| Message ID | 1415833233-1863-1-git-send-email-mgottschlag@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Nov 13, 2014 at 12:00:33AM +0100, Mathias Gottschlag wrote: > Most of the protocol for these touchpads has been reverse engineered. This > commit adds a basic multitouch-capable driver. > > A lot of the protocol is still unknown. Especially, we don't know how to > identify the device yet apart from the PNP ID. > > The previous workaround for these devices has been left in place in case > the driver is not compiled into the kernel or in case some other device > with the same PNP ID is not recognized by the driver yet still has the same > problems with the device probing code. > > Signed-off-by: Mathias Gottschlag <mgottschlag@gmail.com> > Reviewed-by: Hans de Goede <hdegoede@redhat.com> Applied, sorry for the delay. > --- > > (Resent with the correct subject to prevent confusion, sorry, this is v5) > Various smaller changes as requested. Also, accidentally pressing the touchpad > disable button can cause really frustrating debugging sessions. > > drivers/input/mouse/Kconfig | 10 ++ > drivers/input/mouse/focaltech.c | 313 ++++++++++++++++++++++++++++++++++++- > drivers/input/mouse/focaltech.h | 60 +++++++ > drivers/input/mouse/psmouse-base.c | 32 ++-- > drivers/input/mouse/psmouse.h | 1 + > 5 files changed, 399 insertions(+), 17 deletions(-) > > diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig > index 366fc7a..db973e5 100644 > --- a/drivers/input/mouse/Kconfig > +++ b/drivers/input/mouse/Kconfig > @@ -146,6 +146,16 @@ config MOUSE_PS2_OLPC > > If unsure, say N. > > +config MOUSE_PS2_FOCALTECH > + bool "FocalTech PS/2 mouse protocol extension" if EXPERT > + default y > + depends on MOUSE_PS2 > + help > + Say Y here if you have a FocalTech PS/2 TouchPad connected to > + your system. > + > + If unsure, say Y. > + > config MOUSE_SERIAL > tristate "Serial mouse" > select SERIO > diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c > index f4d657e..f838cab4 100644 > --- a/drivers/input/mouse/focaltech.c > +++ b/drivers/input/mouse/focaltech.c > @@ -2,6 +2,7 @@ > * Focaltech TouchPad PS/2 mouse driver > * > * Copyright (c) 2014 Red Hat Inc. > + * Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com> > * > * This program is free software; you can redistribute it and/or modify > * it under the terms of the GNU General Public License as published by > @@ -13,15 +14,14 @@ > * Hans de Goede <hdegoede@redhat.com> > */ > > -/* > - * The Focaltech PS/2 touchpad protocol is unknown. This drivers deals with > - * detection only, to avoid further detection attempts confusing the touchpad > - * this way it at least works in PS/2 mouse compatibility mode. > - */ > > #include <linux/device.h> > #include <linux/libps2.h> > +#include <linux/input/mt.h> > +#include <linux/serio.h> > +#include <linux/slab.h> > #include "psmouse.h" > +#include "focaltech.h" > > static const char * const focaltech_pnp_ids[] = { > "FLT0101", > @@ -30,6 +30,12 @@ static const char * const focaltech_pnp_ids[] = { > NULL > }; > > +/* > + * Even if the kernel is built without support for Focaltech PS/2 touchpads (or > + * when the real driver fails to recognize the device), we still have to detect > + * them in order to avoid further detection attempts confusing the touchpad. > + * This way it at least works in PS/2 mouse compatibility mode. > + */ > int focaltech_detect(struct psmouse *psmouse, bool set_properties) > { > if (!psmouse_matches_pnp_id(psmouse, focaltech_pnp_ids)) > @@ -37,16 +43,309 @@ int focaltech_detect(struct psmouse *psmouse, bool set_properties) > > if (set_properties) { > psmouse->vendor = "FocalTech"; > - psmouse->name = "FocalTech Touchpad in mouse emulation mode"; > + psmouse->name = "FocalTech Touchpad"; > } > > return 0; > } > > -int focaltech_init(struct psmouse *psmouse) > +static void focaltech_reset(struct psmouse *psmouse) > { > ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); > psmouse_reset(psmouse); > +} > + > +#ifdef CONFIG_MOUSE_PS2_FOCALTECH > + > +static void focaltech_report_state(struct psmouse *psmouse) > +{ > + int i; > + struct focaltech_data *priv = psmouse->private; > + struct focaltech_hw_state *state = &priv->state; > + struct input_dev *dev = psmouse->dev; > + > + for (i = 0; i < FOC_MAX_FINGERS; i++) { > + struct focaltech_finger_state *finger = &state->fingers[i]; > + bool active = finger->active && finger->valid; > + input_mt_slot(dev, i); > + input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); > + if (active) { > + input_report_abs(dev, ABS_MT_POSITION_X, finger->x); > + input_report_abs(dev, ABS_MT_POSITION_Y, > + focaltech_invert_y(finger->y)); > + } > + } > + input_mt_report_pointer_emulation(dev, true); > + > + input_report_key(psmouse->dev, BTN_LEFT, state->pressed); > + input_sync(psmouse->dev); > +} > + > +static void process_touch_packet(struct focaltech_hw_state *state, > + unsigned char *packet) > +{ > + int i; > + unsigned char fingers = packet[1]; > + > + state->pressed = (packet[0] >> 4) & 1; > + /* the second byte contains a bitmap of all fingers touching the pad */ > + for (i = 0; i < FOC_MAX_FINGERS; i++) { > + state->fingers[i].active = fingers & 0x1; > + if (!state->fingers[i].active) { > + /* even when the finger becomes active again, we still > + * will have to wait for the first valid position */ > + state->fingers[i].valid = false; > + } > + fingers >>= 1; > + } > +} > + > +static void process_abs_packet(struct psmouse *psmouse, > + unsigned char *packet) > +{ > + struct focaltech_data *priv = psmouse->private; > + struct focaltech_hw_state *state = &priv->state; > + unsigned int finger; > + > + finger = (packet[1] >> 4) - 1; > + if (finger >= FOC_MAX_FINGERS) { > + psmouse_err(psmouse, "Invalid finger in abs packet: %d", > + finger); > + return; > + } > + > + state->pressed = (packet[0] >> 4) & 1; > + /* > + * packet[5] contains some kind of tool size in the most significant > + * nibble. 0xff is a special value (latching) that signals a large > + * contact area. > + */ > + if (packet[5] == 0xff) { > + state->fingers[finger].valid = false; > + return; > + } > + state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2]; > + state->fingers[finger].y = (packet[3] << 8) | packet[4]; > + state->fingers[finger].valid = true; > +} > + > +static void process_rel_packet(struct psmouse *psmouse, > + unsigned char *packet) > +{ > + struct focaltech_data *priv = psmouse->private; > + struct focaltech_hw_state *state = &priv->state; > + int finger1, finger2; > + > + state->pressed = packet[0] >> 7; > + finger1 = ((packet[0] >> 4) & 0x7) - 1; > + if (finger1 < FOC_MAX_FINGERS) { > + state->fingers[finger1].x += (char)packet[1]; > + state->fingers[finger1].y += (char)packet[2]; > + } else { > + psmouse_err(psmouse, "First finger in rel packet invalid: %d", > + finger1); > + } > + /* > + * If there is an odd number of fingers, the last relative packet only > + * contains one finger. In this case, the second finger index in the > + * packet is 0 (we subtract 1 in the lines above to create array > + * indices, so the finger will overflow and be above FOC_MAX_FINGERS). > + */ > + finger2 = ((packet[3] >> 4) & 0x7) - 1; > + if (finger2 < FOC_MAX_FINGERS) { > + state->fingers[finger2].x += (char)packet[4]; > + state->fingers[finger2].y += (char)packet[5]; > + } > +} > + > +static void focaltech_process_packet(struct psmouse *psmouse) > +{ > + struct focaltech_data *priv = psmouse->private; > + unsigned char *packet = psmouse->packet; > + > + switch (packet[0] & 0xf) { > + case FOC_TOUCH: > + process_touch_packet(&priv->state, packet); > + break; > + case FOC_ABS: > + process_abs_packet(psmouse, packet); > + break; > + case FOC_REL: > + process_rel_packet(psmouse, packet); > + break; > + default: > + psmouse_err(psmouse, "Unknown packet type: %02x", packet[0]); > + break; > + } > + > + focaltech_report_state(psmouse); > +} > + > +static psmouse_ret_t focaltech_process_byte(struct psmouse *psmouse) > +{ > + if (psmouse->pktcnt >= 6) { /* Full packet received */ > + focaltech_process_packet(psmouse); > + return PSMOUSE_FULL_PACKET; > + } > + /* > + * we might want to do some validation of the data here, but we do not > + * know the protocoll well enough > + */ > + return PSMOUSE_GOOD_DATA; > +} > + > +static int focaltech_switch_protocol(struct psmouse *psmouse) > +{ > + struct ps2dev *ps2dev = &psmouse->ps2dev; > + unsigned char param[3]; > + > + param[0] = 0; > + if (ps2_command(ps2dev, param, 0x10f8)) > + return -EIO; > + if (ps2_command(ps2dev, param, 0x10f8)) > + return -EIO; > + if (ps2_command(ps2dev, param, 0x10f8)) > + return -EIO; > + param[0] = 1; > + if (ps2_command(ps2dev, param, 0x10f8)) > + return -EIO; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) > + return -EIO; > + > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_ENABLE)) > + return -EIO; > + > + return 0; > +} > + > +static void focaltech_disconnect(struct psmouse *psmouse) > +{ > + focaltech_reset(psmouse); > + kfree(psmouse->private); > + psmouse->private = NULL; > +} > + > +static int focaltech_reconnect(struct psmouse *psmouse) > +{ > + focaltech_reset(psmouse); > + if (focaltech_switch_protocol(psmouse)) { > + psmouse_err(psmouse, > + "Unable to initialize the device."); > + return -1; > + } > + return 0; > +} > + > +static void set_input_params(struct psmouse *psmouse) > +{ > + struct input_dev *dev = psmouse->dev; > + struct focaltech_data *priv = psmouse->private; > + > + __set_bit(EV_ABS, dev->evbit); > + input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); > + input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); > + input_mt_init_slots(dev, 5, INPUT_MT_POINTER); > + __clear_bit(EV_REL, dev->evbit); > + __clear_bit(REL_X, dev->relbit); > + __clear_bit(REL_Y, dev->relbit); > + __clear_bit(BTN_RIGHT, dev->keybit); > + __clear_bit(BTN_MIDDLE, dev->keybit); > + __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); > +} > + > +static int focaltech_read_register(struct ps2dev *ps2dev, int reg, > + unsigned char *param) > +{ > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) > + return -EIO; > + param[0] = 0; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) > + return -EIO; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) > + return -EIO; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) > + return -EIO; > + param[0] = reg; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) > + return -EIO; > + if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) > + return -EIO; > + return 0; > +} > + > +static int focaltech_read_size(struct psmouse *psmouse) > +{ > + struct ps2dev *ps2dev = &psmouse->ps2dev; > + struct focaltech_data *priv = psmouse->private; > + char param[3]; > + > + if (focaltech_read_register(ps2dev, 2, param)) > + return -EIO; > + /* not sure whether this is 100% correct */ > + priv->x_max = (unsigned char)param[1] * 128; > + priv->y_max = (unsigned char)param[2] * 128; > + > + return 0; > +} > +int focaltech_init(struct psmouse *psmouse) > +{ > + struct focaltech_data *priv; > + int err; > + > + psmouse->private = priv = kzalloc(sizeof(struct focaltech_data), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + focaltech_reset(psmouse); > + err = focaltech_read_size(psmouse); > + if (err) { > + focaltech_reset(psmouse); > + psmouse_err(psmouse, > + "Unable to read the size of the touchpad."); > + goto fail; > + } > + if (focaltech_switch_protocol(psmouse)) { > + focaltech_reset(psmouse); > + psmouse_err(psmouse, > + "Unable to initialize the device."); > + err = -ENOSYS; > + goto fail; > + } > + > + set_input_params(psmouse); > + > + psmouse->protocol_handler = focaltech_process_byte; > + psmouse->pktsize = 6; > + psmouse->disconnect = focaltech_disconnect; > + psmouse->reconnect = focaltech_reconnect; > + psmouse->cleanup = focaltech_reset; > + /* resync is not supported yet */ > + psmouse->resync_time = 0; > > return 0; > +fail: > + focaltech_reset(psmouse); > + kfree(priv); > + return err; > +} > + > +bool focaltech_supported(void) > +{ > + return true; > } > + > +#else /* CONFIG_MOUSE_PS2_FOCALTECH */ > + > +int focaltech_init(struct psmouse *psmouse) > +{ > + focaltech_reset(psmouse); > + > + return 0; > +} > + > +bool focaltech_supported(void) > +{ > + return false; > +} > + > +#endif /* CONFIG_MOUSE_PS2_FOCALTECH */ > diff --git a/drivers/input/mouse/focaltech.h b/drivers/input/mouse/focaltech.h > index 498650c..bda3241 100644 > --- a/drivers/input/mouse/focaltech.h > +++ b/drivers/input/mouse/focaltech.h > @@ -2,6 +2,7 @@ > * Focaltech TouchPad PS/2 mouse driver > * > * Copyright (c) 2014 Red Hat Inc. > + * Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com> > * > * This program is free software; you can redistribute it and/or modify > * it under the terms of the GNU General Public License as published by > @@ -16,7 +17,66 @@ > #ifndef _FOCALTECH_H > #define _FOCALTECH_H > > +/* > + * Packet types - the numbers are not consecutive, so we might be missing > + * something here. > + */ > +#define FOC_TOUCH 0x3 /* bitmap of active fingers */ > +#define FOC_ABS 0x6 /* absolute position of one finger */ > +#define FOC_REL 0x9 /* relative position of 1-2 fingers */ > + > +#define FOC_MAX_FINGERS 5 > + > +#define FOC_MAX_X 2431 > +#define FOC_MAX_Y 1663 > + > +static inline int focaltech_invert_y(int y) > +{ > + return FOC_MAX_Y - y; > +} > + > +/* > + * Current state of a single finger on the touchpad. > + */ > +struct focaltech_finger_state { > + /* the touchpad has generated a touch event for the finger */ > + bool active; > + /* > + * The touchpad has sent position data for the finger. The flag is 0 > + * when the finger is not active, and there is a time between the first > + * touch event for the finger and the following absolute position > + * packet for the finger where the touchpad has declared the finger to > + * be valid, but we do not have any valid position yet. > + */ > + bool valid; > + /* absolute position (from the bottom left corner) of the finger */ > + unsigned int x; > + unsigned int y; > +}; > + > +/* > + * Description of the current state of the touchpad hardware. > + */ > +struct focaltech_hw_state { > + /* > + * The touchpad tracks the positions of the fingers for us, the array > + * indices correspond to the finger indices returned in the report > + * packages. > + */ > + struct focaltech_finger_state fingers[FOC_MAX_FINGERS]; > + /* > + * True if the clickpad has been pressed. > + */ > + bool pressed; > +}; > + > +struct focaltech_data { > + unsigned int x_max, y_max; > + struct focaltech_hw_state state; > +}; > + > int focaltech_detect(struct psmouse *psmouse, bool set_properties); > int focaltech_init(struct psmouse *psmouse); > +bool focaltech_supported(void); > > #endif > diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c > index 95a3a6e..68469fe 100644 > --- a/drivers/input/mouse/psmouse-base.c > +++ b/drivers/input/mouse/psmouse-base.c > @@ -725,16 +725,19 @@ static int psmouse_extensions(struct