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/aperture.h>
12 #include <linux/via-core.h>
13 #include <linux/via_i2c.h>
14 #include <linux/via-gpio.h>
15 #include "global.h"
16
17 #include <linux/module.h>
18 #include <linux/interrupt.h>
19 #include <linux/platform_device.h>
20 #include <linux/list.h>
21 #include <linux/pm.h>
22
23 /*
24 * The default port config.
25 */
26 static struct via_port_cfg adap_configs[] = {
27 [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
28 [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
29 [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
30 [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_I2C, VIASR, 0x2c },
31 [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
32 { 0, 0, 0, 0 }
33 };
34
35 /*
36 * The OLPC XO-1.5 puts the camera power and reset lines onto
37 * GPIO 2C.
38 */
39 static struct via_port_cfg olpc_adap_configs[] = {
40 [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 },
41 [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 },
42 [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 },
43 [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c },
44 [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d },
45 { 0, 0, 0, 0 }
46 };
47
48 /*
49 * We currently only support one viafb device (will there ever be
50 * more than one?), so just declare it globally here.
51 */
52 static struct viafb_dev global_dev;
53
54
55 /*
56 * Basic register access; spinlock required.
57 */
viafb_mmio_write(int reg,u32 v)58 static inline void viafb_mmio_write(int reg, u32 v)
59 {
60 iowrite32(v, global_dev.engine_mmio + reg);
61 }
62
viafb_mmio_read(int reg)63 static inline int viafb_mmio_read(int reg)
64 {
65 return ioread32(global_dev.engine_mmio + reg);
66 }
67
68 /* ---------------------------------------------------------------------- */
69 /*
70 * Interrupt management. We have a single IRQ line for a lot of
71 * different functions, so we need to share it. The design here
72 * is that we don't want to reimplement the shared IRQ code here;
73 * we also want to avoid having contention for a single handler thread.
74 * So each subdev driver which needs interrupts just requests
75 * them directly from the kernel. We just have what's needed for
76 * overall access to the interrupt control register.
77 */
78
79 /*
80 * Which interrupts are enabled now?
81 */
82 static u32 viafb_enabled_ints;
83
viafb_int_init(void)84 static void viafb_int_init(void)
85 {
86 viafb_enabled_ints = 0;
87
88 viafb_mmio_write(VDE_INTERRUPT, 0);
89 }
90
91 /*
92 * Allow subdevs to ask for specific interrupts to be enabled. These
93 * functions must be called with reg_lock held
94 */
viafb_irq_enable(u32 mask)95 void viafb_irq_enable(u32 mask)
96 {
97 viafb_enabled_ints |= mask;
98 viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
99 }
100 EXPORT_SYMBOL_GPL(viafb_irq_enable);
101
viafb_irq_disable(u32 mask)102 void viafb_irq_disable(u32 mask)
103 {
104 viafb_enabled_ints &= ~mask;
105 if (viafb_enabled_ints == 0)
106 viafb_mmio_write(VDE_INTERRUPT, 0); /* Disable entirely */
107 else
108 viafb_mmio_write(VDE_INTERRUPT,
109 viafb_enabled_ints | VDE_I_ENABLE);
110 }
111 EXPORT_SYMBOL_GPL(viafb_irq_disable);
112
113 /* ---------------------------------------------------------------------- */
114 /*
115 * Currently, the camera driver is the only user of the DMA code, so we
116 * only compile it in if the camera driver is being built. Chances are,
117 * most viafb systems will not need to have this extra code for a while.
118 * As soon as another user comes long, the ifdef can be removed.
119 */
120 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
121 /*
122 * Access to the DMA engine. This currently provides what the camera
123 * driver needs (i.e. outgoing only) but is easily expandable if need
124 * be.
125 */
126
127 /*
128 * There are four DMA channels in the vx855. For now, we only
129 * use one of them, though. Most of the time, the DMA channel
130 * will be idle, so we keep the IRQ handler unregistered except
131 * when some subsystem has indicated an interest.
