drivers/tty/serial/m32r_sio_reg.h

   1 // SPDX-License-Identifier: GPL-1.0+
   2 /*
   3  * m32r_sio_reg.h
   4  *
   5  * Copyright (C) 1992, 1994 by Theodore Ts'o.
   6  * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
   7  *
   8  * These are the UART port assignments, expressed as offsets from the base
   9  * register.  These assignments should hold for any serial port based on
  10  * a 8250, 16450, or 16550(A).
  11  */
  12
  13 #ifndef _M32R_SIO_REG_H
  14 #define _M32R_SIO_REG_H
  15
  16
  17 #ifdef CONFIG_SERIAL_M32R_PLDSIO
  18
  19 #define SIOCR           0x000
  20 #define SIOMOD0         0x002
  21 #define SIOMOD1         0x004
  22 #define SIOSTS          0x006
  23 #define SIOTRCR         0x008
  24 #define SIOBAUR         0x00a
  25 // #define SIORBAUR     0x018
  26 #define SIOTXB          0x00c
  27 #define SIORXB          0x00e
  28
  29 #define UART_RX         ((unsigned long) PLD_ESIO0RXB)
  30                                 /* In:  Receive buffer (DLAB=0) */
  31 #define UART_TX         ((unsigned long) PLD_ESIO0TXB)
  32                                 /* Out: Transmit buffer (DLAB=0) */
  33 #define UART_DLL        0       /* Out: Divisor Latch Low (DLAB=1) */
  34 #define UART_TRG        0       /* (LCR=BF) FCTR bit 7 selects Rx or Tx
  35                                  * In: Fifo count
  36                                  * Out: Fifo custom trigger levels
  37                                  * XR16C85x only */
  38
  39 #define UART_DLM        0       /* Out: Divisor Latch High (DLAB=1) */
  40 #define UART_IER        ((unsigned long) PLD_ESIO0INTCR)
  41                                 /* Out: Interrupt Enable Register */
  42 #define UART_FCTR       0       /* (LCR=BF) Feature Control Register
  43                                  * XR16C85x only */
  44
  45 #define UART_IIR        0       /* In:  Interrupt ID Register */
  46 #define UART_FCR        0       /* Out: FIFO Control Register */
  47 #define UART_EFR        0       /* I/O: Extended Features Register */
  48                                 /* (DLAB=1, 16C660 only) */
  49
  50 #define UART_LCR        0       /* Out: Line Control Register */
  51 #define UART_MCR        0       /* Out: Modem Control Register */
  52 #define UART_LSR        ((unsigned long) PLD_ESIO0STS)
  53                                 /* In:  Line Status Register */
  54 #define UART_MSR        0       /* In:  Modem Status Register */
  55 #define UART_SCR        0       /* I/O: Scratch Register */
  56 #define UART_EMSR       0       /* (LCR=BF) Extended Mode Select Register
  57                                  * FCTR bit 6 selects SCR or EMSR
  58                                  * XR16c85x only */
  59
  60 #else /* not CONFIG_SERIAL_M32R_PLDSIO */
  61
  62 #define SIOCR           0x000
  63 #define SIOMOD0         0x004
  64 #define SIOMOD1         0x008
  65 #define SIOSTS          0x00c
  66 #define SIOTRCR         0x010
  67 #define SIOBAUR         0x014
  68 #define SIORBAUR        0x018
  69 #define SIOTXB          0x01c
  70 #define SIORXB          0x020
  71
  72 #define UART_RX         M32R_SIO0_RXB_PORTL     /* In:  Receive buffer (DLAB=0) */
  73 #define UART_TX         M32R_SIO0_TXB_PORTL     /* Out: Transmit buffer (DLAB=0) */
  74 #define UART_DLL        0       /* Out: Divisor Latch Low (DLAB=1) */
  75 #define UART_TRG        0       /* (LCR=BF) FCTR bit 7 selects Rx or Tx
  76                                  * In: Fifo count
  77                                  * Out: Fifo custom trigger levels
  78                                  * XR16C85x only */
  79
