linux-kernel - [patch 5/5] [RFC] Add MMC Password Protection (lock/unlock) support V7: mmc_omap

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Message-ID: <4564648B.2020005@indt.org.br>
Date:	Wed, 22 Nov 2006 10:54:03 -0400
From:	Anderson Briglia <anderson.briglia@...t.org.br>
To:	"Linux-omap-open-source@...ux.omap.com" 
	<linux-omap-open-source@...ux.omap.com>
CC:	Russell King <rmk+lkml@....linux.org.uk>,
	Pierre Ossman <drzeus-list@...eus.cx>,
	Tony Lindgren <tony@...mide.com>,
	"Aguiar Carlos (EXT-INdT/Manaus)" <carlos.aguiar@...t.org.br>,
	ext David Brownell <david-b@...bell.net>,
	"Lizardo Anderson (EXT-INdT/Manaus)" <anderson.lizardo@...t.org.br>,
	linux-kernel@...r.kernel.org
Subject: [patch 5/5] [RFC] Add MMC Password Protection (lock/unlock) support
 V7: mmc_omap_dma.diff

OMAP platform specific patch.
- Adjust the frame size for DMA transfers.

Signed-off-by: Anderson Briglia <anderson.briglia <at> indt.org.br>
Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar <at> indt.org.br>

Index: linux-omap-2.6.git/drivers/mmc/omap.c
===================================================================
--- linux-omap-2.6.git.orig/drivers/mmc/omap.c	2006-11-22 09:07:25.000000000 -0400
+++ linux-omap-2.6.git/drivers/mmc/omap.c	2006-11-22 09:19:03.000000000 -0400
@@ -629,6 +629,14 @@ mmc_omap_prepare_dma(struct mmc_omap_hos

  	data_addr = host->phys_base + OMAP_MMC_REG_DATA;
  	frame = data->blksz;
+
+#ifdef CONFIG_MMC_PASSWORDS
+	/* MMC LOCK/UNLOCK: Do frame size multiple of two. This is
+	 * needed for DMA transfers to work properly, once
+	 * the block size depends on MMC password length.
+	 */
+	frame += frame&0x1;
+#endif
  	count = sg_dma_len(sg);

  	if ((data->blocks == 1) && (count > (data->blksz)))

-
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