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linux/drivers/input/joystick/sidewinder.c
Dmitry Torokhov 2547203d58 Input: gameport - check return value of gameport_register_driver() 
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-07-30 00:41:36 -04:00

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/*
* Copyright (c) 1998-2005 Vojtech Pavlik
*/
/*
* Microsoft SideWinder joystick family driver for Linux
*/
/*
* 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 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/gameport.h>
#include <linux/jiffies.h>
#define DRIVER_DESC "Microsoft SideWinder joystick family driver"
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* These are really magic values. Changing them can make a problem go away,
* as well as break everything.
*/
#undef SW_DEBUG
#undef SW_DEBUG_DATA
#define SW_START 600 /* The time we wait for the first bit [600 us] */
#define SW_STROBE 60 /* Max time per bit [60 us] */
#define SW_TIMEOUT 6 /* Wait for everything to settle [6 ms] */
#define SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
#define SW_END 8 /* Number of bits before end of packet to kick */
#define SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
#define SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
#define SW_OK 64 /* Number of packet read successes to switch optimization back on */
#define SW_LENGTH 512 /* Max number of bits in a packet */
#ifdef SW_DEBUG
#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif
/*
* SideWinder joystick types ...
*/
#define SW_ID_3DP 0
#define SW_ID_GP 1
#define SW_ID_PP 2
#define SW_ID_FFP 3
#define SW_ID_FSP 4
#define SW_ID_FFW 5
/*
* Names, buttons, axes ...
*/
static char *sw_name[] = { "3D Pro", "GamePad", "Precision Pro", "Force Feedback Pro", "FreeStyle Pro",
"Force Feedback Wheel" };
static char sw_abs[][7] = {
{ ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
{ ABS_X, ABS_Y },
{ ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
{ ABS_X, ABS_Y, ABS_RZ, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y },
{ ABS_RX, ABS_RUDDER, ABS_THROTTLE }};
static char sw_bit[][7] = {
{ 10, 10, 9, 10, 1, 1 },
{ 1, 1 },
{ 10, 10, 6, 7, 1, 1 },
{ 10, 10, 6, 7, 1, 1 },
{ 10, 10, 6, 1, 1 },
{ 10, 7, 7, 1, 1 }};
static short sw_btn[][12] = {
{ BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_MODE },
{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE },
{ BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
{ BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_SELECT },
{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_START, BTN_MODE, BTN_SELECT },
{ BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_THUMB2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4 }};
static struct {
int x;
int y;
} sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
struct sw {
struct gameport *gameport;
struct input_dev *dev[4];
char name[64];
char phys[4][32];
int length;
int type;
int bits;
int number;
int fail;
int ok;
int reads;
int bads;
};
/*
* sw_read_packet() is a function which reads either a data packet, or an
* identification packet from a SideWinder joystick. The protocol is very,
* very, very braindamaged. Microsoft patented it in US patent #5628686.
