On Mon, Jul 20, 2015 at 11:03:19PM +0200, Yann Cantin wrote: > Signed-off-by: Yann Cantin <yann.cantin@xxxxxxxxxxx> You need some kind of text in the changelog here... > --- > Documentation/ABI/testing/sysfs-driver-ebeam | 53 ++ > drivers/input/misc/Kconfig | 22 + > drivers/input/misc/Makefile | 1 + > drivers/input/misc/ebeam.c | 777 +++++++++++++++++++++++++++ > 4 files changed, 853 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-driver-ebeam > create mode 100644 drivers/input/misc/ebeam.c > > diff --git a/Documentation/ABI/testing/sysfs-driver-ebeam b/Documentation/ABI/testing/sysfs-driver-ebeam > new file mode 100644 > index 0000000..6873db5 > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-driver-ebeam > @@ -0,0 +1,53 @@ > +What: /sys/class/input/inputXX/device/min_x > + /sys/class/input/inputXX/device/min_y > + /sys/class/input/inputXX/device/max_x > + /sys/class/input/inputXX/device/max_y > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@xxxxxxxxxxx > + linux-usb@xxxxxxxxxxxxxxx > +Description: > + Reading from these files return the actually used range values of > + the reported coordinates. > + Writing to these files preset these range values. > + See below for the calibration procedure. > + > +What: /sys/class/input/inputXX/device/h[1..9] > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@xxxxxxxxxxx > + linux-usb@xxxxxxxxxxxxxxx > +Description: > + Reading from these files return the 3x3 transformation matrix elements > + actually used, in row-major. > + Writing to these files preset these elements values. > + See below for the calibration procedure. > + > +What: /sys/class/input/inputXX/device/calibrated > +Date: Jul 2015 > +Kernel Version: 4.1 > +Contact: yann.cantin@xxxxxxxxxxx > + linux-usb@xxxxxxxxxxxxxxx > +Description: > + Reading from this file : > + - Return 0 if the driver is in "un-calibrated" mode : it actually send > + raw coordinates in the device's internal coordinates system. > + - Return 1 if the driver is in "calibrated" mode : it send computed coordinates > + that (hopefully) matches the screen's coordinates system. > + Writing 1 to this file enable the "calibrated" mode, 0 reset the driver in > + "un-calibrated" mode. > + > +Calibration procedure : > + > +When loaded, the driver is in "un-calibrated" mode : it send device's raw coordinates > +in the [0..65535]x[0..65535] range, the transformation matrix is the identity. > + > +A calibration program have to compute a homography transformation matrix that convert > +the device's raw coordinates to the matching screen's ones. > +It then write to the appropriate sysfs files the computed values, pre-setting the > +driver's parameters : xy range, and the matrix's elements. > +When all values are passed, it write 1 to the calibrated sysfs file to enable the "calibrated" mode. > + > +Warning : The parameters aren't used until 1 is writen to the calibrated sysfs file. > + > +Writing 0 to the calibrated sysfs file reset the driver in "un-calibrated" mode. What tool(s) use these sysfs files? Don't we already have "normal" events for these types of things such that we don't have to make up new sysfs files for these? > diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig > index d4f0a81..22c46a4 100644 > --- a/drivers/input/misc/Kconfig > +++ b/drivers/input/misc/Kconfig > @@ -103,6 +103,28 @@ config INPUT_E3X0_BUTTON > To compile this driver as a module, choose M here: the > module will be called e3x0_button. > > +config