132 */
133 static int viafb_dma_users;
134 static DECLARE_COMPLETION(viafb_dma_completion);
135 /*
136 * This mutex protects viafb_dma_users and our global interrupt
137 * registration state; it also serializes access to the DMA
138 * engine.
139 */
140 static DEFINE_MUTEX(viafb_dma_lock);
141
142 /*
143 * The VX855 DMA descriptor (used for s/g transfers) looks
144 * like this.
145 */
146 struct viafb_vx855_dma_descr {
147 u32 addr_low; /* Low part of phys addr */
148 u32 addr_high; /* High 12 bits of addr */
149 u32 fb_offset; /* Offset into FB memory */
150 u32 seg_size; /* Size, 16-byte units */
151 u32 tile_mode; /* "tile mode" setting */
152 u32 next_desc_low; /* Next descriptor addr */
153 u32 next_desc_high;
154 u32 pad; /* Fill out to 64 bytes */
155 };
156
157 /*
158 * Flags added to the "next descriptor low" pointers
159 */
160 #define VIAFB_DMA_MAGIC 0x01 /* ??? Just has to be there */
161 #define VIAFB_DMA_FINAL_SEGMENT 0x02 /* Final segment */
162
163 /*
164 * The completion IRQ handler.
165 */
viafb_dma_irq(int irq,void * data)166 static irqreturn_t viafb_dma_irq(int irq, void *data)
167 {
168 int csr;
169 irqreturn_t ret = IRQ_NONE;
170
171 spin_lock(&global_dev.reg_lock);
172 csr = viafb_mmio_read(VDMA_CSR0);
173 if (csr & VDMA_C_DONE) {
174 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
175 complete(&viafb_dma_completion);
176 ret = IRQ_HANDLED;
177 }
178 spin_unlock(&global_dev.reg_lock);
179 return ret;
180 }
181
182 /*
183 * Indicate a need for DMA functionality.
184 */
viafb_request_dma(void)185 int viafb_request_dma(void)
186 {
187 int ret = 0;
188
189 /*
190 * Only VX855 is supported currently.
191 */
192 if (global_dev.chip_type != UNICHROME_VX855)
193 return -ENODEV;
194 /*
195 * Note the new user and set up our interrupt handler
196 * if need be.
197 */
198 mutex_lock(&viafb_dma_lock);
199 viafb_dma_users++;
200 if (viafb_dma_users == 1) {
201 ret = request_irq(global_dev.pdev->irq, viafb_dma_irq,
202 IRQF_SHARED, "via-dma", &viafb_dma_users);
203 if (ret)
204 viafb_dma_users--;
205 else
206 viafb_irq_enable(VDE_I_DMA0TDEN);
207 }
208 mutex_unlock(&viafb_dma_lock);
209 return ret;
210 }
211 EXPORT_SYMBOL_GPL(viafb_request_dma);
212
viafb_release_dma(void)213 void viafb_release_dma(void)
214 {
215 mutex_lock(&viafb_dma_lock);
216 viafb_dma_users--;
217 if (viafb_dma_users == 0) {
218 viafb_irq_disable(VDE_I_DMA0TDEN);
219 free_irq(global_dev.pdev->irq, &viafb_dma_users);
220 }
221 mutex_unlock(&viafb_dma_lock);
222 }
223 EXPORT_SYMBOL_GPL(viafb_release_dma);
224
225 /*
226 * Do a scatter/gather DMA copy from FB memory. You must have done
227 * a successful call to viafb_request_dma() first.
