arch/ppc/platforms/85xx/stx_gp3.c - linux - Git at Google

 /*
  * STx GP3 board specific routines
  *
  * Dan Malek <dan@embeddededge.com>
  * Copyright 2004 Embedded Edge, LLC
  *
  * Copied from mpc8560_ads.c
  * Copyright 2002, 2003 Motorola Inc.
  *
  * Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
  * Copyright 2004-2005 MontaVista Software, 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/blkdev.h>
 #include <linux/console.h>
 #include <linux/delay.h>
 #include <linux/root_dev.h>
 #include <linux/seq_file.h>
 #include <linux/serial.h>
 #include <linux/initrd.h>
 #include <linux/module.h>
 #include <linux/fsl_devices.h>
 #include <linux/interrupt.h>
 #include <linux/rio.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/open_pic.h>
 #include <asm/bootinfo.h>
 #include <asm/pci-bridge.h>
 #include <asm/mpc85xx.h>
 #include <asm/irq.h>
 #include <asm/immap_85xx.h>
 #include <asm/cpm2.h>
 #include <asm/mpc85xx.h>
 #include <asm/ppc_sys.h>

 #include <syslib/cpm2_pic.h>
 #include <syslib/ppc85xx_common.h>
 #include <syslib/ppc85xx_rio.h>


 unsigned char __res[sizeof(bd_t)];

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

 /* Internal interrupts are all Level Sensitive, and Positive Polarity */
 static u8 gp3_openpic_initsenses[] __initdata = {
 	MPC85XX_INTERNAL_IRQ_SENSES,
 	0x0,						/* External  0: */
 #if defined(CONFIG_PCI)
 	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 1: PCI slot 0 */
 	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 2: PCI slot 1 */
 	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 3: PCI slot 2 */
 	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),	/* External 4: PCI slot 3 */
 #else
 	0x0,				/* External  1: */
 	0x0,				/* External  2: */
 	0x0,				/* External  3: */
 	0x0,				/* External  4: */
 #endif
 	0x0,				/* External  5: */
 	0x0,				/* External  6: */
 	0x0,				/* External  7: */
 	0x0,				/* External  8: */
 	0x0,				/* External  9: */
 	0x0,				/* External 10: */
 	0x0,				/* External 11: */
 };

 /*
  * Setup the architecture
  */
 static void __init
 gp3_setup_arch(void)
 {
 	bd_t *binfo = (bd_t *) __res;
 	unsigned int freq;
 	struct gianfar_platform_data *pdata;
 	struct gianfar_mdio_data *mdata;

 	cpm2_reset();

 	/* get the core frequency */
 	freq = binfo->bi_intfreq;

 	if (ppc_md.progress)
 		ppc_md.progress("gp3_setup_arch()", 0);

 	/* Set loops_per_jiffy to a half-way reasonable value,
 	   for use until calibrate_delay gets called. */
 	loops_per_jiffy = freq / HZ;

 #ifdef CONFIG_PCI
 	/* setup PCI host bridges */
 	mpc85xx_setup_hose();
 #endif

 	/* setup the board related info for the MDIO bus */
 	mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);

 	mdata->irq[2] = MPC85xx_IRQ_EXT5;
 	mdata->irq[4] = MPC85xx_IRQ_EXT5;
 	mdata->irq[31] = -1;

 	/* setup the board related information for the enet controllers */
 	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
 	if (pdata) {
 	/*	pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
 		pdata->bus_id = 0;
 		pdata->phy_id = 2;
 		memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
 	}

 	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
 	if (pdata) {
 	/*	pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
 		pdata->bus_id = 0;
 		pdata->phy_id = 4;
 		memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
 	}

 #ifdef CONFIG_BLK_DEV_INITRD
 	if (initrd_start)
 		ROOT_DEV = Root_RAM0;
 	else
 #endif
 #ifdef	CONFIG_ROOT_NFS
 		ROOT_DEV = Root_NFS;
 #else
 		ROOT_DEV = Root_HDA1;
 #endif

 	printk ("bi_immr_base = %8.8lx\n", binfo->bi_immr_base);
 }

 static irqreturn_t cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
 {
 	while ((irq = cpm2_get_irq(regs)) >= 0)
 		__do_IRQ(irq, regs);

 	return IRQ_HANDLED;
 }

 static struct irqaction cpm2_irqaction = {
 	.handler	= cpm2_cascade,
 	.flags		= SA_INTERRUPT,
 	.mask		= CPU_MASK_NONE,
 	.name		= "cpm2_cascade",
 };

 static void __init
 gp3_init_IRQ(void)
 {
 	bd_t *binfo = (bd_t *) __res;

