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2020-12-10slimbus: qcom: fix potential NULL dereference in qcom_slim_prg_slew()Zhang Changzhong1-7/+2
platform_get_resource_byname() may fail and in this case a NULL dereference will occur. Fix it to use devm_platform_ioremap_resource_byname() instead of calling platform_get_resource_byname() and devm_ioremap(). This is detected by Coccinelle semantic patch. @@ expression pdev, res, n, t, e, e1, e2; @@ res = \(platform_get_resource\|platform_get_resource_byname\)(pdev, t, n); + if (!res) + return -EINVAL; ... when != res == NULL e = devm_ioremap(e1, res->start, e2); Fixes: ad7fcbc308b0 ("slimbus: qcom: Add Qualcomm Slimbus controller driver") Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com> Link: https://lore.kernel.org/r/1607392473-20610-1-git-send-email-zhangchangzhong@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-09slimbus: qcom-ngd-ctrl: fix SSR dependenciesSrinivas Kandagatla1-2/+1
NGD should depend on QCOM_RPROC_COMMON instead of selecting it, as this will be selected by respective remoteproc driver. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201201093843.20126-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: remove redundant out of memory messagesSrinivas Kandagatla1-2/+0
Failure of dma_alloc_coherent will already throw a error message, so addition message is really redundant here. Remove it! Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-8-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMIBjorn Andersson1-0/+6
Attempting to send a power request during PM operations, when the QMI handle isn't initialized results in a NULL pointer dereference. So check if the QMI handle has been initialized before attempting to post the power requests. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-7-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: Constify static structsRikard Falkeborn1-2/+2
qcom_slim_qmi_msg_handlers[] and qcom_slim_ngd_qmi_svc_event_ops are only used as input arguments to qmi_handle_init() which accepts const pointers to both qmi_ops and qmi_msg_handler. Make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-6-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: messaging: Fix fall-through warnings for ClangGustavo A. R. Silva1-0/+1
In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning by explicitly adding a break statement instead of letting the code fall through to the next case. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: add Protection Domain Restart SupportSrinivas Kandagatla2-0/+25
Add support to protection domain restart. Protection domain restart would also restart the service just like SSR. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: qcom-ngd-ctrl: add Sub System Restart supportSrinivas Kandagatla2-5/+95
This patch adds SSR(SubSystem Restart) support which includes, synchronisation between SSR and QMI server notifications. Also with this patch now NGD is taken down by SSR instead of QMI server down notification. NGD up path now relies on both SSR and QMI notifications and particularly sequence of SSR up followed by QMI server up notification. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-27slimbus: fix a kernel-doc markupMauro Carvalho Chehab1-1/+1
Fix the name of the enum on its kernel-doc markup: enum slim_ch_aux_fmt -> enum slim_ch_aux_bit_fmt Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20201127102451.17114-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-25slimbus: qcom-ngd-ctrl: disable ngd in qmi server down callbackSrinivas Kandagatla1-0/+4
In QMI new server notification we enable the NGD however during delete server notification we do not disable the NGD. This can lead to multiple instances of NGD being enabled, so make sure that we disable NGD in delete server callback to fix this issue! Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200925095520.27316-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-25slimbus: core: do not enter to clock pause mode in coreSrinivas Kandagatla1-2/+0
Let the controller logic decide when to enter into clock pause mode! Entering in to pause mode during unregistration does not really make sense as the controller is totally going down at that point in time. Fixes: 4b14e62ad3c9e ("slimbus: Add support for 'clock-pause' feature") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200925095520.27316-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-25slimbus: core: check get_addr before removing laddr idaSrinivas Kandagatla1-2/+2
logical address can be either assigned by the SLIMBus controller or the core. Core uses IDA in cases where get_addr callback is not provided by the controller. Core already has this check while allocating IDR, however during absence reporting this is not checked. This patch fixes this issue. Fixes: 46a2bb5a7f7e ("slimbus: core: Add slim controllers support") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200925095520.27316-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-15slimbus: core: Fix mismatch in of_node_get/putSaravana Kannan1-0/+1
Adding missing corresponding of_node_put Fixes: 7588a511bdb4 ("slimbus: core: add support to device tree helper") Signed-off-by: Saravana Kannan <saravanak@google.com> [Srini: added fixes tag, removed NULL check and updated log] Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200511151334.362-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-15slimbus: core: Set fwnode for a device when setting of_nodeSaravana Kannan1-3/+2
When setting the of_node for a newly created device, also set the fwnode. This allows fw_devlink feature to work for slimbus devices. Also, remove some unnecessary NULL checks. The functions in question already do NULL checks. Signed-off-by: Saravana Kannan <saravanak@google.com> [Srini: removed unnecessary NULL check from other patch] Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200511151334.362-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28slimbus: ngd: remove redundant assignmentSrinivas Kandagatla1-1/+0
