EG800G-CN不联网不定位
不联网不定位
出现问题后，adb shell登录到设备，lsusb查看EG800G模块存在，/dev/ttyUSB*设备文件也存在，用microcom发AT指令收不到应答。使用QAndroidLog工具在设备上抓模块日志，抓不到任何日志。
lsusb
# lsusb
Bus 003 Device 001: ID 1d6b:0003
Bus 002 Device 002: ID 2c7c:0904
Bus 001 Device 001: ID 1d6b:0002
Bus 001 Device 004: ID 0781:5591
Bus 002 Device 001: ID 1d6b:0002
ttyUSB
# ls /dev/ttyUSB* -lh
crw-r----- 1 radio radio 188, 0 2025-05-14 17:57 /dev/ttyUSB0
crw-r----- 1 radio radio 188, 1 2010-01-01 08:00 /dev/ttyUSB1
crw-r----- 1 radio radio 188, 2 2010-01-01 08:00 /dev/ttyUSB2
crw-r----- 1 radio radio 188, 3 2010-01-01 08:00 /dev/ttyUSB3
crw-r----- 1 radio radio 188, 4 2010-01-01 08:00 /dev/ttyUSB4
crw-r----- 1 radio radio 188, 5 2010-01-01 08:00 /dev/ttyUSB5
# busybox microcom /dev/ttyUSB4
ATuptime
18:09:16 up 1 day, 59 min, 0 users, load average: 15.27, 15.52, 16.00QAndroidLog
VBUS
QUECTEL EG800G系列硬件设计手册
备注1、在拉低PWRKEY引脚之前，需保证VBAT电压稳定。建议VBAT上电稳定至少30ms后再拉低PWRKEY.
2、如果使用上电自动开机方案，使用AT命令关机后将无法再次自动开机，此时需强制断开VBAT申
源重新上电开机。因此推荐通过开关电路控制PWRKEY引脚的开关机方式。
3、在模块上电之前，需保证VBAT电压低于0.5V。如果使用MOSFET管控制VBAT电源，需设计
放电电路，保证模块关机断电后，VBAT端电压能较快释放。如外围预留看门狗电路，建议通过开
关电路去控制模块的VBAT电源。
4、针对以下两种开机场景需特别注意:* USB VBUS先接入电源(或者一直接入)，VBAT后供电，再拉低PWRKEY开机的场景:需保证VBAT上电稳定后至少2s再执行拉低PWRKEY动作;* VBAT先供电(或者一直有电)，USB_VBUS后接入电源，再拉低PWRKEY开机的场景:需保证USB VBUS接入后至少2s再执行拉低PWRKEY动作。AP log to debug UART
AT+QDBGCFG="tracecfg",0,1
AT+CFUN=1,1usbmon
0516build275内核增加usbmon功能，发现出问题时，bulk in urb请求一直返回-71 EPROTO错误。
-71 EPROTO
# cat /d/usb/usbmon/2u
dac26900 2992224310 S Bi:2:002:8 -115 4096 <
db277d80 2992224338 C Bi:2:002:3 -71 0
db277d80 2992224339 S Bi:2:002:3 -115 4096 <
dac26a80 2992224357 C Bi:2:002:8 -71 0
dac26a80 2992224358 S Bi:2:002:8 -115 4096 <
db277cc0 2992224386 C Bi:2:002:3 -71 0
db277cc0 2992224387 S Bi:2:002:3 -115 4096 <
dac26b40 2992224397 C Bi:2:002:8 -71 0
dac26b40 2992224397 S Bi:2:002:8 -115 4096 <
db277f00 2992224426 C Bi:2:002:3 -71 0
db277f00 2992224427 S Bi:2:002:3 -115 4096 <text
drivers/usb/mon/mon_text.c
mon_text_add
%dt %du %ds
699 int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
700 {
701 struct dentry *d;
702 enum { NAMESZ = 10 };
703 char name[NAMESZ];
704 int busnum = ubus? ubus->busnum: 0;
705 int rc;
706
707 if (mon_dir == NULL)
708 return 0;
709
710 if (ubus != NULL) {
711 rc = snprintf(name, NAMESZ, "%dt", busnum);
712 if (rc <= 0 || rc >= NAMESZ)
713 goto err_print_t;
714 d = debugfs_create_file(name, 0600, mon_dir, mbus,
715 &mon_fops_text_t);
716 if (d == NULL)
717 goto err_create_t;
718 mbus->dent_t = d;
719 }
720
721 rc = snprintf(name, NAMESZ, "%du", busnum);
722 if (rc <= 0 || rc >= NAMESZ)
723 goto err_print_u;
724 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_text_u);
725 if (d == NULL)
726 goto err_create_u;
727 mbus->dent_u = d;
728
729 rc = snprintf(name, NAMESZ, "%ds", busnum);
730 if (rc <= 0 || rc >= NAMESZ)
731 goto err_print_s;
732 d = debugfs_create_file(name, 0600, mon_dir, mbus, &mon_fops_stat);
733 if (d == NULL)
734 goto err_create_s;
735 mbus->dent_s = d;
736
737 return 1;
738
739 err_create_s:
740 err_print_s:
741 debugfs_remove(mbus->dent_u);
742 mbus->dent_u = NULL;
743 err_create_u:
744 err_print_u:
745 if (ubus != NULL) {
746 debugfs_remove(mbus->dent_t);
747 mbus->dent_t = NULL;
748 }
749 err_create_t:
750 err_print_t:
751 return 0;
752 }257 static void mon_text_submit(void *data, struct urb *urb)
258 {
259 struct mon_reader_text *rp = data;
260 mon_text_event(rp, urb, 'S', -EINPROGRESS);
261 }
262
263 static void mon_text_complete(void *data, struct urb *urb, int status)
264 {
265 struct mon_reader_text *rp = data;
266 mon_text_event(rp, urb, 'C', status);
267 }
mon_text_open
349 rp->r.rnf_submit = mon_text_submit;
350 rp->r.rnf_error = mon_text_error;
351 rp->r.rnf_complete = mon_text_complete;
bin
drivers/usb/mon/mon_bin.c
mon_bin_init
1361 int __init mon_bin_init(void)
1362 {
1363 int rc;
1364
1365 mon_bin_class = class_create(THIS_MODULE, "usbmon");
1366 if (IS_ERR(mon_bin_class)) {
1367 rc = PTR_ERR(mon_bin_class);
1368 goto err_class;
1369 }
1370
1371 rc = alloc_chrdev_region(&mon_bin_dev0, 0, MON_BIN_MAX_MINOR, "usbmon");
1372 if (rc < 0)
1373 goto err_dev;
1374
1375 cdev_init(&mon_bin_cdev, &mon_fops_binary);
1376 mon_bin_cdev.owner = THIS_MODULE;
1377
1378 rc = cdev_add(&mon_bin_cdev, mon_bin_dev0, MON_BIN_MAX_MINOR);
1379 if (rc < 0)
1380 goto err_add;
1381
1382 return 0;
1383
1384 err_add:
1385 unregister_chrdev_region(mon_bin_dev0, MON_BIN_MAX_MINOR);
1386 err_dev:
1387 class_destroy(mon_bin_class);
1388 err_class:
1389 return rc;
1390 }QAndroidLog
0611
du -sh
8.1G /data/quectel_debug_log
QGPS
# pm list packages|grep com.mediatek.ygps
package:com.mediatek.ygps
am start com.mediatek.ygps/.YgpsActivity
am start com.ublox.ucenter/.uCenter+QGPS: 1OK
# lsof|grep ttyUSB
rild 478 radio 11u CHR 188,0 0t0 8758 /dev/ttyUSB0
rild 478 radio 19u CHR 188,5 0t0 8793 /dev/ttyUSB5# microcom /dev/ttyUsB4
Quectel
EG800G
Revision:EG800GCNGBR02A03M08
OK+QGPS: 1
OK865005074740047
OKlog
abnormal
ac8257_demo_1g_32:/data/xbin # ./QAndroidLog
[000.000] Version: QLog_Linux_Android_V1.5.30
[000.001] will use filter file: default filter
[000.001] [init_qlog_path] [1860] entry
[000.003] Written 4 bytes
[000.003] [2010] restart entry
[000.109] Find [0] idVendor=2c7c, idProduct=0904, bNumInterfaces=8, ttyDM=/dev/ttyUSB1, ttyGENERAL=/dev/ttyUSB3, ttyTHIRD=, busnum=002, dev=002, usbdevic
e_pah=/sys/bus/usb/devices/2-1
[000.112] open /dev/ttyUSB1 ttyfd = 3
[000.112] open /dev/ttyUSB3 ttyfd = 4
[000.113] Press CTRL+C to stop catch log.