INPUT_EBEAM_USB > + tristate "USB eBeam driver" > + depends on USB_ARCH_HAS_HCD > + select USB > + help > + Say Y here if you have a USB eBeam pointing device and want to > + use it without any proprietary user space tools. > + > + Have a look at <http://ebeam.tuxfamily.org/> for > + a usage description and the required user-space tools. > + > + Supported devices : > + - Luidia eBeam Classic Projection and eBeam Edge Projection > + - Nec NP01Wi1 & NP01Wi2 interactive solution > + > + Supposed working devices, need test, may lack functionality : > + - Luidia eBeam Edge Whiteboard and eBeam Engage > + - Hitachi Starboard FX-63, FX-77, FX-82, FX-77GII > + > + To compile this driver as a module, choose M here: the > + module will be called ebeam. > + > config INPUT_PCSPKR > tristate "PC Speaker support" > depends on PCSPKR_PLATFORM > diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile > index 53df07d..125f8a9 100644 > --- a/drivers/input/misc/Makefile > +++ b/drivers/input/misc/Makefile > @@ -28,6 +28,7 @@ obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o > obj-$(CONFIG_INPUT_DA9063_ONKEY) += da9063_onkey.o > obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o > obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o > +obj-$(CONFIG_INPUT_EBEAM_USB) += ebeam.o > obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o > obj-$(CONFIG_INPUT_DRV2665_HAPTICS) += drv2665.o > obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o > diff --git a/drivers/input/misc/ebeam.c b/drivers/input/misc/ebeam.c > new file mode 100644 > index 0000000..79cac51 > --- /dev/null > +++ b/drivers/input/misc/ebeam.c > @@ -0,0 +1,777 @@ > +/****************************************************************************** > + * > + * eBeam driver > + * > + * Copyright (C) 2012-2015 Yann Cantin (yann.cantin@xxxxxxxxxxx) > + * > + * 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. > + * > + * based on > + * > + * usbtouchscreen.c by Daniel Ritz <daniel.ritz@xxxxxx> > + * aiptek.c (sysfs/settings) by Chris Atenasio <chris@xxxxxxxx> > + * Bryan W. Headley <bwheadley@xxxxxxxxxxxxx> > + * > + *****************************************************************************/ > + > +#include <linux/kernel.h> > +#include <linux/slab.h> > +#include <linux/math64.h> > +#include <linux/input.h> > +#include <linux/module.h> > +#include <linux/init.h> > +#include <linux/usb.h> > +#include <linux/usb/input.h> > +#include <asm/unaligned.h> > + > +#define DRIVER_AUTHOR "Yann Cantin <yann.cantin@xxxxxxxxxxx>" > +#define DRIVER_DESC "USB eBeam Driver" > + > +/* Common values for eBeam devices */ > +#define REPT_SIZE 8 /* packet size */ > +#define MIN_RAW_X 0 /* raw coordinates ranges */ > +#define MAX_RAW_X 0xFFFF > +#define MIN_RAW_Y 0 > +#define MAX_RAW_Y 0xFFFF > + > +/* Electronics For Imaging, Inc */ > +#define USB_VENDOR_ID_EFI 0x2650 > + > +/* eBeam hardware : */ > +/* Luidia Classic and Edge */ > +/* Nec NP01Wi1 & NP01Wi2 */ > +#define USB_DEVICE_ID_EFI_EBEAM_USB1 0x1311 > +/* From https://github.com/dpiquet */ > +/* Need confirmation */ > +#define USB_DEVICE_ID_EFI_EBEAM_USB2 0x1315 > +#define USB_DEVICE_ID_EFI_EBEAM_BT_USB1 0x1313 > +#define USB_DEVICE_ID_EFI_EBEAM_BT_USB2 0x1320 > + > +#define EBEAM_BTN_TIP 0x1 /* tip */ > +#define EBEAM_BTN_LIT 0x2 /* little */ > +#define EBEAM_BTN_BIG 0x4 /* big */ > + > +/* ebeam settings */ > +struct ebeam_settings { > + int min_x; /* computed coordinates ranges for the input layer */ > + int max_x; > + int min_y; > + int max_y; > + > + /* H matrix */ > + s64 h1; > + s64 h2; > + s64 h3; > + s64 h4; > + s64 h5; > + s64 h6; > + s64 h7; > + s64 h8; > + s64 h9; > +}; > + > +/* ebeam device */ > +struct ebeam_device { > + unsigned char *data; > + dma_addr_t data_dma; > + unsigned char *buffer; > + int buf_len; > + struct urb *irq; > + struct usb_interface *interface; > + struct input_dev *input; > + char name[128]; > + char phys[64]; > + void *priv; > + > + struct ebeam_settings cursetting; /* device's current settings */ > + struct ebeam_settings newsetting; /* ... and new ones */ > + > + bool calibrated; /* false : send raw */ > + /* true : send computed */ > + > + u16 raw_x; /* raw coordinates */ > + u16 raw_y; > + int x; /* computed coordinates */ > + int y; > + int btn_map; /* internal buttons map */ > +}; > + > +/* device types */ > +enum { > + DEVTYPE_EBEAM, > +}; > + > +static const struct usb_device_id ebeam_devices[] = { > + {USB_DEVICE(USB_VENDOR_ID_EFI, USB_DEVICE_ID_EFI_EBEAM_USB1), > + .driver_info = DEVTYPE_EBEAM}, > + {USB_DEVICE(USB_VENDOR_ID_EFI, USB_DEVICE_ID_EFI_EBEAM_USB2), > + .driver_info = DEVTYPE_EBEAM}, > + {USB_DEVICE(USB_VENDOR_ID_EFI, USB_DEVICE_ID_EFI_EBEAM_BT_USB1), > + .driver_info = DEVTYPE_EBEAM}, > + {USB_DEVICE(USB_VENDOR_ID_EFI, USB_DEVICE_ID_EFI_EBEAM_BT_USB2), > + .driver_info = DEVTYPE_EBEAM}, > + {} > +}; > + > +static void ebeam_init_settings(struct ebeam_device *ebeam) > +{ > + ebeam->calibrated = false; > + > + /* Init (x,y) min/max to raw ones */ > + ebeam->cursetting.min_x = ebeam->newsetting.min_x = MIN_RAW_X; > + ebeam->cursetting.max_x = ebeam->newsetting.max_x = MAX_RAW_X; > + ebeam->cursetting.min_y = ebeam->newsetting.min_y = MIN_RAW_Y; > + ebeam->cursetting.max_y = ebeam->newsetting.max_y = MAX_RAW_Y; > + > + /* Safe values for the H matrix (Identity) */ > + ebeam->cursetting.h1 = ebeam->newsetting.h1 = 1; > + ebeam->cursetting.h2 = ebeam->newsetting.h2 = 0; > + ebeam->cursetting.h3 = ebeam->newsetting.h3 = 0; > + > + ebeam->cursetting.h4 = ebeam->newsetting.h4 = 0; > + ebeam->cursetting.h5 = ebeam->newsetting.h5 = 1; > + ebeam->cursetting.h6 = ebeam->newsetting.h6 = 0; > + > + ebeam->cursetting.h7 = ebeam->newsetting.h7 = 0; > + ebeam->cursetting.h8 = ebeam->newsetting.h8 = 0; > + ebeam->cursetting.h9 = ebeam->newsetting.h9 = 1; > +} > + > +static void ebeam_setup_input(struct ebeam_device *ebeam, > + struct input_dev *input_dev) > +{ > + unsigned long flags; > + > + /* Take event lock while modifying parameters */ > + spin_lock_irqsave(&input_dev->event_lock, flags); > + > + /* Properties */ > + set_bit(INPUT_PROP_DIRECT, input_dev->propbit); > + > + /* Events generated */ > + set_bit(EV_KEY, input_dev->evbit); > + set_bit(EV_ABS, input_dev->evbit); > + > + /* Keys */ > + set_bit(BTN_LEFT, input_dev->keybit); > + set_bit(BTN_MIDDLE, input_dev->keybit); > + set_bit(BTN_RIGHT, input_dev->keybit); > + > + /* Axis */ > + if (!ebeam->calibrated) { > + ebeam->cursetting.min_x = MIN_RAW_X; > + ebeam->cursetting.max_x = MAX_RAW_X; > + ebeam->cursetting.min_y = MIN_RAW_Y; > + ebeam->cursetting.max_y = MAX_RAW_Y; > + } > + > + input_set_abs_params(input_dev, ABS_X, > + ebeam->cursetting.min_x, ebeam->cursetting.max_x, > + 0, 0); > + input_set_abs_params(input_dev, ABS_Y, > + ebeam->cursetting.min_y, ebeam->cursetting.max_y, > + 0, 0); > + > + spin_unlock_irqrestore(&input_dev->event_lock, flags); > +} > + > +/******************************************************************************* > + * sysfs