ChangeSet 1.1143.1.3, 2003/03/19 11:23:08-08:00, baldrick@wanadoo.fr [PATCH] USB speedtouch: get rid of atmsar There are really only two patches: add atmsar stuff into speedtouch.c; and update the Makefile. The other changes are: delete atmsar.c and atmsar.h, rename speedtouch.c to speedtch.c. drivers/usb/misc/atmsar.c | 380 ---------- drivers/usb/misc/atmsar.h | 87 -- drivers/usb/misc/speedtouch.c | 1216 --------------------------------- drivers/usb/misc/Makefile | 2 drivers/usb/misc/speedtch.c | 1514 ++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 1514 insertions(+), 1685 deletions(-) diff -Nru a/drivers/usb/misc/Makefile b/drivers/usb/misc/Makefile --- a/drivers/usb/misc/Makefile Thu Mar 20 15:04:07 2003 +++ b/drivers/usb/misc/Makefile Thu Mar 20 15:04:07 2003 @@ -12,5 +12,3 @@ obj-$(CONFIG_USB_TEST) += usbtest.o obj-$(CONFIG_USB_TIGL) += tiglusb.o obj-$(CONFIG_USB_USS720) += uss720.o - -speedtch-objs := speedtouch.o atmsar.o diff -Nru a/drivers/usb/misc/atmsar.c b/drivers/usb/misc/atmsar.c --- a/drivers/usb/misc/atmsar.c Thu Mar 20 15:04:07 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,380 +0,0 @@ -/****************************************************************************** - * atmsar.c -- General SAR library for ATM devices. - * - * Copyright (C) 2000, Johan Verrept - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - ******************************************************************************/ - -/* - * Written by Johan Verrept (Johan.Verrept@advalvas.be) - * - * 0.2.4A: - Version for inclusion in 2.5 series kernel - * - Modifications by Richard Purdie (rpurdie@rpsys.net) - * - replaced "sarlib" with "atmsar" - * - adaptations for inclusion in kernel tree - * - * 0.2.4: - Fixed wrong buffer overrun check in atmsar_decode_rawcell() - * reported by Stephen Robinson - * - Fixed bug when input skb did not contain a multple of 52/53 - * bytes (would happen when the speedtouch device resynced) - * also reported by Stephen Robinson - * - * 0.2.3: - Fixed wrong allocation size. caused memory corruption in some - * cases. Reported by Vladimir Dergachev - * - Added some comments - * - * 0.2.2: - Fixed CRCASM - * patch from Linus Flannagan - * - Fixed problem when user did NOT use the - * ATMSAR_USE_53BYTE_CELL flag. - * reported by Piers Scannell - * - No more in-buffer rewriting for cloned buffers. - * - Removed the PII specific CFLAGS in the Makefile. - * - * 0.2.1: - removed dependency on alloc_tx. tis presented problems when - * using this with the br2684 code. - * - * 0.2: - added AAL0 reassembly - * - added alloc_tx support - * - replaced alloc_skb in decode functions to dev_alloc_skb to - * allow calling from interrupt - * - fixed embarassing AAL5 bug. I was setting the pti bit in the - * wrong byte... - * - fixed another emabrassing bug.. picked up the wrong crc type - * and forgot to invert the crc result... - * - fixed AAL5 length calculations. - * - removed automatic skb freeing from encode functions. - * This caused problems because i did kfree_skb it, while it - * needed to be popped. I cannot determine though whether it - * needs to be popped or not. Figu'e it out ye'self ;-) - * - added mru field. This is the buffersize. atmsar_decode_aal0 - * will use when it allocates a receive buffer. A stop gap for - * real buffer management. - * - * 0.1: - library created. - * - only contains AAL5, AAL0 can be easily added. (actually, only - * AAL0 reassembly is missing) - * - */ - -#include -#include "atmsar.h" - -/*********************** - ** - ** things to remember - ** - ***********************/ - -/* - 1. the atmsar_vcc_data list pointer MUST be initialized to NULL - 2. atmsar_encode_rawcell will drop incomplete cells. - 3. ownership of the skb goes to the library ! -*/ - -#define ATM_HDR_VPVC_MASK (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK) - -/*********************** - ** - ** LOCAL STRUCTURES - ** - ***********************/ - -/*********************** - ** - ** LOCAL MACROS - ** - ***********************/ -/* -#define DEBUG 1 -*/ -#ifdef DEBUG -#define PDEBUG(arg...) printk(KERN_DEBUG "atmsar: " arg) -#else -#define PDEBUG(arg...) -#endif - -#define ADD_HEADER(dest, header) \ - *dest++ = (unsigned char) (header >> 24); \ - *dest++ = (unsigned char) (header >> 16); \ - *dest++ = (unsigned char) (header >> 8); \ - *dest++ = (unsigned char) (header & 0xff); - - -struct atmsar_vcc_data *atmsar_open (struct atmsar_vcc_data **list, struct atm_vcc *vcc, uint type, - ushort vpi, ushort vci, unchar pti, unchar gfc, uint flags) -{ - struct atmsar_vcc_data *new; - - if (!vcc) - return NULL; - - new = kmalloc (sizeof (struct atmsar_vcc_data), GFP_KERNEL); - - if (!new) - return NULL; - - memset (new, 0, sizeof (struct atmsar_vcc_data)); - new->vcc = vcc; - new->stats = vcc->stats; - new->type = type; - new->next = NULL; - new->gfc = gfc; - new->vp = vpi; - new->vc = vci; - new->pti = pti; - - switch (type) { - case ATMSAR_TYPE_AAL0: - new->mtu = ATMSAR_DEF_MTU_AAL0; - break; - case ATMSAR_TYPE_AAL1: - new->mtu = ATMSAR_DEF_MTU_AAL1; - break; - case ATMSAR_TYPE_AAL2: - new->mtu = ATMSAR_DEF_MTU_AAL2; - break; - case ATMSAR_TYPE_AAL34: - /* not supported */ - new->mtu = ATMSAR_DEF_MTU_AAL34; - break; - case ATMSAR_TYPE_AAL5: - new->mtu = ATMSAR_DEF_MTU_AAL5; - break; - } - - new->atmHeader = ((unsigned long) gfc << ATM_HDR_GFC_SHIFT) - | ((unsigned long) vpi << ATM_HDR_VPI_SHIFT) - | ((unsigned long) vci << ATM_HDR_VCI_SHIFT) - | ((unsigned long) pti << ATM_HDR_PTI_SHIFT); - new->flags = flags; - new->next = NULL; - new->reasBuffer = NULL; - - new->next = *list; - *list = new; - - PDEBUG ("Allocated new SARLib vcc 0x%p with vp %d vc %d\n", new, vpi, vci); - - return new; -} - -void atmsar_close (struct atmsar_vcc_data **list, struct atmsar_vcc_data *vcc) -{ - struct atmsar_vcc_data *work; - - if (*list == vcc) { - *list = (*list)->next; - } else { - for (work = *list; work && work->next && (work->next != vcc); work = work->next); - - /* return if not found */ - if (work->next != vcc) - return; - - work->next = work->next->next; - } - - if (vcc->reasBuffer) { - dev_kfree_skb (vcc->reasBuffer); - } - - PDEBUG ("Allocated SARLib vcc 0x%p with vp %d vc %d\n", vcc, vcc->vp, vcc->vc); - - kfree (vcc); -} - - -/*********************** - ** - ** DECODE FUNCTIONS - ** - ***********************/ - -struct sk_buff *atmsar_decode_rawcell (struct atmsar_vcc_data *list, struct sk_buff *skb, - struct atmsar_vcc_data **ctx) -{ - while (skb->len) { - unsigned char *cell = skb->data; - unsigned char *cell_payload; - struct atmsar_vcc_data *vcc = list; - unsigned long atmHeader = - ((unsigned long) (cell[0]) << 24) | ((unsigned long) (cell[1]) << 16) | - ((unsigned long) (cell[2]) << 8) | (cell[3] & 0xff); - - PDEBUG ("atmsar_decode_rawcell (0x%p, 0x%p, 0x%p) called\n", list, skb, ctx); - PDEBUG ("atmsar_decode_rawcell skb->data %p, skb->tail %p\n", skb->data, skb->tail); - - if (!list || !skb || !ctx) - return NULL; - if (!skb->data || !skb->tail) - return NULL; - - /* here should the header CRC check be... */ - - /* look up correct vcc */ - for (; - vcc - && ((vcc->atmHeader & ATM_HDR_VPVC_MASK) != (atmHeader & ATM_HDR_VPVC_MASK)); - vcc = vcc->next); - - PDEBUG ("atmsar_decode_rawcell found vcc %p for packet on vp %d, vc %d\n", vcc, - (int) ((atmHeader & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT), - (int) ((atmHeader & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT)); - - if (vcc && (skb->len >= (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52))) { - cell_payload = cell + (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 5 : 4); - - switch (vcc->type) { - case ATMSAR_TYPE_AAL0: - /* case ATMSAR_TYPE_AAL1: when we have a decode AAL1 function... */ - { - struct sk_buff *tmp = dev_alloc_skb (vcc->mtu); - - if (tmp) { - memcpy (tmp->tail, cell_payload, 48); - skb_put (tmp, 48); - - if (vcc->stats) - atomic_inc (&vcc->stats->rx); - - skb_pull (skb, - (vcc-> - flags & ATMSAR_USE_53BYTE_CELL ? 53 : - 52)); - PDEBUG - ("atmsar_decode_rawcell returns ATMSAR_TYPE_AAL0 pdu 0x%p with length %d\n", - tmp, tmp->len); - return tmp; - }; - } - break; - case ATMSAR_TYPE_AAL1: - case ATMSAR_TYPE_AAL2: - case ATMSAR_TYPE_AAL34: - /* not supported */ - break; - case ATMSAR_TYPE_AAL5: - if (!vcc->reasBuffer) - vcc->reasBuffer = dev_alloc_skb (vcc->mtu); - - /* if alloc fails, we just drop the cell. it is possible that we can still - * receive cells on other vcc's - */ - if (vcc->reasBuffer) { - /* if (buffer overrun) discard received cells until now */ - if ((vcc->reasBuffer->len) > (vcc->mtu - 48)) - skb_trim (vcc->reasBuffer, 0); - - /* copy data */ - memcpy (vcc->reasBuffer->tail, cell_payload, 48); - skb_put (vcc->reasBuffer, 48); - - /* check for end of buffer */ - if (cell[3] & 0x2) { - struct sk_buff *tmp; - - /* the aal5 buffer ends here, cut the buffer. */ - /* buffer will always have at least one whole cell, so */ - /* don't need to check return from skb_pull */ - skb_pull (skb, - (vcc-> - flags & ATMSAR_USE_53BYTE_CELL ? 53 : - 52)); - *ctx = vcc; - tmp = vcc->reasBuffer; - vcc->reasBuffer = NULL; - - PDEBUG - ("atmsar_decode_rawcell returns ATMSAR_TYPE_AAL5 pdu 0x%p with length %d\n", - tmp, tmp->len); - return tmp; - } - } - break; - }; - /* flush the cell */ - /* buffer will always contain at least one whole cell, so don't */ - /* need to check return value from skb_pull */ - skb_pull (skb, (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52)); - } else { - /* If data is corrupt and skb doesn't hold a whole cell, flush the lot */ - if (skb_pull (skb, (list->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52)) == - NULL) - return NULL; - } - } - - return NULL; -}; - -struct sk_buff *atmsar_decode_aal5 (struct atmsar_vcc_data *ctx, struct sk_buff *skb) -{ - uint crc = 0xffffffff; - uint length, pdu_crc, pdu_length; - - PDEBUG ("atmsar_decode_aal5 (0x%p, 0x%p) called\n", ctx, skb); - - if (skb->len && (skb->len % 48)) - return NULL; - - length = (skb->tail[-6] << 8) + skb->tail[-5]; - pdu_crc = - (skb->tail[-4] << 24) + (skb->tail[-3] << 16) + (skb->tail[-2] << 8) + skb->tail[-1]; - pdu_length = ((length + 47 + 8) / 48) * 48; - - PDEBUG ("atmsar_decode_aal5: skb->len = %d, length = %d, pdu_crc = 0x%x, pdu_length = %d\n", - skb->len, length, pdu_crc, pdu_length); - - /* is skb long enough ? */ - if (skb->len < pdu_length) { - if (ctx->stats) - atomic_inc (&ctx->stats->rx_err); - return NULL; - } - - /* is skb too long ? */ - if (skb->len > pdu_length) { - PDEBUG ("atmsar_decode_aal5: Warning: readjusting illeagl size %d -> %d\n", - skb->len, pdu_length); - /* buffer is too long. we can try to recover - * if we discard the first part of the skb. - * the crc will decide whether this was ok - */ - skb_pull (skb, skb->len - pdu_length); - } - - crc = ~crc32_be (crc, skb->data, pdu_length - 4); - - /* check crc */ - if (pdu_crc != crc) { - PDEBUG ("atmsar_decode_aal5: crc check failed!