From: Jeremy Roberson <[EMAIL PROTECTED]>
Added a kernel module (gtco) to the USB Input subsystem. This kernel
module adds support for all GTCO CalComp USB InterWrite School products.
Signed-off-by: Jeremy A. Roberson <[EMAIL PROTECTED]>
---
diff -uprN a/drivers/usb/input/gtco.c b/drivers/usb/input/gtco.c
--- a/drivers/usb/input/gtco.c 1969-12-31 17:00:00.000000000 -0700
+++ b/drivers/usb/input/gtco.c 2006-10-08 22:09:02.000000000 -0700
@@ -0,0 +1,1164 @@
+/*
[EMAIL PROTECTED] gtco.c
+
+GTCO digitizer USB driver
+
+Use the err(), dbg() and info() macros from usb.h for system logging
+
+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; 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., 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 [EMAIL PROTECTED]
+Scott Hill [EMAIL PROTECTED]
+*/
+
+
+
+//#define DEBUG
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+#include <asm/byteorder.h>
+
+
+#include <linux/version.h>
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,14))
+/** This define is for kernels 2.6.15 and up where the input driver
+ * interface has changed
+ */
+#define USE_INPUT_ALLOCATE
+#include <linux/usb_input.h>
+#endif
+
+
+#ifdef USE_INPUT_ALLOCATE
+#include <linux/usb_input.h>
+#endif
+
+#define GTCO_VERSION "1.00.0005"
+
+/**********************************************************************
*******/
+// 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
+
+
+// Bitmask whether pen is in range
+#define MASK_INRANGE 0x20
+#define MASK_BUTTON 0x01F
+
+#define PATHLENGTH 64
+
+/**
+ In kernel 2.6.15+ the input device must be explicitedly allocated,
+ not part of our own structure. We use this macro to get the pointer
+ to the input device from our structure, which is allocated
+ differently depending on the kernel version
+*/
+#ifdef USE_INPUT_ALLOCATE
+#define GET_INPUT_DEV_PTR(x) (x)->pInputDev
+#define FREE_INPUT_DEV(x) input_free_device((x)->pInputDev);
+#else
+#define GET_INPUT_DEV_PTR(x) &((x)->inputDev)
+#define FREE_INPUT_DEV(x)
+#endif
+
+
+
+/**********************************************************************
*******/
+// DATA STRUCTURES
+/**********************************************************************
*******/
+
+// Device table
+static 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 */
+typedef struct gtco_dev {
+
+#ifdef USE_INPUT_ALLOCATE
+ struct input_dev *pInputDev; /**< input device struct pointer
*/
+#else
+ struct input_dev inputDev; /**< input device struct */
+#endif
+
+ struct usb_device *pUSBdev; /**< the usb device for this device */
+ struct urb *pUrb; /**< 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;
+
+
+} GTCO_DEVICE_T;
+
+
+
+/**********************************************************************
*******/
+// 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 save 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(GTCO_DEVICE_T *apDevice, char *
