Hi Chris,
On Mon, Dec 28, 2015 at 03:15:36AM +0000, chris@xxxxxxxxxxx wrote:
> From: Chris Diamand <chris@xxxxxxxxxxx>
>
> Driver for the BYD BTP10463 touchpad. This patch sends the magic
> command sequence to enable gesture recognition, and interprets the
> resulting intellimouse-style packets.
>
> At present, this supports two-finger vertical and horizontal
> scrolling, and provides the framework to expose the other gestures
> recognized by the touchpad.
Could you please tell me what boxes use this touchpad?
>
> Signed-off-by: Chris Diamand <chris@xxxxxxxxxxx>
> ---
> drivers/input/mouse/Kconfig | 10 ++
> drivers/input/mouse/Makefile | 1 +
> drivers/input/mouse/byd.c | 344 +++++++++++++++++++++++++++++++++++++
> drivers/input/mouse/byd.h | 18 ++
> drivers/input/mouse/psmouse-base.c | 16 ++
> drivers/input/mouse/psmouse.h | 1 +
> 6 files changed, 390 insertions(+)
> create mode 100644 drivers/input/mouse/byd.c
> create mode 100644 drivers/input/mouse/byd.h
>
> diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
> index 17f97e5..096abb4 100644
> --- a/drivers/input/mouse/Kconfig
> +++ b/drivers/input/mouse/Kconfig
> @@ -48,6 +48,16 @@ config MOUSE_PS2_ALPS
>
> If unsure, say Y.
>
> +config MOUSE_PS2_BYD
> + bool "BYD PS/2 mouse protocol extension" if EXPERT
> + default y
> + depends on MOUSE_PS2
> + help
> + Say Y here if you have a BYD PS/2 touchpad connected to
> + your system.
> +
> + If unsure, say Y.
> +
> config MOUSE_PS2_LOGIPS2PP
> bool "Logitech PS/2++ mouse protocol extension" if EXPERT
> default y
> diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
> index ee6a6e9..6168b13 100644
> --- a/drivers/input/mouse/Makefile
> +++ b/drivers/input/mouse/Makefile
> @@ -28,6 +28,7 @@ cyapatp-objs := cyapa.o cyapa_gen3.o cyapa_gen5.o cyapa_gen6.o
> psmouse-objs := psmouse-base.o synaptics.o focaltech.o
>
> psmouse-$(CONFIG_MOUSE_PS2_ALPS) += alps.o
> +psmouse-$(CONFIG_MOUSE_PS2_BYD) += byd.o
> psmouse-$(CONFIG_MOUSE_PS2_ELANTECH) += elantech.o
> psmouse-$(CONFIG_MOUSE_PS2_OLPC) += hgpk.o
> psmouse-$(CONFIG_MOUSE_PS2_LOGIPS2PP) += logips2pp.o
> diff --git a/drivers/input/mouse/byd.c b/drivers/input/mouse/byd.c
> new file mode 100644
> index 0000000..6441de1
> --- /dev/null
> +++ b/drivers/input/mouse/byd.c
> @@ -0,0 +1,344 @@
> +/*
> + * BYD TouchPad PS/2 mouse driver
> + *
> + * Copyright (C) 2015 Chris Diamand <chris@xxxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published by
> + * the Free Software Foundation.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/input.h>
> +#include <linux/libps2.h>
> +#include <linux/serio.h>
> +
> +#include "psmouse.h"
> +#include "byd.h"
> +
> +#define PS2_Y_OVERFLOW (0x1 << 7)
> +#define PS2_X_OVERFLOW (0x1 << 6)
> +#define PS2_Y_SIGN (0x1 << 5)
> +#define PS2_X_SIGN (0x1 << 4)
> +#define PS2_ALWAYS_1 (0x1 << 3)
> +#define PS2_MIDDLE (0x1 << 2)
> +#define PS2_RIGHT (0x1 << 1)
> +#define PS2_LEFT (0x1 << 0)
We have nice BIT() macro for these.
