drivers/parport/procfs.c - kernel/msm-4.9 - Gitiles

 /* Sysctl interface for parport devices.
  *
  * Authors: David Campbell
  *          Tim Waugh <tim@cyberelk.demon.co.uk>
  *          Philip Blundell <philb@gnu.org>
  *          Andrea Arcangeli
  *          Riccardo Facchetti <fizban@tin.it>
  *
  * based on work by Grant Guenther <grant@torque.net>
  *              and Philip Blundell
  *
  * Cleaned up include files - Russell King <linux@arm.uk.linux.org>
  */

 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/parport.h>
 #include <linux/ctype.h>
 #include <linux/sysctl.h>

 #include <asm/uaccess.h>

 #if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)

 #define PARPORT_MIN_TIMESLICE_VALUE 1ul
 #define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
 #define PARPORT_MIN_SPINTIME_VALUE 1
 #define PARPORT_MAX_SPINTIME_VALUE 1000

 static int do_active_device(ctl_table *table, int write, struct file *filp,
 		      void __user *result, size_t *lenp, loff_t *ppos)
 {
 	struct parport *port = (struct parport *)table->extra1;
 	char buffer[256];
 	struct pardevice *dev;
 	int len = 0;

 	if (write)		/* can't happen anyway */
 		return -EACCES;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	for (dev = port->devices; dev ; dev = dev->next) {
 		if(dev == port->cad) {
 			len += sprintf(buffer, "%s\n", dev->name);
 		}
 	}

 	if(!len) {
 		len += sprintf(buffer, "%s\n", "none");
 	}

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
 }

 #ifdef CONFIG_PARPORT_1284
 static int do_autoprobe(ctl_table *table, int write, struct file *filp,
 			void __user *result, size_t *lenp, loff_t *ppos)
 {
 	struct parport_device_info *info = table->extra2;
 	const char *str;
 	char buffer[256];
 	int len = 0;

 	if (write) /* permissions stop this */
 		return -EACCES;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	if ((str = info->class_name) != NULL)
 		len += sprintf (buffer + len, "CLASS:%s;\n", str);

 	if ((str = info->model) != NULL)
 		len += sprintf (buffer + len, "MODEL:%s;\n", str);

 	if ((str = info->mfr) != NULL)
 		len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);

 	if ((str = info->description) != NULL)
 		len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);

 	if ((str = info->cmdset) != NULL)
 		len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user (result, buffer, len) ? -EFAULT : 0;
 }
 #endif /* IEEE1284.3 support. */

 static int do_hardware_base_addr (ctl_table *table, int write,
 				  struct file *filp, void __user *result,
 				  size_t *lenp, loff_t *ppos)
 {
 	struct parport *port = (struct parport *)table->extra1;
 	char buffer[20];
 	int len = 0;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	if (write) /* permissions prevent this anyway */
 		return -EACCES;

 	len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
 }

 static int do_hardware_irq (ctl_table *table, int write,
 			    struct file *filp, void __user *result,
 			    size_t *lenp, loff_t *ppos)
 {
 	struct parport *port = (struct parport *)table->extra1;
 	char buffer[20];
 	int len = 0;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	if (write) /* permissions prevent this anyway */
 		return -EACCES;

 	len += sprintf (buffer, "%d\n", port->irq);

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
 }

 static int do_hardware_dma (ctl_table *table, int write,
 			    struct file *filp, void __user *result,
 			    size_t *lenp, loff_t *ppos)
 {
 	struct parport *port = (struct parport *)table->extra1;
 	char buffer[20];
 	int len = 0;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	if (write) /* permissions prevent this anyway */
 		return -EACCES;

 	len += sprintf (buffer, "%d\n", port->dma);

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
 }

 static int do_hardware_modes (ctl_table *table, int write,
 			      struct file *filp, void __user *result,
 			      size_t *lenp, loff_t *ppos)
 {
 	struct parport *port = (struct parport *)table->extra1;
 	char buffer[40];
 	int len = 0;

 	if (*ppos) {
 		*lenp = 0;
 		return 0;
 	}

 	if (write) /* permissions prevent this anyway */
 		return -EACCES;

