drivers/mfd/mc13xxx-core.c

   1 /*
   2  * Copyright 2009-2010 Pengutronix
   3  * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
   4  *
   5  * loosely based on an earlier driver that has
   6  * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it under
   9  * the terms of the GNU General Public License version 2 as published by the
  10  * Free Software Foundation.
  11  */
  12
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/mutex.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/spi/spi.h>
  19 #include <linux/mfd/core.h>
  20 #include <linux/mfd/mc13xxx.h>
  21 #include <linux/of.h>
  22 #include <linux/of_device.h>
  23 #include <linux/of_gpio.h>
  24
  25 struct mc13xxx {
  26         struct spi_device *spidev;
  27         struct mutex lock;
  28         int irq;
  29         int flags;
  30
  31         irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
  32         void *irqdata[MC13XXX_NUM_IRQ];
  33
  34         int adcflags;
  35 };
  36
  37 #define MC13XXX_IRQSTAT0        0
  38 #define MC13XXX_IRQSTAT0_ADCDONEI       (1 << 0)
  39 #define MC13XXX_IRQSTAT0_ADCBISDONEI    (1 << 1)
  40 #define MC13XXX_IRQSTAT0_TSI            (1 << 2)
  41 #define MC13783_IRQSTAT0_WHIGHI         (1 << 3)
  42 #define MC13783_IRQSTAT0_WLOWI          (1 << 4)
  43 #define MC13XXX_IRQSTAT0_CHGDETI        (1 << 6)
  44 #define MC13783_IRQSTAT0_CHGOVI         (1 << 7)
  45 #define MC13XXX_IRQSTAT0_CHGREVI        (1 << 8)
  46 #define MC13XXX_IRQSTAT0_CHGSHORTI      (1 << 9)
  47 #define MC13XXX_IRQSTAT0_CCCVI          (1 << 10)
  48 #define MC13XXX_IRQSTAT0_CHGCURRI       (1 << 11)
  49 #define MC13XXX_IRQSTAT0_BPONI          (1 << 12)
  50 #define MC13XXX_IRQSTAT0_LOBATLI        (1 << 13)
  51 #define MC13XXX_IRQSTAT0_LOBATHI        (1 << 14)
  52 #define MC13783_IRQSTAT0_UDPI           (1 << 15)
  53 #define MC13783_IRQSTAT0_USBI           (1 << 16)
  54 #define MC13783_IRQSTAT0_IDI            (1 << 19)
  55 #define MC13783_IRQSTAT0_SE1I           (1 << 21)
  56 #define MC13783_IRQSTAT0_CKDETI         (1 << 22)
  57 #define MC13783_IRQSTAT0_UDMI           (1 << 23)
  58
  59 #define MC13XXX_IRQMASK0        1
  60 #define MC13XXX_IRQMASK0_ADCDONEM       MC13XXX_IRQSTAT0_ADCDONEI
  61 #define MC13XXX_IRQMASK0_ADCBISDONEM    MC13XXX_IRQSTAT0_ADCBISDONEI
  62 #define MC13XXX_IRQMASK0_TSM            MC13XXX_IRQSTAT0_TSI
  63 #define MC13783_IRQMASK0_WHIGHM         MC13783_IRQSTAT0_WHIGHI
  64 #define MC13783_IRQMASK0_WLOWM          MC13783_IRQSTAT0_WLOWI
  65 #define MC13XXX_IRQMASK0_CHGDETM        MC13XXX_IRQSTAT0_CHGDETI
  66 #define MC13783_IRQMASK0_CHGOVM         MC13783_IRQSTAT0_CHGOVI
  67 #define MC13XXX_IRQMASK0_CHGREVM        MC13XXX_IRQSTAT0_CHGREVI
  68 #define MC13XXX_IRQMASK0_CHGSHORTM      MC13XXX_IRQSTAT0_CHGSHORTI
  69 #define MC13XXX_IRQMASK0_CCCVM          MC13XXX_IRQSTAT0_CCCVI
  70 #define MC13XXX_IRQMASK0_CHGCURRM       MC13XXX_IRQSTAT0_CHGCURRI
  71 #define MC13XXX_IRQMASK0_BPONM          MC13XXX_IRQSTAT0_BPONI
  72 #define MC13XXX_IRQMASK0_LOBATLM        MC13XXX_IRQSTAT0_LOBATLI
  73 #define MC13XXX_IRQMASK0_LOBATHM        MC13XXX_IRQSTAT0_LOBATHI
  74 #define MC13783_IRQMASK0_UDPM           MC13783_IRQSTAT0_UDPI
  75 #define MC13783_IRQMASK0_USBM           MC13783_IRQSTAT0_USBI
  76 #define MC13783_IRQMASK0_IDM            MC13783_IRQSTAT0_IDI
  77 #define MC13783_IRQMASK0_SE1M           MC13783_IRQSTAT0_SE1I
  78 #define MC13783_IRQMASK0_CKDETM         MC13783_IRQSTAT0_CKDETI
  79 #define MC13783_IRQMASK0_UDMM           MC13783_IRQSTAT0_UDMI
  80
  81 #define MC13XXX_IRQSTAT1        3
  82 #define MC13XXX_IRQSTAT1_1HZI           (1 << 0)
  83 #define MC13XXX_IRQSTAT1_TODAI          (1 << 1)
  84 #define MC13783_IRQSTAT1_ONOFD1I        (1 << 3)
  85 #define MC13783_IRQSTAT1_ONOFD2I        (1 << 4)
  86 #define MC13783_IRQSTAT1_ONOFD3I        (1 << 5)
  87 #define MC13XXX_IRQSTAT1_SYSRSTI        (1 << 6)
