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authorRafał Miłecki <zajec5@gmail.com>2013-06-17 20:34:32 +0400
committerJohn W. Linville <linville@tuxdriver.com>2013-06-17 22:38:53 +0400
commit972da7ec493b16b1d06c27832fad971466859fad (patch)
treef0cfee72b28531d5e575ea9762434e0f62767f0e /drivers/bcma
parent55fee98a6e732bea9f2da986b458e68ea462c584 (diff)
downloadlinux-972da7ec493b16b1d06c27832fad971466859fad.tar.xz
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>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/core.c28
1 files changed, 25 insertions, 3 deletions
diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c
index 17b26ce7e051..37a5ffe673d5 100644
--- 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));