aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/serial_sci.h
blob: a2afc9fbe1869369d3d8c3165091ab3e9f73c46f (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
#ifndef __LINUX_SERIAL_SCI_H
#define __LINUX_SERIAL_SCI_H

#include <linux/serial_core.h>
#include <linux/sh_dma.h>

/*
 * Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
 */

enum {
	SCBRR_ALGO_1,		/* ((clk + 16 * bps) / (16 * bps) - 1) */
	SCBRR_ALGO_2,		/* ((clk + 16 * bps) / (32 * bps) - 1) */
	SCBRR_ALGO_3,		/* (((clk * 2) + 16 * bps) / (16 * bps) - 1) */
	SCBRR_ALGO_4,		/* (((clk * 2) + 16 * bps) / (32 * bps) - 1) */
	SCBRR_ALGO_5,		/* (((clk * 1000 / 32) / bps) - 1) */
};

#define SCSCR_TIE	(1 << 7)
#define SCSCR_RIE	(1 << 6)
#define SCSCR_TE	(1 << 5)
#define SCSCR_RE	(1 << 4)
#define SCSCR_REIE	(1 << 3)	/* not supported by all parts */
#define SCSCR_TOIE	(1 << 2)	/* not supported by all parts */
#define SCSCR_CKE1	(1 << 1)
#define SCSCR_CKE0	(1 << 0)

/* Offsets into the sci_port->irqs array */
enum {
	SCIx_ERI_IRQ,
	SCIx_RXI_IRQ,
	SCIx_TXI_IRQ,
	SCIx_BRI_IRQ,
	SCIx_NR_IRQS,
};

#define SCIx_IRQ_MUXED(irq)		\
{					\
	[SCIx_ERI_IRQ]	= (irq),	\
	[SCIx_RXI_IRQ]	= (irq),	\
	[SCIx_TXI_IRQ]	= (irq),	\
	[SCIx_BRI_IRQ]	= (irq),	\
}

struct device;

/*
 * Platform device specific platform_data struct
 */
struct plat_sci_port {
	unsigned long	mapbase;		/* resource base */
	unsigned int	irqs[SCIx_NR_IRQS];	/* ERI, RXI, TXI, BRI */
	unsigned int	type;			/* SCI / SCIF / IRDA */
	upf_t		flags;			/* UPF_* flags */

	unsigned int	scbrr_algo_id;		/* SCBRR calculation algo */
	unsigned int	scscr;			/* SCSCR initialization */

	struct device	*dma_dev;

	unsigned int	dma_slave_tx;
	unsigned int	dma_slave_rx;
};

#endif /* __LINUX_SERIAL_SCI_H */