aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-bcmring
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-bcmring')
-rw-r--r--arch/arm/mach-bcmring/csp/tmr/Makefile1
-rw-r--r--arch/arm/mach-bcmring/csp/tmr/tmrHw.c576
-rw-r--r--arch/arm/mach-bcmring/include/csp/tmrHw.h263
-rw-r--r--arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h82
4 files changed, 922 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/csp/tmr/Makefile b/arch/arm/mach-bcmring/csp/tmr/Makefile
new file mode 100644
index 000000000000..244a61ab7697
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/tmr/Makefile
@@ -0,0 +1 @@
obj-y += tmrHw.o
diff --git a/arch/arm/mach-bcmring/csp/tmr/tmrHw.c b/arch/arm/mach-bcmring/csp/tmr/tmrHw.c
new file mode 100644
index 000000000000..5c1c9a0e5ed2
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/tmr/tmrHw.c
@@ -0,0 +1,576 @@
1/*****************************************************************************
2* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
3*
4* Unless you and Broadcom execute a separate written software license
5* agreement governing use of this software, this software is licensed to you
6* under the terms of the GNU General Public License version 2, available at
7* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
8*
9* Notwithstanding the above, under no circumstances may you combine this
10* software in any way with any other Broadcom software provided under a
11* license other than the GPL, without Broadcom's express prior written
12* consent.
13*****************************************************************************/
14
15/****************************************************************************/
16/**
17* @file tmrHw.c
18*
19* @brief Low level Timer driver routines
20*
21* @note
22*
23* These routines provide basic timer functionality only.
24*/
25/****************************************************************************/
26
27/* ---- Include Files ---------------------------------------------------- */
28
29#include <csp/errno.h>
30#include <csp/stdint.h>
31
32#include <csp/tmrHw.h>
33#include <mach/csp/tmrHw_reg.h>
34
35#define tmrHw_ASSERT(a) if (!(a)) *(char *)0 = 0
36#define tmrHw_MILLISEC_PER_SEC (1000)
37
38#define tmrHw_LOW_1_RESOLUTION_COUNT (tmrHw_LOW_RESOLUTION_CLOCK / tmrHw_MILLISEC_PER_SEC)
39#define tmrHw_LOW_1_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_1_RESOLUTION_COUNT)
40#define tmrHw_LOW_16_RESOLUTION_COUNT (tmrHw_LOW_1_RESOLUTION_COUNT / 16)
41#define tmrHw_LOW_16_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_16_RESOLUTION_COUNT)
42#define tmrHw_LOW_256_RESOLUTION_COUNT (tmrHw_LOW_1_RESOLUTION_COUNT / 256)
43#define tmrHw_LOW_256_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_256_RESOLUTION_COUNT)
44
45#define tmrHw_HIGH_1_RESOLUTION_COUNT (tmrHw_HIGH_RESOLUTION_CLOCK / tmrHw_MILLISEC_PER_SEC)
46#define tmrHw_HIGH_1_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_1_RESOLUTION_COUNT)
47#define tmrHw_HIGH_16_RESOLUTION_COUNT (tmrHw_HIGH_1_RESOLUTION_COUNT / 16)
48#define tmrHw_HIGH_16_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_16_RESOLUTION_COUNT)
49#define tmrHw_HIGH_256_RESOLUTION_COUNT (tmrHw_HIGH_1_RESOLUTION_COUNT / 256)
50#define tmrHw_HIGH_256_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_256_RESOLUTION_COUNT)
51
52static void ResetTimer(tmrHw_ID_t timerId)
53 __attribute__ ((section(".aramtext")));
54static int tmrHw_divide(int num, int denom)
55 __attribute__ ((section(".aramtext")));
56
57/****************************************************************************/
58/**
59* @brief Get timer capability
60*
61* This function returns various capabilities/attributes of a timer
62*
63* @return Capability
64*
65*/
66/****************************************************************************/
67uint32_t tmrHw_getTimerCapability(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
68 tmrHw_CAPABILITY_e capability /* [ IN ] Timer capability */
69) {
70 switch (capability) {
71 case tmrHw_CAPABILITY_CLOCK:
