drivers/media/rc/nuvoton-cir.h

   1 /*
   2  * Driver for Nuvoton Technology Corporation w83667hg/w83677hg-i CIR
   3  *
   4  * Copyright (C) 2010 Jarod Wilson <jarod@redhat.com>
   5  * Copyright (C) 2009 Nuvoton PS Team
   6  *
   7  * Special thanks to Nuvoton for providing hardware, spec sheets and
   8  * sample code upon which portions of this driver are based. Indirect
   9  * thanks also to Maxim Levitsky, whose ene_ir driver this driver is
  10  * modeled after.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  25  * USA
  26  */
  27
  28 #include <linux/spinlock.h>
  29 #include <linux/ioctl.h>
  30
  31 /* platform driver name to register */
  32 #define NVT_DRIVER_NAME "nuvoton-cir"
  33
  34 /* debugging module parameter */
  35 static int debug;
  36
  37
  38 #define nvt_dbg(text, ...) \
  39         if (debug) \
  40                 printk(KERN_DEBUG \
  41                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  42
  43 #define nvt_dbg_verbose(text, ...) \
  44         if (debug > 1) \
  45                 printk(KERN_DEBUG \
  46                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  47
  48 #define nvt_dbg_wake(text, ...) \
  49         if (debug > 2) \
  50                 printk(KERN_DEBUG \
  51                         KBUILD_MODNAME ": " text "\n" , ## __VA_ARGS__)
  52
  53
  54 /*
  55  * Original lirc driver said min value of 76, and recommended value of 256
  56  * for the buffer length, but then used 2048. Never mind that the size of the
  57  * RX FIFO is 32 bytes... So I'm using 32 for RX and 256 for TX atm, but I'm
  58  * not sure if maybe that TX value is off by a factor of 8 (bits vs. bytes),
  59  * and I don't have TX-capable hardware to test/debug on...
  60  */
  61 #define TX_BUF_LEN 256
  62 #define RX_BUF_LEN 32
  63
  64 #define SIO_ID_MASK 0xfff0
  65
  66 enum nvt_chip_ver {
  67         NVT_UNKNOWN     = 0,
  68         NVT_W83667HG    = 0xa510,
  69         NVT_6775F       = 0xb470,
  70         NVT_6776F       = 0xc330,
  71         NVT_6779D       = 0xc560,
  72         NVT_INVALID     = 0xffff,
  73 };
  74
  75 struct nvt_chip {
  76         const char *name;
  77         enum nvt_chip_ver chip_ver;
  78 };
  79
  80 struct nvt_dev {
  81         struct pnp_dev *pdev;
  82         struct rc_dev *rdev;
  83
  84         spinlock_t nvt_lock;
  85
  86         /* for rx */
  87         u8 buf[RX_BUF_LEN];
  88         unsigned int pkts;
  89
  90         struct {
  91                 spinlock_t lock;
  92                 u8 buf[TX_BUF_LEN];
  93                 unsigned int buf_count;
  94                 unsigned int cur_buf_num;
  95                 wait_queue_head_t queue;
  96                 u8 tx_state;
  97         } tx;
  98
  99         /* EFER Config register index/data pair */
 100         u32 cr_efir;
 101         u32 cr_efdr;
 102
 103         /* hardware I/O settings */
