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freebsd-dev/sys/dev/ic/sab82532.h
marcel 4813eca54e The uart(4) driver is an universal driver for various UART hardware. 
It improves on sio(4) in the following areas:
o  Fully newbusified to allow for memory mapped I/O. This is a must
   for ia64 and sparc64,
o  Machine dependent code to take full advantage of machine and firm-
   ware specific ways to define serial consoles and/or debug ports.
o  Hardware abstraction layer to allow the driver to be used with
   various UARTs, such as the well-known ns8250 family of UARTs, the
   Siemens sab82532 or the Zilog Z8530. This is especially important
   for pc98 and sparc64 where it's common to have different UARTs,
o  The notion of system devices to unkludge low-level consoles and
   remote gdb ports and provides the mechanics necessary to support
   the keyboard on sparc64 (which is UART based).
o  The notion of a kernel interface so that a UART can be tied to
   something other than the well-known TTY interface. This is needed
   on sparc64 to present the user with a device and ioctl handling
   suitable for a keyboard, but also allows us to cleanly hide an
   UART when used as a debug port.

Following is a list of features and bugs/flaws specific to the ns8250
family of UARTs as compared to their support in sio(4):
o  The uart(4) driver determines the FIFO size and automaticly takes
   advantages of larger FIFOs and/or additional features. Note that
   since I don't have sufficient access to 16[679]5x UARTs, hardware
   flow control has not been enabled. This is almost trivial to do,
   provided one can test. The downside of this is that broken UARTs
   are more likely to not work correctly with uart(4). The need for
   tunables or knobs may be large enough to warrant their creation.
o  The uart(4) driver does not share the same bumpy history as sio(4)
   and will therefore not provide the necessary hooks, tweaks, quirks
   or work-arounds to deal with once common hardware. To that extend,
   uart(4) supports a subset of the UARTs that sio(4) supports. The
   question before us is whether the subset is sufficient for current
   hardware.
o  There is no support for multiport UARTs in uart(4). The decision
   behind this is that uart(4) deals with one EIA RS232-C interface.
   Packaging of multiple interfaces in a single chip or on a single
   expansion board is beyond the scope of uart(4) and is now mostly
   left for puc(4) to deal with. Lack of hardware made it impossible
   to actually implement such a dependency other than is present for
   the dual channel SAB82532 and Z8350 SCCs.

The current list of missing features is:
o  No configuration capabilities. A set of tunables and sysctls is
   being worked out. There are likely not going to be any or much
   compile-time knobs. Such configuration does not fit well with
   current hardware.
o  No support for the PPS API. This is partly dependent on the
   ability to configure uart(4) and partly dependent on having
   sufficient information to implement it properly.

As usual, the manpage is present but lacks the attention the
software has gotten.
2003-09-06 23:13:47 +00:00