228 */
viafb_dma_copy_out_sg(unsigned int offset,struct scatterlist * sg,int nsg)229 int viafb_dma_copy_out_sg(unsigned int offset, struct scatterlist *sg, int nsg)
230 {
231 struct viafb_vx855_dma_descr *descr;
232 void *descrpages;
233 dma_addr_t descr_handle;
234 unsigned long flags;
235 int i;
236 struct scatterlist *sgentry;
237 dma_addr_t nextdesc;
238
239 /*
240 * Get a place to put the descriptors.
241 */
242 descrpages = dma_alloc_coherent(&global_dev.pdev->dev,
243 nsg*sizeof(struct viafb_vx855_dma_descr),
244 &descr_handle, GFP_KERNEL);
245 if (descrpages == NULL) {
246 dev_err(&global_dev.pdev->dev, "Unable to get descr page.\n");
247 return -ENOMEM;
248 }
249 mutex_lock(&viafb_dma_lock);
250 /*
251 * Fill them in.
252 */
253 descr = descrpages;
254 nextdesc = descr_handle + sizeof(struct viafb_vx855_dma_descr);
255 for_each_sg(sg, sgentry, nsg, i) {
256 dma_addr_t paddr = sg_dma_address(sgentry);
257 descr->addr_low = paddr & 0xfffffff0;
258 descr->addr_high = ((u64) paddr >> 32) & 0x0fff;
259 descr->fb_offset = offset;
260 descr->seg_size = sg_dma_len(sgentry) >> 4;
261 descr->tile_mode = 0;
262 descr->next_desc_low = (nextdesc&0xfffffff0) | VIAFB_DMA_MAGIC;
263 descr->next_desc_high = ((u64) nextdesc >> 32) & 0x0fff;
264 descr->pad = 0xffffffff; /* VIA driver does this */
265 offset += sg_dma_len(sgentry);
266 nextdesc += sizeof(struct viafb_vx855_dma_descr);
267 descr++;
268 }
269 descr[-1].next_desc_low = VIAFB_DMA_FINAL_SEGMENT|VIAFB_DMA_MAGIC;
270 /*
271 * Program the engine.
272 */
273 spin_lock_irqsave(&global_dev.reg_lock, flags);
274 init_completion(&viafb_dma_completion);
275 viafb_mmio_write(VDMA_DQWCR0, 0);
276 viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_DONE);
277 viafb_mmio_write(VDMA_MR0, VDMA_MR_TDIE | VDMA_MR_CHAIN);
278 viafb_mmio_write(VDMA_DPRL0, descr_handle | VIAFB_DMA_MAGIC);
279 viafb_mmio_write(VDMA_DPRH0,
280 (((u64)descr_handle >> 32) & 0x0fff) | 0xf0000);
281 (void) viafb_mmio_read(VDMA_CSR0);
282 viafb_mmio_write(VDMA_CSR0, VDMA_C_ENABLE|VDMA_C_START);
283 spin_unlock_irqrestore(&global_dev.reg_lock, flags);
284 /*
285 * Now we just wait until the interrupt handler says
286 * we're done. Except that, actually, we need to wait a little
287 * longer: the interrupts seem to jump the gun a little and we
288 * get corrupted frames sometimes.
289 */
290 wait_for_completion_timeout(&viafb_dma_completion, 1);
291 msleep(1);
292 if ((viafb_mmio_read(VDMA_CSR0)&VDMA_C_DONE) == 0)
293 printk(KERN_ERR "VIA DMA timeout!\n");
294 /*
295 * Clean up and we're done.
296 */
297 viafb_mmio_write(VDMA_CSR0, VDMA_C_DONE);
298 viafb_mmio_write(VDMA_MR0, 0); /* Reset int enable */
299 mutex_unlock(&viafb_dma_lock);
300 dma_free_coherent(&global_dev.pdev->dev,
301 nsg*sizeof(struct viafb_vx855_dma_descr), descrpages,
302 descr_handle);
303 return 0;
304 }
305 EXPORT_SYMBOL_GPL(viafb_dma_copy_out_sg);
306 #endif /* CONFIG_VIDEO_VIA_CAMERA */
307
308 /* ---------------------------------------------------------------------- */
309 /*
310 * Figure out how big our framebuffer memory is. Kind of ugly,
311 * but evidently we can't trust the information found in the
312 * fbdev configuration area.
