hmatrix.c

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/*
 * High-Speed Bus Matrix helper functions
 *
 * Copyright (C) 2008 Atmel Corporation
 *
 * 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/clk.h>
#include <linux/io.h>

#include <mach/chip.h>
#include <mach/hmatrix.h>

static inline void __hmatrix_write_reg(unsigned long offset, u32 value)
{
    __raw_writel(value, (void __iomem __force *)(HMATRIX_BASE + offset));
}

static inline u32 __hmatrix_read_reg(unsigned long offset)
{
    return __raw_readl((void __iomem __force *)(HMATRIX_BASE + offset));
}

void hmatrix_write_reg(unsigned long offset, u32 value)
{
    clk_enable(&at32_hmatrix_clk);
    __hmatrix_write_reg(offset, value);
    __hmatrix_read_reg(offset);
    clk_disable(&at32_hmatrix_clk);
}

u32 hmatrix_read_reg(unsigned long offset)
{
    u32 value;

    clk_enable(&at32_hmatrix_clk);
    value = __hmatrix_read_reg(offset);
    clk_disable(&at32_hmatrix_clk);

    return value;
}

void hmatrix_sfr_set_bits(unsigned int slave_id, u32 mask)
{
    u32 value;

    clk_enable(&at32_hmatrix_clk);
    value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
    value |= mask;
    __hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
    __hmatrix_read_reg(HMATRIX_SFR(slave_id));
    clk_disable(&at32_hmatrix_clk);
}

void hmatrix_sfr_clear_bits(unsigned int slave_id, u32 mask)
{
    u32 value;

    clk_enable(&at32_hmatrix_clk);
    value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
    value &= ~mask;
    __hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
    __hmatrix_read_reg(HMATRIX_SFR(slave_id));
    clk_disable(&at32_hmatrix_clk);
}