+++ /dev/null
-/* -*- linux-c -*-
-
-GTCO digitizer USB driver
-
-TO CHECK: Is pressure done right on report 5?
-
-Copyright (C) 2006 GTCO CalComp
-
-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; version 2
-of the License.
-
-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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation, and that the name of GTCO-CalComp not be used in advertising
-or publicity pertaining to distribution of the software without specific,
-written prior permission. GTCO-CalComp makes no representations about the
-suitability of this software for any purpose. It is provided "as is"
-without express or implied warranty.
-
-GTCO-CALCOMP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
-INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
-EVENT SHALL GTCO-CALCOMP BE LIABLE FOR ANY SPECIAL, INDIRECT OR
-CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
-DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
-TORTIOUS ACTIONS, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-PERFORMANCE OF THIS SOFTWARE.
-
-GTCO CalComp, Inc.
-7125 Riverwood Drive
-Columbia, MD 21046
-
-Jeremy Roberson jroberson@gtcocalcomp.com
-Scott Hill shill@gtcocalcomp.com
-*/
-
-
-
-/*#define DEBUG*/
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <linux/usb.h>
-#include <linux/uaccess.h>
-#include <asm/unaligned.h>
-#include <asm/byteorder.h>
-#include <linux/bitops.h>
-
-#include <linux/usb/input.h>
-
-/* Version with a Major number of 2 is for kernel inclusion only. */
-#define GTCO_VERSION "2.00.0006"
-
-
-/* MACROS */
-
-#define VENDOR_ID_GTCO 0x078C
-#define PID_400 0x400
-#define PID_401 0x401
-#define PID_1000 0x1000
-#define PID_1001 0x1001
-#define PID_1002 0x1002
-
-/* Max size of a single report */
-#define REPORT_MAX_SIZE 10
-#define MAX_COLLECTION_LEVELS 10
-
-
-/* Bitmask whether pen is in range */
-#define MASK_INRANGE 0x20
-#define MASK_BUTTON 0x01F
-
-#define PATHLENGTH 64
-
-/* DATA STRUCTURES */
-
-/* Device table */
-static const struct usb_device_id gtco_usbid_table[] = {
- { USB_DEVICE(VENDOR_ID_GTCO, PID_400) },
- { USB_DEVICE(VENDOR_ID_GTCO, PID_401) },
- { USB_DEVICE(VENDOR_ID_GTCO, PID_1000) },
- { USB_DEVICE(VENDOR_ID_GTCO, PID_1001) },
- { USB_DEVICE(VENDOR_ID_GTCO, PID_1002) },
- { }
-};
-MODULE_DEVICE_TABLE (usb, gtco_usbid_table);
-
-
-/* Structure to hold all of our device specific stuff */
-struct gtco {
-
- struct input_dev *inputdevice; /* input device struct pointer */
- struct usb_interface *intf; /* the usb interface for this device */
- struct urb *urbinfo; /* urb for incoming reports */
- dma_addr_t buf_dma; /* dma addr of the data buffer*/
- unsigned char * buffer; /* databuffer for reports */
-
- char usbpath[PATHLENGTH];
- int openCount;
-
- /* Information pulled from Report Descriptor */
- u32 usage;
- u32 min_X;
- u32 max_X;
- u32 min_Y;
- u32 max_Y;
- s8 mintilt_X;
- s8 maxtilt_X;
- s8 mintilt_Y;
- s8 maxtilt_Y;
- u32 maxpressure;
- u32 minpressure;
-};
-
-
-
-/* Code for parsing the HID REPORT DESCRIPTOR */
-
-/* From HID1.11 spec */
-struct hid_descriptor
-{
- struct usb_descriptor_header header;
- __le16 bcdHID;
- u8 bCountryCode;
- u8 bNumDescriptors;
- u8 bDescriptorType;
