Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 622 insertions, 0 deletions

diff --git a/arch/mips/txx9/rbtx4927/Makefile b/arch/mips/txx9/rbtx4927/Makefile
new file mode 100644
index 000000000..08a02aebd
--- /dev/null
+++ b/arch/mips/txx9/rbtx4927/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y	+= prom.o setup.o irq.o
diff --git a/arch/mips/txx9/rbtx4927/irq.c b/arch/mips/txx9/rbtx4927/irq.c
new file mode 100644
index 000000000..3f48292c9
--- /dev/null
+++ b/arch/mips/txx9/rbtx4927/irq.c
@@ -0,0 +1,198 @@
+/*
+ * Toshiba RBTX4927 specific interrupt handlers
+ *
+ * Author: MontaVista Software, Inc.
+ *	   source@mvista.com
+ *
+ * Copyright 2001-2002 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.
+ *
+ *  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.
+ */
+/*
+ * I8259A_IRQ_BASE+00
+ * I8259A_IRQ_BASE+01 PS2/Keyboard
+ * I8259A_IRQ_BASE+02 Cascade RBTX4927-ISA (irqs 8-15)
+ * I8259A_IRQ_BASE+03
+ * I8259A_IRQ_BASE+04
+ * I8259A_IRQ_BASE+05
+ * I8259A_IRQ_BASE+06
+ * I8259A_IRQ_BASE+07
+ * I8259A_IRQ_BASE+08
+ * I8259A_IRQ_BASE+09
+ * I8259A_IRQ_BASE+10
+ * I8259A_IRQ_BASE+11
+ * I8259A_IRQ_BASE+12 PS2/Mouse (not supported at this time)
+ * I8259A_IRQ_BASE+13
+ * I8259A_IRQ_BASE+14 IDE
+ * I8259A_IRQ_BASE+15
+ *
+ * MIPS_CPU_IRQ_BASE+00 Software 0
+ * MIPS_CPU_IRQ_BASE+01 Software 1
+ * MIPS_CPU_IRQ_BASE+02 Cascade TX4927-CP0
+ * MIPS_CPU_IRQ_BASE+03 Multiplexed -- do not use
+ * MIPS_CPU_IRQ_BASE+04 Multiplexed -- do not use
+ * MIPS_CPU_IRQ_BASE+05 Multiplexed -- do not use
+ * MIPS_CPU_IRQ_BASE+06 Multiplexed -- do not use
+ * MIPS_CPU_IRQ_BASE+07 CPU TIMER
+ *
+ * TXX9_IRQ_BASE+00
+ * TXX9_IRQ_BASE+01
+ * TXX9_IRQ_BASE+02
+ * TXX9_IRQ_BASE+03 Cascade RBTX4927-IOC
+ * TXX9_IRQ_BASE+04
+ * TXX9_IRQ_BASE+05 RBTX4927 RTL-8019AS ethernet
+ * TXX9_IRQ_BASE+06
+ * TXX9_IRQ_BASE+07
+ * TXX9_IRQ_BASE+08 TX4927 SerialIO Channel 0
+ * TXX9_IRQ_BASE+09 TX4927 SerialIO Channel 1
+ * TXX9_IRQ_BASE+10
+ * TXX9_IRQ_BASE+11
+ * TXX9_IRQ_BASE+12
+ * TXX9_IRQ_BASE+13
+ * TXX9_IRQ_BASE+14
+ * TXX9_IRQ_BASE+15
+ * TXX9_IRQ_BASE+16 TX4927 PCI PCI-C
+ * TXX9_IRQ_BASE+17
+ * TXX9_IRQ_BASE+18
+ * TXX9_IRQ_BASE+19
+ * TXX9_IRQ_BASE+20
+ * TXX9_IRQ_BASE+21
+ * TXX9_IRQ_BASE+22 TX4927 PCI PCI-ERR
+ * TXX9_IRQ_BASE+23 TX4927 PCI PCI-PMA (not used)
+ * TXX9_IRQ_BASE+24
+ * TXX9_IRQ_BASE+25
+ * TXX9_IRQ_BASE+26
+ * TXX9_IRQ_BASE+27
+ * TXX9_IRQ_BASE+28
+ * TXX9_IRQ_BASE+29
+ * TXX9_IRQ_BASE+30
+ * TXX9_IRQ_BASE+31
+ *
+ * RBTX4927_IRQ_IOC+00 FPCIB0 PCI-D (SouthBridge)
+ * RBTX4927_IRQ_IOC+01 FPCIB0 PCI-C (SouthBridge)
+ * RBTX4927_IRQ_IOC+02 FPCIB0 PCI-B (SouthBridge/IDE/pin=1,INTR)
+ * RBTX4927_IRQ_IOC+03 FPCIB0 PCI-A (SouthBridge/USB/pin=4)
+ * RBTX4927_IRQ_IOC+04
+ * RBTX4927_IRQ_IOC+05
+ * RBTX4927_IRQ_IOC+06
+ * RBTX4927_IRQ_IOC+07
+ *
+ * NOTES:
+ * SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58
+ * SouthBridge/ISA/pin=0 no pci irq used by this device
+ * SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR
+ * via ISA IRQ14
+ * SouthBridge/USB/pin=4 using pci irq SouthBridge/D=PCI-A=#59
+ * SouthBridge/PMC/pin=0 no pci irq used by this device
+ * SuperIO/PS2/Keyboard, using INTR via ISA IRQ1
+ * SuperIO/PS2/Mouse, using INTR via ISA IRQ12 (mouse not currently supported)
+ * JP7 is not bus master -- do NOT use -- only 4 pci bus master's
+ * allowed -- SouthBridge, JP4, JP5, JP6
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/rbtx4927.h>
+
+static int toshiba_rbtx4927_irq_nested(int sw_irq)
+{
+	u8 level3;
+
+	level3 = readb(rbtx4927_imstat_addr) & 0x1f;
+	if (unlikely(!level3))
+		return -1;
+	return RBTX4927_IRQ_IOC + __fls8(level3);
+}
+
+static void toshiba_rbtx4927_irq_ioc_enable(struct irq_data *d)
+{
+	unsigned char v;
+
+	v = readb(rbtx4927_imask_addr);
+	v |= (1 << (d->irq - RBTX4927_IRQ_IOC));
+	writeb(v, rbtx4927_imask_addr);
+}
+
+static void toshiba_rbtx4927_irq_ioc_disable(struct irq_data *d)
+{
+	unsigned char v;
+
+	v = readb(rbtx4927_imask_addr);
+	v &= ~(1 << (d->irq - RBTX4927_IRQ_IOC));
+	writeb(v, rbtx4927_imask_addr);
+	mmiowb();
+}
+
+#define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC"
+static struct irq_chip toshiba_rbtx4927_irq_ioc_type = {
+	.name = TOSHIBA_RBTX4927_IOC_NAME,
+	.irq_mask = toshiba_rbtx4927_irq_ioc_disable,
+	.irq_unmask = toshiba_rbtx4927_irq_ioc_enable,
+};
+
+static void __init toshiba_rbtx4927_irq_ioc_init(void)
+{
+	int i;
+
+	/* mask all IOC interrupts */
+	writeb(0, rbtx4927_imask_addr);
+	/* clear SoftInt interrupts */
+	writeb(0, rbtx4927_softint_addr);
+
+	for (i = RBTX4927_IRQ_IOC;
+	     i < RBTX4927_IRQ_IOC + RBTX4927_NR_IRQ_IOC; i++)
+		irq_set_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type,
+					 handle_level_irq);
+	irq_set_chained_handler(RBTX4927_IRQ_IOCINT, handle_simple_irq);
+}
+
+static int rbtx4927_irq_dispatch(int pending)
+{
+	int irq;
+
+	if (pending & STATUSF_IP7)			/* cpu timer */
+		irq = MIPS_CPU_IRQ_BASE + 7;
+	else if (pending & STATUSF_IP2) {		/* tx4927 pic */
+		irq = txx9_irq();
+		if (irq == RBTX4927_IRQ_IOCINT)
+			irq = toshiba_rbtx4927_irq_nested(irq);
+	} else if (pending & STATUSF_IP0)		/* user line 0 */
+		irq = MIPS_CPU_IRQ_BASE + 0;
+	else if (pending & STATUSF_IP1)			/* user line 1 */
+		irq = MIPS_CPU_IRQ_BASE + 1;
+	else
+		irq = -1;
+	return irq;
+}
+
+void __init rbtx4927_irq_setup(void)
+{
+	txx9_irq_dispatch = rbtx4927_irq_dispatch;
+	tx4927_irq_init();
+	toshiba_rbtx4927_irq_ioc_init();
+	/* Onboard 10M Ether: High Active */
+	irq_set_irq_type(RBTX4927_RTL_8019_IRQ, IRQF_TRIGGER_HIGH);
+}
diff --git a/arch/mips/txx9/rbtx4927/prom.c b/arch/mips/txx9/rbtx4927/prom.c
new file mode 100644
index 000000000..9b4acff82
--- /dev/null
+++ b/arch/mips/txx9/rbtx4927/prom.c
@@ -0,0 +1,42 @@
+/*
+ * rbtx4927 specific prom routines
+ *
+ * Author: MontaVista Software, Inc.
