[U-Boot-Users] Problem on using 16C552 with MPC8xx
Demke, Torsten
Torsten.Demke at fci.com
Wed Mar 3 15:12:11 CET 2004
Hello Sam,
do you really have 32bit (24:8) register access for your 16550?
>fa000000 : 00000100 0360f0ff 00000100 0360f0ff .....
>fa000010 : 00000100 0360f0ff 00000100 0360f0ff .....
That looks more like 8bit.
Please try
#define CFG_NS16550_REG_SIZE 1
Regards,
Torsten
> -----Original Message-----
> From: Sam Song [mailto:samsongshu at yahoo.com.cn]
> Sent: Mittwoch, 3. März 2004 14:49
> To: u-boot-users at lists.sourceforge.net
> Subject: [U-Boot-Users] Problem on using 16C552 with MPC8xx
>
>
> Hi,
>
> I met a problem when debugging a ST16C552 on my custom
> board.The related configuration is as follows:
>
> #define CONFIG_CONS_INDEX 1 /* Added by Sam. Copy
> from OXC board. */
> #undef CONFIG_8xx_CONS_SMC2
> #undef CONFIG_8xx_CONS_NONE
> #define CONFIG_BAUDRATE 9600
>
> #define CFG_UART_BASE 0xFA000000
> #define CFG_NS16550
> #define CFG_NS16550_SERIAL
> #define CFG_NS16550_REG_SIZE -4
> #define CFG_NS16550_CLK 1843200
> #define CFG_NS16550_COM1 CFG_UART_BASE
>
> #define CFG_BR4_PRELIM 0xFA000401 /* UART Chip U10
> */
> #define CFG_OR4_PRELIM 0xFFFF0040
>
> And detailed debug info pls see below.
>
> [root at sgj dmt50-16550]# ppc_8xx-gdb u-boot
> GNU gdb 5.2.1
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General
> Public License, and you are
> welcome to change it and/or distribute copies of it
> under certain conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show
> warranty" for details.
> This GDB was configured as "--host=i686-pc-linux-gnu
> --target=powerpc-hardhat-linux"...
> (gdb) target remote bdi:2001
> Remote debugging using bdi:2001
> boot_warm () at
> /u-boot/dmt50-16550/cpu/mpc8xx/start.S:115
> 115 mtspr SRR1, r3 /*
> Make SRR1 match MSR */
> (gdb) b board_init_f
> Breakpoint 1 at 0xfff086b0: file board.c, line 348.
> (gdb) c
> Continuing.
>
> Breakpoint 1, board_init_f (bootflag=1) at board.c:348
> 348 memset ((void *) gd, 0, sizeof
> (gd_t));
> (gdb) d b
> Delete all breakpoints? (y or n) y
> (gdb) b console_init_f
> Breakpoint 2 at 0xfff132b8: file console.c, line 367.
> (gdb) c
> Continuing.
>
> Breakpoint 2, console_init_f () at console.c:367
> 367 gd->have_console = 1;
> (gdb) d b
> Delete all breakpoints? (y or n) y
> (gdb) b display_options
> Breakpoint 3 at 0xfff14884: file display_options.c,
> line 33.
> (gdb) c
> Continuing.
>
> Breakpoint 3, display_options () at
> display_options.c:33
> 33 printf ("\n\n%s\n\n", version_string);
> (gdb) d b
> Delete all breakpoints? (y or n) y
> (gdb) b serial.c:90
> Breakpoint 4 at 0xfff0b490: file serial.c, line 90.
> (gdb) c
> Continuing.
>
> Breakpoint 4, serial_puts (
> s=0xfa202d40 "\n\nU-Boot 1.0.0 (Mar 3 2004 -
> 19:35:51)\n\n")
> at serial.c:90
> 90 while (*s) {
> (gdb) s
> 91 serial_putc (*s++);
> (gdb) s
> serial_putc (c=10 '\n') at serial.c:81
> 81 if (c == '\n')
> (gdb) s
> 82 NS16550_putc(console, '\r');
> (gdb) s
> NS16550_putc (com_port=0xfa000000, c=13 '\r') at
> ns16550.c:47
> 47 while ((com_port->lsr & LSR_THRE) == 0);
> (gdb) s
>
> [It hanged here.After ctrl~c serval times,it had]
>
> Interrupted while waiting for the program.
> Give up (and stop debugging it)? (y or n) y
> (gdb) Quit
> (gdb) quit
> [root at localhost u-boot-16550]#
>
> ===================================================
> On BDI2000 console:
> BDI>re
> - TARGET: processing user reset request
> - TARGET: resetting target passed
> - TARGET: processing target init list ....
