2 * omap_hwmod implementation for OMAP2/3/4
4 * Copyright (C) 2009-2011 Nokia Corporation
5 * Copyright (C) 2011-2012 Texas Instruments, Inc.
7 * Paul Walmsley, BenoƮt Cousson, Kevin Hilman
9 * Created in collaboration with (alphabetical order): Thara Gopinath,
10 * Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari Poussa, Anand
11 * Sawant, Santosh Shilimkar, Richard Woodruff
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
19 * One way to view an OMAP SoC is as a collection of largely unrelated
20 * IP blocks connected by interconnects. The IP blocks include
21 * devices such as ARM processors, audio serial interfaces, UARTs,
22 * etc. Some of these devices, like the DSP, are created by TI;
23 * others, like the SGX, largely originate from external vendors. In
24 * TI's documentation, on-chip devices are referred to as "OMAP
25 * modules." Some of these IP blocks are identical across several
26 * OMAP versions. Others are revised frequently.
28 * These OMAP modules are tied together by various interconnects.
29 * Most of the address and data flow between modules is via OCP-based
30 * interconnects such as the L3 and L4 buses; but there are other
31 * interconnects that distribute the hardware clock tree, handle idle
32 * and reset signaling, supply power, and connect the modules to
33 * various pads or balls on the OMAP package.
35 * OMAP hwmod provides a consistent way to describe the on-chip
36 * hardware blocks and their integration into the rest of the chip.
37 * This description can be automatically generated from the TI
38 * hardware database. OMAP hwmod provides a standard, consistent API
39 * to reset, enable, idle, and disable these hardware blocks. And
40 * hwmod provides a way for other core code, such as the Linux device
41 * code or the OMAP power management and address space mapping code,
42 * to query the hardware database.
46 * Drivers won't call hwmod functions directly. That is done by the
47 * omap_device code, and in rare occasions, by custom integration code
48 * in arch/arm/ *omap*. The omap_device code includes functions to
49 * build a struct platform_device using omap_hwmod data, and that is
50 * currently how hwmod data is communicated to drivers and to the
51 * Linux driver model. Most drivers will call omap_hwmod functions only
52 * indirectly, via pm_runtime*() functions.
54 * From a layering perspective, here is where the OMAP hwmod code
55 * fits into the kernel software stack:
57 * +-------------------------------+
58 * | Device driver code |
59 * | (e.g., drivers/) |
60 * +-------------------------------+
61 * | Linux driver model |
62 * | (platform_device / |
63 * | platform_driver data/code) |
64 * +-------------------------------+
65 * | OMAP core-driver integration |
66 * |(arch/arm/mach-omap2/devices.c)|
67 * +-------------------------------+
68 * | omap_device code |
69 * | (../plat-omap/omap_device.c) |
70 * +-------------------------------+
71 * ----> | omap_hwmod code/data | <-----
72 * | (../mach-omap2/omap_hwmod*) |
73 * +-------------------------------+
74 * | OMAP clock/PRCM/register fns |
75 * | (__raw_{read,write}l, clk*) |
76 * +-------------------------------+
78 * Device drivers should not contain any OMAP-specific code or data in
79 * them. They should only contain code to operate the IP block that
80 * the driver is responsible for. This is because these IP blocks can
81 * also appear in other SoCs, either from TI (such as DaVinci) or from
82 * other manufacturers; and drivers should be reusable across other
85 * The OMAP hwmod code also will attempt to reset and idle all on-chip
86 * devices upon boot. The goal here is for the kernel to be
87 * completely self-reliant and independent from bootloaders. This is
88 * to ensure a repeatable configuration, both to ensure consistent
89 * runtime behavior, and to make it easier for others to reproduce
92 * OMAP module activity states
93 * ---------------------------
94 * The hwmod code considers modules to be in one of several activity
95 * states. IP blocks start out in an UNKNOWN state, then once they
96 * are registered via the hwmod code, proceed to the REGISTERED state.
97 * Once their clock names are resolved to clock pointers, the module
98 * enters the CLKS_INITED state; and finally, once the module has been
99 * reset and the integration registers programmed, the INITIALIZED state
100 * is entered. The hwmod code will then place the module into either
101 * the IDLE state to save power, or in the case of a critical system
102 * module, the ENABLED state.
104 * OMAP core integration code can then call omap_hwmod*() functions
105 * directly to move the module between the IDLE, ENABLED, and DISABLED
106 * states, as needed. This is done during both the PM idle loop, and
107 * in the OMAP core integration code's implementation of the PM runtime
112 * This is a partial list.
113 * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
114 * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
115 * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
116 * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
117 * - Open Core Protocol Specification 2.2
120 * - handle IO mapping
121 * - bus throughput & module latency measurement code
123 * XXX add tests at the beginning of each function to ensure the hwmod is
124 * in the appropriate state
125 * XXX error return values should be checked to ensure that they are
130 #include <linux/kernel.h>
131 #include <linux/errno.h>
132 #include <linux/io.h>
133 #include <linux/clk.h>
134 #include <linux/delay.h>
135 #include <linux/err.h>
136 #include <linux/list.h>
137 #include <linux/mutex.h>
138 #include <linux/spinlock.h>
139 #include <linux/slab.h>
142 #include <plat/cpu.h>
143 #include "clockdomain.h"
144 #include "powerdomain.h"
145 #include <plat/clock.h>
146 #include <plat/omap_hwmod.h>
147 #include <plat/prcm.h>
149 #include "cm2xxx_3xxx.h"
150 #include "cminst44xx.h"
151 #include "prm2xxx_3xxx.h"
153 #include "prminst44xx.h"
156 /* Maximum microseconds to wait for OMAP module to softreset */
157 #define MAX_MODULE_SOFTRESET_WAIT 10000
159 /* Name of the OMAP hwmod for the MPU */
160 #define MPU_INITIATOR_NAME "mpu"
162 /* omap_hwmod_list contains all registered struct omap_hwmods */
163 static LIST_HEAD(omap_hwmod_list
);
165 /* mpu_oh: used to add/remove MPU initiator from sleepdep list */
166 static struct omap_hwmod
*mpu_oh
;
169 /* Private functions */
172 * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
173 * @oh: struct omap_hwmod *
175 * Load the current value of the hwmod OCP_SYSCONFIG register into the
176 * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
177 * OCP_SYSCONFIG register or 0 upon success.
179 static int _update_sysc_cache(struct omap_hwmod
*oh
)
181 if (!oh
->class->sysc
) {
182 WARN(1, "omap_hwmod: %s: cannot read OCP_SYSCONFIG: not defined on hwmod's class\n", oh
->name
);
186 /* XXX ensure module interface clock is up */
188 oh
->_sysc_cache
= omap_hwmod_read(oh
, oh
->class->sysc
->sysc_offs
);
190 if (!(oh
->class->sysc
->sysc_flags
& SYSC_NO_CACHE
))
191 oh
->_int_flags
|= _HWMOD_SYSCONFIG_LOADED
;
197 * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
198 * @v: OCP_SYSCONFIG value to write
199 * @oh: struct omap_hwmod *
201 * Write @v into the module class' OCP_SYSCONFIG register, if it has
202 * one. No return value.
204 static void _write_sysconfig(u32 v
, struct omap_hwmod
*oh
)
206 if (!oh
->class->sysc
) {
207 WARN(1, "omap_hwmod: %s: cannot write OCP_SYSCONFIG: not defined on hwmod's class\n", oh
->name
);
211 /* XXX ensure module interface clock is up */
213 /* Module might have lost context, always update cache and register */
215 omap_hwmod_write(v
, oh
, oh
->class->sysc
->sysc_offs
);
219 * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
220 * @oh: struct omap_hwmod *
221 * @standbymode: MIDLEMODE field bits
222 * @v: pointer to register contents to modify
224 * Update the master standby mode bits in @v to be @standbymode for
225 * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
226 * upon error or 0 upon success.
228 static int _set_master_standbymode(struct omap_hwmod
*oh
, u8 standbymode
,
234 if (!oh
->class->sysc
||
235 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_MIDLEMODE
))
238 if (!oh
->class->sysc
->sysc_fields
) {
239 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
243 mstandby_shift
= oh
->class->sysc
->sysc_fields
->midle_shift
;
244 mstandby_mask
= (0x3 << mstandby_shift
);
246 *v
&= ~mstandby_mask
;
247 *v
|= __ffs(standbymode
) << mstandby_shift
;
253 * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
254 * @oh: struct omap_hwmod *
255 * @idlemode: SIDLEMODE field bits
256 * @v: pointer to register contents to modify
258 * Update the slave idle mode bits in @v to be @idlemode for the @oh
259 * hwmod. Does not write to the hardware. Returns -EINVAL upon error
262 static int _set_slave_idlemode(struct omap_hwmod
*oh
, u8 idlemode
, u32
*v
)
267 if (!oh
->class->sysc
||
268 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SIDLEMODE
))
271 if (!oh
->class->sysc
->sysc_fields
) {
272 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
276 sidle_shift
= oh
->class->sysc
->sysc_fields
->sidle_shift
;
277 sidle_mask
= (0x3 << sidle_shift
);
280 *v
|= __ffs(idlemode
) << sidle_shift
;
286 * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
287 * @oh: struct omap_hwmod *
288 * @clockact: CLOCKACTIVITY field bits
289 * @v: pointer to register contents to modify
291 * Update the clockactivity mode bits in @v to be @clockact for the
292 * @oh hwmod. Used for additional powersaving on some modules. Does
293 * not write to the hardware. Returns -EINVAL upon error or 0 upon
296 static int _set_clockactivity(struct omap_hwmod
*oh
, u8 clockact
, u32
*v
)
301 if (!oh
->class->sysc
||
302 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_CLOCKACTIVITY
))
305 if (!oh
->class->sysc
->sysc_fields
) {
306 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
310 clkact_shift
= oh
->class->sysc
->sysc_fields
->clkact_shift
;
311 clkact_mask
= (0x3 << clkact_shift
);
314 *v
|= clockact
<< clkact_shift
;
320 * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
321 * @oh: struct omap_hwmod *
322 * @v: pointer to register contents to modify
324 * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
325 * error or 0 upon success.
327 static int _set_softreset(struct omap_hwmod
*oh
, u32
*v
)
331 if (!oh
->class->sysc
||
332 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SOFTRESET
))
335 if (!oh
->class->sysc
->sysc_fields
) {
336 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
340 softrst_mask
= (0x1 << oh
->class->sysc
->sysc_fields
->srst_shift
);
348 * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v
349 * @oh: struct omap_hwmod *
350 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
351 * @v: pointer to register contents to modify
353 * Update the module autoidle bit in @v to be @autoidle for the @oh
354 * hwmod. The autoidle bit controls whether the module can gate
355 * internal clocks automatically when it isn't doing anything; the
356 * exact function of this bit varies on a per-module basis. This
357 * function does not write to the hardware. Returns -EINVAL upon
358 * error or 0 upon success.
360 static int _set_module_autoidle(struct omap_hwmod
*oh
, u8 autoidle
,
366 if (!oh
->class->sysc
||
367 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_AUTOIDLE
))
370 if (!oh
->class->sysc
->sysc_fields
) {
371 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
375 autoidle_shift
= oh
->class->sysc
->sysc_fields
->autoidle_shift
;
376 autoidle_mask
= (0x1 << autoidle_shift
);
378 *v
&= ~autoidle_mask
;
379 *v
|= autoidle
<< autoidle_shift
;
385 * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux
386 * @oh: struct omap_hwmod *
387 * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable
389 * Set or clear the I/O pad wakeup flag in the mux entries for the
390 * hwmod @oh. This function changes the @oh->mux->pads_dynamic array
391 * in memory. If the hwmod is currently idled, and the new idle
392 * values don't match the previous ones, this function will also
393 * update the SCM PADCTRL registers. Otherwise, if the hwmod is not
394 * currently idled, this function won't touch the hardware: the new
395 * mux settings are written to the SCM PADCTRL registers when the
396 * hwmod is idled. No return value.
