arch/mips/txx9/rbtx4927/setup.c

/*
 * Toshiba rbtx4927 specific setup
 *
 * Author: MontaVista Software, Inc.
 *         source@mvista.com
 *
 * Copyright 2001-2002 MontaVista Software Inc.
 *
 * Copyright (C) 1996, 97, 2001, 04  Ralf Baechle (ralf@linux-mips.org)
 * Copyright (C) 2000 RidgeRun, Inc.
 * Author: RidgeRun, Inc.
 *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
 *
 * Copyright 2001 MontaVista Software Inc.
 * Author: jsun@mvista.com or jsun@junsun.net
 *
 * Copyright 2002 MontaVista Software Inc.
 * Author: Michael Pruznick, michael_pruznick@mvista.com
 *
 * Copyright (C) 2000-2001 Toshiba Corporation
 *
 * Copyright (C) 2004 MontaVista Software Inc.
 * Author: Manish Lachwani, mlachwani@mvista.com
 *
 *  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.
 *
 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <linux/clk.h>

#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/time.h>
#include <asm/txx9tmr.h>
#ifdef CONFIG_TOSHIBA_FPCIB0
#include <asm/txx9/smsc_fdc37m81x.h>
#endif
#include <asm/txx9/rbtx4927.h>
#ifdef CONFIG_SERIAL_TXX9
#include <linux/serial_core.h>
#endif

/* These functions are used for rebooting or halting the machine*/
extern void toshiba_rbtx4927_restart(char *command);
extern void toshiba_rbtx4927_halt(void);
extern void toshiba_rbtx4927_power_off(void);

int tx4927_using_backplane = 0;

extern void toshiba_rbtx4927_irq_setup(void);

char *prom_getcmdline(void);

#ifdef CONFIG_PCI
#undef TX4927_SUPPORT_COMMAND_IO
#undef  TX4927_SUPPORT_PCI_66
int tx4927_cpu_clock = 100000000;	/* 100MHz */
unsigned long mips_pci_io_base;
unsigned long mips_pci_io_size;
unsigned long mips_pci_mem_base;
unsigned long mips_pci_mem_size;
/* for legacy I/O, PCI I/O PCI Bus address must be 0 */
unsigned long mips_pci_io_pciaddr = 0;
unsigned long mips_memory_upper;
static int tx4927_ccfg_toeon = 1;
static int tx4927_pcic_trdyto = 0;	/* default: disabled */
unsigned long tx4927_ce_base[8];
int tx4927_pci66 = 0;		/* 0:auto */
#endif

char *toshiba_name = "";

#ifdef CONFIG_PCI
extern struct pci_controller tx4927_controller;

static struct pci_dev *fake_pci_dev(struct pci_controller *hose,
				    int top_bus, int busnr, int devfn)
{
	static struct pci_dev dev;
	static struct pci_bus bus;

	dev.sysdata = (void *)hose;
	dev.devfn = devfn;
	bus.number = busnr;
	bus.ops = hose->pci_ops;
	bus.parent = NULL;
	dev.bus = &bus;

	return &dev;
}

#define EARLY_PCI_OP(rw, size, type)                                    \
static int early_##rw##_config_##size(struct pci_controller *hose,      \
        int top_bus, int bus, int devfn, int offset, type value)        \
{                                                                       \
        return pci_##rw##_config_##size(                                \
                fake_pci_dev(hose, top_bus, bus, devfn),                \
                offset, value);                                         \
}

EARLY_PCI_OP(read, byte, u8 *)
EARLY_PCI_OP(read, dword, u32 *)
EARLY_PCI_OP(write, byte, u8)
EARLY_PCI_OP(write, dword, u32)

static int __init tx4927_pcibios_init(void)
{
	unsigned int id;
	u32 pci_devfn;
	int devfn_start = 0;
	int devfn_stop = 0xff;
	int busno = 0; /* One bus on the Toshiba */
	struct pci_controller *hose = &tx4927_controller;

	for (pci_devfn = devfn_start; pci_devfn < devfn_stop; pci_devfn++) {
		early_read_config_dword(hose, busno, busno, pci_devfn,
					PCI_VENDOR_ID, &id);

		if (id == 0xffffffff) {
			continue;
		}

		if (id == 0x94601055) {
			u8 v08_64;
			u32 v32_b0;
			u8 v08_e1;

