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Diffstat (limited to 'arch/arm/mach-bcmring/csp/tmr/tmrHw.c')
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diff --git a/arch/arm/mach-bcmring/csp/tmr/tmrHw.c b/arch/arm/mach-bcmring/csp/tmr/tmrHw.c
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index 16225e43f3c3..000000000000
--- a/arch/arm/mach-bcmring/csp/tmr/tmrHw.c
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@@ -1,576 +0,0 @@
-/*****************************************************************************
-* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/****************************************************************************/
-/**
-* @file tmrHw.c
-*
-* @brief Low level Timer driver routines
-*
-* @note
-*
-* These routines provide basic timer functionality only.
-*/
-/****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-
-#include <csp/errno.h>
-#include <csp/stdint.h>
-
-#include <csp/tmrHw.h>
-#include <mach/csp/tmrHw_reg.h>
-
-#define tmrHw_ASSERT(a) if (!(a)) *(char *)0 = 0
-#define tmrHw_MILLISEC_PER_SEC (1000)
-
-#define tmrHw_LOW_1_RESOLUTION_COUNT (tmrHw_LOW_RESOLUTION_CLOCK / tmrHw_MILLISEC_PER_SEC)
-#define tmrHw_LOW_1_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_1_RESOLUTION_COUNT)
-#define tmrHw_LOW_16_RESOLUTION_COUNT (tmrHw_LOW_1_RESOLUTION_COUNT / 16)
-#define tmrHw_LOW_16_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_16_RESOLUTION_COUNT)
-#define tmrHw_LOW_256_RESOLUTION_COUNT (tmrHw_LOW_1_RESOLUTION_COUNT / 256)
-#define tmrHw_LOW_256_MAX_MILLISEC (0xFFFFFFFF / tmrHw_LOW_256_RESOLUTION_COUNT)
-
-#define tmrHw_HIGH_1_RESOLUTION_COUNT (tmrHw_HIGH_RESOLUTION_CLOCK / tmrHw_MILLISEC_PER_SEC)
-#define tmrHw_HIGH_1_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_1_RESOLUTION_COUNT)
-#define tmrHw_HIGH_16_RESOLUTION_COUNT (tmrHw_HIGH_1_RESOLUTION_COUNT / 16)
-#define tmrHw_HIGH_16_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_16_RESOLUTION_COUNT)
-#define tmrHw_HIGH_256_RESOLUTION_COUNT (tmrHw_HIGH_1_RESOLUTION_COUNT / 256)
-#define tmrHw_HIGH_256_MAX_MILLISEC (0xFFFFFFFF / tmrHw_HIGH_256_RESOLUTION_COUNT)
-
-static void ResetTimer(tmrHw_ID_t timerId)
- __attribute__ ((section(".aramtext")));
-static int tmrHw_divide(int num, int denom)
- __attribute__ ((section(".aramtext")));
-
-/****************************************************************************/
-/**
-* @brief Get timer capability
-*
-* This function returns various capabilities/attributes of a timer
-*
-* @return Capability
-*
-*/
-/****************************************************************************/
-uint32_t tmrHw_getTimerCapability(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- tmrHw_CAPABILITY_e capability /* [ IN ] Timer capability */
-) {
- switch (capability) {
- case tmrHw_CAPABILITY_CLOCK:
- return (timerId <=
- 1) ? tmrHw_LOW_RESOLUTION_CLOCK :
- tmrHw_HIGH_RESOLUTION_CLOCK;
- case tmrHw_CAPABILITY_RESOLUTION:
- return 32;
- default:
- return 0;
- }
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Resets a timer
-*
-* This function initializes timer
-*
-* @return void
-*
-*/
-/****************************************************************************/
-static void ResetTimer(tmrHw_ID_t timerId /* [ IN ] Timer Id */
-) {
- /* Reset timer */
- pTmrHw[timerId].LoadValue = 0;
- pTmrHw[timerId].CurrentValue = 0xFFFFFFFF;
- pTmrHw[timerId].Control = 0;
- pTmrHw[timerId].BackgroundLoad = 0;
- /* Always configure as a 32 bit timer */
- pTmrHw[timerId].Control |= tmrHw_CONTROL_32BIT;
- /* Clear interrupt only if raw status interrupt is set */
- if (pTmrHw[timerId].RawInterruptStatus) {
- pTmrHw[timerId].InterruptClear = 0xFFFFFFFF;
- }
-}
-
-/****************************************************************************/
-/**
-* @brief Sets counter value for an interval in ms
-*
-* @return On success: Effective counter value set
-* On failure: 0
-*
-*/
-/****************************************************************************/
-static tmrHw_INTERVAL_t SetTimerPeriod(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
-) {
- uint32_t scale = 0;
- uint32_t count = 0;
-
- if (timerId == 0 || timerId == 1) {
- if (msec <= tmrHw_LOW_1_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
