arch/powerpc/platforms/85xx/mpc85xx_cds.c - maze/linux - Git at Google

 /*
  * MPC85xx setup and early boot code plus other random bits.
  *
  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
  *
  * Copyright 2005 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/config.h>
 #include <linux/stddef.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/reboot.h>
 #include <linux/pci.h>
 #include <linux/kdev_t.h>
 #include <linux/major.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 #include <linux/initrd.h>
 #include <linux/module.h>
 #include <linux/fsl_devices.h>

 #include <asm/system.h>
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/atomic.h>
 #include <asm/time.h>
 #include <asm/io.h>
 #include <asm/machdep.h>
 #include <asm/ipic.h>
 #include <asm/bootinfo.h>
 #include <asm/pci-bridge.h>
 #include <asm/mpc85xx.h>
 #include <asm/irq.h>
 #include <mm/mmu_decl.h>
 #include <asm/prom.h>
 #include <asm/udbg.h>
 #include <asm/mpic.h>
 #include <asm/i8259.h>

 #include <sysdev/fsl_soc.h>
 #include "mpc85xx.h"

 #ifndef CONFIG_PCI
 unsigned long isa_io_base = 0;
 unsigned long isa_mem_base = 0;
 #endif

 static int cds_pci_slot = 2;
 static volatile u8 *cadmus;


 #ifdef CONFIG_PCI

 #define ARCADIA_HOST_BRIDGE_IDSEL	17
 #define ARCADIA_2ND_BRIDGE_IDSEL	3

 extern int mpc85xx_pci2_busno;

 int
 mpc85xx_exclude_device(u_char bus, u_char devfn)
 {
 	if (bus == 0 && PCI_SLOT(devfn) == 0)
 		return PCIBIOS_DEVICE_NOT_FOUND;
 	if (mpc85xx_pci2_busno)
 		if (bus == (mpc85xx_pci2_busno) && PCI_SLOT(devfn) == 0)
 			return PCIBIOS_DEVICE_NOT_FOUND;
 	/* We explicitly do not go past the Tundra 320 Bridge */
 	if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
 		return PCIBIOS_DEVICE_NOT_FOUND;
 	if ((bus == 0) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
 		return PCIBIOS_DEVICE_NOT_FOUND;
 	else
 		return PCIBIOS_SUCCESSFUL;
 }

 void __init
 mpc85xx_cds_pcibios_fixup(void)
 {
 	struct pci_dev *dev;
 	u_char		c;

 	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
 					PCI_DEVICE_ID_VIA_82C586_1, NULL))) {
 		/*
 		 * U-Boot does not set the enable bits
 		 * for the IDE device. Force them on here.
 		 */
 		pci_read_config_byte(dev, 0x40, &c);
 		c |= 0x03; /* IDE: Chip Enable Bits */
 		pci_write_config_byte(dev, 0x40, c);

 		/*
 		 * Since only primary interface works, force the
 		 * IDE function to standard primary IDE interrupt
 		 * w/ 8259 offset
 		 */
 		dev->irq = 14;
 		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
 		pci_dev_put(dev);
 	}

 	/*
 	 * Force legacy USB interrupt routing
 	 */
 	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
 					PCI_DEVICE_ID_VIA_82C586_2, NULL))) {
 		dev->irq = 10;
 		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 10);
 		pci_dev_put(dev);
 	}

 	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
 					PCI_DEVICE_ID_VIA_82C586_2, dev))) {
 		dev->irq = 11;
 		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
 		pci_dev_put(dev);
 	}

 	/* Now map all the PCI irqs */
 	dev = NULL;
 	for_each_pci_dev(dev)
 		pci_read_irq_line(dev);
 }

 #ifdef CONFIG_PPC_I8259
 #warning The i8259 PIC support is currently broken
 static void mpc85xx_8259_cascade(unsigned int irq, struct
 		irq_desc *desc, struct pt_regs *regs)
 {
 	unsigned int cascade_irq = i8259_irq(regs);

 	if (cascade_irq != NO_IRQ)
 		generic_handle_irq(cascade_irq, regs);

 	desc->chip->eoi(irq);
 }
 #endif /* PPC_I8259 */
 #endif /* CONFIG_PCI */

 void __init mpc85xx_cds_pic_init(void)
 {
 	struct mpic *mpic;
 	struct resource r;
 	struct device_node *np = NULL;
 	struct device_node *cascade_node = NULL;
 	int cascade_irq;

 	np = of_find_node_by_type(np, "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;
 	}

 	mpic = mpic_alloc(np, r.start,
 			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
 			4, 0, " OpenPIC  ");
 	BUG_ON(mpic == NULL);

