From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/usb/atm/Kconfig | 30 ++ drivers/usb/atm/Makefile | 7 + drivers/usb/atm/speedtch.c | 847 +++++++++++++++++++++++++++++++ drivers/usb/atm/usb_atm.c | 1188 ++++++++++++++++++++++++++++++++++++++++++++ drivers/usb/atm/usb_atm.h | 176 +++++++ 5 files changed, 2248 insertions(+) create mode 100644 drivers/usb/atm/Kconfig create mode 100644 drivers/usb/atm/Makefile create mode 100644 drivers/usb/atm/speedtch.c create mode 100644 drivers/usb/atm/usb_atm.c create mode 100644 drivers/usb/atm/usb_atm.h (limited to 'drivers/usb/atm') diff --git a/drivers/usb/atm/Kconfig b/drivers/usb/atm/Kconfig new file mode 100644 index 0000000..0d9f537 --- /dev/null +++ b/drivers/usb/atm/Kconfig @@ -0,0 +1,30 @@ +# +# USB ATM driver configuration +# +comment "USB ATM/DSL drivers" + depends on USB + +config USB_ATM + tristate "Generic USB ATM/DSL core I/O support" + depends on USB && ATM + select CRC32 + default n + help + This provides a library which is used for packet I/O by USB DSL + modems, such as the SpeedTouch driver below. + + To compile this driver as a module, choose M here: the + module will be called usb_atm. + +config USB_SPEEDTOUCH + tristate "Alcatel Speedtouch USB support" + depends on USB && ATM + select USB_ATM + help + 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 the + two parts of the firmware, extracted by the user space tools; see + for details. + + To compile this driver as a module, choose M here: the + module will be called speedtch. diff --git a/drivers/usb/atm/Makefile b/drivers/usb/atm/Makefile new file mode 100644 index 0000000..9213b8b9 --- /dev/null +++ b/drivers/usb/atm/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the rest of the USB drivers +# (the ones that don't fit into any other categories) +# + +obj-$(CONFIG_USB_ATM) += usb_atm.o +obj-$(CONFIG_USB_SPEEDTOUCH) += speedtch.o diff --git a/drivers/usb/atm/speedtch.c b/drivers/usb/atm/speedtch.c new file mode 100644 index 0000000..233f922 --- /dev/null +++ b/drivers/usb/atm/speedtch.c @@ -0,0 +1,847 @@ +/****************************************************************************** + * speedtch.c - Alcatel SpeedTouch USB xDSL modem driver + * + * Copyright (C) 2001, Alcatel + * Copyright (C) 2003, Duncan Sands + * Copyright (C) 2004, David Woodhouse + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + ******************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "usb_atm.h" + +#if defined(CONFIG_FW_LOADER) || defined(CONFIG_FW_LOADER_MODULE) +# define USE_FW_LOADER +#endif + +#define DRIVER_AUTHOR "Johan Verrept, Duncan Sands " +#define DRIVER_VERSION "1.8" +#define DRIVER_DESC "Alcatel SpeedTouch USB driver version " DRIVER_VERSION + +static const char speedtch_driver_name[] = "speedtch"; + +#define SPEEDTOUCH_VENDORID 0x06b9 +#define SPEEDTOUCH_PRODUCTID 0x4061 + +/* Timeout in jiffies */ +#define CTRL_TIMEOUT 2000 +#define DATA_TIMEOUT 2000 + +#define OFFSET_7 0 /* size 1 */ +#define OFFSET_b 1 /* size 8 */ +#define OFFSET_d 9 /* size 4 */ +#define OFFSET_e 13 /* size 1 */ +#define OFFSET_f 14 /* size 1 */ +#define TOTAL 15 + +#define SIZE_7 1 +#define SIZE_b 8 +#define SIZE_d 4 +#define SIZE_e 1 +#define SIZE_f 1 + +static int dl_512_first = 0; +static int sw_buffering = 0; + +module_param(dl_512_first, bool, 0444); +MODULE_PARM_DESC(dl_512_first, "Read 512 bytes before sending firmware"); + +module_param(sw_buffering, uint, 0444); +MODULE_PARM_DESC(sw_buffering, "Enable software buffering"); + +#define UDSL_IOCTL_LINE_UP 1 +#define UDSL_IOCTL_LINE_DOWN 2 + +#define SPEEDTCH_ENDPOINT_INT 0x81 +#define SPEEDTCH_ENDPOINT_DATA 0x07 +#define SPEEDTCH_ENDPOINT_FIRMWARE 0x05 + +#define hex2int(c) ( (c >= '0') && (c <= '9') ? (c - '0') : ((c & 0xf) + 9) ) + +static struct usb_device_id speedtch_usb_ids[] = { + {USB_DEVICE(SPEEDTOUCH_VENDORID, SPEEDTOUCH_PRODUCTID)}, + {} +}; + +MODULE_DEVICE_TABLE(usb, speedtch_usb_ids); + +struct speedtch_instance_data { + struct udsl_instance_data u; + + /* Status */ + struct urb *int_urb; + unsigned char int_data[16]; + struct work_struct poll_work; + struct timer_list poll_timer; +}; +/* USB */ + +static int speedtch_usb_probe(struct usb_interface *intf, + const struct usb_device_id *id); +static void speedtch_usb_disconnect(struct usb_interface *intf); +static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code, + void *user_data); +static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs); +static void speedtch_poll_status(struct speedtch_instance_data *instance); + +static struct usb_driver speedtch_usb_driver = { + .owner = THIS_MODULE, + .name = speedtch_driver_name, + .probe = speedtch_usb_probe, + .disconnect = speedtch_usb_disconnect, + .ioctl = speedtch_usb_ioctl, + .id_table = speedtch_usb_ids, +}; + +/*************** +** firmware ** +***************/ + +static void speedtch_got_firmware(struct speedtch_instance_data *instance, + int got_it) +{ + int err; + struct usb_interface *intf; + + down(&instance->u.serialize); /* vs self, speedtch_firmware_start */ + if (instance->u.status == UDSL_LOADED_FIRMWARE) + goto out; + if (!got_it) { + instance->u.status = UDSL_NO_FIRMWARE; + goto out; + } + if ((err = usb_set_interface(instance->u.usb_dev, 1, 1)) < 0) { + dbg("speedtch_got_firmware: usb_set_interface returned %d!", err); + instance->u.status = UDSL_NO_FIRMWARE; + goto out; + } + + /* Set up interrupt endpoint */ + intf = usb_ifnum_to_if(instance->u.usb_dev, 0); + if (intf && !usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) { + + instance->int_urb = usb_alloc_urb(0, GFP_KERNEL); + if (instance->int_urb) { + + usb_fill_int_urb(instance->int_urb, instance->u.usb_dev, + usb_rcvintpipe(instance->u.usb_dev, SPEEDTCH_ENDPOINT_INT), + instance->int_data, + sizeof(instance->int_data), + speedtch_handle_int, instance, 50); + err = usb_submit_urb(instance->int_urb, GFP_KERNEL); + if (err) { + /* Doesn't matter; we'll poll anyway */ + dbg("speedtch_got_firmware: Submission of interrupt URB failed %d", err); + usb_free_urb(instance->int_urb); + instance->int_urb = NULL; + usb_driver_release_interface(&speedtch_usb_driver, intf); + } + } + } + /* Start status polling */ + mod_timer(&instance->poll_timer, jiffies + (1 * HZ)); + + instance->u.status = UDSL_LOADED_FIRMWARE; + tasklet_schedule(&instance->u.receive_tasklet); + out: + up(&instance->u.serialize); + wake_up_interruptible(&instance->u.firmware_waiters); +} + +static int speedtch_set_swbuff(struct speedtch_instance_data *instance, + int state) +{ + struct usb_device *dev = instance->u.usb_dev; + int ret; + + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 0x32, 0x40, state ? 0x01 : 0x00, + 0x00, NULL, 0, 100); + if (ret < 0) { + printk("Warning: %sabling SW buffering: usb_control_msg returned %d\n", + state ? "En" : "Dis", ret); + return ret; + } + + dbg("speedtch_set_swbuff: %sbled SW buffering", state ? "En" : "Dis"); + return 0; +} + +static void speedtch_test_sequence(struct speedtch_instance_data *instance) +{ + struct usb_device *dev = instance->u.usb_dev; + unsigned char buf[10]; + int ret; + + /* URB 147 */ + buf[0] = 0x1c; + buf[1] = 0x50; + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 0x01, 0x40, 0x0b, 0x00, buf, 2, 100); + if (ret < 0) + printk(KERN_WARNING "%s failed on URB147: %d\n", __func__, ret); + + /* URB 148 */ + buf[0] = 0x32; + buf[1] = 0x00; + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 0x01, 0x40, 0x02, 0x00, buf, 2, 100); + if (ret < 0) + printk(KERN_WARNING "%s failed on URB148: %d\n", __func__, ret); + + /* URB 149 */ + buf[0] = 0x01; + buf[1] = 0x00; + buf[2] = 0x01; + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 0x01, 0x40, 0x03, 0x00, buf, 3, 100); + if (ret < 0) + printk(KERN_WARNING "%s failed on URB149: %d\n", __func__, ret); + + /* URB 150 */ + buf[0] = 0x01; + buf[1] = 0x00; + buf[2] = 0x01; + ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), + 0x01, 0x40, 0x04, 0x00, buf, 3, 100); + if (ret < 0) + printk(KERN_WARNING "%s failed on URB150: %d\n", __func__, ret); +} + +static int speedtch_start_synchro(struct speedtch_instance_data *instance) +{ + struct usb_device *dev = instance->u.usb_dev; + unsigned char buf[2]; + int ret; + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x12, 0xc0, 0x04, 0x00, + buf, sizeof(buf), CTRL_TIMEOUT); + if (ret < 0) { + printk(KERN_WARNING "SpeedTouch: Failed to start ADSL synchronisation: %d\n", ret); + return ret; + } + + dbg("speedtch_start_synchro: modem prodded. %d Bytes returned: %02x %02x", ret, buf[0], buf[1]); + return 0; +} + +static void speedtch_handle_int(struct urb *urb, struct pt_regs *regs) +{ + struct speedtch_instance_data *instance = urb->context; + unsigned int count = urb->actual_length; + int ret; + + /* The magic interrupt for "up state" */ + const static unsigned char up_int[6] = { 0xa1, 0x00, 0x01, 0x00, 0x00, 0x00 }; + /* The magic interrupt for "down state" */ + const static unsigned char down_int[6] = { 0xa1, 0x00, 0x00, 0x00, 0x00, 0x00 }; + + switch (urb->status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated; clean up */ + dbg("%s - urb shutting down with status: %d", __func__, urb->status); + return; + default: + dbg("%s - nonzero urb status received: %d", __func__, urb->status); + goto exit; + } + + if (count < 6) { + dbg("%s - int packet too short", __func__); + goto exit; + } + + if (!memcmp(up_int, instance->int_data, 6)) { + del_timer(&instance->poll_timer); + printk(KERN_NOTICE "DSL line goes up\n"); + } else if (!memcmp(down_int, instance->int_data, 6)) { + printk(KERN_NOTICE "DSL line goes down\n"); + } else { + int i; + + printk(KERN_DEBUG "Unknown interrupt packet of %d bytes:", count); + for (i = 0; i < count; i++) + printk(" %02x", instance->int_data[i]); + printk("\n"); + } + schedule_work(&instance->poll_work); + + exit: + rmb(); + if (!instance->int_urb) + return; + + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret) + err("%s - usb_submit_urb failed with result %d", __func__, ret); +} + +static int speedtch_get_status(struct speedtch_instance_data *instance, + unsigned char *buf) +{ + struct usb_device *dev = instance->u.usb_dev; + int ret; + + memset(buf, 0, TOTAL); + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x12, 0xc0, 0x07, 