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authorMichal Malý <madcatxster@gmail.com>2011-08-04 16:20:40 +0200
committerJiri Kosina <jkosina@suse.cz>2011-08-04 16:45:55 +0200
commit30bb75d71b3732c0adb6297815288ce0fb9cc04c (patch)
tree7666cc033dbf3a4239803b43702f2d4a57447a8e /drivers/hid/hid-lg4ff.c
parent96440c8a00e22e541135dee2eba9f3e7d8195f65 (diff)
downloadblackbird-op-linux-30bb75d71b3732c0adb6297815288ce0fb9cc04c.tar.gz
blackbird-op-linux-30bb75d71b3732c0adb6297815288ce0fb9cc04c.zip
HID: lg4ff - Add range setting support and sysfs interface
Wheel range of certain Logitech wheels - namely Driving Force GT, Driving Force Pro, G25 and G27 can be adjusted. Minimu is 40 degrees, maximum 900. DFGT, G25 and G27 all use a common command, DFP uses another one. Range can be set from userspace by writing to "/sys/module/hid_logitech/drivers/hid:logitech/<dev>range". The driver use list to store range of each connected wheel; it's not possible to use driver_data in hid_device struct as it's already b hig-lg driver. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-lg4ff.c')
-rw-r--r--drivers/hid/hid-lg4ff.c232
1 files changed, 220 insertions, 12 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 8eb938d7aa02..5c9eef2267ed 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -42,6 +42,29 @@
#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,
@@ -53,17 +76,18 @@ struct lg4ff_wheel {
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},
- {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270},
- {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900},
- {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900},
- {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900},
- {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900},
- {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270},
- {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270}
+ {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 {
@@ -106,8 +130,7 @@ static const struct lg4ff_usb_revision lg4ff_revs[] = {
{G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
};
-static int hid_lg4ff_play(struct input_dev *dev, void *data,
- struct ff_effect *effect)
+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;
@@ -151,6 +174,77 @@ static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude)
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;
@@ -166,6 +260,60 @@ static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_n
}
}
+/* 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 *entry = 0;
+ 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 *entry = 0;
+ 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);
@@ -173,7 +321,8 @@ int lg4ff_init(struct hid_device *hid)
struct input_dev *dev = hidinput->input;
struct hid_report *report;
struct hid_field *field;
- struct usb_device_descriptor *udesc = 0;
+ struct lg4ff_device_entry *entry;
+ struct usb_device_descriptor *udesc;
int error, i, j;
__u16 bcdDevice, rev_maj, rev_min;
@@ -195,7 +344,7 @@ int lg4ff_init(struct hid_device *hid)
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) {
@@ -244,7 +393,66 @@ int lg4ff_init(struct hid_device *hid)
if (test_bit(FF_AUTOCENTER, dev->ffbit))
dev->ff->set_autocenter = hid_lg4ff_set_autocenter;
+ /* 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 = (struct lg4ff_device_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 = (char *)kzalloc(strlen((&hid->dev)->kobj.name) + 1, GFP_KERNEL);
+ if (!entry->device_id) {
+ hid_err(hid, "Cannot set device_id, insufficient memory.\n");
+ return -ENOMEM;
+ }
+ strcpy(entry->device_id, (&hid->dev)->kobj.name);
+ 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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