- scale = tmrHw_LOW_1_RESOLUTION_COUNT;
- } else if (msec <= tmrHw_LOW_16_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
- scale = tmrHw_LOW_16_RESOLUTION_COUNT;
- } else if (msec <= tmrHw_LOW_256_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
- scale = tmrHw_LOW_256_RESOLUTION_COUNT;
- } else {
- return 0;
- }
-
- count = msec * scale;
- /* Set counter value */
- pTmrHw[timerId].LoadValue = count;
- pTmrHw[timerId].BackgroundLoad = count;
-
- } else if (timerId == 2 || timerId == 3) {
- if (msec <= tmrHw_HIGH_1_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
- scale = tmrHw_HIGH_1_RESOLUTION_COUNT;
- } else if (msec <= tmrHw_HIGH_16_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
- scale = tmrHw_HIGH_16_RESOLUTION_COUNT;
- } else if (msec <= tmrHw_HIGH_256_MAX_MILLISEC) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
- scale = tmrHw_HIGH_256_RESOLUTION_COUNT;
- } else {
- return 0;
- }
-
- count = msec * scale;
- /* Set counter value */
- pTmrHw[timerId].LoadValue = count;
- pTmrHw[timerId].BackgroundLoad = count;
- }
- return count / scale;
-}
-
-/****************************************************************************/
-/**
-* @brief Configures a periodic timer in terms of timer interrupt rate
-*
-* This function initializes a periodic timer to generate specific number of
-* timer interrupt per second
-*
-* @return On success: Effective timer frequency
-* On failure: 0
-*
-*/
-/****************************************************************************/
-tmrHw_RATE_t tmrHw_setPeriodicTimerRate(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- tmrHw_RATE_t rate /* [ IN ] Number of timer interrupt per second */
-) {
- uint32_t resolution = 0;
- uint32_t count = 0;
- ResetTimer(timerId);
-
- /* Set timer mode periodic */
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
- /* Set timer in highest resolution */
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
-
- if (rate && (timerId == 0 || timerId == 1)) {
- if (rate > tmrHw_LOW_RESOLUTION_CLOCK) {
- return 0;
- }
- resolution = tmrHw_LOW_RESOLUTION_CLOCK;
- } else if (rate && (timerId == 2 || timerId == 3)) {
- if (rate > tmrHw_HIGH_RESOLUTION_CLOCK) {
- return 0;
- } else {
- resolution = tmrHw_HIGH_RESOLUTION_CLOCK;
- }
- } else {
- return 0;
- }
- /* Find the counter value */
- count = resolution / rate;
- /* Set counter value */
- pTmrHw[timerId].LoadValue = count;
- pTmrHw[timerId].BackgroundLoad = count;
-
- return resolution / count;
-}
-
-/****************************************************************************/
-/**
-* @brief Configures a periodic timer to generate timer interrupt after
-* certain time interval
-*
-* This function initializes a periodic timer to generate timer interrupt
-* after every time interval in millisecond
-*
-* @return On success: Effective interval set in milli-second
-* On failure: 0
-*
-*/
-/****************************************************************************/
-tmrHw_INTERVAL_t tmrHw_setPeriodicTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
-) {
- ResetTimer(timerId);
-
- /* Set timer mode periodic */
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
-
- return SetTimerPeriod(timerId, msec);
-}
-
-/****************************************************************************/
-/**
-* @brief Configures a periodic timer to generate timer interrupt just once
-* after certain time interval
-*
-* This function initializes a periodic timer to generate a single ticks after
-* certain time interval in millisecond
-*
-* @return On success: Effective interval set in milli-second
-* On failure: 0
-*
-*/
-/****************************************************************************/
-tmrHw_INTERVAL_t tmrHw_setOneshotTimerInterval(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- tmrHw_INTERVAL_t msec /* [ IN ] Interval in milli-second */
-) {
- ResetTimer(timerId);
-
- /* Set timer mode oneshot */
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PERIODIC;
- pTmrHw[timerId].Control |= tmrHw_CONTROL_ONESHOT;
-
- return SetTimerPeriod(timerId, msec);
-}
-
-/****************************************************************************/
-/**
