2 * omap_hwmod implementation for OMAP2/3/4
4 * Copyright (C) 2009-2011 Nokia Corporation
5 * Copyright (C) 2011-2012 Texas Instruments, Inc.
7 * Paul Walmsley, BenoƮt Cousson, Kevin Hilman
9 * Created in collaboration with (alphabetical order): Thara Gopinath,
10 * Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari Poussa, Anand
11 * Sawant, Santosh Shilimkar, Richard Woodruff
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
19 * One way to view an OMAP SoC is as a collection of largely unrelated
20 * IP blocks connected by interconnects. The IP blocks include
21 * devices such as ARM processors, audio serial interfaces, UARTs,
22 * etc. Some of these devices, like the DSP, are created by TI;
23 * others, like the SGX, largely originate from external vendors. In
24 * TI's documentation, on-chip devices are referred to as "OMAP
25 * modules." Some of these IP blocks are identical across several
26 * OMAP versions. Others are revised frequently.
28 * These OMAP modules are tied together by various interconnects.
29 * Most of the address and data flow between modules is via OCP-based
30 * interconnects such as the L3 and L4 buses; but there are other
31 * interconnects that distribute the hardware clock tree, handle idle
32 * and reset signaling, supply power, and connect the modules to
33 * various pads or balls on the OMAP package.
35 * OMAP hwmod provides a consistent way to describe the on-chip
36 * hardware blocks and their integration into the rest of the chip.
37 * This description can be automatically generated from the TI
38 * hardware database. OMAP hwmod provides a standard, consistent API
39 * to reset, enable, idle, and disable these hardware blocks. And
40 * hwmod provides a way for other core code, such as the Linux device
41 * code or the OMAP power management and address space mapping code,
42 * to query the hardware database.
46 * Drivers won't call hwmod functions directly. That is done by the
47 * omap_device code, and in rare occasions, by custom integration code
48 * in arch/arm/ *omap*. The omap_device code includes functions to
49 * build a struct platform_device using omap_hwmod data, and that is
50 * currently how hwmod data is communicated to drivers and to the
51 * Linux driver model. Most drivers will call omap_hwmod functions only
52 * indirectly, via pm_runtime*() functions.
54 * From a layering perspective, here is where the OMAP hwmod code
55 * fits into the kernel software stack:
57 * +-------------------------------+
58 * | Device driver code |
59 * | (e.g., drivers/) |
60 * +-------------------------------+
61 * | Linux driver model |
62 * | (platform_device / |
63 * | platform_driver data/code) |
64 * +-------------------------------+
65 * | OMAP core-driver integration |
66 * |(arch/arm/mach-omap2/devices.c)|
67 * +-------------------------------+
68 * | omap_device code |
69 * | (../plat-omap/omap_device.c) |
70 * +-------------------------------+
71 * ----> | omap_hwmod code/data | <-----
72 * | (../mach-omap2/omap_hwmod*) |
73 * +-------------------------------+
74 * | OMAP clock/PRCM/register fns |
75 * | ({read,write}l_relaxed, clk*) |
76 * +-------------------------------+
78 * Device drivers should not contain any OMAP-specific code or data in
79 * them. They should only contain code to operate the IP block that
80 * the driver is responsible for. This is because these IP blocks can
81 * also appear in other SoCs, either from TI (such as DaVinci) or from
82 * other manufacturers; and drivers should be reusable across other
85 * The OMAP hwmod code also will attempt to reset and idle all on-chip
86 * devices upon boot. The goal here is for the kernel to be
87 * completely self-reliant and independent from bootloaders. This is
88 * to ensure a repeatable configuration, both to ensure consistent
89 * runtime behavior, and to make it easier for others to reproduce
92 * OMAP module activity states
93 * ---------------------------
94 * The hwmod code considers modules to be in one of several activity
95 * states. IP blocks start out in an UNKNOWN state, then once they
96 * are registered via the hwmod code, proceed to the REGISTERED state.
97 * Once their clock names are resolved to clock pointers, the module
98 * enters the CLKS_INITED state; and finally, once the module has been
99 * reset and the integration registers programmed, the INITIALIZED state
100 * is entered. The hwmod code will then place the module into either
101 * the IDLE state to save power, or in the case of a critical system
102 * module, the ENABLED state.
104 * OMAP core integration code can then call omap_hwmod*() functions
105 * directly to move the module between the IDLE, ENABLED, and DISABLED
106 * states, as needed. This is done during both the PM idle loop, and
107 * in the OMAP core integration code's implementation of the PM runtime
112 * This is a partial list.
113 * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
114 * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
115 * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
116 * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
117 * - Open Core Protocol Specification 2.2
120 * - handle IO mapping
121 * - bus throughput & module latency measurement code
123 * XXX add tests at the beginning of each function to ensure the hwmod is
124 * in the appropriate state
125 * XXX error return values should be checked to ensure that they are
130 #include <linux/kernel.h>
131 #include <linux/errno.h>
132 #include <linux/io.h>
133 #include <linux/clk.h>
134 #include <linux/clk-provider.h>
135 #include <linux/delay.h>
136 #include <linux/err.h>
137 #include <linux/list.h>
138 #include <linux/mutex.h>
139 #include <linux/spinlock.h>
140 #include <linux/slab.h>
141 #include <linux/bootmem.h>
142 #include <linux/cpu.h>
143 #include <linux/of.h>
144 #include <linux/of_address.h>
146 #include <asm/system_misc.h>
149 #include "omap_hwmod.h"
153 #include "clockdomain.h"
154 #include "powerdomain.h"
162 #include "prminst44xx.h"
166 /* Name of the OMAP hwmod for the MPU */
167 #define MPU_INITIATOR_NAME "mpu"
170 * Number of struct omap_hwmod_link records per struct
171 * omap_hwmod_ocp_if record (master->slave and slave->master)
173 #define LINKS_PER_OCP_IF 2
176 * Address offset (in bytes) between the reset control and the reset
177 * status registers: 4 bytes on OMAP4
179 #define OMAP4_RST_CTRL_ST_OFFSET 4
182 * struct omap_hwmod_soc_ops - fn ptrs for some SoC-specific operations
183 * @enable_module: function to enable a module (via MODULEMODE)
184 * @disable_module: function to disable a module (via MODULEMODE)
186 * XXX Eventually this functionality will be hidden inside the PRM/CM
187 * device drivers. Until then, this should avoid huge blocks of cpu_is_*()
188 * conditionals in this code.
190 struct omap_hwmod_soc_ops {
191 void (*enable_module)(struct omap_hwmod *oh);
192 int (*disable_module)(struct omap_hwmod *oh);
193 int (*wait_target_ready)(struct omap_hwmod *oh);
194 int (*assert_hardreset)(struct omap_hwmod *oh,
195 struct omap_hwmod_rst_info *ohri);
196 int (*deassert_hardreset)(struct omap_hwmod *oh,
197 struct omap_hwmod_rst_info *ohri);
198 int (*is_hardreset_asserted)(struct omap_hwmod *oh,
199 struct omap_hwmod_rst_info *ohri);
200 int (*init_clkdm)(struct omap_hwmod *oh);
201 void (*update_context_lost)(struct omap_hwmod *oh);
202 int (*get_context_lost)(struct omap_hwmod *oh);
205 /* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */
206 static struct omap_hwmod_soc_ops soc_ops;
208 /* omap_hwmod_list contains all registered struct omap_hwmods */
209 static LIST_HEAD(omap_hwmod_list);
211 /* mpu_oh: used to add/remove MPU initiator from sleepdep list */
212 static struct omap_hwmod *mpu_oh;
214 /* io_chain_lock: used to serialize reconfigurations of the I/O chain */
215 static DEFINE_SPINLOCK(io_chain_lock);
218 * linkspace: ptr to a buffer that struct omap_hwmod_link records are
219 * allocated from - used to reduce the number of small memory
220 * allocations, which has a significant impact on performance
222 static struct omap_hwmod_link *linkspace;
225 * free_ls, max_ls: array indexes into linkspace; representing the
226 * next free struct omap_hwmod_link index, and the maximum number of
227 * struct omap_hwmod_link records allocated (respectively)
229 static unsigned short free_ls, max_ls, ls_supp;
231 /* inited: set to true once the hwmod code is initialized */
234 /* Private functions */
237 * _fetch_next_ocp_if - return the next OCP interface in a list
238 * @p: ptr to a ptr to the list_head inside the ocp_if to return
239 * @i: pointer to the index of the element pointed to by @p in the list
241 * Return a pointer to the struct omap_hwmod_ocp_if record
242 * containing the struct list_head pointed to by @p, and increment
243 * @p such that a future call to this routine will return the next
246 static struct omap_hwmod_ocp_if *_fetch_next_ocp_if(struct list_head **p,
249 struct omap_hwmod_ocp_if *oi;
251 oi = list_entry(*p, struct omap_hwmod_link, node)->ocp_if;
260 * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
261 * @oh: struct omap_hwmod *
263 * Load the current value of the hwmod OCP_SYSCONFIG register into the
264 * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
265 * OCP_SYSCONFIG register or 0 upon success.
267 static int _update_sysc_cache(struct omap_hwmod *oh)
269 if (!oh->class->sysc) {
270 WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name);
274 /* XXX ensure module interface clock is up */
276 oh->_sysc_cache = omap_hwmod_read(oh, oh->class->sysc->sysc_offs);
278 if (!(oh->class->sysc->sysc_flags & SYSC_NO_CACHE))
279 oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED;
285 * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
286 * @v: OCP_SYSCONFIG value to write
287 * @oh: struct omap_hwmod *
289 * Write @v into the module class' OCP_SYSCONFIG register, if it has
290 * one. No return value.
292 static void _write_sysconfig(u32 v, struct omap_hwmod *oh)
294 if (!oh->class->sysc) {
295 WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name);
299 /* XXX ensure module interface clock is up */
301 /* Module might have lost context, always update cache and register */
305 * Some IP blocks (such as RTC) require unlocking of IP before
306 * accessing its registers. If a function pointer is present
307 * to unlock, then call it before accessing sysconfig and
308 * call lock after writing sysconfig.
310 if (oh->class->unlock)
311 oh->class->unlock(oh);
313 omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs);
320 * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
321 * @oh: struct omap_hwmod *
322 * @standbymode: MIDLEMODE field bits
323 * @v: pointer to register contents to modify
325 * Update the master standby mode bits in @v to be @standbymode for
326 * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
327 * upon error or 0 upon success.
329 static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode,
335 if (!oh->class->sysc ||
336 !(oh->class->sysc->sysc_flags & SYSC_HAS_MIDLEMODE))
339 if (!oh->class->sysc->sysc_fields) {
340 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
344 mstandby_shift = oh->class->sysc->sysc_fields->midle_shift;
345 mstandby_mask = (0x3 << mstandby_shift);
347 *v &= ~mstandby_mask;
348 *v |= __ffs(standbymode) << mstandby_shift;
354 * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
355 * @oh: struct omap_hwmod *
356 * @idlemode: SIDLEMODE field bits
357 * @v: pointer to register contents to modify
359 * Update the slave idle mode bits in @v to be @idlemode for the @oh
360 * hwmod. Does not write to the hardware. Returns -EINVAL upon error
363 static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v)
368 if (!oh->class->sysc ||
369 !(oh->class->sysc->sysc_flags & SYSC_HAS_SIDLEMODE))
372 if (!oh->class->sysc->sysc_fields) {
373 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
377 sidle_shift = oh->class->sysc->sysc_fields->sidle_shift;
378 sidle_mask = (0x3 << sidle_shift);
381 *v |= __ffs(idlemode) << sidle_shift;
387 * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
388 * @oh: struct omap_hwmod *
389 * @clockact: CLOCKACTIVITY field bits
390 * @v: pointer to register contents to modify
392 * Update the clockactivity mode bits in @v to be @clockact for the
393 * @oh hwmod. Used for additional powersaving on some modules. Does
394 * not write to the hardware. Returns -EINVAL upon error or 0 upon
397 static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v)
402 if (!oh->class->sysc ||
403 !(oh->class->sysc->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
406 if (!oh->class->sysc->sysc_fields) {
407 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
411 clkact_shift = oh->class->sysc->sysc_fields->clkact_shift;
412 clkact_mask = (0x3 << clkact_shift);
415 *v |= clockact << clkact_shift;
421 * _set_softreset: set OCP_SYSCONFIG.SOFTRESET bit in @v
422 * @oh: struct omap_hwmod *
423 * @v: pointer to register contents to modify
425 * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
426 * error or 0 upon success.
428 static int _set_softreset(struct omap_hwmod *oh, u32 *v)
432 if (!oh->class->sysc ||
433 !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
436 if (!oh->class->sysc->sysc_fields) {
437 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
441 softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift);
449 * _clear_softreset: clear OCP_SYSCONFIG.SOFTRESET bit in @v
450 * @oh: struct omap_hwmod *
451 * @v: pointer to register contents to modify
453 * Clear the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
454 * error or 0 upon success.
456 static int _clear_softreset(struct omap_hwmod *oh, u32 *v)
460 if (!oh->class->sysc ||
461 !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
464 if (!oh->class->sysc->sysc_fields) {
466 "omap_hwmod: %s: sysc_fields absent for sysconfig class\n",
471 softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift);
479 * _wait_softreset_complete - wait for an OCP softreset to complete
480 * @oh: struct omap_hwmod * to wait on
482 * Wait until the IP block represented by @oh reports that its OCP
483 * softreset is complete. This can be triggered by software (see
484 * _ocp_softreset()) or by hardware upon returning from off-mode (one
485 * example is HSMMC). Waits for up to MAX_MODULE_SOFTRESET_WAIT
486 * microseconds. Returns the number of microseconds waited.
