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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $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
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#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>
David S. Miller942a6bd2006-06-23 15:53:31 -070022#include <asm/prom.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <asm/bpp.h>
24
Al Viroe4fe342f2005-12-04 18:48:45 -050025struct linux_ebus *ebus_chain = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27/* We are together with pcic.c under CONFIG_PCI. */
28extern 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 */
34struct ebus_device_irq {
35 char *name;
36 unsigned int pin;
37};
38
39struct ebus_system_entry {
40 char *esname;
41 struct ebus_device_irq *ipt;
42};
43
44static struct ebus_device_irq je1_1[] = {
45 { "8042", 3 },
46 { "SUNW,CS4231", 0 },
47 { "parallel", 0 },
48 { "se", 2 },
Al Viroe4fe342f2005-12-04 18:48:45 -050049 { NULL, 0 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070050};
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 */
56static struct ebus_system_entry ebus_blacklist[] = {
57 { "SUNW,JavaEngine1", je1_1 },
Al Viroe4fe342f2005-12-04 18:48:45 -050058 { NULL, NULL }
Linus Torvalds1da177e2005-04-16 15:20:36 -070059};
60
61static struct ebus_device_irq *ebus_blackp = NULL;
62
63/*
64 */
65static inline unsigned long ebus_alloc(size_t size)
66{
67 return (unsigned long)kmalloc(size, GFP_ATOMIC);
68}
69
70/*
71 */
72int __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
David S. Miller942a6bd2006-06-23 15:53:31 -070086void __init fill_ebus_child(struct device_node *dp,
87 struct linux_ebus_child *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
David S. Miller942a6bd2006-06-23 15:53:31 -070089 int *regs;
90 int *irqs;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 int i, len;
92
David S. Miller942a6bd2006-06-23 15:53:31 -070093 dev->prom_node = dp;
94 regs = of_get_property(dp, "reg", &len);
95 if (!regs)
96 len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 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",
David S. Miller942a6bd2006-06-23 15:53:31 -0700102 dev->prom_node->name, len,
103 dev->parent->num_addrs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 panic(__FUNCTION__);
105 }
David S. Miller942a6bd2006-06-23 15:53:31 -0700106
107 /* XXX resource */
108 dev->resource[i].start =
109 dev->parent->resource[regs[i]].start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 }
111
112 for (i = 0; i < PROMINTR_MAX; i++)
113 dev->irqs[i] = PCI_IRQ_NONE;
114
David S. Miller942a6bd2006-06-23 15:53:31 -0700115 if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 dev->num_irqs = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 } else {
David S. Miller942a6bd2006-06-23 15:53:31 -0700118 irqs = of_get_property(dp, "interrupts", &len);
119 if (!irqs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 dev->num_irqs = 0;
121 dev->irqs[0] = 0;
David S. Miller942a6bd2006-06-23 15:53:31 -0700122 if (dev->parent->num_irqs != 0) {
123 dev->num_irqs = 1;
124 dev->irqs[0] = dev->parent->irqs[0];
125 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 } else {
David S. Miller942a6bd2006-06-23 15:53:31 -0700127 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 }
144 }
145}
146
David S. Miller942a6bd2006-06-23 15:53:31 -0700147void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
David S. Miller942a6bd2006-06-23 15:53:31 -0700149 struct linux_prom_registers *regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 struct linux_ebus_child *child;
David S. Miller942a6bd2006-06-23 15:53:31 -0700151 int *irqs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 int i, n, len;
153 unsigned long baseaddr;
154
David S. Miller942a6bd2006-06-23 15:53:31 -0700155 dev->prom_node = dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
David S. Miller942a6bd2006-06-23 15:53:31 -0700157 regs = of_get_property(dp, "reg", &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (len % sizeof(struct linux_prom_registers)) {
159 prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
David S. Miller942a6bd2006-06-23 15:53:31 -0700160 dev->prom_node->name, len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 (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",
David S. Miller942a6bd2006-06-23 15:53:31 -0700202 dev->prom_node->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 }
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
David S. Miller942a6bd2006-06-23 15:53:31 -0700211 if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 dev->num_irqs = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 } else {
David S. Miller942a6bd2006-06-23 15:53:31 -0700214 irqs = of_get_property(dp, "interrupts", &len);
215 if (!irqs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 dev->num_irqs = 0;
