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Linux 3.11-rc3
[cris-mirror.git] / arch / powerpc / sysdev / fsl_pci.c
blob46ac1ddea6832107b045f0391ca3c4f1d86be579
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 quirk_fsl_pcie_header(struct pci_dev *dev)
40 {
41 u8 hdr_type;
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_HEADER_TYPE, &hdr_type);
49 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
50 return;
51
52 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
53 fsl_pcie_bus_fixup = 1;
54 return;
55 }
56
57 static int fsl_indirect_read_config(struct pci_bus *, unsigned int,
58 int, int, u32 *);
59
60 static int fsl_pcie_check_link(struct pci_controller *hose)
61 {
62 u32 val = 0;
63
64 if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
65 if (hose->ops->read == fsl_indirect_read_config) {
66 struct pci_bus bus;
67 bus.number = 0;
68 bus.sysdata = hose;
69 bus.ops = hose->ops;
70 indirect_read_config(&bus, 0, PCIE_LTSSM, 4, &val);
71 } else
72 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
73 if (val < PCIE_LTSSM_L0)
74 return 1;
75 } else {
76 struct ccsr_pci __iomem *pci = hose->private_data;
77 /* for PCIe IP rev 3.0 or greater use CSR0 for link state */
78 val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK)
79 >> PEX_CSR0_LTSSM_SHIFT;
80 if (val != PEX_CSR0_LTSSM_L0)
81 return 1;
82 }
83
84 return 0;
85 }
86
87 static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn,
88 int offset, int len, u32 *val)
89 {
90 struct pci_controller *hose = pci_bus_to_host(bus);
91
92 if (fsl_pcie_check_link(hose))
93 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
94 else
95 hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK;
96
97 return indirect_read_config(bus, devfn, offset, len, val);
98 }
99
100 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
101
102 static struct pci_ops fsl_indirect_pcie_ops =
103 {
104 .read = fsl_indirect_read_config,
105 .write = indirect_write_config,
106 };
107
108 #define MAX_PHYS_ADDR_BITS 40
109 static u64 pci64_dma_offset = 1ull << MAX_PHYS_ADDR_BITS;
110
111 static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
112 {
113 if (!dev->dma_mask || !dma_supported(dev, dma_mask))
114 return -EIO;
115
116 /*
117 * Fixup PCI devices that are able to DMA to above the physical
118 * address width of the SoC such that we can address any internal
119 * SoC address from across PCI if needed
120 */
121 if ((dev->bus == &pci_bus_type) &&
122 dma_mask >= DMA_BIT_MASK(MAX_PHYS_ADDR_BITS)) {
123 set_dma_ops(dev, &dma_direct_ops);
124 set_dma_offset(dev, pci64_dma_offset);
125 }
126
127 *dev->dma_mask = dma_mask;
128 return 0;
129 }
130
131 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
132 unsigned int index, const struct resource *res,
133 resource_size_t offset)
134 {
135 resource_size_t pci_addr = res->start - offset;
136 resource_size_t phys_addr = res->start;
137 resource_size_t size = resource_size(res);
138 u32 flags = 0x80044000; /* enable & mem R/W */
139 unsigned int i;
140
141 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
142 (u64)res->start, (u64)size);
143
144 if (res->flags & IORESOURCE_PREFETCH)
145 flags |= 0x10000000; /* enable relaxed ordering */
146
147 for (i = 0; size > 0; i++) {
148 unsigned int bits = min(ilog2(size),
149 __ffs(pci_addr | phys_addr));
150
151 if (index + i >= 5)
152 return -1;
153
154 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
155 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
156 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
157 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
158
159 pci_addr += (resource_size_t)1U << bits;
160 phys_addr += (resource_size_t)1U << bits;
161 size -= (resource_size_t)1U << bits;
162 }
163
164 return i;
165 }
166
167 /* atmu setup for fsl pci/pcie controller */
168 static void setup_pci_atmu(struct pci_controller *hose)
169 {
170 struct ccsr_pci __iomem *pci = hose->private_data;
171 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
172 u64 mem, sz, paddr_hi = 0;
173 u64 offset = 0, paddr_lo = ULLONG_MAX;
174 u32 pcicsrbar = 0, pcicsrbar_sz;
175 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
176 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
177 const char *name = hose->dn->full_name;
178 const u64 *reg;
179 int len;
180
181 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
182 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
183 win_idx = 2;
184 start_idx = 0;
185 end_idx = 3;
186 }
187 }
188
189 /* Disable all windows (except powar0 since it's ignored) */
190 for(i = 1; i < 5; i++)
191 out_be32(&pci->pow[i].powar, 0);
192 for (i = start_idx; i < end_idx; i++)
193 out_be32(&pci->piw[i].piwar, 0);
194
195 /* Setup outbound MEM window */
196 for(i = 0, j = 1; i < 3; i++) {
197 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
198 continue;
199
200 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
201 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
202
203 /* We assume all memory resources have the same offset */
204 offset = hose->mem_offset[i];
205 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
206
207 if (n < 0 || j >= 5) {
208 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
209 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
210 } else
211 j += n;
212 }
213
214 /* Setup outbound IO window */
215 if (hose->io_resource.flags & IORESOURCE_IO) {
216 if (j >= 5) {
217 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
218 } else {
219 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
220 "phy base 0x%016llx.\n",
221 (u64)hose->io_resource.start,
222 (u64)resource_size(&hose->io_resource),
223 (u64)hose->io_base_phys);
224 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
225 out_be32(&pci->pow[j].potear, 0);
226 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
227 /* Enable, IO R/W */
228 out_be32(&pci->pow[j].powar, 0x80088000
229 | (ilog2(hose->io_resource.end
230 - hose->io_resource.start + 1) - 1));
231 }
232 }
233
234 /* convert to pci address space */
235 paddr_hi -= offset;
236 paddr_lo -= offset;
237
238 if (paddr_hi == paddr_lo) {
239 pr_err("%s: No outbound window space\n", name);
240 return;
241 }
242
243 if (paddr_lo == 0) {
244 pr_err("%s: No space for inbound window\n", name);
245 return;
246 }
247
248 /* setup PCSRBAR/PEXCSRBAR */
249 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
250 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
251 pcicsrbar_sz = ~pcicsrbar_sz + 1;
252
253 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
254 (paddr_lo > 0x100000000ull))
255 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
256 else
257 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
258 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
259
260 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
261
262 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
263
264 /* Setup inbound mem window */
265 mem = memblock_end_of_DRAM();
266
267 /*
268 * The msi-address-64 property, if it exists, indicates the physical
269 * address of the MSIIR register. Normally, this register is located
270 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
271 * this property exists, then we normally need to create a new ATMU
272 * for it. For now, however, we cheat. The only entity that creates
273 * this property is the Freescale hypervisor, and the address is
274 * specified in the partition configuration. Typically, the address
275 * is located in the page immediately after the end of DDR. If so, we
276 * can avoid allocating a new ATMU by extending the DDR ATMU by one
277 * page.
