| 1 | /* |
| 2 | saa7146.o - driver for generic saa7146-based hardware |
| 3 | |
| 4 | Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
| 23 | #include <media/saa7146.h> |
| 24 | #include <linux/module.h> |
| 25 | |
| 26 | static int saa7146_num; |
| 27 | |
| 28 | unsigned int saa7146_debug; |
| 29 | |
| 30 | module_param(saa7146_debug, uint, 0644); |
| 31 | MODULE_PARM_DESC(saa7146_debug, "debug level (default: 0)"); |
| 32 | |
| 33 | #if 0 |
| 34 | static void dump_registers(struct saa7146_dev* dev) |
| 35 | { |
| 36 | int i = 0; |
| 37 | |
| 38 | pr_info(" @ %li jiffies:\n", jiffies); |
| 39 | for (i = 0; i <= 0x148; i += 4) |
| 40 | pr_info("0x%03x: 0x%08x\n", i, saa7146_read(dev, i)); |
| 41 | } |
| 42 | #endif |
| 43 | |
| 44 | /**************************************************************************** |
| 45 | * gpio and debi helper functions |
| 46 | ****************************************************************************/ |
| 47 | |
| 48 | void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data) |
| 49 | { |
| 50 | u32 value = 0; |
| 51 | |
| 52 | BUG_ON(port > 3); |
| 53 | |
| 54 | value = saa7146_read(dev, GPIO_CTRL); |
| 55 | value &= ~(0xff << (8*port)); |
| 56 | value |= (data << (8*port)); |
| 57 | saa7146_write(dev, GPIO_CTRL, value); |
| 58 | } |
| 59 | |
| 60 | /* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */ |
| 61 | static inline int saa7146_wait_for_debi_done_sleep(struct saa7146_dev *dev, |
| 62 | unsigned long us1, unsigned long us2) |
| 63 | { |
| 64 | unsigned long timeout; |
| 65 | int err; |
| 66 | |
| 67 | /* wait for registers to be programmed */ |
| 68 | timeout = jiffies + usecs_to_jiffies(us1); |
| 69 | while (1) { |
| 70 | err = time_after(jiffies, timeout); |
| 71 | if (saa7146_read(dev, MC2) & 2) |
| 72 | break; |
| 73 | if (err) { |
| 74 | pr_err("%s: %s timed out while waiting for registers getting programmed\n", |
| 75 | dev->name, __func__); |
| 76 | return -ETIMEDOUT; |
| 77 | } |
| 78 | msleep(1); |
| 79 | } |
| 80 | |
| 81 | /* wait for transfer to complete */ |
| 82 | timeout = jiffies + usecs_to_jiffies(us2); |
| 83 | while (1) { |
| 84 | err = time_after(jiffies, timeout); |
| 85 | if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S)) |
| 86 | break; |
| 87 | saa7146_read(dev, MC2); |
| 88 | if (err) { |
| 89 | DEB_S("%s: %s timed out while waiting for transfer completion\n", |
| 90 | dev->name, __func__); |
| 91 | return -ETIMEDOUT; |
| 92 | } |
| 93 | msleep(1); |
| 94 | } |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static inline int saa7146_wait_for_debi_done_busyloop(struct saa7146_dev *dev, |
| 100 | unsigned long us1, unsigned long us2) |
| 101 | { |
| 102 | unsigned long loops; |
| 103 | |
| 104 | /* wait for registers to be programmed */ |
| 105 | loops = us1; |
| 106 | while (1) { |
| 107 | if (saa7146_read(dev, MC2) & 2) |
| 108 | break; |
| 109 | if (!loops--) { |
| 110 | pr_err("%s: %s timed out while waiting for registers getting programmed\n", |
| 111 | dev->name, __func__); |
| 112 | return -ETIMEDOUT; |
| 113 | } |
| 114 | udelay(1); |
| 115 | } |
| 116 | |
| 117 | /* wait for transfer to complete */ |
| 118 | loops = us2 / 5; |
