Dell E2 series laptops ( M4500, E6510, E6410 etc.) have ALPS touchpads
which are enabled by default as 3-byte generic PS/2 mouse mode. This
patch enables the 4-byte "Intellimouse Mode" ( e.g scrolling support).
Signed-off-by: Rezwanul Kabir <Rezwanul_Kabir@xxxxxxxx>
---
diff -urNp a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
--- a/drivers/input/mouse/alps.c 2010-08-06 12:43:11.000000000 -0500
+++ b/drivers/input/mouse/alps.c 2010-08-10 21:53:46.000000000 -0500
@@ -63,6 +63,8 @@ static const struct alps_model_info alps
/* Dell Latitude E5500, E6400, E6500, Precision M4400 */
{ { 0x62, 0x02, 0x14 }, 0xcf, 0xcf,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
+ /* Dell Precision 4500 */
+ { { 0x73, 0x02, 0x64 }, 0x80, 0x80, 0 },
{ { 0x73, 0x02, 0x50 }, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
{ { 0x52, 0x01, 0x14 }, 0xff, 0xff,
ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
@@ -111,6 +113,77 @@ static const struct alps_model_info alps
* on a dualpoint, etc.
*/
+
+/* Magic Sequence to enable Intellimouse Mode on Dell E2 Touchpads*/
+
+static int dell_e2_setup_intellimouse_mode(void *data)
+{
+ struct psmouse *psmouse = (struct psmouse *)(data);
+ struct ps2dev *ps2dev = &psmouse->ps2dev;
+ struct input_dev *dev = psmouse->dev;
+ unsigned char param[] = {0, 0, 0};
+
+ if (ps2_command(ps2dev, param, 0x00f5) ||
+ ps2_command(ps2dev, param, 0x00ea) ||
+ ps2_command(ps2dev, param, 0x00ec) ||
+ ps2_command(ps2dev, param, 0x00ec) ||
+ ps2_command(ps2dev, param, 0x00ec) ||
+ ps2_command(ps2dev, param, 0x03e9))
+ return -1;
+
+ dbg("alps:dell_e2_setup: param[0]: %x,"
+ "param[1]: %x, param[2]: %x\n", param[0],
+ param[1], param[2]);
+/* Check for supported model to continue */
+
+ if (!((param[0] == 0x88) && (param[1] == 0x07)
+ && ((param[2] == 0x9D) || (param[2] == 0x9B))))
+ return -1;
+
+ if (ps2_command(ps2dev, NULL, 0x00ec) ||
+ ps2_command(ps2dev, NULL, 0x00f0) ||
+ ps2_command(ps2dev, NULL, 0x00f0) ||
+ ps2_command(ps2dev, NULL, 0x00f0) ||
+ ps2_command(ps2dev, NULL, 0x00f3) ||
+ ps2_command(ps2dev, NULL, 0x0028) ||
+ ps2_command(ps2dev, NULL, 0x00f0) ||
+ ps2_command(ps2dev, NULL, 0x00f6) ||
+ ps2_command(ps2dev, NULL, 0x00ea) ||
+ ps2_command(ps2dev, NULL, 0x00f4))
+ return -1;
+
+ __set_bit(BTN_MIDDLE, dev->keybit);
+ __set_bit(REL_WHEEL, dev->relbit);
+
+ psmouse->pktsize = 4;
+ psmouse->type = PSMOUSE_IMPS;
+
+ return 0;
+}
+
+static const struct alps_model_quirk alps_model_init_quirk_tbl[] = {
+
+ { {0x73, 0x02, 0x64}, dell_e2_setup_intellimouse_mode }
+};
+
+static int alps_model_init_quirk(struct psmouse *psmouse,
+ const struct alps_model_info *model)
+{
+ int rc = 1;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(alps_model_init_quirk_tbl); i++) {
+ if (!memcmp(model->signature,
+ alps_model_init_quirk_tbl[i].signature,
+ sizeof(alps_model_init_quirk_tbl[i].signature))) {
+ rc = alps_model_init_quirk_tbl[i].callback(psmouse);
+ break;
+ }
+ }
+
+ return rc;
+}
+
static bool alps_is_valid_first_byte(const struct alps_model_info *model,
unsigned char data)
{
@@ -677,6 +750,14 @@ int alps_init(struct psmouse *psmouse)
if (alps_hw_init(psmouse))
goto init_fail;
+ if (!alps_model_init_quirk(psmouse, model)) {
+ printk(KERN_WARNING "alps.c: Enabled hardware quirk, falling back to psmouse-core\n");
+ input_free_device(dev2);
+ kfree(priv);
+ psmouse->private = NULL;
+ return 0;
+ }
+
/*
* Undo part of setup done for us by psmouse core since touchpad
* is not a relative device.
diff -urNp a/drivers/input/mouse/alps.h b/drivers/input/mouse/alps.h
--- a/drivers/input/mouse/alps.h 2010-08-06 12:43:06.000000000 -0500
+++ b/drivers/input/mouse/alps.h 2010-08-06 12:43:46.000000000 -0500
@@ -26,6 +26,11 @@ struct alps_data {
struct timer_list timer;
};
+struct alps_model_quirk {
+unsigned char signature[3];
+int (*callback)(void *data);
+};
+
#ifdef CONFIG_MOUSE_PS2_ALPS
int alps_detect(struct psmouse *psmouse, bool set_properties);
int alps_init(struct psmouse *psmouse);
diff -urNp a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
--- a/drivers/input/mouse/psmouse-base.c 2010-08-06 12:42:57.000000000 -0500
+++ b/drivers/input/mouse/psmouse-base.c 2010-08-10 10:00:06.000000000 -0500
@@ -659,7 +659,8 @@ static int psmouse_extensions(struct psm
ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
if (alps_detect(psmouse, set_properties) == 0) {
if (!set_properties || alps_init(psmouse) == 0)
- return PSMOUSE_ALPS;
+ /* If ALPS model quirk was applied, don't change the settings */
+ return psmouse->type ? psmouse->type : PSMOUSE_ALPS;
/*
* Init failed, try basic relative protocols
*/
--
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