| Message ID | 20170317155523.25809-1-ahaslam@baylibre.com |
|---|---|
| State | Accepted |
| Commit | daa483debea9596f23f5869f7623cec1ef761718 |
| Delegated to: | Tom Rini |
| Headers | show |
Hi Axel, On Friday 17 March 2017 09:25 PM, Axel Haslam wrote: > Add instructions to write an AIS image to NAND > by using the u-boot nand tools. > > Signed-off-by: Axel Haslam <ahaslam@baylibre.com> > --- > Changes in V2: > - add erase command before write > - Add write info when MTD partitions are defined > > board/davinci/da8xxevm/README.da850 | 41 +++++++++++++++++++++++++++++++++++++ > 1 file changed, 41 insertions(+) > > diff --git a/board/davinci/da8xxevm/README.da850 b/board/davinci/da8xxevm/README.da850 > index 29cb4ec..519267e 100644 > --- a/board/davinci/da8xxevm/README.da850 > +++ b/board/davinci/da8xxevm/README.da850 > @@ -47,6 +47,47 @@ U-Boot > sf erase 0 +320000 > U-Boot > tftp u-boot.ais > U-Boot > sf write c0700000 0 $filesize > > +Flashing the images to NAND > +=========================== > +The AIS image can be written to NAND using the u-boot "nand" commands. > + > +Example: > + > +OMAPL138_LCDK requires the AIS image to be written to the second block of > +the NAND flash. > + > +From the "nand info" command we see that the second block would start at > +offset 0x20000: > + > + U-Boot > nand info > + sector size 128 KiB (0x20000) > + Page size 2048 b > + > +From the tftp command we see that we need to copy 0x74908 bytes from > +memory address 0xc0700000 (0x75000 if we align a page of 2048): > + > + U-Boot > tftp u-boot.ais > + Load address: 0xc0700000 > + Bytes transferred = 477448 (74908 hex) > + > +The commands to write the image from memory to NAND would be: > + > + U-Boot > nand erase 0x20000 0x75000 > + U-Boot > nand write 0xc0700000 0x20000 0x75000 > + > +Alternatively, MTD partitions may be defined. Using "mtdparts" to > +conveniently have a bootloader partition starting at the second block > +(offset 0x20000): > + > + setenv mtdids nand0=davinci_nand.0 > + setenv mtdparts mtdparts=davinci_nand.0:128k(bootenv),2m(bootloader) > + > +In this case the commands would be simplified to: > + > + U-Boot > tftp u-boot.ais > + U-Boot > nand erase.part bootloader > + U-Boot > nand write 0xc0700000 bootloader Looks good to me now. Perhaps the mtdparts setting above can be part of the default environment itself ? So the additional step of setting them up can be avoided. But that will be a separate patch. Thanks, Sekhar
On Mon, Mar 20, 2017 at 6:36 AM, Sekhar Nori <nsekhar@ti.com> wrote: > Hi Axel, > > On Friday 17 March 2017 09:25 PM, Axel Haslam wrote: >> Add instructions to write an AIS image to NAND >> by using the u-boot nand tools. >> >> Signed-off-by: Axel Haslam <ahaslam@baylibre.com> >> --- >> Changes in V2: >> - add erase command before write >> - Add write info when MTD partitions are defined >> >> board/davinci/da8xxevm/README.da850 | 41 +++++++++++++++++++++++++++++++++++++ >> 1 file changed, 41 insertions(+) >> >> diff --git a/board/davinci/da8xxevm/README.da850 b/board/davinci/da8xxevm/README.da850 >> index 29cb4ec..519267e 100644 >> --- a/board/davinci/da8xxevm/README.da850 >> +++ b/board/davinci/da8xxevm/README.da850 >> @@ -47,6 +47,47 @@ U-Boot > sf erase 0 +320000 >> U-Boot > tftp u-boot.ais >> U-Boot > sf write c0700000 0 $filesize >> >> +Flashing the images to NAND >> +=========================== >> +The AIS image can be written to NAND using the u-boot "nand" commands. >> + >> +Example: >> + >> +OMAPL138_LCDK requires the AIS image to be written to the second block of >> +the NAND flash. >> + >> +From