Input: wacom - use per-device instance of wacom_features

Since we mangle data in wacom_features when dealing with certain devices let's
use a private (per-device) instance of wacom_features in wacom_wac. This way
same product ID can support more than one type of device, such as pen and touch,
and not interfere with each other.

Signed-off-by: Jason Childs <oblivian@users.sourceforge.net>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

3 files changed, 78 insertions, 56 deletions

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index be4b76f264a7..f22b88d03c6c 100644
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -211,7 +211,8 @@ void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
 		BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 		BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_STYLUS2);
-	input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_DISTANCE,
+			     0, wacom_wac->features.distance_max, 0, 0);
 }
 
 void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
@@ -261,7 +262,8 @@ void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 		BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_TOOL_BRUSH) |
 		BIT_MASK(BTN_TOOL_PENCIL) | BIT_MASK(BTN_TOOL_AIRBRUSH) |
 		BIT_MASK(BTN_TOOL_LENS) | BIT_MASK(BTN_STYLUS2);
-	input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
+	input_set_abs_params(input_dev, ABS_DISTANCE,
+			     0, wacom_wac->features.distance_max, 0, 0);
 	input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
 	input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
 	input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
@@ -282,17 +284,19 @@ void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 
 void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	if (wacom_wac->features->device_type == BTN_TOOL_DOUBLETAP ||
-	    wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
-		input_set_abs_params(input_dev, ABS_RX, 0, wacom_wac->features->x_phy, 0, 0);
-		input_set_abs_params(input_dev, ABS_RY, 0, wacom_wac->features->y_phy, 0, 0);
-		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
+	struct wacom_features *features = &wacom_wac->features;
+
+	if (features->device_type == BTN_TOOL_DOUBLETAP ||
+	    features->device_type == BTN_TOOL_TRIPLETAP) {
+		input_set_abs_params(input_dev, ABS_RX, 0, features->x_phy, 0, 0);
+		input_set_abs_params(input_dev, ABS_RY, 0, features->y_phy, 0, 0);
+		__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
 	}
 }
 
 void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	if (wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
+	if (wacom_wac->features.device_type == BTN_TOOL_TRIPLETAP) {
 		input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_TRIPLETAP);
 		input_dev->evbit[0] |= BIT_MASK(EV_MSC);
 		input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
@@ -530,26 +534,40 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	struct usb_endpoint_descriptor *endpoint;
 	struct wacom *wacom;
 	struct wacom_wac *wacom_wac;
-	struct wacom_features *features = (void *)id->driver_info;
+	struct wacom_features *features;
 	struct input_dev *input_dev;
-	int error = -ENOMEM;
+	int error;
 
-	if (!features)
+	if (!id->driver_info)
 		return -EINVAL;
 
 	wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 	wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
 	input_dev = input_allocate_device();
-	if (!wacom || !input_dev || !wacom_wac)
+	if (!wacom || !input_dev || !wacom_wac) {
+		error = -ENOMEM;
+		goto fail1;
+	}
+
+	wacom_wac->features = *((struct wacom_features *)id->driver_info);
+	features = &wacom_wac->features;
+	if (features->pktlen > WACOM_PKGLEN_MAX) {
+		error = -EINVAL;
 		goto fail1;
+	}
 
-	wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX, GFP_KERNEL, &wacom->data_dma);
-	if (!wacom_wac->data)
+	wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX,
+					   GFP_KERNEL, &wacom->data_dma);
+	if (!wacom_wac->data) {
+		error = -ENOMEM;
 		goto fail1;
+	}
 
 	wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
-	if (!wacom->irq)
+	if (!wacom->irq) {
+		error = -ENOMEM;
 		goto fail2;
+	}
 
 	wacom->usbdev = dev;
 	wacom->dev = input_dev;
@@ -558,11 +576,6 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 	strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 
-	wacom_wac->features = features;
-	BUG_ON(features->pktlen > WACOM_PKGLEN_MAX);
-
-	input_dev->name = wacom_wac->features->name;
-	wacom->wacom_wac = wacom_wac;
 	usb_to_input_id(dev, &input_dev->id);
 
 	input_dev->dev.parent = &intf->dev;
@@ -579,6 +592,9 @@ static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *i
 	if (error)
 		goto fail2;
 
+	input_dev->name = features->name;
+	wacom->wacom_wac = wacom_wac;
+
 	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 	input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOUCH);
 
