2 * (C) Copyright 2004 Tundra Semiconductor Corp.
3 * Alex Bounine <alexandreb@tundra.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * PCI initialisation for the Tsi108 EMU board.
30 #ifdef CONFIG_TSI108_PCI
36 #if defined(CONFIG_OF_LIBFDT)
38 #include <fdt_support.h>
41 struct pci_controller local_hose;
43 void tsi108_clear_pci_error (void)
45 u32 err_stat, err_addr, pci_stat;
48 * Quietly clear errors signalled as result of PCI/X configuration read
51 /* Read PB Error Log Registers */
52 err_stat = *(volatile u32 *)(CFG_TSI108_CSR_BASE +
53 TSI108_PB_REG_OFFSET + PB_ERRCS);
54 err_addr = *(volatile u32 *)(CFG_TSI108_CSR_BASE +
55 TSI108_PB_REG_OFFSET + PB_AERR);
56 if (err_stat & PB_ERRCS_ES) {
57 /* Clear PCI/X bus errors if applicable */
58 if ((err_addr & 0xFF000000) == CFG_PCI_CFG_BASE) {
59 /* Clear error flag */
60 *(u32 *) (CFG_TSI108_CSR_BASE +
61 TSI108_PB_REG_OFFSET + PB_ERRCS) =
64 /* Clear read error reported in PB_ISR */
65 *(u32 *) (CFG_TSI108_CSR_BASE +
66 TSI108_PB_REG_OFFSET + PB_ISR) =
69 /* Clear errors reported by PCI CSR (Normally Master Abort) */
70 pci_stat = *(volatile u32 *)(CFG_TSI108_CSR_BASE +
71 TSI108_PCI_REG_OFFSET +
73 *(volatile u32 *)(CFG_TSI108_CSR_BASE +
74 TSI108_PCI_REG_OFFSET + PCI_CSR) =
77 *(volatile u32 *)(CFG_TSI108_CSR_BASE +
78 TSI108_PCI_REG_OFFSET +
79 PCI_IRP_STAT) = PCI_IRP_STAT_P_CSR;
86 unsigned int __get_pci_config_dword (u32 addr)
90 __asm__ __volatile__ (" lwbrx %0,0,%1\n"
93 ".section .fixup,\"ax\"\n"
96 ".section __ex_table,\"a\"\n"
99 ".text":"=r"(retval):"r"(addr));
104 static int tsi108_read_config_dword (struct pci_controller *hose,
105 pci_dev_t dev, int offset, u32 * value)
107 dev &= (CFG_PCI_CFG_SIZE - 1);
108 dev |= (CFG_PCI_CFG_BASE | (offset & 0xfc));
109 *value = __get_pci_config_dword(dev);
110 if (0xFFFFFFFF == *value)
111 tsi108_clear_pci_error ();
115 static int tsi108_write_config_dword (struct pci_controller *hose,
116 pci_dev_t dev, int offset, u32 value)
118 dev &= (CFG_PCI_CFG_SIZE - 1);
119 dev |= (CFG_PCI_CFG_BASE | (offset & 0xfc));
121 out_le32 ((volatile unsigned *)dev, value);
126 void pci_init_board (void)
128 struct pci_controller *hose = (struct pci_controller *)&local_hose;
130 hose->first_busno = 0;
131 hose->last_busno = 0xff;
133 pci_set_region (hose->regions + 0,
136 CFG_PCI_MEMORY_SIZE, PCI_REGION_MEM | PCI_REGION_MEMORY);
138 /* PCI memory space */
139 pci_set_region (hose->regions + 1,
141 CFG_PCI_MEM_PHYS, CFG_PCI_MEM_SIZE, PCI_REGION_MEM);
144 pci_set_region (hose->regions + 2,
146 CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO);
148 hose->region_count = 3;
151 pci_hose_read_config_byte_via_dword,
152 pci_hose_read_config_word_via_dword,
153 tsi108_read_config_dword,
154 pci_hose_write_config_byte_via_dword,
155 pci_hose_write_config_word_via_dword,
156 tsi108_write_config_dword);
158 pci_register_hose (hose);
160 hose->last_busno = pci_hose_scan (hose);
162 debug ("Done PCI initialization\n");
166 #if defined(CONFIG_OF_LIBFDT)
167 void ft_pci_setup(void *blob, bd_t *bd)
173 nodeoffset = fdt_path_offset(blob, "/aliases");
174 if (nodeoffset >= 0) {
175 path = fdt_getprop(blob, nodeoffset, "pci", NULL);
177 tmp[0] = cpu_to_be32(local_hose.first_busno);
178 tmp[1] = cpu_to_be32(local_hose.last_busno);
179 do_fixup_by_path(blob, path, "bus-range",
180 &tmp, sizeof(tmp), 1);
184 #endif /* CONFIG_OF_LIBFDT */
186 #endif /* CONFIG_TSI108_PCI */