Commit | Line | Data |
---|---|---|
b809b3e8 | 1 | /* |
5b70a097 | 2 | * MPC83xx/85xx/86xx PCI/PCIE support routing. |
b809b3e8 | 3 | * |
07e4f801 | 4 | * Copyright 2007-2012 Freescale Semiconductor, Inc. |
598804cd | 5 | * Copyright 2008-2009 MontaVista Software, Inc. |
b809b3e8 | 6 | * |
9ac4dd30 ZR |
7 | * Initial author: Xianghua Xiao <x.xiao@freescale.com> |
8 | * Recode: ZHANG WEI <wei.zhang@freescale.com> | |
9 | * Rewrite the routing for Frescale PCI and PCI Express | |
10 | * Roy Zang <tie-fei.zang@freescale.com> | |
598804cd AV |
11 | * MPC83xx PCI-Express support: |
12 | * Tony Li <tony.li@freescale.com> | |
13 | * Anton Vorontsov <avorontsov@ru.mvista.com> | |
b809b3e8 JL |
14 | * |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | */ | |
9ac4dd30 | 20 | #include <linux/kernel.h> |
b809b3e8 | 21 | #include <linux/pci.h> |
9ac4dd30 ZR |
22 | #include <linux/delay.h> |
23 | #include <linux/string.h> | |
24 | #include <linux/init.h> | |
48b16180 | 25 | #include <linux/interrupt.h> |
95f72d1e | 26 | #include <linux/memblock.h> |
54c18193 | 27 | #include <linux/log2.h> |
5a0e3ad6 | 28 | #include <linux/slab.h> |
48b16180 WD |
29 | #include <linux/suspend.h> |
30 | #include <linux/syscore_ops.h> | |
4e0e3435 | 31 | #include <linux/uaccess.h> |
b809b3e8 | 32 | |
b809b3e8 JL |
33 | #include <asm/io.h> |
34 | #include <asm/prom.h> | |
b809b3e8 | 35 | #include <asm/pci-bridge.h> |
4e0e3435 | 36 | #include <asm/ppc-pci.h> |
9ac4dd30 | 37 | #include <asm/machdep.h> |
4e0e3435 HJ |
38 | #include <asm/disassemble.h> |
39 | #include <asm/ppc-opcode.h> | |
b809b3e8 | 40 | #include <sysdev/fsl_soc.h> |
55c44991 | 41 | #include <sysdev/fsl_pci.h> |
b809b3e8 | 42 | |
b8f44ec2 | 43 | static int fsl_pcie_bus_fixup, is_mpc83xx_pci; |
598804cd | 44 | |
bbd234b1 | 45 | static void quirk_fsl_pcie_early(struct pci_dev *dev) |
598804cd | 46 | { |
59c58c32 | 47 | u8 hdr_type; |
470788d4 | 48 | |
598804cd | 49 | /* if we aren't a PCIe don't bother */ |
f0308261 | 50 | if (!pci_is_pcie(dev)) |
598804cd AV |
51 | return; |
52 | ||
470788d4 | 53 | /* if we aren't in host mode don't bother */ |
59c58c32 ML |
54 | pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type); |
55 | if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE) | |
470788d4 KG |
56 | return; |
57 | ||
598804cd AV |
58 | dev->class = PCI_CLASS_BRIDGE_PCI << 8; |
59 | fsl_pcie_bus_fixup = 1; | |
60 | return; | |
61 | } | |
62 | ||
50d8f87d RI |
63 | static int fsl_indirect_read_config(struct pci_bus *, unsigned int, |
64 | int, int, u32 *); | |
65 | ||
66 | static int fsl_pcie_check_link(struct pci_controller *hose) | |
598804cd | 67 | { |
50d8f87d | 68 | u32 val = 0; |
598804cd | 69 | |
34642bbb | 70 | if (hose->indirect_type & PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK) { |
6d5f6a0e KP |
71 | if (hose->ops->read == fsl_indirect_read_config) |
72 | __indirect_read_config(hose, hose->first_busno, 0, | |
73 | PCIE_LTSSM, 4, &val); | |
74 | else | |
50d8f87d | 75 | early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val); |
34642bbb KG |
76 | if (val < PCIE_LTSSM_L0) |
77 | return 1; | |
78 | } else { | |
79 | struct ccsr_pci __iomem *pci = hose->private_data; | |
80 | /* for PCIe IP rev 3.0 or greater use CSR0 for link state */ | |
81 | val = (in_be32(&pci->pex_csr0) & PEX_CSR0_LTSSM_MASK) | |
82 | >> PEX_CSR0_LTSSM_SHIFT; | |
83 | if (val != PEX_CSR0_LTSSM_L0) | |
84 | return 1; | |
cc6ea0dd | 85 | } |
cc6ea0dd | 86 | |
598804cd AV |
87 | return 0; |
88 | } | |
89 | ||
50d8f87d RI |
90 | static int fsl_indirect_read_config(struct pci_bus *bus, unsigned int devfn, |
91 | int offset, int len, u32 *val) | |
92 | { | |
93 | struct pci_controller *hose = pci_bus_to_host(bus); | |
94 | ||
95 | if (fsl_pcie_check_link(hose)) | |
96 | hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; | |
97 | else | |
98 | hose->indirect_type &= ~PPC_INDIRECT_TYPE_NO_PCIE_LINK; | |
99 | ||
100 | return indirect_read_config(bus, devfn, offset, len, val); | |
101 | } | |
102 | ||
b37e1613 RI |
103 | #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) |
104 | ||
105 | static struct pci_ops fsl_indirect_pcie_ops = | |
50d8f87d RI |
106 | { |
107 | .read = fsl_indirect_read_config, | |
108 | .write = indirect_write_config, | |
109 | }; | |
110 | ||
96ea3b4a KG |
111 | #define MAX_PHYS_ADDR_BITS 40 |
112 | static u64 pci64_dma_offset = 1ull << MAX_PHYS_ADDR_BITS; | |
113 | ||
114 | static int fsl_pci_dma_set_mask(struct device *dev, u64 dma_mask) | |
115 | { | |
116 | if (!dev->dma_mask || !dma_supported(dev, dma_mask)) | |
117 | return -EIO; | |
118 | ||
119 | /* | |
120 | * Fixup PCI devices that are able to DMA to above the physical | |
121 | * address width of the SoC such that we can address any internal | |
122 | * SoC address from across PCI if needed | |
123 | */ | |
d317ac17 | 124 | if ((dev_is_pci(dev)) && |
96ea3b4a KG |
125 | dma_mask >= DMA_BIT_MASK(MAX_PHYS_ADDR_BITS)) { |
126 | set_dma_ops(dev, &dma_direct_ops); | |
127 | set_dma_offset(dev, pci64_dma_offset); | |
128 | } | |
129 | ||
130 | *dev->dma_mask = dma_mask; | |
131 | return 0; | |
132 | } | |
133 | ||
a393d897 | 134 | static int setup_one_atmu(struct ccsr_pci __iomem *pci, |
a097a78c TP |
135 | unsigned int index, const struct resource *res, |
136 | resource_size_t offset) | |
137 | { | |
138 | resource_size_t pci_addr = res->start - offset; | |
139 | resource_size_t phys_addr = res->start; | |
28f65c11 | 140 | resource_size_t size = resource_size(res); |
a097a78c TP |
141 | u32 flags = 0x80044000; /* enable & mem R/W */ |
142 | unsigned int i; | |
143 | ||
