arch/mips/txx9/generic/setup_tx4939.c - LeafOS-Devices/android_kernel_samsung_universal7904 - Gitiles

 /*
  * TX4939 setup routines
  * Based on linux/arch/mips/txx9/generic/setup_tx4938.c,
  *	    and RBTX49xx patch from CELF patch archive.
  *
  * 2003-2005 (c) MontaVista Software, Inc.
  * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/delay.h>
 #include <linux/netdevice.h>
 #include <linux/notifier.h>
 #include <linux/sysdev.h>
 #include <linux/ethtool.h>
 #include <linux/param.h>
 #include <linux/ptrace.h>
 #include <linux/mtd/physmap.h>
 #include <linux/platform_device.h>
 #include <asm/bootinfo.h>
 #include <asm/reboot.h>
 #include <asm/traps.h>
 #include <asm/txx9irq.h>
 #include <asm/txx9tmr.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/tx4939.h>

 static void __init tx4939_wdr_init(void)
 {
 	/* report watchdog reset status */
 	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST)
 		pr_warning("Watchdog reset detected at 0x%lx\n",
 			   read_c0_errorepc());
 	/* clear WatchDogReset (W1C) */
 	tx4939_ccfg_set(TX4939_CCFG_WDRST);
 	/* do reset on watchdog */
 	tx4939_ccfg_set(TX4939_CCFG_WR);
 }

 void __init tx4939_wdt_init(void)
 {
 	txx9_wdt_init(TX4939_TMR_REG(2) & 0xfffffffffULL);
 }

 static void tx4939_machine_restart(char *command)
 {
 	local_irq_disable();
 	pr_emerg("Rebooting (with %s watchdog reset)...\n",
 		 (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) ?
 		 "external" : "internal");
 	/* clear watchdog status */
 	tx4939_ccfg_set(TX4939_CCFG_WDRST);	/* W1C */
 	txx9_wdt_now(TX4939_TMR_REG(2) & 0xfffffffffULL);
 	while (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST))
 		;
 	mdelay(10);
 	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) {
 		pr_emerg("Rebooting (with internal watchdog reset)...\n");
 		/* External WDRST failed.  Do internal watchdog reset */
 		tx4939_ccfg_clear(TX4939_CCFG_WDREXEN);
 	}
 	/* fallback */
 	(*_machine_halt)();
 }

 void show_registers(struct pt_regs *regs);
 static int tx4939_be_handler(struct pt_regs *regs, int is_fixup)
 {
 	int data = regs->cp0_cause & 4;
 	console_verbose();
 	pr_err("%cBE exception at %#lx\n",
 	       data ? 'D' : 'I', regs->cp0_epc);
 	pr_err("ccfg:%llx, toea:%llx\n",
 	       (unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
 	       (unsigned long long)____raw_readq(&tx4939_ccfgptr->toea));
 #ifdef CONFIG_PCI
 	tx4927_report_pcic_status();
 #endif
 	show_registers(regs);
 	panic("BusError!");
 }
 static void __init tx4939_be_init(void)
 {
 	board_be_handler = tx4939_be_handler;
 }

 static struct resource tx4939_sdram_resource[4];
 static struct resource tx4939_sram_resource;
 #define TX4939_SRAM_SIZE 0x800

 void __init tx4939_add_memory_regions(void)
 {
 	int i;
 	unsigned long start, size;
 	u64 win;

 	for (i = 0; i < 4; i++) {
 		if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
 			continue;
 		win = ____raw_readq(&tx4939_ddrcptr->win[i]);
 		start = (unsigned long)(win >> 48);
 		size = (((unsigned long)(win >> 32) & 0xffff) + 1) - start;
 		add_memory_region(start << 20, size << 20, BOOT_MEM_RAM);
 	}
 }

 void __init tx4939_setup(void)
 {
 	int i;
 	__u32 divmode;
 	__u64 pcfg;
 	int cpuclk = 0;

 	txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE,
 			  TX4939_REG_SIZE);
 	set_c0_config(TX49_CONF_CWFON);

 	/* SDRAMC,EBUSC are configured by PROM */
 	for (i = 0; i < 4; i++) {
 		if (!(TX4939_EBUSC_CR(i) & 0x8))
 			continue;	/* disabled */
 		txx9_ce_res[i].start = (unsigned long)TX4939_EBUSC_BA(i);
 		txx9_ce_res[i].end =
 			txx9_ce_res[i].start + TX4939_EBUSC_SIZE(i) - 1;
 		request_resource(&iomem_resource, &txx9_ce_res[i]);
 	}

