1 files changed, 182 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/powerdomain.h b/arch/arm/plat-omap/include/plat/powerdomain.h
new file mode 100644
index 000000000000..3d45ee1d3cf4
--- /dev/null
+++ b/arch/arm/plat-omap/include/plat/powerdomain.h
@@ -0,0 +1,182 @@
+/*
+ * OMAP2/3 powerdomain control
+ *
+ * Copyright (C) 2007-8 Texas Instruments, Inc.
+ * Copyright (C) 2007-8 Nokia Corporation
+ *
+ * Written by Paul Walmsley
+ *
+ * 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 ASM_ARM_ARCH_OMAP_POWERDOMAIN
+#define ASM_ARM_ARCH_OMAP_POWERDOMAIN
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+#include <asm/atomic.h>
+
+#include <plat/cpu.h>
+
+
+/* Powerdomain basic power states */
+#define PWRDM_POWER_OFF         0x0
+#define PWRDM_POWER_RET         0x1
+#define PWRDM_POWER_INACTIVE    0x2
+#define PWRDM_POWER_ON          0x3
+
+/* Powerdomain allowable state bitfields */
+#define PWRSTS_OFF_ON           ((1 << PWRDM_POWER_OFF) | \
+                                 (1 << PWRDM_POWER_ON))
+
+#define PWRSTS_OFF_RET          ((1 << PWRDM_POWER_OFF) | \
+                                 (1 << PWRDM_POWER_RET))
+
+#define PWRSTS_OFF_RET_ON       (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON))
+
+
+/* Powerdomain flags */
+#define PWRDM_HAS_HDWR_SAR      (1 << 0) /* hardware save-and-restore support */
+
+
+/*
+ * Number of memory banks that are power-controllable.  On OMAP3430, the
+ * maximum is 4.
+ */
+#define PWRDM_MAX_MEM_BANKS     4
+
+/*
+ * Maximum number of clockdomains that can be associated with a powerdomain.
+ * CORE powerdomain on OMAP3 is the worst case
+ */
+#define PWRDM_MAX_CLKDMS        4
+
+/* XXX A completely arbitrary number. What is reasonable here? */
+#define PWRDM_TRANSITION_BAILOUT 100000
+
+struct clockdomain;
+struct powerdomain;
+
+/* Encodes dependencies between powerdomains - statically defined */
+struct pwrdm_dep {
+
+        /* Powerdomain name */
+        const char *pwrdm_name;
+
+        /* Powerdomain pointer - resolved by the powerdomain code */
+        struct powerdomain *pwrdm;
+
+        /* Flags to mark OMAP chip restrictions, etc. */
+        const struct omap_chip_id omap_chip;
+
+};
+
+struct powerdomain {
+
+        /* Powerdomain name */
+        const char *name;
+
+        /* the address offset from CM_BASE/PRM_BASE */
+        const s16 prcm_offs;
+
+        /* Used to represent the OMAP chip types containing this pwrdm */
+        const struct omap_chip_id omap_chip;
+
+        /* Bit shift of this powerdomain's PM_WKDEP/CM_SLEEPDEP bit */
+        const u8 dep_bit;
+
+        /* Powerdomains that can be told to wake this powerdomain up */
+        struct pwrdm_dep *wkdep_srcs;
+
+        /* Powerdomains that can be told to keep this pwrdm from inactivity */
+        struct pwrdm_dep *sleepdep_srcs;
+
+        /* Possible powerdomain power states */
+        const u8 pwrsts;
+
+        /* Possible logic power states when pwrdm in RETENTION */
+        const u8 pwrsts_logic_ret;
+
+        /* Powerdomain flags */
+        const u8 flags;
+
+        /* Number of software-controllable memory banks in this powerdomain */
+        const u8 banks;
+
+        /* Possible memory bank pwrstates when pwrdm in RETENTION */
+        const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS];
+
+        /* Possible memory bank pwrstates when pwrdm is ON */
+        const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
+
+        /* Clockdomains in this powerdomain */
+        struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
+
+        struct list_head node;
+
+        int state;
+        unsigned state_counter[4];
+
+#ifdef CONFIG_PM_DEBUG
+        s64 timer;
+        s64 state_timer[4];
+#endif
+};
+
+
+void pwrdm_init(struct powerdomain **pwrdm_list);
+
+int pwrdm_register(struct powerdomain *pwrdm);
+int pwrdm_unregister(struct powerdomain *pwrdm);
+struct powerdomain *pwrdm_lookup(const char *name);
+
+int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
+                        void *user);
+int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user),
+                        void *user);
+
+int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
+int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
+int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
+                         int (*fn)(struct powerdomain *pwrdm,
+                                   struct clockdomain *clkdm));
+
+int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
+
+int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
+
+int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
+int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm);
+int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm);
+
+int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
+int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst);
+
+int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm);
+int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
+int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
+
+int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
+int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
+bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
+
+int pwrdm_wait_transition(struct powerdomain *pwrdm);
+
+int pwrdm_state_switch(struct powerdomain *pwrdm);
+int pwrdm_clkdm_state_switch(struct clockdomain *clkdm);
+int pwrdm_pre_transition(void);
+int pwrdm_post_transition(void);
+
+#endif