[PATCH v2 2/5] firmware: imx: scu-irq: Add API to retrieve status of IRQ

franck.lenormand
2020-07-21T15:20:50Z

From: Franck LENORMAND <franck.lenormand@oss.nxp.com>

This patch adds the API to retrieve the status of an IRQ.

It also adds values used to process SECVIO IRQ from the SCU.

Signed-off-by: Franck LENORMAND <franck.lenormand@oss.nxp.com>
---
drivers/firmware/imx/imx-scu-irq.c | 37 ++++++++++++++++++++++++++++++++++++-
include/linux/firmware/imx/sci.h | 4 ++++
2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/imx/imx-scu-irq.c b/drivers/firmware/imx/imx-scu-irq.c
index d9dcc20..d31d600 100644
--- a/drivers/firmware/imx/imx-scu-irq.c
+++ b/drivers/firmware/imx/imx-scu-irq.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * Copyright 2019 NXP
+ * Copyright 2019-2020 NXP
*
* Implementation of the SCU IRQ functions using MU.
*
@@ -97,6 +97,41 @@ static void imx_scu_irq_work_handler(struct work_struct *work)
}
}

+/**
+ * imx_scu_irq_get_status() - Get the status of the IRQs of a group
+ *
+ * @group: The group of IRQ to retrieve status
+ * @irq_status: Status of the IRQs retrieved
+ *
+ * Return:
+ * 0 - OK
+ * < 0 - error.
+ */
+int imx_scu_irq_get_status(u8 group, u32 *irq_status)
+{
+ struct imx_sc_msg_irq_get_status msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+ int ret;
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_IRQ;
+ hdr->func = IMX_SC_IRQ_FUNC_STATUS;
+ hdr->size = 2;
+
+ msg.data.req.resource = mu_resource_id;
+ msg.data.req.group = group;
+
+ ret = imx_scu_call_rpc(imx_sc_irq_ipc_handle, &msg, true);
+ if (ret)
+ return ret;
+
+ if (irq_status)
+ *irq_status = msg.data.resp.status;
+
+ return 0;
+}
+EXPORT_SYMBOL(imx_scu_irq_get_status);
+
int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable)
{
struct imx_sc_msg_irq_enable msg;
diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
index 914dce1..20a16a7 100644
--- a/include/linux/firmware/imx/sci.h
+++ b/include/linux/firmware/imx/sci.h
@@ -17,9 +17,13 @@
#include <linux/firmware/imx/svc/rm.h>
#include <linux/firmware/imx/svc/seco.h>

+#define IMX_SC_IRQ_GROUP_WAKE 3U /* Wakeup interrupts */
+#define IMX_SC_IRQ_SECVIO BIT(6) /* Security violation */
+
int imx_scu_enable_general_irq_channel(struct device *dev);
int imx_scu_irq_register_notifier(struct notifier_block *nb);
int imx_scu_irq_unregister_notifier(struct notifier_block *nb);
int imx_scu_irq_group_enable(u8 group, u32 mask, u8 enable);
int imx_scu_soc_init(struct device *dev);
+int imx_scu_irq_get_status(u8 group, u32 *irq_status);
#endif /* _SC_SCI_H */
--
2.7.4