9399575dd3
This a set of fixes mostly to make the driver actually work: 1. Actually select the line for setting parameters and receiver disable/enable. 2. Select the line for receive and transmit interrupt handling correctly. 3. Report the transmitter empty state correctly. 4. Set the I/O type of ports correctly. 5. Perform polled transmission correctly. 6. Don't fix the console line at ttyS3. 7. Magic SysRq support. 8. Various small bits here and there. Tested with a DECstation 2100 (thanks Flo for making this possible). [akpm@osdl.org: fix typo] Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
132 lines
5.4 KiB
C
132 lines
5.4 KiB
C
/*
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* dz.h: Serial port driver for DECstations equipped
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* with the DZ chipset.
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*
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* Copyright (C) 1998 Olivier A. D. Lebaillif
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*
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* Email: olivier.lebaillif@ifrsys.com
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*
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* Copyright (C) 2004, 2006 Maciej W. Rozycki
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*/
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#ifndef DZ_SERIAL_H
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#define DZ_SERIAL_H
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/*
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* Definitions for the Control and Status Register.
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*/
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#define DZ_TRDY 0x8000 /* Transmitter empty */
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#define DZ_TIE 0x4000 /* Transmitter Interrupt Enbl */
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#define DZ_TLINE 0x0300 /* Transmitter Line Number */
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#define DZ_RDONE 0x0080 /* Receiver data ready */
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#define DZ_RIE 0x0040 /* Receive Interrupt Enable */
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#define DZ_MSE 0x0020 /* Master Scan Enable */
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#define DZ_CLR 0x0010 /* Master reset */
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#define DZ_MAINT 0x0008 /* Loop Back Mode */
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/*
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* Definitions for the Receiver Buffer Register.
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*/
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#define DZ_RBUF_MASK 0x00FF /* Data Mask */
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#define DZ_LINE_MASK 0x0300 /* Line Mask */
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#define DZ_DVAL 0x8000 /* Valid Data indicator */
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#define DZ_OERR 0x4000 /* Overrun error indicator */
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#define DZ_FERR 0x2000 /* Frame error indicator */
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#define DZ_PERR 0x1000 /* Parity error indicator */
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#define LINE(x) ((x & DZ_LINE_MASK) >> 8) /* Get the line number
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from the input buffer */
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#define UCHAR(x) ((unsigned char)(x & DZ_RBUF_MASK))
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/*
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* Definitions for the Transmit Control Register.
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*/
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#define DZ_LINE_KEYBOARD 0x0001
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#define DZ_LINE_MOUSE 0x0002
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#define DZ_LINE_MODEM 0x0004
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#define DZ_LINE_PRINTER 0x0008
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#define DZ_MODEM_RTS 0x0800 /* RTS for the modem line (2) */
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#define DZ_MODEM_DTR 0x0400 /* DTR for the modem line (2) */
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#define DZ_PRINT_RTS 0x0200 /* RTS for the prntr line (3) */
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#define DZ_PRINT_DTR 0x0100 /* DTR for the prntr line (3) */
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#define DZ_LNENB 0x000f /* Transmitter Line Enable */
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/*
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* Definitions for the Modem Status Register.
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*/
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#define DZ_MODEM_RI 0x0800 /* RI for the modem line (2) */
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#define DZ_MODEM_CD 0x0400 /* CD for the modem line (2) */
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#define DZ_MODEM_DSR 0x0200 /* DSR for the modem line (2) */
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#define DZ_MODEM_CTS 0x0100 /* CTS for the modem line (2) */
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#define DZ_PRINT_RI 0x0008 /* RI for the printer line (3) */
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#define DZ_PRINT_CD 0x0004 /* CD for the printer line (3) */
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#define DZ_PRINT_DSR 0x0002 /* DSR for the prntr line (3) */
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#define DZ_PRINT_CTS 0x0001 /* CTS for the prntr line (3) */
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/*
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* Definitions for the Transmit Data Register.
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*/
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#define DZ_BRK0 0x0100 /* Break assertion for line 0 */
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#define DZ_BRK1 0x0200 /* Break assertion for line 1 */
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#define DZ_BRK2 0x0400 /* Break assertion for line 2 */
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#define DZ_BRK3 0x0800 /* Break assertion for line 3 */
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/*
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* Definitions for the Line Parameter Register.
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*/
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#define DZ_KEYBOARD 0x0000 /* line 0 = keyboard */
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#define DZ_MOUSE 0x0001 /* line 1 = mouse */
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#define DZ_MODEM 0x0002 /* line 2 = modem */
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#define DZ_PRINTER 0x0003 /* line 3 = printer */
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#define DZ_CSIZE 0x0018 /* Number of bits per byte (mask) */
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#define DZ_CS5 0x0000 /* 5 bits per byte */
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#define DZ_CS6 0x0008 /* 6 bits per byte */
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#define DZ_CS7 0x0010 /* 7 bits per byte */
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#define DZ_CS8 0x0018 /* 8 bits per byte */
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#define DZ_CSTOPB 0x0020 /* 2 stop bits instead of one */
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#define DZ_PARENB 0x0040 /* Parity enable */
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#define DZ_PARODD 0x0080 /* Odd parity instead of even */
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#define DZ_CBAUD 0x0E00 /* Baud Rate (mask) */
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#define DZ_B50 0x0000
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#define DZ_B75 0x0100
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#define DZ_B110 0x0200
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#define DZ_B134 0x0300
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#define DZ_B150 0x0400
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#define DZ_B300 0x0500
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#define DZ_B600 0x0600
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#define DZ_B1200 0x0700
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#define DZ_B1800 0x0800
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#define DZ_B2000 0x0900
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#define DZ_B2400 0x0A00
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#define DZ_B3600 0x0B00
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#define DZ_B4800 0x0C00
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#define DZ_B7200 0x0D00
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#define DZ_B9600 0x0E00
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#define DZ_CREAD 0x1000 /* Enable receiver */
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#define DZ_RXENAB 0x1000 /* enable receive char */
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/*
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* Addresses for the DZ registers
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*/
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#define DZ_CSR 0x00 /* Control and Status Register */
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#define DZ_RBUF 0x08 /* Receive Buffer */
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#define DZ_LPR 0x08 /* Line Parameters Register */
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#define DZ_TCR 0x10 /* Transmitter Control Register */
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#define DZ_MSR 0x18 /* Modem Status Register */
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#define DZ_TDR 0x18 /* Transmit Data Register */
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#define DZ_NB_PORT 4
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#define DZ_XMIT_SIZE 4096 /* buffer size */
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#define DZ_WAKEUP_CHARS DZ_XMIT_SIZE/4
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#ifdef MODULE
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int init_module (void)
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void cleanup_module (void)
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#endif
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#endif /* DZ_SERIAL_H */
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