I have a problem adding an uart to the PL for Minized Petalinux project, auart16550 is added to vivado project and exported to petalinux by doing
petalinux-config --get-hw-description=<my_hdf.sdk folder>
Project build successfully.
Boot image shows the uart16550
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
43c10000.serial: ttyS3 at MMIO 0x43c11000 (irq = 166, base_baud = 3000000) is a 16550A
43c00000.serial: ttyS0 at MMIO 0x43c01000 (irq = 167, base_baud = 3000000) is a 16550A
e0000000.serial: ttyPS1 at MMIO 0xe0000000 (irq = 143, base_baud = 6249999) is a xuartps
e0001000.serial: ttyPS0 at MMIO 0xe0001000 (irq = 144, base_baud = 6249999) is a xuartp
43c00000 is the bluetooth uart.
43c10000 is my new uart16550 IP.
I have added to recipes-kernel under meta-user the following
#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_SERIAL_OF_PLATFORM=y
The device tree under meta-user (system-user.dtsi)
&axi_uart16550_0 {
status = "okay";
port-number = <3>;
current-speed = <57600>;
xlnx,use-modem-ports = <0x0>;
xlnx,use-user-ports = <0x0>;
};
and the generated .dts file for uart16550 becomes
serial@43c10000 {
clock-frequency = <0x2dc6c00>;
clock-names = "ref_clk";
clocks = <0x1 0x0>;
compatible = "xlnx,xps-uart16550-2.00.a", "ns16550a";
current-speed = <0xe100>;
device_type = "serial";
interrupt-parent = <0x4>;
interrupts = <0x0 0x1f 0x4>;
port-number = <0x3>;
reg = <0x43c10000 0x10000>;
reg-offset = <0x1000>;
reg-shift = <0x2>;
xlnx,external-xin-clk-hz = <0x2dc6c00>;
xlnx,external-xin-clk-hz-d = <0x30>;
xlnx,has-external-rclk = <0x0>;
xlnx,has-external-xin = <0x1>;
xlnx,is-a-16550 = <0x1>;
xlnx,s-axi-aclk-freq-hz-d = "100.0";
xlnx,use-modem-ports = <0x0>;
xlnx,use-user-ports = <0x0>;
status = "okay";
};
After logging in, I can see there is no issue with any kernel module (2017.2 version tool) and my serial list correctly
root@MiniZed:~# lsmod
Not tainted
uio_pdrv_genirq 2754 0 - Live 0xbf000000
root@MiniZed:~# dmesg | grep serial
43c10000.serial: ttyS3 at MMIO 0x43c11000 (irq = 166, base_baud = 3000000) is a 16550A
43c00000.serial: ttyS0 at MMIO 0x43c01000 (irq = 167, base_baud = 3000000) is a 16550A
e0000000.serial: ttyPS1 at MMIO 0xe0000000 (irq = 143, base_baud = 6249999) is a xuartps
e0001000.serial: ttyPS0 at MMIO 0xe0001000 (irq = 144, base_baud = 6249999) is a xuartps
root@MiniZed:~# echo 123 > /dev/ttyS0
Then when trying to echo anything I got this
root@MiniZed:~# echo 123 > /dev/ttyS3
Unhandled fault: imprecise external abort (0x406) at 0xb6fa9e40
pgd = c7b30000
[b6fa9e40] *pgd=07a8d831, *pte=05b7775f, *ppte=05b77c7f
Internal error: Oops - BUG: 406 [#1] PREEMPT SMP ARM
Modules linked in: uio_pdrv_genirq
CPU: 0 PID: 1273 Comm: sh Not tainted 4.9.0-xilinx-v2017.2 #1
Hardware name: Xilinx Zynq Platform
task: de6cb980 task.stack: c7bc6000
PC is at mem_serial_in+0x18/0x1c
LR is at serial8250_do_startup+0x190/0x63c
pc : [<c0362288>] lr : [<c0364580>] psr: 60000013
sp : c7bc7d80 ip : 00000000 fp : 00000000
r10: 00020241 r9 : de7e1940 r8 : c7b5e800
