1 /*====================================================================== 2 3 Common support code for the PCMCIA control functionality of 4 integrated SOCs like the SA-11x0 and PXA2xx microprocessors. 5 6 The contents of this file are subject to the Mozilla Public 7 License Version 1.1 (the "License"); you may not use this file 8 except in compliance with the License. You may obtain a copy of 9 the License at http://www.mozilla.org/MPL/ 10 11 Software distributed under the License is distributed on an "AS 12 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 13 implied. See the License for the specific language governing 14 rights and limitations under the License. 15 16 The initial developer of the original code is John G. Dorsey 17 <john+@cs.cmu.edu>. Portions created by John G. Dorsey are 18 Copyright (C) 1999 John G. Dorsey. All Rights Reserved. 19 20 Alternatively, the contents of this file may be used under the 21 terms of the GNU Public License version 2 (the "GPL"), in which 22 case the provisions of the GPL are applicable instead of the 23 above. If you wish to allow the use of your version of this file 24 only under the terms of the GPL and not to allow others to use 25 your version of this file under the MPL, indicate your decision 26 by deleting the provisions above and replace them with the notice 27 and other provisions required by the GPL. If you do not delete 28 the provisions above, a recipient may use your version of this 29 file under either the MPL or the GPL. 30 31 ======================================================================*/ 32 33 34 #include <linux/cpufreq.h> 35 #include <linux/gpio.h> 36 #include <linux/gpio/consumer.h> 37 #include <linux/init.h> 38 #include <linux/interrupt.h> 39 #include <linux/io.h> 40 #include <linux/irq.h> 41 #include <linux/kernel.h> 42 #include <linux/mm.h> 43 #include <linux/module.h> 44 #include <linux/moduleparam.h> 45 #include <linux/mutex.h> 46 #include <linux/regulator/consumer.h> 47 #include <linux/spinlock.h> 48 #include <linux/timer.h> 49 50 #include <mach/hardware.h> 51 52 #include "soc_common.h" 53 54 static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); 55 56 #ifdef CONFIG_PCMCIA_DEBUG 57 58 static int pc_debug; 59 module_param(pc_debug, int, 0644); 60 61 void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, 62 int lvl, const char *fmt, ...) 63 { 64 struct va_format vaf; 65 va_list args; 66 if (pc_debug > lvl) { 67 va_start(args, fmt); 68 69 vaf.fmt = fmt; 70 vaf.va = &args; 71 72 printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); 73 74 va_end(args); 75 } 76 } 77 EXPORT_SYMBOL(soc_pcmcia_debug); 78 79 #endif 80 81 #define to_soc_pcmcia_socket(x) \ 82 container_of(x, struct soc_pcmcia_socket, socket) 83 84 int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, 85 struct soc_pcmcia_regulator *r, int v) 86 { 87 bool on; 88 int ret; 89 90 if (!r->reg) 91 return 0; 92 93 on = v != 0; 94 if (r->on == on) 95 return 0; 96 97 if (on) { 98 ret = regulator_set_voltage(r->reg, v * 100000, v * 100000); 99 if (ret) { 100 int vout = regulator_get_voltage(r->reg) / 100000; 101 102 dev_warn(&skt->socket.dev, 103 "CS requested %s=%u.%uV, applying %u.