Hi Niklas,
Thanks for the feedback.
> Subject: Re: [PATCH v3 3/3] serial: 8250_em: Add serial_out() to struct
> serial8250_em_hw_info
>
> Hi Biju,
>
> On 2023-02-13 13:01:06 +0000, Biju Das wrote:
> > Please get files from here
> >
>
> Thanks for the branch.
>
> It boots and the serial console appears to be functioning as expected.
> Is there anything in particular you like me to test? I attach the full boot
> log in case it's useful for you.
Cool. It should be OK. Looks like RZ/V2M changes applies to EMMA mobile as well.
If you have cables, you could test {ttyS0, ttyS2, ttyS2} at {9600, 19200, 38400, 57600, 115200} bps
If it supports flow control, check that as well.
Eg:
stty -F /dev/ttyS0 115200
stty -F /dev/ttyS0 115200 crtscts
Open a teraterm and do below read/write testing
cat /dev/ttyS0 --> for reading
echo test > /dev/ttyS0 --> for writing
or Write a serial test program for read/write test on above baud rates.
If the cable is not available, you could also verify register settings
To check whether it matches with EMMA hardware manual.
dump() {
devmem2 0xA4040000 | grep Read
devmem2 0xA4040004 | grep Read
devmem2 0xA4040008 | grep Read
devmem2 0xA404000C | grep Read
devmem2 0xA4040010 | grep Read
devmem2 0xA4040014 | grep Read
devmem2 0xA4040018 | grep Read
devmem2 0xA404001C | grep Read
devmem2 0xA4040020 | grep Read
devmem2 0xA4040024 | grep Read # DLAB(LCR[7]) 0x1B
devmem2 0xA4040028 | grep Read # DLAB(LCR[7]) 0x1B
devmem2 0xA404002C | grep Read
devmem2 0xA4040030 | grep Read
devmem2 0xA4040034 | grep Read
}
dump
Cheers,
Biju
>
> [ 0.000000] Booting Linux on physical CPU 0x0
> [ 0.000000] Linux version 6.2.0-rc7-next-20230210-12179-g91bd68019b4b
> (neg@sleipner) (arm-linux-gnueabihf-gcc (GCC) 10.2.0, GNU ld (GNU Binutils)
> 2.35.1) #2 SMP Mon Feb 13 15:02:12 CET 2023
> [ 0.000000] CPU: ARMv7 Processor [411fc092] revision 2 (ARMv7),
> cr=10c5387d
> [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
> instruction cache
> [ 0.000000] OF: fdt: Machine model: EMEV2 KZM9D Board
> [ 0.000000] printk: debug: ignoring loglevel setting.
> [ 0.000000] Memory policy: Data cache writealloc
> [ 0.000000] cma: Failed to reserve 128 MiB
> [ 0.000000] Zone ranges:
> [ 0.000000] Normal [mem 0x0000000040000000-0x0000000047ffffff]
> [ 0.000000] HighMem empty
> [ 0.000000] Movable zone start for each node
> [ 0.000000] Early memory node ranges
> [ 0.000000] node 0: [mem 0x0000000040000000-0x0000000047ffffff]
> [ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-
> 0x0000000047ffffff]
> [ 0.000000] percpu: Embedded 14 pages/cpu s33620 r0 d23724 u57344
> [ 0.000000] pcpu-alloc: s33620 r0 d23724 u57344 alloc=14*4096
> [ 0.000000] pcpu-alloc: [0] 0 [0] 1
> [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 32512
> [ 0.000000] Kernel command line: ignore_loglevel rw root=/dev/nfs ip=on
> [ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536
> bytes, linear)
> [ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes,
> linear)
> [ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
> [ 0.000000] Memory: 116068K/131072K available (8192K kernel code, 1150K
> rwdata, 2596K rodata, 1024K init, 251K bss, 15004K reserved, 0K cma-
> reserved, 0K highmem)
> [ 0.000000] trace event string verifier disabled
> [ 0.000000] rcu: Hierarchical RCU implementation.
> [ 0.000000] rcu: RCU event tracing is enabled.
> [ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=8 to
> nr_cpu_ids=2.
> [ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10
> jiffies.
> [ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
> [ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
> [ 0.000000] GIC: enabling workaround for broken byte access
> [ 0.000000] rcu: srcu_init: Setting srcu_struct sizes based on
> contention.