apReport, int aSize)
+{
+ 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 globalValue[TAG_GLOB_MAX];
+ __u32 oldValue[TAG_GLOB_MAX];
+
+ // Debug stuff
+ char mainType='x';
+ char gType[12];
+ int indent=0;
+ char indentstr[10]="";
+
+
+
+ dbg("======>>>>>>PARSE<<<<<<======");
+
+ // Walk this report and pull out the info we need
+ while (i<aSize){
+ prefix=apReport[i];
+
+ // Skip over prefix
+ i++;
+
+ // Determine data size and save the data in the proper variable
+ size = PREF_SIZE(prefix);
+ switch(size){
+ case 1:
+ data = apReport[i];
+ break;
+ case 2:
+ data16 =
le16_to_cpu(get_unaligned((__le16*)(&(apReport[i]))));
+ break;
+ case 3:
+ size = 4;
+ data32 =
le32_to_cpu(get_unaligned((__le32*)(&(apReport[i]))));
+ }
+
+ // 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(gType,"");
+ 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(gType,"Variable");
+ }
+ if (data==3){
+ strcpy(gType,"Var|Const");
+ }
+
+ dbg("::::: Saving Report: %d input #%d Max: 0x%X(%d)
Min:0x%X(%d) of %d bits",
+ globalValue[TAG_GLOB_REPORT_ID],inputNum,
+
globalValue[TAG_GLOB_LOG_MAX],globalValue[TAG_GLOB_LOG_MAX],
+
globalValue[TAG_GLOB_LOG_MIN],globalValue[TAG_GLOB_LOG_MIN],
+ (globalValue[TAG_GLOB_REPORT_SZ] *
globalValue[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
+ dbg("GER: X Usage: 0x%x",usage);
+ if (apDevice->max_X == 0){
+ apDevice->max_X = globalValue[TAG_GLOB_LOG_MAX];
+ apDevice->min_X = globalValue[TAG_GLOB_LOG_MIN];
+ }
+
+ break;
+ case 1: // Y coord
+ dbg("GER: Y Usage: 0x%x",usage);
+ if (apDevice->max_Y == 0){
+ apDevice->max_Y = globalValue[TAG_GLOB_LOG_MAX];
+ apDevice->min_Y = globalValue[TAG_GLOB_LOG_MIN];
+ }
+ break;
+ default:
+ // Tilt X
+ if (usage == DIGITIZER_USAGE_TILT_X){
+ if (apDevice->maxTilt_X == 0){
+ apDevice->maxTilt_X =
globalValue[TAG_GLOB_LOG_MAX];
+ apDevice->minTilt_X =
globalValue[TAG_GLOB_LOG_MIN];
+ }
+ }
+
+ // Tilt Y
+ if (usage == DIGITIZER_USAGE_TILT_Y){
+ if (apDevice->maxTilt_Y == 0){
+ apDevice->maxTilt_Y =
globalValue[TAG_GLOB_LOG_MAX];
+ apDevice->minTilt_Y =
globalValue[TAG_GLOB_LOG_MIN];
+ }
+ }
+
+
+ // Pressure
+ if (usage == DIGITIZER_USAGE_TIP_PRESSURE){
+ if (apDevice->maxPressure == 0){
+ apDevice->maxPressure =
globalValue[TAG_GLOB_LOG_MAX];
+ apDevice->minPressure =
globalValue[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 (data==0){
+ dbg("======>>>>>> Physical");
+ strcpy(gType,"Physical");
+ }else{
+ dbg("======>>>>>>");
+ }
+
+ // 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++){
+ oldValue[x] = globalValue[x];
+ }
+
+ break;
+ case TAG_MAIN_COL_END:
+ dbg("<<<<<<======");
+ mainType='E';
+ indent--;
+ for (x=0;x<indent;x++){
+ indentstr[x]='-';
+ }
+ indentstr[x]=0;
+
+ // Copy global tags back
+ for (x=0;x<TAG_GLOB_MAX;x++){
+ globalValue[x] = oldValue[x];
+ }
+
+ break;
+ }
+
+ switch (size){
+ case 1:
+ dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s
0x%x",indentstr,tag,mainType,size,gType,data);
+ break;
+ case 2:
+ dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s
0x%x",indentstr,tag,mainType,size,gType, data16);
+ break;
+ case 4:
+ dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s
0x%x",indentstr,tag,mainType,size,gType,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 (apDevice->usage == 0){
+ apDevice->usage = data;
+ }
+ strcpy(gType,"USAGE");
+ break;
+ case TAG_GLOB_LOG_MIN :
+ strcpy(gType,"LOG_MIN");
+ break;
+ case TAG_GLOB_LOG_MAX :
+ strcpy(gType,"LOG_MAX");
+ break;
+ case TAG_GLOB_PHYS_MIN :
+ strcpy(gType,"PHYS_MIN");
+ break;
+ case TAG_GLOB_PHYS_MAX :
+ strcpy(gType,"PHYS_MAX");
+ break;
+ case TAG_GLOB_UNIT_EXP :
+ strcpy(gType,"EXP");
+ break;
+ case TAG_GLOB_UNIT :
+ strcpy(gType,"UNIT");
+ break;
+ case TAG_GLOB_REPORT_SZ :
+ strcpy(gType,"REPORT_SZ");
+ break;
+ case TAG_GLOB_REPORT_ID :
+ strcpy(gType,"REPORT_ID");
+ // New report, restart numbering
+ inputNum=0;
+ break;
+ case TAG_GLOB_REPORT_CNT:
+ strcpy(gType,"REPORT_CNT");
+ break;
+ case TAG_GLOB_PUSH :
+ strcpy(gType,"PUSH");
+ break;
+ case TAG_GLOB_POP:
+ strcpy(gType,"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:
+ dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data:
0x%x",indentstr,gType,tag,size,data);
+ globalValue[tag]=data;
+ break;
+ case 2:
+ dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data:
0x%x",indentstr,gType,tag,size,data16);
+ globalValue[tag]=data16;
+ break;
+ case 4:
+ dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data:
0x%x",indentstr,gType,tag,size,data32);
+ globalValue[tag]=data32;
+ break;
+ }
+ }else{
+ dbg("%sGLOBALTAG: ILLEGAL TAG:%d SIZE: %d
",indentstr,tag,size);
+ }
+
+
+ break;
+
+ case TYPE_LOCAL:
+ switch(tag){
+ case TAG_GLOB_USAGE:
+ strcpy(gType,"USAGE");
+ // Always 1 byte
+ usage = data;
+ break;
+ case TAG_GLOB_LOG_MIN :
+ strcpy(gType,"MIN");
+ break;
+ case TAG_GLOB_LOG_MAX :
+ strcpy(gType,"MAX");
+ break;
+ default:
+ strcpy(gType,"UNKNOWN");
+ }
+
+ switch (size){
+ case 1:
+ dbg("%sLOCALTAG:(%d) %s SIZE: %d Data:
0x%x",indentstr,tag,gType,size,data);
+ break;
+ case 2:
+ dbg("%sLOCALTAG:(%d) %s SIZE: %d Data:
0x%x",indentstr,tag,gType,size,data16);
+ break;
+ case 4:
+ dbg("%sLOCALTAG:(%d) %s SIZE: %d Data:
0x%x",indentstr,tag,gType,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_InputOpen(struct input_dev *inputdev)
+{
+ struct gtco_dev *pDevice;
+ pDevice = inputdev->private;
+
+ // Prevent us from submitting the one Urb more than once
+ if (pDevice->openCount++)
+ return 0;
+
+ pDevice->pUrb->dev = pDevice->pUSBdev;
+ if (usb_submit_urb(pDevice->pUrb, GFP_KERNEL)) {
+ pDevice->openCount--;
+ return -EIO;
+ }
+ return 0;
+}
+
+/**
+ Called when closing the input device. This will unlink the URB
+*/
+static void GTCO_InputClose(struct input_dev *apDev)