 	/* Return the mpic node */
 	of_node_put(np);

 	mpic_assign_isu(mpic, 0, r.start + 0x10200);
 	mpic_assign_isu(mpic, 1, r.start + 0x10280);
 	mpic_assign_isu(mpic, 2, r.start + 0x10300);
 	mpic_assign_isu(mpic, 3, r.start + 0x10380);
 	mpic_assign_isu(mpic, 4, r.start + 0x10400);
 	mpic_assign_isu(mpic, 5, r.start + 0x10480);
 	mpic_assign_isu(mpic, 6, r.start + 0x10500);
 	mpic_assign_isu(mpic, 7, r.start + 0x10580);

 	/* Used only for 8548 so far, but no harm in
 	 * allocating them for everyone */
 	mpic_assign_isu(mpic, 8, r.start + 0x10600);
 	mpic_assign_isu(mpic, 9, r.start + 0x10680);
 	mpic_assign_isu(mpic, 10, r.start + 0x10700);
 	mpic_assign_isu(mpic, 11, r.start + 0x10780);

 	/* External Interrupts */
 	mpic_assign_isu(mpic, 12, r.start + 0x10000);
 	mpic_assign_isu(mpic, 13, r.start + 0x10080);
 	mpic_assign_isu(mpic, 14, r.start + 0x10100);

 	mpic_init(mpic);

 #ifdef CONFIG_PPC_I8259
 	/* Initialize the i8259 controller */
 	for_each_node_by_type(np, "interrupt-controller")
 		if (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;
 	}

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

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


 /*
  * Setup the architecture
  */
 static void __init
 mpc85xx_cds_setup_arch(void)
 {
 	struct device_node *cpu;
 #ifdef CONFIG_PCI
 	struct device_node *np;
 #endif

 	if (ppc_md.progress)
 		ppc_md.progress("mpc85xx_cds_setup_arch()", 0);

 	cpu = of_find_node_by_type(NULL, "cpu");
 	if (cpu != 0) {
 		const unsigned int *fp;

 		fp = get_property(cpu, "clock-frequency", NULL);
 		if (fp != 0)
 			loops_per_jiffy = *fp / HZ;
 		else
 			loops_per_jiffy = 500000000 / HZ;
 		of_node_put(cpu);
 	}

 	cadmus = ioremap(CADMUS_BASE, CADMUS_SIZE);
 	cds_pci_slot = ((cadmus[CM_CSR] >> 6) & 0x3) + 1;

 	if (ppc_md.progress) {
 		char buf[40];
 		snprintf(buf, 40, "CDS Version = 0x%x in slot %d\n",
 				cadmus[CM_VER], cds_pci_slot);
 		ppc_md.progress(buf, 0);
 	}

 #ifdef CONFIG_PCI
 	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
 		add_bridge(np);

 	ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
 	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
 #endif

 #ifdef  CONFIG_ROOT_NFS
 	ROOT_DEV = Root_NFS;
 #else
 	ROOT_DEV = Root_HDA1;
 #endif
 }


 void
 mpc85xx_cds_show_cpuinfo(struct seq_file *m)
 {
 	uint pvid, svid, phid1;
 	uint memsize = total_memory;

 	pvid = mfspr(SPRN_PVR);
 	svid = mfspr(SPRN_SVR);

 	seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 	seq_printf(m, "Machine\t\t: MPC85xx CDS (0x%x)\n", cadmus[CM_VER]);
 	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 	seq_printf(m, "SVR\t\t: 0x%x\n", svid);

 	/* Display cpu Pll setting */
 	phid1 = mfspr(SPRN_HID1);
 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));

 	/* Display the amount of memory */
 	seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
 }


 /*
  * Called very early, device-tree isn't unflattened
  */
 static int __init mpc85xx_cds_probe(void)
 {
 	/* We always match for now, eventually we should look at
 	 * the flat dev tree to ensure this is the board we are
 	 * supposed to run on
 	 */
 	return 1;
 }

 define_machine(mpc85xx_cds) {
 	.name		= "MPC85xx CDS",
 	.probe		= mpc85xx_cds_probe,
 	.setup_arch	= mpc85xx_cds_setup_arch,
 	.init_IRQ	= mpc85xx_cds_pic_init,
 	.show_cpuinfo	= mpc85xx_cds_show_cpuinfo,
 	.get_irq	= mpic_get_irq,
 	.restart	= mpc85xx_restart,
 	.calibrate_decr = generic_calibrate_decr,
 	.progress	= udbg_progress,
 };
	/*
	* MPC85xx setup and early boot code plus other random bits.
	*
	* Maintained by Kumar Gala (see MAINTAINERS for contact information)
	*
	* Copyright 2005 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/config.h>
	#include <linux/stddef.h>
	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/errno.h>
	#include <linux/reboot.h>
	#include <linux/pci.h>
	#include <linux/kdev_t.h>
	#include <linux/major.h>
	#include <linux/console.h>
	#include <linux/delay.h>
	#include <linux/seq_file.h>
	#include <linux/root_dev.h>
	#include <linux/initrd.h>
	#include <linux/module.h>
	#include <linux/fsl_devices.h>

