firmware: imx: add misc svc support

Add SCU MISC SVC support which provides misc control get/set functions.

Cc: Shawn Guo <shawnguo@kernel.org>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

4 files changed, 156 insertions, 1 deletions

diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile
index 9b1e2febb1aa..0ac04dfda8d4 100644
--- a/drivers/firmware/imx/Makefile
+++ b/drivers/firmware/imx/Makefile
@@ -1,2 +1,2 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_IMX_SCU)   += imx-scu.o
+obj-$(CONFIG_IMX_SCU)   += imx-scu.o misc.o
diff --git a/drivers/firmware/imx/misc.c b/drivers/firmware/imx/misc.c
new file mode 100644
index 000000000000..97f5424dbac9
--- /dev/null
+++ b/drivers/firmware/imx/misc.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ *  Author: Dong Aisheng <aisheng.dong@nxp.com>
+ *
+ * File containing client-side RPC functions for the MISC service. These
+ * function are ported to clients that communicate to the SC.
+ *
+ */
+
+#include <linux/firmware/imx/svc/misc.h>
+
+struct imx_sc_msg_req_misc_set_ctrl {
+        struct imx_sc_rpc_msg hdr;
+        u32 ctrl;
+        u32 val;
+        u16 resource;
+} __packed;
+
+struct imx_sc_msg_req_misc_get_ctrl {
+        struct imx_sc_rpc_msg hdr;
+        u32 ctrl;
+        u16 resource;
+} __packed;
+
+struct imx_sc_msg_resp_misc_get_ctrl {
+        struct imx_sc_rpc_msg hdr;
+        u32 val;
+} __packed;
+
+/*
+ * This function sets a miscellaneous control value.
+ *
+ * @param[in]     ipc         IPC handle
+ * @param[in]     resource    resource the control is associated with
+ * @param[in]     ctrl        control to change
+ * @param[in]     val         value to apply to the control
+ *
+ * @return Returns 0 for success and < 0 for errors.
+ */
+
+int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
+                            u8 ctrl, u32 val)
+{
+        struct imx_sc_msg_req_misc_set_ctrl msg;
+        struct imx_sc_rpc_msg *hdr = &msg.hdr;
+
+        hdr->ver = IMX_SC_RPC_VERSION;
+        hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
+        hdr->func = (uint8_t)IMX_SC_MISC_FUNC_SET_CONTROL;
+        hdr->size = 4;
+
+        msg.ctrl = ctrl;
+        msg.val = val;
+        msg.resource = resource;
+
+        return imx_scu_call_rpc(ipc, &msg, true);
+}
+EXPORT_SYMBOL(imx_sc_misc_set_control);
+
+/*
+ * This function gets a miscellaneous control value.
+ *
+ * @param[in]     ipc         IPC handle
+ * @param[in]     resource    resource the control is associated with
+ * @param[in]     ctrl        control to get
+ * @param[out]    val         pointer to return the control value
+ *
+ * @return Returns 0 for success and < 0 for errors.
+ */
+
+int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
+                            u8 ctrl, u32 *val)
+{
+        struct imx_sc_msg_req_misc_get_ctrl msg;
+        struct imx_sc_msg_resp_misc_get_ctrl *resp;
+        struct imx_sc_rpc_msg *hdr = &msg.hdr;
+        int ret;
+
+        hdr->ver = IMX_SC_RPC_VERSION;
+        hdr->svc = (uint8_t)IMX_SC_RPC_SVC_MISC;
+        hdr->func = (uint8_t)IMX_SC_MISC_FUNC_GET_CONTROL;
+        hdr->size = 3;
+
+        msg.ctrl = ctrl;
+        msg.resource = resource;
+
+        ret = imx_scu_call_rpc(ipc, &msg, true);
+        if (ret)
+                return ret;
+
+        resp = (struct imx_sc_msg_resp_misc_get_ctrl *)&msg;
+        if (val != NULL)
+                *val = resp->val;
+
+        return 0;
+}
+EXPORT_SYMBOL(imx_sc_misc_get_control);
diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
index ff3227ad8d7c..29ada609de03 100644
--- a/include/linux/firmware/imx/sci.h
+++ b/include/linux/firmware/imx/sci.h
@@ -13,4 +13,5 @@
 #include <linux/firmware/imx/ipc.h>
 #include <linux/firmware/imx/types.h>
 
+#include <linux/firmware/imx/svc/misc.h>
 #endif /* _SC_SCI_H */
diff --git a/include/linux/firmware/imx/svc/misc.h b/include/linux/firmware/imx/svc/misc.h
new file mode 100644
index 000000000000..e21c49aba92f
--- /dev/null
+++ b/include/linux/firmware/imx/svc/misc.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ *
+ * Header file containing the public API for the System Controller (SC)
+ * Miscellaneous (MISC) function.
+ *
+ * MISC_SVC (SVC) Miscellaneous Service
+ *
+ * Module for the Miscellaneous (MISC) service.
+ */
+
+#ifndef _SC_MISC_API_H
+#define _SC_MISC_API_H
+
+#include <linux/firmware/imx/sci.h>
+
+/*
+ * This type is used to indicate RPC MISC function calls.
+ */
+enum imx_misc_func {
+        IMX_SC_MISC_FUNC_UNKNOWN = 0,
+        IMX_SC_MISC_FUNC_SET_CONTROL = 1,
+        IMX_SC_MISC_FUNC_GET_CONTROL = 2,
+        IMX_SC_MISC_FUNC_SET_MAX_DMA_GROUP = 4,
+        IMX_SC_MISC_FUNC_SET_DMA_GROUP = 5,
+        IMX_SC_MISC_FUNC_SECO_IMAGE_LOAD = 8,
+        IMX_SC_MISC_FUNC_SECO_AUTHENTICATE = 9,
+        IMX_SC_MISC_FUNC_DEBUG_OUT = 10,
+        IMX_SC_MISC_FUNC_WAVEFORM_CAPTURE = 6,
+        IMX_SC_MISC_FUNC_BUILD_INFO = 15,
+        IMX_SC_MISC_FUNC_UNIQUE_ID = 19,
+        IMX_SC_MISC_FUNC_SET_ARI = 3,
+        IMX_SC_MISC_FUNC_BOOT_STATUS = 7,
+        IMX_SC_MISC_FUNC_BOOT_DONE = 14,
+        IMX_SC_MISC_FUNC_OTP_FUSE_READ = 11,
+        IMX_SC_MISC_FUNC_OTP_FUSE_WRITE = 17,
+        IMX_SC_MISC_FUNC_SET_TEMP = 12,
+        IMX_SC_MISC_FUNC_GET_TEMP = 13,
+        IMX_SC_MISC_FUNC_GET_BOOT_DEV = 16,
+        IMX_SC_MISC_FUNC_GET_BUTTON_STATUS = 18,
+};
+
+/*
+ * Control Functions
+ */
+
+int imx_sc_misc_set_control(struct imx_sc_ipc *ipc, u32 resource,
+                            u8 ctrl, u32 val);
+
+int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
+                            u8 ctrl, u32 *val);
+
+#endif /* _SC_MISC_API_H */