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path: root/drivers/hid/hid-lg4ff.c
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Diffstat (limited to 'drivers/hid/hid-lg4ff.c')
-rw-r--r--drivers/hid/hid-lg4ff.c458
1 files changed, 300 insertions, 158 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 1232210b1cc5..02cec83caac3 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -68,26 +68,32 @@
#define LG4FF_FFEX_REV_MAJ 0x21
#define LG4FF_FFEX_REV_MIN 0x00
-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);
-
-struct lg4ff_device_entry {
- __u32 product_id;
- __u16 range;
- __u16 min_range;
- __u16 max_range;
+static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
+static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
+
+struct lg4ff_wheel_data {
+ const u32 product_id;
+ u16 range;
+ const u16 min_range;
+ const u16 max_range;
#ifdef CONFIG_LEDS_CLASS
- __u8 led_state;
+ u8 led_state;
struct led_classdev *led[5];
#endif
- u32 alternate_modes;
- const char *real_tag;
- const char *real_name;
- u16 real_product_id;
- struct list_head list;
+ const u32 alternate_modes;
+ const char * const real_tag;
+ const char * const real_name;
+ const u16 real_product_id;
+
void (*set_range)(struct hid_device *hid, u16 range);
};
+struct lg4ff_device_entry {
+ spinlock_t report_lock; /* Protect output HID report */
+ struct hid_report *report;
+ struct lg4ff_wheel_data wdata;
+};
+
static const signed short lg4ff_wheel_effects[] = {
FF_CONSTANT,
FF_AUTOCENTER,
@@ -95,16 +101,16 @@ static const signed short lg4ff_wheel_effects[] = {
};
struct lg4ff_wheel {
- const __u32 product_id;
+ const u32 product_id;
const signed short *ff_effects;
- const __u16 min_range;
- const __u16 max_range;
+ const u16 min_range;
+ const u16 max_range;
void (*set_range)(struct hid_device *hid, u16 range);
};
struct lg4ff_compat_mode_switch {
- const __u8 cmd_count; /* Number of commands to send */
- const __u8 cmd[];
+ const u8 cmd_count; /* Number of commands to send */
+ const u8 cmd[];
};
struct lg4ff_wheel_ident_info {
@@ -134,10 +140,10 @@ struct lg4ff_alternate_mode {
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_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
+ {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
+ {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
+ {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, 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}
};
@@ -245,10 +251,10 @@ static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
};
/* Recalculates X axis value accordingly to currently selected range */
-static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
+static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
{
- __u16 max_range;
- __s32 new_value;
+ u16 max_range;
+ s32 new_value;
if (range == 900)
return value;
@@ -269,21 +275,21 @@ static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
}
int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
- struct hid_usage *usage, __s32 value, struct lg_drv_data *drv_data)
+ struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
{
struct lg4ff_device_entry *entry = drv_data->device_props;
- __s32 new_value = 0;
+ s32 new_value = 0;
if (!entry) {
hid_err(hid, "Device properties not found");
return 0;
}
- switch (entry->product_id) {
+ switch (entry->wdata.product_id) {
case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
switch (usage->code) {
case ABS_X:
- new_value = lg4ff_adjust_dfp_x_axis(value, entry->range);
+ new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
input_event(field->hidinput->input, usage->type, usage->code, new_value);
return 1;
default:
@@ -294,14 +300,56 @@ int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
}
}
-static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
+ const struct lg4ff_multimode_wheel *mmode_wheel,
+ const u16 real_product_id)
+{
+ u32 alternate_modes = 0;
+ const char *real_tag = NULL;
+ const char *real_name = NULL;
+
+ if (mmode_wheel) {
+ alternate_modes = mmode_wheel->alternate_modes;
+ real_tag = mmode_wheel->real_tag;
+ real_name = mmode_wheel->real_name;
+ }
+
+ {
+ struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
+ .real_product_id = real_product_id,
+ .min_range = wheel->min_range,
+ .max_range = wheel->max_range,
+ .set_range = wheel->set_range,
+ .alternate_modes = alternate_modes,
+ .real_tag = real_tag,
+ .real_name = real_name };
+
+ memcpy(wdata, &t_wdata, sizeof(t_wdata));
+ }
+}
+
+static int 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);
- __s32 *value = report->field[0]->value;
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
+ s32 *value;
int x;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return -EINVAL;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return -EINVAL;
+ }
