upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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429 lines
10 KiB
429 lines
10 KiB
/*
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* (C) Copyright 2000
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <ppc_asm.tmpl>
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#include <ppc4xx.h>
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#include <asm/processor.h>
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/* ------------------------------------------------------------------------- */
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#define ONE_BILLION 1000000000
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#if defined(CONFIG_405GP) || defined(CONFIG_405CR)
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void get_sys_info (PPC405_SYS_INFO * sysInfo)
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{
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unsigned long pllmr;
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unsigned long sysClkPeriodPs = ONE_BILLION / (CONFIG_SYS_CLK_FREQ / 1000);
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uint pvr = get_pvr();
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unsigned long psr;
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unsigned long m;
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/*
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* Read PLL Mode register
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*/
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pllmr = mfdcr (pllmd);
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/*
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* Read Pin Strapping register
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*/
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psr = mfdcr (strap);
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/*
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* Determine FWD_DIV.
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*/
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sysInfo->pllFwdDiv = 8 - ((pllmr & PLLMR_FWD_DIV_MASK) >> 29);
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/*
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* Determine FBK_DIV.
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*/
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sysInfo->pllFbkDiv = ((pllmr & PLLMR_FB_DIV_MASK) >> 25);
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if (sysInfo->pllFbkDiv == 0) {
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sysInfo->pllFbkDiv = 16;
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}
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/*
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* Determine PLB_DIV.
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*/
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sysInfo->pllPlbDiv = ((pllmr & PLLMR_CPU_TO_PLB_MASK) >> 17) + 1;
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/*
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* Determine PCI_DIV.
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*/
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sysInfo->pllPciDiv = ((pllmr & PLLMR_PCI_TO_PLB_MASK) >> 13) + 1;
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/*
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* Determine EXTBUS_DIV.
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*/
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sysInfo->pllExtBusDiv = ((pllmr & PLLMR_EXB_TO_PLB_MASK) >> 11) + 2;
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/*
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* Determine OPB_DIV.
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*/
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sysInfo->pllOpbDiv = ((pllmr & PLLMR_OPB_TO_PLB_MASK) >> 15) + 1;
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/*
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* Check if PPC405GPr used (mask minor revision field)
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*/
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if ((pvr & 0xfffffff0) == (PVR_405GPR_RB & 0xfffffff0)) {
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/*
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* Determine FWD_DIV B (only PPC405GPr with new mode strapping).
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*/
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sysInfo->pllFwdDivB = 8 - (pllmr & PLLMR_FWDB_DIV_MASK);
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/*
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* Determine factor m depending on PLL feedback clock source
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*/
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if (!(psr & PSR_PCI_ASYNC_EN)) {
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if (psr & PSR_NEW_MODE_EN) {
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/*
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* sync pci clock used as feedback (new mode)
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*/
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m = 1 * sysInfo->pllFwdDivB * 2 * sysInfo->pllPciDiv;
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} else {
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/*
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* sync pci clock used as feedback (legacy mode)
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*/
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m = 1 * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv * sysInfo->pllPciDiv;
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}
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} else if (psr & PSR_NEW_MODE_EN) {
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if (psr & PSR_PERCLK_SYNC_MODE_EN) {
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/*
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* PerClk used as feedback (new mode)
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*/
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m = 1 * sysInfo->pllFwdDivB * 2 * sysInfo->pllExtBusDiv;
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} else {
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/*
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* CPU clock used as feedback (new mode)
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*/
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m = sysInfo->pllFbkDiv * sysInfo->pllFwdDiv;
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}
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} else if (sysInfo->pllExtBusDiv == sysInfo->pllFbkDiv) {
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/*
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* PerClk used as feedback (legacy mode)
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*/
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m = 1 * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv * sysInfo->pllExtBusDiv;
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} else {
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/*
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* PLB clock used as feedback (legacy mode)
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*/
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m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivB * sysInfo->pllPlbDiv;
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}
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sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs;
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sysInfo->freqProcessor = (sysInfo->freqVCOMhz * 1000000) / sysInfo->pllFwdDiv;
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sysInfo->freqPLB = (sysInfo->freqVCOMhz * 1000000) /
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(sysInfo->pllFwdDivB * sysInfo->pllPlbDiv);
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} else {
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/*
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* Check pllFwdDiv to see if running in bypass mode where the CPU speed
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* is equal to the 405GP SYS_CLK_FREQ. If not in bypass mode, check VCO
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* to make sure it is within the proper range.
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* spec: VCO = SYS_CLOCK x FBKDIV x PLBDIV x FWDDIV
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* Note freqVCO is calculated in Mhz to avoid errors introduced by rounding.
