1 /* -*- mode: c; c-basic-offset: 8 -*- */
4 * MCA bus support functions for sysfs.
6 * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com>
8 **-----------------------------------------------------------------------------
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.
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.
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.
24 **-----------------------------------------------------------------------------
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 */
46 static int mca_bus_match (struct device
*dev
, struct device_driver
*drv
)
48 struct mca_device
*mca_dev
= to_mca_device (dev
);
49 struct mca_driver
*mca_drv
= to_mca_driver (drv
);
50 const unsigned short *mca_ids
= mca_drv
->id_table
;
54 for(i
= 0; mca_ids
[i
]; i
++) {
55 if (mca_ids
[i
] == mca_dev
->pos_id
) {
61 /* If the integrated id is present, treat it as though it were an
62 * additional id in the id_table (it can't be because by definition,
63 * integrated id's overflow a short */
64 if (mca_drv
->integrated_id
&& mca_dev
->pos_id
==
65 mca_drv
->integrated_id
) {
72 struct bus_type mca_bus_type
= {
74 .match
= mca_bus_match
,
76 EXPORT_SYMBOL (mca_bus_type
);
78 static ssize_t
mca_show_pos_id(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
80 /* four digits, \n and trailing \0 */
81 struct mca_device
*mca_dev
= to_mca_device(dev
);
84 if(mca_dev
->pos_id
< MCA_DUMMY_POS_START
)
85 len
= sprintf(buf
, "%04x\n", mca_dev
->pos_id
);
87 len
= sprintf(buf
, "none\n");
90 static ssize_t
mca_show_pos(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
92 /* enough for 8 two byte hex chars plus space and new line */
94 struct mca_device
*mca_dev
= to_mca_device(dev
);
97 len
+= sprintf(buf
+len
, "%02x ", mca_dev
->pos
[j
]);
98 /* change last trailing space to new line */
103 static DEVICE_ATTR(id
, S_IRUGO
, mca_show_pos_id
, NULL
);
104 static DEVICE_ATTR(pos
, S_IRUGO
, mca_show_pos
, NULL
);
106 int __init
mca_register_device(int bus
, struct mca_device
*mca_dev
)
108 struct mca_bus
*mca_bus
= mca_root_busses
[bus
];
111 mca_dev
->dev
.parent
= &mca_bus
->dev
;
112 mca_dev
->dev
.bus
= &mca_bus_type
;
113 sprintf (mca_dev
->dev
.bus_id
, "%02d:%02X", bus
, mca_dev
->slot
);
114 mca_dev
->dma_mask
= mca_bus
->default_dma_mask
;
115 mca_dev
->dev
.dma_mask
= &mca_dev
->dma_mask
;
116 mca_dev
->dev
.coherent_dma_mask
= mca_dev
->dma_mask
;
118 rc
= device_register(&mca_dev
->dev
);
122 rc
= device_create_file(&mca_dev
->dev
, &dev_attr_id
);
123 if (rc
) goto err_out_devreg
;
124 rc
= device_create_file(&mca_dev
->dev
, &dev_attr_pos
);
125 if (rc
) goto err_out_id
;
130 device_remove_file(&mca_dev
->dev
, &dev_attr_id
);
132 device_unregister(&mca_dev
->dev
);
138 struct mca_bus
* __devinit
mca_attach_bus(int bus
)
140 struct mca_bus
*mca_bus
;
142 if (unlikely(mca_root_busses
[bus
] != NULL
)) {
143 /* This should never happen, but just in case */
144 printk(KERN_EMERG
"MCA tried to add already existing bus %d\n",
150 mca_bus
= kzalloc(sizeof(struct mca_bus
), GFP_KERNEL
);
154 sprintf(mca_bus
->dev
.bus_id
,"mca%d",bus
);
155 sprintf(mca_bus
->name
,"Host %s MCA Bridge", bus
? "Secondary" : "Primary");
156 if (device_register(&mca_bus
->dev
)) {
161 mca_root_busses
[bus
] = mca_bus
;
166 int __init
mca_system_init (void)
168 return bus_register(&mca_bus_type
);
This page took 0.034965 seconds and 6 git commands to generate.