From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Thu, 11 Apr 2024 10:27:49 +0200
Subject: Adding upstream version 6.6.15.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/powerpc/sysdev/fsl_soc.c | 217 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 217 insertions(+)
 create mode 100644 arch/powerpc/sysdev/fsl_soc.c

(limited to 'arch/powerpc/sysdev/fsl_soc.c')

diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
new file mode 100644
index 0000000000..3949ceb79e
--- /dev/null
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * FSL SoC setup code
+ *
+ * Maintained by Kumar Gala (see MAINTAINERS for contact information)
+ *
+ * 2006 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/major.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/export.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/spi/spi.h>
+#include <linux/fsl_devices.h>
+#include <linux/reboot.h>
+
+#include <linux/atomic.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/time.h>
+#include <asm/machdep.h>
+#include <sysdev/fsl_soc.h>
+#include <mm/mmu_decl.h>
+#include <asm/cpm2.h>
+#include <asm/fsl_hcalls.h>	/* For the Freescale hypervisor */
+
+static phys_addr_t immrbase = -1;
+
+phys_addr_t get_immrbase(void)
+{
+	struct device_node *soc;
+
+	if (immrbase != -1)
+		return immrbase;
+
+	soc = of_find_node_by_type(NULL, "soc");
+	if (soc) {
+		struct resource res;
+
+		if (!of_range_to_resource(soc, 0, &res))
+			immrbase = res.start;
+
+		of_node_put(soc);
+	}
+
+	return immrbase;
+}
+
+EXPORT_SYMBOL(get_immrbase);
+
+u32 fsl_get_sys_freq(void)
+{
+	static u32 sysfreq = -1;
+	struct device_node *soc;
+
+	if (sysfreq != -1)
+		return sysfreq;
+
+	soc = of_find_node_by_type(NULL, "soc");
+	if (!soc)
+		return -1;
+
+	of_property_read_u32(soc, "clock-frequency", &sysfreq);
+	if (sysfreq == -1 || !sysfreq)
+		of_property_read_u32(soc, "bus-frequency", &sysfreq);
+
+	of_node_put(soc);
+	return sysfreq;
+}
+EXPORT_SYMBOL(fsl_get_sys_freq);
+
+#if defined(CONFIG_CPM) || defined(CONFIG_QUICC_ENGINE)
+
+u32 get_brgfreq(void)
+{
+	static u32 brgfreq = -1;
+	struct device_node *node;
+
+	if (brgfreq != -1)
+		return brgfreq;
+
+	node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
+	if (node) {
+		of_property_read_u32(node, "clock-frequency", &brgfreq);
+		of_node_put(node);
+		return brgfreq;
+	}
+
+	/* Legacy device binding -- will go away when no users are left. */
+	node = of_find_node_by_type(NULL, "cpm");
+	if (!node)
+		node = of_find_compatible_node(NULL, NULL, "fsl,qe");
+	if (!node)
+		node = of_find_node_by_type(NULL, "qe");
+
+	if (node) {
+		of_property_read_u32(node, "brg-frequency", &brgfreq);
+		if (brgfreq == -1 || !brgfreq)
+			if (!of_property_read_u32(node, "bus-frequency",
+						  &brgfreq))
+				brgfreq /= 2;
+		of_node_put(node);
+	}
+
+	return brgfreq;
+}
+
+EXPORT_SYMBOL(get_brgfreq);
+
+u32 get_baudrate(void)
+{
+	static u32 fs_baudrate = -1;
+	struct device_node *node;
+
+	if (fs_baudrate != -1)
+		return fs_baudrate;
+
+	node = of_find_node_by_type(NULL, "serial");
+	if (node) {
+		of_property_read_u32(node, "current-speed", &fs_baudrate);
+		of_node_put(node);
+	}
+
+	return fs_baudrate;
+}
+
+EXPORT_SYMBOL(get_baudrate);
+#endif /* CONFIG_CPM2 */
+
+#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
+static __be32 __iomem *rstcr;
+
+static int fsl_rstcr_restart(struct notifier_block *this,
+			     unsigned long mode, void *cmd)
+{
+	local_irq_disable();
+	/* set reset control register */
+	out_be32(rstcr, 0x2);	/* HRESET_REQ */
+
+	return NOTIFY_DONE;
+}
+
+static int __init setup_rstcr(void)
+{
+	struct device_node *np;
+
+	static struct notifier_block restart_handler = {
+		.notifier_call = fsl_rstcr_restart,
+		.priority = 128,
+	};
+
+	for_each_node_by_name(np, "global-utilities") {
+		if (of_property_read_bool(np, "fsl,has-rstcr")) {
+			rstcr = of_iomap(np, 0) + 0xb0;
+			if (!rstcr) {
+				printk (KERN_ERR "Error: reset control "
+						"register not mapped!\n");
+			} else {
+				register_restart_handler(&restart_handler);
+			}
+			break;
+		}
+	}
+
+	of_node_put(np);
+
+	return 0;
+}
+
+arch_initcall(setup_rstcr);
+
+#endif
+
+#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
+struct platform_diu_data_ops diu_ops;
+EXPORT_SYMBOL(diu_ops);
+#endif
+
+#ifdef CONFIG_EPAPR_PARAVIRT
+/*
+ * Restart the current partition
+ *
+ * This function should be assigned to the ppc_md.restart function pointer,
+ * to initiate a partition restart when we're running under the Freescale
+ * hypervisor.
+ */
+void __noreturn fsl_hv_restart(char *cmd)
+{
+	pr_info("hv restart\n");
+	fh_partition_restart(-1);
+	while (1) ;
+}
+
+/*
+ * Halt the current partition
+ *
+ * This function should be assigned to the pm_power_off and ppc_md.halt
+ * function pointers, to shut down the partition when we're running under
+ * the Freescale hypervisor.
+ */
+void __noreturn fsl_hv_halt(void)
+{
+	pr_info("hv exit\n");
+	fh_partition_stop(-1);
+	while (1) ;
+}
+#endif
-- 
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