 	/*
 	 * Setup OpenPIC
 	 */

 	/* Determine the Physical Address of the OpenPIC regs */
 	phys_addr_t OpenPIC_PAddr =
 	    binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
 	OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
 	OpenPIC_InitSenses = gp3_openpic_initsenses;
 	OpenPIC_NumInitSenses = sizeof (gp3_openpic_initsenses);

 	/* Skip reserved space and internal sources */
 	openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);

 	/* Map PIC IRQs 0-11 */
 	openpic_set_sources(48, 12, OpenPIC_Addr + 0x10000);

 	/*
 	 * Let openpic interrupts starting from an offset, to
 	 * leave space for cascading interrupts underneath.
 	 */
 	openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);

 	/* Setup CPM2 PIC */
         cpm2_init_IRQ();

 	setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);

 	return;
 }

 static int
 gp3_show_cpuinfo(struct seq_file *m)
 {
 	uint pvid, svid, phid1;
 	bd_t *binfo = (bd_t *) __res;
 	uint	memsize;
 	unsigned int freq;
 	extern unsigned long total_memory;	/* in mm/init */

 	/* get the core frequency */
 	freq = binfo->bi_intfreq;

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

 	memsize = total_memory;

 	seq_printf(m, "Vendor\t\t: RPC Electronics STx \n");
 	seq_printf(m, "Machine\t\t: GP3 - MPC%s\n", cur_ppc_sys_spec->ppc_sys_name);
 	seq_printf(m, "bus freq\t: %u.%.6u MHz\n", freq / 1000000,
 		   freq % 1000000);
 	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));

 	return 0;
 }

 #ifdef CONFIG_PCI
 int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel,
 		    unsigned char pin)
 {
 	static char pci_irq_table[][4] =
 	    /*
 	     *      PCI IDSEL/INTPIN->INTLINE
 	     *        A      B      C      D
 	     */
 	{
 		{PIRQA, PIRQB, PIRQC, PIRQD},
 		{PIRQD, PIRQA, PIRQB, PIRQC},
 		{PIRQC, PIRQD, PIRQA, PIRQB},
 		{PIRQB, PIRQC, PIRQD, PIRQA},
 	};

 	const long min_idsel = 12, max_idsel = 15, irqs_per_slot = 4;
 	return PCI_IRQ_TABLE_LOOKUP;
 }

 int mpc85xx_exclude_device(u_char bus, u_char devfn)
 {
 	if (bus == 0 && PCI_SLOT(devfn) == 0)
 		return PCIBIOS_DEVICE_NOT_FOUND;
 	else
 		return PCIBIOS_SUCCESSFUL;
 }
 #endif /* CONFIG_PCI */

 #ifdef CONFIG_RAPIDIO
 void
 platform_rio_init(void)
 {
 	/*
 	 * The STx firmware configures the RapidIO Local Access Window
 	 * at 0xc0000000 with a size of 512MB.
 	 */
 	mpc85xx_rio_setup(0xc0000000, 0x20000000);
 }
 #endif /* CONFIG_RAPIDIO */

 void __init
 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 	      unsigned long r6, unsigned long r7)
 {
 	/* parse_bootinfo must always be called first */
 	parse_bootinfo(find_bootinfo());

 	/*
 	 * If we were passed in a board information, copy it into the
 	 * residual data area.
 	 */
 	if (r3) {
 		memcpy((void *) __res, (void *) (r3 + KERNELBASE),
 		       sizeof (bd_t));

 	}
 #if defined(CONFIG_BLK_DEV_INITRD)
 	/*
 	 * If the init RAM disk has been configured in, and there's a valid
 	 * starting address for it, set it up.
 	 */
 	if (r4) {
 		initrd_start = r4 + KERNELBASE;
 		initrd_end = r5 + KERNELBASE;
 	}
 #endif				/* CONFIG_BLK_DEV_INITRD */

 	/* Copy the kernel command line arguments to a safe place. */

 	if (r6) {
 		*(char *) (r7 + KERNELBASE) = 0;
 		strcpy(cmd_line, (char *) (r6 + KERNELBASE));
 	}

 	identify_ppc_sys_by_id(mfspr(SPRN_SVR));

 	/* setup the PowerPC module struct */
 	ppc_md.setup_arch = gp3_setup_arch;
 	ppc_md.show_cpuinfo = gp3_show_cpuinfo;

 	ppc_md.init_IRQ = gp3_init_IRQ;
 	ppc_md.get_irq = openpic_get_irq;

 	ppc_md.restart = mpc85xx_restart;
 	ppc_md.power_off = mpc85xx_power_off;
 	ppc_md.halt = mpc85xx_halt;