- __le16 wDescriptorLength;
-} __attribute__ ((packed));
-
-
-#define HID_DESCRIPTOR_SIZE 9
-#define HID_DEVICE_TYPE 33
-#define REPORT_DEVICE_TYPE 34
-
-
-#define PREF_TAG(x) ((x)>>4)
-#define PREF_TYPE(x) ((x>>2)&0x03)
-#define PREF_SIZE(x) ((x)&0x03)
-
-#define TYPE_MAIN 0
-#define TYPE_GLOBAL 1
-#define TYPE_LOCAL 2
-#define TYPE_RESERVED 3
-
-#define TAG_MAIN_INPUT 0x8
-#define TAG_MAIN_OUTPUT 0x9
-#define TAG_MAIN_FEATURE 0xB
-#define TAG_MAIN_COL_START 0xA
-#define TAG_MAIN_COL_END 0xC
-
-#define TAG_GLOB_USAGE 0
-#define TAG_GLOB_LOG_MIN 1
-#define TAG_GLOB_LOG_MAX 2
-#define TAG_GLOB_PHYS_MIN 3
-#define TAG_GLOB_PHYS_MAX 4
-#define TAG_GLOB_UNIT_EXP 5
-#define TAG_GLOB_UNIT 6
-#define TAG_GLOB_REPORT_SZ 7
-#define TAG_GLOB_REPORT_ID 8
-#define TAG_GLOB_REPORT_CNT 9
-#define TAG_GLOB_PUSH 10
-#define TAG_GLOB_POP 11
-
-#define TAG_GLOB_MAX 12
-
-#define DIGITIZER_USAGE_TIP_PRESSURE 0x30
-#define DIGITIZER_USAGE_TILT_X 0x3D
-#define DIGITIZER_USAGE_TILT_Y 0x3E
-
-
-/*
- * This is an abbreviated parser for the HID Report Descriptor. We
- * know what devices we are talking to, so this is by no means meant
- * to be generic. We can make some safe assumptions:
- *
- * - We know there are no LONG tags, all short
- * - We know that we have no MAIN Feature and MAIN Output items
- * - We know what the IRQ reports are supposed to look like.
- *
- * The main purpose of this is to use the HID report desc to figure
- * out the mins and maxs of the fields in the IRQ reports. The IRQ
- * reports for 400/401 change slightly if the max X is bigger than 64K.
- *
- */
-static void parse_hid_report_descriptor(struct gtco *device, char * report,
- int length)
-{
- struct device *ddev = &device->intf->dev;
- int x, i = 0;
-
- /* Tag primitive vars */
- __u8 prefix;
- __u8 size;
- __u8 tag;
- __u8 type;
- __u8 data = 0;
- __u16 data16 = 0;
- __u32 data32 = 0;
-
- /* For parsing logic */
- int inputnum = 0;
- __u32 usage = 0;
-
- /* Global Values, indexed by TAG */
- __u32 globalval[TAG_GLOB_MAX];
- __u32 oldval[TAG_GLOB_MAX];
-
- /* Debug stuff */
- char maintype = 'x';
- char globtype[12];
- int indent = 0;
- char indentstr[MAX_COLLECTION_LEVELS + 1] = { 0 };
-
- dev_dbg(ddev, "======>>>>>>PARSE<<<<<<======\n");
-
- /* Walk this report and pull out the info we need */
- while (i < length) {
- prefix = report[i++];
-
- /* Determine data size and save the data in the proper variable */
- size = (1U << PREF_SIZE(prefix)) >> 1;
- if (i + size > length) {
- dev_err(ddev,
- "Not enough data (need %d, have %d)\n",
- i + size, length);
- break;
- }
-
- switch (size) {
- case 1:
- data = report[i];
- break;
- case 2:
- data16 = get_unaligned_le16(&report[i]);
- break;
- case 4:
- data32 = get_unaligned_le32(&report[i]);
- break;
- }
-
- /* Skip size of data */
- i += size;
-
- /* What we do depends on the tag type */
- tag = PREF_TAG(prefix);
- type = PREF_TYPE(prefix);
- switch (type) {
- case TYPE_MAIN:
- strcpy(globtype, "");
- switch (tag) {
-
- case TAG_MAIN_INPUT:
- /*
- * The INPUT MAIN tag signifies this is
- * information from a report. We need to
- * figure out what it is and store the
- * min/max values
- */
-
- maintype = 'I';
- if (data == 2)
