[PATCH] drivers/usb/input: convert to dynamic input_dev allocation

Input: convert drivers/iusb/input to dynamic input_dev allocation

This is required for input_dev sysfs integration

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 93 insertions, 116 deletions

diff --git a/drivers/usb/input/aiptek.c b/drivers/usb/input/aiptek.c
index cd0cbfe20723..1c5205321d83 100644
--- a/drivers/usb/input/aiptek.c
+++ b/drivers/usb/input/aiptek.c
@@ -317,7 +317,7 @@ struct aiptek_settings {
 };
 
 struct aiptek {
-        struct input_dev inputdev;              /* input device struct           */
+        struct input_dev *inputdev;             /* input device struct           */
         struct usb_device *usbdev;              /* usb device struct             */
         struct urb *urb;                        /* urb for incoming reports      */
         dma_addr_t data_dma;                    /* our dma stuffage              */
@@ -402,7 +402,7 @@ static void aiptek_irq(struct urb *urb, struct pt_regs *regs)
 {
         struct aiptek *aiptek = urb->context;
         unsigned char *data = aiptek->data;
-        struct input_dev *inputdev = &aiptek->inputdev;
+        struct input_dev *inputdev = aiptek->inputdev;
         int jitterable = 0;
         int retval, macro, x, y, z, left, right, middle, p, dv, tip, bs, pck;
 
@@ -955,20 +955,20 @@ static int aiptek_program_tablet(struct aiptek *aiptek)
         /* Query getXextension */
         if ((ret = aiptek_query(aiptek, 0x01, 0x00)) < 0)
                 return ret;
-        aiptek->inputdev.absmin[ABS_X] = 0;
-        aiptek->inputdev.absmax[ABS_X] = ret - 1;
+        aiptek->inputdev->absmin[ABS_X] = 0;
+        aiptek->inputdev->absmax[ABS_X] = ret - 1;
 
         /* Query getYextension */
         if ((ret = aiptek_query(aiptek, 0x01, 0x01)) < 0)
                 return ret;
-        aiptek->inputdev.absmin[ABS_Y] = 0;
-        aiptek->inputdev.absmax[ABS_Y] = ret - 1;
+        aiptek->inputdev->absmin[ABS_Y] = 0;
+        aiptek->inputdev->absmax[ABS_Y] = ret - 1;
 
         /* Query getPressureLevels */
         if ((ret = aiptek_query(aiptek, 0x08, 0x00)) < 0)
                 return ret;
-        aiptek->inputdev.absmin[ABS_PRESSURE] = 0;
-        aiptek->inputdev.absmax[ABS_PRESSURE] = ret - 1;
+        aiptek->inputdev->absmin[ABS_PRESSURE] = 0;
+        aiptek->inputdev->absmax[ABS_PRESSURE] = ret - 1;
 
         /* Depending on whether we are in absolute or relative mode, we will
          * do a switchToTablet(absolute) or switchToMouse(relative) command.
@@ -1025,8 +1025,8 @@ static ssize_t show_tabletSize(struct device *dev, struct device_attribute *attr
                 return 0;
 
         return snprintf(buf, PAGE_SIZE, "%dx%d\n",
-                        aiptek->inputdev.absmax[ABS_X] + 1,
-                        aiptek->inputdev.absmax[ABS_Y] + 1);
+                        aiptek->inputdev->absmax[ABS_X] + 1,
+                        aiptek->inputdev->absmax[ABS_Y] + 1);
 }
 
 /* These structs define the sysfs files, param #1 is the name of the
@@ -1048,7 +1048,7 @@ static ssize_t show_tabletProductId(struct device *dev, struct device_attribute
                 return 0;
 
         return snprintf(buf, PAGE_SIZE, "0x%04x\n",
-                        aiptek->inputdev.id.product);
+                        aiptek->inputdev->id.product);
 }
 
 static DEVICE_ATTR(product_id, S_IRUGO, show_tabletProductId, NULL);
@@ -1063,7 +1063,7 @@ static ssize_t show_tabletVendorId(struct device *dev, struct device_attribute *
         if (aiptek == NULL)
                 return 0;
 
