From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 drivers/platform/sprd/glb.c | 85 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 drivers/platform/sprd/glb.c

(limited to 'drivers/platform/sprd/glb.c')

diff --git a/drivers/platform/sprd/glb.c b/drivers/platform/sprd/glb.c
new file mode 100644
index 00000000..2f9da396
--- /dev/null
+++ b/drivers/platform/sprd/glb.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2012 Spreadtrum Communications Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/hwspinlock.h>
+#include <linux/io.h>
+
+#include <soc/sprd/sci.h>
+#include <soc/sprd/sci_glb_regs.h>
+#include <soc/sprd/arch_lock.h>
+
+u32 sci_glb_read(unsigned long reg, u32 msk)
+{
+	return __raw_readl((void *)reg) & msk;
+}
+
+int sci_glb_write(unsigned long reg, u32 val, u32 msk)
+{
+	unsigned long flags;
+	__arch_default_lock(HWLOCK_GLB, &flags);
+	__raw_writel((__raw_readl((void *)reg) & ~msk) | val, (void *)reg);
+	__arch_default_unlock(HWLOCK_GLB, &flags);
+	return 0;
+}
+
+static int __is_glb(unsigned long reg)
+{
+#if	defined (CONFIG_ARCH_SCX35)
+	return 0;
+	return rounddown(reg, SZ_64K) == rounddown(REGS_GLB_BASE, SZ_64K) ||
+	    rounddown(reg, SZ_64K) == rounddown(REGS_AHB_BASE, SZ_64K) ||
+	    rounddown(reg, SZ_64K) == rounddown(REGS_AP_APB_BASE, SZ_64K) ||
+	    rounddown(reg, SZ_64K) == rounddown(REGS_PMU_APB_BASE, SZ_64K);
+
+#else
+	return rounddown(reg, SZ_64K) == rounddown(REGS_GLB_BASE, SZ_64K) ||
+	    rounddown(reg, SZ_64K) == rounddown(REGS_AHB_BASE, SZ_64K);
+#endif
+}
+
+int sci_glb_set(unsigned long reg, u32 bit)
+{
+	if (__is_glb(reg)) {
+		__raw_writel(bit, (void *)REG_GLB_SET(reg));
+	} else {
+		unsigned long flags;
+		__arch_default_lock(HWLOCK_GLB, &flags);
+		__raw_writel(__raw_readl((void *)reg) | bit, (void *)reg);
+		__arch_default_unlock(HWLOCK_GLB, &flags);
+	}
+	return 0;
+}
+
+int sci_glb_clr(unsigned long reg, u32 bit)
+{
+	if (__is_glb(reg)) {
+		__raw_writel(bit, (void *)REG_GLB_CLR(reg));
+	} else {
+		unsigned long flags;
+		__arch_default_lock(HWLOCK_GLB, &flags);
+		__raw_writel((__raw_readl((void *)reg) & ~bit), (void *)reg);
+		__arch_default_unlock(HWLOCK_GLB, &flags);
+	}
+	return 0;
+}
+
+EXPORT_SYMBOL(sci_glb_read);
+EXPORT_SYMBOL(sci_glb_write);
+EXPORT_SYMBOL(sci_glb_set);
+EXPORT_SYMBOL(sci_glb_clr);
+
-- 
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