openwrt/target/linux/brcm-2.4/files/arch/mips/bcm947xx/include/sbchipc.h

/*
 * SiliconBackplane Chipcommon core hardware definitions.
 *
 * The chipcommon core provides chip identification, SB control,
 * jtag, 0/1/2 uarts, clock frequency control, a watchdog interrupt timer,
 * gpio interface, extbus, and support for serial and parallel flashes.
 *
 * $Id: sbchipc.h,v 1.1.1.14 2006/04/15 01:29:08 michael Exp $
 * Copyright 2006, Broadcom Corporation
 * All Rights Reserved.
 * 
 * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
 * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
 * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
 *
 */

#ifndef	_SBCHIPC_H
#define	_SBCHIPC_H


#ifndef _LANGUAGE_ASSEMBLY

/* cpp contortions to concatenate w/arg prescan */
#ifndef PAD
#define	_PADLINE(line)	pad ## line
#define	_XSTR(line)	_PADLINE(line)
#define	PAD		_XSTR(__LINE__)
#endif	/* PAD */

typedef volatile struct {
	uint32	chipid;			/* 0x0 */
	uint32	capabilities;
	uint32	corecontrol;		/* corerev >= 1 */
	uint32	bist;

	/* OTP */
	uint32	otpstatus;		/* 0x10, corerev >= 10 */
	uint32	otpcontrol;
	uint32	otpprog;
	uint32	PAD;

	/* Interrupt control */
	uint32	intstatus;		/* 0x20 */
	uint32	intmask;
	uint32	chipcontrol;		/* 0x28, rev >= 11 */
	uint32	chipstatus;		/* 0x2c, rev >= 11 */

	/* Jtag Master */
	uint32	jtagcmd;		/* 0x30, rev >= 10 */
	uint32	jtagir;
	uint32	jtagdr;
	uint32	jtagctrl;

	/* serial flash interface registers */
	uint32	flashcontrol;		/* 0x40 */
	uint32	flashaddress;
	uint32	flashdata;
	uint32	PAD[1];

	/* Silicon backplane configuration broadcast control */
	uint32	broadcastaddress;	/* 0x50 */
	uint32	broadcastdata;
	uint32	PAD[2];

	/* gpio - cleared only by power-on-reset */
	uint32	gpioin;			/* 0x60 */
	uint32	gpioout;
	uint32	gpioouten;
	uint32	gpiocontrol;
	uint32	gpiointpolarity;
	uint32	gpiointmask;
	uint32	PAD[2];

	/* Watchdog timer */
	uint32	watchdog;		/* 0x80 */
	uint32	PAD[1];

	/* GPIO based LED powersave registers corerev >= 16 */
	uint32  gpiotimerval;		/* 0x88 */
	uint32  gpiotimeroutmask;

	/* clock control */
	uint32	clockcontrol_n;		/* 0x90 */
	uint32	clockcontrol_sb;	/* aka m0 */
	uint32	clockcontrol_pci;	/* aka m1 */
	uint32	clockcontrol_m2;	/* mii/uart/mipsref */
	uint32	clockcontrol_m3;	/* cpu */
	uint32	clkdiv;			/* corerev >= 3 */
	uint32	PAD[2];

	/* pll delay registers (corerev >= 4) */
	uint32	pll_on_delay;		/* 0xb0 */
	uint32	fref_sel_delay;
	uint32	slow_clk_ctl;		/* 5 < corerev < 10 */
	uint32	PAD[1];

	/* Instaclock registers (corerev >= 10) */
	uint32	system_clk_ctl;		/* 0xc0 */
	uint32	clkstatestretch;
	uint32	PAD[14];

	/* ExtBus control registers (corerev >= 3) */
	uint32	pcmcia_config;		/* 0x100 */
	uint32	pcmcia_memwait;
	uint32	pcmcia_attrwait;
	uint32	pcmcia_iowait;
	uint32	ide_config;
	uint32	ide_memwait;
	uint32	ide_attrwait;
	uint32	ide_iowait;
	uint32	prog_config;
	uint32	prog_waitcount;
	uint32	flash_config;
	uint32	flash_waitcount;
	uint32	PAD[44];

	/* Clock control and hardware workarounds */
	uint32	clk_ctl_st;
	uint32	hw_war;
	uint32	PAD[70];