remove redundant assignment, as this is already done fewlines lines before. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200417093914.22052-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28slimbus: ngd: get drvdata from correct deviceSrinivas Kandagatla1-2/+2
Get drvdata directly from parent instead of ngd dev, as ngd dev can probe defer and previously set drvdata will become null. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200417093618.7929-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-12slimbus: ngd: add v2.1.0 compatibleSrinivas Kandagatla1-0/+3
This patch adds compatible for SlimBus Controller on SDM845. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200312152510.12224-1-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14slimbus: qcom: add missed clk_disable_unprepare in removeChuhong Yuan1-0/+2
The remove misses to disable and unprepare rclk and hclk. Add calls to clk_disable_unprepare to fix it. Signed-off-by: Chuhong Yuan <hslester96@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200109103148.5612-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14slimbus: Use the correct style for SPDX License IdentifierNishad Kamdar1-1/+1
This patch corrects the SPDX License Identifier style in header file related to SLIMbus driver. For C header files Documentation/process/license-rules.rst mandates C-like comments (opposed to C source files where C++ style should be used). Changes made by using a script provided by Joe Perches here: https://lkml.org/lkml/2019/2/7/46. Suggested-by: Joe Perches <joe@perches.com> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200109103148.5612-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-14slimbus: qcom-ngd-ctrl: Use dma_request_chan() instead dma_request_slave_channel()Peter Ujfalusi1-8/+12
dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20200109103148.5612-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-18slimbus: fix slim_tid_txn()Srinivas Kandagatla1-1/+1
fix below issue reported by coccicheck ./drivers/slimbus/slimbus.h:440:3-46: duplicated argument to && or || Looks like this was a typo, SLIM_MSG_MC_REQUEST_CHANGE_VALUE is command which requires transaction ID, so fix it, this also fix the warning. Reported-by: Hariprasad Kelam <hariprasad.kelam@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20190818093902.29993-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-18slimbus: qcom-ngd-ctrl: Add of_node_put() before returnNishka Dasgupta1-1/+4
Each iteration of for_each_available_child_of_node puts the previous node, but in the case of a return from the middle of the loop, there is no put, thus causing a memory leak. Hence add an of_node_put before the return in two places. Issue found with Coccinelle. Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20190818093902.29993-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-20slimbus: core: generate uevent for non-dt onlySrinivas Kandagatla1-5/+0
Rely on MODULE_ALIAS() for automatic kernel module loading, rather than basing it on the OF compatible. This ensures that drivers without of_device_id table, such as wcd9335, will be automatically loaded. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> [bjorn: Added commit message] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-20slimbus: remove redundant dev_err messageDing Xiang1-3/+1
devm_ioremap_resource already contains error message, so remove the redundant dev_err message Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-10slimbus: fix kerneldoc commentsJonathan Corbet1-6/+6
The kerneldoc comments in drivers/slimbus/stream.c were not properly formatted, leading to a distinctly unsatisfying "no structured comments found" warning in the docs build. Sprinkle some asterisks around so that the comments will be properly recognized. Signed-off-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-04-25slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_registerKangjie Lu1-0/+4
In case platform_device_alloc fails, the fix returns an error code to avoid the NULL pointer dereference. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22slimbus: core: add missing spin_lock_init on txn_lockSrinivas Kandagatla1-0/+1
Add missing spin lock intialization this also fixes the spinlock bad magic warning. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22slimbus: core: use slim_device_update_status() to update statusSrinivas Kandagatla1-19/+18
use slim_device_update_status() instead of directly calling the device_status() callback. Move slim_device_update_status() before probe to avoid forward declaration too. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22slimbus: core: do not call device_status under a lockSrinivas Kandagatla1-0/+3
Calling device_status callback under a lock would prevent drivers to do any slimbus trasactions which would invoke this lock like get_laddr(). Remove this unnecessary lock! Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-22slimbus: core: match full device idSrinivas Kandagatla1-1/+3
match full slim device id instead of just product and manufacture code, this will allow drivers to be much more specific to that device. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-06slimbus: ngd: fix spelling mistake "exeeds" -> "exceeds"Colin Ian King1-1/+1
There is a spelling mistake in a dev_err message, fix this. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-06slimbus: qcom-ctrl: simplify getting .driver_dataWolfram Sang1-4/+2
We should get 'driver_data' from 'struct device' directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-27slimbus: ngd: QCOM_QMI_HELPERS has to be selectedNiklas Cassel1-2/+3
QCOM_QMI_HELPERS is a hidden kconfig, so the proper usage is to select it, not depend upon it. Because of this change, we now also need to depend on the same Kconfigs as QCOM_QMI_HELPERS depends on. Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-27slimbus: ngd: Fix build error on x86Srinivas Kandagatla1-2/+3
