2 * Linux driver attachment glue for PCI based controllers.
4 * Copyright (c) 2000-2001 Adaptec Inc.
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39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#47 $
42 #include "aic7xxx_osm.h"
44 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
50 static int ahc_linux_pci_dev_probe(struct pci_dev *pdev,
51 const struct pci_device_id *ent);
52 static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
54 static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
57 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
58 static void ahc_linux_pci_dev_remove(struct pci_dev *pdev);
60 /* We do our own ID filtering. So, grab all SCSI storage class devices. */
61 static struct pci_device_id ahc_linux_pci_id_table[] = {
63 0x9004, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
64 PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
67 0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
68 PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
73 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
75 struct pci_driver aic7xxx_pci_driver = {
77 .probe = ahc_linux_pci_dev_probe,
78 .remove = ahc_linux_pci_dev_remove,
79 .id_table = ahc_linux_pci_id_table
83 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
85 struct ahc_softc *ahc;
89 * We should be able to just perform
90 * the free directly, but check our
91 * list for extra sanity.
94 ahc = ahc_find_softc((struct ahc_softc *)pci_get_drvdata(pdev));
98 TAILQ_REMOVE(&ahc_tailq, ahc, links);
101 ahc_intr_enable(ahc, FALSE);
107 #endif /* !LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) */
110 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
113 bus_addr_t mask_39bit;
114 struct ahc_softc *ahc;
116 struct ahc_pci_identity *entry;
121 * Some BIOSen report the same device multiple times.
123 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
124 struct pci_dev *probed_pdev;
126 probed_pdev = ahc->dev_softc;
127 if (probed_pdev->bus->number == pdev->bus->number
128 && probed_pdev->devfn == pdev->devfn)
132 /* Skip duplicate. */
137 entry = ahc_find_pci_device(pci);
142 * Allocate a softc for this card and
143 * set it up for attachment by our
144 * common detect routine.
146 sprintf(buf, "ahc_pci:%d:%d:%d",
147 ahc_get_pci_bus(pci),
148 ahc_get_pci_slot(pci),
149 ahc_get_pci_function(pci));
150 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
154 ahc = ahc_alloc(NULL, name);
157 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
158 if (pci_enable_device(pdev)) {
162 pci_set_master(pdev);
164 mask_39bit = (bus_addr_t)0x7FFFFFFFFFULL;
165 if (sizeof(bus_addr_t) > 4
166 && ahc_linux_get_memsize() > 0x80000000
167 && ahc_pci_set_dma_mask(pdev, mask_39bit) == 0) {
168 ahc->flags |= AHC_39BIT_ADDRESSING;
169 ahc->platform_data->hw_dma_mask = mask_39bit;
171 if (ahc_pci_set_dma_mask(pdev, 0xFFFFFFFF)) {
172 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
175 ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
178 ahc->dev_softc = pci;
179 error = ahc_pci_config(ahc, entry);
184 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
185 pci_set_drvdata(pdev, ahc);
186 if (aic7xxx_detect_complete) {
187 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
188 ahc_linux_register_host(ahc, &aic7xxx_driver_template);
190 printf("aic7xxx: ignoring PCI device found after "
200 ahc_linux_pci_init(void)
202 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
203 /* Translate error or zero return into zero or one */
204 return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1;
206 struct pci_dev *pdev;
210 /* If we don't have a PCI bus, we can't find any adapters. */
211 if (pci_present() == 0)
216 class = PCI_CLASS_STORAGE_SCSI << 8;
217 while ((pdev = pci_find_class(class, pdev)) != NULL) {
222 error = ahc_linux_pci_dev_probe(pdev, /*pci_devid*/NULL);
231 ahc_linux_pci_exit(void)
233 pci_unregister_driver(&aic7xxx_pci_driver);
237 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
239 if (aic7xxx_allow_memio == 0)
242 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
243 *base = pci_resource_start(ahc->dev_softc, 0);
245 *base = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS, 4);
246 *base &= PCI_BASE_ADDRESS_IO_MASK;
250 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
251 if (check_region(*base, 256) != 0)
253 request_region(*base, 256, "aic7xxx");
255 if (request_region(*base, 256, "aic7xxx") == 0)
262 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
272 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
273 start = pci_resource_start(ahc->dev_softc, 1);
274 base_page = start & PAGE_MASK;
275 base_offset = start - base_page;
277 start = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS+4, 4);
278 base_offset = start & PCI_BASE_ADDRESS_MEM_MASK;
279 base_page = base_offset & PAGE_MASK;
280 base_offset -= base_page;
284 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
285 if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
289 *maddr = ioremap_nocache(base_page, base_offset + 256);
290 if (*maddr == NULL) {
292 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
293 release_mem_region(start, 0x1000);
296 *maddr += base_offset;
304 ahc_pci_map_registers(struct ahc_softc *ahc)
312 * If its allowed, we prefer memory mapped access.
314 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
315 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
318 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
320 ahc->platform_data->mem_busaddr = base;
321 ahc->tag = BUS_SPACE_MEMIO;
322 ahc->bsh.maddr = maddr;
323 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
324 command | PCIM_CMD_MEMEN, 4);
327 * Do a quick test to see if memory mapped
328 * I/O is functioning correctly.
330 if (ahc_pci_test_register_access(ahc) != 0) {
332 printf("aic7xxx: PCI Device %d:%d:%d "
333 "failed memory mapped test. Using PIO.\n",
334 ahc_get_pci_bus(ahc->dev_softc),
335 ahc_get_pci_slot(ahc->dev_softc),
336 ahc_get_pci_function(ahc->dev_softc));
337 iounmap((void *)((u_long)maddr & PAGE_MASK));
338 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
339 release_mem_region(ahc->platform_data->mem_busaddr,
342 ahc->bsh.maddr = NULL;
345 command |= PCIM_CMD_MEMEN;
347 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
348 "unavailable. Cannot memory map device.\n",
349 ahc_get_pci_bus(ahc->dev_softc),
350 ahc_get_pci_slot(ahc->dev_softc),
351 ahc_get_pci_function(ahc->dev_softc),
356 * We always prefer memory mapped access.
360 error = ahc_linux_pci_reserve_io_region(ahc, &base);
362 ahc->tag = BUS_SPACE_PIO;
363 ahc->bsh.ioport = base;
364 command |= PCIM_CMD_PORTEN;
366 printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
367 "unavailable. Cannot map device.\n",
368 ahc_get_pci_bus(ahc->dev_softc),
369 ahc_get_pci_slot(ahc->dev_softc),
370 ahc_get_pci_function(ahc->dev_softc),
374 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
379 ahc_pci_map_int(struct ahc_softc *ahc)
383 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
384 SA_SHIRQ, "aic7xxx", ahc);
386 ahc->platform_data->irq = ahc->dev_softc->irq;
392 ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
394 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
395 pci_set_power_state(ahc->dev_softc, new_state);
401 * Traverse the capability list looking for
402 * the power management capability.
405 cap_offset = ahc_pci_read_config(ahc->dev_softc,
406 PCIR_CAP_PTR, /*bytes*/1);
407 while (cap_offset != 0) {
409 cap = ahc_pci_read_config(ahc->dev_softc,
410 cap_offset, /*bytes*/4);
411 if ((cap & 0xFF) == 1
412 && ((cap >> 16) & 0x3) > 0) {
415 pm_control = ahc_pci_read_config(ahc->dev_softc,
419 pm_control |= new_state;
420 ahc_pci_write_config(ahc->dev_softc,
422 pm_control, /*bytes*/2);
425 cap_offset = (cap >> 8) & 0xFF;