linux/drivers/video/fbdev/via/via-core.c
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   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 */
  25static 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 */
  38static 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 */
  51static struct viafb_dev global_dev;
  52
  53
  54/*
  55 * Basic register access; spinlock required.
  56 */
  57static inline void viafb_mmio_write(int reg, u32 v)
  58{
  59        iowrite32(v, global_dev.engine_mmio + reg);
  60}
  61
  62static 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 */
  81static u32 viafb_enabled_ints;
  82
  83static 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 */
  94void viafb_irq_enable(u32 mask)
  95{
  96        viafb_enabled_ints |= mask;
  97        viafb_mmio_write(VDE_INTERRUPT, viafb_enabled_ints | VDE_I_ENABLE);
  98}
  99EXPORT_SYMBOL_GPL(viafb_irq_enable);
 100
 101void 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}
 110EXPORT_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 */
 132static int viafb_dma_users;
 133static 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 */
 139static DEFINE_MUTEX(viafb_dma_lock);
 140
 141/*
 142 * The VX855 DMA descriptor (used for s/g transfers) looks
 143 * like this.
 144 */
 145struct 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 */
 165static 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 */
 184int 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}
 210EXPORT_SYMBOL_GPL(viafb_request_dma);
 211
 212void 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}
 222EXPORT_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 */
 228int 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}
 304EXPORT_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 */
 313static 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 */
 321static 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 */
 435static 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;
 478out_unmap:
 479        iounmap(vdev->engine_mmio);
 480        return ret;
 481}
 482
 483static 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 */
 492static 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
 510static 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
 533static 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
 547static 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 */
 561static __maybe_unused LIST_HEAD(viafb_pm_hooks);
 562static __maybe_unused DEFINE_MUTEX(viafb_pm_hooks_lock);
 563
 564void 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}
 572EXPORT_SYMBOL_GPL(viafb_pm_register);
 573
 574void 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}
 580EXPORT_SYMBOL_GPL(viafb_pm_unregister);
 581
 582static 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
 603static 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
 616static 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
 652out_subdevs:
 653        via_teardown_subdevs();
 654        via_pci_teardown_mmio(&global_dev);
 655out_disable:
 656        pci_disable_device(pdev);
 657        return ret;
 658}
 659
 660static 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
 669static 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};
 698MODULE_DEVICE_TABLE(pci, via_pci_table);
 699
 700static 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
 711static 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
 719static 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
 731static 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
 739module_init(via_core_init);
 740module_exit(via_core_exit);
 741
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