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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 | 25 | #include <linux/delay.h> |
5a0e3ad6 | 26 | #include <linux/slab.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 | 34 | |
bfa9a2eb | 35 | #include "pci.h" |
5738ec6d BH |
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) { | |
b7c670d6 | 130 | printk(KERN_WARNING "%pOF: Ignored unsupported dma range" |
5738ec6d | 131 | " 0x%016llx...0x%016llx -> 0x%016llx\n", |
b7c670d6 | 132 | hose->dn, |
5738ec6d BH |
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) { | |
b7c670d6 | 155 | printk(KERN_ERR "%pOF: dma-ranges(s) mismatch\n", hose->dn); |
5738ec6d BH |
156 | return -ENXIO; |
157 | } | |
158 | ||
159 | /* Check that we can fit all of memory as we don't support | |
160 | * DMA bounce buffers | |
161 | */ | |
162 | if (size < total_memory) { | |
b7c670d6 | 163 | printk(KERN_ERR "%pOF: dma-ranges too small " |
cc2e113b | 164 | "(size=%llx total_memory=%llx)\n", |
b7c670d6 | 165 | hose->dn, size, (u64)total_memory); |
5738ec6d BH |
166 | return -ENXIO; |
167 | } | |
168 | ||
169 | /* Check we are a power of 2 size and that base is a multiple of size*/ | |
cc2e113b | 170 | if ((size & (size - 1)) != 0 || |
5738ec6d | 171 | (res->start & (size - 1)) != 0) { |
b7c670d6 | 172 | printk(KERN_ERR "%pOF: dma-ranges unaligned\n", hose->dn); |
5738ec6d BH |
173 | return -ENXIO; |
174 | } | |
175 | ||
e2c37d90 AP |
176 | /* Check that we are fully contained within 32 bits space if we are not |
177 | * running on a 460sx or 476fpe which have 64 bit bus addresses. | |
178 | */ | |
179 | if (res->end > 0xffffffff && | |
180 | !(of_device_is_compatible(hose->dn, "ibm,plb-pciex-460sx") | |
181 | || of_device_is_compatible(hose->dn, "ibm,plb-pciex-476fpe"))) { | |
b7c670d6 RH |
182 | printk(KERN_ERR "%pOF: dma-ranges outside of 32 bits space\n", |
183 | hose->dn); | |
5738ec6d BH |
184 | return -ENXIO; |
185 | } | |
186 | out: | |
187 | dma_offset_set = 1; | |
188 | pci_dram_offset = res->start; | |
466c2bc7 TB |
189 | hose->dma_window_base_cur = res->start; |
190 | hose->dma_window_size = resource_size(res); | |
5738ec6d BH |
191 | |
192 | printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n", | |
193 | pci_dram_offset); | |
466c2bc7 TB |
194 | printk(KERN_INFO "4xx PCI DMA window base to 0x%016llx\n", |
195 | (unsigned long long)hose->dma_window_base_cur); | |
196 | printk(KERN_INFO "DMA window size 0x%016llx\n", | |
197 | (unsigned long long)hose->dma_window_size); | |
5738ec6d BH |
198 | return 0; |
199 | } | |
200 | ||
201 | /* | |
202 | * 4xx PCI 2.x part | |
203 | */ | |
c839e0ef | 204 | |
84d727a1 BH |
205 | static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose, |
206 | void __iomem *reg, | |
207 | u64 plb_addr, | |
208 | u64 pci_addr, | |
209 | u64 size, | |
210 | unsigned int flags, | |
211 | int index) | |
212 | { | |
213 | u32 ma, pcila, pciha; | |
214 | ||
1ac00cc2 BH |
215 | /* Hack warning ! The "old" PCI 2.x cell only let us configure the low |
216 | * 32-bit of incoming PLB addresses. The top 4 bits of the 36-bit | |
217 | * address are actually hard wired to a value that appears to depend | |
218 | * on the specific SoC. For example, it's 0 on 440EP and 1 on 440EPx. | |
219 | * | |
220 | * The trick here is we just crop those top bits and ignore them when | |
221 | * programming the chip. That means the device-tree has to be right | |
222 | * for the specific part used (we don't print a warning if it's wrong | |
223 | * but on the other hand, you'll crash quickly enough), but at least | |
224 | * this code should work whatever the hard coded value is | |
225 | */ | |
226 | plb_addr &= 0xffffffffull; | |
227 | ||
228 | /* Note: Due to the above hack, the test below doesn't actually test | |
229 | * if you address is above 4G, but it tests that address and | |
230 | * (address + size) are both contained in the same 4G | |
231 | */ | |
84d727a1 BH |
232 | if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) || |
233 | size < 0x1000 || (plb_addr & (size - 1)) != 0) { | |
b7c670d6 | 234 | printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); |
84d727a1 BH |
235 | return -1; |
236 | } | |
237 | ma = (0xffffffffu << ilog2(size)) | 1; | |
238 | if (flags & IORESOURCE_PREFETCH) | |
239 | ma |= 2; | |
240 | ||
241 | pciha = RES_TO_U32_HIGH(pci_addr); | |
242 | pcila = RES_TO_U32_LOW(pci_addr); | |
243 | ||
244 | writel(plb_addr, reg + PCIL0_PMM0LA + (0x10 * index)); | |
245 | writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * index)); | |
246 | writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * index)); | |
247 | writel(ma, reg + PCIL0_PMM0MA + (0x10 * index)); | |
248 | ||
249 | return 0; | |
250 | } | |
251 | ||
c839e0ef BH |
252 | static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose, |
253 | void __iomem *reg) | |
254 | { | |
84d727a1 | 255 | int i, j, found_isa_hole = 0; |
c839e0ef BH |
256 | |
257 | /* Setup outbound memory windows */ | |
258 | for (i = j = 0; i < 3; i++) { | |
259 | struct resource *res = &hose->mem_resources[i]; | |
3fd47f06 | 260 | resource_size_t offset = hose->mem_offset[i]; |
c839e0ef BH |
261 | |
262 | /* we only care about memory windows */ | |
263 | if (!(res->flags & IORESOURCE_MEM)) | |
264 | continue; | |
265 | if (j > 2) { | |
b7c670d6 | 266 | printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); |
c839e0ef BH |
267 | break; |
268 | } | |
269 | ||
84d727a1 BH |
270 | /* Configure the resource */ |
271 | if (ppc4xx_setup_one_pci_PMM(hose, reg, | |
272 | res->start, | |
3fd47f06 | 273 | res->start - offset, |
28f65c11 | 274 | resource_size(res), |
84d727a1 BH |
275 | res->flags, |
276 | j) == 0) { | |
277 | j++; | |
278 | ||
279 | /* If the resource PCI address is 0 then we have our | |
280 | * ISA memory hole | |
281 | */ | |
3fd47f06 | 282 | if (res->start == offset) |
84d727a1 | 283 | found_isa_hole = 1; |
c839e0ef | 284 | } |
c839e0ef | 285 | } |
84d727a1 BH |
286 | |
287 | /* Handle ISA memory hole if not already covered */ | |
288 | if (j <= 2 && !found_isa_hole && hose->isa_mem_size) | |
289 | if (ppc4xx_setup_one_pci_PMM(hose, reg, hose->isa_mem_phys, 0, | |
290 | hose->isa_mem_size, 0, j) == 0) | |
b7c670d6 RH |
291 | printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", |
292 | hose->dn); | |
c839e0ef BH |
293 | } |
294 | ||
295 | static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose, | |
296 | void __iomem *reg, | |
297 | const struct resource *res) | |
298 | { | |
28f65c11 | 299 | resource_size_t size = resource_size(res); |
c839e0ef BH |
300 | u32 sa; |
301 | ||
302 | /* Calculate window size */ | |
303 | sa = (0xffffffffu << ilog2(size)) | 1; | |
304 | sa |= 0x1; | |
305 | ||
306 | /* RAM is always at 0 local for now */ | |
307 | writel(0, reg + PCIL0_PTM1LA); | |
308 | writel(sa, reg + PCIL0_PTM1MS); | |
309 | ||
310 | /* Map on PCI side */ | |
311 | early_write_config_dword(hose, hose->first_busno, 0, | |
312 | PCI_BASE_ADDRESS_1, res->start); | |
313 | early_write_config_dword(hose, hose->first_busno, 0, | |
314 | PCI_BASE_ADDRESS_2, 0x00000000); | |
315 | early_write_config_word(hose, hose->first_busno, 0, | |
316 | PCI_COMMAND, 0x0006); | |
317 | } | |
318 | ||
5738ec6d BH |
319 | static void __init ppc4xx_probe_pci_bridge(struct device_node *np) |
320 | { | |
321 | /* NYI */ | |
c839e0ef BH |
322 | struct resource rsrc_cfg; |
323 | struct resource rsrc_reg; | |
324 | struct resource dma_window; | |
325 | struct pci_controller *hose = NULL; | |
326 | void __iomem *reg = NULL; | |
327 | const int *bus_range; | |
328 | int primary = 0; | |
329 | ||
5a013fc7 MF |
330 | /* Check if device is enabled */ |
331 | if (!of_device_is_available(np)) { | |
b7c670d6 | 332 | printk(KERN_INFO "%pOF: Port disabled via device-tree\n", np); |
5a013fc7 MF |
333 | return; |
334 | } | |
335 | ||
c839e0ef BH |
336 | /* Fetch config space registers address */ |
337 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { | |
b7c670d6 RH |
338 | printk(KERN_ERR "%pOF: Can't get PCI config register base !", |
339 | np); | |
c839e0ef BH |
340 | return; |
341 | } | |
342 | /* Fetch host bridge internal registers address */ | |
343 | if (of_address_to_resource(np, 3, &rsrc_reg)) { | |
b7c670d6 RH |
344 | printk(KERN_ERR "%pOF: Can't get PCI internal register base !", |
345 | np); | |
c839e0ef BH |
346 | return; |
347 | } | |
348 | ||
349 | /* Check if primary bridge */ | |
350 | if (of_get_property(np, "primary", NULL)) | |
351 | primary = 1; | |
352 | ||
353 | /* Get bus range if any */ | |
354 | bus_range = of_get_property(np, "bus-range", NULL); | |
355 | ||
356 | /* Map registers */ | |
28f65c11 | 357 | reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); |
c839e0ef | 358 | if (reg == NULL) { |
b7c670d6 | 359 | printk(KERN_ERR "%pOF: Can't map registers !", np); |
c839e0ef BH |
360 | goto fail; |
361 | } | |
362 | ||
363 | /* Allocate the host controller data structure */ | |
364 | hose = pcibios_alloc_controller(np); | |
365 | if (!hose) | |
366 | goto fail; | |
367 | ||
368 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
369 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
370 | ||
371 | /* Setup config space */ | |
372 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0); | |
373 | ||
374 | /* Disable all windows */ | |
375 | writel(0, reg + PCIL0_PMM0MA); | |
376 | writel(0, reg + PCIL0_PMM1MA); | |
377 | writel(0, reg + PCIL0_PMM2MA); | |
378 | writel(0, reg + PCIL0_PTM1MS); | |
379 | writel(0, reg + PCIL0_PTM2MS); | |
380 | ||
381 | /* Parse outbound mapping resources */ | |
382 | pci_process_bridge_OF_ranges(hose, np, primary); | |
383 | ||
384 | /* Parse inbound mapping resources */ | |
385 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) | |
386 | goto fail; | |
387 | ||
388 | /* Configure outbound ranges POMs */ | |
389 | ppc4xx_configure_pci_PMMs(hose, reg); | |
390 | ||
391 | /* Configure inbound ranges PIMs */ | |
