[PATCH 08/12] HID: hid-lg4ff: Store pointer to the output HID report struct in the device entry struct.

From: Michal MalÃ
Date: Sat Mar 21 2015 - 07:50:34 EST

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This eliminates the need to look the HID report struct up every time it is needed.

Signed-off-by: Michal MalÃ <madcatxster@xxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-lg4ff.c | 67 +++++++++++++++++++++++--------------------------
1 file changed, 32 insertions(+), 35 deletions(-)

diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index 0bbdeea..fd6f140 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -90,6 +90,7 @@ struct lg4ff_wheel_data {

struct lg4ff_device_entry {
spinlock_t report_lock;
+ struct hid_report *report;
struct lg4ff_wheel_data wdata;
};

@@ -302,11 +303,9 @@ int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
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);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- s32 *value = report->field[0]->value;
+ s32 *value;
int x;
unsigned long flags;

@@ -321,6 +320,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
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)

@@ -340,7 +340,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
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;
}
@@ -353,7 +353,7 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
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;
}
@@ -365,11 +365,9 @@ static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effec
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);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- s32 *value = report->field[0]->value;
+ s32 *value;
u32 expand_a, expand_b;
unsigned long flags;

@@ -384,6 +382,7 @@ static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
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);
@@ -396,7 +395,7 @@ static void lg4ff_set_autocenter_default(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);
return;
}
@@ -427,7 +426,7 @@ static void lg4ff_set_autocenter_default(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);

/* Activate Auto-Center */
value[0] = 0x14;
@@ -438,7 +437,7 @@ static void lg4ff_set_autocenter_default(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);
}

@@ -446,12 +445,10 @@ static void lg4ff_set_autocenter_default(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);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
unsigned long flags;
- s32 *value = report->field[0]->value;
+ s32 *value;
magnitude = magnitude * 90 / 65535;

drv_data = hid_get_drvdata(hid);
@@ -465,6 +462,7 @@ static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
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;
@@ -475,18 +473,16 @@ static void 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 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);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- s32 *value = report->field[0]->value;
+ s32 *value;
unsigned long flags;

drv_data = hid_get_drvdata(hid);
@@ -500,6 +496,7 @@ static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
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);
@@ -511,19 +508,17 @@ static void 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 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;
int start_left, start_right, full_range;
- s32 *value = report->field[0]->value;
+ s32 *value;
unsigned long flags;

drv_data = hid_get_drvdata(hid);
@@ -537,6 +532,7 @@ static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
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);

spin_lock_irqsave(&entry->report_lock, flags);
@@ -550,13 +546,13 @@ static void 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;
@@ -568,7 +564,7 @@ static void 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;
}
@@ -583,7 +579,7 @@ static void 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);
}

@@ -646,11 +642,9 @@ 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);
struct lg4ff_device_entry *entry;
struct lg_drv_data *drv_data;
- s32 *value = report->field[0]->value;
+ s32 *value;
u8 i;
unsigned long flags;

@@ -665,6 +659,7 @@ static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct
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++) {
@@ -673,7 +668,7 @@ static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct
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);

@@ -915,11 +910,9 @@ 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)
{
- 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 lg_drv_data *drv_data = hid_get_drvdata(hid);
struct lg4ff_device_entry *entry;
- s32 *value = report->field[0]->value;
+ s32 *value;
unsigned long flags;

drv_data = hid_get_drvdata(hid);
@@ -933,6 +926,7 @@ static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
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;
@@ -942,7 +936,7 @@ 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);
}

@@ -1103,6 +1097,8 @@ 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);
struct lg4ff_device_entry *entry;
@@ -1124,6 +1120,7 @@ int lg4ff_init(struct hid_device *hid)
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
--
2.3.3

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Next message: Michal MalÃ: "[PATCH 06/12] HID: hid-lg: Check return values from lg[N]ff_init()"
Previous message: Michal MalÃ: "[PATCH 00/12] HID: hid-lg, hid-lg4ff: Mostly cleanup patches"
In reply to: Michal MalÃ: "[PATCH 10/12] HID: hid-lg4ff: Allow the driver to continue without sysfs interface."
Next in thread: Michal MalÃ: "[PATCH 06/12] HID: hid-lg: Check return values from lg[N]ff_init()"
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