488 static int _wait_softreset_complete(struct omap_hwmod *oh)
490 struct omap_hwmod_class_sysconfig *sysc;
494 sysc = oh->class->sysc;
496 if (sysc->sysc_flags & SYSS_HAS_RESET_STATUS)
497 omap_test_timeout((omap_hwmod_read(oh, sysc->syss_offs)
498 & SYSS_RESETDONE_MASK),
499 MAX_MODULE_SOFTRESET_WAIT, c);
500 else if (sysc->sysc_flags & SYSC_HAS_RESET_STATUS) {
501 softrst_mask = (0x1 << sysc->sysc_fields->srst_shift);
502 omap_test_timeout(!(omap_hwmod_read(oh, sysc->sysc_offs)
504 MAX_MODULE_SOFTRESET_WAIT, c);
511 * _set_dmadisable: set OCP_SYSCONFIG.DMADISABLE bit in @v
512 * @oh: struct omap_hwmod *
514 * The DMADISABLE bit is a semi-automatic bit present in sysconfig register
515 * of some modules. When the DMA must perform read/write accesses, the
516 * DMADISABLE bit is cleared by the hardware. But when the DMA must stop
517 * for power management, software must set the DMADISABLE bit back to 1.
519 * Set the DMADISABLE bit in @v for hwmod @oh. Returns -EINVAL upon
520 * error or 0 upon success.
522 static int _set_dmadisable(struct omap_hwmod *oh)
527 if (!oh->class->sysc ||
528 !(oh->class->sysc->sysc_flags & SYSC_HAS_DMADISABLE))
531 if (!oh->class->sysc->sysc_fields) {
532 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
536 /* clocks must be on for this operation */
537 if (oh->_state != _HWMOD_STATE_ENABLED) {
538 pr_warn("omap_hwmod: %s: dma can be disabled only from enabled state\n", oh->name);
542 pr_debug("omap_hwmod: %s: setting DMADISABLE\n", oh->name);
546 (0x1 << oh->class->sysc->sysc_fields->dmadisable_shift);
547 v |= dmadisable_mask;
548 _write_sysconfig(v, oh);
554 * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v
555 * @oh: struct omap_hwmod *
556 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
557 * @v: pointer to register contents to modify
559 * Update the module autoidle bit in @v to be @autoidle for the @oh
560 * hwmod. The autoidle bit controls whether the module can gate
561 * internal clocks automatically when it isn't doing anything; the
562 * exact function of this bit varies on a per-module basis. This
563 * function does not write to the hardware. Returns -EINVAL upon
564 * error or 0 upon success.
566 static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle,
572 if (!oh->class->sysc ||
573 !(oh->class->sysc->sysc_flags & SYSC_HAS_AUTOIDLE))
576 if (!oh->class->sysc->sysc_fields) {
577 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
581 autoidle_shift = oh->class->sysc->sysc_fields->autoidle_shift;
582 autoidle_mask = (0x1 << autoidle_shift);
584 *v &= ~autoidle_mask;
585 *v |= autoidle << autoidle_shift;
591 * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux
592 * @oh: struct omap_hwmod *
593 * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable
595 * Set or clear the I/O pad wakeup flag in the mux entries for the
596 * hwmod @oh. This function changes the @oh->mux->pads_dynamic array
597 * in memory. If the hwmod is currently idled, and the new idle
598 * values don't match the previous ones, this function will also
599 * update the SCM PADCTRL registers. Otherwise, if the hwmod is not
600 * currently idled, this function won't touch the hardware: the new
601 * mux settings are written to the SCM PADCTRL registers when the
602 * hwmod is idled. No return value.
604 static void _set_idle_ioring_wakeup(struct omap_hwmod *oh, bool set_wake)
606 struct omap_device_pad *pad;
611 if (!oh->mux || !oh->mux->enabled)
614 for (j = 0; j < oh->mux->nr_pads_dynamic; j++) {
615 pad = oh->mux->pads_dynamic[j];
617 if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP))
620 prev_idle = pad->idle;
623 pad->idle |= OMAP_WAKEUP_EN;
625 pad->idle &= ~OMAP_WAKEUP_EN;
627 if (prev_idle != pad->idle)
631 if (change && oh->_state == _HWMOD_STATE_IDLE)
632 omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);
636 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
637 * @oh: struct omap_hwmod *
639 * Allow the hardware module @oh to send wakeups. Returns -EINVAL
640 * upon error or 0 upon success.
642 static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
644 if (!oh->class->sysc ||
645 !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
646 (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
647 (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
650 if (!oh->class->sysc->sysc_fields) {
651 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
655 if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
656 *v |= 0x1 << oh->class->sysc->sysc_fields->enwkup_shift;
658 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
659 _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
660 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
661 _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
663 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
669 * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
670 * @oh: struct omap_hwmod *
672 * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
673 * upon error or 0 upon success.
675 static int _disable_wakeup(struct omap_hwmod *oh, u32 *v)
677 if (!oh->class->sysc ||
678 !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
679 (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
680 (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
683 if (!oh->class->sysc->sysc_fields) {
684 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
688 if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
689 *v &= ~(0x1 << oh->class->sysc->sysc_fields->enwkup_shift);
691 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
692 _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v);
693 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
694 _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART, v);
696 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
701 static struct clockdomain *_get_clkdm(struct omap_hwmod *oh)
703 struct clk_hw_omap *clk;
707 } else if (oh->_clk) {
708 if (__clk_get_flags(oh->_clk) & CLK_IS_BASIC)
710 clk = to_clk_hw_omap(__clk_get_hw(oh->_clk));
717 * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
718 * @oh: struct omap_hwmod *
720 * Prevent the hardware module @oh from entering idle while the
721 * hardare module initiator @init_oh is active. Useful when a module
722 * will be accessed by a particular initiator (e.g., if a module will
723 * be accessed by the IVA, there should be a sleepdep between the IVA
724 * initiator and the module). Only applies to modules in smart-idle
725 * mode. If the clockdomain is marked as not needing autodeps, return
726 * 0 without doing anything. Otherwise, returns -EINVAL upon error or
727 * passes along clkdm_add_sleepdep() value upon success.
729 static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
731 struct clockdomain *clkdm, *init_clkdm;
733 clkdm = _get_clkdm(oh);
734 init_clkdm = _get_clkdm(init_oh);
736 if (!clkdm || !init_clkdm)
739 if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS)
742 return clkdm_add_sleepdep(clkdm, init_clkdm);
746 * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
747 * @oh: struct omap_hwmod *
749 * Allow the hardware module @oh to enter idle while the hardare
750 * module initiator @init_oh is active. Useful when a module will not
751 * be accessed by a particular initiator (e.g., if a module will not
752 * be accessed by the IVA, there should be no sleepdep between the IVA
753 * initiator and the module). Only applies to modules in smart-idle
754 * mode. If the clockdomain is marked as not needing autodeps, return
755 * 0 without doing anything. Returns -EINVAL upon error or passes
756 * along clkdm_del_sleepdep() value upon success.
758 static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
760 struct clockdomain *clkdm, *init_clkdm;
762 clkdm = _get_clkdm(oh);
763 init_clkdm = _get_clkdm(init_oh);
765 if (!clkdm || !init_clkdm)
768 if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS)
771 return clkdm_del_sleepdep(clkdm, init_clkdm);
775 * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
776 * @oh: struct omap_hwmod *
778 * Called from _init_clocks(). Populates the @oh _clk (main
779 * functional clock pointer) if a main_clk is present. Returns 0 on
780 * success or -EINVAL on error.
782 static int _init_main_clk(struct omap_hwmod *oh)
789 oh->_clk = clk_get(NULL, oh->main_clk);
790 if (IS_ERR(oh->_clk)) {
791 pr_warn("omap_hwmod: %s: cannot clk_get main_clk %s\n",
792 oh->name, oh->main_clk);
796 * HACK: This needs a re-visit once clk_prepare() is implemented
797 * to do something meaningful. Today its just a no-op.
798 * If clk_prepare() is used at some point to do things like
799 * voltage scaling etc, then this would have to be moved to
800 * some point where subsystems like i2c and pmic become
803 clk_prepare(oh->_clk);
806 pr_debug("omap_hwmod: %s: missing clockdomain for %s.\n",
807 oh->name, oh->main_clk);
813 * _init_interface_clks - get a struct clk * for the the hwmod's interface clks
814 * @oh: struct omap_hwmod *
816 * Called from _init_clocks(). Populates the @oh OCP slave interface
817 * clock pointers. Returns 0 on success or -EINVAL on error.
819 static int _init_interface_clks(struct omap_hwmod *oh)
821 struct omap_hwmod_ocp_if *os;
827 p = oh->slave_ports.next;
829 while (i < oh->slaves_cnt) {
830 os = _fetch_next_ocp_if(&p, &i);
834 c = clk_get(NULL, os->clk);
836 pr_warn("omap_hwmod: %s: cannot clk_get interface_clk %s\n",
843 * HACK: This needs a re-visit once clk_prepare() is implemented
844 * to do something meaningful. Today its just a no-op.
845 * If clk_prepare() is used at some point to do things like
846 * voltage scaling etc, then this would have to be moved to
847 * some point where subsystems like i2c and pmic become
850 clk_prepare(os->_clk);
857 * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
858 * @oh: struct omap_hwmod *
860 * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
861 * clock pointers. Returns 0 on success or -EINVAL on error.
863 static int _init_opt_clks(struct omap_hwmod *oh)
865 struct omap_hwmod_opt_clk *oc;
870 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) {
871 c = clk_get(NULL, oc->clk);
873 pr_warn("omap_hwmod: %s: cannot clk_get opt_clk %s\n",
880 * HACK: This needs a re-visit once clk_prepare() is implemented
881 * to do something meaningful. Today its just a no-op.
882 * If clk_prepare() is used at some point to do things like
883 * voltage scaling etc, then this would have to be moved to
884 * some point where subsystems like i2c and pmic become
887 clk_prepare(oc->_clk);
893 static void _enable_optional_clocks(struct omap_hwmod *oh)
895 struct omap_hwmod_opt_clk *oc;
898 pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name);
900 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
902 pr_debug("omap_hwmod: enable %s:%s\n", oc->role,
903 __clk_get_name(oc->_clk));
904 clk_enable(oc->_clk);
908 static void _disable_optional_clocks(struct omap_hwmod *oh)
910 struct omap_hwmod_opt_clk *oc;
913 pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name);
915 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
917 pr_debug("omap_hwmod: disable %s:%s\n", oc->role,
918 __clk_get_name(oc->_clk));
919 clk_disable(oc->_clk);
924 * _enable_clocks - enable hwmod main clock and interface clocks
925 * @oh: struct omap_hwmod *
927 * Enables all clocks necessary for register reads and writes to succeed
928 * on the hwmod @oh. Returns 0.
930 static int _enable_clocks(struct omap_hwmod *oh)
932 struct omap_hwmod_ocp_if *os;
936 pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
939 clk_enable(oh->_clk);
941 p = oh->slave_ports.next;
943 while (i < oh->slaves_cnt) {
944 os = _fetch_next_ocp_if(&p, &i);
946 if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
947 clk_enable(os->_clk);
950 if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
951 _enable_optional_clocks(oh);
953 /* The opt clocks are controlled by the device driver. */
959 * _disable_clocks - disable hwmod main clock and interface clocks
960 * @oh: struct omap_hwmod *
962 * Disables the hwmod @oh main functional and interface clocks. Returns 0.
964 static int _disable_clocks(struct omap_hwmod *oh)
966 struct omap_hwmod_ocp_if *os;
970 pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name);
973 clk_disable(oh->_clk);
975 p = oh->slave_ports.next;
977 while (i < oh->slaves_cnt) {
978 os = _fetch_next_ocp_if(&p, &i);
980 if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
981 clk_disable(os->_clk);
984 if (oh->flags & HWMOD_OPT_CLKS_NEEDED)
985 _disable_optional_clocks(oh);
987 /* The opt clocks are controlled by the device driver. */
993 * _omap4_enable_module - enable CLKCTRL modulemode on OMAP4
994 * @oh: struct omap_hwmod *
996 * Enables the PRCM module mode related to the hwmod @oh.
999 static void _omap4_enable_module(struct omap_hwmod *oh)
1001 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
1004 pr_debug("omap_hwmod: %s: %s: %d\n",
1005 oh->name, __func__, oh->prcm.omap4.modulemode);
1007 omap_cm_module_enable(oh->prcm.omap4.modulemode,
1008 oh->clkdm->prcm_partition,
1009 oh->clkdm->cm_inst, oh->prcm.omap4.clkctrl_offs);
1013 * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4
1014 * @oh: struct omap_hwmod *
1016 * Wait for a module @oh to enter slave idle. Returns 0 if the module
1017 * does not have an IDLEST bit or if the module successfully enters
1018 * slave idle; otherwise, pass along the return value of the
1019 * appropriate *_cm*_wait_module_idle() function.
1021 static int _omap4_wait_target_disable(struct omap_hwmod *oh)
1026 if (oh->_int_flags & _HWMOD_NO_MPU_PORT || !oh->clkdm)
1029 if (oh->flags & HWMOD_NO_IDLEST)
1032 return omap_cm_wait_module_idle(oh->clkdm->prcm_partition,
1034 oh->prcm.omap4.clkctrl_offs, 0);
1038 * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh
1039 * @oh: struct omap_hwmod *oh
1041 * Count and return the number of MPU IRQs associated with the hwmod
1042 * @oh. Used to allocate struct resource data. Returns 0 if @oh is
1045 static int _count_mpu_irqs(struct omap_hwmod *oh)
1047 struct omap_hwmod_irq_info *ohii;
1050 if (!oh || !oh->mpu_irqs)
1054 ohii = &oh->mpu_irqs[i++];
1055 } while (ohii->irq != -1);
1061 * _count_sdma_reqs - count the number of SDMA request lines associated with @oh
1062 * @oh: struct omap_hwmod *oh
1064 * Count and return the number of SDMA request lines associated with
1065 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1068 static int _count_sdma_reqs(struct omap_hwmod *oh)
1070 struct omap_hwmod_dma_info *ohdi;
1073 if (!oh || !oh->sdma_reqs)
1077 ohdi = &oh->sdma_reqs[i++];
1078 } while (ohdi->dma_req != -1);
1084 * _count_ocp_if_addr_spaces - count the number of address space entries for @oh
1085 * @oh: struct omap_hwmod *oh
1087 * Count and return the number of address space ranges associated with
1088 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1091 static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os)
1093 struct omap_hwmod_addr_space *mem;
1096 if (!os || !os->addr)
1100 mem = &os->addr[i++];
1101 } while (mem->pa_start != mem->pa_end);
1107 * _get_mpu_irq_by_name - fetch MPU interrupt line number by name
1108 * @oh: struct omap_hwmod * to operate on
1109 * @name: pointer to the name of the MPU interrupt number to fetch (optional)
1110 * @irq: pointer to an unsigned int to store the MPU IRQ number to
1112 * Retrieve a MPU hardware IRQ line number named by @name associated
1113 * with the IP block pointed to by @oh. The IRQ number will be filled
1114 * into the address pointed to by @dma. When @name is non-null, the
1115 * IRQ line number associated with the named entry will be returned.