 	{
 #define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
 		int f = 0;
 		printmode(PCSPP);
 		printmode(TRISTATE);
 		printmode(COMPAT);
 		printmode(EPP);
 		printmode(ECP);
 		printmode(DMA);
 #undef printmode
 	}
 	buffer[len++] = '\n';

 	if (len > *lenp)
 		len = *lenp;
 	else
 		*lenp = len;

 	*ppos += len;

 	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
 }

 #define PARPORT_PORT_DIR(CHILD) { .ctl_name = 0, .procname = NULL, .mode = 0555, .child = CHILD }
 #define PARPORT_PARPORT_DIR(CHILD) { .ctl_name = DEV_PARPORT, .procname = "parport", \
                                      .mode = 0555, .child = CHILD }
 #define PARPORT_DEV_DIR(CHILD) { .ctl_name = CTL_DEV, .procname = "dev", .mode = 0555, .child = CHILD }
 #define PARPORT_DEVICES_ROOT_DIR  {  .procname = "devices", \
                                     .mode = 0555, .child = NULL }

 static const unsigned long parport_min_timeslice_value =
 PARPORT_MIN_TIMESLICE_VALUE;

 static const unsigned long parport_max_timeslice_value =
 PARPORT_MAX_TIMESLICE_VALUE;

 static const  int parport_min_spintime_value =
 PARPORT_MIN_SPINTIME_VALUE;

 static const int parport_max_spintime_value =
 PARPORT_MAX_SPINTIME_VALUE;


 struct parport_sysctl_table {
 	struct ctl_table_header *sysctl_header;
 	ctl_table vars[12];
 	ctl_table device_dir[2];
 	ctl_table port_dir[2];
 	ctl_table parport_dir[2];
 	ctl_table dev_dir[2];
 };

 static const struct parport_sysctl_table parport_sysctl_template = {
 	.sysctl_header = NULL,
         {
 		{
 			.procname	= "spintime",
 			.data		= NULL,
 			.maxlen		= sizeof(int),
 			.mode		= 0644,
 			.proc_handler	= &proc_dointvec_minmax,
 			.extra1		= (void*) &parport_min_spintime_value,
 			.extra2		= (void*) &parport_max_spintime_value
 		},
 		{
 			.procname	= "base-addr",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_hardware_base_addr
 		},
 		{
 			.procname	= "irq",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_hardware_irq
 		},
 		{
 			.procname	= "dma",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_hardware_dma
 		},
 		{
 			.procname	= "modes",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_hardware_modes
 		},
 		PARPORT_DEVICES_ROOT_DIR,
 #ifdef CONFIG_PARPORT_1284
 		{
 			.procname	= "autoprobe",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_autoprobe
 		},
 		{
 			.procname	= "autoprobe0",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	=  &do_autoprobe
 		},
 		{
 			.procname	= "autoprobe1",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_autoprobe
 		},
 		{
 			.procname	= "autoprobe2",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_autoprobe
 		},
 		{
 			.procname	= "autoprobe3",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_autoprobe
 		},
 #endif /* IEEE 1284 support */
 		{}
 	},
 	{
 		{
 			.procname	= "active",
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0444,
 			.proc_handler	= &do_active_device
 		},
 		{}
 	},
 	{
 		PARPORT_PORT_DIR(NULL),
 		{}
 	},
 	{
 		PARPORT_PARPORT_DIR(NULL),
 		{}
 	},
 	{
 		PARPORT_DEV_DIR(NULL),
 		{}
 	}
 };

 struct parport_device_sysctl_table
 {
 	struct ctl_table_header *sysctl_header;
 	ctl_table vars[2];
 	ctl_table device_dir[2];
 	ctl_table devices_root_dir[2];
 	ctl_table port_dir[2];
 	ctl_table parport_dir[2];
 	ctl_table dev_dir[2];
 };

