ARM: OMAP2: Powerdomain: Add OMAP2/3 common powerdomains

Add powerdomains common to both OMAP2 and OMAP3 (WKUP and GFX/SGX).
Modify mach-omap2/io.c to initialize the powerdomain code on boot.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

3 files changed, 154 insertions, 1 deletions

diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 987351f07d7b..5f73cf0bb7ef 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -24,6 +24,10 @@
 #include <mach/mux.h>
 #include <mach/omapfb.h>
 
+#include <mach/powerdomain.h>
+
+#include "powerdomains.h"
+
 extern void omap_sram_init(void);
 extern int omap2_clk_init(void);
 extern void omap2_check_revision(void);
@@ -101,6 +105,7 @@ void __init omap2_map_common_io(void)
 void __init omap2_init_common_hw(void)
 {
         omap2_mux_init();
+        pwrdm_init(powerdomains_omap);
         omap2_clk_init();
 /*
  * Need to Fix this for 2430
diff --git a/arch/arm/mach-omap2/powerdomains.h b/arch/arm/mach-omap2/powerdomains.h
new file mode 100644
index 000000000000..1936df23559a
--- /dev/null
+++ b/arch/arm/mach-omap2/powerdomains.h
@@ -0,0 +1,147 @@
+/*
+ * OMAP2/3 common powerdomain definitions
+ *
+ * Copyright (C) 2007-8 Texas Instruments, Inc.
+ * Copyright (C) 2007-8 Nokia Corporation
+ *
+ * Written by Paul Walmsley
+ * Debugging and integration fixes by Jouni Högander
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef ARCH_ARM_MACH_OMAP2_POWERDOMAINS
+#define ARCH_ARM_MACH_OMAP2_POWERDOMAINS
+
+/*
+ * This file contains all of the powerdomains that have some element
+ * of software control for the OMAP24xx and OMAP34XX chips.
+ *
+ * A few notes:
+ *
+ * This is not an exhaustive listing of powerdomains on the chips; only
+ * powerdomains that can be controlled in software.
+ *
+ * A useful validation rule for struct powerdomain:
+ * Any powerdomain referenced by a wkdep_srcs or sleepdep_srcs array
+ * must have a dep_bit assigned.  So wkdep_srcs/sleepdep_srcs are really
+ * just software-controllable dependencies.  Non-software-controllable
+ * dependencies do exist, but they are not encoded below (yet).
+ *
+ * 24xx does not support programmable sleep dependencies (SLEEPDEP)
+ *
+ */
+
+/*
+ * The names for the DSP/IVA2 powerdomains are confusing.
+ *
+ * Most OMAP chips have an on-board DSP.
+ *
+ * On the 2420, this is a 'C55 DSP called, simply, the DSP.  Its
+ * powerdomain is called the "DSP power domain."  On the 2430, the
+ * on-board DSP is a 'C64 DSP, now called the IVA2 or IVA2.1.  Its
+ * powerdomain is still called the "DSP power domain."  On the 3430,
+ * the DSP is a 'C64 DSP like the 2430, also known as the IVA2; but
+ * its powerdomain is now called the "IVA2 power domain."
+ *
+ * The 2420 also has something called the IVA, which is a separate ARM
+ * core, and has nothing to do with the DSP/IVA2.
+ *
+ * Ideally the DSP/IVA2 could just be the same powerdomain, but the PRCM
+ * address offset is different between the C55 and C64 DSPs.
+ *
+ * The overly-specific dep_bit names are due to a bit name collision
+ * with CM_FCLKEN_{DSP,IVA2}.  The DSP/IVA2 PM_WKDEP and CM_SLEEPDEP shift
+ * value are the same for all powerdomains: 2
+ */
+
+/*