72 return (timerId <=
73 1) ? tmrHw_LOW_RESOLUTION_CLOCK :
74 tmrHw_HIGH_RESOLUTION_CLOCK;
75 case tmrHw_CAPABILITY_RESOLUTION:
76 return 32;
77 default:
78 return 0;
79 }
80 return 0;
81}
82
83/****************************************************************************/
84/**
85* @brief Resets a timer
86*
87* This function initializes timer
88*
89* @return void
90*
91*/
92/****************************************************************************/
93static void ResetTimer(tmrHw_ID_t timerId /* [ IN ] Timer Id */
94) {
95 /* Reset timer */
96 pTmrHw[timerId].LoadValue = 0;
97 pTmrHw[timerId].CurrentValue = 0xFFFFFFFF;
98 pTmrHw[timerId].Control = 0;
99 pTmrHw[timerId].BackgroundLoad = 0;
100 /* Always configure as a 32 bit timer */
101 pTmrHw[timerId].Control |= tmrHw_CONTROL_32BIT;
102 /* Clear interrupt only if raw status interrupt is set */
103 if (pTmrHw[timerId].RawInterruptStatus) {
104 pTmrHw[timerId].InterruptClear = 0xFFFFFFFF;
105 }
106}
107
108/****************************************************************************/
109/**
110* @brief Sets counter value for an interval in ms
111*
112* @return On success: Effective counter value set
113* On failure: 0
114*
115*/
116/****************************************************************************/
117static tmrHw_INTERVAL_t SetTimerPeriod(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
118 tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
119) {
120 uint32_t scale = 0;
121 uint32_t count = 0;
122
123 if (timerId == 0 || timerId == 1) {
124 if (msec <= tmrHw_LOW_1_MAX_MILLISEC) {
125 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
126 scale = tmrHw_LOW_1_RESOLUTION_COUNT;
127 } else if (msec <= tmrHw_LOW_16_MAX_MILLISEC) {
128 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
129 scale = tmrHw_LOW_16_RESOLUTION_COUNT;
130 } else if (msec <= tmrHw_LOW_256_MAX_MILLISEC) {
131 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
132 scale = tmrHw_LOW_256_RESOLUTION_COUNT;
133 } else {
134 return 0;
135 }
136
137 count = msec * scale;
138 /* Set counter value */
139 pTmrHw[timerId].LoadValue = count;
140 pTmrHw[timerId].BackgroundLoad = count;
141
142 } else if (timerId == 2 || timerId == 3) {
143 if (msec <= tmrHw_HIGH_1_MAX_MILLISEC) {
144 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
145 scale = tmrHw_HIGH_1_RESOLUTION_COUNT;
146 } else if (msec <= tmrHw_HIGH_16_MAX_MILLISEC) {
147 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
148 scale = tmrHw_HIGH_16_RESOLUTION_COUNT;
149 } else if (msec <= tmrHw_HIGH_256_MAX_MILLISEC) {
150 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
151 scale = tmrHw_HIGH_256_RESOLUTION_COUNT;
152 } else {
153 return 0;
154 }
155
156 count = msec * scale;
157 /* Set counter value */
158 pTmrHw[timerId].LoadValue = count;
159 pTmrHw[timerId].BackgroundLoad = count;
160 }
161 return count / scale;
162}
163
164/****************************************************************************/
165/**
166* @brief Configures a periodic timer in terms of timer interrupt rate
167*
168* This function initializes a periodic timer to generate specific number of
169* timer interrupt per second
170*
171* @return On success: Effective timer frequency
172* On failure: 0
173*
174*/
175/****************************************************************************/
176tmrHw_RATE_t tmrHw_setPeriodicTimerRate(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
177 tmrHw_RATE_t rate /* [ IN ] Number of timer interrupt per second */
178) {
179 uint32_t resolution = 0;
180 uint32_t count = 0;
181 ResetTimer(timerId);
182
183 /* Set timer mode periodic */
184 pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
185 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
186 /* Set timer in highest resolution */
187 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
188
189 if (rate && (timerId == 0 || timerId == 1)) {
190 if (rate > tmrHw_LOW_RESOLUTION_CLOCK) {
191 return 0;
192 }
193 resolution = tmrHw_LOW_RESOLUTION_CLOCK;
