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Date: Fri, 3 Jul 2009 18:44:44 -0700
From: "Leo (Hao) Chen" <leochen@...adcom.com>
To: "linux-arm-kernel@...ts.arm.linux.org.uk"
<linux-arm-kernel@...ts.arm.linux.org.uk>,
"Linux Kernel" <linux-kernel@...r.kernel.org>
cc: "Russell King - ARM Linux" <linux@....linux.org.uk>,
"Alan Cox" <alan@...rguk.ukuu.org.uk>,
"Jean-Christophe PLAGNIOL-VILLARD" <plagnioj@...osoft.com>,
"Scott Branden" <sbranden@...adcom.com>,
"Leo (Hao) Chen" <leochen@...adcom.com>
Subject: [PATCH v2 14/18] new ARM SoC support: BCMRing
>From daede68e15a5580ae0d68bd7572144d04fec1d36 Mon Sep 17 00:00:00 2001
From: Leo Chen <leochen@...adcom.com>
Date: Fri, 3 Jul 2009 17:11:28 -0700
Subject: [PATCH 14/18] csp/chipc code
bcmring chipc block, csp functions including clock freq. setting, chipc
module init, PLL init, reset functions
Signed-off-by: Leo Chen <leochen@...adcom.com>
---
arch/arm/mach-bcmring/csp/chipc/Makefile | 1 +
arch/arm/mach-bcmring/csp/chipc/chipcHw.c | 782 ++++++++++++++++++++
.../mach-bcmring/csp/chipc/chipcHw_clkreconfig.c | 248 +++++++
arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c | 293 ++++++++
arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c | 125 ++++
arch/arm/mach-bcmring/csp/chipc/chipcHw_str.c | 64 ++
6 files changed, 1513 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-bcmring/csp/chipc/Makefile
create mode 100644 arch/arm/mach-bcmring/csp/chipc/chipcHw.c
create mode 100644 arch/arm/mach-bcmring/csp/chipc/chipcHw_clkreconfig.c
create mode 100644 arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c
create mode 100644 arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
create mode 100644 arch/arm/mach-bcmring/csp/chipc/chipcHw_str.c
diff --git a/arch/arm/mach-bcmring/csp/chipc/Makefile b/arch/arm/mach-bcmring/csp/chipc/Makefile
new file mode 100644
index 0000000..6739527
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/Makefile
@@ -0,0 +1 @@
+obj-y += chipcHw.o chipcHw_str.o chipcHw_reset.o chipcHw_init.o
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw.c
new file mode 100644
index 0000000..b71048c
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw.c
@@ -0,0 +1,782 @@
+/*****************************************************************************
+* 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 <csp/errno.h>
+#include <csp/stdint.h>
+#include <csp/module.h>
+
+#include <mach/csp/chipcHw_def.h>
+#include <mach/csp/chipcHw_inline.h>
+
+#include <csp/reg.h>
+#include <csp/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 */
+
+#define WAIT() do { \
+ asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); \
+ asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); \
+ asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); asm("nop"); \
+ } while (0);
+
+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 */
+ ) {
+ volatile uint32_t *pPLLReg = (uint32_t *) 0x0;
+ volatile uint32_t *pClockCtrl = (uint32_t *) 0x0;
+ volatile uint32_t *pDependentClock = (uint32_t *) 0x0;
+ 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 ((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) *
+ ((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) *
+ ((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) *
+ ((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 (*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, (((pChipcHw->PLLDivider & 0xFF000000) >> 24) ? ((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, ((*pPLLReg & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (*pPLLReg & chipcHw_REG_PLL_CLOCK_MDIV_MASK) : 256));
+ }
+ } else if (pClockCtrl) {
+ /* Obtain divider clock frequency */
+ uint32_t div;
+ uint32_t freq = 0;
+
+ if (*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 (*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 = *pDependentClock & chipcHw_REG_PLL_CLOCK_MDIV_MASK;
+ freq = div ? chipcHw_divide(vcoHz, div) : 0;
+ }
+ break;
+ case NON_PLL_CLOCK:
+ if (pDependentClock == (uint32_t *) &pChipcHw->ACLKClock) {
+ freq = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS);
+ } else {
+ if (*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 = *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 = *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 */
+ ) {
+ volatile uint32_t *pPLLReg = (uint32_t *) 0x0;
+ volatile uint32_t *pClockCtrl = (uint32_t *) 0x0;
+ volatile uint32_t *pDependentClock = (uint32_t *) 0x0;
+ 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 ((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) *
+ ((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) *
+ (((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) *
+ ((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) *
+ ((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 */