	/* uarts */
	uint8	uart0data;		/* 0x300 */
	uint8	uart0imr;
	uint8	uart0fcr;
	uint8	uart0lcr;
	uint8	uart0mcr;
	uint8	uart0lsr;
	uint8	uart0msr;
	uint8	uart0scratch;
	uint8	PAD[248];		/* corerev >= 1 */

	uint8	uart1data;		/* 0x400 */
	uint8	uart1imr;
	uint8	uart1fcr;
	uint8	uart1lcr;
	uint8	uart1mcr;
	uint8	uart1lsr;
	uint8	uart1msr;
	uint8	uart1scratch;
} chipcregs_t;

#endif /* _LANGUAGE_ASSEMBLY */

#define	CC_CHIPID		0
#define	CC_CAPABILITIES		4
#define	CC_JTAGCMD		0x30
#define	CC_JTAGIR		0x34
#define	CC_JTAGDR		0x38
#define	CC_JTAGCTRL		0x3c
#define	CC_WATCHDOG		0x80
#define	CC_CLKC_N		0x90
#define	CC_CLKC_M0		0x94
#define	CC_CLKC_M1		0x98
#define	CC_CLKC_M2		0x9c
#define	CC_CLKC_M3		0xa0
#define	CC_CLKDIV		0xa4
#define	CC_SYS_CLK_CTL		0xc0
#define	CC_OTP			0x800

/* chipid */
#define	CID_ID_MASK		0x0000ffff	/* Chip Id mask */
#define	CID_REV_MASK		0x000f0000	/* Chip Revision mask */
#define	CID_REV_SHIFT		16		/* Chip Revision shift */
#define	CID_PKG_MASK		0x00f00000	/* Package Option mask */
#define	CID_PKG_SHIFT		20		/* Package Option shift */
#define	CID_CC_MASK		0x0f000000	/* CoreCount (corerev >= 4) */
#define CID_CC_SHIFT		24

/* capabilities */
#define	CAP_UARTS_MASK		0x00000003	/* Number of uarts */
#define CAP_MIPSEB		0x00000004	/* MIPS is in big-endian mode */
#define CAP_UCLKSEL		0x00000018	/* UARTs clock select */
#define CAP_UINTCLK		0x00000008	/* UARTs are driven by internal divided clock */
#define CAP_UARTGPIO		0x00000020	/* UARTs own Gpio's 15:12 */
#define CAP_EXTBUS_MASK		0x000000c0	/* External bus mask */
#define CAP_EXTBUS_NONE		0x00000000	/* No ExtBus present */
#define CAP_EXTBUS_FULL		0x00000040	/* ExtBus: PCMCIA, IDE & Prog */
#define CAP_EXTBUS_PROG		0x00000080	/* ExtBus: ProgIf only */
#define	CAP_FLASH_MASK		0x00000700	/* Type of flash */
#define	CAP_PLL_MASK		0x00038000	/* Type of PLL */
#define CAP_PWR_CTL		0x00040000	/* Power control */
#define CAP_OTPSIZE		0x00380000	/* OTP Size (0 = none) */
#define CAP_OTPSIZE_SHIFT	19		/* OTP Size shift */
#define CAP_OTPSIZE_BASE	5		/* OTP Size base */
#define CAP_JTAGP		0x00400000	/* JTAG Master Present */
#define CAP_ROM			0x00800000	/* Internal boot rom active */
#define CAP_BKPLN64		0x08000000	/* 64-bit backplane */

/* PLL type */
#define PLL_NONE		0x00000000
#define PLL_TYPE1		0x00010000	/* 48Mhz base, 3 dividers */
#define PLL_TYPE2		0x00020000	/* 48Mhz, 4 dividers */
#define PLL_TYPE3		0x00030000	/* 25Mhz, 2 dividers */
#define PLL_TYPE4		0x00008000	/* 48Mhz, 4 dividers */
#define PLL_TYPE5		0x00018000	/* 25Mhz, 4 dividers */
#define PLL_TYPE6		0x00028000	/* 100/200 or 120/240 only */
#define PLL_TYPE7		0x00038000	/* 25Mhz, 4 dividers */

/* corecontrol */
#define CC_UARTCLKO		0x00000001	/* Drive UART with internal clock */
#define	CC_SE			0x00000002	/* sync clk out enable (corerev >= 3) */

