forked from Minki/linux
[PATCH] USB ATM: new usbatm core
Rework the core usbatm code: minidrivers (i.e. drivers for particular modems) now register themselves with the usbatm core, supplying methods for binding/unbinding etc. The design was inspired by usb-serial and usbnet. At the same time, more common code from the speedtch and cxacru (patch 3/5) drivers was generalized and moved into the core. The transmission and reception parts have been unified and simplified. Since this is a major change and I don't like underscores in file names, usb_atm.[ch] has been renamed usbatm.[ch]. Many thanks to Roman Kagan, who did a lot of the coding. Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Duncan Sands
Greg Kroah-Hartman
parent
d49d431744
commit
c59bba75fa
File diff suppressed because it is too large
Load Diff
@ -1,176 +0,0 @@
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/******************************************************************************
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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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1231
drivers/usb/atm/usbatm.c
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1231
drivers/usb/atm/usbatm.c
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File diff suppressed because it is too large
Load Diff
183
drivers/usb/atm/usbatm.h
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183
drivers/usb/atm/usbatm.h
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@ -0,0 +1,183 @@
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/******************************************************************************
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* usbatm.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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#ifndef _USBATM_H_
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#define _USBATM_H_
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#include <linux/config.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 <asm/semaphore.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/kref.h>
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#include <linux/list.h>
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#include <linux/stringify.h>
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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 '%s' at line %d", __stringify(x), __LINE__); } while(0)
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#endif
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#define usb_err(instance, format, arg...) \
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dev_err(&(instance)->usb_intf->dev , format , ## arg)
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#define usb_info(instance, format, arg...) \
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dev_info(&(instance)->usb_intf->dev , format , ## arg)
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#define usb_warn(instance, format, arg...) \
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dev_warn(&(instance)->usb_intf->dev , format , ## arg)
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#define usb_dbg(instance, format, arg...) \
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dev_dbg(&(instance)->usb_intf->dev , format , ## arg)
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/* FIXME: move to dev_* once ATM is driver model aware */
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#define atm_printk(level, instance, format, arg...) \
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printk(level "ATM dev %d: " format , (instance)->atm_dev->number, ## arg)
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#define atm_err(instance, format, arg...) \
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atm_printk(KERN_ERR, instance , format , ## arg)
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#define atm_info(instance, format, arg...) \
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atm_printk(KERN_INFO, instance , format , ## arg)
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#define atm_warn(instance, format, arg...) \
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atm_printk(KERN_WARNING, instance , format , ## arg)
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#ifdef DEBUG
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#define atm_dbg(instance, format, arg...) \
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atm_printk(KERN_DEBUG, instance , format , ## arg)
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#else
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#define atm_dbg(instance, format, arg...) \
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do {} while (0)
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#endif
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/* mini driver */
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struct usbatm_data;
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/*
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* Assuming all methods exist and succeed, they are called in this order:
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*
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* bind, heavy_init, atm_start, ..., atm_stop, unbind
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*/
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struct usbatm_driver {
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struct module *owner;
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const char *driver_name;
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/*
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* init device ... can sleep, or cause probe() failure. Drivers with a heavy_init
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* method can avoid having it called by setting need_heavy_init to zero.
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*/
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int (*bind) (struct usbatm_data *, struct usb_interface *,
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const struct usb_device_id *id, int *need_heavy_init);
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/* additional device initialization that is too slow to be done in probe() */
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int (*heavy_init) (struct usbatm_data *, struct usb_interface *);
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/* cleanup device ... can sleep, but can't fail */
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void (*unbind) (struct usbatm_data *, struct usb_interface *);
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/* init ATM device ... can sleep, or cause ATM initialization failure */
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int (*atm_start) (struct usbatm_data *, struct atm_dev *);
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/* cleanup ATM device ... can sleep, but can't fail */
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void (*atm_stop) (struct usbatm_data *, struct atm_dev *);
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int in; /* rx endpoint */
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int out; /* tx endpoint */
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unsigned rx_padding;
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unsigned tx_padding;
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};
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extern int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
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struct usbatm_driver *driver);
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extern void usbatm_usb_disconnect(struct usb_interface *intf);
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struct usbatm_channel {
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int endpoint; /* usb pipe */
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unsigned int stride; /* ATM cell size + padding */
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unsigned int buf_size; /* urb buffer size */
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spinlock_t lock;
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struct list_head list;
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struct tasklet_struct tasklet;
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struct timer_list delay;
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struct usbatm_data *usbatm;
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};
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/* main driver data */
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struct usbatm_data {
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/******************
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* public fields *
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******************/
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/* mini driver */
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struct usbatm_driver *driver;
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void *driver_data;
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char driver_name[16];
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/* USB device */
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struct usb_device *usb_dev;
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struct usb_interface *usb_intf;
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char description[64];
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/* ATM device */
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struct atm_dev *atm_dev;
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/********************************
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* private fields - do not use *
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********************************/
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struct kref refcount;
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struct semaphore serialize;
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/* heavy init */
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int thread_pid;
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struct completion thread_started;
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struct completion thread_exited;
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/* ATM device */
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struct list_head vcc_list;
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struct usbatm_channel rx_channel;
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struct usbatm_channel tx_channel;
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struct sk_buff_head sndqueue;
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struct sk_buff *current_skb; /* being emptied */
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struct urb *urbs[0];
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};
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#endif /* _USBATM_H_ */
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