Moved from freebios

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@863 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

2 files changed, 480 insertions, 0 deletions

diff --git a/src/southbridge/winbond/w83c553/w83c553f.c b/src/southbridge/winbond/w83c553/w83c553f.c
new file mode 100644
index 0000000000..699089200f
--- /dev/null
+++ b/src/southbridge/winbond/w83c553/w83c553f.c
@@ -0,0 +1,285 @@
+/*
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Initialisation of the PCI-to-ISA bridge and disabling the BIOS
+ * write protection (for flash) in function 0 of the chip.
+ * Enabling function 1 (IDE controller of the chip.
+ */
+
+#include <types.h>
+#include <arch/io.h>
+#include <pci.h>
+#include <printk.h>
+#include "w83c553f.h"
+
+#ifndef CONFIG_ISA_MEM
+#define CONFIG_ISA_MEM		0xFD000000
+#endif
+#ifndef CONFIG_ISA_IO
+#define CONFIG_ISA_IO		0xFE000000
+#endif
+
+#ifndef CONFIG_IDE_MAXBUS
+#define CONFIG_IDE_MAXBUS	2
+#endif
+#ifndef CONFIG_IDE_MAXDEVICE
+#define CONFIG_IDE_MAXDEVICE	(CONFIG_IDE_MAXBUS*2)
+#endif
+
+u32 ide_bus_offset[CONFIG_IDE_MAXBUS];
+
+void initialise_pic(void);
+void initialise_dma(void);
+
+extern struct pci_ops pci_direct_ppc;
+
+void southbridge_early_init(void)
+{
+	unsigned char reg8;
+
+	/*
+	 * Set ISA memory space
+	 */
+	pci_direct_ppc.read_byte(0, 0x58, W83C553F_IPADCR, &reg8);
+	/* 16 MB ISA memory space */
+	reg8 |= (W83C553F_IPADCR_IPATOM4 | W83C553F_IPADCR_IPATOM5 | W83C553F_IPADCR_IPATOM6 | W83C553F_IPADCR_IPATOM7);
+	reg8 &= ~W83C553F_IPADCR_MBE512;
+	pci_direct_ppc.write_byte(0, 0x58, W83C553F_IPADCR, &reg8);
+}
+
+void southbridge_init(void)
+{
+	struct pci_dev  *devbusfn;
+	unsigned char reg8;
+	unsigned short reg16;
+	unsigned int reg32;
+
+	devbusfn = pci_find_device(W83C553F_VID, W83C553F_DID, 0);
+	if (devbusfn == 0)
+	{
+		printk_info("Error: Cannot find W83C553F controller on any PCI bus\n");
+		return;
+	}
+
+	printk_info("Found W83C553F controller\n");
+
+	/* always enabled */
+#if 0
+	pci_read_config_word(devbusfn, PCI_COMMAND, &reg16);
+	reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+	pci_write_config_word(devbusfn, PCI_COMMAND, reg16);
+#endif
+
+	/*
+	 * Set ISA memory space
+	 */
+	pci_read_config_byte(devbusfn, W83C553F_IPADCR, &reg8);
+	/* 16 MB ISA memory space */
+	reg8 |= (W83C553F_IPADCR_IPATOM4 | W83C553F_IPADCR_IPATOM5 | W83C553F_IPADCR_IPATOM6 | W83C553F_IPADCR_IPATOM7);
+	reg8 &= ~W83C553F_IPADCR_MBE512;
+	pci_write_config_byte(devbusfn, W83C553F_IPADCR, reg8);
+
+	/*
+	 * Chip select: switch off BIOS write protection
+	 */
+	pci_read_config_byte(devbusfn, W83C553F_CSCR, &reg8);
+	reg8 |= W83C553F_CSCR_UBIOSCSE;
+	reg8 &= ~W83C553F_CSCR_BIOSWP;
+	pci_write_config_byte(devbusfn, W83C553F_CSCR, reg8);
+
+
+	/*
+	 * Enable Port 92
+	 */
+	reg8 = W83C553F_ATSCR_P92E | W83C553F_ATSCR_KRCEE;
+	pci_write_config_byte(devbusfn, W83C553F_CSCR, reg8);
+
+	/*
+	 * Route IDE interrupts to IRQ 14 & 15 on 8259.
+	 */
+	pci_write_config_byte(devbusfn, W83C553F_IDEIRCR, 0xef);
+	pci_write_config_word(devbusfn, W83C553F_PCIIRCR, 0x0000);
+
+	/*
+	 * Read IDE bus offsets from function 1 device.
