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Diffstat (limited to 'include/powerpc/beatnik/bsp/uart.h')
| -rw-r--r-- | include/powerpc/beatnik/bsp/uart.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/include/powerpc/beatnik/bsp/uart.h b/include/powerpc/beatnik/bsp/uart.h new file mode 100644 index 0000000000..b7539b5b7b --- /dev/null +++ b/include/powerpc/beatnik/bsp/uart.h @@ -0,0 +1,190 @@ + +/* + * This software is Copyright (C) 1998 by T.sqware - all rights limited + * It is provided in to the public domain "as is", can be freely modified + * as far as this copyight notice is kept unchanged, but does not imply + * an endorsement by T.sqware of the product in which it is included. + */ + +#ifndef _BSPUART_H +#define _BSPUART_H + +#include <bsp/irq.h> + +#include <sys/ioctl.h> +#include <rtems/libio.h> + +void BSP_uart_init(int uart, int baud, int hwFlow); +void BSP_uart_set_baud(int uart, int baud); +void BSP_uart_intr_ctrl(int uart, int cmd); +void BSP_uart_throttle(int uart); +void BSP_uart_unthrottle(int uart); +int BSP_uart_polled_status(int uart); +void BSP_uart_polled_write(int uart, int val); +int BSP_uart_polled_read(int uart); +void BSP_uart_termios_set(int uart, void *ttyp); +ssize_t BSP_uart_termios_write_com(int minor, const char *buf, size_t len); +int BSP_uart_termios_read_com (int minor); +void BSP_uart_termios_isr_com1(void *unused); +void BSP_uart_termios_isr_com2(void *unused); +void BSP_uart_dbgisr_com1(void); +void BSP_uart_dbgisr_com2(void); +int BSP_uart_install_isr(int uart, rtems_irq_hdl handler); +int BSP_uart_remove_isr(int uart, rtems_irq_hdl handler); +ssize_t BSP_uart_termios_write_polled(int minor, const char *buf, size_t len); +int BSP_uart_get_break_cb(int uart, rtems_libio_ioctl_args_t *arg); +int BSP_uart_set_break_cb(int uart, rtems_libio_ioctl_args_t *arg); + +extern unsigned BSP_poll_char_via_serial(void); +extern void BSP_output_char_via_serial(const char val); +extern int BSPConsolePort; +extern int BSPBaseBaud; + +/* Special IOCTLS to install a lowlevel 'BREAK' handler */ + +/* pass a BSP_UartBreakCb pointer to ioctl when retrieving + * or installing break callback + */ +typedef void (*BSP_UartBreakCbProc)( + int uartMinor, + unsigned uartRBRLSRStatus, + void *termiosPrivatePtr, + void *private +); + +typedef struct BSP_UartBreakCbRec_ { + BSP_UartBreakCbProc handler; /* NOTE: handler runs in INTERRUPT CONTEXT */ + void *private; /* closure pointer which is passed to the callback */ +} BSP_UartBreakCbRec, *BSP_UartBreakCb; + +#define BIOCGETBREAKCB _IOR('b',1,sizeof(BSP_UartBreakCbRec)) +#define BIOCSETBREAKCB _IOW('b',2,sizeof(BSP_UartBreakCbRec)) + +/* + * Command values for BSP_uart_intr_ctrl(), + * values are strange in order to catch errors + * with assert + */ +#define BSP_UART_INTR_CTRL_DISABLE (0) +#define BSP_UART_INTR_CTRL_GDB (0xaa) /* RX only */ +#define BSP_UART_INTR_CTRL_ENABLE (0xbb) /* Normal operations */ +#define BSP_UART_INTR_CTRL_TERMIOS (0xcc) /* RX & line status */ + +/* Return values for uart_polled_status() */ +#define BSP_UART_STATUS_ERROR (-1) /* No character */ +#define BSP_UART_STATUS_NOCHAR (0) /* No character */ +#define BSP_UART_STATUS_CHAR (1) /* Character present */ +#define BSP_UART_STATUS_BREAK (2) /* Break point is detected */ + +/* PC UART definitions */ +#define BSP_UART_COM1 (0) +#define BSP_UART_COM2 (1) + +/* + * Offsets from base + */ + +/* DLAB 0 */ +#define RBR (0) /* Rx Buffer Register (read) */ +#define THR (0) /* Tx Buffer