> - TARGET: processing target init list passed
> BDI>bi 0xfff00120
> Breakpoint identification is 0
> BDI>g
> - TARGET: target has entered debug mode
> BDI>i
> Target state : debug mode
> Debug entry cause : instruction breakpoint
> Current PC : 0xfff00120
> BDI>ci
> - TARGET: target has entered debug mode
> - TARGET: target has entered debug mode
> - TARGET: target has entered debug mode
> - TARGET: target has entered debug mode
> - TARGET: target has entered debug mode
> - TARGET: target has entered debug mode
>
> [When U-Boot hanged at ns16550.c,I got some
> information on ST16C552 and MPC8xx Dual RAM]
>
> BDI>i
> Target state : debug mode
> Debug entry cause : trace
> Current PC : 0xfff0cec4
> BDI>m 0
> 00000000 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000010 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000020 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000030 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000040 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000050 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000060 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000070 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000080 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 00000090 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000a0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000b0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000c0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000d0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000e0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> 000000f0 : 03ffffff 03ffffff 03ffffff 03ffffff ....
> BDI>md 0xfa000000
> fa000000 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa000010 : 00000100 0360f0ff 00000100 0360f0ff .....`
> fa000020 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa000030 : 00000100 0360f0ff 00000100 0360f0ff .....`
> fa000040 : 00000100 0360f0ff 00000100 0360f0ff .....`
> fa000050 : 00000100 0360f0ff 00000100 0360f0ff .....`
> fa000060 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa000070 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa000080 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa000090 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000a0 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000b0 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000c0 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000d0 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000e0 : 00000100 0360f0ff 00000100 0360f0ff .....
> fa0000f0 : 00000100 0360f0ff 00000100 0360f0ff .....
> BDI>m 0xfa202d40
> fa202d40 : 0a0a552d 426f6f74 20312e30 2e302028
> ..U-Boot 1.0.0 (
> fa202d50 : 4d617220 20332032 30303420 2d203139
> Mar 3 2004 - 19
> fa202d60 : 3a33353a 3531290a 0a004202 42441c18
> :35:51)...B.BD..
> fa202d70 : bc330868 4b827e4b 2050c005 20231802
> .3.hK.~K P.. #..
> fa202d80 : 5a1bada2 80a24890 0813799f 34fbd6e6
> Z.....H...y.4...
> fa202d90 : 98d252e1 4b81020a 0aa05fec 14007000
> ..R.K....._...p.
> fa202da0 : 3293d1a5 6301171c c220d6a8 228a92d6
> 2...c.... .."...
> fa202db0 : 705113ea 912d3485 9f351618 118dd6a8
> pQ...-4..5......
> fa202dc0 : fa202dd8 85f9d0dc f73effc6 3d538600
> . -......>..=S..
> fa202dd0 : fff23220 000000af fa202e00 fff1278c
> ..2 ..... ....'.
> fa202de0 : 5c73423e d0328f43 fa202e00 000000a6
> \sB>.2.C. ......
> fa202df0 : ffffffff fa202ec0 fff23220 00000005
> ..... ....2 ....
> fa202e00 : fa202e28 fff1266c b650a307 212ca06d
> . .(..&l.P..!,.m
> fa202e10 : fa202e28 de0c4805 fa202d40 fa202ec0
> . .(..H.. - at . ..
> fa202e20 : fff229b4 fff1bae8 fa202e80 fff085e4
> ..)...... ......
> fa202e30 : 39363030 00000202 a8acfac3 4514cac2
> 9600........E...
> BDI>
>
> ==================================================
>
> [root at sgj root]# cu S0 at 9600
> Connected.
>
> [In the whole process,serial console didn't get any
> output]
>
> ================================================
>
> My questions:
>
> 1. Is it possible to use 16C552 as MPC8xx serial
> console UART chip instead of using SMCx? It seemed
> that only 82xx use UART chip as serial console in
> u-boot source as far as I know.
>
> 2. Why did it hang there?How to make it?
>
> Thanks in advance!
>
> Sam
>
> _________________________________________________________
> Do You Yahoo!?
> 完全免费的雅虎电邮，马上注册获赠额外60兆网络存储空间
> http://cn.rd.yahoo.com/mail_cn/tag/?http://cn.mail.yahoo.com
>
>
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
> a free DVD software kit from IBM. Click Now!
> http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users
>
More information about the U-Boot
mailing list