1 files changed, 460 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c
new file mode 100644
index 00000000000..f14a497077d
--- /dev/null
+++ b/arch/mips/txx9/generic/setup_tx4939.c
@@ -0,0 +1,460 @@
+/*
+ * 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 <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);
+}
+
+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);