294 lines
9.3 KiB
C
294 lines
9.3 KiB
C
/*****************************************************************************
|
|
* 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);
|
|
}
|