| 119 | while (1) { |
| 120 | if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S)) |
| 121 | break; |
| 122 | saa7146_read(dev, MC2); |
| 123 | if (!loops--) { |
| 124 | DEB_S("%s: %s timed out while waiting for transfer completion\n", |
| 125 | dev->name, __func__); |
| 126 | return -ETIMEDOUT; |
| 127 | } |
| 128 | udelay(5); |
| 129 | } |
| 130 | |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop) |
| 135 | { |
| 136 | if (nobusyloop) |
| 137 | return saa7146_wait_for_debi_done_sleep(dev, 50000, 250000); |
| 138 | else |
| 139 | return saa7146_wait_for_debi_done_busyloop(dev, 50000, 250000); |
| 140 | } |
| 141 | |
| 142 | /**************************************************************************** |
| 143 | * general helper functions |
| 144 | ****************************************************************************/ |
| 145 | |
| 146 | /* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c |
| 147 | make sure virt has been allocated with vmalloc_32(), otherwise the BUG() |
| 148 | may be triggered on highmem machines */ |
| 149 | static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages) |
| 150 | { |
| 151 | struct scatterlist *sglist; |
| 152 | struct page *pg; |
| 153 | int i; |
| 154 | |
| 155 | sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL); |
| 156 | if (NULL == sglist) |
| 157 | return NULL; |
| 158 | sg_init_table(sglist, nr_pages); |
| 159 | for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) { |
| 160 | pg = vmalloc_to_page(virt); |
| 161 | if (NULL == pg) |
| 162 | goto err; |
| 163 | BUG_ON(PageHighMem(pg)); |
| 164 | sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); |
| 165 | } |
| 166 | return sglist; |
| 167 | |
| 168 | err: |
| 169 | kfree(sglist); |
| 170 | return NULL; |
| 171 | } |
| 172 | |
| 173 | /********************************************************************************/ |
| 174 | /* common page table functions */ |
| 175 | |
| 176 | void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt) |
| 177 | { |
| 178 | int pages = (length+PAGE_SIZE-1)/PAGE_SIZE; |
| 179 | void *mem = vmalloc_32(length); |
| 180 | int slen = 0; |
| 181 | |
| 182 | if (NULL == mem) |
| 183 | goto err_null; |
| 184 | |
| 185 | if (!(pt->slist = vmalloc_to_sg(mem, pages))) |
| 186 | goto err_free_mem; |
| 187 | |
| 188 | if (saa7146_pgtable_alloc(pci, pt)) |
| 189 | goto err_free_slist; |
| 190 | |
| 191 | pt->nents = pages; |
| 192 | slen = pci_map_sg(pci,pt->slist,pt->nents,PCI_DMA_FROMDEVICE); |
| 193 | if (0 == slen) |
| 194 | goto err_free_pgtable; |
| 195 | |
| 196 | if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen)) |
| 197 | goto err_unmap_sg; |
| 198 | |
| 199 | return mem; |
| 200 | |
| 201 | err_unmap_sg: |
| 202 | pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE); |
| 203 | err_free_pgtable: |
| 204 | saa7146_pgtable_free(pci, pt); |
| 205 | err_free_slist: |
| 206 | kfree(pt->slist); |
| 207 | pt->slist = NULL; |
| 208 | err_free_mem: |
| 209 | vfree(mem); |
| 210 | err_null: |
| 211 | return NULL; |
| 212 | } |
| 213 | |
| 214 | void saa7146_vfree_destroy_pgtable(struct pci_dev *pci, void *mem, struct saa7146_pgtable *pt) |