+ value = entry->report->field[0]->value;
+
#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
switch (effect->type) {
@@ -309,6 +357,7 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
CLAMP(x);
+ spin_lock_irqsave(&entry->report_lock, flags);
if (x == 0x80) {
/* De-activate force in slot-1*/
value[0] = 0x13;
@@ -319,7 +368,8 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return 0;
}
@@ -331,7 +381,8 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
break;
}
return 0;
@@ -339,15 +390,16 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
/* 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)
+static void 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);
- __s32 *value = report->field[0]->value;
- __u32 expand_a, expand_b;
+ s32 *value = report->field[0]->value;
+ u32 expand_a, expand_b;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
+ unsigned long flags;
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
@@ -360,8 +412,10 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
hid_err(hid, "Device properties not found!\n");
return;
}
+ value = entry->report->field[0]->value;
/* De-activate Auto-Center */
+ spin_lock_irqsave(&entry->report_lock, flags);
if (magnitude == 0) {
value[0] = 0xf5;
value[1] = 0x00;
@@ -371,7 +425,8 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
@@ -384,7 +439,7 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
}
/* Adjust for non-MOMO wheels */
- switch (entry->product_id) {
+ switch (entry->wdata.product_id) {
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
break;
@@ -401,7 +456,7 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
/* Activate Auto-Center */
value[0] = 0x14;
@@ -412,18 +467,34 @@ static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitud
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends autocentering command compatible with Formula Force EX */
-static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
+static void 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);
- __s32 *value = report->field[0]->value;
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
+ s32 *value;
magnitude = magnitude * 90 / 65535;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+ value = entry->report->field[0]->value;
+
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xfe;
value[1] = 0x03;
value[2] = magnitude >> 14;
@@ -432,18 +503,33 @@ static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* 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)
+static void 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);
- __s32 *value = report->field[0]->value;
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
+ s32 *value;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+ value = entry->report->field[0]->value;
dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x81;
value[2] = range & 0x00ff;
@@ -452,20 +538,35 @@ static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
/* Sends commands to set range compatible with Driving Force Pro wheel */
-static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
+static void 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);
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
int start_left, start_right, full_range;
- __s32 *value = report->field[0]->value;
+ s32 *value;
+
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+ value = entry->report->field[0]->value;
dbg_hid("Driving Force Pro: setting range to %u\n", range);
/* Prepare "coarse" limit command */
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x00; /* Set later */
value[2] = 0x00;
@@ -475,13 +576,13 @@ static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
value[6] = 0x00;
if (range > 200) {
- report->field[0]->value[1] = 0x03;
+ value[1] = 0x03;
full_range = 900;
} else {
- report->field[0]->value[1] = 0x02;
+ value[1] = 0x02;
full_range = 200;
}
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
/* Prepare "fine" limit command */
value[0] = 0x81;
@@ -493,7 +594,8 @@ static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
value[6] = 0x00;
if (range == 200 || range == 900) { /* Do not apply any fine limit */
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
return;
}
@@ -507,7 +609,8 @@ static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
value[6] = 0xff;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
@@ -569,19 +672,35 @@ static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(cons
static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
{
- 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);
- __s32 *value = report->field[0]->value;
+ struct lg4ff_device_entry *entry;
+ struct lg_drv_data *drv_data;
+ unsigned long flags;
+ s32 *value;
u8 i;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return -EINVAL;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return -EINVAL;
