mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-11 22:22:30 +02:00
184 lines
5.4 KiB
Diff
184 lines
5.4 KiB
Diff
|
the current ssb irq setup (in ssb_mipscore_init) have some problem :
|
||
|
it configure some device on some irq without checking that the irq is not taken by an other device.
|
||
|
|
||
|
For example in my case PCI host is on irq 0 and IPSEC on irq 3.
|
||
|
The current code :
|
||
|
- store in dev->irq that IPSEC irq is 3+2
|
||
|
- do a set_irq 0->3 on PCI host
|
||
|
|
||
|
But now IPSEC irq is not routed anymore to the mips code and dev->irq is wrong. This cause problem described in [1].
|
||
|
|
||
|
This patch try to solve the problem by making set_irq configure the device we want to take the irq on the shared irq0.
|
||
|
The previous example become :
|
||
|
- store in dev->irq that IPSEC irq is 3+2
|
||
|
- do a set_irq 0->3 on PCI host :
|
||
|
- irq 3 is already taken by IPSEC. do a set_irq 3->0 on IPSEC
|
||
|
|
||
|
|
||
|
I also added some code to print the irq configuration before and after irq setup to allow easier debugging. And I add extra checking in ssb_mips_irq to report device without irq or device with not routed irq.
|
||
|
|
||
|
|
||
|
[1] http://www.danm.de/files/src/bcm5365p/REPORTED_DEVICES
|
||
|
|
||
|
Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
|
||
|
--- a/drivers/ssb/driver_mipscore.c
|
||
|
+++ b/drivers/ssb/driver_mipscore.c
|
||
|
@@ -49,29 +49,54 @@ static const u32 ipsflag_irq_shift[] = {
|
||
|
|
||
|
static inline u32 ssb_irqflag(struct ssb_device *dev)
|
||
|
{
|
||
|
- return ssb_read32(dev, SSB_TPSFLAG) & SSB_TPSFLAG_BPFLAG;
|
||
|
+ u32 tpsflag = ssb_read32(dev, SSB_TPSFLAG);
|
||
|
+ if (tpsflag)
|
||
|
+ return ssb_read32(dev, SSB_TPSFLAG) & SSB_TPSFLAG_BPFLAG;
|
||
|
+ else
|
||
|
+ /* not irq supported */
|
||
|
+ return 0x3f;
|
||
|
+}
|
||
|
+
|
||
|
+static struct ssb_device *find_device(struct ssb_device *rdev, int irqflag)
|
||
|
+{
|
||
|
+ struct ssb_bus *bus = rdev->bus;
|
||
|
+ int i;
|
||
|
+ for (i = 0; i < bus->nr_devices; i++) {
|
||
|
+ struct ssb_device *dev;
|
||
|
+ dev = &(bus->devices[i]);
|
||
|
+ if (ssb_irqflag(dev) == irqflag)
|
||
|
+ return dev;
|
||
|
+ }
|
||
|
+ return NULL;
|
||
|
}
|
||
|
|
||
|
/* Get the MIPS IRQ assignment for a specified device.
|
||
|
* If unassigned, 0 is returned.
|
||
|
+ * If disabled, 5 is returned.
|
||
|
+ * If not supported, 6 is returned.
|
||
|
*/
|
||
|
unsigned int ssb_mips_irq(struct ssb_device *dev)
|
||
|
{
|
||
|
struct ssb_bus *bus = dev->bus;
|
||
|
+ struct ssb_device *mdev = bus->mipscore.dev;
|
||
|
u32 irqflag;
|
||
|
u32 ipsflag;
|
||
|
u32 tmp;
|
||
|
unsigned int irq;
|
||
|
|
||
|
irqflag = ssb_irqflag(dev);
|
||
|
+ if (irqflag == 0x3f)
|
||
|
+ return 6;
|
||
|
ipsflag = ssb_read32(bus->mipscore.dev, SSB_IPSFLAG);
|
||
|
for (irq = 1; irq <= 4; irq++) {
|
||
|
tmp = ((ipsflag & ipsflag_irq_mask[irq]) >> ipsflag_irq_shift[irq]);
|
||
|
if (tmp == irqflag)
|
||
|
break;
|
||
|
}
|
||
|
- if (irq == 5)
|
||
|
- irq = 0;
|
||
|
+ if (irq == 5) {
|
||
|
+ if ((1 << irqflag) & ssb_read32(mdev, SSB_INTVEC))
|
||
|
+ irq = 0;
|
||
|
+ }
|
||
|
|
||
|
return irq;
|
||
|
}
|
||
|
@@ -97,25 +122,56 @@ static void set_irq(struct ssb_device *d
|
||
|
struct ssb_device *mdev = bus->mipscore.dev;
|
||
|
u32 irqflag = ssb_irqflag(dev);
|
||
|
|