398 static void _set_idle_ioring_wakeup(struct omap_hwmod
*oh
, bool set_wake
)
400 struct omap_device_pad
*pad
;
405 if (!oh
->mux
|| !oh
->mux
->enabled
)
408 for (j
= 0; j
< oh
->mux
->nr_pads_dynamic
; j
++) {
409 pad
= oh
->mux
->pads_dynamic
[j
];
411 if (!(pad
->flags
& OMAP_DEVICE_PAD_WAKEUP
))
414 prev_idle
= pad
->idle
;
417 pad
->idle
|= OMAP_WAKEUP_EN
;
419 pad
->idle
&= ~OMAP_WAKEUP_EN
;
421 if (prev_idle
!= pad
->idle
)
425 if (change
&& oh
->_state
== _HWMOD_STATE_IDLE
)
426 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_IDLE
);
430 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
431 * @oh: struct omap_hwmod *
433 * Allow the hardware module @oh to send wakeups. Returns -EINVAL
434 * upon error or 0 upon success.
436 static int _enable_wakeup(struct omap_hwmod
*oh
, u32
*v
)
438 if (!oh
->class->sysc
||
439 !((oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
) ||
440 (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
) ||
441 (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)))
444 if (!oh
->class->sysc
->sysc_fields
) {
445 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
449 if (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)
450 *v
|= 0x1 << oh
->class->sysc
->sysc_fields
->enwkup_shift
;
452 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
453 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_SMART_WKUP
, v
);
454 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
455 _set_master_standbymode(oh
, HWMOD_IDLEMODE_SMART_WKUP
, v
);
457 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
459 oh
->_int_flags
|= _HWMOD_WAKEUP_ENABLED
;
465 * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
466 * @oh: struct omap_hwmod *
468 * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
469 * upon error or 0 upon success.
471 static int _disable_wakeup(struct omap_hwmod
*oh
, u32
*v
)
473 if (!oh
->class->sysc
||
474 !((oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
) ||
475 (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
) ||
476 (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)))
479 if (!oh
->class->sysc
->sysc_fields
) {
480 WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh
->name
);
484 if (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)
485 *v
&= ~(0x1 << oh
->class->sysc
->sysc_fields
->enwkup_shift
);
487 if (oh
->class->sysc
->idlemodes
& SIDLE_SMART_WKUP
)
488 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_SMART
, v
);
489 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
490 _set_master_standbymode(oh
, HWMOD_IDLEMODE_SMART_WKUP
, v
);
492 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
494 oh
->_int_flags
&= ~_HWMOD_WAKEUP_ENABLED
;
500 * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
501 * @oh: struct omap_hwmod *
503 * Prevent the hardware module @oh from entering idle while the
504 * hardare module initiator @init_oh is active. Useful when a module
505 * will be accessed by a particular initiator (e.g., if a module will
506 * be accessed by the IVA, there should be a sleepdep between the IVA
507 * initiator and the module). Only applies to modules in smart-idle
508 * mode. If the clockdomain is marked as not needing autodeps, return
509 * 0 without doing anything. Otherwise, returns -EINVAL upon error or
510 * passes along clkdm_add_sleepdep() value upon success.
512 static int _add_initiator_dep(struct omap_hwmod
*oh
, struct omap_hwmod
*init_oh
)
517 if (oh
->_clk
->clkdm
&& oh
->_clk
->clkdm
->flags
& CLKDM_NO_AUTODEPS
)
520 return clkdm_add_sleepdep(oh
->_clk
->clkdm
, init_oh
->_clk
->clkdm
);
524 * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
525 * @oh: struct omap_hwmod *
527 * Allow the hardware module @oh to enter idle while the hardare
528 * module initiator @init_oh is active. Useful when a module will not
529 * be accessed by a particular initiator (e.g., if a module will not
530 * be accessed by the IVA, there should be no sleepdep between the IVA
531 * initiator and the module). Only applies to modules in smart-idle
532 * mode. If the clockdomain is marked as not needing autodeps, return
533 * 0 without doing anything. Returns -EINVAL upon error or passes
534 * along clkdm_del_sleepdep() value upon success.
536 static int _del_initiator_dep(struct omap_hwmod
*oh
, struct omap_hwmod
*init_oh
)
541 if (oh
->_clk
->clkdm
&& oh
->_clk
->clkdm
->flags
& CLKDM_NO_AUTODEPS
)
544 return clkdm_del_sleepdep(oh
->_clk
->clkdm
, init_oh
->_clk
->clkdm
);
548 * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
549 * @oh: struct omap_hwmod *
551 * Called from _init_clocks(). Populates the @oh _clk (main
552 * functional clock pointer) if a main_clk is present. Returns 0 on
553 * success or -EINVAL on error.
555 static int _init_main_clk(struct omap_hwmod
*oh
)
562 oh
->_clk
= omap_clk_get_by_name(oh
->main_clk
);
564 pr_warning("omap_hwmod: %s: cannot clk_get main_clk %s\n",
565 oh
->name
, oh
->main_clk
);
569 if (!oh
->_clk
->clkdm
)
570 pr_warning("omap_hwmod: %s: missing clockdomain for %s.\n",
571 oh
->main_clk
, oh
->_clk
->name
);
577 * _init_interface_clks - get a struct clk * for the the hwmod's interface clks
578 * @oh: struct omap_hwmod *
580 * Called from _init_clocks(). Populates the @oh OCP slave interface
581 * clock pointers. Returns 0 on success or -EINVAL on error.
583 static int _init_interface_clks(struct omap_hwmod
*oh
)
589 if (oh
->slaves_cnt
== 0)
592 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
593 struct omap_hwmod_ocp_if
*os
= oh
->slaves
[i
];
598 c
= omap_clk_get_by_name(os
->clk
);
600 pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n",
611 * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
612 * @oh: struct omap_hwmod *
614 * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
615 * clock pointers. Returns 0 on success or -EINVAL on error.
617 static int _init_opt_clks(struct omap_hwmod
*oh
)
619 struct omap_hwmod_opt_clk
*oc
;
624 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++) {
625 c
= omap_clk_get_by_name(oc
->clk
);
627 pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n",
638 * _enable_clocks - enable hwmod main clock and interface clocks
639 * @oh: struct omap_hwmod *
641 * Enables all clocks necessary for register reads and writes to succeed
642 * on the hwmod @oh. Returns 0.
644 static int _enable_clocks(struct omap_hwmod
*oh
)
648 pr_debug("omap_hwmod: %s: enabling clocks\n", oh
->name
);
651 clk_enable(oh
->_clk
);
653 if (oh
->slaves_cnt
> 0) {
654 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
655 struct omap_hwmod_ocp_if
*os
= oh
->slaves
[i
];
656 struct clk
*c
= os
->_clk
;
658 if (c
&& (os
->flags
& OCPIF_SWSUP_IDLE
))
663 /* The opt clocks are controlled by the device driver. */
669 * _disable_clocks - disable hwmod main clock and interface clocks
670 * @oh: struct omap_hwmod *
672 * Disables the hwmod @oh main functional and interface clocks. Returns 0.
674 static int _disable_clocks(struct omap_hwmod
*oh
)
678 pr_debug("omap_hwmod: %s: disabling clocks\n", oh
->name
);
681 clk_disable(oh
->_clk
);
683 if (oh
->slaves_cnt
> 0) {
684 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
685 struct omap_hwmod_ocp_if
*os
= oh
->slaves
[i
];
686 struct clk
*c
= os
->_clk
;
688 if (c
&& (os
->flags
& OCPIF_SWSUP_IDLE
))
693 /* The opt clocks are controlled by the device driver. */
698 static void _enable_optional_clocks(struct omap_hwmod
*oh
)
700 struct omap_hwmod_opt_clk
*oc
;
703 pr_debug("omap_hwmod: %s: enabling optional clocks\n", oh
->name
);
705 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++)
707 pr_debug("omap_hwmod: enable %s:%s\n", oc
->role
,
709 clk_enable(oc
->_clk
);
713 static void _disable_optional_clocks(struct omap_hwmod
*oh
)
715 struct omap_hwmod_opt_clk
*oc
;
718 pr_debug("omap_hwmod: %s: disabling optional clocks\n", oh
->name
);
720 for (i
= oh
->opt_clks_cnt
, oc
= oh
->opt_clks
; i
> 0; i
--, oc
++)
722 pr_debug("omap_hwmod: disable %s:%s\n", oc
->role
,
724 clk_disable(oc
->_clk
);
729 * _enable_module - enable CLKCTRL modulemode on OMAP4
730 * @oh: struct omap_hwmod *
732 * Enables the PRCM module mode related to the hwmod @oh.
735 static void _enable_module(struct omap_hwmod
*oh
)
737 /* The module mode does not exist prior OMAP4 */
738 if (cpu_is_omap24xx() || cpu_is_omap34xx())
741 if (!oh
->clkdm
|| !oh
->prcm
.omap4
.modulemode
)
744 pr_debug("omap_hwmod: %s: _enable_module: %d\n",
745 oh
->name
, oh
->prcm
.omap4
.modulemode
);
747 omap4_cminst_module_enable(oh
->prcm
.omap4
.modulemode
,
748 oh
->clkdm
->prcm_partition
,
750 oh
->clkdm
->clkdm_offs
,
751 oh
->prcm
.omap4
.clkctrl_offs
);
755 * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4
756 * @oh: struct omap_hwmod *
758 * Wait for a module @oh to enter slave idle. Returns 0 if the module
759 * does not have an IDLEST bit or if the module successfully enters
760 * slave idle; otherwise, pass along the return value of the
761 * appropriate *_cm*_wait_module_idle() function.
763 static int _omap4_wait_target_disable(struct omap_hwmod
*oh
)
765 if (!cpu_is_omap44xx())
771 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
774 if (oh
->flags
& HWMOD_NO_IDLEST
)
777 return omap4_cminst_wait_module_idle(oh
->clkdm
->prcm_partition
,
779 oh
->clkdm
->clkdm_offs
,
780 oh
->prcm
.omap4
.clkctrl_offs
);
784 * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh
785 * @oh: struct omap_hwmod *oh
787 * Count and return the number of MPU IRQs associated with the hwmod
788 * @oh. Used to allocate struct resource data. Returns 0 if @oh is
791 static int _count_mpu_irqs(struct omap_hwmod
*oh
)
793 struct omap_hwmod_irq_info
*ohii
;
796 if (!oh
|| !oh
->mpu_irqs
)
800 ohii
= &oh
->mpu_irqs
[i
++];
801 } while (ohii
->irq
!= -1);
807 * _count_sdma_reqs - count the number of SDMA request lines associated with @oh
808 * @oh: struct omap_hwmod *oh
810 * Count and return the number of SDMA request lines associated with
811 * the hwmod @oh. Used to allocate struct resource data. Returns 0
814 static int _count_sdma_reqs(struct omap_hwmod
*oh
)
816 struct omap_hwmod_dma_info
*ohdi
;
819 if (!oh
|| !oh
->sdma_reqs
)
823 ohdi
= &oh
->sdma_reqs
[i
++];
824 } while (ohdi
->dma_req
!= -1);
830 * _count_ocp_if_addr_spaces - count the number of address space entries for @oh
831 * @oh: struct omap_hwmod *oh
833 * Count and return the number of address space ranges associated with
834 * the hwmod @oh. Used to allocate struct resource data. Returns 0
837 static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if
*os
)
839 struct omap_hwmod_addr_space
*mem
;
842 if (!os
|| !os
->addr
)
846 mem
= &os
->addr
[i
++];
847 } while (mem
->pa_start
!= mem
->pa_end
);
853 * _get_mpu_irq_by_name - fetch MPU interrupt line number by name
854 * @oh: struct omap_hwmod * to operate on
855 * @name: pointer to the name of the MPU interrupt number to fetch (optional)
856 * @irq: pointer to an unsigned int to store the MPU IRQ number to
858 * Retrieve a MPU hardware IRQ line number named by @name associated
859 * with the IP block pointed to by @oh. The IRQ number will be filled
860 * into the address pointed to by @dma. When @name is non-null, the
861 * IRQ line number associated with the named entry will be returned.
