Blame view
drivers/video/pxa3xx-gcu.c
17.2 KB
364dbdf3b video: add driver... |
1 |
/* |
0b7f1cc79 video: pxa3xx-gcu... |
2 |
* pxa3xx-gcu.c - Linux kernel module for PXA3xx graphics controllers |
364dbdf3b video: add driver... |
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 |
* * This driver needs a DirectFB counterpart in user space, communication * is handled via mmap()ed memory areas and an ioctl. * * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> * Copyright (c) 2009 Janine Kropp <nin@directfb.org> * Copyright (c) 2009 Denis Oliver Kropp <dok@directfb.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * WARNING: This controller is attached to System Bus 2 of the PXA which |
25985edce Fix common misspe... |
28 |
* needs its arbiter to be enabled explicitly (CKENB & 1<<9). |
364dbdf3b video: add driver... |
29 30 31 32 33 |
* There is currently no way to do this from Linux, so you need to teach * your bootloader for now. */ #include <linux/module.h> |
364dbdf3b video: add driver... |
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 |
#include <linux/platform_device.h> #include <linux/dma-mapping.h> #include <linux/miscdevice.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/uaccess.h> #include <linux/ioctl.h> #include <linux/delay.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/clk.h> #include <linux/fs.h> #include <linux/io.h> #include "pxa3xx-gcu.h" #define DRV_NAME "pxa3xx-gcu" #define MISCDEV_MINOR 197 #define REG_GCCR 0x00 #define GCCR_SYNC_CLR (1 << 9) #define GCCR_BP_RST (1 << 8) #define GCCR_ABORT (1 << 6) #define GCCR_STOP (1 << 4) #define REG_GCISCR 0x04 #define REG_GCIECR 0x08 #define REG_GCRBBR 0x20 #define REG_GCRBLR 0x24 #define REG_GCRBHR 0x28 #define REG_GCRBTR 0x2C #define REG_GCRBEXHR 0x30 #define IE_EOB (1 << 0) #define IE_EEOB (1 << 5) #define IE_ALL 0xff #define SHARED_SIZE PAGE_ALIGN(sizeof(struct pxa3xx_gcu_shared)) /* #define PXA3XX_GCU_DEBUG */ /* #define PXA3XX_GCU_DEBUG_TIMER */ #ifdef PXA3XX_GCU_DEBUG #define QDUMP(msg) \ do { \ QPRINT(priv, KERN_DEBUG, msg); \ } while (0) #else #define QDUMP(msg) do {} while (0) #endif #define QERROR(msg) \ do { \ QPRINT(priv, KERN_ERR, msg); \ } while (0) struct pxa3xx_gcu_batch { struct pxa3xx_gcu_batch *next; u32 *ptr; dma_addr_t phys; unsigned long length; }; struct pxa3xx_gcu_priv { void __iomem *mmio_base; struct clk *clk; struct pxa3xx_gcu_shared *shared; dma_addr_t shared_phys; struct resource *resource_mem; struct miscdevice misc_dev; |
364dbdf3b video: add driver... |
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 |
wait_queue_head_t wait_idle; wait_queue_head_t wait_free; spinlock_t spinlock; struct timeval base_time; struct pxa3xx_gcu_batch *free; struct pxa3xx_gcu_batch *ready; struct pxa3xx_gcu_batch *ready_last; struct pxa3xx_gcu_batch *running; }; static inline unsigned long gc_readl(struct pxa3xx_gcu_priv *priv, unsigned int off) { return __raw_readl(priv->mmio_base + off); } static inline void gc_writel(struct pxa3xx_gcu_priv *priv, unsigned int off, unsigned long val) { __raw_writel(val, priv->mmio_base + off); } #define QPRINT(priv, level, msg) \ do { \ struct timeval tv; \ struct pxa3xx_gcu_shared *shared = priv->shared; \ u32 base = gc_readl(priv, REG_GCRBBR); \ \ do_gettimeofday(&tv); \ \ printk(level "%ld.%03ld.