| 215 | { |
| 216 | pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE); |
| 217 | saa7146_pgtable_free(pci, pt); |
| 218 | kfree(pt->slist); |
| 219 | pt->slist = NULL; |
| 220 | vfree(mem); |
| 221 | } |
| 222 | |
| 223 | void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt) |
| 224 | { |
| 225 | if (NULL == pt->cpu) |
| 226 | return; |
| 227 | pci_free_consistent(pci, pt->size, pt->cpu, pt->dma); |
| 228 | pt->cpu = NULL; |
| 229 | } |
| 230 | |
| 231 | int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) |
| 232 | { |
| 233 | __le32 *cpu; |
| 234 | dma_addr_t dma_addr = 0; |
| 235 | |
| 236 | cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr); |
| 237 | if (NULL == cpu) { |
| 238 | return -ENOMEM; |
| 239 | } |
| 240 | pt->size = PAGE_SIZE; |
| 241 | pt->cpu = cpu; |
| 242 | pt->dma = dma_addr; |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, |
| 248 | struct scatterlist *list, int sglen ) |
| 249 | { |
| 250 | __le32 *ptr, fill; |
| 251 | int nr_pages = 0; |
| 252 | int i,p; |
| 253 | |
| 254 | BUG_ON(0 == sglen); |
| 255 | BUG_ON(list->offset > PAGE_SIZE); |
| 256 | |
| 257 | /* if we have a user buffer, the first page may not be |
| 258 | aligned to a page boundary. */ |
| 259 | pt->offset = list->offset; |
| 260 | |
| 261 | ptr = pt->cpu; |
| 262 | for (i = 0; i < sglen; i++, list++) { |
| 263 | /* |
| 264 | pr_debug("i:%d, adr:0x%08x, len:%d, offset:%d\n", |
| 265 | i, sg_dma_address(list), sg_dma_len(list), |
| 266 | list->offset); |
| 267 | */ |
| 268 | for (p = 0; p * 4096 < list->length; p++, ptr++) { |
| 269 | *ptr = cpu_to_le32(sg_dma_address(list) + p * 4096); |
| 270 | nr_pages++; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | |
| 275 | /* safety; fill the page table up with the last valid page */ |
| 276 | fill = *(ptr-1); |
| 277 | for(i=nr_pages;i<1024;i++) { |
| 278 | *ptr++ = fill; |
| 279 | } |
| 280 | |
| 281 | /* |
| 282 | ptr = pt->cpu; |
| 283 | pr_debug("offset: %d\n", pt->offset); |
| 284 | for(i=0;i<5;i++) { |
| 285 | pr_debug("ptr1 %d: 0x%08x\n", i, ptr[i]); |
| 286 | } |
| 287 | */ |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | /********************************************************************************/ |
| 292 | /* interrupt handler */ |
| 293 | static irqreturn_t interrupt_hw(int irq, void *dev_id) |
| 294 | { |
| 295 | struct saa7146_dev *dev = dev_id; |
| 296 | u32 isr; |
| 297 | u32 ack_isr; |
| 298 | |
| 299 | /* read out the interrupt status register */ |
| 300 | ack_isr = isr = saa7146_read(dev, ISR); |
| 301 | |
| 302 | /* is this our interrupt? */ |
| 303 | if ( 0 == isr ) { |
| 304 | /* nope, some other device */ |
| 305 | return IRQ_NONE; |
| 306 | } |
| 307 | |
| 308 | if (dev->ext) { |
| 309 | if (dev->ext->irq_mask & isr) { |
| 310 | if (dev->ext->irq_func) |
| 311 | dev->ext->irq_func(dev, &isr); |
| 312 | isr &= ~dev->ext->irq_mask; |
| 313 | } |
| 314 | } |
| 315 | if (0 != (isr & (MASK_27))) { |
| 316 | DEB_INT("irq: RPS0 (0x%08x)\n", isr); |
| 317 | if (dev->vv_data && dev->vv_callback) |
| 318 | dev->vv_callback(dev,isr); |
| 319 | isr &= ~MASK_27; |
| 320 | } |
| 321 | if (0 != (isr & (MASK_28))) { |
