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* soundwire: bus: Fix device found flag correctlySrinivas Kandagatla2021-05-221-1/+2
| | | | | | | | | | | | | | | | | [ Upstream commit f03690f4f6992225d05dbd1171212e5be5a370dd ] found flag is used to indicate SoundWire devices that are both enumerated on the bus and available in the device list. However this flag is not reset correctly after one iteration, This could miss some of the devices that are enumerated on the bus but not in device list. So reset this correctly to fix this issue! Fixes: d52d7a1be02c ("soundwire: Add Slave status handling helpers") Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20210309104816.20350-1-srinivas.kandagatla@linaro.org Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
* soundwire: Initialize completion for defer messagesShreyas NC2019-11-201-0/+1
| | | | | | | | | | | | | | | | | | [ Upstream commit a306a0e4a5326269b6c78d136407f08433ab5ece ] Deferred messages are async messages used to synchronize transitions mostly while doing a bank switch on multi links. On successful transitions these messages are marked complete and thereby confirming that all the buses performed bank switch successfully. So, initialize the completion structure for the same. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
* soundwire: bus: set initial value to port_statusBard Liao2019-11-121-1/+1
| | | | | | | | | | | | | | commit f1fac63af678b2fc1044ca71fedf1f2ae8bf7c3b upstream. port_status[port_num] are assigned for each port_num in some if conditions. So some of the port_status may not be initialized. Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20190829181135.16049-1-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add stream configuration APIsSanyog Kale2018-05-111-0/+9
| | | | | | | | Add APIs for prepare, enable, disable and de-prepare stream. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* soundwire: Add bank switch routineSanyog Kale2018-05-111-0/+7
| | | | | | | | | SoundWire supports two registers banks. So, program the alternate bank with new configuration and then performs bank switch. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* soundwire: Add helpers for ports operationsSanyog Kale2018-05-111-0/+26
| | | | | | | | | Add helpers to configure, prepare, enable, disable and de-prepare ports. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* soundwire: Add support for SoundWire stream managementSanyog Kale2018-05-111-0/+1
| | | | | | | | | | This patch adds APIs and relevant stream data structures for initialization and release of stream. Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
* soundwire: Fix a signedness bugDan Carpenter2018-01-221-2/+2
| | | | | | | | | | | "ret" is an int and "buf" is a u8. sdw_read() returns negative error codes which are truncated to the u8, 0-255 range before being stored as an int. It means that "ret" can't be less than zero. Fixes: b0a9c37b0178 ("soundwire: Add slave status handling") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Fix incorrect return value checkShreyas NC2018-01-091-2/+2
| | | | | | | | | | | pm_runtime_get_sync will return negative values for error and 0 or 1 for success. Update the error check accordingly. Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Fixes: 9d715fa005eb: ("soundwire: Add IO transfer") Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Fix typo in return value check of sdw_read()Wei Yongjun2018-01-081-5/+5
| | | | | | | | | | Fix the typo, 'status' should be instead of 'status2'. Fixes: b0a9c37b0178 ("soundwire: Add slave status handling") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: fix sign extension when shifting buf[2] 24 placesColin Ian King2018-01-081-2/+2
| | | | | | | | | | | | | | | | The buf[2] left shift by 24 bits is promoted to int (32 bit signed) and then signed-extended to unsigned long long. Hence if the upper bit to buf[2] is set then all the upper bits of addr end up as 1. Fix this by casting it to u64 before shifting it. Also replace the unsigned long long casts to u64 casts to match the same type of addr. Detected by CoverityScan, CID#1463147 ("Unintended sign extension") Fixes: d52d7a1be02c ("soundwire: Add Slave status handling helpers") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add slave status handlingVinod Koul2017-12-191-0/+379
| | | | | | | | | | | | | Add status handling API sdw_handle_slave_status() to handle Slave status changes. Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add Slave status handling helpersSanyog Kale2017-12-191-0/+214
| | | | | | | | | | | | | SoundWire Slaves report status to bus. Add helpers to handle the status changes. Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add IO transferVinod Koul2017-12-191-0/+272
| | | | | | | | | | | | | | SoundWire bus supports read or write register(s) for SoundWire Slave device. sdw_read() and sdw_write() APIs are provided for single register read/write. sdw_nread() and sdw_nwrite() for operations on contiguous registers. Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add MIPI DisCo property helpersVinod Koul2017-12-191-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | MIPI Discovery And Configuration (DisCo) Specification for SoundWire specifies properties to be implemented for SoundWire Masters and Slaves. The DisCo spec doesn't mandate these properties. However, SDW bus cannot work without knowing these values. The helper functions read the Master and Slave properties. Implementers of Master or Slave drivers can use any of the below three mechanisms: a) Use these APIs here as .read_prop() callback for Master and Slave b) Implement own methods and set those as .read_prop(), but invoke APIs in this file for generic read and override the values with platform specific data c) Implement ones own methods which do not use anything provided here Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* soundwire: Add Master registrationVinod Koul2017-12-191-0/+124
A Master adds a SoundWire bus instance which scans the firmware provided for device description. In this patch we scan ACPI namespaces and create SoundWire Slave devices based on ACPI description Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-By: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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