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

Input: convert drivers/input/joystick 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, 52 insertions, 68 deletions

diff --git a/drivers/input/joystick/twidjoy.c b/drivers/input/joystick/twidjoy.c
index 0379bc166525..cd3a1e742a30 100644
--- a/drivers/input/joystick/twidjoy.c
+++ b/drivers/input/joystick/twidjoy.c
@@ -69,8 +69,6 @@ MODULE_LICENSE("GPL");
 
 #define TWIDJOY_MAX_LENGTH 5
 
-static char *twidjoy_name = "Handykey Twiddler";
-
 static struct twidjoy_button_spec {
         int bitshift;
         int bitmask;
@@ -95,7 +93,7 @@ twidjoy_buttons[] = {
  */
 
 struct twidjoy {
-        struct input_dev dev;
+        struct input_dev *dev;
         int idx;
         unsigned char data[TWIDJOY_MAX_LENGTH];
         char phys[32];
@@ -108,37 +106,33 @@ struct twidjoy {
 
 static void twidjoy_process_packet(struct twidjoy *twidjoy, struct pt_regs *regs)
 {
-        if (twidjoy->idx == TWIDJOY_MAX_LENGTH) {
-                struct input_dev *dev = &twidjoy->dev;
-                unsigned char *data = twidjoy->data;
-                struct twidjoy_button_spec *bp;
-                int button_bits, abs_x, abs_y;
-
-                button_bits = ((data[1] & 0x7f) << 7) | (data[0] & 0x7f);
+        struct input_dev *dev = twidjoy->dev;
+        unsigned char *data = twidjoy->data;
+        struct twidjoy_button_spec *bp;
+        int button_bits, abs_x, abs_y;
 
-                input_regs(dev, regs);
+        button_bits = ((data[1] & 0x7f) << 7) | (data[0] & 0x7f);
 
-                for (bp = twidjoy_buttons; bp->bitmask; bp++) {
-                        int value = (button_bits & (bp->bitmask << bp->bitshift)) >> bp->bitshift;
-                        int i;
+        input_regs(dev, regs);
 
-                        for (i = 0; i < bp->bitmask; i++)
-                                input_report_key(dev, bp->buttons[i], i+1 == value);
-                }
+        for (bp = twidjoy_buttons; bp->bitmask; bp++) {
+                int value = (button_bits & (bp->bitmask << bp->bitshift)) >> bp->bitshift;
+                int i;
 
-                abs_x = ((data[4] & 0x07) << 5) | ((data[3] & 0x7C) >> 2);
-                if (data[4] & 0x08) abs_x -= 256;
+                for (i = 0; i < bp->bitmask; i++)
+                        input_report_key(dev, bp->buttons[i], i+1 == value);
+        }
 
-                abs_y = ((data[3] & 0x01) << 7) | ((data[2] & 0x7F) >> 0);
-                if (data[3] & 0x02) abs_y -= 256;
+        abs_x = ((data[4] & 0x07) << 5) | ((data[3] & 0x7C) >> 2);
+        if (data[4] & 0x08) abs_x -= 256;
 
-                input_report_abs(dev, ABS_X, -abs_x);
-                input_report_abs(dev, ABS_Y, +abs_y);
+        abs_y = ((data[3] & 0x01) << 7) | ((data[2] & 0x7F) >> 0);
+        if (data[3] & 0x02) abs_y -= 256;
 
-                input_sync(dev);
-        }
+        input_report_abs(dev, ABS_X, -abs_x);
+        input_report_abs(dev, ABS_Y, +abs_y);
 
-        return;
+        input_sync(dev);
 }
 
 /*
@@ -179,9 +173,9 @@ static void twidjoy_disconnect(struct serio *serio)
 {
         struct twidjoy *twidjoy = serio_get_drvdata(serio);
 
-        input_unregister_device(&twidjoy->dev);
         serio_close(serio);
         serio_set_drvdata(serio, NULL);
+        input_unregister_device(twidjoy->dev);
         kfree(twidjoy);
 }
 
@@ -195,59 +189,49 @@ static int twidjoy_connect(struct serio *serio, struct serio_driver *drv)
 {
         struct twidjoy_button_spec *bp;
         struct twidjoy *twidjoy;
+        struct input_dev *input_dev;
+        int err = -ENOMEM;
         int i;
-        int err;
-
-        if (!(twidjoy = kmalloc(sizeof(struct twidjoy), GFP_KERNEL)))
-                return -ENOMEM;
 
-        memset(twidjoy, 0, sizeof(struct twidjoy));
+        twidjoy = kzalloc(sizeof(struct twidjoy), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!twidjoy || !input_dev)
+                goto fail;
 
+        twidjoy->dev = input_dev;
         sprintf(twidjoy->phys, "%s/input0", serio->phys);
 
-        init_input_dev(&twidjoy->dev);
-        twidjoy->dev.name = twidjoy_name;
-        twidjoy->dev.phys = twidjoy->phys;
-        twidjoy->dev.id.bustype = BUS_RS232;
-        twidjoy->dev.id.vendor = SERIO_TWIDJOY;
-        twidjoy->dev.id.product = 0x0001;
-        twidjoy->dev.id.version = 0x0100;
-        twidjoy->dev.dev = &serio->dev;
-
-        twidjoy->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
-
-        for (bp = twidjoy_buttons; bp->bitmask; bp++) {
+        input_dev->name = "Handykey Twiddler";
+        input_dev->phys = twidjoy->phys;
+        input_dev->id.bustype = BUS_RS232;
+        input_dev->id.vendor = SERIO_TWIDJOY;
+        input_dev->id.product = 0x0001;
+        input_dev->id.version = 0x0100;
+        input_dev->cdev.dev = &serio->dev;
+        input_dev->private = twidjoy;
+
+        input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+        input_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
+        input_set_abs_params(input_dev, ABS_X, -50, 50, 4, 4);
+        input_set_abs_params(input_dev, ABS_Y, -50, 50, 4, 4);
+
+        for (bp = twidjoy_buttons; bp->bitmask; bp++)
                 for (i = 0; i < bp->bitmask; i++)
-                        set_bit(bp->buttons[i], twidjoy->dev.keybit);
-        }
-
-        twidjoy->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
-
-        for (i = 0; i < 2; i++) {
-                twidjoy->dev.absmax[ABS_X+i] =  50;
-                twidjoy->dev.absmin[ABS_X+i] = -50;
-
-                /* TODO: arndt 20010708: Are these values appropriate? */
-                twidjoy->dev.absfuzz[ABS_X+i] = 4;
-                twidjoy->dev.absflat[ABS_X+i] = 4;
-        }
-
-        twidjoy->dev.private = twidjoy;
+                        set_bit(bp->buttons[i], input_dev->keybit);
 
         serio_set_drvdata(serio, twidjoy);
 
         err = serio_open(serio, drv);
-        if (err) {
-                serio_set_drvdata(serio, NULL);
-                kfree(twidjoy);
-                return err;
-        }
-
-        input_register_device(&twidjoy->dev);
-
-        printk(KERN_INFO "input: %s on %s\n", twidjoy_name, serio->phys);
+        if (err)
+                goto fail;
 
+        input_register_device(twidjoy->dev);
         return 0;
+
+ fail:  serio_set_drvdata(serio, NULL);
+        input_free_device(input_dev);
+        kfree(twidjoy);
+        return err;
 }
 
 /*