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/* $OpenBSD: sab82532reg.h,v 1.2 2002/04/08 17:49:42 jason Exp $ */
/*
* Copyright (c) 2001 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*
* $FreeBSD$
*/
/*
* Register definitions for SAB82532 based on "Enhanced Serial Communication
* Controller ESCC2 Version 3.2 User's Manual 07.96" from:
* http://www.infineon.com
*/
#define SAB_NCHAN 2 /* number of channels */
#define SAB_CHANLEN 0x40 /* length of channel register set */
#define SAB_CHAN_A 0x00 /* channel A register offset */
#define SAB_CHAN_B 0x40 /* channel B register offset */
#define SAB_RFIFO 0x00 /* r: rx fifo */
#define SAB_XFIFO 0x00 /* w: tx fifo */
#define SAB_STAR 0x20 /* r: status register */
#define SAB_CMDR 0x20 /* w: command register */
#define SAB_MODE 0x22 /* rw: mode register */
#define SAB_TIMR 0x23 /* rw: timer register */
#define SAB_XON 0x24 /* rw: xon character */
#define SAB_XOFF 0x25 /* rw: xoff character */
#define SAB_TCR 0x26 /* rw: termination character */
#define SAB_DAFO 0x27 /* rw: data format */
#define SAB_RFC 0x28 /* rw: rfifo control register */
#define SAB_RBCL 0x2a /* r: rx byte count low */
#define SAB_TBCL 0x2a /* w: tx byte count low */
#define SAB_RBCH 0x2b /* r: rx byte count high */
#define SAB_XBCH 0x2b /* w: tx byte count high */
#define SAB_CCR0 0x2c /* rw: channel configuration register 0 */
#define SAB_CCR1 0x2d /* rw: channel configuration register 1 */
#define SAB_CCR2 0x2e /* rw: channel configuration register 2 */
#define SAB_CCR3 0x2f /* rw: channel configuration register 3 */
#define SAB_TSAX 0x30 /* w: time-slot assignment register tx */
#define SAB_TSAR 0x31 /* w: time-slot assignment register rx */
#define SAB_XCCR 0x32 /* w: tx channel capacity register */
#define SAB_RCCR 0x33 /* w: receive channel capacity register */
#define SAB_VSTR 0x34 /* r: version status */
#define SAB_BGR 0x34 /* w: baud rate generator */
#define SAB_TIC 0x35 /* w: transmit immediate character */
#define SAB_MXN 0x36 /* w: mask xon character */
#define SAB_MXF 0x37 /* w: mask xoff character */
#define SAB_GIS 0x38 /* r: global interrupt status */
#define SAB_IVA 0x38 /* w: interrupt vector address */
#define SAB_IPC 0x39 /* rw: interrupt port configuration */
#define SAB_ISR0 0x3a /* r: interrupt status 0 */
#define SAB_IMR0 0x3a /* w: interrupt mask 0 */
#define SAB_ISR1 0x3b /* r: interrupt status 1 */
#define SAB_IMR1 0x3b /* w: interrupt mask 1 */
#define SAB_PVR 0x3c /* rw: port value register */
#define SAB_PIS 0x3d /* r: port interrupt status */
#define SAB_PIM 0x3d /* w: port interrupt mask */
#define SAB_PCR 0x3e /* w: port configuration register */
#define SAB_CCR4 0x3f /* rw: channel configuration register 4 */
/* SAB_STAR: status register */
#define SAB_STAR_XDOV 0x80 /* transmit data overflow */
#define SAB_STAR_XFW 0x40 /* transmit fifo write enable */
#define SAB_STAR_RFNE 0x20 /* rfifo not empty */
#define SAB_STAR_FCS 0x10 /* flow control status */
#define SAB_STAR_TEC 0x08 /* tx immediate char is executing */
#define SAB_STAR_CEC 0x04 /* command is executing */
#define SAB_STAR_CTS 0x02 /* cts status: 0:inactive/high,1:active/low */
/* SAB_CMDR: command register */
#define SAB_CMDR_RMC 0x80 /* receive message complete */
