xref: /openbmc/linux/drivers/gpu/drm/gma500/psb_drv.c (revision 9134211f)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /**************************************************************************
3  * Copyright (c) 2007-2011, Intel Corporation.
4  * All Rights Reserved.
5  * Copyright (c) 2008, Tungsten Graphics, Inc. Cedar Park, TX., USA.
6  * All Rights Reserved.
7  *
8  **************************************************************************/
9 
10 #include <linux/aperture.h>
11 #include <linux/cpu.h>
12 #include <linux/module.h>
13 #include <linux/notifier.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/spinlock.h>
16 #include <linux/delay.h>
17 
18 #include <asm/set_memory.h>
19 
20 #include <acpi/video.h>
21 
22 #include <drm/drm.h>
23 #include <drm/drm_drv.h>
24 #include <drm/drm_file.h>
25 #include <drm/drm_ioctl.h>
26 #include <drm/drm_pciids.h>
27 #include <drm/drm_vblank.h>
28 
29 #include "framebuffer.h"
30 #include "gem.h"
31 #include "intel_bios.h"
32 #include "mid_bios.h"
33 #include "power.h"
34 #include "psb_drv.h"
35 #include "psb_intel_reg.h"
36 #include "psb_irq.h"
37 #include "psb_reg.h"
38 
39 static const struct drm_driver driver;
40 static int psb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
41 
42 /*
43  * The table below contains a mapping of the PCI vendor ID and the PCI Device ID
44  * to the different groups of PowerVR 5-series chip designs
45  *
46  * 0x8086 = Intel Corporation
47  *
48  * PowerVR SGX535    - Poulsbo    - Intel GMA 500, Intel Atom Z5xx
49  * PowerVR SGX535    - Moorestown - Intel GMA 600
50  * PowerVR SGX535    - Oaktrail   - Intel GMA 600, Intel Atom Z6xx, E6xx
51  * PowerVR SGX545    - Cedartrail - Intel GMA 3600, Intel Atom D2500, N2600
52  * PowerVR SGX545    - Cedartrail - Intel GMA 3650, Intel Atom D2550, D2700,
53  *                                  N2800
54  */
55 static const struct pci_device_id pciidlist[] = {
56 	/* Poulsbo */
57 	{ 0x8086, 0x8108, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &psb_chip_ops },
58 	{ 0x8086, 0x8109, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &psb_chip_ops },
59 	/* Oak Trail */
60 	{ 0x8086, 0x4100, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
61 	{ 0x8086, 0x4101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
62 	{ 0x8086, 0x4102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
63 	{ 0x8086, 0x4103, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
64 	{ 0x8086, 0x4104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
65 	{ 0x8086, 0x4105, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
66 	{ 0x8086, 0x4106, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
67 	{ 0x8086, 0x4107, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
68 	{ 0x8086, 0x4108, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &oaktrail_chip_ops },
69 	/* Cedar Trail */
70 	{ 0x8086, 0x0be0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
71 	{ 0x8086, 0x0be1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
72 	{ 0x8086, 0x0be2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
73 	{ 0x8086, 0x0be3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
74 	{ 0x8086, 0x0be4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
75 	{ 0x8086, 0x0be5, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
76 	{ 0x8086, 0x0be6, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
77 	{ 0x8086, 0x0be7, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
78 	{ 0x8086, 0x0be8, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
79 	{ 0x8086, 0x0be9, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
80 	{ 0x8086, 0x0bea, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
81 	{ 0x8086, 0x0beb, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
82 	{ 0x8086, 0x0bec, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
83 	{ 0x8086, 0x0bed, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
84 	{ 0x8086, 0x0bee, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
85 	{ 0x8086, 0x0bef, PCI_ANY_ID, PCI_ANY_ID, 0, 0, (long) &cdv_chip_ops },
86 	{ 0, }
87 };
88 MODULE_DEVICE_TABLE(pci, pciidlist);
89 
90 /*
91  * Standard IOCTLs.
92  */
93 static const struct drm_ioctl_desc psb_ioctls[] = {
94 };
95 
96 /**
97  *	psb_spank		-	reset the 2D engine
98  *	@dev_priv: our PSB DRM device
99  *
100  *	Soft reset the graphics engine and then reload the necessary registers.