%uV\n", 104 r == &skt->vcc ? "Vcc" : "Vpp", 105 v / 10, v % 10, vout / 10, vout % 10); 106 } 107 108 ret = regulator_enable(r->reg); 109 } else { 110 ret = regulator_disable(r->reg); 111 } 112 if (ret == 0) 113 r->on = on; 114 115 return ret; 116 } 117 EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); 118 119 static unsigned short 120 calc_speed(unsigned short *spds, int num, unsigned short dflt) 121 { 122 unsigned short speed = 0; 123 int i; 124 125 for (i = 0; i < num; i++) 126 if (speed < spds[i]) 127 speed = spds[i]; 128 if (speed == 0) 129 speed = dflt; 130 131 return speed; 132 } 133 134 void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, 135 struct soc_pcmcia_timing *timing) 136 { 137 timing->io = 138 calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); 139 timing->mem = 140 calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); 141 timing->attr = 142 calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); 143 } 144 EXPORT_SYMBOL(soc_common_pcmcia_get_timing); 145 146 static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, 147 unsigned int nr) 148 { 149 unsigned int i; 150 151 for (i = 0; i < nr; i++) 152 if (skt->stat[i].irq) 153 free_irq(skt->stat[i].irq, skt); 154 155 if (skt->ops->hw_shutdown) 156 skt->ops->hw_shutdown(skt); 157 158 clk_disable_unprepare(skt->clk); 159 } 160 161 static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) 162 { 163 __soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); 164 } 165 166 int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt) 167 { 168 struct device *dev = skt->socket.dev.parent; 169 struct gpio_desc *desc; 170 int i; 171 172 for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { 173 if (!skt->stat[i].name) 174 continue; 175 176 desc = devm_gpiod_get(dev, skt->stat[i].name, GPIOD_IN); 177 if (IS_ERR(desc)) { 178 dev_err(dev, "Failed to get GPIO for %s: %ld\n", 179 skt->stat[i].name, PTR_ERR(desc)); 180 return PTR_ERR(desc); 181 } 182 183 skt->stat[i].desc = desc; 184 } 185 186 return 0; 187 } 188 EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); 189 190 static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) 191 { 192 int ret = 0, i; 193 194 ret = clk_prepare_enable(skt->clk); 195 if (ret) 196 return ret; 197 198 if (skt->ops->hw_init) { 199 ret = skt->ops->hw_init(skt); 200 if (ret) { 201 clk_disable_unprepare(skt->clk); 202 return ret; 203 } 204 } 205 206 for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { 207 if (gpio_is_valid(skt->stat[i].gpio)) { 208 unsigned long flags = GPIOF_IN; 209 210 /* CD is active low by default */ 211 if (i == SOC_STAT_CD) 212 flags |= GPIOF_ACTIVE_LOW; 213 214 ret = devm_gpio_request_one(skt->socket.dev.parent, 215 skt->stat[i].gpio, flags, 216 skt->stat[i].name); 217 if (ret) { 218 __soc_pcmcia_hw_shutdown(skt, i); 219 return ret; 220 } 221 222 skt->stat[i].desc = gpio_to_desc(skt->stat[i].gpio); 223 } 224 225 if (i < SOC_STAT_VS1 && skt->stat[i].desc) { 226 int irq = gpiod_to_irq(skt->stat[i].desc); 227 228 if (irq > 0) { 229 if (i == SOC_STAT_RDY) 230 skt->socket.pci_irq = irq; 231 else 232 skt->stat[i].irq = irq; 233 } 234 } 235 236 if (skt->stat[i].irq) { 237 ret = request_irq(skt->stat[i].irq, 238 soc_common_pcmcia_interrupt, 239 IRQF_TRIGGER_NONE, 240 skt->stat[i].name, skt); 241 if (ret) { 242 __soc_pcmcia_hw_shutdown(skt, i); 243 return ret; 244 } 245 } 246 } 247 248 return ret; 249 } 250 251 static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) 252 { 253 int i; 254 255 for (i = 0; i < ARRAY_SIZE(skt->stat); i++) 256 if (skt->stat[i].irq) { 257 irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); 258 irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_BOTH); 259 } 260 } 261 262 static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) 263 { 264 int i; 265 266 for (i = 0; i < ARRAY_SIZE(skt->stat); i++) 267 if (skt->stat[i].irq) 268 irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_NONE); 269 } 270 271 /* 272 * The CF 3.0 specification says that cards tie VS1 to ground and leave 273 * VS2 open. Many implementations do not wire up the VS signals, so we 274 * provide hard-coded values as per the CF 3.0 spec. 275 */ 276 void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, 