i.mx8qm/i.mx8qxp: add SIP cpu-freq support

Linux kernel will issue cpu-freq scale via SIP, ATF
calls SCFW API to finish the CPU frequency scale.

Move SIP service code from i.mx8mq to common place for
all i.mx SoCs.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>

3 files changed, 173 insertions, 0 deletions

diff --git a/plat/freescale/common/cpufreq.c b/plat/freescale/common/cpufreq.c
new file mode 100644
index 00000000..75f005dd
--- /dev/null
+++ b/plat/freescale/common/cpufreq.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <debug.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <smcc_helpers.h>
+#include <std_svc.h>
+#include <types.h>
+#include <platform_def.h>
+#include <fsl_sip.h>
+#include <sci/sci.h>
+
+extern sc_ipc_t ipc_handle;
+
+const static int ap_cluster_index[2] = {
+	SC_R_A53, SC_R_A72,
+};
+
+static void imx_cpufreq_set_target(uint32_t cluster_id, unsigned long freq)
+{
+	sc_pm_clock_rate_t rate = (sc_pm_clock_rate_t)freq;
+
+#ifdef PLAT_IMX8QM
+	sc_pm_set_clock_rate(ipc_handle, ap_cluster_index[cluster_id], SC_PM_CLK_CPU, &rate);
+#endif
+#ifdef PLAT_IMX8QXP
+	sc_pm_set_clock_rate(ipc_handle, SC_R_A35, SC_PM_CLK_CPU, &rate);
+#endif
+}
+
+int imx_cpufreq_handler(uint32_t smc_fid,
+		    u_register_t x1,
+		    u_register_t x2,
+		    u_register_t x3)
+{
+	switch(x1) {
+	case FSL_SIP_SET_CPUFREQ:
+		imx_cpufreq_set_target(x2, x3);
+		break;
+	default:
+		return SMC_UNK;
+	}
+
+	return 0;
+}
diff --git a/plat/freescale/common/include/fsl_sip.h b/plat/freescale/common/include/fsl_sip.h
new file mode 100644
index 00000000..52dceb81
--- /dev/null
+++ b/plat/freescale/common/include/fsl_sip.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2017 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __SOC_FSL_SIP_H
+#define __SOC_FSL_SIP_H
+
+#define FSL_SIP_GPC			0xC2000000
+#define FSL_SIP_CONFIG_GPC_MASK		0x00
+#define FSL_SIP_CONFIG_GPC_UNMASK	0x01
+#define FSL_SIP_CONFIG_GPC_SET_WAKE	0x02
+#define FSL_SIP_CONFIG_GPC_PM_DOMAIN	0x03
+
+#define FSL_SIP_CPUFREQ			0xC2000001
+#define FSL_SIP_SET_CPUFREQ		0x00
+
+
+#endif
diff --git a/plat/freescale/common/sip_svc.c b/plat/freescale/common/sip_svc.c
new file mode 100644
index 00000000..d8c1c5bf
--- /dev/null
+++ b/plat/freescale/common/sip_svc.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright 2017 NXP
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of ARM nor the names of its contributors may be used
+ * to endorse or promote products derived from this software without specific
+ * prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <debug.h>
+#include <fsl_sip.h>
+#include <runtime_svc.h>
+#include <smcc_helpers.h>
+#include <std_svc.h>
+#include <stdint.h>
+#include <uuid.h>
+
+extern int imx_gpc_handler(uint32_t  smc_fid, u_register_t x1, u_register_t x2, u_register_t x3);
+extern int imx_cpufreq_handler(uint32_t  smc_fid, u_register_t x1, u_register_t x2, u_register_t x3);
+
+/* Setup i.MX platform specific services Services */
+static int32_t plat_svc_setup(void)
+{
+	/* gpc init ?*/
+	NOTICE("sip svc init\n");
+	return 0;
+}
+
+/* i.MX platform specific service SMC handler */
+uintptr_t imx_svc_smc_handler(uint32_t smc_fid,
+			      u_register_t x1,
+			      u_register_t x2,
+			      u_register_t x3,
+			      u_register_t x4,
+			      void *cookie,
+			      void *handle,
+			      uint64_t flags)
+{
+	NOTICE("smc_fid is %x\n", smc_fid);
+	switch (smc_fid) {
+#ifdef PLAT_IMX8M
+	case  FSL_SIP_GPC:
+		SMC_RET1(handle, imx_gpc_handler(smc_fid, x1, x2, x3));
+		break;
+#endif
+#if (defined(PLAT_IMX8QM) || defined(PLAT_IMX8QXP))
+	case  FSL_SIP_CPUFREQ:
+		SMC_RET1(handle, imx_cpufreq_handler(smc_fid, x1, x2, x3));
+		break;
+#endif
+	default:
+		WARN("Unimplemented SIP Service Call: 0x%x \n", smc_fid);
+		SMC_RET1(handle, SMC_UNK);
+		break;
+	}
+}
+
+/* Rigister SIP Service Calls as runtime service */
+DECLARE_RT_SVC(
+		imx_svc,
+		OEN_SIP_START,
+		OEN_SIP_END,
+		SMC_TYPE_FAST,
+		plat_svc_setup,
+		imx_svc_smc_handler
+);