392 | ppc4xx_configure_pci_PTMs(hose, reg, &dma_window); | |
393 | ||
394 | /* We don't need the registers anymore */ | |
395 | iounmap(reg); | |
396 | return; | |
397 | ||
398 | fail: | |
399 | if (hose) | |
400 | pcibios_free_controller(hose); | |
401 | if (reg) | |
402 | iounmap(reg); | |
5738ec6d BH |
403 | } |
404 | ||
405 | /* | |
406 | * 4xx PCI-X part | |
407 | */ | |
408 | ||
84d727a1 BH |
409 | static int __init ppc4xx_setup_one_pcix_POM(struct pci_controller *hose, |
410 | void __iomem *reg, | |
411 | u64 plb_addr, | |
412 | u64 pci_addr, | |
413 | u64 size, | |
414 | unsigned int flags, | |
415 | int index) | |
416 | { | |
417 | u32 lah, lal, pciah, pcial, sa; | |
418 | ||
419 | if (!is_power_of_2(size) || size < 0x1000 || | |
420 | (plb_addr & (size - 1)) != 0) { | |
b7c670d6 RH |
421 | printk(KERN_WARNING "%pOF: Resource out of range\n", |
422 | hose->dn); | |
84d727a1 BH |
423 | return -1; |
424 | } | |
425 | ||
426 | /* Calculate register values */ | |
427 | lah = RES_TO_U32_HIGH(plb_addr); | |
428 | lal = RES_TO_U32_LOW(plb_addr); | |
429 | pciah = RES_TO_U32_HIGH(pci_addr); | |
430 | pcial = RES_TO_U32_LOW(pci_addr); | |
431 | sa = (0xffffffffu << ilog2(size)) | 0x1; | |
432 | ||
433 | /* Program register values */ | |
434 | if (index == 0) { | |
435 | writel(lah, reg + PCIX0_POM0LAH); | |
436 | writel(lal, reg + PCIX0_POM0LAL); | |
437 | writel(pciah, reg + PCIX0_POM0PCIAH); | |
438 | writel(pcial, reg + PCIX0_POM0PCIAL); | |
439 | writel(sa, reg + PCIX0_POM0SA); | |
440 | } else { | |
441 | writel(lah, reg + PCIX0_POM1LAH); | |
442 | writel(lal, reg + PCIX0_POM1LAL); | |
443 | writel(pciah, reg + PCIX0_POM1PCIAH); | |
444 | writel(pcial, reg + PCIX0_POM1PCIAL); | |
445 | writel(sa, reg + PCIX0_POM1SA); | |
446 | } | |
447 | ||
448 | return 0; | |
449 | } | |
450 | ||
5738ec6d BH |
451 | static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose, |
452 | void __iomem *reg) | |
453 | { | |
84d727a1 | 454 | int i, j, found_isa_hole = 0; |
5738ec6d BH |
455 | |
456 | /* Setup outbound memory windows */ | |
457 | for (i = j = 0; i < 3; i++) { | |
458 | struct resource *res = &hose->mem_resources[i]; | |
3fd47f06 | 459 | resource_size_t offset = hose->mem_offset[i]; |
5738ec6d BH |
460 | |
461 | /* we only care about memory windows */ | |
462 | if (!(res->flags & IORESOURCE_MEM)) | |
463 | continue; | |
464 | if (j > 1) { | |
b7c670d6 | 465 | printk(KERN_WARNING "%pOF: Too many ranges\n", hose->dn); |
5738ec6d BH |
466 | break; |
467 | } | |
468 | ||
84d727a1 BH |
469 | /* Configure the resource */ |
470 | if (ppc4xx_setup_one_pcix_POM(hose, reg, | |
471 | res->start, | |
3fd47f06 | 472 | res->start - offset, |
28f65c11 | 473 | resource_size(res), |
84d727a1 BH |
474 | res->flags, |
475 | j) == 0) { | |
476 | j++; | |
477 | ||
478 | /* If the resource PCI address is 0 then we have our | |
479 | * ISA memory hole | |
480 | */ | |
3fd47f06 | 481 | if (res->start == offset) |
84d727a1 | 482 | found_isa_hole = 1; |
5738ec6d | 483 | } |
5738ec6d | 484 | } |
84d727a1 BH |
485 | |
486 | /* Handle ISA memory hole if not already covered */ | |
487 | if (j <= 1 && !found_isa_hole && hose->isa_mem_size) | |
488 | if (ppc4xx_setup_one_pcix_POM(hose, reg, hose->isa_mem_phys, 0, | |
489 | hose->isa_mem_size, 0, j) == 0) | |
b7c670d6 RH |
490 | printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", |
491 | hose->dn); | |
5738ec6d BH |
492 | } |
493 | ||
494 | static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose, | |
495 | void __iomem *reg, | |
496 | const struct resource *res, | |
497 | int big_pim, | |
498 | int enable_msi_hole) | |
499 | { | |
28f65c11 | 500 | resource_size_t size = resource_size(res); |
5738ec6d BH |
501 | u32 sa; |
502 | ||
503 | /* RAM is always at 0 */ | |
504 | writel(0x00000000, reg + PCIX0_PIM0LAH); | |
505 | writel(0x00000000, reg + PCIX0_PIM0LAL); | |
506 | ||
507 | /* Calculate window size */ | |
508 | sa = (0xffffffffu << ilog2(size)) | 1; | |
509 | sa |= 0x1; | |
510 | if (res->flags & IORESOURCE_PREFETCH) | |
511 | sa |= 0x2; | |
512 | if (enable_msi_hole) | |
513 | sa |= 0x4; | |
514 | writel(sa, reg + PCIX0_PIM0SA); | |
515 | if (big_pim) | |
516 | writel(0xffffffff, reg + PCIX0_PIM0SAH); | |
517 | ||
518 | /* Map on PCI side */ | |
519 | writel(0x00000000, reg + PCIX0_BAR0H); | |
520 | writel(res->start, reg + PCIX0_BAR0L); | |
521 | writew(0x0006, reg + PCIX0_COMMAND); | |
522 | } | |
523 | ||
524 | static void __init ppc4xx_probe_pcix_bridge(struct device_node *np) | |
525 | { | |
526 | struct resource rsrc_cfg; | |
527 | struct resource rsrc_reg; | |
528 | struct resource dma_window; | |
529 | struct pci_controller *hose = NULL; | |
530 | void __iomem *reg = NULL; | |
531 | const int *bus_range; | |
532 | int big_pim = 0, msi = 0, primary = 0; | |
533 | ||
534 | /* Fetch config space registers address */ | |
535 | if (of_address_to_resource(np, 0, &rsrc_cfg)) { | |
b7c670d6 RH |
536 | printk(KERN_ERR "%pOF: Can't get PCI-X config register base !", |
537 | np); | |
5738ec6d BH |
538 | return; |
539 | } | |
540 | /* Fetch host bridge internal registers address */ | |
541 | if (of_address_to_resource(np, 3, &rsrc_reg)) { | |
b7c670d6 RH |
542 | printk(KERN_ERR "%pOF: Can't get PCI-X internal register base !", |
543 | np); | |
5738ec6d BH |
544 | return; |
545 | } | |
546 | ||
547 | /* Check if it supports large PIMs (440GX) */ | |
548 | if (of_get_property(np, "large-inbound-windows", NULL)) | |
549 | big_pim = 1; | |
550 | ||
551 | /* Check if we should enable MSIs inbound hole */ | |
552 | if (of_get_property(np, "enable-msi-hole", NULL)) | |
553 | msi = 1; | |
554 | ||
555 | /* Check if primary bridge */ | |
556 | if (of_get_property(np, "primary", NULL)) | |
557 | primary = 1; | |
558 | ||
559 | /* Get bus range if any */ | |
560 | bus_range = of_get_property(np, "bus-range", NULL); | |
561 | ||
562 | /* Map registers */ | |
28f65c11 | 563 | reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg)); |
5738ec6d | 564 | if (reg == NULL) { |
b7c670d6 | 565 | printk(KERN_ERR "%pOF: Can't map registers !", np); |
5738ec6d BH |
566 | goto fail; |
567 | } | |
568 | ||
569 | /* Allocate the host controller data structure */ | |
570 | hose = pcibios_alloc_controller(np); | |
571 | if (!hose) | |
572 | goto fail; | |
573 | ||
574 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
575 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
576 | ||
577 | /* Setup config space */ | |
d234b3c3 SO |
578 | setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, |
579 | PPC_INDIRECT_TYPE_SET_CFG_TYPE); | |
5738ec6d BH |
580 | |
581 | /* Disable all windows */ | |
582 | writel(0, reg + PCIX0_POM0SA); | |
583 | writel(0, reg + PCIX0_POM1SA); | |
584 | writel(0, reg + PCIX0_POM2SA); | |
585 | writel(0, reg + PCIX0_PIM0SA); | |
586 | writel(0, reg + PCIX0_PIM1SA); | |
587 | writel(0, reg + PCIX0_PIM2SA); | |
588 | if (big_pim) { | |
589 | writel(0, reg + PCIX0_PIM0SAH); | |
590 | writel(0, reg + PCIX0_PIM2SAH); | |
591 | } | |
592 | ||
593 | /* Parse outbound mapping resources */ | |
594 | pci_process_bridge_OF_ranges(hose, np, primary); | |
595 | ||
596 | /* Parse inbound mapping resources */ | |
597 | if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0) | |
598 | goto fail; | |
599 | ||
600 | /* Configure outbound ranges POMs */ | |
601 | ppc4xx_configure_pcix_POMs(hose, reg); | |
602 | ||
603 | /* Configure inbound ranges PIMs */ | |
604 | ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi); | |
605 | ||
606 | /* We don't need the registers anymore */ | |
607 | iounmap(reg); | |
608 | return; | |
609 | ||
610 | fail: | |
611 | if (hose) | |
612 | pcibios_free_controller(hose); | |
613 | if (reg) | |
614 | iounmap(reg); | |
615 | } | |
616 | ||
a2d2e1ec BH |
617 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
618 | ||
5738ec6d BH |
619 | /* |
620 | * 4xx PCI-Express part | |
a2d2e1ec BH |
621 | * |
622 | * We support 3 parts currently based on the compatible property: | |
623 | * | |
accf5ef2 | 624 | * ibm,plb-pciex-440spe |
a2d2e1ec | 625 | * ibm,plb-pciex-405ex |
66b7e504 | 626 | * ibm,plb-pciex-460ex |
a2d2e1ec BH |
627 | * |
628 | * Anything else will be rejected for now as they are all subtly | |
629 | * different unfortunately. | |
630 | * | |
5738ec6d | 631 | */ |
a2d2e1ec | 632 | |
78994e24 | 633 | #define MAX_PCIE_BUS_MAPPED 0x40 |
a2d2e1ec BH |
634 | |
635 | struct ppc4xx_pciex_port | |
636 | { | |
637 | struct pci_controller *hose; | |
638 | struct device_node *node; | |
639 | unsigned int index; | |
640 | int endpoint; | |
035ee428 BH |
641 | int link; |
642 | int has_ibpre; | |
a2d2e1ec BH |
643 | unsigned int sdr_base; |
644 | dcr_host_t dcrs; | |
645 | struct resource cfg_space; | |
646 | struct resource utl_regs; | |
035ee428 | 647 | void __iomem *utl_base; |
a2d2e1ec BH |
648 | }; |
649 | ||
650 | static struct ppc4xx_pciex_port *ppc4xx_pciex_ports; | |
651 | static unsigned int ppc4xx_pciex_port_count; | |
652 | ||
653 | struct ppc4xx_pciex_hwops | |
654 | { | |
8115846e | 655 | bool want_sdr; |
a2d2e1ec BH |
656 | int (*core_init)(struct device_node *np); |
657 | int (*port_init_hw)(struct ppc4xx_pciex_port *port); | |
658 | int (*setup_utl)(struct ppc4xx_pciex_port *port); | |
112d1fe9 | 659 | void (*check_link)(struct ppc4xx_pciex_port *port); |
a2d2e1ec BH |
660 | }; |
661 | ||
662 | static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops; | |
663 | ||
112d1fe9 TB |
664 | static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port, |
665 | unsigned int sdr_offset, | |
666 | unsigned int mask, | |
667 | unsigned int value, | |
668 | int timeout_ms) | |
669 | { | |
670 | u32 val; | |
671 | ||
672 | while(timeout_ms--) { | |
673 | val = mfdcri(SDR0, port->sdr_base + sdr_offset); | |
674 | if ((val & mask) == value) { | |
675 | pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n", | |
676 | port->index, sdr_offset, timeout_ms, val); | |
677 | return 0; | |
678 | } | |
679 | msleep(1); | |
680 | } | |
