Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 623 insertions, 0 deletions

diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c
new file mode 100644
index 000000000..d740eba3c
--- /dev/null
+++ b/drivers/parport/procfs.c
@@ -0,0 +1,623 @@
+// SPDX-License-Identifier: GPL-2.0
+/* 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 <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)