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176 lines
4.6 KiB
176 lines
4.6 KiB
/******************************************************************************
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* usb_atm.h - Generic USB xDSL driver core
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*
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* Copyright (C) 2001, Alcatel
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* Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas
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* Copyright (C) 2004, David Woodhouse
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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******************************************************************************/
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#include <linux/config.h>
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#include <linux/list.h>
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#include <linux/kref.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <asm/semaphore.h>
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/*
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#define DEBUG
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#define VERBOSE_DEBUG
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*/
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#if !defined (DEBUG) && defined (CONFIG_USB_DEBUG)
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# define DEBUG
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#endif
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#include <linux/usb.h>
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#ifdef DEBUG
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#define UDSL_ASSERT(x) BUG_ON(!(x))
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#else
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#define UDSL_ASSERT(x) do { if (!(x)) warn("failed assertion '" #x "' at line %d", __LINE__); } while(0)
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#endif
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#define UDSL_MAX_RCV_URBS 4
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#define UDSL_MAX_SND_URBS 4
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#define UDSL_MAX_RCV_BUFS 8
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#define UDSL_MAX_SND_BUFS 8
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#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */
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#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */
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#define UDSL_DEFAULT_RCV_URBS 2
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#define UDSL_DEFAULT_SND_URBS 2
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#define UDSL_DEFAULT_RCV_BUFS 4
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#define UDSL_DEFAULT_SND_BUFS 4
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#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */
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#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */
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#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD)
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#define UDSL_NUM_CELLS(x) (((x) + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD)
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/* receive */
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struct udsl_receive_buffer {
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struct list_head list;
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unsigned char *base;
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unsigned int filled_cells;
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};
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struct udsl_receiver {
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struct list_head list;
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struct udsl_receive_buffer *buffer;
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struct urb *urb;
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struct udsl_instance_data *instance;
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};
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struct udsl_vcc_data {
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/* vpi/vci lookup */
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struct list_head list;
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short vpi;
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int vci;
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struct atm_vcc *vcc;
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/* raw cell reassembly */
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struct sk_buff *sarb;
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};
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/* send */
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struct udsl_send_buffer {
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struct list_head list;
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unsigned char *base;
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unsigned char *free_start;
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unsigned int free_cells;
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};
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struct udsl_sender {
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struct list_head list;
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struct udsl_send_buffer *buffer;
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struct urb *urb;
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struct udsl_instance_data *instance;
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};
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struct udsl_control {
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struct atm_skb_data atm_data;
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unsigned int num_cells;
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unsigned int num_entire;
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unsigned int pdu_padding;
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unsigned char aal5_trailer[ATM_AAL5_TRAILER];
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};
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#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb)
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/* main driver data */
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enum udsl_status {
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UDSL_NO_FIRMWARE,
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UDSL_LOADING_FIRMWARE,
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UDSL_LOADED_FIRMWARE
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};
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struct udsl_instance_data {
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struct kref refcount;
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struct semaphore serialize;
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/* USB device part */
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struct usb_device *usb_dev;
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char description[64];
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int data_endpoint;
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int snd_padding;
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int rcv_padding;
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const char *driver_name;
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/* ATM device part */
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struct atm_dev *atm_dev;
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struct list_head vcc_list;
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/* firmware */
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int (*firmware_wait) (struct udsl_instance_data *);
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enum udsl_status status;
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wait_queue_head_t firmware_waiters;
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/* receive */
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struct udsl_receiver receivers[UDSL_MAX_RCV_URBS];
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struct udsl_receive_buffer receive_buffers[UDSL_MAX_RCV_BUFS];
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spinlock_t receive_lock;
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struct list_head spare_receivers;
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struct list_head filled_receive_buffers;
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struct tasklet_struct receive_tasklet;
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struct list_head spare_receive_buffers;
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/* send */
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struct udsl_sender senders[UDSL_MAX_SND_URBS];
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struct udsl_send_buffer send_buffers[UDSL_MAX_SND_BUFS];
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struct sk_buff_head sndqueue;
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spinlock_t send_lock;
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struct list_head spare_senders;
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struct list_head spare_send_buffers;
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struct tasklet_struct send_tasklet;
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struct sk_buff *current_skb; /* being emptied */
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struct udsl_send_buffer *current_buffer; /* being filled */
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struct list_head filled_send_buffers;
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};
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extern int udsl_instance_setup(struct usb_device *dev,
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struct udsl_instance_data *instance);
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extern void udsl_instance_disconnect(struct udsl_instance_data *instance);
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extern void udsl_get_instance(struct udsl_instance_data *instance);
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extern void udsl_put_instance(struct udsl_instance_data *instance);
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