psmouse *psmouse, > > /* Always check for focaltech, this is safe as it uses pnp-id matching */ > if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) { > - if (!set_properties || focaltech_init(psmouse) == 0) { > - /* > - * Not supported yet, use bare protocol. > - * 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; > + if (max_proto > PSMOUSE_IMEX) { > + if (!set_properties || focaltech_init(psmouse) == 0) { > + if (focaltech_supported()) > + 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; > + } > } > } > > @@ -1063,6 +1066,15 @@ static const struct psmouse_protocol psmouse_protocols[] = { > .alias = "cortps", > .detect = cortron_detect, > }, > +#ifdef CONFIG_MOUSE_PS2_FOCALTECH > + { > + .type = PSMOUSE_FOCALTECH, > + .name = "FocalTechPS/2", > + .alias = "focaltech", > + .detect = focaltech_detect, > + .init = focaltech_init, > + }, > +#endif > { > .type = PSMOUSE_AUTO, > .name = "auto", > diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h > index f4cf664..c2ff137 100644 > --- a/drivers/input/mouse/psmouse.h > +++ b/drivers/input/mouse/psmouse.h > @@ -96,6 +96,7 @@ enum psmouse_type { > PSMOUSE_FSP, > PSMOUSE_SYNAPTICS_RELATIVE, > PSMOUSE_CYPRESS, > + PSMOUSE_FOCALTECH, > PSMOUSE_AUTO /* This one should always be last */ > }; > > -- > 1.9.1 >
diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig index 366fc7a..db973e5 100644 --- a/drivers/input/mouse/Kconfig +++ b/drivers/input/mouse/Kconfig @@ -146,6 +146,16 @@ config MOUSE_PS2_OLPC If unsure, say N. +config MOUSE_PS2_FOCALTECH + bool "FocalTech PS/2 mouse protocol extension" if EXPERT + default y + depends on MOUSE_PS2 + help + Say Y here if you have a FocalTech PS/2 TouchPad connected to + your system. + + If unsure, say Y. + config MOUSE_SERIAL tristate "Serial mouse" select SERIO diff --git a/drivers/input/mouse/focaltech.c b/drivers/input/mouse/focaltech.c index f4d657e..f838cab4 100644 --- a/drivers/input/mouse/focaltech.c +++ b/drivers/input/mouse/focaltech.c @@ -2,6 +2,7 @@ * Focaltech TouchPad PS/2 mouse driver * * Copyright (c) 2014 Red Hat Inc. + * Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -13,15 +14,14 @@ * Hans de Goede <hdegoede@redhat.com> */ -/* - * The Focaltech PS/2 touchpad protocol is unknown. This drivers deals with - * detection only, to avoid further detection attempts confusing the touchpad - * this way it at least works in PS/2 mouse compatibility mode. - */ #include <linux/device.h> #include <linux/libps2.h> +#include <linux/input/mt.h> +#include <linux/serio.h> +#include <linux/slab.h> #include "psmouse.h" +#include "focaltech.h" static const char * const focaltech_pnp_ids[] = { "FLT0101", @@ -30,6 +30,12 @@ static const char * const focaltech_pnp_ids[] = { NULL }; +/* + * Even if the kernel is built without support for Focaltech PS/2 touchpads (or + * when the real driver fails to recognize the device), we still have to detect + * them in order to avoid further detection attempts confusing the touchpad. + * This way it at least works in PS/2 mouse compatibility mode. + */ int focaltech_detect(struct psmouse *psmouse, bool set_properties) { if (!psmouse_matches_pnp_id(psmouse, focaltech_pnp_ids)) @@ -37,16 +43,309 @@ int focaltech_detect(struct psmouse *psmouse, bool set_properties) if (set_properties) { psmouse->vendor = "FocalTech"; - psmouse->name = "FocalTech Touchpad in mouse emulation mode"; + psmouse->name = "FocalTech Touchpad"; } return 0; } -int focaltech_init(struct psmouse *psmouse) +static void focaltech_reset(struct psmouse *psmouse) { ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); psmouse_reset(psmouse); +} + +#ifdef CONFIG_MOUSE_PS2_FOCALTECH + +static void focaltech_report_state(struct psmouse *psmouse) +{ + int i; + struct focaltech_data *priv = psmouse->private; + struct focaltech_hw_state *state = &priv->state; + struct input_dev *dev = psmouse->dev; + + for (i = 0; i < FOC_MAX_FINGERS; i++) { + struct focaltech_finger_state *finger = &state->fingers[i]; + bool active = finger->active && finger->valid; + input_mt_slot(dev, i); + input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); + if (active) { + input_report_abs(dev, ABS_MT_POSITION_X, finger->x); + input_report_abs(dev, ABS_MT_POSITION_Y, + focaltech_invert_y(finger->y)); + } + } + input_mt_report_pointer_emulation(dev, true); + + input_report_key(psmouse->dev, BTN_LEFT, state->pressed); + input_sync(psmouse->dev); +} + +static void process_touch_packet(struct focaltech_hw_state *state, + unsigned char *packet) +{ + int i; + unsigned char fingers = packet[1]; + + state->pressed = (packet[0] >> 4) & 1; + /* the second byte contains a bitmap of all fingers touching the pad */ + for (i = 0; i < FOC_MAX_FINGERS; i++) { + state->fingers[i].active = fingers & 0x1; + if (!state->fingers[i].active) { + /* even when the finger becomes active again, we still + * will have to wait for the first valid position */ + state->fingers[i].valid = false; + } + fingers >>= 1; + } +} + +static void process_abs_packet(struct psmouse *psmouse, + unsigned char *packet) +{ + struct focaltech_data *priv = psmouse->private; + struct focaltech_hw_state *state = &priv->state; + unsigned int finger; + + finger = (packet[1] >> 4) - 1; + if (finger >= FOC_MAX_FINGERS) { + psmouse_err(psmouse, "Invalid finger in abs packet: %d", + finger); + return; + } + + state->pressed = (packet[0] >> 4) & 1; + /* + * packet[5] contains some kind of tool size in the most significant + * nibble. 0xff is a special value (latching) that signals a large + * contact area. + */ + if (packet[5] == 0xff) { + state->fingers[finger].valid = false; + return; + } + state->fingers[finger].x = ((packet[1] & 0xf) << 8) | packet[2]; + state->fingers[finger].y = (packet[3] << 8) | packet[4]; + state->fingers[finger].valid = true; +} + +static void process_rel_packet(struct psmouse *psmouse, + unsigned char *packet) +{ + struct focaltech_data *priv = psmouse->private; + struct focaltech_hw_state *state = &priv->state; + int finger1, finger2; + + state->pressed = packet[0] >> 7; + finger1 = ((packet[0] >> 4) & 0x7) - 1; + if (finger1 < FOC_MAX_FINGERS) { + state->fingers[finger1].x += (char)packet[1]; + state->fingers[finger1].y += (char)packet[2]; + } else { + psmouse_err(psmouse, "First finger in rel packet invalid: %d", + finger1); + } + /* + * If there is an odd number of fingers, the last relative packet only + * contains one finger. In this case, the second finger index in the + * packet is 0 (we subtract 1 in the lines above to create array + * indices, so the finger will overflow and be above FOC_MAX_FINGERS). + */ + finger2 = ((packet[3] >> 4) & 0x7) - 1; + if (finger2 < FOC_MAX_FINGERS) { + state->fingers[finger2].x += (char)packet[4]; + state->fingers[finger2].y += (char)packet[5]; + } +} + +static void focaltech_process_packet(struct psmouse *psmouse) +{ + struct focaltech_data *priv = psmouse->private; + unsigned char *packet = psmouse->packet; + + switch (packet[0] & 0xf) { + case FOC_TOUCH: + process_touch_packet(&priv->state, packet); + break; + case FOC_ABS: + process_abs_packet(psmouse, packet); + break; + case FOC_REL: + process_rel_packet(psmouse, packet); + break; + default: + psmouse_err(psmouse, "Unknown packet type: %02x", packet[0]); + break; + } + + focaltech_report_state(psmouse); +} + +static psmouse_ret_t focaltech_process_byte(struct psmouse *psmouse) +{ + if (psmouse->pktcnt >= 6) { /* Full packet received */ + focaltech_process_packet(psmouse); + return PSMOUSE_FULL_PACKET; + } + /* + * we