0x00, buf + OFFSET_7, SIZE_7, + CTRL_TIMEOUT); + if (ret < 0) { + dbg("MSG 7 failed"); + return ret; + } + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x12, 0xc0, 0x0b, 0x00, buf + OFFSET_b, SIZE_b, + CTRL_TIMEOUT); + if (ret < 0) { + dbg("MSG B failed"); + return ret; + } + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x12, 0xc0, 0x0d, 0x00, buf + OFFSET_d, SIZE_d, + CTRL_TIMEOUT); + if (ret < 0) { + dbg("MSG D failed"); + return ret; + } + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x01, 0xc0, 0x0e, 0x00, buf + OFFSET_e, SIZE_e, + CTRL_TIMEOUT); + if (ret < 0) { + dbg("MSG E failed"); + return ret; + } + + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x01, 0xc0, 0x0f, 0x00, buf + OFFSET_f, SIZE_f, + CTRL_TIMEOUT); + if (ret < 0) { + dbg("MSG F failed"); + return ret; + } + + return 0; +} + +static void speedtch_poll_status(struct speedtch_instance_data *instance) +{ + unsigned char buf[TOTAL]; + int ret; + + ret = speedtch_get_status(instance, buf); + if (ret) { + printk(KERN_WARNING + "SpeedTouch: Error %d fetching device status\n", ret); + return; + } + + dbg("Line state %02x", buf[OFFSET_7]); + + switch (buf[OFFSET_7]) { + case 0: + if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) { + instance->u.atm_dev->signal = ATM_PHY_SIG_LOST; + printk(KERN_NOTICE "ADSL line is down\n"); + } + break; + + case 0x08: + if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) { + instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN; + printk(KERN_NOTICE "ADSL line is blocked?\n"); + } + break; + + case 0x10: + if (instance->u.atm_dev->signal != ATM_PHY_SIG_LOST) { + instance->u.atm_dev->signal = ATM_PHY_SIG_LOST; + printk(KERN_NOTICE "ADSL line is synchronising\n"); + } + break; + + case 0x20: + if (instance->u.atm_dev->signal != ATM_PHY_SIG_FOUND) { + int down_speed = buf[OFFSET_b] | (buf[OFFSET_b + 1] << 8) + | (buf[OFFSET_b + 2] << 16) | (buf[OFFSET_b + 3] << 24); + int up_speed = buf[OFFSET_b + 4] | (buf[OFFSET_b + 5] << 8) + | (buf[OFFSET_b + 6] << 16) | (buf[OFFSET_b + 7] << 24); + + if (!(down_speed & 0x0000ffff) && + !(up_speed & 0x0000ffff)) { + down_speed >>= 16; + up_speed >>= 16; + } + instance->u.atm_dev->link_rate = down_speed * 1000 / 424; + instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND; + + printk(KERN_NOTICE + "ADSL line is up (%d Kib/s down | %d Kib/s up)\n", + down_speed, up_speed); + } + break; + + default: + if (instance->u.atm_dev->signal != ATM_PHY_SIG_UNKNOWN) { + instance->u.atm_dev->signal = ATM_PHY_SIG_UNKNOWN; + printk(KERN_NOTICE "Unknown line state %02x\n", buf[OFFSET_7]); + } + break; + } +} + +static void speedtch_timer_poll(unsigned long data) +{ + struct speedtch_instance_data *instance = (void *)data; + + schedule_work(&instance->poll_work); + mod_timer(&instance->poll_timer, jiffies + (5 * HZ)); +} + +#ifdef USE_FW_LOADER +static void speedtch_upload_firmware(struct speedtch_instance_data *instance, + const struct firmware *fw1, + const struct firmware *fw2) +{ + unsigned char *buffer; + struct usb_device *usb_dev = instance->u.usb_dev; + struct usb_interface *intf; + int actual_length, ret; + int offset; + + dbg("speedtch_upload_firmware"); + + if (!(intf = usb_ifnum_to_if(usb_dev, 2))) { + dbg("speedtch_upload_firmware: interface not found!"); + goto fail; + } + + if (!(buffer = (unsigned char *)__get_free_page(GFP_KERNEL))) { + dbg("speedtch_upload_firmware: no memory for buffer!"); + goto fail; + } + + /* A user-space firmware loader may already have claimed interface #2 */ + if ((ret = + usb_driver_claim_interface(&speedtch_usb_driver, intf, NULL)) < 0) { + dbg("speedtch_upload_firmware: interface in use (%d)!", ret); + goto fail_free; + } + + /* URB 7 */ + if (dl_512_first) { /* some modems need a read before writing the firmware */ + ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE), + buffer, 0x200, &actual_length, 2000); + + if (ret < 0 && ret != -ETIMEDOUT) + dbg("speedtch_upload_firmware: read BLOCK0 from modem failed (%d)!", ret); + else + dbg("speedtch_upload_firmware: BLOCK0 downloaded (%d bytes)", ret); + } + + /* URB 8 : both leds are static green */ + for (offset = 0; offset < fw1->size; offset += PAGE_SIZE) { + int thislen = min_t(int, PAGE_SIZE, fw1->size - offset); + memcpy(buffer, fw1->data + offset, thislen); + + ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE), + buffer, thislen, &actual_length, DATA_TIMEOUT); + + if (ret < 0) { + dbg("speedtch_upload_firmware: write BLOCK1 to modem failed (%d)!", ret); + goto fail_release; + } + dbg("speedtch_upload_firmware: BLOCK1 uploaded (%zu bytes)", fw1->size); + } + + /* USB led blinking green, ADSL led off */ + + /* URB 11 */ + ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE), + buffer, 0x200, &actual_length, DATA_TIMEOUT); + + if (ret < 0) { + dbg("speedtch_upload_firmware: read BLOCK2 from modem failed (%d)!", ret); + goto fail_release; + } + dbg("speedtch_upload_firmware: BLOCK2 downloaded (%d bytes)", actual_length); + + /* URBs 12 to 139 - USB led blinking green, ADSL led off */ + for (offset = 0; offset < fw2->size; offset += PAGE_SIZE) { + int thislen = min_t(int, PAGE_SIZE, fw2->size - offset); + memcpy(buffer, fw2->data + offset, thislen); + + ret = usb_bulk_msg(usb_dev, usb_sndbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE), + buffer, thislen, &actual_length, DATA_TIMEOUT); + + if (ret < 0) { + dbg("speedtch_upload_firmware: write BLOCK3 to modem failed (%d)!", ret); + goto fail_release; + } + } + dbg("speedtch_upload_firmware: BLOCK3 uploaded (%zu bytes)", fw2->size); + + /* USB led static green, ADSL led static red */ + + /* URB 142 */ + ret = usb_bulk_msg(usb_dev, usb_rcvbulkpipe(usb_dev, SPEEDTCH_ENDPOINT_FIRMWARE), + buffer, 0x200, &actual_length, DATA_TIMEOUT); + + if (ret < 0) { + dbg("speedtch_upload_firmware: read BLOCK4 from modem failed (%d)!", ret); + goto fail_release; + } + + /* success */ + dbg("speedtch_upload_firmware: BLOCK4 downloaded (%d bytes)", actual_length); + + /* Delay to allow firmware to start up. We can do this here + because we're in our own kernel thread anyway. */ + msleep(1000); + + /* Enable software buffering, if requested */ + if (sw_buffering) + speedtch_set_swbuff(instance, 1); + + /* Magic spell; don't ask us what this does */ + speedtch_test_sequence(instance); + + /* Start modem synchronisation */ + if (speedtch_start_synchro(instance)) + dbg("speedtch_start_synchro: failed"); + + speedtch_got_firmware(instance, 1); + + free_page((unsigned long)buffer); + return; + + fail_release: + /* Only release interface #2 if uploading failed; we don't release it + we succeeded. This prevents the userspace tools from trying to load + the firmware themselves */ + usb_driver_release_interface(&speedtch_usb_driver, intf); + fail_free: + free_page((unsigned long)buffer); + fail: + speedtch_got_firmware(instance, 0); +} + +static int speedtch_find_firmware(struct speedtch_instance_data + *instance, int phase, + const struct firmware **fw_p) +{ + char buf[24]; + const u16 bcdDevice = le16_to_cpu(instance->u.usb_dev->descriptor.bcdDevice); + const u8 major_revision = bcdDevice >> 8; + const u8 minor_revision = bcdDevice & 0xff; + + sprintf(buf, "speedtch-%d.bin.%x.%02x", phase, major_revision, minor_revision); + dbg("speedtch_find_firmware: looking for %s", buf); + + if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) { + sprintf(buf, "speedtch-%d.bin.%x", phase, major_revision); + dbg("speedtch_find_firmware: looking for %s", buf); + + if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) { + sprintf(buf, "speedtch-%d.bin", phase); + dbg("speedtch_find_firmware: looking for %s", buf); + + if (request_firmware(fw_p, buf, &instance->u.usb_dev->dev)) { + dev_warn(&instance->u.usb_dev->dev, "no stage %d firmware found!", phase); + return -ENOENT; + } + } + } + + dev_info(&instance->u.usb_dev->dev, "found stage %d firmware %s\n", phase, buf); + + return 0; +} + +static int speedtch_load_firmware(void *arg) +{ + const struct firmware *fw1, *fw2; + struct speedtch_instance_data *instance = arg; + + BUG_ON(!instance); + + daemonize("firmware/speedtch"); + + if (!speedtch_find_firmware(instance, 1, &fw1)) { + if (!speedtch_find_firmware(instance, 2, &fw2)) { + speedtch_upload_firmware(instance, fw1, fw2); + release_firmware(fw2); + } + release_firmware(fw1); + } + + /* In case we failed, set state back to NO_FIRMWARE so that + another later attempt may work. Otherwise, we never actually + manage to recover if, for example, the firmware is on /usr and + we look for it too early. */ + speedtch_got_firmware(instance, 0); + + module_put(THIS_MODULE); + udsl_put_instance(&instance->u); + return 0; +} +#endif /* USE_FW_LOADER */ + +static void speedtch_firmware_start(struct speedtch_instance_data *instance) +{ +#ifdef USE_FW_LOADER + int ret; +#endif + + dbg("speedtch_firmware_start"); + + down(&instance->u.serialize); /* vs self, speedtch_got_firmware */ + + if (instance->u.status >= UDSL_LOADING_FIRMWARE) { + up(&instance->u.serialize); + return; + } + + instance->u.status = UDSL_LOADING_FIRMWARE; + up(&instance->u.serialize); + +#ifdef USE_FW_LOADER + udsl_get_instance(&instance->u); + try_module_get(THIS_MODULE); + + ret = kernel_thread(speedtch_load_firmware, instance, + CLONE_FS | CLONE_FILES); + + if (ret >= 0) + return; /* OK */ + + dbg("speedtch_firmware_start: kernel_thread failed (%d)!", ret); + + module_put(THIS_MODULE); + udsl_put_instance(&instance->u); + /* Just pretend it never happened... hope modem_run happens */ +#endif /* USE_FW_LOADER */ + + speedtch_got_firmware(instance, 0); +} + +static int speedtch_firmware_wait(struct udsl_instance_data *instance) +{ + speedtch_firmware_start((void *)instance); + + if (wait_event_interruptible(instance->firmware_waiters, instance->status != UDSL_LOADING_FIRMWARE) < 0) + return -ERESTARTSYS; + + return (instance->status == UDSL_LOADED_FIRMWARE) ? 0 : -EAGAIN; +} + +/********** +** USB ** +**********/ + +static int speedtch_usb_ioctl(struct usb_interface *intf, unsigned int code, + void *user_data) +{ + struct speedtch_instance_data *instance = usb_get_intfdata(intf); + + dbg("speedtch_usb_ioctl entered"); + + if (!instance) { + dbg("speedtch_usb_ioctl: NULL instance!"); + return -ENODEV; + } + + switch (code) { + case UDSL_IOCTL_LINE_UP: + instance->u.atm_dev->signal = ATM_PHY_SIG_FOUND; + speedtch_got_firmware(instance, 1); + return (instance->u.status == UDSL_LOADED_FIRMWARE) ? 