1116 * If @name is null, the first matching entry will be returned. Data
1117 * order is not meaningful in hwmod data, so callers are strongly
1118 * encouraged to use a non-null @name whenever possible to avoid
1119 * unpredictable effects if hwmod data is later added that causes data
1120 * ordering to change. Returns 0 upon success or a negative error
1123 static int _get_mpu_irq_by_name(struct omap_hwmod *oh, const char *name,
1133 while (oh->mpu_irqs[i].irq != -1) {
1134 if (name == oh->mpu_irqs[i].name ||
1135 !strcmp(name, oh->mpu_irqs[i].name)) {
1145 *irq = oh->mpu_irqs[i].irq;
1151 * _get_sdma_req_by_name - fetch SDMA request line ID by name
1152 * @oh: struct omap_hwmod * to operate on
1153 * @name: pointer to the name of the SDMA request line to fetch (optional)
1154 * @dma: pointer to an unsigned int to store the request line ID to
1156 * Retrieve an SDMA request line ID named by @name on the IP block
1157 * pointed to by @oh. The ID will be filled into the address pointed
1158 * to by @dma. When @name is non-null, the request line ID associated
1159 * with the named entry will be returned. If @name is null, the first
1160 * matching entry will be returned. Data order is not meaningful in
1161 * hwmod data, so callers are strongly encouraged to use a non-null
1162 * @name whenever possible to avoid unpredictable effects if hwmod
1163 * data is later added that causes data ordering to change. Returns 0
1164 * upon success or a negative error code upon error.
1166 static int _get_sdma_req_by_name(struct omap_hwmod *oh, const char *name,
1176 while (oh->sdma_reqs[i].dma_req != -1) {
1177 if (name == oh->sdma_reqs[i].name ||
1178 !strcmp(name, oh->sdma_reqs[i].name)) {
1188 *dma = oh->sdma_reqs[i].dma_req;
1194 * _get_addr_space_by_name - fetch address space start & end by name
1195 * @oh: struct omap_hwmod * to operate on
1196 * @name: pointer to the name of the address space to fetch (optional)
1197 * @pa_start: pointer to a u32 to store the starting address to
1198 * @pa_end: pointer to a u32 to store the ending address to
1200 * Retrieve address space start and end addresses for the IP block
1201 * pointed to by @oh. The data will be filled into the addresses
1202 * pointed to by @pa_start and @pa_end. When @name is non-null, the
1203 * address space data associated with the named entry will be
1204 * returned. If @name is null, the first matching entry will be
1205 * returned. Data order is not meaningful in hwmod data, so callers
1206 * are strongly encouraged to use a non-null @name whenever possible
1207 * to avoid unpredictable effects if hwmod data is later added that
1208 * causes data ordering to change. Returns 0 upon success or a
1209 * negative error code upon error.
1211 static int _get_addr_space_by_name(struct omap_hwmod *oh, const char *name,
1212 u32 *pa_start, u32 *pa_end)
1215 struct omap_hwmod_ocp_if *os;
1216 struct list_head *p = NULL;
1219 p = oh->slave_ports.next;
1222 while (i < oh->slaves_cnt) {
1223 os = _fetch_next_ocp_if(&p, &i);
1229 while (os->addr[j].pa_start != os->addr[j].pa_end) {
1230 if (name == os->addr[j].name ||
1231 !strcmp(name, os->addr[j].name)) {
1245 *pa_start = os->addr[j].pa_start;
1246 *pa_end = os->addr[j].pa_end;
1252 * _save_mpu_port_index - find and save the index to @oh's MPU port
1253 * @oh: struct omap_hwmod *
1255 * Determines the array index of the OCP slave port that the MPU uses
1256 * to address the device, and saves it into the struct omap_hwmod.
1257 * Intended to be called during hwmod registration only. No return
1260 static void __init _save_mpu_port_index(struct omap_hwmod *oh)
1262 struct omap_hwmod_ocp_if *os = NULL;
1263 struct list_head *p;
1269 oh->_int_flags |= _HWMOD_NO_MPU_PORT;
1271 p = oh->slave_ports.next;
1273 while (i < oh->slaves_cnt) {
1274 os = _fetch_next_ocp_if(&p, &i);
1275 if (os->user & OCP_USER_MPU) {
1277 oh->_int_flags &= ~_HWMOD_NO_MPU_PORT;
1286 * _find_mpu_rt_port - return omap_hwmod_ocp_if accessible by the MPU
1287 * @oh: struct omap_hwmod *
1289 * Given a pointer to a struct omap_hwmod record @oh, return a pointer
1290 * to the struct omap_hwmod_ocp_if record that is used by the MPU to
1291 * communicate with the IP block. This interface need not be directly
1292 * connected to the MPU (and almost certainly is not), but is directly
1293 * connected to the IP block represented by @oh. Returns a pointer
1294 * to the struct omap_hwmod_ocp_if * upon success, or returns NULL upon
1295 * error or if there does not appear to be a path from the MPU to this
1298 static struct omap_hwmod_ocp_if *_find_mpu_rt_port(struct omap_hwmod *oh)
1300 if (!oh || oh->_int_flags & _HWMOD_NO_MPU_PORT || oh->slaves_cnt == 0)
1303 return oh->_mpu_port;
1307 * _find_mpu_rt_addr_space - return MPU register target address space for @oh
1308 * @oh: struct omap_hwmod *
1310 * Returns a pointer to the struct omap_hwmod_addr_space record representing
1311 * the register target MPU address space; or returns NULL upon error.
1313 static struct omap_hwmod_addr_space * __init _find_mpu_rt_addr_space(struct omap_hwmod *oh)
1315 struct omap_hwmod_ocp_if *os;
1316 struct omap_hwmod_addr_space *mem;
1317 int found = 0, i = 0;
1319 os = _find_mpu_rt_port(oh);
1320 if (!os || !os->addr)
1324 mem = &os->addr[i++];
1325 if (mem->flags & ADDR_TYPE_RT)
1327 } while (!found && mem->pa_start != mem->pa_end);
1329 return (found) ? mem : NULL;
1333 * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG
1334 * @oh: struct omap_hwmod *
1336 * Ensure that the OCP_SYSCONFIG register for the IP block represented
1337 * by @oh is set to indicate to the PRCM that the IP block is active.
1338 * Usually this means placing the module into smart-idle mode and
1339 * smart-standby, but if there is a bug in the automatic idle handling
1340 * for the IP block, it may need to be placed into the force-idle or
1341 * no-idle variants of these modes. No return value.
1343 static void _enable_sysc(struct omap_hwmod *oh)
1348 struct clockdomain *clkdm;
1350 if (!oh->class->sysc)
1354 * Wait until reset has completed, this is needed as the IP
1355 * block is reset automatically by hardware in some cases
1356 * (off-mode for example), and the drivers require the
1357 * IP to be ready when they access it
1359 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1360 _enable_optional_clocks(oh);
1361 _wait_softreset_complete(oh);
1362 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1363 _disable_optional_clocks(oh);
1365 v = oh->_sysc_cache;
1366 sf = oh->class->sysc->sysc_flags;
1368 clkdm = _get_clkdm(oh);
1369 if (sf & SYSC_HAS_SIDLEMODE) {
1370 if (oh->flags & HWMOD_SWSUP_SIDLE ||
1371 oh->flags & HWMOD_SWSUP_SIDLE_ACT) {
1372 idlemode = HWMOD_IDLEMODE_NO;
1374 if (sf & SYSC_HAS_ENAWAKEUP)
1375 _enable_wakeup(oh, &v);
1376 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
1377 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1379 idlemode = HWMOD_IDLEMODE_SMART;
1383 * This is special handling for some IPs like
1384 * 32k sync timer. Force them to idle!
1386 clkdm_act = (clkdm && clkdm->flags & CLKDM_ACTIVE_WITH_MPU);
1387 if (clkdm_act && !(oh->class->sysc->idlemodes &
1388 (SIDLE_SMART | SIDLE_SMART_WKUP)))
1389 idlemode = HWMOD_IDLEMODE_FORCE;
1391 _set_slave_idlemode(oh, idlemode, &v);
1394 if (sf & SYSC_HAS_MIDLEMODE) {
1395 if (oh->flags & HWMOD_FORCE_MSTANDBY) {
1396 idlemode = HWMOD_IDLEMODE_FORCE;
1397 } else if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
1398 idlemode = HWMOD_IDLEMODE_NO;
1400 if (sf & SYSC_HAS_ENAWAKEUP)
1401 _enable_wakeup(oh, &v);
1402 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
1403 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1405 idlemode = HWMOD_IDLEMODE_SMART;
1407 _set_master_standbymode(oh, idlemode, &v);
1411 * XXX The clock framework should handle this, by
1412 * calling into this code. But this must wait until the
1413 * clock structures are tagged with omap_hwmod entries
1415 if ((oh->flags & HWMOD_SET_DEFAULT_CLOCKACT) &&
1416 (sf & SYSC_HAS_CLOCKACTIVITY))
1417 _set_clockactivity(oh, oh->class->sysc->clockact, &v);
1419 /* If the cached value is the same as the new value, skip the write */
1420 if (oh->_sysc_cache != v)
1421 _write_sysconfig(v, oh);
1424 * Set the autoidle bit only after setting the smartidle bit
1425 * Setting this will not have any impact on the other modules.
1427 if (sf & SYSC_HAS_AUTOIDLE) {
1428 idlemode = (oh->flags & HWMOD_NO_OCP_AUTOIDLE) ?
1430 _set_module_autoidle(oh, idlemode, &v);
1431 _write_sysconfig(v, oh);
1436 * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG
1437 * @oh: struct omap_hwmod *
1439 * If module is marked as SWSUP_SIDLE, force the module into slave
1440 * idle; otherwise, configure it for smart-idle. If module is marked
1441 * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
1442 * configure it for smart-standby. No return value.
1444 static void _idle_sysc(struct omap_hwmod *oh)
1449 if (!oh->class->sysc)
1452 v = oh->_sysc_cache;
1453 sf = oh->class->sysc->sysc_flags;
1455 if (sf & SYSC_HAS_SIDLEMODE) {
1456 if (oh->flags & HWMOD_SWSUP_SIDLE) {
1457 idlemode = HWMOD_IDLEMODE_FORCE;
1459 if (sf & SYSC_HAS_ENAWAKEUP)
1460 _enable_wakeup(oh, &v);
1461 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
1462 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1464 idlemode = HWMOD_IDLEMODE_SMART;
1466 _set_slave_idlemode(oh, idlemode, &v);
1469 if (sf & SYSC_HAS_MIDLEMODE) {
1470 if ((oh->flags & HWMOD_SWSUP_MSTANDBY) ||
1471 (oh->flags & HWMOD_FORCE_MSTANDBY)) {
1472 idlemode = HWMOD_IDLEMODE_FORCE;
1474 if (sf & SYSC_HAS_ENAWAKEUP)
1475 _enable_wakeup(oh, &v);
1476 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
1477 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1479 idlemode = HWMOD_IDLEMODE_SMART;
1481 _set_master_standbymode(oh, idlemode, &v);
1484 _write_sysconfig(v, oh);
1488 * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG
1489 * @oh: struct omap_hwmod *
1491 * Force the module into slave idle and master suspend. No return
1494 static void _shutdown_sysc(struct omap_hwmod *oh)
1499 if (!oh->class->sysc)
1502 v = oh->_sysc_cache;
1503 sf = oh->class->sysc->sysc_flags;
1505 if (sf & SYSC_HAS_SIDLEMODE)
1506 _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v);
1508 if (sf & SYSC_HAS_MIDLEMODE)
1509 _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v);
1511 if (sf & SYSC_HAS_AUTOIDLE)
1512 _set_module_autoidle(oh, 1, &v);
1514 _write_sysconfig(v, oh);
1518 * _lookup - find an omap_hwmod by name
1519 * @name: find an omap_hwmod by name
1521 * Return a pointer to an omap_hwmod by name, or NULL if not found.
1523 static struct omap_hwmod *_lookup(const char *name)
1525 struct omap_hwmod *oh, *temp_oh;
1529 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
1530 if (!strcmp(name, temp_oh->name)) {
1540 * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
1541 * @oh: struct omap_hwmod *
1543 * Convert a clockdomain name stored in a struct omap_hwmod into a
1544 * clockdomain pointer, and save it into the struct omap_hwmod.
1545 * Return -EINVAL if the clkdm_name lookup failed.
1547 static int _init_clkdm(struct omap_hwmod *oh)
1549 if (!oh->clkdm_name) {
1550 pr_debug("omap_hwmod: %s: missing clockdomain\n", oh->name);
1554 oh->clkdm = clkdm_lookup(oh->clkdm_name);
1556 pr_warn("omap_hwmod: %s: could not associate to clkdm %s\n",
1557 oh->name, oh->clkdm_name);
1561 pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
1562 oh->name, oh->clkdm_name);
1568 * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
1569 * well the clockdomain.
