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-rw-r--r--drivers/input/mouse/alps.c254
-rw-r--r--drivers/input/mouse/alps.h1
2 files changed, 228 insertions, 27 deletions
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index b03e7e0b409..f93c2c0daf1 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -5,6 +5,7 @@
* Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
* Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
* Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
+ * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
*
* ALPS detection, tap switching and status querying info is taken from
* tpconfig utility (by C. Scott Ananian and Bruce Kall).
@@ -28,7 +29,6 @@
#define dbg(format, arg...) do {} while (0)
#endif
-
#define ALPS_OLDPROTO 0x01 /* old style input */
#define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */
#define ALPS_PASS 0x04 /* device has a pass-through port */
@@ -37,7 +37,8 @@
#define ALPS_FW_BK_1 0x10 /* front & back buttons present */
#define ALPS_FW_BK_2 0x20 /* front & back buttons present */
#define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */
-
+#define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with
+ 6-byte ALPS packet */
static const struct alps_model_info alps_model_data[] = {
{ { 0x32, 0x02, 0x14 }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
@@ -58,7 +59,9 @@ static const struct alps_model_info alps_model_data[] = {
{ { 0x20, 0x02, 0x0e }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
{ { 0x22, 0x02, 0x0a }, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
{ { 0x22, 0x02, 0x14 }, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
- { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude E6500 */
+ /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
+ { { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
+ ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
{ { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
};
@@ -69,20 +72,88 @@ static const struct alps_model_info alps_model_data[] = {
*/
/*
- * ALPS abolute Mode - new format
+ * PS/2 packet format
+ *
+ * byte 0: 0 0 YSGN XSGN 1 M R L
+ * byte 1: X7 X6 X5 X4 X3 X2 X1 X0
+ * byte 2: Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
+ *
+ * Note that the device never signals overflow condition.
+ *
+ * ALPS absolute Mode - new format
*
* byte 0: 1 ? ? ? 1 ? ? ?
* byte 1: 0 x6 x5 x4 x3 x2 x1 x0
- * byte 2: 0 x10 x9 x8 x7 ? fin ges
+ * byte 2: 0 x10 x9 x8 x7 ? fin ges
* byte 3: 0 y9 y8 y7 1 M R L
* byte 4: 0 y6 y5 y4 y3 y2 y1 y0
* byte 5: 0 z6 z5 z4 z3 z2 z1 z0
*
+ * Dualpoint device -- interleaved packet format
+ *
+ * byte 0: 1 1 0 0 1 1 1 1
+ * byte 1: 0 x6 x5 x4 x3 x2 x1 x0
+ * byte 2: 0 x10 x9 x8 x7 0 fin ges
+ * byte 3: 0 0 YSGN XSGN 1 1 1 1
+ * byte 4: X7 X6 X5 X4 X3 X2 X1 X0
+ * byte 5: Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
+ * byte 6: 0 y9 y8 y7 1 m r l
+ * byte 7: 0 y6 y5 y4 y3 y2 y1 y0
+ * byte 8: 0 z6 z5 z4 z3 z2 z1 z0
+ *
+ * CAPITALS = stick, miniscules = touchpad
+ *
* ?'s can have different meanings on different models,
* such as wheel rotation, extra buttons, stick buttons
* on a dualpoint, etc.
*/
+static bool alps_is_valid_first_byte(const struct alps_model_info *model,
+ unsigned char data)
+{
+ return (data & model->mask0) == model->byte0;
+}
+
+static void alps_report_buttons(struct psmouse *psmouse,
+ struct input_dev *dev1, struct input_dev *dev2,
+ int left, int right, int middle)
+{
+ struct alps_data *priv = psmouse->private;
+ const struct alps_model_info *model = priv->i;
+
+ if (model->flags & ALPS_PS2_INTERLEAVED) {
+ struct input_dev *dev;
+
+ /*
+ * If shared button has already been reported on the
+ * other device (dev2) then this event should be also
+ * sent through that device.
+ */
+ dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
+ input_report_key(dev, BTN_LEFT, left);
+
+ dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
+ input_report_key(dev, BTN_RIGHT, right);
+
+ dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
+ input_report_key(dev, BTN_MIDDLE, middle);
+
+ /*
+ * Sync the _other_ device now, we'll do the first
+ * device later once we report the rest of the events.
