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 * | (__raw_{read,write}l, 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/delay.h>
135 #include <linux/err.h>
136 #include <linux/list.h>
137 #include <linux/mutex.h>
138 #include <linux/spinlock.h>
139 #include <linux/slab.h>
140 #include <linux/bootmem.h>
143 #include "omap_hwmod.h"
144 #include <plat/prcm.h>
148 #include "clockdomain.h"
149 #include "powerdomain.h"
152 #include "cminst44xx.h"
157 #include "prminst44xx.h"
161 /* Maximum microseconds to wait for OMAP module to softreset */
162 #define MAX_MODULE_SOFTRESET_WAIT 10000
164 /* Name of the OMAP hwmod for the MPU */
165 #define MPU_INITIATOR_NAME "mpu"
168 * Number of struct omap_hwmod_link records per struct
169 * omap_hwmod_ocp_if record (master->slave and slave->master)
171 #define LINKS_PER_OCP_IF 2
174 * struct omap_hwmod_soc_ops - fn ptrs for some SoC-specific operations
175 * @enable_module: function to enable a module (via MODULEMODE)
176 * @disable_module: function to disable a module (via MODULEMODE)
178 * XXX Eventually this functionality will be hidden inside the PRM/CM
179 * device drivers. Until then, this should avoid huge blocks of cpu_is_*()
180 * conditionals in this code.
182 struct omap_hwmod_soc_ops {
183 void (*enable_module)(struct omap_hwmod *oh);
184 int (*disable_module)(struct omap_hwmod *oh);
185 int (*wait_target_ready)(struct omap_hwmod *oh);
186 int (*assert_hardreset)(struct omap_hwmod *oh,
187 struct omap_hwmod_rst_info *ohri);
188 int (*deassert_hardreset)(struct omap_hwmod *oh,
189 struct omap_hwmod_rst_info *ohri);
190 int (*is_hardreset_asserted)(struct omap_hwmod *oh,
191 struct omap_hwmod_rst_info *ohri);
192 int (*init_clkdm)(struct omap_hwmod *oh);
195 /* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */
196 static struct omap_hwmod_soc_ops soc_ops;
198 /* omap_hwmod_list contains all registered struct omap_hwmods */
199 static LIST_HEAD(omap_hwmod_list);
201 /* mpu_oh: used to add/remove MPU initiator from sleepdep list */
202 static struct omap_hwmod *mpu_oh;
204 /* io_chain_lock: used to serialize reconfigurations of the I/O chain */
205 static DEFINE_SPINLOCK(io_chain_lock);
208 * linkspace: ptr to a buffer that struct omap_hwmod_link records are
209 * allocated from - used to reduce the number of small memory
210 * allocations, which has a significant impact on performance
212 static struct omap_hwmod_link *linkspace;
215 * free_ls, max_ls: array indexes into linkspace; representing the
216 * next free struct omap_hwmod_link index, and the maximum number of
217 * struct omap_hwmod_link records allocated (respectively)
219 static unsigned short free_ls, max_ls, ls_supp;
221 /* inited: set to true once the hwmod code is initialized */
224 /* Private functions */
227 * _fetch_next_ocp_if - return the next OCP interface in a list
228 * @p: ptr to a ptr to the list_head inside the ocp_if to return
229 * @i: pointer to the index of the element pointed to by @p in the list
231 * Return a pointer to the struct omap_hwmod_ocp_if record
232 * containing the struct list_head pointed to by @p, and increment
233 * @p such that a future call to this routine will return the next
236 static struct omap_hwmod_ocp_if *_fetch_next_ocp_if(struct list_head **p,
239 struct omap_hwmod_ocp_if *oi;
241 oi = list_entry(*p, struct omap_hwmod_link, node)->ocp_if;
250 * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
251 * @oh: struct omap_hwmod *
253 * Load the current value of the hwmod OCP_SYSCONFIG register into the
254 * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
255 * OCP_SYSCONFIG register or 0 upon success.
257 static int _update_sysc_cache(struct omap_hwmod *oh)
259 if (!oh->class->sysc) {
260 WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name);
264 /* XXX ensure module interface clock is up */
266 oh->_sysc_cache = omap_hwmod_read(oh, oh->class->sysc->sysc_offs);
268 if (!(oh->class->sysc->sysc_flags & SYSC_NO_CACHE))
269 oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED;
275 * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
276 * @v: OCP_SYSCONFIG value to write
277 * @oh: struct omap_hwmod *
279 * Write @v into the module class' OCP_SYSCONFIG register, if it has
280 * one. No return value.
282 static void _write_sysconfig(u32 v, struct omap_hwmod *oh)
284 if (!oh->class->sysc) {
285 WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh->name);
289 /* XXX ensure module interface clock is up */
291 /* Module might have lost context, always update cache and register */
293 omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs);
297 * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
298 * @oh: struct omap_hwmod *
299 * @standbymode: MIDLEMODE field bits
300 * @v: pointer to register contents to modify
302 * Update the master standby mode bits in @v to be @standbymode for
303 * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
304 * upon error or 0 upon success.
306 static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode,
312 if (!oh->class->sysc ||
313 !(oh->class->sysc->sysc_flags & SYSC_HAS_MIDLEMODE))
316 if (!oh->class->sysc->sysc_fields) {
317 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
321 mstandby_shift = oh->class->sysc->sysc_fields->midle_shift;
322 mstandby_mask = (0x3 << mstandby_shift);
324 *v &= ~mstandby_mask;
325 *v |= __ffs(standbymode) << mstandby_shift;
331 * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
332 * @oh: struct omap_hwmod *
333 * @idlemode: SIDLEMODE field bits
334 * @v: pointer to register contents to modify
336 * Update the slave idle mode bits in @v to be @idlemode for the @oh
337 * hwmod. Does not write to the hardware. Returns -EINVAL upon error
340 static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v)
345 if (!oh->class->sysc ||
346 !(oh->class->sysc->sysc_flags & SYSC_HAS_SIDLEMODE))
349 if (!oh->class->sysc->sysc_fields) {
350 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
354 sidle_shift = oh->class->sysc->sysc_fields->sidle_shift;
355 sidle_mask = (0x3 << sidle_shift);
358 *v |= __ffs(idlemode) << sidle_shift;
364 * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
365 * @oh: struct omap_hwmod *
366 * @clockact: CLOCKACTIVITY field bits
367 * @v: pointer to register contents to modify
369 * Update the clockactivity mode bits in @v to be @clockact for the
370 * @oh hwmod. Used for additional powersaving on some modules. Does
371 * not write to the hardware. Returns -EINVAL upon error or 0 upon
374 static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v)
379 if (!oh->class->sysc ||
380 !(oh->class->sysc->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
383 if (!oh->class->sysc->sysc_fields) {
384 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
388 clkact_shift = oh->class->sysc->sysc_fields->clkact_shift;
389 clkact_mask = (0x3 << clkact_shift);
392 *v |= clockact << clkact_shift;
398 * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
399 * @oh: struct omap_hwmod *
400 * @v: pointer to register contents to modify
402 * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
403 * error or 0 upon success.
405 static int _set_softreset(struct omap_hwmod *oh, u32 *v)
409 if (!oh->class->sysc ||
410 !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
413 if (!oh->class->sysc->sysc_fields) {
414 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
418 softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift);
426 * _wait_softreset_complete - wait for an OCP softreset to complete
427 * @oh: struct omap_hwmod * to wait on
429 * Wait until the IP block represented by @oh reports that its OCP
430 * softreset is complete. This can be triggered by software (see
431 * _ocp_softreset()) or by hardware upon returning from off-mode (one
432 * example is HSMMC). Waits for up to MAX_MODULE_SOFTRESET_WAIT
433 * microseconds. Returns the number of microseconds waited.
435 static int _wait_softreset_complete(struct omap_hwmod *oh)
437 struct omap_hwmod_class_sysconfig *sysc;
441 sysc = oh->class->sysc;
443 if (sysc->sysc_flags & SYSS_HAS_RESET_STATUS)
444 omap_test_timeout((omap_hwmod_read(oh, sysc->syss_offs)
445 & SYSS_RESETDONE_MASK),
446 MAX_MODULE_SOFTRESET_WAIT, c);
447 else if (sysc->sysc_flags & SYSC_HAS_RESET_STATUS) {
448 softrst_mask = (0x1 << sysc->sysc_fields->srst_shift);
449 omap_test_timeout(!(omap_hwmod_read(oh, sysc->sysc_offs)
451 MAX_MODULE_SOFTRESET_WAIT, c);
458 * _set_dmadisable: set OCP_SYSCONFIG.DMADISABLE bit in @v
459 * @oh: struct omap_hwmod *
461 * The DMADISABLE bit is a semi-automatic bit present in sysconfig register
462 * of some modules. When the DMA must perform read/write accesses, the
463 * DMADISABLE bit is cleared by the hardware. But when the DMA must stop
464 * for power management, software must set the DMADISABLE bit back to 1.
466 * Set the DMADISABLE bit in @v for hwmod @oh. Returns -EINVAL upon
467 * error or 0 upon success.
469 static int _set_dmadisable(struct omap_hwmod *oh)
474 if (!oh->class->sysc ||
475 !(oh->class->sysc->sysc_flags & SYSC_HAS_DMADISABLE))
478 if (!oh->class->sysc->sysc_fields) {
479 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
483 /* clocks must be on for this operation */
484 if (oh->_state != _HWMOD_STATE_ENABLED) {
485 pr_warn("omap_hwmod: %s: dma can be disabled only from enabled state\n", oh->name);
489 pr_debug("omap_hwmod: %s: setting DMADISABLE\n", oh->name);
493 (0x1 << oh->class->sysc->sysc_fields->dmadisable_shift);
494 v |= dmadisable_mask;
495 _write_sysconfig(v, oh);
501 * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v
502 * @oh: struct omap_hwmod *
503 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
504 * @v: pointer to register contents to modify
506 * Update the module autoidle bit in @v to be @autoidle for the @oh
507 * hwmod. The autoidle bit controls whether the module can gate
508 * internal clocks automatically when it isn't doing anything; the
509 * exact function of this bit varies on a per-module basis. This
510 * function does not write to the hardware. Returns -EINVAL upon
511 * error or 0 upon success.
513 static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle,
519 if (!oh->class->sysc ||
520 !(oh->class->sysc->sysc_flags & SYSC_HAS_AUTOIDLE))
523 if (!oh->class->sysc->sysc_fields) {
524 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
528 autoidle_shift = oh->class->sysc->sysc_fields->autoidle_shift;
529 autoidle_mask = (0x1 << autoidle_shift);
531 *v &= ~autoidle_mask;
532 *v |= autoidle << autoidle_shift;
538 * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux
539 * @oh: struct omap_hwmod *
540 * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable
542 * Set or clear the I/O pad wakeup flag in the mux entries for the
543 * hwmod @oh. This function changes the @oh->mux->pads_dynamic array
544 * in memory. If the hwmod is currently idled, and the new idle
545 * values don't match the previous ones, this function will also
546 * update the SCM PADCTRL registers. Otherwise, if the hwmod is not
547 * currently idled, this function won't touch the hardware: the new
548 * mux settings are written to the SCM PADCTRL registers when the
549 * hwmod is idled. No return value.
551 static void _set_idle_ioring_wakeup(struct omap_hwmod *oh, bool set_wake)
553 struct omap_device_pad *pad;
558 if (!oh->mux || !oh->mux->enabled)
561 for (j = 0; j < oh->mux->nr_pads_dynamic; j++) {
562 pad = oh->mux->pads_dynamic[j];
564 if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP))
567 prev_idle = pad->idle;
570 pad->idle |= OMAP_WAKEUP_EN;
572 pad->idle &= ~OMAP_WAKEUP_EN;
574 if (prev_idle != pad->idle)
578 if (change && oh->_state == _HWMOD_STATE_IDLE)
579 omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);
583 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
584 * @oh: struct omap_hwmod *
586 * Allow the hardware module @oh to send wakeups. Returns -EINVAL
587 * upon error or 0 upon success.
589 static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
591 if (!oh->class->sysc ||
592 !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
593 (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
594 (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
597 if (!oh->class->sysc->sysc_fields) {
598 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
602 if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
603 *v |= 0x1 << oh->class->sysc->sysc_fields->enwkup_shift;
605 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
606 _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
607 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
608 _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
610 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
612 oh->_int_flags |= _HWMOD_WAKEUP_ENABLED;
618 * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
619 * @oh: struct omap_hwmod *
621 * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
622 * upon error or 0 upon success.
624 static int _disable_wakeup(struct omap_hwmod *oh, u32 *v)
626 if (!oh->class->sysc ||
627 !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
628 (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
629 (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
632 if (!oh->class->sysc->sysc_fields) {
633 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name);
637 if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
638 *v &= ~(0x1 << oh->class->sysc->sysc_fields->enwkup_shift);
640 if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
641 _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v);
642 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
643 _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART, v);
645 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
647 oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED;
653 * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
654 * @oh: struct omap_hwmod *
656 * Prevent the hardware module @oh from entering idle while the
657 * hardare module initiator @init_oh is active. Useful when a module
658 * will be accessed by a particular initiator (e.g., if a module will
659 * be accessed by the IVA, there should be a sleepdep between the IVA
660 * initiator and the module). Only applies to modules in smart-idle
661 * mode. If the clockdomain is marked as not needing autodeps, return
662 * 0 without doing anything. Otherwise, returns -EINVAL upon error or
663 * passes along clkdm_add_sleepdep() value upon success.
