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Diffstat (limited to 'arch/arm/mach-bcmring/csp/chipc/chipcHw.c')
-rw-r--r--arch/arm/mach-bcmring/csp/chipc/chipcHw.c779
1 files changed, 0 insertions, 779 deletions
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw.c
deleted file mode 100644
index 5050833817b7..000000000000
--- a/arch/arm/mach-bcmring/csp/chipc/chipcHw.c
+++ /dev/null
@@ -1,779 +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 chipcHw.c
-*
-* @brief Low level Various CHIP clock controlling routines
-*
-* @note
-*
-* These routines provide basic clock controlling functionality only.
-*/
-/****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/export.h>
-
-#include <mach/csp/chipcHw_def.h>
-#include <mach/csp/chipcHw_inline.h>
-
-#include <mach/csp/reg.h>
-#include <linux/delay.h>
-
-/* ---- Private Constants and Types --------------------------------------- */
-
-/* VPM alignment algorithm uses this */
-#define MAX_PHASE_ADJUST_COUNT 0xFFFF /* Max number of times allowed to adjust the phase */
-#define MAX_PHASE_ALIGN_ATTEMPTS 10 /* Max number of attempt to align the phase */
-
-/* Local definition of clock type */
-#define PLL_CLOCK 1 /* PLL Clock */
-#define NON_PLL_CLOCK 2 /* Divider clock */
-
-static int chipcHw_divide(int num, int denom)
- __attribute__ ((section(".aramtext")));
-
-/****************************************************************************/
-/**
-* @brief Set clock fequency for miscellaneous configurable clocks
-*
-* This function sets clock frequency
-*
-* @return Configured clock frequency in hertz
-*
-*/
-/****************************************************************************/
-chipcHw_freq chipcHw_getClockFrequency(chipcHw_CLOCK_e clock /* [ IN ] Configurable clock */
- ) {
- uint32_t __iomem *pPLLReg = NULL;
- uint32_t __iomem *pClockCtrl = NULL;
- uint32_t __iomem *pDependentClock = NULL;
- uint32_t vcoFreqPll1Hz = 0; /* Effective VCO frequency for PLL1 in Hz */
- uint32_t vcoFreqPll2Hz = 0; /* Effective VCO frequency for PLL2 in Hz */
- uint32_t dependentClockType = 0;
- uint32_t vcoHz = 0;
-
- /* Get VCO frequencies */
- if ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_MASK) != chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER) {
- uint64_t adjustFreq = 0;
-
- vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
-
- /* Adjusted frequency due to chipcHw_REG_PLL_DIVIDER_NDIV_f_SS */
- adjustFreq = (uint64_t) chipcHw_XTAL_FREQ_Hz *
- (uint64_t) chipcHw_REG_PLL_DIVIDER_NDIV_f_SS *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, (chipcHw_REG_PLL_PREDIVIDER_P2 * (uint64_t) chipcHw_REG_PLL_DIVIDER_FRAC));
- vcoFreqPll1Hz += (uint32_t) adjustFreq;
- } else {
- vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
- }
- vcoFreqPll2Hz =
- chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider2) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
-
- switch (clock) {
- case chipcHw_CLOCK_DDR:
- pPLLReg = &pChipcHw->DDRClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ARM:
- pPLLReg = &pChipcHw->ARMClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ESW:
- pPLLReg = &pChipcHw->ESWClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_VPM:
- pPLLReg = &pChipcHw->VPMClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ESW125:
- pPLLReg = &pChipcHw->ESW125Clock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_UART:
- pPLLReg = &pChipcHw->UARTClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SDIO0:
- pPLLReg = &pChipcHw->SDIO0Clock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SDIO1:
- pPLLReg = &pChipcHw->SDIO1Clock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SPI:
- pPLLReg = &pChipcHw->SPIClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ETM:
- pPLLReg = &pChipcHw->ETMClock;
- vcoHz = vcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_USB:
