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-rw-r--r--drivers/hid/usbhid/hid-core.c1114
1 files changed, 1114 insertions, 0 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
new file mode 100644
index 0000000..91d6103
--- /dev/null
+++ b/drivers/hid/usbhid/hid-core.c
@@ -0,0 +1,1114 @@
+/*
+ * USB HID support for Linux
+ *
+ * Copyright (c) 1999 Andreas Gal
+ * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
+ * Copyright (c) 2006-2007 Jiri Kosina
+ */
+
+/*
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mm.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+#include <linux/input.h>
+#include <linux/wait.h>
+
+#include <linux/usb.h>
+
+#include <linux/hid.h>
+#include <linux/hiddev.h>
+#include <linux/hid-debug.h>
+#include "usbhid.h"
+
+/*
+ * Version Information
+ */
+
+#define DRIVER_VERSION "v2.6"
+#define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
+#define DRIVER_DESC "USB HID core driver"
+#define DRIVER_LICENSE "GPL"
+
+static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
+ "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
+/*
+ * Module parameters.
+ */
+
+static unsigned int hid_mousepoll_interval;
+module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
+MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
+
+/* Quirks specified at module load time */
+static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
+module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
+MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
+ " quirks=vendorID:productID:quirks"
+ " where vendorID, productID, and quirks are all in"
+ " 0x-prefixed hex");
+/*
+ * Input submission and I/O error handler.
+ */
+
+static void hid_io_error(struct hid_device *hid);
+
+/* Start up the input URB */
+static int hid_start_in(struct hid_device *hid)
+{
+ unsigned long flags;
+ int rc = 0;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ spin_lock_irqsave(&usbhid->inlock, flags);
+ if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
+ !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
+ rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
+ if (rc != 0)
+ clear_bit(HID_IN_RUNNING, &usbhid->iofl);
+ }
+ spin_unlock_irqrestore(&usbhid->inlock, flags);
+ return rc;
+}
+
+/* I/O retry timer routine */
+static void hid_retry_timeout(unsigned long _hid)
+{
+ struct hid_device *hid = (struct hid_device *) _hid;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
+ if (hid_start_in(hid))
+ hid_io_error(hid);
+}
+
+/* Workqueue routine to reset the device or clear a halt */
+static void hid_reset(struct work_struct *work)
+{
+ struct usbhid_device *usbhid =
+ container_of(work, struct usbhid_device, reset_work);
+ struct hid_device *hid = usbhid->hid;
+ int rc_lock, rc = 0;
+
+ if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
+ dev_dbg(&usbhid->intf->dev, "clear halt\n");
+ rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
+ clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
+ hid_start_in(hid);
+ }
+
+ else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
+ dev_dbg(&usbhid->intf->dev, "resetting device\n");
+ rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
+ if (rc_lock >= 0) {
+ rc = usb_reset_composite_device(hid_to_usb_dev(hid), usbhid->intf);
+ if (rc_lock)
+ usb_unlock_device(hid_to_usb_dev(hid));
+ }
+ clear_bit(HID_RESET_PENDING, &usbhid->iofl);
+ }
+
+ switch (rc) {
+ case 0:
+ if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
+ hid_io_error(hid);
+ break;
+ default:
+ err("can't reset device, %s-%s/input%d, status %d",
+ hid_to_usb_dev(hid)->bus->bus_name,
+ hid_to_usb_dev(hid)->devpath,
+ usbhid->ifnum, rc);
+ /* FALLTHROUGH */
+ case -EHOSTUNREACH:
+ case -ENODEV:
+ case -EINTR:
+ break;
+ }
+}
+
+/* Main I/O error handler */
+static void hid_io_error(struct hid_device *hid)
+{
+ unsigned long flags;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ spin_lock_irqsave(&usbhid->inlock, flags);
+
+ /* Stop when disconnected */
+ if (usb_get_intfdata(usbhid->intf) == NULL)
+ goto done;
+
+ /* If it has been a while since the last error, we'll assume
+ * this a brand new error and reset the retry timeout. */
+ if (time_after(jiffies, usbhid->stop_retry + HZ/2))
+ usbhid->retry_delay = 0;
+
+ /* When an error occurs, retry at increasing intervals */
+ if (usbhid->retry_delay == 0) {
+ usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
+ usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
+ } else if (usbhid->retry_delay < 100)
+ usbhid->retry_delay *= 2;
+
+ if (time_after(jiffies, usbhid->stop_retry)) {
+
+ /* Retries failed, so do a port reset */
+ if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
+ schedule_work(&usbhid->reset_work);
+ goto done;
+ }
+ }
+
+ mod_timer(&usbhid->io_retry,
+ jiffies + msecs_to_jiffies(usbhid->retry_delay));
+done:
+ spin_unlock_irqrestore(&usbhid->inlock, flags);
+}
+
+/*
+ * Input interrupt completion handler.
+ */
+
+static void hid_irq_in(struct urb *urb)
+{
+ struct hid_device *hid = urb->context;
+ struct usbhid_device *usbhid = hid->driver_data;
+ int status;
+
+ switch (urb->status) {
+ case 0: /* success */
+ usbhid->retry_delay = 0;
+ hid_input_report(urb->context, HID_INPUT_REPORT,
+ urb->transfer_buffer,
+ urb->actual_length, 1);
+ break;
+ case -EPIPE: /* stall */
+ clear_bit(HID_IN_RUNNING, &usbhid->iofl);
+ set_bit(HID_CLEAR_HALT, &usbhid->iofl);
+ schedule_work(&usbhid->reset_work);
+ return;
+ case -ECONNRESET: /* unlink */
+ case -ENOENT:
+ case -ESHUTDOWN: /* unplug */
+ clear_bit(HID_IN_RUNNING, &usbhid->iofl);
+ return;
+ case -EILSEQ: /* protocol error or unplug */
+ case -EPROTO: /* protocol error or unplug */
+ case -ETIME: /* protocol error or unplug */
+ case -ETIMEDOUT: /* Should never happen, but... */
+ clear_bit(HID_IN_RUNNING, &usbhid->iofl);
+ hid_io_error(hid);
+ return;
+ default: /* error */
+ warn("input irq status %d received", urb->status);
+ }
+
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+ if (status) {
+ clear_bit(HID_IN_RUNNING, &usbhid->iofl);
+ if (status != -EPERM) {
+ err("can't resubmit intr, %s-%s/input%d, status %d",
+ hid_to_usb_dev(hid)->bus->bus_name,
+ hid_to_usb_dev(hid)->devpath,
+ usbhid->ifnum, status);
+ hid_io_error(hid);
+ }
+ }
+}
+
+static int hid_submit_out(struct hid_device *hid)
+{
+ struct hid_report *report;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ report = usbhid->out[usbhid->outtail];
+
+ hid_output_report(report, usbhid->outbuf);
+ usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
+ usbhid->urbout->dev = hid_to_usb_dev(hid);
+
+ dbg("submitting out urb");
+
+ if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
+ err("usb_submit_urb(out) failed");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int hid_submit_ctrl(struct hid_device *hid)
+{
+ struct hid_report *report;
+ unsigned char dir;
+ int len;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ report = usbhid->ctrl[usbhid->ctrltail].report;
+ dir = usbhid->ctrl[usbhid->ctrltail].dir;
+
+ len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
+ if (dir == USB_DIR_OUT) {
+ hid_output_report(report, usbhid->ctrlbuf);
+ usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
+ usbhid->urbctrl->transfer_buffer_length = len;
+ } else {
+ int maxpacket, padlen;
+
+ usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
+ maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
+ if (maxpacket > 0) {
+ padlen = (len + maxpacket - 1) / maxpacket;
+ padlen *= maxpacket;
+ if (padlen > usbhid->bufsize)
+ padlen = usbhid->bufsize;
+ } else
+ padlen = 0;
+ usbhid->urbctrl->transfer_buffer_length = padlen;
+ }
+ usbhid->urbctrl->dev = hid_to_usb_dev(hid);
+
+ usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
+ usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
+ usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
+ usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
+ usbhid->cr->wLength = cpu_to_le16(len);
+
+ dbg("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u",
+ usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
+ usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
+
+ if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
+ err("usb_submit_urb(ctrl) failed");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Output interrupt completion handler.
+ */
+
+static void hid_irq_out(struct urb *urb)
+{
+ struct hid_device *hid = urb->context;
+ struct usbhid_device *usbhid = hid->driver_data;
+ unsigned long flags;
+ int unplug = 0;
+
+ switch (urb->status) {
+ case 0: /* success */
+ break;
+ case -ESHUTDOWN: /* unplug */
+ unplug = 1;
+ case -EILSEQ: /* protocol error or unplug */
+ case -EPROTO: /* protocol error or unplug */
+ case -ECONNRESET: /* unlink */
+ case -ENOENT:
+ break;
+ default: /* error */
+ warn("output irq status %d received", urb->status);
+ }
+
+ spin_lock_irqsave(&usbhid->outlock, flags);
+
+ if (unplug)
+ usbhid->outtail = usbhid->outhead;
+ else
+ usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
+
+ if (usbhid->outhead != usbhid->outtail) {
+ if (hid_submit_out(hid)) {
+ clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
+ wake_up(&hid->wait);
+ }
+ spin_unlock_irqrestore(&usbhid->outlock, flags);
+ return;
+ }
+
+ clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
+ spin_unlock_irqrestore(&usbhid->outlock, flags);
+ wake_up(&hid->wait);
+}
+
+/*
+ * Control pipe completion handler.
+ */
+
+static void hid_ctrl(struct urb *urb)
+{
+ struct hid_device *hid = urb->context;
+ struct usbhid_device *usbhid = hid->driver_data;
+ unsigned long flags;
+ int unplug = 0;
+
+ spin_lock_irqsave(&usbhid->ctrllock, flags);
+
+ switch (urb->status) {
+ case 0: /* success */
+ if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
+ hid_input_report(urb->context, usbhid->ctrl[usbhid->ctrltail].report->type,
+ urb->transfer_buffer, urb->actual_length, 0);
+ break;
+ case -ESHUTDOWN: /* unplug */
+ unplug = 1;
+ case -EILSEQ: /* protocol error or unplug */
+ case -EPROTO: /* protocol error or unplug */
+ case -ECONNRESET: /* unlink */
+ case -ENOENT:
+ case -EPIPE: /* report not available */
+ break;
+ default: /* error */
+ warn("ctrl urb status %d received", urb->status);
+ }
+
+ if (unplug)
+ usbhid->ctrltail = usbhid->ctrlhead;
+ else
+ usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
+
+ if (usbhid->ctrlhead != usbhid->ctrltail) {
+ if (hid_submit_ctrl(hid)) {
+ clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+ wake_up(&hid->wait);
+ }
+ spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ return;
+ }
+
+ clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+ spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ wake_up(&hid->wait);
+}
+
+void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
+{
+ int head;
+ unsigned long flags;
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
+ return;
+
+ if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
+
+ spin_lock_irqsave(&usbhid->outlock, flags);
+
+ if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
+ spin_unlock_irqrestore(&usbhid->outlock, flags);
+ warn("output queue full");
+ return;
+ }
+
+ usbhid->out[usbhid->outhead] = report;
+ usbhid->outhead = head;
+
+ if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
+ if (hid_submit_out(hid))
+ clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
+
+ spin_unlock_irqrestore(&usbhid->outlock, flags);
+ return;
+ }
+
+ spin_lock_irqsave(&usbhid->ctrllock, flags);
+
+ if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
+ spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+ warn("control queue full");
+ return;
+ }
+
+ usbhid->ctrl[usbhid->ctrlhead].report = report;
+ usbhid->ctrl[usbhid->ctrlhead].dir = dir;
+ usbhid->ctrlhead = head;
+
+ if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
+ if (hid_submit_ctrl(hid))
+ clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
+
+ spin_unlock_irqrestore(&usbhid->ctrllock, flags);
+}
+
+static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
+{
+ struct hid_device *hid = dev->private;
+ struct hid_field *field;
+ int offset;
+
+ if (type == EV_FF)
+ return input_ff_event(dev, type, code, value);
+
+ if (type != EV_LED)
+ return -1;
+
+ if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
+ warn("event field not found");
+ return -1;
+ }
+
+ hid_set_field(field, offset, value);
+ usbhid_submit_report(hid, field->report, USB_DIR_OUT);
+
+ return 0;
+}
+
+int usbhid_wait_io(struct hid_device *hid)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ if (!wait_event_timeout(hid->wait, (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
+ !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
+ 10*HZ)) {
+ dbg("timeout waiting for ctrl or out queue to clear");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
+{
+ return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
+ ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
+}
+
+static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
+ unsigned char type, void *buf, int size)
+{
+ int result, retries = 4;
+
+ memset(buf, 0, size);
+
+ do {
+ result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
+ (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
+ retries--;
+ } while (result < size && retries);
+ return result;
+}
+
+int usbhid_open(struct hid_device *hid)
+{
+ ++hid->open;
+ if (hid_start_in(hid))
+ hid_io_error(hid);
+ return 0;
+}
+
+void usbhid_close(struct hid_device *hid)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ if (!--hid->open)
+ usb_kill_urb(usbhid->urbin);
+}
+
+/*
+ * Initialize all reports
+ */
+
+void usbhid_init_reports(struct hid_device *hid)
+{
+ struct hid_report *report;
+ struct usbhid_device *usbhid = hid->driver_data;
+ int err, ret;
+
+ list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
+ usbhid_submit_report(hid, report, USB_DIR_IN);
+
+ list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
+ usbhid_submit_report(hid, report, USB_DIR_IN);
+
+ err = 0;
+ ret = usbhid_wait_io(hid);
+ while (ret) {
+ err |= ret;
+ if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
+ usb_kill_urb(usbhid->urbctrl);
+ if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
+ usb_kill_urb(usbhid->urbout);
+ ret = usbhid_wait_io(hid);
+ }
+
+ if (err)
+ warn("timeout initializing reports");
+}
+
+/*
+ * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
+ */
+static int hid_find_field_early(struct hid_device *hid, unsigned int page,
+ unsigned int hid_code, struct hid_field **pfield)
+{
+ struct hid_report *report;
+ struct hid_field *field;
+ struct hid_usage *usage;
+ int i, j;
+
+ list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
+ for (i = 0; i < report->maxfield; i++) {
+ field = report->field[i];
+ for (j = 0; j < field->maxusage; j++) {
+ usage = &field->usage[j];
+ if ((usage->hid & HID_USAGE_PAGE) == page &&
+ (usage->hid & 0xFFFF) == hid_code) {
+ *pfield = field;
+ return j;
+ }
+ }
+ }
+ }
+ return -1;
+}
+
+static void usbhid_set_leds(struct hid_device *hid)
+{
+ struct hid_field *field;
+ int offset;
+
+ if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
+ hid_set_field(field, offset, 0);
+ usbhid_submit_report(hid, field->report, USB_DIR_OUT);
+ }
+}
+
+/*
+ * Traverse the supplied list of reports and find the longest
+ */
+static void hid_find_max_report(struct hid_device *hid, unsigned int type, int *max)
+{
+ struct hid_report *report;
+ int size;
+
+ list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
+ size = ((report->size - 1) >> 3) + 1;
+ if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
+ size++;
+ if (*max < size)
+ *max = size;
+ }
+}
+
+static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
+ return -1;
+ if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
+ return -1;
+ if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
+ return -1;
+ if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
+ return -1;
+
+ return 0;
+}
+
+static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
+{
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ if (usbhid->inbuf)
+ usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
+ if (usbhid->outbuf)
+ usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
+ if (usbhid->cr)
+ usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
+ if (usbhid->ctrlbuf)
+ usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
+}
+
+/*
+ * Cherry Cymotion keyboard have an invalid HID report descriptor,
+ * that needs fixing before we can parse it.
+ */
+
+static void hid_fixup_cymotion_descriptor(char *rdesc, int rsize)
+{
+ if (rsize >= 17 && rdesc[11] == 0x3c && rdesc[12] == 0x02) {
+ info("Fixing up Cherry Cymotion report descriptor");
+ rdesc[11] = rdesc[16] = 0xff;
+ rdesc[12] = rdesc[17] = 0x03;
+ }
+}
+
+/*
+ * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
+ * to "operational". Without this, the ps3 controller will not report any
+ * events.
