/*
 *      linux/drivers/char/cd1865.h -- Definitions relating to the CD1865
 *                          for the Specialix IO8+ multiport serial driver.
 *
 *      Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl)
 *      Copyright (C) 1994-1996  Dmitry Gorodchanin (pgmdsg@ibi.com)
 *
 *      Specialix pays for the development and support of this driver.
 *      Please DO contact io8-linux@specialix.co.uk if you require
 *      support.
 *
 *      This driver was developped in the BitWizard linux device
 *      driver service. If you require a linux device driver for your
 *      product, please contact devices@BitWizard.nl for a quote.
 *
 */

/*
 * Definitions for Driving CD180/CD1864/CD1865 based eightport serial cards.
 */


/* Values of choice for Interrupt ACKs */
/* These values are "obligatory" if you use the register based
 * interrupt acknowledgements. See page 99-101 of V2.0 of the CD1865
 * databook */
#define SX_ACK_MINT     0x75    /* goes to PILR1                           */
#define SX_ACK_TINT     0x76    /* goes to PILR2                           */
#define SX_ACK_RINT     0x77    /* goes to PILR3                           */

/* Chip ID (is used when chips ar daisy chained.) */
#define SX_ID           0x10

/* Definitions for Cirrus Logic CL-CD186x 8-port async mux chip */
 
#define CD186x_NCH       8       /* Total number of channels                */
#define CD186x_TPC       16      /* Ticks per character                     */
#define CD186x_NFIFO	 8	 /* TX FIFO size                            */


/* Global registers */

#define CD186x_GIVR      0x40    /* Global Interrupt Vector Register        */
#define CD186x_GICR      0x41    /* Global Interrupting Channel Register    */
#define CD186x_PILR1     0x61    /* Priority Interrupt Level Register 1     */
#define CD186x_PILR2     0x62    /* Priority Interrupt Level Register 2     */
#define CD186x_PILR3     0x63    /* Priority Interrupt Level Register 3     */
#define CD186x_CAR       0x64    /* Channel Access Register                 */
#define CD186x_SRSR      0x65    /* Channel Access Register                 */
#define CD186x_GFRCR     0x6b    /* Global Firmware Revision Code Register  */
#define CD186x_PPRH      0x70    /* Prescaler Period Register High          */
#define CD186x_PPRL      0x71    /* Prescaler Period Register Low           */
#define CD186x_RDR       0x78    /* Receiver Data Register                  */
#define CD186x_RCSR      0x7a    /* Receiver Character Status Register      */
#define CD186x_TDR       0x7b    /* Transmit Data Register                  */
#define CD186x_EOIR      0x7f    /* End of Interrupt Register               */
#define CD186x_MRAR      0x75    /* Modem Request Acknowlege register       */
#define CD186x_TRAR      0x76    /* Transmit Request Acknowlege register    */
#define CD186x_RRAR      0x77    /* Receive Request Acknowlege register     */
#define CD186x_SRCR      0x66    /* Service Request Configuration register  */

/* Channel Registers */

#define CD186x_CCR       0x01    /* Channel Command Register                */
#define CD186x_IER       0x02    /* Interrupt Enable Register               */
#define CD186x_COR1      0x03    /* Channel Option Register 1               */
#define CD186x_COR2      0x04    /* Channel Option Register 2               */
#define CD186x_COR3      0x05    /* Channel Option Register 3               */
#define CD186x_CCSR      0x06    /* Channel Control Status Register         */
#define CD186x_RDCR      0x07    /* Receive Data Count Register             */
#define CD186x_SCHR1     0x09    /* Special Character Register 1            */
#define CD186x_SCHR2     0x0a    /* Special Character Register 2            */
#define CD186x_SCHR3     0x0b    /* Special Character Register 3            */
#define CD186x_SCHR4     0x0c    /* Special Character Register 4            */
#define CD186x_MCOR1     0x10    /* Modem Change Option 1 Register          */
#define CD186x_MCOR2     0x11    /* Modem Change Option 2 Register          */
#define CD186x_MCR       0x12    /* Modem Change Register                   */
#define CD186x_RTPR      0x18    /* Receive Timeout Period Register         */
#define CD186x_MSVR      0x28    /* Modem Signal Value Register             */
#define CD186x_MSVRTS    0x29    /* Modem Signal Value Register             */
#define CD186x_MSVDTR    0x2a    /* Modem Signal Value Register             */
#define CD186x_RBPRH     0x31    /* Receive Baud Rate Period Register High  */
#define CD186x_RBPRL     0x32    /* Receive Baud Rate Period Register Low   */
#define CD186x_TBPRH     0x39    /* Transmit Baud Rate Period Register High */
#define CD186x_TBPRL     0x3a    /* Transmit Baud Rate Period Register Low  */


