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-rw-r--r--arch/arm/mach-omap2/Makefile2
-rw-r--r--arch/arm/mach-omap2/omap_hwmod.c1555
-rw-r--r--arch/arm/plat-omap/include/mach/omap_hwmod.h447
3 files changed, 2003 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 59d730fa77e5..8cb16777661a 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -5,7 +5,7 @@
5# Common support 5# Common support
6obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o 6obj-y := id.o io.o control.o mux.o devices.o serial.o gpmc.o timer-gp.o
7 7
8omap-2-3-common = irq.o sdrc.o 8omap-2-3-common = irq.o sdrc.o omap_hwmod.o
9prcm-common = prcm.o powerdomain.o 9prcm-common = prcm.o powerdomain.o
10clock-common = clock.o clockdomain.o 10clock-common = clock.o clockdomain.o
11 11
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
new file mode 100644
index 000000000000..3b10ad6c47d3
--- /dev/null
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -0,0 +1,1555 @@
1/*
2 * omap_hwmod implementation for OMAP2/3/4
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Paul Walmsley
6 * With fixes and testing from Kevin Hilman
7 *
8 * Created in collaboration with (alphabetical order): Benoit Cousson,
9 * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
10 * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 *
16 * This code manages "OMAP modules" (on-chip devices) and their
17 * integration with Linux device driver and bus code.
18 *
19 * References:
20 * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
21 * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
22 * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
23 * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
24 * - Open Core Protocol Specification 2.2
25 *
26 * To do:
27 * - pin mux handling
28 * - handle IO mapping
29 * - bus throughput & module latency measurement code
30 *
31 * XXX add tests at the beginning of each function to ensure the hwmod is
32 * in the appropriate state
33 * XXX error return values should be checked to ensure that they are
34 * appropriate
35 */
36#undef DEBUG
37
38#include <linux/kernel.h>
39#include <linux/errno.h>
40#include <linux/io.h>
41#include <linux/clk.h>
42#include <linux/delay.h>
43#include <linux/err.h>
44#include <linux/list.h>
45#include <linux/mutex.h>
46#include <linux/bootmem.h>
47
48#include <mach/cpu.h>
49#include <mach/clockdomain.h>
50#include <mach/powerdomain.h>
51#include <mach/clock.h>
52#include <mach/omap_hwmod.h>
53
54#include "cm.h"
55
56/* Maximum microseconds to wait for OMAP module to reset */
57#define MAX_MODULE_RESET_WAIT 10000
58
59/* Name of the OMAP hwmod for the MPU */
60#define MPU_INITIATOR_NAME "mpu_hwmod"
61
62/* omap_hwmod_list contains all registered struct omap_hwmods */
63static LIST_HEAD(omap_hwmod_list);
64
65static DEFINE_MUTEX(omap_hwmod_mutex);
66
67/* mpu_oh: used to add/remove MPU initiator from sleepdep list */
68static struct omap_hwmod *mpu_oh;
69
70/* inited: 0 if omap_hwmod_init() has not yet been called; 1 otherwise */
71static u8 inited;
72
73
74/* Private functions */
75
76/**
77 * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy
78 * @oh: struct omap_hwmod *
79 *
80 * Load the current value of the hwmod OCP_SYSCONFIG register into the
81 * struct omap_hwmod for later use. Returns -EINVAL if the hwmod has no
82 * OCP_SYSCONFIG register or 0 upon success.
83 */
84static int _update_sysc_cache(struct omap_hwmod *oh)
85{
86 if (!oh->sysconfig) {
87 WARN(!oh->sysconfig, "omap_hwmod: %s: cannot read "
88 "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
89 return -EINVAL;
90 }
91
92 /* XXX ensure module interface clock is up */
93
94 oh->_sysc_cache = omap_hwmod_readl(oh, oh->sysconfig->sysc_offs);
95
96 oh->_int_flags |= _HWMOD_SYSCONFIG_LOADED;
97
98 return 0;
99}
100
101/**
102 * _write_sysconfig - write a value to the module's OCP_SYSCONFIG register
103 * @v: OCP_SYSCONFIG value to write
104 * @oh: struct omap_hwmod *
105 *
106 * Write @v into the module OCP_SYSCONFIG register, if it has one. No
107 * return value.
108 */
109static void _write_sysconfig(u32 v, struct omap_hwmod *oh)
110{
111 if (!oh->sysconfig) {
112 WARN(!oh->sysconfig, "omap_hwmod: %s: cannot write "
113 "OCP_SYSCONFIG: not defined on hwmod\n", oh->name);
114 return;
115 }
116
117 /* XXX ensure module interface clock is up */
118
119 if (oh->_sysc_cache != v) {
120 oh->_sysc_cache = v;
121 omap_hwmod_writel(v, oh, oh->sysconfig->sysc_offs);
122 }
123}
124
125/**
126 * _set_master_standbymode: set the OCP_SYSCONFIG MIDLEMODE field in @v
127 * @oh: struct omap_hwmod *
128 * @standbymode: MIDLEMODE field bits
129 * @v: pointer to register contents to modify
130 *
131 * Update the master standby mode bits in @v to be @standbymode for
132 * the @oh hwmod. Does not write to the hardware. Returns -EINVAL
133 * upon error or 0 upon success.
134 */
135static int _set_master_standbymode(struct omap_hwmod *oh, u8 standbymode,
136 u32 *v)
137{
138 if (!oh->sysconfig ||
139 !(oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE))
140 return -EINVAL;
141
142 *v &= ~SYSC_MIDLEMODE_MASK;
143 *v |= __ffs(standbymode) << SYSC_MIDLEMODE_SHIFT;
144
145 return 0;
146}
147
148/**
149 * _set_slave_idlemode: set the OCP_SYSCONFIG SIDLEMODE field in @v
150 * @oh: struct omap_hwmod *
151 * @idlemode: SIDLEMODE field bits
152 * @v: pointer to register contents to modify
153 *
154 * Update the slave idle mode bits in @v to be @idlemode for the @oh
155 * hwmod. Does not write to the hardware. Returns -EINVAL upon error
156 * or 0 upon success.
157 */
158static int _set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode, u32 *v)
159{
160 if (!oh->sysconfig ||
161 !(oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE))
162 return -EINVAL;
163
164 *v &= ~SYSC_SIDLEMODE_MASK;
165 *v |= __ffs(idlemode) << SYSC_SIDLEMODE_SHIFT;
166
167 return 0;
168}
169
170/**
171 * _set_clockactivity: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
172 * @oh: struct omap_hwmod *
173 * @clockact: CLOCKACTIVITY field bits
174 * @v: pointer to register contents to modify
175 *
176 * Update the clockactivity mode bits in @v to be @clockact for the
177 * @oh hwmod. Used for additional powersaving on some modules. Does
178 * not write to the hardware. Returns -EINVAL upon error or 0 upon
179 * success.
180 */
181static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v)
182{
183 if (!oh->sysconfig ||
184 !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
185 return -EINVAL;
186
187 *v &= ~SYSC_CLOCKACTIVITY_MASK;
188 *v |= clockact << SYSC_CLOCKACTIVITY_SHIFT;
189
190 return 0;
191}
192
193/**
194 * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v
195 * @oh: struct omap_hwmod *
196 * @v: pointer to register contents to modify
197 *
198 * Set the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon
199 * error or 0 upon success.
200 */
201static int _set_softreset(struct omap_hwmod *oh, u32 *v)
202{
203 if (!oh->sysconfig ||
204 !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET))
205 return -EINVAL;
206
207 *v |= SYSC_SOFTRESET_MASK;
208
209 return 0;
210}
211
212/**
213 * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
214 * @oh: struct omap_hwmod *
215 *
216 * Allow the hardware module @oh to send wakeups. Returns -EINVAL
217 * upon error or 0 upon success.
218 */
219static int _enable_wakeup(struct omap_hwmod *oh)
220{
221 u32 v;
222
223 if (!oh->sysconfig ||
224 !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
225 return -EINVAL;
226
227 v = oh->_sysc_cache;
228 v |= SYSC_ENAWAKEUP_MASK;
229 _write_sysconfig(v, oh);
230
231 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
232
233 oh->_int_flags |= _HWMOD_WAKEUP_ENABLED;
234
235 return 0;
236}
237
238/**
239 * _disable_wakeup: clear OCP_SYSCONFIG.ENAWAKEUP bit in the hardware
240 * @oh: struct omap_hwmod *
241 *
242 * Prevent the hardware module @oh to send wakeups. Returns -EINVAL
243 * upon error or 0 upon success.
244 */
245static int _disable_wakeup(struct omap_hwmod *oh)
246{
247 u32 v;
248
249 if (!oh->sysconfig ||
250 !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
251 return -EINVAL;
252
253 v = oh->_sysc_cache;
254 v &= ~SYSC_ENAWAKEUP_MASK;
255 _write_sysconfig(v, oh);
256
257 /* XXX test pwrdm_get_wken for this hwmod's subsystem */
258
259 oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED;
260
261 return 0;
262}
263
264/**
265 * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active
266 * @oh: struct omap_hwmod *
267 *
268 * Prevent the hardware module @oh from entering idle while the
269 * hardare module initiator @init_oh is active. Useful when a module
270 * will be accessed by a particular initiator (e.g., if a module will
271 * be accessed by the IVA, there should be a sleepdep between the IVA
272 * initiator and the module). Only applies to modules in smart-idle
273 * mode. Returns -EINVAL upon error or passes along
274 * pwrdm_add_sleepdep() value upon success.