r7 : 00000000 r6 : c0a629a8 r5 : 00000000 r4 : c0a629a8
r3 : e0910000 r2 : 00000002 r1 : e0910014 r0 : 00000000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 18c5387d Table: 07b3004a DAC: 00000051
Process sh (pid: 1273, stack limit = 0xc7bc6210)
Stack: (0xc7bc7d80 to 0xc7bc8000)
7d80: de7ddaf4 00000000 c0a629a8 00000000 c7b5e800 de7e1940 00020241 c035ef00
7da0: 00000000 c7b5e800 de7ddb88 c7a6c780 c7bc6000 c0360948 de7ddaf4 c7b5e800
7dc0: de7ddb88 c034fdf4 c7b5e800 c780ed80 c7a6c780 00400043 c7bc6000 c035fb28
7de0: c7b5e800 c0349ca4 de7e1940 00000003 00000000 de5a0a00 00000000 de7e1940
7e00: c072cba4 c7a6c780 c7bc6000 00000000 00000000 c01d18d0 de7e1940 00000000
7e20: c7a6c780 de7e1940 00000000 c01d178c c7a6c788 c01cb990 c7bc7ed0 00000000
7e40: 00000000 c7a6c780 00020241 c7bc6000 00000000 c01dabc0 bedffa74 c019887c
7e60: c7bc7f74 00000000 00020241 de425ab8 000081b6 00000041 de001440 00000002
7e80: 00000040 c7bc7ed8 00000000 00000000 de7e1940 de6b4190 de0a3aa0 00000000
7ea0: c7bc7ea0 c7bc7ea0 00000004 00000003 c7bc7f74 00000001 ffffff9c c0106e24
7ec0: c7bc6000 00000000 bedffa74 c01daf4c de6b4190 de0a3aa0 426ab25c 00000005
7ee0: de531015 024000c0 00000000 de001770 de7e1940 00000301 00000000 0000003a
7f00: 00000000 00000000 00000000 c7bc7f10 de400380 024000c0 a0000013 00101708
7f20: 00000000 00000000 00000003 c742c6c0 c7b51700 c7b51740 00020241 c01e724c
7f40: de531000 00000000 00020241 00000002 ffffff9c c0106e24 00000003 00020241
7f60: de531000 c01cc948 c7bc6000 bedff1f0 00000051 00020241 c01081b6 00000002
7f80: 00000300 00000001 00000000 00000241 00000000 00000001 00000005 c0106e24
7fa0: c7bc6000 c0106c60 00000241 00000000 00101708 00020241 000001b6 00000000
7fc0: 00000241 00000000 00000001 00000005 00000003 00101708 b6fd5880 bedffa74
7fe0: 000e32ec bedff930 000765a4 b6eee888 60000010 00101708 1eff6861 1eff6c61
[<c0362288>] (mem_serial_in) from [<c0364580>] (serial8250_do_startup+0x190/0x63c)
[<c0364580>] (serial8250_do_startup) from [<c035ef00>] (uart_port_startup+0x74/0x104)
[<c035ef00>] (uart_port_startup) from [<c0360948>] (uart_port_activate+0x48/0x6c)
[<c0360948>] (uart_port_activate) from [<c034fdf4>] (tty_port_open+0x7c/0xbc)
[<c034fdf4>] (tty_port_open) from [<c035fb28>] (uart_open+0x30/0x38)
[<c035fb28>] (uart_open) from [<c0349ca4>] (tty_open+0x10c/0x47c)
[<c0349ca4>] (tty_open) from [<c01d18d0>] (chrdev_open+0x144/0x15c)
[<c01d18d0>] (chrdev_open) from [<c01cb990>] (do_dentry_open.constprop.3+0x224/0x2e0)
[<c01cb990>] (do_dentry_open.constprop.3) from [<c01dabc0>] (path_openat+0x9a4/0xd00)
[<c01dabc0>] (path_openat) from [<c01daf4c>] (do_filp_open+0x30/0x78)
[<c01daf4c>] (do_filp_open) from [<c01cc948>] (do_sys_open+0xe8/0x1ac)
[<c01cc948>] (do_sys_open) from [<c0106c60>] (ret_fast_syscall+0x0/0x3c)
Code: e0831211 e5d10000 e6ef0070 f57ff04f (e12fff1e)
---[ end trace ae9403c8fd40899c ]---
/bin/start_getty: line 8: 1273 Segmentation fault /sbin/getty -L $1 $2
Does someone have sucessfully used an uart16550 under Minized using petalinux?
Will appreciate comments,
