[PATCH 3/7] Input: logips2pp - clean up code
From: Dmitry Torokhov
Date: Fri Jan 19 2018 - 18:07:12 EST
- switch to using BIT() macros
- use u8 instead of unsigned char for byte data
- use input_set_capability() instead of manipulating capabilities bits
directly
- use sign_extend32() when extracting wheel data.
- do not abuse -1 as error code, propagate errors from various calls.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
drivers/input/mouse/logips2pp.c | 142 +++++++++++++++++++++++-----------------
1 file changed, 83 insertions(+), 59 deletions(-)
diff --git a/drivers/input/mouse/logips2pp.c b/drivers/input/mouse/logips2pp.c
index b7d17db632fc0..3c8d7051ef5e0 100644
--- a/drivers/input/mouse/logips2pp.c
+++ b/drivers/input/mouse/logips2pp.c
@@ -9,9 +9,11 @@
* the Free Software Foundation.
*/
+#include <linux/bitops.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
+#include <linux/types.h>
#include "psmouse.h"
#include "logips2pp.h"
@@ -22,12 +24,12 @@
#define PS2PP_KIND_TRACKMAN 4
/* Logitech mouse features */
-#define PS2PP_WHEEL 0x01
-#define PS2PP_HWHEEL 0x02
-#define PS2PP_SIDE_BTN 0x04
-#define PS2PP_EXTRA_BTN 0x08
-#define PS2PP_TASK_BTN 0x10
-#define PS2PP_NAV_BTN 0x20
+#define PS2PP_WHEEL BIT(0)
+#define PS2PP_HWHEEL BIT(1)
+#define PS2PP_SIDE_BTN BIT(2)
+#define PS2PP_EXTRA_BTN BIT(3)
+#define PS2PP_TASK_BTN BIT(4)
+#define PS2PP_NAV_BTN BIT(5)
struct ps2pp_info {
u8 model;
@@ -42,7 +44,7 @@ struct ps2pp_info {
static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
{
struct input_dev *dev = psmouse->dev;
- unsigned char *packet = psmouse->packet;
+ u8 *packet = psmouse->packet;
if (psmouse->pktcnt < 3)
return PSMOUSE_GOOD_DATA;
@@ -58,28 +60,30 @@ static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
case 0x0d: /* Mouse extra info */
- input_report_rel(dev, packet[2] & 0x80 ? REL_HWHEEL : REL_WHEEL,
- (int) (packet[2] & 8) - (int) (packet[2] & 7));
- input_report_key(dev, BTN_SIDE, (packet[2] >> 4) & 1);
- input_report_key(dev, BTN_EXTRA, (packet[2] >> 5) & 1);
+ input_report_rel(dev,
+ packet[2] & 0x80 ? REL_HWHEEL : REL_WHEEL,
+ -sign_extend32(packet[2], 3));
+ input_report_key(dev, BTN_SIDE, packet[2] & BIT(4));
+ input_report_key(dev, BTN_EXTRA, packet[2] & BIT(5));
break;
case 0x0e: /* buttons 4, 5, 6, 7, 8, 9, 10 info */
- input_report_key(dev, BTN_SIDE, (packet[2]) & 1);
- input_report_key(dev, BTN_EXTRA, (packet[2] >> 1) & 1);
- input_report_key(dev, BTN_BACK, (packet[2] >> 3) & 1);
- input_report_key(dev, BTN_FORWARD, (packet[2] >> 4) & 1);
- input_report_key(dev, BTN_TASK, (packet[2] >> 2) & 1);
+ input_report_key(dev, BTN_SIDE, packet[2] & BIT(0));
+ input_report_key(dev, BTN_EXTRA, packet[2] & BIT(1));
+ input_report_key(dev, BTN_TASK, packet[2] & BIT(2));
+ input_report_key(dev, BTN_BACK, packet[2] & BIT(3));
+ input_report_key(dev, BTN_FORWARD, packet[2] & BIT(4));
break;
case 0x0f: /* TouchPad extra info */
- input_report_rel(dev, packet[2] & 0x08 ? REL_HWHEEL : REL_WHEEL,
- (int) ((packet[2] >> 4) & 8) - (int) ((packet[2] >> 4) & 7));
- packet[0] = packet[2] | 0x08;
+ input_report_rel(dev,
+ packet[2] & 0x08 ? REL_HWHEEL : REL_WHEEL,
+ -sign_extend32(packet[2] >> 4, 3));
+ packet[0] = packet[2] | BIT(3);
break;
default:
@@ -109,13 +113,17 @@ static psmouse_ret_t ps2pp_process_byte(struct psmouse *psmouse)
* Ugly.