+ */
+static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
+{
+ int result;
+ char *buf = kmalloc(18, GFP_KERNEL);
+
+ if (!buf)
+ return;
+
+ result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ HID_REQ_GET_REPORT,
+ USB_DIR_IN | USB_TYPE_CLASS |
+ USB_RECIP_INTERFACE,
+ (3 << 8) | 0xf2, ifnum, buf, 17,
+ USB_CTRL_GET_TIMEOUT);
+
+ if (result < 0)
+ err("%s failed: %d\n", __func__, result);
+
+ kfree(buf);
+}
+
+/*
+ * Certain Logitech keyboards send in report #3 keys which are far
+ * above the logical maximum described in descriptor. This extends
+ * the original value of 0x28c of logical maximum to 0x104d
+ */
+static void hid_fixup_logitech_descriptor(unsigned char *rdesc, int rsize)
+{
+ if (rsize >= 90 && rdesc[83] == 0x26
+ && rdesc[84] == 0x8c
+ && rdesc[85] == 0x02) {
+ info("Fixing up Logitech keyboard report descriptor");
+ rdesc[84] = rdesc[89] = 0x4d;
+ rdesc[85] = rdesc[90] = 0x10;
+ }
+}
+
+static struct hid_device *usb_hid_configure(struct usb_interface *intf)
+{
+ struct usb_host_interface *interface = intf->cur_altsetting;
+ struct usb_device *dev = interface_to_usbdev (intf);
+ struct hid_descriptor *hdesc;
+ struct hid_device *hid;
+ u32 quirks = 0;
+ unsigned rsize = 0;
+ char *rdesc;
+ int n, len, insize = 0;
+ struct usbhid_device *usbhid;
+
+ quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
+
+ /* Many keyboards and mice don't like to be polled for reports,
+ * so we will always set the HID_QUIRK_NOGET flag for them. */
+ if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
+ if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
+ interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
+ quirks |= HID_QUIRK_NOGET;
+ }
+
+ if (quirks & HID_QUIRK_IGNORE)
+ return NULL;
+
+ if ((quirks & HID_QUIRK_IGNORE_MOUSE) &&
+ (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE))
+ return NULL;
+
+
+ if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
+ (!interface->desc.bNumEndpoints ||
+ usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
+ dbg("class descriptor not present\n");
+ return NULL;
+ }
+
+ for (n = 0; n < hdesc->bNumDescriptors; n++)
+ if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
+ rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
+
+ if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
+ dbg("weird size of report descriptor (%u)", rsize);
+ return NULL;
+ }
+
+ if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
+ dbg("couldn't allocate rdesc memory");
+ return NULL;
+ }
+
+ hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
+
+ if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
+ dbg("reading report descriptor failed");
+ kfree(rdesc);
+ return NULL;
+ }
+
+ if ((quirks & HID_QUIRK_CYMOTION))
+ hid_fixup_cymotion_descriptor(rdesc, rsize);
+
+ if (quirks & HID_QUIRK_LOGITECH_DESCRIPTOR)
+ hid_fixup_logitech_descriptor(rdesc, rsize);
+
+#ifdef CONFIG_HID_DEBUG
+ printk(KERN_DEBUG __FILE__ ": report descriptor (size %u, read %d) = ", rsize, n);
+ for (n = 0; n < rsize; n++)
+ printk(" %02x", (unsigned char) rdesc[n]);
+ printk("\n");
+#endif
+
+ if (!(hid = hid_parse_report(rdesc, n))) {
+ dbg("parsing report descriptor failed");
+ kfree(rdesc);
+ return NULL;
+ }
+
+ kfree(rdesc);
+ hid->quirks = quirks;
+
+ if (!(usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL)))
+ goto fail;
+
+ hid->driver_data = usbhid;
+ usbhid->hid = hid;
+
+ usbhid->bufsize = HID_MIN_BUFFER_SIZE;
+ hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
+ hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
+ hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
+
+ if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
+ usbhid->bufsize = HID_MAX_BUFFER_SIZE;
+
+ hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
+
+ if (insize > HID_MAX_BUFFER_SIZE)
+ insize = HID_MAX_BUFFER_SIZE;
+
+ if (hid_alloc_buffers(dev, hid)) {
+ hid_free_buffers(dev, hid);
+ goto fail;
+ }
+
+ for (n = 0; n < interface->desc.bNumEndpoints; n++) {
+
+ struct usb_endpoint_descriptor *endpoint;
+ int pipe;
+ int interval;
+
+ endpoint = &interface->endpoint[n].desc;
