linux-kernel - [PATCH 1/3] at91_mci: Enable MMC_CAP_SDIO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <487F120F.2050305@atmel.com>
Date:	Thu, 17 Jul 2008 11:34:07 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Pierre Ossman <drzeus@...eus.cx>
CC:	ARM Linux Mailing List <linux-arm-kernel@...ts.arm.linux.org.uk>,
	Andrew Victor <linux@...im.org.za>,
	Ville Syrjala <syrjala@....fi>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] at91_mci: Enable MMC_CAP_SDIO_IRQ only when it actually
 works

According to the datasheets AT91SAM9261 does not support
SDIO interrupts, and AT91SAM9260/9263 have an erratum
requiring 4bit mode while using slot B for the interrupt
to work.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
---
Original patch from Ville Syrjala.
I removed the rm9200 from the original patch as this chip is not
SDIO capable (error in datasheet).

 drivers/mmc/host/at91_mci.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 59bf71e..f3d725e 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -1000,7 +1000,7 @@ static int __init at91_mci_probe(struct platform_device *pdev)
 	mmc->f_min = 375000;
 	mmc->f_max = 25000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_SDIO_IRQ;
+	mmc->caps = 0;
 
 	mmc->max_blk_size = 4095;
 	mmc->max_blk_count = mmc->max_req_size;
@@ -1018,6 +1018,13 @@ static int __init at91_mci_probe(struct platform_device *pdev)
 				" - using 1 wire\n");
 	}
 
+	/* Add SDIO capability when  available */
+	if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) {
+		/* AT91SAM9260/9263 erratum */
+		if (host->board->wire4 || !host->board->slot_b)
+			mmc->caps |= MMC_CAP_SDIO_IRQ;
+	}
+
 	/*
 	 * Reserve GPIOs ... board init code makes sure these pins are set
 	 * up as GPIOs with the right direction (input, except for vcc)
-- 
1.5.3.7




--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/