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 static int ahc_linux_pci_dev_probe(struct pci_dev *pdev,
46 const struct pci_device_id *ent);
47 static int ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
48 u_long *base);
49 static int ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
50 u_long *bus_addr,
51 uint8_t __iomem **maddr);
52 static void ahc_linux_pci_dev_remove(struct pci_dev *pdev);
53
54 /* Define the macro locally since it's different for different class of chips.
55 */
56 #define ID(x) ID_C(x, PCI_CLASS_STORAGE_SCSI)
57
58 static struct pci_device_id ahc_linux_pci_id_table[] = {
59 /* aic7850 based controllers */
60 ID(ID_AHA_2902_04_10_15_20C_30C),
61 /* aic7860 based controllers */
62 ID(ID_AHA_2930CU),
63 ID(ID_AHA_1480A & ID_DEV_VENDOR_MASK),
64 ID(ID_AHA_2940AU_0 & ID_DEV_VENDOR_MASK),
65 ID(ID_AHA_2940AU_CN & ID_DEV_VENDOR_MASK),
66 ID(ID_AHA_2930C_VAR & ID_DEV_VENDOR_MASK),
67 /* aic7870 based controllers */
68 ID(ID_AHA_2940),
69 ID(ID_AHA_3940),
70 ID(ID_AHA_398X),
71 ID(ID_AHA_2944),
72 ID(ID_AHA_3944),
73 ID(ID_AHA_4944),
74 /* aic7880 based controllers */
75 ID(ID_AHA_2940U & ID_DEV_VENDOR_MASK),
76 ID(ID_AHA_3940U & ID_DEV_VENDOR_MASK),
77 ID(ID_AHA_2944U & ID_DEV_VENDOR_MASK),
78 ID(ID_AHA_3944U & ID_DEV_VENDOR_MASK),
79 ID(ID_AHA_398XU & ID_DEV_VENDOR_MASK),
80 ID(ID_AHA_4944U & ID_DEV_VENDOR_MASK),
81 ID(ID_AHA_2930U & ID_DEV_VENDOR_MASK),
82 ID(ID_AHA_2940U_PRO & ID_DEV_VENDOR_MASK),
83 ID(ID_AHA_2940U_CN & ID_DEV_VENDOR_MASK),
84 /* aic7890 based controllers */
85 ID(ID_AHA_2930U2),
86 ID(ID_AHA_2940U2B),
87 ID(ID_AHA_2940U2_OEM),
88 ID(ID_AHA_2940U2),
89 ID(ID_AHA_2950U2B),
90 ID16(ID_AIC7890_ARO & ID_AIC7895_ARO_MASK),
91 ID(ID_AAA_131U2),
92 /* aic7890 based controllers */
93 ID(ID_AHA_29160),
94 ID(ID_AHA_29160_CPQ),
95 ID(ID_AHA_29160N),
96 ID(ID_AHA_29160C),
97 ID(ID_AHA_29160B),
98 ID(ID_AHA_19160B),
99 ID(ID_AIC7892_ARO),
100 /* aic7892 based controllers */
101 ID(ID_AHA_2940U_DUAL),
102 ID(ID_AHA_3940AU),
103 ID(ID_AHA_3944AU),
104 ID(ID_AIC7895_ARO),
105 ID(ID_AHA_3950U2B_0),
106 ID(ID_AHA_3950U2B_1),
107 ID(ID_AHA_3950U2D_0),
108 ID(ID_AHA_3950U2D_1),
109 ID(ID_AIC7896_ARO),
110 /* aic7899 based controllers */
111 ID(ID_AHA_3960D),
112 ID(ID_AHA_3960D_CPQ),
113 ID(ID_AIC7899_ARO),
114 /* Generic chip probes for devices we don't know exactly. */
115 ID(ID_AIC7850 & ID_DEV_VENDOR_MASK),
116 ID(ID_AIC7855 & ID_DEV_VENDOR_MASK),
117 ID(ID_AIC7859 & ID_DEV_VENDOR_MASK),
118 ID(ID_AIC7860 & ID_DEV_VENDOR_MASK),
119 ID(ID_AIC7870 & ID_DEV_VENDOR_MASK),
120 ID(ID_AIC7880 & ID_DEV_VENDOR_MASK),
121 ID16(ID_AIC7890 & ID_9005_GENERIC_MASK),
122 ID16(ID_AIC7892 & ID_9005_GENERIC_MASK),
123 ID(ID_AIC7895 & ID_DEV_VENDOR_MASK),
124 ID16(ID_AIC7896 & ID_9005_GENERIC_MASK),
125 ID16(ID_AIC7899 & ID_9005_GENERIC_MASK),
126 ID(ID_AIC7810 & ID_DEV_VENDOR_MASK),
127 ID(ID_AIC7815 & ID_DEV_VENDOR_MASK),
128 { 0 }
129 };
130
131 MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
132
133 struct pci_driver aic7xxx_pci_driver = {
134 .name = "aic7xxx",
135 .probe = ahc_linux_pci_dev_probe,
136 .remove = ahc_linux_pci_dev_remove,
137 .id_table = ahc_linux_pci_id_table
138 };
139
140 static void
141 ahc_linux_pci_dev_remove(struct pci_dev *pdev)
142 {
143 struct ahc_softc *ahc;
144 u_long l;
145
146 /*
147 * We should be able to just perform
148 * the free directly, but check our
149 * list for extra sanity.
