diff options
Diffstat (limited to 'drivers/usb/input/gtco.c')
| -rw-r--r-- | drivers/usb/input/gtco.c | 1055 |
1 files changed, 0 insertions, 1055 deletions
diff --git a/drivers/usb/input/gtco.c b/drivers/usb/input/gtco.c deleted file mode 100644 index b2ca10f2fe0..00000000000 --- a/drivers/usb/input/gtco.c +++ /dev/null @@ -1,1055 +0,0 @@ -/* -*- linux-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; 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/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> -#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 - - -/* Bitmask whether pen is in range */ -#define MASK_INRANGE 0x20 -#define MASK_BUTTON 0x01F - -#define PATHLENGTH 64 - -/* 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 */ -struct gtco { - - struct input_dev *inputdevice; /* input device struct pointer */ - struct usb_device *usbdev; /* the usb device 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) -{ - 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[10] = ""; - - - dbg("======>>>>>>PARSE<<<<<<======"); - - /* Walk this report and pull out the info we need */ - while (i < length) { - prefix = report[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 = report[i]; - break; - case 2: - data16 = le16_to_cpu(get_unaligned((__le16 *)&report[i])); - break; - case 3: - size = 4; - data32 = le32_to_cpu(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"); - - dbg("::::: Saving Report: %d input #%d Max: 0x%X(%d) Min:0x%X(%d) of %d bits", - 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 */ - dbg("GER: X Usage: 0x%x", 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 */ - dbg("GER: Y Usage: 0x%x", 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 (data == 0) { - dbg("======>>>>>> Physical"); - strcpy(globtype, "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++) - oldval[x] = globalval[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++) - globalval[x] = oldval[x]; - - break; - } - - switch (size) { - case 1: - dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", - indentstr, tag, maintype, size, globtype, data); - break; - - case 2: - dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", - indentstr, tag, maintype, size, globtype, data16); - break; - - case 4: - dbg("%sMAINTAG:(%d) %c SIZE: %d Data: %s 0x%x", - 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: - dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x", - indentstr, globtype, tag, size, data); - globalval[tag] = data; - break; - - case 2: - dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x", - indentstr, globtype, tag, size, data16); - globalval[tag] = data16; - break; - - case 4: - dbg("%sGLOBALTAG:%s(%d) SIZE: %d Data: 0x%x", - indentstr, globtype, tag, size, data32); - globalval[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(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: - dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", - indentstr, tag, globtype, size, data); - break; - - case 2: - dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", - indentstr, tag, globtype, size, data16); - break; - - case 4: - dbg("%sLOCALTAG:(%d) %s SIZE: %d Data: 0x%x", - 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 = device->usbdev; - 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(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC); - - /* Misc event menu block */ - inputdev->mscbit[0] = BIT(MSC_SCAN)|BIT(MSC_SERIAL)|BIT(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; - s8 valsigned = 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); - - /* Fall thru */ - case 4: - /* Tilt */ - - /* Sign extend these 7 bit numbers. */ - if (device->buffer[6] & 0x40) - device->buffer[6] |= 0x80; - - if (device->buffer[7] & 0x40) - device->buffer[7] |= 0x80; - - - valsigned = (device->buffer[6]); - input_report_abs(inputdev, ABS_TILT_X, (s32)valsigned); - - valsigned = (device->buffer[7]); - input_report_abs(inputdev, ABS_TILT_Y, (s32)valsigned); - - /* Fall thru */ - 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); - - /* Fall thru */ - case 1: - /* All reports have X and Y coords in the same place */ - val = le16_to_cpu(get_unaligned((__le16 *)&device->buffer[1])); - input_report_abs(inputdev, ABS_X, val); - - val = le16_to_cpu(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; - dbg("======>>>>>>REPORT 1: val 0x%X(%d)", - 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 = le16_to_cpu(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 = le16_to_cpu(get_unaligned((__le16 *)&device->buffer[1])); - input_report_abs(inputdev, ABS_X, val); - - val = le16_to_cpu(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) - 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 *usbinterface, - const struct usb_device_id *id) -{ - - struct gtco *gtco; - struct input_dev *input_dev; - struct hid_descriptor *hid_desc; - char *report = NULL; - int result = 0, retry; - int error; - struct usb_endpoint_descriptor *endpoint; - - /* Allocate memory for device structure */ - gtco = kzalloc(sizeof(struct gtco), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!gtco || !input_dev) { - err("No more memory"); - error = -ENOMEM; - goto err_free_devs; - } - - /* Set pointer to the input device */ - gtco->inputdevice = input_dev; - - /* Save interface information */ - gtco->usbdev = usb_get_dev(interface_to_usbdev(usbinterface)); - - /* Allocate some data for incoming reports */ - gtco->buffer = usb_buffer_alloc(gtco->usbdev, REPORT_MAX_SIZE, - GFP_KERNEL, >co->buf_dma); - if (!gtco->buffer) { - err("No more memory for us buffers"); - error = -ENOMEM; - goto err_free_devs; - } - - /* Allocate URB for reports */ - gtco->urbinfo = usb_alloc_urb(0, GFP_KERNEL); - if (!gtco->urbinfo) { - err("Failed to allocate URB"); - return -ENOMEM; - goto err_free_buf; - } - - /* - * The endpoint is always altsetting 0, we know this since we know - * this device only has one interrupt endpoint - */ - endpoint = &usbinterface->altsetting[0].endpoint[0].desc; - - /* Some debug */ - dbg("gtco # interfaces: %d", usbinterface->num_altsetting); - dbg("num endpoints: %d", usbinterface->cur_altsetting->desc.bNumEndpoints); - dbg("interface class: %d", usbinterface->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 ", usbinterface->altsetting[0].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){ - err("Can't retrieve exta USB descriptor to get hid report descriptor length"); - error = -EIO; - goto err_free_urb; - } - - dbg("Extra descriptor success: type:%d len:%d", - hid_desc->bDescriptorType, hid_desc->wDescriptorLength); - - report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL); - if (!report) { - err("No more memory for report"); - error = -ENOMEM; - goto err_free_urb; - } - - /* Couple of tries to get reply */ - for (retry = 0; retry < 3; retry++) { - result = usb_control_msg(gtco->usbdev, - usb_rcvctrlpipe(gtco->usbdev, 0), - USB_REQ_GET_DESCRIPTOR, - USB_RECIP_INTERFACE | USB_DIR_IN, - REPORT_DEVICE_TYPE << 8, - 0, /* interface */ - report, - hid_desc->wDescriptorLength, - 5000); /* 5 secs */ - - if (result == hid_desc->wDescriptorLength) - break; - } - - /* If we didn't get the report, fail */ - dbg("usb_control_msg result: :%d", result); - if (result != hid_desc->wDescriptorLength) { - err("Failed to get HID Report Descriptor of size: %d", - hid_desc->wDescriptorLength); - error = -EIO; - goto err_free_urb; - } - - /* Now we parse the report */ - parse_hid_report_descriptor(gtco, report, result); - - /* Now we delete it */ - kfree(report); - - /* Create a device file node */ - usb_make_path(gtco->usbdev, 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(gtco->usbdev, &input_dev->id); - input_dev->dev.parent = &usbinterface->dev; - - /* Setup the URB, it will be posted later on open of input device */ - endpoint = &usbinterface->altsetting[0].endpoint[0].desc; - - usb_fill_int_urb(gtco->urbinfo, - gtco->usbdev, - usb_rcvintpipe(gtco->usbdev, - 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_buffer_free(gtco->usbdev, REPORT_MAX_SIZE, - gtco->buffer, gtco->buf_dma); - err_free_devs: - kfree(report); - 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); - - /* Now reverse all the registration stuff */ - if (gtco) { - input_unregister_device(gtco->inputdevice); - usb_kill_urb(gtco->urbinfo); - usb_free_urb(gtco->urbinfo); - usb_buffer_free(gtco->usbdev, REPORT_MAX_SIZE, - gtco->buffer, gtco->buf_dma); - kfree(gtco); - } - - info("gtco driver disconnected"); -} - -/* STANDARD MODULE LOAD ROUTINES */ - -static struct usb_driver gtco_driverinfo_table = { - .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 error; - - error = usb_register(>co_driverinfo_table); - if (error) { - err("usb_register() failed rc=0x%x", error); - return error; - } - - printk("GTCO usb driver version: %s", GTCO_VERSION); - return 0; -} - -/* - * 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("GPL"); |