--- /dev/null
+/*
+ * 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 */
projects / thirdparty / u-boot.git / blobdiff