--- /dev/null
+/*
+ * omap_hwmod implementation for OMAP2/3/4
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ * With fixes and testing from Kevin Hilman
+ *
+ * Created in collaboration with (alphabetical order): Benoit Cousson,
+ * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
+ * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
+ *
+ * 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.
+ *
+ * This code manages "OMAP modules" (on-chip devices) and their
+ * integration with Linux device driver and bus code.
+ *
+ * References:
+ * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
+ * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
+ * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
+ * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
+ * - Open Core Protocol Specification 2.2
+ *
+ * To do:
+ * - pin mux handling
+ * - handle IO mapping
+ * - bus throughput & module latency measurement code
+ *
+ * XXX add tests at the beginning of each function to ensure the hwmod is
+ * in the appropriate state
+ * XXX error return values should be checked to ensure that they are
+ * appropriate
+ */
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/bootmem.h>
+
+#include <mach/cpu.h>
+#include <mach/clockdomain.h>
+#include <mach/powerdomain.h>
+#include <mach/clock.h>
+#include <mach/omap_hwmod.h>
+
+#include "cm.h"
+
+/* Maximum microseconds to wait for OMAP module to reset */
+#define MAX_MODULE_RESET_WAIT 10000
+
+/* Name of the OMAP hwmod for the MPU */
+#define MPU_INITIATOR_NAME "mpu_hwmod"
+
+/* omap_hwmod_list contains all registered struct omap_hwmods */
+static LIST_HEAD(omap_hwmod_list);
+
+static DEFINE_MUTEX(omap_hwmod_mutex);
+
+/* mpu_oh: used to add/remove MPU initiator from sleepdep list */
+static struct omap_hwmod *mpu_oh;
+
+/* inited: 0 if omap_hwmod_init() has not yet been called; 1 otherwise */
+static u8 inited;
+
+
+/* Private functions */
+
+/**
+ * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
+ * @oh: struct omap_hwmod *
+ *
+ * Load the current value of the hwmod OCP_SYSCONFIG register into the
+ * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
+ * OCP_SYSCONFIG register or 0 upon success.
+ */
+static int _update_sysc_cache(struct omap_hwmod *oh)
+{
+ if (!oh->sysconfig) {
+ WARN(!oh->sysconfig, "omap_hwmod: %s: cannot read "
+ "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
+ return -EINVAL;
+ }
+
+ /* XXX ensure module interface clock is up */
+
+ oh->_sysc_cache = omap_hwmod_readl(oh, oh->sysconfig->sysc_offs);
+
+ oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED;
+
+ return 0;
+}
+
+/**
+ * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
+ * @v: OCP_SYSCONFIG value to write
+ * @oh: struct omap_hwmod *
+ *
+ * Write @v into the module OCP_SYSCONFIG register, if it has one. No
+ * return value.
+ */
+static void _write_sysconfig(u32 v, struct omap_hwmod *oh)
+{
+ if (!oh->sysconfig) {
+ WARN(!oh->sysconfig, "omap_hwmod: %s: cannot write "
+ "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
+ return;
+ }
+
+ /* XXX ensure module interface clock is up */
+
+ if (oh->_sysc_cache != v) {
+ oh->_sysc_cache = v;
+ omap_hwmod_writel(v, oh, oh->sysconfig->sysc_offs);
+ }
+}
+
+/**
+ * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
+ * @oh: struct omap_hwmod *
+ * @standbymode: MIDLEMODE field bits
+ * @v: pointer to register contents to modify
+ *
+ * Update the master standby mode bits in @v to be @standbymode for
+ * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
+ * upon error or 0 upon success.
+ */
+static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode,
+ u32 *v)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE))
+ return -EINVAL;
+
+ *v &= ~SYSC_MIDLEMODE_MASK;
+ *v |= __ffs(standbymode) << SYSC_MIDLEMODE_SHIFT;
+
+ return 0;
+}
+
+/**
+ * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
+ * @oh: struct omap_hwmod *
+ * @idlemode: SIDLEMODE field bits
+ * @v: pointer to register contents to modify
+ *
+ * Update the slave idle mode bits in @v to be @idlemode for the @oh
+ * hwmod. Does not write to the hardware. Returns -EINVAL upon error
+ * or 0 upon success.
+ */
+static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE))
+ return -EINVAL;
+
+ *v &= ~SYSC_SIDLEMODE_MASK;
+ *v |= __ffs(idlemode) << SYSC_SIDLEMODE_SHIFT;
+
+ return 0;
+}
+
+/**
+ * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
+ * @oh: struct omap_hwmod *
+ * @clockact: CLOCKACTIVITY field bits
+ * @v: pointer to register contents to modify
+ *
+ * Update the clockactivity mode bits in @v to be @clockact for the
+ * @oh hwmod. Used for additional powersaving on some modules. Does
+ * not write to the hardware. Returns -EINVAL upon error or 0 upon
+ * success.
+ */
+static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
+ return -EINVAL;
+
+ *v &= ~SYSC_CLOCKACTIVITY_MASK;
+ *v |= clockact << SYSC_CLOCKACTIVITY_SHIFT;
+
+ return 0;
+}
+
+/**
+ * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
+ * @oh: struct omap_hwmod *
+ * @v: pointer to register contents to modify
+ *
+ * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
+ * error or 0 upon success.
+ */
+static int _set_softreset(struct omap_hwmod *oh, u32 *v)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET))
+ return -EINVAL;
+
+ *v |= SYSC_SOFTRESET_MASK;
+
+ return 0;
+}
+
+/**
+ * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
+ * @oh: struct omap_hwmod *
+ *
+ * Allow the hardware module @oh to send wakeups. Returns -EINVAL
+ * upon error or 0 upon success.
+ */
+static int _enable_wakeup(struct omap_hwmod *oh)
+{
+ u32 v;
+
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
+ return -EINVAL;
+
+ v = oh->_sysc_cache;
+ v |= SYSC_ENAWAKEUP_MASK;
+ _write_sysconfig(v, oh);
+
+ /* XXX test pwrdm_get_wken for this hwmod's subsystem */
+
+ oh->_int_flags |= _HWMOD_WAKEUP_ENABLED;
+
+ return 0;
+}
+
+/**
+ * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
+ * @oh: struct omap_hwmod *
+ *
+ * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
+ * upon error or 0 upon success.
+ */
+static int _disable_wakeup(struct omap_hwmod *oh)
+{
+ u32 v;
+
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
+ return -EINVAL;
+
+ v = oh->_sysc_cache;
+ v &= ~SYSC_ENAWAKEUP_MASK;
+ _write_sysconfig(v, oh);
+
+ /* XXX test pwrdm_get_wken for this hwmod's subsystem */
+
+ oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED;
+
+ return 0;
+}
+
+/**
+ * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
+ * @oh: struct omap_hwmod *
+ *
+ * Prevent the hardware module @oh from entering idle while the
+ * hardare module initiator @init_oh is active. Useful when a module
+ * will be accessed by a particular initiator (e.g., if a module will
+ * be accessed by the IVA, there should be a sleepdep between the IVA
+ * initiator and the module). Only applies to modules in smart-idle
+ * mode. Returns -EINVAL upon error or passes along
+ * pwrdm_add_sleepdep() value upon success.
+ */
+static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
+{
+ if (!oh->_clk)
+ return -EINVAL;
+
+ return pwrdm_add_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
+ init_oh->_clk->clkdm->pwrdm.ptr);
+}
+
+/**
+ * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
+ * @oh: struct omap_hwmod *
+ *
+ * Allow the hardware module @oh to enter idle while the hardare
+ * module initiator @init_oh is active. Useful when a module will not
+ * be accessed by a particular initiator (e.g., if a module will not
+ * be accessed by the IVA, there should be no sleepdep between the IVA
+ * initiator and the module). Only applies to modules in smart-idle
+ * mode. Returns -EINVAL upon error or passes along
+ * pwrdm_add_sleepdep() value upon success.
+ */
+static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
+{
+ if (!oh->_clk)
+ return -EINVAL;
+
+ return pwrdm_del_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
+ init_oh->_clk->clkdm->pwrdm.ptr);
+}
+
+/**
+ * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
+ * @oh: struct omap_hwmod *
+ *
+ * Called from _init_clocks(). Populates the @oh _clk (main
+ * functional clock pointer) if a main_clk is present. Returns 0 on
+ * success or -EINVAL on error.
+ */
+static int _init_main_clk(struct omap_hwmod *oh)
+{
+ struct clk *c;
+ int ret = 0;
+
+ if (!oh->clkdev_con_id)
+ return 0;
+
+ c = clk_get_sys(oh->clkdev_dev_id, oh->clkdev_con_id);
+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get main_clk %s.%s\n",
+ oh->name, oh->clkdev_dev_id, oh->clkdev_con_id);
+ if (IS_ERR(c))
+ ret = -EINVAL;
+ oh->_clk = c;
+
+ return ret;
+}
+
+/**
+ * _init_interface_clk - get a struct clk * for the the hwmod's interface clks
+ * @oh: struct omap_hwmod *
+ *
+ * Called from _init_clocks(). Populates the @oh OCP slave interface
+ * clock pointers. Returns 0 on success or -EINVAL on error.
+ */
+static int _init_interface_clks(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ struct clk *c;
+ int i;
+ int ret = 0;
+
+ if (oh->slaves_cnt == 0)
+ return 0;
+
+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
+ if (!os->clkdev_con_id)
+ continue;
+
+ c = clk_get_sys(os->clkdev_dev_id, os->clkdev_con_id);
+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get "
+ "interface_clk %s.%s\n", oh->name,
+ os->clkdev_dev_id, os->clkdev_con_id);
+ if (IS_ERR(c))
+ ret = -EINVAL;
+ os->_clk = c;
+ }
+
+ return ret;
+}
+
+/**
+ * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
+ * @oh: struct omap_hwmod *
+ *
+ * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
+ * clock pointers. Returns 0 on success or -EINVAL on error.
+ */
+static int _init_opt_clks(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_opt_clk *oc;
+ struct clk *c;
+ int i;
+ int ret = 0;
+
+ for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) {
+ c = clk_get_sys(oc->clkdev_dev_id, oc->clkdev_con_id);
+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get opt_clk "
+ "%s.%s\n", oh->name, oc->clkdev_dev_id,
+ oc->clkdev_con_id);
+ if (IS_ERR(c))
+ ret = -EINVAL;
+ oc->_clk = c;
+ }
+
+ return ret;
+}
+
+/**
+ * _enable_clocks - enable hwmod main clock and interface clocks
+ * @oh: struct omap_hwmod *
+ *
+ * Enables all clocks necessary for register reads and writes to succeed
+ * on the hwmod @oh. Returns 0.
+ */
+static int _enable_clocks(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ int i;
+
+ pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
+
+ if (oh->_clk && !IS_ERR(oh->_clk))
+ clk_enable(oh->_clk);
+
+ if (oh->slaves_cnt > 0) {
+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
+ struct clk *c = os->_clk;
+
+ if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE))
+ clk_enable(c);
+ }
+ }
+
+ /* The opt clocks are controlled by the device driver. */
+
+ return 0;
+}
+
+/**
+ * _disable_clocks - disable hwmod main clock and interface clocks
+ * @oh: struct omap_hwmod *
+ *
+ * Disables the hwmod @oh main functional and interface clocks. Returns 0.
+ */
+static int _disable_clocks(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ int i;
+
+ pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name);
+
+ if (oh->_clk && !IS_ERR(oh->_clk))
+ clk_disable(oh->_clk);
+
+ if (oh->slaves_cnt > 0) {
+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
+ struct clk *c = os->_clk;
+
+ if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE))
+ clk_disable(c);
+ }
+ }
+
+ /* The opt clocks are controlled by the device driver. */
+
+ return 0;
+}
+
+/**
+ * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use
+ * @oh: struct omap_hwmod *
+ *
+ * Returns the array index of the OCP slave port that the MPU
+ * addresses the device on, or -EINVAL upon error or not found.
+ */
+static int _find_mpu_port_index(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ int i;
+ int found = 0;
+
+ if (!oh || oh->slaves_cnt == 0)
+ return -EINVAL;
+
+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
+ if (os->user & OCP_USER_MPU) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (found)
+ pr_debug("omap_hwmod: %s: MPU OCP slave port ID %d\n",
+ oh->name, i);
+ else
+ pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n",
+ oh->name);
+
+ return (found) ? i : -EINVAL;
+}
+
+/**
+ * _find_mpu_rt_base - find hwmod register target base addr accessible by MPU
+ * @oh: struct omap_hwmod *
+ *
+ * Return the virtual address of the base of the register target of
+ * device @oh, or NULL on error.
+ */
+static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
+{
+ struct omap_hwmod_ocp_if *os;
+ struct omap_hwmod_addr_space *mem;
+ int i;
+ int found = 0;
+
+ if (!oh || oh->slaves_cnt == 0)
+ return NULL;
+
+ os = *oh->slaves + index;
+
+ for (i = 0, mem = os->addr; i < os->addr_cnt; i++, mem++) {
+ if (mem->flags & ADDR_TYPE_RT) {
+ found = 1;
+ break;
+ }
+ }
+
+ /* XXX use ioremap() instead? */
+
+ if (found)
+ pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
+ oh->name, OMAP2_IO_ADDRESS(mem->pa_start));
+ else
+ pr_debug("omap_hwmod: %s: no MPU register target found\n",
+ oh->name);
+
+ return (found) ? OMAP2_IO_ADDRESS(mem->pa_start) : NULL;
+}
+
+/**
+ * _sysc_enable - try to bring a module out of idle via OCP_SYSCONFIG
+ * @oh: struct omap_hwmod *
+ *
+ * If module is marked as SWSUP_SIDLE, force the module out of slave
+ * idle; otherwise, configure it for smart-idle. If module is marked
+ * as SWSUP_MSUSPEND, force the module out of master standby;
+ * otherwise, configure it for smart-standby. No return value.
+ */
+static void _sysc_enable(struct omap_hwmod *oh)
+{
+ u8 idlemode;
+ u32 v;
+
+ if (!oh->sysconfig)
+ return;
+
+ v = oh->_sysc_cache;
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) {
+ idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ?
+ HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
+ _set_slave_idlemode(oh, idlemode, &v);
+ }
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) {
+ idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
+ HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
+ _set_master_standbymode(oh, idlemode, &v);
+ }
+
+ /* XXX OCP AUTOIDLE bit? */
+
+ if (oh->flags & HWMOD_SET_DEFAULT_CLOCKACT &&
+ oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY)
+ _set_clockactivity(oh, oh->sysconfig->clockact, &v);
+
+ _write_sysconfig(v, oh);
+}
+
+/**
+ * _sysc_idle - try to put a module into idle via OCP_SYSCONFIG
+ * @oh: struct omap_hwmod *
+ *
+ * If module is marked as SWSUP_SIDLE, force the module into slave
+ * idle; otherwise, configure it for smart-idle. If module is marked
+ * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
+ * configure it for smart-standby. No return value.
+ */
+static void _sysc_idle(struct omap_hwmod *oh)
+{
+ u8 idlemode;
+ u32 v;
+
+ if (!oh->sysconfig)
+ return;
+
+ v = oh->_sysc_cache;
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) {
+ idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ?
+ HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART;
+ _set_slave_idlemode(oh, idlemode, &v);
+ }
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) {
+ idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
+ HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART;
+ _set_master_standbymode(oh, idlemode, &v);
+ }
+
+ _write_sysconfig(v, oh);
+}
+
+/**
+ * _sysc_shutdown - force a module into idle via OCP_SYSCONFIG
+ * @oh: struct omap_hwmod *
+ *
+ * Force the module into slave idle and master suspend. No return
+ * value.
+ */
+static void _sysc_shutdown(struct omap_hwmod *oh)
+{
+ u32 v;
+
+ if (!oh->sysconfig)
+ return;
+
+ v = oh->_sysc_cache;
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE)
+ _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v);
+
+ if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE)
+ _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v);
+
+ /* XXX clear OCP AUTOIDLE bit? */
+
+ _write_sysconfig(v, oh);
+}
+
+/**
+ * _lookup - find an omap_hwmod by name
+ * @name: find an omap_hwmod by name
+ *
+ * Return a pointer to an omap_hwmod by name, or NULL if not found.
+ * Caller must hold omap_hwmod_mutex.
+ */
+static struct omap_hwmod *_lookup(const char *name)
+{
+ struct omap_hwmod *oh, *temp_oh;
+
+ oh = NULL;
+
+ list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
+ if (!strcmp(name, temp_oh->name)) {
+ oh = temp_oh;
+ break;
+ }
+ }
+
+ return oh;
+}
+
+/**
+ * _init_clocks - clk_get() all clocks associated with this hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Called by omap_hwmod_late_init() (after omap2_clk_init()).
+ * Resolves all clock names embedded in the hwmod. Must be called
+ * with omap_hwmod_mutex held. Returns -EINVAL if the omap_hwmod
+ * has not yet been registered or if the clocks have already been
+ * initialized, 0 on success, or a non-zero error on failure.
+ */
+static int _init_clocks(struct omap_hwmod *oh)
+{
+ int ret = 0;
+
+ if (!oh || (oh->_state != _HWMOD_STATE_REGISTERED))
+ return -EINVAL;
+
+ pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name);
+
+ ret |= _init_main_clk(oh);
+ ret |= _init_interface_clks(oh);
+ ret |= _init_opt_clks(oh);
+
+ oh->_state = _HWMOD_STATE_CLKS_INITED;
+
+ return ret;
+}
+
+/**
+ * _wait_target_ready - wait for a module to leave slave idle
+ * @oh: struct omap_hwmod *
+ *
+ * Wait for a module @oh to leave slave idle. Returns 0 if the module
+ * does not have an IDLEST bit or if the module successfully leaves
+ * slave idle; otherwise, pass along the return value of the
+ * appropriate *_cm_wait_module_ready() function.
+ */
+static int _wait_target_ready(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ int ret;
+
+ if (!oh)
+ return -EINVAL;
+
+ if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
+ return 0;
+
+ os = *oh->slaves + oh->_mpu_port_index;
+
+ if (!(os->flags & OCPIF_HAS_IDLEST))
+ return 0;
+
+ /* XXX check module SIDLEMODE */
+
+ /* XXX check clock enable states */
+
+ if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+ ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs,
+ oh->prcm.omap2.idlest_reg_id,
+ oh->prcm.omap2.idlest_idle_bit);
+#if 0
+ } else if (cpu_is_omap44xx()) {
+ ret = omap4_cm_wait_module_ready(oh->prcm.omap4.module_offs,
+ oh->prcm.omap4.device_offs);
+#endif
+ } else {
+ BUG();
+ };
+
+ return ret;
+}
+
+/**
+ * _reset - reset an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
+ * enabled for this to work. Must be called with omap_hwmod_mutex
+ * held. Returns -EINVAL if the hwmod cannot be reset this way or if
+ * the hwmod is in the wrong state, -ETIMEDOUT if the module did not
+ * reset in time, or 0 upon success.
+ */
+static int _reset(struct omap_hwmod *oh)
+{
+ u32 r, v;
+ int c;
+
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET) ||
+ (oh->sysconfig->sysc_flags & SYSS_MISSING))
+ return -EINVAL;
+
+ /* clocks must be on for this operation */
+ if (oh->_state != _HWMOD_STATE_ENABLED) {
+ WARN(1, "omap_hwmod: %s: reset can only be entered from "
+ "enabled state\n", oh->name);
+ return -EINVAL;
+ }
+
+ pr_debug("omap_hwmod: %s: resetting\n", oh->name);
+
+ v = oh->_sysc_cache;
+ r = _set_softreset(oh, &v);
+ if (r)
+ return r;
+ _write_sysconfig(v, oh);
+
+ c = 0;
+ while (c < MAX_MODULE_RESET_WAIT &&
+ !(omap_hwmod_readl(oh, oh->sysconfig->syss_offs) &
+ SYSS_RESETDONE_MASK)) {
+ udelay(1);
+ c++;
+ }
+
+ if (c == MAX_MODULE_RESET_WAIT)
+ WARN(1, "omap_hwmod: %s: failed to reset in %d usec\n",
+ oh->name, MAX_MODULE_RESET_WAIT);
+ else
+ pr_debug("omap_hwmod: %s: reset in %d usec\n", oh->name,
+ MAX_MODULE_RESET_WAIT);
+
+ /*
+ * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
+ * _wait_target_ready() or _reset()
+ */
+
+ return (c == MAX_MODULE_RESET_WAIT) ? -ETIMEDOUT : 0;
+}
+
+/**
+ * _enable - enable an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
+ * register target. Must be called with omap_hwmod_mutex held.
+ * Returns -EINVAL if the hwmod is in the wrong state or passes along
+ * the return value of _wait_target_ready().
+ */
+static int _enable(struct omap_hwmod *oh)
+{
+ int r;
+
+ if (oh->_state != _HWMOD_STATE_INITIALIZED &&
+ oh->_state != _HWMOD_STATE_IDLE &&
+ oh->_state != _HWMOD_STATE_DISABLED) {
+ WARN(1, "omap_hwmod: %s: enabled state can only be entered "
+ "from initialized, idle, or disabled state\n", oh->name);
+ return -EINVAL;
+ }
+
+ pr_debug("omap_hwmod: %s: enabling\n", oh->name);
+
+ /* XXX mux balls */
+
+ _add_initiator_dep(oh, mpu_oh);
+ _enable_clocks(oh);
+
+ if (oh->sysconfig) {
+ if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED))
+ _update_sysc_cache(oh);
+ _sysc_enable(oh);
+ }
+
+ r = _wait_target_ready(oh);
+ if (!r)
+ oh->_state = _HWMOD_STATE_ENABLED;
+
+ return r;
+}
+
+/**
+ * _idle - idle an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Idles an omap_hwmod @oh. This should be called once the hwmod has
+ * no further work. Returns -EINVAL if the hwmod is in the wrong
+ * state or returns 0.
+ */
+static int _idle(struct omap_hwmod *oh)
+{
+ if (oh->_state != _HWMOD_STATE_ENABLED) {
+ WARN(1, "omap_hwmod: %s: idle state can only be entered from "
+ "enabled state\n", oh->name);
+ return -EINVAL;
+ }
+
+ pr_debug("omap_hwmod: %s: idling\n", oh->name);
+
+ if (oh->sysconfig)
+ _sysc_idle(oh);
+ _del_initiator_dep(oh, mpu_oh);
+ _disable_clocks(oh);
+
+ oh->_state = _HWMOD_STATE_IDLE;
+
+ return 0;
+}
+
+/**
+ * _shutdown - shutdown an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Shut down an omap_hwmod @oh. This should be called when the driver
+ * used for the hwmod is removed or unloaded or if the driver is not
+ * used by the system. Returns -EINVAL if the hwmod is in the wrong
+ * state or returns 0.