275 */
276static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
277{
278 if (!oh->_clk)
279 return -EINVAL;
280
281 return pwrdm_add_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
282 init_oh->_clk->clkdm->pwrdm.ptr);
283}
284
285/**
286 * _del_initiator_dep: allow @oh to smart-idle even if @init_oh is active
287 * @oh: struct omap_hwmod *
288 *
289 * Allow the hardware module @oh to enter idle while the hardare
290 * module initiator @init_oh is active. Useful when a module will not
291 * be accessed by a particular initiator (e.g., if a module will not
292 * be accessed by the IVA, there should be no sleepdep between the IVA
293 * initiator and the module). Only applies to modules in smart-idle
294 * mode. Returns -EINVAL upon error or passes along
295 * pwrdm_add_sleepdep() value upon success.
296 */
297static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh)
298{
299 if (!oh->_clk)
300 return -EINVAL;
301
302 return pwrdm_del_sleepdep(oh->_clk->clkdm->pwrdm.ptr,
303 init_oh->_clk->clkdm->pwrdm.ptr);
304}
305
306/**
307 * _init_main_clk - get a struct clk * for the the hwmod's main functional clk
308 * @oh: struct omap_hwmod *
309 *
310 * Called from _init_clocks(). Populates the @oh _clk (main
311 * functional clock pointer) if a main_clk is present. Returns 0 on
312 * success or -EINVAL on error.
313 */
314static int _init_main_clk(struct omap_hwmod *oh)
315{
316 struct clk *c;
317 int ret = 0;
318
319 if (!oh->clkdev_con_id)
320 return 0;
321
322 c = clk_get_sys(oh->clkdev_dev_id, oh->clkdev_con_id);
323 WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get main_clk %s.%s\n",
324 oh->name, oh->clkdev_dev_id, oh->clkdev_con_id);
325 if (IS_ERR(c))
326 ret = -EINVAL;
327 oh->_clk = c;
328
329 return ret;
330}
331
332/**
333 * _init_interface_clk - get a struct clk * for the the hwmod's interface clks
334 * @oh: struct omap_hwmod *
335 *
336 * Called from _init_clocks(). Populates the @oh OCP slave interface
337 * clock pointers. Returns 0 on success or -EINVAL on error.
338 */
339static int _init_interface_clks(struct omap_hwmod *oh)
340{
341 struct omap_hwmod_ocp_if *os;
342 struct clk *c;
343 int i;
344 int ret = 0;
345
346 if (oh->slaves_cnt == 0)
347 return 0;
348
349 for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
350 if (!os->clkdev_con_id)
351 continue;
352
353 c = clk_get_sys(os->clkdev_dev_id, os->clkdev_con_id);
354 WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get "
355 "interface_clk %s.%s\n", oh->name,
356 os->clkdev_dev_id, os->clkdev_con_id);
357 if (IS_ERR(c))
358 ret = -EINVAL;
359 os->_clk = c;
360 }
361
362 return ret;
363}
364
365/**
366 * _init_opt_clk - get a struct clk * for the the hwmod's optional clocks
367 * @oh: struct omap_hwmod *
368 *
369 * Called from _init_clocks(). Populates the @oh omap_hwmod_opt_clk
370 * clock pointers. Returns 0 on success or -EINVAL on error.
371 */
372static int _init_opt_clks(struct omap_hwmod *oh)
373{
374 struct omap_hwmod_opt_clk *oc;
375 struct clk *c;
376 int i;
377 int ret = 0;
378
379 for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) {
380 c = clk_get_sys(oc->clkdev_dev_id, oc->clkdev_con_id);
381 WARN(IS_ERR(c), "omap_hwmod: %s: cannot clk_get opt_clk "
382 "%s.%s\n", oh->name, oc->clkdev_dev_id,
383 oc->clkdev_con_id);
384 if (IS_ERR(c))
385 ret = -EINVAL;
386 oc->_clk = c;
387 }
388
389 return ret;
390}
391
392/**
393 * _enable_clocks - enable hwmod main clock and interface clocks
394 * @oh: struct omap_hwmod *
395 *
396 * Enables all clocks necessary for register reads and writes to succeed
397 * on the hwmod @oh. Returns 0.
398 */
399static int _enable_clocks(struct omap_hwmod *oh)
400{
401 struct omap_hwmod_ocp_if *os;
402 int i;
403
404 pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name);
405
406 if (oh->_clk && !IS_ERR(oh->_clk))
407 clk_enable(oh->_clk);
408
409 if (oh->slaves_cnt > 0) {
410 for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
411 struct clk *c = os->_clk;
412
413 if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE))
414 clk_enable(c);
415 }
416 }
417
418 /* The opt clocks are controlled by the device driver. */
419
420 return 0;
421}
422
423/**
424 * _disable_clocks - disable hwmod main clock and interface clocks
425 * @oh: struct omap_hwmod *
426 *
427 * Disables the hwmod @oh main functional and interface clocks. Returns 0.
428 */
429static int _disable_clocks(struct omap_hwmod *oh)
430{
431 struct omap_hwmod_ocp_if *os;
432 int i;
433
434 pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name);
435
436 if (oh->_clk && !IS_ERR(oh->_clk))
437 clk_disable(oh->_clk);
438
439 if (oh->slaves_cnt > 0) {
440 for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
441 struct clk *c = os->_clk;
442
443 if (c && !IS_ERR(c) && (os->flags & OCPIF_SWSUP_IDLE))
444 clk_disable(c);
445 }
446 }
447
448 /* The opt clocks are controlled by the device driver. */
449
450 return 0;
451}
452
453/**
454 * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use
455 * @oh: struct omap_hwmod *
456 *
457 * Returns the array index of the OCP slave port that the MPU
458 * addresses the device on, or -EINVAL upon error or not found.
459 */
460static int _find_mpu_port_index(struct omap_hwmod *oh)
461{
462 struct omap_hwmod_ocp_if *os;
463 int i;
464 int found = 0;
465
466 if (!oh || oh->slaves_cnt == 0)
467 return -EINVAL;
468
469 for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
470 if (os->user & OCP_USER_MPU) {
471 found = 1;
472 break;
473 }
474 }
475
476 if (found)
477 pr_debug("omap_hwmod: %s: MPU OCP slave port ID %d\n",
478 oh->name, i);
479 else
480 pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n",
481 oh->name);
482
483 return (found) ? i : -EINVAL;
484}
485
486/**
487 * _find_mpu_rt_base - find hwmod register target base addr accessible by MPU
488 * @oh: struct omap_hwmod *
489 *
490 * Return the virtual address of the base of the register target of
491 * device @oh, or NULL on error.
492 */
493static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
494{
495 struct omap_hwmod_ocp_if *os;
496 struct omap_hwmod_addr_space *mem;
497 int i;
498 int found = 0;
499
500 if (!oh || oh->slaves_cnt == 0)
501 return NULL;
502
503 os = *oh->slaves + index;
504
505 for (i = 0, mem = os->addr; i < os->addr_cnt; i++, mem++) {
506 if (mem->flags & ADDR_TYPE_RT) {
507 found = 1;
508 break;
509 }
510 }
511
512 /* XXX use ioremap() instead? */
513
514 if (found)
515 pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
516 oh->name, OMAP2_IO_ADDRESS(mem->pa_start));
517 else
518 pr_debug("omap_hwmod: %s: no MPU register target found\n",
519 oh->name);
520
521 return (found) ? OMAP2_IO_ADDRESS(mem->pa_start) : NULL;
522}
523
524/**
525 * _sysc_enable - try to bring a module out of idle via OCP_SYSCONFIG
526 * @oh: struct omap_hwmod *
527 *
528 * If module is marked as SWSUP_SIDLE, force the module out of slave
529 * idle; otherwise, configure it for smart-idle. If module is marked
530 * as SWSUP_MSUSPEND, force the module out of master standby;
531 * otherwise, configure it for smart-standby. No return value.
532 */
533static void _sysc_enable(struct omap_hwmod *oh)
534{
535 u8 idlemode;
536 u32 v;
537
538 if (!oh->sysconfig)
539 return;
540
541 v = oh->_sysc_cache;
542
543 if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) {
544 idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ?
545 HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
546 _set_slave_idlemode(oh, idlemode, &v);
547 }
548
549 if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) {
550 idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
551 HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
552 _set_master_standbymode(oh, idlemode, &v);
553 }
554
555 /* XXX OCP AUTOIDLE bit? */
556
557 if (oh->flags & HWMOD_SET_DEFAULT_CLOCKACT &&
558 oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY)
559 _set_clockactivity(oh, oh->sysconfig->clockact, &v);
560
561 _write_sysconfig(v, oh);
562}
563
564/**
565 * _sysc_idle - try to put a module into idle via OCP_SYSCONFIG
566 * @oh: struct omap_hwmod *
567 *
568 * If module is marked as SWSUP_SIDLE, force the module into slave
569 * idle; otherwise, configure it for smart-idle. If module is marked
570 * as SWSUP_MSUSPEND, force the module into master standby; otherwise,
571 * configure it for smart-standby. No return value.