Register (write) */ +#define IER (1) /* Interrupt Enable Register */ + +/* DLAB X */ +#define IIR (2) /* Interrupt Ident Register (read) */ +#define FCR (2) /* FIFO Control Register (write) */ +#define LCR (3) /* Line Control Register */ +#define MCR (4) /* Modem Control Register */ +#define LSR (5) /* Line Status Register */ +#define MSR (6) /* Modem Status Register */ +#define SCR (7) /* Scratch register */ + +/* DLAB 1 */ +#define DLL (0) /* Divisor Latch, LSB */ +#define DLM (1) /* Divisor Latch, MSB */ +#define AFR (2) /* Alternate Function register */ + +/* + * Interrupt source definition via IIR + */ +#define MODEM_STATUS 0 +#define NO_MORE_INTR 1 +#define TRANSMITTER_HODING_REGISTER_EMPTY 2 +#define RECEIVER_DATA_AVAIL 4 +#define RECEIVER_ERROR 6 +#define CHARACTER_TIMEOUT_INDICATION 12 + +/* + * Bits definition of IER + */ +#define RECEIVE_ENABLE 0x1 +#define TRANSMIT_ENABLE 0x2 +#define RECEIVER_LINE_ST_ENABLE 0x4 +#define MODEM_ENABLE 0x8 +#define INTERRUPT_DISABLE 0x0 + +/* + * Bits definition of the Line Status Register (LSR) + */ +#define DR 0x01 /* Data Ready */ +#define OE 0x02 /* Overrun Error */ +#define PE 0x04 /* Parity Error */ +#define FE 0x08 /* Framing Error */ +#define BI 0x10 /* Break Interrupt */ +#define THRE 0x20 /* Transmitter Holding Register Empty */ +#define TEMT 0x40 /* Transmitter Empty */ +#define ERFIFO 0x80 /* Error receive Fifo */ + +/* + * Bits definition of the MODEM Control Register (MCR) + */ +#define DTR 0x01 /* Data Terminal Ready */ +#define RTS 0x02 /* Request To Send */ +#define OUT_1 0x04 /* Output 1, (reserved on COMPAQ I/O Board) */ +#define OUT_2 0x08 /* Output 2, Enable Asynchronous Port Interrupts */ +#define LB 0x10 /* Enable Internal Loop Back */ + +/* + * Bits definition of the Line Control Register (LCR) + */ +#define CHR_5_BITS 0 +#define CHR_6_BITS 1 +#define CHR_7_BITS 2 +#define CHR_8_BITS 3 + +#define WL 0x03 /* Word length mask */ +#define STB 0x04 /* 1 Stop Bit, otherwise 2 Stop Bits */ +#define PEN 0x08 /* Parity Enabled */ +#define EPS 0x10 /* Even Parity Select, otherwise Odd */ +#define SP 0x20 /* Stick Parity */ +#define BCB 0x40 /* Break Control Bit */ +#define DLAB 0x80 /* Enable Divisor Latch Access */ + +/* + * Bits definition of the MODEM Status Register (MSR) + */ +#define DCTS 0x01 /* Delta Clear To Send */ +#define DDSR 0x02 /* Delta Data Set Ready */ +#define TERI 0x04 /* Trailing Edge Ring Indicator */ +#define DDCD 0x08 /* Delta Carrier Detect Indicator */ +#define CTS 0x10 /* Clear To Send (when loop back is active) */ +#define DSR 0x20 /* Data Set Ready (when loop back is active) */ +#define RI 0x40 /* Ring Indicator (when loop back is active) */ +#define DCD 0x80 /* Data Carrier Detect (when loop back is active) */ + +/* + * Bits definition of the FIFO Control Register : WD16C552 or NS16550 + */ + +#define FIFO_CTRL 0x01 /* Set to 1 permit access to other bits */ +#define FIFO_EN 0x01 /* Enable the FIFO */ +#define XMIT_RESET 0x02 /* Transmit FIFO Reset */ +#define RCV_RESET 0x04 /* Receive FIFO Reset */ +#define FCR3 0x08 /* do not understand manual! */ + +#define RECEIVE_FIFO_TRIGGER1 0x00 /* trigger RX interrupt after 1 byte */ +#define RECEIVE_FIFO_TRIGGER4 0x40 /* trigger RX interrupt after 4 bytes */ +#define RECEIVE_FIFO_TRIGGER8 0x80 /* trigger RX interrupt after 8 bytes */ +#define RECEIVE_FIFO_TRIGGER12 0xc0 /* trigger RX interrupt after 12 bytes */ +#define TRIG_LEVEL 0xc0 /* Mask for the trigger level */ + +#endif /* _BSPUART_H */ |