the "nand info" command we see that the second block would start at >> +offset 0x20000: >> + >> + U-Boot > nand info >> + sector size 128 KiB (0x20000) >> + Page size 2048 b >> + >> +From the tftp command we see that we need to copy 0x74908 bytes from >> +memory address 0xc0700000 (0x75000 if we align a page of 2048): >> + >> + U-Boot > tftp u-boot.ais >> + Load address: 0xc0700000 >> + Bytes transferred = 477448 (74908 hex) >> + >> +The commands to write the image from memory to NAND would be: >> + >> + U-Boot > nand erase 0x20000 0x75000 >> + U-Boot > nand write 0xc0700000 0x20000 0x75000 >> + >> +Alternatively, MTD partitions may be defined. Using "mtdparts" to >> +conveniently have a bootloader partition starting at the second block >> +(offset 0x20000): >> + >> + setenv mtdids nand0=davinci_nand.0 >> + setenv mtdparts mtdparts=davinci_nand.0:128k(bootenv),2m(bootloader) >> + >> +In this case the commands would be simplified to: >> + >> + U-Boot > tftp u-boot.ais >> + U-Boot > nand erase.part bootloader >> + U-Boot > nand write 0xc0700000 bootloader > > Looks good to me now. > > Perhaps the mtdparts setting above can be part of the default > environment itself ? So the additional step of setting them up can be > avoided. But that will be a separate patch. Yes, agree. i will send a patch for that. -Regards Axel. > > Thanks, > Sekhar >
On Fri, Mar 17, 2017 at 04:55:23PM +0100, ahaslam@baylibre.com wrote: > Add instructions to write an AIS image to NAND > by using the u-boot nand tools. > > Signed-off-by: Axel Haslam <ahaslam@baylibre.com> Applied to u-boot/master, thanks!
diff --git a/board/davinci/da8xxevm/README.da850 b/board/davinci/da8xxevm/README.da850 index 29cb4ec..519267e 100644 --- a/board/davinci/da8xxevm/README.da850 +++ b/board/davinci/da8xxevm/README.da850 @@ -47,6 +47,47 @@ U-Boot > sf erase 0 +320000 U-Boot > tftp u-boot.ais U-Boot > sf write c0700000 0 $filesize +Flashing the images to NAND +=========================== +The AIS image can be written to NAND using the u-boot "nand" commands. + +Example: + +OMAPL138_LCDK requires the AIS image to be written to the second block of +the NAND flash. + +From the "nand info" command we see that the second block would start at +offset 0x20000: + + U-Boot > nand info + sector size 128 KiB (0x20000) + Page size 2048 b + +From the tftp command we see that we need to copy 0x74908 bytes from +memory address 0xc0700000 (0x75000 if we align a page of 2048): + + U-Boot > tftp u-boot.ais + Load address: 0xc0700000 + Bytes transferred = 477448 (74908 hex) + +The commands to write the image from memory to NAND would be: + + U-Boot > nand erase 0x20000 0x75000 + U-Boot > nand write 0xc0700000 0x20000 0x75000 + +Alternatively, MTD partitions may be defined. Using "mtdparts" to +conveniently have a bootloader partition starting at the second block +(offset 0x20000): + + setenv mtdids nand0=davinci_nand.0 + setenv mtdparts mtdparts=davinci_nand.0:128k(bootenv),2m(bootloader) + +In this case the commands would be simplified to: + + U-Boot > tftp u-boot.ais + U-Boot > nand erase.part bootloader + U-Boot > nand write 0xc0700000 bootloader + Flashing the images to MMC ========================== If the boot pins are set to boot from mmc, the RBL will try to load the
Add instructions to write an AIS image to NAND by using the u-boot nand tools. Signed-off-by: Axel Haslam <ahaslam@baylibre.com> --- Changes in V2: - add erase command before write - Add write info when MTD partitions are defined board/davinci/da8xxevm/README.da850 | 41 +++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+)