Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  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
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
/*
 * Broadcom specific AMBA
 * Bus scanning
 *
 * Licensed under the GNU/GPL. See COPYING for details.
 */

#include "scan.h"
#include "bcma_private.h"

#include <linux/bcma/bcma.h>
#include <linux/bcma/bcma_regs.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>

struct bcma_device_id_name {
	u16 id;
	const char *name;
};

static const struct bcma_device_id_name bcma_arm_device_names[] = {
	{ BCMA_CORE_4706_MAC_GBIT_COMMON, "BCM4706 GBit MAC Common" },
	{ BCMA_CORE_ARM_1176, "ARM 1176" },
	{ BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
	{ BCMA_CORE_ARM_CM3, "ARM CM3" },
};

static const struct bcma_device_id_name bcma_bcm_device_names[] = {
	{ BCMA_CORE_OOB_ROUTER, "OOB Router" },
	{ BCMA_CORE_4706_CHIPCOMMON, "BCM4706 ChipCommon" },
	{ BCMA_CORE_4706_SOC_RAM, "BCM4706 SOC RAM" },
	{ BCMA_CORE_4706_MAC_GBIT, "BCM4706 GBit MAC" },
	{ BCMA_CORE_NS_PCIEG2, "PCIe Gen 2" },
	{ BCMA_CORE_NS_DMA, "DMA" },
	{ BCMA_CORE_NS_SDIO3, "SDIO3" },
	{ BCMA_CORE_NS_USB20, "USB 2.0" },
	{ BCMA_CORE_NS_USB30, "USB 3.0" },
	{ BCMA_CORE_NS_A9JTAG, "ARM Cortex A9 JTAG" },
	{ BCMA_CORE_NS_DDR23, "Denali DDR2/DDR3 memory controller" },
	{ BCMA_CORE_NS_ROM, "ROM" },
	{ BCMA_CORE_NS_NAND, "NAND flash controller" },
	{ BCMA_CORE_NS_QSPI, "SPI flash controller" },
	{ BCMA_CORE_NS_CHIPCOMMON_B, "Chipcommon B" },
	{ BCMA_CORE_ARMCA9, "ARM Cortex A9 core (ihost)" },
	{ BCMA_CORE_AMEMC, "AMEMC (DDR)" },
	{ BCMA_CORE_ALTA, "ALTA (I2S)" },
	{ BCMA_CORE_INVALID, "Invalid" },
	{ BCMA_CORE_CHIPCOMMON, "ChipCommon" },
	{ BCMA_CORE_ILINE20, "ILine 20" },
	{ BCMA_CORE_SRAM, "SRAM" },
	{ BCMA_CORE_SDRAM, "SDRAM" },
	{ BCMA_CORE_PCI, "PCI" },
	{ BCMA_CORE_ETHERNET, "Fast Ethernet" },
	{ BCMA_CORE_V90, "V90" },
	{ BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
	{ BCMA_CORE_ADSL, "ADSL" },
	{ BCMA_CORE_ILINE100, "ILine 100" },
	{ BCMA_CORE_IPSEC, "IPSEC" },
	{ BCMA_CORE_UTOPIA, "UTOPIA" },
	{ BCMA_CORE_PCMCIA, "PCMCIA" },
	{ BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
	{ BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
	{ BCMA_CORE_OFDM, "OFDM" },
	{ BCMA_CORE_EXTIF, "EXTIF" },
	{ BCMA_CORE_80211, "IEEE 802.11" },
	{ BCMA_CORE_PHY_A, "PHY A" },
	{ BCMA_CORE_PHY_B, "PHY B" },
	{ BCMA_CORE_PHY_G, "PHY G" },
	{ BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
	{ BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
	{ BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
	{ BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
	{ BCMA_CORE_SDIO_HOST, "SDIO Host" },
	{ BCMA_CORE_ROBOSWITCH, "Roboswitch" },
	{ BCMA_CORE_PARA_ATA, "PATA" },
	{ BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
	{ BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
	{ BCMA_CORE_PCIE, "PCIe" },
	{ BCMA_CORE_PHY_N, "PHY N" },
	{ BCMA_CORE_SRAM_CTL, "SRAM Controller" },
	{ BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
	{ BCMA_CORE_PHY_LP, "PHY LP" },
	{ BCMA_CORE_PMU, "PMU" },
	{ BCMA_CORE_PHY_SSN, "PHY SSN" },
	{ BCMA_CORE_SDIO_DEV, "SDIO Device" },
	{ BCMA_CORE_PHY_HT, "PHY HT" },
	{ BCMA_CORE_MAC_GBIT, "GBit MAC" },
	{ BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
	{ BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
	{ BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
	{ BCMA_CORE_SHARED_COMMON, "Common Shared" },
	{ BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
	{ BCMA_CORE_SPI_HOST, "SPI Host" },
	{ BCMA_CORE_I2S, "I2S" },
	{ BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
	{ BCMA_CORE_SHIM, "SHIM" },
	{ BCMA_CORE_PCIE2, "PCIe Gen2" },
	{ BCMA_CORE_ARM_CR4, "ARM CR4" },
	{ BCMA_CORE_GCI, "GCI" },
	{ BCMA_CORE_CMEM, "CNDS DDR2/3 memory controller" },
	{ BCMA_CORE_ARM_CA7, "ARM CA7" },
	{ BCMA_CORE_DEFAULT, "Default" },
};

static const struct bcma_device_id_name bcma_mips_device_names[] = {
	{ BCMA_CORE_MIPS, "MIPS" },
	{ BCMA_CORE_MIPS_3302, "MIPS 3302" },
	{ BCMA_CORE_MIPS_74K, "MIPS 74K" },
};

static const char *bcma_device_name(const struct bcma_device_id *id)
{
	const struct bcma_device_id_name *names;
	int size, i;

	/* search manufacturer specific names */
	switch (id->manuf) {
	case BCMA_MANUF_ARM:
		names = bcma_arm_device_names;
		size = ARRAY_SIZE(bcma_arm_device_names);
		break;
	case BCMA_MANUF_BCM:
		names = bcma_bcm_device_names;
		size = ARRAY_SIZE(bcma_bcm_device_names);
		break;
	case BCMA_MANUF_MIPS:
		names = bcma_mips_device_names;
		size = ARRAY_SIZE(bcma_mips_device_names);
		break;
	default:
		return "UNKNOWN";
	}

	for (i = 0; i < size; i++) {
		if (names[i].id == id->id)
			return names[i].name;
	}

	return "UNKNOWN";
}

static u32 bcma_scan_read32(struct bcma_bus *bus, u16 offset)
{
	return readl(bus->mmio + offset);
}

static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
{
	if (bus->hosttype == BCMA_HOSTTYPE_PCI)
		pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
				       addr);
}

static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent = readl(*eromptr);
	(*eromptr)++;
	return ent;
}

static void bcma_erom_push_ent(u32 __iomem **eromptr)
{
	(*eromptr)--;
}

static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if (!(ent & SCAN_ER_VALID))
		return -ENOENT;
	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
		return -ENOENT;
	return ent;
}

static bool bcma_erom_is_end(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	bcma_erom_push_ent(eromptr);
	return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
}

static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	bcma_erom_push_ent(eromptr);
	return (((ent & SCAN_ER_VALID)) &&
		((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
		((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
}

static void bcma_erom_skip_component(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent;
	while (1) {
		ent = bcma_erom_get_ent(bus, eromptr);
		if ((ent & SCAN_ER_VALID) &&
		    ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
			break;
		if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
			break;
	}
	bcma_erom_push_ent(eromptr);
}

static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 __iomem **eromptr)
{
	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if (!(ent & SCAN_ER_VALID))
		return -ENOENT;
	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
		return -ENOENT;
	return ent;
}

static u32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 __iomem **eromptr,
				  u32 type, u8 port)
{
	u32 addrl;
	u32 size;

	u32 ent = bcma_erom_get_ent(bus, eromptr);
	if ((!(ent & SCAN_ER_VALID)) ||
	    ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
	    ((ent & SCAN_ADDR_TYPE) != type) ||
	    (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
		bcma_erom_push_ent(eromptr);
		return (u32)-EINVAL;
	}

	addrl = ent & SCAN_ADDR_ADDR;
	if (ent & SCAN_ADDR_AG32)
		bcma_erom_get_ent(bus, eromptr);

	if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
		size = bcma_erom_get_ent(bus, eromptr);
		if (size & SCAN_SIZE_SG32)
			bcma_erom_get_ent(bus, eromptr);
	}

	return addrl;
}

static struct bcma_device *bcma_find_core_by_index(struct bcma_bus *bus,
						   u16 index)
{
	struct bcma_device *core;

	list_for_each_entry(core, &bus->cores, list) {
		if (core->core_index == index)
			return core;
	}
	return NULL;
}

static struct bcma_device *bcma_find_core_reverse(struct bcma_bus *bus, u16 coreid)
{
	struct bcma_device *core;

	list_for_each_entry_reverse(core, &bus->cores, list) {
		if (core->id.id == coreid)
			return core;
	}
	return NULL;
}

#define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)

static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
			      struct bcma_device_id *match, int core_num,
			      struct bcma_device *core)
{
	u32 tmp;
	u8 i, j, k;
	s32 cia, cib;
	u8 ports[2], wrappers[2];

	/* get CIs */
	cia = bcma_erom_get_ci(bus, eromptr);
	if (cia < 0) {
		bcma_erom_push_ent(eromptr);
		if (bcma_erom_is_end(bus, eromptr))
			return -ESPIPE;
		return -EILSEQ;
	}
	cib = bcma_erom_get_ci(bus, eromptr);
	if (cib < 0)
		return -EILSEQ;

	/* parse CIs */
	core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
	core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
	core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
	ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
	ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
	wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
	wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
	core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;

	if (((core->id.manuf == BCMA_MANUF_ARM) &&
	     (core->id.id == 0xFFF)) ||
	    (ports[1] == 0)) {
		bcma_erom_skip_component(bus, eromptr);
		return -ENXIO;
	}

	/* check if component is a core at all */
	if (wrappers[0] + wrappers[1] == 0) {
		/* Some specific cores don't need wrappers */
		switch (core->id.id) {
		case BCMA_CORE_4706_MAC_GBIT_COMMON:
		case BCMA_CORE_NS_CHIPCOMMON_B:
		case BCMA_CORE_PMU:
		case BCMA_CORE_GCI:
		/* Not used yet: case BCMA_CORE_OOB_ROUTER: */
			break;
		default:
			bcma_erom_skip_component(bus, eromptr);
			return -ENXIO;
		}
	}

	if (bcma_erom_is_bridge(bus, eromptr)) {
		bcma_erom_skip_component(bus, eromptr);
		return -ENXIO;
	}

	if (bcma_find_core_by_index(bus, core_num)) {
		bcma_erom_skip_component(bus, eromptr);
		return -ENODEV;
	}

	if (match && ((match->manuf != BCMA_ANY_MANUF &&
	      match->manuf != core->id.manuf) ||
	     (match->id != BCMA_ANY_ID && match->id != core->id.id) ||
	     (match->rev != BCMA_ANY_REV && match->rev != core->id.rev) ||
	     (match->class != BCMA_ANY_CLASS && match->class != core->id.class)
	    )) {
		bcma_erom_skip_component(bus, eromptr);
		return -ENODEV;
	}

	/* get & parse master ports */
	for (i = 0; i < ports[0]; i++) {
		s32 mst_port_d = bcma_erom_get_mst_port(bus, eromptr);
		if (mst_port_d < 0)
			return -EILSEQ;
	}

	/* First Slave Address Descriptor should be port 0:
	 * the main register space for the core
	 */
	tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
	if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
		/* Try again to see if it is a bridge */
		tmp = bcma_erom_get_addr_desc(bus, eromptr,
					      SCAN_ADDR_TYPE_BRIDGE, 0);
		if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
			return -EILSEQ;
		} else {
			bcma_info(bus, "Bridge found\n");
			return -ENXIO;
		}
	}
	core->addr = tmp;

	/* get & parse slave ports */
	k = 0;
	for (i = 0; i < ports[1]; i++) {
		for (j = 0; ; j++) {
			tmp = bcma_erom_get_addr_desc(bus, eromptr,
				SCAN_ADDR_TYPE_SLAVE, i);
			if (IS_ERR_VALUE_U32(tmp)) {
				/* no more entries for port _i_ */
				/* pr_debug("erom: slave port %d "
				 * "has %d descriptors\n", i, j); */
				break;
			} else if (k < ARRAY_SIZE(core->addr_s)) {
				core->addr_s[k] = tmp;
				k++;
			}
		}
	}

