ChangeSet 1.1005.1.7, 2003/06/27 11:59:24-07:00, baldrick@wanadoo.fr [PATCH] USB speedtouch: use common CRC library Remove the speedtouch CRC library. With this change, the speedtch module is no longer a multi-part object, so fix that up too. drivers/usb/speedcrc.c | 124 ---- drivers/usb/speedcrc.h | 28 drivers/usb/speedtouch.c | 1344 ----------------------------------------------- drivers/usb/Makefile | 4 drivers/usb/Makefile.lib | 1 drivers/usb/speedtch.c | 1344 +++++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 1345 insertions(+), 1500 deletions(-) diff -Nru a/drivers/usb/Makefile b/drivers/usb/Makefile --- a/drivers/usb/Makefile Fri Jun 27 16:27:13 2003 +++ b/drivers/usb/Makefile Fri Jun 27 16:27:13 2003 @@ -19,7 +19,6 @@ 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. @@ -150,6 +149,3 @@ auerswald.o: $(auerswald-objs) $(LD) -r -o $@ $(auerswald-objs) - -speedtch.o: $(speedtch-objs) - $(LD) -r -o $@ $(speedtch-objs) diff -Nru a/drivers/usb/Makefile.lib b/drivers/usb/Makefile.lib --- a/drivers/usb/Makefile.lib Fri Jun 27 16:27:13 2003 +++ b/drivers/usb/Makefile.lib Fri Jun 27 16:27:13 2003 @@ -1,3 +1,4 @@ obj-$(CONFIG_USB_USBNET) += crc32.o obj-$(CONFIG_USB_CATC) += crc32.o +obj-$(CONFIG_USB_SPEEDTOUCH) += crc32.o diff -Nru a/drivers/usb/speedcrc.c b/drivers/usb/speedcrc.c --- a/drivers/usb/speedcrc.c Fri Jun 27 16:27:13 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,124 +0,0 @@ -/****************************************************************************** - * 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 --- a/drivers/usb/speedcrc.h Fri Jun 27 16:27:13 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,28 +0,0 @@ -#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/speedtch.c b/drivers/usb/speedtch.c --- /dev/null Wed Dec 31 16:00:00 1969 +++ b/drivers/usb/speedtch.c Fri Jun 27 16:27:13 2003 @@ -0,0 +1,1344 @@ +/****************************************************************************** + * speedtouch.c - Alcatel SpeedTouch USB xDSL modem driver + * + * Copyright (C) 2001, Alcatel + * Copyright (C) 2003, Duncan Sands + * + * 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, maintained by Duncan Sands (duncan.sands@wanadoo.fr) + * + * 1.6: - No longer opens a connection if the firmware is not loaded + * - Added support for the speedtouch 330 + * - Removed the limit on the number of devices + * - Module now autoloads on device plugin + * - Merged relevant parts of sarlib + * - Replaced the kernel thread with a tasklet + * - New packet transmission code + * - Changed proc file contents + * - Fixed all known SMP races + * - Many fixes and cleanups + * - Various fixes by Oliver Neukum (oliver@neukum.name) + * + * 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 +#include + +/* +#define DEBUG +#define VERBOSE_DEBUG +*/ + +#include + + +#ifdef VERBOSE_DEBUG +static int udsl_print_packet (const unsigned char *data, int len); +#define PACKETDEBUG(arg...) udsl_print_packet (arg) +#define vdbg(arg...) dbg (arg) +#else +#define PACKETDEBUG(arg...) +#define vdbg(arg...) +#endif + +#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands " +#define DRIVER_DESC "Alcatel SpeedTouch USB driver" +#define DRIVER_VERSION "1.6" + +static const char udsl_driver_name [] = "speedtch"; + +#define SPEEDTOUCH_VENDORID 0x06b9 +#define SPEEDTOUCH_PRODUCTID 0x4061 + +#define UDSL_MAX_RCV_URBS 4 +#define UDSL_MAX_SND_URBS 4 +#define UDSL_MAX_RCV_BUFS 8 +#define UDSL_MAX_SND_BUFS 8 +#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */ +#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */ +#define UDSL_DEFAULT_RCV_URBS 1 +#define UDSL_DEFAULT_SND_URBS 1 +#define UDSL_DEFAULT_RCV_BUFS 2 +#define UDSL_DEFAULT_SND_BUFS 2 +#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */ +#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */ + +static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS; +static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS; +static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS; +static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS; +static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE; +static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE; + +MODULE_PARM (num_rcv_urbs, "i"); +MODULE_PARM_DESC (num_rcv_urbs, "Number of urbs used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_URBS) ")"); + +MODULE_PARM (num_snd_urbs, "i"); +MODULE_PARM_DESC (num_snd_urbs, "Number of urbs used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_URBS) ")"); + +MODULE_PARM (num_rcv_bufs, "i"); +MODULE_PARM_DESC (num_rcv_bufs, "Number of buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUFS) ")"); + +MODULE_PARM (num_snd_bufs, "i"); +MODULE_PARM_DESC (num_snd_bufs, "Number of buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUFS) ")"); + +MODULE_PARM (rcv_buf_size, "i"); +MODULE_PARM_DESC (rcv_buf_size, "Size of the buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUF_SIZE) ")"); + +MODULE_PARM (snd_buf_size, "i"); +MODULE_PARM_DESC (snd_buf_size, "Size of the buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUF_SIZE) ")"); + +#define UDSL_IOCTL_LINE_UP 1 +#define UDSL_IOCTL_LINE_DOWN 2 + +#define UDSL_ENDPOINT_DATA_OUT 0x07 +#define UDSL_ENDPOINT_DATA_IN 0x87 + +#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD) +#define UDSL_NUM_CELLS(x) (((x) + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD) + +#define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) ) + +static struct usb_device_id udsl_usb_ids [] = { + { USB_DEVICE (SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID) }, + { } +}; + +MODULE_DEVICE_TABLE (usb, udsl_usb_ids); + +/* receive */ + +struct udsl_receive_buffer { + struct list_head list; + unsigned char *base; + unsigned int filled_cells; +}; + +struct udsl_receiver { + struct list_head list; + struct udsl_receive_buffer *buffer; + struct urb *urb; + struct udsl_instance_data *instance; +}; + +struct udsl_vcc_data { + /* vpi/vci lookup */ + struct list_head list; + short vpi; + int vci; + struct atm_vcc *vcc; + + /* raw cell reassembly */ + struct sk_buff *skb; + unsigned int max_pdu; +}; + +/* send */ + +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 int pdu_padding; + unsigned char cell_header [ATM_CELL_HEADER]; + unsigned char aal5_trailer [ATM_AAL5_TRAILER]; +}; + +#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb) + +/* 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; + + /* receive */ + struct udsl_receiver receivers [UDSL_MAX_RCV_URBS]; + struct udsl_receive_buffer receive_buffers [UDSL_MAX_RCV_BUFS]; + + spinlock_t receive_lock; + struct list_head spare_receivers; + struct list_head filled_receive_buffers; + + struct tasklet_struct receive_tasklet; + struct list_head spare_receive_buffers; + + /* send */ + struct udsl_sender senders [UDSL_MAX_SND_URBS]; + struct udsl_send_buffer send_buffers [UDSL_MAX_SND_BUFS]; + + struct sk_buff_head sndqueue; + + spinlock_t send_lock; + struct list_head spare_senders; + struct list_head spare_send_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_send_buffers; +}; + +/* ATM */ + +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, + owner: THIS_MODULE, +}; + +/* USB */ + +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 = { + owner: THIS_MODULE, + 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->vci == vci) && (vcc->vpi == vpi)) + return vcc; + return NULL; +} + +static void udsl_extract_cells (struct udsl_instance_data *instance, unsigned char *source, unsigned int howmany) +{ + struct udsl_vcc_data *cached_vcc = NULL; + struct atm_vcc *vcc; + struct sk_buff *skb; + struct udsl_vcc_data *vcc_data; + int cached_vci = 0; + unsigned int i; + unsigned int length; + unsigned int pdu_length; + int pti; + int vci; + short cached_vpi = 0; + short vpi; + + for (i = 0; i < howmany; i++, source += ATM_CELL_SIZE) { + vpi = ((source [0] & 0x0f) << 4) | (source [1] >> 4); + vci = ((source [1] & 0x0f) << 12) | (source [2] << 4) | (source [3] >> 4); + pti = (source [3] & 0x2) != 0; + + vdbg ("udsl_extract_cells: vpi %hd, vci %d, pti %d", vpi, vci, pti); + + if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi)) + vcc_data = cached_vcc; + else if ((vcc_data = udsl_find_vcc (instance, vpi, vci))) { + cached_vcc = vcc_data; + cached_vpi = vpi; + cached_vci = vci; + } else { + dbg ("udsl_extract_cells: unknown vpi/vci (%hd/%d)!", vpi, vci); + continue; + } + + vcc = vcc_data->vcc; + + if (!vcc_data->skb && !(vcc_data->skb = dev_alloc_skb (vcc_data->max_pdu))) { + dbg ("udsl_extract_cells: no memory for skb (vcc: 0x%p)!", vcc); + if (pti) + atomic_inc (&vcc->stats->rx_err); + continue; + } + + skb = vcc_data->skb; + + if (skb->len + ATM_CELL_PAYLOAD > vcc_data->max_pdu) { + dbg ("udsl_extract_cells: buffer overrun (max_pdu: %u, skb->len %u, vcc: 0x%p)", vcc_data->max_pdu, skb->len, vcc); + /* discard cells already received */ + skb_trim (skb, 0); + BUG_ON (vcc_data->max_pdu < ATM_CELL_PAYLOAD); + } + + memcpy (skb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD); + __skb_put (skb, ATM_CELL_PAYLOAD); + + if (pti) { + length = (source [ATM_CELL_SIZE - 6] << 8) + source [ATM_CELL_SIZE - 5]; + + /* guard against overflow */ + if (length > ATM_MAX_AAL5_PDU) { + dbg ("udsl_extract_cells: bogus length %u (vcc: 0x%p)", length, vcc); + goto drop; + } + + pdu_length = UDSL_NUM_CELLS (length) * ATM_CELL_PAYLOAD; + + if (skb->len < pdu_length) { + dbg ("udsl_extract_cells: bogus pdu_length %u (skb->len: %u, vcc: 0x%p)", pdu_length, skb->len, vcc); + goto drop; + } + + if (crc32_be (~0, skb->tail - pdu_length, pdu_length) != 0xc704dd7b) { + dbg ("udsl_extract_cells: packet failed crc check (vcc: 0x%p)", vcc); + goto drop; + } + + if (!atm_charge (vcc, skb->truesize)) { + dbg ("udsl_extract_cells: failed atm_charge (skb->truesize: %u)", skb->truesize); + goto drop_no_stats; /* atm_charge increments rx_drop */ + } + + /* now that we are sure to send the skb, it is ok to change skb->data */ + if (skb->len > pdu_length) + skb_pull (skb, skb->len - pdu_length); /* discard initial junk */ + + skb_trim (skb, length); /* drop zero padding and trailer */ + + atomic_inc (&vcc->stats->rx); + + PACKETDEBUG (skb->data, skb->len); + + vdbg ("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize); + + vcc->push (vcc, skb); + + vcc_data->skb = NULL; + + continue; + +drop: + atomic_inc (&vcc->stats->rx_err); +drop_no_stats: + skb_trim (skb, 0); + } + } +} + + +/************* +** encode ** +*************/ + +static const unsigned char zeros [ATM_CELL_PAYLOAD]; + +static void udsl_groom_skb (struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct udsl_control *ctrl = UDSL_SKB (skb); + unsigned int zero_padding; + 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 = UDSL_NUM_CELLS (skb->len); + 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); + crc = crc32_be (crc, zeros, zero_padding); + 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; + + vdbg ("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; + + BUG_ON (--ctrl->num_cells); + } + + 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_receive_buffer *buf; + struct udsl_instance_data *instance; + struct udsl_receiver *rcv; + unsigned long flags; + + if (!urb || !(rcv = urb->context)) { + dbg ("udsl_complete_receive: bad urb!"); + return; + } + + instance = rcv->instance; + buf = rcv->buffer; + + buf->filled_cells = urb->actual_length / ATM_CELL_SIZE; + + vdbg ("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf); + + BUG_ON (buf->filled_cells > rcv_buf_size); + + /* may not be in_interrupt() */ + spin_lock_irqsave (&instance->receive_lock, flags); + list_add (&rcv->list, &instance->spare_receivers); + list_add_tail (&buf->list, &instance->filled_receive_buffers); + if (likely (!urb->status)) + tasklet_schedule (&instance->receive_tasklet); + spin_unlock_irqrestore (&instance->receive_lock, flags); +} + +static void udsl_process_receive (unsigned long data) +{ + struct udsl_receive_buffer *buf; + struct udsl_instance_data *instance = (struct udsl_instance_data *) data; + struct udsl_receiver *rcv; + int err; + +made_progress: + while (!list_empty (&instance->spare_receive_buffers)) { + spin_lock_irq (&instance->receive_lock); + if (list_empty (&instance->spare_receivers)) { + spin_unlock_irq (&instance->receive_lock); + break; + } + rcv = list_entry (instance->spare_receivers.next, struct udsl_receiver, list); + list_del (&rcv->list); + spin_unlock_irq (&instance->receive_lock); + + buf = list_entry (instance->spare_receive_buffers.next, struct