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prminst44xx.c

/*
 * OMAP4 PRM 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.
 */

#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 "prm44xx.h"
#include "prminst44xx.h"
#include "prm-regbits-44xx.h"
#include "prcm44xx.h"
#include "prcm_mpu44xx.h"

static u32 _prm_bases[OMAP4_MAX_PRCM_PARTITIONS] = {
      [OMAP4430_INVALID_PRCM_PARTITION]   = 0,
      [OMAP4430_PRM_PARTITION]            = OMAP4430_PRM_BASE,
      [OMAP4430_CM1_PARTITION]            = 0,
      [OMAP4430_CM2_PARTITION]            = 0,
      [OMAP4430_SCRM_PARTITION]           = 0,
      [OMAP4430_PRCM_MPU_PARTITION]       = OMAP4430_PRCM_MPU_BASE,
};

/* Read a register in a PRM instance */
u32 omap4_prminst_read_inst_reg(u8 part, s16 inst, u16 idx)
{
      BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
             part == OMAP4430_INVALID_PRCM_PARTITION ||
             !_prm_bases[part]);
      return __raw_readl(OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst +
                                     idx));
}

/* Write into a register in a PRM instance */
void omap4_prminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx)
{
      BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
             part == OMAP4430_INVALID_PRCM_PARTITION ||
             !_prm_bases[part]);
      __raw_writel(val, OMAP2_L4_IO_ADDRESS(_prm_bases[part] + inst + idx));
}

/* Read-modify-write a register in PRM. Caller must lock */
u32 omap4_prminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst,
                           s16 idx)
{
      u32 v;

      v = omap4_prminst_read_inst_reg(part, inst, idx);
      v &= ~mask;
      v |= bits;
      omap4_prminst_write_inst_reg(v, part, inst, idx);

      return v;
}

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