- pPLLReg = &pChipcHw->USBClock;
- vcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_LCD:
- pPLLReg = &pChipcHw->LCDClock;
- vcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_APM:
- pPLLReg = &pChipcHw->APMClock;
- vcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_BUS:
- pClockCtrl = &pChipcHw->ACLKClock;
- pDependentClock = &pChipcHw->ARMClock;
- vcoHz = vcoFreqPll1Hz;
- dependentClockType = PLL_CLOCK;
- break;
- case chipcHw_CLOCK_OTP:
- pClockCtrl = &pChipcHw->OTPClock;
- break;
- case chipcHw_CLOCK_I2C:
- pClockCtrl = &pChipcHw->I2CClock;
- break;
- case chipcHw_CLOCK_I2S0:
- pClockCtrl = &pChipcHw->I2S0Clock;
- break;
- case chipcHw_CLOCK_RTBUS:
- pClockCtrl = &pChipcHw->RTBUSClock;
- pDependentClock = &pChipcHw->ACLKClock;
- dependentClockType = NON_PLL_CLOCK;
- break;
- case chipcHw_CLOCK_APM100:
- pClockCtrl = &pChipcHw->APM100Clock;
- pDependentClock = &pChipcHw->APMClock;
- vcoHz = vcoFreqPll2Hz;
- dependentClockType = PLL_CLOCK;
- break;
- case chipcHw_CLOCK_TSC:
- pClockCtrl = &pChipcHw->TSCClock;
- break;
- case chipcHw_CLOCK_LED:
- pClockCtrl = &pChipcHw->LEDClock;
- break;
- case chipcHw_CLOCK_I2S1:
- pClockCtrl = &pChipcHw->I2S1Clock;
- break;
- }
-
- if (pPLLReg) {
- /* Obtain PLL clock frequency */
- if (readl(pPLLReg) & chipcHw_REG_PLL_CLOCK_BYPASS_SELECT) {
- /* Return crystal clock frequency when bypassed */
- return chipcHw_XTAL_FREQ_Hz;
- } else if (clock == chipcHw_CLOCK_DDR) {
- /* DDR frequency is configured in PLLDivider register */
- return chipcHw_divide (vcoHz, (((readl(&pChipcHw->PLLDivider) & 0xFF000000) >> 24) ? ((readl(&pChipcHw->PLLDivider) & 0xFF000000) >> 24) : 256));
- } else {
- /* From chip revision number B0, LCD clock is internally divided by 2 */
- if ((pPLLReg == &pChipcHw->LCDClock) && (chipcHw_getChipRevisionNumber() != chipcHw_REV_NUMBER_A0)) {
- vcoHz >>= 1;
- }
- /* Obtain PLL clock frequency using VCO dividers */
- return chipcHw_divide(vcoHz, ((readl(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (readl(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) : 256));
- }
- } else if (pClockCtrl) {
- /* Obtain divider clock frequency */
- uint32_t div;
- uint32_t freq = 0;
-
- if (readl(pClockCtrl) & chipcHw_REG_DIV_CLOCK_BYPASS_SELECT) {
- /* Return crystal clock frequency when bypassed */
- return chipcHw_XTAL_FREQ_Hz;
- } else if (pDependentClock) {
- /* Identify the dependent clock frequency */
- switch (dependentClockType) {
- case PLL_CLOCK:
- if (readl(pDependentClock) & chipcHw_REG_PLL_CLOCK_BYPASS_SELECT) {
- /* Use crystal clock frequency when dependent PLL clock is bypassed */
- freq = chipcHw_XTAL_FREQ_Hz;
- } else {
- /* Obtain PLL clock frequency using VCO dividers */
- div = readl(pDependentClock) & chipcHw_REG_PLL_CLOCK_MDIV_MASK;
- freq = div ? chipcHw_divide(vcoHz, div) : 0;
- }
- break;
- case NON_PLL_CLOCK:
- if (pDependentClock == &pChipcHw->ACLKClock) {
- freq = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS);
- } else {
- if (readl(pDependentClock) & chipcHw_REG_DIV_CLOCK_BYPASS_SELECT) {
- /* Use crystal clock frequency when dependent divider clock is bypassed */
- freq = chipcHw_XTAL_FREQ_Hz;
- } else {
- /* Obtain divider clock frequency using XTAL dividers */
- div = readl(pDependentClock) & chipcHw_REG_DIV_CLOCK_DIV_MASK;
- freq = chipcHw_divide (chipcHw_XTAL_FREQ_Hz, (div ? div : 256));
- }
- }
- break;
- }
- } else {
- /* Dependent on crystal clock */
- freq = chipcHw_XTAL_FREQ_Hz;
- }
-
- div = readl(pClockCtrl) & chipcHw_REG_DIV_CLOCK_DIV_MASK;
- return chipcHw_divide(freq, (div ? div : 256));
- }
- return 0;
-}
-
-/****************************************************************************/
-/**
-* @brief Set clock fequency for miscellaneous configurable clocks
-*
-* This function sets clock frequency
-*
-* @return Configured clock frequency in Hz
-*
-*/
