patch-2.1.47 linux/drivers/misc/parport_procfs.c

• Lines: 342
• Date: Wed Jul 23 11:14:30 1997
• Orig file: v2.1.46/linux/drivers/misc/parport_procfs.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.46/linux/drivers/misc/parport_procfs.c linux/drivers/misc/parport_procfs.c
@@ -0,0 +1,341 @@
+/* $Id: parport_procfs.c,v 1.1.2.2 1997/04/18 15:00:52 phil Exp $
+ * Parallel port /proc interface code.
+ * 
+ * Authors: David Campbell <campbell@tirian.che.curtin.edu.au>
+ *          Tim Waugh <tmw20@cam.ac.uk>
+ *
+ * based on work by Grant Guenther <grant@torque.net>
+ *              and Philip Blundell <Philip.Blundell@pobox.com>
+ */
+
+#include <linux/tasks.h>
+#include <asm/ptrace.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include <linux/config.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/malloc.h>
+
+#include <linux/proc_fs.h>
+
+#include <linux/parport.h>
+
+#undef PARPORT_INCLUDE_BENCH
+
+struct proc_dir_entry *base=NULL;
+
+extern void parport_null_intr_func(int irq, void *dev_id, struct pt_regs *regs);
+
+static int irq_write_proc(struct file *file, const char *buffer,
+					  unsigned long count, void *data)
+{
+	int newirq;
+	struct parport *pp = (struct parport *)data;
+	
+	if (count > 4 )  /* more than 4 digits for a irq 0x?? 0?? ??  */
+		return(-EOVERFLOW);
+
+	if (buffer[0] < 32 || !strncmp(buffer, "none", 4)) {
+		newirq = PARPORT_IRQ_NONE;
+	} else {
+		if (buffer[0] == '0') {
+			if( buffer[1] == 'x' )
+				newirq = simple_strtoul(&buffer[2],0,16);
+			else
+				newirq = simple_strtoul(&buffer[1],0,8);
+		} else {
+			newirq = simple_strtoul(buffer,0,10);
+		}
+	}
+
+	if (pp->irq != PARPORT_IRQ_NONE && !(pp->flags & PARPORT_FLAG_COMA)) 
+		free_irq(pp->irq, pp);
+
+	pp->irq = newirq;
+
+	if (pp->irq != PARPORT_IRQ_NONE && !(pp->flags & PARPORT_FLAG_COMA)) { 
+		struct pardevice *pd = pp->cad;
+
+		if (pd == NULL) {
+			pd = pp->devices;
+			if (pd != NULL) 
+				request_irq(pp->irq, pd->irq_func ? 
+					    pd->irq_func :
+					    parport_null_intr_func,
+					    SA_INTERRUPT, pd->name, pd->port);
+		} else {
+			request_irq(pp->irq, pd->irq_func ? pd->irq_func :
+				    parport_null_intr_func,
+				    SA_INTERRUPT, pp->name, pd->port);
+		}
+	}
+
+	return count;
+}
+
+static int irq_read_proc(char *page, char **start, off_t off,
+					 int count, int *eof, void *data)
+{
+	struct parport *pp = (struct parport *)data;
+	int len;
+	
+	if (pp->irq == PARPORT_IRQ_NONE)
+		len = sprintf(page, "none\n");
+	else
+		len = sprintf(page, "%d\n", pp->irq);
+	
+	*start = 0;
+	*eof   = 1;
+	return len;
+}
+
+static int devices_read_proc(char *page, char **start, off_t off,
+					 int count, int *eof, void *data)
+{
+	struct parport *pp = (struct parport *)data;
+	struct pardevice *pd1;
+	int len=0;
+
+	for (pd1 = pp->devices; pd1 ; pd1 = pd1->next) {
+		if (pd1 == pp->cad)
+			len += sprintf(page+len, "+");
+		else
+			len += sprintf(page+len, " ");
+
+		len += sprintf(page+len, "%s",pd1->name);
+
+		if (pd1 == pp->lurker)
+			len += sprintf(page+len, " LURK");
+		
+		len += sprintf(page+len,"\n");
+	}
+		
+	*start = 0;
+	*eof   = 1;
+	return len;
+}
+
+static int hardware_read_proc(char *page, char **start, off_t off,
+							  int count, int *eof, void *data)
+{
+	struct parport *pp = (struct parport *)data;
+	int len=0;
+	
+	len += sprintf(page+len, "base:\t0x%x\n",pp->base);
+	if (pp->irq == PARPORT_IRQ_NONE)
+		len += sprintf(page+len, "irq:\tnone\n");
+	else
+		len += sprintf(page+len, "irq:\t%d\n",pp->irq);
+	len += sprintf(page+len, "dma:\t%d\n",pp->dma);
+
+
+#if 0
+	len += sprintf(page+len, "modes:\t");
+	{
+#define printmode(x) {if(pp->modes&PARPORT_MODE_##x){len+=sprintf(page+len,"%s%s",f?",":"",#x);f++;}}
+		int f = 0;
+		printmode(SPP);
+		printmode(PS2);
+		printmode(EPP);
+		printmode(ECP);
+		printmode(ECPEPP);
+		printmode(ECPPS2);
+#undef printmode
+	}
+	len += sprintf(page+len, "\n");
+
+	len += sprintf(page+len, "mode:\t");
+	if (pp->modes & PARPORT_MODE_ECR) {
+		switch (r_ecr(pp) >> 5) {
+		case 0:
+			len += sprintf(page+len, "SPP");
+			if( pp->modes & PARPORT_MODE_PS2 )