 	ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;

 	ppc_md.calibrate_decr = mpc85xx_calibrate_decr;

 	if (ppc_md.progress)
 		ppc_md.progress("platform_init(): exit", 0);

 	return;
 }
	/*
	* STx GP3 board specific routines
	*
	* Dan Malek <dan@embeddededge.com>
	* Copyright 2004 Embedded Edge, LLC
	*
	* Copied from mpc8560_ads.c
	* Copyright 2002, 2003 Motorola Inc.
	*
	* Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
	* Copyright 2004-2005 MontaVista Software, 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/blkdev.h>
	#include <linux/console.h>
	#include <linux/delay.h>
	#include <linux/root_dev.h>
	#include <linux/seq_file.h>
	#include <linux/serial.h>
	#include <linux/initrd.h>
	#include <linux/module.h>
	#include <linux/fsl_devices.h>
	#include <linux/interrupt.h>
	#include <linux/rio.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/open_pic.h>
	#include <asm/bootinfo.h>
	#include <asm/pci-bridge.h>
	#include <asm/mpc85xx.h>
	#include <asm/irq.h>
	#include <asm/immap_85xx.h>
	#include <asm/cpm2.h>
	#include <asm/mpc85xx.h>
	#include <asm/ppc_sys.h>

	#include <syslib/cpm2_pic.h>
	#include <syslib/ppc85xx_common.h>
	#include <syslib/ppc85xx_rio.h>


	unsigned char __res[sizeof(bd_t)];

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

	/* Internal interrupts are all Level Sensitive, and Positive Polarity */
	static u8 gp3_openpic_initsenses[] __initdata = {
	MPC85XX_INTERNAL_IRQ_SENSES,
	0x0, /* External 0: */
	#if defined(CONFIG_PCI)
	(IRQ_SENSE_LEVEL \| IRQ_POLARITY_NEGATIVE), /* External 1: PCI slot 0 */
	(IRQ_SENSE_LEVEL \| IRQ_POLARITY_NEGATIVE), /* External 2: PCI slot 1 */
	(IRQ_SENSE_LEVEL \| IRQ_POLARITY_NEGATIVE), /* External 3: PCI slot 2 */
	(IRQ_SENSE_LEVEL \| IRQ_POLARITY_NEGATIVE), /* External 4: PCI slot 3 */
	#else
	0x0, /* External 1: */
	0x0, /* External 2: */
	0x0, /* External 3: */
	0x0, /* External 4: */
	#endif
	0x0, /* External 5: */
	0x0, /* External 6: */
	0x0, /* External 7: */
	0x0, /* External 8: */
	0x0, /* External 9: */
	0x0, /* External 10: */
	0x0, /* External 11: */
	};

	/*
	* Setup the architecture
	*/
	static void __init
	gp3_setup_arch(void)
	{
	bd_t binfo = (bd_t ) __res;
	unsigned int freq;
	struct gianfar_platform_data *pdata;
	struct gianfar_mdio_data *mdata;

	cpm2_reset();

	/* get the core frequency */
	freq = binfo->bi_intfreq;

	if (ppc_md.progress)
	ppc_md.progress("gp3_setup_arch()", 0);

	/* Set loops_per_jiffy to a half-way reasonable value,
	for use until calibrate_delay gets called. */
	loops_per_jiffy = freq / HZ;

	#ifdef CONFIG_PCI
	/* setup PCI host bridges */
	mpc85xx_setup_hose();
	#endif

	/* setup the board related info for the MDIO bus */
	mdata = (struct gianfar_mdio_data *) ppc_sys_get_pdata(MPC85xx_MDIO);

	mdata->irq[2] = MPC85xx_IRQ_EXT5;
	mdata->irq[4] = MPC85xx_IRQ_EXT5;
	mdata->irq[31] = -1;

	/* setup the board related information for the enet controllers */
	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
	if (pdata) {
	/* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
	pdata->bus_id = 0;
	pdata->phy_id = 2;
	memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
	}

	pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
	if (pdata) {
	/* pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR; */
	pdata->bus_id = 0;
	pdata->phy_id = 4;
	memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
	}

	#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
	ROOT_DEV = Root_RAM0;
	else
	#endif
	#ifdef CONFIG_ROOT_NFS
	ROOT_DEV = Root_NFS;
	#else
	ROOT_DEV = Root_HDA1;
	#endif

	printk ("bi_immr_base = %8.8lx\n", binfo->bi_immr_base);
	}

	static irqreturn_t cpm2_cascade(int irq, void dev_id, struct pt_regs regs)
	{
	while ((irq = cpm2_get_irq(regs)) >= 0)
	__do_IRQ(irq, regs);

	return IRQ_HANDLED;
	}

	static struct irqaction cpm2_irqaction = {
	.handler = cpm2_cascade,
	.flags = SA_INTERRUPT,
	.mask = CPU_MASK_NONE,
	.name = "cpm2_cascade",
	};

	static void __init
	gp3_init_IRQ(void)
	{
	bd_t binfo = (bd_t ) __res;

