ChangeSet 1.1205, 2003/06/18 16:30:02-07:00, baldrick@wanadoo.fr [PATCH] USB: Backport of USB speedtouch driver to 2.4 Since the 2.5 crc library hasn't been backported to the 2.4 tree yet, I included a crc routine in the speedcrc files. CREDITS | 8 Documentation/Configure.help | 11 MAINTAINERS | 8 drivers/usb/Config.in | 1 drivers/usb/Makefile | 5 drivers/usb/speedcrc.c | 124 +++ drivers/usb/speedcrc.h | 28 drivers/usb/speedtouch.c | 1412 +++++++++++++++++++++++++++++++++++++++++++ 8 files changed, 1597 insertions(+) diff -Nru a/CREDITS b/CREDITS --- a/CREDITS Wed Jun 18 17:36:31 2003 +++ b/CREDITS Wed Jun 18 17:36:32 2003 @@ -2687,6 +2687,14 @@ E: gt8134b@prism.gatech.edu D: Dosemu +N: Duncan Sands +E: duncan.sands@wanadoo.fr +W: http://topo.math.u-psud.fr/~sands +D: Alcatel SpeedTouch USB driver +S: 69 rue Dunois +S: 75013 Paris +S: France + N: Hannu Savolainen E: hannu@opensound.com D: Maintainer of the sound drivers until 2.1.x days. diff -Nru a/Documentation/Configure.help b/Documentation/Configure.help --- a/Documentation/Configure.help Wed Jun 18 17:36:32 2003 +++ b/Documentation/Configure.help Wed Jun 18 17:36:32 2003 @@ -14903,6 +14903,17 @@ The module will be called dsbr100.o. If you want to compile it as a module, say M here and read . +Alcatel Speedtouch USB support +CONFIG_USB_SPEEDTOUCH + Say Y here if you have an Alcatel SpeedTouch USB or SpeedTouch 330 + modem. In order to use your modem you will need to install some user + space tools, see for details. + + This code is also available as a module ( = code which can be + inserted in and removed from the running kernel whenever you want). + The module will be called speedtch.o. If you want to compile it as + a module, say M here and read . + Always do synchronous disk IO for UBD CONFIG_BLK_DEV_UBD_SYNC The User-Mode Linux port includes a driver called UBD which will let diff -Nru a/MAINTAINERS b/MAINTAINERS --- a/MAINTAINERS Wed Jun 18 17:36:32 2003 +++ b/MAINTAINERS Wed Jun 18 17:36:32 2003 @@ -206,6 +206,14 @@ L: linux-scsi@vger.kernel.org S: Maintained +ALCATEL SPEEDTOUCH USB DRIVER +P: Duncan Sands +M: duncan.sands@wanadoo.fr +L: linux-usb-users@lists.sourceforge.net +L: linux-usb-devel@lists.sourceforge.net +W: http://www.linux-usb.org/SpeedTouch/ +S: Maintained + ALTERA EPXA1/EPXA10 DEVELOPMENT BOARD PORT P: Clive Davies M: cdavies@altera.com diff -Nru a/drivers/usb/Config.in b/drivers/usb/Config.in --- a/drivers/usb/Config.in Wed Jun 18 17:36:32 2003 +++ b/drivers/usb/Config.in Wed Jun 18 17:36:32 2003 @@ -105,5 +105,6 @@ dep_tristate ' Texas Instruments Graph Link USB (aka SilverLink) cable support' CONFIG_USB_TIGL $CONFIG_USB dep_tristate ' Tieman Voyager USB Braille display support (EXPERIMENTAL)' CONFIG_USB_BRLVGER $CONFIG_USB $CONFIG_EXPERIMENTAL dep_tristate ' USB LCD device support' CONFIG_USB_LCD $CONFIG_USB + dep_tristate ' Alcatel Speedtouch USB support' CONFIG_USB_SPEEDTOUCH $CONFIG_ATM $CONFIG_USB fi endmenu diff -Nru a/drivers/usb/Makefile b/drivers/usb/Makefile --- a/drivers/usb/Makefile Wed Jun 18 17:36:32 2003 +++ b/drivers/usb/Makefile Wed Jun 18 