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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 2001 Dave Engebretsen, IBM Corporation |
3 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM | |
4 | * | |
5 | * pSeries specific routines for PCI. | |
6 | * | |
1da177e4 LT |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
c5a3c2e5 AB |
22 | #include <linux/init.h> |
23 | #include <linux/ioport.h> | |
1da177e4 | 24 | #include <linux/kernel.h> |
1da177e4 LT |
25 | #include <linux/pci.h> |
26 | #include <linux/string.h> | |
1da177e4 | 27 | |
c3b9d9ab | 28 | #include <asm/eeh.h> |
1da177e4 | 29 | #include <asm/pci-bridge.h> |
c5a3c2e5 | 30 | #include <asm/prom.h> |
d387899f | 31 | #include <asm/ppc-pci.h> |
1da177e4 | 32 | |
1da177e4 LT |
33 | #if 0 |
34 | void pcibios_name_device(struct pci_dev *dev) | |
35 | { | |
36 | struct device_node *dn; | |
37 | ||
38 | /* | |
39 | * Add IBM loc code (slot) as a prefix to the device names for service | |
40 | */ | |
41 | dn = pci_device_to_OF_node(dev); | |
42 | if (dn) { | |
724c6abf TB |
43 | const char *loc_code = of_get_property(dn, "ibm,loc-code", |
44 | NULL); | |
1da177e4 LT |
45 | if (loc_code) { |
46 | int loc_len = strlen(loc_code); | |
47 | if (loc_len < sizeof(dev->dev.name)) { | |
48 | memmove(dev->dev.name+loc_len+1, dev->dev.name, | |
49 | sizeof(dev->dev.name)-loc_len-1); | |
50 | memcpy(dev->dev.name, loc_code, loc_len); | |
51 | dev->dev.name[loc_len] = ' '; | |
52 | dev->dev.name[sizeof(dev->dev.name)-1] = '\0'; | |
53 | } | |
54 | } | |
55 | } | |
56 | } | |
57 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); | |
58 | #endif | |
59 | ||
1da177e4 LT |
60 | static void __init pSeries_request_regions(void) |
61 | { | |
62 | if (!isa_io_base) | |
63 | return; | |
64 | ||
65 | request_region(0x20,0x20,"pic1"); | |
66 | request_region(0xa0,0x20,"pic2"); | |
67 | request_region(0x00,0x20,"dma1"); | |
68 | request_region(0x40,0x20,"timer"); | |
69 | request_region(0x80,0x10,"dma page reg"); | |
70 | request_region(0xc0,0x20,"dma2"); | |
71 | } | |
72 | ||
73 | void __init pSeries_final_fixup(void) | |
74 | { | |
1da177e4 LT |
75 | pSeries_request_regions(); |
76 | ||
3ab96a02 | 77 | eeh_addr_cache_build(); |
1da177e4 LT |
78 | } |
79 | ||
80 | /* | |
81 | * Assume the winbond 82c105 is the IDE controller on a | |
0bcace3b | 82 | * p610/p615/p630. We should probably be more careful in case |
1da177e4 LT |
83 | * someone tries to plug in a similar adapter. |
84 | */ | |
85 | static void fixup_winbond_82c105(struct pci_dev* dev) | |
86 | { | |
87 | int i; | |
88 | unsigned int reg; | |
89 | ||
e8222502 | 90 | if (!machine_is(pseries)) |
1da177e4 LT |
91 | return; |
92 | ||
93 | printk("Using INTC for W82c105 IDE controller.\n"); | |
94 | pci_read_config_dword(dev, 0x40, ®); | |
95 | /* Enable LEGIRQ to use INTC instead of ISA interrupts */ | |
96 | pci_write_config_dword(dev, 0x40, reg | (1<<11)); | |
97 | ||
98 | for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { | |
99 | /* zap the 2nd function of the winbond chip */ | |
100 | if (dev->resource[i].flags & IORESOURCE_IO | |
101 | && dev->bus->number == 0 && dev->devfn == 0x81) | |
102 | dev->resource[i].flags &= ~IORESOURCE_IO; | |
2d99c41f OH |
103 | if (dev->resource[i].start == 0 && dev->resource[i].end) { |
104 | dev->resource[i].flags = 0; | |
105 | dev->resource[i].end = 0; | |
106 | } | |
1da177e4 LT |
107 | } |
108 | } | |
109 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, | |
110 | fixup_winbond_82c105); | |
d82fb31a KSS |
111 | |
112 | int pseries_root_bridge_prepare(struct pci_host_bridge *bridge) | |
113 | { | |
114 | struct device_node *dn, *pdn; | |
115 | struct pci_bus *bus; | |
b020cc6c KSS |
116 | u32 pcie_link_speed_stats[2]; |
117 | int rc; | |
d82fb31a KSS |
118 | |
119 | bus = bridge->bus; | |
120 | ||
121 | dn = pcibios_get_phb_of_node(bus); | |
122 | if (!dn) | |
123 | return 0; | |
124 | ||
125 | for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) { | |
b020cc6c KSS |
126 | rc = of_property_read_u32_array(pdn, |
127 | "ibm,pcie-link-speed-stats", | |
128 | &pcie_link_speed_stats[0], 2); | |
129 | if (!rc) | |
d82fb31a KSS |
130 | break; |
131 | } | |
132 | ||
133 | of_node_put(pdn); | |
134 | ||
b020cc6c | 135 | if (rc) { |
d82fb31a KSS |
136 | pr_err("no ibm,pcie-link-speed-stats property\n"); |
137 | return 0; | |
138 | } | |
139 | ||
b020cc6c | 140 | switch (pcie_link_speed_stats[0]) { |
d82fb31a KSS |
141 | case 0x01: |
142 | bus->max_bus_speed = PCIE_SPEED_2_5GT; | |
143 | break; | |
144 | case 0x02: | |
145 | bus->max_bus_speed = PCIE_SPEED_5_0GT; | |
146 | break; | |
49d9684a KSS |
147 | case 0x04: |
148 | bus->max_bus_speed = PCIE_SPEED_8_0GT; | |
149 | break; | |
d82fb31a KSS |
150 | default: |
151 | bus->max_bus_speed = PCI_SPEED_UNKNOWN; | |
152 | break; | |
153 | } | |
154 | ||
b020cc6c | 155 | switch (pcie_link_speed_stats[1]) { |
d82fb31a KSS |
156 | case 0x01: |
157 | bus->cur_bus_speed = PCIE_SPEED_2_5GT; | |
158 | break; | |
159 | case 0x02: | |
160 | bus->cur_bus_speed = PCIE_SPEED_5_0GT; | |
161 | break; | |
49d9684a KSS |
162 | case 0x04: |
163 | bus->cur_bus_speed = PCIE_SPEED_8_0GT; | |
164 | break; | |
d82fb31a KSS |
165 | default: |
166 | bus->cur_bus_speed = PCI_SPEED_UNKNOWN; | |
167 | break; | |
168 | } | |
169 | ||
170 | return 0; | |
171 | } |