Merge /spare/repo/linux-2.6/
[linux-2.6] / drivers / scsi / aic7xxx / aic7xxx_osm_pci.c
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 = pci_get_drvdata(pdev);
144         u_long s;
145
146         if (ahc->platform_data && ahc->platform_data->host)
147                         scsi_remove_host(ahc->platform_data->host);
148
149         ahc_lock(ahc, &s);
150         ahc_intr_enable(ahc, FALSE);
151         ahc_unlock(ahc, &s);
152         ahc_free(ahc);
153 }
154
155 static void
156 ahc_linux_pci_inherit_flags(struct ahc_softc *ahc)
157 {
158         struct pci_dev *pdev = ahc->dev_softc, *master_pdev;
159         unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);
160
161         master_pdev = pci_get_slot(pdev->bus, master_devfn);
162         if (master_pdev) {
163                 struct ahc_softc *master = pci_get_drvdata(master_pdev);
164                 if (master) {
165                         ahc->flags &= ~AHC_BIOS_ENABLED; 
166                         ahc->flags |= master->flags & AHC_BIOS_ENABLED;
167
168                         ahc->flags &= ~AHC_PRIMARY_CHANNEL; 
169                         ahc->flags |= master->flags & AHC_PRIMARY_CHANNEL;
170                 } else
171                         printk(KERN_ERR "aic7xxx: no multichannel peer found!\n");
172                 pci_dev_put(master_pdev);
173         } 
174 }
175
176 static int
177 ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
178 {
179         char             buf[80];
180         const uint64_t   mask_39bit = 0x7FFFFFFFFFULL;
181         struct           ahc_softc *ahc;
182         ahc_dev_softc_t  pci;
183         struct           ahc_pci_identity *entry;
184         char            *name;
185         int              error;
186         struct device   *dev = &pdev->dev;
187
188         pci = pdev;
189         entry = ahc_find_pci_device(pci);
190         if (entry == NULL)
191                 return (-ENODEV);
192
193         /*
194          * Allocate a softc for this card and
195          * set it up for attachment by our
196          * common detect routine.
197          */
198         sprintf(buf, "ahc_pci:%d:%d:%d",
199                 ahc_get_pci_bus(pci),
200                 ahc_get_pci_slot(pci),
201                 ahc_get_pci_function(pci));
202         name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
203         if (name == NULL)
204                 return (-ENOMEM);
205         strcpy(name, buf);
206         ahc = ahc_alloc(NULL, name);
207         if (ahc == NULL)
208                 return (-ENOMEM);
209         if (pci_enable_device(pdev)) {
210                 ahc_free(ahc);
211                 return (-ENODEV);
212         }
213         pci_set_master(pdev);
214
215         if (sizeof(dma_addr_t) > 4
216             && ahc->features & AHC_LARGE_SCBS
217             && dma_set_mask(dev, mask_39bit) == 0
218             && dma_get_required_mask(dev) > DMA_32BIT_MASK) {
219                 ahc->flags |= AHC_39BIT_ADDRESSING;
220         } else {
221                 if (dma_set_mask(dev, DMA_32BIT_MASK)) {
222                         printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
223                         return (-ENODEV);
224                 }
225         }
226         ahc->dev_softc = pci;
227         error = ahc_pci_config(ahc, entry);
228         if (error != 0) {
229                 ahc_free(ahc);
230                 return (-error);
231         }
232
233         /*
234          * Second Function PCI devices need to inherit some
235          * settings from function 0.
