72 lines
2.7 KiB
C
72 lines
2.7 KiB
C
/*
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* e1_hw.h
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*
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* Copyright (C) 2019-2020 Sylvain Munaut <tnt@246tNt.com>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#pragma once
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#include <stdint.h>
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//TODO: Should latre go into the no2e1 git repo
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struct e1_chan {
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uint32_t csr;
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uint32_t bd;
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} __attribute__((packed,aligned(4)));
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struct e1_core {
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struct e1_chan rx;
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struct e1_chan tx;
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} __attribute__((packed,aligned(4)));
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/* E1 receiver control register */
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#define E1_RX_CR_ENABLE (1 << 0) /* Enable receiver */
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#define E1_RX_CR_MODE_TRSP (0 << 1) /* Request no alignment at all */
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#define E1_RX_CR_MODE_BYTE (1 << 1) /* Request byte-level alignment */
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#define E1_RX_CR_MODE_BFA (2 << 1) /* Request Basic Frame Alignment */
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#define E1_RX_CR_MODE_MFA (3 << 1) /* Request Multi-Frame Alignment */
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#define E1_RX_CR_MODE_MASK (3 << 1)
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#define E1_RX_CR_OVFL_CLR (1 << 12) /* Clear Rx overflow condition */
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/* E1 receiver status register */
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#define E1_RX_SR_ENABLED (1 << 0) /* Indicate Rx is enabled */
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#define E1_RX_SR_ALIGNED (1 << 1) /* Indicate Alignment achieved */
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#define E1_RX_SR_BD_IN_EMPTY (1 << 8)
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#define E1_RX_SR_BD_IN_FULL (1 << 9)
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#define E1_RX_SR_BD_OUT_EMPTY (1 << 10)
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#define E1_RX_SR_BD_OUT_FULL (1 << 11)
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#define E1_RX_SR_OVFL (1 << 12) /* Indicate Rx overflow */
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/* E1 transmitter control register */
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#define E1_TX_CR_ENABLE (1 << 0) /* Enable transmitter */
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#define E1_TX_CR_MODE_TRSP (0 << 1) /* Transparent bit-stream mode */
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#define E1_TX_CR_MODE_TS0 (1 << 1) /* Generate TS0 in framer */
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#define E1_TX_CR_MODE_TS0_CRC (2 << 1) /* Generate TS0 + CRC4 in framer */
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#define E1_TX_CR_MODE_TS0_CRC_E (3 << 1) /* Generate TS0 + CRC4 + E-bits (based on Rx) in framer */
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#define E1_TX_CR_MODE_MASK (3 << 1)
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#define E1_TX_CR_TICK_LOCAL (0 << 3) /* use local clock for Tx */
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#define E1_TX_CR_TICK_REMOTE (1 << 3) /* use recovered remote clock for Tx */
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#define E1_TX_CR_TICK_MASK (1 << 3)
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#define E1_TX_CR_ALARM (1 << 4) /* indicate ALARM to remote */
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#define E1_TX_CR_LOOPBACK (1 << 5) /* external loopback enable/diasble */
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#define E1_TX_CR_LOOPBACK_CROSS (1 << 6) /* source of loopback: local (0) or other (1) port */
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#define E1_TX_CR_UNFL_CLR (1 << 12) /* Clear Tx underflow condition */
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/* E1 transmitter status register */
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#define E1_TX_SR_ENABLED (1 << 0) /* Indicate Tx is enabled */
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#define E1_TX_SR_BD_IN_EMPTY (1 << 8)
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#define E1_TX_SR_BD_IN_FULL (1 << 9)
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#define E1_TX_SR_BD_OUT_EMPTY (1 << 10)
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#define E1_TX_SR_BD_OUT_FULL (1 << 11)
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#define E1_TX_SR_UNFL (1 << 12) /* Indicate Tx underflow */
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/* E1 buffer descriptor flags */
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#define E1_BD_VALID (1 << 15)
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#define E1_BD_CRC1 (1 << 14)
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#define E1_BD_CRC0 (1 << 13)
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#define E1_BD_ADDR(x) ((x) & 0x7f)
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#define E1_BD_ADDR_MSK 0x7f
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#define E1_BD_ADDR_SHFT 0
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