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authorStefan Richter <stefanr@s5r6.in-berlin.de>2008-03-01 02:42:56 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-03-14 00:56:58 +0100
commitea8d006b91ac58ec5a0862d09e0b629db399517f (patch)
treec6f848d1ed3e7d71fd23dcee975d3449bcb7932b
parentefbf390a2d940315efff174455243e61f23c03b9 (diff)
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firewire: fw-ohci: PPC PMac platform code
Copied from ohci1394.c. This code is necessary to prevent machine check exceptions when reloading or resuming the driver. Tested on a 1st generation PowerBook G4 Titanium, which also needs the pci_probe() hunk. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> I was able to reproduce the system exception on resume with a 3rd-gen Titanium PowerBook G4 667, and this patch does let the system resume successfully now. Not quite clear if there was possibly an updated version coming using pci_enable_device() instead of the pair of pmac_call_feature() calls, but either way, this is a definite must-have, at least for older ppc macs -- my Aluminum PowerBook G4/1.67 suspends and resumes without this patch just fine. Signed-off-by: Jarod Wilson <jwilson@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
-rw-r--r--drivers/firewire/fw-ohci.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index f9440a760da..182be8672df 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -33,6 +33,10 @@
#include <asm/page.h>
#include <asm/system.h>
+#ifdef CONFIG_PPC_PMAC
+#include <asm/pmac_feature.h>
+#endif
+
#include "fw-ohci.h"
#include "fw-transaction.h"
@@ -2048,6 +2052,18 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
int err;
size_t size;
+#ifdef CONFIG_PPC_PMAC
+ /* Necessary on some machines if fw-ohci was loaded/ unloaded before */
+ if (machine_is(powermac)) {
+ struct device_node *ofn = pci_device_to_OF_node(dev);
+
+ if (ofn) {
+ pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
+ pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
+ }
+ }
+#endif /* CONFIG_PPC_PMAC */
+
ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
if (ohci == NULL) {
fw_error("Could not malloc fw_ohci data.\n");
@@ -2182,6 +2198,19 @@ static void pci_remove(struct pci_dev *dev)
pci_disable_device(dev);
fw_card_put(&ohci->card);
+#ifdef CONFIG_PPC_PMAC
+ /* On UniNorth, power down the cable and turn off the chip clock
+ * to save power on laptops */
+ if (machine_is(powermac)) {
+ struct device_node *ofn = pci_device_to_OF_node(dev);
+
+ if (ofn) {
+ pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
+ pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
+ }
+ }
+#endif /* CONFIG_PPC_PMAC */
+
fw_notify("Removed fw-ohci device.\n");
}
@@ -2202,6 +2231,16 @@ static int pci_suspend(struct pci_dev *pdev, pm_message_t state)
if (err)
fw_error("pci_set_power_state failed with %d\n", err);
+/* PowerMac suspend code comes last */
+#ifdef CONFIG_PPC_PMAC
+ if (machine_is(powermac)) {
+ struct device_node *ofn = pci_device_to_OF_node(pdev);
+
+ if (ofn)
+ pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
+ }
+#endif /* CONFIG_PPC_PMAC */
+
return 0;
}
@@ -2210,6 +2249,16 @@ static int pci_resume(struct pci_dev *pdev)
struct fw_ohci *ohci = pci_get_drvdata(pdev);
int err;
+/* PowerMac resume code comes first */
+#ifdef CONFIG_PPC_PMAC
+ if (machine_is(powermac)) {
+ struct device_node *ofn = pci_device_to_OF_node(pdev);
+
+ if (ofn)
+ pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
+ }
+#endif /* CONFIG_PPC_PMAC */
+
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
err = pci_enable_device(pdev);