*/
static int sw_read_packet(struct gameport *gameport, unsigned char *buf, int length, int id)
{
unsigned long flags;
int timeout, bitout, sched, i, kick, start, strobe;
unsigned char pending, u, v;
i = -id; /* Don't care about data, only want ID */
timeout = id ? gameport_time(gameport, SW_TIMEOUT * 1000) : 0; /* Set up global timeout for ID packet */
kick = id ? gameport_time(gameport, SW_KICK) : 0; /* Set up kick timeout for ID packet */
start = gameport_time(gameport, SW_START);
strobe = gameport_time(gameport, SW_STROBE);
bitout = start;
pending = 0;
sched = 0;
local_irq_save(flags); /* Quiet, please */
gameport_trigger(gameport); /* Trigger */
v = gameport_read(gameport);
do {
bitout--;
u = v;
v = gameport_read(gameport);
} while (!(~v & u & 0x10) && (bitout > 0)); /* Wait for first falling edge on clock */
if (bitout > 0)
bitout = strobe; /* Extend time if not timed out */
while ((timeout > 0 || bitout > 0) && (i < length)) {
timeout--;
bitout--; /* Decrement timers */
sched--;
u = v;
v = gameport_read(gameport);
if ((~u & v & 0x10) && (bitout > 0)) { /* Rising edge on clock - data bit */
if (i >= 0) /* Want this data */
buf[i] = v >> 5; /* Store it */
i++; /* Advance index */
bitout = strobe; /* Extend timeout for next bit */
}
if (kick && (~v & u & 0x01)) { /* Falling edge on axis 0 */
sched = kick; /* Schedule second trigger */
kick = 0; /* Don't schedule next time on falling edge */
pending = 1; /* Mark schedule */
}
if (pending && sched < 0 && (i > -SW_END)) { /* Second trigger time */
gameport_trigger(gameport); /* Trigger */
bitout = start; /* Long bit timeout */
pending = 0; /* Unmark schedule */
timeout = 0; /* Switch from global to bit timeouts */
}
}
local_irq_restore(flags); /* Done - relax */
#ifdef SW_DEBUG_DATA
{
int j;
printk(KERN_DEBUG "sidewinder.c: Read %d triplets. [", i);
for (j = 0; j < i; j++) printk("%d", buf[j]);
printk("]\n");
}
#endif
return i;
}
/*
* sw_get_bits() and GB() compose bits from the triplet buffer into a __u64.
* Parameter 'pos' is bit number inside packet where to start at, 'num' is number
* of bits to be read, 'shift' is offset in the resulting __u64 to start at, bits
* is number of bits per triplet.
*/
#define GB(pos,num) sw_get_bits(buf, pos, num, sw->bits)
static __u64 sw_get_bits(unsigned char *buf, int pos, int num, char bits)
{
__u64 data = 0;
int tri = pos % bits; /* Start position */
int i = pos / bits;
int bit = 0;
while (num--) {
data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
if (tri == bits) {
i++; /* Next triplet */
tri = 0;
}
}
return data;
}
/*
* sw_init_digital() initializes a SideWinder 3D Pro joystick
* into digital mode.
*/
static void sw_init_digital(struct gameport *gameport)
{
int seq[] = { 140, 140+725, 140+300, 0 };
unsigned long flags;
int i, t;
local_irq_save(flags);
i = 0;
do {
gameport_trigger(gameport); /* Trigger */
t = gameport_time(gameport, SW_TIMEOUT * 1000);
while ((gameport_read(gameport) & 1) && t) t--; /* Wait for axis to fall back to 0 */
udelay(seq[i]); /* Delay magic time */
} while (seq[++i]);
gameport_trigger(gameport); /* Last trigger */
local_irq_restore(flags);
}
/*
* sw_parity() computes parity of __u64
*/
static int sw_parity(__u64 t)
{
int x = t ^ (t >> 32);
x ^= x >> 16;
x ^= x >> 8;
x ^= x >> 4;
x ^= x >> 2;
x ^= x >> 1;
return x & 1;
}
/*
* sw_ccheck() checks synchronization bits and computes checksum of nibbles.
*/
static int sw_check(__u64 t)
{
unsigned char sum = 0;
if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
return -1;
while (t) { /* Sum */
sum += t & 0xf;
t >>= 4;
}
return sum & 0xf;
}
/*
* sw_parse() analyzes SideWinder joystick data, and writes the results into
* the axes and buttons arrays.
