LXR uboot/board/bmw/ns16550.h

   1/*
   2 * NS16550 Serial Port
   3 * originally from linux source (arch/ppc/boot/ns16550.h)
   4 * modified slightly to
   5 * have addresses as offsets from CONFIG_SYS_ISA_BASE
   6 * added a few more definitions
   7 * added prototypes for ns16550.c
   8 * reduced no of com ports to 2
   9 * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
  10 * further modified to support the 8245 duart
  11 * modifications (c) Paul Jimenez, Musenki, Inc. 2001.
  12 */
  13
  14
  15struct NS16550 {
  16        unsigned char rbrthrdlb;        /* 0 */
  17        unsigned char ierdmb;           /* 1 */
  18        unsigned char iirfcrafr;        /* 2 */
  19        unsigned char lcr;              /* 3 */
  20        unsigned char mcr;              /* 4 */
  21        unsigned char lsr;              /* 5 */
  22        unsigned char msr;              /* 6 */
  23        unsigned char scr;              /* 7 */
  24        unsigned char reserved[2];      /* 8 & 9 */
  25        unsigned char dsr;              /* 10 */
  26        unsigned char dcr;              /* 11 */
  27};
  28
  29
  30#define rbr rbrthrdlb
  31#define thr rbrthrdlb
  32#define dll rbrthrdlb
  33#define ier ierdmb
  34#define dlm ierdmb
  35#define iir iirfcrafr
  36#define fcr iirfcrafr
  37#define afr iirfcrafr
  38
  39#define FCR_FIFO_EN     0x01    /*fifo enable */
  40#define FCR_RXSR        0x02    /*reciever soft reset */
  41#define FCR_TXSR        0x04    /*transmitter soft reset */
  42#define FCR_DMS         0x08    /* DMA Mode Select */
  43
  44#define MCR_RTS         0x02    /* Readyu to Send */
  45#define MCR_LOOP        0x10    /* Local loopback mode enable */
  46/* #define MCR_DTR         0x01    noton 8245 duart */
  47/* #define MCR_DMA_EN      0x04    noton 8245 duart */
  48/* #define MCR_TX_DFR      0x08    noton 8245 duart */
  49
  50#define LCR_WLS_MSK 0x03        /* character length slect mask */
  51#define LCR_WLS_5   0x00        /* 5 bit character length */
  52#define LCR_WLS_6   0x01        /* 6 bit character length */
  53#define LCR_WLS_7   0x02        /* 7 bit character length */
  54#define LCR_WLS_8   0x03        /* 8 bit character length */
  55#define LCR_STB     0x04        /* Number of stop Bits, off = 1, on = 1.5 or 2) */
  56#define LCR_PEN     0x08        /* Parity eneble */
  57#define LCR_EPS     0x10        /* Even Parity Select */
  58#define LCR_STKP    0x20        /* Stick Parity */
  59#define LCR_SBRK    0x40        /* Set Break */
  60#define LCR_BKSE    0x80        /* Bank select enable - aka DLAB on 8245 */
  61
  62#define LSR_DR      0x01        /* Data ready */
  63#define LSR_OE      0x02        /* Overrun */
  64#define LSR_PE      0x04        /* Parity error */
  65#define LSR_FE      0x08        /* Framing error */
  66#define LSR_BI      0x10        /* Break */
  67#define LSR_THRE    0x20        /* Xmit holding register empty */
  68#define LSR_TEMT    0x40        /* Xmitter empty */
  69#define LSR_ERR     0x80        /* Error */
  70
  71/* useful defaults for LCR*/
  72#define LCR_8N1     0x03
  73
  74
  75volatile struct NS16550 *NS16550_init (int chan, int baud_divisor);
  76void NS16550_putc (volatile struct NS16550 *com_port, unsigned char c);
  77unsigned char NS16550_getc (volatile struct NS16550 *com_port);
  78int NS16550_tstc (volatile struct NS16550 *com_port);
  79void NS16550_reinit (volatile struct NS16550 *com_port, int baud_divisor);
  80