cab05c5302
Add implementation for hardware registers access routines. Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com> Signed-off-by: Pavel Belous <pavel.belous@aquantia.com>
53 lines
1.1 KiB
C
53 lines
1.1 KiB
C
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0)
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/* Copyright (C) 2014-2017 aQuantia Corporation. */
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/* File aq_hw_utils.c: Definitions of helper functions used across
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* hardware layer.
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*/
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#include "atl_hw_regs.h"
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#include <rte_io.h>
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#include <rte_byteorder.h>
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void aq_hw_write_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk,
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u32 shift, u32 val)
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{
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if (msk ^ ~0) {
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u32 reg_old, reg_new;
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reg_old = aq_hw_read_reg(aq_hw, addr);
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reg_new = (reg_old & (~msk)) | (val << shift);
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if (reg_old != reg_new)
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aq_hw_write_reg(aq_hw, addr, reg_new);
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} else {
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aq_hw_write_reg(aq_hw, addr, val);
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}
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}
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u32 aq_hw_read_reg_bit(struct aq_hw_s *aq_hw, u32 addr, u32 msk, u32 shift)
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{
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return ((aq_hw_read_reg(aq_hw, addr) & msk) >> shift);
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}
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u32 aq_hw_read_reg(struct aq_hw_s *hw, u32 reg)
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{
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return rte_le_to_cpu_32(rte_read32((u8 *)hw->mmio + reg));
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}
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void aq_hw_write_reg(struct aq_hw_s *hw, u32 reg, u32 value)
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{
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rte_write32((rte_cpu_to_le_32(value)), (u8 *)hw->mmio + reg);
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}
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int aq_hw_err_from_flags(struct aq_hw_s *hw)
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{
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int err = 0;
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if (aq_hw_read_reg(hw, 0x10U) == ~0U)
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return -ENXIO;
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return err;
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}
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