+ pChipcHw->DDRClock = (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);
+ 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;
+ pChipcHw->VPMClock = (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);
+ 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, (pChipcHw->PLLDivider & 0x00FFFFFF) | ((chipcHw_REG_PLL_DIVIDER_MDIV (desVcoHz, freq)) << 24));
+ /* Calculate expected frequency */
+ freq = chipcHw_divide(vcoHz, (((pChipcHw->PLLDivider & 0xFF000000) >> 24) ? ((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, ((*(pPLLReg) & chipcHw_REG_PLL_CLOCK_MDIV_MASK) ? (*(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, (*pDependentClock & chipcHw_REG_PLL_CLOCK_MDIV_MASK)), freq);
+ break;
+ case NON_PLL_CLOCK:
+ {
+ uint32_t sourceClock = 0;
+
+ if (pDependentClock == (uint32_t *) &pChipcHw->ACLKClock) {
+ sourceClock = chipcHw_getClockFrequency (chipcHw_CLOCK_BUS);
+ } else {
+ uint32_t div = *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 */
+ *pClockCtrl = (*pClockCtrl & (~chipcHw_REG_DIV_CLOCK_DIV_MASK)) | (((divider > 256) ? chipcHw_REG_DIV_CLOCK_DIV_256 : divider) & chipcHw_REG_DIV_CLOCK_DIV_MASK);
+ 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 = (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 = 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, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ /* Read the contents of VPM Clock resgister. */
+ phaseValue = 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, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ phaseValue = 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, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ phaseValue = 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, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ phaseValue = 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, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^=
+ chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ /* Read the contents of VPM Clock resgister. */
+ phaseValue = 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 = (((pChipcHw->VPMClock >> chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT) - 1) & 0x3F);
+ {
+ REG_LOCAL_IRQ_SAVE;
+
+ pChipcHw->VPMClock = (pChipcHw->VPMClock & ~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT);
+ /* Load new phase value */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+
+ 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 */
+ pChipcHw->Spare1 &= ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE;
+ /* 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 */
+ pChipcHw->Spare1 |= chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE;
+ /* Return adjust count */
+ return adjustCount;
+ }
+ /* Change the value of PH_CTRL. */
+ reg32_write(&pChipcHw->VPMClock, (pChipcHw->VPMClock & (~chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_MASK)) | (phaseControl << chipcHw_REG_PLL_CLOCK_PHASE_CONTROL_SHIFT));
+ /* Wait atleast 20 ns */
+ WAIT();
+ /* Toggle the LOAD_CH after phase control is written. */
+ pChipcHw->VPMClock ^= chipcHw_REG_PLL_CLOCK_PHASE_UPDATE_ENABLE;
+ /* Count adjustment */
+ adjustCount++;
+ }
+ }
+
+ /* Disable VPM access */
+ pChipcHw->Spare1 &= ~chipcHw_REG_SPARE1_VPM_BUS_ACCESS_ENABLE;
+ 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;
+ }
+
+ /* Intialize 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;
+}
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw_clkreconfig.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw_clkreconfig.c
new file mode 100644
index 0000000..9ad1ae9
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw_clkreconfig.c
@@ -0,0 +1,248 @@
+/*****************************************************************************
+* 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.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/stdint.h>
+
+#include <mach/csp/chipcHw_def.h>
+#include <mach/csp/chipcHw_inline.h>
+#include <mach/csp/sdramHw_phaseAlign.h>
+#include <csp/intcHw.h>
+#include <csp/vpmHw.h>
+#include <csp/cache.h>
+#include <csp/delay.h>
+
+/* ---- Private Constants and Types --------------------------------------- */
+/* The following varaibles are defined in the linker file which contain the
+ * start and end address of the aramtext section. The aramtext section links to
+ * DDR and however is relocatable and can be executed completely within ARAM */
+char _aramtext_start, _aramtext_end;
+
+#define ARAM_STACKSIZE 0x400
+
+/* ---- Private Variables ------------------------------------------------- */
+void chipcHw_run_from_aram(uint32_t busHz, uint32_t armRatio, uint32_t vpmRatio,
+ uint32_t ddrRatio)
+ __attribute__ ((section(".aramtext")));
+
+typedef void (*RUNFUNC) (uint32_t busHz, uint32_t armRatio, uint32_t vpmRatio,
+ uint32_t ddrRatio);
+
+/*
+ * Get current state.