313 */
314 static u16 via_function3[] = {
315 CLE266_FUNCTION3, KM400_FUNCTION3, CN400_FUNCTION3, CN700_FUNCTION3,
316 CX700_FUNCTION3, KM800_FUNCTION3, KM890_FUNCTION3, P4M890_FUNCTION3,
317 P4M900_FUNCTION3, VX800_FUNCTION3, VX855_FUNCTION3, VX900_FUNCTION3,
318 };
319
320 /* Get the BIOS-configured framebuffer size from PCI configuration space
321 * of function 3 in the respective chipset */
viafb_get_fb_size_from_pci(int chip_type)322 static int viafb_get_fb_size_from_pci(int chip_type)
323 {
324 int i;
325 u8 offset = 0;
326 u32 FBSize;
327 u32 VideoMemSize;
328
329 /* search for the "FUNCTION3" device in this chipset */
330 for (i = 0; i < ARRAY_SIZE(via_function3); i++) {
331 struct pci_dev *pdev;
332
333 pdev = pci_get_device(PCI_VENDOR_ID_VIA, via_function3[i],
334 NULL);
335 if (!pdev)
336 continue;
337
338 DEBUG_MSG(KERN_INFO "Device ID = %x\n", pdev->device);
339
340 switch (pdev->device) {
341 case CLE266_FUNCTION3:
342 case KM400_FUNCTION3:
343 offset = 0xE0;
344 break;
345 case CN400_FUNCTION3:
346 case CN700_FUNCTION3:
347 case CX700_FUNCTION3:
348 case KM800_FUNCTION3:
349 case KM890_FUNCTION3:
350 case P4M890_FUNCTION3:
351 case P4M900_FUNCTION3:
352 case VX800_FUNCTION3:
353 case VX855_FUNCTION3:
354 case VX900_FUNCTION3:
355 /*case CN750_FUNCTION3: */
356 offset = 0xA0;
357 break;
358 }
359
360 if (!offset)
361 break;
362
363 pci_read_config_dword(pdev, offset, &FBSize);
364 pci_dev_put(pdev);
365 }
366
367 if (!offset) {
368 printk(KERN_ERR "cannot determine framebuffer size\n");
369 return -EIO;
370 }
371
372 FBSize = FBSize & 0x00007000;
373 DEBUG_MSG(KERN_INFO "FB Size = %x\n", FBSize);
374
375 if (chip_type < UNICHROME_CX700) {
376 switch (FBSize) {
377 case 0x00004000:
378 VideoMemSize = (16 << 20); /*16M */
379 break;
380
381 case 0x00005000:
382 VideoMemSize = (32 << 20); /*32M */
383 break;
384
385 case 0x00006000:
386 VideoMemSize = (64 << 20); /*64M */
387 break;
388
389 default:
390 VideoMemSize = (32 << 20); /*32M */
391 break;
392 }
393 } else {
394 switch (FBSize) {
395 case 0x00001000:
396 VideoMemSize = (8 << 20); /*8M */
397 break;
398
399 case 0x00002000:
400 VideoMemSize = (16 << 20); /*16M */
401 break;
402
403 case 0x00003000:
404 VideoMemSize = (32 << 20); /*32M */
405 break;
406
407 case 0x00004000:
408 VideoMemSize = (64 << 20); /*64M */
409 break;
410
411 case 0x00005000:
412 VideoMemSize = (128 << 20); /*128M */
413 break;
414
415 case 0x00006000:
416 VideoMemSize = (256 << 20); /*256M */
417 break;
418
419 case 0x00007000: /* Only on VX855/875 */
420 VideoMemSize = (512 << 20); /*512M */
421 break;
422
423 default:
424 VideoMemSize = (32 << 20); /*32M */
425 break;
426 }
427 }
428
429 return VideoMemSize;
430 }
431
432
433 /*
434 * Figure out and map our MMIO regions.
