On Sun, Dec 04, 2022 at 08:11:11PM +0200, Oleksii Hryhorovych wrote: > вс, 4 дек. 2022 г. в 18:53, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>: > > > > On Sun, Dec 04, 2022 at 06:42:19PM +0200, Oleksii Hryhorovych wrote: > > > Hi. I have a problem with linux "serial" driver. I`m using a MosChip > > > 9901 based ExpressCard 34 dual rs-232 controller. When I plugged this > > > card into my PC, the system detected it, but when I tried to send or > > > read something from one of the ports, there was silence. Loopback test > > > also fails. On windows this card works perfectly, so this is not a > > > hardware issue. My kernel version is "5.15.78-1-MANJARO". > > > > How exactly are you trying to send data through the port? What command > > did you use and what was the result? > > > I tried(each test 4 times, trying each device node for each port): > 1) Execute "cat /dev/ttyS6"(or ttyS7), connect rs-232 cable to port on > the card and to another PC, then send from another PC something to > port. > Result: nothing new appeared in console "cat" isn't the best test, minicom is good, as you tried: > 2) Connect rs232 cable to port on card and to another PC. Run terminal > on another PC, run minicom on this PC. Disable flow control. Send > something to terminal on both PCs. > Result: nothing appeared in terminals on both PCs. > 3) Connect pins number 2 and 3 on rs232 port (loopback test). Open > minicom, disable flow control and send something to the terminal. > Result: nothing new appeared in the terminal > 4) Connect pins number 2 and 3 on rs232 port (loopback test). Open > first console window, run "cat /dev/ttyS6"(or ttyS7). Open second > window, run "echo "test" > /dev/ttyS6"(or ttyS7). > Result: nothing new appeared in the first console I think the problem is that you do not have a driver attached to your serial ports, because: > > > "dmesg" output about this card: > > > > > > [64329.311478] pcieport 0000:00:1c.1: pciehp: Slot(1): Card present > > > [64329.311485] pcieport 0000:00:1c.1: pciehp: Slot(1): Link Up > > > [64329.442833] pci 0000:02:00.0: [9710:9901] type 00 class 0x070002 > > > [64329.442867] pci 0000:02:00.0: reg 0x10: [io 0x0000-0x0007] > > > [64329.442883] pci 0000:02:00.0: reg 0x14: [mem 0x00000000-0x00000fff] > > > [64329.442922] pci 0000:02:00.0: reg 0x20: [mem 0x00000000-0x00000fff] > > > [64329.443096] pci 0000:02:00.0: supports D1 D2 > > > [64329.443099] pci 0000:02:00.0: PME# supported from D0 D1 D2 D3hot D3cold > > > [64329.443402] pci 0000:02:00.1: [9710:9901] type 00 class 0x070002 > > > [64329.443434] pci 0000:02:00.1: reg 0x10: [io 0x0000-0x0007] > > > [64329.443451] pci 0000:02:00.1: reg 0x14: [mem 0x00000000-0x00000fff] > > > [64329.443495] pci 0000:02:00.1: reg 0x20: [mem 0x00000000-0x00000fff] > > > [64329.443679] pci 0000:02:00.1: supports D1 D2 > > > [64329.443683] pci 0000:02:00.1: PME# supported from D0 D1 D2 D3hot D3cold > > > [64329.443948] pci 0000:02:00.0: BAR 1: assigned [mem 0xd0000000-0xd0000fff] > > > [64329.443960] pci 0000:02:00.0: BAR 4: assigned [mem 0xd0001000-0xd0001fff] > > > [64329.443969] pci 0000:02:00.1: BAR 1: assigned [mem 0xd0002000-0xd0002fff] > > > [64329.443979] pci 0000:02:00.1: BAR 4: assigned [mem 0xd0003000-0xd0003fff] > > > [64329.443987] pci 0000:02:00.0: BAR 0: assigned [io 0x2000-0x2007] > > > [64329.443995] pci 0000:02:00.1: BAR 0: assigned [io 0x2008-0x200f] > > > [64329.444006] pcieport 0000:00:1c.1: PCI bridge to [bus 02-22] > > > [64329.444012] pcieport 0000:00:1c.1: bridge window [io 0x2000-0x3fff] > > > [64329.444017] pcieport 0000:00:1c.1: bridge window [mem > > > 0xd0000000-0xd3ffffff] > > > [64329.444023] pcieport 0000:00:1c.1: bridge window [mem > > > 0xbfb00000-0xbfcfffff 64bit pref] > > > [64329.444110] serial 0000:02:00.0: enabling device (0000 -> 0003) > > > [64329.444690] 0000:02:00.0: ttyS6 at I/O 0x2000 (irq = 17, base_baud > > > = 115200) is a 16550A > > > [64329.448040] serial 0000:02:00.1: enabling device (0000 -> 0003) > > > [64329.452843] 0000:02:00.1: ttyS7 at I/O 0x2008 (irq = 18, base_baud > > > = 115200) is a 16550A ttyS6 and ttyS7 seem to be the correct devices, but: > > Which tty device node are you using here? > > > I tried using both nodes, /dev/ttyS6 and /dev/ttyS7, and the result > was the same. > > What does the output of `find /dev/serial/` show? > > > /dev/serial/ > /dev/serial/by-id > /dev/serial/by-id/usb-HP_HP_hs2340_HSPA+_MobileBroadband_C69366190FA2EB60-if01 > /dev/serial/by-id/usb-HP_HP_hs2340_HSPA+_MobileBroadband_C69366190FA2EB60-if03 > /dev/serial/by-id/usb-HP_HP_hs2340_HSPA+_MobileBroadband_C69366190FA2EB60-if09 > /dev/serial/by-path > /dev/serial/by-path/pci-0000:00:1a.0-usb-0:1.2:1.9 > /dev/serial/by-path/pci-0000:00:1a.0-usb-0:1.2:1.1 > /dev/serial/by-path/pci-0000:00:1a.0-usb-0:1.2:1.3 You only have usb-serial devices seen in the system. Are you sure the PCI card is being controlled properly? No other kernel log messages? Is /dev/ttyS6 and ttyS7 present in /dev? What does 'ls -l /sys/class/tty/' show? thanks, greg k-h
