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
  22 struct mc13xxx {
  23         struct spi_device *spidev;
  24         struct mutex lock;
  25         int irq;
  26
  27         irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
  28         void *irqdata[MC13XXX_NUM_IRQ];
  29 };
  30
  31 struct mc13783 {
  32         struct mc13xxx mc13xxx;
  33
  34         int adcflags;
  35 };
  36
  37 struct mc13xxx *mc13783_to_mc13xxx(struct mc13783 *mc13783)
  38 {
  39         return &mc13783->mc13xxx;
  40 }
  41 EXPORT_SYMBOL(mc13783_to_mc13xxx);
  42
  43 #define MC13XXX_IRQSTAT0        0
  44 #define MC13XXX_IRQSTAT0_ADCDONEI       (1 << 0)
  45 #define MC13XXX_IRQSTAT0_ADCBISDONEI    (1 << 1)
  46 #define MC13XXX_IRQSTAT0_TSI            (1 << 2)
  47 #define MC13783_IRQSTAT0_WHIGHI         (1 << 3)
  48 #define MC13783_IRQSTAT0_WLOWI          (1 << 4)
  49 #define MC13XXX_IRQSTAT0_CHGDETI        (1 << 6)
  50 #define MC13783_IRQSTAT0_CHGOVI         (1 << 7)
  51 #define MC13XXX_IRQSTAT0_CHGREVI        (1 << 8)
  52 #define MC13XXX_IRQSTAT0_CHGSHORTI      (1 << 9)
  53 #define MC13XXX_IRQSTAT0_CCCVI          (1 << 10)
  54 #define MC13XXX_IRQSTAT0_CHGCURRI       (1 << 11)
  55 #define MC13XXX_IRQSTAT0_BPONI          (1 << 12)
  56 #define MC13XXX_IRQSTAT0_LOBATLI        (1 << 13)
  57 #define MC13XXX_IRQSTAT0_LOBATHI        (1 << 14)
  58 #define MC13783_IRQSTAT0_UDPI           (1 << 15)
  59 #define MC13783_IRQSTAT0_USBI           (1 << 16)
  60 #define MC13783_IRQSTAT0_IDI            (1 << 19)
  61 #define MC13783_IRQSTAT0_SE1I           (1 << 21)
  62 #define MC13783_IRQSTAT0_CKDETI         (1 << 22)
  63 #define MC13783_IRQSTAT0_UDMI           (1 << 23)
  64
  65 #define MC13XXX_IRQMASK0        1
  66 #define MC13XXX_IRQMASK0_ADCDONEM       MC13XXX_IRQSTAT0_ADCDONEI
  67 #define MC13XXX_IRQMASK0_ADCBISDONEM    MC13XXX_IRQSTAT0_ADCBISDONEI
  68 #define MC13XXX_IRQMASK0_TSM            MC13XXX_IRQSTAT0_TSI
  69 #define MC13783_IRQMASK0_WHIGHM         MC13783_IRQSTAT0_WHIGHI
  70 #define MC13783_IRQMASK0_WLOWM          MC13783_IRQSTAT0_WLOWI
  71 #define MC13XXX_IRQMASK0_CHGDETM        MC13XXX_IRQSTAT0_CHGDETI
  72 #define MC13783_IRQMASK0_CHGOVM         MC13783_IRQSTAT0_CHGOVI
  73 #define MC13XXX_IRQMASK0_CHGREVM        MC13XXX_IRQSTAT0_CHGREVI
  74 #define MC13XXX_IRQMASK0_CHGSHORTM      MC13XXX_IRQSTAT0_CHGSHORTI
  75 #define MC13XXX_IRQMASK0_CCCVM          MC13XXX_IRQSTAT0_CCCVI
  76 #define MC13XXX_IRQMASK0_CHGCURRM       MC13XXX_IRQSTAT0_CHGCURRI
  77 #define MC13XXX_IRQMASK0_BPONM          MC13XXX_IRQSTAT0_BPONI
  78 #define MC13XXX_IRQMASK0_LOBATLM        MC13XXX_IRQSTAT0_LOBATLI
  79 #define MC13XXX_IRQMASK0_LOBATHM        MC13XXX_IRQSTAT0_LOBATHI
  80 #define MC13783_IRQMASK0_UDPM           MC13783_IRQSTAT0_UDPI
  81 #define MC13783_IRQMASK0_USBM           MC13783_IRQSTAT0_USBI
  82 #define MC13783_IRQMASK0_IDM            MC13783_IRQSTAT0_IDI
  83 #define MC13783_IRQMASK0_SE1M           MC13783_IRQSTAT0_SE1I
  84 #define MC13783_IRQMASK0_CKDETM         MC13783_IRQSTAT0_CKDETI
  85 #define MC13783_IRQMASK0_UDMM           MC13783_IRQSTAT0_UDMI
  86
  87 #define MC13XXX_IRQSTAT1        3
  88 #define MC13XXX_IRQSTAT1_1HZI           (1 << 0)
  89 #define MC13XXX_IRQSTAT1_TODAI          (1 << 1)
  90 #define MC13783_IRQSTAT1_ONOFD1I        (1 << 3)
  91 #define MC13783_IRQSTAT1_ONOFD2I        (1 << 4)
  92 #define MC13783_IRQSTAT1_ONOFD3I        (1 << 5)
  93 #define MC13XXX_IRQSTAT1_SYSRSTI        (1 << 6)
  94 #define MC13XXX_IRQSTAT1_RTCRSTI        (1 << 7)
  95 #define MC13XXX_IRQSTAT1_PCI            (1 << 8)
  96 #define MC13XXX_IRQSTAT1_WARMI          (1 << 9)
  97 #define MC13XXX_IRQSTAT1_MEMHLDI        (1 << 10)
  98 #define MC13783_IRQSTAT1_PWRRDYI        (1 << 11)
  99 #define MC13XXX_IRQSTAT1_THWARNLI       (1 << 12)
 100 #define MC13XXX_IRQSTAT1_THWARNHI       (1 << 13)
 101 #define MC13XXX_IRQSTAT1_CLKI           (1 << 14)
 102 #define MC13783_IRQSTAT1_SEMAFI         (1 << 15)
 103 #define MC13783_IRQSTAT1_MC2BI          (1 << 17)
 104 #define MC13783_IRQSTAT1_HSDETI         (1 << 18)
 105 #define MC13783_IRQSTAT1_HSLI           (1 << 19)
 106 #define MC13783_IRQSTAT1_ALSPTHI        (1 << 20)
 107 #define MC13783_IRQSTAT1_AHSSHORTI      (1 << 21)
 108
 109 #define MC13XXX_IRQMASK1        4
 110 #define MC13XXX_IRQMASK1_1HZM           MC13XXX_IRQSTAT1_1HZI
 111 #define MC13XXX_IRQMASK1_TODAM          MC13XXX_IRQSTAT1_TODAI
 112 #define MC13783_IRQMASK1_ONOFD1M        MC13783_IRQSTAT1_ONOFD1I
 113 #define MC13783_IRQMASK1_ONOFD2M        MC13783_IRQSTAT1_ONOFD2I
 114 #define MC13783_IRQMASK1_ONOFD3M        MC13783_IRQSTAT1_ONOFD3I
 115 #define MC13XXX_IRQMASK1_SYSRSTM        MC13XXX_IRQSTAT1_SYSRSTI
 116 #define MC13XXX_IRQMASK1_RTCRSTM        MC13XXX_IRQSTAT1_RTCRSTI
 117 #define MC13XXX_IRQMASK1_PCM            MC13XXX_IRQSTAT1_PCI
 118 #define MC13XXX_IRQMASK1_WARMM          MC13XXX_IRQSTAT1_WARMI
 119 #define MC13XXX_IRQMASK1_MEMHLDM        MC13XXX_IRQSTAT1_MEMHLDI
 120 #define MC13783_IRQMASK1_PWRRDYM        MC13783_IRQSTAT1_PWRRDYI
 121 #define MC13XXX_IRQMASK1_THWARNLM       MC13XXX_IRQSTAT1_THWARNLI
 122 #define MC13XXX_IRQMASK1_THWARNHM       MC13XXX_IRQSTAT1_THWARNHI
 123 #define MC13XXX_IRQMASK1_CLKM           MC13XXX_IRQSTAT1_CLKI
 124 #define MC13783_IRQMASK1_SEMAFM         MC13783_IRQSTAT1_SEMAFI
 125 #define MC13783_IRQMASK1_MC2BM          MC13783_IRQSTAT1_MC2BI
 126 #define MC13783_IRQMASK1_HSDETM         MC13783_IRQSTAT1_HSDETI
 127 #define MC13783_IRQMASK1_HSLM           MC13783_IRQSTAT1_HSLI
 128 #define MC13783_IRQMASK1_ALSPTHM        MC13783_IRQSTAT1_ALSPTHI
 129 #define MC13783_IRQMASK1_AHSSHORTM      MC13783_IRQSTAT1_AHSSHORTI
 130
 131 #define MC13XXX_REVISION        7
 132 #define MC13XXX_REVISION_REVMETAL       (0x07 <<  0)
 133 #define MC13XXX_REVISION_REVFULL        (0x03 <<  3)
 134 #define MC13XXX_REVISION_ICID           (0x07 <<  6)
 135 #define MC13XXX_REVISION_FIN            (0x03 <<  9)
 136 #define MC13XXX_REVISION_FAB            (0x03 << 11)
 137 #define MC13XXX_REVISION_ICIDCODE       (0x3f << 13)
 138
 139 #define MC13783_ADC1            44
 140 #define MC13783_ADC1_ADEN               (1 << 0)
 141 #define MC13783_ADC1_RAND               (1 << 1)
 142 #define MC13783_ADC1_ADSEL              (1 << 3)
 143 #define MC13783_ADC1_ASC                (1 << 20)
 144 #define MC13783_ADC1_ADTRIGIGN          (1 << 21)
 145
 146 #define MC13783_ADC2            45
 147
 148 #define MC13XXX_NUMREGS 0x3f
 149
 150 void mc13xxx_lock(struct mc13xxx *mc13xxx)
 151 {
 152         if (!mutex_trylock(&mc13xxx->lock)) {
 153                 dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n",
 154                                 __func__, __builtin_return_address(0));
 155
 156                 mutex_lock(&mc13xxx->lock);
 157         }
 158         dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
 159                         __func__, __builtin_return_address(0));
 160 }
 161 EXPORT_SYMBOL(mc13xxx_lock);
 162
 163 void mc13xxx_unlock(struct mc13xxx *mc13xxx)
 164 {
 165         dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
 166                         __func__, __builtin_return_address(0));
 167         mutex_unlock(&mc13xxx->lock);
 168 }
 169 EXPORT_SYMBOL(mc13xxx_unlock);
 170