udsl_receive_buffer, list); + list_del (&buf->list); + + rcv->buffer = buf; + + FILL_BULK_URB (rcv->urb, + instance->usb_dev, + usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), + buf->base, + rcv_buf_size * ATM_CELL_SIZE, + udsl_complete_receive, + rcv); + rcv->urb->transfer_flags |= USB_QUEUE_BULK; + + vdbg ("udsl_process_receive: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); + + if ((err = usb_submit_urb(rcv->urb)) < 0) { + dbg ("udsl_process_receive: urb submission failed (%d)!", err); + list_add (&buf->list, &instance->spare_receive_buffers); + spin_lock_irq (&instance->receive_lock); + list_add (&rcv->list, &instance->spare_receivers); + spin_unlock_irq (&instance->receive_lock); + break; + } + } + + spin_lock_irq (&instance->receive_lock); + if (list_empty (&instance->filled_receive_buffers)) { + spin_unlock_irq (&instance->receive_lock); + return; /* done - no more buffers */ + } + buf = list_entry (instance->filled_receive_buffers.next, struct udsl_receive_buffer, list); + list_del (&buf->list); + spin_unlock_irq (&instance->receive_lock); + vdbg ("udsl_process_receive: processing buf 0x%p", buf); + udsl_extract_cells (instance, buf->base, buf->filled_cells); + list_add (&buf->list, &instance->spare_receive_buffers); + goto made_progress; +} + + +/*********** +** 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; + } + + vdbg ("udsl_complete_send: urb 0x%p, status %d, snd 0x%p, buf 0x%p", urb, urb->status, snd, snd->buffer); + + /* 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_send_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; + struct udsl_instance_data *instance = (struct udsl_instance_data *) data; + struct sk_buff *skb; + struct udsl_sender *snd; + int err; + unsigned int num_written; + +made_progress: + spin_lock_irq (&instance->send_lock); + while (!list_empty (&instance->spare_senders)) { + if (!list_empty (&instance->filled_send_buffers)) { + buf = list_entry (instance->filled_send_buffers.next, struct udsl_send_buffer, list); + list_del (&buf->list); + } else if ((buf = instance->current_buffer)) { + instance->current_buffer = NULL; + } else /* all buffers empty */ + break; + + snd = list_entry (instance->spare_senders.next, struct udsl_sender, list); + list_del (&snd->list); + spin_unlock_irq (&instance->send_lock); + + snd->buffer = buf; + FILL_BULK_URB (snd->urb, + instance->usb_dev, + usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT), + buf->base, + (snd_buf_size - buf->free_cells) * ATM_CELL_SIZE, + udsl_complete_send, + snd); + snd->urb->transfer_flags |= USB_QUEUE_BULK; + + vdbg ("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p", snd->urb, snd_buf_size - buf->free_cells, snd, buf); + + if ((err = usb_submit_urb(snd->urb)) < 0) { + dbg ("udsl_process_send: urb submission failed (%d)!", err); + spin_lock_irq (&instance->send_lock); + list_add (&snd->list, &instance->spare_senders); + spin_unlock_irq (&instance->send_lock); + list_add (&buf->list, &instance->filled_send_buffers); + return; /* bail out */ + } + + spin_lock_irq (&instance->send_lock); + } /* while */ + spin_unlock_irq (&instance->send_lock); + + if (!instance->current_skb && !(instance->current_skb = skb_dequeue (&instance->sndqueue))) + return; /* done - no more skbs */ + + skb = instance->current_skb; + + if (!(buf = instance->current_buffer)) { + spin_lock_irq (&instance->send_lock); + if (list_empty (&instance->spare_send_buffers)) { + instance->current_buffer = NULL; + spin_unlock_irq (&instance->send_lock); + return; /* done - no more buffers */ + } + buf = list_entry (instance->spare_send_buffers.next, struct udsl_send_buffer, list); + list_del (&buf->list); + spin_unlock_irq (&instance->send_lock); + + buf->free_start = buf->base; + buf->free_cells = snd_buf_size; + + instance->current_buffer = buf; + } + + num_written = udsl_write_cells (buf->free_cells, skb, &buf->free_start); + + vdbg ("udsl_process_send: 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_send_buffers); + instance->current_buffer = NULL; + } + + vdbg ("udsl_process_send: buffer contains %d cells, %d left", snd_buf_size - buf->free_cells, buf->free_cells); + + if (!UDSL_SKB (skb)->num_cells) { + struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc; + + if (vcc->pop) + vcc->pop (vcc, skb); + else + dev_kfree_skb (skb); + instance->current_skb = NULL; + + atomic_inc (&vcc->stats->tx); + } + + goto made_progress; +} + +static void udsl_cancel_send (struct udsl_instance_data *instance, struct atm_vcc *vcc) +{ + struct sk_buff *skb, *n; + + dbg ("udsl_cancel_send entered"); + spin_lock_irq (&instance->sndqueue.lock); + 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 ("udsl_cancel_send: popping skb 0x%p", skb); + __skb_unlink (skb, &instance->sndqueue); + if (vcc->pop) + vcc->pop (vcc, skb); + else + dev_kfree_skb (skb); + } + spin_unlock_irq (&instance->sndqueue.lock); + + tasklet_disable (&instance->send_tasklet); + if ((skb = instance->current_skb) && (UDSL_SKB (skb)->atm_data.vcc == vcc)) { + dbg ("udsl_cancel_send: popping current skb (0x%p)", skb); + instance->current_skb = NULL; + if (vcc->pop) + vcc->pop (vcc, skb); + else + dev_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; + + vdbg ("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len); + + if (!instance || !instance->usb_dev) { + dbg ("udsl_atm_send: NULL data!"); + return -ENODEV; + } + + if (vcc->qos.aal != ATM_AAL5) { + dbg ("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal); + return -EINVAL; + } + + if (skb->len > ATM_MAX_AAL5_PDU) { + dbg ("udsl_atm_send: 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); + + tasklet_kill (&instance->receive_tasklet); + tasklet_kill (&instance->send_tasklet); + 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 ("udsl_atm_proc_read: 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: vpi %hd, vci %d", vpi, vci); + + if (!instance || !instance->usb_dev) { + dbg ("udsl_atm_open: NULL data!"); + return -ENODEV; + } + + if ((vpi == ATM_VPI_ANY) || (vci == ATM_VCI_ANY)) + return -EINVAL; + + /* only support AAL5 */ + if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0) || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) + return -EINVAL; + + if (!instance->firmware_loaded) { + dbg ("udsl_atm_open: 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->max_pdu = max (1, UDSL_NUM_CELLS (vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD; + + 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); + + tasklet_schedule (&instance->receive_tasklet); + + dbg ("udsl_atm_open: allocated vcc data 0x%p (max_pdu: %u)", new, new->max_pdu); + + 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 ("udsl_atm_close: NULL data!"); + return; + } + + dbg ("udsl_atm_close: deallocating 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->skb) + dev_kfree_skb (vcc_data->skb); + vcc_data->skb = 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); + + 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 ("udsl_set_alternate: usb_set_interface returned %d!", ret); + up (&instance->serialize); + return ret; + } + instance->firmware_loaded = 1; + } + up (&instance->serialize); + + tasklet_schedule (&instance->receive_tasklet); + + 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 ("udsl_usb_ioctl: NULL instance!"); + return -ENODEV; + } + + switch (code) { + case UDSL_IOCTL_LINE_UP: + instance->atm_dev->signal = ATM_PHY_SIG_FOUND; + return udsl_set_alternate (instance); + case UDSL_IOCTL_LINE_DOWN: + 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 ("udsl_usb_probe: 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 ("udsl_usb_probe: device accepted"); + + /* instance init */ + if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) { + dbg ("udsl_usb_probe: 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->receive_lock); + INIT_LIST_HEAD (&instance->spare_receivers); + INIT_LIST_HEAD (&instance->filled_receive_buffers); + + tasklet_init (&instance->receive_tasklet, udsl_process_receive, (unsigned long) instance); + INIT_LIST_HEAD (&instance->spare_receive_buffers); + + skb_queue_head_init (&instance->sndqueue); + + spin_lock_init (&instance->send_lock); + INIT_LIST_HEAD (&instance->spare_senders); + INIT_LIST_HEAD (&instance->spare_send_buffers); + + tasklet_init (&instance->send_tasklet, udsl_process_send, (unsigned long) instance); + INIT_LIST_HEAD (&instance->filled_send_buffers); + + /* receive init */ + for (i = 0; i < num_rcv_urbs; i++) { + struct udsl_receiver *rcv = &(instance->receivers [i]); + + if (!(rcv->urb = usb_alloc_urb (0))) { + dbg ("udsl_usb_probe: no memory for receive urb %d!", i); + goto fail; + } + + rcv->instance = instance; + + list_add (&rcv->list, &instance->spare_receivers); + } + + for (i = 0; i < num_rcv_bufs; i++) { + struct udsl_receive_buffer *buf = &(instance->receive_buffers [i]); + + if (!(buf->base = kmalloc (rcv_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) { + dbg ("udsl_usb_probe: no memory for receive buffer %d!", i); + goto fail; + } + + list_add (&buf->list, &instance->spare_receive_buffers); + } + + /* send init */ + for (i = 0; i < num_snd_urbs; i++) { + struct udsl_sender *snd = &(instance->senders [i]); + + if (!(snd->urb = usb_alloc_urb (0))) { + dbg ("udsl_usb_probe: no memory for send urb %d!", i); + goto fail; + } + + snd->instance = instance; + + list_add (&snd->list, &instance->spare_senders); + } + + for (i = 0; i < num_snd_bufs; i++) { + struct udsl_send_buffer *buf = &(instance->send_buffers [i]); + + if (!(buf->base = kmalloc (snd_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) { + dbg ("udsl_usb_probe: no memory for send buffer %d!", i); + goto fail; + } + + list_add (&buf->list, &instance->spare_send_buffers); + } + + /* ATM init */ + if (!(instance->atm_dev = atm_dev_register (udsl_driver_name, &udsl_atm_devops, -1, 0))) { + dbg ("udsl_usb_probe: 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; + + /* temp 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 */ + wmb (); + instance->atm_dev->dev_data = instance; + + return instance; + +fail: + for (i = 0; i < num_snd_bufs; i++) + kfree (instance->send_buffers [i].base); + + for (i = 0; i < num_snd_urbs; i++) + usb_free_urb (instance->senders [i].urb); + + for (i = 0; i < num_rcv_bufs; i++) + kfree (instance->receive_buffers [i].base); + + for (i = 0; i < num_rcv_urbs; i++) + usb_free_urb (instance->receivers [i].urb); + + 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 int count; + int result, i; + + dbg ("udsl_usb_disconnect entered"); + + if (!instance) { + dbg ("udsl_usb_disconnect: NULL instance!"); + return; + } + + /* receive finalize */ + tasklet_disable (&instance->receive_tasklet); + + for (i = 0; i < num_rcv_urbs; i++) + if ((result = usb_unlink_urb (instance->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 { + count = 0; + spin_lock_irq (&instance->receive_lock); + list_for_each (pos, &instance->spare_receivers) + if (++count > num_rcv_urbs) + panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); + spin_unlock_irq (&instance->receive_lock); + + dbg ("udsl_usb_disconnect: found %u spare receivers", count); + + if (count == num_rcv_urbs) + break; + + set_current_state (TASK_RUNNING); + schedule (); + } while (1); + + /* no need to take the spinlock */ + INIT_LIST_HEAD (&instance->filled_receive_buffers); + INIT_LIST_HEAD (&instance->spare_receive_buffers); + + tasklet_enable (&instance->receive_tasklet); + + for (i = 0; i < num_rcv_urbs; i++) + usb_free_urb (instance->receivers [i].urb); + + for (i = 0; i < num_rcv_bufs; i++) + kfree (instance->receive_buffers [i].base); + + /* send finalize */ + tasklet_disable (&instance->send_tasklet); + + for (i = 0; i < num_snd_urbs; i++) + if ((result = usb_unlink_urb (instance->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_irq (&instance->send_lock); + list_for_each (pos, &instance->spare_senders) + if (++count > num_snd_urbs) + panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); + spin_unlock_irq (&instance->send_lock); + + dbg ("udsl_usb_disconnect: found %u spare senders", count); + + if (count == num_snd_urbs) + break; + + set_current_state (TASK_RUNNING); + schedule (); + } while (1); + + /* no need to take the spinlock */ + INIT_LIST_HEAD (&instance->spare_senders); + INIT_LIST_HEAD (&instance->spare_send_buffers); + instance->current_buffer = NULL; + + tasklet_enable (&instance->send_tasklet); + + for (i = 0; i < num_snd_urbs; i++) + usb_free_urb (instance->senders [i].urb); + + for (i = 0; i < num_snd_bufs; i++) + kfree (instance->send_buffers [i].base); + + wmb (); + instance->usb_dev = NULL; + + /* ATM finalize */ + shutdown_atm_dev (instance->atm_dev); /* frees instance, kills tasklets */ +} + + +/*********** +** 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; + } + + if ((num_rcv_urbs > UDSL_MAX_RCV_URBS) || (num_snd_urbs > UDSL_MAX_SND_URBS) || + (num_rcv_bufs > UDSL_MAX_RCV_BUFS) || (num_snd_bufs > UDSL_MAX_SND_BUFS) || + (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE) || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE)) + return -EINVAL; + + return usb_register (&udsl_usb_driver); +} + +static void __exit udsl_usb_cleanup (void) +{ + dbg ("udsl_usb_cleanup entered"); + + 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 VERBOSE_DEBUG +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/speedtouch.c b/drivers/usb/speedtouch.c --- a/drivers/usb/speedtouch.c Fri Jun 27 16:27:13 2003 +++ /dev/null Wed Dec 31 16:00:00 1969 @@ -1,1344 +0,0 @@ -/****************************************************************************** - * speedtouch.c - Alcatel SpeedTouch USB xDSL modem driver - * - * Copyright (C) 2001, Alcatel - * Copyright (C) 2003, Duncan Sands - * - * 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, maintained by Duncan Sands (duncan.sands@wanadoo.fr) - * - * 1.6: - No longer opens a connection if the firmware is not loaded - * - Added support for the speedtouch 330 - * - Removed the limit on the number of devices - * - Module now autoloads on device plugin - * - Merged relevant parts of sarlib - * - Replaced the kernel thread with a tasklet - * - New packet transmission code - * - Changed proc file contents - * - Fixed all known SMP races - * - Many fixes and cleanups - * - Various fixes by Oliver Neukum (oliver@neukum.name) - * - * 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 -#include "speedcrc.h" - -/* -#define DEBUG -#define VERBOSE_DEBUG -*/ - -#include - - -#ifdef VERBOSE_DEBUG -static int udsl_print_packet (const unsigned char *data, int len); -#define PACKETDEBUG(arg...) udsl_print_packet (arg) -#define vdbg(arg...) dbg (arg) -#else -#define PACKETDEBUG(arg...) -#define vdbg(arg...) -#endif - -#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands " -#define DRIVER_DESC "Alcatel SpeedTouch USB driver" -#define DRIVER_VERSION "1.6" - -static const char udsl_driver_name [] = "speedtch"; - -#define SPEEDTOUCH_VENDORID 0x06b9 -#define SPEEDTOUCH_PRODUCTID 0x4061 - -#define UDSL_MAX_RCV_URBS 4 -#define UDSL_MAX_SND_URBS 4 -#define UDSL_MAX_RCV_BUFS 8 -#define UDSL_MAX_SND_BUFS 8 -#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */ -#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */ -#define UDSL_DEFAULT_RCV_URBS 1 -#define UDSL_DEFAULT_SND_URBS 1 -#define UDSL_DEFAULT_RCV_BUFS 2 -#define UDSL_DEFAULT_SND_BUFS 2 -#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */ -#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */ - -static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS; -static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS; -static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS; -static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS; -static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE; -static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE; - -MODULE_PARM (num_rcv_urbs, "i"); -MODULE_PARM_DESC (num_rcv_urbs, "Number of urbs used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_URBS) ")"); - -MODULE_PARM (num_snd_urbs, "i"); -MODULE_PARM_DESC (num_snd_urbs, "Number of urbs used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_URBS) ")"); - -MODULE_PARM (num_rcv_bufs, "i"); -MODULE_PARM_DESC (num_rcv_bufs, "Number of buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUFS) ")"); - -MODULE_PARM (num_snd_bufs, "i"); -MODULE_PARM_DESC (num_snd_bufs, "Number of buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUFS) ")"); - -MODULE_PARM (rcv_buf_size, "i"); -MODULE_PARM_DESC (rcv_buf_size, "Size of the buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUF_SIZE) ")"); - -MODULE_PARM (snd_buf_size, "i"); -MODULE_PARM_DESC (snd_buf_size, "Size of the buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUF_SIZE) ")"); - -#define UDSL_IOCTL_LINE_UP 1 -#define UDSL_IOCTL_LINE_DOWN 2 - -#define UDSL_ENDPOINT_DATA_OUT 0x07 -#define UDSL_ENDPOINT_DATA_IN 0x87 - -#define ATM_CELL_HEADER (ATM_CELL_SIZE - ATM_CELL_PAYLOAD) -#define UDSL_NUM_CELLS(x) (((x) + ATM_AAL5_TRAILER + ATM_CELL_PAYLOAD - 1) / ATM_CELL_PAYLOAD) - -#define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) ) - -static struct usb_device_id udsl_usb_ids [] = { - { USB_DEVICE (SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID) }, - { } -}; - -MODULE_DEVICE_TABLE (usb, udsl_usb_ids); - -/* receive */ - -struct udsl_receive_buffer { - struct list_head list; - unsigned char *base; - unsigned int filled_cells; -}; - -struct udsl_receiver { - struct list_head list; - struct udsl_receive_buffer *buffer; - struct urb *urb; - struct udsl_instance_data *instance; -}; - -struct udsl_vcc_data { - /* vpi/vci lookup */ - struct list_head list; - short vpi; - int vci; - struct atm_vcc *vcc; - - /* raw cell reassembly */ - struct sk_buff *skb; - unsigned int max_pdu; -}; - -/* send */ - -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 int pdu_padding; - unsigned char cell_header [ATM_CELL_HEADER]; - unsigned char aal5_trailer [ATM_AAL5_TRAILER]; -}; - -#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb) - -/* 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; - - /* receive */ - struct udsl_receiver receivers [UDSL_MAX_RCV_URBS]; - struct udsl_receive_buffer receive_buffers [UDSL_MAX_RCV_BUFS]; - - spinlock_t receive_lock; - struct list_head spare_receivers; - struct list_head filled_receive_buffers; - - struct tasklet_struct receive_tasklet; - struct list_head spare_receive_buffers; - - /* send */ - struct udsl_sender senders [UDSL_MAX_SND_URBS]; - struct udsl_send_buffer send_buffers [UDSL_MAX_SND_BUFS]; - - struct sk_buff_head sndqueue; - - spinlock_t send_lock; - struct list_head spare_senders; - struct list_head spare_send_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_send_buffers; -}; - -/* ATM */ - -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, - owner: THIS_MODULE, -}; - -/* USB */ - -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 = { - owner: THIS_MODULE, - 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->vci == vci) && (vcc->vpi == vpi)) - return vcc; - return NULL; -} - -static void udsl_extract_cells (struct udsl_instance_data *instance, unsigned char *source, unsigned int howmany) -{ - struct udsl_vcc_data *cached_vcc = NULL; - struct atm_vcc *vcc; - struct sk_buff *skb; - struct udsl_vcc_data *vcc_data; - int cached_vci = 0; - unsigned int i; - unsigned int length; - unsigned int pdu_length; - int pti; - int vci; - short cached_vpi = 0; - short vpi; - - for (i = 0; i < howmany; i++, source += ATM_CELL_SIZE) { - vpi = ((source [0] & 0x0f) << 4) | (source [1] >> 4); - vci = ((source [1] & 0x0f) << 12) | (source [2] << 4) | (source [3] >> 4); - pti = (source [3] & 0x2) != 0; - - vdbg ("udsl_extract_cells: vpi %hd, vci %d, pti %d", vpi, vci, pti); - - if (cached_vcc && (vci == cached_vci) && (vpi == cached_vpi)) - vcc_data = cached_vcc; - else if ((vcc_data = udsl_find_vcc (instance, vpi, vci))) { - cached_vcc = vcc_data; - cached_vpi = vpi; - cached_vci = vci; - } else { - dbg ("udsl_extract_cells: unknown vpi/vci (%hd/%d)!", vpi, vci); - continue; - } - - vcc = vcc_data->vcc; - - if (!vcc_data->skb && !(vcc_data->skb = dev_alloc_skb (vcc_data->max_pdu))) { - dbg ("udsl_extract_cells: no memory for skb (vcc: 0x%p)!", vcc); - if (pti) - atomic_inc (&vcc->stats->rx_err); - continue; - } - - skb = vcc_data->skb; - - if (skb->len + ATM_CELL_PAYLOAD > vcc_data->max_pdu) { - dbg ("udsl_extract_cells: buffer overrun (max_pdu: %u, skb->len %u, vcc: 0x%p)", vcc_data->max_pdu, skb->len, vcc); - /* discard cells already received */ - skb_trim (skb, 0); - BUG_ON (vcc_data->max_pdu < ATM_CELL_PAYLOAD); - } - - memcpy (skb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD); - __skb_put (skb, ATM_CELL_PAYLOAD); - - if (pti) { - length = (source [ATM_CELL_SIZE - 6] << 8) + source [ATM_CELL_SIZE - 5]; - - /* guard against overflow */ - if (length > ATM_MAX_AAL5_PDU) { - dbg ("udsl_extract_cells: bogus length %u (vcc: 0x%p)", length, vcc); - goto drop; - } - - pdu_length = UDSL_NUM_CELLS (length) * ATM_CELL_PAYLOAD; - - if (skb->len < pdu_length) { - dbg ("udsl_extract_cells: bogus pdu_length %u (skb->len: %u, vcc: 0x%p)", pdu_length, skb->len, vcc); - goto drop; - } - - if (crc32_be (~0, skb->tail - pdu_length, pdu_length) != 0xc704dd7b) { - dbg ("udsl_extract_cells: packet failed crc check (vcc: 0x%p)", vcc); - goto drop; - } - - if (!atm_charge (vcc, skb->truesize)) { - dbg ("udsl_extract_cells: failed atm_charge (skb->truesize: %u)", skb->truesize); - goto drop_no_stats; /* atm_charge increments rx_drop */ - } - - /* now that we are sure to send the skb, it is ok to change skb->data */ - if (skb->len > pdu_length) - skb_pull (skb, skb->len - pdu_length); /* discard initial junk */ - - skb_trim (skb, length); /* drop zero padding and trailer */ - - atomic_inc (&vcc->stats->rx); - - PACKETDEBUG (skb->data, skb->len); - - vdbg ("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize); - - vcc->push (vcc, skb); - - vcc_data->skb = NULL; - - continue; - -drop: - atomic_inc (&vcc->stats->rx_err); -drop_no_stats: - skb_trim (skb, 0); - } - } -} - - -/************* -** encode ** -*************/ - -static const unsigned char zeros [ATM_CELL_PAYLOAD]; - -static void udsl_groom_skb (struct atm_vcc *vcc, struct sk_buff *skb) -{ - struct udsl_control *ctrl = UDSL_SKB (skb); - unsigned int zero_padding; - 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 = UDSL_NUM_CELLS (skb->len); - 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); - crc = crc32_be (crc, zeros, zero_padding); - 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; - - vdbg ("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; - - BUG_ON (--ctrl->num_cells); - } - - 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_receive_buffer *buf; - struct udsl_instance_data *instance; - struct udsl_receiver *rcv; - unsigned long flags; - - if (!urb || !(rcv = urb->context)) { - dbg ("udsl_complete_receive: bad urb!"); - return; - } - - instance = rcv->instance; - buf = rcv->buffer; - - buf->filled_cells = urb->actual_length / ATM_CELL_SIZE; - - vdbg ("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf); - - BUG_ON (buf->filled_cells > rcv_buf_size); - - /* may not be in_interrupt() */ - spin_lock_irqsave (&instance->receive_lock, flags); - list_add (&rcv->list, &instance->spare_receivers); - list_add_tail (&buf->list, &instance->filled_receive_buffers); - if (likely (!urb->status)) - tasklet_schedule (&instance->receive_tasklet); - spin_unlock_irqrestore (&instance->receive_lock, flags); -} - -static void udsl_process_receive (unsigned long data) -{ - struct udsl_receive_buffer *buf; - struct udsl_instance_data *instance = (struct udsl_instance_data *) data; - struct udsl_receiver *rcv; - int err; - -made_progress: - while (!list_empty (&instance->spare_receive_buffers)) { - spin_lock_irq (&instance->receive_lock); - if (list_empty (&instance->spare_receivers)) { - spin_unlock_irq (&instance->receive_lock); - break; - } - rcv = list_entry (instance->spare_receivers.next, struct udsl_receiver, list); - list_del (&rcv->list); - spin_unlock_irq (&instance->receive_lock); - - buf = list_entry (instance->spare_receive_buffers.next, struct udsl_receive_buffer, list); - list_del (&buf->list); - - rcv->buffer = buf; - - FILL_BULK_URB (rcv->urb, - instance->usb_dev, - usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN), - buf->base, - rcv_buf_size * ATM_CELL_SIZE, - udsl_complete_receive, - rcv); - rcv->urb->transfer_flags |= USB_QUEUE_BULK; - - vdbg ("udsl_process_receive: sending urb 0x%p, rcv 0x%p, buf 0x%p", rcv->urb, rcv, buf); - - if ((err = usb_submit_urb(rcv->urb)) < 0) { - dbg ("udsl_process_receive: urb submission failed (%d)!", err); - list_add (&buf->list, &instance->spare_receive_buffers); - spin_lock_irq (&instance->receive_lock); - list_add (&rcv->list, &instance->spare_receivers); - spin_unlock_irq (&instance->receive_lock); - break; - } - } - - spin_lock_irq (&instance->receive_lock); - if (list_empty (&instance->filled_receive_buffers)) { - spin_unlock_irq (&instance->receive_lock); - return; /* done - no more buffers */ - } - buf = list_entry (instance->filled_receive_buffers.next, struct udsl_receive_buffer, list); - list_del (&buf->list); - spin_unlock_irq (&instance->receive_lock); - vdbg ("udsl_process_receive: processing buf 0x%p", buf); - udsl_extract_cells (instance, buf->base, buf->filled_cells); - list_add (&buf->list, &instance->spare_receive_buffers); - goto made_progress; -} - - -/*********** -** 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; - } - - vdbg ("udsl_complete_send: urb 0x%p, status %d, snd 0x%p, buf 0x%p", urb, urb->status, snd, snd->buffer); - - /* 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_send_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; - struct udsl_instance_data *instance = (struct udsl_instance_data *) data; - struct sk_buff *skb; - struct udsl_sender *snd; - int err; - unsigned int num_written; - -made_progress: - spin_lock_irq (&instance->send_lock); - while (!list_empty (&instance->spare_senders)) { - if (!list_empty (&instance->filled_send_buffers)) { - buf = list_entry (instance->filled_send_buffers.next, struct udsl_send_buffer, list); - list_del (&buf->list); - } else if ((buf = instance->current_buffer)) { - instance->current_buffer = NULL; - } else /* all buffers empty */ - break; - - snd = list_entry (instance->spare_senders.next, struct udsl_sender, list); - list_del (&snd->list); - spin_unlock_irq (&instance->send_lock); - - snd->buffer = buf; - FILL_BULK_URB (snd->urb, - instance->usb_dev, - usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT), - buf->base, - (snd_buf_size - buf->free_cells) * ATM_CELL_SIZE, - udsl_complete_send, - snd); - snd->urb->transfer_flags |= USB_QUEUE_BULK; - - vdbg ("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p", snd->urb, snd_buf_size - buf->free_cells, snd, buf); - - if ((err = usb_submit_urb(snd->urb)) < 0) { - dbg ("udsl_process_send: urb submission failed (%d)!", err); - spin_lock_irq (&instance->send_lock); - list_add (&snd->list, &instance->spare_senders); - spin_unlock_irq (&instance->send_lock); - list_add (&buf->list, &instance->filled_send_buffers); - return; /* bail out */ - } - - spin_lock_irq (&instance->send_lock); - } /* while */ - spin_unlock_irq (&instance->send_lock); - - if (!instance->current_skb && !(instance->current_skb = skb_dequeue (&instance->sndqueue))) - return; /* done - no more skbs */ - - skb = instance->current_skb; - - if (!(buf = instance->current_buffer)) { - spin_lock_irq (&instance->send_lock); - if (list_empty (&instance->spare_send_buffers)) { - instance->current_buffer = NULL; - spin_unlock_irq (&instance->send_lock); - return; /* done - no more buffers */ - } - buf = list_entry (instance->spare_send_buffers.next, struct udsl_send_buffer, list); - list_del (&buf->list); - spin_unlock_irq (&instance->send_lock); - - buf->free_start = buf->base; - buf->free_cells = snd_buf_size; - - instance->current_buffer = buf; - } - - num_written = udsl_write_cells (buf->free_cells, skb, &buf->free_start); - - vdbg ("udsl_process_send: 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_send_buffers); - instance->current_buffer = NULL; - } - - vdbg ("udsl_process_send: buffer contains %d cells, %d left", snd_buf_size - buf->free_cells, buf->free_cells); - - if (!UDSL_SKB (skb)->num_cells) { - struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc; - - if (vcc->pop) - vcc->pop (vcc, skb); - else - dev_kfree_skb (skb); - instance->current_skb = NULL; - - atomic_inc (&vcc->stats->tx); - } - - goto made_progress; -} - -static void udsl_cancel_send (struct udsl_instance_data *instance, struct atm_vcc *vcc) -{ - struct sk_buff *skb, *n; - - dbg ("udsl_cancel_send entered"); - spin_lock_irq (&instance->sndqueue.lock); - 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 ("udsl_cancel_send: popping skb 0x%p", skb); - __skb_unlink (skb, &instance->sndqueue); - if (vcc->pop) - vcc->pop (vcc, skb); - else - dev_kfree_skb (skb); - } - spin_unlock_irq (&instance->sndqueue.lock); - - tasklet_disable (&instance->send_tasklet); - if ((skb = instance->current_skb) && (UDSL_SKB (skb)->atm_data.vcc == vcc)) { - dbg ("udsl_cancel_send: popping current skb (0x%p)", skb); - instance->current_skb = NULL; - if (vcc->pop) - vcc->pop (vcc, skb); - else - dev_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; - - vdbg ("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len); - - if (!instance || !instance->usb_dev) { - dbg ("udsl_atm_send: NULL data!"); - return -ENODEV; - } - - if (vcc->qos.aal != ATM_AAL5) { - dbg ("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal); - return -EINVAL; - } - - if (skb->len > ATM_MAX_AAL5_PDU) { - dbg ("udsl_atm_send: 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); - - tasklet_kill (&instance->receive_tasklet); - tasklet_kill (&instance->send_tasklet); - 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 ("udsl_atm_proc_read: 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: vpi %hd, vci %d", vpi, vci); - - if (!instance || !instance->usb_dev) { - dbg ("udsl_atm_open: NULL data!"); - return -ENODEV; - } - - if ((vpi == ATM_VPI_ANY) || (vci == ATM_VCI_ANY)) - return -EINVAL; - - /* only support AAL5 */ - if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0) || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) - return -EINVAL; - - if (!instance->firmware_loaded) { - dbg ("udsl_atm_open: 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->max_pdu = max (1, UDSL_NUM_CELLS (vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD; - - 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); - - tasklet_schedule (&instance->receive_tasklet); - - dbg ("udsl_atm_open: allocated vcc data 0x%p (max_pdu: %u)", new, new->max_pdu); - - 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 ("udsl_atm_close: NULL data!"); - return; - } - - dbg ("udsl_atm_close: deallocating 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->skb) - dev_kfree_skb (vcc_data->skb); - vcc_data->skb = 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); - - 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 ("udsl_set_alternate: usb_set_interface returned %d!", ret); - up (&instance->serialize); - return ret; - } - instance->firmware_loaded = 1; - } - up (&instance->serialize); - - tasklet_schedule (&instance->receive_tasklet); - - 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 ("udsl_usb_ioctl: NULL instance!"); - return -ENODEV; - } - - switch (code) { - case UDSL_IOCTL_LINE_UP: - instance->atm_dev->signal = ATM_PHY_SIG_FOUND; - return udsl_set_alternate (instance); - case UDSL_IOCTL_LINE_DOWN: - 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 ("udsl_usb_probe: 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 ("udsl_usb_probe: device accepted"); - - /* instance init */ - if (!