drivers/serial/serial_sh.h

/*
 * Copy and modify from linux/drivers/serial/sh-sci.h
 */

#include <dm/platform_data/serial_sh.h>

struct uart_port {
	unsigned long	iobase;		/* in/out[bwl] */
	unsigned char	*membase;	/* read/write[bwl] */
	unsigned long	mapbase;	/* for ioremap */
	enum sh_serial_type type;	/* port type */
	enum sh_clk_mode clk_mode;	/* clock mode */
};

#if defined(CONFIG_CPU_SH7721) || \
	defined(CONFIG_R8A7740)
# define SCSCR_INIT(port)  0x0030 /* TIE=0,RIE=0,TE=1,RE=1 */
# define PORT_PTCR	   0xA405011EUL
# define PORT_PVCR	   0xA4050122UL
# define SCIF_ORER	   0x0200   /* overrun error bit */
#elif defined(CONFIG_CPU_SH7750)  || \
	defined(CONFIG_CPU_SH7750R) || \
	defined(CONFIG_CPU_SH7750S) || \
	defined(CONFIG_CPU_SH7751)  || \
	defined(CONFIG_CPU_SH7751R)
# define SCSPTR1 0xffe0001c /* 8  bit SCI */
# define SCSPTR2 0xFFE80020 /* 16 bit SCIF */
# define SCIF_ORER 0x0001   /* overrun error bit */
# define SCSCR_INIT(port) (((port)->type == PORT_SCI) ? \
	0x30 /* TIE=0,RIE=0,TE=1,RE=1 */ : \
	0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */)
#elif defined(CONFIG_CPU_SH7722)
# define PADR			0xA4050120
# undef PSDR
# define PSDR			0xA405013e
# define PWDR			0xA4050166
# define PSCR			0xA405011E
# define SCIF_ORER		0x0001	/* overrun error bit */
# define SCSCR_INIT(port)	0x0038	/* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
#elif defined(CONFIG_CPU_SH7723)
# define SCSPTR0                0xa4050160
# define SCSPTR1                0xa405013e
# define SCSPTR2                0xa4050160
# define SCSPTR3                0xa405013e
# define SCSPTR4                0xa4050128
# define SCSPTR5                0xa4050128
# define SCIF_ORER              0x0001  /* overrun error bit */
# define SCSCR_INIT(port)       0x0038  /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
#elif defined(CONFIG_CPU_SH7734)
# define SCSPTR0 0xFFE40020
# define SCSPTR1 0xFFE41020
# define SCSPTR2 0xFFE42020
# define SCSPTR3 0xFFE43020
# define SCSPTR4 0xFFE44020
# define SCSPTR5 0xFFE45020
# define SCIF_ORER 0x0001  /* overrun error bit */
# define SCSCR_INIT(port) 0x0038  /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
#elif defined(CONFIG_CPU_SH7757) || \
	defined(CONFIG_CPU_SH7752) || \
	defined(CONFIG_CPU_SH7753)
# define SCSPTR0 0xfe4b0020
# define SCSPTR1 0xfe4b0020
# define SCSPTR2 0xfe4b0020
# define SCIF_ORER 0x0001
# define SCSCR_INIT(port)	0x38
# define SCIF_ONLY
#elif defined(CONFIG_CPU_SH7763)
# define SCSPTR0 0xffe00024 /* 16 bit SCIF */
# define SCSPTR1 0xffe08024 /* 16 bit SCIF */
# define SCSPTR2 0xffe10020 /* 16 bit SCIF/IRDA */
# define SCIF_ORER 0x0001  /* overrun error bit */
# define SCSCR_INIT(port)	0x38	/* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
#elif defined(CONFIG_CPU_SH7780)
# define SCSPTR0	0xffe00024	/* 16 bit SCIF */
# define SCSPTR1	0xffe10024	/* 16 bit SCIF */
# define SCIF_ORER	0x0001		/* Overrun error bit */