0 : -EIO; + case UDSL_IOCTL_LINE_DOWN: + instance->u.atm_dev->signal = ATM_PHY_SIG_LOST; + return 0; + default: + return -ENOTTY; + } +} + +static int speedtch_usb_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *dev = interface_to_usbdev(intf); + int ifnum = intf->altsetting->desc.bInterfaceNumber; + struct speedtch_instance_data *instance; + unsigned char mac_str[13]; + int ret, i; + char buf7[SIZE_7]; + + dbg("speedtch_usb_probe: trying device with vendor=0x%x, product=0x%x, ifnum %d", + le16_to_cpu(dev->descriptor.idVendor), + le16_to_cpu(dev->descriptor.idProduct), ifnum); + + if ((dev->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) || + (ifnum != 1)) + return -ENODEV; + + dbg("speedtch_usb_probe: device accepted"); + + /* instance init */ + instance = kmalloc(sizeof(*instance), GFP_KERNEL); + if (!instance) { + dbg("speedtch_usb_probe: no memory for instance data!"); + return -ENOMEM; + } + + memset(instance, 0, sizeof(struct speedtch_instance_data)); + + if ((ret = usb_set_interface(dev, 0, 0)) < 0) + goto fail; + + if ((ret = usb_set_interface(dev, 2, 0)) < 0) + goto fail; + + instance->u.data_endpoint = SPEEDTCH_ENDPOINT_DATA; + instance->u.firmware_wait = speedtch_firmware_wait; + instance->u.driver_name = speedtch_driver_name; + + ret = udsl_instance_setup(dev, &instance->u); + if (ret) + goto fail; + + init_timer(&instance->poll_timer); + instance->poll_timer.function = speedtch_timer_poll; + instance->poll_timer.data = (unsigned long)instance; + + INIT_WORK(&instance->poll_work, (void *)speedtch_poll_status, instance); + + /* set MAC address, it is stored in the serial number */ + memset(instance->u.atm_dev->esi, 0, sizeof(instance->u.atm_dev->esi)); + if (usb_string(dev, dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) == 12) { + for (i = 0; i < 6; i++) + instance->u.atm_dev->esi[i] = + (hex2int(mac_str[i * 2]) * 16) + (hex2int(mac_str[i * 2 + 1])); + } + + /* First check whether the modem already seems to be alive */ + ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), + 0x12, 0xc0, 0x07, 0x00, buf7, SIZE_7, 500); + + if (ret == SIZE_7) { + dbg("firmware appears to be already loaded"); + speedtch_got_firmware(instance, 1); + speedtch_poll_status(instance); + } else { + speedtch_firmware_start(instance); + } + + usb_set_intfdata(intf, instance); + + return 0; + + fail: + kfree(instance); + + return -ENOMEM; +} + +static void speedtch_usb_disconnect(struct usb_interface *intf) +{ + struct speedtch_instance_data *instance = usb_get_intfdata(intf); + + dbg("speedtch_usb_disconnect entered"); + + if (!instance) { + dbg("speedtch_usb_disconnect: NULL instance!"); + return; + } + +/*QQ need to handle disconnects on interface #2 while uploading firmware */ +/*QQ and what about interface #1? */ + + if (instance->int_urb) { + struct urb *int_urb = instance->int_urb; + instance->int_urb = NULL; + wmb(); + usb_unlink_urb(int_urb); + usb_free_urb(int_urb); + } + + instance->int_data[0] = 1; + del_timer_sync(&instance->poll_timer); + wmb(); + flush_scheduled_work(); + + udsl_instance_disconnect(&instance->u); + + /* clean up */ + usb_set_intfdata(intf, NULL); + udsl_put_instance(&instance->u); +} + +/*********** +** init ** +***********/ + +static int __init speedtch_usb_init(void) +{ + dbg("speedtch_usb_init: driver version " DRIVER_VERSION); + + return usb_register(&speedtch_usb_driver); +} + +static void __exit speedtch_usb_cleanup(void) +{ + dbg("speedtch_usb_cleanup entered"); + + usb_deregister(&speedtch_usb_driver); +} + +module_init(speedtch_usb_init); +module_exit(speedtch_usb_cleanup); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); diff --git a/drivers/usb/atm/usb_atm.c b/drivers/usb/atm/usb_atm.c new file mode 100644 index 0000000..a4cd447 --- /dev/null +++ b/drivers/usb/atm/usb_atm.c @@ -0,0 +1,1188 @@ +/****************************************************************************** + * usb_atm.c - Generic USB xDSL driver core + * + * Copyright (C) 2001, Alcatel + * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas + * Copyright (C) 2004, David Woodhouse + * + * 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@free.fr) + * + * 1.7+: - See the check-in logs + * + * 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: - 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 +#include +#include + +#include "usb_atm.h" + +#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_VERSION "1.8" +#define DRIVER_DESC "Generic USB ATM/DSL I/O, version " DRIVER_VERSION + +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_param(num_rcv_urbs, uint, 0444); +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_param(num_snd_urbs, uint, 0444); +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_param(num_rcv_bufs, uint, 0444); +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_param(num_snd_bufs, uint, 0444); +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_param(rcv_buf_size, uint, 