101  */
102 static void psb_spank(struct drm_psb_private *dev_priv)
103 {
104 	PSB_WSGX32(_PSB_CS_RESET_BIF_RESET | _PSB_CS_RESET_DPM_RESET |
105 		_PSB_CS_RESET_TA_RESET | _PSB_CS_RESET_USE_RESET |
106 		_PSB_CS_RESET_ISP_RESET | _PSB_CS_RESET_TSP_RESET |
107 		_PSB_CS_RESET_TWOD_RESET, PSB_CR_SOFT_RESET);
108 	PSB_RSGX32(PSB_CR_SOFT_RESET);
109 
110 	msleep(1);
111 
112 	PSB_WSGX32(0, PSB_CR_SOFT_RESET);
113 	wmb();
114 	PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) | _PSB_CB_CTRL_CLEAR_FAULT,
115 		   PSB_CR_BIF_CTRL);
116 	wmb();
117 	(void) PSB_RSGX32(PSB_CR_BIF_CTRL);
118 
119 	msleep(1);
120 	PSB_WSGX32(PSB_RSGX32(PSB_CR_BIF_CTRL) & ~_PSB_CB_CTRL_CLEAR_FAULT,
121 		   PSB_CR_BIF_CTRL);
122 	(void) PSB_RSGX32(PSB_CR_BIF_CTRL);
123 	PSB_WSGX32(dev_priv->gtt.gatt_start, PSB_CR_BIF_TWOD_REQ_BASE);
124 }
125 
126 static int psb_do_init(struct drm_device *dev)
127 {
128 	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
129 	struct psb_gtt *pg = &dev_priv->gtt;
130 
131 	uint32_t stolen_gtt;
132 
133 	if (pg->mmu_gatt_start & 0x0FFFFFFF) {
134 		dev_err(dev->dev, "Gatt must be 256M aligned. This is a bug.\n");
135 		return -EINVAL;
136 	}
137 
138 	stolen_gtt = (pg->stolen_size >> PAGE_SHIFT) * 4;
139 	stolen_gtt = (stolen_gtt + PAGE_SIZE - 1) >> PAGE_SHIFT;
140 	stolen_gtt = (stolen_gtt < pg->gtt_pages) ? stolen_gtt : pg->gtt_pages;
141 
142 	dev_priv->gatt_free_offset = pg->mmu_gatt_start +
143 	    (stolen_gtt << PAGE_SHIFT) * 1024;
144 
145 	spin_lock_init(&dev_priv->irqmask_lock);
146 
147 	PSB_WSGX32(0x00000000, PSB_CR_BIF_BANK0);
148 	PSB_WSGX32(0x00000000, PSB_CR_BIF_BANK1);
149 	PSB_RSGX32(PSB_CR_BIF_BANK1);
150 
151 	/* Do not bypass any MMU access, let them pagefault instead */
152 	PSB_WSGX32((PSB_RSGX32(PSB_CR_BIF_CTRL) & ~_PSB_MMU_ER_MASK),
153 		   PSB_CR_BIF_CTRL);
154 	PSB_RSGX32(PSB_CR_BIF_CTRL);
155 
156 	psb_spank(dev_priv);
157 
158 	/* mmu_gatt ?? */
159 	PSB_WSGX32(pg->gatt_start, PSB_CR_BIF_TWOD_REQ_BASE);
160 	PSB_RSGX32(PSB_CR_BIF_TWOD_REQ_BASE); /* Post */
161 
162 	return 0;
163 }
164 
165 static void psb_driver_unload(struct drm_device *dev)
166 {
167 	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
168 
169 	/* TODO: Kill vblank etc here */
170 
171 	gma_backlight_exit(dev);
172 	psb_modeset_cleanup(dev);
173 
174 	gma_irq_uninstall(dev);
175 
176 	if (dev_priv->ops->chip_teardown)
177 		dev_priv->ops->chip_teardown(dev);
178 
179 	psb_intel_opregion_fini(dev);
180 
181 	if (dev_priv->pf_pd) {
182 		psb_mmu_free_pagedir(dev_priv->pf_pd);
183 		dev_priv->pf_pd = NULL;
184 	}
185 	if (dev_priv->mmu) {
186 		struct psb_gtt *pg = &dev_priv->gtt;
187 
188 		psb_mmu_remove_pfn_sequence(
189 			psb_mmu_get_default_pd
190 			(dev_priv->mmu),
191 			pg->mmu_gatt_start,
192 			dev_priv->vram_stolen_size >> PAGE_SHIFT);
193 		psb_mmu_driver_takedown(dev_priv->mmu);
194 		dev_priv->mmu = NULL;
195 	}
196 	psb_gem_mm_fini(dev);
197 	psb_gtt_fini(dev);
198 	if (dev_priv->scratch_page) {
199 		set_pages_wb(dev_priv->scratch_page, 1);
200 		__free_page(dev_priv->scratch_page);
201 		dev_priv->scratch_page = NULL;
202 	}
203 	if (dev_priv->vdc_reg) {
204 		iounmap(dev_priv->vdc_reg);
205 		dev_priv->vdc_reg = NULL;
206 	}
207 	if (dev_priv->sgx_reg) {