144 | pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n", | |
145 | (u64)res->start, (u64)size); | |
146 | ||
565f3764 TP |
147 | if (res->flags & IORESOURCE_PREFETCH) |
148 | flags |= 0x10000000; /* enable relaxed ordering */ | |
149 | ||
a097a78c | 150 | for (i = 0; size > 0; i++) { |
6e4c632c | 151 | unsigned int bits = min_t(u32, ilog2(size), |
a097a78c TP |
152 | __ffs(pci_addr | phys_addr)); |
153 | ||
154 | if (index + i >= 5) | |
155 | return -1; | |
156 | ||
157 | out_be32(&pci->pow[index + i].potar, pci_addr >> 12); | |
158 | out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44); | |
159 | out_be32(&pci->pow[index + i].powbar, phys_addr >> 12); | |
160 | out_be32(&pci->pow[index + i].powar, flags | (bits - 1)); | |
161 | ||
162 | pci_addr += (resource_size_t)1U << bits; | |
163 | phys_addr += (resource_size_t)1U << bits; | |
164 | size -= (resource_size_t)1U << bits; | |
165 | } | |
166 | ||
167 | return i; | |
168 | } | |
169 | ||
9ac4dd30 | 170 | /* atmu setup for fsl pci/pcie controller */ |
34642bbb | 171 | static void setup_pci_atmu(struct pci_controller *hose) |
b809b3e8 | 172 | { |
34642bbb | 173 | struct ccsr_pci __iomem *pci = hose->private_data; |
f4154e16 | 174 | int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4; |
54c18193 | 175 | u64 mem, sz, paddr_hi = 0; |
3fd47f06 | 176 | u64 offset = 0, paddr_lo = ULLONG_MAX; |
54c18193 KG |
177 | u32 pcicsrbar = 0, pcicsrbar_sz; |
178 | u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL | | |
179 | PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP; | |
c22618a1 | 180 | const char *name = hose->dn->full_name; |
446bc1ff TT |
181 | const u64 *reg; |
182 | int len; | |
b809b3e8 | 183 | |
9e67886b RZ |
184 | if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { |
185 | if (in_be32(&pci->block_rev1) >= PCIE_IP_REV_2_2) { | |
186 | win_idx = 2; | |
187 | start_idx = 0; | |
188 | end_idx = 3; | |
189 | } | |
190 | } | |
191 | ||
a097a78c | 192 | /* Disable all windows (except powar0 since it's ignored) */ |
9ac4dd30 ZR |
193 | for(i = 1; i < 5; i++) |
194 | out_be32(&pci->pow[i].powar, 0); | |
f4154e16 | 195 | for (i = start_idx; i < end_idx; i++) |
9ac4dd30 ZR |
196 | out_be32(&pci->piw[i].piwar, 0); |
197 | ||
198 | /* Setup outbound MEM window */ | |
a097a78c TP |
199 | for(i = 0, j = 1; i < 3; i++) { |
200 | if (!(hose->mem_resources[i].flags & IORESOURCE_MEM)) | |
201 | continue; | |
202 | ||
54c18193 KG |
203 | paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start); |
204 | paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end); | |
205 | ||
3fd47f06 BH |
206 | /* We assume all memory resources have the same offset */ |
207 | offset = hose->mem_offset[i]; | |
208 | n = setup_one_atmu(pci, j, &hose->mem_resources[i], offset); | |
a097a78c TP |
209 | |
210 | if (n < 0 || j >= 5) { | |
211 | pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i); | |
212 | hose->mem_resources[i].flags |= IORESOURCE_DISABLED; | |
213 | } else | |
214 | j += n; | |
215 | } | |
9ac4dd30 ZR |
216 | |
217 | /* Setup outbound IO window */ | |
a097a78c TP |
218 | if (hose->io_resource.flags & IORESOURCE_IO) { |
219 | if (j >= 5) { | |
220 | pr_err("Ran out of outbound PCI ATMUs for IO resource\n"); | |
221 | } else { | |
222 | pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, " | |
223 | "phy base 0x%016llx.\n", | |
28f65c11 JP |
224 | (u64)hose->io_resource.start, |
225 | (u64)resource_size(&hose->io_resource), | |
226 | (u64)hose->io_base_phys); | |
a097a78c TP |
227 | out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12)); |
228 | out_be32(&pci->pow[j].potear, 0); | |
229 | out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12)); | |
230 | /* Enable, IO R/W */ | |
231 | out_be32(&pci->pow[j].powar, 0x80088000 | |
2b4a8bd2 | 232 | | (ilog2(hose->io_resource.end |
a097a78c TP |
233 | - hose->io_resource.start + 1) - 1)); |
234 | } | |
9ac4dd30 ZR |
235 | } |
236 | ||
54c18193 | 237 | /* convert to pci address space */ |
3fd47f06 BH |
238 | paddr_hi -= offset; |
239 | paddr_lo -= offset; | |
54c18193 KG |
240 | |
241 | if (paddr_hi == paddr_lo) { | |
242 | pr_err("%s: No outbound window space\n", name); | |
04aa99cd | 243 | return; |
54c18193 KG |
244 | } |
245 | ||
246 | if (paddr_lo == 0) { | |
247 | pr_err("%s: No space for inbound window\n", name); | |
04aa99cd | 248 | return; |
54c18193 KG |
249 | } |
250 | ||
251 | /* setup PCSRBAR/PEXCSRBAR */ | |
252 | early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff); | |
253 | early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz); | |
254 | pcicsrbar_sz = ~pcicsrbar_sz + 1; | |
255 | ||
256 | if (paddr_hi < (0x100000000ull - pcicsrbar_sz) || | |
257 | (paddr_lo > 0x100000000ull)) | |
258 | pcicsrbar = 0x100000000ull - pcicsrbar_sz; | |
259 | else | |
260 | pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz; | |
261 | early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar); | |
262 | ||
263 | paddr_lo = min(paddr_lo, (u64)pcicsrbar); | |
264 | ||
265 | pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar); | |
266 | ||
267 | /* Setup inbound mem window */ | |
95f72d1e | 268 | mem = memblock_end_of_DRAM(); |
446bc1ff TT |
269 | |
270 | /* | |
271 | * The msi-address-64 property, if it exists, indicates the physical | |
272 | * address of the MSIIR register. Normally, this register is located | |
273 | * inside CCSR, so the ATMU that covers all of CCSR is used. But if | |
274 | * this property exists, then we normally need to create a new ATMU | |
275 | * for it. For now, however, we cheat. The only entity that creates | |
