Release 4.7 drivers/hid/usbhid/usbkbd.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *
 *  USB HIDBP Keyboard support
 */

/*
 * 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
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/usb/input.h>
#include <linux/hid.h>

/*
 * Version Information
 */

#define DRIVER_VERSION ""

#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"

#define DRIVER_DESC "USB HID Boot Protocol keyboard driver"

#define DRIVER_LICENSE "GPL"


MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE(DRIVER_LICENSE);


static const unsigned char usb_kbd_keycode[256] = {
	  0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
	 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
	  4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
	 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
	 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
	105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
	 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
	191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
	115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
	122,123, 90, 91, 85,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
	150,158,159,128,136,177,178,176,142,152,173,140
};


/**
 * struct usb_kbd - state of each attached keyboard
 * @dev:        input device associated with this keyboard
 * @usbdev:     usb device associated with this keyboard
 * @old:        data received in the past from the @irq URB representing which
 *              keys were pressed. By comparing with the current list of keys
 *              that are pressed, we are able to see key releases.
 * @irq:        URB for receiving a list of keys that are pressed when a
 *              new key is pressed or a key that was pressed is released.
 * @led:        URB for sending LEDs (e.g. numlock, ...)
 * @newleds:    data that will be sent with the @led URB representing which LEDs
                should be on
 * @name:       Name of the keyboard. @dev's name field points to this buffer
 * @phys:       Physical path of the keyboard. @dev's phys field points to this
 *              buffer
 * @new:        Buffer for the @irq URB
 * @cr:         Control request for @led URB
 * @leds:       Buffer for the @led URB
 * @new_dma:    DMA address for @irq URB
 * @leds_dma:   DMA address for @led URB
 * @leds_lock:  spinlock that protects @leds, @newleds, and @led_urb_submitted
 * @led_urb_submitted: indicates whether @led is in progress, i.e. it has been
 *              submitted and its completion handler has not returned yet
 *              without resubmitting @led
 */

struct usb_kbd {
	
struct input_dev *dev;
	
struct usb_device *usbdev;
	
unsigned char old[8];
	

struct urb *irq, *led;
	
unsigned char newleds;
	
char name[128];
	
char phys[64];

	
unsigned char *new;
	
struct usb_ctrlrequest *cr;
	
unsigned char *leds;
	
dma_addr_t new_dma;
	
dma_addr_t leds_dma;
	
	
spinlock_t leds_lock;
	
bool led_urb_submitted;

};



static void usb_kbd_irq(struct urb *urb)
{
	struct usb_kbd *kbd = urb->context;
	int i;

	switch (urb->status) {
	case 0:			/* success */
		break;
	case -ECONNRESET:	/* unlink */
	case -ENOENT:
	case -ESHUTDOWN:
		return;
	/* -EPIPE:  should clear the halt */
	default:		/* error */
		goto resubmit;
	}

	for (i = 0; i < 8; i++)
		input_report_key(kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);

	for (i = 2; i < 8; i++) {

		if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
			if (usb_kbd_keycode[kbd->old[i]])
				input_report_key(kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
			else
				hid_info(urb->dev,
					 "Unknown key (scancode %#x) released.\n",
					 kbd->old[i]);
		}

		if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
			if (usb_kbd_keycode[kbd->new[i]])
				input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
			else
				hid_info(urb->dev,
					 "Unknown key (scancode %#x) pressed.\n",
					 kbd->new[i]);
		}
	}

	input_sync(kbd->dev);

	memcpy(kbd->old, kbd->new, 8);

resubmit:
	i = usb_submit_urb (urb, GFP_ATOMIC);
	if (i)
		hid_err(urb->dev, "can't resubmit intr, %s-%s/input0, status %d",
			kbd->usbdev->bus->bus_name,
			kbd->usbdev->devpath, i);
}

