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Diffstat (limited to 'drivers/input/mouse/vsxxxaa.c')
-rw-r--r--drivers/input/mouse/vsxxxaa.c591
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diff --git a/drivers/input/mouse/vsxxxaa.c b/drivers/input/mouse/vsxxxaa.c
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index 00000000000..b2cb101c811
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+++ b/drivers/input/mouse/vsxxxaa.c
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+/*
+ * Driver for DEC VSXXX-AA mouse (hockey-puck mouse, ball or two rollers)
+ * DEC VSXXX-GA mouse (rectangular mouse, with ball)
+ * DEC VSXXX-AB tablet (digitizer with hair cross or stylus)
+ *
+ * Copyright (C) 2003-2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
+ *
+ * The packet format was initially taken from a patch to GPM which is (C) 2001
+ * by Karsten Merker <merker@linuxtag.org>
+ * and Maciej W. Rozycki <macro@ds2.pg.gda.pl>
+ * Later on, I had access to the device's documentation (referenced below).
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * Building an adaptor to DE9 / DB25 RS232
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * DISCLAIMER: Use this description AT YOUR OWN RISK! I'll not pay for
+ * anything if you break your mouse, your computer or whatever!
+ *
+ * In theory, this mouse is a simple RS232 device. In practice, it has got
+ * a quite uncommon plug and the requirement to additionally get a power
+ * supply at +5V and -12V.
+ *
+ * If you look at the socket/jack (_not_ at the plug), we use this pin
+ * numbering:
+ * _______
+ * / 7 6 5 \
+ * | 4 --- 3 |
+ * \ 2 1 /
+ * -------
+ *
+ * DEC socket DE9 DB25 Note
+ * 1 (GND) 5 7 -
+ * 2 (RxD) 2 3 -
+ * 3 (TxD) 3 2 -
+ * 4 (-12V) - - Somewhere from the PSU. At ATX, it's
+ * the thin blue wire at pin 12 of the
+ * ATX power connector. Only required for
+ * VSXXX-AA/-GA mice.
+ * 5 (+5V) - - PSU (red wires of ATX power connector
+ * on pin 4, 6, 19 or 20) or HDD power
+ * connector (also red wire).
+ * 6 (+12V) - - HDD power connector, yellow wire. Only
+ * required for VSXXX-AB digitizer.
+ * 7 (dev. avail.) - - The mouse shorts this one to pin 1.
+ * This way, the host computer can detect
+ * the mouse. To use it with the adaptor,
+ * simply don't connect this pin.
+ *
+ * So to get a working adaptor, you need to connect the mouse with three
+ * wires to a RS232 port and two or three additional wires for +5V, +12V and
+ * -12V to the PSU.
+ *
+ * Flow specification for the link is 4800, 8o1.
+ *
+ * The mice and tablet are described in "VCB02 Video Subsystem - Technical
+ * Manual", DEC EK-104AA-TM-001. You'll find it at MANX, a search engine
+ * specific for DEC documentation. Try
+ * http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
+ */
+
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/config.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+#define DRIVER_DESC "Driver for DEC VSXXX-AA and -GA mice and VSXXX-AB tablet"
+
+MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
+MODULE_DESCRIPTION (DRIVER_DESC);
+MODULE_LICENSE ("GPL");
+
+#undef VSXXXAA_DEBUG
+#ifdef VSXXXAA_DEBUG
+#define DBG(x...) printk (x)
+#else
+#define DBG(x...) do {} while (0)
+#endif
+
+#define VSXXXAA_INTRO_MASK 0x80
+#define VSXXXAA_INTRO_HEAD 0x80
+#define IS_HDR_BYTE(x) (((x) & VSXXXAA_INTRO_MASK) \