  88 #define MC13XXX_IRQSTAT1_RTCRSTI        (1 << 7)
  89 #define MC13XXX_IRQSTAT1_PCI            (1 << 8)
  90 #define MC13XXX_IRQSTAT1_WARMI          (1 << 9)
  91 #define MC13XXX_IRQSTAT1_MEMHLDI        (1 << 10)
  92 #define MC13783_IRQSTAT1_PWRRDYI        (1 << 11)
  93 #define MC13XXX_IRQSTAT1_THWARNLI       (1 << 12)
  94 #define MC13XXX_IRQSTAT1_THWARNHI       (1 << 13)
  95 #define MC13XXX_IRQSTAT1_CLKI           (1 << 14)
  96 #define MC13783_IRQSTAT1_SEMAFI         (1 << 15)
  97 #define MC13783_IRQSTAT1_MC2BI          (1 << 17)
  98 #define MC13783_IRQSTAT1_HSDETI         (1 << 18)
  99 #define MC13783_IRQSTAT1_HSLI           (1 << 19)
 100 #define MC13783_IRQSTAT1_ALSPTHI        (1 << 20)
 101 #define MC13783_IRQSTAT1_AHSSHORTI      (1 << 21)
 102
 103 #define MC13XXX_IRQMASK1        4
 104 #define MC13XXX_IRQMASK1_1HZM           MC13XXX_IRQSTAT1_1HZI
 105 #define MC13XXX_IRQMASK1_TODAM          MC13XXX_IRQSTAT1_TODAI
 106 #define MC13783_IRQMASK1_ONOFD1M        MC13783_IRQSTAT1_ONOFD1I
 107 #define MC13783_IRQMASK1_ONOFD2M        MC13783_IRQSTAT1_ONOFD2I
 108 #define MC13783_IRQMASK1_ONOFD3M        MC13783_IRQSTAT1_ONOFD3I
 109 #define MC13XXX_IRQMASK1_SYSRSTM        MC13XXX_IRQSTAT1_SYSRSTI
 110 #define MC13XXX_IRQMASK1_RTCRSTM        MC13XXX_IRQSTAT1_RTCRSTI
 111 #define MC13XXX_IRQMASK1_PCM            MC13XXX_IRQSTAT1_PCI
 112 #define MC13XXX_IRQMASK1_WARMM          MC13XXX_IRQSTAT1_WARMI
 113 #define MC13XXX_IRQMASK1_MEMHLDM        MC13XXX_IRQSTAT1_MEMHLDI
 114 #define MC13783_IRQMASK1_PWRRDYM        MC13783_IRQSTAT1_PWRRDYI
 115 #define MC13XXX_IRQMASK1_THWARNLM       MC13XXX_IRQSTAT1_THWARNLI
 116 #define MC13XXX_IRQMASK1_THWARNHM       MC13XXX_IRQSTAT1_THWARNHI
 117 #define MC13XXX_IRQMASK1_CLKM           MC13XXX_IRQSTAT1_CLKI
 118 #define MC13783_IRQMASK1_SEMAFM         MC13783_IRQSTAT1_SEMAFI
 119 #define MC13783_IRQMASK1_MC2BM          MC13783_IRQSTAT1_MC2BI
 120 #define MC13783_IRQMASK1_HSDETM         MC13783_IRQSTAT1_HSDETI
 121 #define MC13783_IRQMASK1_HSLM           MC13783_IRQSTAT1_HSLI
 122 #define MC13783_IRQMASK1_ALSPTHM        MC13783_IRQSTAT1_ALSPTHI
 123 #define MC13783_IRQMASK1_AHSSHORTM      MC13783_IRQSTAT1_AHSSHORTI
 124
 125 #define MC13XXX_REVISION        7
 126 #define MC13XXX_REVISION_REVMETAL       (0x07 <<  0)
 127 #define MC13XXX_REVISION_REVFULL        (0x03 <<  3)
 128 #define MC13XXX_REVISION_ICID           (0x07 <<  6)
 129 #define MC13XXX_REVISION_FIN            (0x03 <<  9)
 130 #define MC13XXX_REVISION_FAB            (0x03 << 11)
 131 #define MC13XXX_REVISION_ICIDCODE       (0x3f << 13)
 132
 133 #define MC13XXX_ADC1            44
 134 #define MC13XXX_ADC1_ADEN               (1 << 0)
 135 #define MC13XXX_ADC1_RAND               (1 << 1)
 136 #define MC13XXX_ADC1_ADSEL              (1 << 3)
 137 #define MC13XXX_ADC1_ASC                (1 << 20)
 138 #define MC13XXX_ADC1_ADTRIGIGN          (1 << 21)
 139
 140 #define MC13XXX_ADC2            45
 141
 142 #define MC13XXX_NUMREGS 0x3f
 143
 144 void mc13xxx_lock(struct mc13xxx *mc13xxx)
 145 {
 146         if (!mutex_trylock(&mc13xxx->lock)) {
 147                 dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n",
 148                                 __func__, __builtin_return_address(0));
 149
 150                 mutex_lock(&mc13xxx->lock);
 151         }
 152         dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
 153                         __func__, __builtin_return_address(0));
 154 }
 155 EXPORT_SYMBOL(mc13xxx_lock);
 156
 157 void mc13xxx_unlock(struct mc13xxx *mc13xxx)
 158 {
 159         dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
 160                         __func__, __builtin_return_address(0));
 161         mutex_unlock(&mc13xxx->lock);
 162 }
 163 EXPORT_SYMBOL(mc13xxx_unlock);
 164
 165 #define MC13XXX_REGOFFSET_SHIFT 25
 166 int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
 167 {