  80 #define UART_DLM        0       /* Out: Divisor Latch High (DLAB=1) */
  81 #define UART_IER        M32R_SIO0_TRCR_PORTL    /* Out: Interrupt Enable Register */
  82 #define UART_FCTR       0       /* (LCR=BF) Feature Control Register
  83                                  * XR16C85x only */
  84
  85 #define UART_IIR        0       /* In:  Interrupt ID Register */
  86 #define UART_FCR        0       /* Out: FIFO Control Register */
  87 #define UART_EFR        0       /* I/O: Extended Features Register */
  88                                 /* (DLAB=1, 16C660 only) */
  89
  90 #define UART_LCR        0       /* Out: Line Control Register */
  91 #define UART_MCR        0       /* Out: Modem Control Register */
  92 #define UART_LSR        M32R_SIO0_STS_PORTL     /* In:  Line Status Register */
  93 #define UART_MSR        0       /* In:  Modem Status Register */
  94 #define UART_SCR        0       /* I/O: Scratch Register */
  95 #define UART_EMSR       0       /* (LCR=BF) Extended Mode Select Register
  96                                  * FCTR bit 6 selects SCR or EMSR
  97                                  * XR16c85x only */
  98
  99 #endif /* CONFIG_SERIAL_M32R_PLDSIO */
 100
 101 #define UART_EMPTY      (UART_LSR_TEMT | UART_LSR_THRE)
 102
 103 /*
 104  * These are the definitions for the Line Control Register
 105  *
 106  * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
 107  * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
 108  */
 109 #define UART_LCR_DLAB   0x80    /* Divisor latch access bit */
 110 #define UART_LCR_SBC    0x40    /* Set break control */
 111 #define UART_LCR_SPAR   0x20    /* Stick parity (?) */
 112 #define UART_LCR_EPAR   0x10    /* Even parity select */
 113 #define UART_LCR_PARITY 0x08    /* Parity Enable */
 114 #define UART_LCR_STOP   0x04    /* Stop bits: 0=1 stop bit, 1= 2 stop bits */
 115 #define UART_LCR_WLEN5  0x00    /* Wordlength: 5 bits */
 116 #define UART_LCR_WLEN6  0x01    /* Wordlength: 6 bits */
 117 #define UART_LCR_WLEN7  0x02    /* Wordlength: 7 bits */
 118 #define UART_LCR_WLEN8  0x03    /* Wordlength: 8 bits */
 119
 120 /*
 121  * These are the definitions for the Line Status Register
 122  */
 123 #define UART_LSR_TEMT   0x02    /* Transmitter empty */
 124 #define UART_LSR_THRE   0x01    /* Transmit-hold-register empty */
 125 #define UART_LSR_BI     0x00    /* Break interrupt indicator */
 126 #define UART_LSR_FE     0x80    /* Frame error indicator */
 127 #define UART_LSR_PE     0x40    /* Parity error indicator */
 128 #define UART_LSR_OE     0x20    /* Overrun error indicator */
 129 #define UART_LSR_DR     0x04    /* Receiver data ready */
 130
 131 /*
 132  * These are the definitions for the Interrupt Identification Register
 133  */
 134 #define UART_IIR_NO_INT 0x01    /* No interrupts pending */
 135 #define UART_IIR_ID     0x06    /* Mask for the interrupt ID */
 136
 137 #define UART_IIR_MSI    0x00    /* Modem status interrupt */
 138 #define UART_IIR_THRI   0x02    /* Transmitter holding register empty */
 139 #define UART_IIR_RDI    0x04    /* Receiver data interrupt */
 140 #define UART_IIR_RLSI   0x06    /* Receiver line status interrupt */
 141
 142 /*
 143  * These are the definitions for the Interrupt Enable Register
 144  */
 145 #define UART_IER_MSI    0x00    /* Enable Modem status interrupt */
 146 #define UART_IER_RLSI   0x08    /* Enable receiver line status interrupt */
 147 #define UART_IER_THRI   0x03    /* Enable Transmitter holding register int. */
 148 #define UART_IER_RDI    0x04    /* Enable receiver data interrupt */
 149
 150 #endif /* _M32R_SIO_REG_H */