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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>
178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/*
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* OMAP4 powerdomain control
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*
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* Copyright (C) 2009-2010 Texas Instruments, Inc.
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* Copyright (C) 2007-2009 Nokia Corporation
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*
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* Derived from mach-omap2/powerdomain.c written by Paul Walmsley
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* Rajendra Nayak <rnayak@ti.com>
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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/io.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <plat/powerdomain.h>
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#include <plat/prcm.h>
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#include "prm2xxx_3xxx.h"
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#include "prm44xx.h"
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#include "prm-regbits-44xx.h"
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#include "powerdomains.h"
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static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
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{
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prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK,
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(pwrst << OMAP_POWERSTATE_SHIFT),
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pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
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return 0;
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}
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static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
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{
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return prm_read_mod_bits_shift(pwrdm->prcm_offs,
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OMAP4_PM_PWSTCTRL, OMAP_POWERSTATE_MASK);
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}
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static int omap4_pwrdm_read_pwrst(struct powerdomain *pwrdm)
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{
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return prm_read_mod_bits_shift(pwrdm->prcm_offs,
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OMAP4_PM_PWSTST, OMAP_POWERSTATEST_MASK);
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}
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static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
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{
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return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
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OMAP4430_LASTPOWERSTATEENTERED_MASK);
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}
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static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
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{
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prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
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(1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
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pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
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return 0;
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}
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static int omap4_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
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{
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prm_rmw_mod_reg_bits(OMAP4430_LASTPOWERSTATEENTERED_MASK,
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OMAP4430_LASTPOWERSTATEENTERED_MASK,
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pwrdm->prcm_offs, OMAP4_PM_PWSTST);
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return 0;
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}
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static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
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{
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u32 v;
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v = pwrst << __ffs(OMAP4430_LOGICRETSTATE_MASK);
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prm_rmw_mod_reg_bits(OMAP4430_LOGICRETSTATE_MASK, v,
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pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
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return 0;
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}
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static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
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u8 pwrst)
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{
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u32 m;
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m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);
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prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
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OMAP4_PM_PWSTCTRL);
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return 0;
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}
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static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
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u8 pwrst)
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{
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u32 m;
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m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
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prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
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OMAP4_PM_PWSTCTRL);
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return 0;
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}
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static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
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{
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return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
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OMAP4430_LOGICSTATEST_MASK);
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}
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static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
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{
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return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL,
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OMAP4430_LOGICRETSTATE_MASK);
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}
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static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
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{
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u32 m;
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m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
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return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST, m);
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}
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static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
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{
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u32 m;
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m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
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return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL, m);
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}
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static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
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{
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u32 c = 0;
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/*
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* REVISIT: pwrdm_wait_transition() may be better implemented
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* via a callback and a periodic timer check -- how long do we expect
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* powerdomain transitions to take?
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*/
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/* XXX Is this udelay() value meaningful? */
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while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP4_PM_PWSTST) &
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OMAP_INTRANSITION_MASK) &&
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(c++ < PWRDM_TRANSITION_BAILOUT))
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udelay(1);
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if (c > PWRDM_TRANSITION_BAILOUT) {
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printk(KERN_ERR "powerdomain: waited too long for "
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"powerdomain %s to complete transition\n", pwrdm->name);
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return -EAGAIN;
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}
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pr_debug("powerdomain: completed transition in %d loops\n", c);
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return 0;
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}
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struct pwrdm_ops omap4_pwrdm_operations = {
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.pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst,
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.pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst,
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.pwrdm_read_pwrst = omap4_pwrdm_read_pwrst,
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.pwrdm_read_prev_pwrst = omap4_pwrdm_read_prev_pwrst,
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.pwrdm_set_lowpwrstchange = omap4_pwrdm_set_lowpwrstchange,
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.pwrdm_clear_all_prev_pwrst = omap4_pwrdm_clear_all_prev_pwrst,
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.pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst,
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.pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst,
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.pwrdm_read_logic_retst = omap4_pwrdm_read_logic_retst,
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.pwrdm_read_mem_pwrst = omap4_pwrdm_read_mem_pwrst,
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.pwrdm_read_mem_retst = omap4_pwrdm_read_mem_retst,
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.pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst,
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.pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst,
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.pwrdm_wait_transition = omap4_pwrdm_wait_transition,
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};
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