665 static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
670 if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS)
673 return clkdm_add_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm);
677 * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
678 * @oh: struct omap_hwmod *
680 * Allow the hardware module @oh to enter idle while the hardare
681 * module initiator @init_oh is active. Useful when a module will not
682 * be accessed by a particular initiator (e.g., if a module will not
683 * be accessed by the IVA, there should be no sleepdep between the IVA
684 * initiator and the module). Only applies to modules in smart-idle
685 * mode. If the clockdomain is marked as not needing autodeps, return
686 * 0 without doing anything. Returns -EINVAL upon error or passes
687 * along clkdm_del_sleepdep() value upon success.
689 static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
694 if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS)
697 return clkdm_del_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm);
701 * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
702 * @oh: struct omap_hwmod *
704 * Called from _init_clocks(). Populates the @oh _clk (main
705 * functional clock pointer) if a main_clk is present. Returns 0 on
706 * success or -EINVAL on error.
708 static int _init_main_clk(struct omap_hwmod *oh)
715 oh->_clk = clk_get(NULL, oh->main_clk);
716 if (IS_ERR(oh->_clk)) {
717 pr_warning("omap_hwmod: %s: cannot clk_get main_clk %s\n",
718 oh->name, oh->main_clk);
722 * HACK: This needs a re-visit once clk_prepare() is implemented
723 * to do something meaningful. Today its just a no-op.
724 * If clk_prepare() is used at some point to do things like
725 * voltage scaling etc, then this would have to be moved to
726 * some point where subsystems like i2c and pmic become
729 clk_prepare(oh->_clk);
731 if (!oh->_clk->clkdm)
732 pr_debug("omap_hwmod: %s: missing clockdomain for %s.\n",
733 oh->name, oh->main_clk);
739 * _init_interface_clks - get a struct clk * for the the hwmod's interface clks
740 * @oh: struct omap_hwmod *
742 * Called from _init_clocks(). Populates the @oh OCP slave interface
743 * clock pointers. Returns 0 on success or -EINVAL on error.
745 static int _init_interface_clks(struct omap_hwmod *oh)
747 struct omap_hwmod_ocp_if *os;
753 p = oh->slave_ports.next;
755 while (i < oh->slaves_cnt) {
756 os = _fetch_next_ocp_if(&p, &i);
760 c = clk_get(NULL, os->clk);
762 pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n",
768 * HACK: This needs a re-visit once clk_prepare() is implemented
769 * to do something meaningful. Today its just a no-op.
770 * If clk_prepare() is used at some point to do things like
771 * voltage scaling etc, then this would have to be moved to
772 * some point where subsystems like i2c and pmic become
775 clk_prepare(os->_clk);
782 * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
783 * @oh: struct omap_hwmod *
785 * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
786 * clock pointers. Returns 0 on success or -EINVAL on error.
788 static int _init_opt_clks(struct omap_hwmod *oh)
790 struct omap_hwmod_opt_clk *oc;
795 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) {
796 c = clk_get(NULL, oc->clk);
798 pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n",
804 * HACK: This needs a re-visit once clk_prepare() is implemented
805 * to do something meaningful. Today its just a no-op.
806 * If clk_prepare() is used at some point to do things like
807 * voltage scaling etc, then this would have to be moved to
808 * some point where subsystems like i2c and pmic become
811 clk_prepare(oc->_clk);
818 * _enable_clocks - enable hwmod main clock and interface clocks
819 * @oh: struct omap_hwmod *
821 * Enables all clocks necessary for register reads and writes to succeed
822 * on the hwmod @oh. Returns 0.
824 static int _enable_clocks(struct omap_hwmod *oh)
826 struct omap_hwmod_ocp_if *os;
830 pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
833 clk_enable(oh->_clk);
835 p = oh->slave_ports.next;
837 while (i < oh->slaves_cnt) {
838 os = _fetch_next_ocp_if(&p, &i);
840 if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
841 clk_enable(os->_clk);
844 /* The opt clocks are controlled by the device driver. */
850 * _disable_clocks - disable hwmod main clock and interface clocks
851 * @oh: struct omap_hwmod *
853 * Disables the hwmod @oh main functional and interface clocks. Returns 0.
855 static int _disable_clocks(struct omap_hwmod *oh)
857 struct omap_hwmod_ocp_if *os;
861 pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name);
864 clk_disable(oh->_clk);
866 p = oh->slave_ports.next;
868 while (i < oh->slaves_cnt) {
869 os = _fetch_next_ocp_if(&p, &i);
871 if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE))
872 clk_disable(os->_clk);
875 /* The opt clocks are controlled by the device driver. */
880 static void _enable_optional_clocks(struct omap_hwmod *oh)
882 struct omap_hwmod_opt_clk *oc;
885 pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh->name);
887 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
889 pr_debug("omap_hwmod: enable %s:%s\n", oc->role,
890 __clk_get_name(oc->_clk));
891 clk_enable(oc->_clk);
895 static void _disable_optional_clocks(struct omap_hwmod *oh)
897 struct omap_hwmod_opt_clk *oc;
900 pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh->name);
902 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
904 pr_debug("omap_hwmod: disable %s:%s\n", oc->role,
905 __clk_get_name(oc->_clk));
906 clk_disable(oc->_clk);
911 * _omap4_enable_module - enable CLKCTRL modulemode on OMAP4
912 * @oh: struct omap_hwmod *
914 * Enables the PRCM module mode related to the hwmod @oh.
917 static void _omap4_enable_module(struct omap_hwmod *oh)
919 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
922 pr_debug("omap_hwmod: %s: %s: %d\n",
923 oh->name, __func__, oh->prcm.omap4.modulemode);
925 omap4_cminst_module_enable(oh->prcm.omap4.modulemode,
926 oh->clkdm->prcm_partition,
928 oh->clkdm->clkdm_offs,
929 oh->prcm.omap4.clkctrl_offs);
933 * _am33xx_enable_module - enable CLKCTRL modulemode on AM33XX
934 * @oh: struct omap_hwmod *
936 * Enables the PRCM module mode related to the hwmod @oh.
939 static void _am33xx_enable_module(struct omap_hwmod *oh)
941 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
944 pr_debug("omap_hwmod: %s: %s: %d\n",
945 oh->name, __func__, oh->prcm.omap4.modulemode);
947 am33xx_cm_module_enable(oh->prcm.omap4.modulemode, oh->clkdm->cm_inst,
948 oh->clkdm->clkdm_offs,
949 oh->prcm.omap4.clkctrl_offs);
953 * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4
954 * @oh: struct omap_hwmod *
956 * Wait for a module @oh to enter slave idle. Returns 0 if the module
957 * does not have an IDLEST bit or if the module successfully enters
958 * slave idle; otherwise, pass along the return value of the
959 * appropriate *_cm*_wait_module_idle() function.
961 static int _omap4_wait_target_disable(struct omap_hwmod *oh)
966 if (oh->_int_flags & _HWMOD_NO_MPU_PORT || !oh->clkdm)
969 if (oh->flags & HWMOD_NO_IDLEST)
972 return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition,
974 oh->clkdm->clkdm_offs,
975 oh->prcm.omap4.clkctrl_offs);
979 * _am33xx_wait_target_disable - wait for a module to be disabled on AM33XX
980 * @oh: struct omap_hwmod *
982 * Wait for a module @oh to enter slave idle. Returns 0 if the module
983 * does not have an IDLEST bit or if the module successfully enters
984 * slave idle; otherwise, pass along the return value of the
985 * appropriate *_cm*_wait_module_idle() function.
987 static int _am33xx_wait_target_disable(struct omap_hwmod *oh)
992 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
995 if (oh->flags & HWMOD_NO_IDLEST)
998 return am33xx_cm_wait_module_idle(oh->clkdm->cm_inst,
999 oh->clkdm->clkdm_offs,
1000 oh->prcm.omap4.clkctrl_offs);
1004 * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh
1005 * @oh: struct omap_hwmod *oh
1007 * Count and return the number of MPU IRQs associated with the hwmod
1008 * @oh. Used to allocate struct resource data. Returns 0 if @oh is
1011 static int _count_mpu_irqs(struct omap_hwmod *oh)
1013 struct omap_hwmod_irq_info *ohii;
1016 if (!oh || !oh->mpu_irqs)
1020 ohii = &oh->mpu_irqs[i++];
1021 } while (ohii->irq != -1);
1027 * _count_sdma_reqs - count the number of SDMA request lines associated with @oh
1028 * @oh: struct omap_hwmod *oh
1030 * Count and return the number of SDMA request lines associated with
1031 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1034 static int _count_sdma_reqs(struct omap_hwmod *oh)
1036 struct omap_hwmod_dma_info *ohdi;
1039 if (!oh || !oh->sdma_reqs)
1043 ohdi = &oh->sdma_reqs[i++];
1044 } while (ohdi->dma_req != -1);
1050 * _count_ocp_if_addr_spaces - count the number of address space entries for @oh
1051 * @oh: struct omap_hwmod *oh
1053 * Count and return the number of address space ranges associated with
1054 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1057 static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os)
1059 struct omap_hwmod_addr_space *mem;
1062 if (!os || !os->addr)
1066 mem = &os->addr[i++];
1067 } while (mem->pa_start != mem->pa_end);
1073 * _get_mpu_irq_by_name - fetch MPU interrupt line number by name
1074 * @oh: struct omap_hwmod * to operate on
1075 * @name: pointer to the name of the MPU interrupt number to fetch (optional)
1076 * @irq: pointer to an unsigned int to store the MPU IRQ number to
1078 * Retrieve a MPU hardware IRQ line number named by @name associated
1079 * with the IP block pointed to by @oh. The IRQ number will be filled
1080 * into the address pointed to by @dma. When @name is non-null, the
1081 * IRQ line number associated with the named entry will be returned.
1082 * If @name is null, the first matching entry will be returned. Data
1083 * order is not meaningful in hwmod data, so callers are strongly
1084 * encouraged to use a non-null @name whenever possible to avoid
1085 * unpredictable effects if hwmod data is later added that causes data
1086 * ordering to change. Returns 0 upon success or a negative error
1089 static int _get_mpu_irq_by_name(struct omap_hwmod *oh, const char *name,
1099 while (oh->mpu_irqs[i].irq != -1) {
1100 if (name == oh->mpu_irqs[i].name ||
1101 !strcmp(name, oh->mpu_irqs[i].name)) {
1111 *irq = oh->mpu_irqs[i].irq;
1117 * _get_sdma_req_by_name - fetch SDMA request line ID by name
1118 * @oh: struct omap_hwmod * to operate on
1119 * @name: pointer to the name of the SDMA request line to fetch (optional)
1120 * @dma: pointer to an unsigned int to store the request line ID to
1122 * Retrieve an SDMA request line ID named by @name on the IP block
1123 * pointed to by @oh. The ID will be filled into the address pointed
1124 * to by @dma. When @name is non-null, the request line ID associated
1125 * with the named entry will be returned. If @name is null, the first
1126 * matching entry will be returned. Data order is not meaningful in
1127 * hwmod data, so callers are strongly encouraged to use a non-null
1128 * @name whenever possible to avoid unpredictable effects if hwmod
1129 * data is later added that causes data ordering to change. Returns 0
1130 * upon success or a negative error code upon error.
1132 static int _get_sdma_req_by_name(struct omap_hwmod *oh, const char *name,
1142 while (oh->sdma_reqs[i].dma_req != -1) {
1143 if (name == oh->sdma_reqs[i].name ||
1144 !strcmp(name, oh->sdma_reqs[i].name)) {
1154 *dma = oh->sdma_reqs[i].dma_req;
1160 * _get_addr_space_by_name - fetch address space start & end by name
1161 * @oh: struct omap_hwmod * to operate on
1162 * @name: pointer to the name of the address space to fetch (optional)
1163 * @pa_start: pointer to a u32 to store the starting address to
1164 * @pa_end: pointer to a u32 to store the ending address to
1166 * Retrieve address space start and end addresses for the IP block
1167 * pointed to by @oh. The data will be filled into the addresses
1168 * pointed to by @pa_start and @pa_end. When @name is non-null, the
1169 * address space data associated with the named entry will be
1170 * returned. If @name is null, the first matching entry will be
1171 * returned. Data order is not meaningful in hwmod data, so callers
1172 * are strongly encouraged to use a non-null @name whenever possible
1173 * to avoid unpredictable effects if hwmod data is later added that
1174 * causes data ordering to change. Returns 0 upon success or a
1175 * negative error code upon error.
1177 static int _get_addr_space_by_name(struct omap_hwmod *oh, const char *name,
1178 u32 *pa_start, u32 *pa_end)
1181 struct omap_hwmod_ocp_if *os;
1182 struct list_head *p = NULL;
1185 p = oh->slave_ports.next;
1188 while (i < oh->slaves_cnt) {
1189 os = _fetch_next_ocp_if(&p, &i);
1195 while (os->addr[j].pa_start != os->addr[j].pa_end) {
1196 if (name == os->addr[j].name ||
1197 !strcmp(name, os->addr[j].name)) {
1211 *pa_start = os->addr[j].pa_start;
1212 *pa_end = os->addr[j].pa_end;
1218 * _save_mpu_port_index - find and save the index to @oh's MPU port
1219 * @oh: struct omap_hwmod *
1221 * Determines the array index of the OCP slave port that the MPU uses
1222 * to address the device, and saves it into the struct omap_hwmod.