+ */
+static inline uint32_t get_flags(void)
+{
+ uint32_t flags;
+
+ __asm__ __volatile__("mrs %0, cpsr " : "=r"(flags) : : "memory", "cc");
+ return flags;
+}
+
+/*
+ * restore saved state
+ */
+static inline void restore_flags(uint32_t flags)
+{
+ __asm__ __volatile__("msr cpsr_c, %0 " : : "r"(flags) : "memory", "cc");
+}
+
+/*
+ * Enable IRQs
+ */
+static inline void enable_irq(void)
+{
+ uint32_t flags = get_flags();
+ /* clear IRQ disable bit (enable IRQ) */
+ flags &= ~0x00000080;
+ restore_flags(flags);
+}
+
+/*
+ * Disable IRQs
+ */
+static inline void disable_irq(void)
+{
+ uint32_t flags = get_flags();
+ /* set IRQ disable bit (disable IRQ) */
+ flags |= 0x00000080;
+ restore_flags(flags);
+}
+
+/*
+ * Enable FIQs
+ */
+static inline void enable_fiq(void)
+{
+ uint32_t flags = get_flags();
+ /* clear FIQ disable bit (enable FIQ) */
+ flags &= ~0x00000040;
+ restore_flags(flags);
+}
+
+/*
+ * Disable FIQs
+ */
+static inline void disable_fiq(void)
+{
+ uint32_t flags = get_flags();
+ /* set FIQ disable bit (disable FIQ) */
+ flags |= 0x00000040;
+ restore_flags(flags);
+}
+
+/****************************************************************************/
+/**
+* @brief chipcHw_clockReconfig
+*
+* @note chipcHw_clockReconfig configures the clock.
+* To do so it needs to copy the code into internal
+* memory to change the ARM clock and not execute from DDR.
+* ARAM is used for code and stack. The contents of ARAM are not
+* preserved.
+*/
+/****************************************************************************/
+void chipcHw_clockReconfig(uint32_t busHz, uint32_t armRatio, uint32_t vpmRatio,
+ uint32_t ddrRatio)
+{
+ RUNFUNC runFunc;
+ char *src;
+ char *dst;
+ unsigned int *stackFill;
+ unsigned long flags;
+
+ /* Disable IRQ and FIQ */
+ flags = get_flags();
+ disable_irq();
+ disable_fiq();
+ {
+ REG_LOCAL_IRQ_SAVE;
+
+ /* Halt the VPM, prior to clock reconfiguration */
+ vpmHw_Halt();
+
+ src = &_aramtext_start;
+ dst = (char *)MM_IO_BASE_ARAM + ARAM_STACKSIZE;
+
+ /* Copy code currently in DDR to ARAM */
+ while (src < &_aramtext_end) {
+ *dst++ = *src++;
+ }
+
+ /* Fill Stack with known pattern to allow measurement of usage if required */
+ stackFill = (unsigned int *)MM_IO_BASE_ARAM;
+ while (stackFill <
+ (unsigned int *)(MM_IO_BASE_ARAM + ARAM_STACKSIZE)) {
+ *stackFill++ = 0xdeaddead;
+ }
+
+ /* -----------
+ * | |
+ * | |
+ * | | <- start run here; ARAM BASE + ARAM_STACKSIZE + (chipcHw_run_from_aram - _aramtext_start)
+ * | |
+ * | code |
+ * |---------| <- ARAM BASE + ARAM_STACKSIZE
+ * | stack | /\
+ * | || | | Top of stack
+ * | || | |
+ * | || | | ARAM_STACKSIZE
+ * | \/ | |
+ * | | \/
+ * ----------- <- ARAM BASE (0x30100000)
+ * */
+
+ /* Save stack pointer in DDR to known location in ARAM */
+ asm(" ldr r2, =0x30100400-4 ");
+ asm(" str sp, [r2] ");
+ /* Use new stack pointer now located in ARAM */
+ asm(" ldr sp, =0x30100400-8 ");
+
+ /* Calculate the offset into ARAM to ensure that chipcHw_run_from_aram() is called */
+ runFunc =
+ (RUNFUNC) (unsigned long)MM_ADDR_IO_ARAM + ARAM_STACKSIZE +