| 322 | if (dev->vv_data && dev->vv_callback) |
| 323 | dev->vv_callback(dev,isr); |
| 324 | isr &= ~MASK_28; |
| 325 | } |
| 326 | if (0 != (isr & (MASK_16|MASK_17))) { |
| 327 | SAA7146_IER_DISABLE(dev, MASK_16|MASK_17); |
| 328 | /* only wake up if we expect something */ |
| 329 | if (0 != dev->i2c_op) { |
| 330 | dev->i2c_op = 0; |
| 331 | wake_up(&dev->i2c_wq); |
| 332 | } else { |
| 333 | u32 psr = saa7146_read(dev, PSR); |
| 334 | u32 ssr = saa7146_read(dev, SSR); |
| 335 | pr_warn("%s: unexpected i2c irq: isr %08x psr %08x ssr %08x\n", |
| 336 | dev->name, isr, psr, ssr); |
| 337 | } |
| 338 | isr &= ~(MASK_16|MASK_17); |
| 339 | } |
| 340 | if( 0 != isr ) { |
| 341 | ERR("warning: interrupt enabled, but not handled properly.(0x%08x)\n", |
| 342 | isr); |
| 343 | ERR("disabling interrupt source(s)!\n"); |
| 344 | SAA7146_IER_DISABLE(dev,isr); |
| 345 | } |
| 346 | saa7146_write(dev, ISR, ack_isr); |
| 347 | return IRQ_HANDLED; |
| 348 | } |
| 349 | |
| 350 | /*********************************************************************************/ |
| 351 | /* configuration-functions */ |
| 352 | |
| 353 | static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent) |
| 354 | { |
| 355 | struct saa7146_pci_extension_data *pci_ext = (struct saa7146_pci_extension_data *)ent->driver_data; |
| 356 | struct saa7146_extension *ext = pci_ext->ext; |
| 357 | struct saa7146_dev *dev; |
| 358 | int err = -ENOMEM; |
| 359 | |
| 360 | /* clear out mem for sure */ |
| 361 | dev = kzalloc(sizeof(struct saa7146_dev), GFP_KERNEL); |
| 362 | if (!dev) { |
| 363 | ERR("out of memory\n"); |
| 364 | goto out; |
| 365 | } |
| 366 | |
| 367 | DEB_EE("pci:%p\n", pci); |
| 368 | |
| 369 | err = pci_enable_device(pci); |
| 370 | if (err < 0) { |
| 371 | ERR("pci_enable_device() failed\n"); |
| 372 | goto err_free; |
| 373 | } |
| 374 | |
| 375 | /* enable bus-mastering */ |
| 376 | pci_set_master(pci); |
| 377 | |
| 378 | dev->pci = pci; |
| 379 | |
| 380 | /* get chip-revision; this is needed to enable bug-fixes */ |
| 381 | dev->revision = pci->revision; |
| 382 | |
| 383 | /* remap the memory from virtual to physical address */ |
| 384 | |
| 385 | err = pci_request_region(pci, 0, "saa7146"); |
| 386 | if (err < 0) |
| 387 | goto err_disable; |
| 388 | |
| 389 | dev->mem = ioremap(pci_resource_start(pci, 0), |
| 390 | pci_resource_len(pci, 0)); |
| 391 | if (!dev->mem) { |
| 392 | ERR("ioremap() failed\n"); |
| 393 | err = -ENODEV; |
| 394 | goto err_release; |
| 395 | } |
| 396 | |
| 397 | /* we don't do a master reset here anymore, it screws up |
| 398 | some boards that don't have an i2c-eeprom for configuration |
| 399 | values */ |
| 400 | /* |
| 401 | saa7146_write(dev, MC1, MASK_31); |
| 402 | */ |
| 403 | |
| 404 | /* disable all irqs */ |
| 405 | saa7146_write(dev, IER, 0); |
| 406 | |
| 407 | /* shut down all dma transfers and rps tasks */ |
| 408 | saa7146_write(dev, MC1, 0x30ff0000); |
| 409 | |
| 410 | /* clear out any rps-signals pending */ |
| 411 | saa7146_write(dev, MC2, 0xf8000000); |
| 412 | |
| 413 | /* request an interrupt for the saa7146 */ |
| 414 | err = request_irq(pci->irq, interrupt_hw, IRQF_SHARED | IRQF_DISABLED, |
