/*
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/*
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* linux/arch/arm/drivers/char/mouse.c
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* linux/arch/arm/drivers/char/mouse.c
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*
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*
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* Generic misc open routine by Johan Myreen
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* Generic misc open routine by Johan Myreen
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*
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*
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* Based on code from Linus
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* Based on code from Linus
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*
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*
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* Teemu Rantanen's Microsoft Busmouse support and Derrick Cole's
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* Teemu Rantanen's Microsoft Busmouse support and Derrick Cole's
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* changes incorporated into 0.97pl4
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* changes incorporated into 0.97pl4
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* by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92)
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* by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92)
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* See busmouse.c for particulars.
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* See busmouse.c for particulars.
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*
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*
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* Made things a lot mode modular - easy to compile in just one or two
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* Made things a lot mode modular - easy to compile in just one or two
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* of the misc drivers, as they are now completely independent. Linus.
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* of the misc drivers, as they are now completely independent. Linus.
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*
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*
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* Support for loadable modules. 8-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
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* Support for loadable modules. 8-Sep-95 Philip Blundell <pjb27@cam.ac.uk>
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*
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*
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* Fixed a failing symbol register to free the device registration
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* Fixed a failing symbol register to free the device registration
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* Alan Cox <alan@lxorguk.ukuu.org.uk> 21-Jan-96
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* Alan Cox <alan@lxorguk.ukuu.org.uk> 21-Jan-96
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*
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*
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* Dynamic minors and /proc/mice by Alessandro Rubini. 26-Mar-96
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* Dynamic minors and /proc/mice by Alessandro Rubini. 26-Mar-96
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*
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*
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* Renamed to misc and miscdevice to be more accurate. Alan Cox 26-Mar-96
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* Renamed to misc and miscdevice to be more accurate. Alan Cox 26-Mar-96
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*
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*
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* Handling of mouse minor numbers for kerneld:
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* Handling of mouse minor numbers for kerneld:
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* Idea by Jacques Gelinas <jack@solucorp.qc.ca>,
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* Idea by Jacques Gelinas <jack@solucorp.qc.ca>,
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* adapted by Bjorn Ekwall <bj0rn@blox.se>
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* adapted by Bjorn Ekwall <bj0rn@blox.se>
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* corrected by Alan Cox <alan@lxorguk.ukuu.org.uk>
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* corrected by Alan Cox <alan@lxorguk.ukuu.org.uk>
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*/
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*/
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/fs.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/miscdevice.h>
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#include <linux/miscdevice.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/major.h>
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#include <linux/malloc.h>
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#include <linux/malloc.h>
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#include <linux/proc_fs.h>
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#include <linux/proc_fs.h>
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#include <linux/stat.h>
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#include <linux/stat.h>
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#include <linux/tty.h> /* needed by selection.h */
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#include <linux/tty.h> /* needed by selection.h */
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#include "vt_kern.h"
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#include "vt_kern.h"
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#include "selection.h" /* export its symbols */
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#include "selection.h" /* export its symbols */
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#ifdef CONFIG_KERNELD
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#ifdef CONFIG_KERNELD
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#include <linux/kerneld.h>
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#include <linux/kerneld.h>
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#endif
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#endif
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#include "mouse.h"
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#include "mouse.h"
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/*
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/*
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* Head entry for the doubly linked miscdevice list
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* Head entry for the doubly linked miscdevice list
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*/
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*/
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static struct miscdevice misc_list = { 0, "head", NULL, &misc_list, &misc_list };
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static struct miscdevice misc_list = { 0, "head", NULL, &misc_list, &misc_list };
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/*
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/*
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* Assigned numbers, used for dynamic minors
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* Assigned numbers, used for dynamic minors
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*/
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*/
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#define DYNAMIC_MINORS 64 /* like dynamic majors used to do */
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#define DYNAMIC_MINORS 64 /* like dynamic majors used to do */
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static unsigned char misc_minors[DYNAMIC_MINORS / 8];
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static unsigned char misc_minors[DYNAMIC_MINORS / 8];
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#ifndef MODULE
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#ifndef MODULE
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extern void watchdog_init(void);
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extern void watchdog_init(void);
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extern int arch_mouse_init(void);
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extern int arch_mouse_init(void);
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extern int con_get_info(int *mode, int *shift, int *col, int *row,
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extern int con_get_info(int *mode, int *shift, int *col, int *row,
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struct tty_struct **tty);
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struct tty_struct **tty);
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#ifdef CONFIG_PROC_FS
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#ifdef CONFIG_PROC_FS
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static int proc_misc_read(char *buf, char **start, off_t offset, int len, int unused)
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static int proc_misc_read(char *buf, char **start, off_t offset, int len, int unused)