 171 #define MC13XXX_REGOFFSET_SHIFT 25
 172 int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
 173 {
 174         struct spi_transfer t;
 175         struct spi_message m;
 176         int ret;
 177
 178         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 179
 180         if (offset > MC13XXX_NUMREGS)
 181                 return -EINVAL;
 182
 183         *val = offset << MC13XXX_REGOFFSET_SHIFT;
 184
 185         memset(&t, 0, sizeof(t));
 186
 187         t.tx_buf = val;
 188         t.rx_buf = val;
 189         t.len = sizeof(u32);
 190
 191         spi_message_init(&m);
 192         spi_message_add_tail(&t, &m);
 193
 194         ret = spi_sync(mc13xxx->spidev, &m);
 195
 196         /* error in message.status implies error return from spi_sync */
 197         BUG_ON(!ret && m.status);
 198
 199         if (ret)
 200                 return ret;
 201
 202         *val &= 0xffffff;
 203
 204         dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
 205
 206         return 0;
 207 }
 208 EXPORT_SYMBOL(mc13xxx_reg_read);
 209
 210 int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
 211 {
 212         u32 buf;
 213         struct spi_transfer t;
 214         struct spi_message m;
 215         int ret;
 216
 217         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 218
 219         dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val);
 220
 221         if (offset > MC13XXX_NUMREGS || val > 0xffffff)
 222                 return -EINVAL;
 223
 224         buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val;
 225
 226         memset(&t, 0, sizeof(t));
 227
 228         t.tx_buf = &buf;
 229         t.rx_buf = &buf;
 230         t.len = sizeof(u32);
 231
 232         spi_message_init(&m);
 233         spi_message_add_tail(&t, &m);
 234
 235         ret = spi_sync(mc13xxx->spidev, &m);
 236
 237         BUG_ON(!ret && m.status);
 238
 239         if (ret)
 240                 return ret;
 241
 242         return 0;
 243 }
 244 EXPORT_SYMBOL(mc13xxx_reg_write);
 245
 246 int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
 247                 u32 mask, u32 val)
 248 {
 249         int ret;
 250         u32 valread;
 251
 252         BUG_ON(val & ~mask);
 253
 254         ret = mc13xxx_reg_read(mc13xxx, offset, &valread);
 255         if (ret)
 256                 return ret;
 257
 258         valread = (valread & ~mask) | val;
 259
 260         return mc13xxx_reg_write(mc13xxx, offset, valread);
 261 }
 262 EXPORT_SYMBOL(mc13xxx_reg_rmw);
 263
 264 int mc13xxx_irq_mask(struct mc13xxx *mc13xxx, int irq)
 265 {
 266         int ret;
 267         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 268         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 269         u32 mask;
 270
 271         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 272                 return -EINVAL;
 273
 274         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 275         if (ret)
 276                 return ret;
 277
 278         if (mask & irqbit)
 279                 /* already masked */
 280                 return 0;
 281
 282         return mc13xxx_reg_write(mc13xxx, offmask, mask | irqbit);
 283 }
 284 EXPORT_SYMBOL(mc13xxx_irq_mask);
 285
 286 int mc13xxx_irq_unmask(struct mc13xxx *mc13xxx, int irq)
 287 {
 288         int ret;
 289         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 290         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 291         u32 mask;
 292
 293         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 294                 return -EINVAL;
 295
