From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: [PATCH] alps: rushmore and v7 resolution support Date: Tue, 29 Jul 2014 10:07:32 +0200 Message-ID: <1406621252-5569-1-git-send-email-hdegoede@redhat.com> Return-path: Received: from mx1.redhat.com ([209.132.183.28]:47348 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751044AbaG2IHn (ORCPT ); Tue, 29 Jul 2014 04:07:43 -0400 Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Dmitry Torokhov Cc: Yunkang Tang , linux-input@vger.kernel.org, Hans de Goede Add support for querying the physical size from the touchpad for rushmore and v7 touchpads, and use that to tell userspace the device resolution. Signed-off-by: Hans de Goede --- drivers/input/mouse/alps.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++ drivers/input/mouse/alps.h | 2 ++ 2 files changed, 50 insertions(+) diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c index ac9fdbd..1531387 100644 --- a/drivers/input/mouse/alps.c +++ b/drivers/input/mouse/alps.c @@ -1783,6 +1783,45 @@ error: return -1; } +static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch) +{ + int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys; + struct alps_data *priv = psmouse->private; + + reg = alps_command_mode_read_reg(psmouse, reg_pitch); + if (reg < 0) + return reg; + + x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ + x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */ + + y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */ + y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */ + + reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1); + if (reg < 0) + return reg; + + x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ + x_electrode = 17 + x_electrode; + + y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */ + y_electrode = 13 + y_electrode; + + x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */ + y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */ + + priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ + priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ + + psmouse_info(psmouse, + "alps: pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n", + x_pitch, y_pitch, x_electrode, y_electrode, + x_phys / 10, y_phys / 10, priv->x_res, priv->y_res); + + return 0; +} + static int alps_hw_init_rushmore_v3(struct psmouse *psmouse) { struct alps_data *priv = psmouse->private; @@ -1803,6 +1842,9 @@ static int alps_hw_init_rushmore_v3(struct psmouse *psmouse) alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00)) goto error; + if (alps_get_v3_v7_resolution(psmouse, 0xc2da)) + goto error; + reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6); if (reg_val == -1) goto error; @@ -1988,6 +2030,9 @@ static int alps_hw_init_v7(struct psmouse *psmouse) alps_command_mode_read_reg(psmouse, 0xc2d9) == -1) goto error; + if (alps_get_v3_v7_resolution(psmouse, 0xc397)) + goto error; + if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) goto error; @@ -2221,6 +2266,9 @@ static void alps_set_abs_params_mt(struct alps_data *priv, input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); + input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res); + input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res); + input_mt_init_slots(dev1, MAX_TOUCHES, INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | INPUT_MT_TRACK | INPUT_MT_SEMI_MT); diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h index a98ac9b..66240b4 100644 --- a/drivers/input/mouse/alps.h +++ b/drivers/input/mouse/alps.h @@ -174,6 +174,8 @@ struct alps_data { int y_max; int x_bits; int y_bits; + unsigned int x_res; + unsigned int y_res; int (*hw_init)(struct psmouse *psmouse); void (*process_packet)(struct psmouse *psmouse); -- 2.0.1