*/
static int sw_parse(unsigned char *buf, struct sw *sw)
{
int hat, i, j;
struct input_dev *dev;
switch (sw->type) {
case SW_ID_3DP:
if (sw_check(GB(0,64)) || (hat = (GB(6,1) << 3) | GB(60,3)) > 8)
return -1;
dev = sw->dev[0];
input_report_abs(dev, ABS_X, (GB( 3,3) << 7) | GB(16,7));
input_report_abs(dev, ABS_Y, (GB( 0,3) << 7) | GB(24,7));
input_report_abs(dev, ABS_RZ, (GB(35,2) << 7) | GB(40,7));
input_report_abs(dev, ABS_THROTTLE, (GB(32,3) << 7) | GB(48,7));
input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
for (j = 0; j < 7; j++)
input_report_key(dev, sw_btn[SW_ID_3DP][j], !GB(j+8,1));
input_report_key(dev, BTN_BASE4, !GB(38,1));
input_report_key(dev, BTN_BASE5, !GB(37,1));
input_sync(dev);
return 0;
case SW_ID_GP:
for (i = 0; i < sw->number; i ++) {
if (sw_parity(GB(i*15,15)))
return -1;
input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1));
input_report_abs(sw->dev[i], ABS_Y, GB(i*15+0,1) - GB(i*15+1,1));
for (j = 0; j < 10; j++)
input_report_key(sw->dev[i], sw_btn[SW_ID_GP][j], !GB(i*15+j+4,1));
input_sync(sw->dev[i]);
}
return 0;
case SW_ID_PP:
case SW_ID_FFP:
if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8)
return -1;
dev = sw->dev[0];
input_report_abs(dev, ABS_X, GB( 9,10));
input_report_abs(dev, ABS_Y, GB(19,10));
input_report_abs(dev, ABS_RZ, GB(36, 6));
input_report_abs(dev, ABS_THROTTLE, GB(29, 7));
input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
for (j = 0; j < 9; j++)
input_report_key(dev, sw_btn[SW_ID_PP][j], !GB(j,1));
input_sync(dev);
return 0;
case SW_ID_FSP:
if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8)
return -1;
dev = sw->dev[0];
input_report_abs(dev, ABS_X, GB( 0,10));
input_report_abs(dev, ABS_Y, GB(16,10));
input_report_abs(dev, ABS_THROTTLE, GB(32, 6));
input_report_abs(dev, ABS_HAT0X, sw_hat_to_axis[hat].x);
input_report_abs(dev, ABS_HAT0Y, sw_hat_to_axis[hat].y);
for (j = 0; j < 6; j++)
input_report_key(dev, sw_btn[SW_ID_FSP][j], !GB(j+10,1));
input_report_key(dev, BTN_TR, !GB(26,1));
input_report_key(dev, BTN_START, !GB(27,1));
input_report_key(dev, BTN_MODE, !GB(38,1));
input_report_key(dev, BTN_SELECT, !GB(39,1));
input_sync(dev);
return 0;
case SW_ID_FFW:
if (!sw_parity(GB(0,33)))
return -1;
dev = sw->dev[0];
input_report_abs(dev, ABS_RX, GB( 0,10));
input_report_abs(dev, ABS_RUDDER, GB(10, 6));
input_report_abs(dev, ABS_THROTTLE, GB(16, 6));
for (j = 0; j < 8; j++)
input_report_key(dev, sw_btn[SW_ID_FFW][j], !GB(j+22,1));
input_sync(dev);
return 0;
}
return -1;
}
/*
* sw_read() reads SideWinder joystick data, and reinitializes
* the joystick in case of persistent problems. This is the function that is
* called from the generic code to poll the joystick.
