drivers/tty/serial/sh-sci.h

   1 #include <linux/serial_core.h>
   2 #include <linux/io.h>
   3 #include <linux/gpio.h>
   4
   5 #define SCI_MAJOR               204
   6 #define SCI_MINOR_START         8
   7
   8
   9 /*
  10  * SCI register subset common for all port types.
  11  * Not all registers will exist on all parts.
  12  */
  13 enum {
  14         SCSMR,                          /* Serial Mode Register */
  15         SCBRR,                          /* Bit Rate Register */
  16         SCSCR,                          /* Serial Control Register */
  17         SCxSR,                          /* Serial Status Register */
  18         SCFCR,                          /* FIFO Control Register */
  19         SCFDR,                          /* FIFO Data Count Register */
  20         SCxTDR,                         /* Transmit (FIFO) Data Register */
  21         SCxRDR,                         /* Receive (FIFO) Data Register */
  22         SCLSR,                          /* Line Status Register */
  23         SCTFDR,                         /* Transmit FIFO Data Count Register */
  24         SCRFDR,                         /* Receive FIFO Data Count Register */
  25         SCSPTR,                         /* Serial Port Register */
  26         HSSRR,                          /* Sampling Rate Register */
  27         SCPCR,                          /* Serial Port Control Register */
  28         SCPDR,                          /* Serial Port Data Register */
  29
  30         SCIx_NR_REGS,
  31 };
  32
  33
  34 /* SCSMR (Serial Mode Register) */
  35 #define SCSMR_CHR       (1 << 6)        /* 7-bit Character Length */
  36 #define SCSMR_PE        (1 << 5)        /* Parity Enable */
  37 #define SCSMR_ODD       (1 << 4)        /* Odd Parity */
  38 #define SCSMR_STOP      (1 << 3)        /* Stop Bit Length */
  39 #define SCSMR_CKS       0x0003          /* Clock Select */
  40
  41 /* Serial Control Register, SCIFA/SCIFB only bits */
  42 #define SCSCR_TDRQE     (1 << 15)       /* Tx Data Transfer Request Enable */
  43 #define SCSCR_RDRQE     (1 << 14)       /* Rx Data Transfer Request Enable */
  44
  45 /* SCxSR (Serial Status Register) on SCI */
  46 #define SCI_TDRE  0x80                  /* Transmit Data Register Empty */
  47 #define SCI_RDRF  0x40                  /* Receive Data Register Full */
  48 #define SCI_ORER  0x20                  /* Overrun Error */
  49 #define SCI_FER   0x10                  /* Framing Error */
  50 #define SCI_PER   0x08                  /* Parity Error */
  51 #define SCI_TEND  0x04                  /* Transmit End */
  52
  53 #define SCI_DEFAULT_ERROR_MASK (SCI_PER | SCI_FER)
  54
  55 /* SCxSR (Serial Status Register) on SCIF, HSCIF */
  56 #define SCIF_ER    0x0080               /* Receive Error */
  57 #define SCIF_TEND  0x0040               /* Transmission End */
  58 #define SCIF_TDFE  0x0020               /* Transmit FIFO Data Empty */
  59 #define SCIF_BRK   0x0010               /* Break Detect */
  60 #define SCIF_FER   0x0008               /* Framing Error */
  61 #define SCIF_PER   0x0004               /* Parity Error */
  62 #define SCIF_RDF   0x0002               /* Receive FIFO Data Full */
  63 #define SCIF_DR    0x0001               /* Receive Data Ready */
  64
  65 #define SCIF_DEFAULT_ERROR_MASK (SCIF_PER | SCIF_FER | SCIF_ER | SCIF_BRK)
  66
  67 /* SCFCR (FIFO Control Register) */
  68 #define SCFCR_MCE       0x0008
  69 #define SCFCR_TFRST     0x0004
  70 #define SCFCR_RFRST     0x0002
  71 #define SCFCR_LOOP      (1 << 0)        /* Loopback Test */
  72
  73 /* SCSPTR (Serial Port Register), optional */
  74 #define SCSPTR_RTSIO    (1 << 7)        /* Serial Port RTS Pin Input/Output */
  75 #define SCSPTR_RTSDT    (1 << 6)        /* Serial Port RTS Pin Data */
  76 #define SCSPTR_CTSIO    (1 << 5)        /* Serial Port CTS Pin Input/Output */
  77 #define SCSPTR_CTSDT    (1 << 4)        /* Serial Port CTS Pin Data */
  78 #define SCSPTR_SPB2IO   (1 << 1)        /* Serial Port Break Input/Output */
  79 #define SCSPTR_SPB2DT   (1 << 0)        /* Serial Port Break Data */
  80
  81 /* HSSRR HSCIF */
  82 #define HSCIF_SRE       0x8000          /* Sampling Rate Register Enable */
  83
  84 /* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */
  85 #define SCPCR_RTSC      (1 << 4)        /* Serial Port RTS Pin / Output Pin */
  86 #define SCPCR_CTSC      (1 << 3)        /* Serial Port CTS Pin / Input Pin */
  87
  88 /* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */
  89 #define SCPDR_RTSD      (1 << 4)        /* Serial Port RTS Output Pin Data */
  90 #define SCPDR_CTSD      (1 << 3)        /* Serial Port CTS Input Pin Data */
  91
  92
  93 #define SCxSR_TEND(port)        (((port)->type == PORT_SCI) ? SCI_TEND   : SCIF_TEND)
  94 #define SCxSR_RDxF(port)        (((port)->type == PORT_SCI) ? SCI_RDRF   : SCIF_RDF)
  95 #define SCxSR_TDxE(port)        (((port)->type == PORT_SCI) ? SCI_TDRE   : SCIF_TDFE)
  96 #define SCxSR_FER(port)         (((port)->type == PORT_SCI) ? SCI_FER    : SCIF_FER)
  97 #define SCxSR_PER(port)         (((port)->type == PORT_SCI) ? SCI_PER    : SCIF_PER)
  98 #define SCxSR_BRK(port)         (((port)->type == PORT_SCI) ? 0x00       : SCIF_BRK)
  99
 100 #define SCxSR_ERRORS(port)      (to_sci_port(port)->error_mask)
 101
 102 #if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
 103     defined(CONFIG_CPU_SUBTYPE_SH7720) || \
 104     defined(CONFIG_CPU_SUBTYPE_SH7721) || \
 105     defined(CONFIG_ARCH_SH73A0) || \
 106     defined(CONFIG_ARCH_R8A7740)
 107
 108 # define SCxSR_RDxF_CLEAR(port)  (serial_port_in(port, SCxSR) & 0xfffc)
 109 # define SCxSR_ERROR_CLEAR(port) (serial_port_in(port, SCxSR) & 0xfd73)
 110 # define SCxSR_TDxE_CLEAR(port)  (serial_port_in(port, SCxSR) & 0xffdf)
 111 # define SCxSR_BREAK_CLEAR(port) (serial_port_in(port, SCxSR) & 0xffe3)
 112 #else
 113 # define SCxSR_RDxF_CLEAR(port)  (((port)->type == PORT_SCI) ? 0xbc : 0x00fc)
 114 # define SCxSR_ERROR_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x0073)
 115 # define SCxSR_TDxE_CLEAR(port)  (((port)->type == PORT_SCI) ? 0x78 : 0x00df)
 116 # define SCxSR_BREAK_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x00e3)
 117 #endif
 118