+{
+ GTCO_DEVICE_T *pDevice = apDev->private;
+
+ // Decrement the open count and release the urb
+ pDevice->openCount--;
+ if (pDevice->openCount==0){
+ usb_unlink_urb(pDevice->pUrb);
+ }
+}
+
+
+/**
+ 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 GTCO_DEVICE_T structure
+
[EMAIL PROTECTED] apInputDev pointer to input device
+*/
+static void GTCO_SetupInputCaps(struct input_dev *apInputDev)
+{
+ GTCO_DEVICE_T *pDevice = apInputDev->private;
+ u16 pid = pDevice->pUSBdev->descriptor.idProduct;
+ int i;
+
+
+ // Which events
+ apInputDev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
+
+
+ // Misc event menu block
+ apInputDev->mscbit[0] = BIT(MSC_SCAN)|BIT(MSC_SERIAL)|BIT(MSC_RAW) ;
+
+#ifdef USE_BUTTONS
+
+ // Buttons
+ // Set for the 16 digitizer buttons starting at TOOL_PEN
+ for (i=0;i<16;i++){
+ apInputDev->keybit[LONG(BTN_DIGI)] |= BIT((BTN_TOOL_PEN+i))
;
+ }
+#endif
+
+ // Absolute values based on HID report info
+ input_set_abs_params(apInputDev, ABS_X, pDevice->min_X,
pDevice->max_X, 0, 0);
+ input_set_abs_params(apInputDev, ABS_Y, pDevice->min_Y,
pDevice->max_Y, 0, 0);
+
+ // Proximity
+ input_set_abs_params(apInputDev, ABS_DISTANCE, 0, 1, 0, 0);
+
+ // Tilt & pressure
+ input_set_abs_params(apInputDev, ABS_TILT_X, pDevice->minTilt_X,
pDevice->maxTilt_X, 0, 0);
+ input_set_abs_params(apInputDev, ABS_TILT_Y, pDevice->minTilt_Y,
pDevice->maxTilt_Y, 0, 0);
+ input_set_abs_params(apInputDev, ABS_PRESSURE, pDevice->minPressure,
pDevice->maxPressure, 0, 0);
+
+
+ // Transducer
+ input_set_abs_params(apInputDev, 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 gtcoUrbCallback(struct urb *apUrb, struct pt_regs *apRegs)
+{
+
+
+ GTCO_DEVICE_T *pDevice = apUrb->context;
+ struct input_dev *pInput;
+ int rc,i;
+ u32 val = 0;
+ s8 valSigned = 0;
+ char le_buffer[2];
+
+ pInput = GET_INPUT_DEV_PTR(pDevice);
+
+
+ // Was callback OK?
+ if ((apUrb->status == -ECONNRESET ) ||
+ (apUrb->status == -ENOENT ) ||
+ (apUrb->status == -ESHUTDOWN )){
+
+ // Shutdown is occurring. Return and don't queue up any more
+ return;
+ }
+
+ if (apUrb->status != 0 ) {
+ // Some unknown error. Hopefully temporary. Just go and
+ // requeue an URB
+ goto resubmit;
+ }
+
+ //
+ // Good URB, now process
+ //
+ input_regs(pInput, apRegs);
+
+ // PID dependent when we interpret the report
+ if ((pInput->id.product == PID_1000 )||
+ (pInput->id.product == PID_1001 )||
+ (pInput->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(pDevice->buffer[0]){
+ case 5:
+ // Pressure is 9 bits
+ val = ((u16)(pDevice->buffer[8]) << 1);
+ val |= (u16)(pDevice->buffer[7] >> 7);
+ input_report_abs(pInput, ABS_PRESSURE, pDevice->buffer[8]);
+
+ // Mask out the Y tilt value used for pressure
+ pDevice->buffer[7] = (u8)((pDevice->buffer[7]) & 0x7F);
+
+
+ // Fall thru
+ case 4:
+ // Tilt
+
+ // Sign extend these 7 bit numbers.
