| /* |
| * 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/bios.h> |
| #include <subdev/bios/dcb.h> |
| #include <subdev/bios/i2c.h> |
| |
| u16 |
| dcb_i2c_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
| { |
| u16 i2c = 0x0000; |
| u16 dcb = dcb_table(bios, ver, hdr, cnt, len); |
| if (dcb) { |
| if (*ver >= 0x15) |
| i2c = nv_ro16(bios, dcb + 2); |
| if (*ver >= 0x30) |
| i2c = nv_ro16(bios, dcb + 4); |
| } |
| |
| if (i2c && *ver >= 0x42) { |
| nv_warn(bios, "ccb %02x not supported\n", *ver); |
| return 0x0000; |
| } |
| |
| if (i2c && *ver >= 0x30) { |
| *ver = nv_ro08(bios, i2c + 0); |
| *hdr = nv_ro08(bios, i2c + 1); |
| *cnt = nv_ro08(bios, i2c + 2); |
| *len = nv_ro08(bios, i2c + 3); |
| } else { |
| *ver = *ver; /* use DCB version */ |
| *hdr = 0; |
| *cnt = 16; |
| *len = 4; |
| } |
| |
| return i2c; |
| } |
| |
| u16 |
| dcb_i2c_entry(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len) |
| { |
| u8 hdr, cnt; |
| u16 i2c = dcb_i2c_table(bios, ver, &hdr, &cnt, len); |
| if (i2c && idx < cnt) |
| return i2c + hdr + (idx * *len); |
| return 0x0000; |
| } |
| |
| int |
| dcb_i2c_parse(struct nvkm_bios *bios, u8 idx, struct dcb_i2c_entry *info) |
| { |
| u8 ver, len; |
| u16 ent = dcb_i2c_entry(bios, idx, &ver, &len); |
| if (ent) { |
| if (ver >= 0x41) { |
| u32 ent_value = nv_ro32(bios, ent); |
| u8 i2c_port = (ent_value >> 27) & 0x1f; |
| u8 dpaux_port = (ent_value >> 22) & 0x1f; |
| /* value 0x1f means unused according to DCB 4.x spec */ |
| if (i2c_port == 0x1f && dpaux_port == 0x1f) |
| info->type = DCB_I2C_UNUSED; |
| else |
| info->type = DCB_I2C_PMGR; |
| } else |
| if (ver >= 0x30) { |
| info->type = nv_ro08(bios, ent + 0x03); |
| } else { |
| info->type = nv_ro08(bios, ent + 0x03) & 0x07; |
| if (info->type == 0x07) |
| info->type = DCB_I2C_UNUSED; |
| } |
| |
| info->drive = DCB_I2C_UNUSED; |
| info->sense = DCB_I2C_UNUSED; |
| info->share = DCB_I2C_UNUSED; |
| info->auxch = DCB_I2C_UNUSED; |
| |
| switch (info->type) { |
| case DCB_I2C_NV04_BIT: |
| info->drive = nv_ro08(bios, ent + 0); |
| info->sense = nv_ro08(bios, ent + 1); |
| return 0; |
| case DCB_I2C_NV4E_BIT: |
| info->drive = nv_ro08(bios, ent + 1); |
| return 0; |
| case DCB_I2C_NVIO_BIT: |
| info->drive = nv_ro08(bios, ent + 0) & 0x0f; |
| if (nv_ro08(bios, ent + 1) & 0x01) |
| info->share = nv_ro08(bios, ent + 1) >> 1; |
| return 0; |
| case DCB_I2C_NVIO_AUX: |
| info->auxch = nv_ro08(bios, ent + 0) & 0x0f; |
| if (nv_ro08(bios, ent + 1) & 0x01) |
| info->share = info->auxch; |
| return 0; |
| case DCB_I2C_PMGR: |
| info->drive = (nv_ro16(bios, ent + 0) & 0x01f) >> 0; |
| if (info->drive == 0x1f) |
| info->drive = DCB_I2C_UNUSED; |
| info->auxch = (nv_ro16(bios, ent + 0) & 0x3e0) >> 5; |
| if (info->auxch == 0x1f) |
| info->auxch = DCB_I2C_UNUSED; |
| info->share = info->auxch; |
| return 0; |
| case DCB_I2C_UNUSED: |
| return 0; |
| default: |
| nv_warn(bios, "unknown i2c type %d\n", info->type); |
| info->type = DCB_I2C_UNUSED; |
| return 0; |
| } |
| } |
| |
| if (bios->bmp_offset && idx < 2) { |
| /* BMP (from v4.0 has i2c info in the structure, it's in a |
| * fixed location on earlier VBIOS |
| */ |
| if (nv_ro08(bios, bios->bmp_offset + 5) < 4) |
| ent = 0x0048; |
| else |
| ent = 0x0036 + bios->bmp_offset; |
| |
| if (idx == 0) { |
| info->drive = nv_ro08(bios, ent + 4); |
| if (!info->drive) info->drive = 0x3f; |
| info->sense = nv_ro08(bios, ent + 5); |
| if (!info->sense) info->sense = 0x3e; |
| } else |
| if (idx == 1) { |
| info->drive = nv_ro08(bios, ent + 6); |
| if (!info->drive) info->drive = 0x37; |
| info->sense = nv_ro08(bios, ent + 7); |
| if (!info->sense) info->sense = 0x36; |
| } |
| |
| info->type = DCB_I2C_NV04_BIT; |
| info->share = DCB_I2C_UNUSED; |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |