    136 	default:
    137 		break;
    138 	}
    139 	return 0x00000000;
    140 }
    141