/* chipcontrol */
#define CHIPCTRL_4321A0_DEFAULT	0x3a4		
#define CHIPCTRL_4321A1_DEFAULT	0x0a4		

/* Fields in the otpstatus register */
#define	OTPS_PROGFAIL		0x80000000
#define	OTPS_PROTECT		0x00000007
#define	OTPS_HW_PROTECT		0x00000001
#define	OTPS_SW_PROTECT		0x00000002
#define	OTPS_CID_PROTECT	0x00000004

/* Fields in the otpcontrol register */
#define	OTPC_RECWAIT		0xff000000
#define	OTPC_PROGWAIT		0x00ffff00
#define	OTPC_PRW_SHIFT		8
#define	OTPC_MAXFAIL		0x00000038
#define	OTPC_VSEL		0x00000006
#define	OTPC_SELVL		0x00000001

/* Fields in otpprog */
#define	OTPP_COL_MASK		0x000000ff
#define	OTPP_ROW_MASK		0x0000ff00
#define	OTPP_ROW_SHIFT		8
#define	OTPP_READERR		0x10000000
#define	OTPP_VALUE		0x20000000
#define	OTPP_VALUE_SHIFT		29
#define	OTPP_READ		0x40000000
#define	OTPP_START		0x80000000
#define	OTPP_BUSY		0x80000000

/* jtagcmd */
#define JCMD_START		0x80000000
#define JCMD_BUSY		0x80000000
#define JCMD_PAUSE		0x40000000
#define JCMD0_ACC_MASK		0x0000f000
#define JCMD0_ACC_IRDR		0x00000000
#define JCMD0_ACC_DR		0x00001000
#define JCMD0_ACC_IR		0x00002000
#define JCMD0_ACC_RESET		0x00003000
#define JCMD0_ACC_IRPDR		0x00004000
#define JCMD0_ACC_PDR		0x00005000
#define JCMD0_IRW_MASK		0x00000f00
#define JCMD_ACC_MASK		0x000f0000	/* Changes for corerev 11 */
#define JCMD_ACC_IRDR		0x00000000
#define JCMD_ACC_DR		0x00010000
#define JCMD_ACC_IR		0x00020000
#define JCMD_ACC_RESET		0x00030000
#define JCMD_ACC_IRPDR		0x00040000
#define JCMD_ACC_PDR		0x00050000
#define JCMD_IRW_MASK		0x00001f00
#define JCMD_IRW_SHIFT		8
#define JCMD_DRW_MASK		0x0000003f

/* jtagctrl */
#define JCTRL_FORCE_CLK		4		/* Force clock */
#define JCTRL_EXT_EN		2		/* Enable external targets */
#define JCTRL_EN		1		/* Enable Jtag master */

/* Fields in clkdiv */
#define	CLKD_SFLASH		0x0f000000
#define	CLKD_SFLASH_SHIFT	24
#define	CLKD_OTP		0x000f0000
#define	CLKD_OTP_SHIFT		16
#define	CLKD_JTAG		0x00000f00
#define	CLKD_JTAG_SHIFT		8
#define	CLKD_UART		0x000000ff

/* intstatus/intmask */
#define	CI_GPIO			0x00000001	/* gpio intr */
#define	CI_EI			0x00000002	/* ro: ext intr pin (corerev >= 3) */
#define	CI_WDRESET		0x80000000	/* watchdog reset occurred */

/* slow_clk_ctl */
#define SCC_SS_MASK		0x00000007	/* slow clock source mask */
#define	SCC_SS_LPO		0x00000000	/* source of slow clock is LPO */
#define	SCC_SS_XTAL		0x00000001	/* source of slow clock is crystal */
#define	SCC_SS_PCI		0x00000002	/* source of slow clock is PCI */
#define SCC_LF			0x00000200	/* LPOFreqSel, 1: 160Khz, 0: 32KHz */
#define SCC_LP			0x00000400	/* LPOPowerDown, 1: LPO is disabled,
						 * 0: LPO is enabled
						 */
#define SCC_FS			0x00000800	/* ForceSlowClk, 1: sb/cores running on slow clock,
						 * 0: power logic control
						 */
#define SCC_IP			0x00001000	/* IgnorePllOffReq, 1/0: power logic ignores/honors
						 * PLL clock disable requests from core
						 */
#define SCC_XC			0x00002000	/* XtalControlEn, 1/0: power logic does/doesn't
						 * disable crystal when appropriate
						 */
#define SCC_XP			0x00004000	/* XtalPU (RO), 1/0: crystal running/disabled */
#define SCC_CD_MASK		0xffff0000	/* ClockDivider (SlowClk = 1/(4+divisor)) */
#define SCC_CD_SHIFT		16

