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5738ec6d BH |
1 | /* |
2 | * PCI / PCI-X / PCI-Express support for 4xx parts | |
3 | * | |
4 | * Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp. | |
5 | * | |
a2d2e1ec BH |
6 | * Most PCI Express code is coming from Stefan Roese implementation for |
7 | * arch/ppc in the Denx tree, slightly reworked by me. | |
8 | * | |
9 | * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de> | |
10 | * | |
11 | * Some of that comes itself from a previous implementation for 440SPE only | |
12 | * by Roland Dreier: | |
13 | * | |
14 | * Copyright (c) 2005 Cisco Systems. All rights reserved. | |
15 | * Roland Dreier <rolandd@cisco.com> | |
16 | * | |
5738ec6d BH |
17 | */ |
18 | ||
035ee428 BH |
19 | #undef DEBUG |
20 | ||
5738ec6d BH |
21 | #include <linux/kernel.h> |
22 | #include <linux/pci.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/of.h> | |
a2d2e1ec BH |
25 | #include <linux/bootmem.h> |
26 | #include <linux/delay.h> | |
5738ec6d BH |
27 | |
28 | #include <asm/io.h> | |
29 | #include <asm/pci-bridge.h> | |
30 | #include <asm/machdep.h> | |
a2d2e1ec BH |
31 | #include <asm/dcr.h> |
32 | #include <asm/dcr-regs.h> | |
cc2e113b | 33 | #include <mm/mmu_decl.h> |
5738ec6d BH |
34 | |
35 | #include "ppc4xx_pci.h" | |
36 | ||
37 | static int dma_offset_set; | |
38 | ||
a2d2e1ec BH |
39 | #define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL)) |
40 | #define U64_TO_U32_HIGH(val) ((u32)((val) >> 32)) | |
41 | ||
8308c54d JF |
42 | #define RES_TO_U32_LOW(val) \ |
43 | ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val)) | |
44 | #define RES_TO_U32_HIGH(val) \ | |
45 | ((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0)) | |
a2d2e1ec | 46 | |
accf5ef2 SR |
47 | static inline int ppc440spe_revA(void) |
48 | { | |
49 | /* Catch both 440SPe variants, with and without RAID6 support */ | |
50 | if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890) | |
51 | return 1; | |
52 | else | |
53 | return 0; | |
54 | } | |
55 | ||
c839e0ef BH |
56 | static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev) |
57 | { | |
58 | struct pci_controller *hose; | |
59 | int i; | |
60 | ||
61 | if (dev->devfn != 0 || dev->bus->self != NULL) | |
62 | return; | |
63 | ||
64 | hose = pci_bus_to_host(dev->bus); | |
65 | if (hose == NULL) | |
66 | return; | |
67 | ||
68 | if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") && | |
69 | !of_device_is_compatible(hose->dn, "ibm,plb-pcix") && | |
70 | !of_device_is_compatible(hose->dn, "ibm,plb-pci")) | |
71 | return; | |
72 | ||
5ce4b596 JB |
73 | if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") || |
74 | of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) { | |
75 | hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM; | |
76 | } | |
77 | ||
c839e0ef BH |
78 | /* Hide the PCI host BARs from the kernel as their content doesn't |
79 | * fit well in the resource management | |
80 | */ | |
81 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
82 | dev->resource[i].start = dev->resource[i].end = 0; | |
83 | dev->resource[i].flags = 0; | |
84 | } | |
85 | ||
86 | printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n", | |
87 | pci_name(dev)); | |
88 | } | |
89 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge); | |
90 | ||
5738ec6d BH |
91 | static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose, |
92 | void __iomem *reg, | |
93 | struct resource *res) | |
94 | { | |
95 | u64 size; | |
96 | const u32 *ranges; | |
97 | int rlen; | |
98 | int pna = of_n_addr_cells(hose->dn); | |
99 | int np = pna + 5; | |
100 | ||
101 | /* Default */ | |
102 | res->start = 0; | |
cc2e113b IY |
103 | size = 0x80000000; |
104 | res->end = size - 1; | |
5738ec6d BH |
105 | res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH; |
106 | ||
107 | /* Get dma-ranges property */ | |
108 | ranges = of_get_property(hose->dn, "dma-ranges", &rlen); | |
109 | if (ranges == NULL) | |
110 | goto out; | |
111 | ||
112 | /* Walk it */ | |
113 | while ((rlen -= np * 4) >= 0) { | |
114 | u32 pci_space = ranges[0]; | |
115 | u64 pci_addr = of_read_number(ranges + 1, 2); | |
116 | u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3); | |
117 | size = of_read_number(ranges + pna + 3, 2); | |
118 | ranges += np; | |
119 | if (cpu_addr == OF_BAD_ADDR || size == 0) | |
120 | continue; | |
121 | ||
122 | /* We only care about memory */ | |
123 | if ((pci_space & 0x03000000) != 0x02000000) | |
124 | continue; | |
125 | ||
126 | /* We currently only support memory at 0, and pci_addr | |
127 | * within 32 bits space | |
128 | */ | |
129 | if (cpu_addr != 0 || pci_addr > 0xffffffff) { | |
130 | printk(KERN_WARNING "%s: Ignored unsupported dma range" | |
131 | " 0x%016llx...0x%016llx -> 0x%016llx\n", | |
132 | hose->dn->full_name, | |
133 | pci_addr, pci_addr + size - 1, cpu_addr); | |
134 | continue; | |
135 | } | |
136 | ||
137 | /* Check if not prefetchable */ | |
138 | if (!(pci_space & 0x40000000)) | |
139 | res->flags &= ~IORESOURCE_PREFETCH; | |
140 | ||
141 | ||
142 | /* Use that */ | |
143 | res->start = pci_addr; | |
5738ec6d | 144 | /* Beware of 32 bits resources */ |
8308c54d JF |
145 | if (sizeof(resource_size_t) == sizeof(u32) && |
146 | (pci_addr + size) > 0x100000000ull) | |
5738ec6d BH |
147 | res->end = 0xffffffff; |
148 | else | |
5738ec6d BH |
149 | res->end = res->start + size - 1; |
150 | break; | |
151 | } | |
152 | ||
153 | /* We only support one global DMA offset */ | |
154 | if (dma_offset_set && pci_dram_offset != res->start) { | |
155 | printk(KERN_ERR "%s: dma-ranges(s) mismatch\n", | |
156 | hose->dn->full_name); | |
157 | return -ENXIO; | |
158 | } | |
159 | ||
160 | /* Check that we can fit all of memory as we don't support | |
161 | * DMA bounce buffers | |
162 | */ | |
163 | if (size < total_memory) { | |
164 | printk(KERN_ERR "%s: dma-ranges too small " | |
cc2e113b IY |
165 | "(size=%llx total_memory=%llx)\n", |
166 | hose->dn->full_name, size, (u64)total_memory); | |
5738ec6d BH |
167 | return -ENXIO; |
168 | } | |
169 | ||
170 | /* Check we are a power of 2 size and that base is a multiple of size*/ | |
cc2e113b | 171 | if ((size & (size - 1)) != 0 || |
5738ec6d BH |
172 | (res->start & (size - 1)) != 0) { |
173 | printk(KERN_ERR "%s: dma-ranges unaligned\n", | |
174 | hose->dn->full_name); | |
175 | return -ENXIO; | |
176 | } | |
177 | ||
178 | /* Check that we are fully contained within 32 bits space */ | |
179 | if (res->end > 0xffffffff) { | |
180 | printk(KERN_ERR "%s: dma-ranges outside of 32 bits space\n", | |
181 | hose->dn->full_name); | |
182 | return -ENXIO; | |
183 | } | |
184 | out: | |
185 | dma_offset_set = 1; | |
186 | pci_dram_offset = res->start; | |
187 | ||
188 | printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n", | |
189 | pci_dram_offset); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /* | |
194 | * 4xx PCI 2.x part | |
195 | */ | |
c839e0ef BH |
196 | |
197 | static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose, | |
198 | void __iomem *reg) | |
199 | { | |
200 | u32 la, ma, pcila, pciha; | |
201 | int i, j; | |
202 | ||
203 | /* Setup outbound memory windows */ | |
204 | for (i = j = 0; i < 3; i++) { | |
205 | struct resource *res = &hose->mem_resources[i]; | |
206 | ||
207 | /* we only care about memory windows */ | |
208 | if (!(res->flags & IORESOURCE_MEM)) | |
209 | continue; | |
210 | if (j > 2) { | |
211 | printk(KERN_WARNING "%s: Too many ranges\n", | |
212 | hose->dn->full_name); | |
213 | break; | |
214 | } | |
215 | ||
216 | /* Calculate register values */ | |
217 | la = res->start; | |
a2d2e1ec BH |
218 | pciha = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset); |
219 | pcila = RES_TO_U32_LOW(res->start - hose->pci_mem_offset); | |
c839e0ef BH |
220 | |
221 | ma = res->end + 1 - res->start; | |
222 | if (!is_power_of_2(ma) || ma < 0x1000 || ma > 0xffffffffu) { | |
223 | printk(KERN_WARNING "%s: Resource out of range\n", | |
224 | hose->dn->full_name); | |
