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authorLinus Torvalds <torvalds@linux-foundation.org>2021-08-29 15:04:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-08-29 15:04:50 -0700
commit7d2a07b769330c34b4deabeed939325c77a7ec2f (patch)
treef4c184d72805b56a24a5726307cff2d3c7224b43 /include/net/pie.h
parent90ac80dcd3136da7c5694835d6cad2010aa08798 (diff)
Linux 5.14v5.14
Diffstat (limited to 'include/net/pie.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit
ster. **/ s32 e1000e_read_nvm_eerd(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) { struct e1000_nvm_info *nvm = &hw->nvm; u32 i, eerd = 0; s32 ret_val = 0; /* A check for invalid values: offset too large, too many words, * too many words for the offset, and not enough words. */ if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) || (words == 0)) { e_dbg("nvm parameter(s) out of bounds\n"); return -E1000_ERR_NVM; } for (i = 0; i < words; i++) { eerd = ((offset + i) << E1000_NVM_RW_ADDR_SHIFT) + E1000_NVM_RW_REG_START; ew32(EERD, eerd); ret_val = e1000e_poll_eerd_eewr_done(hw, E1000_NVM_POLL_READ); if (ret_val) { e_dbg("NVM read error: %d\n", ret_val); break; } data[i] = (er32(EERD) >> E1000_NVM_RW_REG_DATA); } return ret_val; } /** * e1000e_write_nvm_spi - Write to EEPROM using SPI * @hw: pointer to the HW structure * @offset: offset within the EEPROM to be written to * @words: number of words to write * @data: 16 bit word(s) to be written to the EEPROM * * Writes data to EEPROM at offset using SPI interface. * * If e1000e_update_nvm_checksum is not called after this function , the * EEPROM will most likely contain an invalid checksum. **/ s32 e1000e_write_nvm_spi(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) { struct e1000_nvm_info *nvm = &hw->nvm; s32 ret_val = -E1000_ERR_NVM; u16 widx = 0; /* A check for invalid values: offset too large, too many words, * and not enough words. */ if ((offset >= nvm->word_size) || (words > (nvm->word_size - offset)) || (words == 0)) { e_dbg("nvm parameter(s) out of bounds\n"); return -E1000_ERR_NVM; } while (widx < words) { u8 write_opcode = NVM_WRITE_OPCODE_SPI; ret_val = nvm->ops.acquire(hw); if (ret_val) return ret_val; ret_val = e1000_ready_nvm_eeprom(hw); if (ret_val) { nvm->ops.release(hw); return ret_val; } e1000_standby_nvm(hw); /* Send the WRITE ENABLE command (8 bit opcode) */ e1000_shift_out_eec_bits(hw, NVM_WREN_OPCODE_SPI, nvm->opcode_bits); e1000_standby_nvm(hw); /* Some SPI eeproms use the 8th address bit embedded in the * opcode */ if ((nvm->address_bits == 8) && (offset >= 128)) write_opcode |= NVM_A8_OPCODE_SPI; /* Send the Write command (8-bit opcode + addr) */ e1000_shift_out_eec_bits(hw, write_opcode, nvm->opcode_bits); e1000_shift_out_eec_bits(hw, (u16)((offset + widx) * 2), nvm->address_bits); /* Loop to allow for up to whole page write of eeprom */ while (widx < words) { u16 word_out = data[widx]; word_out = (word_out >> 8) | (word_out << 8); e1000_shift_out_eec_bits(hw, word_out, 16); widx++; if ((((offset + widx) * 2) % nvm->page_size) == 0) { e1000_standby_nvm(hw); break; } } usleep_range(10000, 11000); nvm->ops.release(hw); } return ret_val; } /** * e1000_read_pba_string_generic - Read device part number * @hw: pointer to the HW structure * @pba_num: pointer to device part number * @pba_num_size: size of part number buffer * * Reads the product board assembly (PBA) number from the EEPROM and stores * the value in pba_num. **/ s32 e1000_read_pba_string_generic(struct e1000_hw *hw, u8 *pba_num, u32 pba_num_size) { s32 ret_val; u16 nvm_data; u16 pba_ptr; u16 offset; u16 length; if (pba_num == NULL) { e_dbg("PBA string buffer was null\n"); return -E1000_ERR_INVALID_ARGUMENT; } ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_0, 1, &nvm_data); if (ret_val) { e_dbg("NVM Read Error\n"); return ret_val; } ret_val = e1000_read_nvm(hw, NVM_PBA_OFFSET_1, 1, &pba_ptr); if (ret_val) { e_dbg("NVM Read Error\n"); return ret_val; } /* if nvm_data is not ptr guard the PBA must be in legacy format which * means pba_ptr is actually our second data word for the PBA number * and we can decode it into an ascii string */ if (nvm_data != NVM_PBA_PTR_GUARD) { e_dbg("NVM PBA number is not stored as string\n"); /* make sure callers buffer is big enough to store the PBA */ if (pba_num_size < E1000_PBANUM_LENGTH) { e_dbg("PBA string buffer too small\n"); return E1000_ERR_NO_SPACE; } /* extract hex string from data and pba_ptr */ pba_num[0] = (nvm_data >> 12) & 0xF; pba_num[1] = (nvm_data >> 8) & 0xF; pba_num[2] = (nvm_data >> 4) & 0xF; pba_num[3] = nvm_data & 0xF; pba_num[4] = (pba_ptr >> 12) & 0xF; pba_num[5] = (pba_ptr >> 8) & 0xF; pba_num[6] = '-'; pba_num[7] = 0; pba_num[8] = (pba_ptr >> 4) & 0xF; pba_num[9] = pba_ptr & 0xF; /* put a null character on the end of our string */ pba_num[10] = '\0'; /* switch all the data but the '-' to hex char */ for (offset = 0; offset < 10; offset++) { if (pba_num[offset] < 0xA) pba_num[offset] += '0'; else if (pba_num[offset] < 0x10) pba_num[offset] += 'A' - 0xA; } return 0; } ret_val = e1000_read_nvm(hw, pba_ptr, 1, &length); if (ret_val) { e_dbg("NVM Read Error\n"); return ret_val; } if (length == 0xFFFF || length == 0) { e_dbg("NVM PBA number section invalid length\n"); return -E1000_ERR_NVM_PBA_SECTION; } /* check if pba_num buffer is big enough */ if (pba_num_size < (((u32)length * 2) - 1)) { e_dbg("PBA string buffer too small\n"); return -E1000_ERR_NO