/*
* 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 = DEVICE_REG32_R(DEVICE_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 = DEVICE_REG32_R(DEVICE_PSC_BASE +
PSC_REG_PDCTL(domain_num));
pdctl = PSC_REG_PDCTL_SET_NEXT(pdctl,
PSC_REG_VAL_PDCTL_NEXT_ON);
DEVICE_REG32_W(DEVICE_PSC_BASE + PSC_REG_PDCTL(domain_num),
pdctl);
}
/* Set the next state for the module to enabled/disabled */
mdctl = DEVICE_REG32_R(DEVICE_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);
DEVICE_REG32_W(DEVICE_PSC_BASE + PSC_REG_MDCTL(mod_num), mdctl);
/* Trigger the enable */
ptcmd = DEVICE_REG32_R(DEVICE_PSC_BASE + PSC_REG_PTCMD);
ptcmd |= (u32)(1<<domain_num);
DEVICE_REG32_W(DEVICE_PSC_BASE + PSC_REG_PTCMD, ptcmd);
/* Wait on the complete */
return psc_wait(domain_num);
}
/*
* 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 = DEVICE_REG32_R(DEVICE_PSC_BASE + PSC_REG_MDCTL(mod_num));
mdctl = PSC_REG_MDCTL_SET_RESET_ISO(mdctl, 1);
DEVICE_REG32_W(DEVICE_PSC_BASE + PSC_REG_MDCTL(mod_num), mdctl);
v = DEVICE_REG32_R(DEVICE_PSC_BASE + PSC_REG_MDCFG(mod_num));
if (PSC_REG_MDCFG_GET_RESET_ISO(v) == 1)
return 0;
return 1;
}
/**
* psc_set_reset_iso() - Set the reset isolation bit in mdctl
* @mod_num: LPSC module number
*
* The reset isolation enable bit is set. The state of the module is not
* changed.
*
* Return: 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;
}