 296         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 297         if (ret)
 298                 return ret;
 299
 300         if (!(mask & irqbit))
 301                 /* already unmasked */
 302                 return 0;
 303
 304         return mc13xxx_reg_write(mc13xxx, offmask, mask & ~irqbit);
 305 }
 306 EXPORT_SYMBOL(mc13xxx_irq_unmask);
 307
 308 int mc13xxx_irq_status(struct mc13xxx *mc13xxx, int irq,
 309                 int *enabled, int *pending)
 310 {
 311         int ret;
 312         unsigned int offmask = irq < 24 ? MC13XXX_IRQMASK0 : MC13XXX_IRQMASK1;
 313         unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
 314         u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
 315
 316         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 317                 return -EINVAL;
 318
 319         if (enabled) {
 320                 u32 mask;
 321
 322                 ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 323                 if (ret)
 324                         return ret;
 325
 326                 *enabled = mask & irqbit;
 327         }
 328
 329         if (pending) {
 330                 u32 stat;
 331
 332                 ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
 333                 if (ret)
 334                         return ret;
 335
 336                 *pending = stat & irqbit;
 337         }
 338
 339         return 0;
 340 }
 341 EXPORT_SYMBOL(mc13xxx_irq_status);
 342
 343 int mc13xxx_irq_ack(struct mc13xxx *mc13xxx, int irq)
 344 {
 345         unsigned int offstat = irq < 24 ? MC13XXX_IRQSTAT0 : MC13XXX_IRQSTAT1;
 346         unsigned int val = 1 << (irq < 24 ? irq : irq - 24);
 347
 348         BUG_ON(irq < 0 || irq >= MC13XXX_NUM_IRQ);
 349
 350         return mc13xxx_reg_write(mc13xxx, offstat, val);
 351 }
 352 EXPORT_SYMBOL(mc13xxx_irq_ack);
 353
 354 int mc13xxx_irq_request_nounmask(struct mc13xxx *mc13xxx, int irq,
 355                 irq_handler_t handler, const char *name, void *dev)
 356 {
 357         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 358         BUG_ON(!handler);
 359
 360         if (irq < 0 || irq >= MC13XXX_NUM_IRQ)
 361                 return -EINVAL;
 362
 363         if (mc13xxx->irqhandler[irq])
 364                 return -EBUSY;
 365
 366         mc13xxx->irqhandler[irq] = handler;
 367         mc13xxx->irqdata[irq] = dev;
 368
 369         return 0;
 370 }
 371 EXPORT_SYMBOL(mc13xxx_irq_request_nounmask);
 372
 373 int mc13xxx_irq_request(struct mc13xxx *mc13xxx, int irq,
 374                 irq_handler_t handler, const char *name, void *dev)
 375 {
 376         int ret;
 377
 378         ret = mc13xxx_irq_request_nounmask(mc13xxx, irq, handler, name, dev);
 379         if (ret)
 380                 return ret;
 381
 382         ret = mc13xxx_irq_unmask(mc13xxx, irq);
 383         if (ret) {
 384                 mc13xxx->irqhandler[irq] = NULL;
 385                 mc13xxx->irqdata[irq] = NULL;
 386                 return ret;
 387         }
 388
 389         return 0;
 390 }
 391 EXPORT_SYMBOL(mc13xxx_irq_request);
 392
 393 int mc13xxx_irq_free(struct mc13xxx *mc13xxx, int irq, void *dev)
 394 {
 395         int ret;
 396         BUG_ON(!mutex_is_locked(&mc13xxx->lock));
 397
 398         if (irq < 0 || irq >= MC13XXX_NUM_IRQ || !mc13xxx->irqhandler[irq] ||
 399                         mc13xxx->irqdata[irq] != dev)
 400                 return -EINVAL;
 401
 402         ret = mc13xxx_irq_mask(mc13xxx, irq);
 403         if (ret)
 404                 return ret;
 405
 406         mc13xxx->irqhandler[irq] = NULL;
 407         mc13xxx->irqdata[irq] = NULL;
 408
 409         return 0;
 410 }