[000.113] catch log via tty port
[000.113] [qlog_handle] entry!
[000.113] unisoc_send_cmd cmd='0'
[000.114] > AT+ARMLOG=1
[003.120] > AT+ARMLOG=1
[006.135] > AT+ARMLOG=1
[009.156] > AT+ARMLOG=1
[012.172] > AT+ARMLOG=1
[015.192] > AT+ARMLOG=1
[018.214] > AT+ARMLOG=1
[021.231] > AT+ARMLOG=1
[024.246] > AT+ARMLOG=1
[027.260] > AT+ARMLOG=1
[030.143] poll() = 0, errno: 2 (No such file or directory)
[030.143] QLog abnormal exit...
[030.143] pthread_join(filter)normal
# ./QAndroidLog
[000.000] Version: QLog_Linux_Android_V1.5.30
[000.000] will use filter file: default filter
[000.000] [init_qlog_path] [1860] entry
[000.001] Written 4 bytes
[000.001] [2010] restart entry
[000.104] Find [0] idVendor=2c7c, idProduct=0904, bNumInterfaces=8, ttyDM=/dev/ttyUSB1, ttyGENERAL=/dev/ttyUSB3, ttyTHIRD=, busnum=002, dev=002, usbdevice_pah=/sys/bus/usb/devices/2-1
[000.106] open /dev/ttyUSB1 ttyfd = 3
[000.107] open /dev/ttyUSB3 ttyfd = 4
[000.107] Press CTRL+C to stop catch log.
[000.107] catch log via tty port
[000.108] [qlog_handle] entry!
[000.109] unisoc_send_cmd cmd='0'
[000.109] > AT+ARMLOG=1
[000.122] kfifo_alloc [0] = 5
[000.122] [qlog_logfile_create][858] qlog_files/2025_06_12_15_38_47_802_0000.logel logfd=5
[000.123] HandleDiagPkt unknow type subtype
[000.123] hexdump size=22
[000.123] 0000:[000.123] 7e[000.123] ff[000.123] ff[000.123] 00[000.123] 00[000.123] 14[000.123] 00[000.123] d1[000.123] 80[000.123] 0f[000.123] 02[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 0f[000.123] 02[000.123] 00[000.123] 00[000.123] 7e[000.123]
[000.123] HandleDiagPkt unknow type subtype
[000.123] hexdump size=22
[000.123] 0000:[000.123] 7e[000.123] ff[000.123] ff[000.123] 00[000.123] 00[000.123] 14[000.123] 00[000.123] d1[000.123] 80[000.123] 0f[000.123] 02[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 00[000.123] 0f[000.123] 02[000.123] 00[000.123] 00[000.123] 7e[000.123]
[000.128] HandleDiagPkt unknow type subtype
[000.128] hexdump size=22
[000.128] 0000:[000.128] 7e[000.128] ff[000.128] ff[000.128] 00[000.128] 00[000.128] 14[000.128] 00[000.128] d1[000.128] 80[000.128] 2b[000.128] 20[000.128] 87[000.128] 6c[000.128] dc[000.128] 00[000.128] 00[000.128] 00[000.128] 3c[000.128] 02[000.128] 00[000.128] 00[000.128] 7e[000.128]
[000.165] fix pkt_len= 32 -> 42
[000.166] fix pkt_len= 92 -> 76
[003.112] > AT+ARMLOG=1
[003.124] HandleDiagPkt unknow type subtype
[003.124] hexdump size=22
[003.124] 0000:[003.124] 7e[003.124] ff[003.124] ff[003.124] 00[003.124] 00[003.124] 14[003.124] 00[003.124] d1[003.124] 80[003.124] 6e[003.124] 3c[003.124] cb[003.124] 64[003.124] 97[003.124] 01[003.124] 00[003.124] 00[003.124] b1[003.124] 18[003.124] 47[003.124] 00[003.124] 7e[003.124]
[003.124] < OK
[005.115] recv time:[5114]
[005.115] recv DM:[0M][2K][0B]
[005.115] recv BIN:[0M][0K][0B]
[010.130] recv time:[10130]
[010.130] recv DM:[0M][5K][0B]
[010.130] recv BIN:[0M][0K][0B]
[015.132] recv time:[15132]
[015.132] recv DM:[0M][7K][0B]
[015.132] recv BIN:[0M][0K][0B]USB Serial Option
Quectel_Linux_USB_Serial_Option_Driver_20220622 v4.9.111
-71 EPROTO
网文
USB xHCI err -71 略解 - xxxdk's blog
文中有如下描述：
在手册 6.4.5 TRB Completion Code 中详细说明了每个错误码的意思。我们看到 value 4 ，USB Transaction Error的描述：“Asserted in the case where the host did not receive a vaild response from the device (Timeout, CRC, Bad PID, unexpected NYET, etc).“ 大意是 “主机未从设备收到有效响应例如超时，CRC错误，错误的PID，意外的NYET等。” 结合上述步骤，我们大概可以确定，两个err -71问题都是设备问题，如果要明确，那就需要抓协议包了。
hub_port_init
drivers/usb/core/hub.c
4898 r = usb_control_msg(udev, usb_rcvaddr0pipe(),
4899 USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
4900 USB_DT_DEVICE << 8, 0,
4901 buf, GET_DESCRIPTOR_BUFSIZE,
4902 initial_descriptor_timeout);
4903 switch (buf->bMaxPacketSize0) {
4904 case 8: case 16: case 32: case 64: case 255:
4905 if (buf->bDescriptorType ==
4906 USB_DT_DEVICE) {
4907 r = 0;
4908 break;
4909 }
4910 /* FALL THROUGH */
4911 default:
4912 #ifdef CONFIG_ATC_AOSP_ENHANCEMENT
4913 #ifdef USB_TEST_MODE_CONFIG
4914 printk("Device No Response\n");
4915 kobject_uevent_env(&udev->dev.kobj, KOBJ_CHANGE, device_no_resp_msg);
4916 #endif
4917 #endif
4918 if (r == 0)
4919 r = -EPROTO;
4920 break;
4921 }musb_host
drivers/misc/mediatek/usb20/musb_host.c
musb_h_ep0_irq
1824 } else if (csr & MUSB_CSR0_H_ERROR) {
1825 #ifdef CONFIG_ATC_AOSP_ENHANCEMENT
1826 printk_ratelimited(KERN_ERR "[MUSB] no response, csr0 %04x\n", csr);
1827 #else
1828 DBG(0, "no response, csr0 %04x\n", csr);
1829 #endif
1830 status = -EPROTO;
1831
1832 } else if (csr & MUSB_CSR0_H_NAKTIMEOUT) {
musb_host_rx
2393 #if defined(CONFIG_ATC_AOSP_ENHANCEMENT) && defined(CONFIG_ATC_USB_HSRX_DISC)
2394 if (musb_disable_disconnect_flag) {
2395 musb_ep_select(mbase, epnum);
2396 if (hw_ep->rx_retry < MUSB_MAX_ERR_RETRIES) {
2397 hw_ep->rx_retry ++;
2398 rx_csr &= ~MUSB_RXCSR_H_ERROR;
2399 musb_writew(hw_ep->regs, MUSB_RXCSR, rx_csr);
2400
2401 musb_h_flush_rxfifo(hw_ep, 0);
2402
2403 rx_csr |= MUSB_RXCSR_H_REQPKT; /* ask packet from the device */
2404 musb_writew(hw_ep->regs, MUSB_RXCSR, rx_csr);
2405 rx_csr = musb_readw(hw_ep->regs, MUSB_RXCSR);
2406 return;
2407 } else {
2408 printk_ratelimited(KERN_ERR "RX CSR error Retry:%d,return -EPROTO \n", hw_ep->rx_retry);
2409 hw_ep->rx_retry = 0;
2410 status = -EPROTO;
2411 }
2412 } else {
2413 status = -EPROTO;
2414 musb_writeb(epio, MUSB_RXINTERVAL, 0);
2415 printk_ratelimited(KERN_ERR "RX error CSR:0x%04x\n", rx_csr);
2416 }
2417 #else2425 } else if (rx_csr & MUSB_RXCSR_DATAERROR) {
2426
2427 if (qh->type != USB_ENDPOINT_XFER_ISOC) {
2428 DBG(0, "RX end %d NAK timeout,rxtoggle=0x%x\n", epnum,
2429 musb_readl(mbase, MUSB_RXTOG));
2430
2431 /* NOTE: NAKing is *NOT* an error, so we want to
2432 * continue. Except ... if there's a request for
2433 * another QH, use that instead of starving it.
2434 *
2435 * Devices like Ethernet and serial adapters keep
2436 * reads posted at all times, which will starve
2437 * other devices without this logic.
2438 */
2439
2440 if (usb_pipebulk(urb->pipe)
2441 && qh->mux == 1
2442 #ifdef CONFIG_ATC_AOSP_ENHANCEMENT
2443 && !list_is_singular(&musb->in_bulk) && (b_is_in_suspend == 0)) {
2444 #else
2445 && !list_is_singular(&musb->in_bulk)) {
2446 #endif
2447 musb_bulk_nak_timeout(musb, hw_ep, 1);
2448 return;
2449 }
2450
2451 musb_ep_select(mbase, epnum);
2452 rx_csr |= MUSB_RXCSR_H_WZC_BITS;
2453 rx_csr &= ~MUSB_RXCSR_DATAERROR;
2454 musb_writew(epio, MUSB_RXCSR, rx_csr);
2455 #ifdef CONFIG_ATC_AOSP_ENHANCEMENT
2456 if(b_is_in_suspend) {
2457 status = -EPROTO;
2458 DBG(0,"b_is_in_suspend force NAK to EPROTO errro\n");
2459 } else {
2460 goto finish;
2461 }
2462 #else2470 } else if (rx_csr & MUSB_RXCSR_INCOMPRX) {
2471 DBG(3, "end %d high bandwidth incomplete ISO packet RX\n"
2472 , epnum);
2473 status = -EPROTO;
2474 }2599 } else if (urb->status == -EINPROGRESS) {
2600 /* if no errors, be sure a packet is ready for unloading */
2601 if (unlikely(!(rx_csr & MUSB_RXCSR_RXPKTRDY))) {
2602 status = -EPROTO;
2603 pr_err("Rx interrupt with no errors or packet!\n");
2604
2605 /* FIXME this is another "SHOULD NEVER HAPPEN" */
2606
2607 /* SCRUB (RX) */
2608 /* do the proper sequence to abort the transfer */
2609 musb_ep_select(mbase, epnum);
2610 val &= ~MUSB_RXCSR_H_REQPKT;
2611 musb_writew(epio, MUSB_RXCSR, val);
2612 goto finish;
2613 }DBG
drivers/misc/mediatek/usb20/musb_debug.h
78 #define DBG(level, fmt, args...) xprintk(level, fmt, ## args)
_dbg_level
66 extern unsigned int musb_debug;67 extern unsigned int musb_debug_limit;68 extern unsigned int musb_uart_debug;6970 static inline int _dbg_level(unsigned int level)71 {72 return level <= musb_debug;73 }xprintk
54 #define xprintk(level, format, args...) do { \55 if (_dbg_level(level)) { \56 if (musb_uart_debug) {\57 pr_notice("[MUSB]%s %d: " format, \58 __func__, __LINE__, ## args); \59 } \60 else{\61 pr_debug("[MUSB]%s %d: " format, \62 __func__, __LINE__, ## args); \63 } \64 } } while (0)musb_debug
drivers/misc/mediatek/usb20/musb_core.c
203 unsigned int musb_debug;204 unsigned int musb_debug_limit = 1;205 unsigned int musb_uart_debug = 1;245 module_param_named(debug, musb_debug, uint, 0644);246 MODULE_PARM_DESC(debug, "Debug message level. Default = 0");247 module_param_named(debug_limit, musb_debug_limit, uint, 0644);248 module_param_named(dbg_uart, musb_uart_debug, uint, 0644);
module parameter
/sys/module/musb_hdrc/parametersdebug 0debug_limit 1dbg_uart 1xhci
drivers/usb/host/xhci.c
xhci_setup_device
3929 case COMP_TX_ERR:
3930 dev_warn(&udev->dev, "Device not responding to setup %s.\n", act);
3931 ret = -EPROTO;
3932 break;
drivers/usb/host/xhci-ring.c
process_isoc_td
2112 case COMP_DEV_ERR:
2113 case COMP_STALL:
2114 frame->status = -EPROTO;
2115 skip_td = true;
2116 break;
2117 case COMP_TX_ERR:
2118 frame->status = -EPROTO;
2119 if (event_trb != td->last_trb)
2120 return 0;
2121 skip_td = true;
2122 break;
handle_tx_event (*)
2415 case COMP_SPLIT_ERR:
2416 case COMP_TX_ERR:
2417 xhci_dbg(xhci, "Transfer error on endpoint\n");
2418 status = -EPROTO;
2419 break;
2455 case COMP_DEV_ERR:
2456 xhci_warn(xhci, "WARN: detect an incompatible device");
2457 status = -EPROTO;
2458 break;
# ls /sys/bus/usb/devices/ -l
total 0
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 1-0:1.0 -> ../../../devices/platform/mt_usb/musb-hdrc/usb1/1-0:1.0
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 2-0:1.0 -> ../../../devices/platform/11280000.usb/usb2/2-0:1.0
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 3-0:1.0 -> ../../../devices/platform/11280000.usb/usb3/3-0:1.0
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 usb1 -> ../../../devices/platform/mt_usb/musb-hdrc/usb1
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 usb2 -> ../../../devices/platform/11280000.usb/usb2
lrwxrwxrwx 1 root root 0 2025-06-25 10:22 usb3 -> ../../../devices/platform/11280000.usb/usb3xhci-mtk
# ls /sys/devices/platform/11280000.usb/driver -l
lrwxrwxrwx 1 root root 0 2025-06-25 10:24 /sys/devices/platform/11280000.usb/driver -> ../../../bus/platform/drivers/xhci-mtkdevice-tree
# ls /proc/device-tree/usb@11280000/
clock-names clocks compatible gpio_vbus interrupts linux,phandle name phandle reg reg-namesxhci.h
1731 #define xhci_dbg(xhci, fmt, args...) \
1732 dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1733 #define xhci_err(xhci, fmt, args...) \
1734 dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1735 #define xhci_warn(xhci, fmt, args...) \
1736 dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1737 #define xhci_warn_ratelimited(xhci, fmt, args...) \
1738 dev_warn_ratelimited(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
1739 #define xhci_info(xhci, fmt, args...) \
1740 dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
xhci_transfer_event
1053 struct xhci_transfer_event {
1054 /* 64-bit buffer address, or immediate data */
1055 __le64 buffer;
1056 __le32 transfer_len;
1057 /* This field is interpreted differently based on the type of TRB */
1058 __le32 flags;
1059 };dynamic_debug
cat /d/dynamic_debug/control |grep xhciecho "func handle_tx_event +p" > /d/dynamic_debug/control
echo "func handle_tx_event -p" > /d/dynamic_debug/control
echo "func handle_tx_event =p" > /d/dynamic_debug/controlecho "module xhci_hcd +p" > /d/dynamic_debug/controlecho "file usb_wwan.c +p" > /d/dynamic_debug/control
echo "func usb_wwan_indat_callback +p" > /d/dynamic_debug/control
echo "func usb_wwan_write +p" > /d/dynamic_debug/control
xhci_irq
xhci-ring.c
xhci_irqxhci_handle_eventhandle_cmd_completionhandle_port_statushandle_tx_eventskip_isoc_tdprocess_ctrl_tdfinish_tdprocess_isoc_tdprocess_bulk_intr_tdhandle_device_notificationhandle_vendor_eventusb_serial_driver option
drivers/usb/serial/option.c
1974 static struct usb_serial_driver option_1port_device = {
1975 .driver = {
1976 .owner = THIS_MODULE,
1977 .name = "option1",
1978 },
1979 .description = "GSM modem (1-port)",
1980 .id_table = option_ids,
1981 .num_ports = 1,
1982 .probe = option_probe,
1983 .open = usb_wwan_open,
1984 .close = usb_wwan_close,
1985 .dtr_rts = usb_wwan_dtr_rts,
1986 .write = usb_wwan_write,
1987 .write_room = usb_wwan_write_room,
1988 .chars_in_buffer = usb_wwan_chars_in_buffer,
1989 .tiocmget = usb_wwan_tiocmget,
1990 .tiocmset = usb_wwan_tiocmset,
1991 .ioctl = usb_wwan_ioctl,
1992 .attach = option_attach,
1993 .release = option_release,
1994 .port_probe = usb_wwan_port_probe,
1995 .port_remove = usb_wwan_port_remove,
1996 .read_int_callback = option_instat_callback,
1997 #ifdef CONFIG_PM
1998 .suspend = usb_wwan_suspend,
1999 .resume = usb_wwan_resume,
2000 #if 1 //Added by Quectel
2001 .reset_resume = usb_wwan_resume,
2002 #endif
2003 #endif
2004 };usb_wwan
drivers/usb/serial/usb_wwan.c
usb_wwan_send_setup
usb_wwan_dtr_rts
usb_wwan_tiocmget
usb_wwan_tiocmset
get_serial_info
set_serial_info
usb_wwan_ioctl
usb_wwan_write
usb_wwan_indat_callback
usb_wwan_outdat_callback
usb_wwan_write_room
usb_wwan_chars_in_buffer
usb_wwan_open
unbusy_queued_urb
usb_wwan_close
usb_wwan_setup_urb
usb_wwan_port_probe
usb_wwan_port_remove
stop_urbs
usb_wwan_suspend
usb_wwan_submit_delayed_urbs
usb_wwan_resume524 int usb_wwan_port_probe(struct usb_serial_port *port)
525 {
526 struct usb_wwan_port_private *portdata;
527 struct urb *urb;
528 u8 *buffer;
529 int i;
530
531 if (!port->bulk_in_size || !port->bulk_out_size)
532 return -ENODEV;
533
534 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
535 if (!portdata)
536 return -ENOMEM;
537
538 init_usb_anchor(&portdata->delayed);
539
540 for (i = 0; i < N_IN_URB; i++) {
541 buffer = (u8 *)__get_free_page(GFP_KERNEL);
542 if (!buffer)
543 goto bail_out_error;
544 portdata->in_buffer[i] = buffer;
545
546 urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress,
547 USB_DIR_IN, port,
548 buffer, IN_BUFLEN,
549 usb_wwan_indat_callback);
550 portdata->in_urbs[i] = urb;
551 }
552
553 for (i = 0; i < N_OUT_URB; i++) {
554 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
555 if (!buffer)
556 goto bail_out_error2;
557 portdata->out_buffer[i] = buffer;
558
559 urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress,
560 USB_DIR_OUT, port,
561 buffer, OUT_BUFLEN,
562 usb_wwan_outdat_callback);
563 portdata->out_urbs[i] = urb;
564 }
565
566 usb_set_serial_port_data(port, portdata);
567
568 return 0;
569
570 bail_out_error2:
571 for (i = 0; i < N_OUT_URB; i++) {
572 usb_free_urb(portdata->out_urbs[i]);
573 kfree(portdata->out_buffer[i]);
574 }
575 bail_out_error:
576 for (i = 0; i < N_IN_URB; i++) {
577 usb_free_urb(portdata->in_urbs[i]);
578 free_page((unsigned long)portdata->in_buffer[i]);
579 }
580 kfree(portdata);
581
582 return -ENOMEM;
583 }
584 EXPORT_SYMBOL_GPL(usb_wwan_port_probe);BUFLEN
29 #define N_IN_URB 430 #define N_OUT_URB 431 #define IN_BUFLEN 409632 #define OUT_BUFLEN 4096usb_wwan_indat_callback
292 static void usb_wwan_indat_callback(struct urb *urb)
293 {
294 int err;
295 int endpoint;
296 struct usb_serial_port *port;
297 struct device *dev;
298 unsigned char *data = urb->transfer_buffer;
299 int status = urb->status;
300
301 endpoint = usb_pipeendpoint(urb->pipe);
302 port = urb->context;
303 dev = &port->dev;
304
305 if (status) {
306 dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
307 __func__, status, endpoint);
308 } else {
309 if (urb->actual_length) {
310 tty_insert_flip_string(&port->port, data,
311 urb->actual_length);
312 tty_flip_buffer_push(&port->port);
313 } else
314 dev_dbg(dev, "%s: empty read urb received\n", __func__);
315 }
316 /* Resubmit urb so we continue receiving */
317 err = usb_submit_urb(urb, GFP_ATOMIC);
318 if (err) {
319 if (err != -EPERM && err != -ENODEV) {
320 dev_err(dev, "%s: resubmit read urb failed. (%d)\n",
321 __func__, err);
322 /* busy also in error unless we are killed */
323 usb_mark_last_busy(port->serial->dev);
324 }
325 } else {
326 usb_mark_last_busy(port->serial->dev);
327 }
328 }USB Protocol Analyzer
LeCroy
TELEDYNE LECROY Advisor T3
Traffic Summary Report
| data | End Date & Time | Elapsed Time | Packets | Transactions | Transfers | |
| 06_30_14_21_20 | 06-30 14:21:21 | 13:10 | 1023.50MB | 53602934 | 26660632 | 399 |
| 06_30_15_00_06 | 07-01 13:53:40 | 22:53:33 | 2.0GB | 107203897 | 53320077 | 1186 |
| 07_01_16_34_09 | 07-01 16:34:10 | 02:02 | 420.98MB | 18392958 | 17416482 | 15 |
Search
| Go to Packet/Transaction/Transfer | Ctrl+G | |
| Go to USB 2.0 | PID | |
| ANY Error/Warning | Ctrl+Shift+2 | |
| Specific Errors/Warnings | ||
| Data Length | ||
| Addr & Endp | ||
| Transfer Type | ||
| Find ... | Ctrl+F | |
| Find Next | F3 |
Isoch?
协议分析软件，把没有NAK ACK STALL的传输，显示成isoch。
bus utilization
/d/usb/devices