David S. Miller942a6bd2006-06-23 15:53:31 -0700217 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 } else {
David S. Miller942a6bd2006-06-23 15:53:31 -0700222 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 }
235 }
236
David S. Millerfd531432006-06-23 15:55:17 -0700237 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
David S. Miller942a6bd2006-06-23 15:53:31 -0700247 if ((dp = dp->child) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 dev->children = (struct linux_ebus_child *)
249 ebus_alloc(sizeof(struct linux_ebus_child));
250
251 child = dev->children;
Al Viroe4fe342f2005-12-04 18:48:45 -0500252 child->next = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 child->parent = dev;
254 child->bus = dev->bus;
David S. Miller942a6bd2006-06-23 15:53:31 -0700255 fill_ebus_child(dp, child);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
David S. Miller942a6bd2006-06-23 15:53:31 -0700257 while ((dp = dp->sibling) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 child->next = (struct linux_ebus_child *)
259 ebus_alloc(sizeof(struct linux_ebus_child));
260
261 child = child->next;
Al Viroe4fe342f2005-12-04 18:48:45 -0500262 child->next = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 child->parent = dev;
264 child->bus = dev->bus;
David S. Miller942a6bd2006-06-23 15:53:31 -0700265 fill_ebus_child(dp, child);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 }
267 }
268}
269
270void __init ebus_init(void)
271{
David S. Miller942a6bd2006-06-23 15:53:31 -0700272 struct linux_prom_pci_registers *regs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 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;
David S. Miller942a6bd2006-06-23 15:53:31 -0700279 struct device_node *dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 unsigned long addr, *base;
281 unsigned short pci_command;
David S. Miller942a6bd2006-06-23 15:53:31 -0700282 int len, reg, nreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 int num_ebus = 0;
284
David S. Miller942a6bd2006-06-23 15:53:31 -0700285 dp = of_find_node_by_path("/");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
David S. Miller942a6bd2006-06-23 15:53:31 -0700287 if (strcmp(dp->name, sp->esname) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 ebus_blackp = sp->ipt;
289 break;
290 }
291 }
292
Al Viroe4fe342f2005-12-04 18:48:45 -0500293 pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL);
David S. Miller942a6bd2006-06-23 15:53:31 -0700294 if (!pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 return;
David S. Miller942a6bd2006-06-23 15:53:31 -0700296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 cookie = pdev->sysdata;
David S. Miller942a6bd2006-06-23 15:53:31 -0700298 dp = cookie->prom_node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 ebus_chain = ebus = (struct linux_ebus *)
301 ebus_alloc(sizeof(struct linux_ebus));
Al Viroe4fe342f2005-12-04 18:48:45 -0500302 ebus->next = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
David S. Miller942a6bd2006-06-23 15:53:31 -0700304 while (dp) {
305 struct device_node *nd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
David S. Miller942a6bd2006-06-23 15:53:31 -0700307 ebus->prom_node = dp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 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
David S. Miller942a6bd2006-06-23 15:53:31 -0700316 regs = of_get_property(dp, "reg", &len);
317 if (!regs) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 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
David S. Millerfd531432006-06-23 15:55:17 -0700333 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
David S. Miller942a6bd2006-06-23 15:53:31 -0700344 nd = dp->child;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 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;
Al Viroe4fe342f2005-12-04 18:48:45 -0500352 dev->next = NULL;
353 dev->children = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 dev->bus = ebus;
355 fill_ebus_device(nd, dev);
356
David S. Miller942a6bd2006-06-23 15:53:31 -0700357 while ((nd = nd->sibling) != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 dev->next = (struct linux_ebus_device *)
359 ebus_alloc(sizeof(struct linux_ebus_device));
360
361 dev = dev->next;
Al Viroe4fe342f2005-12-04 18:48:45 -0500362 dev->next = NULL;
363 dev->children = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 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;
David S. Miller942a6bd2006-06-23 15:53:31 -0700375 dp = cookie->prom_node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377 ebus->next = (struct linux_ebus *)
378 ebus_alloc(sizeof(struct linux_ebus));
379 ebus = ebus->next;
Al Viroe4fe342f2005-12-04 18:48:45 -0500380 ebus->next = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 ++num_ebus;
382 }
383 if (pdev)
384 pci_dev_put(pdev);
385}