+ if ((endpoint->bmAttributes & 3) != 3) /* Not an interrupt endpoint */
+ continue;
+
+ interval = endpoint->bInterval;
+
+ /* Change the polling interval of mice. */
+ if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
+ interval = hid_mousepoll_interval;
+
+ if (usb_endpoint_dir_in(endpoint)) {
+ if (usbhid->urbin)
+ continue;
+ if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
+ goto fail;
+ pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
+ usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
+ hid_irq_in, hid, interval);
+ usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
+ usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ } else {
+ if (usbhid->urbout)
+ continue;
+ if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
+ goto fail;
+ pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
+ usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
+ hid_irq_out, hid, interval);
+ usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
+ usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ }
+ }
+
+ if (!usbhid->urbin) {
+ err("couldn't find an input interrupt endpoint");
+ goto fail;
+ }
+
+ init_waitqueue_head(&hid->wait);
+
+ INIT_WORK(&usbhid->reset_work, hid_reset);
+ setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
+
+ spin_lock_init(&usbhid->inlock);
+ spin_lock_init(&usbhid->outlock);
+ spin_lock_init(&usbhid->ctrllock);
+
+ hid->version = le16_to_cpu(hdesc->bcdHID);
+ hid->country = hdesc->bCountryCode;
+ hid->dev = &intf->dev;
+ usbhid->intf = intf;
+ usbhid->ifnum = interface->desc.bInterfaceNumber;
+
+ hid->name[0] = 0;
+
+ if (dev->manufacturer)
+ strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
+
+ if (dev->product) {
+ if (dev->manufacturer)
+ strlcat(hid->name, " ", sizeof(hid->name));
+ strlcat(hid->name, dev->product, sizeof(hid->name));
+ }
+
+ if (!strlen(hid->name))
+ snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
+ le16_to_cpu(dev->descriptor.idVendor),
+ le16_to_cpu(dev->descriptor.idProduct));
+
+ hid->bus = BUS_USB;
+ hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
+ hid->product = le16_to_cpu(dev->descriptor.idProduct);
+
+ usb_make_path(dev, hid->phys, sizeof(hid->phys));
+ strlcat(hid->phys, "/input", sizeof(hid->phys));
+ len = strlen(hid->phys);
+ if (len < sizeof(hid->phys) - 1)
+ snprintf(hid->phys + len, sizeof(hid->phys) - len,
+ "%d", intf->altsetting[0].desc.bInterfaceNumber);
+
+ if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
+ hid->uniq[0] = 0;
+
+ usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
+ if (!usbhid->urbctrl)
+ goto fail;
+
+ usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
+ usbhid->ctrlbuf, 1, hid_ctrl, hid);
+ usbhid->urbctrl->setup_dma = usbhid->cr_dma;
+ usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
+ usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
+ hid->hidinput_input_event = usb_hidinput_input_event;
+ hid->hid_open = usbhid_open;
+ hid->hid_close = usbhid_close;
+#ifdef CONFIG_USB_HIDDEV
+ hid->hiddev_hid_event = hiddev_hid_event;
+ hid->hiddev_report_event = hiddev_report_event;
+#endif
+ return hid;
+
+fail:
+ usb_free_urb(usbhid->urbin);
+ usb_free_urb(usbhid->urbout);
+ usb_free_urb(usbhid->urbctrl);
+ hid_free_buffers(dev, hid);
+ hid_free_device(hid);
+
+ return NULL;
+}
+
+static void hid_disconnect(struct usb_interface *intf)
+{
+ struct hid_device *hid = usb_get_intfdata (intf);
+ struct usbhid_device *usbhid;
+
+ if (!hid)
+ return;
+
+ usbhid = hid->driver_data;
+
+ spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
+ usb_set_intfdata(intf, NULL);
+ spin_unlock_irq(&usbhid->inlock);
+ usb_kill_urb(usbhid->urbin);
+ usb_kill_urb(usbhid->urbout);
+ usb_kill_urb(usbhid->urbctrl);
+
+ del_timer_sync(&usbhid->io_retry);
+ flush_scheduled_work();
+
+ if (hid->claimed & HID_CLAIMED_INPUT)
+ hidinput_disconnect(hid);
+ if (hid->claimed & HID_CLAIMED_HIDDEV)
+ hiddev_disconnect(hid);
+
+ usb_free_urb(usbhid->urbin);
+ usb_free_urb(usbhid->urbctrl);
+ usb_free_urb(usbhid->urbout);
+
+ hid_free_buffers(hid_to_usb_dev(hid), hid);
+ hid_free_device(hid);
