1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/w1/w1_smem.c b/drivers/w1/w1_smem.c
new file mode 100644
index 000000000000..ab82eb7ed74f
--- /dev/null
+++ b/drivers/w1/w1_smem.c
@@ -0,0 +1,118 @@
+/*
+ *      w1_smem.c
+ *
+ * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
+ * 
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the smems 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <asm/types.h>
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/types.h>
+
+#include "w1.h"
+#include "w1_io.h"
+#include "w1_int.h"
+#include "w1_family.h"
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
+MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family.");
+
+static ssize_t w1_smem_read_name(struct device *, char *);
+static ssize_t w1_smem_read_val(struct device *, char *);
+static ssize_t w1_smem_read_bin(struct kobject *, char *, loff_t, size_t);
+
+static struct w1_family_ops w1_smem_fops = {
+        .rname = &w1_smem_read_name,
+        .rbin = &w1_smem_read_bin,
+        .rval = &w1_smem_read_val,
+        .rvalname = "id",
+};
+
+static ssize_t w1_smem_read_name(struct device *dev, char *buf)
+{
+        struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+
+        return sprintf(buf, "%s\n", sl->name);
+}
+
+static ssize_t w1_smem_read_val(struct device *dev, char *buf)
+{
+        struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+        int i;
+        ssize_t count = 0;
+        
+        for (i = 0; i < 9; ++i)
+                count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
+        count += sprintf(buf + count, "\n");
+
+        return count;
+}
+
+static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
+{
+        struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
+                                                struct w1_slave, dev);
+        int i;
+
+        atomic_inc(&sl->refcnt);
+        if (down_interruptible(&sl->master->mutex)) {
+                count = 0;
+                goto out_dec;
+        }
+
+        if (off > W1_SLAVE_DATA_SIZE) {
+                count = 0;
+                goto out;
+        }
+        if (off + count > W1_SLAVE_DATA_SIZE) {
+                count = 0;
+                goto out;
+        }
+        for (i = 0; i < 9; ++i)
+                count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
+        count += sprintf(buf + count, "\n");
+        
+out:
+        up(&sl->master->mutex);
+out_dec:
+        atomic_dec(&sl->refcnt);
+
+        return count;
+}
+
+static struct w1_family w1_smem_family = {
+        .fid = W1_FAMILY_SMEM,
+        .fops = &w1_smem_fops,
+};
+
+static int __init w1_smem_init(void)
+{
+        return w1_register_family(&w1_smem_family);
+}
+
+static void __exit w1_smem_fini(void)
+{
+        w1_unregister_family(&w1_smem_family);
+}
+
+module_init(w1_smem_init);
+module_exit(w1_smem_fini);