336 lines
10 KiB
C
336 lines
10 KiB
C
/*
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* (C) Copyright 2005
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* John Otken, jotken@softadvances.com
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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 <command.h>
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#include <ppc4xx.h>
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#include <asm/processor.h>
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#include <asm/ppc4xx-isram.h>
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#include <spd_sdram.h>
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#include "epld.h"
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DECLARE_GLOBAL_DATA_PTR;
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extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
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/*************************************************************************
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* int board_early_init_f()
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*
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************************************************************************/
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int board_early_init_f(void)
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{
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u32 mfr;
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mtebc( PB0AP, 0x03800000 ); /* set chip selects */
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mtebc( PB0CR, 0xffc58000 ); /* ebc0_b0cr, 4MB at 0xffc00000 CS0 */
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mtebc( PB1AP, 0x03800000 );
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mtebc( PB1CR, 0xff018000 ); /* ebc0_b1cr, 1MB at 0xff000000 CS1 */
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mtebc( PB2AP, 0x03800000 );
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mtebc( PB2CR, 0xff838000 ); /* ebc0_b2cr, 2MB at 0xff800000 CS2 */
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mtdcr( uic1sr, 0xffffffff ); /* Clear all interrupts */
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mtdcr( uic1er, 0x00000000 ); /* disable all interrupts */
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mtdcr( uic1cr, 0x00000000 ); /* Set Critical / Non Critical interrupts */
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mtdcr( uic1pr, 0x7fff83ff ); /* Set Interrupt Polarities */
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mtdcr( uic1tr, 0x001f8000 ); /* Set Interrupt Trigger Levels */
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mtdcr( uic1vr, 0x00000001 ); /* Set Vect base=0,INT31 Highest priority */
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mtdcr( uic1sr, 0x00000000 ); /* clear all interrupts */
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mtdcr( uic1sr, 0xffffffff );
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mtdcr( uic0sr, 0xffffffff ); /* Clear all interrupts */
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mtdcr( uic0er, 0x00000000 ); /* disable all interrupts excepted cascade */
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mtdcr( uic0cr, 0x00000001 ); /* Set Critical / Non Critical interrupts */
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mtdcr( uic0pr, 0xffffffff ); /* Set Interrupt Polarities */
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mtdcr( uic0tr, 0x01000004 ); /* Set Interrupt Trigger Levels */
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mtdcr( uic0vr, 0x00000001 ); /* Set Vect base=0,INT31 Highest priority */
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mtdcr( uic0sr, 0x00000000 ); /* clear all interrupts */
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mtdcr( uic0sr, 0xffffffff );
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mfsdr(SDR0_MFR, mfr);
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mfr |= SDR0_MFR_FIXD; /* Workaround for PCI/DMA */
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mtsdr(SDR0_MFR, mfr);
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return 0;
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}
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/*************************************************************************
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* int misc_init_r()
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*
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************************************************************************/
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int misc_init_r(void)
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{
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volatile epld_t *x = (epld_t *) CONFIG_SYS_EPLD_BASE;
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/* set modes of operation */
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x->ethuart |= EPLD2_ETH_MODE_10 | EPLD2_ETH_MODE_100 |
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EPLD2_ETH_MODE_1000 | EPLD2_ETH_DUPLEX_MODE;
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/* clear ETHERNET_AUTO_NEGO bit to turn on autonegotiation */
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x->ethuart &= ~EPLD2_ETH_AUTO_NEGO;
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/* put Ethernet+PHY in reset */
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x->ethuart &= ~EPLD2_RESET_ETH_N;
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udelay(10000);
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/* take Ethernet+PHY out of reset */
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x->ethuart |= EPLD2_RESET_ETH_N;
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return 0;
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}
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/*************************************************************************
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* int checkboard()
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*
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************************************************************************/
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int checkboard(void)
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{
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char *s = getenv("serial#");
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printf("Board: Luan - AMCC PPC440SP Evaluation Board");
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if (s != NULL) {
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puts(", serial# ");
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puts(s);
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}
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putc('\n');
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return 0;
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}
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/*
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* Override the default functions in cpu/ppc4xx/44x_spd_ddr2.c with
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* board specific values.
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*/
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u32 ddr_clktr(u32 default_val) {
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return (SDRAM_CLKTR_CLKP_180_DEG_ADV);
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}
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/*************************************************************************
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* pci_pre_init
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*
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* This routine is called just prior to registering the hose and gives
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* the board the opportunity to check things. Returning a value of zero
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* indicates that things are bad & PCI initialization should be aborted.
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*
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* Different boards may wish to customize the pci controller structure
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* (add regions, override default access routines, etc) or perform
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* certain pre-initialization actions.
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*
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************************************************************************/
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#if defined(CONFIG_PCI)
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int pci_pre_init( struct pci_controller *hose )
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{
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unsigned long strap;
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/*--------------------------------------------------------------------------+
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* The luan board is always configured as the host & requires the
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* PCI arbiter to be enabled.
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*--------------------------------------------------------------------------*/
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mfsdr(SDR0_SDSTP1, strap);
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if( (strap & SDR0_SDSTP1_PAE_MASK) == 0 ) {
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printf("PCI: SDR0_STRP1[%08lX] - PCI Arbiter disabled.\n",strap);
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return 0;
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}
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return 1;
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}
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#endif /* defined(CONFIG_PCI) */
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/*************************************************************************
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* pci_target_init
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*
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* The bootstrap configuration provides default settings for the pci
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* inbound map (PIM). But the bootstrap config choices are limited and
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* may not be sufficient for a given board.