208 		iounmap(dev_priv->sgx_reg);
209 		dev_priv->sgx_reg = NULL;
210 	}
211 	if (dev_priv->aux_reg) {
212 		iounmap(dev_priv->aux_reg);
213 		dev_priv->aux_reg = NULL;
214 	}
215 	pci_dev_put(dev_priv->aux_pdev);
216 	pci_dev_put(dev_priv->lpc_pdev);
217 
218 	/* Destroy VBT data */
219 	psb_intel_destroy_bios(dev);
220 
221 	gma_power_uninit(dev);
222 }
223 
224 static void psb_device_release(void *data)
225 {
226 	struct drm_device *dev = data;
227 
228 	psb_driver_unload(dev);
229 }
230 
231 static int psb_driver_load(struct drm_device *dev, unsigned long flags)
232 {
233 	struct pci_dev *pdev = to_pci_dev(dev->dev);
234 	struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
235 	unsigned long resource_start, resource_len;
236 	unsigned long irqflags;
237 	struct drm_connector_list_iter conn_iter;
238 	struct drm_connector *connector;
239 	struct gma_encoder *gma_encoder;
240 	struct psb_gtt *pg;
241 	int ret = -ENOMEM;
242 
243 	/* initializing driver private data */
244 
245 	dev_priv->ops = (struct psb_ops *)flags;
246 
247 	pg = &dev_priv->gtt;
248 
249 	pci_set_master(pdev);
250 
251 	dev_priv->num_pipe = dev_priv->ops->pipes;
252 
253 	resource_start = pci_resource_start(pdev, PSB_MMIO_RESOURCE);
254 
255 	dev_priv->vdc_reg =
256 	    ioremap(resource_start + PSB_VDC_OFFSET, PSB_VDC_SIZE);
257 	if (!dev_priv->vdc_reg)
258 		goto out_err;
259 
260 	dev_priv->sgx_reg = ioremap(resource_start + dev_priv->ops->sgx_offset,
261 							PSB_SGX_SIZE);
262 	if (!dev_priv->sgx_reg)
263 		goto out_err;
264 
265 	if (IS_MRST(dev)) {
266 		int domain = pci_domain_nr(pdev->bus);
267 
268 		dev_priv->aux_pdev =
269 			pci_get_domain_bus_and_slot(domain, 0,
270 						    PCI_DEVFN(3, 0));
271 
272 		if (dev_priv->aux_pdev) {
273 			resource_start = pci_resource_start(dev_priv->aux_pdev,
274 							    PSB_AUX_RESOURCE);
275 			resource_len = pci_resource_len(dev_priv->aux_pdev,
276 							PSB_AUX_RESOURCE);
277 			dev_priv->aux_reg = ioremap(resource_start,
278 							    resource_len);
279 			if (!dev_priv->aux_reg)
280 				goto out_err;
281 
282 			DRM_DEBUG_KMS("Found aux vdc");
283 		} else {
284 			/* Couldn't find the aux vdc so map to primary vdc */
285 			dev_priv->aux_reg = dev_priv->vdc_reg;
286 			DRM_DEBUG_KMS("Couldn't find aux pci device");
287 		}
288 		dev_priv->gmbus_reg = dev_priv->aux_reg;
289 
290 		dev_priv->lpc_pdev =
291 			pci_get_domain_bus_and_slot(domain, 0,
292 						    PCI_DEVFN(31, 0));
293 		if (dev_priv->lpc_pdev) {
294 			pci_read_config_word(dev_priv->lpc_pdev, PSB_LPC_GBA,
295 				&dev_priv->lpc_gpio_base);
296 			pci_write_config_dword(dev_priv->lpc_pdev, PSB_LPC_GBA,
297 				(u32)dev_priv->lpc_gpio_base | (1L<<31));
298 			pci_read_config_word(dev_priv->lpc_pdev, PSB_LPC_GBA,
299 				&dev_priv->lpc_gpio_base);
300 			dev_priv->lpc_gpio_base &= 0xffc0;
301 			if (dev_priv->lpc_gpio_base)
302 				DRM_DEBUG_KMS("Found LPC GPIO at 0x%04x\n",
303 						dev_priv->lpc_gpio_base);
304 			else {
305 				pci_dev_put(dev_priv->lpc_pdev);
306 				dev_priv->lpc_pdev = NULL;
307 			}
308 		}
309 	} else {
310 		dev_priv->gmbus_reg = dev_priv->vdc_reg;
311 	}
312 
313 	psb_intel_opregion_setup(dev);
314 
315 	ret = dev_priv->ops->chip_setup(dev);
