1 files changed, 433 insertions, 0 deletions

diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
new file mode 100644
index 000000000..06012e68b
--- /dev/null
+++ b/arch/sparc/kernel/of_device_32.c
@@ -0,0 +1,433 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <asm/leon.h>
+#include <asm/leon_amba.h>
+
+#include "of_device_common.h"
+#include "irq.h"
+
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+	if (of_node_is_type(np, "pci") || of_node_is_type(np, "pciex")) {
+		/* Do not do PCI specific frobbing if the
+		 * PCI bridge lacks a ranges property.  We
+		 * want to pass it through up to the next
+		 * parent as-is, not with the PCI translate
+		 * method which chops off the top address cell.
+		 */
+		if (!of_property_present(np, "ranges"))
+			return 0;
+
+		return 1;
+	}
+
+	return 0;
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+				   int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 3;
+	if (sizec)
+		*sizec = 2;
+}
+
+static int of_bus_pci_map(u32 *addr, const u32 *range,
+			  int na, int ns, int pna)
+{
+	u32 result[OF_MAX_ADDR_CELLS];
+	int i;
+
+	/* Check address type match */
+	if ((addr[0] ^ range[0]) & 0x03000000)
+		return -EINVAL;
+
+	if (of_out_of_range(addr + 1, range + 1, range + na + pna,
+			    na - 1, ns))
+		return -EINVAL;
+
+	/* Start with the parent range base.  */
+	memcpy(result, range + na, pna * 4);
+
+	/* Add in the child address offset, skipping high cell.  */
+	for (i = 0; i < na - 1; i++)
+		result[pna - 1 - i] +=
+			(addr[na - 1 - i] -
+			 range[na - 1 - i]);
+
+	memcpy(addr, result, pna * 4);
+
+	return 0;
+}
+
+static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
+{
+	u32 w = addr[0];
+
+	/* For PCI, we override whatever child busses may have used.  */
+	flags = 0;
+	switch((w >> 24) & 0x03) {
+	case 0x01:
+		flags |= IORESOURCE_IO;
+		break;
+
+	case 0x02: /* 32 bits */
+	case 0x03: /* 64 bits */
+		flags |= IORESOURCE_MEM;
+		break;
+	}
+	if (w & 0x40000000)
+		flags |= IORESOURCE_PREFETCH;
+	return flags;
+}
+
+static unsigned long of_bus_sbus_get_flags(const u32 *addr, unsigned long flags)
+{
+	return IORESOURCE_MEM;
+}
+
+ /*
+ * AMBAPP bus specific translator
+ */
+
+static int of_bus_ambapp_match(struct device_node *np)
+{
+	return of_node_is_type(np, "ambapp");
+}
+
+static void of_bus_ambapp_count_cells(struct device_node *child,
+				      int *addrc, int *sizec)
+{
+	if (addrc)
+		*addrc = 1;
+	if (sizec)
+		*sizec = 1;
+}
+
+static int of_bus_ambapp_map(u32 *addr, const u32 *range,
+			     int na, int ns, int pna)
+{
+	return of_bus_default_map(addr, range, na, ns, pna);
+}
+
+static unsigned long of_bus_ambapp_get_flags(const u32 *addr,
+					     unsigned long flags)
+{
+	return IORESOURCE_MEM;
+}
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+	/* PCI */
+	{
+		.name = "pci",
+		.addr_prop_name = "assigned-addresses",
+		.match = of_bus_pci_match,
+		.count_cells = of_bus_pci_count_cells,
+		.map = of_bus_pci_map,
+		.get_flags = of_bus_pci_get_flags,
+	},
+	/* SBUS */
+	{
+		.name = "sbus",
+		.addr_prop_name = "reg",
+		.match = of_bus_sbus_match,
+		.count_cells = of_bus_sbus_count_cells,