681 | return -1; | |
682 | } | |
683 | ||
684 | static int __init ppc4xx_pciex_port_reset_sdr(struct ppc4xx_pciex_port *port) | |
685 | { | |
112d1fe9 TB |
686 | /* Wait for reset to complete */ |
687 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) { | |
688 | printk(KERN_WARNING "PCIE%d: PGRST failed\n", | |
689 | port->index); | |
690 | return -1; | |
691 | } | |
692 | return 0; | |
693 | } | |
694 | ||
883a805d | 695 | |
112d1fe9 TB |
696 | static void __init ppc4xx_pciex_check_link_sdr(struct ppc4xx_pciex_port *port) |
697 | { | |
a8e616b9 JB |
698 | printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); |
699 | ||
112d1fe9 TB |
700 | /* Check for card presence detect if supported, if not, just wait for |
701 | * link unconditionally. | |
702 | * | |
703 | * note that we don't fail if there is no link, we just filter out | |
704 | * config space accesses. That way, it will be easier to implement | |
705 | * hotplug later on. | |
706 | */ | |
707 | if (!port->has_ibpre || | |
708 | !ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, | |
709 | 1 << 28, 1 << 28, 100)) { | |
710 | printk(KERN_INFO | |
711 | "PCIE%d: Device detected, waiting for link...\n", | |
712 | port->index); | |
713 | if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP, | |
714 | 0x1000, 0x1000, 2000)) | |
715 | printk(KERN_WARNING | |
716 | "PCIE%d: Link up failed\n", port->index); | |
717 | else { | |
718 | printk(KERN_INFO | |
719 | "PCIE%d: link is up !\n", port->index); | |
720 | port->link = 1; | |
721 | } | |
722 | } else | |
723 | printk(KERN_INFO "PCIE%d: No device detected.\n", port->index); | |
724 | } | |
725 | ||
883a805d BH |
726 | #ifdef CONFIG_44x |
727 | ||
a2d2e1ec BH |
728 | /* Check various reset bits of the 440SPe PCIe core */ |
729 | static int __init ppc440spe_pciex_check_reset(struct device_node *np) | |
730 | { | |
731 | u32 valPE0, valPE1, valPE2; | |
732 | int err = 0; | |
733 | ||
734 | /* SDR0_PEGPLLLCT1 reset */ | |
735 | if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) { | |
736 | /* | |
737 | * the PCIe core was probably already initialised | |
738 | * by firmware - let's re-reset RCSSET regs | |
739 | * | |
740 | * -- Shouldn't we also re-reset the whole thing ? -- BenH | |
741 | */ | |
742 | pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n"); | |
743 | mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000); | |
744 | mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000); | |
745 | mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000); | |
746 | } | |
747 | ||
748 | valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET); | |
749 | valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET); | |
750 | valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET); | |
751 | ||
752 | /* SDR0_PExRCSSET rstgu */ | |
753 | if (!(valPE0 & 0x01000000) || | |
754 | !(valPE1 & 0x01000000) || | |
755 | !(valPE2 & 0x01000000)) { | |
756 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n"); | |
757 | err = -1; | |
758 | } | |
759 | ||
760 | /* SDR0_PExRCSSET rstdl */ | |
761 | if (!(valPE0 & 0x00010000) || | |
762 | !(valPE1 & 0x00010000) || | |
763 | !(valPE2 & 0x00010000)) { | |
764 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n"); | |
765 | err = -1; | |
766 | } | |
767 | ||
768 | /* SDR0_PExRCSSET rstpyn */ | |
769 | if ((valPE0 & 0x00001000) || | |
770 | (valPE1 & 0x00001000) || | |
771 | (valPE2 & 0x00001000)) { | |
772 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n"); | |
773 | err = -1; | |
774 | } | |
775 | ||
776 | /* SDR0_PExRCSSET hldplb */ | |
777 | if ((valPE0 & 0x10000000) || | |
778 | (valPE1 & 0x10000000) || | |
779 | (valPE2 & 0x10000000)) { | |
780 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n"); | |
781 | err = -1; | |
782 | } | |
783 | ||
784 | /* SDR0_PExRCSSET rdy */ | |
785 | if ((valPE0 & 0x00100000) || | |
786 | (valPE1 & 0x00100000) || | |
787 | (valPE2 & 0x00100000)) { | |
788 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n"); | |
789 | err = -1; | |
790 | } | |
791 | ||
792 | /* SDR0_PExRCSSET shutdown */ | |
793 | if ((valPE0 & 0x00000100) || | |
794 | (valPE1 & 0x00000100) || | |
795 | (valPE2 & 0x00000100)) { | |
796 | printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n"); | |
797 | err = -1; | |
798 | } | |
799 | ||
800 | return err; | |
801 | } | |
802 | ||
803 | /* Global PCIe core initializations for 440SPe core */ | |
804 | static int __init ppc440spe_pciex_core_init(struct device_node *np) | |
805 | { | |
806 | int time_out = 20; | |
807 | ||
808 | /* Set PLL clock receiver to LVPECL */ | |
6e42b21b | 809 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28); |
a2d2e1ec BH |
810 | |
811 | /* Shouldn't we do all the calibration stuff etc... here ? */ | |
812 | if (ppc440spe_pciex_check_reset(np)) | |
813 | return -ENXIO; | |
814 | ||
815 | if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) { | |
816 | printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration " | |
817 | "failed (0x%08x)\n", | |
818 | mfdcri(SDR0, PESDR0_PLLLCT2)); | |
819 | return -1; | |
820 | } | |
821 | ||
822 | /* De-assert reset of PCIe PLL, wait for lock */ | |
6e42b21b | 823 | dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0); |
a2d2e1ec BH |
824 | udelay(3); |
825 | ||
826 | while (time_out) { | |
827 | if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) { | |
828 | time_out--; | |
829 | udelay(1); | |
830 | } else | |
831 | break; | |
832 | } | |
833 | if (!time_out) { | |
834 | printk(KERN_INFO "PCIE: VCO output not locked\n"); | |
835 | return -1; | |
836 | } | |
837 | ||
838 | pr_debug("PCIE initialization OK\n"); | |
839 | ||
840 | return 3; | |
841 | } | |
842 | ||
9c57a32b | 843 | static int __init ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
a2d2e1ec BH |
844 | { |
845 | u32 val = 1 << 24; | |
846 | ||
847 | if (port->endpoint) | |
848 | val = PTYPE_LEGACY_ENDPOINT << 20; | |
849 | else | |
850 | val = PTYPE_ROOT_PORT << 20; | |
851 | ||
852 | if (port->index == 0) | |
853 | val |= LNKW_X8 << 12; | |
854 | else | |
855 | val |= LNKW_X4 << 12; | |
856 | ||
857 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); | |
858 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222); | |
accf5ef2 | 859 | if (ppc440spe_revA()) |
a2d2e1ec BH |
860 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000); |
861 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000); | |
862 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000); | |
863 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000); | |
864 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000); | |
865 | if (port->index == 0) { | |
866 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1, | |
867 | 0x35000000); | |
868 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1, | |
869 | 0x35000000); | |
870 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1, | |
871 | 0x35000000); | |
872 | mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1, | |
873 | 0x35000000); | |
874 | } | |
6e42b21b VB |
875 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, |
876 | (1 << 24) | (1 << 16), 1 << 12); | |
a2d2e1ec | 877 | |
112d1fe9 | 878 | return ppc4xx_pciex_port_reset_sdr(port); |
a2d2e1ec BH |
879 | } |
880 | ||
9c57a32b | 881 | static int __init ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
035ee428 BH |
882 | { |
883 | return ppc440spe_pciex_init_port_hw(port); | |
884 | } | |
885 | ||
9c57a32b | 886 | static int __init ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
a2d2e1ec | 887 | { |
035ee428 BH |
888 | int rc = ppc440spe_pciex_init_port_hw(port); |
889 | ||
890 | port->has_ibpre = 1; | |
891 | ||
892 | return rc; | |
893 | } | |
a2d2e1ec | 894 | |
035ee428 BH |
895 | static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port) |
896 | { | |
a2d2e1ec BH |
897 | /* XXX Check what that value means... I hate magic */ |
898 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800); | |
899 | ||
a2d2e1ec BH |
900 | /* |
901 | * Set buffer allocations and then assert VRB and TXE. | |
902 | */ | |
035ee428 BH |
903 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); |
904 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
905 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000); | |
906 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000); | |
907 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000); | |
908 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000); | |
909 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); | |
910 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
a2d2e1ec | 911 | |
035ee428 BH |
912 | return 0; |
913 | } | |
914 | ||
915 | static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
916 | { | |
917 | /* Report CRS to the operating system */ | |
918 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); | |
a2d2e1ec BH |
919 | |
920 | return 0; | |
921 | } | |
922 | ||
923 | static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata = | |
924 | { | |
8115846e | 925 | .want_sdr = true, |
a2d2e1ec | 926 | .core_init = ppc440spe_pciex_core_init, |
035ee428 | 927 | .port_init_hw = ppc440speA_pciex_init_port_hw, |
a2d2e1ec | 928 | .setup_utl = ppc440speA_pciex_init_utl, |
112d1fe9 | 929 | .check_link = ppc4xx_pciex_check_link_sdr, |
a2d2e1ec BH |
930 | }; |
931 | ||
932 | static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata = | |
933 | { | |
8115846e | 934 | .want_sdr = true, |
a2d2e1ec | 935 | .core_init = ppc440spe_pciex_core_init, |
035ee428 BH |
936 | .port_init_hw = ppc440speB_pciex_init_port_hw, |
937 | .setup_utl = ppc440speB_pciex_init_utl, | |
112d1fe9 | 938 | .check_link = ppc4xx_pciex_check_link_sdr, |
a2d2e1ec BH |
939 | }; |
940 | ||
66b7e504 SR |
941 | static int __init ppc460ex_pciex_core_init(struct device_node *np) |
942 | { | |
943 | /* Nothing to do, return 2 ports */ | |
944 | return 2; | |
945 | } | |
946 | ||
