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 	return pci_register_driver(&via_driver);
729 }
730 
via_core_exit(void)731 static void __exit via_core_exit(void)
732 {
733 	pci_unregister_driver(&via_driver);
734 	viafb_gpio_exit();
735 	viafb_i2c_exit();
736 	viafb_exit();
737 }
738 
739 module_init(via_core_init);
740 module_exit(via_core_exit);
741