225 | continue; | |
226 | } | |
227 | ma = (0xffffffffu << ilog2(ma)) | 0x1; | |
228 | if (res->flags & IORESOURCE_PREFETCH) | |
229 | ma |= 0x2; | |
230 | ||
231 | /* Program register values */ | |
232 | writel(la, reg + PCIL0_PMM0LA + (0x10 * j)); | |
233 | writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * j)); | |
234 | writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * j)); | |
235 | writel(ma, reg + PCIL0_PMM0MA + (0x10 * j)); | |
236 | j++; | |
237 | } | |
238 | } | |
239 | ||
240 | static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose, | |
241 | void __iomem *reg, | |
242 | const struct resource *res) | |
243 | { | |
244 | resource_size_t size = res->end - res->start + 1; | |
245 | u32 sa; | |
246 | ||
247 | /* Calculate window size */ | |
248 | sa = (0xffffffffu << ilog2(size)) | 1; | |
249 | sa |= 0x1; | |
250 | ||
251 | /* RAM is always at 0 local for now */ | |
252 | writel(0, reg + PCIL0_PTM1LA); | |
253 | writel(sa, reg + PCIL0_PTM1MS); | |
254 | ||
255 | /* Map on PCI side */ | |
256 | early_write_config_dword(hose, hose->first_busno, 0, | |
257 | PCI_BASE_ADDRESS_1, res->start); | |
258 | early_write_config_dword(hose, hose->first_busno, 0, | |
259 | PCI_BASE_ADDRESS_2, 0x00000000); | |
260 | early_write_config_word(hose, hose->first_busno, 0, | |
261 | PCI_COMMAND, 0x0006); | |
262 | } | |
263 | ||
5738ec6d BH |
264 | static void __init ppc4xx_probe_pci_bridge(struct device_node *np) |
265 | { | |
266 | /* NYI */ | |
c839e0ef BH |
267 | struct resource rsrc_cfg; |
268 | struct resource rsrc_reg; | |
269 | struct resource dma_window; | |
270 | struct pci_controller *hose = NULL; | |
271 | void __iomem *reg = NULL; | |
272 | const int *bus_range; | |
273 | int primary = 0; | |
274 | ||
5a013fc7 MF |
275 | /* Check if device is enabled */ |
276 | if (!of_device_is_available(np)) { | |
277 | printk(KERN_INFO "%s: Port disabled via device-tree\n", | |
278 | np->full_name); | |
279 | return; | |
280 | } | |
281 | ||
c839e0ef BH |
282 | /* Fetch config space registers address */ |
283 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { | |
5a013fc7 | 284 | printk(KERN_ERR "%s: Can't get PCI config register base !", |
c839e0ef BH |
285 | np->full_name); |
286 | return; | |
287 | } | |
288 | /* Fetch host bridge internal registers address */ | |
289 | if (of_address_to_resource(np, 3, &rsrc_reg)) { | |
290 | printk(KERN_ERR "%s: Can't get PCI internal register base !", | |
291 | np->full_name); | |
292 | return; | |
293 | } | |
294 | ||
295 | /* Check if primary bridge */ | |
296 | if (of_get_property(np, "primary", NULL)) | |
297 | primary = 1; | |
298 | ||
299 | /* Get bus range if any */ | |
300 | bus_range = of_get_property(np, "bus-range", NULL); | |
301 | ||
302 | /* Map registers */ | |
303 | reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start); | |
304 | if (reg == NULL) { | |
305 | printk(KERN_ERR "%s: Can't map registers !", np->full_name); | |
306 | goto fail; | |
307 | } | |
308 | ||
309 | /* Allocate the host controller data structure */ | |
310 | hose = pcibios_alloc_controller(np); | |
311 | if (!hose) | |
312 | goto fail; | |
313 | ||
314 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
315 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
316 | ||
317 | /* Setup config space */ | |
318 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); | |
319 | ||
320 | /* Disable all windows */ | |
321 | writel(0, reg + PCIL0_PMM0MA); | |
322 | writel(0, reg + PCIL0_PMM1MA); | |
323 | writel(0, reg + PCIL0_PMM2MA); | |
324 | writel(0, reg + PCIL0_PTM1MS); | |
325 | writel(0, reg + PCIL0_PTM2MS); | |
326 | ||
327 | /* Parse outbound mapping resources */ | |
328 | pci_process_bridge_OF_ranges(hose, np, primary); | |
329 | ||
330 | /* Parse inbound mapping resources */ | |
331 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) | |
332 | goto fail; | |
333 | ||
334 | /* Configure outbound ranges POMs */ | |
335 | ppc4xx_configure_pci_PMMs(hose, reg); | |
336 | ||
337 | /* Configure inbound ranges PIMs */ | |
338 | ppc4xx_configure_pci_PTMs(hose, reg, &dma_window); | |
339 | ||
340 | /* We don't need the registers anymore */ | |
341 | iounmap(reg); | |
342 | return; | |
343 | ||
344 | fail: | |
345 | if (hose) | |
346 | pcibios_free_controller(hose); | |
347 | if (reg) | |
348 | iounmap(reg); | |
5738ec6d BH |
349 | } |
350 | ||
351 | /* | |
352 | * 4xx PCI-X part | |
353 | */ | |
354 | ||
355 | static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose, | |
356 | void __iomem *reg) | |
357 | { | |
358 | u32 lah, lal, pciah, pcial, sa; | |
359 | int i, j; | |
360 | ||
361 | /* Setup outbound memory windows */ | |
362 | for (i = j = 0; i < 3; i++) { | |
363 | struct resource *res = &hose->mem_resources[i]; | |
364 | ||
365 | /* we only care about memory windows */ | |
366 | if (!(res->flags & IORESOURCE_MEM)) | |
367 | continue; | |
368 | if (j > 1) { | |
369 | printk(KERN_WARNING "%s: Too many ranges\n", | |
370 | hose->dn->full_name); | |
371 | break; | |
372 | } | |
373 | ||
374 | /* Calculate register values */ | |
a2d2e1ec BH |
375 | lah = RES_TO_U32_HIGH(res->start); |
376 | lal = RES_TO_U32_LOW(res->start); | |
377 | pciah = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset); | |
378 | pcial = RES_TO_U32_LOW(res->start - hose->pci_mem_offset); | |
5738ec6d BH |
379 | sa = res->end + 1 - res->start; |
380 | if (!is_power_of_2(sa) || sa < 0x100000 || | |
381 | sa > 0xffffffffu) { | |
382 | printk(KERN_WARNING "%s: Resource out of range\n", | |
383 | hose->dn->full_name); | |
384 | continue; | |
385 | } | |
386 | sa = (0xffffffffu << ilog2(sa)) | 0x1; | |
387 | ||
388 | /* Program register values */ | |
389 | if (j == 0) { | |
390 | writel(lah, reg + PCIX0_POM0LAH); | |
391 | writel(lal, reg + PCIX0_POM0LAL); | |
392 | writel(pciah, reg + PCIX0_POM0PCIAH); | |
393 | writel(pcial, reg + PCIX0_POM0PCIAL); | |
394 | writel(sa, reg + PCIX0_POM0SA); | |
395 | } else { | |
396 | writel(lah, reg + PCIX0_POM1LAH); | |
397 | writel(lal, reg + PCIX0_POM1LAL); | |
398 | writel(pciah, reg + PCIX0_POM1PCIAH); | |
399 | writel(pcial, reg + PCIX0_POM1PCIAL); | |
400 | writel(sa, reg + PCIX0_POM1SA); | |
401 | } | |
402 | j++; | |
403 | } | |
404 | } | |
405 | ||
406 | static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose, | |
407 | void __iomem *reg, | |
408 | const struct resource *res, | |
409 | int big_pim, | |
410 | int enable_msi_hole) | |
411 | { | |
412 | resource_size_t size = res->end - res->start + 1; | |
413 | u32 sa; | |
414 | ||
415 | /* RAM is always at 0 */ | |
416 | writel(0x00000000, reg + PCIX0_PIM0LAH); | |
417 | writel(0x00000000, reg + PCIX0_PIM0LAL); | |
418 | ||
419 | /* Calculate window size */ | |
420 | sa = (0xffffffffu << ilog2(size)) | 1; | |
421 | sa |= 0x1; | |
422 | if (res->flags & IORESOURCE_PREFETCH) | |
423 | sa |= 0x2; | |
424 | if (enable_msi_hole) | |
425 | sa |= 0x4; | |
426 | writel(sa, reg + PCIX0_PIM0SA); | |
427 | if (big_pim) | |
428 | writel(0xffffffff, reg + PCIX0_PIM0SAH); | |
429 | ||
430 | /* Map on PCI side */ | |
431 | writel(0x00000000, reg + PCIX0_BAR0H); | |
432 | writel(res->start, reg + PCIX0_BAR0L); | |
433 | writew(0x0006, reg + PCIX0_COMMAND); | |
434 | } | |
435 | ||
436 | static void __init ppc4xx_probe_pcix_bridge(struct device_node *np) | |
437 | { | |
438 | struct resource rsrc_cfg; | |
439 | struct resource rsrc_reg; | |
440 | struct resource dma_window; | |
441 | struct pci_controller *hose = NULL; | |
442 | void __iomem *reg = NULL; | |
443 | const int *bus_range; | |
444 | int big_pim = 0, msi = 0, primary = 0; | |
445 | ||
446 | /* Fetch config space registers address */ | |
447 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { | |
448 | printk(KERN_ERR "%s:Can't get PCI-X config register base !", | |
449 | np->full_name); | |
450 | return; | |
451 | } | |
452 | /* Fetch host bridge internal registers address */ | |
453 | if (of_address_to_resource(np, 3, &rsrc_reg)) { | |
