Hello,

After few minor modification USB driver(Brad parker's)
seems to be working in host mode on MPC823E.

Now if i want to reuse the same driver for slave mode ..
apart from appropiate programming of USMOD( USB MODE)
register anything else I need to do..?

 from my understanding after going through the manuals only USMOD
need to be touched.

also if somebody has tried to test MPC823E USB in slave
mode (to be connected with a PC)does it need to configured in some
special way , I mean low or high speed mode ...

though i have tried both but PC USB controller is not able to
detect it.

also if this is not the correct method of testing initially
whether slave mode is functioning I would request some knoweledge
here.

Best Regards,


On Fri, 31 May 2002 Christian Schroeder wrote :
>
>Hi all,
>
>I try to play once again with the usb host code for the
>mpc823e.
>
>1. I collected some information from the Internet and the
>linuxppc-
>     embedded mailing list.
>
>2. I downloaded Brad Parkers new usb hci driver (rev. 2) from
>heeltoe.com
>    and integrated it in the kernel sorces (2.4.4) from
>ftp.denx.de
>
>3. I did some modifications specific to the TQM823L board
>(mpc823e chip
>    revision B2)
>    - #define USE_TIMER1_FOR_SOF
>    - #define USE_PA4_CLK4
>    - #undef POLL_FOR_HUB
>
>4. I loaded the IIC/SPI microcode patch from Brads distribution
>and
>    connected the timer1 output to /dreq1 to enable the patch. I
>tried
>    the microcode patch, which is contained in Wolfgang Denks
>kernel
>    source, too - with the same results.
>
>5. I didn't insert delay gates between the USBXRM/USBXRP inputs
>of the
>     mpc823 and the VM/VP outputs of the PDIUSB11A usb
>transceiver. I know,
>     that the mpc850 needs theese delay gates, but I use the
>latest release
>     of the mpc823e (PPC823EZTnnB2) and there's no hint in the
>errata.
>
>6.   I tested some devices and got the following results:
>
>6.1. Booting with no device connected
>
>PPCBoot 1.1.5 (May 28 2002 - 10:23:33)
>
>CPU:   PPC823EZTnnB2 at 50 MHz: 16 kB I-Cache 8 kB D-Cache
>Board: TQM823LDB0A3.200
>DRAM:  16 MB
>FLASH:  8 MB
>In:    serial
>Out:   serial
>Err:   serial
>PCMCIA:   No Card found
>Hit any key to stop autoboot:  0
>ARP broadcast 1
>TFTP from server 194.95.133.21; our IP address is
>194.95.133.100
>Filename '/bdi2000/pImage-tq'.
>Load address: 0x100000
>Loading:
>#################################################################
>          ################################################
>done
>Bytes transferred = 578280 (8d2e8 hex)
>## Booting image at 00100000 ...
>    Image Name:   Linux-2.4.4
>    Created:      2002-05-30  12:58:54 UTC
>    Image Type:   PowerPC Linux Kernel Image (gzip compressed)
>    Data Size:    578216 Bytes = 564 kB = 0 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Uncompressing Kernel Image ... OK
>## Loading RAMDisk Image at 40100000 ...
>    Image Name:   LinuxPPC Ramdisk Image
>    Created:      2001-03-19   8:29:39 UTC
>    Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
>    Data Size:    1999700 Bytes = 1952 kB = 1 MB
>    Load Address: 00000000
>    Entry Point:  00000000
>    Verifying Checksum ... OK
>    Loading Ramdisk to 00dc7000, end 00faf354 ... OK
>Linux version 2.4.4 (root@thor) (gcc version 2.95.2 19991024
>(release)) #2 Thu May 30 14:57:53 CEST 2002
>USB uCode patch installed
>On node 0 totalpages: 4096
>zone(0): 4096 pages.
>zone(1): 0 pages.
>zone(2): 0 pages.
>Kernel command line: root=/dev/ram rw init=/sbin/init
>ip=194.95.133.100:194.95.133.21:194.95.133.126:255.255.255.128
>ram
>disk_size=8192
>Decrementer Frequency: 3125000
>Calibrating delay loop... 49.86 BogoMIPS
>Memory: 12516k available (1092k kernel code, 456k data, 56k init,
>0k highmem)
>Dentry-cache hash table entries: 2048 (order: 2, 16384 bytes)
>Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
>Page-cache hash table entries: 4096 (order: 2, 16384 bytes)
>Inode-cache hash table entries: 1024 (order: 1, 8192 bytes)
>POSIX conformance testing by UNIFIX
>Linux NET4.0 for Linux 2.4
>Based upon Swansea University Computer Society NET3.039
>Starting kswapd v1.8
>CPM UART driver version 0.03
>ttyS0 on SMC1 at 0x0280, BRG2
>pty: 256 Unix98 ptys configured
>Found 2x16bit 4MByte CFI flash device of type AMD/Fujitsu
>standard at 40000000
>Registered flash device /dev/flasha (minor 0, 4 partitions)
>Found 2x16bit 4MByte CFI flash device of type AMD/Fujitsu
>standard at 40400000
>Registered flash device /dev/flashb (minor 8, 2 partitions)
>block: queued sectors max/low 8224kB/2741kB, 64 slots per queue
>RAMDISK driver initialized: 16 RAM disks of 8192K size 1024
>blocksize
>Uniform Multi-Platform E-IDE driver Revision: 6.31