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*
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************************************************************************/
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#if defined(CONFIG_PCI) && defined(CONFIG_SYS_PCI_TARGET_INIT)
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void pci_target_init(struct pci_controller *hose)
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{
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/*--------------------------------------------------------------------------+
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* Disable everything
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*--------------------------------------------------------------------------*/
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out32r( PCIX0_PIM0SA, 0 ); /* disable */
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out32r( PCIX0_PIM1SA, 0 ); /* disable */
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out32r( PCIX0_PIM2SA, 0 ); /* disable */
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out32r( PCIX0_EROMBA, 0 ); /* disable expansion rom */
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/*--------------------------------------------------------------------------+
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* Map all of SDRAM to PCI address 0x0000_0000. Note that the 440 strapping
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* options to not support sizes such as 128/256 MB.
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*--------------------------------------------------------------------------*/
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out32r( PCIX0_PIM0LAL, CONFIG_SYS_SDRAM_BASE );
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out32r( PCIX0_PIM0LAH, 0 );
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out32r( PCIX0_PIM0SA, ~(gd->ram_size - 1) | 1 );
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out32r( PCIX0_BAR0, 0 );
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/*--------------------------------------------------------------------------+
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* Program the board's subsystem id/vendor id
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*--------------------------------------------------------------------------*/
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out16r( PCIX0_SBSYSVID, CONFIG_SYS_PCI_SUBSYS_VENDORID );
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out16r( PCIX0_SBSYSID, CONFIG_SYS_PCI_SUBSYS_DEVICEID );
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out16r( PCIX0_CMD, in16r(PCIX0_CMD) | PCI_COMMAND_MEMORY );
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}
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#endif /* defined(CONFIG_PCI) && defined(CONFIG_SYS_PCI_TARGET_INIT) */
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/*************************************************************************
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* is_pci_host
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*
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* This routine is called to determine if a pci scan should be
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* performed. With various hardware environments (especially cPCI and
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* PPMC) it's insufficient to depend on the state of the arbiter enable
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* bit in the strap register, or generic host/adapter assumptions.
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*
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* Rather than hard-code a bad assumption in the general 440 code, the
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* 440 pci code requires the board to decide at runtime.
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*
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* Return 0 for adapter mode, non-zero for host (monarch) mode.
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*
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*
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************************************************************************/
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#if defined(CONFIG_PCI)
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int is_pci_host(struct pci_controller *hose)
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{
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return 1;
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}
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#endif /* defined(CONFIG_PCI) */
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/*************************************************************************
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* hw_watchdog_reset
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*
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* This routine is called to reset (keep alive) the watchdog timer
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*
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************************************************************************/
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#if defined(CONFIG_HW_WATCHDOG)
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void hw_watchdog_reset(void)
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{
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}
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#endif
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/*************************************************************************
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* int on_off()
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*
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************************************************************************/
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static int on_off( const char *s )
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{
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if (strcmp(s, "on") == 0) {
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return 1;
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} else if (strcmp(s, "off") == 0) {
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return 0;
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}
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return -1;
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}
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/*************************************************************************
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* void l2cache_disable()
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*
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************************************************************************/
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static void l2cache_disable(void)
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{
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mtdcr( L2_CACHE_CFG, 0 );
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}
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/*************************************************************************
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* void l2cache_enable()
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*
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************************************************************************/
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static void l2cache_enable(void) /* see p258 7.4.1 Enabling L2 Cache */
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{
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mtdcr( L2_CACHE_CFG, 0x80000000 ); /* enable L2_MODE L2_CFG[L2M] */
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mtdcr( L2_CACHE_ADDR, 0 ); /* set L2_ADDR with all zeros */
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mtdcr( L2_CACHE_CMD, 0x80000000 ); /* issue HCLEAR command via L2_CMD */
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while (!(mfdcr( L2_CACHE_STAT ) & 0x80000000 )) ;; /* poll L2_SR for completion */
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mtdcr( L2_CACHE_CMD, 0x10000000 ); /* clear cache errors L2_CMD[CCP] */
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mtdcr( L2_CACHE_CMD, 0x08000000 ); /* clear tag errors L2_CMD[CTE] */
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mtdcr( L2_CACHE_SNP0, 0 ); /* snoop registers */
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mtdcr( L2_CACHE_SNP1, 0 );
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__asm__ volatile ("sync"); /* msync */
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mtdcr( L2_CACHE_CFG, 0xe0000000 ); /* inst and data use L2 */
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__asm__ volatile ("sync");
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}
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/*************************************************************************
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* int l2cache_status()
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*
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************************************************************************/
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static int l2cache_status(void)
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{
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return (mfdcr( L2_CACHE_CFG ) & 0x60000000) != 0;
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}
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/*************************************************************************
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* int do_l2cache()
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*
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************************************************************************/
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int do_l2cache( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
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{
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switch (argc) {
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case 2: /* on / off */
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switch (on_off(argv[1])) {
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case 0: l2cache_disable();
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break;
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case 1: l2cache_enable();
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break;
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}
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/* FALL TROUGH */
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case 1: /* get status */
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printf ("L2 Cache is %s\n",
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l2cache_status() ? "ON" : "OFF");
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return 0;
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default:
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cmd_usage(cmdtp);
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return 1;
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}
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return 0;
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}
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U_BOOT_CMD(
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l2cache, 2, 1, do_l2cache,
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"enable or disable L2 cache",
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"[on, off]\n"
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" - enable or disable L2 cache"
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);
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