# cat /d/usb/devicesT: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 4.09
S: Manufacturer=Linux 4.9.117+ musb-hcd
S: Product=MUSB HDRC host driver
S: SerialNumber=musb-hdrc
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256msT: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 4.09
S: Manufacturer=Linux 4.9.117+ xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=11280000.usb
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256msT: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 8 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=2c7c ProdID=0904 Rev= 3.18
S: Manufacturer=Android
S: Product=Android
C:* #Ifs= 8 Cfg#= 1 Atr=e0 MxPwr=400mA
A: FirstIf#= 0 IfCount= 2 Cls=02(comm.) Sub=06 Prot=00
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=cdc_ether
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=32ms
I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
I:* If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 7 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 8 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
E: Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=07(O) Atr=02(Bulk) MxPS= 512 Ivl=0msT: Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=10000 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 3.10 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=1d6b ProdID=0003 Rev= 4.09
S: Manufacturer=Linux 4.9.117+ xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=11280000.usb
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256msdevice number
24_0624:01-01 08:00:03.710 I/[ 0.981642](0)[212:kworker/0:2]usb 2-1( 212): new high-speed USB device number 2 using xhci-mtk
24_0624:01-01 08:07:47.732 I/[ 465.004020](2)[3508:kworker/2:3]usb 2-1( 3508): USB disconnect, device number 2
24_0624:01-01 08:07:49.560 I/[ 466.831631](0)[4000:kworker/0:0]usb 2-1( 4000): new high-speed USB device number 3 using xhci-mtk
24_0630:01-07 00:33:33.755 I/[491611.026551](2)[18486:kworker/2:3]usb 2-1(18486): USB disconnect, device number 3
24_0630:01-07 01:00:53.056 I/[493250.327517](0)[25804:kworker/0:2]usb 2-1(25804): new high-speed USB device number 4 using xhci-mtk
24_0630:01-07 01:01:18.442 I/[493275.713316](1)[22008:kworker/1:0]usb 2-1(22008): USB disconnect, device number 4
24_0630:01-07 01:29:54.475 I/[494991.747136](2)[4189:kworker/2:1]usb 2-1( 4189): new high-speed USB device number 5 using xhci-mtk
24_0630:01-07 01:32:04.824 I/[495122.095299](1)[22008:kworker/1:0]usb 2-1(22008): USB disconnect, device number 5
24_0630:01-07 01:37:53.105 I/[495470.377075](2)[4189:kworker/2:1]usb 2-1( 4189): new high-speed USB device number 6 using xhci-mtk
24_0630:01-07 01:37:56.512 I/[495473.783283](1)[22008:kworker/1:0]usb 2-1(22008): USB disconnect, device number 6
24_0630:01-07 01:38:01.056 I/[495478.327378](1)[22008:kworker/1:0]usb 2-1(22008): new high-speed USB device number 7 using xhci-mtk
24_0630:01-07 02:17:02.559 I/[497819.830536](2)[14321:kworker/2:3]usb 2-1(14321): USB disconnect, device number 7
24_0630:01-07 02:19:17.705 I/[497954.976622](2)[14321:kworker/2:3]usb 2-1(14321): new high-speed USB device number 8 using xhci-mtkUSB Device Tree Viewer
=========================== USB Port4 ===========================Connection Status : 0x01 (Device is connected)
Port Chain : 1-4
Properties : 0x01IsUserConnectable : yesPortIsDebugCapable : noPortHasMultiCompanions : noPortConnectorIsTypeC : no
ConnectionIndex : 4
CompanionIndex : 0CompanionHubSymLnk : USB#ROOT_HUB30#4&3a727aa6&0&0#{f18a0e88-c30c-11d0-8815-00a0c906bed8}CompanionPortNumber : 14======================== USB Device ========================+++++++++++++++++ Device Information ++++++++++++++++++
Device Description : QUSB Composite Device
Device Path : \\.\usb#vid_2c7c&pid_0904#5&299674b&0&4#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Device ID : USB\VID_2C7C&PID_0904\5&299674B&0&4
Hardware IDs : USB\VID_2C7C&PID_0904&REV_0318 USB\VID_2C7C&PID_0904
Driver KeyName : {36fc9e60-c465-11cf-8056-444553540000}\0020 (GUID_DEVCLASS_USB)
Driver : C:\WINDOWS\System32\drivers\usbccgp.sys (Version: 10.0.26100.3912 Date: 2025-05-21)
Driver Inf : C:\WINDOWS\inf\oem60.inf
Legacy BusType : PNPBus
Class : USB
Class GUID : {36fc9e60-c465-11cf-8056-444553540000} (GUID_DEVCLASS_USB)
Interface GUID : {a5dcbf10-6530-11d2-901f-00c04fb951ed} (GUID_DEVINTERFACE_USB_DEVICE)
Service : usbccgp
Enumerator : USB
Location Info : Port_#0004.Hub_#0002
Location IDs : PCIROOT(0)#PCI(1400)#USBROOT(0)#USB(4), ACPI(_SB_)#ACPI(PC00)#ACPI(XHCI)#ACPI(RHUB)#ACPI(HS04)
Container ID : {674c5216-5007-11f0-9464-c8cb9e2f2e56}
Manufacturer Info : (Standard system devices)
Capabilities : 0x84 (Removable, SurpriseRemovalOK)
Status : 0x0180600A (DN_DRIVER_LOADED, DN_STARTED, DN_DISABLEABLE, DN_REMOVABLE, DN_NT_ENUMERATOR, DN_NT_DRIVER)
Problem Code : 0
Upper Filters : ew_usbenumfilter
Address : 4
Power State : D0 (supported: D0, D1, D2, D3, wake from D0, wake from D1, wake from D2)Child Device 1 : 基于远程 NDIS 的 Internet 共享设备Device ID : USB\VID_2C7C&PID_0904&MI_00\6&34686A7D&7&0000Class : NetChild Device 2 : Quectel USB AT PortDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0002Class : PortsCOM-Port : COM24 (\Device\usbcommIOT_serial1)Child Device 3 : Quectel USB DIAG PortDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0003Class : PortsCOM-Port : COM23 (\Device\usbcommIOT_serial2)Child Device 4 : Quectel USB Debug Host PortDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0004Class : PortsCOM-Port : COM22 (\Device\usbcommIOT_serial3)Child Device 5 : Quectel USB CP Log PortDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0005Class : PortsCOM-Port : COM21 (\Device\usbcommIOT_serial4)Child Device 6 : Quectel USB ModemDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0007Class : ModemCOM-Port : COM18 (\Device\sprd_usbcomm_modem1)Child Device 7 : Quectel USB NMEA PortDevice ID : USB\VID_2C7C&SUBCLASS_00&PROT_00\6&34686A7D&7&0008Class : PortsCOM-Port : COM25 (\Device\usbcommIOT_serial5)---------------- Connection Information ---------------
