Commit Graph

4204 Commits

Author SHA1 Message Date
Andreas Fritiofson 0b64be2019 rlink: simplify and optimize queue fill level checks
Add a helper function for running the queue if it would overflow otherwise.
Use it to simplify the queue fill level checks and optimize in a few cases
that would previously run the queue prematurely.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:09 +02:00
Andreas Fritiofson d23d61a932 rlink: remove redundant text from log messages
__FILE__ and __LINE__ are already printed using the log macros.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:09 +02:00
Andreas Fritiofson 5f698273c2 rlink: remove duplicated code
After the reply_index handling is fixed, there's no need to special case
the out scan.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:09 +02:00
Andreas Fritiofson 5812ef2b73 rlink: fix reply counter to enable sending full buffers
dtc_queue.reply_index was wrongly being increased during out scans, causing
the queue to be sent before the out buffer was full. This patch increases
raw upload speed by 50% or so.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:09 +02:00
Andreas Fritiofson 6f1641a5cc rlink: more indentation fixes
Remove unnecessary block scopes to reduce indentation level.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:08 +02:00
Andreas Fritiofson 068c9f266e rlink: fix indentation errors
Indentation was inconsistent and some lines not indented at all. Quickfix
using Eclipse's auto-indentation.

Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
2011-08-10 06:52:08 +02:00
Drasko DRASKOVIC 827057f560 mips32 : Fixed memory byte access
Function mips_m4k_write_memory() does endianess byte swap,
but this procedure break one byte access (temporary array
overwrites content in buffer).
As a fix, this endianess swap and buffer affecting
is preformed only on hword and word accesses (not on byte access).
2011-08-09 23:17:28 +02:00
Drasko DRASKOVIC c18e02387b mips32: Sync Caches to Make Instr Writes Effective
Pprogram that loads another program into memory is actually writing the
D- side cache.
The instructions it has loaded can't be executed until they reach the
I-cache.

After the instructions have been written, the loader should arrange to
write back any containing D-cache line and invalidate any locations
already in the I-cache.

For the MIPS Architecture Release2 cores, we can use synci command
that does this job.
For Release1 we must use "cache" instruction.
2011-08-09 23:17:28 +02:00
Drasko DRASKOVIC 1be7163408 mips32: Added CP0 coprocessor R/W routines
This patch adds MIPS32 CP0 coprocessor R/W routines,
as well as adequate commands to use these routines via
telnet interface.

Now is becomes possible to affect CP0 internal registers
and configure CPU directly from OpenOCD.
2011-08-09 23:17:28 +02:00
Drasko DRASKOVIC 800bc9308d mips_m4k: common_magic should be unsigned
For all architectures we use distinct common magic number,
and this should be a uint32_t type.
Otherwise, comparison with macros will yield compilation
warning.
2011-08-09 23:17:28 +02:00
Drasko DRASKOVIC e1466df54d mips32: Removed Unnecessary JTAG Queue Flush
jtag_execute_queue() is executed as a part of mips_ejtag_drscan_32().
No need for this to be done before - removed for optimisation.
2011-08-09 23:17:28 +02:00
Rodrigo L. Rosa 194e3c5bc5 fix tapenabler return code
if tap enable/disable failed then a warning was written to the log, but JIM_OK was returned. if using openocd via a TCP interface to the TCL port, there is no way to catch that the command failed (it didn't enable the tap, so it failed)
now it return an error if it fails.
2011-08-09 20:59:40 +02:00
Rodrigo L. Rosa d1a16ce9d6 fix return error msj
retval was not correctly propagated
2011-08-09 20:55:26 +02:00
Andreas Bießmann 6e5c37be29 flash/nor/cfi: fix TopBottom for atmel chips
There are some older atmel nor chips which have negated logic for
TopBottom detection. This patch adds a special handling for the old
chips. This is the same mechanism as implemented in linux kernel.

