patch-2.4.0-test2 linux/drivers/char/joystick/joy-sidewinder.c
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- Lines: 856
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test1/linux/drivers/char/joystick/joy-sidewinder.c
- Orig date:
Wed Dec 8 14:11:26 1999
diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/joy-sidewinder.c linux/drivers/char/joystick/joy-sidewinder.c
@@ -1,855 +0,0 @@
-/*
- * joy-sidewinder.c Version 1.2
- *
- * Copyright (c) 1998-1999 Vojtech Pavlik
- *
- * Sponsored by SuSE
- */
-
-/*
- * This is a module for the Linux joystick driver, supporting
- * Microsoft SideWinder digital joystick family.
- */
-
-/*
- * 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@suse.cz>, or by paper mail:
- * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
- */
-
-#include <asm/io.h>
-#include <asm/system.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/joystick.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/init.h>
-
-/*
- * These are really magic values. Changing them can make a problem go away,
- * as well as break everything.
- */
-
-#undef JS_SW_DEBUG
-
-#define JS_SW_START 400 /* The time we wait for the first bit [400 us] */
-#define JS_SW_STROBE 45 /* Max time per bit [45 us] */
-#define JS_SW_TIMEOUT 4000 /* Wait for everything to settle [4 ms] */
-#define JS_SW_KICK 45 /* Wait after A0 fall till kick [45 us] */
-#define JS_SW_END 8 /* Number of bits before end of packet to kick */
-#define JS_SW_FAIL 16 /* Number of packet read errors to fail and reinitialize */
-#define JS_SW_BAD 2 /* Number of packet read errors to switch off 3d Pro optimization */
-#define JS_SW_OK 64 /* Number of packet read successes to switch optimization back on */
-#define JS_SW_LENGTH 512 /* Max number of bits in a packet */
-
-/*
- * SideWinder joystick types ...
- */
-
-#define JS_SW_TYPE_3DP 1
-#define JS_SW_TYPE_F23 2
-#define JS_SW_TYPE_GP 3
-#define JS_SW_TYPE_PP 4
-#define JS_SW_TYPE_FFP 5
-#define JS_SW_TYPE_FSP 6
-#define JS_SW_TYPE_FFW 7
-
-static int js_sw_port_list[] __initdata = {0x201, 0};
-static struct js_port* js_sw_port __initdata = NULL;
-
-static struct {
- int x;
- int y;
-} js_sw_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
-
-struct js_sw_info {
- int io;
- int length;
- int speed;
- unsigned char type;
- unsigned char bits;
- unsigned char number;
- unsigned char fail;
- unsigned char ok;
-};
-
-/*
- * Gameport speed.
- */
-
-unsigned int js_sw_io_speed = 0;
-
-/*
- * js_sw_measure_speed() measures the gameport i/o speed.
- */
-
-static int __init js_sw_measure_speed(int io)
-{
-#ifdef __i386__
-
-#define GET_TIME(x) do { outb(0, 0x43); x = inb(0x40); x |= inb(0x40) << 8; } while (0)
-#define DELTA(x,y) ((y)-(x)+((y)<(x)?1193180L/HZ:0))
-
- unsigned int i, t, t1, t2, t3, tx;
- unsigned long flags;
-
- tx = 1 << 30;
-
- for(i = 0; i < 50; i++) {
- save_flags(flags); /* Yes, all CPUs */
- cli();
- GET_TIME(t1);
- for(t = 0; t < 50; t++) inb(io);
- GET_TIME(t2);
- GET_TIME(t3);
- restore_flags(flags);
- udelay(i * 10);
- if ((t = DELTA(t2,t1) - DELTA(t3,t2)) < tx) tx = t;
- }
-
- return 59659 / t;
-
-#else
-
- unsigned int j, t = 0;
-
- j = jiffies; while (j == jiffies);
- j = jiffies; while (j == jiffies) { t++; inb(0x201); }
-
- return t * HZ / 1000;
-
-#endif
-}
-
-/*
- * js_sw_read_packet() is a function which reads either a data packet, or an
- * identification packet from a SideWinder joystick. Better don't try to
- * understand this, since all the ugliness of the Microsoft Digital
- * Overdrive protocol is concentrated in this function. If you really want
- * to know how this works, first go watch a couple horror movies, so that
- * you are well prepared, read US patent #5628686 and then e-mail me,
- * and I'll send you an explanation.