862 * If @name is null, the first matching entry will be returned. Data
863 * order is not meaningful in hwmod data, so callers are strongly
864 * encouraged to use a non-null @name whenever possible to avoid
865 * unpredictable effects if hwmod data is later added that causes data
866 * ordering to change. Returns 0 upon success or a negative error
869 static int _get_mpu_irq_by_name(struct omap_hwmod
*oh
, const char *name
,
879 while (oh
->mpu_irqs
[i
].irq
!= -1) {
880 if (name
== oh
->mpu_irqs
[i
].name
||
881 !strcmp(name
, oh
->mpu_irqs
[i
].name
)) {
891 *irq
= oh
->mpu_irqs
[i
].irq
;
897 * _get_sdma_req_by_name - fetch SDMA request line ID by name
898 * @oh: struct omap_hwmod * to operate on
899 * @name: pointer to the name of the SDMA request line to fetch (optional)
900 * @dma: pointer to an unsigned int to store the request line ID to
902 * Retrieve an SDMA request line ID named by @name on the IP block
903 * pointed to by @oh. The ID will be filled into the address pointed
904 * to by @dma. When @name is non-null, the request line ID associated
905 * with the named entry will be returned. If @name is null, the first
906 * matching entry will be returned. Data order is not meaningful in
907 * hwmod data, so callers are strongly encouraged to use a non-null
908 * @name whenever possible to avoid unpredictable effects if hwmod
909 * data is later added that causes data ordering to change. Returns 0
910 * upon success or a negative error code upon error.
912 static int _get_sdma_req_by_name(struct omap_hwmod
*oh
, const char *name
,
922 while (oh
->sdma_reqs
[i
].dma_req
!= -1) {
923 if (name
== oh
->sdma_reqs
[i
].name
||
924 !strcmp(name
, oh
->sdma_reqs
[i
].name
)) {
934 *dma
= oh
->sdma_reqs
[i
].dma_req
;
940 * _get_addr_space_by_name - fetch address space start & end by name
941 * @oh: struct omap_hwmod * to operate on
942 * @name: pointer to the name of the address space to fetch (optional)
943 * @pa_start: pointer to a u32 to store the starting address to
944 * @pa_end: pointer to a u32 to store the ending address to
946 * Retrieve address space start and end addresses for the IP block
947 * pointed to by @oh. The data will be filled into the addresses
948 * pointed to by @pa_start and @pa_end. When @name is non-null, the
949 * address space data associated with the named entry will be
950 * returned. If @name is null, the first matching entry will be
951 * returned. Data order is not meaningful in hwmod data, so callers
952 * are strongly encouraged to use a non-null @name whenever possible
953 * to avoid unpredictable effects if hwmod data is later added that
954 * causes data ordering to change. Returns 0 upon success or a
955 * negative error code upon error.
957 static int _get_addr_space_by_name(struct omap_hwmod
*oh
, const char *name
,
958 u32
*pa_start
, u32
*pa_end
)
961 struct omap_hwmod_ocp_if
*os
;
964 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
971 while (os
->addr
[j
].pa_start
!= os
->addr
[j
].pa_end
) {
972 if (name
== os
->addr
[j
].name
||
973 !strcmp(name
, os
->addr
[j
].name
)) {
987 *pa_start
= os
->addr
[j
].pa_start
;
988 *pa_end
= os
->addr
[j
].pa_end
;
994 * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use
995 * @oh: struct omap_hwmod *
997 * Returns the array index of the OCP slave port that the MPU
998 * addresses the device on, or -EINVAL upon error or not found.
1000 static int __init
_find_mpu_port_index(struct omap_hwmod
*oh
)
1005 if (!oh
|| oh
->slaves_cnt
== 0)
1008 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
1009 struct omap_hwmod_ocp_if
*os
= oh
->slaves
[i
];
1011 if (os
->user
& OCP_USER_MPU
) {
1018 pr_debug("omap_hwmod: %s: MPU OCP slave port ID %d\n",
1021 pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n",
1024 return (found
) ? i
: -EINVAL
;
1028 * _find_mpu_rt_addr_space - return MPU register target address space for @oh
1029 * @oh: struct omap_hwmod *
1031 * Returns a pointer to the struct omap_hwmod_addr_space record representing
1032 * the register target MPU address space; or returns NULL upon error.
1034 static struct omap_hwmod_addr_space
* __init
_find_mpu_rt_addr_space(struct omap_hwmod
*oh
)
1036 struct omap_hwmod_ocp_if
*os
;
1037 struct omap_hwmod_addr_space
*mem
;
1038 int found
= 0, i
= 0;
1040 if (!oh
|| oh
->_int_flags
& _HWMOD_NO_MPU_PORT
|| oh
->slaves_cnt
== 0)
1043 os
= oh
->slaves
[oh
->_mpu_port_index
];
1048 mem
= &os
->addr
[i
++];
1049 if (mem
->flags
& ADDR_TYPE_RT
)
1051 } while (!found
&& mem
->pa_start
!= mem
->pa_end
);
1053 return (found
) ? mem
: NULL
;
1057 * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG
1058 * @oh: struct omap_hwmod *
1060 * If module is marked as SWSUP_SIDLE, force the module out of slave
1061 * idle; otherwise, configure it for smart-idle. If module is marked
1062 * as SWSUP_MSUSPEND, force the module out of master standby;
1063 * otherwise, configure it for smart-standby. No return value.
1065 static void _enable_sysc(struct omap_hwmod
*oh
)
1070 if (!oh
->class->sysc
)
1073 v
= oh
->_sysc_cache
;
1074 sf
= oh
->class->sysc
->sysc_flags
;
1076 if (sf
& SYSC_HAS_SIDLEMODE
) {
1077 idlemode
= (oh
->flags
& HWMOD_SWSUP_SIDLE
) ?
1078 HWMOD_IDLEMODE_NO
: HWMOD_IDLEMODE_SMART
;
1079 _set_slave_idlemode(oh
, idlemode
, &v
);
1082 if (sf
& SYSC_HAS_MIDLEMODE
) {
1083 if (oh
->flags
& HWMOD_SWSUP_MSTANDBY
) {
1084 idlemode
= HWMOD_IDLEMODE_NO
;
1086 if (sf
& SYSC_HAS_ENAWAKEUP
)
1087 _enable_wakeup(oh
, &v
);
1088 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
1089 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1091 idlemode
= HWMOD_IDLEMODE_SMART
;
1093 _set_master_standbymode(oh
, idlemode
, &v
);
1097 * XXX The clock framework should handle this, by
1098 * calling into this code. But this must wait until the
1099 * clock structures are tagged with omap_hwmod entries
1101 if ((oh
->flags
& HWMOD_SET_DEFAULT_CLOCKACT
) &&
1102 (sf
& SYSC_HAS_CLOCKACTIVITY
))
1103 _set_clockactivity(oh
, oh
->class->sysc
->clockact
, &v
);
1105 /* If slave is in SMARTIDLE, also enable wakeup */
1106 if ((sf
& SYSC_HAS_SIDLEMODE
) && !(oh
->flags
& HWMOD_SWSUP_SIDLE
))
1107 _enable_wakeup(oh
, &v
);
1109 _write_sysconfig(v
, oh
);
1112 * Set the autoidle bit only after setting the smartidle bit
1113 * Setting this will not have any impact on the other modules.
1115 if (sf
& SYSC_HAS_AUTOIDLE
) {
1116 idlemode
= (oh
->flags
& HWMOD_NO_OCP_AUTOIDLE
) ?
1118 _set_module_autoidle(oh
, idlemode
, &v
);
1119 _write_sysconfig(v
, oh
);
1124 * _idle_sysc - try to put a module into idle via OCP_SYSCONFIG
1125 * @oh: struct omap_hwmod *
1127 * If module is marked as SWSUP_SIDLE, force the module into slave
1128 * idle; otherwise, configure it for smart-idle. If module is marked
1129 * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
1130 * configure it for smart-standby. No return value.
1132 static void _idle_sysc(struct omap_hwmod
*oh
)
1137 if (!oh
->class->sysc
)
1140 v
= oh
->_sysc_cache
;
1141 sf
= oh
->class->sysc
->sysc_flags
;
1143 if (sf
& SYSC_HAS_SIDLEMODE
) {
1144 idlemode
= (oh
->flags
& HWMOD_SWSUP_SIDLE
) ?
1145 HWMOD_IDLEMODE_FORCE
: HWMOD_IDLEMODE_SMART
;
1146 _set_slave_idlemode(oh
, idlemode
, &v
);
1149 if (sf
& SYSC_HAS_MIDLEMODE
) {
1150 if (oh
->flags
& HWMOD_SWSUP_MSTANDBY
) {
1151 idlemode
= HWMOD_IDLEMODE_FORCE
;
1153 if (sf
& SYSC_HAS_ENAWAKEUP
)
1154 _enable_wakeup(oh
, &v
);
1155 if (oh
->class->sysc
->idlemodes
& MSTANDBY_SMART_WKUP
)
1156 idlemode
= HWMOD_IDLEMODE_SMART_WKUP
;
1158 idlemode
= HWMOD_IDLEMODE_SMART
;
1160 _set_master_standbymode(oh
, idlemode
, &v
);
1163 /* If slave is in SMARTIDLE, also enable wakeup */
1164 if ((sf
& SYSC_HAS_SIDLEMODE
) && !(oh
->flags
& HWMOD_SWSUP_SIDLE
))
1165 _enable_wakeup(oh
, &v
);
1167 _write_sysconfig(v
, oh
);
1171 * _shutdown_sysc - force a module into idle via OCP_SYSCONFIG
1172 * @oh: struct omap_hwmod *
1174 * Force the module into slave idle and master suspend. No return
1177 static void _shutdown_sysc(struct omap_hwmod
*oh
)
1182 if (!oh
->class->sysc
)
1185 v
= oh
->_sysc_cache
;
1186 sf
= oh
->class->sysc
->sysc_flags
;
1188 if (sf
& SYSC_HAS_SIDLEMODE
)
1189 _set_slave_idlemode(oh
, HWMOD_IDLEMODE_FORCE
, &v
);
1191 if (sf
& SYSC_HAS_MIDLEMODE
)
1192 _set_master_standbymode(oh
, HWMOD_IDLEMODE_FORCE
, &v
);
1194 if (sf
& SYSC_HAS_AUTOIDLE
)
1195 _set_module_autoidle(oh
, 1, &v
);
1197 _write_sysconfig(v
, oh
);
1201 * _lookup - find an omap_hwmod by name
1202 * @name: find an omap_hwmod by name
1204 * Return a pointer to an omap_hwmod by name, or NULL if not found.
1206 static struct omap_hwmod
*_lookup(const char *name
)
1208 struct omap_hwmod
*oh
, *temp_oh
;
1212 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
1213 if (!strcmp(name
, temp_oh
->name
)) {
1222 * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
1223 * @oh: struct omap_hwmod *
1225 * Convert a clockdomain name stored in a struct omap_hwmod into a
1226 * clockdomain pointer, and save it into the struct omap_hwmod.
