drivers/tty/serial/max3107.h

   1 /*
   2  * max3107.h - spi uart protocol driver header for Maxim 3107
   3  *
   4  * Copyright (C) Aavamobile 2009
   5  * Based on serial_max3100.h by Christian Pellegrin
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  */
  12
  13 #ifndef _MAX3107_H
  14 #define _MAX3107_H
  15
  16 /* Serial error status definitions */
  17 #define MAX3107_PARITY_ERROR    1
  18 #define MAX3107_FRAME_ERROR     2
  19 #define MAX3107_OVERRUN_ERROR   4
  20 #define MAX3107_ALL_ERRORS      (MAX3107_PARITY_ERROR | \
  21                                  MAX3107_FRAME_ERROR | \
  22                                  MAX3107_OVERRUN_ERROR)
  23
  24 /* GPIO definitions */
  25 #define MAX3107_GPIO_BASE       88
  26 #define MAX3107_GPIO_COUNT      4
  27
  28
  29 /* GPIO connected to chip's reset pin */
  30 #define MAX3107_RESET_GPIO      87
  31
  32
  33 /* Chip reset delay */
  34 #define MAX3107_RESET_DELAY     10
  35
  36 /* Chip wakeup delay */
  37 #define MAX3107_WAKEUP_DELAY    50
  38
  39
  40 /* Sleep mode definitions */
  41 #define MAX3107_DISABLE_FORCED_SLEEP    0
  42 #define MAX3107_ENABLE_FORCED_SLEEP     1
  43 #define MAX3107_DISABLE_AUTOSLEEP       2
  44 #define MAX3107_ENABLE_AUTOSLEEP        3
  45
  46
  47 /* Definitions for register access with SPI transfers
  48  *
  49  * SPI transfer format:
  50  *
  51  * Master to slave bits xzzzzzzzyyyyyyyy
  52  * Slave to master bits aaaaaaaabbbbbbbb
  53  *
  54  * where:
  55  * x = 0 for reads, 1 for writes
  56  * z = register address
  57  * y = new register value if write, 0 if read
  58  * a = unspecified
  59  * b = register value if read, unspecified if write
  60  */
  61
  62 /* SPI speed */
  63 #define MAX3107_SPI_SPEED       (3125000 * 2)
  64
  65 /* Write bit */
  66 #define MAX3107_WRITE_BIT       (1 << 15)
  67
  68 /* SPI TX data mask */
  69 #define MAX3107_SPI_RX_DATA_MASK        (0x00ff)
  70
  71 /* SPI RX data mask */
  72 #define MAX3107_SPI_TX_DATA_MASK        (0x00ff)
  73
  74 /* Register access masks */
  75 #define MAX3107_RHR_REG                 (0x0000) /* RX FIFO */
  76 #define MAX3107_THR_REG                 (0x0000) /* TX FIFO */
  77 #define MAX3107_IRQEN_REG               (0x0100) /* IRQ enable */
  78 #define MAX3107_IRQSTS_REG              (0x0200) /* IRQ status */
  79 #define MAX3107_LSR_IRQEN_REG           (0x0300) /* LSR IRQ enable */
  80 #define MAX3107_LSR_IRQSTS_REG          (0x0400) /* LSR IRQ status */
  81 #define MAX3107_SPCHR_IRQEN_REG         (0x0500) /* Special char IRQ enable */
  82 #define MAX3107_SPCHR_IRQSTS_REG        (0x0600) /* Special char IRQ status */
  83 #define MAX3107_STS_IRQEN_REG           (0x0700) /* Status IRQ enable */
  84 #define MAX3107_STS_IRQSTS_REG          (0x0800) /* Status IRQ status */
  85 #define MAX3107_MODE1_REG               (0x0900) /* MODE1 */
  86 #define MAX3107_MODE2_REG               (0x0a00) /* MODE2 */
  87 #define MAX3107_LCR_REG                 (0x0b00) /* LCR */
  88 #define MAX3107_RXTO_REG                (0x0c00) /* RX timeout */
  89 #define MAX3107_HDPIXDELAY_REG          (0x0d00) /* Auto transceiver delays */
  90 #define MAX3107_IRDA_REG                (0x0e00) /* IRDA settings */
  91 #define MAX3107_FLOWLVL_REG             (0x0f00) /* Flow control levels */
  92 #define MAX3107_FIFOTRIGLVL_REG         (0x1000) /* FIFO IRQ trigger levels */
