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267 lines
6.3 KiB
267 lines
6.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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*/ |
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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 <[email protected]>"); |
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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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