1227 * return -EINVAL if clkdm_name does not exist or if the lookup failed.
1229 static int _init_clkdm(struct omap_hwmod
*oh
)
1231 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1234 if (!oh
->clkdm_name
) {
1235 pr_warning("omap_hwmod: %s: no clkdm_name\n", oh
->name
);
1239 oh
->clkdm
= clkdm_lookup(oh
->clkdm_name
);
1241 pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n",
1242 oh
->name
, oh
->clkdm_name
);
1246 pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
1247 oh
->name
, oh
->clkdm_name
);
1253 * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
1254 * well the clockdomain.
1255 * @oh: struct omap_hwmod *
1256 * @data: not used; pass NULL
1258 * Called by omap_hwmod_setup_*() (after omap2_clk_init()).
1259 * Resolves all clock names embedded in the hwmod. Returns 0 on
1260 * success, or a negative error code on failure.
1262 static int _init_clocks(struct omap_hwmod
*oh
, void *data
)
1266 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
)
1269 pr_debug("omap_hwmod: %s: looking up clocks\n", oh
->name
);
1271 ret
|= _init_main_clk(oh
);
1272 ret
|= _init_interface_clks(oh
);
1273 ret
|= _init_opt_clks(oh
);
1274 ret
|= _init_clkdm(oh
);
1277 oh
->_state
= _HWMOD_STATE_CLKS_INITED
;
1279 pr_warning("omap_hwmod: %s: cannot _init_clocks\n", oh
->name
);
1285 * _wait_target_ready - wait for a module to leave slave idle
1286 * @oh: struct omap_hwmod *
1288 * Wait for a module @oh to leave slave idle. Returns 0 if the module
1289 * does not have an IDLEST bit or if the module successfully leaves
1290 * slave idle; otherwise, pass along the return value of the
1291 * appropriate *_cm*_wait_module_ready() function.
1293 static int _wait_target_ready(struct omap_hwmod
*oh
)
1295 struct omap_hwmod_ocp_if
*os
;
1301 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
1304 os
= oh
->slaves
[oh
->_mpu_port_index
];
1306 if (oh
->flags
& HWMOD_NO_IDLEST
)
1309 /* XXX check module SIDLEMODE */
1311 /* XXX check clock enable states */
1313 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1314 ret
= omap2_cm_wait_module_ready(oh
->prcm
.omap2
.module_offs
,
1315 oh
->prcm
.omap2
.idlest_reg_id
,
1316 oh
->prcm
.omap2
.idlest_idle_bit
);
1317 } else if (cpu_is_omap44xx()) {
1321 ret
= omap4_cminst_wait_module_ready(oh
->clkdm
->prcm_partition
,
1323 oh
->clkdm
->clkdm_offs
,
1324 oh
->prcm
.omap4
.clkctrl_offs
);
1333 * _lookup_hardreset - fill register bit info for this hwmod/reset line
1334 * @oh: struct omap_hwmod *
1335 * @name: name of the reset line in the context of this hwmod
1336 * @ohri: struct omap_hwmod_rst_info * that this function will fill in
1338 * Return the bit position of the reset line that match the
1339 * input name. Return -ENOENT if not found.
1341 static u8
_lookup_hardreset(struct omap_hwmod
*oh
, const char *name
,
1342 struct omap_hwmod_rst_info
*ohri
)
1346 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++) {
1347 const char *rst_line
= oh
->rst_lines
[i
].name
;
1348 if (!strcmp(rst_line
, name
)) {
1349 ohri
->rst_shift
= oh
->rst_lines
[i
].rst_shift
;
1350 ohri
->st_shift
= oh
->rst_lines
[i
].st_shift
;
1351 pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n",
1352 oh
->name
, __func__
, rst_line
, ohri
->rst_shift
,
1363 * _assert_hardreset - assert the HW reset line of submodules
1364 * contained in the hwmod module.
1365 * @oh: struct omap_hwmod *
1366 * @name: name of the reset line to lookup and assert
1368 * Some IP like dsp, ipu or iva contain processor that require
1369 * an HW reset line to be assert / deassert in order to enable fully
1372 static int _assert_hardreset(struct omap_hwmod
*oh
, const char *name
)
1374 struct omap_hwmod_rst_info ohri
;
1380 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1381 if (IS_ERR_VALUE(ret
))
1384 if (cpu_is_omap24xx() || cpu_is_omap34xx())
1385 return omap2_prm_assert_hardreset(oh
->prcm
.omap2
.module_offs
,
1387 else if (cpu_is_omap44xx())
1388 return omap4_prminst_assert_hardreset(ohri
.rst_shift
,
1389 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
1390 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
1391 oh
->prcm
.omap4
.rstctrl_offs
);
1397 * _deassert_hardreset - deassert the HW reset line of submodules contained
1398 * in the hwmod module.
1399 * @oh: struct omap_hwmod *
1400 * @name: name of the reset line to look up and deassert
1402 * Some IP like dsp, ipu or iva contain processor that require
1403 * an HW reset line to be assert / deassert in order to enable fully
1406 static int _deassert_hardreset(struct omap_hwmod
*oh
, const char *name
)
1408 struct omap_hwmod_rst_info ohri
;
1414 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1415 if (IS_ERR_VALUE(ret
))
1418 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1419 ret
= omap2_prm_deassert_hardreset(oh
->prcm
.omap2
.module_offs
,
1422 } else if (cpu_is_omap44xx()) {
1424 pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
1426 ret
= omap4_prminst_deassert_hardreset(ohri
.rst_shift
,
1427 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
1428 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
1429 oh
->prcm
.omap4
.rstctrl_offs
);
1435 pr_warning("omap_hwmod: %s: failed to hardreset\n", oh
->name
);
1441 * _read_hardreset - read the HW reset line state of submodules
1442 * contained in the hwmod module
1443 * @oh: struct omap_hwmod *
1444 * @name: name of the reset line to look up and read
1446 * Return the state of the reset line.
1448 static int _read_hardreset(struct omap_hwmod
*oh
, const char *name
)
1450 struct omap_hwmod_rst_info ohri
;
1456 ret
= _lookup_hardreset(oh
, name
, &ohri
);
1457 if (IS_ERR_VALUE(ret
))
1460 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
1461 return omap2_prm_is_hardreset_asserted(oh
->prcm
.omap2
.module_offs
,
1463 } else if (cpu_is_omap44xx()) {
1464 return omap4_prminst_is_hardreset_asserted(ohri
.rst_shift
,
1465 oh
->clkdm
->pwrdm
.ptr
->prcm_partition
,
1466 oh
->clkdm
->pwrdm
.ptr
->prcm_offs
,
1467 oh
->prcm
.omap4
.rstctrl_offs
);
1474 * _are_any_hardreset_lines_asserted - return true if part of @oh is hard-reset
1475 * @oh: struct omap_hwmod *
1477 * If any hardreset line associated with @oh is asserted, then return true.
1478 * Otherwise, if @oh has no hardreset lines associated with it, or if
1479 * no hardreset lines associated with @oh are asserted, then return false.
1480 * This function is used to avoid executing some parts of the IP block
1481 * enable/disable sequence if a hardreset line is set.
1483 static bool _are_any_hardreset_lines_asserted(struct omap_hwmod
*oh
)
1487 if (oh
->rst_lines_cnt
== 0)
1490 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
1491 if (_read_hardreset(oh
, oh
->rst_lines
[i
].name
) > 0)
1498 * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4
1499 * @oh: struct omap_hwmod *
1501 * Disable the PRCM module mode related to the hwmod @oh.
1502 * Return EINVAL if the modulemode is not supported and 0 in case of success.
1504 static int _omap4_disable_module(struct omap_hwmod
*oh
)
1508 /* The module mode does not exist prior OMAP4 */
1509 if (!cpu_is_omap44xx())
1512 if (!oh
->clkdm
|| !oh
->prcm
.omap4
.modulemode
)
1515 pr_debug("omap_hwmod: %s: %s\n", oh
->name
, __func__
);
1517 omap4_cminst_module_disable(oh
->clkdm
->prcm_partition
,
1519 oh
->clkdm
->clkdm_offs
,
1520 oh
->prcm
.omap4
.clkctrl_offs
);
1522 if (_are_any_hardreset_lines_asserted(oh
))
1525 v
= _omap4_wait_target_disable(oh
);
1527 pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
1534 * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit
1535 * @oh: struct omap_hwmod *
1537 * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
1538 * enabled for this to work. Returns -ENOENT if the hwmod cannot be
1539 * reset this way, -EINVAL if the hwmod is in the wrong state,
1540 * -ETIMEDOUT if the module did not reset in time, or 0 upon success.
1542 * In OMAP3 a specific SYSSTATUS register is used to get the reset status.
1543 * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead
1544 * use the SYSCONFIG softreset bit to provide the status.
1546 * Note that some IP like McBSP do have reset control but don't have
1549 static int _ocp_softreset(struct omap_hwmod
*oh
)
1551 u32 v
, softrst_mask
;
1555 if (!oh
->class->sysc
||
1556 !(oh
->class->sysc
->sysc_flags
& SYSC_HAS_SOFTRESET
))
1559 /* clocks must be on for this operation */
1560 if (oh
->_state
!= _HWMOD_STATE_ENABLED
) {
1561 pr_warning("omap_hwmod: %s: reset can only be entered from "
1562 "enabled state\n", oh
->name
);
1566 /* For some modules, all optionnal clocks need to be enabled as well */
1567 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1568 _enable_optional_clocks(oh
);
1570 pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh
->name
);
1572 v
= oh
->_sysc_cache
;
1573 ret
= _set_softreset(oh
, &v
);
1576 _write_sysconfig(v
, oh
);
1578 if (oh
->class->sysc
->srst_udelay
)
1579 udelay(oh
->class->sysc
->srst_udelay
);
1581 if (oh
->class->sysc
->sysc_flags
& SYSS_HAS_RESET_STATUS
)
1582 omap_test_timeout((omap_hwmod_read(oh
,
1583 oh
->class->sysc
->syss_offs
)
1584 & SYSS_RESETDONE_MASK
),
1585 MAX_MODULE_SOFTRESET_WAIT
, c
);
1586 else if (oh
->class->sysc
->sysc_flags
& SYSC_HAS_RESET_STATUS
) {
1587 softrst_mask
= (0x1 << oh
->class->sysc
->sysc_fields
->srst_shift
);
1588 omap_test_timeout(!(omap_hwmod_read(oh
,
1589 oh
->class->sysc
->sysc_offs
)
1591 MAX_MODULE_SOFTRESET_WAIT
, c
);
1594 if (c
== MAX_MODULE_SOFTRESET_WAIT
)
1595 pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n",
1596 oh
->name
, MAX_MODULE_SOFTRESET_WAIT
);
1598 pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh
->name
, c
);
1601 * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
1602 * _wait_target_ready() or _reset()
1605 ret
= (c
== MAX_MODULE_SOFTRESET_WAIT
) ? -ETIMEDOUT
: 0;
1608 if (oh
->flags
& HWMOD_CONTROL_OPT_CLKS_IN_RESET
)
1609 _disable_optional_clocks(oh
);
1615 * _reset - reset an omap_hwmod
1616 * @oh: struct omap_hwmod *
1618 * Resets an omap_hwmod @oh. If the module has a custom reset
1619 * function pointer defined, then call it to reset the IP block, and
1620 * pass along its return value to the caller. Otherwise, if the IP
1621 * block has an OCP_SYSCONFIG register with a SOFTRESET bitfield
1622 * associated with it, call a function to reset the IP block via that
1623 * method, and pass along the return value to the caller. Finally, if
1624 * the IP block has some hardreset lines associated with it, assert
1625 * all of those, but do _not_ deassert them. (This is because driver
1626 * authors have expressed an apparent requirement to control the
1627 * deassertion of the hardreset lines themselves.)