/* Global Interrupt Vector Register (R/W) */

#define GIVR_ITMASK     0x07     /* Interrupt type mask                     */
#define  GIVR_IT_MODEM   0x01    /* Modem Signal Change Interrupt           */
#define  GIVR_IT_TX      0x02    /* Transmit Data Interrupt                 */
#define  GIVR_IT_RCV     0x03    /* Receive Good Data Interrupt             */
#define  GIVR_IT_REXC    0x07    /* Receive Exception Interrupt             */


/* Global Interrupt Channel Register (R/W) */
 
#define GICR_CHAN       0x1c    /* Channel Number Mask                     */
#define GICR_CHAN_OFF   2       /* Channel Number shift                    */


/* Channel Address Register (R/W) */

#define CAR_CHAN        0x07    /* Channel Number Mask                     */
#define CAR_A7          0x08    /* A7 Address Extension (unused)           */


/* Receive Character Status Register (R/O) */

#define RCSR_TOUT       0x80    /* Rx Timeout                              */
#define RCSR_SCDET      0x70    /* Special Character Detected Mask         */
#define  RCSR_NO_SC      0x00   /* No Special Characters Detected          */
#define  RCSR_SC_1       0x10   /* Special Char 1 (or 1 & 3) Detected      */
#define  RCSR_SC_2       0x20   /* Special Char 2 (or 2 & 4) Detected      */
#define  RCSR_SC_3       0x30   /* Special Char 3 Detected                 */
#define  RCSR_SC_4       0x40   /* Special Char 4 Detected                 */
#define RCSR_BREAK      0x08    /* Break has been detected                 */
#define RCSR_PE         0x04    /* Parity Error                            */
#define RCSR_FE         0x02    /* Frame Error                             */
#define RCSR_OE         0x01    /* Overrun Error                           */


/* Channel Command Register (R/W) (commands in groups can be OR-ed) */

#define CCR_HARDRESET   0x81    /* Reset the chip                          */

#define CCR_SOFTRESET   0x80    /* Soft Channel Reset                      */

#define CCR_CORCHG1     0x42    /* Channel Option Register 1 Changed       */
#define CCR_CORCHG2     0x44    /* Channel Option Register 2 Changed       */
#define CCR_CORCHG3     0x48    /* Channel Option Register 3 Changed       */

#define CCR_SSCH1       0x21    /* Send Special Character 1                */

#define CCR_SSCH2       0x22    /* Send Special Character 2                */

#define CCR_SSCH3       0x23    /* Send Special Character 3                */

#define CCR_SSCH4       0x24    /* Send Special Character 4                */

#define CCR_TXEN        0x18    /* Enable Transmitter                      */
#define CCR_RXEN        0x12    /* Enable Receiver                         */

#define CCR_TXDIS       0x14    /* Disable Transmitter                     */
#define CCR_RXDIS       0x11    /* Disable Receiver                        */


/* Interrupt Enable Register (R/W) */

#define IER_DSR         0x80    /* Enable interrupt on DSR change          */
#define IER_CD          0x40    /* Enable interrupt on CD change           */
#define IER_CTS         0x20    /* Enable interrupt on CTS change          */
#define IER_RXD         0x10    /* Enable interrupt on Receive Data        */
#define IER_RXSC        0x08    /* Enable interrupt on Receive Spec. Char  */
#define IER_TXRDY       0x04    /* Enable interrupt on TX FIFO empty       */
#define IER_TXEMPTY     0x02    /* Enable interrupt on TX completely empty */
#define IER_RET         0x01    /* Enable interrupt on RX Exc. Timeout     */


/* Channel Option Register 1 (R/W) */

#define COR1_ODDP       0x80    /* Odd Parity                              */
#define COR1_PARMODE    0x60    /* Parity Mode mask                        */
#define  COR1_NOPAR      0x00   /* No Parity                               */
#define  COR1_FORCEPAR   0x20   /* Force Parity                            */
#define  COR1_NORMPAR    0x40   /* Normal Parity                           */
#define COR1_IGNORE     0x10    /* Ignore Parity on RX                     */
#define COR1_STOPBITS   0x0c    /* Number of Stop Bits                     */
#define  COR1_1SB        0x00   /* 1 Stop Bit                              */
#define  COR1_15SB       0x04   /* 1.5 Stop Bits                           */
#define  COR1_2SB        0x08   /* 2 Stop Bits                             */
#define COR1_CHARLEN    0x03    /* Character Length                        */
#define  COR1_5BITS      0x00   /* 5 bits                                  */
#define  COR1_6BITS      0x01   /* 6 bits                                  */
#define  COR1_7BITS      0x02   /* 7 bits                                  */
#define  COR1_8BITS      0x03   /* 8 bits                                  */