572 */
573static void _sysc_idle(struct omap_hwmod *oh)
574{
575 u8 idlemode;
576 u32 v;
577
578 if (!oh->sysconfig)
579 return;
580
581 v = oh->_sysc_cache;
582
583 if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE) {
584 idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ?
585 HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART;
586 _set_slave_idlemode(oh, idlemode, &v);
587 }
588
589 if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE) {
590 idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
591 HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART;
592 _set_master_standbymode(oh, idlemode, &v);
593 }
594
595 _write_sysconfig(v, oh);
596}
597
598/**
599 * _sysc_shutdown - force a module into idle via OCP_SYSCONFIG
600 * @oh: struct omap_hwmod *
601 *
602 * Force the module into slave idle and master suspend. No return
603 * value.
604 */
605static void _sysc_shutdown(struct omap_hwmod *oh)
606{
607 u32 v;
608
609 if (!oh->sysconfig)
610 return;
611
612 v = oh->_sysc_cache;
613
614 if (oh->sysconfig->sysc_flags & SYSC_HAS_SIDLEMODE)
615 _set_slave_idlemode(oh, HWMOD_IDLEMODE_FORCE, &v);
616
617 if (oh->sysconfig->sysc_flags & SYSC_HAS_MIDLEMODE)
618 _set_master_standbymode(oh, HWMOD_IDLEMODE_FORCE, &v);
619
620 /* XXX clear OCP AUTOIDLE bit? */
621
622 _write_sysconfig(v, oh);
623}
624
625/**
626 * _lookup - find an omap_hwmod by name
627 * @name: find an omap_hwmod by name
628 *
629 * Return a pointer to an omap_hwmod by name, or NULL if not found.
630 * Caller must hold omap_hwmod_mutex.
631 */
632static struct omap_hwmod *_lookup(const char *name)
633{
634 struct omap_hwmod *oh, *temp_oh;
635
636 oh = NULL;
637
638 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
639 if (!strcmp(name, temp_oh->name)) {
640 oh = temp_oh;
641 break;
642 }
643 }
644
645 return oh;
646}
647
648/**
649 * _init_clocks - clk_get() all clocks associated with this hwmod
650 * @oh: struct omap_hwmod *
651 *
652 * Called by omap_hwmod_late_init() (after omap2_clk_init()).
653 * Resolves all clock names embedded in the hwmod. Must be called
654 * with omap_hwmod_mutex held. Returns -EINVAL if the omap_hwmod
655 * has not yet been registered or if the clocks have already been
656 * initialized, 0 on success, or a non-zero error on failure.
657 */
658static int _init_clocks(struct omap_hwmod *oh)
659{
660 int ret = 0;
661
662 if (!oh || (oh->_state != _HWMOD_STATE_REGISTERED))
663 return -EINVAL;
664
665 pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name);
666
667 ret |= _init_main_clk(oh);
668 ret |= _init_interface_clks(oh);
669 ret |= _init_opt_clks(oh);
670
671 oh->_state = _HWMOD_STATE_CLKS_INITED;
672
673 return ret;
674}
675
676/**
677 * _wait_target_ready - wait for a module to leave slave idle
678 * @oh: struct omap_hwmod *
679 *
680 * Wait for a module @oh to leave slave idle. Returns 0 if the module
681 * does not have an IDLEST bit or if the module successfully leaves
682 * slave idle; otherwise, pass along the return value of the
683 * appropriate *_cm_wait_module_ready() function.
684 */
685static int _wait_target_ready(struct omap_hwmod *oh)
686{
687 struct omap_hwmod_ocp_if *os;
688 int ret;
689
690 if (!oh)
691 return -EINVAL;
692
693 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
694 return 0;
695
696 os = *oh->slaves + oh->_mpu_port_index;
697
698 if (!(os->flags & OCPIF_HAS_IDLEST))
699 return 0;
700
701 /* XXX check module SIDLEMODE */
702
703 /* XXX check clock enable states */
704
705 if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
706 ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs,
707 oh->prcm.omap2.idlest_reg_id,
708 oh->prcm.omap2.idlest_idle_bit);
709#if 0
710 } else if (cpu_is_omap44xx()) {
711 ret = omap4_cm_wait_module_ready(oh->prcm.omap4.module_offs,
712 oh->prcm.omap4.device_offs);
713#endif
714 } else {
715 BUG();
716 };
717
718 return ret;
719}
720
721/**
722 * _reset - reset an omap_hwmod
723 * @oh: struct omap_hwmod *
724 *
725 * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be
726 * enabled for this to work. Must be called with omap_hwmod_mutex
727 * held. Returns -EINVAL if the hwmod cannot be reset this way or if
728 * the hwmod is in the wrong state, -ETIMEDOUT if the module did not
729 * reset in time, or 0 upon success.
730 */
731static int _reset(struct omap_hwmod *oh)
732{
733 u32 r, v;
734 int c;
735
736 if (!oh->sysconfig ||
737 !(oh->sysconfig->sysc_flags & SYSC_HAS_SOFTRESET) ||
738 (oh->sysconfig->sysc_flags & SYSS_MISSING))
739 return -EINVAL;
740
741 /* clocks must be on for this operation */
742 if (oh->_state != _HWMOD_STATE_ENABLED) {
743 WARN(1, "omap_hwmod: %s: reset can only be entered from "
744 "enabled state\n", oh->name);
745 return -EINVAL;
746 }
747
748 pr_debug("omap_hwmod: %s: resetting\n", oh->name);
749
750 v = oh->_sysc_cache;
751 r = _set_softreset(oh, &v);
752 if (r)
753 return r;
754 _write_sysconfig(v, oh);
755
756 c = 0;
757 while (c < MAX_MODULE_RESET_WAIT &&
758 !(omap_hwmod_readl(oh, oh->sysconfig->syss_offs) &
759 SYSS_RESETDONE_MASK)) {
760 udelay(1);
761 c++;
762 }
763
764 if (c == MAX_MODULE_RESET_WAIT)
765 WARN(1, "omap_hwmod: %s: failed to reset in %d usec\n",
766 oh->name, MAX_MODULE_RESET_WAIT);
767 else
768 pr_debug("omap_hwmod: %s: reset in %d usec\n", oh->name,
769 MAX_MODULE_RESET_WAIT);
770
771 /*
772 * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from
773 * _wait_target_ready() or _reset()
774 */
775
776 return (c == MAX_MODULE_RESET_WAIT) ? -ETIMEDOUT : 0;
777}
778
779/**
780 * _enable - enable an omap_hwmod
781 * @oh: struct omap_hwmod *
782 *
783 * Enables an omap_hwmod @oh such that the MPU can access the hwmod's
784 * register target. Must be called with omap_hwmod_mutex held.
785 * Returns -EINVAL if the hwmod is in the wrong state or passes along
786 * the return value of _wait_target_ready().
787 */
788static int _enable(struct omap_hwmod *oh)
789{
790 int r;
791
792 if (oh->_state != _HWMOD_STATE_INITIALIZED &&
793 oh->_state != _HWMOD_STATE_IDLE &&
794 oh->_state != _HWMOD_STATE_DISABLED) {
795 WARN(1, "omap_hwmod: %s: enabled state can only be entered "
796 "from initialized, idle, or disabled state\n", oh->name);
797 return -EINVAL;
798 }
799
800 pr_debug("omap_hwmod: %s: enabling\n", oh->name);
801
802 /* XXX mux balls */
803
804 _add_initiator_dep(oh, mpu_oh);
805 _enable_clocks(oh);
806
807 if (oh->sysconfig) {
808 if (!(oh->_int_flags & _HWMOD_SYSCONFIG_LOADED))
809 _update_sysc_cache(oh);
810 _sysc_enable(oh);
811 }
812
813 r = _wait_target_ready(oh);
814 if (!r)
815 oh->_state = _HWMOD_STATE_ENABLED;
816
817 return r;
818}
819
820/**
821 * _idle - idle an omap_hwmod
822 * @oh: struct omap_hwmod *
823 *
824 * Idles an omap_hwmod @oh. This should be called once the hwmod has
825 * no further work. Returns -EINVAL if the hwmod is in the wrong
826 * state or returns 0.
827 */
828static int _idle(struct omap_hwmod *oh)
829{
830 if (oh->_state != _HWMOD_STATE_ENABLED) {
831 WARN(1, "omap_hwmod: %s: idle state can only be entered from "
832 "enabled state\n", oh->name);
833 return -EINVAL;
834 }
835
836 pr_debug("omap_hwmod: %s: idling\n", oh->name);
837
838 if (oh->sysconfig)
839 _sysc_idle(oh);
840 _del_initiator_dep(oh, mpu_oh);
841 _disable_clocks(oh);
842
843 oh->_state = _HWMOD_STATE_IDLE;
844
845 return 0;
846}
847
848/**
849 * _shutdown - shutdown an omap_hwmod
850 * @oh: struct omap_hwmod *
851 *
852 * Shut down an omap_hwmod @oh. This should be called when the driver
853 * used for the hwmod is removed or unloaded or if the driver is not
854 * used by the system. Returns -EINVAL if the hwmod is in the wrong
855 * state or returns 0.