 104         unsigned long cir_addr;
 105         unsigned long cir_wake_addr;
 106         int cir_irq;
 107         int cir_wake_irq;
 108
 109         enum nvt_chip_ver chip_ver;
 110         /* hardware id */
 111         u8 chip_major;
 112         u8 chip_minor;
 113
 114         /* hardware features */
 115         bool hw_learning_capable;
 116         bool hw_tx_capable;
 117
 118         /* rx settings */
 119         bool learning_enabled;
 120
 121         /* track cir wake state */
 122         u8 wake_state;
 123         /* for study */
 124         u8 study_state;
 125         /* carrier period = 1 / frequency */
 126         u32 carrier;
 127 };
 128
 129 /* study states */
 130 #define ST_STUDY_NONE      0x0
 131 #define ST_STUDY_START     0x1
 132 #define ST_STUDY_CARRIER   0x2
 133 #define ST_STUDY_ALL_RECV  0x4
 134
 135 /* wake states */
 136 #define ST_WAKE_NONE    0x0
 137 #define ST_WAKE_START   0x1
 138 #define ST_WAKE_FINISH  0x2
 139
 140 /* receive states */
 141 #define ST_RX_WAIT_7F           0x1
 142 #define ST_RX_WAIT_HEAD         0x2
 143 #define ST_RX_WAIT_SILENT_END   0x4
 144
 145 /* send states */
 146 #define ST_TX_NONE      0x0
 147 #define ST_TX_REQUEST   0x2
 148 #define ST_TX_REPLY     0x4
 149
 150 /* buffer packet constants */
 151 #define BUF_PULSE_BIT   0x80
 152 #define BUF_LEN_MASK    0x7f
 153 #define BUF_REPEAT_BYTE 0x70
 154 #define BUF_REPEAT_MASK 0xf0
 155
 156 /* CIR settings */
 157
 158 /* total length of CIR and CIR WAKE */
 159 #define CIR_IOREG_LENGTH        0x0f
 160
 161 /* RX limit length, 8 high bits for SLCH, 8 low bits for SLCL */
 162 #define CIR_RX_LIMIT_COUNT  (IR_DEFAULT_TIMEOUT / US_TO_NS(SAMPLE_PERIOD))
 163
 164 /* CIR Regs */
 165 #define CIR_IRCON       0x00
 166 #define CIR_IRSTS       0x01
 167 #define CIR_IREN        0x02
 168 #define CIR_RXFCONT     0x03
 169 #define CIR_CP          0x04
 170 #define CIR_CC          0x05
 171 #define CIR_SLCH        0x06
 172 #define CIR_SLCL        0x07
 173 #define CIR_FIFOCON     0x08
 174 #define CIR_IRFIFOSTS   0x09
 175 #define CIR_SRXFIFO     0x0a
 176 #define CIR_TXFCONT     0x0b
 177 #define CIR_STXFIFO     0x0c
 178 #define CIR_FCCH        0x0d
 179 #define CIR_FCCL        0x0e
 180 #define CIR_IRFSM       0x0f
 181
 182 /* CIR IRCON settings */
 183 #define CIR_IRCON_RECV   0x80
 184 #define CIR_IRCON_WIREN  0x40
 185 #define CIR_IRCON_TXEN   0x20
 186 #define CIR_IRCON_RXEN   0x10
 187 #define CIR_IRCON_WRXINV 0x08
 188 #define CIR_IRCON_RXINV  0x04
 189
 190 #define CIR_IRCON_SAMPLE_PERIOD_SEL_1   0x00
 191 #define CIR_IRCON_SAMPLE_PERIOD_SEL_25  0x01
 192 #define CIR_IRCON_SAMPLE_PERIOD_SEL_50  0x02
 193 #define CIR_IRCON_SAMPLE_PERIOD_SEL_100 0x03
 194
 195 /* FIXME: make this a runtime option */
 196 /* select sample period as 50us */
 197 #define CIR_IRCON_SAMPLE_PERIOD_SEL     CIR_IRCON_SAMPLE_PERIOD_SEL_50
 198
 199 /* CIR IRSTS settings */