> +
> +enum bydscroll {
> + BYD_SCROLLUP = 0xCA,
> + BYD_SCROLLDOWN = 0x36,
> + BYD_SCROLLLEFT = 0xCB,
> + BYD_SCROLLRIGHT = 0x35,
> + BYD_2DOWN = 0x2B,
> + BYD_2UP = 0xD5,
> + BYD_2LEFT = 0xD6,
> + BYD_2RIGHT = 0x2A,
> + BYD_ZOOMOUT = 0xD8,
> + BYD_ZOOMIN = 0x28,
> + BYD_3UP = 0xD3,
> + BYD_3DOWN = 0x2D,
> + BYD_3LEFT = 0xD4,
> + BYD_3RIGHT = 0x2C,
> + BYD_4UP = 0xCD,
> + BYD_4DOWN = 0x33
> +};
This represents raw data from the wire, I'd rather have it as #defines
and u8 instead of enum. Also if you could document the meaning of these
codes that would be great.
> +
> +int byd_detect(struct psmouse *psmouse, bool set_properties)
> +{
> + struct ps2dev *ps2dev = &psmouse->ps2dev;
> + unsigned char param[4];
> +
> + param[0] = 0x03;
> + param[1] = 0x00;
> + param[2] = 0x00;
> + param[3] = 0x00;
> +
> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
> + return -1;
> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
> + return -1;
> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
> + return -1;
> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES))
> + return -1;
> + if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
> + return -1;
> +
> + if (param[1] != 0x03 || param[2] != 0x64)
> + return -ENODEV;
> +
> + psmouse_info(psmouse, "BYD touchpad detected\n");
psmouse_dbg() please: input core will emit log message with touchpad
details for us.
> +
> + if (set_properties) {
> + psmouse->vendor = "BYD";
> + psmouse->name = "TouchPad";
> + }
> +
> + return 0;
> +}
> +
> +static void report_buttons(struct psmouse *psmouse)
> +{
> + u8 b = psmouse->packet[0];
> +
> + input_report_key(psmouse->dev, BTN_LEFT, b & PS2_LEFT);
> + input_report_key(psmouse->dev, BTN_RIGHT, b & PS2_RIGHT);
> + input_report_key(psmouse->dev, BTN_MIDDLE, b & PS2_MIDDLE);
> +}
> +
> +static int interpret_scroll(struct psmouse *psmouse)
> +{
> + struct input_dev *dev = psmouse->dev;
> + enum bydscroll scroll = psmouse->packet[3];
> +
> + switch (scroll) {
> + case BYD_SCROLLDOWN:
> + case BYD_2DOWN:
> + input_report_rel(dev, REL_WHEEL, -1);
> + return 1;
> + case BYD_SCROLLUP:
> + case BYD_2UP:
> + input_report_rel(dev, REL_WHEEL, 1);
> + return 1;
> + case BYD_SCROLLLEFT:
> + case BYD_2LEFT:
> + input_report_rel(dev, REL_HWHEEL, -1);
> + return 1;
> + case BYD_SCROLLRIGHT:
> + case BYD_2RIGHT:
> + input_report_rel(dev, REL_HWHEEL, 1);
> + return 1;
> + case BYD_ZOOMOUT:
> + case BYD_ZOOMIN:
> + case BYD_3UP:
> + case BYD_3DOWN:
> + case BYD_3LEFT:
> + case BYD_3RIGHT:
> + case BYD_4UP:
> + case BYD_4DOWN:
> + return 1;
> + }
Hmm, so the touchpad can't report absolute coordinates for us? That's
unfortunate.
> +
> + if (scroll != 0) {
> + psmouse_warn(psmouse,
> + "Unrecognized Z: pkt = %02x %02x %02x %02x\n",
> + psmouse->packet[0], psmouse->packet[1],
> + psmouse->packet[2], psmouse->packet[3]);
> + return 1;
> + }
> + return 0;
> +}
> +
> +static psmouse_ret_t byd_process_byte(struct psmouse *psmouse)
> +{
> + u8 *pkt = psmouse->packet;
> +
> + if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) {
> + psmouse_warn(psmouse, "Always_1 bit not 1. pkt[0] = %02x\n",
> + pkt[0]);
> + return PSMOUSE_BAD_DATA;
> + }
> +
> + if (psmouse->pktcnt < psmouse->pktsize)
> + return PSMOUSE_GOOD_DATA;
> +
> + /* Otherwise, a full packet has been received */
> + if (!interpret_scroll(psmouse)) {
> + /* Sign-extend if a sign bit is set. */
> + unsigned int signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0;
> + unsigned int signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0;
> + int dx = signx | (int) pkt[1];
> + int dy = signy | (int) pkt[2];
> +
> + report_buttons(psmouse);
> +
> + input_report_rel(psmouse->dev, REL_X, dx);
> + input_report_rel(psmouse->dev, REL_Y, -dy);
> + }
I am curious why you split reportign like that; I;d kept it together
in the single function.