Signed-off-by: Andreas Bießmann <andreas.devel@gmail.com>
2011-08-09 20:19:37 +02:00
Øyvind Harboe 7d2bf8805d Revert "dsp5680xx: disable for now, it generates warnings"
This reverts commit d567df02b9.
2011-08-09 20:15:21 +02:00
Rodrigo L. Rosa c2c19c5018 dsp5680xx fix constante ref
a counter was incorrectly set
when i added the macros i incorrectly called them.
fixed that.
2011-08-09 20:07:49 +02:00
Rodrigo L. Rosa e8543de820 dsp5680xx fix FM clk
before doing anything with the flash module (FM) the clock divider must be set.
if erase_check was the first thing done with the FM after reset then an error would be generated because the clk divider was not set.
now erase_check sets the clk divider.
2011-08-09 20:07:46 +02:00
Rodrigo L. Rosa ba68ae8bd5 dps5680xx fix warnings
reorganized code to get rid of compiler warnings
the warning were related to allignment, i do not get these warning on my build system (i've tried setting the compiler flag but it doesn't work, still working on why) so i cannot detect them (yet.)
2011-08-09 20:07:28 +02:00
Øyvind Harboe bbd84417f6 arm11: disable broken optimization for setting current scan chain 2011-08-08 22:33:41 +02:00
Jie Zhang d02dfff48b etb: fix incorrect previous patchset
This corrects two issues found with openocd.
d7f71e7fe9 removed some code that was
being used.

The above then caused even more code to get removed by commit 1cfb2287a6.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-08-01 17:16:10 +01:00
Spencer Oliver 852289bc49 flash: add support for deprecated stm32 flash cmds
Issue warning when the old cmd is used and redirect to new supported one.
These deprecated cmds will be removed at some point.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-28 12:47:49 +01:00
Spencer Oliver b066a7db24 flash: update stm32 driver names
Use consistent names for the stm32 family flash drivers, eg.
stm32x -> stm32f1x
stm32f2xxx -> stm32f2x

this makes it easier to add support for newer stm32 families.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-28 11:42:27 +01:00
Ronny Strutz e872d2880e add Fujitsu FM3 Family flash support
Signed-off-by: Ronny Strutz <ronny@ewoks.de>
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-26 21:15:34 +01:00
Luca Bruno f44bde23b9 Do not append git info to version string when building from released tarball
When building official releases from tarball, git commit info is not
available in the building environment. Thus, automake should not try to
append the git commit to the version string.

Signed-off-by: Luca Bruno <lucab@debian.org>
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-14 10:19:18 +01:00
Spencer Oliver 0ea76bc778 ftd2xx: handle FT_GetLatencyTimer bug in v1.04
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-12 15:51:18 +01:00
Spencer Oliver b765688be6 busblaster: Fix warnings when building against D2XX
The default is -Werror, so warnings become errors.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-12 14:40:19 +01:00
Steve Bennett b238735f89 ft2232: Fix warnings when building against D2XX
The default is -Werror, so warnings become errors

Signed-off-by: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-12 12:58:28 +01:00
Luca Bruno 898dd3af46 Fix typo in command output
Fix a bunch of minor typo in user facing output.

Signed-off-by: Luca Bruno <lucab@debian.org>
2011-07-10 17:00:57 +02:00
Drasko DRASKOVIC ac43d7a69f mips_m4k and arm7_9 : Fix soft bkpt endianess for 16-bit instructions
The patch fix comparison of target data on the host by using
target_buffer_get_u16() to transform current_instr to
_host_ endianess before comparison.
2011-07-04 18:15:18 +02:00
Peter Horn d4cd6f0320 cortex_m3: add auto maskisr
This patch extends the cortex_m3 maskisr command by a new option 'auto'.
The 'auto' option handles interrupts during stepping in a way they are
processed but don't disturb the program flow during debugging.

Before one had to choose to either enable or disable interrupts. The former
steps into interrupt handlers when they trigger. This disturbs the flow during
debugging, making it hard to follow some piece of code when interrupts occur
often.

When interrupts are disabled, the flow isn't disturbed but code relying on
interrupt handlers to be processed will stop working. For example a delay
function counting the number of timer interrupts will never complete, RTOS
task switching will not occur and output I/O queues of interrupt driven
I/O will stall or overflow.

Using the 'maskisr' command also typically requires gdb hooks to be supplied
by the user to switch interrupts off during the step and to enable them again
afterward.

The new 'auto' option of the 'maskisr' command solves the above problems. When
set, the step command allows pending interrupt handlers to be executed before
the step, then the step is taken with interrupts disabled and finally interrupts
are enabled again. This way interrupt processing stays in the background without
disturbing the flow of debugging. No gdb hooks are required. The 'auto'
option is the default, since it's believed that handling interrupts in this
way is suitable for most users.

The principle used for interrupt handling could probably be used for other
targets too.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-07-04 11:31:52 +01:00
Spencer Oliver 89fa8ce2d8 Revert "cortex_m3: add auto maskisr"
This reverts commit ff640f197a.