+		.map = of_bus_default_map,
+		.get_flags = of_bus_sbus_get_flags,
+	},
+	/* AMBA */
+	{
+		.name = "ambapp",
+		.addr_prop_name = "reg",
+		.match = of_bus_ambapp_match,
+		.count_cells = of_bus_ambapp_count_cells,
+		.map = of_bus_ambapp_map,
+		.get_flags = of_bus_ambapp_get_flags,
+	},
+	/* Default */
+	{
+		.name = "default",
+		.addr_prop_name = "reg",
+		.match = NULL,
+		.count_cells = of_bus_default_count_cells,
+		.map = of_bus_default_map,
+		.get_flags = of_bus_default_get_flags,
+	},
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
+		if (!of_busses[i].match || of_busses[i].match(np))
+			return &of_busses[i];
+	BUG();
+	return NULL;
+}
+
+static int __init build_one_resource(struct device_node *parent,
+				     struct of_bus *bus,
+				     struct of_bus *pbus,
+				     u32 *addr,
+				     int na, int ns, int pna)
+{
+	const u32 *ranges;
+	unsigned int rlen;
+	int rone;
+
+	ranges = of_get_property(parent, "ranges", &rlen);
+	if (ranges == NULL || rlen == 0) {
+		u32 result[OF_MAX_ADDR_CELLS];
+		int i;
+
+		memset(result, 0, pna * 4);
+		for (i = 0; i < na; i++)
+			result[pna - 1 - i] =
+				addr[na - 1 - i];
+
+		memcpy(addr, result, pna * 4);
+		return 0;
+	}
+
+	/* Now walk through the ranges */
+	rlen /= 4;
+	rone = na + pna + ns;
+	for (; rlen >= rone; rlen -= rone, ranges += rone) {
+		if (!bus->map(addr, ranges, na, ns, pna))
+			return 0;
+	}
+
+	return 1;
+}
+
+static int __init use_1to1_mapping(struct device_node *pp)
+{
+	/* If we have a ranges property in the parent, use it.  */
+	if (of_property_present(pp, "ranges"))
+		return 0;
+
+	/* Some SBUS devices use intermediate nodes to express
+	 * hierarchy within the device itself.  These aren't
+	 * real bus nodes, and don't have a 'ranges' property.
+	 * But, we should still pass the translation work up
+	 * to the SBUS itself.
+	 */
+	if (of_node_name_eq(pp, "dma") ||
+	    of_node_name_eq(pp, "espdma") ||
+	    of_node_name_eq(pp, "ledma") ||
+	    of_node_name_eq(pp, "lebuffer"))
+		return 0;
+
+	return 1;
+}
+
+static int of_resource_verbose;
+
+static void __init build_device_resources(struct platform_device *op,
+					  struct device *parent)
+{
+	struct platform_device *p_op;
+	struct of_bus *bus;
+	int na, ns;
+	int index, num_reg;
+	const void *preg;
+
+	if (!parent)
+		return;
+
+	p_op = to_platform_device(parent);
+	bus = of_match_bus(p_op->dev.of_node);
+	bus->count_cells(op->dev.of_node, &na, &ns);
+
+	preg = of_get_property(op->dev.of_node, bus->addr_prop_name, &num_reg);
+	if (!preg || num_reg == 0)
+		return;
+
+	/* Convert to num-cells.  */
+	num_reg /= 4;
+
+	/* Conver to num-entries.  */
+	num_reg /= na + ns;
+
+	op->resource = op->archdata.resource;
+	op->num_resources = num_reg;
+	for (index = 0; index < num_reg; index++) {
+		struct resource *r = &op->resource[index];
+		u32 addr[OF_MAX_ADDR_CELLS];
+		const u32 *reg = (preg + (index * ((na + ns) * 4)));
+		struct device_node *dp = op->dev.of_node;
+		struct device_node *pp = p_op->dev.of_node;
+		struct of_bus *pbus, *dbus;
+		u64 size, result = OF_BAD_ADDR;
+		unsigned long flags;
+		int dna, dns;
+		int pna, pns;