  93 #define MAX3107_TXFIFOLVL_REG           (0x1100) /* TX FIFO level */
  94 #define MAX3107_RXFIFOLVL_REG           (0x1200) /* RX FIFO level */
  95 #define MAX3107_FLOWCTRL_REG            (0x1300) /* Flow control */
  96 #define MAX3107_XON1_REG                (0x1400) /* XON1 character */
  97 #define MAX3107_XON2_REG                (0x1500) /* XON2 character */
  98 #define MAX3107_XOFF1_REG               (0x1600) /* XOFF1 character */
  99 #define MAX3107_XOFF2_REG               (0x1700) /* XOFF2 character */
 100 #define MAX3107_GPIOCFG_REG             (0x1800) /* GPIO config */
 101 #define MAX3107_GPIODATA_REG            (0x1900) /* GPIO data */
 102 #define MAX3107_PLLCFG_REG              (0x1a00) /* PLL config */
 103 #define MAX3107_BRGCFG_REG              (0x1b00) /* Baud rate generator conf */
 104 #define MAX3107_BRGDIVLSB_REG           (0x1c00) /* Baud rate divisor LSB */
 105 #define MAX3107_BRGDIVMSB_REG           (0x1d00) /* Baud rate divisor MSB */
 106 #define MAX3107_CLKSRC_REG              (0x1e00) /* Clock source */
 107 #define MAX3107_REVID_REG               (0x1f00) /* Revision identification */
 108
 109 /* IRQ register bits */
 110 #define MAX3107_IRQ_LSR_BIT     (1 << 0) /* LSR interrupt */
 111 #define MAX3107_IRQ_SPCHR_BIT   (1 << 1) /* Special char interrupt */
 112 #define MAX3107_IRQ_STS_BIT     (1 << 2) /* Status interrupt */
 113 #define MAX3107_IRQ_RXFIFO_BIT  (1 << 3) /* RX FIFO interrupt */
 114 #define MAX3107_IRQ_TXFIFO_BIT  (1 << 4) /* TX FIFO interrupt */
 115 #define MAX3107_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */
 116 #define MAX3107_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */
 117 #define MAX3107_IRQ_CTS_BIT     (1 << 7) /* CTS interrupt */
 118
 119 /* LSR register bits */
 120 #define MAX3107_LSR_RXTO_BIT    (1 << 0) /* RX timeout */
 121 #define MAX3107_LSR_RXOVR_BIT   (1 << 1) /* RX overrun */
 122 #define MAX3107_LSR_RXPAR_BIT   (1 << 2) /* RX parity error */
 123 #define MAX3107_LSR_FRERR_BIT   (1 << 3) /* Frame error */
 124 #define MAX3107_LSR_RXBRK_BIT   (1 << 4) /* RX break */
 125 #define MAX3107_LSR_RXNOISE_BIT (1 << 5) /* RX noise */
 126 #define MAX3107_LSR_UNDEF6_BIT  (1 << 6) /* Undefined/not used */
 127 #define MAX3107_LSR_CTS_BIT     (1 << 7) /* CTS pin state */
 128
 129 /* Special character register bits */
 130 #define MAX3107_SPCHR_XON1_BIT          (1 << 0) /* XON1 character */
 131 #define MAX3107_SPCHR_XON2_BIT          (1 << 1) /* XON2 character */
 132 #define MAX3107_SPCHR_XOFF1_BIT         (1 << 2) /* XOFF1 character */
 133 #define MAX3107_SPCHR_XOFF2_BIT         (1 << 3) /* XOFF2 character */
 134 #define MAX3107_SPCHR_BREAK_BIT         (1 << 4) /* RX break */
 135 #define MAX3107_SPCHR_MULTIDROP_BIT     (1 << 5) /* 9-bit multidrop addr char */
 136 #define MAX3107_SPCHR_UNDEF6_BIT        (1 << 6) /* Undefined/not used */
 137 #define MAX3107_SPCHR_UNDEF7_BIT        (1 << 7) /* Undefined/not used */
 138
 139 /* Status register bits */
 140 #define MAX3107_STS_GPIO0_BIT           (1 << 0) /* GPIO 0 interrupt */
 141 #define MAX3107_STS_GPIO1_BIT           (1 << 1) /* GPIO 1 interrupt */
 142 #define MAX3107_STS_GPIO2_BIT           (1 << 2) /* GPIO 2 interrupt */
 143 #define MAX3107_STS_GPIO3_BIT           (1 << 3) /* GPIO 3 interrupt */
 144 #define MAX3107_STS_UNDEF4_BIT          (1 << 4) /* Undefined/not used */
 145 #define MAX3107_STS_CLKREADY_BIT        (1 << 5) /* Clock ready */
 146 #define MAX3107_STS_SLEEP_BIT           (1 << 6) /* Sleep interrupt */
 147 #define MAX3107_STS_UNDEF7_BIT          (1 << 7) /* Undefined/not used */
 148
 149 /* MODE1 register bits */
 150 #define MAX3107_MODE1_RXDIS_BIT         (1 << 0) /* RX disable */
 151 #define MAX3107_MODE1_TXDIS_BIT         (1 << 1) /* TX disable */
 152 #define MAX3107_MODE1_TXHIZ_BIT         (1 << 2) /* TX pin three-state */
 153 #define MAX3107_MODE1_RTSHIZ_BIT        (1 << 3) /* RTS pin three-state */
 154 #define MAX3107_MODE1_TRNSCVCTRL_BIT    (1 << 4) /* Transceiver ctrl enable */
 155 #define MAX3107_MODE1_FORCESLEEP_BIT    (1 << 5) /* Force sleep mode */
 156 #define MAX3107_MODE1_AUTOSLEEP_BIT     (1 << 6) /* Auto sleep enable */
 157 #define MAX3107_MODE1_IRQSEL_BIT        (1 << 7) /* IRQ pin enable */
 158
 159 /* MODE2 register bits */
 160 #define MAX3107_MODE2_RST_BIT           (1 << 0) /* Chip reset */
 161 #define MAX3107_MODE2_FIFORST_BIT       (1 << 1) /* FIFO reset */
 162 #define MAX3107_MODE2_RXTRIGINV_BIT     (1 << 2) /* RX FIFO INT invert */
 163 #define MAX3107_MODE2_RXEMPTINV_BIT     (1 << 3) /* RX FIFO empty INT invert */
 164 #define MAX3107_MODE2_SPCHR_BIT         (1 << 4) /* Special chr detect enable */
 165 #define MAX3107_MODE2_LOOPBACK_BIT      (1 << 5) /* Internal loopback enable */
 166 #define MAX3107_MODE2_MULTIDROP_BIT     (1 << 6) /* 9-bit multidrop enable */
 167 #define MAX3107_MODE2_ECHOSUPR_BIT      (1 << 7) /* ECHO suppression enable */
 168
 169 /* LCR register bits */
 170 #define MAX3107_LCR_LENGTH0_BIT         (1 << 0) /* Word length bit 0 */
 171 #define MAX3107_LCR_LENGTH1_BIT         (1 << 1) /* Word length bit 1
 172                                                   *
 173                                                   * Word length bits table:
 174                                                   * 00 -> 5 bit words
 175                                                   * 01 -> 6 bit words
 176                                                   * 10 -> 7 bit words
 177                                                   * 11 -> 8 bit words
 178                                                   */
 179 #define MAX3107_LCR_STOPLEN_BIT         (1 << 2) /* STOP length bit
 180                                                   *
 181                                                   * STOP length bit table:
 182                                                   * 0 -> 1 stop bit
 183                                                   * 1 -> 1-1.5 stop bits if
 184                                                   *      word length is 5,
 185                                                   *      2 stop bits otherwise
 186                                                   */
 187 #define MAX3107_LCR_PARITY_BIT          (1 << 3) /* Parity bit enable */
 188 #define MAX3107_LCR_EVENPARITY_BIT      (1 << 4) /* Even parity bit enable */
 189 #define MAX3107_LCR_FORCEPARITY_BIT     (1 << 5) /* 9-bit multidrop parity */
 190 #define MAX3107_LCR_TXBREAK_BIT         (1 << 6) /* TX break enable */
 191 #define MAX3107_LCR_RTS_BIT             (1 << 7) /* RTS pin control */
 192 #define MAX3107_LCR_WORD_LEN_5          (0x0000)
 193 #define MAX3107_LCR_WORD_LEN_6          (0x0001)
 194 #define MAX3107_LCR_WORD_LEN_7          (0x0002)
 195 #define MAX3107_LCR_WORD_LEN_8          (0x0003)
 196
 197
 198 /* IRDA register bits */
 199 #define MAX3107_IRDA_IRDAEN_BIT         (1 << 0) /* IRDA mode enable */
 200 #define MAX3107_IRDA_SIR_BIT            (1 << 1) /* SIR mode enable */
 201 #define MAX3107_IRDA_SHORTIR_BIT        (1 << 2) /* Short SIR mode enable */
 202 #define MAX3107_IRDA_MIR_BIT            (1 << 3) /* MIR mode enable */
 203 #define MAX3107_IRDA_RXINV_BIT          (1 << 4) /* RX logic inversion enable */
 204 #define MAX3107_IRDA_TXINV_BIT          (1 << 5) /* TX logic inversion enable */
 205 #define MAX3107_IRDA_UNDEF6_BIT         (1 << 6) /* Undefined/not used */
 206 #define MAX3107_IRDA_UNDEF7_BIT         (1 << 7) /* Undefined/not used */
 207
 208 /* Flow control trigger level register masks */
 209 #define MAX3107_FLOWLVL_HALT_MASK       (0x000f) /* Flow control halt level */
 210 #define MAX3107_FLOWLVL_RES_MASK        (0x00f0) /* Flow control resume level */
 211 #define MAX3107_FLOWLVL_HALT(words)     ((words/8) & 0x000f)
 212 #define MAX3107_FLOWLVL_RES(words)      (((words/8) & 0x000f) << 4)
 213
 214 /* FIFO interrupt trigger level register masks */
 215 #define MAX3107_FIFOTRIGLVL_TX_MASK     (0x000f) /* TX FIFO trigger level */
 216 #define MAX3107_FIFOTRIGLVL_RX_MASK     (0x00f0) /* RX FIFO trigger level */
 217 #define MAX3107_FIFOTRIGLVL_TX(words)   ((words/8) & 0x000f)
 218 #define MAX3107_FIFOTRIGLVL_RX(words)   (((words/8) & 0x000f) << 4)
 219
 220 /* Flow control register bits */
 221 #define MAX3107_FLOWCTRL_AUTORTS_BIT    (1 << 0) /* Auto RTS flow ctrl enable */
 222 #define MAX3107_FLOWCTRL_AUTOCTS_BIT    (1 << 1) /* Auto CTS flow ctrl enable */
 223 #define MAX3107_FLOWCTRL_GPIADDR_BIT    (1 << 2) /* Enables that GPIO inputs
 224                                                   * are used in conjunction with
 225                                                   * XOFF2 for definition of
 226                                                   * special character */
 227 #define MAX3107_FLOWCTRL_SWFLOWEN_BIT   (1 << 3) /* Auto SW flow ctrl enable */
 228 #define MAX3107_FLOWCTRL_SWFLOW0_BIT    (1 << 4) /* SWFLOW bit 0 */
 229 #define MAX3107_FLOWCTRL_SWFLOW1_BIT    (1 << 5) /* SWFLOW bit 1
 230                                                   *
 231                                                   * SWFLOW bits 1 & 0 table:
 232                                                   * 00 -> no transmitter flow
 233                                                   *       control
 234                                                   * 01 -> receiver compares
 235                                                   *       XON2 and XOFF2
 236                                                   *       and controls
 237                                                   *       transmitter
 238                                                   * 10 -> receiver compares
 239                                                   *       XON1 and XOFF1
 240                                                   *       and controls
 241                                                   *       transmitter
 242                                                   * 11 -> receiver compares
 243                                                   *       XON1, XON2, XOFF1 and
