280 lines
7 KiB
C
280 lines
7 KiB
C
/*
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* Copyright (c) 2001 Vojtech Pavlik
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*/
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/*
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* Guillemot Digital Interface Protocol driver for Linux
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/gameport.h>
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#include <linux/input.h>
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#include <linux/jiffies.h>
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#define DRIVER_DESC "Guillemot Digital joystick driver"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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#define GUILLEMOT_MAX_START 600 /* 600 us */
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#define GUILLEMOT_MAX_STROBE 60 /* 60 us */
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#define GUILLEMOT_MAX_LENGTH 17 /* 17 bytes */
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static short guillemot_abs_pad[] =
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{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, -1 };
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static short guillemot_btn_pad[] =
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{ BTN_A, BTN_B, BTN_C, BTN_X, BTN_Y, BTN_Z, BTN_TL, BTN_TR, BTN_MODE, BTN_SELECT, -1 };
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static struct {
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int x;
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int y;
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} guillemot_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
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struct guillemot_type {
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unsigned char id;
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short *abs;
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short *btn;
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int hat;
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char *name;
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};
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struct guillemot {
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struct gameport *gameport;
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struct input_dev *dev;
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int bads;
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int reads;
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struct guillemot_type *type;
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unsigned char length;
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char phys[32];
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};
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static struct guillemot_type guillemot_type[] = {
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{ 0x00, guillemot_abs_pad, guillemot_btn_pad, 1, "Guillemot Pad" },
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{ 0 }};
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/*
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* guillemot_read_packet() reads Guillemot joystick data.
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*/
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static int guillemot_read_packet(struct gameport *gameport, u8 *data)
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{
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unsigned long flags;
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unsigned char u, v;
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unsigned int t, s;
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int i;
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for (i = 0; i < GUILLEMOT_MAX_LENGTH; i++)
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data[i] = 0;
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i = 0;
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t = gameport_time(gameport, GUILLEMOT_MAX_START);
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s = gameport_time(gameport, GUILLEMOT_MAX_STROBE);
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local_irq_save(flags);
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gameport_trigger(gameport);
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v = gameport_read(gameport);
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while (t > 0 && i < GUILLEMOT_MAX_LENGTH * 8) {
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t--;
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u = v; v = gameport_read(gameport);
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if (v & ~u & 0x10) {
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data[i >> 3] |= ((v >> 5) & 1) << (i & 7);
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i++;
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t = s;
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}
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}
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local_irq_restore(flags);
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return i;
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}
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/*
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* guillemot_poll() reads and analyzes Guillemot joystick data.
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*/
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static void guillemot_poll(struct gameport *gameport)
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{
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struct guillemot *guillemot = gameport_get_drvdata(gameport);
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struct input_dev *dev = guillemot->dev;
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u8 data[GUILLEMOT_MAX_LENGTH];
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int i;
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guillemot->reads++;
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if (guillemot_read_packet(guillemot->gameport, data) != GUILLEMOT_MAX_LENGTH * 8 ||
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data[0] != 0x55 || data[16] != 0xaa) {
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guillemot->bads++;
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} else {
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for (i = 0; i < 6 && guillemot->type->abs[i] >= 0; i++)
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input_report_abs(dev, guillemot->type->abs[i], data[i + 5]);
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if (guillemot->type->hat) {
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input_report_abs(dev, ABS_HAT0X, guillemot_hat_to_axis[data[4] >> 4].x);
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input_report_abs(dev, ABS_HAT0Y, guillemot_hat_to_axis[data[4] >> 4].y);
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}
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for (i = 0; i < 16 && guillemot->type->btn[i] >= 0; i++)
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input_report_key(dev, guillemot->type->btn[i], (data[2 + (i >> 3)] >> (i & 7)) & 1);
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}
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input_sync(dev);
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}
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/*
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* guillemot_open() is a callback from the input open routine.
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*/
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static int guillemot_open(struct input_dev *dev)
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{
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struct guillemot *guillemot = input_get_drvdata(dev);
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gameport_start_polling(guillemot->gameport);
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return 0;
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}
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/*
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* guillemot_close() is a callback from the input close routine.