+ }
+ value = entry->report->field[0]->value;
+
+ spin_lock_irqsave(&entry->report_lock, flags);
for (i = 0; i < s->cmd_count; i++) {
u8 j;
for (j = 0; j < 7; j++)
value[j] = s->cmd[j + (7*i)];
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
}
+ spin_unlock_irqrestore(&entry->report_lock, flags);
hid_hw_wait(hid);
return 0;
}
@@ -606,23 +725,23 @@ static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attr
return 0;
}
- if (!entry->real_name) {
+ if (!entry->wdata.real_name) {
hid_err(hid, "NULL pointer to string\n");
return 0;
}
for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
- if (entry->alternate_modes & BIT(i)) {
+ if (entry->wdata.alternate_modes & BIT(i)) {
/* Print tag and full name */
count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
lg4ff_alternate_modes[i].tag,
- !lg4ff_alternate_modes[i].product_id ? entry->real_name : lg4ff_alternate_modes[i].name);
+ !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
if (count >= PAGE_SIZE - 1)
return count;
/* Mark the currently active mode with an asterisk */
- if (lg4ff_alternate_modes[i].product_id == entry->product_id ||
- (lg4ff_alternate_modes[i].product_id == 0 && entry->product_id == entry->real_product_id))
+ if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
+ (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
else
count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
@@ -675,10 +794,10 @@ static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_att
const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
const char *tag = lg4ff_alternate_modes[i].tag;
- if (entry->alternate_modes & BIT(i)) {
+ if (entry->wdata.alternate_modes & BIT(i)) {
if (!strcmp(tag, lbuf)) {
if (!mode_product_id)
- target_product_id = entry->real_product_id;
+ target_product_id = entry->wdata.real_product_id;
else
target_product_id = mode_product_id;
break;
@@ -693,24 +812,24 @@ static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_att
}
kfree(lbuf); /* Not needed anymore */
- if (target_product_id == entry->product_id) /* Nothing to do */
+ if (target_product_id == entry->wdata.product_id) /* Nothing to do */
return count;
/* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
hid_info(hid, "\"%s\" cannot be switched to \"DF-EX\" mode. Load the \"hid_logitech\" module with \"lg4ff_no_autoswitch=1\" parameter set and try again\n",
- entry->real_name);
+ entry->wdata.real_name);
return -EINVAL;
}
/* Take care of hardware limitations */
- if ((entry->real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
- entry->product_id > target_product_id) {
- hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->real_name, lg4ff_alternate_modes[i].name);
+ if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
+ entry->wdata.product_id > target_product_id) {
+ hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
return -EINVAL;
}
- s = lg4ff_get_mode_switch_command(entry->real_product_id, target_product_id);
+ s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
if (!s) {
hid_err(hid, "Invalid target product ID %X\n", target_product_id);
return -EINVAL;
@@ -721,9 +840,9 @@ static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_att
}
static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
-/* Read current range and display it in terminal */
-static ssize_t range_show(struct device *dev, struct device_attribute *attr,
- char *buf)
+/* Export the currently set range of the wheel */
+static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct hid_device *hid = to_hid_device(dev);
struct lg4ff_device_entry *entry;
@@ -742,19 +861,19 @@ static ssize_t range_show(struct device *dev, struct device_attribute *attr,
return 0;
}
- count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
+ count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
return count;
}
/* Set range to user specified value, call appropriate function
* according to the type of the wheel */
-static ssize_t range_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
+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 lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- __u16 range = simple_strtoul(buf, NULL, 10);
+ u16 range = simple_strtoul(buf, NULL, 10);
drv_data = hid_get_drvdata(hid);
if (!drv_data) {
@@ -769,18 +888,18 @@ static ssize_t range_store(struct device *dev, struct device_attribute *attr,
}
if (range == 0)
- range = entry->max_range;
+ range = entry->wdata.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;
+ if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
+ entry->wdata.set_range(hid, range);
+ entry->wdata.range = range;
}
return count;
}
-static DEVICE_ATTR_RW(range);
+static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -801,12 +920,12 @@ static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *a