- * Vojtech <vojtech@suse.cz>
- */
-
-static int js_sw_read_packet(int io, int speed, 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 ? (JS_SW_TIMEOUT * speed) >> 10 : 0; /* Set up global timeout for ID packet */
- kick = id ? (JS_SW_KICK * speed) >> 10 : 0; /* Set up kick timeout for ID packet */
- start = (JS_SW_START * speed) >> 10;
- strobe = (JS_SW_STROBE * speed) >> 10;
- bitout = start;
- pending = 0;
- sched = 0;
-
- __save_flags(flags); /* Quiet, please */
- __cli();
-
- outb(0xff, io); /* Trigger */
- v = inb(io);
-
- do {
- bitout--;
- u = v;
- v = inb(io);
- } 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 = inb(io);
-
- 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 > -JS_SW_END)) { /* Second trigger time */
- outb(0xff, io); /* Trigger */
- bitout = start; /* Long bit timeout */
- pending = 0; /* Unmark schedule */
- timeout = 0; /* Switch from global to bit timeouts */
- }
- }
-
- __restore_flags(flags); /* Done - relax */
-
-#ifdef JS_SW_DEBUG
- {
- int j;
- printk(KERN_DEBUG "joy-sidewinder: Read %d triplets. [", i);
- for (j = 0; j < i; j++) printk("%d", buf[j]);
- printk("]\n");
- }
-#endif
-
- return i;
-}
-
-/*
- * js_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,shift) js_sw_get_bits(buf, pos, num, shift, info->bits)
-
-static __u64 js_sw_get_bits(unsigned char *buf, int pos, int num, char shift, char bits)
-{
- __u64 data = 0;
- int tri = pos % bits; /* Start position */
- int i = pos / bits;
- int bit = shift;
-
- while (num--) {
- data |= (__u64)((buf[i] >> tri++) & 1) << bit++; /* Transfer bit */
- if (tri == bits) {
- i++; /* Next triplet */
- tri = 0;
- }
- }
-
- return data;
-}
-
-/*
- * js_sw_init_digital() initializes a SideWinder 3D Pro joystick
- * into digital mode.
- */
-
-static void js_sw_init_digital(int io, int speed)
-{
- int seq[] = { 140, 140+725, 140+300, 0 };
- unsigned long flags;
- int i, t;
-
- __save_flags(flags);
- __cli();
-
- i = 0;
- do {
- outb(0xff, io); /* Trigger */
- t = (JS_SW_TIMEOUT * speed) >> 10;
- while ((inb(io) & 1) && t) t--; /* Wait for axis to fall back to 0 */
- udelay(seq[i]); /* Delay magic time */
- } while (seq[++i]);
-
- outb(0xff, io); /* Last trigger */
-
- __restore_flags(flags);
-}
-
-/*
- * js_sw_parity() computes parity of __u64
- */
-
-static int js_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;
-}
-
-/*
- * js_sw_ccheck() checks synchronization bits and computes checksum of nibbles.
- */
-
-static int js_sw_check(__u64 t)
-{
- char sum = 0;
-
- if ((t & 0x8080808080808080ULL) ^ 0x80) /* Sync */
- return -1;
-
- while (t) { /* Sum */
- sum += t & 0xf;
- t >>= 4;
- }
-
- return sum & 0xf;
-}
-
-/*
- * js_sw_parse() analyzes SideWinder joystick data, and writes the results into
- * the axes and buttons arrays.
