cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/keyboard/sunkbd.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 */

/*
 * Sun keyboard 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/delay.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/workqueue.h>


#define DRIVER_DESC	"Sun keyboard driver"

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

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


static unsigned char sunkbd_keycode[128] = {
	  0,128,114,129,115, 59, 60, 68, 61, 87, 62, 88, 63,100, 64,112,
	 65, 66, 67, 56,103,119, 99, 70,105,130,131,108,106,  1,  2,  3,
	  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 41, 14,110,113, 98, 55,
	116,132, 83,133,102, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
	 26, 27,111,127, 71, 72, 73, 74,134,135,107,  0, 29, 30, 31, 32,
	 33, 34, 35, 36, 37, 38, 39, 40, 43, 28, 96, 75, 76, 77, 82,136,
	104,137, 69, 42, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54,101,
	 79, 80, 81,  0,  0,  0,138, 58,125, 57,126,109, 86, 78
};


#define SUNKBD_CMD_RESET	0x1

#define SUNKBD_CMD_BELLON	0x2

#define SUNKBD_CMD_BELLOFF	0x3

#define SUNKBD_CMD_CLICK	0xa

#define SUNKBD_CMD_NOCLICK	0xb

#define SUNKBD_CMD_SETLED	0xe

#define SUNKBD_CMD_LAYOUT	0xf


#define SUNKBD_RET_RESET	0xff

#define SUNKBD_RET_ALLUP	0x7f

#define SUNKBD_RET_LAYOUT	0xfe


#define SUNKBD_LAYOUT_5_MASK	0x20

#define SUNKBD_RELEASE		0x80

#define SUNKBD_KEY		0x7f

/*
 * Per-keyboard data.
 */


struct sunkbd {
	
unsigned char keycode[ARRAY_SIZE(sunkbd_keycode)];
	
struct input_dev *dev;
	
struct serio *serio;
	
struct work_struct tq;
	
wait_queue_head_t wait;
	
char name[64];
	
char phys[32];
	
char type;
	
bool enabled;
	
volatile s8 reset;
	
volatile s8 layout;
};

/*
 * sunkbd_interrupt() is called by the low level driver when a character
 * is received.
 */


static irqreturn_t sunkbd_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct sunkbd *sunkbd = serio_get_drvdata(serio); if (sunkbd->reset <= -1) { /* * If cp[i] is 0xff, sunkbd->reset will stay -1. * The keyboard sends 0xff 0xff 0xID on powerup. */ sunkbd->reset = data; wake_up_interruptible(&sunkbd->wait); goto out; } if (sunkbd->layout == -1) { sunkbd->layout = data; wake_up_interruptible(&sunkbd->wait); goto out; } switch (data) { case SUNKBD_RET_RESET: schedule_work(&sunkbd->tq); sunkbd->reset = -1; break; case SUNKBD_RET_LAYOUT: sunkbd->layout = -1; break; case SUNKBD_RET_ALLUP: /* All keys released */ break; default: if (!sunkbd->enabled) break; if (sunkbd->keycode[data & SUNKBD_KEY]) { input_report_key(sunkbd->dev, sunkbd->keycode[data & SUNKBD_KEY], !(data & SUNKBD_RELEASE)); input_sync(sunkbd->dev); } else { printk(KERN_WARNING "sunkbd.c: Unknown key (scancode %#x) %s.\n", data & SUNKBD_KEY, data & SUNKBD_RELEASE ? "released" : "pressed"); } } out: return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik17786.34%337.50%
Andrew Morton157.32%112.50%
Dmitry Torokhov125.85%337.50%
Ingo Molnar10.49%112.50%
Total205100.00%8100.00%

/* * sunkbd_event() handles events from the input module. */
static int sunkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { struct sunkbd *sunkbd = input_get_drvdata(dev); switch (type) { case EV_LED: serio_write(sunkbd->serio, SUNKBD_CMD_SETLED); serio_write(sunkbd->serio, (!!test_bit(LED_CAPSL, dev->led) << 3) | (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_COMPOSE, dev->led) << 1) | !!test_bit(LED_NUML, dev->led)); return 0; case EV_SND: switch (code) { case SND_CLICK: serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - value); return 0; case SND_BELL: serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - value); return 0; } break; } return -1; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik15795.73%133.33%
Dmitry Torokhov74.27%266.67%
Total164100.00%3100.00%

/* * sunkbd_initialize() checks for a Sun keyboard attached, and determines * its type. */
static int sunkbd_initialize(struct sunkbd *sunkbd) { sunkbd->reset = -2; serio_write(sunkbd->serio, SUNKBD_CMD_RESET); wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ); if (sunkbd->reset < 0) return -1; sunkbd->type = sunkbd->reset; if (sunkbd->type == 4) { /* Type 4 keyboard */ sunkbd->layout = -2; serio_write(sunkbd->serio, SUNKBD_CMD_LAYOUT); wait_event_interruptible_timeout(sunkbd->wait, sunkbd->layout >= 0, HZ / 4); if (sunkbd->layout < 0) return -1; if (sunkbd->layout & SUNKBD_LAYOUT_5_MASK) sunkbd->type = 5; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik13398.52%266.67%
Dmitry Torokhov21.48%133.33%
Total135100.00%3100.00%

