2 * omap_hwmod implementation for OMAP2/3/4
4 * Copyright (C) 2009-2011 Nokia Corporation
5 * Copyright (C) 2011-2012 Texas Instruments, Inc.
7 * Paul Walmsley, BenoƮt Cousson, Kevin Hilman
9 * Created in collaboration with (alphabetical order): Thara Gopinath,
10 * Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari Poussa, Anand
11 * Sawant, Santosh Shilimkar, Richard Woodruff
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
19 * One way to view an OMAP SoC is as a collection of largely unrelated
20 * IP blocks connected by interconnects. The IP blocks include
21 * devices such as ARM processors, audio serial interfaces, UARTs,
22 * etc. Some of these devices, like the DSP, are created by TI;
23 * others, like the SGX, largely originate from external vendors. In
24 * TI's documentation, on-chip devices are referred to as "OMAP
25 * modules." Some of these IP blocks are identical across several
26 * OMAP versions. Others are revised frequently.
28 * These OMAP modules are tied together by various interconnects.
29 * Most of the address and data flow between modules is via OCP-based
30 * interconnects such as the L3 and L4 buses; but there are other
31 * interconnects that distribute the hardware clock tree, handle idle
32 * and reset signaling, supply power, and connect the modules to
33 * various pads or balls on the OMAP package.
35 * OMAP hwmod provides a consistent way to describe the on-chip
36 * hardware blocks and their integration into the rest of the chip.
37 * This description can be automatically generated from the TI
38 * hardware database. OMAP hwmod provides a standard, consistent API
39 * to reset, enable, idle, and disable these hardware blocks. And
40 * hwmod provides a way for other core code, such as the Linux device
41 * code or the OMAP power management and address space mapping code,
42 * to query the hardware database.
46 * Drivers won't call hwmod functions directly. That is done by the
47 * omap_device code, and in rare occasions, by custom integration code
48 * in arch/arm/ *omap*. The omap_device code includes functions to
49 * build a struct platform_device using omap_hwmod data, and that is
50 * currently how hwmod data is communicated to drivers and to the
51 * Linux driver model. Most drivers will call omap_hwmod functions only
52 * indirectly, via pm_runtime*() functions.
54 * From a layering perspective, here is where the OMAP hwmod code
55 * fits into the kernel software stack:
57 * +-------------------------------+
58 * | Device driver code |
59 * | (e.g., drivers/) |
60 * +-------------------------------+
61 * | Linux driver model |
62 * | (platform_device / |
63 * | platform_driver data/code) |
64 * +-------------------------------+
65 * | OMAP core-driver integration |
66 * |(arch/arm/mach-omap2/devices.c)|
67 * +-------------------------------+
68 * | omap_device code |
69 * | (../plat-omap/omap_device.c) |
70 * +-------------------------------+
71 * ----> | omap_hwmod code/data | <-----
72 * | (../mach-omap2/omap_hwmod*) |
73 * +-------------------------------+
74 * | OMAP clock/PRCM/register fns |
75 * | ({read,write}l_relaxed, clk*) |
76 * +-------------------------------+
78 * Device drivers should not contain any OMAP-specific code or data in
79 * them. They should only contain code to operate the IP block that
80 * the driver is responsible for. This is because these IP blocks can
81 * also appear in other SoCs, either from TI (such as DaVinci) or from
82 * other manufacturers; and drivers should be reusable across other
85 * The OMAP hwmod code also will attempt to reset and idle all on-chip
86 * devices upon boot. The goal here is for the kernel to be
87 * completely self-reliant and independent from bootloaders. This is
88 * to ensure a repeatable configuration, both to ensure consistent
89 * runtime behavior, and to make it easier for others to reproduce
92 * OMAP module activity states
93 * ---------------------------
94 * The hwmod code considers modules to be in one of several activity
95 * states. IP blocks start out in an UNKNOWN state, then once they
96 * are registered via the hwmod code, proceed to the REGISTERED state.
97 * Once their clock names are resolved to clock pointers, the module
98 * enters the CLKS_INITED state; and finally, once the module has been
99 * reset and the integration registers programmed, the INITIALIZED state
100 * is entered. The hwmod code will then place the module into either
101 * the IDLE state to save power, or in the case of a critical system
102 * module, the ENABLED state.
104 * OMAP core integration code can then call omap_hwmod*() functions
105 * directly to move the module between the IDLE, ENABLED, and DISABLED
106 * states, as needed. This is done during both the PM idle loop, and
107 * in the OMAP core integration code's implementation of the PM runtime
112 * This is a partial list.
113 * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
114 * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
115 * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
116 * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
117 * - Open Core Protocol Specification 2.2
120 * - handle IO mapping
121 * - bus throughput & module latency measurement code
123 * XXX add tests at the beginning of each function to ensure the hwmod is
124 * in the appropriate state
125 * XXX error return values should be checked to ensure that they are
130 #include <linux/kernel.h>
131 #include <linux/errno.h>
132 #include <linux/io.h>
133 #include <linux/clk-provider.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>
141 #include <linux/cpu.h>
142 #include <linux/of.h>
143 #include <linux/of_address.h>
145 #include <asm/system_misc.h>
148 #include "omap_hwmod.h"
152 #include "clockdomain.h"
153 #include "powerdomain.h"
161 #include "prminst44xx.h"
165 /* Name of the OMAP hwmod for the MPU */
166 #define MPU_INITIATOR_NAME "mpu"
169 * Number of struct omap_hwmod_link records per struct
170 * omap_hwmod_ocp_if record (master->slave and slave->master)
172 #define LINKS_PER_OCP_IF 2
175 * Address offset (in bytes) between the reset control and the reset
176 * status registers: 4 bytes on OMAP4
178 #define OMAP4_RST_CTRL_ST_OFFSET 4
181 * struct omap_hwmod_soc_ops - fn ptrs for some SoC-specific operations
182 * @enable_module: function to enable a module (via MODULEMODE)
183 * @disable_module: function to disable a module (via MODULEMODE)
185 * XXX Eventually this functionality will be hidden inside the PRM/CM
186 * device drivers. Until then, this should avoid huge blocks of cpu_is_*()
187 * conditionals in this code.
189 struct omap_hwmod_soc_ops
{
190 void (*enable_module
)(struct omap_hwmod
*oh
);
191 int (*disable_module
)(struct omap_hwmod
*oh
);
192 int (*wait_target_ready
)(struct omap_hwmod
*oh
);
193 int (*assert_hardreset
)(struct omap_hwmod
*oh
,
194 struct omap_hwmod_rst_info
*ohri
);
195 int (*deassert_hardreset
)(struct omap_hwmod
*oh
,
196 struct omap_hwmod_rst_info
*ohri
);
197 int (*is_hardreset_asserted
)(struct omap_hwmod
*oh
,
198 struct omap_hwmod_rst_info
*ohri
);
199 int (*init_clkdm
)(struct omap_hwmod
*oh
);
200 void (*update_context_lost
)(struct omap_hwmod
*oh
);
201 int (*get_context_lost
)(struct omap_hwmod
*oh
);
204 /* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */
205 static struct omap_hwmod_soc_ops soc_ops
;
207 /* omap_hwmod_list contains all registered struct omap_hwmods */
208 static LIST_HEAD(omap_hwmod_list
);
210 /* mpu_oh: used to add/remove MPU initiator from sleepdep list */
211 static struct omap_hwmod
*mpu_oh
;
213 /* io_chain_lock: used to serialize reconfigurations of the I/O chain */
214 static DEFINE_SPINLOCK(io_chain_lock
);
217 * linkspace: ptr to a buffer that struct omap_hwmod_link records are
218 * allocated from - used to reduce the number of small memory
219 * allocations, which has a significant impact on performance
221 static struct omap_hwmod_link
*linkspace
;
224 * free_ls, max_ls: array indexes into linkspace; representing the
225 * next free struct omap_hwmod_link index, and the maximum number of
226 * struct omap_hwmod_link records allocated (respectively)
228 static unsigned short free_ls
, max_ls
, ls_supp
;
230 /* inited: set to true once the hwmod code is initialized */
233 /* Private functions */
236 * _fetch_next_ocp_if - return the next OCP interface in a list
237 * @p: ptr to a ptr to the list_head inside the ocp_if to return
238 * @i: pointer to the index of the element pointed to by @p in the list
240 * Return a pointer to the struct omap_hwmod_ocp_if record
241 * containing the struct list_head pointed to by @p, and increment
242 * @p such that a future call to this routine will return the next
245 static struct omap_hwmod_ocp_if
*_fetch_next_ocp_if(struct list_head
**p
,
248 struct omap_hwmod_ocp_if
*oi
;
250 oi
= list_entry(*p
, struct omap_hwmod_link
, node
)->ocp_if
;
259 * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
260 * @oh: struct omap_hwmod *
262 * Load the current value of the hwmod OCP_SYSCONFIG register into the
263 * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
264 * OCP_SYSCONFIG register or 0 upon success.
266 static int _update_sysc_cache(struct omap_hwmod
*oh
)
268 if (!oh
->class->sysc
) {
269 WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh
->name
);
273 /* XXX ensure module interface clock is up */
275 oh
->_sysc_cache
= omap_hwmod_read(oh
, oh
->class->sysc
->sysc_offs
);
277 if (!(oh
->class->sysc
->sysc_flags
& SYSC_NO_CACHE
))
278 oh
->_int_flags
|= _HWMOD_SYSCONFIG_LOADED
;
284 * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
285 * @v: OCP_SYSCONFIG value to write
286 * @oh: struct omap_hwmod *
288 * Write @v into the module class' OCP_SYSCONFIG register, if it has
289 * one. No return value.
291 static void _write_sysconfig(u32 v
, struct omap_hwmod
*oh
)
293 if (!oh
->class->sysc
) {
294 WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh
->name
);
298 /* XXX ensure module interface clock is up */
300 /* Module might have lost context, always update cache and register */
304 * Some IP blocks (such as RTC) require unlocking of IP before
305 * accessing its registers. If a function pointer is present
306 * to unlock, then call it before accessing sysconfig and
307 * call lock after writing sysconfig.
309 if (oh
->class->unlock
)
310 oh
->class->unlock(oh
);
312 omap_hwmod_write(v
, oh
, oh
->class->sysc
->sysc_offs
);
319 * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
320 * @oh: struct omap_hwmod *
321 * @standbymode: MIDLEMODE field bits
322 * @v: pointer to register contents to modify
324 * Update the master standby mode bits in @v to be @standbymode for
325 * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
326 * upon error or 0 upon success.
328 static int _set_master_standbymode(struct omap_hwmod
*oh
, u8 standbymode
,
334 if (!oh
->class->sysc
||
335 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_MIDLEMODE
))
338 if (!oh
->class->sysc
->sysc_fields
) {
339 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
343 mstandby_shift
= oh
->class->sysc
->sysc_fields
->midle_shift
;
344 mstandby_mask
= (0x3 << mstandby_shift
);
346 *v
&= ~mstandby_mask
;
347 *v
|= __ffs(standbymode
) << mstandby_shift
;
353 * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
354 * @oh: struct omap_hwmod *
355 * @idlemode: SIDLEMODE field bits
356 * @v: pointer to register contents to modify
358 * Update the slave idle mode bits in @v to be @idlemode for the @oh
359 * hwmod. Does not write to the hardware. Returns -EINVAL upon error
362 static int _set_slave_idlemode(struct omap_hwmod
*oh
, u8 idlemode
, u32
*v
)
367 if (!oh
->class->sysc
||
368 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SIDLEMODE
))
371 if (!oh
->class->sysc
->sysc_fields
) {
372 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
376 sidle_shift
= oh
->class->sysc
->sysc_fields
->sidle_shift
;
377 sidle_mask
= (0x3 << sidle_shift
);
380 *v
|= __ffs(idlemode
) << sidle_shift
;
386 * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
387 * @oh: struct omap_hwmod *
388 * @clockact: CLOCKACTIVITY field bits
389 * @v: pointer to register contents to modify
391 * Update the clockactivity mode bits in @v to be @clockact for the
392 * @oh hwmod. Used for additional powersaving on some modules. Does
393 * not write to the hardware. Returns -EINVAL upon error or 0 upon
396 static int _set_clockactivity(struct omap_hwmod
*oh
, u8 clockact
, u32
*v
)
401 if (!oh
->class->sysc
||
402 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_CLOCKACTIVITY
))
405 if (!oh
->class->sysc
->sysc_fields
) {
406 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
410 clkact_shift
= oh
->class->sysc
->sysc_fields
->clkact_shift
;
411 clkact_mask
= (0x3 << clkact_shift
);
414 *v
|= clockact
<< clkact_shift
;
420 * _set_softreset: set OCP_SYSCONFIG.SOFTRESET bit in @v
421 * @oh: struct omap_hwmod *
422 * @v: pointer to register contents to modify
424 * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
425 * error or 0 upon success.
427 static int _set_softreset(struct omap_hwmod
*oh
, u32
*v
)
431 if (!oh
->class->sysc
||
432 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SOFTRESET
))
435 if (!oh
->class->sysc
->sysc_fields
) {
436 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
440 softrst_mask
= (0x1 << oh
->class->sysc
->sysc_fields
->srst_shift
);
448 * _clear_softreset: clear OCP_SYSCONFIG.SOFTRESET bit in @v
449 * @oh: struct omap_hwmod *
450 * @v: pointer to register contents to modify
452 * Clear the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
453 * error or 0 upon success.
455 static int _clear_softreset(struct omap_hwmod
*oh
, u32
*v
)
459 if (!oh
->class->sysc
||
460 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SOFTRESET
))
463 if (!oh
->class->sysc
->sysc_fields
) {
465 "omap_hwmod: %s: sysc_fields absent for sysconfig class\n",
470 softrst_mask
= (0x1 << oh
->class->sysc
->sysc_fields
->srst_shift
);
478 * _wait_softreset_complete - wait for an OCP softreset to complete
479 * @oh: struct omap_hwmod * to wait on
481 * Wait until the IP block represented by @oh reports that its OCP
482 * softreset is complete. This can be triggered by software (see
483 * _ocp_softreset()) or by hardware upon returning from off-mode (one
484 * example is HSMMC). Waits for up to MAX_MODULE_SOFTRESET_WAIT
485 * microseconds. Returns the number of microseconds waited.