-* @brief Configures a timer to run as a free running timer
-*
-* This function initializes a timer to run as a free running timer
-*
-* @return Timer resolution (count / sec)
-*
-*/
-/****************************************************************************/
-tmrHw_RATE_t tmrHw_setFreeRunningTimer(tmrHw_ID_t timerId, /* [ IN ] Timer Id */
- uint32_t divider /* [ IN ] Dividing the clock frequency */
-) {
- uint32_t scale = 0;
-
- ResetTimer(timerId);
- /* Set timer as free running mode */
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_PERIODIC;
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_ONESHOT;
-
- if (divider >= 64) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_256;
- scale = 256;
- } else if (divider >= 8) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_16;
- scale = 16;
- } else {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_PRESCALE_1;
- scale = 1;
- }
-
- if (timerId == 0 || timerId == 1) {
- return tmrHw_divide(tmrHw_LOW_RESOLUTION_CLOCK, scale);
- } else if (timerId == 2 || timerId == 3) {
- return tmrHw_divide(tmrHw_HIGH_RESOLUTION_CLOCK, scale);
- }
-
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Starts a timer
-*
-* This function starts a preconfigured timer
-*
-* @return -1 - On Failure
-* 0 - On Success
-*
-*/
-/****************************************************************************/
-int tmrHw_startTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_TIMER_ENABLE;
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Stops a timer
-*
-* This function stops a running timer
-*
-* @return -1 - On Failure
-* 0 - On Success
-*
-*/
-/****************************************************************************/
-int tmrHw_stopTimer(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_TIMER_ENABLE;
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Gets current timer count
-*
-* This function returns the current timer value
-*
-* @return Current downcounting timer value
-*
-*/
-/****************************************************************************/
-uint32_t tmrHw_GetCurrentCount(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- /* return 32 bit timer value */
- switch (pTmrHw[timerId].Control & tmrHw_CONTROL_MODE_MASK) {
- case tmrHw_CONTROL_FREE_RUNNING:
- if (pTmrHw[timerId].CurrentValue) {
- return tmrHw_MAX_COUNT - pTmrHw[timerId].CurrentValue;
- }
- break;
- case tmrHw_CONTROL_PERIODIC:
- case tmrHw_CONTROL_ONESHOT:
- return pTmrHw[timerId].BackgroundLoad -
- pTmrHw[timerId].CurrentValue;
- }
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Gets timer count rate
-*
-* This function returns the number of counts per second
-*
-* @return Count rate
-*
-*/
-/****************************************************************************/
-tmrHw_RATE_t tmrHw_getCountRate(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- uint32_t divider = 0;
-
- switch (pTmrHw[timerId].Control & tmrHw_CONTROL_PRESCALE_MASK) {
- case tmrHw_CONTROL_PRESCALE_1:
- divider = 1;
- break;
- case tmrHw_CONTROL_PRESCALE_16:
- divider = 16;
- break;
- case tmrHw_CONTROL_PRESCALE_256:
- divider = 256;
- break;
- default:
- tmrHw_ASSERT(0);
- }
-
- if (timerId == 0 || timerId == 1) {
- return tmrHw_divide(tmrHw_LOW_RESOLUTION_CLOCK, divider);
- } else {
- return tmrHw_divide(tmrHw_HIGH_RESOLUTION_CLOCK, divider);
- }
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Enables timer interrupt
-*
-* This function enables the timer interrupt
-*
-* @return N/A
-*
-*/
-/****************************************************************************/
-void tmrHw_enableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- pTmrHw[timerId].Control |= tmrHw_CONTROL_INTERRUPT_ENABLE;
-}
-
-/****************************************************************************/
-/**
-* @brief Disables timer interrupt
-*
-* This function disable the timer interrupt
-*
-* @return N/A
-*
-*/
-/****************************************************************************/
-void tmrHw_disableInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- pTmrHw[timerId].Control &= ~tmrHw_CONTROL_INTERRUPT_ENABLE;
-}
-
-/****************************************************************************/
-/**
-* @brief Clears the interrupt