9c57a32b | 947 | static int __init ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
66b7e504 SR |
948 | { |
949 | u32 val; | |
950 | u32 utlset1; | |
951 | ||
5f91925c | 952 | if (port->endpoint) |
66b7e504 | 953 | val = PTYPE_LEGACY_ENDPOINT << 20; |
5f91925c | 954 | else |
66b7e504 | 955 | val = PTYPE_ROOT_PORT << 20; |
66b7e504 SR |
956 | |
957 | if (port->index == 0) { | |
958 | val |= LNKW_X1 << 12; | |
5f91925c | 959 | utlset1 = 0x20000000; |
66b7e504 SR |
960 | } else { |
961 | val |= LNKW_X4 << 12; | |
5f91925c | 962 | utlset1 = 0x20101101; |
66b7e504 SR |
963 | } |
964 | ||
965 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); | |
966 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1); | |
967 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000); | |
968 | ||
969 | switch (port->index) { | |
970 | case 0: | |
971 | mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); | |
e30c9875 | 972 | mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); |
66b7e504 SR |
973 | mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); |
974 | ||
975 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000); | |
976 | break; | |
977 | ||
978 | case 1: | |
979 | mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230); | |
980 | mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230); | |
981 | mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230); | |
982 | mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230); | |
e30c9875 TM |
983 | mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130); |
984 | mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130); | |
985 | mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130); | |
986 | mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130); | |
66b7e504 SR |
987 | mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006); |
988 | mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006); | |
989 | mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006); | |
990 | mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006); | |
991 | ||
992 | mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000); | |
993 | break; | |
994 | } | |
995 | ||
996 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
997 | mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | | |
998 | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); | |
999 | ||
1000 | /* Poll for PHY reset */ | |
1001 | /* XXX FIXME add timeout */ | |
1002 | switch (port->index) { | |
1003 | case 0: | |
1004 | while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1)) | |
1005 | udelay(10); | |
1006 | break; | |
1007 | case 1: | |
1008 | while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1)) | |
1009 | udelay(10); | |
1010 | break; | |
1011 | } | |
1012 | ||
1013 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
1014 | (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & | |
1015 | ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | | |
1016 | PESDRx_RCSSET_RSTPYN); | |
1017 | ||
1018 | port->has_ibpre = 1; | |
1019 | ||
112d1fe9 | 1020 | return ppc4xx_pciex_port_reset_sdr(port); |
66b7e504 SR |
1021 | } |
1022 | ||
1023 | static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
1024 | { | |
1025 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); | |
1026 | ||
1027 | /* | |
1028 | * Set buffer allocations and then assert VRB and TXE. | |
1029 | */ | |
1030 | out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c); | |
1031 | out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000); | |
1032 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
1033 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); | |
1034 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000); | |
1035 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); | |
1036 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); | |
1037 | out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000); | |
1038 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata = | |
1044 | { | |
8115846e | 1045 | .want_sdr = true, |
66b7e504 SR |
1046 | .core_init = ppc460ex_pciex_core_init, |
1047 | .port_init_hw = ppc460ex_pciex_init_port_hw, | |
1048 | .setup_utl = ppc460ex_pciex_init_utl, | |
112d1fe9 | 1049 | .check_link = ppc4xx_pciex_check_link_sdr, |
66b7e504 SR |
1050 | }; |
1051 | ||
b6bb23b9 VNHT |
1052 | static int __init apm821xx_pciex_core_init(struct device_node *np) |
1053 | { | |
1054 | /* Return the number of pcie port */ | |
1055 | return 1; | |
1056 | } | |
1057 | ||
e4565362 | 1058 | static int __init apm821xx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
b6bb23b9 VNHT |
1059 | { |
1060 | u32 val; | |
1061 | ||
1062 | /* | |
1063 | * Do a software reset on PCIe ports. | |
1064 | * This code is to fix the issue that pci drivers doesn't re-assign | |
1065 | * bus number for PCIE devices after Uboot | |
1066 | * scanned and configured all the buses (eg. PCIE NIC IntelPro/1000 | |
1067 | * PT quad port, SAS LSI 1064E) | |
1068 | */ | |
1069 | ||
1070 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x0); | |
1071 | mdelay(10); | |
1072 | ||
1073 | if (port->endpoint) | |
1074 | val = PTYPE_LEGACY_ENDPOINT << 20; | |
1075 | else | |
1076 | val = PTYPE_ROOT_PORT << 20; | |
1077 | ||
1078 | val |= LNKW_X1 << 12; | |
1079 | ||
1080 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val); | |
1081 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); | |
1082 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); | |
1083 | ||
1084 | mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230); | |
1085 | mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130); | |
1086 | mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006); | |
1087 | ||
1088 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x10000000); | |
1089 | mdelay(50); | |
1090 | mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST, 0x30000000); | |
1091 | ||
1092 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
1093 | mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) | | |
1094 | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN)); | |
1095 | ||
1096 | /* Poll for PHY reset */ | |
1097 | val = PESDR0_460EX_RSTSTA - port->sdr_base; | |
1098 | if (ppc4xx_pciex_wait_on_sdr(port, val, 0x1, 1, 100)) { | |
1099 | printk(KERN_WARNING "%s: PCIE: Can't reset PHY\n", __func__); | |
1100 | return -EBUSY; | |
1101 | } else { | |
1102 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, | |
1103 | (mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) & | |
1104 | ~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) | | |
1105 | PESDRx_RCSSET_RSTPYN); | |
1106 | ||
1107 | port->has_ibpre = 1; | |
1108 | return 0; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | static struct ppc4xx_pciex_hwops apm821xx_pcie_hwops __initdata = { | |
1113 | .want_sdr = true, | |
1114 | .core_init = apm821xx_pciex_core_init, | |
1115 | .port_init_hw = apm821xx_pciex_init_port_hw, | |
1116 | .setup_utl = ppc460ex_pciex_init_utl, | |
1117 | .check_link = ppc4xx_pciex_check_link_sdr, | |
1118 | }; | |
1119 | ||
e2efc09e TM |
1120 | static int __init ppc460sx_pciex_core_init(struct device_node *np) |
1121 | { | |
1122 | /* HSS drive amplitude */ | |
1123 | mtdcri(SDR0, PESDR0_460SX_HSSL0DAMP, 0xB9843211); | |
1124 | mtdcri(SDR0, PESDR0_460SX_HSSL1DAMP, 0xB9843211); | |
1125 | mtdcri(SDR0, PESDR0_460SX_HSSL2DAMP, 0xB9843211); | |
1126 | mtdcri(SDR0, PESDR0_460SX_HSSL3DAMP, 0xB9843211); | |
1127 | mtdcri(SDR0, PESDR0_460SX_HSSL4DAMP, 0xB9843211); | |
1128 | mtdcri(SDR0, PESDR0_460SX_HSSL5DAMP, 0xB9843211); | |
1129 | mtdcri(SDR0, PESDR0_460SX_HSSL6DAMP, 0xB9843211); | |
1130 | mtdcri(SDR0, PESDR0_460SX_HSSL7DAMP, 0xB9843211); | |
1131 | ||
1132 | mtdcri(SDR0, PESDR1_460SX_HSSL0DAMP, 0xB9843211); | |
1133 | mtdcri(SDR0, PESDR1_460SX_HSSL1DAMP, 0xB9843211); | |
1134 | mtdcri(SDR0, PESDR1_460SX_HSSL2DAMP, 0xB9843211); | |
1135 | mtdcri(SDR0, PESDR1_460SX_HSSL3DAMP, 0xB9843211); | |
1136 | ||
1137 | mtdcri(SDR0, PESDR2_460SX_HSSL0DAMP, 0xB9843211); | |
1138 | mtdcri(SDR0, PESDR2_460SX_HSSL1DAMP, 0xB9843211); | |
1139 | mtdcri(SDR0, PESDR2_460SX_HSSL2DAMP, 0xB9843211); | |
1140 | mtdcri(SDR0, PESDR2_460SX_HSSL3DAMP, 0xB9843211); | |
1141 | ||
1142 | /* HSS TX pre-emphasis */ | |
1143 | mtdcri(SDR0, PESDR0_460SX_HSSL0COEFA, 0xDCB98987); | |
1144 | mtdcri(SDR0, PESDR0_460SX_HSSL1COEFA, 0xDCB98987); | |
1145 | mtdcri(SDR0, PESDR0_460SX_HSSL2COEFA, 0xDCB98987); | |
1146 | mtdcri(SDR0, PESDR0_460SX_HSSL3COEFA, 0xDCB98987); | |
1147 | mtdcri(SDR0, PESDR0_460SX_HSSL4COEFA, 0xDCB98987); | |
1148 | mtdcri(SDR0, PESDR0_460SX_HSSL5COEFA, 0xDCB98987); | |
1149 | mtdcri(SDR0, PESDR0_460SX_HSSL6COEFA, 0xDCB98987); | |
1150 | mtdcri(SDR0, PESDR0_460SX_HSSL7COEFA, 0xDCB98987); | |
1151 | ||
1152 | mtdcri(SDR0, PESDR1_460SX_HSSL0COEFA, 0xDCB98987); | |
1153 | mtdcri(SDR0, PESDR1_460SX_HSSL1COEFA, 0xDCB98987); | |
1154 | mtdcri(SDR0, PESDR1_460SX_HSSL2COEFA, 0xDCB98987); | |
1155 | mtdcri(SDR0, PESDR1_460SX_HSSL3COEFA, 0xDCB98987); | |
1156 | ||
1157 | mtdcri(SDR0, PESDR2_460SX_HSSL0COEFA, 0xDCB98987); | |
1158 | mtdcri(SDR0, PESDR2_460SX_HSSL1COEFA, 0xDCB98987); | |
1159 | mtdcri(SDR0, PESDR2_460SX_HSSL2COEFA, 0xDCB98987); | |
1160 | mtdcri(SDR0, PESDR2_460SX_HSSL3COEFA, 0xDCB98987); | |
1161 | ||
1162 | /* HSS TX calibration control */ | |
1163 | mtdcri(SDR0, PESDR0_460SX_HSSL1CALDRV, 0x22222222); | |
1164 | mtdcri(SDR0, PESDR1_460SX_HSSL1CALDRV, 0x22220000); | |
1165 | mtdcri(SDR0, PESDR2_460SX_HSSL1CALDRV, 0x22220000); | |
1166 | ||
1167 | /* HSS TX slew control */ | |
1168 | mtdcri(SDR0, PESDR0_460SX_HSSSLEW, 0xFFFFFFFF); | |
1169 | mtdcri(SDR0, PESDR1_460SX_HSSSLEW, 0xFFFF0000); | |
1170 | mtdcri(SDR0, PESDR2_460SX_HSSSLEW, 0xFFFF0000); | |
1171 | ||
e7fa1d13 AEK |
1172 | /* Set HSS PRBS enabled */ |
1173 | mtdcri(SDR0, PESDR0_460SX_HSSCTLSET, 0x00001130); | |
1174 | mtdcri(SDR0, PESDR2_460SX_HSSCTLSET, 0x00001130); | |
1175 | ||
e2efc09e TM |
1176 | udelay(100); |
1177 | ||
1178 | /* De-assert PLLRESET */ | |