1223 * Intended to be called during hwmod registration only. No return
1226 static void __init _save_mpu_port_index(struct omap_hwmod *oh)
1228 struct omap_hwmod_ocp_if *os = NULL;
1229 struct list_head *p;
1235 oh->_int_flags |= _HWMOD_NO_MPU_PORT;
1237 p = oh->slave_ports.next;
1239 while (i < oh->slaves_cnt) {
1240 os = _fetch_next_ocp_if(&p, &i);
1241 if (os->user & OCP_USER_MPU) {
1243 oh->_int_flags &= ~_HWMOD_NO_MPU_PORT;
1252 * _find_mpu_rt_port - return omap_hwmod_ocp_if accessible by the MPU
1253 * @oh: struct omap_hwmod *
1255 * Given a pointer to a struct omap_hwmod record @oh, return a pointer
1256 * to the struct omap_hwmod_ocp_if record that is used by the MPU to
1257 * communicate with the IP block. This interface need not be directly
1258 * connected to the MPU (and almost certainly is not), but is directly
1259 * connected to the IP block represented by @oh. Returns a pointer
1260 * to the struct omap_hwmod_ocp_if * upon success, or returns NULL upon
1261 * error or if there does not appear to be a path from the MPU to this
1264 static struct omap_hwmod_ocp_if *_find_mpu_rt_port(struct omap_hwmod *oh)
1266 if (!oh || oh->_int_flags & _HWMOD_NO_MPU_PORT || oh->slaves_cnt == 0)
1269 return oh->_mpu_port;
1273 * _find_mpu_rt_addr_space - return MPU register target address space for @oh
1274 * @oh: struct omap_hwmod *
1276 * Returns a pointer to the struct omap_hwmod_addr_space record representing
1277 * the register target MPU address space; or returns NULL upon error.
1279 static struct omap_hwmod_addr_space * __init _find_mpu_rt_addr_space(struct omap_hwmod *oh)
1281 struct omap_hwmod_ocp_if *os;
1282 struct omap_hwmod_addr_space *mem;
1283 int found = 0, i = 0;
1285 os = _find_mpu_rt_port(oh);
1286 if (!os || !os->addr)
1290 mem = &os->addr[i++];
1291 if (mem->flags & ADDR_TYPE_RT)
1293 } while (!found && mem->pa_start != mem->pa_end);
1295 return (found) ? mem : NULL;
1299 * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG
1300 * @oh: struct omap_hwmod *
1302 * Ensure that the OCP_SYSCONFIG register for the IP block represented
1303 * by @oh is set to indicate to the PRCM that the IP block is active.
1304 * Usually this means placing the module into smart-idle mode and
1305 * smart-standby, but if there is a bug in the automatic idle handling
1306 * for the IP block, it may need to be placed into the force-idle or
1307 * no-idle variants of these modes. No return value.
1309 static void _enable_sysc(struct omap_hwmod *oh)
1315 if (!oh->class->sysc)
1319 * Wait until reset has completed, this is needed as the IP
1320 * block is reset automatically by hardware in some cases
1321 * (off-mode for example), and the drivers require the
1322 * IP to be ready when they access it
1324 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1325 _enable_optional_clocks(oh);
1326 _wait_softreset_complete(oh);
1327 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1328 _disable_optional_clocks(oh);
1330 v = oh->_sysc_cache;
1331 sf = oh->class->sysc->sysc_flags;
1333 if (sf & SYSC_HAS_SIDLEMODE) {
1334 clkdm_act = ((oh->clkdm &&
1335 oh->clkdm->flags & CLKDM_ACTIVE_WITH_MPU) ||
1336 (oh->_clk && oh->_clk->clkdm &&
1337 oh->_clk->clkdm->flags & CLKDM_ACTIVE_WITH_MPU));
1338 if (clkdm_act && !(oh->class->sysc->idlemodes &
1339 (SIDLE_SMART | SIDLE_SMART_WKUP)))
1340 idlemode = HWMOD_IDLEMODE_FORCE;
1342 idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ?
1343 HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
1344 _set_slave_idlemode(oh, idlemode, &v);
1347 if (sf & SYSC_HAS_MIDLEMODE) {
1348 if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
1349 idlemode = HWMOD_IDLEMODE_NO;
1351 if (sf & SYSC_HAS_ENAWAKEUP)
1352 _enable_wakeup(oh, &v);
1353 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
1354 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1356 idlemode = HWMOD_IDLEMODE_SMART;
1358 _set_master_standbymode(oh, idlemode, &v);
1362 * XXX The clock framework should handle this, by
1363 * calling into this code. But this must wait until the
1364 * clock structures are tagged with omap_hwmod entries
1366 if ((oh->flags & HWMOD_SET_DEFAULT_CLOCKACT) &&
1367 (sf & SYSC_HAS_CLOCKACTIVITY))
1368 _set_clockactivity(oh, oh->class->sysc->clockact, &v);
1370 /* If slave is in SMARTIDLE, also enable wakeup */
1371 if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE))
1372 _enable_wakeup(oh, &v);
1374 _write_sysconfig(v, oh);
1377 * Set the autoidle bit only after setting the smartidle bit
1378 * Setting this will not have any impact on the other modules.
1380 if (sf & SYSC_HAS_AUTOIDLE) {
1381 idlemode = (oh->flags & HWMOD_NO_OCP_AUTOIDLE) ?
1383 _set_module_autoidle(oh, idlemode, &v);
1384 _write_sysconfig(v, oh);
1389 * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG
1390 * @oh: struct omap_hwmod *
1392 * If module is marked as SWSUP_SIDLE, force the module into slave
1393 * idle; otherwise, configure it for smart-idle. If module is marked
1394 * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
1395 * configure it for smart-standby. No return value.
1397 static void _idle_sysc(struct omap_hwmod *oh)
1402 if (!oh->class->sysc)
1405 v = oh->_sysc_cache;
1406 sf = oh->class->sysc->sysc_flags;
1408 if (sf & SYSC_HAS_SIDLEMODE) {
1409 /* XXX What about HWMOD_IDLEMODE_SMART_WKUP? */
1410 if (oh->flags & HWMOD_SWSUP_SIDLE ||
1411 !(oh->class->sysc->idlemodes &
1412 (SIDLE_SMART | SIDLE_SMART_WKUP)))
1413 idlemode = HWMOD_IDLEMODE_FORCE;
1415 idlemode = HWMOD_IDLEMODE_SMART;
1416 _set_slave_idlemode(oh, idlemode, &v);
1419 if (sf & SYSC_HAS_MIDLEMODE) {
1420 if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
1421 idlemode = HWMOD_IDLEMODE_FORCE;
1423 if (sf & SYSC_HAS_ENAWAKEUP)
1424 _enable_wakeup(oh, &v);
1425 if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
1426 idlemode = HWMOD_IDLEMODE_SMART_WKUP;
1428 idlemode = HWMOD_IDLEMODE_SMART;
1430 _set_master_standbymode(oh, idlemode, &v);
1433 /* If slave is in SMARTIDLE, also enable wakeup */
1434 if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE))
1435 _enable_wakeup(oh, &v);
1437 _write_sysconfig(v, oh);
1441 * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG
1442 * @oh: struct omap_hwmod *
1444 * Force the module into slave idle and master suspend. No return
1447 static void _shutdown_sysc(struct omap_hwmod *oh)
1452 if (!oh->class->sysc)
1455 v = oh->_sysc_cache;
1456 sf = oh->class->sysc->sysc_flags;
1458 if (sf & SYSC_HAS_SIDLEMODE)
1459 _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v);
1461 if (sf & SYSC_HAS_MIDLEMODE)
1462 _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v);
1464 if (sf & SYSC_HAS_AUTOIDLE)
1465 _set_module_autoidle(oh, 1, &v);
1467 _write_sysconfig(v, oh);
1471 * _lookup - find an omap_hwmod by name
1472 * @name: find an omap_hwmod by name
1474 * Return a pointer to an omap_hwmod by name, or NULL if not found.
1476 static struct omap_hwmod *_lookup(const char *name)
1478 struct omap_hwmod *oh, *temp_oh;
1482 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
1483 if (!strcmp(name, temp_oh->name)) {
1493 * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
1494 * @oh: struct omap_hwmod *
1496 * Convert a clockdomain name stored in a struct omap_hwmod into a
1497 * clockdomain pointer, and save it into the struct omap_hwmod.
1498 * Return -EINVAL if the clkdm_name lookup failed.
1500 static int _init_clkdm(struct omap_hwmod *oh)
1502 if (!oh->clkdm_name) {
1503 pr_debug("omap_hwmod: %s: missing clockdomain\n", oh->name);
1507 oh->clkdm = clkdm_lookup(oh->clkdm_name);
1509 pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n",
1510 oh->name, oh->clkdm_name);
1514 pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
1515 oh->name, oh->clkdm_name);
1521 * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
1522 * well the clockdomain.
1523 * @oh: struct omap_hwmod *
1524 * @data: not used; pass NULL
1526 * Called by omap_hwmod_setup_*() (after omap2_clk_init()).
1527 * Resolves all clock names embedded in the hwmod. Returns 0 on
1528 * success, or a negative error code on failure.
1530 static int _init_clocks(struct omap_hwmod *oh, void *data)
1534 if (oh->_state != _HWMOD_STATE_REGISTERED)
1537 pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name);
1539 ret |= _init_main_clk(oh);
1540 ret |= _init_interface_clks(oh);
1541 ret |= _init_opt_clks(oh);
1542 if (soc_ops.init_clkdm)
1543 ret |= soc_ops.init_clkdm(oh);
1546 oh->_state = _HWMOD_STATE_CLKS_INITED;
1548 pr_warning("omap_hwmod: %s: cannot _init_clocks\n", oh->name);
1554 * _lookup_hardreset - fill register bit info for this hwmod/reset line
1555 * @oh: struct omap_hwmod *
1556 * @name: name of the reset line in the context of this hwmod
1557 * @ohri: struct omap_hwmod_rst_info * that this function will fill in
1559 * Return the bit position of the reset line that match the
1560 * input name. Return -ENOENT if not found.
1562 static int _lookup_hardreset(struct omap_hwmod *oh, const char *name,
1563 struct omap_hwmod_rst_info *ohri)
1567 for (i = 0; i < oh->rst_lines_cnt; i++) {
1568 const char *rst_line = oh->rst_lines[i].name;
1569 if (!strcmp(rst_line, name)) {
1570 ohri->rst_shift = oh->rst_lines[i].rst_shift;
1571 ohri->st_shift = oh->rst_lines[i].st_shift;
1572 pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n",
1573 oh->name, __func__, rst_line, ohri->rst_shift,
1584 * _assert_hardreset - assert the HW reset line of submodules
1585 * contained in the hwmod module.
1586 * @oh: struct omap_hwmod *
1587 * @name: name of the reset line to lookup and assert
1589 * Some IP like dsp, ipu or iva contain processor that require an HW
1590 * reset line to be assert / deassert in order to enable fully the IP.
1591 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1592 * asserting the hardreset line on the currently-booted SoC, or passes
1593 * along the return value from _lookup_hardreset() or the SoC's
1594 * assert_hardreset code.
1596 static int _assert_hardreset(struct omap_hwmod *oh, const char *name)
1598 struct omap_hwmod_rst_info ohri;
1604 if (!soc_ops.assert_hardreset)
1607 ret = _lookup_hardreset(oh, name, &ohri);
1611 ret = soc_ops.assert_hardreset(oh, &ohri);
1617 * _deassert_hardreset - deassert the HW reset line of submodules contained
1618 * in the hwmod module.
1619 * @oh: struct omap_hwmod *
1620 * @name: name of the reset line to look up and deassert
1622 * Some IP like dsp, ipu or iva contain processor that require an HW
1623 * reset line to be assert / deassert in order to enable fully the IP.
1624 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1625 * deasserting the hardreset line on the currently-booted SoC, or passes
1626 * along the return value from _lookup_hardreset() or the SoC's
1627 * deassert_hardreset code.
1629 static int _deassert_hardreset(struct omap_hwmod *oh, const char *name)
1631 struct omap_hwmod_rst_info ohri;
1638 if (!soc_ops.deassert_hardreset)
1641 ret = _lookup_hardreset(oh, name, &ohri);
1642 if (IS_ERR_VALUE(ret))
1647 * A clockdomain must be in SW_SUP otherwise reset
1648 * might not be completed. The clockdomain can be set
1649 * in HW_AUTO only when the module become ready.
1651 hwsup = clkdm_in_hwsup(oh->clkdm);
1652 ret = clkdm_hwmod_enable(oh->clkdm, oh);
1654 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
1655 oh->name, oh->clkdm->name, ret);
1661 if (soc_ops.enable_module)
1662 soc_ops.enable_module(oh);
1664 ret = soc_ops.deassert_hardreset(oh, &ohri);
1666 if (soc_ops.disable_module)
1667 soc_ops.disable_module(oh);
1668 _disable_clocks(oh);
1671 pr_warning("omap_hwmod: %s: failed to hardreset\n", oh->name);
1675 * Set the clockdomain to HW_AUTO, assuming that the
1676 * previous state was HW_AUTO.