856 */
857static int _shutdown(struct omap_hwmod *oh)
858{
859 if (oh->_state != _HWMOD_STATE_IDLE &&
860 oh->_state != _HWMOD_STATE_ENABLED) {
861 WARN(1, "omap_hwmod: %s: disabled state can only be entered "
862 "from idle, or enabled state\n", oh->name);
863 return -EINVAL;
864 }
865
866 pr_debug("omap_hwmod: %s: disabling\n", oh->name);
867
868 if (oh->sysconfig)
869 _sysc_shutdown(oh);
870 _del_initiator_dep(oh, mpu_oh);
871 /* XXX what about the other system initiators here? DMA, tesla, d2d */
872 _disable_clocks(oh);
873 /* XXX Should this code also force-disable the optional clocks? */
874
875 /* XXX mux any associated balls to safe mode */
876
877 oh->_state = _HWMOD_STATE_DISABLED;
878
879 return 0;
880}
881
882/**
883 * _write_clockact_lock - set the module's clockactivity bits
884 * @oh: struct omap_hwmod *
885 * @clockact: CLOCKACTIVITY field bits
886 *
887 * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh
888 * OCP_SYSCONFIG register. Returns -EINVAL if the hwmod is in the
889 * wrong state or returns 0.
890 */
891static int _write_clockact_lock(struct omap_hwmod *oh, u8 clockact)
892{
893 u32 v;
894
895 if (!oh->sysconfig ||
896 !(oh->sysconfig->sysc_flags & SYSC_HAS_CLOCKACTIVITY))
897 return -EINVAL;
898
899 mutex_lock(&omap_hwmod_mutex);
900 v = oh->_sysc_cache;
901 _set_clockactivity(oh, clockact, &v);
902 _write_sysconfig(v, oh);
903 mutex_unlock(&omap_hwmod_mutex);
904
905 return 0;
906}
907
908
909/**
910 * _setup - do initial configuration of omap_hwmod
911 * @oh: struct omap_hwmod *
912 *
913 * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh
914 * OCP_SYSCONFIG register. Must be called with omap_hwmod_mutex
915 * held. Returns -EINVAL if the hwmod is in the wrong state or returns
916 * 0.
917 */
918static int _setup(struct omap_hwmod *oh)
919{
920 struct omap_hwmod_ocp_if *os;
921 int i;
922
923 if (!oh)
924 return -EINVAL;
925
926 /* Set iclk autoidle mode */
927 if (oh->slaves_cnt > 0) {
928 for (i = 0, os = *oh->slaves; i < oh->slaves_cnt; i++, os++) {
929 struct clk *c = os->_clk;
930
931 if (!c || IS_ERR(c))
932 continue;
933
934 if (os->flags & OCPIF_SWSUP_IDLE) {
935 /* XXX omap_iclk_deny_idle(c); */
936 } else {
937 /* XXX omap_iclk_allow_idle(c); */
938 clk_enable(c);
939 }
940 }
941 }
942
943 oh->_state = _HWMOD_STATE_INITIALIZED;
944
945 _enable(oh);
946
947 if (!(oh->flags & HWMOD_INIT_NO_RESET))
948 _reset(oh);
949
950 /* XXX OCP AUTOIDLE bit? */
951 /* XXX OCP ENAWAKEUP bit? */
952
953 if (!(oh->flags & HWMOD_INIT_NO_IDLE))
954 _idle(oh);
955
956 return 0;
957}
958
959
960
961/* Public functions */
962
963u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs)
964{
965 return __raw_readl(oh->_rt_va + reg_offs);
966}
967
968void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs)
969{
970 __raw_writel(v, oh->_rt_va + reg_offs);
971}
972
973/**
974 * omap_hwmod_register - register a struct omap_hwmod
975 * @oh: struct omap_hwmod *
976 *
977 * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod already
978 * has been registered by the same name; -EINVAL if the omap_hwmod is in the
979 * wrong state, or 0 on success.
980 *
981 * XXX The data should be copied into bootmem, so the original data
982 * should be marked __initdata and freed after init. This would allow
983 * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
984 * that the copy process would be relatively complex due to the large number
985 * of substructures.
986 */
987int omap_hwmod_register(struct omap_hwmod *oh)
988{
989 int ret, ms_id;
990
991 if (!oh || (oh->_state != _HWMOD_STATE_UNKNOWN))
992 return -EINVAL;
993
994 mutex_lock(&omap_hwmod_mutex);
995
996 pr_debug("omap_hwmod: %s: registering\n", oh->name);
997
998 if (_lookup(oh->name)) {
999 ret = -EEXIST;
1000 goto ohr_unlock;
1001 }
1002
1003 ms_id = _find_mpu_port_index(oh);
1004 if (!IS_ERR_VALUE(ms_id)) {
1005 oh->_mpu_port_index = ms_id;
1006 oh->_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
1007 } else {
1008 oh->_int_flags |= _HWMOD_NO_MPU_PORT;
1009 }
1010
1011 list_add_tail(&oh->node, &omap_hwmod_list);
1012
1013 oh->_state = _HWMOD_STATE_REGISTERED;
1014
1015 ret = 0;
1016
1017ohr_unlock:
1018 mutex_unlock(&omap_hwmod_mutex);
1019 return ret;
1020}
1021
1022/**
1023 * omap_hwmod_lookup - look up a registered omap_hwmod by name
1024 * @name: name of the omap_hwmod to look up
1025 *
1026 * Given a @name of an omap_hwmod, return a pointer to the registered
1027 * struct omap_hwmod *, or NULL upon error.
1028 */
1029struct omap_hwmod *omap_hwmod_lookup(const char *name)
1030{
1031 struct omap_hwmod *oh;
1032
1033 if (!name)
1034 return NULL;
1035
1036 mutex_lock(&omap_hwmod_mutex);
1037 oh = _lookup(name);
1038 mutex_unlock(&omap_hwmod_mutex);
1039
1040 return oh;
1041}
1042
1043/**
1044 * omap_hwmod_for_each - call function for each registered omap_hwmod
1045 * @fn: pointer to a callback function
1046 *
1047 * Call @fn for each registered omap_hwmod, passing @data to each
1048 * function. @fn must return 0 for success or any other value for
1049 * failure. If @fn returns non-zero, the iteration across omap_hwmods
1050 * will stop and the non-zero return value will be passed to the
1051 * caller of omap_hwmod_for_each(). @fn is called with
1052 * omap_hwmod_for_each() held.
1053 */
1054int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh))
1055{
1056 struct omap_hwmod *temp_oh;
1057 int ret;
1058
1059 if (!fn)
1060 return -EINVAL;
1061
1062 mutex_lock(&omap_hwmod_mutex);
1063 list_for_each_entry(temp_oh, &omap_hwmod_list, node) {
1064 ret = (*fn)(temp_oh);
1065 if (ret)
1066 break;
1067 }
1068 mutex_unlock(&omap_hwmod_mutex);
1069
1070 return ret;
1071}
1072
1073
1074/**
1075 * omap_hwmod_init - init omap_hwmod code and register hwmods
1076 * @ohs: pointer to an array of omap_hwmods to register
1077 *
1078 * Intended to be called early in boot before the clock framework is
1079 * initialized. If @ohs is not null, will register all omap_hwmods
1080 * listed in @ohs that are valid for this chip. Returns -EINVAL if
1081 * omap_hwmod_init() has already been called or 0 otherwise.
1082 */
1083int omap_hwmod_init(struct omap_hwmod **ohs)
1084{
1085 struct omap_hwmod *oh;
1086 int r;
1087
1088 if (inited)
1089 return -EINVAL;
1090
1091 inited = 1;
1092
1093 if (!ohs)
1094 return 0;
1095
1096 oh = *ohs;
1097 while (oh) {
1098 if (omap_chip_is(oh->omap_chip)) {
1099 r = omap_hwmod_register(oh);
1100 WARN(r, "omap_hwmod: %s: omap_hwmod_register returned "
1101 "%d\n", oh->name, r);
1102 }
1103 oh = *++ohs;
1104 }
1105
1106 return 0;
1107}
1108
1109/**
1110 * omap_hwmod_late_init - do some post-clock framework initialization
1111 *
1112 * Must be called after omap2_clk_init(). Resolves the struct clk names
1113 * to struct clk pointers for each registered omap_hwmod. Also calls
1114 * _setup() on each hwmod. Returns 0.