1570 * @oh: struct omap_hwmod *
1571 * @data: not used; pass NULL
1573 * Called by omap_hwmod_setup_*() (after omap2_clk_init()).
1574 * Resolves all clock names embedded in the hwmod. Returns 0 on
1575 * success, or a negative error code on failure.
1577 static int _init_clocks(struct omap_hwmod *oh, void *data)
1581 if (oh->_state != _HWMOD_STATE_REGISTERED)
1584 pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name);
1586 if (soc_ops.init_clkdm)
1587 ret |= soc_ops.init_clkdm(oh);
1589 ret |= _init_main_clk(oh);
1590 ret |= _init_interface_clks(oh);
1591 ret |= _init_opt_clks(oh);
1594 oh->_state = _HWMOD_STATE_CLKS_INITED;
1596 pr_warn("omap_hwmod: %s: cannot _init_clocks\n", oh->name);
1602 * _lookup_hardreset - fill register bit info for this hwmod/reset line
1603 * @oh: struct omap_hwmod *
1604 * @name: name of the reset line in the context of this hwmod
1605 * @ohri: struct omap_hwmod_rst_info * that this function will fill in
1607 * Return the bit position of the reset line that match the
1608 * input name. Return -ENOENT if not found.
1610 static int _lookup_hardreset(struct omap_hwmod *oh, const char *name,
1611 struct omap_hwmod_rst_info *ohri)
1615 for (i = 0; i < oh->rst_lines_cnt; i++) {
1616 const char *rst_line = oh->rst_lines[i].name;
1617 if (!strcmp(rst_line, name)) {
1618 ohri->rst_shift = oh->rst_lines[i].rst_shift;
1619 ohri->st_shift = oh->rst_lines[i].st_shift;
1620 pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n",
1621 oh->name, __func__, rst_line, ohri->rst_shift,
1632 * _assert_hardreset - assert the HW reset line of submodules
1633 * contained in the hwmod module.
1634 * @oh: struct omap_hwmod *
1635 * @name: name of the reset line to lookup and assert
1637 * Some IP like dsp, ipu or iva contain processor that require an HW
1638 * reset line to be assert / deassert in order to enable fully the IP.
1639 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1640 * asserting the hardreset line on the currently-booted SoC, or passes
1641 * along the return value from _lookup_hardreset() or the SoC's
1642 * assert_hardreset code.
1644 static int _assert_hardreset(struct omap_hwmod *oh, const char *name)
1646 struct omap_hwmod_rst_info ohri;
1652 if (!soc_ops.assert_hardreset)
1655 ret = _lookup_hardreset(oh, name, &ohri);
1659 ret = soc_ops.assert_hardreset(oh, &ohri);
1665 * _deassert_hardreset - deassert the HW reset line of submodules contained
1666 * in the hwmod module.
1667 * @oh: struct omap_hwmod *
1668 * @name: name of the reset line to look up and deassert
1670 * Some IP like dsp, ipu or iva contain processor that require an HW
1671 * reset line to be assert / deassert in order to enable fully the IP.
1672 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1673 * deasserting the hardreset line on the currently-booted SoC, or passes
1674 * along the return value from _lookup_hardreset() or the SoC's
1675 * deassert_hardreset code.
1677 static int _deassert_hardreset(struct omap_hwmod *oh, const char *name)
1679 struct omap_hwmod_rst_info ohri;
1686 if (!soc_ops.deassert_hardreset)
1689 ret = _lookup_hardreset(oh, name, &ohri);
1695 * A clockdomain must be in SW_SUP otherwise reset
1696 * might not be completed. The clockdomain can be set
1697 * in HW_AUTO only when the module become ready.
1699 hwsup = clkdm_in_hwsup(oh->clkdm);
1700 ret = clkdm_hwmod_enable(oh->clkdm, oh);
1702 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
1703 oh->name, oh->clkdm->name, ret);
1709 if (soc_ops.enable_module)
1710 soc_ops.enable_module(oh);
1712 ret = soc_ops.deassert_hardreset(oh, &ohri);
1714 if (soc_ops.disable_module)
1715 soc_ops.disable_module(oh);
1716 _disable_clocks(oh);
1719 pr_warn("omap_hwmod: %s: failed to hardreset\n", oh->name);
1723 * Set the clockdomain to HW_AUTO, assuming that the
1724 * previous state was HW_AUTO.
1727 clkdm_allow_idle(oh->clkdm);
1729 clkdm_hwmod_disable(oh->clkdm, oh);
1736 * _read_hardreset - read the HW reset line state of submodules
1737 * contained in the hwmod module
1738 * @oh: struct omap_hwmod *
1739 * @name: name of the reset line to look up and read
1741 * Return the state of the reset line. Returns -EINVAL if @oh is
1742 * null, -ENOSYS if we have no way of reading the hardreset line
1743 * status on the currently-booted SoC, or passes along the return
1744 * value from _lookup_hardreset() or the SoC's is_hardreset_asserted
1747 static int _read_hardreset(struct omap_hwmod *oh, const char *name)
1749 struct omap_hwmod_rst_info ohri;
1755 if (!soc_ops.is_hardreset_asserted)
1758 ret = _lookup_hardreset(oh, name, &ohri);
1762 return soc_ops.is_hardreset_asserted(oh, &ohri);
1766 * _are_all_hardreset_lines_asserted - return true if the @oh is hard-reset
1767 * @oh: struct omap_hwmod *
1769 * If all hardreset lines associated with @oh are asserted, then return true.
1770 * Otherwise, if part of @oh is out hardreset or if no hardreset lines
1771 * associated with @oh are asserted, then return false.
1772 * This function is used to avoid executing some parts of the IP block
1773 * enable/disable sequence if its hardreset line is set.
1775 static bool _are_all_hardreset_lines_asserted(struct omap_hwmod *oh)
1779 if (oh->rst_lines_cnt == 0)
1782 for (i = 0; i < oh->rst_lines_cnt; i++)
1783 if (_read_hardreset(oh, oh->rst_lines[i].name) > 0)
1786 if (oh->rst_lines_cnt == rst_cnt)
1793 * _are_any_hardreset_lines_asserted - return true if any part of @oh is
1795 * @oh: struct omap_hwmod *
1797 * If any hardreset lines associated with @oh are asserted, then
1798 * return true. Otherwise, if no hardreset lines associated with @oh
1799 * are asserted, or if @oh has no hardreset lines, then return false.
1800 * This function is used to avoid executing some parts of the IP block
1801 * enable/disable sequence if any hardreset line is set.
1803 static bool _are_any_hardreset_lines_asserted(struct omap_hwmod *oh)
1808 for (i = 0; i < oh->rst_lines_cnt && rst_cnt == 0; i++)
1809 if (_read_hardreset(oh, oh->rst_lines[i].name) > 0)
1812 return (rst_cnt) ? true : false;
1816 * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
1817 * @oh: struct omap_hwmod *
1819 * Disable the PRCM module mode related to the hwmod @oh.
1820 * Return EINVAL if the modulemode is not supported and 0 in case of success.
1822 static int _omap4_disable_module(struct omap_hwmod *oh)
1826 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
1830 * Since integration code might still be doing something, only
1831 * disable if all lines are under hardreset.
1833 if (_are_any_hardreset_lines_asserted(oh))
1836 pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__);
1838 omap_cm_module_disable(oh->clkdm->prcm_partition, oh->clkdm->cm_inst,
1839 oh->prcm.omap4.clkctrl_offs);
1841 v = _omap4_wait_target_disable(oh);
1843 pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
1850 * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit
1851 * @oh: struct omap_hwmod *
1853 * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
1854 * enabled for this to work. Returns -ENOENT if the hwmod cannot be
1855 * reset this way, -EINVAL if the hwmod is in the wrong state,
1856 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1858 * In OMAP3 a specific SYSSTATUS register is used to get the reset status.
1859 * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead
1860 * use the SYSCONFIG softreset bit to provide the status.
1862 * Note that some IP like McBSP do have reset control but don't have
1865 static int _ocp_softreset(struct omap_hwmod *oh)
1871 if (!oh->class->sysc ||
1872 !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
1875 /* clocks must be on for this operation */
1876 if (oh->_state != _HWMOD_STATE_ENABLED) {
1877 pr_warn("omap_hwmod: %s: reset can only be entered from enabled state\n",
1882 /* For some modules, all optionnal clocks need to be enabled as well */
1883 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1884 _enable_optional_clocks(oh);
1886 pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh->name);
1888 v = oh->_sysc_cache;
1889 ret = _set_softreset(oh, &v);
1893 _write_sysconfig(v, oh);
1895 if (oh->class->sysc->srst_udelay)
1896 udelay(oh->class->sysc->srst_udelay);
1898 c = _wait_softreset_complete(oh);
1899 if (c == MAX_MODULE_SOFTRESET_WAIT) {
1900 pr_warn("omap_hwmod: %s: softreset failed (waited %d usec)\n",
1901 oh->name, MAX_MODULE_SOFTRESET_WAIT);
1905 pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh->name, c);
1908 ret = _clear_softreset(oh, &v);
1912 _write_sysconfig(v, oh);
1915 * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
1916 * _wait_target_ready() or _reset()
1920 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1921 _disable_optional_clocks(oh);
1927 * _reset - reset an omap_hwmod
1928 * @oh: struct omap_hwmod *
1930 * Resets an omap_hwmod @oh. If the module has a custom reset
1931 * function pointer defined, then call it to reset the IP block, and
1932 * pass along its return value to the caller. Otherwise, if the IP
1933 * block has an OCP_SYSCONFIG register with a SOFTRESET bitfield
1934 * associated with it, call a function to reset the IP block via that
1935 * method, and pass along the return value to the caller. Finally, if
1936 * the IP block has some hardreset lines associated with it, assert
1937 * all of those, but do _not_ deassert them. (This is because driver
1938 * authors have expressed an apparent requirement to control the
1939 * deassertion of the hardreset lines themselves.)
1941 * The default software reset mechanism for most OMAP IP blocks is
1942 * triggered via the OCP_SYSCONFIG.SOFTRESET bit. However, some
1943 * hwmods cannot be reset via this method. Some are not targets and
1944 * therefore have no OCP header registers to access. Others (like the
1945 * IVA) have idiosyncratic reset sequences. So for these relatively
1946 * rare cases, custom reset code can be supplied in the struct
1947 * omap_hwmod_class .reset function pointer.
1949 * _set_dmadisable() is called to set the DMADISABLE bit so that it
1950 * does not prevent idling of the system. This is necessary for cases
1951 * where ROMCODE/BOOTLOADER uses dma and transfers control to the
1952 * kernel without disabling dma.
1954 * Passes along the return value from either _ocp_softreset() or the
1955 * custom reset function - these must return -EINVAL if the hwmod
1956 * cannot be reset this way or if the hwmod is in the wrong state,
1957 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1959 static int _reset(struct omap_hwmod *oh)
1963 pr_debug("omap_hwmod: %s: resetting\n", oh->name);
1965 if (oh->class->reset) {
1966 r = oh->class->reset(oh);
1968 if (oh->rst_lines_cnt > 0) {
1969 for (i = 0; i < oh->rst_lines_cnt; i++)
1970 _assert_hardreset(oh, oh->rst_lines[i].name);
1973 r = _ocp_softreset(oh);
1979 _set_dmadisable(oh);
1982 * OCP_SYSCONFIG bits need to be reprogrammed after a
1983 * softreset. The _enable() function should be split to avoid
1984 * the rewrite of the OCP_SYSCONFIG register.
1986 if (oh->class->sysc) {
1987 _update_sysc_cache(oh);
1995 * _reconfigure_io_chain - clear any I/O chain wakeups and reconfigure chain
1997 * Call the appropriate PRM function to clear any logged I/O chain
1998 * wakeups and to reconfigure the chain. This apparently needs to be
1999 * done upon every mux change. Since hwmods can be concurrently
2000 * enabled and idled, hold a spinlock around the I/O chain
2001 * reconfiguration sequence. No return value.
2003 * XXX When the PRM code is moved to drivers, this function can be removed,
2004 * as the PRM infrastructure should abstract this.
2006 static void _reconfigure_io_chain(void)
2008 unsigned long flags;
2010 spin_lock_irqsave(&io_chain_lock, flags);
2012 omap_prm_reconfigure_io_chain();
2014 spin_unlock_irqrestore(&io_chain_lock, flags);
2018 * _omap4_update_context_lost - increment hwmod context loss counter if
2019 * hwmod context was lost, and clear hardware context loss reg
2020 * @oh: hwmod to check for context loss
2022 * If the PRCM indicates that the hwmod @oh lost context, increment
2023 * our in-memory context loss counter, and clear the RM_*_CONTEXT
2024 * bits. No return value.
2026 static void _omap4_update_context_lost(struct omap_hwmod *oh)
2028 if (oh->prcm.omap4.flags & HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT)
2031 if (!prm_was_any_context_lost_old(oh->clkdm->pwrdm.ptr->prcm_partition,
2032 oh->clkdm->pwrdm.ptr->prcm_offs,
2033 oh->prcm.omap4.context_offs))
2036 oh->prcm.omap4.context_lost_counter++;
2037 prm_clear_context_loss_flags_old(oh->clkdm->pwrdm.ptr->prcm_partition,
2038 oh->clkdm->pwrdm.ptr->prcm_offs,
2039 oh->prcm.omap4.context_offs);
2043 * _omap4_get_context_lost - get context loss counter for a hwmod
2044 * @oh: hwmod to get context loss counter for
2046 * Returns the in-memory context loss counter for a hwmod.
2048 static int _omap4_get_context_lost(struct omap_hwmod *oh)
2050 return oh->prcm.omap4.context_lost_counter;
2054 * _enable_preprogram - Pre-program an IP block during the _enable() process
2055 * @oh: struct omap_hwmod *
2057 * Some IP blocks (such as AESS) require some additional programming
2058 * after enable before they can enter idle. If a function pointer to
2059 * do so is present in the hwmod data, then call it and pass along the
2060 * return value; otherwise, return 0.