435 */
via_pci_setup_mmio(struct viafb_dev * vdev)436 static int via_pci_setup_mmio(struct viafb_dev *vdev)
437 {
438 int ret;
439 /*
440 * Hook up to the device registers. Note that we soldier
441 * on if it fails; the framebuffer can operate (without
442 * acceleration) without this region.
443 */
444 vdev->engine_start = pci_resource_start(vdev->pdev, 1);
445 vdev->engine_len = pci_resource_len(vdev->pdev, 1);
446 vdev->engine_mmio = ioremap(vdev->engine_start,
447 vdev->engine_len);
448 if (vdev->engine_mmio == NULL)
449 dev_err(&vdev->pdev->dev,
450 "Unable to map engine MMIO; operation will be "
451 "slow and crippled.\n");
452 /*
453 * Map in framebuffer memory. For now, failure here is
454 * fatal. Unfortunately, in the absence of significant
455 * vmalloc space, failure here is also entirely plausible.
456 * Eventually we want to move away from mapping this
457 * entire region.
458 */
459 if (vdev->chip_type == UNICHROME_VX900)
460 vdev->fbmem_start = pci_resource_start(vdev->pdev, 2);
461 else
462 vdev->fbmem_start = pci_resource_start(vdev->pdev, 0);
463 ret = vdev->fbmem_len = viafb_get_fb_size_from_pci(vdev->chip_type);
464 if (ret < 0)
465 goto out_unmap;
466
467 /* try to map less memory on failure, 8 MB should be still enough */
468 for (; vdev->fbmem_len >= 8 << 20; vdev->fbmem_len /= 2) {
469 vdev->fbmem = ioremap_wc(vdev->fbmem_start, vdev->fbmem_len);
470 if (vdev->fbmem)
471 break;
472 }
473
474 if (vdev->fbmem == NULL) {
475 ret = -ENOMEM;
476 goto out_unmap;
477 }
478 return 0;
479 out_unmap:
480 iounmap(vdev->engine_mmio);
481 return ret;
482 }
483
via_pci_teardown_mmio(struct viafb_dev * vdev)484 static void via_pci_teardown_mmio(struct viafb_dev *vdev)
485 {
486 iounmap(vdev->fbmem);
487 iounmap(vdev->engine_mmio);
488 }
489
490 /*
491 * Create our subsidiary devices.
492 */
493 static struct viafb_subdev_info {
494 char *name;
495 struct platform_device *platdev;
496 } viafb_subdevs[] = {
497 {
498 .name = "viafb-gpio",
499 },
500 {
501 .name = "viafb-i2c",
502 },
503 #if IS_ENABLED(CONFIG_VIDEO_VIA_CAMERA)
504 {
505 .name = "viafb-camera",
506 },
507 #endif
508 };
509 #define N_SUBDEVS ARRAY_SIZE(viafb_subdevs)
510
via_create_subdev(struct viafb_dev * vdev,struct viafb_subdev_info * info)511 static int via_create_subdev(struct viafb_dev *vdev,
512 struct viafb_subdev_info *info)
513 {
514 int ret;
515
516 info->platdev = platform_device_alloc(info->name, -1);
517 if (!info->platdev) {
518 dev_err(&vdev->pdev->dev, "Unable to allocate pdev %s\n",
519 info->name);
520 return -ENOMEM;
521 }
522 info->platdev->dev.parent = &vdev->pdev->dev;
523 info->platdev->dev.platform_data = vdev;
524 ret = platform_device_add(info->platdev);
525 if (ret) {
526 dev_err(&vdev->pdev->dev, "Unable to add pdev %s\n",
527 info->name);
528 platform_device_put(info->platdev);
529 info->platdev = NULL;
530 }
531 return ret;
532 }
533
via_setup_subdevs(struct viafb_dev * vdev)534 static int via_setup_subdevs(struct viafb_dev *vdev)
535 {
536 int i;
537
538 /*
539 * Ignore return values. Even if some of the devices
540 * fail to be created, we'll still be able to use some
541 * of the rest.
