Input: sentelic - refactor code for upcoming new hardware support

- Move event bits setup code into a separate function,
  fsp_set_input_params(), so that we can perform hardware-specific settings
  in the future;
- Take hardware version information into account when activating
  protocol;
- Remove button information from boot message as it's somewhat confusing
  and is only for internal processing. While there, also move button
  retrieval code to be a part of protocol activation process.

Signed-off-by: Tai-hwa Liang <avatar@sentelic.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

2 files changed, 94 insertions, 62 deletions

diff --git a/drivers/input/mouse/sentelic.c b/drivers/input/mouse/sentelic.c
index 2a77a52..62fa698 100644
--- a/drivers/input/mouse/sentelic.c
+++ b/drivers/input/mouse/sentelic.c
@@ -128,8 +128,9 @@ static int fsp_reg_read(struct psmouse *psmouse, int reg_addr, int *reg_val)
  out:
 	ps2_end_command(ps2dev);
 	psmouse_activate(psmouse);
-	dev_dbg(&ps2dev->serio->dev, "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
-		reg_addr, *reg_val, rc);
+	psmouse_dbg(psmouse,
+		    "READ REG: 0x%02x is 0x%02x (rc = %d)\n",
+		    reg_addr, *reg_val, rc);
 	return rc;
 }
 
@@ -179,8 +180,9 @@ static int fsp_reg_write(struct psmouse *psmouse, int reg_addr, int reg_val)
 
  out:
 	ps2_end_command(ps2dev);
-	dev_dbg(&ps2dev->serio->dev, "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
-		reg_addr, reg_val, rc);
+	psmouse_dbg(psmouse,
+		    "WRITE REG: 0x%02x to 0x%02x (rc = %d)\n",
+		    reg_addr, reg_val, rc);
 	return rc;
 }
 
@@ -237,8 +239,9 @@ static int fsp_page_reg_read(struct psmouse *psmouse, int *reg_val)
  out:
 	ps2_end_command(ps2dev);
 	psmouse_activate(psmouse);
-	dev_dbg(&ps2dev->serio->dev, "READ PAGE REG: 0x%02x (rc = %d)\n",
-		*reg_val, rc);
+	psmouse_dbg(psmouse,
+		    "READ PAGE REG: 0x%02x (rc = %d)\n",
+		    *reg_val, rc);
 	return rc;
 }
 
@@ -274,8 +277,9 @@ static int fsp_page_reg_write(struct psmouse *psmouse, int reg_val)
 
  out:
 	ps2_end_command(ps2dev);
-	dev_dbg(&ps2dev->serio->dev, "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
-		reg_val, rc);
+	psmouse_dbg(psmouse,
+		    "WRITE PAGE REG: to 0x%02x (rc = %d)\n",
+		    reg_val, rc);
 	return rc;
 }
 
@@ -319,7 +323,7 @@ static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
 	int res = 0;
 
 	if (fsp_reg_read(psmouse, FSP_REG_OPC_QDOWN, &v) == -1) {
-		dev_err(&psmouse->ps2dev.serio->dev, "Unable get OPC state.\n");
+		psmouse_err(psmouse, "Unable get OPC state.\n");
 		return -EIO;
 	}
 
@@ -336,8 +340,7 @@ static int fsp_opc_tag_enable(struct psmouse *psmouse, bool enable)
 	}
 
 	if (res != 0) {
-		dev_err(&psmouse->ps2dev.serio->dev,
-			"Unable to enable OPC tag.\n");
+		psmouse_err(psmouse, "Unable to enable OPC tag.\n");
 		res = -EIO;
 	}
 
@@ -657,8 +660,8 @@ static psmouse_ret_t fsp_process_byte(struct psmouse *psmouse)
 
 	switch (psmouse->packet[0] >> FSP_PKT_TYPE_SHIFT) {
 	case FSP_PKT_TYPE_ABS:
-		dev_warn(&psmouse->ps2dev.serio->dev,
-			 "Unexpected absolute mode packet, ignored.\n");
+		psmouse_warn(psmouse,
+			     "Unexpected absolute mode packet, ignored.\n");
 		break;
 
 	case FSP_PKT_TYPE_NORMAL_OPC:
@@ -736,42 +739,69 @@ static int fsp_activate_protocol(struct psmouse *psmouse)
 
