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@@ -0,0 +1,1554 @@
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+/*
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+ * omap_hwmod implementation for OMAP2/3/4
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+ *
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+ * Copyright (C) 2009 Nokia Corporation
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+ * Paul Walmsley
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+ * With fixes and testing from Kevin Hilman
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+ *
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+ * Created in collaboration with (alphabetical order): Benoit Cousson,
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+ * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
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+ * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ *
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+ * This code manages "OMAP modules" (on-chip devices) and their
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+ * integration with Linux device driver and bus code.
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+ *
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+ * References:
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+ * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
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+ * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
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+ * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
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+ * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
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+ * - Open Core Protocol Specification 2.2
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+ *
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+ * To do:
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+ * - pin mux handling
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+ * - handle IO mapping
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+ * - bus throughput & module latency measurement code
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+ *
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+ * XXX add tests at the beginning of each function to ensure the hwmod is
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+ * in the appropriate state
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+ * XXX error return values should be checked to ensure that they are
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+ * appropriate
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+ */
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+#undef DEBUG
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+
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+#include <linux/kernel.h>
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+#include <linux/errno.h>
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+#include <linux/io.h>
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+#include <linux/clk.h>
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+#include <linux/delay.h>
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+#include <linux/err.h>
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+#include <linux/list.h>
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+#include <linux/mutex.h>
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+#include <linux/bootmem.h>
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+
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+#include <mach/cpu.h>
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+#include <mach/clockdomain.h>
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+#include <mach/powerdomain.h>
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+#include <mach/clock.h>
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+#include <mach/omap_hwmod.h>
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+
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+#include "cm.h"
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+
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+/* Maximum microseconds to wait for OMAP module to reset */
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+#define MAX_MODULE_RESET_WAIT 10000
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+
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+/* Name of the OMAP hwmod for the MPU */
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+#define MPU_INITIATOR_NAME "mpu_hwmod"
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+
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+/* omap_hwmod_list contains all registered struct omap_hwmods */
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+static LIST_HEAD(omap_hwmod_list);
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+
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+static DEFINE_MUTEX(omap_hwmod_mutex);
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+
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+/* mpu_oh: used to add/remove MPU initiator from sleepdep list */
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+static struct omap_hwmod *mpu_oh;
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+
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+/* inited: 0 if omap_hwmod_init() has not yet been called; 1 otherwise */
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+static u8 inited;
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+
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+
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+/* Private functions */
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+
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+/**
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+ * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Load the current value of the hwmod OCP_SYSCONFIG register into the
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+ * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
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+ * OCP_SYSCONFIG register or 0 upon success.
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+ */
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+static int _update_sysc_cache(struct omap_hwmod *oh)
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+{
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+ if (!oh->sysconfig) {
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+ WARN(!oh->sysconfig, "omap_hwmod: %s: cannot read "
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+ "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
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+ return -EINVAL;
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+ }
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+
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+ /* XXX ensure module interface clock is up */
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+
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+ oh->_sysc_cache = omap_hwmod_readl(oh, oh->sysconfig->sysc_offs);
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+
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+ oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
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+ * @v: OCP_SYSCONFIG value to write
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Write @v into the module OCP_SYSCONFIG register, if it has one. No
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+ * return value.
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+ */
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+static void _write_sysconfig(u32 v, struct omap_hwmod *oh)
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+{
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+ if (!oh->sysconfig) {
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+ WARN(!oh->sysconfig, "omap_hwmod: %s: cannot write "
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+ "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
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+ return;
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+ }
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+
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+ /* XXX ensure module interface clock is up */
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+
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+ if (oh->_sysc_cache != v) {
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+ oh->_sysc_cache = v;
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+ omap_hwmod_writel(v, oh, oh->sysconfig->sysc_offs);
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+ }
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+}
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+
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+/**
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+ * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
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+ * @oh: struct omap_hwmod *
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+ * @standbymode: MIDLEMODE field bits
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+ * @v: pointer to register contents to modify
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+ *
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+ * Update the master standby mode bits in @v to be @standbymode for
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+ * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
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+ * upon error or 0 upon success.
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+ */
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+static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode,
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+ u32 *v)
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+{
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE))
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+ return -EINVAL;
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+
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+ *v &= ~SYSC_MIDLEMODE_MASK;
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+ *v |= __ffs(standbymode) << SYSC_MIDLEMODE_SHIFT;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
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+ * @oh: struct omap_hwmod *
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+ * @idlemode: SIDLEMODE field bits
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+ * @v: pointer to register contents to modify
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+ *
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+ * Update the slave idle mode bits in @v to be @idlemode for the @oh
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+ * hwmod. Does not write to the hardware. Returns -EINVAL upon error
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+ * or 0 upon success.
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+ */
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+static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v)
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+{
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE))
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+ return -EINVAL;
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+
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+ *v &= ~SYSC_SIDLEMODE_MASK;
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+ *v |= __ffs(idlemode) << SYSC_SIDLEMODE_SHIFT;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
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+ * @oh: struct omap_hwmod *
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+ * @clockact: CLOCKACTIVITY field bits
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+ * @v: pointer to register contents to modify
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+ *
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+ * Update the clockactivity mode bits in @v to be @clockact for the
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+ * @oh hwmod. Used for additional powersaving on some modules. Does
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+ * not write to the hardware. Returns -EINVAL upon error or 0 upon
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+ * success.
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+ */
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+static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v)
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+{
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
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+ return -EINVAL;
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+
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+ *v &= ~SYSC_CLOCKACTIVITY_MASK;
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+ *v |= clockact << SYSC_CLOCKACTIVITY_SHIFT;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
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+ * @oh: struct omap_hwmod *
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+ * @v: pointer to register contents to modify
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+ *
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+ * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
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+ * error or 0 upon success.
