[PATCH] powerpc: Add FSL SOC library and setup code

Parse the flat device tree for devices on Freescale SOC's that we know
about (gianfar, gianfar_mdio, i2c, mpc83xx_wdt).  We need to setup
platform devices and platform data for these devices to match arch/ppc
usage.

Also add a helper function (get_immrbase) that reports the base
address of the MMIO registers on the SOC.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 326 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 0ae841347a09..4c2b356774ea 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_40x)		+= dcr.o
 obj-$(CONFIG_U3_DART)		+= dart_iommu.o
 obj-$(CONFIG_MMIO_NVRAM)	+= mmio_nvram.o
 obj-$(CONFIG_PPC_83xx)		+= ipic.o
+obj-$(CONFIG_FSL_SOC)		+= fsl_soc.o
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
new file mode 100644
index 000000000000..064c9de47732
--- /dev/null
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -0,0 +1,317 @@
+/*
+ * FSL SoC setup code
+ *
+ * Maintained by Kumar Gala (see MAINTAINERS for contact information)
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#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/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+
+#include <asm/system.h>
+#include <asm/atomic.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/prom.h>
+#include <sysdev/fsl_soc.h>
+#include <mm/mmu_decl.h>
+
+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 != 0) {
+		unsigned int size;
+		void *prop = get_property(soc, "reg", &size);
+		immrbase = of_translate_address(soc, prop);
+		of_node_put(soc);
+	};
+
+	return immrbase;
+}
+EXPORT_SYMBOL(get_immrbase);
+
+static const char * gfar_tx_intr = "tx";
+static const char * gfar_rx_intr = "rx";
+static const char * gfar_err_intr = "error";
+
+static int __init gfar_of_init(void)
+{
+	struct device_node *np;
+	unsigned int i;
+	struct platform_device *mdio_dev, *gfar_dev;
+	struct resource res;
+	int ret;
+
+	for (np = NULL, i = 0; (np = of_find_compatible_node(np, "mdio", "gianfar")) != NULL; i++) {
+		int k;
+		struct device_node *child = NULL;
+		struct gianfar_mdio_data mdio_data;
+
+		memset(&res, 0, sizeof(res));
+		memset(&mdio_data, 0, sizeof(mdio_data));
+
+		ret = of_address_to_resource(np, 0, &res);
+		if (ret)
+			goto mdio_err;
+
+		mdio_dev = platform_device_register_simple("fsl-gianfar_mdio", res.start, &res, 1);
+		if (IS_ERR(mdio_dev)) {
+			ret = PTR_ERR(mdio_dev);
+			goto mdio_err;
+		}
+
+		for (k = 0; k < 32; k++)
+			mdio_data.irq[k] = -1;
+
+		while ((child = of_get_next_child(np, child)) != NULL) {
+			if (child->n_intrs) {
+				u32 *id = (u32 *) get_property(child, "reg", NULL);
+				mdio_data.irq[*id] = child->intrs[0].line;
+			}
+		}
+
+		ret = platform_device_add_data(mdio_dev, &mdio_data, sizeof(struct gianfar_mdio_data));
+		if (ret)
+			goto mdio_unreg;
+	}
+
+	for (np = NULL, i = 0; (np = of_find_compatible_node(np, "network", "gianfar")) != NULL; i++) {
+		struct resource r[4];
+		struct device_node *phy, *mdio;
+		struct gianfar_platform_data gfar_data;
+		unsigned int *id;
+		char *model;
+		void *mac_addr;
+		phandle *ph;
+
+		memset(r, 0, sizeof(r));
+		memset(&gfar_data, 0, sizeof(gfar_data));
+
+		ret = of_address_to_resource(np, 0, &r[0]);
+		if (ret)
+			goto gfar_err;
+
+		r[1].start = np->intrs[0].line;
+		r[1].end = np->intrs[0].line;
+		r[1].flags = IORESOURCE_IRQ;
+
+		model = get_property(np, "model", NULL);
+
+		/* If we aren't the FEC we have multiple interrupts */
+		if (model && strcasecmp(model, "FEC")) {
+			r[1].name = gfar_tx_intr;
+
+			r[2].name = gfar_rx_intr;
+			r[2].start = np->intrs[1].line;
+			r[2].end = np->intrs[1].line;
+			r[2].flags = IORESOURCE_IRQ;
+
+			r[3].name = gfar_err_intr;
+			r[3].start = np->intrs[2].line;
+			r[3].end = np->intrs[2].line;
+			r[3].flags = IORESOURCE_IRQ;
+		}
+
+		gfar_dev = platform_device_register_simple("fsl-gianfar", i, &r[0], np->n_intrs + 1);
+
+		if (IS_ERR(gfar_dev)) {
+			ret = PTR_ERR(gfar_dev);
+			goto gfar_err;
+		}
+
+		mac_addr = get_property(np, "address", NULL);
+		memcpy(gfar_data.mac_addr, mac_addr, 6);
+
