/*
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* Generic Broadcom Home Networking Division (HND) PIO engine HW interface
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* This supports the following chips: BCM42xx, 44xx, 47xx .
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*
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* Copyright (C) 2020, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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*
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* <<Broadcom-WL-IPTag/Dual:>>
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*/
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#ifndef _sbhndpio_h_
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#define _sbhndpio_h_
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/* PIO structure,
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* support two PIO format: 2 bytes access and 4 bytes access
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* basic FIFO register set is per channel(transmit or receive)
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* a pair of channels is defined for convenience
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*/
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/* 2byte-wide pio register set per channel(xmt or rcv) */
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typedef volatile struct {
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uint16 fifocontrol;
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uint16 fifodata;
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uint16 fifofree; /* only valid in xmt channel, not in rcv channel */
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uint16 PAD;
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} pio2regs_t;
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/* a pair of pio channels(tx and rx) */
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typedef volatile struct {
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pio2regs_t tx;
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pio2regs_t rx;
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} pio2regp_t;
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/* 4byte-wide pio register set per channel(xmt or rcv) */
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typedef volatile struct {
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uint32 fifocontrol;
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uint32 fifodata;
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} pio4regs_t;
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/* a pair of pio channels(tx and rx) */
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typedef volatile struct {
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pio4regs_t tx;
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pio4regs_t rx;
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} pio4regp_t;
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#endif /* _sbhndpio_h_ */
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