314 lines
15 KiB
C
314 lines
15 KiB
C
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/*
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* Device driver for Specialix I/O8+ multiport serial card.
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*
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* Copyright 2003 Frank Mayhar <frank@exit.com>
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*
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* Derived from the "si" driver by Peter Wemm <peter@netplex.com.au>, using
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* lots of information from the Linux "specialix" driver by Roger Wolff
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* <R.E.Wolff@BitWizard.nl> and from the Intel CD1865 "Intelligent Eight-
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* Channel Communications Controller" datasheet. Roger was also nice
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* enough to answer numerous questions about stuff specific to the I/O8+
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* not covered by the CD1865 datasheet.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notices, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notices, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHORS BE LIABLE.
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*
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* $FreeBSD$
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*/
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/* CD1865 chip register definitions. */
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/*
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* Service Match Register interrupt acknowledgement values.
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*
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* These values are "obligatory" if you use the register based
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* interrupt acknowledgements; the wrong values can cause a lockup.
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* See section 8.11.1 of the Intel CD1865 "Intelligent Eight-Channel
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* Communications Controller" datasheet.
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*/
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#define CD1865_ACK_MINT 0x75 /* goes to MSMR */
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#define CD1865_ACK_TINT 0x76 /* goes to TSMR */
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#define CD1865_ACK_RINT 0x77 /* goes to RSMR */
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#define CD1865_NUMCHAN 8 /* Total number of channels. */
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#define CD1865_CHARTICK 16 /* Ticks per character. */
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#define CD1865_TFIFOSZ 8 /* TX FIFO size. */
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#define CD1865_RFIFOSZ 8 /* RX FIFO size. */
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/*
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* Global registers.
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* These registers are not associated with any particular channel;
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* some define the general behavior of the card and others are only
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* active during service requests.
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*/
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#define CD1865_GIVR 0x40 /* Global Interrupt Vector Register. */
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/* The CD1865 datasheet calls this the */
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/* "Global Vector Register" _and_ the */
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/* "Global Service Vector Register," GSVR. */
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#define CD1865_GSVR CD1865_GIVR
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#define CD1865_GICR 0x41 /* Global Interrupting Channel Register. */
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/* The CD1865 datasheet calls this the */
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/* "Global Channel Register 1," GSCR1. */
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#define CD1865_GSCR1 CD1865_GICR
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#define CD1865_GSCR2 0x42 /* Global Channel Register 2. */
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#define CD1865_GSCR3 0x43 /* Global Channel Register 3. */
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#define CD1865_MSMR 0x61 /* Priority Interrupt Level Register 1. */
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#define CD1865_TSMR 0x62 /* Priority Interrupt Level Register 2. */
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#define CD1865_RSMR 0x63 /* Priority Interrupt Level Register 3. */
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#define CD1865_CAR 0x64 /* Channel Access Register. */
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#define CD1865_SRSR 0x65 /* Service Request Status Register. */
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#define CD1865_SRCR 0x66 /* Service Request Configuration Register. */
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#define CD1865_GFRCR 0x6b /* Global Firmware Revision Code Register. */
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#define CD1865_PPRH 0x70 /* Prescaler Period Register High. */
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#define CD1865_PPRL 0x71 /* Prescaler Period Register Low. */
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#define CD1865_RDR 0x78 /* Receiver Data Register. */
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#define CD1865_RCSR 0x7a /* Receiver Character Status Register. */
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#define CD1865_TDR 0x7b /* Transmit Data Register. */
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#define CD1865_EOIR 0x7f /* End of Interrupt Register. */
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#define CD1865_MRAR 0x75 /* Modem Request Acknowlege Register. */
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#define CD1865_TRAR 0x76 /* Transmit Request Acknowlege Register. */
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#define CD1865_RRAR 0x77 /* Receive Request Acknowlege Register. */
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/*
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* Channel Registers
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* These registers control or provide status for individual channels.
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* Use the CD1865_CAR register to set up access to the channel before
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* using these registers.