 	ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
 	if (param[0] != 0x04) {
-		dev_err(&psmouse->ps2dev.serio->dev,
-			"Unable to enable 4 bytes packet format.\n");
+		psmouse_err(psmouse,
+			    "Unable to enable 4 bytes packet format.\n");
 		return -EIO;
 	}
 
-	if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
-		dev_err(&psmouse->ps2dev.serio->dev,
-			"Unable to read SYSCTL5 register.\n");
-		return -EIO;
-	}
+	if (pad->ver < FSP_VER_STL3888_C0) {
+		/* Preparing relative coordinates output for older hardware */
+		if (fsp_reg_read(psmouse, FSP_REG_SYSCTL5, &val)) {
+			psmouse_err(psmouse,
+				    "Unable to read SYSCTL5 register.\n");
+			return -EIO;
+		}
 
-	val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
-	/* Ensure we are not in absolute mode */
-	val &= ~FSP_BIT_EN_PKT_G0;
-	if (pad->buttons == 0x06) {
-		/* Left/Middle/Right & Scroll Up/Down/Right/Left */
-		val |= FSP_BIT_EN_MSID6;
-	}
+		if (fsp_get_buttons(psmouse, &pad->buttons)) {
+			psmouse_err(psmouse,
+				    "Unable to retrieve number of buttons.\n");
+			return -EIO;
+		}
 
-	if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
-		dev_err(&psmouse->ps2dev.serio->dev,
-			"Unable to set up required mode bits.\n");
-		return -EIO;
+		val &= ~(FSP_BIT_EN_MSID7 | FSP_BIT_EN_MSID8 | FSP_BIT_EN_AUTO_MSID8);
+		/* Ensure we are not in absolute mode */
+		val &= ~FSP_BIT_EN_PKT_G0;
+		if (pad->buttons == 0x06) {
+			/* Left/Middle/Right & Scroll Up/Down/Right/Left */
+			val |= FSP_BIT_EN_MSID6;
+		}
+
+		if (fsp_reg_write(psmouse, FSP_REG_SYSCTL5, val)) {
+			psmouse_err(psmouse,
+				    "Unable to set up required mode bits.\n");
+			return -EIO;
+		}
+
+		/*
+		 * Enable OPC tags such that driver can tell the difference
+		 * between on-pad and real button click
+		 */
+		if (fsp_opc_tag_enable(psmouse, true))
+			psmouse_warn(psmouse,
+				     "Failed to enable OPC tag mode.\n");
+		/* enable on-pad click by default */
+		pad->flags |= FSPDRV_FLAG_EN_OPC;
+
+		/* Enable on-pad vertical and horizontal scrolling */
+		fsp_onpad_vscr(psmouse, true);
+		fsp_onpad_hscr(psmouse, true);
 	}
 
-	/*
-	 * Enable OPC tags such that driver can tell the difference between
-	 * on-pad and real button click
-	 */
-	if (fsp_opc_tag_enable(psmouse, true))
-		dev_warn(&psmouse->ps2dev.serio->dev,
-			 "Failed to enable OPC tag mode.\n");
+	return 0;
+}
+
+static int fsp_set_input_params(struct psmouse *psmouse)
+{
+	struct input_dev *dev = psmouse->dev;
+	struct fsp_data *pad = psmouse->private;
 
-	/* Enable on-pad vertical and horizontal scrolling */
-	fsp_onpad_vscr(psmouse, true);
-	fsp_onpad_hscr(psmouse, true);
+	if (pad->ver < FSP_VER_STL3888_C0) {
+		__set_bit(BTN_MIDDLE, dev->keybit);
+		__set_bit(BTN_BACK, dev->keybit);
+		__set_bit(BTN_FORWARD, dev->keybit);
+		__set_bit(REL_WHEEL, dev->relbit);
+		__set_bit(REL_HWHEEL, dev->relbit);
+	}
 
 	return 0;
 }
@@ -829,18 +859,16 @@ static int fsp_reconnect(struct psmouse *psmouse)
 int fsp_init(struct psmouse *psmouse)
 {
 	struct fsp_data *priv;
-	int ver, rev, buttons;
+	int ver, rev;
 	int error;
 
 	if (fsp_get_version(psmouse, &ver) ||
-	    fsp_get_revision(psmouse, &rev) ||
-	    fsp_get_buttons(psmouse, &buttons)) {
+	    fsp_get_revision(psmouse, &rev)) {
 		return -ENODEV;
 	}
 
