blob: bc22849c6c79ef12de27efee7e50229881cef0df [file] [log] [blame]
/*
* Generic linux-input device driver for axis-bearing devices
*
* Copyright (c) 2001 Brian S. Julin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL").
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
*
* References:
* HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A
*
*/
#include <linux/hil.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/pci_ids.h>
#define PREFIX "HIL PTR: "
#define HIL_GENERIC_NAME "HIL pointer device"
MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver");
MODULE_LICENSE("Dual BSD/GPL");
#define TABLET_SIMULATES_MOUSE /* allow tablet to be used as mouse */
#undef TABLET_AUTOADJUST /* auto-adjust valid tablet ranges */
#define HIL_PTR_MAX_LENGTH 16
struct hil_ptr {
struct input_dev dev;
struct serio *serio;
/* Input buffer and index for packets from HIL bus. */
hil_packet data[HIL_PTR_MAX_LENGTH];
int idx4; /* four counts per packet */
/* Raw device info records from HIL bus, see hil.h for fields. */
char idd[HIL_PTR_MAX_LENGTH]; /* DID byte and IDD record */
char rsc[HIL_PTR_MAX_LENGTH]; /* RSC record */
char exd[HIL_PTR_MAX_LENGTH]; /* EXD record */
char rnm[HIL_PTR_MAX_LENGTH + 1]; /* RNM record + NULL term. */
/* Extra device details not contained in struct input_dev. */
unsigned int nbtn, naxes;
unsigned int btnmap[7];
/* Something to sleep around with. */
struct semaphore sem;
};
/* Process a complete packet after transfer from the HIL */
static void hil_ptr_process_record(struct hil_ptr *ptr)
{
struct input_dev *dev = &ptr->dev;
hil_packet *data = ptr->data;
hil_packet p;
int idx, i, cnt, laxis;
int ax16, absdev;
idx = ptr->idx4/4;
p = data[idx - 1];
if ((p & ~HIL_CMDCT_POL) ==
(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) goto report;
if ((p & ~HIL_CMDCT_RPL) ==
(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) goto report;
/* Not a poll response. See if we are loading config records. */
switch (p & HIL_PKT_DATA_MASK) {
case HIL_CMD_IDD:
for (i = 0; i < idx; i++)
ptr->idd[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->idd[i] = 0;
break;
case HIL_CMD_RSC:
for (i = 0; i < idx; i++)
ptr->rsc[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->rsc[i] = 0;
break;
case HIL_CMD_EXD:
for (i = 0; i < idx; i++)
ptr->exd[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->exd[i] = 0;
break;
case HIL_CMD_RNM:
for (i = 0; i < idx; i++)
ptr->rnm[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH + 1; i++)
ptr->rnm[i] = '\0';
break;
default:
/* These occur when device isn't present */
if (p == (HIL_ERR_INT | HIL_PKT_CMD)) break;
/* Anything else we'd like to know about. */
printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
break;
}
goto out;
report:
if ((p & HIL_CMDCT_POL) != idx - 1) {
printk(KERN_WARNING PREFIX "Malformed poll packet %x (idx = %i)\n", p, idx);
goto out;
}
i = (ptr->data[0] & HIL_POL_AXIS_ALT) ? 3 : 0;
laxis = ptr->data[0] & HIL_POL_NUM_AXES_MASK;
laxis += i;
ax16 = ptr->idd[1] & HIL_IDD_HEADER_16BIT; /* 8 or 16bit resolution */
absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS;
for (cnt = 1; i < laxis; i++) {
unsigned int lo,hi,val;
lo = ptr->data[cnt++] & HIL_PKT_DATA_MASK;
hi = ax16 ? (ptr->data[cnt++] & HIL_PKT_DATA_MASK) : 0;
if (absdev) {
val = lo + (hi<<8);
#ifdef TABLET_AUTOADJUST
if (val < ptr->dev.absmin[ABS_X + i])
ptr->dev.absmin[ABS_X + i] = val;
if (val > ptr->dev.absmax[ABS_X + i])
ptr->dev.absmax[ABS_X + i] = val;
#endif
if (i%3) val = ptr->dev.absmax[ABS_X + i] - val;
input_report_abs(dev, ABS_X + i, val);
} else {
val = (int) (((int8_t)lo) | ((int8_t)hi<<8));
if (i%3) val *= -1;
input_report_rel(dev, REL_X + i, val);
}
}
while (cnt < idx - 1) {
unsigned int btn;
int up;
btn = ptr->data[cnt++];
up = btn & 1;
btn &= 0xfe;
if (btn == 0x8e) {
continue; /* TODO: proximity == touch? */
}
else if ((btn > 0x8c) || (btn < 0x80)) continue;
btn = (btn - 0x80) >> 1;
btn = ptr->btnmap[btn];
input_report_key(dev, btn, !up);
}
input_sync(dev);
out:
ptr->idx4 = 0;
up(&ptr->sem);
}
static void hil_ptr_process_err(struct hil_ptr *ptr) {
printk(KERN_WARNING PREFIX "errored HIL packet\n");
ptr->idx4 = 0;
up(&ptr->sem);
return;
}
static irqreturn_t hil_ptr_interrupt(struct serio *serio,
unsigned char data, unsigned int flags, struct pt_regs *regs)
{
struct hil_ptr *ptr;
hil_packet packet;
int idx;
ptr = (struct hil_ptr *)serio->private;
if (ptr == NULL) {
BUG();
return IRQ_HANDLED;
}
if (ptr->idx4 >= (HIL_PTR_MAX_LENGTH * sizeof(hil_packet))) {
hil_ptr_process_err(ptr);
return IRQ_HANDLED;
}
idx = ptr->idx4/4;
if (!(ptr->idx4 % 4)) ptr->data[idx] = 0;
packet = ptr->data[idx];
packet |= ((hil_packet)data) << ((3 - (ptr->idx4 % 4)) * 8);
ptr->data[idx] = packet;
/* Records of N 4-byte hil_packets must terminate with a command. */
if ((++(ptr->idx4)) % 4) return IRQ_HANDLED;
if ((packet & 0xffff0000) != HIL_ERR_INT) {
hil_ptr_process_err(ptr);
return IRQ_HANDLED;
}
if (packet & HIL_PKT_CMD)
hil_ptr_process_record(ptr);
return IRQ_HANDLED;
}
static void hil_ptr_disconnect(struct serio *serio)
{
struct hil_ptr *ptr;
ptr = (struct hil_ptr *)serio->private;
if (ptr == NULL) {
BUG();
return;
}
input_unregister_device(&ptr->dev);
serio_close(serio);
kfree(ptr);
}
static void hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
{
struct hil_ptr *ptr;
char *txt;
unsigned int i, naxsets, btntype;
uint8_t did, *idd;
if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return;
if (!(ptr = kmalloc(sizeof(struct hil_ptr), GFP_KERNEL))) return;
memset(ptr, 0, sizeof(struct hil_ptr));
if (serio_open(serio, driver)) goto bail0;
serio->private = ptr;
ptr->serio = serio;
ptr->dev.private = ptr;
init_MUTEX_LOCKED(&(ptr->sem));
/* Get device info. MLC driver supplies devid/status/etc. */
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_IDD);
down(&(ptr->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RSC);
down(&(ptr->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RNM);
down(&(ptr->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EXD);
down(&(ptr->sem));
up(&(ptr->sem));
init_input_dev(&ptr->dev);
