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Date: Mon, 2 Aug 2021 10:42:48 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: gregkh@...uxfoundation.org
Cc: hemantk@...eaurora.org, bbhatt@...eaurora.org,
linux-arm-msm@...r.kernel.org, jhugo@...eaurora.org,
linux-kernel@...r.kernel.org, loic.poulain@...aro.org,
Jeffrey Hugo <quic_jhugo@...cinc.com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 03/10] bus: mhi: core: Set BHI/BHIe offsets on power up preparation
From: Bhaumik Bhatt <bbhatt@...eaurora.org>
Set the BHI and/or BHIe offsets in mhi_prepare_for_power_up(),
rearrange the function, and remove the equivalent from
mhi_async_power_up(). This helps consolidate multiple checks
in different parts of the driver and can help MHI fail early on
before power up begins if the offsets are not read correctly.
Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@...cinc.com>
Reviewed-by: Hemant Kumar <hemantk@...eaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Link: https://lore.kernel.org/r/1620330705-40192-2-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
drivers/bus/mhi/core/init.c | 42 ++++++++++++++++++++-----------------
drivers/bus/mhi/core/pm.c | 28 ++++---------------------
2 files changed, 27 insertions(+), 43 deletions(-)
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index c81b377fca8f..11c7a3d3c9bf 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1063,7 +1063,7 @@ EXPORT_SYMBOL_GPL(mhi_free_controller);
int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
{
struct device *dev = &mhi_cntrl->mhi_dev->dev;
- u32 bhie_off;
+ u32 bhi_off, bhie_off;
int ret;
mutex_lock(&mhi_cntrl->pm_mutex);
@@ -1072,29 +1072,36 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
if (ret)
goto error_dev_ctxt;
- /*
- * Allocate RDDM table if specified, this table is for debugging purpose
- */
- if (mhi_cntrl->rddm_size) {
- mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->rddm_image,
- mhi_cntrl->rddm_size);
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIOFF, &bhi_off);
+ if (ret) {
+ dev_err(dev, "Error getting BHI offset\n");
+ goto error_reg_offset;
+ }
+ mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
- /*
- * This controller supports RDDM, so we need to manually clear
- * BHIE RX registers since POR values are undefined.
- */
+ if (mhi_cntrl->fbc_download || mhi_cntrl->rddm_size) {
ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF,
&bhie_off);
if (ret) {
dev_err(dev, "Error getting BHIE offset\n");
- goto bhie_error;
+ goto error_reg_offset;
}
-
mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
+ }
+
+ if (mhi_cntrl->rddm_size) {
+ /*
+ * This controller supports RDDM, so we need to manually clear
+ * BHIE RX registers since POR values are undefined.
+ */
memset_io(mhi_cntrl->bhie + BHIE_RXVECADDR_LOW_OFFS,
0, BHIE_RXVECSTATUS_OFFS - BHIE_RXVECADDR_LOW_OFFS +
4);
-
+ /*
+ * Allocate RDDM table for debugging purpose if specified
+ */
+ mhi_alloc_bhie_table(mhi_cntrl, &mhi_cntrl->rddm_image,
+ mhi_cntrl->rddm_size);
if (mhi_cntrl->rddm_image)
mhi_rddm_prepare(mhi_cntrl, mhi_cntrl->rddm_image);
}
@@ -1103,11 +1110,8 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
return 0;
-bhie_error:
- if (mhi_cntrl->rddm_image) {
- mhi_free_bhie_table(mhi_cntrl, mhi_cntrl->rddm_image);
- mhi_cntrl->rddm_image = NULL;
- }
+error_reg_offset:
+ mhi_deinit_dev_ctxt(mhi_cntrl);
error_dev_ctxt:
mutex_unlock(&mhi_cntrl->pm_mutex);
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index bbf6cd04861e..ff7cdc8653ef 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -1059,28 +1059,8 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
if (ret)
goto error_setup_irq;
- /* Setup BHI offset & INTVEC */
+ /* Setup BHI INTVEC */
write_lock_irq(&mhi_cntrl->pm_lock);
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIOFF, &val);
- if (ret) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- goto error_bhi_offset;
- }
-
- mhi_cntrl->bhi = mhi_cntrl->regs + val;
-
- /* Setup BHIE offset */
- if (mhi_cntrl->fbc_download) {
- ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs, BHIEOFF, &val);
- if (ret) {
- write_unlock_irq(&mhi_cntrl->pm_lock);
- dev_err(dev, "Error reading BHIE offset\n");
- goto error_bhi_offset;
- }
-
- mhi_cntrl->bhie = mhi_cntrl->regs + val;
- }
-
mhi_write_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_INTVEC, 0);
mhi_cntrl->pm_state = MHI_PM_POR;
mhi_cntrl->ee = MHI_EE_MAX;
@@ -1091,7 +1071,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
if (!MHI_IN_PBL(current_ee) && current_ee != MHI_EE_AMSS) {
dev_err(dev, "Not a valid EE for power on\n");
ret = -EIO;
- goto error_bhi_offset;
+ goto error_async_power_up;
}
state = mhi_get_mhi_state(mhi_cntrl);
@@ -1110,7 +1090,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
if (!ret) {
ret = -EIO;
dev_info(dev, "Failed to reset MHI due to syserr state\n");
- goto error_bhi_offset;
+ goto error_async_power_up;
}
/*
@@ -1132,7 +1112,7 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl)
return 0;
-error_bhi_offset:
+error_async_power_up:
mhi_deinit_free_irq(mhi_cntrl);
error_setup_irq:
--
2.25.1
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