2062 static int _enable_preprogram(struct omap_hwmod *oh)
2064 if (!oh->class->enable_preprogram)
2067 return oh->class->enable_preprogram(oh);
2071 * _enable - enable an omap_hwmod
2072 * @oh: struct omap_hwmod *
2074 * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
2075 * register target. Returns -EINVAL if the hwmod is in the wrong
2076 * state or passes along the return value of _wait_target_ready().
2078 static int _enable(struct omap_hwmod *oh)
2083 pr_debug("omap_hwmod: %s: enabling\n", oh->name);
2086 * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled
2087 * state at init. Now that someone is really trying to enable
2088 * them, just ensure that the hwmod mux is set.
2090 if (oh->_int_flags & _HWMOD_SKIP_ENABLE) {
2092 * If the caller has mux data populated, do the mux'ing
2093 * which wouldn't have been done as part of the _enable()
2094 * done during setup.
2097 omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
2099 oh->_int_flags &= ~_HWMOD_SKIP_ENABLE;
2103 if (oh->_state != _HWMOD_STATE_INITIALIZED &&
2104 oh->_state != _HWMOD_STATE_IDLE &&
2105 oh->_state != _HWMOD_STATE_DISABLED) {
2106 WARN(1, "omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state\n",
2112 * If an IP block contains HW reset lines and all of them are
2113 * asserted, we let integration code associated with that
2114 * block handle the enable. We've received very little
2115 * information on what those driver authors need, and until
2116 * detailed information is provided and the driver code is
2117 * posted to the public lists, this is probably the best we
2120 if (_are_all_hardreset_lines_asserted(oh))
2123 /* Mux pins for device runtime if populated */
2124 if (oh->mux && (!oh->mux->enabled ||
2125 ((oh->_state == _HWMOD_STATE_IDLE) &&
2126 oh->mux->pads_dynamic))) {
2127 omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
2128 _reconfigure_io_chain();
2129 } else if (oh->flags & HWMOD_RECONFIG_IO_CHAIN) {
2130 _reconfigure_io_chain();
2133 _add_initiator_dep(oh, mpu_oh);
2137 * A clockdomain must be in SW_SUP before enabling
2138 * completely the module. The clockdomain can be set
2139 * in HW_AUTO only when the module become ready.
2141 hwsup = clkdm_in_hwsup(oh->clkdm) &&
2142 !clkdm_missing_idle_reporting(oh->clkdm);
2143 r = clkdm_hwmod_enable(oh->clkdm, oh);
2145 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
2146 oh->name, oh->clkdm->name, r);
2152 if (soc_ops.enable_module)
2153 soc_ops.enable_module(oh);
2154 if (oh->flags & HWMOD_BLOCK_WFI)
2155 cpu_idle_poll_ctrl(true);
2157 if (soc_ops.update_context_lost)
2158 soc_ops.update_context_lost(oh);
2160 r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) :
2164 * Set the clockdomain to HW_AUTO only if the target is ready,
2165 * assuming that the previous state was HW_AUTO
2167 if (oh->clkdm && hwsup)
2168 clkdm_allow_idle(oh->clkdm);
2170 oh->_state = _HWMOD_STATE_ENABLED;
2172 /* Access the sysconfig only if the target is ready */
2173 if (oh->class->sysc) {
2174 if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED))
2175 _update_sysc_cache(oh);
2178 r = _enable_preprogram(oh);
2180 if (soc_ops.disable_module)
2181 soc_ops.disable_module(oh);
2182 _disable_clocks(oh);
2183 pr_err("omap_hwmod: %s: _wait_target_ready failed: %d\n",
2187 clkdm_hwmod_disable(oh->clkdm, oh);
2194 * _idle - idle an omap_hwmod
2195 * @oh: struct omap_hwmod *
2197 * Idles an omap_hwmod @oh. This should be called once the hwmod has
2198 * no further work. Returns -EINVAL if the hwmod is in the wrong
2199 * state or returns 0.
2201 static int _idle(struct omap_hwmod *oh)
2203 pr_debug("omap_hwmod: %s: idling\n", oh->name);
2205 if (oh->_state != _HWMOD_STATE_ENABLED) {
2206 WARN(1, "omap_hwmod: %s: idle state can only be entered from enabled state\n",
2211 if (_are_all_hardreset_lines_asserted(oh))
2214 if (oh->class->sysc)
2216 _del_initiator_dep(oh, mpu_oh);
2218 if (oh->flags & HWMOD_BLOCK_WFI)
2219 cpu_idle_poll_ctrl(false);
2220 if (soc_ops.disable_module)
2221 soc_ops.disable_module(oh);
2224 * The module must be in idle mode before disabling any parents
2225 * clocks. Otherwise, the parent clock might be disabled before
2226 * the module transition is done, and thus will prevent the
2227 * transition to complete properly.
2229 _disable_clocks(oh);
2231 clkdm_hwmod_disable(oh->clkdm, oh);
2233 /* Mux pins for device idle if populated */
2234 if (oh->mux && oh->mux->pads_dynamic) {
2235 omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);
2236 _reconfigure_io_chain();
2237 } else if (oh->flags & HWMOD_RECONFIG_IO_CHAIN) {
2238 _reconfigure_io_chain();
2241 oh->_state = _HWMOD_STATE_IDLE;
2247 * _shutdown - shutdown an omap_hwmod
2248 * @oh: struct omap_hwmod *
2250 * Shut down an omap_hwmod @oh. This should be called when the driver
2251 * used for the hwmod is removed or unloaded or if the driver is not
2252 * used by the system. Returns -EINVAL if the hwmod is in the wrong
2253 * state or returns 0.
2255 static int _shutdown(struct omap_hwmod *oh)
2260 if (oh->_state != _HWMOD_STATE_IDLE &&
2261 oh->_state != _HWMOD_STATE_ENABLED) {
2262 WARN(1, "omap_hwmod: %s: disabled state can only be entered from idle, or enabled state\n",
2267 if (_are_all_hardreset_lines_asserted(oh))
2270 pr_debug("omap_hwmod: %s: disabling\n", oh->name);
2272 if (oh->class->pre_shutdown) {
2273 prev_state = oh->_state;
2274 if (oh->_state == _HWMOD_STATE_IDLE)
2276 ret = oh->class->pre_shutdown(oh);
2278 if (prev_state == _HWMOD_STATE_IDLE)
2284 if (oh->class->sysc) {
2285 if (oh->_state == _HWMOD_STATE_IDLE)
2290 /* clocks and deps are already disabled in idle */
2291 if (oh->_state == _HWMOD_STATE_ENABLED) {
2292 _del_initiator_dep(oh, mpu_oh);
2293 /* XXX what about the other system initiators here? dma, dsp */
2294 if (oh->flags & HWMOD_BLOCK_WFI)
2295 cpu_idle_poll_ctrl(false);
2296 if (soc_ops.disable_module)
2297 soc_ops.disable_module(oh);
2298 _disable_clocks(oh);
2300 clkdm_hwmod_disable(oh->clkdm, oh);
2302 /* XXX Should this code also force-disable the optional clocks? */
2304 for (i = 0; i < oh->rst_lines_cnt; i++)
2305 _assert_hardreset(oh, oh->rst_lines[i].name);
2307 /* Mux pins to safe mode or use populated off mode values */
2309 omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED);
2311 oh->_state = _HWMOD_STATE_DISABLED;
2316 static int of_dev_find_hwmod(struct device_node *np,
2317 struct omap_hwmod *oh)
2322 count = of_property_count_strings(np, "ti,hwmods");
2326 for (i = 0; i < count; i++) {
2327 res = of_property_read_string_index(np, "ti,hwmods",
2331 if (!strcmp(p, oh->name)) {
2332 pr_debug("omap_hwmod: dt %s[%i] uses hwmod %s\n",
2333 np->name, i, oh->name);
2342 * of_dev_hwmod_lookup - look up needed hwmod from dt blob
2343 * @np: struct device_node *
2344 * @oh: struct omap_hwmod *
2345 * @index: index of the entry found
2346 * @found: struct device_node * found or NULL
2348 * Parse the dt blob and find out needed hwmod. Recursive function is
2349 * implemented to take care hierarchical dt blob parsing.
2350 * Return: Returns 0 on success, -ENODEV when not found.
2352 static int of_dev_hwmod_lookup(struct device_node *np,
2353 struct omap_hwmod *oh,
2355 struct device_node **found)
2357 struct device_node *np0 = NULL;
2360 res = of_dev_find_hwmod(np, oh);
2367 for_each_child_of_node(np, np0) {
2368 struct device_node *fc;
2371 res = of_dev_hwmod_lookup(np0, oh, &i, &fc);
2386 * _init_mpu_rt_base - populate the virtual address for a hwmod
2387 * @oh: struct omap_hwmod * to locate the virtual address
2388 * @data: (unused, caller should pass NULL)
2389 * @index: index of the reg entry iospace in device tree
2390 * @np: struct device_node * of the IP block's device node in the DT data
2392 * Cache the virtual address used by the MPU to access this IP block's
2393 * registers. This address is needed early so the OCP registers that
2394 * are part of the device's address space can be ioremapped properly.
2396 * If SYSC access is not needed, the registers will not be remapped
2397 * and non-availability of MPU access is not treated as an error.
2399 * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and
2400 * -ENXIO on absent or invalid register target address space.
2402 static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data,
2403 int index, struct device_node *np)
2405 struct omap_hwmod_addr_space *mem;
2406 void __iomem *va_start = NULL;
2411 _save_mpu_port_index(oh);
2413 /* if we don't need sysc access we don't need to ioremap */
2414 if (!oh->class->sysc)
2417 /* we can't continue without MPU PORT if we need sysc access */
2418 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
2421 mem = _find_mpu_rt_addr_space(oh);
2423 pr_debug("omap_hwmod: %s: no MPU register target found\n",
2426 /* Extract the IO space from device tree blob */
2428 pr_err("omap_hwmod: %s: no dt node\n", oh->name);
2432 va_start = of_iomap(np, index + oh->mpu_rt_idx);
2434 va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
2439 pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name);
2441 pr_err("omap_hwmod: %s: Missing dt reg%i for %s\n",
2442 oh->name, index, np->full_name);
2446 pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
2447 oh->name, va_start);
2449 oh->_mpu_rt_va = va_start;
2454 * _init - initialize internal data for the hwmod @oh
2455 * @oh: struct omap_hwmod *
2458 * Look up the clocks and the address space used by the MPU to access
2459 * registers belonging to the hwmod @oh. @oh must already be
2460 * registered at this point. This is the first of two phases for
2461 * hwmod initialization. Code called here does not touch any hardware
2462 * registers, it simply prepares internal data structures. Returns 0
2463 * upon success or if the hwmod isn't registered or if the hwmod's
2464 * address space is not defined, or -EINVAL upon failure.
2466 static int __init _init(struct omap_hwmod *oh, void *data)
2469 struct device_node *np = NULL;
2471 if (oh->_state != _HWMOD_STATE_REGISTERED)
2474 if (of_have_populated_dt()) {
2475 struct device_node *bus;
2477 bus = of_find_node_by_name(NULL, "ocp");
2481 r = of_dev_hwmod_lookup(bus, oh, &index, &np);
2483 pr_debug("omap_hwmod: %s missing dt data\n", oh->name);
2484 else if (np && index)
2485 pr_warn("omap_hwmod: %s using broken dt data from %s\n",
2486 oh->name, np->name);
2489 r = _init_mpu_rt_base(oh, NULL, index, np);
2491 WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n",
2496 r = _init_clocks(oh, NULL);
2498 WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh->name);
2503 if (of_find_property(np, "ti,no-reset-on-init", NULL))
2504 oh->flags |= HWMOD_INIT_NO_RESET;
2505 if (of_find_property(np, "ti,no-idle-on-init", NULL))
2506 oh->flags |= HWMOD_INIT_NO_IDLE;
2509 oh->_state = _HWMOD_STATE_INITIALIZED;
2515 * _setup_iclk_autoidle - configure an IP block's interface clocks
2516 * @oh: struct omap_hwmod *
2518 * Set up the module's interface clocks. XXX This function is still mostly
2519 * a stub; implementing this properly requires iclk autoidle usecounting in
2520 * the clock code. No return value.
2522 static void __init _setup_iclk_autoidle(struct omap_hwmod *oh)
2524 struct omap_hwmod_ocp_if *os;
2525 struct list_head *p;
2527 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2530 p = oh->slave_ports.next;
2532 while (i < oh->slaves_cnt) {
2533 os = _fetch_next_ocp_if(&p, &i);
2537 if (os->flags & OCPIF_SWSUP_IDLE) {
2538 /* XXX omap_iclk_deny_idle(c); */
2540 /* XXX omap_iclk_allow_idle(c); */
2541 clk_enable(os->_clk);
2549 * _setup_reset - reset an IP block during the setup process
2550 * @oh: struct omap_hwmod *
2552 * Reset the IP block corresponding to the hwmod @oh during the setup
2553 * process. The IP block is first enabled so it can be successfully
2554 * reset. Returns 0 upon success or a negative error code upon
2557 static int __init _setup_reset(struct omap_hwmod *oh)
2561 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2564 if (oh->flags & HWMOD_EXT_OPT_MAIN_CLK)
2567 if (oh->rst_lines_cnt == 0) {
2570 pr_warn("omap_hwmod: %s: cannot be enabled for reset (%d)\n",
2571 oh->name, oh->_state);
2576 if (!(oh->flags & HWMOD_INIT_NO_RESET))
2583 * _setup_postsetup - transition to the appropriate state after _setup
2584 * @oh: struct omap_hwmod *
2586 * Place an IP block represented by @oh into a "post-setup" state --
2587 * either IDLE, ENABLED, or DISABLED. ("post-setup" simply means that
2588 * this function is called at the end of _setup().) The postsetup
2589 * state for an IP block can be changed by calling
2590 * omap_hwmod_enter_postsetup_state() early in the boot process,
2591 * before one of the omap_hwmod_setup*() functions are called for the
2594 * The IP block stays in this state until a PM runtime-based driver is
2595 * loaded for that IP block. A post-setup state of IDLE is
2596 * appropriate for almost all IP blocks with runtime PM-enabled
2597 * drivers, since those drivers are able to enable the IP block. A
2598 * post-setup state of ENABLED is appropriate for kernels with PM
2599 * runtime disabled. The DISABLED state is appropriate for unusual IP
2600 * blocks such as the MPU WDTIMER on kernels without WDTIMER drivers
2601 * included, since the WDTIMER starts running on reset and will reset
2602 * the MPU if left active.
