src/et131x/et1310_pm.c

   1 /*
   2  * Agere Systems Inc.
   3  * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs
   4  *
   5  * Copyright © 2005 Agere Systems Inc.
   6  * All rights reserved.
   7  *   http://www.agere.com
   8  *
   9  *------------------------------------------------------------------------------
  10  *
  11  * et1310_pm.c - All power management related code (not completely implemented)
  12  *
  13  *------------------------------------------------------------------------------
  14  *
  15  * SOFTWARE LICENSE
  16  *
  17  * This software is provided subject to the following terms and conditions,
  18  * which you should read carefully before using the software.  Using this
  19  * software indicates your acceptance of these terms and conditions.  If you do
  20  * not agree with these terms and conditions, do not use the software.
  21  *
  22  * Copyright © 2005 Agere Systems Inc.
  23  * All rights reserved.
  24  *
  25  * Redistribution and use in source or binary forms, with or without
  26  * modifications, are permitted provided that the following conditions are met:
  27  *
  28  * . Redistributions of source code must retain the above copyright notice, this
  29  *    list of conditions and the following Disclaimer as comments in the code as
  30  *    well as in the documentation and/or other materials provided with the
  31  *    distribution.
  32  *
  33  * . Redistributions in binary form must reproduce the above copyright notice,
  34  *    this list of conditions and the following Disclaimer in the documentation
  35  *    and/or other materials provided with the distribution.
  36  *
  37  * . Neither the name of Agere Systems Inc. nor the names of the contributors
  38  *    may be used to endorse or promote products derived from this software
  39  *    without specific prior written permission.
  40  *
  41  * Disclaimer
  42  *
  43  * THIS SOFTWARE IS PROVIDED \93AS IS\94 AND ANY EXPRESS OR IMPLIED WARRANTIES,
  44  * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
  45  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  ANY
  46  * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
  47  * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
  48  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  49  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  50  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  51  * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  53  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  54  * DAMAGE.
  55  *
  56  */
  57
  58 #include "et131x_version.h"
  59 #include "et131x_debug.h"
  60 #include "et131x_defs.h"
  61
  62 #include <linux/init.h>
  63 #include <linux/module.h>
  64 #include <linux/types.h>
  65 #include <linux/kernel.h>
  66
  67 #include <linux/sched.h>
  68 #include <linux/ptrace.h>
  69 #include <linux/slab.h>
  70 #include <linux/ctype.h>
  71 #include <linux/string.h>
  72 #include <linux/timer.h>
  73 #include <linux/interrupt.h>
  74 #include <linux/in.h>
  75 #include <linux/delay.h>
  76 #include <asm/io.h>
  77 #include <asm/system.h>
  78 #include <asm/bitops.h>
  79
  80 #include <linux/netdevice.h>
  81 #include <linux/etherdevice.h>
  82 #include <linux/skbuff.h>
  83 #include <linux/if_arp.h>
  84 #include <linux/ioport.h>
  85
  86 #include "et1310_phy.h"
  87 #include "et1310_pm.h"
  88 #include "et1310_jagcore.h"
  89 #include "et1310_mac.h"
  90 #include "et1310_rx.h"
  91
  92 #include "et131x_adapter.h"
  93 #include "et131x_initpci.h"
  94
  95 /* Data for debugging facilities */
  96 #ifdef CONFIG_ET131X_DEBUG
  97 extern dbg_info_t *et131x_dbginfo;
  98 #endif /* CONFIG_ET131X_DEBUG */
  99
 100 /**
 101  * EnablePhyComa - called when network cable is unplugged
 102  * @pAdapter: pointer to our adapter structure
 103  *
 104  * driver receive an phy status change interrupt while in D0 and check that
 105  * phy_status is down.
