Commit da256c55 authored by Stefan Richter's avatar Stefan Richter

ieee1394: ohci1394: suspend/resume cosmetics

Reorder the definitions of ohci1394_pci_suspend and _resume.  Remove
redundant comments.  Beautify return statements.
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent f011bf08
......@@ -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 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 */
......
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