||
|
+ BUG_ON(oldirq == 6);
|
||
|
+
|
||
|
dev->irq = irq + 2;
|
||
|
|
||
|
- ssb_dprintk(KERN_INFO PFX
|
||
|
- "set_irq: core 0x%04x, irq %d => %d\n",
|
||
|
- dev->id.coreid, oldirq, irq);
|
||
|
/* clear the old irq */
|
||
|
if (oldirq == 0)
|
||
|
ssb_write32(mdev, SSB_INTVEC, (~(1 << irqflag) & ssb_read32(mdev, SSB_INTVEC)));
|
||
|
- else
|
||
|
+ else if (oldirq != 5)
|
||
|
clear_irq(bus, oldirq);
|
||
|
|
||
|
/* assign the new one */
|
||
|
if (irq == 0) {
|
||
|
ssb_write32(mdev, SSB_INTVEC, ((1 << irqflag) | ssb_read32(mdev, SSB_INTVEC)));
|
||
|
} else {
|
||
|
+ u32 ipsflag = ssb_read32(mdev, SSB_IPSFLAG);
|
||
|
+ if ((ipsflag & ipsflag_irq_mask[irq]) != ipsflag_irq_mask[irq]) {
|
||
|
+ u32 oldipsflag = (ipsflag & ipsflag_irq_mask[irq]) >> ipsflag_irq_shift[irq];
|
||
|
+ struct ssb_device *olddev = find_device(dev, oldipsflag);
|
||
|
+ if (olddev)
|
||
|
+ set_irq(olddev, 0);
|
||
|
+ }
|
||
|
irqflag <<= ipsflag_irq_shift[irq];
|
||
|
- irqflag |= (ssb_read32(mdev, SSB_IPSFLAG) & ~ipsflag_irq_mask[irq]);
|
||
|
+ irqflag |= (ipsflag & ~ipsflag_irq_mask[irq]);
|
||
|
ssb_write32(mdev, SSB_IPSFLAG, irqflag);
|
||
|
}
|
||
|
+ ssb_dprintk(KERN_INFO PFX
|
||
|
+ "set_irq: core 0x%04x, irq %d => %d\n",
|
||
|
+ dev->id.coreid, oldirq+2, irq+2);
|
||
|
+}
|
||
|
+
|
||
|
+static void print_irq(struct ssb_device *dev, unsigned int irq)
|
||
|
+{
|
||
|
+ int i;
|
||
|
+ static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
|
||
|
+ ssb_dprintk(KERN_INFO PFX
|
||
|
+ "core 0x%04x, irq :", dev->id.coreid);
|
||
|
+ for (i = 0; i <= 6; i++) {
|
||
|
+ ssb_dprintk(" %s%s", irq_name[i], i==irq?"*":" ");
|
||
|
+ }
|
||
|
+ ssb_dprintk("\n");
|
||
|
+}
|
||
|
+
|
||
|
+static void dump_irq(struct ssb_bus *bus)
|
||
|
+{
|
||
|
+ int i;
|
||
|
+ for (i = 0; i < bus->nr_devices; i++) {
|
||
|
+ struct ssb_device *dev;
|
||
|
+ dev = &(bus->devices[i]);
|
||
|
+ print_irq(dev, ssb_mips_irq(dev));
|
||
|
+ }
|
||
|
}
|
||
|
|
||
|
static void ssb_mips_serial_init(struct ssb_mipscore *mcore)
|
||
|
@@ -197,18 +253,26 @@ void ssb_mipscore_init(struct ssb_mipsco
|
||
|
else if (bus->chipco.dev)
|
||
|
ssb_chipco_timing_init(&bus->chipco, ns);
|
||
|
|
||
|
+ dump_irq(bus);
|
||
|
/* Assign IRQs to all cores on the bus, start with irq line 2, because serial usually takes 1 */
|
||
|
for (irq = 2, i = 0; i < bus->nr_devices; i++) {
|
||
|
+ int mips_irq;
|
||
|
dev = &(bus->devices[i]);
|
||
|
- dev->irq = ssb_mips_irq(dev) + 2;
|
||
|
+ mips_irq = ssb_mips_irq(dev);
|
||
|
+ if (mips_irq > 4)
|
||
|
+ dev->irq = 0;
|
||
|
+ else
|
||
|
+ dev->irq = mips_irq + 2;
|
||
|
+ if (dev->irq > 5)
|
||
|
+ continue;
|
||
|
switch (dev->id.coreid) {
|
||
|
case SSB_DEV_USB11_HOST:
|
||
|
/* shouldn't need a separate irq line for non-4710, most of them have a proper
|
||
|
* external usb controller on the pci */
|
||
|
if ((bus->chip_id == 0x4710) && (irq <= 4)) {
|
||
|
set_irq(dev, irq++);
|
||
|
- break;
|
||
|
}
|
||
|
+ break;
|
||
|
/* fallthrough */
|
||
|
case SSB_DEV_PCI:
|
||
|
case SSB_DEV_ETHERNET:
|
||
|
@@ -222,6 +286,8 @@ void ssb_mipscore_init(struct ssb_mipsco
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
+ ssb_dprintk(KERN_INFO PFX "after irq reconfiguration\n");
|
||
|
+ dump_irq(bus);
|
||
|
|
||
|
ssb_mips_serial_init(mcore);
|
||
|
ssb_mips_flash_detect(mcore);
|