ia64/linux-2.6.18-xen.hg

view drivers/mca/mca-bus.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 /* -*- mode: c; c-basic-offset: 8 -*- */
3 /*
4 * MCA bus support functions for sysfs.
5 *
6 * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com>
7 *
8 **-----------------------------------------------------------------------------
9 **
10 ** This program is free software; you can redistribute it and/or modify
11 ** it under the terms of the GNU General Public License as published by
12 ** the Free Software Foundation; either version 2 of the License, or
13 ** (at your option) any later version.
14 **
15 ** This program is distributed in the hope that it will be useful,
16 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ** GNU General Public License for more details.
19 **
20 ** You should have received a copy of the GNU General Public License
21 ** along with this program; if not, write to the Free Software
22 ** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 **
24 **-----------------------------------------------------------------------------
25 */
27 #include <linux/kernel.h>
28 #include <linux/device.h>
29 #include <linux/mca.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
34 /* Very few machines have more than one MCA bus. However, there are
35 * those that do (Voyager 35xx/5xxx), so we do it this way for future
36 * expansion. None that I know have more than 2 */
37 static struct mca_bus *mca_root_busses[MAX_MCA_BUSSES];
39 #define MCA_DEVINFO(i,s) { .pos = i, .name = s }
41 struct mca_device_info {
42 short pos_id; /* the 2 byte pos id for this card */
43 char name[DEVICE_NAME_SIZE];
44 };
46 static int mca_bus_match (struct device *dev, struct device_driver *drv)
47 {
48 struct mca_device *mca_dev = to_mca_device (dev);
49 struct mca_driver *mca_drv = to_mca_driver (drv);
50 const short *mca_ids = mca_drv->id_table;
51 int i;
53 if (!mca_ids)
54 return 0;
56 for(i = 0; mca_ids[i]; i++) {
57 if (mca_ids[i] == mca_dev->pos_id) {
58 mca_dev->index = i;
59 return 1;
60 }
61 }
63 return 0;
64 }
66 struct bus_type mca_bus_type = {
67 .name = "MCA",
68 .match = mca_bus_match,
69 };
70 EXPORT_SYMBOL (mca_bus_type);
72 static ssize_t mca_show_pos_id(struct device *dev, struct device_attribute *attr, char *buf)
73 {
74 /* four digits, \n and trailing \0 */
75 struct mca_device *mca_dev = to_mca_device(dev);
76 int len;
78 if(mca_dev->pos_id < MCA_DUMMY_POS_START)
79 len = sprintf(buf, "%04x\n", mca_dev->pos_id);
80 else
81 len = sprintf(buf, "none\n");
82 return len;
83 }
84 static ssize_t mca_show_pos(struct device *dev, struct device_attribute *attr, char *buf)
85 {
86 /* enough for 8 two byte hex chars plus space and new line */
87 int j, len=0;
88 struct mca_device *mca_dev = to_mca_device(dev);
90 for(j=0; j<8; j++)
91 len += sprintf(buf+len, "%02x ", mca_dev->pos[j]);
92 /* change last trailing space to new line */
93 buf[len-1] = '\n';
94 return len;
95 }
97 static DEVICE_ATTR(id, S_IRUGO, mca_show_pos_id, NULL);
98 static DEVICE_ATTR(pos, S_IRUGO, mca_show_pos, NULL);
100 int __init mca_register_device(int bus, struct mca_device *mca_dev)
101 {
102 struct mca_bus *mca_bus = mca_root_busses[bus];
104 mca_dev->dev.parent = &mca_bus->dev;
105 mca_dev->dev.bus = &mca_bus_type;
106 sprintf (mca_dev->dev.bus_id, "%02d:%02X", bus, mca_dev->slot);
107 mca_dev->dma_mask = mca_bus->default_dma_mask;
108 mca_dev->dev.dma_mask = &mca_dev->dma_mask;
109 mca_dev->dev.coherent_dma_mask = mca_dev->dma_mask;
111 if (device_register(&mca_dev->dev))
112 return 0;
114 device_create_file(&mca_dev->dev, &dev_attr_id);
115 device_create_file(&mca_dev->dev, &dev_attr_pos);
117 return 1;
118 }
120 /* */
121 struct mca_bus * __devinit mca_attach_bus(int bus)
122 {
123 struct mca_bus *mca_bus;
125 if (unlikely(mca_root_busses[bus] != NULL)) {
126 /* This should never happen, but just in case */
127 printk(KERN_EMERG "MCA tried to add already existing bus %d\n",
128 bus);
129 dump_stack();
130 return NULL;
131 }
133 mca_bus = kmalloc(sizeof(struct mca_bus), GFP_KERNEL);
134 if (!mca_bus)
135 return NULL;
136 memset(mca_bus, 0, sizeof(struct mca_bus));
137 sprintf(mca_bus->dev.bus_id,"mca%d",bus);
138 sprintf(mca_bus->name,"Host %s MCA Bridge", bus ? "Secondary" : "Primary");
139 device_register(&mca_bus->dev);
141 mca_root_busses[bus] = mca_bus;
143 return mca_bus;
144 }
146 int __init mca_system_init (void)
147 {
148 return bus_register(&mca_bus_type);
149 }