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https://github.com/torvalds/linux.git
synced 2024-11-25 21:51:40 +00:00
Input: psmouse - clean up code
- 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@gmail.com>
This commit is contained in:
Dmitry Torokhov
parent
1ef8580539
commit
ba667650c5
@ -14,6 +14,7 @@
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define psmouse_fmt(fmt) fmt
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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@ -23,6 +24,7 @@
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#include <linux/init.h>
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#include <linux/libps2.h>
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include "psmouse.h"
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#include "synaptics.h"
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@ -147,7 +149,7 @@ void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
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psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
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{
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struct input_dev *dev = psmouse->dev;
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unsigned char *packet = psmouse->packet;
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u8 *packet = psmouse->packet;
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if (psmouse->pktcnt < psmouse->pktsize)
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return PSMOUSE_GOOD_DATA;
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@ -157,39 +159,42 @@ psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
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switch (psmouse->protocol->type) {
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case PSMOUSE_IMPS:
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/* IntelliMouse has scroll wheel */
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input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
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input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
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break;
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case PSMOUSE_IMEX:
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/* Scroll wheel and buttons on IntelliMouse Explorer */
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switch (packet[3] & 0xC0) {
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case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
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input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
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input_report_rel(dev, REL_WHEEL,
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-sign_extend32(packet[3], 5));
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break;
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case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
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input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
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input_report_rel(dev, REL_HWHEEL,
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-sign_extend32(packet[3], 5));
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break;
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case 0x00:
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case 0xC0:
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input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
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input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
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input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
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input_report_rel(dev, REL_WHEEL,
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-sign_extend32(packet[3], 3));
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input_report_key(dev, BTN_SIDE, BIT(4));
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input_report_key(dev, BTN_EXTRA, BIT(5));
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break;
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}
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break;
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case PSMOUSE_GENPS:
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/* Report scroll buttons on NetMice */
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input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
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input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
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/* Extra buttons on Genius NewNet 3D */
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input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
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input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
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input_report_key(dev, BTN_SIDE, BIT(6));
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input_report_key(dev, BTN_EXTRA, BIT(7));
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break;
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case PSMOUSE_THINKPS:
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/* Extra button on ThinkingMouse */
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input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
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input_report_key(dev, BTN_EXTRA, BIT(3));
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/*
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* Without this bit of weirdness moving up gives wildly
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@ -203,8 +208,8 @@ psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
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* Cortron PS2 Trackball reports SIDE button in the
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* 4th bit of the first byte.
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*/
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input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
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packet[0] |= 0x08;
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input_report_key(dev, BTN_SIDE, BIT(3));
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packet[0] |= BIT(3);
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break;
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default:
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@ -269,7 +274,7 @@ static int psmouse_handle_byte(struct psmouse *psmouse)
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psmouse_notice(psmouse,
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"issuing reconnect request\n");
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serio_reconnect(psmouse->ps2dev.serio);
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return -1;
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return -EIO;
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}
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}
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psmouse->pktcnt = 0;
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@ -320,7 +325,7 @@ static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
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* for normal processing or gathering them as command response.
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*/
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static irqreturn_t psmouse_interrupt(struct serio *serio,
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unsigned char data, unsigned int flags)
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u8 data, unsigned int flags)
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{
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struct psmouse *psmouse = serio_get_drvdata(serio);
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@ -418,17 +423,20 @@ static irqreturn_t psmouse_interrupt(struct serio *serio,
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* 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
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* is the command.
