Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit eed32001 authored by Kumar Gala's avatar Kumar Gala Committed by Paul Mackerras
Browse files

[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: default avatarKumar Gala <galak@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent b8e383d5

arch/powerpc/sysdev/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/powerpc/sysdev/fsl_soc.c

0 → 100644
+317 −0
Original line number Diff line number Diff line 
/*

 * 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

arch/powerpc/sysdev/fsl_soc.h

0 → 100644
+8 −0
Original line number Diff line number Diff line 
#ifndef __PPC_FSL_SOC_H

#define __PPC_FSL_SOC_H

#ifdef __KERNEL__



extern phys_addr_t get_immrbase(void);



#endif

#endif