 244                                                   *       XOFF2 and controls
 245                                                   *       transmitter
 246                                                   */
 247 #define MAX3107_FLOWCTRL_SWFLOW2_BIT    (1 << 6) /* SWFLOW bit 2 */
 248 #define MAX3107_FLOWCTRL_SWFLOW3_BIT    (1 << 7) /* SWFLOW bit 3
 249                                                   *
 250                                                   * SWFLOW bits 3 & 2 table:
 251                                                   * 00 -> no received flow
 252                                                   *       control
 253                                                   * 01 -> transmitter generates
 254                                                   *       XON2 and XOFF2
 255                                                   * 10 -> transmitter generates
 256                                                   *       XON1 and XOFF1
 257                                                   * 11 -> transmitter generates
 258                                                   *       XON1, XON2, XOFF1 and
 259                                                   *       XOFF2
 260                                                   */
 261
 262 /* GPIO configuration register bits */
 263 #define MAX3107_GPIOCFG_GP0OUT_BIT      (1 << 0) /* GPIO 0 output enable */
 264 #define MAX3107_GPIOCFG_GP1OUT_BIT      (1 << 1) /* GPIO 1 output enable */
 265 #define MAX3107_GPIOCFG_GP2OUT_BIT      (1 << 2) /* GPIO 2 output enable */
 266 #define MAX3107_GPIOCFG_GP3OUT_BIT      (1 << 3) /* GPIO 3 output enable */
 267 #define MAX3107_GPIOCFG_GP0OD_BIT       (1 << 4) /* GPIO 0 open-drain enable */
 268 #define MAX3107_GPIOCFG_GP1OD_BIT       (1 << 5) /* GPIO 1 open-drain enable */
 269 #define MAX3107_GPIOCFG_GP2OD_BIT       (1 << 6) /* GPIO 2 open-drain enable */
 270 #define MAX3107_GPIOCFG_GP3OD_BIT       (1 << 7) /* GPIO 3 open-drain enable */
 271
 272 /* GPIO DATA register bits */
 273 #define MAX3107_GPIODATA_GP0OUT_BIT     (1 << 0) /* GPIO 0 output value */
 274 #define MAX3107_GPIODATA_GP1OUT_BIT     (1 << 1) /* GPIO 1 output value */
 275 #define MAX3107_GPIODATA_GP2OUT_BIT     (1 << 2) /* GPIO 2 output value */
 276 #define MAX3107_GPIODATA_GP3OUT_BIT     (1 << 3) /* GPIO 3 output value */
 277 #define MAX3107_GPIODATA_GP0IN_BIT      (1 << 4) /* GPIO 0 input value */
 278 #define MAX3107_GPIODATA_GP1IN_BIT      (1 << 5) /* GPIO 1 input value */
 279 #define MAX3107_GPIODATA_GP2IN_BIT      (1 << 6) /* GPIO 2 input value */
 280 #define MAX3107_GPIODATA_GP3IN_BIT      (1 << 7) /* GPIO 3 input value */
 281
 282 /* PLL configuration register masks */
 283 #define MAX3107_PLLCFG_PREDIV_MASK      (0x003f) /* PLL predivision value */
 284 #define MAX3107_PLLCFG_PLLFACTOR_MASK   (0x00c0) /* PLL multiplication factor */
 285
 286 /* Baud rate generator configuration register masks and bits */
 287 #define MAX3107_BRGCFG_FRACT_MASK       (0x000f) /* Fractional portion of
 288                                                   * Baud rate generator divisor
 289                                                   */
 290 #define MAX3107_BRGCFG_2XMODE_BIT       (1 << 4) /* Double baud rate */
 291 #define MAX3107_BRGCFG_4XMODE_BIT       (1 << 5) /* Quadruple baud rate */
 292 #define MAX3107_BRGCFG_UNDEF6_BIT       (1 << 6) /* Undefined/not used */
