diff options
author | Olof Johansson <olof@lixom.net> | 2012-10-01 14:25:41 -0700 |
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committer | Olof Johansson <olof@lixom.net> | 2012-10-01 14:25:41 -0700 |
commit | 5d3a0a95868a9669816da193bb284121df9031c8 (patch) | |
tree | 292ce2c9135bd7b524b4710cff9a174c2967d600 /arch/arm/mach-bcmring/csp/tmr/tmrHw.c | |
parent | 7e95c548818d2b311090848083277fb907cfb56d (diff) | |
parent | b98138e00d96abc85b100c9b6886f105d9868ab5 (diff) |
Merge branch 'next/cleanup2' into HEAD
Conflicts:
arch/arm/Kconfig
arch/arm/Makefile
arch/arm/mach-bcmring/arch.c
arch/arm/mach-tegra/devices.c
arch/arm/mach-tegra/dma.c
Diffstat (limited to 'arch/arm/mach-bcmring/csp/tmr/tmrHw.c')
-rw-r--r-- | arch/arm/mach-bcmring/csp/tmr/tmrHw.c | 576 |
1 files changed, 0 insertions, 576 deletions
diff --git a/arch/arm/mach-bcmring/csp/tmr/tmrHw.c b/arch/arm/mach-bcmring/csp/tmr/tmrHw.c deleted file mode 100644 index dc4137ff75ca..000000000000 --- a/arch/arm/mach-bcmring/csp/tmr/tmrHw.c +++ /dev/null @@ -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 <linux/errno.h> -#include <linux/types.h> - -#include <mach/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; -} |