 411 EXPORT_SYMBOL(mc13xxx_irq_free);
 412
 413 static inline irqreturn_t mc13xxx_irqhandler(struct mc13xxx *mc13xxx, int irq)
 414 {
 415         return mc13xxx->irqhandler[irq](irq, mc13xxx->irqdata[irq]);
 416 }
 417
 418 /*
 419  * returns: number of handled irqs or negative error
 420  * locking: holds mc13xxx->lock
 421  */
 422 static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
 423                 unsigned int offstat, unsigned int offmask, int baseirq)
 424 {
 425         u32 stat, mask;
 426         int ret = mc13xxx_reg_read(mc13xxx, offstat, &stat);
 427         int num_handled = 0;
 428
 429         if (ret)
 430                 return ret;
 431
 432         ret = mc13xxx_reg_read(mc13xxx, offmask, &mask);
 433         if (ret)
 434                 return ret;
 435
 436         while (stat & ~mask) {
 437                 int irq = __ffs(stat & ~mask);
 438
 439                 stat &= ~(1 << irq);
 440
 441                 if (likely(mc13xxx->irqhandler[baseirq + irq])) {
 442                         irqreturn_t handled;
 443
 444                         handled = mc13xxx_irqhandler(mc13xxx, baseirq + irq);
 445                         if (handled == IRQ_HANDLED)
 446                                 num_handled++;
 447                 } else {
 448                         dev_err(&mc13xxx->spidev->dev,
 449                                         "BUG: irq %u but no handler\n",
 450                                         baseirq + irq);
 451
 452                         mask |= 1 << irq;
 453
 454                         ret = mc13xxx_reg_write(mc13xxx, offmask, mask);
 455                 }
 456         }
 457
 458         return num_handled;
 459 }
 460
 461 static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
 462 {
 463         struct mc13xxx *mc13xxx = data;
 464         irqreturn_t ret;
 465         int handled = 0;
 466
 467         mc13xxx_lock(mc13xxx);
 468
 469         ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT0,
 470                         MC13XXX_IRQMASK0, 0);
 471         if (ret > 0)
 472                 handled = 1;
 473
 474         ret = mc13xxx_irq_handle(mc13xxx, MC13XXX_IRQSTAT1,
 475                         MC13XXX_IRQMASK1, 24);
 476         if (ret > 0)
 477                 handled = 1;
 478
 479         mc13xxx_unlock(mc13xxx);
 480
 481         return IRQ_RETVAL(handled);
 482 }
 483
 484 enum mc13xxx_id {
 485         MC13XXX_ID_MC13783,
 486         MC13XXX_ID_MC13892,
 487         MC13XXX_ID_INVALID,
 488 };
 489
 490 const char *mc13xxx_chipname[] = {
 491         [MC13XXX_ID_MC13783] = "mc13783",
 492         [MC13XXX_ID_MC13892] = "mc13892",
 493 };
 494
 495 #define maskval(reg, mask)      (((reg) & (mask)) >> __ffs(mask))
 496 static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
 497 {
 498         u32 icid;
 499         u32 revision;
 500         const char *name;
 501         int ret;
 502
 503         ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
 504         if (ret)
 505                 return ret;
 506
 507         icid = (icid >> 6) & 0x7;
 508
 509         switch (icid) {
 510         case 2:
 511                 *id = MC13XXX_ID_MC13783;
 512                 name = "mc13783";
 513                 break;
 514         case 7:
 515                 *id = MC13XXX_ID_MC13892;
 516                 name = "mc13892";
 517                 break;
 518         default:
 519                 *id = MC13XXX_ID_INVALID;
 520                 break;
 521         }
 522
 523         if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) {
 524                 ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