 static const struct parport_device_sysctl_table
 parport_device_sysctl_template = {
 	.sysctl_header = NULL,
 	{
 		{
 			.procname 	= "timeslice",
 			.data		= NULL,
 			.maxlen		= sizeof(int),
 			.mode		= 0644,
 			.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
 			.extra1		= (void*) &parport_min_timeslice_value,
 			.extra2		= (void*) &parport_max_timeslice_value
 		},
 	},
 	{
 		{
 			.ctl_name	= 0,
 			.procname	= NULL,
 			.data		= NULL,
 			.maxlen		= 0,
 			.mode		= 0555,
 			.child		= NULL
 		},
 		{}
 	},
 	{
 		PARPORT_DEVICES_ROOT_DIR,
 		{}
 	},
 	{
 		PARPORT_PORT_DIR(NULL),
 		{}
 	},
 	{
 		PARPORT_PARPORT_DIR(NULL),
 		{}
 	},
 	{
 		PARPORT_DEV_DIR(NULL),
 		{}
 	}
 };

 struct parport_default_sysctl_table
 {
 	struct ctl_table_header *sysctl_header;
 	ctl_table vars[3];
         ctl_table default_dir[2];
 	ctl_table parport_dir[2];
 	ctl_table dev_dir[2];
 };

 extern unsigned long parport_default_timeslice;
 extern int parport_default_spintime;

 static struct parport_default_sysctl_table
 parport_default_sysctl_table = {
 	.sysctl_header	= NULL,
 	{
 		{
 			.procname	= "timeslice",
 			.data		= &parport_default_timeslice,
 			.maxlen		= sizeof(parport_default_timeslice),
 			.mode		= 0644,
 			.proc_handler	= &proc_doulongvec_ms_jiffies_minmax,
 			.extra1		= (void*) &parport_min_timeslice_value,
 			.extra2		= (void*) &parport_max_timeslice_value
 		},
 		{
 			.procname	= "spintime",
 			.data		= &parport_default_spintime,
 			.maxlen		= sizeof(parport_default_spintime),
 			.mode		= 0644,
 			.proc_handler	= &proc_dointvec_minmax,
 			.extra1		= (void*) &parport_min_spintime_value,
 			.extra2		= (void*) &parport_max_spintime_value
 		},
 		{}
 	},
 	{
 		{
 			.ctl_name	= DEV_PARPORT_DEFAULT,
 			.procname	= "default",
 			.mode		= 0555,
 			.child		= parport_default_sysctl_table.vars
 		},
 		{}
 	},
 	{
 		PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
 		{}
 	},
 	{
 		PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
 		{}
 	}
 };


 int parport_proc_register(struct parport *port)
 {
 	struct parport_sysctl_table *t;
 	int i;

 	t = kmalloc(sizeof(*t), GFP_KERNEL);
 	if (t == NULL)
 		return -ENOMEM;
 	memcpy(t, &parport_sysctl_template, sizeof(*t));

 	t->device_dir[0].extra1 = port;

 	for (i = 0; i < 5; i++)
 		t->vars[i].extra1 = port;

 	t->vars[0].data = &port->spintime;
 	t->vars[5].child = t->device_dir;

 	for (i = 0; i < 5; i++)
 		t->vars[6 + i].extra2 = &port->probe_info[i];

 	t->port_dir[0].procname = port->name;
 	t->port_dir[0].ctl_name = 0;

 	t->port_dir[0].child = t->vars;
 	t->parport_dir[0].child = t->port_dir;
 	t->dev_dir[0].child = t->parport_dir;

 	t->sysctl_header = register_sysctl_table(t->dev_dir);
 	if (t->sysctl_header == NULL) {
 		kfree(t);
 		t = NULL;
 	}
 	port->sysctl_table = t;
 	return 0;
 }

 int parport_proc_unregister(struct parport *port)
 {
 	if (port->sysctl_table) {
 		struct parport_sysctl_table *t = port->sysctl_table;
 		port->sysctl_table = NULL;
 		unregister_sysctl_table(t->sysctl_header);
 		kfree(t);
 	}
 	return 0;
 }

 int parport_device_proc_register(struct pardevice *device)
 {
 	struct parport_device_sysctl_table *t;
 	struct parport * port = device->port;