 200 #define CIR_IRSTS_RDR   0x80
 201 #define CIR_IRSTS_RTR   0x40
 202 #define CIR_IRSTS_PE    0x20
 203 #define CIR_IRSTS_RFO   0x10
 204 #define CIR_IRSTS_TE    0x08
 205 #define CIR_IRSTS_TTR   0x04
 206 #define CIR_IRSTS_TFU   0x02
 207 #define CIR_IRSTS_GH    0x01
 208
 209 /* CIR IREN settings */
 210 #define CIR_IREN_RDR    0x80
 211 #define CIR_IREN_RTR    0x40
 212 #define CIR_IREN_PE     0x20
 213 #define CIR_IREN_RFO    0x10
 214 #define CIR_IREN_TE     0x08
 215 #define CIR_IREN_TTR    0x04
 216 #define CIR_IREN_TFU    0x02
 217 #define CIR_IREN_GH     0x01
 218
 219 /* CIR FIFOCON settings */
 220 #define CIR_FIFOCON_TXFIFOCLR           0x80
 221
 222 #define CIR_FIFOCON_TX_TRIGGER_LEV_31   0x00
 223 #define CIR_FIFOCON_TX_TRIGGER_LEV_24   0x10
 224 #define CIR_FIFOCON_TX_TRIGGER_LEV_16   0x20
 225 #define CIR_FIFOCON_TX_TRIGGER_LEV_8    0x30
 226
 227 /* FIXME: make this a runtime option */
 228 /* select TX trigger level as 16 */
 229 #define CIR_FIFOCON_TX_TRIGGER_LEV      CIR_FIFOCON_TX_TRIGGER_LEV_16
 230
 231 #define CIR_FIFOCON_RXFIFOCLR           0x08
 232
 233 #define CIR_FIFOCON_RX_TRIGGER_LEV_1    0x00
 234 #define CIR_FIFOCON_RX_TRIGGER_LEV_8    0x01
 235 #define CIR_FIFOCON_RX_TRIGGER_LEV_16   0x02
 236 #define CIR_FIFOCON_RX_TRIGGER_LEV_24   0x03
 237
 238 /* FIXME: make this a runtime option */
 239 /* select RX trigger level as 24 */
 240 #define CIR_FIFOCON_RX_TRIGGER_LEV      CIR_FIFOCON_RX_TRIGGER_LEV_24
 241
 242 /* CIR IRFIFOSTS settings */
 243 #define CIR_IRFIFOSTS_IR_PENDING        0x80
 244 #define CIR_IRFIFOSTS_RX_GS             0x40
 245 #define CIR_IRFIFOSTS_RX_FTA            0x20
 246 #define CIR_IRFIFOSTS_RX_EMPTY          0x10
 247 #define CIR_IRFIFOSTS_RX_FULL           0x08
 248 #define CIR_IRFIFOSTS_TX_FTA            0x04
 249 #define CIR_IRFIFOSTS_TX_EMPTY          0x02
 250 #define CIR_IRFIFOSTS_TX_FULL           0x01
 251
 252
 253 /* CIR WAKE UP Regs */
 254 #define CIR_WAKE_IRCON                  0x00
 255 #define CIR_WAKE_IRSTS                  0x01
 256 #define CIR_WAKE_IREN                   0x02
 257 #define CIR_WAKE_FIFO_CMP_DEEP          0x03
 258 #define CIR_WAKE_FIFO_CMP_TOL           0x04
 259 #define CIR_WAKE_FIFO_COUNT             0x05
 260 #define CIR_WAKE_SLCH                   0x06
 261 #define CIR_WAKE_SLCL                   0x07
 262 #define CIR_WAKE_FIFOCON                0x08
 263 #define CIR_WAKE_SRXFSTS                0x09
 264 #define CIR_WAKE_SAMPLE_RX_FIFO         0x0a
 265 #define CIR_WAKE_WR_FIFO_DATA           0x0b
 266 #define CIR_WAKE_RD_FIFO_ONLY           0x0c
 267 #define CIR_WAKE_RD_FIFO_ONLY_IDX       0x0d
 268 #define CIR_WAKE_FIFO_IGNORE            0x0e
 269 #define CIR_WAKE_IRFSM                  0x0f
 270
 271 /* CIR WAKE UP IRCON settings */
 272 #define CIR_WAKE_IRCON_DEC_RST          0x80
 273 #define CIR_WAKE_IRCON_MODE1            0x40
 274 #define CIR_WAKE_IRCON_MODE0            0x20
