f6b842edd3
BCMSAI 4.3.0.10, 6.5.21 SDK release with enhancements and fixes for vxlan, TD3 MMU, TD4-X9 EA support, etc.
98 lines
2.3 KiB
C
98 lines
2.3 KiB
C
/*! \file ngbde_pio.c
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*
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* API for managing and accessing memory-mapped I/O for switch
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* registers.
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*
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*/
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/*
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* $Copyright: Copyright 2018-2020 Broadcom. All rights reserved.
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* The term 'Broadcom' refers to Broadcom Inc. and/or its subsidiaries.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* A copy of the GNU General Public License version 2 (GPLv2) can
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* be found in the LICENSES folder.$
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*/
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#include <ngbde.h>
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void *
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ngbde_pio_map(void *devh, phys_addr_t addr, phys_addr_t size)
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{
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struct ngbde_dev_s *sd = (struct ngbde_dev_s *)devh;
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if (sd->pio_mem) {
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if (addr == sd->pio_win.addr && size == sd->pio_win.size) {
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/* Already mapped */
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return sd->pio_mem;
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}
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ngbde_pio_unmap(devh);
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}
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sd->pio_mem = ioremap_nocache(addr, size);
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if (sd->pio_mem) {
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/* Save mapped resources */
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sd->pio_win.addr = addr;
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sd->pio_win.size = size;
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} else {
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printk(KERN_WARNING "%s: Unable to map address 0x%08lu\n",
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MOD_NAME, (unsigned long)addr);
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}
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return sd->pio_mem;
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}
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void
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ngbde_pio_unmap(void *devh)
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{
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struct ngbde_dev_s *sd = (struct ngbde_dev_s *)devh;
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if (sd->pio_mem) {
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iounmap(sd->pio_mem);
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sd->pio_mem = NULL;
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}
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}
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void
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ngbde_pio_cleanup(void)
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{
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struct ngbde_dev_s *swdev, *sd;
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unsigned int num_swdev, idx;
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ngbde_swdev_get_all(&swdev, &num_swdev);
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for (idx = 0; idx < num_swdev; idx++) {
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sd = ngbde_swdev_get(idx);
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ngbde_pio_unmap(sd);
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}
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}
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void
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ngbde_pio_write32(void *devh, uint32_t offs, uint32_t val)
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{
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struct ngbde_dev_s *sd = (struct ngbde_dev_s *)devh;
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if (sd->pio_mem) {
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NGBDE_IOWRITE32(val, sd->pio_mem + offs);
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}
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}
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uint32_t
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ngbde_pio_read32(void *devh, uint32_t offs)
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{
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struct ngbde_dev_s *sd = (struct ngbde_dev_s *)devh;
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if (sd->pio_mem) {
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return NGBDE_IOREAD32(sd->pio_mem + offs);
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}
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return 0;
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}
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