+		if (model && !strcasecmp(model, "TSEC"))
+			gfar_data.device_flags =
+				FSL_GIANFAR_DEV_HAS_GIGABIT |
+				FSL_GIANFAR_DEV_HAS_COALESCE |
+				FSL_GIANFAR_DEV_HAS_RMON |
+				FSL_GIANFAR_DEV_HAS_MULTI_INTR;
+		if (model && !strcasecmp(model, "eTSEC"))
+			gfar_data.device_flags =
+				FSL_GIANFAR_DEV_HAS_GIGABIT |
+				FSL_GIANFAR_DEV_HAS_COALESCE |
+				FSL_GIANFAR_DEV_HAS_RMON |
+				FSL_GIANFAR_DEV_HAS_MULTI_INTR |
+				FSL_GIANFAR_DEV_HAS_CSUM |
+				FSL_GIANFAR_DEV_HAS_VLAN |
+				FSL_GIANFAR_DEV_HAS_EXTENDED_HASH;
+
+		ph = (phandle *) get_property(np, "phy-handle", NULL);
+		phy = of_find_node_by_phandle(*ph);
+
+		if (phy == NULL) {
+			ret = -ENODEV;
+			goto gfar_unreg;
+		}
+
+		mdio = of_get_parent(phy);
+
+		id = (u32 *) get_property(phy, "reg", NULL);
+		ret = of_address_to_resource(mdio, 0, &res);
+		if (ret) {
+			of_node_put(phy);
+			of_node_put(mdio);
+			goto gfar_unreg;
+		}
+
+		gfar_data.phy_id = *id;
+		gfar_data.bus_id = res.start;
+
+		of_node_put(phy);
+		of_node_put(mdio);
+
+		ret = platform_device_add_data(gfar_dev, &gfar_data, sizeof(struct gianfar_platform_data));
+		if (ret)
+			goto gfar_unreg;
+	}
+
+	return 0;
+
+mdio_unreg:
+	platform_device_unregister(mdio_dev);
+mdio_err:
+	return ret;
+
+gfar_unreg:
+	platform_device_unregister(gfar_dev);
+gfar_err:
+	return ret;
+}
+arch_initcall(gfar_of_init);
+
+static int __init fsl_i2c_of_init(void)
+{
+	struct device_node *np;
+	unsigned int i;
+	struct platform_device *i2c_dev;
+	int ret;
+
+	for (np = NULL, i = 0; (np = of_find_compatible_node(np, "i2c", "fsl-i2c")) != NULL; i++) {
+		struct resource r[2];
+		struct fsl_i2c_platform_data i2c_data;
+		unsigned char * flags = NULL;
+
+		memset(&r, 0, sizeof(r));
+		memset(&i2c_data, 0, sizeof(i2c_data));
+
+		ret = of_address_to_resource(np, 0, &r[0]);
+		if (ret)
+			goto i2c_err;
+
+		r[1].start = np->intrs[0].line;
+		r[1].end = np->intrs[0].line;
+		r[1].flags = IORESOURCE_IRQ;
+
+		i2c_dev = platform_device_register_simple("fsl-i2c", i, r, 2);
+		if (IS_ERR(i2c_dev)) {
+			ret = PTR_ERR(i2c_dev);
+			goto i2c_err;
+		}
+
+		i2c_data.device_flags = 0;
+		flags = get_property(np, "dfsrr", NULL);
+		if (flags)
+			i2c_data.device_flags |= FSL_I2C_DEV_SEPARATE_DFSRR;
+
+		flags = get_property(np, "fsl5200-clocking", NULL);
+		if (flags)
+			i2c_data.device_flags |= FSL_I2C_DEV_CLOCK_5200;
+
+		ret = platform_device_add_data(i2c_dev, &i2c_data, sizeof(struct fsl_i2c_platform_data));
+		if (ret)
+			goto i2c_unreg;
+	}
+
+	return 0;
+
+i2c_unreg:
+	platform_device_unregister(i2c_dev);
+i2c_err:
+	return ret;
+}
+arch_initcall(fsl_i2c_of_init);
+
+#ifdef CONFIG_PPC_83xx
+static int __init mpc83xx_wdt_init(void)
+{
+	struct resource r;
+	struct device_node *soc, *np;
+	struct platform_device *dev;
+	unsigned int *freq;
+	int ret;
+
+	np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
+
+	if (!np) {
+		ret = -ENODEV;
+		goto mpc83xx_wdt_nodev;
+	}
+
+	soc = of_find_node_by_type(NULL, "soc");
+
+	if (!soc) {
+		ret = -ENODEV;
+		goto mpc83xx_wdt_nosoc;
+	}
+
+	freq = (unsigned int *)get_property(soc, "bus-frequency", NULL);
+	if (!freq) {
+		ret = -ENODEV;
+		goto mpc83xx_wdt_err;
+	}
+
+	memset(&r, 0, sizeof(r));
+
+	ret = of_address_to_resource(np, 0, &r);
+	if (ret)
+		goto mpc83xx_wdt_err;
+
+	dev = platform_device_register_simple("mpc83xx_wdt", 0, &r, 1);
+	if (IS_ERR(dev)) {
+		ret = PTR_ERR(dev);
+		goto mpc83xx_wdt_err;
+	}
+
+	ret = platform_device_add_data(dev, freq, sizeof(int));
+	if (ret)
+		goto mpc83xx_wdt_unreg;
+
+	of_node_put(soc);
+	of_node_put(np);
+
+	return 0;
+
+mpc83xx_wdt_unreg:
+	platform_device_unregister(dev);
+mpc83xx_wdt_err:
+	of_node_put(soc);
+mpc83xx_wdt_nosoc:
+	of_node_put(np);
+mpc83xx_wdt_nodev:
+	return ret;
+}
+arch_initcall(mpc83xx_wdt_init);
+#endif
diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h
new file mode 100644
index 000000000000..c433d3f39edd
--- /dev/null
+++ b/arch/powerpc/sysdev/fsl_soc.h
@@ -0,0 +1,8 @@
+#ifndef __PPC_FSL_SOC_H
+#define __PPC_FSL_SOC_H
+#ifdef __KERNEL__
+
+extern phys_addr_t get_immrbase(void);
+
+#endif
+#endif