Original patch reverted as Author's name was incorrectly set.
2011-07-04 11:31:52 +01:00
Drasko DRASKOVIC bad3ee87ac mips_m4k : Fix soft breakpoint endianess handling
In order to compare data read from the target with some marcros or data
defined on the host, we must transform this read data from target
endianess to host endianess.
target_read_memory() gets bytes from target to the host, but keeps them in _target_
endianess. This is OK if we just want to temporary keep this data on the
host, like keeping breakpoint->orig_instr. But if we want to use this
data for any ispections and comparisons on the host side, we must
transform it to _host_ endianess, by using target_buffer_get_u32()
function.
Currently this transformation is missing, and check current_instr ==
MIPS32_SDBBP will never pass if target and host endianess differ,
because current_instr will be kept in _target_ endianess and
MIPS32_SDBBP will be kept in _host_ endianess,

The patch fix this issue by using target_buffer_get_u32() to transform current_instr to
_host_ endianess before comparison.
2011-07-01 21:31:08 +02:00
Øyvind Harboe d567df02b9 dsp5680xx: disable for now, it generates warnings
Use "git revert <commit>" to revert this commit, then build and
repair and post patch to the mailing list.

Warnings generated with:

nios2-elf-gcc (GCC) 3.4.6 (Altera Nios II 9.1 b222)

openocd/src/target/dsp5680xx.c: In function 'eonce_rx_upper_data':
openocd/src/target/dsp5680xx.c:252: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c: In function 'eonce_rx_lower_data':
openocd/src/target/dsp5680xx.c:268: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c: In function 'eonce_pc_store':
openocd/src/target/dsp5680xx.c:508: warning: dereferencing type-punned
pointer will break strict-aliasing rules
openocd/src/target/dsp5680xx.c: In function 'dsp5680xx_read':
openocd/src/target/dsp5680xx.c:736: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c:737: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c: In function 'dsp5680xx_write_8':
openocd/src/target/dsp5680xx.c:823: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c: In function 'dsp5680xx_write':
openocd/src/target/dsp5680xx.c:938: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c:941: warning: cast increases required
alignment of target type
openocd/src/target/dsp5680xx.c: In function 'dsp5680xx_f_wr':
openocd/src/target/dsp5680xx.c:1355: warning: cast increases required
alignment of target type
2011-06-28 18:39:01 +02:00
Øyvind Harboe 2482244b07 mips4k: fix big-endian hosts and host alignment problems
the code was making assumptions about the endianness of the host.
2011-06-28 18:22:32 +02:00
Øyvind Harboe e4c054cada dsp5680xx: fix compilation problems
use a more specific global variable name than "context", which
can easily conflict with other things.
2011-06-28 18:09:48 +02:00
Spencer Oliver ff640f197a cortex_m3: add auto maskisr
This patch extends the cortex_m3 maskisr command by a new option 'auto'.
The 'auto' option handles interrupts during stepping in a way they are
processed but don't disturb the program flow during debugging.

Before one had to choose to either enable or disable interrupts. The former
steps into interrupt handlers when they trigger. This disturbs the flow during
debugging, making it hard to follow some piece of code when interrupts occur
often.

When interrupts are disabled, the flow isn't disturbed but code relying on
interrupt handlers to be processed will stop working. For example a delay
function counting the number of timer interrupts will never complete, RTOS
task switching will not occur and output I/O queues of interrupt driven
I/O will stall or overflow.

Using the 'maskisr' command also typically requires gdb hooks to be supplied
by the user to switch interrupts off during the step and to enable them again
afterward.

The new 'auto' option of the 'maskisr' command solves the above problems. When
set, the step command allows pending interrupt handlers to be executed before
the step, then the step is taken with interrupts disabled and finally interrupts
are enabled again. This way interrupt processing stays in the background without
disturbing the flow of debugging. No gdb hooks are required. The 'auto'
option is the default, since it's believed that handling interrupts in this
way is suitable for most users.

The principle used for interrupt handling could probably be used for other
targets too.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-06-28 14:16:48 +01:00
Peter Horn e53f7e5fc0 cortex_m3: add BKPT_TYPE_BY_ADDR define
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-06-28 14:12:00 +01:00
Martin Schmölzer 5141ab3e69 Include ULINK driver in src/jtag/drivers/Makefile.am
A new variable "nobase_dist_pkglib_DATA" is introduced to install
the OpenULINK firmware image to $PREFIX/lib/openocd/OpenULINK/ulink_firmware.hex