487 static int _wait_softreset_complete(struct omap_hwmod
*oh
)
489 struct omap_hwmod_class_sysconfig
*sysc
;
493 sysc
= oh
->class->sysc
;
495 if (sysc
->sysc_flags
& SYSS_HAS_RESET_STATUS
)
496 omap_test_timeout((omap_hwmod_read(oh
, sysc
->syss_offs
)
497 & SYSS_RESETDONE_MASK
),
498 MAX_MODULE_SOFTRESET_WAIT
, c
);
499 else if (sysc
->sysc_flags
& SYSC_HAS_RESET_STATUS
) {
500 softrst_mask
= (0x1 << sysc
->sysc_fields
->srst_shift
);
501 omap_test_timeout(!(omap_hwmod_read(oh
, sysc
->sysc_offs
)
503 MAX_MODULE_SOFTRESET_WAIT
, c
);
510 * _set_dmadisable: set OCP_SYSCONFIG.DMADISABLE bit in @v
511 * @oh: struct omap_hwmod *
513 * The DMADISABLE bit is a semi-automatic bit present in sysconfig register
514 * of some modules. When the DMA must perform read/write accesses, the
515 * DMADISABLE bit is cleared by the hardware. But when the DMA must stop
516 * for power management, software must set the DMADISABLE bit back to 1.
518 * Set the DMADISABLE bit in @v for hwmod @oh. Returns -EINVAL upon
519 * error or 0 upon success.
521 static int _set_dmadisable(struct omap_hwmod
*oh
)
526 if (!oh
->class->sysc
||
527 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_DMADISABLE
))
530 if (!oh
->class->sysc
->sysc_fields
) {
531 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
535 /* clocks must be on for this operation */
536 if (oh
->_state
!= _HWMOD_STATE_ENABLED
) {
537 pr_warn("omap_hwmod: %s: dma can be disabled only from enabled state\n", oh
->name
);
541 pr_debug("omap_hwmod: %s: setting DMADISABLE\n", oh
->name
);
545 (0x1 << oh
->class->sysc
->sysc_fields
->dmadisable_shift
);
546 v
|= dmadisable_mask
;
547 _write_sysconfig(v
, oh
);
553 * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v
554 * @oh: struct omap_hwmod *
555 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
556 * @v: pointer to register contents to modify
558 * Update the module autoidle bit in @v to be @autoidle for the @oh
559 * hwmod. The autoidle bit controls whether the module can gate
560 * internal clocks automatically when it isn't doing anything; the
561 * exact function of this bit varies on a per-module basis. This
562 * function does not write to the hardware. Returns -EINVAL upon
563 * error or 0 upon success.
565 static int _set_module_autoidle(struct omap_hwmod
*oh
, u8 autoidle
,
571 if (!oh
->class->sysc
||
572 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_AUTOIDLE
))
575 if (!oh
->class->sysc
->sysc_fields
) {
576 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
580 autoidle_shift
= oh
->class->sysc
->sysc_fields
->autoidle_shift
;
581 autoidle_mask
= (0x1 << autoidle_shift
);
583 *v
&= ~autoidle_mask
;
584 *v
|= autoidle
<< autoidle_shift
;
590 * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux
591 * @oh: struct omap_hwmod *
592 * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable
594 * Set or clear the I/O pad wakeup flag in the mux entries for the
595 * hwmod @oh. This function changes the @oh->mux->pads_dynamic array
596 * in memory. If the hwmod is currently idled, and the new idle
597 * values don't match the previous ones, this function will also
598 * update the SCM PADCTRL registers. Otherwise, if the hwmod is not
599 * currently idled, this function won't touch the hardware: the new
600 * mux settings are written to the SCM PADCTRL registers when the
601 * hwmod is idled. No return value.
603 static void _set_idle_ioring_wakeup(struct omap_hwmod
*oh
, bool set_wake
)
605 struct omap_device_pad
*pad
;
610 if (!oh
->mux
|| !oh
->mux
->enabled
)
613 for (j
= 0; j
< oh
->mux
->nr_pads_dynamic
; j
++) {
614 pad
= oh
->mux
->pads_dynamic
[j
];
616 if (!(pad
->flags
& OMAP_DEVICE_PAD_WAKEUP
))
619 prev_idle
= pad
->idle
;
622 pad
->idle
|= OMAP_WAKEUP_EN
;
624 pad
->idle
&= ~OMAP_WAKEUP_EN
;
626 if (prev_idle
!= pad
->idle
)
630 if (change
&& oh
->_state
== _HWMOD_STATE_IDLE
)
631 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_IDLE
);
635 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
636 * @oh: struct omap_hwmod *
638 * Allow the hardware module @oh to send wakeups. Returns -EINVAL
639 * upon error or 0 upon success.
641 static int _enable_wakeup(struct omap_hwmod
*oh
, u32
*v
)
643 if (!oh
->class->sysc
||
644 !((oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
) ||
645 (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
) ||
646 (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)))
649 if (!oh
->class->sysc
->sysc_fields
) {
650 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
654 if (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)
655 *v
|= 0x1 << oh
->class->sysc
->sysc_fields
->enwkup_shift
;
657 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
658 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_SMART_WKUP
, v
);
659 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
660 _set_master_standbymode(oh
, HWMOD_IDLEMODE_SMART_WKUP
, v
);
662 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
668 * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
669 * @oh: struct omap_hwmod *
671 * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
672 * upon error or 0 upon success.
674 static int _disable_wakeup(struct omap_hwmod
*oh
, u32
*v
)
676 if (!oh
->class->sysc
||
677 !((oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
) ||
678 (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
) ||
679 (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)))
682 if (!oh
->class->sysc
->sysc_fields
) {
683 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
687 if (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)
688 *v
&= ~(0x1 << oh
->class->sysc
->sysc_fields
->enwkup_shift
);
690 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
691 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_SMART
, v
);
692 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
693 _set_master_standbymode(oh
, HWMOD_IDLEMODE_SMART
, v
);
695 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
700 static struct clockdomain
*_get_clkdm(struct omap_hwmod
*oh
)
702 struct clk_hw_omap
*clk
;
706 } else if (oh
->_clk
) {
707 if (__clk_get_flags(oh
->_clk
) & CLK_IS_BASIC
)
709 clk
= to_clk_hw_omap(__clk_get_hw(oh
->_clk
));
716 * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
717 * @oh: struct omap_hwmod *
719 * Prevent the hardware module @oh from entering idle while the
720 * hardare module initiator @init_oh is active. Useful when a module
721 * will be accessed by a particular initiator (e.g., if a module will
722 * be accessed by the IVA, there should be a sleepdep between the IVA
723 * initiator and the module). Only applies to modules in smart-idle
724 * mode. If the clockdomain is marked as not needing autodeps, return
725 * 0 without doing anything. Otherwise, returns -EINVAL upon error or
726 * passes along clkdm_add_sleepdep() value upon success.
728 static int _add_initiator_dep(struct omap_hwmod
*oh
, struct omap_hwmod
*init_oh
)
730 struct clockdomain
*clkdm
, *init_clkdm
;
732 clkdm
= _get_clkdm(oh
);
733 init_clkdm
= _get_clkdm(init_oh
);
735 if (!clkdm
|| !init_clkdm
)
738 if (clkdm
&& clkdm
->flags
& CLKDM_NO_AUTODEPS
)
741 return clkdm_add_sleepdep(clkdm
, init_clkdm
);
745 * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
746 * @oh: struct omap_hwmod *
748 * Allow the hardware module @oh to enter idle while the hardare
749 * module initiator @init_oh is active. Useful when a module will not
750 * be accessed by a particular initiator (e.g., if a module will not
751 * be accessed by the IVA, there should be no sleepdep between the IVA
752 * initiator and the module). Only applies to modules in smart-idle
753 * mode. If the clockdomain is marked as not needing autodeps, return
754 * 0 without doing anything. Returns -EINVAL upon error or passes
755 * along clkdm_del_sleepdep() value upon success.
757 static int _del_initiator_dep(struct omap_hwmod
*oh
, struct omap_hwmod
*init_oh
)
759 struct clockdomain
*clkdm
, *init_clkdm
;
761 clkdm
= _get_clkdm(oh
);
762 init_clkdm
= _get_clkdm(init_oh
);
764 if (!clkdm
|| !init_clkdm
)
767 if (clkdm
&& clkdm
->flags
& CLKDM_NO_AUTODEPS
)
770 return clkdm_del_sleepdep(clkdm
, init_clkdm
);
774 * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
775 * @oh: struct omap_hwmod *
777 * Called from _init_clocks(). Populates the @oh _clk (main
778 * functional clock pointer) if a main_clk is present. Returns 0 on
779 * success or -EINVAL on error.
781 static int _init_main_clk(struct omap_hwmod
*oh
)
788 oh
->_clk
= clk_get(NULL
, oh
->main_clk
);
789 if (IS_ERR(oh
->_clk
)) {
790 pr_warn("omap_hwmod: %s: cannot clk_get main_clk %s\n",
791 oh
->name
, oh
->main_clk
);
795 * HACK: This needs a re-visit once clk_prepare() is implemented
796 * to do something meaningful. Today its just a no-op.
797 * If clk_prepare() is used at some point to do things like
798 * voltage scaling etc, then this would have to be moved to
799 * some point where subsystems like i2c and pmic become
802 clk_prepare(oh
->_clk
);
805 pr_debug("omap_hwmod: %s: missing clockdomain for %s.\n",
806 oh
->name
, oh
->main_clk
);
812 * _init_interface_clks - get a struct clk * for the the hwmod's interface clks
813 * @oh: struct omap_hwmod *
815 * Called from _init_clocks(). Populates the @oh OCP slave interface
816 * clock pointers. Returns 0 on success or -EINVAL on error.
818 static int _init_interface_clks(struct omap_hwmod
*oh
)
820 struct omap_hwmod_ocp_if
*os
;
826 p
= oh
->slave_ports
.next
;
828 while (i
< oh
->slaves_cnt
) {
829 os
= _fetch_next_ocp_if(&p
, &i
);
833 c
= clk_get(NULL
, os
->clk
);
835 pr_warn("omap_hwmod: %s: cannot clk_get interface_clk %s\n",
842 * HACK: This needs a re-visit once clk_prepare() is implemented
843 * to do something meaningful. Today its just a no-op.
844 * If clk_prepare() is used at some point to do things like
845 * voltage scaling etc, then this would have to be moved to
846 * some point where subsystems like i2c and pmic become
849 clk_prepare(os
->_clk
);
856 * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
857 * @oh: struct omap_hwmod *
859 * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
860 * clock pointers. Returns 0 on success or -EINVAL on error.
862 static int _init_opt_clks(struct omap_hwmod
*oh
)
864 struct omap_hwmod_opt_clk
*oc
;
869 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++) {
870 c
= clk_get(NULL
, oc
->clk
);
872 pr_warn("omap_hwmod: %s: cannot clk_get opt_clk %s\n",
879 * HACK: This needs a re-visit once clk_prepare() is implemented
880 * to do something meaningful. Today its just a no-op.
881 * If clk_prepare() is used at some point to do things like
882 * voltage scaling etc, then this would have to be moved to
883 * some point where subsystems like i2c and pmic become
886 clk_prepare(oc
->_clk
);
893 * _enable_clocks - enable hwmod main clock and interface clocks
894 * @oh: struct omap_hwmod *
896 * Enables all clocks necessary for register reads and writes to succeed
897 * on the hwmod @oh. Returns 0.
899 static int _enable_clocks(struct omap_hwmod
*oh
)
901 struct omap_hwmod_ocp_if
*os
;
905 pr_debug("omap_hwmod: %s: enabling clocks\n", oh
->name
);
908 clk_enable(oh
->_clk
);
910 p
= oh
->slave_ports
.next
;
912 while (i
< oh
->slaves_cnt
) {
913 os
= _fetch_next_ocp_if(&p
, &i
);
915 if (os
->_clk
&& (os
->flags
& OCPIF_SWSUP_IDLE
))
916 clk_enable(os
->_clk
);
919 /* The opt clocks are controlled by the device driver. */
925 * _disable_clocks - disable hwmod main clock and interface clocks
926 * @oh: struct omap_hwmod *
928 * Disables the hwmod @oh main functional and interface clocks. Returns 0.
930 static int _disable_clocks(struct omap_hwmod
*oh
)
932 struct omap_hwmod_ocp_if
*os
;
936 pr_debug("omap_hwmod: %s: disabling clocks\n", oh
->name
);
939 clk_disable(oh
->_clk
);
941 p
= oh
->slave_ports
.next
;
943 while (i
< oh
->slaves_cnt
) {
944 os
= _fetch_next_ocp_if(&p
, &i
);
946 if (os
->_clk
&& (os
->flags
& OCPIF_SWSUP_IDLE
))
947 clk_disable(os
->_clk
);
950 /* The opt clocks are controlled by the device driver. */
955 static void _enable_optional_clocks(struct omap_hwmod
*oh
)
957 struct omap_hwmod_opt_clk
*oc
;
960 pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh
->name
);
962 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++)
964 pr_debug("omap_hwmod: enable %s:%s\n", oc
->role
,
965 __clk_get_name(oc
->_clk
));
966 clk_enable(oc
->_clk
);
970 static void _disable_optional_clocks(struct omap_hwmod
*oh
)
972 struct omap_hwmod_opt_clk
*oc
;
975 pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh
->name
);
977 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++)
979 pr_debug("omap_hwmod: disable %s:%s\n", oc
->role
,
980 __clk_get_name(oc
->_clk
));
981 clk_disable(oc
->_clk
);
986 * _omap4_enable_module - enable CLKCTRL modulemode on OMAP4
987 * @oh: struct omap_hwmod *
989 * Enables the PRCM module mode related to the hwmod @oh.
992 static void _omap4_enable_module(struct omap_hwmod
*oh
)
994 if (!oh
->clkdm
|| !oh
->prcm
.omap4
.modulemode
)
997 pr_debug("omap_hwmod: %s: %s: %d\n",
998 oh
->name
, __func__
, oh
->prcm
.omap4
.modulemode
);
1000 omap_cm_module_enable(oh
->prcm
.omap4
.modulemode
,
1001 oh
->clkdm
->prcm_partition
,
1002 oh
->clkdm
->cm_inst
, oh
->prcm
.omap4
.clkctrl_offs
);
1006 * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4
1007 * @oh: struct omap_hwmod *
1009 * Wait for a module @oh to enter slave idle. Returns 0 if the module
1010 * does not have an IDLEST bit or if the module successfully enters
1011 * slave idle; otherwise, pass along the return value of the
1012 * appropriate *_cm*_wait_module_idle() function.
