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* drivers/input/misc/gsc_ps2.c
*
* Copyright (c) 2002 Laurent Canet <canetl@esiee.fr>
* Copyright (c) 2002 Thibaut Varene <varenet@esiee.fr>
*
* Pieces of code based on linux-2.4's hp_mouse.c & hp_keyb.c
* Copyright (c) 1999 Alex deVries <adevries@thepuffingroup.com>
* Copyright (c) 1999-2000 Philipp Rumpf <prumpf@tux.org>
* Copyright (c) 2000 Xavier Debacker <debackex@esiee.fr>
* Copyright (c) 2000-2001 Thomas Marteau <marteaut@esiee.fr>
*
* HP PS/2 Keyboard, found in PA/RISC Workstations
* very similar to AT keyboards, but without i8042
*
* 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* STATUS:
* 11/09: lc: Only basic keyboard is supported, mouse still needs to be done.
* 11/12: tv: switching iomapping; cleaning code; improving module stuff.
* 11/13: lc & tv: leds aren't working. auto_repeat/meta are. Generaly good behavior.
* 11/15: tv: 2AM: leds ARE working !
* 11/16: tv: 3AM: escaped keycodes emulation *handled*, some keycodes are
* still deliberately ignored (18), what are they used for ?
* 11/21: lc: mouse is now working
* 11/29: tv: first try for error handling in init sequence
*
* TODO:
* Error handling in init sequence
* SysRq handling
* Pause key handling
* Intellimouse & other rodents handling (at least send an error when
* such a mouse is plugged : it will totally fault)
* Mouse: set scaling / Dino testing
* Bug chasing...
*
*/
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ptrace.h> /* interrupt.h wants struct pt_regs defined */
#include <linux/interrupt.h>
#include <linux/sched.h> /* for request_irq/free_irq */
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/pc_keyb.h>
#include <linux/ioport.h>
#include <linux/kd.h>
#include <asm/irq.h>
#include <asm/io.h>
/* Debugging stuff */
#undef KBD_DEBUG
#ifdef KBD_DEBUG
#define DPRINTK(fmt,args...) printk(KERN_DEBUG __FILE__ ":" fmt, ##args)
#else
#define DPRINTK(x,...)
#endif
/*
* Driver constants
*/
/* PS/2 keyboard and mouse constants */
#define AUX_RECONNECT 0xAA /* PS/2 Mouse end of test successful */
#define AUX_REPLY_ACK 0xFA
/* Order of the mouse bytes coming to the host */
#define PACKET_X 1
#define PACKET_Y 2
#define PACKET_CTRL 0
#define GSC_MOUSE_OFFSET 0x0100 /* offset from keyboard to mouse port */
#define GSC_DINO_OFFSET 0x800 /* offset for DINO controller versus LASI one */
#define GSC_ID 0x00 /* ID and reset port offsets */
#define GSC_RESET 0x00
#define GSC_RCVDATA 0x04 /* receive and transmit port offsets */
#define GSC_XMTDATA 0x04
#define GSC_CONTROL 0x08 /* see: control register bits */
#define GSC_STATUS 0x0C /* see: status register bits */
/* Control register bits */
#define GSC_CTRL_ENBL 0x01 /* enable interface */
#define GSC_CTRL_LPBXR 0x02 /* loopback operation */
#define GSC_CTRL_DIAG 0x20 /* directly control clock/data line */
#define GSC_CTRL_DATDIR 0x40 /* data line direct control */
#define GSC_CTRL_CLKDIR 0x80 /* clock line direct control */
/* Status register bits */
#define GSC_STAT_RBNE 0x01 /* Receive Buffer Not Empty */
#define GSC_STAT_TBNE 0x02 /* Transmit Buffer Not Empty */
#define GSC_STAT_TERR 0x04 /* Timeout Error */
#define GSC_STAT_PERR 0x08 /* Parity Error */
#define GSC_STAT_CMPINTR 0x10 /* Composite Interrupt */
#define GSC_STAT_DATSHD 0x40 /* Data Line Shadow */
#define GSC_STAT_CLKSHD 0x80 /* Clock Line Shadow */
/* Keycode map */
#define KBD_ESCAPE0 0xe0
#define KBD_ESCAPE1 0xe1
#define KBD_RELEASE 0xf0
#define KBD_ACK 0xfa
#define KBD_RESEND 0xfe
#define KBD_UNKNOWN 0
#define KBD_TBLSIZE 512
/* Mouse */
#define MOUSE_LEFTBTN 0x1