1179 | dcri_clrset(SDR0, PESDR0_PLLLCT2, 0x00000100, 0); | |
1180 | ||
1181 | /* Reset DL, UTL, GPL before configuration */ | |
1182 | mtdcri(SDR0, PESDR0_460SX_RCSSET, | |
1183 | PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); | |
1184 | mtdcri(SDR0, PESDR1_460SX_RCSSET, | |
1185 | PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); | |
1186 | mtdcri(SDR0, PESDR2_460SX_RCSSET, | |
1187 | PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU); | |
1188 | ||
1189 | udelay(100); | |
1190 | ||
1191 | /* | |
1192 | * If bifurcation is not enabled, u-boot would have disabled the | |
1193 | * third PCIe port | |
1194 | */ | |
1195 | if (((mfdcri(SDR0, PESDR1_460SX_HSSCTLSET) & 0x00000001) == | |
1196 | 0x00000001)) { | |
1197 | printk(KERN_INFO "PCI: PCIE bifurcation setup successfully.\n"); | |
1198 | printk(KERN_INFO "PCI: Total 3 PCIE ports are present\n"); | |
1199 | return 3; | |
1200 | } | |
1201 | ||
1202 | printk(KERN_INFO "PCI: Total 2 PCIE ports are present\n"); | |
1203 | return 2; | |
1204 | } | |
1205 | ||
9c57a32b | 1206 | static int __init ppc460sx_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
e2efc09e TM |
1207 | { |
1208 | ||
1209 | if (port->endpoint) | |
1210 | dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, | |
1211 | 0x01000000, 0); | |
1212 | else | |
1213 | dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2, | |
1214 | 0, 0x01000000); | |
1215 | ||
e2efc09e TM |
1216 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, |
1217 | (PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL), | |
1218 | PESDRx_RCSSET_RSTPYN); | |
1219 | ||
1220 | port->has_ibpre = 1; | |
1221 | ||
112d1fe9 | 1222 | return ppc4xx_pciex_port_reset_sdr(port); |
e2efc09e TM |
1223 | } |
1224 | ||
1225 | static int ppc460sx_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
1226 | { | |
1227 | /* Max 128 Bytes */ | |
1228 | out_be32 (port->utl_base + PEUTL_PBBSZ, 0x00000000); | |
e7fa1d13 AEK |
1229 | /* Assert VRB and TXE - per datasheet turn off addr validation */ |
1230 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800000); | |
e2efc09e TM |
1231 | return 0; |
1232 | } | |
1233 | ||
e7fa1d13 AEK |
1234 | static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port) |
1235 | { | |
1236 | void __iomem *mbase; | |
1237 | int attempt = 50; | |
1238 | ||
1239 | port->link = 0; | |
1240 | ||
1241 | mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); | |
1242 | if (mbase == NULL) { | |
b7c670d6 RH |
1243 | printk(KERN_ERR "%pOF: Can't map internal config space !", |
1244 | port->node); | |
e7fa1d13 AEK |
1245 | goto done; |
1246 | } | |
1247 | ||
1248 | while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA) | |
1249 | & PECFG_460SX_DLLSTA_LINKUP))) { | |
1250 | attempt--; | |
1251 | mdelay(10); | |
1252 | } | |
1253 | if (attempt) | |
1254 | port->link = 1; | |
1255 | done: | |
1256 | iounmap(mbase); | |
1257 | ||
1258 | } | |
1259 | ||
e2efc09e | 1260 | static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = { |
8115846e | 1261 | .want_sdr = true, |
e2efc09e TM |
1262 | .core_init = ppc460sx_pciex_core_init, |
1263 | .port_init_hw = ppc460sx_pciex_init_port_hw, | |
1264 | .setup_utl = ppc460sx_pciex_init_utl, | |
e7fa1d13 | 1265 | .check_link = ppc460sx_pciex_check_link, |
e2efc09e TM |
1266 | }; |
1267 | ||
a2d2e1ec BH |
1268 | #endif /* CONFIG_44x */ |
1269 | ||
1270 | #ifdef CONFIG_40x | |
1271 | ||
1272 | static int __init ppc405ex_pciex_core_init(struct device_node *np) | |
1273 | { | |
1274 | /* Nothing to do, return 2 ports */ | |
1275 | return 2; | |
1276 | } | |
1277 | ||
1278 | static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port) | |
1279 | { | |
1280 | /* Assert the PE0_PHY reset */ | |
1281 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000); | |
1282 | msleep(1); | |
1283 | ||
1284 | /* deassert the PE0_hotreset */ | |
1285 | if (port->endpoint) | |
1286 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000); | |
1287 | else | |
1288 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000); | |
1289 | ||
1290 | /* poll for phy !reset */ | |
1291 | /* XXX FIXME add timeout */ | |
1292 | while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000)) | |
1293 | ; | |
1294 | ||
1295 | /* deassert the PE0_gpl_utl_reset */ | |
1296 | mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000); | |
1297 | } | |
1298 | ||
9c57a32b | 1299 | static int __init ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port) |
a2d2e1ec BH |
1300 | { |
1301 | u32 val; | |
1302 | ||
1303 | if (port->endpoint) | |
1304 | val = PTYPE_LEGACY_ENDPOINT; | |
1305 | else | |
1306 | val = PTYPE_ROOT_PORT; | |
1307 | ||
1308 | mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, | |
1309 | 1 << 24 | val << 20 | LNKW_X1 << 12); | |
1310 | ||
1311 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000); | |
1312 | mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000); | |
1313 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000); | |
1314 | mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003); | |
1315 | ||
1316 | /* | |
1317 | * Only reset the PHY when no link is currently established. | |
1318 | * This is for the Atheros PCIe board which has problems to establish | |
1319 | * the link (again) after this PHY reset. All other currently tested | |
1320 | * PCIe boards don't show this problem. | |
1321 | * This has to be re-tested and fixed in a later release! | |
1322 | */ | |
a2d2e1ec BH |
1323 | val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP); |
1324 | if (!(val & 0x00001000)) | |
1325 | ppc405ex_pcie_phy_reset(port); | |
a2d2e1ec BH |
1326 | |
1327 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */ | |
1328 | ||
55aaf6ec SR |
1329 | port->has_ibpre = 1; |
1330 | ||
112d1fe9 | 1331 | return ppc4xx_pciex_port_reset_sdr(port); |
a2d2e1ec BH |
1332 | } |
1333 | ||
1334 | static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port) | |
1335 | { | |
a2d2e1ec BH |
1336 | dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0); |
1337 | ||
a2d2e1ec BH |
1338 | /* |
1339 | * Set buffer allocations and then assert VRB and TXE. | |
1340 | */ | |
035ee428 BH |
1341 | out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000); |
1342 | out_be32(port->utl_base + PEUTL_INTR, 0x02000000); | |
1343 | out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000); | |
1344 | out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000); | |
1345 | out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000); | |
1346 | out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000); | |
1347 | out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000); | |
1348 | out_be32(port->utl_base + PEUTL_PCTL, 0x80800066); | |
a2d2e1ec | 1349 | |
035ee428 | 1350 | out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000); |
a2d2e1ec BH |
1351 | |
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata = | |
1356 | { | |
8115846e | 1357 | .want_sdr = true, |
a2d2e1ec BH |
1358 | .core_init = ppc405ex_pciex_core_init, |
1359 | .port_init_hw = ppc405ex_pciex_init_port_hw, | |
1360 | .setup_utl = ppc405ex_pciex_init_utl, | |
112d1fe9 | 1361 | .check_link = ppc4xx_pciex_check_link_sdr, |
a2d2e1ec BH |
1362 | }; |
1363 | ||
1364 | #endif /* CONFIG_40x */ | |
1365 | ||
df777bd3 TB |
1366 | #ifdef CONFIG_476FPE |
1367 | static int __init ppc_476fpe_pciex_core_init(struct device_node *np) | |
1368 | { | |
1369 | return 4; | |
1370 | } | |
1371 | ||
1372 | static void __init ppc_476fpe_pciex_check_link(struct ppc4xx_pciex_port *port) | |
1373 | { | |
1374 | u32 timeout_ms = 20; | |
1375 | u32 val = 0, mask = (PECFG_TLDLP_LNKUP|PECFG_TLDLP_PRESENT); | |
1376 | void __iomem *mbase = ioremap(port->cfg_space.start + 0x10000000, | |
1377 | 0x1000); | |
1378 | ||
1379 | printk(KERN_INFO "PCIE%d: Checking link...\n", port->index); | |
1380 | ||
1381 | if (mbase == NULL) { | |
1382 | printk(KERN_WARNING "PCIE%d: failed to get cfg space\n", | |
1383 | port->index); | |
1384 | return; | |
1385 | } | |
b7c670d6 | 1386 | |
df777bd3 TB |
1387 | while (timeout_ms--) { |
1388 | val = in_le32(mbase + PECFG_TLDLP); | |
1389 | ||
1390 | if ((val & mask) == mask) | |
1391 | break; | |
1392 | msleep(10); | |
1393 | } | |
1394 | ||
1395 | if (val & PECFG_TLDLP_PRESENT) { | |
1396 | printk(KERN_INFO "PCIE%d: link is up !\n", port->index); | |
1397 | port->link = 1; | |
1398 | } else | |
1399 | printk(KERN_WARNING "PCIE%d: Link up failed\n", port->index); | |
1400 | ||
1401 | iounmap(mbase); | |
df777bd3 TB |
1402 | } |
1403 | ||
1404 | static struct ppc4xx_pciex_hwops ppc_476fpe_pcie_hwops __initdata = | |
1405 | { | |
1406 | .core_init = ppc_476fpe_pciex_core_init, | |
1407 | .check_link = ppc_476fpe_pciex_check_link, | |
1408 | }; | |
1409 | #endif /* CONFIG_476FPE */ | |
1410 | ||
a2d2e1ec BH |
1411 | /* Check that the core has been initied and if not, do it */ |
1412 | static int __init ppc4xx_pciex_check_core_init(struct device_node *np) | |
1413 | { | |
1414 | static int core_init; | |
1415 | int count = -ENODEV; | |
1416 | ||
1417 | if (core_init++) | |
1418 | return 0; | |
1419 | ||
1420 | #ifdef CONFIG_44x | |
accf5ef2 SR |
1421 | if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) { |
1422 | if (ppc440spe_revA()) | |
1423 | ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops; | |
1424 | else | |
1425 | ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops; | |
1426 | } | |
66b7e504 SR |
1427 | if (of_device_is_compatible(np, "ibm,plb-pciex-460ex")) |
1428 | ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops; | |
e2efc09e TM |
1429 | if (of_device_is_compatible(np, "ibm,plb-pciex-460sx")) |
1430 | ppc4xx_pciex_hwops = &ppc460sx_pcie_hwops; | |
b6bb23b9 VNHT |
1431 | if (of_device_is_compatible(np, "ibm,plb-pciex-apm821xx")) |
1432 | ppc4xx_pciex_hwops = &apm821xx_pcie_hwops; | |
a2d2e1ec BH |
1433 | #endif /* CONFIG_44x */ |
1434 | #ifdef CONFIG_40x | |
1435 | if (of_device_is_compatible(np, "ibm,plb-pciex-405ex")) | |
