drivers/staging/rtl8192e/r8192_pm.c

   1 /*
   2    Power management interface routines.
   3    Written by Mariusz Matuszek.
   4    This code is currently just a placeholder for later work and
   5    does not do anything useful.
   6
   7    This is part of rtl8180 OpenSource driver.
   8    Copyright (C) Andrea Merello 2004  <andreamrl@tiscali.it>
   9    Released under the terms of GPL (General Public Licence)
  10 */
  11
  12 #include "r8192E.h"
  13 #include "r8192E_hw.h"
  14 #include "r8192_pm.h"
  15 #include "r8190_rtl8256.h"
  16
  17 int rtl8192E_save_state (struct pci_dev *dev, pm_message_t state)
  18 {
  19         printk(KERN_NOTICE "r8192E save state call (state %u).\n", state.event);
  20         return -EAGAIN;
  21 }
  22
  23
  24 int rtl8192E_suspend (struct pci_dev *pdev, pm_message_t state)
  25 {
  26         struct net_device *dev = pci_get_drvdata(pdev);
  27         struct r8192_priv *priv = ieee80211_priv(dev);
  28         u32     ulRegRead;
  29
  30         RT_TRACE(COMP_POWER, "============> r8192E suspend call.\n");
  31         if (!netif_running(dev))
  32                 goto out_pci_suspend;
  33
  34         if (dev->netdev_ops->ndo_stop)
  35                 dev->netdev_ops->ndo_stop(dev);
  36
  37         // Call MgntActSet_RF_State instead to prevent RF config race condition.
  38         if(!priv->ieee80211->bSupportRemoteWakeUp) {
  39                 MgntActSet_RF_State(priv, eRfOff, RF_CHANGE_BY_INIT);
  40                 // 2006.11.30. System reset bit
  41                 ulRegRead = read_nic_dword(priv, CPU_GEN);
  42                 ulRegRead|=CPU_GEN_SYSTEM_RESET;
  43                 write_nic_dword(priv, CPU_GEN, ulRegRead);
  44         } else {
  45                 //2008.06.03 for WOL
  46                 write_nic_dword(priv, WFCRC0, 0xffffffff);
  47                 write_nic_dword(priv, WFCRC1, 0xffffffff);
  48                 write_nic_dword(priv, WFCRC2, 0xffffffff);
  49                 //Write PMR register
  50                 write_nic_byte(priv, PMR, 0x5);
  51                 //Disable tx, enanble rx
  52                 write_nic_byte(priv, MacBlkCtrl, 0xa);
  53         }
  54
  55 out_pci_suspend:
  56         RT_TRACE(COMP_POWER, "r8192E support WOL call??????????????????????\n");
  57         if(priv->ieee80211->bSupportRemoteWakeUp) {
  58                 RT_TRACE(COMP_POWER, "r8192E support WOL call!!!!!!!!!!!!!!!!!!.\n");
  59         }
  60         netif_device_detach(dev);
  61         pci_save_state(pdev);
  62         pci_disable_device(pdev);
  63         pci_enable_wake(pdev, pci_choose_state(pdev,state),
  64                         priv->ieee80211->bSupportRemoteWakeUp?1:0);
  65         pci_set_power_state(pdev,pci_choose_state(pdev,state));
  66
  67         return 0;
  68 }
  69
  70 int rtl8192E_resume (struct pci_dev *pdev)
  71 {
  72         struct net_device *dev = pci_get_drvdata(pdev);
  73         int err;
  74         u32 val;
  75
  76         RT_TRACE(COMP_POWER, "================>r8192E resume call.\n");
  77
  78         pci_set_power_state(pdev, PCI_D0);
  79
  80         err = pci_enable_device(pdev);
  81         if(err) {
  82                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
  83                                 dev->name);
  84                 return err;
  85         }
  86
  87         pci_restore_state(pdev);
  88
  89         /*
  90          * Suspend/Resume resets the PCI configuration space, so we have to
  91          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
  92          * from interfering with C3 CPU state. pci_restore_state won't help
  93          * here since it only restores the first 64 bytes pci config header.
  94          */
  95         pci_read_config_dword(pdev, 0x40, &val);
  96         if ((val & 0x0000ff00) != 0) {
  97                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
  98         }
  99
 100
 101
 102         pci_enable_wake(pdev, PCI_D0, 0);
 103
 104         if(!netif_running(dev))
 105                 goto out;
 106
 107         netif_device_attach(dev);
 108
 109         if (dev->netdev_ops->ndo_open)
 110                 dev->netdev_ops->ndo_open(dev);
 111
 112 out:
 113         RT_TRACE(COMP_POWER, "<================r8192E resume call.\n");
 114         return 0;
 115 }
 116
 117
 118 int rtl8192E_enable_wake (struct pci_dev *dev, pm_message_t state, int enable)
 119 {
 120         printk(KERN_NOTICE "r8192E enable wake call (state %u, enable %d).\n",
 121                state.event, enable);
 122         return -EAGAIN;
 123 }