+ if (pDevice->buffer[6] & 0x40)
+ pDevice->buffer[6] |= 0x80;
+
+ if (pDevice->buffer[7] & 0x40)
+ pDevice->buffer[7] |= 0x80;
+
+
+ valSigned = (pDevice->buffer[6]);
+ input_report_abs(pInput, ABS_TILT_X, (s32)valSigned);
+
+ valSigned = (pDevice->buffer[7]);
+ input_report_abs(pInput, ABS_TILT_Y, (s32)valSigned);
+
+ // Fall thru
+
+ case 2:
+ case 3:
+ // Convert buttons, only 5 bits possible
+ val = (pDevice->buffer[5])&MASK_BUTTON;
+#ifdef USE_BUTTONS
+ for ( i=0;i<5;i++){
+ input_report_key(pInput, BTN_DIGI+i,val&(1<<i));
+ }
+#else
+ // We don't apply any meaning to the bitmask, just report
+ input_event(pInput, EV_MSC, MSC_SERIAL, val);
+#endif
+ // Fall thru
+ case 1:
+
+ // All reports have X and Y coords in the same place
+ val = le16_to_cpu(*(__le16 *) &(pDevice->buffer[1]));
+ input_report_abs(pInput, ABS_X, val);
+
+ val = le16_to_cpu(*(__le16 *) &(pDevice->buffer[3]));
+ input_report_abs(pInput, ABS_Y, val);
+
+
+ // Ditto for proximity bit
+ if (pDevice->buffer[5]& MASK_INRANGE){
+ val = 1;
+ }else{
+ val=0;
+ }
+ input_report_abs(pInput, ABS_DISTANCE, val);
+
+
+ // Report 1 is an exception to how we handle buttons
+ // Buttons are an index, not a bitmask
+ if (pDevice->buffer[0] == 1){
+ int pressed=0;
+
+ // Convert buttons, 5 bit index
+ // Report value of index set as one, the rest as 0
+ val = pDevice->buffer[5]& MASK_BUTTON;
+ dbg("======>>>>>>REPORT 1: val 0x%X(%d)",val,val);
+
+#ifdef USE_BUTTONS
+ for ( i=0;i<16;i++){
+ pressed = 0;
+ // Is a button active
+ if (val != 0){
+ if (i==(val-1)){
+ pressed = 1;
+ dbg("======>>>>>>pressed 1: val (%d) i:%d",val,i);
+ }
+ }
+ input_report_key(pInput, BTN_DIGI+i,pressed);
+ }
+#else
+ // We don't apply any meaning to the button index, just report
+ // it
+ input_event(pInput, EV_MSC, MSC_SERIAL, val);
+#endif
+
+
+ }
+
+ break;
+ case 7:
+ // Menu blocks
+ input_event(pInput, EV_MSC, MSC_SCAN, pDevice->buffer[1]);
+
+
+ break;
+
+ }
+
+
+ }
+ // Other pid class
+ if ((pInput->id.product == PID_400 )||
+ (pInput->id.product == PID_401 ))
+ {
+
+ // Report 2
+ if (pDevice->buffer[0] == 2){
+ // Menu blocks
+ input_event(pInput, EV_MSC, MSC_SCAN, pDevice->buffer[1]);
+ }
+
+ // Report 1
+ if (pDevice->buffer[0] == 1){
+ char buttonbyte;
+
+
+ // IF X max > 64K, we still a bit from the y report
+ if (pDevice->max_X > 0x10000){
+
+ val =
(u16)(((u16)(pDevice->buffer[2]<<8))|((u8)(pDevice->buffer[1])));
+ val |= (u32)(((u8)pDevice->buffer[3]&0x1)<< 16);
+
+ input_report_abs(pInput, ABS_X, val);
+
+ le_buffer[0] = (u8)((u8)(pDevice->buffer[3])>>1);
+ le_buffer[0] |= (u8)((pDevice->buffer[3]&0x1)<<7);
+
+ le_buffer[1] = (u8)(pDevice->buffer[4]>>1);
+ le_buffer[1] |= (u8)((pDevice->buffer[5]&0x1)<<7);
+
+ val = le16_to_cpu(*(__le16 *)(le_buffer));
+
+ input_report_abs(pInput, ABS_Y, val);
+
+
+ // Shift the button byte right by one to make it look like
+ // the standard report
+ buttonbyte = (pDevice->buffer[5])>>1;
+ }else{
+
+ val = le16_to_cpu(*(__le16 *) (&(pDevice->buffer[1])));
+ input_report_abs(pInput, ABS_X, val);
+
+ val = le16_to_cpu(*(__le16 *) (&(pDevice->buffer[3])));
+ input_report_abs(pInput, ABS_Y, val);
+
