int vend_idx;           /* vendor found */
        int b_mode[2];          /* B-channel mode */
        int l1_activated;       /* layer 1 activated */
-       int disc_flag;          /* TRUE if device was disonnected to avoid some USB actions */
+       int disc_flag;          /* 'true' if device was disonnected to avoid some USB actions */
        int packet_size, iso_packet_size;
 
        /* control pipe background handling */
        DBG(ISDN_DBG,
            "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T3 expire)");
 #endif
-       hfc->l1_activated = FALSE;
+       hfc->l1_activated = false;
        handle_led(hfc, LED_S0_OFF);
        /* deactivate : */
        queue_control_request(hfc, HFCUSB_STATES, 0x10, 1);
        DBG(ISDN_DBG,
            "HFC-S USB: PH_DEACTIVATE | INDICATION sent (T4 expire)");
 #endif
-       hfc->l1_activated = FALSE;
+       hfc->l1_activated = false;
        handle_led(hfc, LED_S0_OFF);
 }
 
 #ifdef CONFIG_HISAX_DEBUG
                DBG(ISDN_DBG, "HFC-S USB: PH_ACTIVATE | INDICATION sent");
 #endif
-               hfc->l1_activated = TRUE;
+               hfc->l1_activated = true;
                handle_led(hfc, LED_S0_ON);
        } else if (state <= 3 /* && activated */ ) {
                if (old_state == 7 || old_state == 8) {
                        DBG(ISDN_DBG,
                            "HFC-S USB: PH_DEACTIVATE | INDICATION sent");
 #endif
-                       hfc->l1_activated = FALSE;
+                       hfc->l1_activated = false;
                        handle_led(hfc, LED_S0_OFF);
                }
        }
        if (fifo->active && !status) {
                transp_mode = 0;
                if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
-                       transp_mode = TRUE;
+                       transp_mode = true;
 
                /* is FifoFull-threshold set for our channel? */
                threshbit = threshtable[fifon] & hfc->threshold_mask;
                              tx_iso_complete, urb->context);
                memset(context_iso_urb->buffer, 0,
                       sizeof(context_iso_urb->buffer));
-               frame_complete = FALSE;
+               frame_complete = false;
                /* Generate next Iso Packets */
                for (k = 0; k < num_isoc_packets; ++k) {
                        if (fifo->skbuff) {
                                                /* add 2 byte flags and 16bit CRC at end of ISDN frame */
                                                fifo->bit_line += 32;
                                        }
-                                       frame_complete = TRUE;
+                                       frame_complete = true;
                                }
 
                                memcpy(context_iso_urb->buffer +
                        }
 
                        if (frame_complete) {
-                               fifo->delete_flg = TRUE;
+                               fifo->delete_flg = true;
                                fifo->hif->l1l2(fifo->hif,
                                                PH_DATA | CONFIRM,
                                                (void *) (unsigned long) fifo->skbuff->
                                if (fifo->skbuff && fifo->delete_flg) {
                                        dev_kfree_skb_any(fifo->skbuff);
                                        fifo->skbuff = NULL;
-                                       fifo->delete_flg = FALSE;
+                                       fifo->delete_flg = false;
                                }
-                               frame_complete = FALSE;
+                               frame_complete = false;
                        }
                }
                errcode = usb_submit_urb(urb, GFP_ATOMIC);
        fifon = fifo->fifonum;
        transp_mode = 0;
        if (fifon < 4 && hfc->b_mode[fifon / 2] == L1_MODE_TRANS)
-               transp_mode = TRUE;
+               transp_mode = true;
 
        if (!fifo->skbuff) {
                fifo->skbuff = dev_alloc_skb(fifo->max_size + 3);
                        if (fifo->skbuff && fifo->delete_flg) {
                                dev_kfree_skb_any(fifo->skbuff);
                                fifo->skbuff = NULL;
-                               fifo->delete_flg = FALSE;
+                               fifo->delete_flg = false;
                        }
                        fifo->skbuff = arg;     /* we have a new buffer */
                        break;
        hfc->b_mode[0] = L1_MODE_NULL;
        hfc->b_mode[1] = L1_MODE_NULL;
 
-       hfc->l1_activated = FALSE;
-       hfc->disc_flag = FALSE;
+       hfc->l1_activated = false;
+       hfc->disc_flag = false;
        hfc->led_state = 0;
        hfc->led_new_data = 0;
        hfc->old_led_state = 0;
 
                        /* check for config EOL element */
                        while (validconf[cfg_used][0]) {
-                               cfg_found = TRUE;
+                               cfg_found = true;
                                vcf = validconf[cfg_used];
                                /* first endpoint descriptor */
                                ep = iface->endpoint;
                                                idx++;
                                        attr = ep->desc.bmAttributes;
                                        if (cmptbl[idx] == EP_NUL) {
-                                               cfg_found = FALSE;
+                                               cfg_found = false;
                                        }
                                        if (attr == USB_ENDPOINT_XFER_INT
                                            && cmptbl[idx] == EP_INT)
                                                            "HFC-S USB: Interrupt Endpoint interval < %d found - skipping config",
                                                            vcf[17]);
 #endif
-                                               cfg_found = FALSE;
+                                               cfg_found = false;
                                        }
                                        ep++;
                                }
                                        /* all entries must be EP_NOP or EP_NUL for a valid config */
                                        if (cmptbl[i] != EP_NOP
                                            && cmptbl[i] != EP_NUL)
-                                               cfg_found = FALSE;
+                                               cfg_found = false;
                                }
                                if (cfg_found) {
                                        if (cfg_used < small_match) {
        hfcusb_data *context = usb_get_intfdata(intf);
        int i;
        printk(KERN_INFO "HFC-S USB: device disconnect\n");
-       context->disc_flag = TRUE;
+       context->disc_flag = true;
        usb_set_intfdata(intf, NULL);
        if (!context)
                return;