 525                 if (ret)
 526                         return ret;
 527
 528                 dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, "
 529                                 "fin: %d, fab: %d, icid: %d/%d\n",
 530                                 mc13xxx_chipname[*id],
 531                                 maskval(revision, MC13XXX_REVISION_REVFULL),
 532                                 maskval(revision, MC13XXX_REVISION_REVMETAL),
 533                                 maskval(revision, MC13XXX_REVISION_FIN),
 534                                 maskval(revision, MC13XXX_REVISION_FAB),
 535                                 maskval(revision, MC13XXX_REVISION_ICID),
 536                                 maskval(revision, MC13XXX_REVISION_ICIDCODE));
 537         }
 538
 539         if (*id != MC13XXX_ID_INVALID) {
 540                 const struct spi_device_id *devid =
 541                         spi_get_device_id(mc13xxx->spidev);
 542                 if (!devid || devid->driver_data != *id)
 543                         dev_warn(&mc13xxx->spidev->dev, "device id doesn't "
 544                                         "match auto detection!\n");
 545         }
 546
 547         return 0;
 548 }
 549
 550 static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
 551 {
 552         const struct spi_device_id *devid =
 553                 spi_get_device_id(mc13xxx->spidev);
 554
 555         if (!devid)
 556                 return NULL;
 557
 558         return mc13xxx_chipname[devid->driver_data];
 559 }
 560
 561 #include <linux/mfd/mc13783.h>
 562
 563 int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
 564 {
 565         struct mc13xxx_platform_data *pdata =
 566                 dev_get_platdata(&mc13xxx->spidev->dev);
 567
 568         return pdata->flags;
 569 }
 570 EXPORT_SYMBOL(mc13xxx_get_flags);
 571
 572 #define MC13783_ADC1_CHAN0_SHIFT        5
 573 #define MC13783_ADC1_CHAN1_SHIFT        8
 574
 575 struct mc13xxx_adcdone_data {
 576         struct mc13xxx *mc13xxx;
 577         struct completion done;
 578 };
 579
 580 static irqreturn_t mc13783_handler_adcdone(int irq, void *data)
 581 {
 582         struct mc13xxx_adcdone_data *adcdone_data = data;
 583
 584         mc13xxx_irq_ack(adcdone_data->mc13xxx, irq);
 585
 586         complete_all(&adcdone_data->done);
 587
 588         return IRQ_HANDLED;
 589 }
 590
 591 #define MC13783_ADC_WORKING (1 << 0)
 592
 593 int mc13783_adc_do_conversion(struct mc13783 *mc13783, unsigned int mode,
 594                 unsigned int channel, unsigned int *sample)
 595 {
 596         struct mc13xxx *mc13xxx = &mc13783->mc13xxx;
 597         u32 adc0, adc1, old_adc0;
 598         int i, ret;
 599         struct mc13xxx_adcdone_data adcdone_data = {
 600                 .mc13xxx = mc13xxx,
 601         };
 602         init_completion(&adcdone_data.done);
 603
 604         dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__);
 605
 606         mc13xxx_lock(mc13xxx);
 607
 608         if (mc13783->adcflags & MC13783_ADC_WORKING) {
 609                 ret = -EBUSY;
 610                 goto out;
 611         }
 612
 613         mc13783->adcflags |= MC13783_ADC_WORKING;
 614
 615         mc13xxx_reg_read(mc13xxx, MC13783_ADC0, &old_adc0);
 616
 617         adc0 = MC13783_ADC0_ADINC1 | MC13783_ADC0_ADINC2;
 618         adc1 = MC13783_ADC1_ADEN | MC13783_ADC1_ADTRIGIGN | MC13783_ADC1_ASC;
 619
 620         if (channel > 7)
 621                 adc1 |= MC13783_ADC1_ADSEL;
 622
 623         switch (mode) {
 624         case MC13783_ADC_MODE_TS:
 625                 adc0 |= MC13783_ADC0_ADREFEN | MC13783_ADC0_TSMOD0 |
