| /* |
| * 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 = 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 usb_device_descriptor *udesc; |
| 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; |
| } |
| |
| /* 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; |
| |
| device_remove_file(&hid->dev, &dev_attr_range); |
| |
| 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) { |
| hid_err(hid, "Device entry not found!\n"); |
| return -1; |
| } |
| |
| dbg_hid("Device successfully unregistered\n"); |
| return 0; |
| } |