1115 */
1116int omap_hwmod_late_init(void)
1117{
1118 int r;
1119
1120 /* XXX check return value */
1121 r = omap_hwmod_for_each(_init_clocks);
1122 WARN(r, "omap_hwmod: omap_hwmod_late_init(): _init_clocks failed\n");
1123
1124 mpu_oh = omap_hwmod_lookup(MPU_INITIATOR_NAME);
1125 WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n",
1126 MPU_INITIATOR_NAME);
1127
1128 omap_hwmod_for_each(_setup);
1129
1130 return 0;
1131}
1132
1133/**
1134 * omap_hwmod_unregister - unregister an omap_hwmod
1135 * @oh: struct omap_hwmod *
1136 *
1137 * Unregisters a previously-registered omap_hwmod @oh. There's probably
1138 * no use case for this, so it is likely to be removed in a later version.
1139 *
1140 * XXX Free all of the bootmem-allocated structures here when that is
1141 * implemented. Make it clear that core code is the only code that is
1142 * expected to unregister modules.
1143 */
1144int omap_hwmod_unregister(struct omap_hwmod *oh)
1145{
1146 if (!oh)
1147 return -EINVAL;
1148
1149 pr_debug("omap_hwmod: %s: unregistering\n", oh->name);
1150
1151 mutex_lock(&omap_hwmod_mutex);
1152 list_del(&oh->node);
1153 mutex_unlock(&omap_hwmod_mutex);
1154
1155 return 0;
1156}
1157
1158/**
1159 * omap_hwmod_enable - enable an omap_hwmod
1160 * @oh: struct omap_hwmod *
1161 *
1162 * Enable an omap_hwomd @oh. Intended to be called by omap_device_enable().
1163 * Returns -EINVAL on error or passes along the return value from _enable().
1164 */
1165int omap_hwmod_enable(struct omap_hwmod *oh)
1166{
1167 int r;
1168
1169 if (!oh)
1170 return -EINVAL;
1171
1172 mutex_lock(&omap_hwmod_mutex);
1173 r = _enable(oh);
1174 mutex_unlock(&omap_hwmod_mutex);
1175
1176 return r;
1177}
1178
1179/**
1180 * omap_hwmod_idle - idle an omap_hwmod
1181 * @oh: struct omap_hwmod *
1182 *
1183 * Idle an omap_hwomd @oh. Intended to be called by omap_device_idle().
1184 * Returns -EINVAL on error or passes along the return value from _idle().
1185 */
1186int omap_hwmod_idle(struct omap_hwmod *oh)
1187{
1188 if (!oh)
1189 return -EINVAL;
1190
1191 mutex_lock(&omap_hwmod_mutex);
1192 _idle(oh);
1193 mutex_unlock(&omap_hwmod_mutex);
1194
1195 return 0;
1196}
1197
1198/**
1199 * omap_hwmod_shutdown - shutdown an omap_hwmod
1200 * @oh: struct omap_hwmod *
1201 *
1202 * Shutdown an omap_hwomd @oh. Intended to be called by
1203 * omap_device_shutdown(). Returns -EINVAL on error or passes along
1204 * the return value from _shutdown().
1205 */
1206int omap_hwmod_shutdown(struct omap_hwmod *oh)
1207{
1208 if (!oh)
1209 return -EINVAL;
1210
1211 mutex_lock(&omap_hwmod_mutex);
1212 _shutdown(oh);
1213 mutex_unlock(&omap_hwmod_mutex);
1214
1215 return 0;
1216}
1217
1218/**
1219 * omap_hwmod_enable_clocks - enable main_clk, all interface clocks
1220 * @oh: struct omap_hwmod *oh
1221 *
1222 * Intended to be called by the omap_device code.
1223 */
1224int omap_hwmod_enable_clocks(struct omap_hwmod *oh)
1225{
1226 mutex_lock(&omap_hwmod_mutex);
1227 _enable_clocks(oh);
1228 mutex_unlock(&omap_hwmod_mutex);
1229
1230 return 0;
1231}
1232
1233/**
1234 * omap_hwmod_disable_clocks - disable main_clk, all interface clocks
1235 * @oh: struct omap_hwmod *oh
1236 *
1237 * Intended to be called by the omap_device code.
1238 */
1239int omap_hwmod_disable_clocks(struct omap_hwmod *oh)
1240{
1241 mutex_lock(&omap_hwmod_mutex);
1242 _disable_clocks(oh);
1243 mutex_unlock(&omap_hwmod_mutex);
1244
1245 return 0;
1246}
1247
1248/**
1249 * omap_hwmod_ocp_barrier - wait for posted writes against the hwmod to complete
1250 * @oh: struct omap_hwmod *oh
1251 *
1252 * Intended to be called by drivers and core code when all posted
1253 * writes to a device must complete before continuing further
1254 * execution (for example, after clearing some device IRQSTATUS
1255 * register bits)
1256 *
1257 * XXX what about targets with multiple OCP threads?
1258 */
1259void omap_hwmod_ocp_barrier(struct omap_hwmod *oh)
1260{
1261 BUG_ON(!oh);
1262
1263 if (!oh->sysconfig || !oh->sysconfig->sysc_flags) {
1264 WARN(1, "omap_device: %s: OCP barrier impossible due to "
1265 "device configuration\n", oh->name);
1266 return;
1267 }
1268
1269 /*
1270 * Forces posted writes to complete on the OCP thread handling
1271 * register writes
1272 */
1273 omap_hwmod_readl(oh, oh->sysconfig->sysc_offs);
1274}
1275
1276/**
1277 * omap_hwmod_reset - reset the hwmod
1278 * @oh: struct omap_hwmod *
1279 *
1280 * Under some conditions, a driver may wish to reset the entire device.
1281 * Called from omap_device code. Returns -EINVAL on error or passes along
1282 * the return value from _reset()/_enable().
1283 */
1284int omap_hwmod_reset(struct omap_hwmod *oh)
1285{
1286 int r;
1287
1288 if (!oh || !(oh->_state & _HWMOD_STATE_ENABLED))
1289 return -EINVAL;
1290
1291 mutex_lock(&omap_hwmod_mutex);
1292 r = _reset(oh);
1293 if (!r)
1294 r = _enable(oh);
1295 mutex_unlock(&omap_hwmod_mutex);
1296
1297 return r;
1298}
1299
1300/**
1301 * omap_hwmod_count_resources - count number of struct resources needed by hwmod
1302 * @oh: struct omap_hwmod *
1303 * @res: pointer to the first element of an array of struct resource to fill
1304 *
1305 * Count the number of struct resource array elements necessary to
1306 * contain omap_hwmod @oh resources. Intended to be called by code
1307 * that registers omap_devices. Intended to be used to determine the
1308 * size of a dynamically-allocated struct resource array, before
1309 * calling omap_hwmod_fill_resources(). Returns the number of struct
1310 * resource array elements needed.
1311 *
1312 * XXX This code is not optimized. It could attempt to merge adjacent
1313 * resource IDs.
1314 *
1315 */
1316int omap_hwmod_count_resources(struct omap_hwmod *oh)
1317{
1318 int ret, i;
1319
1320 ret = oh->mpu_irqs_cnt + oh->sdma_chs_cnt;
1321
1322 for (i = 0; i < oh->slaves_cnt; i++)
1323 ret += (*oh->slaves + i)->addr_cnt;
1324
1325 return ret;
1326}
1327
1328/**
1329 * omap_hwmod_fill_resources - fill struct resource array with hwmod data
1330 * @oh: struct omap_hwmod *
1331 * @res: pointer to the first element of an array of struct resource to fill
1332 *
1333 * Fill the struct resource array @res with resource data from the
1334 * omap_hwmod @oh. Intended to be called by code that registers
1335 * omap_devices. See also omap_hwmod_count_resources(). Returns the
1336 * number of array elements filled.
1337 */
1338int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
1339{
1340 int i, j;
1341 int r = 0;
1342
1343 /* For each IRQ, DMA, memory area, fill in array.*/
1344
1345 for (i = 0; i < oh->mpu_irqs_cnt; i++) {
1346 (res + r)->start = *(oh->mpu_irqs + i);
1347 (res + r)->end = *(oh->mpu_irqs + i);
1348 (res + r)->flags = IORESOURCE_IRQ;
1349 r++;
1350 }
1351
1352 for (i = 0; i < oh->sdma_chs_cnt; i++) {
1353 (res + r)->name = (oh->sdma_chs + i)->name;
1354 (res + r)->start = (oh->sdma_chs + i)->dma_ch;
1355 (res + r)->end = (oh->sdma_chs + i)->dma_ch;
1356 (res + r)->flags = IORESOURCE_DMA;
1357 r++;
1358 }
1359
1360 for (i = 0; i < oh->slaves_cnt; i++) {
1361 struct omap_hwmod_ocp_if *os;
1362
1363 os = *oh->slaves + i;
1364
1365 for (j = 0; j < os->addr_cnt; j++) {
1366 (res + r)->start = (os->addr + j)->pa_start;
1367 (res + r)->end = (os->addr + j)->pa_end;
1368 (res + r)->flags = IORESOURCE_MEM;
1369 r++;
1370 }
1371 }
1372
1373 return r;
1374}
1375
1376/**
1377 * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain
1378 * @oh: struct omap_hwmod *
1379 *
1380 * Return the powerdomain pointer associated with the OMAP module
1381 * @oh's main clock. If @oh does not have a main clk, return the
1382 * powerdomain associated with the interface clock associated with the
1383 * module's MPU port. (XXX Perhaps this should use the SDMA port
1384 * instead?) Returns NULL on error, or a struct powerdomain * on
1385 * success.