#define MOUSE_MIDBTN 0x4
#define MOUSE_RIGHTBTN 0x2
#define MOUSE_ALWAYS1 0x8
#define MOUSE_XSIGN 0x10
#define MOUSE_YSIGN 0x20
#define MOUSE_XOVFLOW 0x40
#define MOUSE_YOVFLOW 0x80
static unsigned char hpkeyb_keycode[KBD_TBLSIZE] =
{
/* 00 */ KBD_UNKNOWN, KEY_F9, KBD_UNKNOWN, KEY_F5, KEY_F3, KEY_F1, KEY_F2, KEY_F12,
/* 08 */ KBD_UNKNOWN, KEY_F10, KEY_F8, KEY_F6, KEY_F4, KEY_TAB, KEY_GRAVE, KBD_UNKNOWN,
/* 10 */ KBD_UNKNOWN, KEY_LEFTALT, KEY_LEFTSHIFT, KBD_UNKNOWN, KEY_LEFTCTRL, KEY_Q, KEY_1, KBD_UNKNOWN,
/* 18 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_Z, KEY_S, KEY_A, KEY_W, KEY_2, KBD_UNKNOWN,
/* 20 */ KBD_UNKNOWN, KEY_C, KEY_X, KEY_D, KEY_E, KEY_4, KEY_3, KBD_UNKNOWN,
/* 28 */ KBD_UNKNOWN, KEY_SPACE, KEY_V, KEY_F, KEY_T, KEY_R, KEY_5, KBD_UNKNOWN,
/* 30 */ KBD_UNKNOWN, KEY_N, KEY_B, KEY_H, KEY_G, KEY_Y, KEY_6, KBD_UNKNOWN,
/* 38 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_M, KEY_J, KEY_U, KEY_7, KEY_8, KBD_UNKNOWN,
/* 40 */ KBD_UNKNOWN, KEY_COMMA, KEY_K, KEY_I, KEY_O, KEY_0, KEY_9, KBD_UNKNOWN,
/* 48 */ KBD_UNKNOWN, KEY_DOT, KEY_SLASH, KEY_L, KEY_SEMICOLON, KEY_P, KEY_MINUS, KBD_UNKNOWN,
/* 50 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_APOSTROPHE,KBD_UNKNOWN, KEY_LEFTBRACE, KEY_EQUAL, KBD_UNKNOWN, KBD_UNKNOWN,
/* 58 */ KEY_CAPSLOCK, KEY_RIGHTSHIFT,KEY_ENTER, KEY_RIGHTBRACE,KBD_UNKNOWN, KEY_BACKSLASH,KBD_UNKNOWN, KBD_UNKNOWN,
/* 60 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KEY_BACKSPACE, KBD_UNKNOWN,
/* 68 */ KBD_UNKNOWN, KEY_KP1, KBD_UNKNOWN, KEY_KP4, KEY_KP7, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 70 */ KEY_KP0, KEY_KPDOT, KEY_KP2, KEY_KP5, KEY_KP6, KEY_KP8, KEY_ESC, KEY_NUMLOCK,
/* 78 */ KEY_F11, KEY_KPPLUS, KEY_KP3, KEY_KPMINUS, KEY_KPASTERISK,KEY_KP9, KEY_SCROLLLOCK,KEY_103RD,
/* 80 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KEY_F7, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 88 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 90 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 98 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* a0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* a8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* b0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* b8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* c0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* c8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* d0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* d8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* e0 */ KBD_ESCAPE0, KBD_ESCAPE1, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* e8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* f0 */ KBD_RELEASE, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* f8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_ACK, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_RESEND, KBD_UNKNOWN,
/* These are offset for escaped keycodes */
/* 00 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 08 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 10 */ KBD_UNKNOWN, KEY_RIGHTALT, KBD_UNKNOWN, KBD_UNKNOWN, KEY_RIGHTCTRL, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 18 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 20 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 28 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 30 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 38 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 40 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 48 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_KPSLASH, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 50 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 58 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_KPENTER, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 60 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 68 */ KBD_UNKNOWN, KEY_END, KBD_UNKNOWN, KEY_LEFT, KEY_HOME, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 70 */ KEY_INSERT, KEY_DELETE, KEY_DOWN, KBD_UNKNOWN, KEY_RIGHT, KEY_UP, KBD_UNKNOWN, KBD_UNKNOWN,