+ buttonbyte = pDevice->buffer[5];
+
+ }
+
+
+ // BUTTONS and PROXIMITY
+ if (buttonbyte& MASK_INRANGE){
+ val = 1;
+ }else{
+ val=0;
+ }
+ input_report_abs(pInput, ABS_DISTANCE, val);
+
+ // Convert buttons, only 4 bits possible
+ val = buttonbyte&0x0F;
+#ifdef USE_BUTTONS
+ for ( i=0;i<5;i++){
+ input_report_key(pInput, BTN_DIGI+i,val&(1<<i));
+ }
+#else
+ // We don't apply any meaning to the bitmask, just report
+ input_event(pInput, EV_MSC, MSC_SERIAL, val);
+#endif
+ // TRANSDUCER
+ input_report_abs(pInput, ABS_MISC, pDevice->buffer[6]);
+
+ }
+ }
+
+ // Everybody gets report ID's
+ input_event(pInput, EV_MSC, MSC_RAW, pDevice->buffer[0]);
+
+ // Sync it up
+ input_sync(pInput);
+
+resubmit:
+ rc = usb_submit_urb(apUrb, GFP_ATOMIC);
+ if (rc != 0) {
+ err("usb_submit_urb failed rc=0x%x",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 *apInterface,
+ const struct usb_device_id *apID)
+{
+
+ GTCO_DEVICE_T *pDevice = NULL;
+ char path[PATHLENGTH];
+ struct input_dev *pInput;
+ struct hid_descriptor *pHIDdesc;
+ char *pReport;
+ int result=0, retry;
+ struct usb_endpoint_descriptor *endpoint;
+
+ // Allocate memory for device structure
+ pDevice = kmalloc(sizeof(GTCO_DEVICE_T), GFP_KERNEL);
+ if (pDevice == NULL) {
+ err("No more memory");
+ return -ENOMEM;
+ }
+ memset(pDevice, 0x00, sizeof (GTCO_DEVICE_T));
+
+#ifdef USE_INPUT_ALLOCATE
+
+ // New interface, we must allocate an input device, not declare one
+ // in our own data space
+ pDevice->pInputDev = input_allocate_device();
+ if (!pDevice->pInputDev){
+ kfree(pDevice);
+ err("No more memory");
+ return -ENOMEM;
+ }
+#endif
+ // Get pointer to the input device
+ pInput = GET_INPUT_DEV_PTR(pDevice);
+
+ // Save interface information
+ pDevice->pUSBdev =
usb_get_dev(interface_to_usbdev(apInterface));
+
+
+ // Allocate some data for incoming reports
+ pDevice->buffer = usb_buffer_alloc(pDevice->pUSBdev,
REPORT_MAX_SIZE,
+ SLAB_ATOMIC,
&(pDevice->buf_dma));
+ if (!pDevice->buffer){
+ FREE_INPUT_DEV(pDevice);
+ kfree(pDevice);
+ err("No more memory");
+ return -ENOMEM;
+ }
+
+ // Allocate URB for reports
+ pDevice->pUrb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!pDevice->pUrb) {
+ usb_buffer_free(pDevice->pUSBdev, REPORT_MAX_SIZE,
pDevice->buffer,
+ pDevice->buf_dma);
+ FREE_INPUT_DEV(pDevice);
+ kfree(pDevice);
+ err("No more memory");
+ return -ENOMEM;
+ }
+
+
+ // The endpoint is always altsetting 0, we know this since we know
+ // this device only has one interrupt endpoint
+ endpoint = &apInterface->altsetting[0].endpoint[0].desc;
+
+ // Some debug
+ dbg("gtco # interfaces: %d",apInterface->num_altsetting);
+ dbg("num endpoints:
%d",apInterface->cur_altsetting->desc.bNumEndpoints);
+ dbg("interface class:
%d",apInterface->cur_altsetting->desc.bInterfaceClass);
+ dbg("endpoint: attribute:0x%x
type:0x%x",endpoint->bmAttributes,endpoint->bDescriptorType);
+ if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_INT)
+ dbg("endpoint: we have interrupt endpoint\n");
+
+ dbg("endpoint extra len:%d ",apInterface->altsetting[0].extralen);
+
+
+
+ // Find the HID descriptor so we can find out the size of the
+ // HID report descriptor
