patch-2.1.73 linux/drivers/sgi/char/streamable.c

• Lines: 364
• Date: Wed Dec 10 10:31:11 1997
• Orig file: v2.1.72/linux/drivers/sgi/char/streamable.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.72/linux/drivers/sgi/char/streamable.c linux/drivers/sgi/char/streamable.c
@@ -0,0 +1,363 @@
+/*
+ * streamable.c: streamable devices. /dev/gfx
+ * (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ *
+ * Major 10 is the streams clone device.  The IRIX Xsgi server just
+ * opens /dev/gfx and closes it inmediately.
+ *
+ */
+
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/sched.h>
+#include <linux/kbd_kern.h>
+#include <linux/vt_kern.h>
+#include <asm/uaccess.h>
+#include <asm/shmiq.h>
+#include <asm/keyboard.h>
+#include "graphics.h"
+
+
+extern struct kbd_struct kbd_table [MAX_NR_CONSOLES];
+
+/* console number where forwarding is enabled */
+int forward_chars;
+
+/* To which shmiq this keyboard is assigned */
+int kbd_assigned_device;
+
+/* previous kbd_mode for the forward_chars terminal */
+int kbd_prev_mode;
+
+/* Fetchs the strioctl information from user space for I_STR ioctls */
+int
+get_sioc (struct strioctl *sioc, unsigned long arg)
+{
+	int v;
+	
+	v = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct strioctl));
+	if (v)
+		return v;
+	if (copy_from_user (sioc, (void *) arg, sizeof (struct strioctl)))
+		return -EFAULT;
+		
+	v = verify_area (VERIFY_WRITE, (void *) sioc->ic_dp, sioc->ic_len);
+	if (v)
+		return v;
+	return 0;
+}
+
+/* /dev/gfx device */
+static int
+sgi_gfx_open (struct inode *inode, struct file *file)
+{
+	printk ("GFX: Opened by %d\n", current->pid);
+	return 0;
+}
+
+static int
+sgi_gfx_close (struct inode *inode, struct file *file)
+{
+	printk ("GFX: Closed by %d\n", current->pid);
+	return 0;
+}
+
+static int
+sgi_gfx_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	printk ("GFX: ioctl 0x%x %ld called\n", cmd, arg);
+	return 0;
+	return -EINVAL;
+}
+
+struct file_operations sgi_gfx_fops = {
+	NULL,			/* llseek */
+	NULL,			/* read */
+	NULL,			/* write */
+	NULL,			/* readdir */
+	NULL,			/* poll */
+	sgi_gfx_ioctl,		/* ioctl */
+	NULL,			/* mmap */
+	sgi_gfx_open,		/* open */
+	sgi_gfx_close,		/* release */
+	NULL,			/* fsync */
+	NULL,			/* check_media_change */
+	NULL,			/* revalidate */
+	NULL			/* lock */
+};
+ 
+static struct miscdevice dev_gfx = {
+	SGI_GFX_MINOR, "sgi-gfx", &sgi_gfx_fops
+};
+
+/* /dev/input/keyboard streams device */
+static idevDesc sgi_kbd_desc = {
+        "keyboard",             /* devName */
+        "KEYBOARD",             /* devType */
+        240,                    /* nButtons */
+        0,                      /* nValuators */
+        0,                      /* nLEDs */
+        0,                      /* nStrDpys */
+        0,                      /* nIntDpys */
+        0,                      /* nBells */
+	IDEV_HAS_KEYMAP | IDEV_HAS_PCKBD
+};
+
+static int
+sgi_kbd_sioc (idevInfo *dinfo, int cmd, int size, char *data, int *found)
+{
+	*found = 1;
+	
+	switch (cmd){
+
+	case IDEVINITDEVICE:
+		return 0;
+			
+	case IDEVGETDEVICEDESC:
+		if (size >= sizeof (idevDesc)){
+			if (copy_to_user (data, &sgi_kbd_desc, sizeof (sgi_kbd_desc)))
+				return -EFAULT;
+			return 0;
+		}
+		return -EINVAL;
+
+	case IDEVGETKEYMAPDESC:
+		if (size >= sizeof (idevKeymapDesc)){
+			if (copy_to_user (data, "US", 3))
+				return -EFAULT;
+			return 0;
+		}
+		return -EINVAL;
+	}
+	*found = 0;
+	return -EINVAL;
+}
+
+static int
+sgi_keyb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct strioctl sioc;
+	int    f, v;
+	
+	/* IRIX calls I_PUSH on the opened device, go figure */
+	if (cmd == I_PUSH)
+		return 0;
+
+	if (cmd == I_STR){
+		v = get_sioc (&sioc, arg);
+		if (v)
+			return v;
+
+		/* Why like this?  Because this is a sample piece of code
+		 * that can be copied into other drivers and shows how to
+		 * call a stock IRIX xxx_wioctl routine
+		 *
+		 * The NULL is supposed to be a idevInfo, right now we
+		 * do not support this in our kernel.  
