--- /dev/null
+/*
+ * Copyright (c) 1998-2001 Vojtech Pavlik
+ */
+
+/*
+ * 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@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/gameport.h>
+#include <linux/input.h>
+#include <linux/jiffies.h>
+
+#define DRIVER_DESC "Gravis GrIP protocol joystick driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#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
+
+struct grip {
+ struct gameport *gameport;
+ struct input_dev *dev[2];
+ unsigned char mode[2];
+ int reads;
+ int bads;
+ char phys[2][32];
+};
+
+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[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
+static int *grip_btn[] = { NULL, 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;
+
+ local_irq_save(flags);
+
+ 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);
+
+ local_irq_restore(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;
+
+ local_irq_save(flags);
+
+ 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);
+
+ local_irq_restore(flags);
+
+ return -(status != 0xf);
+}
+
+/*
+ * grip_timer() repeatedly polls the joysticks and generates events.
+ */
+
+static void grip_poll(struct gameport *gameport)
+{
+ struct grip *grip = gameport_get_drvdata(gameport);
+ unsigned int data[GRIP_LENGTH_XT];
+ struct input_dev *dev;
+ int i, j;
+
+ for (i = 0; i < 2; i++) {
+
+ dev = grip->dev[i];
+ if (!dev)
+ continue;
+
+ 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;
+
+
+ }
+
+ input_sync(dev);
+ }
+}
+
+static int grip_open(struct input_dev *dev)
+{
+ struct grip *grip = input_get_drvdata(dev);
+
+ gameport_start_polling(grip->gameport);
+ return 0;
+}
+
+static void grip_close(struct input_dev *dev)
+{
+ struct grip *grip = input_get_drvdata(dev);
+
+ gameport_stop_polling(grip->gameport);
+}
+
+static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
+{
+ struct grip *grip;
+ struct input_dev *input_dev;
+ unsigned int data[GRIP_LENGTH_XT];
+ int i, j, t;
+ int err;
+
+ if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
+ return -ENOMEM;
+
+ grip->gameport = gameport;
+
+ gameport_set_drvdata(gameport, grip);
+
+ err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
+ if (err)
+ 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]) {
+ err = -ENODEV;
+ goto fail2;
+ }
+
+ gameport_set_poll_handler(gameport, grip_poll);
+ gameport_set_poll_interval(gameport, 20);
+
+ for (i = 0; i < 2; i++) {
+ if (!grip->mode[i])
+ continue;
+
+ grip->dev[i] = input_dev = input_allocate_device();
+ if (!input_dev) {
+ err = -ENOMEM;
+ goto fail3;
+ }
+
+ snprintf(grip->phys[i], sizeof(grip->phys[i]),
+ "%s/input%d", gameport->phys, i);
+
+ input_dev->name = grip_name[grip->mode[i]];
+ input_dev->phys = grip->phys[i];
+ input_dev->id.bustype = BUS_GAMEPORT;
+ input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
+ input_dev->id.product = grip->mode[i];
+ input_dev->id.version = 0x0100;
+ input_dev->dev.parent = &gameport->dev;
+
+ input_set_drvdata(input_dev, grip);
+
+ input_dev->open = grip_open;
+ input_dev->close = grip_close;
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+
+ for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
+
+ if (j < grip_cen[grip->mode[i]])
+ input_set_abs_params(input_dev, t, 14, 52, 1, 2);
+ else if (j < grip_anx[grip->mode[i]])
+ input_set_abs_params(input_dev, t, 3, 57, 1, 0);
+ else
+ input_set_abs_params(input_dev, t, -1, 1, 0, 0);
+ }
+
+ for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
+ if (t > 0)
+ set_bit(t, input_dev->keybit);
+
+ err = input_register_device(grip->dev[i]);
+ if (err)
+ goto fail4;
+ }
+
+ return 0;
+
+ fail4: input_free_device(grip->dev[i]);
+ fail3: while (--i >= 0)
+ if (grip->dev[i])
+ input_unregister_device(grip->dev[i]);
+ fail2: gameport_close(gameport);
+ fail1: gameport_set_drvdata(gameport, NULL);
+ kfree(grip);
+ return err;
+}
+
+static void grip_disconnect(struct gameport *gameport)
+{
+ struct grip *grip = gameport_get_drvdata(gameport);
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if (grip->dev[i])
+ input_unregister_device(grip->dev[i]);
+ gameport_close(gameport);
+ gameport_set_drvdata(gameport, NULL);
+ kfree(grip);
+}
+
+static struct gameport_driver grip_drv = {
+ .driver = {
+ .name = "grip",
+ .owner = THIS_MODULE,
+ },
+ .description = DRIVER_DESC,
+ .connect = grip_connect,
+ .disconnect = grip_disconnect,
+};
+
+module_gameport_driver(grip_drv);
Code Review / kvmfornfv.git / blobdiff