+ (unsigned long)&chipcHw_run_from_aram -
+ (unsigned long)&_aramtext_start;
+
+ CSP_CACHE_FLUSH_ALL;
+
+ /* run the function from ARAM */
+ runFunc(busHz, armRatio, vpmRatio, ddrRatio);
+
+ /* Restore stack pointer in DDR */
+ asm(" ldr r2, =0x30100400-4 ");
+ asm(" ldr sp, [r2] ");
+
+ /* Re-enable the VPM */
+ vpmHw_Run();
+
+ REG_LOCAL_IRQ_RESTORE;
+ }
+ /* Re-enable IRQ and FIQ */
+ restore_flags(flags);
+}
+
+/****************************************************************************/
+/**
+* @brief chipcHw_run_from_aram
+*
+* @note This function must run from internal memory ARAM because DDR access
+* is restricted when the clocks are reconfigured. All of the functions and subfunctions
+* called in this routine, *must* be located in the .aramtext section
+* to ensure that DDR access does not occur.
+*/
+/****************************************************************************/
+void chipcHw_run_from_aram(uint32_t busHz, uint32_t armRatio, uint32_t vpmRatio,
+ uint32_t ddrRatio)
+{
+ chipcHw_INIT_PARAM_t param;
+ int uartHz = 0;
+
+ if (busHz == 166666666) {
+ param.pllVcoFreqHz = 2000000000; /* VCO must be integer multiple of bus. VCO = 12 * bus */
+ uartHz = 142857142; /* UART must be < 150MHz and multiple divided by VCO. UART = VCO / 14 */
+ } else if (busHz == 150000000) {
+ param.pllVcoFreqHz = 1800000000; /* VCO must be integer multiple of bus. VCO = 12 * bus */
+ uartHz = 138461538; /* UART must be < 150MHz and multiple divided by VCO. UART = VCO / 13 */
+ } else {
+ /* Bus speed not supported */
+ return;
+ }
+
+ param.pll2VcoFreqHz = 1800000000; /* Always 1.8GHz */
+
+ param.ssSupport = 0;
+ param.busClockFreqHz = busHz;
+ param.armBusRatio = armRatio; /* ARM Clock = Ratio * BUS Clock */
+ param.vpmBusRatio = vpmRatio; /* VPM Clock = Ratio * BUS Clock */
+ param.ddrBusRatio = ddrRatio; /* DDR Clock = Ratio * BUS Clock */
+
+ /* Disable branch prediction. Workaround for GNATS 8270 */
+ asm(" mrc p15, 0, r5, c1, c0, 0 "); /* read control reg */
+ asm(" and r5, r5, #0xFFFFF7FF "); /* branch prediction off for ARM11 */
+ asm(" mcr p15, 0, r5, c1, c0, 0 "); /* write control reg */
+
+ /* Program the PLL and major clocks */
+ chipcHw_Init(¶m);
+
+ /* Re-enable branch prediction. Workaround for GNATS 8270 */
+ asm(" mrc p15, 0, r5, c1, c0, 0 "); /* read control reg */
+ asm(" orr r5, r5, #0x800 "); /* branch prediction on for ARM11 */
+ asm(" mcr p15, 0, r5, c1, c0, 0 "); /* write control reg */
+
+ chipcHw_setClockFrequency(chipcHw_CLOCK_UART, uartHz);
+
+ /* Set DDR clock in sync with BUS clock */
+ sdramHw_phaseAlignLowLevel();
+}
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c
new file mode 100644
index 0000000..367df75
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c
@@ -0,0 +1,293 @@
+/*****************************************************************************
+* 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_init.c
+*
+* @brief Low level CHIPC PLL configuration functions
+*
+* @note
+*
+* These routines provide basic PLL controlling functionality only.
