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Date: Wed, 28 Oct 2020 08:24:28 -0600
From: Jeffrey Hugo <jhugo@...eaurora.org>
To: Carl Yin(殷张成) <carl.yin@...ctel.com>,
Hemant Kumar <hemantk@...eaurora.org>,
"manivannan.sadhasivam@...aro.org" <manivannan.sadhasivam@...aro.org>,
"sfr@...b.auug.org.au" <sfr@...b.auug.org.au>
Cc: "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Naveen Kumar <naveen.kumar@...ctel.com>
Subject: Re: 答复: [PATCH] bus: mhi: core: Add support MHI EE FP for download firmware
On 10/27/2020 7:39 PM, Carl Yin(殷张成) wrote:
> Hi Hemant and Jeffery:
>
> On Wednesday, October 28, 2020 7:02 AM, hemantk wrote:
>> Hi Jeff,
>>
>> On 10/27/20 8:11 AM, Jeffrey Hugo wrote:
>>> On 10/27/2020 3:43 AM, carl.yin@...ctel.com wrote:
>>>> From: "carl.yin" <carl.yin@...ctel.com>
>>>>
>>>> MHI wwan modems support download firmware to nand or emmc by firehose
>>>> protocol, process as next:
>>>> 1. wwan modem normal bootup and enter EE AMSS, create mhi DIAG chan
>>>> device 2. send EDL cmd via DIAG chan, then modem enter EE EDL 3.
>>>> boot.c download 'firehose/prog_firehose_sdx55.mbn' via BHI interface
>>>> 4. modem enter EE FP, and create mhi EDL chan device 5. user space
>>>> tool download FW to modem via EDL chan by firehose protocol
>>>>
>>>> Signed-off-by: carl.yin <carl.yin@...ctel.com>
>>>> ---
>>>> drivers/bus/mhi/core/boot.c | 4 +++-
>>>> drivers/bus/mhi/core/init.c | 2 ++
>>>> drivers/bus/mhi/core/internal.h | 1 +
>>>> drivers/bus/mhi/core/main.c | 3 +++
>>>> drivers/bus/mhi/core/pm.c | 16 +++++++++++++++-
>>>> include/linux/mhi.h | 4 +++-
>>>> 6 files changed, 27 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/drivers/bus/mhi/core/boot.c
>>>> b/drivers/bus/mhi/core/boot.c index 24422f5..ab39ad6 100644
>>>> --- a/drivers/bus/mhi/core/boot.c
>>>> +++ b/drivers/bus/mhi/core/boot.c
>>>> @@ -460,8 +460,10 @@ void mhi_fw_load_handler(struct mhi_controller
>>>> *mhi_cntrl)
>>>> return;
>>>> }
>>>> - if (mhi_cntrl->ee == MHI_EE_EDL)
>>>> + if (mhi_cntrl->ee == MHI_EE_EDL) {
>>>> + mhi_ready_state_transition(mhi_cntrl);
>>>> return;
>>>> + }
>>>> write_lock_irq(&mhi_cntrl->pm_lock);
>>>> mhi_cntrl->dev_state = MHI_STATE_RESET; diff --git
>>>> a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index
>>>> ac4aa5c..9c2c2f3 100644
>>>> --- a/drivers/bus/mhi/core/init.c
>>>> +++ b/drivers/bus/mhi/core/init.c
>>>> @@ -26,6 +26,7 @@ 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] = "FP",
>>>> [MHI_EE_DISABLE_TRANSITION] = "DISABLE",
>>>> [MHI_EE_NOT_SUPPORTED] = "NOT SUPPORTED",
>>>> };
>>>> @@ -35,6 +36,7 @@ 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] = "FP",
>>>> [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 4abf0cf..6ae897a 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 3950792..e307b58 100644
>>>> --- a/drivers/bus/mhi/core/main.c
>>>> +++ b/drivers/bus/mhi/core/main.c
>>>> @@ -782,6 +782,9 @@ int mhi_process_ctrl_ev_ring(struct
>>>> mhi_controller *mhi_cntrl,
>>>> case MHI_EE_SBL:
>>>> st = DEV_ST_TRANSITION_SBL;
>>>> break;
>>>> + case MHI_EE_FP:
>>>> + st = DEV_ST_TRANSITION_FP;
>>>> + break;
>>>> case MHI_EE_WFW:
>>>> case MHI_EE_AMSS:
>>>> st = DEV_ST_TRANSITION_MISSION_MODE; diff
>> --git
>>>> a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index
>>>> 3de7b16..3c95a5d 100644
>>>> --- a/drivers/bus/mhi/core/pm.c
>>>> +++ b/drivers/bus/mhi/core/pm.c
>>>> @@ -563,7 +563,15 @@ static void mhi_pm_disable_transition(struct
>>>> mhi_controller *mhi_cntrl,
>>>> }
>>>> if (cur_state == MHI_PM_SYS_ERR_PROCESS) {
>>>> - mhi_ready_state_transition(mhi_cntrl);
>>>> + if (mhi_get_exec_env(mhi_cntrl) == MHI_EE_EDL
>>>> + && mhi_get_mhi_state(mhi_cntrl) == MHI_STATE_RESET) {
>>>> + write_lock_irq(&mhi_cntrl->pm_lock);
>>>> + cur_state = mhi_tryset_pm_state(mhi_cntrl,
>> MHI_PM_POR);
>>>> + write_unlock_irq(&mhi_cntrl->pm_lock);
>>>> + mhi_queue_state_transition(mhi_cntrl,
>>>> DEV_ST_TRANSITION_PBL);
>>>> + } else {
>>>> + mhi_ready_state_transition(mhi_cntrl);
>>>> + }
>>>> } else {
>>>> /* Move to disable state */
>>>> write_lock_irq(&mhi_cntrl->pm_lock);
>>>> @@ -658,6 +666,12 @@ 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
>>>> 6e1122c..4620af8 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,
>>>>
>>>
>>> This gets a NACK from me. I don't see the FP_EE that this patch
>>> introduces defined in the spec. Where did it come from?
>>>
>> There is indeed a FP EE, BHI spec will be updated with this EE next month.
>>
>> Basically, once device goes to EDL, flash programmer image is downloaded using
>> BHI protocol (same as we download SBL image using BHI from PBL in current use
>> case). Once it is downloaded intvec sends EE change event for FP. Also event is
>> generated for the same which is used to create EDL channels (34, 35) which is
>> used by flash programmer to flash image for AMSS.
>>
> [carl.yin] I am refer to QUALLCOMM's windows MHI driver.
> And the patch work well on my SDX24&SDX55 modems.
> I can use it to upgrade my modems.
Linaro has an opensource utility that implements firehose -
https://github.com/andersson/qdl
Did you test with that?
--
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
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