summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/ebus.c
blob: 1754192c69d0db7df3ad4ebdde7bb94e4e77c4a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
/* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $
 * ebus.c: PCI to EBus bridge device.
 *
 * Copyright (C) 1997  Eddie C. Dost  (ecd@skynet.be)
 *
 * Adopted for sparc by V. Roganov and G. Raiko.
 * Fixes for different platforms by Pete Zaitcev.
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/string.h>

#include <asm/system.h>
#include <asm/page.h>
#include <asm/pbm.h>
#include <asm/ebus.h>
#include <asm/io.h>
#include <asm/oplib.h>
#include <asm/bpp.h>

struct linux_ebus *ebus_chain = 0;

/* We are together with pcic.c under CONFIG_PCI. */
extern unsigned int pcic_pin_to_irq(unsigned int, char *name);

/*
 * IRQ Blacklist
 * Here we list PROMs and systems that are known to supply crap as IRQ numbers.
 */
struct ebus_device_irq {
	char *name;
	unsigned int pin;
};

struct ebus_system_entry {
	char *esname;
	struct ebus_device_irq *ipt;
};

static struct ebus_device_irq je1_1[] = {
	{ "8042",		 3 },
	{ "SUNW,CS4231",	 0 },
	{ "parallel",		 0 },
	{ "se",			 2 },
	{ 0, 0 }
};

/*
 * Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32).
 * Blacklist the sucker... Note that Gleb's system will work.
 */
static struct ebus_system_entry ebus_blacklist[] = {
	{ "SUNW,JavaEngine1", je1_1 },
	{ 0, 0 }
};

static struct ebus_device_irq *ebus_blackp = NULL;

/*
 */
static inline unsigned long ebus_alloc(size_t size)
{
	return (unsigned long)kmalloc(size, GFP_ATOMIC);
}

/*
 */
int __init ebus_blacklist_irq(char *name)
{
	struct ebus_device_irq *dp;

	if ((dp = ebus_blackp) != NULL) {
		for (; dp->name != NULL; dp++) {
			if (strcmp(name, dp->name) == 0) {
				return pcic_pin_to_irq(dp->pin, name);
			}
		}
	}
	return 0;
}

void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
				struct linux_ebus_child *dev)
{
	int regs[PROMREG_MAX];
	int irqs[PROMREG_MAX];
	char lbuf[128];
	int i, len;

	dev->prom_node = node;
	prom_getstring(node, "name", lbuf, sizeof(lbuf));
	strcpy(dev->prom_name, lbuf);

	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
	if (len == -1) len = 0;
	dev->num_addrs = len / sizeof(regs[0]);

	for (i = 0; i < dev->num_addrs; i++) {
		if (regs[i] >= dev->parent->num_addrs) {
			prom_printf("UGH: property for %s was %d, need < %d\n",
				    dev->prom_name, len, dev->parent->num_addrs);
			panic(__FUNCTION__);
		}
		dev->resource[i].start = dev->parent->resource[regs[i]].start; /* XXX resource */
	}

	for (i = 0; i < PROMINTR_MAX; i++)
		dev->irqs[i] = PCI_IRQ_NONE;

	if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
		dev->num_irqs = 1;
	} else if ((len = prom_getproperty(node, "interrupts",
	    (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
		dev->num_irqs = 0;
		dev->irqs[0] = 0;
		if (dev->parent->num_irqs != 0) {
			dev->num_irqs = 1;
			dev->irqs[0] = dev->parent->irqs[0];
/* P3 */ /* printk("EBUS: dev %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
		}
	} else {
		dev->num_irqs = len / sizeof(irqs[0]);
		if (irqs[0] == 0 || irqs[0] >= 8) {
			/*
			 * XXX Zero is a valid pin number...
			 * This works as long as Ebus is not wired to INTA#.
			 */
			printk("EBUS: %s got bad irq %d from PROM\n",
			    dev->prom_name, irqs[0]);
			dev->num_irqs = 0;
			dev->irqs[0] = 0;
		} else {
			dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
		}
	}
}

void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
{
	struct linux_prom_registers regs[PROMREG_MAX];
	struct linux_ebus_child *child;
	int irqs[PROMINTR_MAX];
	char lbuf[128];
	int i, n, len;
	unsigned long baseaddr;

	dev->prom_node = node;
	prom_getstring(node, "name", lbuf, sizeof(lbuf));
	strcpy(dev->prom_name, lbuf);

	len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
	if (len % sizeof(struct linux_prom_registers)) {
		prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
			    dev->prom_name, len,
			    (int)sizeof(struct linux_prom_registers));
		panic(__FUNCTION__);
	}
	dev->num_addrs = len / sizeof(struct linux_prom_registers);

	for (i = 0; i < dev->num_addrs; i++) {
		/*
		 * XXX Collect JE-1 PROM
		 * 
		 * Example - JS-E with 3.11:
		 *  /ebus
		 *      regs 
		 *        0x00000000, 0x0, 0x00000000, 0x0, 0x00000000,
		 *        0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000,
		 *        0x82000014, 0x0, 0x38800000, 0x0, 0x00800000,
		 *      ranges
		 *        0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000,
		 *        0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000,
		 *  /ebus/8042
		 *      regs
		 *        0x00000001, 0x00300060, 0x00000008,
		 *        0x00000001, 0x00300060, 0x00000008,
		 */
		n = regs[i].which_io;
		if (n >= 4) {
			/* XXX This is copied from old JE-1 by Gleb. */
			n = (regs[i].which_io - 0x10) >> 2;
		} else {
			;
		}