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{
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{
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struct miscdevice *p;
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struct miscdevice *p;
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len=0;
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len=0;
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for (p = misc_list.next; p != &misc_list; p = p->next)
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for (p = misc_list.next; p != &misc_list; p = p->next)
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len += sprintf(buf+len, "%3i %s\n",p->minor, p->name ?: "");
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len += sprintf(buf+len, "%3i %s\n",p->minor, p->name ?: "");
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return len;
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return len;
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}
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}
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#endif /* PROC_FS */
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#endif /* PROC_FS */
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#endif /* !MODULE */
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#endif /* !MODULE */
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static int misc_open(struct inode * inode, struct file * file)
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static int misc_open(struct inode * inode, struct file * file)
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{
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{
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int minor = MINOR(inode->i_rdev);
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int minor = MINOR(inode->i_rdev);
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struct miscdevice *c = misc_list.next;
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struct miscdevice *c = misc_list.next;
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file->f_op = NULL;
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file->f_op = NULL;
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while ((c != &misc_list) && (c->minor != minor))
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while ((c != &misc_list) && (c->minor != minor))
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c = c->next;
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c = c->next;
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if (c == &misc_list) {
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if (c == &misc_list) {
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#ifdef CONFIG_KERNELD
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#ifdef CONFIG_KERNELD
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char modname[20];
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char modname[20];
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sprintf(modname, "char-major-%d-%d", MISC_MAJOR, minor);
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sprintf(modname, "char-major-%d-%d", MISC_MAJOR, minor);
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request_module(modname);
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request_module(modname);
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c = misc_list.next;
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c = misc_list.next;
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while ((c != &misc_list) && (c->minor != minor))
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while ((c != &misc_list) && (c->minor != minor))
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c = c->next;
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c = c->next;
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if (c == &misc_list)
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if (c == &misc_list)
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#endif
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#endif
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return -ENODEV;
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return -ENODEV;
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}
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}
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if ((file->f_op = c->fops))
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if ((file->f_op = c->fops))
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return file->f_op->open(inode,file);
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return file->f_op->open(inode,file);
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else
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else
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return -ENODEV;
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return -ENODEV;
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}
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}
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static struct file_operations misc_fops = {
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static struct file_operations misc_fops = {
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NULL, /* seek */
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NULL, /* seek */
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NULL, /* read */
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NULL, /* read */
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NULL, /* write */
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NULL, /* write */
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NULL, /* readdir */
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NULL, /* readdir */
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NULL, /* select */
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NULL, /* select */
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NULL, /* ioctl */
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NULL, /* ioctl */
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NULL, /* mmap */
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NULL, /* mmap */
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misc_open,
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misc_open,
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NULL /* release */
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NULL /* release */
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};
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};
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int misc_register(struct miscdevice * misc)
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int misc_register(struct miscdevice * misc)
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{
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{
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if (misc->next || misc->prev)
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if (misc->next || misc->prev)
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return -EBUSY;
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return -EBUSY;
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if (misc->minor == MISC_DYNAMIC_MINOR) {
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if (misc->minor == MISC_DYNAMIC_MINOR) {
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int i = DYNAMIC_MINORS;
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int i = DYNAMIC_MINORS;
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while (--i >= 0)
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while (--i >= 0)
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if ( (misc_minors[i>>3] & (1 << (i&7))) == 0)
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if ( (misc_minors[i>>3] & (1 << (i&7))) == 0)
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break;
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break;
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if (i<0) return -EBUSY;
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if (i<0) return -EBUSY;
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misc->minor = i;
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misc->minor = i;
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}
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}
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if (misc->minor < DYNAMIC_MINORS)
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if (misc->minor < DYNAMIC_MINORS)
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misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
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misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
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MOD_INC_USE_COUNT;
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MOD_INC_USE_COUNT;
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misc->next = &misc_list;
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misc->next = &misc_list;
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misc->prev = misc_list.prev;
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misc->prev = misc_list.prev;
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misc->prev->next = misc;
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misc->prev->next = misc;
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misc->next->prev = misc;
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misc->next->prev = misc;
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return 0;
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return 0;
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}
