forked from Minki/linux
f48ad614c1
The TODO list for the hfi1 driver was completed during 4.6. In addition other objections raised (which are far beyond what was in the TODO list) have been addressed as well. It is now time to remove the driver from staging and into the drivers/infiniband sub-tree. Reviewed-by: Jubin John <jubin.john@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/*
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* Copyright(c) 2015, 2016 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* 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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/delay.h>
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#include "hfi.h"
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#include "common.h"
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#include "eprom.h"
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#define CMD_SHIFT 24
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#define CMD_RELEASE_POWERDOWN_NOID ((0xab << CMD_SHIFT))
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/* controller interface speeds */
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#define EP_SPEED_FULL 0x2 /* full speed */
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/*
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* How long to wait for the EPROM to become available, in ms.
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* The spec 32 Mb EPROM takes around 40s to erase then write.
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* Double it for safety.
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*/
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#define EPROM_TIMEOUT 80000 /* ms */
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/*
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* Initialize the EPROM handler.
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*/
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int eprom_init(struct hfi1_devdata *dd)
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{
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int ret = 0;
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/* only the discrete chip has an EPROM */
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if (dd->pcidev->device != PCI_DEVICE_ID_INTEL0)
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return 0;
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/*
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* It is OK if both HFIs reset the EPROM as long as they don't
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* do it at the same time.
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*/
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ret = acquire_chip_resource(dd, CR_EPROM, EPROM_TIMEOUT);
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if (ret) {
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dd_dev_err(dd,
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"%s: unable to acquire EPROM resource, no EPROM support\n",
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__func__);
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goto done_asic;
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}
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/* reset EPROM to be sure it is in a good state */
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/* set reset */
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write_csr(dd, ASIC_EEP_CTL_STAT, ASIC_EEP_CTL_STAT_EP_RESET_SMASK);
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/* clear reset, set speed */
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write_csr(dd, ASIC_EEP_CTL_STAT,
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EP_SPEED_FULL << ASIC_EEP_CTL_STAT_RATE_SPI_SHIFT);
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/* wake the device with command "release powerdown NoID" */
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write_csr(dd, ASIC_EEP_ADDR_CMD, CMD_RELEASE_POWERDOWN_NOID);
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dd->eprom_available = true;
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release_chip_resource(dd, CR_EPROM);
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done_asic:
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return ret;
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}
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