return 0;
}
- if (!entry->real_tag || !entry->real_name) {
+ if (!entry->wdata.real_tag || !entry->wdata.real_name) {
hid_err(hid, "NULL pointer to string\n");
return 0;
}
- count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->real_tag, entry->real_name);
+ count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
return count;
}
@@ -818,12 +937,27 @@ static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *
static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
#ifdef CONFIG_LEDS_CLASS
-static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
+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);
- __s32 *value = report->field[0]->value;
+ struct lg_drv_data *drv_data;
+ struct lg4ff_device_entry *entry;
+ unsigned long flags;
+ s32 *value;
+
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Private driver data not found!\n");
+ return;
+ }
+
+ entry = drv_data->device_props;
+ if (!entry) {
+ hid_err(hid, "Device properties not found!\n");
+ return;
+ }
+ value = entry->report->field[0]->value;
+ spin_lock_irqsave(&entry->report_lock, flags);
value[0] = 0xf8;
value[1] = 0x12;
value[2] = leds;
@@ -831,7 +965,8 @@ static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
value[4] = 0x00;
value[5] = 0x00;
value[6] = 0x00;
- hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+ hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
+ spin_unlock_irqrestore(&entry->report_lock, flags);
}
static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
@@ -848,7 +983,7 @@ static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
return;
}
- entry = (struct lg4ff_device_entry *)drv_data->device_props;
+ entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found.");
@@ -856,15 +991,15 @@ static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
}
for (i = 0; i < 5; i++) {
- if (led_cdev != entry->led[i])
+ if (led_cdev != entry->wdata.led[i])
continue;
- state = (entry->led_state >> i) & 1;
+ state = (entry->wdata.led_state >> i) & 1;
if (value == LED_OFF && state) {
- entry->led_state &= ~(1 << i);
- lg4ff_set_leds(hid, entry->led_state);
+ entry->wdata.led_state &= ~(1 << i);
+ lg4ff_set_leds(hid, entry->wdata.led_state);
} else if (value != LED_OFF && !state) {
- entry->led_state |= 1 << i;
- lg4ff_set_leds(hid, entry->led_state);
+ entry->wdata.led_state |= 1 << i;
+ lg4ff_set_leds(hid, entry->wdata.led_state);
}
break;
}
@@ -883,7 +1018,7 @@ static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cde
return LED_OFF;
}
- entry = (struct lg4ff_device_entry *)drv_data->device_props;
+ entry = drv_data->device_props;
if (!entry) {
hid_err(hid, "Device properties not found.");
@@ -891,8 +1026,8 @@ static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cde
}
for (i = 0; i < 5; i++)
- if (led_cdev == entry->led[i]) {
- value = (entry->led_state >> i) & 1;
+ if (led_cdev == entry->wdata.led[i]) {
+ value = (entry->wdata.led_state >> i) & 1;
break;
}
@@ -991,8 +1126,11 @@ int lg4ff_init(struct hid_device *hid)
{
struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
struct input_dev *dev = hidinput->input;
+ 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);
const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
+ const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
int error, i, j;
@@ -1003,6 +1141,18 @@ int lg4ff_init(struct hid_device *hid)
if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
return -1;
+ drv_data = hid_get_drvdata(hid);
+ if (!drv_data) {
+ hid_err(hid, "Cannot add device, private driver data not allocated\n");
+ return -1;
+ }
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return -ENOMEM;
+ spin_lock_init(&entry->report_lock);
+ entry->report = report;
+ drv_data->device_props = entry;
+
/* Check if a multimode wheel has been connected and
* handle it appropriately */
mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
@@ -1012,6 +1162,11 @@ int lg4ff_init(struct hid_device *hid)
*/
if (mmode_ret == LG4FF_MMODE_SWITCHED)
return 0;
+ else if (mmode_ret < 0) {
+ hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
+ error = mmode_ret;
+ goto err_init;
+ }
/* Check what wheel has been connected */
for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
@@ -1022,9 +1177,11 @@ int lg4ff_init(struct hid_device *hid)
}
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;
+ hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
+ "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
+ "Michal Maly <madcatxster@devoid-pointer.net>\n");
+ error = -1;
+ goto err_init;
}
if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
@@ -1035,7 +1192,8 @@ int lg4ff_init(struct hid_device *hid)
if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
- return -1;
+ error = -1;
+ goto err_init;
}
}
@@ -1043,37 +1201,17 @@ int lg4ff_init(struct hid_device *hid)
