1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * MPC83xx/85xx/86xx PCI/PCIE support routing.
4 *
5 * Copyright 2007-2012 Freescale Semiconductor, Inc.
6 * Copyright 2008-2009 MontaVista Software, Inc.
7 *
8 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
9 * Recode: ZHANG WEI <wei.zhang@freescale.com>
10 * Rewrite the routing for Frescale PCI and PCI Express
11 * Roy Zang <tie-fei.zang@freescale.com>
12 * MPC83xx PCI-Express support:
13 * Tony Li <tony.li@freescale.com>
14 * Anton Vorontsov <avorontsov@ru.mvista.com>
15 */
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/delay.h>
19 #include <linux/string.h>
20 #include <linux/fsl/edac.h>
21 #include <linux/init.h>
22 #include <linux/interrupt.h>
23 #include <linux/memblock.h>
24 #include <linux/log2.h>
25 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/suspend.h>
28 #include <linux/syscore_ops.h>
29 #include <linux/uaccess.h>
30
31 #include <asm/io.h>
32 #include <asm/prom.h>
33 #include <asm/pci-bridge.h>
34 #include <asm/ppc-pci.h>
35 #include <asm/machdep.h>
36 #include <asm/mpc85xx.h>
37 #include <asm/disassemble.h>
38 #include <asm/ppc-opcode.h>
39 #include <asm/swiotlb.h>
40 #include <sysdev/fsl_soc.h>
41 #include <sysdev/fsl_pci.h>
42
43 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
44
quirk_fsl_pcie_early(struct pci_dev * dev)45 static void quirk_fsl_pcie_early(struct pci_dev *dev)
46 {
47 u8 hdr_type;
48
49 /* if we aren't a PCIe don't bother */
50 if (!pci_is_pcie(dev))
51 return;
52
53 /* if we aren't in host mode don't bother */
54 pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type);
55 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
56 return;
57
58 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
59 fsl_pcie_bus_fixup = 1;
60 return;
61 }
62
63 static int fsl_indirect_read_config(struct pci_bus *, unsigned int,
64 int, int, u32 *);
65
fsl_pcie_check_link(struct pci_controller * hose)66 static int fsl_pcie_check_link(struct pci_controller *hose)
67 {
68 u32 val = 0;
69
70 if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) {
71 if (hose->ops->read == fsl_indirect_read_config)
72 __indirect_read_config(hose, hose->first_busno, 0,
73 PCIE_LTSSM, 4, &val);
74 else
75 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
76 if (val < PCIE_LTSSM_L0)
77 return 1;
78 } else {
79 struct ccsr_pci __iomem *pci = hose->private_data;
80 /* for PCIe IP rev 3.0 or greater use CSR0 for link state */
81 val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK)
82 >> PEX_CSR0_LTSSM_SHIFT;
83 if (val != PEX_CSR0_LTSSM_L0)
84 return 1;
85 }
86
87 return 0;
88 }
89
fsl_indirect_read_config(struct pci_bus * bus,unsigned int devfn,int offset,int len,u32 * val)90 static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn,
91 int offset, int len, u32 *val)
92 {
93 struct pci_controller *hose = pci_bus_to_host(bus);
94
95 if (fsl_pcie_check_link(hose))
96 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
97 else
98 hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK;
99
100 return indirect_read_config(bus, devfn, offset, len, val);
101 }
102
103 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
104
105 static struct pci_ops fsl_indirect_pcie_ops =
106 {
107 .read = fsl_indirect_read_config,
108 .write = indirect_write_config,
109 };
110
111 static u64 pci64_dma_offset;
112
113 #ifdef CONFIG_SWIOTLB
pci_dma_dev_setup_swiotlb(struct pci_dev * pdev)114 static void pci_dma_dev_setup_swiotlb(struct pci_dev *pdev)
115 {
116 struct pci_controller *hose = pci_bus_to_host(pdev->bus);
117
118 pdev->dev.bus_dma_limit =
119 hose->dma_window_base_cur + hose->dma_window_size - 1;
120 }
121
setup_swiotlb_ops(struct pci_controller * hose)122 static void setup_swiotlb_ops(struct pci_controller *hose)
123 {
124 if (ppc_swiotlb_enable)
125 hose->controller_ops.dma_dev_setup = pci_dma_dev_setup_swiotlb;
126 }
127 #else
setup_swiotlb_ops(struct pci_controller * hose)128 static inline void setup_swiotlb_ops(struct pci_controller *hose) {}
129 #endif
130
fsl_pci_dma_set_mask(struct device * dev,u64 dma_mask)131 static void fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask)
132 {
133 /*
134 * Fix up PCI devices that are able to DMA to the large inbound
135 * mapping that allows addressing any RAM address from across PCI.