-        return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->inputdev.id.vendor);
+        return snprintf(buf, PAGE_SIZE, "0x%04x\n", aiptek->inputdev->id.vendor);
 }
 
 static DEVICE_ATTR(vendor_id, S_IRUGO, show_tabletVendorId, NULL);
@@ -1977,7 +1977,6 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
         struct input_dev *inputdev;
         struct input_handle *inputhandle;
         struct list_head *node, *next;
-        char path[64 + 1];
         int i;
         int speeds[] = { 0,
                 AIPTEK_PROGRAMMABLE_DELAY_50,
@@ -1996,24 +1995,26 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
          */
         speeds[0] = programmableDelay;
 
-        if ((aiptek = kmalloc(sizeof(struct aiptek), GFP_KERNEL)) == NULL)
-                return -ENOMEM;
-        memset(aiptek, 0, sizeof(struct aiptek));
+        aiptek = kzalloc(sizeof(struct aiptek), GFP_KERNEL);
+        inputdev = input_allocate_device();
+        if (!aiptek || !inputdev)
+                goto fail1;
 
         aiptek->data = usb_buffer_alloc(usbdev, AIPTEK_PACKET_LENGTH,
                                         SLAB_ATOMIC, &aiptek->data_dma);
-        if (aiptek->data == NULL) {
-                kfree(aiptek);
-                return -ENOMEM;
-        }
+        if (!aiptek->data)
+                goto fail1;
 
         aiptek->urb = usb_alloc_urb(0, GFP_KERNEL);
-        if (aiptek->urb == NULL) {
-                usb_buffer_free(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
-                                aiptek->data_dma);
-                kfree(aiptek);
-                return -ENOMEM;
-        }
+        if (!aiptek->urb)
+                goto fail2;
+
+        aiptek->inputdev = inputdev;
+        aiptek->usbdev = usbdev;
+        aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
+        aiptek->inDelay = 0;
+        aiptek->endDelay = 0;
+        aiptek->previousJitterable = 0;
 
         /* Set up the curSettings struct. Said struct contains the current
          * programmable parameters. The newSetting struct contains changes
@@ -2036,31 +2037,48 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
 
         /* Both structs should have equivalent settings
          */
-        memcpy(&aiptek->newSetting, &aiptek->curSetting,
-               sizeof(struct aiptek_settings));
+        aiptek->newSetting = aiptek->curSetting;
+
+        /* Determine the usb devices' physical path.
+         * Asketh not why we always pretend we're using "../input0",
+         * but I suspect this will have to be refactored one
+         * day if a single USB device can be a keyboard & a mouse
+         * & a tablet, and the inputX number actually will tell
+         * us something...
+         */
+        usb_make_path(usbdev, aiptek->features.usbPath,
+                        sizeof(aiptek->features.usbPath));
+        strlcat(aiptek->features.usbPath, "/input0",
+                sizeof(aiptek->features.usbPath));
+
+        /* Set up client data, pointers to open and close routines
+         * for the input device.
+         */
+        inputdev->name = "Aiptek";
+        inputdev->phys = aiptek->features.usbPath;
+        usb_to_input_id(usbdev, &inputdev->id);
+        inputdev->cdev.dev = &intf->dev;
+        inputdev->private = aiptek;
+        inputdev->open = aiptek_open;
+        inputdev->close = aiptek_close;
 
         /* Now program the capacities of the tablet, in terms of being
          * an input device.
          */
-        aiptek->inputdev.evbit[0] |= BIT(EV_KEY)
+        inputdev->evbit[0] |= BIT(EV_KEY)
             | BIT(EV_ABS)
             | BIT(EV_REL)
             | BIT(EV_MSC);
 
-        aiptek->inputdev.absbit[0] |=
-            (BIT(ABS_X) |
-             BIT(ABS_Y) |
-             BIT(ABS_PRESSURE) |
-             BIT(ABS_TILT_X) |
-             BIT(ABS_TILT_Y) | BIT(ABS_WHEEL) | BIT(ABS_MISC));
+        inputdev->absbit[0] |= BIT(ABS_MISC);
 
-        aiptek->inputdev.relbit[0] |=
+        inputdev->relbit[0] |=
             (BIT(REL_X) | BIT(REL_Y) | BIT(REL_WHEEL) | BIT(REL_MISC));
 
-        aiptek->inputdev.keybit[LONG(BTN_LEFT)] |=
+        inputdev->keybit[LONG(BTN_LEFT)] |=
             (BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE));
 
