diff options
Diffstat (limited to 'drivers/ssb/driver_pcicore.c')
| -rw-r--r-- | drivers/ssb/driver_pcicore.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c index d75b72ba2672..5fe1c22e289b 100644 --- a/drivers/ssb/driver_pcicore.c +++ b/drivers/ssb/driver_pcicore.c @@ -357,6 +357,16 @@ static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc) pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA); + /* + * Accessing PCI config without a proper delay after devices reset (not + * GPIO reset) was causing reboots on WRT300N v1.0 (BCM4704). + * Tested delay 850 us lowered reboot chance to 50-80%, 1000 us fixed it + * completely. Flushing all writes was also tested but with no luck. + * The same problem was reported for WRT350N v1 (BCM4705), so we just + * sleep here unconditionally. + */ + usleep_range(1000, 2000); + /* Enable PCI bridge BAR0 prefetch and burst */ val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2); |