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*/
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#define CD1865_CCR 0x01 /* Channel Command Register. */
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#define CD1865_IER 0x02 /* Interrupt Enable Register. */
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/* The CD1865 datasheet calls this the */
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/* "Service Request Enable Register," SRER. */
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#define CD1865_SRER CD1865_IER
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#define CD1865_COR1 0x03 /* Channel Option Register 1. */
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#define CD1865_COR2 0x04 /* Channel Option Register 2. */
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#define CD1865_COR3 0x05 /* Channel Option Register 3. */
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#define CD1865_CCSR 0x06 /* Channel Control Status Register. */
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#define CD1865_RDCR 0x07 /* Receive Data Count Register. */
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#define CD1865_SCHR1 0x09 /* Special Character Register 1. */
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#define CD1865_SCHR2 0x0a /* Special Character Register 2. */
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#define CD1865_SCHR3 0x0b /* Special Character Register 3. */
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#define CD1865_SCHR4 0x0c /* Special Character Register 4. */
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#define CD1865_MCOR1 0x10 /* Modem Change Option 1 Register. */
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#define CD1865_MCOR2 0x11 /* Modem Change Option 2 Register. */
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#define CD1865_MCR 0x12 /* Modem Change Register. */
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#define CD1865_RTPR 0x18 /* Receive Timeout Period Register. */
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#define CD1865_MSVR 0x28 /* Modem Signal Value Register. */
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#define CD1865_MSVRTS 0x29 /* Modem Signal Value Register. */
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#define CD1865_MSVDTR 0x2a /* Modem Signal Value Register. */
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#define CD1865_RBPRH 0x31 /* Receive Baud Rate Period Register High. */
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#define CD1865_RBPRL 0x32 /* Receive Baud Rate Period Register Low. */
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#define CD1865_TBPRH 0x39 /* Transmit Baud Rate Period Register High. */
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#define CD1865_TBPRL 0x3a /* Transmit Baud Rate Period Register Low. */
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/*
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* Global Interrupt Vector Register, read/write (0x40).
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*/
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#define CD1865_GIVR_ITMASK 0x07 /* Interrupt type mask. */
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#define CD1865_GIVR_IT_MODEM 0x01 /* Modem Signal Change Interrupt. */
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#define CD1865_GIVR_IT_TX 0x02 /* Transmit Data Interrupt. */
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#define CD1865_GIVR_IT_RCV 0x03 /* Receive Good Data Interrupt. */
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#define CD1865_GIVR_IT_REXC 0x07 /* Receive Exception Interrupt. */
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/*
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* Global Interrupt Channel Register read/write (0x41)
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*/
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#define CD1865_GICR_CHAN_MASK 0x1c /* Channel Number Mask. */
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#define CD1865_GICR_CHAN_SHIFT 2 /* Channel Number shift. */
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/*
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* Channel Access Register, read/write (0x64).
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*/
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#define CD1865_CAR_CHAN_MASK 0x07 /* Channel Number Mask. */
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#define CD1865_CAR_A7 0x08 /* A7 Address Extension (unused). */
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/*
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* Receive Character Status Register, readonly (0x7a).
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*/
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#define CD1865_RCSR_TOUT 0x80 /* Rx Timeout. */
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#define CD1865_RCSR_SCDET 0x70 /* Special Character Detected Mask. */
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#define CD1865_RCSR_NO_SC 0x00 /* No Special Characters Detected. */
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#define CD1865_RCSR_SC_1 0x10 /* Special Char 1 (or 1 & 3) Detected. */
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#define CD1865_RCSR_SC_2 0x20 /* Special Char 2 (or 2 & 4) Detected. */
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#define CD1865_RCSR_SC_3 0x30 /* Special Char 3 Detected. */
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#define CD1865_RCSR_SC_4 0x40 /* Special Char 4 Detected. */
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#define CD1865_RCSR_BREAK 0x08 /* Break detected. */
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#define CD1865_RCSR_PE 0x04 /* Parity Error. */
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#define CD1865_RCSR_FE 0x02 /* Frame Error. */
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#define CD1865_RCSR_OE 0x01 /* Overrun Error. */
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/*
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* Channel Command Register, read/write (0x01)
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* Commands in groups can be OR-ed together.
