433 lines
11 KiB
C
433 lines
11 KiB
C
/*
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* Generic linux-input device driver for axis-bearing devices
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*
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* Copyright (c) 2001 Brian S. Julin
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL").
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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*
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* References:
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* HP-HIL Technical Reference Manual. Hewlett Packard Product No. 45918A
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*
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*/
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#include <linux/hil.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/pci_ids.h>
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#define PREFIX "HIL PTR: "
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#define HIL_GENERIC_NAME "HIL pointer device"
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MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
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MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver");
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MODULE_LICENSE("Dual BSD/GPL");
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#define TABLET_SIMULATES_MOUSE /* allow tablet to be used as mouse */
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#undef TABLET_AUTOADJUST /* auto-adjust valid tablet ranges */
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#define HIL_PTR_MAX_LENGTH 16
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struct hil_ptr {
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struct input_dev *dev;
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struct serio *serio;
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/* Input buffer and index for packets from HIL bus. */
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hil_packet data[HIL_PTR_MAX_LENGTH];
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int idx4; /* four counts per packet */
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/* Raw device info records from HIL bus, see hil.h for fields. */
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char idd[HIL_PTR_MAX_LENGTH]; /* DID byte and IDD record */
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char rsc[HIL_PTR_MAX_LENGTH]; /* RSC record */
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char exd[HIL_PTR_MAX_LENGTH]; /* EXD record */
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char rnm[HIL_PTR_MAX_LENGTH + 1]; /* RNM record + NULL term. */
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/* Extra device details not contained in struct input_dev. */
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unsigned int nbtn, naxes;
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unsigned int btnmap[7];
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/* Something to sleep around with. */
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struct semaphore sem;
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};
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/* Process a complete packet after transfer from the HIL */
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static void hil_ptr_process_record(struct hil_ptr *ptr)
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{
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struct input_dev *dev = ptr->dev;
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hil_packet *data = ptr->data;
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hil_packet p;
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int idx, i, cnt, laxis;
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int ax16, absdev;
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idx = ptr->idx4/4;
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p = data[idx - 1];
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if ((p & ~HIL_CMDCT_POL) ==
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(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
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goto report;
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if ((p & ~HIL_CMDCT_RPL) ==
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(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
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goto report;
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/* Not a poll response. See if we are loading config records. */
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switch (p & HIL_PKT_DATA_MASK) {
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case HIL_CMD_IDD:
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for (i = 0; i < idx; i++)
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ptr->idd[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_PTR_MAX_LENGTH; i++)
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ptr->idd[i] = 0;
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break;
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case HIL_CMD_RSC:
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for (i = 0; i < idx; i++)
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ptr->rsc[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_PTR_MAX_LENGTH; i++)
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ptr->rsc[i] = 0;
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break;
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case HIL_CMD_EXD:
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for (i = 0; i < idx; i++)
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ptr->exd[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_PTR_MAX_LENGTH; i++)
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ptr->exd[i] = 0;
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break;
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case HIL_CMD_RNM:
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for (i = 0; i < idx; i++)
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ptr->rnm[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_PTR_MAX_LENGTH + 1; i++)
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ptr->rnm[i] = 0;
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break;
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default:
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/* These occur when device isn't present */
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if (p == (HIL_ERR_INT | HIL_PKT_CMD))
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break;
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/* Anything else we'd like to know about. */
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printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
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break;
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}
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goto out;
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report:
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if ((p & HIL_CMDCT_POL) != idx - 1) {
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printk(KERN_WARNING PREFIX
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"Malformed poll packet %x (idx = %i)\n", p, idx);
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goto out;
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}
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i = (ptr->data[0] & HIL_POL_AXIS_ALT) ? 3 : 0;
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laxis = ptr->data[0] & HIL_POL_NUM_AXES_MASK;
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laxis += i;
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ax16 = ptr->idd[1] & HIL_IDD_HEADER_16BIT; /* 8 or 16bit resolution */
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absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS;
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for (cnt = 1; i < laxis; i++) {
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unsigned int lo,hi,val;
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lo = ptr->data[cnt++] & HIL_PKT_DATA_MASK;
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hi = ax16 ? (ptr->data[cnt++] & HIL_PKT_DATA_MASK) : 0;
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if (absdev) {
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val = lo + (hi<<8);
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#ifdef TABLET_AUTOADJUST
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if (val < dev->absmin[ABS_X + i])
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dev->absmin[ABS_X + i] = val;
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if (val > dev->absmax[ABS_X + i])
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dev->absmax[ABS_X + i] = val;
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#endif
