From mboxrd@z Thu Jan 1 00:00:00 1970 From: angelo Subject: Re: mcf54415, spi nor and SD drivers Date: Thu, 6 Jul 2017 20:01:14 +0200 Message-ID: <346cb8ad-abd6-22a6-d2eb-29050e71d8a0@gmail.com> References: <30ab985a-70e5-3ca0-3bb1-ace05dd4ebc2@westnet.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wr0-f181.google.com ([209.85.128.181]:33924 "EHLO mail-wr0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751734AbdGFSBT (ORCPT ); Thu, 6 Jul 2017 14:01:19 -0400 Received: by mail-wr0-f181.google.com with SMTP id 77so13248860wrb.1 for ; Thu, 06 Jul 2017 11:01:18 -0700 (PDT) In-Reply-To: <30ab985a-70e5-3ca0-3bb1-ace05dd4ebc2@westnet.com.au> Content-Language: en-US Sender: linux-m68k-owner@vger.kernel.org List-Id: linux-m68k@vger.kernel.org To: Greg Ungerer , Linux/m68k Hi Greg, On 06/07/2017 15:07, Greg Ungerer wrote: > Hi Angelo, > > On 06/07/17 18:36, angelo wrote: >> i designed here a new board with mcf54415. Testing a first mainline kernel. >> I would like to load a cramfs rootfs from SPI NOR (mtd, ftl) but actually >> i don't see the SPI NOR flash detected from dmesg. >> >> Next future step then would be load rootfs from SD. >> >> Seems there is no selectable driver for >> >> - SPI controller >> - SD (MMC) controller >> >> Those should be similar to existing drivers of some other freescale chip, >> or some new implementation is required ? Attaching dmesg. > > Most other ColdFire parts use the QSPI hardware module, and its driver > is at drivers/spi/spi-coldfire-qspi.c. But, looking at the hardware > reference manual for the mcf5441x family it contains a DSPI hardware > module - and it looks quite different. > > That DSPI module looks to be similar to the one in the Freescale iMX > parts, and its driver is at drivers/spi/spi-fsl-dspi.c. I don't know > that anyone has used that on ColdFire with the mcf5441x parts, > but that is where you should start I think. > Many thanks for all these useful infos. Ok, for now, since there are no spi driver ready to be used i can just concatenate fs to the kernel. Then will try to have them working. > I haven't used any SD/MMC drivers on ColdFire so no advice on where > to look for that one. > > If you are feeling adventurous you may want to look at: > > https://www.spinics.net/lists/linux-m68k/msg10057.html > > With a reasonably recent kernel you don't even need to generate a > different user space filesystem and binaries. You can run your flat > format non-MMU binaries on an MMU configured ColdFire system (as long > as you have CONFIG_BINFMT_FLAT=y in your kernel config). I would love > to be able to push this patch to mainline. Sure, as soon as i am up with the rootfs i can check the mmu, so very soon. > > Regards > Greg > > I let you know. Thanks, regards, Angelo > >> Regards, >> Angelo Dureghello >> >> >> U-Boot 2017.05-00709-g9d9f074dfe-dirty (Jul 02 2017 - 19:50:16 +0200) >> >> CPU: Freescale MCF54410 (Mask:9f Version:2) >> CPU CLK 240 MHz BUS CLK 120 MHz FLB CLK 60 MHz >> INP CLK 30 MHz VCO CLK 480 MHz >> SPI: ready >> DRAM: 128 MiB >> SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB >> In: serial >> Out: serial >> Err: serial >> Hit any key to stop autoboot: 0 >> SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB >> device 0 offset 0x100000, size 0x200000 >> SF: 2097152 bytes @ 0x100000 Read: OK >> ## Booting kernel from Legacy Image at 40001000 ... >> Image Name: mainline kernel >> Created: 2017-07-05 23:58:53 UTC >> Image Type: M68K Linux Kernel Image (uncompressed) >> Data Size: 1642496 Bytes = 1.6 MiB >> Load Address: 40001000 >> Entry Point: 40001000 >> Verifying Checksum ... OK >> Loading Kernel Image ... OK >> [ 0.000000] Linux version 4.10.0-rc2stmark2-001-00020-g0f64df301240 (angelo@jerusalem) (gcc version 4.9.0 (crosstools-sysam-2016.04.16) ) #16 Thu Jul 6 01:58:52 CEST 2017 >> [ 0.000000] uClinux with CPU COLDFIRE(m5441x) >> [ 0.000000] COLDFIRE port done by Greg Ungerer, gerg@snapgear.com >> [ 0.000000] Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne >> [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16320 >> [ 0.000000] Kernel command line: console=ttyS0,115200 root=/dev/mtdblock3 mtdparts=spi-flash.0:1m(u-boot),7m(kernel),-(rootfs) rw rootwait >> [ 0.000000] PID hash table entries: 512 (order: -2, 2048 bytes) >> [ 0.000000] Dentry cache hash table entries: 16384 (order: 3, 65536 bytes) >> [ 0.000000] Inode-cache hash table entries: 8192 (order: 2, 32768 bytes) >> [ 0.000000] Memory: 128664K/131072K available (1154K kernel code, 92K rwdata, 304K rodata, 48K init, 121K bss, 2408K reserved, 0K cma-reserved) >> [ 0.000000] Virtual kernel memory layout: >> [ 0.000000] vector : 0x40000000 - 0x40000400 ( 1 KiB) >> [ 0.000000] kmap : 0x00000000 - 0xffffffff (4095 MiB) >> [ 0.000000] vmalloc : 0x00000000 - 0xfffff ----- Message truncated ----- >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-m68k" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >