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Message-ID: <56556F39.7060406@redhat.com>
Date: Wed, 25 Nov 2015 09:20:09 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org
Cc: Mathias Gottschlag <mgottschlag@...il.com>,
Benjamin Tissoires <benjamin.tissoires@...hat.com>,
Thomas Hellstrom <thellstrom@...are.com>, pali.rohar@...il.com,
jckeerthan@...il.com, till2.schaefer@...-dortmund.de,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: psmouse - limit protocols that we try on
passthrough ports
Hi Dmitry,
On 25-11-15 03:16, Dmitry Torokhov wrote:
> PS/2 protocol is slow, and using it with pass-through port (where we
> encapsulate PS/2 into PS/2) is slower yet so it takes quite a bit of time
> to do full protocol discovery for device attached to a pass-through port.
> However, so far we have not see anything but tackpoint or basic PS/2 device
s/tackpoint/trackpoint/
> on pass-through ports, so let's limit protocols that we probe there to
> Trackpoint, IntelliMouse Explorer, IntelliMouse, and bare PS/2 protocol,
> and avoid other extended protocols, such as Synaptics, ALPS, etc.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
> drivers/input/mouse/focaltech.c | 4 +-
> drivers/input/mouse/psmouse-base.c | 575 +++++++++++++++++++------------------
> 2 files changed, 297 insertions(+), 282 deletions(-)
>
> diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c
> index 4d5576d..d03f916 100644
> --- a/drivers/input/mouse/focaltech.c
> +++ b/drivers/input/mouse/focaltech.c
> @@ -461,9 +461,7 @@ fail:
>
> int focaltech_init(struct psmouse *psmouse)
> {
> - focaltech_reset(psmouse);
> -
> - return 0;
> + return -ENOSYS;
> }
>
> #endif /* CONFIG_MOUSE_PS2_FOCALTECH */
This seems like an unrelated change, and it seem wrong to me.
> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
> index ad18dab..9610017 100644
> --- a/drivers/input/mouse/psmouse-base.c
> +++ b/drivers/input/mouse/psmouse-base.c
> @@ -119,6 +119,7 @@ struct psmouse_protocol {
> enum psmouse_type type;
> bool maxproto;
> bool ignore_parity; /* Protocol should ignore parity errors from KBC */
> + bool try_passthru; /* Try protocol also on passthrough ports */
> const char *name;
> const char *alias;
> int (*detect)(struct psmouse *, bool);
> @@ -699,284 +700,6 @@ static int cortron_detect(struct psmouse *psmouse, bool set_properties)
> return 0;
> }
>
> -/*
> - * Apply default settings to the psmouse structure. Most of them will
> - * be overridden by individual protocol initialization routines.
> - */
> -
> -static void psmouse_apply_defaults(struct psmouse *psmouse)
> -{
> - struct input_dev *input_dev = psmouse->dev;
> -
> - memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
> - memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
> - memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
> - memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
> - memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
> -
> - __set_bit(EV_KEY, input_dev->evbit);
> - __set_bit(EV_REL, input_dev->evbit);
> -
> - __set_bit(BTN_LEFT, input_dev->keybit);
> - __set_bit(BTN_RIGHT, input_dev->keybit);
> -
> - __set_bit(REL_X, input_dev->relbit);
> - __set_bit(REL_Y, input_dev->relbit);
> -
> - __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
> -
> - psmouse->set_rate = psmouse_set_rate;
> - psmouse->set_resolution = psmouse_set_resolution;
> - psmouse->set_scale = psmouse_set_scale;
> - psmouse->poll = psmouse_poll;
> - psmouse->protocol_handler = psmouse_process_byte;
> - psmouse->pktsize = 3;
> - psmouse->reconnect = NULL;
> - psmouse->disconnect = NULL;
> - psmouse->cleanup = NULL;
> - psmouse->pt_activate = NULL;
> - psmouse->pt_deactivate = NULL;
> -}
> -
> -/*
> - * Apply default settings to the psmouse structure and call specified
> - * protocol detection or initialization routine.
> - */
> -static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
> - bool set_properties),
> - struct psmouse *psmouse, bool set_properties)
> -{
> - if (set_properties)
> - psmouse_apply_defaults(psmouse);
> -
> - return detect(psmouse, set_properties);
> -}
> -
> -/*
> - * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
> - * the mouse may have.