Connection Index : 0x04 (4)
Connection Status : 0x01 (DeviceConnected)
Current Config Value : 0x01
Device Address : 0x2B (43)
Is Hub : 0x00 (no)
Number Of Open Pipes : 0x0F (15)
Device Bus Speed : 0x02 (High-Speed)
Pipe0ScheduleOffset : 0x00 (0)
Pipe1ScheduleOffset : 0x00 (0)
Pipe2ScheduleOffset : 0x00 (0)
Pipe3ScheduleOffset : 0x00 (0)
Pipe4ScheduleOffset : 0x00 (0)
Pipe5ScheduleOffset : 0x00 (0)
Pipe6ScheduleOffset : 0x00 (0)
Pipe7ScheduleOffset : 0x00 (0)
Pipe8ScheduleOffset : 0x00 (0)
Pipe9ScheduleOffset : 0x00 (0)
Pipe10ScheduleOffset : 0x00 (0)
Pipe11ScheduleOffset : 0x00 (0)
Pipe12ScheduleOffset : 0x00 (0)
Pipe13ScheduleOffset : 0x00 (0)
Pipe14ScheduleOffset : 0x00 (0)--------------- Connection Information V2 -------------
Connection Index : 0x04 (4)
Length : 0x10 (16 bytes)
SupportedUsbProtocols : 0x03Usb110 : 1 (yes)Usb200 : 1 (yes)Usb300 : 0 (no)ReservedMBZ : 0x00
Flags : 0x00DevIsOpAtSsOrHigher : 0 (Is not operating at SuperSpeed or higher)DevIsSsCapOrHigher : 0 (Is not SuperSpeed capable or higher)DevIsOpAtSsPlusOrHigher : 0 (Is not operating at SuperSpeedPlus or higher)DevIsSsPlusCapOrHigher : 0 (Is not SuperSpeedPlus capable or higher)ReservedMBZ : 0x00------------------ Device Descriptor ------------------
bLength : 0x12 (18 bytes)
bDescriptorType : 0x01 (Device Descriptor)
bcdUSB : 0x200 (USB Version 2.00)
bDeviceClass : 0x00 (defined by the interface descriptors)
bDeviceSubClass : 0x00
bDeviceProtocol : 0x00
bMaxPacketSize0 : 0x40 (64 bytes)
idVendor : 0x2C7C
idProduct : 0x0904
bcdDevice : 0x0318
iManufacturer : 0x01 (String Descriptor 1)Language 0x0409 : "Android"
iProduct : 0x02 (String Descriptor 2)Language 0x0409 : "Android"
iSerialNumber : 0x03 (String Descriptor 3)
bNumConfigurations : 0x01------------------ String Descriptors ----------------------- String Descriptor 0 ------
bLength : 0x04 (4 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language ID[0] : 0x0409 (English - United States)------ String Descriptor 1 ------
bLength : 0x10 (16 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "Android"------ String Descriptor 2 ------
bLength : 0x10 (16 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "Android"------ String Descriptor 4 ------
bLength : 0x3A (58 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "RNDIS Communications Control"------ String Descriptor 5 ------
bLength : 0x28 (40 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "RNDIS Ethernet Data"------ String Descriptor 6 ------
bLength : 0x0C (12 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "RNDIS"------ String Descriptor 7 ------
bLength : 0x2C (44 bytes)
bDescriptorType : 0x03 (String Descriptor)
Language 0x0409 : "Mobile Generic Serial"---------------- Configuration Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x02 (Configuration Descriptor)
wTotalLength : 0x00D5 (213 bytes)
bNumInterfaces : 0x08
bConfigurationValue : 0x01
iConfiguration : 0x00 (No String Descriptor)
bmAttributes : 0xE0D7: Reserved, set 1 : 0x01D6: Self Powered : 0x01 (yes)D5: Remote Wakeup : 0x01 (yes)D4..0: Reserved, set 0 : 0x00
MaxPower : 0xC8 (400 mA)------------------- IAD Descriptor --------------------
bLength : 0x08 (8 bytes)
bDescriptorType : 0x0B
bFirstInterface : 0x00
bInterfaceCount : 0x02
bFunctionClass : 0xE0 (Wireless Controller)
bFunctionSubClass : 0x01
bFunctionProtocol : 0x03
iFunction : 0x06 (String Descriptor 6)Language 0x0409 : "RNDIS"---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x00
bAlternateSetting : 0x00
bNumEndpoints : 0x01 (1 Endpoint)
bInterfaceClass : 0xE0 (Wireless Controller)
bInterfaceSubClass : 0x01
bInterfaceProtocol : 0x03 (Remote NDIS)
iInterface : 0x04 (String Descriptor 4)Language 0x0409 : "RNDIS Communications Control"----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 00 10 01 ----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 01 00 01 ----------------- Unknown Descriptor ------------------
bLength : 0x04 (4 bytes)
bDescriptorType : 0x24
Data (HexDump) : 04 24 02 00 ----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 06 00 01 ----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x82 (Direction=IN EndpointID=2)
bmAttributes : 0x03 (TransferType=Interrupt)
wMaxPacketSize : 0x0008Bits 15..13 : 0x00 (reserved, must be zero)Bits 12..11 : 0x00 (0 additional transactions per microframe -> allows 1..1024 bytes per packet)Bits 10..0 : 0x08 (8 bytes per packet)
bInterval : 0x10 (16 ms)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x01
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0x0A (CDC-Data)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x05 (String Descriptor 5)Language 0x0409 : "RNDIS Ethernet Data"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x81 (Direction=IN EndpointID=1)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x01 (Direction=OUT EndpointID=1)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x02
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x83 (Direction=IN EndpointID=3)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x02 (Direction=OUT EndpointID=2)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x03
