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-rw-r--r--arch/arm/cpu/armv7/keystone/psc.c227
1 files changed, 0 insertions, 227 deletions
diff --git a/arch/arm/cpu/armv7/keystone/psc.c b/arch/arm/cpu/armv7/keystone/psc.c
deleted file mode 100644
index 237e776..0000000
--- a/arch/arm/cpu/armv7/keystone/psc.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- * Keystone: PSC configuration module
- *
- * (C) Copyright 2012-2014
- * Texas Instruments Incorporated, <www.ti.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <asm-generic/errno.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/arch/psc_defs.h>
-
-int psc_delay(void)
-{
- udelay(10);
- return 10;
-}
-
-/*
- * FUNCTION PURPOSE: Wait for end of transitional state
- *
- * DESCRIPTION: Polls pstat for the selected domain and waits for transitions
- * to be complete.
- *
- * Since this is boot loader code it is *ASSUMED* that interrupts
- * are disabled and no other core is mucking around with the psc
- * at the same time.
- *
- * Returns 0 when the domain is free. Returns -1 if a timeout
- * occurred waiting for the completion.
- */
-int psc_wait(u32 domain_num)
-{
- u32 retry;
- u32 ptstat;
-
- /*
- * Do nothing if the power domain is in transition. This should never
- * happen since the boot code is the only software accesses psc.
- * It's still remotely possible that the hardware state machines
- * initiate transitions.
- * Don't trap if the domain (or a module in this domain) is
- * stuck in transition.
- */
- retry = 0;
-
- do {
- ptstat = __raw_readl(KS2_PSC_BASE + PSC_REG_PSTAT);
- ptstat = ptstat & (1 << domain_num);
- } while ((ptstat != 0) && ((retry += psc_delay()) <
- PSC_PTSTAT_TIMEOUT_LIMIT));
-
- if (retry >= PSC_PTSTAT_TIMEOUT_LIMIT)
- return -1;
-
- return 0;
-}
-
-u32 psc_get_domain_num(u32 mod_num)
-{
- u32 domain_num;
-
- /* Get the power domain associated with the module number */
- domain_num = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCFG(mod_num));
- domain_num = PSC_REG_MDCFG_GET_PD(domain_num);
-
- return domain_num;
-}
-
-/*
- * FUNCTION PURPOSE: Power up/down a module
- *
- * DESCRIPTION: Powers up/down the requested module and the associated power
- * domain if required. No action is taken it the module is
- * already powered up/down.
- *
- * This only controls modules. The domain in which the module
- * resides will be left in the power on state. Multiple modules
- * can exist in a power domain, so powering down the domain based
- * on a single module is not done.
- *
- * Returns 0 on success, -1 if the module can't be powered up, or
- * if there is a timeout waiting for the transition.
- */
-int psc_set_state(u32 mod_num, u32 state)
-{
- u32 domain_num;
- u32 pdctl;
- u32 mdctl;
- u32 ptcmd;
- u32 reset_iso;
- u32 v;
-
- /*
- * Get the power domain associated with the module number, and reset
- * isolation functionality
- */
- v = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCFG(mod_num));
- domain_num = PSC_REG_MDCFG_GET_PD(v);
- reset_iso = PSC_REG_MDCFG_GET_RESET_ISO(v);
-
- /* Wait for the status of the domain/module to be non-transitional */
- if (psc_wait(domain_num) != 0)
- return -1;
-
- /*
- * Perform configuration even if the current status matches the
- * existing state
- *
- * Set the next state of the power domain to on. It's OK if the domain
- * is always on. This code will not ever power down a domain, so no
- * change is made if the new state is power down.