1386 */
1387struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh)
1388{
1389 struct clk *c;
1390
1391 if (!oh)
1392 return NULL;
1393
1394 if (oh->_clk) {
1395 c = oh->_clk;
1396 } else {
1397 if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
1398 return NULL;
1399 c = oh->slaves[oh->_mpu_port_index]->_clk;
1400 }
1401
1402 return c->clkdm->pwrdm.ptr;
1403
1404}
1405
1406/**
1407 * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh
1408 * @oh: struct omap_hwmod *
1409 * @init_oh: struct omap_hwmod * (initiator)
1410 *
1411 * Add a sleep dependency between the initiator @init_oh and @oh.
1412 * Intended to be called by DSP/Bridge code via platform_data for the
1413 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
1414 * code needs to add/del initiator dependencies dynamically
1415 * before/after accessing a device. Returns the return value from
1416 * _add_initiator_dep().
1417 *
1418 * XXX Keep a usecount in the clockdomain code
1419 */
1420int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
1421 struct omap_hwmod *init_oh)
1422{
1423 return _add_initiator_dep(oh, init_oh);
1424}
1425
1426/*
1427 * XXX what about functions for drivers to save/restore ocp_sysconfig
1428 * for context save/restore operations?
1429 */
1430
1431/**
1432 * omap_hwmod_del_initiator_dep - remove sleepdep from @init_oh to @oh
1433 * @oh: struct omap_hwmod *
1434 * @init_oh: struct omap_hwmod * (initiator)
1435 *
1436 * Remove a sleep dependency between the initiator @init_oh and @oh.
1437 * Intended to be called by DSP/Bridge code via platform_data for the
1438 * DSP case; and by the DMA code in the sDMA case. DMA code, *Bridge
1439 * code needs to add/del initiator dependencies dynamically
1440 * before/after accessing a device. Returns the return value from
1441 * _del_initiator_dep().
1442 *
1443 * XXX Keep a usecount in the clockdomain code
1444 */
1445int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
1446 struct omap_hwmod *init_oh)
1447{
1448 return _del_initiator_dep(oh, init_oh);
1449}
1450
1451/**
1452 * omap_hwmod_set_clockact_none - set clockactivity test to BOTH
1453 * @oh: struct omap_hwmod *
1454 *
1455 * On some modules, this function can affect the wakeup latency vs.
1456 * power consumption balance. Intended to be called by the
1457 * omap_device layer. Passes along the return value from
1458 * _write_clockact_lock().
1459 */
1460int omap_hwmod_set_clockact_both(struct omap_hwmod *oh)
1461{
1462 return _write_clockact_lock(oh, CLOCKACT_TEST_BOTH);
1463}
1464
1465/**
1466 * omap_hwmod_set_clockact_none - set clockactivity test to MAIN
1467 * @oh: struct omap_hwmod *
1468 *
1469 * On some modules, this function can affect the wakeup latency vs.
1470 * power consumption balance. Intended to be called by the
1471 * omap_device layer. Passes along the return value from
1472 * _write_clockact_lock().
1473 */
1474int omap_hwmod_set_clockact_main(struct omap_hwmod *oh)
1475{
1476 return _write_clockact_lock(oh, CLOCKACT_TEST_MAIN);
1477}
1478
1479/**
1480 * omap_hwmod_set_clockact_none - set clockactivity test to ICLK
1481 * @oh: struct omap_hwmod *
1482 *
1483 * On some modules, this function can affect the wakeup latency vs.
1484 * power consumption balance. Intended to be called by the
1485 * omap_device layer. Passes along the return value from
1486 * _write_clockact_lock().
1487 */
1488int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh)
1489{
1490 return _write_clockact_lock(oh, CLOCKACT_TEST_ICLK);
1491}
1492
1493/**
1494 * omap_hwmod_set_clockact_none - set clockactivity test to NONE
1495 * @oh: struct omap_hwmod *
1496 *
1497 * On some modules, this function can affect the wakeup latency vs.
1498 * power consumption balance. Intended to be called by the
1499 * omap_device layer. Passes along the return value from
1500 * _write_clockact_lock().
1501 */
1502int omap_hwmod_set_clockact_none(struct omap_hwmod *oh)
1503{
1504 return _write_clockact_lock(oh, CLOCKACT_TEST_NONE);
1505}
1506
1507/**
1508 * omap_hwmod_enable_wakeup - allow device to wake up the system
1509 * @oh: struct omap_hwmod *
1510 *
1511 * Sets the module OCP socket ENAWAKEUP bit to allow the module to
1512 * send wakeups to the PRCM. Eventually this should sets PRCM wakeup
1513 * registers to cause the PRCM to receive wakeup events from the
1514 * module. Does not set any wakeup routing registers beyond this
1515 * point - if the module is to wake up any other module or subsystem,
1516 * that must be set separately. Called by omap_device code. Returns
1517 * -EINVAL on error or 0 upon success.
1518 */
1519int omap_hwmod_enable_wakeup(struct omap_hwmod *oh)
1520{
1521 if (!oh->sysconfig ||
1522 !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
1523 return -EINVAL;
1524
1525 mutex_lock(&omap_hwmod_mutex);
1526 _enable_wakeup(oh);
1527 mutex_unlock(&omap_hwmod_mutex);
1528
1529 return 0;
1530}
1531
1532/**
1533 * omap_hwmod_disable_wakeup - prevent device from waking the system
1534 * @oh: struct omap_hwmod *
1535 *
1536 * Clears the module OCP socket ENAWAKEUP bit to prevent the module
1537 * from sending wakeups to the PRCM. Eventually this should clear
1538 * PRCM wakeup registers to cause the PRCM to ignore wakeup events
1539 * from the module. Does not set any wakeup routing registers beyond
1540 * this point - if the module is to wake up any other module or
1541 * subsystem, that must be set separately. Called by omap_device
1542 * code. Returns -EINVAL on error or 0 upon success.
1543 */
1544int omap_hwmod_disable_wakeup(struct omap_hwmod *oh)
1545{
1546 if (!oh->sysconfig ||
1547 !(oh->sysconfig->sysc_flags & SYSC_HAS_ENAWAKEUP))
1548 return -EINVAL;
1549
1550 mutex_lock(&omap_hwmod_mutex);
1551 _disable_wakeup(oh);
1552 mutex_unlock(&omap_hwmod_mutex);
1553
1554 return 0;
1555}
diff --git a/arch/arm/plat-omap/include/mach/omap_hwmod.h b/arch/arm/plat-omap/include/mach/omap_hwmod.h
new file mode 100644
index 000000000000..1f79c20e2929
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/omap_hwmod.h
@@ -0,0 +1,447 @@
1/*
2 * omap_hwmod macros, structures
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Paul Walmsley
6 *
7 * Created in collaboration with (alphabetical order): Benoit Cousson,
8 * Kevin Hilman, Tony Lindgren, Rajendra Nayak, Vikram Pandita, Sakari
9 * Poussa, Anand Sawant, Santosh Shilimkar, Richard Woodruff
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * These headers and macros are used to define OMAP on-chip module
16 * data and their integration with other OMAP modules and Linux.
17 *
18 * References:
19 * - OMAP2420 Multimedia Processor Silicon Revision 2.1.1, 2.2 (SWPU064)
20 * - OMAP2430 Multimedia Device POP Silicon Revision 2.1 (SWPU090)
21 * - OMAP34xx Multimedia Device Silicon Revision 3.1 (SWPU108)
22 * - OMAP4430 Multimedia Device Silicon Revision 1.0 (SWPU140)
23 * - Open Core Protocol Specification 2.2
24 *
25 * To do:
26 * - add interconnect error log structures
27 * - add pinmuxing
28 * - init_conn_id_bit (CONNID_BIT_VECTOR)
29 * - implement default hwmod SMS/SDRC flags?
30 *
31 */
32#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
33#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_OMAP_HWMOD_H
34
35#include <linux/kernel.h>
36#include <linux/ioport.h>
37
38#include <mach/cpu.h>
39
40struct omap_device;
41
42/* OCP SYSCONFIG bit shifts/masks */
43#define SYSC_MIDLEMODE_SHIFT 12
44#define SYSC_MIDLEMODE_MASK (0x3 << SYSC_MIDLEMODE_SHIFT)
45#define SYSC_CLOCKACTIVITY_SHIFT 8
46#define SYSC_CLOCKACTIVITY_MASK (0x3 << SYSC_CLOCKACTIVITY_SHIFT)
47#define SYSC_SIDLEMODE_SHIFT 3
48#define SYSC_SIDLEMODE_MASK (0x3 << SYSC_SIDLEMODE_SHIFT)
49#define SYSC_ENAWAKEUP_SHIFT 2
50#define SYSC_ENAWAKEUP_MASK (1 << SYSC_ENAWAKEUP_SHIFT)
51#define SYSC_SOFTRESET_SHIFT 1
52#define SYSC_SOFTRESET_MASK (1 << SYSC_SOFTRESET_SHIFT)
53
54/* OCP SYSSTATUS bit shifts/masks */
55#define SYSS_RESETDONE_SHIFT 0
56#define SYSS_RESETDONE_MASK (1 << SYSS_RESETDONE_SHIFT)
57
58/* Master standby/slave idle mode flags */
59#define HWMOD_IDLEMODE_FORCE (1 << 0)
60#define HWMOD_IDLEMODE_NO (1 << 1)
61#define HWMOD_IDLEMODE_SMART (1 << 2)
62
63
64/**
65 * struct omap_hwmod_dma_info - MPU address space handled by the hwmod
66 * @name: name of the DMA channel (module local name)
67 * @dma_ch: DMA channel ID
68 *
69 * @name should be something short, e.g., "tx" or "rx". It is for use
70 * by platform_get_resource_byname(). It is defined locally to the
71 * hwmod.