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*/
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if (sysInfo->pllFwdDiv == 1) {
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sysInfo->freqProcessor = CONFIG_SYS_CLK_FREQ;
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sysInfo->freqPLB = CONFIG_SYS_CLK_FREQ / sysInfo->pllPlbDiv;
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} else {
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sysInfo->freqVCOMhz = ( 1000000 *
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sysInfo->pllFwdDiv *
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sysInfo->pllFbkDiv *
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sysInfo->pllPlbDiv
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) / sysClkPeriodPs;
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if (sysInfo->freqVCOMhz >= VCO_MIN
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&& sysInfo->freqVCOMhz <= VCO_MAX) {
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sysInfo->freqPLB = (ONE_BILLION /
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((sysClkPeriodPs * 10) /
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sysInfo->pllFbkDiv)) * 10000;
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sysInfo->freqProcessor = sysInfo->freqPLB * sysInfo->pllPlbDiv;
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} else {
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printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n",
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sysInfo->freqVCOMhz);
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printf ("It must be between %d-%d MHz \a\n",
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VCO_MIN, VCO_MAX);
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printf ("PLL Mode reg : %8.8lx\a\n",
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pllmr);
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hang ();
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}
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}
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}
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}
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/********************************************
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* get_OPB_freq
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* return OPB bus freq in Hz
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*********************************************/
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ulong get_OPB_freq (void)
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{
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ulong val = 0;
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PPC405_SYS_INFO sys_info;
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get_sys_info (&sys_info);
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val = sys_info.freqPLB / sys_info.pllOpbDiv;
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return val;
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}
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/********************************************
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* get_PCI_freq
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* return PCI bus freq in Hz
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*********************************************/
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ulong get_PCI_freq (void)
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{
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ulong val;
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PPC405_SYS_INFO sys_info;
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get_sys_info (&sys_info);
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val = sys_info.freqPLB / sys_info.pllPciDiv;
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return val;
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}
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#elif defined(CONFIG_440)
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void get_sys_info (sys_info_t * sysInfo)
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{
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unsigned long strp0;
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unsigned long temp;
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unsigned long m;
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/* Extract configured divisors */
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strp0 = mfdcr( cpc0_strp0 );
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sysInfo->pllFwdDivA = 8 - ((strp0 & PLLSYS0_FWD_DIV_A_MASK) >> 15);
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sysInfo->pllFwdDivB = 8 - ((strp0 & PLLSYS0_FWD_DIV_B_MASK) >> 12);
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temp = (strp0 & PLLSYS0_FB_DIV_MASK) >> 18;
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sysInfo->pllFbkDiv = temp ? temp : 16;
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sysInfo->pllOpbDiv = 1 + ((strp0 & PLLSYS0_OPB_DIV_MASK) >> 10);
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sysInfo->pllExtBusDiv = 1 + ((strp0 & PLLSYS0_EPB_DIV_MASK) >> 8);
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/* Calculate 'M' based on feedback source */
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if( strp0 & PLLSYS0_EXTSL_MASK )
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m = sysInfo->pllExtBusDiv * sysInfo->pllOpbDiv * sysInfo->pllFwdDivB;
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else
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m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivA;
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/* Now calculate the individual clocks */
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sysInfo->freqVCOMhz = (m * CONFIG_SYS_CLK_FREQ) + (m>>1);
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sysInfo->freqProcessor = sysInfo->freqVCOMhz/sysInfo->pllFwdDivA;
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sysInfo->freqPLB = sysInfo->freqVCOMhz/sysInfo->pllFwdDivB;
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if( get_pvr() == PVR_440GP_RB ) /* Rev B divs an extra 2 -- geez! */
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sysInfo->freqPLB >>= 1;
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sysInfo->freqOPB = sysInfo->freqPLB/sysInfo->pllOpbDiv;
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sysInfo->freqEPB = sysInfo->freqOPB/sysInfo->pllExtBusDiv;
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}
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ulong get_OPB_freq (void)
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{
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sys_info_t sys_info;
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get_sys_info (&sys_info);
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return sys_info.freqOPB;
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}
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#elif defined(CONFIG_405)
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void get_sys_info (sys_info_t * sysInfo) {
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sysInfo->freqVCOMhz=3125000;
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sysInfo->freqProcessor=12*1000*1000;
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sysInfo->freqPLB=50*1000*1000;
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sysInfo->freqPCI=66*1000*1000;
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}
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#elif defined(CONFIG_405EP)
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void get_sys_info (PPC405_SYS_INFO * sysInfo)
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{
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unsigned long pllmr0;
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unsigned long pllmr1;
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unsigned long sysClkPeriodPs = ONE_BILLION / (CONFIG_SYS_CLK_FREQ / 1000);
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unsigned long m;
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unsigned long pllmr0_ccdv;
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/*
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* Read PLL Mode registers
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*/
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pllmr0 = mfdcr (cpc0_pllmr0);
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pllmr1 = mfdcr (cpc0_pllmr1);
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/*
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* Determine forward divider A
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*/
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sysInfo->pllFwdDiv = 8 - ((pllmr1 & PLLMR1_FWDVA_MASK) >> 16);
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/*
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* Determine forward divider B (should be equal to A)
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*/
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sysInfo->pllFwdDivB = 8 - ((pllmr1 & PLLMR1_FWDVB_MASK) >> 12);
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/*
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* Determine FBK_DIV.
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*/
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sysInfo->pllFbkDiv = ((pllmr1 & PLLMR1_FBMUL_MASK) >> 20);
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if (sysInfo->pllFbkDiv == 0) {
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sysInfo->pllFbkDiv = 16;
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}
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/*
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* Determine PLB_DIV.
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*/
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sysInfo->pllPlbDiv = ((pllmr0 & PLLMR0_CPU_TO_PLB_MASK) >> 16) + 1;
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/*
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* Determine PCI_DIV.
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*/
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sysInfo->pllPciDiv = (pllmr0 & PLLMR0_PCI_TO_PLB_MASK) + 1;
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/*
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* Determine EXTBUS_DIV.
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*/
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sysInfo->pllExtBusDiv = ((pllmr0 & PLLMR0_EXB_TO_PLB_MASK) >> 8) + 2;
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/*
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* Determine OPB_DIV.
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*/
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sysInfo->pllOpbDiv = ((pllmr0 & PLLMR0_OPB_TO_PLB_MASK) >> 12) + 1;
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/*
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* Determine the M factor
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*/
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m = sysInfo->pllFbkDiv * sysInfo->pllFwdDivB;
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/*
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* Determine VCO clock frequency
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*/
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sysInfo->freqVCOMhz = (1000000 * m) / sysClkPeriodPs;
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/*
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* Determine CPU clock frequency
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*/
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pllmr0_ccdv = ((pllmr0 & PLLMR0_CPU_DIV_MASK) >> 20) + 1;
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if (pllmr1 & PLLMR1_SSCS_MASK) {
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sysInfo->freqProcessor = (CONFIG_SYS_CLK_FREQ * sysInfo->pllFbkDiv)
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/ pllmr0_ccdv;
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} else {
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sysInfo->freqProcessor = CONFIG_SYS_CLK_FREQ / pllmr0_ccdv;
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}
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/*
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* Determine PLB clock frequency
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*/
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sysInfo->freqPLB = sysInfo->freqProcessor / sysInfo->pllPlbDiv;
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if (!((sysInfo->freqVCOMhz >= VCO_MIN) && (sysInfo->freqVCOMhz <= VCO_MAX))) {
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printf ("\nInvalid VCO frequency calculated : %ld MHz \a\n",
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sysInfo->freqVCOMhz);
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printf ("It must be between %d-%d MHz \a\n", VCO_MIN, VCO_MAX);
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printf ("PLL Mode reg 0 : %8.8lx\a\n", pllmr0);
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printf ("PLL Mode reg 1 : %8.8lx\a\n", pllmr1);
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hang ();
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}
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}
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/********************************************
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* get_OPB_freq
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* return OPB bus freq in Hz
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*********************************************/
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ulong get_OPB_freq (void)
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{
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ulong val = 0;
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PPC405_SYS_INFO sys_info;
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get_sys_info (&sys_info);
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val = sys_info.freqPLB / sys_info.pllOpbDiv;
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return val;
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}
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/********************************************
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* get_PCI_freq
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* return PCI bus freq in Hz
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*********************************************/
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ulong get_PCI_freq (void)
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{
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ulong val;
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PPC405_SYS_INFO sys_info;
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get_sys_info (&sys_info);
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val = sys_info.freqPLB / sys_info.pllPciDiv;
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return val;
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}
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#endif
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int get_clocks (void)
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{
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#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_440) || defined(CONFIG_405) || defined(CONFIG_405EP)
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DECLARE_GLOBAL_DATA_PTR;
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sys_info_t sys_info;
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get_sys_info (&sys_info);
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gd->cpu_clk = sys_info.freqProcessor;
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gd->bus_clk = sys_info.freqPLB;
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#endif /* defined(CONFIG_405GP) || defined(CONFIG_405CR) */
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#ifdef CONFIG_IOP480
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DECLARE_GLOBAL_DATA_PTR;
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gd->cpu_clk = 66000000;
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gd->bus_clk = 66000000;
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#endif
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return (0);
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}
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/********************************************
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* get_bus_freq
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* return PLB bus freq in Hz
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*********************************************/
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ulong get_bus_freq (ulong dummy)
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{
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ulong val;
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#if defined(CONFIG_405GP) || defined(CONFIG_405CR) || defined(CONFIG_405) || defined(CONFIG_440) || defined(CONFIG_405EP)
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sys_info_t sys_info;
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get_sys_info (&sys_info);
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val = sys_info.freqPLB;
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#elif defined(CONFIG_IOP480)
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val = 66;
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#else
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# error get_bus_freq() not implemented
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#endif
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return val;
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}
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