- */
-
-static int js_sw_parse(unsigned char *buf, struct js_sw_info *info, int **axes, int **buttons)
-{
- int hat, i;
-
- switch (info->type) {
-
- case JS_SW_TYPE_3DP:
- case JS_SW_TYPE_F23:
-
- if (js_sw_check(GB(0,64,0)) || (hat = GB(6,1,3) | GB(60,3,0)) > 8) return -1;
-
- axes[0][0] = GB( 3,3,7) | GB(16,7,0);
- axes[0][1] = GB( 0,3,7) | GB(24,7,0);
- axes[0][2] = GB(35,2,7) | GB(40,7,0);
- axes[0][3] = GB(32,3,7) | GB(48,7,0);
- axes[0][4] = js_sw_hat_to_axis[hat].x;
- axes[0][5] = js_sw_hat_to_axis[hat].y;
- buttons[0][0] = ~(GB(37,1,8) | GB(38,1,7) | GB(8,7,0));
-
- return 0;
-
- case JS_SW_TYPE_GP:
-
- for (i = 0; i < info->number * 15; i += 15) {
-
- if (js_sw_parity(GB(i,15,0))) return -1;
-
- axes[i][0] = GB(i+3,1,0) - GB(i+2,1,0);
- axes[i][1] = GB(i+0,1,0) - GB(i+1,1,0);
- buttons[i][0] = ~GB(i+4,10,0);
-
- }
-
- return 0;
-
- case JS_SW_TYPE_PP:
- case JS_SW_TYPE_FFP:
-
- if (!js_sw_parity(GB(0,48,0)) || (hat = GB(42,4,0)) > 8) return -1;
-
- axes[0][0] = GB( 9,10,0);
- axes[0][1] = GB(19,10,0);
- axes[0][2] = GB(36, 6,0);
- axes[0][3] = GB(29, 7,0);
- axes[0][4] = js_sw_hat_to_axis[hat].x;
- axes[0][5] = js_sw_hat_to_axis[hat].y;
- buttons[0][0] = ~GB(0,9,0);
-
- return 0;
-
- case JS_SW_TYPE_FSP:
-
- if (!js_sw_parity(GB(0,43,0)) || (hat = GB(28,4,0)) > 8) return -1;
-
- axes[0][0] = GB( 0,10,0);
- axes[0][1] = GB(16,10,0);
- axes[0][2] = GB(32, 6,0);
- axes[0][3] = js_sw_hat_to_axis[hat].x;
- axes[0][4] = js_sw_hat_to_axis[hat].y;
- buttons[0][0] = ~(GB(10,6,0) | GB(26,2,6) | GB(38,2,8));
-
- return 0;
-
- case JS_SW_TYPE_FFW:
-
- if (!js_sw_parity(GB(0,33,0))) return -1;
-
- axes[0][0] = GB( 0,10,0);
- axes[0][1] = GB(10, 6,0);
- axes[0][2] = GB(16, 6,0);
- buttons[0][0] = ~GB(22,8,0);
-
- return 0;
- }
-
- return -1;
-}
-
-/*
- * js_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 js_sw_read(void *xinfo, int **axes, int **buttons)
-{
- struct js_sw_info *info = xinfo;
- unsigned char buf[JS_SW_LENGTH];
- int i;
-
- i = js_sw_read_packet(info->io, info->speed, buf, info->length, 0);
-
- if (info->type <= JS_SW_TYPE_F23 && info->length == 66 && i != 66) { /* Broken packet, try to fix */
-
- if (i == 64 && !js_sw_check(js_sw_get_bits(buf,0,64,0,1))) { /* Last init failed, 1 bit mode */
- printk(KERN_WARNING "joy-sidewinder: Joystick in wrong mode on %#x"
- " - going to reinitialize.\n", info->io);
- info->fail = JS_SW_FAIL; /* Reinitialize */
- i = 128; /* Bogus value */
- }
-
- if (i < 66 && GB(0,64,0) == GB(i*3-66,64,0)) /* 1 == 3 */
- i = 66; /* Everything is fine */
-
- if (i < 66 && GB(0,64,0) == GB(66,64,0)) /* 1 == 2 */
- i = 66; /* Everything is fine */
-
- if (i < 66 && GB(i*3-132,64,0) == GB(i*3-66,64,0)) { /* 2 == 3 */
- memmove(buf, buf + i - 22, 22); /* Move data */
- i = 66; /* Carry on */
- }
- }
-
- if (i == info->length && !js_sw_parse(buf, info, axes, buttons)) { /* Parse data */
-
- info->fail = 0;
- info->ok++;
-
- if (info->type <= JS_SW_TYPE_F23 && info->length == 66 /* Many packets OK */
- && info->ok > JS_SW_OK) {
-
- printk(KERN_INFO "joy-sidewinder: No more trouble on %#x"
- " - enabling optimization again.\n", info->io);
- info->length = 22;
- }
-
- return 0;
- }
-
- info->ok = 0;
- info->fail++;
-
- if (info->type <= JS_SW_TYPE_F23 && info->length == 22 /* Consecutive bad packets */
- && info->fail > JS_SW_BAD) {
-
- printk(KERN_INFO "joy-sidewinder: Many bit errors on %#x"
- " - disabling optimization.\n", info->io);
- info->length = 66;
- }
-
- if (info->fail < JS_SW_FAIL) return -1; /* Not enough, don't reinitialize yet */
-
- printk(KERN_WARNING "joy-sidewinder: Too many bit errors on %#x"
- " - reinitializing joystick.\n", info->io);
-
- if (!i && info->type <= JS_SW_TYPE_F23) { /* 3D Pro can be in analog mode */
- udelay(3 * JS_SW_TIMEOUT);
- js_sw_init_digital(info->io, info->speed);
- }
-
- udelay(JS_SW_TIMEOUT);
- i = js_sw_read_packet(info->io, info->speed, buf, JS_SW_LENGTH, 0); /* Read normal data packet */
- udelay(JS_SW_TIMEOUT);
- js_sw_read_packet(info->io, info->speed, buf, JS_SW_LENGTH, i); /* Read ID packet, this initializes the stick */
-
- info->fail = JS_SW_FAIL;
-
- return -1;
-}
-
-/*
- * js_sw_open() is a callback from the file open routine.