 	t = kmalloc(sizeof(*t), GFP_KERNEL);
 	if (t == NULL)
 		return -ENOMEM;
 	memcpy(t, &parport_device_sysctl_template, sizeof(*t));

 	t->dev_dir[0].child = t->parport_dir;
 	t->parport_dir[0].child = t->port_dir;
 	t->port_dir[0].procname = port->name;
 	t->port_dir[0].ctl_name = 0;
 	t->port_dir[0].child = t->devices_root_dir;
 	t->devices_root_dir[0].child = t->device_dir;

 	t->device_dir[0].ctl_name = 0;
 	t->device_dir[0].procname = device->name;
 	t->device_dir[0].child = t->vars;
 	t->vars[0].data = &device->timeslice;

 	t->sysctl_header = register_sysctl_table(t->dev_dir);
 	if (t->sysctl_header == NULL) {
 		kfree(t);
 		t = NULL;
 	}
 	device->sysctl_table = t;
 	return 0;
 }

 int parport_device_proc_unregister(struct pardevice *device)
 {
 	if (device->sysctl_table) {
 		struct parport_device_sysctl_table *t = device->sysctl_table;
 		device->sysctl_table = NULL;
 		unregister_sysctl_table(t->sysctl_header);
 		kfree(t);
 	}
 	return 0;
 }

 static int __init parport_default_proc_register(void)
 {
 	parport_default_sysctl_table.sysctl_header =
 		register_sysctl_table(parport_default_sysctl_table.dev_dir);
 	return 0;
 }

 static void __exit parport_default_proc_unregister(void)
 {
 	if (parport_default_sysctl_table.sysctl_header) {
 		unregister_sysctl_table(parport_default_sysctl_table.
 					sysctl_header);
 		parport_default_sysctl_table.sysctl_header = NULL;
 	}
 }

 #else /* no sysctl or no procfs*/

 int parport_proc_register(struct parport *pp)
 {
 	return 0;
 }

 int parport_proc_unregister(struct parport *pp)
 {
 	return 0;
 }

 int parport_device_proc_register(struct pardevice *device)
 {
 	return 0;
 }

 int parport_device_proc_unregister(struct pardevice *device)
 {
 	return 0;
 }

 static int __init parport_default_proc_register (void)
 {
 	return 0;
 }

 static void __exit parport_default_proc_unregister (void)
 {
 }
 #endif

 module_init(parport_default_proc_register)
 module_exit(parport_default_proc_unregister)
	/* Sysctl interface for parport devices.
	*
	* Authors: David Campbell
	* Tim Waugh <tim@cyberelk.demon.co.uk>
	* Philip Blundell <philb@gnu.org>
	* Andrea Arcangeli
	* Riccardo Facchetti <fizban@tin.it>
	*
	* based on work by Grant Guenther <grant@torque.net>
	* and Philip Blundell
	*
	* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
	*/

	#include <linux/string.h>
	#include <linux/init.h>
	#include <linux/module.h>
	#include <linux/errno.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/parport.h>
	#include <linux/ctype.h>
	#include <linux/sysctl.h>

	#include <asm/uaccess.h>

	#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)

	#define PARPORT_MIN_TIMESLICE_VALUE 1ul
	#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
	#define PARPORT_MIN_SPINTIME_VALUE 1
	#define PARPORT_MAX_SPINTIME_VALUE 1000

	static int do_active_device(ctl_table table, int write, struct file filp,
	void __user result, size_t lenp, loff_t *ppos)
	{
	struct parport port = (struct parport )table->extra1;
	char buffer[256];
	struct pardevice *dev;
	int len = 0;

	if (write) /* can't happen anyway */
	return -EACCES;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	for (dev = port->devices; dev ; dev = dev->next) {
	if(dev == port->cad) {
	len += sprintf(buffer, "%s\n", dev->name);
	}
	}

	if(!len) {
	len += sprintf(buffer, "%s\n", "none");
	}

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
	}

	#ifdef CONFIG_PARPORT_1284
	static int do_autoprobe(ctl_table table, int write, struct file filp,
	void __user result, size_t lenp, loff_t *ppos)
	{
	struct parport_device_info *info = table->extra2;
	const char *str;
	char buffer[256];
	int len = 0;