+}
+
+static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct hid_device *hid;
+ char path[64];
+ int i;
+ char *c;
+
+ dbg("HID probe called for ifnum %d",
+ intf->altsetting->desc.bInterfaceNumber);
+
+ if (!(hid = usb_hid_configure(intf)))
+ return -ENODEV;
+
+ usbhid_init_reports(hid);
+ hid_dump_device(hid);
+ if (hid->quirks & HID_QUIRK_RESET_LEDS)
+ usbhid_set_leds(hid);
+
+ if (!hidinput_connect(hid))
+ hid->claimed |= HID_CLAIMED_INPUT;
+ if (!hiddev_connect(hid))
+ hid->claimed |= HID_CLAIMED_HIDDEV;
+
+ usb_set_intfdata(intf, hid);
+
+ if (!hid->claimed) {
+ printk ("HID device not claimed by input or hiddev\n");
+ hid_disconnect(intf);
+ return -ENODEV;
+ }
+
+ if ((hid->claimed & HID_CLAIMED_INPUT))
+ hid_ff_init(hid);
+
+ if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
+ hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
+ intf->cur_altsetting->desc.bInterfaceNumber);
+
+ printk(KERN_INFO);
+
+ if (hid->claimed & HID_CLAIMED_INPUT)
+ printk("input");
+ if (hid->claimed == (HID_CLAIMED_INPUT | HID_CLAIMED_HIDDEV))
+ printk(",");
+ if (hid->claimed & HID_CLAIMED_HIDDEV)
+ printk("hiddev%d", hid->minor);
+
+ c = "Device";
+ for (i = 0; i < hid->maxcollection; i++) {
+ if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
+ (hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
+ (hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
+ c = hid_types[hid->collection[i].usage & 0xffff];
+ break;
+ }
+ }
+
+ usb_make_path(interface_to_usbdev(intf), path, 63);
+
+ printk(": USB HID v%x.%02x %s [%s] on %s\n",
+ hid->version >> 8, hid->version & 0xff, c, hid->name, path);
+
+ return 0;
+}
+
+static int hid_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct hid_device *hid = usb_get_intfdata (intf);
+ struct usbhid_device *usbhid = hid->driver_data;
+
+ spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
+ set_bit(HID_SUSPENDED, &usbhid->iofl);
+ spin_unlock_irq(&usbhid->inlock);
+ del_timer(&usbhid->io_retry);
+ usb_kill_urb(usbhid->urbin);
+ dev_dbg(&intf->dev, "suspend\n");
+ return 0;
+}
+
+static int hid_resume(struct usb_interface *intf)
+{
+ struct hid_device *hid = usb_get_intfdata (intf);
+ struct usbhid_device *usbhid = hid->driver_data;
+ int status;
+
+ clear_bit(HID_SUSPENDED, &usbhid->iofl);
+ usbhid->retry_delay = 0;
+ status = hid_start_in(hid);
+ dev_dbg(&intf->dev, "resume status %d\n", status);
+ return status;
+}
+
+/* Treat USB reset pretty much the same as suspend/resume */
+static void hid_pre_reset(struct usb_interface *intf)
+{
+ /* FIXME: What if the interface is already suspended? */
+ hid_suspend(intf, PMSG_ON);
+}
+
+static void hid_post_reset(struct usb_interface *intf)
+{
+ struct usb_device *dev = interface_to_usbdev (intf);
+
+ hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
+ /* FIXME: Any more reinitialization needed? */
+
+ hid_resume(intf);
+}
+
+static struct usb_device_id hid_usb_ids [] = {
+ { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
+ .bInterfaceClass = USB_INTERFACE_CLASS_HID },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, hid_usb_ids);
+
+static struct usb_driver hid_driver = {
+ .name = "usbhid",
+ .probe = hid_probe,
+ .disconnect = hid_disconnect,
+ .suspend = hid_suspend,
+ .resume = hid_resume,
+ .pre_reset = hid_pre_reset,
+ .post_reset = hid_post_reset,
+ .id_table = hid_usb_ids,
+};
+
+static int __init hid_init(void)
+{
+ int retval;
+ retval = usbhid_quirks_init(quirks_param);
+ if (retval)
+ goto usbhid_quirks_init_fail;
+ retval = hiddev_init();
+ if (retval)
+ goto hiddev_init_fail;
+ retval = usb_register(&hid_driver);
+ if (retval)
+ goto usb_register_fail;
+ info(DRIVER_VERSION ":" DRIVER_DESC);
+
+ return 0;
+usb_register_fail:
+ hiddev_exit();
+hiddev_init_fail:
+ usbhid_quirks_exit();
+usbhid_quirks_init_fail:
+ return retval;
+}
+
+static void __exit hid_exit(void)
+{
+ usb_deregister(&hid_driver);
+ hiddev_exit();
+ usbhid_quirks_exit();
+}
+
+module_init(hid_init);
+module_exit(hid_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
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