17:36:32 2003 @@ -19,6 +19,7 @@ hid-objs := hid-core.o pwc-objs := pwc-if.o pwc-misc.o pwc-ctrl.o pwc-uncompress.o auerswald-objs := auerbuf.o auerchain.o auerchar.o auermain.o +speedtch-objs := speedcrc.o speedtouch.o # Optional parts of multipart objects. @@ -117,6 +118,7 @@ obj-$(CONFIG_USB_AUERSWALD) += auerswald.o obj-$(CONFIG_USB_BRLVGER) += brlvger.o obj-$(CONFIG_USB_LCD) += usblcd.o +obj-$(CONFIG_USB_SPEEDTOUCH) += speedtch.o # Object files in subdirectories mod-subdirs := serial host @@ -147,3 +149,6 @@ auerswald.o: $(auerswald-objs) $(LD) -r -o $@ $(auerswald-objs) + +speedtch.o: $(speedtch-objs) + $(LD) -r -o $@ $(speedtch-objs) diff -Nru a/drivers/usb/speedcrc.c b/drivers/usb/speedcrc.c --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/usb/speedcrc.c Wed Jun 18 17:36:32 2003 @@ -0,0 +1,124 @@ +/****************************************************************************** + * speedcrc.c -- CRC library for use with speedtouch. + * + * 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 + +/* + * CRC Routines from net/wan/sbni.c) + * table generated by Rocksoft^tm Model CRC Algorithm Table Generation Program V1.0 + */ +#define CRC32_REMAINDER CBF43926 +#define CRC32_INITIAL 0xffffffff +unsigned long crc32tab[256] = { + 0x00000000L, 0x04C11DB7L, 0x09823B6EL, 0x0D4326D9L, + 0x130476DCL, 0x17C56B6BL, 0x1A864DB2L, 0x1E475005L, + 0x2608EDB8L, 0x22C9F00FL, 0x2F8AD6D6L, 0x2B4BCB61L, + 0x350C9B64L, 0x31CD86D3L, 0x3C8EA00AL, 0x384FBDBDL, + 0x4C11DB70L, 0x48D0C6C7L, 0x4593E01EL, 0x4152FDA9L, + 0x5F15ADACL, 0x5BD4B01BL, 0x569796C2L, 0x52568B75L, + 0x6A1936C8L, 0x6ED82B7FL, 0x639B0DA6L, 0x675A1011L, + 0x791D4014L, 0x7DDC5DA3L, 0x709F7B7AL, 0x745E66CDL, + 0x9823B6E0L, 0x9CE2AB57L, 0x91A18D8EL, 0x95609039L, + 0x8B27C03CL, 0x8FE6DD8BL, 0x82A5FB52L, 0x8664E6E5L, + 0xBE2B5B58L, 0xBAEA46EFL, 0xB7A96036L, 0xB3687D81L, + 0xAD2F2D84L, 0xA9EE3033L, 0xA4AD16EAL, 0xA06C0B5DL, + 0xD4326D90L, 0xD0F37027L, 0xDDB056FEL, 0xD9714B49L, + 0xC7361B4CL, 0xC3F706FBL, 0xCEB42022L, 0xCA753D95L, + 0xF23A8028L, 0xF6FB9D9FL, 0xFBB8BB46L, 0xFF79A6F1L, + 0xE13EF6F4L, 0xE5FFEB43L, 0xE8BCCD9AL, 0xEC7DD02DL, + 0x34867077L, 0x30476DC0L, 0x3D044B19L, 0x39C556AEL, + 0x278206ABL, 0x23431B1CL, 0x2E003DC5L, 0x2AC12072L, + 0x128E9DCFL, 0x164F8078L, 0x1B0CA6A1L, 0x1FCDBB16L, + 0x018AEB13L, 0x054BF6A4L, 0x0808D07DL, 0x0CC9CDCAL, + 0x7897AB07L, 0x7C56B6B0L, 0x71159069L, 0x75D48DDEL, + 0x6B93DDDBL, 0x6F52C06CL, 0x6211E6B5L, 0x66D0FB02L, + 0x5E9F46BFL, 0x5A5E5B08L, 0x571D7DD1L, 0x53DC6066L, + 0x4D9B3063L, 0x495A2DD4L, 0x44190B0DL, 0x40D816BAL, + 0xACA5C697L, 0xA864DB20L, 0xA527FDF9L, 0xA1E6E04EL, + 0xBFA1B04BL, 0xBB60ADFCL, 0xB6238B25L, 0xB2E29692L, + 0x8AAD2B2FL, 0x8E6C3698L, 0x832F1041L, 0x87EE0DF6L, + 0x99A95DF3L, 0x9D684044L, 0x902B669DL, 0x94EA7B2AL, + 0xE0B41DE7L, 0xE4750050L, 0xE9362689L, 0xEDF73B3EL, + 0xF3B06B3BL, 0xF771768CL, 0xFA325055L, 0xFEF34DE2L, + 0xC6BCF05FL, 0xC27DEDE8L, 0xCF3ECB31L, 0xCBFFD686L, + 0xD5B88683L, 0xD1799B34L, 0xDC3ABDEDL, 0xD8FBA05AL, + 0x690CE0EEL, 0x6DCDFD59L, 0x608EDB80L, 0x644FC637L, + 0x7A089632L, 0x7EC98B85L, 0x738AAD5CL, 0x774BB0EBL, + 