-*
-* This function clears the timer interrupt
-*
-* @return N/A
-*
-* @note
-* Must be called under the context of ISR
-*/
-/****************************************************************************/
-void tmrHw_clearInterrupt(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- pTmrHw[timerId].InterruptClear = 0x1;
-}
-
-/****************************************************************************/
-/**
-* @brief Gets the interrupt status
-*
-* This function returns timer interrupt status
-*
-* @return Interrupt status
-*/
-/****************************************************************************/
-tmrHw_INTERRUPT_STATUS_e tmrHw_getInterruptStatus(tmrHw_ID_t timerId /* [ IN ] Timer id */
-) {
- if (pTmrHw[timerId].InterruptStatus) {
- return tmrHw_INTERRUPT_STATUS_SET;
- } else {
- return tmrHw_INTERRUPT_STATUS_UNSET;
- }
-}
-
-/****************************************************************************/
-/**
-* @brief Indentifies a timer causing interrupt
-*
-* This functions returns a timer causing interrupt
-*
-* @return 0xFFFFFFFF : No timer causing an interrupt
-* ! 0xFFFFFFFF : timer causing an interrupt
-* @note
-* tmrHw_clearIntrrupt() must be called with a valid timer id after calling this function
-*/
-/****************************************************************************/
-tmrHw_ID_t tmrHw_getInterruptSource(void /* void */
-) {
- int i;
-
- for (i = 0; i < tmrHw_TIMER_NUM_COUNT; i++) {
- if (pTmrHw[i].InterruptStatus) {
- return i;
- }
- }
-
- return 0xFFFFFFFF;
-}
-
-/****************************************************************************/
-/**
-* @brief Displays specific timer registers
-*
-*
-* @return void
-*
-*/
-/****************************************************************************/
-void tmrHw_printDebugInfo(tmrHw_ID_t timerId, /* [ IN ] Timer id */
- int (*fpPrint) (const char *, ...) /* [ IN ] Print callback function */
-) {
- (*fpPrint) ("Displaying register contents \n\n");
- (*fpPrint) ("Timer %d: Load value 0x%X\n", timerId,
- pTmrHw[timerId].LoadValue);
- (*fpPrint) ("Timer %d: Background load value 0x%X\n", timerId,
- pTmrHw[timerId].BackgroundLoad);
- (*fpPrint) ("Timer %d: Control 0x%X\n", timerId,
- pTmrHw[timerId].Control);
- (*fpPrint) ("Timer %d: Interrupt clear 0x%X\n", timerId,
- pTmrHw[timerId].InterruptClear);
- (*fpPrint) ("Timer %d: Interrupt raw interrupt 0x%X\n", timerId,
- pTmrHw[timerId].RawInterruptStatus);
- (*fpPrint) ("Timer %d: Interrupt status 0x%X\n", timerId,
- pTmrHw[timerId].InterruptStatus);
-}
-
-/****************************************************************************/
-/**
-* @brief Use a timer to perform a busy wait delay for a number of usecs.
-*
-* @return N/A
-*/
-/****************************************************************************/
-void tmrHw_udelay(tmrHw_ID_t timerId, /* [ IN ] Timer id */
- unsigned long usecs /* [ IN ] usec to delay */
-) {
- tmrHw_RATE_t usec_tick_rate;
- tmrHw_COUNT_t start_time;
- tmrHw_COUNT_t delta_time;
-
- start_time = tmrHw_GetCurrentCount(timerId);
- usec_tick_rate = tmrHw_divide(tmrHw_getCountRate(timerId), 1000000);
- delta_time = usecs * usec_tick_rate;
-
- /* Busy wait */
- while (delta_time > (tmrHw_GetCurrentCount(timerId) - start_time))
- ;
-}
-
-/****************************************************************************/
-/**
-* @brief Local Divide function
-*
-* This function does the divide
-*
-* @return divide value
-*
-*/
-/****************************************************************************/
-static int tmrHw_divide(int num, int denom)
-{
- int r;
- int t = 1;
-
- /* Shift denom and t up to the largest value to optimize algorithm */
- /* t contains the units of each divide */
- while ((denom & 0x40000000) == 0) { /* fails if denom=0 */
- denom = denom << 1;
- t = t << 1;
- }
-
- /* Initialize the result */
- r = 0;
-
- do {
- /* Determine if there exists a positive remainder */
- if ((num - denom) >= 0) {
- /* Accumlate t to the result and calculate a new remainder */
- num = num - denom;
- r = r + t;
- }
- /* Continue to shift denom and shift t down to 0 */
- denom = denom >> 1;
- t = t >> 1;
- } while (t != 0);
- return r;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.