1629 * The default software reset mechanism for most OMAP IP blocks is
1630 * triggered via the OCP_SYSCONFIG.SOFTRESET bit. However, some
1631 * hwmods cannot be reset via this method. Some are not targets and
1632 * therefore have no OCP header registers to access. Others (like the
1633 * IVA) have idiosyncratic reset sequences. So for these relatively
1634 * rare cases, custom reset code can be supplied in the struct
1635 * omap_hwmod_class .reset function pointer. Passes along the return
1636 * value from either _ocp_softreset() or the custom reset function -
1637 * these must return -EINVAL if the hwmod cannot be reset this way or
1638 * if the hwmod is in the wrong state, -ETIMEDOUT if the module did
1639 * not reset in time, or 0 upon success.
1641 static int _reset(struct omap_hwmod
*oh
)
1645 pr_debug("omap_hwmod: %s: resetting\n", oh
->name
);
1647 if (oh
->class->reset
) {
1648 r
= oh
->class->reset(oh
);
1650 if (oh
->rst_lines_cnt
> 0) {
1651 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
1652 _assert_hardreset(oh
, oh
->rst_lines
[i
].name
);
1655 r
= _ocp_softreset(oh
);
1662 * OCP_SYSCONFIG bits need to be reprogrammed after a
1663 * softreset. The _enable() function should be split to avoid
1664 * the rewrite of the OCP_SYSCONFIG register.
1666 if (oh
->class->sysc
) {
1667 _update_sysc_cache(oh
);
1675 * _enable - enable an omap_hwmod
1676 * @oh: struct omap_hwmod *
1678 * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
1679 * register target. Returns -EINVAL if the hwmod is in the wrong
1680 * state or passes along the return value of _wait_target_ready().
1682 static int _enable(struct omap_hwmod
*oh
)
1687 pr_debug("omap_hwmod: %s: enabling\n", oh
->name
);
1690 * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled
1691 * state at init. Now that someone is really trying to enable
1692 * them, just ensure that the hwmod mux is set.
1694 if (oh
->_int_flags
& _HWMOD_SKIP_ENABLE
) {
1696 * If the caller has mux data populated, do the mux'ing
1697 * which wouldn't have been done as part of the _enable()
1698 * done during setup.
1701 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_ENABLED
);
1703 oh
->_int_flags
&= ~_HWMOD_SKIP_ENABLE
;
1707 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
&&
1708 oh
->_state
!= _HWMOD_STATE_IDLE
&&
1709 oh
->_state
!= _HWMOD_STATE_DISABLED
) {
1710 WARN(1, "omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state\n",
1716 * If an IP block contains HW reset lines and any of them are
1717 * asserted, we let integration code associated with that
1718 * block handle the enable. We've received very little
1719 * information on what those driver authors need, and until
1720 * detailed information is provided and the driver code is
1721 * posted to the public lists, this is probably the best we
1724 if (_are_any_hardreset_lines_asserted(oh
))
1727 /* Mux pins for device runtime if populated */
1728 if (oh
->mux
&& (!oh
->mux
->enabled
||
1729 ((oh
->_state
== _HWMOD_STATE_IDLE
) &&
1730 oh
->mux
->pads_dynamic
)))
1731 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_ENABLED
);
1733 _add_initiator_dep(oh
, mpu_oh
);
1737 * A clockdomain must be in SW_SUP before enabling
1738 * completely the module. The clockdomain can be set
1739 * in HW_AUTO only when the module become ready.
1741 hwsup
= clkdm_in_hwsup(oh
->clkdm
);
1742 r
= clkdm_hwmod_enable(oh
->clkdm
, oh
);
1744 WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
1745 oh
->name
, oh
->clkdm
->name
, r
);
1753 r
= _wait_target_ready(oh
);
1756 * Set the clockdomain to HW_AUTO only if the target is ready,
1757 * assuming that the previous state was HW_AUTO
1759 if (oh
->clkdm
&& hwsup
)
1760 clkdm_allow_idle(oh
->clkdm
);
1762 oh
->_state
= _HWMOD_STATE_ENABLED
;
1764 /* Access the sysconfig only if the target is ready */
1765 if (oh
->class->sysc
) {
1766 if (!(oh
->_int_flags
& _HWMOD_SYSCONFIG_LOADED
))
1767 _update_sysc_cache(oh
);
1771 _disable_clocks(oh
);
1772 pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n",
1776 clkdm_hwmod_disable(oh
->clkdm
, oh
);
1783 * _idle - idle an omap_hwmod
1784 * @oh: struct omap_hwmod *
1786 * Idles an omap_hwmod @oh. This should be called once the hwmod has
1787 * no further work. Returns -EINVAL if the hwmod is in the wrong
1788 * state or returns 0.
1790 static int _idle(struct omap_hwmod
*oh
)
1792 pr_debug("omap_hwmod: %s: idling\n", oh
->name
);
1794 if (oh
->_state
!= _HWMOD_STATE_ENABLED
) {
1795 WARN(1, "omap_hwmod: %s: idle state can only be entered from enabled state\n",
1800 if (_are_any_hardreset_lines_asserted(oh
))
1803 if (oh
->class->sysc
)
1805 _del_initiator_dep(oh
, mpu_oh
);
1807 _omap4_disable_module(oh
);
1810 * The module must be in idle mode before disabling any parents
1811 * clocks. Otherwise, the parent clock might be disabled before
1812 * the module transition is done, and thus will prevent the
1813 * transition to complete properly.
1815 _disable_clocks(oh
);
1817 clkdm_hwmod_disable(oh
->clkdm
, oh
);
1819 /* Mux pins for device idle if populated */
1820 if (oh
->mux
&& oh
->mux
->pads_dynamic
)
1821 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_IDLE
);
1823 oh
->_state
= _HWMOD_STATE_IDLE
;
1829 * omap_hwmod_set_ocp_autoidle - set the hwmod's OCP autoidle bit
1830 * @oh: struct omap_hwmod *
1831 * @autoidle: desired AUTOIDLE bitfield value (0 or 1)
1833 * Sets the IP block's OCP autoidle bit in hardware, and updates our
1834 * local copy. Intended to be used by drivers that require
1835 * direct manipulation of the AUTOIDLE bits.
1836 * Returns -EINVAL if @oh is null or is not in the ENABLED state, or passes
1837 * along the return value from _set_module_autoidle().
1839 * Any users of this function should be scrutinized carefully.
1841 int omap_hwmod_set_ocp_autoidle(struct omap_hwmod
*oh
, u8 autoidle
)
1845 unsigned long flags
;
1847 if (!oh
|| oh
->_state
!= _HWMOD_STATE_ENABLED
)
1850 spin_lock_irqsave(&oh
->_lock
, flags
);
1852 v
= oh
->_sysc_cache
;
1854 retval
= _set_module_autoidle(oh
, autoidle
, &v
);
1857 _write_sysconfig(v
, oh
);
1859 spin_unlock_irqrestore(&oh
->_lock
, flags
);
1865 * _shutdown - shutdown an omap_hwmod
1866 * @oh: struct omap_hwmod *
1868 * Shut down an omap_hwmod @oh. This should be called when the driver
1869 * used for the hwmod is removed or unloaded or if the driver is not
1870 * used by the system. Returns -EINVAL if the hwmod is in the wrong
1871 * state or returns 0.
1873 static int _shutdown(struct omap_hwmod
*oh
)
1878 if (oh
->_state
!= _HWMOD_STATE_IDLE
&&
1879 oh
->_state
!= _HWMOD_STATE_ENABLED
) {
1880 WARN(1, "omap_hwmod: %s: disabled state can only be entered from idle, or enabled state\n",
1885 if (_are_any_hardreset_lines_asserted(oh
))
1888 pr_debug("omap_hwmod: %s: disabling\n", oh
->name
);
1890 if (oh
->class->pre_shutdown
) {
1891 prev_state
= oh
->_state
;
1892 if (oh
->_state
== _HWMOD_STATE_IDLE
)
1894 ret
= oh
->class->pre_shutdown(oh
);
1896 if (prev_state
== _HWMOD_STATE_IDLE
)
1902 if (oh
->class->sysc
) {
1903 if (oh
->_state
== _HWMOD_STATE_IDLE
)
1908 /* clocks and deps are already disabled in idle */
1909 if (oh
->_state
== _HWMOD_STATE_ENABLED
) {
1910 _del_initiator_dep(oh
, mpu_oh
);
1911 /* XXX what about the other system initiators here? dma, dsp */
1912 _omap4_disable_module(oh
);
1913 _disable_clocks(oh
);
1915 clkdm_hwmod_disable(oh
->clkdm
, oh
);
1917 /* XXX Should this code also force-disable the optional clocks? */
1919 for (i
= 0; i
< oh
->rst_lines_cnt
; i
++)
1920 _assert_hardreset(oh
, oh
->rst_lines
[i
].name
);
1922 /* Mux pins to safe mode or use populated off mode values */
1924 omap_hwmod_mux(oh
->mux
, _HWMOD_STATE_DISABLED
);
1926 oh
->_state
= _HWMOD_STATE_DISABLED
;
1932 * _init_mpu_rt_base - populate the virtual address for a hwmod
1933 * @oh: struct omap_hwmod * to locate the virtual address
1935 * Cache the virtual address used by the MPU to access this IP block's
1936 * registers. This address is needed early so the OCP registers that
1937 * are part of the device's address space can be ioremapped properly.
1940 static void __init
_init_mpu_rt_base(struct omap_hwmod
*oh
, void *data
)
1942 struct omap_hwmod_addr_space
*mem
;
1943 void __iomem
*va_start
;
1948 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
1951 mem
= _find_mpu_rt_addr_space(oh
);
1953 pr_debug("omap_hwmod: %s: no MPU register target found\n",
1958 va_start
= ioremap(mem
->pa_start
, mem
->pa_end
- mem
->pa_start
);
1960 pr_err("omap_hwmod: %s: Could not ioremap\n", oh
->name
);
1964 pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
1965 oh
->name
, va_start
);
1967 oh
->_mpu_rt_va
= va_start
;
1971 * _init - initialize internal data for the hwmod @oh
1972 * @oh: struct omap_hwmod *
1975 * Look up the clocks and the address space used by the MPU to access
1976 * registers belonging to the hwmod @oh. @oh must already be
1977 * registered at this point. This is the first of two phases for
1978 * hwmod initialization. Code called here does not touch any hardware
1979 * registers, it simply prepares internal data structures. Returns 0
1980 * upon success or if the hwmod isn't registered, or -EINVAL upon
1983 static int __init
_init(struct omap_hwmod
*oh
, void *data
)
1987 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
)
1990 _init_mpu_rt_base(oh
, NULL
);
1992 r
= _init_clocks(oh
, NULL
);
1993 if (IS_ERR_VALUE(r
)) {
1994 WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh
->name
);
1998 oh
->_state
= _HWMOD_STATE_INITIALIZED
;
2004 * _setup_iclk_autoidle - configure an IP block's interface clocks
2005 * @oh: struct omap_hwmod *
2007 * Set up the module's interface clocks. XXX This function is still mostly
2008 * a stub; implementing this properly requires iclk autoidle usecounting in
2009 * the clock code. No return value.
