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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 without8 * modification, are permitted provided that the following conditions9 * are met:10 * 1. Redistributions of source code must retain the above copyright11 * notice, this list of conditions, and the following disclaimer,12 * without modification.13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer14 * substantially similar to the "NO WARRANTY" disclaimer below15 * ("Disclaimer") and any redistribution must be conditioned upon16 * including a substantially similar Disclaimer requirement for further17 * binary redistribution.18 * 3. Neither the names of the above-listed copyright holders nor the names19 * of any contributors may be used to endorse or promote products derived20 * from this software without specific prior written permission.21 *22 * Alternatively, this software may be distributed under the terms of the23 * GNU General Public License ("GPL") version 2 as published by the Free24 * Software Foundation.25 *26 * NO WARRANTY27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS33 * 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) ARISING36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE37 * 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 124static int __maybe_unused125ahc_linux_pci_dev_suspend(struct device *dev)126{127 struct ahc_softc *ahc = dev_get_drvdata(dev);128 129 return ahc_suspend(ahc);130}131 132static int __maybe_unused133ahc_linux_pci_dev_resume(struct device *dev)134{135 struct ahc_softc *ahc = dev_get_drvdata(dev);136 137 ahc_pci_resume(ahc);138 139 return (ahc_resume(ahc));140}141 142static void143ahc_linux_pci_dev_remove(struct pci_dev *pdev)144{145 struct ahc_softc *ahc = pci_get_drvdata(pdev);146 u_long s;147 148 if (ahc->platform_data && ahc->platform_data->host)149 scsi_remove_host(ahc->platform_data->host);150 151 ahc_lock(ahc, &s);152 ahc_intr_enable(ahc, FALSE);153 ahc_unlock(ahc, &s);154 ahc_free(ahc);155}156 157static void158ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)159{160 struct pci_dev *pdev = ahc->dev_softc, *master_pdev;161 unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);162 163 master_pdev = pci_get_slot(pdev->bus, master_devfn);164 if (master_pdev) {165 struct ahc_softc *master = pci_get_drvdata(master_pdev);166 if (master) {167 ahc->flags &= ~AHC_BIOS_ENABLED; 168 ahc->flags |= master->flags & AHC_BIOS_ENABLED;169 170 ahc->flags &= ~AHC_PRIMARY_CHANNEL; 171 ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;172 } else173 printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");174 pci_dev_put(master_pdev);175 } 176}177 178static int179ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)180{181 char buf[80];182 const uint64_t mask_39bit = 0x7FFFFFFFFFULL;183 struct ahc_softc *ahc;184 ahc_dev_softc_t pci;185 const struct ahc_pci_identity *entry;186 char *name;187 int error;188 struct device *dev = &pdev->dev;189 190 pci = pdev;191 entry = ahc_find_pci_device(pci);192 if (entry == NULL)193 return (-ENODEV);194 195 /*196 * Allocate a softc for this card and197 * set it up for attachment by our198 * common detect routine.199 */200 sprintf(buf, "ahc_pci:%d:%d:%d",201 ahc_get_pci_bus(pci),202 ahc_get_pci_slot(pci),203 ahc_get_pci_function(pci));204 name = kstrdup(buf, GFP_ATOMIC);205 if (name == NULL)206 return (-ENOMEM);207 ahc = ahc_alloc(NULL, name);208 if (ahc == NULL)209 return (-ENOMEM);210 if (pci_enable_device(pdev)) {211 ahc_free(ahc);212 return (-ENODEV);213 }214 pci_set_master(pdev);215 216 if (sizeof(dma_addr_t) > 4217 && ahc->features & AHC_LARGE_SCBS218 && dma_set_mask(dev, mask_39bit) == 0219 && dma_get_required_mask(dev) > DMA_BIT_MASK(32)) {220 ahc->flags |= AHC_39BIT_ADDRESSING;221 } else {222 if (dma_set_mask(dev, DMA_BIT_MASK(32))) {223 ahc_free(ahc);224 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");225 return (-ENODEV);226 }227 }228 ahc->dev_softc = pci;229 ahc->dev = &pci->dev;230 error = ahc_pci_config(ahc, entry);231 if (error != 0) {232 ahc_free(ahc);233 return (-error);234 }235 236 /*237 * Second Function PCI devices need to inherit some238 * settings from function 0.239 */240 if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)241 ahc_linux_pci_inherit_flags(ahc);242 243 pci_set_drvdata(pdev, ahc);244 return ahc_linux_register_host(ahc, &aic7xxx_driver_template);245}246 247/******************************* PCI Routines *********************************/248uint32_t249ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)250{251 