> +
> + input_sync(psmouse->dev);
> +
> + return PSMOUSE_FULL_PACKET;
> +}
> +
> +/* Send a sequence of bytes, where each is ACKed before the next is sent. */
> +static int send_sequence(struct psmouse *psmouse, const u8 *seq, size_t len)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < len; ++i) {
> + if (ps2_command(&psmouse->ps2dev, NULL, seq[i]))
> + return -1;
> + }
> + return 0;
> +}
> +
> +/* Keep scrolling after fingers are removed. */
> +#define SCROLL_INERTIAL 0x01
> +#define SCROLL_NO_INERTIAL 0x02
> +
> +/* Clicking can be done by tapping or pressing. */
> +#define CLICK_BOTH 0x01
> +/* Clicking can only be done by pressing. */
> +#define CLICK_PRESS_ONLY 0x02
> +
> +static int byd_enable(struct psmouse *psmouse)
> +{
> + const u8 seq1[] = { 0xE2, 0x00, 0xE0, 0x02, 0xE0 };
> + const u8 seq2[] = {
> + 0xD3, 0x01,
> + 0xD0, 0x00,
> + 0xD0, 0x04,
> + /* Whether clicking is done by tapping or pressing. */
> + 0xD4, CLICK_PRESS_ONLY,
> + 0xD5, 0x01,
> + 0xD7, 0x03,
> + /* Vertical and horizontal one-finger scroll zone inertia. */
> + 0xD8, SCROLL_INERTIAL,
> + 0xDA, 0x05,
> + 0xDB, 0x02,
> + 0xE4, 0x05,
> + 0xD6, 0x01,
> + 0xDE, 0x04,
> + 0xE3, 0x01,
> + 0xCF, 0x00,
> + 0xD2, 0x03,
> + /* Vertical and horizontal two-finger scrolling inertia. */
> + 0xE5, SCROLL_INERTIAL,
> + 0xD9, 0x02,
> + 0xD9, 0x07,
> + 0xDC, 0x03,
> + 0xDD, 0x03,
> + 0xDF, 0x03,
> + 0xE1, 0x03,
> + 0xD1, 0x00,
> + 0xCE, 0x00,
> + 0xCC, 0x00,
> + 0xE0, 0x00,
> + 0xE2, 0x01
> + };
> + u8 param[4];
> +
> + if (send_sequence(psmouse, seq1, sizeof(seq1) / sizeof(*seq1)))
ARRAY_SIZE().
> + return -1;
> +
> + /* Send a 0x01 command, which should return 4 bytes. */
> + if (ps2_command(&psmouse->ps2dev, param, 0x0401))
> + return -1;
> +
> + if (send_sequence(psmouse, seq2, sizeof(seq2) / sizeof(*seq2)))
> + return -1;
> +
> + return 0;
> +}
> +
> +static int send_intellimouse_sequence(struct psmouse *psmouse)
> +{
> + struct ps2dev *ps2dev = &psmouse->ps2dev;
> + u8 param[4];
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_RESET_BAT);
> + ps2_command(ps2dev, param, PSMOUSE_CMD_RESET_BAT);
> + ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11);
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11);
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETSCALE11);
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
> +
> + param[0] = 0x03;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
> +
> + param[0] = 0xC8;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> + param[0] = 0x64;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> + param[0] = 0x50;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
> +
> + param[0] = 0xC8;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> + param[0] = 0xC8;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> + param[0] = 0x50;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
> +
> + param[0] = 0x64;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
> + param[0] = 0x03;
> + ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
> +
> + ps2_command(ps2dev, param, PSMOUSE_CMD_ENABLE);
Should we check results of any of the above commands?
