Messages in this thread | | | Date | Tue, 13 Mar 2012 17:11:55 -0400 | Subject | Re: [PATCH 1/2] HID: hid-lg4ff add support for G27 LEDs | From | simon@mungewel ... |
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> Code snipet below (full file attached):
Whoops, wrong file attached. Simon./* * 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 <linux/leds.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);
#if 0 struct g27_leds { char * name; };
static struct g27_leds g27_leds[] = { #else static char * g27_leds[] = { #endif "g27:green:rpm1", "g27:green:rpm2", "g27:yellow:rpm3", "g27:yellow:rpm4", "g27:red:rpm5" };
struct lg4ff_device_entry { __u16 range; __u16 min_range; __u16 max_range; __u8 led_state; struct led_classdev *led[5]; void (*set_range)(struct hid_device *hid, u16 range); };
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 hid_device *hid = to_hid_device(dev); struct lg_drv_data *drv_data = (struct lg_drv_data *)hid_get_drvdata(hid); struct lg4ff_device_entry *uninitialized_var(entry); size_t count; if (!drv_data) { hid_err(hid, "Device data not found."); return 0; } entry = (struct lg4ff_device_entry *)drv_data->dev_props; if (!entry) { hid_err(hid, "Device properties 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 hid_device *hid = to_hid_device(dev); struct lg_drv_data* drv_data = (struct lg_drv_data *)hid_get_drvdata(hid); struct lg4ff_device_entry *uninitialized_var(entry); __u16 range = simple_strtoul(buf, NULL, 10);
if (!drv_data) { hid_err(hid, "Device data not found."); return count; }
entry = (struct lg4ff_device_entry *)drv_data->dev_props; if (!entry) { hid_err(hid, "Device properties 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; }
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);
report->field[0]->value[0] = 0xf8; report->field[0]->value[1] = 0x12; report->field[0]->value[2] = leds; report->field[0]->value[3] = 0x00; 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); }
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 = to_hid_device(dev); struct lg_drv_data* drv_data = (struct lg_drv_data *)hid_get_drvdata(hid); struct lg4ff_device_entry *uninitialized_var(entry); int i, state = 0;
if (!drv_data) { hid_err(hid, "Device data not found."); return; }
entry = (struct lg4ff_device_entry *)drv_data->dev_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 = to_hid_device(dev); struct lg_drv_data* drv_data = (struct lg_drv_data *)hid_get_drvdata(hid); struct lg4ff_device_entry *uninitialized_var(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->dev_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; }
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 lg_drv_data *drv_data; struct lg4ff_device_entry *entry; struct usb_device_descriptor *udesc; int error, i, j; __u16 bcdDevice, rev_maj, rev_min; struct led_classdev *led; struct device *dev2 = &dev->dev;
/* 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); }
/* 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->min_range = lg4ff_devices[i].min_range; entry->max_range = lg4ff_devices[i].max_range; entry->set_range = lg4ff_devices[i].set_range; drv_data = (struct lg_drv_data *)hid_get_drvdata(hid); drv_data->dev_props = entry;
/* Create sysfs interface for range */ error = device_create_file(&hid->dev, &dev_attr_range); if (error) return error; dbg_hid("sysfs interface created for range\n");
/* Set the maximum range to start with */ entry->range = entry->max_range; if (entry->set_range != NULL) entry->set_range(hid, entry->range);
/* register led subsystem - G27 only */ //if (rev_maj == G27_REV_MAJ && rev_min == G27_REV_MIN) { if (rev_maj != G27_REV_MAJ || rev_min != G27_REV_MIN) { for (i = 0; i < 5; i++) { led = kzalloc(sizeof(struct led_classdev), GFP_KERNEL); if (!led) { dev_err(dev2, "can't allocate memory for LED %d\n", i); error = -ENOMEM; goto err; } led->name = (void *)(g27_leds[i]); led->brightness = 0; led->max_brightness = 1; led->brightness_get = lg4ff_led_get_brightness; led->brightness_set = lg4ff_led_set_brightness;
entry->led[i] = led; #if 1 error = led_classdev_register(dev2, led); if (error) { dev_err(dev2, "can't register LED %d\n", i); goto err; } #endif }
dbg_hid("sysfs interface created for leds\n");
/* Turn off all leds */ entry->led_state = 0; lg4ff_set_leds(hid, 0); }
hid_info(hid, "Force feedback for Logitech with led subsys\n"); return 0;
err: /* Deregister LEDs (if any) */ for (i = 0; i < 5; i++) { led = entry->led[i]; entry->led[i] = NULL; if (!led) continue; led_classdev_unregister(led); kfree(led); }
return error; }
int lg4ff_deinit(struct hid_device *hid) { struct lg_drv_data *drv_data = (struct lg_drv_data *)drv_data; struct lg4ff_device_entry *uninitialized_var(entry); struct led_classdev *led; int i;
if (drv_data) { if (drv_data->dev_props) { entry = (struct lg4ff_device_entry *)drv_data->dev_props; if (entry) { /* Deregister LEDs (if any) */ for (i = 0; i < 5; i++) { led = entry->led[i]; entry->led[i] = NULL; if (!led) continue; led_classdev_unregister(led); kfree(led); } }
kfree(drv_data->dev_props); } }
device_remove_file(&hid->dev, &dev_attr_range);
dbg_hid("Device successfully unregistered\n"); return 0; } | |