277 struct pcmcia_state *state) 278 { 279 state->vs_3v = 1; 280 } 281 EXPORT_SYMBOL_GPL(soc_common_cf_socket_state); 282 283 static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) 284 { 285 struct pcmcia_state state; 286 unsigned int stat; 287 288 memset(&state, 0, sizeof(struct pcmcia_state)); 289 290 /* Make battery voltage state report 'good' */ 291 state.bvd1 = 1; 292 state.bvd2 = 1; 293 294 if (skt->stat[SOC_STAT_CD].desc) 295 state.detect = !!gpiod_get_value(skt->stat[SOC_STAT_CD].desc); 296 if (skt->stat[SOC_STAT_RDY].desc) 297 state.ready = !!gpiod_get_value(skt->stat[SOC_STAT_RDY].desc); 298 if (skt->stat[SOC_STAT_BVD1].desc) 299 state.bvd1 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD1].desc); 300 if (skt->stat[SOC_STAT_BVD2].desc) 301 state.bvd2 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD2].desc); 302 if (skt->stat[SOC_STAT_VS1].desc) 303 state.vs_3v = !!gpiod_get_value(skt->stat[SOC_STAT_VS1].desc); 304 if (skt->stat[SOC_STAT_VS2].desc) 305 state.vs_Xv = !!gpiod_get_value(skt->stat[SOC_STAT_VS2].desc); 306 307 skt->ops->socket_state(skt, &state); 308 309 stat = state.detect ? SS_DETECT : 0; 310 stat |= state.ready ? SS_READY : 0; 311 stat |= state.wrprot ? SS_WRPROT : 0; 312 stat |= state.vs_3v ? SS_3VCARD : 0; 313 stat |= state.vs_Xv ? SS_XVCARD : 0; 314 315 /* The power status of individual sockets is not available 316 * explicitly from the hardware, so we just remember the state 317 * and regurgitate it upon request: 318 */ 319 stat |= skt->cs_state.Vcc ? SS_POWERON : 0; 320 321 if (skt->cs_state.flags & SS_IOCARD) 322 stat |= state.bvd1 ? 0 : SS_STSCHG; 323 else { 324 if (state.bvd1 == 0) 325 stat |= SS_BATDEAD; 326 else if (state.bvd2 == 0) 327 stat |= SS_BATWARN; 328 } 329 return stat; 330 } 331 332 /* 333 * soc_common_pcmcia_config_skt 334 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 335 * 336 * Convert PCMCIA socket state to our socket configure structure. 337 */ 338 static int soc_common_pcmcia_config_skt( 339 struct soc_pcmcia_socket *skt, socket_state_t *state) 340 { 341 int ret; 342 343 ret = skt->ops->configure_socket(skt, state); 344 if (ret < 0) { 345 pr_err("soc_common_pcmcia: unable to configure socket %d\n", 346 skt->nr); 347 /* restore the previous state */ 348 WARN_ON(skt->ops->configure_socket(skt, &skt->cs_state)); 349 return ret; 350 } 351 352 if (ret == 0) { 353 struct gpio_desc *descs[2]; 354 int values[2], n = 0; 355 356 if (skt->gpio_reset) { 357 descs[n] = skt->gpio_reset; 358 values[n++] = !!(state->flags & SS_RESET); 359 } 360 if (skt->gpio_bus_enable) { 361 descs[n] = skt->gpio_bus_enable; 362 values[n++] = !!(state->flags & SS_OUTPUT_ENA); 363 } 364 365 if (n) 366 gpiod_set_array_value_cansleep(n, descs, values); 367 368 /* 369 * This really needs a better solution. The IRQ 370 * may or may not be claimed by the driver. 371 */ 372 if (skt->irq_state != 1 && state->io_irq) { 373 skt->irq_state = 1; 374 irq_set_irq_type(skt->socket.pci_irq, 375 IRQ_TYPE_EDGE_FALLING); 376 } else if (skt->irq_state == 1 && state->io_irq == 0) { 377 skt->irq_state = 0; 378 irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); 379 } 380 381 skt->cs_state = *state; 382 } 383 384 return ret; 385 } 386 387 /* soc_common_pcmcia_sock_init() 388 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 389 * 390 * (Re-)Initialise the socket, turning on status interrupts 391 * and PCMCIA bus. This must wait for power to stabilise 392 * so that the card status signals report correctly. 