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);
+ error = input_ff_create_memless(dev, NULL, lg4ff_play);
if (error)
- return error;
-
- /* Get private driver data */
- drv_data = hid_get_drvdata(hid);
- if (!drv_data) {
- hid_err(hid, "Cannot add device, private driver data not allocated\n");
- return -1;
- }
+ goto err_init;
/* Initialize device properties */
- entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
- if (!entry) {
- hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
- return -ENOMEM;
- }
- drv_data->device_props = entry;
-
- entry->product_id = lg4ff_devices[i].product_id;
- entry->real_product_id = real_product_id;
- entry->min_range = lg4ff_devices[i].min_range;
- entry->max_range = lg4ff_devices[i].max_range;
- entry->set_range = lg4ff_devices[i].set_range;
if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
BUG_ON(mmode_idx == -1);
- entry->alternate_modes = lg4ff_multimode_wheels[mmode_idx].alternate_modes;
- entry->real_tag = lg4ff_multimode_wheels[mmode_idx].real_tag;
- entry->real_name = lg4ff_multimode_wheels[mmode_idx].real_name;
+ mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
}
+ lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
/* Check if autocentering is available and
* set the centering force to zero by default */
@@ -1081,9 +1219,9 @@ int lg4ff_init(struct hid_device *hid)
/* Formula Force EX expects different autocentering command */
if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
(bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
- dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
+ dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
else
- dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
+ dev->ff->set_autocenter = lg4ff_set_autocenter_default;
dev->ff->set_autocenter(dev, 0);
}
@@ -1091,27 +1229,27 @@ int lg4ff_init(struct hid_device *hid)
/* Create sysfs interface */
error = device_create_file(&hid->dev, &dev_attr_range);
if (error)
- return error;
+ hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
error = device_create_file(&hid->dev, &dev_attr_real_id);
if (error)
- return error;
+ hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
if (error)
- return error;
+ hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", 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);
+ entry->wdata.range = entry->wdata.max_range;
+ if (entry->wdata.set_range)
+ entry->wdata.set_range(hid, entry->wdata.range);
#ifdef CONFIG_LEDS_CLASS
/* register led subsystem - G27 only */
- entry->led_state = 0;
+ entry->wdata.led_state = 0;
for (j = 0; j < 5; j++)
- entry->led[j] = NULL;
+ entry->wdata.led[j] = NULL;
if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
struct led_classdev *led;
@@ -1126,7 +1264,7 @@ int lg4ff_init(struct hid_device *hid)
led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
if (!led) {
hid_err(hid, "can't allocate memory for LED %d\n", j);
- goto err;
+ goto err_leds;
}
name = (void *)(&led[1]);
@@ -1137,16 +1275,16 @@ int lg4ff_init(struct hid_device *hid)
led->brightness_get = lg4ff_led_get_brightness;
led->brightness_set = lg4ff_led_set_brightness;
- entry->led[j] = led;
+ entry->wdata.led[j] = led;
error = led_classdev_register(&hid->dev, led);
if (error) {
hid_err(hid, "failed to register LED %d. Aborting.\n", j);
-err:
+err_leds:
/* Deregister LEDs (if any) */
for (j = 0; j < 5; j++) {
- led = entry->led[j];
- entry->led[j] = NULL;
+ led = entry->wdata.led[j];
+ entry->wdata.led[j] = NULL;
if (!led)
continue;
led_classdev_unregister(led);
@@ -1160,6 +1298,11 @@ out:
#endif
hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
return 0;
+
+err_init:
+ drv_data->device_props = NULL;
+ kfree(entry);
+ return error;
}
int lg4ff_deinit(struct hid_device *hid)
@@ -1176,14 +1319,13 @@ int lg4ff_deinit(struct hid_device *hid)
if (!entry)
goto out; /* Nothing more to do */
- device_remove_file(&hid->dev, &dev_attr_range);
-
/* Multimode devices will have at least the "MODE_NATIVE" bit set */
- if (entry->alternate_modes) {
+ if (entry->wdata.alternate_modes) {
device_remove_file(&hid->dev, &dev_attr_real_id);
device_remove_file(&hid->dev, &dev_attr_alternate_modes);
}
+ device_remove_file(&hid->dev, &dev_attr_range);
#ifdef CONFIG_LEDS_CLASS
{
int j;
@@ -1192,8 +1334,8 @@ int lg4ff_deinit(struct hid_device *hid)
/* Deregister LEDs (if any) */
for (j = 0; j < 5; j++) {
- led = entry->led[j];
- entry->led[j] = NULL;
+ led = entry->wdata.led[j];
+ entry->wdata.led[j] = NULL;
if (!led)
continue;
led_classdev_unregister(led);
@@ -1201,10 +1343,10 @@ int lg4ff_deinit(struct hid_device *hid)
}
}
#endif
+ hid_hw_stop(hid);
+ drv_data->device_props = NULL;
- /* Deallocate memory */
kfree(entry);
-
out:
dbg_hid("Device successfully unregistered\n");
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.