276 | * this property is the Freescale hypervisor, and the address is | |
277 | * specified in the partition configuration. Typically, the address | |
278 | * is located in the page immediately after the end of DDR. If so, we | |
279 | * can avoid allocating a new ATMU by extending the DDR ATMU by one | |
280 | * page. | |
281 | */ | |
282 | reg = of_get_property(hose->dn, "msi-address-64", &len); | |
283 | if (reg && (len == sizeof(u64))) { | |
284 | u64 address = be64_to_cpup(reg); | |
285 | ||
286 | if ((address >= mem) && (address < (mem + PAGE_SIZE))) { | |
287 | pr_info("%s: extending DDR ATMU to cover MSIIR", name); | |
288 | mem += PAGE_SIZE; | |
289 | } else { | |
290 | /* TODO: Create a new ATMU for MSIIR */ | |
291 | pr_warn("%s: msi-address-64 address of %llx is " | |
292 | "unsupported\n", name, address); | |
293 | } | |
294 | } | |
295 | ||
54c18193 | 296 | sz = min(mem, paddr_lo); |
2b4a8bd2 | 297 | mem_log = ilog2(sz); |
54c18193 KG |
298 | |
299 | /* PCIe can overmap inbound & outbound since RX & TX are separated */ | |
300 | if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { | |
301 | /* Size window to exact size if power-of-two or one size up */ | |
302 | if ((1ull << mem_log) != mem) { | |
2d49c42a | 303 | mem_log++; |
54c18193 KG |
304 | if ((1ull << mem_log) > mem) |
305 | pr_info("%s: Setting PCI inbound window " | |
306 | "greater than memory size\n", name); | |
54c18193 KG |
307 | } |
308 | ||
f4154e16 | 309 | piwar |= ((mem_log - 1) & PIWAR_SZ_MASK); |
54c18193 KG |
310 | |
311 | /* Setup inbound memory window */ | |
312 | out_be32(&pci->piw[win_idx].pitar, 0x00000000); | |
313 | out_be32(&pci->piw[win_idx].piwbar, 0x00000000); | |
314 | out_be32(&pci->piw[win_idx].piwar, piwar); | |
315 | win_idx--; | |
316 | ||
317 | hose->dma_window_base_cur = 0x00000000; | |
318 | hose->dma_window_size = (resource_size_t)sz; | |
96ea3b4a KG |
319 | |
320 | /* | |
321 | * if we have >4G of memory setup second PCI inbound window to | |
322 | * let devices that are 64-bit address capable to work w/o | |
323 | * SWIOTLB and access the full range of memory | |
324 | */ | |
325 | if (sz != mem) { | |
2b4a8bd2 | 326 | mem_log = ilog2(mem); |
96ea3b4a KG |
327 | |
328 | /* Size window up if we dont fit in exact power-of-2 */ | |
329 | if ((1ull << mem_log) != mem) | |
330 | mem_log++; | |
331 | ||
332 | piwar = (piwar & ~PIWAR_SZ_MASK) | (mem_log - 1); | |
333 | ||
334 | /* Setup inbound memory window */ | |
335 | out_be32(&pci->piw[win_idx].pitar, 0x00000000); | |
336 | out_be32(&pci->piw[win_idx].piwbear, | |
337 | pci64_dma_offset >> 44); | |
338 | out_be32(&pci->piw[win_idx].piwbar, | |
339 | pci64_dma_offset >> 12); | |
340 | out_be32(&pci->piw[win_idx].piwar, piwar); | |
341 | ||
342 | /* | |
343 | * install our own dma_set_mask handler to fixup dma_ops | |
344 | * and dma_offset | |
345 | */ | |
346 | ppc_md.dma_set_mask = fsl_pci_dma_set_mask; | |
347 | ||
348 | pr_info("%s: Setup 64-bit PCI DMA window\n", name); | |
349 | } | |
54c18193 KG |
350 | } else { |
351 | u64 paddr = 0; | |
352 | ||
353 | /* Setup inbound memory window */ | |
354 | out_be32(&pci->piw[win_idx].pitar, paddr >> 12); | |
355 | out_be32(&pci->piw[win_idx].piwbar, paddr >> 12); | |
356 | out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1))); | |
357 | win_idx--; | |
358 | ||
359 | paddr += 1ull << mem_log; | |
360 | sz -= 1ull << mem_log; | |
361 | ||
362 | if (sz) { | |
2b4a8bd2 | 363 | mem_log = ilog2(sz); |
54c18193 KG |
364 | piwar |= (mem_log - 1); |
365 | ||
366 | out_be32(&pci->piw[win_idx].pitar, paddr >> 12); | |
367 | out_be32(&pci->piw[win_idx].piwbar, paddr >> 12); | |
368 | out_be32(&pci->piw[win_idx].piwar, piwar); | |
369 | win_idx--; | |
370 | ||
371 | paddr += 1ull << mem_log; | |
372 | } | |
373 | ||
374 | hose->dma_window_base_cur = 0x00000000; | |
375 | hose->dma_window_size = (resource_size_t)paddr; | |
376 | } | |
a097a78c | 377 | |
54c18193 | 378 | if (hose->dma_window_size < mem) { |
c45e9183 KH |
379 | #ifdef CONFIG_SWIOTLB |
380 | ppc_swiotlb_enable = 1; | |
381 | #else | |
54c18193 KG |
382 | pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to " |
383 | "map - enable CONFIG_SWIOTLB to avoid dma errors.\n", | |
384 | name); | |
385 | #endif | |
386 | /* adjusting outbound windows could reclaim space in mem map */ | |
387 | if (paddr_hi < 0xffffffffull) | |
388 | pr_warning("%s: WARNING: Outbound window cfg leaves " | |
389 | "gaps in memory map. Adjusting the memory map " | |
390 | "could reduce unnecessary bounce buffering.\n", | |
391 | name); | |
392 | ||
393 | pr_info("%s: DMA window size is 0x%llx\n", name, | |
394 | (u64)hose->dma_window_size); | |
395 | } | |
b809b3e8 JL |
396 | } |
397 | ||
c9dadffb | 398 | static void __init setup_pci_cmd(struct pci_controller *hose) |
b809b3e8 | 399 | { |
b809b3e8 | 400 | u16 cmd; |
eb12af43 KG |
401 | int cap_x; |
402 | ||
b809b3e8 JL |
403 | early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd); |
404 | cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | |
9ac4dd30 | 405 | | PCI_COMMAND_IO; |
b809b3e8 | 406 | early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd); |
eb12af43 KG |
407 | |
408 | cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX); | |
409 | if (cap_x) { | |
410 | int pci_x_cmd = cap_x + PCI_X_CMD; | |
411 | cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ | |
412 | | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E; | |
413 | early_write_config_word(hose, 0, 0, pci_x_cmd, cmd); | |
414 | } else { | |
415 | early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80); | |
416 | } | |
9ad494f6 KG |
417 | } |
418 | ||
6c0a11c1 KG |
419 | void fsl_pcibios_fixup_bus(struct pci_bus *bus) |
420 | { | |
8206a110 | 421 | struct pci_controller *hose = pci_bus_to_host(bus); |
13635dfd BH |
422 | int i, is_pcie = 0, no_link; |
423 | ||
424 | /* The root complex bridge comes up with bogus resources, | |
425 | * we copy the PHB ones in. | |
426 | * | |
427 | * With the current generic PCI code, the PHB bus no longer | |
428 | * has bus->resource[0..4] set, so things are a bit more | |
429 | * tricky. | |
430 | */ | |
431 | ||
432 | if (fsl_pcie_bus_fixup) | |
433 | is_pcie = early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP); | |
434 | no_link = !!(hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK); | |
435 | ||
436 | if (bus->parent == hose->bus && (is_pcie || no_link)) { | |
437 | for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; ++i) { | |
72b122cc | 438 | struct resource *res = bus->resource[i]; |
13635dfd BH |
439 | struct resource *par; |
440 | ||
441 | if (!res) | |
442 | continue; | |
443 | if (i == 0) | |
444 | par = &hose->io_resource; | |
445 | else if (i < 4) | |
446 | par = &hose->mem_resources[i-1]; | |
447 | else par = NULL; | |
448 | ||
449 | res->start = par ? par->start : 0; | |
450 | res->end = par ? par->end : 0; | |
451 | res->flags = par ? par->flags : 0; | |
6c0a11c1 KG |
452 | } |
453 | } | |
454 | } | |
455 | ||
1e83bf87 | 456 | int fsl_add_bridge(struct platform_device *pdev, int is_primary) |
b809b3e8 JL |
457 | { |
458 | int len; | |
459 | struct pci_controller *hose; | |
460 | struct resource rsrc; | |
8efca493 | 461 | const int *bus_range; |
59c58c32 | 462 | u8 hdr_type, progif; |
52c5affc | 463 | struct device_node *dev; |
34642bbb | 464 | struct ccsr_pci __iomem *pci; |
52c5affc VS |
465 | |
466 | dev = pdev->dev.of_node; | |
b809b3e8 | 467 | |
ef1fd2df PK |
468 | if (!of_device_is_available(dev)) { |
469 | pr_warning("%s: disabled\n", dev->full_name); | |
470 | return -ENODEV; | |
471 | } | |
472 | ||
9ac4dd30 | 473 | pr_debug("Adding PCI host bridge %s\n", dev->full_name); |
b809b3e8 JL |
474 | |
475 | /* Fetch host bridge registers address */ | |
9ac4dd30 ZR |
476 | if (of_address_to_resource(dev, 0, &rsrc)) { |
477 | printk(KERN_WARNING "Can't get pci register base!"); | |
478 | return -ENOMEM; | |
479 | } | |
b809b3e8 JL |
480 | |
481 | /* Get bus range if any */ | |
e2eb6392 | 482 | bus_range = of_get_property(dev, "bus-range", &len); |
b809b3e8 JL |
483 | if (bus_range == NULL || len < 2 * sizeof(int)) |
484 | printk(KERN_WARNING "Can't get bus-range for %s, assume" | |
9ac4dd30 | 485 | " bus 0\n", dev->full_name); |
b809b3e8 | 486 | |
0e47ff1c | 487 | pci_add_flags(PCI_REASSIGN_ALL_BUS); |
dbf8471f | 488 | hose = pcibios_alloc_controller(dev); |
b809b3e8 JL |
489 | if (!hose) |
490 | return -ENOMEM; | |
dbf8471f | 491 | |
52c5affc VS |
492 | /* set platform device as the parent */ |
493 | hose->parent = &pdev->dev; | |
b809b3e8 | 494 | hose->first_busno = bus_range ? bus_range[0] : 0x0; |
bf7c036f | 495 | hose->last_busno = bus_range ? bus_range[1] : 0xff; |
b809b3e8 | 496 | |
34642bbb KG |
497 | pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n", |
498 | (u64)rsrc.start, (u64)resource_size(&rsrc)); | |
499 | ||
500 | pci = hose->private_data = ioremap(rsrc.start, resource_size(&rsrc)); | |
501 | if (!hose->private_data) | |
502 | goto no_bridge; | |
503 | ||
b37e1613 RI |
504 | setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4, |
505 | PPC_INDIRECT_TYPE_BIG_ENDIAN); | |
08871c09 | 506 | |
34642bbb KG |
507 | if (in_be32(&pci->block_rev1) < PCIE_IP_REV_3_0) |
508 | hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK; | |
509 | ||
59c58c32 | 510 | if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { |
b37e1613 RI |
511 | /* use fsl_indirect_read_config for PCIe */ |
512 | hose->ops = &fsl_indirect_pcie_ops; | |
59c58c32 ML |
513 | /* For PCIE read HEADER_TYPE to identify controler mode */ |
514 | early_read_config_byte(hose, 0, 0, PCI_HEADER_TYPE, &hdr_type); | |
515 | if ((hdr_type & 0x7f) != PCI_HEADER_TYPE_BRIDGE) | |
516 | goto no_bridge; | |
517 | ||
518 | } else { | |
519 | /* For PCI read PROG to identify controller mode */ | |
520 | early_read_config_byte(hose, 0, 0, PCI_CLASS_PROG, &progif); | |
00406e87 AS |
521 | if ((progif & 1) && |
522 | !of_property_read_bool(dev, "fsl,pci-agent-force-enum")) | |
59c58c32 | 523 | goto no_bridge; |
08871c09 PK |
524 | } |
525 | ||
9ac4dd30 | 526 | setup_pci_cmd(hose); |
b809b3e8 | 527 | |
9ac4dd30 | 528 | /* check PCI express link status */ |
957ecffc | 529 | if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) { |
7659c038 | 530 | hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG | |
957ecffc | 531 | PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS; |
34642bbb | 532 | if (fsl_pcie_check_link(hose)) |
957ecffc KG |
533 | hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; |
534 | } | |
b809b3e8 | 535 | |
df3c9019 | 536 | printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. " |
9ac4dd30 ZR |
537 | "Firmware bus number: %d->%d\n", |
538 | (unsigned long long)rsrc.start, hose->first_busno, | |
539 | hose->last_busno); | |
b809b3e8 | 540 | |
9ac4dd30 | 541 | pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", |
b809b3e8 JL |
542 | hose, hose->cfg_addr, hose->cfg_data); |
543 | ||
544 | /* Interpret the "ranges" property */ | |
545 | /* This also maps the I/O region and sets isa_io/mem_base */ | |
9ac4dd30 | 546 | pci_process_bridge_OF_ranges(hose, dev, is_primary); |
b809b3e8 JL |
547 | |
548 | /* Setup PEX window registers */ | |
34642bbb | 549 | setup_pci_atmu(hose); |
b809b3e8 JL |