393 * 394 * Returns: 0 395 */ 396 static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) 397 { 398 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 399 400 debug(skt, 2, "initializing socket\n"); 401 if (skt->ops->socket_init) 402 skt->ops->socket_init(skt); 403 soc_pcmcia_hw_enable(skt); 404 return 0; 405 } 406 407 408 /* 409 * soc_common_pcmcia_suspend() 410 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 411 * 412 * Remove power on the socket, disable IRQs from the card. 413 * Turn off status interrupts, and disable the PCMCIA bus. 414 * 415 * Returns: 0 416 */ 417 static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) 418 { 419 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 420 421 debug(skt, 2, "suspending socket\n"); 422 423 soc_pcmcia_hw_disable(skt); 424 if (skt->ops->socket_suspend) 425 skt->ops->socket_suspend(skt); 426 427 return 0; 428 } 429 430 static DEFINE_SPINLOCK(status_lock); 431 432 static void soc_common_check_status(struct soc_pcmcia_socket *skt) 433 { 434 unsigned int events; 435 436 debug(skt, 4, "entering PCMCIA monitoring thread\n"); 437 438 do { 439 unsigned int status; 440 unsigned long flags; 441 442 status = soc_common_pcmcia_skt_state(skt); 443 444 spin_lock_irqsave(&status_lock, flags); 445 events = (status ^ skt->status) & skt->cs_state.csc_mask; 446 skt->status = status; 447 spin_unlock_irqrestore(&status_lock, flags); 448 449 debug(skt, 4, "events: %s%s%s%s%s%s\n", 450 events == 0 ? "<NONE>" : "", 451 events & SS_DETECT ? "DETECT " : "", 452 events & SS_READY ? "READY " : "", 453 events & SS_BATDEAD ? "BATDEAD " : "", 454 events & SS_BATWARN ? "BATWARN " : "", 455 events & SS_STSCHG ? "STSCHG " : ""); 456 457 if (events) 458 pcmcia_parse_events(&skt->socket, events); 459 } while (events); 460 } 461 462 /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ 463 static void soc_common_pcmcia_poll_event(struct timer_list *t) 464 { 465 struct soc_pcmcia_socket *skt = from_timer(skt, t, poll_timer); 466 debug(skt, 4, "polling for events\n"); 467 468 mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD); 469 470 soc_common_check_status(skt); 471 } 472 473 474 /* 475 * Service routine for socket driver interrupts (requested by the 476 * low-level PCMCIA init() operation via soc_common_pcmcia_thread()). 477 * The actual interrupt-servicing work is performed by 478 * soc_common_pcmcia_thread(), largely because the Card Services event- 479 * handling code performs scheduling operations which cannot be 480 * executed from within an interrupt context. 481 */ 482 static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) 483 { 484 struct soc_pcmcia_socket *skt = dev; 485 486 debug(skt, 3, "servicing IRQ %d\n", irq); 487 488 soc_common_check_status(skt); 489 490 return IRQ_HANDLED; 491 } 492 493 494 /* 495 * Implements the get_status() operation for the in-kernel PCMCIA 496 * service (formerly SS_GetStatus in Card Services). Essentially just 497 * fills in bits in `status' according to internal driver state or 498 * the value of the voltage detect chipselect register. 499 * 500 * As a debugging note, during card startup, the PCMCIA core issues 501 * three set_socket() commands in a row the first with RESET deasserted, 502 * the second with RESET asserted, and the last with RESET deasserted 503 * again. Following the third set_socket(), a get_status() command will 504 * be issued. The kernel is looking for the SS_READY flag (see 505 * setup_socket(), reset_socket(), and unreset_socket() in cs.c). 506 * 507 * Returns: 0 508 */ 509 static int 510 soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) 511 { 512 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 513 514 skt->status = soc_common_pcmcia_skt_state(skt); 515 *status = skt->status; 516 517 return 0; 518 } 519 520 521 /* 522 * Implements the set_socket() operation for the in-kernel PCMCIA 523 * service (formerly SS_SetSocket in Card Services). We more or 524 * less punt all of this work and let the kernel handle the details 525 * of power configuration, reset, &c. We also record the value of 526 * `state' in order to regurgitate it to the PCMCIA core later. 