linux-kernel - [PATCH v29 5/6] Documentation jtag: Add JTAG core driver ioctl number

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Date:   Mon, 13 Apr 2020 15:29:19 -0700
From:   Ernesto Corona <ernesto.corona@...el.com>
To:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org
Cc:     Ernesto Corona <ernesto.corona@...el.com>,
        Oleksandr Shamray <oleksandrs@...lanox.com>,
        Jonathan Corbet <corbet@....net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Kishon Vijay Abraham I <kishon@...com>,
        "Darrick J . Wong" <darrick.wong@...cle.com>,
        "Bryant G . Ly" <bryantly@...ux.vnet.ibm.com>,
        Eric Sandeen <sandeen@...hat.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Tomohiro Kusumi <kusumi.tomohiro@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        "Theodore Ts'o" <tytso@....edu>,
        Eric Biggers <ebiggers@...gle.com>,
        Steven Filary <steven.a.filary@...el.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Vadim Pasternak <vadimp@...lanox.com>,
        Amithash Prasad <amithash@...com>,
        Patrick Williams <patrickw3@...com>, Rgrs <rgrs@...tonmail.com>
Subject: [PATCH v29 5/6] Documentation jtag: Add JTAG core driver ioctl number

JTAG class driver provide infrastructure to support hardware/software
JTAG platform drivers. It provide user layer API interface for flashing
and debugging external devices which equipped with JTAG interface
using standard transactions.

Driver exposes set of IOCTL to user space for:
- XFER:
  SIR (Scan Instruction Register, IEEE 1149.1 Data Register scan);
  SDR (Scan Data Register, IEEE 1149.1 Instruction Register scan);
- GIOCSTATUS read the current TAPC state of the JTAG controller
- SIOCSTATE Forces the JTAG TAPC to go into a particular state.
- SIOCFREQ/GIOCFREQ for setting and reading JTAG frequency.
- IOCBITBANG for low level control of JTAG signals.

Signed-off-by: Oleksandr Shamray <oleksandrs@...lanox.com>
Signed-off-by: Ernesto Corona <ernesto.corona@...el.com>
Acked-by: Philippe Ombredanne <pombredanne@...b.com>
Cc: Jonathan Corbet <corbet@....net>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Gustavo Pimentel <gustavo.pimentel@...opsys.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: Darrick J. Wong <darrick.wong@...cle.com>
Cc: Bryant G. Ly <bryantly@...ux.vnet.ibm.com>
Cc: Eric Sandeen <sandeen@...hat.com>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Tomohiro Kusumi <kusumi.tomohiro@...il.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: "Theodore Ts'o" <tytso@....edu>
Cc: Eric Biggers <ebiggers@...gle.com>
Cc: Steven Filary <steven.a.filary@...el.com>
Cc: Jiri Pirko <jiri@...lanox.com>
Cc: Vadim Pasternak <vadimp@...lanox.com>
Cc: Amithash Prasad <amithash@...com>
Cc: Patrick Williams <patrickw3@...com>
Cc: Rgrs <rgrs@...tonmail.com>

v28->v29
Move ioctl number to userspace-api/ioctl/ioctl-number.rst
---
 Documentation/userspace-api/ioctl/ioctl-number.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/userspace-api/ioctl/ioctl-number.rst b/Documentation/userspace-api/ioctl/ioctl-number.rst
index f759edafd938..7c005fc9a1c2 100644
--- a/Documentation/userspace-api/ioctl/ioctl-number.rst
+++ b/Documentation/userspace-api/ioctl/ioctl-number.rst
@@ -332,6 +332,8 @@ Code  Seq#    Include File                                           Comments
                                                                      <mailto:vgo@...io.de>
 0xB1  00-1F                                                          PPPoX
                                                                      <mailto:mostrows@...x.uwaterloo.ca>
+0xB2  00-0F  linux/jtag.h                                            JTAG driver
+                                                                     <mailto:oleksandrs@...lanox.com>
 0xB3  00     linux/mmc/ioctl.h
 0xB4  00-0F  linux/gpio.h                                            <mailto:linux-gpio@...r.kernel.org>
 0xB5  00-0F  uapi/linux/rpmsg.h                                      <mailto:linux-remoteproc@...r.kernel.org>
-- 
2.17.1