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-rw-r--r--arch/mips/mti-malta/malta-pci.c243
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diff --git a/arch/mips/mti-malta/malta-pci.c b/arch/mips/mti-malta/malta-pci.c
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1/*
2 * Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc.
3 * All rights reserved.
4 * Authors: Carsten Langgaard <carstenl@mips.com>
5 * Maciej W. Rozycki <macro@mips.com>
6 *
7 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
8 *
9 * This program is free software; you can distribute it and/or modify it
10 * under the terms of the GNU General Public License (Version 2) as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
21 *
22 * MIPS boards specific PCI support.
23 */
24#include <linux/types.h>
25#include <linux/pci.h>
26#include <linux/kernel.h>
27#include <linux/init.h>
28
29#include <asm/gt64120.h>
30
31#include <asm/mips-boards/generic.h>
32#include <asm/mips-boards/bonito64.h>
33#include <asm/mips-boards/msc01_pci.h>
34
35static struct resource bonito64_mem_resource = {
36 .name = "Bonito PCI MEM",
37 .flags = IORESOURCE_MEM,
38};
39
40static struct resource bonito64_io_resource = {
41 .name = "Bonito PCI I/O",
42 .start = 0x00000000UL,
43 .end = 0x000fffffUL,
44 .flags = IORESOURCE_IO,
45};
46
47static struct resource gt64120_mem_resource = {
48 .name = "GT-64120 PCI MEM",
49 .flags = IORESOURCE_MEM,
50};
51
52static struct resource gt64120_io_resource = {
53 .name = "GT-64120 PCI I/O",
54 .flags = IORESOURCE_IO,
55};
56
57static struct resource msc_mem_resource = {
58 .name = "MSC PCI MEM",
59 .flags = IORESOURCE_MEM,
60};
61
62static struct resource msc_io_resource = {
63 .name = "MSC PCI I/O",
64 .flags = IORESOURCE_IO,
65};
66
67extern struct pci_ops bonito64_pci_ops;
68extern struct pci_ops gt64xxx_pci0_ops;
69extern struct pci_ops msc_pci_ops;
70
71static struct pci_controller bonito64_controller = {
72 .pci_ops = &bonito64_pci_ops,
73 .io_resource = &bonito64_io_resource,
74 .mem_resource = &bonito64_mem_resource,
75 .io_offset = 0x00000000UL,
76};
77
78static struct pci_controller gt64120_controller = {
79 .pci_ops = &gt64xxx_pci0_ops,
80 .io_resource = &gt64120_io_resource,
81 .mem_resource = &gt64120_mem_resource,
82};
83
84static struct pci_controller msc_controller = {
85 .pci_ops = &msc_pci_ops,
86 .io_resource = &msc_io_resource,
87 .mem_resource = &msc_mem_resource,
88};
89
90void __init mips_pcibios_init(void)
91{
92 struct pci_controller *controller;
93 resource_size_t start, end, map, start1, end1, map1, map2, map3, mask;
94
95 switch (mips_revision_sconid) {
96 case MIPS_REVISION_SCON_GT64120:
97 /*
98 * Due to a bug in the Galileo system controller, we need
99 * to setup the PCI BAR for the Galileo internal registers.
100 * This should be done in the bios/bootprom and will be
101 * fixed in a later revision of YAMON (the MIPS boards
102 * boot prom).
103 */
104 GT_WRITE(GT_PCI0_CFGADDR_OFS,
105 (0 << GT_PCI0_CFGADDR_BUSNUM_SHF) | /* Local bus */
106 (0 << GT_PCI0_CFGADDR_DEVNUM_SHF) | /* GT64120 dev */
107 (0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) | /* Function 0*/
108 ((0x20/4) << GT_PCI0_CFGADDR_REGNUM_SHF) | /* BAR 4*/
109 GT_PCI0_CFGADDR_CONFIGEN_BIT);
110
111 /* Perform the write */
112 GT_WRITE(GT_PCI0_CFGDATA_OFS, CPHYSADDR(MIPS_GT_BASE));
113
114 /* Set up resource ranges from the controller's registers. */
115 start = GT_READ(GT_PCI0M0LD_OFS);
116 end = GT_READ(GT_PCI0M0HD_OFS);
117 map = GT_READ(GT_PCI0M0REMAP_OFS);
118 end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
119 start1 = GT_READ(GT_PCI0M1LD_OFS);
120 end1 = GT_READ(GT_PCI0M1HD_OFS);
121 map1 = GT_READ(GT_PCI0M1REMAP_OFS);
122 end1 = (end1 & GT_PCI_HD_MSK) | (start1 & ~GT_PCI_HD_MSK);
123 /* Cannot support multiple windows, use the wider. */
124 if (end1 - start1 > end - start) {
125 start = start1;
126 end = end1;
127 map = map1;
128 }
129 mask = ~(start ^ end);
130 /* We don't support remapping with a discontiguous mask. */
131 BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
