1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 1998-2009 VIA Technologies, Inc. All Rights Reserved.
4 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
5 * Copyright 2009 Jonathan Corbet <corbet@lwn.net>
6 */
7
8 /*
9 * Core code for the Via multifunction framebuffer device.
10 */
11 #include <linux/via-core.h>
12 #include <linux/via_i2c.h>
13 #include <linux/via-gpio.h>
14 #include "global.h"
15
16 #include <linux/module.h>
17 #include <linux/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <linux/list.h>
20 #include <linux/pm.h>
21
22 /*
23 * The default port config.
24 */
25 static struct via_port_cfg adap_configs[] = {
26 [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
27 [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
28 [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
29 [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
30 [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
31 { 0, 0, 0, 0 }
32 };
33
34 /*
35 * The OLPC XO-1.5 puts the camera power and reset lines onto
36 * GPIO 2C.
37 */
38 static struct via_port_cfg olpc_adap_configs[] = {
39 [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
40 [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
41 [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
42 [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c },
43 [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
44 { 0, 0, 0, 0 }
45 };
46
47 /*
48 * We currently only support one viafb device (will there ever be
49 * more than one?), so just declare it globally here.
50 */
51 static struct viafb_dev global_dev;
52
53
54 /*
55 * Basic register access; spinlock required.
56 */
viafb_mmio_write(int reg,u32 v)57 static inline void viafb_mmio_write(int reg, u32 v)
58 {
59 iowrite32(v, global_dev.engine_mmio + reg);
60 }
61
viafb_mmio_read(int reg)62 static inline int viafb_mmio_read(int reg)
63 {
64 return ioread32(global_dev.engine_mmio + reg);
65 }
66
67 /* ---------------------------------------------------------------------- */
68 /*
69 * Interrupt management. We have a single IRQ line for a lot of
70 * different functions, so we need to share it. The design here
71 * is that we don't want to reimplement the shared IRQ code here;
72 * we also want to avoid having contention for a single handler thread.
73 * So each subdev driver which needs interrupts just requests
74 * them directly from the kernel. We just have what's needed for
75 * overall access to the interrupt control register.
76 */
77
78 /*
79 * Which interrupts are enabled now?
80 */
81 static u32 viafb_enabled_ints;
82
viafb_int_init(void)83 static void viafb_int_init(void)
84 {
85 viafb_enabled_ints = 0;
86
87 viafb_mmio_write(VDE_INTERRUPT, 0);
88 }
89
90 /*
91 * Allow subdevs to ask for specific interrupts to be enabled. These
92 * functions must be called with reg_lock held
93 */
viafb_irq_enable(u32 mask)94 void viafb_irq_enable(u32 mask)
95 {
96 viafb_enabled_ints |= mask;
97 viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
98 }
99 EXPORT_SYMBOL_GPL(viafb_irq_enable);
100
viafb_irq_disable(u32 mask)101 void viafb_irq_disable(u32 mask)
102 {
103 viafb_enabled_ints &= ~mask;
104 if (viafb_enabled_ints == 0)
105 viafb_mmio_write(VDE_INTERRUPT, 0); /* Disable entirely */
106 else
107 viafb_mmio_write(VDE_INTERRUPT,
108 viafb_enabled_ints | VDE_I_ENABLE);
109 }
110 EXPORT_SYMBOL_GPL(viafb_irq_disable);
111
112 /* ---------------------------------------------------------------------- */
113 /*
114 * Currently, the camera driver is the only user of the DMA code, so we
115 * only compile it in if the camera driver is being built. Chances are,
116 * most viafb systems will not need to have this extra code for a while.
117 * As soon as another user comes long, the ifdef can be removed.
118 */
119 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
120 /*
121 * Access to the DMA engine. This currently provides what the camera
122 * driver needs (i.e. outgoing only) but is easily expandable if need
123 * be.
124 */
125
126 /*
127 * There are four DMA channels in the vx855. For now, we only
128 * use one of them, though. Most of the time, the DMA channel
129 * will be idle, so we keep the IRQ handler unregistered except
130 * when some subsystem has indicated an interest.