%03ld - %-17s: %-21s (%s, " \ "STATUS " \ "0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, " \ "T %5ld) ", \ tv.tv_sec - priv->base_time.tv_sec, \ tv.tv_usec / 1000, tv.tv_usec % 1000, \ __func__, msg, \ shared->hw_running ? "running" : " idle", \ gc_readl(priv, REG_GCISCR), \ gc_readl(priv, REG_GCRBBR), \ gc_readl(priv, REG_GCRBLR), \ (gc_readl(priv, REG_GCRBEXHR) - base) / 4, \ (gc_readl(priv, REG_GCRBHR) - base) / 4, \ (gc_readl(priv, REG_GCRBTR) - base) / 4); \ } while (0) static void pxa3xx_gcu_reset(struct pxa3xx_gcu_priv *priv) { QDUMP("RESET"); /* disable interrupts */ gc_writel(priv, REG_GCIECR, 0); /* reset hardware */ gc_writel(priv, REG_GCCR, GCCR_ABORT); gc_writel(priv, REG_GCCR, 0); memset(priv->shared, 0, SHARED_SIZE); priv->shared->buffer_phys = priv->shared_phys; priv->shared->magic = PXA3XX_GCU_SHARED_MAGIC; do_gettimeofday(&priv->base_time); /* set up the ring buffer pointers */ gc_writel(priv, REG_GCRBLR, 0); gc_writel(priv, REG_GCRBBR, priv->shared_phys); gc_writel(priv, REG_GCRBTR, priv->shared_phys); /* enable all IRQs except EOB */ gc_writel(priv, REG_GCIECR, IE_ALL & ~IE_EOB); } static void dump_whole_state(struct pxa3xx_gcu_priv *priv) { struct pxa3xx_gcu_shared *sh = priv->shared; u32 base = gc_readl(priv, REG_GCRBBR); QDUMP("DUMP"); printk(KERN_DEBUG "== PXA3XX-GCU DUMP == " "%s, STATUS 0x%02lx, B 0x%08lx [%ld], E %5ld, H %5ld, T %5ld ", sh->hw_running ? "running" : "idle ", gc_readl(priv, REG_GCISCR), gc_readl(priv, REG_GCRBBR), gc_readl(priv, REG_GCRBLR), (gc_readl(priv, REG_GCRBEXHR) - base) / 4, (gc_readl(priv, REG_GCRBHR) - base) / 4, (gc_readl(priv, REG_GCRBTR) - base) / 4); } static void flush_running(struct pxa3xx_gcu_priv *priv) { struct pxa3xx_gcu_batch *running = priv->running; struct pxa3xx_gcu_batch *next; while (running) { next = running->next; running->next = priv->free; priv->free = running; running = next; } priv->running = NULL; } static void run_ready(struct pxa3xx_gcu_priv *priv) { unsigned int num = 0; struct pxa3xx_gcu_shared *shared = priv->shared; struct pxa3xx_gcu_batch *ready = priv->ready; QDUMP("Start"); BUG_ON(!ready); shared->buffer[num++] = 0x05000000; while (ready) { shared->buffer[num++] = 0x00000001; shared->buffer[num++] = ready->phys; ready = ready->next; } shared->buffer[num++] = 0x05000000; priv->running = priv->ready; priv->ready = priv->ready_last = NULL; gc_writel(priv, REG_GCRBLR, 0); shared->hw_running = 1; /* ring base address */ gc_writel(priv, REG_GCRBBR, shared->buffer_phys); /* ring tail address */ gc_writel(priv, REG_GCRBTR, shared->buffer_phys + num * 4); /* ring length */ gc_writel(priv, REG_GCRBLR, ((num + 63) & ~63) * 4); } static irqreturn_t pxa3xx_gcu_handle_irq(int irq, void *ctx) { struct pxa3xx_gcu_priv *priv = ctx; struct pxa3xx_gcu_shared *shared = priv->shared; u32 status = gc_readl(priv, REG_GCISCR) & IE_ALL; QDUMP("-Interrupt"); if (!status) return IRQ_NONE; spin_lock(&priv->spinlock); shared->num_interrupts++; if (status & IE_EEOB) { QDUMP(" [EEOB]"); flush_running(priv); wake_up_all(&priv->wait_free); if (priv->ready) { run_ready(priv); } else { /* There is no more data prepared by the userspace. * Set hw_running = 0 and wait for the next userspace * kick-off */ shared->num_idle++; shared->hw_running = 0; QDUMP(" '-> Idle."); /* set ring buffer length to zero */ gc_writel(priv, REG_GCRBLR, 0); wake_up_all(&priv->wait_idle); } shared->num_done++; } else { QERROR(" [???]"); dump_whole_state(priv); } /* Clear the interrupt */ gc_writel(priv, REG_GCISCR, status); spin_unlock(&priv->spinlock); return IRQ_HANDLED; } static int pxa3xx_gcu_wait_idle(struct pxa3xx_gcu_priv *priv) { int ret = 0; QDUMP("Waiting for idle..."); /* Does not need to be atomic. There's a lock in user space, * but anyhow, this is just for statistics. */ priv->shared->num_wait_idle++; while (priv->shared->hw_running) { int num = priv->shared->num_interrupts; u32 rbexhr = gc_readl(priv, REG_GCRBEXHR); ret = wait_event_interruptible_timeout(priv->wait_idle, !priv->shared->hw_running, HZ*4); |
688ec344a video: pxa3xx-gcu... |