2011 static void __init
_setup_iclk_autoidle(struct omap_hwmod
*oh
)
2015 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2018 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
2019 struct omap_hwmod_ocp_if
*os
= oh
->slaves
[i
];
2020 struct clk
*c
= os
->_clk
;
2025 if (os
->flags
& OCPIF_SWSUP_IDLE
) {
2026 /* XXX omap_iclk_deny_idle(c); */
2028 /* XXX omap_iclk_allow_idle(c); */
2037 * _setup_reset - reset an IP block during the setup process
2038 * @oh: struct omap_hwmod *
2040 * Reset the IP block corresponding to the hwmod @oh during the setup
2041 * process. The IP block is first enabled so it can be successfully
2042 * reset. Returns 0 upon success or a negative error code upon
2045 static int __init
_setup_reset(struct omap_hwmod
*oh
)
2049 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2052 if (oh
->rst_lines_cnt
== 0) {
2055 pr_warning("omap_hwmod: %s: cannot be enabled for reset (%d)\n",
2056 oh
->name
, oh
->_state
);
2061 if (!(oh
->flags
& HWMOD_INIT_NO_RESET
))
2068 * _setup_postsetup - transition to the appropriate state after _setup
2069 * @oh: struct omap_hwmod *
2071 * Place an IP block represented by @oh into a "post-setup" state --
2072 * either IDLE, ENABLED, or DISABLED. ("post-setup" simply means that
2073 * this function is called at the end of _setup().) The postsetup
2074 * state for an IP block can be changed by calling
2075 * omap_hwmod_enter_postsetup_state() early in the boot process,
2076 * before one of the omap_hwmod_setup*() functions are called for the
2079 * The IP block stays in this state until a PM runtime-based driver is
2080 * loaded for that IP block. A post-setup state of IDLE is
2081 * appropriate for almost all IP blocks with runtime PM-enabled
2082 * drivers, since those drivers are able to enable the IP block. A
2083 * post-setup state of ENABLED is appropriate for kernels with PM
2084 * runtime disabled. The DISABLED state is appropriate for unusual IP
2085 * blocks such as the MPU WDTIMER on kernels without WDTIMER drivers
2086 * included, since the WDTIMER starts running on reset and will reset
2087 * the MPU if left active.
2089 * This post-setup mechanism is deprecated. Once all of the OMAP
2090 * drivers have been converted to use PM runtime, and all of the IP
2091 * block data and interconnect data is available to the hwmod code, it
2092 * should be possible to replace this mechanism with a "lazy reset"
2093 * arrangement. In a "lazy reset" setup, each IP block is enabled
2094 * when the driver first probes, then all remaining IP blocks without
2095 * drivers are either shut down or enabled after the drivers have
2096 * loaded. However, this cannot take place until the above
2097 * preconditions have been met, since otherwise the late reset code
2098 * has no way of knowing which IP blocks are in use by drivers, and
2099 * which ones are unused.
2103 static void __init
_setup_postsetup(struct omap_hwmod
*oh
)
2107 if (oh
->rst_lines_cnt
> 0)
2110 postsetup_state
= oh
->_postsetup_state
;
2111 if (postsetup_state
== _HWMOD_STATE_UNKNOWN
)
2112 postsetup_state
= _HWMOD_STATE_ENABLED
;
2115 * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data -
2116 * it should be set by the core code as a runtime flag during startup
2118 if ((oh
->flags
& HWMOD_INIT_NO_IDLE
) &&
2119 (postsetup_state
== _HWMOD_STATE_IDLE
)) {
2120 oh
->_int_flags
|= _HWMOD_SKIP_ENABLE
;
2121 postsetup_state
= _HWMOD_STATE_ENABLED
;
2124 if (postsetup_state
== _HWMOD_STATE_IDLE
)
2126 else if (postsetup_state
== _HWMOD_STATE_DISABLED
)
2128 else if (postsetup_state
!= _HWMOD_STATE_ENABLED
)
2129 WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n",
2130 oh
->name
, postsetup_state
);
2136 * _setup - prepare IP block hardware for use
2137 * @oh: struct omap_hwmod *
2138 * @n: (unused, pass NULL)
2140 * Configure the IP block represented by @oh. This may include
2141 * enabling the IP block, resetting it, and placing it into a
2142 * post-setup state, depending on the type of IP block and applicable
2143 * flags. IP blocks are reset to prevent any previous configuration
2144 * by the bootloader or previous operating system from interfering
2145 * with power management or other parts of the system. The reset can
2146 * be avoided; see omap_hwmod_no_setup_reset(). This is the second of
2147 * two phases for hwmod initialization. Code called here generally
2148 * affects the IP block hardware, or system integration hardware
2149 * associated with the IP block. Returns 0.
2151 static int __init
_setup(struct omap_hwmod
*oh
, void *data
)
2153 if (oh
->_state
!= _HWMOD_STATE_INITIALIZED
)
2156 _setup_iclk_autoidle(oh
);
2158 if (!_setup_reset(oh
))
2159 _setup_postsetup(oh
);
2165 * _register - register a struct omap_hwmod
2166 * @oh: struct omap_hwmod *
2168 * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
2169 * already has been registered by the same name; -EINVAL if the
2170 * omap_hwmod is in the wrong state, if @oh is NULL, if the
2171 * omap_hwmod's class field is NULL; if the omap_hwmod is missing a
2172 * name, or if the omap_hwmod's class is missing a name; or 0 upon
2175 * XXX The data should be copied into bootmem, so the original data
2176 * should be marked __initdata and freed after init. This would allow
2177 * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
2178 * that the copy process would be relatively complex due to the large number
2181 static int __init
_register(struct omap_hwmod
*oh
)
2185 if (!oh
|| !oh
->name
|| !oh
->class || !oh
->class->name
||
2186 (oh
->_state
!= _HWMOD_STATE_UNKNOWN
))
2189 pr_debug("omap_hwmod: %s: registering\n", oh
->name
);
2191 if (_lookup(oh
->name
))
2194 ms_id
= _find_mpu_port_index(oh
);
2195 if (!IS_ERR_VALUE(ms_id
))
2196 oh
->_mpu_port_index
= ms_id
;
2198 oh
->_int_flags
|= _HWMOD_NO_MPU_PORT
;
2200 list_add_tail(&oh
->node
, &omap_hwmod_list
);
2202 spin_lock_init(&oh
->_lock
);
2204 oh
->_state
= _HWMOD_STATE_REGISTERED
;
2207 * XXX Rather than doing a strcmp(), this should test a flag
2208 * set in the hwmod data, inserted by the autogenerator code.
2210 if (!strcmp(oh
->name
, MPU_INITIATOR_NAME
))
2217 /* Public functions */
2219 u32
omap_hwmod_read(struct omap_hwmod
*oh
, u16 reg_offs
)
2221 if (oh
->flags
& HWMOD_16BIT_REG
)
2222 return __raw_readw(oh
->_mpu_rt_va
+ reg_offs
);
2224 return __raw_readl(oh
->_mpu_rt_va
+ reg_offs
);
2227 void omap_hwmod_write(u32 v
, struct omap_hwmod
*oh
, u16 reg_offs
)
2229 if (oh
->flags
& HWMOD_16BIT_REG
)
2230 __raw_writew(v
, oh
->_mpu_rt_va
+ reg_offs
);
2232 __raw_writel(v
, oh
->_mpu_rt_va
+ reg_offs
);
2236 * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit
2237 * @oh: struct omap_hwmod *
2239 * This is a public function exposed to drivers. Some drivers may need to do
2240 * some settings before and after resetting the device. Those drivers after
2241 * doing the necessary settings could use this function to start a reset by
2242 * setting the SYSCONFIG.SOFTRESET bit.
2244 int omap_hwmod_softreset(struct omap_hwmod
*oh
)
2249 if (!oh
|| !(oh
->_sysc_cache
))
2252 v
= oh
->_sysc_cache
;
2253 ret
= _set_softreset(oh
, &v
);
2256 _write_sysconfig(v
, oh
);
2263 * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode
2264 * @oh: struct omap_hwmod *
2265 * @idlemode: SIDLEMODE field bits (shifted to bit 0)
2267 * Sets the IP block's OCP slave idlemode in hardware, and updates our
2268 * local copy. Intended to be used by drivers that have some erratum
2269 * that requires direct manipulation of the SIDLEMODE bits. Returns
2270 * -EINVAL if @oh is null, or passes along the return value from
2271 * _set_slave_idlemode().
2273 * XXX Does this function have any current users? If not, we should
2274 * remove it; it is better to let the rest of the hwmod code handle this.
2275 * Any users of this function should be scrutinized carefully.
2277 int omap_hwmod_set_slave_idlemode(struct omap_hwmod
*oh
, u8 idlemode
)
2285 v
= oh
->_sysc_cache
;
2287 retval
= _set_slave_idlemode(oh
, idlemode
, &v
);
2289 _write_sysconfig(v
, oh
);
2295 * omap_hwmod_lookup - look up a registered omap_hwmod by name
2296 * @name: name of the omap_hwmod to look up
2298 * Given a @name of an omap_hwmod, return a pointer to the registered
2299 * struct omap_hwmod *, or NULL upon error.
2301 struct omap_hwmod
*omap_hwmod_lookup(const char *name
)
2303 struct omap_hwmod
*oh
;
2314 * omap_hwmod_for_each - call function for each registered omap_hwmod
2315 * @fn: pointer to a callback function
2316 * @data: void * data to pass to callback function
2318 * Call @fn for each registered omap_hwmod, passing @data to each
2319 * function. @fn must return 0 for success or any other value for
2320 * failure. If @fn returns non-zero, the iteration across omap_hwmods
2321 * will stop and the non-zero return value will be passed to the
2322 * caller of omap_hwmod_for_each(). @fn is called with
2323 * omap_hwmod_for_each() held.
2325 int omap_hwmod_for_each(int (*fn
)(struct omap_hwmod
*oh
, void *data
),
2328 struct omap_hwmod
*temp_oh
;
2334 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
2335 ret
= (*fn
)(temp_oh
, data
);
2344 * omap_hwmod_register - register an array of hwmods
2345 * @ohs: pointer to an array of omap_hwmods to register
2347 * Intended to be called early in boot before the clock framework is
2348 * initialized. If @ohs is not null, will register all omap_hwmods
2349 * listed in @ohs that are valid for this chip. Returns 0.
2351 int __init
omap_hwmod_register(struct omap_hwmod
**ohs
)
2360 r
= _register(ohs
[i
]);
2361 WARN(r
, "omap_hwmod: %s: _register returned %d\n", ohs
[i
]->name
,
2369 * _ensure_mpu_hwmod_is_setup - ensure the MPU SS hwmod is init'ed and set up
2370 * @oh: pointer to the hwmod currently being set up (usually not the MPU)
2372 * If the hwmod data corresponding to the MPU subsystem IP block
2373 * hasn't been initialized and set up yet, do so now. This must be
2374 * done first since sleep dependencies may be added from other hwmods
2375 * to the MPU. Intended to be called only by omap_hwmod_setup*(). No
2378 static void __init
_ensure_mpu_hwmod_is_setup(struct omap_hwmod
*oh
)
2380 if (!mpu_oh
|| mpu_oh
->_state
== _HWMOD_STATE_UNKNOWN
)
2381 pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n",
2382 __func__
, MPU_INITIATOR_NAME
);
2383 else if (mpu_oh
->_state
== _HWMOD_STATE_REGISTERED
&& oh
!= mpu_oh
)
2384 omap_hwmod_setup_one(MPU_INITIATOR_NAME
);
2388 * omap_hwmod_setup_one - set up a single hwmod
2389 * @oh_name: const char * name of the already-registered hwmod to set up
2391 * Initialize and set up a single hwmod. Intended to be used for a
2392 * small number of early devices, such as the timer IP blocks used for
2393 * the scheduler clock. Must be called after omap2_clk_init().
2394 * Resolves the struct clk names to struct clk pointers for each
2395 * registered omap_hwmod. Also calls _setup() on each hwmod. Returns
2396 * -EINVAL upon error or 0 upon success.
