sh-sci.h
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- /* $Id: sh-sci.h,v 1.8 2000/03/08 15:19:39 gniibe Exp $
- *
- * linux/drivers/char/sh-sci.h
- *
- * SuperH on-chip serial module support. (SCI with no FIFO / with FIFO)
- * Copyright (C) 1999, 2000 Niibe Yutaka
- * Copyright (C) 2000 Greg Banks
- * Modified to support multiple serial ports. Stuart Menefy (May 2000).
- *
- */
- #include <linux/config.h>
- /* Values for sci_port->type */
- #define PORT_SCI 0
- #define PORT_SCIF 1
- #define PORT_IRDA 1 /* XXX: temporary assignment */
- /* Offsets into the sci_port->irqs array */
- #define SCIx_ERI_IRQ 0
- #define SCIx_RXI_IRQ 1
- #define SCIx_TXI_IRQ 2
- /* ERI, RXI, TXI, BRI */
- #define SCI_IRQS { 23, 24, 25, 0 }
- #define SH3_SCIF_IRQS { 56, 57, 59, 58 }
- #define SH3_IRDA_IRQS { 52, 53, 55, 54 }
- #define SH4_SCIF_IRQS { 40, 41, 43, 42 }
- #define STB1_SCIF1_IRQS {23, 24, 26, 25 }
- #if defined(CONFIG_CPU_SUBTYPE_SH7708)
- # define SCI_NPORTS 1
- # define SCI_INIT {
- { {}, PORT_SCI, 0xfffffe80, SCI_IRQS, sci_init_pins_sci }
- }
- # define SCSPTR 0xffffff7c /* 8 bit */
- # define SCSCR_INIT(port) 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */
- # define SCI_ONLY
- #elif defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- # define SCI_NPORTS 3
- # define SCI_INIT {
- { {}, PORT_SCI, 0xfffffe80, SCI_IRQS, sci_init_pins_sci },
- { {}, PORT_SCIF, 0xA4000150, SH3_SCIF_IRQS, sci_init_pins_scif },
- { {}, PORT_SCIF, 0xA4000140, SH3_IRDA_IRQS, sci_init_pins_irda }
- }
- # define SCPCR 0xA4000116 /* 16 bit SCI and SCIF */
- # define SCPDR 0xA4000136 /* 8 bit SCI and SCIF */
- # define SCSCR_INIT(port) 0x30 /* TIE=0,RIE=0,TE=1,RE=1 */
- # define SCI_AND_SCIF
- #elif defined(CONFIG_CPU_SUBTYPE_SH7750) || defined(CONFIG_CPU_SUBTYPE_SH7751)
- # define SCI_NPORTS 2
- # define SCI_INIT {
- { {}, PORT_SCI, 0xffe00000, SCI_IRQS, sci_init_pins_sci },
- { {}, PORT_SCIF, 0xFFE80000, SH4_SCIF_IRQS, sci_init_pins_scif }
- }
- # 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 */ )
- # define SCI_AND_SCIF
- #elif defined(CONFIG_CPU_SUBTYPE_ST40STB1)
- # define SCI_NPORTS 2
- # define SCI_INIT {
- { {}, PORT_SCIF, 0xffe00000, STB1_SCIF1_IRQS, sci_init_pins_scif },
- { {}, PORT_SCIF, 0xffe80000, SH4_SCIF_IRQS, sci_init_pins_scif }
- }
- # define SCSPTR1 0xffe00020 /* 16 bit SCIF */
- # define SCSPTR2 0xffe80020 /* 16 bit SCIF */
- # define SCIF_ORER 0x0001 /* overrun error bit */
- # define SCSCR_INIT(port) 0x38 /* TIE=0,RIE=0,TE=1,RE=1,REIE=1 */
- # define SCIF_ONLY
- #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 */
- /* SCI_CTRL_FLAGS_REIE 0x08 * 7750 SCIF */
- /* 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 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_TEND 0x0040 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_TDFE 0x0020 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_BRK 0x0010 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_FER 0x0008 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_PER 0x0004 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_RDF 0x0002 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_DR 0x0001 /* 7707 SCIF, 7709 SCIF, 7750 SCIF */
