1*e8fc9828SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Copyright (c) 2000-2001 Vojtech Pavlik 41da177e4SLinus Torvalds * Copyright (c) 2000 Mark Fletcher 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds /* 81da177e4SLinus Torvalds * Gravis Stinger gamepad driver for Linux 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds /* 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/module.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/input.h> 181da177e4SLinus Torvalds #include <linux/serio.h> 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #define DRIVER_DESC "Gravis Stinger gamepad driver" 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 231da177e4SLinus Torvalds MODULE_DESCRIPTION(DRIVER_DESC); 241da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds /* 271da177e4SLinus Torvalds * Constants. 281da177e4SLinus Torvalds */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #define STINGER_MAX_LENGTH 8 311da177e4SLinus Torvalds 321da177e4SLinus Torvalds /* 331da177e4SLinus Torvalds * Per-Stinger data. 341da177e4SLinus Torvalds */ 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds struct stinger { 3717dd3f0fSDmitry Torokhov struct input_dev *dev; 381da177e4SLinus Torvalds int idx; 391da177e4SLinus Torvalds unsigned char data[STINGER_MAX_LENGTH]; 401da177e4SLinus Torvalds char phys[32]; 411da177e4SLinus Torvalds }; 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds /* 441da177e4SLinus Torvalds * stinger_process_packet() decodes packets the driver receives from the 451da177e4SLinus Torvalds * Stinger. It updates the data accordingly. 461da177e4SLinus Torvalds */ 471da177e4SLinus Torvalds 487d12e780SDavid Howells static void stinger_process_packet(struct stinger *stinger) 491da177e4SLinus Torvalds { 5017dd3f0fSDmitry Torokhov struct input_dev *dev = stinger->dev; 511da177e4SLinus Torvalds unsigned char *data = stinger->data; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds if (!stinger->idx) return; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5)); 561da177e4SLinus Torvalds input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4)); 571da177e4SLinus Torvalds input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3)); 581da177e4SLinus Torvalds input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2)); 591da177e4SLinus Torvalds input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5)); 601da177e4SLinus Torvalds input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4)); 611da177e4SLinus Torvalds input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3)); 621da177e4SLinus Torvalds input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2)); 631da177e4SLinus Torvalds input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1)); 641da177e4SLinus Torvalds input_report_key(dev, BTN_START, (data[3] & 0x01)); 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6)); 671da177e4SLinus Torvalds input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F)); 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds input_sync(dev); 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds return; 721da177e4SLinus Torvalds } 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds /* 751da177e4SLinus Torvalds * stinger_interrupt() is called by the low level driver when characters 761da177e4SLinus Torvalds * are ready for us. We then buffer them for further processing, or call the 771da177e4SLinus Torvalds * packet processing routine. 781da177e4SLinus Torvalds */ 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds static irqreturn_t stinger_interrupt(struct serio *serio, 817d12e780SDavid Howells unsigned char data, unsigned int flags) 821da177e4SLinus Torvalds { 831da177e4SLinus Torvalds struct stinger *stinger = serio_get_drvdata(serio); 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* All Stinger packets are 4 bytes */ 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds if (stinger->idx < STINGER_MAX_LENGTH) 881da177e4SLinus Torvalds stinger->data[stinger->idx++] = data; 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds if (stinger->idx == 4) { 917d12e780SDavid Howells stinger_process_packet(stinger); 921da177e4SLinus Torvalds stinger->idx = 0; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds return IRQ_HANDLED; 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds /* 991da177e4SLinus Torvalds * stinger_disconnect() is the opposite of stinger_connect() 1001da177e4SLinus Torvalds */ 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds static void stinger_disconnect(struct serio *serio) 1031da177e4SLinus Torvalds { 1041da177e4SLinus Torvalds struct stinger *stinger = serio_get_drvdata(serio); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds serio_close(serio); 1071da177e4SLinus Torvalds serio_set_drvdata(serio, NULL); 10817dd3f0fSDmitry Torokhov input_unregister_device(stinger->dev); 1091da177e4SLinus Torvalds kfree(stinger); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds /* 1131da177e4SLinus Torvalds * stinger_connect() is the routine that is called when someone adds a 1141da177e4SLinus Torvalds * new serio device that supports Stinger protocol and registers it as 1151da177e4SLinus Torvalds * an input device. 