+ */
+ input_sync(dev2);
+ } else {
+ /*
+ * For devices with non-interleaved packets we know what
+ * device buttons belong to so we can simply report them.
+ */
+ input_report_key(dev1, BTN_LEFT, left);
+ input_report_key(dev1, BTN_RIGHT, right);
+ input_report_key(dev1, BTN_MIDDLE, middle);
+ }
+}
+
static void alps_process_packet(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
@@ -93,18 +164,6 @@ static void alps_process_packet(struct psmouse *psmouse)
int x, y, z, ges, fin, left, right, middle;
int back = 0, forward = 0;
- if ((packet[0] & 0xc8) == 0x08) { /* 3-byte PS/2 packet */
- input_report_key(dev2, BTN_LEFT, packet[0] & 1);
- input_report_key(dev2, BTN_RIGHT, packet[0] & 2);
- input_report_key(dev2, BTN_MIDDLE, packet[0] & 4);
- input_report_rel(dev2, REL_X,
- packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
- input_report_rel(dev2, REL_Y,
- packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
- input_sync(dev2);
- return;
- }
-
if (model->flags & ALPS_OLDPROTO) {
left = packet[2] & 0x10;
right = packet[2] & 0x08;
@@ -140,18 +199,13 @@ static void alps_process_packet(struct psmouse *psmouse)
input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
- input_report_key(dev2, BTN_LEFT, left);
- input_report_key(dev2, BTN_RIGHT, right);
- input_report_key(dev2, BTN_MIDDLE, middle);
+ alps_report_buttons(psmouse, dev2, dev, left, right, middle);
- input_sync(dev);
input_sync(dev2);
return;
}
- input_report_key(dev, BTN_LEFT, left);
- input_report_key(dev, BTN_RIGHT, right);
- input_report_key(dev, BTN_MIDDLE, middle);
+ alps_report_buttons(psmouse, dev, dev2, left, right, middle);
/* Convert hardware tap to a reasonable Z value */
if (ges && !fin)
@@ -202,25 +256,168 @@ static void alps_process_packet(struct psmouse *psmouse)
input_sync(dev);
}
+static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
+ unsigned char packet[],
+ bool report_buttons)
+{
+ struct alps_data *priv = psmouse->private;
+ struct input_dev *dev2 = priv->dev2;
+
+ if (report_buttons)
+ alps_report_buttons(psmouse, dev2, psmouse->dev,
+ packet[0] & 1, packet[0] & 2, packet[0] & 4);
+
+ input_report_rel(dev2, REL_X,
+ packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
+ input_report_rel(dev2, REL_Y,
+ packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
+
+ input_sync(dev2);
+}
+
+static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
+{
+ struct alps_data *priv = psmouse->private;
+
+ if (psmouse->pktcnt < 6)
+ return PSMOUSE_GOOD_DATA;
+
+ if (psmouse->pktcnt == 6) {
+ /*
+ * Start a timer to flush the packet if it ends up last
+ * 6-byte packet in the stream. Timer needs to fire
+ * psmouse core times out itself. 20 ms should be enough
+ * to decide if we are getting more data or not.
+ */
+ mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
+ return PSMOUSE_GOOD_DATA;
+ }
+
+ del_timer(&priv->timer);
+
+ if (psmouse->packet[6] & 0x80) {
+
+ /*
+ * Highest bit is set - that means we either had
+ * complete ALPS packet and this is start of the
+ * next packet or we got garbage.
+ */
+
+ if (((psmouse->packet[3] |
+ psmouse->packet[4] |
+ psmouse->packet[5]) & 0x80) ||
+ (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
+ dbg("refusing packet %x %x %x %x "
+ "(suspected interleaved ps/2)\n",
+ psmouse->packet[3], psmouse->packet[4],
+ psmouse->packet[5], psmouse->packet[6]);
+ return PSMOUSE_BAD_DATA;
+ }
+
+ alps_process_packet(psmouse);
+
+ /* Continue with the next packet */
+ psmouse->packet[0] = psmouse->packet[6];
+ psmouse->pktcnt = 1;
+
+ } else {
+
+ /*
+ * High bit is 0 - that means that we indeed got a PS/2
+ * packet in the middle of ALPS packet.
