[linux-2.6-block.git] / drivers / parport / procfs.c

// SPDX-License-Identifier: GPL-2.0
/* 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 <linux/device.h>

#include <linux/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
/*
 * PARPORT_BASE_* is the size of the known parts of the sysctl path
 * in dev/partport/%s/devices/%s. "dev/parport/"(12), "/devices/"(9
 * and null char(1).
 */
#define PARPORT_BASE_PATH_SIZE 13
#define PARPORT_BASE_DEVICES_PATH_SIZE 22

static int do_active_device(struct ctl_table *table, int write,
		      void *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;
	memcpy(result, buffer, len);
	return 0;
}

#ifdef CONFIG_PARPORT_1284
static int do_autoprobe(struct ctl_table *table, int write,
			void *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;

	memcpy(result, buffer, len);
	return 0;
}
#endif /* IEEE1284.3 support. */

static int do_hardware_base_addr(struct ctl_table *table, int write,
				 void *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;
	memcpy(result, buffer, len);
	return 0;
}

static int do_hardware_irq(struct ctl_table *table, int write,
			   void *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;
	memcpy(result, buffer, len);
	return 0;
}

static int do_hardware_dma(struct ctl_table *table, int write,
			   void *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;
	memcpy(result, buffer, len);
	return 0;
}

static int do_hardware_modes(struct ctl_table *table, int write,
			     void *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)							\
do {									\
	if (port->modes & PARPORT_MODE_##x)				\
		len += sprintf(buffer + len, "%s%s", f++ ? "," : "", #x); \
} while (0)
		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;
	memcpy(result, buffer, len);
	return 0;
}

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 *port_header;
	struct ctl_table_header *devices_header;
	struct ctl_table vars[12];
	struct ctl_table device_dir[2];
};

static const struct parport_sysctl_table parport_sysctl_template = {
	.port_header = NULL,
	.devices_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
		},
#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
		},
		{}
	},
};

struct parport_device_sysctl_table
{
	struct ctl_table_header *sysctl_header;
	struct ctl_table vars[2];
	struct ctl_table device_dir[2];
	struct ctl_table devices_root_dir[2];
	struct ctl_table port_dir[2];
	struct ctl_table parport_dir[2];
	struct 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(unsigned long),
			.mode		= 0644,
			.proc_handler	= proc_doulongvec_ms_jiffies_minmax,
			.extra1		= (void*) &parport_min_timeslice_value,
			.extra2		= (void*) &parport_max_timeslice_value
		},
		{}
	},
	{
		{
			.procname	= NULL,
			.data		= NULL,
			.maxlen		= 0,
			.mode		= 0555,
		},
		{}
	}
};

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

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
		},
		{}
	}
};

int parport_proc_register(struct parport *port)
{
	struct parport_sysctl_table *t;
	char *tmp_dir_path;
	size_t tmp_path_len, port_name_len;
	int bytes_written, i, err = 0;

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

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

	t->vars[0].data = &port->spintime;
	for (i = 0; i < 5; i++) {
		t->vars[i].extra1 = port;
		t->vars[5 + i].extra2 = &port->probe_info[i];
	}

	port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
	/*
	 * Allocate a buffer for two paths: dev/parport/PORT and dev/parport/PORT/devices.
	 * We calculate for the second as that will give us enough for the first.
	 */
	tmp_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len;
	tmp_dir_path = kzalloc(tmp_path_len, GFP_KERNEL);
	if (!tmp_dir_path) {
		err = -ENOMEM;
		goto exit_free_t;
	}

	bytes_written = snprintf(tmp_dir_path, tmp_path_len,
				 "dev/parport/%s/devices", port->name);
	if (tmp_path_len <= bytes_written) {
		err = -ENOENT;
		goto exit_free_tmp_dir_path;
	}
	t->devices_header = register_sysctl(tmp_dir_path, t->device_dir);
	if (t->devices_header == NULL) {
		err = -ENOENT;
		goto  exit_free_tmp_dir_path;
	}

	tmp_path_len = PARPORT_BASE_PATH_SIZE + port_name_len;
	bytes_written = snprintf(tmp_dir_path, tmp_path_len,
				 "dev/parport/%s", port->name);
	if (tmp_path_len <= bytes_written) {
		err = -ENOENT;
		goto unregister_devices_h;
	}

