linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
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   1/*
   2 * Linux driver attachment glue for PCI based controllers.
   3 *
   4 * Copyright (c) 2000-2001 Adaptec Inc.
   5 * All rights reserved.
   6 *
   7 * Redistribution and use in source and binary forms, with or without
   8 * modification, are permitted provided that the following conditions
   9 * are met:
  10 * 1. Redistributions of source code must retain the above copyright
  11 *    notice, this list of conditions, and the following disclaimer,
  12 *    without modification.
  13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14 *    substantially similar to the "NO WARRANTY" disclaimer below
  15 *    ("Disclaimer") and any redistribution must be conditioned upon
  16 *    including a substantially similar Disclaimer requirement for further
  17 *    binary redistribution.
  18 * 3. Neither the names of the above-listed copyright holders nor the names
  19 *    of any contributors may be used to endorse or promote products derived
  20 *    from this software without specific prior written permission.
  21 *
  22 * Alternatively, this software may be distributed under the terms of the
  23 * GNU General Public License ("GPL") version 2 as published by the Free
  24 * Software Foundation.
  25 *
  26 * NO WARRANTY
  27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37 * POSSIBILITY OF SUCH DAMAGES.
  38 *
  39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
  40 */
  41
  42#include "aic7xxx_osm.h"
  43#include "aic7xxx_pci.h"
  44
  45/* Define the macro locally since it's different for different class of chips.
  46*/
  47#define ID(x)   ID_C(x, PCI_CLASS_STORAGE_SCSI)
  48
  49static const struct pci_device_id ahc_linux_pci_id_table[] = {
  50        /* aic7850 based controllers */
  51        ID(ID_AHA_2902_04_10_15_20C_30C),
  52        /* aic7860 based controllers */
  53        ID(ID_AHA_2930CU),
  54        ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
  55        ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
  56        ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
  57        ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
  58        /* aic7870 based controllers */
  59        ID(ID_AHA_2940),
  60        ID(ID_AHA_3940),
  61        ID(ID_AHA_398X),
  62        ID(ID_AHA_2944),
  63        ID(ID_AHA_3944),
  64        ID(ID_AHA_4944),
  65        /* aic7880 based controllers */
  66        ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
  67        ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
  68        ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
  69        ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
  70        ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
  71        ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
  72        ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
  73        ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
  74        ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
  75        /* aic7890 based controllers */
  76        ID(ID_AHA_2930U2),
  77        ID(ID_AHA_2940U2B),
  78        ID(ID_AHA_2940U2_OEM),
  79        ID(ID_AHA_2940U2),
  80        ID(ID_AHA_2950U2B),
  81        ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
  82        ID(ID_AAA_131U2),
  83        /* aic7890 based controllers */
  84        ID(ID_AHA_29160),
  85        ID(ID_AHA_29160_CPQ),
  86        ID(ID_AHA_29160N),
  87        ID(ID_AHA_29160C),
  88        ID(ID_AHA_29160B),
  89        ID(ID_AHA_19160B),
  90        ID(ID_AIC7892_ARO),
  91        /* aic7892 based controllers */
  92        ID(ID_AHA_2940U_DUAL),
  93        ID(ID_AHA_3940AU),
  94        ID(ID_AHA_3944AU),
  95        ID(ID_AIC7895_ARO),
  96        ID(ID_AHA_3950U2B_0),
  97        ID(ID_AHA_3950U2B_1),
  98        ID(ID_AHA_3950U2D_0),
  99        ID(ID_AHA_3950U2D_1),
 100        ID(ID_AIC7896_ARO),
 101        /* aic7899 based controllers */
 102        ID(ID_AHA_3960D),
 103        ID(ID_AHA_3960D_CPQ),
 104        ID(ID_AIC7899_ARO),
 105        /* Generic chip probes for devices we don't know exactly. */
 106        ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
 107        ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
 108        ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
 109        ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
 110        ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
 111        ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
 112        ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
 113        ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
 114        ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
 115        ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
 116        ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