/* 78 */ KBD_UNKNOWN, KBD_UNKNOWN, KEY_PAGEDOWN, KBD_UNKNOWN, KEY_SYSRQ, KEY_PAGEUP, KBD_UNKNOWN, KBD_UNKNOWN,
/* 80 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 88 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 90 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* 98 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* a0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* a8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* b0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* b8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* c0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* c8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* d0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* d8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* e0 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* e8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* f0 */ KBD_RELEASE, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN,
/* f8 */ KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN, KBD_UNKNOWN
};
/* Keyboard struct */
static struct {
struct input_dev dev;
char * addr;
unsigned int irq;
unsigned int scancode;
unsigned int escaped;
unsigned int released;
unsigned int initialized;
}
hpkeyb = {
.escaped = 0,
.released = 0,
.initialized = 0
};
/* Mouse struct */
static struct {
struct input_dev dev;
char * addr;
unsigned long irq;
unsigned long initialized;
int nbread;
unsigned char bytes[3];
unsigned long last;
}
hpmouse = {
.initialized = 0,
.nbread = 0
};
static spinlock_t gscps2_lock = SPIN_LOCK_UNLOCKED;
/*
* Various HW level routines
*/
#define gscps2_readb_input(x) readb(x+GSC_RCVDATA)
#define gscps2_readb_control(x) readb(x+GSC_CONTROL)
#define gscps2_readb_status(x) readb(x+GSC_STATUS)
#define gscps2_writeb_control(x, y) writeb(x, y+GSC_CONTROL)
static inline void gscps2_writeb_output(u8 val, char * addr)
{
int wait = 250; /* Keyboard is expected to react within 250ms */
while (gscps2_readb_status(addr) & GSC_STAT_TBNE) {
if (!--wait)
return; /* This should not happen */
mdelay(1);
}
writeb(val, addr+GSC_XMTDATA);
}
static inline unsigned char gscps2_wait_input(char * addr)
{
int wait = 250; /* Keyboard is expected to react within 250ms */
while (!(gscps2_readb_status(addr) & GSC_STAT_RBNE)) {
if (!--wait)
return 0; /* This should not happen */
mdelay(1);
}
return gscps2_readb_input(addr);
}
static int gscps2_writeb_safe_output(u8 val)
{
/* This function waits for keyboard's ACK */
u8 scanread = KBD_UNKNOWN;
int loop = 5;
while (hpkeyb_keycode[scanread]!=KBD_ACK && --loop > 0) {
gscps2_writeb_output(val, hpkeyb.addr);
mdelay(5);
scanread = gscps2_wait_input(hpkeyb.addr);
}
if (loop <= 0)
return -1;
return 0;
}
/* Reset the PS2 port */
static void __init gscps2_reset(char * addr)
{
/* reset the interface */
writeb(0xff, addr+GSC_RESET);
writeb(0x0 , addr+GSC_RESET);
/* enable it */
gscps2_writeb_control(gscps2_readb_control(addr) | GSC_CTRL_ENBL, addr);
}
/**
* gscps2_kbd_docode() - PS2 Keyboard basic handler
*
* Receives a keyboard scancode, analyses it and sends it to the input layer.