	t->port_header = register_sysctl(tmp_dir_path, t->vars);
	if (t->port_header == NULL) {
		err = -ENOENT;
		goto unregister_devices_h;
	}

	port->sysctl_table = t;

	kfree(tmp_dir_path);
	return 0;

unregister_devices_h:
	unregister_sysctl_table(t->devices_header);

exit_free_tmp_dir_path:
	kfree(tmp_dir_path);

exit_free_t:
	kfree(t);
	return err;
}

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->devices_header);
		unregister_sysctl_table(t->port_header);
		kfree(t);
	}
	return 0;
}

int parport_device_proc_register(struct pardevice *device)
{
	int bytes_written, err = 0;
	struct parport_device_sysctl_table *t;
	struct parport * port = device->port;
	size_t port_name_len, device_name_len, tmp_dir_path_len;
	char *tmp_dir_path;
	
	t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
	if (t == NULL)
		return -ENOMEM;

	port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
	device_name_len = strnlen(device->name, PATH_MAX);

	/* Allocate a buffer for two paths: dev/parport/PORT/devices/DEVICE. */
	tmp_dir_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len + device_name_len;
	tmp_dir_path = kzalloc(tmp_dir_path_len, GFP_KERNEL);
	if (!tmp_dir_path) {
		err = -ENOMEM;
		goto exit_free_t;
	}

	bytes_written = snprintf(tmp_dir_path, tmp_dir_path_len, "dev/parport/%s/devices/%s",
				 port->name, device->name);
	if (tmp_dir_path_len <= bytes_written) {
		err = -ENOENT;
		goto exit_free_path;
	}

	t->vars[0].data = &device->timeslice;

	t->sysctl_header = register_sysctl(tmp_dir_path, t->vars);
	if (t->sysctl_header == NULL) {
		kfree(t);
		t = NULL;
	}
	device->sysctl_table = t;

	kfree(tmp_dir_path);
	return 0;

exit_free_path:
	kfree(tmp_dir_path);

exit_free_t:
	kfree(t);

	return err;
}

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)
{
	int ret;

	parport_default_sysctl_table.sysctl_header =
		register_sysctl("dev/parport/default", parport_default_sysctl_table.vars);
	if (!parport_default_sysctl_table.sysctl_header)
		return -ENOMEM;
	ret = parport_bus_init();
	if (ret) {
		unregister_sysctl_table(parport_default_sysctl_table.
					sysctl_header);
		return ret;
	}
	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;
	}
	parport_bus_exit();
}

#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 parport_bus_init();
}

static void __exit parport_default_proc_unregister (void)
{
	parport_bus_exit();
}
#endif