320 |
if (ret != 0) |
364dbdf3b video: add driver... |
321 |
break; |
364dbdf3b video: add driver... |
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 |
if (gc_readl(priv, REG_GCRBEXHR) == rbexhr && priv->shared->num_interrupts == num) { QERROR("TIMEOUT"); ret = -ETIMEDOUT; break; } } QDUMP("done"); return ret; } static int pxa3xx_gcu_wait_free(struct pxa3xx_gcu_priv *priv) { int ret = 0; QDUMP("Waiting for free..."); /* Does not need to be atomic. There's a lock in user space, * but anyhow, this is just for statistics. */ priv->shared->num_wait_free++; while (!priv->free) { u32 rbexhr = gc_readl(priv, REG_GCRBEXHR); ret = wait_event_interruptible_timeout(priv->wait_free, priv->free, HZ*4); if (ret < 0) break; if (ret > 0) continue; if (gc_readl(priv, REG_GCRBEXHR) == rbexhr) { QERROR("TIMEOUT"); ret = -ETIMEDOUT; break; } } QDUMP("done"); return ret; } /* Misc device layer */ |
996142e61 pxa3xx-gcu: quite... |
371 372 373 374 375 |
static inline struct pxa3xx_gcu_priv *file_dev(struct file *file) { struct miscdevice *dev = file->private_data; return container_of(dev, struct pxa3xx_gcu_priv, misc_dev); } |
364dbdf3b video: add driver... |
376 |
static ssize_t |
996142e61 pxa3xx-gcu: quite... |
377 |
pxa3xx_gcu_misc_write(struct file *file, const char *buff, |
364dbdf3b video: add driver... |
378 379 380 381 382 |
size_t count, loff_t *offp) { int ret; unsigned long flags; struct pxa3xx_gcu_batch *buffer; |
996142e61 pxa3xx-gcu: quite... |
383 |
struct pxa3xx_gcu_priv *priv = file_dev(file); |
364dbdf3b video: add driver... |
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 |
int words = count / 4; /* Does not need to be atomic. There's a lock in user space, * but anyhow, this is just for statistics. */ priv->shared->num_writes++; priv->shared->num_words += words; /* Last word reserved for batch buffer end command */ if (words >= PXA3XX_GCU_BATCH_WORDS) return -E2BIG; /* Wait for a free buffer */ if (!priv->free) { ret = pxa3xx_gcu_wait_free(priv); if (ret < 0) return ret; } /* * Get buffer from free list */ spin_lock_irqsave(&priv->spinlock, flags); buffer = priv->free; priv->free = buffer->next; spin_unlock_irqrestore(&priv->spinlock, flags); /* Copy data from user into buffer */ ret = copy_from_user(buffer->ptr, buff, words * 4); if (ret) { spin_lock_irqsave(&priv->spinlock, flags); buffer->next = priv->free; priv->free = buffer; spin_unlock_irqrestore(&priv->spinlock, flags); |
0b7f1cc79 video: pxa3xx-gcu... |
422 |
return -EFAULT; |
364dbdf3b video: add driver... |
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 |
} buffer->length = words; /* Append batch buffer end command */ buffer->ptr[words] = 0x01000000; /* * Add buffer to ready list */ spin_lock_irqsave(&priv->spinlock, flags); buffer->next = NULL; if (priv->ready) { BUG_ON(priv->ready_last == NULL); priv->ready_last->next = buffer; } else priv->ready = buffer; priv->ready_last = buffer; if (!priv->shared->hw_running) run_ready(priv); spin_unlock_irqrestore(&priv->spinlock, flags); return words * 4; } static long |
996142e61 pxa3xx-gcu: quite... |
456 |
pxa3xx_gcu_misc_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
364dbdf3b video: add driver... |
457 458 |
{ unsigned long flags; |
996142e61 pxa3xx-gcu: quite... |
459 |
struct pxa3xx_gcu_priv *priv = file_dev(file); |
364dbdf3b video: add driver... |
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 |
switch (cmd) { case PXA3XX_GCU_IOCTL_RESET: spin_lock_irqsave(&priv->spinlock, flags); pxa3xx_gcu_reset(priv); spin_unlock_irqrestore(&priv->spinlock, flags); return 0; case PXA3XX_GCU_IOCTL_WAIT_IDLE: return pxa3xx_gcu_wait_idle(priv); } return -ENOSYS; } static int |