 	/* clocks */
 	if (txx9_master_clock) {
 		/* calculate cpu_clock from master_clock */
 		divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
 			TX4939_CCFG_MULCLK_MASK;
 		cpuclk = txx9_master_clock * 20 / 2;
 		switch (divmode) {
 		case TX4939_CCFG_MULCLK_8:
 			cpuclk = cpuclk / 3 * 4 /* / 6 *  8 */; break;
 		case TX4939_CCFG_MULCLK_9:
 			cpuclk = cpuclk / 2 * 3 /* / 6 *  9 */; break;
 		case TX4939_CCFG_MULCLK_10:
 			cpuclk = cpuclk / 3 * 5 /* / 6 * 10 */; break;
 		case TX4939_CCFG_MULCLK_11:
 			cpuclk = cpuclk / 6 * 11; break;
 		case TX4939_CCFG_MULCLK_12:
 			cpuclk = cpuclk * 2 /* / 6 * 12 */; break;
 		case TX4939_CCFG_MULCLK_13:
 			cpuclk = cpuclk / 6 * 13; break;
 		case TX4939_CCFG_MULCLK_14:
 			cpuclk = cpuclk / 3 * 7 /* / 6 * 14 */; break;
 		case TX4939_CCFG_MULCLK_15:
 			cpuclk = cpuclk / 2 * 5 /* / 6 * 15 */; break;
 		}
 		txx9_cpu_clock = cpuclk;
 	} else {
 		if (txx9_cpu_clock == 0)
 			txx9_cpu_clock = 400000000;	/* 400MHz */
 		/* calculate master_clock from cpu_clock */
 		cpuclk = txx9_cpu_clock;
 		divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
 			TX4939_CCFG_MULCLK_MASK;
 		switch (divmode) {
 		case TX4939_CCFG_MULCLK_8:
 			txx9_master_clock = cpuclk * 6 / 8; break;
 		case TX4939_CCFG_MULCLK_9:
 			txx9_master_clock = cpuclk * 6 / 9; break;
 		case TX4939_CCFG_MULCLK_10:
 			txx9_master_clock = cpuclk * 6 / 10; break;
 		case TX4939_CCFG_MULCLK_11:
 			txx9_master_clock = cpuclk * 6 / 11; break;
 		case TX4939_CCFG_MULCLK_12:
 			txx9_master_clock = cpuclk * 6 / 12; break;
 		case TX4939_CCFG_MULCLK_13:
 			txx9_master_clock = cpuclk * 6 / 13; break;
 		case TX4939_CCFG_MULCLK_14:
 			txx9_master_clock = cpuclk * 6 / 14; break;
 		case TX4939_CCFG_MULCLK_15:
 			txx9_master_clock = cpuclk * 6 / 15; break;
 		}
 		txx9_master_clock /= 10; /* * 2 / 20 */
 	}
 	/* calculate gbus_clock from cpu_clock */
 	divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
 		TX4939_CCFG_YDIVMODE_MASK;
 	txx9_gbus_clock = txx9_cpu_clock;
 	switch (divmode) {
 	case TX4939_CCFG_YDIVMODE_2:
 		txx9_gbus_clock /= 2; break;
 	case TX4939_CCFG_YDIVMODE_3:
 		txx9_gbus_clock /= 3; break;
 	case TX4939_CCFG_YDIVMODE_5:
 		txx9_gbus_clock /= 5; break;
 	case TX4939_CCFG_YDIVMODE_6:
 		txx9_gbus_clock /= 6; break;
 	}
 	/* change default value to udelay/mdelay take reasonable time */
 	loops_per_jiffy = txx9_cpu_clock / HZ / 2;

 	/* CCFG */
 	tx4939_wdr_init();
 	/* clear BusErrorOnWrite flag (W1C) */
 	tx4939_ccfg_set(TX4939_CCFG_WDRST | TX4939_CCFG_BEOW);
 	/* enable Timeout BusError */
 	if (txx9_ccfg_toeon)
 		tx4939_ccfg_set(TX4939_CCFG_TOE);

 	/* DMA selection */
 	txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_DMASEL_ALL);

 	/* Use external clock for external arbiter */
 	if (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCIARB))
 		txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_PCICLKEN_ALL);

 	pr_info("%s -- %dMHz(M%dMHz,G%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
 		txx9_pcode_str,
 		(cpuclk + 500000) / 1000000,
 		(txx9_master_clock + 500000) / 1000000,
 		(txx9_gbus_clock + 500000) / 1000000,
 		(__u32)____raw_readq(&tx4939_ccfgptr->crir),
 		(unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
 		(unsigned long long)____raw_readq(&tx4939_ccfgptr->pcfg));

 	pr_info("%s DDRC -- EN:%08x", txx9_pcode_str,
 		(__u32)____raw_readq(&tx4939_ddrcptr->winen));
 	for (i = 0; i < 4; i++) {
 		__u64 win = ____raw_readq(&tx4939_ddrcptr->win[i]);
 		if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
 			continue;	/* disabled */
 		printk(KERN_CONT " #%d:%016llx", i, (unsigned long long)win);
 		tx4939_sdram_resource[i].name = "DDR SDRAM";
 		tx4939_sdram_resource[i].start =
 			(unsigned long)(win >> 48) << 20;
 		tx4939_sdram_resource[i].end =
 			((((unsigned long)(win >> 32) & 0xffff) + 1) <<
 			 20) - 1;
 		tx4939_sdram_resource[i].flags = IORESOURCE_MEM;
 		request_resource(&iomem_resource, &tx4939_sdram_resource[i]);
 	}
 	printk(KERN_CONT "\n");

 	/* SRAM */
 	if (____raw_readq(&tx4939_sramcptr->cr) & 1) {
 		unsigned int size = TX4939_SRAM_SIZE;
 		tx4939_sram_resource.name = "SRAM";
 		tx4939_sram_resource.start =
 			(____raw_readq(&tx4939_sramcptr->cr) >> (39-11))
 			& ~(size - 1);
 		tx4939_sram_resource.end =
 			tx4939_sram_resource.start + TX4939_SRAM_SIZE - 1;
 		tx4939_sram_resource.flags = IORESOURCE_MEM;
 		request_resource(&iomem_resource, &tx4939_sram_resource);
 	}