136 */
137 if (dev_is_pci(dev) && dma_mask >= pci64_dma_offset * 2 - 1) {
138 dev->bus_dma_limit = 0;
139 dev->archdata.dma_offset = pci64_dma_offset;
140 }
141 }
142
setup_one_atmu(struct ccsr_pci __iomem * pci,unsigned int index,const struct resource * res,resource_size_t offset)143 static int setup_one_atmu(struct ccsr_pci __iomem *pci,
144 unsigned int index, const struct resource *res,
145 resource_size_t offset)
146 {
147 resource_size_t pci_addr = res->start - offset;
148 resource_size_t phys_addr = res->start;
149 resource_size_t size = resource_size(res);
150 u32 flags = 0x80044000; /* enable & mem R/W */
151 unsigned int i;
152
153 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
154 (u64)res->start, (u64)size);
155
156 if (res->flags & IORESOURCE_PREFETCH)
157 flags |= 0x10000000; /* enable relaxed ordering */
158
159 for (i = 0; size > 0; i++) {
160 unsigned int bits = min_t(u32, ilog2(size),
161 __ffs(pci_addr | phys_addr));
162
163 if (index + i >= 5)
164 return -1;
165
166 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
167 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
168 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
169 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
170
171 pci_addr += (resource_size_t)1U << bits;
172 phys_addr += (resource_size_t)1U << bits;
173 size -= (resource_size_t)1U << bits;
174 }
175
176 return i;
177 }
178
is_kdump(void)179 static bool is_kdump(void)
180 {
181 struct device_node *node;
182
183 node = of_find_node_by_type(NULL, "memory");
184 if (!node) {
185 WARN_ON_ONCE(1);
186 return false;
187 }
188
189 return of_property_read_bool(node, "linux,usable-memory");
190 }
191
192 /* atmu setup for fsl pci/pcie controller */
setup_pci_atmu(struct pci_controller * hose)193 static void setup_pci_atmu(struct pci_controller *hose)
194 {
195 struct ccsr_pci __iomem *pci = hose->private_data;
196 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
197 u64 mem, sz, paddr_hi = 0;
198 u64 offset = 0, paddr_lo = ULLONG_MAX;
199 u32 pcicsrbar = 0, pcicsrbar_sz;
200 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
201 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
202 const u64 *reg;
203 int len;
204 bool setup_inbound;
205
206 /*
207 * If this is kdump, we don't want to trigger a bunch of PCI
208 * errors by closing the window on in-flight DMA.
209 *
210 * We still run most of the function's logic so that things like
211 * hose->dma_window_size still get set.
212 */
213 setup_inbound = !is_kdump();
214
215 if (of_device_is_compatible(hose->dn, "fsl,bsc9132-pcie")) {
216 /*
217 * BSC9132 Rev1.0 has an issue where all the PEX inbound
218 * windows have implemented the default target value as 0xf
219 * for CCSR space.In all Freescale legacy devices the target
220 * of 0xf is reserved for local memory space. 9132 Rev1.0
221 * now has local mempry space mapped to target 0x0 instead of
222 * 0xf. Hence adding a workaround to remove the target 0xf
223 * defined for memory space from Inbound window attributes.
224 */
225 piwar &= ~PIWAR_TGI_LOCAL;
226 }
227
228 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
229 if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) {
230 win_idx = 2;
231 start_idx = 0;
232 end_idx = 3;
233 }
234 }
235
236 /* Disable all windows (except powar0 since it's ignored) */
237 for(i = 1; i < 5; i++)
238 out_be32(&pci->pow[i].powar, 0);
239
240 if (setup_inbound) {
241 for (i = start_idx; i < end_idx; i++)
242 out_be32(&pci->piw[i].piwar, 0);
243 }
244
245 /* Setup outbound MEM window */
246 for(i = 0, j = 1; i < 3; i++) {
247 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
248 continue;
249
250 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
251 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
252
253 /* We assume all memory resources have the same offset */
254 offset = hose->mem_offset[i];
255 n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset);
256
257 if (n < 0 || j >= 5) {
258 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
259 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
260 } else
261 j += n;
262 }
263
264 /* Setup outbound IO window */
265 if (hose->io_resource.flags & IORESOURCE_IO) {
266 if (j >= 5) {
267 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
268 } else {
269 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
270 "phy base 0x%016llx.\n",
271 (u64)hose->io_resource.start,
272 (u64)resource_size(&hose->io_resource),
273 (u64)hose->io_base_phys);
274 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
275 out_be32(&pci->pow[j].potear, 0);
276 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
277 /* Enable, IO R/W */
278 out_be32(&pci->pow[j].powar, 0x80088000
279 | (ilog2(hose->io_resource.end
280 - hose->io_resource.start + 1) - 1));
281 }
282 }
283
284 /* convert to pci address space */
285 paddr_hi -= offset;
286 paddr_lo -= offset;
287
288 if (paddr_hi == paddr_lo) {
289 pr_err("%pOF: No outbound window space\n", hose->dn);
290 return;
291 }
292
293 if (paddr_lo == 0) {
294 pr_err("%pOF: No space for inbound window\n", hose->dn);
295 return;
296 }
297
298 /* setup PCSRBAR/PEXCSRBAR */
299 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
300 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
301 pcicsrbar_sz = ~pcicsrbar_sz + 1;
302
303 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
304 (paddr_lo > 0x100000000ull))
305 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
306 else
307 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
308 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
309
310 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
311
312 pr_info("%pOF: PCICSRBAR @ 0x%x\n", hose->dn, pcicsrbar);
313
314 /* Setup inbound mem window */
315 mem = memblock_end_of_DRAM();
316 pr_info("%s: end of DRAM %llx\n", __func__, mem);
317
318 /*
319 * The msi-address-64 property, if it exists, indicates the physical
320 * address of the MSIIR register. Normally, this register is located
321 * inside CCSR, so the ATMU that covers all of CCSR is used. But if
322 * this property exists, then we normally need to create a new ATMU
323 * for it. For now, however, we cheat. The only entity that creates
324 * this property is the Freescale hypervisor, and the address is
325 * specified in the partition configuration. Typically, the address
326 * is located in the page immediately after the end of DDR. If so, we
327 * can avoid allocating a new ATMU by extending the DDR ATMU by one
328 * page.
