110 lines
3.1 KiB
C
110 lines
3.1 KiB
C
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/*
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* OMAP4 CM instance functions
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*
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* Copyright (C) 2009 Nokia Corporation
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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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* This is needed since CM instances can be in the PRM, PRCM_MPU, CM1,
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* or CM2 hardware modules. For example, the EMU_CM CM instance is in
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* the PRM hardware module. What a mess...
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*/
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#include <linux/kernel.h>
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#include <linux/types.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 "cm.h"
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#include "cm1_44xx.h"
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#include "cm2_44xx.h"
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#include "cm44xx.h"
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#include "cminst44xx.h"
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#include "cm-regbits-44xx.h"
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#include "prcm44xx.h"
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#include "prm44xx.h"
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#include "prcm_mpu44xx.h"
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static u32 _cm_bases[OMAP4_MAX_PRCM_PARTITIONS] = {
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[OMAP4430_INVALID_PRCM_PARTITION] = 0,
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[OMAP4430_PRM_PARTITION] = OMAP4430_PRM_BASE,
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[OMAP4430_CM1_PARTITION] = OMAP4430_CM1_BASE,
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[OMAP4430_CM2_PARTITION] = OMAP4430_CM2_BASE,
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[OMAP4430_SCRM_PARTITION] = 0,
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[OMAP4430_PRCM_MPU_PARTITION] = OMAP4430_PRCM_MPU_BASE,
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};
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/* Read a register in a CM instance */
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u32 omap4_cminst_read_inst_reg(u8 part, s16 inst, u16 idx)
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{
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BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
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part == OMAP4430_INVALID_PRCM_PARTITION ||
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!_cm_bases[part]);
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return __raw_readl(OMAP2_L4_IO_ADDRESS(_cm_bases[part] + inst + idx));
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}
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/* Write into a register in a CM instance */
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void omap4_cminst_write_inst_reg(u32 val, u8 part, s16 inst, u16 idx)
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{
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BUG_ON(part >= OMAP4_MAX_PRCM_PARTITIONS ||
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part == OMAP4430_INVALID_PRCM_PARTITION ||
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!_cm_bases[part]);
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__raw_writel(val, OMAP2_L4_IO_ADDRESS(_cm_bases[part] + inst + idx));
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}
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/* Read-modify-write a register in CM1. Caller must lock */
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u32 omap4_cminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst,
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s16 idx)
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{
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u32 v;
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v = omap4_cminst_read_inst_reg(part, inst, idx);
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v &= ~mask;
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v |= bits;
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omap4_cminst_write_inst_reg(v, part, inst, idx);
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return v;
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}
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/**
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* omap4_cm_wait_module_ready - wait for a module to be in 'func' state
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* @clkctrl_reg: CLKCTRL module address
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*
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* Wait for the module IDLEST to be functional. If the idle state is in any
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* the non functional state (trans, idle or disabled), module and thus the
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* sysconfig cannot be accessed and will probably lead to an "imprecise
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* external abort"
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*
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* Module idle state:
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* 0x0 func: Module is fully functional, including OCP
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* 0x1 trans: Module is performing transition: wakeup, or sleep, or sleep
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* abortion
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* 0x2 idle: Module is in Idle mode (only OCP part). It is functional if
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* using separate functional clock
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* 0x3 disabled: Module is disabled and cannot be accessed
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*
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*/
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int omap4_cm_wait_module_ready(void __iomem *clkctrl_reg)
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{
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int i = 0;
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if (!clkctrl_reg)
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return 0;
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omap_test_timeout((
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((__raw_readl(clkctrl_reg) & OMAP4430_IDLEST_MASK) == 0) ||
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(((__raw_readl(clkctrl_reg) & OMAP4430_IDLEST_MASK) >>
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OMAP4430_IDLEST_SHIFT) == 0x2)),
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MAX_MODULE_READY_TIME, i);
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return (i < MAX_MODULE_READY_TIME) ? 0 : -EBUSY;
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}
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