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path: root/drivers/bcma/core.c
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-rw-r--r--drivers/bcma/core.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c
new file mode 100644
index 00000000000..ced379f7b37
--- /dev/null
+++ b/drivers/bcma/core.c
@@ -0,0 +1,51 @@
+/*
+ * Broadcom specific AMBA
+ * Core ops
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+bool bcma_core_is_enabled(struct bcma_device *core)
+{
+ if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
+ != BCMA_IOCTL_CLK)
+ return false;
+ if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
+ return false;
+ return true;
+}
+EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
+
+static 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_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
+ udelay(1);
+}
+
+int bcma_core_enable(struct bcma_device *core, u32 flags)
+{
+ bcma_core_disable(core, flags);
+
+ bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
+ bcma_aread32(core, BCMA_IOCTL);
+
+ bcma_awrite32(core, BCMA_RESET_CTL, 0);
+ udelay(1);
+
+ bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
+ bcma_aread32(core, BCMA_IOCTL);
+ udelay(1);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(bcma_core_enable);