-/****************************************************************************/
-chipcHw_freq chipcHw_setClockFrequency(chipcHw_CLOCK_e clock, /* [ IN ] Configurable clock */
- uint32_t freq /* [ IN ] Clock frequency in Hz */
- ) {
- uint32_t __iomem *pPLLReg = NULL;
- uint32_t __iomem *pClockCtrl = NULL;
- uint32_t __iomem *pDependentClock = NULL;
- uint32_t vcoFreqPll1Hz = 0; /* Effective VCO frequency for PLL1 in Hz */
- uint32_t desVcoFreqPll1Hz = 0; /* Desired VCO frequency for PLL1 in Hz */
- uint32_t vcoFreqPll2Hz = 0; /* Effective VCO frequency for PLL2 in Hz */
- uint32_t dependentClockType = 0;
- uint32_t vcoHz = 0;
- uint32_t desVcoHz = 0;
-
- /* Get VCO frequencies */
- if ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_MASK) != chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER) {
- uint64_t adjustFreq = 0;
-
- vcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
-
- /* Adjusted frequency due to chipcHw_REG_PLL_DIVIDER_NDIV_f_SS */
- adjustFreq = (uint64_t) chipcHw_XTAL_FREQ_Hz *
- (uint64_t) chipcHw_REG_PLL_DIVIDER_NDIV_f_SS *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, (chipcHw_REG_PLL_PREDIVIDER_P2 * (uint64_t) chipcHw_REG_PLL_DIVIDER_FRAC));
- vcoFreqPll1Hz += (uint32_t) adjustFreq;
-
- /* Desired VCO frequency */
- desVcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- (((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT) + 1);
- } else {
- vcoFreqPll1Hz = desVcoFreqPll1Hz = chipcHw_XTAL_FREQ_Hz *
- chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
- }
- vcoFreqPll2Hz = chipcHw_XTAL_FREQ_Hz * chipcHw_divide(chipcHw_REG_PLL_PREDIVIDER_P1, chipcHw_REG_PLL_PREDIVIDER_P2) *
- ((readl(&pChipcHw->PLLPreDivider2) & chipcHw_REG_PLL_PREDIVIDER_NDIV_MASK) >>
- chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT);
-
- switch (clock) {
- case chipcHw_CLOCK_DDR:
- /* Configure the DDR_ctrl:BUS ratio settings */
- {
- REG_LOCAL_IRQ_SAVE;
- /* Dvide DDR_phy by two to obtain DDR_ctrl clock */
- writel((readl(&pChipcHw->DDRClock) & ~chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_MASK) | ((((freq / 2) / chipcHw_getClockFrequency(chipcHw_CLOCK_BUS)) - 1) << chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_SHIFT), &pChipcHw->DDRClock);
- REG_LOCAL_IRQ_RESTORE;
- }
- pPLLReg = &pChipcHw->DDRClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ARM:
- pPLLReg = &pChipcHw->ARMClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ESW:
- pPLLReg = &pChipcHw->ESWClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_VPM:
- /* Configure the VPM:BUS ratio settings */
- {
- REG_LOCAL_IRQ_SAVE;
- writel((readl(&pChipcHw->VPMClock) & ~chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_MASK) | ((chipcHw_divide (freq, chipcHw_getClockFrequency(chipcHw_CLOCK_BUS)) - 1) << chipcHw_REG_PLL_CLOCK_TO_BUS_RATIO_SHIFT), &pChipcHw->VPMClock);
- REG_LOCAL_IRQ_RESTORE;
- }
- pPLLReg = &pChipcHw->VPMClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ESW125:
- pPLLReg = &pChipcHw->ESW125Clock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_UART:
- pPLLReg = &pChipcHw->UARTClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SDIO0:
- pPLLReg = &pChipcHw->SDIO0Clock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SDIO1:
- pPLLReg = &pChipcHw->SDIO1Clock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_SPI:
- pPLLReg = &pChipcHw->SPIClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_ETM:
- pPLLReg = &pChipcHw->ETMClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- break;
- case chipcHw_CLOCK_USB:
- pPLLReg = &pChipcHw->USBClock;
- vcoHz = vcoFreqPll2Hz;
- desVcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_LCD:
- pPLLReg = &pChipcHw->LCDClock;
- vcoHz = vcoFreqPll2Hz;
- desVcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_APM:
- pPLLReg = &pChipcHw->APMClock;
- vcoHz = vcoFreqPll2Hz;
- desVcoHz = vcoFreqPll2Hz;
- break;