- */
-
-static int js_sw_open(struct js_dev *jd)
-{
- MOD_INC_USE_COUNT;
- return 0;
-}
-
-/*
- * js_sw_close() is a callback from the file release routine.
- */
-
-static int js_sw_close(struct js_dev *jd)
-{
- MOD_DEC_USE_COUNT;
- return 0;
-}
-
-/*
- * js_sw_init_corr() initializes the correction values for
- * SideWinders.
- */
-
-static void __init js_sw_init_corr(int num_axes, int type, int number, struct js_corr **corr)
-{
- int i, j;
-
- for (i = 0; i < number; i++) {
-
- for (j = 0; j < num_axes; j++) {
- corr[i][j].type = JS_CORR_BROKEN;
- corr[i][j].prec = 8;
- corr[i][j].coef[0] = 511 - 32;
- corr[i][j].coef[1] = 512 + 32;
- corr[i][j].coef[2] = (1 << 29) / (511 - 32);
- corr[i][j].coef[3] = (1 << 29) / (511 - 32);
- }
-
- switch (type) {
-
- case JS_SW_TYPE_3DP:
- case JS_SW_TYPE_F23:
-
- corr[i][2].type = JS_CORR_BROKEN;
- corr[i][2].prec = 4;
- corr[i][2].coef[0] = 255 - 16;
- corr[i][2].coef[1] = 256 + 16;
- corr[i][2].coef[2] = (1 << 29) / (255 - 16);
- corr[i][2].coef[3] = (1 << 29) / (255 - 16);
-
- j = 4;
-
- break;
-
- case JS_SW_TYPE_PP:
- case JS_SW_TYPE_FFP:
-
- corr[i][2].type = JS_CORR_BROKEN;
- corr[i][2].prec = 0;
- corr[i][2].coef[0] = 31 - 2;
- corr[i][2].coef[1] = 32 + 2;
- corr[i][2].coef[2] = (1 << 29) / (31 - 2);
- corr[i][2].coef[3] = (1 << 29) / (31 - 2);
-
- corr[i][3].type = JS_CORR_BROKEN;
- corr[i][3].prec = 1;
- corr[i][3].coef[0] = 63 - 4;
- corr[i][3].coef[1] = 64 + 4;
- corr[i][3].coef[2] = (1 << 29) / (63 - 4);
- corr[i][3].coef[3] = (1 << 29) / (63 - 4);
-
- j = 4;
-
- break;
-
- case JS_SW_TYPE_FFW:
-
- corr[i][0].type = JS_CORR_BROKEN;
- corr[i][0].prec = 2;
- corr[i][0].coef[0] = 511 - 8;
- corr[i][0].coef[1] = 512 + 8;
- corr[i][0].coef[2] = (1 << 29) / (511 - 8);
- corr[i][0].coef[3] = (1 << 29) / (511 - 8);
-
- corr[i][1].type = JS_CORR_BROKEN;
- corr[i][1].prec = 1;
- corr[i][1].coef[0] = 63;
- corr[i][1].coef[1] = 63;
- corr[i][1].coef[2] = (1 << 29) / -63;
- corr[i][1].coef[3] = (1 << 29) / -63;
-
- corr[i][2].type = JS_CORR_BROKEN;
- corr[i][2].prec = 1;
- corr[i][2].coef[0] = 63;
- corr[i][2].coef[1] = 63;
- corr[i][2].coef[2] = (1 << 29) / -63;
- corr[i][2].coef[3] = (1 << 29) / -63;
-
- j = 3;
-
- break;
-
- case JS_SW_TYPE_FSP:
-
- corr[i][2].type = JS_CORR_BROKEN;
- corr[i][2].prec = 0;
- corr[i][2].coef[0] = 31 - 2;
- corr[i][2].coef[1] = 32 + 2;
- corr[i][2].coef[2] = (1 << 29) / (31 - 2);
- corr[i][2].coef[3] = (1 << 29) / (31 - 2);
-
- j = 3;
-
- break;
-
- default:
-
- j = 0;
- }
-
- for (; j < num_axes; j++) { /* Hats & other binary axes */
- corr[i][j].type = JS_CORR_BROKEN;
- corr[i][j].prec = 0;
- corr[i][j].coef[0] = 0;
- corr[i][j].coef[1] = 0;
- corr[i][j].coef[2] = (1 << 29);
- corr[i][j].coef[3] = (1 << 29);
- }
- }
-}
-
-/*
- * js_sw_print_packet() prints the contents of a SideWinder packet.