72 */
73struct omap_hwmod_dma_info {
74 const char *name;
75 u16 dma_ch;
76};
77
78/**
79 * struct omap_hwmod_opt_clk - optional clocks used by this hwmod
80 * @role: "sys", "32k", "tv", etc -- for use in clk_get()
81 * @clkdev_dev_id: opt clock: clkdev dev_id string
82 * @clkdev_con_id: opt clock: clkdev con_id string
83 * @_clk: pointer to the struct clk (filled in at runtime)
84 *
85 * The module's interface clock and main functional clock should not
86 * be added as optional clocks.
87 */
88struct omap_hwmod_opt_clk {
89 const char *role;
90 const char *clkdev_dev_id;
91 const char *clkdev_con_id;
92 struct clk *_clk;
93};
94
95
96/* omap_hwmod_omap2_firewall.flags bits */
97#define OMAP_FIREWALL_L3 (1 << 0)
98#define OMAP_FIREWALL_L4 (1 << 1)
99
100/**
101 * struct omap_hwmod_omap2_firewall - OMAP2/3 device firewall data
102 * @l3_perm_bit: bit shift for L3_PM_*_PERMISSION_*
103 * @l4_fw_region: L4 firewall region ID
104 * @l4_prot_group: L4 protection group ID
105 * @flags: (see omap_hwmod_omap2_firewall.flags macros above)
106 */
107struct omap_hwmod_omap2_firewall {
108 u8 l3_perm_bit;
109 u8 l4_fw_region;
110 u8 l4_prot_group;
111 u8 flags;
112};
113
114
115/*
116 * omap_hwmod_addr_space.flags bits
117 *
118 * ADDR_MAP_ON_INIT: Map this address space during omap_hwmod init.
119 * ADDR_TYPE_RT: Address space contains module register target data.
120 */
121#define ADDR_MAP_ON_INIT (1 << 0)
122#define ADDR_TYPE_RT (1 << 1)
123
124/**
125 * struct omap_hwmod_addr_space - MPU address space handled by the hwmod
126 * @pa_start: starting physical address
127 * @pa_end: ending physical address
128 * @flags: (see omap_hwmod_addr_space.flags macros above)
129 *
130 * Address space doesn't necessarily follow physical interconnect
131 * structure. GPMC is one example.
132 */
133struct omap_hwmod_addr_space {
134 u32 pa_start;
135 u32 pa_end;
136 u8 flags;
137};
138
139
140/*
141 * omap_hwmod_ocp_if.user bits: these indicate the initiators that use this
142 * interface to interact with the hwmod. Used to add sleep dependencies
143 * when the module is enabled or disabled.
144 */
145#define OCP_USER_MPU (1 << 0)
146#define OCP_USER_SDMA (1 << 1)
147
148/* omap_hwmod_ocp_if.flags bits */
149#define OCPIF_HAS_IDLEST (1 << 0)
150#define OCPIF_SWSUP_IDLE (1 << 1)
151#define OCPIF_CAN_BURST (1 << 2)
152
153/**
154 * struct omap_hwmod_ocp_if - OCP interface data
155 * @master: struct omap_hwmod that initiates OCP transactions on this link
156 * @slave: struct omap_hwmod that responds to OCP transactions on this link
157 * @addr: address space associated with this link
158 * @clkdev_dev_id: interface clock: clkdev dev_id string
159 * @clkdev_con_id: interface clock: clkdev con_id string
160 * @_clk: pointer to the interface struct clk (filled in at runtime)
161 * @fw: interface firewall data
162 * @addr_cnt: ARRAY_SIZE(@addr)
163 * @width: OCP data width
164 * @thread_cnt: number of threads
165 * @max_burst_len: maximum burst length in @width sized words (0 if unlimited)
166 * @user: initiators using this interface (see OCP_USER_* macros above)
167 * @flags: OCP interface flags (see OCPIF_* macros above)
168 *
169 * It may also be useful to add a tag_cnt field for OCP2.x devices.
170 *
171 * Parameter names beginning with an underscore are managed internally by
172 * the omap_hwmod code and should not be set during initialization.
173 */
174struct omap_hwmod_ocp_if {
175 struct omap_hwmod *master;
176 struct omap_hwmod *slave;
177 struct omap_hwmod_addr_space *addr;
178 const char *clkdev_dev_id;
179 const char *clkdev_con_id;
180 struct clk *_clk;
181 union {
182 struct omap_hwmod_omap2_firewall omap2;
183 } fw;
184 u8 addr_cnt;
185 u8 width;
186 u8 thread_cnt;
187 u8 max_burst_len;
188 u8 user;
189 u8 flags;
190};
191
192
193/* Macros for use in struct omap_hwmod_sysconfig */
194
195/* Flags for use in omap_hwmod_sysconfig.idlemodes */
196#define MASTER_STANDBY_SHIFT 2
197#define SLAVE_IDLE_SHIFT 0
198#define SIDLE_FORCE (HWMOD_IDLEMODE_FORCE << SLAVE_IDLE_SHIFT)
199#define SIDLE_NO (HWMOD_IDLEMODE_NO << SLAVE_IDLE_SHIFT)
200#define SIDLE_SMART (HWMOD_IDLEMODE_SMART << SLAVE_IDLE_SHIFT)
201#define MSTANDBY_FORCE (HWMOD_IDLEMODE_FORCE << MASTER_STANDBY_SHIFT)
202#define MSTANDBY_NO (HWMOD_IDLEMODE_NO << MASTER_STANDBY_SHIFT)
203#define MSTANDBY_SMART (HWMOD_IDLEMODE_SMART << MASTER_STANDBY_SHIFT)
204
205/* omap_hwmod_sysconfig.sysc_flags capability flags */
206#define SYSC_HAS_AUTOIDLE (1 << 0)
207#define SYSC_HAS_SOFTRESET (1 << 1)
208#define SYSC_HAS_ENAWAKEUP (1 << 2)
209#define SYSC_HAS_EMUFREE (1 << 3)
210#define SYSC_HAS_CLOCKACTIVITY (1 << 4)
211#define SYSC_HAS_SIDLEMODE (1 << 5)
212#define SYSC_HAS_MIDLEMODE (1 << 6)
213#define SYSS_MISSING (1 << 7)
214
215/* omap_hwmod_sysconfig.clockact flags */
216#define CLOCKACT_TEST_BOTH 0x0
217#define CLOCKACT_TEST_MAIN 0x1
218#define CLOCKACT_TEST_ICLK 0x2
219#define CLOCKACT_TEST_NONE 0x3
220
221/**
222 * struct omap_hwmod_sysconfig - hwmod OCP_SYSCONFIG/OCP_SYSSTATUS data
223 * @rev_offs: IP block revision register offset (from module base addr)
224 * @sysc_offs: OCP_SYSCONFIG register offset (from module base addr)
225 * @syss_offs: OCP_SYSSTATUS register offset (from module base addr)
226 * @idlemodes: One or more of {SIDLE,MSTANDBY}_{OFF,FORCE,SMART}
227 * @sysc_flags: SYS{C,S}_HAS* flags indicating SYSCONFIG bits supported
228 * @clockact: the default value of the module CLOCKACTIVITY bits
229 *
230 * @clockact describes to the module which clocks are likely to be
231 * disabled when the PRCM issues its idle request to the module. Some
232 * modules have separate clockdomains for the interface clock and main
233 * functional clock, and can check whether they should acknowledge the
234 * idle request based on the internal module functionality that has
235 * been associated with the clocks marked in @clockact. This field is
236 * only used if HWMOD_SET_DEFAULT_CLOCKACT is set (see below)
237 *
238 */
239struct omap_hwmod_sysconfig {
240 u16 rev_offs;
241 u16 sysc_offs;
242 u16 syss_offs;
243 u8 idlemodes;
244 u8 sysc_flags;
245 u8 clockact;
246};
247
248/**
249 * struct omap_hwmod_omap2_prcm - OMAP2/3-specific PRCM data
250 * @module_offs: PRCM submodule offset from the start of the PRM/CM
251 * @prcm_reg_id: PRCM register ID (e.g., 3 for CM_AUTOIDLE3)
252 * @module_bit: register bit shift for AUTOIDLE, WKST, WKEN, GRPSEL regs
253 * @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3)
254 * @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit
255 * @idlest_stdby_bit: register bit shift for CM_IDLEST master standby bit
256 *
257 * @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST,
258 * WKEN, GRPSEL registers. In an ideal world, no extra information
259 * would be needed for IDLEST information, but alas, there are some
260 * exceptions, so @idlest_reg_id, @idlest_idle_bit, @idlest_stdby_bit
261 * are needed for the IDLEST registers (c.f. 2430 I2CHS, 3430 USBHOST)
262 */
263struct omap_hwmod_omap2_prcm {
264 s16 module_offs;
265 u8 prcm_reg_id;
266 u8 module_bit;
267 u8 idlest_reg_id;
268 u8 idlest_idle_bit;
269 u8 idlest_stdby_bit;
270};
271
272
273/**
274 * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data
275 * @module_offs: PRCM submodule offset from the start of the PRM/CM1/CM2
276 * @device_offs: device register offset from @module_offs
277 * @submodule_wkdep_bit: bit shift of the WKDEP range
278 */
279struct omap_hwmod_omap4_prcm {
280 u32 module_offs;
281 u16 device_offs;
282 u8 submodule_wkdep_bit;
283};
284
285
286/*
287 * omap_hwmod.flags definitions
288 *
289 * HWMOD_SWSUP_SIDLE: omap_hwmod code should manually bring module in and out
290 * of idle, rather than relying on module smart-idle
291 * HWMOD_SWSUP_MSTDBY: omap_hwmod code should manually bring module in and out
292 * of standby, rather than relying on module smart-standby
293 * HWMOD_INIT_NO_RESET: don't reset this module at boot - important for
294 * SDRAM controller, etc.
