diff options
| author | Carl Yin <carl.yin@quectel.com> | 2021-02-10 18:17:15 -0800 |
|---|---|---|
| committer | Loic Poulain <loic.poulain@linaro.org> | 2021-02-17 18:30:18 +0100 |
| commit | 2831bdc49d4e1b01da37da308c37fc7cc0d79631 (patch) | |
| tree | 4fcf75d604da848e15859410b9f7b9ab28b4dce3 | |
| parent | 89c4d4c4769b3fca240c7f6df429baa250f27f96 (diff) | |
bus: mhi: core: Add support for Flash Programmer execution environment
MHI WWAN modems support downloading firmware to NAND or eMMC
using Firehose protocol with process as follows:
1. Modem boots up, enters AMSS execution environment and a debug
hook forces the device to enter EDL mode from the host.
2. Modem enters SYS_ERROR, MHI host handles SYS_ERROR transition.
3. EDL image to enter 'Flash Programmer' execution environment is
flashed via BHI interface.
4. Modem enters MHI READY -> M0 and sends the Flash Programmer
execution environment change to host.
5. Following that, EDL channels (34, 35) are made available from
the host.
6. User space tool downloads firmware image to modem over the EDL
channels using Firehose protocol.
Make the necessary changes to allow for this sequence to occur and
allow using the Flash Programmer execution environment.
Signed-off-by: Carl Yin <carl.yin@quectel.com>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Co-developed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
| -rw-r--r-- | drivers/bus/mhi/core/init.c | 2 | ||||
| -rw-r--r-- | drivers/bus/mhi/core/internal.h | 1 | ||||
| -rw-r--r-- | drivers/bus/mhi/core/main.c | 3 | ||||
| -rw-r--r-- | drivers/bus/mhi/core/pm.c | 6 | ||||
| -rw-r--r-- | include/linux/mhi.h | 4 |
5 files changed, 15 insertions, 1 deletions
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index be4eebb0971b..0fbf82d15ac6 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -29,6 +29,7 @@ const char * const mhi_ee_str[MHI_EE_MAX] = { [MHI_EE_WFW] = "WFW", [MHI_EE_PTHRU] = "PASS THRU", [MHI_EE_EDL] = "EDL", + [MHI_EE_FP] = "FLASH PROGRAMMER", [MHI_EE_DISABLE_TRANSITION] = "DISABLE", [MHI_EE_NOT_SUPPORTED] = "NOT SUPPORTED", }; @@ -38,6 +39,7 @@ const char * const dev_state_tran_str[DEV_ST_TRANSITION_MAX] = { [DEV_ST_TRANSITION_READY] = "READY", [DEV_ST_TRANSITION_SBL] = "SBL", [DEV_ST_TRANSITION_MISSION_MODE] = "MISSION_MODE", + [DEV_ST_TRANSITION_FP] = "FLASH_PROGRAMMER", [DEV_ST_TRANSITION_SYS_ERR] = "SYS_ERR", [DEV_ST_TRANSITION_DISABLE] = "DISABLE", }; diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index 880084f122f1..19887f45fa81 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -386,6 +386,7 @@ enum dev_st_transition { DEV_ST_TRANSITION_READY, DEV_ST_TRANSITION_SBL, DEV_ST_TRANSITION_MISSION_MODE, + DEV_ST_TRANSITION_FP, DEV_ST_TRANSITION_SYS_ERR, DEV_ST_TRANSITION_DISABLE, DEV_ST_TRANSITION_MAX, diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index bbf6125d034a..7fc24820c55b 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -821,6 +821,9 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl, case MHI_EE_AMSS: st = DEV_ST_TRANSITION_MISSION_MODE; break; + case MHI_EE_FP: + st = DEV_ST_TRANSITION_FP; + break; case MHI_EE_RDDM: mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM); write_lock_irq(&mhi_cntrl->pm_lock); diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 2313fb94751d..0c7f113c8849 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -781,6 +781,12 @@ void mhi_pm_st_worker(struct work_struct *work) case DEV_ST_TRANSITION_MISSION_MODE: mhi_pm_mission_mode_transition(mhi_cntrl); break; + case DEV_ST_TRANSITION_FP: + write_lock_irq(&mhi_cntrl->pm_lock); + mhi_cntrl->ee = MHI_EE_FP; + write_unlock_irq(&mhi_cntrl->pm_lock); + mhi_create_devices(mhi_cntrl); + break; case DEV_ST_TRANSITION_READY: mhi_ready_state_transition(mhi_cntrl); break; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 8ad876c0d292..307fee7f582b 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -120,6 +120,7 @@ struct mhi_link_info { * @MHI_EE_WFW: WLAN firmware mode * @MHI_EE_PTHRU: Passthrough * @MHI_EE_EDL: Embedded downloader + * @MHI_EE_FP: Flash Programmer Environment */ enum mhi_ee_type { MHI_EE_PBL, @@ -129,7 +130,8 @@ enum mhi_ee_type { MHI_EE_WFW, MHI_EE_PTHRU, MHI_EE_EDL, - MHI_EE_MAX_SUPPORTED = MHI_EE_EDL, + MHI_EE_FP, + MHI_EE_MAX_SUPPORTED = MHI_EE_FP, MHI_EE_DISABLE_TRANSITION, /* local EE, not related to mhi spec */ MHI_EE_NOT_SUPPORTED, MHI_EE_MAX, |