 293 #define MAX3107_BRGCFG_UNDEF7_BIT       (1 << 7) /* Undefined/not used */
 294
 295 /* Clock source register bits */
 296 #define MAX3107_CLKSRC_INTOSC_BIT       (1 << 0) /* Internal osc enable */
 297 #define MAX3107_CLKSRC_CRYST_BIT        (1 << 1) /* Crystal osc enable */
 298 #define MAX3107_CLKSRC_PLL_BIT          (1 << 2) /* PLL enable */
 299 #define MAX3107_CLKSRC_PLLBYP_BIT       (1 << 3) /* PLL bypass */
 300 #define MAX3107_CLKSRC_EXTCLK_BIT       (1 << 4) /* External clock enable */
 301 #define MAX3107_CLKSRC_UNDEF5_BIT       (1 << 5) /* Undefined/not used */
 302 #define MAX3107_CLKSRC_UNDEF6_BIT       (1 << 6) /* Undefined/not used */
 303 #define MAX3107_CLKSRC_CLK2RTS_BIT      (1 << 7) /* Baud clk to RTS pin */
 304
 305
 306 /* HW definitions */
 307 #define MAX3107_RX_FIFO_SIZE    128
 308 #define MAX3107_TX_FIFO_SIZE    128
 309 #define MAX3107_REVID1          0x00a0
 310 #define MAX3107_REVID2          0x00a1
 311
 312
 313 /* Baud rate generator configuration values for external clock 13MHz */
 314 #define MAX3107_BRG13_B300      (0x0A9400 | 0x05)
 315 #define MAX3107_BRG13_B600      (0x054A00 | 0x03)
 316 #define MAX3107_BRG13_B1200     (0x02A500 | 0x01)
 317 #define MAX3107_BRG13_B2400     (0x015200 | 0x09)
 318 #define MAX3107_BRG13_B4800     (0x00A900 | 0x04)
 319 #define MAX3107_BRG13_B9600     (0x005400 | 0x0A)
 320 #define MAX3107_BRG13_B19200    (0x002A00 | 0x05)
 321 #define MAX3107_BRG13_B38400    (0x001500 | 0x03)
 322 #define MAX3107_BRG13_B57600    (0x000E00 | 0x02)
 323 #define MAX3107_BRG13_B115200   (0x000700 | 0x01)
 324 #define MAX3107_BRG13_B230400   (0x000300 | 0x08)
 325 #define MAX3107_BRG13_B460800   (0x000100 | 0x0c)
 326 #define MAX3107_BRG13_B921600   (0x000100 | 0x1c)
 327
 328 /* Baud rate generator configuration values for external clock 26MHz */
 329 #define MAX3107_BRG26_B300      (0x152800 | 0x0A)
 330 #define MAX3107_BRG26_B600      (0x0A9400 | 0x05)
 331 #define MAX3107_BRG26_B1200     (0x054A00 | 0x03)
 332 #define MAX3107_BRG26_B2400     (0x02A500 | 0x01)
 333 #define MAX3107_BRG26_B4800     (0x015200 | 0x09)
 334 #define MAX3107_BRG26_B9600     (0x00A900 | 0x04)
 335 #define MAX3107_BRG26_B19200    (0x005400 | 0x0A)
 336 #define MAX3107_BRG26_B38400    (0x002A00 | 0x05)
 337 #define MAX3107_BRG26_B57600    (0x001C00 | 0x03)
 338 #define MAX3107_BRG26_B115200   (0x000E00 | 0x02)
 339 #define MAX3107_BRG26_B230400   (0x000700 | 0x01)
 340 #define MAX3107_BRG26_B460800   (0x000300 | 0x08)
 341 #define MAX3107_BRG26_B921600   (0x000100 | 0x0C)
 342
 343 /* Baud rate generator configuration values for internal clock */
 344 #define MAX3107_BRG13_IB300     (0x008000 | 0x00)
 345 #define MAX3107_BRG13_IB600     (0x004000 | 0x00)
 346 #define MAX3107_BRG13_IB1200    (0x002000 | 0x00)
 347 #define MAX3107_BRG13_IB2400    (0x001000 | 0x00)
 348 #define MAX3107_BRG13_IB4800    (0x000800 | 0x00)
 349 #define MAX3107_BRG13_IB9600    (0x000400 | 0x00)
 350 #define MAX3107_BRG13_IB19200   (0x000200 | 0x00)
 351 #define MAX3107_BRG13_IB38400   (0x000100 | 0x00)
 352 #define MAX3107_BRG13_IB57600   (0x000000 | 0x0B)
 353 #define MAX3107_BRG13_IB115200  (0x000000 | 0x05)
 354 #define MAX3107_BRG13_IB230400  (0x000000 | 0x03)
 355 #define MAX3107_BRG13_IB460800  (0x000000 | 0x00)
 356 #define MAX3107_BRG13_IB921600  (0x000000 | 0x00)
