1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_SERIAL_SCI_H
3 #define __LINUX_SERIAL_SCI_H
4 
5 #include <linux/bitops.h>
6 #include <linux/serial_core.h>
7 #include <linux/sh_dma.h>
8 
9 /*
10  * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
11  */
12 
13 /* Serial Control Register (@ = not supported by all parts) */
14 #define SCSCR_TIE	BIT(7)	/* Transmit Interrupt Enable */
15 #define SCSCR_RIE	BIT(6)	/* Receive Interrupt Enable */
16 #define SCSCR_TE	BIT(5)	/* Transmit Enable */
17 #define SCSCR_RE	BIT(4)	/* Receive Enable */
18 #define SCSCR_REIE	BIT(3)	/* Receive Error Interrupt Enable @ */
19 #define SCSCR_TOIE	BIT(2)	/* Timeout Interrupt Enable @ */
20 #define SCSCR_CKE1	BIT(1)	/* Clock Enable 1 */
21 #define SCSCR_CKE0	BIT(0)	/* Clock Enable 0 */
22 
23 
24 enum {
25 	SCIx_PROBE_REGTYPE,
26 
27 	SCIx_SCI_REGTYPE,
28 	SCIx_IRDA_REGTYPE,
29 	SCIx_SCIFA_REGTYPE,
30 	SCIx_SCIFB_REGTYPE,
31 	SCIx_SH2_SCIF_FIFODATA_REGTYPE,
32 	SCIx_SH3_SCIF_REGTYPE,
33 	SCIx_SH4_SCIF_REGTYPE,
34 	SCIx_SH4_SCIF_BRG_REGTYPE,
35 	SCIx_SH4_SCIF_NO_SCSPTR_REGTYPE,
36 	SCIx_SH4_SCIF_FIFODATA_REGTYPE,
37 	SCIx_SH7705_SCIF_REGTYPE,
38 	SCIx_HSCIF_REGTYPE,
39 	SCIx_RZ_SCIFA_REGTYPE,
40 
41 	SCIx_NR_REGTYPES,
42 };
43 
44 struct plat_sci_port_ops {
45 	void (*init_pins)(struct uart_port *, unsigned int cflag);
46 };
47 
48 /*
49  * Platform device specific platform_data struct
50  */
51 struct plat_sci_port {
52 	unsigned int	type;			/* SCI / SCIF / IRDA / HSCIF */
53 	upf_t		flags;			/* UPF_* flags */
54 
55 	unsigned int	sampling_rate;
56 	unsigned int	scscr;			/* SCSCR initialization */
57 
58 	/*
59 	 * Platform overrides if necessary, defaults otherwise.
60 	 */
61 	unsigned char	regtype;
62 
63 	struct plat_sci_port_ops	*ops;
64 };
65 
66 #endif /* __LINUX_SERIAL_SCI_H */
67