+*/
+/****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+
+#include <csp/errno.h>
+#include <csp/stdint.h>
+#include <csp/module.h>
+
+#include <mach/csp/chipcHw_def.h>
+#include <mach/csp/chipcHw_inline.h>
+
+#include <csp/reg.h>
+#include <csp/delay.h>
+/* ---- Private Constants and Types --------------------------------------- */
+
+/*
+ Calculation for NDIV_i to obtain VCO frequency
+ -----------------------------------------------
+
+ Freq_vco = Freq_ref * (P2 / P1) * (PLL_NDIV_i + PLL_NDIV_f)
+ for Freq_vco = VCO_FREQ_MHz
+ Freq_ref = chipcHw_XTAL_FREQ_Hz
+ PLL_P1 = PLL_P2 = 1
+ and
+ PLL_NDIV_f = 0
+
+ We get:
+ PLL_NDIV_i = Freq_vco / Freq_ref = VCO_FREQ_MHz / chipcHw_XTAL_FREQ_Hz
+
+ Calculation for PLL MDIV to obtain frequency Freq_x for channel x
+ -----------------------------------------------------------------
+ Freq_x = chipcHw_XTAL_FREQ_Hz * PLL_NDIV_i / PLL_MDIV_x = VCO_FREQ_MHz / PLL_MDIV_x
+
+ PLL_MDIV_x = VCO_FREQ_MHz / Freq_x
+*/
+
+/* ---- Private Variables ------------------------------------------------- */
+/****************************************************************************/
+/**
+* @brief Initializes the PLL2
+*
+* This function initializes the PLL2
+*
+*/
+/****************************************************************************/
+void chipcHw_pll2Enable(uint32_t vcoFreqHz)
+{
+ uint32_t pllPreDivider2 = 0;
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ pChipcHw->PLLConfig2 =
+ chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET;
+
+ pllPreDivider2 = chipcHw_REG_PLL_PREDIVIDER_POWER_DOWN |
+ chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER |
+ (chipcHw_REG_PLL_PREDIVIDER_NDIV_i(vcoFreqHz) <<
+ chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P1 <<
+ chipcHw_REG_PLL_PREDIVIDER_P1_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P2 <<
+ chipcHw_REG_PLL_PREDIVIDER_P2_SHIFT);
+
+ /* Enable CHIPC registers to control the PLL */
+ pChipcHw->PLLStatus |= chipcHw_REG_PLL_STATUS_CONTROL_ENABLE;
+
+ /* Set pre divider to get desired VCO frequency */
+ pChipcHw->PLLPreDivider2 = pllPreDivider2;
+ /* Set NDIV Frac */
+ pChipcHw->PLLDivider2 = chipcHw_REG_PLL_DIVIDER_NDIV_f;
+
+ /* This has to be removed once the default values are fixed for PLL2. */
+ pChipcHw->PLLControl12 = 0x38000700;
+ pChipcHw->PLLControl22 = 0x00000015;
+
+ /* Reset PLL2 */
+ if (vcoFreqHz > chipcHw_REG_PLL_CONFIG_VCO_SPLIT_FREQ) {
+ pChipcHw->PLLConfig2 = chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_VCO_1601_3200 |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN;
+ } else {
+ pChipcHw->PLLConfig2 = chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_VCO_800_1600 |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN;
+ }
+ REG_LOCAL_IRQ_RESTORE;
+ }
+
+ /* Insert certain amount of delay before deasserting ARESET. */
+ udelay(1);
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ /* Remove analog reset and Power on the PLL */
+ pChipcHw->PLLConfig2 &=
+ ~(chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN);
+
+ REG_LOCAL_IRQ_RESTORE;
+
+ }
+
+ /* Wait until PLL is locked */
