cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/joystick/spaceball.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *
 *  Based on the work of:
 *      David Thompson
 *      Joseph Krahn
 */

/*
 * SpaceTec SpaceBall 2003/3003/4000 FLX 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/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>


#define DRIVER_DESC	"SpaceTec SpaceBall 2003/3003/4000 FLX driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

/*
 * Constants.
 */


#define SPACEBALL_MAX_LENGTH	128

#define SPACEBALL_MAX_ID	9


#define SPACEBALL_1003      1

#define SPACEBALL_2003B     3

#define SPACEBALL_2003C     4

#define SPACEBALL_3003C     7

#define SPACEBALL_4000FLX   8

#define SPACEBALL_4000FLX_L 9


static int spaceball_axes[] = { ABS_X, ABS_Z, ABS_Y, ABS_RX, ABS_RZ, ABS_RY };

static char *spaceball_names[] = {
	"?", "SpaceTec SpaceBall 1003", "SpaceTec SpaceBall 2003", "SpaceTec SpaceBall 2003B",
	"SpaceTec SpaceBall 2003C", "SpaceTec SpaceBall 3003", "SpaceTec SpaceBall SpaceController",
	"SpaceTec SpaceBall 3003C", "SpaceTec SpaceBall 4000FLX", "SpaceTec SpaceBall 4000FLX Lefty" };

/*
 * Per-Ball data.
 */


struct spaceball {
	
struct input_dev *dev;
	
int idx;
	
int escape;
	
unsigned char data[SPACEBALL_MAX_LENGTH];
	
char phys[32];
};

/*
 * spaceball_process_packet() decodes packets the driver receives from the
 * SpaceBall.
 */


static void spaceball_process_packet(struct spaceball* spaceball) { struct input_dev *dev = spaceball->dev; unsigned char *data = spaceball->data; int i; if (spaceball->idx < 2) return; switch (spaceball->data[0]) { case 'D': /* Ball data */ if (spaceball->idx != 15) return; for (i = 0; i < 6; i++) input_report_abs(dev, spaceball_axes[i], (__s16)((data[2 * i + 3] << 8) | data[2 * i + 2])); break; case 'K': /* Button data */ if (spaceball->idx != 3) return; input_report_key(dev, BTN_1, (data[2] & 0x01) || (data[2] & 0x20)); input_report_key(dev, BTN_2, data[2] & 0x02); input_report_key(dev, BTN_3, data[2] & 0x04); input_report_key(dev, BTN_4, data[2] & 0x08); input_report_key(dev, BTN_5, data[1] & 0x01); input_report_key(dev, BTN_6, data[1] & 0x02); input_report_key(dev, BTN_7, data[1] & 0x04); input_report_key(dev, BTN_8, data[1] & 0x10); break; case '.': /* Advanced button data */ if (spaceball->idx != 3) return; input_report_key(dev, BTN_1, data[2] & 0x01); input_report_key(dev, BTN_2, data[2] & 0x02); input_report_key(dev, BTN_3, data[2] & 0x04); input_report_key(dev, BTN_4, data[2] & 0x08); input_report_key(dev, BTN_5, data[2] & 0x10); input_report_key(dev, BTN_6, data[2] & 0x20); input_report_key(dev, BTN_7, data[2] & 0x80); input_report_key(dev, BTN_8, data[1] & 0x01); input_report_key(dev, BTN_9, data[1] & 0x02); input_report_key(dev, BTN_A, data[1] & 0x04); input_report_key(dev, BTN_B, data[1] & 0x08); input_report_key(dev, BTN_C, data[1] & 0x10); input_report_key(dev, BTN_MODE, data[1] & 0x20); break; case 'E': /* Device error */ spaceball->data[spaceball->idx - 1] = 0; printk(KERN_ERR "spaceball: Device error. [%s]\n", spaceball->data + 1); break; case '?': /* Bad command packet */ spaceball->data[spaceball->idx - 1] = 0; printk(KERN_ERR "spaceball: Bad command. [%s]\n", spaceball->data + 1); break; } input_sync(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik35969.84%233.33%
Linus Torvalds (pre-git)15530.16%466.67%
Total514100.00%6100.00%