#define SAB_CMDR_RRES 0x40 /* receiver reset */
#define SAB_CMDR_RFRD 0x20 /* receive fifo read enable */
#define SAB_CMDR_STI 0x10 /* start timer */
#define SAB_CMDR_XF 0x08 /* transmit frame */
#define SAB_CMDR_XRES 0x01 /* transmit reset */
/* SAB_MODE: mode register */
#define SAB_MODE_FRTS 0x40 /* flow control using rts */
#define SAB_MODE_FCTS 0x20 /* flow control using cts */
#define SAB_MODE_FLON 0x10 /* flow control on */
#define SAB_MODE_RAC 0x08 /* receiver active */
#define SAB_MODE_RTS 0x04 /* request to send */
#define SAB_MODE_TRS 0x02 /* timer resolution */
#define SAB_MODE_TLP 0x01 /* test loop */
/* SAB_TIMR: timer register */
#define SAB_TIMR_CNT 0xe0 /* count mask */
#define SAB_TIMR_VAL 0x1f /* value mask */
/* SAB_DAFO: data format */
#define SAB_DAFO_XBRK 0x40 /* transmit break */
#define SAB_DAFO_STOP 0x20 /* stop bit: 0:1 bit, 1:2 bits */
#define SAB_DAFO_PAR1 0x10 /* parity 1, see below */
#define SAB_DAFO_PAR0 0x08 /* parity 0, see below */
#define SAB_DAFO_PARE 0x04 /* parity enable */
#define SAB_DAFO_CHL1 0x02 /* character length 1, see below */
#define SAB_DAFO_CHL0 0x01 /* character length 0, see below */
#define SAB_DAFO_CHL_CSIZE (SAB_DAFO_CHL1|SAB_DAFO_CHL0)
#define SAB_DAFO_CHL_CS5 (SAB_DAFO_CHL1|SAB_DAFO_CHL0)
#define SAB_DAFO_CHL_CS6 (SAB_DAFO_CHL1)
#define SAB_DAFO_CHL_CS7 (SAB_DAFO_CHL0)
#define SAB_DAFO_CHL_CS8 (0)
#define SAB_DAFO_PARMASK (SAB_DAFO_PAR1|SAB_DAFO_PAR0|SAB_DAFO_PARE)
#define SAB_DAFO_PAR_MARK (SAB_DAFO_PAR1|SAB_DAFO_PAR0|SAB_DAFO_PARE)
#define SAB_DAFO_PAR_EVEN (SAB_DAFO_PAR1|SAB_DAFO_PARE)
#define SAB_DAFO_PAR_ODD (SAB_DAFO_PAR0|SAB_DAFO_PARE)
#define SAB_DAFO_PAR_SPACE (SAB_DAFO_PARE)
#define SAB_DAFO_PAR_NONE (0)
/* SAB_RFC: rfifo control register */
#define SAB_RFC_DPS 0x40 /* disable parity storage */
#define SAB_RFC_DXS 0x20 /* disable storage of xon/xoff characters */
#define SAB_RFC_RFDF 0x10 /* rfifo data format: 0 data,1 data+stat */
#define SAB_RFC_RFTH1 0x08 /* rfifo threshold level 1, see below */
#define SAB_RFC_RFTH0 0x04 /* rfifo threshold level 0, see below */
#define SAB_RFC_TCDE 0x01 /* termination character detection enable */
#define SAB_RFC_RFTH_MASK (SAB_RFC_RFTH1|SAB_RFC_RFTH0)
#define SAB_RFC_RFTH_32CHAR (SAB_RFC_RFTH1|SAB_RFC_RFTH0)
#define SAB_RFC_RFTH_16CHAR (SAB_RFC_RFTH1)
#define SAB_RFC_RFTH_4CHAR (SAB_RFC_RFTH0)
#define SAB_RFC_RFTH_1CHAR (0)
/* SAB_RBCH: received byte count high */
#define SAB_RBCH_DMA 0x80 /* read back of XBCH DMA bit */
#define SAB_RBCH_CAS 0x20 /* read back of XBCH CAS bit */
#define SAB_RBCH_CNT 0x0f /* ms 4 bits of rx byte count (not used) */
/* SAB_XBCH: transmit byte count high */
#define SAB_XBCH_DMA 0x80 /* dma mode: 1:dma, 0:interrupt */
#define SAB_XBCH_CAS 0x20 /* carrier detect auto-start */
#define SAB_XBCH_XC 0x10 /* transmit continuously */
#define SAB_XBCH_CNT 0x0f /* ms 4 bits of tx byte count */
/* SAB_CCR0: channel configuration register 0 */
#define SAB_CCR0_PU 0x80 /* 0:power-down, 1:power-up */
#define SAB_CCR0_MCE 0x40 /* master clock enable */
#define SAB_CCR0_SC2 0x10 /* serial port config 2, see below */
#define SAB_CCR0_SC1 0x08 /* serial port config 1, see below */
#define SAB_CCR0_SC0 0x04 /* serial port config 0, see below */
