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 #define MCR_LOOP 0x10 /* Enable loopback test mode */ 127 128 #define LCR_WLS_MSK 0x03 /* character length select mask */ 129 #define LCR_WLS_5 0x00 /* 5 bit character length */ 130 #define LCR_WLS_6 0x01 /* 6 bit character length */ 131 #define LCR_WLS_7 0x02 /* 7 bit character length */ 132 #define LCR_WLS_8 0x03 /* 8 bit character length */ 133 #define LCR_STB 0x04 /* Number of stop Bits, off = 1, on = 1.5 or 2) */ 134 #define LCR_PEN 0x08 /* Parity eneble */ 135 #define LCR_EPS 0x10 /* Even Parity Select */ 136 #define LCR_STKP 0x20 /* Stick Parity */ 137 #define LCR_SBRK 0x40 /* Set Break */ 138 #define LCR_BKSE 0x80 /* Bank select enable */ 139 #define LCR_DLAB 0x80 /* Divisor latch access bit */ 140 141 #define LSR_DR 0x01 /* Data ready */ 142 #define LSR_OE 0x02 /* Overrun */ 143 #define LSR_PE 0x04 /* Parity error */ 144 #define LSR_FE 0x08 /* Framing error */ 145 #define LSR_BI 0x10 /* Break */ 146 #define LSR_THRE 0x20 /* Xmit holding register empty */ 147 #define LSR_TEMT 0x40 /* Xmitter empty */ 148 #define LSR_ERR 0x80 /* Error */ 149 150 #define MSR_DCD 0x80 /* Data Carrier Detect */ 151 #define MSR_RI 0x40 /* Ring Indicator */ 152 #define MSR_DSR 0x20 /* Data Set Ready */ 153 #define MSR_CTS 0x10 /* Clear to Send */ 154 #define MSR_DDCD 0x08 /* Delta DCD */ 155 #define MSR_TERI 0x04 /* Trailing edge ring indicator */ 156 #define MSR_DDSR 0x02 /* Delta DSR */ 157 #define MSR_DCTS 0x01 /* Delta CTS */ 158 159 #ifdef CONFIG_OMAP1510 160 #define OSC_12M_SEL 0x01 /* selects 6.5 * current clk div */ 161 #endif 162 163 /* useful defaults for LCR */ 164 #define LCR_8N1 0x03 165 166 void NS16550_init (NS16550_t com_port, int baud_divisor); 167 void NS16550_putc (NS16550_t com_port, char c); 168 char NS16550_getc (NS16550_t com_port); 169 int NS16550_tstc (NS16550_t com_port); 170 void NS16550_reinit (NS16550_t com_port, int baud_divisor); 171