- case chipcHw_CLOCK_BUS:
- pClockCtrl = &pChipcHw->ACLKClock;
- pDependentClock = &pChipcHw->ARMClock;
- vcoHz = vcoFreqPll1Hz;
- desVcoHz = desVcoFreqPll1Hz;
- dependentClockType = PLL_CLOCK;
- break;
- case chipcHw_CLOCK_OTP:
- pClockCtrl = &pChipcHw->OTPClock;
- break;
- case chipcHw_CLOCK_I2C:
- pClockCtrl = &pChipcHw->I2CClock;
- break;
- case chipcHw_CLOCK_I2S0:
- pClockCtrl = &pChipcHw->I2S0Clock;
- break;
- case chipcHw_CLOCK_RTBUS:
- pClockCtrl = &pChipcHw->RTBUSClock;
- pDependentClock = &pChipcHw->ACLKClock;
- dependentClockType = NON_PLL_CLOCK;
- break;
- case chipcHw_CLOCK_APM100:
- pClockCtrl = &pChipcHw->APM100Clock;
- pDependentClock = &pChipcHw->APMClock;
- vcoHz = vcoFreqPll2Hz;
- desVcoHz = vcoFreqPll2Hz;
- dependentClockType = PLL_CLOCK;
- break;
- case chipcHw_CLOCK_TSC:
- pClockCtrl = &pChipcHw->TSCClock;
- break;
- case chipcHw_CLOCK_LED:
- pClockCtrl = &pChipcHw->LEDClock;
- break;
- case chipcHw_CLOCK_I2S1:
- pClockCtrl = &pChipcHw->I2S1Clock;
- break;
- }
-
- if (pPLLReg) {
- /* Select XTAL as bypass source */
- reg32_modify_and(pPLLReg, ~chipcHw_REG_PLL_CLOCK_SOURCE_GPIO);
- reg32_modify_or(pPLLReg, chipcHw_REG_PLL_CLOCK_BYPASS_SELECT);
- /* For DDR settings use only the PLL divider clock */
- if (pPLLReg == &pChipcHw->DDRClock) {
- /* Set M1DIV for PLL1, which controls the DDR clock */
- reg32_write(&pChipcHw->PLLDivider, (readl(&pChipcHw->PLLDivider) & 0x00FFFFFF) | ((chipcHw_REG_PLL_DIVIDER_MDIV (desVcoHz, freq)) << 24));
- /* Calculate expected frequency */
- freq = chipcHw_divide(vcoHz, (((readl(&pChipcHw->PLLDivider) & 0xFF000000) >> 24) ? ((readl(&pChipcHw->PLLDivider) & 0xFF000000) >> 24) : 256));
- } else {
- /* From chip revision number B0, LCD clock is internally divided by 2 */
- if ((pPLLReg == &pChipcHw->LCDClock) && (chipcHw_getChipRevisionNumber() != chipcHw_REV_NUMBER_A0)) {
- desVcoHz >>= 1;
- vcoHz >>= 1;
- }
- /* Set MDIV to change the frequency */
- reg32_modify_and(pPLLReg, ~(chipcHw_REG_PLL_CLOCK_MDIV_MASK));
- reg32_modify_or(pPLLReg, chipcHw_REG_PLL_DIVIDER_MDIV(desVcoHz, freq));
- /* Calculate expected frequency */
- freq = chipcHw_divide(vcoHz, ((readl(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (readl(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) : 256));
- }
- /* Wait for for atleast 200ns as per the protocol to change frequency */
- udelay(1);
- /* Do not bypass */
- reg32_modify_and(pPLLReg, ~chipcHw_REG_PLL_CLOCK_BYPASS_SELECT);
- /* Return the configured frequency */
- return freq;
- } else if (pClockCtrl) {
- uint32_t divider = 0;
-
- /* Divider clock should not be bypassed */
- reg32_modify_and(pClockCtrl,
- ~chipcHw_REG_DIV_CLOCK_BYPASS_SELECT);
-
- /* Identify the clock source */
- if (pDependentClock) {
- switch (dependentClockType) {
- case PLL_CLOCK:
- divider = chipcHw_divide(chipcHw_divide (desVcoHz, (readl(pDependentClock) & chipcHw_REG_PLL_CLOCK_MDIV_MASK)), freq);
- break;
- case NON_PLL_CLOCK:
- {
- uint32_t sourceClock = 0;
-
- if (pDependentClock == &pChipcHw->ACLKClock) {
- sourceClock = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS);
- } else {
- uint32_t div = readl(pDependentClock) & chipcHw_REG_DIV_CLOCK_DIV_MASK;
- sourceClock = chipcHw_divide (chipcHw_XTAL_FREQ_Hz, ((div) ? div : 256));
- }
- divider = chipcHw_divide(sourceClock, freq);
- }
- break;
- }
- } else {
- divider = chipcHw_divide(chipcHw_XTAL_FREQ_Hz, freq);
- }
-
- if (divider) {
- REG_LOCAL_IRQ_SAVE;
- /* Set the divider to obtain the required frequency */
- writel((readl(pClockCtrl) & (~chipcHw_REG_DIV_CLOCK_DIV_MASK)) | (((divider > 256) ? chipcHw_REG_DIV_CLOCK_DIV_256 : divider) & chipcHw_REG_DIV_CLOCK_DIV_MASK), pClockCtrl);
- REG_LOCAL_IRQ_RESTORE;
- return freq;
- }
- }
-
- return 0;
-}
-
-EXPORT_SYMBOL(chipcHw_setClockFrequency);
-
-/****************************************************************************/