/* TIE=0,RIE=0,TE=1,RE=1,REIE=1,CKE1=1 */
# define SCSCR_INIT(port)	0x3a

#elif defined(CONFIG_RZA1)
# define SCSPTR0 0xe8007020 /* 16 bit SCIF */
# define SCSPTR1 0xe8007820 /* 16 bit SCIF */
# define SCSPTR2 0xe8008020 /* 16 bit SCIF */
# define SCSPTR3 0xe8008820 /* 16 bit SCIF */
# define SCSPTR4 0xe8009020 /* 16 bit SCIF */
# define SCSPTR5 0xe8009820 /* 16 bit SCIF */
# define SCSPTR6 0xe800a020 /* 16 bit SCIF */
# define SCSPTR7 0xe800a820 /* 16 bit SCIF */
# define SCSCR_INIT(port)	0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
# define SCIF_ORER 0x0001  /* overrun error bit */
#elif defined(CONFIG_RCAR_GEN2) || defined(CONFIG_RCAR_GEN3) || \
      defined(CONFIG_R7S72100)
# if defined(CFG_SCIF_A)
#  define SCIF_ORER	0x0200
# else
#  define SCIF_ORER	0x0001
# endif
# define SCSCR_INIT(port)	(port->clk_mode == EXT_CLK ? 0x32 : 0x30)
				/* TIE=0,RIE=0,TE=1,RE=1,REIE=0, */
#else
# error CPU subtype not defined
#endif

/* SCSCR */
#define SCI_CTRL_FLAGS_TIE  0x80 /* all */
#define SCI_CTRL_FLAGS_RIE  0x40 /* all */
#define SCI_CTRL_FLAGS_TE   0x20 /* all */
#define SCI_CTRL_FLAGS_RE   0x10 /* all */
#if defined(CONFIG_CPU_SH7750)  || \
	defined(CONFIG_CPU_SH7750R) || \
	defined(CONFIG_CPU_SH7722)  || \
	defined(CONFIG_CPU_SH7734)  || \
	defined(CONFIG_CPU_SH7750S) || \
	defined(CONFIG_CPU_SH7751)  || \
	defined(CONFIG_CPU_SH7751R) || \
	defined(CONFIG_CPU_SH7763)  || \
	defined(CONFIG_CPU_SH7780)
#define SCI_CTRL_FLAGS_REIE 0x08 /* 7750 SCIF */
#else
#define SCI_CTRL_FLAGS_REIE 0
#endif
/*		SCI_CTRL_FLAGS_MPIE 0x08  * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
/*		SCI_CTRL_FLAGS_TEIE 0x04  * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
/*		SCI_CTRL_FLAGS_CKE1 0x02  * all */
/*		SCI_CTRL_FLAGS_CKE0 0x01  * 7707 SCI/SCIF, 7708 SCI, 7709 SCI/SCIF, 7750 SCI */

/* SCxSR SCI */
#define SCI_TDRE  0x80 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
#define SCI_RDRF  0x40 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
#define SCI_ORER  0x20 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
#define SCI_FER   0x10 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
#define SCI_PER   0x08 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
#define SCI_TEND  0x04 /* 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
/*      SCI_MPB   0x02  * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */
/*      SCI_MPBT  0x01  * 7707 SCI, 7708 SCI, 7709 SCI, 7750 SCI */

#define SCI_ERRORS ( SCI_PER | SCI_FER | SCI_ORER)

/* SCxSR SCIF */
#define SCIF_ER    0x0080 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_TEND  0x0040 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_TDFE  0x0020 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_BRK   0x0010 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_FER   0x0008 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_PER   0x0004 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_RDF   0x0002 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */
#define SCIF_DR    0x0001 /* 7705 SCIF, 7707 SCIF, 7709 SCIF, 7750 SCIF */

#if defined(CONFIG_CPU_SH7721) || \
	defined(CONFIG_R8A7740)
# define SCIF_ORER    0x0200
# define SCIF_ERRORS (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK | SCIF_ORER)
# define SCIF_RFDC_MASK 0x007f
# define SCIF_TXROOM_MAX 64
#elif defined(CONFIG_CPU_SH7763)
# define SCIF_ERRORS (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
# define SCIF_RFDC_MASK 0x007f
# define SCIF_TXROOM_MAX 64
/* SH7763 SCIF2 support */
# define SCIF2_RFDC_MASK 0x001f
# define SCIF2_TXROOM_MAX 16
#elif defined(CONFIG_RCAR_GEN2)
# define SCIF_ERRORS (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
# if defined(CFG_SCIF_A)
#  define SCIF_RFDC_MASK	0x007f
# else
#  define SCIF_RFDC_MASK	0x001f
# endif
#else
# define SCIF_ERRORS (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
# define SCIF_RFDC_MASK 0x001f
# define SCIF_TXROOM_MAX 16
#endif

#ifndef SCIF_ORER
#define SCIF_ORER	0x0000
#endif

#define SCxSR_TEND(port)\
		(((port)->type == PORT_SCI) ? SCI_TEND	: SCIF_TEND)
#define SCxSR_ERRORS(port)\
		(((port)->type == PORT_SCI) ? SCI_ERRORS : SCIF_ERRORS)
#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_ORER(port)\
		(((port)->type == PORT_SCI) ? SCI_ORER	: SCIF_ORER)

#if defined(CONFIG_CPU_SH7721) || \
	defined(CONFIG_R8A7740)
# define SCxSR_RDxF_CLEAR(port)	 (sci_in(port, SCxSR) & 0xfffc)
# define SCxSR_ERROR_CLEAR(port) (sci_in(port, SCxSR) & 0xfd73)
# define SCxSR_TDxE_CLEAR(port)	 (sci_in(port, SCxSR) & 0xffdf)
# define SCxSR_BREAK_CLEAR(port) (sci_in(port, SCxSR) & 0xffe3)
#else
# define SCxSR_RDxF_CLEAR(port)	 (((port)->type == PORT_SCI) ? 0xbc : 0x00fc)
# define SCxSR_ERROR_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x0073)
# define SCxSR_TDxE_CLEAR(port)  (((port)->type == PORT_SCI) ? 0x78 : 0x00df)
# define SCxSR_BREAK_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x00e3)
#endif

/* SCFCR */
#define SCFCR_RFRST 0x0002
#define SCFCR_TFRST 0x0004
#define SCFCR_TCRST 0x4000
#define SCFCR_MCE   0x0008

#define SCI_MAJOR		204
#define SCI_MINOR_START		8

/* Generic serial flags */
#define SCI_RX_THROTTLE		0x0000001

#define SCI_MAGIC 0xbabeface

/*
 * Events are used to schedule things to happen at timer-interrupt
 * time, instead of at rs interrupt time.
 */
#define SCI_EVENT_WRITE_WAKEUP	0

#define SCI_IN(size, offset)\
	if ((size) == 8) {\
		return readb(port->membase + (offset));\
	} else {\
		return readw(port->membase + (offset));\
	}
#define SCI_OUT(size, offset, value)\
	if ((size) == 8) {\
		writeb(value, port->membase + (offset));\
	} else if ((size) == 16) {\
		writew(value, port->membase + (offset));\
	}

#define CPU_SCIx_FNS(name, sci_offset, sci_size, scif_offset, scif_size)\
	static inline unsigned int sci_##name##_in(struct uart_port *port) {\
		if (port->type == PORT_SCIF || port->type == PORT_SCIFB) {\
			SCI_IN(scif_size, scif_offset)\
		} else { /* PORT_SCI or PORT_SCIFA */\
			SCI_IN(sci_size, sci_offset);\
		}\
	}\
static inline void sci_##name##_out(struct uart_port *port,\
				unsigned int value) {\
	if (port->type == PORT_SCIF || port->type == PORT_SCIFB) {\
		SCI_OUT(scif_size, scif_offset, value)\
	} else {	/* PORT_SCI or PORT_SCIFA */\
		SCI_OUT(sci_size, sci_offset, value);\
	}\
}

#define CPU_SCIF_FNS(name, scif_offset, scif_size)			\
	static inline unsigned int sci_##name##_in(struct uart_port *port) {\
		SCI_IN(scif_size, scif_offset);\
	}\
	static inline void sci_##name##_out(struct uart_port *port,\
					unsigned int value) {\
		SCI_OUT(scif_size, scif_offset, value);\
	}

#define CPU_SCI_FNS(name, sci_offset, sci_size)\
	static inline unsigned int sci_##name##_in(struct uart_port *port) {\
		SCI_IN(sci_size, sci_offset);\
	}\
	static inline void sci_##name##_out(struct uart_port *port,\
					unsigned int value) {\
		SCI_OUT(sci_size, sci_offset, value);\
	}

