memstick: add support for decoding "specfile" media attributes

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/memstick/core/mspro_block.c

@@ -109,6 +109,17 @@ struct mspro_mbr {
 	unsigned int  sectors_per_partition;
 } __attribute__((packed));
 
+struct mspro_specfile {
+	char           name[8];
+	char           ext[3];
+	unsigned char  attr;
+	unsigned char  reserved[10];
+	unsigned short time;
+	unsigned short date;
+	unsigned short cluster;
+	unsigned int   size;
+} __attribute__((packed));
+
 struct mspro_devinfo {
 	unsigned short cylinders;
 	unsigned short heads;
@@ -397,6 +408,41 @@ static ssize_t mspro_block_attr_show_mbr(struct device *dev,
 	return rc;
 }
 
+static ssize_t mspro_block_attr_show_specfile(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buffer)
+{
+	struct mspro_sys_attr *x_attr = container_of(attr,
+						     struct mspro_sys_attr,
+						     dev_attr);
+	struct mspro_specfile *x_spfile = x_attr->data;
+	char name[9], ext[4];
+	ssize_t rc = 0;
+
+	memcpy(name, x_spfile->name, 8);
+	name[8] = 0;
+	memcpy(ext, x_spfile->ext, 3);
+	ext[3] = 0;
+
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "name: %s\n", name);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "ext: %s\n", ext);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "attribute: %x\n",
+			x_spfile->attr);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "time: %d:%d:%d\n",
+			x_spfile->time >> 11,
+			(x_spfile->time >> 5) & 0x3f,
+			(x_spfile->time & 0x1f) * 2);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "date: %d-%d-%d\n",
+			(x_spfile->date >> 9) + 1980,
+			(x_spfile->date >> 5) & 0xf,
+			x_spfile->date & 0x1f);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "start cluster: %x\n",
+			x_spfile->cluster);
+	rc += scnprintf(buffer + rc, PAGE_SIZE - rc, "size: %x\n",
+			x_spfile->size);
+	return rc;
+}
+
 static ssize_t mspro_block_attr_show_devinfo(struct device *dev,
 					     struct device_attribute *attr,
 					     char *buffer)
@@ -429,6 +475,9 @@ static sysfs_show_t mspro_block_attr_show(unsigned char tag)
 		return mspro_block_attr_show_modelname;
 	case MSPRO_BLOCK_ID_MBR:
 		return mspro_block_attr_show_mbr;
+	case MSPRO_BLOCK_ID_SPECFILEVALUES1:
+	case MSPRO_BLOCK_ID_SPECFILEVALUES2:
+		return mspro_block_attr_show_specfile;
 	case MSPRO_BLOCK_ID_DEVINFO:
 		return mspro_block_attr_show_devinfo;
 	default: