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Merge tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[deliverable/linux.git] / arch / powerpc / sysdev / fsl_pci.c
1 /*
2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
3 *
4 * Copyright 2007-2012 Freescale Semiconductor, Inc.
5 * Copyright 2008-2009 MontaVista Software, Inc.
6 *
7 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
8 * Recode: ZHANG WEI <wei.zhang@freescale.com>
9 * Rewrite the routing for Frescale PCI and PCI Express
10 * Roy Zang <tie-fei.zang@freescale.com>
11 * MPC83xx PCI-Express support:
12 * Tony Li <tony.li@freescale.com>
13 * Anton Vorontsov <avorontsov@ru.mvista.com>
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 */
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/string.h>
24 #include <linux/init.h>
25 #include <linux/bootmem.h>
26 #include <linux/memblock.h>
27 #include <linux/log2.h>
28 #include <linux/slab.h>
29
30 #include <asm/io.h>
31 #include <asm/prom.h>
32 #include <asm/pci-bridge.h>
33 #include <asm/machdep.h>
34 #include <sysdev/fsl_soc.h>
35 #include <sysdev/fsl_pci.h>
36
37 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
38
39 static void __devinit quirk_fsl_pcie_header(struct pci_dev *dev)
40 {
41 u8 progif;
42
43 /* if we aren't a PCIe don't bother */
44 if (!pci_find_capability(dev, PCI_CAP_ID_EXP))
45 return;
46
47 /* if we aren't in host mode don't bother */
48 pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
49 if (progif & 0x1)
50 return;
51
52 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
53 fsl_pcie_bus_fixup = 1;
54 return;
55 }
56
57 static int __init fsl_pcie_check_link(struct pci_controller *hose)
58 {
59 u32 val;
60
61 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
62 if (val < PCIE_LTSSM_L0)
63 return 1;
64 return 0;
65 }
66
67 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
68
69 #define MAX_PHYS_ADDR_BITS 40
70 static u64 pci64_dma_offset = 1ull << MAX_PHYS_ADDR_BITS;
71
72 static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
73 {
74 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
75 return -EIO;
76
77 /*
78 * Fixup PCI devices that are able to DMA to above the physical
79 * address width of the SoC such that we can address any internal
80 * SoC address from across PCI if needed
81 */
82 if ((dev->bus == &pci_bus_type) &&
83 dma_mask >= DMA_BIT_MASK(MAX_PHYS_ADDR_BITS)) {
84 set_dma_ops(dev, &dma_direct_ops);
85 set_dma_offset(dev, pci64_dma_offset);
86 }
87
88 *dev->dma_mask = dma_mask;
89 return 0;
90 }
91
92 static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
93 unsigned int index, const struct resource *res,
94 resource_size_t offset)
95 {
96 resource_size_t pci_addr = res->start - offset;
97 resource_size_t phys_addr = res->start;
98 resource_size_t size = resource_size(res);
99 u32 flags = 0x80044000; /* enable & mem R/W */
100 unsigned int i;
101
102 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
103 (u64)res->start, (u64)size);
104
105 if (res->flags & IORESOURCE_PREFETCH)
106 flags |= 0x10000000; /* enable relaxed ordering */
107
108 for (i = 0; size > 0; i++) {
109 unsigned int bits = min(__ilog2(size),
110 __ffs(pci_addr | phys_addr));
111
112 if (index + i >= 5)
113 return -1;
114
115 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
116 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
117 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
118 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
119
120 pci_addr += (resource_size_t)1U << bits;
121 phys_addr += (resource_size_t)1U << bits;
122 size -= (resource_size_t)1U << bits;
123 }
124
125 return i;
126 }
127
128 /* atmu setup for fsl pci/pcie controller */
129 static void __init setup_pci_atmu(struct pci_controller *hose,
130 struct resource *rsrc)
131 {
132 struct ccsr_pci __iomem *pci;
133 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
134 u64 mem, sz, paddr_hi = 0;
135 u64 paddr_lo = ULLONG_MAX;
136 u32 pcicsrbar = 0, pcicsrbar_sz;
137 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
138 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
139 char *name = hose->dn->full_name;
140 const u64 *reg;
141 int len;
142
143 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
144 (u64)rsrc->start, (u64)resource_size(rsrc));
145
146 if (of_device_is_compatible(hose->dn, "fsl,qoriq-pcie-v2.2")) {
147 win_idx = 2;
148 start_idx = 0;
149 end_idx = 3;
150 }
151
152 pci = ioremap(rsrc->start, resource_size(rsrc));
153 if (!pci) {
154 dev_err(hose->parent, "Unable to map ATMU registers\n");
155 return;
156 }
157
158 /* Disable all windows (except powar0 since it's ignored) */
159 for(i = 1; i < 5; i++)
160 out_be32(&pci->pow[i].powar, 0);
161 for (i = start_idx; i < end_idx; i++)
162 out_be32(&pci->piw[i].piwar, 0);
163
164 /* Setup outbound MEM window */
165 for(i = 0, j = 1; i < 3; i++) {
166 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
167 continue;
168
169 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
170 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
171
172 n = setup_one_atmu(pci, j, &hose->mem_resources[i],
173 hose->pci_mem_offset);
174
175 if (n < 0 || j >= 5) {
176 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
177 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
178 } else
179 j += n;
180 }
181
182 /* Setup outbound IO window */
183 if (hose->io_resource.flags & IORESOURCE_IO) {
184 if (j >= 5) {
185 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
186 } else {
187 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
188 "phy base 0x%016llx.\n",
189 (u64)hose->io_resource.start,
190 (u64)resource_size(&hose->io_resource),
191 (u64)hose->io_base_phys);
192 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
193 out_be32(&pci->pow[j].potear, 0);
194 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
195 /* Enable, IO R/W */
196 out_be32(&pci->pow[j].powar, 0x80088000
197 | (__ilog2(hose->io_resource.end
198 - hose->io_resource.start + 1) - 1));
199 }
200 }
201
202 /* convert to pci address space */
203 paddr_hi -= hose->pci_mem_offset;
204 paddr_lo -= hose->pci_mem_offset;
205
206 if (paddr_hi == paddr_lo) {
207 pr_err("%s: No outbound window space\n", name);
208 goto out;
209 }
210
211 if (paddr_lo == 0) {
212 pr_err("%s: No space for inbound window\n", name);
213 goto out;
214 }
215
216 /* setup PCSRBAR/PEXCSRBAR */
217 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
218 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
219 pcicsrbar_sz = ~pcicsrbar_sz + 1;
220
221 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
222 (paddr_lo > 0x100000000ull))
223 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
224 else
225 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
226 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
227
228 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
229
230 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
231
232 /* Setup inbound mem window */
233 mem = memblock_end_of_DRAM();
234
235 /*
236 * The msi-address-64 property, if it exists, indicates the physical
237 * address of the MSIIR register. Normally, this register is located
238 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
239 * this property exists, then we normally need to create a new ATMU
240 * for it. For now, however, we cheat. The only entity that creates
241 * this property is the Freescale hypervisor, and the address is
242 * specified in the partition configuration. Typically, the address
243 * is located in the page immediately after the end of DDR. If so, we
244 * can avoid allocating a new ATMU by extending the DDR ATMU by one
245 * page.
246 */
247 reg = of_get_property(hose->dn, "msi-address-64", &len);
248 if (reg && (len == sizeof(u64))) {
249 u64 address = be64_to_cpup(reg);
250
251 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
252 pr_info("%s: extending DDR ATMU to cover MSIIR", name);
253 mem += PAGE_SIZE;
254 } else {
255 /* TODO: Create a new ATMU for MSIIR */
256 pr_warn("%s: msi-address-64 address of %llx is "
257 "unsupported\n", name, address);
258 }
259 }
260
261 sz = min(mem, paddr_lo);
262 mem_log = __ilog2_u64(sz);
263
264 /* PCIe can overmap inbound & outbound since RX & TX are separated */
265 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
266 /* Size window to exact size if power-of-two or one size up */
267 if ((1ull << mem_log) != mem) {
268 if ((1ull << mem_log) > mem)
269 pr_info("%s: Setting PCI inbound window "
270 "greater than memory size\n", name);
271 mem_log++;
272 }
273
274 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
275
276 /* Setup inbound memory window */
277 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
278 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
279 out_be32(&pci->piw[win_idx].piwar, piwar);
280 win_idx--;
281
282 hose->dma_window_base_cur = 0x00000000;
283 hose->dma_window_size = (resource_size_t)sz;
284
285 /*
286 * if we have >4G of memory setup second PCI inbound window to
287 * let devices that are 64-bit address capable to work w/o
288 * SWIOTLB and access the full range of memory
289 */
290 if (sz != mem) {
291 mem_log = __ilog2_u64(mem);
292
293 /* Size window up if we dont fit in exact power-of-2 */
294 if ((1ull << mem_log) != mem)
295 mem_log++;
296
297 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
298
299 /* Setup inbound memory window */
300 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
301 out_be32(&pci->piw[win_idx].piwbear,
302 pci64_dma_offset >> 44);
303 out_be32(&pci->piw[win_idx].piwbar,
304 pci64_dma_offset >> 12);
305 out_be32(&pci->piw[win_idx].piwar, piwar);
306
307 /*
308 * install our own dma_set_mask handler to fixup dma_ops
309 * and dma_offset
310 */
311 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
312
313 pr_info("%s: Setup 64-bit PCI DMA window\n", name);
314 }
315 } else {
316 u64 paddr = 0;
317
318 /* Setup inbound memory window */
319 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
320 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
321 out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1)));
322 win_idx--;
323
324 paddr += 1ull << mem_log;
325 sz -= 1ull << mem_log;
326
327 if (sz) {
328 mem_log = __ilog2_u64(sz);
329 piwar |= (mem_log - 1);
330
331 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
332 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
333 out_be32(&pci->piw[win_idx].piwar, piwar);
334 win_idx--;
335
336 paddr += 1ull << mem_log;
337 }
338
339 hose->dma_window_base_cur = 0x00000000;
340 hose->dma_window_size = (resource_size_t)paddr;
341 }
342
343 if (hose->dma_window_size < mem) {
344 #ifndef CONFIG_SWIOTLB
345 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
346 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
347 name);
348 #endif
349 /* adjusting outbound windows could reclaim space in mem map */
350 if (paddr_hi < 0xffffffffull)
351 pr_warning("%s: WARNING: Outbound window cfg leaves "
352 "gaps in memory map. Adjusting the memory map "
353 "could reduce unnecessary bounce buffering.\n",
354 name);
355
356 pr_info("%s: DMA window size is 0x%llx\n", name,
357 (u64)hose->dma_window_size);
358 }
359
360 out:
361 iounmap(pci);
362 }
363
364 static void __init setup_pci_cmd(struct pci_controller *hose)
365 {
366 u16 cmd;
367 int cap_x;
368
369 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
370 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
371 | PCI_COMMAND_IO;
372 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
373
374 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
375 if (cap_x) {
376 int pci_x_cmd = cap_x + PCI_X_CMD;
377 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
378 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
379 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
380 } else {
381 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
382 }
383 }
384
385 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
386 {
387 struct pci_controller *hose = pci_bus_to_host(bus);
388 int i, is_pcie = 0, no_link;
389
390 /* The root complex bridge comes up with bogus resources,
391 * we copy the PHB ones in.
392 *
393 * With the current generic PCI code, the PHB bus no longer
394 * has bus->resource[0..4] set, so things are a bit more
395 * tricky.
396 */
397
398 if (fsl_pcie_bus_fixup)
399 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
400 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
401
402 if (bus->parent == hose->bus && (is_pcie || no_link)) {
403 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
404 struct resource *res = bus->resource[i];
405 struct resource *par;
406
407 if (!res)
408 continue;
409 if (i == 0)
410 par = &hose->io_resource;
411 else if (i < 4)
412 par = &hose->mem_resources[i-1];
413 else par = NULL;
414
415 res->start = par ? par->start : 0;
416 res->end = par ? par->end : 0;
417 res->flags = par ? par->flags : 0;
418 }
419 }
420 }
421
422 int __init fsl_add_bridge(struct device_node *dev, int is_primary)
423 {
424 int len;
425 struct pci_controller *hose;
426 struct resource rsrc;
427 const int *bus_range;
428 u8 progif;
429
430 if (!of_device_is_available(dev)) {
431 pr_warning("%s: disabled\n", dev->full_name);
432 return -ENODEV;
433 }
434
435 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
436
437 /* Fetch host bridge registers address */
438 if (of_address_to_resource(dev, 0, &rsrc)) {
439 printk(KERN_WARNING "Can't get pci register base!");
440 return -ENOMEM;
441 }
442
443 /* Get bus range if any */
444 bus_range = of_get_property(dev, "bus-range", &len);
445 if (bus_range == NULL || len < 2 * sizeof(int))
446 printk(KERN_WARNING "Can't get bus-range for %s, assume"
447 " bus 0\n", dev->full_name);
448
449 pci_add_flags(PCI_REASSIGN_ALL_BUS);
450 hose = pcibios_alloc_controller(dev);
451 if (!hose)
452 return -ENOMEM;
453
454 hose->first_busno = bus_range ? bus_range[0] : 0x0;
455 hose->last_busno = bus_range ? bus_range[1] : 0xff;
456
457 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
458 PPC_INDIRECT_TYPE_BIG_ENDIAN);
459
460 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
461 if ((progif & 1) == 1) {
462 /* unmap cfg_data & cfg_addr separately if not on same page */
463 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
464 ((unsigned long)hose->cfg_addr & PAGE_MASK))
465 iounmap(hose->cfg_data);
466 iounmap(hose->cfg_addr);
467 pcibios_free_controller(hose);
468 return -ENODEV;
469 }
470
471 setup_pci_cmd(hose);
472
473 /* check PCI express link status */
474 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
475 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
476 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
477 if (fsl_pcie_check_link(hose))
478 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
479 }
480
481 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
482 "Firmware bus number: %d->%d\n",
483 (unsigned long long)rsrc.start, hose->first_busno,
484 hose->last_busno);
485
486 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
487 hose, hose->cfg_addr, hose->cfg_data);
488
489 /* Interpret the "ranges" property */
490 /* This also maps the I/O region and sets isa_io/mem_base */
491 pci_process_bridge_OF_ranges(hose, dev, is_primary);
492
493 /* Setup PEX window registers */
494 setup_pci_atmu(hose, &rsrc);
495
496 return 0;
497 }
498 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
499
500 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_pcie_header);
501
502 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
503 struct mpc83xx_pcie_priv {
504 void __iomem *cfg_type0;
505 void __iomem *cfg_type1;
506 u32 dev_base;
507 };
508
509 struct pex_inbound_window {
510 u32 ar;
511 u32 tar;
512 u32 barl;
513 u32 barh;
514 };
515
516 /*
517 * With the convention of u-boot, the PCIE outbound window 0 serves
518 * as configuration transactions outbound.
519 */
520 #define PEX_OUTWIN0_BAR 0xCA4
521 #define PEX_OUTWIN0_TAL 0xCA8
522 #define PEX_OUTWIN0_TAH 0xCAC
523 #define PEX_RC_INWIN_BASE 0xE60
524 #define PEX_RCIWARn_EN 0x1
525
526 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
527 {
528 struct pci_controller *hose = pci_bus_to_host(bus);
529
530 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
531 return PCIBIOS_DEVICE_NOT_FOUND;
532 /*
533 * Workaround for the HW bug: for Type 0 configure transactions the
534 * PCI-E controller does not check the device number bits and just
535 * assumes that the device number bits are 0.
536 */
537 if (bus->number == hose->first_busno ||
538 bus->primary == hose->first_busno) {
539 if (devfn & 0xf8)
540 return PCIBIOS_DEVICE_NOT_FOUND;
541 }
542
543 if (ppc_md.pci_exclude_device) {
544 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
545 return PCIBIOS_DEVICE_NOT_FOUND;
546 }
547
548 return PCIBIOS_SUCCESSFUL;
549 }
550
551 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
552 unsigned int devfn, int offset)
553 {
554 struct pci_controller *hose = pci_bus_to_host(bus);
555 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
556 u32 dev_base = bus->number << 24 | devfn << 16;
557 int ret;
558
559 ret = mpc83xx_pcie_exclude_device(bus, devfn);
560 if (ret)
561 return NULL;
562
563 offset &= 0xfff;
564
565 /* Type 0 */
566 if (bus->number == hose->first_busno)
567 return pcie->cfg_type0 + offset;
568
569 if (pcie->dev_base == dev_base)
570 goto mapped;
571
572 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
573
574 pcie->dev_base = dev_base;
575 mapped:
576 return pcie->cfg_type1 + offset;
577 }
578
579 static int mpc83xx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
580 int offset, int len, u32 *val)
581 {
582 void __iomem *cfg_addr;
583
584 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
585 if (!cfg_addr)
586 return PCIBIOS_DEVICE_NOT_FOUND;
587
588 switch (len) {
589 case 1:
590 *val = in_8(cfg_addr);
591 break;
592 case 2:
593 *val = in_le16(cfg_addr);
594 break;
595 default:
596 *val = in_le32(cfg_addr);
597 break;
598 }
599
600 return PCIBIOS_SUCCESSFUL;
601 }
602
603 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
604 int offset, int len, u32 val)
605 {
606 struct pci_controller *hose = pci_bus_to_host(bus);
607 void __iomem *cfg_addr;
608
609 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
610 if (!cfg_addr)
611 return PCIBIOS_DEVICE_NOT_FOUND;
612
613 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
614 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
615 val &= 0xffffff00;
616
617 switch (len) {
618 case 1:
619 out_8(cfg_addr, val);
620 break;
621 case 2:
622 out_le16(cfg_addr, val);
623 break;
624 default:
625 out_le32(cfg_addr, val);
626 break;
627 }
628
629 return PCIBIOS_SUCCESSFUL;
630 }
631
632 static struct pci_ops mpc83xx_pcie_ops = {
633 .read = mpc83xx_pcie_read_config,
634 .write = mpc83xx_pcie_write_config,
635 };
636
637 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
638 struct resource *reg)
639 {
640 struct mpc83xx_pcie_priv *pcie;
641 u32 cfg_bar;
642 int ret = -ENOMEM;
643
644 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
645 if (!pcie)
646 return ret;
647
648 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
649 if (!pcie->cfg_type0)
650 goto err0;
651
652 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
653 if (!cfg_bar) {
654 /* PCI-E isn't configured. */
655 ret = -ENODEV;
656 goto err1;
657 }
658
659 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
660 if (!pcie->cfg_type1)
661 goto err1;
662
663 WARN_ON(hose->dn->data);
664 hose->dn->data = pcie;
665 hose->ops = &mpc83xx_pcie_ops;
666
667 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
668 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
669
670 if (fsl_pcie_check_link(hose))
671 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
672
673 return 0;
674 err1:
675 iounmap(pcie->cfg_type0);
676 err0:
677 kfree(pcie);
678 return ret;
679
680 }
681
682 int __init mpc83xx_add_bridge(struct device_node *dev)
683 {
684 int ret;
685 int len;
686 struct pci_controller *hose;
687 struct resource rsrc_reg;
688 struct resource rsrc_cfg;
689 const int *bus_range;
690 int primary;
691
692 is_mpc83xx_pci = 1;
693
694 if (!of_device_is_available(dev)) {
695 pr_warning("%s: disabled by the firmware.\n",
696 dev->full_name);
697 return -ENODEV;
698 }
699 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
700
701 /* Fetch host bridge registers address */
702 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
703 printk(KERN_WARNING "Can't get pci register base!\n");
704 return -ENOMEM;
705 }
706
707 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
708
709 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
710 printk(KERN_WARNING
711 "No pci config register base in dev tree, "
712 "using default\n");
713 /*
714 * MPC83xx supports up to two host controllers
715 * one at 0x8500 has config space registers at 0x8300
716 * one at 0x8600 has config space registers at 0x8380
717 */
718 if ((rsrc_reg.start & 0xfffff) == 0x8500)
719 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
720 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
721 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
722 }
723 /*
724 * Controller at offset 0x8500 is primary
725 */
726 if ((rsrc_reg.start & 0xfffff) == 0x8500)
727 primary = 1;
728 else
729 primary = 0;
730
731 /* Get bus range if any */
732 bus_range = of_get_property(dev, "bus-range", &len);
733 if (bus_range == NULL || len < 2 * sizeof(int)) {
734 printk(KERN_WARNING "Can't get bus-range for %s, assume"
735 " bus 0\n", dev->full_name);
736 }
737
738 pci_add_flags(PCI_REASSIGN_ALL_BUS);
739 hose = pcibios_alloc_controller(dev);
740 if (!hose)
741 return -ENOMEM;
742
743 hose->first_busno = bus_range ? bus_range[0] : 0;
744 hose->last_busno = bus_range ? bus_range[1] : 0xff;
745
746 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
747 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
748 if (ret)
749 goto err0;
750 } else {
751 setup_indirect_pci(hose, rsrc_cfg.start,
752 rsrc_cfg.start + 4, 0);
753 }
754
755 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
756 "Firmware bus number: %d->%d\n",
757 (unsigned long long)rsrc_reg.start, hose->first_busno,
758 hose->last_busno);
759
760 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
761 hose, hose->cfg_addr, hose->cfg_data);
762
763 /* Interpret the "ranges" property */
764 /* This also maps the I/O region and sets isa_io/mem_base */
765 pci_process_bridge_OF_ranges(hose, dev, primary);
766
767 return 0;
768 err0:
769 pcibios_free_controller(hose);
770 return ret;
771 }
772 #endif /* CONFIG_PPC_83xx */
773
774 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
775 {
776 #ifdef CONFIG_PPC_83xx
777 if (is_mpc83xx_pci) {
778 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
779 struct pex_inbound_window *in;
780 int i;
781
782 /* Walk the Root Complex Inbound windows to match IMMR base */
783 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
784 for (i = 0; i < 4; i++) {
785 /* not enabled, skip */
786 if (!in_le32(&in[i].ar) & PEX_RCIWARn_EN)
787 continue;
788
789 if (get_immrbase() == in_le32(&in[i].tar))
790 return (u64)in_le32(&in[i].barh) << 32 |
791 in_le32(&in[i].barl);
792 }
793
794 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
795 }
796 #endif
797
798 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
799 if (!is_mpc83xx_pci) {
800 u32 base;
801
802 pci_bus_read_config_dword(hose->bus,
803 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
804 return base;
805 }
806 #endif
807
808 return 0;
809 }
810
811 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
812 static const struct of_device_id pci_ids[] = {
813 { .compatible = "fsl,mpc8540-pci", },
814 { .compatible = "fsl,mpc8548-pcie", },
815 { .compatible = "fsl,mpc8610-pci", },
816 { .compatible = "fsl,mpc8641-pcie", },
817 { .compatible = "fsl,p1022-pcie", },
818 { .compatible = "fsl,p1010-pcie", },
819 { .compatible = "fsl,p1023-pcie", },
820 { .compatible = "fsl,p4080-pcie", },
821 { .compatible = "fsl,qoriq-pcie-v2.3", },
822 { .compatible = "fsl,qoriq-pcie-v2.2", },
823 {},
824 };
825
826 struct device_node *fsl_pci_primary;
827
828 void __devinit fsl_pci_init(void)
829 {
830 int ret;
831 struct device_node *node;
832 struct pci_controller *hose;
833 dma_addr_t max = 0xffffffff;
834
835 /* Callers can specify the primary bus using other means. */
836 if (!fsl_pci_primary) {
837 /* If a PCI host bridge contains an ISA node, it's primary. */
838 node = of_find_node_by_type(NULL, "isa");
839 while ((fsl_pci_primary = of_get_parent(node))) {
840 of_node_put(node);
841 node = fsl_pci_primary;
842
843 if (of_match_node(pci_ids, node))
844 break;
845 }
846 }
847
848 node = NULL;
849 for_each_node_by_type(node, "pci") {
850 if (of_match_node(pci_ids, node)) {
851 /*
852 * If there's no PCI host bridge with ISA, arbitrarily
853 * designate one as primary. This can go away once
854 * various bugs with primary-less systems are fixed.
855 */
856 if (!fsl_pci_primary)
857 fsl_pci_primary = node;
858
859 ret = fsl_add_bridge(node, fsl_pci_primary == node);
860 if (ret == 0) {
861 hose = pci_find_hose_for_OF_device(node);
862 max = min(max, hose->dma_window_base_cur +
863 hose->dma_window_size);
864 }
865 }
866 }
867
868 #ifdef CONFIG_SWIOTLB
869 /*
870 * if we couldn't map all of DRAM via the dma windows
871 * we need SWIOTLB to handle buffers located outside of
872 * dma capable memory region
873 */
874 if (memblock_end_of_DRAM() - 1 > max) {
875 ppc_swiotlb_enable = 1;
876 set_pci_dma_ops(&swiotlb_dma_ops);
877 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
878 }
879 #endif
880 }
881 #endif
Linux kernel - Deliverables
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