*/
-static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned char command)
+static int ps2pp_cmd(struct psmouse *psmouse, u8 *param, u8 command)
{
- if (psmouse_sliced_command(psmouse, command))
- return -1;
+ int error;
+
+ error = psmouse_sliced_command(psmouse, command);
+ if (error)
+ return error;
- if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300))
- return -1;
+ error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_POLL | 0x0300);
+ if (error)
+ return error;
return 0;
}
@@ -131,7 +139,7 @@ static int ps2pp_cmd(struct psmouse *psmouse, unsigned char *param, unsigned cha
static void ps2pp_set_smartscroll(struct psmouse *psmouse, bool smartscroll)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
- unsigned char param[4];
+ u8 param[4];
ps2pp_cmd(psmouse, param, 0x32);
@@ -169,7 +177,7 @@ static ssize_t ps2pp_attr_set_smartscroll(struct psmouse *psmouse, void *data,
}
PSMOUSE_DEFINE_ATTR(smartscroll, S_IWUSR | S_IRUGO, NULL,
- ps2pp_attr_show_smartscroll, ps2pp_attr_set_smartscroll);
+ ps2pp_attr_show_smartscroll, ps2pp_attr_set_smartscroll);
/*
* Support 800 dpi resolution _only_ if the user wants it (there are good
@@ -177,11 +185,12 @@ PSMOUSE_DEFINE_ATTR(smartscroll, S_IWUSR | S_IRUGO, NULL,
* also good reasons to use it, let the user decide).
*/
-static void ps2pp_set_resolution(struct psmouse *psmouse, unsigned int resolution)
+static void ps2pp_set_resolution(struct psmouse *psmouse,
+ unsigned int resolution)
{
if (resolution > 400) {
struct ps2dev *ps2dev = &psmouse->ps2dev;
- unsigned char param = 3;
+ u8 param = 3;
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
@@ -194,7 +203,8 @@ static void ps2pp_set_resolution(struct psmouse *psmouse, unsigned int resolutio
static void ps2pp_disconnect(struct psmouse *psmouse)
{
- device_remove_file(&psmouse->ps2dev.serio->dev, &psmouse_attr_smartscroll.dattr);
+ device_remove_file(&psmouse->ps2dev.serio->dev,
+ &psmouse_attr_smartscroll.dattr);
}
static const struct ps2pp_info *get_model_info(unsigned char model)
@@ -267,24 +277,24 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse,
struct input_dev *input_dev = psmouse->dev;
if (model_info->features & PS2PP_SIDE_BTN)
- __set_bit(BTN_SIDE, input_dev->keybit);
+ input_set_capability(input_dev, EV_KEY, BTN_SIDE);
if (model_info->features & PS2PP_EXTRA_BTN)
- __set_bit(BTN_EXTRA, input_dev->keybit);
+ input_set_capability(input_dev, EV_KEY, BTN_EXTRA);
if (model_info->features & PS2PP_TASK_BTN)
- __set_bit(BTN_TASK, input_dev->keybit);
+ input_set_capability(input_dev, EV_KEY, BTN_TASK);
if (model_info->features & PS2PP_NAV_BTN) {
- __set_bit(BTN_FORWARD, input_dev->keybit);
- __set_bit(BTN_BACK, input_dev->keybit);
+ input_set_capability(input_dev, EV_KEY, BTN_FORWARD);
+ input_set_capability(input_dev, EV_KEY, BTN_BACK);
}
if (model_info->features & PS2PP_WHEEL)
- __set_bit(REL_WHEEL, input_dev->relbit);