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*/
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#define CD1865_CCR_HARDRESET 0x81 /* Reset the CD1865 (like a powercycle). */
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#define CD1865_CCR_SOFTRESET 0x80 /* Soft Channel Reset (one channel). */
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#define CD1865_CCR_CORCHG1 0x42 /* Channel Option Register 1 Changed. */
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#define CD1865_CCR_CORCHG2 0x44 /* Channel Option Register 2 Changed. */
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#define CD1865_CCR_CORCHG3 0x48 /* Channel Option Register 3 Changed. */
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#define CD1865_CCR_SSCH1 0x21 /* Send Special Character 1. */
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#define CD1865_CCR_SSCH2 0x22 /* Send Special Character 2. */
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#define CD1865_CCR_SSCH3 0x23 /* Send Special Character 3. */
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#define CD1865_CCR_SSCH4 0x24 /* Send Special Character 4. */
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#define CD1865_CCR_TXEN 0x18 /* Enable Transmitter. */
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#define CD1865_CCR_RXEN 0x12 /* Enable Receiver. */
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#define CD1865_CCR_TXDIS 0x14 /* Disable Transmitter. */
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#define CD1865_CCR_RXDIS 0x11 /* Disable Receiver. */
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/*
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* Interrupt Enable Register, read/write (0x02).
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* (aka Service Request Enable Register)
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*/
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#define CD1865_IER_DSR 0x80 /* Enable DSR change interrupt. */
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#define CD1865_IER_CD 0x40 /* Enable CD change interrupt. */
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#define CD1865_IER_CTS 0x20 /* Enable CTS change interrupt. */
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#define CD1865_IER_RXD 0x10 /* Enable Receive Data interrupt. */
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#define CD1865_IER_RXSC 0x08 /* Enable Receive Special Character int. */
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#define CD1865_IER_TXRDY 0x04 /* Enable Transmit ready interrupt. */
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#define CD1865_IER_TXEMPTY 0x02 /* Enable Transmit empty interrupt. */
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#define CD1865_IER_NNDT 0x01 /* Enable "No New Data Timeout" int. */
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/*
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* Channel Option Register 1, read/write (0x03).
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*/
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#define CD1865_COR1_ODDP 0x80 /* Odd Parity. */
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#define CD1865_COR1_PARMODE 0x60 /* Parity enable mask. */
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#define CD1865_COR1_NOPAR 0x00 /* No Parity. */
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#define CD1865_COR1_FORCEPAR 0x20 /* Force Parity. */
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#define CD1865_COR1_NORMPAR 0x40 /* Normal Parity. */
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#define CD1865_COR1_IGNORE 0x10 /* Ignore Parity on RX. */
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#define CD1865_COR1_STOPBITS 0x0c /* Number of Stop Bits. */
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#define CD1865_COR1_1SB 0x00 /* 1 Stop Bit. */
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#define CD1865_COR1_15SB 0x04 /* 1.5 Stop Bits. */
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#define CD1865_COR1_2SB 0x08 /* 2 Stop Bits. */
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#define CD1865_COR1_CHARLEN 0x03 /* Character Length. */
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#define CD1865_COR1_5BITS 0x00 /* 5 bits. */
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#define CD1865_COR1_6BITS 0x01 /* 6 bits. */
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#define CD1865_COR1_7BITS 0x02 /* 7 bits. */
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#define CD1865_COR1_8BITS 0x03 /* 8 bits. */
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/*
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* Channel Option Register 2, read/write (0x04).
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*/
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#define CD1865_COR2_IXM 0x80 /* Implied XON mode. */
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#define CD1865_COR2_TXIBE 0x40 /* Enable In-Band (XON/XOFF) Flow Control*/
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#define CD1865_COR2_ETC 0x20 /* Embedded Tx Commands Enable. */
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#define CD1865_COR2_LLM 0x10 /* Local Loopback Mode. */
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#define CD1865_COR2_RLM 0x08 /* Remote Loopback Mode. */
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#define CD1865_COR2_RTSAO 0x04 /* RTS Automatic Output Enable. */
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#define CD1865_COR2_CTSAE 0x02 /* CTS Automatic Enable. */
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#define CD1865_COR2_DSRAE 0x01 /* DSR Automatic Enable. */
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/*
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* Channel Option Register 3, read/write (0x05).