/*
 * XXX Now as we have regions, why don't we make an on-demand allocation...
 */
		dev->resource[i].start = 0;
		if ((baseaddr = dev->bus->self->resource[n].start +
		    regs[i].phys_addr) != 0) {
			/* dev->resource[i].name = dev->prom_name; */
			if ((baseaddr = (unsigned long) ioremap(baseaddr,
			    regs[i].reg_size)) == 0) {
				panic("ebus: unable to remap dev %s",
				    dev->prom_name);
			}
		}
		dev->resource[i].start = baseaddr;	/* XXX Unaligned */
	}

	for (i = 0; i < PROMINTR_MAX; i++)
		dev->irqs[i] = PCI_IRQ_NONE;

	if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
		dev->num_irqs = 1;
	} else if ((len = prom_getproperty(node, "interrupts",
	    (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
		dev->num_irqs = 0;
		if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
			 dev->num_irqs = 1;
/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
		}
	} else {
		dev->num_irqs = 1;  /* dev->num_irqs = len / sizeof(irqs[0]); */
		if (irqs[0] == 0 || irqs[0] >= 8) {
			/* See above for the parent. XXX */
			printk("EBUS: %s got bad irq %d from PROM\n",
			    dev->prom_name, irqs[0]);
			dev->num_irqs = 0;
			dev->irqs[0] = 0;
		} else {
			dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
		}
	}

	if ((node = prom_getchild(node))) {
		dev->children = (struct linux_ebus_child *)
			ebus_alloc(sizeof(struct linux_ebus_child));

		child = dev->children;
		child->next = 0;
		child->parent = dev;
		child->bus = dev->bus;
		fill_ebus_child(node, &regs[0], child);

		while ((node = prom_getsibling(node)) != 0) {
			child->next = (struct linux_ebus_child *)
				ebus_alloc(sizeof(struct linux_ebus_child));

			child = child->next;
			child->next = 0;
			child->parent = dev;
			child->bus = dev->bus;
			fill_ebus_child(node, &regs[0], child);
		}
	}
}

void __init ebus_init(void)
{
	struct linux_prom_pci_registers regs[PROMREG_MAX];
	struct linux_pbm_info *pbm;
	struct linux_ebus_device *dev;
	struct linux_ebus *ebus;
	struct ebus_system_entry *sp;
	struct pci_dev *pdev;
	struct pcidev_cookie *cookie;
	char lbuf[128];
	unsigned long addr, *base;
	unsigned short pci_command;
	int nd, len, ebusnd;
	int reg, nreg;
	int num_ebus = 0;

	prom_getstring(prom_root_node, "name", lbuf, sizeof(lbuf));
	for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
		if (strcmp(lbuf, sp->esname) == 0) {
			ebus_blackp = sp->ipt;
			break;
		}
	}

	pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0);
	if (!pdev) {
		return;
	}
	cookie = pdev->sysdata;
	ebusnd = cookie->prom_node;

	ebus_chain = ebus = (struct linux_ebus *)
			ebus_alloc(sizeof(struct linux_ebus));
	ebus->next = 0;

	while (ebusnd) {

		prom_getstring(ebusnd, "name", lbuf, sizeof(lbuf));
		ebus->prom_node = ebusnd;
		strcpy(ebus->prom_name, lbuf);
		ebus->self = pdev;
		ebus->parent = pbm = cookie->pbm;

		/* Enable BUS Master. */
		pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
		pci_command |= PCI_COMMAND_MASTER;
		pci_write_config_word(pdev, PCI_COMMAND, pci_command);

		len = prom_getproperty(ebusnd, "reg", (void *)regs,
				       sizeof(regs));
		if (len == 0 || len == -1) {
			prom_printf("%s: can't find reg property\n",
				    __FUNCTION__);
			prom_halt();
		}
		nreg = len / sizeof(struct linux_prom_pci_registers);

		base = &ebus->self->resource[0].start;
		for (reg = 0; reg < nreg; reg++) {
			if (!(regs[reg].which_io & 0x03000000))
				continue;

			addr = regs[reg].phys_lo;
			*base++ = addr;
		}

		nd = prom_getchild(ebusnd);
		if (!nd)
			goto next_ebus;

		ebus->devices = (struct linux_ebus_device *)
				ebus_alloc(sizeof(struct linux_ebus_device));

		dev = ebus->devices;
		dev->next = 0;
		dev->children = 0;
		dev->bus = ebus;
		fill_ebus_device(nd, dev);

		while ((nd = prom_getsibling(nd)) != 0) {
			dev->next = (struct linux_ebus_device *)
				ebus_alloc(sizeof(struct linux_ebus_device));

			dev = dev->next;
			dev->next = 0;
			dev->children = 0;
			dev->bus = ebus;
			fill_ebus_device(nd, dev);
		}

	next_ebus:
		pdev = pci_get_device(PCI_VENDOR_ID_SUN,
				       PCI_DEVICE_ID_SUN_EBUS, pdev);
		if (!pdev)
			break;

		cookie = pdev->sysdata;
		ebusnd = cookie->prom_node;

		ebus->next = (struct linux_ebus *)
			ebus_alloc(sizeof(struct linux_ebus));
		ebus = ebus->next;
		ebus->next = 0;
		++num_ebus;
	}
	if (pdev)
		pci_dev_put(pdev);
}