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static int stinger_connect(struct serio *serio, struct serio_driver *drv) 1191da177e4SLinus Torvalds { 1201da177e4SLinus Torvalds struct stinger *stinger; 12117dd3f0fSDmitry Torokhov struct input_dev *input_dev; 12217dd3f0fSDmitry Torokhov int err = -ENOMEM; 1231da177e4SLinus Torvalds 12417dd3f0fSDmitry Torokhov stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL); 12517dd3f0fSDmitry Torokhov input_dev = input_allocate_device(); 12617dd3f0fSDmitry Torokhov if (!stinger || !input_dev) 127127278ceSDmitry Torokhov goto fail1; 1281da177e4SLinus Torvalds 12917dd3f0fSDmitry Torokhov stinger->dev = input_dev; 13010ca4c0aSDmitry Torokhov snprintf(stinger->phys, sizeof(stinger->phys), "%s/serio0", serio->phys); 1311da177e4SLinus Torvalds 13217dd3f0fSDmitry Torokhov input_dev->name = "Gravis Stinger"; 13317dd3f0fSDmitry Torokhov input_dev->phys = stinger->phys; 13417dd3f0fSDmitry Torokhov input_dev->id.bustype = BUS_RS232; 13517dd3f0fSDmitry Torokhov input_dev->id.vendor = SERIO_STINGER; 13617dd3f0fSDmitry Torokhov input_dev->id.product = 0x0001; 13717dd3f0fSDmitry Torokhov input_dev->id.version = 0x0100; 138935e658eSDmitry Torokhov input_dev->dev.parent = &serio->dev; 1391da177e4SLinus Torvalds 1407b19ada2SJiri Slaby input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); 1417b19ada2SJiri Slaby input_dev->keybit[BIT_WORD(BTN_A)] = BIT_MASK(BTN_A) | BIT_MASK(BTN_B) | 1427b19ada2SJiri Slaby BIT_MASK(BTN_C) | BIT_MASK(BTN_X) | BIT_MASK(BTN_Y) | 1437b19ada2SJiri Slaby BIT_MASK(BTN_Z) | BIT_MASK(BTN_TL) | BIT_MASK(BTN_TR) | 1447b19ada2SJiri Slaby BIT_MASK(BTN_START) | BIT_MASK(BTN_SELECT); 14517dd3f0fSDmitry Torokhov input_set_abs_params(input_dev, ABS_X, -64, 64, 0, 4); 14617dd3f0fSDmitry Torokhov input_set_abs_params(input_dev, ABS_Y, -64, 64, 0, 4); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds serio_set_drvdata(serio, stinger); 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvalds err = serio_open(serio, drv); 15117dd3f0fSDmitry Torokhov if (err) 152127278ceSDmitry Torokhov goto fail2; 15317dd3f0fSDmitry Torokhov 154127278ceSDmitry Torokhov err = input_register_device(stinger->dev); 155127278ceSDmitry Torokhov if (err) 156127278ceSDmitry Torokhov goto fail3; 157127278ceSDmitry Torokhov 15817dd3f0fSDmitry Torokhov return 0; 15917dd3f0fSDmitry Torokhov 160127278ceSDmitry Torokhov fail3: serio_close(serio); 161127278ceSDmitry Torokhov fail2: serio_set_drvdata(serio, NULL); 162127278ceSDmitry Torokhov fail1: input_free_device(input_dev); 1631da177e4SLinus Torvalds kfree(stinger); 1641da177e4SLinus Torvalds return err; 1651da177e4SLinus Torvalds } 1661da177e4SLinus Torvalds 1671da177e4SLinus Torvalds /* 1681da177e4SLinus Torvalds * The serio driver structure. 1691da177e4SLinus Torvalds */ 1701da177e4SLinus Torvalds 171fa0426c6SArvind Yadav static const struct serio_device_id stinger_serio_ids[] = { 1721da177e4SLinus Torvalds { 1731da177e4SLinus Torvalds .type = SERIO_RS232, 1741da177e4SLinus Torvalds .proto = SERIO_STINGER, 1751da177e4SLinus Torvalds .id = SERIO_ANY, 1761da177e4SLinus Torvalds .extra = SERIO_ANY, 1771da177e4SLinus Torvalds }, 1781da177e4SLinus Torvalds { 0 } 1791da177e4SLinus Torvalds }; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds MODULE_DEVICE_TABLE(serio, stinger_serio_ids); 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds static struct serio_driver stinger_drv = { 1841da177e4SLinus Torvalds .driver = { 1851da177e4SLinus Torvalds .name = "stinger", 1861da177e4SLinus Torvalds }, 1871da177e4SLinus Torvalds .description = DRIVER_DESC, 1881da177e4SLinus Torvalds .id_table = stinger_serio_ids, 1891da177e4SLinus Torvalds .interrupt = stinger_interrupt, 1901da177e4SLinus Torvalds .connect = stinger_connect, 1911da177e4SLinus Torvalds .disconnect = stinger_disconnect, 1921da177e4SLinus Torvalds }; 1931da177e4SLinus Torvalds 19465ac9f7aSAxel Lin module_serio_driver(stinger_drv); 195