	/*
	* Setup OpenPIC
	*/

	/* Determine the Physical Address of the OpenPIC regs */
	phys_addr_t OpenPIC_PAddr =
	binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
	OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
	OpenPIC_InitSenses = gp3_openpic_initsenses;
	OpenPIC_NumInitSenses = sizeof (gp3_openpic_initsenses);

	/* Skip reserved space and internal sources */
	openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);

	/* Map PIC IRQs 0-11 */
	openpic_set_sources(48, 12, OpenPIC_Addr + 0x10000);

	/*
	* Let openpic interrupts starting from an offset, to
	* leave space for cascading interrupts underneath.
	*/
	openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);

	/* Setup CPM2 PIC */
	cpm2_init_IRQ();

	setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);

	return;
	}

	static int
	gp3_show_cpuinfo(struct seq_file *m)
	{
	uint pvid, svid, phid1;
	bd_t binfo = (bd_t ) __res;
	uint memsize;
	unsigned int freq;
	extern unsigned long total_memory; /* in mm/init */

	/* get the core frequency */
	freq = binfo->bi_intfreq;

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

	memsize = total_memory;

	seq_printf(m, "Vendor\t\t: RPC Electronics STx \n");
	seq_printf(m, "Machine\t\t: GP3 - MPC%s\n", cur_ppc_sys_spec->ppc_sys_name);
	seq_printf(m, "bus freq\t: %u.%.6u MHz\n", freq / 1000000,
	freq % 1000000);
	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));

	return 0;
	}

	#ifdef CONFIG_PCI
	int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel,
	unsigned char pin)
	{
	static char pci_irq_table[][4] =
	/*
	* PCI IDSEL/INTPIN->INTLINE
	* A B C D
	*/
	{
	{PIRQA, PIRQB, PIRQC, PIRQD},
	{PIRQD, PIRQA, PIRQB, PIRQC},
	{PIRQC, PIRQD, PIRQA, PIRQB},
	{PIRQB, PIRQC, PIRQD, PIRQA},
	};

	const long min_idsel = 12, max_idsel = 15, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
	}

	int mpc85xx_exclude_device(u_char bus, u_char devfn)
	{
	if (bus == 0 && PCI_SLOT(devfn) == 0)
	return PCIBIOS_DEVICE_NOT_FOUND;
	else
	return PCIBIOS_SUCCESSFUL;
	}
	#endif /* CONFIG_PCI */

	#ifdef CONFIG_RAPIDIO
	void
	platform_rio_init(void)
	{
	/*
	* The STx firmware configures the RapidIO Local Access Window
	* at 0xc0000000 with a size of 512MB.
	*/
	mpc85xx_rio_setup(0xc0000000, 0x20000000);
	}
	#endif /* CONFIG_RAPIDIO */

	void __init
	platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
	unsigned long r6, unsigned long r7)
	{
	/* parse_bootinfo must always be called first */
	parse_bootinfo(find_bootinfo());

	/*
	* If we were passed in a board information, copy it into the
	* residual data area.
	*/
	if (r3) {
	memcpy((void ) __res, (void ) (r3 + KERNELBASE),
	sizeof (bd_t));

	}
	#if defined(CONFIG_BLK_DEV_INITRD)
	/*
	* If the init RAM disk has been configured in, and there's a valid
	* starting address for it, set it up.
	*/
	if (r4) {
	initrd_start = r4 + KERNELBASE;
	initrd_end = r5 + KERNELBASE;
	}
	#endif /* CONFIG_BLK_DEV_INITRD */

	/* Copy the kernel command line arguments to a safe place. */

	if (r6) {
	(char ) (r7 + KERNELBASE) = 0;
	strcpy(cmd_line, (char *) (r6 + KERNELBASE));
	}

	identify_ppc_sys_by_id(mfspr(SPRN_SVR));

	/* setup the PowerPC module struct */
	ppc_md.setup_arch = gp3_setup_arch;
	ppc_md.show_cpuinfo = gp3_show_cpuinfo;

	ppc_md.init_IRQ = gp3_init_IRQ;
	ppc_md.get_irq = openpic_get_irq;

	ppc_md.restart = mpc85xx_restart;
	ppc_md.power_off = mpc85xx_power_off;
	ppc_md.halt = mpc85xx_halt;

	ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;

	ppc_md.calibrate_decr = mpc85xx_calibrate_decr;

	if (ppc_md.progress)
	ppc_md.progress("platform_init(): exit", 0);

	return;
	}