1436 | ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops; | |
df777bd3 TB |
1437 | #endif |
1438 | #ifdef CONFIG_476FPE | |
2a2c74b2 AP |
1439 | if (of_device_is_compatible(np, "ibm,plb-pciex-476fpe") |
1440 | || of_device_is_compatible(np, "ibm,plb-pciex-476gtr")) | |
df777bd3 | 1441 | ppc4xx_pciex_hwops = &ppc_476fpe_pcie_hwops; |
a2d2e1ec BH |
1442 | #endif |
1443 | if (ppc4xx_pciex_hwops == NULL) { | |
b7c670d6 | 1444 | printk(KERN_WARNING "PCIE: unknown host type %pOF\n", np); |
a2d2e1ec BH |
1445 | return -ENODEV; |
1446 | } | |
1447 | ||
1448 | count = ppc4xx_pciex_hwops->core_init(np); | |
1449 | if (count > 0) { | |
1450 | ppc4xx_pciex_ports = | |
6396bb22 | 1451 | kcalloc(count, sizeof(struct ppc4xx_pciex_port), |
a2d2e1ec BH |
1452 | GFP_KERNEL); |
1453 | if (ppc4xx_pciex_ports) { | |
1454 | ppc4xx_pciex_port_count = count; | |
1455 | return 0; | |
1456 | } | |
1457 | printk(KERN_WARNING "PCIE: failed to allocate ports array\n"); | |
1458 | return -ENOMEM; | |
1459 | } | |
1460 | return -ENODEV; | |
1461 | } | |
1462 | ||
1463 | static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port) | |
1464 | { | |
1465 | /* We map PCI Express configuration based on the reg property */ | |
1466 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH, | |
1467 | RES_TO_U32_HIGH(port->cfg_space.start)); | |
1468 | dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL, | |
1469 | RES_TO_U32_LOW(port->cfg_space.start)); | |
1470 | ||
1471 | /* XXX FIXME: Use size from reg property. For now, map 512M */ | |
1472 | dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001); | |
1473 | ||
1474 | /* We map UTL registers based on the reg property */ | |
1475 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAH, | |
1476 | RES_TO_U32_HIGH(port->utl_regs.start)); | |
1477 | dcr_write(port->dcrs, DCRO_PEGPL_REGBAL, | |
1478 | RES_TO_U32_LOW(port->utl_regs.start)); | |
1479 | ||
1480 | /* XXX FIXME: Use size from reg property */ | |
1481 | dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001); | |
1482 | ||
1483 | /* Disable all other outbound windows */ | |
1484 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0); | |
1485 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0); | |
1486 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0); | |
1487 | dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0); | |
1488 | } | |
1489 | ||
035ee428 BH |
1490 | static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port) |
1491 | { | |
1492 | int rc = 0; | |
a2d2e1ec BH |
1493 | |
1494 | /* Init HW */ | |
1495 | if (ppc4xx_pciex_hwops->port_init_hw) | |
1496 | rc = ppc4xx_pciex_hwops->port_init_hw(port); | |
1497 | if (rc != 0) | |
1498 | return rc; | |
1499 | ||
a2d2e1ec BH |
1500 | /* |
1501 | * Initialize mapping: disable all regions and configure | |
1502 | * CFG and REG regions based on resources in the device tree | |
1503 | */ | |
1504 | ppc4xx_pciex_port_init_mapping(port); | |
1505 | ||
e7fa1d13 AEK |
1506 | if (ppc4xx_pciex_hwops->check_link) |
1507 | ppc4xx_pciex_hwops->check_link(port); | |
1508 | ||
a2d2e1ec | 1509 | /* |
035ee428 BH |
1510 | * Map UTL |
1511 | */ | |
1512 | port->utl_base = ioremap(port->utl_regs.start, 0x100); | |
1513 | BUG_ON(port->utl_base == NULL); | |
1514 | ||
1515 | /* | |
1516 | * Setup UTL registers --BenH. | |
a2d2e1ec BH |
1517 | */ |
1518 | if (ppc4xx_pciex_hwops->setup_utl) | |
1519 | ppc4xx_pciex_hwops->setup_utl(port); | |
1520 | ||
1521 | /* | |
e7fa1d13 | 1522 | * Check for VC0 active or PLL Locked and assert RDY. |
a2d2e1ec | 1523 | */ |
112d1fe9 | 1524 | if (port->sdr_base) { |
e7fa1d13 AEK |
1525 | if (of_device_is_compatible(port->node, |
1526 | "ibm,plb-pciex-460sx")){ | |
1527 | if (port->link && ppc4xx_pciex_wait_on_sdr(port, | |
1528 | PESDRn_RCSSTS, | |
1529 | 1 << 12, 1 << 12, 5000)) { | |
1530 | printk(KERN_INFO "PCIE%d: PLL not locked\n", | |
1531 | port->index); | |
1532 | port->link = 0; | |
1533 | } | |
1534 | } else if (port->link && | |
1535 | ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, | |
1536 | 1 << 16, 1 << 16, 5000)) { | |
1537 | printk(KERN_INFO "PCIE%d: VC0 not active\n", | |
1538 | port->index); | |
112d1fe9 TB |
1539 | port->link = 0; |
1540 | } | |
1541 | ||
1542 | dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20); | |
a2d2e1ec | 1543 | } |
035ee428 | 1544 | |
a2d2e1ec BH |
1545 | msleep(100); |
1546 | ||
1547 | return 0; | |
1548 | } | |
1549 | ||
1550 | static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port, | |
1551 | struct pci_bus *bus, | |
1552 | unsigned int devfn) | |
1553 | { | |
1554 | static int message; | |
1555 | ||
1556 | /* Endpoint can not generate upstream(remote) config cycles */ | |
1557 | if (port->endpoint && bus->number != port->hose->first_busno) | |
1558 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1559 | ||
1560 | /* Check we are within the mapped range */ | |
1561 | if (bus->number > port->hose->last_busno) { | |
1562 | if (!message) { | |
1563 | printk(KERN_WARNING "Warning! Probing bus %u" | |
1564 | " out of range !\n", bus->number); | |
1565 | message++; | |
1566 | } | |
1567 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1568 | } | |
1569 | ||
1570 | /* The root complex has only one device / function */ | |
1571 | if (bus->number == port->hose->first_busno && devfn != 0) | |
1572 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1573 | ||
1574 | /* The other side of the RC has only one device as well */ | |
1575 | if (bus->number == (port->hose->first_busno + 1) && | |
1576 | PCI_SLOT(devfn) != 0) | |
1577 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1578 | ||
035ee428 BH |
1579 | /* Check if we have a link */ |
1580 | if ((bus->number != port->hose->first_busno) && !port->link) | |
1581 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1582 | ||
a2d2e1ec BH |
1583 | return 0; |
1584 | } | |
1585 | ||
1586 | static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port, | |
1587 | struct pci_bus *bus, | |
1588 | unsigned int devfn) | |
1589 | { | |
1590 | int relbus; | |
1591 | ||
1592 | /* Remove the casts when we finally remove the stupid volatile | |
1593 | * in struct pci_controller | |
1594 | */ | |
1595 | if (bus->number == port->hose->first_busno) | |
1596 | return (void __iomem *)port->hose->cfg_addr; | |
1597 | ||
1598 | relbus = bus->number - (port->hose->first_busno + 1); | |
1599 | return (void __iomem *)port->hose->cfg_data + | |
1600 | ((relbus << 20) | (devfn << 12)); | |
1601 | } | |
1602 | ||
1603 | static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn, | |
1604 | int offset, int len, u32 *val) | |
1605 | { | |
f159edae | 1606 | struct pci_controller *hose = pci_bus_to_host(bus); |
a2d2e1ec BH |
1607 | struct ppc4xx_pciex_port *port = |
1608 | &ppc4xx_pciex_ports[hose->indirect_type]; | |
1609 | void __iomem *addr; | |
1610 | u32 gpl_cfg; | |
1611 | ||
1612 | BUG_ON(hose != port->hose); | |
1613 | ||
1614 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) | |
1615 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1616 | ||
1617 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); | |
1618 | ||
1619 | /* | |
1620 | * Reading from configuration space of non-existing device can | |
1621 | * generate transaction errors. For the read duration we suppress | |
1622 | * assertion of machine check exceptions to avoid those. | |
1623 | */ | |
1624 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); | |
1625 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); | |
1626 | ||
035ee428 BH |
1627 | /* Make sure no CRS is recorded */ |
1628 | out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000); | |
1629 | ||
a2d2e1ec BH |
1630 | switch (len) { |
1631 | case 1: | |
1632 | *val = in_8((u8 *)(addr + offset)); | |
1633 | break; | |
1634 | case 2: | |
1635 | *val = in_le16((u16 *)(addr + offset)); | |
1636 | break; | |
1637 | default: | |
1638 | *val = in_le32((u32 *)(addr + offset)); | |
1639 | break; | |
1640 | } | |
1641 | ||
1642 | pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x" | |
1643 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", | |
1644 | bus->number, hose->first_busno, hose->last_busno, | |
1645 | devfn, offset, len, addr + offset, *val); | |
1646 | ||
035ee428 BH |
1647 | /* Check for CRS (440SPe rev B does that for us but heh ..) */ |
1648 | if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) { | |
1649 | pr_debug("Got CRS !\n"); | |
1650 | if (len != 4 || offset != 0) | |
1651 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1652 | *val = 0xffff0001; | |
1653 | } | |
1654 | ||
a2d2e1ec BH |
1655 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); |
1656 | ||
1657 | return PCIBIOS_SUCCESSFUL; | |
1658 | } | |
1659 | ||
1660 | static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn, | |
1661 | int offset, int len, u32 val) | |
1662 | { | |
f159edae | 1663 | struct pci_controller *hose = pci_bus_to_host(bus); |
a2d2e1ec BH |
1664 | struct ppc4xx_pciex_port *port = |
1665 | &ppc4xx_pciex_ports[hose->indirect_type]; | |
1666 | void __iomem *addr; | |
1667 | u32 gpl_cfg; | |
1668 | ||
1669 | if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0) | |
1670 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1671 | ||
1672 | addr = ppc4xx_pciex_get_config_base(port, bus, devfn); | |
1673 | ||
1674 | /* | |
1675 | * Reading from configuration space of non-existing device can | |
1676 | * generate transaction errors. For the read duration we suppress | |
1677 | * assertion of machine check exceptions to avoid those. | |
1678 | */ | |
1679 | gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG); | |
1680 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA); | |
1681 | ||
1682 | pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x" | |
1683 | " offset=0x%04x len=%d, addr=0x%p val=0x%08x\n", | |
1684 | bus->number, hose->first_busno, hose->last_busno, | |
1685 | devfn, offset, len, addr + offset, val); | |