+ * XXX should dep_bit be a mask, so we can test to see if it is 0 as a
+ * sanity check?
+ * XXX encode hardware fixed wakeup dependencies -- esp. for 3430 CORE
+ */
+
+#include <mach/powerdomain.h>
+
+#include "prcm-common.h"
+#include "prm.h"
+#include "cm.h"
+
+/* OMAP2/3-common powerdomains and wakeup dependencies */
+
+/*
+ * 2420/2430 PM_WKDEP_GFX: CORE, MPU, WKUP
+ * 3430ES1 PM_WKDEP_GFX: adds IVA2, removes CORE
+ * 3430ES2 PM_WKDEP_SGX: adds IVA2, removes CORE
+ */
+static struct pwrdm_dep gfx_sgx_wkdeps[] = {
+        {
+                .pwrdm_name = "core_pwrdm",
+                .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP24XX)
+        },
+        {
+                .pwrdm_name = "iva2_pwrdm",
+                .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP3430)
+        },
+        {
+                .pwrdm_name = "mpu_pwrdm",
+                .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP24XX |
+                                            CHIP_IS_OMAP3430)
+        },
+        {
+                .pwrdm_name = "wkup_pwrdm",
+                .omap_chip = OMAP_CHIP_INIT(CHIP_IS_OMAP24XX |
+                                            CHIP_IS_OMAP3430)
+        },
+        { NULL },
+};
+
+/*
+ * OMAP2/3 common powerdomains
+ */
+
+/* XXX add sleepdeps for this powerdomain : 3430 */
+
+/*
+ * The GFX powerdomain is not present on 3430ES2, but currently we do not
+ * have a macro to filter it out at compile-time.
+ */
+static struct powerdomain gfx_pwrdm = {
+        .name             = "gfx_pwrdm",
+        .prcm_offs        = GFX_MOD,
+        .omap_chip        = OMAP_CHIP_INIT(CHIP_IS_OMAP24XX |
+                                           CHIP_IS_OMAP3430ES1),
+        .wkdep_srcs       = gfx_sgx_wkdeps,
+        .pwrsts           = PWRSTS_OFF_RET_ON,
+        .pwrsts_logic_ret = PWRDM_POWER_RET,
+        .banks            = 1,
+        .pwrsts_mem_ret   = {
+                [0] = PWRDM_POWER_RET, /* MEMRETSTATE */
+        },
+        .pwrsts_mem_on    = {
+                [0] = PWRDM_POWER_ON,  /* MEMONSTATE */
+        },
+};
+
+static struct powerdomain wkup_pwrdm = {
+        .name           = "wkup_pwrdm",
+        .prcm_offs      = WKUP_MOD,
+        .omap_chip      = OMAP_CHIP_INIT(CHIP_IS_OMAP24XX | CHIP_IS_OMAP3430),
+        .dep_bit        = OMAP_EN_WKUP_SHIFT,
+};
+
+
+
+/* As powerdomains are added or removed above, this list must also be changed */
+static struct powerdomain *powerdomains_omap[] __initdata = {
+
+        &gfx_pwrdm,
+        &wkup_pwrdm,
+
+        NULL
+};
+
+
+#endif
diff --git a/arch/arm/mach-omap2/prm.h b/arch/arm/mach-omap2/prm.h
index bbf41fc8e9a9..eb9982fb21d5 100644
--- a/arch/arm/mach-omap2/prm.h
+++ b/arch/arm/mach-omap2/prm.h
@@ -305,7 +305,8 @@ static inline u32 prm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
  * 3430: PM_WKDEP_IVA2, PM_WKDEP_GFX, PM_WKDEP_DSS, PM_WKDEP_CAM,
  *       PM_WKDEP_PER
  */
-#define OMAP_EN_WKUP                                    (1 << 4)
+#define OMAP_EN_WKUP_SHIFT                              4
+#define OMAP_EN_WKUP_MASK                               (1 << 4)
 
 /*
  * 24XX: PM_PWSTCTRL_MPU, PM_PWSTCTRL_CORE, PM_PWSTCTRL_GFX,