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255
74.78%
1
14.29%
david brownell
david brownell
61
17.89%
1
14.29%
greg kroah-hartman
greg kroah-hartman
9
2.64%
1
14.29%
joe perches
joe perches
7
2.05%
1
14.29%
vojtech pavlik
vojtech pavlik
7
2.05%
1
14.29%
adam cozzette
adam cozzette
1
0.29%
1
14.29%
christoph lameter
christoph lameter
1
0.29%
1
14.29%
Total
341
100.00%
7
100.00%



static int usb_kbd_event(struct input_dev *dev, unsigned int type,
			 unsigned int code, int value)
{
	unsigned long flags;
	struct usb_kbd *kbd = input_get_drvdata(dev);

	if (type != EV_LED)
		return -1;

	spin_lock_irqsave(&kbd->leds_lock, flags);
	kbd->newleds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
		       (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
		       (!!test_bit(LED_NUML,    dev->led));

	if (kbd->led_urb_submitted){
		spin_unlock_irqrestore(&kbd->leds_lock, flags);
		return 0;
	}

	if (*(kbd->leds) == kbd->newleds){
		spin_unlock_irqrestore(&kbd->leds_lock, flags);
		return 0;
	}

	*(kbd->leds) = kbd->newleds;
	
	kbd->led->dev = kbd->usbdev;
	if (usb_submit_urb(kbd->led, GFP_ATOMIC))
		pr_err("usb_submit_urb(leds) failed\n");
	else
		kbd->led_urb_submitted = true;
	
	spin_unlock_irqrestore(&kbd->leds_lock, flags);
	
	return 0;
}

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pre-git
168
70.29%
4
33.33%
willem penninckx
willem penninckx
56
23.43%
1
8.33%
david s. miller
david s. miller
6
2.51%
1
8.33%
dmitry torokhov
dmitry torokhov
3
1.26%
1
8.33%
joe perches
joe perches
2
0.84%
1
8.33%
adrian bunk
adrian bunk
1
0.42%
1
8.33%
linus torvalds
linus torvalds
1
0.42%
1
8.33%
greg kroah-hartman
greg kroah-hartman
1
0.42%
1
8.33%
vojtech pavlik
vojtech pavlik
1
0.42%
1
8.33%
Total
239
100.00%
12
100.00%



static void usb_kbd_led(struct urb *urb)
{
	unsigned long flags;
	struct usb_kbd *kbd = urb->context;

	if (urb->status)
		hid_warn(urb->dev, "led urb status %d received\n",
			 urb->status);

	spin_lock_irqsave(&kbd->leds_lock, flags);

	if (*(kbd->leds) == kbd->newleds){
		kbd->led_urb_submitted = false;
		spin_unlock_irqrestore(&kbd->leds_lock, flags);
		return;
	}

	*(kbd->leds) = kbd->newleds;
	
	kbd->led->dev = kbd->usbdev;
	if (usb_submit_urb(kbd->led, GFP_ATOMIC)){
		hid_err(urb->dev, "usb_submit_urb(leds) failed\n");
		kbd->led_urb_submitted = false;
	}
	spin_unlock_irqrestore(&kbd->leds_lock, flags);
	
}

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pre-git
73
50.69%
4
36.36%
willem penninckx
willem penninckx
50
34.72%
1
9.09%
joe perches
joe perches
7
4.86%
1
9.09%
david s. miller
david s. miller
6
4.17%
1
9.09%
greg kroah-hartman
greg kroah-hartman
6
4.17%
2
18.18%
vojtech pavlik
vojtech pavlik
1
0.69%
1
9.09%
linus torvalds
linus torvalds
1
0.69%
1
9.09%
Total
144
100.00%
11
100.00%



static int usb_kbd_open(struct input_dev *dev)
{
	struct usb_kbd *kbd = input_get_drvdata(dev);

	kbd->irq->dev = kbd->usbdev;
	if (usb_submit_urb(kbd->irq, GFP_KERNEL))
		return -EIO;

	return 0;
}

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pre-git
43
87.76%
2
40.00%
dmitry torokhov
dmitry torokhov
3
6.12%
1
20.00%
greg kroah-hartman
greg kroah-hartman
2
4.08%
1
20.00%
linus torvalds
linus torvalds
1
2.04%
1
20.00%
Total
49
100.00%
5
100.00%



static void usb_kbd_close(struct input_dev *dev)
{
	struct usb_kbd *kbd = input_get_drvdata(dev);

	usb_kill_urb(kbd->irq);
}

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24
85.71%
1
33.33%
dmitry torokhov
dmitry torokhov
3
10.71%
1
33.33%
borislav petkov
borislav petkov
1
3.57%
1
33.33%
Total
28
100.00%
3
100.00%



