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Groups > linux.kernel > #1702159
| From | Neil Armstrong <narmstrong@baylibre.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver |
| Date | 2017-08-02 16:30 +0200 |
| Message-ID | <ua2OR-2xp-7@gated-at.bofh.it> (permalink) |
| References | <ua1J8-1UY-17@gated-at.bofh.it> <ua1J8-1UY-15@gated-at.bofh.it> |
| Organization | Baylibre |
On 08/02/2017 03:18 PM, Oleksandr Shamray wrote:
> 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);
> - RUNTEST (Forces the IEEE 1149.1 bus to a run state for a specified
> number of clocks).
> - SIOCFREQ/GIOCFREQ for setting and reading JTAG frequency.
>
> Driver core provides set of internal APIs for allocation and
> registration:
> - jtag_register;
> - jtag_unregister;
> - jtag_alloc;
> - jtag_free;
>
> Platform driver on registration with jtag-core creates the next
> entry in dev folder:
> /dev/jtagX
>
> Signed-off-by: Oleksandr Shamray <oleksandrs@mellanox.com>
> Signed-off-by: Jiri Pirko <jiri@mellanox.com>
> ---
> Documentation/ioctl/ioctl-number.txt | 2 +
> MAINTAINERS | 8 +
> drivers/Kconfig | 2 +
> drivers/Makefile | 1 +
> drivers/jtag/Kconfig | 18 ++
> drivers/jtag/Makefile | 2 +
> drivers/jtag/jtag.c | 347 ++++++++++++++++++++++++++++++++++
> include/linux/jtag.h | 63 ++++++
> include/uapi/linux/jtag.h | 133 +++++++++++++
> 9 files changed, 576 insertions(+), 0 deletions(-)
> create mode 100644 drivers/jtag/Kconfig
> create mode 100644 drivers/jtag/Makefile
> create mode 100644 drivers/jtag/jtag.c
> create mode 100644 include/linux/jtag.h
> create mode 100644 include/uapi/linux/jtag.h
>
> diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
> index 3e3fdae..1af2508 100644
> --- a/Documentation/ioctl/ioctl-number.txt
> +++ b/Documentation/ioctl/ioctl-number.txt
> @@ -321,6 +321,8 @@ Code Seq#(hex) Include File Comments
> 0xB0 all RATIO devices in development:
> <mailto:vgo@ratio.de>
> 0xB1 00-1F PPPoX <mailto:mostrows@styx.uwaterloo.ca>
> +0xB2 00-0f linux/jtag.h JTAG driver
> + <mailto:oleksandrs@mellanox.com>
> 0xB3 00 linux/mmc/ioctl.h
> 0xB4 00-0F linux/gpio.h <mailto:linux-gpio@vger.kernel.org>
> 0xB5 00-0F uapi/linux/rpmsg.h <mailto:linux-remoteproc@vger.kernel.org>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 205d397..141aeaf 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7292,6 +7292,14 @@ L: linux-serial@vger.kernel.org
> S: Maintained
> F: drivers/tty/serial/jsm/
>
> +JTAG SUBSYSTEM
> +M: Oleksandr Shamray <oleksandrs@mellanox.com>
> +M: Vadim Pasternak <vadimp@mellanox.com>
> +S: Maintained
> +F: include/linux/jtag.h
> +F: include/uapi/linux/jtag.h
> +F: drivers/jtag/
> +
> K10TEMP HARDWARE MONITORING DRIVER
> M: Clemens Ladisch <clemens@ladisch.de>
> L: linux-hwmon@vger.kernel.org
> diff --git a/drivers/Kconfig b/drivers/Kconfig
> index 505c676..2214678 100644
> --- a/drivers/Kconfig
> +++ b/drivers/Kconfig
> @@ -208,4 +208,6 @@ source "drivers/tee/Kconfig"
>
> source "drivers/mux/Kconfig"
>
> +source "drivers/jtag/Kconfig"
> +
> endmenu
> diff --git a/drivers/Makefile b/drivers/Makefile
> index dfdcda0..6a2059b 100644
> --- a/drivers/Makefile
> +++ b/drivers/Makefile
> @@ -182,3 +182,4 @@ obj-$(CONFIG_FPGA) += fpga/
> obj-$(CONFIG_FSI) += fsi/
> obj-$(CONFIG_TEE) += tee/
> obj-$(CONFIG_MULTIPLEXER) += mux/
> +obj-$(CONFIG_JTAG) += jtag/
> diff --git a/drivers/jtag/Kconfig b/drivers/jtag/Kconfig
> new file mode 100644
> index 0000000..a8d0149
> --- /dev/null
> +++ b/drivers/jtag/Kconfig
> @@ -0,0 +1,18 @@
> +menuconfig JTAG
> + tristate "JTAG support"
> + default n
> + ---help---
> + This provides basic core functionality support for jtag class devices
> + Hardware equipped with JTAG microcontroller which can be built
> + on top of this drivers. Driver exposes the set of IOCTL to the
> + user space for:
> + SIR (Scan Instruction Register, IEEE 1149.1 Data Register scan);
> + SDR (Scan Data Register, IEEE 1149.1 Instruction Register scan);
> + RUNTEST (Forces IEEE 1149.1 bus to a run state for specified
> + number of clocks).
> +
> + If you want this support, you should say Y here.
> +
> + To compile this driver as a module, choose M here: the module will
> + be called jtag.
> +
> diff --git a/drivers/jtag/Makefile b/drivers/jtag/Makefile
> new file mode 100644
> index 0000000..e811330
> --- /dev/null
> +++ b/drivers/jtag/Makefile
> @@ -0,0 +1,2 @@
> +obj-$(CONFIG_JTAG) += jtag.o
> +
> diff --git a/drivers/jtag/jtag.c b/drivers/jtag/jtag.c
> new file mode 100644
> index 0000000..a933bc1
> --- /dev/null
> +++ b/drivers/jtag/jtag.c
> @@ -0,0 +1,347 @@
> +/*
> + * Copyright (c) 2017 Mellanox Technologies. All rights reserved.
> + * Copyright (c) 2017 Oleksandr Shamray <oleksandrs@mellanox.com>
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions are met:
> + *
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + * 3. Neither the names of the copyright holders nor the names of its
> + * contributors may be used to endorse or promote products derived from
> + * this software without specific prior written permission.
> + *
> + * Alternatively, this software may be distributed under the terms of the
> + * GNU General Public License ("GPL") version 2 as published by the Free
> + * Software Foundation.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
> + * POSSIBILITY OF SUCH DAMAGE.
> + */
Maybe using SPDX-License-Identifier could save us from hundred of useless lines !
Neil
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[patch v1 0/2] JTAG driver introduction Oleksandr Shamray <oleksandrs@mellanox.com> - 2017-08-02 15:20 +0200
[patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Oleksandr Shamray <oleksandrs@mellanox.com> - 2017-08-02 15:20 +0200
Re: [patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Neil Armstrong <narmstrong@baylibre.com> - 2017-08-02 16:40 +0200
Re: [patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Arnd Bergmann <arnd@arndb.de> - 2017-08-02 17:00 +0200
Re: [patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Arnd Bergmann <arnd@arndb.de> - 2017-08-02 17:00 +0200
Re: [patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Randy Dunlap <rdunlap@infradead.org> - 2017-08-02 17:40 +0200
[PATCH] drivers: jtag: fix resource_size.cocci warnings kbuild test robot <lkp@intel.com> - 2017-08-03 16:40 +0200
RE: [PATCH] drivers: jtag: fix resource_size.cocci warnings Oleksandr Shamray <oleksandrs@mellanox.com> - 2017-08-03 16:50 +0200
Re: [patch v1 2/2] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver kbuild test robot <lkp@intel.com> - 2017-08-03 16:40 +0200
[patch v1 1/2] drivers: jtag: Add JTAG core driver Oleksandr Shamray <oleksandrs@mellanox.com> - 2017-08-02 15:20 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Greg KH <gregkh@linuxfoundation.org> - 2017-08-02 15:50 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Greg KH <gregkh@linuxfoundation.org> - 2017-08-02 15:50 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Andrew Lunn <andrew@lunn.ch> - 2017-08-02 16:20 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Neil Armstrong <narmstrong@baylibre.com> - 2017-08-02 16:30 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Arnd Bergmann <arnd@arndb.de> - 2017-08-02 17:40 +0200
Re: [patch v1 1/2] drivers: jtag: Add JTAG core driver Tobias Klauser <tklauser@distanz.ch> - 2017-08-03 11:30 +0200
Re: [patch v1 0/2] JTAG driver introduction Andrew Lunn <andrew@lunn.ch> - 2017-08-02 16:20 +0200
RE: [patch v1 0/2] JTAG driver introduction Oleksandr Shamray <oleksandrs@mellanox.com> - 2017-08-03 17:30 +0200
Re: [patch v1 0/2] JTAG driver introduction Andrew Lunn <andrew@lunn.ch> - 2017-08-03 19:50 +0200
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