- strcpy(globtype, "Variable");
- else if (data == 3)
- strcpy(globtype, "Var|Const");
-
- dev_dbg(ddev, "::::: Saving Report: %d input #%d Max: 0x%X(%d) Min:0x%X(%d) of %d bits\n",
- globalval[TAG_GLOB_REPORT_ID], inputnum,
- globalval[TAG_GLOB_LOG_MAX], globalval[TAG_GLOB_LOG_MAX],
- globalval[TAG_GLOB_LOG_MIN], globalval[TAG_GLOB_LOG_MIN],
- globalval[TAG_GLOB_REPORT_SZ] * globalval[TAG_GLOB_REPORT_CNT]);
-
-
- /*
- We can assume that the first two input items
- are always the X and Y coordinates. After
- that, we look for everything else by
- local usage value
- */
- switch (inputnum) {
- case 0: /* X coord */
- dev_dbg(ddev, "GER: X Usage: 0x%x\n", usage);
- if (device->max_X == 0) {
- device->max_X = globalval[TAG_GLOB_LOG_MAX];
- device->min_X = globalval[TAG_GLOB_LOG_MIN];
- }
- break;
-
- case 1: /* Y coord */
- dev_dbg(ddev, "GER: Y Usage: 0x%x\n", usage);
- if (device->max_Y == 0) {
- device->max_Y = globalval[TAG_GLOB_LOG_MAX];
- device->min_Y = globalval[TAG_GLOB_LOG_MIN];
- }
- break;
-
- default:
- /* Tilt X */
- if (usage == DIGITIZER_USAGE_TILT_X) {
- if (device->maxtilt_X == 0) {
- device->maxtilt_X = globalval[TAG_GLOB_LOG_MAX];
- device->mintilt_X = globalval[TAG_GLOB_LOG_MIN];
- }
- }
-
- /* Tilt Y */
- if (usage == DIGITIZER_USAGE_TILT_Y) {
- if (device->maxtilt_Y == 0) {
- device->maxtilt_Y = globalval[TAG_GLOB_LOG_MAX];
- device->mintilt_Y = globalval[TAG_GLOB_LOG_MIN];
- }
- }
-
- /* Pressure */
- if (usage == DIGITIZER_USAGE_TIP_PRESSURE) {
- if (device->maxpressure == 0) {
- device->maxpressure = globalval[TAG_GLOB_LOG_MAX];
- device->minpressure = globalval[TAG_GLOB_LOG_MIN];
- }
- }
-
- break;
- }
-
- inputnum++;
- break;
-
- case TAG_MAIN_OUTPUT:
- maintype = 'O';
- break;
-
- case TAG_MAIN_FEATURE:
- maintype = 'F';
- break;
-
- case TAG_MAIN_COL_START:
- maintype = 'S';
-
- if (indent == MAX_COLLECTION_LEVELS) {
- dev_err(ddev, "Collection level %d would exceed limit of %d\n",
- indent + 1,
- MAX_COLLECTION_LEVELS);
- break;
- }
-
- if (data == 0) {
- dev_dbg(ddev, "======>>>>>> Physical\n");
- strcpy(globtype, "Physical");
- } else
- dev_dbg(ddev, "======>>>>>>\n");
-
- /* Indent the debug output */
- indent++;
- for (x = 0; x < indent; x++)
- indentstr[x] = '-';
- indentstr[x] = 0;
-
- /* Save global tags */
- for (x = 0; x < TAG_GLOB_MAX; x++)
- oldval[x] = globalval[x];
-
- break;
-
- case TAG_MAIN_COL_END:
- maintype = 'E';
-
- if (indent == 0) {
- dev_err(ddev, "Collection level already at zero\n");
- break;
- }
-
- dev_dbg(ddev, "<<<<<<======\n");
-
- indent--;
- for (x = 0; x < indent; x++)
- indentstr[x] = '-';
- indentstr[x] = 0;
-
- /* Copy global tags back */
- for (x = 0; x < TAG_GLOB_MAX; x++)
- globalval[x] = oldval[x];
-
- break;
- }
-
- switch (size) {
- case 1:
- dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n",
- indentstr, tag, maintype, size, globtype, data);
- break;
-
- case 2:
- dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n",
- indentstr, tag, maintype, size, globtype, data16);
- break;
-
- case 4:
- dev_dbg(ddev, "%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x\n",
- indentstr, tag, maintype, size, globtype, data32);
- break;
- }
- break;
-
- case TYPE_GLOBAL:
- switch (tag) {
