bcma: update core (en|dis)abling functions

Broadocm updated their code, this may be needed for newer hardware or
some corner cases.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c
index 17b26ce..37a5ffe 100644 (file)
--- a/drivers/bcma/core.c
+++ b/drivers/bcma/core.c
@@ -9,6 +9,25 @@
 #include <linux/export.h>
 #include <linux/bcma/bcma.h>
 
+static bool bcma_core_wait_value(struct bcma_device *core, u16 reg, u32 mask,
+                                u32 value, int timeout)
+{
+       unsigned long deadline = jiffies + timeout;
+       u32 val;
+
+       do {
+               val = bcma_aread32(core, reg);
+               if ((val & mask) == value)
+                       return true;
+               cpu_relax();
+               udelay(10);
+       } while (!time_after_eq(jiffies, deadline));
+
+       bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);
+
+       return false;
+}
+
 bool bcma_core_is_enabled(struct bcma_device *core)
 {
        if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
@@ -25,13 +44,15 @@ void bcma_core_disable(struct bcma_device *core, u32 flags)
        if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
                return;
 
-       bcma_awrite32(core, BCMA_IOCTL, flags);
-       bcma_aread32(core, BCMA_IOCTL);
-       udelay(10);
+       bcma_core_wait_value(core, BCMA_RESET_ST, ~0, 0, 300);
 
        bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
        bcma_aread32(core, BCMA_RESET_CTL);
        udelay(1);
+
+       bcma_awrite32(core, BCMA_IOCTL, flags);
+       bcma_aread32(core, BCMA_IOCTL);
+       udelay(10);
 }
 EXPORT_SYMBOL_GPL(bcma_core_disable);
 
@@ -43,6 +64,7 @@ int bcma_core_enable(struct bcma_device *core, u32 flags)
        bcma_aread32(core, BCMA_IOCTL);
 
        bcma_awrite32(core, BCMA_RESET_CTL, 0);
+       bcma_aread32(core, BCMA_RESET_CTL);
        udelay(1);
 
        bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));