/*
* Agere Systems Inc.
* 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
*
* Copyright © 2005 Agere Systems Inc.
* All rights reserved.
* http://www.agere.com
*
*------------------------------------------------------------------------------
*
* et1310_pm.c - All power management related code (not completely implemented)
*
*------------------------------------------------------------------------------
*
* SOFTWARE LICENSE
*
* This software is provided subject to the following terms and conditions,
* which you should read carefully before using the software. Using this
* software indicates your acceptance of these terms and conditions. If you do
* not agree with these terms and conditions, do not use the software.
*
* Copyright © 2005 Agere Systems Inc.
* All rights reserved.
*
* Redistribution and use in source or binary forms, with or without
* modifications, are permitted provided that the following conditions are met:
*
* . Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following Disclaimer as comments in the code as
* well as in the documentation and/or other materials provided with the
* distribution.
*
* . 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.
*
* . Neither the name of Agere Systems Inc. nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* Disclaimer
*
* THIS SOFTWARE IS PROVIDED “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
* USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
* RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, 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.
*
*/
#include "et131x_version.h"
#include "et131x_debug.h"
#include "et131x_defs.h"
#include <linux/init.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include "et1310_phy.h"
#include "et1310_pm.h"
#include "et1310_jagcore.h"
#include "et1310_mac.h"
#include "et1310_rx.h"
#include "et131x_adapter.h"
#include "et131x_initpci.h"
/* Data for debugging facilities */
#ifdef CONFIG_ET131X_DEBUG
extern dbg_info_t *et131x_dbginfo;
#endif /* CONFIG_ET131X_DEBUG */
/**
* EnablePhyComa - called when network cable is unplugged
* @pAdapter: pointer to our adapter structure
*
* driver receive an phy status change interrupt while in D0 and check that
* phy_status is down.
*
* -- gate off JAGCore;
* -- set gigE PHY in Coma mode
* -- wake on phy_interrupt; Perform software reset JAGCore,
* re-initialize jagcore and gigE PHY
*
* Add D0-ASPM-PhyLinkDown Support:
* -- while in D0, when there is a phy_interrupt indicating phy link
* down status, call the MPSetPhyComa routine to enter this active
* state power saving mode
* -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt
* indicating linkup status, call the MPDisablePhyComa routine to
* restore JAGCore and gigE PHY
*/
void EnablePhyComa(struct et131x_adapter *pAdapter)
{
unsigned long lockflags;
PM_CSR_t GlobalPmCSR;
int32_t LoopCounter = 10;
DBG_ENTER(et131x_dbginfo);
GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value);
/* Save the GbE PHY speed and duplex modes. Need to restore this
* when cable is plugged back in
*/
pAdapter->PoMgmt.PowerDownSpeed = pAdapter->AiForceSpeed;
pAdapter->PoMgmt.PowerDownDuplex = pAdapter->AiForceDpx;
/* Stop sending packets. */
spin_lock_irqsave(&pAdapter->SendHWLock, lockflags);
MP_SET_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER);
spin_unlock_irqrestore(&pAdapter->SendHWLock, lockflags);
/* Wait for outstanding Receive packets */
while ((MP_GET_RCV_REF(pAdapter) != 0) && (LoopCounter-- > 0)) {
mdelay(2);
}
/* Gate off JAGCore 3 clock domains */
GlobalPmCSR.bits.pm_sysclk_gate = 0;
GlobalPmCSR.bits.pm_txclk_gate = 0;
GlobalPmCSR.bits.pm_rxclk_gate = 0;
writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
/* Program gigE PHY in to Coma mode */
GlobalPmCSR.bits.pm_phy_sw_coma = 1;
writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
DBG_LEAVE(et131x_dbginfo);
}
/**
* DisablePhyComa - Disable the Phy Coma Mode
* @pAdapter: pointer to our adapter structure
*/
void DisablePhyComa(struct et131x_adapter *pAdapter)
{
PM_CSR_t GlobalPmCSR;
DBG_ENTER(et131x_dbginfo);
GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value);
/* Disable phy_sw_coma register and re-enable JAGCore clocks */
GlobalPmCSR.bits.pm_sysclk_gate = 1;
GlobalPmCSR.bits.pm_txclk_gate = 1;
GlobalPmCSR.bits.pm_rxclk_gate = 1;
GlobalPmCSR.bits.pm_phy_sw_coma = 0;
writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
/* Restore the GbE PHY speed and duplex modes;
* Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
*/
pAdapter->AiForceSpeed = pAdapter->PoMgmt.PowerDownSpeed;
pAdapter->AiForceDpx = pAdapter->PoMgmt.PowerDownDuplex;
/* Re-initialize the send structures */
et131x_init_send(pAdapter);
/* Reset the RFD list and re-start RU */
et131x_reset_recv(pAdapter);
/* Bring the device back to the state it was during init prior to
* autonegotiation being complete. This way, when we get the auto-neg
* complete interrupt, we can complete init by calling ConfigMacREGS2.
*/
et131x_soft_reset(pAdapter);
/* setup et1310 as per the documentation ?? */
et131x_adapter_setup(pAdapter);
/* Allow Tx to restart */
MP_CLEAR_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER);
/* Need to re-enable Rx. */
et131x_rx_dma_enable(pAdapter);
DBG_LEAVE(et131x_dbginfo);
}
