Remove obsolete #include <linux/config.h>
[linux-3.10.git] / arch / sparc / kernel / ebus.c
1 /* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $
2  * ebus.c: PCI to EBus bridge device.
3  *
4  * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
5  *
6  * Adopted for sparc by V. Roganov and G. Raiko.
7  * Fixes for different platforms by Pete Zaitcev.
8  */
9
10 #include <linux/kernel.h>
11 #include <linux/types.h>
12 #include <linux/init.h>
13 #include <linux/slab.h>
14 #include <linux/string.h>
15
16 #include <asm/system.h>
17 #include <asm/page.h>
18 #include <asm/pbm.h>
19 #include <asm/ebus.h>
20 #include <asm/io.h>
21 #include <asm/oplib.h>
22 #include <asm/prom.h>
23 #include <asm/bpp.h>
24
25 struct linux_ebus *ebus_chain = NULL;
26
27 /* We are together with pcic.c under CONFIG_PCI. */
28 extern unsigned int pcic_pin_to_irq(unsigned int, char *name);
29
30 /*
31  * IRQ Blacklist
32  * Here we list PROMs and systems that are known to supply crap as IRQ numbers.
33  */
34 struct ebus_device_irq {
35         char *name;
36         unsigned int pin;
37 };
38
39 struct ebus_system_entry {
40         char *esname;
41         struct ebus_device_irq *ipt;
42 };
43
44 static struct ebus_device_irq je1_1[] = {
45         { "8042",                3 },
46         { "SUNW,CS4231",         0 },
47         { "parallel",            0 },
48         { "se",                  2 },
49         { NULL, 0 }
50 };
51
52 /*
53  * Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32).
54  * Blacklist the sucker... Note that Gleb's system will work.
55  */
56 static struct ebus_system_entry ebus_blacklist[] = {
57         { "SUNW,JavaEngine1", je1_1 },
58         { NULL, NULL }
59 };
60
61 static struct ebus_device_irq *ebus_blackp = NULL;
62
63 /*
64  */
65 static inline unsigned long ebus_alloc(size_t size)
66 {
67         return (unsigned long)kmalloc(size, GFP_ATOMIC);
68 }
69
70 /*
71  */
72 int __init ebus_blacklist_irq(char *name)
73 {
74         struct ebus_device_irq *dp;
75
76         if ((dp = ebus_blackp) != NULL) {
77                 for (; dp->name != NULL; dp++) {
78                         if (strcmp(name, dp->name) == 0) {
79                                 return pcic_pin_to_irq(dp->pin, name);
80                         }
81                 }
82         }
83         return 0;
84 }
85
86 void __init fill_ebus_child(struct device_node *dp,
87                             struct linux_ebus_child *dev)
88 {
89         int *regs;
90         int *irqs;
91         int i, len;
92
93         dev->prom_node = dp;
94         regs = of_get_property(dp, "reg", &len);
95         if (!regs)
96                 len = 0;
97         dev->num_addrs = len / sizeof(regs[0]);
98
99         for (i = 0; i < dev->num_addrs; i++) {
100                 if (regs[i] >= dev->parent->num_addrs) {
101                         prom_printf("UGH: property for %s was %d, need < %d\n",
102                                     dev->prom_node->name, len,
103                                     dev->parent->num_addrs);
104                         panic(__FUNCTION__);
105                 }
106
107                 /* XXX resource */
108                 dev->resource[i].start =
109                         dev->parent->resource[regs[i]].start;
110         }
111
112         for (i = 0; i < PROMINTR_MAX; i++)
113                 dev->irqs[i] = PCI_IRQ_NONE;
114
115         if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
116                 dev->num_irqs = 1;
117         } else {
118                 irqs = of_get_property(dp, "interrupts", &len);
119                 if (!irqs) {
120                         dev->num_irqs = 0;
121                         dev->irqs[0] = 0;
122                         if (dev->parent->num_irqs != 0) {
123                                 dev->num_irqs = 1;
124                                 dev->irqs[0] = dev->parent->irqs[0];
125                         }
126                 } else {
127                         dev->num_irqs = len / sizeof(irqs[0]);
128                         if (irqs[0] == 0 || irqs[0] >= 8) {
129                                 /*
130                                  * XXX Zero is a valid pin number...
131                                  * This works as long as Ebus is not wired
132                                  * to INTA#.
