patch-2.3.18 linux/drivers/sbus/char/uctrl.c

• Lines: 156
• Date: Wed Sep 8 11:14:32 1999
• Orig file: v2.3.17/linux/drivers/sbus/char/uctrl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.17/linux/drivers/sbus/char/uctrl.c linux/drivers/sbus/char/uctrl.c
@@ -0,0 +1,155 @@
+/* $Id: uctrl.c,v 1.2 1999/09/07 23:11:08 shadow Exp $
+ * uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
+ *
+ * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/sbus.h>
+
+#define UCTRL_MINOR	174
+
+struct uctrl_driver {
+	volatile u32 *regs;
+	int irq;
+};
+
+static struct uctrl_driver drv;
+
+static loff_t
+uctrl_llseek(struct file *file, loff_t offset, int type)
+{
+	return -ESPIPE;
+}
+
+static int
+uctrl_ioctl(struct inode *inode, struct file *file,
+	      unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+		default:
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static int
+uctrl_open(struct inode *inode, struct file *file)
+{
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int
+uctrl_release(struct inode *inode, struct file *file)
+{
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+void uctrl_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct uctrl_driver *driver = (struct uctrl_driver *)dev_id;
+	printk("in uctrl_interrupt\n");
+}
+
+static struct file_operations uctrl_fops = {
+	uctrl_llseek,
+	NULL,           /* read */
+	NULL,           /* write */
+	NULL,		/* readdir */
+	NULL,		/* poll */	
+	uctrl_ioctl,
+	NULL,		/* mmap */
+	uctrl_open,
+	NULL,		/* flush */
+	uctrl_release
+};
+
+static struct miscdevice uctrl_dev = {
+	UCTRL_MINOR,
+	"uctrl",
+	&uctrl_fops
+};
+
+#ifdef MODULE
+int init_module(void)
+#else
+__initfunc(int uctrl_init(void))
+#endif
+{
+	struct uctrl_driver *driver = &drv;
+	int len;
+	struct linux_prom_irqs tmp_irq[2];
+        unsigned int vaddr[2] = { 0, 0 };
+	int tmpnode, uctrlnode = prom_getchild(prom_root_node);
+
+	tmpnode = prom_searchsiblings(uctrlnode, "obio");
+
+	if (tmpnode)
+	  uctrlnode = prom_getchild(tmpnode);
+
+	uctrlnode = prom_searchsiblings(uctrlnode, "uctrl");
+
+	if (!uctrlnode)
+		return -ENODEV;
+
+	/* the prom mapped it for us */
+	len = prom_getproperty(uctrlnode, "address", (void *) vaddr,
+			       sizeof(vaddr));
+	driver->regs = vaddr[0];
+
+	len = prom_getproperty(uctrlnode, "intr", (char *) tmp_irq,
+			       sizeof(tmp_irq));
+	if(!driver->irq) 
+		driver->irq = tmp_irq[0].pri;
+
+	request_irq(driver->irq, uctrl_interrupt, 0, 
+		    "uctrl", driver);
+
+	enable_irq(driver->irq);
+
+	if (misc_register(&uctrl_dev)) {
+		printk("%s: unable to get misc minor %d\n",
+		       __FUNCTION__, uctrl_dev.minor);
+		disable_irq(driver->irq);
+		free_irq(driver->irq, driver);
+		return -ENODEV;
+	}
+
+	printk(KERN_INFO, "uctrl: 0x%x (irq %d)\n", driver->regs, __irq_itoa(driver->irq));
+        return 0;
+}
+
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	struct uctrl_driver *driver = &drv;
+
+	misc_deregister(&uctrl_dev);
+	if (driver->irq) {
+		disable_irq(driver->irq);
+		free_irq(driver->irq, driver);
+	}
+	if (driver->regs)
+		driver->regs = 0;
+}
+#endif