procfs.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:12k
- /* 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, "%sn", dev->name);
- }
- }
- if(!len) {
- len += sprintf(buffer, "%sn", "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, "%lut%lun", 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, "%dn", 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, "%dn", 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