0444); +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_param(snd_buf_size, uint, 0444); +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) ")"); + +/* ATM */ + +static void udsl_atm_dev_close(struct atm_dev *dev); +static int udsl_atm_open(struct atm_vcc *vcc); +static void udsl_atm_close(struct atm_vcc *vcc); +static int udsl_atm_ioctl(struct atm_dev *dev, unsigned int cmd, void __user * 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, +}; + +/*********** +** misc ** +***********/ + +static inline void udsl_pop(struct atm_vcc *vcc, struct sk_buff *skb) +{ + if (vcc->pop) + vcc->pop(vcc, skb); + else + dev_kfree_skb(skb); +} + +/************* +** 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 *sarb; + struct udsl_vcc_data *vcc_data; + int cached_vci = 0; + unsigned int i; + int pti; + int vci; + short cached_vpi = 0; + short vpi; + + for (i = 0; i < howmany; + i++, source += ATM_CELL_SIZE + instance->rcv_padding) { + 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; + sarb = vcc_data->sarb; + + if (sarb->tail + ATM_CELL_PAYLOAD > sarb->end) { + dbg("udsl_extract_cells: buffer overrun (sarb->len %u, vcc: 0x%p)!", sarb->len, vcc); + /* discard cells already received */ + skb_trim(sarb, 0); + } + + memcpy(sarb->tail, source + ATM_CELL_HEADER, ATM_CELL_PAYLOAD); + __skb_put(sarb, ATM_CELL_PAYLOAD); + + if (pti) { + struct sk_buff *skb; + unsigned int length; + unsigned int pdu_length; + + 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); + atomic_inc(&vcc->stats->rx_err); + goto out; + } + + pdu_length = UDSL_NUM_CELLS(length) * ATM_CELL_PAYLOAD; + + if (sarb->len < pdu_length) { + dbg("udsl_extract_cells: bogus pdu_length %u (sarb->len: %u, vcc: 0x%p)!", pdu_length, sarb->len, vcc); + atomic_inc(&vcc->stats->rx_err); + goto out; + } + + if (crc32_be(~0, sarb->tail - pdu_length, pdu_length) != 0xc704dd7b) { + dbg("udsl_extract_cells: packet failed crc check (vcc: 0x%p)!", vcc); + atomic_inc(&vcc->stats->rx_err); + goto out; + } + + vdbg("udsl_extract_cells: got packet (length: %u, pdu_length: %u, vcc: 0x%p)", length, pdu_length, vcc); + + if (!(skb = dev_alloc_skb(length))) { + dbg("udsl_extract_cells: no memory for skb (length: %u)!", length); + atomic_inc(&vcc->stats->rx_drop); + goto out; + } + + vdbg("udsl_extract_cells: allocated new sk_buff (skb: 0x%p, skb->truesize: %u)", skb, skb->truesize); + + if (!atm_charge(vcc, skb->truesize)) { + dbg("udsl_extract_cells: failed atm_charge (skb->truesize: %u)!", skb->truesize); + dev_kfree_skb(skb); + goto out; /* atm_charge increments rx_drop */ + } + + memcpy(skb->data, sarb->tail - pdu_length, length); + __skb_put(skb, length); + + vdbg("udsl_extract_cells: sending skb 0x%p, skb->len %u, skb->truesize %u", skb, skb->len, skb->truesize); + + PACKETDEBUG(skb->data, skb->len); + + vcc->push(vcc, skb); + + atomic_inc(&vcc->stats->rx); + out: + skb_trim(sarb, 0); + } + } +} + +/************* +** encode ** +*************/ + +static inline void udsl_fill_cell_header(unsigned char *target, struct atm_vcc *vcc) +{ + target[0] = vcc->vpi >> 4; + target[1] = (vcc->vpi << 4) | (vcc->vci >> 12); + target[2] = vcc->vci >> 4; + target[3] = vcc->vci << 4; + target[4] = 0xec; +} + +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->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(struct udsl_instance_data *instance, + 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++) { + udsl_fill_cell_header(target, ctrl->atm_data.vcc); + target += ATM_CELL_HEADER; + memcpy(target, skb->data, ATM_CELL_PAYLOAD); + target += ATM_CELL_PAYLOAD; + if (instance->snd_padding) { + memset(target, 0, instance->snd_padding); + target += instance->snd_padding; + } + __skb_pull(skb, ATM_CELL_PAYLOAD); + } + + ctrl->num_entire -= ne; + + if (!(ctrl->num_cells -= ne) || !(howmany -= ne)) + goto out; + + udsl_fill_cell_header(target, ctrl->atm_data.vcc); + 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; + } + + if (instance->snd_padding) { + memset(target, 0, instance->snd_padding); + target += instance->snd_padding; + } + udsl_fill_cell_header(target, ctrl->atm_data.vcc); + target += ATM_CELL_HEADER; + memset(target, 0, ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER); + target += ATM_CELL_PAYLOAD - ATM_AAL5_TRAILER; + + --ctrl->num_cells; + UDSL_ASSERT(!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; + if (instance->snd_padding) { + memset(target, 0, instance->snd_padding); + target += instance->snd_padding; + } + out: + *target_p = target; + return nc - ctrl->num_cells; +} + +/************** +** receive ** +**************/ + +static void udsl_complete_receive(struct urb *urb, struct pt_regs *regs) +{ + 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 + instance->rcv_padding); + + 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); + + UDSL_ASSERT(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; + + usb_fill_bulk_urb(rcv->urb, instance->usb_dev, + usb_rcvbulkpipe(instance->usb_dev, instance->data_endpoint), + buf->base, + rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding), + udsl_complete_receive, rcv); + + 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, GFP_ATOMIC)) < 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 pt_regs *regs) +{ + struct udsl_instance_data *instance; + struct udsl_sender *snd; + unsigned long flags; + + if (!urb || !