xref: /openbmc/linux/drivers/video/fbdev/via/via-core.c (revision d4313a68)
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 "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 	if (fb_modesetting_disabled("viafb"))
729 		return -ENODEV;
730 
731 	ret = viafb_init();
732 	if (ret)
733 		return ret;
734 	viafb_i2c_init();
735 	viafb_gpio_init();
736 	ret = pci_register_driver(&via_driver);
737 	if (ret) {
738 		viafb_gpio_exit();
739 		viafb_i2c_exit();
740 		return ret;
741 	}
742 
743 	return 0;
744 }
745 
via_core_exit(void)746 static void __exit via_core_exit(void)
747 {
748 	pci_unregister_driver(&via_driver);
749 	viafb_gpio_exit();
750 	viafb_i2c_exit();
751 	viafb_exit();
752 }
753 
754 module_init(via_core_init);
755 module_exit(via_core_exit);
756