| /* |
| * Copyright 2019 Advanced Micro Devices, 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. |
| * |
| */ |
| #include <linux/pci.h> |
| |
| #include "amdgpu.h" |
| #include "amdgpu_i2c.h" |
| #include "smu_v11_0_i2c.h" |
| #include "atom.h" |
| |
| #define I2C_PRODUCT_INFO_ADDR 0xAC |
| #define I2C_PRODUCT_INFO_ADDR_SIZE 0x2 |
| #define I2C_PRODUCT_INFO_OFFSET 0xC0 |
| |
| bool is_fru_eeprom_supported(struct amdgpu_device *adev) |
| { |
| /* TODO: Gaming SKUs don't have the FRU EEPROM. |
| * Use this hack to address hangs on modprobe on gaming SKUs |
| * until a proper solution can be implemented by only supporting |
| * the explicit chip IDs for VG20 Server cards |
| * |
| * TODO: Add list of supported Arcturus DIDs once confirmed |
| */ |
| if ((adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a0) || |
| (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a1) || |
| (adev->asic_type == CHIP_VEGA20 && adev->pdev->device == 0x66a4)) |
| return true; |
| return false; |
| } |
| |
| int amdgpu_fru_read_eeprom(struct amdgpu_device *adev, uint32_t addrptr, |
| unsigned char *buff) |
| { |
| int ret, size; |
| struct i2c_msg msg = { |
| .addr = I2C_PRODUCT_INFO_ADDR, |
| .flags = I2C_M_RD, |
| .buf = buff, |
| }; |
| buff[0] = 0; |
| buff[1] = addrptr; |
| msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + 1; |
| ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); |
| |
| if (ret < 1) { |
| DRM_WARN("FRU: Failed to get size field"); |
| return ret; |
| } |
| |
| /* The size returned by the i2c requires subtraction of 0xC0 since the |
| * size apparently always reports as 0xC0+actual size. |
| */ |
| size = buff[2] - I2C_PRODUCT_INFO_OFFSET; |
| /* Add 1 since address field was 1 byte */ |
| buff[1] = addrptr + 1; |
| |
| msg.len = I2C_PRODUCT_INFO_ADDR_SIZE + size; |
| ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); |
| |
| if (ret < 1) { |
| DRM_WARN("FRU: Failed to get data field"); |
| return ret; |
| } |
| |
| return size; |
| } |
| |
| int amdgpu_fru_get_product_info(struct amdgpu_device *adev) |
| { |
| unsigned char buff[34]; |
| int addrptr = 0, size = 0; |
| |
| if (!is_fru_eeprom_supported(adev)) |
| return 0; |
| |
| /* If algo exists, it means that the i2c_adapter's initialized */ |
| if (!adev->pm.smu_i2c.algo) { |
| DRM_WARN("Cannot access FRU, EEPROM accessor not initialized"); |
| return 0; |
| } |
| |
| /* There's a lot of repetition here. This is due to the FRU having |
| * variable-length fields. To get the information, we have to find the |
| * size of each field, and then keep reading along and reading along |
| * until we get all of the data that we want. We use addrptr to track |
| * the address as we go |
| */ |
| |
| /* The first fields are all of size 1-byte, from 0-7 are offsets that |
| * contain information that isn't useful to us. |
| * Bytes 8-a are all 1-byte and refer to the size of the entire struct, |
| * and the language field, so just start from 0xb, manufacturer size |
| */ |
| addrptr = 0xb; |
| size = amdgpu_fru_read_eeprom(adev, addrptr, buff); |
| if (size < 1) { |
| DRM_ERROR("Failed to read FRU Manufacturer, ret:%d", size); |
| return size; |
| } |
| |
| /* Increment the addrptr by the size of the field, and 1 due to the |
| * size field being 1 byte. This pattern continues below. |
| */ |
| addrptr += size + 1; |
| size = amdgpu_fru_read_eeprom(adev, addrptr, buff); |
| if (size < 1) { |
| DRM_ERROR("Failed to read FRU product name, ret:%d", size); |
| return size; |
| } |
| |
| /* Product name should only be 32 characters. Any more, |
| * and something could be wrong. Cap it at 32 to be safe |
| */ |
| if (size > 32) { |
| DRM_WARN("FRU Product Number is larger than 32 characters. This is likely a mistake"); |
| size = 32; |
| } |
| /* Start at 2 due to buff using fields 0 and 1 for the address */ |
| memcpy(adev->product_name, &buff[2], size); |
| adev->product_name[size] = '\0'; |
| |
| addrptr += size + 1; |
| size = amdgpu_fru_read_eeprom(adev, addrptr, buff); |
| if (size < 1) { |
| DRM_ERROR("Failed to read FRU product number, ret:%d", size); |
| return size; |
| } |
| |
| /* Product number should only be 16 characters. Any more, |
| * and something could be wrong. Cap it at 16 to be safe |
| */ |
| if (size > 16) { |
| DRM_WARN("FRU Product Number is larger than 16 characters. This is likely a mistake"); |
| size = 16; |
| } |
| memcpy(adev->product_number, &buff[2], size); |
| adev->product_number[size] = '\0'; |
| |
| addrptr += size + 1; |
| size = amdgpu_fru_read_eeprom(adev, addrptr, buff); |
| |
| if (size < 1) { |
| DRM_ERROR("Failed to read FRU product version, ret:%d", size); |
| return size; |
| } |
| |
| addrptr += size + 1; |
| size = amdgpu_fru_read_eeprom(adev, addrptr, buff); |
| |
| if (size < 1) { |
| DRM_ERROR("Failed to read FRU serial number, ret:%d", size); |
| return size; |
| } |
| |
| /* Serial number should only be 16 characters. Any more, |
| * and something could be wrong. Cap it at 16 to be safe |
| */ |
| if (size > 16) { |
| DRM_WARN("FRU Serial Number is larger than 16 characters. This is likely a mistake"); |
| size = 16; |
| } |
| memcpy(adev->serial, &buff[2], size); |
| adev->serial[size] = '\0'; |
| |
| return 0; |
| } |