56 static int hmcdrv_dev_open(struct inode *inode, struct file *fp);
57 static int hmcdrv_dev_release(struct inode *inode, struct file *fp);
58 static loff_t hmcdrv_dev_seek(struct file *fp, loff_t pos, int whence);
59 static ssize_t hmcdrv_dev_read(struct file *fp, char __user *ubuf,
61 static ssize_t hmcdrv_dev_write(struct file *fp, const char __user *ubuf,
114 static int hmcdrv_dev_open(struct inode *inode, struct file *fp)  in hmcdrv_dev_open()  argument
120 	if (fp->f_flags & O_NONBLOCK)  in hmcdrv_dev_open()
126 	if ((fp->f_flags & O_ACCMODE) == O_RDONLY)  in hmcdrv_dev_open()
135 	fp->private_data = NULL; /* no command yet */  in hmcdrv_dev_open()
140 	pr_debug("open file '/dev/%pD' with return code %d\n", fp, rc);  in hmcdrv_dev_open()
147 static int hmcdrv_dev_release(struct inode *inode, struct file *fp)  in hmcdrv_dev_release()  argument
149 	pr_debug("closing file '/dev/%pD'\n", fp);  in hmcdrv_dev_release()
150 	kfree(fp->private_data);  in hmcdrv_dev_release()
151 	fp->private_data = NULL;  in hmcdrv_dev_release()
160 static loff_t hmcdrv_dev_seek(struct file *fp, loff_t pos, int whence)  in hmcdrv_dev_seek()  argument
164 		pos += fp->f_pos; /* new position stored in 'pos' */  in hmcdrv_dev_seek()
175 		if (fp->private_data) {  in hmcdrv_dev_seek()
176 			kfree(fp->private_data);  in hmcdrv_dev_seek()
177 			fp->private_data = NULL;  in hmcdrv_dev_seek()
189 	if (fp->f_pos != pos)  in hmcdrv_dev_seek()
190 		++fp->f_version;  in hmcdrv_dev_seek()
192 	fp->f_pos = pos;  in hmcdrv_dev_seek()
221 static ssize_t hmcdrv_dev_read(struct file *fp, char __user *ubuf,  in hmcdrv_dev_read()  argument
226 	if (((fp->f_flags & O_ACCMODE) == O_WRONLY) ||  in hmcdrv_dev_read()
227 	    (fp->private_data == NULL)) { /* no FTP cmd defined ? */  in hmcdrv_dev_read()
231 	retlen = hmcdrv_dev_transfer((char *) fp->private_data,  in hmcdrv_dev_read()
235 		 fp, (long long) *pos, retlen, len);  in hmcdrv_dev_read()
246 static ssize_t hmcdrv_dev_write(struct file *fp, const char __user *ubuf,  in hmcdrv_dev_write()  argument
252 		 fp, (long long) *pos, len);  in hmcdrv_dev_write()
254 	if (!fp->private_data) { /* first expect a cmd write */  in hmcdrv_dev_write()
255 		fp->private_data = kmalloc(len + 1, GFP_KERNEL);  in hmcdrv_dev_write()
257 		if (!fp->private_data)  in hmcdrv_dev_write()
260 		if (!copy_from_user(fp->private_data, ubuf, len)) {  in hmcdrv_dev_write()
261 			((char *)fp->private_data)[len] = '\0';  in hmcdrv_dev_write()
265 		kfree(fp->private_data);  in hmcdrv_dev_write()
266 		fp->private_data = NULL;  in hmcdrv_dev_write()
270 	retlen = hmcdrv_dev_transfer((char *) fp->private_data,  in hmcdrv_dev_write()
275 	pr_debug("write to file '/dev/%pD' returned %zd\n", fp, retlen);  in hmcdrv_dev_write()