278 */
279 reg = of_get_property(hose->dn, "msi-address-64", &len);
280 if (reg && (len == sizeof(u64))) {
281 u64 address = be64_to_cpup(reg);
282
283 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
284 pr_info("%s: extending DDR ATMU to cover MSIIR", name);
285 mem += PAGE_SIZE;
286 } else {
287 /* TODO: Create a new ATMU for MSIIR */
288 pr_warn("%s: msi-address-64 address of %llx is "
289 "unsupported\n", name, address);
290 }
291 }
292
293 sz = min(mem, paddr_lo);
294 mem_log = ilog2(sz);
295
296 /* PCIe can overmap inbound & outbound since RX & TX are separated */
297 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
298 /* Size window to exact size if power-of-two or one size up */
299 if ((1ull << mem_log) != mem) {
300 if ((1ull << mem_log) > mem)
301 pr_info("%s: Setting PCI inbound window "
302 "greater than memory size\n", name);
303 mem_log++;
304 }
305
306 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
307
308 /* Setup inbound memory window */
309 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
310 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
311 out_be32(&pci->piw[win_idx].piwar, piwar);
312 win_idx--;
313
314 hose->dma_window_base_cur = 0x00000000;
315 hose->dma_window_size = (resource_size_t)sz;
316
317 /*
318 * if we have >4G of memory setup second PCI inbound window to
319 * let devices that are 64-bit address capable to work w/o
320 * SWIOTLB and access the full range of memory
321 */
322 if (sz != mem) {
323 mem_log = ilog2(mem);
324
325 /* Size window up if we dont fit in exact power-of-2 */
326 if ((1ull << mem_log) != mem)
327 mem_log++;
328
329 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
330
331 /* Setup inbound memory window */
332 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
333 out_be32(&pci->piw[win_idx].piwbear,
334 pci64_dma_offset >> 44);
335 out_be32(&pci->piw[win_idx].piwbar,
336 pci64_dma_offset >> 12);
337 out_be32(&pci->piw[win_idx].piwar, piwar);
338
339 /*
340 * install our own dma_set_mask handler to fixup dma_ops
341 * and dma_offset
342 */
343 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
344
345 pr_info("%s: Setup 64-bit PCI DMA window\n", name);
346 }
347 } else {
348 u64 paddr = 0;
349
350 /* Setup inbound memory window */
351 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
352 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
353 out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1)));
354 win_idx--;
355
356 paddr += 1ull << mem_log;
357 sz -= 1ull << mem_log;
358
359 if (sz) {
360 mem_log = ilog2(sz);
361 piwar |= (mem_log - 1);
362
363 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
364 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
365 out_be32(&pci->piw[win_idx].piwar, piwar);
366 win_idx--;
367
368 paddr += 1ull << mem_log;
369 }
370
371 hose->dma_window_base_cur = 0x00000000;
372 hose->dma_window_size = (resource_size_t)paddr;
373 }
374
375 if (hose->dma_window_size < mem) {
376 #ifndef CONFIG_SWIOTLB
377 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
378 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
379 name);
380 #endif
381 /* adjusting outbound windows could reclaim space in mem map */
382 if (paddr_hi < 0xffffffffull)
383 pr_warning("%s: WARNING: Outbound window cfg leaves "
384 "gaps in memory map. Adjusting the memory map "
385 "could reduce unnecessary bounce buffering.\n",
386 name);
387
388 pr_info("%s: DMA window size is 0x%llx\n", name,
389 (u64)hose->dma_window_size);
390 }
391 }
392
393 static void __init setup_pci_cmd(struct pci_controller *hose)
394 {
395 u16 cmd;
396 int cap_x;
397
398 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
399 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
400 | PCI_COMMAND_IO;
401 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
402
403 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
404 if (cap_x) {
405 int pci_x_cmd = cap_x + PCI_X_CMD;
406 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
407 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
408 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
409 } else {
410 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
411 }
412 }
413
414 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
415 {
416 struct pci_controller *hose = pci_bus_to_host(bus);
417 int i, is_pcie = 0, no_link;
418
419 /* The root complex bridge comes up with bogus resources,
420 * we copy the PHB ones in.
421 *
422 * With the current generic PCI code, the PHB bus no longer
423 * has bus->resource[0..4] set, so things are a bit more
424 * tricky.
