I'm trying to port a custom board running a AMCC 460SX processor to a more
recent version of U-Boot. I'm digging around the configuration registers
trying to figure out why my initial printout is showing:
U-Boot 2013.03932a-dirty (Sep 12 2013 - 14:57:13)
CPU: AMCC PowerPC 460SX Rev. A at 231.29
Stephan,
The processor is a 460SX (shares the same data sheet as 460GT).
In my /include/configs/.h file I include "amcc-common.h" which
has what you suggested:
/*
* UART
*/
#define CONFIG_SYS_NS16550
#define CONFIG_SYS_NS16550_SERIAL
#define CONFIG_SYS_NS16550_REG_SIZE 1
#define CONFIG_SYS_NS1
Hello,
I'm working with an AMCC based board and I'm running into an issue when I
set my uart0 baud rate. In the include/configs/amcc-common.h there is the
following code:
#define CONFIG_BAUDRATE 115200
#define CONFIG_SYS_BAUDRATE_TABLE \
{300, 600, 1200, 2400, 4800, 9600, 19200, 38400,
Stefan,
I know it's been awhile, but I do appreciate your previous help. I took some
time off to complete other projects, now I'm back working on finishing this
port. During the boot I'm seeing the value of &i2c->extsts is either 0x40 or
0x60 which equates to lost arbitration or lost arbitration a
Stefan,
Yes, I am working with a 460SX and a board based off of AMCC Eiger
(unsupported as of 2010).
IICx_STS Register settings:
04 = MDBF Full = Master data buffer contains data
40 = IRQA Active = An IIC interrrupt has been sent to the UIC
I'm clearing the IIC register early on in my code:
mtd
Sefan,
Thanks for the suggestion, I2C_BASE_ADDR is the same in both versions. After
doing some more digging, I can see why v2013.01.01 is not passing
i2c_transfer. The following routine yields different results in the 2
versions:
v2013.01.01-
do {
/* Get status */
statu
Thanks for the suggestion Stefan, the addresses are definitely different:
v2013.01.01: I2C_BASE_ADDR = ef600400
v1.7.02: IIC_STS = ef600408
Would you suggest not using the default drivers and configure GPIO or could
this possibly be a bug in the new version?
Thanks,
Greg
--
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After looking deeper I've found a difference in register values when
performing drivers/i2c/ppc4xx_i2c.c->i2c_transfer function.
v1.7.02 code yields:
/* Transfer is in progress
* we have to wait for upto 5 bytes of data
* 1 byte chip address+r/w bit then bc bytes
* of d
Rommel,
That sounds like a great suggestion, could you elaborate on 'mw' or 'mm' a
little bit more? I'm unfamiliar with both of those. Are they a #define
config, Make config...?
Many thanks!
--Greg
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I feel like something "different" is happening when executing the io.h->out_8
function. Could somebody help me understand this op code
v2013.01.01 Code:
extern inline void out_8(volatile unsigned char __iomem *addr, u8 val)
{
__asm__ __volatile__("sync;\n"
"stb%U0%X0 %1,%0;\n
By board is based off of the ppc460sx.
I only have one I2C bus.
2007 version has clock signal at 0x50 (DIMM0 I2C)
2013 version has no clock signal at 0x50
My boardconfig.h file has the same values configured.
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After hooking the DIMM's I2C up to the o-scope, I don't see a clock signal.
The board will boot with a u-boot version from 2007. Have you ever come
across a missing I2C clock?
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Thanks Stefan, great suggestion, I failed to copy those configurations into
my original message.
/*---
* DDR SDRAM
*--*/
#if !defined(CONFIG_NAND_U_BOOT)
#
Hello,
I'm looking for some direction. I'm trying to update my version of u-boot
for a custom board based off of the PPC460SX. I'm struggling to understand
why I cannot get past reading the I2C on the DIMM. I'm receiving this error:
CPU: AMCC PowerPC 460SX Rev. A at 231.291 MHz (PLB=33 OPB=16 E
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