+ */
+static int _shutdown(struct omap_hwmod *oh)
+{
+ if (oh->_state != _HWMOD_STATE_IDLE &&
+ oh->_state != _HWMOD_STATE_ENABLED) {
+ WARN(1, "omap_hwmod: %s: disabled state can only be entered "
+ "from idle, or enabled state\n", oh->name);
+ return -EINVAL;
+ }
+
+ pr_debug("omap_hwmod: %s: disabling\n", oh->name);
+
+ if (oh->sysconfig)
+ _sysc_shutdown(oh);
+ _del_initiator_dep(oh, mpu_oh);
+ /* XXX what about the other system initiators here? DMA, tesla, d2d */
+ _disable_clocks(oh);
+ /* XXX Should this code also force-disable the optional clocks? */
+
+ /* XXX mux any associated balls to safe mode */
+
+ oh->_state = _HWMOD_STATE_DISABLED;
+
+ return 0;
+}
+
+/**
+ * _write_clockact_lock - set the module's clockactivity bits
+ * @oh: struct omap_hwmod *
+ * @clockact: CLOCKACTIVITY field bits
+ *
+ * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh
+ * OCP_SYSCONFIG register. Returns -EINVAL if the hwmod is in the
+ * wrong state or returns 0.
+ */
+static int _write_clockact_lock(struct omap_hwmod *oh, u8 clockact)
+{
+ u32 v;
+
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ v = oh->_sysc_cache;
+ _set_clockactivity(oh, clockact, &v);
+ _write_sysconfig(v, oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+
+/**
+ * _setup - do initial configuration of omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh
+ * OCP_SYSCONFIG register. Must be called with omap_hwmod_mutex
+ * held. Returns -EINVAL if the hwmod is in the wrong state or returns
+ * 0.
+ */
+static int _setup(struct omap_hwmod *oh)
+{
+ struct omap_hwmod_ocp_if *os;
+ int i;
+
+ if (!oh)
+ return -EINVAL;
+
+ /* Set iclk autoidle mode */
+ if (oh->slaves_cnt > 0) {
+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
+ struct clk *c = os->_clk;
+
+ if (!c || IS_ERR(c))
+ continue;
+
+ if (os->flags & OCPIF_SWSUP_IDLE) {
+ /* XXX omap_iclk_deny_idle(c); */
+ } else {
+ /* XXX omap_iclk_allow_idle(c); */
+ clk_enable(c);
+ }
+ }
+ }
+
+ oh->_state = _HWMOD_STATE_INITIALIZED;
+
+ _enable(oh);
+
+ if (!(oh->flags & HWMOD_INIT_NO_RESET))
+ _reset(oh);
+
+ /* XXX OCP AUTOIDLE bit? */
+ /* XXX OCP ENAWAKEUP bit? */
+
+ if (!(oh->flags & HWMOD_INIT_NO_IDLE))
+ _idle(oh);
+
+ return 0;
+}
+
+
+
+/* Public functions */
+
+u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs)
+{
+ return __raw_readl(oh->_rt_va + reg_offs);
+}
+
+void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs)
+{
+ __raw_writel(v, oh->_rt_va + reg_offs);
+}
+
+/**
+ * omap_hwmod_register - register a struct omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod already
+ * has been registered by the same name; -EINVAL if the omap_hwmod is in the
+ * wrong state, or 0 on success.
+ *
+ * XXX The data should be copied into bootmem, so the original data
+ * should be marked __initdata and freed after init. This would allow
+ * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
+ * that the copy process would be relatively complex due to the large number
+ * of substructures.
+ */
+int omap_hwmod_register(struct omap_hwmod *oh)
+{
+ int ret, ms_id;
+
+ if (!oh || (oh->_state != _HWMOD_STATE_UNKNOWN))
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+
+ pr_debug("omap_hwmod: %s: registering\n", oh->name);
+
+ if (_lookup(oh->name)) {
+ ret = -EEXIST;
+ goto ohr_unlock;
+ }
+
+ ms_id = _find_mpu_port_index(oh);
+ if (!IS_ERR_VALUE(ms_id)) {
+ oh->_mpu_port_index = ms_id;
+ oh->_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
+ } else {
+ oh->_int_flags |= _HWMOD_NO_MPU_PORT;
+ }
+
+ list_add_tail(&oh->node, &omap_hwmod_list);
+
+ oh->_state = _HWMOD_STATE_REGISTERED;
+
+ ret = 0;
+
+ohr_unlock:
+ mutex_unlock(&omap_hwmod_mutex);
+ return ret;
+}
+
+/**
+ * omap_hwmod_lookup - look up a registered omap_hwmod by name
+ * @name: name of the omap_hwmod to look up
+ *
+ * Given a @name of an omap_hwmod, return a pointer to the registered
+ * struct omap_hwmod *, or NULL upon error.
+ */
+struct omap_hwmod *omap_hwmod_lookup(const char *name)
+{
+ struct omap_hwmod *oh;
+
+ if (!name)
+ return NULL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ oh = _lookup(name);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return oh;
+}
+
+/**
+ * omap_hwmod_for_each - call function for each registered omap_hwmod
+ * @fn: pointer to a callback function
+ *
+ * Call @fn for each registered omap_hwmod, passing @data to each
+ * function. @fn must return 0 for success or any other value for
+ * failure. If @fn returns non-zero, the iteration across omap_hwmods
+ * will stop and the non-zero return value will be passed to the
+ * caller of omap_hwmod_for_each(). @fn is called with
+ * omap_hwmod_for_each() held.
+ */
+int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh))
+{
+ struct omap_hwmod *temp_oh;
+ int ret;
+
+ if (!fn)
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
+ ret = (*fn)(temp_oh);
+ if (ret)
+ break;
+ }
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return ret;
+}
+
+
+/**
+ * omap_hwmod_init - init omap_hwmod code and register hwmods
+ * @ohs: pointer to an array of omap_hwmods to register
+ *
+ * Intended to be called early in boot before the clock framework is
+ * initialized. If @ohs is not null, will register all omap_hwmods
+ * listed in @ohs that are valid for this chip. Returns -EINVAL if
+ * omap_hwmod_init() has already been called or 0 otherwise.
+ */
+int omap_hwmod_init(struct omap_hwmod **ohs)
+{
+ struct omap_hwmod *oh;
+ int r;
+
+ if (inited)
+ return -EINVAL;
+
+ inited = 1;
+
+ if (!ohs)
+ return 0;
+
+ oh = *ohs;
+ while (oh) {
+ if (omap_chip_is(oh->omap_chip)) {
+ r = omap_hwmod_register(oh);
+ WARN(r, "omap_hwmod: %s: omap_hwmod_register returned "
+ "%d\n", oh->name, r);
+ }
+ oh = *++ohs;
+ }
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_late_init - do some post-clock framework initialization
+ *
+ * Must be called after omap2_clk_init(). Resolves the struct clk names
+ * to struct clk pointers for each registered omap_hwmod. Also calls
+ * _setup() on each hwmod. Returns 0.
+ */
+int omap_hwmod_late_init(void)
+{
+ int r;
+
+ /* XXX check return value */
+ r = omap_hwmod_for_each(_init_clocks);
+ WARN(r, "omap_hwmod: omap_hwmod_late_init(): _init_clocks failed\n");
+
+ mpu_oh = omap_hwmod_lookup(MPU_INITIATOR_NAME);
+ WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n",
+ MPU_INITIATOR_NAME);
+
+ omap_hwmod_for_each(_setup);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_unregister - unregister an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Unregisters a previously-registered omap_hwmod @oh. There's probably
+ * no use case for this, so it is likely to be removed in a later version.
+ *
+ * XXX Free all of the bootmem-allocated structures here when that is
+ * implemented. Make it clear that core code is the only code that is
+ * expected to unregister modules.
+ */
+int omap_hwmod_unregister(struct omap_hwmod *oh)
+{
+ if (!oh)
+ return -EINVAL;
+
+ pr_debug("omap_hwmod: %s: unregistering\n", oh->name);
+
+ mutex_lock(&omap_hwmod_mutex);
+ list_del(&oh->node);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_enable - enable an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Enable an omap_hwomd @oh. Intended to be called by omap_device_enable().