static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
	if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
		return -1;
	if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
		return -1;
	if (!(kbd->new = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &kbd->new_dma)))
		return -1;
	if (!(kbd->cr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
		return -1;
	if (!(kbd->leds = usb_alloc_coherent(dev, 1, GFP_ATOMIC, &kbd->leds_dma)))
		return -1;

	return 0;
}

Contributors
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david s. miller
david s. miller
131
95.62%
1
25.00%
christoph lameter
christoph lameter
2
1.46%
1
25.00%
alan stern
alan stern
2
1.46%
1
25.00%
daniel mack
daniel mack
2
1.46%
1
25.00%
Total
137
100.00%
4
100.00%



static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
{
	usb_free_urb(kbd->irq);
	usb_free_urb(kbd->led);
	usb_free_coherent(dev, 8, kbd->new, kbd->new_dma);
	kfree(kbd->cr);
	usb_free_coherent(dev, 1, kbd->leds, kbd->leds_dma);
}

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david s. miller
64
95.52%
1
33.33%
daniel mack
daniel mack
2
2.99%
1
33.33%
alan stern
alan stern
1
1.49%
1
33.33%
Total
67
100.00%
3
100.00%



static int usb_kbd_probe(struct usb_interface *iface,
			 const struct usb_device_id *id)
{
	struct usb_device *dev = interface_to_usbdev(iface);
	struct usb_host_interface *interface;
	struct usb_endpoint_descriptor *endpoint;
	struct usb_kbd *kbd;
	struct input_dev *input_dev;
	int i, pipe, maxp;
	int error = -ENOMEM;

	interface = iface->cur_altsetting;

	if (interface->desc.bNumEndpoints != 1)
		return -ENODEV;

	endpoint = &interface->endpoint[0].desc;
	if (!usb_endpoint_is_int_in(endpoint))
		return -ENODEV;

	pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
	maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

	kbd = kzalloc(sizeof(struct usb_kbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!kbd || !input_dev)
		goto fail1;

	if (usb_kbd_alloc_mem(dev, kbd))
		goto fail2;

	kbd->usbdev = dev;
	kbd->dev = input_dev;
	spin_lock_init(&kbd->leds_lock);

	if (dev->manufacturer)
		strlcpy(kbd->name, dev->manufacturer, sizeof(kbd->name));

	if (dev->product) {
		if (dev->manufacturer)
			strlcat(kbd->name, " ", sizeof(kbd->name));
		strlcat(kbd->name, dev->product, sizeof(kbd->name));
	}

	if (!strlen(kbd->name))
		snprintf(kbd->name, sizeof(kbd->name),
			 "USB HIDBP Keyboard %04x:%04x",
			 le16_to_cpu(dev->descriptor.idVendor),
			 le16_to_cpu(dev->descriptor.idProduct));

	usb_make_path(dev, kbd->phys, sizeof(kbd->phys));
	strlcat(kbd->phys, "/input0", sizeof(kbd->phys));

	input_dev->name = kbd->name;
	input_dev->phys = kbd->phys;
	usb_to_input_id(dev, &input_dev->id);
	input_dev->dev.parent = &iface->dev;

	input_set_drvdata(input_dev, kbd);

	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
		BIT_MASK(EV_REP);
	input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
		BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_COMPOSE) |
		BIT_MASK(LED_KANA);

	for (i = 0; i < 255; i++)
		set_bit(usb_kbd_keycode[i], input_dev->keybit);
	clear_bit(0, input_dev->keybit);

	input_dev->event = usb_kbd_event;
	input_dev->open = usb_kbd_open;
	input_dev->close = usb_kbd_close;

	usb_fill_int_urb(kbd->irq, dev, pipe,
			 kbd->new, (maxp > 8 ? 8 : maxp),
			 usb_kbd_irq, kbd, endpoint->bInterval);
	kbd->irq->transfer_dma = kbd->new_dma;
	kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
	kbd->cr->bRequest = 0x09;
	kbd->cr->wValue = cpu_to_le16(0x200);
	kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
	kbd->cr->wLength = cpu_to_le16(1);

	usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
			     (void *) kbd->cr, kbd->leds, 1,
			     usb_kbd_led, kbd);
	kbd->led->transfer_dma = kbd->leds_dma;
	kbd->led->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

	error = input_register_device(kbd->dev);
	if (error)
		goto fail2;

	usb_set_intfdata(iface, kbd);
	device_set_wakeup_enable(&dev->dev, 1);
	return 0;

fail2:	
	usb_kbd_free_mem(dev, kbd);
fail1:	
	input_free_device(input_dev);
	kfree(kbd);
	return error;
}

