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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 | /* * * Alchemy Semi Au1000 pcmcia driver * * Copyright 2001-2003 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ppopov@embeddedalley.com or source@mvista.com * * Copyright 2004 Pete Popov, Embedded Alley Solutions, Inc. * Updated the driver to 2.6. Followed the sa11xx API and largely * copied many of the hardware independent functions. * * ######################################################################## * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * ######################################################################## * * */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/config.h> #include <linux/cpufreq.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/notifier.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/platform_device.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/mach-au1x00/au1000.h> #include "au1000_generic.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("Pete Popov <ppopov@embeddedalley.com>"); MODULE_DESCRIPTION("Linux PCMCIA Card Services: Au1x00 Socket Controller"); #if 0 #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args) #else #define debug(x,args...) #endif #define MAP_SIZE 0x100000 extern struct au1000_pcmcia_socket au1000_pcmcia_socket[]; #define PCMCIA_SOCKET(x) (au1000_pcmcia_socket + (x)) #define to_au1000_socket(x) container_of(x, struct au1000_pcmcia_socket, socket) /* Some boards like to support CF cards as IDE root devices, so they * grab pcmcia sockets directly. */ u32 *pcmcia_base_vaddrs[2]; extern const unsigned long mips_io_port_base; DECLARE_MUTEX(pcmcia_sockets_lock); static int (*au1x00_pcmcia_hw_init[])(struct device *dev) = { au1x_board_init, }; static int au1x00_pcmcia_skt_state(struct au1000_pcmcia_socket *skt) { struct pcmcia_state state; unsigned int stat; memset(&state, 0, sizeof(struct pcmcia_state)); skt->ops->socket_state(skt, &state); stat = state.detect ? SS_DETECT : 0; stat |= state.ready ? SS_READY : 0; stat |= state.wrprot ? SS_WRPROT : 0; stat |= state.vs_3v ? SS_3VCARD : 0; stat |= state.vs_Xv ? SS_XVCARD : 0; stat |= skt->cs_state.Vcc ? SS_POWERON : 0; if (skt->cs_state.flags & SS_IOCARD) stat |= state.bvd1 ? SS_STSCHG : 0; else { if (state.bvd1 == 0) stat |= SS_BATDEAD; else if (state.bvd2 == 0) stat |= SS_BATWARN; } return stat; } /* * au100_pcmcia_config_skt * * Convert PCMCIA socket state to our socket configure structure. */ static int au1x00_pcmcia_config_skt(struct au1000_pcmcia_socket *skt, socket_state_t *state) { int ret; ret = skt->ops->configure_socket(skt, state); if (ret == 0) { skt->cs_state = *state; } if (ret < 0) debug("unable to configure socket %d\n", skt->nr); return ret; } /* au1x00_pcmcia_sock_init() * * (Re-)Initialise the socket, turning on status interrupts * and PCMCIA bus. This must wait for power to stabilise * so that the card status signals report correctly. * * Returns: 0 */ static int au1x00_pcmcia_sock_init(struct pcmcia_socket *sock) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("initializing socket %u\n", skt->nr); skt->ops->socket_init(skt); return 0; } /* * au1x00_pcmcia_suspend() * * Remove power on the socket, disable IRQs from the card. * Turn off status interrupts, and disable the PCMCIA bus. * * Returns: 0 */ static int au1x00_pcmcia_suspend(struct pcmcia_socket *sock) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("suspending socket %u\n", skt->nr); skt->ops->socket_suspend(skt); return 0; } static DEFINE_SPINLOCK(status_lock); /* * au1x00_check_status() */ static void au1x00_check_status(struct au1000_pcmcia_socket *skt) { unsigned int events; debug("entering PCMCIA monitoring thread\n"); do { unsigned int status; unsigned long flags; status = au1x00_pcmcia_skt_state(skt); spin_lock_irqsave(&status_lock, flags); events = (status ^ skt->status) & skt->cs_state.csc_mask; skt->status = status; spin_unlock_irqrestore(&status_lock, flags); debug("events: %s%s%s%s%s%s\n", events == 0 ? "<NONE>" : "", events & SS_DETECT ? "DETECT " : "", events & SS_READY ? "READY " : "", events & SS_BATDEAD ? "BATDEAD " : "", events & SS_BATWARN ? "BATWARN " : "", events & SS_STSCHG ? "STSCHG " : ""); if (events) pcmcia_parse_events(&skt->socket, events); } while (events); } /* * au1x00_pcmcia_poll_event() * Let's poll for events in addition to IRQs since IRQ only is unreliable... */ static void au1x00_pcmcia_poll_event(unsigned long dummy) { struct au1000_pcmcia_socket *skt = (struct au1000_pcmcia_socket *)dummy; debug("polling for events\n"); mod_timer(&skt->poll_timer, jiffies + AU1000_PCMCIA_POLL_PERIOD); au1x00_check_status(skt); } /* au1x00_pcmcia_get_status() * * From the sa11xx_core.c: * Implements the get_status() operation for the in-kernel PCMCIA * service (formerly SS_GetStatus in Card Services). Essentially just * fills in bits in `status' according to internal driver state or * the value of the voltage detect chipselect register. * * As a debugging note, during card startup, the PCMCIA core issues * three set_socket() commands in a row the first with RESET deasserted, * the second with RESET asserted, and the last with RESET deasserted * again. Following the third set_socket(), a get_status() command will * be issued. The kernel is looking for the SS_READY flag (see * setup_socket(), reset_socket(), and unreset_socket() in cs.c). * * Returns: 0 */ static int au1x00_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); skt->status = au1x00_pcmcia_skt_state(skt); *status = skt->status; return 0; } /* au1x00_pcmcia_set_socket() * Implements the set_socket() operation for the in-kernel PCMCIA * service (formerly SS_SetSocket in Card Services). We more or * less punt all of this work and let the kernel handle the details * of power configuration, reset, &c. We also record the value of * `state' in order to regurgitate it to the PCMCIA core later. * * Returns: 0 */ static int au1x00_pcmcia_set_socket(struct pcmcia_socket *sock, socket_state_t *state) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("for sock %u\n", skt->nr); debug("\tmask: %s%s%s%s%s%s\n\tflags: %s%s%s%s%s%s\n", (state->csc_mask==0)?"<NONE>":"", (state->csc_mask&SS_DETECT)?"DETECT ":"", (state->csc_mask&SS_READY)?"READY ":"", (state->csc_mask&SS_BATDEAD)?"BATDEAD ":"", (state->csc_mask&SS_BATWARN)?"BATWARN ":"", (state->csc_mask&SS_STSCHG)?"STSCHG ":"", (state->flags==0)?"<NONE>":"", (state->flags&SS_PWR_AUTO)?"PWR_AUTO ":"", (state->flags&SS_IOCARD)?"IOCARD ":"", (state->flags&SS_RESET)?"RESET ":"", (state->flags&SS_SPKR_ENA)?"SPKR_ENA ":"", (state->flags&SS_OUTPUT_ENA)?"OUTPUT_ENA ":""); debug("\tVcc %d Vpp %d irq %d\n", state->Vcc, state->Vpp, state->io_irq); return au1x00_pcmcia_config_skt(skt, state); } int au1x00_pcmcia_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *map) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); unsigned int speed; if(map->map>=MAX_IO_WIN){ debug("map (%d) out of range\n", map->map); return -1; } if(map->flags&MAP_ACTIVE){ speed=(map->speed>0)?map->speed:AU1000_PCMCIA_IO_SPEED; skt->spd_io[map->map] = speed; } map->start=(ioaddr_t)(u32)skt->virt_io; map->stop=map->start+MAP_SIZE; return 0; } /* au1x00_pcmcia_set_io_map() */ static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *map) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); unsigned short speed = map->speed; if(map->map>=MAX_WIN){ debug("map (%d) out of range\n", map->map); return -1; } if (map->flags & MAP_ATTRIB) { skt->spd_attr[map->map] = speed; skt->spd_mem[map->map] = 0; } else { skt->spd_attr[map->map] = 0; skt->spd_mem[map->map] = speed; } if (map->flags & MAP_ATTRIB) { map->static_start = skt->phys_attr + map->card_start; } else { map->static_start = skt->phys_mem + map->card_start; } debug("set_mem_map %d start %08lx card_start %08x\n", map->map, map->static_start, map->card_start); return 0; } /* au1x00_pcmcia_set_mem_map() */ static struct pccard_operations au1x00_pcmcia_operations = { .init = au1x00_pcmcia_sock_init, .suspend = au1x00_pcmcia_suspend, .get_status = au1x00_pcmcia_get_status, .set_socket = au1x00_pcmcia_set_socket, .set_io_map = au1x00_pcmcia_set_io_map, .set_mem_map = au1x00_pcmcia_set_mem_map, }; static const char *skt_names[] = { "PCMCIA socket 0", "PCMCIA socket 1", }; struct skt_dev_info { int nskt; }; int au1x00_pcmcia_socket_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr) { struct