#if defined(CONFIG_R8A7740)
#if defined(CONFIG_CPU_SH7721) || \
	defined(CONFIG_SH73A0)
#define SCIF_FNS(name, scif_offset, scif_size) \
	CPU_SCIF_FNS(name, scif_offset, scif_size)
#elif defined(CONFIG_R8A7740)
#define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size,\
				sh4_scifb_offset, sh4_scifb_size) \
	CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size,\
				sh4_scifb_offset, sh4_scifb_size)
#define SCIF_FNS(name, scif_offset, scif_size) \
	CPU_SCIF_FNS(name, scif_offset, scif_size)
#else
#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size,\
				sh4_sci_offset, sh4_sci_size, \
				sh3_scif_offset, sh3_scif_size,\
				sh4_scif_offset, sh4_scif_size, \
				h8_sci_offset, h8_sci_size) \
	CPU_SCIx_FNS(name, sh3_sci_offset, sh3_sci_size,\
				sh3_scif_offset, sh3_scif_size)
#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size,\
				sh4_scif_offset, sh4_scif_size) \
	CPU_SCIF_FNS(name, sh3_scif_offset, sh3_scif_size)
#endif
#elif defined(CONFIG_CPU_SH7723)
		#define SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size,\
					sh4_scif_offset, sh4_scif_size) \
			CPU_SCIx_FNS(name, sh4_scifa_offset, sh4_scifa_size,\
					sh4_scif_offset, sh4_scif_size)
		#define SCIF_FNS(name, sh4_scif_offset, sh4_scif_size) \
			CPU_SCIF_FNS(name, sh4_scif_offset, sh4_scif_size)
#else
#define SCIx_FNS(name, sh3_sci_offset, sh3_sci_size,\
				sh4_sci_offset, sh4_sci_size, \
				sh3_scif_offset, sh3_scif_size,\
				sh4_scif_offset, sh4_scif_size, \
				h8_sci_offset, h8_sci_size) \
	CPU_SCIx_FNS(name, sh4_sci_offset, sh4_sci_size,\
					sh4_scif_offset, sh4_scif_size)
#define SCIF_FNS(name, sh3_scif_offset, sh3_scif_size, \
				sh4_scif_offset, sh4_scif_size) \
	CPU_SCIF_FNS(name, sh4_scif_offset, sh4_scif_size)
#endif

#if defined(CONFIG_CPU_SH7721)