-/**
-* @brief Set VPM clock in sync with BUS clock for Chip Rev #A0
-*
-* This function does the phase adjustment between VPM and BUS clock
-*
-* @return >= 0 : On success (# of adjustment required)
-* -1 : On failure
-*
-*/
-/****************************************************************************/
-static int vpmPhaseAlignA0(void)
-{
- uint32_t phaseControl;
- uint32_t phaseValue;
- uint32_t prevPhaseComp;
- int iter = 0;
- int adjustCount = 0;
- int count = 0;
-
- for (iter = 0; (iter < MAX_PHASE_ALIGN_ATTEMPTS) && (adjustCount < MAX_PHASE_ADJUST_COUNT); iter++) {
- phaseControl = (readl(&pChipcHw->VPMClock) & chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK) >> chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT;
- phaseValue = 0;
- prevPhaseComp = 0;
-
- /* Step 1: Look for falling PH_COMP transition */
-
- /* Read the contents of VPM Clock resgister */
- phaseValue = readl(&pChipcHw->VPMClock);
- do {
- /* Store previous value of phase comparator */
- prevPhaseComp = phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP;
- /* Change the value of PH_CTRL. */
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- /* Read the contents of VPM Clock resgister. */
- phaseValue = readl(&pChipcHw->VPMClock);
-
- if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0x0) {
- phaseControl = (0x3F & (phaseControl - 1));
- } else {
- /* Increment to the Phase count value for next write, if Phase is not stable. */
- phaseControl = (0x3F & (phaseControl + 1));
- }
- /* Count number of adjustment made */
- adjustCount++;
- } while (((prevPhaseComp == (phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP)) || /* Look for a transition */
- ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) != 0x0)) && /* Look for a falling edge */
- (adjustCount < MAX_PHASE_ADJUST_COUNT) /* Do not exceed the limit while trying */
- );
-
- if (adjustCount >= MAX_PHASE_ADJUST_COUNT) {
- /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */
- return -1;
- }
-
- /* Step 2: Keep moving forward to make sure falling PH_COMP transition was valid */
-
- for (count = 0; (count < 5) && ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0); count++) {
- phaseControl = (0x3F & (phaseControl + 1));
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- phaseValue = readl(&pChipcHw->VPMClock);
- /* Count number of adjustment made */
- adjustCount++;
- }
-
- if (adjustCount >= MAX_PHASE_ADJUST_COUNT) {
- /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */
- return -1;
- }
-
- if (count != 5) {
- /* Detected false transition */
- continue;
- }
-
- /* Step 3: Keep moving backward to make sure falling PH_COMP transition was stable */
-
- for (count = 0; (count < 3) && ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0); count++) {
- phaseControl = (0x3F & (phaseControl - 1));
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- phaseValue = readl(&pChipcHw->VPMClock);
- /* Count number of adjustment made */
- adjustCount++;
- }
-
- if (adjustCount >= MAX_PHASE_ADJUST_COUNT) {
- /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */
- return -1;
- }
-
- if (count != 3) {
- /* Detected noisy transition */
- continue;
- }
-
- /* Step 4: Keep moving backward before the original transition took place. */
-
- for (count = 0; (count < 5); count++) {
- phaseControl = (0x3F & (phaseControl - 1));
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- phaseValue = readl(&pChipcHw->VPMClock);
- /* Count number of adjustment made */
- adjustCount++;
- }
-
- if (adjustCount >= MAX_PHASE_ADJUST_COUNT) {
- /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */
- return -1;
- }
-
- if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0) {
- /* Detected false transition */
- continue;
- }
-
- /* Step 5: Re discover the valid transition */
-
- do {
- /* Store previous value of phase comparator */