329 */
330 reg = of_get_property(hose->dn, "msi-address-64", &len);
331 if (reg && (len == sizeof(u64))) {
332 u64 address = be64_to_cpup(reg);
333
334 if ((address >= mem) && (address < (mem + PAGE_SIZE))) {
335 pr_info("%pOF: extending DDR ATMU to cover MSIIR", hose->dn);
336 mem += PAGE_SIZE;
337 } else {
338 /* TODO: Create a new ATMU for MSIIR */
339 pr_warn("%pOF: msi-address-64 address of %llx is "
340 "unsupported\n", hose->dn, address);
341 }
342 }
343
344 sz = min(mem, paddr_lo);
345 mem_log = ilog2(sz);
346
347 /* PCIe can overmap inbound & outbound since RX & TX are separated */
348 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
349 /* Size window to exact size if power-of-two or one size up */
350 if ((1ull << mem_log) != mem) {
351 mem_log++;
352 if ((1ull << mem_log) > mem)
353 pr_info("%pOF: Setting PCI inbound window "
354 "greater than memory size\n", hose->dn);
355 }
356
357 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
358
359 if (setup_inbound) {
360 /* Setup inbound memory window */
361 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
362 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
363 out_be32(&pci->piw[win_idx].piwar, piwar);
364 }
365
366 win_idx--;
367 hose->dma_window_base_cur = 0x00000000;
368 hose->dma_window_size = (resource_size_t)sz;
369
370 /*
371 * if we have >4G of memory setup second PCI inbound window to
372 * let devices that are 64-bit address capable to work w/o
373 * SWIOTLB and access the full range of memory
374 */
375 if (sz != mem) {
376 mem_log = ilog2(mem);
377
378 /* Size window up if we dont fit in exact power-of-2 */
379 if ((1ull << mem_log) != mem)
380 mem_log++;
381
382 piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1);
383 pci64_dma_offset = 1ULL << mem_log;
384
385 if (setup_inbound) {
386 /* Setup inbound memory window */
387 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
388 out_be32(&pci->piw[win_idx].piwbear,
389 pci64_dma_offset >> 44);
390 out_be32(&pci->piw[win_idx].piwbar,
391 pci64_dma_offset >> 12);
392 out_be32(&pci->piw[win_idx].piwar, piwar);
393 }
394
395 /*
396 * install our own dma_set_mask handler to fixup dma_ops
397 * and dma_offset
398 */
399 ppc_md.dma_set_mask = fsl_pci_dma_set_mask;
400
401 pr_info("%pOF: Setup 64-bit PCI DMA window\n", hose->dn);
402 }
403 } else {
404 u64 paddr = 0;
405
406 if (setup_inbound) {
407 /* Setup inbound memory window */
408 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
409 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
410 out_be32(&pci->piw[win_idx].piwar,
411 (piwar | (mem_log - 1)));
412 }
413
414 win_idx--;
415 paddr += 1ull << mem_log;
416 sz -= 1ull << mem_log;
417
418 if (sz) {
419 mem_log = ilog2(sz);
420 piwar |= (mem_log - 1);
421
422 if (setup_inbound) {
423 out_be32(&pci->piw[win_idx].pitar,
424 paddr >> 12);
425 out_be32(&pci->piw[win_idx].piwbar,
426 paddr >> 12);
427 out_be32(&pci->piw[win_idx].piwar, piwar);
428 }
429
430 win_idx--;
431 paddr += 1ull << mem_log;
432 }
433
434 hose->dma_window_base_cur = 0x00000000;
435 hose->dma_window_size = (resource_size_t)paddr;
436 }
437
438 if (hose->dma_window_size < mem) {
439 #ifdef CONFIG_SWIOTLB
440 ppc_swiotlb_enable = 1;
441 #else
442 pr_err("%pOF: ERROR: Memory size exceeds PCI ATMU ability to "
443 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
444 hose->dn);
445 #endif
446 /* adjusting outbound windows could reclaim space in mem map */
447 if (paddr_hi < 0xffffffffull)
448 pr_warn("%pOF: WARNING: Outbound window cfg leaves "
449 "gaps in memory map. Adjusting the memory map "
450 "could reduce unnecessary bounce buffering.\n",
451 hose->dn);
452
453 pr_info("%pOF: DMA window size is 0x%llx\n", hose->dn,
454 (u64)hose->dma_window_size);
455 }
456 }
457
setup_pci_cmd(struct pci_controller * hose)458 static void __init setup_pci_cmd(struct pci_controller *hose)
459 {
460 u16 cmd;
461 int cap_x;
462
463 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
464 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
465 | PCI_COMMAND_IO;
466 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
467
468 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
469 if (cap_x) {
470 int pci_x_cmd = cap_x + PCI_X_CMD;
471 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
472 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
473 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
474 } else {
475 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
476 }
477 }
478
fsl_pcibios_fixup_bus(struct pci_bus * bus)479 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
480 {
481 struct pci_controller *hose = pci_bus_to_host(bus);
482 int i, is_pcie = 0, no_link;
483
484 /* The root complex bridge comes up with bogus resources,
485 * we copy the PHB ones in.
486 *
487 * With the current generic PCI code, the PHB bus no longer
488 * has bus->resource[0..4] set, so things are a bit more
489 * tricky.