- #define SCIF_ERRORS ( SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
- #if defined(SCI_ONLY)
- # define SCxSR_TEND(port) SCI_TEND
- # define SCxSR_ERRORS(port) SCI_ERRORS
- # define SCxSR_RDxF(port) SCI_RDRF
- # define SCxSR_TDxE(port) SCI_TDRE
- # define SCxSR_ORER(port) SCI_ORER
- # define SCxSR_FER(port) SCI_FER
- # define SCxSR_PER(port) SCI_PER
- # define SCxSR_BRK(port) 0x00
- # define SCxSR_RDxF_CLEAR(port) 0xbc
- # define SCxSR_ERROR_CLEAR(port) 0xc4
- # define SCxSR_TDxE_CLEAR(port) 0x78
- # define SCxSR_BREAK_CLEAR(port) 0xc4
- #elif defined(SCIF_ONLY)
- # define SCxSR_TEND(port) SCIF_TEND
- # define SCxSR_ERRORS(port) SCIF_ERRORS
- # define SCxSR_RDxF(port) SCIF_RDF
- # define SCxSR_TDxE(port) SCIF_TDFE
- # define SCxSR_ORER(port) 0x0000
- # define SCxSR_FER(port) SCIF_FER
- # define SCxSR_PER(port) SCIF_PER
- # define SCxSR_BRK(port) SCIF_BRK
- # define SCxSR_RDxF_CLEAR(port) 0x00fc
- # define SCxSR_ERROR_CLEAR(port) 0x0073
- # define SCxSR_TDxE_CLEAR(port) 0x00df
- # define SCxSR_BREAK_CLEAR(port) 0x00e3
- #else
- # 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_ORER(port) (((port)->type == PORT_SCI) ? SCI_ORER : 0x0000)
- # 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_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_MCE 0x0008
- #define SCI_MAJOR 204
- #define SCI_MINOR_START 8
- /* Generic serial flags */
- #define SCI_RX_THROTTLE 0x0000001
- /* generic serial tty */
- #define O_OTHER(tty)
- ((O_OLCUC(tty)) ||
- (O_ONLCR(tty)) ||
- (O_OCRNL(tty)) ||
- (O_ONOCR(tty)) ||
- (O_ONLRET(tty)) ||
- (O_OFILL(tty)) ||
- (O_OFDEL(tty)) ||
- (O_NLDLY(tty)) ||
- (O_CRDLY(tty)) ||
- (O_TABDLY(tty)) ||
- (O_BSDLY(tty)) ||
- (O_VTDLY(tty)) ||
- (O_FFDLY(tty)))
- #define I_OTHER(tty)
- ((I_INLCR(tty)) ||
- (I_IGNCR(tty)) ||
- (I_ICRNL(tty)) ||
- (I_IUCLC(tty)) ||
- (L_ISIG(tty)))
- #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
- struct sci_port {
- struct gs_port gs;
- int type;
- unsigned int base;
- unsigned char irqs[4]; /* ERI, RXI, TXI, BRI */
- void (*init_pins)(struct sci_port* port, unsigned int cflag);
- unsigned int old_cflag;
- struct async_icount icount;
- struct tq_struct tqueue;
- unsigned long event;
- };
- #define SCI_IN(size, offset)
- unsigned int addr = port->base + (offset);
- if ((size) == 8) {
- return ctrl_inb(addr);
- } else {
- return ctrl_inw(addr);
- }
- #define SCI_OUT(size, offset, value)
- unsigned int addr = port->base + (offset);
- if ((size) == 8) {
- ctrl_outb(value, addr);
- } else {
- ctrl_outw(value, addr);
- }
- #define CPU_SCIx_FNS(name, sci_offset, sci_size, scif_offset, scif_size)
- static inline unsigned int sci_##name##_in(struct sci_port* port)
- {
- if (port->type == PORT_SCI) {
- SCI_IN(sci_size, sci_offset)
- } else {
- SCI_IN(scif_size, scif_offset);
- }
- }
- static inline void sci_##name##_out(struct sci_port* port, unsigned int value)