/* system_clk_ctl */
#define	SYCC_IE			0x00000001	/* ILPen: Enable Idle Low Power */
#define	SYCC_AE			0x00000002	/* ALPen: Enable Active Low Power */
#define	SYCC_FP			0x00000004	/* ForcePLLOn */
#define	SYCC_AR			0x00000008	/* Force ALP (or HT if ALPen is not set */
#define	SYCC_HR			0x00000010	/* Force HT */
#define SYCC_CD_MASK		0xffff0000	/* ClkDiv  (ILP = 1/(4 * (divisor + 1)) */
#define SYCC_CD_SHIFT		16

/* gpiotimerval */
#define GPIO_ONTIME_SHIFT	16

/* clockcontrol_n */
#define	CN_N1_MASK		0x3f		/* n1 control */
#define	CN_N2_MASK		0x3f00		/* n2 control */
#define	CN_N2_SHIFT		8
#define	CN_PLLC_MASK		0xf0000		/* pll control */
#define	CN_PLLC_SHIFT		16

/* clockcontrol_sb/pci/uart */
#define	CC_M1_MASK		0x3f		/* m1 control */
#define	CC_M2_MASK		0x3f00		/* m2 control */
#define	CC_M2_SHIFT		8
#define	CC_M3_MASK		0x3f0000	/* m3 control */
#define	CC_M3_SHIFT		16
#define	CC_MC_MASK		0x1f000000	/* mux control */
#define	CC_MC_SHIFT		24

/* N3M Clock control magic field values */
#define	CC_F6_2			0x02		/* A factor of 2 in */
#define	CC_F6_3			0x03		/* 6-bit fields like */
#define	CC_F6_4			0x05		/* N1, M1 or M3 */
#define	CC_F6_5			0x09
#define	CC_F6_6			0x11
#define	CC_F6_7			0x21

#define	CC_F5_BIAS		5		/* 5-bit fields get this added */

#define	CC_MC_BYPASS		0x08
#define	CC_MC_M1		0x04
#define	CC_MC_M1M2		0x02
#define	CC_MC_M1M2M3		0x01
#define	CC_MC_M1M3		0x11

/* Type 2 Clock control magic field values */
#define	CC_T2_BIAS		2		/* n1, n2, m1 & m3 bias */
#define	CC_T2M2_BIAS		3		/* m2 bias */

#define	CC_T2MC_M1BYP		1
#define	CC_T2MC_M2BYP		2
#define	CC_T2MC_M3BYP		4

/* Type 6 Clock control magic field values */
#define	CC_T6_MMASK		1		/* bits of interest in m */
#define	CC_T6_M0		120000000	/* sb clock for m = 0 */
#define	CC_T6_M1		100000000	/* sb clock for m = 1 */
#define	SB2MIPS_T6(sb)		(2 * (sb))

/* Common clock base */
#define	CC_CLOCK_BASE1		24000000	/* Half the clock freq */
#define CC_CLOCK_BASE2		12500000	/* Alternate crystal on some PLL's */

/* Clock control values for 200Mhz in 5350 */
#define	CLKC_5350_N		0x0311
#define	CLKC_5350_M		0x04020009

/* Flash types in the chipcommon capabilities register */
#define FLASH_NONE		0x000		/* No flash */
#define SFLASH_ST		0x100		/* ST serial flash */
#define SFLASH_AT		0x200		/* Atmel serial flash */
#define	PFLASH			0x700		/* Parallel flash */