+ while (!(pChipcHw->PLLStatus2 & chipcHw_REG_PLL_STATUS_LOCKED))
+ ;
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ /* Remove digital reset */
+ pChipcHw->PLLConfig2 &= ~chipcHw_REG_PLL_CONFIG_D_RESET;
+
+ REG_LOCAL_IRQ_RESTORE;
+ }
+}
+
+EXPORT_SYMBOL(chipcHw_pll2Enable);
+
+/****************************************************************************/
+/**
+* @brief Initializes the PLL1
+*
+* This function initializes the PLL1
+*
+*/
+/****************************************************************************/
+void chipcHw_pll1Enable(uint32_t vcoFreqHz, chipcHw_SPREAD_SPECTRUM_e ssSupport)
+{
+ uint32_t pllPreDivider = 0;
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+
+ pChipcHw->PLLConfig =
+ chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET;
+ /* Setting VCO frequency */
+ if (ssSupport == chipcHw_SPREAD_SPECTRUM_ALLOW) {
+ pllPreDivider =
+ chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_MASH_1_8 |
+ ((chipcHw_REG_PLL_PREDIVIDER_NDIV_i(vcoFreqHz) -
+ 1) << chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P1 <<
+ chipcHw_REG_PLL_PREDIVIDER_P1_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P2 <<
+ chipcHw_REG_PLL_PREDIVIDER_P2_SHIFT);
+ } else {
+ pllPreDivider = chipcHw_REG_PLL_PREDIVIDER_POWER_DOWN |
+ chipcHw_REG_PLL_PREDIVIDER_NDIV_MODE_INTEGER |
+ (chipcHw_REG_PLL_PREDIVIDER_NDIV_i(vcoFreqHz) <<
+ chipcHw_REG_PLL_PREDIVIDER_NDIV_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P1 <<
+ chipcHw_REG_PLL_PREDIVIDER_P1_SHIFT) |
+ (chipcHw_REG_PLL_PREDIVIDER_P2 <<
+ chipcHw_REG_PLL_PREDIVIDER_P2_SHIFT);
+ }
+
+ /* Enable CHIPC registers to control the PLL */
+ pChipcHw->PLLStatus |= chipcHw_REG_PLL_STATUS_CONTROL_ENABLE;
+
+ /* Set pre divider to get desired VCO frequency */
+ pChipcHw->PLLPreDivider = pllPreDivider;
+ /* Set NDIV Frac */
+ if (ssSupport == chipcHw_SPREAD_SPECTRUM_ALLOW) {
+ pChipcHw->PLLDivider = chipcHw_REG_PLL_DIVIDER_M1DIV |
+ chipcHw_REG_PLL_DIVIDER_NDIV_f_SS;
+ } else {
+ pChipcHw->PLLDivider = chipcHw_REG_PLL_DIVIDER_M1DIV |
+ chipcHw_REG_PLL_DIVIDER_NDIV_f;
+ }
+
+ /* Reset PLL1 */
+ if (vcoFreqHz > chipcHw_REG_PLL_CONFIG_VCO_SPLIT_FREQ) {
+ pChipcHw->PLLConfig = chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_VCO_1601_3200 |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN;
+ } else {
+ pChipcHw->PLLConfig = chipcHw_REG_PLL_CONFIG_D_RESET |
+ chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_VCO_800_1600 |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN;
+ }
+
+ REG_LOCAL_IRQ_RESTORE;
+
+ /* Insert certain amount of delay before deasserting ARESET. */
+ udelay(1);
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ /* Remove analog reset and Power on the PLL */
+ pChipcHw->PLLConfig &=
+ ~(chipcHw_REG_PLL_CONFIG_A_RESET |
+ chipcHw_REG_PLL_CONFIG_POWER_DOWN);
+ REG_LOCAL_IRQ_RESTORE;
+ }
+
+ /* Wait until PLL is locked */
+ while (!(pChipcHw->PLLStatus & chipcHw_REG_PLL_STATUS_LOCKED)
+ || !(pChipcHw->
+ PLLStatus2 & chipcHw_REG_PLL_STATUS_LOCKED))
+ ;
+
+ /* Remove digital reset */
+ {
+ REG_LOCAL_IRQ_SAVE;
+ pChipcHw->PLLConfig &= ~chipcHw_REG_PLL_CONFIG_D_RESET;
+ REG_LOCAL_IRQ_RESTORE;
