path: root/drivers/net/ixgb/ixgb_hw.c

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

  Intel PRO/10GbE Linux driver
  Copyright(c) 1999 - 2006 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

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

/* ixgb_hw.c
 * Shared functions for accessing and configuring the adapter
 */

#include "ixgb_hw.h"
#include "ixgb_ids.h"

/*  Local function prototypes */

static uint32_t ixgb_hash_mc_addr(struct ixgb_hw *hw, uint8_t * mc_addr);

static void ixgb_mta_set(struct ixgb_hw *hw, uint32_t hash_value);

static void ixgb_get_bus_info(struct ixgb_hw *hw);

static boolean_t ixgb_link_reset(struct ixgb_hw *hw);

static void ixgb_optics_reset(struct ixgb_hw *hw);

static ixgb_phy_type ixgb_identify_phy(struct ixgb_hw *hw);

static void ixgb_clear_hw_cntrs(struct ixgb_hw *hw);

static void ixgb_clear_vfta(struct ixgb_hw *hw);

static void ixgb_init_rx_addrs(struct ixgb_hw *hw);

static uint16_t ixgb_read_phy_reg(struct ixgb_hw *hw,
				  uint32_t reg_address,
				  uint32_t phy_address,
				  uint32_t device_type);

static boolean_t ixgb_setup_fc(struct ixgb_hw *hw);

static boolean_t mac_addr_valid(uint8_t *mac_addr);

static uint32_t ixgb_mac_reset(struct ixgb_hw *hw)
{
	uint32_t ctrl_reg;

	ctrl_reg =  IXGB_CTRL0_RST |
				IXGB_CTRL0_SDP3_DIR |   /* All pins are Output=1 */
				IXGB_CTRL0_SDP2_DIR |
				IXGB_CTRL0_SDP1_DIR |
				IXGB_CTRL0_SDP0_DIR |
				IXGB_CTRL0_SDP3	 |   /* Initial value 1101   */
				IXGB_CTRL0_SDP2	 |
				IXGB_CTRL0_SDP0;

#ifdef HP_ZX1
	/* Workaround for 82597EX reset errata */
	IXGB_WRITE_REG_IO(hw, CTRL0, ctrl_reg);
#else
	IXGB_WRITE_REG(hw, CTRL0, ctrl_reg);
#endif

	/* Delay a few ms just to allow the reset to complete */
	msleep(IXGB_DELAY_AFTER_RESET);
	ctrl_reg = IXGB_READ_REG(hw, CTRL0);
#ifdef DBG
	/* Make sure the self-clearing global reset bit did self clear */
	ASSERT(!(ctrl_reg & IXGB_CTRL0_RST));
#endif

	if (hw->phy_type == ixgb_phy_type_txn17401) {
		ixgb_optics_reset(hw);
	}

	return ctrl_reg;
}

/******************************************************************************
 * Reset the transmit and receive units; mask and clear all interrupts.
 *
 * hw - Struct containing variables accessed by shared code
 *****************************************************************************/
boolean_t
ixgb_adapter_stop(struct ixgb_hw *hw)
{
	uint32_t ctrl_reg;
	uint32_t icr_reg;

	DEBUGFUNC("ixgb_adapter_stop");

	/* If we are stopped or resetting exit gracefully and wait to be
	 * started again before accessing the hardware.
	 */
	if(hw->adapter_stopped) {
		DEBUGOUT("Exiting because the adapter is already stopped!!!\n");
		return FALSE;
	}

	/* Set the Adapter Stopped flag so other driver functions stop
	 * touching the Hardware.
	 */
	hw->adapter_stopped = TRUE;

	/* Clear interrupt mask to stop board from generating interrupts */
	DEBUGOUT("Masking off all interrupts\n");
	IXGB_WRITE_REG(hw, IMC, 0xFFFFFFFF);

	/* Disable the Transmit and Receive units.  Then delay to allow
	 * any pending transactions to complete before we hit the MAC with
	 * the global reset.
	 */