might want to do some validation of the data here, but we do not + * know the protocoll well enough + */ + return PSMOUSE_GOOD_DATA; +} + +static int focaltech_switch_protocol(struct psmouse *psmouse) +{ + struct ps2dev *ps2dev = &psmouse->ps2dev; + unsigned char param[3]; + + param[0] = 0; + if (ps2_command(ps2dev, param, 0x10f8)) + return -EIO; + if (ps2_command(ps2dev, param, 0x10f8)) + return -EIO; + if (ps2_command(ps2dev, param, 0x10f8)) + return -EIO; + param[0] = 1; + if (ps2_command(ps2dev, param, 0x10f8)) + return -EIO; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) + return -EIO; + + if (ps2_command(ps2dev, param, PSMOUSE_CMD_ENABLE)) + return -EIO; + + return 0; +} + +static void focaltech_disconnect(struct psmouse *psmouse) +{ + focaltech_reset(psmouse); + kfree(psmouse->private); + psmouse->private = NULL; +} + +static int focaltech_reconnect(struct psmouse *psmouse) +{ + focaltech_reset(psmouse); + if (focaltech_switch_protocol(psmouse)) { + psmouse_err(psmouse, + "Unable to initialize the device."); + return -1; + } + return 0; +} + +static void set_input_params(struct psmouse *psmouse) +{ + struct input_dev *dev = psmouse->dev; + struct focaltech_data *priv = psmouse->private; + + __set_bit(EV_ABS, dev->evbit); + input_set_abs_params(dev, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); + input_set_abs_params(dev, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); + input_mt_init_slots(dev, 5, INPUT_MT_POINTER); + __clear_bit(EV_REL, dev->evbit); + __clear_bit(REL_X, dev->relbit); + __clear_bit(REL_Y, dev->relbit); + __clear_bit(BTN_RIGHT, dev->keybit); + __clear_bit(BTN_MIDDLE, dev->keybit); + __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); +} + +static int focaltech_read_register(struct ps2dev *ps2dev, int reg, + unsigned char *param) +{ + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11)) + return -EIO; + param[0] = 0; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) + return -EIO; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) + return -EIO; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) + return -EIO; + param[0] = reg; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) + return -EIO; + if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) + return -EIO; + return 0; +} + +static int focaltech_read_size(struct psmouse *psmouse) +{ + struct ps2dev *ps2dev = &psmouse->ps2dev; + struct focaltech_data *priv = psmouse->private; + char param[3]; + + if (focaltech_read_register(ps2dev, 2, param)) + return -EIO; + /* not sure whether this is 100% correct */ + priv->x_max = (unsigned char)param[1] * 128; + priv->y_max = (unsigned char)param[2] * 128; + + return 0; +} +int focaltech_init(struct psmouse *psmouse) +{ + struct focaltech_data *priv; + int err; + + psmouse->private = priv = kzalloc(sizeof(struct focaltech_data), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + focaltech_reset(psmouse); + err = focaltech_read_size(psmouse); + if (err) { + focaltech_reset(psmouse); + psmouse_err(psmouse, + "Unable to read the size of the touchpad."); + goto fail; + } + if (focaltech_switch_protocol(psmouse)) { + focaltech_reset(psmouse); + psmouse_err(psmouse, + "Unable to initialize the device."); + err = -ENOSYS; + goto fail; + } + + set_input_params(psmouse); + + psmouse->protocol_handler = focaltech_process_byte; + psmouse->pktsize = 6; + psmouse->disconnect = focaltech_disconnect; + psmouse->reconnect = focaltech_reconnect; + psmouse->cleanup = focaltech_reset; + /* resync is not supported yet */ + psmouse->resync_time = 0; return 0; +fail: + focaltech_reset(psmouse); + kfree(priv); + return err; +} + +bool focaltech_supported(void) +{ + return true; } + +#else /* CONFIG_MOUSE_PS2_FOCALTECH */ + +int