summaryrefslogtreecommitdiffstats
path: root/drivers/tty/serial/sh-sci.h
blob: fb176025042185c44c7ae0ec2eeaa3134393219e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
#include <linux/bitops.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <linux/gpio.h>

#define SCI_MAJOR		204
#define SCI_MINOR_START		8


/*
 * SCI register subset common for all port types.
 * Not all registers will exist on all parts.
 */
enum {
	SCSMR,				/* Serial Mode Register */
	SCBRR,				/* Bit Rate Register */
	SCSCR,				/* Serial Control Register */
	SCxSR,				/* Serial Status Register */
	SCFCR,				/* FIFO Control Register */
	SCFDR,				/* FIFO Data Count Register */
	SCxTDR,				/* Transmit (FIFO) Data Register */
	SCxRDR,				/* Receive (FIFO) Data Register */
	SCLSR,				/* Line Status Register */
	SCTFDR,				/* Transmit FIFO Data Count Register */
	SCRFDR,				/* Receive FIFO Data Count Register */
	SCSPTR,				/* Serial Port Register */
	HSSRR,				/* Sampling Rate Register */
	SCPCR,				/* Serial Port Control Register */
	SCPDR,				/* Serial Port Data Register */
	SCDL,				/* BRG Frequency Division Register */
	SCCKS,				/* BRG Clock Select Register */

	SCIx_NR_REGS,
};


/* SCSMR (Serial Mode Register) */
#define SCSMR_CHR	BIT(6)	/* 7-bit Character Length */
#define SCSMR_PE	BIT(5)	/* Parity Enable */
#define SCSMR_ODD	BIT(4)	/* Odd Parity */
#define SCSMR_STOP	BIT(3)	/* Stop Bit Length */
#define SCSMR_CKS	0x0003	/* Clock Select */

/* Serial Control Register, SCIFA/SCIFB only bits */
#define SCSCR_TDRQE	BIT(15)	/* Tx Data Transfer Request Enable */
#define SCSCR_RDRQE	BIT(14)	/* Rx Data Transfer Request Enable */

/* SCxSR (Serial Status Register) on SCI */
#define SCI_TDRE	BIT(7)	/* Transmit Data Register Empty */
#define SCI_RDRF	BIT(6)	/* Receive Data Register Full */
#define SCI_ORER	BIT(5)	/* Overrun Error */
#define SCI_FER		BIT(4)	/* Framing Error */
#define SCI_PER		BIT(3)	/* Parity Error */
#define SCI_TEND	BIT(2)	/* Transmit End */
#define SCI_RESERVED	0x03	/* All reserved bits */

#define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)

#define SCI_RDxF_CLEAR	(u32)(~(SCI_RESERVED | SCI_RDRF))
#define SCI_ERROR_CLEAR	(u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))
#define SCI_TDxE_CLEAR	(u32)(~(SCI_RESERVED | SCI_TEND | SCI_TDRE))
#define SCI_BREAK_CLEAR	(u32)(~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER))

/* SCxSR (Serial Status Register) on SCIF, SCIFA, SCIFB, HSCIF */
#define SCIF_ER		BIT(7)	/* Receive Error */
#define SCIF_TEND	BIT(6)	/* Transmission End */
#define SCIF_TDFE	BIT(5)	/* Transmit FIFO Data Empty */
#define SCIF_BRK	BIT(4)	/* Break Detect */
#define SCIF_FER	BIT(3)	/* Framing Error */
#define SCIF_PER	BIT(2)	/* Parity Error */
#define SCIF_RDF	BIT(1)	/* Receive FIFO Data Full */
#define SCIF_DR		BIT(0)	/* Receive Data Ready */
/* SCIF only (optional) */
#define SCIF_PERC	0xf000	/* Number of Parity Errors */
#define SCIF_FERC	0x0f00	/* Number of Framing Errors */
/*SCIFA/SCIFB and SCIF on SH7705/SH7720/SH7721 only */
#define SCIFA_ORER	BIT(9)	/* Overrun Error */

#define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_BRK | SCIF_ER)

