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HID: hid-lg4ff: Export the real wheel model and supported alternate modes
Display the real wheel model and supported alternate modes through sysfs. This applies only to multimode wheels. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Tested-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Michal Malý
Jiri Kosina
parent
e7c234496d
commit
b96d23ec69
@ -5,3 +5,23 @@ Contact: Michal Malý <madcatxster@gmail.com>
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Description: Display minimum, maximum and current range of the steering
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wheel. Writing a value within min and max boundaries sets the
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range of the wheel.
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What: /sys/bus/hid/drivers/logitech/<dev>/alternate_modes
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Date: Feb 2015
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KernelVersion: 4.1
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Contact: Michal Malý <madcatxster@gmail.com>
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Description: Displays a set of alternate modes supported by a wheel. Each
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mode is listed as follows:
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Tag: Mode Name
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Currently active mode is marked with an asterisk. List also
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contains an abstract item "native" which always denotes the
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native mode of the wheel.
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What: /sys/bus/hid/drivers/logitech/<dev>/real_id
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Date: Feb 2015
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KernelVersion: 4.1
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Contact: Michal Malý <madcatxster@gmail.com>
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Description: Displays the real model of the wheel regardless of any
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alternate mode the wheel might be switched to.
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It is a read-only value.
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This entry is not created for devices that have only one mode.
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@ -34,10 +34,36 @@
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#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
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#define LG4FF_MMODE_DONE 0
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#define LG4FF_MMODE_IS_MULTIMODE 0
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#define LG4FF_MMODE_SWITCHED 1
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#define LG4FF_MMODE_NOT_MULTIMODE 2
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#define LG4FF_MODE_NATIVE_IDX 0
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#define LG4FF_MODE_DFEX_IDX 1
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#define LG4FF_MODE_DFP_IDX 2
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#define LG4FF_MODE_G25_IDX 3
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#define LG4FF_MODE_DFGT_IDX 4
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#define LG4FF_MODE_G27_IDX 5
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#define LG4FF_MODE_MAX_IDX 6
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#define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
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#define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
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#define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
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#define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
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#define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
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#define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
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#define LG4FF_DFEX_TAG "DF-EX"
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#define LG4FF_DFEX_NAME "Driving Force / Formula EX"
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#define LG4FF_DFP_TAG "DFP"
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#define LG4FF_DFP_NAME "Driving Force Pro"
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#define LG4FF_G25_TAG "G25"
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#define LG4FF_G25_NAME "G25 Racing Wheel"
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#define LG4FF_G27_TAG "G27"
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#define LG4FF_G27_NAME "G27 Racing Wheel"
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#define LG4FF_DFGT_TAG "DFGT"
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#define LG4FF_DFGT_NAME "Driving Force GT"
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#define LG4FF_FFEX_REV_MAJ 0x21
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#define LG4FF_FFEX_REV_MIN 0x00
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@ -53,6 +79,10 @@ struct lg4ff_device_entry {
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__u8 led_state;
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struct led_classdev *led[5];
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#endif
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u32 alternate_modes;
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const char *real_tag;
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const char *real_name;
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u16 real_product_id;
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struct list_head list;
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void (*set_range)(struct hid_device *hid, u16 range);
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};
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@ -87,6 +117,19 @@ struct lg4ff_wheel_ident_checklist {
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const struct lg4ff_wheel_ident_info *models[];
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};
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struct lg4ff_multimode_wheel {
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const u16 product_id;
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const u32 alternate_modes;
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const char *real_tag;
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const char *real_name;
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};
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struct lg4ff_alternate_mode {
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const u16 product_id;
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const char *tag;
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const char *name;
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};
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static const struct lg4ff_wheel lg4ff_devices[] = {
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{USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
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{USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
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@ -98,6 +141,30 @@ static const struct lg4ff_wheel lg4ff_devices[] = {
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{USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
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};
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static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
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{USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
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LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
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LG4FF_DFP_TAG, LG4FF_DFP_NAME},
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{USB_DEVICE_ID_LOGITECH_G25_WHEEL,
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LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
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LG4FF_G25_TAG, LG4FF_G25_NAME},
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{USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
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LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
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LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
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{USB_DEVICE_ID_LOGITECH_G27_WHEEL,
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LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
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LG4FF_G27_TAG, LG4FF_G27_NAME},
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};
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static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
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[LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
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[LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
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[LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
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[LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
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[LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
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[LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME}
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};
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/* Multimode wheel identificators */
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static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
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0xf000,
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@ -439,6 +506,61 @@ static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct
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return 0;
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}
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static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hid_device *hid = to_hid_device(dev);
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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ssize_t count = 0;
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int i;
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drv_data = hid_get_drvdata(hid);
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if (!drv_data) {
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hid_err(hid, "Private driver data not found!\n");
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return 0;
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}
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entry = drv_data->device_props;
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if (!entry) {
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hid_err(hid, "Device properties not found!\n");
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return 0;
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}
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if (!entry->real_name) {
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hid_err(hid, "NULL pointer to string\n");
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return 0;
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}
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for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
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if (entry->alternate_modes & BIT(i)) {
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/* Print tag and full name */
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count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
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lg4ff_alternate_modes[i].tag,
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!lg4ff_alternate_modes[i].product_id ? entry->real_name : lg4ff_alternate_modes[i].name);
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if (count >= PAGE_SIZE - 1)
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return count;
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/* Mark the currently active mode with an asterisk */