Also, the variable "EXTRA_DIST" is used to include the OpenULINK firmware source
in the OpenOCD source distribution.
2011-06-26 17:43:51 +02:00
Martin Schmölzer 29f6f6ae5f Include ULINK driver in src/Makefile.am 2011-06-26 17:43:51 +02:00
Martin Schmölzer f279e54347 Include ULINK driver in src/jtag/interfaces.c 2011-06-26 17:43:51 +02:00
Martin Schmölzer 3c3f3c4247 Add OpenULINK firmware
Build requires SDCC, the Small Device C Compiler.
2011-06-26 17:43:51 +02:00
Martin Schmölzer 03e4ae8481 Add source code for new ULINK driver 2011-06-26 17:43:50 +02:00
Drasko DRASKOVIC 37aaa28292 Fix load_image for ELF with all p_paddr set to zero
So far image_load command tries to load ELF binaries to address
discovered by reading p_paddr member of a Program header of an ELF
segment.

However, ELF specifications says for p_paddr : ...Because System V
ignores physical addressing for application programs, this member has
unspecified contents for executable files and shared objects.

ARM ELF specifiaction goes even further, demanding that this member
be set to zero, using the p_vaddr as a segment load address.

To avoid the cases to wrong addr where p_paddr is zero,
we are now using p_vaddr to as a load destination in case that *all*
p_paddr == 0. Basically, this patch re-implements the approach present in
BDF's elf.c, which is used by GDB also (so that we can be consistent).
2011-06-24 11:00:35 +02:00
Spencer Oliver e7c611deea build: do not included generated files in distribution
We have to use this method as automake seems to ignore nodist_ on libs.

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-06-17 12:22:37 +01:00
Spencer Oliver 16cbe1216a build: add missing files to make dist
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-06-17 12:21:01 +01:00
Spencer Oliver 3428035a7e build: add missing files from dist release
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-06-17 09:31:13 +01:00
Tomek CEDRO 37d5ac6378 ADAPTER: Fixed transport selection mechanism to support transports other than jtag (if defined). 2011-06-16 19:49:54 +02:00
Tomek CEDRO 9f40d41f68 OPENOCD: Renamed ambiguous main2() into openocd_thread() to show possible solution for thread support in future. 2011-06-16 17:27:12 +02:00
Øyvind Harboe c8b5719802 transport: move files over to transport folder
as we introduce swd and jtag as two transports, we want
to start up with a new transport folder to organize the
code a bit.
2011-06-13 15:51:04 +02:00
Rodrigo L. Rosa 47aa65b3e8 doxy more 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa d343941386 doxy & cleanup 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa cbe201fe6b fix protection behavior 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa 7b0ead520d cleanup trailing whitespaces 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa f4b9a2fc8b flash speed improved 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa ca76e4a423 removed unnecessary actions/controls 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa c4bcb0b95a cleanup flash module command 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa d539fc856f fix read for verify_image 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa f42353d821 fix read speed improved by queueing commands 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa f4a3db0d4a fix flash driver size, sector erase 2011-06-12 11:18:27 +02:00
Rodrigo L. Rosa 56d3927abf Added minimodule (ftdi) interface 2011-06-12 11:18:27 +02:00
Øyvind Harboe 33f9bec9ec Silence -O3 warning 2011-06-07 17:58:41 +02:00
Freddie Chopin 1cfb2287a6 Fix "unused variable" warnings (errors) detected with GCC 4.7.0 - leftover changes 2011-06-07 17:53:33 +02:00
Stefan Mahr 5d9b7cdd2b mips: add nor flash write from memory block 2011-06-05 22:45:21 +02:00
Rodrigo L. Rosa c989de0cea crc check on flashed data 2011-06-04 09:52:14 +02:00
Rodrigo L. Rosa d09bef2622 code cleanup 2011-06-04 09:52:14 +02:00
Freddie Chopin f499bab698 Fix "unused variable" warnings (errors) detected with GCC 4.7.0 - dubious fixes 2011-06-04 09:46:48 +02:00
Freddie Chopin f6315d5e5b Fix "unused variable" warnings (errors) detected with GCC 4.7.0 - trivial fixes 2011-06-04 09:35:13 +02:00
Stefan Mahr 796086cd49 mips: fixup fastdata
fixup fastdata
2011-06-01 07:23:42 +02:00
Stefan Mahr 524d79ebe7 mips: fix some more endian madness 2011-06-01 07:23:35 +02:00
Stefan Mahr 875298bc53 mips: fix swapping if running on big endian host 2011-05-29 23:21:23 +02:00
Damjan Marion 9b4628ddab Fixed values for Samung NAND chips 2011-05-28 19:44:17 +02:00
Damjan Marion db91a36fdd Improve NAND flash detection
Detect based on both manufacturer id and chip id
if manufacturer id is defined in table
2011-05-28 14:30:58 +02:00
Damjan Marion acdf14eb43 Reorganize NAND flash table
- added manufacturer field
- name moved to the end for better text alignment
2011-05-28 14:27:48 +02:00
Stefan Mahr 73988aea1f mips: fix swapping if openocd is running on big endian host 2011-05-28 14:25:06 +02:00
Alan Bowman 212db44fcf Report actual current thread 2011-05-25 22:05:26 +02:00
Alan Bowman a57daf23db Add eCos/Cortex RTOS support 2011-05-25 22:05:23 +02:00
Stefan Mahr 6d6837f988 add support for spansion flash on mindspeed c300 eval board
Signed-off-by: Stefan Mahr <stefan.mahr@sphairon.com>
2011-05-25 22:02:40 +02:00
Spencer Oliver 5d7d08a1f0 dsp5680xx: whitespace cleanup
Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-05-23 10:23:34 +01:00
Spencer Oliver d16b0ea6d4 Fix build issue under cygwin
cygwin does not define sleep, so use our internal win32 version.
caused by commit 9d4aec6bda