*/
static int sw_read(struct sw *sw)
{
unsigned char buf[SW_LENGTH];
int i;
i = sw_read_packet(sw->gameport, buf, sw->length, 0);
if (sw->type == SW_ID_3DP && sw->length == 66 && i != 66) { /* Broken packet, try to fix */
if (i == 64 && !sw_check(sw_get_bits(buf,0,64,1))) { /* Last init failed, 1 bit mode */
printk(KERN_WARNING "sidewinder.c: Joystick in wrong mode on %s"
" - going to reinitialize.\n", sw->gameport->phys);
sw->fail = SW_FAIL; /* Reinitialize */
i = 128; /* Bogus value */
}
if (i < 66 && GB(0,64) == GB(i*3-66,64)) /* 1 == 3 */
i = 66; /* Everything is fine */
if (i < 66 && GB(0,64) == GB(66,64)) /* 1 == 2 */
i = 66; /* Everything is fine */
if (i < 66 && GB(i*3-132,64) == GB(i*3-66,64)) { /* 2 == 3 */
memmove(buf, buf + i - 22, 22); /* Move data */
i = 66; /* Carry on */
}
}
if (i == sw->length && !sw_parse(buf, sw)) { /* Parse data */
sw->fail = 0;
sw->ok++;
if (sw->type == SW_ID_3DP && sw->length == 66 /* Many packets OK */
&& sw->ok > SW_OK) {
printk(KERN_INFO "sidewinder.c: No more trouble on %s"
" - enabling optimization again.\n", sw->gameport->phys);
sw->length = 22;
}
return 0;
}
sw->ok = 0;
sw->fail++;
if (sw->type == SW_ID_3DP && sw->length == 22 && sw->fail > SW_BAD) { /* Consecutive bad packets */
printk(KERN_INFO "sidewinder.c: Many bit errors on %s"
" - disabling optimization.\n", sw->gameport->phys);
sw->length = 66;
}
if (sw->fail < SW_FAIL)
return -1; /* Not enough, don't reinitialize yet */
printk(KERN_WARNING "sidewinder.c: Too many bit errors on %s"
" - reinitializing joystick.\n", sw->gameport->phys);
if (!i && sw->type == SW_ID_3DP) { /* 3D Pro can be in analog mode */
mdelay(3 * SW_TIMEOUT);
sw_init_digital(sw->gameport);
}
mdelay(SW_TIMEOUT);
i = sw_read_packet(sw->gameport, buf, SW_LENGTH, 0); /* Read normal data packet */
mdelay(SW_TIMEOUT);
sw_read_packet(sw->gameport, buf, SW_LENGTH, i); /* Read ID packet, this initializes the stick */
sw->fail = SW_FAIL;
return -1;
}
static void sw_poll(struct gameport *gameport)
{
struct sw *sw = gameport_get_drvdata(gameport);
sw->reads++;
if (sw_read(sw))
sw->bads++;
}
static int sw_open(struct input_dev *dev)
{
struct sw *sw = input_get_drvdata(dev);
gameport_start_polling(sw->gameport);
return 0;
}
static void sw_close(struct input_dev *dev)
{
struct sw *sw = input_get_drvdata(dev);
gameport_stop_polling(sw->gameport);
}
/*
* sw_print_packet() prints the contents of a SideWinder packet.
*/
static void sw_print_packet(char *name, int length, unsigned char *buf, char bits)
{
int i;
printk(KERN_INFO "sidewinder.c: %s packet, %d bits. [", name, length);
for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
printk("%x", (int)sw_get_bits(buf, i << 2, 4, bits));
printk("]\n");
}
/*
* sw_3dp_id() translates the 3DP id into a human legible string.
* Unfortunately I don't know how to do this for the other SW types.
*/
static void sw_3dp_id(unsigned char *buf, char *comment, size_t size)
{
int i;
char pnp[8], rev[9];
for (i = 0; i < 7; i++) /* ASCII PnP ID */
pnp[i] = sw_get_bits(buf, 24+8*i, 8, 1);
for (i = 0; i < 8; i++) /* ASCII firmware revision */
rev[i] = sw_get_bits(buf, 88+8*i, 8, 1);
pnp[7] = rev[8] = 0;
snprintf(comment, size, " [PnP %d.%02d id %s rev %s]",
(int) ((sw_get_bits(buf, 8, 6, 1) << 6) | /* Two 6-bit values */
sw_get_bits(buf, 16, 6, 1)) / 100,
(int) ((sw_get_bits(buf, 8, 6, 1) << 6) |
sw_get_bits(buf, 16, 6, 1)) % 100,
pnp, rev);
}
/*
* sw_guess_mode() checks the upper two button bits for toggling -
* indication of that the joystick is in 3-bit mode. This is documented
* behavior for 3DP ID packet, and for example the FSP does this in
* normal packets instead. Fun ...
