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powerpc/85xx: Don't add disabled PCIe devices
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / powerpc / sysdev / fsl_pci.c
blob68ca9290df9451886e74d24fa4834c15780979f5
1 /*
2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
3 *
4 * Copyright 2007-2011 Freescale Semiconductor, Inc.
5 * Copyright 2008-2009 MontaVista Software, Inc.
6 *
7 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
8 * Recode: ZHANG WEI <wei.zhang@freescale.com>
9 * Rewrite the routing for Frescale PCI and PCI Express
10 * Roy Zang <tie-fei.zang@freescale.com>
11 * MPC83xx PCI-Express support:
12 * Tony Li <tony.li@freescale.com>
13 * Anton Vorontsov <avorontsov@ru.mvista.com>
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 */
20 #include <linux/kernel.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/string.h>
24 #include <linux/init.h>
25 #include <linux/bootmem.h>
26 #include <linux/memblock.h>
27 #include <linux/log2.h>
28 #include <linux/slab.h>
29
30 #include <asm/io.h>
31 #include <asm/prom.h>
32 #include <asm/pci-bridge.h>
33 #include <asm/machdep.h>
34 #include <sysdev/fsl_soc.h>
35 #include <sysdev/fsl_pci.h>
36
37 static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
38
39 static void __init quirk_fsl_pcie_header(struct pci_dev *dev)
40 {
41 /* if we aren't a PCIe don't bother */
42 if (!pci_find_capability(dev, PCI_CAP_ID_EXP))
43 return;
44
45 dev->class = PCI_CLASS_BRIDGE_PCI << 8;
46 fsl_pcie_bus_fixup = 1;
47 return;
48 }
49
50 static int __init fsl_pcie_check_link(struct pci_controller *hose)
51 {
52 u32 val;
53
54 early_read_config_dword(hose, 0, 0, PCIE_LTSSM, &val);
55 if (val < PCIE_LTSSM_L0)
56 return 1;
57 return 0;
58 }
59
60 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
61 static int __init setup_one_atmu(struct ccsr_pci __iomem *pci,
62 unsigned int index, const struct resource *res,
63 resource_size_t offset)
64 {
65 resource_size_t pci_addr = res->start - offset;
66 resource_size_t phys_addr = res->start;
67 resource_size_t size = res->end - res->start + 1;
68 u32 flags = 0x80044000; /* enable & mem R/W */
69 unsigned int i;
70
71 pr_debug("PCI MEM resource start 0x%016llx, size 0x%016llx.\n",
72 (u64)res->start, (u64)size);
73
74 if (res->flags & IORESOURCE_PREFETCH)
75 flags |= 0x10000000; /* enable relaxed ordering */
76
77 for (i = 0; size > 0; i++) {
78 unsigned int bits = min(__ilog2(size),
79 __ffs(pci_addr | phys_addr));
80
81 if (index + i >= 5)
82 return -1;
83
84 out_be32(&pci->pow[index + i].potar, pci_addr >> 12);
85 out_be32(&pci->pow[index + i].potear, (u64)pci_addr >> 44);
86 out_be32(&pci->pow[index + i].powbar, phys_addr >> 12);
87 out_be32(&pci->pow[index + i].powar, flags | (bits - 1));
88
89 pci_addr += (resource_size_t)1U << bits;
90 phys_addr += (resource_size_t)1U << bits;
91 size -= (resource_size_t)1U << bits;
92 }
93
94 return i;
95 }
96
97 /* atmu setup for fsl pci/pcie controller */
98 static void __init setup_pci_atmu(struct pci_controller *hose,
99 struct resource *rsrc)
100 {
101 struct ccsr_pci __iomem *pci;
102 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
103 u64 mem, sz, paddr_hi = 0;
104 u64 paddr_lo = ULLONG_MAX;
105 u32 pcicsrbar = 0, pcicsrbar_sz;
106 u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
107 PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
108 char *name = hose->dn->full_name;
109
110 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
111 (u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1);
112
113 if (of_device_is_compatible(hose->dn, "fsl,qoriq-pcie-v2.2")) {
114 win_idx = 2;
115 start_idx = 0;
116 end_idx = 3;
117 }
118
119 pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
120 if (!pci) {
121 dev_err(hose->parent, "Unable to map ATMU registers\n");
122 return;
123 }
124
125 /* Disable all windows (except powar0 since it's ignored) */
126 for(i = 1; i < 5; i++)
127 out_be32(&pci->pow[i].powar, 0);
128 for (i = start_idx; i < end_idx; i++)
129 out_be32(&pci->piw[i].piwar, 0);
130
131 /* Setup outbound MEM window */
132 for(i = 0, j = 1; i < 3; i++) {
133 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
134 continue;
135
136 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