(instance = kmalloc (sizeof (struct udsl_instance_data), GFP_KERNEL))) { - dbg ("udsl_usb_probe: 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->receive_lock); - INIT_LIST_HEAD (&instance->spare_receivers); - INIT_LIST_HEAD (&instance->filled_receive_buffers); - - tasklet_init (&instance->receive_tasklet, udsl_process_receive, (unsigned long) instance); - INIT_LIST_HEAD (&instance->spare_receive_buffers); - - skb_queue_head_init (&instance->sndqueue); - - spin_lock_init (&instance->send_lock); - INIT_LIST_HEAD (&instance->spare_senders); - INIT_LIST_HEAD (&instance->spare_send_buffers); - - tasklet_init (&instance->send_tasklet, udsl_process_send, (unsigned long) instance); - INIT_LIST_HEAD (&instance->filled_send_buffers); - - /* receive init */ - for (i = 0; i < num_rcv_urbs; i++) { - struct udsl_receiver *rcv = &(instance->receivers [i]); - - if (!(rcv->urb = usb_alloc_urb (0))) { - dbg ("udsl_usb_probe: no memory for receive urb %d!", i); - goto fail; - } - - rcv->instance = instance; - - list_add (&rcv->list, &instance->spare_receivers); - } - - for (i = 0; i < num_rcv_bufs; i++) { - struct udsl_receive_buffer *buf = &(instance->receive_buffers [i]); - - if (!(buf->base = kmalloc (rcv_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) { - dbg ("udsl_usb_probe: no memory for receive buffer %d!", i); - goto fail; - } - - list_add (&buf->list, &instance->spare_receive_buffers); - } - - /* send init */ - for (i = 0; i < num_snd_urbs; i++) { - struct udsl_sender *snd = &(instance->senders [i]); - - if (!(snd->urb = usb_alloc_urb (0))) { - dbg ("udsl_usb_probe: no memory for send urb %d!", i); - goto fail; - } - - snd->instance = instance; - - list_add (&snd->list, &instance->spare_senders); - } - - for (i = 0; i < num_snd_bufs; i++) { - struct udsl_send_buffer *buf = &(instance->send_buffers [i]); - - if (!(buf->base = kmalloc (snd_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) { - dbg ("udsl_usb_probe: no memory for send buffer %d!", i); - goto fail; - } - - list_add (&buf->list, &instance->spare_send_buffers); - } - - /* ATM init */ - if (!(instance->atm_dev = atm_dev_register (udsl_driver_name, &udsl_atm_devops, -1, 0))) { - dbg ("udsl_usb_probe: 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; - - /* temp 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 */ - wmb (); - instance->atm_dev->dev_data = instance; - - return instance; - -fail: - for (i = 0; i < num_snd_bufs; i++) - kfree (instance->send_buffers [i].base); - - for (i = 0; i < num_snd_urbs; i++) - usb_free_urb (instance->senders [i].urb); - - for (i = 0; i < num_rcv_bufs; i++) - kfree (instance->receive_buffers [i].base); - - for (i = 0; i < num_rcv_urbs; i++) - usb_free_urb (instance->receivers [i].urb); - - 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 int count; - int result, i; - - dbg ("udsl_usb_disconnect entered"); - - if (!instance) { - dbg ("udsl_usb_disconnect: NULL instance!"); - return; - } - - /* receive finalize */ - tasklet_disable (&instance->receive_tasklet); - - for (i = 0; i < num_rcv_urbs; i++) - if ((result = usb_unlink_urb (instance->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 { - count = 0; - spin_lock_irq (&instance->receive_lock); - list_for_each (pos, &instance->spare_receivers) - if (++count > num_rcv_urbs) - panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); - spin_unlock_irq (&instance->receive_lock); - - dbg ("udsl_usb_disconnect: found %u spare receivers", count); - - if (count == num_rcv_urbs) - break; - - set_current_state (TASK_RUNNING); - schedule (); - } while (1); - - /* no need to take the spinlock */ - INIT_LIST_HEAD (&instance->filled_receive_buffers); - INIT_LIST_HEAD (&instance->spare_receive_buffers); - - tasklet_enable (&instance->receive_tasklet); - - for (i = 0; i < num_rcv_urbs; i++) - usb_free_urb (instance->receivers [i].urb); - - for (i = 0; i < num_rcv_bufs; i++) - kfree (instance->receive_buffers [i].base); - - /* send finalize */ - tasklet_disable (&instance->send_tasklet); - - for (i = 0; i < num_snd_urbs; i++) - if ((result = usb_unlink_urb (instance->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_irq (&instance->send_lock); - list_for_each (pos, &instance->spare_senders) - if (++count > num_snd_urbs) - panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__); - spin_unlock_irq (&instance->send_lock); - - dbg ("udsl_usb_disconnect: found %u spare senders", count); - - if (count == num_snd_urbs) - break; - - set_current_state (TASK_RUNNING); - schedule (); - } while (1); - - /* no need to take the spinlock */ - INIT_LIST_HEAD (&instance->spare_senders); - INIT_LIST_HEAD (&instance->spare_send_buffers); - instance->current_buffer = NULL; - - tasklet_enable (&instance->send_tasklet); - - for (i = 0; i < num_snd_urbs; i++) - usb_free_urb (instance->senders [i].urb); - - for (i = 0; i < num_snd_bufs; i++) - kfree (instance->send_buffers [i].base); - - wmb (); - instance->usb_dev = NULL; - - /* ATM finalize */ - shutdown_atm_dev (instance->atm_dev); /* frees instance, kills tasklets */ -} - - -/*********** -** 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; - } - - if ((num_rcv_urbs > UDSL_MAX_RCV_URBS) || (num_snd_urbs > UDSL_MAX_SND_URBS) || - (num_rcv_bufs > UDSL_MAX_RCV_BUFS) || (num_snd_bufs > UDSL_MAX_SND_BUFS) || - (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE) || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE)) - return -EINVAL; - - return usb_register (&udsl_usb_driver); -} - -static void __exit udsl_usb_cleanup (void) -{ - dbg ("udsl_usb_cleanup entered"); - - 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 VERBOSE_DEBUG -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