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398 lines
11 KiB
398 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) 1999-2001 Vojtech Pavlik |
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* |
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* USB HIDBP Keyboard support |
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*/ |
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/* |
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* |
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* Should you need to contact me, the author, you can do so either by |
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* e-mail - mail your message to <[email protected]>, or by paper mail: |
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* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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/init.h> |
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#include <linux/usb/input.h> |
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#include <linux/hid.h> |
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/* |
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* Version Information |
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*/ |
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#define DRIVER_VERSION "" |
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#define DRIVER_AUTHOR "Vojtech Pavlik <[email protected]>" |
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#define DRIVER_DESC "USB HID Boot Protocol keyboard driver" |
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MODULE_AUTHOR(DRIVER_AUTHOR); |
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MODULE_DESCRIPTION(DRIVER_DESC); |
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MODULE_LICENSE("GPL"); |
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static const unsigned char usb_kbd_keycode[256] = { |
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0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38, |
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50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3, |
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4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26, |
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27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64, |
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65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106, |
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105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71, |
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72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190, |
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191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113, |
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115,114, 0, 0, 0,121, 0, 89, 93,124, 92, 94, 95, 0, 0, 0, |
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122,123, 90, 91, 85, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
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29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113, |
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150,158,159,128,136,177,178,176,142,152,173,140 |
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}; |
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/** |
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* struct usb_kbd - state of each attached keyboard |
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* @dev: input device associated with this keyboard |
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* @usbdev: usb device associated with this keyboard |
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* @old: data received in the past from the @irq URB representing which |
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* keys were pressed. By comparing with the current list of keys |
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* that are pressed, we are able to see key releases. |
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* @irq: URB for receiving a list of keys that are pressed when a |
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* new key is pressed or a key that was pressed is released. |
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* @led: URB for sending LEDs (e.g. numlock, ...) |
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* @newleds: data that will be sent with the @led URB representing which LEDs |
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* should be on |
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* @name: Name of the keyboard. @dev's name field points to this buffer |
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* @phys: Physical path of the keyboard. @dev's phys field points to this |
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* buffer |
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* @new: Buffer for the @irq URB |
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* @cr: Control request for @led URB |
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* @leds: Buffer for the @led URB |
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* @new_dma: DMA address for @irq URB |
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* @leds_dma: DMA address for @led URB |
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* @leds_lock: spinlock that protects @leds, @newleds, and @led_urb_submitted |
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* @led_urb_submitted: indicates whether @led is in progress, i.e. it has been |
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* submitted and its completion handler has not returned yet |
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* without resubmitting @led |
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*/ |
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struct usb_kbd { |
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struct input_dev *dev; |
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struct usb_device *usbdev; |
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unsigned char old[8]; |
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struct urb *irq, *led; |
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unsigned char newleds; |
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char name[128]; |
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char phys[64]; |
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unsigned char *new; |
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struct usb_ctrlrequest *cr; |
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unsigned char *leds; |
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dma_addr_t new_dma; |
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dma_addr_t leds_dma; |
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spinlock_t leds_lock; |
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bool led_urb_submitted; |
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}; |
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static void usb_kbd_irq(struct urb *urb) |
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{ |
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struct usb_kbd *kbd = urb->context; |
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int i; |
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switch (urb->status) { |
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case 0: /* success */ |
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break; |
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case -ECONNRESET: /* unlink */ |
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case -ENOENT: |
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case -ESHUTDOWN: |
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return; |
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/* -EPIPE: should clear the halt */ |
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default: /* error */ |
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goto resubmit; |
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} |
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for (i = 0; i < 8; i++) |
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input_report_key(kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1); |
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for (i = 2; i < 8; i++) { |
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if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) { |
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if (usb_kbd_keycode[kbd->old[i]]) |
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input_report_key(kbd->dev, usb_kbd_keycode[kbd->old[i]], 0); |
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else |
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hid_info(urb->dev, |
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"Unknown key (scancode %#x) released.\n", |
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kbd->old[i]); |
