diff options
Diffstat (limited to 'drivers/input/joystick/grip.c')
| -rw-r--r-- | drivers/input/joystick/grip.c | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/drivers/input/joystick/grip.c b/drivers/input/joystick/grip.c new file mode 100644 index 000000000..fe798bc87 --- /dev/null +++ b/drivers/input/joystick/grip.c @@ -0,0 +1,410 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 1998-2001 Vojtech Pavlik + */ + +/* + * Gravis/Kensington GrIP protocol joystick and gamepad driver for Linux + */ + +/* + */ + +#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); |