194 } else if (rate && (timerId == 2 || timerId == 3)) {
195 if (rate > tmrHw_HIGH_RESOLUTION_CLOCK) {
196 return 0;
197 } else {
198 resolution = tmrHw_HIGH_RESOLUTION_CLOCK;
199 }
200 } else {
201 return 0;
202 }
203 /* Find the counter value */
204 count = resolution / rate;
205 /* Set counter value */
206 pTmrHw[timerId].LoadValue = count;
207 pTmrHw[timerId].BackgroundLoad = count;
208
209 return resolution / count;
210}
211
212/****************************************************************************/
213/**
214* @brief Configures a periodic timer to generate timer interrupt after
215* certain time interval
216*
217* This function initializes a periodic timer to generate timer interrupt
218* after every time interval in millisecond
219*
220* @return On success: Effective interval set in milli-second
221* On failure: 0
222*
223*/
224/****************************************************************************/
225tmrHw_INTERVAL_t tmrHw_setPeriodicTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
226 tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
227) {
228 ResetTimer(timerId);
229
230 /* Set timer mode periodic */
231 pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
232 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
233
234 return SetTimerPeriod(timerId, msec);
235}
236
237/****************************************************************************/
238/**
239* @brief Configures a periodic timer to generate timer interrupt just once
240* after certain time interval
241*
242* This function initializes a periodic timer to generate a single ticks after
243* certain time interval in millisecond
244*
245* @return On success: Effective interval set in milli-second
246* On failure: 0
247*
248*/
249/****************************************************************************/
250tmrHw_INTERVAL_t tmrHw_setOneshotTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
251 tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
252) {
253 ResetTimer(timerId);
254
255 /* Set timer mode oneshot */
256 pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
257 pTmrHw[timerId].Control |= tmrHw_CONTROL_ONESHOT;
258
259 return SetTimerPeriod(timerId, msec);
260}
261
262/****************************************************************************/
263/**
264* @brief Configures a timer to run as a free running timer
265*
266* This function initializes a timer to run as a free running timer
267*
268* @return Timer resolution (count / sec)
269*
270*/
271/****************************************************************************/
272tmrHw_RATE_t tmrHw_setFreeRunningTimer(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
273 uint32_t divider /* [ IN ] Dividing the clock frequency */
274) {
275 uint32_t scale = 0;
276
277 ResetTimer(timerId);
278 /* Set timer as free running mode */
279 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_PERIODIC;
280 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
281
282 if (divider >= 64) {
283 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
284 scale = 256;
285 } else if (divider >= 8) {
286 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
287 scale = 16;
288 } else {
289 pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
290 scale = 1;
291 }
292
293 if (timerId == 0 || timerId == 1) {
294 return tmrHw_divide(tmrHw_LOW_RESOLUTION_CLOCK, scale);
295 } else if (timerId == 2 || timerId == 3) {
296 return tmrHw_divide(tmrHw_HIGH_RESOLUTION_CLOCK, scale);
297 }
298
299 return 0;
300}
301
302/****************************************************************************/
303/**
304* @brief Starts a timer
305*
306* This function starts a preconfigured timer
307*
308* @return -1 - On Failure
309* 0 - On Success
310*
311*/
312/****************************************************************************/
313int tmrHw_startTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
314) {
315 pTmrHw[timerId].Control |= tmrHw_CONTROL_TIMER_ENABLE;
316 return 0;
317}
318
319/****************************************************************************/