1686 | ||
1687 | switch (len) { | |
1688 | case 1: | |
1689 | out_8((u8 *)(addr + offset), val); | |
1690 | break; | |
1691 | case 2: | |
1692 | out_le16((u16 *)(addr + offset), val); | |
1693 | break; | |
1694 | default: | |
1695 | out_le32((u32 *)(addr + offset), val); | |
1696 | break; | |
1697 | } | |
1698 | ||
1699 | dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg); | |
1700 | ||
1701 | return PCIBIOS_SUCCESSFUL; | |
1702 | } | |
1703 | ||
1704 | static struct pci_ops ppc4xx_pciex_pci_ops = | |
1705 | { | |
1706 | .read = ppc4xx_pciex_read_config, | |
1707 | .write = ppc4xx_pciex_write_config, | |
1708 | }; | |
1709 | ||
84d727a1 BH |
1710 | static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port *port, |
1711 | struct pci_controller *hose, | |
1712 | void __iomem *mbase, | |
1713 | u64 plb_addr, | |
1714 | u64 pci_addr, | |
1715 | u64 size, | |
1716 | unsigned int flags, | |
1717 | int index) | |
1718 | { | |
1719 | u32 lah, lal, pciah, pcial, sa; | |
1720 | ||
1721 | if (!is_power_of_2(size) || | |
1722 | (index < 2 && size < 0x100000) || | |
1723 | (index == 2 && size < 0x100) || | |
1724 | (plb_addr & (size - 1)) != 0) { | |
b7c670d6 | 1725 | printk(KERN_WARNING "%pOF: Resource out of range\n", hose->dn); |
84d727a1 BH |
1726 | return -1; |
1727 | } | |
1728 | ||
1729 | /* Calculate register values */ | |
1730 | lah = RES_TO_U32_HIGH(plb_addr); | |
1731 | lal = RES_TO_U32_LOW(plb_addr); | |
1732 | pciah = RES_TO_U32_HIGH(pci_addr); | |
1733 | pcial = RES_TO_U32_LOW(pci_addr); | |
1734 | sa = (0xffffffffu << ilog2(size)) | 0x1; | |
1735 | ||
1736 | /* Program register values */ | |
1737 | switch (index) { | |
1738 | case 0: | |
1739 | out_le32(mbase + PECFG_POM0LAH, pciah); | |
1740 | out_le32(mbase + PECFG_POM0LAL, pcial); | |
1741 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah); | |
1742 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal); | |
1743 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff); | |
e7fa1d13 AEK |
1744 | /*Enabled and single region */ |
1745 | if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) | |
1746 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, | |
1747 | sa | DCRO_PEGPL_460SX_OMR1MSKL_UOT | |
1748 | | DCRO_PEGPL_OMRxMSKL_VAL); | |
2a2c74b2 AP |
1749 | else if (of_device_is_compatible( |
1750 | port->node, "ibm,plb-pciex-476fpe") || | |
1751 | of_device_is_compatible( | |
1752 | port->node, "ibm,plb-pciex-476gtr")) | |
df777bd3 TB |
1753 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, |
1754 | sa | DCRO_PEGPL_476FPE_OMR1MSKL_UOT | |
1755 | | DCRO_PEGPL_OMRxMSKL_VAL); | |
e7fa1d13 AEK |
1756 | else |
1757 | dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, | |
1758 | sa | DCRO_PEGPL_OMR1MSKL_UOT | |
1759 | | DCRO_PEGPL_OMRxMSKL_VAL); | |
84d727a1 BH |
1760 | break; |
1761 | case 1: | |
1762 | out_le32(mbase + PECFG_POM1LAH, pciah); | |
1763 | out_le32(mbase + PECFG_POM1LAL, pcial); | |
1764 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah); | |
1765 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal); | |
1766 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff); | |
e7fa1d13 AEK |
1767 | dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, |
1768 | sa | DCRO_PEGPL_OMRxMSKL_VAL); | |
84d727a1 BH |
1769 | break; |
1770 | case 2: | |
1771 | out_le32(mbase + PECFG_POM2LAH, pciah); | |
1772 | out_le32(mbase + PECFG_POM2LAL, pcial); | |
1773 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah); | |
1774 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal); | |
1775 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff); | |
1776 | /* Note that 3 here means enabled | IO space !!! */ | |
e7fa1d13 AEK |
1777 | dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, |
1778 | sa | DCRO_PEGPL_OMR3MSKL_IO | |
1779 | | DCRO_PEGPL_OMRxMSKL_VAL); | |
84d727a1 BH |
1780 | break; |
1781 | } | |
1782 | ||
1783 | return 0; | |
1784 | } | |
1785 | ||
a2d2e1ec BH |
1786 | static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port, |
1787 | struct pci_controller *hose, | |
1788 | void __iomem *mbase) | |
1789 | { | |
84d727a1 | 1790 | int i, j, found_isa_hole = 0; |
a2d2e1ec BH |
1791 | |
1792 | /* Setup outbound memory windows */ | |
1793 | for (i = j = 0; i < 3; i++) { | |
1794 | struct resource *res = &hose->mem_resources[i]; | |
3fd47f06 | 1795 | resource_size_t offset = hose->mem_offset[i]; |
a2d2e1ec BH |
1796 | |
1797 | /* we only care about memory windows */ | |
1798 | if (!(res->flags & IORESOURCE_MEM)) | |
1799 | continue; | |
1800 | if (j > 1) { | |
b7c670d6 RH |
1801 | printk(KERN_WARNING "%pOF: Too many ranges\n", |
1802 | port->node); | |
a2d2e1ec BH |
1803 | break; |
1804 | } | |
1805 | ||
84d727a1 BH |
1806 | /* Configure the resource */ |
1807 | if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, | |
1808 | res->start, | |
3fd47f06 | 1809 | res->start - offset, |
28f65c11 | 1810 | resource_size(res), |
84d727a1 BH |
1811 | res->flags, |
1812 | j) == 0) { | |
1813 | j++; | |
1814 | ||
1815 | /* If the resource PCI address is 0 then we have our | |
1816 | * ISA memory hole | |
1817 | */ | |
3fd47f06 | 1818 | if (res->start == offset) |
84d727a1 | 1819 | found_isa_hole = 1; |
a2d2e1ec | 1820 | } |
a2d2e1ec BH |
1821 | } |
1822 | ||
84d727a1 BH |
1823 | /* Handle ISA memory hole if not already covered */ |
1824 | if (j <= 1 && !found_isa_hole && hose->isa_mem_size) | |
1825 | if (ppc4xx_setup_one_pciex_POM(port, hose, mbase, | |
1826 | hose->isa_mem_phys, 0, | |
1827 | hose->isa_mem_size, 0, j) == 0) | |
b7c670d6 RH |
1828 | printk(KERN_INFO "%pOF: Legacy ISA memory support enabled\n", |
1829 | hose->dn); | |
84d727a1 BH |
1830 | |
1831 | /* Configure IO, always 64K starting at 0. We hard wire it to 64K ! | |
1832 | * Note also that it -has- to be region index 2 on this HW | |
1833 | */ | |
1834 | if (hose->io_resource.flags & IORESOURCE_IO) | |
1835 | ppc4xx_setup_one_pciex_POM(port, hose, mbase, | |
1836 | hose->io_base_phys, 0, | |
1837 | 0x10000, IORESOURCE_IO, 2); | |
a2d2e1ec BH |
1838 | } |
1839 | ||
1840 | static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port, | |
1841 | struct pci_controller *hose, | |
1842 | void __iomem *mbase, | |
1843 | struct resource *res) | |
1844 | { | |
28f65c11 | 1845 | resource_size_t size = resource_size(res); |
a2d2e1ec BH |
1846 | u64 sa; |
1847 | ||
80daac3f SR |
1848 | if (port->endpoint) { |
1849 | resource_size_t ep_addr = 0; | |
1850 | resource_size_t ep_size = 32 << 20; | |
1851 | ||
1852 | /* Currently we map a fixed 64MByte window to PLB address | |
1853 | * 0 (SDRAM). This should probably be configurable via a dts | |
1854 | * property. | |
1855 | */ | |
1856 | ||
1857 | /* Calculate window size */ | |
d258e64e | 1858 | sa = (0xffffffffffffffffull << ilog2(ep_size)); |
80daac3f SR |
1859 | |
1860 | /* Setup BAR0 */ | |
1861 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); | |
1862 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) | | |
1863 | PCI_BASE_ADDRESS_MEM_TYPE_64); | |
a2d2e1ec | 1864 | |
80daac3f SR |
1865 | /* Disable BAR1 & BAR2 */ |
1866 | out_le32(mbase + PECFG_BAR1MPA, 0); | |
1867 | out_le32(mbase + PECFG_BAR2HMPA, 0); | |
1868 | out_le32(mbase + PECFG_BAR2LMPA, 0); | |
a2d2e1ec | 1869 | |
80daac3f SR |
1870 | out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa)); |
1871 | out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa)); | |
1872 | ||
1873 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr)); | |
1874 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr)); | |
1875 | } else { | |
1876 | /* Calculate window size */ | |
d258e64e | 1877 | sa = (0xffffffffffffffffull << ilog2(size)); |
80daac3f | 1878 | if (res->flags & IORESOURCE_PREFETCH) |
9fb55296 | 1879 | sa |= PCI_BASE_ADDRESS_MEM_PREFETCH; |
80daac3f | 1880 | |
df777bd3 | 1881 | if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx") || |
2a2c74b2 AP |
1882 | of_device_is_compatible( |
1883 | port->node, "ibm,plb-pciex-476fpe") || | |
1884 | of_device_is_compatible( | |
1885 | port->node, "ibm,plb-pciex-476gtr")) | |
e7fa1d13 AEK |
1886 | sa |= PCI_BASE_ADDRESS_MEM_TYPE_64; |
1887 | ||
80daac3f SR |
1888 | out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa)); |
1889 | out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa)); | |
1890 | ||
1891 | /* The setup of the split looks weird to me ... let's see | |
1892 | * if it works | |
1893 | */ | |
1894 | out_le32(mbase + PECFG_PIM0LAL, 0x00000000); | |
1895 | out_le32(mbase + PECFG_PIM0LAH, 0x00000000); | |
1896 | out_le32(mbase + PECFG_PIM1LAL, 0x00000000); | |
1897 | out_le32(mbase + PECFG_PIM1LAH, 0x00000000); | |
1898 | out_le32(mbase + PECFG_PIM01SAH, 0xffff0000); | |
1899 | out_le32(mbase + PECFG_PIM01SAL, 0x00000000); | |
1900 | ||
1901 | out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start)); | |
1902 | out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start)); | |
1903 | } | |
a2d2e1ec BH |
1904 | |
1905 | /* Enable inbound mapping */ | |
1906 | out_le32(mbase + PECFG_PIMEN, 0x1); | |
1907 | ||
a2d2e1ec BH |
1908 | /* Enable I/O, Mem, and Busmaster cycles */ |
1909 | out_le16(mbase + PCI_COMMAND, | |
1910 | in_le16(mbase + PCI_COMMAND) | | |
1911 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); | |
1912 | } | |
1913 | ||
1914 | static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port) | |
1915 | { | |
1916 | struct resource dma_window; | |
1917 | struct pci_controller *hose = NULL; | |
1918 | const int *bus_range; | |
1919 | int primary = 0, busses; | |
1920 | void __iomem *mbase = NULL, *cfg_data = NULL; | |
80daac3f SR |
1921 | const u32 *pval; |
1922 | u32 val; | |
a2d2e1ec BH |
1923 | |
1924 | /* Check if primary bridge */ | |
1925 | if (of_get_property(port->node, "primary", NULL)) | |
1926 | primary = 1; | |
1927 | ||
1928 | /* Get bus range if any */ | |
1929 | bus_range = of_get_property(port->node, "bus-range", NULL); | |
1930 | ||
1931 | /* Allocate the host controller data structure */ | |