454 | printk(KERN_ERR "%s: Can't get PCI-X internal register base !", | |
455 | np->full_name); | |
456 | return; | |
457 | } | |
458 | ||
459 | /* Check if it supports large PIMs (440GX) */ | |
460 | if (of_get_property(np, "large-inbound-windows", NULL)) | |
461 | big_pim = 1; | |
462 | ||
463 | /* Check if we should enable MSIs inbound hole */ | |
464 | if (of_get_property(np, "enable-msi-hole", NULL)) | |
465 | msi = 1; | |
466 | ||
467 | /* Check if primary bridge */ | |
468 | if (of_get_property(np, "primary", NULL)) | |
469 | primary = 1; | |
470 | ||
471 | /* Get bus range if any */ | |
472 | bus_range = of_get_property(np, "bus-range", NULL); | |
473 | ||
474 | /* Map registers */ | |
475 | reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start); | |
476 | if (reg == NULL) { | |
477 | printk(KERN_ERR "%s: Can't map registers !", np->full_name); | |
478 | goto fail; | |
479 | } | |
480 | ||
481 | /* Allocate the host controller data structure */ | |
482 | hose = pcibios_alloc_controller(np); | |
483 | if (!hose) | |
484 | goto fail; | |
485 | ||
486 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
487 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
488 | ||
489 | /* Setup config space */ | |
490 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); | |
491 | ||
492 | /* Disable all windows */ | |
493 | writel(0, reg + PCIX0_POM0SA); | |
494 | writel(0, reg + PCIX0_POM1SA); | |
495 | writel(0, reg + PCIX0_POM2SA); | |
496 | writel(0, reg + PCIX0_PIM0SA); | |
497 | writel(0, reg + PCIX0_PIM1SA); | |
498 | writel(0, reg + PCIX0_PIM2SA); | |
499 | if (big_pim) { | |
500 | writel(0, reg + PCIX0_PIM0SAH); | |
501 | writel(0, reg + PCIX0_PIM2SAH); | |
502 | } | |
503 | ||
504 | /* Parse outbound mapping resources */ | |
505 | pci_process_bridge_OF_ranges(hose, np, primary); | |
506 | ||
507 | /* Parse inbound mapping resources */ | |
508 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) | |
509 | goto fail; | |
510 | ||
511 | /* Configure outbound ranges POMs */ | |
512 | ppc4xx_configure_pcix_POMs(hose, reg); | |
513 | ||
514 | /* Configure inbound ranges PIMs */ | |
515 | ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi); | |
516 | ||
517 | /* We don't need the registers anymore */ | |
518 | iounmap(reg); | |
519 | return; | |
520 | ||
521 | fail: | |
522 | if (hose) | |
523 | pcibios_free_controller(hose); | |
524 | if (reg) | |
525 | iounmap(reg); | |
526 | } | |
527 | ||
a2d2e1ec BH |
528 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
529 | ||
5738ec6d BH |
530 | /* |
531 | * 4xx PCI-Express part | |
a2d2e1ec BH |
532 | * |
533 | * We support 3 parts currently based on the compatible property: | |
534 | * | |
accf5ef2 | 535 | * ibm,plb-pciex-440spe |
a2d2e1ec | 536 | * ibm,plb-pciex-405ex |
66b7e504 | 537 | * ibm,plb-pciex-460ex |
a2d2e1ec BH |
538 | * |
539 | * Anything else will be rejected for now as they are all subtly | |
540 | * different unfortunately. | |
541 | * | |
5738ec6d | 542 | */ |
a2d2e1ec | 543 | |
78994e24 | 544 | #define MAX_PCIE_BUS_MAPPED 0x40 |
a2d2e1ec BH |
545 | |
546 | struct ppc4xx_pciex_port | |
547 | { | |
548 | struct pci_controller *hose; | |
549 | struct device_node *node; | |
550 | unsigned int index; | |
551 | int endpoint; | |
035ee428 BH |
552 | int link; |
553 | int has_ibpre; | |
a2d2e1ec BH |
554 | unsigned int sdr_base; |
555 | dcr_host_t dcrs; | |
556 | struct resource cfg_space; | |
557 | struct resource utl_regs; | |
035ee428 | 558 | void __iomem *utl_base; |
a2d2e1ec BH |
559 | }; |
560 | ||
561 | static struct ppc4xx_pciex_port *ppc4xx_pciex_ports; | |
562 | static unsigned int ppc4xx_pciex_port_count; | |
563 | ||
564 | struct ppc4xx_pciex_hwops | |
565 | { | |
566 | int (*core_init)(struct device_node *np); | |
567 | int (*port_init_hw)(struct ppc4xx_pciex_port *port); | |
568 | int (*setup_utl)(struct ppc4xx_pciex_port *port); | |
569 | }; | |
570 | ||
571 | static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops; | |
572 | ||
573 | #ifdef CONFIG_44x | |
574 | ||
575 | /* Check various reset bits of the 440SPe PCIe core */ | |
576 | static int __init ppc440spe_pciex_check_reset(struct device_node *np) | |
577 | { | |
578 | u32 valPE0, valPE1, valPE2; | |
579 | int err = 0; | |
580 | ||
581 | /* SDR0_PEGPLLLCT1 reset */ | |
582 | if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) { | |
583 | /* | |
584 | * the PCIe core was probably already initialised | |
585 | * by firmware - let's re-reset RCSSET regs | |
586 | * | |
587 | * -- Shouldn't we also re-reset the whole thing ? -- BenH | |
588 | */ | |
589 | pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n"); | |
590 | mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000); | |
591 | mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000); | |
592 | mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000); | |
593 | } | |
594 | ||
595 | valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET); | |
596 | valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET); | |
597 | valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET); | |
598 | ||
599 | /* SDR0_PExRCSSET rstgu */ | |
600 | if (!(valPE0 & 0x01000000) || | |
601 | !(valPE1 & 0x01000000) || | |
602 | !(valPE2 & 0x01000000)) { | |
603 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n"); | |
604 | err = -1; | |
605 | } | |
606 | ||
607 | /* SDR0_PExRCSSET rstdl */ | |
608 | if (!(valPE0 & 0x00010000) || | |
609 | !(valPE1 & 0x00010000) || | |
610 | !(valPE2 & 0x00010000)) { | |
611 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n"); | |
612 | err = -1; | |
613 | } | |
614 | ||
615 | /* SDR0_PExRCSSET rstpyn */ | |
616 | if ((valPE0 & 0x00001000) || | |
617 | (valPE1 & 0x00001000) || | |
618 | (valPE2 & 0x00001000)) { | |
619 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n"); | |
620 | err = -1; | |
621 | } | |
622 | ||
623 | /* SDR0_PExRCSSET hldplb */ | |
624 | if ((valPE0 & 0x10000000) || | |
625 | (valPE1 & 0x10000000) || | |
626 | (valPE2 & 0x10000000)) { | |
627 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n"); | |
628 | err = -1; | |
629 | } | |
630 | ||
631 | /* SDR0_PExRCSSET rdy */ | |
632 | if ((valPE0 & 0x00100000) || | |
633 | (valPE1 & 0x00100000) || | |
634 | (valPE2 & 0x00100000)) { | |
635 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n"); | |
636 | err = -1; | |
637 | } | |
638 | ||
639 | /* SDR0_PExRCSSET shutdown */ | |
640 | if ((valPE0 & 0x00000100) || | |
641 | (valPE1 & 0x00000100) || | |
642 | (valPE2 & 0x00000100)) { | |
643 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n"); | |
644 | err = -1; | |
645 | } | |
646 | ||
647 | return err; | |
648 | } | |
649 | ||
650 | /* Global PCIe core initializations for 440SPe core */ | |
651 | static int __init ppc440spe_pciex_core_init(struct device_node *np) | |
652 | { | |
653 | int time_out = 20; | |
654 | ||
655 | /* Set PLL clock receiver to LVPECL */ | |
6e42b21b | 656 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28); |
a2d2e1ec BH |
657 | |
658 | /* Shouldn't we do all the calibration stuff etc... here ? */ | |
659 | if (ppc440spe_pciex_check_reset(np)) | |
660 | return -ENXIO; | |
661 | ||
662 | if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) { | |
663 | printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration " | |
664 | "failed (0x%08x)\n", | |
665 | mfdcri(SDR0, PESDR0_PLLLCT2)); | |
666 | return -1; | |
667 | } | |
668 | ||
669 | /* De-assert reset of PCIe PLL, wait for lock */ | |
6e42b21b | 670 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0); |
a2d2e1ec BH |
671 | udelay(3); |
672 | ||
673 | while (time_out) { | |
674 | if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) { | |
675 | time_out--; | |
676 | udelay(1); | |
677 | } else | |
678 | break; | |
679 | } | |
680 | if (!time_out) { | |
681 | printk(KERN_INFO "PCIE: VCO output not locked\n"); | |
682 | return -1; | |
683 | } | |
684 | ||
685 | pr_debug("PCIE initialization OK\n"); | |
686 | ||
687 | return 3; | |
688 | } | |
689 | ||
