arch/powerpc/platforms/85xx/mpc85xx_ds.c - maze/linux - Git at Google

 /*
  * MPC85xx DS Board Setup
  *
  * Author Xianghua Xiao (x.xiao@freescale.com)
  * Roy Zang <tie-fei.zang@freescale.com>
  * 	- Add PCI/PCI Exprees support
  * Copyright 2007 Freescale Semiconductor Inc.
  *
  * 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/stddef.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/kdev_t.h>
 #include <linux/delay.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
 #include <linux/of_platform.h>
 #include <linux/memblock.h>

 #include <asm/system.h>
 #include <asm/time.h>
 #include <asm/machdep.h>
 #include <asm/pci-bridge.h>
 #include <mm/mmu_decl.h>
 #include <asm/prom.h>
 #include <asm/udbg.h>
 #include <asm/mpic.h>
 #include <asm/i8259.h>
 #include <asm/swiotlb.h>

 #include <sysdev/fsl_soc.h>
 #include <sysdev/fsl_pci.h>

 #undef DEBUG

 #ifdef DEBUG
 #define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
 #else
 #define DBG(fmt, args...)
 #endif

 #ifdef CONFIG_PPC_I8259
 static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
 {
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 	unsigned int cascade_irq = i8259_irq();

 	if (cascade_irq != NO_IRQ) {
 		generic_handle_irq(cascade_irq);
 	}
 	chip->irq_eoi(&desc->irq_data);
 }
 #endif	/* CONFIG_PPC_I8259 */

 void __init mpc85xx_ds_pic_init(void)
 {
 	struct mpic *mpic;
 	struct resource r;
 	struct device_node *np;
 #ifdef CONFIG_PPC_I8259
 	struct device_node *cascade_node = NULL;
 	int cascade_irq;
 #endif
 	unsigned long root = of_get_flat_dt_root();

 	np = of_find_node_by_type(NULL, "open-pic");
 	if (np == NULL) {
 		printk(KERN_ERR "Could not find open-pic node\n");
 		return;
 	}

 	if (of_address_to_resource(np, 0, &r)) {
 		printk(KERN_ERR "Failed to map mpic register space\n");
 		of_node_put(np);
 		return;
 	}

 	if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
 		mpic = mpic_alloc(np, r.start,
 			MPIC_PRIMARY |
 			MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
 	} else {
 		mpic = mpic_alloc(np, r.start,
 			  MPIC_PRIMARY | MPIC_WANTS_RESET |
 			  MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
 			  MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
 	}

 	BUG_ON(mpic == NULL);
 	of_node_put(np);

 	mpic_init(mpic);

 #ifdef CONFIG_PPC_I8259
 	/* Initialize the i8259 controller */
 	for_each_node_by_type(np, "interrupt-controller")
 	    if (of_device_is_compatible(np, "chrp,iic")) {
 		cascade_node = np;
 		break;
 	}

 	if (cascade_node == NULL) {
 		printk(KERN_DEBUG "Could not find i8259 PIC\n");
 		return;
 	}

 	cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 	if (cascade_irq == NO_IRQ) {
 		printk(KERN_ERR "Failed to map cascade interrupt\n");
 		return;
 	}

 	DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);

 	i8259_init(cascade_node, 0);
 	of_node_put(cascade_node);

 	irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
 #endif	/* CONFIG_PPC_I8259 */
 }

 #ifdef CONFIG_PCI
 static int primary_phb_addr;
 extern int uli_exclude_device(struct pci_controller *hose,
 				u_char bus, u_char devfn);

 static int mpc85xx_exclude_device(struct pci_controller *hose,
 				   u_char bus, u_char devfn)
 {
 	struct device_node* node;
 	struct resource rsrc;

 	node = hose->dn;
 	of_address_to_resource(node, 0, &rsrc);

 	if ((rsrc.start & 0xfffff) == primary_phb_addr) {
 		return uli_exclude_device(hose, bus, devfn);
 	}

 	return PCIBIOS_SUCCESSFUL;
 }
 #endif	/* CONFIG_PCI */

 /*
  * Setup the architecture
  */
 #ifdef CONFIG_SMP
 extern void __init mpc85xx_smp_init(void);
 #endif
 static void __init mpc85xx_ds_setup_arch(void)
 {
 #ifdef CONFIG_PCI
 	struct device_node *np;
 	struct pci_controller *hose;
 #endif
 	dma_addr_t max = 0xffffffff;

 	if (ppc_md.progress)
 		ppc_md.progress("mpc85xx_ds_setup_arch()", 0);