subsys_initcall(parport_default_proc_register)
module_exit(parport_default_proc_unregister)
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* Sysctl interface for parport devices.
1da177e4 LT	3	*
bdca3f20	4	* Authors: David Campbell
1da177e4 LT	5	* Tim Waugh <tim@cyberelk.demon.co.uk>
	6	* Philip Blundell <philb@gnu.org>
	7	* Andrea Arcangeli
	8	* Riccardo Facchetti <fizban@tin.it>
	9	*
	10	* based on work by Grant Guenther <grant@torque.net>
	11	* and Philip Blundell
	12	*
	13	* Cleaned up include files - Russell King <linux@arm.uk.linux.org>
	14	*/
	15
	16	#include <linux/string.h>
1da177e4 LT	17	#include <linux/init.h>
	18	#include <linux/module.h>
	19	#include <linux/errno.h>
	20	#include <linux/kernel.h>
	21	#include <linux/slab.h>
	22	#include <linux/parport.h>
	23	#include <linux/ctype.h>
	24	#include <linux/sysctl.h>
6fa45a22	25	#include <linux/device.h>
1da177e4	26
7c0f6ba6	27	#include <linux/uaccess.h>
1da177e4 LT	28
	29	#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
	30
	31	#define PARPORT_MIN_TIMESLICE_VALUE 1ul
	32	#define PARPORT_MAX_TIMESLICE_VALUE ((unsigned long) HZ)
	33	#define PARPORT_MIN_SPINTIME_VALUE 1
	34	#define PARPORT_MAX_SPINTIME_VALUE 1000
93810936 JG	35	/*
	36	* PARPORT_BASE_* is the size of the known parts of the sysctl path
	37	* in dev/partport/%s/devices/%s. "dev/parport/"(12), "/devices/"(9
	38	* and null char(1).
	39	*/
	40	#define PARPORT_BASE_PATH_SIZE 13
	41	#define PARPORT_BASE_DEVICES_PATH_SIZE 22
1da177e4	42
be424c63	43	static int do_active_device(struct ctl_table *table, int write,
32927393	44	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	45	{
	46	struct parport port = (struct parport )table->extra1;
	47	char buffer[256];
	48	struct pardevice *dev;
	49	int len = 0;
	50
	51	if (write) /* can't happen anyway */
	52	return -EACCES;
	53
	54	if (*ppos) {
	55	*lenp = 0;
	56	return 0;
	57	}
	58
	59	for (dev = port->devices; dev ; dev = dev->next) {
	60	if(dev == port->cad) {
	61	len += sprintf(buffer, "%s\n", dev->name);
	62	}
	63	}
	64
	65	if(!len) {
	66	len += sprintf(buffer, "%s\n", "none");
	67	}
	68
	69	if (len > *lenp)
	70	len = *lenp;
	71	else
	72	*lenp = len;
	73
	74	*ppos += len;
32927393 CH	75	memcpy(result, buffer, len);
32927393 CH	76	return 0;
1da177e4 LT	77	}
	78
	79	#ifdef CONFIG_PARPORT_1284
be424c63	80	static int do_autoprobe(struct ctl_table *table, int write,
32927393	81	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	82	{
	83	struct parport_device_info *info = table->extra2;
	84	const char *str;
	85	char buffer[256];
	86	int len = 0;
	87
	88	if (write) /* permissions stop this */
	89	return -EACCES;
	90
	91	if (*ppos) {
	92	*lenp = 0;
	93	return 0;
	94	}
	95
	96	if ((str = info->class_name) != NULL)
	97	len += sprintf (buffer + len, "CLASS:%s;\n", str);
	98
	99	if ((str = info->model) != NULL)
	100	len += sprintf (buffer + len, "MODEL:%s;\n", str);
	101
	102	if ((str = info->mfr) != NULL)
	103	len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str);
	104
	105	if ((str = info->description) != NULL)
	106	len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str);
	107
	108	if ((str = info->cmdset) != NULL)
	109	len += sprintf (buffer + len, "COMMAND SET:%s;\n", str);
	110
	111	if (len > *lenp)
	112	len = *lenp;
	113	else
	114	*lenp = len;
	115
	116	*ppos += len;
	117
32927393 CH	118	memcpy(result, buffer, len);
32927393 CH	119	return 0;
1da177e4 LT	120	}
	121	#endif /* IEEE1284.3 support. */
	122
be424c63	123	static int do_hardware_base_addr(struct ctl_table *table, int write,
32927393	124	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	125	{
