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Date: Sun, 2 Nov 2014 00:25:10 +0100
From: Pali Rohár <pali.rohar@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
Hans de Goede <hdegoede@...hat.com>,
Yunkang Tang <yunkang.tang@...alps.com>,
Tommy Will <tommywill2011@...il.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
Pali Rohár <pali.rohar@...il.com>
Subject: [PATCH v3 4/4] input: alps: Fix trackstick detection
On some laptops after starting them from off state (not after reboot), function
alps_probe_trackstick_v3() (called from function alps_identify()) does not
detect trackstick. To fix this problem we need to reset device. But function
alps_identify() is called also from alps_detect() and we do not want to reset
device in detect function because it will slow down initialization of all other
non alps devices.
Current alps device init sequence is:
alps_detect() --> alps_identify() (trackstick not detected)
alps_init() --> psmouse_reset() --> alps_identify() (trackstick detected)
This patch moves initialization code between driver functions so we can remove
alps_identify() call from alps_detect(). Which means that trackstick function
alps_probe_trackstick_v3() will be called only from alps_init() and only after
device reset so it will always return correct information about trackstick
presence. Code for identifying protocol version is moved to alps_init() and
because psmouse-base.c calling alps_detect() and alps_init() consecutively then
detection of both alps and also other non alps devices will not be broken.
First this patch moves code between functions:
* Move calling function alps_probe_trackstick_v3() (for rushmore devices) from
alps_identify() to alps_hw_init_rushmore_v3()
* Move code for checking "E6 report" from alps_identify() to alps_detect()
* Move code for setting correct device name string and model/protocol version
from alps_detect() to alps_init(). To not break psmouse-base.c in function
alps_detect() set only generic name "DualPoint TouchPad".
Next it removes alps_identify() from alps_detect() because it is not needed
anymore (code which use it was moved to alps_init()).
And last this patch fix another code for trackstick detection of protocol V3
devices. In function alps_hw_init_v3() is removed ALPS_DUALPOINT flag from
device if alps_setup_trackstick_v3() or alps_setup_trackstick_v3() returns
-ENODEV (which means trackstick is not present).
Now trackstick detection should work and in function alps_init() is set
correct name and other properties for both input devices.
Side effect of this patch is also faster alps devices initialization because
function alps_identify() is called only once (from alps_init()).
Signed-off-by: Pali Rohár <pali.rohar@...il.com>
Tested-by: Pali Rohár <pali.rohar@...il.com>
Cc: stable@...r.kernel.org
---
drivers/input/mouse/alps.c | 96 +++++++++++++++++++++++++++++---------------
1 file changed, 64 insertions(+), 32 deletions(-)
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index e802d28..04161b6 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -1732,6 +1732,7 @@ error:
static int alps_hw_init_v3(struct psmouse *psmouse)
{
+ struct alps_data *priv = psmouse->private;
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val;
unsigned char param[4];
@@ -1740,9 +1741,15 @@ static int alps_hw_init_v3(struct psmouse *psmouse)
if (reg_val == -EIO)
goto error;
- if (reg_val == 0 &&
- alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
- goto error;
+ if (reg_val == 0) {
+ reg_val = alps_setup_trackstick_v3(psmouse,
+ ALPS_REG_BASE_PINNACLE);
+ if (reg_val == -EIO)
+ goto error;
+ }
+
+ if (reg_val == -ENODEV)
+ priv->flags &= ~ALPS_DUALPOINT;
if (alps_enter_command_mode(psmouse) ||
alps_absolute_mode_v3(psmouse)) {
@@ -1849,15 +1856,20 @@ static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
struct ps2dev *ps2dev = &psmouse->ps2dev;
int reg_val, ret = -1;
- if (priv->flags & ALPS_DUALPOINT) {
+ reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE);
+ if (reg_val == -EIO)
+ goto error;
+
+ if (reg_val == 0) {
reg_val = alps_setup_trackstick_v3(psmouse,
ALPS_REG_BASE_RUSHMORE);
if (reg_val == -EIO)
goto error;
- if (reg_val == -ENODEV)
- priv->flags &= ~ALPS_DUALPOINT;
}
+ if (reg_val == -ENODEV)
+ priv->flags &= ~ALPS_DUALPOINT;
+
if (alps_enter_command_mode(psmouse) ||
alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
@@ -2176,20 +2188,15 @@ static int alps_match_table(struct psmouse *psmouse, struct alps_data *priv,
static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
{
- unsigned char e6[4], e7[4], ec[4];
+ unsigned char e7[4], ec[4];
+ int ret;
/*
* First try "E6 report".
- * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
- * The bits 0-2 of the first byte will be 1s if some buttons are
- * pressed.
*/
- if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
- PSMOUSE_CMD_SETSCALE11, e6))
- return -EIO;
-
- if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
- return -EINVAL;
+ ret = alps_detect(psmouse, false);
+ if (ret < 0)
+ return ret;
/*
* Now get the "E7" and "EC" reports. These will uniquely identify
@@ -2231,12 +2238,6 @@ static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
priv->y_bits = 12;
priv->flags |= ALPS_IS_RUSHMORE;
- /* hack to make addr_command, nibble_command available */
- psmouse->private = priv;
-
- if (alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_RUSHMORE))
- priv->flags &= ~ALPS_DUALPOINT;
-
return 0;
} else if (ec[0] == 0x88 && ec[1] == 0x07 &&
ec[2] >= 0x90 && ec[2] <= 0x9d) {
@@ -2370,14 +2371,24 @@ int alps_init(struct psmouse *psmouse)
dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
}
+ if (priv->flags & ALPS_DUALPOINT) {
+ /*
+ * format of device name is: "protocol vendor name"
+ * see function psmouse_switch_protocol() in psmouse-base.c
+ */
+ dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
+ dev2->id.product = PSMOUSE_ALPS;
+ dev2->id.version = priv->proto_version;
+ } else {
+ dev2->name = "PS/2 ALPS Mouse";
+ dev2->id.product = PSMOUSE_PS2;
+ dev2->id.version = 0x0000;
+ }
+
snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
dev2->phys = priv->phys;
- dev2->name = (priv->flags & ALPS_DUALPOINT) ?
- "DualPoint Stick" : "ALPS PS/2 Device";
dev2->id.bustype = BUS_I8042;
dev2->id.vendor = 0x0002;
- dev2->id.product = PSMOUSE_ALPS;
- dev2->id.version = 0x0000;
dev2->dev.parent = &psmouse->ps2dev.serio->dev;
dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
@@ -2392,6 +2403,10 @@ int alps_init(struct psmouse *psmouse)
if (input_register_device(priv->dev2))
goto init_fail;
+ if (!(priv->flags & ALPS_DUALPOINT))
+ psmouse->name = "GlidePoint TouchPad";
+ psmouse->model = priv->proto_version;
+
psmouse->protocol_handler = alps_process_byte;
psmouse->poll = alps_poll;
psmouse->disconnect = alps_disconnect;
@@ -2416,17 +2431,34 @@ init_fail:
int alps_detect(struct psmouse *psmouse, bool set_properties)
{
- struct alps_data dummy;
+ unsigned char e6[4];
- if (alps_identify(psmouse, &dummy) < 0)
- return -1;
+ /*
+ * Try "E6 report".
+ * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
+ * The bits 0-2 of the first byte will be 1s if some buttons are
+ * pressed.
+ */
+ if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
+ PSMOUSE_CMD_SETSCALE11, e6))
+ return -EIO;
+
+ if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
+ return -EINVAL;
if (set_properties) {
+ /*
+ * NOTE: To detect model and trackstick presence we need to do
+ * full device reset. To speed up detection and prevent
+ * calling duplicate initialization sequence (both in
+ * alps_detect() and alps_init()) we set model/protocol
+ * version and correct name in alps_init() (which will
+ * do full device reset). For now set name to DualPoint.
+ */
psmouse->vendor = "ALPS";
- psmouse->name = dummy.flags & ALPS_DUALPOINT ?
- "DualPoint TouchPad" : "GlidePoint";
- psmouse->model = dummy.proto_version << 8;
+ psmouse->name = "DualPoint TouchPad";
}
+
return 0;
}
--
1.7.9.5
--
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