+ *	   source@mvista.com
+ *
+ * Copyright 2001-2002 MontaVista Software Inc.
+ *
+ * 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/memblock.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/rbtx4927.h>
+
+void __init rbtx4927_prom_init(void)
+{
+	memblock_add(0, tx4927_get_mem_size());
+	txx9_sio_putchar_init(TX4927_SIO_REG(0) & 0xfffffffffULL);
+}
diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c
new file mode 100644
index 000000000..31955c1d5
--- /dev/null
+++ b/arch/mips/txx9/rbtx4927/setup.c
@@ -0,0 +1,380 @@
+/*
+ * 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/platform_device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/leds.h>
+#include <asm/io.h>
+#include <asm/reboot.h>
+#include <asm/txx9pio.h>
+#include <asm/txx9/generic.h>
+#include <asm/txx9/pci.h>
+#include <asm/txx9/rbtx4927.h>
+#include <asm/txx9/tx4938.h>	/* for TX4937 */
+
+#ifdef CONFIG_PCI
+static void __init tx4927_pci_setup(void)
+{
+	int extarb = !(__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCIARB);
+	struct pci_controller *c = &txx9_primary_pcic;
+
+	register_pci_controller(c);
+
+	if (__raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_PCI66)
+		txx9_pci_option =
+			(txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
+			TXX9_PCI_OPT_CLK_66; /* already configured */
+
+	/* Reset PCI Bus */
+	writeb(1, rbtx4927_pcireset_addr);
+	/* Reset PCIC */
+	txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
+	if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
+	    TXX9_PCI_OPT_CLK_66)
+		tx4927_pciclk66_setup();
+	mdelay(10);
+	/* clear PCIC reset */
+	txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
+	writeb(0, rbtx4927_pcireset_addr);
+	iob();
+
+	tx4927_report_pciclk();
+	tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
+	if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
+	    TXX9_PCI_OPT_CLK_AUTO &&
+	    txx9_pci66_check(c, 0, 0)) {
+		/* Reset PCI Bus */
+		writeb(1, rbtx4927_pcireset_addr);
+		/* Reset PCIC */
+		txx9_set64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
+		tx4927_pciclk66_setup();
+		mdelay(10);
+		/* clear PCIC reset */
+		txx9_clear64(&tx4927_ccfgptr->clkctr, TX4927_CLKCTR_PCIRST);
+		writeb(0, rbtx4927_pcireset_addr);
+		iob();
+		/* Reinitialize PCIC */
+		tx4927_report_pciclk();
+		tx4927_pcic_setup(tx4927_pcicptr, c, extarb);
+	}
+	tx4927_setup_pcierr_irq();
+}
+
+static void __init tx4937_pci_setup(void)
+{
+	int extarb = !(__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCIARB);
+	struct pci_controller *c = &txx9_primary_pcic;
+
+	register_pci_controller(c);
+
+	if (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66)
+		txx9_pci_option =
+			(txx9_pci_option & ~TXX9_PCI_OPT_CLK_MASK) |
+			TXX9_PCI_OPT_CLK_66; /* already configured */
+
+	/* Reset PCI Bus */
+	writeb(1, rbtx4927_pcireset_addr);
+	/* Reset PCIC */
+	txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
+	if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
