forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
623 lines
13 KiB
623 lines
13 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* Sysctl interface for parport devices. |
|
* |
|
* Authors: David Campbell |
|
* Tim Waugh <[email protected]> |
|
* Philip Blundell <[email protected]> |
|
* Andrea Arcangeli |
|
* Riccardo Facchetti <[email protected]> |
|
* |
|
* based on work by Grant Guenther <[email protected]> |
|
* and Philip Blundell |
|
* |
|
* Cleaned up include files - Russell King <[email protected]> |
|
*/ |
|
|
|
#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 |
|
|
|
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; |
|
} |
|
|
|
#define PARPORT_PORT_DIR(CHILD) { .procname = NULL, .mode = 0555, .child = CHILD } |
|
#define PARPORT_PARPORT_DIR(CHILD) { .procname = "parport", \ |
|
.mode = 0555, .child = CHILD } |
|
#define PARPORT_DEV_DIR(CHILD) { .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; |
|
struct ctl_table vars[12]; |
|
struct ctl_table device_dir[2]; |
|
struct ctl_table port_dir[2]; |
|
struct ctl_table parport_dir[2]; |
|
struct 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; |
|
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, |
|
.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; |
|
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 |
|
}, |
|
{} |
|
}, |
|
{ |
|
{ |
|
.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 = kmemdup(&parport_sysctl_template, sizeof(*t), GFP_KERNEL); |
|
if (t == NULL) |
|
return -ENOMEM; |
|
|
|
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].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 = kmemdup(&parport_device_sysctl_template, sizeof(*t), GFP_KERNEL); |
|
if (t == NULL) |
|
return -ENOMEM; |
|
|
|
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].child = t->devices_root_dir; |
|
t->devices_root_dir[0].child = t->device_dir; |
|
|
|
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) |
|
{ |
|
int ret; |
|
|
|
parport_default_sysctl_table.sysctl_header = |
|
register_sysctl_table(parport_default_sysctl_table.dev_dir); |
|
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)
|
|
|