527 */ 528 static int soc_common_pcmcia_set_socket( 529 struct pcmcia_socket *sock, socket_state_t *state) 530 { 531 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 532 533 debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n", 534 (state->csc_mask == 0) ? "<NONE> " : "", 535 (state->csc_mask & SS_DETECT) ? "DETECT " : "", 536 (state->csc_mask & SS_READY) ? "READY " : "", 537 (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "", 538 (state->csc_mask & SS_BATWARN) ? "BATWARN " : "", 539 (state->csc_mask & SS_STSCHG) ? "STSCHG " : "", 540 (state->flags == 0) ? "<NONE> " : "", 541 (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "", 542 (state->flags & SS_IOCARD) ? "IOCARD " : "", 543 (state->flags & SS_RESET) ? "RESET " : "", 544 (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "", 545 (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "", 546 state->Vcc, state->Vpp, state->io_irq); 547 548 return soc_common_pcmcia_config_skt(skt, state); 549 } 550 551 552 /* 553 * Implements the set_io_map() operation for the in-kernel PCMCIA 554 * service (formerly SS_SetIOMap in Card Services). We configure 555 * the map speed as requested, but override the address ranges 556 * supplied by Card Services. 557 * 558 * Returns: 0 on success, -1 on error 559 */ 560 static int soc_common_pcmcia_set_io_map( 561 struct pcmcia_socket *sock, struct pccard_io_map *map) 562 { 563 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 564 unsigned short speed = map->speed; 565 566 debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n", 567 map->map, map->speed, (unsigned long long)map->start, 568 (unsigned long long)map->stop); 569 debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", 570 (map->flags == 0) ? "<NONE>" : "", 571 (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", 572 (map->flags & MAP_16BIT) ? "16BIT " : "", 573 (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", 574 (map->flags & MAP_0WS) ? "0WS " : "", 575 (map->flags & MAP_WRPROT) ? "WRPROT " : "", 576 (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "", 577 (map->flags & MAP_PREFETCH) ? "PREFETCH " : ""); 578 579 if (map->map >= MAX_IO_WIN) { 580 printk(KERN_ERR "%s(): map (%d) out of range\n", __func__, 581 map->map); 582 return -1; 583 } 584 585 if (map->flags & MAP_ACTIVE) { 586 if (speed == 0) 587 speed = SOC_PCMCIA_IO_ACCESS; 588 } else { 589 speed = 0; 590 } 591 592 skt->spd_io[map->map] = speed; 593 skt->ops->set_timing(skt); 594 595 if (map->stop == 1) 596 map->stop = PAGE_SIZE-1; 597 598 map->stop -= map->start; 599 map->stop += skt->socket.io_offset; 600 map->start = skt->socket.io_offset; 601 602 return 0; 603 } 604 605 606 /* 607 * Implements the set_mem_map() operation for the in-kernel PCMCIA 608 * service (formerly SS_SetMemMap in Card Services). We configure 609 * the map speed as requested, but override the address ranges 610 * supplied by Card Services. 