part > + */ > + > +/* > + * screen min/max and H matrix coefs > + * _get return *current* value > + * _set set new value > + */ > +#define DEVICE_MINMAX_ATTR(MM) \ > +static ssize_t ebeam_##MM##_get(struct device *dev, \ > + struct device_attribute *attr, \ > + char *buf) \ > +{ \ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); \ > + \ > + return snprintf(buf, PAGE_SIZE, "%d\n", ebeam->cursetting.MM); \ > +} \ > +static ssize_t ebeam_##MM##_set(struct device *dev, \ > + struct device_attribute *attr, \ > + const char *buf, \ > + size_t count) \ > +{ \ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); \ > + int err, MM; \ > + \ > + err = kstrtoint(buf, 10, &MM); \ > + if (err) \ > + return err; \ > + \ > + ebeam->newsetting.MM = MM; \ > + return count; \ > +} \ > +static DEVICE_ATTR(MM, S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP, \ > + ebeam_##MM##_get, \ > + ebeam_##MM##_set) DEVICE_ATTR_RW()? > + > +DEVICE_MINMAX_ATTR(min_x); > +DEVICE_MINMAX_ATTR(max_x); > +DEVICE_MINMAX_ATTR(min_y); > +DEVICE_MINMAX_ATTR(max_y); > + > +#define DEVICE_H_ATTR(SET_ID) \ > +static ssize_t ebeam_h##SET_ID##_get(struct device *dev, \ > + struct device_attribute *attr, \ > + char *buf) \ > +{ \ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); \ > + \ > + return snprintf(buf, PAGE_SIZE, "%lld\n", ebeam->cursetting.h##SET_ID);\ > +} \ > +static ssize_t ebeam_h##SET_ID##_set(struct device *dev, \ > + struct device_attribute *attr, \ > + const char *buf, \ > + size_t count) \ > +{ \ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); \ > + int err; \ > + u64 h; \ > + \ > + err = kstrtoll(buf, 10, &h); \ > + if (err) \ > + return err; \ > + \ > + ebeam->newsetting.h##SET_ID = h; \ > + return count; \ > +} \ > +static DEVICE_ATTR(h##SET_ID, S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP, \ > + ebeam_h##SET_ID##_get, \ > + ebeam_h##SET_ID##_set) DEVICE_ATTR_RW()? > + > +DEVICE_H_ATTR(1); > +DEVICE_H_ATTR(2); > +DEVICE_H_ATTR(3); > +DEVICE_H_ATTR(4); > +DEVICE_H_ATTR(5); > +DEVICE_H_ATTR(6); > +DEVICE_H_ATTR(7); > +DEVICE_H_ATTR(8); > +DEVICE_H_ATTR(9); > + > +/* > + * sysfs calibrated > + * Once H matrix coefs are set, writing 1 to this file triggers > + * coordinates mapping. > + * Anything else reset the device to un-calibrated mode, > + * storing cursetting in newsetting. > +*/ > +static ssize_t ebeam_calibrated_get(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); > + > + return snprintf(buf, PAGE_SIZE, "%d\n", ebeam->calibrated); > +} > + > +static ssize_t ebeam_calibrated_set(struct device *dev, > + struct device_attribute *attr, > + const char *buf, > + size_t count) > +{ > + struct ebeam_device *ebeam = dev_get_drvdata(dev); > + int err, c; > + > + err = kstrtoint(buf, 10, &c); > + if (err) > + return err; > + > + if (c == 1) { > + memcpy(&ebeam->cursetting, &ebeam->newsetting, > + sizeof(struct ebeam_settings)); > + ebeam->calibrated = true; > + ebeam_setup_input(ebeam, ebeam->input); > + } else { > + memcpy(&ebeam->newsetting, &ebeam->cursetting, > + sizeof(struct ebeam_settings)); > + ebeam->calibrated = false; > + ebeam_setup_input(ebeam, ebeam->input); > + } > + > + return count; > +} > + > +static DEVICE_ATTR(calibrated, S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP, > + ebeam_calibrated_get, ebeam_calibrated_set); DEVICE_ATTR_RW()? > + > +static struct attribute *ebeam_attrs[] = { > + &dev_attr_min_x.attr, > + &dev_attr_min_y.attr, > + &dev_attr_max_x.attr, > + &dev_attr_max_y.attr, > + &dev_attr_h1.attr, > + &dev_attr_h2.attr, > + &dev_attr_h3.attr, > + &dev_attr_h4.attr, > + &dev_attr_h5.attr, > + &dev_attr_h6.attr, > + &dev_attr_h7.attr, > + &dev_attr_h8.attr, > + &dev_attr_h9.attr, > + &dev_attr_calibrated.attr, > + NULL > +}; > + > +static const struct attribute_group ebeam_attr_group = { > + .attrs = ebeam_attrs, > +}; > + > +/* IRQ */ > +static int ebeam_read_data(struct ebeam_device *ebeam, unsigned char *pkt) > +{ > + > +/* > + * Packet description : 8 bytes > + * > + * nop packet : FF FF FF FF FF FF FF FF > + * > + * pkt[0] : Sensors > + * bit 1 : ultrasound signal (guessed) > + * bit 2 : IR signal (tested with a remote...) ; > + * readings OK : 0x03 (anything else is a show-stopper) > + * > + * pkt[1] : raw_x low > + * pkt[2] : raw_x high > + * > + * pkt[3] : raw_y low > + * pkt[4] : raw_y high > + * > + * pkt[5] : fiability ? > + * often 0xC0 > + * > 0x80 : OK > + * > + * pkt[6] : > + * buttons state (low 4 bits) > + * 0x1 = no buttons > + * bit 0 : tip (WARNING inversed : 0=pressed) > + * bit 1 : ? (always 0 during tests) > + * bit 2 : little (1=pressed) > + * bit 3 : big (1=pressed) > + * > + * pointer ID : (high 4 bits) > + * Tested : 0x6=wand ; > + * Guessed : 0x1=red ; 0x2=blue ; 0x3=green ; 0x4=black ; > + * 0x5=eraser > + * bit 4 : pointer ID > + * bit 5 : pointer ID > + * bit 6 : pointer ID > + * bit 7 : pointer ID > + * > + * > + * pkt[7] : fiability ? > + * often 0xFF > + * > + */ > + > + /* Filtering bad/nop packet */ > + if (pkt[0] != 0x03) > + return 0; > + > + ebeam->raw_x = get_unaligned_le16(&pkt[1]); > + ebeam->raw_y = get_unaligned_le16(&pkt[3]); > + > + ebeam->btn_map = (!(pkt[6] & 0x1)) | > + ((pkt[6] & 0x4) >> 1) | > + ((pkt[6] & 0x8) >> 1); > + > + return 1; > +} > + > +/* > + * IRQ > + * compute screen coordinates from raw > + * Overflow and negative values are ignored > + */ > +static bool ebeam_calculate_xy(struct ebeam_device *ebeam) > +{ > + /* 64-bits divisions handled by div64_s64 */ > + > + s64 scale; > + > + if (!ebeam->calibrated) { > + ebeam->x = ebeam->raw_x; > + ebeam->y = ebeam->raw_y; > + } else { > + scale = ebeam->cursetting.h7 * ebeam->raw_x + > + ebeam->cursetting.h8 * ebeam->raw_y + > + ebeam->cursetting.h9; > + > + /* Who want a division by zero in kernel ? */ > + if (scale == 0) { > + dev_err(&(ebeam->interface)->dev, > + "%s - Division by zero, wrong calibration.\n", > + __func__); > + dev_err(&(ebeam->interface)->dev, > + "%s - Resetting to un-calibrated mode.\n", > + __func__); > + ebeam->calibrated = false; > + return 0; > + } > + > + /* > + * We *must* round the result, but can't do (int) (v1/v2 + 0.5) > + * > + * (int) (v1/v2 + 0.5) <=> (int) ( (2*v1 + v2)/(2*v2) ) > + */ > + ebeam->x = > + (int)div64_s64((((ebeam->cursetting.h1 * ebeam->raw_x + > + ebeam->cursetting.h2 * ebeam->raw_y + > + ebeam->cursetting.h3) << 1) + scale), > + (scale << 1)); > + ebeam->y = > + (int)div64_s64((((ebeam->cursetting.h4 * ebeam->raw_x + > + ebeam->cursetting.h5 * ebeam->raw_y + > + ebeam->cursetting.h6) << 1) + scale), > + (scale << 1)); > + > + /* check range */ > + if ((ebeam->x < ebeam->cursetting.min_x) || > + (ebeam->x > ebeam->cursetting.max_x) || > + (ebeam->y < ebeam->cursetting.min_y) || > + (ebeam->y > ebeam->cursetting.max_y)) > + return 0; > + } > + > + return 1; > +} > + > +/* IRQ */ > +static void ebeam_report_input(struct ebeam_device *ebeam) > +{ > + input_report_key(ebeam->input, BTN_LEFT, > + (ebeam->btn_map & EBEAM_BTN_TIP)); > + input_report_key(ebeam->input, BTN_MIDDLE, > + (ebeam->btn_map & EBEAM_BTN_LIT)); > + input_report_key(ebeam->input, BTN_RIGHT, > + (ebeam->btn_map & EBEAM_BTN_BIG)); > + > + input_report_abs(ebeam->input, ABS_X, ebeam->x); > + input_report_abs(ebeam->input, ABS_Y, ebeam->y); > + > + input_sync(ebeam->input); > +} > + > +/* IRQ */ > +static void ebeam_process_pkt(struct ebeam_device *ebeam, > + unsigned char *pkt, int len) > +{ > + if (!ebeam_read_data(ebeam, pkt)) > + return; > + > + if (!ebeam_calculate_xy(ebeam)) > + return; > + > + ebeam_report_input(ebeam); > +} > + > +/* IRQ > + * handler */ > +static void ebeam_irq(struct urb *urb) > +{ > + struct ebeam_device *ebeam = urb->context; > + struct device *dev = &ebeam->interface->dev; > + int retval; > + > + switch (urb->status) { > + case 0: > + /* success */ > + break; > + case -ETIME: > + /* this urb is timing out */ > + dev_dbg(dev, > + "%s - urb timed out - was the device unplugged?\n", > + __func__); > + return; > + case -ECONNRESET: > + case -ENOENT: > + case -ESHUTDOWN: > + case -EPIPE: > + /* this urb is terminated, clean up */ > + dev_dbg(dev, "%s - urb shutting down with status: %d\n", > + __func__, urb->status); > + return; > + default: > + dev_dbg(dev, "%s - nonzero urb status received: %d\n", > + __func__, urb->status); > + goto exit; > + } > + > + ebeam_process_pkt(ebeam, ebeam->data, urb->actual_length); > + > +exit: > + usb_mark_last_busy(interface_to_usbdev(ebeam->interface)); > + retval = usb_submit_urb(urb, GFP_ATOMIC); > + if (retval) > + dev_err(dev, "%s - usb_submit_urb failed with result: %d\n", > + __func__, retval); > +} > + > +static int ebeam_open(struct input_dev *input) > +{ > + struct ebeam_device *ebeam = input_get_drvdata(input); > + int r; > + > + ebeam->irq->dev = interface_to_usbdev(ebeam->interface); > + > + r = usb_autopm_get_interface(ebeam->interface) ? -EIO : 0; > + if (r < 0) > + goto out; > + > + if (usb_submit_urb(ebeam->irq, GFP_KERNEL)) { > + r = -EIO; > + goto out_put; > + } > + > + ebeam->interface->needs_remote_wakeup = 1; > +out_put: > + usb_autopm_put_interface(ebeam->interface); > +out: > + return r; > +} > + > +static void ebeam_close(struct input_dev *input) > +{ > + struct ebeam_device *ebeam = input_get_drvdata(input); > + int r; > + > + r = usb_autopm_get_interface(ebeam->interface); > + > + usb_kill_urb(ebeam->irq); > + ebeam->interface->needs_remote_wakeup = 0; > + > + if (!r) > + usb_autopm_put_interface(ebeam->interface); > +} > + > +static int ebeam_suspend(struct usb_interface *intf, pm_message_t message) > +{ > + struct ebeam_device *ebeam = usb_get_intfdata(intf); > + > + usb_kill_urb(ebeam->irq); > + > + return 0; > +} > + > +static int ebeam_resume(struct usb_interface *intf) > +{ > + struct ebeam_device *ebeam = usb_get_intfdata(intf); > + struct input_dev *input = ebeam->input; > + int result = 0; > + > + mutex_lock(&input->mutex); > + if (input->users) > + result = usb_submit_urb(ebeam->irq, GFP_NOIO); > + mutex_unlock(&input->mutex); > + > + return result; > +} > + > +static void ebeam_free_buffers(struct usb_device *udev, > + struct ebeam_device *ebeam) > +{ > + usb_free_coherent(udev, REPT_SIZE, ebeam->data, ebeam->data_dma); > + kfree(ebeam->buffer); > +} > + > +static struct usb_endpoint_descriptor > +*ebeam_get_input_endpoint(struct usb_host_interface *interface) > +{ > + int i; > + > + for (i = 0; i < interface->desc.bNumEndpoints; i++) > + if (usb_endpoint_dir_in(&interface->endpoint[i].desc)) > + return &interface->endpoint[i].desc; > + > + return NULL; > +} > + > +static int ebeam_probe(struct usb_interface *intf, > + const struct usb_device_id *id) > +{ > + struct ebeam_device *ebeam; > + struct input_dev *input_dev; > + struct usb_endpoint_descriptor *endpoint; > + struct usb_device *udev = interface_to_usbdev(intf); > + int err = -ENOMEM; > + > + endpoint = ebeam_get_input_endpoint(intf->cur_altsetting); > + if (!endpoint) > + return -ENXIO; > + > + ebeam = kzalloc(sizeof(struct ebeam_device), GFP_KERNEL); > + input_dev = input_allocate_device(); > + if (!ebeam || !input_dev) > + goto out_free; > + > + ebeam_init_settings(ebeam); > + > + ebeam->data = usb_alloc_coherent(udev, REPT_SIZE, > + GFP_KERNEL, &ebeam->data_dma); > + if (!ebeam->data) > + goto out_free; > + > + ebeam->irq = usb_alloc_urb(0, GFP_KERNEL); > + if (!ebeam->irq) { > + dev_dbg(&intf->dev, > + "%s - usb_alloc_urb failed: ebeam->irq\n", __func__); > + goto out_free_buffers; > + } > + > + ebeam->interface = intf; > + ebeam->input = input_dev; > + > + /* setup name */ > + snprintf(ebeam->name, sizeof(ebeam->name), > + "USB eBeam %04x:%04x", > + le16_to_cpu(udev->descriptor.idVendor), > + le16_to_cpu(udev->descriptor.idProduct)); > + > + if (udev->manufacturer || udev->product) { > + strlcat(ebeam->name, " (", sizeof(ebeam->name)); > + > + if (udev->manufacturer) > + strlcat(ebeam->name, > + udev->manufacturer, > + sizeof(ebeam->name)); > + > + if (udev->product) { > + if (udev->manufacturer) > + strlcat(ebeam->name, " ", sizeof(ebeam->name)); > + strlcat(ebeam->name, > + udev->product, > + sizeof(ebeam->name)); > + } > + > + if (strlcat(ebeam->name, ")", sizeof(ebeam->name)) > + >= sizeof(ebeam->name)) { > + /* overflowed, closing ) anyway */ > + ebeam->name[sizeof(ebeam->name) - 2] = ')'; > + } > + } > + > + /* usb tree */ > + usb_make_path(udev, ebeam->phys, sizeof(ebeam->phys)); > + strlcat(ebeam->phys, "/input0", sizeof(ebeam->phys)); > + > + /* input setup */ > + input_dev->name = ebeam->name; > + input_dev->phys = ebeam->phys; > + usb_to_input_id(udev, &input_dev->id); > + input_dev->dev.parent = &intf->dev; > + > + input_set_drvdata(input_dev, ebeam); > + > + input_dev->open = ebeam_open; > + input_dev->close = ebeam_close; > + > + /* usb urb setup */ > + if (usb_endpoint_type(endpoint) == USB_ENDPOINT_XFER_INT) > + usb_fill_int_urb(ebeam->irq, > + udev, > + usb_rcvintpipe(udev, > + endpoint->bEndpointAddress), > + ebeam->data, > + REPT_SIZE, > + ebeam_irq, > + ebeam, > + endpoint->bInterval); > + else > + usb_fill_bulk_urb(ebeam->irq, > + udev, > + usb_rcvbulkpipe(udev, > + endpoint->bEndpointAddress), > + ebeam->data, > + REPT_SIZE, > + ebeam_irq, > + ebeam); > + > + ebeam->irq->dev = udev; > + ebeam->irq->transfer_dma = ebeam->data_dma; > + ebeam->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; > + > + /* usb final setup */ > + usb_set_intfdata(intf, ebeam); > + > + /* sysfs setup */ > + err = sysfs_create_group(&intf->dev.kobj, &ebeam_attr_group); Ick, you just added the sysfs files to the USB device, not your input device, are you sure you tested this? And there should be a race-free way to add an attribute group to an input device, as this is, you are adding them to the device _after_ it is created, so userspace will not see them at creation time, causing a race. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
