8148EVM开发板识别不到pcie设备

我们在使用一款TMDXEVM8148开发板，处理器型号x8148x3874….软件linux内核版本 2.6.37

问题：

最近我们在移植一个pcie接口的wifi模块，发现系统在/sys/bus/pci/下面 随机出现00:00  00:01这两个设备，似乎扫描不到wifi厂商的设备

源码使用的是dvr_rdk的默认配置，RC模式，是源码哪里配置有问题吗？

JianLei Yan：

menuconfig 中相关pcie debug配置，输出no_link,信息。可是有的时候系统是能检测到RC bridge的，有的时候自己的brige也检测不到，

不明白这里有什么问题？

时钟也测试了，RC和EP参考时钟均是100MHZ。

我们使用的8148发布版本是 DVRRDK_04.01.00.02.tar.lzma，Userguide说：

Support for TI814X Root Complex is added from 04.01.00.06 release, hence this document is notapplicable for prior TI814X releases

那么这个版本支持pcie RC模式吗？

Chris Meng：

回复 JianLei Yan:

JianLei Yan时钟也测试了，RC和EP参考时钟均是100MHZ。

请问是同源的么？

JianLei Yan：

回复 Chris Meng:

是的，我测试的是CDCM61002RHBR芯片，引出PCI_CONN_REFP，PCI_CONN_REFN送到ep，SERDES_IN_REFP，SERDES_IN_REFN送到处理器

管脚输出100MHZ的

JianLei Yan：

回复 JianLei Yan:

