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