+				len += sprintf(page+len, ",PS2");
+			if( pp->modes & PARPORT_MODE_EPP )
+				len += sprintf(page+len, ",EPP");
+			break;
+		case 1:
+			len += sprintf(page+len, "ECPPS2");
+			break;
+		case 2:
+			len += sprintf(page+len, "DATAFIFO");
+			break;
+		case 3:
+			len += sprintf(page+len, "ECP");
+			break;
+		case 4:
+			len += sprintf(page+len, "ECPEPP");
+			break;
+		case 5:
+			len += sprintf(page+len, "Reserved?");
+			break;
+		case 6:
+			len += sprintf(page+len, "TEST");
+			break;
+		case 7:
+			len += sprintf(page+len, "Configuration");
+			break;
+		}
+	} else {
+		len += sprintf(page+len, "SPP");
+		if (pp->modes & PARPORT_MODE_PS2)
+			len += sprintf(page+len, ",PS2");
+		if (pp->modes & PARPORT_MODE_EPP)
+			len += sprintf(page+len, ",EPP");
+	}
+	len += sprintf(page+len, "\n");
+#endif	
+#if 0
+	/* Now no detection, please fix with an external function */
+	len += sprintf(page+len, "chipset:\tunknown\n");
+#endif
+#ifdef PARPORT_INCLUDE_BENCHMARK
+	if (pp->speed)
+		len += sprintf(page+len, "bench:\t%d Bytes/s\n",pp->speed);
+	else
+		len += sprintf(page+len, "bench:\tunknown\n");
+#endif	
+
+	*start = 0;
+	*eof   = 1;
+	return len;
+}
+
+static struct proc_dir_entry *new_proc_entry(const char *name, mode_t mode,
+					     struct proc_dir_entry *parent,
+					     unsigned short ino)
+{
+	struct proc_dir_entry *ent;
+
+	ent = kmalloc(sizeof(struct proc_dir_entry), GFP_KERNEL);
+	if (!ent)
+		return NULL;
+	memset(ent, 0, sizeof(struct proc_dir_entry));
+	
+	if (mode == S_IFDIR)
+		mode |= S_IRUGO | S_IXUGO;
+	else if (mode == 0)
+		mode = S_IFREG | S_IRUGO;
+
+
+	ent->low_ino = ino;
+	ent->name = name;
+	ent->namelen = strlen(name);
+	ent->mode = mode;
+	if (S_ISDIR(mode)) 
+		ent->nlink = 2;
+	else
+		ent->nlink = 1;
+
+	proc_register(parent, ent);
+	
+	return ent;
+}
+
+
+int parport_proc_init()
+{
+	base = new_proc_entry("parport", S_IFDIR, &proc_root,PROC_PARPORT);
+
+	if (base)
+		return 1;
+	else {
+		printk(KERN_ERR "parport: Error creating proc entry /proc/parport\n");
+		return 0;
+	}
+}
+
+int parport_proc_cleanup()
+{
+	if (base)
+		proc_unregister(&proc_root,base->low_ino);
+
+	base = NULL;
+	
+	return 0;
+}
+
+int parport_proc_register(struct parport *pp)
+{
+	struct proc_dir_entry *ent;
+	static int conta=0;
+	char *name;
+
+	memset(&pp->pdir,0,sizeof(struct parport_dir));
+
+	if (!base) {
+		printk(KERN_ERR "parport: Error entry /proc/parport, not generated?\n");
+		return 1;
+	}
+	
+	name = pp->pdir.name;
+	sprintf(name,"%d",conta++);
+
+	ent = new_proc_entry(name, S_IFDIR, base,0);
+	if (!ent) {
+		printk(KERN_ERR "parport: Error registering proc_entry /proc/%s\n",name);
+		return 1;
+	}
+	pp->pdir.entry = ent;
+
+	ent = new_proc_entry("irq", S_IFREG | S_IRUGO | S_IWUSR, pp->pdir.entry,0);
+	if (!ent) {
+		printk(KERN_ERR "parport: Error registering proc_entry /proc/%s/irq\n",name);
+		return 1;
+	}
+	ent->read_proc = irq_read_proc;
+	ent->write_proc= irq_write_proc;
+	ent->data      = pp;
+	pp->pdir.irq   = ent;
+	
+	ent = new_proc_entry("devices", 0, pp->pdir.entry,0);
+	if (!ent) {
+		printk(KERN_ERR "parport: Error registering proc_entry /proc/%s/devices\n",name);
+		return 1;
+	}
+	ent->read_proc   = devices_read_proc;
+	ent->data        = pp;
+	pp->pdir.devices = ent;
+	
+	ent = new_proc_entry("hardware", 0, pp->pdir.entry,0);
+	if (!ent) {
+		printk(KERN_ERR "parport: Error registering proc_entry /proc/%s/hardware\n",name);
+		return 1;
+	}
+	ent->read_proc    = hardware_read_proc;
+	ent->data         = pp;
+	pp->pdir.hardware = ent;
+	return 0;
+}
+
+int parport_proc_unregister(struct parport *pp)
+{
+	if (pp->pdir.entry) {
+		if (pp->pdir.irq) {
+			proc_unregister(pp->pdir.entry, pp->pdir.irq->low_ino);
+			kfree(pp->pdir.irq);
+		}
+		
+		if (pp->pdir.devices) {
+			proc_unregister(pp->pdir.entry,
+					pp->pdir.devices->low_ino);
+			kfree(pp->pdir.devices);
+		}
+		
+		if (pp->pdir.hardware) {
+			proc_unregister(pp->pdir.entry,
+					pp->pdir.hardware->low_ino);
+			kfree(pp->pdir.hardware);
+		}
+		
+		proc_unregister(base, pp->pdir.entry->low_ino);
+		kfree(pp->pdir.entry);
+	}
+	
+	return 0;
+}