did = ptr->idd[0];
idd = ptr->idd + 1;
txt = "unknown";
if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) {
ptr->dev.evbit[0] = BIT(EV_REL);
txt = "relative";
}
if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_ABS) {
ptr->dev.evbit[0] = BIT(EV_ABS);
txt = "absolute";
}
if (!ptr->dev.evbit[0]) {
goto bail1;
}
ptr->nbtn = HIL_IDD_NUM_BUTTONS(idd);
if (ptr->nbtn) ptr->dev.evbit[0] |= BIT(EV_KEY);
naxsets = HIL_IDD_NUM_AXSETS(*idd);
ptr->naxes = HIL_IDD_NUM_AXES_PER_SET(*idd);
printk(KERN_INFO PREFIX "HIL pointer device found (did: 0x%02x, axis: %s)\n",
did, txt);
printk(KERN_INFO PREFIX "HIL pointer has %i buttons and %i sets of %i axes\n",
ptr->nbtn, naxsets, ptr->naxes);
btntype = BTN_MISC;
if ((did & HIL_IDD_DID_ABS_TABLET_MASK) == HIL_IDD_DID_ABS_TABLET)
#ifdef TABLET_SIMULATES_MOUSE
btntype = BTN_TOUCH;
#else
btntype = BTN_DIGI;
#endif
if ((did & HIL_IDD_DID_ABS_TSCREEN_MASK) == HIL_IDD_DID_ABS_TSCREEN)
btntype = BTN_TOUCH;
if ((did & HIL_IDD_DID_REL_MOUSE_MASK) == HIL_IDD_DID_REL_MOUSE)
btntype = BTN_MOUSE;
for (i = 0; i < ptr->nbtn; i++) {
set_bit(btntype | i, ptr->dev.keybit);
ptr->btnmap[i] = btntype | i;
}
if (btntype == BTN_MOUSE) {
/* Swap buttons 2 and 3 */
ptr->btnmap[1] = BTN_MIDDLE;
ptr->btnmap[2] = BTN_RIGHT;
}
if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) {
for (i = 0; i < ptr->naxes; i++) {
set_bit(REL_X + i, ptr->dev.relbit);
}
for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) {
set_bit(REL_X + i, ptr->dev.relbit);
}
} else {
for (i = 0; i < ptr->naxes; i++) {
set_bit(ABS_X + i, ptr->dev.absbit);
ptr->dev.absmin[ABS_X + i] = 0;
ptr->dev.absmax[ABS_X + i] =
HIL_IDD_AXIS_MAX((ptr->idd + 1), i);
}
for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) {
set_bit(ABS_X + i, ptr->dev.absbit);
ptr->dev.absmin[ABS_X + i] = 0;
ptr->dev.absmax[ABS_X + i] =
HIL_IDD_AXIS_MAX((ptr->idd + 1), (i - 3));
}
#ifdef TABLET_AUTOADJUST
for (i = 0; i < ABS_MAX; i++) {
int diff = ptr->dev.absmax[ABS_X + i] / 10;
ptr->dev.absmin[ABS_X + i] += diff;
ptr->dev.absmax[ABS_X + i] -= diff;
}
#endif
}
ptr->dev.name = strlen(ptr->rnm) ? ptr->rnm : HIL_GENERIC_NAME;
ptr->dev.id.bustype = BUS_HIL;
ptr->dev.id.vendor = PCI_VENDOR_ID_HP;
ptr->dev.id.product = 0x0001; /* TODO: get from ptr->rsc */
ptr->dev.id.version = 0x0100; /* TODO: get from ptr->rsc */
ptr->dev.dev = &serio->dev;
input_register_device(&ptr->dev);
printk(KERN_INFO "input: %s (%s), ID: %d\n",
ptr->dev.name,
(btntype == BTN_MOUSE) ? "HIL mouse":"HIL tablet or touchpad",
did);
return;
bail1:
serio_close(serio);
bail0:
kfree(ptr);
return;
}
static struct serio_driver hil_ptr_serio_driver = {
.driver = {
.name = "hil_ptr",
},
.description = "HP HIL mouse/tablet driver",
.connect = hil_ptr_connect,
.disconnect = hil_ptr_disconnect,
.interrupt = hil_ptr_interrupt
};
static int __init hil_ptr_init(void)
{
serio_register_driver(&hil_ptr_serio_driver);
return 0;
}
static void __exit hil_ptr_exit(void)
{
serio_unregister_driver(&hil_ptr_serio_driver);
}
module_init(hil_ptr_init);
module_exit(hil_ptr_exit);