Viewing file:  procfs.c (12.06 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Sysctl interface for parport devices.
*
* Authors: David Campbell <campbell@torque.net>
* 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/config.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 *result, size_t *lenp)
{
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 (filp->f_pos) {
*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;
filp->f_pos += 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 *result, size_t *lenp)
{
struct parport_device_info *info = table->extra2;
const char *str;
char buffer[256];
int len = 0;
if (write) /* permissions stop this */
return -EACCES;
if (filp->f_pos) {
*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;
filp->f_pos += 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 *result,
size_t *lenp)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (filp->f_pos) {
*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;
filp->f_pos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_irq (ctl_table *table, int write,
struct file *filp, void *result,
size_t *lenp)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (filp->f_pos) {
*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;
filp->f_pos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_dma (ctl_table *table, int write,
struct file *filp, void *result,
size_t *lenp)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[20];
int len = 0;
if (filp->f_pos) {
*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;
filp->f_pos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
static int do_hardware_modes (ctl_table *table, int write,
struct file *filp, void *result,
size_t *lenp)
{
struct parport *port = (struct parport *)table->extra1;
char buffer[40];
int len = 0;
if (filp->f_pos) {
*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;
filp->f_pos += len;
return copy_to_user(result, buffer, len) ? -EFAULT : 0;
}
#define PARPORT_PORT_DIR(child) { 0, NULL, NULL, 0, 0555, child }
#define PARPORT_PARPORT_DIR(child) { DEV_PARPORT, "parport", \
NULL, 0, 0555, child }
#define PARPORT_DEV_DIR(child) { CTL_DEV, "dev", NULL, 0, 0555, child }
#define PARPORT_DEVICES_ROOT_DIR { DEV_PARPORT_DEVICES, "devices", \
NULL, 0, 0555, 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 = {
NULL,
{
{ DEV_PARPORT_SPINTIME, "spintime",
NULL, sizeof(int), 0644, NULL,
&proc_dointvec_minmax, NULL, NULL,
(void*) &parport_min_spintime_value,
(void*) &parport_max_spintime_value },
{ DEV_PARPORT_BASE_ADDR, "base-addr",
NULL, 0, 0444, NULL,
&do_hardware_base_addr },
{ DEV_PARPORT_IRQ, "irq",
NULL, 0, 0444, NULL,
&do_hardware_irq },
{ DEV_PARPORT_DMA, "dma",
NULL, 0, 0444, NULL,
&do_hardware_dma },
{ DEV_PARPORT_MODES, "modes",
NULL, 0, 0444, NULL,
&do_hardware_modes },
PARPORT_DEVICES_ROOT_DIR,
#ifdef CONFIG_PARPORT_1284
{ DEV_PARPORT_AUTOPROBE, "autoprobe",
NULL, 0, 0444, NULL,
&do_autoprobe },
{ DEV_PARPORT_AUTOPROBE + 1, "autoprobe0",
NULL, 0, 0444, NULL,
&do_autoprobe },
{ DEV_PARPORT_AUTOPROBE + 2, "autoprobe1",
NULL, 0, 0444, NULL,
&do_autoprobe },
{ DEV_PARPORT_AUTOPROBE + 3, "autoprobe2",
NULL, 0, 0444, NULL,
&do_autoprobe },
{ DEV_PARPORT_AUTOPROBE + 4, "autoprobe3",
NULL, 0, 0444, NULL,
&do_autoprobe },
#endif /* IEEE 1284 support */
{0}
},
{ {DEV_PARPORT_DEVICES_ACTIVE, "active", NULL, 0, 0444, NULL,
&do_active_device }, {0}},
{ PARPORT_PORT_DIR(NULL), {0}},
{ PARPORT_PARPORT_DIR(NULL), {0}},
{ PARPORT_DEV_DIR(NULL), {0}}
};
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 = {
NULL,
{
{ DEV_PARPORT_DEVICE_TIMESLICE, "timeslice",
NULL, sizeof(int), 0644, NULL,
&proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
(void*) &parport_min_timeslice_value,
(void*) &parport_max_timeslice_value },
},
{ {0, NULL, NULL, 0, 0555, NULL}, {0}},
{ PARPORT_DEVICES_ROOT_DIR, {0}},
{ PARPORT_PORT_DIR(NULL), {0}},
{ PARPORT_PARPORT_DIR(NULL), {0}},
{ PARPORT_DEV_DIR(NULL), {0}}
};
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 = {
NULL,
{
{ DEV_PARPORT_DEFAULT_TIMESLICE, "timeslice",
&parport_default_timeslice,
sizeof(parport_default_timeslice), 0644, NULL,
&proc_doulongvec_ms_jiffies_minmax, NULL, NULL,
(void*) &parport_min_timeslice_value,
(void*) &parport_max_timeslice_value },
{ DEV_PARPORT_DEFAULT_SPINTIME, "spintime",
&parport_default_spintime,
sizeof(parport_default_spintime), 0644, NULL,
&proc_dointvec_minmax, NULL, NULL,
(void*) &parport_min_spintime_value,
(void*) &parport_max_spintime_value },
{0}
},
{ { DEV_PARPORT_DEFAULT, "default", NULL, 0, 0555,
parport_default_sysctl_table.vars },{0}},
{
PARPORT_PARPORT_DIR(parport_default_sysctl_table.default_dir),
{0}},
{ PARPORT_DEV_DIR(parport_default_sysctl_table.parport_dir), {0}}
};
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 < 8; 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 = port->number + 1; /* nb 0 isn't legal here */
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, 0);
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 = port->number + 1; /* nb 0 isn't legal here */
t->port_dir[0].child = t->devices_root_dir;
t->devices_root_dir[0].child = t->device_dir;
#ifdef CONFIG_PARPORT_1284
t->device_dir[0].ctl_name =
parport_device_num(port->number, port->muxport,
device->daisy)
+ 1; /* nb 0 isn't legal here */
#else /* No IEEE 1284 support */
/* parport_device_num isn't available. */
t->device_dir[0].ctl_name = 1;
#endif /* IEEE 1284 support or not */
t->device_dir[0].procname = device->name;
t->device_dir[0].extra1 = device;
t->device_dir[0].child = t->vars;
t->vars[0].data = &device->timeslice;
t->sysctl_header = register_sysctl_table(t->dev_dir, 0);
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;
}
int parport_default_proc_register(void)
{
parport_default_sysctl_table.sysctl_header =
register_sysctl_table(parport_default_sysctl_table.dev_dir, 0);
return 0;
}
int 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;
}
return 0;
}
#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;
}
int parport_default_proc_register (void)
{
return 0;
}
int parport_default_proc_unregister (void)
{
return 0;
}
#endif
|