1932 | hose = pcibios_alloc_controller(port->node); | |
1933 | if (!hose) | |
1934 | goto fail; | |
1935 | ||
1936 | /* We stick the port number in "indirect_type" so the config space | |
1937 | * ops can retrieve the port data structure easily | |
1938 | */ | |
1939 | hose->indirect_type = port->index; | |
1940 | ||
1941 | /* Get bus range */ | |
1942 | hose->first_busno = bus_range ? bus_range[0] : 0x0; | |
1943 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
1944 | ||
1945 | /* Because of how big mapping the config space is (1M per bus), we | |
1946 | * limit how many busses we support. In the long run, we could replace | |
1947 | * that with something akin to kmap_atomic instead. We set aside 1 bus | |
1948 | * for the host itself too. | |
1949 | */ | |
1950 | busses = hose->last_busno - hose->first_busno; /* This is off by 1 */ | |
1951 | if (busses > MAX_PCIE_BUS_MAPPED) { | |
1952 | busses = MAX_PCIE_BUS_MAPPED; | |
1953 | hose->last_busno = hose->first_busno + busses; | |
1954 | } | |
1955 | ||
80daac3f SR |
1956 | if (!port->endpoint) { |
1957 | /* Only map the external config space in cfg_data for | |
1958 | * PCIe root-complexes. External space is 1M per bus | |
1959 | */ | |
1960 | cfg_data = ioremap(port->cfg_space.start + | |
1961 | (hose->first_busno + 1) * 0x100000, | |
1962 | busses * 0x100000); | |
1963 | if (cfg_data == NULL) { | |
b7c670d6 RH |
1964 | printk(KERN_ERR "%pOF: Can't map external config space !", |
1965 | port->node); | |
80daac3f SR |
1966 | goto fail; |
1967 | } | |
1968 | hose->cfg_data = cfg_data; | |
1969 | } | |
1970 | ||
1971 | /* Always map the host config space in cfg_addr. | |
1972 | * Internal space is 4K | |
a2d2e1ec | 1973 | */ |
a2d2e1ec | 1974 | mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000); |
80daac3f | 1975 | if (mbase == NULL) { |
b7c670d6 RH |
1976 | printk(KERN_ERR "%pOF: Can't map internal config space !", |
1977 | port->node); | |
a2d2e1ec BH |
1978 | goto fail; |
1979 | } | |
a2d2e1ec BH |
1980 | hose->cfg_addr = mbase; |
1981 | ||
b7c670d6 | 1982 | pr_debug("PCIE %pOF, bus %d..%d\n", port->node, |
a2d2e1ec BH |
1983 | hose->first_busno, hose->last_busno); |
1984 | pr_debug(" config space mapped at: root @0x%p, other @0x%p\n", | |
1985 | hose->cfg_addr, hose->cfg_data); | |
1986 | ||
1987 | /* Setup config space */ | |
1988 | hose->ops = &ppc4xx_pciex_pci_ops; | |
1989 | port->hose = hose; | |
1990 | mbase = (void __iomem *)hose->cfg_addr; | |
1991 | ||
80daac3f SR |
1992 | if (!port->endpoint) { |
1993 | /* | |
1994 | * Set bus numbers on our root port | |
1995 | */ | |
1996 | out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno); | |
1997 | out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1); | |
1998 | out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno); | |
1999 | } | |
a2d2e1ec BH |
2000 | |
2001 | /* | |
2002 | * OMRs are already reset, also disable PIMs | |
2003 | */ | |
2004 | out_le32(mbase + PECFG_PIMEN, 0); | |
2005 | ||
2006 | /* Parse outbound mapping resources */ | |
2007 | pci_process_bridge_OF_ranges(hose, port->node, primary); | |
2008 | ||
2009 | /* Parse inbound mapping resources */ | |
2010 | if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0) | |
2011 | goto fail; | |
2012 | ||
2013 | /* Configure outbound ranges POMs */ | |
2014 | ppc4xx_configure_pciex_POMs(port, hose, mbase); | |
2015 | ||
2016 | /* Configure inbound ranges PIMs */ | |
2017 | ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window); | |
2018 | ||
2019 | /* The root complex doesn't show up if we don't set some vendor | |
80daac3f SR |
2020 | * and device IDs into it. The defaults below are the same bogus |
2021 | * one that the initial code in arch/ppc had. This can be | |
2022 | * overwritten by setting the "vendor-id/device-id" properties | |
2023 | * in the pciex node. | |
a2d2e1ec | 2024 | */ |
a2d2e1ec | 2025 | |
80daac3f SR |
2026 | /* Get the (optional) vendor-/device-id from the device-tree */ |
2027 | pval = of_get_property(port->node, "vendor-id", NULL); | |
2028 | if (pval) { | |
2029 | val = *pval; | |
2030 | } else { | |
2031 | if (!port->endpoint) | |
2032 | val = 0xaaa0 + port->index; | |
2033 | else | |
2034 | val = 0xeee0 + port->index; | |
2035 | } | |
2036 | out_le16(mbase + 0x200, val); | |
2037 | ||
2038 | pval = of_get_property(port->node, "device-id", NULL); | |
2039 | if (pval) { | |
2040 | val = *pval; | |
2041 | } else { | |
2042 | if (!port->endpoint) | |
2043 | val = 0xbed0 + port->index; | |
2044 | else | |
2045 | val = 0xfed0 + port->index; | |
2046 | } | |
2047 | out_le16(mbase + 0x202, val); | |
2048 | ||
e7fa1d13 AEK |
2049 | /* Enable Bus master, memory, and io space */ |
2050 | if (of_device_is_compatible(port->node, "ibm,plb-pciex-460sx")) | |
2051 | out_le16(mbase + 0x204, 0x7); | |
2052 | ||
80daac3f SR |
2053 | if (!port->endpoint) { |
2054 | /* Set Class Code to PCI-PCI bridge and Revision Id to 1 */ | |
2055 | out_le32(mbase + 0x208, 0x06040001); | |
2056 | ||
2057 | printk(KERN_INFO "PCIE%d: successfully set as root-complex\n", | |
2058 | port->index); | |
2059 | } else { | |
2060 | /* Set Class Code to Processor/PPC */ | |
2061 | out_le32(mbase + 0x208, 0x0b200001); | |
2062 | ||
2063 | printk(KERN_INFO "PCIE%d: successfully set as endpoint\n", | |
2064 | port->index); | |
2065 | } | |
a2d2e1ec | 2066 | |
a2d2e1ec BH |
2067 | return; |
2068 | fail: | |
2069 | if (hose) | |
2070 | pcibios_free_controller(hose); | |
2071 | if (cfg_data) | |
2072 | iounmap(cfg_data); | |
2073 | if (mbase) | |
2074 | iounmap(mbase); | |
2075 | } | |
2076 | ||
5738ec6d BH |
2077 | static void __init ppc4xx_probe_pciex_bridge(struct device_node *np) |
2078 | { | |
a2d2e1ec BH |
2079 | struct ppc4xx_pciex_port *port; |
2080 | const u32 *pval; | |
2081 | int portno; | |
2082 | unsigned int dcrs; | |
2083 | ||
2084 | /* First, proceed to core initialization as we assume there's | |
2085 | * only one PCIe core in the system | |
2086 | */ | |
2087 | if (ppc4xx_pciex_check_core_init(np)) | |
2088 | return; | |
2089 | ||
2090 | /* Get the port number from the device-tree */ | |
2091 | pval = of_get_property(np, "port", NULL); | |
2092 | if (pval == NULL) { | |
b7c670d6 | 2093 | printk(KERN_ERR "PCIE: Can't find port number for %pOF\n", np); |
a2d2e1ec BH |
2094 | return; |
2095 | } | |
2096 | portno = *pval; | |
2097 | if (portno >= ppc4xx_pciex_port_count) { | |
b7c670d6 RH |
2098 | printk(KERN_ERR "PCIE: port number out of range for %pOF\n", |
2099 | np); | |
a2d2e1ec BH |
2100 | return; |
2101 | } | |
2102 | port = &ppc4xx_pciex_ports[portno]; | |
2103 | port->index = portno; | |
995ada8d SR |
2104 | |
2105 | /* | |
2106 | * Check if device is enabled | |
2107 | */ | |
2108 | if (!of_device_is_available(np)) { | |
2109 | printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index); | |
2110 | return; | |
2111 | } | |
2112 | ||
a2d2e1ec | 2113 | port->node = of_node_get(np); |
8115846e TB |
2114 | if (ppc4xx_pciex_hwops->want_sdr) { |
2115 | pval = of_get_property(np, "sdr-base", NULL); | |
2116 | if (pval == NULL) { | |
b7c670d6 RH |
2117 | printk(KERN_ERR "PCIE: missing sdr-base for %pOF\n", |
2118 | np); | |
8115846e TB |
2119 | return; |
2120 | } | |
2121 | port->sdr_base = *pval; | |
a2d2e1ec | 2122 | } |
a2d2e1ec | 2123 | |
80daac3f SR |
2124 | /* Check if device_type property is set to "pci" or "pci-endpoint". |
2125 | * Resulting from this setup this PCIe port will be configured | |
2126 | * as root-complex or as endpoint. | |
2127 | */ | |
e5480bdc | 2128 | if (of_node_is_type(port->node, "pci-endpoint")) { |
80daac3f | 2129 | port->endpoint = 1; |
e5480bdc | 2130 | } else if (of_node_is_type(port->node, "pci")) { |
80daac3f SR |
2131 | port->endpoint = 0; |
2132 | } else { | |
b7c670d6 RH |
2133 | printk(KERN_ERR "PCIE: missing or incorrect device_type for %pOF\n", |
2134 | np); | |
80daac3f SR |
2135 | return; |
2136 | } | |
035ee428 | 2137 | |
a2d2e1ec BH |
2138 | /* Fetch config space registers address */ |
2139 | if (of_address_to_resource(np, 0, &port->cfg_space)) { | |
b7c670d6 | 2140 | printk(KERN_ERR "%pOF: Can't get PCI-E config space !", np); |
a2d2e1ec BH |
2141 | return; |
2142 | } | |
2143 | /* Fetch host bridge internal registers address */ | |
2144 | if (of_address_to_resource(np, 1, &port->utl_regs)) { | |
b7c670d6 | 2145 | printk(KERN_ERR "%pOF: Can't get UTL register base !", np); |
a2d2e1ec BH |
2146 | return; |
2147 | } | |
2148 | ||
2149 | /* Map DCRs */ | |
2150 | dcrs = dcr_resource_start(np, 0); | |
2151 | if (dcrs == 0) { | |
b7c670d6 | 2152 | printk(KERN_ERR "%pOF: Can't get DCR register base !", np); |
a2d2e1ec BH |
2153 | return; |
2154 | } | |
2155 | port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0)); | |
2156 | ||
2157 | /* Initialize the port specific registers */ | |
035ee428 BH |
2158 | if (ppc4xx_pciex_port_init(port)) { |
2159 | printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index); | |
a2d2e1ec | 2160 | return; |
035ee428 | 2161 | } |
a2d2e1ec BH |
2162 | |
2163 | /* Setup the linux hose data structure */ | |
2164 | ppc4xx_pciex_port_setup_hose(port); | |
5738ec6d BH |
2165 | } |
2166 | ||
a2d2e1ec BH |
2167 | #endif /* CONFIG_PPC4xx_PCI_EXPRESS */ |
2168 | ||
5738ec6d BH |
2169 | static int __init ppc4xx_pci_find_bridges(void) |
2170 | { | |
2171 | struct device_node *np; | |
2172 | ||
0e47ff1c | 2173 | pci_add_flags(PCI_ENABLE_PROC_DOMAINS | PCI_COMPAT_DOMAIN_0); |
41b6a085 | 2174 | |
a2d2e1ec | 2175 | #ifdef CONFIG_PPC4xx_PCI_EXPRESS |
5738ec6d BH |
2176 | for_each_compatible_node(np, NULL, "ibm,plb-pciex") |
2177 | ppc4xx_probe_pciex_bridge(np); | |
a2d2e1ec | 2178 | #endif |
5738ec6d BH |
2179 | for_each_compatible_node(np, NULL, "ibm,plb-pcix") |
2180 | ppc4xx_probe_pcix_bridge(np); | |
2181 | for_each_compatible_node(np, NULL, "ibm,plb-pci") | |
2182 | ppc4xx_probe_pci_bridge(np); | |
2183 | ||
2184 | return 0; | |
2185 | } | |
2186 | arch_initcall(ppc4xx_pci_find_bridges); | |
2187 |