+		 */
+		return sgi_kbd_sioc (NULL, sioc.ic_cmd, sioc.ic_len, sioc.ic_dp, &f);
+	}
+	
+	if (cmd == SHMIQ_ON){
+		kbd_assigned_device = arg;
+		forward_chars = fg_console + 1;
+		kbd_prev_mode = kbd_table [fg_console].kbdmode;
+		
+	        kbd_table [fg_console].kbdmode = VC_RAW;
+	} else if (cmd == SHMIQ_OFF && forward_chars){
+		kbd_table [forward_chars-1].kbdmode = kbd_prev_mode;
+		forward_chars = 0;
+	} else
+		return -EINVAL;
+	return 0;
+}
+
+void
+kbd_forward_char (int ch)
+{
+	static struct shmqevent ev;
+
+	ev.data.flags  = (ch & 0200) ? 0 : 1;
+	ev.data.which  = ch;
+	ev.data.device = kbd_assigned_device + 0x11;
+	shmiq_push_event (&ev);
+}
+
+static int
+sgi_keyb_open (struct inode *inode, struct file *file)
+{
+	/* Nothing, but required by the misc driver */
+	return 0;
+}
+
+struct file_operations sgi_keyb_fops = {
+	NULL,			/* llseek */
+	NULL,			/* read */
+	NULL,			/* write */
+	NULL,			/* readdir */
+	NULL,			/* poll */
+	sgi_keyb_ioctl,		/* ioctl */
+	NULL,			/* mmap */
+	sgi_keyb_open,		/* open */
+	NULL,			/* release */
+	NULL,			/* fsync */
+	NULL,			/* check_media_change */
+	NULL,			/* revalidate */
+	NULL			/* lock */
+};
+
+static struct miscdevice dev_input_keyboard = {
+	SGI_STREAMS_KEYBOARD, "streams-keyboard", &sgi_keyb_fops
+};
+
+/* /dev/input/mouse streams device */
+#define MOUSE_VALUATORS 2
+static idevDesc sgi_mouse_desc = {
+        "mouse",                /* devName */
+        "MOUSE",                /* devType */
+        3,                      /* nButtons */
+        MOUSE_VALUATORS,	/* nValuators */
+        0,                      /* nLEDs */
+        0,                      /* nStrDpys */
+        0,                      /* nIntDpys */
+        0,                      /* nBells */
+	0			/* flags */
+};
+
+static idevValuatorDesc mouse_default_valuator = {
+	200,			/* hwMinRes */
+        200,			/* hwMaxRes */
+        0,			/* hwMinVal */
+        65000,			/* hwMaxVal */
+        IDEV_EITHER,		/* possibleModes */
+        IDEV_ABSOLUTE,		/* default mode */
+        200,			/* resolution */
+        0,			/* minVal */
+        65000			/* maxVal */
+};
+
+static int mouse_opened;
+static idevValuatorDesc mouse_valuators [MOUSE_VALUATORS];
+	
+int
+sgi_mouse_open (struct inode *inode, struct file *file)
+{
+	int i;
+	
+	if (mouse_opened)
+		return -EBUSY;
+	
+	mouse_opened = 1;
+	for (i = 0; i < MOUSE_VALUATORS; i++)
+		mouse_valuators [i] = mouse_default_valuator;
+	return 0;
