1 // SPDX-License-Identifier: GPL-2.0-only
3 * aQuantia Corporation Network Driver
4 * Copyright (C) 2014-2017 aQuantia Corporation. All rights reserved
7 /* File aq_hw_utils.c: Definitions of helper functions used across
11 #include "aq_hw_utils.h"
15 void aq_hw_write_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk,
21 reg_old = aq_hw_read_reg(aq_hw, addr);
22 reg_new = (reg_old & (~msk)) | (val << shift);
24 if (reg_old != reg_new)
25 aq_hw_write_reg(aq_hw, addr, reg_new);
27 aq_hw_write_reg(aq_hw, addr, val);
31 u32 aq_hw_read_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk, u32 shift)
33 return ((aq_hw_read_reg(aq_hw, addr) & msk) >> shift);
36 u32 aq_hw_read_reg(struct aq_hw_s *hw, u32 reg)
38 u32 value = readl(hw->mmio + reg);
41 (~0U) == readl(hw->mmio +
42 hw->aq_nic_cfg->aq_hw_caps->hw_alive_check_addr))
43 aq_utils_obj_set(&hw->flags, AQ_HW_FLAG_ERR_UNPLUG);
48 void aq_hw_write_reg(struct aq_hw_s *hw, u32 reg, u32 value)
50 writel(value, hw->mmio + reg);
53 /* Most of 64-bit registers are in LSW, MSW form.
54 Counters are normally implemented by HW as latched pairs:
55 reading LSW first locks MSW, to overcome LSW overflow
57 u64 aq_hw_read_reg64(struct aq_hw_s *hw, u32 reg)
59 u64 value = aq_hw_read_reg(hw, reg);
61 value |= (u64)aq_hw_read_reg(hw, reg + 4) << 32;
65 int aq_hw_err_from_flags(struct aq_hw_s *hw)
69 if (aq_utils_obj_test(&hw->flags, AQ_HW_FLAG_ERR_UNPLUG)) {
73 if (aq_utils_obj_test(&hw->flags, AQ_HW_FLAG_ERR_HW)) {