 117        ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
 118        ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
 119        { 0 }
 120};
 121
 122MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
 123
 124#ifdef CONFIG_PM
 125static int
 126ahc_linux_pci_dev_suspend(struct pci_dev *pdev, pm_message_t mesg)
 127{
 128        struct ahc_softc *ahc = pci_get_drvdata(pdev);
 129        int rc;
 130
 131        if ((rc = ahc_suspend(ahc)))
 132                return rc;
 133
 134        pci_save_state(pdev);
 135        pci_disable_device(pdev);
 136
 137        if (mesg.event & PM_EVENT_SLEEP)
 138                pci_set_power_state(pdev, PCI_D3hot);
 139
 140        return rc;
 141}
 142
 143static int
 144ahc_linux_pci_dev_resume(struct pci_dev *pdev)
 145{
 146        struct ahc_softc *ahc = pci_get_drvdata(pdev);
 147        int rc;
 148
 149        pci_set_power_state(pdev, PCI_D0);
 150        pci_restore_state(pdev);
 151
 152        if ((rc = pci_enable_device(pdev))) {
 153                dev_printk(KERN_ERR, &pdev->dev,
 154                           "failed to enable device after resume (%d)\n", rc);
 155                return rc;
 156        }
 157
 158        pci_set_master(pdev);
 159
 160        ahc_pci_resume(ahc);
 161
 162        return (ahc_resume(ahc));
 163}
 164#endif
 165
 166static void
 167ahc_linux_pci_dev_remove(struct pci_dev *pdev)
 168{
 169        struct ahc_softc *ahc = pci_get_drvdata(pdev);
 170        u_long s;
 171
 172        if (ahc->platform_data && ahc->platform_data->host)
 173                        scsi_remove_host(ahc->platform_data->host);
 174
 175        ahc_lock(ahc, &s);
 176        ahc_intr_enable(ahc, FALSE);
 177        ahc_unlock(ahc, &s);
 178        ahc_free(ahc);
 179}
 180
 181static void
 182ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
 183{
 184        struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
 185        unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
 186
 187        master_pdev = pci_get_slot(pdev->bus, master_devfn);
 188        if (master_pdev) {
 189                struct ahc_softc *master = pci_get_drvdata(master_pdev);
 190                if (master) {
 191                        ahc->flags &= ~AHC_BIOS_ENABLED; 
 192                        ahc->flags |= master->flags & AHC_BIOS_ENABLED;
 193
 194                        ahc->flags &= ~AHC_PRIMARY_CHANNEL; 
 195                        ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
 196                } else
 197                        printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
 198                pci_dev_put(master_pdev);
 199        } 
 200}
 201
 202static int
 203ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 204{
 205        char             buf[80];
 206        const uint64_t   mask_39bit = 0x7FFFFFFFFFULL;
 207        struct           ahc_softc *ahc;
 208        ahc_dev_softc_t  pci;
 209        const struct ahc_pci_identity *entry;
 210        char            *name;
 211        int              error;
 212        struct device   *dev = &pdev->dev;
 213
 214        pci = pdev;
 215        entry = ahc_find_pci_device(pci);
 216        if (entry == NULL)
 217                return (-ENODEV);
 218
 219        /*
 220         * Allocate a softc for this card and
 221         * set it up for attachment by our
 222         * common detect routine.
 223         */
 224        sprintf(buf, "ahc_pci:%d:%d:%d",
 225                ahc_get_pci_bus(pci),
 226                ahc_get_pci_slot(pci),
 227                ahc_get_pci_function(pci));
 228        name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
 229        if (name == NULL)
 230                return (-ENOMEM);
 231        strcpy(name, buf);
 232        ahc = ahc_alloc(NULL, name);
 233        if (ahc == NULL)
 234                return (-ENOMEM);
 235        if (pci_enable_device(pdev)) {
 236                ahc_free(ahc);
 237                return (-ENODEV);
 238        }
 239        pci_set_master(pdev);
 240
 241        if (sizeof(dma_addr_t) > 4
 242            && ahc->features & AHC_LARGE_SCBS
 243            && dma_set_mask(dev, mask_39bit) == 0
 244            && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {
 245                ahc->flags |= AHC_39BIT_ADDRESSING;
 246        } else {
 247                if (dma_set_mask(dev, DMA_BIT_MASK(32))) {
 248                        ahc_free(ahc);
 249                        printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
 250                        return (-ENODEV);
 251                }
 252        }
 253        ahc->dev_softc = pci;
 254        error = ahc_pci_config(ahc, entry);
 255        if (error != 0) {
 256                ahc_free(ahc);
 257                return (-error);
 258        }
 259
 260        /*
 261         * Second Function PCI devices need to inherit some
 262         * settings from function 0.