320/**
321* @brief Stops a timer
322*
323* This function stops a running timer
324*
325* @return -1 - On Failure
326* 0 - On Success
327*
328*/
329/****************************************************************************/
330int tmrHw_stopTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
331) {
332 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_TIMER_ENABLE;
333 return 0;
334}
335
336/****************************************************************************/
337/**
338* @brief Gets current timer count
339*
340* This function returns the current timer value
341*
342* @return Current downcounting timer value
343*
344*/
345/****************************************************************************/
346uint32_t tmrHw_GetCurrentCount(tmrHw_ID_t timerId /* [ IN ] Timer id */
347) {
348 /* return 32 bit timer value */
349 switch (pTmrHw[timerId].Control & tmrHw_CONTROL_MODE_MASK) {
350 case tmrHw_CONTROL_FREE_RUNNING:
351 if (pTmrHw[timerId].CurrentValue) {
352 return tmrHw_MAX_COUNT - pTmrHw[timerId].CurrentValue;
353 }
354 break;
355 case tmrHw_CONTROL_PERIODIC:
356 case tmrHw_CONTROL_ONESHOT:
357 return pTmrHw[timerId].BackgroundLoad -
358 pTmrHw[timerId].CurrentValue;
359 }
360 return 0;
361}
362
363/****************************************************************************/
364/**
365* @brief Gets timer count rate
366*
367* This function returns the number of counts per second
368*
369* @return Count rate
370*
371*/
372/****************************************************************************/
373tmrHw_RATE_t tmrHw_getCountRate(tmrHw_ID_t timerId /* [ IN ] Timer id */
374) {
375 uint32_t divider = 0;
376
377 switch (pTmrHw[timerId].Control & tmrHw_CONTROL_PRESCALE_MASK) {
378 case tmrHw_CONTROL_PRESCALE_1:
379 divider = 1;
380 break;
381 case tmrHw_CONTROL_PRESCALE_16:
382 divider = 16;
383 break;
384 case tmrHw_CONTROL_PRESCALE_256:
385 divider = 256;
386 break;
387 default:
388 tmrHw_ASSERT(0);
389 }
390
391 if (timerId == 0 || timerId == 1) {
392 return tmrHw_divide(tmrHw_LOW_RESOLUTION_CLOCK, divider);
393 } else {
394 return tmrHw_divide(tmrHw_HIGH_RESOLUTION_CLOCK, divider);
395 }
396 return 0;
397}
398
399/****************************************************************************/
400/**
401* @brief Enables timer interrupt
402*
403* This function enables the timer interrupt
404*
405* @return N/A
406*
407*/
408/****************************************************************************/
409void tmrHw_enableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
410) {
411 pTmrHw[timerId].Control |= tmrHw_CONTROL_INTERRUPT_ENABLE;
412}
413
414/****************************************************************************/
415/**
416* @brief Disables timer interrupt
417*
418* This function disable the timer interrupt
419*
420* @return N/A
421*
422*/
423/****************************************************************************/
424void tmrHw_disableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
425) {
426 pTmrHw[timerId].Control &= ~tmrHw_CONTROL_INTERRUPT_ENABLE;
427}
428
429/****************************************************************************/
430/**
431* @brief Clears the interrupt
432*
433* This function clears the timer interrupt
434*
435* @return N/A
436*
437* @note
438* Must be called under the context of ISR
439*/
440/****************************************************************************/
441void tmrHw_clearInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
442) {
443 pTmrHw[timerId].InterruptClear = 0x1;
444}
445
446/****************************************************************************/
447/**
448* @brief Gets the interrupt status
449*
450* This function returns timer interrupt status
451*
452* @return Interrupt status
453*/
454/****************************************************************************/
455tmrHw_INTERRUPT_STATUS_e tmrHw_getInterruptStatus(tmrHw_ID_t timerId /* [ IN ] Timer id */
456) {
457 if (pTmrHw[timerId].InterruptStatus) {