/* Bits in the ExtBus config registers */
#define	CC_CFG_EN		0x0001		/* Enable */
#define	CC_CFG_EM_MASK		0x000e		/* Extif Mode */
#define	CC_CFG_EM_ASYNC		0x0000		/*   Async/Parallel flash */
#define	CC_CFG_EM_SYNC		0x0002		/*   Synchronous */
#define	CC_CFG_EM_PCMCIA	0x0004		/*   PCMCIA */
#define	CC_CFG_EM_IDE		0x0006		/*   IDE */
#define	CC_CFG_DS		0x0010		/* Data size, 0=8bit, 1=16bit */
#define	CC_CFG_CD_MASK		0x0060		/* Sync: Clock divisor */
#define	CC_CFG_CE		0x0080		/* Sync: Clock enable */
#define	CC_CFG_SB		0x0100		/* Sync: Size/Bytestrobe */

/* ExtBus address space */
#define	CC_EB_BASE		0x1a000000	/* Chipc ExtBus base address */
#define	CC_EB_PCMCIA_MEM	0x1a000000	/* PCMCIA 0 memory base address */
#define	CC_EB_PCMCIA_IO		0x1a200000	/* PCMCIA 0 I/O base address */
#define	CC_EB_PCMCIA_CFG	0x1a400000	/* PCMCIA 0 config base address */
#define	CC_EB_IDE		0x1a800000	/* IDE memory base */
#define	CC_EB_PCMCIA1_MEM	0x1a800000	/* PCMCIA 1 memory base address */
#define	CC_EB_PCMCIA1_IO	0x1aa00000	/* PCMCIA 1 I/O base address */
#define	CC_EB_PCMCIA1_CFG	0x1ac00000	/* PCMCIA 1 config base address */
#define	CC_EB_PROGIF		0x1b000000	/* ProgIF Async/Sync base address */


/* Start/busy bit in flashcontrol */
#define SFLASH_OPCODE		0x000000ff
#define SFLASH_ACTION		0x00000700
#define SFLASH_START		0x80000000
#define SFLASH_BUSY		SFLASH_START

/* flashcontrol action codes */
#define	SFLASH_ACT_OPONLY	0x0000		/* Issue opcode only */
#define	SFLASH_ACT_OP1D		0x0100		/* opcode + 1 data byte */
#define	SFLASH_ACT_OP3A		0x0200		/* opcode + 3 address bytes */
#define	SFLASH_ACT_OP3A1D	0x0300		/* opcode + 3 addres & 1 data bytes */
#define	SFLASH_ACT_OP3A4D	0x0400		/* opcode + 3 addres & 4 data bytes */
#define	SFLASH_ACT_OP3A4X4D	0x0500		/* opcode + 3 addres, 4 don't care & 4 data bytes */
#define	SFLASH_ACT_OP3A1X4D	0x0700		/* opcode + 3 addres, 1 don't care & 4 data bytes */

/* flashcontrol action+opcodes for ST flashes */
#define SFLASH_ST_WREN		0x0006		/* Write Enable */
#define SFLASH_ST_WRDIS		0x0004		/* Write Disable */
#define SFLASH_ST_RDSR		0x0105		/* Read Status Register */
#define SFLASH_ST_WRSR		0x0101		/* Write Status Register */
#define SFLASH_ST_READ		0x0303		/* Read Data Bytes */
#define SFLASH_ST_PP		0x0302		/* Page Program */
#define SFLASH_ST_SE		0x02d8		/* Sector Erase */
#define SFLASH_ST_BE		0x00c7		/* Bulk Erase */
#define SFLASH_ST_DP		0x00b9		/* Deep Power-down */
#define SFLASH_ST_RES		0x03ab		/* Read Electronic Signature */

/* Status register bits for ST flashes */
#define SFLASH_ST_WIP		0x01		/* Write In Progress */
#define SFLASH_ST_WEL		0x02		/* Write Enable Latch */
#define SFLASH_ST_BP_MASK	0x1c		/* Block Protect */
#define SFLASH_ST_BP_SHIFT	2
#define SFLASH_ST_SRWD		0x80		/* Status Register Write Disable */