			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x64, &v08_64);
			early_read_config_dword(hose, busno, busno,
						pci_devfn, 0xb0, &v32_b0);
			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0xe1, &v08_e1);

			/* serial irq control */
			v08_64 = 0xd0;

			/* serial irq pin */
			v32_b0 |= 0x00010000;

			/* ide irq on isa14 */
			v08_e1 &= 0xf0;
			v08_e1 |= 0x0d;

			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x64, v08_64);
			early_write_config_dword(hose, busno, busno,
						 pci_devfn, 0xb0, v32_b0);
			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0xe1, v08_e1);
		}

		if (id == 0x91301055) {
			u8 v08_04;
			u8 v08_09;
			u8 v08_41;
			u8 v08_43;
			u8 v08_5c;

			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x04, &v08_04);
			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x09, &v08_09);
			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x41, &v08_41);
			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x43, &v08_43);
			early_read_config_byte(hose, busno, busno,
					       pci_devfn, 0x5c, &v08_5c);

			/* enable ide master/io */
			v08_04 |= (PCI_COMMAND_MASTER | PCI_COMMAND_IO);

			/* enable ide native mode */
			v08_09 |= 0x05;

			/* enable primary ide */
			v08_41 |= 0x80;

			/* enable secondary ide */
			v08_43 |= 0x80;

			/*
			 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
			 *
			 * This line of code is intended to provide the user with a work
			 * around solution to the anomalies cited in SMSC's anomaly sheet
			 * entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"".
			 *
			 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
			 */
			v08_5c |= 0x01;

			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x5c, v08_5c);
			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x04, v08_04);
			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x09, v08_09);
			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x41, v08_41);
			early_write_config_byte(hose, busno, busno,
						pci_devfn, 0x43, v08_43);
		}

	}

	register_pci_controller(&tx4927_controller);
	return 0;
}

arch_initcall(tx4927_pcibios_init);

extern struct resource pci_io_resource;
extern struct resource pci_mem_resource;

void __init tx4927_pci_setup(void)
{
	static int called = 0;
	extern unsigned int tx4927_get_mem_size(void);

	mips_memory_upper = tx4927_get_mem_size() << 20;
	mips_memory_upper += KSEG0;
	mips_pci_io_base = TX4927_PCIIO;
	mips_pci_io_size = TX4927_PCIIO_SIZE;
	mips_pci_mem_base = TX4927_PCIMEM;
	mips_pci_mem_size = TX4927_PCIMEM_SIZE;

	if (!called) {
		printk
		    ("%s PCIC -- DID:%04x VID:%04x RID:%02x Arbiter:%s\n",
		     toshiba_name,
		     (unsigned short) (tx4927_pcicptr->pciid >> 16),
		     (unsigned short) (tx4927_pcicptr->pciid & 0xffff),
		     (unsigned short) (tx4927_pcicptr->pciccrev & 0xff),
		     (!(tx4927_ccfgptr->
			ccfg & TX4927_CCFG_PCIXARB)) ? "External" :
		     "Internal");
		called = 1;
	}
	printk("%s PCIC --%s PCICLK:", toshiba_name,
	       (tx4927_ccfgptr->ccfg & TX4927_CCFG_PCI66) ? " PCI66" : "");
	if (tx4927_ccfgptr->pcfg & TX4927_PCFG_PCICLKEN_ALL) {
		int pciclk = 0;
		if (mips_machtype == MACH_TOSHIBA_RBTX4937)
			switch ((unsigned long) tx4927_ccfgptr->
				ccfg & TX4937_CCFG_PCIDIVMODE_MASK) {
			case TX4937_CCFG_PCIDIVMODE_4:
				pciclk = tx4927_cpu_clock / 4;
				break;
			case TX4937_CCFG_PCIDIVMODE_4_5:
				pciclk = tx4927_cpu_clock * 2 / 9;
				break;
			case TX4937_CCFG_PCIDIVMODE_5:
				pciclk = tx4927_cpu_clock / 5;
				break;
			case TX4937_CCFG_PCIDIVMODE_5_5:
				pciclk = tx4927_cpu_clock * 2 / 11;
				break;
			case TX4937_CCFG_PCIDIVMODE_8:
				pciclk = tx4927_cpu_clock / 8;
				break;
			case TX4937_CCFG_PCIDIVMODE_9:
				pciclk = tx4927_cpu_clock / 9;
				break;
			case TX4937_CCFG_PCIDIVMODE_10:
				pciclk = tx4927_cpu_clock / 10;
				break;
			case TX4937_CCFG_PCIDIVMODE_11:
				pciclk = tx4927_cpu_clock / 11;
				break;
			}