	126	struct parport port = (struct parport )table->extra1;
	127	char buffer[20];
	128	int len = 0;
	129
	130	if (*ppos) {
	131	*lenp = 0;
	132	return 0;
	133	}
	134
	135	if (write) /* permissions prevent this anyway */
	136	return -EACCES;
	137
	138	len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi);
	139
	140	if (len > *lenp)
	141	len = *lenp;
	142	else
	143	*lenp = len;
	144
	145	*ppos += len;
32927393 CH	146	memcpy(result, buffer, len);
32927393 CH	147	return 0;
1da177e4 LT	148	}
1da177e4 LT	149
be424c63	150	static int do_hardware_irq(struct ctl_table *table, int write,
32927393	151	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	152	{
	153	struct parport port = (struct parport )table->extra1;
	154	char buffer[20];
	155	int len = 0;
	156
	157	if (*ppos) {
	158	*lenp = 0;
	159	return 0;
	160	}
	161
	162	if (write) /* permissions prevent this anyway */
	163	return -EACCES;
	164
	165	len += sprintf (buffer, "%d\n", port->irq);
	166
	167	if (len > *lenp)
	168	len = *lenp;
	169	else
	170	*lenp = len;
	171
	172	*ppos += len;
32927393 CH	173	memcpy(result, buffer, len);
32927393 CH	174	return 0;
1da177e4 LT	175	}
1da177e4 LT	176
be424c63	177	static int do_hardware_dma(struct ctl_table *table, int write,
32927393	178	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	179	{
	180	struct parport port = (struct parport )table->extra1;
	181	char buffer[20];
	182	int len = 0;
	183
	184	if (*ppos) {
	185	*lenp = 0;
	186	return 0;
	187	}
	188
	189	if (write) /* permissions prevent this anyway */
	190	return -EACCES;
	191
	192	len += sprintf (buffer, "%d\n", port->dma);
	193
	194	if (len > *lenp)
	195	len = *lenp;
	196	else
	197	*lenp = len;
	198
	199	*ppos += len;
32927393 CH	200	memcpy(result, buffer, len);
32927393 CH	201	return 0;
1da177e4 LT	202	}
1da177e4 LT	203
be424c63	204	static int do_hardware_modes(struct ctl_table *table, int write,
32927393	205	void result, size_t lenp, loff_t *ppos)
1da177e4 LT	206	{
	207	struct parport port = (struct parport )table->extra1;
	208	char buffer[40];
	209	int len = 0;
	210
	211	if (*ppos) {
	212	*lenp = 0;
	213	return 0;
	214	}
	215
	216	if (write) /* permissions prevent this anyway */
	217	return -EACCES;
	218
	219	{
a6abfdff JP	220	#define printmode(x) \
	221	do { \
	222	if (port->modes & PARPORT_MODE_##x) \
	223	len += sprintf(buffer + len, "%s%s", f++ ? "," : "", #x); \
	224	} while (0)
1da177e4 LT	225	int f = 0;
	226	printmode(PCSPP);
	227	printmode(TRISTATE);
	228	printmode(COMPAT);
	229	printmode(EPP);
	230	printmode(ECP);
	231	printmode(DMA);
	232	#undef printmode
	233	}
	234	buffer[len++] = '\n';
	235
	236	if (len > *lenp)
	237	len = *lenp;
	238	else
	239	*lenp = len;
	240
	241	*ppos += len;
32927393 CH	242	memcpy(result, buffer, len);
32927393 CH	243	return 0;
1da177e4 LT	244	}
1da177e4 LT	245
1da177e4 LT	246	static const unsigned long parport_min_timeslice_value =
	247	PARPORT_MIN_TIMESLICE_VALUE;
	248
	249	static const unsigned long parport_max_timeslice_value =
	250	PARPORT_MAX_TIMESLICE_VALUE;
	251
	252	static const int parport_min_spintime_value =
	253	PARPORT_MIN_SPINTIME_VALUE;
	254
	255	static const int parport_max_spintime_value =
	256	PARPORT_MAX_SPINTIME_VALUE;
	257
	258
	259	struct parport_sysctl_table {
37e9981e JG	260	struct ctl_table_header *port_header;
37e9981e JG	261	struct ctl_table_header *devices_header;
be424c63 JP	262	struct ctl_table vars[12];
be424c63 JP	263	struct ctl_table device_dir[2];
1da177e4 LT	264	};
	265
	266	static const struct parport_sysctl_table parport_sysctl_template = {
37e9981e JG	267	.port_header = NULL,
	268	.devices_header = NULL,
	269	{