>ide: Assuming 50MHz system bus speed for PIO modes; override with
>idebus=xx
>PCMCIA slot B: phys mem e0000000...ec000000 (size 0c000000)
>No card in slot B: PIPR=ff00ff00
>eth0: CPM ENET Version 0.2 on SCC2, 00:d0:93:00:03:c6
>RAMDISK: Compressed image found at block 0
>Freeing initrd memory: 1952k freed
>usb.c: registered new driver usbdevfs
>usb.c: registered new driver hub
>m8xxhci: initializing controller
>m8xxhci_setup()
>usb.c: new USB bus registered, assigned bus number 1
>m8xxhci_start_controller()
>m8xxhci: MPC823e (mask 1)
>m8xxhci: USING CLK4 for USB clock!
>m8xxhci: ring sizes: rx 32, tx 40
>m8xxhci: enable USB controller
>m8xxhci_timer_setup()
>m8xxhci: timer, intfreq 50, busfreq 50, count 3125
>m8xxhci: USING TIMER1 FOR SOF!
>m8xxhci: timer1 started
>m8xxhci: usb bus is NOT idle
>hub.c: USB hub found
>hub.c: 1 port detected
>rh_submit_urb() int pipe
>rh_port_power(1)
>m8xxhci: initializing done
>usb.c: registered new driver usb_mouse
>usb.c: registered new driver keyboard
>NET4: Linux TCP/IP 1.0 for NET4.0
>IP Protocols: ICMP, UDP, TCP
>IP: routing cache hash table of 512 buckets, 4Kbytes
>TCP: Hash tables configured (established 1024 bind 1024)
>NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
>VFS: Mounted root (ext2 filesystem).
>Freeing unused kernel memory: 56k init
>#
>
>6.2. Connecting a cherry usb keybord (5 port hub integrated)
>
># (connect)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>2
>hub.c: USB hub found
>hub.c: 5 ports detected
>hub.c: USB new device connect on bus1/1/4, assigned device number
>3
>input0: USB HIDBP Keyboard 046a:0001 on on usb1:3.0
># (disconnect)
>usb.c: USB disconnect on device 2
>usb.c: USB disconnect on device 3
>rh_port_enable(0)
>
>6.3. Connecting a Thunderbird 4-port usb hub
>
># (connect)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>2
>usb.c: USB device not responding, giving up (error=-110)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>3
>hub.c: USB hub found
>hub.c: 4 ports detected
># (disconnect)
>usb.c: USB disconnect on device 3
>rh_port_enable(0)
>
>6.4. Connecting a simple usb mouse
>
># (connect)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>2
>usb_control/bulk_msg: timeout
>usb.c: USB device not accepting new address=2 (error=-110)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>3
>usb_control/bulk_msg: timeout
>usb.c: USB device not accepting new address=3 (error=-110)
>rh_port_enable(0)
>#
>(Disconnecting the mouse, the usb bus remains silent)
>
>6.5. Connecting the mouse to the Thunderbird hub and then
>        connecting the hub to the mpc823
>
># (connect)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>2
>usb.c: USB device not responding, giving up (error=-110)
>rh_port_reset(1)
>hub.c: USB new device connect on bus1/1, assigned device number
>3
>hub.c: USB hub found
>hub.c: 4 ports detected
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_hub_status failed
>hub.c: get_port_status(1) failed (err = -110)
>hub.c: get_port_status(1) failed (err = -110)
>hub.c: USB new device connect on bus1/1/1, assigned device number
>4
>input0: Cypress Sem. Cypress USB Mouse on usb1:4.0
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_hub_status failed
>hub.c: get_port_status failed (err = -110)
>hub.c: get_port_status failed (err = -110)
>hub.c: get_hub_status failed
>#
>
>Conclusions and questions:
>
>Obviously my mpc823e detects only high speed devices correctly.
>This is a known behaviour of the mpc850, but i thought, that
>the
>mpc823 also can work with low speed devices. Did anyone notice
>this behaviour too ???
>
>What about the error (-110) connecting the Thunderbird hub ???
>Sometimes the hub is detected, sometimes not. A mouse, con-
>nected to one of the slave ports of the Thunderbird hub is
>detected
>only sometimes and everytime with errors.
>Now, I'm not sure if the USB driver works correctly or not anf
>if
>I need to insert the delay gates or not ... ??? What can I do
>to
>make  driver  more stable ????
>
>I could never receive a character from the usb keyboard,
>althoug
>it was detected correctly everytime. Is there a simple test
>program,
>to check if a usb device in not only detected correctly, but can
>ex-
>change data with the usb host ???
>
>any help would be greatly appreciated.
>
>Christian Schroeder
>
>
>Dr.-Ing. Christian Schroeder
>Institut fuer Mikroelektronik- und Mechatronik-Systeme
>Langewiesener Strasse 22
>98693 Ilmenau
>Telefon: +49 3677 678315
>Telefax: +49 3677 678337
>Mobil:   +49 173 5789172
>e-mail:  christian.schroeder@imms.de
>www:     http://www.imms.de/~christi/cs.html
>pgp:     finger christi@finger.imms.de
>
>
>


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