550 | |
551 | return 0; | |
59c58c32 ML |
552 | |
553 | no_bridge: | |
34642bbb | 554 | iounmap(hose->private_data); |
59c58c32 ML |
555 | /* unmap cfg_data & cfg_addr separately if not on same page */ |
556 | if (((unsigned long)hose->cfg_data & PAGE_MASK) != | |
557 | ((unsigned long)hose->cfg_addr & PAGE_MASK)) | |
558 | iounmap(hose->cfg_data); | |
559 | iounmap(hose->cfg_addr); | |
560 | pcibios_free_controller(hose); | |
561 | return -ENODEV; | |
b809b3e8 | 562 | } |
5753c082 | 563 | #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */ |
76fe1ffc | 564 | |
bbd234b1 CL |
565 | DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, |
566 | quirk_fsl_pcie_early); | |
598804cd | 567 | |
470788d4 | 568 | #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x) |
598804cd AV |
569 | struct mpc83xx_pcie_priv { |
570 | void __iomem *cfg_type0; | |
571 | void __iomem *cfg_type1; | |
572 | u32 dev_base; | |
573 | }; | |
574 | ||
b8f44ec2 KG |
575 | struct pex_inbound_window { |
576 | u32 ar; | |
577 | u32 tar; | |
578 | u32 barl; | |
579 | u32 barh; | |
580 | }; | |
581 | ||
598804cd AV |
582 | /* |
583 | * With the convention of u-boot, the PCIE outbound window 0 serves | |
584 | * as configuration transactions outbound. | |
585 | */ | |
586 | #define PEX_OUTWIN0_BAR 0xCA4 | |
587 | #define PEX_OUTWIN0_TAL 0xCA8 | |
588 | #define PEX_OUTWIN0_TAH 0xCAC | |
b8f44ec2 KG |
589 | #define PEX_RC_INWIN_BASE 0xE60 |
590 | #define PEX_RCIWARn_EN 0x1 | |
598804cd AV |
591 | |
592 | static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn) | |
593 | { | |
8206a110 | 594 | struct pci_controller *hose = pci_bus_to_host(bus); |
598804cd AV |
595 | |
596 | if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK) | |
597 | return PCIBIOS_DEVICE_NOT_FOUND; | |
598 | /* | |
599 | * Workaround for the HW bug: for Type 0 configure transactions the | |
600 | * PCI-E controller does not check the device number bits and just | |
601 | * assumes that the device number bits are 0. | |
602 | */ | |
603 | if (bus->number == hose->first_busno || | |
604 | bus->primary == hose->first_busno) { | |
605 | if (devfn & 0xf8) | |
606 | return PCIBIOS_DEVICE_NOT_FOUND; | |
607 | } | |
608 | ||
609 | if (ppc_md.pci_exclude_device) { | |
610 | if (ppc_md.pci_exclude_device(hose, bus->number, devfn)) | |
611 | return PCIBIOS_DEVICE_NOT_FOUND; | |
612 | } | |
613 | ||
614 | return PCIBIOS_SUCCESSFUL; | |
615 | } | |
616 | ||
617 | static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus, | |
618 | unsigned int devfn, int offset) | |
619 | { | |
8206a110 | 620 | struct pci_controller *hose = pci_bus_to_host(bus); |
598804cd | 621 | struct mpc83xx_pcie_priv *pcie = hose->dn->data; |
f93611fa | 622 | u32 dev_base = bus->number << 24 | devfn << 16; |
598804cd AV |
623 | int ret; |
624 | ||
625 | ret = mpc83xx_pcie_exclude_device(bus, devfn); | |
626 | if (ret) | |
627 | return NULL; | |
628 | ||
629 | offset &= 0xfff; | |
630 | ||
631 | /* Type 0 */ | |
632 | if (bus->number == hose->first_busno) | |
633 | return pcie->cfg_type0 + offset; | |
634 | ||
635 | if (pcie->dev_base == dev_base) | |
636 | goto mapped; | |
637 | ||
638 | out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base); | |
639 | ||
640 | pcie->dev_base = dev_base; | |
641 | mapped: | |
642 | return pcie->cfg_type1 + offset; | |
643 | } | |
644 | ||
598804cd AV |
645 | static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn, |
646 | int offset, int len, u32 val) | |
647 | { | |
f93611fa | 648 | struct pci_controller *hose = pci_bus_to_host(bus); |
598804cd | 649 | |
f93611fa AV |
650 | /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */ |
651 | if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno) | |
652 | val &= 0xffffff00; | |
653 | ||
933d275f | 654 | return pci_generic_config_write(bus, devfn, offset, len, val); |
598804cd AV |
655 | } |
656 | ||
657 | static struct pci_ops mpc83xx_pcie_ops = { | |
933d275f RH |
658 | .map_bus = mpc83xx_pcie_remap_cfg, |
659 | .read = pci_generic_config_read, | |
598804cd AV |
660 | .write = mpc83xx_pcie_write_config, |
661 | }; | |
662 | ||
663 | static int __init mpc83xx_pcie_setup(struct pci_controller *hose, | |
664 | struct resource *reg) | |
665 | { | |
666 | struct mpc83xx_pcie_priv *pcie; | |
667 | u32 cfg_bar; | |
668 | int ret = -ENOMEM; | |
669 | ||
670 | pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL); | |
671 | if (!pcie) | |
672 | return ret; | |
673 | ||
674 | pcie->cfg_type0 = ioremap(reg->start, resource_size(reg)); | |
675 | if (!pcie->cfg_type0) | |
676 | goto err0; | |
677 | ||
678 | cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR); | |
679 | if (!cfg_bar) { | |
680 | /* PCI-E isn't configured. */ | |
681 | ret = -ENODEV; | |
682 | goto err1; | |
683 | } | |
684 | ||
685 | pcie->cfg_type1 = ioremap(cfg_bar, 0x1000); | |
686 | if (!pcie->cfg_type1) | |
687 | goto err1; | |
688 | ||
689 | WARN_ON(hose->dn->data); | |
690 | hose->dn->data = pcie; | |
691 | hose->ops = &mpc83xx_pcie_ops; | |
34642bbb | 692 | hose->indirect_type |= PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK; |
598804cd AV |
693 | |
694 | out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0); | |
695 | out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0); | |
696 | ||
34642bbb | 697 | if (fsl_pcie_check_link(hose)) |
598804cd AV |
698 | hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK; |
699 | ||
700 | return 0; | |
701 | err1: | |
702 | iounmap(pcie->cfg_type0); | |
703 | err0: | |
704 | kfree(pcie); | |
705 | return ret; | |
706 | ||
707 | } | |
708 | ||
76fe1ffc JR |