(snd = urb->context) || !(instance = snd->instance)) { + dbg("udsl_complete_send: bad urb!"); + return; + } + + 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; + usb_fill_bulk_urb(snd->urb, instance->usb_dev, + usb_sndbulkpipe(instance->usb_dev, instance->data_endpoint), + buf->base, + (snd_buf_size - buf->free_cells) * (ATM_CELL_SIZE + instance->snd_padding), + udsl_complete_send, snd); + + 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, GFP_ATOMIC)) < 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); + if (!instance->current_skb) + 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(instance, 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; + + udsl_pop(vcc, 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); + udsl_pop(vcc, 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; + udsl_pop(vcc, 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; + int err; + + vdbg("udsl_atm_send called (skb 0x%p, len %u)", skb, skb->len); + + if (!instance) { + dbg("udsl_atm_send: NULL data!"); + err = -ENODEV; + goto fail; + } + + if (vcc->qos.aal != ATM_AAL5) { + dbg("udsl_atm_send: unsupported ATM type %d!", vcc->qos.aal); + err = -EINVAL; + goto fail; + } + + if (skb->len > ATM_MAX_AAL5_PDU) { + dbg("udsl_atm_send: packet too long (%d vs %d)!", skb->len, + ATM_MAX_AAL5_PDU); + err = -EINVAL; + goto fail; + } + + PACKETDEBUG(skb->data, skb->len); + + udsl_groom_skb(vcc, skb); + skb_queue_tail(&instance->sndqueue, skb); + tasklet_schedule(&instance->send_tasklet); + + return 0; + + fail: + udsl_pop(vcc, skb); + return err; +} + +/******************** +** bean counting ** +********************/ + +static void udsl_destroy_instance(struct kref *kref) +{ + struct udsl_instance_data *instance = + container_of(kref, struct udsl_instance_data, refcount); + + tasklet_kill(&instance->receive_tasklet); + tasklet_kill(&instance->send_tasklet); + usb_put_dev(instance->usb_dev); + kfree(instance); +} + +void udsl_get_instance(struct udsl_instance_data *instance) +{ + kref_get(&instance->refcount); +} + +void udsl_put_instance(struct udsl_instance_data *instance) +{ + kref_put(&instance->refcount, udsl_destroy_instance); +} + +/********** +** ATM ** +**********/ + +static void udsl_atm_dev_close(struct atm_dev *dev) +{ + struct udsl_instance_data *instance = dev->dev_data; + + dev->dev_data = NULL; + udsl_put_instance(instance); +} + +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->state == USB_STATE_NOTATTACHED) + strcat(page, ", disconnected\n"); + else { + if (instance->status == UDSL_LOADED_FIRMWARE) + strcat(page, ", firmware loaded\n"); + else if (instance->status == UDSL_LOADING_FIRMWARE) + strcat(page, ", firmware loading\n"); + else + strcat(page, ", no firmware\n"); + } + + return strlen(page); + } + + return 0; +} + +static int udsl_atm_open(struct atm_vcc *vcc) +{ + struct udsl_instance_data *instance = vcc->dev->dev_data; + struct udsl_vcc_data *new; + unsigned int max_pdu; + int vci = vcc->vci; + short vpi = vcc->vpi; + int err; + + dbg("udsl_atm_open: vpi %hd, vci %d", vpi, vci); + + if (!instance) { + dbg("udsl_atm_open: NULL data!"); + return -ENODEV; + } + + /* only support AAL5 */ + if ((vcc->qos.aal != ATM_AAL5) || (vcc->qos.rxtp.max_sdu < 0) + || (vcc->qos.rxtp.max_sdu > ATM_MAX_AAL5_PDU)) { + dbg("udsl_atm_open: unsupported ATM type %d!", vcc->qos.aal); + return -EINVAL; + } + + if (instance->firmware_wait && + (err = instance->firmware_wait(instance)) < 0) { + dbg("udsl_atm_open: firmware not loaded (%d)!", err); + return err; + } + + down(&instance->serialize); /* vs self, udsl_atm_close */ + + if (udsl_find_vcc(instance, vpi, vci)) { + dbg("udsl_atm_open: %hd/%d already in use!", vpi, vci); + up(&instance->serialize); + return -EADDRINUSE; + } + + if (!(new = kmalloc(sizeof(struct udsl_vcc_data), GFP_KERNEL))) { + dbg("udsl_atm_open: no memory for vcc_data!"); + up(&instance->serialize); + return -ENOMEM; + } + + memset(new, 0, sizeof(struct udsl_vcc_data)); + new->vcc = vcc; + new->vpi = vpi; + new->vci = vci; + + /* udsl_extract_cells requires at least one cell */ + max_pdu = max(1, UDSL_NUM_CELLS(vcc->qos.rxtp.max_sdu)) * ATM_CELL_PAYLOAD; + if (!