From 972da7ec493b16b1d06c27832fad971466859fad Mon Sep 17 00:00:00 2001 From: Rafał Miłecki Date: Mon, 17 Jun 2013 18:34:32 +0200 Subject: bcma: update core (en|dis)abling functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Broadocm updated their code, this may be needed for newer hardware or some corner cases. Signed-off-by: Rafał Miłecki Signed-off-by: John W. Linville --- drivers/bcma/core.c | 28 +++++++++++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) (limited to 'drivers/bcma') 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 #include +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)); -- cgit v1.2.3-58-ga151