 168         struct spi_transfer t;
 169         struct spi_message m;
 170         int ret;
 171
 172         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 173
 174         if (offset > MC13XXX_NUMREGS)
 175                 return -EINVAL;
 176
 177         *val = offset << MC13XXX_REGOFFSET_SHIFT;
 178
 179         memset(&t, 0, sizeof(t));
 180
 181         t.tx_buf = val;
 182         t.rx_buf = val;
 183         t.len = sizeof(u32);
 184
 185         spi_message_init(&m);
 186         spi_message_add_tail(&t, &m);
 187
 188         ret = spi_sync(mc13xxx->spidev, &m);
 189
 190         /* error in message.status implies error return from spi_sync */
 191         BUG_ON(!ret && m.status);
 192
 193         if (ret)
 194                 return ret;
 195
 196         *val &= 0xffffff;
 197
 198         dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
 199
 200         return 0;
 201 }
 202 EXPORT_SYMBOL(mc13xxx_reg_read);
 203
 204 int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
 205 {
 206         u32 buf;
 207         struct spi_transfer t;
 208         struct spi_message m;
 209         int ret;
 210
 211         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 212
 213         dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val);
 214
 215         if (offset > MC13XXX_NUMREGS || val > 0xffffff)
 216                 return -EINVAL;
 217
 218         buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val;
 219
 220         memset(&t, 0, sizeof(t));
 221
 222         t.tx_buf = &buf;
 223         t.rx_buf = &buf;
 224         t.len = sizeof(u32);
 225
 226         spi_message_init(&m);
 227         spi_message_add_tail(&t, &m);
 228
 229         ret = spi_sync(mc13xxx->spidev, &m);
 230
 231         BUG_ON(!ret && m.status);
 232
 233         if (ret)
 234                 return ret;
 235
 236         return 0;
 237 }
 238 EXPORT_SYMBOL(mc13xxx_reg_write);
 239
 240 int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
 241                 u32 mask, u32 val)
 242 {
 243         int ret;
 244         u32 valread;
 245
 246         BUG_ON(val & ~mask);
 247
 248         ret = mc13xxx_reg_read(mc13xxx, offset, &valread);
 249         if (ret)
 250                 return ret;
 251
 252         valread = (valread & ~mask) | val;
 253
 254         return mc13xxx_reg_write(mc13xxx, offset, valread);
 255 }
 256 EXPORT_SYMBOL(mc13xxx_reg_rmw);
 257
 258 int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
 259 {
 260         int ret;
 261         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 262         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 263         u32 mask;
 264
 265         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 266                 return -EINVAL;
 267
 268         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 269         if (ret)
 270                 return ret;
 271
 272         if (mask & irqbit)
 273                 /* already masked */
 274                 return 0;
 275
 276         return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit);
 277 }
 278 EXPORT_SYMBOL(mc13xxx_irq_mask);
 279
 280 int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
 281 {
 282         int ret;
 283         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 284         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 285         u32 mask;
 286
 287         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 288                 return -EINVAL;
 289
 290         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 291         if (ret)
 292                 return ret;
 293
 294         if (!(mask & irqbit))
 295                 /* already unmasked */
 296                 return 0;
 297
 298         return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit);
 299 }
 300 EXPORT_SYMBOL(mc13xxx_irq_unmask);
 301
 302 int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