		else
			switch ((unsigned long) tx4927_ccfgptr->
				ccfg & TX4927_CCFG_PCIDIVMODE_MASK) {
			case TX4927_CCFG_PCIDIVMODE_2_5:
				pciclk = tx4927_cpu_clock * 2 / 5;
				break;
			case TX4927_CCFG_PCIDIVMODE_3:
				pciclk = tx4927_cpu_clock / 3;
				break;
			case TX4927_CCFG_PCIDIVMODE_5:
				pciclk = tx4927_cpu_clock / 5;
				break;
			case TX4927_CCFG_PCIDIVMODE_6:
				pciclk = tx4927_cpu_clock / 6;
				break;
			}

		printk("Internal(%dMHz)", pciclk / 1000000);
	} else
		printk("External");
	printk("\n");

	/* GB->PCI mappings */
	tx4927_pcicptr->g2piomask = (mips_pci_io_size - 1) >> 4;
	tx4927_pcicptr->g2piogbase = mips_pci_io_base |
#ifdef __BIG_ENDIAN
	    TX4927_PCIC_G2PIOGBASE_ECHG
#else
	    TX4927_PCIC_G2PIOGBASE_BSDIS
#endif
	    ;

	tx4927_pcicptr->g2piopbase = 0;

	tx4927_pcicptr->g2pmmask[0] = (mips_pci_mem_size - 1) >> 4;
	tx4927_pcicptr->g2pmgbase[0] = mips_pci_mem_base |
#ifdef __BIG_ENDIAN
	    TX4927_PCIC_G2PMnGBASE_ECHG
#else
	    TX4927_PCIC_G2PMnGBASE_BSDIS
#endif
	    ;
	tx4927_pcicptr->g2pmpbase[0] = mips_pci_mem_base;

	tx4927_pcicptr->g2pmmask[1] = 0;
	tx4927_pcicptr->g2pmgbase[1] = 0;
	tx4927_pcicptr->g2pmpbase[1] = 0;
	tx4927_pcicptr->g2pmmask[2] = 0;
	tx4927_pcicptr->g2pmgbase[2] = 0;
	tx4927_pcicptr->g2pmpbase[2] = 0;


	/* PCI->GB mappings (I/O 256B) */
	tx4927_pcicptr->p2giopbase = 0;	/* 256B */

	/* PCI->GB mappings (MEM 512MB) M0 gets all of memory */
	tx4927_pcicptr->p2gm0plbase = 0;
	tx4927_pcicptr->p2gm0pubase = 0;
	tx4927_pcicptr->p2gmgbase[0] = 0 | TX4927_PCIC_P2GMnGBASE_TMEMEN |
#ifdef __BIG_ENDIAN
	    TX4927_PCIC_P2GMnGBASE_TECHG
#else
	    TX4927_PCIC_P2GMnGBASE_TBSDIS
#endif
	    ;

	/* PCI->GB mappings (MEM 16MB) -not used */
	tx4927_pcicptr->p2gm1plbase = 0xffffffff;
	tx4927_pcicptr->p2gm1pubase = 0xffffffff;
	tx4927_pcicptr->p2gmgbase[1] = 0;

	/* PCI->GB mappings (MEM 1MB) -not used */
	tx4927_pcicptr->p2gm2pbase = 0xffffffff;
	tx4927_pcicptr->p2gmgbase[2] = 0;