2398 int __init
omap_hwmod_setup_one(const char *oh_name
)
2400 struct omap_hwmod
*oh
;
2402 pr_debug("omap_hwmod: %s: %s\n", oh_name
, __func__
);
2404 oh
= _lookup(oh_name
);
2406 WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name
);
2410 _ensure_mpu_hwmod_is_setup(oh
);
2419 * omap_hwmod_setup_all - set up all registered IP blocks
2421 * Initialize and set up all IP blocks registered with the hwmod code.
2422 * Must be called after omap2_clk_init(). Resolves the struct clk
2423 * names to struct clk pointers for each registered omap_hwmod. Also
2424 * calls _setup() on each hwmod. Returns 0 upon success.
2426 static int __init
omap_hwmod_setup_all(void)
2428 _ensure_mpu_hwmod_is_setup(NULL
);
2430 omap_hwmod_for_each(_init
, NULL
);
2431 omap_hwmod_for_each(_setup
, NULL
);
2435 core_initcall(omap_hwmod_setup_all
);
2438 * omap_hwmod_enable - enable an omap_hwmod
2439 * @oh: struct omap_hwmod *
2441 * Enable an omap_hwmod @oh. Intended to be called by omap_device_enable().
2442 * Returns -EINVAL on error or passes along the return value from _enable().
2444 int omap_hwmod_enable(struct omap_hwmod
*oh
)
2447 unsigned long flags
;
2452 spin_lock_irqsave(&oh
->_lock
, flags
);
2454 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2460 * omap_hwmod_idle - idle an omap_hwmod
2461 * @oh: struct omap_hwmod *
2463 * Idle an omap_hwmod @oh. Intended to be called by omap_device_idle().
2464 * Returns -EINVAL on error or passes along the return value from _idle().
2466 int omap_hwmod_idle(struct omap_hwmod
*oh
)
2468 unsigned long flags
;
2473 spin_lock_irqsave(&oh
->_lock
, flags
);
2475 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2481 * omap_hwmod_shutdown - shutdown an omap_hwmod
2482 * @oh: struct omap_hwmod *
2484 * Shutdown an omap_hwmod @oh. Intended to be called by
2485 * omap_device_shutdown(). Returns -EINVAL on error or passes along
2486 * the return value from _shutdown().
2488 int omap_hwmod_shutdown(struct omap_hwmod
*oh
)
2490 unsigned long flags
;
2495 spin_lock_irqsave(&oh
->_lock
, flags
);
2497 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2503 * omap_hwmod_enable_clocks - enable main_clk, all interface clocks
2504 * @oh: struct omap_hwmod *oh
2506 * Intended to be called by the omap_device code.
2508 int omap_hwmod_enable_clocks(struct omap_hwmod
*oh
)
2510 unsigned long flags
;
2512 spin_lock_irqsave(&oh
->_lock
, flags
);
2514 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2520 * omap_hwmod_disable_clocks - disable main_clk, all interface clocks
2521 * @oh: struct omap_hwmod *oh
2523 * Intended to be called by the omap_device code.
2525 int omap_hwmod_disable_clocks(struct omap_hwmod
*oh
)
2527 unsigned long flags
;
2529 spin_lock_irqsave(&oh
->_lock
, flags
);
2530 _disable_clocks(oh
);
2531 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2537 * omap_hwmod_ocp_barrier - wait for posted writes against the hwmod to complete
2538 * @oh: struct omap_hwmod *oh
2540 * Intended to be called by drivers and core code when all posted
2541 * writes to a device must complete before continuing further
2542 * execution (for example, after clearing some device IRQSTATUS
2545 * XXX what about targets with multiple OCP threads?
2547 void omap_hwmod_ocp_barrier(struct omap_hwmod
*oh
)
2551 if (!oh
->class->sysc
|| !oh
->class->sysc
->sysc_flags
) {
2552 WARN(1, "omap_device: %s: OCP barrier impossible due to device configuration\n",
2558 * Forces posted writes to complete on the OCP thread handling
2561 omap_hwmod_read(oh
, oh
->class->sysc
->sysc_offs
);
2565 * omap_hwmod_reset - reset the hwmod
2566 * @oh: struct omap_hwmod *
2568 * Under some conditions, a driver may wish to reset the entire device.
2569 * Called from omap_device code. Returns -EINVAL on error or passes along
2570 * the return value from _reset().
2572 int omap_hwmod_reset(struct omap_hwmod
*oh
)
2575 unsigned long flags
;
2580 spin_lock_irqsave(&oh
->_lock
, flags
);
2582 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2588 * IP block data retrieval functions
2592 * omap_hwmod_count_resources - count number of struct resources needed by hwmod
2593 * @oh: struct omap_hwmod *
2594 * @res: pointer to the first element of an array of struct resource to fill
2596 * Count the number of struct resource array elements necessary to
2597 * contain omap_hwmod @oh resources. Intended to be called by code
2598 * that registers omap_devices. Intended to be used to determine the
2599 * size of a dynamically-allocated struct resource array, before
2600 * calling omap_hwmod_fill_resources(). Returns the number of struct
2601 * resource array elements needed.
2603 * XXX This code is not optimized. It could attempt to merge adjacent
2607 int omap_hwmod_count_resources(struct omap_hwmod
*oh
)
2611 ret
= _count_mpu_irqs(oh
) + _count_sdma_reqs(oh
);
2613 for (i
= 0; i
< oh
->slaves_cnt
; i
++)
2614 ret
+= _count_ocp_if_addr_spaces(oh
->slaves
[i
]);
2620 * omap_hwmod_fill_resources - fill struct resource array with hwmod data
2621 * @oh: struct omap_hwmod *
2622 * @res: pointer to the first element of an array of struct resource to fill
2624 * Fill the struct resource array @res with resource data from the
2625 * omap_hwmod @oh. Intended to be called by code that registers
2626 * omap_devices. See also omap_hwmod_count_resources(). Returns the
2627 * number of array elements filled.
2629 int omap_hwmod_fill_resources(struct omap_hwmod
*oh
, struct resource
*res
)
2631 int i
, j
, mpu_irqs_cnt
, sdma_reqs_cnt
;
2634 /* For each IRQ, DMA, memory area, fill in array.*/
2636 mpu_irqs_cnt
= _count_mpu_irqs(oh
);
2637 for (i
= 0; i
< mpu_irqs_cnt
; i
++) {
2638 (res
+ r
)->name
= (oh
->mpu_irqs
+ i
)->name
;
2639 (res
+ r
)->start
= (oh
->mpu_irqs
+ i
)->irq
;
2640 (res
+ r
)->end
= (oh
->mpu_irqs
+ i
)->irq
;
2641 (res
+ r
)->flags
= IORESOURCE_IRQ
;
2645 sdma_reqs_cnt
= _count_sdma_reqs(oh
);
2646 for (i
= 0; i
< sdma_reqs_cnt
; i
++) {
2647 (res
+ r
)->name
= (oh
->sdma_reqs
+ i
)->name
;
2648 (res
+ r
)->start
= (oh
->sdma_reqs
+ i
)->dma_req
;
2649 (res
+ r
)->end
= (oh
->sdma_reqs
+ i
)->dma_req
;
2650 (res
+ r
)->flags
= IORESOURCE_DMA
;
2654 for (i
= 0; i
< oh
->slaves_cnt
; i
++) {
2655 struct omap_hwmod_ocp_if
*os
;
2659 addr_cnt
= _count_ocp_if_addr_spaces(os
);
2661 for (j
= 0; j
< addr_cnt
; j
++) {
2662 (res
+ r
)->name
= (os
->addr
+ j
)->name
;
2663 (res
+ r
)->start
= (os
->addr
+ j
)->pa_start
;
2664 (res
+ r
)->end
= (os
->addr
+ j
)->pa_end
;
2665 (res
+ r
)->flags
= IORESOURCE_MEM
;
2674 * omap_hwmod_get_resource_byname - fetch IP block integration data by name
2675 * @oh: struct omap_hwmod * to operate on
2676 * @type: one of the IORESOURCE_* constants from include/linux/ioport.h
2677 * @name: pointer to the name of the data to fetch (optional)
2678 * @rsrc: pointer to a struct resource, allocated by the caller
2680 * Retrieve MPU IRQ, SDMA request line, or address space start/end
2681 * data for the IP block pointed to by @oh. The data will be filled
2682 * into a struct resource record pointed to by @rsrc. The struct
2683 * resource must be allocated by the caller. When @name is non-null,
2684 * the data associated with the matching entry in the IRQ/SDMA/address
2685 * space hwmod data arrays will be returned. If @name is null, the
2686 * first array entry will be returned. Data order is not meaningful
2687 * in hwmod data, so callers are strongly encouraged to use a non-null
2688 * @name whenever possible to avoid unpredictable effects if hwmod
2689 * data is later added that causes data ordering to change. This
2690 * function is only intended for use by OMAP core code. Device
2691 * drivers should not call this function - the appropriate bus-related
2692 * data accessor functions should be used instead. Returns 0 upon
2693 * success or a negative error code upon error.
2695 int omap_hwmod_get_resource_byname(struct omap_hwmod
*oh
, unsigned int type
,
2696 const char *name
, struct resource
*rsrc
)
2699 unsigned int irq
, dma
;
2700 u32 pa_start
, pa_end
;
2705 if (type
== IORESOURCE_IRQ
) {
2706 r
= _get_mpu_irq_by_name(oh
, name
, &irq
);
2712 } else if (type
== IORESOURCE_DMA
) {
2713 r
= _get_sdma_req_by_name(oh
, name
, &dma
);
2719 } else if (type
== IORESOURCE_MEM
) {
2720 r
= _get_addr_space_by_name(oh
, name
, &pa_start
, &pa_end
);
2724 rsrc
->start
= pa_start
;
2737 * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain
2738 * @oh: struct omap_hwmod *
2740 * Return the powerdomain pointer associated with the OMAP module
2741 * @oh's main clock. If @oh does not have a main clk, return the
2742 * powerdomain associated with the interface clock associated with the
2743 * module's MPU port. (XXX Perhaps this should use the SDMA port
2744 * instead?) Returns NULL on error, or a struct powerdomain * on
2747 struct powerdomain
*omap_hwmod_get_pwrdm(struct omap_hwmod
*oh
)
2757 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
2759 c
= oh
->slaves
[oh
->_mpu_port_index
]->_clk
;
2765 return c
->clkdm
->pwrdm
.ptr
;
2770 * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU)
2771 * @oh: struct omap_hwmod *
2773 * Returns the virtual address corresponding to the beginning of the
2774 * module's register target, in the address range that is intended to
2775 * be used by the MPU. Returns the virtual address upon success or NULL
2778 void __iomem
*omap_hwmod_get_mpu_rt_va(struct omap_hwmod
*oh
)
2783 if (oh
->_int_flags
& _HWMOD_NO_MPU_PORT
)
2786 if (oh
->_state
== _HWMOD_STATE_UNKNOWN
)
2789 return oh
->_mpu_rt_va
;
2793 * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh
2794 * @oh: struct omap_hwmod *
2795 * @init_oh: struct omap_hwmod * (initiator)
2797 * Add a sleep dependency between the initiator @init_oh and @oh.
2798 * Intended to be called by DSP/Bridge code via platform_data for the
2799 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
2800 * code needs to add/del initiator dependencies dynamically
2801 * before/after accessing a device. Returns the return value from
2802 * _add_initiator_dep().
2804 * XXX Keep a usecount in the clockdomain code
2806 int omap_hwmod_add_initiator_dep(struct omap_hwmod
*oh
,
2807 struct omap_hwmod
*init_oh
)
2809 return _add_initiator_dep(oh
, init_oh
);
2813 * XXX what about functions for drivers to save/restore ocp_sysconfig
2814 * for context save/restore operations?
