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/*
* Intel MIC Platform Software Stack (MPSS)
*
* Copyright(c) 2013 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Intel MIC Host driver.
*
*/
#include <linux/fs.h>
#include <linux/pci.h>
#include "../common/mic_device.h"
#include "mic_device.h"
#include "mic_x100.h"
/**
* mic_x100_write_spad - write to the scratchpad register
* @mdev: pointer to mic_device instance
* @idx: index to the scratchpad register, 0 based
* @val: the data value to put into the register
*
* This function allows writing of a 32bit value to the indexed scratchpad
* register.
*
* RETURNS: none.
*/
static void
mic_x100_write_spad(struct mic_device *mdev, unsigned int idx, u32 val)
{
dev_dbg(mdev->sdev->parent, "Writing 0x%x to scratch pad index %d\n",
val, idx);
mic_mmio_write(&mdev->mmio, val,
MIC_X100_SBOX_BASE_ADDRESS +
MIC_X100_SBOX_SPAD0 + idx * 4);
}
/**
* mic_x100_read_spad - read from the scratchpad register
* @mdev: pointer to mic_device instance
* @idx: index to scratchpad register, 0 based
*
* This function allows reading of the 32bit scratchpad register.
*
* RETURNS: An appropriate -ERRNO error value on error, or zero for success.
*/
static u32
mic_x100_read_spad(struct mic_device *mdev, unsigned int idx)
{
u32 val = mic_mmio_read(&mdev->mmio,
MIC_X100_SBOX_BASE_ADDRESS +
MIC_X100_SBOX_SPAD0 + idx * 4);
dev_dbg(mdev->sdev->parent,
"Reading 0x%x from scratch pad index %d\n", val, idx);
return val;
}
struct mic_hw_ops mic_x100_ops = {
.aper_bar = MIC_X100_APER_BAR,
.mmio_bar = MIC_X100_MMIO_BAR,
.read_spad = mic_x100_read_spad,
.write_spad = mic_x100_write_spad,
};
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