No ttysWK device files

EugenyB1

Edit:

So we have two problems:
(1) my local bench assembles update.img without support of these sWK files - why? What should I do?
(2) I see nothing in the scope output when writing to any of these files with standard buildroot image running. Is device faulty?


More info:

I compiled this T-Firefly / rk3308-linux · GitLab (howver the source code was downloaded approximately a year ago) and I do not see RS485 device files in the list.

1. RS485_1: /dev/ttysWK0
   
2. RS485_2: /dev/ttysWK1
   
3. RS485_3: /dev/ttysWK2
   
4. RS232  : /dev/ttysWK3

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How to identify which device file corresponds to each RS485 serial port?

1. / # cat /proc/tty/driver/serial
   
2. serinfo:1.0 driver revision:
   
3. 0: uart:unknown port:00000000 irq:0
   
4. 1: uart:unknown port:00000000 irq:0
   
5. 2: uart:unknown port:00000000 irq:0
   
6. 3: uart:unknown port:00000000 irq:0
   
7. 4: uart:unknown port:00000000 irq:0

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1. / # echo "aaa" > /dev/ttyS0
   
2. sh: write error: Input/output error
   
3. / # echo "aaa" > /dev/ttyS1
   
4. sh: write error: Input/output error
   
5. / # echo "aaa" > /dev/ttyS2
   
6. sh: write error: Input/output error
   
7. / # echo "aaa" > /dev/ttyS3
   
8. sh: write error: Input/output error
   
9. / # echo "aaa" > /dev/ttyS4
   
10. sh: write error: Input/output error

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Executable file spi-wk2xxx has the following

1. :con_wk2xxx_subport bad iobase %d
   
2. 
   1: bad iobase %d
   
3. wk2xxx-%d %s cannot create workqueue
   
4. wk2xxxspi cannot allocate irq %d
   
5. ttySWK ttysWK

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but I do not see source for it.

1. /proc/tty # cat drivers
   
2. /dev/tty             /dev/tty        5       0 system:/dev/tty
   
3. /dev/console         /dev/console    5       1 system:console
   
4. /dev/ptmx            /dev/ptmx       5       2 system
   
5. /dev/vc/0            /dev/vc/0       4       0 system:vtmaster
   
6. rfcomm               /dev/rfcomm   216 0-255 serial
   
7. usbserial            /dev/ttyUSB   188 0-511 serial
   
8. serial               /dev/ttyS       4 64-68 serial
   
9. pty_slave            /dev/pts      136 0-1048575 pty:slave
   
10. pty_master           /dev/ptm      128 0-1048575 pty:master
    
11. unknown              /dev/tty        4 1-63 console
    
12. fiq-debugger         /dev/ttyFIQ   254       0 serial

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Now I am comparing behavior of IHC3308GW-Buildroot-20211221.img (original) with mehavior of my compiled image:
original

1. [    1.120580] pwm-regulator vdd-core: lookup for GPIO enable failed
   
2. [    1.121418] Serial: 8250/16550 driver, 5 ports, IRQ sharing disabled
   
3. [    1.124688] [drm] Initialized drm 1.1.0 20060810
   
4. [    1.124846] random: nonblocking pool is initialized
   
5. [    1.127942] Unable to detect cache hierarchy for CPU 0
   
6. [    1.135358] loop: module loaded
   
7. [    1.135600] SCSI Media Changer driver v0.25
   
8. *******************************************
   
9. [    1.136809] rockchip-spi ff120000.spi: Failed to request TX DMA channel
   
10. [    1.136851] rockchip-spi ff120000.spi: Failed to request RX DMA channel
    
11. [    1.139473] 11wk2xxx_probe: setup mode 0, 8 bits/w, 10000000 Hz max
    
12. [    1.139557] of_get_named_gpiod_flags: parsed 'power-gpio' property of node '/spi@ff120000/spi_wk2xxx@00[0]' - status (0)
    