+	 * We must unmask the LSB indicating that it is an IO address.
+	 */
+	devbusfn = pci_find_device(W83C553F_VID, W83C553F_IDE, 0);
+	if (devbusfn == 0)
+	{
+		printk_info("Error: Cannot find W83C553F function 1 device\n");
+		return;
+	}
+
+	/*
+	 * Enable native mode on IDE ports and set base address.
+	 */
+	reg8 = W83C553F_PIR_P1NL | W83C553F_PIR_P0NL;
+	pci_write_config_byte(devbusfn, W83C553F_PIR, reg8);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_0, 0xffffffff);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_0, 0x1f0);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_1, 0xffffffff);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_1, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_1, 0x3f6);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_1, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_2, 0xffffffff);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_2, 0x170);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_3, 0xffffffff);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_3, &reg32);
+	pci_write_config_dword(devbusfn, PCI_BASE_ADDRESS_3, 0x376);
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_3, &reg32);
+
+	/*
+	 * Set read-ahead duration to 0xff
+	 * Enable P0 and P1
+	 */
+	reg32 = 0x00ff0000 | W83C553F_IDECSR_P1EN | W83C553F_IDECSR_P0EN;
+	pci_write_config_dword(devbusfn, W83C553F_IDECSR, reg32);
+	pci_read_config_dword(devbusfn, W83C553F_IDECSR, &reg32);
+
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &ide_bus_offset[0]);
+	printk_debug("ide bus offset = 0x%x\n", ide_bus_offset[0]);
+	ide_bus_offset[0] &= ~1;
+#if CONFIG_IDE_MAXBUS > 1
+	pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_2, &ide_bus_offset[1]);
+	ide_bus_offset[1] &= ~1;
+#endif
+
+	/*
+	 * Enable function 1, IDE -> busmastering and IO space access
+	 */
+	pci_read_config_word(devbusfn, PCI_COMMAND, &reg16);
+	reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO;
+	pci_write_config_word(devbusfn, PCI_COMMAND, reg16);
+	pci_read_config_word(devbusfn, PCI_COMMAND, &reg16);
+
+	/*
+	 * Initialise ISA interrupt controller
+	 */
+	initialise_pic();
+
+	/*
+	 * Initialise DMA controller
+	 */
+	initialise_dma();
+
+	printk_info("W83C553F configuration complete\n");
+}
+
+void initialise_pic(void)
+{
+	outb(W83C553F_PIC1_ICW1, 0x11); /* start init sequence, ICW4 needed */
+	outb(W83C553F_PIC1_ICW2, 0x08); /* base address 00001 */
+	outb(W83C553F_PIC1_ICW3, 0x04); /* slave on IRQ2 */
+	outb(W83C553F_PIC1_ICW4, 0x01); /* x86 mode */
+	outb(W83C553F_PIC1_OCW1, 0xfb); /* enable IRQ 2 */
+	outb(W83C553F_PIC1_ELC, 0xf8);	/* all IRQ's edge sensitive */
+
+	outb(W83C553F_PIC2_ICW1, 0x11); /* start init sequence, ICW4 needed */
+	outb(W83C553F_PIC2_ICW2, 0x08); /* base address 00001 */
+	outb(W83C553F_PIC2_ICW3, 0x02); /* slave ID 2 */
+	outb(W83C553F_PIC2_ICW4, 0x01); /* x86 mode */
+	outb(W83C553F_PIC2_OCW1, 0xff); /* disable all IRQ's */
+	outb(W83C553F_PIC2_ELC, 0xde);	/* all IRQ's edge sensitive */
+
+	outb(W83C553F_TMR1_CMOD, 0x74);
+
+	outb(W83C553F_PIC2_OCW1, 0x20);
+	outb(W83C553F_PIC1_OCW1, 0x20);
+
+	outb(W83C553F_PIC2_OCW1, 0x2b);