*/
static int sw_guess_mode(unsigned char *buf, int len)
{
int i;
unsigned char xor = 0;
for (i = 1; i < len; i++)
xor |= (buf[i - 1] ^ buf[i]) & 6;
return !!xor * 2 + 1;
}
/*
* sw_connect() probes for SideWinder type joysticks.
*/
static int sw_connect(struct gameport *gameport, struct gameport_driver *drv)
{
struct sw *sw;
struct input_dev *input_dev;
int i, j, k, l;
int err = 0;
unsigned char *buf = NULL; /* [SW_LENGTH] */
unsigned char *idbuf = NULL; /* [SW_LENGTH] */
unsigned char m = 1;
char comment[40];
comment[0] = 0;
sw = kzalloc(sizeof(struct sw), GFP_KERNEL);
buf = kmalloc(SW_LENGTH, GFP_KERNEL);
idbuf = kmalloc(SW_LENGTH, GFP_KERNEL);
if (!sw || !buf || !idbuf) {
err = -ENOMEM;
goto fail1;
}
sw->gameport = gameport;
gameport_set_drvdata(gameport, sw);
err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
if (err)
goto fail1;
dbg("Init 0: Opened %s, io %#x, speed %d",
gameport->phys, gameport->io, gameport->speed);
i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read normal packet */
msleep(SW_TIMEOUT);
dbg("Init 1: Mode %d. Length %d.", m , i);
if (!i) { /* No data. 3d Pro analog mode? */
sw_init_digital(gameport); /* Switch to digital */
msleep(SW_TIMEOUT);
i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
msleep(SW_TIMEOUT);
dbg("Init 1b: Length %d.", i);
if (!i) { /* No data -> FAIL */
err = -ENODEV;
goto fail2;
}
}
j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Read ID. This initializes the stick */
m |= sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
dbg("Init 2: Mode %d. ID Length %d.", m, j);
if (j <= 0) { /* Read ID failed. Happens in 1-bit mode on PP */
msleep(SW_TIMEOUT);
i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Retry reading packet */
m |= sw_guess_mode(buf, i);
dbg("Init 2b: Mode %d. Length %d.", m, i);
if (!i) {
err = -ENODEV;
goto fail2;
}
msleep(SW_TIMEOUT);
j = sw_read_packet(gameport, idbuf, SW_LENGTH, i); /* Retry reading ID */
dbg("Init 2c: ID Length %d.", j);
}
sw->type = -1;
k = SW_FAIL; /* Try SW_FAIL times */
l = 0;
do {
k--;
msleep(SW_TIMEOUT);
i = sw_read_packet(gameport, buf, SW_LENGTH, 0); /* Read data packet */
dbg("Init 3: Mode %d. Length %d. Last %d. Tries %d.", m, i, l, k);
if (i > l) { /* Longer? As we can only lose bits, it makes */
/* no sense to try detection for a packet shorter */
l = i; /* than the previous one */
sw->number = 1;
sw->gameport = gameport;
sw->length = i;
sw->bits = m;
dbg("Init 3a: Case %d.\n", i * m);
switch (i * m) {
case 60:
sw->number++;
case 45: /* Ambiguous packet length */
if (j <= 40) { /* ID length less or eq 40 -> FSP */
case 43:
sw->type = SW_ID_FSP;
break;
}
sw->number++;
case 30:
sw->number++;
case 15:
sw->type = SW_ID_GP;
break;
case 33:
case 31:
sw->type = SW_ID_FFW;
break;
case 48: /* Ambiguous */
if (j == 14) { /* ID length 14*3 -> FFP */
sw->type = SW_ID_FFP;
sprintf(comment, " [AC %s]", sw_get_bits(idbuf,38,1,3) ? "off" : "on");