2604 * This post-setup mechanism is deprecated. Once all of the OMAP
2605 * drivers have been converted to use PM runtime, and all of the IP
2606 * block data and interconnect data is available to the hwmod code, it
2607 * should be possible to replace this mechanism with a "lazy reset"
2608 * arrangement. In a "lazy reset" setup, each IP block is enabled
2609 * when the driver first probes, then all remaining IP blocks without
2610 * drivers are either shut down or enabled after the drivers have
2611 * loaded. However, this cannot take place until the above
2612 * preconditions have been met, since otherwise the late reset code
2613 * has no way of knowing which IP blocks are in use by drivers, and
2614 * which ones are unused.
2618 static void __init _setup_postsetup(struct omap_hwmod *oh)
2622 if (oh->rst_lines_cnt > 0)
2625 postsetup_state = oh->_postsetup_state;
2626 if (postsetup_state == _HWMOD_STATE_UNKNOWN)
2627 postsetup_state = _HWMOD_STATE_ENABLED;
2630 * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data -
2631 * it should be set by the core code as a runtime flag during startup
2633 if ((oh->flags & HWMOD_INIT_NO_IDLE) &&
2634 (postsetup_state == _HWMOD_STATE_IDLE)) {
2635 oh->_int_flags |= _HWMOD_SKIP_ENABLE;
2636 postsetup_state = _HWMOD_STATE_ENABLED;
2639 if (postsetup_state == _HWMOD_STATE_IDLE)
2641 else if (postsetup_state == _HWMOD_STATE_DISABLED)
2643 else if (postsetup_state != _HWMOD_STATE_ENABLED)
2644 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2645 oh->name, postsetup_state);
2651 * _setup - prepare IP block hardware for use
2652 * @oh: struct omap_hwmod *
2653 * @n: (unused, pass NULL)
2655 * Configure the IP block represented by @oh. This may include
2656 * enabling the IP block, resetting it, and placing it into a
2657 * post-setup state, depending on the type of IP block and applicable
2658 * flags. IP blocks are reset to prevent any previous configuration
2659 * by the bootloader or previous operating system from interfering
2660 * with power management or other parts of the system. The reset can
2661 * be avoided; see omap_hwmod_no_setup_reset(). This is the second of
2662 * two phases for hwmod initialization. Code called here generally
2663 * affects the IP block hardware, or system integration hardware
2664 * associated with the IP block. Returns 0.
2666 static int __init _setup(struct omap_hwmod *oh, void *data)
2668 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2671 if (oh->parent_hwmod) {
2674 r = _enable(oh->parent_hwmod);
2675 WARN(r, "hwmod: %s: setup: failed to enable parent hwmod %s\n",
2676 oh->name, oh->parent_hwmod->name);
2679 _setup_iclk_autoidle(oh);
2681 if (!_setup_reset(oh))
2682 _setup_postsetup(oh);
2684 if (oh->parent_hwmod) {
2687 postsetup_state = oh->parent_hwmod->_postsetup_state;
2689 if (postsetup_state == _HWMOD_STATE_IDLE)
2690 _idle(oh->parent_hwmod);
2691 else if (postsetup_state == _HWMOD_STATE_DISABLED)
2692 _shutdown(oh->parent_hwmod);
2693 else if (postsetup_state != _HWMOD_STATE_ENABLED)
2694 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2695 oh->parent_hwmod->name, postsetup_state);
2702 * _register - register a struct omap_hwmod
2703 * @oh: struct omap_hwmod *
2705 * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
2706 * already has been registered by the same name; -EINVAL if the
2707 * omap_hwmod is in the wrong state, if @oh is NULL, if the
2708 * omap_hwmod's class field is NULL; if the omap_hwmod is missing a
2709 * name, or if the omap_hwmod's class is missing a name; or 0 upon
2712 * XXX The data should be copied into bootmem, so the original data
2713 * should be marked __initdata and freed after init. This would allow
2714 * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
2715 * that the copy process would be relatively complex due to the large number
2718 static int __init _register(struct omap_hwmod *oh)
2720 if (!oh || !oh->name || !oh->class || !oh->class->name ||
2721 (oh->_state != _HWMOD_STATE_UNKNOWN))
2724 pr_debug("omap_hwmod: %s: registering\n", oh->name);
2726 if (_lookup(oh->name))
2729 list_add_tail(&oh->node, &omap_hwmod_list);
2731 INIT_LIST_HEAD(&oh->master_ports);
2732 INIT_LIST_HEAD(&oh->slave_ports);
2733 spin_lock_init(&oh->_lock);
2734 lockdep_set_class(&oh->_lock, &oh->hwmod_key);
2736 oh->_state = _HWMOD_STATE_REGISTERED;
2739 * XXX Rather than doing a strcmp(), this should test a flag
2740 * set in the hwmod data, inserted by the autogenerator code.
2742 if (!strcmp(oh->name, MPU_INITIATOR_NAME))
2749 * _alloc_links - return allocated memory for hwmod links
2750 * @ml: pointer to a struct omap_hwmod_link * for the master link
2751 * @sl: pointer to a struct omap_hwmod_link * for the slave link
2753 * Return pointers to two struct omap_hwmod_link records, via the
2754 * addresses pointed to by @ml and @sl. Will first attempt to return
2755 * memory allocated as part of a large initial block, but if that has
2756 * been exhausted, will allocate memory itself. Since ideally this
2757 * second allocation path will never occur, the number of these
2758 * 'supplemental' allocations will be logged when debugging is
2759 * enabled. Returns 0.
2761 static int __init _alloc_links(struct omap_hwmod_link **ml,
2762 struct omap_hwmod_link **sl)
2766 if ((free_ls + LINKS_PER_OCP_IF) <= max_ls) {
2767 *ml = &linkspace[free_ls++];
2768 *sl = &linkspace[free_ls++];
2772 sz = sizeof(struct omap_hwmod_link) * LINKS_PER_OCP_IF;
2775 *ml = memblock_virt_alloc(sz, 0);
2777 *sl = (void *)(*ml) + sizeof(struct omap_hwmod_link);
2780 pr_debug("omap_hwmod: supplemental link allocations needed: %d\n",
2781 ls_supp * LINKS_PER_OCP_IF);
2787 * _add_link - add an interconnect between two IP blocks
2788 * @oi: pointer to a struct omap_hwmod_ocp_if record
2790 * Add struct omap_hwmod_link records connecting the master IP block
2791 * specified in @oi->master to @oi, and connecting the slave IP block
2792 * specified in @oi->slave to @oi. This code is assumed to run before
2793 * preemption or SMP has been enabled, thus avoiding the need for
2794 * locking in this code. Changes to this assumption will require
2795 * additional locking. Returns 0.
2797 static int __init _add_link(struct omap_hwmod_ocp_if *oi)
2799 struct omap_hwmod_link *ml, *sl;
2801 pr_debug("omap_hwmod: %s -> %s: adding link\n", oi->master->name,
2804 _alloc_links(&ml, &sl);
2807 list_add(&ml->node, &oi->master->master_ports);
2808 oi->master->masters_cnt++;
2811 list_add(&sl->node, &oi->slave->slave_ports);
2812 oi->slave->slaves_cnt++;
2818 * _register_link - register a struct omap_hwmod_ocp_if
2819 * @oi: struct omap_hwmod_ocp_if *
2821 * Registers the omap_hwmod_ocp_if record @oi. Returns -EEXIST if it
2822 * has already been registered; -EINVAL if @oi is NULL or if the
2823 * record pointed to by @oi is missing required fields; or 0 upon
2826 * XXX The data should be copied into bootmem, so the original data
2827 * should be marked __initdata and freed after init. This would allow
2828 * unneeded omap_hwmods to be freed on multi-OMAP configurations.
2830 static int __init _register_link(struct omap_hwmod_ocp_if *oi)
2832 if (!oi || !oi->master || !oi->slave || !oi->user)
2835 if (oi->_int_flags & _OCPIF_INT_FLAGS_REGISTERED)
2838 pr_debug("omap_hwmod: registering link from %s to %s\n",
2839 oi->master->name, oi->slave->name);
2842 * Register the connected hwmods, if they haven't been
2843 * registered already
2845 if (oi->master->_state != _HWMOD_STATE_REGISTERED)
2846 _register(oi->master);
2848 if (oi->slave->_state != _HWMOD_STATE_REGISTERED)
2849 _register(oi->slave);
2853 oi->_int_flags |= _OCPIF_INT_FLAGS_REGISTERED;
2859 * _alloc_linkspace - allocate large block of hwmod links
2860 * @ois: pointer to an array of struct omap_hwmod_ocp_if records to count
2862 * Allocate a large block of struct omap_hwmod_link records. This
2863 * improves boot time significantly by avoiding the need to allocate
2864 * individual records one by one. If the number of records to
2865 * allocate in the block hasn't been manually specified, this function
2866 * will count the number of struct omap_hwmod_ocp_if records in @ois
2867 * and use that to determine the allocation size. For SoC families
2868 * that require multiple list registrations, such as OMAP3xxx, this
2869 * estimation process isn't optimal, so manual estimation is advised
2870 * in those cases. Returns -EEXIST if the allocation has already occurred
2871 * or 0 upon success.
2873 static int __init _alloc_linkspace(struct omap_hwmod_ocp_if **ois)
2879 WARN(1, "linkspace already allocated\n");
2885 max_ls += LINKS_PER_OCP_IF;
2887 sz = sizeof(struct omap_hwmod_link) * max_ls;
2889 pr_debug("omap_hwmod: %s: allocating %d byte linkspace (%d links)\n",
2890 __func__, sz, max_ls);
2892 linkspace = memblock_virt_alloc(sz, 0);
2897 /* Static functions intended only for use in soc_ops field function pointers */
2900 * _omap2xxx_3xxx_wait_target_ready - wait for a module to leave slave idle
2901 * @oh: struct omap_hwmod *
2903 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2904 * does not have an IDLEST bit or if the module successfully leaves
2905 * slave idle; otherwise, pass along the return value of the
2906 * appropriate *_cm*_wait_module_ready() function.
2908 static int _omap2xxx_3xxx_wait_target_ready(struct omap_hwmod *oh)
2913 if (oh->flags & HWMOD_NO_IDLEST)
2916 if (!_find_mpu_rt_port(oh))
2919 /* XXX check module SIDLEMODE, hardreset status, enabled clocks */
2921 return omap_cm_wait_module_ready(0, oh->prcm.omap2.module_offs,
2922 oh->prcm.omap2.idlest_reg_id,
2923 oh->prcm.omap2.idlest_idle_bit);
2927 * _omap4_wait_target_ready - wait for a module to leave slave idle
2928 * @oh: struct omap_hwmod *
2930 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2931 * does not have an IDLEST bit or if the module successfully leaves
2932 * slave idle; otherwise, pass along the return value of the
2933 * appropriate *_cm*_wait_module_ready() function.
2935 static int _omap4_wait_target_ready(struct omap_hwmod *oh)
2940 if (oh->flags & HWMOD_NO_IDLEST || !oh->clkdm)
2943 if (!_find_mpu_rt_port(oh))
2946 /* XXX check module SIDLEMODE, hardreset status */
2948 return omap_cm_wait_module_ready(oh->clkdm->prcm_partition,
2950 oh->prcm.omap4.clkctrl_offs, 0);
2954 * _omap2_assert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2955 * @oh: struct omap_hwmod * to assert hardreset
2956 * @ohri: hardreset line data
2958 * Call omap2_prm_assert_hardreset() with parameters extracted from
2959 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2960 * use as an soc_ops function pointer. Passes along the return value
2961 * from omap2_prm_assert_hardreset(). XXX This function is scheduled
2962 * for removal when the PRM code is moved into drivers/.
2964 static int _omap2_assert_hardreset(struct omap_hwmod *oh,
2965 struct omap_hwmod_rst_info *ohri)
2967 return omap_prm_assert_hardreset(ohri->rst_shift, 0,
2968 oh->prcm.omap2.module_offs, 0);
2972 * _omap2_deassert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2973 * @oh: struct omap_hwmod * to deassert hardreset
2974 * @ohri: hardreset line data
2976 * Call omap2_prm_deassert_hardreset() with parameters extracted from
2977 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2978 * use as an soc_ops function pointer. Passes along the return value
2979 * from omap2_prm_deassert_hardreset(). XXX This function is
2980 * scheduled for removal when the PRM code is moved into drivers/.