- */
-
-static void js_sw_print_packet(char *name, int length, unsigned char *buf, char bits)
-{
- int i;
-
- printk("joy-sidewinder: %s packet, %d bits. [", name, length);
- for (i = (((length + 3) >> 2) - 1); i >= 0; i--)
- printk("%x", (int)js_sw_get_bits(buf, i << 2, 4, 0, bits));
- printk("]\n");
-}
-
-/*
- * js_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 js_sw_3dp_id(unsigned char *buf, char *comment)
-{
- int i;
- char pnp[8], rev[9];
-
- for (i = 0; i < 7; i++) /* ASCII PnP ID */
- pnp[i] = js_sw_get_bits(buf, 24+8*i, 8, 0, 1);
-
- for (i = 0; i < 8; i++) /* ASCII firmware revision */
- rev[i] = js_sw_get_bits(buf, 88+8*i, 8, 0, 1);
-
- pnp[7] = rev[8] = 0;
-
- sprintf(comment, " [PnP %d.%02d id %s rev %s]",
- (int) (js_sw_get_bits(buf, 8, 6, 6, 1) | /* Two 6-bit values */
- js_sw_get_bits(buf, 16, 6, 0, 1)) / 100,
- (int) (js_sw_get_bits(buf, 8, 6, 6, 1) |
- js_sw_get_bits(buf, 16, 6, 0, 1)) % 100,
- pnp, rev);
-}
-
-/*
- * js_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 js_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;
-}
-
-/*
- * js_sw_probe() probes for SideWinder type joysticks.
- */
-
-static struct js_port __init *js_sw_probe(int io, struct js_port *port)
-{
- struct js_sw_info info;
- char *names[] = {NULL, "SideWinder 3D Pro", "Flight2000 F-23", "SideWinder GamePad", "SideWinder Precision Pro",
- "SideWinder Force Feedback Pro", "SideWinder FreeStyle Pro", "SideWinder Force Feedback Wheel" };
- char axes[] = { 0, 6, 6, 2, 6, 6, 5, 3 };
- char buttons[] = { 0, 9, 9, 10, 9, 9, 10, 8 };
- int i, j, k, l, speed;
- unsigned char buf[JS_SW_LENGTH];
- unsigned char idbuf[JS_SW_LENGTH];
- unsigned char m = 1;
- char comment[40];
-
- comment[0] = 0;
-
- if (check_region(io, 1)) return port;
-
- speed = js_sw_measure_speed(io);
-
- i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Read normal packet */
- m |= js_sw_guess_mode(buf, i); /* Data packet (1-bit) can carry mode info [FSP] */
- udelay(JS_SW_TIMEOUT);
-
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 1: Mode %d. Length %d.\n", m , i);
-#endif
-
- if (!i) { /* No data. 3d Pro analog mode? */
- js_sw_init_digital(io, speed); /* Switch to digital */
- udelay(JS_SW_TIMEOUT);
- i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Retry reading packet */
- udelay(JS_SW_TIMEOUT);
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 1b: Length %d.\n", i);
-#endif
- if (!i) return port; /* No data -> FAIL */
- }
-
- j = js_sw_read_packet(io, speed, idbuf, JS_SW_LENGTH, i); /* Read ID. This initializes the stick */
- m |= js_sw_guess_mode(idbuf, j); /* ID packet should carry mode info [3DP] */
-
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 2: Mode %d. ID Length %d.\n", m , j);
-#endif
-
- if (!j) { /* Read ID failed. Happens in 1-bit mode on PP */
- udelay(JS_SW_TIMEOUT);
- i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Retry reading packet */
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 2b: Mode %d. Length %d.\n", m , i);
-#endif
- if (!i) return port;
