394 lines
10 KiB
C
394 lines
10 KiB
C
/*
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* Generic linux-input device driver for keyboard 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 KEYB: "
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#define HIL_GENERIC_NAME "HIL keyboard"
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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 HIL_KBD_MAX_LENGTH 16
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#define HIL_KBD_SET1_UPBIT 0x01
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#define HIL_KBD_SET1_SHIFT 1
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static unsigned int hil_kbd_set1[HIL_KEYCODES_SET1_TBLSIZE] =
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{ HIL_KEYCODES_SET1 };
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#define HIL_KBD_SET2_UPBIT 0x01
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#define HIL_KBD_SET2_SHIFT 1
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/* Set2 is user defined */
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#define HIL_KBD_SET3_UPBIT 0x80
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#define HIL_KBD_SET3_SHIFT 0
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static unsigned int hil_kbd_set3[HIL_KEYCODES_SET3_TBLSIZE] =
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{ HIL_KEYCODES_SET3 };
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static char hil_language[][16] = { HIL_LOCALE_MAP };
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struct hil_kbd {
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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_KBD_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_KBD_MAX_LENGTH]; /* DID byte and IDD record */
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char rsc[HIL_KBD_MAX_LENGTH]; /* RSC record */
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char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */
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char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */
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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_kbd_process_record(struct hil_kbd *kbd)
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{
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struct input_dev *dev = kbd->dev;
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hil_packet *data = kbd->data;
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hil_packet p;
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int idx, i, cnt;
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idx = kbd->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)) goto report;
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if ((p & ~HIL_CMDCT_RPL) ==
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(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) 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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kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->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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kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->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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kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->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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kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH + 1; i++)
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kbd->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)) 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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cnt = 1;
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switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
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case HIL_POL_CHARTYPE_NONE:
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break;
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case HIL_POL_CHARTYPE_ASCII:
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while (cnt < idx - 1)
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input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);
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break;
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case HIL_POL_CHARTYPE_RSVD1:
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case HIL_POL_CHARTYPE_RSVD2:
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case HIL_POL_CHARTYPE_BINARY:
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while (cnt < idx - 1)
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input_report_key(dev, kbd->data[cnt++], 1);
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break;
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case HIL_POL_CHARTYPE_SET1:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET1_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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case HIL_POL_CHARTYPE_SET2:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET2_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = key >> HIL_KBD_SET2_SHIFT;
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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case HIL_POL_CHARTYPE_SET3:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET3_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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}
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out:
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kbd->idx4 = 0;
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up(&kbd->sem);
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}
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static void hil_kbd_process_err(struct hil_kbd *kbd) {
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printk(KERN_WARNING PREFIX "errored HIL packet\n");
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kbd->idx4 = 0;
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up(&kbd->sem);
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}
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static irqreturn_t hil_kbd_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags)
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{
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struct hil_kbd *kbd;
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hil_packet packet;
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int idx;
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kbd = serio_get_drvdata(serio);
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if (kbd == NULL) {
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BUG();
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return IRQ_HANDLED;
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}
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if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {
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hil_kbd_process_err(kbd);
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return IRQ_HANDLED;
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}
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idx = kbd->idx4/4;
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if (!(kbd->idx4 % 4)) kbd->data[idx] = 0;
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packet = kbd->data[idx];
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packet |= ((hil_packet)data) << ((3 - (kbd->idx4 % 4)) * 8);
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kbd->data[idx] = packet;
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/* Records of N 4-byte hil_packets must terminate with a command. */
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if ((++(kbd->idx4)) % 4) return IRQ_HANDLED;
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if ((packet & 0xffff0000) != HIL_ERR_INT) {
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hil_kbd_process_err(kbd);
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return IRQ_HANDLED;
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}
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if (packet & HIL_PKT_CMD) hil_kbd_process_record(kbd);
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return IRQ_HANDLED;
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}
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static void hil_kbd_disconnect(struct serio *serio)
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{
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struct hil_kbd *kbd;
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kbd = serio_get_drvdata(serio);
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if (kbd == NULL) {
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BUG();
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return;
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}
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serio_close(serio);
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input_unregister_device(kbd->dev);
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kfree(kbd);
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}
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static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct hil_kbd *kbd;
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uint8_t did, *idd;
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int i;
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kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);
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if (!kbd)
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return -ENOMEM;
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kbd->dev = input_allocate_device();
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if (!kbd->dev)
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goto bail0;
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kbd->dev->private = kbd;
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if (serio_open(serio, drv))
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goto bail1;
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serio_set_drvdata(serio, kbd);
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kbd->serio = serio;
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init_MUTEX_LOCKED(&(kbd->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(&(kbd->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(&(kbd->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(&(kbd->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(&(kbd->sem));
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up(&(kbd->sem));
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did = kbd->idd[0];
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idd = kbd->idd + 1;
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switch (did & HIL_IDD_DID_TYPE_MASK) {
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case HIL_IDD_DID_TYPE_KB_INTEGRAL:
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case HIL_IDD_DID_TYPE_KB_ITF:
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case HIL_IDD_DID_TYPE_KB_RSVD:
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case HIL_IDD_DID_TYPE_CHAR:
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printk(KERN_INFO PREFIX "HIL keyboard found (did = 0x%02x, lang = %s)\n",
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did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);
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break;
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default:
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goto bail2;
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}
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if(HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
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printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");
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goto bail2;
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}
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kbd->dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
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kbd->dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
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kbd->dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
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kbd->dev->keycodesize = sizeof(hil_kbd_set1[0]);
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kbd->dev->keycode = hil_kbd_set1;
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kbd->dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;
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kbd->dev->phys = "hpkbd/input0"; /* XXX */
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kbd->dev->id.bustype = BUS_HIL;
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kbd->dev->id.vendor = PCI_VENDOR_ID_HP;
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kbd->dev->id.product = 0x0001; /* TODO: get from kbd->rsc */
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kbd->dev->id.version = 0x0100; /* TODO: get from kbd->rsc */
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kbd->dev->cdev.dev = &serio->dev;
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for (i = 0; i < 128; i++) {
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set_bit(hil_kbd_set1[i], kbd->dev->keybit);
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set_bit(hil_kbd_set3[i], kbd->dev->keybit);
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}
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clear_bit(0, kbd->dev->keybit);
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input_register_device(kbd->dev);
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printk(KERN_INFO "input: %s, ID: %d\n",
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kbd->dev->name, did);
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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_EK1); /* Enable Keyswitch Autorepeat 1 */
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down(&(kbd->sem));
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up(&(kbd->sem));
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return 0;
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bail2:
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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bail1:
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input_free_device(kbd->dev);
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bail0:
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kfree(kbd);
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return -EIO;
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}
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static struct serio_device_id hil_kbd_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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struct serio_driver hil_kbd_serio_drv = {
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.driver = {
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.name = "hil_kbd",
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},
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.description = "HP HIL keyboard driver",
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.id_table = hil_kbd_ids,
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.connect = hil_kbd_connect,
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.disconnect = hil_kbd_disconnect,
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.interrupt = hil_kbd_interrupt
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};
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static int __init hil_kbd_init(void)
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{
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return serio_register_driver(&hil_kbd_serio_drv);
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}
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static void __exit hil_kbd_exit(void)
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{
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serio_unregister_driver(&hil_kbd_serio_drv);
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}
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module_init(hil_kbd_init);
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module_exit(hil_kbd_exit);
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