@@ -643,7 +659,7 @@ static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 static int wacom_resume(struct usb_interface *intf)
 {
 	struct wacom *wacom = usb_get_intfdata(intf);
-	struct wacom_features *features = wacom->wacom_wac->features;
+	struct wacom_features *features = &wacom->wacom_wac->features;
 	int rv;
 
 	mutex_lock(&wacom->lock);
diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 56aaf0164a56..e4a1a7dcd9a4 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -55,6 +55,7 @@ static int wacom_penpartner_irq(struct wacom_wac *wacom, void *wcombo)
 
 static int wacom_pl_irq(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	unsigned char *data = wacom->data;
 	int prox, pressure;
 
@@ -68,9 +69,9 @@ static int wacom_pl_irq(struct wacom_wac *wacom, void *wcombo)
 	if (prox) {
 		wacom->id[0] = ERASER_DEVICE_ID;
 		pressure = (signed char)((data[7] << 1) | ((data[4] >> 2) & 1));
-		if (wacom->features->pressure_max > 255)
+		if (features->pressure_max > 255)
 			pressure = (pressure << 1) | ((data[4] >> 6) & 1);
-		pressure += (wacom->features->pressure_max + 1) / 2;
+		pressure += (features->pressure_max + 1) / 2;
 
 		/*
 		 * if going from out of proximity into proximity select between the eraser
@@ -152,6 +153,7 @@ static int wacom_ptu_irq(struct wacom_wac *wacom, void *wcombo)
 
 static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	unsigned char *data = wacom->data;
 	int x, y, rw;
 	static int penData = 0;
@@ -179,8 +181,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 
 			case 2: /* Mouse with wheel */
 				wacom_report_key(wcombo, BTN_MIDDLE, data[1] & 0x04);
-				if (wacom->features->type == WACOM_G4 ||
-						wacom->features->type == WACOM_MO) {
+				if (features->type == WACOM_G4 || features->type == WACOM_MO) {
 					rw = data[7] & 0x04 ? (data[7] & 0x03)-4 : (data[7] & 0x03);
 					wacom_report_rel(wcombo, REL_WHEEL, -rw);
 				} else
@@ -192,8 +193,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 				wacom->id[0] = CURSOR_DEVICE_ID;
 				wacom_report_key(wcombo, BTN_LEFT, data[1] & 0x01);
 				wacom_report_key(wcombo, BTN_RIGHT, data[1] & 0x02);
-				if (wacom->features->type == WACOM_G4 ||
-						wacom->features->type == WACOM_MO)
+				if (features->type == WACOM_G4 || features->type == WACOM_MO)
 					wacom_report_abs(wcombo, ABS_DISTANCE, data[6] & 0x3f);
 				else
 					wacom_report_abs(wcombo, ABS_DISTANCE, data[7] & 0x3f);
@@ -230,7 +230,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 	}
 
 	/* send pad data */
-	switch (wacom->features->type) {
+	switch (features->type) {
 	    case WACOM_G4:
 		if (data[7] & 0xf8) {
 			if (penData) {
@@ -300,11 +300,12 @@ static int wacom_graphire_irq(struct wacom_wac *wacom, void *wcombo)
 
 static int wacom_intuos_inout(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	unsigned char *data = wacom->data;
 	int idx = 0;
 
 	/* tool number */
-	if (wacom->features->type == INTUOS)
+	if (features->type == INTUOS)
 		idx = data[1] & 0x01;
 
 	/* Enter report */
@@ -402,7 +403,7 @@ static int wacom_intuos_inout(struct wacom_wac *wacom, void *wcombo)
 			wacom_report_key(wcombo, BTN_STYLUS2, 0);
 			wacom_report_key(wcombo, BTN_TOUCH, 0);
 			wacom_report_abs(wcombo, ABS_WHEEL, 0);
-			if (wacom->features->type >= INTUOS3S)
+			if (features->type >= INTUOS3S)
 				wacom_report_abs(wcombo, ABS_Z, 0);
 		}
 		wacom_report_key(wcombo, wacom->tool[idx], 0);
@@ -416,13 +417,14 @@ static int wacom_intuos_inout(struct wacom_wac *wacom, void *wcombo)
 
 static void wacom_intuos_general(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	unsigned char *data = wacom->data;
 	unsigned int t;
 
 	/* general pen packet */
 	if ((data[1] & 0xb8) == 0xa0) {
 		t = (data[6] << 2) | ((data[7] >> 6) & 3);
-		if (wacom->features->type >= INTUOS4S && wacom->features->type <= INTUOS4L)
+		if (features->type >= INTUOS4S && features->type <= INTUOS4L)
 			t = (t << 1) | (data[1] & 1);
 		wacom_report_abs(wcombo, ABS_PRESSURE, t);
 		wacom_report_abs(wcombo, ABS_TILT_X,
@@ -446,6 +448,7 @@ static void wacom_intuos_general(struct wacom_wac *wacom, void *wcombo)
 
 static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	unsigned char *data = wacom->data;
 	unsigned int t;
 	int idx = 0, result;
@@ -457,7 +460,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 	}
 