131 */
132 static int viafb_dma_users;
133 static DECLARE_COMPLETION(viafb_dma_completion);
134 /*
135 * This mutex protects viafb_dma_users and our global interrupt
136 * registration state; it also serializes access to the DMA
137 * engine.
138 */
139 static DEFINE_MUTEX(viafb_dma_lock);
140
141 /*
142 * The VX855 DMA descriptor (used for s/g transfers) looks
143 * like this.
144 */
145 struct viafb_vx855_dma_descr {
146 u32 addr_low; /* Low part of phys addr */
147 u32 addr_high; /* High 12 bits of addr */
148 u32 fb_offset; /* Offset into FB memory */
149 u32 seg_size; /* Size, 16-byte units */
150 u32 tile_mode; /* "tile mode" setting */
151 u32 next_desc_low; /* Next descriptor addr */
152 u32 next_desc_high;
153 u32 pad; /* Fill out to 64 bytes */
154 };
155
156 /*
157 * Flags added to the "next descriptor low" pointers
158 */
159 #define VIAFB_DMA_MAGIC 0x01 /* ??? Just has to be there */
160 #define VIAFB_DMA_FINAL_SEGMENT 0x02 /* Final segment */
161
162 /*
163 * The completion IRQ handler.
164 */
viafb_dma_irq(int irq,void * data)165 static irqreturn_t viafb_dma_irq(int irq, void *data)
166 {
167 int csr;
168 irqreturn_t ret = IRQ_NONE;
169
170 spin_lock(&global_dev.reg_lock);
171 csr = viafb_mmio_read(VDMA_CSR0);
172 if (csr & VDMA_C_DONE) {
173 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
174 complete(&viafb_dma_completion);
175 ret = IRQ_HANDLED;
176 }
177 spin_unlock(&global_dev.reg_lock);
178 return ret;
179 }
180
181 /*
182 * Indicate a need for DMA functionality.
183 */
viafb_request_dma(void)184 int viafb_request_dma(void)
185 {
186 int ret = 0;
187
188 /*
189 * Only VX855 is supported currently.
190 */
191 if (global_dev.chip_type != UNICHROME_VX855)
192 return -ENODEV;
193 /*
194 * Note the new user and set up our interrupt handler
195 * if need be.
196 */
197 mutex_lock(&viafb_dma_lock);
198 viafb_dma_users++;
199 if (viafb_dma_users == 1) {
200 ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
201 IRQF_SHARED, "via-dma", &viafb_dma_users);
202 if (ret)
203 viafb_dma_users--;
204 else
205 viafb_irq_enable(VDE_I_DMA0TDEN);
206 }
207 mutex_unlock(&viafb_dma_lock);
208 return ret;
209 }
210 EXPORT_SYMBOL_GPL(viafb_request_dma);
211
viafb_release_dma(void)212 void viafb_release_dma(void)
213 {
214 mutex_lock(&viafb_dma_lock);
215 viafb_dma_users--;
216 if (viafb_dma_users == 0) {
217 viafb_irq_disable(VDE_I_DMA0TDEN);
218 free_irq(global_dev.pdev->irq, &viafb_dma_users);
219 }
220 mutex_unlock(&viafb_dma_lock);
221 }
222 EXPORT_SYMBOL_GPL(viafb_release_dma);
223
224 /*
225 * Do a scatter/gather DMA copy from FB memory. You must have done
226 * a successful call to viafb_request_dma() first.
227 */
viafb_dma_copy_out_sg(unsigned int offset,struct scatterlist * sg,int nsg)228 int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
229 {
230 struct viafb_vx855_dma_descr *descr;
231 void *descrpages;
232 dma_addr_t descr_handle;
233 unsigned long flags;
234 int i;
235 struct scatterlist *sgentry;
236 dma_addr_t nextdesc;
237
238 /*
239 * Get a place to put the descriptors.
