diff options
author | Ralf Baechle <ralf@linux-mips.org> | 2000-06-25 01:20:01 +0000 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2000-06-25 01:20:01 +0000 |
commit | 3797ba0b62debb71af4606910acacc9896a9ae3b (patch) | |
tree | 414eea76253c7871bfdf3bd9d1817771eb40917c /drivers/char/joystick/grip.c | |
parent | 2b6c0c580795a4404f72d2a794214dd9e080709d (diff) |
Merge with Linux 2.4.0-test2.
Diffstat (limited to 'drivers/char/joystick/grip.c')
-rw-r--r-- | drivers/char/joystick/grip.c | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/drivers/char/joystick/grip.c b/drivers/char/joystick/grip.c new file mode 100644 index 000000000..4cedd7892 --- /dev/null +++ b/drivers/char/joystick/grip.c @@ -0,0 +1,423 @@ +/* + * $Id: grip.c,v 1.14 2000/06/06 21:13:36 vojtech Exp $ + * + * Copyright (c) 1998-2000 Vojtech Pavlik + * + * Sponsored by SuSE + */ + +/* + * Gravis/Kensington GrIP protocol joystick and gamepad 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@suse.cz>, or by paper mail: + * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/malloc.h> +#include <linux/gameport.h> +#include <linux/input.h> + +#define GRIP_MODE_GPP 1 +#define GRIP_MODE_BD 2 +#define GRIP_MODE_XT 3 +#define GRIP_MODE_DC 4 + +#define GRIP_LENGTH_GPP 24 +#define GRIP_STROBE_GPP 200 /* 200 us */ +#define GRIP_LENGTH_XT 4 +#define GRIP_STROBE_XT 64 /* 64 us */ +#define GRIP_MAX_CHUNKS_XT 10 +#define GRIP_MAX_BITS_XT 30 + +#define GRIP_REFRESH_TIME HZ/50 /* 20 ms */ + +struct grip { + struct gameport *gameport; + struct timer_list timer; + struct input_dev dev[2]; + unsigned char mode[2]; + int used; + int reads; + int bads; +}; + +static int grip_btn_gpp[] = { BTN_START, BTN_SELECT, BTN_TR2, BTN_Y, 0, BTN_TL2, BTN_A, BTN_B, BTN_X, 0, BTN_TL, BTN_TR, -1 }; +static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 }; +static int grip_btn_xt[] = { BTN_TRIGGER, BTN_THUMB, BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_SELECT, BTN_START, BTN_MODE, -1 }; +static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 }; + +static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 }; +static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; +static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 }; +static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 }; + +static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital", + "Gravis Xterminator Digital", "Gravis Xterminator DualControl" }; +static int *grip_abs[] = { 0, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc }; +static int *grip_btn[] = { 0, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc }; +static char grip_anx[] = { 0, 0, 3, 5, 5 }; +static char grip_cen[] = { 0, 0, 2, 2, 4 }; + +/* + * grip_gpp_read_packet() reads a Gravis GamePad Pro packet. + */ + +static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *data) +{ + unsigned long flags; + unsigned char u, v; + unsigned int t; + int i; + + int strobe = gameport_time(gameport, GRIP_STROBE_GPP); + + data[0] = 0; + t = strobe; + i = 0; + + __save_flags(flags); + __cli(); + + v = gameport_read(gameport) >> shift; + + do { + t--; + u = v; v = (gameport_read(gameport) >> shift) & 3; + if (~v & u & 1) { + data[0] |= (v >> 1) << i++; + t = strobe; + } + } while (i < GRIP_LENGTH_GPP && t > 0); + + __restore_flags(flags); + + if (i < GRIP_LENGTH_GPP) return -1; + + for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++) + data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1); + + return -(i == GRIP_LENGTH_GPP); +} + +/* + * grip_xt_read_packet() reads a Gravis Xterminator packet. + */ + +static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data) +{ + unsigned int i, j, buf, crc; + unsigned char u, v, w; + unsigned long flags; + unsigned int t; + char status; + + int strobe = gameport_time(gameport, GRIP_STROBE_XT); + + data[0] = data[1] = data[2] = data[3] = 0; + status = buf = i = j = 0; + t = strobe; + + __save_flags(flags); + __cli(); + + v = w = (gameport_read(gameport) >> shift) & 3; + + do { + t--; + u = (gameport_read(gameport) >> shift) & 3; + + if (u ^ v) { + + if ((u ^ v) & 1) { + buf = (buf << 1) | (u >> 1); + t = strobe; + i++; + } else + + if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) { + if (i == 20) { + crc = buf ^ (buf >> 7) ^ (buf >> 14); + if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) { + data[buf >> 18] = buf >> 4; + status |= 1 << (buf >> 18); + } + j++; + } + t = strobe; + buf = 0; + i = 0; + } + w = v; + v = u; + } + + } while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0); + + __restore_flags(flags); + + return -(status != 0xf); +} + +/* + * grip_timer() repeatedly polls the joysticks and generates events. + */ + +static void grip_timer(unsigned long private) +{ + struct grip *grip = (void*) private; + unsigned int data[GRIP_LENGTH_XT]; + struct input_dev *dev; + int i, j; + + for (i = 0; i < 2; i++) { + + dev = grip->dev + i; + grip->reads++; + + switch (grip->mode[i]) { + + case GRIP_MODE_GPP: + + if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) { + grip->bads++; + break; + } + + input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1)); + input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1)); + + for (j = 0; j < 12; j++) + if (grip_btn_gpp[j]) + input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1); + + break; + + case GRIP_MODE_BD: + + if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { + grip->bads++; + break; + } + + input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); + input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); + input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); + + input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); + input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); + + for (j = 0; j < 5; j++) + input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1); + + break; + + case GRIP_MODE_XT: + + if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { + grip->bads++; + break; + } + + input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); + input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f)); + input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f); + input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f); + input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); + + input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); + input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); + input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1)); + input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1)); + + for (j = 0; j < 11; j++) + input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1); + break; + + case GRIP_MODE_DC: + + if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) { + grip->bads++; + break; + } + + input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f); + input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f); + input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f); + input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f); + input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f); + + input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1)); + input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1)); + + for (j = 0; j < 9; j++) + input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1); + break; + + + } + } + + mod_timer(&grip->timer, jiffies + GRIP_REFRESH_TIME); +} + +static int grip_open(struct input_dev *dev) +{ + struct grip *grip = dev->private; + if (!grip->used++) + mod_timer(&grip->timer, jiffies + GRIP_REFRESH_TIME); + return 0; +} + +static void grip_close(struct input_dev *dev) +{ + struct grip *grip = dev->private; + if (!--grip->used) + del_timer(&grip->timer); +} + +static void grip_connect(struct gameport *gameport, struct gameport_dev *dev) +{ + struct grip *grip; + unsigned int data[GRIP_LENGTH_XT]; + int i, j, t; + + if (!(grip = kmalloc(sizeof(struct grip), GFP_KERNEL))) + return; + memset(grip, 0, sizeof(struct grip)); + + gameport->private = grip; + + grip->gameport = gameport; + init_timer(&grip->timer); + grip->timer.data = (long) grip; + grip->timer.function = grip_timer; + + if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW)) + goto fail1; + + for (i = 0; i < 2; i++) { + if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) { + grip->mode[i] = GRIP_MODE_GPP; + continue; + } + if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) { + if (!(data[3] & 7)) { + grip->mode[i] = GRIP_MODE_BD; + continue; + } + if (!(data[2] & 0xf0)) { + grip->mode[i] = GRIP_MODE_XT; + continue; + } + grip->mode[i] = GRIP_MODE_DC; + continue; + } + } + + if (!grip->mode[0] && !grip->mode[1]) + goto fail2; + + for (i = 0; i < 2; i++) + if (grip->mode[i]) { + + grip->dev[i].private = grip; + + grip->dev[i].open = grip_open; + grip->dev[i].close = grip_close; + + grip->dev[i].name = grip_name[grip->mode[i]]; + grip->dev[i].idbus = BUS_GAMEPORT; + grip->dev[i].idvendor = GAMEPORT_ID_VENDOR_GRAVIS; + grip->dev[i].idproduct = grip->mode[i]; + grip->dev[i].idversion = 0x0100; + + grip->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); + + for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) { + + set_bit(t, grip->dev[i].absbit); + + if (j < grip_cen[grip->mode[i]]) { + grip->dev[i].absmin[t] = 14; + grip->dev[i].absmax[t] = 52; + grip->dev[i].absfuzz[t] = 1; + grip->dev[i].absflat[t] = 2; + continue; + } + + if (j < grip_anx[grip->mode[i]]) { + grip->dev[i].absmin[t] = 3; + grip->dev[i].absmax[t] = 57; + grip->dev[i].absfuzz[t] = 1; + continue; + } + + grip->dev[i].absmin[t] = -1; + grip->dev[i].absmax[t] = 1; + } + + for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++) + if (t > 0) + set_bit(t, grip->dev[i].keybit); + + input_register_device(grip->dev + i); + + printk(KERN_INFO "input%d: %s on gameport%d.%d\n", + grip->dev[i].number, grip_name[grip->mode[i]], gameport->number, i); + } + + return; +fail2: gameport_close(gameport); +fail1: kfree(grip); +} + +static void grip_disconnect(struct gameport *gameport) +{ + int i; + + struct grip *grip = gameport->private; + for (i = 0; i < 2; i++) + if (grip->mode[i]) + input_unregister_device(grip->dev + i); + gameport_close(gameport); + kfree(grip); +} + +static struct gameport_dev grip_dev = { + connect: grip_connect, + disconnect: grip_disconnect, +}; + +int __init grip_init(void) +{ + gameport_register_device(&grip_dev); + return 0; +} + +void __exit grip_exit(void) +{ + gameport_unregister_device(&grip_dev); +} + +module_init(grip_init); +module_exit(grip_exit); |