0x4F040D56L, 0x4BC510E1L, 0x46863638L, 0x42472B8FL, + 0x5C007B8AL, 0x58C1663DL, 0x558240E4L, 0x51435D53L, + 0x251D3B9EL, 0x21DC2629L, 0x2C9F00F0L, 0x285E1D47L, + 0x36194D42L, 0x32D850F5L, 0x3F9B762CL, 0x3B5A6B9BL, + 0x0315D626L, 0x07D4CB91L, 0x0A97ED48L, 0x0E56F0FFL, + 0x1011A0FAL, 0x14D0BD4DL, 0x19939B94L, 0x1D528623L, + 0xF12F560EL, 0xF5EE4BB9L, 0xF8AD6D60L, 0xFC6C70D7L, + 0xE22B20D2L, 0xE6EA3D65L, 0xEBA91BBCL, 0xEF68060BL, + 0xD727BBB6L, 0xD3E6A601L, 0xDEA580D8L, 0xDA649D6FL, + 0xC423CD6AL, 0xC0E2D0DDL, 0xCDA1F604L, 0xC960EBB3L, + 0xBD3E8D7EL, 0xB9FF90C9L, 0xB4BCB610L, 0xB07DABA7L, + 0xAE3AFBA2L, 0xAAFBE615L, 0xA7B8C0CCL, 0xA379DD7BL, + 0x9B3660C6L, 0x9FF77D71L, 0x92B45BA8L, 0x9675461FL, + 0x8832161AL, 0x8CF30BADL, 0x81B02D74L, 0x857130C3L, + 0x5D8A9099L, 0x594B8D2EL, 0x5408ABF7L, 0x50C9B640L, + 0x4E8EE645L, 0x4A4FFBF2L, 0x470CDD2BL, 0x43CDC09CL, + 0x7B827D21L, 0x7F436096L, 0x7200464FL, 0x76C15BF8L, + 0x68860BFDL, 0x6C47164AL, 0x61043093L, 0x65C52D24L, + 0x119B4BE9L, 0x155A565EL, 0x18197087L, 0x1CD86D30L, + 0x029F3D35L, 0x065E2082L, 0x0B1D065BL, 0x0FDC1BECL, + 0x3793A651L, 0x3352BBE6L, 0x3E119D3FL, 0x3AD08088L, + 0x2497D08DL, 0x2056CD3AL, 0x2D15EBE3L, 0x29D4F654L, + 0xC5A92679L, 0xC1683BCEL, 0xCC2B1D17L, 0xC8EA00A0L, + 0xD6AD50A5L, 0xD26C4D12L, 0xDF2F6BCBL, 0xDBEE767CL, + 0xE3A1CBC1L, 0xE760D676L, 0xEA23F0AFL, 0xEEE2ED18L, + 0xF0A5BD1DL, 0xF464A0AAL, 0xF9278673L, 0xFDE69BC4L, + 0x89B8FD09L, 0x8D79E0BEL, 0x803AC667L, 0x84FBDBD0L, + 0x9ABC8BD5L, 0x9E7D9662L, 0x933EB0BBL, 0x97FFAD0CL, + 0xAFB010B1L, 0xAB710D06L, 0xA6322BDFL, 0xA2F33668L, + 0xBCB4666DL, 0xB8757BDAL, 0xB5365D03L, 0xB1F740B4L +}; + +#ifdef CRCASM + +unsigned long spdcrc32 (char *mem, int len, unsigned initial) +{ + unsigned crc, dummy_len; + __asm__ ("xorl %%eax,%%eax\n\t" "1:\n\t" "movl %%edx,%%eax\n\t" "shrl $16,%%eax\n\t" "lodsb\n\t" "xorb %%ah,%%al\n\t" "andl $255,%%eax\n\t" "shll $8,%%edx\n\t" "xorl (%%edi,%%eax,4),%%edx\n\t" "loop 1b":"=d" (crc), + "=c" + (dummy_len) + : "S" (mem), "D" (&crc32tab[0]), "1" (len), "0" (initial) + : "eax"); + return crc; +} + +#else + +#define CRC32(c,crc) (crc32tab[((size_t)(crc>>24) ^ (c)) & 0xff] ^ (((crc) << 8))) + +unsigned long spdcrc32 (char *mem, int len, unsigned initial) +{ + unsigned crc; + crc = initial; + + for (; len; mem++, len--) { + crc = CRC32 (*mem, crc); + } + return (crc); +} +#endif diff -Nru a/drivers/usb/speedcrc.h b/drivers/usb/speedcrc.h --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/usb/speedcrc.h Wed Jun 18 17:36:32 2003 @@ -0,0 +1,28 @@ +#ifndef _SPEEDCRC_H_ +#define _SPEEDCRC_H_ + +/****************************************************************************** + * speedcrc.h -- CRC library for use with speedtouch. + * + * 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. + * + ******************************************************************************/ + +unsigned long spdcrc32 (char *mem, int len, unsigned initial); +#define crc32_be(crc, mem, len) spdcrc32(mem, len, crc); + +#endif /* _SPEEDCRC_H_ */ diff -Nru a/drivers/usb/speedtouch.c b/drivers/usb/speedtouch.c --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/usb/speedtouch.c Wed Jun 18 17:36:32 2003 @@ -0,0 +1,1412 @@ +/****************************************************************************** + * 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: - Backport of 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 "speedcrc.