*/
static void gscps2_kbd_docode(void)
{
int scancode = gscps2_readb_input(hpkeyb.addr);
DPRINTK("rel=%d scancode=%d, esc=%d ", hpkeyb.released, scancode, hpkeyb.escaped);
/* Handle previously escaped scancodes */
if (hpkeyb.escaped == KBD_ESCAPE0)
scancode |= 0x100; /* jump to the next 256 chars of the table */
switch (hpkeyb_keycode[scancode]) {
case KBD_RELEASE:
DPRINTK("release\n");
hpkeyb.released = 1;
break;
case KBD_RESEND:
DPRINTK("resend request\n");
break;
case KBD_ACK:
DPRINTK("ACK\n");
break;
case KBD_ESCAPE0:
case KBD_ESCAPE1:
DPRINTK("escape code %d\n", hpkeyb_keycode[scancode]);
hpkeyb.escaped = hpkeyb_keycode[scancode];
break;
case KBD_UNKNOWN:
DPRINTK("received unknown scancode %d, escape %d.\n",
scancode, hpkeyb.escaped); /* This is a DPRINTK atm since we do not handle escaped scancodes cleanly */
if (hpkeyb.escaped)
hpkeyb.escaped = 0;
if (hpkeyb.released)
hpkeyb.released = 0;
return;
default:
hpkeyb.scancode = scancode;
DPRINTK("sent=%d, rel=%d\n",hpkeyb.scancode, hpkeyb.released);
input_report_key(&hpkeyb.dev, hpkeyb_keycode[hpkeyb.scancode], !hpkeyb.released);
input_sync(&hpkeyb.dev);
if (hpkeyb.escaped)
hpkeyb.escaped = 0;
if (hpkeyb.released)
hpkeyb.released = 0;
break;
}
}
/**
* gscps2_mouse_docode() - PS2 Mouse basic handler
*
* Receives mouse codes, processes them by packets of three, and sends
* correct events to the input layer.
*/
static void gscps2_mouse_docode(void)
{
int xrel, yrel;
/* process BAT (end of basic tests) command */
if ((hpmouse.nbread == 1) && (hpmouse.bytes[0] == AUX_RECONNECT))
hpmouse.nbread--;
/* stolen from psmouse.c */
if (hpmouse.nbread && time_after(jiffies, hpmouse.last + HZ/20)) {
printk(KERN_DEBUG "%s:%d : Lost mouse synchronization, throwing %d bytes away.\n", __FILE__, __LINE__,
hpmouse.nbread);
hpmouse.nbread = 0;
}
hpmouse.last = jiffies;
hpmouse.bytes[hpmouse.nbread++] = gscps2_readb_input(hpmouse.addr);
/* process packet */
if (hpmouse.nbread == 3) {
if (!(hpmouse.bytes[PACKET_CTRL] & MOUSE_ALWAYS1))
DPRINTK("Mouse: error on packet always1 bit checking\n");
/* XXX should exit now, bad data on the line! */
if ((hpmouse.bytes[PACKET_CTRL] & (MOUSE_XOVFLOW | MOUSE_YOVFLOW)))
DPRINTK("Mouse: position overflow\n");
input_report_key(&hpmouse.dev, BTN_LEFT, hpmouse.bytes[PACKET_CTRL] & MOUSE_LEFTBTN);
input_report_key(&hpmouse.dev, BTN_MIDDLE, hpmouse.bytes[PACKET_CTRL] & MOUSE_MIDBTN);
input_report_key(&hpmouse.dev, BTN_RIGHT, hpmouse.bytes[PACKET_CTRL] & MOUSE_RIGHTBTN);
xrel = hpmouse.bytes[PACKET_X];
yrel = hpmouse.bytes[PACKET_Y];
/* Data sent by mouse are 9-bit signed, the sign bit is in the control packet */
if (xrel && (hpmouse.bytes[PACKET_CTRL] & MOUSE_XSIGN))
xrel = xrel - 0x100;
if (yrel && (hpmouse.bytes[PACKET_CTRL] & MOUSE_YSIGN))
yrel = yrel - 0x100;
input_report_rel(&hpmouse.dev, REL_X, xrel);
input_report_rel(&hpmouse.dev, REL_Y, -yrel); /* Y axis is received upside-down */
input_sync(&hpmouse.dev);
hpmouse.nbread = 0;
}
}
/**
* gscps2_interrupt() - Interruption service routine
*
* This processes the list of scancodes queued and sends appropriate
* key value to the system.