458 return tmrHw_INTERRUPT_STATUS_SET;
459 } else {
460 return tmrHw_INTERRUPT_STATUS_UNSET;
461 }
462}
463
464/****************************************************************************/
465/**
466* @brief Indentifies a timer causing interrupt
467*
468* This functions returns a timer causing interrupt
469*
470* @return 0xFFFFFFFF : No timer causing an interrupt
471* ! 0xFFFFFFFF : timer causing an interrupt
472* @note
473* tmrHw_clearIntrrupt() must be called with a valid timer id after calling this function
474*/
475/****************************************************************************/
476tmrHw_ID_t tmrHw_getInterruptSource(void /* void */
477) {
478 int i;
479
480 for (i = 0; i < tmrHw_TIMER_NUM_COUNT; i++) {
481 if (pTmrHw[i].InterruptStatus) {
482 return i;
483 }
484 }
485
486 return 0xFFFFFFFF;
487}
488
489/****************************************************************************/
490/**
491* @brief Displays specific timer registers
492*
493*
494* @return void
495*
496*/
497/****************************************************************************/
498void tmrHw_printDebugInfo(tmrHw_ID_t timerId, /* [ IN ] Timer id */
499 int (*fpPrint) (const char *, ...) /* [ IN ] Print callback function */
500) {
501 (*fpPrint) ("Displaying register contents \n\n");
502 (*fpPrint) ("Timer %d: Load value 0x%X\n", timerId,
503 pTmrHw[timerId].LoadValue);
504 (*fpPrint) ("Timer %d: Background load value 0x%X\n", timerId,
505 pTmrHw[timerId].BackgroundLoad);
506 (*fpPrint) ("Timer %d: Control 0x%X\n", timerId,
507 pTmrHw[timerId].Control);
508 (*fpPrint) ("Timer %d: Interrupt clear 0x%X\n", timerId,
509 pTmrHw[timerId].InterruptClear);
510 (*fpPrint) ("Timer %d: Interrupt raw interrupt 0x%X\n", timerId,
511 pTmrHw[timerId].RawInterruptStatus);
512 (*fpPrint) ("Timer %d: Interrupt status 0x%X\n", timerId,
513 pTmrHw[timerId].InterruptStatus);
514}
515
516/****************************************************************************/
517/**
518* @brief Use a timer to perform a busy wait delay for a number of usecs.
519*
520* @return N/A
521*/
522/****************************************************************************/
523void tmrHw_udelay(tmrHw_ID_t timerId, /* [ IN ] Timer id */
524 unsigned long usecs /* [ IN ] usec to delay */
525) {
526 tmrHw_RATE_t usec_tick_rate;
527 tmrHw_COUNT_t start_time;
528 tmrHw_COUNT_t delta_time;
529
530 start_time = tmrHw_GetCurrentCount(timerId);
531 usec_tick_rate = tmrHw_divide(tmrHw_getCountRate(timerId), 1000000);
532 delta_time = usecs * usec_tick_rate;
533
534 /* Busy wait */
535 while (delta_time > (tmrHw_GetCurrentCount(timerId) - start_time))
536 ;
537}
538
539/****************************************************************************/
540/**
541* @brief Local Divide function
542*
543* This function does the divide
544*
545* @return divide value
546*
547*/
548/****************************************************************************/
549static int tmrHw_divide(int num, int denom)
550{
551 int r;
552 int t = 1;
553
554 /* Shift denom and t up to the largest value to optimize algorithm */
555 /* t contains the units of each divide */
556 while ((denom & 0x40000000) == 0) { /* fails if denom=0 */
557 denom = denom << 1;
558 t = t << 1;
559 }
560
561 /* Intialize the result */
562 r = 0;
563
564 do {
565 /* Determine if there exists a positive remainder */
566 if ((num - denom) >= 0) {
567 /* Accumlate t to the result and calculate a new remainder */
568 num = num - denom;
569 r = r + t;
570 }
571 /* Continue to shift denom and shift t down to 0 */
572 denom = denom >> 1;
573 t = t >> 1;
574 } while (t != 0);
575 return r;
576}
diff --git a/arch/arm/mach-bcmring/include/csp/tmrHw.h b/arch/arm/mach-bcmring/include/csp/tmrHw.h
new file mode 100644
index 000000000000..f1236d00cb97
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/csp/tmrHw.h
@@ -0,0 +1,263 @@
1/*****************************************************************************
2* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved.