240 */
241 descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
242 nsg*sizeof(struct viafb_vx855_dma_descr),
243 &descr_handle, GFP_KERNEL);
244 if (descrpages == NULL) {
245 dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
246 return -ENOMEM;
247 }
248 mutex_lock(&viafb_dma_lock);
249 /*
250 * Fill them in.
251 */
252 descr = descrpages;
253 nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
254 for_each_sg(sg, sgentry, nsg, i) {
255 dma_addr_t paddr = sg_dma_address(sgentry);
256 descr->addr_low = paddr & 0xfffffff0;
257 descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
258 descr->fb_offset = offset;
259 descr->seg_size = sg_dma_len(sgentry) >> 4;
260 descr->tile_mode = 0;
261 descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
262 descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
263 descr->pad = 0xffffffff; /* VIA driver does this */
264 offset += sg_dma_len(sgentry);
265 nextdesc += sizeof(struct viafb_vx855_dma_descr);
266 descr++;
267 }
268 descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
269 /*
270 * Program the engine.
271 */
272 spin_lock_irqsave(&global_dev.reg_lock, flags);
273 init_completion(&viafb_dma_completion);
274 viafb_mmio_write(VDMA_DQWCR0, 0);
275 viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
276 viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
277 viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
278 viafb_mmio_write(VDMA_DPRH0,
279 (((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
280 (void) viafb_mmio_read(VDMA_CSR0);
281 viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
282 spin_unlock_irqrestore(&global_dev.reg_lock, flags);
283 /*
284 * Now we just wait until the interrupt handler says
285 * we're done. Except that, actually, we need to wait a little
286 * longer: the interrupts seem to jump the gun a little and we
287 * get corrupted frames sometimes.
288 */
289 wait_for_completion_timeout(&viafb_dma_completion, 1);
290 msleep(1);
291 if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
292 printk(KERN_ERR "VIA DMA timeout!\n");
293 /*
294 * Clean up and we're done.
295 */
296 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
297 viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
298 mutex_unlock(&viafb_dma_lock);
299 dma_free_coherent(&global_dev.pdev->dev,
300 nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
301 descr_handle);
302 return 0;
303 }
304 EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
305 #endif /* CONFIG_VIDEO_VIA_CAMERA */
306
307 /* ---------------------------------------------------------------------- */
308 /*
309 * Figure out how big our framebuffer memory is. Kind of ugly,
310 * but evidently we can't trust the information found in the
311 * fbdev configuration area.
312 */
313 static u16 via_function3[] = {
314 CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
315 CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
316 P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3, VX900_FUNCTION3,
317 };
318
319 /* Get the BIOS-configured framebuffer size from PCI configuration space
320 * of function 3 in the respective chipset */
viafb_get_fb_size_from_pci(int chip_type)321 static int viafb_get_fb_size_from_pci(int chip_type)
322 {
323 int i;
324 u8 offset = 0;
325 u32 FBSize;
326 u32 VideoMemSize;
327
328 /* search for the "FUNCTION3" device in this chipset */
329 for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
330 struct pci_dev *pdev;
331
332 pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
333 NULL);
334 if (!pdev)
335 continue;
336
337 DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
338
339 switch (pdev->device) {
