Date: Sat, 26 Jul 2014 04:16:48 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-arm@FreeBSD.org Subject: [Bug 155894] [at91] [patch] Enable at91 booting from SDHC (high capacity) cards Message-ID: <bug-155894-7-VscamMFuq8@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-155894-7@https.bugs.freebsd.org/bugzilla/> References: <bug-155894-7@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=155894 --- Comment #1 from commit-hook@freebsd.org --- A commit references this bug: Author: ian Date: Sat Jul 26 04:16:05 UTC 2014 New revision: 269113 URL: http://svnweb.freebsd.org/changeset/base/269113 Log: Enable at91 systems to boot from high capacity SD cards. This also fixes a few minor violations of the SD protocol, such as running the bus at high speed during the card identification sequence. The sdcard_init() routine now probes for SDHC cards so that later read requests can make needed adjustments between block and byte offsets based on card type. There is a new MCI_readblocks() function that takes block number and block count parameters instead of byte-offset values. Using this routine, boot loader code can load a kernel from any location on an SDHC or standard SD. The old MCI_read() interface remains unchanged so that existing customized boot loader code will still keep working without changes. Using this routine, boot loaders can load a kernel from anywhere in the first 4GB of an SDHC card (or of course any location on a standard SD card). A new sdcard_use4wire() routine allows boot loaders to request 4-bit transfers; it should be called after sdcard_init(). The sdcard_init() routine no longer assumes the hardware is 4-wire capable and by default sets things up for 1-bit transfers. (4-wire mode is unreliable on at91rm9200, works on later SoCs.) PR: 155894 Submitted by: me. years ago. Changes: head/sys/boot/arm/at91/libat91/mci_device.h head/sys/boot/arm/at91/libat91/sd-card.c head/sys/boot/arm/at91/libat91/sd-card.h -- You are receiving this mail because: You are the assignee for the bug.
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