OMAP3: PM: Add D2D clocks and auto-idle setup to PRCM init

Add D2D clocks (modem_fck, sad2d_ick, mad2d_ick) to clock framework
and ensure that auto-idle bits are set for these clocks during PRCM
init.

Also add omap3_d2d_idle() function called durint PRCM setup which
ensures D2D pins are MUX'd correctly to enable retention for
standalone (no-modem) devices.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

5 files changed, 75 insertions, 4 deletions

diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c
index 62021397e5f9..9e43fe5209d3 100644
--- a/arch/arm/mach-omap2/clock34xx.c
+++ b/arch/arm/mach-omap2/clock34xx.c
@@ -129,6 +129,9 @@ static struct omap_clk omap34xx_clks[] = {
         CLK(NULL,       "sgx_fck",      &sgx_fck,       CK_3430ES2),
         CLK(NULL,       "sgx_ick",      &sgx_ick,       CK_3430ES2),
         CLK(NULL,       "d2d_26m_fck",  &d2d_26m_fck,   CK_3430ES1),
+        CLK(NULL,       "modem_fck",    &modem_fck,     CK_343X),
+        CLK(NULL,       "sad2d_ick",    &sad2d_ick,     CK_343X),
+        CLK(NULL,       "mad2d_ick",    &mad2d_ick,     CK_343X),
         CLK(NULL,       "gpt10_fck",    &gpt10_fck,     CK_343X),
         CLK(NULL,       "gpt11_fck",    &gpt11_fck,     CK_343X),
         CLK(NULL,       "cpefuse_fck",  &cpefuse_fck,   CK_3430ES2),
diff --git a/arch/arm/mach-omap2/clock34xx.h b/arch/arm/mach-omap2/clock34xx.h
index 496f0e9caeb2..e433aec4efdd 100644
--- a/arch/arm/mach-omap2/clock34xx.h
+++ b/arch/arm/mach-omap2/clock34xx.h
@@ -1230,6 +1230,37 @@ static struct clk d2d_26m_fck = {
         .recalc         = &followparent_recalc,
 };
 
+static struct clk modem_fck = {
+        .name           = "modem_fck",
+        .ops            = &clkops_omap2_dflt_wait,
+        .parent         = &sys_ck,
+        .init           = &omap2_init_clk_clkdm,
+        .enable_reg     = OMAP_CM_REGADDR(CORE_MOD, CM_FCLKEN1),
+        .enable_bit     = OMAP3430_EN_MODEM_SHIFT,
+        .clkdm_name     = "d2d_clkdm",
+        .recalc         = &followparent_recalc,
+};
+
+static struct clk sad2d_ick = {
+        .name           = "sad2d_ick",
+        .ops            = &clkops_omap2_dflt_wait,
+        .parent         = &l3_ick,
+        .enable_reg     = OMAP_CM_REGADDR(CORE_MOD, CM_ICLKEN1),
+        .enable_bit     = OMAP3430_EN_SAD2D_SHIFT,
+        .clkdm_name     = "d2d_clkdm",
+        .recalc         = &followparent_recalc,
+};
+
+static struct clk mad2d_ick = {
+        .name           = "mad2d_ick",
+        .ops            = &clkops_omap2_dflt_wait,
+        .parent         = &l3_ick,
+        .enable_reg     = OMAP_CM_REGADDR(CORE_MOD, CM_ICLKEN3),
+        .enable_bit     = OMAP3430_EN_MAD2D_SHIFT,
+        .clkdm_name     = "d2d_clkdm",
+        .recalc         = &followparent_recalc,
+};
+
 static const struct clksel omap343x_gpt_clksel[] = {
         { .parent = &omap_32k_fck, .rates = gpt_32k_rates },
         { .parent = &sys_ck,       .rates = gpt_sys_rates },
@@ -1947,8 +1978,6 @@ static struct clk usb_l4_ick = {
         .recalc         = &omap2_clksel_recalc,
 };
 
-/* XXX MDM_INTC_ICK, SAD2D_ICK ?? */
-
 /* SECURITY_L4_ICK2 based clocks */
 
 static struct clk security_l4_ick2 = {
diff --git a/arch/arm/mach-omap2/cm-regbits-34xx.h b/arch/arm/mach-omap2/cm-regbits-34xx.h
index 6f3f5a36aae6..6923deb98a28 100644
--- a/arch/arm/mach-omap2/cm-regbits-34xx.h
+++ b/arch/arm/mach-omap2/cm-regbits-34xx.h
@@ -145,6 +145,8 @@
 #define OMAP3430_CLKACTIVITY_MPU_MASK                   (1 << 0)
 
 /* CM_FCLKEN1_CORE specific bits */
+#define OMAP3430_EN_MODEM                               (1 << 31)
+#define OMAP3430_EN_MODEM_SHIFT                         31
 
 /* CM_ICLKEN1_CORE specific bits */
 #define OMAP3430_EN_ICR                                 (1 << 29)
@@ -161,6 +163,8 @@
 #define OMAP3430_EN_MAILBOXES_SHIFT                     7
 #define OMAP3430_EN_OMAPCTRL                            (1 << 6)
 #define OMAP3430_EN_OMAPCTRL_SHIFT                      6
+#define OMAP3430_EN_SAD2D                               (1 << 3)
+#define OMAP3430_EN_SAD2D_SHIFT                         3
 #define OMAP3430_EN_SDRC                                (1 << 1)
 #define OMAP3430_EN_SDRC_SHIFT                          1
 
