sys/bus/u4b/serial/uftdi_reg.h

   1 /*      $NetBSD: uftdireg.h,v 1.6 2002/07/11 21:14:28 augustss Exp $ */
   2 /*      $FreeBSD$       */
   3
   4 /*
   5  * Definitions for the FTDI USB Single Port Serial Converter -
   6  * known as FTDI_SIO (Serial Input/Output application of the chipset)
   7  *
   8  * The device is based on the FTDI FT8U100AX chip. It has a DB25 on one side,
   9  * USB on the other.
  10  *
  11  * Thanx to FTDI (http://www.ftdi.co.uk) for so kindly providing details
  12  * of the protocol required to talk to the device and ongoing assistence
  13  * during development.
  14  *
  15  * Bill Ryder - bryder@sgi.com of Silicon Graphics, Inc. is the original
  16  * author of this file.
  17  */
  18 /* Modified by Lennart Augustsson */
  19
  20 /* Vendor Request Interface */
  21 #define FTDI_SIO_RESET          0       /* Reset the port */
  22 #define FTDI_SIO_MODEM_CTRL     1       /* Set the modem control register */
  23 #define FTDI_SIO_SET_FLOW_CTRL  2       /* Set flow control register */
  24 #define FTDI_SIO_SET_BAUD_RATE  3       /* Set baud rate */
  25 #define FTDI_SIO_SET_DATA       4       /* Set the data characteristics of the
  26                                          * port */
  27 #define FTDI_SIO_GET_STATUS     5       /* Retrieve current value of status
  28                                          * reg */
  29 #define FTDI_SIO_SET_EVENT_CHAR 6       /* Set the event character */
  30 #define FTDI_SIO_SET_ERROR_CHAR 7       /* Set the error character */
  31
  32 /* Port Identifier Table */
  33 #define FTDI_PIT_DEFAULT        0       /* SIOA */
  34 #define FTDI_PIT_SIOA           1       /* SIOA */
  35 #define FTDI_PIT_SIOB           2       /* SIOB */
  36 #define FTDI_PIT_PARALLEL       3       /* Parallel */
  37
  38 enum uftdi_type {
  39         UFTDI_TYPE_SIO,
  40         UFTDI_TYPE_8U232AM
  41 };
  42
  43 /*
  44  * BmRequestType:  0100 0000B
  45  * bRequest:       FTDI_SIO_RESET
  46  * wValue:         Control Value
  47  *                   0 = Reset SIO
  48  *                   1 = Purge RX buffer
  49  *                   2 = Purge TX buffer
  50  * wIndex:         Port
  51  * wLength:        0
  52  * Data:           None
  53  *
  54  * The Reset SIO command has this effect:
  55  *
  56  *    Sets flow control set to 'none'
  57  *    Event char = 0x0d
  58  *    Event trigger = disabled
  59  *    Purge RX buffer
  60  *    Purge TX buffer
  61  *    Clear DTR
  62  *    Clear RTS
  63  *    baud and data format not reset
  64  *
  65  * The Purge RX and TX buffer commands affect nothing except the buffers
  66  */
  67 /* FTDI_SIO_RESET */
  68 #define FTDI_SIO_RESET_SIO 0
  69 #define FTDI_SIO_RESET_PURGE_RX 1
  70 #define FTDI_SIO_RESET_PURGE_TX 2
  71
  72 /*
  73  * BmRequestType:  0100 0000B
  74  * bRequest:       FTDI_SIO_SET_BAUDRATE
  75  * wValue:         BaudRate value - see below
  76  * wIndex:         Port
  77  * wLength:        0
  78  * Data:           None
  79  */
  80 /* FTDI_SIO_SET_BAUDRATE */
  81 enum {
  82         ftdi_sio_b300 = 0,
  83         ftdi_sio_b600 = 1,
  84         ftdi_sio_b1200 = 2,
  85         ftdi_sio_b2400 = 3,
  86         ftdi_sio_b4800 = 4,
  87         ftdi_sio_b9600 = 5,
  88         ftdi_sio_b19200 = 6,
  89         ftdi_sio_b38400 = 7,
  90         ftdi_sio_b57600 = 8,
  91         ftdi_sio_b115200 = 9
  92 };
  93
  94 #define FTDI_8U232AM_FREQ 3000000
  95
  96 /* Bounds for normal divisors as 4-bit fixed precision ints. */
  97 #define FTDI_8U232AM_MIN_DIV 0x20
  98 #define FTDI_8U232AM_MAX_DIV 0x3fff8
  99
 100 /*
 101  * BmRequestType:  0100 0000B
 102  * bRequest:       FTDI_SIO_SET_DATA
 103  * wValue:         Data characteristics (see below)
 104  * wIndex:         Port
 105  * wLength:        0
 106  * Data:           No
 107  *
 108  * Data characteristics
 109  *
 110  *   B0..7   Number of data bits
 111  *   B8..10  Parity
 112  *           0 = None
 113  *           1 = Odd
 114  *           2 = Even
 115  *           3 = Mark
 116  *           4 = Space
 117  *   B11..13 Stop Bits
 118  *           0 = 1
 119  *           1 = 1.5
 120  *           2 = 2
 121  *   B14..15 Reserved
 122  *
 123  */
 124 /* FTDI_SIO_SET_DATA */
 125 #define FTDI_SIO_SET_DATA_BITS(n) (n)
 126 #define FTDI_SIO_SET_DATA_PARITY_NONE (0x0 << 8)
 127 #define FTDI_SIO_SET_DATA_PARITY_ODD (0x1 << 8)
 128 #define FTDI_SIO_SET_DATA_PARITY_EVEN (0x2 << 8)
 129 #define FTDI_SIO_SET_DATA_PARITY_MARK (0x3 << 8)
 130 #define FTDI_SIO_SET_DATA_PARITY_SPACE (0x4 << 8)
 131 #define FTDI_SIO_SET_DATA_STOP_BITS_1 (0x0 << 11)
 132 #define FTDI_SIO_SET_DATA_STOP_BITS_15 (0x1 << 11)
 133 #define FTDI_SIO_SET_DATA_STOP_BITS_2 (0x2 << 11)
 134 #define FTDI_SIO_SET_BREAK (0x1 << 14)
 135
 136 /*
 137  * BmRequestType:   0100 0000B
 138  * bRequest:        FTDI_SIO_MODEM_CTRL
 139  * wValue:          ControlValue (see below)
 140  * wIndex:          Port
 141  * wLength:         0
 142  * Data:            None
 143  *
 144  * NOTE: If the device is in RTS/CTS flow control, the RTS set by this
 145  * command will be IGNORED without an error being returned
 146  * Also - you can not set DTR and RTS with one control message
 147  *
 148  * ControlValue
 149  * B0    DTR state
 150  *          0 = reset
 151  *          1 = set
 152  * B1    RTS state
 153  *          0 = reset
 154  *          1 = set
 155  * B2..7 Reserved
 156  * B8    DTR state enable
 157  *          0 = ignore
 158  *          1 = use DTR state
 159  * B9    RTS state enable
 160  *          0 = ignore
 161  *          1 = use RTS state
 162  * B10..15 Reserved
 163  */
 164 /* FTDI_SIO_MODEM_CTRL */
 165 #define FTDI_SIO_SET_DTR_MASK 0x1
 166 #define FTDI_SIO_SET_DTR_HIGH (1 | ( FTDI_SIO_SET_DTR_MASK  << 8))
 167 #define FTDI_SIO_SET_DTR_LOW  (0 | ( FTDI_SIO_SET_DTR_MASK  << 8))
 168 #define FTDI_SIO_SET_RTS_MASK 0x2
 169 #define FTDI_SIO_SET_RTS_HIGH (2 | ( FTDI_SIO_SET_RTS_MASK << 8))
 170 #define FTDI_SIO_SET_RTS_LOW (0 | ( FTDI_SIO_SET_RTS_MASK << 8))
 171
 172 /*
 173  *   BmRequestType:  0100 0000b
 174  *   bRequest:       FTDI_SIO_SET_FLOW_CTRL
 175  *   wValue:         Xoff/Xon
 176  *   wIndex:         Protocol/Port - hIndex is protocl / lIndex is port
 177  *   wLength:        0
 178  *   Data:           None
 179  *
 180  * hIndex protocol is:
 181  *   B0 Output handshaking using RTS/CTS
 182  *       0 = disabled
 183  *       1 = enabled
 184  *   B1 Output handshaking using DTR/DSR
 185  *       0 = disabled
 186  *       1 = enabled
 187  *   B2 Xon/Xoff handshaking
 188  *       0 = disabled
 189  *       1 = enabled
 190  *
 191  * A value of zero in the hIndex field disables handshaking
 192  *
 193  * If Xon/Xoff handshaking is specified, the hValue field should contain the
 194  * XOFF character and the lValue field contains the XON character.
 195  */
 196 /* FTDI_SIO_SET_FLOW_CTRL */
 197 #define FTDI_SIO_DISABLE_FLOW_CTRL 0x0
 198 #define FTDI_SIO_RTS_CTS_HS 0x1
 199 #define FTDI_SIO_DTR_DSR_HS 0x2
 200 #define FTDI_SIO_XON_XOFF_HS 0x4
 201
 202 /*
 203  *  BmRequestType:   0100 0000b
 204  *  bRequest:        FTDI_SIO_SET_EVENT_CHAR
 205  *  wValue:          Event Char
 206  *  wIndex:          Port
 207  *  wLength:         0
 208  *  Data:            None
 209  *
 210  * wValue:
 211  *   B0..7   Event Character
 212  *   B8      Event Character Processing
 213  *             0 = disabled
 214  *             1 = enabled
 215  *   B9..15  Reserved
 216  *
 217  * FTDI_SIO_SET_EVENT_CHAR
 218  *
 219  * Set the special event character for the specified communications port.
 220  * If the device sees this character it will immediately return the
 221  * data read so far - rather than wait 40ms or until 62 bytes are read
 222  * which is what normally happens.
 223  */
 224
 225 /*
 226  *  BmRequestType:  0100 0000b
 227  *  bRequest:       FTDI_SIO_SET_ERROR_CHAR
 228  *  wValue:         Error Char
 229  *  wIndex:         Port
 230  *  wLength:        0
 231  *  Data:           None
 232  *
 233  *  Error Char
 234  *  B0..7  Error Character
 235  *  B8     Error Character Processing
 236  *           0 = disabled
 237  *           1 = enabled
 238  *  B9..15 Reserved
 239  *
 240  * FTDI_SIO_SET_ERROR_CHAR
 241  * Set the parity error replacement character for the specified communications
 242  * port.
 243  */
 244
 245 /*
 246  *   BmRequestType:   1100 0000b
 247  *   bRequest:        FTDI_SIO_GET_MODEM_STATUS
 248  *   wValue:          zero
 249  *   wIndex:          Port
 250  *   wLength:         1
 251  *   Data:            Status
 252  *
 253  * One byte of data is returned
 254  * B0..3 0
 255  * B4    CTS
 256  *         0 = inactive
 257  *         1 = active
 258  * B5    DSR
 259  *         0 = inactive
 260  *         1 = active
 261  * B6    Ring Indicator (RI)
 262  *         0 = inactive
 263  *         1 = active
 264  * B7    Receive Line Signal Detect (RLSD)
 265  *         0 = inactive
 266  *         1 = active
 267  *
 268  * FTDI_SIO_GET_MODEM_STATUS
 269  * Retrieve the current value of the modem status register.
 270  */
 271 #define FTDI_SIO_CTS_MASK 0x10
 272 #define FTDI_SIO_DSR_MASK 0x20
 273 #define FTDI_SIO_RI_MASK  0x40
 274 #define FTDI_SIO_RLSD_MASK 0x80
 275
 276 /*
 277  * DATA FORMAT
 278  *
 279  * IN Endpoint
 280  *
 281  * The device reserves the first two bytes of data on this endpoint to contain
 282  * the current values of the modem and line status registers. In the absence of
 283  * data, the device generates a message consisting of these two status bytes
 284  * every 40 ms.
 285  *
 286  * Byte 0: Modem Status
 287  *   NOTE: 4 upper bits have same layout as the MSR register in a 16550
 288  *
 289  * Offset       Description
 290  * B0..3        Port
 291  * B4           Clear to Send (CTS)
 292  * B5           Data Set Ready (DSR)
 293  * B6           Ring Indicator (RI)
 294  * B7           Receive Line Signal Detect (RLSD)
 295  *
 296  * Byte 1: Line Status
 297  *   NOTE: same layout as the LSR register in a 16550
 298  *
 299  * Offset       Description
 300  * B0   Data Ready (DR)
 301  * B1   Overrun Error (OE)
 302  * B2   Parity Error (PE)
 303  * B3   Framing Error (FE)
 304  * B4   Break Interrupt (BI)
 305  * B5   Transmitter Holding Register (THRE)
 306  * B6   Transmitter Empty (TEMT)
 307  * B7   Error in RCVR FIFO
 308  *
 309  * OUT Endpoint
 310  *
 311  * This device reserves the first bytes of data on this endpoint contain the
 312  * length and port identifier of the message. For the FTDI USB Serial converter
 313  * the port identifier is always 1.
 314  *
 315  * Byte 0: Port & length
 316  *
 317  * Offset       Description
 318  * B0..1        Port
 319  * B2..7        Length of message - (not including Byte 0)
 320  */
 321 #define FTDI_PORT_MASK 0x0f
 322 #define FTDI_MSR_MASK 0xf0
 323 #define FTDI_GET_MSR(p) (((p)[0]) & FTDI_MSR_MASK)
 324 #define FTDI_GET_LSR(p) ((p)[1])
 325 #define FTDI_LSR_MASK (~0x60)           /* interesting bits */
 326 #define FTDI_OUT_TAG(len, port) (((len) << 2) | (port))