From: Marc Kleine-Budde <mkl@blackshift.org>
To: Jiaxun Yang <jiaxun.yang@flygoat.com>,
Du Huanpeng <u74147@gmail.com>,
linux-mips@vger.kernel.org
Cc: zhangj@wch.cn, linux@rempel-privat.de
Subject: Re: loongson ls2k1000: PCIe serial card WCH CH382L not working, maybe ioports problem
Date: Fri, 7 Aug 2020 10:35:40 +0200 [thread overview]
Message-ID: <ad026820-6b57-15a1-a31e-2d8c8829b7f4@blackshift.org> (raw)
In-Reply-To: <88921f60-1458-ab04-2ed9-bce57ce7101d@flygoat.com>
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On 8/7/20 10:01 AM, Jiaxun Yang wrote:
>> I'm testing a PCIe card to two uarts (WCH CH382L compatible,
>> https://item.jd.com/48547850173.html) on a loongson ls2k1000 board.
>>
>> With the card inserted the kernel detects the two new uarts:
>>
>> [ 2.060884] pci 0000:00:04.1: EHCI: unrecognized capability ff
>> [ 2.066721] pci 0000:00:04.1: EHCI: capability loop?
>> [ 2.066745] pci 0000:00:04.1: quirk_usb_early_handoff+0x0/0xa60 took 358764 usecs
>> [ 2.074542] pcieport 0000:00:09.0: PME: Signaling with IRQ 2
>> [ 2.080651] pcieport 0000:00:0a.0: PME: Signaling with IRQ 3
>> [ 2.086648] pcieport 0000:00:0b.0: PME: Signaling with IRQ 4
>> [ 2.092616] pcieport 0000:00:0c.0: PME: Signaling with IRQ 5
>> [ 2.098579] pcieport 0000:00:0d.0: PME: Signaling with IRQ 6
>> [ 2.104557] pcieport 0000:00:0e.0: PME: Signaling with IRQ 7
>> [ 2.113728] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
>> [ 2.120891] serial 0000:06:00.0: limiting MRRS to 256
>> [ 2.126314] 0000:06:00.0: ttyS0 at I/O 0xc0 (irq = 7, base_baud = 115200) is a XR16850
>> [ 2.134618] 0000:06:00.0: ttyS1 at I/O 0xc8 (irq = 7, base_baud = 115200) is a XR16850
>> [ 2.143130] 1fe00000.serial: ttyS2 at MMIO 0x1fe00000 (irq = 1, base_baud = 7812500) is a 16550A
>> [ 2.151946] printk: console [ttyS2] enabled
>> [ 2.160255] printk: bootconsole [early0] disabled
>> [ 2.170112] [drm] radeon kernel modesetting enabled.
>>
>> However a write to the serial fails:
>> / # echo "hello" >/dev/ttyS0
>> [ 9369.631915] serial 0000:06:00.0: LSR safety check engaged!
>> sh: write error: Input/output error
>
> I assume you're using my out-of-tree fork to support LS2K.
> I messed with Logic PIO in that fork.
> I'll fix it in mainline, sorry for the issue...
Do you have a tree that we can test?
Marc
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next prev parent reply other threads:[~2020-08-07 8:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-07 3:08 loongson ls2k1000: PCIe serial card WCH CH382L not working, maybe ioports problem Du Huanpeng
2020-08-07 8:01 ` Jiaxun Yang
2020-08-07 8:35 ` Marc Kleine-Budde [this message]
2020-08-07 9:39 ` Jiaxun Yang
2020-08-07 9:43 ` Marc Kleine-Budde
2020-08-12 6:34 ` Marc Kleine-Budde
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