linux/drivers/char/agp/ali-agp.c
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   1/*
   2 * ALi AGPGART routines.
   3 */
   4
   5#include <linux/types.h>
   6#include <linux/module.h>
   7#include <linux/pci.h>
   8#include <linux/init.h>
   9#include <linux/agp_backend.h>
  10#include <asm/page.h>           /* PAGE_SIZE */
  11#include "agp.h"
  12
  13#define ALI_AGPCTRL     0xb8
  14#define ALI_ATTBASE     0xbc
  15#define ALI_TLBCTRL     0xc0
  16#define ALI_TAGCTRL     0xc4
  17#define ALI_CACHE_FLUSH_CTRL    0xD0
  18#define ALI_CACHE_FLUSH_ADDR_MASK       0xFFFFF000
  19#define ALI_CACHE_FLUSH_EN      0x100
  20
  21static int ali_fetch_size(void)
  22{
  23        int i;
  24        u32 temp;
  25        struct aper_size_info_32 *values;
  26
  27        pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  28        temp &= ~(0xfffffff0);
  29        values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
  30
  31        for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  32                if (temp == values[i].size_value) {
  33                        agp_bridge->previous_size =
  34                            agp_bridge->current_size = (void *) (values + i);
  35                        agp_bridge->aperture_size_idx = i;
  36                        return values[i].size;
  37                }
  38        }
  39
  40        return 0;
  41}
  42
  43static void ali_tlbflush(struct agp_memory *mem)
  44{
  45        u32 temp;
  46
  47        pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  48        temp &= 0xfffffff0;
  49        temp |= (1<<0 | 1<<1);
  50        pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL, temp);
  51}
  52
  53static void ali_cleanup(void)
  54{
  55        struct aper_size_info_32 *previous_size;
  56        u32 temp;
  57
  58        previous_size = A_SIZE_32(agp_bridge->previous_size);
  59
  60        pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  61// clear tag
  62        pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL,
  63                        ((temp & 0xffffff00) | 0x00000001|0x00000002));
  64
  65        pci_read_config_dword(agp_bridge->dev,  ALI_ATTBASE, &temp);
  66        pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE,
  67                        ((temp & 0x00000ff0) | previous_size->size_value));
  68}
  69
  70static int ali_configure(void)
  71{
  72        u32 temp;
  73        struct aper_size_info_32 *current_size;
  74
  75        current_size = A_SIZE_32(agp_bridge->current_size);
  76
  77        /* aperture size and gatt addr */
  78        pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
  79        temp = (((temp & 0x00000ff0) | (agp_bridge->gatt_bus_addr & 0xfffff000))
  80                        | (current_size->size_value & 0xf));
  81        pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE, temp);
  82
  83        /* tlb control */
  84        pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
  85        pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
  86
  87        /* address to map to */
  88        agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
  89                                                    AGP_APERTURE_BAR);
  90
  91#if 0
  92        if (agp_bridge->type == ALI_M1541) {
  93                u32 nlvm_addr = 0;
  94
  95                switch (current_size->size_value) {
  96                        case 0:  break;
  97                        case 1:  nlvm_addr = 0x100000;break;
  98                        case 2:  nlvm_addr = 0x200000;break;
  99                        case 3:  nlvm_addr = 0x400000;break;
 100                        case 4:  nlvm_addr = 0x800000;break;
 101                        case 6:  nlvm_addr = 0x1000000;break;
 102                        case 7:  nlvm_addr = 0x2000000;break;
 103                        case 8:  nlvm_addr = 0x4000000;break;
 104                        case 9:  nlvm_addr = 0x8000000;break;
 105                        case 10: nlvm_addr = 0x10000000;break;
 106                        default: break;
 107                }
 108                nlvm_addr--;
 109                nlvm_addr&=0xfff00000;
 110
 111                nlvm_addr+= agp_bridge->gart_bus_addr;
 112                nlvm_addr|=(agp_bridge->gart_bus_addr>>12);
 113                dev_info(&agp_bridge->dev->dev, "nlvm top &base = %8x\n",
 114                         nlvm_addr);
 115        }
 116#endif
 117
 118        pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
 119        temp &= 0xffffff7f;             //enable TLB
 120        pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
 121
 122        return 0;
 123}
 124
 125
 126static void m1541_cache_flush(void)
 127{
 128        int i, page_count;
 129        u32 temp;
 130
 131        global_cache_flush();
 132
 133        page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
 134        for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
 135                pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 136                                &temp);
 137                pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 138                                (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 139                                  (agp_bridge->gatt_bus_addr + i)) |