490 */
491
492 if (fsl_pcie_bus_fixup)
493 is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP);
494 no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK);
495
496 if (bus->parent == hose->bus && (is_pcie || no_link)) {
497 for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) {
498 struct resource *res = bus->resource[i];
499 struct resource *par;
500
501 if (!res)
502 continue;
503 if (i == 0)
504 par = &hose->io_resource;
505 else if (i < 4)
506 par = &hose->mem_resources[i-1];
507 else par = NULL;
508
509 res->start = par ? par->start : 0;
510 res->end = par ? par->end : 0;
511 res->flags = par ? par->flags : 0;
512 }
513 }
514 }
515
fsl_add_bridge(struct platform_device * pdev,int is_primary)516 int fsl_add_bridge(struct platform_device *pdev, int is_primary)
517 {
518 int len;
519 struct pci_controller *hose;
520 struct resource rsrc;
521 const int *bus_range;
522 u8 hdr_type, progif;
523 struct device_node *dev;
524 struct ccsr_pci __iomem *pci;
525 u16 temp;
526 u32 svr = mfspr(SPRN_SVR);
527
528 dev = pdev->dev.of_node;
529
530 if (!of_device_is_available(dev)) {
531 pr_warn("%pOF: disabled\n", dev);
532 return -ENODEV;
533 }
534
535 pr_debug("Adding PCI host bridge %pOF\n", dev);
536
537 /* Fetch host bridge registers address */
538 if (of_address_to_resource(dev, 0, &rsrc)) {
539 printk(KERN_WARNING "Can't get pci register base!");
540 return -ENOMEM;
541 }
542
543 /* Get bus range if any */
544 bus_range = of_get_property(dev, "bus-range", &len);
545 if (bus_range == NULL || len < 2 * sizeof(int))
546 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
547 " bus 0\n", dev);
548
549 pci_add_flags(PCI_REASSIGN_ALL_BUS);
550 hose = pcibios_alloc_controller(dev);
551 if (!hose)
552 return -ENOMEM;
553
554 /* set platform device as the parent */
555 hose->parent = &pdev->dev;
556 hose->first_busno = bus_range ? bus_range[0] : 0x0;
557 hose->last_busno = bus_range ? bus_range[1] : 0xff;
558
559 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
560 (u64)rsrc.start, (u64)resource_size(&rsrc));
561
562 pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc));
563 if (!hose->private_data)
564 goto no_bridge;
565
566 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
567 PPC_INDIRECT_TYPE_BIG_ENDIAN);
568
569 if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0)
570 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
571
572 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
573 /* use fsl_indirect_read_config for PCIe */
574 hose->ops = &fsl_indirect_pcie_ops;
575 /* For PCIE read HEADER_TYPE to identify controller mode */
576 early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type);
577 if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE)
578 goto no_bridge;
579
580 } else {
581 /* For PCI read PROG to identify controller mode */
582 early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif);
583 if ((progif & 1) &&
584 !of_property_read_bool(dev, "fsl,pci-agent-force-enum"))
585 goto no_bridge;
586 }
587
588 setup_pci_cmd(hose);
589
590 /* check PCI express link status */
591 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
592 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
593 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
594 if (fsl_pcie_check_link(hose))
595 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
596 } else {
597 /*
598 * Set PBFR(PCI Bus Function Register)[10] = 1 to
599 * disable the combining of crossing cacheline
600 * boundary requests into one burst transaction.
601 * PCI-X operation is not affected.
602 * Fix erratum PCI 5 on MPC8548
603 */
604 #define PCI_BUS_FUNCTION 0x44
605 #define PCI_BUS_FUNCTION_MDS 0x400 /* Master disable streaming */
606 if (((SVR_SOC_VER(svr) == SVR_8543) ||
607 (SVR_SOC_VER(svr) == SVR_8545) ||
608 (SVR_SOC_VER(svr) == SVR_8547) ||
609 (SVR_SOC_VER(svr) == SVR_8548)) &&
610 !early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX)) {
611 early_read_config_word(hose, 0, 0,
612 PCI_BUS_FUNCTION, &temp);
613 temp |= PCI_BUS_FUNCTION_MDS;
614 early_write_config_word(hose, 0, 0,
615 PCI_BUS_FUNCTION, temp);
616 }
617 }
618
619 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
620 "Firmware bus number: %d->%d\n",
621 (unsigned long long)rsrc.start, hose->first_busno,
622 hose->last_busno);
623
624 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
625 hose, hose->cfg_addr, hose->cfg_data);
626
627 /* Interpret the "ranges" property */
628 /* This also maps the I/O region and sets isa_io/mem_base */
629 pci_process_bridge_OF_ranges(hose, dev, is_primary);
630
631 /* Setup PEX window registers */
632 setup_pci_atmu(hose);
633
634 /* Set up controller operations */
635 setup_swiotlb_ops(hose);
636
637 return 0;
638
639 no_bridge:
640 iounmap(hose->private_data);
641 /* unmap cfg_data & cfg_addr separately if not on same page */
642 if (((unsigned long)hose->cfg_data & PAGE_MASK) !=
643 ((unsigned long)hose->cfg_addr & PAGE_MASK))
644 iounmap(hose->cfg_data);
645 iounmap(hose->cfg_addr);
646 pcibios_free_controller(hose);
647 return -ENODEV;
648 }
649 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
650
651 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID,
652 quirk_fsl_pcie_early);
653
654 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
655 struct mpc83xx_pcie_priv {
656 void __iomem *cfg_type0;
657 void __iomem *cfg_type1;
658 u32 dev_base;
659 };
660
661 struct pex_inbound_window {
662 u32 ar;
663 u32 tar;
664 u32 barl;
665 u32 barh;
666 };
667
668 /*
669 * With the convention of u-boot, the PCIE outbound window 0 serves
670 * as configuration transactions outbound.
