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/*
* Copyright 2004 Freescale Semiconductor.
* Copyright (C) 2003 Motorola Inc.
* Xianghua Xiao (x.xiao@motorola.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* PCI Configuration space access support for MPC85xx PCI Bridge
*/
#include <common.h>
#include <asm/cpm_85xx.h>
#include <pci.h>
#if defined(CONFIG_PCI)
static struct pci_controller *pci_hose;
void
pci_mpc85xx_init(struct pci_controller *board_hose)
{
u16 reg16;
u32 dev;
volatile ccsr_pcix_t *pcix = (void *)(CFG_MPC85xx_PCIX_ADDR);
#ifdef CONFIG_MPC85XX_PCI2
volatile ccsr_pcix_t *pcix2 = (void *)(CFG_MPC85xx_PCIX2_ADDR);
#endif
volatile ccsr_gur_t *gur = (void *)(CFG_MPC85xx_GUTS_ADDR);
struct pci_controller * hose;
pci_hose = board_hose;
hose = &pci_hose[0];
hose->first_busno = 0;
hose->last_busno = 0xff;
pci_setup_indirect(hose,
(CFG_IMMR+0x8000),
(CFG_IMMR+0x8004));
/*
* Hose scan.
*/
dev = PCI_BDF(hose->first_busno, 0, 0);
pci_hose_read_config_word (hose, dev, PCI_COMMAND, ®16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
if (!(gur->pordevsr & PORDEVSR_PCI)) {
/* PCI-X init */
if (CONFIG_SYS_CLK_FREQ < 66000000)
printf("PCI-X will only work at 66 MHz\n");
reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
}
pcix->potar1 = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
pcix->potear1 = 0x00000000;
pcix->powbar1 = (CFG_PCI1_MEM_PHYS >> 12) & 0x000fffff;
pcix->powbear1 = 0x00000000;
pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
POWAR_MEM_WRITE | (__ilog2(CFG_PCI1_MEM_SIZE) - 1));
pcix->potar2 = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
pcix->potear2 = 0x00000000;
pcix->powbar2 = (CFG_PCI1_IO_PHYS >> 12) & 0x000fffff;
pcix->powbear2 = 0x00000000;
pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
POWAR_IO_WRITE | (__ilog2(CFG_PCI1_IO_SIZE) - 1));
pcix->pitar1 = 0x00000000;
pcix->piwbar1 = 0x00000000;
pcix->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
pcix->powar3 = 0;
pcix->powar4 = 0;
pcix->piwar2 = 0;
pcix->piwar3 = 0;
pci_set_region(hose->regions + 0,
CFG_PCI1_MEM_BASE,
CFG_PCI1_MEM_PHYS,
CFG_PCI1_MEM_SIZE,
PCI_REGION_MEM);
pci_set_region(hose->regions + 1,
CFG_PCI1_IO_BASE,
CFG_PCI1_IO_PHYS,
CFG_PCI1_IO_SIZE,
PCI_REGION_IO);
hose->region_count = 2;
pci_register_hose(hose);
#if defined(CONFIG_MPC8555CDS) || defined(CONFIG_MPC8541CDS)
/*
* This is a SW workaround for an apparent HW problem
* in the PCI controller on the MPC85555/41 CDS boards.
* The first config cycle must be to a valid, known
* device on the PCI bus in order to trick the PCI
* controller state machine into a known valid state.
* Without this, the first config cycle has the chance
* of hanging the controller permanently, just leaving
* it in a semi-working state, or leaving it working.
*
* Pick on the Tundra, Device 17, to get it right.
*/
{
u8 header_type;
pci_hose_read_config_byte(hose,
PCI_BDF(0,BRIDGE_ID,0),
PCI_HEADER_TYPE,
&header_type);
}
#endif
hose->last_busno = pci_hose_scan(hose);
#ifdef CONFIG_MPC85XX_PCI2
hose = &pci_hose[1];
hose->first_busno = pci_hose[0].last_busno + 1;
hose->last_busno = 0xff;
pci_setup_indirect(hose,
(CFG_IMMR+0x9000),
(CFG_IMMR+0x9004));
dev = PCI_BDF(hose->first_busno, 0, 0);
pci_hose_read_config_word (hose, dev, PCI_COMMAND, ®16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
pcix2->potar1 = (CFG_PCI2_MEM_BASE >> 12) & 0x000fffff;
pcix2->potear1 = 0x00000000;
pcix2->powbar1 = (CFG_PCI2_MEM_PHYS >> 12) & 0x000fffff;
pcix2->powbear1 = 0x00000000;
pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
POWAR_MEM_WRITE | (__ilog2(CFG_PCI2_MEM_SIZE) - 1));
pcix2->potar2 = (CFG_PCI2_IO_BASE >> 12) & 0x000fffff;
pcix2->potear2 = 0x00000000;
pcix2->powbar2 = (CFG_PCI2_IO_PHYS >> 12) & 0x000fffff;
pcix2->powbear2 = 0x00000000;
pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
POWAR_IO_WRITE | (__ilog2(CFG_PCI2_IO_SIZE) - 1));
pcix2->pitar1 = 0x00000000;
pcix2->piwbar1 = 0x00000000;
pcix2->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
pcix2->powar3 = 0;
pcix2->powar4 = 0;
pcix2->piwar2 = 0;
pcix2->piwar3 = 0;
pci_set_region(hose->regions + 0,
CFG_PCI2_MEM_BASE,
CFG_PCI2_MEM_PHYS,
CFG_PCI2_MEM_SIZE,
PCI_REGION_MEM);
pci_set_region(hose->regions + 1,
CFG_PCI2_IO_BASE,
CFG_PCI2_IO_PHYS,
CFG_PCI2_IO_SIZE,
PCI_REGION_IO);
hose->region_count = 2;
/*
* Hose scan.
*/
pci_register_hose(hose);
hose->last_busno = pci_hose_scan(hose);
#endif
}
#endif /* CONFIG_PCI */
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