150 */
151 ahc_list_lock(&l);
152 ahc = ahc_find_softc((struct ahc_softc *)pci_get_drvdata(pdev));
153 if (ahc != NULL) {
154 u_long s;
155
156 TAILQ_REMOVE(&ahc_tailq, ahc, links);
157 ahc_list_unlock(&l);
158 ahc_lock(ahc, &s);
159 ahc_intr_enable(ahc, FALSE);
160 ahc_unlock(ahc, &s);
161 ahc_free(ahc);
162 } else
163 ahc_list_unlock(&l);
164 }
165
166 static int
167 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
168 {
169 char buf[80];
170 const uint64_t mask_39bit = 0x7FFFFFFFFFULL;
171 struct ahc_softc *ahc;
172 ahc_dev_softc_t pci;
173 struct ahc_pci_identity *entry;
174 char *name;
175 int error;
176
177 /*
178 * Some BIOSen report the same device multiple times.
179 */
180 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
181 struct pci_dev *probed_pdev;
182
183 probed_pdev = ahc->dev_softc;
184 if (probed_pdev->bus->number == pdev->bus->number
185 && probed_pdev->devfn == pdev->devfn)
186 break;
187 }
188 if (ahc != NULL) {
189 /* Skip duplicate. */
190 return (-ENODEV);
191 }
192
193 pci = pdev;
194 entry = ahc_find_pci_device(pci);
195 if (entry == NULL)
196 return (-ENODEV);
197
198 /*
199 * Allocate a softc for this card and
200 * set it up for attachment by our
201 * common detect routine.
202 */
203 sprintf(buf, "ahc_pci:%d:%d:%d",
204 ahc_get_pci_bus(pci),
205 ahc_get_pci_slot(pci),
206 ahc_get_pci_function(pci));
207 name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
208 if (name == NULL)
209 return (-ENOMEM);
210 strcpy(name, buf);
211 ahc = ahc_alloc(NULL, name);
212 if (ahc == NULL)
213 return (-ENOMEM);
214 if (pci_enable_device(pdev)) {
215 ahc_free(ahc);
216 return (-ENODEV);
217 }
218 pci_set_master(pdev);
219
220 if (sizeof(dma_addr_t) > 4
221 && ahc_linux_get_memsize() > 0x80000000
222 && pci_set_dma_mask(pdev, mask_39bit) == 0) {
223 ahc->flags |= AHC_39BIT_ADDRESSING;
224 ahc->platform_data->hw_dma_mask = mask_39bit;
225 } else {
226 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
227 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
228 return (-ENODEV);
229 }
230 ahc->platform_data->hw_dma_mask = DMA_32BIT_MASK;
231 }
232 ahc->dev_softc = pci;
233 error = ahc_pci_config(ahc, entry);
234 if (error != 0) {
235 ahc_free(ahc);
236 return (-error);
237 }
238 pci_set_drvdata(pdev, ahc);
239 if (aic7xxx_detect_complete) {
240 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
241 ahc_linux_register_host(ahc, &aic7xxx_driver_template);
242 #else
243 printf("aic7xxx: ignoring PCI device found after "
244 "initialization\n");
245 return (-ENODEV);
246 #endif
247 }
248 return (0);
249 }
250
251 int
252 ahc_linux_pci_init(void)
253 {
254 /* Translate error or zero return into zero or one */
255 return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1;
256 }
257
258 void
259 ahc_linux_pci_exit(void)
260 {
261 pci_unregister_driver(&aic7xxx_pci_driver);
262 }
263
264 static int
265 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
266 {
267 if (aic7xxx_allow_memio == 0)
268 return (ENOMEM);
269
270 *base = pci_resource_start(ahc->dev_softc, 0);
271 if (*base == 0)