 357
 358
 359 struct baud_table {
 360         int baud;
 361         u32 new_brg;
 362 };
 363
 364 struct max3107_port {
 365         /* UART port structure */
 366         struct uart_port port;
 367
 368         /* SPI device structure */
 369         struct spi_device *spi;
 370
 371 #if defined(CONFIG_GPIOLIB)
 372         /* GPIO chip structure */
 373         struct gpio_chip chip;
 374 #endif
 375
 376         /* Workqueue that does all the magic */
 377         struct workqueue_struct *workqueue;
 378         struct work_struct work;
 379
 380         /* Lock for shared data */
 381         spinlock_t data_lock;
 382
 383         /* Device configuration */
 384         int ext_clk;            /* 1 if external clock used */
 385         int loopback;           /* Current loopback mode state */
 386         int baud;                       /* Current baud rate */
 387
 388         /* State flags */
 389         int suspended;          /* Indicates suspend mode */
 390         int tx_fifo_empty;      /* Flag for TX FIFO state */
 391         int rx_enabled;         /* Flag for receiver state */
 392         int tx_enabled;         /* Flag for transmitter state */
 393
 394         u16 irqen_reg;          /* Current IRQ enable register value */
 395         /* Shared data */
 396         u16 mode1_reg;          /* Current mode1 register value*/
 397         int mode1_commit;       /* Flag for setting new mode1 register value */
 398         u16 lcr_reg;            /* Current LCR register value */
 399         int lcr_commit;         /* Flag for setting new LCR register value */
 400         u32 brg_cfg;            /* Current Baud rate generator config  */
 401         int brg_commit;         /* Flag for setting new baud rate generator
 402                                  * config
 403                                  */
 404         struct baud_table *baud_tbl;
 405         int handle_irq;         /* Indicates that IRQ should be handled */
 406
 407         /* Rx buffer and str*/
 408         u16 *rxbuf;
 409         u8  *rxstr;
 410         /* Tx buffer*/
 411         u16 *txbuf;
 412
 413         struct max3107_plat *pdata;     /* Platform data */
 414 };
 415
 416 /* Platform data structure */
 417 struct max3107_plat {
 418         /* Loopback mode enable */
 419         int loopback;
 420         /* External clock enable */
 421         int ext_clk;
 422         /* Called during the register initialisation */
 423         void (*init)(struct max3107_port *s);
 424         /* Called when the port is found and configured */
 425         int (*configure)(struct max3107_port *s);
 426         /* HW suspend function */
 427         void (*hw_suspend) (struct max3107_port *s, int suspend);
 428         /* Polling mode enable */
 429         int polled_mode;
 430         /* Polling period if polling mode enabled */
 431         int poll_time;
 432 };
 433
 434 extern int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len);
 435 extern void max3107_hw_susp(struct max3107_port *s, int suspend);
 436 extern int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata);
 437 extern int max3107_remove(struct spi_device *spi);
 438 extern int max3107_suspend(struct spi_device *spi, pm_message_t state);
 439 extern int max3107_resume(struct spi_device *spi);
 440
 441 #endif /* _LINUX_SERIAL_MAX3107_H */