+ if (usb_get_extra_descriptor(apInterface->cur_altsetting,
HID_DEVICE_TYPE,&pHIDdesc) != 0){
+ err("Can't retrieve exta USB descriptor to get hid
report descriptor length");
+ usb_buffer_free(pDevice->pUSBdev, REPORT_MAX_SIZE,
pDevice->buffer,
+ pDevice->buf_dma);
+ FREE_INPUT_DEV(pDevice);
+ kfree(pDevice);
+ return -EIO;
+ }
+
+ dbg("Extra descriptor success: type:%d len:%d",
pHIDdesc->bDescriptorType,
+ pHIDdesc->wDescriptorLength);
+
+ if (!(pReport = kmalloc(pHIDdesc->wDescriptorLength,
GFP_KERNEL))) {
+ usb_buffer_free(pDevice->pUSBdev, REPORT_MAX_SIZE,
pDevice->buffer,
+ pDevice->buf_dma);
+
+ FREE_INPUT_DEV(pDevice);
+ kfree(pDevice);
+ err("No more memory");
+ return -ENOMEM;
+ }
+ memset(pReport,0,pHIDdesc->wDescriptorLength);
+
+ // Couple of tries to get reply
+ for (retry=0;retry<3;retry++) {
+ result = usb_control_msg(pDevice->pUSBdev,
+ usb_rcvctrlpipe(pDevice->pUSBdev, 0),
+ USB_REQ_GET_DESCRIPTOR,
USB_RECIP_INTERFACE | USB_DIR_IN,
+ (REPORT_DEVICE_TYPE << 8),
+ 0, // interface
+ pReport,
+ pHIDdesc->wDescriptorLength,
+ 5000); // 5 secs
+
+ if (result == pHIDdesc->wDescriptorLength)
+ break;
+ }
+
+ // If we didn't get the report, fail
+ dbg("usb_control_msg result: :%d", result);
+ if (result != pHIDdesc->wDescriptorLength){
+ kfree(pReport);
+ usb_buffer_free(pDevice->pUSBdev, REPORT_MAX_SIZE,
pDevice->buffer,
+ pDevice->buf_dma);
+ FREE_INPUT_DEV(pDevice);
+ kfree(pDevice);
+ err("Failed to get HID Report Descriptor of size:
%d",pHIDdesc->wDescriptorLength);
+ return -EIO;
+ }
+
+
+ // Now we parse the report
+ parse_hid_report_descriptor(pDevice,pReport,result);
+
+ // Now we delete it
+ kfree(pReport);
+
+ // Create a device file node
+ usb_make_path(pDevice->pUSBdev, path, PATHLENGTH);
+ sprintf(pDevice->usbpath, "%s/input0", path);
+
+
+ // Set Input device functions
+ pInput->open = GTCO_InputOpen;
+ pInput->close = GTCO_InputClose;
+
+ // Set input device information
+ pInput->name = "GTCO_CalComp";
+ pInput->phys = pDevice->usbpath;
+ pInput->private = pDevice;
+
+
+ // Now set up all the input device capabilities
+ GTCO_SetupInputCaps(pInput);
+
+#ifdef USE_INPUT_ALLOCATE
+ // Set input device required ID information
+ usb_to_input_id(pDevice->pUSBdev, &pDevice->pInputDev->id);
+ pInput->cdev.dev = &apInterface->dev;
+#else
+ pInput->id.bustype = BUS_USB;
+ pInput->id.vendor = pDevice->pUSBdev->descriptor.idVendor;
+ pInput->id.product = pDevice->pUSBdev->descriptor.idProduct;
+ pInput->id.version = pDevice->pUSBdev->descriptor.bcdDevice;
+
+ pInput->dev = &apInterface->dev;
+#endif
+
+ // Setup the URB, it will be posted later on open of input device
+ endpoint = &apInterface->altsetting[0].endpoint[0].desc;
+
+ usb_fill_int_urb(pDevice->pUrb,
+ pDevice->pUSBdev,
+ usb_rcvintpipe(pDevice->pUSBdev,
+ endpoint->bEndpointAddress),
+ pDevice->buffer,
+ REPORT_MAX_SIZE,
+ gtcoUrbCallback,
+ pDevice,
+ endpoint->bInterval);
+
+ pDevice->pUrb->transfer_dma = pDevice->buf_dma;
+ pDevice->pUrb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+
+ // Save device pointer in USB interface device */
+ usb_set_intfdata(apInterface, pDevice);
+