295 * HWMOD_INIT_NO_IDLE: don't idle this module at boot - important for SDRAM
296 * controller, etc.
297 * HWMOD_SET_DEFAULT_CLOCKACT: program CLOCKACTIVITY bits at startup
298 */
299#define HWMOD_SWSUP_SIDLE (1 << 0)
300#define HWMOD_SWSUP_MSTANDBY (1 << 1)
301#define HWMOD_INIT_NO_RESET (1 << 2)
302#define HWMOD_INIT_NO_IDLE (1 << 3)
303#define HWMOD_SET_DEFAULT_CLOCKACT (1 << 4)
304
305/*
306 * omap_hwmod._int_flags definitions
307 * These are for internal use only and are managed by the omap_hwmod code.
308 *
309 * _HWMOD_NO_MPU_PORT: no path exists for the MPU to write to this module
310 * _HWMOD_WAKEUP_ENABLED: set when the omap_hwmod code has enabled ENAWAKEUP
311 * _HWMOD_SYSCONFIG_LOADED: set when the OCP_SYSCONFIG value has been cached
312 */
313#define _HWMOD_NO_MPU_PORT (1 << 0)
314#define _HWMOD_WAKEUP_ENABLED (1 << 1)
315#define _HWMOD_SYSCONFIG_LOADED (1 << 2)
316
317/*
318 * omap_hwmod._state definitions
319 *
320 * INITIALIZED: reset (optionally), initialized, enabled, disabled
321 * (optionally)
322 *
323 *
324 */
325#define _HWMOD_STATE_UNKNOWN 0
326#define _HWMOD_STATE_REGISTERED 1
327#define _HWMOD_STATE_CLKS_INITED 2
328#define _HWMOD_STATE_INITIALIZED 3
329#define _HWMOD_STATE_ENABLED 4
330#define _HWMOD_STATE_IDLE 5
331#define _HWMOD_STATE_DISABLED 6
332
333/**
334 * struct omap_hwmod - integration data for OMAP hardware "modules" (IP blocks)
335 * @name: name of the hwmod
336 * @od: struct omap_device currently associated with this hwmod (internal use)
337 * @mpu_irqs: ptr to an array of MPU IRQs (see also mpu_irqs_cnt)
338 * @sdma_chs: ptr to an array of SDMA channel IDs (see also sdma_chs_cnt)
339 * @prcm: PRCM data pertaining to this hwmod
340 * @clkdev_dev_id: main clock: clkdev dev_id string
341 * @clkdev_con_id: main clock: clkdev con_id string
342 * @_clk: pointer to the main struct clk (filled in at runtime)
343 * @opt_clks: other device clocks that drivers can request (0..*)
344 * @masters: ptr to array of OCP ifs that this hwmod can initiate on
345 * @slaves: ptr to array of OCP ifs that this hwmod can respond on
346 * @sysconfig: device SYSCONFIG/SYSSTATUS register data
347 * @dev_attr: arbitrary device attributes that can be passed to the driver
348 * @_sysc_cache: internal-use hwmod flags
349 * @_rt_va: cached register target start address (internal use)
350 * @_mpu_port_index: cached MPU register target slave ID (internal use)
351 * @msuspendmux_reg_id: CONTROL_MSUSPENDMUX register ID (1-6)
352 * @msuspendmux_shift: CONTROL_MSUSPENDMUX register bit shift
353 * @mpu_irqs_cnt: number of @mpu_irqs
354 * @sdma_chs_cnt: number of @sdma_chs
355 * @opt_clks_cnt: number of @opt_clks
356 * @master_cnt: number of @master entries
357 * @slaves_cnt: number of @slave entries
358 * @response_lat: device OCP response latency (in interface clock cycles)
359 * @_int_flags: internal-use hwmod flags
360 * @_state: internal-use hwmod state
361 * @flags: hwmod flags (documented below)
362 * @omap_chip: OMAP chips this hwmod is present on
363 * @node: list node for hwmod list (internal use)
364 *
365 * @clkdev_dev_id, @clkdev_con_id, and @clk all refer to this module's "main
366 * clock," which for our purposes is defined as "the functional clock needed
367 * for register accesses to complete." Modules may not have a main clock if
368 * the interface clock also serves as a main clock.
369 *
370 * Parameter names beginning with an underscore are managed internally by
371 * the omap_hwmod code and should not be set during initialization.
372 */
373struct omap_hwmod {
374 const char *name;
375 struct omap_device *od;
376 u8 *mpu_irqs;
377 struct omap_hwmod_dma_info *sdma_chs;
378 union {
379 struct omap_hwmod_omap2_prcm omap2;
380 struct omap_hwmod_omap4_prcm omap4;
381 } prcm;
382 const char *clkdev_dev_id;
383 const char *clkdev_con_id;
384 struct clk *_clk;
385 struct omap_hwmod_opt_clk *opt_clks;
386 struct omap_hwmod_ocp_if **masters; /* connect to *_IA */
387 struct omap_hwmod_ocp_if **slaves; /* connect to *_TA */
388 struct omap_hwmod_sysconfig *sysconfig;
389 void *dev_attr;
390 u32 _sysc_cache;
391 void __iomem *_rt_va;
392 struct list_head node;
393 u16 flags;
394 u8 _mpu_port_index;
395 u8 msuspendmux_reg_id;
396 u8 msuspendmux_shift;
397 u8 response_lat;
398 u8 mpu_irqs_cnt;
399 u8 sdma_chs_cnt;
400 u8 opt_clks_cnt;
401 u8 masters_cnt;
402 u8 slaves_cnt;
403 u8 hwmods_cnt;
404 u8 _int_flags;
405 u8 _state;
406 const struct omap_chip_id omap_chip;
407};
408
409int omap_hwmod_init(struct omap_hwmod **ohs);
410int omap_hwmod_register(struct omap_hwmod *oh);
411int omap_hwmod_unregister(struct omap_hwmod *oh);
412struct omap_hwmod *omap_hwmod_lookup(const char *name);
413int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh));
414int omap_hwmod_late_init(void);
415
416int omap_hwmod_enable(struct omap_hwmod *oh);
417int omap_hwmod_idle(struct omap_hwmod *oh);
418int omap_hwmod_shutdown(struct omap_hwmod *oh);
419
420int omap_hwmod_enable_clocks(struct omap_hwmod *oh);
421int omap_hwmod_disable_clocks(struct omap_hwmod *oh);
422
423int omap_hwmod_reset(struct omap_hwmod *oh);
424void omap_hwmod_ocp_barrier(struct omap_hwmod *oh);
425
426void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs);
427u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs);
428
429int omap_hwmod_count_resources(struct omap_hwmod *oh);
430int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);
431
432struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh);
433
434int omap_hwmod_add_initiator_dep(struct omap_hwmod *oh,
435 struct omap_hwmod *init_oh);
436int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh,
437 struct omap_hwmod *init_oh);
438
439int omap_hwmod_set_clockact_both(struct omap_hwmod *oh);
440int omap_hwmod_set_clockact_main(struct omap_hwmod *oh);
441int omap_hwmod_set_clockact_iclk(struct omap_hwmod *oh);
442int omap_hwmod_set_clockact_none(struct omap_hwmod *oh);
443
444int omap_hwmod_enable_wakeup(struct omap_hwmod *oh);
445int omap_hwmod_disable_wakeup(struct omap_hwmod *oh);
446
447#endif
generated by cgit v1.2.2 (git 2.25.0) at 2026-07-22 13:10:57 -0400