425 */
426
427 if (fsl_pcie_bus_fixup)
428 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
429 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
430
431 if (bus->parent == hose->bus && (is_pcie || no_link)) {
432 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
433 struct resource *res = bus->resource[i];
434 struct resource *par;
435
436 if (!res)
437 continue;
438 if (i == 0)
439 par = &hose->io_resource;
440 else if (i < 4)
441 par = &hose->mem_resources[i-1];
442 else par = NULL;
443
444 res->start = par ? par->start : 0;
445 res->end = par ? par->end : 0;
446 res->flags = par ? par->flags : 0;
447 }
448 }
449 }
450
451 int __init fsl_add_bridge(struct platform_device *pdev, int is_primary)
452 {
453 int len;
454 struct pci_controller *hose;
455 struct resource rsrc;
456 const int *bus_range;
457 u8 hdr_type, progif;
458 struct device_node *dev;
459 struct ccsr_pci __iomem *pci;
460
461 dev = pdev->dev.of_node;
462
463 if (!of_device_is_available(dev)) {
464 pr_warning("%s: disabled\n", dev->full_name);
465 return -ENODEV;
466 }
467
468 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
469
470 /* Fetch host bridge registers address */
471 if (of_address_to_resource(dev, 0, &rsrc)) {
472 printk(KERN_WARNING "Can't get pci register base!");
473 return -ENOMEM;
474 }
475
476 /* Get bus range if any */
477 bus_range = of_get_property(dev, "bus-range", &len);
478 if (bus_range == NULL || len < 2 * sizeof(int))
479 printk(KERN_WARNING "Can't get bus-range for %s, assume"
480 " bus 0\n", dev->full_name);
481
482 pci_add_flags(PCI_REASSIGN_ALL_BUS);
483 hose = pcibios_alloc_controller(dev);
484 if (!hose)
485 return -ENOMEM;
486
487 /* set platform device as the parent */
488 hose->parent = &pdev->dev;
489 hose->first_busno = bus_range ? bus_range[0] : 0x0;
490 hose->last_busno = bus_range ? bus_range[1] : 0xff;
491
492 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
493 (u64)rsrc.start, (u64)resource_size(&rsrc));
494
495 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
496 if (!hose->private_data)
497 goto no_bridge;
498
499 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
500 PPC_INDIRECT_TYPE_BIG_ENDIAN);
501
502 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
503 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
504
505 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
506 /* use fsl_indirect_read_config for PCIe */
507 hose->ops = &fsl_indirect_pcie_ops;
508 /* For PCIE read HEADER_TYPE to identify controler mode */
509 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
510 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
511 goto no_bridge;
512
513 } else {
514 /* For PCI read PROG to identify controller mode */
515 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
516 if ((progif & 1) == 1)
517 goto no_bridge;
518 }
519
520 setup_pci_cmd(hose);
521
522 /* check PCI express link status */
523 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
524 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
525 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
526 if (fsl_pcie_check_link(hose))
527 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
528 }
529
530 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
531 "Firmware bus number: %d->%d\n",
532 (unsigned long long)rsrc.start, hose->first_busno,
533 hose->last_busno);
534
535 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
536 hose, hose->cfg_addr, hose->cfg_data);
537
538 /* Interpret the "ranges" property */
539 /* This also maps the I/O region and sets isa_io/mem_base */
540 pci_process_bridge_OF_ranges(hose, dev, is_primary);
541
542 /* Setup PEX window registers */
543 setup_pci_atmu(hose);
544
545 return 0;
546
547 no_bridge:
548 iounmap(hose->private_data);
549 /* unmap cfg_data & cfg_addr separately if not on same page */
550 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
551 ((unsigned long)hose->cfg_addr & PAGE_MASK))
552 iounmap(hose->cfg_data);
553 iounmap(hose->cfg_addr);
554 pcibios_free_controller(hose);
555 return -ENODEV;
556 }
557 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
558
559 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_pcie_header);
560
561 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
562 struct mpc83xx_pcie_priv {
563 void __iomem *cfg_type0;
564 void __iomem *cfg_type1;
565 u32 dev_base;
566 };
567
568 struct pex_inbound_window {
569 u32 ar;
570 u32 tar;
571 u32 barl;
572 u32 barh;
573 };
574
575 /*
576 * With the convention of u-boot, the PCIE outbound window 0 serves
577 * as configuration transactions outbound.
578 */
579 #define PEX_OUTWIN0_BAR 0xCA4
580 #define PEX_OUTWIN0_TAL 0xCA8
581 #define PEX_OUTWIN0_TAH 0xCAC
582 #define PEX_RC_INWIN_BASE 0xE60
583 #define PEX_RCIWARn_EN 0x1
584
585 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
586 {
587 struct pci_controller *hose = pci_bus_to_host(bus);
588
589 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
590 return PCIBIOS_DEVICE_NOT_FOUND;
591 /*
592 * Workaround for the HW bug: for Type 0 configure transactions the
593 * PCI-E controller does not check the device number bits and just
594 * assumes that the device number bits are 0.
595 */
596 if (bus->number == hose->first_busno ||
597 bus->primary == hose->first_busno) {
598 if (devfn & 0xf8)
599 return PCIBIOS_DEVICE_NOT_FOUND;
600 }
601
602 if (ppc_md.pci_exclude_device) {
603 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
604 return PCIBIOS_DEVICE_NOT_FOUND;
605 }
606
607 return PCIBIOS_SUCCESSFUL;
608 }
609
610 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
611 unsigned int devfn, int offset)
612 {
613 struct pci_controller *hose = pci_bus_to_host(bus);
614 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
615 u32 dev_base = bus->number << 24 | devfn << 16;
616 int ret;
617
618 ret = mpc83xx_pcie_exclude_device(bus, devfn);
619 if (ret)
620 return NULL;
621
622 offset &= 0xfff;
623
624 /* Type 0 */
625 if (bus->number == hose->first_busno)
626 return pcie->cfg_type0 + offset;
627
628 if (pcie->dev_base == dev_base)
629 goto mapped;
630
631 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
632
633 pcie->dev_base = dev_base;
634 mapped:
635 return pcie->cfg_type1 + offset;
636 }
637
638 static int mpc83xx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
639 int offset, int len, u32 *val)
640 {
641 void __iomem *cfg_addr;
642
643 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
644 if (!cfg_addr)
645 return PCIBIOS_DEVICE_NOT_FOUND;
646
647 switch (len) {
648 case 1:
649 *val = in_8(cfg_addr);
650 break;
651 case 2:
652 *val = in_le16(cfg_addr);
653 break;
654 default:
655 *val = in_le32(cfg_addr);
656 break;
657 }
658
659 return PCIBIOS_SUCCESSFUL;
660 }
661
662 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
663 int offset, int len, u32 val)
664 {
665 struct pci_controller *hose = pci_bus_to_host(bus);
666 void __iomem *cfg_addr;
667
668 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
669 if (!cfg_addr)
670 return PCIBIOS_DEVICE_NOT_FOUND;
671
672 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
673 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
674 val &= 0xffffff00;
675
676 switch (len) {
677 case 1:
678 out_8(cfg_addr, val);
679 break;
680 case 2:
681 out_le16(cfg_addr, val);
682 break;
683 default:
684 out_le32(cfg_addr, val);
685 break;
686 }
687
688 return PCIBIOS_SUCCESSFUL;
689 }
690
691 static struct pci_ops mpc83xx_pcie_ops = {
692 .read = mpc83xx_pcie_read_config,
693 .write = mpc83xx_pcie_write_config,
694 };
695
696 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
697 struct resource *reg)
698 {
699 struct mpc83xx_pcie_priv *pcie;
700 u32 cfg_bar;
701 int ret = -ENOMEM;
702
703 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
704 if (!pcie)
705 return ret;
706
707 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
708 if (!pcie->cfg_type0)
709 goto err0;
710
711 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
712 if (!cfg_bar) {
713 /* PCI-E isn't configured. */
714 ret = -ENODEV;
715 goto err1;
716 }
717
718 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
719 if (!pcie->cfg_type1)
720 goto err1;
721
722 WARN_ON(hose->dn->data);
723 hose->dn->data = pcie;
724 hose->ops = &mpc83xx_pcie_ops;
725 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
726
727 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
728 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
729
730 if (fsl_pcie_check_link(hose))
731 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
732
733 return 0;
734 err1:
735 iounmap(pcie->cfg_type0);
736 err0:
737 kfree(pcie);
738 return ret;
739
740 }
741
742 int __init mpc83xx_add_bridge(struct device_node *dev)
743 {
744 int ret;
745 int len;
