[U-Boot-Users] Fw: Does U-boot support ethernet chip LAN9210 from SMSC?

[Kenneth Johansson]

On Mon, 2008-06-30 at 19:21 +0900, 이승열 wrote:
> Hi Ben,
> 
> The below is the part of smsc911x.c.
> 
> In reg_read(), line 5 shows  "(*(addr_16 + 1) << 16));", which add 1 to addr_16.
> In reg_write(), line 10 shows *(volatile u16*)(addr + 2) = (u16)(val >> 16);, which add 2 to addr.
> 
> I don't understand this. Can you explain to me why address offset differs?
> 

The type of addr and addr_16 is not the same. one is a pointer and one
is a number. 

> 1. #elif CONFIG_DRIVER_SMC911X_16_BIT
> 2. static inline u32 reg_read(u32 addr)
> 3. {
> 4.  volatile u16 *addr_16 = (u16 *)addr;
> 5.  return ((*addr_16 & 0x0000ffff) | (*(addr_16 + 1) << 16));
> 6. }
> 7. static inline void reg_write(u32 addr, u32 val)
> 8.{
> 9. *(volatile u16*)addr = (u16)val;
> 10.  *(volatile u16*)(addr + 2) = (u16)(val >> 16);
> 11. }
> 12. #else
> 
> Best Regards,
> Seung Youl.
> 
> ----- Original Message ----- 
> From: "이승열" <sunnylee at probedigital.com>
> To: "Ben Warren" <biggerbadderben at gmail.com>
> Cc: <u-boot-users at lists.sourceforge.net>
> Sent: Monday, June 30, 2008 3:02 PM
> Subject: Re: [U-Boot-Users] Does U-boot support ethernet chip LAN9210 from SMSC?
> 
> 
> > Hi Ben,
> > 
> > I have found smc911x.c source code in which both 16 and 32 bit access are supported.
> > I will test my board with this source code.
> > 
> > Thank you.
> > 
> > Best Regards,
> > Seung Youl.
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: "Ben Warren" <biggerbadderben at gmail.com>
> > To: "이승열" <sunnylee at probedigital.com>
> > Cc: <u-boot-users at lists.sourceforge.net>
> > Sent: Monday, June 30, 2008 2:43 PM
> > Subject: Re: [U-Boot-Users] Does U-boot support ethernet chip LAN9210 from SMSC?
> > 
> > 
> >> On Sun, Jun 29, 2008 at 10:06 PM, 이승열 <sunnylee at probedigital.com> wrote:
> >>> Hi Ben,
> >>>
> >>> Sorry for bothering you.
> >>>
> >>> I have downloaded the latest version of U-boot.
> >>> There is smc911x.c file. I have added this file to Makefile.
> >>> The compilation is successful.
> >> You don't have to add anything to the Makefile, just use the correct
> >> CONFIG options
> >>>
> >>> But, there are two problems.
> >>> 1. there is no LAN9210 entry in chip id list
> >> So add it.  I haven't looked at the LAN9210 data sheet to even know if
> >> it will work with this chip.  You're going to have to do some work.
> >>> 2. Only 32-bit is supported.
> >>>
> >> Not true.  Both 16 and 32 bit access is supported.  Check the source
> >> code (hint: look for CONFIG_DRIVER_SMC911X_16_BIT)
> >>> Is there any recent driver for LAN9210?
> >> 
> >> I don't know of another or I would have told you about it.
> >> 
> >> Good luck,
> >> Ben
> >>
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