- prevPhaseComp = phaseValue;
- /* Change the value of PH_CTRL. */
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- /* Read the contents of VPM Clock resgister. */
- phaseValue = readl(&pChipcHw->VPMClock);
-
- if ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) == 0x0) {
- phaseControl = (0x3F & (phaseControl - 1));
- } else {
- /* Increment to the Phase count value for next write, if Phase is not stable. */
- phaseControl = (0x3F & (phaseControl + 1));
- }
-
- /* Count number of adjustment made */
- adjustCount++;
- } while (((prevPhaseComp == (phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP)) || ((phaseValue & chipcHw_REG_PLL_CLOCK_PHASE_COMP) != 0x0)) && (adjustCount < MAX_PHASE_ADJUST_COUNT));
-
- if (adjustCount >= MAX_PHASE_ADJUST_COUNT) {
- /* Failed to align VPM phase after MAX_PHASE_ADJUST_COUNT tries */
- return -1;
- } else {
- /* Valid phase must have detected */
- break;
- }
- }
-
- /* For VPM Phase should be perfectly aligned. */
- phaseControl = (((readl(&pChipcHw->VPMClock) >> chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT) - 1) & 0x3F);
- {
- REG_LOCAL_IRQ_SAVE;
-
- writel((readl(&pChipcHw->VPMClock) & ~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT), &pChipcHw->VPMClock);
- /* Load new phase value */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
-
- REG_LOCAL_IRQ_RESTORE;
- }
- /* Return the status */
- return (int)adjustCount;
-}
-
-/****************************************************************************/
-/**
-* @brief Set VPM clock in sync with BUS clock
-*
-* This function does the phase adjustment between VPM and BUS clock
-*
-* @return >= 0 : On success (# of adjustment required)
-* -1 : On failure
-*
-*/
-/****************************************************************************/
-int chipcHw_vpmPhaseAlign(void)
-{
-
- if (chipcHw_getChipRevisionNumber() == chipcHw_REV_NUMBER_A0) {
- return vpmPhaseAlignA0();
- } else {
- uint32_t phaseControl = chipcHw_getVpmPhaseControl();
- uint32_t phaseValue = 0;
- int adjustCount = 0;
-
- /* Disable VPM access */
- writel(readl(&pChipcHw->Spare1) & ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE, &pChipcHw->Spare1);
- /* Disable HW VPM phase alignment */
- chipcHw_vpmHwPhaseAlignDisable();
- /* Enable SW VPM phase alignment */
- chipcHw_vpmSwPhaseAlignEnable();
- /* Adjust VPM phase */
- while (adjustCount < MAX_PHASE_ADJUST_COUNT) {
- phaseValue = chipcHw_getVpmHwPhaseAlignStatus();
-
- /* Adjust phase control value */
- if (phaseValue > 0xF) {
- /* Increment phase control value */
- phaseControl++;
- } else if (phaseValue < 0xF) {
- /* Decrement phase control value */
- phaseControl--;
- } else {
- /* Enable VPM access */
- writel(readl(&pChipcHw->Spare1) | chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE, &pChipcHw->Spare1);
- /* Return adjust count */
- return adjustCount;
- }
- /* Change the value of PH_CTRL. */
- reg32_write(&pChipcHw->VPMClock,
- (readl(&pChipcHw->VPMClock) & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
- /* Wait atleast 20 ns */
- udelay(1);
- /* Toggle the LOAD_CH after phase control is written. */
- writel(readl(&pChipcHw->VPMClock) ^ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE, &pChipcHw->VPMClock);
- /* Count adjustment */
- adjustCount++;
- }
- }
-
- /* Disable VPM access */
- writel(readl(&pChipcHw->Spare1) & ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE, &pChipcHw->Spare1);
- return -1;
-}
-
-/****************************************************************************/
-/**
-* @brief Local Divide function
-*
-* This function does the divide
-*
-* @return divide value
-*
-*/
-/****************************************************************************/
-static int chipcHw_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;
-}
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