Smart210 USB ROOT HUB自動(dòng)復(fù)位

ID:85681 · 發(fā)表于 2015-7-15 01:39

現(xiàn)象：

使用usb camera 在lcd上顯示圖像時(shí)，偶爾發(fā)生USB ROOT HUB reset，導(dǎo)致camera停止工作，

然后發(fā)生usb camera自動(dòng)斷開(kāi)，然后又重新識(shí)別，斷開(kāi)又識(shí)別。

如果不使用usb camera，就不會(huì)發(fā)生 usb reset。

分析：

1、懷疑USB供電問(wèn)題，導(dǎo)致usb不穩(wěn)定，但是，使用帶外接電源的usb，沒(méi)有任何改善；

2、分析log，是usb異常中斷導(dǎo)致，但是仍然無(wú)法判斷異常的來(lái)源；

3、懷疑是驅(qū)動(dòng)問(wèn)題，更換linux 內(nèi)核版本，3.4.2、3.7、3.9.7、3.10、3.13幾個(gè)版本都有同樣問(wèn)題；

4、使用官方kernel 3.0.8就沒(méi)有問(wèn)題，確認(rèn)還是驅(qū)動(dòng)配置問(wèn)題。但是仍然找不到原因。

使用排除法，移植3.0.8內(nèi)核，一步一步添加官方驅(qū)動(dòng)，無(wú)論與camera usb相關(guān)不相關(guān)，都要測(cè)試。

最終發(fā)現(xiàn)問(wèn)題在LCD的GPIO配置上。

結(jié)果：

從Linux主線下載的新版本的kernel后，配置好LCD的時(shí)序，發(fā)現(xiàn)lcd能夠正常工作，所以就沒(méi)有繼續(xù)關(guān)心LCD的配置，

尤其是 RGB的GPIO配置，甚至都沒(méi)有把LCD的GPIO配置成功能引腳，但恰巧是這方面的問(wèn)題。

最終重新配置LCD的gpio 為功能，并設(shè)置驅(qū)動(dòng)能力，經(jīng)過(guò)很長(zhǎng)時(shí)間的測(cè)試USB沒(méi)有發(fā)生reset。

問(wèn)題log：

[cpp] view plaincopy

[liujia@210]#[ 171.257109] lj:port 1, status 0100, change 0001, 12 Mb/s
[ 171.257174] usb 1-1: USB disconnect, device number 23
[ 171.257219] usb 1-1.2: USB disconnect, device number 24
[ 171.522012] usb 1-1: new high-speed USB device number 25 using s5p-ehci
[ 171.652422] usb 1-1: New USB device found, idVendor=0424, idProduct=2514
[ 171.652480] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 171.657089] hub 1-1:1.0: USB hub found
[ 171.657294] hub 1-1:1.0: 4 ports detected
[ 171.857405] lj:port 2, status 0101, change 0000, 12 Mb/s
[ 171.942257] usb 1-1.2: new high-speed USB device number 26 using s5p-ehci
[ 172.265034] usb 1-1.2: New USB device found, idVendor=046d, idProduct=0825
[ 172.265093] usb 1-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ 172.265154] usb 1-1.2: SerialNumber: F46BE640
[ 172.269636] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)
[ 172.291195] input: UVC Camera (046d:0825) as /devices/platform/s5p-ehci/usb1/1-1/1-1.2/1-1.2:1.0/input/input10
[ 174.309219] lj:port 1, status 0100, change 0001, 12 Mb/s
[ 174.309283] usb 1-1: USB disconnect, device number 25
[ 174.309328] usb 1-1.2: USB disconnect, device number 26
[ 174.572011] usb 1-1: new high-speed USB device number 27 using s5p-ehci
[ 174.702413] usb 1-1: New USB device found, idVendor=0424, idProduct=2514
[ 174.702471] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 174.706912] hub 1-1:1.0: USB hub found
[ 174.707163] hub 1-1:1.0: 4 ports detected
[ 174.907402] lj:port 2, status 0101, change 0000, 12 Mb/s
[ 174.992252] usb 1-1.2: new high-speed USB device number 28 using s5p-ehci
[ 175.315403] usb 1-1.2: New USB device found, idVendor=046d, idProduct=0825
[ 175.315462] usb 1-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=2
[ 175.315524] usb 1-1.2: SerialNumber: F46BE640
[ 175.320003] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)
[ 175.341248] input: UVC Camera (046d:0825) as /devices/platform/s5p-ehci/usb1/1-1/1-1.2/1-1.2:1.0/input/input11

