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1da177e4c3
linux-next/drivers/input/keyboard/hil_kbd.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

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/*
* Generic linux-input device driver for keyboard 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 KEYB: "
#define HIL_GENERIC_NAME "HIL keyboard"
MODULE_AUTHOR("Brian S. Julin <bri@calyx.com>");
MODULE_DESCRIPTION(HIL_GENERIC_NAME " driver");
MODULE_LICENSE("Dual BSD/GPL");
#define HIL_KBD_MAX_LENGTH 16
#define HIL_KBD_SET1_UPBIT 0x01
#define HIL_KBD_SET1_SHIFT 1
static unsigned int hil_kbd_set1[HIL_KEYCODES_SET1_TBLSIZE] =
{ HIL_KEYCODES_SET1 };
#define HIL_KBD_SET2_UPBIT 0x01
#define HIL_KBD_SET2_SHIFT 1
/* Set2 is user defined */
#define HIL_KBD_SET3_UPBIT 0x80
#define HIL_KBD_SET3_SHIFT 0
static unsigned int hil_kbd_set3[HIL_KEYCODES_SET3_TBLSIZE] =
{ HIL_KEYCODES_SET3 };
static char hil_language[][16] = { HIL_LOCALE_MAP };
struct hil_kbd {
struct input_dev dev;
struct serio *serio;
/* Input buffer and index for packets from HIL bus. */
hil_packet data[HIL_KBD_MAX_LENGTH];
int idx4; /* four counts per packet */
/* Raw device info records from HIL bus, see hil.h for fields. */
char idd[HIL_KBD_MAX_LENGTH]; /* DID byte and IDD record */
char rsc[HIL_KBD_MAX_LENGTH]; /* RSC record */
char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */
char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */
/* Something to sleep around with. */
struct semaphore sem;
};
/* Process a complete packet after transfer from the HIL */
static void hil_kbd_process_record(struct hil_kbd *kbd)
{
struct input_dev *dev = &kbd->dev;
hil_packet *data = kbd->data;
hil_packet p;
int idx, i, cnt;
idx = kbd->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++)
kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->idd[i] = 0;
break;
case HIL_CMD_RSC:
for (i = 0; i < idx; i++)
kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->rsc[i] = 0;
break;
case HIL_CMD_EXD:
for (i = 0; i < idx; i++)
kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->exd[i] = 0;
break;
case HIL_CMD_RNM:
for (i = 0; i < idx; i++)
kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH + 1; i++)
kbd->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:
cnt = 1;
switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
case HIL_POL_CHARTYPE_NONE:
break;
case HIL_POL_CHARTYPE_ASCII:
while (cnt < idx - 1)
input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);
break;
case HIL_POL_CHARTYPE_RSVD1:
case HIL_POL_CHARTYPE_RSVD2:
case HIL_POL_CHARTYPE_BINARY:
while (cnt < idx - 1)
input_report_key(dev, kbd->data[cnt++], 1);
break;
case HIL_POL_CHARTYPE_SET1:
while (cnt < idx - 1) {
unsigned int key;
int up;
key = kbd->data[cnt++];
up = key & HIL_KBD_SET1_UPBIT;
key &= (~HIL_KBD_SET1_UPBIT & 0xff);
key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];
if (key != KEY_RESERVED)
input_report_key(dev, key, !up);
}
break;
case HIL_POL_CHARTYPE_SET2:
while (cnt < idx - 1) {
unsigned int key;
int up;
key = kbd->data[cnt++];
up = key & HIL_KBD_SET2_UPBIT;
key &= (~HIL_KBD_SET1_UPBIT & 0xff);
key = key >> HIL_KBD_SET2_SHIFT;
if (key != KEY_RESERVED)
input_report_key(dev, key, !up);
}
break;
case HIL_POL_CHARTYPE_SET3:
while (cnt < idx - 1) {
unsigned int key;
int up;
key = kbd->data[cnt++];
up = key & HIL_KBD_SET3_UPBIT;
key &= (~HIL_KBD_SET1_UPBIT & 0xff);
key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];
if (key != KEY_RESERVED)
input_report_key(dev, key, !up);
}
break;
}
out:
kbd->idx4 = 0;
up(&kbd->sem);
}
static void hil_kbd_process_err(struct hil_kbd *kbd) {
printk(KERN_WARNING PREFIX "errored HIL packet\n");