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*/
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#define CD1865_COR3_XONCH 0x80 /* XON is a pair of characters (1 & 3). */
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#define CD1865_COR3_XOFFCH 0x40 /* XOFF is a pair of characters (2 & 4). */
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#define CD1865_COR3_FCT 0x20 /* Flow-Control Transparency Mode. */
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#define CD1865_COR3_SCDE 0x10 /* Special Character Detection Enable. */
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#define CD1865_COR3_RXTH 0x0f /* RX FIFO Threshold value (1-8). */
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/*
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* Channel Control Status Register, readonly (0x06)
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*/
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#define CD1865_CCSR_RXEN 0x80 /* Receiver Enabled. */
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#define CD1865_CCSR_RXFLOFF 0x40 /* Receive Flow Off (XOFF was sent). */
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#define CD1865_CCSR_RXFLON 0x20 /* Receive Flow On (XON was sent). */
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#define CD1865_CCSR_TXEN 0x08 /* Transmitter Enabled. */
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#define CD1865_CCSR_TXFLOFF 0x04 /* Transmit Flow Off (got XOFF). */
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#define CD1865_CCSR_TXFLON 0x02 /* Transmit Flow On (got XON). */
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/*
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* Modem Change Option Register 1, read/write (0x10).
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*/
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#define CD1865_MCOR1_DSRZD 0x80 /* Detect 0->1 transition of DSR. */
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#define CD1865_MCOR1_CDZD 0x40 /* Detect 0->1 transition of CD. */
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#define CD1865_MCOR1_CTSZD 0x20 /* Detect 0->1 transition of CTS. */
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#define CD1865_MCOR1_DTRTH 0x0f /* Auto DTR flow control Threshold (1-8).*/
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#define CD1865_MCOR1_NODTRFC 0x0 /* Automatic DTR flow control disabled. */
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/*
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* Modem Change Option Register 2, read/write (0x11).
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*/
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#define CD1865_MCOR2_DSROD 0x80 /* Detect 1->0 transition of DSR. */
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#define CD1865_MCOR2_CDOD 0x40 /* Detect 1->0 transition of CD. */
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#define CD1865_MCOR2_CTSOD 0x20 /* Detect 1->0 transition of CTS. */
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/*
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* Modem Change Register, read/write (0x12).
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*/
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#define CD1865_MCR_DSRCHG 0x80 /* DSR Changed. */
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#define CD1865_MCR_CDCHG 0x40 /* CD Changed. */
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#define CD1865_MCR_CTSCHG 0x20 /* CTS Changed. */
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/*
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* Modem Signal Value Register, read/write (0x28)
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*
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* Note:
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* These are inverted with respect to the actual signals! If the
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* signal is present, the bit is zero, else the bit is one.
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*/
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#define CD1865_MSVR_DSR 0x80 /* Current state of DSR input. */
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#define CD1865_MSVR_CD 0x40 /* Current state of CD input. */
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#define CD1865_MSVR_CTS 0x20 /* Current state of CTS input. */
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#define CD1865_MSVR_DTR 0x02 /* Current state of DTR output. */
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#define CD1865_MSVR_RTS 0x01 /* Current state of RTS output. */
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#define CD1865_MSVR_OFF 0xe3 /* All signals off. */
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#define CD1865_MSVR_ON 0x00 /* All signals on. */
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/*
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* Escape characters. These are sent in-band when embedded commands are
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* enabled with CD1865_COR2_ETC.
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*/
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#define CD1865_C_ESC 0x00 /* Escape character. */
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#define CD1865_C_SBRK 0x81 /* Start sending BREAK. */
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#define CD1865_C_DELAY 0x82 /* Delay output. */
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#define CD1865_C_EBRK 0x83 /* Stop sending BREAK. */
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#define CD1865_SRSR_RREQint 0x10 /* Receive request interrupt. */
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#define CD1865_SRSR_TREQint 0x04 /* Transmit request interrupt. */
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#define CD1865_SRSR_MREQint 0x01 /* Modem signal change request interrupt.*/
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#define CD1865_SRSR_REQint 0x15 /* All of the above. */
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#define CD1865_SRCR_PKGTYPE 0x80
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#define CD1865_SRCR_REGACKEN 0x40
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#define CD1865_SRCR_DAISYEN 0x20
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#define CD1865_SRCR_GLOBPRI 0x10
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#define CD1865_SRCR_UNFAIR 0x08
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#define CD1865_SRCR_AUTOPRI 0x02
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#define CD1865_SRCR_PRISEL 0x01
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