现在有几个现象

1、启动后大多数时候/sys/bus/pci这个目录是空的，有时候会有两个子目录

2、系统启动有时候会因为pcie启动失败，打印

ti81xx_pcie: Invoking PCI BIOS...
ti81xx_pcie: Setting up Host Controller...
ti81xx_pcie: Register base mapped @0xc8830000
ti81xx_pcie: forcing link width - x1
Unhandled fault: external abort on non-linefetch (0x1008) at 0xc8830004
Internal error: : 1008 [#1]
last sysfs file:Modules linked in:
CPU: 0Not tainted(2.6.37 #14)
PC is at ti81xx_pcie_setup+0x324/0x5c4
LR is at schedule_timeout+0x148/0x174
pc : [<c0064110>]lr : [<c040250c>]psr: 60000013
sp : c4825e38ip : c4825dd8fp : c4825e64
r10: c05e9110r9 : 00000000r8 : c4893000
r7 : c057b180r6 : c489305cr5 : c4893040r4 : c05c1a18
r3 : c8830000r2 : 00000604r1 : 00000000r0 : 00000000
Flags: nZCvIRQs onFIQs onMode SVC_32ISA ARMSegment kernel
Control: 10c5387fTable: 80004019DAC: 00000017
Process swapper (pid: 1, stack limit = 0xc48242e8)
Stack: (0xc4825e38 to 0xc4826000)
5e20:c4825e64 c4825e48
5e40: c00cbd04 c0584a00 c4893000 00000000 00000000 c0587500 c4825e94 c4825e68
5e60: c000c2e4 c0063df8 60000013 c056ff18 c056ff4c c05849c8 c05849c8 00000000
5e80: 00000000 00000000 c4825ea4 c4825e98 c0063bcc c000c250 c4825eb4 c4825ea8
5ea0: c023333c c0063b50 c4825ed4 c4825eb8 c02323ac c023332c c056ff18 c056ff4c
5ec0: c05849c8 00000000 c4825ef4 c4825ed8 c02324d0 c02322e8 c481ee34 c05849c8
5ee0: c4825ef8 c0232468 c4825f1c c4825ef8 c0231544 c0232474 c481ee38 c4888930
5f00: c05849c8 c4892180 c05a51f0 00000000 c4825f2c c4825f20 c0232044 c02314f8
5f20: c4825f5c c4825f30 c0231c48 c0232030 c04dda2e c4825f40 c05849c8 c002fb14
5f40: c0078e88 c0013430 00000000 00000000 c4825f84 c4825f60 c023272c c0231ba0
5f60: c002f6c8 c002fb14 c0078e88 c0013430 00000000 00000000 c4825f94 c4825f88
5f80: c02337f8 c0232688 c4825fa4 c4825f98 c0013444 c02337b8 c4825fdc c4825fa8
5fa0: c00424f8 c001343c c4825fc4 00000196 c05918dc c0078e88 c4825fdc c002f6c8
5fc0: c002fb14 c0078e88 00000013 00000000 c4825ff4 c4825fe0 c0008cfc c0042448
5fe0: 00000000 c0008c5c 00000000 c4825ff8 c0078e88 c0008c68 16969696 149e9694
Backtrace:[<c0063dec>] (ti81xx_pcie_setup+0x0/0x5c4) from [<c000c2e4>] (pci_common_init+0xa0/0x190)r8:c0587500 r7:00000000 r6:00000000 r5:c4893000 r4:c0584a00
[<c000c244>] (pci_common_init+0x0/0x190) from [<c0063bcc>] (ti81xx_pcie_probe+0x88/0xa0)
[<c0063b44>] (ti81xx_pcie_probe+0x0/0xa0) from [<c023333c>] (platform_drv_probe+0x1c/0x20)
[<c0233320>] (platform_drv_probe+0x0/0x20) from [<c02323ac>] (driver_probe_device+0xd0/0x18c)
[<c02322dc>] (driver_probe_device+0x0/0x18c) from [<c02324d0>] (__driver_attach+0x68/0x8c)r7:00000000 r6:c05849c8 r5:c056ff4c r4:c056ff18
[<c0232468>] (__driver_attach+0x0/0x8c) from [<c0231544>] (bus_for_each_dev+0x58/0x88)r6:c0232468 r5:c4825ef8 r4:c05849c8 r3:c481ee34
[<c02314ec>] (bus_for_each_dev+0x0/0x88) from [<c0232044>] (driver_attach+0x20/0x28)r7:00000000 r6:c05a51f0 r5:c4892180 r4:c05849c8
[<c0232024>] (driver_attach+0x0/0x28) from [<c0231c48>] (bus_add_driver+0xb4/0x230)
[<c0231b94>] (bus_add_driver+0x0/0x230) from [<c023272c>] (driver_register+0xb0/0x134)
[<c023267c>] (driver_register+0x0/0x134) from [<c02337f8>] (platform_driver_register+0x4c/0x60)
[<c02337ac>] (platform_driver_register+0x0/0x60) from [<c0013444>] (ti81xx_pcie_rc_init+0x14/0x20)
[<c0013430>] (ti81xx_pcie_rc_init+0x0/0x20) from [<c00424f8>] (do_one_initcall+0xbc/0x190)
[<c004243c>] (do_one_initcall+0x0/0x190) from [<c0008cfc>] (kernel_init+0xa0/0x154)r8:00000000 r7:00000013 r6:c0078e88 r5:c002fb14 r4:c002f6c8
[<c0008c5c>] (kernel_init+0x0/0x154) from [<c0078e88>] (do_exit+0x0/0x5d0)r5:c0008c5c r4:00000000
Code: e2833a01 e1c320ba f57ff04f e5943000 (e5932004)---[ end trace 1b75b31a2719ed1c ]---
Kernel panic - not syncing: Attempted to kill init!
Backtrace:[<c004ffc4>] (dump_backtrace+0x0/0x110) from [<c040197c>] (dump_stack+0x18/0x1c)r6:c4822000 r5:0000000b r4:c05c1f98 r3:60000113
[<c0401964>] (dump_stack+0x0/0x1c) from [<c04019dc>] (panic+0x5c/0x178)
[<c0401980>] (panic+0x0/0x178) from [<c0078ef0>] (do_exit+0x68/0x5d0)r3:c0588a4c r2:c4825c68 r1:00000001 r0:c04e8c01r7:00000000
[<c0078e88>] (do_exit+0x0/0x5d0) from [<c0050438>] (die+0x2b0/0x2ec)r7:00000000
[<c0050188>] (die+0x0/0x2ec) from [<c00504c8>] (arm_notify_die+0x54/0x58)
[<c0050474>] (arm_notify_die+0x0/0x58) from [<c0042248>] (do_DataAbort+0x8c/0xa0)
[<c00421bc>] (do_DataAbort+0x0/0xa0) from [<c04038ec>] (__dabt_svc+0x4c/0x60)
Exception stack(0xc4825df0 to 0xc4825e38)
5de0:00000000 00000000 00000604 c8830000
5e00: c05c1a18 c4893040 c489305c c057b180 c4893000 00000000 c05e9110 c4825e64
5e20: c4825dd8 c4825e38 c040250c c0064110 60000013 ffffffffr8:c4893000 r7:c057b180 r6:c489305c r5:c4825e24 r4:ffffffff
[<c0063dec>] (ti81xx_pcie_setup+0x0/0x5c4) from [<c000c2e4>] (pci_common_init+0xa0/0x190)r8:c0587500 r7:00000000 r6:00000000 r5:c4893000 r4:c0584a00
[<c000c244>] (pci_common_init+0x0/0x190) from [<c0063bcc>] (ti81xx_pcie_probe+0x88/0xa0)
[<c0063b44>] (ti81xx_pcie_probe+0x0/0xa0) from [<c023333c>] (platform_drv_probe+0x1c/0x20)
[<c0233320>] (platform_drv_probe+0x0/0x20) from [<c02323ac>] (driver_probe_device+0xd0/0x18c)
[<c02322dc>] (driver_probe_device+0x0/0x18c) from [<c02324d0>] (__driver_attach+0x68/0x8c)r7:00000000 r6:c05849c8 r5:c056ff4c r4:c056ff18
[<c0232468>] (__driver_attach+0x0/0x8c) from [<c0231544>] (bus_for_each_dev+0x58/0x88)r6:c0232468 r5:c4825ef8 r4:c05849c8 r3:c481ee34
[<c02314ec>] (bus_for_each_dev+0x0/0x88) from [<c0232044>] (driver_attach+0x20/0x28)r7:00000000 r6:c05a51f0 r5:c4892180 r4:c05849c8
[<c0232024>] (driver_attach+0x0/0x28) from [<c0231c48>] (bus_add_driver+0xb4/0x230)
[<c0231b94>] (bus_add_driver+0x0/0x230) from [<c023272c>] (driver_register+0xb0/0x134)
[<c023267c>] (driver_register+0x0/0x134) from [<c02337f8>] (platform_driver_register+0x4c/0x60)
[<c02337ac>] (platform_driver_register+0x0/0x60) from [<c0013444>] (ti81xx_pcie_rc_init+0x14/0x20)
[<c0013430>] (ti81xx_pcie_rc_init+0x0/0x20) from [<c00424f8>] (do_one_initcall+0xbc/0x190)
[<c004243c>] (do_one_initcall+0x0/0x190) from [<c0008cfc>] (kernel_init+0xa0/0x154)r8:00000000 r7:00000013 r6:c0078e88 r5:c002fb14 r4:c002f6c8
[<c0008c5c>] (kernel_init+0x0/0x154) from [<c0078e88>] (do_exit+0x0/0x5d0)r5:c0008c5c r4:00000000这些现象说明什么呢？