 	/* TMR */
 	/* disable all timers */
 	for (i = 0; i < TX4939_NR_TMR; i++)
 		txx9_tmr_init(TX4939_TMR_REG(i) & 0xfffffffffULL);

 	/* DMA */
 	for (i = 0; i < 2; i++)
 		____raw_writeq(TX4938_DMA_MCR_MSTEN,
 			       (void __iomem *)(TX4939_DMA_REG(i) + 0x50));

 	/* set PCIC1 reset (required to prevent hangup on BIST) */
 	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
 	pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
 	if (pcfg & (TX4939_PCFG_ET0MODE | TX4939_PCFG_ET1MODE)) {
 		mdelay(1);	/* at least 128 cpu clock */
 		/* clear PCIC1 reset */
 		txx9_clear64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
 	} else {
 		pr_info("%s: stop PCIC1\n", txx9_pcode_str);
 		/* stop PCIC1 */
 		txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1CKD);
 	}
 	if (!(pcfg & TX4939_PCFG_ET0MODE)) {
 		pr_info("%s: stop ETH0\n", txx9_pcode_str);
 		txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0RST);
 		txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0CKD);
 	}
 	if (!(pcfg & TX4939_PCFG_ET1MODE)) {
 		pr_info("%s: stop ETH1\n", txx9_pcode_str);
 		txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1RST);
 		txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1CKD);
 	}

 	_machine_restart = tx4939_machine_restart;
 	board_be_init = tx4939_be_init;
 }

 void __init tx4939_time_init(unsigned int tmrnr)
 {
 	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_TINTDIS)
 		txx9_clockevent_init(TX4939_TMR_REG(tmrnr) & 0xfffffffffULL,
 				     TXX9_IRQ_BASE + TX4939_IR_TMR(tmrnr),
 				     TXX9_IMCLK);
 }

 void __init tx4939_sio_init(unsigned int sclk, unsigned int cts_mask)
 {
 	int i;
 	unsigned int ch_mask = 0;
 	__u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

 	cts_mask |= ~1;	/* only SIO0 have RTS/CTS */
 	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO0)
 		cts_mask |= 1 << 0; /* disable SIO0 RTS/CTS by PCFG setting */
 	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2)
 		ch_mask |= 1 << 2; /* disable SIO2 by PCFG setting */
 	if (pcfg & TX4939_PCFG_SIO3MODE)
 		ch_mask |= 1 << 3; /* disable SIO3 by PCFG setting */
 	for (i = 0; i < 4; i++) {
 		if ((1 << i) & ch_mask)
 			continue;
 		txx9_sio_init(TX4939_SIO_REG(i) & 0xfffffffffULL,
 			      TXX9_IRQ_BASE + TX4939_IR_SIO(i),
 			      i, sclk, (1 << i) & cts_mask);
 	}
 }

 #if defined(CONFIG_TC35815) || defined(CONFIG_TC35815_MODULE)
 static int tx4939_get_eth_speed(struct net_device *dev)
 {
 	struct ethtool_cmd cmd = { ETHTOOL_GSET };
 	int speed = 100;	/* default 100Mbps */
 	int err;
 	if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
 		return speed;
 	err = dev->ethtool_ops->get_settings(dev, &cmd);
 	if (err < 0)
 		return speed;
 	speed = cmd.speed == SPEED_100 ? 100 : 10;
 	return speed;
 }
 static int tx4939_netdev_event(struct notifier_block *this,
 			       unsigned long event,
 			       void *ptr)
 {
 	struct net_device *dev = ptr;
 	if (event == NETDEV_CHANGE && netif_carrier_ok(dev)) {
 		__u64 bit = 0;
 		if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(0))
 			bit = TX4939_PCFG_SPEED0;
 		else if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(1))
 			bit = TX4939_PCFG_SPEED1;
 		if (bit) {
 			int speed = tx4939_get_eth_speed(dev);
 			if (speed == 100)
 				txx9_set64(&tx4939_ccfgptr->pcfg, bit);
 			else
 				txx9_clear64(&tx4939_ccfgptr->pcfg, bit);
 		}
 	}
 	return NOTIFY_DONE;
 }

 static struct notifier_block tx4939_netdev_notifier = {
 	.notifier_call = tx4939_netdev_event,
 	.priority = 1,
 };

 void __init tx4939_ethaddr_init(unsigned char *addr0, unsigned char *addr1)
 {
 	u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

 	if (addr0 && (pcfg & TX4939_PCFG_ET0MODE))
 		txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(0), addr0);
 	if (addr1 && (pcfg & TX4939_PCFG_ET1MODE))
 		txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(1), addr1);
 	register_netdevice_notifier(&tx4939_netdev_notifier);
 }
 #else
 void __init tx4939_ethaddr_init(unsigned char *addr0, unsigned char *addr1)
 {
 }
 #endif

 void __init tx4939_mtd_init(int ch)
 {
 	struct physmap_flash_data pdata = {
 		.width = TX4939_EBUSC_WIDTH(ch) / 8,
 	};
 	unsigned long start = txx9_ce_res[ch].start;
 	unsigned long size = txx9_ce_res[ch].end - start + 1;

 	if (!(TX4939_EBUSC_CR(ch) & 0x8))
 		return;	/* disabled */
 	txx9_physmap_flash_init(ch, start, size, &pdata);
 }