	#include <asm/system.h>
	#include <asm/pgtable.h>
	#include <asm/page.h>
	#include <asm/atomic.h>
	#include <asm/time.h>
	#include <asm/io.h>
	#include <asm/machdep.h>
	#include <asm/ipic.h>
	#include <asm/bootinfo.h>
	#include <asm/pci-bridge.h>
	#include <asm/mpc85xx.h>
	#include <asm/irq.h>
	#include <mm/mmu_decl.h>
	#include <asm/prom.h>
	#include <asm/udbg.h>
	#include <asm/mpic.h>
	#include <asm/i8259.h>

	#include <sysdev/fsl_soc.h>
	#include "mpc85xx.h"

	#ifndef CONFIG_PCI
	unsigned long isa_io_base = 0;
	unsigned long isa_mem_base = 0;
	#endif

	static int cds_pci_slot = 2;
	static volatile u8 *cadmus;


	#ifdef CONFIG_PCI

	#define ARCADIA_HOST_BRIDGE_IDSEL 17
	#define ARCADIA_2ND_BRIDGE_IDSEL 3

	extern int mpc85xx_pci2_busno;

	int
	mpc85xx_exclude_device(u_char bus, u_char devfn)
	{
	if (bus == 0 && PCI_SLOT(devfn) == 0)
	return PCIBIOS_DEVICE_NOT_FOUND;
	if (mpc85xx_pci2_busno)
	if (bus == (mpc85xx_pci2_busno) && PCI_SLOT(devfn) == 0)
	return PCIBIOS_DEVICE_NOT_FOUND;
	/* We explicitly do not go past the Tundra 320 Bridge */
	if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
	return PCIBIOS_DEVICE_NOT_FOUND;
	if ((bus == 0) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
	return PCIBIOS_DEVICE_NOT_FOUND;
	else
	return PCIBIOS_SUCCESSFUL;
	}

	void __init
	mpc85xx_cds_pcibios_fixup(void)
	{
	struct pci_dev *dev;
	u_char c;

	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
	PCI_DEVICE_ID_VIA_82C586_1, NULL))) {
	/*
	* U-Boot does not set the enable bits
	* for the IDE device. Force them on here.
	*/
	pci_read_config_byte(dev, 0x40, &c);
	c \|= 0x03; /* IDE: Chip Enable Bits */
	pci_write_config_byte(dev, 0x40, c);

	/*
	* Since only primary interface works, force the
	* IDE function to standard primary IDE interrupt
	* w/ 8259 offset
	*/
	dev->irq = 14;
	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
	pci_dev_put(dev);
	}

	/*
	* Force legacy USB interrupt routing
	*/
	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
	PCI_DEVICE_ID_VIA_82C586_2, NULL))) {
	dev->irq = 10;
	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 10);
	pci_dev_put(dev);
	}

	if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
	PCI_DEVICE_ID_VIA_82C586_2, dev))) {
	dev->irq = 11;
	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
	pci_dev_put(dev);
	}

	/* Now map all the PCI irqs */
	dev = NULL;
	for_each_pci_dev(dev)
	pci_read_irq_line(dev);
	}

	#ifdef CONFIG_PPC_I8259
	#warning The i8259 PIC support is currently broken
	static void mpc85xx_8259_cascade(unsigned int irq, struct
	irq_desc desc, struct pt_regs regs)
	{
	unsigned int cascade_irq = i8259_irq(regs);

	if (cascade_irq != NO_IRQ)
	generic_handle_irq(cascade_irq, regs);

	desc->chip->eoi(irq);
	}
	#endif /* PPC_I8259 */
	#endif /* CONFIG_PCI */

	void __init mpc85xx_cds_pic_init(void)
	{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np = NULL;
	struct device_node *cascade_node = NULL;
	int cascade_irq;

	np = of_find_node_by_type(np, "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;
	}

	mpic = mpic_alloc(np, r.start,
	MPIC_PRIMARY \| MPIC_WANTS_RESET \| MPIC_BIG_ENDIAN,
	4, 0, " OpenPIC ");
	BUG_ON(mpic == NULL);