611 * 612 * Returns: 0 on success, -ERRNO on error 613 */ 614 static int soc_common_pcmcia_set_mem_map( 615 struct pcmcia_socket *sock, struct pccard_mem_map *map) 616 { 617 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); 618 struct resource *res; 619 unsigned short speed = map->speed; 620 621 debug(skt, 2, "map %u speed %u card_start %08x\n", 622 map->map, map->speed, map->card_start); 623 debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", 624 (map->flags == 0) ? "<NONE>" : "", 625 (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", 626 (map->flags & MAP_16BIT) ? "16BIT " : "", 627 (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", 628 (map->flags & MAP_0WS) ? "0WS " : "", 629 (map->flags & MAP_WRPROT) ? "WRPROT " : "", 630 (map->flags & MAP_ATTRIB) ? "ATTRIB " : "", 631 (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : ""); 632 633 if (map->map >= MAX_WIN) 634 return -EINVAL; 635 636 if (map->flags & MAP_ACTIVE) { 637 if (speed == 0) 638 speed = 300; 639 } else { 640 speed = 0; 641 } 642 643 if (map->flags & MAP_ATTRIB) { 644 res = &skt->res_attr; 645 skt->spd_attr[map->map] = speed; 646 skt->spd_mem[map->map] = 0; 647 } else { 648 res = &skt->res_mem; 649 skt->spd_attr[map->map] = 0; 650 skt->spd_mem[map->map] = speed; 651 } 652 653 skt->ops->set_timing(skt); 654 655 map->static_start = res->start + map->card_start; 656 657 return 0; 658 } 659 660 struct bittbl { 661 unsigned int mask; 662 const char *name; 663 }; 664 665 static struct bittbl status_bits[] = { 666 { SS_WRPROT, "SS_WRPROT" }, 667 { SS_BATDEAD, "SS_BATDEAD" }, 668 { SS_BATWARN, "SS_BATWARN" }, 669 { SS_READY, "SS_READY" }, 670 { SS_DETECT, "SS_DETECT" }, 671 { SS_POWERON, "SS_POWERON" }, 672 { SS_STSCHG, "SS_STSCHG" }, 673 { SS_3VCARD, "SS_3VCARD" }, 674 { SS_XVCARD, "SS_XVCARD" }, 675 }; 676 677 static struct bittbl conf_bits[] = { 678 { SS_PWR_AUTO, "SS_PWR_AUTO" }, 679 { SS_IOCARD, "SS_IOCARD" }, 680 { SS_RESET, "SS_RESET" }, 681 { SS_DMA_MODE, "SS_DMA_MODE" }, 682 { SS_SPKR_ENA, "SS_SPKR_ENA" }, 683 { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" }, 684 }; 685 686 static void dump_bits(char **p, const char *prefix, 687 unsigned int val, struct bittbl *bits, int sz) 688 { 689 char *b = *p; 690 int i; 691 692 b += sprintf(b, "%-9s:", prefix); 693 for (i = 0; i < sz; i++) 694 if (val & bits[i].mask) 695 b += sprintf(b, " %s", bits[i].name); 696 *b++ = '\n'; 697 *p = b; 698 } 699 700 /* 701 * Implements the /sys/class/pcmcia_socket/??/status file. 702 * 703 * Returns: the number of characters added to the buffer 704 */ 705 static ssize_t show_status( 706 struct device *dev, struct device_attribute *attr, char *buf) 707 { 708 struct soc_pcmcia_socket *skt = 709 container_of(dev, struct soc_pcmcia_socket, socket.dev); 710 char *p = buf; 711 712 p += sprintf(p, "slot : %d\n", skt->nr); 713 714 dump_bits(&p, "status", skt->status, 715 status_bits, ARRAY_SIZE(status_bits)); 716 dump_bits(&p, "csc_mask", skt->cs_state.csc_mask, 717 status_bits, ARRAY_SIZE(status_bits)); 718 dump_bits(&p, "cs_flags", skt->cs_state.flags, 719 conf_bits, ARRAY_SIZE(conf_bits)); 720 721 p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc); 722 p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp); 723 p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, 724 skt->socket.pci_irq); 725 if (skt->ops->show_timing) 726 p += skt->ops->show_timing(skt, p); 727 728 return p-buf; 729 } 730 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); 731 732 733 static struct pccard_operations soc_common_pcmcia_operations = { 734 .init = soc_common_pcmcia_sock_init, 735 .suspend = soc_common_pcmcia_suspend, 736 .get_status = soc_common_pcmcia_get_status, 737 .set_socket = soc_common_pcmcia_set_socket, 738 .set_io_map = soc_common_pcmcia_set_io_map, 739 .set_mem_map = soc_common_pcmcia_set_mem_map, 740 }; 741 742 743 #ifdef CONFIG_CPU_FREQ 744 static int soc_common_pcmcia_cpufreq_nb(struct notifier_block *nb, 745 unsigned long val, void *data) 746 { 747 struct soc_pcmcia_socket *skt = container_of(nb, struct soc_pcmcia_socket, cpufreq_nb); 748 struct cpufreq_freqs *freqs = data; 749 750 return skt->ops->frequency_change(skt, val, freqs); 751 } 752 #endif 753 754 void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, 