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authorKumar Gala <galak@gate.crashing.org>2006-01-13 11:19:13 -0600
committerPaul Mackerras <paulus@samba.org>2006-01-14 11:13:22 +1100
commiteed320010872a11f5255b3d076e5b4f142af553d (patch)
tree68653741ed32150a7402f43c6a1adabeb8915f20 /arch/powerpc/sysdev
parentb8e383d592daaa35c944a9083ee92c995dce66ca (diff)
downloadlinux-linaro-stable-eed320010872a11f5255b3d076e5b4f142af553d.tar.gz
[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>
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/Makefile1
-rw-r--r--arch/powerpc/sysdev/fsl_soc.c317
-rw-r--r--arch/powerpc/sysdev/fsl_soc.h8
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