mirror of https://gitee.com/openkylin/linux.git
411 lines
10 KiB
C
411 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1998-2001 Vojtech Pavlik
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*/
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/*
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* Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux
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*/
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/*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.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 "Gravis GrIP protocol 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 GRIP_MODE_GPP 1
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#define GRIP_MODE_BD 2
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#define GRIP_MODE_XT 3
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#define GRIP_MODE_DC 4
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#define GRIP_LENGTH_GPP 24
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#define GRIP_STROBE_GPP 200 /* 200 us */
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#define GRIP_LENGTH_XT 4
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#define GRIP_STROBE_XT 64 /* 64 us */
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#define GRIP_MAX_CHUNKS_XT 10
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#define GRIP_MAX_BITS_XT 30
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struct grip {
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struct gameport *gameport;
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struct input_dev *dev[2];
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unsigned char mode[2];
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int reads;
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int bads;
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char phys[2][32];
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};
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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 };
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static int grip_btn_bd[] = { BTN_THUMB, BTN_THUMB2, BTN_TRIGGER, BTN_TOP, BTN_BASE, -1 };
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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 };
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static int grip_btn_dc[] = { BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE, BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, -1 };
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static int grip_abs_gpp[] = { ABS_X, ABS_Y, -1 };
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static int grip_abs_bd[] = { ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
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static int grip_abs_xt[] = { ABS_X, ABS_Y, ABS_BRAKE, ABS_GAS, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, ABS_HAT1X, ABS_HAT1Y, -1 };
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static int grip_abs_dc[] = { ABS_X, ABS_Y, ABS_RX, ABS_RY, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
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static char *grip_name[] = { NULL, "Gravis GamePad Pro", "Gravis Blackhawk Digital",
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"Gravis Xterminator Digital", "Gravis Xterminator DualControl" };
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static int *grip_abs[] = { NULL, grip_abs_gpp, grip_abs_bd, grip_abs_xt, grip_abs_dc };
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static int *grip_btn[] = { NULL, grip_btn_gpp, grip_btn_bd, grip_btn_xt, grip_btn_dc };
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static char grip_anx[] = { 0, 0, 3, 5, 5 };
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static char grip_cen[] = { 0, 0, 2, 2, 4 };
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/*
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* grip_gpp_read_packet() reads a Gravis GamePad Pro packet.
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*/
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static int grip_gpp_read_packet(struct gameport *gameport, int shift, unsigned int *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;
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int i;
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int strobe = gameport_time(gameport, GRIP_STROBE_GPP);
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data[0] = 0;
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t = strobe;
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i = 0;
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local_irq_save(flags);
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v = gameport_read(gameport) >> shift;
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do {
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t--;
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u = v; v = (gameport_read(gameport) >> shift) & 3;
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if (~v & u & 1) {
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data[0] |= (v >> 1) << i++;
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t = strobe;
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}
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} while (i < GRIP_LENGTH_GPP && t > 0);
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local_irq_restore(flags);
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if (i < GRIP_LENGTH_GPP) return -1;
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for (i = 0; i < GRIP_LENGTH_GPP && (data[0] & 0xfe4210) ^ 0x7c0000; i++)
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data[0] = data[0] >> 1 | (data[0] & 1) << (GRIP_LENGTH_GPP - 1);
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return -(i == GRIP_LENGTH_GPP);
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}
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/*
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* grip_xt_read_packet() reads a Gravis Xterminator packet.