+}
+
+static int
+sgi_mouse_close (struct inode *inode, struct file *filp)
+{
+	mouse_opened = 0;
+	return 0;
+}
+
+static int
+sgi_mouse_sioc (idevInfo *dinfo, int cmd, int size, char *data, int *found)
+{
+	*found = 1;
+
+	switch (cmd){
+	case IDEVINITDEVICE:
+		return 0;
+			
+	case IDEVGETDEVICEDESC:
+		if (size >= sizeof (idevDesc)){
+			if (copy_to_user (data, &sgi_mouse_desc, sizeof (sgi_mouse_desc)))
+				return -EFAULT;
+			return 0;
+		}
+		return -EINVAL;
+
+	case IDEVGETVALUATORDESC: {
+		idevGetSetValDesc request, *ureq = (idevGetSetValDesc *) data;
+		
+		if (size < sizeof (idevGetSetValDesc))
+			return -EINVAL;
+
+		if (copy_from_user (&request, data, sizeof (request)))
+			return -EFAULT;
+		if (request.valNum >= MOUSE_VALUATORS)
+			return -EINVAL;
+		if (copy_to_user ((void *)&ureq->desc, 
+				  (void *)&mouse_valuators [request.valNum],
+				  sizeof (idevValuatorDesc)))
+			return -EFAULT;
+		return 0;
+	}
+	}
+	*found = 0;
+	return -EINVAL;
+}
+
+static int
+sgi_mouse_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct strioctl sioc;
+	int    f, v;
+
+	/* IRIX calls I_PUSH on the opened device, go figure */
+	switch (cmd){
+	case I_PUSH:
+		return 0;
+
+	case I_STR:
+		v = get_sioc (&sioc, arg);
+		if (v)
+			return v;
+		
+		/* Why like this?  Because this is a sample piece of code
+		 * that can be copied into other drivers and shows how to
+		 * call a stock IRIX xxx_wioctl routine
+		 *
+		 * The NULL is supposed to be a idevInfo, right now we
+		 * do not support this in our kernel.  
+		 */
+		return sgi_mouse_sioc (NULL, sioc.ic_cmd, sioc.ic_len, sioc.ic_dp, &f);
+		
+	case SHMIQ_ON:
+	case SHMIQ_OFF:
+		return 0;
+	}
+	return 0;
+}
+
+struct file_operations sgi_mouse_fops = {
+	NULL,			/* llseek */
+	NULL,			/* read */
+	NULL,			/* write */
+	NULL,			/* readdir */
+	NULL,			/* poll */
+	sgi_mouse_ioctl,	/* ioctl */
+	NULL,			/* mmap */
+	sgi_mouse_open,		/* open */
+	sgi_mouse_close,	/* release */
+	NULL,			/* fsync */
+	NULL,			/* check_media_change */
+	NULL,			/* revalidate */
+	NULL			/* lock */
+};
+
+/* /dev/input/mouse */
+static struct miscdevice dev_input_mouse = {
+	SGI_STREAMS_KEYBOARD, "streams-mouse", &sgi_mouse_fops
+};
+
+void
+streamable_init (void)
+{
+	printk ("streamable misc devices registered (keyb:%d, gfx:%d)\n",
+		SGI_STREAMS_KEYBOARD, SGI_GFX_MINOR);
+	
+	misc_register (&dev_gfx);
+	misc_register (&dev_input_keyboard);
+	misc_register (&dev_input_mouse);
+}