@@ -176,6 +180,10 @@
 #define OMAP3430_EN_DES1                                (1 << 0)
 #define OMAP3430_EN_DES1_SHIFT                          0
 
+/* CM_ICLKEN3_CORE */
+#define OMAP3430_EN_MAD2D_SHIFT                         3
+#define OMAP3430_EN_MAD2D                               (1 << 3)
+
 /* CM_FCLKEN3_CORE specific bits */
 #define OMAP3430ES2_EN_TS_SHIFT                         1
 #define OMAP3430ES2_EN_TS_MASK                          (1 << 1)
@@ -231,6 +239,8 @@
 #define OMAP3430ES2_ST_CPEFUSE_MASK                     (1 << 0)
 
 /* CM_AUTOIDLE1_CORE */
+#define OMAP3430_AUTO_MODEM                             (1 << 31)
+#define OMAP3430_AUTO_MODEM_SHIFT                       31
 #define OMAP3430ES2_AUTO_MMC3                           (1 << 30)
 #define OMAP3430ES2_AUTO_MMC3_SHIFT                     30
 #define OMAP3430ES2_AUTO_ICR                            (1 << 29)
@@ -287,6 +297,8 @@
 #define OMAP3430_AUTO_HSOTGUSB_SHIFT                    4
 #define OMAP3430ES1_AUTO_D2D                            (1 << 3)
 #define OMAP3430ES1_AUTO_D2D_SHIFT                      3
+#define OMAP3430_AUTO_SAD2D                             (1 << 3)
+#define OMAP3430_AUTO_SAD2D_SHIFT                       3
 #define OMAP3430_AUTO_SSI                               (1 << 0)
 #define OMAP3430_AUTO_SSI_SHIFT                         0
 
@@ -308,6 +320,8 @@
 #define OMAP3430ES2_AUTO_USBTLL                         (1 << 2)
 #define OMAP3430ES2_AUTO_USBTLL_SHIFT                   2
 #define OMAP3430ES2_AUTO_USBTLL_MASK                    (1 << 2)
+#define OMAP3430_AUTO_MAD2D_SHIFT                       3
+#define OMAP3430_AUTO_MAD2D                             (1 << 3)
 
 /* CM_CLKSEL_CORE */
 #define OMAP3430_CLKSEL_SSI_SHIFT                       8
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 54876aca2d45..f72e25465429 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -415,14 +415,32 @@ static void __init omap3_iva_idle(void)
                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 }
 
-static void __init prcm_setup_regs(void)
+static void __init omap3_d2d_idle(void)
 {
+        u16 mask, padconf;
+
+        /* In a stand alone OMAP3430 where there is not a stacked
+         * modem for the D2D Idle Ack and D2D MStandby must be pulled
+         * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
+         * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. */
+        mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
+        padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
+        padconf |= mask;
+        omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
+
+        padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
+        padconf |= mask;
+        omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
+
         /* reset modem */
         prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
                           OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
                           CORE_MOD, RM_RSTCTRL);
         prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
+}
 
+static void __init prcm_setup_regs(void)
+{
         /* XXX Reset all wkdeps. This should be done when initializing
          * powerdomains */
         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
@@ -442,6 +460,7 @@ static void __init prcm_setup_regs(void)
          * Note that in the long run this should be done by clockfw
          */
         cm_write_mod_reg(
+                OMAP3430_AUTO_MODEM |
                 OMAP3430ES2_AUTO_MMC3 |
                 OMAP3430ES2_AUTO_ICR |
                 OMAP3430_AUTO_AES2 |
@@ -469,7 +488,7 @@ static void __init prcm_setup_regs(void)
                 OMAP3430_AUTO_OMAPCTRL |
                 OMAP3430ES1_AUTO_FSHOSTUSB |
                 OMAP3430_AUTO_HSOTGUSB |
-                OMAP3430ES1_AUTO_D2D | /* This is es1 only */
+                OMAP3430_AUTO_SAD2D |
                 OMAP3430_AUTO_SSI,
                 CORE_MOD, CM_AUTOIDLE1);
 
@@ -483,6 +502,7 @@ static void __init prcm_setup_regs(void)
 
         if (omap_rev() > OMAP3430_REV_ES1_0) {
                 cm_write_mod_reg(
+                        OMAP3430_AUTO_MAD2D |
                         OMAP3430ES2_AUTO_USBTLL,
                         CORE_MOD, CM_AUTOIDLE3);
         }
@@ -576,6 +596,7 @@ static void __init prcm_setup_regs(void)
                           OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
 
         omap3_iva_idle();
+        omap3_d2d_idle();
 }
 
 static int __init pwrdms_setup(struct powerdomain *pwrdm)
diff --git a/arch/arm/plat-omap/include/mach/control.h b/arch/arm/plat-omap/include/mach/control.h
index a9f05e5bb2ba..fcc5a9b76973 100644
--- a/arch/arm/plat-omap/include/mach/control.h
+++ b/arch/arm/plat-omap/include/mach/control.h
@@ -144,6 +144,10 @@
 #define OMAP343X_CONTROL_PBIAS_LITE     (OMAP2_CONTROL_GENERAL + 0x02b0)
 #define OMAP343X_CONTROL_TEMP_SENSOR    (OMAP2_CONTROL_GENERAL + 0x02b4)
 
+/* 34xx D2D idle-related pins, handled by PM core */
+#define OMAP3_PADCONF_SAD2D_MSTANDBY   0x250
+#define OMAP3_PADCONF_SAD2D_IDLEACK    0x254
+
 /*
  * REVISIT: This list of registers is not comprehensive - there are more
  * that should be added.