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path: root/drivers/parport/procfs.c
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-rw-r--r--drivers/parport/procfs.c533
1 files changed, 533 insertions, 0 deletions
diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c
new file mode 100644
index 0000000..cbe1718
--- /dev/null
+++ b/drivers/parport/procfs.c
@@ -0,0 +1,533 @@
+/* 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/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)
generated by cgit v1.1 at 2024-10-30 09:36:10 +0000