316 	if (ret)
317 		goto out_err;
318 
319 	/* Init OSPM support */
320 	gma_power_init(dev);
321 
322 	ret = -ENOMEM;
323 
324 	dev_priv->scratch_page = alloc_page(GFP_DMA32 | __GFP_ZERO);
325 	if (!dev_priv->scratch_page)
326 		goto out_err;
327 
328 	set_pages_uc(dev_priv->scratch_page, 1);
329 
330 	ret = psb_gtt_init(dev);
331 	if (ret)
332 		goto out_err;
333 	ret = psb_gem_mm_init(dev);
334 	if (ret)
335 		goto out_err;
336 
337 	ret = -ENOMEM;
338 
339 	dev_priv->mmu = psb_mmu_driver_init(dev, 1, 0, NULL);
340 	if (!dev_priv->mmu)
341 		goto out_err;
342 
343 	dev_priv->pf_pd = psb_mmu_alloc_pd(dev_priv->mmu, 1, 0);
344 	if (!dev_priv->pf_pd)
345 		goto out_err;
346 
347 	ret = psb_do_init(dev);
348 	if (ret)
349 		return ret;
350 
351 	/* Add stolen memory to SGX MMU */
352 	ret = psb_mmu_insert_pfn_sequence(psb_mmu_get_default_pd(dev_priv->mmu),
353 					  dev_priv->stolen_base >> PAGE_SHIFT,
354 					  pg->gatt_start,
355 					  pg->stolen_size >> PAGE_SHIFT, 0);
356 
357 	psb_mmu_set_pd_context(psb_mmu_get_default_pd(dev_priv->mmu), 0);
358 	psb_mmu_set_pd_context(dev_priv->pf_pd, 1);
359 
360 	PSB_WSGX32(0x20000000, PSB_CR_PDS_EXEC_BASE);
361 	PSB_WSGX32(0x30000000, PSB_CR_BIF_3D_REQ_BASE);
362 
363 	acpi_video_register();
364 
365 	/* Setup vertical blanking handling */
366 	ret = drm_vblank_init(dev, dev_priv->num_pipe);
367 	if (ret)
368 		goto out_err;
369 
370 	/*
371 	 * Install interrupt handlers prior to powering off SGX or else we will
372 	 * crash.
373 	 */
374 	dev_priv->vdc_irq_mask = 0;
375 	dev_priv->pipestat[0] = 0;
376 	dev_priv->pipestat[1] = 0;
377 	dev_priv->pipestat[2] = 0;
378 	spin_lock_irqsave(&dev_priv->irqmask_lock, irqflags);
379 	PSB_WVDC32(0xFFFFFFFF, PSB_HWSTAM);
380 	PSB_WVDC32(0x00000000, PSB_INT_ENABLE_R);
381 	PSB_WVDC32(0xFFFFFFFF, PSB_INT_MASK_R);
382 	spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags);
383 
384 	gma_irq_install(dev);
385 
386 	dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */
387 
388 	psb_modeset_init(dev);
389 	drm_kms_helper_poll_init(dev);
390 
391 	/* Only add backlight support if we have LVDS or MIPI output */
392 	drm_connector_list_iter_begin(dev, &conn_iter);
393 	drm_for_each_connector_iter(connector, &conn_iter) {
394 		gma_encoder = gma_attached_encoder(connector);
395 
396 		if (gma_encoder->type == INTEL_OUTPUT_LVDS ||
397 		    gma_encoder->type == INTEL_OUTPUT_MIPI) {
398 			ret = gma_backlight_init(dev);
399 			if (ret == 0)
400 				acpi_video_register_backlight();
401 			break;
402 		}
403 	}
404 	drm_connector_list_iter_end(&conn_iter);
405 
406 	if (ret)
407 		return ret;
408 	psb_intel_opregion_enable_asle(dev);
409 
410 	return devm_add_action_or_reset(dev->dev, psb_device_release, dev);
411 
412 out_err:
413 	psb_driver_unload(dev);
414 	return ret;
415 }
416 
417 /*
418  * Hardware for gma500 is a hybrid device, which both acts as a PCI
419  * device (for legacy vga functionality) but also more like an
420  * integrated display on a SoC where the framebuffer simply
421  * resides in main memory and not in a special PCI bar (that
422  * internally redirects to a stolen range of main memory) like all
423  * other integrated PCI display devices implement it.
