1 files changed, 235 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..a482bfa0a954
--- /dev/null
+++ b/arch/arm/mach-omap2/cminst44xx.c
@@ -0,0 +1,235 @@
+/*
+ * 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-34xx.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;
+}
+
+u32 omap4_cminst_set_inst_reg_bits(u32 bits, u8 part, s16 inst, s16 idx)
+{
+        return omap4_cminst_rmw_inst_reg_bits(bits, bits, part, inst, idx);
+}
+
+u32 omap4_cminst_clear_inst_reg_bits(u32 bits, u8 part, s16 inst, s16 idx)
+{
+        return omap4_cminst_rmw_inst_reg_bits(bits, 0x0, part, inst, idx);
+}
+
+u32 omap4_cminst_read_inst_reg_bits(u8 part, u16 inst, s16 idx, u32 mask)
+{
+        u32 v;
+
+        v = omap4_cminst_read_inst_reg(part, inst, idx);
+        v &= mask;
+        v >>= __ffs(mask);
+
+        return v;
+}
+
+/*
+ *
+ */
+
+/**
+ * _clktrctrl_write - write @c to a CM_CLKSTCTRL.CLKTRCTRL register bitfield
+ * @c: CLKTRCTRL register bitfield (LSB = bit 0, i.e., unshifted)
+ * @part: PRCM partition ID that the CM_CLKSTCTRL register exists in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * @c must be the unshifted value for CLKTRCTRL - i.e., this function
+ * will handle the shift itself.
+ */
+static void _clktrctrl_write(u8 c, u8 part, s16 inst, u16 cdoffs)
+{
+        u32 v;
+
+        v = omap4_cminst_read_inst_reg(part, inst, cdoffs + OMAP4_CM_CLKSTCTRL);
+        v &= ~OMAP4430_CLKTRCTRL_MASK;
+        v |= c << OMAP4430_CLKTRCTRL_SHIFT;
+        omap4_cminst_write_inst_reg(v, part, inst, cdoffs + OMAP4_CM_CLKSTCTRL);
+}
+
+/**
+ * omap4_cminst_is_clkdm_in_hwsup - is a clockdomain in hwsup idle mode?
+ * @part: PRCM partition ID that the CM_CLKSTCTRL register exists in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Returns true if the clockdomain referred to by (@part, @inst, @cdoffs)
+ * is in hardware-supervised idle mode, or 0 otherwise.
+ */
+bool omap4_cminst_is_clkdm_in_hwsup(u8 part, s16 inst, u16 cdoffs)
+{
+        u32 v;
+
+        v = omap4_cminst_read_inst_reg(part, inst, cdoffs + OMAP4_CM_CLKSTCTRL);
+        v &= OMAP4430_CLKTRCTRL_MASK;
+        v >>= OMAP4430_CLKTRCTRL_SHIFT;
+
+        return (v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ? true : false;
+}
+
+/**
+ * omap4_cminst_clkdm_enable_hwsup - put a clockdomain in hwsup-idle mode
+ * @part: PRCM partition ID that the clockdomain registers exist in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@part, @inst, @cdoffs) into
+ * hardware-supervised idle mode.  No return value.
+ */
+void omap4_cminst_clkdm_enable_hwsup(u8 part, s16 inst, u16 cdoffs)
+{
+        _clktrctrl_write(OMAP34XX_CLKSTCTRL_ENABLE_AUTO, part, inst, cdoffs);
+}
+
+/**
+ * omap4_cminst_clkdm_disable_hwsup - put a clockdomain in swsup-idle mode
+ * @part: PRCM partition ID that the clockdomain registers exist in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@part, @inst, @cdoffs) into
+ * software-supervised idle mode, i.e., controlled manually by the
+ * Linux OMAP clockdomain code.  No return value.
+ */
+void omap4_cminst_clkdm_disable_hwsup(u8 part, s16 inst, u16 cdoffs)
+{
+        _clktrctrl_write(OMAP34XX_CLKSTCTRL_DISABLE_AUTO, part, inst, cdoffs);
+}
+
+/**
+ * omap4_cminst_clkdm_force_sleep - try to put a clockdomain into idle
+ * @part: PRCM partition ID that the clockdomain registers exist in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Put a clockdomain referred to by (@part, @inst, @cdoffs) into idle
+ * No return value.
+ */
+void omap4_cminst_clkdm_force_sleep(u8 part, s16 inst, u16 cdoffs)
+{
+        _clktrctrl_write(OMAP34XX_CLKSTCTRL_FORCE_SLEEP, part, inst, cdoffs);
+}
+
+/**
+ * omap4_cminst_clkdm_force_sleep - try to take a clockdomain out of idle
+ * @part: PRCM partition ID that the clockdomain registers exist in
+ * @inst: CM instance register offset (*_INST macro)
+ * @cdoffs: Clockdomain register offset (*_CDOFFS macro)
+ *
+ * Take a clockdomain referred to by (@part, @inst, @cdoffs) out of idle,
+ * waking it up.  No return value.
+ */
+void omap4_cminst_clkdm_force_wakeup(u8 part, s16 inst, u16 cdoffs)
+{
+        _clktrctrl_write(OMAP34XX_CLKSTCTRL_FORCE_WAKEUP, part, inst, cdoffs);
+}
+
+/*
+ *
+ */
+
+/**
+ * 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;
+}
+