| /* |
| * $Id: guillemot.c,v 1.10 2002/01/22 20:28:12 vojtech Exp $ |
| * |
| * Copyright (c) 2001 Vojtech Pavlik |
| */ |
| |
| /* |
| * Guillemot Digital Interface Protocol 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/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/gameport.h> |
| #include <linux/input.h> |
| |
| #define DRIVER_DESC "Guillemot Digital joystick driver" |
| |
| MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| #define GUILLEMOT_MAX_START 600 /* 600 us */ |
| #define GUILLEMOT_MAX_STROBE 60 /* 60 us */ |
| #define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */ |
| |
| static short guillemot_abs_pad[] = |
| { ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 }; |
| |
| static short guillemot_btn_pad[] = |
| { BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 }; |
| |
| static struct { |
| int x; |
| int y; |
| } guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}}; |
| |
| struct guillemot_type { |
| unsigned char id; |
| short *abs; |
| short *btn; |
| int hat; |
| char *name; |
| }; |
| |
| struct guillemot { |
| struct gameport *gameport; |
| struct input_dev dev; |
| int bads; |
| int reads; |
| struct guillemot_type *type; |
| unsigned char length; |
| char phys[32]; |
| }; |
| |
| static struct guillemot_type guillemot_type[] = { |
| { 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" }, |
| { 0 }}; |
| |
| /* |
| * guillemot_read_packet() reads Guillemot joystick data. |
| */ |
| |
| static int guillemot_read_packet(struct gameport *gameport, u8 *data) |
| { |
| unsigned long flags; |
| unsigned char u, v; |
| unsigned int t, s; |
| int i; |
| |
| for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++) |
| data[i] = 0; |
| |
| i = 0; |
| t = gameport_time(gameport, GUILLEMOT_MAX_START); |
| s = gameport_time(gameport, GUILLEMOT_MAX_STROBE); |
| |
| local_irq_save(flags); |
| gameport_trigger(gameport); |
| v = gameport_read(gameport); |
| |
| while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) { |
| t--; |
| u = v; v = gameport_read(gameport); |
| if (v & ~u & 0x10) { |
| data[i >> 3] |= ((v >> 5) & 1) << (i & 7); |
| i++; |
| t = s; |
| } |
| } |
| |
| local_irq_restore(flags); |
| |
| return i; |
| } |
| |
| /* |
| * guillemot_poll() reads and analyzes Guillemot joystick data. |
| */ |
| |
| static void guillemot_poll(struct gameport *gameport) |
| { |
| struct guillemot *guillemot = gameport_get_drvdata(gameport); |
| struct input_dev *dev = &guillemot->dev; |
| u8 data[GUILLEMOT_MAX_LENGTH]; |
| int i; |
| |
| guillemot->reads++; |
| |
| if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 || |
| data[0] != 0x55 || data[16] != 0xaa) { |
| guillemot->bads++; |
| } else { |
| |
| for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++) |
| input_report_abs(dev, guillemot->type->abs[i], data[i + 5]); |
| |
| if (guillemot->type->hat) { |
| input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x); |
| input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y); |
| } |
| |
| for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++) |
| input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1); |
| } |
| |
| input_sync(dev); |
| } |
| |
| /* |
| * guillemot_open() is a callback from the input open routine. |
| */ |
| |
| static int guillemot_open(struct input_dev *dev) |
| { |
| struct guillemot *guillemot = dev->private; |
| |
| gameport_start_polling(guillemot->gameport); |
| return 0; |
| } |
| |
| /* |
| * guillemot_close() is a callback from the input close routine. |
| */ |
| |
| static void guillemot_close(struct input_dev *dev) |
| { |
| struct guillemot *guillemot = dev->private; |
| |
| gameport_stop_polling(guillemot->gameport); |
| } |
| |
| /* |
| * guillemot_connect() probes for Guillemot joysticks. |
| */ |
| |
| static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv) |
| { |
| struct guillemot *guillemot; |
| u8 data[GUILLEMOT_MAX_LENGTH]; |
| int i, t; |
| int err; |
| |
| if (!(guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL))) |
| return -ENOMEM; |
| |
| guillemot->gameport = gameport; |
| |
| gameport_set_drvdata(gameport, guillemot); |
| |
| err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); |
| if (err) |
| goto fail1; |
| |
| i = guillemot_read_packet(gameport, data); |
| |
| if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) { |
| err = -ENODEV; |
| goto fail2; |
| } |
| |
| for (i = 0; guillemot_type[i].name; i++) |
| if (guillemot_type[i].id == data[11]) |
| break; |
| |
| if (!guillemot_type[i].name) { |
| printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n", |
| gameport->phys, data[12], data[13], data[11], data[14], data[15]); |
| err = -ENODEV; |
| goto fail2; |
| } |
| |
| gameport_set_poll_handler(gameport, guillemot_poll); |
| gameport_set_poll_interval(gameport, 20); |
| |
| sprintf(guillemot->phys, "%s/input0", gameport->phys); |
| |
| guillemot->type = guillemot_type + i; |
| |
| guillemot->dev.private = guillemot; |
| guillemot->dev.open = guillemot_open; |
| guillemot->dev.close = guillemot_close; |
| |
| guillemot->dev.name = guillemot_type[i].name; |
| guillemot->dev.phys = guillemot->phys; |
| guillemot->dev.id.bustype = BUS_GAMEPORT; |
| guillemot->dev.id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT; |
| guillemot->dev.id.product = guillemot_type[i].id; |
| guillemot->dev.id.version = (int)data[14] << 8 | data[15]; |
| |
| guillemot->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
| |
| for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++) |
| input_set_abs_params(&guillemot->dev, t, 0, 255, 0, 0); |
| |
| if (guillemot->type->hat) { |
| input_set_abs_params(&guillemot->dev, ABS_HAT0X, -1, 1, 0, 0); |
| input_set_abs_params(&guillemot->dev, ABS_HAT0Y, -1, 1, 0, 0); |
| } |
| |
| for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++) |
| set_bit(t, guillemot->dev.keybit); |
| |
| input_register_device(&guillemot->dev); |
| printk(KERN_INFO "input: %s ver %d.%02d on %s\n", |
| guillemot->type->name, data[14], data[15], gameport->phys); |
| |
| return 0; |
| |
| fail2: gameport_close(gameport); |
| fail1: gameport_set_drvdata(gameport, NULL); |
| kfree(guillemot); |
| return err; |
| } |
| |
| static void guillemot_disconnect(struct gameport *gameport) |
| { |
| struct guillemot *guillemot = gameport_get_drvdata(gameport); |
| |
| printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys); |
| input_unregister_device(&guillemot->dev); |
| gameport_close(gameport); |
| kfree(guillemot); |
| } |
| |
| static struct gameport_driver guillemot_drv = { |
| .driver = { |
| .name = "guillemot", |
| }, |
| .description = DRIVER_DESC, |
| .connect = guillemot_connect, |
| .disconnect = guillemot_disconnect, |
| }; |
| |
| static int __init guillemot_init(void) |
| { |
| gameport_register_driver(&guillemot_drv); |
| return 0; |
| } |
| |
| static void __exit guillemot_exit(void) |
| { |
| gameport_unregister_driver(&guillemot_drv); |
| } |
| |
| module_init(guillemot_init); |
| module_exit(guillemot_exit); |