Input: cyapa - add gen6 device module support

Based on the cyapa core, add support for basic functionality of the gen6
trackpad devices. The driver can automatically determine what protocol
(gen3, gen5, or gen6) should be used with the attached trackpad device.

Signed-off-by: Dudley Du <dudl@cypress.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 66 insertions, 3 deletions

diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c
index 9d75c6f9f307..4e19dce1dd62 100644
--- a/drivers/input/mouse/cyapa_gen5.c
+++ b/drivers/input/mouse/cyapa_gen5.c
@@ -133,7 +133,9 @@ struct cyapa_pip_touch_record {
 	 * Bit 7 - 3: reserved
 	 * Bit 2 - 0: touch type;
 	 *            0 : standard finger;
-	 *            1 - 15 : reserved.
+	 *            1 : proximity (Start supported in Gen5 TP).
+	 *            2 : finger hover (defined, but not used yet.)
+	 *            3 - 15 : reserved.
 	 */
 	u8 touch_type;
 
@@ -167,6 +169,9 @@ struct cyapa_pip_touch_record {
 	 * The meaning of this value is different when touch_type is different.
 	 * For standard finger type:
 	 *	Touch intensity in counts, pressure value.
+	 * For proximity type (Start supported in Gen5 TP):
+	 *	The distance, in surface units, between the contact and
+	 *	the surface.
 	 **/
 	u8 z;
 
@@ -218,6 +223,12 @@ struct cyapa_tsg_bin_image_head {
 	u8 fw_major_version;
 	u8 fw_minor_version;
 	u8 fw_revision_control_number[8];
+	u8 silicon_id_hi;
+	u8 silicon_id_lo;
+	u8 chip_revision;
+	u8 family_id;
+	u8 bl_ver_maj;
+	u8 bl_ver_min;
 } __packed;
 
 struct cyapa_tsg_bin_image_data_record {
@@ -1134,6 +1145,39 @@ int cyapa_pip_bl_enter(struct cyapa *cyapa)
 	cyapa->operational = false;
 	if (cyapa->gen == CYAPA_GEN5)
 		cyapa->state = CYAPA_STATE_GEN5_BL;
+	else if (cyapa->gen == CYAPA_GEN6)
+		cyapa->state = CYAPA_STATE_GEN6_BL;
+	return 0;
+}
+
+static int cyapa_pip_fw_head_check(struct cyapa *cyapa,
+		struct cyapa_tsg_bin_image_head *image_head)
+{
+	if (image_head->head_size != 0x0C && image_head->head_size != 0x12)
+		return -EINVAL;
+
+	switch (cyapa->gen) {
+	case CYAPA_GEN6:
+		if (image_head->family_id != 0x9B ||
+		    image_head->silicon_id_hi != 0x0B)
+			return -EINVAL;
+		break;
+	case CYAPA_GEN5:
+		/* Gen5 without proximity support. */
+		if (cyapa->platform_ver < 2) {
+			if (image_head->head_size == 0x0C)
+				break;
+			return -EINVAL;
+		}
+
+		if (image_head->family_id != 0x91 ||
+		    image_head->silicon_id_hi != 0x02)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -1150,6 +1194,14 @@ int cyapa_pip_check_fw(struct cyapa *cyapa, const struct firmware *fw)
 	u16 app_integrity_crc;
 	int i;
 
+	/* Verify the firmware image not miss-used for Gen5 and Gen6. */
+	if (cyapa_pip_fw_head_check(cyapa,
+		(struct cyapa_tsg_bin_image_head *)fw->data)) {
+		dev_err(dev, "%s: firmware image not match TP device.\n",
+			     __func__);
+		return -EINVAL;
+	}
+
 	image_records =
 		cyapa_get_image_record_data_num(fw, &flash_records_count);
 
@@ -2339,6 +2391,9 @@ static int cyapa_gen5_bl_query_data(struct cyapa *cyapa)
 	cyapa->fw_maj_ver = resp_data[22];
 	cyapa->fw_min_ver = resp_data[23];
 
+	cyapa->platform_ver = (resp_data[26] >> PIP_BL_PLATFORM_VER_SHIFT) &
+			      PIP_BL_PLATFORM_VER_MASK;
+
 	return 0;
 }
 
@@ -2362,8 +2417,16 @@ static int cyapa_gen5_get_query_data(struct cyapa *cyapa)
 		PIP_PRODUCT_FAMILY_TRACKPAD)
 		return -EINVAL;
 
-	cyapa->fw_maj_ver = resp_data[15];
-	cyapa->fw_min_ver = resp_data[16];
+	cyapa->platform_ver = (resp_data[49] >> PIP_BL_PLATFORM_VER_SHIFT) &
+			      PIP_BL_PLATFORM_VER_MASK;
+	if (cyapa->gen == CYAPA_GEN5 && cyapa->platform_ver < 2) {
+		/* Gen5 firmware that does not support proximity. */
+		cyapa->fw_maj_ver = resp_data[15];
+		cyapa->fw_min_ver = resp_data[16];
+	} else {
+		cyapa->fw_maj_ver = resp_data[9];
+		cyapa->fw_min_ver = resp_data[10];
+	}
 
 	cyapa->electrodes_x = resp_data[52];
 	cyapa->electrodes_y = resp_data[53];