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 #ifdef RTL8190P
  29         u8      ucRegRead;
  30 #endif
  31         u32     ulRegRead;
  32
  33         RT_TRACE(COMP_POWER, "============> r8192E suspend call.\n");
  34         if (!netif_running(dev))
  35                 goto out_pci_suspend;
  36
  37         if (dev->netdev_ops->ndo_stop)
  38                 dev->netdev_ops->ndo_stop(dev);
  39
  40         // Call MgntActSet_RF_State instead to prevent RF config race condition.
  41         if(!priv->ieee80211->bSupportRemoteWakeUp) {
  42                 MgntActSet_RF_State(dev, eRfOff, RF_CHANGE_BY_INIT);
  43                 // 2006.11.30. System reset bit
  44                 ulRegRead = read_nic_dword(priv, CPU_GEN);
  45                 ulRegRead|=CPU_GEN_SYSTEM_RESET;
  46                 write_nic_dword(priv, CPU_GEN, ulRegRead);
  47         } else {
  48                 //2008.06.03 for WOL
  49                 write_nic_dword(priv, WFCRC0, 0xffffffff);
  50                 write_nic_dword(priv, WFCRC1, 0xffffffff);
  51                 write_nic_dword(priv, WFCRC2, 0xffffffff);
  52 #ifdef RTL8190P
  53                 //GPIO 0 = TRUE
  54                 ucRegRead = read_nic_byte(priv, GPO);
  55                 ucRegRead |= BIT0;
  56                 write_nic_byte(priv, GPO, ucRegRead);
  57 #endif
  58                 //Write PMR register
  59                 write_nic_byte(priv, PMR, 0x5);
  60                 //Disable tx, enanble rx
  61                 write_nic_byte(priv, MacBlkCtrl, 0xa);
  62         }
  63
  64 out_pci_suspend:
  65         RT_TRACE(COMP_POWER, "r8192E support WOL call??????????????????????\n");
  66         if(priv->ieee80211->bSupportRemoteWakeUp) {
  67                 RT_TRACE(COMP_POWER, "r8192E support WOL call!!!!!!!!!!!!!!!!!!.\n");
  68         }
  69         netif_device_detach(dev);
  70         pci_save_state(pdev);
  71         pci_disable_device(pdev);
  72         pci_enable_wake(pdev, pci_choose_state(pdev,state),
  73                         priv->ieee80211->bSupportRemoteWakeUp?1:0);
  74         pci_set_power_state(pdev,pci_choose_state(pdev,state));
  75
  76         return 0;
  77 }
  78
  79 int rtl8192E_resume (struct pci_dev *pdev)
  80 {
  81         struct net_device *dev = pci_get_drvdata(pdev);
  82         int err;
  83         u32 val;
  84
  85         RT_TRACE(COMP_POWER, "================>r8192E resume call.");
  86
  87         pci_set_power_state(pdev, PCI_D0);
  88
  89         err = pci_enable_device(pdev);
  90         if(err) {
  91                 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
  92                                 dev->name);
  93                 return err;
  94         }
  95
  96         pci_restore_state(pdev);
  97
  98         /*
  99          * Suspend/Resume resets the PCI configuration space, so we have to
 100          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
 101          * from interfering with C3 CPU state. pci_restore_state won't help
 102          * here since it only restores the first 64 bytes pci config header.
 103          */
 104         pci_read_config_dword(pdev, 0x40, &val);
 105         if ((val & 0x0000ff00) != 0) {
 106                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
 107         }
 108
 109
 110
 111         pci_enable_wake(pdev, PCI_D0, 0);
 112
 113         if(!netif_running(dev))
 114                 goto out;
 115
 116         netif_device_attach(dev);
 117
 118         if (dev->netdev_ops->ndo_open)
 119                 dev->netdev_ops->ndo_open(dev);
 120
 121 out:
 122         RT_TRACE(COMP_POWER, "<================r8192E resume call.\n");
 123         return 0;
 124 }
 125
 126
 127 int rtl8192E_enable_wake (struct pci_dev *dev, pm_message_t state, int enable)
 128 {
 129         printk(KERN_NOTICE "r8192E enable wake call (state %u, enable %d).\n",
 130                state.event, enable);
 131         return -EAGAIN;
 132 }