diff options
Diffstat (limited to 'drivers/ieee1394/ohci1394.c')
| -rw-r--r-- | drivers/ieee1394/ohci1394.c | 126 |
1 files changed, 48 insertions, 78 deletions
diff --git a/drivers/ieee1394/ohci1394.c b/drivers/ieee1394/ohci1394.c index b98b9934b92..a12802553b4 100644 --- a/drivers/ieee1394/ohci1394.c +++ b/drivers/ieee1394/ohci1394.c @@ -3529,108 +3529,40 @@ static void ohci1394_pci_remove(struct pci_dev *pdev) } #ifdef CONFIG_PM -static int ohci1394_pci_resume (struct pci_dev *pdev) +static int ohci1394_pci_suspend(struct pci_dev *pdev, pm_message_t state) { int err; - struct ti_ohci *ohci; - -/* PowerMac resume code comes first */ -#ifdef CONFIG_PPC_PMAC - if (machine_is(powermac)) { - struct device_node *of_node; - - /* Re-enable 1394 */ - of_node = pci_device_to_OF_node (pdev); - if (of_node) - pmac_call_feature (PMAC_FTR_1394_ENABLE, of_node, 0, 1); - } -#endif /* CONFIG_PPC_PMAC */ - - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); - err = pci_enable_device(pdev); - if (err) - return err; - - ohci = pci_get_drvdata(pdev); - if (!ohci) - return -1; /* or which exit status to use? */ - - PRINT(KERN_DEBUG, "resume called"); - - /* The following lines are copied from ohci1394_pci_probe(): */ - - /* Start off with a soft reset, to clear everything to a sane - * state. */ - ohci_soft_reset(ohci); - - /* Now enable LPS, which we need in order to start accessing - * most of the registers. In fact, on some cards (ALI M5251), - * accessing registers in the SClk domain without LPS enabled - * will lock up the machine. Wait 50msec to make sure we have - * full link enabled. */ - reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS); - - /* Disable and clear interrupts */ - reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); - reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); - - mdelay(50); - - ohci_initialize(ohci); - - return 0; -} - -static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state) -{ - int err; - struct ti_ohci *ohci; - - ohci = pci_get_drvdata(pdev); - if (!ohci) - return -1; /* Not sure if this is the correct return code */ + struct ti_ohci *ohci = pci_get_drvdata(pdev); PRINT(KERN_DEBUG, "suspend called"); + if (!ohci) + return -ENXIO; - /* clear the async DMA contexts and stop using the controller: */ + /* Clear the async DMA contexts and stop using the controller */ hpsb_bus_reset(ohci->host); - /* The following calls are from ohci1394_pci_remove(): */ - - /* Clear out BUS Options */ + /* See ohci1394_pci_remove() for comments on this sequence */ reg_write(ohci, OHCI1394_ConfigROMhdr, 0); reg_write(ohci, OHCI1394_BusOptions, (reg_read(ohci, OHCI1394_BusOptions) & 0x0000f007) | 0x00ff0000); - - /* Clear interrupt registers */ reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff); reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff); reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff); reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff); - - /* Disable IRM Contender */ set_phy_reg(ohci, 4, ~0xc0 & get_phy_reg(ohci, 4)); - - /* Clear link control register */ reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff); - - /* Let all other nodes know to ignore us */ ohci_devctl(ohci->host, RESET_BUS, LONG_RESET_NO_FORCE_ROOT); - - /* This stops all DMA contexts, disables interrupts, - * and clears linkEnable and LPS: */ ohci_soft_reset(ohci); err = pci_save_state(pdev); if (err) - goto out; + return err; err = pci_set_power_state(pdev, pci_choose_state(pdev, state)); if (err) - goto out; + return err; /* PowerMac suspend code comes last */ #ifdef CONFIG_PPC_PMAC @@ -3643,8 +3575,46 @@ static int ohci1394_pci_suspend (struct pci_dev *pdev, pm_message_t state) pmac_call_feature(PMAC_FTR_1394_ENABLE, of_node, 0, 0); } #endif /* CONFIG_PPC_PMAC */ -out: - return err; + + return 0; +} + +static int ohci1394_pci_resume(struct pci_dev *pdev) +{ + int err; + struct ti_ohci *ohci = pci_get_drvdata(pdev); + + PRINT(KERN_DEBUG, "resume called"); + if (!ohci) + return -ENXIO; + +/* PowerMac resume code comes first */ +#ifdef CONFIG_PPC_PMAC + if (machine_is(powermac)) { + struct device_node *of_node; + + /* Re-enable 1394 */ + of_node = pci_device_to_OF_node (pdev); + if (of_node) + pmac_call_feature (PMAC_FTR_1394_ENABLE, of_node, 0, 1); + } +#endif /* CONFIG_PPC_PMAC */ + + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + err = pci_enable_device(pdev); + if (err) + return err; + + /* See ohci1394_pci_probe() for comments on this sequence */ + ohci_soft_reset(ohci); + reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_LPS); + reg_write(ohci, OHCI1394_IntEventClear, 0xffffffff); + reg_write(ohci, OHCI1394_IntMaskClear, 0xffffffff); + mdelay(50); + ohci_initialize(ohci); + + return 0; } #endif /* CONFIG_PM */ |