kernel_optimize_test/drivers/hid/hid-lg4ff.c

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/*
* Force feedback support for Logitech Gaming Wheels
*
* Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
* Speed Force Wireless (WiiWheel)
*
* Copyright (c) 2010 Simon Wood <simon@mungewell.org>
*/
/*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/hid.h>
#include "usbhid/usbhid.h"
#include "hid-lg.h"
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
#include "hid-ids.h"
#define DFGT_REV_MAJ 0x13
#define DFGT_REV_MIN 0x22
#define DFGT2_REV_MIN 0x26
#define DFP_REV_MAJ 0x11
#define DFP_REV_MIN 0x06
#define FFEX_REV_MAJ 0x21
#define FFEX_REV_MIN 0x00
#define G25_REV_MAJ 0x12
#define G25_REV_MIN 0x22
#define G27_REV_MAJ 0x12
#define G27_REV_MIN 0x38
#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
struct lg4ff_device_entry {
__u32 product_id;
__u16 range;
__u16 min_range;
__u16 max_range;
#ifdef CONFIG_LEDS_CLASS
__u8 led_state;
struct led_classdev *led[5];
#endif
struct list_head list;
void (*set_range)(struct hid_device *hid, u16 range);
};
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
static const signed short lg4ff_wheel_effects[] = {
FF_CONSTANT,
FF_AUTOCENTER,
-1
};
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
struct lg4ff_wheel {
const __u32 product_id;
const signed short *ff_effects;
const __u16 min_range;
const __u16 max_range;
void (*set_range)(struct hid_device *hid, u16 range);
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
};
static const struct lg4ff_wheel lg4ff_devices[] = {
{USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
{USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
{USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
};
struct lg4ff_native_cmd {
const __u8 cmd_num; /* Number of commands to send */
const __u8 cmd[];
};
struct lg4ff_usb_revision {
const __u16 rev_maj;
const __u16 rev_min;
const struct lg4ff_native_cmd *command;
};
static const struct lg4ff_native_cmd native_dfp = {
1,
{0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
};
static const struct lg4ff_native_cmd native_dfgt = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
};
static const struct lg4ff_native_cmd native_g25 = {
1,
{0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
};
static const struct lg4ff_native_cmd native_g27 = {
2,
{0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
};
static const struct lg4ff_usb_revision lg4ff_revs[] = {
{DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
{DFGT_REV_MAJ, DFGT2_REV_MIN, &native_dfgt}, /* Driving Force GT v2 */
{DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
{G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
{G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
};
/* Recalculates X axis value accordingly to currently selected range */
static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
{
__u16 max_range;
__s32 new_value;
if (range == 900)
return value;
else if (range == 200)
return value;
else if (range < 200)
max_range = 200;
else
max_range = 900;
new_value = 8192 + mult_frac(value - 8192, max_range, range);
if (new_value < 0)
return 0;
else if (new_value > 16383)
return 16383;
else
return new_value;
}
int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
struct hid_usage *usage, __s32 value, struct lg_drv_data *drv_data)
{
struct lg4ff_device_entry *entry = drv_data->device_props;
__s32 new_value = 0;
if (!entry) {
hid_err(hid, "Device properties not found");
return 0;
}
switch (entry->product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
switch (usage->code) {
case ABS_X:
new_value = lg4ff_adjust_dfp_x_axis(value, entry->range);
input_event(field->hidinput->input, usage->type, usage->code, new_value);
return 1;
default:
return 0;
}
default:
return 0;
}
}
static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
{
struct hid_device *hid = input_get_drvdata(dev);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
int x;
#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
switch (effect->type) {
case FF_CONSTANT:
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
CLAMP(x);
value[0] = 0x11; /* Slot 1 */
value[1] = 0x08;
value[2] = x;
value[3] = 0x80;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
usbhid_submit_report(hid, report, USB_DIR_OUT);
break;
}
return 0;
}
/* Sends default autocentering command compatible with
* all wheels except Formula Force EX */
static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
{
struct hid_device *hid = input_get_drvdata(dev);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
value[0] = 0xfe;
value[1] = 0x0d;
value[2] = magnitude >> 13;
value[3] = magnitude >> 13;
value[4] = magnitude >> 8;
value[5] = 0x00;
value[6] = 0x00;
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
/* Sends autocentering command compatible with Formula Force EX */
static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
{
struct hid_device *hid = input_get_drvdata(dev);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
magnitude = magnitude * 90 / 65535;
value[0] = 0xfe;
value[1] = 0x03;
value[2] = magnitude >> 14;
value[3] = magnitude >> 14;
value[4] = magnitude;
value[5] = 0x00;
value[6] = 0x00;
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
/* Sends command to set range compatible with G25/G27/Driving Force GT */
static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
value[0] = 0xf8;
value[1] = 0x81;
value[2] = range & 0x00ff;
value[3] = (range & 0xff00) >> 8;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