 #define TX4939_ATA_REG_PHYS(ch) (TX4939_ATA_REG(ch) & 0xfffffffffULL)
 void __init tx4939_ata_init(void)
 {
 	static struct resource ata0_res[] = {
 		{
 			.start = TX4939_ATA_REG_PHYS(0),
 			.end = TX4939_ATA_REG_PHYS(0) + 0x1000 - 1,
 			.flags = IORESOURCE_MEM,
 		}, {
 			.start = TXX9_IRQ_BASE + TX4939_IR_ATA(0),
 			.flags = IORESOURCE_IRQ,
 		},
 	};
 	static struct resource ata1_res[] = {
 		{
 			.start = TX4939_ATA_REG_PHYS(1),
 			.end = TX4939_ATA_REG_PHYS(1) + 0x1000 - 1,
 			.flags = IORESOURCE_MEM,
 		}, {
 			.start = TXX9_IRQ_BASE + TX4939_IR_ATA(1),
 			.flags = IORESOURCE_IRQ,
 		},
 	};
 	static struct platform_device ata0_dev = {
 		.name = "tx4939ide",
 		.id = 0,
 		.num_resources = ARRAY_SIZE(ata0_res),
 		.resource = ata0_res,
 	};
 	static struct platform_device ata1_dev = {
 		.name = "tx4939ide",
 		.id = 1,
 		.num_resources = ARRAY_SIZE(ata1_res),
 		.resource = ata1_res,
 	};
 	__u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

 	if (pcfg & TX4939_PCFG_ATA0MODE)
 		platform_device_register(&ata0_dev);
 	if ((pcfg & (TX4939_PCFG_ATA1MODE |
 		     TX4939_PCFG_ET1MODE |
 		     TX4939_PCFG_ET0MODE)) == TX4939_PCFG_ATA1MODE)
 		platform_device_register(&ata1_dev);
 }

 static void __init tx4939_stop_unused_modules(void)
 {
 	__u64 pcfg, rst = 0, ckd = 0;
 	char buf[128];

 	buf[0] = '\0';
 	local_irq_disable();
 	pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
 	if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
 	    TX4939_PCFG_I2SMODE_ACLC) {
 		rst |= TX4939_CLKCTR_ACLRST;
 		ckd |= TX4939_CLKCTR_ACLCKD;
 		strcat(buf, " ACLC");
 	}
 	if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
 	    TX4939_PCFG_I2SMODE_I2S &&
 	    (pcfg & TX4939_PCFG_I2SMODE_MASK) !=
 	    TX4939_PCFG_I2SMODE_I2S_ALT) {
 		rst |= TX4939_CLKCTR_I2SRST;
 		ckd |= TX4939_CLKCTR_I2SCKD;
 		strcat(buf, " I2S");
 	}
 	if (!(pcfg & TX4939_PCFG_ATA0MODE)) {
 		rst |= TX4939_CLKCTR_ATA0RST;
 		ckd |= TX4939_CLKCTR_ATA0CKD;
 		strcat(buf, " ATA0");
 	}
 	if (!(pcfg & TX4939_PCFG_ATA1MODE)) {
 		rst |= TX4939_CLKCTR_ATA1RST;
 		ckd |= TX4939_CLKCTR_ATA1CKD;
 		strcat(buf, " ATA1");
 	}
 	if (pcfg & TX4939_PCFG_SPIMODE) {
 		rst |= TX4939_CLKCTR_SPIRST;
 		ckd |= TX4939_CLKCTR_SPICKD;
 		strcat(buf, " SPI");
 	}
 	if (!(pcfg & (TX4939_PCFG_VSSMODE | TX4939_PCFG_VPSMODE))) {
 		rst |= TX4939_CLKCTR_VPCRST;
 		ckd |= TX4939_CLKCTR_VPCCKD;
 		strcat(buf, " VPC");
 	}
 	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2) {
 		rst |= TX4939_CLKCTR_SIO2RST;
 		ckd |= TX4939_CLKCTR_SIO2CKD;
 		strcat(buf, " SIO2");
 	}
 	if (pcfg & TX4939_PCFG_SIO3MODE) {
 		rst |= TX4939_CLKCTR_SIO3RST;
 		ckd |= TX4939_CLKCTR_SIO3CKD;
 		strcat(buf, " SIO3");
 	}
 	if (rst | ckd) {
 		txx9_set64(&tx4939_ccfgptr->clkctr, rst);
 		txx9_set64(&tx4939_ccfgptr->clkctr, ckd);
 	}
 	local_irq_enable();
 	if (buf[0])
 		pr_info("%s: stop%s\n", txx9_pcode_str, buf);
 }