+ == VSXXXAA_INTRO_HEAD)
+
+#define VSXXXAA_PACKET_MASK 0xe0
+#define VSXXXAA_PACKET_REL 0x80
+#define VSXXXAA_PACKET_ABS 0xc0
+#define VSXXXAA_PACKET_POR 0xa0
+#define MATCH_PACKET_TYPE(data, type) (((data) & VSXXXAA_PACKET_MASK) == (type))
+
+
+
+struct vsxxxaa {
+ struct input_dev dev;
+ struct serio *serio;
+#define BUFLEN 15 /* At least 5 is needed for a full tablet packet */
+ unsigned char buf[BUFLEN];
+ unsigned char count;
+ unsigned char version;
+ unsigned char country;
+ unsigned char type;
+ char name[64];
+ char phys[32];
+};
+
+static void
+vsxxxaa_drop_bytes (struct vsxxxaa *mouse, int num)
+{
+ if (num >= mouse->count)
+ mouse->count = 0;
+ else {
+ memmove (mouse->buf, mouse->buf + num - 1, BUFLEN - num);
+ mouse->count -= num;
+ }
+}
+
+static void
+vsxxxaa_queue_byte (struct vsxxxaa *mouse, unsigned char byte)
+{
+ if (mouse->count == BUFLEN) {
+ printk (KERN_ERR "%s on %s: Dropping a byte of full buffer.\n",
+ mouse->name, mouse->phys);
+ vsxxxaa_drop_bytes (mouse, 1);
+ }
+ DBG (KERN_INFO "Queueing byte 0x%02x\n", byte);
+
+ mouse->buf[mouse->count++] = byte;
+}
+
+static void
+vsxxxaa_detection_done (struct vsxxxaa *mouse)
+{
+ switch (mouse->type) {
+ case 0x02:
+ sprintf (mouse->name, "DEC VSXXX-AA/-GA mouse");
+ break;
+
+ case 0x04:
+ sprintf (mouse->name, "DEC VSXXX-AB digitizer");
+ break;
+
+ default:
+ sprintf (mouse->name, "unknown DEC pointer device "
+ "(type = 0x%02x)", mouse->type);
+ break;
+ }
+
+ printk (KERN_INFO "Found %s version 0x%02x from country 0x%02x "
+ "on port %s\n", mouse->name, mouse->version,
+ mouse->country, mouse->phys);
+}
+
+/*
+ * Returns number of bytes to be dropped, 0 if packet is okay.
+ */
+static int
+vsxxxaa_check_packet (struct vsxxxaa *mouse, int packet_len)
+{
+ int i;
+
+ /* First byte must be a header byte */
+ if (!IS_HDR_BYTE (mouse->buf[0])) {
+ DBG ("vsck: len=%d, 1st=0x%02x\n", packet_len, mouse->buf[0]);
+ return 1;
+ }
+
+ /* Check all following bytes */
+ if (packet_len > 1) {
+ for (i = 1; i < packet_len; i++) {
+ if (IS_HDR_BYTE (mouse->buf[i])) {
+ printk (KERN_ERR "Need to drop %d bytes "
+ "of a broken packet.\n",
+ i - 1);
+ DBG (KERN_INFO "check: len=%d, b[%d]=0x%02x\n",
+ packet_len, i, mouse->buf[i]);
+ return i - 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static __inline__ int
+vsxxxaa_smells_like_packet (struct vsxxxaa *mouse, unsigned char type, size_t len)
+{
+ return (mouse->count >= len) && MATCH_PACKET_TYPE (mouse->buf[0], type);
+}
+
+static void
+vsxxxaa_handle_REL_packet (struct vsxxxaa *mouse, struct pt_regs *regs)
+{
+ struct input_dev *dev = &mouse->dev;
+ unsigned char *buf = mouse->buf;
+ int left, middle, right;
+ int dx, dy;
+
+ /*
+ * Check for normal stream packets. This is three bytes,
+ * with the first byte's 3 MSB set to 100.
+ *
+ * [0]: 1 0 0 SignX SignY Left Middle Right
+ * [1]: 0 dx dx dx dx dx dx dx
+ * [2]: 0 dy dy dy dy dy dy dy
+ */
+
+ /*
+ * Low 7 bit of byte 1 are abs(dx), bit 7 is
+ * 0, bit 4 of byte 0 is direction.
+ */
+ dx = buf[1] & 0x7f;
+ dx *= ((buf[0] >> 4) & 0x01)? 1: -1;
+
+ /*
+ * Low 7 bit of byte 2 are abs(dy), bit 7 is
+ * 0, bit 3 of byte 0 is direction.
+ */
+ dy = buf[2] & 0x7f;
+ dy *= ((buf[0] >> 3) & 0x01)? -1: 1;
+
+ /*
+ * Get button state. It's the low three bits
+ * (for three buttons) of byte 0.