(new->sarb = alloc_skb(max_pdu, GFP_KERNEL))) { + dbg("udsl_atm_open: no memory for SAR buffer!"); + kfree(new); + up(&instance->serialize); + return -ENOMEM; + } + + vcc->dev_data = new; + + 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, 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); + + kfree_skb(vcc_data->sarb); + vcc_data->sarb = 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 __user * arg) +{ + switch (cmd) { + case ATM_QUERYLOOP: + return put_user(ATM_LM_NONE, (int __user *)arg) ? -EFAULT : 0; + default: + return -ENOIOCTLCMD; + } +} + +/********** +** USB ** +**********/ + +int udsl_instance_setup(struct usb_device *dev, + struct udsl_instance_data *instance) +{ + char *buf; + int i, length; + + kref_init(&instance->refcount); /* one for USB */ + udsl_get_instance(instance); /* one for ATM */ + + init_MUTEX(&instance->serialize); + + instance->usb_dev = dev; + + INIT_LIST_HEAD(&instance->vcc_list); + + instance->status = UDSL_NO_FIRMWARE; + init_waitqueue_head(&instance->firmware_waiters); + + 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, GFP_KERNEL))) { + 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]); + + buf->base = kmalloc(rcv_buf_size * (ATM_CELL_SIZE + instance->rcv_padding), + GFP_KERNEL); + if (!buf->base) { + 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, GFP_KERNEL))) { + 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]); + + buf->base = kmalloc(snd_buf_size * (ATM_CELL_SIZE + instance->snd_padding), + GFP_KERNEL); + if (!buf->base) { + dbg("udsl_usb_probe: no memory for send buffer %d!", i); + goto fail; + } + + list_add(&buf->list, &instance->spare_send_buffers); + } + + /* ATM init */ + instance->atm_dev = atm_dev_register(instance->driver_name, + &udsl_atm_devops, -1, NULL); + if (!instance->atm_dev) { + 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; + + /* 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 = scnprintf(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; + + usb_get_dev(dev); + + return 0; + + 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); + + return -ENOMEM; +} + +void udsl_instance_disconnect(struct udsl_instance_data *instance) +{ + int i; + + dbg("udsl_instance_disconnect entered"); + + if (!instance) { + dbg("udsl_instance_disconnect: NULL instance!"); + return; + } + + /* receive finalize */ + tasklet_disable(&instance->receive_tasklet); + + for (i = 0; i < num_rcv_urbs; i++) + usb_kill_urb(instance->receivers[i].urb); + + /* 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++) + usb_kill_urb(instance->senders[i].urb); + + /* 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); + + /* ATM finalize */ + shutdown_atm_dev(instance->atm_dev); +} + +EXPORT_SYMBOL_GPL(udsl_get_instance); +EXPORT_SYMBOL_GPL(udsl_put_instance); +EXPORT_SYMBOL_GPL(udsl_instance_setup); +EXPORT_SYMBOL_GPL(udsl_instance_disconnect); + +/*********** +** init ** +***********/ + +static int __init udsl_usb_init(void) +{ + dbg("udsl_usb_init: driver version " DRIVER_VERSION); + + if (sizeof(struct udsl_control) > sizeof(((struct sk_buff *) 0)->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 0; +} + +static void __exit udsl_usb_exit(void) +{ +} + +module_init(udsl_usb_init); +module_exit(udsl_usb_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); + +/************ +** 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 --git a/drivers/usb/atm/usb_atm.h b/drivers/usb/atm/usb_atm.h new file mode 100644 index 0000000..cf8c532 --- /dev/null +++ b/drivers/usb/atm/usb_atm.h @@ -0,0 +1,176 @@ +/****************************************************************************** + * usb_atm.h - Generic USB xDSL driver core + * + * Copyright (C) 2001, Alcatel + * Copyright (C) 2003, Duncan Sands, SolNegro, Josep Comas + * Copyright (C) 2004, David Woodhouse + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + ******************************************************************************/ + +#include +#include +#include +#include +#include +#include + +/* +#define DEBUG +#define VERBOSE_DEBUG +*/ + +#if !defined (DEBUG) && defined (CONFIG_USB_DEBUG) +# define DEBUG +#endif + +#include + +#ifdef DEBUG +#define UDSL_ASSERT(x) BUG_ON(!(x)) +#else +#define UDSL_ASSERT(x) do { if (!(x)) warn("failed assertion '" #x "' at line %d", __LINE__); } while(0) +#endif + +#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 2 +#define UDSL_DEFAULT_SND_URBS 2 +#define UDSL_DEFAULT_RCV_BUFS 4 +#define UDSL_DEFAULT_SND_BUFS 4 +#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */ +#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */ + +#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) + +/* 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 *sarb; +}; + +/* 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 aal5_trailer[ATM_AAL5_TRAILER]; +}; + +#define UDSL_SKB(x) ((struct udsl_control *)(x)->cb) + +/* main driver data */ + +enum udsl_status { + UDSL_NO_FIRMWARE, + UDSL_LOADING_FIRMWARE, + UDSL_LOADED_FIRMWARE +}; + +struct udsl_instance_data { + struct kref refcount; + struct semaphore serialize; + + /* USB device part */ + struct usb_device *usb_dev; + char description[64]; + int data_endpoint; + int snd_padding; + int rcv_padding; + const char *driver_name; + + /* ATM device part */ + struct atm_dev *atm_dev; + struct list_head vcc_list; + + /* firmware */ + int (*firmware_wait) (struct udsl_instance_data *); + enum udsl_status status; + wait_queue_head_t firmware_waiters; + + /* 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; +}; + +extern int udsl_instance_setup(struct usb_device *dev, + struct udsl_instance_data *instance); +extern void udsl_instance_disconnect(struct udsl_instance_data *instance); +extern void udsl_get_instance(struct udsl_instance_data *instance); +extern void udsl_put_instance(struct udsl_instance_data *instance); -- cgit v1.1