skt_dev_info *sinfo; int ret, i; sinfo = kzalloc(sizeof(struct skt_dev_info), GFP_KERNEL); if (!sinfo) { ret = -ENOMEM; goto out; } sinfo->nskt = nr; /* * Initialise the per-socket structure. */ for (i = 0; i < nr; i++) { struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i); memset(skt, 0, sizeof(*skt)); skt->socket.resource_ops = &pccard_static_ops; skt->socket.ops = &au1x00_pcmcia_operations; skt->socket.owner = ops->owner; skt->socket.dev.dev = dev; init_timer(&skt->poll_timer); skt->poll_timer.function = au1x00_pcmcia_poll_event; skt->poll_timer.data = (unsigned long)skt; skt->poll_timer.expires = jiffies + AU1000_PCMCIA_POLL_PERIOD; skt->nr = first + i; skt->irq = 255; skt->dev = dev; skt->ops = ops; skt->res_skt.name = skt_names[skt->nr]; skt->res_io.name = "io"; skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY; skt->res_mem.name = "memory"; skt->res_mem.flags = IORESOURCE_MEM; skt->res_attr.name = "attribute"; skt->res_attr.flags = IORESOURCE_MEM; /* * PCMCIA client drivers use the inb/outb macros to access the * IO registers. Since mips_io_port_base is added to the * access address of the mips implementation of inb/outb, * we need to subtract it here because we want to access the * I/O or MEM address directly, without going through this * "mips_io_port_base" mechanism. */ if (i == 0) { skt->virt_io = (void *) (ioremap((phys_t)AU1X_SOCK0_IO, 0x1000) - (u32)mips_io_port_base); skt->phys_attr = AU1X_SOCK0_PSEUDO_PHYS_ATTR; skt->phys_mem = AU1X_SOCK0_PSEUDO_PHYS_MEM; } #ifndef CONFIG_MIPS_XXS1500 else { skt->virt_io = (void *) (ioremap((phys_t)AU1X_SOCK1_IO, 0x1000) - (u32)mips_io_port_base); skt->phys_attr = AU1X_SOCK1_PSEUDO_PHYS_ATTR; skt->phys_mem = AU1X_SOCK1_PSEUDO_PHYS_MEM; } #endif pcmcia_base_vaddrs[i] = (u32 *)skt->virt_io; ret = ops->hw_init(skt); skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; skt->socket.irq_mask = 0; skt->socket.map_size = MAP_SIZE; skt->socket.pci_irq = skt->irq; skt->socket.io_offset = (unsigned long)skt->virt_io; skt->status = au1x00_pcmcia_skt_state(skt); ret = pcmcia_register_socket(&skt->socket); if (ret) goto out_err; WARN_ON(skt->socket.sock != i); add_timer(&skt->poll_timer); } dev_set_drvdata(dev, sinfo); return 0; do { struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i); del_timer_sync(&skt->poll_timer); pcmcia_unregister_socket(&skt->socket); out_err: flush_scheduled_work(); ops->hw_shutdown(skt); i--; } while (i > 0); kfree(sinfo); out: return ret; } int au1x00_drv_pcmcia_remove(struct device *dev) { struct skt_dev_info *sinfo = dev_get_drvdata(dev); int i; down(&pcmcia_sockets_lock); dev_set_drvdata(dev, NULL); for (i = 0; i < sinfo->nskt; i++) { struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i); del_timer_sync(&skt->poll_timer); pcmcia_unregister_socket(&skt->socket); flush_scheduled_work(); skt->ops->hw_shutdown(skt); au1x00_pcmcia_config_skt(skt, &dead_socket); iounmap(skt->virt_io + (u32)mips_io_port_base); skt->virt_io = NULL; } kfree(sinfo); up(&pcmcia_sockets_lock); return 0; } /* * PCMCIA "Driver" API */ static int au1x00_drv_pcmcia_probe(struct device *dev) { int i, ret = -ENODEV; down(&pcmcia_sockets_lock); for (i=0; i < ARRAY_SIZE(au1x00_pcmcia_hw_init); i++) { ret = au1x00_pcmcia_hw_init[i](dev); if (ret == 0) break; } up(&pcmcia_sockets_lock); return ret; } static struct device_driver au1x00_pcmcia_driver = { .probe = au1x00_drv_pcmcia_probe, .remove = au1x00_drv_pcmcia_remove, .name = "au1x00-pcmcia", .bus = &platform_bus_type, .suspend = pcmcia_socket_dev_suspend, .resume = pcmcia_socket_dev_resume, }; /* au1x00_pcmcia_init() * * This routine performs low-level PCMCIA initialization and then * registers this socket driver with Card Services. * * Returns: 0 on success, -ve error code on failure */ static int __init au1x00_pcmcia_init(void) { int error = 0; if ((error = driver_register(&au1x00_pcmcia_driver))) return error; return error; } /* au1x00_pcmcia_exit() * Invokes the low-level kernel service to free IRQs associated with this * socket controller and reset GPIO edge detection. */ static void __exit au1x00_pcmcia_exit(void) { driver_unregister(&au1x00_pcmcia_driver); } module_init(au1x00_pcmcia_init); module_exit(au1x00_pcmcia_exit); |