include/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  *
  11  * added support for port on 64-bit bus
  12  * by Richard Danter (richard.danter@windriver.com), (C) 2005 Wind River Systems
  13  */
  14
  15 #if (CONFIG_SYS_NS16550_REG_SIZE == 1)
  16 struct NS16550 {
  17         unsigned char rbr;              /* 0 */
  18         unsigned char ier;              /* 1 */
  19         unsigned char fcr;              /* 2 */
  20         unsigned char lcr;              /* 3 */
  21         unsigned char mcr;              /* 4 */
  22         unsigned char lsr;              /* 5 */
  23         unsigned char msr;              /* 6 */
  24         unsigned char scr;              /* 7 */
  25 #if defined(CONFIG_OMAP730)
  26         unsigned char mdr1;             /* 8 */
  27         unsigned char reg9;             /* 9 */
  28         unsigned char regA;             /* A */
  29         unsigned char regB;             /* B */
  30         unsigned char regC;             /* C */
  31         unsigned char regD;             /* D */
  32         unsigned char regE;             /* E */
  33         unsigned char regF;             /* F */
  34         unsigned char reg10;            /* 10 */
  35         unsigned char ssr;              /* 11*/
  36 #endif
  37 } __attribute__ ((packed));
  38 #elif (CONFIG_SYS_NS16550_REG_SIZE == 2)
  39 struct NS16550 {
  40         unsigned short rbr;             /* 0 */
  41         unsigned short ier;             /* 1 */
  42         unsigned short fcr;             /* 2 */
  43         unsigned short lcr;             /* 3 */
  44         unsigned short mcr;             /* 4 */
  45         unsigned short lsr;             /* 5 */
  46         unsigned short msr;             /* 6 */
  47         unsigned short scr;             /* 7 */
  48 } __attribute__ ((packed));
  49 #elif (CONFIG_SYS_NS16550_REG_SIZE == 4)
  50 struct NS16550 {
  51         unsigned long rbr;              /* 0 r  */
  52         unsigned long ier;              /* 1 rw */
  53         unsigned long fcr;              /* 2 w  */
  54         unsigned long lcr;              /* 3 rw */
  55         unsigned long mcr;              /* 4 rw */
  56         unsigned long lsr;              /* 5 r  */
  57         unsigned long msr;              /* 6 r  */
  58         unsigned long scr;              /* 7 rw */
  59 }; /* No need to pack an already aligned struct */
  60 #elif (CONFIG_SYS_NS16550_REG_SIZE == -4)
  61 struct NS16550 {
  62         unsigned char rbr;              /* 0 */
  63         int pad1:24;
  64         unsigned char ier;              /* 1 */
  65         int pad2:24;
  66         unsigned char fcr;              /* 2 */
  67         int pad3:24;
  68         unsigned char lcr;              /* 3 */
  69         int pad4:24;
  70         unsigned char mcr;              /* 4 */
  71         int pad5:24;
  72         unsigned char lsr;              /* 5 */
  73         int pad6:24;
  74         unsigned char msr;              /* 6 */
  75         int pad7:24;
  76         unsigned char scr;              /* 7 */
  77         int pad8:24;
  78 #if defined(CONFIG_OMAP)
  79         unsigned char mdr1;             /* mode select reset TL16C750*/
  80 #endif
  81 #ifdef CONFIG_OMAP1510
  82         int pad9:24;
  83         unsigned long pad[10];
  84         unsigned char osc_12m_sel;
  85         int pad10:24;
  86 #endif
  87 } __attribute__ ((packed));
  88 #elif (CONFIG_SYS_NS16550_REG_SIZE == -8)
  89 struct NS16550 {
  90         unsigned char rbr;              /* 0 */
  91         unsigned char pad0[7];
  92         unsigned char ier;              /* 1 */
  93         unsigned char pad1[7];
  94         unsigned char fcr;              /* 2 */
  95         unsigned char pad2[7];
  96         unsigned char lcr;              /* 3 */
  97         unsigned char pad3[7];
  98         unsigned char mcr;              /* 4 */
  99         unsigned char pad4[7];
 100         unsigned char lsr;              /* 5 */
 101         unsigned char pad5[7];
 102         unsigned char msr;              /* 6 */
 103         unsigned char pad6[7];
 104         unsigned char scr;              /* 7 */
 105         unsigned char pad7[7];
 106 } __attribute__ ((packed));
 107 #else
 108 #error "Please define NS16550 registers size."
 109 #endif
 110
 111 #define thr rbr
 112 #define iir fcr
 113 #define dll rbr
 114 #define dlm ier
 115
 116 typedef volatile struct NS16550 *NS16550_t;
 117
 118 #define FCR_FIFO_EN     0x01            /* Fifo enable */
 119 #define FCR_RXSR        0x02            /* Receiver soft reset */
 120 #define FCR_TXSR        0x04            /* Transmitter soft reset */
 121
 122 #define MCR_DTR         0x01
 123 #define MCR_RTS         0x02
 124 #define MCR_DMA_EN      0x04
 125 #define MCR_TX_DFR      0x08
 126
 127 #define LCR_WLS_MSK     0x03            /* character length select mask */
 128 #define LCR_WLS_5       0x00            /* 5 bit character length */
 129 #define LCR_WLS_6       0x01            /* 6 bit character length */
 130 #define LCR_WLS_7       0x02            /* 7 bit character length */
 131 #define LCR_WLS_8       0x03            /* 8 bit character length */
 132 #define LCR_STB         0x04            /* Number of stop Bits, off = 1, on = 1.5 or 2) */
 133 #define LCR_PEN         0x08            /* Parity eneble */
 134 #define LCR_EPS         0x10            /* Even Parity Select */
 135 #define LCR_STKP        0x20            /* Stick Parity */
 136 #define LCR_SBRK        0x40            /* Set Break */
 137 #define LCR_BKSE        0x80            /* Bank select enable */
 138
 139 #define LSR_DR          0x01            /* Data ready */
 140 #define LSR_OE          0x02            /* Overrun */
 141 #define LSR_PE          0x04            /* Parity error */
 142 #define LSR_FE          0x08            /* Framing error */
 143 #define LSR_BI          0x10            /* Break */
 144 #define LSR_THRE        0x20            /* Xmit holding register empty */
 145 #define LSR_TEMT        0x40            /* Xmitter empty */
 146 #define LSR_ERR         0x80            /* Error */
 147
 148 #ifdef CONFIG_OMAP1510
 149 #define OSC_12M_SEL     0x01            /* selects 6.5 * current clk div */
 150 #endif
 151
 152 /* useful defaults for LCR */
 153 #define LCR_8N1         0x03
 154
 155 void    NS16550_init   (NS16550_t com_port, int baud_divisor);
 156 void    NS16550_putc   (NS16550_t com_port, char c);
 157 char    NS16550_getc   (NS16550_t com_port);
 158 int     NS16550_tstc   (NS16550_t com_port);
 159 void    NS16550_reinit (NS16550_t com_port, int baud_divisor);