on non DT platforms like x86 of_match_node is set to NULL, dereferencing directly would throw an error. Fix this by doing this in two steps, get the match then the data. Reported-by: Greg KH <gregkh@linuxfoundation.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-07slimbus: ngd: remove unnecessary checkSrinivas Kandagatla2-9/+0
SLIM_MSG_CLK_PAUSE_SEQ_FLG is never set in any of the slim core, so performing a check in ngd driver is totally unnecessary. Also this patch fixes warning about mc field overflow reported with CoverityScan. Making clk pause feature optional will be added to slim core in next development cycle. Reported-by: Colin Ian King <colin.king@canonical.com> Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: core: add support to ueventSrinivas Kandagatla1-0/+14
This patch adds support to uevent to help automatic module loading. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: core: update device status in probeSrinivas Kandagatla1-1/+16
device status update can be racy with probe in some cases, so make sure it take lock during the probe. Also after probe the device is expected to be ready for communications, so make sure that a logical address can be assigned to it after probe. If it fails to do so then probe defer such instances. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: core: match device tree based devices correctlySrinivas Kandagatla1-1/+5
device_id for device tree based devices come from dt compatible string, such drivers need not provide non dt style device id table. Match those device using compatible strings. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: validate logical address assigned by remoteSrinivas Kandagatla1-0/+4
Validate logical address assigned by remote, in failure cases this value is all zeors. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25silmbus: ngd: register controller after power up.Srinivas Kandagatla1-9/+11
Register slimbus controller only after finishing powerup sequnce so that we do not endup in situation where core starts sending transactions before the controller is ready. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: return proper error code instead of zeroSrinivas Kandagatla1-1/+1
It looks like there is a typo in probe return. Fix it. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-25slimbus: ngd: register ngd driver only once.Srinivas Kandagatla1-1/+1
Move ngd platform driver out of loop so that it registers only once. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-14slimbus: ngd: mark PM functions as __maybe_unusedArnd Bergmann1-4/+2
qcom_slim_ngd_runtime_suspend is protected by an #ifdef, qcom_slim_ngd_runtime_idle is now, which causes a build time warning: drivers/slimbus/qcom-ngd-ctrl.c:1470:12: error: 'qcom_slim_ngd_runtime_idle' defined but not used [-Werror=unused-function] Marking both as __maybe_unused lets us get rid of the warning as well as the #ifdef. Fixes: 917809e2280b ("slimbus: ngd: Add qcom SLIMBus NGD driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-08slimbus: stream: Fix htmldocs warningsSrinivas Kandagatla1-2/+1
This patch fixes below warning during building htmldoc: slimbus.h:352: warning: Function parameter or member 'name' not described in 'slim_stream_runtime' This patch also removes documentation for state variable in struct slim_stream_runtime which was redundant and removed. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: ngd: add stream supportSrinivas Kandagatla1-2/+147
This patch adds support to stream support, this involve implementing user specific implementation of Data channel management and channel management SLIMbus messages. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: stream: add stream supportSrinivas Kandagatla4-1/+669
This patch adds support to SLIMbus stream apis for slimbus device. SLIMbus streaming involves adding support to Data Channel Management and channel Reconfiguration Messages to slim core plus few stream apis. >From slim device side the apis are very simple mostly inline with other stream apis. Currently it only supports Isochronous and Push/Pull transport protocols, which are sufficient for audio use cases. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: ngd: Add qcom SLIMBus NGD driverSrinivas Kandagatla4-0/+1403
This patch adds suppor to Qualcomm SLIMBus Non-Generic Device (NGD) controller driver. This is light-weight SLIMBus controller driver responsible for communicating with slave HW directly over the bus using messaging interface, and communicating with master component residing on ADSP for bandwidth and data-channel management Based on intial work from Karthikeyan Ramasubramanian <kramasub@codeaurora.org> and Sagar Dharia <sdharia@codeaurora.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Tested-by: Craig Tatlor <ctatlor97@gmail.com> Reviewed-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: messaging: add slim_alloc/free_txn_tid()Srinivas Kandagatla2-22/+54
This patch adds slim_alloc_txn_tid() and slim_free_txn_tid() api to allow controllers like ngd to allocate tids for user specific commands. This also cleans up the existing code to use single place for tid allocations and free. This patch also make the tid allocation cyclic one, its very useful to track the transactions back during debug. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: core: add of_slim_device_get() helperSrinivas Kandagatla1-0/+39
On SLIMBus controllers like Qcom NGD(non ported device), controller can request logical address once the remote side is powered, having a helper function like this to explicitly enumerate the bus is helpful. Also codec drivers which are taking to interface device would need such a helper too. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-07slimbus: qcom: remove redundant depends in KconfigSrinivas Kandagatla1-1/+0
QCOM SLIMBus controller is already under a 'if SLIMBUS' in Kconfig, having depends on SLIMBUS is totally redundant. Just remove it. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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