	/* get & parse master wrappers */
	for (i = 0; i < wrappers[0]; i++) {
		for (j = 0; ; j++) {
			tmp = bcma_erom_get_addr_desc(bus, eromptr,
				SCAN_ADDR_TYPE_MWRAP, i);
			if (IS_ERR_VALUE_U32(tmp)) {
				/* no more entries for port _i_ */
				/* pr_debug("erom: master wrapper %d "
				 * "has %d descriptors\n", i, j); */
				break;
			} else {
				if (i == 0 && j == 0)
					core->wrap = tmp;
			}
		}
	}

	/* get & parse slave wrappers */
	for (i = 0; i < wrappers[1]; i++) {
		u8 hack = (ports[1] == 1) ? 0 : 1;
		for (j = 0; ; j++) {
			tmp = bcma_erom_get_addr_desc(bus, eromptr,
				SCAN_ADDR_TYPE_SWRAP, i + hack);
			if (IS_ERR_VALUE_U32(tmp)) {
				/* no more entries for port _i_ */
				/* pr_debug("erom: master wrapper %d "
				 * has %d descriptors\n", i, j); */
				break;
			} else {
				if (wrappers[0] == 0 && !i && !j)
					core->wrap = tmp;
			}
		}
	}
	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
		core->io_addr = ioremap(core->addr, BCMA_CORE_SIZE);
		if (!core->io_addr)
			return -ENOMEM;
		if (core->wrap) {
			core->io_wrap = ioremap(core->wrap,
							BCMA_CORE_SIZE);
			if (!core->io_wrap) {
				iounmap(core->io_addr);
				return -ENOMEM;
			}
		}
	}
	return 0;
}

void bcma_detect_chip(struct bcma_bus *bus)
{
	s32 tmp;
	struct bcma_chipinfo *chipinfo = &(bus->chipinfo);
	char chip_id[8];

	bcma_scan_switch_core(bus, BCMA_ADDR_BASE);

	tmp = bcma_scan_read32(bus, BCMA_CC_ID);
	chipinfo->id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
	chipinfo->rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
	chipinfo->pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;

	snprintf(chip_id, ARRAY_SIZE(chip_id),
		 (chipinfo->id > 0x9999) ? "%d" : "0x%04X", chipinfo->id);
	bcma_info(bus, "Found chip with id %s, rev 0x%02X and package 0x%02X\n",
		  chip_id, chipinfo->rev, chipinfo->pkg);
}

int bcma_bus_scan(struct bcma_bus *bus)
{
	u32 erombase;
	u32 __iomem *eromptr, *eromend;

	int err, core_num = 0;

	/* Skip if bus was already scanned (e.g. during early register) */
	if (bus->nr_cores)
		return 0;

	erombase = bcma_scan_read32(bus, BCMA_CC_EROM);
	if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
		eromptr = ioremap(erombase, BCMA_CORE_SIZE);
		if (!eromptr)
			return -ENOMEM;
	} else {
		eromptr = bus->mmio;
	}

	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);

	bcma_scan_switch_core(bus, erombase);

	while (eromptr < eromend) {
		struct bcma_device *other_core;
		struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
		if (!core) {
			err = -ENOMEM;
			goto out;
		}
		INIT_LIST_HEAD(&core->list);
		core->bus = bus;

		err = bcma_get_next_core(bus, &eromptr, NULL, core_num, core);
		if (err < 0) {
			kfree(core);
			if (err == -ENODEV) {
				core_num++;
				continue;
			} else if (err == -ENXIO) {
				continue;
			} else if (err == -ESPIPE) {
				break;
			}
			goto out;
		}

		core->core_index = core_num++;
		bus->nr_cores++;
		other_core = bcma_find_core_reverse(bus, core->id.id);
		core->core_unit = (other_core == NULL) ? 0 : other_core->core_unit + 1;
		bcma_prepare_core(bus, core);

		bcma_info(bus, "Core %d found: %s (manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
			  core->core_index, bcma_device_name(&core->id),
			  core->id.manuf, core->id.id, core->id.rev,
			  core->id.class);

		list_add_tail(&core->list, &bus->cores);
	}

	err = 0;
out:
	if (bus->hosttype == BCMA_HOSTTYPE_SOC)
		iounmap(eromptr);

	return err;
}