+ * Returns -EINVAL on error or passes along the return value from _enable().
+ */
+int omap_hwmod_enable(struct omap_hwmod *oh)
+{
+ int r;
+
+ if (!oh)
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ r = _enable(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return r;
+}
+
+/**
+ * omap_hwmod_idle - idle an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Idle an omap_hwomd @oh. Intended to be called by omap_device_idle().
+ * Returns -EINVAL on error or passes along the return value from _idle().
+ */
+int omap_hwmod_idle(struct omap_hwmod *oh)
+{
+ if (!oh)
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ _idle(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_shutdown - shutdown an omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Shutdown an omap_hwomd @oh. Intended to be called by
+ * omap_device_shutdown(). Returns -EINVAL on error or passes along
+ * the return value from _shutdown().
+ */
+int omap_hwmod_shutdown(struct omap_hwmod *oh)
+{
+ if (!oh)
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ _shutdown(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_enable_clocks - enable main_clk, all interface clocks
+ * @oh: struct omap_hwmod *oh
+ *
+ * Intended to be called by the omap_device code.
+ */
+int omap_hwmod_enable_clocks(struct omap_hwmod *oh)
+{
+ mutex_lock(&omap_hwmod_mutex);
+ _enable_clocks(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_disable_clocks - disable main_clk, all interface clocks
+ * @oh: struct omap_hwmod *oh
+ *
+ * Intended to be called by the omap_device code.
+ */
+int omap_hwmod_disable_clocks(struct omap_hwmod *oh)
+{
+ mutex_lock(&omap_hwmod_mutex);
+ _disable_clocks(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_ocp_barrier - wait for posted writes against the hwmod to complete
+ * @oh: struct omap_hwmod *oh
+ *
+ * Intended to be called by drivers and core code when all posted
+ * writes to a device must complete before continuing further
+ * execution (for example, after clearing some device IRQSTATUS
+ * register bits)
+ *
+ * XXX what about targets with multiple OCP threads?
+ */
+void omap_hwmod_ocp_barrier(struct omap_hwmod *oh)
+{
+ BUG_ON(!oh);
+
+ if (!oh->sysconfig || !oh->sysconfig->sysc_flags) {
+ WARN(1, "omap_device: %s: OCP barrier impossible due to "
+ "device configuration\n", oh->name);
+ return;
+ }
+
+ /*
+ * Forces posted writes to complete on the OCP thread handling
+ * register writes
+ */
+ omap_hwmod_readl(oh, oh->sysconfig->sysc_offs);
+}
+
+/**
+ * omap_hwmod_reset - reset the hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Under some conditions, a driver may wish to reset the entire device.
+ * Called from omap_device code. Returns -EINVAL on error or passes along
+ * the return value from _reset()/_enable().
+ */
+int omap_hwmod_reset(struct omap_hwmod *oh)
+{
+ int r;
+
+ if (!oh || !(oh->_state & _HWMOD_STATE_ENABLED))
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ r = _reset(oh);
+ if (!r)
+ r = _enable(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return r;
+}
+
+/**
+ * omap_hwmod_count_resources - count number of struct resources needed by hwmod
+ * @oh: struct omap_hwmod *
+ * @res: pointer to the first element of an array of struct resource to fill
+ *
+ * Count the number of struct resource array elements necessary to
+ * contain omap_hwmod @oh resources. Intended to be called by code
+ * that registers omap_devices. Intended to be used to determine the
+ * size of a dynamically-allocated struct resource array, before
+ * calling omap_hwmod_fill_resources(). Returns the number of struct
+ * resource array elements needed.
+ *
+ * XXX This code is not optimized. It could attempt to merge adjacent
+ * resource IDs.
+ *
+ */
+int omap_hwmod_count_resources(struct omap_hwmod *oh)
+{
+ int ret, i;
+
+ ret = oh->mpu_irqs_cnt + oh->sdma_chs_cnt;
+
+ for (i = 0; i < oh->slaves_cnt; i++)
+ ret += (*oh->slaves + i)->addr_cnt;
+
+ return ret;
+}
+
+/**
+ * omap_hwmod_fill_resources - fill struct resource array with hwmod data
+ * @oh: struct omap_hwmod *
+ * @res: pointer to the first element of an array of struct resource to fill
+ *
+ * Fill the struct resource array @res with resource data from the
+ * omap_hwmod @oh. Intended to be called by code that registers
+ * omap_devices. See also omap_hwmod_count_resources(). Returns the
+ * number of array elements filled.
+ */
+int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
+{
+ int i, j;
+ int r = 0;
+
+ /* For each IRQ, DMA, memory area, fill in array.*/
+
+ for (i = 0; i < oh->mpu_irqs_cnt; i++) {
+ (res + r)->start = *(oh->mpu_irqs + i);
+ (res + r)->end = *(oh->mpu_irqs + i);
+ (res + r)->flags = IORESOURCE_IRQ;
+ r++;
+ }
+
+ for (i = 0; i < oh->sdma_chs_cnt; i++) {
+ (res + r)->name = (oh->sdma_chs + i)->name;
+ (res + r)->start = (oh->sdma_chs + i)->dma_ch;
+ (res + r)->end = (oh->sdma_chs + i)->dma_ch;
+ (res + r)->flags = IORESOURCE_DMA;
+ r++;
+ }
+
+ for (i = 0; i < oh->slaves_cnt; i++) {
+ struct omap_hwmod_ocp_if *os;
+
+ os = *oh->slaves + i;
+
+ for (j = 0; j < os->addr_cnt; j++) {
+ (res + r)->start = (os->addr + j)->pa_start;
+ (res + r)->end = (os->addr + j)->pa_end;
+ (res + r)->flags = IORESOURCE_MEM;
+ r++;
+ }
+ }
+
+ return r;
+}
+
+/**
+ * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain
+ * @oh: struct omap_hwmod *
+ *
+ * Return the powerdomain pointer associated with the OMAP module
+ * @oh's main clock. If @oh does not have a main clk, return the
+ * powerdomain associated with the interface clock associated with the
+ * module's MPU port. (XXX Perhaps this should use the SDMA port
+ * instead?) Returns NULL on error, or a struct powerdomain * on
+ * success.
+ */
+struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh)
+{
+ struct clk *c;
+
+ if (!oh)
+ return NULL;
+
+ if (oh->_clk) {
+ c = oh->_clk;
+ } else {
+ if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
+ return NULL;
+ c = oh->slaves[oh->_mpu_port_index]->_clk;
+ }
+
+ return c->clkdm->pwrdm.ptr;
+
+}
+
+/**
+ * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh
+ * @oh: struct omap_hwmod *
+ * @init_oh: struct omap_hwmod * (initiator)
+ *
+ * Add a sleep dependency between the initiator @init_oh and @oh.
+ * Intended to be called by DSP/Bridge code via platform_data for the
+ * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
+ * code needs to add/del initiator dependencies dynamically
+ * before/after accessing a device. Returns the return value from
+ * _add_initiator_dep().
+ *
+ * XXX Keep a usecount in the clockdomain code
+ */
+int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
+ struct omap_hwmod *init_oh)
+{
+ return _add_initiator_dep(oh, init_oh);
+}
+
+/*
+ * XXX what about functions for drivers to save/restore ocp_sysconfig
+ * for context save/restore operations?
+ */
+
+/**
+ * omap_hwmod_del_initiator_dep - remove sleepdep from @init_oh to @oh
+ * @oh: struct omap_hwmod *
+ * @init_oh: struct omap_hwmod * (initiator)
+ *
+ * Remove a sleep dependency between the initiator @init_oh and @oh.