 140                                 ALI_CACHE_FLUSH_EN));
 141        }
 142}
 143
 144static struct page *m1541_alloc_page(struct agp_bridge_data *bridge)
 145{
 146        struct page *page = agp_generic_alloc_page(agp_bridge);
 147        u32 temp;
 148
 149        if (!page)
 150                return NULL;
 151
 152        pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 153        pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 154                        (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 155                          page_to_phys(page)) | ALI_CACHE_FLUSH_EN ));
 156        return page;
 157}
 158
 159static void ali_destroy_page(struct page *page, int flags)
 160{
 161        if (page) {
 162                if (flags & AGP_PAGE_DESTROY_UNMAP) {
 163                        global_cache_flush();   /* is this really needed?  --hch */
 164                        agp_generic_destroy_page(page, flags);
 165                } else
 166                        agp_generic_destroy_page(page, flags);
 167        }
 168}
 169
 170static void m1541_destroy_page(struct page *page, int flags)
 171{
 172        u32 temp;
 173
 174        if (page == NULL)
 175                return;
 176
 177        if (flags & AGP_PAGE_DESTROY_UNMAP) {
 178                global_cache_flush();
 179
 180                pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
 181                pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
 182                                       (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
 183                                         page_to_phys(page)) | ALI_CACHE_FLUSH_EN));
 184        }
 185        agp_generic_destroy_page(page, flags);
 186}
 187
 188
 189/* Setup function */
 190
 191static const struct aper_size_info_32 ali_generic_sizes[7] =
 192{
 193        {256, 65536, 6, 10},
 194        {128, 32768, 5, 9},
 195        {64, 16384, 4, 8},
 196        {32, 8192, 3, 7},
 197        {16, 4096, 2, 6},
 198        {8, 2048, 1, 4},
 199        {4, 1024, 0, 3}
 200};
 201
 202static const struct agp_bridge_driver ali_generic_bridge = {
 203        .owner                  = THIS_MODULE,
 204        .aperture_sizes         = ali_generic_sizes,
 205        .size_type              = U32_APER_SIZE,
 206        .num_aperture_sizes     = 7,
 207        .needs_scratch_page     = true,
 208        .configure              = ali_configure,
 209        .fetch_size             = ali_fetch_size,
 210        .cleanup                = ali_cleanup,
 211        .tlb_flush              = ali_tlbflush,
 212        .mask_memory            = agp_generic_mask_memory,
 213        .masks                  = NULL,
 214        .agp_enable             = agp_generic_enable,
 215        .cache_flush            = global_cache_flush,
 216        .create_gatt_table      = agp_generic_create_gatt_table,
 217        .free_gatt_table        = agp_generic_free_gatt_table,
 218        .insert_memory          = agp_generic_insert_memory,
 219        .remove_memory          = agp_generic_remove_memory,
 220        .alloc_by_type          = agp_generic_alloc_by_type,
 221        .free_by_type           = agp_generic_free_by_type,
 222        .agp_alloc_page         = agp_generic_alloc_page,
 223        .agp_destroy_page       = ali_destroy_page,
 224        .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 225};
 226
 227static const struct agp_bridge_driver ali_m1541_bridge = {
 228        .owner                  = THIS_MODULE,
 229        .aperture_sizes         = ali_generic_sizes,
 230        .size_type              = U32_APER_SIZE,
 231        .num_aperture_sizes     = 7,
 232        .configure              = ali_configure,
 233        .fetch_size             = ali_fetch_size,
 234        .cleanup                = ali_cleanup,
 235        .tlb_flush              = ali_tlbflush,
 236        .mask_memory            = agp_generic_mask_memory,
 237        .masks                  = NULL,
 238        .agp_enable             = agp_generic_enable,
 239        .cache_flush            = m1541_cache_flush,
 240        .create_gatt_table      = agp_generic_create_gatt_table,
 241        .free_gatt_table        = agp_generic_free_gatt_table,
 242        .insert_memory          = agp_generic_insert_memory,
 243        .remove_memory          = agp_generic_remove_memory,
 244        .alloc_by_type          = agp_generic_alloc_by_type,
 245        .free_by_type           = agp_generic_free_by_type,
 246        .agp_alloc_page         = m1541_alloc_page,
 247        .agp_destroy_page       = m1541_destroy_page,
 248        .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 249};
 250
 251
 252static struct agp_device_ids ali_agp_device_ids[] =
 253{
 254        {
 255                .device_id      = PCI_DEVICE_ID_AL_M1541,
 256                .chipset_name   = "M1541",
 257        },
 258        {
 259                .device_id      = PCI_DEVICE_ID_AL_M1621,
 260                .chipset_name   = "M1621",
 261        },
 262        {
 263                .device_id      = PCI_DEVICE_ID_AL_M1631,