Chris Meng：

回复 JianLei Yan:

JianLei Yan

是的，我测试的是CDCM61002RHBR芯片，引出PCI_CONN_REFP，PCI_CONN_REFN送到ep，SERDES_IN_REFP，SERDES_IN_REFN送到处理器

管脚输出100MHZ的

JianLei Yan：

回复 Chris Meng:

插槽上REFCLK+ 和REFCLK-这两根信号线吗？他们都是从CDCM61002RHBR芯片输出的，算是同源吗？

JianLei Yan：

回复 JianLei Yan:

这个时钟不是从处理器引出的，应该是独立的时钟源

Chris Meng：

回复 JianLei Yan:

你好，

你看看下面链接的信息：

http://processors.wiki.ti.com/index.php/TI81XX_PCIe_FAQs

http://processors.wiki.ti.com/index.php/DM816x_AM389x_PCIe_Clocking_Schemes

JianLei Yan：

回复 Chris Meng:

Chris Meng

你好，

你看看下面链接的信息：

http://processors.wiki.ti.com/index.php/TI81XX_PCIe_FAQs

http://processors.wiki.ti.com/index.php/DM816x_AM389x_PCIe_Clocking_Schemes

Chris Meng：

回复 JianLei Yan:

JianLei Yan

我们在使用的是ti做的公板，TI81XX_PSP_PCI_Express_Root_Complex_Driver_User_Guide对814X说，RC模式是在

SDK 04.01.00.06之后的版本添加的，我们用的是 DVRRDK_04.01.00.02.tar.lzma，能不能说明是这个问题造成的呢？

原文是：

NOTE1: Support for TI814X Root Complex is added from 04.01.00.06 release, hence this document is not applicable for prior TI814X releases.

这里的软件版本是psp，也就是linux驱动的版本，不是dvr rdk的版本。

最新的驱动你可以在git上下载：

http://arago-project.org/git/projects/?p=linux-omap3.git;a=summary