+ * Intended to be called by DSP/Bridge code via platform_data for the
+ * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
+ * code needs to add/del initiator dependencies dynamically
+ * before/after accessing a device. Returns the return value from
+ * _del_initiator_dep().
+ *
+ * XXX Keep a usecount in the clockdomain code
+ */
+int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
+ struct omap_hwmod *init_oh)
+{
+ return _del_initiator_dep(oh, init_oh);
+}
+
+/**
+ * omap_hwmod_set_clockact_none - set clockactivity test to BOTH
+ * @oh: struct omap_hwmod *
+ *
+ * On some modules, this function can affect the wakeup latency vs.
+ * power consumption balance. Intended to be called by the
+ * omap_device layer. Passes along the return value from
+ * _write_clockact_lock().
+ */
+int omap_hwmod_set_clockact_both(struct omap_hwmod *oh)
+{
+ return _write_clockact_lock(oh, CLOCKACT_TEST_BOTH);
+}
+
+/**
+ * omap_hwmod_set_clockact_none - set clockactivity test to MAIN
+ * @oh: struct omap_hwmod *
+ *
+ * On some modules, this function can affect the wakeup latency vs.
+ * power consumption balance. Intended to be called by the
+ * omap_device layer. Passes along the return value from
+ * _write_clockact_lock().
+ */
+int omap_hwmod_set_clockact_main(struct omap_hwmod *oh)
+{
+ return _write_clockact_lock(oh, CLOCKACT_TEST_MAIN);
+}
+
+/**
+ * omap_hwmod_set_clockact_none - set clockactivity test to ICLK
+ * @oh: struct omap_hwmod *
+ *
+ * On some modules, this function can affect the wakeup latency vs.
+ * power consumption balance. Intended to be called by the
+ * omap_device layer. Passes along the return value from
+ * _write_clockact_lock().
+ */
+int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh)
+{
+ return _write_clockact_lock(oh, CLOCKACT_TEST_ICLK);
+}
+
+/**
+ * omap_hwmod_set_clockact_none - set clockactivity test to NONE
+ * @oh: struct omap_hwmod *
+ *
+ * On some modules, this function can affect the wakeup latency vs.
+ * power consumption balance. Intended to be called by the
+ * omap_device layer. Passes along the return value from
+ * _write_clockact_lock().
+ */
+int omap_hwmod_set_clockact_none(struct omap_hwmod *oh)
+{
+ return _write_clockact_lock(oh, CLOCKACT_TEST_NONE);
+}
+
+/**
+ * omap_hwmod_enable_wakeup - allow device to wake up the system
+ * @oh: struct omap_hwmod *
+ *
+ * Sets the module OCP socket ENAWAKEUP bit to allow the module to
+ * send wakeups to the PRCM. Eventually this should sets PRCM wakeup
+ * registers to cause the PRCM to receive wakeup events from the
+ * module. Does not set any wakeup routing registers beyond this
+ * point - if the module is to wake up any other module or subsystem,
+ * that must be set separately. Called by omap_device code. Returns
+ * -EINVAL on error or 0 upon success.
+ */
+int omap_hwmod_enable_wakeup(struct omap_hwmod *oh)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ _enable_wakeup(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
+
+/**
+ * omap_hwmod_disable_wakeup - prevent device from waking the system
+ * @oh: struct omap_hwmod *
+ *
+ * Clears the module OCP socket ENAWAKEUP bit to prevent the module
+ * from sending wakeups to the PRCM. Eventually this should clear
+ * PRCM wakeup registers to cause the PRCM to ignore wakeup events
+ * from the module. Does not set any wakeup routing registers beyond
+ * this point - if the module is to wake up any other module or
+ * subsystem, that must be set separately. Called by omap_device
+ * code. Returns -EINVAL on error or 0 upon success.
+ */
+int omap_hwmod_disable_wakeup(struct omap_hwmod *oh)
+{
+ if (!oh->sysconfig ||
+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
+ return -EINVAL;
+
+ mutex_lock(&omap_hwmod_mutex);
+ _disable_wakeup(oh);
+ mutex_unlock(&omap_hwmod_mutex);
+
+ return 0;
+}
--- /dev/null
+/*
+ * omap_hwmod macros, structures
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Paul Walmsley
+ *
+ * Created in collaboration with (alphabetical order): Benoit Cousson,
+ * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
+ * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
+ *
+ * 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.
+ *
+ * These headers and macros are used to define OMAP on-chip module
+ * data and their integration with other OMAP modules and Linux.
+ *
+ * References:
+ * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
+ * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
+ * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
+ * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
+ * - Open Core Protocol Specification 2.2
+ *
+ * To do:
+ * - add interconnect error log structures
+ * - add pinmuxing
+ * - init_conn_id_bit (CONNID_BIT_VECTOR)
+ * - implement default hwmod SMS/SDRC flags?
+ *
+ */
+#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
+#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
+
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+
+#include <mach/cpu.h>
+
+struct omap_device;
+
+/* OCP SYSCONFIG bit shifts/masks */
+#define SYSC_MIDLEMODE_SHIFT 12
+#define SYSC_MIDLEMODE_MASK (0x3 << SYSC_MIDLEMODE_SHIFT)
+#define SYSC_CLOCKACTIVITY_SHIFT 8
+#define SYSC_CLOCKACTIVITY_MASK (0x3 << SYSC_CLOCKACTIVITY_SHIFT)
+#define SYSC_SIDLEMODE_SHIFT 3
+#define SYSC_SIDLEMODE_MASK (0x3 << SYSC_SIDLEMODE_SHIFT)
+#define SYSC_ENAWAKEUP_SHIFT 2
+#define SYSC_ENAWAKEUP_MASK (1 << SYSC_ENAWAKEUP_SHIFT)
+#define SYSC_SOFTRESET_SHIFT 1
+#define SYSC_SOFTRESET_MASK (1 << SYSC_SOFTRESET_SHIFT)
+
+/* OCP SYSSTATUS bit shifts/masks */
+#define SYSS_RESETDONE_SHIFT 0
+#define SYSS_RESETDONE_MASK (1 << SYSS_RESETDONE_SHIFT)
+
+/* Master standby/slave idle mode flags */
+#define HWMOD_IDLEMODE_FORCE (1 << 0)
+#define HWMOD_IDLEMODE_NO (1 << 1)
+#define HWMOD_IDLEMODE_SMART (1 << 2)
+
+
+/**
+ * struct omap_hwmod_dma_info - MPU address space handled by the hwmod
+ * @name: name of the DMA channel (module local name)
+ * @dma_ch: DMA channel ID
+ *
+ * @name should be something short, e.g., "tx" or "rx". It is for use
+ * by platform_get_resource_byname(). It is defined locally to the
+ * hwmod.
+ */
+struct omap_hwmod_dma_info {
+ const char *name;
+ u16 dma_ch;
+};
+
+/**
+ * struct omap_hwmod_opt_clk - optional clocks used by this hwmod
+ * @role: "sys", "32k", "tv", etc -- for use in clk_get()
+ * @clkdev_dev_id: opt clock: clkdev dev_id string
+ * @clkdev_con_id: opt clock: clkdev con_id string
+ * @_clk: pointer to the struct clk (filled in at runtime)
+ *
+ * The module's interface clock and main functional clock should not
+ * be added as optional clocks.