	/* Enable Initiator Memory 0 Space, I/O Space, Config */
	tx4927_pcicptr->pciccfg &= TX4927_PCIC_PCICCFG_LBWC_MASK;
	tx4927_pcicptr->pciccfg |=
	    TX4927_PCIC_PCICCFG_IMSE0 | TX4927_PCIC_PCICCFG_IISE |
	    TX4927_PCIC_PCICCFG_ICAE | TX4927_PCIC_PCICCFG_ATR;


	/* Do not use MEMMUL, MEMINF: YMFPCI card causes M_ABORT. */
	tx4927_pcicptr->pcicfg1 = 0;

	if (tx4927_pcic_trdyto >= 0) {
		tx4927_pcicptr->g2ptocnt &= ~0xff;
		tx4927_pcicptr->g2ptocnt |= (tx4927_pcic_trdyto & 0xff);
	}

	/* Clear All Local Bus Status */
	tx4927_pcicptr->pcicstatus = TX4927_PCIC_PCICSTATUS_ALL;
	/* Enable All Local Bus Interrupts */
	tx4927_pcicptr->pcicmask = TX4927_PCIC_PCICSTATUS_ALL;
	/* Clear All Initiator Status */
	tx4927_pcicptr->g2pstatus = TX4927_PCIC_G2PSTATUS_ALL;
	/* Enable All Initiator Interrupts */
	tx4927_pcicptr->g2pmask = TX4927_PCIC_G2PSTATUS_ALL;
	/* Clear All PCI Status Error */
	tx4927_pcicptr->pcistatus =
	    (tx4927_pcicptr->pcistatus & 0x0000ffff) |
	    (TX4927_PCIC_PCISTATUS_ALL << 16);
	/* Enable All PCI Status Error Interrupts */
	tx4927_pcicptr->pcimask = TX4927_PCIC_PCISTATUS_ALL;

	/* PCIC Int => IRC IRQ16 */
	tx4927_pcicptr->pcicfg2 =
	    (tx4927_pcicptr->pcicfg2 & 0xffffff00) | TX4927_IR_PCIC;

	if (!(tx4927_ccfgptr->ccfg & TX4927_CCFG_PCIXARB)) {
		/* XXX */
	} else {
		/* Reset Bus Arbiter */
		tx4927_pcicptr->pbacfg = TX4927_PCIC_PBACFG_RPBA;
		/* Enable Bus Arbiter */
		tx4927_pcicptr->pbacfg = TX4927_PCIC_PBACFG_PBAEN;
	}

	tx4927_pcicptr->pcistatus = PCI_COMMAND_MASTER |
	    PCI_COMMAND_MEMORY |
	    PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
}
#endif /* CONFIG_PCI */

static void __noreturn wait_forever(void)
{
	while (1)
		if (cpu_wait)
			(*cpu_wait)();
}

void toshiba_rbtx4927_restart(char *command)
{
	printk(KERN_NOTICE "System Rebooting...\n");

	/* enable the s/w reset register */
	writeb(RBTX4927_SW_RESET_ENABLE_SET, RBTX4927_SW_RESET_ENABLE);

	/* wait for enable to be seen */
	while ((readb(RBTX4927_SW_RESET_ENABLE) &
		RBTX4927_SW_RESET_ENABLE_SET) == 0x00);

	/* do a s/w reset */
	writeb(RBTX4927_SW_RESET_DO_SET, RBTX4927_SW_RESET_DO);

	/* do something passive while waiting for reset */
	local_irq_disable();
	wait_forever();
	/* no return */
}

void toshiba_rbtx4927_halt(void)
{
	printk(KERN_NOTICE "System Halted\n");
	local_irq_disable();
	wait_forever();
	/* no return */
}

void toshiba_rbtx4927_power_off(void)
{
	toshiba_rbtx4927_halt();
	/* no return */
}

void __init plat_mem_setup(void)
{
	int i;
	u32 cp0_config;
	char *argptr;

	printk("CPU is %s\n", toshiba_name);

	/* f/w leaves this on at startup */
	clear_c0_status(ST0_ERL);