2818 * omap_hwmod_del_initiator_dep - remove sleepdep from @init_oh to @oh
2819 * @oh: struct omap_hwmod *
2820 * @init_oh: struct omap_hwmod * (initiator)
2822 * Remove a sleep dependency between the initiator @init_oh and @oh.
2823 * Intended to be called by DSP/Bridge code via platform_data for the
2824 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
2825 * code needs to add/del initiator dependencies dynamically
2826 * before/after accessing a device. Returns the return value from
2827 * _del_initiator_dep().
2829 * XXX Keep a usecount in the clockdomain code
2831 int omap_hwmod_del_initiator_dep(struct omap_hwmod
*oh
,
2832 struct omap_hwmod
*init_oh
)
2834 return _del_initiator_dep(oh
, init_oh
);
2838 * omap_hwmod_enable_wakeup - allow device to wake up the system
2839 * @oh: struct omap_hwmod *
2841 * Sets the module OCP socket ENAWAKEUP bit to allow the module to
2842 * send wakeups to the PRCM, and enable I/O ring wakeup events for
2843 * this IP block if it has dynamic mux entries. Eventually this
2844 * should set PRCM wakeup registers to cause the PRCM to receive
2845 * wakeup events from the module. Does not set any wakeup routing
2846 * registers beyond this point - if the module is to wake up any other
2847 * module or subsystem, that must be set separately. Called by
2848 * omap_device code. Returns -EINVAL on error or 0 upon success.
2850 int omap_hwmod_enable_wakeup(struct omap_hwmod
*oh
)
2852 unsigned long flags
;
2855 spin_lock_irqsave(&oh
->_lock
, flags
);
2857 if (oh
->class->sysc
&&
2858 (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)) {
2859 v
= oh
->_sysc_cache
;
2860 _enable_wakeup(oh
, &v
);
2861 _write_sysconfig(v
, oh
);
2864 _set_idle_ioring_wakeup(oh
, true);
2865 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2871 * omap_hwmod_disable_wakeup - prevent device from waking the system
2872 * @oh: struct omap_hwmod *
2874 * Clears the module OCP socket ENAWAKEUP bit to prevent the module
2875 * from sending wakeups to the PRCM, and disable I/O ring wakeup
2876 * events for this IP block if it has dynamic mux entries. Eventually
2877 * this should clear PRCM wakeup registers to cause the PRCM to ignore
2878 * wakeup events from the module. Does not set any wakeup routing
2879 * registers beyond this point - if the module is to wake up any other
2880 * module or subsystem, that must be set separately. Called by
2881 * omap_device code. Returns -EINVAL on error or 0 upon success.
2883 int omap_hwmod_disable_wakeup(struct omap_hwmod
*oh
)
2885 unsigned long flags
;
2888 spin_lock_irqsave(&oh
->_lock
, flags
);
2890 if (oh
->class->sysc
&&
2891 (oh
->class->sysc
->sysc_flags
& SYSC_HAS_ENAWAKEUP
)) {
2892 v
= oh
->_sysc_cache
;
2893 _disable_wakeup(oh
, &v
);
2894 _write_sysconfig(v
, oh
);
2897 _set_idle_ioring_wakeup(oh
, false);
2898 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2904 * omap_hwmod_assert_hardreset - assert the HW reset line of submodules
2905 * contained in the hwmod module.
2906 * @oh: struct omap_hwmod *
2907 * @name: name of the reset line to lookup and assert
2909 * Some IP like dsp, ipu or iva contain processor that require
2910 * an HW reset line to be assert / deassert in order to enable fully
2911 * the IP. Returns -EINVAL if @oh is null or if the operation is not
2912 * yet supported on this OMAP; otherwise, passes along the return value
2913 * from _assert_hardreset().
2915 int omap_hwmod_assert_hardreset(struct omap_hwmod
*oh
, const char *name
)
2918 unsigned long flags
;
2923 spin_lock_irqsave(&oh
->_lock
, flags
);
2924 ret
= _assert_hardreset(oh
, name
);
2925 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2931 * omap_hwmod_deassert_hardreset - deassert the HW reset line of submodules
2932 * contained in the hwmod module.
2933 * @oh: struct omap_hwmod *
2934 * @name: name of the reset line to look up and deassert
2936 * Some IP like dsp, ipu or iva contain processor that require
2937 * an HW reset line to be assert / deassert in order to enable fully
2938 * the IP. Returns -EINVAL if @oh is null or if the operation is not
2939 * yet supported on this OMAP; otherwise, passes along the return value
2940 * from _deassert_hardreset().
2942 int omap_hwmod_deassert_hardreset(struct omap_hwmod
*oh
, const char *name
)
2945 unsigned long flags
;
2950 spin_lock_irqsave(&oh
->_lock
, flags
);
2951 ret
= _deassert_hardreset(oh
, name
);
2952 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2958 * omap_hwmod_read_hardreset - read the HW reset line state of submodules
2959 * contained in the hwmod module
2960 * @oh: struct omap_hwmod *
2961 * @name: name of the reset line to look up and read
2963 * Return the current state of the hwmod @oh's reset line named @name:
2964 * returns -EINVAL upon parameter error or if this operation
2965 * is unsupported on the current OMAP; otherwise, passes along the return
2966 * value from _read_hardreset().
2968 int omap_hwmod_read_hardreset(struct omap_hwmod
*oh
, const char *name
)
2971 unsigned long flags
;
2976 spin_lock_irqsave(&oh
->_lock
, flags
);
2977 ret
= _read_hardreset(oh
, name
);
2978 spin_unlock_irqrestore(&oh
->_lock
, flags
);
2985 * omap_hwmod_for_each_by_class - call @fn for each hwmod of class @classname
2986 * @classname: struct omap_hwmod_class name to search for
2987 * @fn: callback function pointer to call for each hwmod in class @classname
2988 * @user: arbitrary context data to pass to the callback function
2990 * For each omap_hwmod of class @classname, call @fn.
2991 * If the callback function returns something other than
2992 * zero, the iterator is terminated, and the callback function's return
2993 * value is passed back to the caller. Returns 0 upon success, -EINVAL
2994 * if @classname or @fn are NULL, or passes back the error code from @fn.
2996 int omap_hwmod_for_each_by_class(const char *classname
,
2997 int (*fn
)(struct omap_hwmod
*oh
,
3001 struct omap_hwmod
*temp_oh
;
3004 if (!classname
|| !fn
)
3007 pr_debug("omap_hwmod: %s: looking for modules of class %s\n",
3008 __func__
, classname
);
3010 list_for_each_entry(temp_oh
, &omap_hwmod_list
, node
) {
3011 if (!strcmp(temp_oh
->class->name
, classname
)) {
3012 pr_debug("omap_hwmod: %s: %s: calling callback fn\n",
3013 __func__
, temp_oh
->name
);
3014 ret
= (*fn
)(temp_oh
, user
);
3021 pr_debug("omap_hwmod: %s: iterator terminated early: %d\n",
3028 * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod
3029 * @oh: struct omap_hwmod *
3030 * @state: state that _setup() should leave the hwmod in
3032 * Sets the hwmod state that @oh will enter at the end of _setup()
3033 * (called by omap_hwmod_setup_*()). See also the documentation
3034 * for _setup_postsetup(), above. Returns 0 upon success or
3035 * -EINVAL if there is a problem with the arguments or if the hwmod is
3036 * in the wrong state.
3038 int omap_hwmod_set_postsetup_state(struct omap_hwmod
*oh
, u8 state
)
3041 unsigned long flags
;
3046 if (state
!= _HWMOD_STATE_DISABLED
&&
3047 state
!= _HWMOD_STATE_ENABLED
&&
3048 state
!= _HWMOD_STATE_IDLE
)
3051 spin_lock_irqsave(&oh
->_lock
, flags
);
3053 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
) {
3058 oh
->_postsetup_state
= state
;
3062 spin_unlock_irqrestore(&oh
->_lock
, flags
);
3068 * omap_hwmod_get_context_loss_count - get lost context count
3069 * @oh: struct omap_hwmod *
3071 * Query the powerdomain of of @oh to get the context loss
3072 * count for this device.
3074 * Returns the context loss count of the powerdomain assocated with @oh
3075 * upon success, or zero if no powerdomain exists for @oh.
3077 int omap_hwmod_get_context_loss_count(struct omap_hwmod
*oh
)
3079 struct powerdomain
*pwrdm
;
3082 pwrdm
= omap_hwmod_get_pwrdm(oh
);
3084 ret
= pwrdm_get_context_loss_count(pwrdm
);
3090 * omap_hwmod_no_setup_reset - prevent a hwmod from being reset upon setup
3091 * @oh: struct omap_hwmod *
3093 * Prevent the hwmod @oh from being reset during the setup process.
3094 * Intended for use by board-*.c files on boards with devices that
3095 * cannot tolerate being reset. Must be called before the hwmod has
3096 * been set up. Returns 0 upon success or negative error code upon
3099 int omap_hwmod_no_setup_reset(struct omap_hwmod
*oh
)
3104 if (oh
->_state
!= _HWMOD_STATE_REGISTERED
) {
3105 pr_err("omap_hwmod: %s: cannot prevent setup reset; in wrong state\n",
3110 oh
->flags
|= HWMOD_INIT_NO_RESET
;
3116 * omap_hwmod_pad_route_irq - route an I/O pad wakeup to a particular MPU IRQ
3117 * @oh: struct omap_hwmod * containing hwmod mux entries
3118 * @pad_idx: array index in oh->mux of the hwmod mux entry to route wakeup
3119 * @irq_idx: the hwmod mpu_irqs array index of the IRQ to trigger on wakeup
3121 * When an I/O pad wakeup arrives for the dynamic or wakeup hwmod mux
3122 * entry number @pad_idx for the hwmod @oh, trigger the interrupt
3123 * service routine for the hwmod's mpu_irqs array index @irq_idx. If
3124 * this function is not called for a given pad_idx, then the ISR
3125 * associated with @oh's first MPU IRQ will be triggered when an I/O
3126 * pad wakeup occurs on that pad. Note that @pad_idx is the index of
3127 * the _dynamic or wakeup_ entry: if there are other entries not
3128 * marked with OMAP_DEVICE_PAD_WAKEUP or OMAP_DEVICE_PAD_REMUX, these
3129 * entries are NOT COUNTED in the dynamic pad index. This function
3130 * must be called separately for each pad that requires its interrupt
3131 * to be re-routed this way. Returns -EINVAL if there is an argument
3132 * problem or if @oh does not have hwmod mux entries or MPU IRQs;
3133 * returns -ENOMEM if memory cannot be allocated; or 0 upon success.
3135 * XXX This function interface is fragile. Rather than using array
3136 * indexes, which are subject to unpredictable change, it should be
3137 * using hwmod IRQ names, and some other stable key for the hwmod mux
3140 int omap_hwmod_pad_route_irq(struct omap_hwmod
*oh
, int pad_idx
, int irq_idx
)
3146 if (!oh
|| !oh
->mux
|| !oh
->mpu_irqs
|| pad_idx
< 0 ||
3147 pad_idx
>= oh
->mux
->nr_pads_dynamic
)
3150 /* Check the number of available mpu_irqs */
3151 for (nr_irqs
= 0; oh
->mpu_irqs
[nr_irqs
].irq
>= 0; nr_irqs
++)
3154 if (irq_idx
>= nr_irqs
)
3157 if (!oh
->mux
->irqs
) {
3158 /* XXX What frees this? */
3159 oh
->mux
->irqs
= kzalloc(sizeof(int) * oh
->mux
->nr_pads_dynamic
,
3164 oh
->mux
->irqs
[pad_idx
] = irq_idx
;