- case TAG_GLOB_USAGE:
- /*
- * First time we hit the global usage tag,
- * it should tell us the type of device
- */
- if (device->usage == 0)
- device->usage = data;
-
- strcpy(globtype, "USAGE");
- break;
-
- case TAG_GLOB_LOG_MIN:
- strcpy(globtype, "LOG_MIN");
- break;
-
- case TAG_GLOB_LOG_MAX:
- strcpy(globtype, "LOG_MAX");
- break;
-
- case TAG_GLOB_PHYS_MIN:
- strcpy(globtype, "PHYS_MIN");
- break;
-
- case TAG_GLOB_PHYS_MAX:
- strcpy(globtype, "PHYS_MAX");
- break;
-
- case TAG_GLOB_UNIT_EXP:
- strcpy(globtype, "EXP");
- break;
-
- case TAG_GLOB_UNIT:
- strcpy(globtype, "UNIT");
- break;
-
- case TAG_GLOB_REPORT_SZ:
- strcpy(globtype, "REPORT_SZ");
- break;
-
- case TAG_GLOB_REPORT_ID:
- strcpy(globtype, "REPORT_ID");
- /* New report, restart numbering */
- inputnum = 0;
- break;
-
- case TAG_GLOB_REPORT_CNT:
- strcpy(globtype, "REPORT_CNT");
- break;
-
- case TAG_GLOB_PUSH:
- strcpy(globtype, "PUSH");
- break;
-
- case TAG_GLOB_POP:
- strcpy(globtype, "POP");
- break;
- }
-
- /* Check to make sure we have a good tag number
- so we don't overflow array */
- if (tag < TAG_GLOB_MAX) {
- switch (size) {
- case 1:
- dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n",
- indentstr, globtype, tag, size, data);
- globalval[tag] = data;
- break;
-
- case 2:
- dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n",
- indentstr, globtype, tag, size, data16);
- globalval[tag] = data16;
- break;
-
- case 4:
- dev_dbg(ddev, "%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x\n",
- indentstr, globtype, tag, size, data32);
- globalval[tag] = data32;
- break;
- }
- } else {
- dev_dbg(ddev, "%sGLOBALTAG: ILLEGAL TAG:%d SIZE: %d\n",
- indentstr, tag, size);
- }
- break;
-
- case TYPE_LOCAL:
- switch (tag) {
- case TAG_GLOB_USAGE:
- strcpy(globtype, "USAGE");
- /* Always 1 byte */
- usage = data;
- break;
-
- case TAG_GLOB_LOG_MIN:
- strcpy(globtype, "MIN");
- break;
-
- case TAG_GLOB_LOG_MAX:
- strcpy(globtype, "MAX");
- break;
-
- default:
- strcpy(globtype, "UNKNOWN");
- break;
- }
-
- switch (size) {
- case 1:
- dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n",
- indentstr, tag, globtype, size, data);
- break;
-
- case 2:
- dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n",
- indentstr, tag, globtype, size, data16);
- break;
-
- case 4:
- dev_dbg(ddev, "%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x\n",
- indentstr, tag, globtype, size, data32);
- break;
- }
-
- break;
- }
- }
-}
-
-/* INPUT DRIVER Routines */
-
-/*
- * Called when opening the input device. This will submit the URB to
- * the usb system so we start getting reports
- */
-static int gtco_input_open(struct input_dev *inputdev)
-{
- struct gtco *device = input_get_drvdata(inputdev);
-
- device->urbinfo->dev = interface_to_usbdev(device->intf);
- if (usb_submit_urb(device->urbinfo, GFP_KERNEL))
- return -EIO;
-
- return 0;
-}
-
-/*
- * Called when closing the input device. This will unlink the URB
- */
-static void gtco_input_close(struct input_dev *inputdev)
-{
- struct gtco *device = input_get_drvdata(inputdev);
-
- usb_kill_urb(device->urbinfo);
-}
-
-
-/*
- * Setup input device capabilities. Tell the input system what this
- * device is capable of generating.
- *
- * This information is based on what is read from the HID report and
- * placed in the struct gtco structure
- *
- */
-static void gtco_setup_caps(struct input_dev *inputdev)
-{
- struct gtco *device = input_get_drvdata(inputdev);
-
- /* Which events */
- inputdev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) |
- BIT_MASK(EV_MSC);
-
- /* Misc event menu block */
- inputdev->mscbit[0] = BIT_MASK(MSC_SCAN) | BIT_MASK(MSC_SERIAL) |
- BIT_MASK(MSC_RAW);
-
- /* Absolute values based on HID report info */
- input_set_abs_params(inputdev, ABS_X, device->min_X, device->max_X,
- 0, 0);
- input_set_abs_params(inputdev, ABS_Y, device->min_Y, device->max_Y,
- 0, 0);
-
- /* Proximity */
- input_set_abs_params(inputdev, ABS_DISTANCE, 0, 1, 0, 0);
-
- /* Tilt & pressure */
- input_set_abs_params(inputdev, ABS_TILT_X, device->mintilt_X,
- device->maxtilt_X, 0, 0);
- input_set_abs_params(inputdev, ABS_TILT_Y, device->mintilt_Y,
- device->maxtilt_Y, 0, 0);
- input_set_abs_params(inputdev, ABS_PRESSURE, device->minpressure,
- device->maxpressure, 0, 0);
-
- /* Transducer */
- input_set_abs_params(inputdev, ABS_MISC, 0, 0xFF, 0, 0);
-}
-
-/* USB Routines */
-
-/*
- * URB callback routine. Called when we get IRQ reports from the
- * digitizer.
- *
- * This bridges the USB and input device worlds. It generates events
- * on the input device based on the USB reports.
- */
-static void gtco_urb_callback(struct urb *urbinfo)
-{
- struct gtco *device = urbinfo->context;
- struct input_dev *inputdev;
- int rc;
- u32 val = 0;
- char le_buffer[2];
-
- inputdev = device->inputdevice;
-
- /* Was callback OK? */
- if (urbinfo->status == -ECONNRESET ||
- urbinfo->status == -ENOENT ||
- urbinfo->status == -ESHUTDOWN) {
-
- /* Shutdown is occurring. Return and don't queue up any more */
- return;
- }
-
- if (urbinfo->status != 0) {
- /*
- * Some unknown error. Hopefully temporary. Just go and
- * requeue an URB
- */
- goto resubmit;
- }
-
- /*
- * Good URB, now process
- */
-
- /* PID dependent when we interpret the report */
- if (inputdev->id.product == PID_1000 ||
- inputdev->id.product == PID_1001 ||
- inputdev->id.product == PID_1002) {
-
- /*
- * Switch on the report ID
- * Conveniently, the reports have more information, the higher
- * the report number. We can just fall through the case
- * statements if we start with the highest number report
- */
- switch (device->buffer[0]) {
- case 5:
- /* Pressure is 9 bits */
- val = ((u16)(device->buffer[8]) << 1);
- val |= (u16)(device->buffer[7] >> 7);
- input_report_abs(inputdev, ABS_PRESSURE,
- device->buffer[8]);
-
- /* Mask out the Y tilt value used for pressure */
- device->buffer[7] = (u8)((device->buffer[7]) & 0x7F);
- fallthrough;
-
- case 4:
- /* Tilt */
- input_report_abs(inputdev, ABS_TILT_X,
- sign_extend32(device->buffer[6], 6));
-
- input_report_abs(inputdev, ABS_TILT_Y,
- sign_extend32(device->buffer[7], 6));
- fallthrough;
-
- case 2:
- case 3:
- /* Convert buttons, only 5 bits possible */
- val = (device->buffer[5]) & MASK_BUTTON;
-
- /* We don't apply any meaning to the bitmask,
- just report */
- input_event(inputdev, EV_MSC, MSC_SERIAL, val);
- fallthrough;
-
- case 1:
- /* All reports have X and Y coords in the same place */
