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34c3c0e01d
* Added comments and a printf to warn that PCI-X won't work at 33MHz Patch by Andy Fleming 17-Mar-2006 Signed-off-by: Andy Fleming <afleming@freescale.com>
237 lines
6.2 KiB
C
237 lines
6.2 KiB
C
/*
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* Copyright 2004 Freescale Semiconductor.
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* Copyright (C) 2003 Motorola Inc.
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* Xianghua Xiao (x.xiao@motorola.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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/*
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* PCI Configuration space access support for MPC85xx PCI Bridge
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*/
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#include <common.h>
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#include <asm/cpm_85xx.h>
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#include <pci.h>
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#if defined(CONFIG_PCI)
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static struct pci_controller *pci_hose;
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void
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pci_mpc85xx_init(struct pci_controller *board_hose)
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{
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u16 reg16;
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u32 dev;
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volatile immap_t *immap = (immap_t *)CFG_CCSRBAR;
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volatile ccsr_pcix_t *pcix = &immap->im_pcix;
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volatile ccsr_pcix_t *pcix2 = &immap->im_pcix2;
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volatile ccsr_gur_t *gur = &immap->im_gur;
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struct pci_controller * hose;
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pci_hose = board_hose;
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hose = &pci_hose[0];
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hose->first_busno = 0;
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hose->last_busno = 0xff;
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pci_setup_indirect(hose,
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(CFG_IMMR+0x8000),
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(CFG_IMMR+0x8004));
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/*
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* Hose scan.
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*/
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dev = PCI_BDF(hose->first_busno, 0, 0);
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pci_hose_read_config_word (hose, dev, PCI_COMMAND, ®16);
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reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
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pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
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/*
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* Clear non-reserved bits in status register.
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*/
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pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
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if (!(gur->pordevsr & PORDEVSR_PCI)) {
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/* PCI-X init */
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if (CONFIG_SYS_CLK_FREQ < 66000000)
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printf("PCI-X will only work at 66 MHz\n");
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reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
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| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
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pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
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}
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pcix->potar1 = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
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pcix->potear1 = 0x00000000;
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pcix->powbar1 = (CFG_PCI1_MEM_PHYS >> 12) & 0x000fffff;
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pcix->powbear1 = 0x00000000;
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pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
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POWAR_MEM_WRITE | POWAR_MEM_512M);
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pcix->potar2 = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
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pcix->potear2 = 0x00000000;
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pcix->powbar2 = (CFG_PCI1_IO_PHYS >> 12) & 0x000fffff;
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pcix->powbear2 = 0x00000000;
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pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
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POWAR_IO_WRITE | POWAR_IO_1M);
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pcix->pitar1 = 0x00000000;
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pcix->piwbar1 = 0x00000000;
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pcix->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
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PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
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pcix->powar3 = 0;
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pcix->powar4 = 0;
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pcix->piwar2 = 0;
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pcix->piwar3 = 0;
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pci_set_region(hose->regions + 0,
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CFG_PCI1_MEM_BASE,
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CFG_PCI1_MEM_PHYS,
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CFG_PCI1_MEM_SIZE,
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PCI_REGION_MEM);
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pci_set_region(hose->regions + 1,
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CFG_PCI1_IO_BASE,
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CFG_PCI1_IO_PHYS,
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CFG_PCI1_IO_SIZE,
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PCI_REGION_IO);
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hose->region_count = 2;
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pci_register_hose(hose);
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#if defined(CONFIG_MPC8555CDS) || defined(CONFIG_MPC8541CDS)
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/*
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* This is a SW workaround for an apparent HW problem
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* in the PCI controller on the MPC85555/41 CDS boards.
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* The first config cycle must be to a valid, known
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* device on the PCI bus in order to trick the PCI
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* controller state machine into a known valid state.
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* Without this, the first config cycle has the chance
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* of hanging the controller permanently, just leaving
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* it in a semi-working state, or leaving it working.
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*
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* Pick on the Tundra, Device 17, to get it right.
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*/
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{
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u8 header_type;
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pci_hose_read_config_byte(hose,
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PCI_BDF(0,17,0),
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PCI_HEADER_TYPE,
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&header_type);
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}
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#endif
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hose->last_busno = pci_hose_scan(hose);
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#ifdef CONFIG_MPC85XX_PCI2
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hose = &pci_hose[1];
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hose->first_busno = pci_hose[0].last_busno + 1;
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hose->last_busno = 0xff;
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pci_setup_indirect(hose,
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(CFG_IMMR+0x9000),
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(CFG_IMMR+0x9004));
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dev = PCI_BDF(hose->first_busno, 0, 0);
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pci_hose_read_config_word (hose, dev, PCI_COMMAND, ®16);
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reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
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pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
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/*
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* Clear non-reserved bits in status register.
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*/
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pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
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pcix2->potar1 = (CFG_PCI2_MEM_BASE >> 12) & 0x000fffff;
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pcix2->potear1 = 0x00000000;
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pcix2->powbar1 = (CFG_PCI2_MEM_PHYS >> 12) & 0x000fffff;
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pcix2->powbear1 = 0x00000000;
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pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
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POWAR_MEM_WRITE | POWAR_MEM_512M);
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pcix2->potar2 = (CFG_PCI2_IO_BASE >> 12) & 0x000fffff;
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pcix2->potear2 = 0x00000000;
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pcix2->powbar2 = (CFG_PCI2_IO_PHYS >> 12) & 0x000fffff;
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pcix2->powbear2 = 0x00000000;
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pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
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POWAR_IO_WRITE | POWAR_IO_1M);
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pcix2->pitar1 = 0x00000000;
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pcix2->piwbar1 = 0x00000000;
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pcix2->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
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PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
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pcix2->powar3 = 0;
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pcix2->powar4 = 0;
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pcix2->piwar2 = 0;
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pcix2->piwar3 = 0;
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pci_set_region(hose->regions + 0,
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CFG_PCI2_MEM_BASE,
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CFG_PCI2_MEM_PHYS,
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CFG_PCI2_MEM_SIZE,
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PCI_REGION_MEM);
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pci_set_region(hose->regions + 1,
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CFG_PCI2_IO_BASE,
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CFG_PCI2_IO_PHYS,
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CFG_PCI2_IO_SIZE,
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PCI_REGION_IO);
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hose->region_count = 2;
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/*
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* Hose scan.
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*/
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pci_register_hose(hose);
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hose->last_busno = pci_hose_scan(hose);
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#endif
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}
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#ifdef CONFIG_OF_FLAT_TREE
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void
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ft_pci_setup(void *blob, bd_t *bd)
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{
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u32 *p;
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int len;
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p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8000/bus-range", &len);
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if (p != NULL) {
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p[0] = pci_hose[0].first_busno;
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p[1] = pci_hose[0].last_busno;
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}
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#ifdef CONFIG_MPC85XX_PCI2
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p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@9000/bus-range", &len);
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if (p != NULL) {
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p[0] = pci_hose[1].first_busno;
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p[1] = pci_hose[1].last_busno;
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}
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#endif
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}
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#endif /* CONFIG_OF_FLAT_TREE */
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#endif /* CONFIG_PCI */
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