133                                  */
134                                 printk("EBUS: %s got bad irq %d from PROM\n",
135                                        dev->prom_node->name, irqs[0]);
136                                 dev->num_irqs = 0;
137                                 dev->irqs[0] = 0;
138                         } else {
139                                 dev->irqs[0] =
140                                         pcic_pin_to_irq(irqs[0],
141                                                         dev->prom_node->name);
142                         }
143                 }
144         }
145 }
146
147 void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
148 {
149         struct linux_prom_registers *regs;
150         struct linux_ebus_child *child;
151         int *irqs;
152         int i, n, len;
153         unsigned long baseaddr;
154
155         dev->prom_node = dp;
156
157         regs = of_get_property(dp, "reg", &len);
158         if (len % sizeof(struct linux_prom_registers)) {
159                 prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
160                             dev->prom_node->name, len,
161                             (int)sizeof(struct linux_prom_registers));
162                 panic(__FUNCTION__);
163         }
164         dev->num_addrs = len / sizeof(struct linux_prom_registers);
165
166         for (i = 0; i < dev->num_addrs; i++) {
167                 /*
168                  * XXX Collect JE-1 PROM
169                  * 
170                  * Example - JS-E with 3.11:
171                  *  /ebus
172                  *      regs 
173                  *        0x00000000, 0x0, 0x00000000, 0x0, 0x00000000,
174                  *        0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000,
175                  *        0x82000014, 0x0, 0x38800000, 0x0, 0x00800000,
176                  *      ranges
177                  *        0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000,
178                  *        0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000,
179                  *  /ebus/8042
180                  *      regs
181                  *        0x00000001, 0x00300060, 0x00000008,
182                  *        0x00000001, 0x00300060, 0x00000008,
183                  */
184                 n = regs[i].which_io;
185                 if (n >= 4) {
186                         /* XXX This is copied from old JE-1 by Gleb. */
187                         n = (regs[i].which_io - 0x10) >> 2;
188                 } else {
189                         ;
190                 }
191
192 /*
193  * XXX Now as we have regions, why don't we make an on-demand allocation...
194  */
195                 dev->resource[i].start = 0;
196                 if ((baseaddr = dev->bus->self->resource[n].start +
197                     regs[i].phys_addr) != 0) {
198                         /* dev->resource[i].name = dev->prom_name; */
199                         if ((baseaddr = (unsigned long) ioremap(baseaddr,
200                             regs[i].reg_size)) == 0) {
201                                 panic("ebus: unable to remap dev %s",
202                                       dev->prom_node->name);
203                         }
204                 }
205                 dev->resource[i].start = baseaddr;      /* XXX Unaligned */
206         }
207
208         for (i = 0; i < PROMINTR_MAX; i++)
209                 dev->irqs[i] = PCI_IRQ_NONE;
210
211         if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
212                 dev->num_irqs = 1;
213         } else {
214                 irqs = of_get_property(dp, "interrupts", &len);
215                 if (!irqs) {
216                         dev->num_irqs = 0;
217                         if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
218                                 dev->num_irqs = 1;
219 /* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
220                         }
221                 } else {
222                         dev->num_irqs = 1;  /* dev->num_irqs = len / sizeof(irqs[0]); */
223                         if (irqs[0] == 0 || irqs[0] >= 8) {
224                                 /* See above for the parent. XXX */
225                                 printk("EBUS: %s got bad irq %d from PROM\n",
226                                        dev->prom_node->name, irqs[0]);
227                                 dev->num_irqs = 0;
228                                 dev->irqs[0] = 0;
229                         } else {
230                                 dev->irqs[0] =
231                                         pcic_pin_to_irq(irqs[0],
232                                                         dev->prom_node->name);
233                         }
234                 }
235         }
236
237         dev->ofdev.node = dp;
238         dev->ofdev.dev.parent = &dev->bus->ofdev.dev;
239         dev->ofdev.dev.bus = &ebus_bus_type;
240         strcpy(dev->ofdev.dev.bus_id, dp->path_component_name);
241
242         /* Register with core */
243         if (of_device_register(&dev->ofdev) != 0)
244                 printk(KERN_DEBUG "ebus: device registration error for %s!\n",
245                        dev->ofdev.dev.bus_id);
246
247         if ((dp = dp->child) != NULL) {
