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Date: Thu, 29 Oct 2009 10:26:52 +0200 From: Shmulik Ladkani <jungoshmulik@...il.com> To: myuboot@...tmail.fm Cc: "Sergei Shtylyov" <sshtylyov@...mvista.com>, "Florian Fainelli" <florian@...nwrt.org>, linux-kernel@...r.kernel.org, "linux-mips" <linux-mips@...ux-mips.org>, shmulik@...go.com Subject: Re: serial port 8250 messed up after coverting from little endian to big endian on kernel 2.6.31 On Wed, 28 Oct 2009 14:36:15 -0500 myuboot@...tmail.fm wrote: > I just tried UPIO_MEM32 without adding a offset of 3. But the result is > bad - after the kernel initializes the serial console, the console print > out messes up. The early printk is fine because the u-boot initialises > the serial port fine. > > Did I miss anything? Thanks again for your help. I guess you did fine with UPIO_MEM32. Keeping the UPIO_MEM32 approach, I suggest also to fiddle Y/N with CONFIG_SWAP_IO_SPACE (might be that you have it set to Y while you don't really need it, or vice versa). This is since 'readl' uses 'ioswabl' for (potential) byte-swapping of the read value. Take a look at asm/io.h and mangle-port.h. Most important, read your hardware documentation to determine correct access to the memory mapped serial registers. -- Shmulik Ladkani Jungo Ltd. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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