2 * Copyright 2012 Red Hat Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
24 #include <subdev/bios.h>
25 #include <subdev/bios/dcb.h>
26 #include <subdev/bios/i2c.h>
29 dcb_i2c_table(struct nvkm_bios
*bios
, u8
*ver
, u8
*hdr
, u8
*cnt
, u8
*len
)
32 u16 dcb
= dcb_table(bios
, ver
, hdr
, cnt
, len
);
35 i2c
= nv_ro16(bios
, dcb
+ 2);
37 i2c
= nv_ro16(bios
, dcb
+ 4);
40 if (i2c
&& *ver
>= 0x42) {
41 nv_warn(bios
, "ccb %02x not supported\n", *ver
);
45 if (i2c
&& *ver
>= 0x30) {
46 *ver
= nv_ro08(bios
, i2c
+ 0);
47 *hdr
= nv_ro08(bios
, i2c
+ 1);
48 *cnt
= nv_ro08(bios
, i2c
+ 2);
49 *len
= nv_ro08(bios
, i2c
+ 3);
51 *ver
= *ver
; /* use DCB version */
61 dcb_i2c_entry(struct nvkm_bios
*bios
, u8 idx
, u8
*ver
, u8
*len
)
64 u16 i2c
= dcb_i2c_table(bios
, ver
, &hdr
, &cnt
, len
);
66 return i2c
+ hdr
+ (idx
* *len
);
71 dcb_i2c_parse(struct nvkm_bios
*bios
, u8 idx
, struct dcb_i2c_entry
*info
)
74 u16 ent
= dcb_i2c_entry(bios
, idx
, &ver
, &len
);
77 u32 ent_value
= nv_ro32(bios
, ent
);
78 u8 i2c_port
= (ent_value
>> 27) & 0x1f;
79 u8 dpaux_port
= (ent_value
>> 22) & 0x1f;
80 /* value 0x1f means unused according to DCB 4.x spec */
81 if (i2c_port
== 0x1f && dpaux_port
== 0x1f)
82 info
->type
= DCB_I2C_UNUSED
;
84 info
->type
= DCB_I2C_PMGR
;
87 info
->type
= nv_ro08(bios
, ent
+ 0x03);
89 info
->type
= nv_ro08(bios
, ent
+ 0x03) & 0x07;
90 if (info
->type
== 0x07)
91 info
->type
= DCB_I2C_UNUSED
;
94 info
->drive
= DCB_I2C_UNUSED
;
95 info
->sense
= DCB_I2C_UNUSED
;
96 info
->share
= DCB_I2C_UNUSED
;
97 info
->auxch
= DCB_I2C_UNUSED
;
100 case DCB_I2C_NV04_BIT
:
101 info
->drive
= nv_ro08(bios
, ent
+ 0);
102 info
->sense
= nv_ro08(bios
, ent
+ 1);
104 case DCB_I2C_NV4E_BIT
:
105 info
->drive
= nv_ro08(bios
, ent
+ 1);
107 case DCB_I2C_NVIO_BIT
:
108 info
->drive
= nv_ro08(bios
, ent
+ 0) & 0x0f;
109 if (nv_ro08(bios
, ent
+ 1) & 0x01)
110 info
->share
= nv_ro08(bios
, ent
+ 1) >> 1;
112 case DCB_I2C_NVIO_AUX
:
113 info
->auxch
= nv_ro08(bios
, ent
+ 0) & 0x0f;
114 if (nv_ro08(bios
, ent
+ 1) & 0x01)
115 info
->share
= info
->auxch
;
118 info
->drive
= (nv_ro16(bios
, ent
+ 0) & 0x01f) >> 0;
119 if (info
->drive
== 0x1f)
120 info
->drive
= DCB_I2C_UNUSED
;
121 info
->auxch
= (nv_ro16(bios
, ent
+ 0) & 0x3e0) >> 5;
122 if (info
->auxch
== 0x1f)
123 info
->auxch
= DCB_I2C_UNUSED
;
124 info
->share
= info
->auxch
;
129 nv_warn(bios
, "unknown i2c type %d\n", info
->type
);
130 info
->type
= DCB_I2C_UNUSED
;
135 if (bios
->bmp_offset
&& idx
< 2) {
136 /* BMP (from v4.0 has i2c info in the structure, it's in a
137 * fixed location on earlier VBIOS
139 if (nv_ro08(bios
, bios
->bmp_offset
+ 5) < 4)
142 ent
= 0x0036 + bios
->bmp_offset
;
145 info
->drive
= nv_ro08(bios
, ent
+ 4);
146 if (!info
->drive
) info
->drive
= 0x3f;
147 info
->sense
= nv_ro08(bios
, ent
+ 5);
148 if (!info
->sense
) info
->sense
= 0x3e;
151 info
->drive
= nv_ro08(bios
, ent
+ 6);
152 if (!info
->drive
) info
->drive
= 0x37;
153 info
->sense
= nv_ro08(bios
, ent
+ 7);
154 if (!info
->sense
) info
->sense
= 0x36;
157 info
->type
= DCB_I2C_NV04_BIT
;
158 info
->share
= DCB_I2C_UNUSED
;
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