/* * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. * TsiChung Liew (Tsi-Chung.Liew@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 */ /* * PCI Configuration space access support */ #include <common.h> #include <pci.h> #include <asm/io.h> #include <asm/immap.h> #if defined(CONFIG_PCI) /* System RAM mapped over PCI */ #define CFG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE #define CFG_PCI_SYS_MEM_PHYS CFG_SDRAM_BASE #define CFG_PCI_SYS_MEM_SIZE (1024 * 1024 * 1024) #define cfg_read(val, addr, type, op) *val = op((type)(addr)); #define cfg_write(val, addr, type, op) op((type *)(addr), (val)); #define PCI_OP(rw, size, type, op, mask) \ int pci_##rw##_cfg_##size(struct pci_controller *hose, \ pci_dev_t dev, int offset, type val) \ { \ u32 addr = 0; \ u16 cfg_type = 0; \ addr = ((offset & 0xfc) | cfg_type | (dev) | 0x80000000); \ out_be32(hose->cfg_addr, addr); \ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ __asm__ __volatile__("nop"); \ __asm__ __volatile__("nop"); \ out_be32(hose->cfg_addr, addr & 0x7fffffff); \ return 0; \ } PCI_OP(read, byte, u8 *, in_8, 3) PCI_OP(read, word, u16 *, in_le16, 2) PCI_OP(write, byte, u8, out_8, 3) PCI_OP(write, word, u16, out_le16, 2) PCI_OP(write, dword, u32, out_le32, 0) int pci_read_cfg_dword(struct pci_controller *hose, pci_dev_t dev, int offset, u32 * val) { u32 addr; u32 tmpv; u32 mask = 2; /* word access */ /* Read lower 16 bits */ addr = ((offset & 0xfc) | (dev) | 0x80000000); out_be32(hose->cfg_addr, addr); *val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); __asm__ __volatile__("nop"); out_be32(hose->cfg_addr, addr & 0x7fffffff); /* Read upper 16 bits */ offset += 2; addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000); out_be32(hose->cfg_addr, addr); tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); __asm__ __volatile__("nop"); out_be32(hose->cfg_addr, addr & 0x7fffffff); /* combine results into dword value */ *val = (tmpv << 16) | *val; return 0; } void pci_mcf547x_8x_init(struct pci_controller *hose) { volatile pci_t *pci = (volatile pci_t *) MMAP_PCI; volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; /* Port configuration */ gpio->par_pcibg = GPIO_PAR_PCIBG_PCIBG0(3) | GPIO_PAR_PCIBG_PCIBG1(3) | GPIO_PAR_PCIBG_PCIBG2(3) | GPIO_PAR_PCIBG_PCIBG3(3) | GPIO_PAR_PCIBG_PCIBG4(3); gpio->par_pcibr = GPIO_PAR_PCIBR_PCIBR0(3) | GPIO_PAR_PCIBR_PCIBR1(3) | GPIO_PAR_PCIBR_PCIBR2(3) | GPIO_PAR_PCIBR_PCIBR3(3) | GPIO_PAR_PCIBR_PCIBR4(3); /* Assert reset bit */ pci->gscr |= PCI_GSCR_PR; pci->tcr1 = PCI_TCR1_P; /* Initiator windows */ pci->iw0btar = CFG_PCI_MEM_PHYS | (CFG_PCI_MEM_PHYS >> 16); pci->iw1btar = CFG_PCI_IO_PHYS | (CFG_PCI_IO_PHYS >> 16); pci->iw2btar = CFG_PCI_CFG_PHYS | (CFG_PCI_CFG_PHYS >> 16); pci->iwcr = PCI_IWCR_W0C_EN | PCI_IWCR_W1C_EN | PCI_IWCR_W1C_IO | PCI_IWCR_W2C_EN | PCI_IWCR_W2C_IO; pci->icr = 0; /* Enable bus master and mem access */ pci->scr = PCI_SCR_B | PCI_SCR_M; /* Cache line size and master latency */ pci->cr1 = PCI_CR1_CLS(8) | PCI_CR1_LTMR(0xF8); pci->cr2 = 0; #ifdef CFG_PCI_BAR0 pci->bar0 = PCI_BAR_BAR0(CFG_PCI_BAR0); pci->tbatr0a = CFG_PCI_TBATR0 | PCI_TBATR_EN; #endif #ifdef CFG_PCI_BAR1 pci->bar1 = PCI_BAR_BAR1(CFG_PCI_BAR1); pci->tbatr1a = CFG_PCI_TBATR1 | PCI_TBATR_EN; #endif /* Deassert reset bit */ pci->gscr &= ~PCI_GSCR_PR; udelay(1000); /* Enable PCI bus master support */ hose->first_busno = 0; hose->last_busno = 0xff; pci_set_region(hose->regions + 0, CFG_PCI_MEM_BUS, CFG_PCI_MEM_PHYS, CFG_PCI_MEM_SIZE, PCI_REGION_MEM); pci_set_region(hose->regions + 1, CFG_PCI_IO_BUS, CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO); pci_set_region(hose->regions + 2, CFG_PCI_SYS_MEM_BUS, CFG_PCI_SYS_MEM_PHYS, CFG_PCI_SYS_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_MEMORY); hose->region_count = 3; hose->cfg_addr = &(pci->car); hose->cfg_data = (volatile unsigned char *)CFG_PCI_CFG_BUS; pci_set_ops(hose, pci_read_cfg_byte, pci_read_cfg_word, pci_read_cfg_dword, pci_write_cfg_byte, pci_write_cfg_word, pci_write_cfg_dword); /* Hose scan */ pci_register_hose(hose); hose->last_busno = pci_hose_scan(hose); } #endif /* CONFIG_PCI */