> - */
> -
> -static int psmouse_extensions(struct psmouse *psmouse,
> - unsigned int max_proto, bool set_properties)
> -{
> - bool synaptics_hardware = false;
> -
> -/* Always check for focaltech, this is safe as it uses pnp-id matching */
> - if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) {
> - if (max_proto > PSMOUSE_IMEX) {
> - if (!set_properties || focaltech_init(psmouse) == 0) {
> - if (IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH))
> - return PSMOUSE_FOCALTECH;
> - /*
> - * Note that we need to also restrict
> - * psmouse_max_proto so that psmouse_initialize()
> - * does not try to reset rate and resolution,
> - * because even that upsets the device.
> - */
> - psmouse_max_proto = PSMOUSE_PS2;
> - return PSMOUSE_PS2;
> - }
> - }
> - }
> -
> -/*
> - * We always check for lifebook because it does not disturb mouse
> - * (it only checks DMI information).
> - */
> - if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
> - if (max_proto > PSMOUSE_IMEX) {
> - if (!set_properties || lifebook_init(psmouse) == 0)
> - return PSMOUSE_LIFEBOOK;
> - }
> - }
> -
> - if (psmouse_do_detect(vmmouse_detect, psmouse, set_properties) == 0) {
> - if (max_proto > PSMOUSE_IMEX) {
> - if (!set_properties || vmmouse_init(psmouse) == 0)
> - return PSMOUSE_VMMOUSE;
> - }
> - }
> -
> -/*
> - * Try Kensington ThinkingMouse (we try first, because synaptics probe
> - * upsets the thinkingmouse).
> - */
> -
> - if (max_proto > PSMOUSE_IMEX &&
> - psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
> - return PSMOUSE_THINKPS;
> - }
> -
> -/*
> - * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
> - * support is disabled in config - we need to know if it is synaptics so we
> - * can reset it properly after probing for intellimouse.
> - */
> - if (max_proto > PSMOUSE_PS2 &&
> - psmouse_do_detect(synaptics_detect, psmouse, set_properties) == 0) {
> - synaptics_hardware = true;
> -
> - if (max_proto > PSMOUSE_IMEX) {
> -/*
> - * Try activating protocol, but check if support is enabled first, since
> - * we try detecting Synaptics even when protocol is disabled.
> - */
> - if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
> - (!set_properties || synaptics_init(psmouse) == 0)) {
> - return PSMOUSE_SYNAPTICS;
> - }
> -
> -/*
> - * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
> - * Unfortunately Logitech/Genius probes confuse some firmware versions so
> - * we'll have to skip them.
> - */
> - max_proto = PSMOUSE_IMEX;
> - }
> -/*
> - * Make sure that touchpad is in relative mode, gestures (taps) are enabled
> - */
> - synaptics_reset(psmouse);
> - }
> -
> -/*
> - * Try Cypress Trackpad.
> - * Must try it before Finger Sensing Pad because Finger Sensing Pad probe
> - * upsets some modules of Cypress Trackpads.
> - */
> - if (max_proto > PSMOUSE_IMEX &&
> - cypress_detect(psmouse, set_properties) == 0) {
> - if (IS_ENABLED(CONFIG_MOUSE_PS2_CYPRESS)) {
> - if (cypress_init(psmouse) == 0)
> - return PSMOUSE_CYPRESS;
> -
> - /*
> - * Finger Sensing Pad probe upsets some modules of
> - * Cypress Trackpad, must avoid Finger Sensing Pad
> - * probe if Cypress Trackpad device detected.
> - */
> - return PSMOUSE_PS2;
> - }
> -
> - max_proto = PSMOUSE_IMEX;
> - }
> -
> -/*
> - * Try ALPS TouchPad
> - */
> - if (max_proto > PSMOUSE_IMEX) {
> - ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
> - if (psmouse_do_detect(alps_detect,
> - psmouse, set_properties) == 0) {
> - if (!set_properties || alps_init(psmouse) == 0)
> - return PSMOUSE_ALPS;
> -/*
> - * Init failed, try basic relative protocols
> - */
> - max_proto = PSMOUSE_IMEX;
> - }
> - }
> -
> -/*
> - * Try OLPC HGPK touchpad.
> - */
> - if (max_proto > PSMOUSE_IMEX &&
> - psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
> - if (!set_properties || hgpk_init(psmouse) == 0)
> - return PSMOUSE_HGPK;
> -/*
> - * Init failed, try basic relative protocols
> - */
> - max_proto = PSMOUSE_IMEX;
> - }
> -
> -/*
> - * Try Elantech touchpad.