2982 static int _omap2_deassert_hardreset(struct omap_hwmod *oh,
2983 struct omap_hwmod_rst_info *ohri)
2985 return omap_prm_deassert_hardreset(ohri->rst_shift, ohri->st_shift, 0,
2986 oh->prcm.omap2.module_offs, 0, 0);
2990 * _omap2_is_hardreset_asserted - call OMAP2 PRM hardreset fn with hwmod args
2991 * @oh: struct omap_hwmod * to test hardreset
2992 * @ohri: hardreset line data
2994 * Call omap2_prm_is_hardreset_asserted() with parameters extracted
2995 * from the hwmod @oh and the hardreset line data @ohri. Only
2996 * intended for use as an soc_ops function pointer. Passes along the
2997 * return value from omap2_prm_is_hardreset_asserted(). XXX This
2998 * function is scheduled for removal when the PRM code is moved into
3001 static int _omap2_is_hardreset_asserted(struct omap_hwmod *oh,
3002 struct omap_hwmod_rst_info *ohri)
3004 return omap_prm_is_hardreset_asserted(ohri->st_shift, 0,
3005 oh->prcm.omap2.module_offs, 0);
3009 * _omap4_assert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
3010 * @oh: struct omap_hwmod * to assert hardreset
3011 * @ohri: hardreset line data
3013 * Call omap4_prminst_assert_hardreset() with parameters extracted
3014 * from the hwmod @oh and the hardreset line data @ohri. Only
3015 * intended for use as an soc_ops function pointer. Passes along the
3016 * return value from omap4_prminst_assert_hardreset(). XXX This
3017 * function is scheduled for removal when the PRM code is moved into
3020 static int _omap4_assert_hardreset(struct omap_hwmod *oh,
3021 struct omap_hwmod_rst_info *ohri)
3026 return omap_prm_assert_hardreset(ohri->rst_shift,
3027 oh->clkdm->pwrdm.ptr->prcm_partition,
3028 oh->clkdm->pwrdm.ptr->prcm_offs,
3029 oh->prcm.omap4.rstctrl_offs);
3033 * _omap4_deassert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
3034 * @oh: struct omap_hwmod * to deassert hardreset
3035 * @ohri: hardreset line data
3037 * Call omap4_prminst_deassert_hardreset() with parameters extracted
3038 * from the hwmod @oh and the hardreset line data @ohri. Only
3039 * intended for use as an soc_ops function pointer. Passes along the
3040 * return value from omap4_prminst_deassert_hardreset(). XXX This
3041 * function is scheduled for removal when the PRM code is moved into
3044 static int _omap4_deassert_hardreset(struct omap_hwmod *oh,
3045 struct omap_hwmod_rst_info *ohri)
3051 pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
3052 oh->name, ohri->name);
3053 return omap_prm_deassert_hardreset(ohri->rst_shift, ohri->rst_shift,
3054 oh->clkdm->pwrdm.ptr->prcm_partition,
3055 oh->clkdm->pwrdm.ptr->prcm_offs,
3056 oh->prcm.omap4.rstctrl_offs,
3057 oh->prcm.omap4.rstctrl_offs +
3058 OMAP4_RST_CTRL_ST_OFFSET);
3062 * _omap4_is_hardreset_asserted - call OMAP4 PRM hardreset fn with hwmod args
3063 * @oh: struct omap_hwmod * to test hardreset
3064 * @ohri: hardreset line data
3066 * Call omap4_prminst_is_hardreset_asserted() with parameters
3067 * extracted from the hwmod @oh and the hardreset line data @ohri.
3068 * Only intended for use as an soc_ops function pointer. Passes along
3069 * the return value from omap4_prminst_is_hardreset_asserted(). XXX
3070 * This function is scheduled for removal when the PRM code is moved
3073 static int _omap4_is_hardreset_asserted(struct omap_hwmod *oh,
3074 struct omap_hwmod_rst_info *ohri)
3079 return omap_prm_is_hardreset_asserted(ohri->rst_shift,
3080 oh->clkdm->pwrdm.ptr->
3082 oh->clkdm->pwrdm.ptr->prcm_offs,
3083 oh->prcm.omap4.rstctrl_offs);
3087 * _am33xx_deassert_hardreset - call AM33XX PRM hardreset fn with hwmod args
3088 * @oh: struct omap_hwmod * to deassert hardreset
3089 * @ohri: hardreset line data
3091 * Call am33xx_prminst_deassert_hardreset() with parameters extracted
3092 * from the hwmod @oh and the hardreset line data @ohri. Only
3093 * intended for use as an soc_ops function pointer. Passes along the
3094 * return value from am33xx_prminst_deassert_hardreset(). XXX This
3095 * function is scheduled for removal when the PRM code is moved into
3098 static int _am33xx_deassert_hardreset(struct omap_hwmod *oh,
3099 struct omap_hwmod_rst_info *ohri)
3101 return omap_prm_deassert_hardreset(ohri->rst_shift, ohri->st_shift,
3102 oh->clkdm->pwrdm.ptr->prcm_partition,
3103 oh->clkdm->pwrdm.ptr->prcm_offs,
3104 oh->prcm.omap4.rstctrl_offs,
3105 oh->prcm.omap4.rstst_offs);
3108 /* Public functions */
3110 u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs)
3112 if (oh->flags & HWMOD_16BIT_REG)
3113 return readw_relaxed(oh->_mpu_rt_va + reg_offs);
3115 return readl_relaxed(oh->_mpu_rt_va + reg_offs);
3118 void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs)
3120 if (oh->flags & HWMOD_16BIT_REG)
3121 writew_relaxed(v, oh->_mpu_rt_va + reg_offs);
3123 writel_relaxed(v, oh->_mpu_rt_va + reg_offs);
3127 * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit
3128 * @oh: struct omap_hwmod *
3130 * This is a public function exposed to drivers. Some drivers may need to do
3131 * some settings before and after resetting the device. Those drivers after
3132 * doing the necessary settings could use this function to start a reset by
3133 * setting the SYSCONFIG.SOFTRESET bit.
3135 int omap_hwmod_softreset(struct omap_hwmod *oh)
3140 if (!oh || !(oh->_sysc_cache))
3143 v = oh->_sysc_cache;
3144 ret = _set_softreset(oh, &v);
3147 _write_sysconfig(v, oh);
3149 ret = _clear_softreset(oh, &v);
3152 _write_sysconfig(v, oh);
3159 * omap_hwmod_lookup - look up a registered omap_hwmod by name
3160 * @name: name of the omap_hwmod to look up
3162 * Given a @name of an omap_hwmod, return a pointer to the registered
3163 * struct omap_hwmod *, or NULL upon error.
3165 struct omap_hwmod *omap_hwmod_lookup(const char *name)
3167 struct omap_hwmod *oh;
3178 * omap_hwmod_for_each - call function for each registered omap_hwmod
3179 * @fn: pointer to a callback function
3180 * @data: void * data to pass to callback function
3182 * Call @fn for each registered omap_hwmod, passing @data to each
3183 * function. @fn must return 0 for success or any other value for
3184 * failure. If @fn returns non-zero, the iteration across omap_hwmods
3185 * will stop and the non-zero return value will be passed to the
3186 * caller of omap_hwmod_for_each(). @fn is called with
3187 * omap_hwmod_for_each() held.
3189 int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
3192 struct omap_hwmod *temp_oh;
3198 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
3199 ret = (*fn)(temp_oh, data);
3208 * omap_hwmod_register_links - register an array of hwmod links
3209 * @ois: pointer to an array of omap_hwmod_ocp_if to register
3211 * Intended to be called early in boot before the clock framework is
3212 * initialized. If @ois is not null, will register all omap_hwmods
3213 * listed in @ois that are valid for this chip. Returns -EINVAL if
3214 * omap_hwmod_init() hasn't been called before calling this function,
3215 * -ENOMEM if the link memory area can't be allocated, or 0 upon
3218 int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois)
3228 if (ois[0] == NULL) /* Empty list */
3232 if (_alloc_linkspace(ois)) {
3233 pr_err("omap_hwmod: could not allocate link space\n");
3240 r = _register_link(ois[i]);
3241 WARN(r && r != -EEXIST,
3242 "omap_hwmod: _register_link(%s -> %s) returned %d\n",
3243 ois[i]->master->name, ois[i]->slave->name, r);
3250 * _ensure_mpu_hwmod_is_setup - ensure the MPU SS hwmod is init'ed and set up
3251 * @oh: pointer to the hwmod currently being set up (usually not the MPU)
3253 * If the hwmod data corresponding to the MPU subsystem IP block
3254 * hasn't been initialized and set up yet, do so now. This must be
3255 * done first since sleep dependencies may be added from other hwmods
3256 * to the MPU. Intended to be called only by omap_hwmod_setup*(). No
3259 static void __init _ensure_mpu_hwmod_is_setup(struct omap_hwmod *oh)
3261 if (!mpu_oh || mpu_oh->_state == _HWMOD_STATE_UNKNOWN)
3262 pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n",
3263 __func__, MPU_INITIATOR_NAME);
3264 else if (mpu_oh->_state == _HWMOD_STATE_REGISTERED && oh != mpu_oh)
3265 omap_hwmod_setup_one(MPU_INITIATOR_NAME);
3269 * omap_hwmod_setup_one - set up a single hwmod
3270 * @oh_name: const char * name of the already-registered hwmod to set up
3272 * Initialize and set up a single hwmod. Intended to be used for a
3273 * small number of early devices, such as the timer IP blocks used for
3274 * the scheduler clock. Must be called after omap2_clk_init().
3275 * Resolves the struct clk names to struct clk pointers for each
3276 * registered omap_hwmod. Also calls _setup() on each hwmod. Returns
3277 * -EINVAL upon error or 0 upon success.
3279 int __init omap_hwmod_setup_one(const char *oh_name)
3281 struct omap_hwmod *oh;
3283 pr_debug("omap_hwmod: %s: %s\n", oh_name, __func__);
3285 oh = _lookup(oh_name);
3287 WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name);
3291 _ensure_mpu_hwmod_is_setup(oh);
3300 * omap_hwmod_setup_all - set up all registered IP blocks
3302 * Initialize and set up all IP blocks registered with the hwmod code.
3303 * Must be called after omap2_clk_init(). Resolves the struct clk
3304 * names to struct clk pointers for each registered omap_hwmod. Also
3305 * calls _setup() on each hwmod. Returns 0 upon success.
3307 static int __init omap_hwmod_setup_all(void)
3309 _ensure_mpu_hwmod_is_setup(NULL);
3311 omap_hwmod_for_each(_init, NULL);
3312 omap_hwmod_for_each(_setup, NULL);
3316 omap_core_initcall(omap_hwmod_setup_all);
3319 * omap_hwmod_enable - enable an omap_hwmod
3320 * @oh: struct omap_hwmod *
3322 * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable().
3323 * Returns -EINVAL on error or passes along the return value from _enable().
3325 int omap_hwmod_enable(struct omap_hwmod *oh)
3328 unsigned long flags;
3333 spin_lock_irqsave(&oh->_lock, flags);
3335 spin_unlock_irqrestore(&oh->_lock, flags);
3341 * omap_hwmod_idle - idle an omap_hwmod
3342 * @oh: struct omap_hwmod *
3344 * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle().
3345 * Returns -EINVAL on error or passes along the return value from _idle().
3347 int omap_hwmod_idle(struct omap_hwmod *oh)
3350 unsigned long flags;
3355 spin_lock_irqsave(&oh->_lock, flags);
3357 spin_unlock_irqrestore(&oh->_lock, flags);
3363 * omap_hwmod_shutdown - shutdown an omap_hwmod
3364 * @oh: struct omap_hwmod *
3366 * Shutdown an omap_hwmod @oh. Intended to be called by
3367 * omap_device_shutdown(). Returns -EINVAL on error or passes along
3368 * the return value from _shutdown().
3370 int omap_hwmod_shutdown(struct omap_hwmod *oh)
3373 unsigned long flags;
3378 spin_lock_irqsave(&oh->_lock, flags);
3380 spin_unlock_irqrestore(&oh->_lock, flags);
3386 * IP block data retrieval functions
3390 * omap_hwmod_count_resources - count number of struct resources needed by hwmod
3391 * @oh: struct omap_hwmod *
3392 * @flags: Type of resources to include when counting (IRQ/DMA/MEM)
3394 * Count the number of struct resource array elements necessary to
3395 * contain omap_hwmod @oh resources. Intended to be called by code
3396 * that registers omap_devices. Intended to be used to determine the
3397 * size of a dynamically-allocated struct resource array, before
3398 * calling omap_hwmod_fill_resources(). Returns the number of struct
3399 * resource array elements needed.
3401 * XXX This code is not optimized. It could attempt to merge adjacent
3405 int omap_hwmod_count_resources(struct omap_hwmod *oh, unsigned long flags)
3409 if (flags & IORESOURCE_IRQ)
3410 ret += _count_mpu_irqs(oh);
3412 if (flags & IORESOURCE_DMA)
3413 ret += _count_sdma_reqs(oh);
3415 if (flags & IORESOURCE_MEM) {
3417 struct omap_hwmod_ocp_if *os;
3418 struct list_head *p = oh->slave_ports.next;
3420 while (i < oh->slaves_cnt) {
3421 os = _fetch_next_ocp_if(&p, &i);
3422 ret += _count_ocp_if_addr_spaces(os);
3430 * omap_hwmod_fill_resources - fill struct resource array with hwmod data
3431 * @oh: struct omap_hwmod *
3432 * @res: pointer to the first element of an array of struct resource to fill
3434 * Fill the struct resource array @res with resource data from the
3435 * omap_hwmod @oh. Intended to be called by code that registers
3436 * omap_devices. See also omap_hwmod_count_resources(). Returns the
3437 * number of array elements filled.
