/* * 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 , or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */ #include #include #include #include #include #include #include #include #include #include /* * 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 */ 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 \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