	if (write) /* permissions stop this */
	return -EACCES;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	if ((str = info->class_name) != NULL)
	len += sprintf (buffer + len, "CLASS:%s;\n", str);

	if ((str = info->model) != NULL)
	len += sprintf (buffer + len, "MODEL:%s;\n", str);

	if ((str = info->mfr) != NULL)
	len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);

	if ((str = info->description) != NULL)
	len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);

	if ((str = info->cmdset) != NULL)
	len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user (result, buffer, len) ? -EFAULT : 0;
	}
	#endif /* IEEE1284.3 support. */

	static int do_hardware_base_addr (ctl_table *table, int write,
	struct file filp, void __user result,
	size_t lenp, loff_t ppos)
	{
	struct parport port = (struct parport )table->extra1;
	char buffer[20];
	int len = 0;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	if (write) /* permissions prevent this anyway */
	return -EACCES;

	len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
	}

	static int do_hardware_irq (ctl_table *table, int write,
	struct file filp, void __user result,
	size_t lenp, loff_t ppos)
	{
	struct parport port = (struct parport )table->extra1;
	char buffer[20];
	int len = 0;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	if (write) /* permissions prevent this anyway */
	return -EACCES;

	len += sprintf (buffer, "%d\n", port->irq);

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
	}

	static int do_hardware_dma (ctl_table *table, int write,
	struct file filp, void __user result,
	size_t lenp, loff_t ppos)
	{
	struct parport port = (struct parport )table->extra1;
	char buffer[20];
	int len = 0;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	if (write) /* permissions prevent this anyway */
	return -EACCES;

	len += sprintf (buffer, "%d\n", port->dma);

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
	}

	static int do_hardware_modes (ctl_table *table, int write,
	struct file filp, void __user result,
	size_t lenp, loff_t ppos)
	{
	struct parport port = (struct parport )table->extra1;
	char buffer[40];
	int len = 0;

	if (*ppos) {
	*lenp = 0;
	return 0;
	}

	if (write) /* permissions prevent this anyway */
	return -EACCES;

	{
	#define printmode(x) {if(port->modes&PARPORT_MODE_##x){len+=sprintf(buffer+len,"%s%s",f?",":"",#x);f++;}}
	int f = 0;
	printmode(PCSPP);
	printmode(TRISTATE);
	printmode(COMPAT);
	printmode(EPP);
	printmode(ECP);
	printmode(DMA);
	#undef printmode
	}
	buffer[len++] = '\n';

	if (len > *lenp)
	len = *lenp;
	else
	*lenp = len;

	*ppos += len;

	return copy_to_user(result, buffer, len) ? -EFAULT : 0;
	}

	#define PARPORT_PORT_DIR(CHILD) { .ctl_name = 0, .procname = NULL, .mode = 0555, .child = CHILD }
	#define PARPORT_PARPORT_DIR(CHILD) { .ctl_name = DEV_PARPORT, .procname = "parport", \
	.mode = 0555, .child = CHILD }
	#define PARPORT_DEV_DIR(CHILD) { .ctl_name = CTL_DEV, .procname = "dev", .mode = 0555, .child = CHILD }
	#define PARPORT_DEVICES_ROOT_DIR { .procname = "devices", \
	.mode = 0555, .child = NULL }

	static const unsigned long parport_min_timeslice_value =
	PARPORT_MIN_TIMESLICE_VALUE;

	static const unsigned long parport_max_timeslice_value =
	PARPORT_MAX_TIMESLICE_VALUE;

	static const int parport_min_spintime_value =
	PARPORT_MIN_SPINTIME_VALUE;

	static const int parport_max_spintime_value =
	PARPORT_MAX_SPINTIME_VALUE;


	struct parport_sysctl_table {
	struct ctl_table_header *sysctl_header;
	ctl_table vars[12];
	ctl_table device_dir[2];
	ctl_table port_dir[2];
	ctl_table parport_dir[2];
	ctl_table dev_dir[2];
	};