 106  *
 107  *          -- gate off JAGCore;
 108  *          -- set gigE PHY in Coma mode
 109  *          -- wake on phy_interrupt; Perform software reset JAGCore,
 110  *             re-initialize jagcore and gigE PHY
 111  *
 112  *      Add D0-ASPM-PhyLinkDown Support:
 113  *          -- while in D0, when there is a phy_interrupt indicating phy link
 114  *             down status, call the MPSetPhyComa routine to enter this active
 115  *             state power saving mode
 116  *          -- while in D0-ASPM-PhyLinkDown mode, when there is a phy_interrupt
 117  *       indicating linkup status, call the MPDisablePhyComa routine to
 118  *             restore JAGCore and gigE PHY
 119  */
 120 void EnablePhyComa(struct et131x_adapter *pAdapter)
 121 {
 122         unsigned long lockflags;
 123         PM_CSR_t GlobalPmCSR;
 124         int32_t LoopCounter = 10;
 125
 126         DBG_ENTER(et131x_dbginfo);
 127
 128         GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value);
 129
 130         /* Save the GbE PHY speed and duplex modes. Need to restore this
 131          * when cable is plugged back in
 132          */
 133         pAdapter->PoMgmt.PowerDownSpeed = pAdapter->AiForceSpeed;
 134         pAdapter->PoMgmt.PowerDownDuplex = pAdapter->AiForceDpx;
 135
 136         /* Stop sending packets. */
 137         spin_lock_irqsave(&pAdapter->SendHWLock, lockflags);
 138         MP_SET_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER);
 139         spin_unlock_irqrestore(&pAdapter->SendHWLock, lockflags);
 140
 141         /* Wait for outstanding Receive packets */
 142         while ((MP_GET_RCV_REF(pAdapter) != 0) && (LoopCounter-- > 0)) {
 143                 mdelay(2);
 144         }
 145
 146         /* Gate off JAGCore 3 clock domains */
 147         GlobalPmCSR.bits.pm_sysclk_gate = 0;
 148         GlobalPmCSR.bits.pm_txclk_gate = 0;
 149         GlobalPmCSR.bits.pm_rxclk_gate = 0;
 150         writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
 151
 152         /* Program gigE PHY in to Coma mode */
 153         GlobalPmCSR.bits.pm_phy_sw_coma = 1;
 154         writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
 155
 156         DBG_LEAVE(et131x_dbginfo);
 157 }
 158
 159 /**
 160  * DisablePhyComa - Disable the Phy Coma Mode
 161  * @pAdapter: pointer to our adapter structure
 162  */
 163 void DisablePhyComa(struct et131x_adapter *pAdapter)
 164 {
 165         PM_CSR_t GlobalPmCSR;
 166
 167         DBG_ENTER(et131x_dbginfo);
 168
 169         GlobalPmCSR.value = readl(&pAdapter->CSRAddress->global.pm_csr.value);
 170
 171         /* Disable phy_sw_coma register and re-enable JAGCore clocks */
 172         GlobalPmCSR.bits.pm_sysclk_gate = 1;
 173         GlobalPmCSR.bits.pm_txclk_gate = 1;
 174         GlobalPmCSR.bits.pm_rxclk_gate = 1;
 175         GlobalPmCSR.bits.pm_phy_sw_coma = 0;
 176         writel(GlobalPmCSR.value, &pAdapter->CSRAddress->global.pm_csr.value);
 177
 178         /* Restore the GbE PHY speed and duplex modes;
 179          * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
 180          */
 181         pAdapter->AiForceSpeed = pAdapter->PoMgmt.PowerDownSpeed;
 182         pAdapter->AiForceDpx = pAdapter->PoMgmt.PowerDownDuplex;
 183
 184         /* Re-initialize the send structures */
 185         et131x_init_send(pAdapter);
 186
 187         /* Reset the RFD list and re-start RU  */
 188         et131x_reset_recv(pAdapter);
 189
 190         /* Bring the device back to the state it was during init prior to
 191          * autonegotiation being complete.  This way, when we get the auto-neg
 192          * complete interrupt, we can complete init by calling ConfigMacREGS2.
 193          */
 194         et131x_soft_reset(pAdapter);
 195
 196         /* setup et1310 as per the documentation ?? */
 197         et131x_adapter_setup(pAdapter);
 198
 199         /* Allow Tx to restart */
 200         MP_CLEAR_FLAG(pAdapter, fMP_ADAPTER_LOWER_POWER);
 201
 202         /* Need to re-enable Rx. */
 203         et131x_rx_dma_enable(pAdapter);
 204
 205         DBG_LEAVE(et131x_dbginfo);
 206 }
 207