/* * sunkbd_reinit() sets leds and beeps to a state the computer remembers they * were in. */
static void sunkbd_reinit(struct work_struct *work) { struct sunkbd *sunkbd = container_of(work, struct sunkbd, tq); wait_event_interruptible_timeout(sunkbd->wait, sunkbd->reset >= 0, HZ); serio_write(sunkbd->serio, SUNKBD_CMD_SETLED); serio_write(sunkbd->serio, (!!test_bit(LED_CAPSL, sunkbd->dev->led) << 3) | (!!test_bit(LED_SCROLLL, sunkbd->dev->led) << 2) | (!!test_bit(LED_COMPOSE, sunkbd->dev->led) << 1) | !!test_bit(LED_NUML, sunkbd->dev->led)); serio_write(sunkbd->serio, SUNKBD_CMD_NOCLICK - !!test_bit(SND_CLICK, sunkbd->dev->snd)); serio_write(sunkbd->serio, SUNKBD_CMD_BELLOFF - !!test_bit(SND_BELL, sunkbd->dev->snd)); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik14386.67%240.00%
David Howells127.27%120.00%
Dmitry Torokhov106.06%240.00%
Total165100.00%5100.00%


static void sunkbd_enable(struct sunkbd *sunkbd, bool enable) { serio_pause_rx(sunkbd->serio); sunkbd->enabled = enable; serio_continue_rx(sunkbd->serio); }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov3397.06%266.67%
Fabrice Knevez12.94%133.33%
Total34100.00%3100.00%

/* * sunkbd_connect() probes for a Sun keyboard and fills the necessary * structures. */
static int sunkbd_connect(struct serio *serio, struct serio_driver *drv) { struct sunkbd *sunkbd; struct input_dev *input_dev; int err = -ENOMEM; int i; sunkbd = kzalloc(sizeof(struct sunkbd), GFP_KERNEL); input_dev = input_allocate_device(); if (!sunkbd || !input_dev) goto fail1; sunkbd->serio = serio; sunkbd->dev = input_dev; init_waitqueue_head(&sunkbd->wait); INIT_WORK(&sunkbd->tq, sunkbd_reinit); snprintf(sunkbd->phys, sizeof(sunkbd->phys), "%s/input0", serio->phys); serio_set_drvdata(serio, sunkbd); err = serio_open(serio, drv); if (err) goto fail2; if (sunkbd_initialize(sunkbd) < 0) { err = -ENODEV; goto fail3; } snprintf(sunkbd->name, sizeof(sunkbd->name), "Sun Type %d keyboard", sunkbd->type); memcpy(sunkbd->keycode, sunkbd_keycode, sizeof(sunkbd->keycode)); input_dev->name = sunkbd->name; input_dev->phys = sunkbd->phys; input_dev->id.bustype = BUS_RS232; input_dev->id.vendor = SERIO_SUNKBD; input_dev->id.product = sunkbd->type; input_dev->id.version = 0x0100; input_dev->dev.parent = &serio->dev; input_set_drvdata(input_dev, sunkbd); input_dev->event = sunkbd_event; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) | BIT_MASK(EV_SND) | BIT_MASK(EV_REP); input_dev->ledbit[0] = BIT_MASK(LED_CAPSL) | BIT_MASK(LED_COMPOSE) | BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_NUML); input_dev->sndbit[0] = BIT_MASK(SND_CLICK) | BIT_MASK(SND_BELL); input_dev->keycode = sunkbd->keycode; input_dev->keycodesize = sizeof(unsigned char); input_dev->keycodemax = ARRAY_SIZE(sunkbd_keycode); for (i = 0; i < ARRAY_SIZE(sunkbd_keycode); i++) __set_bit(sunkbd->keycode[i], input_dev->keybit); __clear_bit(KEY_RESERVED, input_dev->keybit); sunkbd_enable(sunkbd, true); err = input_register_device(sunkbd->dev); if (err) goto fail4; return 0; fail4: sunkbd_enable(sunkbd, false); fail3: serio_close(serio); fail2: serio_set_drvdata(serio, NULL); fail1: input_free_device(input_dev); kfree(sunkbd); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Torokhov29663.11%1058.82%
Vojtech Pavlik15833.69%529.41%
Jiri Slaby102.13%15.88%
Ingo Molnar51.07%15.88%
Total469100.00%17100.00%

/* * sunkbd_disconnect() unregisters and closes behind us. */
static void sunkbd_disconnect(struct serio *serio) { struct sunkbd *sunkbd = serio_get_drvdata(serio); sunkbd_enable(sunkbd, false); input_unregister_device(sunkbd->dev); serio_close(serio); serio_set_drvdata(serio, NULL); kfree(sunkbd); }

Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik3567.31%125.00%
Dmitry Torokhov1732.69%375.00%
Total52100.00%4100.00%

static struct serio_device_id sunkbd_serio_ids[] = { { .type = SERIO_RS232, .proto = SERIO_SUNKBD, .id = SERIO_ANY, .extra = SERIO_ANY, }, { .type = SERIO_RS232, .proto = SERIO_UNKNOWN, /* sunkbd does probe */ .id = SERIO_ANY, .extra = SERIO_ANY, }, { 0 } }; MODULE_DEVICE_TABLE(serio, sunkbd_serio_ids); static struct serio_driver sunkbd_drv = { .driver = { .name = "sunkbd", }, .description = DRIVER_DESC, .id_table = sunkbd_serio_ids, .interrupt = sunkbd_interrupt, .connect = sunkbd_connect, .disconnect = sunkbd_disconnect, }; module_serio_driver(sunkbd_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Vojtech Pavlik122569.60%825.00%
Dmitry Torokhov47927.22%1443.75%
Andrew Morton150.85%13.12%
David Howells120.68%13.12%
Jiri Slaby100.57%13.12%
Ingo Molnar80.45%13.12%
Alexey Dobriyan30.17%13.12%
Axel Lin20.11%13.12%
Ricky Beam20.11%13.12%
Al Viro20.11%13.12%
Adrian Bunk10.06%13.12%
Fabrice Knevez10.06%13.12%
Total1760100.00%32100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.