1014 static int _omap4_wait_target_disable(struct omap_hwmod
*oh
)
1019 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
|| !oh
->clkdm
)
1022 if (oh
->flags
& HWMOD_NO_IDLEST
)
1025 return omap_cm_wait_module_idle(oh
->clkdm
->prcm_partition
,
1027 oh
->prcm
.omap4
.clkctrl_offs
, 0);
1031 * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh
1032 * @oh: struct omap_hwmod *oh
1034 * Count and return the number of MPU IRQs associated with the hwmod
1035 * @oh. Used to allocate struct resource data. Returns 0 if @oh is
1038 static int _count_mpu_irqs(struct omap_hwmod
*oh
)
1040 struct omap_hwmod_irq_info
*ohii
;
1043 if (!oh
|| !oh
->mpu_irqs
)
1047 ohii
= &oh
->mpu_irqs
[i
++];
1048 } while (ohii
->irq
!= -1);
1054 * _count_sdma_reqs - count the number of SDMA request lines associated with @oh
1055 * @oh: struct omap_hwmod *oh
1057 * Count and return the number of SDMA request lines associated with
1058 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1061 static int _count_sdma_reqs(struct omap_hwmod
*oh
)
1063 struct omap_hwmod_dma_info
*ohdi
;
1066 if (!oh
|| !oh
->sdma_reqs
)
1070 ohdi
= &oh
->sdma_reqs
[i
++];
1071 } while (ohdi
->dma_req
!= -1);
1077 * _count_ocp_if_addr_spaces - count the number of address space entries for @oh
1078 * @oh: struct omap_hwmod *oh
1080 * Count and return the number of address space ranges associated with
1081 * the hwmod @oh. Used to allocate struct resource data. Returns 0
1084 static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if
*os
)
1086 struct omap_hwmod_addr_space
*mem
;
1089 if (!os
|| !os
->addr
)
1093 mem
= &os
->addr
[i
++];
1094 } while (mem
->pa_start
!= mem
->pa_end
);
1100 * _get_mpu_irq_by_name - fetch MPU interrupt line number by name
1101 * @oh: struct omap_hwmod * to operate on
1102 * @name: pointer to the name of the MPU interrupt number to fetch (optional)
1103 * @irq: pointer to an unsigned int to store the MPU IRQ number to
1105 * Retrieve a MPU hardware IRQ line number named by @name associated
1106 * with the IP block pointed to by @oh. The IRQ number will be filled
1107 * into the address pointed to by @dma. When @name is non-null, the
1108 * IRQ line number associated with the named entry will be returned.
1109 * If @name is null, the first matching entry will be returned. Data
1110 * order is not meaningful in hwmod data, so callers are strongly
1111 * encouraged to use a non-null @name whenever possible to avoid
1112 * unpredictable effects if hwmod data is later added that causes data
1113 * ordering to change. Returns 0 upon success or a negative error
1116 static int _get_mpu_irq_by_name(struct omap_hwmod
*oh
, const char *name
,
1126 while (oh
->mpu_irqs
[i
].irq
!= -1) {
1127 if (name
== oh
->mpu_irqs
[i
].name
||
1128 !strcmp(name
, oh
->mpu_irqs
[i
].name
)) {
1138 *irq
= oh
->mpu_irqs
[i
].irq
;
1144 * _get_sdma_req_by_name - fetch SDMA request line ID by name
1145 * @oh: struct omap_hwmod * to operate on
1146 * @name: pointer to the name of the SDMA request line to fetch (optional)
1147 * @dma: pointer to an unsigned int to store the request line ID to
1149 * Retrieve an SDMA request line ID named by @name on the IP block
1150 * pointed to by @oh. The ID will be filled into the address pointed
1151 * to by @dma. When @name is non-null, the request line ID associated
1152 * with the named entry will be returned. If @name is null, the first
1153 * matching entry will be returned. Data order is not meaningful in
1154 * hwmod data, so callers are strongly encouraged to use a non-null
1155 * @name whenever possible to avoid unpredictable effects if hwmod
1156 * data is later added that causes data ordering to change. Returns 0
1157 * upon success or a negative error code upon error.
1159 static int _get_sdma_req_by_name(struct omap_hwmod
*oh
, const char *name
,
1169 while (oh
->sdma_reqs
[i
].dma_req
!= -1) {
1170 if (name
== oh
->sdma_reqs
[i
].name
||
1171 !strcmp(name
, oh
->sdma_reqs
[i
].name
)) {
1181 *dma
= oh
->sdma_reqs
[i
].dma_req
;
1187 * _get_addr_space_by_name - fetch address space start & end by name
1188 * @oh: struct omap_hwmod * to operate on
1189 * @name: pointer to the name of the address space to fetch (optional)
1190 * @pa_start: pointer to a u32 to store the starting address to
1191 * @pa_end: pointer to a u32 to store the ending address to
1193 * Retrieve address space start and end addresses for the IP block
1194 * pointed to by @oh. The data will be filled into the addresses
1195 * pointed to by @pa_start and @pa_end. When @name is non-null, the
1196 * address space data associated with the named entry will be
1197 * returned. If @name is null, the first matching entry will be
1198 * returned. Data order is not meaningful in hwmod data, so callers
1199 * are strongly encouraged to use a non-null @name whenever possible
1200 * to avoid unpredictable effects if hwmod data is later added that
1201 * causes data ordering to change. Returns 0 upon success or a
1202 * negative error code upon error.
1204 static int _get_addr_space_by_name(struct omap_hwmod
*oh
, const char *name
,
1205 u32
*pa_start
, u32
*pa_end
)
1208 struct omap_hwmod_ocp_if
*os
;
1209 struct list_head
*p
= NULL
;
1212 p
= oh
->slave_ports
.next
;
1215 while (i
< oh
->slaves_cnt
) {
1216 os
= _fetch_next_ocp_if(&p
, &i
);
1222 while (os
->addr
[j
].pa_start
!= os
->addr
[j
].pa_end
) {
1223 if (name
== os
->addr
[j
].name
||
1224 !strcmp(name
, os
->addr
[j
].name
)) {
1238 *pa_start
= os
->addr
[j
].pa_start
;
1239 *pa_end
= os
->addr
[j
].pa_end
;
1245 * _save_mpu_port_index - find and save the index to @oh's MPU port
1246 * @oh: struct omap_hwmod *
1248 * Determines the array index of the OCP slave port that the MPU uses
1249 * to address the device, and saves it into the struct omap_hwmod.
1250 * Intended to be called during hwmod registration only. No return
1253 static void __init
_save_mpu_port_index(struct omap_hwmod
*oh
)
1255 struct omap_hwmod_ocp_if
*os
= NULL
;
1256 struct list_head
*p
;
1262 oh
->_int_flags
|= _HWMOD_NO_MPU_PORT
;
1264 p
= oh
->slave_ports
.next
;
1266 while (i
< oh
->slaves_cnt
) {
1267 os
= _fetch_next_ocp_if(&p
, &i
);
1268 if (os
->user
& OCP_USER_MPU
) {
1270 oh
->_int_flags
&= ~_HWMOD_NO_MPU_PORT
;
1279 * _find_mpu_rt_port - return omap_hwmod_ocp_if accessible by the MPU
1280 * @oh: struct omap_hwmod *
1282 * Given a pointer to a struct omap_hwmod record @oh, return a pointer
1283 * to the struct omap_hwmod_ocp_if record that is used by the MPU to
1284 * communicate with the IP block. This interface need not be directly
1285 * connected to the MPU (and almost certainly is not), but is directly
1286 * connected to the IP block represented by @oh. Returns a pointer
1287 * to the struct omap_hwmod_ocp_if * upon success, or returns NULL upon
1288 * error or if there does not appear to be a path from the MPU to this
1291 static struct omap_hwmod_ocp_if
*_find_mpu_rt_port(struct omap_hwmod
*oh
)
1293 if (!oh
|| oh
->_int_flags
& _HWMOD_NO_MPU_PORT
|| oh
->slaves_cnt
== 0)
1296 return oh
->_mpu_port
;
1300 * _find_mpu_rt_addr_space - return MPU register target address space for @oh
1301 * @oh: struct omap_hwmod *
1303 * Returns a pointer to the struct omap_hwmod_addr_space record representing
1304 * the register target MPU address space; or returns NULL upon error.
1306 static struct omap_hwmod_addr_space
* __init
_find_mpu_rt_addr_space(struct omap_hwmod
*oh
)
1308 struct omap_hwmod_ocp_if
*os
;
1309 struct omap_hwmod_addr_space
*mem
;
1310 int found
= 0, i
= 0;
1312 os
= _find_mpu_rt_port(oh
);
1313 if (!os
|| !os
->addr
)
1317 mem
= &os
->addr
[i
++];
1318 if (mem
->flags
& ADDR_TYPE_RT
)
1320 } while (!found
&& mem
->pa_start
!= mem
->pa_end
);
1322 return (found
) ? mem
: NULL
;
1326 * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG
1327 * @oh: struct omap_hwmod *
1329 * Ensure that the OCP_SYSCONFIG register for the IP block represented
1330 * by @oh is set to indicate to the PRCM that the IP block is active.
1331 * Usually this means placing the module into smart-idle mode and
1332 * smart-standby, but if there is a bug in the automatic idle handling
1333 * for the IP block, it may need to be placed into the force-idle or
1334 * no-idle variants of these modes. No return value.
1336 static void _enable_sysc(struct omap_hwmod
*oh
)
1341 struct clockdomain
*clkdm
;
1343 if (!oh
->class->sysc
)
1347 * Wait until reset has completed, this is needed as the IP
1348 * block is reset automatically by hardware in some cases
1349 * (off-mode for example), and the drivers require the
1350 * IP to be ready when they access it
1352 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1353 _enable_optional_clocks(oh
);
1354 _wait_softreset_complete(oh
);
1355 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1356 _disable_optional_clocks(oh
);
1358 v
= oh
->_sysc_cache
;
1359 sf
= oh
->class->sysc
->sysc_flags
;
1361 clkdm
= _get_clkdm(oh
);
1362 if (sf
& SYSC_HAS_SIDLEMODE
) {
1363 if (oh
->flags
& HWMOD_SWSUP_SIDLE
||
1364 oh
->flags
& HWMOD_SWSUP_SIDLE_ACT
) {
1365 idlemode
= HWMOD_IDLEMODE_NO
;
1367 if (sf
& SYSC_HAS_ENAWAKEUP
)
1368 _enable_wakeup(oh
, &v
);
1369 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
1370 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1372 idlemode
= HWMOD_IDLEMODE_SMART
;
1376 * This is special handling for some IPs like
1377 * 32k sync timer. Force them to idle!
1379 clkdm_act
= (clkdm
&& clkdm
->flags
& CLKDM_ACTIVE_WITH_MPU
);
1380 if (clkdm_act
&& !(oh
->class->sysc
->idlemodes
&
1381 (SIDLE_SMART
| SIDLE_SMART_WKUP
)))
1382 idlemode
= HWMOD_IDLEMODE_FORCE
;
1384 _set_slave_idlemode(oh
, idlemode
, &v
);
1387 if (sf
& SYSC_HAS_MIDLEMODE
) {
1388 if (oh
->flags
& HWMOD_FORCE_MSTANDBY
) {
1389 idlemode
= HWMOD_IDLEMODE_FORCE
;
1390 } else if (oh
->flags
& HWMOD_SWSUP_MSTANDBY
) {
1391 idlemode
= HWMOD_IDLEMODE_NO
;
1393 if (sf
& SYSC_HAS_ENAWAKEUP
)
1394 _enable_wakeup(oh
, &v
);
1395 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
1396 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1398 idlemode
= HWMOD_IDLEMODE_SMART
;
1400 _set_master_standbymode(oh
, idlemode
, &v
);
1404 * XXX The clock framework should handle this, by
1405 * calling into this code. But this must wait until the
1406 * clock structures are tagged with omap_hwmod entries
1408 if ((oh
->flags
& HWMOD_SET_DEFAULT_CLOCKACT
) &&
1409 (sf
& SYSC_HAS_CLOCKACTIVITY
))
1410 _set_clockactivity(oh
, oh
->class->sysc
->clockact
, &v
);
1412 /* If the cached value is the same as the new value, skip the write */
1413 if (oh
->_sysc_cache
!= v
)
1414 _write_sysconfig(v
, oh
);
1417 * Set the autoidle bit only after setting the smartidle bit
1418 * Setting this will not have any impact on the other modules.
1420 if (sf
& SYSC_HAS_AUTOIDLE
) {
1421 idlemode
= (oh
->flags
& HWMOD_NO_OCP_AUTOIDLE
) ?
1423 _set_module_autoidle(oh
, idlemode
, &v
);
1424 _write_sysconfig(v
, oh
);
1429 * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG
1430 * @oh: struct omap_hwmod *
1432 * If module is marked as SWSUP_SIDLE, force the module into slave
1433 * idle; otherwise, configure it for smart-idle. If module is marked
1434 * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
1435 * configure it for smart-standby. No return value.
1437 static void _idle_sysc(struct omap_hwmod
*oh
)
1442 if (!oh
->class->sysc
)
1445 v
= oh
->_sysc_cache
;
1446 sf
= oh
->class->sysc
->sysc_flags
;
1448 if (sf
& SYSC_HAS_SIDLEMODE
) {
1449 if (oh
->flags
& HWMOD_SWSUP_SIDLE
) {
1450 idlemode
= HWMOD_IDLEMODE_FORCE
;
1452 if (sf
& SYSC_HAS_ENAWAKEUP
)
1453 _enable_wakeup(oh
, &v
);
1454 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
1455 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1457 idlemode
= HWMOD_IDLEMODE_SMART
;
1459 _set_slave_idlemode(oh
, idlemode
, &v
);
1462 if (sf
& SYSC_HAS_MIDLEMODE
) {
1463 if ((oh
->flags
& HWMOD_SWSUP_MSTANDBY
) ||
1464 (oh
->flags
& HWMOD_FORCE_MSTANDBY
)) {
1465 idlemode
= HWMOD_IDLEMODE_FORCE
;
1467 if (sf
& SYSC_HAS_ENAWAKEUP
)
1468 _enable_wakeup(oh
, &v
);
1469 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
1470 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1472 idlemode
= HWMOD_IDLEMODE_SMART
;
1474 _set_master_standbymode(oh
, idlemode
, &v
);
1477 _write_sysconfig(v
, oh
);
1481 * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG
1482 * @oh: struct omap_hwmod *
1484 * Force the module into slave idle and master suspend. No return
1487 static void _shutdown_sysc(struct omap_hwmod
*oh
)
1492 if (!oh
->class->sysc
)
1495 v
= oh
->_sysc_cache
;
1496 sf
= oh
->class->sysc
->sysc_flags
;
1498 if (sf
& SYSC_HAS_SIDLEMODE
)
1499 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_FORCE
, &v
);
1501 if (sf
& SYSC_HAS_MIDLEMODE
)
1502 _set_master_standbymode(oh
, HWMOD_IDLEMODE_FORCE
, &v
);
1504 if (sf
& SYSC_HAS_AUTOIDLE
)
1505 _set_module_autoidle(oh
, 1, &v
);
1507 _write_sysconfig(v
, oh
);
1511 * _lookup - find an omap_hwmod by name
1512 * @name: find an omap_hwmod by name
1514 * Return a pointer to an omap_hwmod by name, or NULL if not found.
1516 static struct omap_hwmod
*_lookup(const char *name
)
1518 struct omap_hwmod
*oh
, *temp_oh
;
1522 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
1523 if (!strcmp(name
, temp_oh
->name
)) {
1533 * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
1534 * @oh: struct omap_hwmod *
1536 * Convert a clockdomain name stored in a struct omap_hwmod into a
1537 * clockdomain pointer, and save it into the struct omap_hwmod.