+ // All done, now register the input device
+ input_register_device(pInput);
+
+ info( "gtco driver created usb: %s\n", path);
+ return 0;
+
+}
+
+/**
+ 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
+
[EMAIL PROTECTED] apInterface Pointer to usb_interface structure
[EMAIL PROTECTED] None
+*/
+static void GTCO_Disconnect(struct usb_interface *apInterface)
+{
+
+ // Grab private device ptr
+ GTCO_DEVICE_T *pDevice = usb_get_intfdata (apInterface);
+ struct input_dev *pInput;
+
+ pInput = GET_INPUT_DEV_PTR(pDevice);
+
+ // Now reverse all the registration stuff
+ if (pDevice) {
+ usb_unlink_urb(pDevice->pUrb);
+ input_unregister_device(pInput);
+ usb_free_urb(pDevice->pUrb);
+ usb_buffer_free(pDevice->pUSBdev, REPORT_MAX_SIZE,
pDevice->buffer,
+ pDevice->buf_dma);
+ kfree(pDevice);
+ }
+
+ info("gtco driver disconnected");
+}
+
+/**********************************************************************
********/
+// STANDARD MODULE LOAD ROUTINES
+/**********************************************************************
********/
+static struct usb_driver gtco_driverinfo_table = {
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,16))
+ .owner = THIS_MODULE,
+#endif
+ .name = "gtco",
+ .id_table = gtco_usbid_table,
+ .probe = GTCO_Probe,
+ .disconnect = GTCO_Disconnect,
+};
+
+/**
+ Register this module with the USB subsystem
+*/
+static int __init GTCO_Init(void)
+{
+ int rc;
+ rc = usb_register(>co_driverinfo_table);
+ if (rc) {
+ err("usb_register() failed rc=0x%x", rc);
+ }
+ printk("GTCO usb driver version: %s",GTCO_VERSION);
+ return rc;
+}
+
+/**
+ Deregister this module with the USB subsystem
+*/
+static void __exit GTCO_Exit(void)
+{
+ usb_deregister(>co_driverinfo_table);
+}
+
+module_init (GTCO_Init);
+module_exit (GTCO_Exit);
+
+//MODULE_LICENSE("Proprietary");
+MODULE_LICENSE("GPL");
diff -uprN a/drivers/usb/input/Kconfig b/drivers/usb/input/Kconfig
--- a/drivers/usb/input/Kconfig 2006-12-11 12:32:53.000000000 -0700
+++ b/drivers/usb/input/Kconfig 2007-01-02 11:09:59.000000000 -0700
@@ -348,3 +348,15 @@ config USB_APPLETOUCH
To compile this driver as a module, choose M here: the
module will be called appletouch.
+
+config USB_GTCO
+ tristate "GTCO CalComp/InterWrite USB Support"
+ depends on USB && INPUT
+ help
+ Say Y here if you want to use the USB version of the GTCO
+ CalComp/InterWrite Tablet. Make sure to say Y to "Mouse
support"
+ (CONFIG_INPUT_MOUSEDEV) and/or "Event interface support"
+ (CONFIG_INPUT_EVDEV) as well.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gtco.
diff -uprN a/drivers/usb/input/Makefile b/drivers/usb/input/Makefile
--- a/drivers/usb/input/Makefile 2006-12-11 12:32:53.000000000
-0700
+++ b/drivers/usb/input/Makefile 2007-01-02 11:08:06.000000000
-0700
@@ -48,6 +48,7 @@ obj-$(CONFIG_USB_ACECAD) += acecad.o
obj-$(CONFIG_USB_YEALINK) += yealink.o
obj-$(CONFIG_USB_XPAD) += xpad.o
obj-$(CONFIG_USB_APPLETOUCH) += appletouch.o
+obj-$(CONFIG_USB_GTCO) += gtco.o
ifeq ($(CONFIG_USB_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
-------------------------------------------------------------------------
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