340 case CLE266_FUNCTION3:
341 case KM400_FUNCTION3:
342 offset = 0xE0;
343 break;
344 case CN400_FUNCTION3:
345 case CN700_FUNCTION3:
346 case CX700_FUNCTION3:
347 case KM800_FUNCTION3:
348 case KM890_FUNCTION3:
349 case P4M890_FUNCTION3:
350 case P4M900_FUNCTION3:
351 case VX800_FUNCTION3:
352 case VX855_FUNCTION3:
353 case VX900_FUNCTION3:
354 /*case CN750_FUNCTION3: */
355 offset = 0xA0;
356 break;
357 }
358
359 if (!offset)
360 break;
361
362 pci_read_config_dword(pdev, offset, &FBSize);
363 pci_dev_put(pdev);
364 }
365
366 if (!offset) {
367 printk(KERN_ERR "cannot determine framebuffer size\n");
368 return -EIO;
369 }
370
371 FBSize = FBSize & 0x00007000;
372 DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
373
374 if (chip_type < UNICHROME_CX700) {
375 switch (FBSize) {
376 case 0x00004000:
377 VideoMemSize = (16 << 20); /*16M */
378 break;
379
380 case 0x00005000:
381 VideoMemSize = (32 << 20); /*32M */
382 break;
383
384 case 0x00006000:
385 VideoMemSize = (64 << 20); /*64M */
386 break;
387
388 default:
389 VideoMemSize = (32 << 20); /*32M */
390 break;
391 }
392 } else {
393 switch (FBSize) {
394 case 0x00001000:
395 VideoMemSize = (8 << 20); /*8M */
396 break;
397
398 case 0x00002000:
399 VideoMemSize = (16 << 20); /*16M */
400 break;
401
402 case 0x00003000:
403 VideoMemSize = (32 << 20); /*32M */
404 break;
405
406 case 0x00004000:
407 VideoMemSize = (64 << 20); /*64M */
408 break;
409
410 case 0x00005000:
411 VideoMemSize = (128 << 20); /*128M */
412 break;
413
414 case 0x00006000:
415 VideoMemSize = (256 << 20); /*256M */
416 break;
417
418 case 0x00007000: /* Only on VX855/875 */
419 VideoMemSize = (512 << 20); /*512M */
420 break;
421
422 default:
423 VideoMemSize = (32 << 20); /*32M */
424 break;
425 }
426 }
427
428 return VideoMemSize;
429 }
430
431
432 /*
433 * Figure out and map our MMIO regions.
434 */
via_pci_setup_mmio(struct viafb_dev * vdev)435 static int via_pci_setup_mmio(struct viafb_dev *vdev)
436 {
437 int ret;
438 /*
439 * Hook up to the device registers. Note that we soldier
440 * on if it fails; the framebuffer can operate (without
441 * acceleration) without this region.
442 */
443 vdev->engine_start = pci_resource_start(vdev->pdev, 1);
444 vdev->engine_len = pci_resource_len(vdev->pdev, 1);
445 vdev->engine_mmio = ioremap(vdev->engine_start,
446 vdev->engine_len);
447 if (vdev->engine_mmio == NULL)
448 dev_err(&vdev->pdev->dev,
449 "Unable to map engine MMIO; operation will be "
450 "slow and crippled.\n");
451 /*
452 * Map in framebuffer memory. For now, failure here is
453 * fatal. Unfortunately, in the absence of significant
454 * vmalloc space, failure here is also entirely plausible.
455 * Eventually we want to move away from mapping this
456 * entire region.
457 */
458 if (vdev->chip_type == UNICHROME_VX900)
459 vdev->fbmem_start = pci_resource_start(vdev->pdev, 2);
460 else
461 vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
462 ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
463 if (ret < 0)
464 goto out_unmap;
465
466 /* try to map less memory on failure, 8 MB should be still enough */
467 for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
468 vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
469 if (vdev->fbmem)
470 break;
471 }
472
473 if (vdev->fbmem == NULL) {
474 ret = -ENOMEM;
475 goto out_unmap;
476 }
477 return 0;
478 out_unmap:
479 iounmap(vdev->engine_mmio);
480 return ret;
481 }
482
via_pci_teardown_mmio(struct viafb_dev * vdev)483 static void via_pci_teardown_mmio(struct viafb_dev *vdev)
484 {
485 iounmap(vdev->fbmem);
486 iounmap(vdev->engine_mmio);
487 }
488
489 /*
490 * Create our subsidiary devices.
