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Diffstat (limited to 'arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c')
-rw-r--r--arch/arm/mach-bcmring/csp/chipc/chipcHw_init.c293
1 files changed, 293 insertions, 0 deletions
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 00000000000..367df75d4bb
--- /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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 18:14:06 +0000