671 */
672 #define PEX_OUTWIN0_BAR 0xCA4
673 #define PEX_OUTWIN0_TAL 0xCA8
674 #define PEX_OUTWIN0_TAH 0xCAC
675 #define PEX_RC_INWIN_BASE 0xE60
676 #define PEX_RCIWARn_EN 0x1
677
mpc83xx_pcie_exclude_device(struct pci_bus * bus,unsigned int devfn)678 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
679 {
680 struct pci_controller *hose = pci_bus_to_host(bus);
681
682 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
683 return PCIBIOS_DEVICE_NOT_FOUND;
684 /*
685 * Workaround for the HW bug: for Type 0 configure transactions the
686 * PCI-E controller does not check the device number bits and just
687 * assumes that the device number bits are 0.
688 */
689 if (bus->number == hose->first_busno ||
690 bus->primary == hose->first_busno) {
691 if (devfn & 0xf8)
692 return PCIBIOS_DEVICE_NOT_FOUND;
693 }
694
695 if (ppc_md.pci_exclude_device) {
696 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
697 return PCIBIOS_DEVICE_NOT_FOUND;
698 }
699
700 return PCIBIOS_SUCCESSFUL;
701 }
702
mpc83xx_pcie_remap_cfg(struct pci_bus * bus,unsigned int devfn,int offset)703 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
704 unsigned int devfn, int offset)
705 {
706 struct pci_controller *hose = pci_bus_to_host(bus);
707 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
708 u32 dev_base = bus->number << 24 | devfn << 16;
709 int ret;
710
711 ret = mpc83xx_pcie_exclude_device(bus, devfn);
712 if (ret)
713 return NULL;
714
715 offset &= 0xfff;
716
717 /* Type 0 */
718 if (bus->number == hose->first_busno)
719 return pcie->cfg_type0 + offset;
720
721 if (pcie->dev_base == dev_base)
722 goto mapped;
723
724 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
725
726 pcie->dev_base = dev_base;
727 mapped:
728 return pcie->cfg_type1 + offset;
729 }
730
mpc83xx_pcie_write_config(struct pci_bus * bus,unsigned int devfn,int offset,int len,u32 val)731 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
732 int offset, int len, u32 val)
733 {
734 struct pci_controller *hose = pci_bus_to_host(bus);
735
736 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
737 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
738 val &= 0xffffff00;
739
740 return pci_generic_config_write(bus, devfn, offset, len, val);
741 }
742
743 static struct pci_ops mpc83xx_pcie_ops = {
744 .map_bus = mpc83xx_pcie_remap_cfg,
745 .read = pci_generic_config_read,
746 .write = mpc83xx_pcie_write_config,
747 };
748
mpc83xx_pcie_setup(struct pci_controller * hose,struct resource * reg)749 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
750 struct resource *reg)
751 {
752 struct mpc83xx_pcie_priv *pcie;
753 u32 cfg_bar;
754 int ret = -ENOMEM;
755
756 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
757 if (!pcie)
758 return ret;
759
760 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
761 if (!pcie->cfg_type0)
762 goto err0;
763
764 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
765 if (!cfg_bar) {
766 /* PCI-E isn't configured. */
767 ret = -ENODEV;
768 goto err1;
769 }
770
771 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
772 if (!pcie->cfg_type1)
773 goto err1;
774
775 WARN_ON(hose->dn->data);
776 hose->dn->data = pcie;
777 hose->ops = &mpc83xx_pcie_ops;
778 hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK;
779
780 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
781 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
782
783 if (fsl_pcie_check_link(hose))
784 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
785
786 return 0;
787 err1:
788 iounmap(pcie->cfg_type0);
789 err0:
790 kfree(pcie);
791 return ret;
792
793 }
794
mpc83xx_add_bridge(struct device_node * dev)795 int __init mpc83xx_add_bridge(struct device_node *dev)
796 {
797 int ret;
798 int len;
799 struct pci_controller *hose;
800 struct resource rsrc_reg;
801 struct resource rsrc_cfg;
802 const int *bus_range;
803 int primary;
804
805 is_mpc83xx_pci = 1;
806
807 if (!of_device_is_available(dev)) {
808 pr_warn("%pOF: disabled by the firmware.\n",
809 dev);
810 return -ENODEV;
811 }
812 pr_debug("Adding PCI host bridge %pOF\n", dev);
813
814 /* Fetch host bridge registers address */
815 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
816 printk(KERN_WARNING "Can't get pci register base!\n");
817 return -ENOMEM;
818 }
819
820 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
821
822 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
823 printk(KERN_WARNING
824 "No pci config register base in dev tree, "