709 | int __init mpc83xx_add_bridge(struct device_node *dev) |
710 | { | |
598804cd | 711 | int ret; |
76fe1ffc JR |
712 | int len; |
713 | struct pci_controller *hose; | |
5b70a097 JR |
714 | struct resource rsrc_reg; |
715 | struct resource rsrc_cfg; | |
76fe1ffc | 716 | const int *bus_range; |
5b70a097 | 717 | int primary; |
76fe1ffc | 718 | |
b8f44ec2 KG |
719 | is_mpc83xx_pci = 1; |
720 | ||
598804cd AV |
721 | if (!of_device_is_available(dev)) { |
722 | pr_warning("%s: disabled by the firmware.\n", | |
723 | dev->full_name); | |
724 | return -ENODEV; | |
725 | } | |
76fe1ffc JR |
726 | pr_debug("Adding PCI host bridge %s\n", dev->full_name); |
727 | ||
728 | /* Fetch host bridge registers address */ | |
5b70a097 JR |
729 | if (of_address_to_resource(dev, 0, &rsrc_reg)) { |
730 | printk(KERN_WARNING "Can't get pci register base!\n"); | |
731 | return -ENOMEM; | |
732 | } | |
733 | ||
734 | memset(&rsrc_cfg, 0, sizeof(rsrc_cfg)); | |
735 | ||
736 | if (of_address_to_resource(dev, 1, &rsrc_cfg)) { | |
737 | printk(KERN_WARNING | |
738 | "No pci config register base in dev tree, " | |
739 | "using default\n"); | |
740 | /* | |
741 | * MPC83xx supports up to two host controllers | |
742 | * one at 0x8500 has config space registers at 0x8300 | |
743 | * one at 0x8600 has config space registers at 0x8380 | |
744 | */ | |
745 | if ((rsrc_reg.start & 0xfffff) == 0x8500) | |
746 | rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300; | |
747 | else if ((rsrc_reg.start & 0xfffff) == 0x8600) | |
748 | rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380; | |
749 | } | |
750 | /* | |
751 | * Controller at offset 0x8500 is primary | |
752 | */ | |
753 | if ((rsrc_reg.start & 0xfffff) == 0x8500) | |
754 | primary = 1; | |
755 | else | |
756 | primary = 0; | |
76fe1ffc JR |
757 | |
758 | /* Get bus range if any */ | |
759 | bus_range = of_get_property(dev, "bus-range", &len); | |
760 | if (bus_range == NULL || len < 2 * sizeof(int)) { | |
761 | printk(KERN_WARNING "Can't get bus-range for %s, assume" | |
762 | " bus 0\n", dev->full_name); | |
763 | } | |
764 | ||
0e47ff1c | 765 | pci_add_flags(PCI_REASSIGN_ALL_BUS); |
76fe1ffc JR |
766 | hose = pcibios_alloc_controller(dev); |
767 | if (!hose) | |
768 | return -ENOMEM; | |
769 | ||
770 | hose->first_busno = bus_range ? bus_range[0] : 0; | |
771 | hose->last_busno = bus_range ? bus_range[1] : 0xff; | |
772 | ||
598804cd AV |
773 | if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) { |
774 | ret = mpc83xx_pcie_setup(hose, &rsrc_reg); | |
775 | if (ret) | |
776 | goto err0; | |
777 | } else { | |
b37e1613 RI |
778 | setup_indirect_pci(hose, rsrc_cfg.start, |
779 | rsrc_cfg.start + 4, 0); | |
598804cd | 780 | } |
76fe1ffc | 781 | |
35225802 | 782 | printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. " |
76fe1ffc | 783 | "Firmware bus number: %d->%d\n", |
5b70a097 | 784 | (unsigned long long)rsrc_reg.start, hose->first_busno, |
76fe1ffc JR |
785 | hose->last_busno); |
786 | ||
787 | pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n", | |
788 | hose, hose->cfg_addr, hose->cfg_data); | |
789 | ||
790 | /* Interpret the "ranges" property */ | |
791 | /* This also maps the I/O region and sets isa_io/mem_base */ | |
792 | pci_process_bridge_OF_ranges(hose, dev, primary); | |
793 | ||
794 | return 0; | |
598804cd AV |
795 | err0: |
796 | pcibios_free_controller(hose); | |
797 | return ret; | |
76fe1ffc JR |
798 | } |
799 | #endif /* CONFIG_PPC_83xx */ | |
b8f44ec2 KG |
800 | |
801 | u64 fsl_pci_immrbar_base(struct pci_controller *hose) | |
802 | { | |
803 | #ifdef CONFIG_PPC_83xx | |
804 | if (is_mpc83xx_pci) { | |
805 | struct mpc83xx_pcie_priv *pcie = hose->dn->data; | |
806 | struct pex_inbound_window *in; | |
807 | int i; | |
808 | ||
809 | /* Walk the Root Complex Inbound windows to match IMMR base */ | |
810 | in = pcie->cfg_type0 + PEX_RC_INWIN_BASE; | |
811 | for (i = 0; i < 4; i++) { | |
812 | /* not enabled, skip */ | |
3894817f HS |
813 | if (!(in_le32(&in[i].ar) & PEX_RCIWARn_EN)) |
814 | continue; | |
b8f44ec2 KG |
815 | |
816 | if (get_immrbase() == in_le32(&in[i].tar)) | |
817 | return (u64)in_le32(&in[i].barh) << 32 | | |
818 | in_le32(&in[i].barl); | |
819 | } | |
820 | ||
821 | printk(KERN_WARNING "could not find PCI BAR matching IMMR\n"); | |
822 | } | |
823 | #endif | |
824 | ||
825 | #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) | |
826 | if (!is_mpc83xx_pci) { | |
827 | u32 base; | |
828 | ||
829 | pci_bus_read_config_dword(hose->bus, | |
830 | PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base); | |
a424b97b ML |
831 | |
832 | /* | |
833 | * For PEXCSRBAR, bit 3-0 indicate prefetchable and | |
834 | * address type. So when getting base address, these | |
835 | * bits should be masked | |
836 | */ | |
837 | base &= PCI_BASE_ADDRESS_MEM_MASK; | |
838 | ||
b8f44ec2 KG |
839 | return base; |
840 | } | |
841 | #endif | |
842 | ||
843 | return 0; | |
844 | } | |
07e4f801 | 845 | |
4e0e3435 HJ |
846 | #ifdef CONFIG_E500 |
847 | static int mcheck_handle_load(struct pt_regs *regs, u32 inst) | |
848 | { | |
849 | unsigned int rd, ra, rb, d; | |
850 | ||
851 | rd = get_rt(inst); | |
852 | ra = get_ra(inst); | |
853 | rb = get_rb(inst); | |
854 | d = get_d(inst); | |
855 | ||
856 | switch (get_op(inst)) { | |
857 | case 31: | |
858 | switch (get_xop(inst)) { | |
859 | case OP_31_XOP_LWZX: | |
860 | case OP_31_XOP_LWBRX: | |
861 | regs->gpr[rd] = 0xffffffff; | |
862 | break; | |
863 | ||
864 | case OP_31_XOP_LWZUX: | |
865 | regs->gpr[rd] = 0xffffffff; | |
866 | regs->gpr[ra] += regs->gpr[rb]; | |
867 | break; | |
868 | ||
