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pci.c
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1 /*
2  * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
3  * Copyright (C) 2003 Anton Blanchard <[email protected]>, IBM
4  *
5  * pSeries specific routines for PCI.
6  *
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 
22 #include <linux/init.h>
23 #include <linux/ioport.h>
24 #include <linux/kernel.h>
25 #include <linux/pci.h>
26 #include <linux/string.h>
27 
28 #include <asm/eeh.h>
29 #include <asm/pci-bridge.h>
30 #include <asm/prom.h>
31 #include <asm/ppc-pci.h>
32 
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) {
43  const char *loc_code = of_get_property(dn, "ibm,loc-code", 0);
44  if (loc_code) {
45  int loc_len = strlen(loc_code);
46  if (loc_len < sizeof(dev->dev.name)) {
47  memmove(dev->dev.name+loc_len+1, dev->dev.name,
48  sizeof(dev->dev.name)-loc_len-1);
49  memcpy(dev->dev.name, loc_code, loc_len);
50  dev->dev.name[loc_len] = ' ';
51  dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
52  }
53  }
54  }
55 }
56 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
57 #endif
58 
59 static void __init pSeries_request_regions(void)
60 {
61  if (!isa_io_base)
62  return;
63 
64  request_region(0x20,0x20,"pic1");
65  request_region(0xa0,0x20,"pic2");
66  request_region(0x00,0x20,"dma1");
67  request_region(0x40,0x20,"timer");
68  request_region(0x80,0x10,"dma page reg");
69  request_region(0xc0,0x20,"dma2");
70 }
71 
73 {
74  pSeries_request_regions();
75 
77 }
78 
79 /*
80  * Assume the winbond 82c105 is the IDE controller on a
81  * p610/p615/p630. We should probably be more careful in case
82  * someone tries to plug in a similar adapter.
83  */
84 static void fixup_winbond_82c105(struct pci_dev* dev)
85 {
86  int i;
87  unsigned int reg;
88 
89  if (!machine_is(pseries))
90  return;
91 
92  printk("Using INTC for W82c105 IDE controller.\n");
93  pci_read_config_dword(dev, 0x40, &reg);
94  /* Enable LEGIRQ to use INTC instead of ISA interrupts */
95  pci_write_config_dword(dev, 0x40, reg | (1<<11));
96 
97  for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
98  /* zap the 2nd function of the winbond chip */
99  if (dev->resource[i].flags & IORESOURCE_IO
100  && dev->bus->number == 0 && dev->devfn == 0x81)
101  dev->resource[i].flags &= ~IORESOURCE_IO;
102  if (dev->resource[i].start == 0 && dev->resource[i].end) {
103  dev->resource[i].flags = 0;
104  dev->resource[i].end = 0;
105  }
106  }
107 }
109  fixup_winbond_82c105);