825 "using default\n");
826 /*
827 * MPC83xx supports up to two host controllers
828 * one at 0x8500 has config space registers at 0x8300
829 * one at 0x8600 has config space registers at 0x8380
830 */
831 if ((rsrc_reg.start & 0xfffff) == 0x8500)
832 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
833 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
834 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
835 }
836 /*
837 * Controller at offset 0x8500 is primary
838 */
839 if ((rsrc_reg.start & 0xfffff) == 0x8500)
840 primary = 1;
841 else
842 primary = 0;
843
844 /* Get bus range if any */
845 bus_range = of_get_property(dev, "bus-range", &len);
846 if (bus_range == NULL || len < 2 * sizeof(int)) {
847 printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
848 " bus 0\n", dev);
849 }
850
851 pci_add_flags(PCI_REASSIGN_ALL_BUS);
852 hose = pcibios_alloc_controller(dev);
853 if (!hose)
854 return -ENOMEM;
855
856 hose->first_busno = bus_range ? bus_range[0] : 0;
857 hose->last_busno = bus_range ? bus_range[1] : 0xff;
858
859 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
860 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
861 if (ret)
862 goto err0;
863 } else {
864 setup_indirect_pci(hose, rsrc_cfg.start,
865 rsrc_cfg.start + 4, 0);
866 }
867
868 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
869 "Firmware bus number: %d->%d\n",
870 (unsigned long long)rsrc_reg.start, hose->first_busno,
871 hose->last_busno);
872
873 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
874 hose, hose->cfg_addr, hose->cfg_data);
875
876 /* Interpret the "ranges" property */
877 /* This also maps the I/O region and sets isa_io/mem_base */
878 pci_process_bridge_OF_ranges(hose, dev, primary);
879
880 return 0;
881 err0:
882 pcibios_free_controller(hose);
883 return ret;
884 }
885 #endif /* CONFIG_PPC_83xx */
886
fsl_pci_immrbar_base(struct pci_controller * hose)887 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
888 {
889 #ifdef CONFIG_PPC_83xx
890 if (is_mpc83xx_pci) {
891 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
892 struct pex_inbound_window *in;
893 int i;
894
895 /* Walk the Root Complex Inbound windows to match IMMR base */
896 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
897 for (i = 0; i < 4; i++) {
898 /* not enabled, skip */
899 if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN))
900 continue;
901
902 if (get_immrbase() == in_le32(&in[i].tar))
903 return (u64)in_le32(&in[i].barh) << 32 |
904 in_le32(&in[i].barl);
905 }
906
907 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
908 }
909 #endif
910
911 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
912 if (!is_mpc83xx_pci) {
913 u32 base;
914
915 pci_bus_read_config_dword(hose->bus,
916 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
917
918 /*
919 * For PEXCSRBAR, bit 3-0 indicate prefetchable and
920 * address type. So when getting base address, these
921 * bits should be masked
922 */
923 base &= PCI_BASE_ADDRESS_MEM_MASK;
924
925 return base;
926 }
927 #endif
928
929 return 0;
930 }
931
932 #ifdef CONFIG_E500
mcheck_handle_load(struct pt_regs * regs,u32 inst)933 static int mcheck_handle_load(struct pt_regs *regs, u32 inst)
934 {
935 unsigned int rd, ra, rb, d;
936
937 rd = get_rt(inst);
938 ra = get_ra(inst);
939 rb = get_rb(inst);
940 d = get_d(inst);
941
942 switch (get_op(inst)) {
943 case 31:
944 switch (get_xop(inst)) {
945 case OP_31_XOP_LWZX:
946 case OP_31_XOP_LWBRX:
947 regs->gpr[rd] = 0xffffffff;
948 break;
949
950 case OP_31_XOP_LWZUX:
951 regs->gpr[rd] = 0xffffffff;
952 regs->gpr[ra] += regs->gpr[rb];
953 break;
954
955 case OP_31_XOP_LBZX:
956 regs->gpr[rd] = 0xff;
957 break;
958
959 case OP_31_XOP_LBZUX:
960 regs->gpr[rd] = 0xff;
961 regs->gpr[ra] += regs->gpr[rb];
962 break;
963
964 case OP_31_XOP_LHZX:
965 case OP_31_XOP_LHBRX:
966 regs->gpr[rd] = 0xffff;
967 break;
968
969 case OP_31_XOP_LHZUX:
970 regs->gpr[rd] = 0xffff;
971 regs->gpr[ra] += regs->gpr[rb];
972 break;
973
974 case OP_31_XOP_LHAX:
975 regs->gpr[rd] = ~0UL;
976 break;
977
978 case OP_31_XOP_LHAUX:
979 regs->gpr[rd] = ~0UL;
980 regs->gpr[ra] += regs->gpr[rb];
981 break;
982
983 default:
984 return 0;
985 }
986 break;
987
988 case OP_LWZ:
989 regs->gpr[rd] = 0xffffffff;
990 break;
991
992 case OP_LWZU:
993 regs->gpr[rd] = 0xffffffff;
994 regs->gpr[ra] += (s16)d;
995 break;
996
997 case OP_LBZ:
998 regs->gpr[rd] = 0xff;
999 break;
1000
1001 case OP_LBZU:
