59fb659b06
In preparation for adding OMAP4-specific PRCM accessor/mutator
functions, split the existing OMAP2/3 PRCM code into OMAP2/3-specific
files. Most of what was in mach-omap2/{cm,prm}.{c,h} has now been
moved into mach-omap2/{cm,prm}2xxx_3xxx.{c,h}, since it was
OMAP2xxx/3xxx-specific.
This process also requires the #includes in each of these files to be
changed to reference the new file name. As part of doing so, add some
comments into plat-omap/sram.c and plat-omap/mcbsp.c, which use
"sideways includes", to indicate that these users of the PRM/CM includes
should not be doing so.
Thanks to Felipe Contreras <felipe.contreras@gmail.com> for comments on this
patch.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Jarkko Nikula <jhnikula@gmail.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Acked-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Cc: Felipe Contreras <felipe.contreras@gmail.com>
Acked-by: Felipe Contreras <felipe.contreras@gmail.com>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Rajendra Nayak <rnayak@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
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* OMAP2/3 CM module 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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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/list.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 "cm2xxx_3xxx.h"
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#include "cm-regbits-24xx.h"
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#include "cm-regbits-34xx.h"
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static const u8 cm_idlest_offs[] = {
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CM_IDLEST1, CM_IDLEST2, OMAP2430_CM_IDLEST3
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};
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u32 cm_read_mod_reg(s16 module, u16 idx)
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{
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return __raw_readl(cm_base + module + idx);
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}
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void cm_write_mod_reg(u32 val, s16 module, u16 idx)
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{
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__raw_writel(val, cm_base + module + idx);
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}
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/* Read-modify-write a register in a CM module. Caller must lock */
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u32 cm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module, s16 idx)
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{
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u32 v;
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v = cm_read_mod_reg(module, idx);
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v &= ~mask;
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v |= bits;
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cm_write_mod_reg(v, module, idx);
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return v;
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}
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u32 cm_set_mod_reg_bits(u32 bits, s16 module, s16 idx)
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{
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return cm_rmw_mod_reg_bits(bits, bits, module, idx);
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}
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u32 cm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
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{
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return cm_rmw_mod_reg_bits(bits, 0x0, module, idx);
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}
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/**
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* omap2_cm_wait_idlest_ready - wait for a module to leave idle or standby
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* @prcm_mod: PRCM module offset
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* @idlest_id: CM_IDLESTx register ID (i.e., x = 1, 2, 3)
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* @idlest_shift: shift of the bit in the CM_IDLEST* register to check
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*
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* XXX document
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*/
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int omap2_cm_wait_module_ready(s16 prcm_mod, u8 idlest_id, u8 idlest_shift)
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{
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int ena = 0, i = 0;
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u8 cm_idlest_reg;
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u32 mask;
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if (!idlest_id || (idlest_id > ARRAY_SIZE(cm_idlest_offs)))
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return -EINVAL;
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cm_idlest_reg = cm_idlest_offs[idlest_id - 1];
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mask = 1 << idlest_shift;
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if (cpu_is_omap24xx())
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ena = mask;
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else if (cpu_is_omap34xx())
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ena = 0;
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else
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BUG();
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omap_test_timeout(((cm_read_mod_reg(prcm_mod, cm_idlest_reg) & mask) == ena),
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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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