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+ */
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+static int _set_softreset(struct omap_hwmod *oh, u32 *v)
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+{
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET))
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+ return -EINVAL;
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+
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+ *v |= SYSC_SOFTRESET_MASK;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Allow the hardware module @oh to send wakeups. Returns -EINVAL
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+ * upon error or 0 upon success.
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+ */
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+static int _enable_wakeup(struct omap_hwmod *oh)
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+{
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+ u32 v;
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+
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
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+ return -EINVAL;
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+
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+ v = oh->_sysc_cache;
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+ v |= SYSC_ENAWAKEUP_MASK;
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+ _write_sysconfig(v, oh);
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+
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+ /* XXX test pwrdm_get_wken for this hwmod's subsystem */
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+
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+ oh->_int_flags |= _HWMOD_WAKEUP_ENABLED;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
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+ * upon error or 0 upon success.
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+ */
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+static int _disable_wakeup(struct omap_hwmod *oh)
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+{
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+ u32 v;
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+
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+ if (!oh->sysconfig ||
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+ !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
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+ return -EINVAL;
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+
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+ v = oh->_sysc_cache;
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+ v &= ~SYSC_ENAWAKEUP_MASK;
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+ _write_sysconfig(v, oh);
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+
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+ /* XXX test pwrdm_get_wken for this hwmod's subsystem */
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+
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+ oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED;
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+
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+ return 0;
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+}
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+
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+/**
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+ * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Prevent the hardware module @oh from entering idle while the
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+ * hardare module initiator @init_oh is active. Useful when a module
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+ * will be accessed by a particular initiator (e.g., if a module will
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+ * be accessed by the IVA, there should be a sleepdep between the IVA
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+ * initiator and the module). Only applies to modules in smart-idle
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+ * mode. Returns -EINVAL upon error or passes along
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+ * pwrdm_add_sleepdep() value upon success.
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+ */
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+static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
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+{
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+ if (!oh->_clk)
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+ return -EINVAL;
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+
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+ return pwrdm_add_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
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+ init_oh->_clk->clkdm->pwrdm.ptr);
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+}
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+
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+/**
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+ * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Allow the hardware module @oh to enter idle while the hardare
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+ * module initiator @init_oh is active. Useful when a module will not
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+ * be accessed by a particular initiator (e.g., if a module will not
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+ * be accessed by the IVA, there should be no sleepdep between the IVA
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+ * initiator and the module). Only applies to modules in smart-idle
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+ * mode. Returns -EINVAL upon error or passes along
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+ * pwrdm_add_sleepdep() value upon success.
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+ */
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+static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
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+{
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+ if (!oh->_clk)
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+ return -EINVAL;
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+
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+ return pwrdm_del_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
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+ init_oh->_clk->clkdm->pwrdm.ptr);
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+}
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+
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+/**
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+ * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Called from _init_clocks(). Populates the @oh _clk (main
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+ * functional clock pointer) if a main_clk is present. Returns 0 on
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+ * success or -EINVAL on error.
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+ */
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+static int _init_main_clk(struct omap_hwmod *oh)
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+{
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+ struct clk *c;
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+ int ret = 0;
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+
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+ if (!oh->clkdev_con_id)
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+ return 0;
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+
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+ c = clk_get_sys(oh->clkdev_dev_id, oh->clkdev_con_id);
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+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get main_clk %s.%s\n",
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+ oh->name, oh->clkdev_dev_id, oh->clkdev_con_id);
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+ if (IS_ERR(c))
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+ ret = -EINVAL;
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+ oh->_clk = c;
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+
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+ return ret;
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+}
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+
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+/**
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+ * _init_interface_clk - get a struct clk * for the the hwmod's interface clks
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Called from _init_clocks(). Populates the @oh OCP slave interface
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+ * clock pointers. Returns 0 on success or -EINVAL on error.
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+ */
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+static int _init_interface_clks(struct omap_hwmod *oh)
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+{
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+ struct omap_hwmod_ocp_if *os;
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+ struct clk *c;
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+ int i;
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+ int ret = 0;
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+
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+ if (oh->slaves_cnt == 0)
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+ return 0;
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+
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+ for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
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+ if (!os->clkdev_con_id)
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+ continue;
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+
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+ c = clk_get_sys(os->clkdev_dev_id, os->clkdev_con_id);
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+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get "
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+ "interface_clk %s.%s\n", oh->name,
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+ os->clkdev_dev_id, os->clkdev_con_id);
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+ if (IS_ERR(c))
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+ ret = -EINVAL;
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+ os->_clk = c;
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+ }
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+
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+ return ret;
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+}
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+
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+/**
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+ * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
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+ * @oh: struct omap_hwmod *
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+ *
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+ * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
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+ * clock pointers. Returns 0 on success or -EINVAL on error.
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+ */
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+static int _init_opt_clks(struct omap_hwmod *oh)
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+{
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+ struct omap_hwmod_opt_clk *oc;
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+ struct clk *c;
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+ int i;
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+ int ret = 0;
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+
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+ for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) {
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+ c = clk_get_sys(oc->clkdev_dev_id, oc->clkdev_con_id);
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+ WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get opt_clk "
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+ "%s.%s\n", oh->name, oc->clkdev_dev_id,
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+ oc->clkdev_con_id);
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+ if (IS_ERR(c))
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+ ret = -EINVAL;
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+ oc->_clk = c;
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+ }
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+
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+ return ret;
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+}
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+
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+/**
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|
+ * _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, c);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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;
|
|
|
+}
|
Tony Lindgren