3 * originally from linux source (arch/powerpc/boot/ns16550.h)
5 * Cleanup and unification
6 * (C) 2009 by Detlev Zundel, DENX Software Engineering GmbH
9 * have addresses as offsets from CONFIG_SYS_ISA_BASE
10 * added a few more definitions
11 * added prototypes for ns16550.c
12 * reduced no of com ports to 2
13 * modifications (c) Rob Taylor, Flying Pig Systems. 2000.
15 * added support for port on 64-bit bus
16 * by Richard Danter (richard.danter@windriver.com), (C) 2005 Wind River Systems
20 * Note that the following macro magic uses the fact that the compiler
21 * will not allocate storage for arrays of size 0
24 #include <linux/types.h>
26 #if !defined(CONFIG_SYS_NS16550_REG_SIZE) || (CONFIG_SYS_NS16550_REG_SIZE == 0)
27 #error "Please define NS16550 registers size."
28 #elif defined(CONFIG_SYS_NS16550_MEM32)
29 #define UART_REG(x) u32 x
30 #elif (CONFIG_SYS_NS16550_REG_SIZE > 0)
32 unsigned char prepad_##x[CONFIG_SYS_NS16550_REG_SIZE - 1]; \
34 #elif (CONFIG_SYS_NS16550_REG_SIZE < 0)
37 unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1];
41 UART_REG(rbr); /* 0 */
42 UART_REG(ier); /* 1 */
43 UART_REG(fcr); /* 2 */
44 UART_REG(lcr); /* 3 */
45 UART_REG(mcr); /* 4 */
46 UART_REG(lsr); /* 5 */
47 UART_REG(msr); /* 6 */
48 UART_REG(spr); /* 7 */
49 #ifdef CONFIG_SOC_DA8XX
50 UART_REG(reg8); /* 8 */
51 UART_REG(reg9); /* 9 */
52 UART_REG(revid1); /* A */
53 UART_REG(revid2); /* B */
54 UART_REG(pwr_mgmt); /* C */
55 UART_REG(mdr1); /* D */
57 UART_REG(mdr1); /* 8 */
58 UART_REG(reg9); /* 9 */
59 UART_REG(regA); /* A */
60 UART_REG(regB); /* B */
61 UART_REG(regC); /* C */
62 UART_REG(regD); /* D */
63 UART_REG(regE); /* E */
64 UART_REG(uasr); /* F */
65 UART_REG(scr); /* 10*/
66 UART_REG(ssr); /* 11*/
75 typedef struct NS16550 *NS16550_t;
78 * These are the definitions for the FIFO Control Register
80 #define UART_FCR_FIFO_EN 0x01 /* Fifo enable */
81 #define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */
82 #define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */
83 #define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */
84 #define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */
85 #define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */
86 #define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */
87 #define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */
88 #define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */
90 #define UART_FCR_RXSR 0x02 /* Receiver soft reset */
91 #define UART_FCR_TXSR 0x04 /* Transmitter soft reset */
94 * These are the definitions for the Modem Control Register
96 #define UART_MCR_DTR 0x01 /* DTR */
97 #define UART_MCR_RTS 0x02 /* RTS */
98 #define UART_MCR_OUT1 0x04 /* Out 1 */
99 #define UART_MCR_OUT2 0x08 /* Out 2 */
100 #define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
101 #define UART_MCR_AFE 0x20 /* Enable auto-RTS/CTS */
103 #define UART_MCR_DMA_EN 0x04
104 #define UART_MCR_TX_DFR 0x08
107 * These are the definitions for the Line Control Register
109 * Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
110 * UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
112 #define UART_LCR_WLS_MSK 0x03 /* character length select mask */
113 #define UART_LCR_WLS_5 0x00 /* 5 bit character length */
114 #define UART_LCR_WLS_6 0x01 /* 6 bit character length */
115 #define UART_LCR_WLS_7 0x02 /* 7 bit character length */
116 #define UART_LCR_WLS_8 0x03 /* 8 bit character length */
117 #define UART_LCR_STB 0x04 /* # stop Bits, off=1, on=1.5 or 2) */
118 #define UART_LCR_PEN 0x08 /* Parity eneble */
119 #define UART_LCR_EPS 0x10 /* Even Parity Select */
120 #define UART_LCR_STKP 0x20 /* Stick Parity */
121 #define UART_LCR_SBRK 0x40 /* Set Break */
122 #define UART_LCR_BKSE 0x80 /* Bank select enable */
123 #define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
126 * These are the definitions for the Line Status Register
128 #define UART_LSR_DR 0x01 /* Data ready */
129 #define UART_LSR_OE 0x02 /* Overrun */
130 #define UART_LSR_PE 0x04 /* Parity error */
131 #define UART_LSR_FE 0x08 /* Framing error */
132 #define UART_LSR_BI 0x10 /* Break */
133 #define UART_LSR_THRE 0x20 /* Xmit holding register empty */
134 #define UART_LSR_TEMT 0x40 /* Xmitter empty */
135 #define UART_LSR_ERR 0x80 /* Error */
137 #define UART_MSR_DCD 0x80 /* Data Carrier Detect */
138 #define UART_MSR_RI 0x40 /* Ring Indicator */
139 #define UART_MSR_DSR 0x20 /* Data Set Ready */
140 #define UART_MSR_CTS 0x10 /* Clear to Send */
141 #define UART_MSR_DDCD 0x08 /* Delta DCD */
142 #define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
143 #define UART_MSR_DDSR 0x02 /* Delta DSR */
144 #define UART_MSR_DCTS 0x01 /* Delta CTS */
147 * These are the definitions for the Interrupt Identification Register
149 #define UART_IIR_NO_INT 0x01 /* No interrupts pending */
150 #define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
152 #define UART_IIR_MSI 0x00 /* Modem status interrupt */
153 #define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
154 #define UART_IIR_RDI 0x04 /* Receiver data interrupt */
155 #define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
158 * These are the definitions for the Interrupt Enable Register
160 #define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
161 #define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
162 #define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
163 #define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
165 /* useful defaults for LCR */
166 #define UART_LCR_8N1 0x03
168 void NS16550_init(NS16550_t com_port, int baud_divisor);
169 void NS16550_putc(NS16550_t com_port, char c);
170 char NS16550_getc(NS16550_t com_port);
171 int NS16550_tstc(NS16550_t com_port);
172 void NS16550_reinit(NS16550_t com_port, int baud_divisor);