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bcma: update core (en|dis)abling functions

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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>
This commit is contained in:
Rafał Miłecki 2013-06-17 18:34:32 +02:00 committed by John W. Linville
parent 55fee98a6e
commit 972da7ec49
1 changed files with 25 additions and 3 deletions
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28
drivers/bcma/core.c
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@ -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));