1538 * Return -EINVAL if the clkdm_name lookup failed.
1540 static int _init_clkdm(struct omap_hwmod
*oh
)
1542 if (!oh
->clkdm_name
) {
1543 pr_debug("omap_hwmod: %s: missing clockdomain\n", oh
->name
);
1547 oh
->clkdm
= clkdm_lookup(oh
->clkdm_name
);
1549 pr_warn("omap_hwmod: %s: could not associate to clkdm %s\n",
1550 oh
->name
, oh
->clkdm_name
);
1554 pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
1555 oh
->name
, oh
->clkdm_name
);
1561 * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
1562 * well the clockdomain.
1563 * @oh: struct omap_hwmod *
1564 * @data: not used; pass NULL
1566 * Called by omap_hwmod_setup_*() (after omap2_clk_init()).
1567 * Resolves all clock names embedded in the hwmod. Returns 0 on
1568 * success, or a negative error code on failure.
1570 static int _init_clocks(struct omap_hwmod
*oh
, void *data
)
1574 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
)
1577 pr_debug("omap_hwmod: %s: looking up clocks\n", oh
->name
);
1579 if (soc_ops
.init_clkdm
)
1580 ret
|= soc_ops
.init_clkdm(oh
);
1582 ret
|= _init_main_clk(oh
);
1583 ret
|= _init_interface_clks(oh
);
1584 ret
|= _init_opt_clks(oh
);
1587 oh
->_state
= _HWMOD_STATE_CLKS_INITED
;
1589 pr_warn("omap_hwmod: %s: cannot _init_clocks\n", oh
->name
);
1595 * _lookup_hardreset - fill register bit info for this hwmod/reset line
1596 * @oh: struct omap_hwmod *
1597 * @name: name of the reset line in the context of this hwmod
1598 * @ohri: struct omap_hwmod_rst_info * that this function will fill in
1600 * Return the bit position of the reset line that match the
1601 * input name. Return -ENOENT if not found.
1603 static int _lookup_hardreset(struct omap_hwmod
*oh
, const char *name
,
1604 struct omap_hwmod_rst_info
*ohri
)
1608 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++) {
1609 const char *rst_line
= oh
->rst_lines
[i
].name
;
1610 if (!strcmp(rst_line
, name
)) {
1611 ohri
->rst_shift
= oh
->rst_lines
[i
].rst_shift
;
1612 ohri
->st_shift
= oh
->rst_lines
[i
].st_shift
;
1613 pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n",
1614 oh
->name
, __func__
, rst_line
, ohri
->rst_shift
,
1625 * _assert_hardreset - assert the HW reset line of submodules
1626 * contained in the hwmod module.
1627 * @oh: struct omap_hwmod *
1628 * @name: name of the reset line to lookup and assert
1630 * Some IP like dsp, ipu or iva contain processor that require an HW
1631 * reset line to be assert / deassert in order to enable fully the IP.
1632 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1633 * asserting the hardreset line on the currently-booted SoC, or passes
1634 * along the return value from _lookup_hardreset() or the SoC's
1635 * assert_hardreset code.
1637 static int _assert_hardreset(struct omap_hwmod
*oh
, const char *name
)
1639 struct omap_hwmod_rst_info ohri
;
1645 if (!soc_ops
.assert_hardreset
)
1648 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1652 ret
= soc_ops
.assert_hardreset(oh
, &ohri
);
1658 * _deassert_hardreset - deassert the HW reset line of submodules contained
1659 * in the hwmod module.
1660 * @oh: struct omap_hwmod *
1661 * @name: name of the reset line to look up and deassert
1663 * Some IP like dsp, ipu or iva contain processor that require an HW
1664 * reset line to be assert / deassert in order to enable fully the IP.
1665 * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of
1666 * deasserting the hardreset line on the currently-booted SoC, or passes
1667 * along the return value from _lookup_hardreset() or the SoC's
1668 * deassert_hardreset code.
1670 static int _deassert_hardreset(struct omap_hwmod
*oh
, const char *name
)
1672 struct omap_hwmod_rst_info ohri
;
1679 if (!soc_ops
.deassert_hardreset
)
1682 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1688 * A clockdomain must be in SW_SUP otherwise reset
1689 * might not be completed. The clockdomain can be set
1690 * in HW_AUTO only when the module become ready.
1692 hwsup
= clkdm_in_hwsup(oh
->clkdm
);
1693 ret
= clkdm_hwmod_enable(oh
->clkdm
, oh
);
1695 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
1696 oh
->name
, oh
->clkdm
->name
, ret
);
1702 if (soc_ops
.enable_module
)
1703 soc_ops
.enable_module(oh
);
1705 ret
= soc_ops
.deassert_hardreset(oh
, &ohri
);
1707 if (soc_ops
.disable_module
)
1708 soc_ops
.disable_module(oh
);
1709 _disable_clocks(oh
);
1712 pr_warn("omap_hwmod: %s: failed to hardreset\n", oh
->name
);
1716 * Set the clockdomain to HW_AUTO, assuming that the
1717 * previous state was HW_AUTO.
1720 clkdm_allow_idle(oh
->clkdm
);
1722 clkdm_hwmod_disable(oh
->clkdm
, oh
);
1729 * _read_hardreset - read the HW reset line state of submodules
1730 * contained in the hwmod module
1731 * @oh: struct omap_hwmod *
1732 * @name: name of the reset line to look up and read
1734 * Return the state of the reset line. Returns -EINVAL if @oh is
1735 * null, -ENOSYS if we have no way of reading the hardreset line
1736 * status on the currently-booted SoC, or passes along the return
1737 * value from _lookup_hardreset() or the SoC's is_hardreset_asserted
1740 static int _read_hardreset(struct omap_hwmod
*oh
, const char *name
)
1742 struct omap_hwmod_rst_info ohri
;
1748 if (!soc_ops
.is_hardreset_asserted
)
1751 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1755 return soc_ops
.is_hardreset_asserted(oh
, &ohri
);
1759 * _are_all_hardreset_lines_asserted - return true if the @oh is hard-reset
1760 * @oh: struct omap_hwmod *
1762 * If all hardreset lines associated with @oh are asserted, then return true.
1763 * Otherwise, if part of @oh is out hardreset or if no hardreset lines
1764 * associated with @oh are asserted, then return false.
1765 * This function is used to avoid executing some parts of the IP block
1766 * enable/disable sequence if its hardreset line is set.
1768 static bool _are_all_hardreset_lines_asserted(struct omap_hwmod
*oh
)
1772 if (oh
->rst_lines_cnt
== 0)
1775 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
1776 if (_read_hardreset(oh
, oh
->rst_lines
[i
].name
) > 0)
1779 if (oh
->rst_lines_cnt
== rst_cnt
)
1786 * _are_any_hardreset_lines_asserted - return true if any part of @oh is
1788 * @oh: struct omap_hwmod *
1790 * If any hardreset lines associated with @oh are asserted, then
1791 * return true. Otherwise, if no hardreset lines associated with @oh
1792 * are asserted, or if @oh has no hardreset lines, then return false.
1793 * This function is used to avoid executing some parts of the IP block
1794 * enable/disable sequence if any hardreset line is set.
1796 static bool _are_any_hardreset_lines_asserted(struct omap_hwmod
*oh
)
1801 for (i
= 0; i
< oh
->rst_lines_cnt
&& rst_cnt
== 0; i
++)
1802 if (_read_hardreset(oh
, oh
->rst_lines
[i
].name
) > 0)
1805 return (rst_cnt
) ? true : false;
1809 * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
1810 * @oh: struct omap_hwmod *
1812 * Disable the PRCM module mode related to the hwmod @oh.
1813 * Return EINVAL if the modulemode is not supported and 0 in case of success.
1815 static int _omap4_disable_module(struct omap_hwmod
*oh
)
1819 if (!oh
->clkdm
|| !oh
->prcm
.omap4
.modulemode
)
1823 * Since integration code might still be doing something, only
1824 * disable if all lines are under hardreset.
1826 if (_are_any_hardreset_lines_asserted(oh
))
1829 pr_debug("omap_hwmod: %s: %s\n", oh
->name
, __func__
);
1831 omap_cm_module_disable(oh
->clkdm
->prcm_partition
, oh
->clkdm
->cm_inst
,
1832 oh
->prcm
.omap4
.clkctrl_offs
);
1834 v
= _omap4_wait_target_disable(oh
);
1836 pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
1843 * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit
1844 * @oh: struct omap_hwmod *
1846 * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
1847 * enabled for this to work. Returns -ENOENT if the hwmod cannot be
1848 * reset this way, -EINVAL if the hwmod is in the wrong state,
1849 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1851 * In OMAP3 a specific SYSSTATUS register is used to get the reset status.
1852 * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead
1853 * use the SYSCONFIG softreset bit to provide the status.
1855 * Note that some IP like McBSP do have reset control but don't have
1858 static int _ocp_softreset(struct omap_hwmod
*oh
)
1864 if (!oh
->class->sysc
||
1865 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SOFTRESET
))
1868 /* clocks must be on for this operation */
1869 if (oh
->_state
!= _HWMOD_STATE_ENABLED
) {
1870 pr_warn("omap_hwmod: %s: reset can only be entered from enabled state\n",
1875 /* For some modules, all optionnal clocks need to be enabled as well */
1876 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1877 _enable_optional_clocks(oh
);
1879 pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh
->name
);
1881 v
= oh
->_sysc_cache
;
1882 ret
= _set_softreset(oh
, &v
);
1886 _write_sysconfig(v
, oh
);
1888 if (oh
->class->sysc
->srst_udelay
)
1889 udelay(oh
->class->sysc
->srst_udelay
);
1891 c
= _wait_softreset_complete(oh
);
1892 if (c
== MAX_MODULE_SOFTRESET_WAIT
) {
1893 pr_warn("omap_hwmod: %s: softreset failed (waited %d usec)\n",
1894 oh
->name
, MAX_MODULE_SOFTRESET_WAIT
);
1898 pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh
->name
, c
);
1901 ret
= _clear_softreset(oh
, &v
);
1905 _write_sysconfig(v
, oh
);
1908 * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
1909 * _wait_target_ready() or _reset()
1913 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1914 _disable_optional_clocks(oh
);
1920 * _reset - reset an omap_hwmod
1921 * @oh: struct omap_hwmod *
1923 * Resets an omap_hwmod @oh. If the module has a custom reset
1924 * function pointer defined, then call it to reset the IP block, and
1925 * pass along its return value to the caller. Otherwise, if the IP
1926 * block has an OCP_SYSCONFIG register with a SOFTRESET bitfield
1927 * associated with it, call a function to reset the IP block via that
1928 * method, and pass along the return value to the caller. Finally, if
1929 * the IP block has some hardreset lines associated with it, assert
1930 * all of those, but do _not_ deassert them. (This is because driver
1931 * authors have expressed an apparent requirement to control the
1932 * deassertion of the hardreset lines themselves.)
1934 * The default software reset mechanism for most OMAP IP blocks is
1935 * triggered via the OCP_SYSCONFIG.SOFTRESET bit. However, some
1936 * hwmods cannot be reset via this method. Some are not targets and
1937 * therefore have no OCP header registers to access. Others (like the
1938 * IVA) have idiosyncratic reset sequences. So for these relatively
1939 * rare cases, custom reset code can be supplied in the struct
1940 * omap_hwmod_class .reset function pointer.
1942 * _set_dmadisable() is called to set the DMADISABLE bit so that it
1943 * does not prevent idling of the system. This is necessary for cases
1944 * where ROMCODE/BOOTLOADER uses dma and transfers control to the
1945 * kernel without disabling dma.
1947 * Passes along the return value from either _ocp_softreset() or the
1948 * custom reset function - these must return -EINVAL if the hwmod
1949 * cannot be reset this way or if the hwmod is in the wrong state,
1950 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1952 static int _reset(struct omap_hwmod
*oh
)
1956 pr_debug("omap_hwmod: %s: resetting\n", oh
->name
);
1958 if (oh
->class->reset
) {
1959 r
= oh
->class->reset(oh
);
1961 if (oh
->rst_lines_cnt
> 0) {
1962 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
1963 _assert_hardreset(oh
, oh
->rst_lines
[i
].name
);
1966 r
= _ocp_softreset(oh
);
1972 _set_dmadisable(oh
);
1975 * OCP_SYSCONFIG bits need to be reprogrammed after a
1976 * softreset. The _enable() function should be split to avoid
1977 * the rewrite of the OCP_SYSCONFIG register.
1979 if (oh
->class->sysc
) {
1980 _update_sysc_cache(oh
);
1988 * _reconfigure_io_chain - clear any I/O chain wakeups and reconfigure chain
1990 * Call the appropriate PRM function to clear any logged I/O chain
1991 * wakeups and to reconfigure the chain. This apparently needs to be
1992 * done upon every mux change. Since hwmods can be concurrently
1993 * enabled and idled, hold a spinlock around the I/O chain
1994 * reconfiguration sequence. No return value.
1996 * XXX When the PRM code is moved to drivers, this function can be removed,
1997 * as the PRM infrastructure should abstract this.
1999 static void _reconfigure_io_chain(void)
2001 unsigned long flags
;
2003 spin_lock_irqsave(&io_chain_lock
, flags
);
2005 omap_prm_reconfigure_io_chain();
2007 spin_unlock_irqrestore(&io_chain_lock
, flags
);
2011 * _omap4_update_context_lost - increment hwmod context loss counter if
2012 * hwmod context was lost, and clear hardware context loss reg
2013 * @oh: hwmod to check for context loss
2015 * If the PRCM indicates that the hwmod @oh lost context, increment
2016 * our in-memory context loss counter, and clear the RM_*_CONTEXT
2017 * bits. No return value.
2019 static void _omap4_update_context_lost(struct omap_hwmod
*oh
)
2021 if (oh
->prcm
.omap4
.flags
& HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT
)
2024 if (!prm_was_any_context_lost_old(oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
2025 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
2026 oh
->prcm
.omap4
.context_offs
))
2029 oh
->prcm
.omap4
.context_lost_counter
++;
2030 prm_clear_context_loss_flags_old(oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
2031 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
2032 oh
->prcm
.omap4
.context_offs
);
2036 * _omap4_get_context_lost - get context loss counter for a hwmod
2037 * @oh: hwmod to get context loss counter for
2039 * Returns the in-memory context loss counter for a hwmod.
2041 static int _omap4_get_context_lost(struct omap_hwmod
*oh
)
2043 return oh
->prcm
.omap4
.context_lost_counter
;
2047 * _enable_preprogram - Pre-program an IP block during the _enable() process
2048 * @oh: struct omap_hwmod *
2050 * Some IP blocks (such as AESS) require some additional programming
2051 * after enable before they can enter idle. If a function pointer to
2052 * do so is present in the hwmod data, then call it and pass along the
2053 * return value; otherwise, return 0.