996142e61 pxa3xx-gcu: quite... |
476 |
pxa3xx_gcu_misc_mmap(struct file *file, struct vm_area_struct *vma) |
364dbdf3b video: add driver... |
477 478 |
{ unsigned int size = vma->vm_end - vma->vm_start; |
996142e61 pxa3xx-gcu: quite... |
479 |
struct pxa3xx_gcu_priv *priv = file_dev(file); |
364dbdf3b video: add driver... |
480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 |
switch (vma->vm_pgoff) { case 0: /* hand out the shared data area */ if (size != SHARED_SIZE) return -EINVAL; return dma_mmap_coherent(NULL, vma, priv->shared, priv->shared_phys, size); case SHARED_SIZE >> PAGE_SHIFT: /* hand out the MMIO base for direct register access * from userspace */ if (size != resource_size(priv->resource_mem)) return -EINVAL; vma->vm_flags |= VM_IO; vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); return io_remap_pfn_range(vma, vma->vm_start, priv->resource_mem->start >> PAGE_SHIFT, size, vma->vm_page_prot); } return -EINVAL; } #ifdef PXA3XX_GCU_DEBUG_TIMER static struct timer_list pxa3xx_gcu_debug_timer; static void pxa3xx_gcu_debug_timedout(unsigned long ptr) { struct pxa3xx_gcu_priv *priv = (struct pxa3xx_gcu_priv *) ptr; QERROR("Timer DUMP"); /* init the timer structure */ init_timer(&pxa3xx_gcu_debug_timer); pxa3xx_gcu_debug_timer.function = pxa3xx_gcu_debug_timedout; pxa3xx_gcu_debug_timer.data = ptr; pxa3xx_gcu_debug_timer.expires = jiffies + 5*HZ; /* one second */ add_timer(&pxa3xx_gcu_debug_timer); } static void pxa3xx_gcu_init_debug_timer(void) { pxa3xx_gcu_debug_timedout((unsigned long) &pxa3xx_gcu_debug_timer); } #else static inline void pxa3xx_gcu_init_debug_timer(void) {} #endif static int add_buffer(struct platform_device *dev, struct pxa3xx_gcu_priv *priv) { struct pxa3xx_gcu_batch *buffer; buffer = kzalloc(sizeof(struct pxa3xx_gcu_batch), GFP_KERNEL); if (!buffer) return -ENOMEM; buffer->ptr = dma_alloc_coherent(&dev->dev, PXA3XX_GCU_BATCH_WORDS * 4, &buffer->phys, GFP_KERNEL); if (!buffer->ptr) { kfree(buffer); return -ENOMEM; } buffer->next = priv->free; priv->free = buffer; return 0; } static void free_buffers(struct platform_device *dev, struct pxa3xx_gcu_priv *priv) { struct pxa3xx_gcu_batch *next, *buffer = priv->free; while (buffer) { next = buffer->next; dma_free_coherent(&dev->dev, PXA3XX_GCU_BATCH_WORDS * 4, buffer->ptr, buffer->phys); kfree(buffer); buffer = next; } priv->free = NULL; } |
264bd6602 pxa3xx-gcu: stop ... |
577 578 579 580 581 582 |
static const struct file_operations misc_fops = { .owner = THIS_MODULE, .write = pxa3xx_gcu_misc_write, .unlocked_ioctl = pxa3xx_gcu_misc_ioctl, .mmap = pxa3xx_gcu_misc_mmap }; |
48c68c4f1 Drivers: video: r... |
583 |
static int pxa3xx_gcu_probe(struct platform_device *dev) |
364dbdf3b video: add driver... |
584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 |
{ int i, ret, irq; struct resource *r; struct pxa3xx_gcu_priv *priv; priv = kzalloc(sizeof(struct pxa3xx_gcu_priv), GFP_KERNEL); if (!priv) return -ENOMEM; for (i = 0; i < 8; i++) { ret = add_buffer(dev, priv); if (ret) { dev_err(&dev->dev, "failed to allocate DMA memory "); goto err_free_priv; } } init_waitqueue_head(&priv->wait_idle); init_waitqueue_head(&priv->wait_free); spin_lock_init(&priv->spinlock); /* we allocate the misc device structure as part of our own allocation, * so we can get a pointer to our priv structure later on with * container_of(). This isn't really necessary as we have a fixed minor * number anyway, but this is to avoid statics. */ |
364dbdf3b video: add driver... |
610 611 |
priv->misc_dev.minor = MISCDEV_MINOR, priv->misc_dev.name = DRV_NAME, |
264bd6602 pxa3xx-gcu: stop ... |
612 |
priv->misc_dev.fops = &misc_fops, |
364dbdf3b video: add driver... |
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 |
/* register misc device */ ret = misc_register(&priv->misc_dev); if (ret < 0) { dev_err(&dev->dev, "misc_register() for minor %d failed ", MISCDEV_MINOR); goto err_free_priv; } /* handle IO resources */ r = platform_get_resource(dev, IORESOURCE_MEM, 0); if (r == NULL) { dev_err(&dev->dev, "no I/O memory resource defined "); ret = -ENODEV; goto err_misc_deregister; } if (!request_mem_region(r->start, resource_size(r), dev->name)) { dev_err(&dev->dev, "failed to request I/O memory "); ret = -EBUSY; goto err_misc_deregister; } priv->mmio_base = ioremap_nocache(r->start, resource_size(r)); if (!priv->mmio_base) { dev_err(&dev->dev, "failed to map I/O memory "); ret = -EBUSY; goto err_free_mem_region; } /* allocate dma memory */ priv->shared = dma_alloc_coherent(&dev->dev, SHARED_SIZE, &priv->shared_phys, GFP_KERNEL); if (!priv->shared) { dev_err(&dev->dev, "failed to allocate DMA memory "); ret = -ENOMEM; goto err_free_io; } /* enable the clock */ priv->clk = clk_get(&dev->dev, NULL); if (IS_ERR(priv->clk)) { dev_err(&dev->dev, "failed to get clock "); ret = -ENODEV; goto err_free_dma; } ret = clk_enable(priv->clk); if (ret < 0) { dev_err(&dev->dev, "failed to enable clock "); goto err_put_clk; } /* request the IRQ */ irq = platform_get_irq(dev, 0); if (irq < 0) { dev_err(&dev->dev, "no IRQ defined "); ret = -ENODEV; goto err_put_clk; } ret = request_irq(irq, pxa3xx_gcu_handle_irq, |
f8798ccbe video: irq: Remov... |
684 |
0, DRV_NAME, priv); |
364dbdf3b video: add driver... |
685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 |
if (ret) { dev_err(&dev->dev, "request_irq failed "); ret = -EBUSY; goto err_put_clk; } platform_set_drvdata(dev, priv); priv->resource_mem = r; pxa3xx_gcu_reset(priv); pxa3xx_gcu_init_debug_timer(); dev_info(&dev->dev, "registered @0x%p, DMA 0x%p (%d bytes), IRQ %d ", (void *) r->start, (void *) priv->shared_phys, SHARED_SIZE, irq); return 0; err_put_clk: clk_disable(priv->clk); clk_put(priv->clk); err_free_dma: dma_free_coherent(&dev->dev, SHARED_SIZE, priv->shared, priv->shared_phys); err_free_io: iounmap(priv->mmio_base); err_free_mem_region: release_mem_region(r->start, resource_size(r)); err_misc_deregister: misc_deregister(&priv->misc_dev); err_free_priv: platform_set_drvdata(dev, NULL); free_buffers(dev, priv); kfree(priv); return ret; } |
48c68c4f1 Drivers: video: r... |
726 |
static int pxa3xx_gcu_remove(struct platform_device *dev) |
364dbdf3b video: add driver... |
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 |
{ struct pxa3xx_gcu_priv *priv = platform_get_drvdata(dev); struct resource *r = priv->resource_mem; pxa3xx_gcu_wait_idle(priv); misc_deregister(&priv->misc_dev); dma_free_coherent(&dev->dev, SHARED_SIZE, priv->shared, priv->shared_phys); iounmap(priv->mmio_base); release_mem_region(r->start, resource_size(r)); platform_set_drvdata(dev, NULL); clk_disable(priv->clk); free_buffers(dev, priv); kfree(priv); return 0; } static struct platform_driver pxa3xx_gcu_driver = { .probe = pxa3xx_gcu_probe, |
48c68c4f1 Drivers: video: r... |
748 |
.remove = pxa3xx_gcu_remove, |
364dbdf3b video: add driver... |
749 750 751 752 753 |
.driver = { .owner = THIS_MODULE, .name = DRV_NAME, }, }; |
4277f2c46 video: convert dr... |
754 |
module_platform_driver(pxa3xx_gcu_driver); |
364dbdf3b video: add driver... |
755 756 757 758 759 760 761 |
MODULE_DESCRIPTION("PXA3xx graphics controller unit driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(MISCDEV_MINOR); MODULE_AUTHOR("Janine Kropp <nin@directfb.org>, " "Denis Oliver Kropp <dok@directfb.org>, " "Daniel Mack <daniel@caiaq.de>"); |