-        aiptek->inputdev.keybit[LONG(BTN_DIGI)] |=
+        inputdev->keybit[LONG(BTN_DIGI)] |=
             (BIT(BTN_TOOL_PEN) |
              BIT(BTN_TOOL_RUBBER) |
              BIT(BTN_TOOL_PENCIL) |
@@ -2070,70 +2088,26 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
              BIT(BTN_TOOL_LENS) |
              BIT(BTN_TOUCH) | BIT(BTN_STYLUS) | BIT(BTN_STYLUS2));
 
-        aiptek->inputdev.mscbit[0] = BIT(MSC_SERIAL);
+        inputdev->mscbit[0] = BIT(MSC_SERIAL);
 
         /* Programming the tablet macro keys needs to be done with a for loop
          * as the keycodes are discontiguous.
          */
         for (i = 0; i < sizeof(macroKeyEvents) / sizeof(macroKeyEvents[0]); ++i)
-                set_bit(macroKeyEvents[i], aiptek->inputdev.keybit);
-
-        /* Set up client data, pointers to open and close routines
-         * for the input device.
-         */
-        aiptek->inputdev.private = aiptek;
-        aiptek->inputdev.open = aiptek_open;
-        aiptek->inputdev.close = aiptek_close;
-
-        /* Determine the usb devices' physical path.
-         * Asketh not why we always pretend we're using "../input0",
-         * but I suspect this will have to be refactored one
-         * day if a single USB device can be a keyboard & a mouse
-         * & a tablet, and the inputX number actually will tell
-         * us something...
-         */
-        if (usb_make_path(usbdev, path, 64) > 0)
-                sprintf(aiptek->features.usbPath, "%s/input0", path);
+                set_bit(macroKeyEvents[i], inputdev->keybit);
 
-        /* Program the input device coordinate capacities. We do not yet
+        /*
+         * Program the input device coordinate capacities. We do not yet
          * know what maximum X, Y, and Z values are, so we're putting fake
          * values in. Later, we'll ask the tablet to put in the correct
          * values.
          */
-        aiptek->inputdev.absmin[ABS_X] = 0;
-        aiptek->inputdev.absmax[ABS_X] = 2999;
-        aiptek->inputdev.absmin[ABS_Y] = 0;
-        aiptek->inputdev.absmax[ABS_Y] = 2249;
-        aiptek->inputdev.absmin[ABS_PRESSURE] = 0;
-        aiptek->inputdev.absmax[ABS_PRESSURE] = 511;
-        aiptek->inputdev.absmin[ABS_TILT_X] = AIPTEK_TILT_MIN;
-        aiptek->inputdev.absmax[ABS_TILT_X] = AIPTEK_TILT_MAX;
-        aiptek->inputdev.absmin[ABS_TILT_Y] = AIPTEK_TILT_MIN;
-        aiptek->inputdev.absmax[ABS_TILT_Y] = AIPTEK_TILT_MAX;
-        aiptek->inputdev.absmin[ABS_WHEEL] = AIPTEK_WHEEL_MIN;
-        aiptek->inputdev.absmax[ABS_WHEEL] = AIPTEK_WHEEL_MAX - 1;
-        aiptek->inputdev.absfuzz[ABS_X] = 0;
-        aiptek->inputdev.absfuzz[ABS_Y] = 0;
-        aiptek->inputdev.absfuzz[ABS_PRESSURE] = 0;
-        aiptek->inputdev.absfuzz[ABS_TILT_X] = 0;
-        aiptek->inputdev.absfuzz[ABS_TILT_Y] = 0;
-        aiptek->inputdev.absfuzz[ABS_WHEEL] = 0;
-        aiptek->inputdev.absflat[ABS_X] = 0;
-        aiptek->inputdev.absflat[ABS_Y] = 0;
-        aiptek->inputdev.absflat[ABS_PRESSURE] = 0;
-        aiptek->inputdev.absflat[ABS_TILT_X] = 0;
-        aiptek->inputdev.absflat[ABS_TILT_Y] = 0;
-        aiptek->inputdev.absflat[ABS_WHEEL] = 0;
-        aiptek->inputdev.name = "Aiptek";
-        aiptek->inputdev.phys = aiptek->features.usbPath;
-        usb_to_input_id(usbdev, &aiptek->inputdev.id);
-        aiptek->inputdev.dev = &intf->dev;
-
-        aiptek->usbdev = usbdev;
-        aiptek->ifnum = intf->altsetting[0].desc.bInterfaceNumber;
-        aiptek->inDelay = 0;
-        aiptek->endDelay = 0;
-        aiptek->previousJitterable = 0;
+        input_set_abs_params(inputdev, ABS_X, 0, 2999, 0, 0);
+        input_set_abs_params(inputdev, ABS_X, 0, 2249, 0, 0);
+        input_set_abs_params(inputdev, ABS_PRESSURE, 0, 511, 0, 0);
+        input_set_abs_params(inputdev, ABS_TILT_X, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
+        input_set_abs_params(inputdev, ABS_TILT_Y, AIPTEK_TILT_MIN, AIPTEK_TILT_MAX, 0, 0);
+        input_set_abs_params(inputdev, ABS_WHEEL, AIPTEK_WHEEL_MIN, AIPTEK_WHEEL_MAX - 1, 0, 0);
 