+	outb(W83C553F_PIC1_OCW1, 0x2b);
+}
+
+void initialise_dma(void)
+{
+	unsigned int channel;
+	unsigned int rvalue1, rvalue2;
+
+	/* perform a H/W reset of the devices */
+
+	outb(W83C553F_DMA1 + W83C553F_DMA1_MC, 0x00);
+	outw(W83C553F_DMA2 + W83C553F_DMA2_MC, 0x0000);
+
+	/* initialise all channels to a sane state */
+
+	for (channel = 0; channel < 4; channel++) {
+		/*
+		 * dependent upon the channel, setup the specifics:
+		 *
+		 * demand
+		 * address-increment
+		 * autoinitialize-disable
+		 * verify-transfer
+		 */
+
+		switch (channel) {
+		case 0:
+			rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH0SEL|W83C553F_MODE_TT_VERIFY);
+			rvalue2 = (W83C553F_MODE_TM_CASCADE|W83C553F_MODE_CH0SEL);
+			break;
+	    	case 1:
+			rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY);
+			rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH1SEL|W83C553F_MODE_TT_VERIFY);
+			break;
+		case 2:
+			rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY);
+			rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH2SEL|W83C553F_MODE_TT_VERIFY);
+			break;
+		case 3:
+			rvalue1 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY);
+			rvalue2 = (W83C553F_MODE_TM_DEMAND|W83C553F_MODE_CH3SEL|W83C553F_MODE_TT_VERIFY);
+			break;
+		default:
+			rvalue1 = 0x00;
+			rvalue2 = 0x00;
+			break;
+		}
+
+		/* write to write mode registers */
+
+		outb(W83C553F_DMA1 + W83C553F_DMA1_WM, rvalue1 & 0xFF);
+		outw(W83C553F_DMA2 + W83C553F_DMA2_WM, rvalue2 & 0x00FF);
+	}
+
+	/* enable all channels */
+
+	outb(W83C553F_DMA1 + W83C553F_DMA1_CM, 0x00);
+	outw(W83C553F_DMA2 + W83C553F_DMA2_CM, 0x0000);
+	/*
+	 * initialize the global DMA configuration
+	 *
+	 * DACK# active low
+	 * DREQ active high
+	 * fixed priority
+	 * channel group enable
+	 */
+
+	outb(W83C553F_DMA1 + W83C553F_DMA1_CS, 0x00);
+	outw(W83C553F_DMA2 + W83C553F_DMA2_CS, 0x0000);
+}
diff --git a/src/southbridge/winbond/w83c553/w83c553f.h b/src/southbridge/winbond/w83c553/w83c553f.h
new file mode 100644
index 0000000000..f071371938
--- /dev/null
+++ b/src/southbridge/winbond/w83c553/w83c553f.h
@@ -0,0 +1,195 @@
+/*
+ * (C) Copyright 2000
+ * Rob Taylor, Flying Pig Systems. robt@flyingpig.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+ /* winbond access routines and defines*/
+
+/* from the winbond data sheet -
+ The W83C553F SIO controller with PCI arbiter is a multi-function PCI device.
+ Function 0 is the ISA bridge, and Function 1 is the bus master IDE controller.
+*/
+
+/*ISA bridge configuration space*/
+
+#define W83C553F_VID		0x10AD
+#define W83C553F_DID		0x0565
+#define W83C553F_IDE		0x0105
+
+/* Function 0 registers */
+#define W83C553F_PCICONTR	0x40  /*pci control reg*/
+#define W83C553F_SGBAR		0x41  /*scatter/gather base address reg*/
+#define W83C553F_LBCR		0x42  /*Line Buffer Control reg*/
+#define W83C553F_IDEIRCR	0x43  /*IDE Interrupt Routing Control  Reg*/
+#define W83C553F_PCIIRCR	0x44  /*PCI Interrupt Routing Control Reg*/
+#define W83C553F_BTBAR		0x46  /*BIOS Timer Base Address Register*/
+#define W83C553F_IPADCR		0x48  /*ISA to PCI Address Decoder Control Register*/
+#define W83C553F_IRADCR		0x49  /*ISA ROM Address Decoder Control Register*/