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*/
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static int grip_xt_read_packet(struct gameport *gameport, int shift, unsigned int *data)
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{
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unsigned int i, j, buf, crc;
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unsigned char u, v, w;
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unsigned long flags;
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unsigned int t;
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char status;
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int strobe = gameport_time(gameport, GRIP_STROBE_XT);
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data[0] = data[1] = data[2] = data[3] = 0;
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status = buf = i = j = 0;
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t = strobe;
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local_irq_save(flags);
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v = w = (gameport_read(gameport) >> shift) & 3;
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do {
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t--;
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u = (gameport_read(gameport) >> shift) & 3;
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if (u ^ v) {
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if ((u ^ v) & 1) {
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buf = (buf << 1) | (u >> 1);
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t = strobe;
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i++;
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} else
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if ((((u ^ v) & (v ^ w)) >> 1) & ~(u | v | w) & 1) {
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if (i == 20) {
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crc = buf ^ (buf >> 7) ^ (buf >> 14);
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if (!((crc ^ (0x25cb9e70 >> ((crc >> 2) & 0x1c))) & 0xf)) {
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data[buf >> 18] = buf >> 4;
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status |= 1 << (buf >> 18);
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}
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j++;
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}
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t = strobe;
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buf = 0;
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i = 0;
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}
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w = v;
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v = u;
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}
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} while (status != 0xf && i < GRIP_MAX_BITS_XT && j < GRIP_MAX_CHUNKS_XT && t > 0);
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local_irq_restore(flags);
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return -(status != 0xf);
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}
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/*
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* grip_timer() repeatedly polls the joysticks and generates events.
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*/
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static void grip_poll(struct gameport *gameport)
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{
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struct grip *grip = gameport_get_drvdata(gameport);
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unsigned int data[GRIP_LENGTH_XT];
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struct input_dev *dev;
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int i, j;
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for (i = 0; i < 2; i++) {
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dev = grip->dev[i];
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if (!dev)
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continue;
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grip->reads++;
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switch (grip->mode[i]) {
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case GRIP_MODE_GPP:
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if (grip_gpp_read_packet(grip->gameport, (i << 1) + 4, data)) {
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grip->bads++;
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break;
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}
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input_report_abs(dev, ABS_X, ((*data >> 15) & 1) - ((*data >> 16) & 1));
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input_report_abs(dev, ABS_Y, ((*data >> 13) & 1) - ((*data >> 12) & 1));
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for (j = 0; j < 12; j++)
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if (grip_btn_gpp[j])
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input_report_key(dev, grip_btn_gpp[j], (*data >> j) & 1);
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break;
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case GRIP_MODE_BD:
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if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
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grip->bads++;
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break;
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}
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input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
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input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
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input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
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input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
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input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
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for (j = 0; j < 5; j++)
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input_report_key(dev, grip_btn_bd[j], (data[3] >> (j + 4)) & 1);
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break;
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case GRIP_MODE_XT:
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if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
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grip->bads++;
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break;
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}
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input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
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input_report_abs(dev, ABS_Y, 63 - ((data[0] >> 8) & 0x3f));
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input_report_abs(dev, ABS_BRAKE, (data[1] >> 2) & 0x3f);
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input_report_abs(dev, ABS_GAS, (data[1] >> 8) & 0x3f);
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input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
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input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
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input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
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input_report_abs(dev, ABS_HAT1X, ((data[2] >> 5) & 1) - ((data[2] >> 4) & 1));
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input_report_abs(dev, ABS_HAT1Y, ((data[2] >> 6) & 1) - ((data[2] >> 7) & 1));
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for (j = 0; j < 11; j++)
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input_report_key(dev, grip_btn_xt[j], (data[3] >> (j + 3)) & 1);
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break;
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case GRIP_MODE_DC:
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if (grip_xt_read_packet(grip->gameport, (i << 1) + 4, data)) {
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grip->bads++;
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break;
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}
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input_report_abs(dev, ABS_X, (data[0] >> 2) & 0x3f);
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input_report_abs(dev, ABS_Y, (data[0] >> 8) & 0x3f);
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input_report_abs(dev, ABS_RX, (data[1] >> 2) & 0x3f);
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input_report_abs(dev, ABS_RY, (data[1] >> 8) & 0x3f);
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input_report_abs(dev, ABS_THROTTLE, (data[2] >> 8) & 0x3f);
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input_report_abs(dev, ABS_HAT0X, ((data[2] >> 1) & 1) - ( data[2] & 1));
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input_report_abs(dev, ABS_HAT0Y, ((data[2] >> 2) & 1) - ((data[2] >> 3) & 1));
