cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/joystick/spaceorb.c

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

/*
 * SpaceTec SpaceOrb 360 and Avenger 6dof controller 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 SpaceOrb 360 and Avenger 6dof controller driver"

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

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

/*
 * Constants.
 */


#define SPACEORB_MAX_LENGTH	64


static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };

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

/*
 * Per-Orb data.
 */


struct spaceorb {
	
struct input_dev *dev;
	
int idx;
	
unsigned char data[SPACEORB_MAX_LENGTH];
	
char phys[32];
};


static unsigned char spaceorb_xor[] = "SpaceWare";


static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
		"Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };

/*
 * spaceorb_process_packet() decodes packets the driver receives from the
 * SpaceOrb.
 */


static void spaceorb_process_packet(struct spaceorb *spaceorb) { struct input_dev *dev = spaceorb->dev; unsigned char *data = spaceorb->data; unsigned char c = 0; int axes[6]; int i; if (spaceorb->idx < 2) return; for (i = 0; i < spaceorb->idx; i++) c ^= data[i]; if (c) return; switch (data[0]) { case 'R': /* Reset packet */ spaceorb->data[spaceorb->idx - 1] = 0; for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++); printk(KERN_INFO "input: %s [%s] is %s\n", dev->name, spaceorb->data + i, spaceorb->phys); break; case 'D': /* Ball + button data */ if (spaceorb->idx != 12) return; for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i]; axes[0] = ( data[2] << 3) | (data[ 3] >> 4); axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1); axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5); axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2); axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6); axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3); for (i = 0; i < 6; i++) input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0)); for (i = 0; i < 6; i++) input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1); break; case 'K': /* Button data */ if (spaceorb->idx != 5) return; for (i = 0; i < 6; i++) input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1); break; case 'E': /* Error packet */ if (spaceorb->idx != 4) return; printk(KERN_ERR "spaceorb: Device error. [ "); for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]); printk("]\n"); break; } input_sync(dev); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)54797.68%233.33%
Vojtech Pavlik71.25%233.33%
Dmitry Torokhov50.89%116.67%
Adrian Bunk10.18%116.67%
Total560100.00%6100.00%


static irqreturn_t spaceorb_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct spaceorb* spaceorb = serio_get_drvdata(serio); if (~data & 0x80) { if (spaceorb->idx) spaceorb_process_packet(spaceorb); spaceorb->idx = 0; } if (spaceorb->idx < SPACEORB_MAX_LENGTH) spaceorb->data[spaceorb->idx++] = data & 0x7f; return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7391.25%250.00%
Andrew Morton45.00%125.00%
Dmitry Torokhov33.75%125.00%
Total80100.00%4100.00%

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

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)2862.22%250.00%
Dmitry Torokhov1737.78%250.00%
Total45100.00%4100.00%

/* * spaceorb_connect() is the routine that is called when someone adds a * new serio device that supports SpaceOrb/Avenger protocol and registers * it as an input device. */
static int spaceorb_connect(struct serio *serio, struct serio_driver *drv) { struct spaceorb *spaceorb; struct input_dev *input_dev; int err = -ENOMEM; int i; spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL); input_dev = input_allocate_device(); if (!spaceorb || !input_dev) goto fail1; spaceorb->dev = input_dev; snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys); input_dev->name = "SpaceTec SpaceOrb 360 / Avenger"; input_dev->phys = spaceorb->phys; input_dev->id.bustype = BUS_RS232; input_dev->id.vendor = SERIO_SPACEORB; input_dev->id.product = 0x0001; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); for (i = 0; i < 6; i++) set_bit(spaceorb_buttons[i], input_dev->keybit); for (i = 0; i < 6; i++) input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0); serio_set_drvdata(serio, spaceorb); err = serio_open(serio, drv); if (err) goto fail2; err = input_register_device(spaceorb->dev); if (err) goto fail3; return 0; fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(spaceorb); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov17459.18%758.33%
Linus Torvalds (pre-git)11338.44%216.67%
Vojtech Pavlik51.70%216.67%
Jiri Slaby20.68%18.33%
Total294100.00%12100.00%

/* * The serio driver structure. */ static struct serio_device_id spaceorb_serio_ids[] = { { .type = SERIO_RS232, .proto = SERIO_SPACEORB, .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids); static struct serio_driver spaceorb_drv = { .driver = { .name = "spaceorb", }, .description = DRIVER_DESC, .id_table = spaceorb_serio_ids, .interrupt = spaceorb_interrupt, .connect = spaceorb_connect, .disconnect = spaceorb_disconnect, }; module_serio_driver(spaceorb_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)88973.53%29.09%
Dmitry Torokhov27122.42%1045.45%
Vojtech Pavlik383.14%418.18%
Andrew Morton40.33%14.55%
Adrian Bunk20.17%29.09%
Jiri Slaby20.17%14.55%
Axel Lin20.17%14.55%
Linus Torvalds10.08%14.55%
Total1209100.00%22100.00%
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