 275 #define CIR_WAKE_IRCON_RXEN             0x10
 276 #define CIR_WAKE_IRCON_R                0x08
 277 #define CIR_WAKE_IRCON_RXINV            0x04
 278
 279 /* FIXME/jarod: make this a runtime option */
 280 /* select a same sample period like cir register */
 281 #define CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL        CIR_IRCON_SAMPLE_PERIOD_SEL_50
 282
 283 /* CIR WAKE IRSTS Bits */
 284 #define CIR_WAKE_IRSTS_RDR              0x80
 285 #define CIR_WAKE_IRSTS_RTR              0x40
 286 #define CIR_WAKE_IRSTS_PE               0x20
 287 #define CIR_WAKE_IRSTS_RFO              0x10
 288 #define CIR_WAKE_IRSTS_GH               0x08
 289 #define CIR_WAKE_IRSTS_IR_PENDING       0x01
 290
 291 /* CIR WAKE UP IREN Bits */
 292 #define CIR_WAKE_IREN_RDR               0x80
 293 #define CIR_WAKE_IREN_RTR               0x40
 294 #define CIR_WAKE_IREN_PE                0x20
 295 #define CIR_WAKE_IREN_RFO               0x10
 296 #define CIR_WAKE_IREN_TE                0x08
 297 #define CIR_WAKE_IREN_TTR               0x04
 298 #define CIR_WAKE_IREN_TFU               0x02
 299 #define CIR_WAKE_IREN_GH                0x01
 300
 301 /* CIR WAKE FIFOCON settings */
 302 #define CIR_WAKE_FIFOCON_RXFIFOCLR      0x08
 303
 304 #define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_67      0x00
 305 #define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_66      0x01
 306 #define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_65      0x02
 307 #define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_64      0x03
 308
 309 /* FIXME: make this a runtime option */
 310 /* select WAKE UP RX trigger level as 67 */
 311 #define CIR_WAKE_FIFOCON_RX_TRIGGER_LEV CIR_WAKE_FIFOCON_RX_TRIGGER_LEV_67
 312
 313 /* CIR WAKE SRXFSTS settings */
 314 #define CIR_WAKE_IRFIFOSTS_RX_GS        0x80
 315 #define CIR_WAKE_IRFIFOSTS_RX_FTA       0x40
 316 #define CIR_WAKE_IRFIFOSTS_RX_EMPTY     0x20
 317 #define CIR_WAKE_IRFIFOSTS_RX_FULL      0x10
 318
 319 /*
 320  * The CIR Wake FIFO buffer is 67 bytes long, but the stock remote wakes
 321  * the system comparing only 65 bytes (fails with this set to 67)
 322  */
 323 #define CIR_WAKE_FIFO_CMP_BYTES         65
 324 /* CIR Wake byte comparison tolerance */
 325 #define CIR_WAKE_CMP_TOLERANCE          5
 326
 327 /*
 328  * Extended Function Enable Registers:
 329  *  Extended Function Index Register
 330  *  Extended Function Data Register
 331  */
 332 #define CR_EFIR                 0x2e
 333 #define CR_EFDR                 0x2f
 334
 335 /* Possible alternate EFER values, depends on how the chip is wired */
 336 #define CR_EFIR2                0x4e
 337 #define CR_EFDR2                0x4f
 338
 339 /* Extended Function Mode enable/disable magic values */
 340 #define EFER_EFM_ENABLE         0x87
 341 #define EFER_EFM_DISABLE        0xaa
 342
 343 /* Config regs we need to care about */