542 */
543 for (i = 0; i < N_SUBDEVS; i++)
544 via_create_subdev(vdev, viafb_subdevs + i);
545 return 0;
546 }
547
via_teardown_subdevs(void)548 static void via_teardown_subdevs(void)
549 {
550 int i;
551
552 for (i = 0; i < N_SUBDEVS; i++)
553 if (viafb_subdevs[i].platdev) {
554 viafb_subdevs[i].platdev->dev.platform_data = NULL;
555 platform_device_unregister(viafb_subdevs[i].platdev);
556 }
557 }
558
559 /*
560 * Power management functions
561 */
562 static __maybe_unused LIST_HEAD(viafb_pm_hooks);
563 static __maybe_unused DEFINE_MUTEX(viafb_pm_hooks_lock);
564
viafb_pm_register(struct viafb_pm_hooks * hooks)565 void viafb_pm_register(struct viafb_pm_hooks *hooks)
566 {
567 INIT_LIST_HEAD(&hooks->list);
568
569 mutex_lock(&viafb_pm_hooks_lock);
570 list_add_tail(&hooks->list, &viafb_pm_hooks);
571 mutex_unlock(&viafb_pm_hooks_lock);
572 }
573 EXPORT_SYMBOL_GPL(viafb_pm_register);
574
viafb_pm_unregister(struct viafb_pm_hooks * hooks)575 void viafb_pm_unregister(struct viafb_pm_hooks *hooks)
576 {
577 mutex_lock(&viafb_pm_hooks_lock);
578 list_del(&hooks->list);
579 mutex_unlock(&viafb_pm_hooks_lock);
580 }
581 EXPORT_SYMBOL_GPL(viafb_pm_unregister);
582
via_suspend(struct device * dev)583 static int __maybe_unused via_suspend(struct device *dev)
584 {
585 struct viafb_pm_hooks *hooks;
586
587 /*
588 * "I've occasionally hit a few drivers that caused suspend
589 * failures, and each and every time it was a driver bug, and
590 * the right thing to do was to just ignore the error and suspend
591 * anyway - returning an error code and trying to undo the suspend
592 * is not what anybody ever really wants, even if our model
593 *_allows_ for it."
594 * -- Linus Torvalds, Dec. 7, 2009
595 */
596 mutex_lock(&viafb_pm_hooks_lock);
597 list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list)
598 hooks->suspend(hooks->private);
599 mutex_unlock(&viafb_pm_hooks_lock);
600
601 return 0;
602 }
603
via_resume(struct device * dev)604 static int __maybe_unused via_resume(struct device *dev)
605 {
606 struct viafb_pm_hooks *hooks;
607
608 /* Now bring back any subdevs */
609 mutex_lock(&viafb_pm_hooks_lock);
610 list_for_each_entry(hooks, &viafb_pm_hooks, list)
611 hooks->resume(hooks->private);
612 mutex_unlock(&viafb_pm_hooks_lock);
613
614 return 0;
615 }
616
via_pci_probe(struct pci_dev * pdev,const struct pci_device_id * ent)617 static int via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
618 {
619 int ret;
620
621 ret = aperture_remove_conflicting_pci_devices(pdev, "viafb");
622 if (ret)
623 return ret;
624
625 ret = pci_enable_device(pdev);
626 if (ret)
627 return ret;
628
629 /*
630 * Global device initialization.