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 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 udsl_vcc_data { + /* vpi/vci lookup */ + struct list_head list; + short vpi; + int vci; + struct atm_vcc *vcc; + + /* raw cell reassembly */ + unsigned short mtu; + 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 list_head 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 void *udsl_usb_probe (struct usb_device *dev, unsigned int ifnum, + const struct usb_device_id *id); +static void udsl_usb_disconnect (struct usb_device *dev, void *ptr); +static int udsl_usb_ioctl (struct usb_device *hub, 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 ** +*************/ + +static inline struct udsl_vcc_data *udsl_find_vcc (struct udsl_instance_data *instance, short vpi, int vci) +{ + struct udsl_vcc_data *vcc; + + list_for_each_entry (vcc, &instance->vcc_list, list) + if ((vcc->vpi == vpi) && (vcc->vci == vci)) + return vcc; + return NULL; +} + +static struct sk_buff *udsl_decode_rawcell (struct udsl_instance_data *instance, struct sk_buff *skb, struct udsl_vcc_data **ctx) +{ + if (!instance || !skb || !ctx) + return NULL; + if (!skb->data || !skb->tail) + return NULL; + + while (skb->len) { + unsigned char *cell = skb->data; + unsigned char *cell_payload; + struct udsl_vcc_data *vcc; + short vpi; + int vci; + + vpi = ((cell[0] & 0x0f) << 4) | (cell[1] >> 4); + vci = ((cell[1] & 0x0f) << 12) | (cell[2] << 4) | (cell[3] >> 4); + + dbg ("udsl_decode_rawcell (0x%p, 0x%p, 0x%p) called", instance, skb, ctx); + dbg ("udsl_decode_rawcell skb->data %p, skb->tail %p", skb->data, skb->tail); + + /* here should the header CRC check be... */ + + if (!(vcc = udsl_find_vcc (instance, vpi, vci))) + dbg ("udsl_decode_rawcell: no vcc found for packet on vpi %d, vci %d", vpi, vci); + else { + dbg ("udsl_decode_rawcell found vcc %p for packet on vpi %d, vci %d", vcc, vpi, vci); + + if (skb->len >= 53) { + cell_payload = cell + 5; + + 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, 53); + *ctx = vcc; + tmp = vcc->reasBuffer; + vcc->reasBuffer = NULL; + + dbg ("udsl_decode_rawcell returns ATM_AAL5 pdu 0x%p with length %d", tmp, tmp->len); + return tmp; + } + } + /* 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, 53); + } else { + /* If data is corrupt and skb doesn't hold a whole cell, flush the lot */ + if (skb_pull (skb, 53) == NULL) + return NULL; + } + } + } + + return NULL; +} + +static struct sk_buff *udsl_decode_aal5 (struct udsl_vcc_data *ctx, struct sk_buff *skb) +{ + uint crc = 0xffffffff; + uint length, pdu_crc, pdu_length; + + dbg ("udsl_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 ("udsl_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->vcc->stats) + atomic_inc (&ctx->vcc->stats->rx_err); + return NULL; + } + + /* is skb too long ? */ + if (skb->len > pdu_length) { + dbg ("udsl_decode_aal5: Warning: readjusting illegal 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 ("udsl_decode_aal5: crc check failed!"); + if (ctx->vcc->stats) + atomic_inc (&ctx->vcc->stats->rx_err); + return NULL; + } + + /* pdu is ok */ + skb_trim (skb, length); + + /* update stats */ + if (ctx->vcc->stats) + atomic_inc (&ctx->vcc->stats->rx); + + dbg ("udsl_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; +} + +static 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 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 udsl_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 = udsl_decode_rawcell (instance, skb, &atmsar_vcc))) { + dbg ("(after cell processing)skb->len = %d", new->len); + + tmp = new; + new = udsl_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 ("udsl_decode_aal5 returned NULL!"); + dev_kfree_skb (tmp); + } + } + + /* restore skb */ + skb_push (skb, skb->data - data_start); + + 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); + urb->transfer_flags |= USB_QUEUE_BULK; + if (!(err = usb_submit_urb (urb))) + 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); + + 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); + rcv->urb->transfer_flags |= USB_QUEUE_BULK; + + if (usb_submit_urb (rcv->urb) < 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 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; + 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); + snd->urb->transfer_flags |= USB_QUEUE_BULK; + + dbg ("submitting urb 0x%p, contains %d cells", snd->urb, UDSL_SND_BUFFER_SIZE - buf->free_cells); + + if ((err = usb_submit_urb(snd->urb)) < 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 (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; + struct udsl_vcc_data *new; + + dbg ("udsl_atm_open called"); + + if (!instance || !instance->usb_dev) { + dbg ("NULL data!"); + return -ENODEV; + } + + if ((vpi == ATM_VPI_ANY) || (vci == ATM_VCI_ANY)) + return -EINVAL; + + /* only support AAL5 */ + if (vcc->qos.aal != ATM_AAL5) + return -EINVAL; + + if (!instance->firmware_loaded) { + dbg ("firmware not loaded!"); + return -EAGAIN; + } + + down (&instance->serialize); /* vs self, udsl_atm_close */ + + if (udsl_find_vcc (instance, vpi, vci)) { + up (&instance->serialize); + return -EADDRINUSE; + } + + if (!(new = kmalloc (sizeof (struct udsl_vcc_data), GFP_KERNEL))) { + up (&instance->serialize); + return -ENOMEM; + } + + memset (new, 0, sizeof (struct udsl_vcc_data)); + new->vcc = vcc; + new->vpi = vpi; + new->vci = vci; + new->mtu = UDSL_MAX_AAL5_MRU; + + vcc->dev_data = new; + vcc->vpi = vpi; + vcc->vci = vci; + + tasklet_disable (&instance->receive_tasklet); + list_add (&new->list, &instance->vcc_list); + tasklet_enable (&instance->receive_tasklet); + + set_bit (ATM_VF_ADDR, &vcc->flags); + set_bit (ATM_VF_PARTIAL, &vcc->flags); + set_bit (ATM_VF_READY, &vcc->flags); + + up (&instance->serialize); + + dbg ("Allocated new SARLib vcc 0x%p with vpi %d vci %d", new, vpi, vci); + + udsl_fire_receivers (instance); + + dbg ("udsl_atm_open successful"); + + MOD_INC_USE_COUNT; + + return 0; +} + +static void udsl_atm_close (struct atm_vcc *vcc) +{ + struct udsl_instance_data *instance = vcc->dev->dev_data; + struct udsl_vcc_data *vcc_data = vcc->dev_data; + + dbg ("udsl_atm_close called"); + + if (!instance || !vcc_data) { + dbg ("NULL data!"); + return; + } + + dbg ("Deallocating SARLib vcc 0x%p with vpi %d vci %d", vcc_data, vcc_data->vpi, vcc_data->vci); + + udsl_cancel_send (instance, vcc); + + down (&instance->serialize); /* vs self, udsl_atm_open */ + + tasklet_disable (&instance->receive_tasklet); + list_del (&vcc_data->list); + tasklet_enable (&instance->receive_tasklet); + + if (vcc_data->reasBuffer) + kfree_skb (vcc_data->reasBuffer); + vcc_data->reasBuffer = NULL; + + kfree (vcc_data); + vcc->dev_data = NULL; + + vcc->vpi = ATM_VPI_UNSPEC; + vcc->vci = ATM_VCI_UNSPEC; + clear_bit (ATM_VF_READY, &vcc->flags); + clear_bit (ATM_VF_PARTIAL, &vcc->flags); + clear_bit (ATM_VF_ADDR, &vcc->flags); + + up (&instance->serialize); + + MOD_DEC_USE_COUNT; + + dbg ("udsl_atm_close successful"); +} + +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_set_alternate (struct udsl_instance_data *instance) +{ + down (&instance->serialize); /* vs self */ + if (!instance->firmware_loaded) { + int ret; + + if ((ret = usb_set_interface (instance->usb_dev, 1, 1)) < 0) { + dbg ("usb_set_interface returned %d!", ret); + up (&instance->serialize); + return ret; + } + instance->firmware_loaded = 1; + } + up (&instance->serialize); + udsl_fire_receivers (instance); + return 0; +} + +static int udsl_usb_ioctl (struct usb_device *dev, unsigned int code, void *user_data) +{ + struct usb_interface *intf = usb_ifnum_to_if (dev, 1); + struct udsl_instance_data *instance = intf->private_data; + + 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; + return udsl_set_alternate (instance); + case UDSL_IOCTL_STOP: + instance->atm_dev->signal = ATM_PHY_SIG_LOST; + return 0; + default: + return -ENOTTY; + } +} + +static void *udsl_usb_probe (struct usb_device *dev, unsigned int ifnum, const struct usb_device_id *id) +{ + 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 NULL; + + dbg ("Device Accepted"); + + /* instance init */ + if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) { + dbg ("No memory for Instance data!"); + return NULL; + } + + memset (instance, 0, sizeof (struct udsl_instance_data)); + + init_MUTEX (&instance->serialize); + + instance->usb_dev = dev; + + INIT_LIST_HEAD (&instance->vcc_list); + + 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))) { + 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))) { + 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; + + return instance; + +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 NULL; +} + +static void udsl_usb_disconnect (struct usb_device *dev, void *ptr) +{ + struct udsl_instance_data *instance = ptr; + struct list_head *pos; + unsigned long flags; + unsigned int count = 0; + int result, i; + + dbg ("disconnecting"); + + 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