 344 #define CR_SOFTWARE_RESET       0x02
 345 #define CR_LOGICAL_DEV_SEL      0x07
 346 #define CR_CHIP_ID_HI           0x20
 347 #define CR_CHIP_ID_LO           0x21
 348 #define CR_DEV_POWER_DOWN       0x22 /* bit 2 is CIR power, default power on */
 349 #define CR_OUTPUT_PIN_SEL       0x27
 350 #define CR_MULTIFUNC_PIN_SEL    0x2c
 351 #define CR_LOGICAL_DEV_EN       0x30 /* valid for all logical devices */
 352 /* next three regs valid for both the CIR and CIR_WAKE logical devices */
 353 #define CR_CIR_BASE_ADDR_HI     0x60
 354 #define CR_CIR_BASE_ADDR_LO     0x61
 355 #define CR_CIR_IRQ_RSRC         0x70
 356 /* next three regs valid only for ACPI logical dev */
 357 #define CR_ACPI_CIR_WAKE        0xe0
 358 #define CR_ACPI_IRQ_EVENTS      0xf6
 359 #define CR_ACPI_IRQ_EVENTS2     0xf7
 360
 361 /* Logical devices that we need to care about */
 362 #define LOGICAL_DEV_LPT         0x01
 363 #define LOGICAL_DEV_CIR         0x06
 364 #define LOGICAL_DEV_ACPI        0x0a
 365 #define LOGICAL_DEV_CIR_WAKE    0x0e
 366
 367 #define LOGICAL_DEV_DISABLE     0x00
 368 #define LOGICAL_DEV_ENABLE      0x01
 369
 370 #define CIR_WAKE_ENABLE_BIT     0x08
 371 #define PME_INTR_CIR_PASS_BIT   0x08
 372
 373 /* w83677hg CIR pin config */
 374 #define OUTPUT_PIN_SEL_MASK     0xbc
 375 #define OUTPUT_ENABLE_CIR       0x01 /* Pin95=CIRRX, Pin96=CIRTX1 */
 376 #define OUTPUT_ENABLE_CIRWB     0x40 /* enable wide-band sensor */
 377
 378 /* w83667hg CIR pin config */
 379 #define MULTIFUNC_PIN_SEL_MASK  0x1f
 380 #define MULTIFUNC_ENABLE_CIR    0x80 /* Pin75=CIRRX, Pin76=CIRTX1 */
 381 #define MULTIFUNC_ENABLE_CIRWB  0x20 /* enable wide-band sensor */
 382
 383 /* MCE CIR signal length, related on sample period */
 384
 385 /* MCE CIR controller signal length: about 43ms
 386  * 43ms / 50us (sample period) * 0.85 (inaccuracy)
 387  */
 388 #define CONTROLLER_BUF_LEN_MIN 830
 389
 390 /* MCE CIR keyboard signal length: about 26ms
 391  * 26ms / 50us (sample period) * 0.85 (inaccuracy)
 392  */
 393 #define KEYBOARD_BUF_LEN_MAX 650
 394 #define KEYBOARD_BUF_LEN_MIN 610
 395
 396 /* MCE CIR mouse signal length: about 24ms
 397  * 24ms / 50us (sample period) * 0.85 (inaccuracy)
 398  */
 399 #define MOUSE_BUF_LEN_MIN 565
 400
 401 #define CIR_SAMPLE_PERIOD 50
 402 #define CIR_SAMPLE_LOW_INACCURACY 0.85
 403
 404 /* MAX silence time that driver will sent to lirc */
 405 #define MAX_SILENCE_TIME 60000
 406
 407 #if CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_100
 408 #define SAMPLE_PERIOD 100
 409
 410 #elif CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_50
 411 #define SAMPLE_PERIOD 50
 412
 413 #elif CIR_IRCON_SAMPLE_PERIOD_SEL == CIR_IRCON_SAMPLE_PERIOD_SEL_25
 414 #define SAMPLE_PERIOD 25
 415
 416 #else
 417 #define SAMPLE_PERIOD 1
 418 #endif
 419
 420 /* as VISTA MCE definition, valid carrier value */
 421 #define MAX_CARRIER 60000
 422 #define MIN_CARRIER 30000