	/* enable caches -- HCP5 does this, pmon does not */
	cp0_config = read_c0_config();
	cp0_config = cp0_config & ~(TX49_CONF_IC | TX49_CONF_DC);
	write_c0_config(cp0_config);

	set_io_port_base(KSEG1 + TBTX4927_ISA_IO_OFFSET);

	ioport_resource.end = 0xffffffff;
	iomem_resource.end = 0xffffffff;

	_machine_restart = toshiba_rbtx4927_restart;
	_machine_halt = toshiba_rbtx4927_halt;
	pm_power_off = toshiba_rbtx4927_power_off;

	for (i = 0; i < TX4927_NR_TMR; i++)
		txx9_tmr_init(TX4927_TMR_REG(0) & 0xfffffffffULL);

#ifdef CONFIG_PCI

	/* PCIC */
	/*
	   * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
	   *
	   * For TX4927:
	   * PCIDIVMODE[12:11]'s initial value is given by S9[4:3] (ON:0, OFF:1).
	   * CPU 166MHz: PCI 66MHz : PCIDIVMODE: 00 (1/2.5)
	   * CPU 200MHz: PCI 66MHz : PCIDIVMODE: 01 (1/3)
	   * CPU 166MHz: PCI 33MHz : PCIDIVMODE: 10 (1/5)
	   * CPU 200MHz: PCI 33MHz : PCIDIVMODE: 11 (1/6)
	   * i.e. S9[3]: ON (83MHz), OFF (100MHz)
	   *
	   * For TX4937:
	   * PCIDIVMODE[12:11]'s initial value is given by S1[5:4] (ON:0, OFF:1)
	   * PCIDIVMODE[10] is 0.
	   * CPU 266MHz: PCI 33MHz : PCIDIVMODE: 000 (1/8)
	   * CPU 266MHz: PCI 66MHz : PCIDIVMODE: 001 (1/4)
	   * CPU 300MHz: PCI 33MHz : PCIDIVMODE: 010 (1/9)
	   * CPU 300MHz: PCI 66MHz : PCIDIVMODE: 011 (1/4.5)
	   * CPU 333MHz: PCI 33MHz : PCIDIVMODE: 100 (1/10)
	   * CPU 333MHz: PCI 66MHz : PCIDIVMODE: 101 (1/5)
	   *
	 */
	if (mips_machtype == MACH_TOSHIBA_RBTX4937)
		switch ((unsigned long)tx4927_ccfgptr->
			ccfg & TX4937_CCFG_PCIDIVMODE_MASK) {
		case TX4937_CCFG_PCIDIVMODE_8:
		case TX4937_CCFG_PCIDIVMODE_4:
			tx4927_cpu_clock = 266666666;	/* 266MHz */
			break;
		case TX4937_CCFG_PCIDIVMODE_9:
		case TX4937_CCFG_PCIDIVMODE_4_5:
			tx4927_cpu_clock = 300000000;	/* 300MHz */
			break;
		default:
			tx4927_cpu_clock = 333333333;	/* 333MHz */
		}
	else
		switch ((unsigned long)tx4927_ccfgptr->
			ccfg & TX4927_CCFG_PCIDIVMODE_MASK) {
		case TX4927_CCFG_PCIDIVMODE_2_5:
		case TX4927_CCFG_PCIDIVMODE_5:
			tx4927_cpu_clock = 166666666;	/* 166MHz */
			break;
		default:
			tx4927_cpu_clock = 200000000;	/* 200MHz */
		}

	/* CCFG */
	/* do reset on watchdog */
	tx4927_ccfgptr->ccfg |= TX4927_CCFG_WR;
	/* enable Timeout BusError */
	if (tx4927_ccfg_toeon)
		tx4927_ccfgptr->ccfg |= TX4927_CCFG_TOE;

	tx4927_pci_setup();
	if (tx4927_using_backplane == 1)
		printk("backplane board IS installed\n");
	else
		printk("No Backplane \n");

	/* this is on ISA bus behind PCI bus, so need PCI up first */
#ifdef CONFIG_TOSHIBA_FPCIB0
	if (tx4927_using_backplane) {
		smsc_fdc37m81x_init(0x3f0);
		smsc_fdc37m81x_config_beg();
		smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM,
					  SMSC_FDC37M81X_KBD);
		smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1);
		smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12);
		smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE,
					  1);
		smsc_fdc37m81x_config_end();
	}
#endif
#endif /* CONFIG_PCI */