 626                         MC13783_ADC0_TSMOD1;
 627                 adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
 628                 break;
 629
 630         case MC13783_ADC_MODE_SINGLE_CHAN:
 631                 adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
 632                 adc1 |= (channel & 0x7) << MC13783_ADC1_CHAN0_SHIFT;
 633                 adc1 |= MC13783_ADC1_RAND;
 634                 break;
 635
 636         case MC13783_ADC_MODE_MULT_CHAN:
 637                 adc0 |= old_adc0 & MC13783_ADC0_TSMOD_MASK;
 638                 adc1 |= 4 << MC13783_ADC1_CHAN1_SHIFT;
 639                 break;
 640
 641         default:
 642                 mc13783_unlock(mc13783);
 643                 return -EINVAL;
 644         }
 645
 646         dev_dbg(&mc13783->mc13xxx.spidev->dev, "%s: request irq\n", __func__);
 647         mc13xxx_irq_request(mc13xxx, MC13783_IRQ_ADCDONE,
 648                         mc13783_handler_adcdone, __func__, &adcdone_data);
 649         mc13xxx_irq_ack(mc13xxx, MC13783_IRQ_ADCDONE);
 650
 651         mc13xxx_reg_write(mc13xxx, MC13783_ADC0, adc0);
 652         mc13xxx_reg_write(mc13xxx, MC13783_ADC1, adc1);
 653
 654         mc13xxx_unlock(mc13xxx);
 655
 656         ret = wait_for_completion_interruptible_timeout(&adcdone_data.done, HZ);
 657
 658         if (!ret)
 659                 ret = -ETIMEDOUT;
 660
 661         mc13xxx_lock(mc13xxx);
 662
 663         mc13xxx_irq_free(mc13xxx, MC13783_IRQ_ADCDONE, &adcdone_data);
 664
 665         if (ret > 0)
 666                 for (i = 0; i < 4; ++i) {
 667                         ret = mc13xxx_reg_read(mc13xxx,
 668                                         MC13783_ADC2, &sample[i]);
 669                         if (ret)
 670                                 break;
 671                 }
 672
 673         if (mode == MC13783_ADC_MODE_TS)
 674                 /* restore TSMOD */
 675                 mc13xxx_reg_write(mc13xxx, MC13783_ADC0, old_adc0);
 676
 677         mc13783->adcflags &= ~MC13783_ADC_WORKING;
 678 out:
 679         mc13xxx_unlock(mc13xxx);
 680
 681         return ret;
 682 }
 683 EXPORT_SYMBOL_GPL(mc13783_adc_do_conversion);
 684
 685 static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
 686                 const char *format, void *pdata, size_t pdata_size)
 687 {
 688         char buf[30];
 689         const char *name = mc13xxx_get_chipname(mc13xxx);
 690
 691         struct mfd_cell cell = {
 692                 .platform_data = pdata,
 693                 .pdata_size = pdata_size,
 694         };
 695
 696         /* there is no asnprintf in the kernel :-( */
 697         if (snprintf(buf, sizeof(buf), format, name) > sizeof(buf))
 698                 return -E2BIG;
 699
 700         cell.name = kmemdup(buf, strlen(buf) + 1, GFP_KERNEL);
 701         if (!cell.name)
 702                 return -ENOMEM;
 703
 704         return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0);
 705 }
 706
 707 static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
 708 {
 709         return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
 710 }
 711
 712 static int mc13xxx_probe(struct spi_device *spi)
 713 {
 714         struct mc13xxx *mc13xxx;
 715         struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
 716         enum mc13xxx_id id;
 717         int ret;
 718
 719         mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
 720         if (!mc13xxx)
 721                 return -ENOMEM;
 722
 723         dev_set_drvdata(&spi->dev, mc13xxx);
 724         spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
