Get Hardware Registers Information
更新时间： 2026/08/06
在Gitcode上查看源码Get Hardware Registers Information
Change History
| openUBMC Version | Revision Date | Description |
|---|---|---|
| 25.06 | 2025/06/26 | Initial draft: add command details |
Basic Information
Function Description
Query the hardware register information.
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ReadOnly
Command Information
Request Information
| Byte | Data Field |
|---|---|
| NetFn | 30h |
| CMD | 92h |
| 1:3 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
| 4 | Sub command, subcommand = 22h |
| 5 | Type (hardware protocol type) 1: CPLD 2: GPIO 3: I2C 4: EDMA 5: CPLD-I2C Other: reserved |
| 6 | Chip ID When Byte5 is 1 (CPLD), the default value is 1. When there are multiple CPLDs, the value can be changed as required. When Byte 5 is set to 2 (GPIO), the default value is 1. When Byte 5 is 3 (I2C), it indicates the bus ID. That is, if I2C_1 is used, this field is filled with 1. When Byte5 is set to 4 (EDMA), this field is set to 0. When Byte5 is 5 (CPLD-I2C), this field indicates slot_id. |
| 7:8 | Addr (component address), LS-byte first This field is valid only when BYTE5 is set to 3. In other cases, the default value 0 is used. |
| 9:10 | Offset (offset), LS-byte first 01 00: indicates one byte offset. When Byte 5 is 5 (CPLD-I2C), this field indicates the CMD issued to the chip. |
| 11 | Length (length of the data to be read, 1-32 bytes) |
| (12) | Total length of the extended byte |
| (13) | Bus ID of the level-1 PCA9545 input connection. This field is valid when Byte5 is 3. |
| (14:15) | Level-1 PCA9545 Addr (component address). This field is valid when LS-byte first Byte5 is 3. |
| (16) | Bus ID of the level-2 PCA9545 input connection. This field is valid when Byte5 is 3. |
| (17:18) | Level-2 PCA9545 Addr (component address). This field is valid when LS-byte first Byte5 is 3. |
| (19) | Bus ID of the level-3 PCA9545 input connection. This field is valid when Byte5 is 3. |
| (20:21) | Level-3 PCA9545 Addr (component address). This field is valid when LS-byte first Byte5 is 3. |
| ... | ... (Currently, a maximum of eight levels are supported.) |
Response Information
| Byte | Data Field |
|---|---|
| 1 | Completion Code |
| 2:4 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
| 5:N | Data. The length of the returned data may be less than or equal to the length of the read data. |
Command Example
Query CPLD register configurations.
Request:
bash
ipmicmd -k "0f 00 30 92 DB 07 00 22 01 01 00 00 32 00 01" smi 0Response:
text
0f 31 00 92 00 db 07 00 02