*/
static void gscps2_interrupt(int irq, void *dev, struct pt_regs *reg)
{
/* process mouse actions */
while (gscps2_readb_status(hpmouse.addr) & GSC_STAT_RBNE)
gscps2_mouse_docode();
/* process keyboard scancode */
while (gscps2_readb_status(hpkeyb.addr) & GSC_STAT_RBNE)
gscps2_kbd_docode();
}
/**
* gscps2_hpkeyb_event() - Event handler
* @return: success/error report
*
* Currently only updates leds on keyboard
*/
int gscps2_hpkeyb_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
DPRINTK("Calling %s, type=%d, code=%d, value=%d\n",
__FUNCTION__, type, code, value);
if (!hpkeyb.initialized)
return -1;
if (type == EV_LED) {
u8 leds[2];
if (gscps2_writeb_safe_output(KBD_CMD_SET_LEDS)) {
printk(KERN_ERR "gsckbd_leds: timeout\n");
return -1;
}
DPRINTK("KBD_CMD_SET_LEDS\n");
*leds = (test_bit(LED_SCROLLL, dev->led) ? LED_SCR : 0)
| (test_bit(LED_NUML, dev->led) ? LED_NUM : 0)
| (test_bit(LED_CAPSL, dev->led) ? LED_CAP : 0);
DPRINTK("Sending leds=%x\n", *leds);
if (gscps2_writeb_safe_output(*leds)) {
printk(KERN_ERR "gsckbd_leds: timeout\n");
return -1;
}
DPRINTK("leds sent\n");
if (gscps2_writeb_safe_output(KBD_CMD_ENABLE)) {
printk(KERN_ERR "gsckbd_leds: timeout\n");
return -1;
}
DPRINTK("End\n");
return 0;
}
return -1;
}
/**
* gscps2_kbd_probe() - Probes keyboard device and init input_dev structure
* @return: number of device initialized (1, 0 on error)
*/
static int __init gscps2_kbd_probe(void)
{
int i, res = 0;
unsigned long flags;
if (hpkeyb.initialized) {
printk(KERN_ERR "GSC PS/2 keyboard driver already registered\n");
return 0;
}
spin_lock_irqsave(&gscps2_lock, flags);
if (!gscps2_writeb_safe_output(KBD_CMD_SET_LEDS) &&
!gscps2_writeb_safe_output(0) &&
!gscps2_writeb_safe_output(KBD_CMD_ENABLE))
res = 1;
spin_unlock_irqrestore(&gscps2_lock, flags);
if (!res)
printk(KERN_ERR "Keyboard initialization sequence failled\n");
init_input_dev(&hpkeyb.dev);
for (i = 0; i < KBD_TBLSIZE; i++)
if (hpkeyb_keycode[i] != KBD_UNKNOWN)
set_bit(hpkeyb_keycode[i], hpkeyb.dev.keybit);
hpkeyb.dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
hpkeyb.dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
hpkeyb.dev.keycode = hpkeyb_keycode;
hpkeyb.dev.keycodesize = sizeof(unsigned char);
hpkeyb.dev.keycodemax = KBD_TBLSIZE;
hpkeyb.dev.name = "GSC Keyboard";
hpkeyb.dev.phys = "hpkbd/input0";
hpkeyb.dev.event = gscps2_hpkeyb_event;
/* TODO These need some adjustement, are they really useful ? */
hpkeyb.dev.id.bustype = BUS_GSC;
hpkeyb.dev.id.vendor = 0x0001;
hpkeyb.dev.id.product = 0x0001;
hpkeyb.dev.id.version = 0x0010;
hpkeyb.initialized = 1;
return 1;
}
/**
* gscps2_mouse_probe() - Probes mouse device and init input_dev structure
* @return: number of device initialized (1, 0 on error)
*
* Currently no check on initialization is performed
*/
static int __init gscps2_mouse_probe(void)
{
if (hpmouse.initialized) {
printk(KERN_ERR "GSC PS/2 Mouse driver already registered\n");
return 0;
}
init_input_dev(&hpmouse.dev);
hpmouse.dev.name = "GSC Mouse";
hpmouse.dev.phys = "hpmouse/input0";
hpmouse.dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
hpmouse.dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
hpmouse.dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
hpmouse.last = 0;
gscps2_writeb_output(AUX_ENABLE_DEV, hpmouse.addr);