 	/* tool number */
-	if (wacom->features->type == INTUOS)
+	if (features->type == INTUOS)
 		idx = data[1] & 0x01;
 
 	/* pad packets. Works as a second tool and is always in prox */
@@ -466,7 +469,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 		if (wacom->tool[1] != BTN_TOOL_FINGER)
 			wacom->tool[1] = BTN_TOOL_FINGER;
 
-		if (wacom->features->type >= INTUOS4S && wacom->features->type <= INTUOS4L) {
+		if (features->type >= INTUOS4S && features->type <= INTUOS4L) {
 			wacom_report_key(wcombo, BTN_0, (data[2] & 0x01));
 			wacom_report_key(wcombo, BTN_1, (data[3] & 0x01));
 			wacom_report_key(wcombo, BTN_2, (data[3] & 0x02));
@@ -480,7 +483,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 				/* Out of proximity, clear wheel value. */
 				wacom_report_abs(wcombo, ABS_WHEEL, 0);
 			}
-			if (wacom->features->type != INTUOS4S) {
+			if (features->type != INTUOS4S) {
 				wacom_report_key(wcombo, BTN_7, (data[3] & 0x40));
 				wacom_report_key(wcombo, BTN_8, (data[3] & 0x80));
 			}
@@ -528,18 +531,20 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 		return 0;
 
 	/* Only large Intuos support Lense Cursor */
-	if ((wacom->tool[idx] == BTN_TOOL_LENS)
-			&& ((wacom->features->type == INTUOS3)
-			|| (wacom->features->type == INTUOS3S)
-			|| (wacom->features->type == INTUOS4)
-			|| (wacom->features->type == INTUOS4S)))
+	if (wacom->tool[idx] == BTN_TOOL_LENS &&
+	    (features->type == INTUOS3 ||
+	     features->type == INTUOS3S ||
+	     features->type == INTUOS4 ||
+	     features->type == INTUOS4S)) {
+
 		return 0;
+	}
 
 	/* Cintiq doesn't send data when RDY bit isn't set */
-	if ((wacom->features->type == CINTIQ) && !(data[1] & 0x40))
+	if (features->type == CINTIQ && !(data[1] & 0x40))
                  return 0;
 
-	if (wacom->features->type >= INTUOS3S) {
+	if (features->type >= INTUOS3S) {
 		wacom_report_abs(wcombo, ABS_X, (data[2] << 9) | (data[3] << 1) | ((data[9] >> 1) & 1));
 		wacom_report_abs(wcombo, ABS_Y, (data[4] << 9) | (data[5] << 1) | (data[9] & 1));
 		wacom_report_abs(wcombo, ABS_DISTANCE, ((data[9] >> 2) & 0x3f));
@@ -557,7 +562,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 
 		if (data[1] & 0x02) {
 			/* Rotation packet */
-			if (wacom->features->type >= INTUOS3S) {
+			if (features->type >= INTUOS3S) {
 				/* I3 marker pen rotation */
 				t = (data[6] << 3) | ((data[7] >> 5) & 7);
 				t = (data[7] & 0x20) ? ((t > 900) ? ((t-1) / 2 - 1350) :
@@ -570,7 +575,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 					((t - 1) / 2) : -t / 2);
 			}
 
-		} else if (!(data[1] & 0x10) && wacom->features->type < INTUOS3S) {
+		} else if (!(data[1] & 0x10) && features->type < INTUOS3S) {
 			/* 4D mouse packet */
 			wacom_report_key(wcombo, BTN_LEFT,   data[8] & 0x01);
 			wacom_report_key(wcombo, BTN_MIDDLE, data[8] & 0x02);
@@ -583,7 +588,7 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 
 		} else if (wacom->tool[idx] == BTN_TOOL_MOUSE) {
 			/* I4 mouse */
-			if (wacom->features->type >= INTUOS4S && wacom->features->type <= INTUOS4L) {
+			if (features->type >= INTUOS4S && features->type <= INTUOS4L) {
 				wacom_report_key(wcombo, BTN_LEFT,   data[6] & 0x01);
 				wacom_report_key(wcombo, BTN_MIDDLE, data[6] & 0x02);
 				wacom_report_key(wcombo, BTN_RIGHT,  data[6] & 0x04);
@@ -604,13 +609,13 @@ static int wacom_intuos_irq(struct wacom_wac *wacom, void *wcombo)
 						 - ((data[8] & 0x02) >> 1));
 