+ *
+ * There is also possibility that we got 6-byte ALPS
+ * packet followed by 3-byte packet from trackpoint. We
+ * can not distinguish between these 2 scenarios but
+ * becase the latter is unlikely to happen in course of
+ * normal operation (user would need to press all
+ * buttons on the pad and start moving trackpoint
+ * without touching the pad surface) we assume former.
+ * Even if we are wrong the wost thing that would happen
+ * the cursor would jump but we should not get protocol
+ * desynchronization.
+ */
+
+ alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
+ false);
+
+ /*
+ * Continue with the standard ALPS protocol handling,
+ * but make sure we won't process it as an interleaved
+ * packet again, which may happen if all buttons are
+ * pressed. To avoid this let's reset the 4th bit which
+ * is normally 1.
+ */
+ psmouse->packet[3] = psmouse->packet[6] & 0xf7;
+ psmouse->pktcnt = 4;
+ }
+
+ return PSMOUSE_GOOD_DATA;
+}
+
+static void alps_flush_packet(unsigned long data)
+{
+ struct psmouse *psmouse = (struct psmouse *)data;
+
+ serio_pause_rx(psmouse->ps2dev.serio);
+
+ if (psmouse->pktcnt == 6) {
+
+ /*
+ * We did not any more data in reasonable amount of time.
+ * Validate the last 3 bytes and process as a standard
+ * ALPS packet.
+ */
+ if ((psmouse->packet[3] |
+ psmouse->packet[4] |
+ psmouse->packet[5]) & 0x80) {
+ dbg("refusing packet %x %x %x "
+ "(suspected interleaved ps/2)\n",
+ psmouse->packet[3], psmouse->packet[4],
+ psmouse->packet[5]);
+ } else {
+ alps_process_packet(psmouse);
+ }
+ psmouse->pktcnt = 0;
+ }
+
+ serio_continue_rx(psmouse->ps2dev.serio);
+}
+
static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
{
struct alps_data *priv = psmouse->private;
+ const struct alps_model_info *model = priv->i;
if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
if (psmouse->pktcnt == 3) {
- alps_process_packet(psmouse);
+ alps_report_bare_ps2_packet(psmouse, psmouse->packet,
+ true);
return PSMOUSE_FULL_PACKET;
}
return PSMOUSE_GOOD_DATA;
}
- if ((psmouse->packet[0] & priv->i->mask0) != priv->i->byte0)
+ /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
+
+ if ((model->flags & ALPS_PS2_INTERLEAVED) &&
+ psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
+ return alps_handle_interleaved_ps2(psmouse);
+ }
+
+ if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
+ dbg("refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
+ psmouse->packet[0], model->mask0, model->byte0);
return PSMOUSE_BAD_DATA;
+ }
/* Bytes 2 - 6 should have 0 in the highest bit */
if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= 6 &&
- (psmouse->packet[psmouse->pktcnt - 1] & 0x80))
+ (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
+ dbg("refusing packet[%i] = %x\n",
+ psmouse->pktcnt - 1, psmouse->packet[psmouse->pktcnt - 1]);
return PSMOUSE_BAD_DATA;
+ }
if (psmouse->pktcnt == 6) {
alps_process_packet(psmouse);
@@ -459,6 +656,7 @@ static void alps_disconnect(struct psmouse *psmouse)
struct alps_data *priv = psmouse->private;
psmouse_reset(psmouse);
+ del_timer_sync(&priv->timer);
input_unregister_device(priv->dev2);
kfree(priv);
}
@@ -476,6 +674,8 @@ int alps_init(struct psmouse *psmouse)
goto init_fail;
priv->dev2 = dev2;
+ setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
+
psmouse->private = priv;
model = alps_get_model(psmouse, &version);
diff --git a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
index bc87936fee1..904ed8b3c8b 100644
--- a/drivers/input/mouse/alps.h
+++ b/drivers/input/mouse/alps.h
@@ -23,6 +23,7 @@ struct alps_data {
char phys[32]; /* Phys */
const struct alps_model_info *i;/* Info */
int prev_fin; /* Finger bit from previous packet */
+ struct timer_list timer;
};
#ifdef CONFIG_MOUSE_PS2_ALPS
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 23:04:10 +0000