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*/
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int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
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int psmouse_sliced_command(struct psmouse *psmouse, u8 command)
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{
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int i;
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int error;
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if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
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return -1;
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error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
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if (error)
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return error;
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for (i = 6; i >= 0; i -= 2) {
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unsigned char d = (command >> i) & 3;
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if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
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return -1;
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u8 d = (command >> i) & 3;
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error = ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES);
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if (error)
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return error;
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}
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return 0;
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@ -439,13 +447,15 @@ int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
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*/
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int psmouse_reset(struct psmouse *psmouse)
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{
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unsigned char param[2];
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u8 param[2];
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int error;
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if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
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return -1;
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error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
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if (error)
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return error;
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if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
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return -1;
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return -EIO;
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return 0;
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}
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@ -455,8 +465,8 @@ int psmouse_reset(struct psmouse *psmouse)
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*/
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void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
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{
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static const unsigned char params[] = { 0, 1, 2, 2, 3 };
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unsigned char p;
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static const u8 params[] = { 0, 1, 2, 2, 3 };
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u8 p;
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if (resolution == 0 || resolution > 200)
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resolution = 200;
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@ -471,11 +481,12 @@ void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
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*/
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static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
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{
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static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
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unsigned char r;
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static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
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u8 r;
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int i = 0;
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while (rates[i] > rate) i++;
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while (rates[i] > rate)
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i++;
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r = rates[i];
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ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
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psmouse->rate = r;
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@ -547,7 +558,7 @@ bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
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static int genius_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[4];
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u8 param[4];
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param[0] = 3;
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ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
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@ -557,7 +568,7 @@ static int genius_detect(struct psmouse *psmouse, bool set_properties)
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ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
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if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
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return -1;
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return -ENODEV;
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if (set_properties) {
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__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
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@ -579,7 +590,7 @@ static int genius_detect(struct psmouse *psmouse, bool set_properties)
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static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[2];
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u8 param[2];
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param[0] = 200;
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ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
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@ -590,7 +601,7 @@ static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
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ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
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if (param[0] != 3)
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return -1;
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return -ENODEV;
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if (set_properties) {
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__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
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@ -612,7 +623,7 @@ static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
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static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[2];
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u8 param[2];
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intellimouse_detect(psmouse, 0);
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@ -625,7 +636,7 @@ static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
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ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
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if (param[0] != 4)
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return -1;
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return -ENODEV;
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/* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
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param[0] = 200;
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@ -658,8 +669,8 @@ static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
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static int thinking_detect(struct psmouse *psmouse, bool set_properties)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[2];
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static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
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u8 param[2];
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static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
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int i;
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param[0] = 10;
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@ -673,7 +684,7 @@ static int thinking_detect(struct psmouse *psmouse, bool set_properties)
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ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
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if (param[0] != 2)
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return -1;
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return -ENODEV;
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if (set_properties) {
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__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
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@ -701,7 +712,7 @@ static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
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* We have no way of figuring true number of buttons so let's
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* assume that the device has 3.
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*/
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__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
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input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
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}
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return 0;
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@ -956,20 +967,17 @@ static void psmouse_apply_defaults(struct psmouse *psmouse)
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{
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struct input_dev *input_dev = psmouse->dev;
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memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
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memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
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memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
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memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
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memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
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bitmap_zero(input_dev->evbit, EV_CNT);
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bitmap_zero(input_dev->keybit, KEY_CNT);
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bitmap_zero(input_dev->relbit, REL_CNT);
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bitmap_zero(input_dev->absbit, ABS_CNT);
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bitmap_zero(input_dev->mscbit, MSC_CNT);
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__set_bit(EV_KEY, input_dev->evbit);
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__set_bit(EV_REL, input_dev->evbit);
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input_set_capability(input_dev, EV_KEY, BTN_LEFT);
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input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
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__set_bit(BTN_LEFT, input_dev->keybit);
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__set_bit(BTN_RIGHT, input_dev->keybit);
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__set_bit(REL_X, input_dev->relbit);
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__set_bit(REL_Y, input_dev->relbit);
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input_set_capability(input_dev, EV_REL, REL_X);
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input_set_capability(input_dev, EV_REL, REL_Y);
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__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
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@ -1231,7 +1239,8 @@ static int psmouse_extensions(struct psmouse *psmouse,
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static int psmouse_probe(struct psmouse *psmouse)
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{
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char param[2];
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u8 param[2];
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int error;
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/*
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* First, we check if it's a mouse. It should send 0x00 or 0x03 in
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@ -1240,20 +1249,22 @@ static int psmouse_probe(struct psmouse *psmouse)
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* subsequent ID queries, probably due to a firmware bug.
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*/
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param[0] = 0xa5;
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if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
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return -1;
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error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
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if (error)
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return error;
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if (param[0] != 0x00 && param[0] != 0x03 &&
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param[0] != 0x04 && param[0] != 0xff)
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return -1;
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return -ENODEV;
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/*
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* Then we reset and disable the mouse so that it doesn't generate
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* events.
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*/
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if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
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psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
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ps2dev->serio->phys);
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error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
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if (error)
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psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
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ps2dev->serio->phys, error);
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return 0;
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}
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@ -1294,10 +1305,13 @@ int psmouse_activate(struct psmouse *psmouse)
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*/
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int psmouse_deactivate(struct psmouse *psmouse)
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{
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if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
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psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
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psmouse->ps2dev.serio->phys);
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return -1;
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int error;
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error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
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if (error) {
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psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
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psmouse->ps2dev.serio->phys, error);
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return error;
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}
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psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
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