/******************************************************************************

  Copyright (c) 2001-2017, Intel Corporation
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

   3. Neither the name of the Intel Corporation nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.

******************************************************************************/
/*$FreeBSD$*/

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/taskqueue.h>

#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#include <net/ifq_var.h>

#include <dev/netif/ix/ixgbe_api.h>
#include <dev/netif/ix/if_ix.h>

u16
ixgbe_read_pci_cfg_pf(struct ixgbe_hw *hw, u32 reg)
{
	return pci_read_config(((struct ix_softc *)hw->back)->dev, reg, 2);
}

void
ixgbe_write_pci_cfg_pf(struct ixgbe_hw *hw, u32 reg, u16 value)
{
	pci_write_config(((struct ix_softc *)hw->back)->dev, reg, value, 2);
}

u32
ixgbe_read_reg_pf(struct ixgbe_hw *hw, u32 reg)
{
	struct ix_softc *sc = (struct ix_softc *)hw->back;
	u32 retval;
	u8 i;

	retval = bus_space_read_4(sc->osdep.mem_bus_space_tag,
	    sc->osdep.mem_bus_space_handle, reg);

	/* Normal... */
	if ((retval != 0xDEADBEEF) ||
	    !(hw->phy.nw_mng_if_sel & IXGBE_NW_MNG_IF_SEL_SGMII_ENABLE))
		return retval;

	/* Unusual... */

	/*
	 * 10/100 Mb mode has a quirk where it's possible the previous
	 * write to the Phy hasn't completed.  So we keep trying.
	 */
	for (i = 100; retval; i--) {
		if (!i) {
			device_printf(sc->dev, "Register (0x%08X) writes did not complete: 0x%08X\n",
			    reg, retval);
			break;
		}
		retval = bus_space_read_4(sc->osdep.mem_bus_space_tag,
		    sc->osdep.mem_bus_space_handle, IXGBE_MAC_SGMII_BUSY);
	}

	for (i = 10; retval == 0xDEADBEEF; i--) {
		if (!i) {
			device_printf(sc->dev,
			    "Failed to read register 0x%08X.\n", reg);
			break;
		}
		retval = bus_space_read_4(sc->osdep.mem_bus_space_tag,
		    sc->osdep.mem_bus_space_handle, reg);
	}

	return retval;
}

void
ixgbe_write_reg_pf(struct ixgbe_hw *hw, u32 reg, u32 val)
{
	bus_space_write_4(((struct ix_softc *)hw->back)->osdep.mem_bus_space_tag,
	    ((struct ix_softc *)hw->back)->osdep.mem_bus_space_handle,
	    reg, val);
}

u32
ixgbe_read_reg_array_pf(struct ixgbe_hw *hw, u32 reg, u32 offset)
{
	return bus_space_read_4(((struct ix_softc *)hw->back)->osdep.mem_bus_space_tag,
	    ((struct ix_softc *)hw->back)->osdep.mem_bus_space_handle,
	    reg + (offset << 2));
}

void
ixgbe_write_reg_array_pf(struct ixgbe_hw *hw, u32 reg, u32 offset, u32 val)
{
	bus_space_write_4(((struct ix_softc *)hw->back)->osdep.mem_bus_space_tag,
	    ((struct ix_softc *)hw->back)->osdep.mem_bus_space_handle,
	    reg + (offset << 2), val);
}