#define SAB_CCR0_SM1 0x02 /* serial mode 1, see below */
#define SAB_CCR0_SM0 0x01 /* serial mode 0, see below */
#define SAB_CCR0_SC_MASK (SAB_CCR0_SC2|SAB_CCR0_SC1|SAB_CCR0_SC0)
#define SAB_CCR0_SC_NRZ (0)
#define SAB_CCR0_SC_NRZI (SAB_CCR0_SC1)
#define SAB_CCR0_SC_FM0 (SAB_CCR0_SC2)
#define SAB_CCR0_SC_FM1 (SAB_CCR0_SC2|SAB_CCR0_SC0)
#define SAB_CCR0_SC_MANCHESTER (SAB_CCR0_SC2|SAB_CCR0_SC1)
#define SAB_CCR0_SM_MASK (SAB_CCR0_SM1|SAB_CCR0_SM0)
#define SAB_CCR0_SM_DLC (0)
#define SAB_CCR0_SM_DLCLOOP (SAB_CCR0_SM0)
#define SAB_CCR0_SM_BISYNC (SAB_CCR0_SM1)
#define SAB_CCR0_SM_ASYNC (SAB_CCR0_SM1|SAB_CCR0_SM0)
/* SAB_CCR1: channel configuration register 1 */
#define SAB_CCR1_ODS 0x10 /* Output driver select:1:pushpull,0:odrain */
#define SAB_CCR1_BCR 0x08 /* bit clock rate: 1:async, 0:isochronous */
#define SAB_CCR1_CM2 0x04 /* clock mode 2, see below */
#define SAB_CCR1_CM1 0x02 /* clock mode 1, see below */
#define SAB_CCR1_CM0 0x01 /* clock mode 0, see below */
#define SAB_CCR1_CM_MASK (SAB_CCR1_CM2|SAB_CCR1_CM1|SAB_CCR1_CM0)
#define SAB_CCR1_CM_7 (SAB_CCR1_CM2|SAB_CCR1_CM1|SAB_CCR1_CM0)
/* SAB_CCR2: channel configuration register 2, depends on clock mode above */
/* clock mode 0a, 1, 4, 5 */
#define SAB_CCR2_SOC1 0x80 /* special output 1, below */
#define SAB_CCR2_SOC0 0x40 /* special output 0, below */
#define SAB_CCR2_SOC_MASK (SAB_CCR2_SOC1|SAB_CCR2_SOC0)
#define SAB_CCR2_SOC_RTSHIGH (SAB_CCR2_SOC1)
#define SAB_CCR2_SOC_RTSNORM (0)
#define SAB_CCR2_SOC_RTSRX (SAB_CCR2_SOC1|SAB_CCR2_SOC0)
/* clock mode 0b, 2, 3, 6, 7 */
#define SAB_CCR2_BR9 0x80 /* baud rate bit 9 */
#define SAB_CCR2_BR8 0x40 /* baud rate bit 8 */
#define SAB_CCR2_BDF 0x20 /* baud rate division factor: 0:1: 1:BRG */
#define SAB_CCR2_SSEL 0x10 /* clock source select */
/* clock mode 5 */
#define SAB_CCR2_XCS0 0x20 /* tx clock shift, bit 0 */
#define SAB_CCR2_RCS0 0x10 /* rx clock shift, bit 0 */
/* clock mode 0b, 2, 3, 4, 5, 6, 7 */
#define SAB_CCR2_TOE 0x08 /* tx clock output enable */
/* clock mode 0a, 0b, 1, 2, 3, 4, 5, 6, 7 */
#define SAB_CCR2_RWX 0x04 /* read/write exchange (dma mode only) */
#define SAB_CCR2_DIV 0x01 /* data inversion (nrz) */
/* SAB_CCR3: channel configuration register 3 (v2 or greater) */
#define SAB_CCR3_PSD 0x01 /* dpll phase shift disable (nrz/nrzi) */
/* SAB_TSAX: time-slot assignment register transmit (clock mode 5 only) */
#define SAB_TSAX_TSNX 0xfc /* time-slot number transmit */
#define SAB_TSAX_XCS2 0x02 /* transmit clock shift bit 2 */
#define SAB_TSAX_XCS1 0x01 /* transmit clock shift bit 1 */
/* SAB_TSAR: time-slot assignment register receive (clock mode 5 only) */
#define SAB_TSAR_TSNR 0xfc /* time-slot number receive */
#define SAB_TSAR_RCS2 0x02 /* receive clock shift bit 2 */
#define SAB_TSAR_RCS1 0x01 /* receive clock shift bit 1 */
/* SAB_VSTR: version status register */
#define SAB_VSTR_CD 0x80 /* carrier detect status */
#define SAB_VSTR_DPLA 0x40 /* dpll asynchronous */
#define SAB_VSTR_VMASK 0x0f /* chip version mask: */
#define SAB_VSTR_V_1 0x00 /* version 1 */
#define SAB_VSTR_V_2 0x01 /* version 2 */
#define SAB_VSTR_V_32 0x02 /* version 3.2 */
/* SAB_GIS: global interrupt status register */
#define SAB_GIS_PI 0x80 /* universal port interrupt */
#define SAB_GIS_ISA1 0x08 /* interrupt status a1 */