1002 regs->gpr[rd] = 0xff;
1003 regs->gpr[ra] += (s16)d;
1004 break;
1005
1006 case OP_LHZ:
1007 regs->gpr[rd] = 0xffff;
1008 break;
1009
1010 case OP_LHZU:
1011 regs->gpr[rd] = 0xffff;
1012 regs->gpr[ra] += (s16)d;
1013 break;
1014
1015 case OP_LHA:
1016 regs->gpr[rd] = ~0UL;
1017 break;
1018
1019 case OP_LHAU:
1020 regs->gpr[rd] = ~0UL;
1021 regs->gpr[ra] += (s16)d;
1022 break;
1023
1024 default:
1025 return 0;
1026 }
1027
1028 return 1;
1029 }
1030
is_in_pci_mem_space(phys_addr_t addr)1031 static int is_in_pci_mem_space(phys_addr_t addr)
1032 {
1033 struct pci_controller *hose;
1034 struct resource *res;
1035 int i;
1036
1037 list_for_each_entry(hose, &hose_list, list_node) {
1038 if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG))
1039 continue;
1040
1041 for (i = 0; i < 3; i++) {
1042 res = &hose->mem_resources[i];
1043 if ((res->flags & IORESOURCE_MEM) &&
1044 addr >= res->start && addr <= res->end)
1045 return 1;
1046 }
1047 }
1048 return 0;
1049 }
1050
fsl_pci_mcheck_exception(struct pt_regs * regs)1051 int fsl_pci_mcheck_exception(struct pt_regs *regs)
1052 {
1053 u32 inst;
1054 int ret;
1055 phys_addr_t addr = 0;
1056
1057 /* Let KVM/QEMU deal with the exception */
1058 if (regs->msr & MSR_GS)
1059 return 0;
1060
1061 #ifdef CONFIG_PHYS_64BIT
1062 addr = mfspr(SPRN_MCARU);
1063 addr <<= 32;
1064 #endif
1065 addr += mfspr(SPRN_MCAR);
1066
1067 if (is_in_pci_mem_space(addr)) {
1068 if (user_mode(regs))
1069 ret = copy_from_user_nofault(&inst,
1070 (void __user *)regs->nip, sizeof(inst));
1071 else
1072 ret = get_kernel_nofault(inst, (void *)regs->nip);
1073
1074 if (!ret && mcheck_handle_load(regs, inst)) {
1075 regs->nip += 4;
1076 return 1;
1077 }
1078 }
1079
1080 return 0;
1081 }
1082 #endif
1083
1084 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
1085 static const struct of_device_id pci_ids[] = {
1086 { .compatible = "fsl,mpc8540-pci", },
1087 { .compatible = "fsl,mpc8548-pcie", },
1088 { .compatible = "fsl,mpc8610-pci", },
1089 { .compatible = "fsl,mpc8641-pcie", },
1090 { .compatible = "fsl,qoriq-pcie", },
1091 { .compatible = "fsl,qoriq-pcie-v2.1", },
1092 { .compatible = "fsl,qoriq-pcie-v2.2", },
1093 { .compatible = "fsl,qoriq-pcie-v2.3", },
1094 { .compatible = "fsl,qoriq-pcie-v2.4", },
1095 { .compatible = "fsl,qoriq-pcie-v3.0", },
1096
1097 /*
1098 * The following entries are for compatibility with older device
1099 * trees.
1100 */
1101 { .compatible = "fsl,p1022-pcie", },
1102 { .compatible = "fsl,p4080-pcie", },
1103
1104 {},
1105 };
1106
1107 struct device_node *fsl_pci_primary;
1108
fsl_pci_assign_primary(void)1109 void fsl_pci_assign_primary(void)
1110 {
1111 struct device_node *np;
1112
1113 /* Callers can specify the primary bus using other means. */
1114 if (fsl_pci_primary)
1115 return;
1116
1117 /* If a PCI host bridge contains an ISA node, it's primary. */
1118 np = of_find_node_by_type(NULL, "isa");
1119 while ((fsl_pci_primary = of_get_parent(np))) {
1120 of_node_put(np);
1121 np = fsl_pci_primary;
1122
1123 if (of_match_node(pci_ids, np) && of_device_is_available(np))
1124 return;
1125 }
1126
1127 /*
1128 * If there's no PCI host bridge with ISA, arbitrarily
1129 * designate one as primary. This can go away once
1130 * various bugs with primary-less systems are fixed.
1131 */
1132 for_each_matching_node(np, pci_ids) {
1133 if (of_device_is_available(np)) {
1134 fsl_pci_primary = np;
1135 of_node_put(np);
1136 return;
1137 }
1138 }
1139 }
1140
1141 #ifdef CONFIG_PM_SLEEP
fsl_pci_pme_handle(int irq,void * dev_id)1142 static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id)
1143 {
1144 struct pci_controller *hose = dev_id;
1145 struct ccsr_pci __iomem *pci = hose->private_data;
1146 u32 dr;
1147
1148 dr = in_be32(&pci->pex_pme_mes_dr);
1149 if (!dr)
1150 return IRQ_NONE;
1151
1152 out_be32(&pci->pex_pme_mes_dr, dr);
1153
1154 return IRQ_HANDLED;
1155 }
1156
fsl_pci_pme_probe(struct pci_controller * hose)1157 static int fsl_pci_pme_probe(struct pci_controller *hose)
1158 {
1159 struct ccsr_pci __iomem *pci;
1160 struct pci_dev *dev;
1161 int pme_irq;
1162 int res;
1163 u16 pms;
1164
1165 /* Get hose's pci_dev */
1166 dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list);
1167
1168 /* PME Disable */
1169 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1170 pms &= ~PCI_PM_CTRL_PME_ENABLE;
1171 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1172
1173 pme_irq = irq_of_parse_and_map(hose->dn, 0);
1174 if (!pme_irq) {