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*/
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static void guillemot_close(struct input_dev *dev)
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{
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struct guillemot *guillemot = input_get_drvdata(dev);
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gameport_stop_polling(guillemot->gameport);
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}
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/*
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* guillemot_connect() probes for Guillemot joysticks.
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*/
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static int guillemot_connect(struct gameport *gameport, struct gameport_driver *drv)
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{
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struct guillemot *guillemot;
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struct input_dev *input_dev;
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u8 data[GUILLEMOT_MAX_LENGTH];
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int i, t;
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int err;
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guillemot = kzalloc(sizeof(struct guillemot), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!guillemot || !input_dev) {
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err = -ENOMEM;
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goto fail1;
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}
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guillemot->gameport = gameport;
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guillemot->dev = input_dev;
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gameport_set_drvdata(gameport, guillemot);
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err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
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if (err)
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goto fail1;
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i = guillemot_read_packet(gameport, data);
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if (i != GUILLEMOT_MAX_LENGTH * 8 || data[0] != 0x55 || data[16] != 0xaa) {
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err = -ENODEV;
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goto fail2;
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}
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for (i = 0; guillemot_type[i].name; i++)
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if (guillemot_type[i].id == data[11])
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break;
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if (!guillemot_type[i].name) {
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printk(KERN_WARNING "guillemot.c: Unknown joystick on %s. [ %02x%02x:%04x, ver %d.%02d ]\n",
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gameport->phys, data[12], data[13], data[11], data[14], data[15]);
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err = -ENODEV;
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goto fail2;
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}
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gameport_set_poll_handler(gameport, guillemot_poll);
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gameport_set_poll_interval(gameport, 20);
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snprintf(guillemot->phys, sizeof(guillemot->phys), "%s/input0", gameport->phys);
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guillemot->type = guillemot_type + i;
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input_dev->name = guillemot_type[i].name;
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input_dev->phys = guillemot->phys;
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input_dev->id.bustype = BUS_GAMEPORT;
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input_dev->id.vendor = GAMEPORT_ID_VENDOR_GUILLEMOT;
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input_dev->id.product = guillemot_type[i].id;
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input_dev->id.version = (int)data[14] << 8 | data[15];
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input_dev->dev.parent = &gameport->dev;
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input_set_drvdata(input_dev, guillemot);
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input_dev->open = guillemot_open;
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input_dev->close = guillemot_close;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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for (i = 0; (t = guillemot->type->abs[i]) >= 0; i++)
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input_set_abs_params(input_dev, t, 0, 255, 0, 0);
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if (guillemot->type->hat) {
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input_set_abs_params(input_dev, ABS_HAT0X, -1, 1, 0, 0);
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input_set_abs_params(input_dev, ABS_HAT0Y, -1, 1, 0, 0);
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}
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for (i = 0; (t = guillemot->type->btn[i]) >= 0; i++)
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set_bit(t, input_dev->keybit);
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err = input_register_device(guillemot->dev);
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if (err)
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goto fail2;
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return 0;
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fail2: gameport_close(gameport);
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fail1: gameport_set_drvdata(gameport, NULL);
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input_free_device(input_dev);
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kfree(guillemot);
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return err;
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}
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static void guillemot_disconnect(struct gameport *gameport)
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{
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struct guillemot *guillemot = gameport_get_drvdata(gameport);
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printk(KERN_INFO "guillemot.c: Failed %d reads out of %d on %s\n", guillemot->reads, guillemot->bads, guillemot->phys);
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input_unregister_device(guillemot->dev);
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gameport_close(gameport);
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kfree(guillemot);
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}
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static struct gameport_driver guillemot_drv = {
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.driver = {
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.name = "guillemot",
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},
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.description = DRIVER_DESC,
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.connect = guillemot_connect,
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.disconnect = guillemot_disconnect,
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};
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module_gameport_driver(guillemot_drv);
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