491 */
492 static struct viafb_subdev_info {
493 char *name;
494 struct platform_device *platdev;
495 } viafb_subdevs[] = {
496 {
497 .name = "viafb-gpio",
498 },
499 {
500 .name = "viafb-i2c",
501 },
502 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
503 {
504 .name = "viafb-camera",
505 },
506 #endif
507 };
508 #define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
509
via_create_subdev(struct viafb_dev * vdev,struct viafb_subdev_info * info)510 static int via_create_subdev(struct viafb_dev *vdev,
511 struct viafb_subdev_info *info)
512 {
513 int ret;
514
515 info->platdev = platform_device_alloc(info->name, -1);
516 if (!info->platdev) {
517 dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
518 info->name);
519 return -ENOMEM;
520 }
521 info->platdev->dev.parent = &vdev->pdev->dev;
522 info->platdev->dev.platform_data = vdev;
523 ret = platform_device_add(info->platdev);
524 if (ret) {
525 dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
526 info->name);
527 platform_device_put(info->platdev);
528 info->platdev = NULL;
529 }
530 return ret;
531 }
532
via_setup_subdevs(struct viafb_dev * vdev)533 static int via_setup_subdevs(struct viafb_dev *vdev)
534 {
535 int i;
536
537 /*
538 * Ignore return values. Even if some of the devices
539 * fail to be created, we'll still be able to use some
540 * of the rest.
541 */
542 for (i = 0; i < N_SUBDEVS; i++)
543 via_create_subdev(vdev, viafb_subdevs + i);
544 return 0;
545 }
546
via_teardown_subdevs(void)547 static void via_teardown_subdevs(void)
548 {
549 int i;
550
551 for (i = 0; i < N_SUBDEVS; i++)
552 if (viafb_subdevs[i].platdev) {
553 viafb_subdevs[i].platdev->dev.platform_data = NULL;
554 platform_device_unregister(viafb_subdevs[i].platdev);
555 }
556 }
557
558 /*
559 * Power management functions
560 */
561 static __maybe_unused LIST_HEAD(viafb_pm_hooks);
562 static __maybe_unused DEFINE_MUTEX(viafb_pm_hooks_lock);
563
viafb_pm_register(struct viafb_pm_hooks * hooks)564 void viafb_pm_register(struct viafb_pm_hooks *hooks)
565 {
566 INIT_LIST_HEAD(&hooks->list);
567
568 mutex_lock(&viafb_pm_hooks_lock);
569 list_add_tail(&hooks->list, &viafb_pm_hooks);
570 mutex_unlock(&viafb_pm_hooks_lock);
571 }
572 EXPORT_SYMBOL_GPL(viafb_pm_register);
573
viafb_pm_unregister(struct viafb_pm_hooks * hooks)574 void viafb_pm_unregister(struct viafb_pm_hooks *hooks)
575 {
576 mutex_lock(&viafb_pm_hooks_lock);
577 list_del(&hooks->list);
578 mutex_unlock(&viafb_pm_hooks_lock);
579 }
580 EXPORT_SYMBOL_GPL(viafb_pm_unregister);
581
via_suspend(struct device * dev)582 static int __maybe_unused via_suspend(struct device *dev)
583 {
584 struct viafb_pm_hooks *hooks;
585
586 /*
587 * "I've occasionally hit a few drivers that caused suspend
588 * failures, and each and every time it was a driver bug, and
589 * the right thing to do was to just ignore the error and suspend
590 * anyway - returning an error code and trying to undo the suspend
591 * is not what anybody ever really wants, even if our model
592 *_allows_ for it."
593 * -- Linus Torvalds, Dec. 7, 2009
594 */
595 mutex_lock(&viafb_pm_hooks_lock);
596 list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list)
597 hooks->suspend(hooks->private);
598 mutex_unlock(&viafb_pm_hooks_lock);
599
600 return 0;
601 }
602
via_resume(struct device * dev)603 static int __maybe_unused via_resume(struct device *dev)
604 {
605 struct viafb_pm_hooks *hooks;
606
607 /* Now bring back any subdevs */
608 mutex_lock(&viafb_pm_hooks_lock);
609 list_for_each_entry(hooks, &viafb_pm_hooks, list)
610 hooks->resume(hooks->private);
611 mutex_unlock(&viafb_pm_hooks_lock);
612
613 return 0;
614 }
615
via_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)616 static int via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
617 {
618 int ret;
619
620 ret = pci_enable_device(pdev);
621 if (ret)
622 return ret;
623
624 /*
625 * Global device initialization.