1678 if (oh->clkdm && hwsup)
1679 clkdm_allow_idle(oh->clkdm);
1682 clkdm_hwmod_disable(oh->clkdm, oh);
1689 * _read_hardreset - read the HW reset line state of submodules
1690 * contained in the hwmod module
1691 * @oh: struct omap_hwmod *
1692 * @name: name of the reset line to look up and read
1694 * Return the state of the reset line. Returns -EINVAL if @oh is
1695 * null, -ENOSYS if we have no way of reading the hardreset line
1696 * status on the currently-booted SoC, or passes along the return
1697 * value from _lookup_hardreset() or the SoC's is_hardreset_asserted
1700 static int _read_hardreset(struct omap_hwmod *oh, const char *name)
1702 struct omap_hwmod_rst_info ohri;
1708 if (!soc_ops.is_hardreset_asserted)
1711 ret = _lookup_hardreset(oh, name, &ohri);
1715 return soc_ops.is_hardreset_asserted(oh, &ohri);
1719 * _are_all_hardreset_lines_asserted - return true if the @oh is hard-reset
1720 * @oh: struct omap_hwmod *
1722 * If all hardreset lines associated with @oh are asserted, then return true.
1723 * Otherwise, if part of @oh is out hardreset or if no hardreset lines
1724 * associated with @oh are asserted, then return false.
1725 * This function is used to avoid executing some parts of the IP block
1726 * enable/disable sequence if its hardreset line is set.
1728 static bool _are_all_hardreset_lines_asserted(struct omap_hwmod *oh)
1732 if (oh->rst_lines_cnt == 0)
1735 for (i = 0; i < oh->rst_lines_cnt; i++)
1736 if (_read_hardreset(oh, oh->rst_lines[i].name) > 0)
1739 if (oh->rst_lines_cnt == rst_cnt)
1746 * _are_any_hardreset_lines_asserted - return true if any part of @oh is
1748 * @oh: struct omap_hwmod *
1750 * If any hardreset lines associated with @oh are asserted, then
1751 * return true. Otherwise, if no hardreset lines associated with @oh
1752 * are asserted, or if @oh has no hardreset lines, then return false.
1753 * This function is used to avoid executing some parts of the IP block
1754 * enable/disable sequence if any hardreset line is set.
1756 static bool _are_any_hardreset_lines_asserted(struct omap_hwmod *oh)
1761 for (i = 0; i < oh->rst_lines_cnt && rst_cnt == 0; i++)
1762 if (_read_hardreset(oh, oh->rst_lines[i].name) > 0)
1765 return (rst_cnt) ? true : false;
1769 * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
1770 * @oh: struct omap_hwmod *
1772 * Disable the PRCM module mode related to the hwmod @oh.
1773 * Return EINVAL if the modulemode is not supported and 0 in case of success.
1775 static int _omap4_disable_module(struct omap_hwmod *oh)
1779 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
1783 * Since integration code might still be doing something, only
1784 * disable if all lines are under hardreset.
1786 if (_are_any_hardreset_lines_asserted(oh))
1789 pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__);
1791 omap4_cminst_module_disable(oh->clkdm->prcm_partition,
1793 oh->clkdm->clkdm_offs,
1794 oh->prcm.omap4.clkctrl_offs);
1796 v = _omap4_wait_target_disable(oh);
1798 pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
1805 * _am33xx_disable_module - enable CLKCTRL modulemode on AM33XX
1806 * @oh: struct omap_hwmod *
1808 * Disable the PRCM module mode related to the hwmod @oh.
1809 * Return EINVAL if the modulemode is not supported and 0 in case of success.
1811 static int _am33xx_disable_module(struct omap_hwmod *oh)
1815 if (!oh->clkdm || !oh->prcm.omap4.modulemode)
1818 pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__);
1820 if (_are_any_hardreset_lines_asserted(oh))
1823 am33xx_cm_module_disable(oh->clkdm->cm_inst, oh->clkdm->clkdm_offs,
1824 oh->prcm.omap4.clkctrl_offs);
1826 v = _am33xx_wait_target_disable(oh);
1828 pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
1835 * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit
1836 * @oh: struct omap_hwmod *
1838 * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
1839 * enabled for this to work. Returns -ENOENT if the hwmod cannot be
1840 * reset this way, -EINVAL if the hwmod is in the wrong state,
1841 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1843 * In OMAP3 a specific SYSSTATUS register is used to get the reset status.
1844 * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead
1845 * use the SYSCONFIG softreset bit to provide the status.
1847 * Note that some IP like McBSP do have reset control but don't have
1850 static int _ocp_softreset(struct omap_hwmod *oh)
1856 if (!oh->class->sysc ||
1857 !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
1860 /* clocks must be on for this operation */
1861 if (oh->_state != _HWMOD_STATE_ENABLED) {
1862 pr_warn("omap_hwmod: %s: reset can only be entered from enabled state\n",
1867 /* For some modules, all optionnal clocks need to be enabled as well */
1868 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1869 _enable_optional_clocks(oh);
1871 pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh->name);
1873 v = oh->_sysc_cache;
1874 ret = _set_softreset(oh, &v);
1877 _write_sysconfig(v, oh);
1879 if (oh->class->sysc->srst_udelay)
1880 udelay(oh->class->sysc->srst_udelay);
1882 c = _wait_softreset_complete(oh);
1883 if (c == MAX_MODULE_SOFTRESET_WAIT)
1884 pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n",
1885 oh->name, MAX_MODULE_SOFTRESET_WAIT);
1887 pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh->name, c);
1890 * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
1891 * _wait_target_ready() or _reset()
1894 ret = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
1897 if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET)
1898 _disable_optional_clocks(oh);
1904 * _reset - reset an omap_hwmod
1905 * @oh: struct omap_hwmod *
1907 * Resets an omap_hwmod @oh. If the module has a custom reset
1908 * function pointer defined, then call it to reset the IP block, and
1909 * pass along its return value to the caller. Otherwise, if the IP
1910 * block has an OCP_SYSCONFIG register with a SOFTRESET bitfield
1911 * associated with it, call a function to reset the IP block via that
1912 * method, and pass along the return value to the caller. Finally, if
1913 * the IP block has some hardreset lines associated with it, assert
1914 * all of those, but do _not_ deassert them. (This is because driver
1915 * authors have expressed an apparent requirement to control the
1916 * deassertion of the hardreset lines themselves.)
1918 * The default software reset mechanism for most OMAP IP blocks is
1919 * triggered via the OCP_SYSCONFIG.SOFTRESET bit. However, some
1920 * hwmods cannot be reset via this method. Some are not targets and
1921 * therefore have no OCP header registers to access. Others (like the
1922 * IVA) have idiosyncratic reset sequences. So for these relatively
1923 * rare cases, custom reset code can be supplied in the struct
1924 * omap_hwmod_class .reset function pointer.
1926 * _set_dmadisable() is called to set the DMADISABLE bit so that it
1927 * does not prevent idling of the system. This is necessary for cases
1928 * where ROMCODE/BOOTLOADER uses dma and transfers control to the
1929 * kernel without disabling dma.
1931 * Passes along the return value from either _ocp_softreset() or the
1932 * custom reset function - these must return -EINVAL if the hwmod
1933 * cannot be reset this way or if the hwmod is in the wrong state,
1934 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1936 static int _reset(struct omap_hwmod *oh)
1940 pr_debug("omap_hwmod: %s: resetting\n", oh->name);
1942 if (oh->class->reset) {
1943 r = oh->class->reset(oh);
1945 if (oh->rst_lines_cnt > 0) {
1946 for (i = 0; i < oh->rst_lines_cnt; i++)
1947 _assert_hardreset(oh, oh->rst_lines[i].name);
1950 r = _ocp_softreset(oh);
1956 _set_dmadisable(oh);
1959 * OCP_SYSCONFIG bits need to be reprogrammed after a
1960 * softreset. The _enable() function should be split to avoid
1961 * the rewrite of the OCP_SYSCONFIG register.
1963 if (oh->class->sysc) {
1964 _update_sysc_cache(oh);
1972 * _reconfigure_io_chain - clear any I/O chain wakeups and reconfigure chain
1974 * Call the appropriate PRM function to clear any logged I/O chain
1975 * wakeups and to reconfigure the chain. This apparently needs to be
1976 * done upon every mux change. Since hwmods can be concurrently
1977 * enabled and idled, hold a spinlock around the I/O chain
1978 * reconfiguration sequence. No return value.
1980 * XXX When the PRM code is moved to drivers, this function can be removed,
1981 * as the PRM infrastructure should abstract this.
1983 static void _reconfigure_io_chain(void)
1985 unsigned long flags;
1987 spin_lock_irqsave(&io_chain_lock, flags);
1989 if (cpu_is_omap34xx() && omap3_has_io_chain_ctrl())
1990 omap3xxx_prm_reconfigure_io_chain();
1991 else if (cpu_is_omap44xx())
1992 omap44xx_prm_reconfigure_io_chain();
1994 spin_unlock_irqrestore(&io_chain_lock, flags);
1998 * _enable - enable an omap_hwmod
1999 * @oh: struct omap_hwmod *
2001 * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
2002 * register target. Returns -EINVAL if the hwmod is in the wrong
2003 * state or passes along the return value of _wait_target_ready().
2005 static int _enable(struct omap_hwmod *oh)
2010 pr_debug("omap_hwmod: %s: enabling\n", oh->name);
2013 * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled
2014 * state at init. Now that someone is really trying to enable
2015 * them, just ensure that the hwmod mux is set.
2017 if (oh->_int_flags & _HWMOD_SKIP_ENABLE) {
2019 * If the caller has mux data populated, do the mux'ing
2020 * which wouldn't have been done as part of the _enable()
2021 * done during setup.
2024 omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
2026 oh->_int_flags &= ~_HWMOD_SKIP_ENABLE;
2030 if (oh->_state != _HWMOD_STATE_INITIALIZED &&
2031 oh->_state != _HWMOD_STATE_IDLE &&
2032 oh->_state != _HWMOD_STATE_DISABLED) {
2033 WARN(1, "omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state\n",
2039 * If an IP block contains HW reset lines and all of them are
2040 * asserted, we let integration code associated with that
2041 * block handle the enable. We've received very little
2042 * information on what those driver authors need, and until
2043 * detailed information is provided and the driver code is
2044 * posted to the public lists, this is probably the best we
2047 if (_are_all_hardreset_lines_asserted(oh))
2050 /* Mux pins for device runtime if populated */
2051 if (oh->mux && (!oh->mux->enabled ||
2052 ((oh->_state == _HWMOD_STATE_IDLE) &&
2053 oh->mux->pads_dynamic))) {
2054 omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
2055 _reconfigure_io_chain();
2058 _add_initiator_dep(oh, mpu_oh);
2062 * A clockdomain must be in SW_SUP before enabling
2063 * completely the module. The clockdomain can be set
2064 * in HW_AUTO only when the module become ready.
2066 hwsup = clkdm_in_hwsup(oh->clkdm) &&
2067 !clkdm_missing_idle_reporting(oh->clkdm);
2068 r = clkdm_hwmod_enable(oh->clkdm, oh);
2070 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
2071 oh->name, oh->clkdm->name, r);
2077 if (soc_ops.enable_module)
2078 soc_ops.enable_module(oh);
2080 r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) :
2084 * Set the clockdomain to HW_AUTO only if the target is ready,
2085 * assuming that the previous state was HW_AUTO
2087 if (oh->clkdm && hwsup)
2088 clkdm_allow_idle(oh->clkdm);
2090 oh->_state = _HWMOD_STATE_ENABLED;
2092 /* Access the sysconfig only if the target is ready */
2093 if (oh->class->sysc) {
2094 if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED))
2095 _update_sysc_cache(oh);
2099 _omap4_disable_module(oh);
2100 _disable_clocks(oh);
2101 pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n",
2105 clkdm_hwmod_disable(oh->clkdm, oh);
2112 * _idle - idle an omap_hwmod
2113 * @oh: struct omap_hwmod *
2115 * Idles an omap_hwmod @oh. This should be called once the hwmod has
2116 * no further work. Returns -EINVAL if the hwmod is in the wrong
2117 * state or returns 0.
2119 static int _idle(struct omap_hwmod *oh)
2121 pr_debug("omap_hwmod: %s: idling\n", oh->name);
2123 if (oh->_state != _HWMOD_STATE_ENABLED) {
2124 WARN(1, "omap_hwmod: %s: idle state can only be entered from enabled state\n",
2129 if (_are_all_hardreset_lines_asserted(oh))
2132 if (oh->class->sysc)
2134 _del_initiator_dep(oh, mpu_oh);
2136 if (soc_ops.disable_module)
2137 soc_ops.disable_module(oh);
2140 * The module must be in idle mode before disabling any parents
2141 * clocks. Otherwise, the parent clock might be disabled before
2142 * the module transition is done, and thus will prevent the
2143 * transition to complete properly.
