diff options
Diffstat (limited to 'arch/arm/mach-omap2/prm33xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/prm33xx.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/prm33xx.c b/arch/arm/mach-omap2/prm33xx.c index 0d8abb57766..1ac73883f89 100644 --- a/arch/arm/mach-omap2/prm33xx.c +++ b/arch/arm/mach-omap2/prm33xx.c @@ -20,6 +20,7 @@ #include <linux/io.h> #include "common.h" +#include "powerdomain.h" #include "prm33xx.h" #include "prm-regbits-33xx.h" @@ -131,3 +132,204 @@ int am33xx_prm_deassert_hardreset(u8 shift, s16 inst, return (c == MAX_MODULE_HARDRESET_WAIT) ? -EBUSY : 0; } + +static int am33xx_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) +{ + am33xx_prm_rmw_reg_bits(OMAP_POWERSTATE_MASK, + (pwrst << OMAP_POWERSTATE_SHIFT), + pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + return 0; +} + +static int am33xx_pwrdm_read_next_pwrst(struct powerdomain *pwrdm) +{ + u32 v; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + v &= OMAP_POWERSTATE_MASK; + v >>= OMAP_POWERSTATE_SHIFT; + + return v; +} + +static int am33xx_pwrdm_read_pwrst(struct powerdomain *pwrdm) +{ + u32 v; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs); + v &= OMAP_POWERSTATEST_MASK; + v >>= OMAP_POWERSTATEST_SHIFT; + + return v; +} + +static int am33xx_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) +{ + u32 v; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs); + v &= AM33XX_LASTPOWERSTATEENTERED_MASK; + v >>= AM33XX_LASTPOWERSTATEENTERED_SHIFT; + + return v; +} + +static int am33xx_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) +{ + am33xx_prm_rmw_reg_bits(AM33XX_LOWPOWERSTATECHANGE_MASK, + (1 << AM33XX_LOWPOWERSTATECHANGE_SHIFT), + pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + return 0; +} + +static int am33xx_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) +{ + am33xx_prm_rmw_reg_bits(AM33XX_LASTPOWERSTATEENTERED_MASK, + AM33XX_LASTPOWERSTATEENTERED_MASK, + pwrdm->prcm_offs, pwrdm->pwrstst_offs); + return 0; +} + +static int am33xx_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) +{ + u32 m; + + m = pwrdm->logicretstate_mask; + if (!m) + return -EINVAL; + + am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)), + pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + + return 0; +} + +static int am33xx_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm) +{ + u32 v; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs); + v &= AM33XX_LOGICSTATEST_MASK; + v >>= AM33XX_LOGICSTATEST_SHIFT; + + return v; +} + +static int am33xx_pwrdm_read_logic_retst(struct powerdomain *pwrdm) +{ + u32 v, m; + + m = pwrdm->logicretstate_mask; + if (!m) + return -EINVAL; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + v &= m; + v >>= __ffs(m); + + return v; +} + +static int am33xx_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = pwrdm->mem_on_mask[bank]; + if (!m) + return -EINVAL; + + am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)), + pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + + return 0; +} + +static int am33xx_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, + u8 pwrst) +{ + u32 m; + + m = pwrdm->mem_ret_mask[bank]; + if (!m) + return -EINVAL; + + am33xx_prm_rmw_reg_bits(m, (pwrst << __ffs(m)), + pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + + return 0; +} + +static int am33xx_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m, v; + + m = pwrdm->mem_pwrst_mask[bank]; + if (!m) + return -EINVAL; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs); + v &= m; + v >>= __ffs(m); + + return v; +} + +static int am33xx_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) +{ + u32 m, v; + + m = pwrdm->mem_retst_mask[bank]; + if (!m) + return -EINVAL; + + v = am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstctrl_offs); + v &= m; + v >>= __ffs(m); + + return v; +} + +static int am33xx_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 ((am33xx_prm_read_reg(pwrdm->prcm_offs, pwrdm->pwrstst_offs) + & OMAP_INTRANSITION_MASK) && + (c++ < PWRDM_TRANSITION_BAILOUT)) + udelay(1); + + if (c > PWRDM_TRANSITION_BAILOUT) { + pr_err("powerdomain: %s: waited too long to complete transition\n", + pwrdm->name); + return -EAGAIN; + } + + pr_debug("powerdomain: completed transition in %d loops\n", c); + + return 0; +} + +struct pwrdm_ops am33xx_pwrdm_operations = { + .pwrdm_set_next_pwrst = am33xx_pwrdm_set_next_pwrst, + .pwrdm_read_next_pwrst = am33xx_pwrdm_read_next_pwrst, + .pwrdm_read_pwrst = am33xx_pwrdm_read_pwrst, + .pwrdm_read_prev_pwrst = am33xx_pwrdm_read_prev_pwrst, + .pwrdm_set_logic_retst = am33xx_pwrdm_set_logic_retst, + .pwrdm_read_logic_pwrst = am33xx_pwrdm_read_logic_pwrst, + .pwrdm_read_logic_retst = am33xx_pwrdm_read_logic_retst, + .pwrdm_clear_all_prev_pwrst = am33xx_pwrdm_clear_all_prev_pwrst, + .pwrdm_set_lowpwrstchange = am33xx_pwrdm_set_lowpwrstchange, + .pwrdm_read_mem_pwrst = am33xx_pwrdm_read_mem_pwrst, + .pwrdm_read_mem_retst = am33xx_pwrdm_read_mem_retst, + .pwrdm_set_mem_onst = am33xx_pwrdm_set_mem_onst, + .pwrdm_set_mem_retst = am33xx_pwrdm_set_mem_retst, + .pwrdm_wait_transition = am33xx_pwrdm_wait_transition, +}; |