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 CFG_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 12 #if (CFG_NS16550_REG_SIZE == 1) 13 struct NS16550 { 14 unsigned char rbr; /* 0 */ 15 unsigned char ier; /* 1 */ 16 unsigned char fcr; /* 2 */ 17 unsigned char lcr; /* 3 */ 18 unsigned char mcr; /* 4 */ 19 unsigned char lsr; /* 5 */ 20 unsigned char msr; /* 6 */ 21 unsigned char scr; /* 7 */ 22 #if defined(CONFIG_OMAP730) 23 unsigned char mdr1; /* 8 */ 24 unsigned char reg9; /* 9 */ 25 unsigned char regA; /* A */ 26 unsigned char regB; /* B */ 27 unsigned char regC; /* C */ 28 unsigned char regD; /* D */ 29 unsigned char regE; /* E */ 30 unsigned char regF; /* F */ 31 unsigned char reg10; /* 10 */ 32 unsigned char ssr; /* 11*/ 33 #endif 34 } __attribute__ ((packed)); 35 #elif (CFG_NS16550_REG_SIZE == 2) 36 struct NS16550 { 37 unsigned short rbr; /* 0 */ 38 unsigned short ier; /* 1 */ 39 unsigned short fcr; /* 2 */ 40 unsigned short lcr; /* 3 */ 41 unsigned short mcr; /* 4 */ 42 unsigned short lsr; /* 5 */ 43 unsigned short msr; /* 6 */ 44 unsigned short scr; /* 7 */ 45 } __attribute__ ((packed)); 46 #elif (CFG_NS16550_REG_SIZE == 4) 47 struct NS16550 { 48 unsigned long rbr; /* 0 */ 49 unsigned long ier; /* 1 */ 50 unsigned long fcr; /* 2 */ 51 unsigned long lcr; /* 3 */ 52 unsigned long mcr; /* 4 */ 53 unsigned long lsr; /* 5 */ 54 unsigned long msr; /* 6 */ 55 unsigned long scr; /* 7 */ 56 } __attribute__ ((packed)); 57 #elif (CFG_NS16550_REG_SIZE == -4) 58 struct NS16550 { 59 unsigned char rbr; /* 0 */ 60 int pad1:24; 61 unsigned char ier; /* 1 */ 62 int pad2:24; 63 unsigned char fcr; /* 2 */ 64 int pad3:24; 65 unsigned char lcr; /* 3 */ 66 int pad4:24; 67 unsigned char mcr; /* 4 */ 68 int pad5:24; 69 unsigned char lsr; /* 5 */ 70 int pad6:24; 71 unsigned char msr; /* 6 */ 72 int pad7:24; 73 unsigned char scr; /* 7 */ 74 int pad8:24; 75 #if defined(CONFIG_OMAP) 76 unsigned char mdr1; /* mode select reset TL16C750*/ 77 #endif 78 #ifdef CONFIG_OMAP1510 79 int pad9:24; 80 unsigned long pad[10]; 81 unsigned char osc_12m_sel; 82 int pad10:24; 83 #endif 84 } __attribute__ ((packed)); 85 #else 86 #error "Please define NS16550 registers size." 87 #endif 88 89 #define thr rbr 90 #define iir fcr 91 #define dll rbr 92 #define dlm ier 93 94 typedef volatile struct NS16550 *NS16550_t; 95 96 #define FCR_FIFO_EN 0x01 /* Fifo enable */ 97 #define FCR_RXSR 0x02 /* Receiver soft reset */ 98 #define FCR_TXSR 0x04 /* Transmitter soft reset */ 99 100 #define MCR_DTR 0x01 101 #define MCR_RTS 0x02 102 #define MCR_DMA_EN 0x04 103 #define MCR_TX_DFR 0x08 104 105 #define LCR_WLS_MSK 0x03 /* character length slect mask */ 106 #define LCR_WLS_5 0x00 /* 5 bit character length */ 107 #define LCR_WLS_6 0x01 /* 6 bit character length */ 108 #define LCR_WLS_7 0x02 /* 7 bit character length */ 109 #define LCR_WLS_8 0x03 /* 8 bit character length */ 110 #define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */ 111 #define LCR_PEN 0x08 /* Parity eneble */ 112 #define LCR_EPS 0x10 /* Even Parity Select */ 113 #define LCR_STKP 0x20 /* Stick Parity */ 114 #define LCR_SBRK 0x40 /* Set Break */ 115 #define LCR_BKSE 0x80 /* Bank select enable */ 116 117 #define LSR_DR 0x01 /* Data ready */ 118 #define LSR_OE 0x02 /* Overrun */ 119 #define LSR_PE 0x04 /* Parity error */ 120 #define LSR_FE 0x08 /* Framing error */ 121 #define LSR_BI 0x10 /* Break */ 122 #define LSR_THRE 0x20 /* Xmit holding register empty */ 123 #define LSR_TEMT 0x40 /* Xmitter empty */ 124 #define LSR_ERR 0x80 /* Error */ 125 126 #ifdef CONFIG_OMAP1510 127 #define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */ 128 #endif 129 130 /* useful defaults for LCR */ 131 #define LCR_8N1 0x03 132 133 void NS16550_init (NS16550_t com_port, int baud_divisor); 134 void NS16550_putc (NS16550_t com_port, char c); 135 char NS16550_getc (NS16550_t com_port); 136 int NS16550_tstc (NS16550_t com_port); 137 void NS16550_reinit (NS16550_t com_port, int baud_divisor); 138