- val = get_unaligned_le16(&device->buffer[1]);
- input_report_abs(inputdev, ABS_X, val);
-
- val = get_unaligned_le16(&device->buffer[3]);
- input_report_abs(inputdev, ABS_Y, val);
-
- /* Ditto for proximity bit */
- val = device->buffer[5] & MASK_INRANGE ? 1 : 0;
- input_report_abs(inputdev, ABS_DISTANCE, val);
-
- /* Report 1 is an exception to how we handle buttons */
- /* Buttons are an index, not a bitmask */
- if (device->buffer[0] == 1) {
-
- /*
- * Convert buttons, 5 bit index
- * Report value of index set as one,
- * the rest as 0
- */
- val = device->buffer[5] & MASK_BUTTON;
- dev_dbg(&device->intf->dev,
- "======>>>>>>REPORT 1: val 0x%X(%d)\n",
- val, val);
-
- /*
- * We don't apply any meaning to the button
- * index, just report it
- */
- input_event(inputdev, EV_MSC, MSC_SERIAL, val);
- }
- break;
-
- case 7:
- /* Menu blocks */
- input_event(inputdev, EV_MSC, MSC_SCAN,
- device->buffer[1]);
- break;
- }
- }
-
- /* Other pid class */
- if (inputdev->id.product == PID_400 ||
- inputdev->id.product == PID_401) {
-
- /* Report 2 */
- if (device->buffer[0] == 2) {
- /* Menu blocks */
- input_event(inputdev, EV_MSC, MSC_SCAN, device->buffer[1]);
- }
-
- /* Report 1 */
- if (device->buffer[0] == 1) {
- char buttonbyte;
-
- /* IF X max > 64K, we still a bit from the y report */
- if (device->max_X > 0x10000) {
-
- val = (u16)(((u16)(device->buffer[2] << 8)) | (u8)device->buffer[1]);
- val |= (u32)(((u8)device->buffer[3] & 0x1) << 16);
-
- input_report_abs(inputdev, ABS_X, val);
-
- le_buffer[0] = (u8)((u8)(device->buffer[3]) >> 1);
- le_buffer[0] |= (u8)((device->buffer[3] & 0x1) << 7);
-
- le_buffer[1] = (u8)(device->buffer[4] >> 1);
- le_buffer[1] |= (u8)((device->buffer[5] & 0x1) << 7);
-
- val = get_unaligned_le16(le_buffer);
- input_report_abs(inputdev, ABS_Y, val);
-
- /*
- * Shift the button byte right by one to
- * make it look like the standard report
- */
- buttonbyte = device->buffer[5] >> 1;
- } else {
-
- val = get_unaligned_le16(&device->buffer[1]);
- input_report_abs(inputdev, ABS_X, val);
-
- val = get_unaligned_le16(&device->buffer[3]);
- input_report_abs(inputdev, ABS_Y, val);
-
- buttonbyte = device->buffer[5];
- }
-
- /* BUTTONS and PROXIMITY */
- val = buttonbyte & MASK_INRANGE ? 1 : 0;
- input_report_abs(inputdev, ABS_DISTANCE, val);
-
- /* Convert buttons, only 4 bits possible */
- val = buttonbyte & 0x0F;
-#ifdef USE_BUTTONS
- for (i = 0; i < 5; i++)
- input_report_key(inputdev, BTN_DIGI + i, val & (1 << i));
-#else
- /* We don't apply any meaning to the bitmask, just report */
- input_event(inputdev, EV_MSC, MSC_SERIAL, val);
-#endif
-
- /* TRANSDUCER */
- input_report_abs(inputdev, ABS_MISC, device->buffer[6]);
- }
- }
-
- /* Everybody gets report ID's */
- input_event(inputdev, EV_MSC, MSC_RAW, device->buffer[0]);
-
- /* Sync it up */
- input_sync(inputdev);
-
- resubmit:
- rc = usb_submit_urb(urbinfo, GFP_ATOMIC);
- if (rc != 0)
- dev_err(&device->intf->dev,
- "usb_submit_urb failed rc=0x%x\n", rc);
-}
-
-/*
- * The probe routine. This is called when the kernel find the matching USB
- * vendor/product. We do the following:
- *
- * - Allocate mem for a local structure to manage the device
- * - Request a HID Report Descriptor from the device and parse it to
