From: Bhaumik Bhatt <bbhatt@codeaurora.org>
To: manivannan.sadhasivam@linaro.org
Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org,
jhugo@codeaurora.org, linux-kernel@vger.kernel.org,
Bhaumik Bhatt <bbhatt@codeaurora.org>
Subject: [PATCH v7 09/11] bus: mhi: core: Read and save device hardware information from BHI
Date: Mon, 10 Aug 2020 15:01:03 -0700 [thread overview]
Message-ID: <1597096865-19636-10-git-send-email-bbhatt@codeaurora.org> (raw)
In-Reply-To: <1597096865-19636-1-git-send-email-bbhatt@codeaurora.org>
Device hardware specific information such as serial number and the OEM
PK hash can be read using BHI and saved on host to identify the
endpoint.
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/bus/mhi/core/boot.c | 17 ++++++++++++++++-
include/linux/mhi.h | 6 ++++++
2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c
index 0b38014..24422f5 100644
--- a/drivers/bus/mhi/core/boot.c
+++ b/drivers/bus/mhi/core/boot.c
@@ -392,13 +392,28 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
void *buf;
dma_addr_t dma_addr;
size_t size;
- int ret;
+ int i, ret;
if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
dev_err(dev, "Device MHI is not in valid state\n");
return;
}
+ /* save hardware info from BHI */
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_SERIALNU,
+ &mhi_cntrl->serial_number);
+ if (ret)
+ dev_err(dev, "Could not capture serial number via BHI\n");
+
+ for (i = 0; i < ARRAY_SIZE(mhi_cntrl->oem_pk_hash); i++) {
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->bhi, BHI_OEMPKHASH(i),
+ &mhi_cntrl->oem_pk_hash[i]);
+ if (ret) {
+ dev_err(dev, "Could not capture OEM PK HASH via BHI\n");
+ break;
+ }
+ }
+
/* If device is in pass through, do reset to ready state transition */
if (mhi_cntrl->ee == MHI_EE_PTHRU)
goto fw_load_ee_pthru;
diff --git a/include/linux/mhi.h b/include/linux/mhi.h
index 3a3e857..4065762 100644
--- a/include/linux/mhi.h
+++ b/include/linux/mhi.h
@@ -16,6 +16,8 @@
#include <linux/wait.h>
#include <linux/workqueue.h>
+#define MHI_MAX_OEM_PK_HASH_SEGMENTS 16
+
struct mhi_chan;
struct mhi_event;
struct mhi_ctxt;
@@ -317,6 +319,8 @@ struct mhi_controller_config {
* @device_number: MHI controller device number
* @major_version: MHI controller major revision number
* @minor_version: MHI controller minor revision number
+ * @serial_number: MHI controller serial number obtained from BHI
+ * @oem_pk_hash: MHI controller OEM PK Hash obtained from BHI
* @mhi_event: MHI event ring configurations table
* @mhi_cmd: MHI command ring configurations table
* @mhi_ctxt: MHI device context, shared memory between host and device
@@ -396,6 +400,8 @@ struct mhi_controller {
u32 device_number;
u32 major_version;
u32 minor_version;
+ u32 serial_number;
+ u32 oem_pk_hash[MHI_MAX_OEM_PK_HASH_SEGMENTS];
struct mhi_event *mhi_event;
struct mhi_cmd *mhi_cmd;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2020-08-10 22:01 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 22:00 [PATCH v7 00/11] Introduce features and debugfs/sysfs entries for MHI Bhaumik Bhatt
2020-08-10 22:00 ` [PATCH v7 01/11] bus: mhi: core: Remove double occurrence for mhi_ctrl_ev_task() declaration Bhaumik Bhatt
2020-08-10 22:00 ` [PATCH v7 02/11] bus: mhi: core: Abort suspends due to outgoing pending packets Bhaumik Bhatt
2020-08-10 22:00 ` [PATCH v7 03/11] bus: mhi: core: Use helper API to trigger a non-blocking host resume Bhaumik Bhatt
2020-08-10 22:00 ` [PATCH v7 04/11] bus: mhi: core: Trigger host resume if suspended during mhi_device_get() Bhaumik Bhatt
2020-08-10 22:00 ` [PATCH v7 05/11] bus: mhi: core: Use generic name field for an MHI device Bhaumik Bhatt
2020-08-10 22:01 ` [PATCH v7 06/11] bus: mhi: core: Introduce helper function to check device state Bhaumik Bhatt
2020-08-10 22:01 ` [PATCH v7 07/11] bus: mhi: core: Introduce counters to track MHI device state transitions Bhaumik Bhatt
2020-08-10 22:01 ` [PATCH v7 08/11] bus: mhi: core: Introduce debugfs entries for MHI Bhaumik Bhatt
2020-08-11 0:30 ` kernel test robot
2020-08-11 6:24 ` Manivannan Sadhasivam
2020-08-10 22:01 ` Bhaumik Bhatt [this message]
2020-08-10 22:01 ` [PATCH v7 10/11] bus: mhi: core: Introduce APIs to allocate and free the MHI controller Bhaumik Bhatt
2020-08-10 22:01 ` [PATCH v7 11/11] bus: mhi: core: Introduce sysfs entries for MHI Bhaumik Bhatt
2020-08-11 6:18 ` Manivannan Sadhasivam
2020-08-11 6:26 ` [PATCH v7 00/11] Introduce features and debugfs/sysfs " Manivannan Sadhasivam
2020-08-11 17:53 ` bbhatt
2020-08-18 9:52 ` Manivannan Sadhasivam
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