 725         spi->bits_per_word = 32;
 726         spi_setup(spi);
 727
 728         mc13xxx->spidev = spi;
 729
 730         mutex_init(&mc13xxx->lock);
 731         mc13xxx_lock(mc13xxx);
 732
 733         ret = mc13xxx_identify(mc13xxx, &id);
 734         if (ret || id == MC13XXX_ID_INVALID)
 735                 goto err_revision;
 736
 737         /* mask all irqs */
 738         ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK0, 0x00ffffff);
 739         if (ret)
 740                 goto err_mask;
 741
 742         ret = mc13xxx_reg_write(mc13xxx, MC13XXX_IRQMASK1, 0x00ffffff);
 743         if (ret)
 744                 goto err_mask;
 745
 746         ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread,
 747                         IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
 748
 749         if (ret) {
 750 err_mask:
 751 err_revision:
 752                 mc13xxx_unlock(mc13xxx);
 753                 dev_set_drvdata(&spi->dev, NULL);
 754                 kfree(mc13xxx);
 755                 return ret;
 756         }
 757
 758         mc13xxx_unlock(mc13xxx);
 759
 760         if (pdata->flags & MC13XXX_USE_ADC)
 761                 mc13xxx_add_subdevice(mc13xxx, "%s-adc");
 762
 763         if (pdata->flags & MC13XXX_USE_CODEC)
 764                 mc13xxx_add_subdevice(mc13xxx, "%s-codec");
 765
 766         if (pdata->flags & MC13XXX_USE_REGULATOR) {
 767                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
 768                                 &pdata->regulators, sizeof(pdata->regulators));
 769         }
 770
 771         if (pdata->flags & MC13XXX_USE_RTC)
 772                 mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
 773
 774         if (pdata->flags & MC13XXX_USE_TOUCHSCREEN)
 775                 mc13xxx_add_subdevice(mc13xxx, "%s-ts");
 776
 777         if (pdata->flags & MC13XXX_USE_LED)
 778                 mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
 779                                 pdata->leds, sizeof(*pdata->leds));
 780
 781         return 0;
 782 }
 783
 784 static int __devexit mc13xxx_remove(struct spi_device *spi)
 785 {
 786         struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
 787
 788         free_irq(mc13xxx->spidev->irq, mc13xxx);
 789
 790         mfd_remove_devices(&spi->dev);
 791
 792         kfree(mc13xxx);
 793
 794         return 0;
 795 }
 796
 797 static const struct spi_device_id mc13xxx_device_id[] = {
 798         {
 799                 .name = "mc13783",
 800                 .driver_data = MC13XXX_ID_MC13783,
 801         }, {
 802                 .name = "mc13892",
 803                 .driver_data = MC13XXX_ID_MC13892,
 804         }, {
 805                 /* sentinel */
 806         }
 807 };
 808 MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
 809
 810 static struct spi_driver mc13xxx_driver = {
 811         .id_table = mc13xxx_device_id,
 812         .driver = {
 813                 .name = "mc13xxx",
 814                 .bus = &spi_bus_type,
 815                 .owner = THIS_MODULE,
 816         },
 817         .probe = mc13xxx_probe,
 818         .remove = __devexit_p(mc13xxx_remove),
 819 };
 820
 821 static int __init mc13xxx_init(void)
 822 {
 823         return spi_register_driver(&mc13xxx_driver);
 824 }
 825 subsys_initcall(mc13xxx_init);
 826
 827 static void __exit mc13xxx_exit(void)
 828 {
 829         spi_unregister_driver(&mc13xxx_driver);
 830 }
 831 module_exit(mc13xxx_exit);
 832
 833 MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
 834 MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
 835 MODULE_LICENSE("GPL v2");