> +
> + return 0;
> +}
> +
> +static int reset_touchpad(struct psmouse *psmouse)
> +{
> + if (send_intellimouse_sequence(psmouse))
> + return -EIO;
> +
> + if (byd_enable(psmouse))
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int byd_reconnect(struct psmouse *psmouse)
> +{
> + int retry = 0, error = 0;
> +
> + psmouse_info(psmouse, "Reconnect\n");
> + do {
> + psmouse_reset(psmouse);
> + if (retry)
> + ssleep(1);
> + error = byd_detect(psmouse, 0);
> + } while (error && ++retry < 3);
> +
> + if (error)
> + return error;
> + psmouse_info(psmouse, "Reconnected after %d attempts\n", retry);
> +
> + error = reset_touchpad(psmouse);
> + if (error) {
> + psmouse_err(psmouse, "Unable to initialize device\n");
> + return error;
> + }
> +
> + return 0;
> +}
> +
> +int byd_init(struct psmouse *psmouse)
> +{
> + struct input_dev *dev = psmouse->dev;
> +
> + if (psmouse_reset(psmouse))
> + return -EIO;
> + if (reset_touchpad(psmouse))
> + return -EIO;
> +
> + psmouse->reconnect = byd_reconnect;
> + psmouse->protocol_handler = byd_process_byte;
> + psmouse->pktsize = 4;
> + psmouse->resync_time = 0;
> +
> + __set_bit(EV_KEY, dev->evbit);
> + __set_bit(BTN_LEFT, dev->keybit);
> + __set_bit(BTN_MIDDLE, dev->keybit);
> + __set_bit(BTN_RIGHT, dev->keybit);
> +
> + __set_bit(EV_REL, dev->evbit);
> + __set_bit(REL_WHEEL, dev->relbit);
> + __set_bit(REL_HWHEEL, dev->relbit);
> +
> + __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
This property does not make sense for relative devices.
> +
> + return 0;
> +}
> diff --git a/drivers/input/mouse/byd.h b/drivers/input/mouse/byd.h
> new file mode 100644
> index 0000000..d6c120c
> --- /dev/null
> +++ b/drivers/input/mouse/byd.h
> @@ -0,0 +1,18 @@
> +#ifndef _BYD_H
> +#define _BYD_H
> +
> +#ifdef CONFIG_MOUSE_PS2_BYD
> +int byd_detect(struct psmouse *psmouse, bool set_properties);
> +int byd_init(struct psmouse *psmouse);
> +#else
> +static inline int byd_detect(struct psmouse *psmouse, bool set_properties)
> +{
> + return -ENOSYS;
> +}
> +static inline int byd_init(struct psmouse *psmouse)
> +{
> + return -ENOSYS;
> +}
> +#endif /* CONFIG_MOUSE_PS2_BYD */
> +
> +#endif /* _BYD_H */
> diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
> index ad18dab..439be98 100644
> --- a/drivers/input/mouse/psmouse-base.c
> +++ b/drivers/input/mouse/psmouse-base.c
> @@ -37,6 +37,7 @@
> #include "cypress_ps2.h"
> #include "focaltech.h"
> #include "vmmouse.h"
> +#include "byd.h"
>
> #define DRIVER_DESC "PS/2 mouse driver"
>
> @@ -904,6 +905,12 @@ static int psmouse_extensions(struct psmouse *psmouse,
> max_proto = PSMOUSE_IMEX;
> }
>
> + if (max_proto > PSMOUSE_IMEX &&
> + psmouse_do_detect(byd_detect, psmouse, set_properties) == 0) {
> + if (!set_properties || byd_init(psmouse) == 0)
> + return PSMOUSE_BYD;
> + }
> +
It looks like you are patching against older kernel. Can you please send
me next version against linux-next?
> if (max_proto > PSMOUSE_IMEX) {
> if (psmouse_do_detect(genius_detect,
> psmouse, set_properties) == 0)
> @@ -1056,6 +1063,15 @@ static const struct psmouse_protocol psmouse_protocols[] = {
> .init = alps_init,
> },
> #endif
> +#ifdef CONFIG_MOUSE_PS2_BYD
> + {
> + .type = PSMOUSE_BYD,
> + .name = "BydPS/2",
> + .alias = "byd",
> + .detect = byd_detect,
> + .init = byd_init
> + },
> +#endif
> #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
> {
> .type = PSMOUSE_LIFEBOOK,
> diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
> index ad5a5a1..e0ca6cd 100644
> --- a/drivers/input/mouse/psmouse.h
> +++ b/drivers/input/mouse/psmouse.h
> @@ -104,6 +104,7 @@ enum psmouse_type {
> PSMOUSE_CYPRESS,
> PSMOUSE_FOCALTECH,
> PSMOUSE_VMMOUSE,
> + PSMOUSE_BYD,
> PSMOUSE_AUTO /* This one should always be last */
> };
>
> --
> 2.1.4
>
Thanks.
--
Dmitry
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