 static int __init tx4939_late_init(void)
 {
 	if (txx9_pcode != 0x4939)
 		return -ENODEV;
 	tx4939_stop_unused_modules();
 	return 0;
 }
 late_initcall(tx4939_late_init);
	/*
	* TX4939 setup routines
	* Based on linux/arch/mips/txx9/generic/setup_tx4938.c,
	* and RBTX49xx patch from CELF patch archive.
	*
	* 2003-2005 (c) MontaVista Software, Inc.
	* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
	*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*/
	#include <linux/init.h>
	#include <linux/ioport.h>
	#include <linux/delay.h>
	#include <linux/netdevice.h>
	#include <linux/notifier.h>
	#include <linux/sysdev.h>
	#include <linux/ethtool.h>
	#include <linux/param.h>
	#include <linux/ptrace.h>
	#include <linux/mtd/physmap.h>
	#include <linux/platform_device.h>
	#include <asm/bootinfo.h>
	#include <asm/reboot.h>
	#include <asm/traps.h>
	#include <asm/txx9irq.h>
	#include <asm/txx9tmr.h>
	#include <asm/txx9/generic.h>
	#include <asm/txx9/tx4939.h>

	static void __init tx4939_wdr_init(void)
	{
	/* report watchdog reset status */
	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST)
	pr_warning("Watchdog reset detected at 0x%lx\n",
	read_c0_errorepc());
	/* clear WatchDogReset (W1C) */
	tx4939_ccfg_set(TX4939_CCFG_WDRST);
	/* do reset on watchdog */
	tx4939_ccfg_set(TX4939_CCFG_WR);
	}

	void __init tx4939_wdt_init(void)
	{
	txx9_wdt_init(TX4939_TMR_REG(2) & 0xfffffffffULL);
	}

	static void tx4939_machine_restart(char *command)
	{
	local_irq_disable();
	pr_emerg("Rebooting (with %s watchdog reset)...\n",
	(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) ?
	"external" : "internal");
	/* clear watchdog status */
	tx4939_ccfg_set(TX4939_CCFG_WDRST); /* W1C */
	txx9_wdt_now(TX4939_TMR_REG(2) & 0xfffffffffULL);
	while (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDRST))
	;
	mdelay(10);
	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_WDREXEN) {
	pr_emerg("Rebooting (with internal watchdog reset)...\n");
	/* External WDRST failed. Do internal watchdog reset */
	tx4939_ccfg_clear(TX4939_CCFG_WDREXEN);
	}
	/* fallback */
	(*_machine_halt)();
	}

	void show_registers(struct pt_regs *regs);
	static int tx4939_be_handler(struct pt_regs *regs, int is_fixup)
	{
	int data = regs->cp0_cause & 4;
	console_verbose();
	pr_err("%cBE exception at %#lx\n",
	data ? 'D' : 'I', regs->cp0_epc);
	pr_err("ccfg:%llx, toea:%llx\n",
	(unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
	(unsigned long long)____raw_readq(&tx4939_ccfgptr->toea));
	#ifdef CONFIG_PCI
	tx4927_report_pcic_status();
	#endif
	show_registers(regs);
	panic("BusError!");
	}
	static void __init tx4939_be_init(void)
	{
	board_be_handler = tx4939_be_handler;
	}

	static struct resource tx4939_sdram_resource[4];
	static struct resource tx4939_sram_resource;
	#define TX4939_SRAM_SIZE 0x800

	void __init tx4939_add_memory_regions(void)
	{
	int i;
	unsigned long start, size;
	u64 win;

	for (i = 0; i < 4; i++) {
	if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
	continue;
	win = ____raw_readq(&tx4939_ddrcptr->win[i]);
	start = (unsigned long)(win >> 48);
	size = (((unsigned long)(win >> 32) & 0xffff) + 1) - start;
	add_memory_region(start << 20, size << 20, BOOT_MEM_RAM);
	}
	}

	void __init tx4939_setup(void)
	{
	int i;
	__u32 divmode;
	__u64 pcfg;
	int cpuclk = 0;

	txx9_reg_res_init(TX4939_REV_PCODE(), TX4939_REG_BASE,
	TX4939_REG_SIZE);
	set_c0_config(TX49_CONF_CWFON);

	/* SDRAMC,EBUSC are configured by PROM */
	for (i = 0; i < 4; i++) {
	if (!(TX4939_EBUSC_CR(i) & 0x8))
	continue; /* disabled */
	txx9_ce_res[i].start = (unsigned long)TX4939_EBUSC_BA(i);
	txx9_ce_res[i].end =
	txx9_ce_res[i].start + TX4939_EBUSC_SIZE(i) - 1;
	request_resource(&iomem_resource, &txx9_ce_res[i]);
	}