focaltech_init(struct psmouse *psmouse) +{ + focaltech_reset(psmouse); + + return 0; +} + +bool focaltech_supported(void) +{ + return false; +} + +#endif /* CONFIG_MOUSE_PS2_FOCALTECH */ diff --git a/drivers/input/mouse/focaltech.h b/drivers/input/mouse/focaltech.h index 498650c..bda3241 100644 --- a/drivers/input/mouse/focaltech.h +++ b/drivers/input/mouse/focaltech.h @@ -2,6 +2,7 @@ * Focaltech TouchPad PS/2 mouse driver * * Copyright (c) 2014 Red Hat Inc. + * Copyright (c) 2014 Mathias Gottschlag <mgottschlag@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -16,7 +17,66 @@ #ifndef _FOCALTECH_H #define _FOCALTECH_H +/* + * Packet types - the numbers are not consecutive, so we might be missing + * something here. + */ +#define FOC_TOUCH 0x3 /* bitmap of active fingers */ +#define FOC_ABS 0x6 /* absolute position of one finger */ +#define FOC_REL 0x9 /* relative position of 1-2 fingers */ + +#define FOC_MAX_FINGERS 5 + +#define FOC_MAX_X 2431 +#define FOC_MAX_Y 1663 + +static inline int focaltech_invert_y(int y) +{ + return FOC_MAX_Y - y; +} + +/* + * Current state of a single finger on the touchpad. + */ +struct focaltech_finger_state { + /* the touchpad has generated a touch event for the finger */ + bool active; + /* + * The touchpad has sent position data for the finger. The flag is 0 + * when the finger is not active, and there is a time between the first + * touch event for the finger and the following absolute position + * packet for the finger where the touchpad has declared the finger to + * be valid, but we do not have any valid position yet. + */ + bool valid; + /* absolute position (from the bottom left corner) of the finger */ + unsigned int x; + unsigned int y; +}; + +/* + * Description of the current state of the touchpad hardware. + */ +struct focaltech_hw_state { + /* + * The touchpad tracks the positions of the fingers for us, the array + * indices correspond to the finger indices returned in the report + * packages. + */ + struct focaltech_finger_state fingers[FOC_MAX_FINGERS]; + /* + * True if the clickpad has been pressed. + */ + bool pressed; +}; + +struct focaltech_data { + unsigned int x_max, y_max; + struct focaltech_hw_state state; +}; + int focaltech_detect(struct psmouse *psmouse, bool set_properties); int focaltech_init(struct psmouse *psmouse); +bool focaltech_supported(void); #endif diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index 95a3a6e..68469fe 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c @@ -725,16 +725,19 @@ static int psmouse_extensions(struct psmouse *psmouse, /* Always check for focaltech, this is safe as it uses pnp-id matching */ if (psmouse_do_detect(focaltech_detect, psmouse, set_properties) == 0) { - if (!set_properties || focaltech_init(psmouse) == 0) { - /* - * Not supported yet, use bare protocol. - * 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; + if (max_proto > PSMOUSE_IMEX) { + if (!set_properties || focaltech_init(psmouse) == 0) { + if (focaltech_supported()) + 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; + } } } @@ -1063,6 +1066,15 @@ static const struct psmouse_protocol psmouse_protocols[] = { .alias = "cortps", .detect = cortron_detect, }, +#ifdef CONFIG_MOUSE_PS2_FOCALTECH + { + .type = PSMOUSE_FOCALTECH, + .name = "FocalTechPS/2", + .alias = "focaltech", + .detect = focaltech_detect, + .init = focaltech_init, + }, +#endif { .type = PSMOUSE_AUTO, .name = "auto", diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h index f4cf664..c2ff137 100644 --- a/drivers/input/mouse/psmouse.h +++ b/drivers/input/mouse/psmouse.h @@ -96,6 +96,7 @@ enum psmouse_type { PSMOUSE_FSP, PSMOUSE_SYNAPTICS_RELATIVE, PSMOUSE_CYPRESS, + PSMOUSE_FOCALTECH, PSMOUSE_AUTO /* This one should always be last */ };