diff options
Diffstat (limited to 'cpu/mpc86xx/pci.c')
| -rw-r--r-- | cpu/mpc86xx/pci.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/cpu/mpc86xx/pci.c b/cpu/mpc86xx/pci.c new file mode 100644 index 0000000000..b86548db4f --- /dev/null +++ b/cpu/mpc86xx/pci.c @@ -0,0 +1,146 @@ +/* + * Copyright (C) Freescale Semiconductor,Inc. + * 2005, 2006. All rights reserved. + * + * Ed Swarthout (ed.swarthout@freescale.com) + * Jason Jin (Jason.jin@freescale.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 + */ + +/* + * PCIE Configuration space access support for PCIE Bridge + */ +#include <common.h> +#include <pci.h> + +#if defined(CONFIG_PCI) +void +pci_mpc86xx_init(struct pci_controller *hose) +{ + volatile immap_t *immap = (immap_t *) CFG_CCSRBAR; + volatile ccsr_pex_t *pcie1 = &immap->im_pex1; + u16 temp16; + u32 temp32; + + volatile ccsr_gur_t *gur = &immap->im_gur; + uint host1_agent = (gur->porbmsr & MPC86xx_PORBMSR_HA) >> 17; + uint pcie1_host = (host1_agent == 2) || (host1_agent == 3); + uint pcie1_agent = (host1_agent == 0) || (host1_agent == 1); + uint devdisr = gur->devdisr; + uint io_sel = (gur->pordevsr & MPC86xx_PORDEVSR_IO_SEL) >> 16; + + if ((io_sel == 2 || io_sel == 3 || io_sel == 5 || io_sel == 6 || + io_sel == 7 || io_sel == 0xf) + && !(devdisr & MPC86xx_DEVDISR_PCIEX1)) { + printf("PCI-EXPRESS 1: Configured as %s \n", + pcie1_agent ? "Agent" : "Host"); + if (pcie1_agent) + return; /*Don't scan bus when configured as agent */ + printf(" Scanning PCIE bus"); + debug("0x%08x=0x%08x ", + &pcie1->pme_msg_det, + pcie1->pme_msg_det); + if (pcie1->pme_msg_det) { + pcie1->pme_msg_det = 0xffffffff; + debug(" with errors. Clearing. Now 0x%08x", + pcie1->pme_msg_det); + } + debug("\n"); + } else { + printf("PCI-EXPRESS 1 disabled!\n"); + return; + } + + /* + * Set first_bus=0 only skipped B0:D0:F0 which is + * a reserved device in M1575, but make it easy for + * most of the scan process. + */ + hose->first_busno = 0x00; + hose->last_busno = 0xfe; + + pcie_setup_indirect(hose, (CFG_IMMR + 0x8000), (CFG_IMMR + 0x8004)); + + pci_hose_read_config_word(hose, + PCI_BDF(0, 0, 0), PCI_COMMAND, &temp16); + temp16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | PCI_COMMAND_IO; + pci_hose_write_config_word(hose, + PCI_BDF(0, 0, 0), PCI_COMMAND, temp16); + + pci_hose_write_config_word(hose, PCI_BDF(0, 0, 0), PCI_STATUS, 0xffff); + pci_hose_write_config_byte(hose, + PCI_BDF(0, 0, 0), PCI_LATENCY_TIMER, 0x80); + + pci_hose_read_config_dword(hose, PCI_BDF(0, 0, 0), PCI_PRIMARY_BUS, + &temp32); + temp32 = (temp32 & 0xff000000) | (0xff) | (0x0 << 8) | (0xfe << 16); + pci_hose_write_config_dword(hose, PCI_BDF(0, 0, 0), PCI_PRIMARY_BUS, + temp32); + + pcie1->powar1 = 0; + pcie1->powar2 = 0; + pcie1->piwar1 = 0; + pcie1->piwar1 = 0; + + pcie1->powbar1 = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff; + pcie1->powar1 = 0x8004401c; /* 512M MEM space */ + pcie1->potar1 = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff; + pcie1->potear1 = 0x00000000; + + pcie1->powbar2 = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff; + pcie1->powar2 = 0x80088017; /* 16M IO space */ + pcie1->potar2 = 0x00000000; + pcie1->potear2 = 0x00000000; + + pcie1->pitar1 = 0x00000000; + pcie1->piwbar1 = 0x00000000; + /* Enable, Prefetch, Local Mem, * Snoop R/W, 2G */ + pcie1->piwar1 = 0xa0f5501e; + + pci_set_region(hose->regions + 0, + CFG_PCI_MEMORY_BUS, + CFG_PCI_MEMORY_PHYS, + CFG_PCI_MEMORY_SIZE, + PCI_REGION_MEM | PCI_REGION_MEMORY); + + pci_set_region(hose->regions + 1, + CFG_PCI1_MEM_BASE, + CFG_PCI1_MEM_PHYS, + CFG_PCI1_MEM_SIZE, + PCI_REGION_MEM); + + pci_set_region(hose->regions + 2, + CFG_PCI1_IO_BASE, + CFG_PCI1_IO_PHYS, + CFG_PCI1_IO_SIZE, + PCI_REGION_IO); + + hose->region_count = 3; + + pci_register_hose(hose); + + hose->last_busno = pci_hose_scan(hose); + debug("pcie_mpc86xx_init: last_busno %x\n", hose->last_busno); + debug("pcie_mpc86xx init: current_busno %x\n ", hose->current_busno); + + printf("....PCIE1 scan & enumeration done\n"); +} +#endif /* CONFIG_PCI */ |