+#define W83C553F_IPMHSAR	0x4a  /*ISA to PCI Memory Hole STart Address Register*/
+#define W83C553F_IPMHSR		0x4b  /*ISA to PCI Memory Hols Size Register*/
+#define W83C553F_CDR			0x4c  /*Clock Divisor Register*/
+#define W83C553F_CSCR		0x4d  /*Chip Select Control Register*/
+#define W83C553F_ATSCR		0x4e  /*AT System Control register*/
+#define W83C553F_ATBCR		0x4f  /*AT Bus ControL Register*/
+#define W83C553F_IRQBEE0R	0x60  /*IRQ Break Event Enable 0 Register*/
+#define W83C553F_IRQBEE1R	0x61  /*IRQ Break Event Enable 1 Register*/
+#define W83C553F_ABEER		0x62  /*Additional Break Event Enable Register*/
+#define W83C553F_DMABEER	0x63  /*DMA Break Event Enable Register*/
+
+/* Function 1 registers */
+#define W83C553F_PIR		0x09  /*Programming Interface Register*/
+#define W83C553F_IDECSR		0x40  /*IDE Control/Status Register*/
+
+/* register bit definitions */
+#define W83C553F_IPADCR_MBE512		0x1
+#define W83C553F_IPADCR_MBE640		0x2
+#define W83C553F_IPADCR_IPATOM4		0x10
+#define W83C553F_IPADCR_IPATOM5		0x20
+#define W83C553F_IPADCR_IPATOM6		0x40
+#define W83C553F_IPADCR_IPATOM7		0x80
+
+#define W83C553F_CSCR_UBIOSCSE		0x10
+#define W83C553F_CSCR_BIOSWP		0x20
+
+#define W83C553F_IDECSR_P0EN		0x01
+#define W83C553F_IDECSR_P0F16		0x02
+#define W83C553F_IDECSR_P1EN		0x10
+#define W83C553F_IDECSR_P1F16		0x20
+#define W83C553F_IDECSR_LEGIRQ		0x800
+
+#define W83C553F_ATSCR_ISARE		0x40
+#define W83C553F_ATSCR_FERRE		0x10
+#define W83C553F_ATSCR_P92E		0x04
+#define W83C553F_ATSCR_KRCEE		0x02
+#define W83C553F_ATSCR_KGA20EE		0x01
+
+#define W83C553F_PIR_BM			0x80
+#define W83C553F_PIR_P1PROG		0x08
+#define W83C553F_PIR_P1NL		0x04
+#define W83C553F_PIR_P0PROG		0x02
+#define W83C553F_PIR_P0NL		0x01
+
+/*
+ * Interrupt controller
+ */
+#define W83C553F_PIC1_ICW1	CONFIG_ISA_IO + 0x20
+#define W83C553F_PIC1_ICW2	CONFIG_ISA_IO + 0x21
+#define W83C553F_PIC1_ICW3	CONFIG_ISA_IO + 0x21
+#define W83C553F_PIC1_ICW4	CONFIG_ISA_IO + 0x21
+#define W83C553F_PIC1_OCW1	CONFIG_ISA_IO + 0x21
+#define W83C553F_PIC1_OCW2	CONFIG_ISA_IO + 0x20
+#define W83C553F_PIC1_OCW3	CONFIG_ISA_IO + 0x20
+#define W83C553F_PIC1_ELC	CONFIG_ISA_IO + 0x4D0
+#define W83C553F_PIC2_ICW1	CONFIG_ISA_IO + 0xA0
+#define W83C553F_PIC2_ICW2	CONFIG_ISA_IO + 0xA1
+#define W83C553F_PIC2_ICW3	CONFIG_ISA_IO + 0xA1
+#define W83C553F_PIC2_ICW4	CONFIG_ISA_IO + 0xA1
+#define W83C553F_PIC2_OCW1	CONFIG_ISA_IO + 0xA1
+#define W83C553F_PIC2_OCW2	CONFIG_ISA_IO + 0xA0
+#define W83C553F_PIC2_OCW3	CONFIG_ISA_IO + 0xA0
+#define W83C553F_PIC2_ELC	CONFIG_ISA_IO + 0x4D1
+
+#define W83C553F_TMR1_CMOD	CONFIG_ISA_IO + 0x43
+
+/*
+ * DMA controller
+ */
+#define W83C553F_DMA1	CONFIG_ISA_IO + 0x000	/* channel 0 - 3 */
+#define W83C553F_DMA2	CONFIG_ISA_IO + 0x0C0	/* channel 4 - 7 */
+
+/* command/status register bit definitions */
+
+#define W83C553F_CS_COM_DACKAL	(1<<7)	/* DACK# assert level */
+#define W83C553F_CS_COM_DREQSAL	(1<<6)	/* DREQ sense assert level */
+#define W83C553F_CS_COM_GAP	(1<<4)	/* group arbitration priority */
+#define W83C553F_CS_COM_CGE	(1<<2)	/* channel group enable */
+
+#define W83C553F_CS_STAT_CH0REQ	(1<<4)	/* channel 0 (4) DREQ status */