> [ 0.000000] timer_probe: no matching timers found
> [ 0.000000] Console: colour dummy device 80x30
> [ 0.000000] printk: console [tty0] enabled
> [ 0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps
> every 21474836475000000ns
> [ 0.000000] Calibrating delay loop (skipped) preset value.. 1066.00
> BogoMIPS (lpj=5330000)
> [ 0.000000] pid_max: default: 32768 minimum: 301
> [ 0.000000] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes,
> linear)
> [ 0.000000] Mountpoint-cache hash table entries: 1024 (order: 0, 4096
> bytes, linear)
> [ 0.000000] CPU: Testing write buffer coherency: ok
> [ 0.000000] CPU0: Spectre v2: using BPIALL workaround
> [ 0.000000] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [ 0.000000] Setting up static identity map for 0x40100000 - 0x40100060
> [ 0.000000] rcu: Hierarchical SRCU implementation.
> [ 0.000000] rcu: Max phase no-delay instances is 1000.
> [ 0.000000] smp: Bringing up secondary CPUs ...
> [ 0.000000] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
> [ 0.000000] CPU1: Spectre v2: using BPIALL workaround
> [ 0.000000] smp: Brought up 1 node, 2 CPUs
> [ 0.000000] SMP: Total of 2 processors activated (2132.00 BogoMIPS).
> [ 0.000000] CPU: All CPU(s) started in SVC mode.
> [ 0.000000] devtmpfs: initialized
> [ 0.000000] VFP support v0.3: implementor 41 architecture 3 part 30
> variant 9 rev 1
> [ 0.000000] clocksource: jiffies: mask: 0xffffffff max_cycles:
> 0xffffffff, max_idle_ns: 19112604462750000 ns
> [ 0.000000] futex hash table entries: 512 (order: 3, 32768 bytes, linear)
> [ 0.000000] pinctrl core: initialized pinctrl subsystem
> [ 0.000000] NET: Registered PF_NETLINK/PF_ROUTE protocol family
> [ 0.000000] DMA: preallocated 256 KiB pool for atomic coherent
> allocations
> [ 0.000000] thermal_sys: Registered thermal governor 'step_wise'
> [ 0.000000] No ATAGs?
> [ 0.000000] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1
> watchpoint registers.
> [ 0.000000] hw-breakpoint: maximum watchpoint size is 4 bytes.
> [ 0.000000] sh-pfc e0140200.pinctrl: emev2_pfc support registered
> [ 0.000000] SCSI subsystem initialized
> [ 0.000000] libata version 3.00 loaded.
> [ 0.000000] usbcore: registered new interface driver usbfs
> [ 0.000000] usbcore: registered new interface driver hub
> [ 0.000000] usbcore: registered new device driver usb
> [ 0.000000] mc: Linux media interface: v0.10
> [ 0.000000] videodev: Linux video capture interface: v2.00
> [ 0.000000] pps_core: LinuxPPS API ver. 1 registered
> [ 0.000000] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo
> Giometti <giometti@xxxxxxxx>
> [ 0.000000] PTP clock support registered
> [ 0.000000] em_sti e0180000.timer: used for clock events
> [ 0.000000] em_sti e0180000.timer: used for oneshot clock events
> [ 0.000000] em_sti e0180000.timer: used as clock source
> [ 0.000000] clocksource: e0180000.timer: mask: 0xffffffffffff max_cycles:
> 0x1ef4687b1, max_idle_ns: 112843571739654 ns
> [ 0.000000] Advanced Linux Sound Architecture Driver Initialized.
> [ 0.000000] vgaarb: loaded
> [ 0.890000] clocksource: Switched to clocksource e0180000.timer
> [ 0.900000] Clockevents: could not switch to one-shot mode:
> [ 0.900000] Clockevents: could not switch to one-shot mode: dummy_timer
> is not functional.
> [ 0.900000] dummy_timer is not functional.
> [ 0.910000] NET: Registered PF_INET protocol family
> [ 0.910000] IP idents hash table entries: 2048 (order: 2, 16384 bytes,
> linear)
> [ 0.910000] tcp_listen_portaddr_hash hash table entries: 512 (order: 0,
> 4096 bytes, linear)
> [ 0.910000] Table-perturb hash table entries: 65536 (order: 6, 262144
> bytes, linear)
> [ 0.910000] TCP established hash table entries: 1024 (order: 0, 4096
> bytes, linear)
> [ 0.910000] TCP bind hash table entries: 1024 (order: 2, 16384 bytes,
> linear)
> [ 0.910000] TCP: Hash tables configured (established 1024 bind 1024)
> [ 0.910000] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
> [ 0.910000] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes,
> linear)
> [ 0.910000] NET: Registered PF_UNIX/PF_LOCAL protocol family
> [ 0.910000] RPC: Registered named UNIX socket transport module.
> [ 0.910000] RPC: Registered udp transport module.