1175 dev_err(&dev->dev, "Failed to map PME interrupt.\n");
1176
1177 return -ENXIO;
1178 }
1179
1180 res = devm_request_irq(hose->parent, pme_irq,
1181 fsl_pci_pme_handle,
1182 IRQF_SHARED,
1183 "[PCI] PME", hose);
1184 if (res < 0) {
1185 dev_err(&dev->dev, "Unable to request irq %d for PME\n", pme_irq);
1186 irq_dispose_mapping(pme_irq);
1187
1188 return -ENODEV;
1189 }
1190
1191 pci = hose->private_data;
1192
1193 /* Enable PTOD, ENL23D & EXL23D */
1194 clrbits32(&pci->pex_pme_mes_disr,
1195 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1196
1197 out_be32(&pci->pex_pme_mes_ier, 0);
1198 setbits32(&pci->pex_pme_mes_ier,
1199 PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D);
1200
1201 /* PME Enable */
1202 pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms);
1203 pms |= PCI_PM_CTRL_PME_ENABLE;
1204 pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms);
1205
1206 return 0;
1207 }
1208
send_pme_turnoff_message(struct pci_controller * hose)1209 static void send_pme_turnoff_message(struct pci_controller *hose)
1210 {
1211 struct ccsr_pci __iomem *pci = hose->private_data;
1212 u32 dr;
1213 int i;
1214
1215 /* Send PME_Turn_Off Message Request */
1216 setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR);
1217
1218 /* Wait trun off done */
1219 for (i = 0; i < 150; i++) {
1220 dr = in_be32(&pci->pex_pme_mes_dr);
1221 if (dr) {
1222 out_be32(&pci->pex_pme_mes_dr, dr);
1223 break;
1224 }
1225
1226 udelay(1000);
1227 }
1228 }
1229
fsl_pci_syscore_do_suspend(struct pci_controller * hose)1230 static void fsl_pci_syscore_do_suspend(struct pci_controller *hose)
1231 {
1232 send_pme_turnoff_message(hose);
1233 }
1234
fsl_pci_syscore_suspend(void)1235 static int fsl_pci_syscore_suspend(void)
1236 {
1237 struct pci_controller *hose, *tmp;
1238
1239 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1240 fsl_pci_syscore_do_suspend(hose);
1241
1242 return 0;
1243 }
1244
fsl_pci_syscore_do_resume(struct pci_controller * hose)1245 static void fsl_pci_syscore_do_resume(struct pci_controller *hose)
1246 {
1247 struct ccsr_pci __iomem *pci = hose->private_data;
1248 u32 dr;
1249 int i;
1250
1251 /* Send Exit L2 State Message */
1252 setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S);
1253
1254 /* Wait exit done */
1255 for (i = 0; i < 150; i++) {
1256 dr = in_be32(&pci->pex_pme_mes_dr);
1257 if (dr) {
1258 out_be32(&pci->pex_pme_mes_dr, dr);
1259 break;
1260 }
1261
1262 udelay(1000);
1263 }
1264
1265 setup_pci_atmu(hose);
1266 }
1267
fsl_pci_syscore_resume(void)1268 static void fsl_pci_syscore_resume(void)
1269 {
1270 struct pci_controller *hose, *tmp;
1271
1272 list_for_each_entry_safe(hose, tmp, &hose_list, list_node)
1273 fsl_pci_syscore_do_resume(hose);
1274 }
1275
1276 static struct syscore_ops pci_syscore_pm_ops = {
1277 .suspend = fsl_pci_syscore_suspend,
1278 .resume = fsl_pci_syscore_resume,
1279 };
1280 #endif
1281
fsl_pcibios_fixup_phb(struct pci_controller * phb)1282 void fsl_pcibios_fixup_phb(struct pci_controller *phb)
1283 {
1284 #ifdef CONFIG_PM_SLEEP
1285 fsl_pci_pme_probe(phb);
1286 #endif
1287 }
1288
add_err_dev(struct platform_device * pdev)1289 static int add_err_dev(struct platform_device *pdev)
1290 {
1291 struct platform_device *errdev;
1292 struct mpc85xx_edac_pci_plat_data pd = {
1293 .of_node = pdev->dev.of_node
1294 };
1295
1296 errdev = platform_device_register_resndata(&pdev->dev,
1297 "mpc85xx-pci-edac",
1298 PLATFORM_DEVID_AUTO,
1299 pdev->resource,
1300 pdev->num_resources,
1301 &pd, sizeof(pd));
1302
1303 return PTR_ERR_OR_ZERO(errdev);
1304 }
1305
fsl_pci_probe(struct platform_device * pdev)1306 static int fsl_pci_probe(struct platform_device *pdev)
1307 {
1308 struct device_node *node;
1309 int ret;
1310
1311 node = pdev->dev.of_node;
1312 ret = fsl_add_bridge(pdev, fsl_pci_primary == node);
1313 if (ret)
1314 return ret;
1315
1316 ret = add_err_dev(pdev);
1317 if (ret)
1318 dev_err(&pdev->dev, "couldn't register error device: %d\n",
1319 ret);
1320
1321 return 0;
1322 }
1323
1324 static struct platform_driver fsl_pci_driver = {
1325 .driver = {
1326 .name = "fsl-pci",
1327 .of_match_table = pci_ids,
1328 },
1329 .probe = fsl_pci_probe,
1330 };
1331
fsl_pci_init(void)1332 static int __init fsl_pci_init(void)
1333 {
1334 #ifdef CONFIG_PM_SLEEP
1335 register_syscore_ops(&pci_syscore_pm_ops);
1336 #endif
1337 return platform_driver_register(&fsl_pci_driver);
1338 }
1339 arch_initcall(fsl_pci_init);
1340 #endif
1341
