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authorStefan Richter <stefanr@s5r6.in-berlin.de>2008-02-29 20:42:56 -0500
committerStefan Richter <stefanr@s5r6.in-berlin.de>2008-03-13 19:56:58 -0400
commitea8d006b91ac58ec5a0862d09e0b629db399517f (patch)
treec6f848d1ed3e7d71fd23dcee975d3449bcb7932b /drivers
parentefbf390a2d940315efff174455243e61f23c03b9 (diff)
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>
Diffstat (limited to 'drivers')
-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 f9440a760da6..182be8672dfd 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -33,6 +33,10 @@
33#include <asm/page.h> 33#include <asm/page.h>
34#include <asm/system.h> 34#include <asm/system.h>
35 35
36#ifdef CONFIG_PPC_PMAC
37#include <asm/pmac_feature.h>
38#endif
39
36#include "fw-ohci.h" 40#include "fw-ohci.h"
37#include "fw-transaction.h" 41#include "fw-transaction.h"
38 42
@@ -2048,6 +2052,18 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
2048 int err; 2052 int err;
2049 size_t size; 2053 size_t size;
2050 2054
2055#ifdef CONFIG_PPC_PMAC
2056 /* Necessary on some machines if fw-ohci was loaded/ unloaded before */
2057 if (machine_is(powermac)) {
2058 struct device_node *ofn = pci_device_to_OF_node(dev);
2059
2060 if (ofn) {
2061 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 1);
2062 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
2063 }
2064 }
2065#endif /* CONFIG_PPC_PMAC */
2066
2051 ohci = kzalloc(sizeof(*ohci), GFP_KERNEL); 2067 ohci = kzalloc(sizeof(*ohci), GFP_KERNEL);
2052 if (ohci == NULL) { 2068 if (ohci == NULL) {
2053 fw_error("Could not malloc fw_ohci data.\n"); 2069 fw_error("Could not malloc fw_ohci data.\n");
@@ -2182,6 +2198,19 @@ static void pci_remove(struct pci_dev *dev)
2182 pci_disable_device(dev); 2198 pci_disable_device(dev);
2183 fw_card_put(&ohci->card); 2199 fw_card_put(&ohci->card);
2184 2200
2201#ifdef CONFIG_PPC_PMAC
2202 /* On UniNorth, power down the cable and turn off the chip clock
2203 * to save power on laptops */
2204 if (machine_is(powermac)) {
2205 struct device_node *ofn = pci_device_to_OF_node(dev);
2206
2207 if (ofn) {
2208 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
2209 pmac_call_feature(PMAC_FTR_1394_CABLE_POWER, ofn, 0, 0);
2210 }
2211 }
2212#endif /* CONFIG_PPC_PMAC */
2213
2185 fw_notify("Removed fw-ohci device.\n"); 2214 fw_notify("Removed fw-ohci device.\n");
2186} 2215}
2187 2216
@@ -2202,6 +2231,16 @@ static int pci_suspend(struct pci_dev *pdev, pm_message_t state)
2202 if (err) 2231 if (err)
2203 fw_error("pci_set_power_state failed with %d\n", err); 2232 fw_error("pci_set_power_state failed with %d\n", err);
2204 2233
2234/* PowerMac suspend code comes last */
2235#ifdef CONFIG_PPC_PMAC
2236 if (machine_is(powermac)) {
2237 struct device_node *ofn = pci_device_to_OF_node(pdev);
2238
2239 if (ofn)
2240 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 0);
2241 }
2242#endif /* CONFIG_PPC_PMAC */
2243
2205 return 0; 2244 return 0;
2206} 2245}
2207 2246
@@ -2210,6 +2249,16 @@ static int pci_resume(struct pci_dev *pdev)
2210 struct fw_ohci *ohci = pci_get_drvdata(pdev); 2249 struct fw_ohci *ohci = pci_get_drvdata(pdev);
2211 int err; 2250 int err;
2212 2251
2252/* PowerMac resume code comes first */
2253#ifdef CONFIG_PPC_PMAC
2254 if (machine_is(powermac)) {
2255 struct device_node *ofn = pci_device_to_OF_node(pdev);
2256
2257 if (ofn)
2258 pmac_call_feature(PMAC_FTR_1394_ENABLE, ofn, 0, 1);
2259 }
2260#endif /* CONFIG_PPC_PMAC */
2261
2213 pci_set_power_state(pdev, PCI_D0); 2262 pci_set_power_state(pdev, PCI_D0);
2214 pci_restore_state(pdev); 2263 pci_restore_state(pdev);
2215 err = pci_enable_device(pdev); 2264 err = pci_enable_device(pdev);