132 mask != ~((mask & -mask) - 1));
133 gt64120_mem_resource.start = start;
134 gt64120_mem_resource.end = end;
135 gt64120_controller.mem_offset = (start & mask) - (map & mask);
136 /* Addresses are 36-bit, so do shifts in the destinations. */
137 gt64120_mem_resource.start <<= GT_PCI_DCRM_SHF;
138 gt64120_mem_resource.end <<= GT_PCI_DCRM_SHF;
139 gt64120_mem_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
140 gt64120_controller.mem_offset <<= GT_PCI_DCRM_SHF;
141
142 start = GT_READ(GT_PCI0IOLD_OFS);
143 end = GT_READ(GT_PCI0IOHD_OFS);
144 map = GT_READ(GT_PCI0IOREMAP_OFS);
145 end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
146 mask = ~(start ^ end);
147 /* We don't support remapping with a discontiguous mask. */
148 BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
149 mask != ~((mask & -mask) - 1));
150 gt64120_io_resource.start = map & mask;
151 gt64120_io_resource.end = (map & mask) | ~mask;
152 gt64120_controller.io_offset = 0;
153 /* Addresses are 36-bit, so do shifts in the destinations. */
154 gt64120_io_resource.start <<= GT_PCI_DCRM_SHF;
155 gt64120_io_resource.end <<= GT_PCI_DCRM_SHF;
156 gt64120_io_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
157
158 controller = &gt64120_controller;
159 break;
160
161 case MIPS_REVISION_SCON_BONITO:
162 /* Set up resource ranges from the controller's registers. */
163 map = BONITO_PCIMAP;
164 map1 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO0) >>
165 BONITO_PCIMAP_PCIMAP_LO0_SHIFT;
166 map2 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO1) >>
167 BONITO_PCIMAP_PCIMAP_LO1_SHIFT;
168 map3 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO2) >>
169 BONITO_PCIMAP_PCIMAP_LO2_SHIFT;
170 /* Combine as many adjacent windows as possible. */
171 map = map1;
172 start = BONITO_PCILO0_BASE;
173 end = 1;
174 if (map3 == map2 + 1) {
175 map = map2;
176 start = BONITO_PCILO1_BASE;
177 end++;
178 }
179 if (map2 == map1 + 1) {
180 map = map1;
181 start = BONITO_PCILO0_BASE;
182 end++;
183 }
184 bonito64_mem_resource.start = start;
185 bonito64_mem_resource.end = start +
186 BONITO_PCIMAP_WINBASE(end) - 1;
187 bonito64_controller.mem_offset = start -
188 BONITO_PCIMAP_WINBASE(map);
189
190 controller = &bonito64_controller;
191 break;
192
193 case MIPS_REVISION_SCON_SOCIT:
194 case MIPS_REVISION_SCON_ROCIT:
195 case MIPS_REVISION_SCON_SOCITSC:
196 case MIPS_REVISION_SCON_SOCITSCP:
197 /* Set up resource ranges from the controller's registers. */
198 MSC_READ(MSC01_PCI_SC2PMBASL, start);
199 MSC_READ(MSC01_PCI_SC2PMMSKL, mask);
200 MSC_READ(MSC01_PCI_SC2PMMAPL, map);
201 msc_mem_resource.start = start & mask;
202 msc_mem_resource.end = (start & mask) | ~mask;
203 msc_controller.mem_offset = (start & mask) - (map & mask);
204
205 MSC_READ(MSC01_PCI_SC2PIOBASL, start);
206 MSC_READ(MSC01_PCI_SC2PIOMSKL, mask);
207 MSC_READ(MSC01_PCI_SC2PIOMAPL, map);
208 msc_io_resource.start = map & mask;
209 msc_io_resource.end = (map & mask) | ~mask;
210 msc_controller.io_offset = 0;
211 ioport_resource.end = ~mask;
212
213 /* If ranges overlap I/O takes precedence. */
214 start = start & mask;
215 end = start | ~mask;
216 if ((start >= msc_mem_resource.start &&
217 start <= msc_mem_resource.end) ||
218 (end >= msc_mem_resource.start &&
219 end <= msc_mem_resource.end)) {
220 /* Use the larger space. */
221 start = max(start, msc_mem_resource.start);
222 end = min(end, msc_mem_resource.end);
223 if (start - msc_mem_resource.start >=
224 msc_mem_resource.end - end)
225 msc_mem_resource.end = start - 1;
226 else
227 msc_mem_resource.start = end + 1;
228 }
229
230 controller = &msc_controller;
231 break;
232 default:
233 return;
234 }
235
236 if (controller->io_resource->start < 0x00001000UL) /* FIXME */
237 controller->io_resource->start = 0x00001000UL;
238
239 iomem_resource.end &= 0xfffffffffULL; /* 64 GB */
240 ioport_resource.end = controller->io_resource->end;
241
242 register_pci_controller(controller);
243}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-30 14:26:17 -0500