/* flashcontrol action+opcodes for Atmel flashes */
#define SFLASH_AT_READ				0x07e8
#define SFLASH_AT_PAGE_READ			0x07d2
#define SFLASH_AT_BUF1_READ
#define SFLASH_AT_BUF2_READ
#define SFLASH_AT_STATUS			0x01d7
#define SFLASH_AT_BUF1_WRITE			0x0384
#define SFLASH_AT_BUF2_WRITE			0x0387
#define SFLASH_AT_BUF1_ERASE_PROGRAM		0x0283
#define SFLASH_AT_BUF2_ERASE_PROGRAM		0x0286
#define SFLASH_AT_BUF1_PROGRAM			0x0288
#define SFLASH_AT_BUF2_PROGRAM			0x0289
#define SFLASH_AT_PAGE_ERASE			0x0281
#define SFLASH_AT_BLOCK_ERASE			0x0250
#define SFLASH_AT_BUF1_WRITE_ERASE_PROGRAM	0x0382
#define SFLASH_AT_BUF2_WRITE_ERASE_PROGRAM	0x0385
#define SFLASH_AT_BUF1_LOAD			0x0253
#define SFLASH_AT_BUF2_LOAD			0x0255
#define SFLASH_AT_BUF1_COMPARE			0x0260
#define SFLASH_AT_BUF2_COMPARE			0x0261
#define SFLASH_AT_BUF1_REPROGRAM		0x0258
#define SFLASH_AT_BUF2_REPROGRAM		0x0259

/* Status register bits for Atmel flashes */
#define SFLASH_AT_READY				0x80
#define SFLASH_AT_MISMATCH			0x40
#define SFLASH_AT_ID_MASK			0x38
#define SFLASH_AT_ID_SHIFT			3

/* OTP regions */
#define	OTP_HW_REGION	OTPS_HW_PROTECT
#define	OTP_SW_REGION	OTPS_SW_PROTECT
#define	OTP_CID_REGION	OTPS_CID_PROTECT

/* OTP regions (Byte offsets from otp size) */
#define	OTP_SWLIM_OFF	(-8)
#define	OTP_CIDBASE_OFF	0
#define	OTP_CIDLIM_OFF	8

/* Predefined OTP words (Word offset from otp size) */
#define	OTP_BOUNDARY_OFF (-4)
#define	OTP_HWSIGN_OFF	(-3)
#define	OTP_SWSIGN_OFF	(-2)
#define	OTP_CIDSIGN_OFF	(-1)

#define	OTP_CID_OFF	0
#define	OTP_PKG_OFF	1
#define	OTP_FID_OFF	2
#define	OTP_RSV_OFF	3
#define	OTP_LIM_OFF	4

#define	OTP_SIGNATURE	0x578a
#define	OTP_MAGIC	0x4e56

/* 
 * These are the UART port assignments, expressed as offsets from the base
 * register.  These assignments should hold for any serial port based on
 * a 8250, 16450, or 16550(A).
 */

#define UART_RX		0	/* In:  Receive buffer (DLAB=0) */
#define UART_TX		0	/* Out: Transmit buffer (DLAB=0) */
#define UART_DLL	0	/* Out: Divisor Latch Low (DLAB=1) */
#define UART_IER	1	/* In/Out: Interrupt Enable Register (DLAB=0) */
#define UART_DLM	1	/* Out: Divisor Latch High (DLAB=1) */
#define UART_IIR	2	/* In: Interrupt Identity Register  */
#define UART_FCR	2	/* Out: FIFO Control Register */
#define UART_LCR	3	/* Out: Line Control Register */
#define UART_MCR	4	/* Out: Modem Control Register */
#define UART_LSR	5	/* In:  Line Status Register */
#define UART_MSR	6	/* In:  Modem Status Register */
#define UART_SCR	7	/* I/O: Scratch Register */
#define UART_LCR_DLAB	0x80	/* Divisor latch access bit */
#define UART_LCR_WLEN8	0x03	/* Wordlength: 8 bits */
#define UART_MCR_OUT2	0x08	/* MCR GPIO out 2 */
#define UART_MCR_LOOP	0x10	/* Enable loopback test mode */
#define UART_LSR_THRE	0x20	/* Transmit-hold-register empty */
#define UART_LSR_RXRDY	0x01	/* Receiver ready */
#define UART_FCR_FIFO_ENABLE 1	/* FIFO control register bit controlling FIFO enable/disable */

/* Interrupt Enable Register (IER) bits */
#define UART_IER_EDSSI	8	/* enable modem status interrupt */
#define UART_IER_ELSI	4	/* enable receiver line status interrupt */
#define UART_IER_ETBEI  2	/* enable transmitter holding register empty interrupt */
#define UART_IER_ERBFI	1	/* enable data available interrupt */

#endif	/* _SBCHIPC_H */