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.
34 #if defined(CONFIG_OF_LIBFDT)
36 #include <fdt_support.h>
39 struct pci_controller local_hose;
41 void tsi108_clear_pci_error (void)
43 u32 err_stat, err_addr, pci_stat;
46 * Quietly clear errors signalled as result of PCI/X configuration read
49 /* Read PB Error Log Registers */
50 err_stat = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
51 TSI108_PB_REG_OFFSET + PB_ERRCS);
52 err_addr = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
53 TSI108_PB_REG_OFFSET + PB_AERR);
54 if (err_stat & PB_ERRCS_ES) {
55 /* Clear PCI/X bus errors if applicable */
56 if ((err_addr & 0xFF000000) == CONFIG_SYS_PCI_CFG_BASE) {
57 /* Clear error flag */
58 *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE +
59 TSI108_PB_REG_OFFSET + PB_ERRCS) =
62 /* Clear read error reported in PB_ISR */
63 *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE +
64 TSI108_PB_REG_OFFSET + PB_ISR) =
67 /* Clear errors reported by PCI CSR (Normally Master Abort) */
68 pci_stat = *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
69 TSI108_PCI_REG_OFFSET +
71 *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
72 TSI108_PCI_REG_OFFSET + PCI_CSR) =
75 *(volatile u32 *)(CONFIG_SYS_TSI108_CSR_BASE +
76 TSI108_PCI_REG_OFFSET +
77 PCI_IRP_STAT) = PCI_IRP_STAT_P_CSR;
84 unsigned int __get_pci_config_dword (u32 addr)
88 __asm__ __volatile__ (" lwbrx %0,0,%1\n"
91 ".section .fixup,\"ax\"\n"
94 ".section __ex_table,\"a\"\n"
97 ".section .text.__get_pci_config_dword"
98 : "=r"(retval) : "r"(addr));
103 static int tsi108_read_config_dword (struct pci_controller *hose,
104 pci_dev_t dev, int offset, u32 * value)
106 dev &= (CONFIG_SYS_PCI_CFG_SIZE - 1);
107 dev |= (CONFIG_SYS_PCI_CFG_BASE | (offset & 0xfc));
108 *value = __get_pci_config_dword(dev);
109 if (0xFFFFFFFF == *value)
110 tsi108_clear_pci_error ();
114 static int tsi108_write_config_dword (struct pci_controller *hose,
115 pci_dev_t dev, int offset, u32 value)
117 dev &= (CONFIG_SYS_PCI_CFG_SIZE - 1);
118 dev |= (CONFIG_SYS_PCI_CFG_BASE | (offset & 0xfc));
120 out_le32 ((volatile unsigned *)dev, value);
125 void pci_init_board (void)
127 struct pci_controller *hose = (struct pci_controller *)&local_hose;
129 hose->first_busno = 0;
130 hose->last_busno = 0xff;
132 pci_set_region (hose->regions + 0,
133 CONFIG_SYS_PCI_MEMORY_BUS,
134 CONFIG_SYS_PCI_MEMORY_PHYS,
135 CONFIG_SYS_PCI_MEMORY_SIZE, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
137 /* PCI memory space */
138 pci_set_region (hose->regions + 1,
139 CONFIG_SYS_PCI_MEM_BUS,
140 CONFIG_SYS_PCI_MEM_PHYS, CONFIG_SYS_PCI_MEM_SIZE, PCI_REGION_MEM);
143 pci_set_region (hose->regions + 2,
144 CONFIG_SYS_PCI_IO_BUS,
145 CONFIG_SYS_PCI_IO_PHYS, CONFIG_SYS_PCI_IO_SIZE, PCI_REGION_IO);
147 hose->region_count = 3;
150 pci_hose_read_config_byte_via_dword,
151 pci_hose_read_config_word_via_dword,
152 tsi108_read_config_dword,
153 pci_hose_write_config_byte_via_dword,
154 pci_hose_write_config_word_via_dword,
155 tsi108_write_config_dword);
157 pci_register_hose (hose);
159 hose->last_busno = pci_hose_scan (hose);
161 debug ("Done PCI initialization\n");
165 #if defined(CONFIG_OF_LIBFDT)
166 void ft_pci_setup(void *blob, bd_t *bd)
172 nodeoffset = fdt_path_offset(blob, "/aliases");
173 if (nodeoffset >= 0) {
174 path = fdt_getprop(blob, nodeoffset, "pci", NULL);
176 tmp[0] = cpu_to_be32(local_hose.first_busno);
177 tmp[1] = cpu_to_be32(local_hose.last_busno);
178 do_fixup_by_path(blob, path, "bus-range",
179 &tmp, sizeof(tmp), 1);
183 #endif /* CONFIG_OF_LIBFDT */