869 | case OP_31_XOP_LBZX: | |
870 | regs->gpr[rd] = 0xff; | |
871 | break; | |
872 | ||
873 | case OP_31_XOP_LBZUX: | |
874 | regs->gpr[rd] = 0xff; | |
875 | regs->gpr[ra] += regs->gpr[rb]; | |
876 | break; | |
877 | ||
878 | case OP_31_XOP_LHZX: | |
879 | case OP_31_XOP_LHBRX: | |
880 | regs->gpr[rd] = 0xffff; | |
881 | break; | |
882 | ||
883 | case OP_31_XOP_LHZUX: | |
884 | regs->gpr[rd] = 0xffff; | |
885 | regs->gpr[ra] += regs->gpr[rb]; | |
886 | break; | |
887 | ||
888 | case OP_31_XOP_LHAX: | |
889 | regs->gpr[rd] = ~0UL; | |
890 | break; | |
891 | ||
892 | case OP_31_XOP_LHAUX: | |
893 | regs->gpr[rd] = ~0UL; | |
894 | regs->gpr[ra] += regs->gpr[rb]; | |
895 | break; | |
896 | ||
897 | default: | |
898 | return 0; | |
899 | } | |
900 | break; | |
901 | ||
902 | case OP_LWZ: | |
903 | regs->gpr[rd] = 0xffffffff; | |
904 | break; | |
905 | ||
906 | case OP_LWZU: | |
907 | regs->gpr[rd] = 0xffffffff; | |
908 | regs->gpr[ra] += (s16)d; | |
909 | break; | |
910 | ||
911 | case OP_LBZ: | |
912 | regs->gpr[rd] = 0xff; | |
913 | break; | |
914 | ||
915 | case OP_LBZU: | |
916 | regs->gpr[rd] = 0xff; | |
917 | regs->gpr[ra] += (s16)d; | |
918 | break; | |
919 | ||
920 | case OP_LHZ: | |
921 | regs->gpr[rd] = 0xffff; | |
922 | break; | |
923 | ||
924 | case OP_LHZU: | |
925 | regs->gpr[rd] = 0xffff; | |
926 | regs->gpr[ra] += (s16)d; | |
927 | break; | |
928 | ||
929 | case OP_LHA: | |
930 | regs->gpr[rd] = ~0UL; | |
931 | break; | |
932 | ||
933 | case OP_LHAU: | |
934 | regs->gpr[rd] = ~0UL; | |
935 | regs->gpr[ra] += (s16)d; | |
936 | break; | |
937 | ||
938 | default: | |
939 | return 0; | |
940 | } | |
941 | ||
942 | return 1; | |
943 | } | |
944 | ||
945 | static int is_in_pci_mem_space(phys_addr_t addr) | |
946 | { | |
947 | struct pci_controller *hose; | |
948 | struct resource *res; | |
949 | int i; | |
950 | ||
951 | list_for_each_entry(hose, &hose_list, list_node) { | |
952 | if (!(hose->indirect_type & PPC_INDIRECT_TYPE_EXT_REG)) | |
953 | continue; | |
954 | ||
955 | for (i = 0; i < 3; i++) { | |
956 | res = &hose->mem_resources[i]; | |
957 | if ((res->flags & IORESOURCE_MEM) && | |
958 | addr >= res->start && addr <= res->end) | |
959 | return 1; | |
960 | } | |
961 | } | |
962 | return 0; | |
963 | } | |
964 | ||
965 | int fsl_pci_mcheck_exception(struct pt_regs *regs) | |
966 | { | |
967 | u32 inst; | |
968 | int ret; | |
969 | phys_addr_t addr = 0; | |
970 | ||
971 | /* Let KVM/QEMU deal with the exception */ | |
972 | if (regs->msr & MSR_GS) | |
973 | return 0; | |
974 | ||
975 | #ifdef CONFIG_PHYS_64BIT | |
976 | addr = mfspr(SPRN_MCARU); | |
977 | addr <<= 32; | |
978 | #endif | |
979 | addr += mfspr(SPRN_MCAR); | |
980 | ||
981 | if (is_in_pci_mem_space(addr)) { | |
982 | if (user_mode(regs)) { | |
983 | pagefault_disable(); | |
984 | ret = get_user(regs->nip, &inst); | |
985 | pagefault_enable(); | |
986 | } else { | |
987 | ret = probe_kernel_address(regs->nip, inst); | |
988 | } | |
989 | ||
990 | if (mcheck_handle_load(regs, inst)) { | |
991 | regs->nip += 4; | |
992 | return 1; | |
993 | } | |
994 | } | |
995 | ||
996 | return 0; | |
997 | } | |
998 | #endif | |
999 | ||
07e4f801 SW |
1000 | #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx) |
1001 | static const struct of_device_id pci_ids[] = { | |
1002 | { .compatible = "fsl,mpc8540-pci", }, | |
1003 | { .compatible = "fsl,mpc8548-pcie", }, | |
1004 | { .compatible = "fsl,mpc8610-pci", }, | |
1005 | { .compatible = "fsl,mpc8641-pcie", }, | |
d064f30e | 1006 | { .compatible = "fsl,qoriq-pcie", }, |
14bdc913 TT |
1007 | { .compatible = "fsl,qoriq-pcie-v2.1", }, |
1008 | { .compatible = "fsl,qoriq-pcie-v2.2", }, | |
1009 | { .compatible = "fsl,qoriq-pcie-v2.3", }, | |
1010 | { .compatible = "fsl,qoriq-pcie-v2.4", }, | |
cc6ea0dd | 1011 | { .compatible = "fsl,qoriq-pcie-v3.0", }, |
14bdc913 TT |
1012 | |
1013 | /* | |
1014 | * The following entries are for compatibility with older device | |
1015 | * trees. | |
1016 | */ | |
07e4f801 | 1017 | { .compatible = "fsl,p1022-pcie", }, |
07e4f801 | 1018 | { .compatible = "fsl,p4080-pcie", }, |
14bdc913 | 1019 | |
07e4f801 SW |
1020 | {}, |
1021 | }; | |
1022 | ||
1023 | struct device_node *fsl_pci_primary; | |
1024 | ||
905e75c4 | 1025 | void fsl_pci_assign_primary(void) |
07e4f801 | 1026 | { |
905e75c4 | 1027 | struct device_node *np; |
07e4f801 SW |
1028 | |
1029 | /* Callers can specify the primary bus using other means. */ | |
905e75c4 JH |
1030 | if (fsl_pci_primary) |
1031 | return; | |
1032 | ||
1033 | /* If a PCI host bridge contains an ISA node, it's primary. */ | |
1034 | np = of_find_node_by_type(NULL, "isa"); | |
1035 | while ((fsl_pci_primary = of_get_parent(np))) { | |
1036 | of_node_put(np); | |
1037 | np = fsl_pci_primary; | |
1038 | ||
1039 | if (of_match_node(pci_ids, np) && of_device_is_available(np)) | |
1040 | return; | |
07e4f801 SW |
1041 | } |
1042 | ||
905e75c4 JH |
1043 | /* |
1044 | * If there's no PCI host bridge with ISA, arbitrarily | |
1045 | * designate one as primary. This can go away once | |
1046 | * various bugs with primary-less systems are fixed. | |
1047 | */ | |
1048 | for_each_matching_node(np, pci_ids) { | |
1049 | if (of_device_is_available(np)) { | |
1050 | fsl_pci_primary = np; | |
1051 | of_node_put(np); | |
1052 | return; | |
07e4f801 SW |
1053 | } |
1054 | } | |
905e75c4 JH |
1055 | } |
1056 | ||
48b16180 WD |
1057 | #ifdef CONFIG_PM_SLEEP |
1058 | static irqreturn_t fsl_pci_pme_handle(int irq, void *dev_id) | |
905e75c4 | 1059 | { |
48b16180 WD |
1060 | struct pci_controller *hose = dev_id; |
1061 | struct ccsr_pci __iomem *pci = hose->private_data; | |
