+static inline int rotary_delta(uint32_t kprec)
+{
+ if (kprec & KPREC_OF0)
+ return (kprec & 0xff) + 0x7f;
+ else if (kprec & KPREC_UF0)
+ return (kprec & 0xff) - 0x7f - 0xff;
+ else
+ return (kprec & 0xff) - 0x7f;
+}
+
+static void report_rotary_event(struct pxa27x_keypad *keypad, int r, int delta)
+{
+ struct input_dev *dev = keypad->input_dev;
+
+ if (delta == 0)
+ return;
+
+ if (keypad->rotary_up_key[r] && keypad->rotary_down_key[r]) {
+ int keycode = (delta > 0) ? keypad->rotary_up_key[r] :
+ keypad->rotary_down_key[r];
+
+ /* simulate a press-n-release */
+ input_report_key(dev, keycode, 1);
+ input_sync(dev);
+ input_report_key(dev, keycode, 0);
+ input_sync(dev);
+ } else {
+ input_report_rel(dev, keypad->rotary_rel_code[r], delta);
+ input_sync(dev);
+ }
+}
+
+static void pxa27x_keypad_scan_rotary(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ uint32_t kprec;
+
+ /* read and reset to default count value */
+ kprec = KPREC;
+ KPREC = DEFAULT_KPREC;
+
+ if (pdata->enable_rotary0)
+ report_rotary_event(keypad, 0, rotary_delta(kprec));
+
+ if (pdata->enable_rotary1)
+ report_rotary_event(keypad, 1, rotary_delta(kprec >> 16));
+}
+
+static void pxa27x_keypad_scan_direct(struct pxa27x_keypad *keypad)
+{
+ struct pxa27x_keypad_platform_data *pdata = keypad->pdata;
+ unsigned int new_state;
+ uint32_t kpdk, bits_changed;
+ int i;
+
+ kpdk = KPDK;
+
+ if (pdata->enable_rotary0 || pdata->enable_rotary1)
+ pxa27x_keypad_scan_rotary(keypad);
+
+ if (pdata->direct_key_map == NULL)
+ return;
+
+ new_state = KPDK_DK(kpdk) & keypad->direct_key_mask;
+ bits_changed = keypad->direct_key_state ^ new_state;
+
+ if (bits_changed == 0)
+ return;
+
+ for (i = 0; i < pdata->direct_key_num; i++) {
+ if (bits_changed & (1 << i))
+ input_report_key(keypad->input_dev,
+ pdata->direct_key_map[i],
+ (new_state & (1 << i)));
+ }
+ input_sync(keypad->input_dev);
+ keypad->direct_key_state = new_state;
+}
+