- * find out the device parameters
- * - Create an input device and assign it attributes
- * - Allocate an URB so the device can talk to us when the input
- * queue is open
- */
-static int gtco_probe(struct usb_interface *usbinterface,
- const struct usb_device_id *id)
-{
-
- struct gtco *gtco;
- struct input_dev *input_dev;
- struct hid_descriptor *hid_desc;
- char *report;
- int result = 0, retry;
- int error;
- struct usb_endpoint_descriptor *endpoint;
- struct usb_device *udev = interface_to_usbdev(usbinterface);
-
- /* Allocate memory for device structure */
- gtco = kzalloc(sizeof(struct gtco), GFP_KERNEL);
- input_dev = input_allocate_device();
- if (!gtco || !input_dev) {
- dev_err(&usbinterface->dev, "No more memory\n");
- error = -ENOMEM;
- goto err_free_devs;
- }
-
- /* Set pointer to the input device */
- gtco->inputdevice = input_dev;
-
- /* Save interface information */
- gtco->intf = usbinterface;
-
- /* Allocate some data for incoming reports */
- gtco->buffer = usb_alloc_coherent(udev, REPORT_MAX_SIZE,
- GFP_KERNEL, >co->buf_dma);
- if (!gtco->buffer) {
- dev_err(&usbinterface->dev, "No more memory for us buffers\n");
- error = -ENOMEM;
- goto err_free_devs;
- }
-
- /* Allocate URB for reports */
- gtco->urbinfo = usb_alloc_urb(0, GFP_KERNEL);
- if (!gtco->urbinfo) {
- dev_err(&usbinterface->dev, "Failed to allocate URB\n");
- error = -ENOMEM;
- goto err_free_buf;
- }
-
- /* Sanity check that a device has an endpoint */
- if (usbinterface->cur_altsetting->desc.bNumEndpoints < 1) {
- dev_err(&usbinterface->dev,
- "Invalid number of endpoints\n");
- error = -EINVAL;
- goto err_free_urb;
- }
-
- endpoint = &usbinterface->cur_altsetting->endpoint[0].desc;
-
- /* Some debug */
- dev_dbg(&usbinterface->dev, "gtco # interfaces: %d\n", usbinterface->num_altsetting);
- dev_dbg(&usbinterface->dev, "num endpoints: %d\n", usbinterface->cur_altsetting->desc.bNumEndpoints);
- dev_dbg(&usbinterface->dev, "interface class: %d\n", usbinterface->cur_altsetting->desc.bInterfaceClass);
- dev_dbg(&usbinterface->dev, "endpoint: attribute:0x%x type:0x%x\n", endpoint->bmAttributes, endpoint->bDescriptorType);
- if (usb_endpoint_xfer_int(endpoint))
- dev_dbg(&usbinterface->dev, "endpoint: we have interrupt endpoint\n");
-
- dev_dbg(&usbinterface->dev, "interface extra len:%d\n",
- usbinterface->cur_altsetting->extralen);
-
- /*
- * Find the HID descriptor so we can find out the size of the
- * HID report descriptor
- */
- if (usb_get_extra_descriptor(usbinterface->cur_altsetting,
- HID_DEVICE_TYPE, &hid_desc) != 0) {
- dev_err(&usbinterface->dev,
- "Can't retrieve exta USB descriptor to get hid report descriptor length\n");
- error = -EIO;
- goto err_free_urb;
- }
-
- dev_dbg(&usbinterface->dev,
- "Extra descriptor success: type:%d len:%d\n",
- hid_desc->bDescriptorType, hid_desc->wDescriptorLength);
-
- report = kzalloc(le16_to_cpu(hid_desc->wDescriptorLength), GFP_KERNEL);
- if (!report) {
- dev_err(&usbinterface->dev, "No more memory for report\n");
- error = -ENOMEM;
- goto err_free_urb;
- }
-
- /* Couple of tries to get reply */
- for (retry = 0; retry < 3; retry++) {
- result = usb_control_msg(udev,
- usb_rcvctrlpipe(udev, 0),