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if (i%3) val = dev->absmax[ABS_X + i] - val;
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input_report_abs(dev, ABS_X + i, val);
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} else {
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val = (int) (((int8_t)lo) | ((int8_t)hi<<8));
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if (i%3)
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val *= -1;
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input_report_rel(dev, REL_X + i, val);
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}
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}
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while (cnt < idx - 1) {
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unsigned int btn;
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int up;
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btn = ptr->data[cnt++];
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up = btn & 1;
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btn &= 0xfe;
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if (btn == 0x8e)
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continue; /* TODO: proximity == touch? */
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else
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if ((btn > 0x8c) || (btn < 0x80))
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continue;
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btn = (btn - 0x80) >> 1;
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btn = ptr->btnmap[btn];
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input_report_key(dev, btn, !up);
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}
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input_sync(dev);
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out:
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ptr->idx4 = 0;
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up(&ptr->sem);
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}
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static void hil_ptr_process_err(struct hil_ptr *ptr)
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{
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printk(KERN_WARNING PREFIX "errored HIL packet\n");
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ptr->idx4 = 0;
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up(&ptr->sem);
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}
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static irqreturn_t hil_ptr_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags)
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{
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struct hil_ptr *ptr;
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hil_packet packet;
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int idx;
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ptr = serio_get_drvdata(serio);
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BUG_ON(ptr == NULL);
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if (ptr->idx4 >= (HIL_PTR_MAX_LENGTH * sizeof(hil_packet))) {
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hil_ptr_process_err(ptr);
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return IRQ_HANDLED;
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}
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idx = ptr->idx4/4;
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if (!(ptr->idx4 % 4))
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ptr->data[idx] = 0;
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packet = ptr->data[idx];
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packet |= ((hil_packet)data) << ((3 - (ptr->idx4 % 4)) * 8);
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ptr->data[idx] = packet;
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/* Records of N 4-byte hil_packets must terminate with a command. */
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if ((++(ptr->idx4)) % 4)
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return IRQ_HANDLED;
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if ((packet & 0xffff0000) != HIL_ERR_INT) {
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hil_ptr_process_err(ptr);
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return IRQ_HANDLED;
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}
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if (packet & HIL_PKT_CMD)
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hil_ptr_process_record(ptr);
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return IRQ_HANDLED;
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}
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static void hil_ptr_disconnect(struct serio *serio)
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{
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struct hil_ptr *ptr;
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ptr = serio_get_drvdata(serio);
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BUG_ON(ptr == NULL);
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serio_close(serio);
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input_unregister_device(ptr->dev);
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kfree(ptr);
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}
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static int hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
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{
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struct hil_ptr *ptr;
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const char *txt;
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unsigned int i, naxsets, btntype;
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uint8_t did, *idd;
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if (!(ptr = kzalloc(sizeof(struct hil_ptr), GFP_KERNEL)))
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return -ENOMEM;
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ptr->dev = input_allocate_device();
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if (!ptr->dev)
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goto bail0;
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if (serio_open(serio, driver))
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goto bail1;
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serio_set_drvdata(serio, ptr);
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ptr->serio = serio;
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init_MUTEX_LOCKED(&ptr->sem);
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/* Get device info. MLC driver supplies devid/status/etc. */
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serio->write(serio, 0);
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serio->write(serio, 0);
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serio->write(serio, HIL_PKT_CMD >> 8);
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serio->write(serio, HIL_CMD_IDD);
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down(&ptr->sem);
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serio->write(serio, 0);
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serio->write(serio, 0);
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serio->write(serio, HIL_PKT_CMD >> 8);
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serio->write(serio, HIL_CMD_RSC);
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down(&ptr->sem);
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serio->write(serio, 0);
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serio->write(serio, 0);
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serio->write(serio, HIL_PKT_CMD >> 8);
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serio->write(serio, HIL_CMD_RNM);
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down(&ptr->sem);
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serio->write(serio, 0);
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serio->write(serio, 0);
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serio->write(serio, HIL_PKT_CMD >> 8);
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serio->write(serio, HIL_CMD_EXD);
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down(&ptr->sem);
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up(&ptr->sem);
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did = ptr->idd[0];
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idd = ptr->idd + 1;
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txt = "unknown";
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if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) {
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ptr->dev->evbit[0] = BIT_MASK(EV_REL);
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txt = "relative";
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}