+#define W83C553F_CS_STAT_CH1REQ	(1<<5)	/* channel 1 (5) DREQ status */
+#define W83C553F_CS_STAT_CH2REQ	(1<<6)	/* channel 2 (6) DREQ status */
+#define W83C553F_CS_STAT_CH3REQ	(1<<7)	/* channel 3 (7) DREQ status */
+
+#define W83C553F_CS_STAT_CH0TC	(1<<0)	/* channel 0 (4) TC status */
+#define W83C553F_CS_STAT_CH1TC	(1<<1)	/* channel 1 (5) TC status */
+#define W83C553F_CS_STAT_CH2TC	(1<<2)	/* channel 2 (6) TC status */
+#define W83C553F_CS_STAT_CH3TC	(1<<3)	/* channel 3 (7) TC status */
+
+/* mode register bit definitions */
+
+#define W83C553F_MODE_TM_DEMAND	(0<<6)	/* transfer mode - demand */
+#define W83C553F_MODE_TM_SINGLE	(1<<6)	/* transfer mode - single */
+#define W83C553F_MODE_TM_BLOCK	(2<<6)	/* transfer mode - block */
+#define W83C553F_MODE_TM_CASCADE	(3<<6)	/* transfer mode - cascade */
+#define W83C553F_MODE_ADDRDEC	(1<<5)	/* address increment/decrement select */
+#define W83C553F_MODE_AUTOINIT	(1<<4)	/* autoinitialize enable */
+#define W83C553F_MODE_TT_VERIFY	(0<<2)	/* transfer type - verify */
+#define W83C553F_MODE_TT_WRITE	(1<<2)	/* transfer type - write */
+#define W83C553F_MODE_TT_READ	(2<<2)	/* transfer type - read */
+#define W83C553F_MODE_TT_ILLEGAL	(3<<2)	/* transfer type - illegal */
+#define W83C553F_MODE_CH0SEL	(0<<0)	/* channel 0 (4) select */
+#define W83C553F_MODE_CH1SEL	(1<<0)	/* channel 1 (5) select */
+#define W83C553F_MODE_CH2SEL	(2<<0)	/* channel 2 (6) select */
+#define W83C553F_MODE_CH3SEL	(3<<0)	/* channel 3 (7) select */
+
+/* request register bit definitions */
+
+#define W83C553F_REQ_CHSERREQ	(1<<2)	/* channel service request */
+#define W83C553F_REQ_CH0SEL	(0<<0)	/* channel 0 (4) select */
+#define W83C553F_REQ_CH1SEL	(1<<0)	/* channel 1 (5) select */
+#define W83C553F_REQ_CH2SEL	(2<<0)	/* channel 2 (6) select */
+#define W83C553F_REQ_CH3SEL	(3<<0)	/* channel 3 (7) select */
+
+/* write single mask bit register bit definitions */
+
+#define W83C553F_WSMB_CHMASKSEL	(1<<2)	/* channel mask select */
+#define W83C553F_WSMB_CH0SEL	(0<<0)	/* channel 0 (4) select */
+#define W83C553F_WSMB_CH1SEL	(1<<0)	/* channel 1 (5) select */
+#define W83C553F_WSMB_CH2SEL	(2<<0)	/* channel 2 (6) select */
+#define W83C553F_WSMB_CH3SEL	(3<<0)	/* channel 3 (7) select */
+
+/* read/write all mask bits register bit definitions */
+
+#define W83C553F_RWAMB_CH0MASK	(1<<0)	/* channel 0 (4) mask */
+#define W83C553F_RWAMB_CH1MASK	(1<<1)	/* channel 1 (5) mask */
+#define W83C553F_RWAMB_CH2MASK	(1<<2)	/* channel 2 (6) mask */
+#define W83C553F_RWAMB_CH3MASK	(1<<3)	/* channel 3 (7) mask */
+
+/* typedefs */
+
+#define W83C553F_DMA1_CS		0x8
+#define W83C553F_DMA1_WR		0x9
+#define W83C553F_DMA1_WSMB		0xA
+#define W83C553F_DMA1_WM		0xB
+#define W83C553F_DMA1_CBP		0xC
+#define W83C553F_DMA1_MC		0xD
+#define W83C553F_DMA1_CM		0xE
+#define W83C553F_DMA1_RWAMB		0xF
+
+#define W83C553F_DMA2_CS		0xD0
+#define W83C553F_DMA2_WR		0xD2
+#define W83C553F_DMA2_WSMB		0xD4
+#define W83C553F_DMA2_WM		0xD6
+#define W83C553F_DMA2_CBP		0xD8
+#define W83C553F_DMA2_MC		0xDA
+#define W83C553F_DMA2_CM		0xDC
+#define W83C553F_DMA2_RWAMB		0xDE
+
+void initialise_w83c553f(void);