746 struct pci_controller *hose;
747 struct resource rsrc_reg;
748 struct resource rsrc_cfg;
749 const int *bus_range;
750 int primary;
751
752 is_mpc83xx_pci = 1;
753
754 if (!of_device_is_available(dev)) {
755 pr_warning("%s: disabled by the firmware.\n",
756 dev->full_name);
757 return -ENODEV;
758 }
759 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
760
761 /* Fetch host bridge registers address */
762 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
763 printk(KERN_WARNING "Can't get pci register base!\n");
764 return -ENOMEM;
765 }
766
767 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
768
769 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
770 printk(KERN_WARNING
771 "No pci config register base in dev tree, "
772 "using default\n");
773 /*
774 * MPC83xx supports up to two host controllers
775 * one at 0x8500 has config space registers at 0x8300
776 * one at 0x8600 has config space registers at 0x8380
777 */
778 if ((rsrc_reg.start & 0xfffff) == 0x8500)
779 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
780 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
781 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
782 }
783 /*
784 * Controller at offset 0x8500 is primary
785 */
786 if ((rsrc_reg.start & 0xfffff) == 0x8500)
787 primary = 1;
788 else
789 primary = 0;
790
791 /* Get bus range if any */
792 bus_range = of_get_property(dev, "bus-range", &len);
793 if (bus_range == NULL || len < 2 * sizeof(int)) {
794 printk(KERN_WARNING "Can't get bus-range for %s, assume"
795 " bus 0\n", dev->full_name);
796 }
797
798 pci_add_flags(PCI_REASSIGN_ALL_BUS);
799 hose = pcibios_alloc_controller(dev);
800 if (!hose)
801 return -ENOMEM;
802
803 hose->first_busno = bus_range ? bus_range[0] : 0;
804 hose->last_busno = bus_range ? bus_range[1] : 0xff;
805
806 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
807 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
808 if (ret)
809 goto err0;
810 } else {
811 setup_indirect_pci(hose, rsrc_cfg.start,
812 rsrc_cfg.start + 4, 0);
813 }
814
815 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
816 "Firmware bus number: %d->%d\n",
817 (unsigned long long)rsrc_reg.start, hose->first_busno,
818 hose->last_busno);
819
820 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
821 hose, hose->cfg_addr, hose->cfg_data);
822
823 /* Interpret the "ranges" property */
824 /* This also maps the I/O region and sets isa_io/mem_base */
825 pci_process_bridge_OF_ranges(hose, dev, primary);
826
827 return 0;
828 err0:
829 pcibios_free_controller(hose);
830 return ret;
831 }
832 #endif /* CONFIG_PPC_83xx */
833
834 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
835 {
836 #ifdef CONFIG_PPC_83xx
837 if (is_mpc83xx_pci) {
838 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
839 struct pex_inbound_window *in;
840 int i;
841
842 /* Walk the Root Complex Inbound windows to match IMMR base */
843 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
844 for (i = 0; i < 4; i++) {
845 /* not enabled, skip */
846 if (!in_le32(&in[i].ar) & PEX_RCIWARn_EN)
847 continue;
848
849 if (get_immrbase() == in_le32(&in[i].tar))
850 return (u64)in_le32(&in[i].barh) << 32 |
851 in_le32(&in[i].barl);
852 }
853
854 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
855 }
856 #endif
857
858 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
859 if (!is_mpc83xx_pci) {
860 u32 base;
861
862 pci_bus_read_config_dword(hose->bus,
863 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
864 return base;
865 }
866 #endif
867
868 return 0;
869 }
870
871 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
872 static const struct of_device_id pci_ids[] = {
873 { .compatible = "fsl,mpc8540-pci", },
874 { .compatible = "fsl,mpc8548-pcie", },
875 { .compatible = "fsl,mpc8610-pci", },
876 { .compatible = "fsl,mpc8641-pcie", },
877 { .compatible = "fsl,qoriq-pcie-v2.1", },
878 { .compatible = "fsl,qoriq-pcie-v2.2", },
879 { .compatible = "fsl,qoriq-pcie-v2.3", },
880 { .compatible = "fsl,qoriq-pcie-v2.4", },
881 { .compatible = "fsl,qoriq-pcie-v3.0", },
882
883 /*
884 * The following entries are for compatibility with older device
885 * trees.