 303                 int *enabled, int *pending)
 304 {
 305         int ret;
 306         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 307         unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
 308         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 309
 310         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 311                 return -EINVAL;
 312
 313         if (enabled) {
 314                 u32 mask;
 315
 316                 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 317                 if (ret)
 318                         return ret;
 319
 320                 *enabled = mask & irqbit;
 321         }
 322
 323         if (pending) {
 324                 u32 stat;
 325
 326                 ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
 327                 if (ret)
 328                         return ret;
 329
 330                 *pending = stat & irqbit;
 331         }
 332
 333         return 0;
 334 }
 335 EXPORT_SYMBOL(mc13xxx_irq_status);
 336
 337 int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq)
 338 {
 339         unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
 340         unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
 341
 342         BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ);
 343
 344         return mc13xxx_reg_write(mc13xxx, offstat, val);
 345 }
 346 EXPORT_SYMBOL(mc13xxx_irq_ack);
 347
 348 int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq,
 349                 irq_handler_t handler, const char *name, void *dev)
 350 {
 351         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 352         BUG_ON(!handler);
 353
 354         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 355                 return -EINVAL;
 356
 357         if (mc13xxx->irqhandler[irq])
 358                 return -EBUSY;
 359
 360         mc13xxx->irqhandler[irq] = handler;
 361         mc13xxx->irqdata[irq] = dev;
 362
 363         return 0;
 364 }
 365 EXPORT_SYMBOL(mc13xxx_irq_request_nounmask);
 366
 367 int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
 368                 irq_handler_t handler, const char *name, void *dev)
 369 {
 370         int ret;
 371
 372         ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev);
 373         if (ret)
 374                 return ret;
 375
 376         ret = mc13xxx_irq_unmask(mc13xxx, irq);
 377         if (ret) {
 378                 mc13xxx->irqhandler[irq] = NULL;
 379                 mc13xxx->irqdata[irq] = NULL;
 380                 return ret;
 381         }
 382
 383         return 0;
 384 }
 385 EXPORT_SYMBOL(mc13xxx_irq_request);
 386
 387 int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
 388 {
 389         int ret;
 390         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 391
 392         if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] ||
 393                         mc13xxx->irqdata[irq] != dev)
 394                 return -EINVAL;
 395
 396         ret = mc13xxx_irq_mask(mc13xxx, irq);
 397         if (ret)
 398                 return ret;
 399
 400         mc13xxx->irqhandler[irq] = NULL;
 401         mc13xxx->irqdata[irq] = NULL;
 402
 403         return 0;
 404 }
 405 EXPORT_SYMBOL(mc13xxx_irq_free);
 406
 407 static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq)
 408 {
 409         return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]);
 410 }
 411
 412 /*
 413  * returns: number of handled irqs or negative error
 414  * locking: holds mc13xxx->lock
 415  */
 416 static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
 417                 unsigned int offstat, unsigned int offmask, int baseirq)
 418 {
 419         u32 stat, mask;
 420         int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
 421         int num_handled = 0;
 422
 423         if (ret)
 424                 return ret;
 425