#define SCIF_RDxF_CLEAR		(u32)(~(SCIF_DR | SCIF_RDF))
#define SCIF_ERROR_CLEAR	(u32)(~(SCIF_PER | SCIF_FER | SCIF_ER))
#define SCIF_TDxE_CLEAR		(u32)(~(SCIF_TDFE))
#define SCIF_BREAK_CLEAR	(u32)(~(SCIF_PER | SCIF_FER | SCIF_BRK))

/* SCFCR (FIFO Control Register) */
#define SCFCR_MCE	BIT(3)	/* Modem Control Enable */
#define SCFCR_TFRST	BIT(2)	/* Transmit FIFO Data Register Reset */
#define SCFCR_RFRST	BIT(1)	/* Receive FIFO Data Register Reset */
#define SCFCR_LOOP	BIT(0)	/* Loopback Test */

/* SCLSR (Line Status Register) on (H)SCIF */
#define SCLSR_ORER	BIT(0)	/* Overrun Error */

/* SCSPTR (Serial Port Register), optional */
#define SCSPTR_RTSIO	BIT(7)	/* Serial Port RTS Pin Input/Output */
#define SCSPTR_RTSDT	BIT(6)	/* Serial Port RTS Pin Data */
#define SCSPTR_CTSIO	BIT(5)	/* Serial Port CTS Pin Input/Output */
#define SCSPTR_CTSDT	BIT(4)	/* Serial Port CTS Pin Data */
#define SCSPTR_SPB2IO	BIT(1)	/* Serial Port Break Input/Output */
#define SCSPTR_SPB2DT	BIT(0)	/* Serial Port Break Data */

/* HSSRR HSCIF */
#define HSCIF_SRE	BIT(15)	/* Sampling Rate Register Enable */

/* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */
#define SCPCR_RTSC	BIT(4)	/* Serial Port RTS Pin / Output Pin */
#define SCPCR_CTSC	BIT(3)	/* Serial Port CTS Pin / Input Pin */

/* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */
#define SCPDR_RTSD	BIT(4)	/* Serial Port RTS Output Pin Data */
#define SCPDR_CTSD	BIT(3)	/* Serial Port CTS Input Pin Data */

/*
 * BRG Clock Select Register (Some SCIF and HSCIF)
 * The Baud Rate Generator for external clock can provide a clock source for
 * the sampling clock. It outputs either its frequency divided clock, or the
 * (undivided) (H)SCK external clock.
 */
#define SCCKS_CKS	BIT(15)	/* Select (H)SCK (1) or divided SC_CLK (0) */
#define SCCKS_XIN	BIT(14)	/* SC_CLK uses bus clock (1) or SCIF_CLK (0) */

#define SCxSR_TEND(port)	(((port)->type == PORT_SCI) ? SCI_TEND   : SCIF_TEND)
#define SCxSR_RDxF(port)	(((port)->type == PORT_SCI) ? SCI_RDRF   : SCIF_RDF)
#define SCxSR_TDxE(port)	(((port)->type == PORT_SCI) ? SCI_TDRE   : SCIF_TDFE)
#define SCxSR_FER(port)		(((port)->type == PORT_SCI) ? SCI_FER    : SCIF_FER)
#define SCxSR_PER(port)		(((port)->type == PORT_SCI) ? SCI_PER    : SCIF_PER)
#define SCxSR_BRK(port)		(((port)->type == PORT_SCI) ? 0x00       : SCIF_BRK)

#define SCxSR_ERRORS(port)	(to_sci_port(port)->error_mask)

#define SCxSR_RDxF_CLEAR(port) \
	(((port)->type == PORT_SCI) ? SCI_RDxF_CLEAR : SCIF_RDxF_CLEAR)
#define SCxSR_ERROR_CLEAR(port) \
	(to_sci_port(port)->error_clear)
#define SCxSR_TDxE_CLEAR(port) \
	(((port)->type == PORT_SCI) ? SCI_TDxE_CLEAR : SCIF_TDxE_CLEAR)
#define SCxSR_BREAK_CLEAR(port) \
	(((port)->type == PORT_SCI) ? SCI_BREAK_CLEAR : SCIF_BREAK_CLEAR)