/* * Copyright 2004 Freescale Semiconductor. * Copyright (C) 2003 Motorola Inc. * Xianghua Xiao (x.xiao@motorola.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 for MPC8220 PCI Bridge */ #include <common.h> #include <mpc8220.h> #include <pci.h> #include <asm/io.h> #if defined(CONFIG_PCI) /* System RAM mapped over PCI */ #define CONFIG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE #define CONFIG_PCI_SYS_MEM_PHYS CFG_SDRAM_BASE #define CONFIG_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 mpc8220_pci_##rw##_config_##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); \ __asm__ __volatile__("sync"); \ cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ out_be32(hose->cfg_addr, addr & 0x7fffffff); \ __asm__ __volatile__("sync"); \ 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 mpc8220_pci_read_config_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); __asm__ __volatile__("sync"); *val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); out_be32(hose->cfg_addr, addr & 0x7fffffff); __asm__ __volatile__("sync"); /* Read upper 16 bits */ offset += 2; addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000); out_be32(hose->cfg_addr, addr); __asm__ __volatile__("sync"); tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask))); out_be32(hose->cfg_addr, addr & 0x7fffffff); __asm__ __volatile__("sync"); /* combine results into dword value */ *val = (tmpv << 16) | *val; return 0; } void pci_mpc8220_init(struct pci_controller *hose) { u32 win0, win1, win2; volatile mpc8220_xcpci_t *xcpci = (volatile mpc8220_xcpci_t *) MMAP_XCPCI; volatile pcfg8220_t *portcfg = (volatile pcfg8220_t *) MMAP_PCFG; win0 = (u32) CONFIG_PCI_MEM_PHYS; win1 = (u32) CONFIG_PCI_IO_PHYS; win2 = (u32) CONFIG_PCI_CFG_PHYS; /* Assert PCI reset */ out_be32 (&xcpci->glb_stat_ctl, PCI_GLB_STAT_CTRL_PR); /* Disable prefetching but read-multiples will still prefetch */ out_be32 (&xcpci->target_ctrl, 0x00000000); /* Initiator windows */ out_be32 (&xcpci->init_win0, (win0 >> 16) | win0 | 0x003f0000); out_be32 (&xcpci->init_win1, ((win1 >> 16) | win1 )); out_be32 (&xcpci->init_win2, ((win2 >> 16) | win2 )); out_be32 (&xcpci->init_win_cfg, PCI_INIT_WIN_CFG_WIN0_CTRL_EN | PCI_INIT_WIN_CFG_WIN1_CTRL_EN | PCI_INIT_WIN_CFG_WIN1_CTRL_IO | PCI_INIT_WIN_CFG_WIN2_CTRL_EN | PCI_INIT_WIN_CFG_WIN2_CTRL_IO); out_be32 (&xcpci->init_ctrl, 0x00000000); /* Enable bus master and mem access */ out_be32 (&xcpci->stat_cmd_reg, PCI_STAT_CMD_B | PCI_STAT_CMD_M); /* Cache line size and master latency */ out_be32 (&xcpci->bist_htyp_lat_cshl, (0xf8 << PCI_CFG1_LT_SHIFT)); out_be32 (&xcpci->base0, PCI_BASE_ADDR_REG0); /* 256MB - MBAR space */ out_be32 (&xcpci->base1, PCI_BASE_ADDR_REG1); /* 1GB - SDRAM space */ out_be32 (&xcpci->target_bar0, PCI_TARGET_BASE_ADDR_REG0 | PCI_TARGET_BASE_ADDR_EN); out_be32 (&xcpci->target_bar1, PCI_TARGET_BASE_ADDR_REG1 | PCI_TARGET_BASE_ADDR_EN); /* Deassert reset bit */ out_be32 (&xcpci->glb_stat_ctl, 0x00000000); /* Enable PCI bus master support */ /* Set PCIGNT1, PCIREQ1, PCIREQ0/PCIGNTIN, PCIGNT0/PCIREQOUT, PCIREQ2, PCIGNT2 */ out_be32((volatile u32 *)&portcfg->pcfg3, (in_be32((volatile u32 *)&portcfg->pcfg3) & 0xFC3FCE7F)); out_be32((volatile u32 *)&portcfg->pcfg3, (in_be32((volatile u32 *)&portcfg->pcfg3) | 0x01400180)); hose->first_busno = 0; hose->last_busno = 0xff; pci_set_region(hose->regions + 0, CONFIG_PCI_MEM_BUS, CONFIG_PCI_MEM_PHYS, CONFIG_PCI_MEM_SIZE, PCI_REGION_MEM); pci_set_region(hose->regions + 1, CONFIG_PCI_IO_BUS, CONFIG_PCI_IO_PHYS, CONFIG_PCI_IO_SIZE, PCI_REGION_IO); pci_set_region(hose->regions + 2, CONFIG_PCI_SYS_MEM_BUS, CONFIG_PCI_SYS_MEM_PHYS, CONFIG_PCI_SYS_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_MEMORY); hose->region_count = 3; hose->cfg_addr = &(xcpci->cfg_adr); hose->cfg_data = CONFIG_PCI_CFG_BUS; pci_set_ops(hose, mpc8220_pci_read_config_byte, mpc8220_pci_read_config_word, mpc8220_pci_read_config_dword, mpc8220_pci_write_config_byte, mpc8220_pci_write_config_word, mpc8220_pci_write_config_dword); /* Hose scan */ pci_register_hose(hose); hose->last_busno = pci_hose_scan(hose); out_be32 (&xcpci->base0, PCI_BASE_ADDR_REG0); /* 256MB - MBAR space */ out_be32 (&xcpci->base1, PCI_BASE_ADDR_REG1); /* 1GB - SDRAM space */ } #endif /* CONFIG_PCI */