2564b7bd	270	{
2564b7bd EB	271	.procname = "spintime",
	272	.data = NULL,
	273	.maxlen = sizeof(int),
	274	.mode = 0644,
6d456111	275	.proc_handler = proc_dointvec_minmax,
2564b7bd EB	276	.extra1 = (void*) &parport_min_spintime_value,
	277	.extra2 = (void*) &parport_max_spintime_value
	278	},
	279	{
2564b7bd EB	280	.procname = "base-addr",
	281	.data = NULL,
	282	.maxlen = 0,
	283	.mode = 0444,
6d456111	284	.proc_handler = do_hardware_base_addr
2564b7bd EB	285	},
2564b7bd EB	286	{
2564b7bd EB	287	.procname = "irq",
	288	.data = NULL,
	289	.maxlen = 0,
	290	.mode = 0444,
6d456111	291	.proc_handler = do_hardware_irq
2564b7bd EB	292	},
2564b7bd EB	293	{
2564b7bd EB	294	.procname = "dma",
	295	.data = NULL,
	296	.maxlen = 0,
	297	.mode = 0444,
6d456111	298	.proc_handler = do_hardware_dma
2564b7bd EB	299	},
2564b7bd EB	300	{
2564b7bd EB	301	.procname = "modes",
	302	.data = NULL,
	303	.maxlen = 0,
	304	.mode = 0444,
6d456111	305	.proc_handler = do_hardware_modes
2564b7bd	306	},
1da177e4	307	#ifdef CONFIG_PARPORT_1284
2564b7bd	308	{
2564b7bd EB	309	.procname = "autoprobe",
	310	.data = NULL,
	311	.maxlen = 0,
	312	.mode = 0444,
6d456111	313	.proc_handler = do_autoprobe
2564b7bd EB	314	},
2564b7bd EB	315	{
2564b7bd EB	316	.procname = "autoprobe0",
	317	.data = NULL,
	318	.maxlen = 0,
	319	.mode = 0444,
6d456111	320	.proc_handler = do_autoprobe
2564b7bd EB	321	},
2564b7bd EB	322	{
2564b7bd EB	323	.procname = "autoprobe1",
	324	.data = NULL,
	325	.maxlen = 0,
	326	.mode = 0444,
6d456111	327	.proc_handler = do_autoprobe
2564b7bd EB	328	},
2564b7bd EB	329	{
2564b7bd EB	330	.procname = "autoprobe2",
	331	.data = NULL,
	332	.maxlen = 0,
	333	.mode = 0444,
6d456111	334	.proc_handler = do_autoprobe
2564b7bd EB	335	},
2564b7bd EB	336	{
2564b7bd EB	337	.procname = "autoprobe3",
	338	.data = NULL,
	339	.maxlen = 0,
	340	.mode = 0444,
6d456111	341	.proc_handler = do_autoprobe
2564b7bd	342	},
1da177e4	343	#endif /* IEEE 1284 support */
2564b7bd	344	{}
1da177e4	345	},
2564b7bd EB	346	{
2564b7bd EB	347	{
2564b7bd EB	348	.procname = "active",
	349	.data = NULL,
	350	.maxlen = 0,
	351	.mode = 0444,
6d456111	352	.proc_handler = do_active_device
2564b7bd EB	353	},
	354	{}
	355	},
1da177e4 LT	356	};
	357
	358	struct parport_device_sysctl_table
	359	{
	360	struct ctl_table_header *sysctl_header;
be424c63 JP	361	struct ctl_table vars[2];
	362	struct ctl_table device_dir[2];
	363	struct ctl_table devices_root_dir[2];
	364	struct ctl_table port_dir[2];
	365	struct ctl_table parport_dir[2];
	366	struct ctl_table dev_dir[2];
1da177e4 LT	367	};
	368
	369	static const struct parport_device_sysctl_table
	370	parport_device_sysctl_template = {
2564b7bd EB	371	.sysctl_header = NULL,
	372	{
	373	{
2564b7bd EB	374	.procname = "timeslice",
2564b7bd EB	375	.data = NULL,
60af8803	376	.maxlen = sizeof(unsigned long),
2564b7bd	377	.mode = 0644,
6d456111	378	.proc_handler = proc_doulongvec_ms_jiffies_minmax,
2564b7bd EB	379	.extra1 = (void*) &parport_min_timeslice_value,
	380	.extra2 = (void*) &parport_max_timeslice_value
	381	},
4199a64a	382	{}
2564b7bd EB	383	},
	384	{
	385	{
2564b7bd EB	386	.procname = NULL,
	387	.data = NULL,
	388	.maxlen = 0,
	389	.mode = 0555,
2564b7bd EB	390	},
2564b7bd EB	391	{}
2564b7bd	392	}
1da177e4 LT	393	};
	394
	395	struct parport_default_sysctl_table
	396	{
	397	struct ctl_table_header *sysctl_header;
be424c63 JP	398	struct ctl_table vars[3];
	399	struct ctl_table default_dir[2];
	400	struct ctl_table parport_dir[2];
	401	struct ctl_table dev_dir[2];
1da177e4 LT	402	};
1da177e4 LT	403
1da177e4 LT	404	static struct parport_default_sysctl_table
