+++ /dev/null
-/*
- * (C) Copyright 2004 Tundra Semiconductor Corp.
- * Alex Bounine <alexandreb@tundra.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-/*
- * PCI initialisation for the Tsi108 EMU board.
- */
-
-#include <config.h>
-
-#include <common.h>
-#include <pci.h>
-#include <asm/io.h>
-#include <tsi108.h>
-#if defined(CONFIG_OF_LIBFDT)
-#include <libfdt.h>
-#include <fdt_support.h>
-#endif
-
-struct pci_controller local_hose;
-
-void tsi108_clear_pci_error (void)
-{
- u32 err_stat, err_addr, pci_stat;
-
- /*
- * Quietly clear errors signalled as result of PCI/X configuration read
- * requests.
- */
- /* Read PB Error Log Registers */
- err_stat = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PB_REG_OFFSET + PB_ERRCS);
- err_addr = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PB_REG_OFFSET + PB_AERR);
- if (err_stat & PB_ERRCS_ES) {
- /* Clear PCI/X bus errors if applicable */
- if ((err_addr & 0xFF000000) == CONFIG_SYS_PCI_CFG_BASE) {
- /* Clear error flag */
- *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PB_REG_OFFSET + PB_ERRCS) =
- PB_ERRCS_ES;
-
- /* Clear read error reported in PB_ISR */
- *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PB_REG_OFFSET + PB_ISR) =
- PB_ISR_PBS_RD_ERR;
-
- /* Clear errors reported by PCI CSR (Normally Master Abort) */
- pci_stat = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PCI_REG_OFFSET +
- PCI_CSR);
- *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PCI_REG_OFFSET + PCI_CSR) =
- pci_stat;
-
- *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
- TSI108_PCI_REG_OFFSET +
- PCI_IRP_STAT) = PCI_IRP_STAT_P_CSR;
- }
- }
-
- return;
-}
-
-unsigned int __get_pci_config_dword (u32 addr)
-{
- unsigned int retval;
-
- __asm__ __volatile__ (" lwbrx %0,0,%1\n"
- "1: eieio\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- "3: li %0,-1\n"
- " b 2b\n"
- ".section __ex_table,\"a\"\n"
- " .align 2\n"
- " .long 1b,3b\n"
- ".section .text.__get_pci_config_dword"
- : "=r"(retval) : "r"(addr));
-
- return (retval);
-}
-
-static int tsi108_read_config_dword (struct pci_controller *hose,
- pci_dev_t dev, int offset, u32 * value)
-{
- dev &= (CONFIG_SYS_PCI_CFG_SIZE - 1);
- dev |= (CONFIG_SYS_PCI_CFG_BASE | (offset & 0xfc));
- *value = __get_pci_config_dword(dev);
- if (0xFFFFFFFF == *value)
- tsi108_clear_pci_error ();
- return 0;
-}
-
-static int tsi108_write_config_dword (struct pci_controller *hose,
- pci_dev_t dev, int offset, u32 value)
-{
- dev &= (CONFIG_SYS_PCI_CFG_SIZE - 1);
- dev |= (CONFIG_SYS_PCI_CFG_BASE | (offset & 0xfc));
-
- out_le32 ((volatile unsigned *)dev, value);
-
- return 0;
-}
-
-void pci_init_board (void)
-{
- struct pci_controller *hose = (struct pci_controller *)&local_hose;
-
- hose->first_busno = 0;
- hose->last_busno = 0xff;
-
- pci_set_region (hose->regions + 0,
- CONFIG_SYS_PCI_MEMORY_BUS,
- CONFIG_SYS_PCI_MEMORY_PHYS,
- CONFIG_SYS_PCI_MEMORY_SIZE, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
-
- /* PCI memory space */
- pci_set_region (hose->regions + 1,
- CONFIG_SYS_PCI_MEM_BUS,
- CONFIG_SYS_PCI_MEM_PHYS, CONFIG_SYS_PCI_MEM_SIZE, PCI_REGION_MEM);
-
- /* PCI I/O space */
- pci_set_region (hose->regions + 2,
- CONFIG_SYS_PCI_IO_BUS,
- CONFIG_SYS_PCI_IO_PHYS, CONFIG_SYS_PCI_IO_SIZE, PCI_REGION_IO);
-
- hose->region_count = 3;
-
- pci_set_ops (hose,
- pci_hose_read_config_byte_via_dword,
- pci_hose_read_config_word_via_dword,
- tsi108_read_config_dword,
- pci_hose_write_config_byte_via_dword,
- pci_hose_write_config_word_via_dword,
- tsi108_write_config_dword);
-
- pci_register_hose (hose);
-
- hose->last_busno = pci_hose_scan (hose);
-
- debug ("Done PCI initialization\n");
- return;
-}
-
-#if defined(CONFIG_OF_LIBFDT)
-void ft_pci_setup(void *blob, bd_t *bd)
-{
- int nodeoffset;
- int tmp[2];
- const char *path;
-
- nodeoffset = fdt_path_offset(blob, "/aliases");
- if (nodeoffset >= 0) {
- path = fdt_getprop(blob, nodeoffset, "pci", NULL);
- if (path) {
- tmp[0] = cpu_to_be32(local_hose.first_busno);
- tmp[1] = cpu_to_be32(local_hose.last_busno);
- do_fixup_by_path(blob, path, "bus-range",
- &tmp, sizeof(tmp), 1);
- }
- }
-}
-#endif /* CONFIG_OF_LIBFDT */