690 | static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port) | |
691 | { | |
692 | u32 val = 1 << 24; | |
693 | ||
694 | if (port->endpoint) | |
695 | val = PTYPE_LEGACY_ENDPOINT << 20; | |
696 | else | |
697 | val = PTYPE_ROOT_PORT << 20; | |
698 | ||
699 | if (port->index == 0) | |
700 | val |= LNKW_X8 << 12; | |
701 | else | |
702 | val |= LNKW_X4 << 12; | |
703 | ||
704 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); | |
705 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222); | |
accf5ef2 | 706 | if (ppc440spe_revA()) |
a2d2e1ec BH |
707 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000); |
708 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000); | |
709 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000); | |
710 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000); | |
711 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000); | |
712 | if (port->index == 0) { | |
713 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1, | |
714 | 0x35000000); | |
715 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1, | |
716 | 0x35000000); | |
717 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1, | |
718 | 0x35000000); | |
719 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1, | |
720 | 0x35000000); | |
721 | } | |
6e42b21b VB |
722 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, |
723 | (1 << 24) | (1 << 16), 1 << 12); | |
a2d2e1ec BH |
724 | |
725 | return 0; | |
726 | } | |
727 | ||
035ee428 BH |
728 | static int ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
729 | { | |
730 | return ppc440spe_pciex_init_port_hw(port); | |
731 | } | |
732 | ||
733 | static int ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port) | |
a2d2e1ec | 734 | { |
035ee428 BH |
735 | int rc = ppc440spe_pciex_init_port_hw(port); |
736 | ||
737 | port->has_ibpre = 1; | |
738 | ||
739 | return rc; | |
740 | } | |
a2d2e1ec | 741 | |
035ee428 BH |
742 | static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port) |
743 | { | |
a2d2e1ec BH |
744 | /* XXX Check what that value means... I hate magic */ |
745 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800); | |
746 | ||
a2d2e1ec BH |
747 | /* |
748 | * Set buffer allocations and then assert VRB and TXE. | |
749 | */ | |
035ee428 BH |
750 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); |
751 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
752 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000); | |
753 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000); | |
754 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000); | |
755 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000); | |
756 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); | |
757 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
a2d2e1ec | 758 | |
035ee428 BH |
759 | return 0; |
760 | } | |
761 | ||
762 | static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
763 | { | |
764 | /* Report CRS to the operating system */ | |
765 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); | |
a2d2e1ec BH |
766 | |
767 | return 0; | |
768 | } | |
769 | ||
770 | static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata = | |
771 | { | |
772 | .core_init = ppc440spe_pciex_core_init, | |
035ee428 | 773 | .port_init_hw = ppc440speA_pciex_init_port_hw, |
a2d2e1ec BH |
774 | .setup_utl = ppc440speA_pciex_init_utl, |
775 | }; | |
776 | ||
777 | static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata = | |
778 | { | |
779 | .core_init = ppc440spe_pciex_core_init, | |
035ee428 BH |
780 | .port_init_hw = ppc440speB_pciex_init_port_hw, |
781 | .setup_utl = ppc440speB_pciex_init_utl, | |
a2d2e1ec BH |
782 | }; |
783 | ||
66b7e504 SR |
784 | static int __init ppc460ex_pciex_core_init(struct device_node *np) |
785 | { | |
786 | /* Nothing to do, return 2 ports */ | |
787 | return 2; | |
788 | } | |
789 | ||
790 | static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) | |
791 | { | |
792 | u32 val; | |
793 | u32 utlset1; | |
794 | ||
5f91925c | 795 | if (port->endpoint) |
66b7e504 | 796 | val = PTYPE_LEGACY_ENDPOINT << 20; |
5f91925c | 797 | else |
66b7e504 | 798 | val = PTYPE_ROOT_PORT << 20; |
66b7e504 SR |
799 | |
800 | if (port->index == 0) { | |
801 | val |= LNKW_X1 << 12; | |
5f91925c | 802 | utlset1 = 0x20000000; |
66b7e504 SR |
803 | } else { |
804 | val |= LNKW_X4 << 12; | |
5f91925c | 805 | utlset1 = 0x20101101; |
66b7e504 SR |
806 | } |
807 | ||
808 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); | |
809 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1); | |
810 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000); | |
811 | ||
812 | switch (port->index) { | |
813 | case 0: | |
814 | mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); | |
e30c9875 | 815 | mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); |
66b7e504 SR |
816 | mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); |
817 | ||
818 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000); | |
819 | break; | |
820 | ||
821 | case 1: | |
822 | mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230); | |
823 | mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230); | |
824 | mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230); | |
825 | mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230); | |
e30c9875 TM |
826 | mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130); |
827 | mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130); | |
828 | mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130); | |
829 | mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130); | |
66b7e504 SR |
830 | mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006); |
831 | mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006); | |
832 | mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006); | |
833 | mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006); | |
834 | ||
835 | mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000); | |
836 | break; | |
837 | } | |
838 | ||
839 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
840 | mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | | |
841 | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); | |
842 | ||
843 | /* Poll for PHY reset */ | |
844 | /* XXX FIXME add timeout */ | |
845 | switch (port->index) { | |
846 | case 0: | |
847 | while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1)) | |
848 | udelay(10); | |
849 | break; | |
850 | case 1: | |
851 | while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1)) | |
852 | udelay(10); | |
853 | break; | |
854 | } | |
855 | ||
856 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
857 | (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & | |
858 | ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | | |
859 | PESDRx_RCSSET_RSTPYN); | |
860 | ||
861 | port->has_ibpre = 1; | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
867 | { | |
868 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); | |
869 | ||
870 | /* | |
871 | * Set buffer allocations and then assert VRB and TXE. | |
872 | */ | |
873 | out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c); | |
874 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); | |
875 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
876 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); | |
877 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000); | |
878 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); | |
879 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); | |
880 | out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000); | |
881 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata = | |
887 | { | |
888 | .core_init = ppc460ex_pciex_core_init, | |
889 | .port_init_hw = ppc460ex_pciex_init_port_hw, | |
890 | .setup_utl = ppc460ex_pciex_init_utl, | |
891 | }; | |
892 | ||
a2d2e1ec BH |
893 | #endif /* CONFIG_44x */ |
894 | ||
895 | #ifdef CONFIG_40x | |
896 | ||
897 | static int __init ppc405ex_pciex_core_init(struct device_node *np) | |
898 | { | |
899 | /* Nothing to do, return 2 ports */ | |
900 | return 2; | |
901 | } | |
902 | ||
903 | static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port) | |
904 | { | |
905 | /* Assert the PE0_PHY reset */ | |
906 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000); | |
907 | msleep(1); | |
908 | ||
909 | /* deassert the PE0_hotreset */ | |
910 | if (port->endpoint) | |
911 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000); | |
912 | else | |
913 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000); | |
914 | ||
915 | /* poll for phy !reset */ | |
916 | /* XXX FIXME add timeout */ | |
917 | while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000)) | |
918 | ; | |
919 | ||
920 | /* deassert the PE0_gpl_utl_reset */ | |
921 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000); | |
922 | } | |
923 | ||
924 | static int ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) | |
925 | { | |
926 | u32 val; | |
927 | ||
928 | if (port->endpoint) | |
929 | val = PTYPE_LEGACY_ENDPOINT; | |
930 | else | |
931 | val = PTYPE_ROOT_PORT; | |
932 | ||
933 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, | |
934 | 1 << 24 | val << 20 | LNKW_X1 << 12); | |
935 | ||
936 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); | |
937 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); | |
938 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000); | |
939 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003); | |
940 | ||
941 | /* | |
942 | * Only reset the PHY when no link is currently established. | |
943 | * This is for the Atheros PCIe board which has problems to establish | |
944 | * the link (again) after this PHY reset. All other currently tested | |
945 | * PCIe boards don't show this problem. | |
946 | * This has to be re-tested and fixed in a later release! | |
947 | */ | |
a2d2e1ec BH |
948 | val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP); |
949 | if (!(val & 0x00001000)) | |
950 | ppc405ex_pcie_phy_reset(port); | |
a2d2e1ec BH |
951 | |
952 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */ | |
953 | ||
55aaf6ec SR |
954 | port->has_ibpre = 1; |
955 | ||
a2d2e1ec BH |
956 | return 0; |
957 | } | |
958 | ||
959 | static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
960 | { | |
a2d2e1ec BH |
961 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); |
962 | ||
a2d2e1ec BH |
963 | /* |
964 | * Set buffer allocations and then assert VRB and TXE. | |
965 | */ | |
035ee428 BH |
966 | out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000); |
967 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
968 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); | |
969 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000); | |
970 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); | |
971 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); | |
972 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); | |
973 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
a2d2e1ec | 974 | |
035ee428 | 975 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); |
a2d2e1ec BH |
976 | |
977 | return 0; | |
978 | } | |
979 | ||
980 | static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata = | |
981 | { | |
982 | .core_init = ppc405ex_pciex_core_init, | |
983 | .port_init_hw = ppc405ex_pciex_init_port_hw, | |
984 | .setup_utl = ppc405ex_pciex_init_utl, | |
985 | }; | |
986 | ||
987 | #endif /* CONFIG_40x */ | |
988 | ||
989 | ||
990 | /* Check that the core has been initied and if not, do it */ | |
991 | static int __init ppc4xx_pciex_check_core_init(struct device_node *np) | |
992 | { | |
993 | static int core_init; | |
994 | int count = -ENODEV; | |
995 | ||
996 | if (core_init++) | |
997 | return 0; | |
998 | ||
999 | #ifdef CONFIG_44x | |
accf5ef2 SR |
1000 | if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) { |
1001 | if (ppc440spe_revA()) | |
1002 | ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops; | |
1003 | else | |
1004 | ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops; | |
1005 | } | |
66b7e504 SR |
1006 | if (of_device_is_compatible(np, "ibm,plb-pciex-460ex")) |
1007 | ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops; | |
a2d2e1ec BH |
1008 | #endif /* CONFIG_44x */ |
1009 | #ifdef CONFIG_40x | |
1010 | if (of_device_is_compatible(np, "ibm,plb-pciex-405ex")) | |
1011 | ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops; | |
1012 | #endif | |
1013 | if (ppc4xx_pciex_hwops == NULL) { | |
1014 | printk(KERN_WARNING "PCIE: unknown host type %s\n", | |
1015 | np->full_name); | |
1016 | return -ENODEV; | |
1017 | } | |
1018 | ||
1019 | count = ppc4xx_pciex_hwops->core_init(np); | |
1020 | if (count > 0) { | |
1021 | ppc4xx_pciex_ports = | |
1022 | kzalloc(count * sizeof(struct ppc4xx_pciex_port), | |
1023 | GFP_KERNEL); | |
1024 | if (ppc4xx_pciex_ports) { | |
1025 | ppc4xx_pciex_port_count = count; | |
1026 | return 0; | |
1027 | } | |
1028 | printk(KERN_WARNING "PCIE: failed to allocate ports array\n"); | |
1029 | return -ENOMEM; | |
1030 | } | |
1031 | return -ENODEV; | |
1032 | } | |
1033 | ||
1034 | static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port) | |
1035 | { | |
1036 | /* We map PCI Express configuration based on the reg property */ | |
1037 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH, | |
1038 | RES_TO_U32_HIGH(port->cfg_space.start)); | |
1039 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL, | |
1040 | RES_TO_U32_LOW(port->cfg_space.start)); | |
1041 | ||
1042 | /* XXX FIXME: Use size from reg property. For now, map 512M */ | |
1043 | dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001); | |
1044 | ||
1045 | /* We map UTL registers based on the reg property */ | |
1046 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAH, | |
1047 | RES_TO_U32_HIGH(port->utl_regs.start)); | |
1048 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAL, | |
1049 | RES_TO_U32_LOW(port->utl_regs.start)); | |
1050 | ||
1051 | /* XXX FIXME: Use size from reg property */ | |
1052 | dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001); | |
1053 | ||
1054 | /* Disable all other outbound windows */ | |
1055 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0); | |
1056 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0); | |
1057 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0); | |
1058 | dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0); | |
1059 | } | |
1060 | ||
035ee428 BH |
1061 | static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port, |
1062 | unsigned int sdr_offset, | |
1063 | unsigned int mask, | |
1064 | unsigned int value, | |
1065 | int timeout_ms) | |
a2d2e1ec | 1066 | { |
a2d2e1ec BH |
1067 | u32 val; |
1068 | ||
035ee428 BH |
1069 | while(timeout_ms--) { |
1070 | val = mfdcri(SDR0, port->sdr_base + sdr_offset); | |
1071 | if ((val & mask) == value) { | |
1072 | pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n", | |
1073 | port->index, sdr_offset, timeout_ms, val); | |
1074 | return 0; | |
1075 | } | |
1076 | msleep(1); | |
1077 | } | |
1078 | return -1; | |
1079 | } | |
1080 | ||
1081 | static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port) | |
1082 | { | |
1083 | int rc = 0; | |
a2d2e1ec BH |
1084 | |
1085 | /* Init HW */ | |
1086 | if (ppc4xx_pciex_hwops->port_init_hw) | |
1087 | rc = ppc4xx_pciex_hwops->port_init_hw(port); | |
1088 | if (rc != 0) | |
1089 | return rc; | |
1090 | ||
035ee428 | 1091 | printk(KERN_INFO "PCIE%d: Checking link...\n", |
a2d2e1ec | 1092 | port->index); |
a2d2e1ec | 1093 | |
035ee428 BH |
1094 | /* Wait for reset to complete */ |
1095 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) { | |
1096 | printk(KERN_WARNING "PCIE%d: PGRST failed\n", | |
1097 | port->index); | |
a2d2e1ec BH |
1098 | return -1; |
1099 | } | |
1100 | ||
035ee428 BH |
1101 | /* Check for card presence detect if supported, if not, just wait for |
1102 | * link unconditionally. | |
1103 | * | |
1104 | * note that we don't fail if there is no link, we just filter out | |
1105 | * config space accesses. That way, it will be easier to implement | |
1106 | * hotplug later on. | |
a2d2e1ec | 1107 | */ |
035ee428 BH |
1108 | if (!port->has_ibpre || |
1109 | !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, | |
1110 | 1 << 28, 1 << 28, 100)) { | |
1111 | printk(KERN_INFO | |
1112 | "PCIE%d: Device detected, waiting for link...\n", | |
a2d2e1ec | 1113 | port->index); |
035ee428 BH |
1114 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, |
1115 | 0x1000, 0x1000, 2000)) | |
1116 | printk(KERN_WARNING | |
1117 | "PCIE%d: Link up failed\n", port->index); | |
1118 | else { | |
1119 | printk(KERN_INFO | |
1120 | "PCIE%d: link is up !\n", port->index); | |
1121 | port->link = 1; | |
1122 | } | |
1123 | } else | |
1124 | printk(KERN_INFO "PCIE%d: No device detected.\n", port->index); | |
a2d2e1ec BH |
1125 | |
1126 | /* | |
1127 | * Initialize mapping: disable all regions and configure | |
1128 | * CFG and REG regions based on resources in the device tree | |
1129 | */ | |
1130 | ppc4xx_pciex_port_init_mapping(port); | |
1131 | ||
1132 | /* | |
035ee428 BH |
1133 | * Map UTL |
1134 | */ | |
1135 | port->utl_base = ioremap(port->utl_regs.start, 0x100); | |
1136 | BUG_ON(port->utl_base == NULL); | |
1137 | ||
1138 | /* | |
1139 | * Setup UTL registers --BenH. | |
a2d2e1ec BH |
1140 | */ |
1141 | if (ppc4xx_pciex_hwops->setup_utl) | |
1142 | ppc4xx_pciex_hwops->setup_utl(port); | |
1143 | ||
1144 | /* | |
1145 | * Check for VC0 active and assert RDY. | |
1146 | */ | |
035ee428 BH |
1147 | if (port->link && |
1148 | ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, | |
1149 | 1 << 16, 1 << 16, 5000)) { | |
1150 | printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index); | |
1151 | port->link = 0; | |
a2d2e1ec | 1152 | } |
035ee428 | 1153 | |
6e42b21b | 1154 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20); |
a2d2e1ec BH |
1155 | msleep(100); |
1156 | ||
1157 | return 0; | |
1158 | } | |
1159 | ||
1160 | static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port, | |
1161 | struct pci_bus *bus, | |
1162 | unsigned int devfn) | |
1163 | { | |
1164 | static int message; | |
1165 | ||
1166 | /* Endpoint can not generate upstream(remote) config cycles */ | |
1167 | if (port->endpoint && bus->number != port->hose->first_busno) | |
1168 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1169 | ||
1170 | /* Check we are within the mapped range */ | |
1171 | if (bus->number > port->hose->last_busno) { | |
1172 | if (!message) { | |
1173 | printk(KERN_WARNING "Warning! Probing bus %u" | |
1174 | " out of range !\n", bus->number); | |
1175 | message++; | |
1176 | } | |
1177 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1178 | } | |
1179 | ||
1180 | /* The root complex has only one device / function */ | |
1181 | if (bus->number == port->hose->first_busno && devfn != 0) | |
1182 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1183 | ||
1184 | /* The other side of the RC has only one device as well */ | |
1185 | if (bus->number == (port->hose->first_busno + 1) && | |
1186 | PCI_SLOT(devfn) != 0) | |
1187 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1188 | ||
035ee428 BH |
1189 | /* Check if we have a link */ |
1190 | if ((bus->number != port->hose->first_busno) && !port->link) | |
1191 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1192 | ||
a2d2e1ec BH |
1193 | return 0; |
1194 | } | |
1195 | ||
1196 | static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port, | |
1197 | struct pci_bus *bus, | |
1198 | unsigned int devfn) | |
1199 | { | |
1200 | int relbus; | |
1201 | ||
1202 | /* Remove the casts when we finally remove the stupid volatile | |
1203 | * in struct pci_controller | |
1204 | */ | |
1205 | if (bus->number == port->hose->first_busno) | |
1206 | return (void __iomem *)port->hose->cfg_addr; | |
1207 | ||
1208 | relbus = bus->number - (port->hose->first_busno + 1); | |
1209 | return (void __iomem *)port->hose->cfg_data + | |
1210 | ((relbus << 20) | (devfn << 12)); | |
1211 | } | |
1212 | ||
1213 | static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn, | |
1214 | int offset, int len, u32 *val) | |
1215 | { | |
1216 | struct pci_controller *hose = (struct pci_controller *) bus->sysdata; | |
1217 | struct ppc4xx_pciex_port *port = | |
1218 | &ppc4xx_pciex_ports[hose->indirect_type]; | |
1219 | void __iomem *addr; | |
1220 | u32 gpl_cfg; | |
1221 | ||
1222 | BUG_ON(hose != port->hose); | |
1223 | ||
1224 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) | |
1225 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1226 | ||
1227 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); | |
1228 | ||
1229 | /* | |
1230 | * Reading from configuration space of non-existing device can | |
1231 | * generate transaction errors. For the read duration we suppress | |
1232 | * assertion of machine check exceptions to avoid those. | |
1233 | */ | |
1234 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); | |
1235 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); | |
1236 | ||
035ee428 BH |
1237 | /* Make sure no CRS is recorded */ |
1238 | out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000); | |
1239 | ||
a2d2e1ec BH |
1240 | switch (len) { |
1241 | case 1: | |
1242 | *val = in_8((u8 *)(addr + offset)); | |
1243 | break; | |
1244 | case 2: | |
1245 | *val = in_le16((u16 *)(addr + offset)); | |
1246 | break; | |
1247 | default: | |
1248 | *val = in_le32((u32 *)(addr + offset)); | |
1249 | break; | |
1250 | } | |
1251 | ||
1252 | pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x" | |
1253 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", | |
1254 | bus->number, hose->first_busno, hose->last_busno, | |
1255 | devfn, offset, len, addr + offset, *val); | |
1256 | ||
035ee428 BH |
1257 | /* Check for CRS (440SPe rev B does that for us but heh ..) */ |
1258 | if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) { | |
1259 | pr_debug("Got CRS !\n"); | |
1260 | if (len != 4 || offset != 0) | |
1261 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1262 | *val = 0xffff0001; | |
1263 | } | |
1264 | ||
a2d2e1ec BH |
1265 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); |
1266 | ||
1267 | return PCIBIOS_SUCCESSFUL; | |
1268 | } | |
1269 | ||
1270 | static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn, | |
1271 | int offset, int len, u32 val) | |
1272 | { | |
1273 | struct pci_controller *hose = (struct pci_controller *) bus->sysdata; | |
1274 | struct ppc4xx_pciex_port *port = | |
1275 | &ppc4xx_pciex_ports[hose->indirect_type]; | |
1276 | void __iomem *addr; | |
1277 | u32 gpl_cfg; | |
1278 | ||
1279 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) | |
1280 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1281 | ||
1282 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); | |
1283 | ||
1284 | /* | |
1285 | * Reading from configuration space of non-existing device can | |
1286 | * generate transaction errors. For the read duration we suppress | |
1287 | * assertion of machine check exceptions to avoid those. | |
1288 | */ | |
1289 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); | |
1290 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); | |
1291 | ||
1292 | pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x" | |
1293 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", | |
1294 | bus->number, hose->first_busno, hose->last_busno, | |
1295 | devfn, offset, len, addr + offset, val); | |
1296 | ||
1297 | switch (len) { | |
1298 | case 1: | |
1299 | out_8((u8 *)(addr + offset), val); | |
1300 | break; | |
1301 | case 2: | |
1302 | out_le16((u16 *)(addr + offset), val); | |
1303 | break; | |
1304 | default: | |
1305 | out_le32((u32 *)(addr + offset), val); | |
1306 | break; | |
1307 | } | |
1308 | ||
1309 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); | |
1310 | ||
1311 | return PCIBIOS_SUCCESSFUL; | |
