[people/ms/u-boot.git] / include / ns16550.h

/*
 * NS16550 Serial Port
 * originally from linux source (arch/ppc/boot/ns16550.h)
 * modified slightly to
 * have addresses as offsets from CFG_ISA_BASE
 * added a few more definitions
 * added prototypes for ns16550.c
 * reduced no of com ports to 2
 * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
 */

#if (CFG_NS16550_REG_SIZE == 1)
struct NS16550 {
	unsigned char rbr;		/* 0 */
	unsigned char ier;		/* 1 */
	unsigned char fcr;		/* 2 */
	unsigned char lcr;		/* 3 */
	unsigned char mcr;		/* 4 */
	unsigned char lsr;		/* 5 */
	unsigned char msr;		/* 6 */
	unsigned char scr;		/* 7 */
} __attribute__ ((packed));
#elif (CFG_NS16550_REG_SIZE == 2)
struct NS16550 {
	unsigned short rbr;		/* 0 */
	unsigned short ier;		/* 1 */
	unsigned short fcr;		/* 2 */
	unsigned short lcr;		/* 3 */
	unsigned short mcr;		/* 4 */
	unsigned short lsr;		/* 5 */
	unsigned short msr;		/* 6 */
	unsigned short scr;		/* 7 */
} __attribute__ ((packed));
#elif (CFG_NS16550_REG_SIZE == 4)
struct NS16550 {
	unsigned long rbr;		/* 0 */
	unsigned long ier;		/* 1 */
	unsigned long fcr;		/* 2 */
	unsigned long lcr;		/* 3 */
	unsigned long mcr;		/* 4 */
	unsigned long lsr;		/* 5 */
	unsigned long msr;		/* 6 */
	unsigned long scr;		/* 7 */
} __attribute__ ((packed));
#elif (CFG_NS16550_REG_SIZE == -4)
struct NS16550 {
	unsigned char rbr;		/* 0 */
	int pad1:24;
	unsigned char ier;		/* 1 */
	int pad2:24;
	unsigned char fcr;		/* 2 */
	int pad3:24;
	unsigned char lcr;		/* 3 */
	int pad4:24;
	unsigned char mcr;		/* 4 */
	int pad5:24;
	unsigned char lsr;		/* 5 */
	int pad6:24;
	unsigned char msr;		/* 6 */
	int pad7:24;
	unsigned char scr;		/* 7 */
	int pad8:24;
} __attribute__ ((packed));
#else
#error "Please define NS16550 registers size."
#endif

#define thr rbr
#define iir fcr
#define dll rbr
#define dlm ier

typedef volatile struct NS16550 *NS16550_t;

#define FCR_FIFO_EN     0x01		/* Fifo enable */
#define FCR_RXSR        0x02		/* Receiver soft reset */
#define FCR_TXSR        0x04		/* Transmitter soft reset */

#define MCR_DTR         0x01
#define MCR_RTS         0x02
#define MCR_DMA_EN      0x04
#define MCR_TX_DFR      0x08

#define LCR_WLS_MSK	0x03		/* character length slect mask */
#define LCR_WLS_5	0x00		/* 5 bit character length */
#define LCR_WLS_6	0x01		/* 6 bit character length */
#define LCR_WLS_7	0x02		/* 7 bit character length */
#define LCR_WLS_8	0x03		/* 8 bit character length */
#define LCR_STB		0x04		/* Number of stop Bits, off = 1, on = 1.5 or 2) */
#define LCR_PEN		0x08		/* Parity eneble */
#define LCR_EPS		0x10		/* Even Parity Select */
#define LCR_STKP	0x20		/* Stick Parity */
#define LCR_SBRK	0x40		/* Set Break */
#define LCR_BKSE	0x80		/* Bank select enable */

#define LSR_DR		0x01		/* Data ready */
#define LSR_OE		0x02		/* Overrun */
#define LSR_PE		0x04		/* Parity error */
#define LSR_FE		0x08		/* Framing error */
#define LSR_BI		0x10		/* Break */
#define LSR_THRE	0x20		/* Xmit holding register empty */
#define LSR_TEMT	0x40		/* Xmitter empty */
#define LSR_ERR		0x80		/* Error */

/* useful defaults for LCR */
#define LCR_8N1		0x03

void	NS16550_init   (NS16550_t com_port, int baud_divisor);
void	NS16550_putc   (NS16550_t com_port, char c);
char	NS16550_getc   (NS16550_t com_port);
int	NS16550_tstc   (NS16550_t com_port);
void	NS16550_reinit (NS16550_t com_port, int baud_divisor);
Commit	Line	Data
717b5aad WD	1	/*
	2	* NS16550 Serial Port
	3	* originally from linux source (arch/ppc/boot/ns16550.h)
	4	* modified slightly to
	5	* have addresses as offsets from CFG_ISA_BASE
	6	* added a few more definitions
	7	* added prototypes for ns16550.c
	8	* reduced no of com ports to 2
	9	* modifications (c) Rob Taylor, Flying Pig Systems. 2000.
	10	*/
	11
	12	#if (CFG_NS16550_REG_SIZE == 1)
	13	struct NS16550 {
	14	unsigned char rbr; /* 0 */
	15	unsigned char ier; /* 1 */
	16	unsigned char fcr; /* 2 */
	17	unsigned char lcr; /* 3 */
	18	unsigned char mcr; /* 4 */
	19	unsigned char lsr; /* 5 */
	20	unsigned char msr; /* 6 */
	21	unsigned char scr; /* 7 */
	22	} __attribute__ ((packed));
	23	#elif (CFG_NS16550_REG_SIZE == 2)
	24	struct NS16550 {
	25	unsigned short rbr; /* 0 */
	26	unsigned short ier; /* 1 */
	27	unsigned short fcr; /* 2 */
	28	unsigned short lcr; /* 3 */
	29	unsigned short mcr; /* 4 */
	30	unsigned short lsr; /* 5 */
	31	unsigned short msr; /* 6 */
	32	unsigned short scr; /* 7 */
	33	} __attribute__ ((packed));
	34	#elif (CFG_NS16550_REG_SIZE == 4)
	35	struct NS16550 {
	36	unsigned long rbr; /* 0 */
	37	unsigned long ier; /* 1 */
	38	unsigned long fcr; /* 2 */
	39	unsigned long lcr; /* 3 */
	40	unsigned long mcr; /* 4 */
	41	unsigned long lsr; /* 5 */
	42	unsigned long msr; /* 6 */
	43	unsigned long scr; /* 7 */
	44	} __attribute__ ((packed));
	45	#elif (CFG_NS16550_REG_SIZE == -4)
	46	struct NS16550 {
	47	unsigned char rbr; /* 0 */
	48	int pad1:24;
	49	unsigned char ier; /* 1 */
	50	int pad2:24;
	51	unsigned char fcr; /* 2 */
	52	int pad3:24;
	53	unsigned char lcr; /* 3 */
	54	int pad4:24;
	55	unsigned char mcr; /* 4 */
	56	int pad5:24;
	57	unsigned char lsr; /* 5 */
	58	int pad6:24;
	59	unsigned char msr; /* 6 */
	60	int pad7:24;
	61	unsigned char scr; /* 7 */
	62	int pad8:24;
	63	} __attribute__ ((packed));
	64	#else
65	#error "Please define NS16550 registers size."
66	#endif
67
68	#define thr rbr
69	#define iir fcr
70	#define dll rbr
71	#define dlm ier
72
73	typedef volatile struct NS16550 *NS16550_t;
74
75	#define FCR_FIFO_EN 0x01 /* Fifo enable */
76	#define FCR_RXSR 0x02 /* Receiver soft reset */
77	#define FCR_TXSR 0x04 /* Transmitter soft reset */
78
79	#define MCR_DTR 0x01
80	#define MCR_RTS 0x02
81	#define MCR_DMA_EN 0x04
82	#define MCR_TX_DFR 0x08
83
84	#define LCR_WLS_MSK 0x03 /* character length slect mask */
85	#define LCR_WLS_5 0x00 /* 5 bit character length */
86	#define LCR_WLS_6 0x01 /* 6 bit character length */
87	#define LCR_WLS_7 0x02 /* 7 bit character length */
88	#define LCR_WLS_8 0x03 /* 8 bit character length */
89	#define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */
90	#define LCR_PEN 0x08 /* Parity eneble */
91	#define LCR_EPS 0x10 /* Even Parity Select */
92	#define LCR_STKP 0x20 /* Stick Parity */
93	#define LCR_SBRK 0x40 /* Set Break */
94	#define LCR_BKSE 0x80 /* Bank select enable */
95
96	#define LSR_DR 0x01 /* Data ready */
97	#define LSR_OE 0x02 /* Overrun */
98	#define LSR_PE 0x04 /* Parity error */
99	#define LSR_FE 0x08 /* Framing error */
100	#define LSR_BI 0x10 /* Break */
101	#define LSR_THRE 0x20 /* Xmit holding register empty */
102	#define LSR_TEMT 0x40 /* Xmitter empty */
103	#define LSR_ERR 0x80 /* Error */
104
105	/* useful defaults for LCR */
106	#define LCR_8N1 0x03
107
108	void NS16550_init (NS16550_t com_port, int baud_divisor);
109	void NS16550_putc (NS16550_t com_port, char c);
110	char NS16550_getc (NS16550_t com_port);
111	int NS16550_tstc (NS16550_t com_port);
112	void NS16550_reinit (NS16550_t com_port, int baud_divisor);