zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/prm44xx.c b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/prm44xx.c
new file mode 100644
index 0000000..f106d21
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/arch/arm/mach-omap2/prm44xx.c
@@ -0,0 +1,242 @@
+/*
+ * OMAP4 PRM module functions
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2010 Nokia Corporation
+ * Benoît Cousson
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <plat/cpu.h>
+#include <plat/irqs.h>
+#include <plat/prcm.h>
+
+#include "iomap.h"
+#include "common.h"
+#include "vp.h"
+#include "prm44xx.h"
+#include "prm-regbits-44xx.h"
+#include "prcm44xx.h"
+#include "prminst44xx.h"
+
+static const struct omap_prcm_irq omap4_prcm_irqs[] = {
+ OMAP_PRCM_IRQ("wkup", 0, 0),
+ OMAP_PRCM_IRQ("io", 9, 1),
+};
+
+static struct omap_prcm_irq_setup omap4_prcm_irq_setup = {
+ .ack = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
+ .mask = OMAP4_PRM_IRQENABLE_MPU_OFFSET,
+ .nr_regs = 2,
+ .irqs = omap4_prcm_irqs,
+ .nr_irqs = ARRAY_SIZE(omap4_prcm_irqs),
+ .irq = OMAP44XX_IRQ_PRCM,
+ .read_pending_irqs = &omap44xx_prm_read_pending_irqs,
+ .ocp_barrier = &omap44xx_prm_ocp_barrier,
+ .save_and_clear_irqen = &omap44xx_prm_save_and_clear_irqen,
+ .restore_irqen = &omap44xx_prm_restore_irqen,
+};
+
+/* PRM low-level functions */
+
+/* Read a register in a CM/PRM instance in the PRM module */
+u32 omap4_prm_read_inst_reg(s16 inst, u16 reg)
+{
+ return __raw_readl(OMAP44XX_PRM_REGADDR(inst, reg));
+}
+
+/* Write into a register in a CM/PRM instance in the PRM module */
+void omap4_prm_write_inst_reg(u32 val, s16 inst, u16 reg)
+{
+ __raw_writel(val, OMAP44XX_PRM_REGADDR(inst, reg));
+}
+
+/* Read-modify-write a register in a PRM module. Caller must lock */
+u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
+{
+ u32 v;
+
+ v = omap4_prm_read_inst_reg(inst, reg);
+ v &= ~mask;
+ v |= bits;
+ omap4_prm_write_inst_reg(v, inst, reg);
+
+ return v;
+}
+
+/* PRM VP */
+
+/*
+ * struct omap4_vp - OMAP4 VP register access description.
+ * @irqstatus_mpu: offset to IRQSTATUS_MPU register for VP
+ * @tranxdone_status: VP_TRANXDONE_ST bitmask in PRM_IRQSTATUS_MPU reg
+ */
+struct omap4_vp {
+ u32 irqstatus_mpu;
+ u32 tranxdone_status;
+};
+
+static struct omap4_vp omap4_vp[] = {
+ [OMAP4_VP_VDD_MPU_ID] = {
+ .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET,
+ .tranxdone_status = OMAP4430_VP_MPU_TRANXDONE_ST_MASK,
+ },
+ [OMAP4_VP_VDD_IVA_ID] = {
+ .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
+ .tranxdone_status = OMAP4430_VP_IVA_TRANXDONE_ST_MASK,
+ },
+ [OMAP4_VP_VDD_CORE_ID] = {
+ .irqstatus_mpu = OMAP4_PRM_IRQSTATUS_MPU_OFFSET,
+ .tranxdone_status = OMAP4430_VP_CORE_TRANXDONE_ST_MASK,
+ },
+};
+
+u32 omap4_prm_vp_check_txdone(u8 vp_id)
+{
+ struct omap4_vp *vp = &omap4_vp[vp_id];
+ u32 irqstatus;
+
+ irqstatus = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
+ OMAP4430_PRM_OCP_SOCKET_INST,
+ vp->irqstatus_mpu);
+ return irqstatus & vp->tranxdone_status;
+}
+
+void omap4_prm_vp_clear_txdone(u8 vp_id)
+{
+ struct omap4_vp *vp = &omap4_vp[vp_id];
+
+ omap4_prminst_write_inst_reg(vp->tranxdone_status,
+ OMAP4430_PRM_PARTITION,
+ OMAP4430_PRM_OCP_SOCKET_INST,
+ vp->irqstatus_mpu);
+};
+
+u32 omap4_prm_vcvp_read(u8 offset)
+{
+ return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
+ OMAP4430_PRM_DEVICE_INST, offset);
+}
+
+void omap4_prm_vcvp_write(u32 val, u8 offset)
+{
+ omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION,
+ OMAP4430_PRM_DEVICE_INST, offset);
+}
+
+u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