2145 _disable_clocks(oh);
2147 clkdm_hwmod_disable(oh->clkdm, oh);
2149 /* Mux pins for device idle if populated */
2150 if (oh->mux && oh->mux->pads_dynamic) {
2151 omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE);
2152 _reconfigure_io_chain();
2155 oh->_state = _HWMOD_STATE_IDLE;
2161 * omap_hwmod_set_ocp_autoidle - set the hwmod's OCP autoidle bit
2162 * @oh: struct omap_hwmod *
2163 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
2165 * Sets the IP block's OCP autoidle bit in hardware, and updates our
2166 * local copy. Intended to be used by drivers that require
2167 * direct manipulation of the AUTOIDLE bits.
2168 * Returns -EINVAL if @oh is null or is not in the ENABLED state, or passes
2169 * along the return value from _set_module_autoidle().
2171 * Any users of this function should be scrutinized carefully.
2173 int omap_hwmod_set_ocp_autoidle(struct omap_hwmod *oh, u8 autoidle)
2177 unsigned long flags;
2179 if (!oh || oh->_state != _HWMOD_STATE_ENABLED)
2182 spin_lock_irqsave(&oh->_lock, flags);
2184 v = oh->_sysc_cache;
2186 retval = _set_module_autoidle(oh, autoidle, &v);
2189 _write_sysconfig(v, oh);
2191 spin_unlock_irqrestore(&oh->_lock, flags);
2197 * _shutdown - shutdown an omap_hwmod
2198 * @oh: struct omap_hwmod *
2200 * Shut down an omap_hwmod @oh. This should be called when the driver
2201 * used for the hwmod is removed or unloaded or if the driver is not
2202 * used by the system. Returns -EINVAL if the hwmod is in the wrong
2203 * state or returns 0.
2205 static int _shutdown(struct omap_hwmod *oh)
2210 if (oh->_state != _HWMOD_STATE_IDLE &&
2211 oh->_state != _HWMOD_STATE_ENABLED) {
2212 WARN(1, "omap_hwmod: %s: disabled state can only be entered from idle, or enabled state\n",
2217 if (_are_all_hardreset_lines_asserted(oh))
2220 pr_debug("omap_hwmod: %s: disabling\n", oh->name);
2222 if (oh->class->pre_shutdown) {
2223 prev_state = oh->_state;
2224 if (oh->_state == _HWMOD_STATE_IDLE)
2226 ret = oh->class->pre_shutdown(oh);
2228 if (prev_state == _HWMOD_STATE_IDLE)
2234 if (oh->class->sysc) {
2235 if (oh->_state == _HWMOD_STATE_IDLE)
2240 /* clocks and deps are already disabled in idle */
2241 if (oh->_state == _HWMOD_STATE_ENABLED) {
2242 _del_initiator_dep(oh, mpu_oh);
2243 /* XXX what about the other system initiators here? dma, dsp */
2244 if (soc_ops.disable_module)
2245 soc_ops.disable_module(oh);
2246 _disable_clocks(oh);
2248 clkdm_hwmod_disable(oh->clkdm, oh);
2250 /* XXX Should this code also force-disable the optional clocks? */
2252 for (i = 0; i < oh->rst_lines_cnt; i++)
2253 _assert_hardreset(oh, oh->rst_lines[i].name);
2255 /* Mux pins to safe mode or use populated off mode values */
2257 omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED);
2259 oh->_state = _HWMOD_STATE_DISABLED;
2265 * _init_mpu_rt_base - populate the virtual address for a hwmod
2266 * @oh: struct omap_hwmod * to locate the virtual address
2268 * Cache the virtual address used by the MPU to access this IP block's
2269 * registers. This address is needed early so the OCP registers that
2270 * are part of the device's address space can be ioremapped properly.
2273 static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
2275 struct omap_hwmod_addr_space *mem;
2276 void __iomem *va_start;
2281 _save_mpu_port_index(oh);
2283 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
2286 mem = _find_mpu_rt_addr_space(oh);
2288 pr_debug("omap_hwmod: %s: no MPU register target found\n",
2293 va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
2295 pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name);
2299 pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
2300 oh->name, va_start);
2302 oh->_mpu_rt_va = va_start;
2306 * _init - initialize internal data for the hwmod @oh
2307 * @oh: struct omap_hwmod *
2310 * Look up the clocks and the address space used by the MPU to access
2311 * registers belonging to the hwmod @oh. @oh must already be
2312 * registered at this point. This is the first of two phases for
2313 * hwmod initialization. Code called here does not touch any hardware
2314 * registers, it simply prepares internal data structures. Returns 0
2315 * upon success or if the hwmod isn't registered, or -EINVAL upon
2318 static int __init _init(struct omap_hwmod *oh, void *data)
2322 if (oh->_state != _HWMOD_STATE_REGISTERED)
2325 _init_mpu_rt_base(oh, NULL);
2327 r = _init_clocks(oh, NULL);
2328 if (IS_ERR_VALUE(r)) {
2329 WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh->name);
2333 oh->_state = _HWMOD_STATE_INITIALIZED;
2339 * _setup_iclk_autoidle - configure an IP block's interface clocks
2340 * @oh: struct omap_hwmod *
2342 * Set up the module's interface clocks. XXX This function is still mostly
2343 * a stub; implementing this properly requires iclk autoidle usecounting in
2344 * the clock code. No return value.
2346 static void __init _setup_iclk_autoidle(struct omap_hwmod *oh)
2348 struct omap_hwmod_ocp_if *os;
2349 struct list_head *p;
2351 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2354 p = oh->slave_ports.next;
2356 while (i < oh->slaves_cnt) {
2357 os = _fetch_next_ocp_if(&p, &i);
2361 if (os->flags & OCPIF_SWSUP_IDLE) {
2362 /* XXX omap_iclk_deny_idle(c); */
2364 /* XXX omap_iclk_allow_idle(c); */
2365 clk_enable(os->_clk);
2373 * _setup_reset - reset an IP block during the setup process
2374 * @oh: struct omap_hwmod *
2376 * Reset the IP block corresponding to the hwmod @oh during the setup
2377 * process. The IP block is first enabled so it can be successfully
2378 * reset. Returns 0 upon success or a negative error code upon
2381 static int __init _setup_reset(struct omap_hwmod *oh)
2385 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2388 if (oh->flags & HWMOD_EXT_OPT_MAIN_CLK)
2391 if (oh->rst_lines_cnt == 0) {
2394 pr_warning("omap_hwmod: %s: cannot be enabled for reset (%d)\n",
2395 oh->name, oh->_state);
2400 if (!(oh->flags & HWMOD_INIT_NO_RESET))
2407 * _setup_postsetup - transition to the appropriate state after _setup
2408 * @oh: struct omap_hwmod *
2410 * Place an IP block represented by @oh into a "post-setup" state --
2411 * either IDLE, ENABLED, or DISABLED. ("post-setup" simply means that
2412 * this function is called at the end of _setup().) The postsetup
2413 * state for an IP block can be changed by calling
2414 * omap_hwmod_enter_postsetup_state() early in the boot process,
2415 * before one of the omap_hwmod_setup*() functions are called for the
2418 * The IP block stays in this state until a PM runtime-based driver is
2419 * loaded for that IP block. A post-setup state of IDLE is
2420 * appropriate for almost all IP blocks with runtime PM-enabled
2421 * drivers, since those drivers are able to enable the IP block. A
2422 * post-setup state of ENABLED is appropriate for kernels with PM
2423 * runtime disabled. The DISABLED state is appropriate for unusual IP
2424 * blocks such as the MPU WDTIMER on kernels without WDTIMER drivers
2425 * included, since the WDTIMER starts running on reset and will reset
2426 * the MPU if left active.
2428 * This post-setup mechanism is deprecated. Once all of the OMAP
2429 * drivers have been converted to use PM runtime, and all of the IP
2430 * block data and interconnect data is available to the hwmod code, it
2431 * should be possible to replace this mechanism with a "lazy reset"
2432 * arrangement. In a "lazy reset" setup, each IP block is enabled
2433 * when the driver first probes, then all remaining IP blocks without
2434 * drivers are either shut down or enabled after the drivers have
2435 * loaded. However, this cannot take place until the above
2436 * preconditions have been met, since otherwise the late reset code
2437 * has no way of knowing which IP blocks are in use by drivers, and
2438 * which ones are unused.
2442 static void __init _setup_postsetup(struct omap_hwmod *oh)
2446 if (oh->rst_lines_cnt > 0)
2449 postsetup_state = oh->_postsetup_state;
2450 if (postsetup_state == _HWMOD_STATE_UNKNOWN)
2451 postsetup_state = _HWMOD_STATE_ENABLED;
2454 * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data -
2455 * it should be set by the core code as a runtime flag during startup
2457 if ((oh->flags & HWMOD_INIT_NO_IDLE) &&
2458 (postsetup_state == _HWMOD_STATE_IDLE)) {
2459 oh->_int_flags |= _HWMOD_SKIP_ENABLE;
2460 postsetup_state = _HWMOD_STATE_ENABLED;
2463 if (postsetup_state == _HWMOD_STATE_IDLE)
2465 else if (postsetup_state == _HWMOD_STATE_DISABLED)
2467 else if (postsetup_state != _HWMOD_STATE_ENABLED)
2468 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2469 oh->name, postsetup_state);
2475 * _setup - prepare IP block hardware for use
2476 * @oh: struct omap_hwmod *
2477 * @n: (unused, pass NULL)
2479 * Configure the IP block represented by @oh. This may include
2480 * enabling the IP block, resetting it, and placing it into a
2481 * post-setup state, depending on the type of IP block and applicable
2482 * flags. IP blocks are reset to prevent any previous configuration
2483 * by the bootloader or previous operating system from interfering
2484 * with power management or other parts of the system. The reset can
2485 * be avoided; see omap_hwmod_no_setup_reset(). This is the second of
2486 * two phases for hwmod initialization. Code called here generally
2487 * affects the IP block hardware, or system integration hardware
2488 * associated with the IP block. Returns 0.
2490 static int __init _setup(struct omap_hwmod *oh, void *data)
2492 if (oh->_state != _HWMOD_STATE_INITIALIZED)
2495 _setup_iclk_autoidle(oh);
2497 if (!_setup_reset(oh))
2498 _setup_postsetup(oh);
2504 * _register - register a struct omap_hwmod
2505 * @oh: struct omap_hwmod *
2507 * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
2508 * already has been registered by the same name; -EINVAL if the
2509 * omap_hwmod is in the wrong state, if @oh is NULL, if the
2510 * omap_hwmod's class field is NULL; if the omap_hwmod is missing a
2511 * name, or if the omap_hwmod's class is missing a name; or 0 upon
2514 * XXX The data should be copied into bootmem, so the original data
2515 * should be marked __initdata and freed after init. This would allow
2516 * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
2517 * that the copy process would be relatively complex due to the large number
2520 static int __init _register(struct omap_hwmod *oh)
2522 if (!oh || !oh->name || !oh->class || !oh->class->name ||
2523 (oh->_state != _HWMOD_STATE_UNKNOWN))
2526 pr_debug("omap_hwmod: %s: registering\n", oh->name);
2528 if (_lookup(oh->name))
2531 list_add_tail(&oh->node, &omap_hwmod_list);
2533 INIT_LIST_HEAD(&oh->master_ports);
2534 INIT_LIST_HEAD(&oh->slave_ports);
2535 spin_lock_init(&oh->_lock);
2537 oh->_state = _HWMOD_STATE_REGISTERED;
2540 * XXX Rather than doing a strcmp(), this should test a flag
2541 * set in the hwmod data, inserted by the autogenerator code.
2543 if (!strcmp(oh->name, MPU_INITIATOR_NAME))
2550 * _alloc_links - return allocated memory for hwmod links
2551 * @ml: pointer to a struct omap_hwmod_link * for the master link
2552 * @sl: pointer to a struct omap_hwmod_link * for the slave link
2554 * Return pointers to two struct omap_hwmod_link records, via the
2555 * addresses pointed to by @ml and @sl. Will first attempt to return
2556 * memory allocated as part of a large initial block, but if that has
2557 * been exhausted, will allocate memory itself. Since ideally this
2558 * second allocation path will never occur, the number of these
2559 * 'supplemental' allocations will be logged when debugging is
2560 * enabled. Returns 0.
2562 static int __init _alloc_links(struct omap_hwmod_link **ml,
2563 struct omap_hwmod_link **sl)
2567 if ((free_ls + LINKS_PER_OCP_IF) <= max_ls) {
2568 *ml = &linkspace[free_ls++];
2569 *sl = &linkspace[free_ls++];
2573 sz = sizeof(struct omap_hwmod_link) * LINKS_PER_OCP_IF;
2576 *ml = alloc_bootmem(sz);
2580 *sl = (void *)(*ml) + sizeof(struct omap_hwmod_link);
2583 pr_debug("omap_hwmod: supplemental link allocations needed: %d\n",
2584 ls_supp * LINKS_PER_OCP_IF);
2590 * _add_link - add an interconnect between two IP blocks
2591 * @oi: pointer to a struct omap_hwmod_ocp_if record
2593 * Add struct omap_hwmod_link records connecting the master IP block
2594 * specified in @oi->master to @oi, and connecting the slave IP block
2595 * specified in @oi->slave to @oi. This code is assumed to run before
2596 * preemption or SMP has been enabled, thus avoiding the need for
2597 * locking in this code. Changes to this assumption will require
2598 * additional locking. Returns 0.