> [ 0.910000] RPC: Registered tcp transport module.
> [ 0.910000] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [ 0.910000] PCI: CLS 0 bytes, default 64
> [ 0.950000] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7
> counters available
> [ 0.950000] workingset: timestamp_bits=30 max_order=15 bucket_order=0
> [ 0.950000] NFS: Registering the id_resolver key type
> [ 0.950000] Key type id_resolver registered
> [ 0.950000] Key type id_legacy registered
> [ 0.950000] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
> [ 0.950000] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver
> Registering...
> [ 0.960000] Block layer SCSI generic (bsg) driver version 0.4 loaded
> (major 246)
> [ 0.960000] io scheduler mq-deadline registered
> [ 0.960000] io scheduler kyber registered
> [ 0.960000] io scheduler bfq registered
> [ 0.970000] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
> [ 0.970000] e1020000.serial: ttyS0 at MMIO 0xe1020000 (irq = 37,
> base_baud = 796444) is a TI16750
> [ 0.970000] e1030000.serial: ttyS1 at MMIO 0xe1030000 (irq = 38,
> base_baud = 7168000) is a TI16750
> [ 0.970000] printk: console [ttyS1] enabled
> [ 1.660000] e1040000.serial: ttyS2 at MMIO 0xe1040000 (irq = 39,
> base_baud = 14336000) is a TI16750
> [ 1.670000] e1050000.serial: ttyS3 at MMIO 0xe1050000 (irq = 40,
> base_baud = 2389333) is a TI16750
> [ 1.680000] SuperH (H)SCI(F) driver initialized
> [ 1.700000] CAN device driver interface
> [ 1.760000] smsc911x 20000000.ethernet eth0: MAC Address:
> 00:0a:a3:02:12:92
> [ 1.770000] UDC core: g_ether: couldn't find an available UDC
> [ 1.770000] i2c_dev: i2c /dev entries driver
> [ 1.780000] em-i2c e0070000.i2c: Added i2c controller 0, irq 42
> [ 1.790000] em-i2c e10a0000.i2c: Added i2c controller 1, irq 43
> [ 1.800000] cpu cpu0: OPP table can't be empty
> [ 1.800000] usbcore: registered new interface driver usbhid
> [ 1.810000] usbhid: USB HID core driver
> [ 1.820000] NET: Registered PF_INET6 protocol family
> [ 1.820000] Segment Routing with IPv6
> [ 1.830000] In-situ OAM (IOAM) with IPv6
> [ 1.830000] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
> [ 1.840000] NET: Registered PF_PACKET protocol family
> [ 1.840000] can: controller area network core
> [ 1.850000] NET: Registered PF_CAN protocol family
> [ 1.850000] can: raw protocol
> [ 1.860000] can: broadcast manager protocol
> [ 1.860000] can: netlink gateway - max_hops=1
> [ 1.870000] Key type dns_resolver registered
> [ 1.870000] Registering SWP/SWPB emulation handler
> [ 1.900000] input: gpio_keys as /devices/platform/gpio_keys/input/input0
> [ 1.960000] SMSC LAN8700 20000000.ethernet-ffffffff:01: attached PHY
> driver (mii_bus:phy_addr=20000000.ethernet-ffffffff:01, irq=POLL)
> [ 2.000000] smsc911x 20000000.ethernet eth0: SMSC911x/921x identified at
> 0xc8920000, IRQ: 41
> [ 4.080000] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> [ 4.130000] Sending DHCP requests ., OK
> [ 4.170000] IP-Config: Got DHCP answer from 10.0.1.1, my address is
> 10.0.1.2
> [ 4.180000] IP-Config: Complete:
> [ 4.180000] device=eth0, hwaddr=00:0a:a3:02:12:92, ipaddr=10.0.1.2,
> mask=255.255.255.0, gw=10.0.1.1
> [ 4.190000] host=10.0.1.2, domain=dyn.berto.se, nis-domain=(none)
> [ 4.200000] bootserver=10.0.1.1, rootserver=10.0.1.1,
> rootpath=/srv/nfs4/arch,tcp,v3
> [ 4.200000] nameserver0=192.168.20.1
> [ 4.210000] ALSA device list:
> [ 4.210000] No soundcards found.
> [ 4.240000] VFS: Mounted root (nfs filesystem) on device 0:15.
> [ 4.240000] devtmpfs: mounted
> [ 4.250000] Freeing unused kernel image (initmem) memory: 1024K
> [ 4.290000] Run /sbin/init as init process
> [ 4.290000] with arguments:
> [ 4.290000] /sbin/init
> [ 4.300000] with environment:
> [ 4.300000] HOME=/
> [ 4.300000] TERM=linux
> [ 5.980000] systemd[1]: System time before build time, advancing clock.