#define SAB_GIS_ISA0 0x04 /* interrupt status a0 */
#define SAB_GIS_ISB1 0x02 /* interrupt status b1 */
#define SAB_GIS_ISB0 0x01 /* interrupt status b0 */
/* SAB_IVA: interrupt vector address */
#define SAB_IVA_MASK 0xf8 /* interrupt vector address mask */
/* SAB_IPC: interrupt port configuration */
#define SAB_IPC_VIS 0x80 /* masked interrupt bits visible */
#define SAB_IPC_SLAMASK 0x18 /* slave address mask */
#define SAB_IPC_CASM 0x04 /* cascading mode */
#define SAB_IPC_ICMASK 0x03 /* port config mask: */
#define SAB_IPC_ICOD 0x00 /* open drain output */
#define SAB_IPC_ICPL 0x01 /* push/pull active low output */
#define SAB_IPC_ICPH 0x03 /* push/pull active high output */
/* SAB_ISR0: interrupt status 0 */
#define SAB_ISR0_TCD 0x80 /* termination character detected */
#define SAB_ISR0_TIME 0x40 /* time-out limit exceeded */
#define SAB_ISR0_PERR 0x20 /* parity error */
#define SAB_ISR0_FERR 0x10 /* framing error */
#define SAB_ISR0_PLLA 0x08 /* dpll asynchronous */
#define SAB_ISR0_CDSC 0x04 /* carrier detect status change */
#define SAB_ISR0_RFO 0x02 /* rfifo overflow */
#define SAB_ISR0_RPF 0x01 /* receive pool full */
/* SAB_ISR1: interrupt status 1 */
#define SAB_ISR1_BRK 0x80 /* break detected */
#define SAB_ISR1_BRKT 0x40 /* break terminated */
#define SAB_ISR1_ALLS 0x20 /* all sent */
#define SAB_ISR1_XOFF 0x10 /* xoff detected */
#define SAB_ISR1_TIN 0x08 /* timer interrupt */
#define SAB_ISR1_CSC 0x04 /* clear to send status change */
#define SAB_ISR1_XON 0x02 /* xon detected */
#define SAB_ISR1_XPR 0x01 /* transmit pool ready */
/* SAB_IMR0: interrupt mask 0 */
#define SAB_IMR0_TCD 0x80 /* termination character detected */
#define SAB_IMR0_TIME 0x40 /* time-out limit exceeded */
#define SAB_IMR0_PERR 0x20 /* parity error */
#define SAB_IMR0_FERR 0x10 /* framing error */
#define SAB_IMR0_PLLA 0x08 /* dpll asynchronous */
#define SAB_IMR0_CDSC 0x04 /* carrier detect status change */
#define SAB_IMR0_RFO 0x02 /* rfifo overflow */
#define SAB_IMR0_RPF 0x01 /* receive pool full */
/* SAB_ISR1: interrupt mask 1 */
#define SAB_IMR1_BRK 0x80 /* break detected */
#define SAB_IMR1_BRKT 0x40 /* break terminated */
#define SAB_IMR1_ALLS 0x20 /* all sent */
#define SAB_IMR1_XDU 0x10 /* xoff detected */
#define SAB_IMR1_TIN 0x08 /* timer interrupt */
#define SAB_IMR1_CSC 0x04 /* clear to send status change */
#define SAB_IMR1_XMR 0x02 /* xon detected */
#define SAB_IMR1_XPR 0x01 /* transmit pool ready */
/* SAB_PVR: port value register */
#define SAB_PVR_DSR_A 0x01 /* port A DSR */
#define SAB_PVR_DTR_A 0x02 /* port A DTR */
#define SAB_PVR_DTR_B 0x04 /* port B DTR */
#define SAB_PVR_DSR_B 0x08 /* port B DSR */
#define SAB_PVR_MAGIC 0x10 /* dunno... */
/* SAB_CCR4: channel configuration register 4 */
#define SAB_CCR4_MCK4 0x80 /* master clock divide by 4 */
#define SAB_CCR4_EBRG 0x40 /* enhanced baud rate generator mode */
#define SAB_CCR4_TST1 0x20 /* test pin */
#define SAB_CCR4_ICD 0x10 /* invert polarity of carrier detect */
/* Receive status byte */
#define SAB_RSTAT_PE 0x80 /* parity error */
#define SAB_RSTAT_FE 0x40 /* framing error */
#define SAB_RSTAT_PAR 0x01 /* parity bit */
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