	/* Return the mpic node */
	of_node_put(np);

	mpic_assign_isu(mpic, 0, r.start + 0x10200);
	mpic_assign_isu(mpic, 1, r.start + 0x10280);
	mpic_assign_isu(mpic, 2, r.start + 0x10300);
	mpic_assign_isu(mpic, 3, r.start + 0x10380);
	mpic_assign_isu(mpic, 4, r.start + 0x10400);
	mpic_assign_isu(mpic, 5, r.start + 0x10480);
	mpic_assign_isu(mpic, 6, r.start + 0x10500);
	mpic_assign_isu(mpic, 7, r.start + 0x10580);

	/* Used only for 8548 so far, but no harm in
	* allocating them for everyone */
	mpic_assign_isu(mpic, 8, r.start + 0x10600);
	mpic_assign_isu(mpic, 9, r.start + 0x10680);
	mpic_assign_isu(mpic, 10, r.start + 0x10700);
	mpic_assign_isu(mpic, 11, r.start + 0x10780);

	/* External Interrupts */
	mpic_assign_isu(mpic, 12, r.start + 0x10000);
	mpic_assign_isu(mpic, 13, r.start + 0x10080);
	mpic_assign_isu(mpic, 14, r.start + 0x10100);

	mpic_init(mpic);

	#ifdef CONFIG_PPC_I8259
	/* Initialize the i8259 controller */
	for_each_node_by_type(np, "interrupt-controller")
	if (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;
	}

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

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


	/*
	* Setup the architecture
	*/
	static void __init
	mpc85xx_cds_setup_arch(void)
	{
	struct device_node *cpu;
	#ifdef CONFIG_PCI
	struct device_node *np;
	#endif

	if (ppc_md.progress)
	ppc_md.progress("mpc85xx_cds_setup_arch()", 0);

	cpu = of_find_node_by_type(NULL, "cpu");
	if (cpu != 0) {
	const unsigned int *fp;

	fp = get_property(cpu, "clock-frequency", NULL);
	if (fp != 0)
	loops_per_jiffy = *fp / HZ;
	else
	loops_per_jiffy = 500000000 / HZ;
	of_node_put(cpu);
	}

	cadmus = ioremap(CADMUS_BASE, CADMUS_SIZE);
	cds_pci_slot = ((cadmus[CM_CSR] >> 6) & 0x3) + 1;

	if (ppc_md.progress) {
	char buf[40];
	snprintf(buf, 40, "CDS Version = 0x%x in slot %d\n",
	cadmus[CM_VER], cds_pci_slot);
	ppc_md.progress(buf, 0);
	}

	#ifdef CONFIG_PCI
	for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
	add_bridge(np);

	ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
	ppc_md.pci_exclude_device = mpc85xx_exclude_device;
	#endif

	#ifdef CONFIG_ROOT_NFS
	ROOT_DEV = Root_NFS;
	#else
	ROOT_DEV = Root_HDA1;
	#endif
	}


	void
	mpc85xx_cds_show_cpuinfo(struct seq_file *m)
	{
	uint pvid, svid, phid1;
	uint memsize = total_memory;

	pvid = mfspr(SPRN_PVR);
	svid = mfspr(SPRN_SVR);

	seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
	seq_printf(m, "Machine\t\t: MPC85xx CDS (0x%x)\n", cadmus[CM_VER]);
	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
	seq_printf(m, "SVR\t\t: 0x%x\n", svid);

	/* Display cpu Pll setting */
	phid1 = mfspr(SPRN_HID1);
	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));

	/* Display the amount of memory */
	seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
	}


	/*
	* Called very early, device-tree isn't unflattened
	*/
	static int __init mpc85xx_cds_probe(void)
	{
	/* We always match for now, eventually we should look at
	* the flat dev tree to ensure this is the board we are
	* supposed to run on
	*/
	return 1;
	}

	define_machine(mpc85xx_cds) {
	.name = "MPC85xx CDS",
	.probe = mpc85xx_cds_probe,
	.setup_arch = mpc85xx_cds_setup_arch,
	.init_IRQ = mpc85xx_cds_pic_init,
	.show_cpuinfo = mpc85xx_cds_show_cpuinfo,
	.get_irq = mpic_get_irq,
	.restart = mpc85xx_restart,
	.calibrate_decr = generic_calibrate_decr,
	.progress = udbg_progress,
	};