eaac329dfa
The RSTCTRL register was accessed using an absolute address. The usage of hardcoded macros to calculate virtual address from physical one should be avoided as much as possible. The usage of an offset will allow future improvement like migration from the current architecture code toward a module driver. Update prm_xxx accessors, move definition to the proper header file and update copyrights. Change the s16 register offset parameter to u16. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Rajendra Nayak <rnayak@ti.com> [paul@pwsan.com: use '_prminst_' in function names that are part of the prminst44xx.c file] Signed-off-by: Paul Walmsley <paul@pwsan.com>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/*
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* OMAP4 PRM module functions
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2010 Nokia Corporation
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* Benoît Cousson
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* Paul Walmsley
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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/kernel.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <plat/common.h>
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#include <plat/cpu.h>
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#include <plat/prcm.h>
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#include "prm44xx.h"
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#include "prm-regbits-44xx.h"
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/* PRM low-level functions */
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/* Read a register in a CM/PRM instance in the PRM module */
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u32 omap4_prm_read_inst_reg(s16 inst, u16 reg)
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{
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return __raw_readl(OMAP44XX_PRM_REGADDR(inst, reg));
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}
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/* Write into a register in a CM/PRM instance in the PRM module */
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void omap4_prm_write_inst_reg(u32 val, s16 inst, u16 reg)
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{
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__raw_writel(val, OMAP44XX_PRM_REGADDR(inst, reg));
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}
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/* Read-modify-write a register in a PRM module. Caller must lock */
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u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
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{
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u32 v;
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v = omap4_prm_read_inst_reg(inst, reg);
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v &= ~mask;
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v |= bits;
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omap4_prm_write_inst_reg(v, inst, reg);
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return v;
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}
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/* Read a PRM register, AND it, and shift the result down to bit 0 */
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/* XXX deprecated */
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u32 omap4_prm_read_bits_shift(void __iomem *reg, u32 mask)
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{
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u32 v;
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v = __raw_readl(reg);
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v &= mask;
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v >>= __ffs(mask);
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return v;
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}
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/* Read-modify-write a register in a PRM module. Caller must lock */
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/* XXX deprecated */
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u32 omap4_prm_rmw_reg_bits(u32 mask, u32 bits, void __iomem *reg)
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{
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u32 v;
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v = __raw_readl(reg);
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v &= ~mask;
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v |= bits;
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__raw_writel(v, reg);
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return v;
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}
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u32 omap4_prm_set_inst_reg_bits(u32 bits, s16 inst, s16 reg)
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{
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return omap4_prm_rmw_inst_reg_bits(bits, bits, inst, reg);
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}
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u32 omap4_prm_clear_inst_reg_bits(u32 bits, s16 inst, s16 reg)
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{
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return omap4_prm_rmw_inst_reg_bits(bits, 0x0, inst, reg);
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}
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void omap4_prm_global_warm_sw_reset(void)
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{
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u32 v;
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v = omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
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OMAP4_RM_RSTCTRL);
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v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
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omap4_prm_write_inst_reg(v, OMAP4430_PRM_DEVICE_INST,
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OMAP4_RM_RSTCTRL);
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/* OCP barrier */
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v = omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
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OMAP4_RM_RSTCTRL);
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}
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