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