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}
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int misc_deregister(struct miscdevice * misc)
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int misc_deregister(struct miscdevice * misc)
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{
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{
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int i = misc->minor;
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int i = misc->minor;
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if (!misc->next || !misc->prev)
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if (!misc->next || !misc->prev)
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return -EINVAL;
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return -EINVAL;
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MOD_DEC_USE_COUNT;
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MOD_DEC_USE_COUNT;
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misc->prev->next = misc->next;
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misc->prev->next = misc->next;
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misc->next->prev = misc->prev;
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misc->next->prev = misc->prev;
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misc->next = NULL;
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misc->next = NULL;
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misc->prev = NULL;
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misc->prev = NULL;
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if (i < DYNAMIC_MINORS && i>0) {
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if (i < DYNAMIC_MINORS && i>0) {
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misc_minors[i>>3] &= ~(1 << (misc->minor & 7));
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misc_minors[i>>3] &= ~(1 << (misc->minor & 7));
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}
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}
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return 0;
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return 0;
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}
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}
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#ifdef MODULE
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#ifdef MODULE
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#define misc_init init_module
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#define misc_init init_module
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void cleanup_module(void)
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void cleanup_module(void)
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{
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{
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unregister_chrdev(MISC_MAJOR, "misc");
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unregister_chrdev(MISC_MAJOR, "misc");
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}
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}
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#endif
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#endif
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static struct symbol_table misc_syms = {
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static struct symbol_table misc_syms = {
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/* Should this be surrounded with "#ifdef CONFIG_MODULES" ? */
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/* Should this be surrounded with "#ifdef CONFIG_MODULES" ? */
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#include <linux/symtab_begin.h>
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#include <linux/symtab_begin.h>
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X(misc_register),
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X(misc_register),
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X(misc_deregister),
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X(misc_deregister),
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#ifndef MODULE
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#ifndef MODULE
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X(set_selection), /* used by the kmouse module, can only */
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X(set_selection), /* used by the kmouse module, can only */
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X(paste_selection), /* be exported if misc.c is in linked in */
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X(paste_selection), /* be exported if misc.c is in linked in */
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X(con_get_info),
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X(con_get_info),
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#endif
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#endif
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#include <linux/symtab_end.h>
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#include <linux/symtab_end.h>
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};
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};
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int misc_init(void)
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int misc_init(void)
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{
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{
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#ifndef MODULE
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#ifndef MODULE
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#ifdef CONFIG_PROC_FS
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#ifdef CONFIG_PROC_FS
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proc_register_dynamic(&proc_root, &(struct proc_dir_entry) {
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proc_register_dynamic(&proc_root, &(struct proc_dir_entry) {
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0, 4, "misc",
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0, 4, "misc",
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S_IFREG | S_IRUGO, 1, 0, 0,
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S_IFREG | S_IRUGO, 1, 0, 0,
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0, NULL /* ops -- default to array */,
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0, NULL /* ops -- default to array */,
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&proc_misc_read /* get_info */,
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&proc_misc_read /* get_info */,
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});
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});
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#endif /* PROC_FS */
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#endif /* PROC_FS */
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#ifdef CONFIG_MOUSE
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#ifdef CONFIG_MOUSE
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misc_mouse_init();
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misc_mouse_init();
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#endif
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#endif
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#ifdef CONFIG_SOFT_WATCHDOG
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#ifdef CONFIG_SOFT_WATCHDOG
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watchdog_init();
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watchdog_init();
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#endif
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#endif
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#endif /* !MODULE */
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#endif /* !MODULE */
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if (register_chrdev(MISC_MAJOR,"misc",&misc_fops)) {
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if (register_chrdev(MISC_MAJOR,"misc",&misc_fops)) {
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printk("unable to get major %d for misc devices\n",
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printk("unable to get major %d for misc devices\n",
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MISC_MAJOR);
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MISC_MAJOR);
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return -EIO;
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return -EIO;
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}
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}
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if(register_symtab(&misc_syms)!=0)
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if(register_symtab(&misc_syms)!=0)
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{
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{
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unregister_chrdev(MISC_MAJOR, "misc");
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unregister_chrdev(MISC_MAJOR, "misc");
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return -EIO;
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return -EIO;
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}
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}
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return 0;
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return 0;
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}
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}
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