Adds freeze, thaw and restore callbacks for hibernate and restore
functionality.
Signed-off-by: Anjana Hari <quic_ahari@xxxxxxxxxxx>
---
drivers/ufs/core/ufshcd.c | 62 +++++++++++++++++++++++++++++++++++++
drivers/ufs/host/ufs-qcom.c | 6 +++-
include/ufs/ufshcd.h | 8 +++++
3 files changed, 75 insertions(+), 1 deletion(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index fcd46251f7a8..d68222bb73ad 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -9826,11 +9826,36 @@ static int ufshcd_resume(struct ufs_hba *hba)
/* enable the host irq as host controller would be active soon */
ufshcd_enable_irq(hba);
+
+ if (hba->restore) {
+ /* Configure UTRL and UTMRL base address registers */
+ ufshcd_writel(hba, lower_32_bits(hba->utrdl_dma_addr),
+ REG_UTP_TRANSFER_REQ_LIST_BASE_L);
+ ufshcd_writel(hba, upper_32_bits(hba->utrdl_dma_addr),
+ REG_UTP_TRANSFER_REQ_LIST_BASE_H);
+ ufshcd_writel(hba, lower_32_bits(hba->utmrdl_dma_addr),
+ REG_UTP_TASK_REQ_LIST_BASE_L);
+ ufshcd_writel(hba, upper_32_bits(hba->utmrdl_dma_addr),
+ REG_UTP_TASK_REQ_LIST_BASE_H);
+ /* Make sure that UTRL and UTMRL base address registers
+ * are updated with the latest queue addresses. Only after
+ * updating these addresses, we can queue the new commands.
+ */
+ mb();
+ }
+
+ /* Resuming from hibernate, assume that link was OFF */
+ if (hba->restore)
+ ufshcd_set_link_off(hba);
+
goto out;
disable_vreg:
ufshcd_vreg_set_lpm(hba);
out:
+ if (hba->restore)
+ hba->restore = false;
+
if (ret)
ufshcd_update_evt_hist(hba, UFS_EVT_RESUME_ERR, (u32)ret);
return ret;
@@ -9989,6 +10014,43 @@ void ufshcd_remove(struct ufs_hba *hba)
}
EXPORT_SYMBOL_GPL(ufshcd_remove);
+int ufshcd_system_freeze(struct device *dev)
+{
+
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+ int ret = 0;
+
+ /*
+ * Run time resume the controller to make sure
+ * the PM work queue threads do not try to resume
+ * the child (scsi host), which leads to errors as
+ * the controller is not yet resumed.
+ */
+ pm_runtime_get_sync(hba->dev);
+ ret = ufshcd_system_suspend(dev);
+ pm_runtime_put_sync(hba->dev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ufshcd_system_freeze);
+
+int ufshcd_system_restore(struct device *dev)
+{
+
+ struct ufs_hba *hba = dev_get_drvdata(dev);
+
+ hba->restore = true;
+ return ufshcd_system_resume(dev);
+
+}
+EXPORT_SYMBOL_GPL(ufshcd_system_restore);
+
+int ufshcd_system_thaw(struct device *dev)
+{
+ return ufshcd_system_resume(dev);
+}
+EXPORT_SYMBOL_GPL(ufshcd_system_thaw);
+
/**
* ufshcd_dealloc_host - deallocate Host Bus Adapter (HBA)
* @hba: pointer to Host Bus Adapter (HBA)
diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c
index 681da3ea7154..c92e041c5361 100644
--- a/drivers/ufs/host/ufs-qcom.c
+++ b/drivers/ufs/host/ufs-qcom.c
@@ -1714,10 +1714,14 @@ MODULE_DEVICE_TABLE(acpi, ufs_qcom_acpi_match);
#endif
static const struct dev_pm_ops ufs_qcom_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
.prepare = ufshcd_suspend_prepare,
.complete = ufshcd_resume_complete,
+ .suspend = ufshcd_system_suspend,
+ .resume = ufshcd_system_resume,
+ .freeze = ufshcd_system_freeze,
+ .restore = ufshcd_system_restore,
+ .thaw = ufshcd_system_thaw,
};
static struct platform_driver ufs_qcom_pltform = {
diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
index 1779238d8a56..6f50390ca262 100644
--- a/include/ufs/ufshcd.h
+++ b/include/ufs/ufshcd.h
@@ -1071,6 +1071,9 @@ struct ufs_hba {
struct ufs_hw_queue *uhq;
struct ufs_hw_queue *dev_cmd_queue;
struct ufshcd_mcq_opr_info_t mcq_opr[OPR_MAX];
+
+ /* Distinguish between resume and restore */
+ bool restore;
};
/**
@@ -1278,6 +1281,11 @@ extern int ufshcd_system_suspend(struct device *dev);
extern int ufshcd_system_resume(struct device *dev);
#endif
extern int ufshcd_shutdown(struct ufs_hba *hba);
+
+extern int ufshcd_system_freeze(struct device *dev);
+extern int ufshcd_system_thaw(struct device *dev);
+extern int ufshcd_system_restore(struct device *dev);
+
extern int ufshcd_dme_configure_adapt(struct ufs_hba *hba,
int agreed_gear,
int adapt_val);
--
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