886 */
887 { .compatible = "fsl,p1022-pcie", },
888 { .compatible = "fsl,p4080-pcie", },
889
890 {},
891 };
892
893 struct device_node *fsl_pci_primary;
894
895 void fsl_pci_assign_primary(void)
896 {
897 struct device_node *np;
898
899 /* Callers can specify the primary bus using other means. */
900 if (fsl_pci_primary)
901 return;
902
903 /* If a PCI host bridge contains an ISA node, it's primary. */
904 np = of_find_node_by_type(NULL, "isa");
905 while ((fsl_pci_primary = of_get_parent(np))) {
906 of_node_put(np);
907 np = fsl_pci_primary;
908
909 if (of_match_node(pci_ids, np) && of_device_is_available(np))
910 return;
911 }
912
913 /*
914 * If there's no PCI host bridge with ISA, arbitrarily
915 * designate one as primary. This can go away once
916 * various bugs with primary-less systems are fixed.
917 */
918 for_each_matching_node(np, pci_ids) {
919 if (of_device_is_available(np)) {
920 fsl_pci_primary = np;
921 of_node_put(np);
922 return;
923 }
924 }
925 }
926
927 static int fsl_pci_probe(struct platform_device *pdev)
928 {
929 int ret;
930 struct device_node *node;
931 #ifdef CONFIG_SWIOTLB
932 struct pci_controller *hose;
933 #endif
934
935 node = pdev->dev.of_node;
936 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
937
938 #ifdef CONFIG_SWIOTLB
939 if (ret == 0) {
940 hose = pci_find_hose_for_OF_device(pdev->dev.of_node);
941
942 /*
943 * if we couldn't map all of DRAM via the dma windows
944 * we need SWIOTLB to handle buffers located outside of
945 * dma capable memory region
946 */
947 if (memblock_end_of_DRAM() - 1 > hose->dma_window_base_cur +
948 hose->dma_window_size)
949 ppc_swiotlb_enable = 1;
950 }
951 #endif
952
953 mpc85xx_pci_err_probe(pdev);
954
955 return 0;
956 }
957
958 #ifdef CONFIG_PM
959 static int fsl_pci_resume(struct device *dev)
960 {
961 struct pci_controller *hose;
962 struct resource pci_rsrc;
963
964 hose = pci_find_hose_for_OF_device(dev->of_node);
965 if (!hose)
966 return -ENODEV;
967
968 if (of_address_to_resource(dev->of_node, 0, &pci_rsrc)) {
969 dev_err(dev, "Get pci register base failed.");
970 return -ENODEV;
971 }
972
973 setup_pci_atmu(hose);
974
975 return 0;
976 }
977
978 static const struct dev_pm_ops pci_pm_ops = {
979 .resume = fsl_pci_resume,
980 };
981
982 #define PCI_PM_OPS (&pci_pm_ops)
983
984 #else
985
986 #define PCI_PM_OPS NULL
987
988 #endif
989
990 static struct platform_driver fsl_pci_driver = {
991 .driver = {
992 .name = "fsl-pci",
993 .pm = PCI_PM_OPS,
994 .of_match_table = pci_ids,
995 },
996 .probe = fsl_pci_probe,
997 };
998
999 static int __init fsl_pci_init(void)
1000 {
1001 return platform_driver_register(&fsl_pci_driver);
1002 }
1003 arch_initcall(fsl_pci_init);
1004 #endif
CRIS linux kernel tree