Hello Chen, I see. Also learning, reading and trying to get to the root of the problem.
> [ 1.637664] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A > [ 1.658835] serial8250: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A Please, try to experiment with ttyS1. But I guess, you already know what I just wrote. Maybe this also can help: http://forums.debian.net/viewtopic.php?f=7&t=111355 Zoran On Mon, Jul 25, 2016 at 7:08 AM, cheng yichen <[email protected]> wrote: > Hi Zoran > > The ttyS0 is superIo uart. Because I add uart asl code in coreboot system > will show "00:05: ttyS0" > If I remove asl code system will show "serial8250:ttty" Thank you > > 2016-07-25 12:10 GMT+08:00 Zoran Stojsavljevic < > [email protected]>: > >> > home# dmesg | grep -i tty >> > [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic >> root=UUID=b2b7f7fa-b1db-4e97- >> > 941f-8aaee291f3dc ro console=tty1 console=ttyS0,115200n8 quiet splash >> vt.handoff=7 >> > [ 0.000000] Kernel command line: >> > BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic >> root=UUID=b2b7f7fa-b1db- >> > 4e97-941f-8aaee291f3dc ro console=tty1 console=ttyS0,115200n8 quiet >> splash vt.handoff=7 >> > [ 0.000000] console [tty1] enabled >> > [ 0.000000] console [ttyS0] enabled >> > [ 1.637664] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) >> is a 16550A >> > [ 1.658835] serial8250: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = >> 115200) is a 16550A >> > [ 3.412478] fbcon: Remapping primary device, fb1, to tty 1-63 >> > [ 44.378835] systemd[1]: Created slice system-serial\x2dgetty.slice. >> > [ 44.380198] systemd[1]: Created slice system-getty.slice. >> _______ >> >> Hello Cheng, >> >> Please, try to do the following: lspci -vv (to find your serial on PCIe), >> then try to remap your IRQs, to see if this will somehow work. >> >> Example: >> setserial /dev/ttyS0 port 0xd800 UART 16550A irq 5 >> setserial /dev/ttyS0 -av >> /dev/ttyS0, Line 0, UART: 16550A, Port: 0xd800, IRQ: 5 >> Baud_base: 115200, close_delay: 5000, divisor: 0 >> closing_wait: 37856 >> Flags: spd_normal skip_test >> >> Something like described on this web pointer: >> https://forums.gentoo.org/viewtopic-t-249041-start-0.html >> >> Please, report your attempts/results here. >> >> Thank you, >> Zoran >> >> On Mon, Jul 25, 2016 at 4:33 AM, cheng yichen <[email protected]> >> wrote: >> >>> Hi all >>> >>> After i follow kontron/ktqm77 setting. I can't solve the issue. >>> I try to change iqr(for com1) to 5 or 6. but system can't print linux >>> message and minicom is not workable. >>> >>> >>> >>> dump from superiotool >>> Found Winbond W83627DHG-P/-PT (id=0xb0, rev=0x73) at 0x2e >>> Register dump: >>> idx 02 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f >>> val ff b0 73 ff 00 42 00 00 ff 50 80 00 00 eb 21 00 ff >>> def 00 b0 NA ff 00 MM 00 MM RR 50 00 00 RR e2 21 00 00 >>> LDN 0x00 (Floppy) >>> idx 30 60 61 70 74 f0 f1 f2 f4 f5 >>> val 01 03 f0 06 02 8e 00 ff 00 00 >>> def 01 03 f0 06 02 8e 00 ff 00 00 >>> LDN 0x01 (Parallel port) >>> idx 30 60 61 70 74 f0 >>> val 01 03 78 07 04 3f >>> def 01 03 78 07 04 3f >>> LDN 0x02 (COM1) >>> idx 30 60 61 70 f0 >>> val 01 03 f8 04 40 >>> def 01 03 f8 04 00 >>> LDN 0x03 (COM2) >>> idx 30 60 61 70 f0 f1 >>> val 01 02 f8 03 40 00 >>> def 01 02 f8 03 00 00 >>> LDN 0x05 (Keyboard) >>> >>> >>> dump from dmesg >>> >>> home# dmesg | grep -i tty >>> [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic >>> root=UUID=b2b7f7fa-b1db-4e97-941f-8aaee291f3dc ro console=tty1 >>> console=ttyS0,115200n8 quiet splash vt.handoff=7 >>> [ 0.000000] Kernel command line: >>> BOOT_IMAGE=/boot/vmlinuz-4.2.0-16-generic >>> root=UUID=b2b7f7fa-b1db-4e97-941f-8aaee291f3dc ro console=tty1 >>> console=ttyS0,115200n8 quiet splash vt.handoff=7 >>> [ 0.000000] console [tty1] enabled >>> [ 0.000000] console [ttyS0] enabled >>> [ 1.637664] 00:05: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) >>> is a 16550A >>> [ 1.658835] serial8250: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = >>> 115200) is a 16550A >>> [ 3.412478] fbcon: Remapping primary device, fb1, to tty 1-63 >>> [ 44.378835] systemd[1]: Created slice system-serial\x2dgetty.slice. >>> [ 44.380198] systemd[1]: Created slice system-getty.slice. >>> >>> >>> >>> >>> >>> 2016-07-22 20:24 GMT+08:00 Kyösti Mälkki <[email protected]>: >>> >>>> On Fri, Jul 22, 2016 at 1:14 PM, cheng yichen <[email protected]> >>>> wrote: >>>> > Hi all >>>> > >>>> > My platform is braswell SOC with W83627dhg superIO. In post stage I >>>> can get >>>> > debug message over w83627 uart1(3f8/irq4). but after boot to linux, >>>> uart >>>> > port is not woarkable. I test the function by minicom but I can't >>>> receive >>>> > and send data. I can get uart information by dmesg command. >>>> > How to initial it in corebooot? >>>> >>>> Does not sound like a coreboot issue to me. >>>> >>>> Do you have CTS/RTS hardware handshake disabled in minicom >>>> configuration? If you directed kernel console to serial port, you >>>> should not (cannot) use the port for user apps. >>>> >>>> HTH, >>>> Kyösti >>>> >>> >>> >>> -- >>> coreboot mailing list: [email protected] >>> https://www.coreboot.org/mailman/listinfo/coreboot >>> >> >> >
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