Re: 答复: [PATCH] bus: mhi: core: Add support MHI EE FP for download firmware
From: Jeffrey Hugo
Date: Wed Oct 28 2020 - 18:21:57 EST
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@xxxxxxxxxxx wrote:
From: "carl.yin" <carl.yin@xxxxxxxxxxx>
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@xxxxxxxxxxx>
---
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.