1312 | } | |
1313 | ||
1314 | static struct pci_ops ppc4xx_pciex_pci_ops = | |
1315 | { | |
1316 | .read = ppc4xx_pciex_read_config, | |
1317 | .write = ppc4xx_pciex_write_config, | |
1318 | }; | |
1319 | ||
1320 | static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port, | |
1321 | struct pci_controller *hose, | |
1322 | void __iomem *mbase) | |
1323 | { | |
1324 | u32 lah, lal, pciah, pcial, sa; | |
1325 | int i, j; | |
1326 | ||
1327 | /* Setup outbound memory windows */ | |
1328 | for (i = j = 0; i < 3; i++) { | |
1329 | struct resource *res = &hose->mem_resources[i]; | |
1330 | ||
1331 | /* we only care about memory windows */ | |
1332 | if (!(res->flags & IORESOURCE_MEM)) | |
1333 | continue; | |
1334 | if (j > 1) { | |
1335 | printk(KERN_WARNING "%s: Too many ranges\n", | |
1336 | port->node->full_name); | |
1337 | break; | |
1338 | } | |
1339 | ||
1340 | /* Calculate register values */ | |
1341 | lah = RES_TO_U32_HIGH(res->start); | |
1342 | lal = RES_TO_U32_LOW(res->start); | |
1343 | pciah = RES_TO_U32_HIGH(res->start - hose->pci_mem_offset); | |
1344 | pcial = RES_TO_U32_LOW(res->start - hose->pci_mem_offset); | |
1345 | sa = res->end + 1 - res->start; | |
1346 | if (!is_power_of_2(sa) || sa < 0x100000 || | |
1347 | sa > 0xffffffffu) { | |
1348 | printk(KERN_WARNING "%s: Resource out of range\n", | |
1349 | port->node->full_name); | |
1350 | continue; | |
1351 | } | |
1352 | sa = (0xffffffffu << ilog2(sa)) | 0x1; | |
1353 | ||
1354 | /* Program register values */ | |
1355 | switch (j) { | |
1356 | case 0: | |
1357 | out_le32(mbase + PECFG_POM0LAH, pciah); | |
1358 | out_le32(mbase + PECFG_POM0LAL, pcial); | |
1359 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah); | |
1360 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal); | |
1361 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff); | |
1362 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | 3); | |
1363 | break; | |
1364 | case 1: | |
1365 | out_le32(mbase + PECFG_POM1LAH, pciah); | |
1366 | out_le32(mbase + PECFG_POM1LAL, pcial); | |
1367 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah); | |
1368 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal); | |
1369 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff); | |
1370 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | 3); | |
1371 | break; | |
1372 | } | |
1373 | j++; | |
1374 | } | |
1375 | ||
1376 | /* Configure IO, always 64K starting at 0 */ | |
1377 | if (hose->io_resource.flags & IORESOURCE_IO) { | |
1378 | lah = RES_TO_U32_HIGH(hose->io_base_phys); | |
1379 | lal = RES_TO_U32_LOW(hose->io_base_phys); | |
1380 | out_le32(mbase + PECFG_POM2LAH, 0); | |
1381 | out_le32(mbase + PECFG_POM2LAL, 0); | |
1382 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah); | |
1383 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal); | |
1384 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff); | |
1385 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0xffff0000 | 3); | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port, | |
1390 | struct pci_controller *hose, | |
1391 | void __iomem *mbase, | |
1392 | struct resource *res) | |
1393 | { | |
1394 | resource_size_t size = res->end - res->start + 1; | |
1395 | u64 sa; | |
1396 | ||
80daac3f SR |
1397 | if (port->endpoint) { |
1398 | resource_size_t ep_addr = 0; | |
1399 | resource_size_t ep_size = 32 << 20; | |
1400 | ||
1401 | /* Currently we map a fixed 64MByte window to PLB address | |
1402 | * 0 (SDRAM). This should probably be configurable via a dts | |
1403 | * property. | |
1404 | */ | |
1405 | ||
1406 | /* Calculate window size */ | |
1407 | sa = (0xffffffffffffffffull << ilog2(ep_size));; | |
1408 | ||
1409 | /* Setup BAR0 */ | |
1410 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); | |
1411 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) | | |
1412 | PCI_BASE_ADDRESS_MEM_TYPE_64); | |
a2d2e1ec | 1413 | |
80daac3f SR |
1414 | /* Disable BAR1 & BAR2 */ |
1415 | out_le32(mbase + PECFG_BAR1MPA, 0); | |
1416 | out_le32(mbase + PECFG_BAR2HMPA, 0); | |
1417 | out_le32(mbase + PECFG_BAR2LMPA, 0); | |
a2d2e1ec | 1418 | |
80daac3f SR |
1419 | out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa)); |
1420 | out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa)); | |
1421 | ||
1422 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr)); | |
1423 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr)); | |
1424 | } else { | |
1425 | /* Calculate window size */ | |
1426 | sa = (0xffffffffffffffffull << ilog2(size));; | |
1427 | if (res->flags & IORESOURCE_PREFETCH) | |
1428 | sa |= 0x8; | |
1429 | ||
1430 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); | |
1431 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa)); | |
1432 | ||
1433 | /* The setup of the split looks weird to me ... let's see | |
1434 | * if it works | |
1435 | */ | |
1436 | out_le32(mbase + PECFG_PIM0LAL, 0x00000000); | |
1437 | out_le32(mbase + PECFG_PIM0LAH, 0x00000000); | |
1438 | out_le32(mbase + PECFG_PIM1LAL, 0x00000000); | |
1439 | out_le32(mbase + PECFG_PIM1LAH, 0x00000000); | |
1440 | out_le32(mbase + PECFG_PIM01SAH, 0xffff0000); | |
1441 | out_le32(mbase + PECFG_PIM01SAL, 0x00000000); | |
1442 | ||
1443 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start)); | |
1444 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start)); | |
1445 | } | |
a2d2e1ec BH |
1446 | |
1447 | /* Enable inbound mapping */ | |
1448 | out_le32(mbase + PECFG_PIMEN, 0x1); | |
1449 | ||
a2d2e1ec BH |
1450 | /* Enable I/O, Mem, and Busmaster cycles */ |
1451 | out_le16(mbase + PCI_COMMAND, | |
1452 | in_le16(mbase + PCI_COMMAND) | | |
1453 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); | |
1454 | } | |
1455 | ||
1456 | static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port) | |
1457 | { | |
1458 | struct resource dma_window; | |
1459 | struct pci_controller *hose = NULL; | |
1460 | const int *bus_range; | |
1461 | int primary = 0, busses; | |
1462 | void __iomem *mbase = NULL, *cfg_data = NULL; | |
80daac3f SR |
1463 | const u32 *pval; |
1464 | u32 val; | |
a2d2e1ec BH |
1465 | |
1466 | /* Check if primary bridge */ | |
1467 | if (of_get_property(port->node, "primary", NULL)) | |
1468 | primary = 1; | |
1469 | ||
1470 | /* Get bus range if any */ | |
1471 | bus_range = of_get_property(port->node, "bus-range", NULL); | |
1472 | ||
1473 | /* Allocate the host controller data structure */ | |
1474 | hose = pcibios_alloc_controller(port->node); | |
1475 | if (!hose) | |
1476 | goto fail; | |
1477 | ||
1478 | /* We stick the port number in "indirect_type" so the config space | |
1479 | * ops can retrieve the port data structure easily | |
1480 | */ | |
1481 | hose->indirect_type = port->index; | |
1482 | ||
1483 | /* Get bus range */ | |
1484 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
1485 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
1486 | ||
1487 | /* Because of how big mapping the config space is (1M per bus), we | |
1488 | * limit how many busses we support. In the long run, we could replace | |
1489 | * that with something akin to kmap_atomic instead. We set aside 1 bus | |
1490 | * for the host itself too. | |
1491 | */ | |
1492 | busses = hose->last_busno - hose->first_busno; /* This is off by 1 */ | |
1493 | if (busses > MAX_PCIE_BUS_MAPPED) { | |
1494 | busses = MAX_PCIE_BUS_MAPPED; | |
1495 | hose->last_busno = hose->first_busno + busses; | |
1496 | } | |
1497 | ||
80daac3f SR |
1498 | if (!port->endpoint) { |
1499 | /* Only map the external config space in cfg_data for | |
1500 | * PCIe root-complexes. External space is 1M per bus | |
1501 | */ | |
1502 | cfg_data = ioremap(port->cfg_space.start + | |
1503 | (hose->first_busno + 1) * 0x100000, | |
1504 | busses * 0x100000); | |
1505 | if (cfg_data == NULL) { | |
1506 | printk(KERN_ERR "%s: Can't map external config space !", | |
1507 | port->node->full_name); | |
1508 | goto fail; | |
1509 | } | |
1510 | hose->cfg_data = cfg_data; | |