| 415 | dev->name, dev); |
| 416 | if (err < 0) { |
| 417 | ERR("request_irq() failed\n"); |
| 418 | goto err_unmap; |
| 419 | } |
| 420 | |
| 421 | err = -ENOMEM; |
| 422 | |
| 423 | /* get memory for various stuff */ |
| 424 | dev->d_rps0.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 425 | &dev->d_rps0.dma_handle); |
| 426 | if (!dev->d_rps0.cpu_addr) |
| 427 | goto err_free_irq; |
| 428 | memset(dev->d_rps0.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 429 | |
| 430 | dev->d_rps1.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 431 | &dev->d_rps1.dma_handle); |
| 432 | if (!dev->d_rps1.cpu_addr) |
| 433 | goto err_free_rps0; |
| 434 | memset(dev->d_rps1.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 435 | |
| 436 | dev->d_i2c.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 437 | &dev->d_i2c.dma_handle); |
| 438 | if (!dev->d_i2c.cpu_addr) |
| 439 | goto err_free_rps1; |
| 440 | memset(dev->d_i2c.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 441 | |
| 442 | /* the rest + print status message */ |
| 443 | |
| 444 | /* create a nice device name */ |
| 445 | sprintf(dev->name, "saa7146 (%d)", saa7146_num); |
| 446 | |
| 447 | pr_info("found saa7146 @ mem %p (revision %d, irq %d) (0x%04x,0x%04x)\n", |
| 448 | dev->mem, dev->revision, pci->irq, |
| 449 | pci->subsystem_vendor, pci->subsystem_device); |
| 450 | dev->ext = ext; |
| 451 | |
| 452 | mutex_init(&dev->v4l2_lock); |
| 453 | spin_lock_init(&dev->int_slock); |
| 454 | spin_lock_init(&dev->slock); |
| 455 | |
| 456 | mutex_init(&dev->i2c_lock); |
| 457 | |
| 458 | dev->module = THIS_MODULE; |
| 459 | init_waitqueue_head(&dev->i2c_wq); |
| 460 | |
| 461 | /* set some sane pci arbitrition values */ |
| 462 | saa7146_write(dev, PCI_BT_V1, 0x1c00101f); |
| 463 | |
| 464 | /* TODO: use the status code of the callback */ |
| 465 | |
| 466 | err = -ENODEV; |
| 467 | |
| 468 | if (ext->probe && ext->probe(dev)) { |
| 469 | DEB_D("ext->probe() failed for %p. skipping device.\n", dev); |
| 470 | goto err_free_i2c; |
| 471 | } |
| 472 | |
| 473 | if (ext->attach(dev, pci_ext)) { |
| 474 | DEB_D("ext->attach() failed for %p. skipping device.\n", dev); |
| 475 | goto err_free_i2c; |
| 476 | } |
| 477 | /* V4L extensions will set the pci drvdata to the v4l2_device in the |
| 478 | attach() above. So for those cards that do not use V4L we have to |
| 479 | set it explicitly. */ |
| 480 | pci_set_drvdata(pci, &dev->v4l2_dev); |
| 481 | |
| 482 | saa7146_num++; |
| 483 | |
| 484 | err = 0; |
| 485 | out: |
| 486 | return err; |
| 487 | |
| 488 | err_free_i2c: |
| 489 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr, |
| 490 | dev->d_i2c.dma_handle); |
| 491 | err_free_rps1: |
| 492 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr, |
| 493 | dev->d_rps1.dma_handle); |
| 494 | err_free_rps0: |
| 495 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr, |
| 496 | dev->d_rps0.dma_handle); |
| 497 | err_free_irq: |
| 498 | free_irq(pci->irq, (void *)dev); |
| 499 | err_unmap: |
| 500 | iounmap(dev->mem); |
| 501 | err_release: |
| 502 | pci_release_region(pci, 0); |
| 503 | err_disable: |
| 504 | pci_disable_device(pci); |
| 505 | err_free: |
