1 files changed, 149 insertions, 0 deletions

diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
new file mode 100644
index 000000000000..ff9be67c2a15
--- /dev/null
+++ b/drivers/mca/mca-bus.c
@@ -0,0 +1,149 @@
+/* -*- mode: c; c-basic-offset: 8 -*- */
+
+/*
+ * MCA bus support functions for sysfs.
+ *
+ * (C) 2002 James Bottomley <James.Bottomley@HansenPartnership.com>
+ *
+**-----------------------------------------------------------------------------
+**  
+**  This program is free software; you can redistribute it and/or modify
+**  it under the terms of the GNU General Public License as published by
+**  the Free Software Foundation; either version 2 of the License, or
+**  (at your option) any later version.
+**
+**  This program is distributed in the hope that it will be useful,
+**  but WITHOUT ANY WARRANTY; without even the implied warranty of
+**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**  GNU General Public License for more details.
+**
+**  You should have received a copy of the GNU General Public License
+**  along with this program; if not, write to the Free Software
+**  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+**
+**-----------------------------------------------------------------------------
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/mca.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+
+/* Very few machines have more than one MCA bus.  However, there are
+ * those that do (Voyager 35xx/5xxx), so we do it this way for future
+ * expansion.  None that I know have more than 2 */
+static struct mca_bus *mca_root_busses[MAX_MCA_BUSSES];
+
+#define MCA_DEVINFO(i,s) { .pos = i, .name = s }
+
+struct mca_device_info {
+        short pos_id;           /* the 2 byte pos id for this card */
+        char name[DEVICE_NAME_SIZE];
+};
+
+static int mca_bus_match (struct device *dev, struct device_driver *drv)
+{
+        struct mca_device *mca_dev = to_mca_device (dev);
+        struct mca_driver *mca_drv = to_mca_driver (drv);
+        const short *mca_ids = mca_drv->id_table;
+        int i;
+
+        if (!mca_ids)
+                return 0;
+
+        for(i = 0; mca_ids[i]; i++) {
+                if (mca_ids[i] == mca_dev->pos_id) {
+                        mca_dev->index = i;
+                        return 1;
+                }
+        }
+
+        return 0;
+}
+
+struct bus_type mca_bus_type = {
+        .name  = "MCA",
+        .match = mca_bus_match,
+};
+EXPORT_SYMBOL (mca_bus_type);
+
+static ssize_t mca_show_pos_id(struct device *dev, char *buf)
+{
+        /* four digits, \n and trailing \0 */
+        struct mca_device *mca_dev = to_mca_device(dev);
+        int len;
+
+        if(mca_dev->pos_id < MCA_DUMMY_POS_START)
+                len = sprintf(buf, "%04x\n", mca_dev->pos_id);
+        else
+                len = sprintf(buf, "none\n");
+        return len;
+}
+static ssize_t mca_show_pos(struct device *dev, char *buf)
+{
+        /* enough for 8 two byte hex chars plus space and new line */
+        int j, len=0;
+        struct mca_device *mca_dev = to_mca_device(dev);
+
+        for(j=0; j<8; j++)
+                len += sprintf(buf+len, "%02x ", mca_dev->pos[j]);
+        /* change last trailing space to new line */
+        buf[len-1] = '\n';
+        return len;
+}
+
+static DEVICE_ATTR(id, S_IRUGO, mca_show_pos_id, NULL);
+static DEVICE_ATTR(pos, S_IRUGO, mca_show_pos, NULL);
+
+int __init mca_register_device(int bus, struct mca_device *mca_dev)
+{
+        struct mca_bus *mca_bus = mca_root_busses[bus];
+
+        mca_dev->dev.parent = &mca_bus->dev;
+        mca_dev->dev.bus = &mca_bus_type;
+        sprintf (mca_dev->dev.bus_id, "%02d:%02X", bus, mca_dev->slot);
+        mca_dev->dma_mask = mca_bus->default_dma_mask;
+        mca_dev->dev.dma_mask = &mca_dev->dma_mask;
+        mca_dev->dev.coherent_dma_mask = mca_dev->dma_mask;
+
+        if (device_register(&mca_dev->dev))
+                return 0;
+
+        device_create_file(&mca_dev->dev, &dev_attr_id);
+        device_create_file(&mca_dev->dev, &dev_attr_pos);
+
+        return 1;
+}
+
+/* */
+struct mca_bus * __devinit mca_attach_bus(int bus)
+{
+        struct mca_bus *mca_bus;
+
+        if (unlikely(mca_root_busses[bus] != NULL)) {
+                /* This should never happen, but just in case */
+                printk(KERN_EMERG "MCA tried to add already existing bus %d\n",
+                       bus);
+                dump_stack();
+                return NULL;
+        }
+
+        mca_bus = kmalloc(sizeof(struct mca_bus), GFP_KERNEL);
+        if (!mca_bus)
+                return NULL;
+        memset(mca_bus, 0, sizeof(struct mca_bus));
+        sprintf(mca_bus->dev.bus_id,"mca%d",bus);
+        sprintf(mca_bus->name,"Host %s MCA Bridge", bus ? "Secondary" : "Primary");
+        device_register(&mca_bus->dev);
+
+        mca_root_busses[bus] = mca_bus;
+
+        return mca_bus;
+}
+
+int __init mca_system_init (void)
+{
+        return bus_register(&mca_bus_type);
+}