3439 int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
3441 struct omap_hwmod_ocp_if *os;
3442 struct list_head *p;
3443 int i, j, mpu_irqs_cnt, sdma_reqs_cnt, addr_cnt;
3446 /* For each IRQ, DMA, memory area, fill in array.*/
3448 mpu_irqs_cnt = _count_mpu_irqs(oh);
3449 for (i = 0; i < mpu_irqs_cnt; i++) {
3453 irq = oh->xlate_irq((oh->mpu_irqs + i)->irq);
3455 irq = (oh->mpu_irqs + i)->irq;
3456 (res + r)->name = (oh->mpu_irqs + i)->name;
3457 (res + r)->start = irq;
3458 (res + r)->end = irq;
3459 (res + r)->flags = IORESOURCE_IRQ;
3463 sdma_reqs_cnt = _count_sdma_reqs(oh);
3464 for (i = 0; i < sdma_reqs_cnt; i++) {
3465 (res + r)->name = (oh->sdma_reqs + i)->name;
3466 (res + r)->start = (oh->sdma_reqs + i)->dma_req;
3467 (res + r)->end = (oh->sdma_reqs + i)->dma_req;
3468 (res + r)->flags = IORESOURCE_DMA;
3472 p = oh->slave_ports.next;
3475 while (i < oh->slaves_cnt) {
3476 os = _fetch_next_ocp_if(&p, &i);
3477 addr_cnt = _count_ocp_if_addr_spaces(os);
3479 for (j = 0; j < addr_cnt; j++) {
3480 (res + r)->name = (os->addr + j)->name;
3481 (res + r)->start = (os->addr + j)->pa_start;
3482 (res + r)->end = (os->addr + j)->pa_end;
3483 (res + r)->flags = IORESOURCE_MEM;
3492 * omap_hwmod_fill_dma_resources - fill struct resource array with dma data
3493 * @oh: struct omap_hwmod *
3494 * @res: pointer to the array of struct resource to fill
3496 * Fill the struct resource array @res with dma resource data from the
3497 * omap_hwmod @oh. Intended to be called by code that registers
3498 * omap_devices. See also omap_hwmod_count_resources(). Returns the
3499 * number of array elements filled.
3501 int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res)
3503 int i, sdma_reqs_cnt;
3506 sdma_reqs_cnt = _count_sdma_reqs(oh);
3507 for (i = 0; i < sdma_reqs_cnt; i++) {
3508 (res + r)->name = (oh->sdma_reqs + i)->name;
3509 (res + r)->start = (oh->sdma_reqs + i)->dma_req;
3510 (res + r)->end = (oh->sdma_reqs + i)->dma_req;
3511 (res + r)->flags = IORESOURCE_DMA;
3519 * omap_hwmod_get_resource_byname - fetch IP block integration data by name
3520 * @oh: struct omap_hwmod * to operate on
3521 * @type: one of the IORESOURCE_* constants from include/linux/ioport.h
3522 * @name: pointer to the name of the data to fetch (optional)
3523 * @rsrc: pointer to a struct resource, allocated by the caller
3525 * Retrieve MPU IRQ, SDMA request line, or address space start/end
3526 * data for the IP block pointed to by @oh. The data will be filled
3527 * into a struct resource record pointed to by @rsrc. The struct
3528 * resource must be allocated by the caller. When @name is non-null,
3529 * the data associated with the matching entry in the IRQ/SDMA/address
3530 * space hwmod data arrays will be returned. If @name is null, the
3531 * first array entry will be returned. Data order is not meaningful
3532 * in hwmod data, so callers are strongly encouraged to use a non-null
3533 * @name whenever possible to avoid unpredictable effects if hwmod
3534 * data is later added that causes data ordering to change. This
3535 * function is only intended for use by OMAP core code. Device
3536 * drivers should not call this function - the appropriate bus-related
3537 * data accessor functions should be used instead. Returns 0 upon
3538 * success or a negative error code upon error.
3540 int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type,
3541 const char *name, struct resource *rsrc)
3544 unsigned int irq, dma;
3545 u32 pa_start, pa_end;
3550 if (type == IORESOURCE_IRQ) {
3551 r = _get_mpu_irq_by_name(oh, name, &irq);
3557 } else if (type == IORESOURCE_DMA) {
3558 r = _get_sdma_req_by_name(oh, name, &dma);
3564 } else if (type == IORESOURCE_MEM) {
3565 r = _get_addr_space_by_name(oh, name, &pa_start, &pa_end);
3569 rsrc->start = pa_start;
3582 * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain
3583 * @oh: struct omap_hwmod *
3585 * Return the powerdomain pointer associated with the OMAP module
3586 * @oh's main clock. If @oh does not have a main clk, return the
3587 * powerdomain associated with the interface clock associated with the
3588 * module's MPU port. (XXX Perhaps this should use the SDMA port
3589 * instead?) Returns NULL on error, or a struct powerdomain * on
3592 struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh)
3595 struct omap_hwmod_ocp_if *oi;
3596 struct clockdomain *clkdm;
3597 struct clk_hw_omap *clk;
3603 return oh->clkdm->pwrdm.ptr;
3608 oi = _find_mpu_rt_port(oh);
3614 clk = to_clk_hw_omap(__clk_get_hw(c));
3619 return clkdm->pwrdm.ptr;
3623 * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU)
3624 * @oh: struct omap_hwmod *
3626 * Returns the virtual address corresponding to the beginning of the
3627 * module's register target, in the address range that is intended to
3628 * be used by the MPU. Returns the virtual address upon success or NULL
3631 void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh)
3636 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
3639 if (oh->_state == _HWMOD_STATE_UNKNOWN)
3642 return oh->_mpu_rt_va;
3646 * XXX what about functions for drivers to save/restore ocp_sysconfig
3647 * for context save/restore operations?
3651 * omap_hwmod_enable_wakeup - allow device to wake up the system
3652 * @oh: struct omap_hwmod *
3654 * Sets the module OCP socket ENAWAKEUP bit to allow the module to
3655 * send wakeups to the PRCM, and enable I/O ring wakeup events for
3656 * this IP block if it has dynamic mux entries. Eventually this
3657 * should set PRCM wakeup registers to cause the PRCM to receive
3658 * wakeup events from the module. Does not set any wakeup routing
3659 * registers beyond this point - if the module is to wake up any other
3660 * module or subsystem, that must be set separately. Called by
3661 * omap_device code. Returns -EINVAL on error or 0 upon success.
3663 int omap_hwmod_enable_wakeup(struct omap_hwmod *oh)
3665 unsigned long flags;
3668 spin_lock_irqsave(&oh->_lock, flags);
3670 if (oh->class->sysc &&
3671 (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) {
3672 v = oh->_sysc_cache;
3673 _enable_wakeup(oh, &v);
3674 _write_sysconfig(v, oh);
3677 _set_idle_ioring_wakeup(oh, true);
3678 spin_unlock_irqrestore(&oh->_lock, flags);
3684 * omap_hwmod_disable_wakeup - prevent device from waking the system
3685 * @oh: struct omap_hwmod *
3687 * Clears the module OCP socket ENAWAKEUP bit to prevent the module
3688 * from sending wakeups to the PRCM, and disable I/O ring wakeup
3689 * events for this IP block if it has dynamic mux entries. Eventually
3690 * this should clear PRCM wakeup registers to cause the PRCM to ignore
3691 * wakeup events from the module. Does not set any wakeup routing
3692 * registers beyond this point - if the module is to wake up any other
3693 * module or subsystem, that must be set separately. Called by
3694 * omap_device code. Returns -EINVAL on error or 0 upon success.
3696 int omap_hwmod_disable_wakeup(struct omap_hwmod *oh)
3698 unsigned long flags;
3701 spin_lock_irqsave(&oh->_lock, flags);
3703 if (oh->class->sysc &&
3704 (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) {
3705 v = oh->_sysc_cache;
3706 _disable_wakeup(oh, &v);
3707 _write_sysconfig(v, oh);
3710 _set_idle_ioring_wakeup(oh, false);
3711 spin_unlock_irqrestore(&oh->_lock, flags);
3717 * omap_hwmod_assert_hardreset - assert the HW reset line of submodules
3718 * contained in the hwmod module.
3719 * @oh: struct omap_hwmod *
3720 * @name: name of the reset line to lookup and assert
3722 * Some IP like dsp, ipu or iva contain processor that require
3723 * an HW reset line to be assert / deassert in order to enable fully
3724 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3725 * yet supported on this OMAP; otherwise, passes along the return value
3726 * from _assert_hardreset().
3728 int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name)
3731 unsigned long flags;
3736 spin_lock_irqsave(&oh->_lock, flags);
3737 ret = _assert_hardreset(oh, name);
3738 spin_unlock_irqrestore(&oh->_lock, flags);
3744 * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules
3745 * contained in the hwmod module.
3746 * @oh: struct omap_hwmod *
3747 * @name: name of the reset line to look up and deassert
3749 * Some IP like dsp, ipu or iva contain processor that require
3750 * an HW reset line to be assert / deassert in order to enable fully
3751 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3752 * yet supported on this OMAP; otherwise, passes along the return value
3753 * from _deassert_hardreset().
3755 int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name)
3758 unsigned long flags;
3763 spin_lock_irqsave(&oh->_lock, flags);
3764 ret = _deassert_hardreset(oh, name);
3765 spin_unlock_irqrestore(&oh->_lock, flags);
3771 * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname
3772 * @classname: struct omap_hwmod_class name to search for
3773 * @fn: callback function pointer to call for each hwmod in class @classname
3774 * @user: arbitrary context data to pass to the callback function
3776 * For each omap_hwmod of class @classname, call @fn.
3777 * If the callback function returns something other than
3778 * zero, the iterator is terminated, and the callback function's return
3779 * value is passed back to the caller. Returns 0 upon success, -EINVAL
3780 * if @classname or @fn are NULL, or passes back the error code from @fn.
3782 int omap_hwmod_for_each_by_class(const char *classname,
3783 int (*fn)(struct omap_hwmod *oh,
3787 struct omap_hwmod *temp_oh;
3790 if (!classname || !fn)
3793 pr_debug("omap_hwmod: %s: looking for modules of class %s\n",
3794 __func__, classname);
3796 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
3797 if (!strcmp(temp_oh->class->name, classname)) {
3798 pr_debug("omap_hwmod: %s: %s: calling callback fn\n",
3799 __func__, temp_oh->name);
3800 ret = (*fn)(temp_oh, user);
3807 pr_debug("omap_hwmod: %s: iterator terminated early: %d\n",
3814 * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod
3815 * @oh: struct omap_hwmod *
3816 * @state: state that _setup() should leave the hwmod in
3818 * Sets the hwmod state that @oh will enter at the end of _setup()
3819 * (called by omap_hwmod_setup_*()). See also the documentation
3820 * for _setup_postsetup(), above. Returns 0 upon success or
3821 * -EINVAL if there is a problem with the arguments or if the hwmod is
3822 * in the wrong state.
3824 int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state)
3827 unsigned long flags;
3832 if (state != _HWMOD_STATE_DISABLED &&
3833 state != _HWMOD_STATE_ENABLED &&
3834 state != _HWMOD_STATE_IDLE)
3837 spin_lock_irqsave(&oh->_lock, flags);
3839 if (oh->_state != _HWMOD_STATE_REGISTERED) {
3844 oh->_postsetup_state = state;
3848 spin_unlock_irqrestore(&oh->_lock, flags);
3854 * omap_hwmod_get_context_loss_count - get lost context count
3855 * @oh: struct omap_hwmod *
3857 * Returns the context loss count of associated @oh
3858 * upon success, or zero if no context loss data is available.
3860 * On OMAP4, this queries the per-hwmod context loss register,
3861 * assuming one exists. If not, or on OMAP2/3, this queries the
3862 * enclosing powerdomain context loss count.
3864 int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh)
3866 struct powerdomain *pwrdm;
3869 if (soc_ops.get_context_lost)
3870 return soc_ops.get_context_lost(oh);
3872 pwrdm = omap_hwmod_get_pwrdm(oh);
3874 ret = pwrdm_get_context_loss_count(pwrdm);
3880 * omap_hwmod_init - initialize the hwmod code
3882 * Sets up some function pointers needed by the hwmod code to operate on the
3883 * currently-booted SoC. Intended to be called once during kernel init
3884 * before any hwmods are registered. No return value.
3886 void __init omap_hwmod_init(void)
3888 if (cpu_is_omap24xx()) {
3889 soc_ops.wait_target_ready = _omap2xxx_3xxx_wait_target_ready;
3890 soc_ops.assert_hardreset = _omap2_assert_hardreset;
3891 soc_ops.deassert_hardreset = _omap2_deassert_hardreset;
3892 soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted;
3893 } else if (cpu_is_omap34xx()) {
3894 soc_ops.wait_target_ready = _omap2xxx_3xxx_wait_target_ready;
3895 soc_ops.assert_hardreset = _omap2_assert_hardreset;
3896 soc_ops.deassert_hardreset = _omap2_deassert_hardreset;
3897 soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted;
3898 soc_ops.init_clkdm = _init_clkdm;
3899 } else if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) {
3900 soc_ops.enable_module = _omap4_enable_module;
3901 soc_ops.disable_module = _omap4_disable_module;
3902 soc_ops.wait_target_ready = _omap4_wait_target_ready;
3903 soc_ops.assert_hardreset = _omap4_assert_hardreset;
3904 soc_ops.deassert_hardreset = _omap4_deassert_hardreset;
3905 soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted;
3906 soc_ops.init_clkdm = _init_clkdm;
3907 soc_ops.update_context_lost = _omap4_update_context_lost;
3908 soc_ops.get_context_lost = _omap4_get_context_lost;
3909 } else if (cpu_is_ti814x() || cpu_is_ti816x() || soc_is_am33xx() ||
3911 soc_ops.enable_module = _omap4_enable_module;
3912 soc_ops.disable_module = _omap4_disable_module;
3913 soc_ops.wait_target_ready = _omap4_wait_target_ready;
3914 soc_ops.assert_hardreset = _omap4_assert_hardreset;
3915 soc_ops.deassert_hardreset = _am33xx_deassert_hardreset;
3916 soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted;
3917 soc_ops.init_clkdm = _init_clkdm;
3919 WARN(1, "omap_hwmod: unknown SoC type\n");
3926 * omap_hwmod_get_main_clk - get pointer to main clock name
3927 * @oh: struct omap_hwmod *
3929 * Returns the main clock name assocated with @oh upon success,
3930 * or NULL if @oh is NULL.
3932 const char *omap_hwmod_get_main_clk(struct omap_hwmod *oh)
3937 return oh->main_clk;