Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 | /* * NS16550 Serial Port * originally from linux source (arch/ppc/boot/ns16550.h) * modified slightly to * have addresses as offsets from CFG_ISA_BASE * added a few more definitions * added prototypes for ns16550.c * reduced no of com ports to 2 * modifications (c) Rob Taylor, Flying Pig Systems. 2000. */ #if (CFG_NS16550_REG_SIZE == 1) struct NS16550 { unsigned char rbr; /* 0 */ unsigned char ier; /* 1 */ unsigned char fcr; /* 2 */ unsigned char lcr; /* 3 */ unsigned char mcr; /* 4 */ unsigned char lsr; /* 5 */ unsigned char msr; /* 6 */ unsigned char scr; /* 7 */ } __attribute__ ((packed)); #elif (CFG_NS16550_REG_SIZE == 2) struct NS16550 { unsigned short rbr; /* 0 */ unsigned short ier; /* 1 */ unsigned short fcr; /* 2 */ unsigned short lcr; /* 3 */ unsigned short mcr; /* 4 */ unsigned short lsr; /* 5 */ unsigned short msr; /* 6 */ unsigned short scr; /* 7 */ } __attribute__ ((packed)); #elif (CFG_NS16550_REG_SIZE == 4) struct NS16550 { unsigned long rbr; /* 0 */ unsigned long ier; /* 1 */ unsigned long fcr; /* 2 */ unsigned long lcr; /* 3 */ unsigned long mcr; /* 4 */ unsigned long lsr; /* 5 */ unsigned long msr; /* 6 */ unsigned long scr; /* 7 */ } __attribute__ ((packed)); #elif (CFG_NS16550_REG_SIZE == -4) struct NS16550 { unsigned char rbr; /* 0 */ int pad1:24; unsigned char ier; /* 1 */ int pad2:24; unsigned char fcr; /* 2 */ int pad3:24; unsigned char lcr; /* 3 */ int pad4:24; unsigned char mcr; /* 4 */ int pad5:24; unsigned char lsr; /* 5 */ int pad6:24; unsigned char msr; /* 6 */ int pad7:24; unsigned char scr; /* 7 */ int pad8:24; #if defined(CONFIG_OMAP1510) || defined(CONFIG_OMAP1610) unsigned char mdr1; /* mode select reset TL16C750*/ #endif #ifdef CONFIG_OMAP1510 int pad9:24; unsigned long pad[10]; unsigned char osc_12m_sel; int pad10:24; #endif } __attribute__ ((packed)); #else #error "Please define NS16550 registers size." #endif #define thr rbr #define iir fcr #define dll rbr #define dlm ier typedef volatile struct NS16550 *NS16550_t; #define FCR_FIFO_EN 0x01 /* Fifo enable */ #define FCR_RXSR 0x02 /* Receiver soft reset */ #define FCR_TXSR 0x04 /* Transmitter soft reset */ #define MCR_DTR 0x01 #define MCR_RTS 0x02 #define MCR_DMA_EN 0x04 #define MCR_TX_DFR 0x08 #define LCR_WLS_MSK 0x03 /* character length slect mask */ #define LCR_WLS_5 0x00 /* 5 bit character length */ #define LCR_WLS_6 0x01 /* 6 bit character length */ #define LCR_WLS_7 0x02 /* 7 bit character length */ #define LCR_WLS_8 0x03 /* 8 bit character length */ #define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */ #define LCR_PEN 0x08 /* Parity eneble */ #define LCR_EPS 0x10 /* Even Parity Select */ #define LCR_STKP 0x20 /* Stick Parity */ #define LCR_SBRK 0x40 /* Set Break */ #define LCR_BKSE 0x80 /* Bank select enable */ #define LSR_DR 0x01 /* Data ready */ #define LSR_OE 0x02 /* Overrun */ #define LSR_PE 0x04 /* Parity error */ #define LSR_FE 0x08 /* Framing error */ #define LSR_BI 0x10 /* Break */ #define LSR_THRE 0x20 /* Xmit holding register empty */ #define LSR_TEMT 0x40 /* Xmitter empty */ #define LSR_ERR 0x80 /* Error */ #ifdef CONFIG_OMAP1510 #define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */ #endif /* useful defaults for LCR */ #define LCR_8N1 0x03 void NS16550_init (NS16550_t com_port, int baud_divisor); void NS16550_putc (NS16550_t com_port, char c); char NS16550_getc (NS16550_t com_port); int NS16550_tstc (NS16550_t com_port); void NS16550_reinit (NS16550_t com_port, int baud_divisor); |