2600 static int __init _add_link(struct omap_hwmod_ocp_if *oi)
2602 struct omap_hwmod_link *ml, *sl;
2604 pr_debug("omap_hwmod: %s -> %s: adding link\n", oi->master->name,
2607 _alloc_links(&ml, &sl);
2610 INIT_LIST_HEAD(&ml->node);
2611 list_add(&ml->node, &oi->master->master_ports);
2612 oi->master->masters_cnt++;
2615 INIT_LIST_HEAD(&sl->node);
2616 list_add(&sl->node, &oi->slave->slave_ports);
2617 oi->slave->slaves_cnt++;
2623 * _register_link - register a struct omap_hwmod_ocp_if
2624 * @oi: struct omap_hwmod_ocp_if *
2626 * Registers the omap_hwmod_ocp_if record @oi. Returns -EEXIST if it
2627 * has already been registered; -EINVAL if @oi is NULL or if the
2628 * record pointed to by @oi is missing required fields; or 0 upon
2631 * XXX The data should be copied into bootmem, so the original data
2632 * should be marked __initdata and freed after init. This would allow
2633 * unneeded omap_hwmods to be freed on multi-OMAP configurations.
2635 static int __init _register_link(struct omap_hwmod_ocp_if *oi)
2637 if (!oi || !oi->master || !oi->slave || !oi->user)
2640 if (oi->_int_flags & _OCPIF_INT_FLAGS_REGISTERED)
2643 pr_debug("omap_hwmod: registering link from %s to %s\n",
2644 oi->master->name, oi->slave->name);
2647 * Register the connected hwmods, if they haven't been
2648 * registered already
2650 if (oi->master->_state != _HWMOD_STATE_REGISTERED)
2651 _register(oi->master);
2653 if (oi->slave->_state != _HWMOD_STATE_REGISTERED)
2654 _register(oi->slave);
2658 oi->_int_flags |= _OCPIF_INT_FLAGS_REGISTERED;
2664 * _alloc_linkspace - allocate large block of hwmod links
2665 * @ois: pointer to an array of struct omap_hwmod_ocp_if records to count
2667 * Allocate a large block of struct omap_hwmod_link records. This
2668 * improves boot time significantly by avoiding the need to allocate
2669 * individual records one by one. If the number of records to
2670 * allocate in the block hasn't been manually specified, this function
2671 * will count the number of struct omap_hwmod_ocp_if records in @ois
2672 * and use that to determine the allocation size. For SoC families
2673 * that require multiple list registrations, such as OMAP3xxx, this
2674 * estimation process isn't optimal, so manual estimation is advised
2675 * in those cases. Returns -EEXIST if the allocation has already occurred
2676 * or 0 upon success.
2678 static int __init _alloc_linkspace(struct omap_hwmod_ocp_if **ois)
2684 WARN(1, "linkspace already allocated\n");
2690 max_ls += LINKS_PER_OCP_IF;
2692 sz = sizeof(struct omap_hwmod_link) * max_ls;
2694 pr_debug("omap_hwmod: %s: allocating %d byte linkspace (%d links)\n",
2695 __func__, sz, max_ls);
2697 linkspace = alloc_bootmem(sz);
2699 memset(linkspace, 0, sz);
2704 /* Static functions intended only for use in soc_ops field function pointers */
2707 * _omap2xxx_wait_target_ready - wait for a module to leave slave idle
2708 * @oh: struct omap_hwmod *
2710 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2711 * does not have an IDLEST bit or if the module successfully leaves
2712 * slave idle; otherwise, pass along the return value of the
2713 * appropriate *_cm*_wait_module_ready() function.
2715 static int _omap2xxx_wait_target_ready(struct omap_hwmod *oh)
2720 if (oh->flags & HWMOD_NO_IDLEST)
2723 if (!_find_mpu_rt_port(oh))
2726 /* XXX check module SIDLEMODE, hardreset status, enabled clocks */
2728 return omap2xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs,
2729 oh->prcm.omap2.idlest_reg_id,
2730 oh->prcm.omap2.idlest_idle_bit);
2734 * _omap3xxx_wait_target_ready - wait for a module to leave slave idle
2735 * @oh: struct omap_hwmod *
2737 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2738 * does not have an IDLEST bit or if the module successfully leaves
2739 * slave idle; otherwise, pass along the return value of the
2740 * appropriate *_cm*_wait_module_ready() function.
2742 static int _omap3xxx_wait_target_ready(struct omap_hwmod *oh)
2747 if (oh->flags & HWMOD_NO_IDLEST)
2750 if (!_find_mpu_rt_port(oh))
2753 /* XXX check module SIDLEMODE, hardreset status, enabled clocks */
2755 return omap3xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs,
2756 oh->prcm.omap2.idlest_reg_id,
2757 oh->prcm.omap2.idlest_idle_bit);
2761 * _omap4_wait_target_ready - wait for a module to leave slave idle
2762 * @oh: struct omap_hwmod *
2764 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2765 * does not have an IDLEST bit or if the module successfully leaves
2766 * slave idle; otherwise, pass along the return value of the
2767 * appropriate *_cm*_wait_module_ready() function.
2769 static int _omap4_wait_target_ready(struct omap_hwmod *oh)
2774 if (oh->flags & HWMOD_NO_IDLEST || !oh->clkdm)
2777 if (!_find_mpu_rt_port(oh))
2780 /* XXX check module SIDLEMODE, hardreset status */
2782 return omap4_cminst_wait_module_ready(oh->clkdm->prcm_partition,
2784 oh->clkdm->clkdm_offs,
2785 oh->prcm.omap4.clkctrl_offs);
2789 * _am33xx_wait_target_ready - wait for a module to leave slave idle
2790 * @oh: struct omap_hwmod *
2792 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2793 * does not have an IDLEST bit or if the module successfully leaves
2794 * slave idle; otherwise, pass along the return value of the
2795 * appropriate *_cm*_wait_module_ready() function.
2797 static int _am33xx_wait_target_ready(struct omap_hwmod *oh)
2799 if (!oh || !oh->clkdm)
2802 if (oh->flags & HWMOD_NO_IDLEST)
2805 if (!_find_mpu_rt_port(oh))
2808 /* XXX check module SIDLEMODE, hardreset status */
2810 return am33xx_cm_wait_module_ready(oh->clkdm->cm_inst,
2811 oh->clkdm->clkdm_offs,
2812 oh->prcm.omap4.clkctrl_offs);
2816 * _omap2_assert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2817 * @oh: struct omap_hwmod * to assert hardreset
2818 * @ohri: hardreset line data
2820 * Call omap2_prm_assert_hardreset() with parameters extracted from
2821 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2822 * use as an soc_ops function pointer. Passes along the return value
2823 * from omap2_prm_assert_hardreset(). XXX This function is scheduled
2824 * for removal when the PRM code is moved into drivers/.
2826 static int _omap2_assert_hardreset(struct omap_hwmod *oh,
2827 struct omap_hwmod_rst_info *ohri)
2829 return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs,
2834 * _omap2_deassert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2835 * @oh: struct omap_hwmod * to deassert hardreset
2836 * @ohri: hardreset line data
2838 * Call omap2_prm_deassert_hardreset() with parameters extracted from
2839 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2840 * use as an soc_ops function pointer. Passes along the return value
2841 * from omap2_prm_deassert_hardreset(). XXX This function is
2842 * scheduled for removal when the PRM code is moved into drivers/.
2844 static int _omap2_deassert_hardreset(struct omap_hwmod *oh,
2845 struct omap_hwmod_rst_info *ohri)
2847 return omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs,
2853 * _omap2_is_hardreset_asserted - call OMAP2 PRM hardreset fn with hwmod args
2854 * @oh: struct omap_hwmod * to test hardreset
2855 * @ohri: hardreset line data
2857 * Call omap2_prm_is_hardreset_asserted() with parameters extracted
2858 * from the hwmod @oh and the hardreset line data @ohri. Only
2859 * intended for use as an soc_ops function pointer. Passes along the
2860 * return value from omap2_prm_is_hardreset_asserted(). XXX This
2861 * function is scheduled for removal when the PRM code is moved into
2864 static int _omap2_is_hardreset_asserted(struct omap_hwmod *oh,
2865 struct omap_hwmod_rst_info *ohri)
2867 return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs,
2872 * _omap4_assert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
2873 * @oh: struct omap_hwmod * to assert hardreset
2874 * @ohri: hardreset line data
2876 * Call omap4_prminst_assert_hardreset() with parameters extracted
2877 * from the hwmod @oh and the hardreset line data @ohri. Only
2878 * intended for use as an soc_ops function pointer. Passes along the
2879 * return value from omap4_prminst_assert_hardreset(). XXX This
2880 * function is scheduled for removal when the PRM code is moved into
2883 static int _omap4_assert_hardreset(struct omap_hwmod *oh,
2884 struct omap_hwmod_rst_info *ohri)
2889 return omap4_prminst_assert_hardreset(ohri->rst_shift,
2890 oh->clkdm->pwrdm.ptr->prcm_partition,
2891 oh->clkdm->pwrdm.ptr->prcm_offs,
2892 oh->prcm.omap4.rstctrl_offs);
2896 * _omap4_deassert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
2897 * @oh: struct omap_hwmod * to deassert hardreset
2898 * @ohri: hardreset line data
2900 * Call omap4_prminst_deassert_hardreset() with parameters extracted
2901 * from the hwmod @oh and the hardreset line data @ohri. Only
2902 * intended for use as an soc_ops function pointer. Passes along the
2903 * return value from omap4_prminst_deassert_hardreset(). XXX This
2904 * function is scheduled for removal when the PRM code is moved into
2907 static int _omap4_deassert_hardreset(struct omap_hwmod *oh,
2908 struct omap_hwmod_rst_info *ohri)
2914 pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
2915 oh->name, ohri->name);
2916 return omap4_prminst_deassert_hardreset(ohri->rst_shift,
2917 oh->clkdm->pwrdm.ptr->prcm_partition,
2918 oh->clkdm->pwrdm.ptr->prcm_offs,
2919 oh->prcm.omap4.rstctrl_offs);
2923 * _omap4_is_hardreset_asserted - call OMAP4 PRM hardreset fn with hwmod args
2924 * @oh: struct omap_hwmod * to test hardreset
2925 * @ohri: hardreset line data
2927 * Call omap4_prminst_is_hardreset_asserted() with parameters
2928 * extracted from the hwmod @oh and the hardreset line data @ohri.
2929 * Only intended for use as an soc_ops function pointer. Passes along
2930 * the return value from omap4_prminst_is_hardreset_asserted(). XXX
2931 * This function is scheduled for removal when the PRM code is moved
2934 static int _omap4_is_hardreset_asserted(struct omap_hwmod *oh,
2935 struct omap_hwmod_rst_info *ohri)
2940 return omap4_prminst_is_hardreset_asserted(ohri->rst_shift,
2941 oh->clkdm->pwrdm.ptr->prcm_partition,
2942 oh->clkdm->pwrdm.ptr->prcm_offs,
2943 oh->prcm.omap4.rstctrl_offs);
2947 * _am33xx_assert_hardreset - call AM33XX PRM hardreset fn with hwmod args
2948 * @oh: struct omap_hwmod * to assert hardreset
2949 * @ohri: hardreset line data
2951 * Call am33xx_prminst_assert_hardreset() with parameters extracted
2952 * from the hwmod @oh and the hardreset line data @ohri. Only
2953 * intended for use as an soc_ops function pointer. Passes along the
2954 * return value from am33xx_prminst_assert_hardreset(). XXX This
2955 * function is scheduled for removal when the PRM code is moved into
2958 static int _am33xx_assert_hardreset(struct omap_hwmod *oh,
2959 struct omap_hwmod_rst_info *ohri)
2962 return am33xx_prm_assert_hardreset(ohri->rst_shift,
2963 oh->clkdm->pwrdm.ptr->prcm_offs,
2964 oh->prcm.omap4.rstctrl_offs);
2968 * _am33xx_deassert_hardreset - call AM33XX PRM hardreset fn with hwmod args
2969 * @oh: struct omap_hwmod * to deassert hardreset
2970 * @ohri: hardreset line data
2972 * Call am33xx_prminst_deassert_hardreset() with parameters extracted
2973 * from the hwmod @oh and the hardreset line data @ohri. Only
2974 * intended for use as an soc_ops function pointer. Passes along the
2975 * return value from am33xx_prminst_deassert_hardreset(). XXX This
2976 * function is scheduled for removal when the PRM code is moved into
2979 static int _am33xx_deassert_hardreset(struct omap_hwmod *oh,
2980 struct omap_hwmod_rst_info *ohri)
2983 pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
2984 oh->name, ohri->name);
2986 return am33xx_prm_deassert_hardreset(ohri->rst_shift,
2987 oh->clkdm->pwrdm.ptr->prcm_offs,
2988 oh->prcm.omap4.rstctrl_offs,
2989 oh->prcm.omap4.rstst_offs);
2993 * _am33xx_is_hardreset_asserted - call AM33XX PRM hardreset fn with hwmod args
2994 * @oh: struct omap_hwmod * to test hardreset
2995 * @ohri: hardreset line data
2997 * Call am33xx_prminst_is_hardreset_asserted() with parameters
2998 * extracted from the hwmod @oh and the hardreset line data @ohri.