\n"); - if (ctx->stats) - atomic_inc (&ctx->stats->rx_err); - return NULL; - } - - /* pdu is ok */ - skb_trim (skb, length); - - /* update stats */ - if (ctx->stats) - atomic_inc (&ctx->stats->rx); - - PDEBUG ("atmsar_decode_aal5 returns pdu 0x%p with length %d\n", skb, skb->len); - return skb; -}; diff -Nru a/drivers/usb/misc/atmsar.h b/drivers/usb/misc/atmsar.h --- a/drivers/usb/misc/atmsar.h Thu Mar 20 15:04:07 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,87 +0,0 @@ -#ifndef _ATMSAR_H_ -#define _ATMSAR_H_ - -/****************************************************************************** - * atmsar.h -- General SAR library for ATM devices. - * - * Copyright (C) 2000, Johan Verrept - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - ******************************************************************************/ - -#include -#include -#include -#include -#include -#include -#include - -#define ATMSAR_USE_53BYTE_CELL 0x1L -#define ATMSAR_SET_PTI 0x2L - -#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD) - -/* types */ -#define ATMSAR_TYPE_AAL0 ATM_AAL0 -#define ATMSAR_TYPE_AAL1 ATM_AAL1 -#define ATMSAR_TYPE_AAL2 ATM_AAL2 -#define ATMSAR_TYPE_AAL34 ATM_AAL34 -#define ATMSAR_TYPE_AAL5 ATM_AAL5 - - -/* default MTU's */ -#define ATMSAR_DEF_MTU_AAL0 48 -#define ATMSAR_DEF_MTU_AAL1 47 -#define ATMSAR_DEF_MTU_AAL2 0 /* not supported */ -#define ATMSAR_DEF_MTU_AAL34 0 /* not supported */ -#define ATMSAR_DEF_MTU_AAL5 65535 /* max mtu .. */ - -struct atmsar_vcc_data { - struct atmsar_vcc_data *next; - - /* general atmsar flags, per connection */ - int flags; - int type; - - /* connection specific non-atmsar data */ - struct atm_vcc *vcc; - struct k_atm_aal_stats *stats; - unsigned short mtu; /* max is actually 65k for AAL5... */ - - /* cell data */ - unsigned int vp; - unsigned int vc; - unsigned char gfc; - unsigned char pti; - unsigned int headerFlags; - unsigned long atmHeader; - - /* raw cell reassembly */ - struct sk_buff *reasBuffer; -}; - - -extern struct atmsar_vcc_data *atmsar_open (struct atmsar_vcc_data **list, struct atm_vcc *vcc, - uint type, ushort vpi, ushort vci, unchar pti, - unchar gfc, uint flags); -extern void atmsar_close (struct atmsar_vcc_data **list, struct atmsar_vcc_data *vcc); - -struct sk_buff *atmsar_decode_rawcell (struct atmsar_vcc_data *list, struct sk_buff *skb, - struct atmsar_vcc_data **ctx); -struct sk_buff *atmsar_decode_aal5 (struct atmsar_vcc_data *ctx, struct sk_buff *skb); - -#endif /* _ATMSAR_H_ */ diff -Nru a/drivers/usb/misc/speedtch.c b/drivers/usb/misc/speedtch.c --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/usb/misc/speedtch.c Thu Mar 20 15:04:07 2003 @@ -0,0 +1,1514 @@ +/****************************************************************************** + * speedtouch.c -- Alcatel SpeedTouch USB xDSL modem driver. + * + * Copyright (C) 2001, Alcatel + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + ******************************************************************************/ + +/* + * Written by Johan Verrept (Johan.Verrept@advalvas.be) + * + * 1.5A: - Version for inclusion in 2.5 series kernel + * - Modifications by Richard Purdie (rpurdie@rpsys.net) + * - made compatible with kernel 2.5.6 onwards by changing + * udsl_usb_send_data_context->urb to a pointer and adding code + * to alloc and free it + * - remove_wait_queue() added to udsl_atm_processqueue_thread() + * + * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL. + * (reported by stephen.robinson@zen.co.uk) + * + * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave() + * - unlink all active send urbs of a vcc that is being closed. + * + * 1.3.1: - added the version number + * + * 1.3: - Added multiple send urb support + * - fixed memory leak and vcc->tx_inuse starvation bug + * when not enough memory left in vcc. + * + * 1.2: - Fixed race condition in udsl_usb_send_data() + * 1.1: - Turned off packet debugging + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* +#define DEBUG 1 +#define DEBUG_PACKET 1 +*/ + +#include + + +#ifdef DEBUG_PACKET +static int udsl_print_packet (const unsigned char *data, int len); +#define PACKETDEBUG(arg...) udsl_print_packet (arg) +#else +#define PACKETDEBUG(arg...) +#endif + +#define DRIVER_AUTHOR "Johan Verrept, Johan.Verrept@advalvas.be" +#define DRIVER_DESC "Driver for the Alcatel SpeedTouch USB ADSL modem" +#define DRIVER_VERSION "1.5A" + +#define SPEEDTOUCH_VENDORID 0x06b9 +#define SPEEDTOUCH_PRODUCTID 0x4061 + +#define UDSL_NUMBER_RCV_URBS 1 +#define UDSL_NUMBER_SND_URBS 1 +#define UDSL_NUMBER_SND_BUFS (2*UDSL_NUMBER_SND_URBS) +#define UDSL_RCV_BUFFER_SIZE (1*64) /* ATM cells */ +#define UDSL_SND_BUFFER_SIZE (1*64) /* ATM cells */ +/* max should be (1500 IP mtu + 2 ppp bytes + 32 * 5 cellheader overhead) for + * PPPoA and (1500 + 14 + 32*5 cellheader overhead) for PPPoE */ +#define UDSL_MAX_AAL5_MRU 2048 + +#define UDSL_IOCTL_START 1 +#define UDSL_IOCTL_STOP 2 + +/* endpoint declarations */ + +#define UDSL_ENDPOINT_DATA_OUT 0x07 +#define UDSL_ENDPOINT_DATA_IN 0x87 + +#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD) + +#define hex2int(c) ( (c >= '0')&&(c <= '9') ? (c - '0') : ((c & 0xf)+9) ) + +/* usb_device_id struct */ + +static struct usb_device_id udsl_usb_ids [] = { + { USB_DEVICE (SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID) }, + { } /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE (usb, udsl_usb_ids); + +/* context declarations */ + +struct udsl_receiver { + struct list_head list; + struct sk_buff *skb; + struct urb *urb; + struct udsl_instance_data *instance; +}; + +struct udsl_send_buffer { + struct list_head list; + unsigned char *base; + unsigned char *free_start; + unsigned int free_cells; +}; + +struct udsl_sender { + struct list_head list; + struct udsl_send_buffer *buffer; + struct urb *urb; + struct udsl_instance_data *instance; +}; + +struct udsl_control { + struct atm_skb_data atm_data; + unsigned int num_cells; + unsigned int num_entire; + unsigned char cell_header [ATM_CELL_HEADER]; + unsigned int pdu_padding; + unsigned char aal5_trailer [ATM_AAL5_TRAILER]; +}; + +#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb) + +struct atmsar_vcc_data { + struct atmsar_vcc_data *next; + + /* general atmsar flags, per connection */ + int flags; + int type; + + /* connection specific non-atmsar data */ + struct atm_vcc *vcc; + struct k_atm_aal_stats *stats; + unsigned short mtu; /* max is actually 65k for AAL5... */ + + /* cell data */ + unsigned int vp; + unsigned int vc; + unsigned char gfc; + unsigned char pti; + unsigned int headerFlags; + unsigned long atmHeader; + + /* raw cell reassembly */ + struct sk_buff *reasBuffer; +}; + +/* + * UDSL main driver data + */ + +struct udsl_instance_data { + struct semaphore serialize; + + /* usb device part */ + struct usb_device *usb_dev; + char description [64]; + int firmware_loaded; + + /* atm device part */ + struct atm_dev *atm_dev; + struct atmsar_vcc_data *atmsar_vcc_list; + + /* receiving */ + struct udsl_receiver all_receivers [UDSL_NUMBER_RCV_URBS]; + + spinlock_t spare_receivers_lock; + struct list_head spare_receivers; + + spinlock_t completed_receivers_lock; + struct list_head completed_receivers; + + struct tasklet_struct receive_tasklet; + + /* sending */ + struct udsl_sender all_senders [UDSL_NUMBER_SND_URBS]; + struct udsl_send_buffer all_buffers [UDSL_NUMBER_SND_BUFS]; + + struct sk_buff_head sndqueue; + + spinlock_t send_lock; + struct list_head spare_senders; + struct list_head spare_buffers; + + struct tasklet_struct send_tasklet; + struct sk_buff *current_skb; /* being emptied */ + struct udsl_send_buffer *current_buffer; /* being filled */ + struct list_head filled_buffers; +}; + +static const char udsl_driver_name [] = "speedtch"; + +/* + * atm driver prototypes and structures + */ + +static void udsl_atm_dev_close (struct atm_dev *dev); +static int udsl_atm_open (struct atm_vcc *vcc, short vpi, int vci); +static void udsl_atm_close (struct atm_vcc *vcc); +static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg); +static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb); +static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page); + +static struct atmdev_ops udsl_atm_devops = { + .dev_close = udsl_atm_dev_close, + .open = udsl_atm_open, + .close = udsl_atm_close, + .ioctl = udsl_atm_ioctl, + .send = udsl_atm_send, + .proc_read = udsl_atm_proc_read, +}; + +/* + * usb driver prototypes and structures + */ +static int udsl_usb_probe (struct usb_interface *intf, + const struct usb_device_id *id); +static void udsl_usb_disconnect (struct usb_interface *intf); +static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data); + +static struct usb_driver udsl_usb_driver = { + .name = udsl_driver_name, + .probe = udsl_usb_probe, + .disconnect = udsl_usb_disconnect, + .ioctl = udsl_usb_ioctl, + .id_table = udsl_usb_ids, +}; + + +/************* +** decode ** +*************/ + +#define ATM_HDR_VPVC_MASK (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK) +#define ATMSAR_USE_53BYTE_CELL 0x1L + +struct sk_buff *atmsar_decode_rawcell (struct atmsar_vcc_data *list, struct sk_buff *skb, + struct atmsar_vcc_data **ctx) +{ + while (skb->len) { + unsigned char *cell = skb->data; + unsigned char *cell_payload; + struct atmsar_vcc_data *vcc = list; + unsigned long atmHeader = + ((unsigned long) (cell[0]) << 24) | ((unsigned long) (cell[1]) << 16) | + ((unsigned long) (cell[2]) << 8) | (cell[3] & 0xff); + + dbg ("atmsar_decode_rawcell (0x%p, 0x%p, 0x%p) called", list, skb, ctx); + dbg ("atmsar_decode_rawcell skb->data %p, skb->tail %p", skb->data, skb->tail); + + if (!list || !skb || !ctx) + return NULL; + if (!skb->data || !skb->tail) + return NULL; + + /* here should the header CRC check be... */ + + /* look up correct vcc */ + for (; + vcc + && ((vcc->atmHeader & ATM_HDR_VPVC_MASK) != (atmHeader & ATM_HDR_VPVC_MASK)); + vcc = vcc->next); + + dbg ("atmsar_decode_rawcell found vcc %p for packet on vp %d, vc %d", vcc, + (int) ((atmHeader & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT), + (int) ((atmHeader & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT)); + + if (vcc && (skb->len >= (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52))) { + cell_payload = cell + (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 5 : 4); + + switch (vcc->type) { + case ATM_AAL0: + /* case ATM_AAL1: when we have a decode AAL1 function... */ + { + struct sk_buff *tmp = dev_alloc_skb (vcc->mtu); + + if (tmp) { + memcpy (tmp->tail, cell_payload, 48); + skb_put (tmp, 48); + + if (vcc->stats) + atomic_inc (&vcc->stats->rx); + + skb_pull (skb, + (vcc-> + flags & ATMSAR_USE_53BYTE_CELL ? 53 : + 52)); + dbg + ("atmsar_decode_rawcell returns ATM_AAL0 pdu 0x%p with length %d", + tmp, tmp->len); + return tmp; + }; + } + break; + case ATM_AAL1: + case ATM_AAL2: + case ATM_AAL34: + /* not supported */ + break; + case ATM_AAL5: + if (!vcc->reasBuffer) + vcc->reasBuffer = dev_alloc_skb (vcc->mtu); + + /* if alloc fails, we just drop the cell. it is possible that we can still + * receive cells on other vcc's + */ + if (vcc->reasBuffer) { + /* if (buffer overrun) discard received cells until now */ + if ((vcc->reasBuffer->len) > (vcc->mtu - 48)) + skb_trim (vcc->reasBuffer, 0); + + /* copy data */ + memcpy (vcc->reasBuffer->tail, cell_payload, 48); + skb_put (vcc->reasBuffer, 48); + + /* check for end of buffer */ + if (cell[3] & 0x2) { + struct sk_buff *tmp; + + /* the aal5 buffer ends here, cut the buffer. */ + /* buffer will always have at least one whole cell, so */ + /* don't need to check return from skb_pull */ + skb_pull (skb, + (vcc-> + flags & ATMSAR_USE_53BYTE_CELL ? 53 : + 52)); + *ctx = vcc; + tmp = vcc->reasBuffer; + vcc->reasBuffer = NULL; + + dbg + ("atmsar_decode_rawcell returns ATM_AAL5 pdu 0x%p with length %d", + tmp, tmp->len); + return tmp; + } + } + break; + }; + /* flush the cell */ + /* buffer will always contain at least one whole cell, so don't */ + /* need to check return value from skb_pull */ + skb_pull (skb, (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52)); + } else { + /* If data is corrupt and skb doesn't hold a whole cell, flush the lot */ + if (skb_pull (skb, (list->flags & ATMSAR_USE_53BYTE_CELL ? 53 : 52)) == + NULL) + return NULL; + } + } + + return NULL; +}; + +struct sk_buff *atmsar_decode_aal5 (struct atmsar_vcc_data *ctx, struct sk_buff *skb) +{ + uint crc = 0xffffffff; + uint length, pdu_crc, pdu_length; + + dbg ("atmsar_decode_aal5 (0x%p, 0x%p) called", ctx, skb); + + if (skb->len && (skb->len % 48)) + return NULL; + + length = (skb->tail[-6] << 8) + skb->tail[-5]; + pdu_crc = + (skb->tail[-4] << 24) + (skb->tail[-3] << 16) + (skb->tail[-2] << 8) + skb->tail[-1]; + pdu_length = ((length + 47 + 8) / 48) * 48; + + dbg ("atmsar_decode_aal5: skb->len = %d, length = %d, pdu_crc = 0x%x, pdu_length = %d", + skb->len, length, pdu_crc, pdu_length); + + /* is skb long enough ? */ + if (skb->len < pdu_length) { + if (ctx->stats) + atomic_inc (&ctx->stats->rx_err); + return NULL; + } + + /* is skb too long ? */ + if (skb->len > pdu_length) { + dbg ("atmsar_decode_aal5: Warning: readjusting illeagl size %d -> %d", + skb->len, pdu_length); + /* buffer is too long. we can try to recover + * if we discard the first part of the skb. + * the crc will decide whether this was ok + */ + skb_pull (skb, skb->len - pdu_length); + } + + crc = ~crc32_be (crc, skb->data, pdu_length - 4); + + /* check crc */ + if (pdu_crc != crc) { + dbg ("atmsar_decode_aal5: crc check failed!"); + if (ctx->stats) + atomic_inc (&ctx->stats->rx_err); + return NULL; + } + + /* pdu is ok */ + skb_trim (skb, length); + + /* update stats */ + if (ctx->stats) + atomic_inc (&ctx->stats->rx); + + dbg ("atmsar_decode_aal5 returns pdu 0x%p with length %d", skb, skb->len); + return skb; +}; + + +/************* +** encode ** +*************/ + +static void udsl_groom_skb (struct atm_vcc *vcc, struct sk_buff *skb) { + struct udsl_control *ctrl = UDSL_SKB (skb); + unsigned int i, zero_padding; + unsigned char zero = 0; + u32 crc; + + ctrl->atm_data.vcc = vcc; + ctrl->cell_header [0] = vcc->vpi >> 4; + ctrl->cell_header [1] = (vcc->vpi << 4) | (vcc->vci >> 12); + ctrl->cell_header [2] = vcc->vci >> 4; + ctrl->cell_header [3] = vcc->vci << 4; + ctrl->cell_header [4] = 0xec; + + ctrl->num_cells = (skb->len + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD; + ctrl->num_entire = skb->len / ATM_CELL_PAYLOAD; + + zero_padding = ctrl->num_cells * ATM_CELL_PAYLOAD - skb->len - ATM_AAL5_TRAILER; + + if (ctrl->num_entire + 1 < ctrl->num_cells) + ctrl->pdu_padding = zero_padding - (ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER); + else + ctrl->pdu_padding = zero_padding; + + ctrl->aal5_trailer [0] = 0; /* UU = 0 */ + ctrl->aal5_trailer [1] = 0; /* CPI = 0 */ + ctrl->aal5_trailer [2] = skb->len >> 8; + ctrl->aal5_trailer [3] = skb->len; + + crc = crc32_be (~0, skb->data, skb->len); + for (i = 0; i < zero_padding; i++) + crc = crc32_be (crc, &zero, 1); + crc = crc32_be (crc, ctrl->aal5_trailer, 4); + crc = ~crc; + + ctrl->aal5_trailer [4] = crc >> 24; + ctrl->aal5_trailer [5] = crc >> 16; + ctrl->aal5_trailer [6] = crc >> 8; + ctrl->aal5_trailer [7] = crc; +} + +unsigned int udsl_write_cells (unsigned int howmany, struct sk_buff *skb, unsigned char **target_p) { + struct udsl_control *ctrl = UDSL_SKB (skb); + unsigned char *target = *target_p; + unsigned int nc, ne, i; + + dbg ("udsl_write_cells: howmany=%u, skb->len=%d, num_cells=%u, num_entire=%u, pdu_padding=%u", howmany, skb->len, ctrl->num_cells, ctrl->num_entire, ctrl->pdu_padding); + + nc = ctrl->num_cells; + ne = min (howmany, ctrl->num_entire); + + for (i = 0; i < ne; i++) { + memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); + target += ATM_CELL_HEADER; + memcpy (target, skb->data, ATM_CELL_PAYLOAD); + target += ATM_CELL_PAYLOAD; + __skb_pull (skb, ATM_CELL_PAYLOAD); + } + + ctrl->num_entire -= ne; + + if (!(ctrl->num_cells -= ne) || !(howmany -= ne)) + goto out; + + memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); + target += ATM_CELL_HEADER; + memcpy (target, skb->data, skb->len); + target += skb->len; + __skb_pull (skb, skb->len); + memset (target, 0, ctrl->pdu_padding); + target += ctrl->pdu_padding; + + if (--ctrl->num_cells) { + if (!--howmany) { + ctrl->pdu_padding = ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER; + goto out; + } + + memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); + target += ATM_CELL_HEADER; + memset (target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER); + target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER; + + if (--ctrl->num_cells) + BUG(); + } + + memcpy (target, ctrl->aal5_trailer, ATM_AAL5_TRAILER); + target += ATM_AAL5_TRAILER; + /* set pti bit in last cell */ + *(target + 3 - ATM_CELL_SIZE) |= 0x2; + +out: + *target_p = target; + return nc - ctrl->num_cells; +} + + +/************** +** receive ** +**************/ + +static void udsl_complete_receive (struct urb *urb, struct pt_regs *regs) +{ + struct udsl_instance_data *instance; + struct udsl_receiver *rcv; + unsigned long flags; + + if (!urb || !(rcv = urb->context) || !(instance = rcv->instance)) { + dbg ("udsl_complete_receive: bad urb!"); + return; + } + + dbg ("udsl_complete_receive entered (urb 0x%p, status %d)", urb, urb->status); + + /* may not be in_interrupt() */ + spin_lock_irqsave (&instance->completed_receivers_lock, flags); + list_add_tail (&rcv->list, &instance->completed_receivers); + tasklet_schedule (&instance->receive_tasklet); + spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); +} + +static void udsl_process_receive (unsigned long data) +{ + struct udsl_instance_data *instance = (struct udsl_instance_data *) data; + struct udsl_receiver *rcv; + unsigned long flags; + unsigned char *data_start; + struct sk_buff *skb; + struct urb *urb; + struct atmsar_vcc_data *atmsar_vcc = NULL; + struct sk_buff *new = NULL, *tmp = NULL; + int err; + + dbg ("udsl_process_receive entered"); + + spin_lock_irqsave (&instance->completed_receivers_lock, flags); + while (!list_empty (&instance->completed_receivers)) { + rcv = list_entry (instance->completed_receivers.next, struct udsl_receiver, list); + list_del (&rcv->list); + spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); + + urb = rcv->urb; + dbg ("udsl_process_receive: got packet %p with length %d and status %d", urb, urb->actual_length, urb->status); + + switch (urb->status) { + case 0: + dbg ("udsl_process_receive: processing urb with rcv %p, urb %p, skb %p", rcv, urb, rcv->skb); + + /* update the skb structure */ + skb = rcv->skb; + skb_trim (skb, 0); + skb_put (skb, urb->actual_length); + data_start = skb->data; + + dbg ("skb->len = %d", skb->len); + PACKETDEBUG (skb->data, skb->len); + + while ((new = + atmsar_decode_rawcell (instance->atmsar_vcc_list, skb, + &atmsar_vcc)) != NULL) { + dbg ("(after cell processing)skb->len = %d", new->len); + + switch (atmsar_vcc->type) { + case ATM_AAL5: + tmp = new; + new = atmsar_decode_aal5 (atmsar_vcc, new); + + /* we can't send NULL skbs upstream, the ATM layer would try to close the vcc... */ + if (new) { + dbg ("(after aal5 decap) skb->len = %d", new->len); + if (new->len && atm_charge (atmsar_vcc->vcc, new->truesize)) { + PACKETDEBUG (new->data, new->len); + atmsar_vcc->vcc->push (atmsar_vcc->vcc, new); + } else { + dbg + ("dropping incoming packet : rx_inuse = %d, vcc->sk->rcvbuf = %d, skb->true_size = %d", + atomic_read (&atmsar_vcc->vcc->rx_inuse), + atmsar_vcc->vcc->sk->rcvbuf, new->truesize); + dev_kfree_skb (new); + } + } else { + dbg ("atmsar_decode_aal5 returned NULL!"); + dev_kfree_skb (tmp); + } + break; + default: + /* not supported. we delete the skb. */ + printk (KERN_INFO + "SpeedTouch USB: illegal vcc type. Dropping packet.\n"); + dev_kfree_skb (new); + break; + } + } + + /* restore skb */ + skb_push (skb, skb->data - data_start); + + usb_fill_bulk_urb (urb, + instance->usb_dev, + usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), + (unsigned char *) rcv->skb->data, + UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE, + udsl_complete_receive, + rcv); + if (!(err = usb_submit_urb (urb, GFP_ATOMIC))) + break; + dbg ("udsl_process_receive: submission failed (%d)", err); + /* fall through */ + default: /* error or urb unlinked */ + dbg ("udsl_process_receive: adding to spare_receivers"); + spin_lock_irqsave (&instance->spare_receivers_lock, flags); + list_add (&rcv->list, &instance->spare_receivers); + spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); + break; + } /* switch */ + + spin_lock_irqsave (&instance->completed_receivers_lock, flags); + } /* while */ + spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); + dbg ("udsl_process_receive successful"); +} + +static void udsl_fire_receivers (struct udsl_instance_data *instance) +{ + struct list_head receivers, *pos, *n; + unsigned long flags; + + INIT_LIST_HEAD (&receivers); + + down (&instance->serialize); + + spin_lock_irqsave (&instance->spare_receivers_lock, flags); + list_splice_init (&instance->spare_receivers, &receivers); + spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); + + list_for_each_safe (pos, n, &receivers) { + struct udsl_receiver *rcv = list_entry (pos, struct udsl_receiver, list); + + dbg ("udsl_fire_receivers: firing urb %p", rcv->urb); + + usb_fill_bulk_urb (rcv->urb, + instance->usb_dev, + usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), + (unsigned char *) rcv->skb->data, + UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE, + udsl_complete_receive, + rcv); + + if (usb_submit_urb (rcv->urb, GFP_KERNEL) < 0) { + dbg ("udsl_fire_receivers: submit failed!"); + spin_lock_irqsave (&instance->spare_receivers_lock, flags); + list_move (pos, &instance->spare_receivers); + spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); + } + } + + up (&instance->serialize); +} + + +/*********** +** send ** +***********/ + +static void udsl_complete_send (struct urb *urb, struct pt_regs *regs) +{ + struct udsl_instance_data *instance; + struct udsl_sender *snd; + unsigned long flags; + + if (!urb || !(snd = urb->context) || !(instance = snd->instance)) { + dbg ("udsl_complete_send: bad urb!"); + return; + } + + dbg ("udsl_complete_send entered (urb 0x%p, status %d)", urb, urb->status); + + /* may not be in_interrupt() */ + spin_lock_irqsave (&instance->send_lock, flags); + list_add (&snd->list, &instance->spare_senders); + list_add (&snd->buffer->list, &instance->spare_buffers); + tasklet_schedule (&instance->send_tasklet); + spin_unlock_irqrestore (&instance->send_lock, flags); +} + +static void udsl_process_send (unsigned long data) +{ + struct udsl_send_buffer *buf; + int err; + unsigned long flags; + struct udsl_instance_data *instance = (struct udsl_instance_data *) data; + unsigned int num_written; + struct sk_buff *skb; + struct udsl_sender *snd; + + dbg ("udsl_process_send entered"); + +made_progress: + spin_lock_irqsave (&instance->send_lock, flags); + while (!list_empty (&instance->spare_senders)) { + if (!list_empty (&instance->filled_buffers)) { + buf = list_entry (instance->filled_buffers.next, struct udsl_send_buffer, list); + list_del (&buf->list); + dbg ("sending filled buffer (0x%p)", buf); + } else if ((buf = instance->current_buffer)) { + instance->current_buffer = NULL; + dbg ("sending current buffer (0x%p)", buf); + } else /* all buffers empty */ + break; + + snd = list_entry (instance->spare_senders.next, struct udsl_sender, list); + list_del (&snd->list); + spin_unlock_irqrestore (&instance->send_lock, flags); + + snd->buffer = buf; + usb_fill_bulk_urb (snd->urb, + instance->usb_dev, + usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT), + buf->base, + (UDSL_SND_BUFFER_SIZE - buf->free_cells) * ATM_CELL_SIZE, + udsl_complete_send, + snd); + + dbg ("submitting urb 0x%p, contains %d cells", snd->urb, UDSL_SND_BUFFER_SIZE - buf->free_cells); + + if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) { + dbg ("submission failed (%d)!", err); + spin_lock_irqsave (&instance->send_lock, flags); + list_add (&snd->list, &instance->spare_senders); + spin_unlock_irqrestore (&instance->send_lock, flags); + list_add (&buf->list, &instance->filled_buffers); + return; + } + + spin_lock_irqsave (&instance->send_lock, flags); + } /* while */ + spin_unlock_irqrestore (&instance->send_lock, flags); + + if (!instance->current_skb && !(instance->current_skb = skb_dequeue (&instance->sndqueue))) { + dbg ("done - no more skbs"); + return; + } + + skb = instance->current_skb; + + if (!(buf = instance->current_buffer)) { + spin_lock_irqsave (&instance->send_lock, flags); + if (list_empty (&instance->spare_buffers)) { + instance->current_buffer = NULL; + spin_unlock_irqrestore (&instance->send_lock, flags); + dbg ("done - no more buffers"); + return; + } + buf = list_entry (instance->spare_buffers.next, struct udsl_send_buffer, list); + list_del (&buf->list); + spin_unlock_irqrestore (&instance->send_lock, flags); + + buf->free_start = buf->base; + buf->free_cells = UDSL_SND_BUFFER_SIZE; + + instance->current_buffer = buf; + } + + num_written = udsl_write_cells (buf->free_cells, skb, &buf->free_start); + + dbg ("wrote %u cells from skb 0x%p to buffer 0x%p", num_written, skb, buf); + + if (!(buf->free_cells -= num_written)) { + list_add_tail (&buf->list, &instance->filled_buffers); + instance->current_buffer = NULL; + dbg ("queued filled buffer"); + } + + dbg ("buffer contains %d cells, %d left", UDSL_SND_BUFFER_SIZE - buf->free_cells, buf->free_cells); + + if (!UDSL_SKB (skb)->num_cells) { + struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc; + + dbg ("discarding empty skb"); + if (vcc->pop) + vcc->pop (vcc, skb); + else + kfree_skb (skb); + instance->current_skb = NULL; + + if (vcc->stats) + atomic_inc (&vcc->stats->tx); + } + + goto made_progress; +} + +static void udsl_cancel_send (struct udsl_instance_data *instance, struct atm_vcc *vcc) +{ + unsigned long flags; + struct sk_buff *skb, *n; + + dbg ("udsl_cancel_send entered"); + spin_lock_irqsave (&instance->sndqueue.lock, flags); + for (skb = instance->sndqueue.next, n = skb->next; skb != (struct sk_buff *)&instance->sndqueue; skb = n, n = skb->next) + if (UDSL_SKB (skb)->atm_data.vcc == vcc) { + dbg ("popping skb 0x%p", skb); + __skb_unlink (skb, &instance->sndqueue); + if (vcc->pop) + vcc->pop (vcc, skb); + else + kfree_skb (skb); + } + spin_unlock_irqrestore (&instance->sndqueue.lock, flags); + + tasklet_disable (&instance->send_tasklet); + if ((skb = instance->current_skb) && (UDSL_SKB (skb)->atm_data.vcc == vcc)) { + dbg ("popping current skb (0x%p)", skb); + instance->current_skb = NULL; + if (vcc->pop) + vcc->pop (vcc, skb); + else + kfree_skb (skb); + } + tasklet_enable (&instance->send_tasklet); + dbg ("udsl_cancel_send done"); +} + +static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct udsl_instance_data *instance = vcc->dev->dev_data; + + dbg ("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len); + + if (!instance || !instance->usb_dev) { + dbg ("NULL data!"); + return -ENODEV; + } + + if (!instance->firmware_loaded) + return -EAGAIN; + + if (vcc->qos.aal != ATM_AAL5) { + dbg ("unsupported ATM type %d!", vcc->qos.aal); + return -EINVAL; + } + + if (skb->len > ATM_MAX_AAL5_PDU) { + dbg ("packet too long (%d vs %d)!", skb->len, ATM_MAX_AAL5_PDU); + return -EINVAL; + } + + PACKETDEBUG (skb->data, skb->len); + + udsl_groom_skb (vcc, skb); + skb_queue_tail (&instance->sndqueue, skb); + tasklet_schedule (&instance->send_tasklet); + + return 0; +} + + +/********** +** ATM ** +**********/ + +#define ATMSAR_DEF_MTU_AAL0 48 +#define ATMSAR_DEF_MTU_AAL1 47 +#define ATMSAR_DEF_MTU_AAL2 0 /* not supported */ +#define ATMSAR_DEF_MTU_AAL34 0 /* not supported */ +#define ATMSAR_DEF_MTU_AAL5 65535 /* max mtu .. */ + +struct atmsar_vcc_data *atmsar_open (struct atmsar_vcc_data **list, struct atm_vcc *vcc, uint type, + ushort vpi, ushort vci, unchar pti, unchar gfc, uint flags) +{ + struct atmsar_vcc_data *new; + + if (!vcc) + return NULL; + + new = kmalloc (sizeof (struct atmsar_vcc_data), GFP_KERNEL); + + if (!new) + return NULL; + + memset (new, 0, sizeof (struct atmsar_vcc_data)); + new->vcc = vcc; + new->stats = vcc->stats; + new->type = type; + new->next = NULL; + new->gfc = gfc; + new->vp = vpi; + new->vc = vci; + new->pti = pti; + + switch (type) { + case ATM_AAL0: + new->mtu = ATMSAR_DEF_MTU_AAL0; + break; + case ATM_AAL1: + new->mtu = ATMSAR_DEF_MTU_AAL1; + break; + case ATM_AAL2: + new->mtu = ATMSAR_DEF_MTU_AAL2; + break; + case ATM_AAL34: + /* not supported */ + new->mtu = ATMSAR_DEF_MTU_AAL34; + break; + case ATM_AAL5: + new->mtu = ATMSAR_DEF_MTU_AAL5; + break; + } + + new->atmHeader = ((unsigned long) gfc << ATM_HDR_GFC_SHIFT) + | ((unsigned long) vpi << ATM_HDR_VPI_SHIFT) + | ((unsigned long) vci << ATM_HDR_VCI_SHIFT) + | ((unsigned long) pti << ATM_HDR_PTI_SHIFT); + new->flags = flags; + new->next = NULL; + new->reasBuffer = NULL; + + new->next = *list; + *list = new; + + dbg ("Allocated new SARLib vcc 0x%p with vp %d vc %d", new, vpi, vci); + + return new; +} + +void atmsar_close (struct atmsar_vcc_data **list, struct atmsar_vcc_data *vcc) +{ + struct atmsar_vcc_data *work; + + if (*list == vcc) { + *list = (*list)->next; + } else { + for (work = *list; work && work->next && (work->next != vcc); work = work->next); + + /* return if not found */ + if (work->next != vcc) + return; + + work->next = work->next->next; + } + + if (vcc->reasBuffer) { + dev_kfree_skb (vcc->reasBuffer); + } + + dbg ("Allocated SARLib vcc 0x%p with vp %d vc %d", vcc, vcc->vp, vcc->vc); + + kfree (vcc); +} + +static void udsl_atm_dev_close (struct atm_dev *dev) +{ + struct udsl_instance_data *instance = dev->dev_data; + + if (!instance) { + dbg ("udsl_atm_dev_close: NULL instance!"); + return; + } + + dbg ("udsl_atm_dev_close: queue has %u elements", instance->sndqueue.qlen); + + dbg ("udsl_atm_dev_close: killing tasklet"); + tasklet_kill (&instance->send_tasklet); + dbg ("udsl_atm_dev_close: freeing instance"); + kfree (instance); + dev->dev_data = NULL; +} + +static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page) +{ + struct udsl_instance_data *instance = atm_dev->dev_data; + int left = *pos; + + if (!instance) { + dbg ("NULL instance!"); + return -ENODEV; + } + + if (!left--) + return sprintf (page, "%s\n", instance->description); + + if (!left--) + return sprintf (page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", + atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2], + atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]); + + if (!left--) + return sprintf (page, "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n", + atomic_read (&atm_dev->stats.aal5.tx), + atomic_read (&atm_dev->stats.aal5.tx_err), + atomic_read (&atm_dev->stats.aal5.rx), + atomic_read (&atm_dev->stats.aal5.rx_err), + atomic_read (&atm_dev->stats.aal5.rx_drop)); + + if (!left--) { + switch (atm_dev->signal) { + case ATM_PHY_SIG_FOUND: + sprintf (page, "Line up"); + break; + case ATM_PHY_SIG_LOST: + sprintf (page, "Line down"); + break; + default: + sprintf (page, "Line state unknown"); + break; + } + + if (instance->usb_dev) { + if (!instance->firmware_loaded) + strcat (page, ", no firmware\n"); + else + strcat (page, ", firmware loaded\n"); + } else + strcat (page, ", disconnected\n"); + + return strlen (page); + } + + return 0; +} + +#define ATMSAR_SET_PTI 0x2L + +static int udsl_atm_open (struct atm_vcc *vcc, short vpi, int vci) +{ + struct udsl_instance_data *instance = vcc->dev->dev_data; + + dbg ("udsl_atm_open called"); + + if (!instance || !instance->usb_dev) { + dbg ("NULL data!"); + return -ENODEV; + } + + /* at the moment only AAL5 support */ + if (vcc->qos.aal != ATM_AAL5) + return -EINVAL; + + MOD_INC_USE_COUNT; + + vcc->dev_data = + atmsar_open (&(instance->atmsar_vcc_list), vcc, ATM_AAL5, vpi, vci, 0, 0, + ATMSAR_USE_53BYTE_CELL | ATMSAR_SET_PTI); + if (!vcc->dev_data) { + MOD_DEC_USE_COUNT; + return -ENOMEM; /* this is the only reason atmsar_open can fail... */ + } + + vcc->vpi = vpi; + vcc->vci = vci; + set_bit (ATM_VF_ADDR, &vcc->flags); + set_bit (ATM_VF_PARTIAL, &vcc->flags); + set_bit (ATM_VF_READY, &vcc->flags); + + ((struct atmsar_vcc_data *)vcc->dev_data)->mtu = UDSL_MAX_AAL5_MRU; + + if (instance->firmware_loaded) + udsl_fire_receivers (instance); + + dbg ("udsl_atm_open successful"); + return 0; +} + +static void udsl_atm_close (struct atm_vcc *vcc) +{ + struct udsl_instance_data *instance = vcc->dev->dev_data; + + dbg ("udsl_atm_close called"); + + if (!instance) { + dbg ("NULL instance!"); + return; + } + + /* freeing resources */ + /* cancel all sends on this vcc */ + udsl_cancel_send (instance, vcc); + + atmsar_close (&(instance->atmsar_vcc_list), vcc->dev_data); + vcc->dev_data = NULL; + clear_bit (ATM_VF_PARTIAL, &vcc->flags); + + /* freeing address */ + vcc->vpi = ATM_VPI_UNSPEC; + vcc->vci = ATM_VCI_UNSPEC; + clear_bit (ATM_VF_ADDR, &vcc->flags); + + MOD_DEC_USE_COUNT; + + dbg ("udsl_atm_close successful"); + return; +} + +static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg) +{ + switch (cmd) { + case ATM_QUERYLOOP: + return put_user (ATM_LM_NONE, (int *) arg) ? -EFAULT : 0; + default: + return -ENOIOCTLCMD; + } +} + + +/********** +** USB ** +**********/ + +static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data) +{ + struct udsl_instance_data *instance = usb_get_intfdata (intf); + + dbg ("udsl_usb_ioctl entered"); + + if (!instance) { + dbg ("NULL instance!"); + return -ENODEV; + } + + switch (code) { + case UDSL_IOCTL_START: + instance->atm_dev->signal = ATM_PHY_SIG_FOUND; + down (&instance->serialize); /* vs self */ + if (!instance->firmware_loaded) { + usb_set_interface (instance->usb_dev, 1, 1); + instance->firmware_loaded = 1; + } + up (&instance->serialize); + udsl_fire_receivers (instance); + return 0; + case UDSL_IOCTL_STOP: + instance->atm_dev->signal = ATM_PHY_SIG_LOST; + return 0; + default: + return -ENOTTY; + } +} + +static int udsl_usb_probe (struct usb_interface *intf, const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(intf); + int ifnum = intf->altsetting->desc.bInterfaceNumber; + struct udsl_instance_data *instance; + unsigned char mac_str [13]; + int i, length; + char *buf; + + dbg ("Trying device with Vendor=0x%x, Product=0x%x, ifnum %d", + dev->descriptor.idVendor, dev->descriptor.idProduct, ifnum); + + if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) || + (dev->descriptor.idVendor != SPEEDTOUCH_VENDORID) || + (dev->descriptor.idProduct != SPEEDTOUCH_PRODUCTID) || (ifnum != 1)) + return -ENODEV; + + dbg ("Device Accepted"); + + /* instance init */ + if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) { + dbg ("No memory for Instance data!"); + return -ENOMEM; + } + + memset (instance, 0, sizeof (struct udsl_instance_data)); + + init_MUTEX (&instance->serialize); + + instance->usb_dev = dev; + + spin_lock_init (&instance->spare_receivers_lock); + INIT_LIST_HEAD (&instance->spare_receivers); + + spin_lock_init (&instance->completed_receivers_lock); + INIT_LIST_HEAD (&instance->completed_receivers); + + tasklet_init (&instance->receive_tasklet, udsl_process_receive, (unsigned long) instance); + + skb_queue_head_init (&instance->sndqueue); + + spin_lock_init (&instance->send_lock); + INIT_LIST_HEAD (&instance->spare_senders); + INIT_LIST_HEAD (&instance->spare_buffers); + + tasklet_init (&instance->send_tasklet, udsl_process_send, (unsigned long) instance); + INIT_LIST_HEAD (&instance->filled_buffers); + + /* receive init */ + for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { + struct udsl_receiver *rcv = &(instance->all_receivers[i]); + + if (!(rcv->skb = dev_alloc_skb (UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE))) { + dbg ("No memory for skb %d!", i); + goto fail; + } + + if (!(rcv->urb = usb_alloc_urb (0, GFP_KERNEL))) { + dbg ("No memory for receive urb %d!", i); + goto fail; + } + + rcv->instance = instance; + + list_add (&rcv->list, &instance->spare_receivers); + + dbg ("skb->truesize = %d (asked for %d)", rcv->skb->truesize, UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE); + } + + /* send init */ + for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) { + struct udsl_sender *snd = &(instance->all_senders[i]); + + if (!(snd->urb = usb_alloc_urb (0, GFP_KERNEL))) { + dbg ("No memory for send urb %d!", i); + goto fail; + } + + snd->instance = instance; + + list_add (&snd->list, &instance->spare_senders); + } + + for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) { + struct udsl_send_buffer *buf = &(instance->all_buffers[i]); + + if (!(buf->base = kmalloc (UDSL_SND_BUFFER_SIZE * ATM_CELL_SIZE, GFP_KERNEL))) { + dbg ("No memory for send buffer %d!", i); + goto fail; + } + + list_add (&buf->list, &instance->spare_buffers); + } + + /* atm init */ + if (!(instance->atm_dev = atm_dev_register (udsl_driver_name, &udsl_atm_devops, -1, 0))) { + dbg ("failed to register ATM device!"); + goto fail; + } + + instance->atm_dev->ci_range.vpi_bits = ATM_CI_MAX; + instance->atm_dev->ci_range.vci_bits = ATM_CI_MAX; + instance->atm_dev->signal = ATM_PHY_SIG_UNKNOWN; + + /* tmp init atm device, set to 128kbit */ + instance->atm_dev->link_rate = 128 * 1000 / 424; + + /* set MAC address, it is stored in the serial number */ + memset (instance->atm_dev->esi, 0, sizeof (instance->atm_dev->esi)); + if (usb_string (dev, dev->descriptor.iSerialNumber, mac_str, sizeof (mac_str)) == 12) + for (i = 0; i < 6; i++) + instance->atm_dev->esi[i] = (hex2int (mac_str[i * 2]) * 16) + (hex2int (mac_str[i * 2 + 1])); + + /* device description */ + buf = instance->description; + length = sizeof (instance->description); + + if ((i = usb_string (dev, dev->descriptor.iProduct, buf, length)) < 0) + goto finish; + + buf += i; + length -= i; + + i = snprintf (buf, length, " ("); + buf += i; + length -= i; + + if (length <= 0 || (i = usb_make_path (dev, buf, length)) < 0) + goto finish; + + buf += i; + length -= i; + + snprintf (buf, length, ")"); + +finish: + /* ready for ATM callbacks */ + instance->atm_dev->dev_data = instance; + + usb_set_intfdata (intf, instance); + + return 0; + +fail: + for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) + kfree (instance->all_buffers[i].base); + + for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) + usb_free_urb (instance->all_senders[i].urb); + + for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { + struct udsl_receiver *rcv = &(instance->all_receivers[i]); + + usb_free_urb (rcv->urb); + + if (rcv->skb) + kfree_skb (rcv->skb); + } + + kfree (instance); + + return -ENOMEM; +} + +static void udsl_usb_disconnect (struct usb_interface *intf) +{ + struct udsl_instance_data *instance = usb_get_intfdata (intf); + struct list_head *pos; + unsigned long flags; + unsigned int count = 0; + int result, i; + + dbg ("disconnecting"); + + usb_set_intfdata (intf, NULL); + + if (!instance) { + dbg ("NULL instance!"); + return; + } + + tasklet_disable (&instance->receive_tasklet); + + /* receive finalize */ + down (&instance->serialize); /* vs udsl_fire_receivers */ + /* no need to take the spinlock */ + list_for_each (pos, &instance->spare_receivers) + if (++count > UDSL_NUMBER_RCV_URBS) + panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); + INIT_LIST_HEAD (&instance->spare_receivers); + up (&instance->serialize); + + dbg ("udsl_usb_disconnect: flushed %u spare receivers", count); + + count = UDSL_NUMBER_RCV_URBS - count; + + for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) + if ((result = usb_unlink_urb (instance->all_receivers[i].urb)) < 0) + dbg ("udsl_usb_disconnect: usb_unlink_urb on receive urb %d returned %d", i, result); + + /* wait for completion handlers to finish */ + do { + unsigned int completed = 0; + + spin_lock_irqsave (&instance->completed_receivers_lock, flags); + list_for_each (pos, &instance->completed_receivers) + if (++completed > count) + panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); + spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); + + dbg ("udsl_usb_disconnect: found %u completed receivers", completed); + + if (completed == count) + break; + + yield (); + } while (1); + + dbg ("udsl_usb_disconnect: flushing"); + /* no need to take the spinlock */ + INIT_LIST_HEAD (&instance->completed_receivers); + + tasklet_enable (&instance->receive_tasklet); + tasklet_kill (&instance->receive_tasklet); + + dbg ("udsl_usb_disconnect: freeing receivers"); + for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { + struct udsl_receiver *rcv = &(instance->all_receivers[i]); + + usb_free_urb (rcv->urb); + kfree_skb (rcv->skb); + } + + /* send finalize */ + tasklet_disable (&instance->send_tasklet); + + for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) + if ((result = usb_unlink_urb (instance->all_senders[i].urb)) < 0) + dbg ("udsl_usb_disconnect: usb_unlink_urb on send urb %d returned %d", i, result); + + /* wait for completion handlers to finish */ + do { + count = 0; + spin_lock_irqsave (&instance->send_lock, flags); + list_for_each (pos, &instance->spare_senders) + if (++count > UDSL_NUMBER_SND_URBS) + panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); + spin_unlock_irqrestore (&instance->send_lock, flags); + + dbg ("udsl_usb_disconnect: found %u spare senders", count); + + if (count == UDSL_NUMBER_SND_URBS) + break; + + yield (); + } while (1); + + dbg ("udsl_usb_disconnect: flushing"); + /* no need to take the spinlock */ + INIT_LIST_HEAD (&instance->spare_senders); + INIT_LIST_HEAD (&instance->spare_buffers); + instance->current_buffer = NULL; + + tasklet_enable (&instance->send_tasklet); + + dbg ("udsl_usb_disconnect: freeing senders"); + for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) + usb_free_urb (instance->all_senders[i].urb); + + dbg ("udsl_usb_disconnect: freeing buffers"); + for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) + kfree (instance->all_buffers[i].base); + + instance->usb_dev = NULL; + + /* atm finalize */ + shutdown_atm_dev (instance->atm_dev); /* frees instance */ +} + + +/*********** +** init ** +***********/ + +static int __init udsl_usb_init (void) +{ + struct sk_buff *skb; /* dummy for sizeof */ + + dbg ("udsl_usb_init: driver version " DRIVER_VERSION); + + if (sizeof (struct udsl_control) > sizeof (skb->cb)) { + printk (KERN_ERR __FILE__ ": unusable with this kernel!\n"); + return -EIO; + } + + return usb_register (&udsl_usb_driver); +} + +static void __exit udsl_usb_cleanup (void) +{ + dbg ("udsl_usb_cleanup"); + + usb_deregister (&udsl_usb_driver); +} + +module_init (udsl_usb_init); +module_exit (udsl_usb_cleanup); + +MODULE_AUTHOR (DRIVER_AUTHOR); +MODULE_DESCRIPTION (DRIVER_DESC); +MODULE_LICENSE ("GPL"); + + +/************ +** debug ** +************/ + +#ifdef DEBUG_PACKET +static int udsl_print_packet (const unsigned char *data, int len) +{ + unsigned char buffer [256]; + int i = 0, j = 0; + + for (i = 0; i < len;) { + buffer[0] = '\0'; + sprintf (buffer, "%.3d :", i); + for (j = 0; (j < 16) && (i < len); j++, i++) { + sprintf (buffer, "%s %2.2x", buffer, data[i]); + } + dbg ("%s", buffer); + } + return i; +} +#endif diff -Nru a/drivers/usb/misc/speedtouch.c b/drivers/usb/misc/speedtouch.c --- a/drivers/usb/misc/speedtouch.c Thu Mar 20 15:04:07 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,1216 +0,0 @@ -/****************************************************************************** - * speedtouch.c -- Alcatel SpeedTouch USB xDSL modem driver. - * - * Copyright (C) 2001, Alcatel - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along with - * this program; if not, write to the Free Software Foundation, Inc., 59 - * Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - ******************************************************************************/ - -/* - * Written by Johan Verrept (Johan.Verrept@advalvas.be) - * - * 1.5A: - Version for inclusion in 2.5 series kernel - * - Modifications by Richard Purdie (rpurdie@rpsys.net) - * - made compatible with kernel 2.5.6 onwards by changing - * udsl_usb_send_data_context->urb to a pointer and adding code - * to alloc and free it - * - remove_wait_queue() added to udsl_atm_processqueue_thread() - * - * 1.5: - fixed memory leak when atmsar_decode_aal5 returned NULL. - * (reported by stephen.robinson@zen.co.uk) - * - * 1.4: - changed the spin_lock() under interrupt to spin_lock_irqsave() - * - unlink all active send urbs of a vcc that is being closed. - * - * 1.3.1: - added the version number - * - * 1.3: - Added multiple send urb support - * - fixed memory leak and vcc->tx_inuse starvation bug - * when not enough memory left in vcc. - * - * 1.2: - Fixed race condition in udsl_usb_send_data() - * 1.1: - Turned off packet debugging - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "atmsar.h" - -/* -#define DEBUG 1 -#define DEBUG_PACKET 1 -*/ - -#include - - -#ifdef DEBUG_PACKET -static int udsl_print_packet (const unsigned char *data, int len); -#define PACKETDEBUG(arg...) udsl_print_packet (arg) -#else -#define PACKETDEBUG(arg...) -#endif - -#define DRIVER_AUTHOR "Johan Verrept, Johan.Verrept@advalvas.be" -#define DRIVER_DESC "Driver for the Alcatel SpeedTouch USB ADSL modem" -#define DRIVER_VERSION "1.5A" - -#define SPEEDTOUCH_VENDORID 0x06b9 -#define SPEEDTOUCH_PRODUCTID 0x4061 - -#define UDSL_NUMBER_RCV_URBS 1 -#define UDSL_NUMBER_SND_URBS 1 -#define UDSL_NUMBER_SND_BUFS (2*UDSL_NUMBER_SND_URBS) -#define UDSL_RCV_BUFFER_SIZE (1*64) /* ATM cells */ -#define UDSL_SND_BUFFER_SIZE (1*64) /* ATM cells */ -/* max should be (1500 IP mtu + 2 ppp bytes + 32 * 5 cellheader overhead) for - * PPPoA and (1500 + 14 + 32*5 cellheader overhead) for PPPoE */ -#define UDSL_MAX_AAL5_MRU 2048 - -#define UDSL_IOCTL_START 1 -#define UDSL_IOCTL_STOP 2 - -/* endpoint declarations */ - -#define UDSL_ENDPOINT_DATA_OUT 0x07 -#define UDSL_ENDPOINT_DATA_IN 0x87 - -#define hex2int(c) ( (c >= '0')&&(c <= '9') ? (c - '0') : ((c & 0xf)+9) ) - -/* usb_device_id struct */ - -static struct usb_device_id udsl_usb_ids [] = { - { USB_DEVICE (SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID) }, - { } /* Terminating entry */ -}; - -MODULE_DEVICE_TABLE (usb, udsl_usb_ids); - -/* context declarations */ - -struct udsl_receiver { - struct list_head list; - struct sk_buff *skb; - struct urb *urb; - struct udsl_instance_data *instance; -}; - -struct udsl_send_buffer { - struct list_head list; - unsigned char *base; - unsigned char *free_start; - unsigned int free_cells; -}; - -struct udsl_sender { - struct list_head list; - struct udsl_send_buffer *buffer; - struct urb *urb; - struct udsl_instance_data *instance; -}; - -struct udsl_control { - struct atm_skb_data atm_data; - unsigned int num_cells; - unsigned int num_entire; - unsigned char cell_header [ATM_CELL_HEADER]; - unsigned int pdu_padding; - unsigned char aal5_trailer [ATM_AAL5_TRAILER]; -}; - -#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb) - -/* - * UDSL main driver data - */ - -struct udsl_instance_data { - struct semaphore serialize; - - /* usb device part */ - struct usb_device *usb_dev; - char description [64]; - int firmware_loaded; - - /* atm device part */ - struct atm_dev *atm_dev; - struct atmsar_vcc_data *atmsar_vcc_list; - - /* receiving */ - struct udsl_receiver all_receivers [UDSL_NUMBER_RCV_URBS]; - - spinlock_t spare_receivers_lock; - struct list_head spare_receivers; - - spinlock_t completed_receivers_lock; - struct list_head completed_receivers; - - struct tasklet_struct receive_tasklet; - - /* sending */ - struct udsl_sender all_senders [UDSL_NUMBER_SND_URBS]; - struct udsl_send_buffer all_buffers [UDSL_NUMBER_SND_BUFS]; - - struct sk_buff_head sndqueue; - - spinlock_t send_lock; - struct list_head spare_senders; - struct list_head spare_buffers; - - struct tasklet_struct send_tasklet; - struct sk_buff *current_skb; /* being emptied */ - struct udsl_send_buffer *current_buffer; /* being filled */ - struct list_head filled_buffers; -}; - -static const char udsl_driver_name [] = "speedtch"; - -/* - * atm driver prototypes and structures - */ - -static void udsl_atm_dev_close (struct atm_dev *dev); -static int udsl_atm_open (struct atm_vcc *vcc, short vpi, int vci); -static void udsl_atm_close (struct atm_vcc *vcc); -static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg); -static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb); -static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page); - -static struct atmdev_ops udsl_atm_devops = { - .dev_close = udsl_atm_dev_close, - .open = udsl_atm_open, - .close = udsl_atm_close, - .ioctl = udsl_atm_ioctl, - .send = udsl_atm_send, - .proc_read = udsl_atm_proc_read, -}; - -/* - * usb driver prototypes and structures - */ -static int udsl_usb_probe (struct usb_interface *intf, - const struct usb_device_id *id); -static void udsl_usb_disconnect (struct usb_interface *intf); -static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data); - -static struct usb_driver udsl_usb_driver = { - .name = udsl_driver_name, - .probe = udsl_usb_probe, - .disconnect = udsl_usb_disconnect, - .ioctl = udsl_usb_ioctl, - .id_table = udsl_usb_ids, -}; - - -/************* -** encode ** -*************/ - -static void udsl_groom_skb (struct atm_vcc *vcc, struct sk_buff *skb) { - struct udsl_control *ctrl = UDSL_SKB (skb); - unsigned int i, zero_padding; - unsigned char zero = 0; - u32 crc; - - ctrl->atm_data.vcc = vcc; - ctrl->cell_header [0] = vcc->vpi >> 4; - ctrl->cell_header [1] = (vcc->vpi << 4) | (vcc->vci >> 12); - ctrl->cell_header [2] = vcc->vci >> 4; - ctrl->cell_header [3] = vcc->vci << 4; - ctrl->cell_header [4] = 0xec; - - ctrl->num_cells = (skb->len + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD; - ctrl->num_entire = skb->len / ATM_CELL_PAYLOAD; - - zero_padding = ctrl->num_cells * ATM_CELL_PAYLOAD - skb->len - ATM_AAL5_TRAILER; - - if (ctrl->num_entire + 1 < ctrl->num_cells) - ctrl->pdu_padding = zero_padding - (ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER); - else - ctrl->pdu_padding = zero_padding; - - ctrl->aal5_trailer [0] = 0; /* UU = 0 */ - ctrl->aal5_trailer [1] = 0; /* CPI = 0 */ - ctrl->aal5_trailer [2] = skb->len >> 8; - ctrl->aal5_trailer [3] = skb->len; - - crc = crc32_be (~0, skb->data, skb->len); - for (i = 0; i < zero_padding; i++) - crc = crc32_be (crc, &zero, 1); - crc = crc32_be (crc, ctrl->aal5_trailer, 4); - crc = ~crc; - - ctrl->aal5_trailer [4] = crc >> 24; - ctrl->aal5_trailer [5] = crc >> 16; - ctrl->aal5_trailer [6] = crc >> 8; - ctrl->aal5_trailer [7] = crc; -} - -unsigned int udsl_write_cells (unsigned int howmany, struct sk_buff *skb, unsigned char **target_p) { - struct udsl_control *ctrl = UDSL_SKB (skb); - unsigned char *target = *target_p; - unsigned int nc, ne, i; - - dbg ("udsl_write_cells: howmany=%u, skb->len=%d, num_cells=%u, num_entire=%u, pdu_padding=%u", howmany, skb->len, ctrl->num_cells, ctrl->num_entire, ctrl->pdu_padding); - - nc = ctrl->num_cells; - ne = min (howmany, ctrl->num_entire); - - for (i = 0; i < ne; i++) { - memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); - target += ATM_CELL_HEADER; - memcpy (target, skb->data, ATM_CELL_PAYLOAD); - target += ATM_CELL_PAYLOAD; - __skb_pull (skb, ATM_CELL_PAYLOAD); - } - - ctrl->num_entire -= ne; - - if (!(ctrl->num_cells -= ne) || !(howmany -= ne)) - goto out; - - memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); - target += ATM_CELL_HEADER; - memcpy (target, skb->data, skb->len); - target += skb->len; - __skb_pull (skb, skb->len); - memset (target, 0, ctrl->pdu_padding); - target += ctrl->pdu_padding; - - if (--ctrl->num_cells) { - if (!--howmany) { - ctrl->pdu_padding = ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER; - goto out; - } - - memcpy (target, ctrl->cell_header, ATM_CELL_HEADER); - target += ATM_CELL_HEADER; - memset (target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER); - target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER; - - if (--ctrl->num_cells) - BUG(); - } - - memcpy (target, ctrl->aal5_trailer, ATM_AAL5_TRAILER); - target += ATM_AAL5_TRAILER; - /* set pti bit in last cell */ - *(target + 3 - ATM_CELL_SIZE) |= 0x2; - -out: - *target_p = target; - return nc - ctrl->num_cells; -} - - -/************** -** receive ** -**************/ - -static void udsl_complete_receive (struct urb *urb, struct pt_regs *regs) -{ - struct udsl_instance_data *instance; - struct udsl_receiver *rcv; - unsigned long flags; - - if (!urb || !(rcv = urb->context) || !(instance = rcv->instance)) { - dbg ("udsl_complete_receive: bad urb!"); - return; - } - - dbg ("udsl_complete_receive entered (urb 0x%p, status %d)", urb, urb->status); - - /* may not be in_interrupt() */ - spin_lock_irqsave (&instance->completed_receivers_lock, flags); - list_add_tail (&rcv->list, &instance->completed_receivers); - tasklet_schedule (&instance->receive_tasklet); - spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); -} - -static void udsl_process_receive (unsigned long data) -{ - struct udsl_instance_data *instance = (struct udsl_instance_data *) data; - struct udsl_receiver *rcv; - unsigned long flags; - unsigned char *data_start; - struct sk_buff *skb; - struct urb *urb; - struct atmsar_vcc_data *atmsar_vcc = NULL; - struct sk_buff *new = NULL, *tmp = NULL; - int err; - - dbg ("udsl_process_receive entered"); - - spin_lock_irqsave (&instance->completed_receivers_lock, flags); - while (!list_empty (&instance->completed_receivers)) { - rcv = list_entry (instance->completed_receivers.next, struct udsl_receiver, list); - list_del (&rcv->list); - spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); - - urb = rcv->urb; - dbg ("udsl_process_receive: got packet %p with length %d and status %d", urb, urb->actual_length, urb->status); - - switch (urb->status) { - case 0: - dbg ("udsl_process_receive: processing urb with rcv %p, urb %p, skb %p", rcv, urb, rcv->skb); - - /* update the skb structure */ - skb = rcv->skb; - skb_trim (skb, 0); - skb_put (skb, urb->actual_length); - data_start = skb->data; - - dbg ("skb->len = %d", skb->len); - PACKETDEBUG (skb->data, skb->len); - - while ((new = - atmsar_decode_rawcell (instance->atmsar_vcc_list, skb, - &atmsar_vcc)) != NULL) { - dbg ("(after cell processing)skb->len = %d", new->len); - - switch (atmsar_vcc->type) { - case ATMSAR_TYPE_AAL5: - tmp = new; - new = atmsar_decode_aal5 (atmsar_vcc, new); - - /* we can't send NULL skbs upstream, the ATM layer would try to close the vcc... */ - if (new) { - dbg ("(after aal5 decap) skb->len = %d", new->len); - if (new->len && atm_charge (atmsar_vcc->vcc, new->truesize)) { - PACKETDEBUG (new->data, new->len); - atmsar_vcc->vcc->push (atmsar_vcc->vcc, new); - } else { - dbg - ("dropping incoming packet : rx_inuse = %d, vcc->sk->rcvbuf = %d, skb->true_size = %d", - atomic_read (&atmsar_vcc->vcc->rx_inuse), - atmsar_vcc->vcc->sk->rcvbuf, new->truesize); - dev_kfree_skb (new); - } - } else { - dbg ("atmsar_decode_aal5 returned NULL!"); - dev_kfree_skb (tmp); - } - break; - default: - /* not supported. we delete the skb. */ - printk (KERN_INFO - "SpeedTouch USB: illegal vcc type. Dropping packet.\n"); - dev_kfree_skb (new); - break; - } - } - - /* restore skb */ - skb_push (skb, skb->data - data_start); - - usb_fill_bulk_urb (urb, - instance->usb_dev, - usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), - (unsigned char *) rcv->skb->data, - UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE, - udsl_complete_receive, - rcv); - if (!(err = usb_submit_urb (urb, GFP_ATOMIC))) - break; - dbg ("udsl_process_receive: submission failed (%d)", err); - /* fall through */ - default: /* error or urb unlinked */ - dbg ("udsl_process_receive: adding to spare_receivers"); - spin_lock_irqsave (&instance->spare_receivers_lock, flags); - list_add (&rcv->list, &instance->spare_receivers); - spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); - break; - } /* switch */ - - spin_lock_irqsave (&instance->completed_receivers_lock, flags); - } /* while */ - spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); - dbg ("udsl_process_receive successful"); -} - -static void udsl_fire_receivers (struct udsl_instance_data *instance) -{ - struct list_head receivers, *pos, *n; - unsigned long flags; - - INIT_LIST_HEAD (&receivers); - - down (&instance->serialize); - - spin_lock_irqsave (&instance->spare_receivers_lock, flags); - list_splice_init (&instance->spare_receivers, &receivers); - spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); - - list_for_each_safe (pos, n, &receivers) { - struct udsl_receiver *rcv = list_entry (pos, struct udsl_receiver, list); - - dbg ("udsl_fire_receivers: firing urb %p", rcv->urb); - - usb_fill_bulk_urb (rcv->urb, - instance->usb_dev, - usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), - (unsigned char *) rcv->skb->data, - UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE, - udsl_complete_receive, - rcv); - - if (usb_submit_urb (rcv->urb, GFP_KERNEL) < 0) { - dbg ("udsl_fire_receivers: submit failed!"); - spin_lock_irqsave (&instance->spare_receivers_lock, flags); - list_move (pos, &instance->spare_receivers); - spin_unlock_irqrestore (&instance->spare_receivers_lock, flags); - } - } - - up (&instance->serialize); -} - - -/*********** -** send ** -***********/ - -static void udsl_complete_send (struct urb *urb, struct pt_regs *regs) -{ - struct udsl_instance_data *instance; - struct udsl_sender *snd; - unsigned long flags; - - if (!urb || !(snd = urb->context) || !(instance = snd->instance)) { - dbg ("udsl_complete_send: bad urb!"); - return; - } - - dbg ("udsl_complete_send entered (urb 0x%p, status %d)", urb, urb->status); - - /* may not be in_interrupt() */ - spin_lock_irqsave (&instance->send_lock, flags); - list_add (&snd->list, &instance->spare_senders); - list_add (&snd->buffer->list, &instance->spare_buffers); - tasklet_schedule (&instance->send_tasklet); - spin_unlock_irqrestore (&instance->send_lock, flags); -} - -static void udsl_process_send (unsigned long data) -{ - struct udsl_send_buffer *buf; - int err; - unsigned long flags; - struct udsl_instance_data *instance = (struct udsl_instance_data *) data; - unsigned int num_written; - struct sk_buff *skb; - struct udsl_sender *snd; - - dbg ("udsl_process_send entered"); - -made_progress: - spin_lock_irqsave (&instance->send_lock, flags); - while (!list_empty (&instance->spare_senders)) { - if (!list_empty (&instance->filled_buffers)) { - buf = list_entry (instance->filled_buffers.next, struct udsl_send_buffer, list); - list_del (&buf->list); - dbg ("sending filled buffer (0x%p)", buf); - } else if ((buf = instance->current_buffer)) { - instance->current_buffer = NULL; - dbg ("sending current buffer (0x%p)", buf); - } else /* all buffers empty */ - break; - - snd = list_entry (instance->spare_senders.next, struct udsl_sender, list); - list_del (&snd->list); - spin_unlock_irqrestore (&instance->send_lock, flags); - - snd->buffer = buf; - usb_fill_bulk_urb (snd->urb, - instance->usb_dev, - usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT), - buf->base, - (UDSL_SND_BUFFER_SIZE - buf->free_cells) * ATM_CELL_SIZE, - udsl_complete_send, - snd); - - dbg ("submitting urb 0x%p, contains %d cells", snd->urb, UDSL_SND_BUFFER_SIZE - buf->free_cells); - - if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) { - dbg ("submission failed (%d)!", err); - spin_lock_irqsave (&instance->send_lock, flags); - list_add (&snd->list, &instance->spare_senders); - spin_unlock_irqrestore (&instance->send_lock, flags); - list_add (&buf->list, &instance->filled_buffers); - return; - } - - spin_lock_irqsave (&instance->send_lock, flags); - } /* while */ - spin_unlock_irqrestore (&instance->send_lock, flags); - - if (!instance->current_skb && !(instance->current_skb = skb_dequeue (&instance->sndqueue))) { - dbg ("done - no more skbs"); - return; - } - - skb = instance->current_skb; - - if (!(buf = instance->current_buffer)) { - spin_lock_irqsave (&instance->send_lock, flags); - if (list_empty (&instance->spare_buffers)) { - instance->current_buffer = NULL; - spin_unlock_irqrestore (&instance->send_lock, flags); - dbg ("done - no more buffers"); - return; - } - buf = list_entry (instance->spare_buffers.next, struct udsl_send_buffer, list); - list_del (&buf->list); - spin_unlock_irqrestore (&instance->send_lock, flags); - - buf->free_start = buf->base; - buf->free_cells = UDSL_SND_BUFFER_SIZE; - - instance->current_buffer = buf; - } - - num_written = udsl_write_cells (buf->free_cells, skb, &buf->free_start); - - dbg ("wrote %u cells from skb 0x%p to buffer 0x%p", num_written, skb, buf); - - if (!(buf->free_cells -= num_written)) { - list_add_tail (&buf->list, &instance->filled_buffers); - instance->current_buffer = NULL; - dbg ("queued filled buffer"); - } - - dbg ("buffer contains %d cells, %d left", UDSL_SND_BUFFER_SIZE - buf->free_cells, buf->free_cells); - - if (!UDSL_SKB (skb)->num_cells) { - struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc; - - dbg ("discarding empty skb"); - if (vcc->pop) - vcc->pop (vcc, skb); - else - kfree_skb (skb); - instance->current_skb = NULL; - - if (vcc->stats) - atomic_inc (&vcc->stats->tx); - } - - goto made_progress; -} - -static void udsl_cancel_send (struct udsl_instance_data *instance, struct atm_vcc *vcc) -{ - unsigned long flags; - struct sk_buff *skb, *n; - - dbg ("udsl_cancel_send entered"); - spin_lock_irqsave (&instance->sndqueue.lock, flags); - for (skb = instance->sndqueue.next, n = skb->next; skb != (struct sk_buff *)&instance->sndqueue; skb = n, n = skb->next) - if (UDSL_SKB (skb)->atm_data.vcc == vcc) { - dbg ("popping skb 0x%p", skb); - __skb_unlink (skb, &instance->sndqueue); - if (vcc->pop) - vcc->pop (vcc, skb); - else - kfree_skb (skb); - } - spin_unlock_irqrestore (&instance->sndqueue.lock, flags); - - tasklet_disable (&instance->send_tasklet); - if ((skb = instance->current_skb) && (UDSL_SKB (skb)->atm_data.vcc == vcc)) { - dbg ("popping current skb (0x%p)", skb); - instance->current_skb = NULL; - if (vcc->pop) - vcc->pop (vcc, skb); - else - kfree_skb (skb); - } - tasklet_enable (&instance->send_tasklet); - dbg ("udsl_cancel_send done"); -} - -static int udsl_atm_send (struct atm_vcc *vcc, struct sk_buff *skb) -{ - struct udsl_instance_data *instance = vcc->dev->dev_data; - - dbg ("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len); - - if (!instance || !instance->usb_dev) { - dbg ("NULL data!"); - return -ENODEV; - } - - if (!instance->firmware_loaded) - return -EAGAIN; - - if (vcc->qos.aal != ATM_AAL5) { - dbg ("unsupported ATM type %d!", vcc->qos.aal); - return -EINVAL; - } - - if (skb->len > ATM_MAX_AAL5_PDU) { - dbg ("packet too long (%d vs %d)!", skb->len, ATM_MAX_AAL5_PDU); - return -EINVAL; - } - - PACKETDEBUG (skb->data, skb->len); - - udsl_groom_skb (vcc, skb); - skb_queue_tail (&instance->sndqueue, skb); - tasklet_schedule (&instance->send_tasklet); - - return 0; -} - - -/********** -** ATM ** -**********/ - -static void udsl_atm_dev_close (struct atm_dev *dev) -{ - struct udsl_instance_data *instance = dev->dev_data; - - if (!instance) { - dbg ("udsl_atm_dev_close: NULL instance!"); - return; - } - - dbg ("udsl_atm_dev_close: queue has %u elements", instance->sndqueue.qlen); - - dbg ("udsl_atm_dev_close: killing tasklet"); - tasklet_kill (&instance->send_tasklet); - dbg ("udsl_atm_dev_close: freeing instance"); - kfree (instance); - dev->dev_data = NULL; -} - -static int udsl_atm_proc_read (struct atm_dev *atm_dev, loff_t *pos, char *page) -{ - struct udsl_instance_data *instance = atm_dev->dev_data; - int left = *pos; - - if (!instance) { - dbg ("NULL instance!"); - return -ENODEV; - } - - if (!left--) - return sprintf (page, "%s\n", instance->description); - - if (!left--) - return sprintf (page, "MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", - atm_dev->esi[0], atm_dev->esi[1], atm_dev->esi[2], - atm_dev->esi[3], atm_dev->esi[4], atm_dev->esi[5]); - - if (!left--) - return sprintf (page, "AAL5: tx %d ( %d err ), rx %d ( %d err, %d drop )\n", - atomic_read (&atm_dev->stats.aal5.tx), - atomic_read (&atm_dev->stats.aal5.tx_err), - atomic_read (&atm_dev->stats.aal5.rx), - atomic_read (&atm_dev->stats.aal5.rx_err), - atomic_read (&atm_dev->stats.aal5.rx_drop)); - - if (!left--) { - switch (atm_dev->signal) { - case ATM_PHY_SIG_FOUND: - sprintf (page, "Line up"); - break; - case ATM_PHY_SIG_LOST: - sprintf (page, "Line down"); - break; - default: - sprintf (page, "Line state unknown"); - break; - } - - if (instance->usb_dev) { - if (!instance->firmware_loaded) - strcat (page, ", no firmware\n"); - else - strcat (page, ", firmware loaded\n"); - } else - strcat (page, ", disconnected\n"); - - return strlen (page); - } - - return 0; -} - -static int udsl_atm_open (struct atm_vcc *vcc, short vpi, int vci) -{ - struct udsl_instance_data *instance = vcc->dev->dev_data; - - dbg ("udsl_atm_open called"); - - if (!instance || !instance->usb_dev) { - dbg ("NULL data!"); - return -ENODEV; - } - - /* at the moment only AAL5 support */ - if (vcc->qos.aal != ATM_AAL5) - return -EINVAL; - - MOD_INC_USE_COUNT; - - vcc->dev_data = - atmsar_open (&(instance->atmsar_vcc_list), vcc, ATMSAR_TYPE_AAL5, vpi, vci, 0, 0, - ATMSAR_USE_53BYTE_CELL | ATMSAR_SET_PTI); - if (!vcc->dev_data) { - MOD_DEC_USE_COUNT; - return -ENOMEM; /* this is the only reason atmsar_open can fail... */ - } - - vcc->vpi = vpi; - vcc->vci = vci; - set_bit (ATM_VF_ADDR, &vcc->flags); - set_bit (ATM_VF_PARTIAL, &vcc->flags); - set_bit (ATM_VF_READY, &vcc->flags); - - ((struct atmsar_vcc_data *)vcc->dev_data)->mtu = UDSL_MAX_AAL5_MRU; - - if (instance->firmware_loaded) - udsl_fire_receivers (instance); - - dbg ("udsl_atm_open successful"); - return 0; -} - -static void udsl_atm_close (struct atm_vcc *vcc) -{ - struct udsl_instance_data *instance = vcc->dev->dev_data; - - dbg ("udsl_atm_close called"); - - if (!instance) { - dbg ("NULL instance!"); - return; - } - - /* freeing resources */ - /* cancel all sends on this vcc */ - udsl_cancel_send (instance, vcc); - - atmsar_close (&(instance->atmsar_vcc_list), vcc->dev_data); - vcc->dev_data = NULL; - clear_bit (ATM_VF_PARTIAL, &vcc->flags); - - /* freeing address */ - vcc->vpi = ATM_VPI_UNSPEC; - vcc->vci = ATM_VCI_UNSPEC; - clear_bit (ATM_VF_ADDR, &vcc->flags); - - MOD_DEC_USE_COUNT; - - dbg ("udsl_atm_close successful"); - return; -} - -static int udsl_atm_ioctl (struct atm_dev *dev, unsigned int cmd, void *arg) -{ - switch (cmd) { - case ATM_QUERYLOOP: - return put_user (ATM_LM_NONE, (int *) arg) ? -EFAULT : 0; - default: - return -ENOIOCTLCMD; - } -} - - -/********** -** USB ** -**********/ - -static int udsl_usb_ioctl (struct usb_interface *intf, unsigned int code, void *user_data) -{ - struct udsl_instance_data *instance = usb_get_intfdata (intf); - - dbg ("udsl_usb_ioctl entered"); - - if (!instance) { - dbg ("NULL instance!"); - return -ENODEV; - } - - switch (code) { - case UDSL_IOCTL_START: - instance->atm_dev->signal = ATM_PHY_SIG_FOUND; - down (&instance->serialize); /* vs self */ - if (!instance->firmware_loaded) { - usb_set_interface (instance->usb_dev, 1, 1); - instance->firmware_loaded = 1; - } - up (&instance->serialize); - udsl_fire_receivers (instance); - return 0; - case UDSL_IOCTL_STOP: - instance->atm_dev->signal = ATM_PHY_SIG_LOST; - return 0; - default: - return -ENOTTY; - } -} - -static int udsl_usb_probe (struct usb_interface *intf, const struct usb_device_id *id) -{ - struct usb_device *dev = interface_to_usbdev(intf); - int ifnum = intf->altsetting->desc.bInterfaceNumber; - struct udsl_instance_data *instance; - unsigned char mac_str [13]; - int i, length; - char *buf; - - dbg ("Trying device with Vendor=0x%x, Product=0x%x, ifnum %d", - dev->descriptor.idVendor, dev->descriptor.idProduct, ifnum); - - if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) || - (dev->descriptor.idVendor != SPEEDTOUCH_VENDORID) || - (dev->descriptor.idProduct != SPEEDTOUCH_PRODUCTID) || (ifnum != 1)) - return -ENODEV; - - dbg ("Device Accepted"); - - /* instance init */ - if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) { - dbg ("No memory for Instance data!"); - return -ENOMEM; - } - - memset (instance, 0, sizeof (struct udsl_instance_data)); - - init_MUTEX (&instance->serialize); - - instance->usb_dev = dev; - - spin_lock_init (&instance->spare_receivers_lock); - INIT_LIST_HEAD (&instance->spare_receivers); - - spin_lock_init (&instance->completed_receivers_lock); - INIT_LIST_HEAD (&instance->completed_receivers); - - tasklet_init (&instance->receive_tasklet, udsl_process_receive, (unsigned long) instance); - - skb_queue_head_init (&instance->sndqueue); - - spin_lock_init (&instance->send_lock); - INIT_LIST_HEAD (&instance->spare_senders); - INIT_LIST_HEAD (&instance->spare_buffers); - - tasklet_init (&instance->send_tasklet, udsl_process_send, (unsigned long) instance); - INIT_LIST_HEAD (&instance->filled_buffers); - - /* receive init */ - for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { - struct udsl_receiver *rcv = &(instance->all_receivers[i]); - - if (!(rcv->skb = dev_alloc_skb (UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE))) { - dbg ("No memory for skb %d!", i); - goto fail; - } - - if (!(rcv->urb = usb_alloc_urb (0, GFP_KERNEL))) { - dbg ("No memory for receive urb %d!", i); - goto fail; - } - - rcv->instance = instance; - - list_add (&rcv->list, &instance->spare_receivers); - - dbg ("skb->truesize = %d (asked for %d)", rcv->skb->truesize, UDSL_RCV_BUFFER_SIZE * ATM_CELL_SIZE); - } - - /* send init */ - for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) { - struct udsl_sender *snd = &(instance->all_senders[i]); - - if (!(snd->urb = usb_alloc_urb (0, GFP_KERNEL))) { - dbg ("No memory for send urb %d!", i); - goto fail; - } - - snd->instance = instance; - - list_add (&snd->list, &instance->spare_senders); - } - - for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) { - struct udsl_send_buffer *buf = &(instance->all_buffers[i]); - - if (!(buf->base = kmalloc (UDSL_SND_BUFFER_SIZE * ATM_CELL_SIZE, GFP_KERNEL))) { - dbg ("No memory for send buffer %d!", i); - goto fail; - } - - list_add (&buf->list, &instance->spare_buffers); - } - - /* atm init */ - if (!(instance->atm_dev = atm_dev_register (udsl_driver_name, &udsl_atm_devops, -1, 0))) { - dbg ("failed to register ATM device!"); - goto fail; - } - - instance->atm_dev->ci_range.vpi_bits = ATM_CI_MAX; - instance->atm_dev->ci_range.vci_bits = ATM_CI_MAX; - instance->atm_dev->signal = ATM_PHY_SIG_UNKNOWN; - - /* tmp init atm device, set to 128kbit */ - instance->atm_dev->link_rate = 128 * 1000 / 424; - - /* set MAC address, it is stored in the serial number */ - memset (instance->atm_dev->esi, 0, sizeof (instance->atm_dev->esi)); - if (usb_string (dev, dev->descriptor.iSerialNumber, mac_str, sizeof (mac_str)) == 12) - for (i = 0; i < 6; i++) - instance->atm_dev->esi[i] = (hex2int (mac_str[i * 2]) * 16) + (hex2int (mac_str[i * 2 + 1])); - - /* device description */ - buf = instance->description; - length = sizeof (instance->description); - - if ((i = usb_string (dev, dev->descriptor.iProduct, buf, length)) < 0) - goto finish; - - buf += i; - length -= i; - - i = snprintf (buf, length, " ("); - buf += i; - length -= i; - - if (length <= 0 || (i = usb_make_path (dev, buf, length)) < 0) - goto finish; - - buf += i; - length -= i; - - snprintf (buf, length, ")"); - -finish: - /* ready for ATM callbacks */ - instance->atm_dev->dev_data = instance; - - usb_set_intfdata (intf, instance); - - return 0; - -fail: - for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) - kfree (instance->all_buffers[i].base); - - for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) - usb_free_urb (instance->all_senders[i].urb); - - for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { - struct udsl_receiver *rcv = &(instance->all_receivers[i]); - - usb_free_urb (rcv->urb); - - if (rcv->skb) - kfree_skb (rcv->skb); - } - - kfree (instance); - - return -ENOMEM; -} - -static void udsl_usb_disconnect (struct usb_interface *intf) -{ - struct udsl_instance_data *instance = usb_get_intfdata (intf); - struct list_head *pos; - unsigned long flags; - unsigned int count = 0; - int result, i; - - dbg ("disconnecting"); - - usb_set_intfdata (intf, NULL); - - if (!instance) { - dbg ("NULL instance!"); - return; - } - - tasklet_disable (&instance->receive_tasklet); - - /* receive finalize */ - down (&instance->serialize); /* vs udsl_fire_receivers */ - /* no need to take the spinlock */ - list_for_each (pos, &instance->spare_receivers) - if (++count > UDSL_NUMBER_RCV_URBS) - panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); - INIT_LIST_HEAD (&instance->spare_receivers); - up (&instance->serialize); - - dbg ("udsl_usb_disconnect: flushed %u spare receivers", count); - - count = UDSL_NUMBER_RCV_URBS - count; - - for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) - if ((result = usb_unlink_urb (instance->all_receivers[i].urb)) < 0) - dbg ("udsl_usb_disconnect: usb_unlink_urb on receive urb %d returned %d", i, result); - - /* wait for completion handlers to finish */ - do { - unsigned int completed = 0; - - spin_lock_irqsave (&instance->completed_receivers_lock, flags); - list_for_each (pos, &instance->completed_receivers) - if (++completed > count) - panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); - spin_unlock_irqrestore (&instance->completed_receivers_lock, flags); - - dbg ("udsl_usb_disconnect: found %u completed receivers", completed); - - if (completed == count) - break; - - yield (); - } while (1); - - dbg ("udsl_usb_disconnect: flushing"); - /* no need to take the spinlock */ - INIT_LIST_HEAD (&instance->completed_receivers); - - tasklet_enable (&instance->receive_tasklet); - tasklet_kill (&instance->receive_tasklet); - - dbg ("udsl_usb_disconnect: freeing receivers"); - for (i = 0; i < UDSL_NUMBER_RCV_URBS; i++) { - struct udsl_receiver *rcv = &(instance->all_receivers[i]); - - usb_free_urb (rcv->urb); - kfree_skb (rcv->skb); - } - - /* send finalize */ - tasklet_disable (&instance->send_tasklet); - - for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) - if ((result = usb_unlink_urb (instance->all_senders[i].urb)) < 0) - dbg ("udsl_usb_disconnect: usb_unlink_urb on send urb %d returned %d", i, result); - - /* wait for completion handlers to finish */ - do { - count = 0; - spin_lock_irqsave (&instance->send_lock, flags); - list_for_each (pos, &instance->spare_senders) - if (++count > UDSL_NUMBER_SND_URBS) - panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); - spin_unlock_irqrestore (&instance->send_lock, flags); - - dbg ("udsl_usb_disconnect: found %u spare senders", count); - - if (count == UDSL_NUMBER_SND_URBS) - break; - - yield (); - } while (1); - - dbg ("udsl_usb_disconnect: flushing"); - /* no need to take the spinlock */ - INIT_LIST_HEAD (&instance->spare_senders); - INIT_LIST_HEAD (&instance->spare_buffers); - instance->current_buffer = NULL; - - tasklet_enable (&instance->send_tasklet); - - dbg ("udsl_usb_disconnect: freeing senders"); - for (i = 0; i < UDSL_NUMBER_SND_URBS; i++) - usb_free_urb (instance->all_senders[i].urb); - - dbg ("udsl_usb_disconnect: freeing buffers"); - for (i = 0; i < UDSL_NUMBER_SND_BUFS; i++) - kfree (instance->all_buffers[i].base); - - instance->usb_dev = NULL; - - /* atm finalize */ - shutdown_atm_dev (instance->atm_dev); /* frees instance */ -} - - -/*********** -** init ** -***********/ - -static int __init udsl_usb_init (void) -{ - struct sk_buff *skb; /* dummy for sizeof */ - - dbg ("udsl_usb_init: driver version " DRIVER_VERSION); - - if (sizeof (struct udsl_control) > sizeof (skb->cb)) { - printk (KERN_ERR __FILE__ ": unusable with this kernel!\n"); - return -EIO; - } - - return usb_register (&udsl_usb_driver); -} - -static void __exit udsl_usb_cleanup (void) -{ - dbg ("udsl_usb_cleanup"); - - usb_deregister (&udsl_usb_driver); -} - -module_init (udsl_usb_init); -module_exit (udsl_usb_cleanup); - -MODULE_AUTHOR (DRIVER_AUTHOR); -MODULE_DESCRIPTION (DRIVER_DESC); -MODULE_LICENSE ("GPL"); - - -/************ -** debug ** -************/ - -#ifdef DEBUG_PACKET -static int udsl_print_packet (const unsigned char *data, int len) -{ - unsigned char buffer [256]; - int i = 0, j = 0; - - for (i = 0; i < len;) { - buffer[0] = '\0'; - sprintf (buffer, "%.3d :", i); - for (j = 0; (j < 16) && (i < len); j++, i++) { - sprintf (buffer, "%s %2.2x", buffer, data[i]); - } - dbg ("%s", buffer); - } - return i; -} -#endif