/* * Spaceball 4000 FLX packets all start with a one letter packet-type decriptor, * and end in 0x0d. It uses '^' as an escape for CR, XOFF and XON characters which * can occur in the axis values. */
static irqreturn_t spaceball_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct spaceball *spaceball = serio_get_drvdata(serio); switch (data) { case 0xd: spaceball_process_packet(spaceball); spaceball->idx = 0; spaceball->escape = 0; break; case '^': if (!spaceball->escape) { spaceball->escape = 1; break; } spaceball->escape = 0; case 'M': case 'Q': case 'S': if (spaceball->escape) { spaceball->escape = 0; data &= 0x1f; } default: if (spaceball->escape) spaceball->escape = 0; if (spaceball->idx < SPACEBALL_MAX_LENGTH) spaceball->data[spaceball->idx++] = data; break; } return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13190.34%342.86%
Andrew Morton74.83%114.29%
Linus Torvalds32.07%114.29%
Dmitry Torokhov32.07%114.29%
Vojtech Pavlik10.69%114.29%
Total145100.00%7100.00%

/* * spaceball_disconnect() is the opposite of spaceball_connect() */
static void spaceball_disconnect(struct serio *serio) { struct spaceball* spaceball = serio_get_drvdata(serio); serio_close(serio); serio_set_drvdata(serio, NULL); input_unregister_device(spaceball->dev); kfree(spaceball); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2862.22%360.00%
Dmitry Torokhov1737.78%240.00%
Total45100.00%5100.00%

/* * spaceball_connect() is the routine that is called when someone adds a * new serio device that supports Spaceball protocol and registers it as * an input device. */
static int spaceball_connect(struct serio *serio, struct serio_driver *drv) { struct spaceball *spaceball; struct input_dev *input_dev; int err = -ENOMEM; int i, id; if ((id = serio->id.id) > SPACEBALL_MAX_ID) return -ENODEV; spaceball = kmalloc(sizeof(struct spaceball), GFP_KERNEL); input_dev = input_allocate_device(); if (!spaceball || !input_dev) goto fail1; spaceball->dev = input_dev; snprintf(spaceball->phys, sizeof(spaceball->phys), "%s/input0", serio->phys); input_dev->name = spaceball_names[id]; input_dev->phys = spaceball->phys; input_dev->id.bustype = BUS_RS232; input_dev->id.vendor = SERIO_SPACEBALL; input_dev->id.product = id; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); switch (id) { case SPACEBALL_4000FLX: case SPACEBALL_4000FLX_L: input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_9); input_dev->keybit[BIT_WORD(BTN_A)] |= BIT_MASK(BTN_A) | BIT_MASK(BTN_B) | BIT_MASK(BTN_C) | BIT_MASK(BTN_MODE); default: input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_2) | BIT_MASK(BTN_3) | BIT_MASK(BTN_4) | BIT_MASK(BTN_5) | BIT_MASK(BTN_6) | BIT_MASK(BTN_7) | BIT_MASK(BTN_8); case SPACEBALL_3003C: input_dev->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_1) | BIT_MASK(BTN_8); } for (i = 0; i < 3; i++) { input_set_abs_params(input_dev, ABS_X + i, -8000, 8000, 8, 40); input_set_abs_params(input_dev, ABS_RX + i, -1600, 1600, 2, 8); } serio_set_drvdata(serio, spaceball); err = serio_open(serio, drv); if (err) goto fail2; err = input_register_device(spaceball->dev); if (err) goto fail3; return 0; fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(spaceball); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov20246.22%853.33%
Vojtech Pavlik10824.71%213.33%
Linus Torvalds (pre-git)10724.49%426.67%
Jiri Slaby204.58%16.67%
Total437100.00%15100.00%

/* * The serio driver structure. */ static struct serio_device_id spaceball_serio_ids[] = { { .type = SERIO_RS232, .proto = SERIO_SPACEBALL, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, spaceball_serio_ids); static struct serio_driver spaceball_drv = { .driver = { .name = "spaceball", }, .description = DRIVER_DESC, .id_table = spaceball_serio_ids, .interrupt = spaceball_interrupt, .connect = spaceball_connect, .disconnect = spaceball_disconnect, }; module_serio_driver(spaceball_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik54739.61%415.38%
Linus Torvalds (pre-git)50436.50%519.23%
Dmitry Torokhov29421.29%1038.46%
Jiri Slaby201.45%13.85%
Andrew Morton70.51%13.85%
Linus Torvalds50.36%27.69%
Axel Lin20.14%13.85%
Adrian Bunk10.07%13.85%
Nick Martin10.07%13.85%
Total1381100.00%26100.00%
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