Re: [patch v19 1/4] drivers: jtag: Add JTAG core driver
From: Randy Dunlap <hidden>
Date: 2018-05-10 16:10:02
Also in:
linux-arm-kernel, linux-devicetree, linux-serial, lkml, openbmc
On 05/10/2018 08:44 AM, Oleksandr Shamray wrote:
Initial patch for JTAG driver 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.
quoted hunk ↗ jump to hunk
--- Documentation/ioctl/ioctl-number.txt | 2 + MAINTAINERS | 10 ++ drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/jtag/Kconfig | 16 ++ drivers/jtag/Makefile | 1 + drivers/jtag/jtag.c | 273 ++++++++++++++++++++++++++++++++++ include/linux/jtag.h | 41 +++++ include/uapi/linux/jtag.h | 105 +++++++++++++ 9 files changed, 451 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.hdiff --git a/drivers/jtag/Kconfig b/drivers/jtag/Kconfig new file mode 100644 index 0000000..5e2c75b --- /dev/null +++ b/drivers/jtag/Kconfig@@ -0,0 +1,16 @@ +menuconfig JTAG + tristate "JTAG support" + help + This provides basic core functionality support for jtag class devices
JTAG class devices.
+ Hardware equipped with JTAG microcontroller which can be built
I'm having problems understanding the line above + first 1/2 of the line below. Maybe something like: Hardware that is equipped with a JTAG microcontroller can be supported by using this driver's interfaces.
+ on top of this drivers. Driver exposes the set of IOCTL to the
This driver exposes a set of IOCTLs to
+ user space for:
+ SIR (Scan Instruction Register, IEEE 1149.1 Data Register scan);
^^^^? Instruction?
+ SDR (Scan Data Register, IEEE 1149.1 Instruction Register scan);
^^^^^^^^^^^? Data?
+ 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.
-- ~Randy