	/* clocks */
	if (txx9_master_clock) {
	/* calculate cpu_clock from master_clock */
	divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
	TX4939_CCFG_MULCLK_MASK;
	cpuclk = txx9_master_clock * 20 / 2;
	switch (divmode) {
	case TX4939_CCFG_MULCLK_8:
	cpuclk = cpuclk / 3 * 4 /* / 6 * 8 */; break;
	case TX4939_CCFG_MULCLK_9:
	cpuclk = cpuclk / 2 * 3 /* / 6 * 9 */; break;
	case TX4939_CCFG_MULCLK_10:
	cpuclk = cpuclk / 3 * 5 /* / 6 * 10 */; break;
	case TX4939_CCFG_MULCLK_11:
	cpuclk = cpuclk / 6 * 11; break;
	case TX4939_CCFG_MULCLK_12:
	cpuclk = cpuclk * 2 /* / 6 * 12 */; break;
	case TX4939_CCFG_MULCLK_13:
	cpuclk = cpuclk / 6 * 13; break;
	case TX4939_CCFG_MULCLK_14:
	cpuclk = cpuclk / 3 * 7 /* / 6 * 14 */; break;
	case TX4939_CCFG_MULCLK_15:
	cpuclk = cpuclk / 2 * 5 /* / 6 * 15 */; break;
	}
	txx9_cpu_clock = cpuclk;
	} else {
	if (txx9_cpu_clock == 0)
	txx9_cpu_clock = 400000000; /* 400MHz */
	/* calculate master_clock from cpu_clock */
	cpuclk = txx9_cpu_clock;
	divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
	TX4939_CCFG_MULCLK_MASK;
	switch (divmode) {
	case TX4939_CCFG_MULCLK_8:
	txx9_master_clock = cpuclk * 6 / 8; break;
	case TX4939_CCFG_MULCLK_9:
	txx9_master_clock = cpuclk * 6 / 9; break;
	case TX4939_CCFG_MULCLK_10:
	txx9_master_clock = cpuclk * 6 / 10; break;
	case TX4939_CCFG_MULCLK_11:
	txx9_master_clock = cpuclk * 6 / 11; break;
	case TX4939_CCFG_MULCLK_12:
	txx9_master_clock = cpuclk * 6 / 12; break;
	case TX4939_CCFG_MULCLK_13:
	txx9_master_clock = cpuclk * 6 / 13; break;
	case TX4939_CCFG_MULCLK_14:
	txx9_master_clock = cpuclk * 6 / 14; break;
	case TX4939_CCFG_MULCLK_15:
	txx9_master_clock = cpuclk * 6 / 15; break;
	}
	txx9_master_clock /= 10; /* * 2 / 20 */
	}
	/* calculate gbus_clock from cpu_clock */
	divmode = (__u32)____raw_readq(&tx4939_ccfgptr->ccfg) &
	TX4939_CCFG_YDIVMODE_MASK;
	txx9_gbus_clock = txx9_cpu_clock;
	switch (divmode) {
	case TX4939_CCFG_YDIVMODE_2:
	txx9_gbus_clock /= 2; break;
	case TX4939_CCFG_YDIVMODE_3:
	txx9_gbus_clock /= 3; break;
	case TX4939_CCFG_YDIVMODE_5:
	txx9_gbus_clock /= 5; break;
	case TX4939_CCFG_YDIVMODE_6:
	txx9_gbus_clock /= 6; break;
	}
	/* change default value to udelay/mdelay take reasonable time */
	loops_per_jiffy = txx9_cpu_clock / HZ / 2;

	/* CCFG */
	tx4939_wdr_init();
	/* clear BusErrorOnWrite flag (W1C) */
	tx4939_ccfg_set(TX4939_CCFG_WDRST \| TX4939_CCFG_BEOW);
	/* enable Timeout BusError */
	if (txx9_ccfg_toeon)
	tx4939_ccfg_set(TX4939_CCFG_TOE);

	/* DMA selection */
	txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_DMASEL_ALL);

	/* Use external clock for external arbiter */
	if (!(____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCIARB))
	txx9_clear64(&tx4939_ccfgptr->pcfg, TX4939_PCFG_PCICLKEN_ALL);

	pr_info("%s -- %dMHz(M%dMHz,G%dMHz) CRIR:%08x CCFG:%llx PCFG:%llx\n",
	txx9_pcode_str,
	(cpuclk + 500000) / 1000000,
	(txx9_master_clock + 500000) / 1000000,
	(txx9_gbus_clock + 500000) / 1000000,
	(__u32)____raw_readq(&tx4939_ccfgptr->crir),
	(unsigned long long)____raw_readq(&tx4939_ccfgptr->ccfg),
	(unsigned long long)____raw_readq(&tx4939_ccfgptr->pcfg));

	pr_info("%s DDRC -- EN:%08x", txx9_pcode_str,
	(__u32)____raw_readq(&tx4939_ddrcptr->winen));
	for (i = 0; i < 4; i++) {
	__u64 win = ____raw_readq(&tx4939_ddrcptr->win[i]);
	if (!((__u32)____raw_readq(&tx4939_ddrcptr->winen) & (1 << i)))
	continue; /* disabled */
	printk(KERN_CONT " #%d:%016llx", i, (unsigned long long)win);
	tx4939_sdram_resource[i].name = "DDR SDRAM";
	tx4939_sdram_resource[i].start =
	(unsigned long)(win >> 48) << 20;
	tx4939_sdram_resource[i].end =
	((((unsigned long)(win >> 32) & 0xffff) + 1) <<
	20) - 1;
	tx4939_sdram_resource[i].flags = IORESOURCE_MEM;
	request_resource(&iomem_resource, &tx4939_sdram_resource[i]);
	}
	printk(KERN_CONT "\n");

	/* SRAM */
	if (____raw_readq(&tx4939_sramcptr->cr) & 1) {
	unsigned int size = TX4939_SRAM_SIZE;
	tx4939_sram_resource.name = "SRAM";
	tx4939_sram_resource.start =
	(____raw_readq(&tx4939_sramcptr->cr) >> (39-11))
	& ~(size - 1);
	tx4939_sram_resource.end =
	tx4939_sram_resource.start + TX4939_SRAM_SIZE - 1;
	tx4939_sram_resource.flags = IORESOURCE_MEM;
	request_resource(&iomem_resource, &tx4939_sram_resource);
	}