 426         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 427         if (ret)
 428                 return ret;
 429
 430         while (stat & ~mask) {
 431                 int irq = __ffs(stat & ~mask);
 432
 433                 stat &= ~(1 << irq);
 434
 435                 if (likely(mc13xxx->irqhandler[baseirq + irq])) {
 436                         irqreturn_t handled;
 437
 438                         handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq);
 439                         if (handled == IRQ_HANDLED)
 440                                 num_handled++;
 441                 } else {
 442                         dev_err(&mc13xxx->spidev->dev,
 443                                         "BUG: irq %u but no handler\n",
 444                                         baseirq + irq);
 445
 446                         mask |= 1 << irq;
 447
 448                         ret = mc13xxx_reg_write(mc13xxx, offmask, mask);
 449                 }
 450         }
 451
 452         return num_handled;
 453 }
 454
 455 static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
 456 {
 457         struct mc13xxx *mc13xxx = data;
 458         irqreturn_t ret;
 459         int handled = 0;
 460
 461         mc13xxx_lock(mc13xxx);
 462
 463         ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0,
 464                         MC13XXX_IRQMASK0, 0);
 465         if (ret > 0)
 466                 handled = 1;
 467
 468         ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1,
 469                         MC13XXX_IRQMASK1, 24);
 470         if (ret > 0)
 471                 handled = 1;
 472
 473         mc13xxx_unlock(mc13xxx);
 474
 475         return IRQ_RETVAL(handled);
 476 }
 477
 478 enum mc13xxx_id {
 479         MC13XXX_ID_MC13783,
 480         MC13XXX_ID_MC13892,
 481         MC13XXX_ID_INVALID,
 482 };
 483
 484 static const char *mc13xxx_chipname[] = {
 485         [MC13XXX_ID_MC13783] = "mc13783",
 486         [MC13XXX_ID_MC13892] = "mc13892",
 487 };
 488
 489 #define maskval(reg, mask)      (((reg) & (mask)) >> __ffs(mask))
 490 static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
 491 {
 492         u32 icid;
 493         u32 revision;
 494         const char *name;
 495         int ret;
 496
 497         ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
 498         if (ret)
 499                 return ret;
 500
 501         icid = (icid >> 6) & 0x7;
 502
 503         switch (icid) {
 504         case 2:
 505                 *id = MC13XXX_ID_MC13783;
 506                 name = "mc13783";
 507                 break;
 508         case 7:
 509                 *id = MC13XXX_ID_MC13892;
 510                 name = "mc13892";
 511                 break;
 512         default:
 513                 *id = MC13XXX_ID_INVALID;
 514                 break;
 515         }
 516
 517         if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) {
 518                 ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
 519                 if (ret)
 520                         return ret;
 521
 522                 dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, "
 523                                 "fin: %d, fab: %d, icid: %d/%d\n",
 524                                 mc13xxx_chipname[*id],
 525                                 maskval(revision, MC13XXX_REVISION_REVFULL),
 526                                 maskval(revision, MC13XXX_REVISION_REVMETAL),
 527                                 maskval(revision, MC13XXX_REVISION_FIN),
 528                                 maskval(revision, MC13XXX_REVISION_FAB),
 529                                 maskval(revision, MC13XXX_REVISION_ICID),
 530                                 maskval(revision, MC13XXX_REVISION_ICIDCODE));
 531         }
 532
 533         if (*id != MC13XXX_ID_INVALID) {
 534                 const struct spi_device_id *devid =