2055 static int _enable_preprogram(struct omap_hwmod
*oh
)
2057 if (!oh
->class->enable_preprogram
)
2060 return oh
->class->enable_preprogram(oh
);
2064 * _enable - enable an omap_hwmod
2065 * @oh: struct omap_hwmod *
2067 * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
2068 * register target. Returns -EINVAL if the hwmod is in the wrong
2069 * state or passes along the return value of _wait_target_ready().
2071 static int _enable(struct omap_hwmod
*oh
)
2076 pr_debug("omap_hwmod: %s: enabling\n", oh
->name
);
2079 * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled
2080 * state at init. Now that someone is really trying to enable
2081 * them, just ensure that the hwmod mux is set.
2083 if (oh
->_int_flags
& _HWMOD_SKIP_ENABLE
) {
2085 * If the caller has mux data populated, do the mux'ing
2086 * which wouldn't have been done as part of the _enable()
2087 * done during setup.
2090 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_ENABLED
);
2092 oh
->_int_flags
&= ~_HWMOD_SKIP_ENABLE
;
2096 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
&&
2097 oh
->_state
!= _HWMOD_STATE_IDLE
&&
2098 oh
->_state
!= _HWMOD_STATE_DISABLED
) {
2099 WARN(1, "omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state\n",
2105 * If an IP block contains HW reset lines and all of them are
2106 * asserted, we let integration code associated with that
2107 * block handle the enable. We've received very little
2108 * information on what those driver authors need, and until
2109 * detailed information is provided and the driver code is
2110 * posted to the public lists, this is probably the best we
2113 if (_are_all_hardreset_lines_asserted(oh
))
2116 /* Mux pins for device runtime if populated */
2117 if (oh
->mux
&& (!oh
->mux
->enabled
||
2118 ((oh
->_state
== _HWMOD_STATE_IDLE
) &&
2119 oh
->mux
->pads_dynamic
))) {
2120 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_ENABLED
);
2121 _reconfigure_io_chain();
2122 } else if (oh
->flags
& HWMOD_RECONFIG_IO_CHAIN
) {
2123 _reconfigure_io_chain();
2126 _add_initiator_dep(oh
, mpu_oh
);
2130 * A clockdomain must be in SW_SUP before enabling
2131 * completely the module. The clockdomain can be set
2132 * in HW_AUTO only when the module become ready.
2134 hwsup
= clkdm_in_hwsup(oh
->clkdm
) &&
2135 !clkdm_missing_idle_reporting(oh
->clkdm
);
2136 r
= clkdm_hwmod_enable(oh
->clkdm
, oh
);
2138 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
2139 oh
->name
, oh
->clkdm
->name
, r
);
2145 if (soc_ops
.enable_module
)
2146 soc_ops
.enable_module(oh
);
2147 if (oh
->flags
& HWMOD_BLOCK_WFI
)
2148 cpu_idle_poll_ctrl(true);
2150 if (soc_ops
.update_context_lost
)
2151 soc_ops
.update_context_lost(oh
);
2153 r
= (soc_ops
.wait_target_ready
) ? soc_ops
.wait_target_ready(oh
) :
2157 * Set the clockdomain to HW_AUTO only if the target is ready,
2158 * assuming that the previous state was HW_AUTO
2160 if (oh
->clkdm
&& hwsup
)
2161 clkdm_allow_idle(oh
->clkdm
);
2163 oh
->_state
= _HWMOD_STATE_ENABLED
;
2165 /* Access the sysconfig only if the target is ready */
2166 if (oh
->class->sysc
) {
2167 if (!(oh
->_int_flags
& _HWMOD_SYSCONFIG_LOADED
))
2168 _update_sysc_cache(oh
);
2171 r
= _enable_preprogram(oh
);
2173 if (soc_ops
.disable_module
)
2174 soc_ops
.disable_module(oh
);
2175 _disable_clocks(oh
);
2176 pr_err("omap_hwmod: %s: _wait_target_ready failed: %d\n",
2180 clkdm_hwmod_disable(oh
->clkdm
, oh
);
2187 * _idle - idle an omap_hwmod
2188 * @oh: struct omap_hwmod *
2190 * Idles an omap_hwmod @oh. This should be called once the hwmod has
2191 * no further work. Returns -EINVAL if the hwmod is in the wrong
2192 * state or returns 0.
2194 static int _idle(struct omap_hwmod
*oh
)
2196 pr_debug("omap_hwmod: %s: idling\n", oh
->name
);
2198 if (oh
->_state
!= _HWMOD_STATE_ENABLED
) {
2199 WARN(1, "omap_hwmod: %s: idle state can only be entered from enabled state\n",
2204 if (_are_all_hardreset_lines_asserted(oh
))
2207 if (oh
->class->sysc
)
2209 _del_initiator_dep(oh
, mpu_oh
);
2211 if (oh
->flags
& HWMOD_BLOCK_WFI
)
2212 cpu_idle_poll_ctrl(false);
2213 if (soc_ops
.disable_module
)
2214 soc_ops
.disable_module(oh
);
2217 * The module must be in idle mode before disabling any parents
2218 * clocks. Otherwise, the parent clock might be disabled before
2219 * the module transition is done, and thus will prevent the
2220 * transition to complete properly.
2222 _disable_clocks(oh
);
2224 clkdm_hwmod_disable(oh
->clkdm
, oh
);
2226 /* Mux pins for device idle if populated */
2227 if (oh
->mux
&& oh
->mux
->pads_dynamic
) {
2228 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_IDLE
);
2229 _reconfigure_io_chain();
2230 } else if (oh
->flags
& HWMOD_RECONFIG_IO_CHAIN
) {
2231 _reconfigure_io_chain();
2234 oh
->_state
= _HWMOD_STATE_IDLE
;
2240 * _shutdown - shutdown an omap_hwmod
2241 * @oh: struct omap_hwmod *
2243 * Shut down an omap_hwmod @oh. This should be called when the driver
2244 * used for the hwmod is removed or unloaded or if the driver is not
2245 * used by the system. Returns -EINVAL if the hwmod is in the wrong
2246 * state or returns 0.
2248 static int _shutdown(struct omap_hwmod
*oh
)
2253 if (oh
->_state
!= _HWMOD_STATE_IDLE
&&
2254 oh
->_state
!= _HWMOD_STATE_ENABLED
) {
2255 WARN(1, "omap_hwmod: %s: disabled state can only be entered from idle, or enabled state\n",
2260 if (_are_all_hardreset_lines_asserted(oh
))
2263 pr_debug("omap_hwmod: %s: disabling\n", oh
->name
);
2265 if (oh
->class->pre_shutdown
) {
2266 prev_state
= oh
->_state
;
2267 if (oh
->_state
== _HWMOD_STATE_IDLE
)
2269 ret
= oh
->class->pre_shutdown(oh
);
2271 if (prev_state
== _HWMOD_STATE_IDLE
)
2277 if (oh
->class->sysc
) {
2278 if (oh
->_state
== _HWMOD_STATE_IDLE
)
2283 /* clocks and deps are already disabled in idle */
2284 if (oh
->_state
== _HWMOD_STATE_ENABLED
) {
2285 _del_initiator_dep(oh
, mpu_oh
);
2286 /* XXX what about the other system initiators here? dma, dsp */
2287 if (oh
->flags
& HWMOD_BLOCK_WFI
)
2288 cpu_idle_poll_ctrl(false);
2289 if (soc_ops
.disable_module
)
2290 soc_ops
.disable_module(oh
);
2291 _disable_clocks(oh
);
2293 clkdm_hwmod_disable(oh
->clkdm
, oh
);
2295 /* XXX Should this code also force-disable the optional clocks? */
2297 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
2298 _assert_hardreset(oh
, oh
->rst_lines
[i
].name
);
2300 /* Mux pins to safe mode or use populated off mode values */
2302 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_DISABLED
);
2304 oh
->_state
= _HWMOD_STATE_DISABLED
;
2309 static int of_dev_find_hwmod(struct device_node
*np
,
2310 struct omap_hwmod
*oh
)
2315 count
= of_property_count_strings(np
, "ti,hwmods");
2319 for (i
= 0; i
< count
; i
++) {
2320 res
= of_property_read_string_index(np
, "ti,hwmods",
2324 if (!strcmp(p
, oh
->name
)) {
2325 pr_debug("omap_hwmod: dt %s[%i] uses hwmod %s\n",
2326 np
->name
, i
, oh
->name
);
2335 * of_dev_hwmod_lookup - look up needed hwmod from dt blob
2336 * @np: struct device_node *
2337 * @oh: struct omap_hwmod *
2338 * @index: index of the entry found
2339 * @found: struct device_node * found or NULL
2341 * Parse the dt blob and find out needed hwmod. Recursive function is
2342 * implemented to take care hierarchical dt blob parsing.
2343 * Return: Returns 0 on success, -ENODEV when not found.
2345 static int of_dev_hwmod_lookup(struct device_node
*np
,
2346 struct omap_hwmod
*oh
,
2348 struct device_node
**found
)
2350 struct device_node
*np0
= NULL
;
2353 res
= of_dev_find_hwmod(np
, oh
);
2360 for_each_child_of_node(np
, np0
) {
2361 struct device_node
*fc
;
2364 res
= of_dev_hwmod_lookup(np0
, oh
, &i
, &fc
);
2379 * _init_mpu_rt_base - populate the virtual address for a hwmod
2380 * @oh: struct omap_hwmod * to locate the virtual address
2381 * @data: (unused, caller should pass NULL)
2382 * @index: index of the reg entry iospace in device tree
2383 * @np: struct device_node * of the IP block's device node in the DT data
2385 * Cache the virtual address used by the MPU to access this IP block's
2386 * registers. This address is needed early so the OCP registers that
2387 * are part of the device's address space can be ioremapped properly.
2389 * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and
2390 * -ENXIO on absent or invalid register target address space.
2392 static int __init
_init_mpu_rt_base(struct omap_hwmod
*oh
, void *data
,
2393 int index
, struct device_node
*np
)
2395 struct omap_hwmod_addr_space
*mem
;
2396 void __iomem
*va_start
= NULL
;
2401 _save_mpu_port_index(oh
);
2403 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
2406 mem
= _find_mpu_rt_addr_space(oh
);
2408 pr_debug("omap_hwmod: %s: no MPU register target found\n",
2411 /* Extract the IO space from device tree blob */
2415 va_start
= of_iomap(np
, index
+ oh
->mpu_rt_idx
);
2417 va_start
= ioremap(mem
->pa_start
, mem
->pa_end
- mem
->pa_start
);
2422 pr_err("omap_hwmod: %s: Could not ioremap\n", oh
->name
);
2424 pr_err("omap_hwmod: %s: Missing dt reg%i for %s\n",
2425 oh
->name
, index
, np
->full_name
);
2429 pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
2430 oh
->name
, va_start
);
2432 oh
->_mpu_rt_va
= va_start
;
2437 * _init - initialize internal data for the hwmod @oh
2438 * @oh: struct omap_hwmod *
2441 * Look up the clocks and the address space used by the MPU to access
2442 * registers belonging to the hwmod @oh. @oh must already be
2443 * registered at this point. This is the first of two phases for
2444 * hwmod initialization. Code called here does not touch any hardware
2445 * registers, it simply prepares internal data structures. Returns 0
2446 * upon success or if the hwmod isn't registered or if the hwmod's
2447 * address space is not defined, or -EINVAL upon failure.
2449 static int __init
_init(struct omap_hwmod
*oh
, void *data
)
2452 struct device_node
*np
= NULL
;
2454 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
)
2457 if (of_have_populated_dt()) {
2458 struct device_node
*bus
;
2460 bus
= of_find_node_by_name(NULL
, "ocp");
2464 r
= of_dev_hwmod_lookup(bus
, oh
, &index
, &np
);
2466 pr_debug("omap_hwmod: %s missing dt data\n", oh
->name
);
2467 else if (np
&& index
)
2468 pr_warn("omap_hwmod: %s using broken dt data from %s\n",
2469 oh
->name
, np
->name
);
2472 if (oh
->class->sysc
) {
2473 r
= _init_mpu_rt_base(oh
, NULL
, index
, np
);
2475 WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n",
2481 r
= _init_clocks(oh
, NULL
);
2483 WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh
->name
);
2488 if (of_find_property(np
, "ti,no-reset-on-init", NULL
))
2489 oh
->flags
|= HWMOD_INIT_NO_RESET
;
2490 if (of_find_property(np
, "ti,no-idle-on-init", NULL
))
2491 oh
->flags
|= HWMOD_INIT_NO_IDLE
;
2494 oh
->_state
= _HWMOD_STATE_INITIALIZED
;
2500 * _setup_iclk_autoidle - configure an IP block's interface clocks
2501 * @oh: struct omap_hwmod *
2503 * Set up the module's interface clocks. XXX This function is still mostly
2504 * a stub; implementing this properly requires iclk autoidle usecounting in
2505 * the clock code. No return value.
2507 static void __init
_setup_iclk_autoidle(struct omap_hwmod
*oh
)
2509 struct omap_hwmod_ocp_if
*os
;
2510 struct list_head
*p
;
2512 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2515 p
= oh
->slave_ports
.next
;
2517 while (i
< oh
->slaves_cnt
) {
2518 os
= _fetch_next_ocp_if(&p
, &i
);
2522 if (os
->flags
& OCPIF_SWSUP_IDLE
) {
2523 /* XXX omap_iclk_deny_idle(c); */
2525 /* XXX omap_iclk_allow_idle(c); */
2526 clk_enable(os
->_clk
);
2534 * _setup_reset - reset an IP block during the setup process
2535 * @oh: struct omap_hwmod *
2537 * Reset the IP block corresponding to the hwmod @oh during the setup
2538 * process. The IP block is first enabled so it can be successfully
2539 * reset. Returns 0 upon success or a negative error code upon
2542 static int __init
_setup_reset(struct omap_hwmod
*oh
)
2546 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2549 if (oh
->flags
& HWMOD_EXT_OPT_MAIN_CLK
)
2552 if (oh
->rst_lines_cnt
== 0) {
2555 pr_warn("omap_hwmod: %s: cannot be enabled for reset (%d)\n",
2556 oh
->name
, oh
->_state
);
2561 if (!(oh
->flags
& HWMOD_INIT_NO_RESET
))
2568 * _setup_postsetup - transition to the appropriate state after _setup
2569 * @oh: struct omap_hwmod *
2571 * Place an IP block represented by @oh into a "post-setup" state --
2572 * either IDLE, ENABLED, or DISABLED. ("post-setup" simply means that
2573 * this function is called at the end of _setup().) The postsetup
2574 * state for an IP block can be changed by calling
2575 * omap_hwmod_enter_postsetup_state() early in the boot process,
2576 * before one of the omap_hwmod_setup*() functions are called for the
2579 * The IP block stays in this state until a PM runtime-based driver is
2580 * loaded for that IP block. A post-setup state of IDLE is
2581 * appropriate for almost all IP blocks with runtime PM-enabled
2582 * drivers, since those drivers are able to enable the IP block. A
2583 * post-setup state of ENABLED is appropriate for kernels with PM
2584 * runtime disabled. The DISABLED state is appropriate for unusual IP
2585 * blocks such as the MPU WDTIMER on kernels without WDTIMER drivers
2586 * included, since the WDTIMER starts running on reset and will reset
2587 * the MPU if left active.