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x84 (Direction=IN EndpointID=4)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x03 (Direction=OUT EndpointID=3)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x04
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x85 (Direction=IN EndpointID=5)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x04 (Direction=OUT EndpointID=4)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x05
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x86 (Direction=IN EndpointID=6)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x05 (Direction=OUT EndpointID=5)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x07
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x87 (Direction=IN EndpointID=7)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x06 (Direction=OUT EndpointID=6)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x08
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x88 (Direction=IN EndpointID=8)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x07 (Direction=OUT EndpointID=7)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Configuration Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x02 (Configuration Descriptor)
wTotalLength : 0x00D5 (213 bytes)
bNumInterfaces : 0x08
bConfigurationValue : 0x01
iConfiguration : 0x00 (No String Descriptor)
bmAttributes : 0xE0D7: Reserved, set 1 : 0x01D6: Self Powered : 0x01 (yes)D5: Remote Wakeup : 0x01 (yes)D4..0: Reserved, set 0 : 0x00
MaxPower : 0xC8 (400 mA)------------------- IAD Descriptor --------------------
bLength : 0x08 (8 bytes)
bDescriptorType : 0x0B
bFirstInterface : 0x00
bInterfaceCount : 0x02
bFunctionClass : 0xE0 (Wireless Controller)
bFunctionSubClass : 0x01
bFunctionProtocol : 0x03
iFunction : 0x06 (String Descriptor 6)Language 0x0409 : "RNDIS"---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x00
bAlternateSetting : 0x00
bNumEndpoints : 0x01 (1 Endpoint)
bInterfaceClass : 0xE0 (Wireless Controller)
bInterfaceSubClass : 0x01
bInterfaceProtocol : 0x03 (Remote NDIS)
iInterface : 0x04 (String Descriptor 4)Language 0x0409 : "RNDIS Communications Control"----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 00 10 01 ----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 01 00 01 ----------------- Unknown Descriptor ------------------
bLength : 0x04 (4 bytes)
bDescriptorType : 0x24
Data (HexDump) : 04 24 02 00 ----------------- Unknown Descriptor ------------------
bLength : 0x05 (5 bytes)
bDescriptorType : 0x24
Data (HexDump) : 05 24 06 00 01 ----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x82 (Direction=IN EndpointID=2)
bmAttributes : 0x03 (TransferType=Interrupt)
wMaxPacketSize : 0x0008Bits 15..13 : 0x00 (reserved, must be zero)Bits 12..11 : 0x00 (0 additional transactions per microframe -> allows 1..1024 bytes per packet)Bits 10..0 : 0x08 (8 bytes per packet)
bInterval : 0x10 (16 ms)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x01
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0x0A (CDC-Data)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x05 (String Descriptor 5)Language 0x0409 : "RNDIS Ethernet Data"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x81 (Direction=IN EndpointID=1)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x01 (Direction=OUT EndpointID=1)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x02
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x83 (Direction=IN EndpointID=3)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x02 (Direction=OUT EndpointID=2)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x03
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x84 (Direction=IN EndpointID=4)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x03 (Direction=OUT EndpointID=3)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x04
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x85 (Direction=IN EndpointID=5)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x04 (Direction=OUT EndpointID=4)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x05
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x86 (Direction=IN EndpointID=6)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x05 (Direction=OUT EndpointID=5)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x07
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x87 (Direction=IN EndpointID=7)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x06 (Direction=OUT EndpointID=6)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)---------------- Interface Descriptor -----------------
bLength : 0x09 (9 bytes)
bDescriptorType : 0x04 (Interface Descriptor)
bInterfaceNumber : 0x08
bAlternateSetting : 0x00
bNumEndpoints : 0x02 (2 Endpoints)
bInterfaceClass : 0xFF (Vendor Specific)
bInterfaceSubClass : 0x00
bInterfaceProtocol : 0x00
iInterface : 0x07 (String Descriptor 7)Language 0x0409 : "Mobile Generic Serial"----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x88 (Direction=IN EndpointID=8)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never NAKs)----------------- Endpoint Descriptor -----------------
bLength : 0x07 (7 bytes)
bDescriptorType : 0x05 (Endpoint Descriptor)
bEndpointAddress : 0x07 (Direction=OUT EndpointID=7)
bmAttributes : 0x02 (TransferType=Bulk)
wMaxPacketSize : 0x0200 (max 512 bytes)
bInterval : 0x00 (never -71 EPROTO日志
usb_wwan
出现问题时，xhci中断每秒2万次，打开usb_wwan的动态调试可以看到日志。
echo "func usb_wwan_indat_callback +p" > /d/dynamic_debug/controloption1 ttyUSB0: usb_wwan_indat_callback: nonzero status: -71 on endpoint 03.