2999 * Only intended for use as an soc_ops function pointer. Passes along
3000 * the return value from am33xx_prminst_is_hardreset_asserted(). XXX
3001 * This function is scheduled for removal when the PRM code is moved
3004 static int _am33xx_is_hardreset_asserted(struct omap_hwmod *oh,
3005 struct omap_hwmod_rst_info *ohri)
3007 return am33xx_prm_is_hardreset_asserted(ohri->rst_shift,
3008 oh->clkdm->pwrdm.ptr->prcm_offs,
3009 oh->prcm.omap4.rstctrl_offs);
3012 /* Public functions */
3014 u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs)
3016 if (oh->flags & HWMOD_16BIT_REG)
3017 return __raw_readw(oh->_mpu_rt_va + reg_offs);
3019 return __raw_readl(oh->_mpu_rt_va + reg_offs);
3022 void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs)
3024 if (oh->flags & HWMOD_16BIT_REG)
3025 __raw_writew(v, oh->_mpu_rt_va + reg_offs);
3027 __raw_writel(v, oh->_mpu_rt_va + reg_offs);
3031 * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit
3032 * @oh: struct omap_hwmod *
3034 * This is a public function exposed to drivers. Some drivers may need to do
3035 * some settings before and after resetting the device. Those drivers after
3036 * doing the necessary settings could use this function to start a reset by
3037 * setting the SYSCONFIG.SOFTRESET bit.
3039 int omap_hwmod_softreset(struct omap_hwmod *oh)
3044 if (!oh || !(oh->_sysc_cache))
3047 v = oh->_sysc_cache;
3048 ret = _set_softreset(oh, &v);
3051 _write_sysconfig(v, oh);
3058 * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode
3059 * @oh: struct omap_hwmod *
3060 * @idlemode: SIDLEMODE field bits (shifted to bit 0)
3062 * Sets the IP block's OCP slave idlemode in hardware, and updates our
3063 * local copy. Intended to be used by drivers that have some erratum
3064 * that requires direct manipulation of the SIDLEMODE bits. Returns
3065 * -EINVAL if @oh is null, or passes along the return value from
3066 * _set_slave_idlemode().
3068 * XXX Does this function have any current users? If not, we should
3069 * remove it; it is better to let the rest of the hwmod code handle this.
3070 * Any users of this function should be scrutinized carefully.
3072 int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode)
3080 v = oh->_sysc_cache;
3082 retval = _set_slave_idlemode(oh, idlemode, &v);
3084 _write_sysconfig(v, oh);
3090 * omap_hwmod_lookup - look up a registered omap_hwmod by name
3091 * @name: name of the omap_hwmod to look up
3093 * Given a @name of an omap_hwmod, return a pointer to the registered
3094 * struct omap_hwmod *, or NULL upon error.
3096 struct omap_hwmod *omap_hwmod_lookup(const char *name)
3098 struct omap_hwmod *oh;
3109 * omap_hwmod_for_each - call function for each registered omap_hwmod
3110 * @fn: pointer to a callback function
3111 * @data: void * data to pass to callback function
3113 * Call @fn for each registered omap_hwmod, passing @data to each
3114 * function. @fn must return 0 for success or any other value for
3115 * failure. If @fn returns non-zero, the iteration across omap_hwmods
3116 * will stop and the non-zero return value will be passed to the
3117 * caller of omap_hwmod_for_each(). @fn is called with
3118 * omap_hwmod_for_each() held.
3120 int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
3123 struct omap_hwmod *temp_oh;
3129 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
3130 ret = (*fn)(temp_oh, data);
3139 * omap_hwmod_register_links - register an array of hwmod links
3140 * @ois: pointer to an array of omap_hwmod_ocp_if to register
3142 * Intended to be called early in boot before the clock framework is
3143 * initialized. If @ois is not null, will register all omap_hwmods
3144 * listed in @ois that are valid for this chip. Returns -EINVAL if
3145 * omap_hwmod_init() hasn't been called before calling this function,
3146 * -ENOMEM if the link memory area can't be allocated, or 0 upon
3149 int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois)
3160 if (_alloc_linkspace(ois)) {
3161 pr_err("omap_hwmod: could not allocate link space\n");
3168 r = _register_link(ois[i]);
3169 WARN(r && r != -EEXIST,
3170 "omap_hwmod: _register_link(%s -> %s) returned %d\n",
3171 ois[i]->master->name, ois[i]->slave->name, r);
3178 * _ensure_mpu_hwmod_is_setup - ensure the MPU SS hwmod is init'ed and set up
3179 * @oh: pointer to the hwmod currently being set up (usually not the MPU)
3181 * If the hwmod data corresponding to the MPU subsystem IP block
3182 * hasn't been initialized and set up yet, do so now. This must be
3183 * done first since sleep dependencies may be added from other hwmods
3184 * to the MPU. Intended to be called only by omap_hwmod_setup*(). No
3187 static void __init _ensure_mpu_hwmod_is_setup(struct omap_hwmod *oh)
3189 if (!mpu_oh || mpu_oh->_state == _HWMOD_STATE_UNKNOWN)
3190 pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n",
3191 __func__, MPU_INITIATOR_NAME);
3192 else if (mpu_oh->_state == _HWMOD_STATE_REGISTERED && oh != mpu_oh)
3193 omap_hwmod_setup_one(MPU_INITIATOR_NAME);
3197 * omap_hwmod_setup_one - set up a single hwmod
3198 * @oh_name: const char * name of the already-registered hwmod to set up
3200 * Initialize and set up a single hwmod. Intended to be used for a
3201 * small number of early devices, such as the timer IP blocks used for
3202 * the scheduler clock. Must be called after omap2_clk_init().
3203 * Resolves the struct clk names to struct clk pointers for each
3204 * registered omap_hwmod. Also calls _setup() on each hwmod. Returns
3205 * -EINVAL upon error or 0 upon success.
3207 int __init omap_hwmod_setup_one(const char *oh_name)
3209 struct omap_hwmod *oh;
3211 pr_debug("omap_hwmod: %s: %s\n", oh_name, __func__);
3213 oh = _lookup(oh_name);
3215 WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name);
3219 _ensure_mpu_hwmod_is_setup(oh);
3228 * omap_hwmod_setup_all - set up all registered IP blocks
3230 * Initialize and set up all IP blocks registered with the hwmod code.
3231 * Must be called after omap2_clk_init(). Resolves the struct clk
3232 * names to struct clk pointers for each registered omap_hwmod. Also
3233 * calls _setup() on each hwmod. Returns 0 upon success.
3235 static int __init omap_hwmod_setup_all(void)
3237 _ensure_mpu_hwmod_is_setup(NULL);
3239 omap_hwmod_for_each(_init, NULL);
3240 omap_hwmod_for_each(_setup, NULL);
3244 core_initcall(omap_hwmod_setup_all);
3247 * omap_hwmod_enable - enable an omap_hwmod
3248 * @oh: struct omap_hwmod *
3250 * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable().
3251 * Returns -EINVAL on error or passes along the return value from _enable().
3253 int omap_hwmod_enable(struct omap_hwmod *oh)
3256 unsigned long flags;
3261 spin_lock_irqsave(&oh->_lock, flags);
3263 spin_unlock_irqrestore(&oh->_lock, flags);
3269 * omap_hwmod_idle - idle an omap_hwmod
3270 * @oh: struct omap_hwmod *
3272 * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle().
3273 * Returns -EINVAL on error or passes along the return value from _idle().
3275 int omap_hwmod_idle(struct omap_hwmod *oh)
3277 unsigned long flags;
3282 spin_lock_irqsave(&oh->_lock, flags);
3284 spin_unlock_irqrestore(&oh->_lock, flags);
3290 * omap_hwmod_shutdown - shutdown an omap_hwmod
3291 * @oh: struct omap_hwmod *
3293 * Shutdown an omap_hwmod @oh. Intended to be called by
3294 * omap_device_shutdown(). Returns -EINVAL on error or passes along
3295 * the return value from _shutdown().
3297 int omap_hwmod_shutdown(struct omap_hwmod *oh)
3299 unsigned long flags;
3304 spin_lock_irqsave(&oh->_lock, flags);
3306 spin_unlock_irqrestore(&oh->_lock, flags);
3312 * omap_hwmod_enable_clocks - enable main_clk, all interface clocks
3313 * @oh: struct omap_hwmod *oh
3315 * Intended to be called by the omap_device code.
3317 int omap_hwmod_enable_clocks(struct omap_hwmod *oh)
3319 unsigned long flags;
3321 spin_lock_irqsave(&oh->_lock, flags);
3323 spin_unlock_irqrestore(&oh->_lock, flags);
3329 * omap_hwmod_disable_clocks - disable main_clk, all interface clocks
3330 * @oh: struct omap_hwmod *oh
3332 * Intended to be called by the omap_device code.
3334 int omap_hwmod_disable_clocks(struct omap_hwmod *oh)
3336 unsigned long flags;
3338 spin_lock_irqsave(&oh->_lock, flags);
3339 _disable_clocks(oh);
3340 spin_unlock_irqrestore(&oh->_lock, flags);
3346 * omap_hwmod_ocp_barrier - wait for posted writes against the hwmod to complete
3347 * @oh: struct omap_hwmod *oh
3349 * Intended to be called by drivers and core code when all posted
3350 * writes to a device must complete before continuing further
3351 * execution (for example, after clearing some device IRQSTATUS
3354 * XXX what about targets with multiple OCP threads?
3356 void omap_hwmod_ocp_barrier(struct omap_hwmod *oh)
3360 if (!oh->class->sysc || !oh->class->sysc->sysc_flags) {
3361 WARN(1, "omap_device: %s: OCP barrier impossible due to device configuration\n",
3367 * Forces posted writes to complete on the OCP thread handling
3370 omap_hwmod_read(oh, oh->class->sysc->sysc_offs);
3374 * omap_hwmod_reset - reset the hwmod
3375 * @oh: struct omap_hwmod *
3377 * Under some conditions, a driver may wish to reset the entire device.
3378 * Called from omap_device code. Returns -EINVAL on error or passes along
3379 * the return value from _reset().
3381 int omap_hwmod_reset(struct omap_hwmod *oh)
3384 unsigned long flags;
3389 spin_lock_irqsave(&oh->_lock, flags);
3391 spin_unlock_irqrestore(&oh->_lock, flags);
3397 * IP block data retrieval functions
3401 * omap_hwmod_count_resources - count number of struct resources needed by hwmod
3402 * @oh: struct omap_hwmod *
3403 * @res: pointer to the first element of an array of struct resource to fill
3405 * Count the number of struct resource array elements necessary to
3406 * contain omap_hwmod @oh resources. Intended to be called by code
3407 * that registers omap_devices. Intended to be used to determine the
3408 * size of a dynamically-allocated struct resource array, before
3409 * calling omap_hwmod_fill_resources(). Returns the number of struct
3410 * resource array elements needed.
3412 * XXX This code is not optimized. It could attempt to merge adjacent
3416 int omap_hwmod_count_resources(struct omap_hwmod *oh)
3418 struct omap_hwmod_ocp_if *os;
3419 struct list_head *p;
3423 ret = _count_mpu_irqs(oh) + _count_sdma_reqs(oh);
3425 p = oh->slave_ports.next;
3427 while (i < oh->slaves_cnt) {
3428 os = _fetch_next_ocp_if(&p, &i);
3429 ret += _count_ocp_if_addr_spaces(os);
3436 * omap_hwmod_fill_resources - fill struct resource array with hwmod data
3437 * @oh: struct omap_hwmod *
3438 * @res: pointer to the first element of an array of struct resource to fill
3440 * Fill the struct resource array @res with resource data from the
3441 * omap_hwmod @oh. Intended to be called by code that registers
3442 * omap_devices. See also omap_hwmod_count_resources(). Returns the
3443 * number of array elements filled.
3445 int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
3447 struct omap_hwmod_ocp_if *os;
3448 struct list_head *p;
3449 int i, j, mpu_irqs_cnt, sdma_reqs_cnt, addr_cnt;
3452 /* For each IRQ, DMA, memory area, fill in array.*/
3454 mpu_irqs_cnt = _count_mpu_irqs(oh);
3455 for (i = 0; i < mpu_irqs_cnt; i++) {
3456 (res + r)->name = (oh->mpu_irqs + i)->name;
3457 (res + r)->start = (oh->mpu_irqs + i)->irq;
3458 (res + r)->end = (oh->mpu_irqs + i)->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;
3603 oi = _find_mpu_rt_port(oh);
3612 return c->clkdm->pwrdm.ptr;
3617 * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU)
3618 * @oh: struct omap_hwmod *
3620 * Returns the virtual address corresponding to the beginning of the
3621 * module's register target, in the address range that is intended to
3622 * be used by the MPU. Returns the virtual address upon success or NULL
3625 void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh)
3630 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
3633 if (oh->_state == _HWMOD_STATE_UNKNOWN)
3636 return oh->_mpu_rt_va;
3640 * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh
3641 * @oh: struct omap_hwmod *
3642 * @init_oh: struct omap_hwmod * (initiator)
3644 * Add a sleep dependency between the initiator @init_oh and @oh.
3645 * Intended to be called by DSP/Bridge code via platform_data for the
3646 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
3647 * code needs to add/del initiator dependencies dynamically
3648 * before/after accessing a device. Returns the return value from
3649 * _add_initiator_dep().