+	    TXX9_PCI_OPT_CLK_66)
+		tx4938_pciclk66_setup();
+	mdelay(10);
+	/* clear PCIC reset */
+	txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
+	writeb(0, rbtx4927_pcireset_addr);
+	iob();
+
+	tx4938_report_pciclk();
+	tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
+	if ((txx9_pci_option & TXX9_PCI_OPT_CLK_MASK) ==
+	    TXX9_PCI_OPT_CLK_AUTO &&
+	    txx9_pci66_check(c, 0, 0)) {
+		/* Reset PCI Bus */
+		writeb(1, rbtx4927_pcireset_addr);
+		/* Reset PCIC */
+		txx9_set64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
+		tx4938_pciclk66_setup();
+		mdelay(10);
+		/* clear PCIC reset */
+		txx9_clear64(&tx4938_ccfgptr->clkctr, TX4938_CLKCTR_PCIRST);
+		writeb(0, rbtx4927_pcireset_addr);
+		iob();
+		/* Reinitialize PCIC */
+		tx4938_report_pciclk();
+		tx4927_pcic_setup(tx4938_pcicptr, c, extarb);
+	}
+	tx4938_setup_pcierr_irq();
+}
+#else
+static inline void tx4927_pci_setup(void) {}
+static inline void tx4937_pci_setup(void) {}
+#endif /* CONFIG_PCI */
+
+static void __init rbtx4927_gpio_init(void)
+{
+	/* TX4927-SIO DTR on (PIO[15]) */
+	gpio_request(15, "sio-dtr");
+	gpio_direction_output(15, 1);
+
+	tx4927_sio_init(0, 0);
+}
+
+static void __init rbtx4927_arch_init(void)
+{
+	txx9_gpio_init(TX4927_PIO_REG & 0xfffffffffULL, 0, TX4927_NUM_PIO);
+
+	rbtx4927_gpio_init();
+
+	tx4927_pci_setup();
+}
+
+static void __init rbtx4937_arch_init(void)
+{
+	txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
+
+	rbtx4927_gpio_init();
+
+	tx4937_pci_setup();
+}
+
+static void toshiba_rbtx4927_restart(char *command)
+{
+	/* enable the s/w reset register */
+	writeb(1, rbtx4927_softresetlock_addr);
+
+	/* wait for enable to be seen */
+	while (!(readb(rbtx4927_softresetlock_addr) & 1))
+		;
+
+	/* do a s/w reset */
+	writeb(1, rbtx4927_softreset_addr);
+
+	/* fallback */
+	(*_machine_halt)();
+}
+
+static void __init rbtx4927_clock_init(void);
+static void __init rbtx4937_clock_init(void);
+
+static void __init rbtx4927_mem_setup(void)
+{
+	if (TX4927_REV_PCODE() == 0x4927) {
+		rbtx4927_clock_init();
+		tx4927_setup();
+	} else {
+		rbtx4937_clock_init();
+		tx4938_setup();
+	}
+
+	_machine_restart = toshiba_rbtx4927_restart;
+
+#ifdef CONFIG_PCI
+	txx9_alloc_pci_controller(&txx9_primary_pcic,
+				  RBTX4927_PCIMEM, RBTX4927_PCIMEM_SIZE,
+				  RBTX4927_PCIIO, RBTX4927_PCIIO_SIZE);
+	txx9_board_pcibios_setup = tx4927_pcibios_setup;
+#else
+	set_io_port_base(KSEG1 + RBTX4927_ISA_IO_OFFSET);
+#endif
+}
+
+static void __init rbtx4927_clock_init(void)
+{
+	/*
+	 * 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)
+	 */
+	switch ((unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg) &
+		TX4927_CCFG_PCIDIVMODE_MASK) {
+	case TX4927_CCFG_PCIDIVMODE_2_5:
+	case TX4927_CCFG_PCIDIVMODE_5:
+		txx9_cpu_clock = 166666666;	/* 166MHz */
+		break;
+	default:
+		txx9_cpu_clock = 200000000;	/* 200MHz */
+	}
+}
+
+static void __init rbtx4937_clock_init(void)
+{
+	/*
+	 * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz.
