diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/mxm/mxms.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/mxm/mxms.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/mxms.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/mxms.c new file mode 100644 index 000000000000..4bde7f7f7b81 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/mxms.c @@ -0,0 +1,193 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#include <subdev/mxm.h> +#include "mxms.h" + +#define ROM16(x) le16_to_cpu(*(u16 *)&(x)) +#define ROM32(x) le32_to_cpu(*(u32 *)&(x)) + +static u8 * +mxms_data(struct nouveau_mxm *mxm) +{ + return mxm->mxms; + +} + +u16 +mxms_version(struct nouveau_mxm *mxm) +{ + u8 *mxms = mxms_data(mxm); + u16 version = (mxms[4] << 8) | mxms[5]; + switch (version ) { + case 0x0200: + case 0x0201: + case 0x0300: + return version; + default: + break; + } + + nv_debug(mxm, "unknown version %d.%d\n", mxms[4], mxms[5]); + return 0x0000; +} + +u16 +mxms_headerlen(struct nouveau_mxm *mxm) +{ + return 8; +} + +u16 +mxms_structlen(struct nouveau_mxm *mxm) +{ + return *(u16 *)&mxms_data(mxm)[6]; +} + +bool +mxms_checksum(struct nouveau_mxm *mxm) +{ + u16 size = mxms_headerlen(mxm) + mxms_structlen(mxm); + u8 *mxms = mxms_data(mxm), sum = 0; + while (size--) + sum += *mxms++; + if (sum) { + nv_debug(mxm, "checksum invalid\n"); + return false; + } + return true; +} + +bool +mxms_valid(struct nouveau_mxm *mxm) +{ + u8 *mxms = mxms_data(mxm); + if (*(u32 *)mxms != 0x5f4d584d) { + nv_debug(mxm, "signature invalid\n"); + return false; + } + + if (!mxms_version(mxm) || !mxms_checksum(mxm)) + return false; + + return true; +} + +bool +mxms_foreach(struct nouveau_mxm *mxm, u8 types, + bool (*exec)(struct nouveau_mxm *, u8 *, void *), void *info) +{ + u8 *mxms = mxms_data(mxm); + u8 *desc = mxms + mxms_headerlen(mxm); + u8 *fini = desc + mxms_structlen(mxm) - 1; + while (desc < fini) { + u8 type = desc[0] & 0x0f; + u8 headerlen = 0; + u8 recordlen = 0; + u8 entries = 0; + + switch (type) { + case 0: /* Output Device Structure */ + if (mxms_version(mxm) >= 0x0300) + headerlen = 8; + else + headerlen = 6; + break; + case 1: /* System Cooling Capability Structure */ + case 2: /* Thermal Structure */ + case 3: /* Input Power Structure */ + headerlen = 4; + break; + case 4: /* GPIO Device Structure */ + headerlen = 4; + recordlen = 2; + entries = (ROM32(desc[0]) & 0x01f00000) >> 20; + break; + case 5: /* Vendor Specific Structure */ + headerlen = 8; + break; + case 6: /* Backlight Control Structure */ + if (mxms_version(mxm) >= 0x0300) { + headerlen = 4; + recordlen = 8; + entries = (desc[1] & 0xf0) >> 4; + } else { + headerlen = 8; + } + break; + case 7: /* Fan Control Structure */ + headerlen = 8; + recordlen = 4; + entries = desc[1] & 0x07; + break; + default: + nv_debug(mxm, "unknown descriptor type %d\n", type); + return false; + } + + if (nv_subdev(mxm)->debug >= NV_DBG_DEBUG && (exec == NULL)) { + static const char * mxms_desc_name[] = { + "ODS", "SCCS", "TS", "IPS", + "GSD", "VSS", "BCS", "FCS", + }; + u8 *dump = desc; + int i, j; + + nv_debug(mxm, "%4s: ", mxms_desc_name[type]); + for (j = headerlen - 1; j >= 0; j--) + pr_cont("%02x", dump[j]); + pr_cont("\n"); + dump += headerlen; + + for (i = 0; i < entries; i++, dump += recordlen) { + nv_debug(mxm, " "); + for (j = recordlen - 1; j >= 0; j--) + pr_cont("%02x", dump[j]); + pr_cont("\n"); + } + } + + if (types & (1 << type)) { + if (!exec(mxm, desc, info)) + return false; + } + + desc += headerlen + (entries * recordlen); + } + + return true; +} + +void +mxms_output_device(struct nouveau_mxm *mxm, u8 *pdata, struct mxms_odev *desc) +{ + u64 data = ROM32(pdata[0]); + if (mxms_version(mxm) >= 0x0300) + data |= (u64)ROM16(pdata[4]) << 32; + + desc->outp_type = (data & 0x00000000000000f0ULL) >> 4; + desc->ddc_port = (data & 0x0000000000000f00ULL) >> 8; + desc->conn_type = (data & 0x000000000001f000ULL) >> 12; + desc->dig_conn = (data & 0x0000000000780000ULL) >> 19; +} |