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Diffstat (limited to 'board/Marvell/common/ns16550.h')
-rw-r--r--board/Marvell/common/ns16550.h102
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diff --git a/board/Marvell/common/ns16550.h b/board/Marvell/common/ns16550.h
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+++ b/board/Marvell/common/ns16550.h
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+/*
+ * 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.
+ *
+ * further modified to support the DUART in the Galileo eval board
+ * modifications (c) Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
+ */
+
+#ifndef __NS16550_H__
+#define __NS16550_H__
+
+/* the padding is necessary because on the galileo board the UART is
+ wired in with the 3 address lines shifted over by 2 bits */
+struct NS16550
+{
+ unsigned char rbr; /* 0 = 0-3*/
+ int pad1:24;
+
+ unsigned char ier; /* 1 = 4-7*/
+ int pad2:24;
+
+ unsigned char fcr; /* 2 = 8-b*/
+ int pad3:24;
+
+ unsigned char lcr; /* 3 = c-f*/
+ int pad4:24;
+
+ unsigned char mcr; /* 4 = 10-13*/
+ int pad5:24;
+
+ unsigned char lsr; /* 5 = 14-17*/
+ int pad6:24;
+
+ unsigned char msr; /* 6 =18-1b*/
+ int pad7:24;
+
+ unsigned char scr; /* 7 =1c-1f*/
+ int pad8:24;
+} __attribute__ ((packed));
+
+/* aliases */
+#define thr rbr
+#define iir fcr
+#define dll rbr
+#define dlm ier
+
+#define FCR_FIFO_EN 0x01 /*fifo enable*/
+#define FCR_RXSR 0x02 /*reciever 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 */
+
+/* useful defaults for LCR*/
+#define LCR_8N1 0x03
+
+
+#define COM1 0x03F8
+#define COM2 0x02F8
+
+volatile struct NS16550 * NS16550_init(int chan, int baud_divisor);
+void NS16550_putc(volatile struct NS16550 *com_port, unsigned char c);
+unsigned char NS16550_getc(volatile struct NS16550 *com_port);
+int NS16550_tstc(volatile struct NS16550 *com_port);
+void NS16550_reinit(volatile struct NS16550 *com_port, int baud_divisor);
+
+typedef struct NS16550 *NS16550_t;
+
+extern const NS16550_t COM_PORTS[];
+
+#endif