236          */
237         if ((ahc->features & AHC_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
238                 ahc_linux_pci_inherit_flags(ahc);
239
240         pci_set_drvdata(pdev, ahc);
241         ahc_linux_register_host(ahc, &aic7xxx_driver_template);
242         return (0);
243 }
244
245 int
246 ahc_linux_pci_init(void)
247 {
248         /* Translate error or zero return into zero or one */
249         return pci_module_init(&aic7xxx_pci_driver) ? 0 : 1;
250 }
251
252 void
253 ahc_linux_pci_exit(void)
254 {
255         pci_unregister_driver(&aic7xxx_pci_driver);
256 }
257
258 static int
259 ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
260 {
261         if (aic7xxx_allow_memio == 0)
262                 return (ENOMEM);
263
264         *base = pci_resource_start(ahc->dev_softc, 0);
265         if (*base == 0)
266                 return (ENOMEM);
267         if (request_region(*base, 256, "aic7xxx") == 0)
268                 return (ENOMEM);
269         return (0);
270 }
271
272 static int
273 ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
274                                  u_long *bus_addr,
275                                  uint8_t __iomem **maddr)
276 {
277         u_long  start;
278         int     error;
279
280         error = 0;
281         start = pci_resource_start(ahc->dev_softc, 1);
282         if (start != 0) {
283                 *bus_addr = start;
284                 if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
285                         error = ENOMEM;
286                 if (error == 0) {
287                         *maddr = ioremap_nocache(start, 256);
288                         if (*maddr == NULL) {
289                                 error = ENOMEM;
290                                 release_mem_region(start, 0x1000);
291                         }
292                 }
293         } else
294                 error = ENOMEM;
295         return (error);
296 }
297
298 int
299 ahc_pci_map_registers(struct ahc_softc *ahc)
300 {
301         uint32_t command;
302         u_long   base;
303         uint8_t __iomem *maddr;
304         int      error;
305
306         /*
307          * If its allowed, we prefer memory mapped access.
308          */
309         command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
310         command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
311         base = 0;
312         maddr = NULL;
313         error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
314         if (error == 0) {
315                 ahc->platform_data->mem_busaddr = base;
316                 ahc->tag = BUS_SPACE_MEMIO;
317                 ahc->bsh.maddr = maddr;
318                 ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
319                                      command | PCIM_CMD_MEMEN, 4);
320
321                 /*
322                  * Do a quick test to see if memory mapped
323                  * I/O is functioning correctly.
324                  */
325                 if (ahc_pci_test_register_access(ahc) != 0) {
326
327                         printf("aic7xxx: PCI Device %d:%d:%d "
328                                "failed memory mapped test.  Using PIO.\n",
329                                ahc_get_pci_bus(ahc->dev_softc),
330                                ahc_get_pci_slot(ahc->dev_softc),
331                                ahc_get_pci_function(ahc->dev_softc));
332                         iounmap(maddr);
333                         release_mem_region(ahc->platform_data->mem_busaddr,
334                                            0x1000);
335                         ahc->bsh.maddr = NULL;
336                         maddr = NULL;
337                 } else
338                         command |= PCIM_CMD_MEMEN;
339         } else {
340                 printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
341                        "unavailable. Cannot memory map device.\n",
342                        ahc_get_pci_bus(ahc->dev_softc),
343                        ahc_get_pci_slot(ahc->dev_softc),
344                        ahc_get_pci_function(ahc->dev_softc),
345                        base);
346         }
347
348         /*
349          * We always prefer memory mapped access.
350          */
351         if (maddr == NULL) {
352
353                 error = ahc_linux_pci_reserve_io_region(ahc, &base);
354                 if (error == 0) {
355                         ahc->tag = BUS_SPACE_PIO;
356                         ahc->bsh.ioport = base;
357                         command |= PCIM_CMD_PORTEN;
358                 } else {
359                         printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
360                                "unavailable. Cannot map device.\n",
361                                ahc_get_pci_bus(ahc->dev_softc),
362                                ahc_get_pci_slot(ahc->dev_softc),
363                                ahc_get_pci_function(ahc->dev_softc),
364                                base);
365                 }
366         }
367         ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
368         return (error);
369 }
370
371 int
372 ahc_pci_map_int(struct ahc_softc *ahc)
373 {
374         int error;
375
376         error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
377                             SA_SHIRQ, "aic7xxx", ahc);
378         if (error == 0)
379                 ahc->platform_data->irq = ahc->dev_softc->irq;
380         
381         return (-error);
382 }
383