	static const struct parport_sysctl_table parport_sysctl_template = {
	.sysctl_header = NULL,
	{
	{
	.procname = "spintime",
	.data = NULL,
	.maxlen = sizeof(int),
	.mode = 0644,
	.proc_handler = &proc_dointvec_minmax,
	.extra1 = (void*) &parport_min_spintime_value,
	.extra2 = (void*) &parport_max_spintime_value
	},
	{
	.procname = "base-addr",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_hardware_base_addr
	},
	{
	.procname = "irq",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_hardware_irq
	},
	{
	.procname = "dma",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_hardware_dma
	},
	{
	.procname = "modes",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_hardware_modes
	},
	PARPORT_DEVICES_ROOT_DIR,
	#ifdef CONFIG_PARPORT_1284
	{
	.procname = "autoprobe",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_autoprobe
	},
	{
	.procname = "autoprobe0",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_autoprobe
	},
	{
	.procname = "autoprobe1",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_autoprobe
	},
	{
	.procname = "autoprobe2",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_autoprobe
	},
	{
	.procname = "autoprobe3",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_autoprobe
	},
	#endif /* IEEE 1284 support */
	{}
	},
	{
	{
	.procname = "active",
	.data = NULL,
	.maxlen = 0,
	.mode = 0444,
	.proc_handler = &do_active_device
	},
	{}
	},
	{
	PARPORT_PORT_DIR(NULL),
	{}
	},
	{
	PARPORT_PARPORT_DIR(NULL),
	{}
	},
	{
	PARPORT_DEV_DIR(NULL),
	{}
	}
	};

	struct parport_device_sysctl_table
	{
	struct ctl_table_header *sysctl_header;
	ctl_table vars[2];
	ctl_table device_dir[2];
	ctl_table devices_root_dir[2];
	ctl_table port_dir[2];
	ctl_table parport_dir[2];
	ctl_table dev_dir[2];
	};

	static const struct parport_device_sysctl_table
	parport_device_sysctl_template = {
	.sysctl_header = NULL,
	{
	{
	.procname = "timeslice",
	.data = NULL,
	.maxlen = sizeof(int),
	.mode = 0644,
	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	.extra1 = (void*) &parport_min_timeslice_value,
	.extra2 = (void*) &parport_max_timeslice_value
	},
	},
	{
	{
	.ctl_name = 0,
	.procname = NULL,
	.data = NULL,
	.maxlen = 0,
	.mode = 0555,
	.child = NULL
	},
	{}
	},
	{
	PARPORT_DEVICES_ROOT_DIR,
	{}
	},
	{
	PARPORT_PORT_DIR(NULL),
	{}
	},
	{
	PARPORT_PARPORT_DIR(NULL),
	{}
	},
	{
	PARPORT_DEV_DIR(NULL),
	{}
	}
	};

	struct parport_default_sysctl_table
	{
	struct ctl_table_header *sysctl_header;
	ctl_table vars[3];
	ctl_table default_dir[2];
	ctl_table parport_dir[2];
	ctl_table dev_dir[2];
	};

	extern unsigned long parport_default_timeslice;
	extern int parport_default_spintime;

	static struct parport_default_sysctl_table
	parport_default_sysctl_table = {
	.sysctl_header = NULL,
	{
	{
	.procname = "timeslice",
	.data = &parport_default_timeslice,
	.maxlen = sizeof(parport_default_timeslice),
	.mode = 0644,
	.proc_handler = &proc_doulongvec_ms_jiffies_minmax,
	.extra1 = (void*) &parport_min_timeslice_value,
	.extra2 = (void*) &parport_max_timeslice_value
	},
	{
	.procname = "spintime",
	.data = &parport_default_spintime,
	.maxlen = sizeof(parport_default_spintime),
	.mode = 0644,
	.proc_handler = &proc_dointvec_minmax,
	.extra1 = (void*) &parport_min_spintime_value,
	.extra2 = (void*) &parport_max_spintime_value
	},
	{}
	},
	{
	{
	.ctl_name = DEV_PARPORT_DEFAULT,
	.procname = "default",
	.mode = 0555,
	.child = parport_default_sysctl_table.vars
	},
	{}
	},
	{
	PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
	{}
	},
	{
	PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir),
	{}
	}
	};