626 */
627 memset(&global_dev, 0, sizeof(global_dev));
628 global_dev.pdev = pdev;
629 global_dev.chip_type = ent->driver_data;
630 global_dev.port_cfg = adap_configs;
631 if (machine_is_olpc())
632 global_dev.port_cfg = olpc_adap_configs;
633
634 spin_lock_init(&global_dev.reg_lock);
635 ret = via_pci_setup_mmio(&global_dev);
636 if (ret)
637 goto out_disable;
638 /*
639 * Set up interrupts and create our subdevices. Continue even if
640 * some things fail.
641 */
642 viafb_int_init();
643 via_setup_subdevs(&global_dev);
644 /*
645 * Set up the framebuffer device
646 */
647 ret = via_fb_pci_probe(&global_dev);
648 if (ret)
649 goto out_subdevs;
650 return 0;
651
652 out_subdevs:
653 via_teardown_subdevs();
654 via_pci_teardown_mmio(&global_dev);
655 out_disable:
656 pci_disable_device(pdev);
657 return ret;
658 }
659
via_pci_remove(struct pci_dev * pdev)660 static void via_pci_remove(struct pci_dev *pdev)
661 {
662 via_teardown_subdevs();
663 via_fb_pci_remove(pdev);
664 via_pci_teardown_mmio(&global_dev);
665 pci_disable_device(pdev);
666 }
667
668
669 static const struct pci_device_id via_pci_table[] = {
670 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
671 .driver_data = UNICHROME_CLE266 },
672 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
673 .driver_data = UNICHROME_K400 },
674 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
675 .driver_data = UNICHROME_K800 },
676 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
677 .driver_data = UNICHROME_PM800 },
678 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN700_DID),
679 .driver_data = UNICHROME_CN700 },
680 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
681 .driver_data = UNICHROME_CX700 },
682 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
683 .driver_data = UNICHROME_CN750 },
684 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
685 .driver_data = UNICHROME_K8M890 },
686 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
687 .driver_data = UNICHROME_P4M890 },
688 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
689 .driver_data = UNICHROME_P4M900 },
690 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
691 .driver_data = UNICHROME_VX800 },
692 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
693 .driver_data = UNICHROME_VX855 },
694 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX900_DID),
695 .driver_data = UNICHROME_VX900 },
696 { }
697 };
698 MODULE_DEVICE_TABLE(pci, via_pci_table);
699
700 static const struct dev_pm_ops via_pm_ops = {
701 #ifdef CONFIG_PM_SLEEP
702 .suspend = via_suspend,
703 .resume = via_resume,
704 .freeze = NULL,
705 .thaw = via_resume,
706 .poweroff = NULL,
707 .restore = via_resume,
708 #endif
709 };
710
711 static struct pci_driver via_driver = {
712 .name = "viafb",
713 .id_table = via_pci_table,
714 .probe = via_pci_probe,
715 .remove = via_pci_remove,
716 .driver.pm = &via_pm_ops,
717 };
718
via_core_init(void)719 static int __init via_core_init(void)
720 {
721 int ret;
722
723 ret = viafb_init();
724 if (ret)
725 return ret;
726 viafb_i2c_init();
727 viafb_gpio_init();
728 ret = pci_register_driver(&via_driver);
729 if (ret) {
730 viafb_gpio_exit();
731 viafb_i2c_exit();
732 return ret;
733 }
734
735 return 0;
736 }
737
via_core_exit(void)738 static void __exit via_core_exit(void)
739 {
740 pci_unregister_driver(&via_driver);
741 viafb_gpio_exit();
742 viafb_i2c_exit();
743 viafb_exit();
744 }
745
746 module_init(via_core_init);
747 module_exit(via_core_exit);
748