2589 * This post-setup mechanism is deprecated. Once all of the OMAP
2590 * drivers have been converted to use PM runtime, and all of the IP
2591 * block data and interconnect data is available to the hwmod code, it
2592 * should be possible to replace this mechanism with a "lazy reset"
2593 * arrangement. In a "lazy reset" setup, each IP block is enabled
2594 * when the driver first probes, then all remaining IP blocks without
2595 * drivers are either shut down or enabled after the drivers have
2596 * loaded. However, this cannot take place until the above
2597 * preconditions have been met, since otherwise the late reset code
2598 * has no way of knowing which IP blocks are in use by drivers, and
2599 * which ones are unused.
2603 static void __init
_setup_postsetup(struct omap_hwmod
*oh
)
2607 if (oh
->rst_lines_cnt
> 0)
2610 postsetup_state
= oh
->_postsetup_state
;
2611 if (postsetup_state
== _HWMOD_STATE_UNKNOWN
)
2612 postsetup_state
= _HWMOD_STATE_ENABLED
;
2615 * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data -
2616 * it should be set by the core code as a runtime flag during startup
2618 if ((oh
->flags
& HWMOD_INIT_NO_IDLE
) &&
2619 (postsetup_state
== _HWMOD_STATE_IDLE
)) {
2620 oh
->_int_flags
|= _HWMOD_SKIP_ENABLE
;
2621 postsetup_state
= _HWMOD_STATE_ENABLED
;
2624 if (postsetup_state
== _HWMOD_STATE_IDLE
)
2626 else if (postsetup_state
== _HWMOD_STATE_DISABLED
)
2628 else if (postsetup_state
!= _HWMOD_STATE_ENABLED
)
2629 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2630 oh
->name
, postsetup_state
);
2636 * _setup - prepare IP block hardware for use
2637 * @oh: struct omap_hwmod *
2638 * @n: (unused, pass NULL)
2640 * Configure the IP block represented by @oh. This may include
2641 * enabling the IP block, resetting it, and placing it into a
2642 * post-setup state, depending on the type of IP block and applicable
2643 * flags. IP blocks are reset to prevent any previous configuration
2644 * by the bootloader or previous operating system from interfering
2645 * with power management or other parts of the system. The reset can
2646 * be avoided; see omap_hwmod_no_setup_reset(). This is the second of
2647 * two phases for hwmod initialization. Code called here generally
2648 * affects the IP block hardware, or system integration hardware
2649 * associated with the IP block. Returns 0.
2651 static int __init
_setup(struct omap_hwmod
*oh
, void *data
)
2653 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2656 if (oh
->parent_hwmod
) {
2659 r
= _enable(oh
->parent_hwmod
);
2660 WARN(r
, "hwmod: %s: setup: failed to enable parent hwmod %s\n",
2661 oh
->name
, oh
->parent_hwmod
->name
);
2664 _setup_iclk_autoidle(oh
);
2666 if (!_setup_reset(oh
))
2667 _setup_postsetup(oh
);
2669 if (oh
->parent_hwmod
) {
2672 postsetup_state
= oh
->parent_hwmod
->_postsetup_state
;
2674 if (postsetup_state
== _HWMOD_STATE_IDLE
)
2675 _idle(oh
->parent_hwmod
);
2676 else if (postsetup_state
== _HWMOD_STATE_DISABLED
)
2677 _shutdown(oh
->parent_hwmod
);
2678 else if (postsetup_state
!= _HWMOD_STATE_ENABLED
)
2679 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2680 oh
->parent_hwmod
->name
, postsetup_state
);
2687 * _register - register a struct omap_hwmod
2688 * @oh: struct omap_hwmod *
2690 * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
2691 * already has been registered by the same name; -EINVAL if the
2692 * omap_hwmod is in the wrong state, if @oh is NULL, if the
2693 * omap_hwmod's class field is NULL; if the omap_hwmod is missing a
2694 * name, or if the omap_hwmod's class is missing a name; or 0 upon
2697 * XXX The data should be copied into bootmem, so the original data
2698 * should be marked __initdata and freed after init. This would allow
2699 * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
2700 * that the copy process would be relatively complex due to the large number
2703 static int __init
_register(struct omap_hwmod
*oh
)
2705 if (!oh
|| !oh
->name
|| !oh
->class || !oh
->class->name
||
2706 (oh
->_state
!= _HWMOD_STATE_UNKNOWN
))
2709 pr_debug("omap_hwmod: %s: registering\n", oh
->name
);
2711 if (_lookup(oh
->name
))
2714 list_add_tail(&oh
->node
, &omap_hwmod_list
);
2716 INIT_LIST_HEAD(&oh
->master_ports
);
2717 INIT_LIST_HEAD(&oh
->slave_ports
);
2718 spin_lock_init(&oh
->_lock
);
2719 lockdep_set_class(&oh
->_lock
, &oh
->hwmod_key
);
2721 oh
->_state
= _HWMOD_STATE_REGISTERED
;
2724 * XXX Rather than doing a strcmp(), this should test a flag
2725 * set in the hwmod data, inserted by the autogenerator code.
2727 if (!strcmp(oh
->name
, MPU_INITIATOR_NAME
))
2734 * _alloc_links - return allocated memory for hwmod links
2735 * @ml: pointer to a struct omap_hwmod_link * for the master link
2736 * @sl: pointer to a struct omap_hwmod_link * for the slave link
2738 * Return pointers to two struct omap_hwmod_link records, via the
2739 * addresses pointed to by @ml and @sl. Will first attempt to return
2740 * memory allocated as part of a large initial block, but if that has
2741 * been exhausted, will allocate memory itself. Since ideally this
2742 * second allocation path will never occur, the number of these
2743 * 'supplemental' allocations will be logged when debugging is
2744 * enabled. Returns 0.
2746 static int __init
_alloc_links(struct omap_hwmod_link
**ml
,
2747 struct omap_hwmod_link
**sl
)
2751 if ((free_ls
+ LINKS_PER_OCP_IF
) <= max_ls
) {
2752 *ml
= &linkspace
[free_ls
++];
2753 *sl
= &linkspace
[free_ls
++];
2757 sz
= sizeof(struct omap_hwmod_link
) * LINKS_PER_OCP_IF
;
2760 *ml
= memblock_virt_alloc(sz
, 0);
2762 *sl
= (void *)(*ml
) + sizeof(struct omap_hwmod_link
);
2765 pr_debug("omap_hwmod: supplemental link allocations needed: %d\n",
2766 ls_supp
* LINKS_PER_OCP_IF
);
2772 * _add_link - add an interconnect between two IP blocks
2773 * @oi: pointer to a struct omap_hwmod_ocp_if record
2775 * Add struct omap_hwmod_link records connecting the master IP block
2776 * specified in @oi->master to @oi, and connecting the slave IP block
2777 * specified in @oi->slave to @oi. This code is assumed to run before
2778 * preemption or SMP has been enabled, thus avoiding the need for
2779 * locking in this code. Changes to this assumption will require
2780 * additional locking. Returns 0.
2782 static int __init
_add_link(struct omap_hwmod_ocp_if
*oi
)
2784 struct omap_hwmod_link
*ml
, *sl
;
2786 pr_debug("omap_hwmod: %s -> %s: adding link\n", oi
->master
->name
,
2789 _alloc_links(&ml
, &sl
);
2792 list_add(&ml
->node
, &oi
->master
->master_ports
);
2793 oi
->master
->masters_cnt
++;
2796 list_add(&sl
->node
, &oi
->slave
->slave_ports
);
2797 oi
->slave
->slaves_cnt
++;
2803 * _register_link - register a struct omap_hwmod_ocp_if
2804 * @oi: struct omap_hwmod_ocp_if *
2806 * Registers the omap_hwmod_ocp_if record @oi. Returns -EEXIST if it
2807 * has already been registered; -EINVAL if @oi is NULL or if the
2808 * record pointed to by @oi is missing required fields; or 0 upon
2811 * XXX The data should be copied into bootmem, so the original data
2812 * should be marked __initdata and freed after init. This would allow
2813 * unneeded omap_hwmods to be freed on multi-OMAP configurations.
2815 static int __init
_register_link(struct omap_hwmod_ocp_if
*oi
)
2817 if (!oi
|| !oi
->master
|| !oi
->slave
|| !oi
->user
)
2820 if (oi
->_int_flags
& _OCPIF_INT_FLAGS_REGISTERED
)
2823 pr_debug("omap_hwmod: registering link from %s to %s\n",
2824 oi
->master
->name
, oi
->slave
->name
);
2827 * Register the connected hwmods, if they haven't been
2828 * registered already
2830 if (oi
->master
->_state
!= _HWMOD_STATE_REGISTERED
)
2831 _register(oi
->master
);
2833 if (oi
->slave
->_state
!= _HWMOD_STATE_REGISTERED
)
2834 _register(oi
->slave
);
2838 oi
->_int_flags
|= _OCPIF_INT_FLAGS_REGISTERED
;
2844 * _alloc_linkspace - allocate large block of hwmod links
2845 * @ois: pointer to an array of struct omap_hwmod_ocp_if records to count
2847 * Allocate a large block of struct omap_hwmod_link records. This
2848 * improves boot time significantly by avoiding the need to allocate
2849 * individual records one by one. If the number of records to
2850 * allocate in the block hasn't been manually specified, this function
2851 * will count the number of struct omap_hwmod_ocp_if records in @ois
2852 * and use that to determine the allocation size. For SoC families
2853 * that require multiple list registrations, such as OMAP3xxx, this
2854 * estimation process isn't optimal, so manual estimation is advised
2855 * in those cases. Returns -EEXIST if the allocation has already occurred
2856 * or 0 upon success.
2858 static int __init
_alloc_linkspace(struct omap_hwmod_ocp_if
**ois
)
2864 WARN(1, "linkspace already allocated\n");
2870 max_ls
+= LINKS_PER_OCP_IF
;
2872 sz
= sizeof(struct omap_hwmod_link
) * max_ls
;
2874 pr_debug("omap_hwmod: %s: allocating %d byte linkspace (%d links)\n",
2875 __func__
, sz
, max_ls
);
2877 linkspace
= memblock_virt_alloc(sz
, 0);
2882 /* Static functions intended only for use in soc_ops field function pointers */
2885 * _omap2xxx_3xxx_wait_target_ready - wait for a module to leave slave idle
2886 * @oh: struct omap_hwmod *
2888 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2889 * does not have an IDLEST bit or if the module successfully leaves
2890 * slave idle; otherwise, pass along the return value of the
2891 * appropriate *_cm*_wait_module_ready() function.
2893 static int _omap2xxx_3xxx_wait_target_ready(struct omap_hwmod
*oh
)
2898 if (oh
->flags
& HWMOD_NO_IDLEST
)
2901 if (!_find_mpu_rt_port(oh
))
2904 /* XXX check module SIDLEMODE, hardreset status, enabled clocks */
2906 return omap_cm_wait_module_ready(0, oh
->prcm
.omap2
.module_offs
,
2907 oh
->prcm
.omap2
.idlest_reg_id
,
2908 oh
->prcm
.omap2
.idlest_idle_bit
);
2912 * _omap4_wait_target_ready - wait for a module to leave slave idle
2913 * @oh: struct omap_hwmod *
2915 * Wait for a module @oh to leave slave idle. Returns 0 if the module
2916 * does not have an IDLEST bit or if the module successfully leaves
2917 * slave idle; otherwise, pass along the return value of the
2918 * appropriate *_cm*_wait_module_ready() function.
2920 static int _omap4_wait_target_ready(struct omap_hwmod
*oh
)
2925 if (oh
->flags
& HWMOD_NO_IDLEST
|| !oh
->clkdm
)
2928 if (!_find_mpu_rt_port(oh
))
2931 /* XXX check module SIDLEMODE, hardreset status */
2933 return omap_cm_wait_module_ready(oh
->clkdm
->prcm_partition
,
2935 oh
->prcm
.omap4
.clkctrl_offs
, 0);
2939 * _omap2_assert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2940 * @oh: struct omap_hwmod * to assert hardreset
2941 * @ohri: hardreset line data
2943 * Call omap2_prm_assert_hardreset() with parameters extracted from
2944 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2945 * use as an soc_ops function pointer. Passes along the return value
2946 * from omap2_prm_assert_hardreset(). XXX This function is scheduled
2947 * for removal when the PRM code is moved into drivers/.
2949 static int _omap2_assert_hardreset(struct omap_hwmod
*oh
,
2950 struct omap_hwmod_rst_info
*ohri
)
2952 return omap_prm_assert_hardreset(ohri
->rst_shift
, 0,
2953 oh
->prcm
.omap2
.module_offs
, 0);
2957 * _omap2_deassert_hardreset - call OMAP2 PRM hardreset fn with hwmod args
2958 * @oh: struct omap_hwmod * to deassert hardreset
2959 * @ohri: hardreset line data
2961 * Call omap2_prm_deassert_hardreset() with parameters extracted from
2962 * the hwmod @oh and the hardreset line data @ohri. Only intended for
2963 * use as an soc_ops function pointer. Passes along the return value
2964 * from omap2_prm_deassert_hardreset(). XXX This function is
2965 * scheduled for removal when the PRM code is moved into drivers/.