- {
- if (port->type == PORT_SCI) {
- SCI_OUT(sci_size, sci_offset, value)
- } else {
- SCI_OUT(scif_size, scif_offset, value);
- }
- }
- #define CPU_SCIF_FNS(name, scif_offset, scif_size)
- static inline unsigned int sci_##name##_in(struct sci_port* port)
- {
- SCI_IN(scif_size, scif_offset);
- }
- static inline void sci_##name##_out(struct sci_port* port, unsigned int value)
- {
- SCI_OUT(scif_size, scif_offset, value);
- }
- #ifdef __sh3__
- #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)
- 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)
- #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)
- 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
- /* reg SCI/SH3 SCI/SH4 SCIF/SH3 SCIF/SH4 */
- /* name off sz off sz off sz off sz */
- SCIx_FNS(SCSMR, 0x00, 8, 0x00, 8, 0x00, 8, 0x00, 16)
- SCIx_FNS(SCBRR, 0x02, 8, 0x04, 8, 0x02, 8, 0x04, 8)
- SCIx_FNS(SCSCR, 0x04, 8, 0x08, 8, 0x04, 8, 0x08, 16)
- SCIx_FNS(SCxTDR, 0x06, 8, 0x0c, 8, 0x06, 8, 0x0C, 8)
- SCIx_FNS(SCxSR, 0x08, 8, 0x10, 8, 0x08, 16, 0x10, 16)
- SCIx_FNS(SCxRDR, 0x0a, 8, 0x14, 8, 0x0A, 8, 0x14, 8)
- SCIF_FNS(SCFCR, 0x0c, 8, 0x18, 16)
- SCIF_FNS(SCFDR, 0x0e, 16, 0x1C, 16)
- SCIF_FNS(SCLSR, 0, 0, 0x24, 16)
- #define sci_in(port, reg) sci_##reg##_in(port)
- #define sci_out(port, reg, value) sci_##reg##_out(port, value)
- #if defined(CONFIG_CPU_SUBTYPE_SH7708)
- static inline int sci_rxd_in(struct sci_port *port)
- {
- if (port->base == 0xfffffe80)
- return ctrl_inb(SCSPTR)&0x01 ? 1 : 0; /* SCI */
- return 1;
- }
- #elif defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709)
- static inline int sci_rxd_in(struct sci_port *port)
- {
- if (port->base == 0xfffffe80)
- return ctrl_inb(SCPDR)&0x01 ? 1 : 0; /* SCI */
- if (port->base == 0xa4000150)
- return ctrl_inb(SCPDR)&0x10 ? 1 : 0; /* SCIF */
- if (port->base == 0xa4000140)
- return ctrl_inb(SCPDR)&0x04 ? 1 : 0; /* IRDA */
- return 1;
- }
- #elif defined(CONFIG_CPU_SUBTYPE_SH7750) || defined(CONFIG_CPU_SUBTYPE_SH7751)
- static inline int sci_rxd_in(struct sci_port *port)
- {
- #ifndef SCIF_ONLY
- if (port->base == 0xffe00000)
- return ctrl_inb(SCSPTR1)&0x01 ? 1 : 0; /* SCI */
- #endif
- #ifndef SCI_ONLY
- if (port->base == 0xffe80000)
- return ctrl_inw(SCSPTR2)&0x0001 ? 1 : 0; /* SCIF */
- #endif
- return 1;
- }
- #elif defined(CONFIG_CPU_SUBTYPE_ST40STB1)
- static inline int sci_rxd_in(struct sci_port *port)
- {
- if (port->base == 0xffe00000)
- return ctrl_inw(SCSPTR1)&0x0001 ? 1 : 0; /* SCIF */
- else
- return ctrl_inw(SCSPTR2)&0x0001 ? 1 : 0; /* SCIF */
- }
- #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
- */
- #define PCLK (current_cpu_data.module_clock)
- #define SCBRR_VALUE(bps) ((PCLK+16*bps)/(32*bps)-1)
- #define BPS_2400 SCBRR_VALUE(2400)
- #define BPS_4800 SCBRR_VALUE(4800)
- #define BPS_9600 SCBRR_VALUE(9600)
- #define BPS_19200 SCBRR_VALUE(19200)
- #define BPS_38400 SCBRR_VALUE(38400)
- #define BPS_57600 SCBRR_VALUE(57600)
- #define BPS_115200 SCBRR_VALUE(115200)