option1 ttyUSB5: usb_wwan_indat_callback: nonzero status: -71 on endpoint 08.usbnet
rx_complete
接收错误超过20/30，暂停125毫秒。
rx_submitusb_fill_bulk_urbrx_complete-EPROTO stats.rx_errors++ 69 // reawaken network queue this soon after stopping; else watchdog barks70 #define TX_TIMEOUT_JIFFIES (5*HZ)7172 /* throttle rx/tx briefly after some faults, so hub_wq might disconnect()73 * us (it polls at HZ/4 usually) before we report too many false errors.74 */75 #define THROTTLE_JIFFIES (HZ/8)7677 // between wakeups78 #define UNLINK_TIMEOUT_MS 3580 static void rx_complete (struct urb *urb)581 {582 struct sk_buff *skb = (struct sk_buff *) urb->context;583 struct skb_data *entry = (struct skb_data *) skb->cb;584 struct usbnet *dev = entry->dev;585 int urb_status = urb->status;586 enum skb_state state;587588 skb_put (skb, urb->actual_length);589 state = rx_done;590 entry->urb = NULL;591592 switch (urb_status) {593 /* success */594 case 0:595 break;596597 /* stalls need manual reset. this is rare ... except that598 * when going through USB 2.0 TTs, unplug appears this way.599 * we avoid the highspeed version of the ETIMEDOUT/EILSEQ600 * storm, recovering as needed.601 */602 case -EPIPE:603 dev->net->stats.rx_errors++;604 usbnet_defer_kevent (dev, EVENT_RX_HALT);605 // FALLTHROUGH606607 /* software-driven interface shutdown */608 case -ECONNRESET: /* async unlink */609 case -ESHUTDOWN: /* hardware gone */610 netif_dbg(dev, ifdown, dev->net,611 "rx shutdown, code %d\n", urb_status);612 goto block;613614 /* we get controller i/o faults during hub_wq disconnect() delays.615 * throttle down resubmits, to avoid log floods; just temporarily,616 * so we still recover when the fault isn't a hub_wq delay.617 */618 case -EPROTO:619 case -ETIME:620 case -EILSEQ:621 dev->net->stats.rx_errors++;622 if (!timer_pending (&dev->delay)) {623 mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);624 netif_dbg(dev, link, dev->net,625 "rx throttle %d\n", urb_status);626 }627 block:628 state = rx_cleanup;629 entry->urb = urb;630 urb = NULL;631 break;632633 /* data overrun ... flush fifo? */634 case -EOVERFLOW:635 dev->net->stats.rx_over_errors++;636 // FALLTHROUGH637638 default:639 state = rx_cleanup;640 dev->net->stats.rx_errors++;641 netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status);642 break;643 }644645 /* stop rx if packet error rate is high */646 if (++dev->pkt_cnt > 30) {647 dev->pkt_cnt = 0;648 dev->pkt_err = 0;649 } else {650 if (state == rx_cleanup)651 dev->pkt_err++;652 if (dev->pkt_err > 20)653 set_bit(EVENT_RX_KILL, &dev->flags);654 }655656 state = defer_bh(dev, skb, &dev->rxq, state);657658 if (urb) {659 if (netif_running (dev->net) &&660 !test_bit (EVENT_RX_HALT, &dev->flags) &&661 state != unlink_start) {662 rx_submit (dev, urb, GFP_ATOMIC);663 usb_mark_last_busy(dev->udev);664 return;665 }666 usb_free_urb (urb);667 }668 netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n");669 }rx shutdown, code %d
rx status %d
no read resubmittedtx_complete
发送错误，暂停125毫秒。
usbnet_start_xmittx_complete-EPROTO netif_stop_queue1212 static void tx_complete (struct urb *urb)
1213 {
1214 struct sk_buff *skb = (struct sk_buff *) urb->context;
1215 struct skb_data *entry = (struct skb_data *) skb->cb;
1216 struct usbnet *dev = entry->dev;
1217
1218 if (urb->status == 0) {
1219 dev->net->stats.tx_packets += entry->packets;
1220 dev->net->stats.tx_bytes += entry->length;
1221 } else {
1222 dev->net->stats.tx_errors++;
1223
1224 switch (urb->status) {
1225 case -EPIPE:
1226 usbnet_defer_kevent (dev, EVENT_TX_HALT);
1227 break;
1228
1229 /* software-driven interface shutdown */
1230 case -ECONNRESET: // async unlink
1231 case -ESHUTDOWN: // hardware gone
1232 break;
1233
1234 /* like rx, tx gets controller i/o faults during hub_wq
1235 * delays and so it uses the same throttling mechanism.
1236 */
1237 case -EPROTO:
1238 case -ETIME:
1239 case -EILSEQ:
1240 usb_mark_last_busy(dev->udev);
1241 if (!timer_pending (&dev->delay)) {
1242 mod_timer (&dev->delay,
1243 jiffies + THROTTLE_JIFFIES);
1244 netif_dbg(dev, link, dev->net,
1245 "tx throttle %d\n", urb->status);
1246 }
1247 netif_stop_queue (dev->net);
1248 break;
1249 default:
1250 netif_dbg(dev, tx_err, dev->net,
1251 "tx err %d\n", entry->urb->status);
1252 break;
1253 }
1254 }
1255
1256 usb_autopm_put_interface_async(dev->intf);
1257 (void) defer_bh(dev, skb, &dev->txq, tx_done);
1258 }tx throttle %d
tx err %dusbnet_bh
1476 // tasklet (work deferred from completions, in_irq) or timer
1477
1478 static void usbnet_bh (unsigned long param)
1479 {
1480 struct usbnet *dev = (struct usbnet *) param;
1481 struct sk_buff *skb;
1482 struct skb_data *entry;
1483
1484 while ((skb = skb_dequeue (&dev->done))) {
1485 entry = (struct skb_data *) skb->cb;
1486 switch (entry->state) {
1487 case rx_done:
1488 entry->state = rx_cleanup;
1489 rx_process (dev, skb);
1490 continue;
1491 case tx_done:
1492 kfree(entry->urb->sg);
1493 case rx_cleanup:
1494 usb_free_urb (entry->urb);
1495 dev_kfree_skb (skb);
1496 continue;
1497 default:
1498 netdev_dbg(dev->net, "bogus skb state %d\n", entry->state);
1499 }
1500 }
1501
1502 /* restart RX again after disabling due to high error rate */
1503 clear_bit(EVENT_RX_KILL, &dev->flags);
1504
1505 /* waiting for all pending urbs to complete?
1506 * only then can we forgo submitting anew
1507 */
1508 if (waitqueue_active(&dev->wait)) {
1509 if (dev->txq.qlen + dev->rxq.qlen + dev->done.qlen == 0)
1510 wake_up_all(&dev->wait);
1511
1512 // or are we maybe short a few urbs?
1513 } else if (netif_running (dev->net) &&
1514 netif_device_present (dev->net) &&
1515 netif_carrier_ok(dev->net) &&
1516 !timer_pending(&dev->delay) &&
1517 !test_bit(EVENT_RX_PAUSED, &dev->flags) &&
1518 !test_bit(EVENT_RX_HALT, &dev->flags)) {
1519 int temp = dev->rxq.qlen;
1520
1521 if (temp < RX_QLEN(dev)) {
1522 if (rx_alloc_submit(dev, GFP_ATOMIC) == -ENOLINK)
1523 return;
1524 if (temp != dev->rxq.qlen)
1525 netif_dbg(dev, link, dev->net,
1526 "rxqlen %d --> %d\n",
1527 temp, dev->rxq.qlen);
1528 if (dev->rxq.qlen < RX_QLEN(dev))
1529 tasklet_schedule (&dev->bh);
1530 }
1531 if (dev->txq.qlen < TX_QLEN (dev))
1532 netif_wake_queue (dev->net);
1533 }
1534 }