SCIF_FNS(SCSMR,  0x00, 16)
SCIF_FNS(SCBRR,  0x04,  8)
SCIF_FNS(SCSCR,  0x08, 16)
SCIF_FNS(SCTDSR, 0x0c,  8)
SCIF_FNS(SCFER,  0x10, 16)
SCIF_FNS(SCxSR,  0x14, 16)
SCIF_FNS(SCFCR,  0x18, 16)
SCIF_FNS(SCFDR,  0x1c, 16)
SCIF_FNS(SCxTDR, 0x20,  8)
SCIF_FNS(SCxRDR, 0x24,  8)
SCIF_FNS(SCLSR,  0x00,  0)
SCIF_FNS(DL,	 0x00,  0) /* dummy */
#elif defined(CONFIG_R8A7740)
SCIF_FNS(SCSMR,  0x00, 16)
SCIF_FNS(SCBRR,  0x04,  8)
SCIF_FNS(SCSCR,  0x08, 16)
SCIF_FNS(SCTDSR, 0x0c, 16)
SCIF_FNS(SCFER,  0x10, 16)
SCIF_FNS(SCxSR,  0x14, 16)
SCIF_FNS(SCFCR,  0x18, 16)
SCIF_FNS(SCFDR,  0x1c, 16)
SCIF_FNS(SCTFDR, 0x38, 16)
SCIF_FNS(SCRFDR, 0x3c, 16)
SCIx_FNS(SCxTDR, 0x20,  8, 0x40,  8)
SCIx_FNS(SCxRDR, 0x24,  8, 0x60,  8)
SCIF_FNS(SCLSR,  0x00,  0)
SCIF_FNS(DL,	 0x00,  0) /* dummy */
#elif defined(CONFIG_CPU_SH7723)
SCIx_FNS(SCSMR,  0x00, 16, 0x00, 16)
SCIx_FNS(SCBRR,  0x04,  8, 0x04,  8)
SCIx_FNS(SCSCR,  0x08, 16, 0x08, 16)
SCIx_FNS(SCxTDR, 0x20,  8, 0x0c,  8)
SCIx_FNS(SCxSR,  0x14, 16, 0x10, 16)
SCIx_FNS(SCxRDR, 0x24,  8, 0x14,  8)
SCIx_FNS(SCSPTR, 0,     0,    0,  0)
SCIF_FNS(SCTDSR, 0x0c,  8)
SCIF_FNS(SCFER,  0x10, 16)
SCIF_FNS(SCFCR,  0x18, 16)
SCIF_FNS(SCFDR,  0x1c, 16)
SCIF_FNS(SCLSR,  0x24, 16)
SCIF_FNS(DL,	 0x00,  0) /* dummy */
#elif defined(CONFIG_RCAR_GEN2)
/* SCIFA and SCIF register offsets and size */
SCIx_FNS(SCSMR,  0,  0, 0x00, 16, 0,  0, 0x00, 16, 0,  0)
SCIx_FNS(SCBRR,  0,  0, 0x04,  8, 0,  0, 0x04,  8, 0,  0)
SCIx_FNS(SCSCR,  0,  0, 0x08, 16, 0,  0, 0x08, 16, 0,  0)
SCIx_FNS(SCxTDR, 0,  0, 0x20,  8, 0,  0, 0x0C,  8, 0,  0)
SCIx_FNS(SCxSR,  0,  0, 0x14, 16, 0,  0, 0x10, 16, 0,  0)
SCIx_FNS(SCxRDR, 0,  0, 0x24,  8, 0,  0, 0x14,  8, 0,  0)
SCIF_FNS(SCFCR,  0,  0, 0x18, 16)
SCIF_FNS(SCFDR,  0,  0, 0x1C, 16)
SCIF_FNS(SCSPTR, 0,  0, 0x20, 16)
SCIF_FNS(DL,     0,  0, 0x30, 16)
SCIF_FNS(CKS,    0,  0, 0x34, 16)
#if defined(CFG_SCIF_A)
SCIF_FNS(SCLSR,  0,  0, 0x14, 16)
#else
SCIF_FNS(SCLSR,  0,  0, 0x24, 16)
#endif
#else
/*      reg      SCI/SH3   SCI/SH4  SCIF/SH3   SCIF/SH4  SCI/H8*/
/*      name     off  sz   off  sz   off  sz   off  sz   off  sz*/
SCIx_FNS(SCSMR,  0x00,  8, 0x00,  8, 0x00,  8, 0x00, 16, 0x00,  8)
SCIx_FNS(SCBRR,  0x02,  8, 0x04,  8, 0x02,  8, 0x04,  8, 0x01,  8)
SCIx_FNS(SCSCR,  0x04,  8, 0x08,  8, 0x04,  8, 0x08, 16, 0x02,  8)
SCIx_FNS(SCxTDR, 0x06,  8, 0x0c,  8, 0x06,  8, 0x0C,  8, 0x03,  8)
SCIx_FNS(SCxSR,  0x08,  8, 0x10,  8, 0x08, 16, 0x10, 16, 0x04,  8)
SCIx_FNS(SCxRDR, 0x0a,  8, 0x14,  8, 0x0A,  8, 0x14,  8, 0x05,  8)
SCIF_FNS(SCFCR,                      0x0c,  8, 0x18, 16)
#if defined(CONFIG_CPU_SH7780)
SCIF_FNS(SCFDR,			     0x0e, 16, 0x1C, 16)
SCIF_FNS(SCTFDR,		     0x0e, 16, 0x1C, 16)
SCIF_FNS(SCRFDR,		     0x0e, 16, 0x20, 16)
SCIF_FNS(SCSPTR,			0,  0, 0x24, 16)
SCIF_FNS(SCLSR,				0,  0, 0x28, 16)
#elif defined(CONFIG_CPU_SH7763)
SCIF_FNS(SCFDR,				0,  0, 0x1C, 16)
SCIF_FNS(SCSPTR2,			0,  0, 0x20, 16)
SCIF_FNS(SCLSR2,			0,  0, 0x24, 16)
SCIF_FNS(SCTFDR,		     0x0e, 16, 0x1C, 16)
SCIF_FNS(SCRFDR,		     0x0e, 16, 0x20, 16)
SCIF_FNS(SCSPTR,			0,  0, 0x24, 16)
SCIF_FNS(SCLSR,				0,  0, 0x28, 16)
#else