/* Channel Option Register 2 (R/W) */

#define COR2_IXM        0x80    /* Implied XON mode                        */
#define COR2_TXIBE      0x40    /* Enable In-Band (XON/XOFF) Flow Control  */
#define COR2_ETC        0x20    /* Embedded Tx Commands Enable             */
#define COR2_LLM        0x10    /* Local Loopback Mode                     */
#define COR2_RLM        0x08    /* Remote Loopback Mode                    */
#define COR2_RTSAO      0x04    /* RTS Automatic Output Enable             */
#define COR2_CTSAE      0x02    /* CTS Automatic Enable                    */
#define COR2_DSRAE      0x01    /* DSR Automatic Enable                    */


/* Channel Option Register 3 (R/W) */

#define COR3_XONCH      0x80    /* XON is a pair of characters (1 & 3)     */
#define COR3_XOFFCH     0x40    /* XOFF is a pair of characters (2 & 4)    */
#define COR3_FCT        0x20    /* Flow-Control Transparency Mode          */
#define COR3_SCDE       0x10    /* Special Character Detection Enable      */
#define COR3_RXTH       0x0f    /* RX FIFO Threshold value (1-8)           */


/* Channel Control Status Register (R/O) */

#define CCSR_RXEN       0x80    /* Receiver Enabled                        */
#define CCSR_RXFLOFF    0x40    /* Receive Flow Off (XOFF was sent)        */
#define CCSR_RXFLON     0x20    /* Receive Flow On (XON was sent)          */
#define CCSR_TXEN       0x08    /* Transmitter Enabled                     */
#define CCSR_TXFLOFF    0x04    /* Transmit Flow Off (got XOFF)            */
#define CCSR_TXFLON     0x02    /* Transmit Flow On (got XON)              */


/* Modem Change Option Register 1 (R/W) */

#define MCOR1_DSRZD     0x80    /* Detect 0->1 transition of DSR           */
#define MCOR1_CDZD      0x40    /* Detect 0->1 transition of CD            */
#define MCOR1_CTSZD     0x20    /* Detect 0->1 transition of CTS           */
#define MCOR1_DTRTH     0x0f    /* Auto DTR flow control Threshold (1-8)   */
#define  MCOR1_NODTRFC   0x0     /* Automatic DTR flow control disabled     */


/* Modem Change Option Register 2 (R/W) */

#define MCOR2_DSROD     0x80    /* Detect 1->0 transition of DSR           */
#define MCOR2_CDOD      0x40    /* Detect 1->0 transition of CD            */
#define MCOR2_CTSOD     0x20    /* Detect 1->0 transition of CTS           */

/* Modem Change Register (R/W) */

#define MCR_DSRCHG      0x80    /* DSR Changed                             */
#define MCR_CDCHG       0x40    /* CD Changed                              */
#define MCR_CTSCHG      0x20    /* CTS Changed                             */


/* Modem Signal Value Register (R/W) */

#define MSVR_DSR        0x80    /* Current state of DSR input              */
#define MSVR_CD         0x40    /* Current state of CD input               */
#define MSVR_CTS        0x20    /* Current state of CTS input              */
#define MSVR_DTR        0x02    /* Current state of DTR output             */
#define MSVR_RTS        0x01    /* Current state of RTS output             */


/* Escape characters */

#define CD186x_C_ESC     0x00    /* Escape character                        */
#define CD186x_C_SBRK    0x81    /* Start sending BREAK                     */
#define CD186x_C_DELAY   0x82    /* Delay output                            */
#define CD186x_C_EBRK    0x83    /* Stop sending BREAK                      */

#define SRSR_RREQint     0x10    /* This chip wants "rec" serviced          */
#define SRSR_TREQint     0x04    /* This chip wants "transmit" serviced     */
#define SRSR_MREQint     0x01    /* This chip wants "mdm change" serviced   */



#define SRCR_PKGTYPE    0x80
#define SRCR_REGACKEN   0x40
#define SRCR_DAISYEN    0x20
#define SRCR_GLOBPRI    0x10
#define SRCR_UNFAIR     0x08
#define SRCR_AUTOPRI    0x02
#define SRCR_PRISEL     0x01


