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