diff options
| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2022-04-05 19:27:45 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-26 13:17:41 +0200 |
| commit | fb3a26b7e8aff11e44d582604f61c38f63bd507c (patch) | |
| tree | 221cf10a4aba8f2ffac6eb836bbf9851c76c79eb /include | |
| parent | 4799e71b082615445dc40ba0bbb86cbb76c24724 (diff) | |
bus: mhi: ep: Add support for powering up the MHI endpoint stack
Add support for MHI endpoint power_up that includes initializing the MMIO
and rings, caching the host MHI registers, and setting the MHI state to M0.
After registering the MHI EP controller, the stack has to be powered up
for usage.
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20220405135754.6622-10-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mhi_ep.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h index 137bd3ee2e43..3b065f82fbeb 100644 --- a/include/linux/mhi_ep.h +++ b/include/linux/mhi_ep.h @@ -65,6 +65,9 @@ struct mhi_ep_db_info { * @ch_ctx_host_pa: Physical address of host channel context data structure * @ev_ctx_host_pa: Physical address of host event context data structure * @cmd_ctx_host_pa: Physical address of host command context data structure + * @ch_ctx_cache_phys: Physical address of the host channel context cache + * @ev_ctx_cache_phys: Physical address of the host event context cache + * @cmd_ctx_cache_phys: Physical address of the host command context cache * @chdb: Array of channel doorbell interrupt info * @event_lock: Lock for protecting event rings * @list_lock: Lock for protecting state transition and channel doorbell lists @@ -87,6 +90,7 @@ struct mhi_ep_db_info { * @erdb_offset: Event ring doorbell offset set by the host * @index: MHI Endpoint controller index * @irq: IRQ used by the endpoint controller + * @enabled: Check if the endpoint controller is enabled or not */ struct mhi_ep_cntrl { struct device *cntrl_dev; @@ -104,6 +108,9 @@ struct mhi_ep_cntrl { u64 ch_ctx_host_pa; u64 ev_ctx_host_pa; u64 cmd_ctx_host_pa; + phys_addr_t ch_ctx_cache_phys; + phys_addr_t ev_ctx_cache_phys; + phys_addr_t cmd_ctx_cache_phys; struct mhi_ep_db_info chdb[4]; struct mutex event_lock; @@ -134,6 +141,7 @@ struct mhi_ep_cntrl { u32 erdb_offset; u32 index; int irq; + bool enabled; }; /** @@ -228,4 +236,12 @@ int mhi_ep_register_controller(struct mhi_ep_cntrl *mhi_cntrl, */ void mhi_ep_unregister_controller(struct mhi_ep_cntrl *mhi_cntrl); +/** + * mhi_ep_power_up - Power up the MHI endpoint stack + * @mhi_cntrl: MHI Endpoint controller + * + * Return: 0 if power up succeeds, a negative error code otherwise. + */ +int mhi_ep_power_up(struct mhi_ep_cntrl *mhi_cntrl); + #endif |