diff options
Diffstat (limited to 'u-boot/drivers/pci/tsi108_pci.c')
| -rw-r--r-- | u-boot/drivers/pci/tsi108_pci.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/u-boot/drivers/pci/tsi108_pci.c b/u-boot/drivers/pci/tsi108_pci.c new file mode 100644 index 0000000..c568bf9 --- /dev/null +++ b/u-boot/drivers/pci/tsi108_pci.c @@ -0,0 +1,183 @@ +/* + * (C) Copyright 2004 Tundra Semiconductor Corp. + * Alex Bounine <alexandreb@tundra.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 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 */ |