From 9226e7d6f09b9a1ac074cd918c81225a4689bba8 Mon Sep 17 00:00:00 2001 From: roy zang Date: Thu, 2 Nov 2006 19:11:06 +0800 Subject: Tsi108 on chip pci controller support. If there is no pci card, the tsi108/109 pci configure read will cause a machine check exception to the processor. PCI error should also be cleared after the read. Signed-off-by: Alexandre Bounine Signed-off-by: Roy Zang --- drivers/tsi108_pci.c | 178 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) create mode 100644 drivers/tsi108_pci.c (limited to 'drivers/tsi108_pci.c') diff --git a/drivers/tsi108_pci.c b/drivers/tsi108_pci.c new file mode 100644 index 00000000000..f374ede6620 --- /dev/null +++ b/drivers/tsi108_pci.c @@ -0,0 +1,178 @@ +/* + * (C) Copyright 2004 Tundra Semiconductor Corp. + * Alex Bounine + * + * 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 + +#ifdef CONFIG_TSI108_PCI + +#include +#include +#include +#include + +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 *)(CFG_TSI108_CSR_BASE + + TSI108_PB_REG_OFFSET + PB_ERRCS); + err_addr = *(volatile u32 *)(CFG_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) == CFG_PCI_CFG_BASE) { + /* Clear error flag */ + *(u32 *) (CFG_TSI108_CSR_BASE + + TSI108_PB_REG_OFFSET + PB_ERRCS) = + PB_ERRCS_ES; + + /* Clear read error reported in PB_ISR */ + *(u32 *) (CFG_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 *)(CFG_TSI108_CSR_BASE + + TSI108_PCI_REG_OFFSET + + PCI_CSR); + *(volatile u32 *)(CFG_TSI108_CSR_BASE + + TSI108_PCI_REG_OFFSET + PCI_CSR) = + pci_stat; + + *(volatile u32 *)(CFG_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" + ".text":"=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 &= (CFG_PCI_CFG_SIZE - 1); + dev |= (CFG_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 &= (CFG_PCI_CFG_SIZE - 1); + dev |= (CFG_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, + CFG_PCI_MEMORY_BUS, + CFG_PCI_MEMORY_PHYS, + CFG_PCI_MEMORY_SIZE, PCI_REGION_MEM | PCI_REGION_MEMORY); + + /* PCI memory space */ + pci_set_region(hose->regions + 1, + CFG_PCI_MEM_BUS, + CFG_PCI_MEM_PHYS, CFG_PCI_MEM_SIZE, PCI_REGION_MEM); + + /* PCI I/O space */ + pci_set_region(hose->regions + 2, + CFG_PCI_IO_BUS, + CFG_PCI_IO_PHYS, CFG_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; +} + +#ifdef CONFIG_OF_FLAT_TREE +void +ft_pci_setup(void *blob, bd_t *bd) +{ + u32 *p; + int len; + + p = (u32 *)ft_get_prop(blob, "/" OF_TSI "/pci@1000/bus-range", &len); + if (p != NULL) { + p[0] = local_hose.first_busno; + p[1] = local_hose.last_busno; + } + +} +#endif + +#endif /* CONFIG_TSI108_PCI */ -- cgit v1.2.3 From ee311214e0d216f904feea269599d0934bf71f23 Mon Sep 17 00:00:00 2001 From: roy zang Date: Fri, 1 Dec 2006 11:47:36 +0800 Subject: Clean up the code according to codestyle: (1) remove some C++ comments. (2) remove trailing white space. (3) remove trailing empty line. (4) Indentation by table. (5) remove {} in one line condition. (6) add space before '(' in function call. Remove some weird printf () output. Add necessary comments. Modified Makefile to support building in a separate directory. --- drivers/tsi108_pci.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) (limited to 'drivers/tsi108_pci.c') diff --git a/drivers/tsi108_pci.c b/drivers/tsi108_pci.c index f374ede6620..9f606df5180 100644 --- a/drivers/tsi108_pci.c +++ b/drivers/tsi108_pci.c @@ -36,7 +36,7 @@ struct pci_controller local_hose; -void tsi108_clear_pci_error(void) +void tsi108_clear_pci_error (void) { u32 err_stat, err_addr, pci_stat; @@ -79,11 +79,11 @@ void tsi108_clear_pci_error(void) return; } -unsigned int __get_pci_config_dword(u32 addr) +unsigned int __get_pci_config_dword (u32 addr) { unsigned int retval; - __asm__ __volatile__(" lwbrx %0,0,%1\n" + __asm__ __volatile__ (" lwbrx %0,0,%1\n" "1: eieio\n" "2:\n" ".section .fixup,\"ax\"\n" @@ -97,53 +97,53 @@ unsigned int __get_pci_config_dword(u32 addr) return (retval); } -static int tsi108_read_config_dword(struct pci_controller *hose, +static int tsi108_read_config_dword (struct pci_controller *hose, pci_dev_t dev, int offset, u32 * value) { dev &= (CFG_PCI_CFG_SIZE - 1); dev |= (CFG_PCI_CFG_BASE | (offset & 0xfc)); *value = __get_pci_config_dword(dev); if (0xFFFFFFFF == *value) - tsi108_clear_pci_error(); + tsi108_clear_pci_error (); return 0; } -static int tsi108_write_config_dword(struct pci_controller *hose, +static int tsi108_write_config_dword (struct pci_controller *hose, pci_dev_t dev, int offset, u32 value) { dev &= (CFG_PCI_CFG_SIZE - 1); dev |= (CFG_PCI_CFG_BASE | (offset & 0xfc)); - out_le32((volatile unsigned *)dev, value); + out_le32 ((volatile unsigned *)dev, value); return 0; } -void pci_init_board(void) +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, + pci_set_region (hose->regions + 0, CFG_PCI_MEMORY_BUS, CFG_PCI_MEMORY_PHYS, CFG_PCI_MEMORY_SIZE, PCI_REGION_MEM | PCI_REGION_MEMORY); /* PCI memory space */ - pci_set_region(hose->regions + 1, + pci_set_region (hose->regions + 1, CFG_PCI_MEM_BUS, CFG_PCI_MEM_PHYS, CFG_PCI_MEM_SIZE, PCI_REGION_MEM); /* PCI I/O space */ - pci_set_region(hose->regions + 2, + pci_set_region (hose->regions + 2, CFG_PCI_IO_BUS, CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO); hose->region_count = 3; - pci_set_ops(hose, + pci_set_ops (hose, pci_hose_read_config_byte_via_dword, pci_hose_read_config_word_via_dword, tsi108_read_config_dword, @@ -151,22 +151,22 @@ void pci_init_board(void) pci_hose_write_config_word_via_dword, tsi108_write_config_dword); - pci_register_hose(hose); + pci_register_hose (hose); - hose->last_busno = pci_hose_scan(hose); + hose->last_busno = pci_hose_scan (hose); - debug("Done PCI initialization\n"); + debug ("Done PCI initialization\n"); return; } #ifdef CONFIG_OF_FLAT_TREE void -ft_pci_setup(void *blob, bd_t *bd) +ft_pci_setup (void *blob, bd_t *bd) { u32 *p; int len; - p = (u32 *)ft_get_prop(blob, "/" OF_TSI "/pci@1000/bus-range", &len); + p = (u32 *)ft_get_prop (blob, "/" OF_TSI "/pci@1000/bus-range", &len); if (p != NULL) { p[0] = local_hose.first_busno; p[1] = local_hose.last_busno; -- cgit v1.2.3