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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));
}
/**
* hmatrix_write_reg - write HMATRIX configuration register
* @offset: register offset
* @value: value to be written to the register at @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);
}
/**
* hmatrix_read_reg - read HMATRIX configuration register
* @offset: register offset
*
* Returns the value of the register at @offset.
*/
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;
}
/**
* hmatrix_sfr_set_bits - set bits in a slave's Special Function Register
* @slave_id: operate on the SFR belonging to this slave
* @mask: mask of bits to be set in the SFR
*/
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);
}
/**
* hmatrix_sfr_set_bits - clear bits in a slave's Special Function Register
* @slave_id: operate on the SFR belonging to this slave
* @mask: mask of bits to be cleared in the SFR
*/
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);
}
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