OMAP: powerdomain: Arch specific funcs for mem control

Define the following architecture specific funtions for omap2/3/4
.pwrdm_set_mem_onst
.pwrdm_set_mem_retst
.pwrdm_read_mem_pwrst
.pwrdm_read_prev_mem_pwrst
.pwrdm_read_mem_retst
.pwrdm_clear_all_prev_pwrst
.pwrdm_enable_hdwr_sar
.pwrdm_disable_hdwr_sar
.pwrdm_wait_transition
.pwrdm_set_lowpwrstchange

Convert the platform-independent framework to call these functions.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: rearranged Makefile changes]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Kevin Hilman <khilman@deeprootsystems.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 131 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c
index b7ea191539e5..6cdf67860cb3 100644
--- a/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c
+++ b/arch/arm/mach-omap2/powerdomain2xxx_3xxx.c
@@ -41,6 +41,50 @@ static int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm)
                                 OMAP2_PM_PWSTST, OMAP_POWERSTATEST_MASK);
 }
 
+static int omap2_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
+                                                                u8 pwrst)
+{
+        u32 m;
+
+        m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);
+
+        prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
+                                OMAP2_PM_PWSTCTRL);
+
+        return 0;
+}
+
+static int omap2_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
+                                                                u8 pwrst)
+{
+        u32 m;
+
+        m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
+
+        prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,
+                                OMAP2_PM_PWSTCTRL);
+
+        return 0;
+}
+
+static int omap2_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+        u32 m;
+
+        m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
+
+        return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST, m);
+}
+
+static int omap2_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
+{
+        u32 m;
+
+        m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
+
+        return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL, m);
+}
+
 static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
 {
         u32 v;
@@ -52,6 +96,33 @@ static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
         return 0;
 }
 
+static int omap2_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 ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP2_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;
+}
+
 /* Applicable only for OMAP3. Not supported on OMAP2 */
 static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
 {
@@ -77,11 +148,62 @@ static int omap3_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
                                 OMAP3430_LASTLOGICSTATEENTERED_MASK);
 }
 
+static int omap3_get_mem_bank_lastmemst_mask(u8 bank)
+{
+        switch (bank) {
+        case 0:
+                return OMAP3430_LASTMEM1STATEENTERED_MASK;
+        case 1:
+                return OMAP3430_LASTMEM2STATEENTERED_MASK;
+        case 2:
+                return OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK;
+        case 3:
+                return OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK;
+        default:
+                WARN_ON(1); /* should never happen */
+                return -EEXIST;
+        }
+        return 0;
+}
+
+static int omap3_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
+{
+        u32 m;
+
+        m = omap3_get_mem_bank_lastmemst_mask(bank);
+
+        return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+                                OMAP3430_PM_PREPWSTST, m);
+}
+
+static int omap3_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
+{
+        prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST);
+        return 0;
+}
+
+static int omap3_pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
+{
+        return prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,
+                                pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+}
+
+static int omap3_pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
+{
+        return prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0,
+                                pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);
+}
+
 struct pwrdm_ops omap2_pwrdm_operations = {
         .pwrdm_set_next_pwrst   = omap2_pwrdm_set_next_pwrst,
         .pwrdm_read_next_pwrst  = omap2_pwrdm_read_next_pwrst,
         .pwrdm_read_pwrst       = omap2_pwrdm_read_pwrst,
         .pwrdm_set_logic_retst  = omap2_pwrdm_set_logic_retst,
+        .pwrdm_set_mem_onst     = omap2_pwrdm_set_mem_onst,
+        .pwrdm_set_mem_retst    = omap2_pwrdm_set_mem_retst,
+        .pwrdm_read_mem_pwrst   = omap2_pwrdm_read_mem_pwrst,
+        .pwrdm_read_mem_retst   = omap2_pwrdm_read_mem_retst,
+        .pwrdm_wait_transition  = omap2_pwrdm_wait_transition,
 };
 
 struct pwrdm_ops omap3_pwrdm_operations = {
@@ -93,4 +215,13 @@ struct pwrdm_ops omap3_pwrdm_operations = {
         .pwrdm_read_logic_pwrst = omap3_pwrdm_read_logic_pwrst,
         .pwrdm_read_logic_retst = omap3_pwrdm_read_logic_retst,
         .pwrdm_read_prev_logic_pwrst    = omap3_pwrdm_read_prev_logic_pwrst,
+        .pwrdm_set_mem_onst     = omap2_pwrdm_set_mem_onst,
+        .pwrdm_set_mem_retst    = omap2_pwrdm_set_mem_retst,
+        .pwrdm_read_mem_pwrst   = omap2_pwrdm_read_mem_pwrst,
+        .pwrdm_read_mem_retst   = omap2_pwrdm_read_mem_retst,
+        .pwrdm_read_prev_mem_pwrst      = omap3_pwrdm_read_prev_mem_pwrst,
+        .pwrdm_clear_all_prev_pwrst     = omap3_pwrdm_clear_all_prev_pwrst,
+        .pwrdm_enable_hdwr_sar  = omap3_pwrdm_enable_hdwr_sar,
+        .pwrdm_disable_hdwr_sar = omap3_pwrdm_disable_hdwr_sar,
+        .pwrdm_wait_transition  = omap2_pwrdm_wait_transition,
 };