+ */
+ left = (buf[0] & 0x04)? 1: 0;
+ middle = (buf[0] & 0x02)? 1: 0;
+ right = (buf[0] & 0x01)? 1: 0;
+
+ vsxxxaa_drop_bytes (mouse, 3);
+
+ DBG (KERN_INFO "%s on %s: dx=%d, dy=%d, buttons=%s%s%s\n",
+ mouse->name, mouse->phys, dx, dy,
+ left? "L": "l", middle? "M": "m", right? "R": "r");
+
+ /*
+ * Report what we've found so far...
+ */
+ input_regs (dev, regs);
+ input_report_key (dev, BTN_LEFT, left);
+ input_report_key (dev, BTN_MIDDLE, middle);
+ input_report_key (dev, BTN_RIGHT, right);
+ input_report_key (dev, BTN_TOUCH, 0);
+ input_report_rel (dev, REL_X, dx);
+ input_report_rel (dev, REL_Y, dy);
+ input_sync (dev);
+}
+
+static void
+vsxxxaa_handle_ABS_packet (struct vsxxxaa *mouse, struct pt_regs *regs)
+{
+ struct input_dev *dev = &mouse->dev;
+ unsigned char *buf = mouse->buf;
+ int left, middle, right, touch;
+ int x, y;
+
+ /*
+ * Tablet position / button packet
+ *
+ * [0]: 1 1 0 B4 B3 B2 B1 Pr
+ * [1]: 0 0 X5 X4 X3 X2 X1 X0
+ * [2]: 0 0 X11 X10 X9 X8 X7 X6
+ * [3]: 0 0 Y5 Y4 Y3 Y2 Y1 Y0
+ * [4]: 0 0 Y11 Y10 Y9 Y8 Y7 Y6
+ */
+
+ /*
+ * Get X/Y position. Y axis needs to be inverted since VSXXX-AB
+ * counts down->top while monitor counts top->bottom.
+ */
+ x = ((buf[2] & 0x3f) << 6) | (buf[1] & 0x3f);
+ y = ((buf[4] & 0x3f) << 6) | (buf[3] & 0x3f);
+ y = 1023 - y;
+
+ /*
+ * Get button state. It's bits <4..1> of byte 0.
+ */
+ left = (buf[0] & 0x02)? 1: 0;
+ middle = (buf[0] & 0x04)? 1: 0;
+ right = (buf[0] & 0x08)? 1: 0;
+ touch = (buf[0] & 0x10)? 1: 0;
+
+ vsxxxaa_drop_bytes (mouse, 5);
+
+ DBG (KERN_INFO "%s on %s: x=%d, y=%d, buttons=%s%s%s%s\n",
+ mouse->name, mouse->phys, x, y,
+ left? "L": "l", middle? "M": "m",
+ right? "R": "r", touch? "T": "t");
+
+ /*
+ * Report what we've found so far...
+ */
+ input_regs (dev, regs);
+ input_report_key (dev, BTN_LEFT, left);
+ input_report_key (dev, BTN_MIDDLE, middle);
+ input_report_key (dev, BTN_RIGHT, right);
+ input_report_key (dev, BTN_TOUCH, touch);
+ input_report_abs (dev, ABS_X, x);
+ input_report_abs (dev, ABS_Y, y);
+ input_sync (dev);
+}
+
+static void
+vsxxxaa_handle_POR_packet (struct vsxxxaa *mouse, struct pt_regs *regs)
+{
+ struct input_dev *dev = &mouse->dev;
+ unsigned char *buf = mouse->buf;
+ int left, middle, right;
+ unsigned char error;
+
+ /*
+ * Check for Power-On-Reset packets. These are sent out
+ * after plugging the mouse in, or when explicitely
+ * requested by sending 'T'.
+ *
+ * [0]: 1 0 1 0 R3 R2 R1 R0
+ * [1]: 0 M2 M1 M0 D3 D2 D1 D0
+ * [2]: 0 E6 E5 E4 E3 E2 E1 E0
+ * [3]: 0 0 0 0 0 Left Middle Right
+ *
+ * M: manufacturer location code
+ * R: revision code
+ * E: Error code. If it's in the range of 0x00..0x1f, only some
+ * minor problem occured. Errors >= 0x20 are considered bad
+ * and the device may not work properly...