/* Try it a second time, this will give status if the device is available */
gscps2_writeb_output(AUX_ENABLE_DEV, hpmouse.addr);
/* TODO These need some adjustement, are they really useful ? */
hpmouse.dev.id.bustype = BUS_GSC;
hpmouse.dev.id.vendor = 0x0001;
hpmouse.dev.id.product = 0x0001;
hpmouse.dev.id.version = 0x0010;
hpmouse.initialized = 1;
return 1; /* XXX: we don't check if initialization failed */
}
/**
* gscps2_probe() - Probes PS2 devices
* @return: success/error report
*/
static int __init gscps2_probe(struct parisc_device *dev)
{
u8 id;
char *addr, *name;
int ret, device_found = 0;
unsigned long hpa = dev->hpa;
if (!dev->irq)
goto fail_pitifully;
/* Offset for DINO PS/2. Works with LASI even */
if (dev->id.sversion == 0x96)
hpa += GSC_DINO_OFFSET;
addr = ioremap(hpa, 256);
if (!hpmouse.initialized || !hpkeyb.initialized)
gscps2_reset(addr);
ret = -EINVAL;
id = readb(addr+GSC_ID) & 0x0f;
switch (id) {
case 0: /* keyboard */
hpkeyb.addr = addr;
name = "keyboard";
device_found = gscps2_kbd_probe();
break;
case 1: /* mouse */
hpmouse.addr = addr;
name = "mouse";
device_found = gscps2_mouse_probe();
break;
default:
printk(KERN_WARNING "%s: Unsupported PS/2 port (id=%d) ignored\n",
__FUNCTION__, id);
goto fail_miserably;
}
/* No valid device found */
ret = -ENODEV;
if (!device_found)
goto fail_miserably;
/* Here we claim only if we have a device attached */
/* Allocate the irq and memory region for that device */
ret = -EBUSY;
if (request_irq(dev->irq, gscps2_interrupt, 0, name, NULL))
goto fail_miserably;
if (!request_mem_region(hpa, GSC_STATUS + 4, name))
goto fail_request_mem;
/* Finalize input struct and register it */
switch (id) {
case 0: /* keyboard */
hpkeyb.irq = dev->irq;
input_register_device(&hpkeyb.dev);
break;
case 1: /* mouse */
hpmouse.irq = dev->irq;
input_register_device(&hpmouse.dev);
break;
default:
break;
}
printk(KERN_INFO "input: PS/2 %s port at 0x%08lx (irq %d) found and attached\n",
name, hpa, dev->irq);
return 0;
fail_request_mem: free_irq(dev->irq, NULL);
fail_miserably: iounmap(addr);
fail_pitifully: return ret;
}
static struct parisc_device_id gscps2_device_tbl[] = {
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00084 }, /* LASI PS/2 */
/* { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00096 }, DINO PS/2 (XXX Not yet tested) */
{ 0, } /* 0 terminated list */
};
static struct parisc_driver gscps2_driver = {
.name = "GSC PS2",
.id_table = gscps2_device_tbl,
.probe = gscps2_probe,
};
static int __init gscps2_init(void)
{
if (register_parisc_driver(&gscps2_driver))
return -EBUSY;
return 0;
}
static void __exit gscps2_exit(void)
{
/* TODO this is probably not very good and needs to be checked */
if (hpkeyb.initialized) {
free_irq(hpkeyb.irq, gscps2_interrupt);
iounmap(hpkeyb.addr);
hpkeyb.initialized = 0;
input_unregister_device(&hpkeyb.dev);
}
if (hpmouse.initialized) {
free_irq(hpmouse.irq, gscps2_interrupt);
iounmap(hpmouse.addr);
hpmouse.initialized = 0;
input_unregister_device(&hpmouse.dev);
}
unregister_parisc_driver(&gscps2_driver);
}
MODULE_AUTHOR("Laurent Canet <canetl@esiee.fr>, Thibaut Varene <varenet@esiee.fr>");
MODULE_DESCRIPTION("GSC PS/2 keyboard/mouse driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(parisc, gscps2_device_tbl);
module_init(gscps2_init);
module_exit(gscps2_exit);
|