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if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_ABS) {
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ptr->dev->evbit[0] = BIT_MASK(EV_ABS);
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txt = "absolute";
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}
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if (!ptr->dev->evbit[0])
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goto bail2;
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ptr->nbtn = HIL_IDD_NUM_BUTTONS(idd);
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if (ptr->nbtn)
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ptr->dev->evbit[0] |= BIT_MASK(EV_KEY);
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naxsets = HIL_IDD_NUM_AXSETS(*idd);
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ptr->naxes = HIL_IDD_NUM_AXES_PER_SET(*idd);
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printk(KERN_INFO PREFIX "HIL pointer device found (did: 0x%02x, axis: %s)\n",
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did, txt);
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printk(KERN_INFO PREFIX "HIL pointer has %i buttons and %i sets of %i axes\n",
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ptr->nbtn, naxsets, ptr->naxes);
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btntype = BTN_MISC;
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if ((did & HIL_IDD_DID_ABS_TABLET_MASK) == HIL_IDD_DID_ABS_TABLET)
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#ifdef TABLET_SIMULATES_MOUSE
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btntype = BTN_TOUCH;
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#else
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btntype = BTN_DIGI;
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#endif
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if ((did & HIL_IDD_DID_ABS_TSCREEN_MASK) == HIL_IDD_DID_ABS_TSCREEN)
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btntype = BTN_TOUCH;
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if ((did & HIL_IDD_DID_REL_MOUSE_MASK) == HIL_IDD_DID_REL_MOUSE)
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btntype = BTN_MOUSE;
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for (i = 0; i < ptr->nbtn; i++) {
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set_bit(btntype | i, ptr->dev->keybit);
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ptr->btnmap[i] = btntype | i;
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}
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if (btntype == BTN_MOUSE) {
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/* Swap buttons 2 and 3 */
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ptr->btnmap[1] = BTN_MIDDLE;
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ptr->btnmap[2] = BTN_RIGHT;
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}
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if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) {
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for (i = 0; i < ptr->naxes; i++)
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set_bit(REL_X + i, ptr->dev->relbit);
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for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++)
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set_bit(REL_X + i, ptr->dev->relbit);
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} else {
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for (i = 0; i < ptr->naxes; i++) {
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set_bit(ABS_X + i, ptr->dev->absbit);
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ptr->dev->absmin[ABS_X + i] = 0;
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ptr->dev->absmax[ABS_X + i] =
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HIL_IDD_AXIS_MAX((ptr->idd + 1), i);
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}
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for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) {
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set_bit(ABS_X + i, ptr->dev->absbit);
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ptr->dev->absmin[ABS_X + i] = 0;
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ptr->dev->absmax[ABS_X + i] =
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HIL_IDD_AXIS_MAX((ptr->idd + 1), (i - 3));
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}
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#ifdef TABLET_AUTOADJUST
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for (i = 0; i < ABS_MAX; i++) {
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int diff = ptr->dev->absmax[ABS_X + i] / 10;
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ptr->dev->absmin[ABS_X + i] += diff;
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ptr->dev->absmax[ABS_X + i] -= diff;
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}
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#endif
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}
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ptr->dev->name = strlen(ptr->rnm) ? ptr->rnm : HIL_GENERIC_NAME;
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ptr->dev->id.bustype = BUS_HIL;
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ptr->dev->id.vendor = PCI_VENDOR_ID_HP;
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ptr->dev->id.product = 0x0001; /* TODO: get from ptr->rsc */
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ptr->dev->id.version = 0x0100; /* TODO: get from ptr->rsc */
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ptr->dev->dev.parent = &serio->dev;
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input_register_device(ptr->dev);
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printk(KERN_INFO "input: %s (%s), ID: %d\n",
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ptr->dev->name,
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(btntype == BTN_MOUSE) ? "HIL mouse":"HIL tablet or touchpad",
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did);
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return 0;
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bail2:
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serio_close(serio);
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bail1:
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input_free_device(ptr->dev);
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bail0:
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kfree(ptr);
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serio_set_drvdata(serio, NULL);
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return -ENODEV;
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}
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static struct serio_device_id hil_ptr_ids[] = {
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{
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.type = SERIO_HIL_MLC,
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.proto = SERIO_HIL,
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.id = SERIO_ANY,
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.extra = SERIO_ANY,
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},
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{ 0 }
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};
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static struct serio_driver hil_ptr_serio_driver = {
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.driver = {
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.name = "hil_ptr",
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},
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.description = "HP HIL mouse/tablet driver",
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.id_table = hil_ptr_ids,
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.connect = hil_ptr_connect,
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.disconnect = hil_ptr_disconnect,
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.interrupt = hil_ptr_interrupt
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};
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static int __init hil_ptr_init(void)
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{
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return serio_register_driver(&hil_ptr_serio_driver);
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}
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static void __exit hil_ptr_exit(void)
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{
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serio_unregister_driver(&hil_ptr_serio_driver);
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}
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module_init(hil_ptr_init);
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module_exit(hil_ptr_exit);
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