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| author | Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> | 2020-02-20 12:58:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-19 09:41:05 +0300 |
| commit | 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 (patch) | |
| tree | c58571d93d2b0dab10741dac62978088846ebda1 /include/linux/mhi.h | |
| parent | 6fdfdd27328ceef39f4b8daec3510874ad68e753 (diff) | |
| download | linux-1d3173a3bae7039b765a0956e3e4bf846dbaacb8.tar.xz | |
bus: mhi: core: Add support for processing events from client device
This commit adds support for processing the MHI data and control
events from the client device. The client device can report various
events such as EE events, state change events by interrupting the
host through IRQ and adding events to the event rings allocated by
the host during initialization.
This is based on the patch submitted by Sujeev Dias:
https://lkml.org/lkml/2018/7/9/988
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
[mani: splitted the data transfer patch and cleaned up for upstream]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Tested-by: Jeffrey Hugo <jhugo@codeaurora.org>
Link: https://lore.kernel.org/r/20200220095854.4804-11-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/mhi.h')
| -rw-r--r-- | include/linux/mhi.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/mhi.h b/include/linux/mhi.h index d3453a1de835..bf8921ee0805 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -31,6 +31,7 @@ struct mhi_buf_info; * @MHI_CB_EE_MISSION_MODE: MHI device entered Mission Mode exec env * @MHI_CB_SYS_ERROR: MHI device entered error state (may recover) * @MHI_CB_FATAL_ERROR: MHI device entered fatal error state + * @MHI_CB_BW_REQ: Received a bandwidth switch request from device */ enum mhi_callback { MHI_CB_IDLE, @@ -41,6 +42,7 @@ enum mhi_callback { MHI_CB_EE_MISSION_MODE, MHI_CB_SYS_ERROR, MHI_CB_FATAL_ERROR, + MHI_CB_BW_REQ, }; /** @@ -93,6 +95,16 @@ struct image_info { }; /** + * struct mhi_link_info - BW requirement + * target_link_speed - Link speed as defined by TLS bits in LinkControl reg + * target_link_width - Link width as defined by NLW bits in LinkStatus reg + */ +struct mhi_link_info { + unsigned int target_link_speed; + unsigned int target_link_width; +}; + +/** * enum mhi_ee_type - Execution environment types * @MHI_EE_PBL: Primary Bootloader * @MHI_EE_SBL: Secondary Bootloader @@ -312,6 +324,7 @@ struct mhi_controller_config { * @transition_list: List of MHI state transitions * @transition_lock: Lock for protecting MHI state transition list * @wlock: Lock for protecting device wakeup + * @mhi_link_info: Device bandwidth info * @st_worker: State transition worker * @fw_worker: Firmware download worker * @syserr_worker: System error worker @@ -376,6 +389,7 @@ struct mhi_controller { struct list_head transition_list; spinlock_t transition_lock; spinlock_t wlock; + struct mhi_link_info mhi_link_info; struct work_struct st_worker; struct work_struct fw_worker; struct work_struct syserr_worker; |