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} |
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if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) { |
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if (usb_kbd_keycode[kbd->new[i]]) |
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input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1); |
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else |
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hid_info(urb->dev, |
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"Unknown key (scancode %#x) pressed.\n", |
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kbd->new[i]); |
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} |
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} |
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input_sync(kbd->dev); |
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memcpy(kbd->old, kbd->new, 8); |
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resubmit: |
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i = usb_submit_urb (urb, GFP_ATOMIC); |
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if (i) |
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hid_err(urb->dev, "can't resubmit intr, %s-%s/input0, status %d", |
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kbd->usbdev->bus->bus_name, |
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kbd->usbdev->devpath, i); |
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} |
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static int usb_kbd_event(struct input_dev *dev, unsigned int type, |
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unsigned int code, int value) |
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{ |
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unsigned long flags; |
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struct usb_kbd *kbd = input_get_drvdata(dev); |
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if (type != EV_LED) |
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return -1; |
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spin_lock_irqsave(&kbd->leds_lock, flags); |
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kbd->newleds = (!!test_bit(LED_KANA, dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) | |
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(!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL, dev->led) << 1) | |
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(!!test_bit(LED_NUML, dev->led)); |
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if (kbd->led_urb_submitted){ |
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spin_unlock_irqrestore(&kbd->leds_lock, flags); |
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return 0; |
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} |
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if (*(kbd->leds) == kbd->newleds){ |
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spin_unlock_irqrestore(&kbd->leds_lock, flags); |
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return 0; |
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} |
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*(kbd->leds) = kbd->newleds; |
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kbd->led->dev = kbd->usbdev; |
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if (usb_submit_urb(kbd->led, GFP_ATOMIC)) |
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pr_err("usb_submit_urb(leds) failed\n"); |
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else |
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kbd->led_urb_submitted = true; |
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spin_unlock_irqrestore(&kbd->leds_lock, flags); |
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return 0; |
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} |
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static void usb_kbd_led(struct urb *urb) |
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{ |
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unsigned long flags; |
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struct usb_kbd *kbd = urb->context; |
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if (urb->status) |
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hid_warn(urb->dev, "led urb status %d received\n", |
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urb->status); |
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spin_lock_irqsave(&kbd->leds_lock, flags); |
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if (*(kbd->leds) == kbd->newleds){ |
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kbd->led_urb_submitted = false; |
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spin_unlock_irqrestore(&kbd->leds_lock, flags); |
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return; |
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} |
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*(kbd->leds) = kbd->newleds; |
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kbd->led->dev = kbd->usbdev; |
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if (usb_submit_urb(kbd->led, GFP_ATOMIC)){ |
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hid_err(urb->dev, "usb_submit_urb(leds) failed\n"); |
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kbd->led_urb_submitted = false; |
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} |
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spin_unlock_irqrestore(&kbd->leds_lock, flags); |
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} |
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static int usb_kbd_open(struct input_dev *dev) |
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{ |
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struct usb_kbd *kbd = input_get_drvdata(dev); |
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kbd->irq->dev = kbd->usbdev; |
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if (usb_submit_urb(kbd->irq, GFP_KERNEL)) |
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return -EIO; |
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return 0; |
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} |
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static void usb_kbd_close(struct input_dev *dev) |
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{ |
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struct usb_kbd *kbd = input_get_drvdata(dev); |
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usb_kill_urb(kbd->irq); |
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} |
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static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd) |
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{ |
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if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL))) |
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return -1; |
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if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL))) |
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return -1; |
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if (!(kbd->new = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbd->new_dma))) |
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return -1; |
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if (!(kbd->cr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) |
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return -1; |
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if (!(kbd->leds = usb_alloc_coherent(dev, 1, GFP_KERNEL, &kbd->leds_dma))) |
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return -1; |
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return 0; |
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} |
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static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd) |
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{ |
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usb_free_urb(kbd->irq); |
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usb_free_urb(kbd->led); |
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usb_free_coherent(dev, 8, kbd->new, kbd->new_dma); |
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kfree(kbd->cr); |
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usb_free_coherent(dev, 1, kbd->leds, kbd->leds_dma); |
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} |
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static int usb_kbd_probe(struct usb_interface *iface, |
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const struct usb_device_id *id) |
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{ |
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struct usb_device *dev = interface_to_usbdev(iface); |
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struct usb_host_interface *interface; |