+{
+ return omap4_prminst_rmw_inst_reg_bits(mask, bits,
+ OMAP4430_PRM_PARTITION,
+ OMAP4430_PRM_DEVICE_INST,
+ offset);
+}
+
+static inline u32 _read_pending_irq_reg(u16 irqen_offs, u16 irqst_offs)
+{
+ u32 mask, st;
+
+ /* XXX read mask from RAM? */
+ mask = omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ irqen_offs);
+ st = omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST, irqst_offs);
+
+ return mask & st;
+}
+
+/**
+ * omap44xx_prm_read_pending_irqs - read pending PRM MPU IRQs into @events
+ * @events: ptr to two consecutive u32s, preallocated by caller
+ *
+ * Read PRM_IRQSTATUS_MPU* bits, AND'ed with the currently-enabled PRM
+ * MPU IRQs, and store the result into the two u32s pointed to by @events.
+ * No return value.
+ */
+void omap44xx_prm_read_pending_irqs(unsigned long *events)
+{
+ events[0] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_OFFSET,
+ OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
+
+ events[1] = _read_pending_irq_reg(OMAP4_PRM_IRQENABLE_MPU_2_OFFSET,
+ OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
+}
+
+/**
+ * omap44xx_prm_ocp_barrier - force buffered MPU writes to the PRM to complete
+ *
+ * Force any buffered writes to the PRM IP block to complete. Needed
+ * by the PRM IRQ handler, which reads and writes directly to the IP
+ * block, to avoid race conditions after acknowledging or clearing IRQ
+ * bits. No return value.
+ */
+void omap44xx_prm_ocp_barrier(void)
+{
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_REVISION_PRM_OFFSET);
+}
+
+/**
+ * omap44xx_prm_save_and_clear_irqen - save/clear PRM_IRQENABLE_MPU* regs
+ * @saved_mask: ptr to a u32 array to save IRQENABLE bits
+ *
+ * Save the PRM_IRQENABLE_MPU and PRM_IRQENABLE_MPU_2 registers to
+ * @saved_mask. @saved_mask must be allocated by the caller.
+ * Intended to be used in the PRM interrupt handler suspend callback.
+ * The OCP barrier is needed to ensure the write to disable PRM
+ * interrupts reaches the PRM before returning; otherwise, spurious
+ * interrupts might occur. No return value.
+ */
+void omap44xx_prm_save_and_clear_irqen(u32 *saved_mask)
+{
+ saved_mask[0] =
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQSTATUS_MPU_OFFSET);
+ saved_mask[1] =
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQSTATUS_MPU_2_OFFSET);
+
+ omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_OFFSET);
+ omap4_prm_write_inst_reg(0, OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
+
+ /* OCP barrier */
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_REVISION_PRM_OFFSET);
+}
+
+/**
+ * omap44xx_prm_restore_irqen - set PRM_IRQENABLE_MPU* registers from args
+ * @saved_mask: ptr to a u32 array of IRQENABLE bits saved previously
+ *
+ * Restore the PRM_IRQENABLE_MPU and PRM_IRQENABLE_MPU_2 registers from
+ * @saved_mask. Intended to be used in the PRM interrupt handler resume
+ * callback to restore values saved by omap44xx_prm_save_and_clear_irqen().
+ * No OCP barrier should be needed here; any pending PRM interrupts will fire
+ * once the writes reach the PRM. No return value.
+ */
+void omap44xx_prm_restore_irqen(u32 *saved_mask)
+{
+ omap4_prm_write_inst_reg(saved_mask[0], OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_OFFSET);
+ omap4_prm_write_inst_reg(saved_mask[1], OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_2_OFFSET);
+}
+
+static int __init omap4xxx_prcm_init(void)
+{
+ if (cpu_is_omap44xx())
+ return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);
+ return 0;
+}
+subsys_initcall(omap4xxx_prcm_init);