/* Sends commands to set range compatible with Driving Force Pro wheel */
static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
int start_left, start_right, full_range;
__s32 *value = report->field[0]->value;
dbg_hid("Driving Force Pro: setting range to %u\n", range);
/* Prepare "coarse" limit command */
value[0] = 0xf8;
value[1] = 0x00; /* Set later */
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
if (range > 200) {
report->field[0]->value[1] = 0x03;
full_range = 900;
} else {
report->field[0]->value[1] = 0x02;
full_range = 200;
}
usbhid_submit_report(hid, report, USB_DIR_OUT);
/* Prepare "fine" limit command */
value[0] = 0x81;
value[1] = 0x0b;
value[2] = 0x00;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
if (range == 200 || range == 900) { /* Do not apply any fine limit */
usbhid_submit_report(hid, report, USB_DIR_OUT);
return;
}
/* Construct fine limit command */
start_left = (((full_range - range + 1) * 2047) / full_range);
start_right = 0xfff - start_left;
value[2] = start_left >> 4;
value[3] = start_right >> 4;
value[4] = 0xff;
value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
value[6] = 0xff;
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__u8 i, j;
j = 0;
while (j < 7*cmd->cmd_num) {
for (i = 0; i < 7; i++)
report->field[0]->value[i] = cmd->cmd[j++];
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
}
/* Read current range and display it in terminal */
static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
size_t count;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return 0;
}
count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
return count;
}
/* Set range to user specified value, call appropriate function
* according to the type of the wheel */
static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
__u16 range = simple_strtoul(buf, NULL, 10);
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Private driver data not found!\n");
return 0;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found!\n");
return 0;
}
if (range == 0)
range = entry->max_range;
/* Check if the wheel supports range setting
* and that the range is within limits for the wheel */
if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
entry->set_range(hid, range);
entry->range = range;
}
return count;
}
#ifdef CONFIG_LEDS_CLASS
static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
{
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
__s32 *value = report->field[0]->value;
value[0] = 0xf8;
value[1] = 0x12;
value[2] = leds;
value[3] = 0x00;
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
usbhid_submit_report(hid, report, USB_DIR_OUT);
}
static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct device *dev = led_cdev->dev->parent;
struct hid_device *hid = container_of(dev, struct hid_device, dev);
struct lg_drv_data *drv_data = hid_get_drvdata(hid);
struct lg4ff_device_entry *entry;
int i, state = 0;
if (!drv_data) {
hid_err(hid, "Device data not found.");
return;
}
entry = (struct lg4ff_device_entry *)drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found.");
return;
}
for (i = 0; i < 5; i++) {
if (led_cdev != entry->led[i])
continue;
state = (entry->led_state >> i) & 1;
if (value == LED_OFF && state) {
entry->led_state &= ~(1 << i);
lg4ff_set_leds(hid, entry->led_state);
} else if (value != LED_OFF && !state) {
entry->led_state |= 1 << i;
lg4ff_set_leds(hid, entry->led_state);
}
break;
}
}
static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
{
struct device *dev = led_cdev->dev->parent;
struct hid_device *hid = container_of(dev, struct hid_device, dev);
struct lg_drv_data *drv_data = hid_get_drvdata(hid);
struct lg4ff_device_entry *entry;
int i, value = 0;
if (!drv_data) {
hid_err(hid, "Device data not found.");
return LED_OFF;
}
entry = (struct lg4ff_device_entry *)drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found.");
return LED_OFF;
}
for (i = 0; i < 5; i++)
if (led_cdev == entry->led[i]) {
value = (entry->led_state >> i) & 1;
break;
}
return value ? LED_FULL : LED_OFF;
}
#endif
int lg4ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
struct input_dev *dev = hidinput->input;
struct hid_report *report;
struct hid_field *field;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
struct usb_device_descriptor *udesc;
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
int error, i, j;
__u16 bcdDevice, rev_maj, rev_min;
/* Find the report to use */
if (list_empty(report_list)) {
hid_err(hid, "No output report found\n");
return -1;
}
/* Check that the report looks ok */
report = list_entry(report_list->next, struct hid_report, list);
if (!report) {
hid_err(hid, "NULL output report\n");
return -1;
}
field = report->field[0];
if (!field) {
hid_err(hid, "NULL field\n");
return -1;
}
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
/* Check what wheel has been connected */
for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
if (hid->product == lg4ff_devices[i].product_id) {
dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
break;
}
}
if (i == ARRAY_SIZE(lg4ff_devices)) {
hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
"LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
return -1;
}
/* Attempt to switch wheel to native mode when applicable */
udesc = &(hid_to_usb_dev(hid)->descriptor);
if (!udesc) {
hid_err(hid, "NULL USB device descriptor\n");
return -1;
}
bcdDevice = le16_to_cpu(udesc->bcdDevice);
rev_maj = bcdDevice >> 8;
rev_min = bcdDevice & 0xff;
if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
dbg_hid("Generic wheel detected, can it do native?\n");
dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
hid_info(hid, "Switched to native mode\n");
}
}
}
HID: lg4ff - Move handling of Logitech wheels to lg4ff driver This is the first out of five patches me and Simon Wood (CC'd) have been working on. It separates the handling of Logite from the generic lgff driver and adds additional features specific for the Logitech wheels, namely - Native mode support for Driving Force GT, Driving Force Pro, G25 and G27 wheels Every Logitech wheel reports itself as generic Logitech Driving Force wheel (VID 046d, PID c294). This is done to ensu wheel will work on every USB HID-aware system even when no Logitech driver is available. It however limits the capabilit wheel - range is limited to 200 degrees, G25/G27 don't report the clutch pedal and there is only one combined axis for t brake. The switch to native mode is done via hardware-specific command which is different for each wheel. When the wheel receives such command, it simulates reconnect and reports to the OS with its actual PID. - Adjustable wheel range DFGT, DFP, G25 and G27 have variable range of the steering wheel. The range is limited by applying a maximum constant when the wheel is turned beyond the allowed range. The limit as also set by a hardware-specific command. There is a comm command for DFGT, G25 and G27 and another one for DFP. It is probably possible to use the DFP command to limit the range other Logitech wheels too, but this is not supported by the official Logitech driver for Windows. The patch adds a sysfs interface which allows for the range to be set from userspace. - Fixed autocentering command All Logitech wheels support FF_AUTOCENTER effect. The original implementation in the lgff driver didn't work well with patch fixes it. According to USB communication sniffs the Formula Force EX (pretty much rebranded original Driving Force accept the generic autocentering command, this issue is also addressed by the patch There are still some features this patch doesn't cover, but since some of them will most likely require modifications of memless driver we have decided not to include them yet. As first we decided to move the handling of Logitech wheels from hid-lgff driver to hid-lg4ff driver (originally used fo At also adds PID of Logitech Driving Force GT. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-08-04 22:16:09 +08:00
/* Set supported force feedback capabilities */
for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
if (error)
return error;
/* Check if autocentering is available and
* set the centering force to zero by default */
if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
if (rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
else
dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
dev->ff->set_autocenter(dev, 0);
}
/* Get private driver data */
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Cannot add device, private driver data not allocated\n");
return -1;
}
/* Initialize device properties */
entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
if (!entry) {
hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
return -ENOMEM;
}
drv_data->device_props = entry;
entry->product_id = lg4ff_devices[i].product_id;
entry->min_range = lg4ff_devices[i].min_range;
entry->max_range = lg4ff_devices[i].max_range;
entry->set_range = lg4ff_devices[i].set_range;
/* Create sysfs interface */
error = device_create_file(&hid->dev, &dev_attr_range);
if (error)
return error;
dbg_hid("sysfs interface created\n");
/* Set the maximum range to start with */
entry->range = entry->max_range;
if (entry->set_range != NULL)
entry->set_range(hid, entry->range);
#ifdef CONFIG_LEDS_CLASS
/* register led subsystem - G27 only */
entry->led_state = 0;
for (j = 0; j < 5; j++)
entry->led[j] = NULL;
if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
struct led_classdev *led;
size_t name_sz;
char *name;
lg4ff_set_leds(hid, 0);
name_sz = strlen(dev_name(&hid->dev)) + 8;
for (j = 0; j < 5; j++) {
led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
if (!led) {
hid_err(hid, "can't allocate memory for LED %d\n", j);
goto err;
}
name = (void *)(&led[1]);
snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
led->name = name;
led->brightness = 0;
led->max_brightness = 1;
led->brightness_get = lg4ff_led_get_brightness;
led->brightness_set = lg4ff_led_set_brightness;
entry->led[j] = led;
error = led_classdev_register(&hid->dev, led);
if (error) {
hid_err(hid, "failed to register LED %d. Aborting.\n", j);
err:
/* Deregister LEDs (if any) */
for (j = 0; j < 5; j++) {
led = entry->led[j];
entry->led[j] = NULL;
if (!led)
continue;
led_classdev_unregister(led);
kfree(led);
}
goto out; /* Let the driver continue without LEDs */
}
}
}
out:
#endif
hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
return 0;
}
int lg4ff_deinit(struct hid_device *hid)
{
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
device_remove_file(&hid->dev, &dev_attr_range);
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
hid_err(hid, "Error while deinitializing device, no private driver data.\n");
return -1;
}
entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Error while deinitializing device, no device properties data.\n");
return -1;
}
#ifdef CONFIG_LEDS_CLASS
{
int j;
struct led_classdev *led;
/* Deregister LEDs (if any) */
for (j = 0; j < 5; j++) {
led = entry->led[j];
entry->led[j] = NULL;
if (!led)
continue;
led_classdev_unregister(led);
kfree(led);
}
}
#endif
/* Deallocate memory */
kfree(entry);
dbg_hid("Device successfully unregistered\n");
return 0;
}