272 return (ENOMEM);
273 if (request_region(*base, 256, "aic7xxx") == 0)
274 return (ENOMEM);
275 return (0);
276 }
277
278 static int
279 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
280 u_long *bus_addr,
281 uint8_t __iomem **maddr)
282 {
283 u_long start;
284 int error;
285
286 error = 0;
287 start = pci_resource_start(ahc->dev_softc, 1);
288 if (start != 0) {
289 *bus_addr = start;
290 if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
291 error = ENOMEM;
292 if (error == 0) {
293 *maddr = ioremap_nocache(start, 256);
294 if (*maddr == NULL) {
295 error = ENOMEM;
296 release_mem_region(start, 0x1000);
297 }
298 }
299 } else
300 error = ENOMEM;
301 return (error);
302 }
303
304 int
305 ahc_pci_map_registers(struct ahc_softc *ahc)
306 {
307 uint32_t command;
308 u_long base;
309 uint8_t __iomem *maddr;
310 int error;
311
312 /*
313 * If its allowed, we prefer memory mapped access.
314 */
315 command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
316 command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
317 base = 0;
318 maddr = NULL;
319 error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
320 if (error == 0) {
321 ahc->platform_data->mem_busaddr = base;
322 ahc->tag = BUS_SPACE_MEMIO;
323 ahc->bsh.maddr = maddr;
324 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
325 command | PCIM_CMD_MEMEN, 4);
326
327 /*
328 * Do a quick test to see if memory mapped
329 * I/O is functioning correctly.
330 */
331 if (ahc_pci_test_register_access(ahc) != 0) {
332
333 printf("aic7xxx: PCI Device %d:%d:%d "
334 "failed memory mapped test. Using PIO.\n",
335 ahc_get_pci_bus(ahc->dev_softc),
336 ahc_get_pci_slot(ahc->dev_softc),
337 ahc_get_pci_function(ahc->dev_softc));
338 iounmap(maddr);
339 release_mem_region(ahc->platform_data->mem_busaddr,
340 0x1000);
341 ahc->bsh.maddr = NULL;
342 maddr = NULL;
343 } else
344 command |= PCIM_CMD_MEMEN;
345 } else {
346 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
347 "unavailable. Cannot memory map device.\n",
348 ahc_get_pci_bus(ahc->dev_softc),
349 ahc_get_pci_slot(ahc->dev_softc),
350 ahc_get_pci_function(ahc->dev_softc),
351 base);
352 }
353
354 /*
355 * We always prefer memory mapped access.
356 */
357 if (maddr == NULL) {
358
359 error = ahc_linux_pci_reserve_io_region(ahc, &base);
360 if (error == 0) {
361 ahc->tag = BUS_SPACE_PIO;
362 ahc->bsh.ioport = base;
363 command |= PCIM_CMD_PORTEN;
364 } else {
365 printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
366 "unavailable. Cannot map device.\n",
367 ahc_get_pci_bus(ahc->dev_softc),
368 ahc_get_pci_slot(ahc->dev_softc),
369 ahc_get_pci_function(ahc->dev_softc),
370 base);
371 }
372 }
373 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
374 return (error);
375 }
376
377 int
378 ahc_pci_map_int(struct ahc_softc *ahc)
379 {
380 int error;
381
382 error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
383 SA_SHIRQ, "aic7xxx", ahc);
384 if (error == 0)
385 ahc->platform_data->irq = ahc->dev_softc->irq;
386
387 return (-error);
388 }
389
390
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