1da177e4 LT	405	parport_default_sysctl_table = {
2564b7bd EB	406	.sysctl_header = NULL,
	407	{
	408	{
2564b7bd EB	409	.procname = "timeslice",
	410	.data = &parport_default_timeslice,
	411	.maxlen = sizeof(parport_default_timeslice),
	412	.mode = 0644,
6d456111	413	.proc_handler = proc_doulongvec_ms_jiffies_minmax,
2564b7bd EB	414	.extra1 = (void*) &parport_min_timeslice_value,
	415	.extra2 = (void*) &parport_max_timeslice_value
	416	},
	417	{
2564b7bd EB	418	.procname = "spintime",
	419	.data = &parport_default_spintime,
	420	.maxlen = sizeof(parport_default_spintime),
	421	.mode = 0644,
6d456111	422	.proc_handler = proc_dointvec_minmax,
2564b7bd EB	423	.extra1 = (void*) &parport_min_spintime_value,
	424	.extra2 = (void*) &parport_max_spintime_value
	425	},
	426	{}
2564b7bd	427	}
1da177e4 LT	428	};
1da177e4 LT	429
1da177e4 LT	430	int parport_proc_register(struct parport *port)
	431	{
	432	struct parport_sysctl_table *t;
93810936 JG	433	char *tmp_dir_path;
	434	size_t tmp_path_len, port_name_len;
	435	int bytes_written, i, err = 0;
1da177e4	436
2451a848	437	t = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL);
1da177e4 LT	438	if (t == NULL)
1da177e4 LT	439	return -ENOMEM;
1da177e4 LT	440
	441	t->device_dir[0].extra1 = port;
	442
93810936 JG	443	t->vars[0].data = &port->spintime;
93810936 JG	444	for (i = 0; i < 5; i++) {
1da177e4	445	t->vars[i].extra1 = port;
93810936 JG	446	t->vars[5 + i].extra2 = &port->probe_info[i];
93810936 JG	447	}
1da177e4	448
93810936 JG	449	port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
	450	/*
	451	* Allocate a buffer for two paths: dev/parport/PORT and dev/parport/PORT/devices.
	452	* We calculate for the second as that will give us enough for the first.
	453	*/
	454	tmp_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len;
	455	tmp_dir_path = kzalloc(tmp_path_len, GFP_KERNEL);
	456	if (!tmp_dir_path) {
	457	err = -ENOMEM;
	458	goto exit_free_t;
	459	}
1da177e4	460
93810936 JG	461	bytes_written = snprintf(tmp_dir_path, tmp_path_len,
	462	"dev/parport/%s/devices", port->name);
	463	if (tmp_path_len <= bytes_written) {
	464	err = -ENOENT;
	465	goto exit_free_tmp_dir_path;
	466	}
37e9981e JG	467	t->devices_header = register_sysctl(tmp_dir_path, t->device_dir);
37e9981e JG	468	if (t->devices_header == NULL) {
93810936 JG	469	err = -ENOENT;
	470	goto exit_free_tmp_dir_path;
	471	}
1da177e4	472
93810936 JG	473	tmp_path_len = PARPORT_BASE_PATH_SIZE + port_name_len;
	474	bytes_written = snprintf(tmp_dir_path, tmp_path_len,
	475	"dev/parport/%s", port->name);
	476	if (tmp_path_len <= bytes_written) {
	477	err = -ENOENT;
	478	goto unregister_devices_h;
	479	}
1da177e4	480
37e9981e JG	481	t->port_header = register_sysctl(tmp_dir_path, t->vars);
37e9981e JG	482	if (t->port_header == NULL) {
93810936 JG	483	err = -ENOENT;
93810936 JG	484	goto unregister_devices_h;
1da177e4	485	}
93810936	486
1da177e4	487	port->sysctl_table = t;
93810936 JG	488
93810936 JG	489	kfree(tmp_dir_path);
1da177e4	490	return 0;
93810936 JG	491
93810936 JG	492	unregister_devices_h:
37e9981e	493	unregister_sysctl_table(t->devices_header);
93810936 JG	494
	495	exit_free_tmp_dir_path:
	496	kfree(tmp_dir_path);
	497
	498	exit_free_t:
	499	kfree(t);
	500	return err;
1da177e4 LT	501	}
	502
	503	int parport_proc_unregister(struct parport *port)
	504	{
	505	if (port->sysctl_table) {
	506	struct parport_sysctl_table *t = port->sysctl_table;
	507	port->sysctl_table = NULL;
37e9981e JG	508	unregister_sysctl_table(t->devices_header);
37e9981e JG	509	unregister_sysctl_table(t->port_header);
1da177e4 LT	510	kfree(t);
	511	}
	512	return 0;
	513	}
	514