解決辦法：
1、 arch/arm/mach-s5pv210/setup-fb-24bpp.c
[cpp] view plaincopy

static void s5pv210_fb_cfg_gpios(unsigned int base, unsigned int nr)
{
s3c_gpio_cfgrange_nopull(base, nr, S3C_GPIO_SFN(2));
for (; nr > 0; nr--, base++)
s5p_gpio_set_drvstr(base, S5P_GPIO_DRVSTR_LV4);
}
void s5pv210_fb_gpio_setup_24bpp(void)
{
#if 0
s5pv210_fb_cfg_gpios(S5PV210_GPF0(0), 8);
s5pv210_fb_cfg_gpios(S5PV210_GPF1(0), 8);
s5pv210_fb_cfg_gpios(S5PV210_GPF2(0), 8);
s5pv210_fb_cfg_gpios(S5PV210_GPF3(0), 4);
/* Set DISPLAY_CONTROL register for Display path selection.
*
* ouput | RGB | I80 | ITU
* -----------------------------------
* 00 | MIE | FIMD | FIMD
* 01 | MDNIE | MDNIE | FIMD
* 10 | FIMD | FIMD | FIMD
* 11 | FIMD | FIMD | FIMD
*/
writel(0x2, S5P_MDNIE_SEL);
#endif
int i;
for (i = 0; i < 8; i++) {
s3c_gpio_cfgpin(S5PV210_GPF0(i), S3C_GPIO_SFN(2));
s3c_gpio_setpull(S5PV210_GPF0(i), S3C_GPIO_PULL_NONE);
}
for (i = 0; i < 8; i++) {
s3c_gpio_cfgpin(S5PV210_GPF1(i), S3C_GPIO_SFN(2));
s3c_gpio_setpull(S5PV210_GPF1(i), S3C_GPIO_PULL_NONE);
}
for (i = 0; i < 8; i++) {
s3c_gpio_cfgpin(S5PV210_GPF2(i), S3C_GPIO_SFN(2));
s3c_gpio_setpull(S5PV210_GPF2(i), S3C_GPIO_PULL_NONE);
}
for (i = 0; i < 4; i++) {
s3c_gpio_cfgpin(S5PV210_GPF3(i), S3C_GPIO_SFN(2));
s3c_gpio_setpull(S5PV210_GPF3(i), S3C_GPIO_PULL_NONE);
}
/* mDNIe SEL: why we shall write 0x2 ? */
writel(0x2, S5P_MDNIE_SEL);
/* drive strength to 2x ....(max for smdkv210) */
writel(0xaaaaaaaa, S5PV210_GPF0_BASE + 0xc);
writel(0xaaaaaaaa, S5PV210_GPF1_BASE + 0xc);
writel(0xaaaaaaaa, S5PV210_GPF2_BASE + 0xc);
writel(0x000000aa, S5PV210_GPF3_BASE + 0xc);
}

2、arch/arm/mach-s5pv210/include/mach/regs-gpio.h

[cpp] view plaincopy

/* 添加代碼*/
#define S5PV210_GPF0_BASE(S5P_VA_GPIO + 0x120)
#define S5PV210_GPF1_BASE(S5P_VA_GPIO + 0x140)
#define S5PV210_GPF2_BASE(S5P_VA_GPIO + 0x160)
#define S5PV210_GPF3_BASE(S5P_VA_GPIO + 0x180)

ID:351949 · 發(fā)表于 2018-6-14 16:13

你好我也遇到了類似的問(wèn)題，按照您的思路去修改，效果有所改善，但是，剛開(kāi)機(jī)還是存在復(fù)位重啟的現(xiàn)象

ID:358857 · 發(fā)表于 2018-6-25 21:56

學(xué)習(xí)了，謝謝樓主

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Smart210 USB ROOT HUB自動(dòng)復(fù)位