 535                         spi_get_device_id(mc13xxx->spidev);
 536                 if (!devid || devid->driver_data != *id)
 537                         dev_warn(&mc13xxx->spidev->dev, "device id doesn't "
 538                                         "match auto detection!\n");
 539         }
 540
 541         return 0;
 542 }
 543
 544 static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
 545 {
 546         const struct spi_device_id *devid =
 547                 spi_get_device_id(mc13xxx->spidev);
 548
 549         if (!devid)
 550                 return NULL;
 551
 552         return mc13xxx_chipname[devid->driver_data];
 553 }
 554
 555 int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
 556 {
 557         return mc13xxx->flags;
 558 }
 559 EXPORT_SYMBOL(mc13xxx_get_flags);
 560
 561 #define MC13XXX_ADC1_CHAN0_SHIFT        5
 562 #define MC13XXX_ADC1_CHAN1_SHIFT        8
 563
 564 struct mc13xxx_adcdone_data {
 565         struct mc13xxx *mc13xxx;
 566         struct completion done;
 567 };
 568
 569 static irqreturn_t mc13xxx_handler_adcdone(int irq, void *data)
 570 {
 571         struct mc13xxx_adcdone_data *adcdone_data = data;
 572
 573         mc13xxx_irq_ack(adcdone_data->mc13xxx, irq);
 574
 575         complete_all(&adcdone_data->done);
 576
 577         return IRQ_HANDLED;
 578 }
 579
 580 #define MC13XXX_ADC_WORKING (1 << 0)
 581
 582 int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
 583                 unsigned int channel, unsigned int *sample)
 584 {
 585         u32 adc0, adc1, old_adc0;
 586         int i, ret;
 587         struct mc13xxx_adcdone_data adcdone_data = {
 588                 .mc13xxx = mc13xxx,
 589         };
 590         init_completion(&adcdone_data.done);
 591
 592         dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__);
 593
 594         mc13xxx_lock(mc13xxx);
 595
 596         if (mc13xxx->adcflags & MC13XXX_ADC_WORKING) {
 597                 ret = -EBUSY;
 598                 goto out;
 599         }
 600
 601         mc13xxx->adcflags |= MC13XXX_ADC_WORKING;
 602
 603         mc13xxx_reg_read(mc13xxx, MC13XXX_ADC0, &old_adc0);
 604
 605         adc0 = MC13XXX_ADC0_ADINC1 | MC13XXX_ADC0_ADINC2;
 606         adc1 = MC13XXX_ADC1_ADEN | MC13XXX_ADC1_ADTRIGIGN | MC13XXX_ADC1_ASC;
 607
 608         if (channel > 7)
 609                 adc1 |= MC13XXX_ADC1_ADSEL;
 610
 611         switch (mode) {
 612         case MC13XXX_ADC_MODE_TS:
 613                 adc0 |= MC13XXX_ADC0_ADREFEN | MC13XXX_ADC0_TSMOD0 |
 614                         MC13XXX_ADC0_TSMOD1;
 615                 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
 616                 break;
 617
 618         case MC13XXX_ADC_MODE_SINGLE_CHAN:
 619                 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
 620                 adc1 |= (channel & 0x7) << MC13XXX_ADC1_CHAN0_SHIFT;
 621                 adc1 |= MC13XXX_ADC1_RAND;
 622                 break;
 623
 624         case MC13XXX_ADC_MODE_MULT_CHAN:
 625                 adc0 |= old_adc0 & MC13XXX_ADC0_CONFIG_MASK;
 626                 adc1 |= 4 << MC13XXX_ADC1_CHAN1_SHIFT;
 627                 break;
 628
 629         default:
 630                 mc13xxx_unlock(mc13xxx);
 631                 return -EINVAL;
 632         }
 633
 634         dev_dbg(&mc13xxx->spidev->dev, "%s: request irq\n", __func__);
 635         mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
 636                         mc13xxx_handler_adcdone, __func__, &adcdone_data);
 637         mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE);
 638
 639         mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, adc0);
 640         mc13xxx_reg_write(mc13xxx, MC13XXX_ADC1, adc1);
 641
 642         mc13xxx_unlock(mc13xxx);
 643
 644         ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
 645
 646         if (!ret)
 647                 ret = -ETIMEDOUT;
 648
 649         mc13xxx_lock(mc13xxx);