switch (width) {252 case 1:253 {254 uint8_t retval;255 256 pci_read_config_byte(pci, reg, &retval);257 return (retval);258 }259 case 2:260 {261 uint16_t retval;262 pci_read_config_word(pci, reg, &retval);263 return (retval);264 }265 case 4:266 {267 uint32_t retval;268 pci_read_config_dword(pci, reg, &retval);269 return (retval);270 }271 default:272 panic("ahc_pci_read_config: Read size too big");273 /* NOTREACHED */274 return (0);275 }276}277 278void279ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)280{281 switch (width) {282 case 1:283 pci_write_config_byte(pci, reg, value);284 break;285 case 2:286 pci_write_config_word(pci, reg, value);287 break;288 case 4:289 pci_write_config_dword(pci, reg, value);290 break;291 default:292 panic("ahc_pci_write_config: Write size too big");293 /* NOTREACHED */294 }295}296 297static SIMPLE_DEV_PM_OPS(ahc_linux_pci_dev_pm_ops,298 ahc_linux_pci_dev_suspend,299 ahc_linux_pci_dev_resume);300 301static struct pci_driver aic7xxx_pci_driver = {302 .name = "aic7xxx",303 .probe = ahc_linux_pci_dev_probe,304 .driver.pm = &ahc_linux_pci_dev_pm_ops,305 .remove = ahc_linux_pci_dev_remove,306 .id_table = ahc_linux_pci_id_table307};308 309int310ahc_linux_pci_init(void)311{312 return pci_register_driver(&aic7xxx_pci_driver);313}314 315void316ahc_linux_pci_exit(void)317{318 pci_unregister_driver(&aic7xxx_pci_driver);319}320 321static int322ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, resource_size_t *base)323{324 if (aic7xxx_allow_memio == 0)325 return (ENOMEM);326 327 *base = pci_resource_start(ahc->dev_softc, 0);328 if (*base == 0)329 return (ENOMEM);330 if (!request_region(*base, 256, "aic7xxx"))331 return (ENOMEM);332 return (0);333}334 335static int336ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,337 resource_size_t *bus_addr,338 uint8_t __iomem **maddr)339{340 resource_size_t start;341 int error;342 343 error = 0;344 start = pci_resource_start(ahc->dev_softc, 1);345 if (start != 0) {346 *bus_addr = start;347 if (!request_mem_region(start, 0x1000, "aic7xxx"))348 error = ENOMEM;349 if (error == 0) {350 *maddr = ioremap(start, 256);351 if (*maddr == NULL) {352 error = ENOMEM;353 release_mem_region(start, 0x1000);354 }355 }356 } else357 error = ENOMEM;358 return (error);359}360 361int362ahc_pci_map_registers(struct ahc_softc *ahc)363{364 uint32_t command;365 resource_size_t base;366 uint8_t __iomem *maddr;367 int error;368 369 /*370 * If its allowed, we prefer memory mapped access.371 */372 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);373 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);374 base = 0;375 maddr = NULL;376 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);377 if (error == 0) {378 ahc->platform_data->mem_busaddr = base;379 ahc->tag = BUS_SPACE_MEMIO;380 ahc->bsh.maddr = maddr;381 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,382 command | PCIM_CMD_MEMEN, 4);383 384 /*385 * Do a quick test to see if memory mapped386 * I/O is functioning correctly.387 */388 if (ahc_pci_test_register_access(ahc) != 0) {389 390 printk("aic7xxx: PCI Device %d:%d:%d "391 "failed memory mapped test. Using PIO.\n",392 ahc_get_pci_bus(ahc->dev_softc),393 ahc_get_pci_slot(ahc->dev_softc),394 ahc_get_pci_function(ahc->dev_softc));395 iounmap(maddr);396 release_mem_region(ahc->platform_data->mem_busaddr,397 0x1000);398 ahc->bsh.maddr = NULL;399 maddr = NULL;400 } else401 command |= PCIM_CMD_MEMEN;402 } else {403 printk("aic7xxx: PCI%d:%d:%d MEM region 0x%llx "404 "unavailable. Cannot memory map device.\n",405 ahc_get_pci_bus(ahc->dev_softc),406 ahc_get_pci_slot(ahc->dev_softc),407 ahc_get_pci_function(ahc->dev_softc),408 (unsigned long long)base);409 }410 411 /*412 * We always prefer memory mapped access.413 */414 if (maddr == NULL) {415 416 error = ahc_linux_pci_reserve_io_region(ahc, &base);417 if (error == 0) {418 ahc->tag = BUS_SPACE_PIO;419 ahc->bsh.ioport = (u_long)base;420 command |= PCIM_CMD_PORTEN;421 } else {422 printk("aic7xxx: PCI%d:%d:%d IO region 0x%llx[0..255] "423 "unavailable. Cannot map device.\n",424 ahc_get_pci_bus(ahc->dev_softc),425 ahc_get_pci_slot(ahc->dev_softc),426 ahc_get_pci_function(ahc->dev_softc),427 (unsigned long long)base);428 }429 }430 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);431 return (error);432}433 434int435ahc_pci_map_int(struct ahc_softc *ahc)436{437 int error;438 439 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,440 IRQF_SHARED, "aic7xxx", ahc);441 if (error == 0)442 ahc->platform_data->irq = ahc->dev_softc->irq;443 444 return (-error);445}446 447