/* * Copyright (C) Freescale Semiconductor, Inc. 2006, 2007. All rights reserved. * * 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 */ #include <common.h> #include <asm/mmu.h> #include <asm/global_data.h> #include <pci.h> #if defined(CONFIG_OF_LIBFDT) #include <libfdt.h> #include <fdt_support.h> #endif DECLARE_GLOBAL_DATA_PTR; /* System RAM mapped to PCI space */ #define CONFIG_PCI_SYS_MEM_BUS CONFIG_SYS_SDRAM_BASE #define CONFIG_PCI_SYS_MEM_PHYS CONFIG_SYS_SDRAM_BASE static struct pci_controller pci_hose; /************************************************************************** * pci_init_board() * */ void pci_init_board(void) { volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; volatile law512x_t *pci_law; volatile pot512x_t *pci_pot; volatile pcictrl512x_t *pci_ctrl; volatile pciconf512x_t *pci_conf; u16 reg16; u32 reg32; u32 dev; struct pci_controller *hose; /* Set PCI divider for 33MHz */ reg32 = immr->clk.scfr[0]; reg32 &= ~(SCFR1_PCI_DIV_MASK); reg32 |= SCFR1_PCI_DIV << SCFR1_PCI_DIV_SHIFT; immr->clk.scfr[0] = reg32; pci_law = immr->sysconf.pcilaw; pci_pot = immr->ios.pot; pci_ctrl = &immr->pci_ctrl; pci_conf = &immr->pci_conf; hose = &pci_hose; /* * Release PCI RST Output signal */ pci_ctrl->gcr = 0; udelay(2000); pci_ctrl->gcr = 1; /* We need to wait at least a 1sec based on PCI specs */ { int i; for (i = 0; i < 1000; i++) udelay(1000); } /* * Configure PCI Local Access Windows */ pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR; pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M; pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR; pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_16M; /* * Configure PCI Outbound Translation Windows */ /* PCI mem space - prefetch */ pci_pot[0].potar = (CONFIG_SYS_PCI_MEM_BASE >> 12) & POTAR_TA_MASK; pci_pot[0].pobar = (CONFIG_SYS_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK; pci_pot[0].pocmr = POCMR_EN | POCMR_PRE | POCMR_CM_256M; /* PCI IO space */ pci_pot[1].potar = (CONFIG_SYS_PCI_IO_BASE >> 12) & POTAR_TA_MASK; pci_pot[1].pobar = (CONFIG_SYS_PCI_IO_PHYS >> 12) & POBAR_BA_MASK; pci_pot[1].pocmr = POCMR_EN | POCMR_IO | POCMR_CM_16M; /* PCI mmio - non-prefetch mem space */ pci_pot[2].potar = (CONFIG_SYS_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK; pci_pot[2].pobar = (CONFIG_SYS_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK; pci_pot[2].pocmr = POCMR_EN | POCMR_CM_256M; /* * Configure PCI Inbound Translation Windows */ /* we need RAM mapped to PCI space for the devices to * access main memory */ pci_ctrl[0].pitar1 = 0x0; pci_ctrl[0].pibar1 = 0x0; pci_ctrl[0].piebar1 = 0x0; pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1); hose->first_busno = 0; hose->last_busno = 0xff; /* PCI memory prefetch space */ pci_set_region(hose->regions + 0, CONFIG_SYS_PCI_MEM_BASE, CONFIG_SYS_PCI_MEM_PHYS, CONFIG_SYS_PCI_MEM_SIZE, PCI_REGION_MEM|PCI_REGION_PREFETCH); /* PCI memory space */ pci_set_region(hose->regions + 1, CONFIG_SYS_PCI_MMIO_BASE, CONFIG_SYS_PCI_MMIO_PHYS, CONFIG_SYS_PCI_MMIO_SIZE, PCI_REGION_MEM); /* PCI IO space */ pci_set_region(hose->regions + 2, CONFIG_SYS_PCI_IO_BASE, CONFIG_SYS_PCI_IO_PHYS, CONFIG_SYS_PCI_IO_SIZE, PCI_REGION_IO); /* System memory space */ pci_set_region(hose->regions + 3, CONFIG_PCI_SYS_MEM_BUS, CONFIG_PCI_SYS_MEM_PHYS, gd->ram_size, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY); hose->region_count = 4; pci_setup_indirect(hose, (CONFIG_SYS_IMMR + 0x8300), (CONFIG_SYS_IMMR + 0x8304)); pci_register_hose(hose); /* * Write to Command register */ reg16 = 0xff; 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); pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80); pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08); #ifdef CONFIG_PCI_SCAN_SHOW printf("PCI: Bus Dev VenId DevId Class Int\n"); #endif /* * Hose scan. */ hose->last_busno = pci_hose_scan(hose); } #if defined(CONFIG_OF_LIBFDT) void ft_pci_setup(void *blob, bd_t *bd) { int nodeoffset; int tmp[2]; const char *path; nodeoffset = fdt_path_offset(blob, "/aliases"); if (nodeoffset >= 0) { path = fdt_getprop(blob, nodeoffset, "pci", NULL); if (path) { tmp[0] = cpu_to_be32(pci_hose.first_busno); tmp[1] = cpu_to_be32(pci_hose.last_busno); do_fixup_by_path(blob, path, "bus-range", &tmp, sizeof(tmp), 1); tmp[0] = cpu_to_be32(gd->pci_clk); do_fixup_by_path(blob, path, "clock-frequency", &tmp, sizeof(tmp[0]), 1); } } } #endif /* CONFIG_OF_LIBFDT */