1062 | u32 dr; | |
905e75c4 | 1063 | |
48b16180 WD |
1064 | dr = in_be32(&pci->pex_pme_mes_dr); |
1065 | if (!dr) | |
1066 | return IRQ_NONE; | |
07e4f801 | 1067 | |
48b16180 | 1068 | out_be32(&pci->pex_pme_mes_dr, dr); |
905e75c4 | 1069 | |
48b16180 | 1070 | return IRQ_HANDLED; |
905e75c4 JH |
1071 | } |
1072 | ||
48b16180 | 1073 | static int fsl_pci_pme_probe(struct pci_controller *hose) |
a393d897 | 1074 | { |
48b16180 WD |
1075 | struct ccsr_pci __iomem *pci; |
1076 | struct pci_dev *dev; | |
1077 | int pme_irq; | |
1078 | int res; | |
1079 | u16 pms; | |
a393d897 | 1080 | |
48b16180 WD |
1081 | /* Get hose's pci_dev */ |
1082 | dev = list_first_entry(&hose->bus->devices, typeof(*dev), bus_list); | |
1083 | ||
1084 | /* PME Disable */ | |
1085 | pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms); | |
1086 | pms &= ~PCI_PM_CTRL_PME_ENABLE; | |
1087 | pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms); | |
1088 | ||
1089 | pme_irq = irq_of_parse_and_map(hose->dn, 0); | |
1090 | if (!pme_irq) { | |
1091 | dev_err(&dev->dev, "Failed to map PME interrupt.\n"); | |
1092 | ||
1093 | return -ENXIO; | |
1094 | } | |
1095 | ||
1096 | res = devm_request_irq(hose->parent, pme_irq, | |
1097 | fsl_pci_pme_handle, | |
1098 | IRQF_SHARED, | |
1099 | "[PCI] PME", hose); | |
1100 | if (res < 0) { | |
1101 | dev_err(&dev->dev, "Unable to requiest irq %d for PME\n", pme_irq); | |
1102 | irq_dispose_mapping(pme_irq); | |
a393d897 | 1103 | |
a393d897 JH |
1104 | return -ENODEV; |
1105 | } | |
1106 | ||
48b16180 WD |
1107 | pci = hose->private_data; |
1108 | ||
1109 | /* Enable PTOD, ENL23D & EXL23D */ | |
dd41d514 | 1110 | clrbits32(&pci->pex_pme_mes_disr, |
48b16180 WD |
1111 | PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D); |
1112 | ||
1113 | out_be32(&pci->pex_pme_mes_ier, 0); | |
1114 | setbits32(&pci->pex_pme_mes_ier, | |
1115 | PME_DISR_EN_PTOD | PME_DISR_EN_ENL23D | PME_DISR_EN_EXL23D); | |
1116 | ||
1117 | /* PME Enable */ | |
1118 | pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pms); | |
1119 | pms |= PCI_PM_CTRL_PME_ENABLE; | |
1120 | pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pms); | |
a393d897 JH |
1121 | |
1122 | return 0; | |
1123 | } | |
1124 | ||
48b16180 WD |
1125 | static void send_pme_turnoff_message(struct pci_controller *hose) |
1126 | { | |
1127 | struct ccsr_pci __iomem *pci = hose->private_data; | |
1128 | u32 dr; | |
1129 | int i; | |
a393d897 | 1130 | |
48b16180 WD |
1131 | /* Send PME_Turn_Off Message Request */ |
1132 | setbits32(&pci->pex_pmcr, PEX_PMCR_PTOMR); | |
a393d897 | 1133 | |
48b16180 WD |
1134 | /* Wait trun off done */ |
1135 | for (i = 0; i < 150; i++) { | |
1136 | dr = in_be32(&pci->pex_pme_mes_dr); | |
1137 | if (dr) { | |
1138 | out_be32(&pci->pex_pme_mes_dr, dr); | |
1139 | break; | |
1140 | } | |
a393d897 | 1141 | |
48b16180 WD |
1142 | udelay(1000); |
1143 | } | |
1144 | } | |
a393d897 | 1145 | |
48b16180 WD |
1146 | static void fsl_pci_syscore_do_suspend(struct pci_controller *hose) |
1147 | { | |
1148 | send_pme_turnoff_message(hose); | |
1149 | } | |
1150 | ||
1151 | static int fsl_pci_syscore_suspend(void) | |
1152 | { | |
1153 | struct pci_controller *hose, *tmp; | |
1154 | ||
1155 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) | |
1156 | fsl_pci_syscore_do_suspend(hose); | |
1157 | ||
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | static void fsl_pci_syscore_do_resume(struct pci_controller *hose) | |
1162 | { | |
1163 | struct ccsr_pci __iomem *pci = hose->private_data; | |
1164 | u32 dr; | |
1165 | int i; | |
1166 | ||
1167 | /* Send Exit L2 State Message */ | |
1168 | setbits32(&pci->pex_pmcr, PEX_PMCR_EXL2S); | |
1169 | ||
1170 | /* Wait exit done */ | |
1171 | for (i = 0; i < 150; i++) { | |
1172 | dr = in_be32(&pci->pex_pme_mes_dr); | |
1173 | if (dr) { | |
1174 | out_be32(&pci->pex_pme_mes_dr, dr); | |
1175 | break; | |
1176 | } | |
1177 | ||
1178 | udelay(1000); | |
1179 | } | |
1180 | ||
1181 | setup_pci_atmu(hose); | |
1182 | } | |
1183 | ||
1184 | static void fsl_pci_syscore_resume(void) | |
1185 | { | |
1186 | struct pci_controller *hose, *tmp; | |
1187 | ||
1188 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) | |
1189 | fsl_pci_syscore_do_resume(hose); | |
1190 | } | |
1191 | ||
1192 | static struct syscore_ops pci_syscore_pm_ops = { | |
1193 | .suspend = fsl_pci_syscore_suspend, | |
1194 | .resume = fsl_pci_syscore_resume, | |
1195 | }; | |
a393d897 JH |
1196 | #endif |
1197 | ||
48b16180 WD |
1198 | void fsl_pcibios_fixup_phb(struct pci_controller *phb) |
1199 | { | |
1200 | #ifdef CONFIG_PM_SLEEP | |
1201 | fsl_pci_pme_probe(phb); | |
1202 | #endif | |
1203 | } | |
1204 | ||
1205 | static int fsl_pci_probe(struct platform_device *pdev) | |
1206 | { | |
1207 | struct device_node *node; | |
1208 | int ret; | |
1209 | ||
1210 | node = pdev->dev.of_node; | |
1211 | ret = fsl_add_bridge(pdev, fsl_pci_primary == node); | |
1212 | ||
1213 | mpc85xx_pci_err_probe(pdev); | |
1214 | ||
1215 | return 0; | |
1216 | } | |
1217 | ||
905e75c4 JH |
1218 | static struct platform_driver fsl_pci_driver = { |
1219 | .driver = { | |
1220 | .name = "fsl-pci", | |
1221 | .of_match_table = pci_ids, | |
1222 | }, | |
1223 | .probe = fsl_pci_probe, | |
1224 | }; | |
1225 | ||
1226 | static int __init fsl_pci_init(void) | |
1227 | { | |
48b16180 WD |
1228 | #ifdef CONFIG_PM_SLEEP |
1229 | register_syscore_ops(&pci_syscore_pm_ops); | |
1230 | #endif | |
905e75c4 | 1231 | return platform_driver_register(&fsl_pci_driver); |
07e4f801 | 1232 | } |
905e75c4 | 1233 | arch_initcall(fsl_pci_init); |
07e4f801 | 1234 | #endif |