#ifdef CONFIG_SERIAL_TXX9
	{
		extern int early_serial_txx9_setup(struct uart_port *port);
		struct uart_port req;
		for(i = 0; i < 2; i++) {
			memset(&req, 0, sizeof(req));
			req.line = i;
			req.iotype = UPIO_MEM;
			req.membase = (char *)(0xff1ff300 + i * 0x100);
			req.mapbase = 0xff1ff300 + i * 0x100;
			req.irq = TX4927_IRQ_PIC_BEG + 8 + i;
			req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
			req.uartclk = 50000000;
			early_serial_txx9_setup(&req);
		}
	}
#ifdef CONFIG_SERIAL_TXX9_CONSOLE
        argptr = prom_getcmdline();
        if (strstr(argptr, "console=") == NULL) {
                strcat(argptr, " console=ttyS0,38400");
        }
#endif
#endif

#ifdef CONFIG_ROOT_NFS
        argptr = prom_getcmdline();
        if (strstr(argptr, "root=") == NULL) {
                strcat(argptr, " root=/dev/nfs rw");
        }
#endif

#ifdef CONFIG_IP_PNP
        argptr = prom_getcmdline();
        if (strstr(argptr, "ip=") == NULL) {
                strcat(argptr, " ip=any");
        }
#endif
}

void __init plat_time_init(void)
{
	mips_hpt_frequency = tx4927_cpu_clock / 2;
	if (tx4927_ccfgptr->ccfg & TX4927_CCFG_TINTDIS)
		txx9_clockevent_init(TX4927_TMR_REG(0) & 0xfffffffffULL,
				     TXX9_IRQ_BASE + 17,
				     50000000);
}

static int __init toshiba_rbtx4927_rtc_init(void)
{
	static struct resource __initdata res = {
		.start	= 0x1c010000,
		.end	= 0x1c010000 + 0x800 - 1,
		.flags	= IORESOURCE_MEM,
	};
	struct platform_device *dev =
		platform_device_register_simple("rtc-ds1742", -1, &res, 1);
	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}
device_initcall(toshiba_rbtx4927_rtc_init);

static int __init rbtx4927_ne_init(void)
{
	static struct resource __initdata res[] = {
		{
			.start	= RBTX4927_RTL_8019_BASE,
			.end	= RBTX4927_RTL_8019_BASE + 0x20 - 1,
			.flags	= IORESOURCE_IO,
		}, {
			.start	= RBTX4927_RTL_8019_IRQ,
			.flags	= IORESOURCE_IRQ,
		}
	};
	struct platform_device *dev =
		platform_device_register_simple("ne", -1,
						res, ARRAY_SIZE(res));
	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}
device_initcall(rbtx4927_ne_init);

/* Watchdog support */

static int __init txx9_wdt_init(unsigned long base)
{
	struct resource res = {
		.start	= base,
		.end	= base + 0x100 - 1,
		.flags	= IORESOURCE_MEM,
	};
	struct platform_device *dev =
		platform_device_register_simple("txx9wdt", -1, &res, 1);
	return IS_ERR(dev) ? PTR_ERR(dev) : 0;
}

static int __init rbtx4927_wdt_init(void)
{
	return txx9_wdt_init(TX4927_TMR_REG(2) & 0xfffffffffULL);
}
device_initcall(rbtx4927_wdt_init);

/* Minimum CLK support */

struct clk *clk_get(struct device *dev, const char *id)
{
	if (!strcmp(id, "imbus_clk"))
		return (struct clk *)50000000;
	return ERR_PTR(-ENOENT);
}
EXPORT_SYMBOL(clk_get);

int clk_enable(struct clk *clk)
{
	return 0;
}
EXPORT_SYMBOL(clk_enable);

void clk_disable(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_disable);

unsigned long clk_get_rate(struct clk *clk)
{
	return (unsigned long)clk;
}
EXPORT_SYMBOL(clk_get_rate);

void clk_put(struct clk *clk)
{
}
EXPORT_SYMBOL(clk_put);