 264                .chipset_name   = "M1631",
 265        },
 266        {
 267                .device_id      = PCI_DEVICE_ID_AL_M1632,
 268                .chipset_name   = "M1632",
 269        },
 270        {
 271                .device_id      = PCI_DEVICE_ID_AL_M1641,
 272                .chipset_name   = "M1641",
 273        },
 274        {
 275                .device_id      = PCI_DEVICE_ID_AL_M1644,
 276                .chipset_name   = "M1644",
 277        },
 278        {
 279                .device_id      = PCI_DEVICE_ID_AL_M1647,
 280                .chipset_name   = "M1647",
 281        },
 282        {
 283                .device_id      = PCI_DEVICE_ID_AL_M1651,
 284                .chipset_name   = "M1651",
 285        },
 286        {
 287                .device_id      = PCI_DEVICE_ID_AL_M1671,
 288                .chipset_name   = "M1671",
 289        },
 290        {
 291                .device_id      = PCI_DEVICE_ID_AL_M1681,
 292                .chipset_name   = "M1681",
 293        },
 294        {
 295                .device_id      = PCI_DEVICE_ID_AL_M1683,
 296                .chipset_name   = "M1683",
 297        },
 298
 299        { }, /* dummy final entry, always present */
 300};
 301
 302static int agp_ali_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 303{
 304        struct agp_device_ids *devs = ali_agp_device_ids;
 305        struct agp_bridge_data *bridge;
 306        u8 hidden_1621_id, cap_ptr;
 307        int j;
 308
 309        cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 310        if (!cap_ptr)
 311                return -ENODEV;
 312
 313        /* probe for known chipsets */
 314        for (j = 0; devs[j].chipset_name; j++) {
 315                if (pdev->device == devs[j].device_id)
 316                        goto found;
 317        }
 318
 319        dev_err(&pdev->dev, "unsupported ALi chipset [%04x/%04x])\n",
 320                pdev->vendor, pdev->device);
 321        return -ENODEV;
 322
 323
 324found:
 325        bridge = agp_alloc_bridge();
 326        if (!bridge)
 327                return -ENOMEM;
 328
 329        bridge->dev = pdev;
 330        bridge->capndx = cap_ptr;
 331
 332        switch (pdev->device) {
 333        case PCI_DEVICE_ID_AL_M1541:
 334                bridge->driver = &ali_m1541_bridge;
 335                break;
 336        case PCI_DEVICE_ID_AL_M1621:
 337                pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
 338                switch (hidden_1621_id) {
 339                case 0x31:
 340                        devs[j].chipset_name = "M1631";
 341                        break;
 342                case 0x32:
 343                        devs[j].chipset_name = "M1632";
 344                        break;
 345                case 0x41:
 346                        devs[j].chipset_name = "M1641";
 347                        break;
 348                case 0x43:
 349                        devs[j].chipset_name = "M1621";
 350                        break;
 351                case 0x47:
 352                        devs[j].chipset_name = "M1647";
 353                        break;
 354                case 0x51:
 355                        devs[j].chipset_name = "M1651";
 356                        break;
 357                default:
 358                        break;
 359                }
 360                fallthrough;
 361        default:
 362                bridge->driver = &ali_generic_bridge;
 363        }
 364
 365        dev_info(&pdev->dev, "ALi %s chipset\n", devs[j].chipset_name);
 366
 367        /* Fill in the mode register */
 368        pci_read_config_dword(pdev,
 369                        bridge->capndx+PCI_AGP_STATUS,
 370                        &bridge->mode);
 371
 372        pci_set_drvdata(pdev, bridge);
 373        return agp_add_bridge(bridge);
 374}
 375
 376static void agp_ali_remove(struct pci_dev *pdev)
 377{
 378        struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 379
 380        agp_remove_bridge(bridge);
 381        agp_put_bridge(bridge);
 382}
 383
 384static const struct pci_device_id agp_ali_pci_table[] = {
 385        {
 386        .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 387        .class_mask     = ~0,
 388        .vendor         = PCI_VENDOR_ID_AL,
 389        .device         = PCI_ANY_ID,
 390        .subvendor      = PCI_ANY_ID,
 391        .subdevice      = PCI_ANY_ID,
 392        },
 393        { }
 394};
 395
 396MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
 397
 398static struct pci_driver agp_ali_pci_driver = {
 399        .name           = "agpgart-ali",
 400        .id_table       = agp_ali_pci_table,
 401        .probe          = agp_ali_probe,
 402        .remove         = agp_ali_remove,
 403};
 404
 405static int __init agp_ali_init(void)
 406{
 407        if (agp_off)
 408                return -EINVAL;
 409        return pci_register_driver(&agp_ali_pci_driver);
 410}
 411
 412static void __exit agp_ali_cleanup(void)
 413{
 414        pci_unregister_driver(&agp_ali_pci_driver);
 415}
 416
 417module_init(agp_ali_init);
 418module_exit(agp_ali_cleanup);
 419
 420MODULE_AUTHOR("Dave Jones");
 421MODULE_LICENSE("GPL and additional rights");
 422
 423