 #ifdef CONFIG_PCI
 	for_each_node_by_type(np, "pci") {
 		if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 		    of_device_is_compatible(np, "fsl,mpc8548-pcie") ||
 		    of_device_is_compatible(np, "fsl,p2020-pcie")) {
 			struct resource rsrc;
 			of_address_to_resource(np, 0, &rsrc);
 			if ((rsrc.start & 0xfffff) == primary_phb_addr)
 				fsl_add_bridge(np, 1);
 			else
 				fsl_add_bridge(np, 0);

 			hose = pci_find_hose_for_OF_device(np);
 			max = min(max, hose->dma_window_base_cur +
 					hose->dma_window_size);
 		}
 	}

 	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 #endif

 #ifdef CONFIG_SMP
 	mpc85xx_smp_init();
 #endif

 #ifdef CONFIG_SWIOTLB
 	if (memblock_end_of_DRAM() > max) {
 		ppc_swiotlb_enable = 1;
 		set_pci_dma_ops(&swiotlb_dma_ops);
 		ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 	}
 #endif

 	printk("MPC85xx DS board from Freescale Semiconductor\n");
 }

 /*
  * Called very early, device-tree isn't unflattened
  */
 static int __init mpc8544_ds_probe(void)
 {
 	unsigned long root = of_get_flat_dt_root();

 	if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
 #ifdef CONFIG_PCI
 		primary_phb_addr = 0xb000;
 #endif
 		return 1;
 	}

 	return 0;
 }

 static struct of_device_id __initdata mpc85xxds_ids[] = {
 	{ .type = "soc", },
 	{ .compatible = "soc", },
 	{ .compatible = "simple-bus", },
 	{ .compatible = "gianfar", },
 	{},
 };

 static int __init mpc85xxds_publish_devices(void)
 {
 	return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
 }
 machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
 machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
 machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);

 machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
 machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
 machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);

 /*
  * Called very early, device-tree isn't unflattened
  */
 static int __init mpc8572_ds_probe(void)
 {
 	unsigned long root = of_get_flat_dt_root();

 	if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
 #ifdef CONFIG_PCI
 		primary_phb_addr = 0x8000;
 #endif
 		return 1;
 	}

 	return 0;
 }

 /*
  * Called very early, device-tree isn't unflattened
  */
 static int __init p2020_ds_probe(void)
 {
 	unsigned long root = of_get_flat_dt_root();

 	if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
 #ifdef CONFIG_PCI
 		primary_phb_addr = 0x9000;
 #endif
 		return 1;
 	}

 	return 0;
 }

 define_machine(mpc8544_ds) {
 	.name			= "MPC8544 DS",
 	.probe			= mpc8544_ds_probe,
 	.setup_arch		= mpc85xx_ds_setup_arch,
 	.init_IRQ		= mpc85xx_ds_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 #endif
 	.get_irq		= mpic_get_irq,
 	.restart		= fsl_rstcr_restart,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
 };

 define_machine(mpc8572_ds) {
 	.name			= "MPC8572 DS",
 	.probe			= mpc8572_ds_probe,
 	.setup_arch		= mpc85xx_ds_setup_arch,
 	.init_IRQ		= mpc85xx_ds_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 #endif
 	.get_irq		= mpic_get_irq,
 	.restart		= fsl_rstcr_restart,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
 };

 define_machine(p2020_ds) {
 	.name			= "P2020 DS",
 	.probe			= p2020_ds_probe,
 	.setup_arch		= mpc85xx_ds_setup_arch,
 	.init_IRQ		= mpc85xx_ds_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 #endif
 	.get_irq		= mpic_get_irq,
 	.restart		= fsl_rstcr_restart,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
 };
	/*
	* MPC85xx DS Board Setup
	*
	* Author Xianghua Xiao (x.xiao@freescale.com)
	* Roy Zang <tie-fei.zang@freescale.com>
	* - Add PCI/PCI Exprees support
	* Copyright 2007 Freescale Semiconductor Inc.
	*
	* 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/stddef.h>
	#include <linux/kernel.h>
	#include <linux/pci.h>
	#include <linux/kdev_t.h>
	#include <linux/delay.h>
	#include <linux/seq_file.h>
	#include <linux/interrupt.h>
	#include <linux/of_platform.h>
	#include <linux/memblock.h>

