1 files changed, 109 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cminst44xx.c b/arch/arm/mach-omap2/cminst44xx.c
new file mode 100644
index 000000000000..c13613b513b5
--- /dev/null
+++ b/arch/arm/mach-omap2/cminst44xx.c
@@ -0,0 +1,109 @@
+/*
+ * OMAP4 CM instance functions
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This is needed since CM instances can be in the PRM, PRCM_MPU, CM1,
+ * or CM2 hardware modules.  For example, the EMU_CM CM instance is in
+ * the PRM hardware module.  What a mess...
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <plat/common.h>
+
+#include "cm.h"
+#include "cm1_44xx.h"
+#include "cm2_44xx.h"
+#include "cm44xx.h"
+#include "cminst44xx.h"
+#include "cm-regbits-44xx.h"
+#include "prcm44xx.h"
+#include "prm44xx.h"
+#include "prcm_mpu44xx.h"
+
+static u32 _cm_bases[OMAP4_MAX_PRCM_PARTITIONS] = {
+	[OMAP4430_INVALID_PRCM_PARTITION]	= 0,
+	[OMAP4430_PRM_PARTITION]		= OMAP4430_PRM_BASE,
+	[OMAP4430_CM1_PARTITION]		= OMAP4430_CM1_BASE,
+	[OMAP4430_CM2_PARTITION]		= OMAP4430_CM2_BASE,
+	[OMAP4430_SCRM_PARTITION]		= 0,
+	[OMAP4430_PRCM_MPU_PARTITION]		= OMAP4430_PRCM_MPU_BASE,
+};
+
+/* Read a register in a CM instance */
+u32 omap4_cminst_read_inst_reg(u8 part, s16 inst, u16 idx)
+{
+	BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
+	       part == OMAP4430_INVALID_PRCM_PARTITION ||
+	       !_cm_bases[part]);
+	return __raw_readl(OMAP2_L4_IO_ADDRESS(_cm_bases[part] + inst + idx));
+}
+
+/* Write into a register in a CM instance */
+void omap4_cminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx)
+{
+	BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
+	       part == OMAP4430_INVALID_PRCM_PARTITION ||
+	       !_cm_bases[part]);
+	__raw_writel(val, OMAP2_L4_IO_ADDRESS(_cm_bases[part] + inst + idx));
+}
+
+/* Read-modify-write a register in CM1. Caller must lock */
+u32 omap4_cminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst,
+				   s16 idx)
+{
+	u32 v;
+
+	v = omap4_cminst_read_inst_reg(part, inst, idx);
+	v &= ~mask;
+	v |= bits;
+	omap4_cminst_write_inst_reg(v, part, inst, idx);
+
+	return v;
+}
+
+
+/**
+ * omap4_cm_wait_module_ready - wait for a module to be in 'func' state
+ * @clkctrl_reg: CLKCTRL module address
+ *
+ * Wait for the module IDLEST to be functional. If the idle state is in any
+ * the non functional state (trans, idle or disabled), module and thus the
+ * sysconfig cannot be accessed and will probably lead to an "imprecise
+ * external abort"
+ *
+ * Module idle state:
+ *   0x0 func:     Module is fully functional, including OCP
+ *   0x1 trans:    Module is performing transition: wakeup, or sleep, or sleep
+ *                 abortion
+ *   0x2 idle:     Module is in Idle mode (only OCP part). It is functional if
+ *                 using separate functional clock
+ *   0x3 disabled: Module is disabled and cannot be accessed
+ *
+ */
+int omap4_cm_wait_module_ready(void __iomem *clkctrl_reg)
+{
+	int i = 0;
+
+	if (!clkctrl_reg)
+		return 0;
+
+	omap_test_timeout((
+		((__raw_readl(clkctrl_reg) & OMAP4430_IDLEST_MASK) == 0) ||
+		 (((__raw_readl(clkctrl_reg) & OMAP4430_IDLEST_MASK) >>
+		  OMAP4430_IDLEST_SHIFT) == 0x2)),
+		MAX_MODULE_READY_TIME, i);
+
+	return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
+}
+