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pre-git
pre-git
313
44.33%
4
19.05%
dmitry torokhov
dmitry torokhov
249
35.27%
3
14.29%
david s. miller
david s. miller
55
7.79%
1
4.76%
linus torvalds
linus torvalds
20
2.83%
2
9.52%
greg kroah-hartman
greg kroah-hartman
20
2.83%
3
14.29%
alan stern
alan stern
12
1.70%
2
9.52%
david brownell
david brownell
10
1.42%
1
4.76%
jiri slaby
jiri slaby
8
1.13%
1
4.76%
willem penninckx
willem penninckx
8
1.13%
1
4.76%
vojtech pavlik
vojtech pavlik
7
0.99%
1
4.76%
luiz fernando capitulino
luiz fernando capitulino
3
0.42%
1
4.76%
marton nemeth
marton nemeth
1
0.14%
1
4.76%
Total
706
100.00%
21
100.00%



static void usb_kbd_disconnect(struct usb_interface *intf)
{
	struct usb_kbd *kbd = usb_get_intfdata (intf);

	usb_set_intfdata(intf, NULL);
	if (kbd) {
		usb_kill_urb(kbd->irq);
		input_unregister_device(kbd->dev);
		usb_kill_urb(kbd->led);
		usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
		kfree(kbd);
	}
}

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pre-git
pre-git
33
47.14%
1
12.50%
greg kroah-hartman
greg kroah-hartman
23
32.86%
2
25.00%
willem penninckx
willem penninckx
7
10.00%
1
12.50%
linus torvalds
linus torvalds
4
5.71%
1
12.50%
david s. miller
david s. miller
2
2.86%
2
25.00%
borislav petkov
borislav petkov
1
1.43%
1
12.50%
Total
70
100.00%
8
100.00%


static struct usb_device_id usb_kbd_id_table [] = {
	{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
		USB_INTERFACE_PROTOCOL_KEYBOARD) },
	{ }						/* Terminating entry */
};

MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);


static struct usb_driver usb_kbd_driver = {
	.name =		"usbkbd",
	.probe =	usb_kbd_probe,
	.disconnect =	usb_kbd_disconnect,
	.id_table =	usb_kbd_id_table,
};


module_usb_driver(usb_kbd_driver);
Overall Contributors
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CommitProp
pre-git
pre-git
1496
60.08%
10
18.52%
david s. miller
david s. miller
285
11.45%
2
3.70%
dmitry torokhov
dmitry torokhov
260
10.44%
4
7.41%
willem penninckx
willem penninckx
128
5.14%
2
3.70%
david brownell
david brownell
72
2.89%
3
5.56%
greg kroah-hartman
greg kroah-hartman
63
2.53%
8
14.81%
vojtech pavlik
vojtech pavlik
60
2.41%
3
5.56%
linus torvalds
linus torvalds
48
1.93%
5
9.26%
joe perches
joe perches
23
0.92%
1
1.85%
alan stern
alan stern
15
0.60%
3
5.56%
jiri slaby
jiri slaby
8
0.32%
1
1.85%
rusty russell
rusty russell
8
0.32%
1
1.85%
michael opdenacker
michael opdenacker
6
0.24%
1
1.85%
daniel mack
daniel mack
4
0.16%
1
1.85%
luiz fernando capitulino
luiz fernando capitulino
3
0.12%
1
1.85%
christoph lameter
christoph lameter
3
0.12%
1
1.85%
adrian bunk
adrian bunk
2
0.08%
2
3.70%
borislav petkov
borislav petkov
2
0.08%
1
1.85%
marton nemeth
marton nemeth
1
0.04%
1
1.85%
adam cozzette
adam cozzette
1
0.04%
1
1.85%
johannes erdfelt
johannes erdfelt
1
0.04%
1
1.85%
lei ming
lei ming
1
0.04%
1
1.85%
Total
2490
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54
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Directory: drivers/hid/usbhid

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