	int parport_proc_register(struct parport *port)
	{
	struct parport_sysctl_table *t;
	int i;

	t = kmalloc(sizeof(*t), GFP_KERNEL);
	if (t == NULL)
	return -ENOMEM;
	memcpy(t, &parport_sysctl_template, sizeof(*t));

	t->device_dir[0].extra1 = port;

	for (i = 0; i < 5; i++)
	t->vars[i].extra1 = port;

	t->vars[0].data = &port->spintime;
	t->vars[5].child = t->device_dir;

	for (i = 0; i < 5; i++)
	t->vars[6 + i].extra2 = &port->probe_info[i];

	t->port_dir[0].procname = port->name;
	t->port_dir[0].ctl_name = 0;

	t->port_dir[0].child = t->vars;
	t->parport_dir[0].child = t->port_dir;
	t->dev_dir[0].child = t->parport_dir;

	t->sysctl_header = register_sysctl_table(t->dev_dir);
	if (t->sysctl_header == NULL) {
	kfree(t);
	t = NULL;
	}
	port->sysctl_table = t;
	return 0;
	}

	int parport_proc_unregister(struct parport *port)
	{
	if (port->sysctl_table) {
	struct parport_sysctl_table *t = port->sysctl_table;
	port->sysctl_table = NULL;
	unregister_sysctl_table(t->sysctl_header);
	kfree(t);
	}
	return 0;
	}

	int parport_device_proc_register(struct pardevice *device)
	{
	struct parport_device_sysctl_table *t;
	struct parport * port = device->port;

	t = kmalloc(sizeof(*t), GFP_KERNEL);
	if (t == NULL)
	return -ENOMEM;
	memcpy(t, &parport_device_sysctl_template, sizeof(*t));

	t->dev_dir[0].child = t->parport_dir;
	t->parport_dir[0].child = t->port_dir;
	t->port_dir[0].procname = port->name;
	t->port_dir[0].ctl_name = 0;
	t->port_dir[0].child = t->devices_root_dir;
	t->devices_root_dir[0].child = t->device_dir;

	t->device_dir[0].ctl_name = 0;
	t->device_dir[0].procname = device->name;
	t->device_dir[0].child = t->vars;
	t->vars[0].data = &device->timeslice;

	t->sysctl_header = register_sysctl_table(t->dev_dir);
	if (t->sysctl_header == NULL) {
	kfree(t);
	t = NULL;
	}
	device->sysctl_table = t;
	return 0;
	}

	int parport_device_proc_unregister(struct pardevice *device)
	{
	if (device->sysctl_table) {
	struct parport_device_sysctl_table *t = device->sysctl_table;
	device->sysctl_table = NULL;
	unregister_sysctl_table(t->sysctl_header);
	kfree(t);
	}
	return 0;
	}

	static int __init parport_default_proc_register(void)
	{
	parport_default_sysctl_table.sysctl_header =
	register_sysctl_table(parport_default_sysctl_table.dev_dir);
	return 0;
	}

	static void __exit parport_default_proc_unregister(void)
	{
	if (parport_default_sysctl_table.sysctl_header) {
	unregister_sysctl_table(parport_default_sysctl_table.
	sysctl_header);
	parport_default_sysctl_table.sysctl_header = NULL;
	}
	}

	#else /* no sysctl or no procfs*/

	int parport_proc_register(struct parport *pp)
	{
	return 0;
	}

	int parport_proc_unregister(struct parport *pp)
	{
	return 0;
	}

	int parport_device_proc_register(struct pardevice *device)
	{
	return 0;
	}

	int parport_device_proc_unregister(struct pardevice *device)
	{
	return 0;
	}

	static int __init parport_default_proc_register (void)
	{
	return 0;
	}

	static void __exit parport_default_proc_unregister (void)
	{
	}
	#endif

	module_init(parport_default_proc_register)
	module_exit(parport_default_proc_unregister)