void omap4_prminst_global_cold_sw_reset(void)
{
u32 v;
s16 dev_inst = cpu_is_omap44xx() ? OMAP4430_PRM_DEVICE_INST :
OMAP54XX_PRM_DEVICE_INST;
/* If bootloader/PPA has'nt cleared, ensure it is cleared */
omap4_prminst_write_inst_reg(OMAP4430_GLOBAL_COLD_RST_MASK,
OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_RM_RSTST);
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_RM_RSTCTRL);
v |= OMAP4430_RST_GLOBAL_COLD_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_RM_RSTCTRL);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_RM_RSTCTRL);
/*
* Upon writing the PRM_RSTCTRL.RST_GLOBAL_COLD_SW to '1',
* PRCM takes 2-3 32KHz clock cycles to assert cold reset
* inside OMAP - approx 91.6uSec. Wait double that time.
*/
udelay(184);
}
void omap4_prminst_global_warm_sw_reset(void)
{
u32 v;
s16 dev_inst;
if (cpu_is_omap44xx())
dev_inst = OMAP4430_PRM_DEVICE_INST;
else if (soc_is_omap54xx())
dev_inst = OMAP54XX_PRM_DEVICE_INST;
else if (soc_is_dra7xx())
dev_inst = DRA7XX_PRM_DEVICE_INST;
else if (soc_is_am43xx())
dev_inst = AM43XX_PRM_DEVICE_INST;
else
return;
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
}
static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
{
u32 c = 0;
/*
* REVISIT: pwrdm_wait_transition() may be better implemented
* via a callback and a periodic timer check -- how long do we expect
* powerdomain transitions to take?
*/
/* XXX Is this udelay() value meaningful? */
while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,
pwrdm->prcm_offs,
OMAP4_PM_PWSTST) &
OMAP_INTRANSITION_MASK) &&
(c++ < PWRDM_TRANSITION_BAILOUT))
udelay(1);
if (c > PWRDM_TRANSITION_BAILOUT) {
printk(KERN_ERR "powerdomain: waited too long for "
"powerdomain %s to complete transition\n", pwrdm->name);
return -EAGAIN;
}
pr_debug("powerdomain: completed transition in %d loops\n", c);
return 0;
}
void omap4_prminst_global_warm_sw_reset(void)
{
u32 v;
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_RSTCTRL_OFFSET);
v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_RSTCTRL_OFFSET);
}
void omap4_prminst_global_warm_sw_reset(void)
{
u32 v;
s32 inst = omap4_prmst_get_prm_dev_inst();
if (inst == PRM_INSTANCE_UNKNOWN)
return;
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, inst,
OMAP4_PRM_RSTCTRL_OFFSET);
v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
inst, OMAP4_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
inst, OMAP4_PRM_RSTCTRL_OFFSET);
}
/**
* omap4_mpuss_read_prev_context_state:
* Function returns the MPUSS previous context state
*/
u32 omap4_mpuss_read_prev_context_state(void)
{
u32 reg;
reg = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_MPU_INST, OMAP4_RM_MPU_MPU_CONTEXT_OFFSET);
reg &= OMAP4430_LOSTCONTEXT_DFF_MASK;
return reg;
}
/* Helper functions for MPUSS OSWR */
static inline void mpuss_clear_prev_logic_pwrst(void)
{
u32 reg;
reg = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_MPU_INST, OMAP4_RM_MPU_MPU_CONTEXT_OFFSET);
omap4_prminst_write_inst_reg(reg, OMAP4430_PRM_PARTITION,
OMAP4430_PRM_MPU_INST, OMAP4_RM_MPU_MPU_CONTEXT_OFFSET);
}
void omap4_prminst_global_warm_sw_reset(void)
{
u32 v;
s16 dev_inst = cpu_is_omap44xx() ? OMAP4430_PRM_DEVICE_INST :
OMAP54XX_PRM_DEVICE_INST;
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
dev_inst,
OMAP4_PRM_RSTCTRL_OFFSET);
}
static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTST);
v &= OMAP4430_LASTPOWERSTATEENTERED_MASK;
v >>= OMAP4430_LASTPOWERSTATEENTERED_SHIFT;
return v;
}
static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= OMAP4430_LOGICRETSTATE_MASK;
v >>= OMAP4430_LOGICRETSTATE_SHIFT;
return v;
}
static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
{
u32 v;
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= OMAP_POWERSTATE_MASK;
v >>= OMAP_POWERSTATE_SHIFT;
return v;
}
/**
* omap4_prminst_is_hardreset_asserted - read the HW reset line state of
* submodules contained in the hwmod module
* @rstctrl_reg: RM_RSTCTRL register address for this module
* @shift: register bit shift corresponding to the reset line to check
*
* Returns 1 if the (sub)module hardreset line is currently asserted,
* 0 if the (sub)module hardreset line is not currently asserted, or
* -EINVAL upon parameter error.