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for (j = 0; j < 9; j++)
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input_report_key(dev, grip_btn_dc[j], (data[3] >> (j + 3)) & 1);
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break;
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}
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input_sync(dev);
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}
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}
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static int grip_open(struct input_dev *dev)
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{
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struct grip *grip = input_get_drvdata(dev);
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gameport_start_polling(grip->gameport);
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return 0;
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}
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static void grip_close(struct input_dev *dev)
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{
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struct grip *grip = input_get_drvdata(dev);
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gameport_stop_polling(grip->gameport);
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}
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static int grip_connect(struct gameport *gameport, struct gameport_driver *drv)
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{
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struct grip *grip;
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struct input_dev *input_dev;
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unsigned int data[GRIP_LENGTH_XT];
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int i, j, t;
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int err;
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if (!(grip = kzalloc(sizeof(struct grip), GFP_KERNEL)))
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return -ENOMEM;
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grip->gameport = gameport;
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gameport_set_drvdata(gameport, grip);
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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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for (i = 0; i < 2; i++) {
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if (!grip_gpp_read_packet(gameport, (i << 1) + 4, data)) {
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grip->mode[i] = GRIP_MODE_GPP;
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continue;
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}
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if (!grip_xt_read_packet(gameport, (i << 1) + 4, data)) {
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if (!(data[3] & 7)) {
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grip->mode[i] = GRIP_MODE_BD;
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continue;
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}
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if (!(data[2] & 0xf0)) {
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grip->mode[i] = GRIP_MODE_XT;
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continue;
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}
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grip->mode[i] = GRIP_MODE_DC;
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continue;
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}
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}
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if (!grip->mode[0] && !grip->mode[1]) {
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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, grip_poll);
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gameport_set_poll_interval(gameport, 20);
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for (i = 0; i < 2; i++) {
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if (!grip->mode[i])
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continue;
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grip->dev[i] = input_dev = input_allocate_device();
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if (!input_dev) {
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err = -ENOMEM;
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goto fail3;
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}
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snprintf(grip->phys[i], sizeof(grip->phys[i]),
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"%s/input%d", gameport->phys, i);
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input_dev->name = grip_name[grip->mode[i]];
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input_dev->phys = grip->phys[i];
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input_dev->id.bustype = BUS_GAMEPORT;
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input_dev->id.vendor = GAMEPORT_ID_VENDOR_GRAVIS;
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input_dev->id.product = grip->mode[i];
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input_dev->id.version = 0x0100;
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input_dev->dev.parent = &gameport->dev;
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input_set_drvdata(input_dev, grip);
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input_dev->open = grip_open;
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input_dev->close = grip_close;
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
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for (j = 0; (t = grip_abs[grip->mode[i]][j]) >= 0; j++) {
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if (j < grip_cen[grip->mode[i]])
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input_set_abs_params(input_dev, t, 14, 52, 1, 2);
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else if (j < grip_anx[grip->mode[i]])
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input_set_abs_params(input_dev, t, 3, 57, 1, 0);
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else
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input_set_abs_params(input_dev, t, -1, 1, 0, 0);
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}
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for (j = 0; (t = grip_btn[grip->mode[i]][j]) >= 0; j++)
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if (t > 0)
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set_bit(t, input_dev->keybit);
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err = input_register_device(grip->dev[i]);
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if (err)
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goto fail4;
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}
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return 0;
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fail4: input_free_device(grip->dev[i]);
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fail3: while (--i >= 0)
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if (grip->dev[i])
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input_unregister_device(grip->dev[i]);
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fail2: gameport_close(gameport);
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fail1: gameport_set_drvdata(gameport, NULL);
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kfree(grip);
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return err;
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}
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static void grip_disconnect(struct gameport *gameport)
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{
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struct grip *grip = gameport_get_drvdata(gameport);
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int i;
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for (i = 0; i < 2; i++)
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if (grip->dev[i])
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input_unregister_device(grip->dev[i]);
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gameport_close(gameport);
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gameport_set_drvdata(gameport, NULL);
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kfree(grip);
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}
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static struct gameport_driver grip_drv = {
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.driver = {
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.name = "grip",
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.owner = THIS_MODULE,
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},
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.description = DRIVER_DESC,
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.connect = grip_connect,
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.disconnect = grip_disconnect,
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};
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module_gameport_driver(grip_drv);
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