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From: Stefan Kerkmann <s.kerkmann@pengutronix.de>
To: Sascha Hauer <s.hauer@pengutronix.de>,
	 BAREBOX <barebox@lists.infradead.org>
Cc: Stefan Kerkmann <s.kerkmann@pengutronix.de>
Subject: [PATCH 2/9] mci: core: add cbx extraction function
Date: Tue, 28 May 2024 17:39:21 +0200	[thread overview]
Message-ID: <20240528-feature-mmc-cid-as-parameters-v1-2-e5dc0c1d3eaa@pengutronix.de> (raw)
In-Reply-To: <20240528-feature-mmc-cid-as-parameters-v1-0-e5dc0c1d3eaa@pengutronix.de>

The CBX field is only present for eMMC and designates the type:

00 - Device (Removable)
01 - BGA (Discrete embedded)
10 - POP
11 - Reserved

Signed-off-by: Stefan Kerkmann <s.kerkmann@pengutronix.de>
---
 drivers/mci/mci-core.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 07ac7dd512..2a71fdd39a 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -1917,6 +1917,17 @@ static unsigned extract_mid(struct mci *mci)
 		return UNSTUFF_BITS(mci->cid, 120, 8);
 }
 
+/**
+ * Extract the CBX from the CID
+ * @param mci Instance data
+ *
+ * The 'CBX' is encoded in bit 113:112 in the CID and only present in MMC cards
+ */
+static unsigned extract_cbx(struct mci *mci)
+{
+	return UNSTUFF_BITS(mci->cid, 112, 2);
+}
+
 /**
  * Extract the OEM/Application ID from the CID
  * @param mci Instance data

-- 
2.39.2




  parent reply	other threads:[~2024-05-28 15:40 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-28 15:39 [PATCH 0/9] mci: core: add CID as parameters and fix parsing Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 1/9] mci: core: rename mtd to mdt Stefan Kerkmann
2024-05-28 15:39 ` Stefan Kerkmann [this message]
2024-05-28 15:39 ` [PATCH 3/9] mci: core: add product name extraction function Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 4/9] mci: core: add manufacturing date " Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 5/9] mci: core: parse cid into parameters Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 6/9] mci: core: fix extract_prv and write to string buffer Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 7/9] mci: core: add CBX field as parameter and print it Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 8/9] mci: core: fix extract_oid and write to string buffer Stefan Kerkmann
2024-05-28 15:39 ` [PATCH 9/9] mci: core: add missing slice range for extract_psn function Stefan Kerkmann
2024-05-29  6:17 ` [PATCH 0/9] mci: core: add CID as parameters and fix parsing Sascha Hauer
2024-05-29  7:24 ` Ahmad Fatoum

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