3*
4* Unless you and Broadcom execute a separate written software license
5* agreement governing use of this software, this software is licensed to you
6* under the terms of the GNU General Public License version 2, available at
7* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
8*
9* Notwithstanding the above, under no circumstances may you combine this
10* software in any way with any other Broadcom software provided under a
11* license other than the GPL, without Broadcom's express prior written
12* consent.
13*****************************************************************************/
14
15/****************************************************************************/
16/**
17* @file tmrHw.h
18*
19* @brief API definitions for low level Timer driver
20*
21*/
22/****************************************************************************/
23#ifndef _TMRHW_H
24#define _TMRHW_H
25
26#include <csp/stdint.h>
27
28typedef uint32_t tmrHw_ID_t; /* Timer ID */
29typedef uint32_t tmrHw_COUNT_t; /* Timer count */
30typedef uint32_t tmrHw_INTERVAL_t; /* Timer interval */
31typedef uint32_t tmrHw_RATE_t; /* Timer event (count/interrupt) rate */
32
33typedef enum {
34 tmrHw_INTERRUPT_STATUS_SET, /* Interrupted */
35 tmrHw_INTERRUPT_STATUS_UNSET /* No Interrupt */
36} tmrHw_INTERRUPT_STATUS_e;
37
38typedef enum {
39 tmrHw_CAPABILITY_CLOCK, /* Clock speed in HHz */
40 tmrHw_CAPABILITY_RESOLUTION /* Timer resolution in bits */
41} tmrHw_CAPABILITY_e;
42
43/****************************************************************************/
44/**
45* @brief Get timer capability
46*
47* This function returns various capabilities/attributes of a timer
48*
49* @return Numeric capability
50*
51*/
52/****************************************************************************/
53uint32_t tmrHw_getTimerCapability(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
54 tmrHw_CAPABILITY_e capability /* [ IN ] Timer capability */
55);
56
57/****************************************************************************/
58/**
59* @brief Configures a periodic timer in terms of timer interrupt rate
60*
61* This function initializes a periodic timer to generate specific number of
62* timer interrupt per second
63*
64* @return On success: Effective timer frequency
65* On failure: 0
66*
67*/
68/****************************************************************************/
69tmrHw_RATE_t tmrHw_setPeriodicTimerRate(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
70 tmrHw_RATE_t rate /* [ IN ] Number of timer interrupt per second */
71);
72
73/****************************************************************************/
74/**
75* @brief Configures a periodic timer to generate timer interrupt after
76* certain time interval
77*
78* This function initializes a periodic timer to generate timer interrupt
79* after every time interval in milisecond
80*
81* @return On success: Effective interval set in mili-second
82* On failure: 0
83*
84*/
85/****************************************************************************/
86tmrHw_INTERVAL_t tmrHw_setPeriodicTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
87 tmrHw_INTERVAL_t msec /* [ IN ] Interval in mili-second */
88);
89
90/****************************************************************************/
91/**
92* @brief Configures a periodic timer to generate timer interrupt just once
93* after certain time interval
94*
95* This function initializes a periodic timer to generate a single ticks after
96* certain time interval in milisecond
97*
98* @return On success: Effective interval set in mili-second
99* On failure: 0
100*
101*/
102/****************************************************************************/
103tmrHw_INTERVAL_t tmrHw_setOneshotTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
104 tmrHw_INTERVAL_t msec /* [ IN ] Interval in mili-second */
105);
106
107/****************************************************************************/
108/**
109* @brief Configures a timer to run as a free running timer
110*
111* This function initializes a timer to run as a free running timer
112*
113* @return Timer resolution (count / sec)
114*
115*/
116/****************************************************************************/
117tmrHw_RATE_t tmrHw_setFreeRunningTimer(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
118 uint32_t divider /* [ IN ] Dividing the clock frequency */
119) __attribute__ ((section(".aramtext")));
120
121/****************************************************************************/
122/**
123* @brief Starts a timer
124*
125* This function starts a preconfigured timer
126*
127* @return -1 - On Failure
128* 0 - On Success
129*/
130/****************************************************************************/
131int tmrHw_startTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
132) __attribute__ ((section(".aramtext")));
133
134/****************************************************************************/
135/**
136* @brief Stops a timer
137*
138* This function stops a running timer
139*
140* @return -1 - On Failure
141* 0 - On Success
142*/
143/****************************************************************************/
144int tmrHw_stopTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
145);
146
147/****************************************************************************/
148/**
149* @brief Gets current timer count
150*
151* This function returns the current timer value
152*
153* @return Current downcounting timer value
154*
155*/
156/****************************************************************************/
157tmrHw_COUNT_t tmrHw_GetCurrentCount(tmrHw_ID_t timerId /* [ IN ] Timer id */
158) __attribute__ ((section(".aramtext")));
159
160/****************************************************************************/
161/**
162* @brief Gets timer count rate
163*
164* This function returns the number of counts per second
165*
166* @return Count rate
167*
168*/
169/****************************************************************************/
170tmrHw_RATE_t tmrHw_getCountRate(tmrHw_ID_t timerId /* [ IN ] Timer id */
171) __attribute__ ((section(".aramtext")));
172
173/****************************************************************************/
174/**
175* @brief Enables timer interrupt
176*
177* This function enables the timer interrupt
178*
179* @return N/A
180*
181*/
182/****************************************************************************/
183void tmrHw_enableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
184);
185
186/****************************************************************************/
187/**
188* @brief Disables timer interrupt
189*
190* This function disable the timer interrupt
191*
192* @return N/A
193*/
194/****************************************************************************/
195void tmrHw_disableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
196);
197
198/****************************************************************************/
199/**
200* @brief Clears the interrupt
201*
202* This function clears the timer interrupt
203*
204* @return N/A
205*
206* @note
207* Must be called under the context of ISR
208*/
209/****************************************************************************/
210void tmrHw_clearInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
211);
212
213/****************************************************************************/
214/**
215* @brief Gets the interrupt status
216*
217* This function returns timer interrupt status
218*
219* @return Interrupt status
220*/
221/****************************************************************************/
222tmrHw_INTERRUPT_STATUS_e tmrHw_getInterruptStatus(tmrHw_ID_t timerId /* [ IN ] Timer id */
223);
224
225/****************************************************************************/
226/**
227* @brief Indentifies a timer causing interrupt
228*
229* This functions returns a timer causing interrupt
230*
231* @return 0xFFFFFFFF : No timer causing an interrupt
232* ! 0xFFFFFFFF : timer causing an interrupt
233* @note
234* tmrHw_clearIntrrupt() must be called with a valid timer id after calling this function
235*/
236/****************************************************************************/
237tmrHw_ID_t tmrHw_getInterruptSource(void);
238
239/****************************************************************************/
240/**
241* @brief Displays specific timer registers
242*
243*
244* @return void
245*
246*/
247/****************************************************************************/
248void tmrHw_printDebugInfo(tmrHw_ID_t timerId, /* [ IN ] Timer id */
249 int (*fpPrint) (const char *, ...) /* [ IN ] Print callback function */
250);
251
252/****************************************************************************/
253/**
254* @brief Use a timer to perform a busy wait delay for a number of usecs.
255*
256* @return N/A
257*/
258/****************************************************************************/
259void tmrHw_udelay(tmrHw_ID_t timerId, /* [ IN ] Timer id */
260 unsigned long usecs /* [ IN ] usec to delay */
261) __attribute__ ((section(".aramtext")));
262
263#endif /* _TMRHW_H */
diff --git a/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h b/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h
new file mode 100644
index 000000000000..3080ac7239a1
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/mach/csp/tmrHw_reg.h
@@ -0,0 +1,82 @@
1/*****************************************************************************
2* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved.