 650
 651         mc13xxx_irq_free(mc13xxx, MC13XXX_IRQ_ADCDONE, &adcdone_data);
 652
 653         if (ret > 0)
 654                 for (i = 0; i < 4; ++i) {
 655                         ret = mc13xxx_reg_read(mc13xxx,
 656                                         MC13XXX_ADC2, &sample[i]);
 657                         if (ret)
 658                                 break;
 659                 }
 660
 661         if (mode == MC13XXX_ADC_MODE_TS)
 662                 /* restore TSMOD */
 663                 mc13xxx_reg_write(mc13xxx, MC13XXX_ADC0, old_adc0);
 664
 665         mc13xxx->adcflags &= ~MC13XXX_ADC_WORKING;
 666 out:
 667         mc13xxx_unlock(mc13xxx);
 668
 669         return ret;
 670 }
 671 EXPORT_SYMBOL_GPL(mc13xxx_adc_do_conversion);
 672
 673 static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
 674                 const char *format, void *pdata, size_t pdata_size)
 675 {
 676         char buf[30];
 677         const char *name = mc13xxx_get_chipname(mc13xxx);
 678
 679         struct mfd_cell cell = {
 680                 .platform_data = pdata,
 681                 .pdata_size = pdata_size,
 682         };
 683
 684         /* there is no asnprintf in the kernel :-( */
 685         if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
 686                 return -E2BIG;
 687
 688         cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
 689         if (!cell.name)
 690                 return -ENOMEM;
 691
 692         return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0);
 693 }
 694
 695 static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
 696 {
 697         return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
 698 }
 699
 700 #ifdef CONFIG_OF
 701 static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
 702 {
 703         struct device_node *np = mc13xxx->spidev->dev.of_node;
 704
 705         if (!np)
 706                 return -ENODEV;
 707
 708         if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL))
 709                 mc13xxx->flags |= MC13XXX_USE_ADC;
 710
 711         if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL))
 712                 mc13xxx->flags |= MC13XXX_USE_CODEC;
 713
 714         if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL))
 715                 mc13xxx->flags |= MC13XXX_USE_RTC;
 716
 717         if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL))
 718                 mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
 719
 720         return 0;
 721 }
 722 #else
 723 static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
 724 {
 725         return -ENODEV;
 726 }
 727 #endif
 728
 729 static const struct spi_device_id mc13xxx_device_id[] = {
 730         {
 731                 .name = "mc13783",
 732                 .driver_data = MC13XXX_ID_MC13783,
 733         }, {
 734                 .name = "mc13892",
 735                 .driver_data = MC13XXX_ID_MC13892,
 736         }, {
 737                 /* sentinel */
 738         }
 739 };
 740 MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
 741
 742 static const struct of_device_id mc13xxx_dt_ids[] = {
 743         { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
 744         { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
 745         { /* sentinel */ }
 746 };
 747 MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
 748
 749 static int mc13xxx_probe(struct spi_device *spi)
 750 {
 751         const struct of_device_id *of_id;
 752         struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
 753         struct mc13xxx *mc13xxx;
 754         struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
 755         enum mc13xxx_id id;
 756         int ret;
 757
 758         of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
 759         if (of_id)
 760                 sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