755 const struct pcmcia_low_level *ops, struct device *dev) 756 { 757 int i; 758 759 skt->ops = ops; 760 skt->socket.owner = ops->owner; 761 skt->socket.dev.parent = dev; 762 skt->socket.pci_irq = NO_IRQ; 763 764 for (i = 0; i < ARRAY_SIZE(skt->stat); i++) 765 skt->stat[i].gpio = -EINVAL; 766 } 767 EXPORT_SYMBOL(soc_pcmcia_init_one); 768 769 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) 770 { 771 del_timer_sync(&skt->poll_timer); 772 773 pcmcia_unregister_socket(&skt->socket); 774 775 #ifdef CONFIG_CPU_FREQ 776 if (skt->ops->frequency_change) 777 cpufreq_unregister_notifier(&skt->cpufreq_nb, 778 CPUFREQ_TRANSITION_NOTIFIER); 779 #endif 780 781 soc_pcmcia_hw_shutdown(skt); 782 783 /* should not be required; violates some lowlevel drivers */ 784 soc_common_pcmcia_config_skt(skt, &dead_socket); 785 786 iounmap(skt->virt_io); 787 skt->virt_io = NULL; 788 release_resource(&skt->res_attr); 789 release_resource(&skt->res_mem); 790 release_resource(&skt->res_io); 791 release_resource(&skt->res_skt); 792 } 793 EXPORT_SYMBOL(soc_pcmcia_remove_one); 794 795 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) 796 { 797 int ret; 798 799 skt->cs_state = dead_socket; 800 801 timer_setup(&skt->poll_timer, soc_common_pcmcia_poll_event, 0); 802 skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; 803 804 ret = request_resource(&iomem_resource, &skt->res_skt); 805 if (ret) 806 goto out_err_1; 807 808 ret = request_resource(&skt->res_skt, &skt->res_io); 809 if (ret) 810 goto out_err_2; 811 812 ret = request_resource(&skt->res_skt, &skt->res_mem); 813 if (ret) 814 goto out_err_3; 815 816 ret = request_resource(&skt->res_skt, &skt->res_attr); 817 if (ret) 818 goto out_err_4; 819 820 skt->virt_io = ioremap(skt->res_io.start, 0x10000); 821 if (skt->virt_io == NULL) { 822 ret = -ENOMEM; 823 goto out_err_5; 824 } 825 826 /* 827 * We initialize default socket timing here, because 828 * we are not guaranteed to see a SetIOMap operation at 829 * runtime. 830 */ 831 skt->ops->set_timing(skt); 832 833 ret = soc_pcmcia_hw_init(skt); 834 if (ret) 835 goto out_err_6; 836 837 skt->socket.ops = &soc_common_pcmcia_operations; 838 skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; 839 skt->socket.resource_ops = &pccard_static_ops; 840 skt->socket.irq_mask = 0; 841 skt->socket.map_size = PAGE_SIZE; 842 skt->socket.io_offset = (unsigned long)skt->virt_io; 843 844 skt->status = soc_common_pcmcia_skt_state(skt); 845 846 #ifdef CONFIG_CPU_FREQ 847 if (skt->ops->frequency_change) { 848 skt->cpufreq_nb.notifier_call = soc_common_pcmcia_cpufreq_nb; 849 850 ret = cpufreq_register_notifier(&skt->cpufreq_nb, 851 CPUFREQ_TRANSITION_NOTIFIER); 852 if (ret < 0) 853 dev_err(skt->socket.dev.parent, 854 "unable to register CPU frequency change notifier for PCMCIA (%d)\n", 855 ret); 856 } 857 #endif 858 859 ret = pcmcia_register_socket(&skt->socket); 860 if (ret) 861 goto out_err_7; 862 863 ret = device_create_file(&skt->socket.dev, &dev_attr_status); 864 if (ret) 865 goto out_err_8; 866 867 return ret; 868 869 out_err_8: 870 del_timer_sync(&skt->poll_timer); 871 pcmcia_unregister_socket(&skt->socket); 872 873 out_err_7: 874 soc_pcmcia_hw_shutdown(skt); 875 out_err_6: 876 iounmap(skt->virt_io); 877 out_err_5: 878 release_resource(&skt->res_attr); 879 out_err_4: 880 release_resource(&skt->res_mem); 881 out_err_3: 882 release_resource(&skt->res_io); 883 out_err_2: 884 release_resource(&skt->res_skt); 885 out_err_1: 886 887 return ret; 888 } 889 EXPORT_SYMBOL(soc_pcmcia_add_one); 890 891 MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); 892 MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support"); 893 MODULE_LICENSE("Dual MPL/GPL"); 894