2 * Copyright (C) 2004 by Basler Vision Technologies AG
3 * Author: Thomas Koeller <thomas.koeller@baslerweb.com>
4 * Based on the PMC-Sierra Yosemite board support by Ralf Baechle.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/init.h>
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/pci.h>
24 #include <linux/bitops.h>
25 #include <asm/rm9k-ocd.h>
29 extern struct pci_ops titan_pci_ops;
32 static struct resource
35 .start = EXCITE_PHYS_PCI_MEM,
36 .end = EXCITE_PHYS_PCI_MEM + EXCITE_SIZE_PCI_MEM - 1,
37 .flags = IORESOURCE_MEM
41 .start = EXCITE_PHYS_PCI_IO,
42 .end = EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1,
43 .flags = IORESOURCE_IO
47 static struct pci_controller bx_controller = {
48 .pci_ops = &titan_pci_ops,
49 .mem_resource = &mem_resource,
50 .mem_offset = 0x00000000UL,
51 .io_resource = &io_resource,
52 .io_offset = 0x00000000UL
57 iopage_failed[] __initdata = "Cannot allocate PCI I/O page",
58 modebits_no_pci[] __initdata = "PCI is not configured in mode bits";
60 #define RM9000x2_OCD_HTSC 0x0604
61 #define RM9000x2_OCD_HTBHL 0x060c
62 #define RM9000x2_OCD_PCIHRST 0x078c
64 #define RM9K_OCD_MODEBIT1 0x00d4 /* (MODEBIT1) Mode Bit 1 */
65 #define RM9K_OCD_CPHDCR 0x00f4 /* CPU-PCI/HT Data Control. */
67 #define PCISC_FB2B 0x00000200
68 #define PCISC_MWICG 0x00000010
69 #define PCISC_EMC 0x00000004
70 #define PCISC_ERMA 0x00000002
74 static int __init basler_excite_pci_setup(void)
76 const unsigned int fullbars = memsize / (256 << 20);
79 /* Check modebits to see if PCI is really enabled. */
80 if (!((ocd_readl(RM9K_OCD_MODEBIT1) >> (47-32)) & 0x1))
81 panic(modebits_no_pci);
83 if (NULL == request_mem_region(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO,
84 "Memory-mapped PCI I/O page"))
87 /* Enable PCI 0 as master for config cycles */
88 ocd_writel(PCISC_EMC | PCISC_ERMA, RM9000x2_OCD_HTSC);
91 /* Set up latency timer */
92 ocd_writel(0x8008, RM9000x2_OCD_HTBHL);
94 /* Setup host IO and Memory space */
95 ocd_writel((EXCITE_PHYS_PCI_IO >> 4) | 1, LKB7);
96 ocd_writel(((EXCITE_SIZE_PCI_IO >> 4) & 0x7fffff00) - 0x100, LKM7);
97 ocd_writel((EXCITE_PHYS_PCI_MEM >> 4) | 1, LKB8);
98 ocd_writel(((EXCITE_SIZE_PCI_MEM >> 4) & 0x7fffff00) - 0x100, LKM8);
100 /* Set up PCI BARs to map all installed memory */
101 for (i = 0; i < 6; i++) {
102 const unsigned int bar = 0x610 + i * 4;
105 ocd_writel(0x10000000 * i, bar);
106 ocd_writel(0x01000000 * i, bar + 0x140);
107 ocd_writel(0x0ffff029, bar + 0x100);
115 const unsigned long rem = memsize - i * 0x10000000;
117 ocd_writel(0x00000000, bar + 0x100);
122 if (rem & ~(0x1 << o))
124 mask = ((0x1 << o) & 0x0ffff000) - 0x1000;
125 ocd_writel(0x10000000 * i, bar);
126 ocd_writel(0x01000000 * i, bar + 0x140);
127 ocd_writel(0x00000029 | mask, bar + 0x100);
131 ocd_writel(0x00000000, bar + 0x100);
134 /* Finally, enable the PCI interupt */
136 set_c0_intcontrol(1 << USB_IRQ);
138 set_c0_status(1 << (USB_IRQ + 8));
141 ioport_resource.start = EXCITE_PHYS_PCI_IO;
142 ioport_resource.end = EXCITE_PHYS_PCI_IO + EXCITE_SIZE_PCI_IO - 1;
143 set_io_port_base((unsigned long) ioremap_nocache(EXCITE_PHYS_PCI_IO, EXCITE_SIZE_PCI_IO));
144 register_pci_controller(&bx_controller);
149 arch_initcall(basler_excite_pci_setup);