	515	int parport_device_proc_register(struct pardevice *device)
	516	{
4199a64a	517	int bytes_written, err = 0;
1da177e4 LT	518	struct parport_device_sysctl_table *t;
1da177e4 LT	519	struct parport * port = device->port;
4199a64a JG	520	size_t port_name_len, device_name_len, tmp_dir_path_len;
4199a64a JG	521	char *tmp_dir_path;
1da177e4	522
2451a848	523	t = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL);
1da177e4 LT	524	if (t == NULL)
1da177e4 LT	525	return -ENOMEM;
1da177e4	526
4199a64a JG	527	port_name_len = strnlen(port->name, PARPORT_NAME_MAX_LEN);
	528	device_name_len = strnlen(device->name, PATH_MAX);
	529
	530	/* Allocate a buffer for two paths: dev/parport/PORT/devices/DEVICE. */
	531	tmp_dir_path_len = PARPORT_BASE_DEVICES_PATH_SIZE + port_name_len + device_name_len;
	532	tmp_dir_path = kzalloc(tmp_dir_path_len, GFP_KERNEL);
	533	if (!tmp_dir_path) {
	534	err = -ENOMEM;
	535	goto exit_free_t;
	536	}
	537
	538	bytes_written = snprintf(tmp_dir_path, tmp_dir_path_len, "dev/parport/%s/devices/%s",
	539	port->name, device->name);
	540	if (tmp_dir_path_len <= bytes_written) {
	541	err = -ENOENT;
	542	goto exit_free_path;
	543	}
1da177e4	544
1da177e4 LT	545	t->vars[0].data = &device->timeslice;
1da177e4 LT	546
4199a64a	547	t->sysctl_header = register_sysctl(tmp_dir_path, t->vars);
1da177e4 LT	548	if (t->sysctl_header == NULL) {
	549	kfree(t);
	550	t = NULL;
	551	}
	552	device->sysctl_table = t;
4199a64a JG	553
4199a64a JG	554	kfree(tmp_dir_path);
1da177e4	555	return 0;
4199a64a JG	556
	557	exit_free_path:
	558	kfree(tmp_dir_path);
	559
	560	exit_free_t:
	561	kfree(t);
	562
	563	return err;
1da177e4 LT	564	}
	565
	566	int parport_device_proc_unregister(struct pardevice *device)
	567	{
	568	if (device->sysctl_table) {
	569	struct parport_device_sysctl_table *t = device->sysctl_table;
	570	device->sysctl_table = NULL;
	571	unregister_sysctl_table(t->sysctl_header);
	572	kfree(t);
	573	}
	574	return 0;
	575	}
	576
	577	static int __init parport_default_proc_register(void)
	578	{
6fa45a22 SM	579	int ret;
6fa45a22 SM	580
1da177e4	581	parport_default_sysctl_table.sysctl_header =
02ea1348	582	register_sysctl("dev/parport/default", parport_default_sysctl_table.vars);
6fa45a22 SM	583	if (!parport_default_sysctl_table.sysctl_header)
	584	return -ENOMEM;
	585	ret = parport_bus_init();
	586	if (ret) {
	587	unregister_sysctl_table(parport_default_sysctl_table.
	588	sysctl_header);
	589	return ret;
	590	}
1da177e4 LT	591	return 0;
	592	}
	593
	594	static void __exit parport_default_proc_unregister(void)
	595	{
	596	if (parport_default_sysctl_table.sysctl_header) {
	597	unregister_sysctl_table(parport_default_sysctl_table.
	598	sysctl_header);
	599	parport_default_sysctl_table.sysctl_header = NULL;
	600	}
6fa45a22	601	parport_bus_exit();
1da177e4 LT	602	}
	603
	604	#else /* no sysctl or no procfs*/
	605
	606	int parport_proc_register(struct parport *pp)
	607	{
	608	return 0;
	609	}
	610
	611	int parport_proc_unregister(struct parport *pp)
	612	{
	613	return 0;
	614	}
	615
	616	int parport_device_proc_register(struct pardevice *device)
	617	{
	618	return 0;
	619	}
	620
	621	int parport_device_proc_unregister(struct pardevice *device)
	622	{
	623	return 0;
	624	}
	625
	626	static int __init parport_default_proc_register (void)
	627	{
6fa45a22	628	return parport_bus_init();
1da177e4 LT	629	}
	630
	631	static void __exit parport_default_proc_unregister (void)
	632	{
6fa45a22	633	parport_bus_exit();
1da177e4 LT	634	}
	635	#endif
	636
bbca503b	637	subsys_initcall(parport_default_proc_register)
1da177e4	638	module_exit(parport_default_proc_unregister)