+ }
+ }
+}
+
+EXPORT_SYMBOL(chipcHw_pll1Enable);
+
+/****************************************************************************/
+/**
+* @brief Initializes the chipc module
+*
+* This function initializes the PLLs and core system clocks
+*
+*/
+/****************************************************************************/
+
+void chipcHw_Init(chipcHw_INIT_PARAM_t *initParam /* [ IN ] Misc chip initialization parameter */
+ ) {
+#if !(defined(__KERNEL__) && !defined(STANDALONE))
+ delay_init();
+#endif
+
+ /* Do not program PLL, when warm reset */
+ if (!(chipcHw_getStickyBits() & chipcHw_REG_STICKY_CHIP_WARM_RESET)) {
+ chipcHw_pll1Enable(initParam->pllVcoFreqHz,
+ initParam->ssSupport);
+ chipcHw_pll2Enable(initParam->pll2VcoFreqHz);
+ } else {
+ /* Clear sticky bits */
+ chipcHw_clearStickyBits(chipcHw_REG_STICKY_CHIP_WARM_RESET);
+ }
+ /* Clear sticky bits */
+ chipcHw_clearStickyBits(chipcHw_REG_STICKY_CHIP_SOFT_RESET);
+
+ /* Before configuring the ARM clock, atleast we need to make sure BUS clock maintains the proper ratio with ARM clock */
+ pChipcHw->ACLKClock =
+ (pChipcHw->
+ ACLKClock & ~chipcHw_REG_ACLKClock_CLK_DIV_MASK) | (initParam->
+ armBusRatio &
+ chipcHw_REG_ACLKClock_CLK_DIV_MASK);
+
+ /* Set various core component frequencies. The order in which this is done is important for some. */
+ /* The RTBUS (DDR PHY) is derived from the BUS, and the BUS from the ARM, and VPM needs to know BUS */
+ /* frequency to find its ratio with the BUS. Hence we must set the ARM first, followed by the BUS, */
+ /* then VPM and RTBUS. */
+
+ chipcHw_setClockFrequency(chipcHw_CLOCK_ARM,
+ initParam->busClockFreqHz *
+ initParam->armBusRatio);
+ chipcHw_setClockFrequency(chipcHw_CLOCK_BUS, initParam->busClockFreqHz);
+ chipcHw_setClockFrequency(chipcHw_CLOCK_VPM,
+ initParam->busClockFreqHz *
+ initParam->vpmBusRatio);
+ chipcHw_setClockFrequency(chipcHw_CLOCK_DDR,
+ initParam->busClockFreqHz *
+ initParam->ddrBusRatio);
+ chipcHw_setClockFrequency(chipcHw_CLOCK_RTBUS,
+ initParam->busClockFreqHz / 2);
+}
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
new file mode 100644
index 0000000..0692d5f
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw_reset.c
@@ -0,0 +1,125 @@
+/*****************************************************************************
+* 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.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/stdint.h>
+#include <mach/csp/chipcHw_def.h>
+#include <mach/csp/chipcHw_inline.h>
+#include <csp/intcHw.h>
+#include <csp/cache.h>
+
+/* ---- Private Constants and Types --------------------------------------- */
+/* ---- Private Variables ------------------------------------------------- */
+void chipcHw_reset_run_from_aram(void);
+
+typedef void (*RUNFUNC) (void);
+
+/****************************************************************************/
+/**
+* @brief warmReset
+*
+* @note warmReset configures the clocks which are not reset back to the state
+* required to execute on reset. To do so we need to copy the code into internal
+* memory to change the ARM clock while we are not executing from DDR.