SCIF_FNS(SCFDR,			     0x0e, 16, 0x1C, 16)
#if defined(CONFIG_CPU_SH7722)
SCIF_FNS(SCSPTR,			0,  0, 0, 0)
#else
SCIF_FNS(SCSPTR,			0,  0, 0x20, 16)
#endif
SCIF_FNS(SCLSR,				0,  0, 0x24, 16)
#endif
SCIF_FNS(DL,				0,  0, 0x0,  0) /* dummy */
#endif
#define sci_in(port, reg) sci_##reg##_in(port)
#define sci_out(port, reg, value) sci_##reg##_out(port, value)

#if defined(CONFIG_CPU_SH7750)  || \
	defined(CONFIG_CPU_SH7751)  || \
	defined(CONFIG_CPU_SH7751R) || \
	defined(CONFIG_CPU_SH7750R) || \
	defined(CONFIG_CPU_SH7750S)
static inline int sci_rxd_in(struct uart_port *port)
{
	if (port->mapbase == 0xffe00000)
		return __raw_readb(SCSPTR1)&0x01 ? 1 : 0; /* SCI */
	return 1;
}
#else /* default case for non-SCI processors */
static inline int sci_rxd_in(struct uart_port *port)
{
	return 1;
}
#endif

/*
 * Values for the BitRate Register (SCBRR)
 *
 * The values are actually divisors for a frequency which can
 * be internal to the SH3 (14.7456MHz) or derived from an external
 * clock source.  This driver assumes the internal clock is used;
 * to support using an external clock source, config options or
 * possibly command-line options would need to be added.
 *
 * Also, to support speeds below 2400 (why?) the lower 2 bits of
 * the SCSMR register would also need to be set to non-zero values.
 *
 * -- Greg Banks 27Feb2000
 *
 * Answer: The SCBRR register is only eight bits, and the value in
 * it gets larger with lower baud rates. At around 2400 (depending on
 * the peripherial module clock) you run out of bits. However the
 * lower two bits of SCSMR allow the module clock to be divided down,
 * scaling the value which is needed in SCBRR.
 *
 * -- Stuart Menefy - 23 May 2000
 *
 * I meant, why would anyone bother with bitrates below 2400.
 *
 * -- Greg Banks - 7Jul2000
 *
 * You "speedist"!  How will I use my 110bps ASR-33 teletype with paper
 * tape reader as a console!
 *
 * -- Mitch Davis - 15 Jul 2000
 */

#if defined(CONFIG_CPU_SH7780)
#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(16*bps)-1)
#elif defined(CONFIG_CPU_SH7721) || \
	defined(CONFIG_R8A7740)
#define SCBRR_VALUE(bps, clk) (((clk*2)+16*bps)/(32*bps)-1)
#elif defined(CONFIG_CPU_SH7723)
static inline int scbrr_calc(struct uart_port *port, int bps, int clk)
{
	if (port->type == PORT_SCIF)
		return (clk+16*bps)/(32*bps)-1;
	else
		return ((clk*2)+16*bps)/(16*bps)-1;
}
#define SCBRR_VALUE(bps, clk) scbrr_calc(port, bps, clk)
#elif defined(CONFIG_RCAR_GEN2)
#define DL_VALUE(bps, clk) (clk / bps / 16) /* External Clock */
 #if defined(CFG_SCIF_A)
  #define SCBRR_VALUE(bps, clk) (clk / bps / 16 - 1) /* Internal Clock */
 #else
  #define SCBRR_VALUE(bps, clk) (clk / bps / 32 - 1) /* Internal Clock */
 #endif
#else /* Generic SH */
#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1)
#endif

#ifndef DL_VALUE
#define DL_VALUE(bps, clk) 0
#endif