+ input_set_capability(input_dev, EV_REL, REL_WHEEL);
if (model_info->features & PS2PP_HWHEEL)
- __set_bit(REL_HWHEEL, input_dev->relbit);
+ input_set_capability(input_dev, EV_REL, REL_HWHEEL);
switch (model_info->kind) {
@@ -316,6 +326,30 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse,
}
}
+static int ps2pp_setup_protocol(struct psmouse *psmouse,
+ const struct ps2pp_info *model_info)
+{
+ int error;
+
+ psmouse->protocol_handler = ps2pp_process_byte;
+ psmouse->pktsize = 3;
+
+ if (model_info->kind != PS2PP_KIND_TP3) {
+ psmouse->set_resolution = ps2pp_set_resolution;
+ psmouse->disconnect = ps2pp_disconnect;
+
+ error = device_create_file(&psmouse->ps2dev.serio->dev,
+ &psmouse_attr_smartscroll.dattr);
+ if (error) {
+ psmouse_err(psmouse,
+ "failed to create smartscroll sysfs attribute, error: %d\n",
+ error);
+ return error;
+ }
+ }
+
+ return 0;
+}
/*
* Logitech magic init. Detect whether the mouse is a Logitech one
@@ -326,9 +360,9 @@ static void ps2pp_set_model_properties(struct psmouse *psmouse,
int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
- unsigned char param[4];
- unsigned char model, buttons;
const struct ps2pp_info *model_info;
+ u8 param[4];
+ u8 model, buttons;
bool use_ps2pp = false;
int error;
@@ -344,7 +378,7 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
buttons = param[1];
if (!model || !buttons)
- return -1;
+ return -ENXIO;
model_info = get_model_info(model);
if (model_info) {
@@ -366,7 +400,8 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
param[0] = 0;
if (!ps2_command(ps2dev, param, 0x13d1) &&
- param[0] == 0x06 && param[1] == 0x00 && param[2] == 0x14) {
+ param[0] == 0x06 && param[1] == 0x00 &&
+ param[2] == 0x14) {
use_ps2pp = true;
}
@@ -385,7 +420,9 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
}
} else {
- psmouse_warn(psmouse, "Detected unknown Logitech mouse model %d\n", model);
+ psmouse_warn(psmouse,
+ "Detected unknown Logitech mouse model %d\n",
+ model);
}
if (set_properties) {
@@ -393,31 +430,18 @@ int ps2pp_detect(struct psmouse *psmouse, bool set_properties)
psmouse->model = model;
if (use_ps2pp) {
- psmouse->protocol_handler = ps2pp_process_byte;
- psmouse->pktsize = 3;
-
- if (model_info->kind != PS2PP_KIND_TP3) {
- psmouse->set_resolution = ps2pp_set_resolution;
- psmouse->disconnect = ps2pp_disconnect;
-
- error = device_create_file(&ps2dev->serio->dev,
- &psmouse_attr_smartscroll.dattr);
- if (error) {
- psmouse_err(psmouse,
- "failed to create smartscroll sysfs attribute, error: %d\n",
- error);
- return -1;
- }
- }
+ error = ps2pp_setup_protocol(psmouse, model_info);
+ if (error)
+ return error;
}
if (buttons >= 3)
- __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
+ input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
if (model_info)
ps2pp_set_model_properties(psmouse, model_info, use_ps2pp);
}
- return use_ps2pp ? 0 : -1;
+ return use_ps2pp ? 0 : -ENXIO;
}
--
2.16.0.rc1.238.g530d649a79-goog