+ */
+struct omap_hwmod_opt_clk {
+ const char *role;
+ const char *clkdev_dev_id;
+ const char *clkdev_con_id;
+ struct clk *_clk;
+};
+
+
+/* omap_hwmod_omap2_firewall.flags bits */
+#define OMAP_FIREWALL_L3 (1 << 0)
+#define OMAP_FIREWALL_L4 (1 << 1)
+
+/**
+ * struct omap_hwmod_omap2_firewall - OMAP2/3 device firewall data
+ * @l3_perm_bit: bit shift for L3_PM_*_PERMISSION_*
+ * @l4_fw_region: L4 firewall region ID
+ * @l4_prot_group: L4 protection group ID
+ * @flags: (see omap_hwmod_omap2_firewall.flags macros above)
+ */
+struct omap_hwmod_omap2_firewall {
+ u8 l3_perm_bit;
+ u8 l4_fw_region;
+ u8 l4_prot_group;
+ u8 flags;
+};
+
+
+/*
+ * omap_hwmod_addr_space.flags bits
+ *
+ * ADDR_MAP_ON_INIT: Map this address space during omap_hwmod init.
+ * ADDR_TYPE_RT: Address space contains module register target data.
+ */
+#define ADDR_MAP_ON_INIT (1 << 0)
+#define ADDR_TYPE_RT (1 << 1)
+
+/**
+ * struct omap_hwmod_addr_space - MPU address space handled by the hwmod
+ * @pa_start: starting physical address
+ * @pa_end: ending physical address
+ * @flags: (see omap_hwmod_addr_space.flags macros above)
+ *
+ * Address space doesn't necessarily follow physical interconnect
+ * structure. GPMC is one example.
+ */
+struct omap_hwmod_addr_space {
+ u32 pa_start;
+ u32 pa_end;
+ u8 flags;
+};
+
+
+/*
+ * omap_hwmod_ocp_if.user bits: these indicate the initiators that use this
+ * interface to interact with the hwmod. Used to add sleep dependencies
+ * when the module is enabled or disabled.
+ */
+#define OCP_USER_MPU (1 << 0)
+#define OCP_USER_SDMA (1 << 1)
+
+/* omap_hwmod_ocp_if.flags bits */
+#define OCPIF_HAS_IDLEST (1 << 0)
+#define OCPIF_SWSUP_IDLE (1 << 1)
+#define OCPIF_CAN_BURST (1 << 2)
+
+/**
+ * struct omap_hwmod_ocp_if - OCP interface data
+ * @master: struct omap_hwmod that initiates OCP transactions on this link
+ * @slave: struct omap_hwmod that responds to OCP transactions on this link
+ * @addr: address space associated with this link
+ * @clkdev_dev_id: interface clock: clkdev dev_id string
+ * @clkdev_con_id: interface clock: clkdev con_id string
+ * @_clk: pointer to the interface struct clk (filled in at runtime)
+ * @fw: interface firewall data
+ * @addr_cnt: ARRAY_SIZE(@addr)
+ * @width: OCP data width
+ * @thread_cnt: number of threads
+ * @max_burst_len: maximum burst length in @width sized words (0 if unlimited)
+ * @user: initiators using this interface (see OCP_USER_* macros above)
+ * @flags: OCP interface flags (see OCPIF_* macros above)
+ *
+ * It may also be useful to add a tag_cnt field for OCP2.x devices.
+ *
+ * Parameter names beginning with an underscore are managed internally by
+ * the omap_hwmod code and should not be set during initialization.
+ */
+struct omap_hwmod_ocp_if {
+ struct omap_hwmod *master;
+ struct omap_hwmod *slave;
+ struct omap_hwmod_addr_space *addr;
+ const char *clkdev_dev_id;
+ const char *clkdev_con_id;
+ struct clk *_clk;
+ union {
+ struct omap_hwmod_omap2_firewall omap2;
+ } fw;
+ u8 addr_cnt;
+ u8 width;
+ u8 thread_cnt;
+ u8 max_burst_len;
+ u8 user;
+ u8 flags;
+};
+
+
+/* Macros for use in struct omap_hwmod_sysconfig */
+
+/* Flags for use in omap_hwmod_sysconfig.idlemodes */
+#define MASTER_STANDBY_SHIFT 2
+#define SLAVE_IDLE_SHIFT 0
+#define SIDLE_FORCE (HWMOD_IDLEMODE_FORCE << SLAVE_IDLE_SHIFT)
+#define SIDLE_NO (HWMOD_IDLEMODE_NO << SLAVE_IDLE_SHIFT)
+#define SIDLE_SMART (HWMOD_IDLEMODE_SMART << SLAVE_IDLE_SHIFT)
+#define MSTANDBY_FORCE (HWMOD_IDLEMODE_FORCE << MASTER_STANDBY_SHIFT)
+#define MSTANDBY_NO (HWMOD_IDLEMODE_NO << MASTER_STANDBY_SHIFT)
+#define MSTANDBY_SMART (HWMOD_IDLEMODE_SMART << MASTER_STANDBY_SHIFT)
+
+/* omap_hwmod_sysconfig.sysc_flags capability flags */
+#define SYSC_HAS_AUTOIDLE (1 << 0)
+#define SYSC_HAS_SOFTRESET (1 << 1)
+#define SYSC_HAS_ENAWAKEUP (1 << 2)
+#define SYSC_HAS_EMUFREE (1 << 3)
+#define SYSC_HAS_CLOCKACTIVITY (1 << 4)
+#define SYSC_HAS_SIDLEMODE (1 << 5)
+#define SYSC_HAS_MIDLEMODE (1 << 6)
+#define SYSS_MISSING (1 << 7)
+
+/* omap_hwmod_sysconfig.clockact flags */
+#define CLOCKACT_TEST_BOTH 0x0
+#define CLOCKACT_TEST_MAIN 0x1
+#define CLOCKACT_TEST_ICLK 0x2
+#define CLOCKACT_TEST_NONE 0x3
+
+/**
+ * struct omap_hwmod_sysconfig - hwmod OCP_SYSCONFIG/OCP_SYSSTATUS data
+ * @rev_offs: IP block revision register offset (from module base addr)
+ * @sysc_offs: OCP_SYSCONFIG register offset (from module base addr)
+ * @syss_offs: OCP_SYSSTATUS register offset (from module base addr)
+ * @idlemodes: One or more of {SIDLE,MSTANDBY}_{OFF,FORCE,SMART}
+ * @sysc_flags: SYS{C,S}_HAS* flags indicating SYSCONFIG bits supported
+ * @clockact: the default value of the module CLOCKACTIVITY bits
+ *
+ * @clockact describes to the module which clocks are likely to be
+ * disabled when the PRCM issues its idle request to the module. Some
+ * modules have separate clockdomains for the interface clock and main
+ * functional clock, and can check whether they should acknowledge the
+ * idle request based on the internal module functionality that has
+ * been associated with the clocks marked in @clockact. This field is
+ * only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below)
+ *
+ */
+struct omap_hwmod_sysconfig {
+ u16 rev_offs;
+ u16 sysc_offs;
+ u16 syss_offs;
+ u8 idlemodes;
+ u8 sysc_flags;
+ u8 clockact;
+};
+
+/**
+ * struct omap_hwmod_omap2_prcm - OMAP2/3-specific PRCM data
+ * @module_offs: PRCM submodule offset from the start of the PRM/CM
+ * @prcm_reg_id: PRCM register ID (e.g., 3 for CM_AUTOIDLE3)
+ * @module_bit: register bit shift for AUTOIDLE, WKST, WKEN, GRPSEL regs
+ * @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3)
+ * @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit
+ * @idlest_stdby_bit: register bit shift for CM_IDLEST master standby bit
+ *
+ * @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST,
+ * WKEN, GRPSEL registers. In an ideal world, no extra information
+ * would be needed for IDLEST information, but alas, there are some
+ * exceptions, so @idlest_reg_id, @idlest_idle_bit, @idlest_stdby_bit
+ * are needed for the IDLEST registers (c.f. 2430 I2CHS, 3430 USBHOST)
+ */
+struct omap_hwmod_omap2_prcm {
+ s16 module_offs;
+ u8 prcm_reg_id;
+ u8 module_bit;
+ u8 idlest_reg_id;
+ u8 idlest_idle_bit;
+ u8 idlest_stdby_bit;
+};
+
+
+/**
+ * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data
+ * @module_offs: PRCM submodule offset from the start of the PRM/CM1/CM2
+ * @device_offs: device register offset from @module_offs
+ * @submodule_wkdep_bit: bit shift of the WKDEP range
+ */
+struct omap_hwmod_omap4_prcm {
+ u32 module_offs;
+ u16 device_offs;
+ u8 submodule_wkdep_bit;
+};
+
+
+/*
+ * omap_hwmod.flags definitions
+ *
+ * HWMOD_SWSUP_SIDLE: omap_hwmod code should manually bring module in and out
+ * of idle, rather than relying on module smart-idle
+ * HWMOD_SWSUP_MSTDBY: omap_hwmod code should manually bring module in and out
+ * of standby, rather than relying on module smart-standby
+ * HWMOD_INIT_NO_RESET: don't reset this module at boot - important for
+ * SDRAM controller, etc.
+ * HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM
+ * controller, etc.
+ * HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup
+ */
+#define HWMOD_SWSUP_SIDLE (1 << 0)
+#define HWMOD_SWSUP_MSTANDBY (1 << 1)
+#define HWMOD_INIT_NO_RESET (1 << 2)
+#define HWMOD_INIT_NO_IDLE (1 << 3)
+#define HWMOD_SET_DEFAULT_CLOCKACT (1 << 4)
+
+/*
+ * omap_hwmod._int_flags definitions
+ * These are for internal use only and are managed by the omap_hwmod code.
+ *
+ * _HWMOD_NO_MPU_PORT: no path exists for the MPU to write to this module
+ * _HWMOD_WAKEUP_ENABLED: set when the omap_hwmod code has enabled ENAWAKEUP
+ * _HWMOD_SYSCONFIG_LOADED: set when the OCP_SYSCONFIG value has been cached
+ */
+#define _HWMOD_NO_MPU_PORT (1 << 0)
+#define _HWMOD_WAKEUP_ENABLED (1 << 1)
+#define _HWMOD_SYSCONFIG_LOADED (1 << 2)
+
+/*
+ * omap_hwmod._state definitions
+ *
+ * INITIALIZED: reset (optionally), initialized, enabled, disabled
+ * (optionally)
+ *
+ *
+ */
+#define _HWMOD_STATE_UNKNOWN 0
+#define _HWMOD_STATE_REGISTERED 1
+#define _HWMOD_STATE_CLKS_INITED 2
+#define _HWMOD_STATE_INITIALIZED 3
+#define _HWMOD_STATE_ENABLED 4
+#define _HWMOD_STATE_IDLE 5
+#define _HWMOD_STATE_DISABLED 6
+
+/**
+ * struct omap_hwmod - integration data for OMAP hardware "modules" (IP blocks)
+ * @name: name of the hwmod
+ * @od: struct omap_device currently associated with this hwmod (internal use)
+ * @mpu_irqs: ptr to an array of MPU IRQs (see also mpu_irqs_cnt)
+ * @sdma_chs: ptr to an array of SDMA channel IDs (see also sdma_chs_cnt)
+ * @prcm: PRCM data pertaining to this hwmod
+ * @clkdev_dev_id: main clock: clkdev dev_id string
+ * @clkdev_con_id: main clock: clkdev con_id string
+ * @_clk: pointer to the main struct clk (filled in at runtime)
+ * @opt_clks: other device clocks that drivers can request (0..*)
+ * @masters: ptr to array of OCP ifs that this hwmod can initiate on
+ * @slaves: ptr to array of OCP ifs that this hwmod can respond on
+ * @sysconfig: device SYSCONFIG/SYSSTATUS register data
+ * @dev_attr: arbitrary device attributes that can be passed to the driver
+ * @_sysc_cache: internal-use hwmod flags
+ * @_rt_va: cached register target start address (internal use)
+ * @_mpu_port_index: cached MPU register target slave ID (internal use)
+ * @msuspendmux_reg_id: CONTROL_MSUSPENDMUX register ID (1-6)
+ * @msuspendmux_shift: CONTROL_MSUSPENDMUX register bit shift
+ * @mpu_irqs_cnt: number of @mpu_irqs
+ * @sdma_chs_cnt: number of @sdma_chs
+ * @opt_clks_cnt: number of @opt_clks
+ * @master_cnt: number of @master entries
+ * @slaves_cnt: number of @slave entries
+ * @response_lat: device OCP response latency (in interface clock cycles)
+ * @_int_flags: internal-use hwmod flags
+ * @_state: internal-use hwmod state
+ * @flags: hwmod flags (documented below)
+ * @omap_chip: OMAP chips this hwmod is present on
+ * @node: list node for hwmod list (internal use)
+ *
+ * @clkdev_dev_id, @clkdev_con_id, and @clk all refer to this module's "main
+ * clock," which for our purposes is defined as "the functional clock needed
+ * for register accesses to complete." Modules may not have a main clock if
+ * the interface clock also serves as a main clock.
+ *
+ * Parameter names beginning with an underscore are managed internally by
+ * the omap_hwmod code and should not be set during initialization.
+ */
+struct omap_hwmod {
+ const char *name;
+ struct omap_device *od;
+ u8 *mpu_irqs;
+ struct omap_hwmod_dma_info *sdma_chs;
+ union {
+ struct omap_hwmod_omap2_prcm omap2;
+ struct omap_hwmod_omap4_prcm omap4;
+ } prcm;
+ const char *clkdev_dev_id;
+ const char *clkdev_con_id;
+ struct clk *_clk;
+ struct omap_hwmod_opt_clk *opt_clks;
+ struct omap_hwmod_ocp_if **masters; /* connect to *_IA */
+ struct omap_hwmod_ocp_if **slaves; /* connect to *_TA */
+ struct omap_hwmod_sysconfig *sysconfig;
+ void *dev_attr;
+ u32 _sysc_cache;
+ void __iomem *_rt_va;
+ struct list_head node;
+ u16 flags;
+ u8 _mpu_port_index;
+ u8 msuspendmux_reg_id;
+ u8 msuspendmux_shift;
+ u8 response_lat;
+ u8 mpu_irqs_cnt;
+ u8 sdma_chs_cnt;
+ u8 opt_clks_cnt;
+ u8 masters_cnt;
+ u8 slaves_cnt;
+ u8 hwmods_cnt;
+ u8 _int_flags;
+ u8 _state;
+ const struct omap_chip_id omap_chip;
+};
+
+int omap_hwmod_init(struct omap_hwmod **ohs);
+int omap_hwmod_register(struct omap_hwmod *oh);
+int omap_hwmod_unregister(struct omap_hwmod *oh);
+struct omap_hwmod *omap_hwmod_lookup(const char *name);
+int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh));
+int omap_hwmod_late_init(void);
+
+int omap_hwmod_enable(struct omap_hwmod *oh);
+int omap_hwmod_idle(struct omap_hwmod *oh);
+int omap_hwmod_shutdown(struct omap_hwmod *oh);
+
+int omap_hwmod_enable_clocks(struct omap_hwmod *oh);
+int omap_hwmod_disable_clocks(struct omap_hwmod *oh);
+
+int omap_hwmod_reset(struct omap_hwmod *oh);
+void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);
+
+void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs);
+u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs);
+
+int omap_hwmod_count_resources(struct omap_hwmod *oh);
+int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
+
+struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh);
+
+int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
+ struct omap_hwmod *init_oh);
+int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
+ struct omap_hwmod *init_oh);
+
+int omap_hwmod_set_clockact_both(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_main(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh);
+int omap_hwmod_set_clockact_none(struct omap_hwmod *oh);
+
+int omap_hwmod_enable_wakeup(struct omap_hwmod *oh);
+int omap_hwmod_disable_wakeup(struct omap_hwmod *oh);
+
+#endif
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