3*
4* Unless you and Broadcom execute a separate written software license
5* agreement governing use of this software, this software is licensed to you
6* under the terms of the GNU General Public License version 2, available at
7* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
8*
9* Notwithstanding the above, under no circumstances may you combine this
10* software in any way with any other Broadcom software provided under a
11* license other than the GPL, without Broadcom's express prior written
12* consent.
13*****************************************************************************/
14
15/****************************************************************************/
16/**
17* @file tmrHw_reg.h
18*
19* @brief Definitions for low level Timer registers
20*
21*/
22/****************************************************************************/
23#ifndef _TMRHW_REG_H
24#define _TMRHW_REG_H
25
26#include <mach/csp/mm_io.h>
27#include <mach/csp/hw_cfg.h>
28/* Base address */
29#define tmrHw_MODULE_BASE_ADDR MM_IO_BASE_TMR
30
31/*
32This platform has four different timers running at different clock speed
33
34Timer one (Timer ID 0) runs at 25 MHz
35Timer two (Timer ID 1) runs at 25 MHz
36Timer three (Timer ID 2) runs at 150 MHz
37Timer four (Timer ID 3) runs at 150 MHz
38*/
39#define tmrHw_LOW_FREQUENCY_MHZ 25 /* Always 25MHz from XTAL */
40#define tmrHw_LOW_FREQUENCY_HZ 25000000
41
42#if defined(CFG_GLOBAL_CHIP) && (CFG_GLOBAL_CHIP == FPGA11107)
43#define tmrHw_HIGH_FREQUENCY_MHZ 150 /* Always 150MHz for FPGA */
44#define tmrHw_HIGH_FREQUENCY_HZ 150000000
45#else
46#define tmrHw_HIGH_FREQUENCY_HZ HW_CFG_BUS_CLK_HZ
47#define tmrHw_HIGH_FREQUENCY_MHZ (HW_CFG_BUS_CLK_HZ / 1000000)
48#endif
49
50#define tmrHw_LOW_RESOLUTION_CLOCK tmrHw_LOW_FREQUENCY_HZ
51#define tmrHw_HIGH_RESOLUTION_CLOCK tmrHw_HIGH_FREQUENCY_HZ
52#define tmrHw_MAX_COUNT (0xFFFFFFFF) /* maximum number of count a timer can count */
53#define tmrHw_TIMER_NUM_COUNT (4) /* Number of timer module supported */
54
55typedef struct {
56 uint32_t LoadValue; /* Load value for timer */
57 uint32_t CurrentValue; /* Current value for timer */
58 uint32_t Control; /* Control register */
59 uint32_t InterruptClear; /* Interrupt clear register */
60 uint32_t RawInterruptStatus; /* Raw interrupt status */
61 uint32_t InterruptStatus; /* Masked interrupt status */
62 uint32_t BackgroundLoad; /* Background load value */
63 uint32_t padding; /* Padding register */
64} tmrHw_REG_t;
65
66/* Control bot masks */
67#define tmrHw_CONTROL_TIMER_ENABLE 0x00000080
68#define tmrHw_CONTROL_PERIODIC 0x00000040
69#define tmrHw_CONTROL_INTERRUPT_ENABLE 0x00000020
70#define tmrHw_CONTROL_PRESCALE_MASK 0x0000000C
71#define tmrHw_CONTROL_PRESCALE_1 0x00000000
72#define tmrHw_CONTROL_PRESCALE_16 0x00000004
73#define tmrHw_CONTROL_PRESCALE_256 0x00000008
74#define tmrHw_CONTROL_32BIT 0x00000002
75#define tmrHw_CONTROL_ONESHOT 0x00000001
76#define tmrHw_CONTROL_FREE_RUNNING 0x00000000
77
78#define tmrHw_CONTROL_MODE_MASK (tmrHw_CONTROL_PERIODIC | tmrHw_CONTROL_ONESHOT)
79
80#define pTmrHw ((volatile tmrHw_REG_t *)tmrHw_MODULE_BASE_ADDR)
81
82#endif /* _TMRHW_REG_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 04:47:54 -0500