@@ -802,12 +802,12 @@ static int parse_config(struct mhi_controller *mhi_cntrl,
int mhi_register_controller(struct mhi_controller *mhi_cntrl,
struct mhi_controller_config *config)
{
- int ret;
- int i;
struct mhi_event *mhi_event;
struct mhi_chan *mhi_chan;
struct mhi_cmd *mhi_cmd;
struct mhi_device *mhi_dev;
+ u32 soc_info;
+ int ret, i;
if (!mhi_cntrl)
return -EINVAL;
@@ -874,6 +874,21 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
mhi_cntrl->unmap_single = mhi_unmap_single_no_bb;
}
+ /* Read the MHI device info */
+ ret = mhi_read_reg(mhi_cntrl, mhi_cntrl->regs,
+ SOC_HW_VERSION_OFFS, &soc_info);
+ if (ret)
+ goto error_alloc_dev;
+
+ mhi_cntrl->family_number = (soc_info & SOC_HW_VERSION_FAM_NUM_BMSK) >>
+ SOC_HW_VERSION_FAM_NUM_SHFT;
+ mhi_cntrl->device_number = (soc_info & SOC_HW_VERSION_DEV_NUM_BMSK) >>
+ SOC_HW_VERSION_DEV_NUM_SHFT;
+ mhi_cntrl->major_version = (soc_info & SOC_HW_VERSION_MAJOR_VER_BMSK) >>
+ SOC_HW_VERSION_MAJOR_VER_SHFT;
+ mhi_cntrl->minor_version = (soc_info & SOC_HW_VERSION_MINOR_VER_BMSK) >>
+ SOC_HW_VERSION_MINOR_VER_SHFT;
+
/* Register controller with MHI bus */
mhi_dev = mhi_alloc_device(mhi_cntrl);
if (IS_ERR(mhi_dev)) {
@@ -196,6 +196,16 @@ extern struct bus_type mhi_bus_type;
#define BHIE_RXVECSTATUS_STATUS_XFER_COMPL (0x02)
#define BHIE_RXVECSTATUS_STATUS_ERROR (0x03)
+#define SOC_HW_VERSION_OFFS (0x224)
+#define SOC_HW_VERSION_FAM_NUM_BMSK (0xF0000000)
+#define SOC_HW_VERSION_FAM_NUM_SHFT (28)
+#define SOC_HW_VERSION_DEV_NUM_BMSK (0x0FFF0000)
+#define SOC_HW_VERSION_DEV_NUM_SHFT (16)
+#define SOC_HW_VERSION_MAJOR_VER_BMSK (0x0000FF00)
+#define SOC_HW_VERSION_MAJOR_VER_SHFT (8)
+#define SOC_HW_VERSION_MINOR_VER_BMSK (0x000000FF)
+#define SOC_HW_VERSION_MINOR_VER_SHFT (0)
+
#define EV_CTX_RESERVED_MASK GENMASK(7, 0)
#define EV_CTX_INTMODC_MASK GENMASK(15, 8)
#define EV_CTX_INTMODC_SHIFT 8
@@ -310,6 +310,10 @@ struct mhi_controller_config {
* @sw_ev_rings: Number of software event rings
* @nr_irqs_req: Number of IRQs required to operate (optional)
* @nr_irqs: Number of IRQ allocated by bus master (required)
+ * @family_number: MHI controller family number
+ * @device_number: MHI controller device number
+ * @major_version: MHI controller major revision number
+ * @minor_version: MHI controller minor revision number
* @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
@@ -375,6 +379,10 @@ struct mhi_controller {
u32 sw_ev_rings;
u32 nr_irqs_req;
u32 nr_irqs;
+ u32 family_number;
+ u32 device_number;
+ u32 major_version;
+ u32 minor_version;
struct mhi_event *mhi_event;
struct mhi_cmd *mhi_cmd;
The MHI register base has several registers used for getting the MHI specific information such as version, family, major, and minor numbers from the device. This information can be used by the controller drivers for usecases such as applying quirks for a specific revision etc... While at it, let's also rearrange the local variables in mhi_register_controller(). Suggested-by: Hemant Kumar <hemantk@codeaurora.org> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> --- drivers/bus/mhi/core/init.c | 19 +++++++++++++++++-- drivers/bus/mhi/core/internal.h | 10 ++++++++++ include/linux/mhi.h | 8 ++++++++ 3 files changed, 35 insertions(+), 2 deletions(-)