- */
- if (state == PSC_REG_VAL_MDCTL_NEXT_ON) {
- pdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_PDCTL(domain_num));
- pdctl = PSC_REG_PDCTL_SET_NEXT(pdctl,
- PSC_REG_VAL_PDCTL_NEXT_ON);
- __raw_writel(pdctl, KS2_PSC_BASE + PSC_REG_PDCTL(domain_num));
- }
-
- /* Set the next state for the module to enabled/disabled */
- mdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
- mdctl = PSC_REG_MDCTL_SET_NEXT(mdctl, state);
- mdctl = PSC_REG_MDCTL_SET_RESET_ISO(mdctl, reset_iso);
- __raw_writel(mdctl, KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
-
- /* Trigger the enable */
- ptcmd = __raw_readl(KS2_PSC_BASE + PSC_REG_PTCMD);
- ptcmd |= (u32)(1<<domain_num);
- __raw_writel(ptcmd, KS2_PSC_BASE + PSC_REG_PTCMD);
-
- /* Wait on the complete */
- return psc_wait(domain_num);
-}
-
-/*
- * FUNCTION PURPOSE: Power up a module
- *
- * DESCRIPTION: Powers up the requested module and the associated power domain
- * if required. No action is taken it the module is already
- * powered up.
- *
- * Returns 0 on success, -1 if the module can't be powered up, or
- * if there is a timeout waiting for the transition.
- */
-int psc_enable_module(u32 mod_num)
-{
- u32 mdctl;
-
- /* Set the bit to apply reset */
- mdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
- if ((mdctl & 0x3f) == PSC_REG_VAL_MDSTAT_STATE_ON)
- return 0;
-
- return psc_set_state(mod_num, PSC_REG_VAL_MDCTL_NEXT_ON);
-}
-
-/*
- * FUNCTION PURPOSE: Power down a module
- *
- * DESCRIPTION: Powers down the requested module.
- *
- * Returns 0 on success, -1 on failure or timeout.
- */
-int psc_disable_module(u32 mod_num)
-{
- u32 mdctl;
-
- /* Set the bit to apply reset */
- mdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
- if ((mdctl & 0x3f) == 0)
- return 0;
- mdctl = PSC_REG_MDCTL_SET_LRSTZ(mdctl, 0);
- __raw_writel(mdctl, KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
-
- return psc_set_state(mod_num, PSC_REG_VAL_MDCTL_NEXT_SWRSTDISABLE);
-}
-
-/*
- * FUNCTION PURPOSE: Set the reset isolation bit in mdctl
- *
- * DESCRIPTION: The reset isolation enable bit is set. The state of the module
- * is not changed. Returns 0 if the module config showed that
- * reset isolation is supported. Returns 1 otherwise. This is not
- * an error, but setting the bit in mdctl has no effect.
- */
-int psc_set_reset_iso(u32 mod_num)
-{
- u32 v;
- u32 mdctl;
-
- /* Set the reset isolation bit */
- mdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
- mdctl = PSC_REG_MDCTL_SET_RESET_ISO(mdctl, 1);
- __raw_writel(mdctl, KS2_PSC_BASE + PSC_REG_MDCTL(mod_num));
-
- v = __raw_readl(KS2_PSC_BASE + PSC_REG_MDCFG(mod_num));
- if (PSC_REG_MDCFG_GET_RESET_ISO(v) == 1)
- return 0;
-
- return 1;
-}
-
-/*
- * FUNCTION PURPOSE: Disable a power domain
- *
- * DESCRIPTION: The power domain is disabled
- */
-int psc_disable_domain(u32 domain_num)
-{
- u32 pdctl;
- u32 ptcmd;
-
- pdctl = __raw_readl(KS2_PSC_BASE + PSC_REG_PDCTL(domain_num));
- pdctl = PSC_REG_PDCTL_SET_NEXT(pdctl, PSC_REG_VAL_PDCTL_NEXT_OFF);
- pdctl = PSC_REG_PDCTL_SET_PDMODE(pdctl, PSC_REG_VAL_PDCTL_PDMODE_SLEEP);
- __raw_writel(pdctl, KS2_PSC_BASE + PSC_REG_PDCTL(domain_num));
-
- ptcmd = __raw_readl(KS2_PSC_BASE + PSC_REG_PTCMD);
- ptcmd |= (u32)(1 << domain_num);
- __raw_writel(ptcmd, KS2_PSC_BASE + PSC_REG_PTCMD);
-
- return psc_wait(domain_num);
-}