kbd->idx4 = 0;
up(&kbd->sem);
}
static irqreturn_t hil_kbd_interrupt(struct serio *serio,
unsigned char data, unsigned int flags, struct pt_regs *regs)
{
struct hil_kbd *kbd;
hil_packet packet;
int idx;
kbd = (struct hil_kbd *)serio->private;
if (kbd == NULL) {
BUG();
return IRQ_HANDLED;
}
if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {
hil_kbd_process_err(kbd);
return IRQ_HANDLED;
}
idx = kbd->idx4/4;
if (!(kbd->idx4 % 4)) kbd->data[idx] = 0;
packet = kbd->data[idx];
packet |= ((hil_packet)data) << ((3 - (kbd->idx4 % 4)) * 8);
kbd->data[idx] = packet;
/* Records of N 4-byte hil_packets must terminate with a command. */
if ((++(kbd->idx4)) % 4) return IRQ_HANDLED;
if ((packet & 0xffff0000) != HIL_ERR_INT) {
hil_kbd_process_err(kbd);
return IRQ_HANDLED;
}
if (packet & HIL_PKT_CMD) hil_kbd_process_record(kbd);
return IRQ_HANDLED;
}
static void hil_kbd_disconnect(struct serio *serio)
{
struct hil_kbd *kbd;
kbd = (struct hil_kbd *)serio->private;
if (kbd == NULL) {
BUG();
return;
}
input_unregister_device(&kbd->dev);
serio_close(serio);
kfree(kbd);
}
static void hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
{
struct hil_kbd *kbd;
uint8_t did, *idd;
int i;
if (serio->type != (SERIO_HIL_MLC | SERIO_HIL)) return;
if (!(kbd = kmalloc(sizeof(struct hil_kbd), GFP_KERNEL))) return;
memset(kbd, 0, sizeof(struct hil_kbd));
if (serio_open(serio, drv)) goto bail0;
serio->private = kbd;
kbd->serio = serio;
kbd->dev.private = kbd;
init_MUTEX_LOCKED(&(kbd->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(&(kbd->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RSC);
down(&(kbd->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RNM);
down(&(kbd->sem));
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EXD);
down(&(kbd->sem));
up(&(kbd->sem));
did = kbd->idd[0];
idd = kbd->idd + 1;
switch (did & HIL_IDD_DID_TYPE_MASK) {
case HIL_IDD_DID_TYPE_KB_INTEGRAL:
case HIL_IDD_DID_TYPE_KB_ITF:
case HIL_IDD_DID_TYPE_KB_RSVD:
case HIL_IDD_DID_TYPE_CHAR:
printk(KERN_INFO PREFIX "HIL keyboard found (did = 0x%02x, lang = %s)\n",
did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);
break;
default:
goto bail1;
}
if(HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");
goto bail1;
}
kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
kbd->dev.keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
kbd->dev.keycodesize = sizeof(hil_kbd_set1[0]);
kbd->dev.keycode = hil_kbd_set1;
kbd->dev.name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;
kbd->dev.phys = "hpkbd/input0"; /* XXX */
kbd->dev.id.bustype = BUS_HIL;
kbd->dev.id.vendor = PCI_VENDOR_ID_HP;
kbd->dev.id.product = 0x0001; /* TODO: get from kbd->rsc */
kbd->dev.id.version = 0x0100; /* TODO: get from kbd->rsc */
kbd->dev.dev = &serio->dev;
for (i = 0; i < 128; i++) {
set_bit(hil_kbd_set1[i], kbd->dev.keybit);
set_bit(hil_kbd_set3[i], kbd->dev.keybit);
}
clear_bit(0, kbd->dev.keybit);
input_register_device(&kbd->dev);
printk(KERN_INFO "input: %s, ID: %d\n",
kbd->dev.name, did);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */
down(&(kbd->sem));
up(&(kbd->sem));
return;
bail1:
serio_close(serio);
bail0:
kfree(kbd);
}
struct serio_driver hil_kbd_serio_drv = {
.driver = {
.name = "hil_kbd",
},
.description = "HP HIL keyboard driver",
.connect = hil_kbd_connect,
.disconnect = hil_kbd_disconnect,
.interrupt = hil_kbd_interrupt
};
static int __init hil_kbd_init(void)
{
serio_register_driver(&hil_kbd_serio_drv);
return 0;
}
static void __exit hil_kbd_exit(void)
{
serio_unregister_driver(&hil_kbd_serio_drv);
}
module_init(hil_kbd_init);
module_exit(hil_kbd_exit);
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