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
2011-05-23 10:22:12 +01:00
Rodrigo L. Rosa ef599aebfd flashing speed improved using queued jtag. error propagation improved. 2011-05-19 07:27:02 +02:00
Jie Zhang ee124401a2 Get register value if it's invalid in cache. 2011-05-18 18:52:20 +02:00
Alan Bowman 6d9f61fb65 Corrected test for invalid current_threadid 2011-05-18 18:51:10 +02:00
Rodrigo L. Rosa 129f099ef1 flash support (only full erase/write) for 568013 and 568037 2011-05-18 18:47:55 +02:00
Rodrigo L. Rosa 9d4aec6bda partial support for 568013 and 568037, target integration. 2011-05-18 18:47:50 +02:00
Alan Bowman 6349a47ebc Correct stacking direction and use of address offset 2011-05-14 16:59:29 +02:00
Jie Zhang 7d8053e93f Remove useless MIPS code in avr32_ap7k.c. 2011-05-03 21:59:08 +02:00
Jonas Hörberg e3f3f60a02 adapter speed: require init script setting and centralize activation from drivers to core.c
Signed-off-by: Jonas Hörberg <jhorberg@sauer-danfoss.com>
2011-05-01 00:38:04 +02:00
Øyvind Harboe 5c739b148e ecos: add 64 bit types for sprintf/sscanf 2011-04-28 22:17:48 +02:00
Michel Jaouen 1e7e594452 gdb_server : 'R' command replied by OK 2011-04-28 12:22:39 +02:00
Michel Jaouen 5578935eff cortex_a : smp support
Conflicts:

	src/target/cortex_a.c
2011-04-28 12:22:29 +02:00
Michel Jaouen b778b36f29 smp : infra for smp minimum support 2011-04-28 12:22:10 +02:00
Øyvind Harboe 36d60ee6c8 cfi: leave check on whether target is running to target_write_memory()
there was a check in clearing the status register that
called exit() if the target was running. target_write_memory()
has such a check and will report the error correctly.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
2011-04-27 23:02:28 +02:00
SimonQian 5bd1f0bad4 add STM32F2 revY 2011-04-26 12:05:07 +02:00
SimonQian 2e88162b00 remove read of flash_size in STM32F2 2011-04-26 12:04:57 +02:00
Damjan Marion 5d987bca9c buspirate: fix building on some OSes 2011-04-26 11:55:54 +02:00
Michel Jaouen 3c6af518b3 rtos : compilation error on amd64 2011-04-19 12:53:56 +02:00
Alexandre Pereira da Silva 32ede8fa21 Fix non cfi x16 nor flash connected to x8 bus. The ids in the table should be masked before comparison. 2011-04-19 12:53:05 +02:00
Alexandre Pereira da Silva e105915a4a Make the LPC32xx nand driver support up to 5 address cycles. This will only work in the SLC driver. 2011-04-19 12:51:49 +02:00
Alexandre Pereira da Silva 2ed19d3b9b Make the LPC32xx slc nand driver the default 2011-04-19 12:51:36 +02:00
Øyvind Harboe e984dc1f16 jtag: clarify jtag->init() and jtag->quit() definitions
only set jtag global pointer if jtag->init() succeeds. Less code,
more clear what the rules are.

Fix nit that error value from init() was not propagated unmodified.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
2011-04-19 12:43:16 +02:00