> - */
> - if (max_proto > PSMOUSE_IMEX &&
> - psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
> - if (!set_properties || elantech_init(psmouse) == 0)
> - return PSMOUSE_ELANTECH;
> -/*
> - * Init failed, try basic relative protocols
> - */
> - max_proto = PSMOUSE_IMEX;
> - }
> -
> - if (max_proto > PSMOUSE_IMEX) {
> - if (psmouse_do_detect(genius_detect,
> - psmouse, set_properties) == 0)
> - return PSMOUSE_GENPS;
> -
> - if (psmouse_do_detect(ps2pp_init,
> - psmouse, set_properties) == 0)
> - return PSMOUSE_PS2PP;
> -
> - if (psmouse_do_detect(trackpoint_detect,
> - psmouse, set_properties) == 0)
> - return PSMOUSE_TRACKPOINT;
> -
> - if (psmouse_do_detect(touchkit_ps2_detect,
> - psmouse, set_properties) == 0)
> - return PSMOUSE_TOUCHKIT_PS2;
> - }
> -
> -/*
> - * Try Finger Sensing Pad. We do it here because its probe upsets
> - * Trackpoint devices (causing TP_READ_ID command to time out).
> - */
> - if (max_proto > PSMOUSE_IMEX) {
> - if (psmouse_do_detect(fsp_detect,
> - psmouse, set_properties) == 0) {
> - if (!set_properties || fsp_init(psmouse) == 0)
> - return PSMOUSE_FSP;
> -/*
> - * Init failed, try basic relative protocols
> - */
> - max_proto = PSMOUSE_IMEX;
> - }
> - }
> -
> -/*
> - * Reset to defaults in case the device got confused by extended
> - * protocol probes. Note that we follow up with full reset because
> - * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
> - */
> - ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
> - psmouse_reset(psmouse);
> -
> - if (max_proto >= PSMOUSE_IMEX &&
> - psmouse_do_detect(im_explorer_detect,
> - psmouse, set_properties) == 0) {
> - return PSMOUSE_IMEX;
> - }
> -
> - if (max_proto >= PSMOUSE_IMPS &&
> - psmouse_do_detect(intellimouse_detect,
> - psmouse, set_properties) == 0) {
> - return PSMOUSE_IMPS;
> - }
> -
> -/*
> - * Okay, all failed, we have a standard mouse here. The number of the buttons
> - * is still a question, though. We assume 3.
> - */
> - psmouse_do_detect(ps2bare_detect, psmouse, set_properties);
> -
> - if (synaptics_hardware) {
> -/*
> - * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
> - * We need to reset the touchpad because if there is a track point on the
> - * pass through port it could get disabled while probing for protocol
> - * extensions.
> - */
> - psmouse_reset(psmouse);
> - }
> -
> - return PSMOUSE_PS2;
> -}
> -
> static const struct psmouse_protocol psmouse_protocols[] = {
> {
> .type = PSMOUSE_PS2,
> @@ -985,6 +708,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .maxproto = true,
> .ignore_parity = true,
> .detect = ps2bare_detect,
> + .try_passthru = true,
> },
> #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
> {
> @@ -1022,6 +746,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .maxproto = true,
> .ignore_parity = true,
> .detect = intellimouse_detect,
> + .try_passthru = true,
> },
> {
> .type = PSMOUSE_IMEX,
> @@ -1030,6 +755,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .maxproto = true,
> .ignore_parity = true,
> .detect = im_explorer_detect,
> + .try_passthru = true,
> },
> #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
> {
> @@ -1061,6 +787,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .type = PSMOUSE_LIFEBOOK,
> .name = "LBPS/2",
> .alias = "lifebook",
> + .detect = lifebook_detect,
> .init = lifebook_init,
> },
> #endif
> @@ -1070,6 +797,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .name = "TPPS/2",
> .alias = "trackpoint",
> .detect = trackpoint_detect,
> + .try_passthru = true,
> },
> #endif
> #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
> @@ -1138,7 +866,7 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> },
> };
>
> -static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
> +static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
> {
> int i;
>
> @@ -1146,6 +874,17 @@ static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type
> if (psmouse_protocols[i].type == type)
> return &psmouse_protocols[i];
>
> + return NULL;
> +}
> +
> +static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
> +{
> + const struct psmouse_protocol *proto;
> +
> + proto = __psmouse_protocol_by_type(type);
> + if (proto)
> + return proto;
> +
> WARN_ON(1);
> return &psmouse_protocols[0];
> }
> @@ -1166,6 +905,284 @@ static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name,
> return NULL;
> }
>
> +/*
> + * Apply default settings to the psmouse structure. Most of them will
> + * be overridden by individual protocol initialization routines.
> + */
> +
> +static void psmouse_apply_defaults(struct psmouse *psmouse)
> +{
> + struct input_dev *input_dev = psmouse->dev;
> +
> + memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
> + memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
> + memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
> + memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
> + memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
> +
> + __set_bit(EV_KEY, input_dev->evbit);
> + __set_bit(EV_REL, input_dev->evbit);
> +
> + __set_bit(BTN_LEFT, input_dev->keybit);
> + __set_bit(BTN_RIGHT, input_dev->keybit);
> +
> + __set_bit(REL_X, input_dev->relbit);
> + __set_bit(REL_Y, input_dev->relbit);
> +
> + __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
> +
> + psmouse->set_rate = psmouse_set_rate;
> + psmouse->set_resolution = psmouse_set_resolution;
> + psmouse->set_scale = psmouse_set_scale;
> + psmouse->poll = psmouse_poll;
> + psmouse->protocol_handler = psmouse_process_byte;
> + psmouse->pktsize = 3;
> + psmouse->reconnect = NULL;
> + psmouse->disconnect = NULL;
> + psmouse->cleanup = NULL;
> + psmouse->pt_activate = NULL;
> + psmouse->pt_deactivate = NULL;
> +}
> +
> +static bool psmouse_try_protocol(struct psmouse *psmouse,
> + enum psmouse_type type,
> + unsigned int *max_proto,
> + bool set_properties, bool do_init)
> +{
> + const struct psmouse_protocol *proto;
> +
> + proto = __psmouse_protocol_by_type(type);
> + if (!proto)
> + return false;
> +
> + if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
> + !proto->try_passthru) {
> + return false;
> + }
> +
> + if (set_properties)
> + psmouse_apply_defaults(psmouse);
> +
> + if (proto->detect(psmouse, set_properties) != 0)
> + return false;
> +
> + if (set_properties && do_init && proto->init) {
> + if (proto->init(psmouse) != 0) {
> + /*
> + * We detected device, but init failed. Adjust
> + * max_proto so we only try standard protocols.
> + */
> + if (*max_proto > PSMOUSE_IMEX)
> + *max_proto = PSMOUSE_IMEX;
> +
> + return false;
> + }
> + }
> +
> + return true;
> +}
> +
> +/*
> + * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
> + * the mouse may have.
> + */
> +
> +static int psmouse_extensions(struct psmouse *psmouse,
> + unsigned int max_proto, bool set_properties)
> +{
> + bool synaptics_hardware = false;
> +
> + /*
> + * Always check for focaltech, this is safe as it uses pnp-id
> + * matching
> + */
> + if (psmouse_try_protocol(psmouse, PSMOUSE_FOCALTECH,
> + &max_proto, set_properties, false)) {
> + if (max_proto > PSMOUSE_IMEX) {
> + if (IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
> + (!set_properties || focaltech_init(psmouse) == 0)) {
> + return PSMOUSE_FOCALTECH;
> + }
> + }
> +
> + /*
> + * Restrict psmouse_max_proto so that psmouse_initialize()
> + * does not try to reset rate and resolution, because even
> + * that upsets the device.
> + * This also causes us to basically fall through to basic
> + * protocol detection, where we fully reset the mouse,
> + * and set it up as bare PS/2 protocol device.
> + */
> + psmouse_max_proto = PSMOUSE_PS2;
> + }
> +
> + /*
> + * We always check for lifebook because it does not disturb mouse
> + * (it only checks DMI information).
> + */
> + if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
> + set_properties, max_proto > PSMOUSE_IMEX))
> + return PSMOUSE_LIFEBOOK;
> +
> + if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
> + set_properties, max_proto > PSMOUSE_IMEX))
> + return PSMOUSE_VMMOUSE;
> +
> + /*
> + * Try Kensington ThinkingMouse (we try first, because Synaptics
> + * probe upsets the thinkingmouse).
> + */
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
> + set_properties, true)) {
> + return PSMOUSE_THINKPS;
> + }
> +
> + /*
> + * Try Synaptics TouchPad. Note that probing is done even if
> + * Synaptics protocol support is disabled in config - we need to
> + * know if it is Synaptics so we can reset it properly after
> + * probing for IntelliMouse.