3651 * XXX Keep a usecount in the clockdomain code
3653 int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
3654 struct omap_hwmod *init_oh)
3656 return _add_initiator_dep(oh, init_oh);
3660 * XXX what about functions for drivers to save/restore ocp_sysconfig
3661 * for context save/restore operations?
3665 * omap_hwmod_del_initiator_dep - remove sleepdep from @init_oh to @oh
3666 * @oh: struct omap_hwmod *
3667 * @init_oh: struct omap_hwmod * (initiator)
3669 * Remove a sleep dependency between the initiator @init_oh and @oh.
3670 * Intended to be called by DSP/Bridge code via platform_data for the
3671 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
3672 * code needs to add/del initiator dependencies dynamically
3673 * before/after accessing a device. Returns the return value from
3674 * _del_initiator_dep().
3676 * XXX Keep a usecount in the clockdomain code
3678 int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
3679 struct omap_hwmod *init_oh)
3681 return _del_initiator_dep(oh, init_oh);
3685 * omap_hwmod_enable_wakeup - allow device to wake up the system
3686 * @oh: struct omap_hwmod *
3688 * Sets the module OCP socket ENAWAKEUP bit to allow the module to
3689 * send wakeups to the PRCM, and enable I/O ring wakeup events for
3690 * this IP block if it has dynamic mux entries. Eventually this
3691 * should set PRCM wakeup registers to cause the PRCM to receive
3692 * wakeup events from the module. Does not set any wakeup routing
3693 * registers beyond this point - if the module is to wake up any other
3694 * module or subsystem, that must be set separately. Called by
3695 * omap_device code. Returns -EINVAL on error or 0 upon success.
3697 int omap_hwmod_enable_wakeup(struct omap_hwmod *oh)
3699 unsigned long flags;
3702 spin_lock_irqsave(&oh->_lock, flags);
3704 if (oh->class->sysc &&
3705 (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) {
3706 v = oh->_sysc_cache;
3707 _enable_wakeup(oh, &v);
3708 _write_sysconfig(v, oh);
3711 _set_idle_ioring_wakeup(oh, true);
3712 spin_unlock_irqrestore(&oh->_lock, flags);
3718 * omap_hwmod_disable_wakeup - prevent device from waking the system
3719 * @oh: struct omap_hwmod *
3721 * Clears the module OCP socket ENAWAKEUP bit to prevent the module
3722 * from sending wakeups to the PRCM, and disable I/O ring wakeup
3723 * events for this IP block if it has dynamic mux entries. Eventually
3724 * this should clear PRCM wakeup registers to cause the PRCM to ignore
3725 * wakeup events from the module. Does not set any wakeup routing
3726 * registers beyond this point - if the module is to wake up any other
3727 * module or subsystem, that must be set separately. Called by
3728 * omap_device code. Returns -EINVAL on error or 0 upon success.
3730 int omap_hwmod_disable_wakeup(struct omap_hwmod *oh)
3732 unsigned long flags;
3735 spin_lock_irqsave(&oh->_lock, flags);
3737 if (oh->class->sysc &&
3738 (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) {
3739 v = oh->_sysc_cache;
3740 _disable_wakeup(oh, &v);
3741 _write_sysconfig(v, oh);
3744 _set_idle_ioring_wakeup(oh, false);
3745 spin_unlock_irqrestore(&oh->_lock, flags);
3751 * omap_hwmod_assert_hardreset - assert the HW reset line of submodules
3752 * contained in the hwmod module.
3753 * @oh: struct omap_hwmod *
3754 * @name: name of the reset line to lookup and assert
3756 * Some IP like dsp, ipu or iva contain processor that require
3757 * an HW reset line to be assert / deassert in order to enable fully
3758 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3759 * yet supported on this OMAP; otherwise, passes along the return value
3760 * from _assert_hardreset().
3762 int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name)
3765 unsigned long flags;
3770 spin_lock_irqsave(&oh->_lock, flags);
3771 ret = _assert_hardreset(oh, name);
3772 spin_unlock_irqrestore(&oh->_lock, flags);
3778 * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules
3779 * contained in the hwmod module.
3780 * @oh: struct omap_hwmod *
3781 * @name: name of the reset line to look up and deassert
3783 * Some IP like dsp, ipu or iva contain processor that require
3784 * an HW reset line to be assert / deassert in order to enable fully
3785 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3786 * yet supported on this OMAP; otherwise, passes along the return value
3787 * from _deassert_hardreset().
3789 int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name)
3792 unsigned long flags;
3797 spin_lock_irqsave(&oh->_lock, flags);
3798 ret = _deassert_hardreset(oh, name);
3799 spin_unlock_irqrestore(&oh->_lock, flags);
3805 * omap_hwmod_read_hardreset - read the HW reset line state of submodules
3806 * contained in the hwmod module
3807 * @oh: struct omap_hwmod *
3808 * @name: name of the reset line to look up and read
3810 * Return the current state of the hwmod @oh's reset line named @name:
3811 * returns -EINVAL upon parameter error or if this operation
3812 * is unsupported on the current OMAP; otherwise, passes along the return
3813 * value from _read_hardreset().
3815 int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name)
3818 unsigned long flags;
3823 spin_lock_irqsave(&oh->_lock, flags);
3824 ret = _read_hardreset(oh, name);
3825 spin_unlock_irqrestore(&oh->_lock, flags);
3832 * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname
3833 * @classname: struct omap_hwmod_class name to search for
3834 * @fn: callback function pointer to call for each hwmod in class @classname
3835 * @user: arbitrary context data to pass to the callback function
3837 * For each omap_hwmod of class @classname, call @fn.
3838 * If the callback function returns something other than
3839 * zero, the iterator is terminated, and the callback function's return
3840 * value is passed back to the caller. Returns 0 upon success, -EINVAL
3841 * if @classname or @fn are NULL, or passes back the error code from @fn.
3843 int omap_hwmod_for_each_by_class(const char *classname,
3844 int (*fn)(struct omap_hwmod *oh,
3848 struct omap_hwmod *temp_oh;
3851 if (!classname || !fn)
3854 pr_debug("omap_hwmod: %s: looking for modules of class %s\n",
3855 __func__, classname);
3857 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
3858 if (!strcmp(temp_oh->class->name, classname)) {
3859 pr_debug("omap_hwmod: %s: %s: calling callback fn\n",
3860 __func__, temp_oh->name);
3861 ret = (*fn)(temp_oh, user);
3868 pr_debug("omap_hwmod: %s: iterator terminated early: %d\n",
3875 * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod
3876 * @oh: struct omap_hwmod *
3877 * @state: state that _setup() should leave the hwmod in
3879 * Sets the hwmod state that @oh will enter at the end of _setup()
3880 * (called by omap_hwmod_setup_*()). See also the documentation
3881 * for _setup_postsetup(), above. Returns 0 upon success or
3882 * -EINVAL if there is a problem with the arguments or if the hwmod is
3883 * in the wrong state.
3885 int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state)
3888 unsigned long flags;
3893 if (state != _HWMOD_STATE_DISABLED &&
3894 state != _HWMOD_STATE_ENABLED &&
3895 state != _HWMOD_STATE_IDLE)
3898 spin_lock_irqsave(&oh->_lock, flags);
3900 if (oh->_state != _HWMOD_STATE_REGISTERED) {
3905 oh->_postsetup_state = state;
3909 spin_unlock_irqrestore(&oh->_lock, flags);
3915 * omap_hwmod_get_context_loss_count - get lost context count
3916 * @oh: struct omap_hwmod *
3918 * Query the powerdomain of of @oh to get the context loss
3919 * count for this device.
3921 * Returns the context loss count of the powerdomain assocated with @oh
3922 * upon success, or zero if no powerdomain exists for @oh.
3924 int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh)
3926 struct powerdomain *pwrdm;
3929 pwrdm = omap_hwmod_get_pwrdm(oh);
3931 ret = pwrdm_get_context_loss_count(pwrdm);
3937 * omap_hwmod_no_setup_reset - prevent a hwmod from being reset upon setup
3938 * @oh: struct omap_hwmod *
3940 * Prevent the hwmod @oh from being reset during the setup process.
3941 * Intended for use by board-*.c files on boards with devices that
3942 * cannot tolerate being reset. Must be called before the hwmod has
3943 * been set up. Returns 0 upon success or negative error code upon
3946 int omap_hwmod_no_setup_reset(struct omap_hwmod *oh)
3951 if (oh->_state != _HWMOD_STATE_REGISTERED) {
3952 pr_err("omap_hwmod: %s: cannot prevent setup reset; in wrong state\n",
3957 oh->flags |= HWMOD_INIT_NO_RESET;
3963 * omap_hwmod_pad_route_irq - route an I/O pad wakeup to a particular MPU IRQ
3964 * @oh: struct omap_hwmod * containing hwmod mux entries
3965 * @pad_idx: array index in oh->mux of the hwmod mux entry to route wakeup
3966 * @irq_idx: the hwmod mpu_irqs array index of the IRQ to trigger on wakeup
3968 * When an I/O pad wakeup arrives for the dynamic or wakeup hwmod mux
3969 * entry number @pad_idx for the hwmod @oh, trigger the interrupt
3970 * service routine for the hwmod's mpu_irqs array index @irq_idx. If
3971 * this function is not called for a given pad_idx, then the ISR
3972 * associated with @oh's first MPU IRQ will be triggered when an I/O
3973 * pad wakeup occurs on that pad. Note that @pad_idx is the index of
3974 * the _dynamic or wakeup_ entry: if there are other entries not
3975 * marked with OMAP_DEVICE_PAD_WAKEUP or OMAP_DEVICE_PAD_REMUX, these
3976 * entries are NOT COUNTED in the dynamic pad index. This function
3977 * must be called separately for each pad that requires its interrupt
3978 * to be re-routed this way. Returns -EINVAL if there is an argument
3979 * problem or if @oh does not have hwmod mux entries or MPU IRQs;
3980 * returns -ENOMEM if memory cannot be allocated; or 0 upon success.
3982 * XXX This function interface is fragile. Rather than using array
3983 * indexes, which are subject to unpredictable change, it should be
3984 * using hwmod IRQ names, and some other stable key for the hwmod mux
3987 int omap_hwmod_pad_route_irq(struct omap_hwmod *oh, int pad_idx, int irq_idx)
3993 if (!oh || !oh->mux || !oh->mpu_irqs || pad_idx < 0 ||
3994 pad_idx >= oh->mux->nr_pads_dynamic)
3997 /* Check the number of available mpu_irqs */
3998 for (nr_irqs = 0; oh->mpu_irqs[nr_irqs].irq >= 0; nr_irqs++)
4001 if (irq_idx >= nr_irqs)
4004 if (!oh->mux->irqs) {
4005 /* XXX What frees this? */
4006 oh->mux->irqs = kzalloc(sizeof(int) * oh->mux->nr_pads_dynamic,
4011 oh->mux->irqs[pad_idx] = irq_idx;
4017 * omap_hwmod_init - initialize the hwmod code
4019 * Sets up some function pointers needed by the hwmod code to operate on the
4020 * currently-booted SoC. Intended to be called once during kernel init
4021 * before any hwmods are registered. No return value.
4023 void __init omap_hwmod_init(void)
4025 if (cpu_is_omap24xx()) {
4026 soc_ops.wait_target_ready = _omap2xxx_wait_target_ready;
4027 soc_ops.assert_hardreset = _omap2_assert_hardreset;
4028 soc_ops.deassert_hardreset = _omap2_deassert_hardreset;
4029 soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted;
4030 } else if (cpu_is_omap34xx()) {
4031 soc_ops.wait_target_ready = _omap3xxx_wait_target_ready;
4032 soc_ops.assert_hardreset = _omap2_assert_hardreset;
4033 soc_ops.deassert_hardreset = _omap2_deassert_hardreset;
4034 soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted;
4035 } else if (cpu_is_omap44xx() || soc_is_omap54xx()) {
4036 soc_ops.enable_module = _omap4_enable_module;
4037 soc_ops.disable_module = _omap4_disable_module;
4038 soc_ops.wait_target_ready = _omap4_wait_target_ready;
4039 soc_ops.assert_hardreset = _omap4_assert_hardreset;
4040 soc_ops.deassert_hardreset = _omap4_deassert_hardreset;
4041 soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted;
4042 soc_ops.init_clkdm = _init_clkdm;
4043 } else if (soc_is_am33xx()) {
4044 soc_ops.enable_module = _am33xx_enable_module;
4045 soc_ops.disable_module = _am33xx_disable_module;
4046 soc_ops.wait_target_ready = _am33xx_wait_target_ready;
4047 soc_ops.assert_hardreset = _am33xx_assert_hardreset;
4048 soc_ops.deassert_hardreset = _am33xx_deassert_hardreset;
4049 soc_ops.is_hardreset_asserted = _am33xx_is_hardreset_asserted;
4050 soc_ops.init_clkdm = _init_clkdm;
4052 WARN(1, "omap_hwmod: unknown SoC type\n");
4059 * omap_hwmod_get_main_clk - get pointer to main clock name
4060 * @oh: struct omap_hwmod *
4062 * Returns the main clock name assocated with @oh upon success,
4063 * or NULL if @oh is NULL.
4065 const char *omap_hwmod_get_main_clk(struct omap_hwmod *oh)
4070 return oh->main_clk;