 761
 762         mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
 763         if (!mc13xxx)
 764                 return -ENOMEM;
 765
 766         dev_set_drvdata(&spi->dev, mc13xxx);
 767         spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
 768         spi->bits_per_word = 32;
 769         spi_setup(spi);
 770
 771         mc13xxx->spidev = spi;
 772
 773         mutex_init(&mc13xxx->lock);
 774         mc13xxx_lock(mc13xxx);
 775
 776         ret = mc13xxx_identify(mc13xxx, &id);
 777         if (ret || id == MC13XXX_ID_INVALID)
 778                 goto err_revision;
 779
 780         /* mask all irqs */
 781         ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
 782         if (ret)
 783                 goto err_mask;
 784
 785         ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
 786         if (ret)
 787                 goto err_mask;
 788
 789         ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread,
 790                         IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
 791
 792         if (ret) {
 793 err_mask:
 794 err_revision:
 795                 mc13xxx_unlock(mc13xxx);
 796                 dev_set_drvdata(&spi->dev, NULL);
 797                 kfree(mc13xxx);
 798                 return ret;
 799         }
 800
 801         mc13xxx_unlock(mc13xxx);
 802
 803         if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
 804                 mc13xxx->flags = pdata->flags;
 805
 806         if (mc13xxx->flags & MC13XXX_USE_ADC)
 807                 mc13xxx_add_subdevice(mc13xxx, "%s-adc");
 808
 809         if (mc13xxx->flags & MC13XXX_USE_CODEC)
 810                 mc13xxx_add_subdevice(mc13xxx, "%s-codec");
 811
 812         if (mc13xxx->flags & MC13XXX_USE_RTC)
 813                 mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
 814
 815         if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
 816                 mc13xxx_add_subdevice(mc13xxx, "%s-ts");
 817
 818         if (pdata) {
 819                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
 820                         &pdata->regulators, sizeof(pdata->regulators));
 821                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
 822                                 pdata->leds, sizeof(*pdata->leds));
 823                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
 824                                 pdata->buttons, sizeof(*pdata->buttons));
 825         } else {
 826                 mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
 827                 mc13xxx_add_subdevice(mc13xxx, "%s-led");
 828                 mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
 829         }
 830
 831         return 0;
 832 }
 833
 834 static int __devexit mc13xxx_remove(struct spi_device *spi)
 835 {
 836         struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
 837
 838         free_irq(mc13xxx->spidev->irq, mc13xxx);
 839
 840         mfd_remove_devices(&spi->dev);
 841
 842         kfree(mc13xxx);
 843
 844         return 0;
 845 }
 846
 847 static struct spi_driver mc13xxx_driver = {
 848         .id_table = mc13xxx_device_id,
 849         .driver = {
 850                 .name = "mc13xxx",
 851                 .owner = THIS_MODULE,
 852                 .of_match_table = mc13xxx_dt_ids,
 853         },
 854         .probe = mc13xxx_probe,
 855         .remove = __devexit_p(mc13xxx_remove),
 856 };
 857
 858 static int __init mc13xxx_init(void)
 859 {
 860         return spi_register_driver(&mc13xxx_driver);
 861 }
 862 subsys_initcall(mc13xxx_init);
 863
 864 static void __exit mc13xxx_exit(void)
 865 {
 866         spi_unregister_driver(&mc13xxx_driver);
 867 }
 868 module_exit(mc13xxx_exit);
 869
 870 MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
 871 MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
 872 MODULE_LICENSE("GPL v2");