[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