- udelay(JS_SW_TIMEOUT);
- j = js_sw_read_packet(io, speed, idbuf, JS_SW_LENGTH, i);/* Retry reading ID */
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 2c: ID Length %d.\n", j);
-#endif
-
- }
-
- k = JS_SW_FAIL; /* Try JS_SW_FAIL times */
- l = 0;
-
- do {
- k--;
- udelay(JS_SW_TIMEOUT);
- i = js_sw_read_packet(io, speed, buf, JS_SW_LENGTH, 0); /* Read data packet */
-#ifdef JS_SW_DEBUG
- printk(KERN_DEBUG "joy-sidewinder: Init 3: Length %d.\n", i);
-#endif
-
- 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 */
-
- info.number = 1;
- info.io = io;
- info.speed = speed;
- info.length = i;
- info.bits = m;
- info.fail = 0;
- info.ok = 0;
- info.type = 0;
-
- switch (i * m) {
- case 60:
- info.number++;
- case 45: /* Ambiguous packet length */
- if (j <= 40) { /* ID length less or eq 40 -> FSP */
- case 43:
- info.type = JS_SW_TYPE_FSP;
- break;
- }
- info.number++;
- case 30:
- info.number++;
- case 15:
- info.type = JS_SW_TYPE_GP;
- break;
- case 33:
- case 31:
- info.type = JS_SW_TYPE_FFW;
- break;
- case 48: /* Ambiguous */
- if (j == 14) { /* ID lenght 14*3 -> FFP */
- info.type = JS_SW_TYPE_FFP;
- sprintf(comment, " [AC %s]", js_sw_get_bits(idbuf,38,1,0,3) ? "off" : "on");
- } else
- info.type = JS_SW_TYPE_PP;
- break;
- case 198:
- info.length = 22;
- case 64:
- info.type = JS_SW_TYPE_3DP;
- if (j == 160) js_sw_3dp_id(idbuf, comment);
- break;
- }
- }
-
- } while (k && !info.type);
-
- if (!info.type) {
- printk(KERN_WARNING "joy-sidewinder: unknown joystick device detected "
- "(io=%#x), contact <vojtech@suse.cz>\n", io);
- js_sw_print_packet("ID", j * 3, idbuf, 3);
- js_sw_print_packet("Data", i * m, buf, m);
- return port;
- }
-
-#ifdef JS_SW_DEBUG
- js_sw_print_packet("ID", j * 3, idbuf, 3);
- js_sw_print_packet("Data", i * m, buf, m);
-#endif
-
- k = i;
-
- request_region(io, 1, "joystick (sidewinder)");
-
- port = js_register_port(port, &info, info.number, sizeof(struct js_sw_info), js_sw_read);
-
- for (i = 0; i < info.number; i++)
- printk(KERN_INFO "js%d: %s%s at %#x [%d ns res %d-bit id %d data %d]\n",
- js_register_device(port, i, axes[info.type], buttons[info.type],
- names[info.type], js_sw_open, js_sw_close), names[info.type], comment, io,
- 1000000 / speed, m, j, k);
-
- js_sw_init_corr(axes[info.type], info.type, info.number, port->corr);
-
- return port;
-}
-
-#ifdef MODULE
-int init_module(void)
-#else
-int __init js_sw_init(void)
-#endif
-{
- int *p;
-
- for (p = js_sw_port_list; *p; p++) js_sw_port = js_sw_probe(*p, js_sw_port);
- if (js_sw_port) return 0;
-
-#ifdef MODULE
- printk(KERN_WARNING "joy-sidewinder: no joysticks found\n");
-#endif
-
- return -ENODEV;
-}
-
-#ifdef MODULE
-void cleanup_module(void)
-{
- int i;
- struct js_sw_info *info;
-
- while (js_sw_port) {
- for (i = 0; i < js_sw_port->ndevs; i++)
- if (js_sw_port->devs[i])
- js_unregister_device(js_sw_port->devs[i]);
- info = js_sw_port->info;
- release_region(info->io, 1);
- js_sw_port = js_unregister_port(js_sw_port);
- }
-
-}
-#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)