diff options
Diffstat (limited to 'arch/ppc/cpu/mpc8220/pci.c')
| -rw-r--r-- | arch/ppc/cpu/mpc8220/pci.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/arch/ppc/cpu/mpc8220/pci.c b/arch/ppc/cpu/mpc8220/pci.c new file mode 100644 index 0000000..7ef43b7 --- /dev/null +++ b/arch/ppc/cpu/mpc8220/pci.c @@ -0,0 +1,191 @@ +/* + * 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 CONFIG_SYS_SDRAM_BASE +#define CONFIG_PCI_SYS_MEM_PHYS CONFIG_SYS_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_SYS_MEMORY); + + hose->region_count = 3; + + hose->cfg_addr = &(xcpci->cfg_adr); + hose->cfg_data = (volatile unsigned char *)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 */ |