[PATCH 2/2] HID: samsung: Object size reduction and neatening
From: Joe Perches
Date: Wed Jan 31 2024 - 15:23:13 EST
Use a switch/case in samsung_input_mapping to reduce object size.
$ size drivers/hid/hid-samsung.o*
text data bss dec hex filename
2842 432 0 3274 cca drivers/hid/hid-samsung.o.new
3203 440 0 3643 e3b drivers/hid/hid-samsung.o.old
Miscellaneous style neatening:
o Use unsigned int instead of unsigned
o Alignment to open parenthesis
o Line wrapping
Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
drivers/hid/hid-samsung.c | 166 +++++++++++++++++++++-----------------
1 file changed, 94 insertions(+), 72 deletions(-)
diff --git a/drivers/hid/hid-samsung.c b/drivers/hid/hid-samsung.c
index d701dd3a914e7..63c18b9b8279f 100644
--- a/drivers/hid/hid-samsung.c
+++ b/drivers/hid/hid-samsung.c
@@ -49,31 +49,35 @@
* Report #3 has an array field with logical range 0..1 instead of 1..3.
*/
static inline void samsung_irda_dev_trace(struct hid_device *hdev,
- unsigned int rsize)
+ unsigned int rsize)
{
hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n",
rsize);
}
static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int *rsize)
+ unsigned int *rsize)
{
- if (*rsize == 184 && !memcmp(&rdesc[175], "\x25\x40\x75\x30\x95\x01", 6) &&
- rdesc[182] == 0x40) {
+ if (*rsize == 184 &&
+ !memcmp(&rdesc[175], "\x25\x40\x75\x30\x95\x01", 6) &&
+ rdesc[182] == 0x40) {
samsung_irda_dev_trace(hdev, 184);
rdesc[176] = 0xff;
rdesc[178] = 0x08;
rdesc[180] = 0x06;
rdesc[182] = 0x42;
- } else if (*rsize == 203 && !memcmp(&rdesc[192], "\x15\x00\x25\x12", 4)) {
+ } else if (*rsize == 203 &&
+ !memcmp(&rdesc[192], "\x15\x00\x25\x12", 4)) {
samsung_irda_dev_trace(hdev, 203);
rdesc[193] = 0x01;
rdesc[195] = 0x0f;
- } else if (*rsize == 135 && !memcmp(&rdesc[124], "\x15\x00\x25\x11", 4)) {
+ } else if (*rsize == 135 &&
+ !memcmp(&rdesc[124], "\x15\x00\x25\x11", 4)) {
samsung_irda_dev_trace(hdev, 135);
rdesc[125] = 0x01;
rdesc[127] = 0x0e;
- } else if (*rsize == 171 && !memcmp(&rdesc[160], "\x15\x00\x25\x01", 4)) {
+ } else if (*rsize == 171 &&
+ !memcmp(&rdesc[160], "\x15\x00\x25\x01", 4)) {
samsung_irda_dev_trace(hdev, 171);
rdesc[161] = 0x01;
rdesc[163] = 0x03;
@@ -82,19 +86,21 @@ static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
}
struct key_clear_map {
- unsigned use;
+ unsigned int use;
__u16 kb;
};
static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
int i;
- unsigned use;
- unsigned up = usage->hid & HID_USAGE_PAGE;
+ unsigned int use;
+ unsigned int up = usage->hid & HID_USAGE_PAGE;
static const struct key_clear_map kcm[] = {
{ 0x183, KEY_MEDIA },
{ 0x195, KEY_EMAIL },
@@ -129,12 +135,14 @@ static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
}
static int samsung_kbd_input_mapping(struct hid_device *hdev,
- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
int i;
- unsigned use;
- unsigned up = usage->hid & HID_USAGE_PAGE;
+ unsigned int use;
+ unsigned int up = usage->hid & HID_USAGE_PAGE;
if (!(up == HID_UP_CONSUMER || up == HID_UP_KEYBOARD))
return 0;
@@ -193,12 +201,14 @@ static int samsung_kbd_input_mapping(struct hid_device *hdev,
}
static int samsung_gamepad_input_mapping(struct hid_device *hdev,
- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
int i;
- unsigned use;
- unsigned up = usage->hid & HID_USAGE_PAGE;
+ unsigned int use;
+ unsigned int up = usage->hid & HID_USAGE_PAGE;
if (!(up == HID_UP_BUTTON || up == HID_UP_CONSUMER))
return 0;
@@ -258,12 +268,14 @@ static int samsung_gamepad_input_mapping(struct hid_device *hdev,
}
static int samsung_actionmouse_input_mapping(struct hid_device *hdev,
- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
int i;
- unsigned use;
- unsigned up = usage->hid & HID_USAGE_PAGE;
+ unsigned int use;
+ unsigned int up = usage->hid & HID_USAGE_PAGE;
static const struct key_clear_map kcm[] = {
{ 0x301, 254 },
};
@@ -271,7 +283,8 @@ static int samsung_actionmouse_input_mapping(struct hid_device *hdev,
use = usage->hid & HID_USAGE;
dbg_hid("samsung wireless actionmouse input mapping event [0x%x], [0x%x], %ld, %ld, [0x%x]\n",
- use, usage->hid & HID_USAGE, hi->input->evbit[0], hi->input->absbit[0],
+ use, usage->hid & HID_USAGE,
+ hi->input->evbit[0], hi->input->absbit[0],
up);
if (!(up == HID_UP_CONSUMER || up == HID_UP_BUTTON))
@@ -288,12 +301,14 @@ static int samsung_actionmouse_input_mapping(struct hid_device *hdev,
}
static int samsung_universal_kbd_input_mapping(struct hid_device *hdev,
- struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
int i;
- unsigned use;
- unsigned up = usage->hid & HID_USAGE_PAGE;
+ unsigned int use;
+ unsigned int up = usage->hid & HID_USAGE_PAGE;
if (!(up == HID_UP_CONSUMER || up == HID_UP_KEYBOARD))
return 0;
@@ -362,43 +377,46 @@ static int samsung_universal_kbd_input_mapping(struct hid_device *hdev,
}
static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
- unsigned int *rsize)
+ unsigned int *rsize)
{
- if (hdev->product == USB_DEVICE_ID_SAMSUNG_IR_REMOTE && hid_is_usb(hdev))
+ if (hdev->product == USB_DEVICE_ID_SAMSUNG_IR_REMOTE &&
+ hid_is_usb(hdev))
rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize);
return rdesc;
}
-static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
- struct hid_field *field, struct hid_usage *usage,
- unsigned long **bit, int *max)
+static int samsung_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi,
+ struct hid_field *field,
+ struct hid_usage *usage,
+ unsigned long **bit, int *max)
{
- int ret = 0;
-
- if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE && hid_is_usb(hdev))
- ret = samsung_kbd_mouse_input_mapping(hdev,
- hi, field, usage, bit, max);
- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD)
- ret = samsung_kbd_input_mapping(hdev,
- hi, field, usage, bit, max);
- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD)
- ret = samsung_gamepad_input_mapping(hdev,
- hi, field, usage, bit, max);
- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE)
- ret = samsung_actionmouse_input_mapping(hdev,
- hi, field, usage, bit, max);
- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD)
- ret = samsung_universal_kbd_input_mapping(hdev,
- hi, field, usage, bit, max);
- else if (hdev->product == USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD)
- ret = samsung_universal_kbd_input_mapping(hdev,
- hi, field, usage, bit, max);
-
- return ret;
+ switch (hdev->product) {
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE:
+ if (hid_is_usb(hdev))
+ return samsung_kbd_mouse_input_mapping(hdev, hi, field,
+ usage, bit, max);
+ break;
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD:
+ return samsung_kbd_input_mapping(hdev, hi, field,
+ usage, bit, max);
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD:
+ return samsung_gamepad_input_mapping(hdev, hi, field,
+ usage, bit, max);
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE:
+ return samsung_actionmouse_input_mapping(hdev, hi, field,
+ usage, bit, max);
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD:
+ case USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD:
+ return samsung_universal_kbd_input_mapping(hdev, hi, field,
+ usage, bit, max);
+ }
+
+ return 0;
}
static int samsung_probe(struct hid_device *hdev,
- const struct hid_device_id *id)
+ const struct hid_device_id *id)
{
int ret;
unsigned int cmask = HID_CONNECT_DEFAULT;
@@ -406,14 +424,13 @@ static int samsung_probe(struct hid_device *hdev,
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "parse failed\n");
- goto err_free;
+ return ret;
}
if (hdev->product == USB_DEVICE_ID_SAMSUNG_IR_REMOTE) {
- if (!hid_is_usb(hdev)) {
- ret = -EINVAL;
- goto err_free;
- }
+ if (!hid_is_usb(hdev))
+ return -EINVAL;
+
if (hdev->rsize == 184) {
/* disable hidinput, force hiddev */
cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
@@ -424,22 +441,27 @@ static int samsung_probe(struct hid_device *hdev,
ret = hid_hw_start(hdev, cmask);
if (ret) {
hid_err(hdev, "hw start failed\n");
- goto err_free;
+ return ret;
}
return 0;
-err_free:
- return ret;
}
static const struct hid_device_id samsung_devices[] = {
- { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
- { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD) },
- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD) },
- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE) },
- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD) },
- { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS, USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG,
+ USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD) },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_GAMEPAD) },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_ACTIONMOUSE) },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_UNIVERSAL_KBD) },
+ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SAMSUNG_ELECTRONICS,
+ USB_DEVICE_ID_SAMSUNG_WIRELESS_MULTI_HOGP_KBD) },
{ }
};
MODULE_DEVICE_TABLE(hid, samsung_devices);
--
2.43.0