	/* TMR */
	/* disable all timers */
	for (i = 0; i < TX4939_NR_TMR; i++)
	txx9_tmr_init(TX4939_TMR_REG(i) & 0xfffffffffULL);

	/* DMA */
	for (i = 0; i < 2; i++)
	____raw_writeq(TX4938_DMA_MCR_MSTEN,
	(void __iomem *)(TX4939_DMA_REG(i) + 0x50));

	/* set PCIC1 reset (required to prevent hangup on BIST) */
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
	pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
	if (pcfg & (TX4939_PCFG_ET0MODE \| TX4939_PCFG_ET1MODE)) {
	mdelay(1); /* at least 128 cpu clock */
	/* clear PCIC1 reset */
	txx9_clear64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
	} else {
	pr_info("%s: stop PCIC1\n", txx9_pcode_str);
	/* stop PCIC1 */
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1CKD);
	}
	if (!(pcfg & TX4939_PCFG_ET0MODE)) {
	pr_info("%s: stop ETH0\n", txx9_pcode_str);
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0RST);
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH0CKD);
	}
	if (!(pcfg & TX4939_PCFG_ET1MODE)) {
	pr_info("%s: stop ETH1\n", txx9_pcode_str);
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1RST);
	txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_ETH1CKD);
	}

	_machine_restart = tx4939_machine_restart;
	board_be_init = tx4939_be_init;
	}

	void __init tx4939_time_init(unsigned int tmrnr)
	{
	if (____raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_TINTDIS)
	txx9_clockevent_init(TX4939_TMR_REG(tmrnr) & 0xfffffffffULL,
	TXX9_IRQ_BASE + TX4939_IR_TMR(tmrnr),
	TXX9_IMCLK);
	}

	void __init tx4939_sio_init(unsigned int sclk, unsigned int cts_mask)
	{
	int i;
	unsigned int ch_mask = 0;
	__u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

	cts_mask \|= ~1; /* only SIO0 have RTS/CTS */
	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO0)
	cts_mask \|= 1 << 0; /* disable SIO0 RTS/CTS by PCFG setting */
	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2)
	ch_mask \|= 1 << 2; /* disable SIO2 by PCFG setting */
	if (pcfg & TX4939_PCFG_SIO3MODE)
	ch_mask \|= 1 << 3; /* disable SIO3 by PCFG setting */
	for (i = 0; i < 4; i++) {
	if ((1 << i) & ch_mask)
	continue;
	txx9_sio_init(TX4939_SIO_REG(i) & 0xfffffffffULL,
	TXX9_IRQ_BASE + TX4939_IR_SIO(i),
	i, sclk, (1 << i) & cts_mask);
	}
	}

	#if defined(CONFIG_TC35815) \|\| defined(CONFIG_TC35815_MODULE)
	static int tx4939_get_eth_speed(struct net_device *dev)
	{
	struct ethtool_cmd cmd = { ETHTOOL_GSET };
	int speed = 100; /* default 100Mbps */
	int err;
	if (!dev->ethtool_ops \|\| !dev->ethtool_ops->get_settings)
	return speed;
	err = dev->ethtool_ops->get_settings(dev, &cmd);
	if (err < 0)
	return speed;
	speed = cmd.speed == SPEED_100 ? 100 : 10;
	return speed;
	}
	static int tx4939_netdev_event(struct notifier_block *this,
	unsigned long event,
	void *ptr)
	{
	struct net_device *dev = ptr;
	if (event == NETDEV_CHANGE && netif_carrier_ok(dev)) {
	__u64 bit = 0;
	if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(0))
	bit = TX4939_PCFG_SPEED0;
	else if (dev->irq == TXX9_IRQ_BASE + TX4939_IR_ETH(1))
	bit = TX4939_PCFG_SPEED1;
	if (bit) {
	int speed = tx4939_get_eth_speed(dev);
	if (speed == 100)
	txx9_set64(&tx4939_ccfgptr->pcfg, bit);
	else
	txx9_clear64(&tx4939_ccfgptr->pcfg, bit);
	}
	}
	return NOTIFY_DONE;
	}

	static struct notifier_block tx4939_netdev_notifier = {
	.notifier_call = tx4939_netdev_event,
	.priority = 1,
	};

	void __init tx4939_ethaddr_init(unsigned char addr0, unsigned char addr1)
	{
	u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

	if (addr0 && (pcfg & TX4939_PCFG_ET0MODE))
	txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(0), addr0);
	if (addr1 && (pcfg & TX4939_PCFG_ET1MODE))
	txx9_ethaddr_init(TXX9_IRQ_BASE + TX4939_IR_ETH(1), addr1);
	register_netdevice_notifier(&tx4939_netdev_notifier);
	}
	#else
	void __init tx4939_ethaddr_init(unsigned char addr0, unsigned char addr1)
	{
	}
	#endif

	void __init tx4939_mtd_init(int ch)
	{
	struct physmap_flash_data pdata = {
	.width = TX4939_EBUSC_WIDTH(ch) / 8,
	};
	unsigned long start = txx9_ce_res[ch].start;
	unsigned long size = txx9_ce_res[ch].end - start + 1;

	if (!(TX4939_EBUSC_CR(ch) & 0x8))
	return; /* disabled */
	txx9_physmap_flash_init(ch, start, size, &pdata);
	}