+ * D: <0010> == mouse, <0100> == tablet
+ */
+
+ mouse->version = buf[0] & 0x0f;
+ mouse->country = (buf[1] >> 4) & 0x07;
+ mouse->type = buf[1] & 0x0f;
+ error = buf[2] & 0x7f;
+
+ /*
+ * Get button state. It's the low three bits
+ * (for three buttons) of byte 0. Maybe even the bit <3>
+ * has some meaning if a tablet is attached.
+ */
+ left = (buf[0] & 0x04)? 1: 0;
+ middle = (buf[0] & 0x02)? 1: 0;
+ right = (buf[0] & 0x01)? 1: 0;
+
+ vsxxxaa_drop_bytes (mouse, 4);
+ vsxxxaa_detection_done (mouse);
+
+ if (error <= 0x1f) {
+ /* No (serious) error. Report buttons */
+ input_regs (dev, regs);
+ input_report_key (dev, BTN_LEFT, left);
+ input_report_key (dev, BTN_MIDDLE, middle);
+ input_report_key (dev, BTN_RIGHT, right);
+ input_report_key (dev, BTN_TOUCH, 0);
+ input_sync (dev);
+
+ if (error != 0)
+ printk (KERN_INFO "Your %s on %s reports error=0x%02x\n",
+ mouse->name, mouse->phys, error);
+
+ }
+
+ /*
+ * If the mouse was hot-plugged, we need to force differential mode
+ * now... However, give it a second to recover from it's reset.
+ */
+ printk (KERN_NOTICE "%s on %s: Forceing standard packet format, "
+ "incremental streaming mode and 72 samples/sec\n",
+ mouse->name, mouse->phys);
+ mouse->serio->write (mouse->serio, 'S'); /* Standard format */
+ mdelay (50);
+ mouse->serio->write (mouse->serio, 'R'); /* Incremental */
+ mdelay (50);
+ mouse->serio->write (mouse->serio, 'L'); /* 72 samples/sec */
+}
+
+static void
+vsxxxaa_parse_buffer (struct vsxxxaa *mouse, struct pt_regs *regs)
+{
+ unsigned char *buf = mouse->buf;
+ int stray_bytes;
+
+ /*
+ * Parse buffer to death...
+ */
+ do {
+ /*
+ * Out of sync? Throw away what we don't understand. Each
+ * packet starts with a byte whose bit 7 is set. Unhandled
+ * packets (ie. which we don't know about or simply b0rk3d
+ * data...) will get shifted out of the buffer after some
+ * activity on the mouse.
+ */
+ while (mouse->count > 0 && !IS_HDR_BYTE(buf[0])) {
+ printk (KERN_ERR "%s on %s: Dropping a byte to regain "
+ "sync with mouse data stream...\n",
+ mouse->name, mouse->phys);
+ vsxxxaa_drop_bytes (mouse, 1);
+ }
+
+ /*
+ * Check for packets we know about.
+ */
+
+ if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_REL, 3)) {
+ /* Check for broken packet */
+ stray_bytes = vsxxxaa_check_packet (mouse, 3);
+ if (stray_bytes > 0) {
+ printk (KERN_ERR "Dropping %d bytes now...\n",
+ stray_bytes);
+ vsxxxaa_drop_bytes (mouse, stray_bytes);
+ continue;
+ }
+
+ vsxxxaa_handle_REL_packet (mouse, regs);
+ continue; /* More to parse? */
+ }
+
+ if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_ABS, 5)) {
+ /* Check for broken packet */
+ stray_bytes = vsxxxaa_check_packet (mouse, 5);
+ if (stray_bytes > 0) {
+ printk (KERN_ERR "Dropping %d bytes now...\n",
+ stray_bytes);
+ vsxxxaa_drop_bytes (mouse, stray_bytes);
+ continue;
+ }
+
+ vsxxxaa_handle_ABS_packet (mouse, regs);
+ continue; /* More to parse? */
+ }
+
+ if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_POR, 4)) {
+ /* Check for broken packet */
+ stray_bytes = vsxxxaa_check_packet (mouse, 4);
+ if (stray_bytes > 0) {
+ printk (KERN_ERR "Dropping %d bytes now...\n",
+ stray_bytes);
+ vsxxxaa_drop_bytes (mouse, stray_bytes);