2967 static int _omap2_deassert_hardreset(struct omap_hwmod
*oh
,
2968 struct omap_hwmod_rst_info
*ohri
)
2970 return omap_prm_deassert_hardreset(ohri
->rst_shift
, ohri
->st_shift
, 0,
2971 oh
->prcm
.omap2
.module_offs
, 0, 0);
2975 * _omap2_is_hardreset_asserted - call OMAP2 PRM hardreset fn with hwmod args
2976 * @oh: struct omap_hwmod * to test hardreset
2977 * @ohri: hardreset line data
2979 * Call omap2_prm_is_hardreset_asserted() with parameters extracted
2980 * from the hwmod @oh and the hardreset line data @ohri. Only
2981 * intended for use as an soc_ops function pointer. Passes along the
2982 * return value from omap2_prm_is_hardreset_asserted(). XXX This
2983 * function is scheduled for removal when the PRM code is moved into
2986 static int _omap2_is_hardreset_asserted(struct omap_hwmod
*oh
,
2987 struct omap_hwmod_rst_info
*ohri
)
2989 return omap_prm_is_hardreset_asserted(ohri
->st_shift
, 0,
2990 oh
->prcm
.omap2
.module_offs
, 0);
2994 * _omap4_assert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
2995 * @oh: struct omap_hwmod * to assert hardreset
2996 * @ohri: hardreset line data
2998 * Call omap4_prminst_assert_hardreset() with parameters extracted
2999 * from the hwmod @oh and the hardreset line data @ohri. Only
3000 * intended for use as an soc_ops function pointer. Passes along the
3001 * return value from omap4_prminst_assert_hardreset(). XXX This
3002 * function is scheduled for removal when the PRM code is moved into
3005 static int _omap4_assert_hardreset(struct omap_hwmod
*oh
,
3006 struct omap_hwmod_rst_info
*ohri
)
3011 return omap_prm_assert_hardreset(ohri
->rst_shift
,
3012 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
3013 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
3014 oh
->prcm
.omap4
.rstctrl_offs
);
3018 * _omap4_deassert_hardreset - call OMAP4 PRM hardreset fn with hwmod args
3019 * @oh: struct omap_hwmod * to deassert hardreset
3020 * @ohri: hardreset line data
3022 * Call omap4_prminst_deassert_hardreset() with parameters extracted
3023 * from the hwmod @oh and the hardreset line data @ohri. Only
3024 * intended for use as an soc_ops function pointer. Passes along the
3025 * return value from omap4_prminst_deassert_hardreset(). XXX This
3026 * function is scheduled for removal when the PRM code is moved into
3029 static int _omap4_deassert_hardreset(struct omap_hwmod
*oh
,
3030 struct omap_hwmod_rst_info
*ohri
)
3036 pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
3037 oh
->name
, ohri
->name
);
3038 return omap_prm_deassert_hardreset(ohri
->rst_shift
, ohri
->rst_shift
,
3039 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
3040 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
3041 oh
->prcm
.omap4
.rstctrl_offs
,
3042 oh
->prcm
.omap4
.rstctrl_offs
+
3043 OMAP4_RST_CTRL_ST_OFFSET
);
3047 * _omap4_is_hardreset_asserted - call OMAP4 PRM hardreset fn with hwmod args
3048 * @oh: struct omap_hwmod * to test hardreset
3049 * @ohri: hardreset line data
3051 * Call omap4_prminst_is_hardreset_asserted() with parameters
3052 * extracted from the hwmod @oh and the hardreset line data @ohri.
3053 * Only intended for use as an soc_ops function pointer. Passes along
3054 * the return value from omap4_prminst_is_hardreset_asserted(). XXX
3055 * This function is scheduled for removal when the PRM code is moved
3058 static int _omap4_is_hardreset_asserted(struct omap_hwmod
*oh
,
3059 struct omap_hwmod_rst_info
*ohri
)
3064 return omap_prm_is_hardreset_asserted(ohri
->rst_shift
,
3065 oh
->clkdm
->pwrdm
.ptr
->
3067 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
3068 oh
->prcm
.omap4
.rstctrl_offs
);
3072 * _am33xx_deassert_hardreset - call AM33XX PRM hardreset fn with hwmod args
3073 * @oh: struct omap_hwmod * to deassert hardreset
3074 * @ohri: hardreset line data
3076 * Call am33xx_prminst_deassert_hardreset() with parameters extracted
3077 * from the hwmod @oh and the hardreset line data @ohri. Only
3078 * intended for use as an soc_ops function pointer. Passes along the
3079 * return value from am33xx_prminst_deassert_hardreset(). XXX This
3080 * function is scheduled for removal when the PRM code is moved into
3083 static int _am33xx_deassert_hardreset(struct omap_hwmod
*oh
,
3084 struct omap_hwmod_rst_info
*ohri
)
3086 return omap_prm_deassert_hardreset(ohri
->rst_shift
, ohri
->st_shift
,
3087 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
3088 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
3089 oh
->prcm
.omap4
.rstctrl_offs
,
3090 oh
->prcm
.omap4
.rstst_offs
);
3093 /* Public functions */
3095 u32
omap_hwmod_read(struct omap_hwmod
*oh
, u16 reg_offs
)
3097 if (oh
->flags
& HWMOD_16BIT_REG
)
3098 return readw_relaxed(oh
->_mpu_rt_va
+ reg_offs
);
3100 return readl_relaxed(oh
->_mpu_rt_va
+ reg_offs
);
3103 void omap_hwmod_write(u32 v
, struct omap_hwmod
*oh
, u16 reg_offs
)
3105 if (oh
->flags
& HWMOD_16BIT_REG
)
3106 writew_relaxed(v
, oh
->_mpu_rt_va
+ reg_offs
);
3108 writel_relaxed(v
, oh
->_mpu_rt_va
+ reg_offs
);
3112 * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit
3113 * @oh: struct omap_hwmod *
3115 * This is a public function exposed to drivers. Some drivers may need to do
3116 * some settings before and after resetting the device. Those drivers after
3117 * doing the necessary settings could use this function to start a reset by
3118 * setting the SYSCONFIG.SOFTRESET bit.
3120 int omap_hwmod_softreset(struct omap_hwmod
*oh
)
3125 if (!oh
|| !(oh
->_sysc_cache
))
3128 v
= oh
->_sysc_cache
;
3129 ret
= _set_softreset(oh
, &v
);
3132 _write_sysconfig(v
, oh
);
3134 ret
= _clear_softreset(oh
, &v
);
3137 _write_sysconfig(v
, oh
);
3144 * omap_hwmod_lookup - look up a registered omap_hwmod by name
3145 * @name: name of the omap_hwmod to look up
3147 * Given a @name of an omap_hwmod, return a pointer to the registered
3148 * struct omap_hwmod *, or NULL upon error.
3150 struct omap_hwmod
*omap_hwmod_lookup(const char *name
)
3152 struct omap_hwmod
*oh
;
3163 * omap_hwmod_for_each - call function for each registered omap_hwmod
3164 * @fn: pointer to a callback function
3165 * @data: void * data to pass to callback function
3167 * Call @fn for each registered omap_hwmod, passing @data to each
3168 * function. @fn must return 0 for success or any other value for
3169 * failure. If @fn returns non-zero, the iteration across omap_hwmods
3170 * will stop and the non-zero return value will be passed to the
3171 * caller of omap_hwmod_for_each(). @fn is called with
3172 * omap_hwmod_for_each() held.
3174 int omap_hwmod_for_each(int (*fn
)(struct omap_hwmod
*oh
, void *data
),
3177 struct omap_hwmod
*temp_oh
;
3183 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
3184 ret
= (*fn
)(temp_oh
, data
);
3193 * omap_hwmod_register_links - register an array of hwmod links
3194 * @ois: pointer to an array of omap_hwmod_ocp_if to register
3196 * Intended to be called early in boot before the clock framework is
3197 * initialized. If @ois is not null, will register all omap_hwmods
3198 * listed in @ois that are valid for this chip. Returns -EINVAL if
3199 * omap_hwmod_init() hasn't been called before calling this function,
3200 * -ENOMEM if the link memory area can't be allocated, or 0 upon
3203 int __init
omap_hwmod_register_links(struct omap_hwmod_ocp_if
**ois
)
3213 if (ois
[0] == NULL
) /* Empty list */
3217 if (_alloc_linkspace(ois
)) {
3218 pr_err("omap_hwmod: could not allocate link space\n");
3225 r
= _register_link(ois
[i
]);
3226 WARN(r
&& r
!= -EEXIST
,
3227 "omap_hwmod: _register_link(%s -> %s) returned %d\n",
3228 ois
[i
]->master
->name
, ois
[i
]->slave
->name
, r
);
3235 * _ensure_mpu_hwmod_is_setup - ensure the MPU SS hwmod is init'ed and set up
3236 * @oh: pointer to the hwmod currently being set up (usually not the MPU)
3238 * If the hwmod data corresponding to the MPU subsystem IP block
3239 * hasn't been initialized and set up yet, do so now. This must be
3240 * done first since sleep dependencies may be added from other hwmods
3241 * to the MPU. Intended to be called only by omap_hwmod_setup*(). No
3244 static void __init
_ensure_mpu_hwmod_is_setup(struct omap_hwmod
*oh
)
3246 if (!mpu_oh
|| mpu_oh
->_state
== _HWMOD_STATE_UNKNOWN
)
3247 pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n",
3248 __func__
, MPU_INITIATOR_NAME
);
3249 else if (mpu_oh
->_state
== _HWMOD_STATE_REGISTERED
&& oh
!= mpu_oh
)
3250 omap_hwmod_setup_one(MPU_INITIATOR_NAME
);
3254 * omap_hwmod_setup_one - set up a single hwmod
3255 * @oh_name: const char * name of the already-registered hwmod to set up
3257 * Initialize and set up a single hwmod. Intended to be used for a
3258 * small number of early devices, such as the timer IP blocks used for
3259 * the scheduler clock. Must be called after omap2_clk_init().
3260 * Resolves the struct clk names to struct clk pointers for each
3261 * registered omap_hwmod. Also calls _setup() on each hwmod. Returns
3262 * -EINVAL upon error or 0 upon success.
3264 int __init
omap_hwmod_setup_one(const char *oh_name
)
3266 struct omap_hwmod
*oh
;
3268 pr_debug("omap_hwmod: %s: %s\n", oh_name
, __func__
);
3270 oh
= _lookup(oh_name
);
3272 WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name
);
3276 _ensure_mpu_hwmod_is_setup(oh
);
3285 * omap_hwmod_setup_all - set up all registered IP blocks
3287 * Initialize and set up all IP blocks registered with the hwmod code.
3288 * Must be called after omap2_clk_init(). Resolves the struct clk
3289 * names to struct clk pointers for each registered omap_hwmod. Also
3290 * calls _setup() on each hwmod. Returns 0 upon success.
3292 static int __init
omap_hwmod_setup_all(void)
3294 _ensure_mpu_hwmod_is_setup(NULL
);
3296 omap_hwmod_for_each(_init
, NULL
);
3297 omap_hwmod_for_each(_setup
, NULL
);
3301 omap_core_initcall(omap_hwmod_setup_all
);
3304 * omap_hwmod_enable - enable an omap_hwmod
3305 * @oh: struct omap_hwmod *
3307 * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable().
3308 * Returns -EINVAL on error or passes along the return value from _enable().
3310 int omap_hwmod_enable(struct omap_hwmod
*oh
)
3313 unsigned long flags
;
3318 spin_lock_irqsave(&oh
->_lock
, flags
);
3320 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3326 * omap_hwmod_idle - idle an omap_hwmod
3327 * @oh: struct omap_hwmod *
3329 * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle().
3330 * Returns -EINVAL on error or passes along the return value from _idle().
3332 int omap_hwmod_idle(struct omap_hwmod
*oh
)
3335 unsigned long flags
;
3340 spin_lock_irqsave(&oh
->_lock
, flags
);
3342 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3348 * omap_hwmod_shutdown - shutdown an omap_hwmod
3349 * @oh: struct omap_hwmod *
3351 * Shutdown an omap_hwmod @oh. Intended to be called by
3352 * omap_device_shutdown(). Returns -EINVAL on error or passes along
3353 * the return value from _shutdown().
3355 int omap_hwmod_shutdown(struct omap_hwmod
*oh
)
3358 unsigned long flags
;
3363 spin_lock_irqsave(&oh
->_lock
, flags
);
3365 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3371 * IP block data retrieval functions
3375 * omap_hwmod_count_resources - count number of struct resources needed by hwmod
3376 * @oh: struct omap_hwmod *
3377 * @flags: Type of resources to include when counting (IRQ/DMA/MEM)
3379 * Count the number of struct resource array elements necessary to
3380 * contain omap_hwmod @oh resources. Intended to be called by code
3381 * that registers omap_devices. Intended to be used to determine the
3382 * size of a dynamically-allocated struct resource array, before
3383 * calling omap_hwmod_fill_resources(). Returns the number of struct
3384 * resource array elements needed.
3386 * XXX This code is not optimized. It could attempt to merge adjacent
3390 int omap_hwmod_count_resources(struct omap_hwmod
*oh
, unsigned long flags
)
3394 if (flags
& IORESOURCE_IRQ
)
3395 ret
+= _count_mpu_irqs(oh
);
3397 if (flags
& IORESOURCE_DMA
)
3398 ret
+= _count_sdma_reqs(oh
);
3400 if (flags
& IORESOURCE_MEM
) {
3402 struct omap_hwmod_ocp_if
*os
;
3403 struct list_head
*p
= oh
->slave_ports
.next
;
3405 while (i
< oh
->slaves_cnt
) {
3406 os
= _fetch_next_ocp_if(&p
, &i
);
3407 ret
+= _count_ocp_if_addr_spaces(os
);
3415 * omap_hwmod_fill_resources - fill struct resource array with hwmod data
3416 * @oh: struct omap_hwmod *
3417 * @res: pointer to the first element of an array of struct resource to fill
3419 * Fill the struct resource array @res with resource data from the
3420 * omap_hwmod @oh. Intended to be called by code that registers
3421 * omap_devices. See also omap_hwmod_count_resources(). Returns the
3422 * number of array elements filled.
3424 int omap_hwmod_fill_resources(struct omap_hwmod
*oh
, struct resource
*res
)
3426 struct omap_hwmod_ocp_if
*os
;
3427 struct list_head
*p
;
3428 int i
, j
, mpu_irqs_cnt
, sdma_reqs_cnt
, addr_cnt
;
3431 /* For each IRQ, DMA, memory area, fill in array.*/
3433 mpu_irqs_cnt
= _count_mpu_irqs(oh
);
3434 for (i
= 0; i
< mpu_irqs_cnt
; i
++) {
3438 irq
= oh
->xlate_irq((oh
->mpu_irqs
+ i
)->irq
);
3440 irq
= (oh
->mpu_irqs
+ i
)->irq
;
3441 (res
+ r
)->name
= (oh
->mpu_irqs
+ i
)->name
;
3442 (res
+ r
)->start
= irq
;
3443 (res
+ r
)->end
= irq
;
3444 (res
+ r
)->flags
= IORESOURCE_IRQ
;
3448 sdma_reqs_cnt
= _count_sdma_reqs(oh
);
3449 for (i
= 0; i
< sdma_reqs_cnt
; i
++) {
3450 (res
+ r
)->name
= (oh
->sdma_reqs
+ i
)->name
;
3451 (res
+ r
)->start
= (oh
->sdma_reqs
+ i
)->dma_req
;
3452 (res
+ r
)->end
= (oh
->sdma_reqs
+ i
)->dma_req
;
3453 (res
+ r
)->flags
= IORESOURCE_DMA
;
3457 p
= oh
->slave_ports
.next
;
3460 while (i
< oh
->slaves_cnt
) {
3461 os
= _fetch_next_ocp_if(&p
, &i
);
3462 addr_cnt
= _count_ocp_if_addr_spaces(os
);
3464 for (j
= 0; j
< addr_cnt
; j
++) {
3465 (res
+ r
)->name
= (os
->addr
+ j
)->name
;
3466 (res
+ r
)->start
= (os
->addr
+ j
)->pa_start
;
3467 (res
+ r
)->end
= (os
->addr
+ j
)->pa_end
;
3468 (res
+ r
)->flags
= IORESOURCE_MEM
;
3477 * omap_hwmod_fill_dma_resources - fill struct resource array with dma data
3478 * @oh: struct omap_hwmod *
3479 * @res: pointer to the array of struct resource to fill
3481 * Fill the struct resource array @res with dma resource data from the
3482 * omap_hwmod @oh. Intended to be called by code that registers
3483 * omap_devices. See also omap_hwmod_count_resources(). Returns the
3484 * number of array elements filled.