| 506 | kfree(dev); |
| 507 | goto out; |
| 508 | } |
| 509 | |
| 510 | static void saa7146_remove_one(struct pci_dev *pdev) |
| 511 | { |
| 512 | struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); |
| 513 | struct saa7146_dev *dev = to_saa7146_dev(v4l2_dev); |
| 514 | struct { |
| 515 | void *addr; |
| 516 | dma_addr_t dma; |
| 517 | } dev_map[] = { |
| 518 | { dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle }, |
| 519 | { dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle }, |
| 520 | { dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle }, |
| 521 | { NULL, 0 } |
| 522 | }, *p; |
| 523 | |
| 524 | DEB_EE("dev:%p\n", dev); |
| 525 | |
| 526 | dev->ext->detach(dev); |
| 527 | /* Zero the PCI drvdata after use. */ |
| 528 | pci_set_drvdata(pdev, NULL); |
| 529 | |
| 530 | /* shut down all video dma transfers */ |
| 531 | saa7146_write(dev, MC1, 0x00ff0000); |
| 532 | |
| 533 | /* disable all irqs, release irq-routine */ |
| 534 | saa7146_write(dev, IER, 0); |
| 535 | |
| 536 | free_irq(pdev->irq, dev); |
| 537 | |
| 538 | for (p = dev_map; p->addr; p++) |
| 539 | pci_free_consistent(pdev, SAA7146_RPS_MEM, p->addr, p->dma); |
| 540 | |
| 541 | iounmap(dev->mem); |
| 542 | pci_release_region(pdev, 0); |
| 543 | pci_disable_device(pdev); |
| 544 | kfree(dev); |
| 545 | |
| 546 | saa7146_num--; |
| 547 | } |
| 548 | |
| 549 | /*********************************************************************************/ |
| 550 | /* extension handling functions */ |
| 551 | |
| 552 | int saa7146_register_extension(struct saa7146_extension* ext) |
| 553 | { |
| 554 | DEB_EE("ext:%p\n", ext); |
| 555 | |
| 556 | ext->driver.name = ext->name; |
| 557 | ext->driver.id_table = ext->pci_tbl; |
| 558 | ext->driver.probe = saa7146_init_one; |
| 559 | ext->driver.remove = saa7146_remove_one; |
| 560 | |
| 561 | pr_info("register extension '%s'\n", ext->name); |
| 562 | return pci_register_driver(&ext->driver); |
| 563 | } |
| 564 | |
| 565 | int saa7146_unregister_extension(struct saa7146_extension* ext) |
| 566 | { |
| 567 | DEB_EE("ext:%p\n", ext); |
| 568 | pr_info("unregister extension '%s'\n", ext->name); |
| 569 | pci_unregister_driver(&ext->driver); |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | EXPORT_SYMBOL_GPL(saa7146_register_extension); |
| 574 | EXPORT_SYMBOL_GPL(saa7146_unregister_extension); |
| 575 | |
| 576 | /* misc functions used by extension modules */ |
| 577 | EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc); |
| 578 | EXPORT_SYMBOL_GPL(saa7146_pgtable_free); |
| 579 | EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single); |
| 580 | EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable); |
| 581 | EXPORT_SYMBOL_GPL(saa7146_vfree_destroy_pgtable); |
| 582 | EXPORT_SYMBOL_GPL(saa7146_wait_for_debi_done); |
| 583 | |
| 584 | EXPORT_SYMBOL_GPL(saa7146_setgpio); |
| 585 | |
| 586 | EXPORT_SYMBOL_GPL(saa7146_i2c_adapter_prepare); |
| 587 | |
| 588 | EXPORT_SYMBOL_GPL(saa7146_debug); |
| 589 | |
| 590 | MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); |
| 591 | MODULE_DESCRIPTION("driver for generic saa7146-based hardware"); |
| 592 | MODULE_LICENSE("GPL"); |