-	psmouse_info(psmouse,
-		     "Finger Sensing Pad, hw: %d.%d.%d, sw: %s, buttons: %d\n",
-		     ver >> 4, ver & 0x0F, rev, fsp_drv_ver, buttons & 7);
+	psmouse_info(psmouse, "Finger Sensing Pad, hw: %d.%d.%d, sw: %s\n",
+		     ver >> 4, ver & 0x0F, rev, fsp_drv_ver);
 
 	psmouse->private = priv = kzalloc(sizeof(struct fsp_data), GFP_KERNEL);
 	if (!priv)
@@ -848,17 +876,6 @@ int fsp_init(struct psmouse *psmouse)
 
 	priv->ver = ver;
 	priv->rev = rev;
-	priv->buttons = buttons;
-
-	/* enable on-pad click by default */
-	priv->flags |= FSPDRV_FLAG_EN_OPC;
-
-	/* Set up various supported input event bits */
-	__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
-	__set_bit(BTN_BACK, psmouse->dev->keybit);
-	__set_bit(BTN_FORWARD, psmouse->dev->keybit);
-	__set_bit(REL_WHEEL, psmouse->dev->relbit);
-	__set_bit(REL_HWHEEL, psmouse->dev->relbit);
 
 	psmouse->protocol_handler = fsp_process_byte;
 	psmouse->disconnect = fsp_disconnect;
@@ -866,16 +883,20 @@ int fsp_init(struct psmouse *psmouse)
 	psmouse->cleanup = fsp_reset;
 	psmouse->pktsize = 4;
 
-	/* set default packet output based on number of buttons we found */
 	error = fsp_activate_protocol(psmouse);
 	if (error)
 		goto err_out;
 
+	/* Set up various supported input event bits */
+	error = fsp_set_input_params(psmouse);
+	if (error)
+		goto err_out;
+
 	error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj,
 				   &fsp_attribute_group);
 	if (error) {
-		dev_err(&psmouse->ps2dev.serio->dev,
-			"Failed to create sysfs attributes (%d)", error);
+		psmouse_err(psmouse,
+			    "Failed to create sysfs attributes (%d)", error);
 		goto err_out;
 	}
 
diff --git a/drivers/input/mouse/sentelic.h b/drivers/input/mouse/sentelic.h
index 2e4af24..23bd25e 100644
--- a/drivers/input/mouse/sentelic.h
+++ b/drivers/input/mouse/sentelic.h
@@ -64,12 +64,23 @@
 #define	FSP_PKT_TYPE_NORMAL_OPC	(0x03)
 #define	FSP_PKT_TYPE_SHIFT	(6)
 
+/* hardware revisions */
+#define	FSP_VER_STL3888_A4	(0xC1)
+#define	FSP_VER_STL3888_B0	(0xD0)
+#define	FSP_VER_STL3888_B1	(0xD1)
+#define	FSP_VER_STL3888_B2	(0xD2)
+#define	FSP_VER_STL3888_C0	(0xE0)
+#define	FSP_VER_STL3888_C1	(0xE1)
+#define	FSP_VER_STL3888_D0	(0xE2)
+#define	FSP_VER_STL3888_D1	(0xE3)
+#define	FSP_VER_STL3888_E0	(0xE4)
+
 #ifdef __KERNEL__
 
 struct fsp_data {
 	unsigned char	ver;		/* hardware version */
 	unsigned char	rev;		/* hardware revison */
-	unsigned char	buttons;	/* Number of buttons */
+	unsigned int	buttons;	/* Number of buttons */
 	unsigned int	flags;
 #define	FSPDRV_FLAG_EN_OPC	(0x001)	/* enable on-pad clicking */