 				/* I3 2D mouse side buttons */
-				if (wacom->features->type >= INTUOS3S && wacom->features->type <= INTUOS3L) {
+				if (features->type >= INTUOS3S && features->type <= INTUOS3L) {
 					wacom_report_key(wcombo, BTN_SIDE,   data[8] & 0x40);
 					wacom_report_key(wcombo, BTN_EXTRA,  data[8] & 0x20);
 				}
 			}
-		} else if ((wacom->features->type < INTUOS3S || wacom->features->type == INTUOS3L ||
-				wacom->features->type == INTUOS4L) &&
+		} else if ((features->type < INTUOS3S || features->type == INTUOS3L ||
+				features->type == INTUOS4L) &&
 			   wacom->tool[idx] == BTN_TOOL_LENS) {
 			/* Lens cursor packets */
 			wacom_report_key(wcombo, BTN_LEFT,   data[8] & 0x01);
@@ -718,6 +723,7 @@ static void wacom_tpc_touch_in(struct wacom_wac *wacom, void *wcombo)
 
 static int wacom_tpc_irq(struct wacom_wac *wacom, void *wcombo)
 {
+	struct wacom_features *features = &wacom->features;
 	char *data = wacom->data;
 	int prox = 0, pressure, idx = -1;
 	static int stylusInProx, touchInProx = 1, touchOut;
@@ -791,7 +797,7 @@ static int wacom_tpc_irq(struct wacom_wac *wacom, void *wcombo)
 			wacom_report_abs(wcombo, ABS_Y, wacom_le16_to_cpu(&data[4]));
 			pressure = ((data[7] & 0x01) << 8) | data[6];
 			if (pressure < 0)
-				pressure = wacom->features->pressure_max + pressure + 1;
+				pressure = features->pressure_max + pressure + 1;
 			wacom_report_abs(wcombo, ABS_PRESSURE, pressure);
 			wacom_report_key(wcombo, BTN_TOUCH, data[1] & 0x05);
 		} else {
@@ -815,7 +821,7 @@ static int wacom_tpc_irq(struct wacom_wac *wacom, void *wcombo)
 
 int wacom_wac_irq(struct wacom_wac *wacom_wac, void *wcombo)
 {
-	switch (wacom_wac->features->type) {
+	switch (wacom_wac->features.type) {
 		case PENPARTNER:
 			return wacom_penpartner_irq(wacom_wac, wcombo);
 
@@ -853,7 +859,7 @@ int wacom_wac_irq(struct wacom_wac *wacom_wac, void *wcombo)
 
 void wacom_init_input_dev(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 {
-	switch (wacom_wac->features->type) {
+	switch (wacom_wac->features.type) {
 		case WACOM_MO:
 			input_dev_mo(input_dev, wacom_wac);
 		case WACOM_G4:
@@ -888,7 +894,7 @@ void wacom_init_input_dev(struct input_dev *input_dev, struct wacom_wac *wacom_w
 			/* fall through */
 		case TABLETPC:
 			input_dev_tpc(input_dev, wacom_wac);
-			if (wacom_wac->features->device_type != BTN_TOOL_PEN)
+			if (wacom_wac->features.device_type != BTN_TOOL_PEN)
 				break;  /* no need to process stylus stuff */
 
 			/* fall through */
diff --git a/drivers/input/tablet/wacom_wac.h b/drivers/input/tablet/wacom_wac.h
index ee01e1902785..3f4b89d51fe2 100644
--- a/drivers/input/tablet/wacom_wac.h
+++ b/drivers/input/tablet/wacom_wac.h
@@ -15,11 +15,11 @@
 /* packet length for individual models */
 #define WACOM_PKGLEN_PENPRTN	 7
 #define WACOM_PKGLEN_GRAPHIRE	 8
-#define WACOM_PKGLEN_BBFUN 	 9
-#define WACOM_PKGLEN_INTUOS 	10
+#define WACOM_PKGLEN_BBFUN	 9
+#define WACOM_PKGLEN_INTUOS	10
 #define WACOM_PKGLEN_PENABLED	 8
 #define WACOM_PKGLEN_TPC1FG	 5
-#define WACOM_PKGLEN_TPC2FG 	14
+#define WACOM_PKGLEN_TPC2FG	14
 
 /* device IDs */
 #define STYLUS_DEVICE_ID	0x02
@@ -58,7 +58,7 @@ enum {
 };
 
 struct wacom_features {
-	char *name;
+	const char *name;
 	int pktlen;
 	int x_max;
 	int y_max;
@@ -77,7 +77,7 @@ struct wacom_wac {
         int tool[2];
         int id[2];
         __u32 serial[2];
-	struct wacom_features *features;
+	struct wacom_features features;
 };
 
 #endif