} else
sw->type = SW_ID_PP;
break;
case 66:
sw->bits = 3;
case 198:
sw->length = 22;
case 64:
sw->type = SW_ID_3DP;
if (j == 160)
sw_3dp_id(idbuf, comment, sizeof(comment));
break;
}
}
} while (k && sw->type == -1);
if (sw->type == -1) {
printk(KERN_WARNING "sidewinder.c: unknown joystick device detected "
"on %s, contact <vojtech@ucw.cz>\n", gameport->phys);
sw_print_packet("ID", j * 3, idbuf, 3);
sw_print_packet("Data", i * m, buf, m);
err = -ENODEV;
goto fail2;
}
#ifdef SW_DEBUG
sw_print_packet("ID", j * 3, idbuf, 3);
sw_print_packet("Data", i * m, buf, m);
#endif
gameport_set_poll_handler(gameport, sw_poll);
gameport_set_poll_interval(gameport, 20);
k = i;
l = j;
for (i = 0; i < sw->number; i++) {
int bits, code;
snprintf(sw->name, sizeof(sw->name),
"Microsoft SideWinder %s", sw_name[sw->type]);
snprintf(sw->phys[i], sizeof(sw->phys[i]),
"%s/input%d", gameport->phys, i);
sw->dev[i] = input_dev = input_allocate_device();
if (!input_dev) {
err = -ENOMEM;
goto fail3;
}
input_dev->name = sw->name;
input_dev->phys = sw->phys[i];
input_dev->id.bustype = BUS_GAMEPORT;
input_dev->id.vendor = GAMEPORT_ID_VENDOR_MICROSOFT;
input_dev->id.product = sw->type;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &gameport->dev;
input_set_drvdata(input_dev, sw);
input_dev->open = sw_open;
input_dev->close = sw_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
for (j = 0; (bits = sw_bit[sw->type][j]); j++) {
code = sw_abs[sw->type][j];
set_bit(code, input_dev->absbit);
input_dev->absmax[code] = (1 << bits) - 1;
input_dev->absmin[code] = (bits == 1) ? -1 : 0;
input_dev->absfuzz[code] = ((bits >> 1) >= 2) ? (1 << ((bits >> 1) - 2)) : 0;
if (code != ABS_THROTTLE)
input_dev->absflat[code] = (bits >= 5) ? (1 << (bits - 5)) : 0;
}
for (j = 0; (code = sw_btn[sw->type][j]); j++)
set_bit(code, input_dev->keybit);
dbg("%s%s [%d-bit id %d data %d]\n", sw->name, comment, m, l, k);
err = input_register_device(sw->dev[i]);
if (err)
goto fail4;
}
out: kfree(buf);
kfree(idbuf);
return err;
fail4: input_free_device(sw->dev[i]);
fail3: while (--i >= 0)
input_unregister_device(sw->dev[i]);
fail2: gameport_close(gameport);
fail1: gameport_set_drvdata(gameport, NULL);
kfree(sw);
goto out;
}
static void sw_disconnect(struct gameport *gameport)
{
struct sw *sw = gameport_get_drvdata(gameport);
int i;
for (i = 0; i < sw->number; i++)
input_unregister_device(sw->dev[i]);
gameport_close(gameport);
gameport_set_drvdata(gameport, NULL);
kfree(sw);
}
static struct gameport_driver sw_drv = {
.driver = {
.name = "sidewinder",
.owner = THIS_MODULE,
},
.description = DRIVER_DESC,
.connect = sw_connect,
.disconnect = sw_disconnect,
};
static int __init sw_init(void)
{
return gameport_register_driver(&sw_drv);
}
static void __exit sw_exit(void)
{
gameport_unregister_driver(&sw_drv);
}
module_init(sw_init);
module_exit(sw_exit);
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