+*/
+/****************************************************************************/
+void chipcHw_reset(uint32_t mask)
+{
+ int i = 0;
+ RUNFUNC runFunc = (RUNFUNC) (unsigned long)MM_ADDR_IO_ARAM;
+
+ /* Disable all interrupts */
+ intcHw_irq_disable(INTCHW_INTC0, 0xffffffff);
+ intcHw_irq_disable(INTCHW_INTC1, 0xffffffff);
+ intcHw_irq_disable(INTCHW_SINTC, 0xffffffff);
+
+ {
+ REG_LOCAL_IRQ_SAVE;
+ if (mask & chipcHw_REG_SOFT_RESET_CHIP_SOFT) {
+ chipcHw_softReset(chipcHw_REG_SOFT_RESET_CHIP_SOFT);
+ }
+ /* Bypass the PLL clocks before reboot */
+ pChipcHw->UARTClock |= chipcHw_REG_PLL_CLOCK_BYPASS_SELECT;
+ pChipcHw->SPIClock |= chipcHw_REG_PLL_CLOCK_BYPASS_SELECT;
+
+ /* Copy the chipcHw_warmReset_run_from_aram function into ARAM */
+ do {
+ ((uint32_t *) MM_IO_BASE_ARAM)[i] =
+ ((uint32_t *) &chipcHw_reset_run_from_aram)[i];
+ i++;
+ } while (((uint32_t *) MM_IO_BASE_ARAM)[i - 1] != 0xe1a0f00f); /* 0xe1a0f00f == asm ("mov r15, r15"); */
+
+ CSP_CACHE_FLUSH_ALL;
+
+ /* run the function from ARAM */
+ runFunc();
+
+ /* Code will never get here, but include it to balance REG_LOCAL_IRQ_SAVE above */
+ REG_LOCAL_IRQ_RESTORE;
+ }
+}
+
+/* This function must run from internal memory */
+void chipcHw_reset_run_from_aram(void)
+{
+/* Make sure, pipeline is filled with instructions coming from ARAM */
+ asm(" nop ");
+ asm(" nop ");
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ asm(" MRC p15,#0x0,r0,c1,c0,#0 ");
+ asm(" BIC r0,r0,#0xd ");
+ asm(" MCR p15,#0x0,r0,c1,c0,#0 ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+#endif
+ asm(" nop ");
+ asm(" nop ");
+ /* Bypass the ARM clock and switch to XTAL clock */
+ asm(" MOV r2,#0x80000000 ");
+ asm(" LDR r3,[r2,#8] ");
+ asm(" ORR r3,r3,#0x20000 ");
+ asm(" STR r3,[r2,#8] ");
+
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ asm(" nop ");
+ /* Issue reset */
+ asm(" MOV r3,#0x2 ");
+ asm(" STR r3,[r2,#0x80] ");
+ /* End here */
+ asm(" MOV pc,pc ");
+/* 0xe1a0f00f == asm ("mov r15, r15"); */
+ ;
+}
diff --git a/arch/arm/mach-bcmring/csp/chipc/chipcHw_str.c b/arch/arm/mach-bcmring/csp/chipc/chipcHw_str.c
new file mode 100644
index 0000000..54ad964
--- /dev/null
+++ b/arch/arm/mach-bcmring/csp/chipc/chipcHw_str.c
@@ -0,0 +1,64 @@
+/*****************************************************************************
+* Copyright 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_str.c
+*
+* @brief Contains strings which are useful to linux and csp
+*
+* @note
+*/
+/****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+
+#include <mach/csp/chipcHw_inline.h>
+
+/* ---- Private Constants and Types --------------------------------------- */
+
+static const char *gMuxStr[] = {
+ "GPIO", /* 0 */
+ "KeyPad", /* 1 */
+ "I2C-Host", /* 2 */
+ "SPI", /* 3 */
+ "Uart", /* 4 */
+ "LED-Mtx-P", /* 5 */
+ "LED-Mtx-S", /* 6 */
+ "SDIO-0", /* 7 */
+ "SDIO-1", /* 8 */
+ "PCM", /* 9 */
+ "I2S", /* 10 */
+ "ETM", /* 11 */
+ "Debug", /* 12 */
+ "Misc", /* 13 */
+ "0xE", /* 14 */
+ "0xF", /* 15 */
+};
+
+/****************************************************************************/
+/**
+* @brief Retrieves a string representation of the mux setting for a pin.
+*
+* @return Pointer to a character string.
+*/
+/****************************************************************************/
+
+const char *chipcHw_getGpioPinFunctionStr(int pin)
+{
+ if ((pin < 0) || (pin >= chipcHw_GPIO_COUNT)) {
+ return "";
+ }
+
+ return gMuxStr[chipcHw_getGpioPinFunction(pin)];
+}
--
1.6.0.6
Leo Hao Chen
Software Engineer
Broadcom Canada Inc.
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