248                 dev->children = (struct linux_ebus_child *)
249                         ebus_alloc(sizeof(struct linux_ebus_child));
250
251                 child = dev->children;
252                 child->next = NULL;
253                 child->parent = dev;
254                 child->bus = dev->bus;
255                 fill_ebus_child(dp, child);
256
257                 while ((dp = dp->sibling) != NULL) {
258                         child->next = (struct linux_ebus_child *)
259                                 ebus_alloc(sizeof(struct linux_ebus_child));
260
261                         child = child->next;
262                         child->next = NULL;
263                         child->parent = dev;
264                         child->bus = dev->bus;
265                         fill_ebus_child(dp, child);
266                 }
267         }
268 }
269
270 void __init ebus_init(void)
271 {
272         struct linux_prom_pci_registers *regs;
273         struct linux_pbm_info *pbm;
274         struct linux_ebus_device *dev;
275         struct linux_ebus *ebus;
276         struct ebus_system_entry *sp;
277         struct pci_dev *pdev;
278         struct pcidev_cookie *cookie;
279         struct device_node *dp;
280         unsigned long addr, *base;
281         unsigned short pci_command;
282         int len, reg, nreg;
283         int num_ebus = 0;
284
285         dp = of_find_node_by_path("/");
286         for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
287                 if (strcmp(dp->name, sp->esname) == 0) {
288                         ebus_blackp = sp->ipt;
289                         break;
290                 }
291         }
292
293         pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL);
294         if (!pdev)
295                 return;
296
297         cookie = pdev->sysdata;
298         dp = cookie->prom_node;
299
300         ebus_chain = ebus = (struct linux_ebus *)
301                         ebus_alloc(sizeof(struct linux_ebus));
302         ebus->next = NULL;
303
304         while (dp) {
305                 struct device_node *nd;
306
307                 ebus->prom_node = dp;
308                 ebus->self = pdev;
309                 ebus->parent = pbm = cookie->pbm;
310
311                 /* Enable BUS Master. */
312                 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
313                 pci_command |= PCI_COMMAND_MASTER;
314                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
315
316                 regs = of_get_property(dp, "reg", &len);
317                 if (!regs) {
318                         prom_printf("%s: can't find reg property\n",
319                                     __FUNCTION__);
320                         prom_halt();
321                 }
322                 nreg = len / sizeof(struct linux_prom_pci_registers);
323
324                 base = &ebus->self->resource[0].start;
325                 for (reg = 0; reg < nreg; reg++) {
326                         if (!(regs[reg].which_io & 0x03000000))
327                                 continue;
328
329                         addr = regs[reg].phys_lo;
330                         *base++ = addr;
331                 }
332
333                 ebus->ofdev.node = dp;
334                 ebus->ofdev.dev.parent = &pdev->dev;
335                 ebus->ofdev.dev.bus = &ebus_bus_type;
336                 strcpy(ebus->ofdev.dev.bus_id, dp->path_component_name);
337
338                 /* Register with core */
339                 if (of_device_register(&ebus->ofdev) != 0)
340                         printk(KERN_DEBUG "ebus: device registration error for %s!\n",
341                                ebus->ofdev.dev.bus_id);
342
343
344                 nd = dp->child;
345                 if (!nd)
346                         goto next_ebus;
347
348                 ebus->devices = (struct linux_ebus_device *)
349                                 ebus_alloc(sizeof(struct linux_ebus_device));
350
351                 dev = ebus->devices;
352                 dev->next = NULL;
353                 dev->children = NULL;
354                 dev->bus = ebus;
355                 fill_ebus_device(nd, dev);
356
357                 while ((nd = nd->sibling) != NULL) {
358                         dev->next = (struct linux_ebus_device *)
359                                 ebus_alloc(sizeof(struct linux_ebus_device));
360
361                         dev = dev->next;
362                         dev->next = NULL;
363                         dev->children = NULL;
364                         dev->bus = ebus;
365                         fill_ebus_device(nd, dev);
366                 }
367
368         next_ebus:
369                 pdev = pci_get_device(PCI_VENDOR_ID_SUN,
370                                        PCI_DEVICE_ID_SUN_EBUS, pdev);
371                 if (!pdev)
372                         break;
373
374                 cookie = pdev->sysdata;
375                 dp = cookie->prom_node;
376
377                 ebus->next = (struct linux_ebus *)
378                         ebus_alloc(sizeof(struct linux_ebus));
379                 ebus = ebus->next;
380                 ebus->next = NULL;
381                 ++num_ebus;
382         }
383         if (pdev)
384                 pci_dev_put(pdev);
385 }