/* * Copyright 2007 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * Version 2 as published by the Free Software Foundation. * * 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> DECLARE_GLOBAL_DATA_PTR; /* * PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's * * Initialize controller and call the common driver/pci pci_hose_scan to * scan for bridges and devices. * * Hose fields which need to be pre-initialized by board specific code: * regions[] * first_busno * * Fields updated: * last_busno */ #include <pci.h> #include <asm/immap_fsl_pci.h> /* Freescale-specific PCI config registers */ #define FSL_PCI_PBFR 0x44 #define FSL_PCIE_CAP_ID 0x4c #define FSL_PCIE_CFG_RDY 0x4b0 void pciauto_prescan_setup_bridge(struct pci_controller *hose, pci_dev_t dev, int sub_bus); void pciauto_postscan_setup_bridge(struct pci_controller *hose, pci_dev_t dev, int sub_bus); void pciauto_config_init(struct pci_controller *hose); #ifndef CONFIG_SYS_PCI_MEMORY_BUS #define CONFIG_SYS_PCI_MEMORY_BUS 0 #endif #ifndef CONFIG_SYS_PCI_MEMORY_PHYS #define CONFIG_SYS_PCI_MEMORY_PHYS 0 #endif #if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS) #define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024) #endif int fsl_pci_setup_inbound_windows(struct pci_region *r) { struct pci_region *rgn_base = r; u64 sz = min((u64)gd->ram_size, (1ull << 32) - 1); phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS; pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS; pci_size_t pci_sz = 1ull << __ilog2_u64(sz); debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n", (u64)bus_start, (u64)phys_start, (u64)pci_sz); pci_set_region(r++, bus_start, phys_start, pci_sz, PCI_REGION_MEM | PCI_REGION_MEMORY | PCI_REGION_PREFETCH); sz -= pci_sz; bus_start += pci_sz; phys_start += pci_sz; pci_sz = 1ull << __ilog2_u64(sz); if (sz) { debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n", (u64)bus_start, (u64)phys_start, (u64)pci_sz); pci_set_region(r++, bus_start, phys_start, pci_sz, PCI_REGION_MEM | PCI_REGION_MEMORY | PCI_REGION_PREFETCH); sz -= pci_sz; bus_start += pci_sz; phys_start += pci_sz; } #if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT) /* * On 64-bit capable systems, set up a mapping for all of DRAM * in high pci address space. */ pci_sz = 1ull << __ilog2_u64(gd->ram_size); /* round up to the next largest power of two */ if (gd->ram_size > pci_sz) pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1); debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n", (u64)CONFIG_SYS_PCI64_MEMORY_BUS, (u64)CONFIG_SYS_PCI_MEMORY_PHYS, (u64)pci_sz); pci_set_region(r++, CONFIG_SYS_PCI64_MEMORY_BUS, CONFIG_SYS_PCI_MEMORY_PHYS, pci_sz, PCI_REGION_MEM | PCI_REGION_MEMORY | PCI_REGION_PREFETCH); #else pci_sz = 1ull << __ilog2_u64(sz); if (sz) { debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n", (u64)bus_start, (u64)phys_start, (u64)pci_sz); pci_set_region(r++, bus_start, phys_start, pci_sz, PCI_REGION_MEM | PCI_REGION_MEMORY | PCI_REGION_PREFETCH); sz -= pci_sz; bus_start += pci_sz; phys_start += pci_sz; } #endif #ifdef CONFIG_PHYS_64BIT if (sz && (((u64)gd->ram_size) < (1ull << 32))) printf("Was not able to map all of memory via " "inbound windows -- %lld remaining\n", sz); #endif return r - rgn_base; } void fsl_pci_init(struct pci_controller *hose) { u16 temp16; u32 temp32; int busno = hose->first_busno; int enabled; u16 ltssm; u8 temp8; int r; int bridge; int inbound = 0; volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) hose->cfg_addr; pci_dev_t dev = PCI_BDF(busno,0,0); /* Initialize ATMU registers based on hose regions and flags */ volatile pot_t *po = &pci->pot[1]; /* skip 0 */ volatile pit_t *pi = &pci->pit[0]; /* ranges from: 3 to 1 */ #ifdef DEBUG int neg_link_w; #endif for (r=0; r<hose->region_count; r++) { u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1); if (hose->regions[r].flags & PCI_REGION_MEMORY) { /* inbound */ u32 flag = PIWAR_EN | PIWAR_LOCAL | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; pi->pitar = (hose->regions[r].phys_start >> 12); pi->piwbar = (hose->regions[r].bus_start >> 12); #ifdef CONFIG_SYS_PCI_64BIT pi->piwbear = (hose->regions[r].bus_start >> 44); #else pi->piwbear = 0; #endif if (hose->regions[r].flags & PCI_REGION_PREFETCH) flag |= PIWAR_PF; pi->piwar = flag | sz; pi++; inbound = hose->regions[r].size > 0; } else { /* Outbound */ po->powbar = (hose->regions[r].phys_start >> 12); po->potar = (hose->regions[r].bus_start >> 12); #ifdef CONFIG_SYS_PCI_64BIT po->potear = (hose->regions[r].bus_start >> 44); #else po->potear = 0; #endif if (hose->regions[r].flags & PCI_REGION_IO) po->powar = POWAR_EN | sz | POWAR_IO_READ | POWAR_IO_WRITE; else po->powar = POWAR_EN | sz | POWAR_MEM_READ | POWAR_MEM_WRITE; po++; } } pci_register_hose(hose); pciauto_config_init(hose); /* grab pci_{mem,prefetch,io} */ hose->current_busno = hose->first_busno; pci->pedr = 0xffffffff; /* Clear any errors */ pci->peer = ~0x20140; /* Enable All Error Interupts except * - Master abort (pci) * - Master PERR (pci) * - ICCA (PCIe) */ pci_hose_read_config_dword (hose, dev, PCI_DCR, &temp32); temp32 |= 0xf000e; /* set URR, FER, NFER (but not CER) */ pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32); pci_hose_read_config_byte (hose, dev, PCI_HEADER_TYPE, &temp8); bridge = temp8 & PCI_HEADER_TYPE_BRIDGE; /* Bridge, such as pcie */ if ( bridge ) { pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm); enabled = ltssm >= PCI_LTSSM_L0; #ifdef CONFIG_FSL_PCIE_RESET if (ltssm == 1) { int i; debug("....PCIe link error. " "LTSSM=0x%02x.", ltssm); pci->pdb_stat |= 0x08000000; /* assert PCIe reset */ temp32 = pci->pdb_stat; udelay(100); debug(" Asserting PCIe reset @%x = %x\n", &pci->pdb_stat, pci->pdb_stat); pci->pdb_stat &= ~0x08000000; /* clear reset */ asm("sync;isync"); for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) { pci_hose_read_config_word(hose, dev, PCI_LTSSM, <ssm); udelay(1000); debug("....PCIe link error. " "LTSSM=0x%02x.\n", ltssm); } enabled = ltssm >= PCI_LTSSM_L0; } #endif if (!enabled) { debug("....PCIE link error. Skipping scan." "LTSSM=0x%02x\n", ltssm); hose->last_busno = hose->first_busno; return; } pci->pme_msg_det = 0xffffffff; pci->pme_msg_int_en = 0xffffffff; #ifdef DEBUG pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16); neg_link_w = (temp16 & 0x3f0 ) >> 4; printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n", ltssm, neg_link_w); #endif hose->current_busno++; /* Start scan with secondary */ pciauto_prescan_setup_bridge(hose, dev, hose->current_busno); } /* Use generic setup_device to initialize standard pci regs, * but do not allocate any windows since any BAR found (such * as PCSRBAR) is not in this cpu's memory space. */ pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io); if (inbound) { pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16); pci_hose_write_config_word(hose, dev, PCI_COMMAND, temp16 | PCI_COMMAND_MEMORY); } #ifndef CONFIG_PCI_NOSCAN pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8); /* Programming Interface (PCI_CLASS_PROG) * 0 == pci host or pcie root-complex, * 1 == pci agent or pcie end-point */ if (!temp8) { printf(" Scanning PCI bus %02x\n", hose->current_busno); hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno); } else { debug(" Not scanning PCI bus %02x. PI=%x\n", hose->current_busno, temp8); hose->last_busno = hose->current_busno; } if ( bridge ) { /* update limit regs and subordinate busno */ pciauto_postscan_setup_bridge(hose, dev, hose->last_busno); } #else hose->last_busno = hose->current_busno; #endif /* Clear all error indications */ if (bridge) pci->pme_msg_det = 0xffffffff; pci->pedr = 0xffffffff; pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16); if (temp16) { pci_hose_write_config_word(hose, dev, PCI_DSR, 0xffff); } pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16); if (temp16) { pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff); } } /* Enable inbound PCI config cycles for agent/endpoint interface */ void fsl_pci_config_unlock(struct pci_controller *hose) { pci_dev_t dev = PCI_BDF(hose->first_busno,0,0); u8 agent; u8 pcie_cap; u16 pbfr; pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent); if (!agent) return; pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap); if (pcie_cap != 0x0) { /* PCIe - set CFG_READY bit of Configuration Ready Register */ pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1); } else { /* PCI - clear ACL bit of PBFR */ pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr); pbfr &= ~0x20; pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr); } } #ifdef CONFIG_OF_BOARD_SETUP #include <libfdt.h> #include <fdt_support.h> void ft_fsl_pci_setup(void *blob, const char *pci_alias, struct pci_controller *hose) { int off = fdt_path_offset(blob, pci_alias); if (off >= 0) { u32 bus_range[2]; bus_range[0] = 0; bus_range[1] = hose->last_busno - hose->first_busno; fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4); fdt_pci_dma_ranges(blob, off, hose); } } #endif