	#define TX4939_ATA_REG_PHYS(ch) (TX4939_ATA_REG(ch) & 0xfffffffffULL)
	void __init tx4939_ata_init(void)
	{
	static struct resource ata0_res[] = {
	{
	.start = TX4939_ATA_REG_PHYS(0),
	.end = TX4939_ATA_REG_PHYS(0) + 0x1000 - 1,
	.flags = IORESOURCE_MEM,
	}, {
	.start = TXX9_IRQ_BASE + TX4939_IR_ATA(0),
	.flags = IORESOURCE_IRQ,
	},
	};
	static struct resource ata1_res[] = {
	{
	.start = TX4939_ATA_REG_PHYS(1),
	.end = TX4939_ATA_REG_PHYS(1) + 0x1000 - 1,
	.flags = IORESOURCE_MEM,
	}, {
	.start = TXX9_IRQ_BASE + TX4939_IR_ATA(1),
	.flags = IORESOURCE_IRQ,
	},
	};
	static struct platform_device ata0_dev = {
	.name = "tx4939ide",
	.id = 0,
	.num_resources = ARRAY_SIZE(ata0_res),
	.resource = ata0_res,
	};
	static struct platform_device ata1_dev = {
	.name = "tx4939ide",
	.id = 1,
	.num_resources = ARRAY_SIZE(ata1_res),
	.resource = ata1_res,
	};
	__u64 pcfg = __raw_readq(&tx4939_ccfgptr->pcfg);

	if (pcfg & TX4939_PCFG_ATA0MODE)
	platform_device_register(&ata0_dev);
	if ((pcfg & (TX4939_PCFG_ATA1MODE \|
	TX4939_PCFG_ET1MODE \|
	TX4939_PCFG_ET0MODE)) == TX4939_PCFG_ATA1MODE)
	platform_device_register(&ata1_dev);
	}

	static void __init tx4939_stop_unused_modules(void)
	{
	__u64 pcfg, rst = 0, ckd = 0;
	char buf[128];

	buf[0] = '\0';
	local_irq_disable();
	pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
	if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
	TX4939_PCFG_I2SMODE_ACLC) {
	rst \|= TX4939_CLKCTR_ACLRST;
	ckd \|= TX4939_CLKCTR_ACLCKD;
	strcat(buf, " ACLC");
	}
	if ((pcfg & TX4939_PCFG_I2SMODE_MASK) !=
	TX4939_PCFG_I2SMODE_I2S &&
	(pcfg & TX4939_PCFG_I2SMODE_MASK) !=
	TX4939_PCFG_I2SMODE_I2S_ALT) {
	rst \|= TX4939_CLKCTR_I2SRST;
	ckd \|= TX4939_CLKCTR_I2SCKD;
	strcat(buf, " I2S");
	}
	if (!(pcfg & TX4939_PCFG_ATA0MODE)) {
	rst \|= TX4939_CLKCTR_ATA0RST;
	ckd \|= TX4939_CLKCTR_ATA0CKD;
	strcat(buf, " ATA0");
	}
	if (!(pcfg & TX4939_PCFG_ATA1MODE)) {
	rst \|= TX4939_CLKCTR_ATA1RST;
	ckd \|= TX4939_CLKCTR_ATA1CKD;
	strcat(buf, " ATA1");
	}
	if (pcfg & TX4939_PCFG_SPIMODE) {
	rst \|= TX4939_CLKCTR_SPIRST;
	ckd \|= TX4939_CLKCTR_SPICKD;
	strcat(buf, " SPI");
	}
	if (!(pcfg & (TX4939_PCFG_VSSMODE \| TX4939_PCFG_VPSMODE))) {
	rst \|= TX4939_CLKCTR_VPCRST;
	ckd \|= TX4939_CLKCTR_VPCCKD;
	strcat(buf, " VPC");
	}
	if ((pcfg & TX4939_PCFG_SIO2MODE_MASK) != TX4939_PCFG_SIO2MODE_SIO2) {
	rst \|= TX4939_CLKCTR_SIO2RST;
	ckd \|= TX4939_CLKCTR_SIO2CKD;
	strcat(buf, " SIO2");
	}
	if (pcfg & TX4939_PCFG_SIO3MODE) {
	rst \|= TX4939_CLKCTR_SIO3RST;
	ckd \|= TX4939_CLKCTR_SIO3CKD;
	strcat(buf, " SIO3");
	}
	if (rst \| ckd) {
	txx9_set64(&tx4939_ccfgptr->clkctr, rst);
	txx9_set64(&tx4939_ccfgptr->clkctr, ckd);
	}
	local_irq_enable();
	if (buf[0])
	pr_info("%s: stop%s\n", txx9_pcode_str, buf);
	}

	static int __init tx4939_late_init(void)
	{
	if (txx9_pcode != 0x4939)
	return -ENODEV;
	tx4939_stop_unused_modules();
	return 0;
	}
	late_initcall(tx4939_late_init);