13. [    1.139629] of_get_named_gpiod_flags: parsed 'reset-gpio' property of node '/spi@ff120000/spi_wk2xxx@00[0]' - status (0)
    
14. [    1.309710] of_get_named_gpiod_flags: parsed 'irq-gpio' property of node '/spi@ff120000/spi_wk2xxx@00[0]' - status (0)
    
15. [    1.309760] of_get_named_gpiod_flags: parsed 'cs-gpio' property of node '/spi@ff120000/spi_wk2xxx@00[0]' - status (0)
    
16. [    1.309957] wk2xxx_serial_init()
    
17. [    1.309981] wk2xxx_request_port
    
18. [    1.310001] ttysWK0 at I/O 0x1 (irq = 87, base_baud = 460800) is a wk2xxx
    
19. [    1.310404] uart_add_one_port success for line i:= 0 with right 0
    
20. [    1.310429] wk2xxx_request_port
    
21. [    1.310445] ttysWK1 at I/O 0x2 (irq = 87, base_baud = 460800) is a wk2xxx
    
22. [    1.310733] uart_add_one_port success for line i:= 1 with right 0
    
23. [    1.310754] wk2xxx_request_port
    
24. [    1.310770] ttysWK2 at I/O 0x3 (irq = 87, base_baud = 460800) is a wk2xxx
    
25. [    1.311037] uart_add_one_port success for line i:= 2 with right 0
    
26. [    1.311060] wk2xxx_request_port
    
27. [    1.311076] ttysWK3 at I/O 0x4 (irq = 87, base_baud = 460800) is a wk2xxx
    
28. [    1.311392] uart_add_one_port success for line i:= 3 with right 0
    
29. [    1.311412] uart_add_one_port = 0x0
    
30. *******************************************
    
31. [    1.311468] register spi return v = :0
    
32. [    1.311538] lora1276 register spi return v = :0
    
33. [    1.311585] CAN device driver interface
    
34. [    1.324486] rk_gmac-dwmac ff4e0000.ethernet: clock input or output? (input).
    
35. [    1.324542] rk_gmac-dwmac ff4e0000.ethernet: Can not read property: tx_delay.
    
36. [    1.324561] rk_gmac-dwmac ff4e0000.ethernet: set tx_delay to 0x30
    
37. [    1.324577] rk_gmac-dwmac ff4e0000.ethernet: Can not read property: rx_delay.
    
38. [    1.324594] rk_gmac-dwmac ff4e0000.ethernet: set rx_delay to 0x10
    
39. [    1.324619] rk_gmac-dwmac ff4e0000.ethernet: integrated PHY? (no).
    
40. [    1.324896] rk_gmac-dwmac ff4e0000.ethernet: clock input from PHY
    
41. [    1.329934] rk_gmac-dwmac ff4e0000.ethernet: init for RMII
    
42. [    1.330088] stmmac - user ID: 0x10, Synopsys ID: 0x35

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my:

1. [    1.115818] pwm-regulator vdd-core: lookup for GPIO enable failed
   
2. [    1.116614] Serial: 8250/16550 driver, 5 ports, IRQ sharing disabled
   
3. [    1.119964] [drm] Initialized drm 1.1.0 20060810
   
4. [    1.120073] random: nonblocking pool is initialized
   
5. [    1.122757] Unable to detect cache hierarchy for CPU 0
   
6. [    1.130107] loop: module loaded
   
7. [    1.130362] SCSI Media Changer driver v0.25
   
8. *******************************************
   
9. [    1.131067] register spi return v = :0
   
10. [    1.131143] lora1276 register spi return v = :0
    
11. [    1.131196] CAN device driver interface

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original

1. / # find . | grep wk2xxx
   
2. ./sys/bus/spi/drivers/wk2xxxspi
   
3. ./sys/bus/spi/drivers/wk2xxxspi/bind
   
4. ./sys/bus/spi/drivers/wk2xxxspi/spi0.0
   
5. ./sys/bus/spi/drivers/wk2xxxspi/uevent
   
6. ./sys/bus/spi/drivers/wk2xxxspi/unbind
   
7. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00
   
8. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/reg
   
9. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/name
   
10. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/cs-gpio
    
11. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/power-gpio
    
12. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/compatible
    
13. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/spi-max-frequency
    
14. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/irq-gpio
    
15. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/reset-gpio
    
16. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/status
    
17. ./sys/firmware/devicetree/base/spi@ff120000/spi_wk2xxx@00/phandle
    
18. ./sys/firmware/devicetree/base/__symbols__/spi_wk2xxx

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my

1. / # find . | grep wk2xxx
   
2. find: ./proc/880: No such file or directory
   
3. ./sys/bus/spi/drivers/wk2xxxspi
   
4. ./sys/bus/spi/drivers/wk2xxxspi/bind
   
5. ./sys/bus/spi/drivers/wk2xxxspi/uevent
   
6. ./sys/bus/spi/drivers/wk2xxxspi/unbind

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Therefore device driver is present in my build, but it totally refuses to see the hardware.

Before this driver initialization in the kernel log, there's something else missing in my build:

1. [    0.455758] of_get_named_gpiod_flags: parsed 'gpio' property of node '/vcc3v3-4g-power-regulator[0]' - status (0)
   
2. [    0.456329] of_get_named_gpiod_flags: parsed 'gpio' property of node '/vcc3v3-4g-reset-regulator[0]' - status (0)
   
3. 
   

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Firefly

So the device you're using is iHC-3308GW?

EugenyB1

Firefly Posted at 7/8/2023 09:36
So the device you're using is iHC-3308GW?

Yes, and I have built clear firmware using https://gitlab.com/TeeFirefly/rk3308-linux, and sWK files do not appear. I am now following instruction at here https://wiki.t-firefly.com/en/Core-3308Y/linux_compile.html. This instruction has several issues:
1. the following code assumes files were extracted in order 0 1 2 3 ...

1. cat path/to/rk3308_linux_release_v1.5.0a_20221212_split_dir/*firefly_split* | tar -xzv

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If they are not, execution fails.
2. The following must be performed within rk* directory, but there's no cd command in the instruction

1. .repo/repo/repo sync -l

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EugenyB1

Update: confirmed that compiling from this distribution with application of those instructions produce working image with sWK* files.
Now second issue remains: why

1. echo "aaa" > /dev/ttyswK0

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does not produce any waveform in the rs485_1 port.

895816514

Please send me log.

1. cat /proc/version

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895816514

The kernel I compiled using this configuration file is no problem. Do you have ttysWk with buildroot now?

1. ll device/rockchip/.BoardConfig.mk
   
2. device/rockchip/.BoardConfig.mk -> rk3308/ihc-3308gw-ubuntu.mk

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EugenyB1

Yes, I have these device files now.

But I have another problem.

./build.sh script does not compile and include my application. "make menuconfig" does not work from the project root, it works from buildroot/, and I compile my package using make in buildroot/, but ./build.sh anyway does not include the package.
I have put my package into buildroot/package/, and into external/ with no difference.

How to properly install the custom package into the compilation of your buildroot image?
Edit: found instructions here https://wiki.t-firefly.com/en/Firefly-Linux-Guide/manual_buildroot.html in 11.2.

895816514

The ./build.sh script will use this firefly_rk3308_release config, so your "make menuconfig" is invalid, you can modify firefly_rk3308_release config or "make menuconfig", and compile manually under buildroot.

1. Linux/3308/device/rockchip/rk3308$ cat BoardConfig_RK3308B_firefly.mk | grep RK_CFG_BUILDROOT
   
2. export RK_CFG_BUILDROOT=firefly_rk3308_release

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