424  *
425  * To catch all cases we need to remove conflicting firmware devices
426  * for the stolen system memory and for the VGA functionality. As we
427  * currently cannot easily find the framebuffer's location in stolen
428  * memory, we remove all framebuffers here.
429  *
430  * TODO: Refactor psb_driver_load() to map vdc_reg earlier. Then
431  *       we might be able to read the framebuffer range from the
432  *       device.
433  */
434 static int gma_remove_conflicting_framebuffers(struct pci_dev *pdev,
435 					       const struct drm_driver *req_driver)
436 {
437 	resource_size_t base = 0;
438 	resource_size_t size = U32_MAX; /* 4 GiB HW limit */
439 	const char *name = req_driver->name;
440 	int ret;
441 
442 	ret = aperture_remove_conflicting_devices(base, size, name);
443 	if (ret)
444 		return ret;
445 
446 	return __aperture_remove_legacy_vga_devices(pdev);
447 }
448 
449 static int psb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
450 {
451 	struct drm_psb_private *dev_priv;
452 	struct drm_device *dev;
453 	int ret;
454 
455 	ret = gma_remove_conflicting_framebuffers(pdev, &driver);
456 	if (ret)
457 		return ret;
458 
459 	ret = pcim_enable_device(pdev);
460 	if (ret)
461 		return ret;
462 
463 	dev_priv = devm_drm_dev_alloc(&pdev->dev, &driver, struct drm_psb_private, dev);
464 	if (IS_ERR(dev_priv))
465 		return PTR_ERR(dev_priv);
466 	dev = &dev_priv->dev;
467 
468 	pci_set_drvdata(pdev, dev);
469 
470 	ret = psb_driver_load(dev, ent->driver_data);
471 	if (ret)
472 		return ret;
473 
474 	ret = drm_dev_register(dev, ent->driver_data);
475 	if (ret)
476 		return ret;
477 
478 	psb_fbdev_setup(dev_priv);
479 
480 	return 0;
481 }
482 
483 static void psb_pci_remove(struct pci_dev *pdev)
484 {
485 	struct drm_device *dev = pci_get_drvdata(pdev);
486 
487 	drm_dev_unregister(dev);
488 }
489 
490 static DEFINE_RUNTIME_DEV_PM_OPS(psb_pm_ops, gma_power_suspend, gma_power_resume, NULL);
491 
492 static const struct file_operations psb_gem_fops = {
493 	.owner = THIS_MODULE,
494 	.open = drm_open,
495 	.release = drm_release,
496 	.unlocked_ioctl = drm_ioctl,
497 	.compat_ioctl = drm_compat_ioctl,
498 	.mmap = drm_gem_mmap,
499 	.poll = drm_poll,
500 	.read = drm_read,
501 };
502 
503 static const struct drm_driver driver = {
504 	.driver_features = DRIVER_MODESET | DRIVER_GEM,
505 
506 	.num_ioctls = ARRAY_SIZE(psb_ioctls),
507 
508 	.dumb_create = psb_gem_dumb_create,
509 	.ioctls = psb_ioctls,
510 	.fops = &psb_gem_fops,
511 	.name = DRIVER_NAME,
512 	.desc = DRIVER_DESC,
513 	.date = DRIVER_DATE,
514 	.major = DRIVER_MAJOR,
515 	.minor = DRIVER_MINOR,
516 	.patchlevel = DRIVER_PATCHLEVEL
517 };
518 
519 static struct pci_driver psb_pci_driver = {
520 	.name = DRIVER_NAME,
521 	.id_table = pciidlist,
522 	.probe = psb_pci_probe,
523 	.remove = psb_pci_remove,
524 	.driver.pm = &psb_pm_ops,
525 };
526 
527 static int __init psb_init(void)
528 {
529 	if (drm_firmware_drivers_only())
530 		return -ENODEV;
531 
532 	return pci_register_driver(&psb_pci_driver);
533 }
534 
535 static void __exit psb_exit(void)
536 {
537 	pci_unregister_driver(&psb_pci_driver);
538 }
539 
540 late_initcall(psb_init);
541 module_exit(psb_exit);
542 
543 MODULE_AUTHOR(DRIVER_AUTHOR);
544 MODULE_DESCRIPTION(DRIVER_DESC);
545 MODULE_LICENSE("GPL");
546