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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.
- */
- #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;
- #ifdef CONFIG_OMAP1510
- unsigned char mdr1; /* mode select reset TL16C750*/
- 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);
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