+
+		size = of_read_addr(reg + na, ns);
+
+		memcpy(addr, reg, na * 4);
+
+		flags = bus->get_flags(reg, 0);
+
+		if (use_1to1_mapping(pp)) {
+			result = of_read_addr(addr, na);
+			goto build_res;
+		}
+
+		dna = na;
+		dns = ns;
+		dbus = bus;
+
+		while (1) {
+			dp = pp;
+			pp = dp->parent;
+			if (!pp) {
+				result = of_read_addr(addr, dna);
+				break;
+			}
+
+			pbus = of_match_bus(pp);
+			pbus->count_cells(dp, &pna, &pns);
+
+			if (build_one_resource(dp, dbus, pbus, addr,
+					       dna, dns, pna))
+				break;
+
+			flags = pbus->get_flags(addr, flags);
+
+			dna = pna;
+			dns = pns;
+			dbus = pbus;
+		}
+
+	build_res:
+		memset(r, 0, sizeof(*r));
+
+		if (of_resource_verbose)
+			printk("%pOF reg[%d] -> %llx\n",
+			       op->dev.of_node, index,
+			       result);
+
+		if (result != OF_BAD_ADDR) {
+			r->start = result & 0xffffffff;
+			r->end = result + size - 1;
+			r->flags = flags | ((result >> 32ULL) & 0xffUL);
+		}
+		r->name = op->dev.of_node->full_name;
+	}
+}
+
+static struct platform_device * __init scan_one_device(struct device_node *dp,
+						 struct device *parent)
+{
+	struct platform_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
+	const struct linux_prom_irqs *intr;
+	struct dev_archdata *sd;
+	int len, i;
+
+	if (!op)
+		return NULL;
+
+	sd = &op->dev.archdata;
+	sd->op = op;
+
+	op->dev.of_node = dp;
+
+	intr = of_get_property(dp, "intr", &len);
+	if (intr) {
+		op->archdata.num_irqs = len / sizeof(struct linux_prom_irqs);
+		for (i = 0; i < op->archdata.num_irqs; i++)
+			op->archdata.irqs[i] =
+			    sparc_config.build_device_irq(op, intr[i].pri);
+	} else {
+		const unsigned int *irq =
+			of_get_property(dp, "interrupts", &len);
+
+		if (irq) {
+			op->archdata.num_irqs = len / sizeof(unsigned int);
+			for (i = 0; i < op->archdata.num_irqs; i++)
+				op->archdata.irqs[i] =
+				    sparc_config.build_device_irq(op, irq[i]);
+		} else {
+			op->archdata.num_irqs = 0;
+		}
+	}
+
+	build_device_resources(op, parent);
+
+	op->dev.parent = parent;
+	op->dev.bus = &platform_bus_type;
+	if (!parent)
+		dev_set_name(&op->dev, "root");
+	else
+		dev_set_name(&op->dev, "%08x", dp->phandle);
+
+	op->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+	op->dev.dma_mask = &op->dev.coherent_dma_mask;
+
+	if (of_device_register(op)) {
+		printk("%pOF: Could not register of device.\n", dp);
+		kfree(op);
+		op = NULL;
+	}
+
+	return op;
+}
+
+static void __init scan_tree(struct device_node *dp, struct device *parent)
+{
+	while (dp) {
+		struct platform_device *op = scan_one_device(dp, parent);
+
+		if (op)
+			scan_tree(dp->child, &op->dev);
+
+		dp = dp->sibling;
+	}
+}
+
+static int __init scan_of_devices(void)
+{
+	struct device_node *root = of_find_node_by_path("/");
+	struct platform_device *parent;
+
+	parent = scan_one_device(root, NULL);
+	if (!parent)
+		return 0;
+
+	scan_tree(root->child, &parent->dev);
+	return 0;
+}
+postcore_initcall(scan_of_devices);
+
+static int __init of_debug(char *str)
+{
+	int val = 0;
+
+	get_option(&str, &val);
+	if (val & 1)
+		of_resource_verbose = 1;
+	return 1;
+}
+
+__setup("of_debug=", of_debug);