- USB_REQ_GET_DESCRIPTOR,
- USB_RECIP_INTERFACE | USB_DIR_IN,
- REPORT_DEVICE_TYPE << 8,
- 0, /* interface */
- report,
- le16_to_cpu(hid_desc->wDescriptorLength),
- 5000); /* 5 secs */
-
- dev_dbg(&usbinterface->dev, "usb_control_msg result: %d\n", result);
- if (result == le16_to_cpu(hid_desc->wDescriptorLength)) {
- parse_hid_report_descriptor(gtco, report, result);
- break;
- }
- }
-
- kfree(report);
-
- /* If we didn't get the report, fail */
- if (result != le16_to_cpu(hid_desc->wDescriptorLength)) {
- dev_err(&usbinterface->dev,
- "Failed to get HID Report Descriptor of size: %d\n",
- hid_desc->wDescriptorLength);
- error = -EIO;
- goto err_free_urb;
- }
-
- /* Create a device file node */
- usb_make_path(udev, gtco->usbpath, sizeof(gtco->usbpath));
- strlcat(gtco->usbpath, "/input0", sizeof(gtco->usbpath));
-
- /* Set Input device functions */
- input_dev->open = gtco_input_open;
- input_dev->close = gtco_input_close;
-
- /* Set input device information */
- input_dev->name = "GTCO_CalComp";
- input_dev->phys = gtco->usbpath;
-
- input_set_drvdata(input_dev, gtco);
-
- /* Now set up all the input device capabilities */
- gtco_setup_caps(input_dev);
-
- /* Set input device required ID information */
- usb_to_input_id(udev, &input_dev->id);
- input_dev->dev.parent = &usbinterface->dev;
-
- /* Setup the URB, it will be posted later on open of input device */
- usb_fill_int_urb(gtco->urbinfo,
- udev,
- usb_rcvintpipe(udev,
- endpoint->bEndpointAddress),
- gtco->buffer,
- REPORT_MAX_SIZE,
- gtco_urb_callback,
- gtco,
- endpoint->bInterval);
-
- gtco->urbinfo->transfer_dma = gtco->buf_dma;
- gtco->urbinfo->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
-
- /* Save gtco pointer in USB interface gtco */
- usb_set_intfdata(usbinterface, gtco);
-
- /* All done, now register the input device */
- error = input_register_device(input_dev);
- if (error)
- goto err_free_urb;
-
- return 0;
-
- err_free_urb:
- usb_free_urb(gtco->urbinfo);
- err_free_buf:
- usb_free_coherent(udev, REPORT_MAX_SIZE,
- gtco->buffer, gtco->buf_dma);
- err_free_devs:
- input_free_device(input_dev);
- kfree(gtco);
- return error;
-}
-
-/*
- * This function is a standard USB function called when the USB device
- * is disconnected. We will get rid of the URV, de-register the input
- * device, and free up allocated memory
- */
-static void gtco_disconnect(struct usb_interface *interface)
-{
- /* Grab private device ptr */
- struct gtco *gtco = usb_get_intfdata(interface);
- struct usb_device *udev = interface_to_usbdev(interface);
-
- /* Now reverse all the registration stuff */
- if (gtco) {
- input_unregister_device(gtco->inputdevice);
- usb_kill_urb(gtco->urbinfo);
- usb_free_urb(gtco->urbinfo);
- usb_free_coherent(udev, REPORT_MAX_SIZE,
- gtco->buffer, gtco->buf_dma);
- kfree(gtco);
- }
-
- dev_info(&interface->dev, "gtco driver disconnected\n");
-}
-
-/* STANDARD MODULE LOAD ROUTINES */
-
-static struct usb_driver gtco_driverinfo_table = {
- .name = "gtco",
- .id_table = gtco_usbid_table,
- .probe = gtco_probe,
- .disconnect = gtco_disconnect,
-};
-
-module_usb_driver(gtco_driverinfo_table);
-
-MODULE_DESCRIPTION("GTCO digitizer USB driver");
-MODULE_LICENSE("GPL");
projects / linux.git / commitdiff