+ continue;
+ }
+
+ vsxxxaa_handle_POR_packet (mouse, regs);
+ continue; /* More to parse? */
+ }
+
+ break; /* No REL, ABS or POR packet found */
+ } while (1);
+}
+
+static irqreturn_t
+vsxxxaa_interrupt (struct serio *serio, unsigned char data, unsigned int flags,
+ struct pt_regs *regs)
+{
+ struct vsxxxaa *mouse = serio_get_drvdata (serio);
+
+ vsxxxaa_queue_byte (mouse, data);
+ vsxxxaa_parse_buffer (mouse, regs);
+
+ return IRQ_HANDLED;
+}
+
+static void
+vsxxxaa_disconnect (struct serio *serio)
+{
+ struct vsxxxaa *mouse = serio_get_drvdata (serio);
+
+ input_unregister_device (&mouse->dev);
+ serio_close (serio);
+ serio_set_drvdata (serio, NULL);
+ kfree (mouse);
+}
+
+static int
+vsxxxaa_connect (struct serio *serio, struct serio_driver *drv)
+{
+ struct vsxxxaa *mouse;
+ int err;
+
+ if (!(mouse = kmalloc (sizeof (struct vsxxxaa), GFP_KERNEL)))
+ return -ENOMEM;
+
+ memset (mouse, 0, sizeof (struct vsxxxaa));
+
+ init_input_dev (&mouse->dev);
+ set_bit (EV_KEY, mouse->dev.evbit); /* We have buttons */
+ set_bit (EV_REL, mouse->dev.evbit);
+ set_bit (EV_ABS, mouse->dev.evbit);
+ set_bit (BTN_LEFT, mouse->dev.keybit); /* We have 3 buttons */
+ set_bit (BTN_MIDDLE, mouse->dev.keybit);
+ set_bit (BTN_RIGHT, mouse->dev.keybit);
+ set_bit (BTN_TOUCH, mouse->dev.keybit); /* ...and Tablet */
+ set_bit (REL_X, mouse->dev.relbit);
+ set_bit (REL_Y, mouse->dev.relbit);
+ set_bit (ABS_X, mouse->dev.absbit);
+ set_bit (ABS_Y, mouse->dev.absbit);
+
+ mouse->dev.absmin[ABS_X] = 0;
+ mouse->dev.absmax[ABS_X] = 1023;
+ mouse->dev.absmin[ABS_Y] = 0;
+ mouse->dev.absmax[ABS_Y] = 1023;
+
+ mouse->dev.private = mouse;
+
+ sprintf (mouse->name, "DEC VSXXX-AA/-GA mouse or VSXXX-AB digitizer");
+ sprintf (mouse->phys, "%s/input0", serio->phys);
+ mouse->dev.name = mouse->name;
+ mouse->dev.phys = mouse->phys;
+ mouse->dev.id.bustype = BUS_RS232;
+ mouse->dev.dev = &serio->dev;
+ mouse->serio = serio;
+
+ serio_set_drvdata (serio, mouse);
+
+ err = serio_open (serio, drv);
+ if (err) {
+ serio_set_drvdata (serio, NULL);
+ kfree (mouse);
+ return err;
+ }
+
+ /*
+ * Request selftest. Standard packet format and differential
+ * mode will be requested after the device ID'ed successfully.
+ */
+ mouse->serio->write (mouse->serio, 'T'); /* Test */
+
+ input_register_device (&mouse->dev);
+
+ printk (KERN_INFO "input: %s on %s\n", mouse->name, mouse->phys);
+
+ return 0;
+}
+
+static struct serio_device_id vsxxaa_serio_ids[] = {
+ {
+ .type = SERIO_RS232,
+ .proto = SERIO_VSXXXAA,
+ .id = SERIO_ANY,
+ .extra = SERIO_ANY,
+ },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, vsxxaa_serio_ids);
+
+static struct serio_driver vsxxxaa_drv = {
+ .driver = {
+ .name = "vsxxxaa",
+ },
+ .description = DRIVER_DESC,
+ .id_table = vsxxaa_serio_ids,
+ .connect = vsxxxaa_connect,
+ .interrupt = vsxxxaa_interrupt,
+ .disconnect = vsxxxaa_disconnect,
+};
+
+static int __init
+vsxxxaa_init (void)
+{
+ serio_register_driver(&vsxxxaa_drv);
+ return 0;
+}
+
+static void __exit
+vsxxxaa_exit (void)
+{
+ serio_unregister_driver(&vsxxxaa_drv);
+}
+
+module_init (vsxxxaa_init);
+module_exit (vsxxxaa_exit);
+
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-15 23:27:48 +0000