> + */
> + if (max_proto > PSMOUSE_PS2 &&
> + psmouse_try_protocol(psmouse, PSMOUSE_SYNAPTICS, &max_proto,
> + set_properties, false)) {
> + synaptics_hardware = true;
> +
> + if (max_proto > PSMOUSE_IMEX) {
> + /*
> + * Try activating protocol, but check if support is
> + * enabled first, since we try detecting Synaptics
> + * even when protocol is disabled.
> + */
> + if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
> + (!set_properties || synaptics_init(psmouse) == 0)) {
> + return PSMOUSE_SYNAPTICS;
> + }
> +
> + /*
> + * Some Synaptics touchpads can emulate extended
> + * protocols (like IMPS/2). Unfortunately
> + * Logitech/Genius probes confuse some firmware
> + * versions so we'll have to skip them.
> + */
> + max_proto = PSMOUSE_IMEX;
> + }
> +
> + /*
> + * Make sure that touchpad is in relative mode, gestures
> + * (taps) are enabled.
> + */
> + synaptics_reset(psmouse);
> + }
> +
> + /*
> + * Try Cypress Trackpad. Must try it before Finger Sensing Pad
> + * because Finger Sensing Pad probe upsets some modules of Cypress
> + * Trackpads.
> + */
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
> + set_properties, true)) {
> + return PSMOUSE_CYPRESS;
> + }
> +
> + /*
> + * Try ALPS TouchPad
> + */
> + if (max_proto > PSMOUSE_IMEX) {
> + ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
> + if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
> + &max_proto, set_properties, true))
> + return PSMOUSE_ALPS;
> + }
> +
> + /*
> + * Try OLPC HGPK touchpad.
> + */
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
> + set_properties, true)) {
> + return PSMOUSE_HGPK;
> + }
> +
> + /*
> + * Try Elantech touchpad.
> + */
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
> + &max_proto, set_properties, true)) {
> + return PSMOUSE_ELANTECH;
> + }
> +
> + if (max_proto > PSMOUSE_IMEX) {
> + if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
> + &max_proto, set_properties, true))
> + return PSMOUSE_GENPS;
> +
> + if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
> + &max_proto, set_properties, true))
> + return PSMOUSE_PS2PP;
> +
> + if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
> + &max_proto, set_properties, true))
> + return PSMOUSE_TRACKPOINT;
> +
> + if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
> + &max_proto, set_properties, true))
> + return PSMOUSE_TOUCHKIT_PS2;
> + }
> +
> + /*
> + * Try Finger Sensing Pad. We do it here because its probe upsets
> + * Trackpoint devices (causing TP_READ_ID command to time out).
> + */
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_FSP,
> + &max_proto, set_properties, true)) {
> + return PSMOUSE_FSP;
> + }
> +
> + /*
> + * Reset to defaults in case the device got confused by extended
> + * protocol probes. Note that we follow up with full reset because
> + * some mice put themselves to sleep when they see
> + * PSMOUSE_RESET_DIS.
> + */
> + ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
> + psmouse_reset(psmouse);
> +
> + if (max_proto >= PSMOUSE_IMEX &&
> + psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
> + &max_proto, set_properties, true)) {
> + return PSMOUSE_IMEX;
> + }
> +
> + if (max_proto >= PSMOUSE_IMPS &&
> + psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
> + &max_proto, set_properties, true)) {
> + return PSMOUSE_IMPS;
> + }
> +
> + /*
> + * Okay, all failed, we have a standard mouse here. The number of
> + * the buttons is still a question, though. We assume 3.
> + */
> + psmouse_try_protocol(psmouse, PSMOUSE_PS2,
> + &max_proto, set_properties, true);
> +
> + if (synaptics_hardware) {
> + /*
> + * We detected Synaptics hardware but it did not respond to
> + * IMPS/2 probes. We need to reset the touchpad because if
> + * there is a track point on the pass through port it could
> + * get disabled while probing for protocol extensions.
> + */
> + psmouse_reset(psmouse);
> + }
> +
> + return PSMOUSE_PS2;
> +}
>
> /*
> * psmouse_probe() probes for a PS/2 mouse.
>
90 (95?) % of the change here seems to be just moving code around, can
you please split this into 2 commits, one which only moves the function
blocks as is as a preparation patch and one doing the actual changes ?
Regards,
Hans
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