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struct usb_endpoint_descriptor *endpoint; |
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struct usb_kbd *kbd; |
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struct input_dev *input_dev; |
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int i, pipe, maxp; |
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int error = -ENOMEM; |
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interface = iface->cur_altsetting; |
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if (interface->desc.bNumEndpoints != 1) |
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return -ENODEV; |
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endpoint = &interface->endpoint[0].desc; |
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if (!usb_endpoint_is_int_in(endpoint)) |
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return -ENODEV; |
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pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); |
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maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); |
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kbd = kzalloc(sizeof(struct usb_kbd), GFP_KERNEL); |
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input_dev = input_allocate_device(); |
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if (!kbd || !input_dev) |
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goto fail1; |
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if (usb_kbd_alloc_mem(dev, kbd)) |
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goto fail2; |
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kbd->usbdev = dev; |
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kbd->dev = input_dev; |
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spin_lock_init(&kbd->leds_lock); |
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if (dev->manufacturer) |
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strlcpy(kbd->name, dev->manufacturer, sizeof(kbd->name)); |
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if (dev->product) { |
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if (dev->manufacturer) |
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strlcat(kbd->name, " ", sizeof(kbd->name)); |
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strlcat(kbd->name, dev->product, sizeof(kbd->name)); |
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} |
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if (!strlen(kbd->name)) |
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snprintf(kbd->name, sizeof(kbd->name), |
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"USB HIDBP Keyboard %04x:%04x", |
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le16_to_cpu(dev->descriptor.idVendor), |
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le16_to_cpu(dev->descriptor.idProduct)); |
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usb_make_path(dev, kbd->phys, sizeof(kbd->phys)); |
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strlcat(kbd->phys, "/input0", sizeof(kbd->phys)); |
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input_dev->name = kbd->name; |
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input_dev->phys = kbd->phys; |
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usb_to_input_id(dev, &input_dev->id); |
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input_dev->dev.parent = &iface->dev; |
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input_set_drvdata(input_dev, kbd); |
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) | |
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BIT_MASK(EV_REP); |
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input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) | |
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BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_COMPOSE) | |
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BIT_MASK(LED_KANA); |
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for (i = 0; i < 255; i++) |
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set_bit(usb_kbd_keycode[i], input_dev->keybit); |
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clear_bit(0, input_dev->keybit); |
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input_dev->event = usb_kbd_event; |
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input_dev->open = usb_kbd_open; |
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input_dev->close = usb_kbd_close; |
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usb_fill_int_urb(kbd->irq, dev, pipe, |
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kbd->new, (maxp > 8 ? 8 : maxp), |
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usb_kbd_irq, kbd, endpoint->bInterval); |
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kbd->irq->transfer_dma = kbd->new_dma; |
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kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
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kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE; |
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kbd->cr->bRequest = 0x09; |
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kbd->cr->wValue = cpu_to_le16(0x200); |
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kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber); |
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kbd->cr->wLength = cpu_to_le16(1); |
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usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0), |
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(void *) kbd->cr, kbd->leds, 1, |
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usb_kbd_led, kbd); |
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kbd->led->transfer_dma = kbd->leds_dma; |
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kbd->led->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
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error = input_register_device(kbd->dev); |
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if (error) |
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goto fail2; |
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usb_set_intfdata(iface, kbd); |
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device_set_wakeup_enable(&dev->dev, 1); |
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return 0; |
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fail2: |
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usb_kbd_free_mem(dev, kbd); |
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fail1: |
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input_free_device(input_dev); |
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kfree(kbd); |
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return error; |
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} |
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static void usb_kbd_disconnect(struct usb_interface *intf) |
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{ |
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struct usb_kbd *kbd = usb_get_intfdata (intf); |
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usb_set_intfdata(intf, NULL); |
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if (kbd) { |
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usb_kill_urb(kbd->irq); |
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input_unregister_device(kbd->dev); |
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usb_kill_urb(kbd->led); |
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usb_kbd_free_mem(interface_to_usbdev(intf), kbd); |
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kfree(kbd); |
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} |
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} |
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static const struct usb_device_id usb_kbd_id_table[] = { |
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{ USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, |
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USB_INTERFACE_PROTOCOL_KEYBOARD) }, |
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{ } /* Terminating entry */ |
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}; |
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MODULE_DEVICE_TABLE (usb, usb_kbd_id_table); |
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static struct usb_driver usb_kbd_driver = { |
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.name = "usbkbd", |
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.probe = usb_kbd_probe, |
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.disconnect = usb_kbd_disconnect, |
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.id_table = usb_kbd_id_table, |
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}; |
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module_usb_driver(usb_kbd_driver);
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