 263         */
 264        if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
 265                ahc_linux_pci_inherit_flags(ahc);
 266
 267        pci_set_drvdata(pdev, ahc);
 268        ahc_linux_register_host(ahc, &aic7xxx_driver_template);
 269        return (0);
 270}
 271
 272/******************************* PCI Routines *********************************/
 273uint32_t
 274ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 275{
 276        switch (width) {
 277        case 1:
 278        {
 279                uint8_t retval;
 280
 281                pci_read_config_byte(pci, reg, &retval);
 282                return (retval);
 283        }
 284        case 2:
 285        {
 286                uint16_t retval;
 287                pci_read_config_word(pci, reg, &retval);
 288                return (retval);
 289        }
 290        case 4:
 291        {
 292                uint32_t retval;
 293                pci_read_config_dword(pci, reg, &retval);
 294                return (retval);
 295        }
 296        default:
 297                panic("ahc_pci_read_config: Read size too big");
 298                /* NOTREACHED */
 299                return (0);
 300        }
 301}
 302
 303void
 304ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 305{
 306        switch (width) {
 307        case 1:
 308                pci_write_config_byte(pci, reg, value);
 309                break;
 310        case 2:
 311                pci_write_config_word(pci, reg, value);
 312                break;
 313        case 4:
 314                pci_write_config_dword(pci, reg, value);
 315                break;
 316        default:
 317                panic("ahc_pci_write_config: Write size too big");
 318                /* NOTREACHED */
 319        }
 320}
 321
 322
 323static struct pci_driver aic7xxx_pci_driver = {
 324        .name           = "aic7xxx",
 325        .probe          = ahc_linux_pci_dev_probe,
 326#ifdef CONFIG_PM
 327        .suspend        = ahc_linux_pci_dev_suspend,
 328        .resume         = ahc_linux_pci_dev_resume,
 329#endif
 330        .remove         = ahc_linux_pci_dev_remove,
 331        .id_table       = ahc_linux_pci_id_table
 332};
 333
 334int
 335ahc_linux_pci_init(void)
 336{
 337        return pci_register_driver(&aic7xxx_pci_driver);
 338}
 339
 340void
 341ahc_linux_pci_exit(void)
 342{
 343        pci_unregister_driver(&aic7xxx_pci_driver);
 344}
 345
 346static int
 347ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)
 348{
 349        if (aic7xxx_allow_memio == 0)
 350                return (ENOMEM);
 351
 352        *base = pci_resource_start(ahc->dev_softc, 0);
 353        if (*base == 0)
 354                return (ENOMEM);
 355        if (!request_region(*base, 256, "aic7xxx"))
 356                return (ENOMEM);
 357        return (0);
 358}
 359
 360static int
 361ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
 362                                 resource_size_t *bus_addr,
 363                                 uint8_t __iomem **maddr)
 364{
 365        resource_size_t start;
 366        int     error;
 367
 368        error = 0;
 369        start = pci_resource_start(ahc->dev_softc, 1);
 370        if (start != 0) {
 371                *bus_addr = start;
 372                if (!request_mem_region(start, 0x1000, "aic7xxx"))
 373                        error = ENOMEM;
 374                if (error == 0) {
 375                        *maddr = ioremap_nocache(start, 256);
 376                        if (*maddr == NULL) {
 377                                error = ENOMEM;
 378                                release_mem_region(start, 0x1000);
 379                        }
 380                }
 381        } else
 382                error = ENOMEM;
 383        return (error);
 384}
 385
 386int
 387ahc_pci_map_registers(struct ahc_softc *ahc)
 388{
 389        uint32_t command;
 390        resource_size_t base;
 391        uint8_t __iomem *maddr;
 392        int      error;
 393
 394        /*
 395         * If its allowed, we prefer memory mapped access.
 396         */
 397        command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
 398        command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
 399        base = 0;
 400        maddr = NULL;
 401        error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
 402        if (error == 0) {
 403                ahc->platform_data->mem_busaddr = base;
 404                ahc->tag = BUS_SPACE_MEMIO;
 405                ahc->bsh.maddr = maddr;
 406                ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
 407                                     command | PCIM_CMD_MEMEN, 4);
 408
 409                /*
 410                 * Do a quick test to see if memory mapped
 411                 * I/O is functioning correctly.
 412                 */
 413                if (ahc_pci_test_register_access(ahc) != 0) {
 414
 415                        printk("aic7xxx: PCI Device %d:%d:%d "
 416                               "failed memory mapped test.  Using PIO.\n",
 417                               ahc_get_pci_bus(ahc->dev_softc),
 418                               ahc_get_pci_slot(ahc->dev_softc),
 419                               ahc_get_pci_function(ahc->dev_softc));
 420                        iounmap(maddr);
 421                        release_mem_region(ahc->platform_data->mem_busaddr,
 422                                           0x1000);
 423                        ahc->bsh.maddr = NULL;
 424                        maddr = NULL;
 425                } else
 426                        command |= PCIM_CMD_MEMEN;
 427        } else {
 428                printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "
 429                       "unavailable. Cannot memory map device.\n",
 430                       ahc_get_pci_bus(ahc->dev_softc),
 431                       ahc_get_pci_slot(ahc->dev_softc),
 432                       ahc_get_pci_function(ahc->dev_softc),
 433                       (unsigned long long)base);
 434        }
 435
 436        /*
 437         * We always prefer memory mapped access.
 438         */
 439        if (maddr == NULL) {
 440
 441                error = ahc_linux_pci_reserve_io_region(ahc, &base);
 442                if (error == 0) {
 443                        ahc->tag = BUS_SPACE_PIO;
 444                        ahc->bsh.ioport = (u_long)base;
 445                        command |= PCIM_CMD_PORTEN;
 446                } else {
 447                        printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "
 448                               "unavailable. Cannot map device.\n",
 449                               ahc_get_pci_bus(ahc->dev_softc),
 450                               ahc_get_pci_slot(ahc->dev_softc),
 451                               ahc_get_pci_function(ahc->dev_softc),
 452                               (unsigned long long)base);
 453                }
 454        }
 455        ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
 456        return (error);
 457}
 458
 459int
 460ahc_pci_map_int(struct ahc_softc *ahc)
 461{
 462        int error;
 463
 464        error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
 465                            IRQF_SHARED, "aic7xxx", ahc);
 466        if (error == 0)
 467                ahc->platform_data->irq = ahc->dev_softc->irq;
 468        
 469        return (-error);
 470}
 471
 472