	#include <asm/system.h>
	#include <asm/time.h>
	#include <asm/machdep.h>
	#include <asm/pci-bridge.h>
	#include <mm/mmu_decl.h>
	#include <asm/prom.h>
	#include <asm/udbg.h>
	#include <asm/mpic.h>
	#include <asm/i8259.h>
	#include <asm/swiotlb.h>

	#include <sysdev/fsl_soc.h>
	#include <sysdev/fsl_pci.h>

	#undef DEBUG

	#ifdef DEBUG
	#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)
	#else
	#define DBG(fmt, args...)
	#endif

	#ifdef CONFIG_PPC_I8259
	static void mpc85xx_8259_cascade(unsigned int irq, struct irq_desc *desc)
	{
	struct irq_chip *chip = irq_desc_get_chip(desc);
	unsigned int cascade_irq = i8259_irq();

	if (cascade_irq != NO_IRQ) {
	generic_handle_irq(cascade_irq);
	}
	chip->irq_eoi(&desc->irq_data);
	}
	#endif /* CONFIG_PPC_I8259 */

	void __init mpc85xx_ds_pic_init(void)
	{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np;
	#ifdef CONFIG_PPC_I8259
	struct device_node *cascade_node = NULL;
	int cascade_irq;
	#endif
	unsigned long root = of_get_flat_dt_root();

	np = of_find_node_by_type(NULL, "open-pic");
	if (np == NULL) {
	printk(KERN_ERR "Could not find open-pic node\n");
	return;
	}

	if (of_address_to_resource(np, 0, &r)) {
	printk(KERN_ERR "Failed to map mpic register space\n");
	of_node_put(np);
	return;
	}

	if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
	mpic = mpic_alloc(np, r.start,
	MPIC_PRIMARY \|
	MPIC_BIG_ENDIAN \| MPIC_BROKEN_FRR_NIRQS \|
	MPIC_SINGLE_DEST_CPU,
	0, 256, " OpenPIC ");
	} else {
	mpic = mpic_alloc(np, r.start,
	MPIC_PRIMARY \| MPIC_WANTS_RESET \|
	MPIC_BIG_ENDIAN \| MPIC_BROKEN_FRR_NIRQS \|
	MPIC_SINGLE_DEST_CPU,
	0, 256, " OpenPIC ");
	}

	BUG_ON(mpic == NULL);
	of_node_put(np);

	mpic_init(mpic);

	#ifdef CONFIG_PPC_I8259
	/* Initialize the i8259 controller */
	for_each_node_by_type(np, "interrupt-controller")
	if (of_device_is_compatible(np, "chrp,iic")) {
	cascade_node = np;
	break;
	}

	if (cascade_node == NULL) {
	printk(KERN_DEBUG "Could not find i8259 PIC\n");
	return;
	}

	cascade_irq = irq_of_parse_and_map(cascade_node, 0);
	if (cascade_irq == NO_IRQ) {
	printk(KERN_ERR "Failed to map cascade interrupt\n");
	return;
	}

	DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);

	i8259_init(cascade_node, 0);
	of_node_put(cascade_node);

	irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
	#endif /* CONFIG_PPC_I8259 */
	}

	#ifdef CONFIG_PCI
	static int primary_phb_addr;
	extern int uli_exclude_device(struct pci_controller *hose,
	u_char bus, u_char devfn);

	static int mpc85xx_exclude_device(struct pci_controller *hose,
	u_char bus, u_char devfn)
	{
	struct device_node* node;
	struct resource rsrc;

	node = hose->dn;
	of_address_to_resource(node, 0, &rsrc);

	if ((rsrc.start & 0xfffff) == primary_phb_addr) {
	return uli_exclude_device(hose, bus, devfn);
	}

	return PCIBIOS_SUCCESSFUL;
	}
	#endif /* CONFIG_PCI */

	/*
	* Setup the architecture
	*/
	#ifdef CONFIG_SMP
	extern void __init mpc85xx_smp_init(void);
	#endif
	static void __init mpc85xx_ds_setup_arch(void)
	{
	#ifdef CONFIG_PCI
	struct device_node *np;
	struct pci_controller *hose;
	#endif
	dma_addr_t max = 0xffffffff;

	if (ppc_md.progress)
	ppc_md.progress("mpc85xx_ds_setup_arch()", 0);