+	 *
+	 * 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)
+	 */
+	switch ((unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg) &
+		TX4938_CCFG_PCIDIVMODE_MASK) {
+	case TX4938_CCFG_PCIDIVMODE_8:
+	case TX4938_CCFG_PCIDIVMODE_4:
+		txx9_cpu_clock = 266666666;	/* 266MHz */
+		break;
+	case TX4938_CCFG_PCIDIVMODE_9:
+	case TX4938_CCFG_PCIDIVMODE_4_5:
+		txx9_cpu_clock = 300000000;	/* 300MHz */
+		break;
+	default:
+		txx9_cpu_clock = 333333333;	/* 333MHz */
+	}
+}
+
+static void __init rbtx4927_time_init(void)
+{
+	tx4927_time_init(0);
+}
+
+static void __init toshiba_rbtx4927_rtc_init(void)
+{
+	struct resource res = {
+		.start	= RBTX4927_BRAMRTC_BASE - IO_BASE,
+		.end	= RBTX4927_BRAMRTC_BASE - IO_BASE + 0x800 - 1,
+		.flags	= IORESOURCE_MEM,
+	};
+	platform_device_register_simple("rtc-ds1742", -1, &res, 1);
+}
+
+static void __init rbtx4927_ne_init(void)
+{
+	struct resource res[] = {
+		{
+			.start	= RBTX4927_RTL_8019_BASE,
+			.end	= RBTX4927_RTL_8019_BASE + 0x20 - 1,
+			.flags	= IORESOURCE_IO,
+		}, {
+			.start	= RBTX4927_RTL_8019_IRQ,
+			.flags	= IORESOURCE_IRQ,
+		}
+	};
+	platform_device_register_simple("ne", -1, res, ARRAY_SIZE(res));
+}
+
+static void __init rbtx4927_mtd_init(void)
+{
+	int i;
+
+	for (i = 0; i < 2; i++)
+		tx4927_mtd_init(i);
+}
+
+static void __init rbtx4927_gpioled_init(void)
+{
+	static const struct gpio_led leds[] = {
+		{ .name = "gpioled:green:0", .gpio = 0, .active_low = 1, },
+		{ .name = "gpioled:green:1", .gpio = 1, .active_low = 1, },
+	};
+	static struct gpio_led_platform_data pdata = {
+		.num_leds = ARRAY_SIZE(leds),
+		.leds = leds,
+	};
+	struct platform_device *pdev = platform_device_alloc("leds-gpio", 0);
+
+	if (!pdev)
+		return;
+	pdev->dev.platform_data = &pdata;
+	if (platform_device_add(pdev))
+		platform_device_put(pdev);
+}
+
+static void __init rbtx4927_device_init(void)
+{
+	toshiba_rbtx4927_rtc_init();
+	rbtx4927_ne_init();
+	tx4927_wdt_init();
+	rbtx4927_mtd_init();
+	if (TX4927_REV_PCODE() == 0x4927) {
+		tx4927_dmac_init(2);
+		tx4927_aclc_init(0, 1);
+	} else {
+		tx4938_dmac_init(0, 2);
+		tx4938_aclc_init();
+	}
+	platform_device_register_simple("txx9aclc-generic", -1, NULL, 0);
+	txx9_iocled_init(RBTX4927_LED_ADDR - IO_BASE, -1, 3, 1, "green", NULL);
+	rbtx4927_gpioled_init();
+}
+
+struct txx9_board_vec rbtx4927_vec __initdata = {
+	.system = "Toshiba RBTX4927",
+	.prom_init = rbtx4927_prom_init,
+	.mem_setup = rbtx4927_mem_setup,
+	.irq_setup = rbtx4927_irq_setup,
+	.time_init = rbtx4927_time_init,
+	.device_init = rbtx4927_device_init,
+	.arch_init = rbtx4927_arch_init,
+#ifdef CONFIG_PCI
+	.pci_map_irq = rbtx4927_pci_map_irq,
+#endif
+};
+struct txx9_board_vec rbtx4937_vec __initdata = {
+	.system = "Toshiba RBTX4937",
+	.prom_init = rbtx4927_prom_init,
+	.mem_setup = rbtx4927_mem_setup,
+	.irq_setup = rbtx4927_irq_setup,
+	.time_init = rbtx4927_time_init,
+	.device_init = rbtx4927_device_init,
+	.arch_init = rbtx4937_arch_init,
+#ifdef CONFIG_PCI
+	.pci_map_irq = rbtx4927_pci_map_irq,
+#endif
+};