89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
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/*
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* High-Speed Bus Matrix helper functions
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <mach/chip.h>
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#include <mach/hmatrix.h>
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static inline void __hmatrix_write_reg(unsigned long offset, u32 value)
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{
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__raw_writel(value, (void __iomem __force *)(HMATRIX_BASE + offset));
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}
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static inline u32 __hmatrix_read_reg(unsigned long offset)
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{
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return __raw_readl((void __iomem __force *)(HMATRIX_BASE + offset));
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}
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/**
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* hmatrix_write_reg - write HMATRIX configuration register
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* @offset: register offset
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* @value: value to be written to the register at @offset
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*/
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void hmatrix_write_reg(unsigned long offset, u32 value)
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{
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clk_enable(&at32_hmatrix_clk);
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__hmatrix_write_reg(offset, value);
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__hmatrix_read_reg(offset);
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clk_disable(&at32_hmatrix_clk);
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}
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/**
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* hmatrix_read_reg - read HMATRIX configuration register
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* @offset: register offset
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*
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* Returns the value of the register at @offset.
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*/
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u32 hmatrix_read_reg(unsigned long offset)
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{
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u32 value;
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clk_enable(&at32_hmatrix_clk);
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value = __hmatrix_read_reg(offset);
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clk_disable(&at32_hmatrix_clk);
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return value;
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}
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/**
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* hmatrix_sfr_set_bits - set bits in a slave's Special Function Register
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* @slave_id: operate on the SFR belonging to this slave
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* @mask: mask of bits to be set in the SFR
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*/
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void hmatrix_sfr_set_bits(unsigned int slave_id, u32 mask)
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{
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u32 value;
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clk_enable(&at32_hmatrix_clk);
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value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
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value |= mask;
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__hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
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__hmatrix_read_reg(HMATRIX_SFR(slave_id));
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clk_disable(&at32_hmatrix_clk);
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}
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/**
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* hmatrix_sfr_set_bits - clear bits in a slave's Special Function Register
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* @slave_id: operate on the SFR belonging to this slave
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* @mask: mask of bits to be cleared in the SFR
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*/
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void hmatrix_sfr_clear_bits(unsigned int slave_id, u32 mask)
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{
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u32 value;
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clk_enable(&at32_hmatrix_clk);
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value = __hmatrix_read_reg(HMATRIX_SFR(slave_id));
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value &= ~mask;
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__hmatrix_write_reg(HMATRIX_SFR(slave_id), value);
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__hmatrix_read_reg(HMATRIX_SFR(slave_id));
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clk_disable(&at32_hmatrix_clk);
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}
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