         endpoint = &intf->altsetting[0].endpoint[0].desc;
 
@@ -2150,28 +2124,6 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
         aiptek->urb->transfer_dma = aiptek->data_dma;
         aiptek->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 
-        /* Register the tablet as an Input Device
-         */
-        input_register_device(&aiptek->inputdev);
-
-        /* We now will look for the evdev device which is mapped to
-         * the tablet. The partial name is kept in the link list of
-         * input_handles associated with this input device.
-         * What identifies an evdev input_handler is that it begins
-         * with 'event', continues with a digit, and that in turn
-         * is mapped to /{devfs}/input/eventN.
-         */
-        inputdev = &aiptek->inputdev;
-        list_for_each_safe(node, next, &inputdev->h_list) {
-                inputhandle = to_handle(node);
-                if (strncmp(inputhandle->name, "event", 5) == 0) {
-                        strcpy(aiptek->features.inputPath, inputhandle->name);
-                        break;
-                }
-        }
-
-        info("input: Aiptek on %s (%s)\n", path, aiptek->features.inputPath);
-
         /* Program the tablet. This sets the tablet up in the mode
          * specified in newSetting, and also queries the tablet's
          * physical capacities.
@@ -2186,13 +2138,32 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
         for (i = 0; i < sizeof(speeds) / sizeof(speeds[0]); ++i) {
                 aiptek->curSetting.programmableDelay = speeds[i];
                 (void)aiptek_program_tablet(aiptek);
-                if (aiptek->inputdev.absmax[ABS_X] > 0) {
+                if (aiptek->inputdev->absmax[ABS_X] > 0) {
                         info("input: Aiptek using %d ms programming speed\n",
                              aiptek->curSetting.programmableDelay);
                         break;
                 }
         }
 
+        /* Register the tablet as an Input Device
+         */
+        input_register_device(aiptek->inputdev);
+
+        /* We now will look for the evdev device which is mapped to
+         * the tablet. The partial name is kept in the link list of
+         * input_handles associated with this input device.
+         * What identifies an evdev input_handler is that it begins
+         * with 'event', continues with a digit, and that in turn
+         * is mapped to /{devfs}/input/eventN.
+         */
+        list_for_each_safe(node, next, &inputdev->h_list) {
+                inputhandle = to_handle(node);
+                if (strncmp(inputhandle->name, "event", 5) == 0) {
+                        strcpy(aiptek->features.inputPath, inputhandle->name);
+                        break;
+                }
+        }
+
         /* Associate this driver's struct with the usb interface.
          */
         usb_set_intfdata(intf, aiptek);
@@ -2207,6 +2178,12 @@ aiptek_probe(struct usb_interface *intf, const struct usb_device_id *id)
                 info("aiptek: error loading 'evdev' module");
 
         return 0;
+
+fail2:  usb_buffer_free(usbdev, AIPTEK_PACKET_LENGTH, aiptek->data,
+                        aiptek->data_dma);
+fail1:  input_free_device(inputdev);
+        kfree(aiptek);
+        return -ENOMEM;
 }
 
 /* Forward declaration */
@@ -2234,7 +2211,7 @@ static void aiptek_disconnect(struct usb_interface *intf)
                 /* Free & unhook everything from the system.
                  */
                 usb_kill_urb(aiptek->urb);
-                input_unregister_device(&aiptek->inputdev);
+                input_unregister_device(aiptek->inputdev);
                 aiptek_delete_files(&intf->dev);
                 usb_free_urb(aiptek->urb);
                 usb_buffer_free(interface_to_usbdev(intf),