Hi Michael,
Le 11/05/2011 00:13, Michael Walle a écrit :
Hi Albert,
Am Dienstag 10 Mai 2011, 23:47:04 schrieben Sie:
Hi Michael,
Sorry for the delay. Busy period for me I'm afraid.
no problem ;)
Le 09/05/2011 19:49, Michael Walle a écrit :
Am Montag 02 Mai 2011, 10:37:41 schrieb Prafulla Wadaskar:
-----Original Message----- From: Michael Walle [mailto:michael@walle.cc] Sent: Monday, May 02, 2011 3:35 AM To: u-boot@lists.denx.de Cc: Michael Walle; Prafulla Wadaskar Subject: [PATCH] mvsata: issue hard reset on initialization
Before the actual initialization do a hard reset of the SATA port and the connected device.
Copying Albert for his ack
any news on this?
What is the reason for issuing the hard reset? Is it in case the board was rebooted and we want the disk drives to return to a safe state?
Right, if i reboot my linkstation (from linux) the ATA probing times out without the reset.
Also, the user manual states (FS_88F6180_9x_6281_OpenSource.pdf, Ch 7.6.9): Device hard reset (setting the<eAtaRst> field in the EDMA Command Register (Table 342 p. 506) and device initialization are required before any attempt to access the device.
Ok.
Also, why 25?
I took that 25us from the original marvell uboot port (uboot 1.1.4 heavily modified by marvell, the gpl sources provided by buffalo) and from the linux sata_mv driver, both are using 25us.
Can you just add a comment stating that the value was inspired by Marvell use rather than taken from the spec?
Amicalement,