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if (lg4ff_alternate_modes[i].product_id == entry->product_id ||
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(lg4ff_alternate_modes[i].product_id == 0 && entry->product_id == entry->real_product_id))
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count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
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else
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count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
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if (count >= PAGE_SIZE - 1)
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return count;
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}
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}
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return count;
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}
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static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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return -ENOSYS;
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}
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static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
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/* Read current range and display it in terminal */
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static ssize_t range_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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@ -500,6 +622,41 @@ static ssize_t range_store(struct device *dev, struct device_attribute *attr,
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}
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static DEVICE_ATTR_RW(range);
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static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct hid_device *hid = to_hid_device(dev);
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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size_t count;
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drv_data = hid_get_drvdata(hid);
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if (!drv_data) {
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hid_err(hid, "Private driver data not found!\n");
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return 0;
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}
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entry = drv_data->device_props;
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if (!entry) {
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hid_err(hid, "Device properties not found!\n");
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return 0;
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}
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if (!entry->real_tag || !entry->real_name) {
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hid_err(hid, "NULL pointer to string\n");
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return 0;
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}
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count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->real_tag, entry->real_name);
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return count;
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}
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static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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/* Real ID is a read-only value */
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return -EPERM;
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}
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static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
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#ifdef CONFIG_LEDS_CLASS
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static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
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{
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@ -664,7 +821,7 @@ static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_produc
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break;
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default:
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hid_err(hid, "Invalid product id %X\n", *real_product_id);
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return LG4FF_MMODE_DONE;
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return LG4FF_MMODE_NOT_MULTIMODE;
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}
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ret = lg4ff_switch_compatibility_mode(hid, s);
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@ -672,12 +829,12 @@ static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_produc
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/* Wheel could not have been switched to native mode,
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* leave it in "Driving Force" mode and continue */
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hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
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return LG4FF_MMODE_DONE;
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return LG4FF_MMODE_IS_MULTIMODE;
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}
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return LG4FF_MMODE_SWITCHED;
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}
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return LG4FF_MMODE_DONE;
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return LG4FF_MMODE_IS_MULTIMODE;
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}
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@ -689,7 +846,8 @@ int lg4ff_init(struct hid_device *hid)
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const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
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struct lg4ff_device_entry *entry;
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struct lg_drv_data *drv_data;
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int error, i, j, ret;
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int error, i, j;
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int mmode_ret, mmode_idx = -1;
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u16 real_product_id;
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/* Check that the report looks ok */
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@ -698,12 +856,12 @@ int lg4ff_init(struct hid_device *hid)
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/* Check if a multimode wheel has been connected and
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* handle it appropriately */
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ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
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mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
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/* Wheel has been told to switch to native mode. There is no point in going on
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* with the initialization as the wheel will do a USB reset when it switches mode
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*/
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if (ret == LG4FF_MMODE_SWITCHED)
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if (mmode_ret == LG4FF_MMODE_SWITCHED)
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return 0;
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/* Check what wheel has been connected */
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@ -720,6 +878,18 @@ int lg4ff_init(struct hid_device *hid)
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return -1;
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}
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if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
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for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
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if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
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break;
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}
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if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
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hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
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return -1;
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}
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}
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/* Set supported force feedback capabilities */
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for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
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set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
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@ -745,9 +915,16 @@ int lg4ff_init(struct hid_device *hid)
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drv_data->device_props = entry;
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entry->product_id = lg4ff_devices[i].product_id;
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entry->real_product_id = real_product_id;
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entry->min_range = lg4ff_devices[i].min_range;
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entry->max_range = lg4ff_devices[i].max_range;
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entry->set_range = lg4ff_devices[i].set_range;
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if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
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BUG_ON(mmode_idx == -1);
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entry->alternate_modes = lg4ff_multimode_wheels[mmode_idx].alternate_modes;
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entry->real_tag = lg4ff_multimode_wheels[mmode_idx].real_tag;
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entry->real_name = lg4ff_multimode_wheels[mmode_idx].real_name;
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}
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/* Check if autocentering is available and
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* set the centering force to zero by default */
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@ -766,6 +943,14 @@ int lg4ff_init(struct hid_device *hid)
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error = device_create_file(&hid->dev, &dev_attr_range);
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if (error)
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return error;
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if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
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error = device_create_file(&hid->dev, &dev_attr_real_id);
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if (error)
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return error;
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error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
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if (error)
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return error;
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}
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dbg_hid("sysfs interface created\n");
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/* Set the maximum range to start with */
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@ -844,6 +1029,12 @@ int lg4ff_deinit(struct hid_device *hid)
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device_remove_file(&hid->dev, &dev_attr_range);
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/* Multimode devices will have at least the "MODE_NATIVE" bit set */
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if (entry->alternate_modes) {
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device_remove_file(&hid->dev, &dev_attr_real_id);
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device_remove_file(&hid->dev, &dev_attr_alternate_modes);
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}
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#ifdef CONFIG_LEDS_CLASS
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{
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int j;
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