| 1 | /* $NetBSD: nouveau_subdev_mxm_mxms.c,v 1.2 2016/04/22 19:40:55 riastradh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2012 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 | |
| 27 | #include <sys/cdefs.h> |
| 28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_mxm_mxms.c,v 1.2 2016/04/22 19:40:55 riastradh Exp $" ); |
| 29 | |
| 30 | #include <subdev/mxm.h> |
| 31 | #include "mxms.h" |
| 32 | |
| 33 | #define ROM16(x) le16_to_cpu(*(u16 *)&(x)) |
| 34 | #define ROM32(x) le32_to_cpu(*(u32 *)&(x)) |
| 35 | |
| 36 | static u8 * |
| 37 | mxms_data(struct nouveau_mxm *mxm) |
| 38 | { |
| 39 | return mxm->mxms; |
| 40 | |
| 41 | } |
| 42 | |
| 43 | u16 |
| 44 | mxms_version(struct nouveau_mxm *mxm) |
| 45 | { |
| 46 | u8 *mxms = mxms_data(mxm); |
| 47 | u16 version = (mxms[4] << 8) | mxms[5]; |
| 48 | switch (version ) { |
| 49 | case 0x0200: |
| 50 | case 0x0201: |
| 51 | case 0x0300: |
| 52 | return version; |
| 53 | default: |
| 54 | break; |
| 55 | } |
| 56 | |
| 57 | nv_debug(mxm, "unknown version %d.%d\n" , mxms[4], mxms[5]); |
| 58 | return 0x0000; |
| 59 | } |
| 60 | |
| 61 | u16 |
| 62 | (struct nouveau_mxm *mxm) |
| 63 | { |
| 64 | return 8; |
| 65 | } |
| 66 | |
| 67 | u16 |
| 68 | mxms_structlen(struct nouveau_mxm *mxm) |
| 69 | { |
| 70 | return *(u16 *)&mxms_data(mxm)[6]; |
| 71 | } |
| 72 | |
| 73 | bool |
| 74 | mxms_checksum(struct nouveau_mxm *mxm) |
| 75 | { |
| 76 | u16 size = mxms_headerlen(mxm) + mxms_structlen(mxm); |
| 77 | u8 *mxms = mxms_data(mxm), sum = 0; |
| 78 | while (size--) |
| 79 | sum += *mxms++; |
| 80 | if (sum) { |
| 81 | nv_debug(mxm, "checksum invalid\n" ); |
| 82 | return false; |
| 83 | } |
| 84 | return true; |
| 85 | } |
| 86 | |
| 87 | bool |
| 88 | mxms_valid(struct nouveau_mxm *mxm) |
| 89 | { |
| 90 | u8 *mxms = mxms_data(mxm); |
| 91 | if (*(u32 *)mxms != 0x5f4d584d) { |
| 92 | nv_debug(mxm, "signature invalid\n" ); |
| 93 | return false; |
| 94 | } |
| 95 | |
| 96 | if (!mxms_version(mxm) || !mxms_checksum(mxm)) |
| 97 | return false; |
| 98 | |
| 99 | return true; |
| 100 | } |
| 101 | |
| 102 | bool |
| 103 | mxms_foreach(struct nouveau_mxm *mxm, u8 types, |
| 104 | bool (*exec)(struct nouveau_mxm *, u8 *, void *), void *info) |
| 105 | { |
| 106 | u8 *mxms = mxms_data(mxm); |
| 107 | u8 *desc = mxms + mxms_headerlen(mxm); |
| 108 | u8 *fini = desc + mxms_structlen(mxm) - 1; |
| 109 | while (desc < fini) { |
| 110 | u8 type = desc[0] & 0x0f; |
| 111 | u8 = 0; |
| 112 | u8 recordlen = 0; |
| 113 | u8 entries = 0; |
| 114 | |
| 115 | switch (type) { |
| 116 | case 0: /* Output Device Structure */ |
| 117 | if (mxms_version(mxm) >= 0x0300) |
| 118 | headerlen = 8; |
| 119 | else |
| 120 | headerlen = 6; |
| 121 | break; |
| 122 | case 1: /* System Cooling Capability Structure */ |
| 123 | case 2: /* Thermal Structure */ |
| 124 | case 3: /* Input Power Structure */ |
| 125 | headerlen = 4; |
| 126 | break; |
| 127 | case 4: /* GPIO Device Structure */ |
| 128 | headerlen = 4; |
| 129 | recordlen = 2; |
| 130 | entries = (ROM32(desc[0]) & 0x01f00000) >> 20; |
| 131 | break; |
| 132 | case 5: /* Vendor Specific Structure */ |
| 133 | headerlen = 8; |
| 134 | break; |
| 135 | case 6: /* Backlight Control Structure */ |
| 136 | if (mxms_version(mxm) >= 0x0300) { |
| 137 | headerlen = 4; |
| 138 | recordlen = 8; |
| 139 | entries = (desc[1] & 0xf0) >> 4; |
| 140 | } else { |
| 141 | headerlen = 8; |
| 142 | } |
| 143 | break; |
| 144 | case 7: /* Fan Control Structure */ |
| 145 | headerlen = 8; |
| 146 | recordlen = 4; |
| 147 | entries = desc[1] & 0x07; |
| 148 | break; |
| 149 | default: |
| 150 | nv_debug(mxm, "unknown descriptor type %d\n" , type); |
| 151 | return false; |
| 152 | } |
| 153 | |
| 154 | if (nv_subdev(mxm)->debug >= NV_DBG_DEBUG && (exec == NULL)) { |
| 155 | static const char * mxms_desc_name[] = { |
| 156 | "ODS" , "SCCS" , "TS" , "IPS" , |
| 157 | "GSD" , "VSS" , "BCS" , "FCS" , |
| 158 | }; |
| 159 | u8 *dump = desc; |
| 160 | int i, j; |
| 161 | |
| 162 | nv_debug(mxm, "%4s: " , mxms_desc_name[type]); |
| 163 | for (j = headerlen - 1; j >= 0; j--) |
| 164 | pr_cont("%02x" , dump[j]); |
| 165 | pr_cont("\n" ); |
| 166 | dump += headerlen; |
| 167 | |
| 168 | for (i = 0; i < entries; i++, dump += recordlen) { |
| 169 | nv_debug(mxm, " " ); |
| 170 | for (j = recordlen - 1; j >= 0; j--) |
| 171 | pr_cont("%02x" , dump[j]); |
| 172 | pr_cont("\n" ); |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | if ((types & (1 << type)) && (exec != NULL)) { |
| 177 | if (!exec(mxm, desc, info)) |
| 178 | return false; |
| 179 | } |
| 180 | |
| 181 | desc += headerlen + (entries * recordlen); |
| 182 | } |
| 183 | |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | void |
| 188 | mxms_output_device(struct nouveau_mxm *mxm, u8 *pdata, struct mxms_odev *desc) |
| 189 | { |
| 190 | u64 data = ROM32(pdata[0]); |
| 191 | if (mxms_version(mxm) >= 0x0300) |
| 192 | data |= (u64)ROM16(pdata[4]) << 32; |
| 193 | |
| 194 | desc->outp_type = (data & 0x00000000000000f0ULL) >> 4; |
| 195 | desc->ddc_port = (data & 0x0000000000000f00ULL) >> 8; |
| 196 | desc->conn_type = (data & 0x000000000001f000ULL) >> 12; |
| 197 | desc->dig_conn = (data & 0x0000000000780000ULL) >> 19; |
| 198 | } |
| 199 | |