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- /*
- * Force feedback support for Logitech Speed Force Wireless
- *
- * http://wiibrew.org/wiki/Logitech_USB_steering_wheel
- *
- * 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"
- #include "hid-ids.h"
- #define DFGT_REV_MAJ 0x13
- #define DFGT_REV_MIN 0x22
- #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);
- static bool list_inited;
- struct lg4ff_device_entry {
- char *device_id; /* Use name in respective kobject structure's address as the ID */
- __u16 range;
- __u16 min_range;
- __u16 max_range;
- __u8 leds;
- struct list_head list;
- void (*set_range)(struct hid_device *hid, u16 range);
- };
- static struct lg4ff_device_entry device_list;
- static const signed short lg4ff_wheel_effects[] = {
- FF_CONSTANT,
- FF_AUTOCENTER,
- -1
- };
- 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);
- };
- 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}
- };
- 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 */
- {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 */
- };
- 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);
- int x;
- #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
- switch (effect->type) {
- case FF_CONSTANT:
- x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
- CLAMP(x);
- report->field[0]->value[0] = 0x11; /* Slot 1 */
- report->field[0]->value[1] = 0x08;
- report->field[0]->value[2] = x;
- report->field[0]->value[3] = 0x80;
- report->field[0]->value[4] = 0x00;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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);
- report->field[0]->value[0] = 0xfe;
- report->field[0]->value[1] = 0x0d;
- report->field[0]->value[2] = magnitude >> 13;
- report->field[0]->value[3] = magnitude >> 13;
- report->field[0]->value[4] = magnitude >> 8;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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);
- magnitude = magnitude * 90 / 65535;
-
- report->field[0]->value[0] = 0xfe;
- report->field[0]->value[1] = 0x03;
- report->field[0]->value[2] = magnitude >> 14;
- report->field[0]->value[3] = magnitude >> 14;
- report->field[0]->value[4] = magnitude;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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);
- dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
- report->field[0]->value[0] = 0xf8;
- report->field[0]->value[1] = 0x81;
- report->field[0]->value[2] = range & 0x00ff;
- report->field[0]->value[3] = (range & 0xff00) >> 8;
- report->field[0]->value[4] = 0x00;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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;
- dbg_hid("Driving Force Pro: setting range to %u\n", range);
- /* Prepare "coarse" limit command */
- report->field[0]->value[0] = 0xf8;
- report->field[0]->value[1] = 0x00; /* Set later */
- report->field[0]->value[2] = 0x00;
- report->field[0]->value[3] = 0x00;
- report->field[0]->value[4] = 0x00;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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 */
- report->field[0]->value[0] = 0x81;
- report->field[0]->value[1] = 0x0b;
- report->field[0]->value[2] = 0x00;
- report->field[0]->value[3] = 0x00;
- report->field[0]->value[4] = 0x00;
- report->field[0]->value[5] = 0x00;
- report->field[0]->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;
- report->field[0]->value[2] = start_left >> 4;
- report->field[0]->value[3] = start_right >> 4;
- report->field[0]->value[4] = 0xff;
- report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
- report->field[0]->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 lg4ff_device_entry *uninitialized_var(entry);
- struct list_head *h;
- struct hid_device *hid = to_hid_device(dev);
- size_t count;
- list_for_each(h, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
- break;
- }
- if (h == &device_list.list) {
- dbg_hid("Device not found!");
- 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 lg4ff_device_entry *uninitialized_var(entry);
- struct list_head *h;
- struct hid_device *hid = to_hid_device(dev);
- __u16 range = simple_strtoul(buf, NULL, 10);
- list_for_each(h, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
- break;
- }
- if (h == &device_list.list) {
- dbg_hid("Device not found!");
- return count;
- }
- 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;
- }
- int lg4ff_init(struct hid_device *hid)
- {
- struct hid_input *hidinput;
- struct input_dev *dev;
- struct lg4ff_device_entry *entry;
- struct usb_device_descriptor *udesc;
- int error, i, j;
- __u16 bcdDevice, rev_maj, rev_min;
- if (list_empty(&hid->inputs)) {
- hid_err(hid, "no inputs found\n");
- return -ENODEV;
- }
- hidinput = list_entry(hid->inputs.next, struct hid_input, list);
- dev = hidinput->input;
- /* Check that the report looks ok */
- if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
- return -1;
- /* 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");
- }
- }
- }
- /* 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);
- }
- /* Initialize device_list if this is the first device to handle by lg4ff */
- if (!list_inited) {
- INIT_LIST_HEAD(&device_list.list);
- list_inited = 1;
- }
- /* Add the device to device_list */
- entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
- if (!entry) {
- hid_err(hid, "Cannot add device, insufficient memory.\n");
- return -ENOMEM;
- }
- entry->device_id = kstrdup((&hid->dev)->kobj.name, GFP_KERNEL);
- if (!entry->device_id) {
- hid_err(hid, "Cannot set device_id, insufficient memory.\n");
- kfree(entry);
- return -ENOMEM;
- }
- entry->min_range = lg4ff_devices[i].min_range;
- entry->max_range = lg4ff_devices[i].max_range;
- entry->set_range = lg4ff_devices[i].set_range;
- list_add(&entry->list, &device_list.list);
- /* 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);
- hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
- return 0;
- }
- int lg4ff_deinit(struct hid_device *hid)
- {
- bool found = 0;
- struct lg4ff_device_entry *entry;
- struct list_head *h, *g;
- list_for_each_safe(h, g, &device_list.list) {
- entry = list_entry(h, struct lg4ff_device_entry, list);
- if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) {
- list_del(h);
- kfree(entry->device_id);
- kfree(entry);
- found = 1;
- break;
- }
- }
- if (!found) {
- dbg_hid("Device entry not found!\n");
- return -1;
- }
- device_remove_file(&hid->dev, &dev_attr_range);
- dbg_hid("Device successfully unregistered\n");
- return 0;
- }
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