	#ifdef CONFIG_PCI
	for_each_node_by_type(np, "pci") {
	if (of_device_is_compatible(np, "fsl,mpc8540-pci") \|\|
	of_device_is_compatible(np, "fsl,mpc8548-pcie") \|\|
	of_device_is_compatible(np, "fsl,p2020-pcie")) {
	struct resource rsrc;
	of_address_to_resource(np, 0, &rsrc);
	if ((rsrc.start & 0xfffff) == primary_phb_addr)
	fsl_add_bridge(np, 1);
	else
	fsl_add_bridge(np, 0);

	hose = pci_find_hose_for_OF_device(np);
	max = min(max, hose->dma_window_base_cur +
	hose->dma_window_size);
	}
	}

	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
	#endif

	#ifdef CONFIG_SMP
	mpc85xx_smp_init();
	#endif

	#ifdef CONFIG_SWIOTLB
	if (memblock_end_of_DRAM() > max) {
	ppc_swiotlb_enable = 1;
	set_pci_dma_ops(&swiotlb_dma_ops);
	ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
	}
	#endif

	printk("MPC85xx DS board from Freescale Semiconductor\n");
	}

	/*
	* Called very early, device-tree isn't unflattened
	*/
	static int __init mpc8544_ds_probe(void)
	{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "MPC8544DS")) {
	#ifdef CONFIG_PCI
	primary_phb_addr = 0xb000;
	#endif
	return 1;
	}

	return 0;
	}

	static struct of_device_id __initdata mpc85xxds_ids[] = {
	{ .type = "soc", },
	{ .compatible = "soc", },
	{ .compatible = "simple-bus", },
	{ .compatible = "gianfar", },
	{},
	};

	static int __init mpc85xxds_publish_devices(void)
	{
	return of_platform_bus_probe(NULL, mpc85xxds_ids, NULL);
	}
	machine_device_initcall(mpc8544_ds, mpc85xxds_publish_devices);
	machine_device_initcall(mpc8572_ds, mpc85xxds_publish_devices);
	machine_device_initcall(p2020_ds, mpc85xxds_publish_devices);

	machine_arch_initcall(mpc8544_ds, swiotlb_setup_bus_notifier);
	machine_arch_initcall(mpc8572_ds, swiotlb_setup_bus_notifier);
	machine_arch_initcall(p2020_ds, swiotlb_setup_bus_notifier);

	/*
	* Called very early, device-tree isn't unflattened
	*/
	static int __init mpc8572_ds_probe(void)
	{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS")) {
	#ifdef CONFIG_PCI
	primary_phb_addr = 0x8000;
	#endif
	return 1;
	}

	return 0;
	}

	/*
	* Called very early, device-tree isn't unflattened
	*/
	static int __init p2020_ds_probe(void)
	{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "fsl,P2020DS")) {
	#ifdef CONFIG_PCI
	primary_phb_addr = 0x9000;
	#endif
	return 1;
	}

	return 0;
	}

	define_machine(mpc8544_ds) {
	.name = "MPC8544 DS",
	.probe = mpc8544_ds_probe,
	.setup_arch = mpc85xx_ds_setup_arch,
	.init_IRQ = mpc85xx_ds_pic_init,
	#ifdef CONFIG_PCI
	.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
	#endif
	.get_irq = mpic_get_irq,
	.restart = fsl_rstcr_restart,
	.calibrate_decr = generic_calibrate_decr,
	.progress = udbg_progress,
	};

	define_machine(mpc8572_ds) {
	.name = "MPC8572 DS",
	.probe = mpc8572_ds_probe,
	.setup_arch = mpc85xx_ds_setup_arch,
	.init_IRQ = mpc85xx_ds_pic_init,
	#ifdef CONFIG_PCI
	.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
	#endif
	.get_irq = mpic_get_irq,
	.restart = fsl_rstcr_restart,
	.calibrate_decr = generic_calibrate_decr,
	.progress = udbg_progress,
	};

	define_machine(p2020_ds) {
	.name = "P2020 DS",
	.probe = p2020_ds_probe,
	.setup_arch = mpc85xx_ds_setup_arch,
	.init_IRQ = mpc85xx_ds_pic_init,
	#ifdef CONFIG_PCI
	.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
	#endif
	.get_irq = mpic_get_irq,
	.restart = fsl_rstcr_restart,
	.calibrate_decr = generic_calibrate_decr,
	.progress = udbg_progress,
	};