*/
int omap4_prminst_is_hardreset_asserted(u8 shift, u8 part, s16 inst,
u16 rstctrl_offs)
{
u32 v;
v = omap4_prminst_read_inst_reg(part, inst, rstctrl_offs);
v &= 1 << shift;
v >>= shift;
return v;
}
/* Read-modify-write a register in PRM. Caller must lock */
u32 omap4_prminst_rmw_inst_reg_bits(u32 mask, u32 bits, u8 part, s16 inst,
u16 idx)
{
u32 v;
v = omap4_prminst_read_inst_reg(part, inst, idx);
v &= ~mask;
v |= bits;
omap4_prminst_write_inst_reg(v, part, inst, idx);
return v;
}
static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
{
u32 m, v;
m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
OMAP4_PM_PWSTCTRL);
v &= m;
v >>= __ffs(m);
return v;
}
/**
* omap4_device_read_next_state_off - read device off state
*
* Checks if device off is enabled or not.
* Returns true if enabled, false otherwise.
*/
static bool omap4_device_read_next_state_off(void)
{
u32 val;
u16 offset, inst, partition;
if (cpu_is_omap44xx()) {
partition = OMAP4430_PRM_PARTITION;
offset = OMAP4_PRM_DEVICE_OFF_CTRL_OFFSET;
inst = OMAP4430_PRM_DEVICE_INST;
} else {
return false;
}
val = omap4_prminst_read_inst_reg(partition,
inst, offset);
val &= OMAP4430_DEVICE_OFF_ENABLE_MASK;
return val ? true : false;
}
/**
* omap4_pwrdm_lost_context_rff - check if a pwrdm has lost it rff context
* @pwrdm: struct powerdomain * to check
*
* Checks if the powerdomain has lost its RFF context or not. Basically
* this means if the device has entered off or not. Returns true if the
* context has been lost, false otherwise.
*/
static bool omap4_pwrdm_lost_context_rff(struct powerdomain *pwrdm)
{
u32 val;
s16 inst, offset;
if (!pwrdm)
return false;
inst = pwrdm->prcm_offs;
offset = pwrdm->context_offs;
if (!offset)
return false;
val = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, inst, offset);
if (val & OMAP4430_LOSTCONTEXT_RFF_MASK)
return true;
return false;
}
static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
{
u32 c = 0;
while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,
pwrdm->prcm_offs,
OMAP4_PM_PWSTST) &
OMAP_INTRANSITION_MASK) &&
(c++ < PWRDM_TRANSITION_BAILOUT))
udelay(1);
if (c > PWRDM_TRANSITION_BAILOUT) {
printk(KERN_ERR "powerdomain: waited too long for "
"powerdomain %s to complete transition\n", pwrdm->name);
return -EAGAIN;
}
pr_debug("powerdomain: completed transition in %d loops\n", c);
return 0;
}
static int __init resetreason_init(void)
{
int i;
u32 reasons =
omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST,
OMAP4_PRM_RSTST_OFFSET);
memset(resetreason, 0, RESET_REASON_SIZE);
for (i = 0; i < ARRAY_SIZE(resetreason_flags); i++)
if (reasons & resetreason_flags[i].mask)
strlcat(resetreason, resetreason_flags[i].str,
sizeof(resetreason));
strlcat(resetreason, "Reset", sizeof(resetreason));
pr_info("Last OMAP reset reason was %s (PRM_RSTST=0x%x)\n", resetreason, reasons);
omap4_prminst_write_inst_reg(reasons, OMAP4430_PRM_PARTITION,
OMAP4430_PRM_DEVICE_INST, OMAP4_PRM_RSTST_OFFSET);
return 0;
}
static u32 omap4_voltage_read_reg(u16 mod, u8 offset)
{
return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
mod, offset);
}