> [ 6.030000] systemd[1]: Failed to find module 'autofs4'
> [ 6.160000] systemd[1]: systemd 252.5-1-arch running in system mode (+PAM
> +AUDIT -SELINUX -APPARMOR -IMA +SMACK +SECCOMP +GCRYPT +GNUTLS +OPENSSL +ACL
> +BLKID +CURL +ELFUTILS +FIDO2 +IDN2 -IDN +IPTC +KMOD +LIBCRYPTSETUP
> +LIBFDISK +PCRE2 -PWQUALITY +P11KIT -QRENCODE +TPM2 +BZIP2 +LZ4 +XZ +ZLIB
> +ZSTD +BPF_FRAMEWORK +XKBCOMMON +UTMP -SYSVINIT default-hierarchy=unified)
> [ 6.190000] systemd[1]: Detected architecture arm.
> [ 6.260000] systemd[1]: Hostname set to <arm>.
> [ 6.510000] systemd[1]: bpf-lsm: BPF LSM hook not enabled in the kernel,
> BPF LSM not supported
> [ 6.520000] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=1
> 'systemd'
> [ 8.810000] systemd[1]: Queued start job for default target Graphical
> Interface.
> [ 8.830000] systemd[1]: Created slice Slice /system/getty.
> [ 8.870000] systemd[1]: Created slice Slice /system/modprobe.
> [ 8.910000] systemd[1]: Created slice Slice /system/serial-getty.
> [ 8.950000] systemd[1]: Created slice User and Session Slice.
> [ 8.990000] systemd[1]: Started Dispatch Password Requests to Console
> Directory Watch.
> [ 9.030000] systemd[1]: Started Forward Password Requests to Wall
> Directory Watch.
> [ 9.070000] systemd[1]: Arbitrary Executable File Formats File System
> Automount Point was skipped because of an unmet condition check
> (ConditionPathExists=/proc/sys/fs/binfmt_misc).
> [ 9.080000] systemd[1]: Reached target Local Encrypted Volumes.
> [ 9.120000] systemd[1]: Reached target Local Integrity Protected Volumes.
> [ 9.160000] systemd[1]: Reached target Network is Online.
> [ 9.200000] systemd[1]: Reached target Path Units.
> [ 9.240000] systemd[1]: Reached target Slice Units.
> [ 9.280000] systemd[1]: Reached target Swaps.
> [ 9.320000] systemd[1]: Reached target Local Verity Protected Volumes.
> [ 9.360000] systemd[1]: Listening on Device-mapper event daemon FIFOs.
> [ 9.420000] systemd[1]: Listening on Process Core Dump Socket.
> [ 9.460000] systemd[1]: Journal Audit Socket was skipped because of an
> unmet condition check (ConditionSecurity=audit).
> [ 9.470000] systemd[1]: Listening on Journal Socket (/dev/log).
> [ 9.510000] systemd[1]: Listening on Journal Socket.
> [ 9.550000] systemd[1]: Listening on udev Control Socket.
> [ 9.590000] systemd[1]: Listening on udev Kernel Socket.
> [ 9.630000] systemd[1]: Huge Pages File System was skipped because of an
> unmet condition check (ConditionPathExists=/sys/kernel/mm/hugepages).
> [ 9.640000] systemd[1]: POSIX Message Queue File System was skipped
> because of an unmet condition check
> (ConditionPathExists=/proc/sys/fs/mqueue).
> [ 9.710000] systemd[1]: Mounting /root/shared...
> [ 9.750000] systemd[1]: Mounting Kernel Debug File System...
> [ 9.790000] systemd[1]: Mounting Kernel Trace File System...
> [ 9.850000] systemd[1]: Mounting Temporary Directory /tmp...
> [ 9.900000] systemd[1]: Create List of Static Device Nodes was skipped
> because of an unmet condition check
> (ConditionFileNotEmpty=/lib/modules/6.2.0-rc7-next-20230210-12179-
> g91bd68019b4b/modules.devname).
> [ 9.960000] systemd[1]: Starting Load Kernel Module configfs...
> [ 9.990000] systemd[1]: Starting Load Kernel Module drm...
> [ 10.040000] systemd[1]: Starting Load Kernel Module fuse...
> [ 10.120000] systemd[1]: Load Kernel Modules was skipped because no
> trigger condition checks were met.
> [ 10.210000] systemd[1]: Starting Remount Root and Kernel File Systems...
