/* * 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) released.\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); } 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; } 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); } 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; } static void usb_kbd_close(struct input_dev *dev) { struct usb_kbd *kbd = input_get_drvdata(dev); usb_kill_urb(kbd->irq); } 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; } 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); } 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; } 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); } } 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);