From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/parport/procfs.c | 608 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 608 insertions(+) create mode 100644 drivers/parport/procfs.c (limited to 'drivers/parport/procfs.c') diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c new file mode 100644 index 000000000..3b470801a --- /dev/null +++ b/drivers/parport/procfs.c @@ -0,0 +1,608 @@ +/* Sysctl interface for parport devices. + * + * Authors: David Campbell + * Tim Waugh + * Philip Blundell + * Andrea Arcangeli + * Riccardo Facchetti + * + * based on work by Grant Guenther + * and Philip Blundell + * + * Cleaned up include files - Russell King + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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 __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(struct ctl_table *table, int write, + 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(struct ctl_table *table, int write, + 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(struct ctl_table *table, int write, + 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(struct ctl_table *table, int write, + 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(struct ctl_table *table, int write, + 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) { .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) +{ + parport_default_sysctl_table.sysctl_header = + register_sysctl_table(parport_default_sysctl_table.dev_dir); + 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) -- cgit v1.2.3-54-g00ecf