1511 | } | |
1512 | ||
1513 | /* Always map the host config space in cfg_addr. | |
1514 | * Internal space is 4K | |
a2d2e1ec | 1515 | */ |
a2d2e1ec | 1516 | mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); |
80daac3f SR |
1517 | if (mbase == NULL) { |
1518 | printk(KERN_ERR "%s: Can't map internal config space !", | |
a2d2e1ec BH |
1519 | port->node->full_name); |
1520 | goto fail; | |
1521 | } | |
a2d2e1ec BH |
1522 | hose->cfg_addr = mbase; |
1523 | ||
1524 | pr_debug("PCIE %s, bus %d..%d\n", port->node->full_name, | |
1525 | hose->first_busno, hose->last_busno); | |
1526 | pr_debug(" config space mapped at: root @0x%p, other @0x%p\n", | |
1527 | hose->cfg_addr, hose->cfg_data); | |
1528 | ||
1529 | /* Setup config space */ | |
1530 | hose->ops = &ppc4xx_pciex_pci_ops; | |
1531 | port->hose = hose; | |
1532 | mbase = (void __iomem *)hose->cfg_addr; | |
1533 | ||
80daac3f SR |
1534 | if (!port->endpoint) { |
1535 | /* | |
1536 | * Set bus numbers on our root port | |
1537 | */ | |
1538 | out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno); | |
1539 | out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1); | |
1540 | out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno); | |
1541 | } | |
a2d2e1ec BH |
1542 | |
1543 | /* | |
1544 | * OMRs are already reset, also disable PIMs | |
1545 | */ | |
1546 | out_le32(mbase + PECFG_PIMEN, 0); | |
1547 | ||
1548 | /* Parse outbound mapping resources */ | |
1549 | pci_process_bridge_OF_ranges(hose, port->node, primary); | |
1550 | ||
1551 | /* Parse inbound mapping resources */ | |
1552 | if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0) | |
1553 | goto fail; | |
1554 | ||
1555 | /* Configure outbound ranges POMs */ | |
1556 | ppc4xx_configure_pciex_POMs(port, hose, mbase); | |
1557 | ||
1558 | /* Configure inbound ranges PIMs */ | |
1559 | ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window); | |
1560 | ||
1561 | /* The root complex doesn't show up if we don't set some vendor | |
80daac3f SR |
1562 | * and device IDs into it. The defaults below are the same bogus |
1563 | * one that the initial code in arch/ppc had. This can be | |
1564 | * overwritten by setting the "vendor-id/device-id" properties | |
1565 | * in the pciex node. | |
a2d2e1ec | 1566 | */ |
a2d2e1ec | 1567 | |
80daac3f SR |
1568 | /* Get the (optional) vendor-/device-id from the device-tree */ |
1569 | pval = of_get_property(port->node, "vendor-id", NULL); | |
1570 | if (pval) { | |
1571 | val = *pval; | |
1572 | } else { | |
1573 | if (!port->endpoint) | |
1574 | val = 0xaaa0 + port->index; | |
1575 | else | |
1576 | val = 0xeee0 + port->index; | |
1577 | } | |
1578 | out_le16(mbase + 0x200, val); | |
1579 | ||
1580 | pval = of_get_property(port->node, "device-id", NULL); | |
1581 | if (pval) { | |
1582 | val = *pval; | |
1583 | } else { | |
1584 | if (!port->endpoint) | |
1585 | val = 0xbed0 + port->index; | |
1586 | else | |
1587 | val = 0xfed0 + port->index; | |
1588 | } | |
1589 | out_le16(mbase + 0x202, val); | |
1590 | ||
1591 | if (!port->endpoint) { | |
1592 | /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */ | |
1593 | out_le32(mbase + 0x208, 0x06040001); | |
1594 | ||
1595 | printk(KERN_INFO "PCIE%d: successfully set as root-complex\n", | |
1596 | port->index); | |
1597 | } else { | |
1598 | /* Set Class Code to Processor/PPC */ | |
1599 | out_le32(mbase + 0x208, 0x0b200001); | |
1600 | ||
1601 | printk(KERN_INFO "PCIE%d: successfully set as endpoint\n", | |
1602 | port->index); | |
1603 | } | |
a2d2e1ec | 1604 | |
a2d2e1ec BH |
1605 | return; |
1606 | fail: | |
1607 | if (hose) | |
1608 | pcibios_free_controller(hose); | |
1609 | if (cfg_data) | |
1610 | iounmap(cfg_data); | |
1611 | if (mbase) | |
1612 | iounmap(mbase); | |
1613 | } | |
1614 | ||
5738ec6d BH |
1615 | static void __init ppc4xx_probe_pciex_bridge(struct device_node *np) |
1616 | { | |
a2d2e1ec BH |
1617 | struct ppc4xx_pciex_port *port; |
1618 | const u32 *pval; | |
1619 | int portno; | |
1620 | unsigned int dcrs; | |
80daac3f | 1621 | const char *val; |
a2d2e1ec BH |
1622 | |
1623 | /* First, proceed to core initialization as we assume there's | |
1624 | * only one PCIe core in the system | |
1625 | */ | |
1626 | if (ppc4xx_pciex_check_core_init(np)) | |
1627 | return; | |
1628 | ||
1629 | /* Get the port number from the device-tree */ | |
1630 | pval = of_get_property(np, "port", NULL); | |
1631 | if (pval == NULL) { | |
1632 | printk(KERN_ERR "PCIE: Can't find port number for %s\n", | |
1633 | np->full_name); | |
1634 | return; | |
1635 | } | |
1636 | portno = *pval; | |
1637 | if (portno >= ppc4xx_pciex_port_count) { | |
1638 | printk(KERN_ERR "PCIE: port number out of range for %s\n", | |
1639 | np->full_name); | |
1640 | return; | |
1641 | } | |
1642 | port = &ppc4xx_pciex_ports[portno]; | |
1643 | port->index = portno; | |
995ada8d SR |
1644 | |
1645 | /* | |
1646 | * Check if device is enabled | |
1647 | */ | |
1648 | if (!of_device_is_available(np)) { | |
1649 | printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index); | |
1650 | return; | |
1651 | } | |
1652 | ||
a2d2e1ec BH |
1653 | port->node = of_node_get(np); |
1654 | pval = of_get_property(np, "sdr-base", NULL); | |
1655 | if (pval == NULL) { | |
1656 | printk(KERN_ERR "PCIE: missing sdr-base for %s\n", | |
1657 | np->full_name); | |
1658 | return; | |
1659 | } | |
1660 | port->sdr_base = *pval; | |
1661 | ||
80daac3f SR |
1662 | /* Check if device_type property is set to "pci" or "pci-endpoint". |
1663 | * Resulting from this setup this PCIe port will be configured | |
1664 | * as root-complex or as endpoint. | |
1665 | */ | |
1666 | val = of_get_property(port->node, "device_type", NULL); | |
1667 | if (!strcmp(val, "pci-endpoint")) { | |
1668 | port->endpoint = 1; | |
1669 | } else if (!strcmp(val, "pci")) { | |
1670 | port->endpoint = 0; | |
1671 | } else { | |
1672 | printk(KERN_ERR "PCIE: missing or incorrect device_type for %s\n", | |
1673 | np->full_name); | |
1674 | return; | |
1675 | } | |
035ee428 | 1676 | |
a2d2e1ec BH |
1677 | /* Fetch config space registers address */ |
1678 | if (of_address_to_resource(np, 0, &port->cfg_space)) { | |
1679 | printk(KERN_ERR "%s: Can't get PCI-E config space !", | |
1680 | np->full_name); | |
1681 | return; | |
1682 | } | |
1683 | /* Fetch host bridge internal registers address */ | |
1684 | if (of_address_to_resource(np, 1, &port->utl_regs)) { | |
1685 | printk(KERN_ERR "%s: Can't get UTL register base !", | |
1686 | np->full_name); | |
1687 | return; | |
1688 | } | |
1689 | ||
1690 | /* Map DCRs */ | |
1691 | dcrs = dcr_resource_start(np, 0); | |
1692 | if (dcrs == 0) { | |
1693 | printk(KERN_ERR "%s: Can't get DCR register base !", | |
1694 | np->full_name); | |
1695 | return; | |
1696 | } | |
1697 | port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); | |
1698 | ||
1699 | /* Initialize the port specific registers */ | |
035ee428 BH |
1700 | if (ppc4xx_pciex_port_init(port)) { |
1701 | printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index); | |
a2d2e1ec | 1702 | return; |
035ee428 | 1703 | } |
a2d2e1ec BH |
1704 | |
1705 | /* Setup the linux hose data structure */ | |
1706 | ppc4xx_pciex_port_setup_hose(port); | |
5738ec6d BH |
1707 | } |
1708 | ||
a2d2e1ec BH |
1709 | #endif /* CONFIG_PPC4xx_PCI_EXPRESS */ |
1710 | ||
5738ec6d BH |
1711 | static int __init ppc4xx_pci_find_bridges(void) |
1712 | { | |
1713 | struct device_node *np; | |
1714 | ||
a2d2e1ec | 1715 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
5738ec6d BH |
1716 | for_each_compatible_node(np, NULL, "ibm,plb-pciex") |
1717 | ppc4xx_probe_pciex_bridge(np); | |
a2d2e1ec | 1718 | #endif |
5738ec6d BH |
1719 | for_each_compatible_node(np, NULL, "ibm,plb-pcix") |
1720 | ppc4xx_probe_pcix_bridge(np); | |
1721 | for_each_compatible_node(np, NULL, "ibm,plb-pci") | |
1722 | ppc4xx_probe_pci_bridge(np); | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | arch_initcall(ppc4xx_pci_find_bridges); | |
1727 |