631 */
632 memset(&global_dev, 0, sizeof(global_dev));
633 global_dev.pdev = pdev;
634 global_dev.chip_type = ent->driver_data;
635 global_dev.port_cfg = adap_configs;
636 if (machine_is_olpc())
637 global_dev.port_cfg = olpc_adap_configs;
638
639 spin_lock_init(&global_dev.reg_lock);
640 ret = via_pci_setup_mmio(&global_dev);
641 if (ret)
642 goto out_disable;
643 /*
644 * Set up interrupts and create our subdevices. Continue even if
645 * some things fail.
646 */
647 viafb_int_init();
648 via_setup_subdevs(&global_dev);
649 /*
650 * Set up the framebuffer device
651 */
652 ret = via_fb_pci_probe(&global_dev);
653 if (ret)
654 goto out_subdevs;
655 return 0;
656
657 out_subdevs:
658 via_teardown_subdevs();
659 via_pci_teardown_mmio(&global_dev);
660 out_disable:
661 pci_disable_device(pdev);
662 return ret;
663 }
664
via_pci_remove(struct pci_dev * pdev)665 static void via_pci_remove(struct pci_dev *pdev)
666 {
667 via_teardown_subdevs();
668 via_fb_pci_remove(pdev);
669 via_pci_teardown_mmio(&global_dev);
670 pci_disable_device(pdev);
671 }
672
673
674 static const struct pci_device_id via_pci_table[] = {
675 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CLE266_DID),
676 .driver_data = UNICHROME_CLE266 },
677 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K400_DID),
678 .driver_data = UNICHROME_K400 },
679 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K800_DID),
680 .driver_data = UNICHROME_K800 },
681 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_PM800_DID),
682 .driver_data = UNICHROME_PM800 },
683 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN700_DID),
684 .driver_data = UNICHROME_CN700 },
685 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CX700_DID),
686 .driver_data = UNICHROME_CX700 },
687 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_CN750_DID),
688 .driver_data = UNICHROME_CN750 },
689 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_K8M890_DID),
690 .driver_data = UNICHROME_K8M890 },
691 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M890_DID),
692 .driver_data = UNICHROME_P4M890 },
693 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_P4M900_DID),
694 .driver_data = UNICHROME_P4M900 },
695 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX800_DID),
696 .driver_data = UNICHROME_VX800 },
697 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX855_DID),
698 .driver_data = UNICHROME_VX855 },
699 { PCI_DEVICE(PCI_VENDOR_ID_VIA, UNICHROME_VX900_DID),
700 .driver_data = UNICHROME_VX900 },
701 { }
702 };
703 MODULE_DEVICE_TABLE(pci, via_pci_table);
704
705 static const struct dev_pm_ops via_pm_ops = {
706 #ifdef CONFIG_PM_SLEEP
707 .suspend = via_suspend,
708 .resume = via_resume,
709 .freeze = NULL,
710 .thaw = via_resume,
711 .poweroff = NULL,
712 .restore = via_resume,
713 #endif
714 };
715
716 static struct pci_driver via_driver = {
717 .name = "viafb",
718 .id_table = via_pci_table,
719 .probe = via_pci_probe,
720 .remove = via_pci_remove,
721 .driver.pm = &via_pm_ops,
722 };
723
via_core_init(void)724 static int __init via_core_init(void)
725 {
726 int ret;
727
728 ret = viafb_init();
729 if (ret)
730 return ret;
731 viafb_i2c_init();
732 viafb_gpio_init();
733 ret = pci_register_driver(&via_driver);
734 if (ret) {
735 viafb_gpio_exit();
736 viafb_i2c_exit();
737 return ret;
738 }
739
740 return 0;
741 }
742
via_core_exit(void)743 static void __exit via_core_exit(void)
744 {
745 pci_unregister_driver(&via_driver);
746 viafb_gpio_exit();
747 viafb_i2c_exit();
748 viafb_exit();
749 }
750
751 module_init(via_core_init);
752 module_exit(via_core_exit);
753