3486 int omap_hwmod_fill_dma_resources(struct omap_hwmod
*oh
, struct resource
*res
)
3488 int i
, sdma_reqs_cnt
;
3491 sdma_reqs_cnt
= _count_sdma_reqs(oh
);
3492 for (i
= 0; i
< sdma_reqs_cnt
; i
++) {
3493 (res
+ r
)->name
= (oh
->sdma_reqs
+ i
)->name
;
3494 (res
+ r
)->start
= (oh
->sdma_reqs
+ i
)->dma_req
;
3495 (res
+ r
)->end
= (oh
->sdma_reqs
+ i
)->dma_req
;
3496 (res
+ r
)->flags
= IORESOURCE_DMA
;
3504 * omap_hwmod_get_resource_byname - fetch IP block integration data by name
3505 * @oh: struct omap_hwmod * to operate on
3506 * @type: one of the IORESOURCE_* constants from include/linux/ioport.h
3507 * @name: pointer to the name of the data to fetch (optional)
3508 * @rsrc: pointer to a struct resource, allocated by the caller
3510 * Retrieve MPU IRQ, SDMA request line, or address space start/end
3511 * data for the IP block pointed to by @oh. The data will be filled
3512 * into a struct resource record pointed to by @rsrc. The struct
3513 * resource must be allocated by the caller. When @name is non-null,
3514 * the data associated with the matching entry in the IRQ/SDMA/address
3515 * space hwmod data arrays will be returned. If @name is null, the
3516 * first array entry will be returned. Data order is not meaningful
3517 * in hwmod data, so callers are strongly encouraged to use a non-null
3518 * @name whenever possible to avoid unpredictable effects if hwmod
3519 * data is later added that causes data ordering to change. This
3520 * function is only intended for use by OMAP core code. Device
3521 * drivers should not call this function - the appropriate bus-related
3522 * data accessor functions should be used instead. Returns 0 upon
3523 * success or a negative error code upon error.
3525 int omap_hwmod_get_resource_byname(struct omap_hwmod
*oh
, unsigned int type
,
3526 const char *name
, struct resource
*rsrc
)
3529 unsigned int irq
, dma
;
3530 u32 pa_start
, pa_end
;
3535 if (type
== IORESOURCE_IRQ
) {
3536 r
= _get_mpu_irq_by_name(oh
, name
, &irq
);
3542 } else if (type
== IORESOURCE_DMA
) {
3543 r
= _get_sdma_req_by_name(oh
, name
, &dma
);
3549 } else if (type
== IORESOURCE_MEM
) {
3550 r
= _get_addr_space_by_name(oh
, name
, &pa_start
, &pa_end
);
3554 rsrc
->start
= pa_start
;
3567 * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain
3568 * @oh: struct omap_hwmod *
3570 * Return the powerdomain pointer associated with the OMAP module
3571 * @oh's main clock. If @oh does not have a main clk, return the
3572 * powerdomain associated with the interface clock associated with the
3573 * module's MPU port. (XXX Perhaps this should use the SDMA port
3574 * instead?) Returns NULL on error, or a struct powerdomain * on
3577 struct powerdomain
*omap_hwmod_get_pwrdm(struct omap_hwmod
*oh
)
3580 struct omap_hwmod_ocp_if
*oi
;
3581 struct clockdomain
*clkdm
;
3582 struct clk_hw_omap
*clk
;
3588 return oh
->clkdm
->pwrdm
.ptr
;
3593 oi
= _find_mpu_rt_port(oh
);
3599 clk
= to_clk_hw_omap(__clk_get_hw(c
));
3604 return clkdm
->pwrdm
.ptr
;
3608 * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU)
3609 * @oh: struct omap_hwmod *
3611 * Returns the virtual address corresponding to the beginning of the
3612 * module's register target, in the address range that is intended to
3613 * be used by the MPU. Returns the virtual address upon success or NULL
3616 void __iomem
*omap_hwmod_get_mpu_rt_va(struct omap_hwmod
*oh
)
3621 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
3624 if (oh
->_state
== _HWMOD_STATE_UNKNOWN
)
3627 return oh
->_mpu_rt_va
;
3631 * XXX what about functions for drivers to save/restore ocp_sysconfig
3632 * for context save/restore operations?
3636 * omap_hwmod_enable_wakeup - allow device to wake up the system
3637 * @oh: struct omap_hwmod *
3639 * Sets the module OCP socket ENAWAKEUP bit to allow the module to
3640 * send wakeups to the PRCM, and enable I/O ring wakeup events for
3641 * this IP block if it has dynamic mux entries. Eventually this
3642 * should set PRCM wakeup registers to cause the PRCM to receive
3643 * wakeup events from the module. Does not set any wakeup routing
3644 * registers beyond this point - if the module is to wake up any other
3645 * module or subsystem, that must be set separately. Called by
3646 * omap_device code. Returns -EINVAL on error or 0 upon success.
3648 int omap_hwmod_enable_wakeup(struct omap_hwmod
*oh
)
3650 unsigned long flags
;
3653 spin_lock_irqsave(&oh
->_lock
, flags
);
3655 if (oh
->class->sysc
&&
3656 (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)) {
3657 v
= oh
->_sysc_cache
;
3658 _enable_wakeup(oh
, &v
);
3659 _write_sysconfig(v
, oh
);
3662 _set_idle_ioring_wakeup(oh
, true);
3663 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3669 * omap_hwmod_disable_wakeup - prevent device from waking the system
3670 * @oh: struct omap_hwmod *
3672 * Clears the module OCP socket ENAWAKEUP bit to prevent the module
3673 * from sending wakeups to the PRCM, and disable I/O ring wakeup
3674 * events for this IP block if it has dynamic mux entries. Eventually
3675 * this should clear PRCM wakeup registers to cause the PRCM to ignore
3676 * wakeup events from the module. Does not set any wakeup routing
3677 * registers beyond this point - if the module is to wake up any other
3678 * module or subsystem, that must be set separately. Called by
3679 * omap_device code. Returns -EINVAL on error or 0 upon success.
3681 int omap_hwmod_disable_wakeup(struct omap_hwmod
*oh
)
3683 unsigned long flags
;
3686 spin_lock_irqsave(&oh
->_lock
, flags
);
3688 if (oh
->class->sysc
&&
3689 (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)) {
3690 v
= oh
->_sysc_cache
;
3691 _disable_wakeup(oh
, &v
);
3692 _write_sysconfig(v
, oh
);
3695 _set_idle_ioring_wakeup(oh
, false);
3696 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3702 * omap_hwmod_assert_hardreset - assert the HW reset line of submodules
3703 * contained in the hwmod module.
3704 * @oh: struct omap_hwmod *
3705 * @name: name of the reset line to lookup and assert
3707 * Some IP like dsp, ipu or iva contain processor that require
3708 * an HW reset line to be assert / deassert in order to enable fully
3709 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3710 * yet supported on this OMAP; otherwise, passes along the return value
3711 * from _assert_hardreset().
3713 int omap_hwmod_assert_hardreset(struct omap_hwmod
*oh
, const char *name
)
3716 unsigned long flags
;
3721 spin_lock_irqsave(&oh
->_lock
, flags
);
3722 ret
= _assert_hardreset(oh
, name
);
3723 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3729 * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules
3730 * contained in the hwmod module.
3731 * @oh: struct omap_hwmod *
3732 * @name: name of the reset line to look up and deassert
3734 * Some IP like dsp, ipu or iva contain processor that require
3735 * an HW reset line to be assert / deassert in order to enable fully
3736 * the IP. Returns -EINVAL if @oh is null or if the operation is not
3737 * yet supported on this OMAP; otherwise, passes along the return value
3738 * from _deassert_hardreset().
3740 int omap_hwmod_deassert_hardreset(struct omap_hwmod
*oh
, const char *name
)
3743 unsigned long flags
;
3748 spin_lock_irqsave(&oh
->_lock
, flags
);
3749 ret
= _deassert_hardreset(oh
, name
);
3750 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3756 * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname
3757 * @classname: struct omap_hwmod_class name to search for
3758 * @fn: callback function pointer to call for each hwmod in class @classname
3759 * @user: arbitrary context data to pass to the callback function
3761 * For each omap_hwmod of class @classname, call @fn.
3762 * If the callback function returns something other than
3763 * zero, the iterator is terminated, and the callback function's return
3764 * value is passed back to the caller. Returns 0 upon success, -EINVAL
3765 * if @classname or @fn are NULL, or passes back the error code from @fn.
3767 int omap_hwmod_for_each_by_class(const char *classname
,
3768 int (*fn
)(struct omap_hwmod
*oh
,
3772 struct omap_hwmod
*temp_oh
;
3775 if (!classname
|| !fn
)
3778 pr_debug("omap_hwmod: %s: looking for modules of class %s\n",
3779 __func__
, classname
);
3781 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
3782 if (!strcmp(temp_oh
->class->name
, classname
)) {
3783 pr_debug("omap_hwmod: %s: %s: calling callback fn\n",
3784 __func__
, temp_oh
->name
);
3785 ret
= (*fn
)(temp_oh
, user
);
3792 pr_debug("omap_hwmod: %s: iterator terminated early: %d\n",
3799 * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod
3800 * @oh: struct omap_hwmod *
3801 * @state: state that _setup() should leave the hwmod in
3803 * Sets the hwmod state that @oh will enter at the end of _setup()
3804 * (called by omap_hwmod_setup_*()). See also the documentation
3805 * for _setup_postsetup(), above. Returns 0 upon success or
3806 * -EINVAL if there is a problem with the arguments or if the hwmod is
3807 * in the wrong state.
3809 int omap_hwmod_set_postsetup_state(struct omap_hwmod
*oh
, u8 state
)
3812 unsigned long flags
;
3817 if (state
!= _HWMOD_STATE_DISABLED
&&
3818 state
!= _HWMOD_STATE_ENABLED
&&
3819 state
!= _HWMOD_STATE_IDLE
)
3822 spin_lock_irqsave(&oh
->_lock
, flags
);
3824 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
) {
3829 oh
->_postsetup_state
= state
;
3833 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3839 * omap_hwmod_get_context_loss_count - get lost context count
3840 * @oh: struct omap_hwmod *
3842 * Returns the context loss count of associated @oh
3843 * upon success, or zero if no context loss data is available.
3845 * On OMAP4, this queries the per-hwmod context loss register,
3846 * assuming one exists. If not, or on OMAP2/3, this queries the
3847 * enclosing powerdomain context loss count.
3849 int omap_hwmod_get_context_loss_count(struct omap_hwmod
*oh
)
3851 struct powerdomain
*pwrdm
;
3854 if (soc_ops
.get_context_lost
)
3855 return soc_ops
.get_context_lost(oh
);
3857 pwrdm
= omap_hwmod_get_pwrdm(oh
);
3859 ret
= pwrdm_get_context_loss_count(pwrdm
);
3865 * omap_hwmod_init - initialize the hwmod code
3867 * Sets up some function pointers needed by the hwmod code to operate on the
3868 * currently-booted SoC. Intended to be called once during kernel init
3869 * before any hwmods are registered. No return value.
3871 void __init
omap_hwmod_init(void)
3873 if (cpu_is_omap24xx()) {
3874 soc_ops
.wait_target_ready
= _omap2xxx_3xxx_wait_target_ready
;
3875 soc_ops
.assert_hardreset
= _omap2_assert_hardreset
;
3876 soc_ops
.deassert_hardreset
= _omap2_deassert_hardreset
;
3877 soc_ops
.is_hardreset_asserted
= _omap2_is_hardreset_asserted
;
3878 } else if (cpu_is_omap34xx()) {
3879 soc_ops
.wait_target_ready
= _omap2xxx_3xxx_wait_target_ready
;
3880 soc_ops
.assert_hardreset
= _omap2_assert_hardreset
;
3881 soc_ops
.deassert_hardreset
= _omap2_deassert_hardreset
;
3882 soc_ops
.is_hardreset_asserted
= _omap2_is_hardreset_asserted
;
3883 soc_ops
.init_clkdm
= _init_clkdm
;
3884 } else if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) {
3885 soc_ops
.enable_module
= _omap4_enable_module
;
3886 soc_ops
.disable_module
= _omap4_disable_module
;
3887 soc_ops
.wait_target_ready
= _omap4_wait_target_ready
;
3888 soc_ops
.assert_hardreset
= _omap4_assert_hardreset
;
3889 soc_ops
.deassert_hardreset
= _omap4_deassert_hardreset
;
3890 soc_ops
.is_hardreset_asserted
= _omap4_is_hardreset_asserted
;
3891 soc_ops
.init_clkdm
= _init_clkdm
;
3892 soc_ops
.update_context_lost
= _omap4_update_context_lost
;
3893 soc_ops
.get_context_lost
= _omap4_get_context_lost
;
3894 } else if (cpu_is_ti814x() || cpu_is_ti816x() || soc_is_am33xx() ||
3896 soc_ops
.enable_module
= _omap4_enable_module
;
3897 soc_ops
.disable_module
= _omap4_disable_module
;
3898 soc_ops
.wait_target_ready
= _omap4_wait_target_ready
;
3899 soc_ops
.assert_hardreset
= _omap4_assert_hardreset
;
3900 soc_ops
.deassert_hardreset
= _am33xx_deassert_hardreset
;
3901 soc_ops
.is_hardreset_asserted
= _omap4_is_hardreset_asserted
;
3902 soc_ops
.init_clkdm
= _init_clkdm
;
3904 WARN(1, "omap_hwmod: unknown SoC type\n");
3911 * omap_hwmod_get_main_clk - get pointer to main clock name
3912 * @oh: struct omap_hwmod *
3914 * Returns the main clock name assocated with @oh upon success,
3915 * or NULL if @oh is NULL.
3917 const char *omap_hwmod_get_main_clk(struct omap_hwmod
*oh
)
3922 return oh
->main_clk
;