> [ 10.250000] systemd[1]: Repartition Root Disk was skipped because no
> trigger condition checks were met.
> [ 10.270000] systemd[1]: Starting Apply Kernel Variables...
> [ 10.360000] systemd[1]: Starting Coldplug All udev Devices...
> [ 10.440000] systemd[1]: Mounted Kernel Debug File System.
> [ 10.480000] systemd[1]: Mounted Kernel Trace File System.
> [ 10.510000] systemd[1]: Mounted Temporary Directory /tmp.
> [ 10.560000] systemd[1]: modprobe@configfs.service: Deactivated
> successfully.
> [ 10.570000] systemd[1]: Finished Load Kernel Module configfs.
> [ 10.640000] systemd[1]: modprobe@drm.service: Deactivated successfully.
> [ 10.660000] systemd[1]: Finished Load Kernel Module drm.
> [ 10.680000] systemd[1]: modprobe@fuse.service: Deactivated successfully.
> [ 10.690000] systemd[1]: Finished Load Kernel Module fuse.
> [ 10.730000] systemd[1]: Finished Remount Root and Kernel File Systems.
> [ 10.770000] systemd[1]: Finished Apply Kernel Variables.
> [ 10.810000] systemd[1]: FUSE Control File System was skipped because of
> an unmet condition check (ConditionPathExists=/sys/fs/fuse/connections).
> [ 10.880000] systemd[1]: Mounting Kernel Configuration File System...
> [ 10.920000] systemd[1]: First Boot Wizard was skipped because of an unmet
> condition check (ConditionFirstBoot=yes).
> [ 10.930000] systemd[1]: Rebuild Hardware Database was skipped because of
> an unmet condition check (ConditionNeedsUpdate=/etc).
> [ 10.980000] systemd[1]: Starting Load/Save Random Seed...
> [ 11.010000] systemd[1]: Create System Users was skipped because no
> trigger condition checks were met.
> [ 11.030000] systemd[1]: Starting Create Static Device Nodes in /dev...
> [ 11.100000] systemd[1]: Mounted Kernel Configuration File System.
> [ 11.500000] systemd[1]: Reached target Host and Network Name Lookups.
> [ 11.540000] systemd[1]: Listening on RPCbind Server Activation Socket.
> [ 11.580000] systemd[1]: Reached target RPC Port Mapper.
> [ 11.650000] systemd[1]: Starting NFS status monitor for NFSv2/3
> locking....
> [ 11.830000] systemd[1]: Finished Coldplug All udev Devices.
> [ 11.930000] systemd[1]: Starting RPC Bind...
> [ 12.270000] systemd[1]: Finished Create Static Device Nodes in /dev.
> [ 12.310000] systemd[1]: Reached target Preparation for Local File
> Systems.
> [ 12.350000] systemd[1]: Virtual Machine and Container Storage
> (Compatibility) was skipped because of an unmet condition check
> (ConditionPathExists=/var/lib/machines.raw).
> [ 12.370000] systemd[1]: Reached target Local File Systems.
> [ 12.410000] systemd[1]: Entropy Daemon based on the HAVEGE algorithm was
> skipped because of an unmet condition check (ConditionKernelVersion=<5.6).
> [ 12.430000] systemd[1]: Rebuild Dynamic Linker Cache was skipped because
> no trigger condition checks were met.
> [ 12.490000] systemd[1]: Starting Notify NFS peers of a restart...
> [ 12.540000] systemd[1]: Set Up Additional Binary Formats was skipped
> because no trigger condition checks were met.
> [ 12.550000] systemd[1]: systemd-journald.service: unit configures an IP
> firewall, but the local system does not support BPF/cgroup firewalling.
> [ 12.570000] systemd[1]: (This warning is only shown for the first unit
> using IP firewalling.)
> [ 12.620000] systemd[1]: Starting Journal Service...
> [ 12.690000] systemd[1]: Starting Rule-based Manager for Device Events and
> Files...
> [ 12.750000] systemd[1]: Started RPC Bind.
> [ 12.800000] systemd[1]: Started Notify NFS peers of a restart.
> [ 12.870000] systemd[1]: Started NFS status monitor for NFSv2/3 locking..
> [ 13.180000] systemd[1]: Started Journal Service.
> [ 17.010000] systemd-journald[86]: Received client request to flush
> runtime journal.
> [ 21.390000] random: dbus-daemon: uninitialized urandom read (12 bytes
> read)
> [ 22.200000] random: dbus-daemon: uninitialized urandom read (12 bytes
> read)
> [ 51.370000] random: crng init done
>
> --
> Kind Regards,
> Niklas Söderlund