137 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
138
139 n = setup_one_atmu(pci, j, &hose->mem_resources[i],
140 hose->pci_mem_offset);
141
142 if (n < 0 || j >= 5) {
143 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
144 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
145 } else
146 j += n;
147 }
148
149 /* Setup outbound IO window */
150 if (hose->io_resource.flags & IORESOURCE_IO) {
151 if (j >= 5) {
152 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
153 } else {
154 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
155 "phy base 0x%016llx.\n",
156 (u64)hose->io_resource.start,
157 (u64)hose->io_resource.end - (u64)hose->io_resource.start + 1,
158 (u64)hose->io_base_phys);
159 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
160 out_be32(&pci->pow[j].potear, 0);
161 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
162 /* Enable, IO R/W */
163 out_be32(&pci->pow[j].powar, 0x80088000
164 | (__ilog2(hose->io_resource.end
165 - hose->io_resource.start + 1) - 1));
166 }
167 }
168
169 /* convert to pci address space */
170 paddr_hi -= hose->pci_mem_offset;
171 paddr_lo -= hose->pci_mem_offset;
172
173 if (paddr_hi == paddr_lo) {
174 pr_err("%s: No outbound window space\n", name);
175 return ;
176 }
177
178 if (paddr_lo == 0) {
179 pr_err("%s: No space for inbound window\n", name);
180 return ;
181 }
182
183 /* setup PCSRBAR/PEXCSRBAR */
184 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
185 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
186 pcicsrbar_sz = ~pcicsrbar_sz + 1;
187
188 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
189 (paddr_lo > 0x100000000ull))
190 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
191 else
192 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
193 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
194
195 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
196
197 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
198
199 /* Setup inbound mem window */
200 mem = memblock_end_of_DRAM();
201 sz = min(mem, paddr_lo);
202 mem_log = __ilog2_u64(sz);
203
204 /* PCIe can overmap inbound & outbound since RX & TX are separated */
205 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
206 /* Size window to exact size if power-of-two or one size up */
207 if ((1ull << mem_log) != mem) {
208 if ((1ull << mem_log) > mem)
209 pr_info("%s: Setting PCI inbound window "
210 "greater than memory size\n", name);
211 mem_log++;
212 }
213
214 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
215
216 /* Setup inbound memory window */
217 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
218 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
219 out_be32(&pci->piw[win_idx].piwar, piwar);
220 win_idx--;
221
222 hose->dma_window_base_cur = 0x00000000;
223 hose->dma_window_size = (resource_size_t)sz;
224 } else {
225 u64 paddr = 0;
226
227 /* Setup inbound memory window */
228 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
229 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
230 out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1)));
231 win_idx--;
232
233 paddr += 1ull << mem_log;
234 sz -= 1ull << mem_log;
235
236 if (sz) {
237 mem_log = __ilog2_u64(sz);
238 piwar |= (mem_log - 1);
239
240 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
241 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
242 out_be32(&pci->piw[win_idx].piwar, piwar);
243 win_idx--;
244
245 paddr += 1ull << mem_log;
246 }
247
248 hose->dma_window_base_cur = 0x00000000;
249 hose->dma_window_size = (resource_size_t)paddr;
250 }
251
252 if (hose->dma_window_size < mem) {
253 #ifndef CONFIG_SWIOTLB
254 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
255 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
256 name);
257 #endif
258 /* adjusting outbound windows could reclaim space in mem map */
259 if (paddr_hi < 0xffffffffull)
260 pr_warning("%s: WARNING: Outbound window cfg leaves "
261 "gaps in memory map. Adjusting the memory map "
262 "could reduce unnecessary bounce buffering.\n",
263 name);
264
265 pr_info("%s: DMA window size is 0x%llx\n", name,
266 (u64)hose->dma_window_size);
267 }
268
269 iounmap(pci);
270 }
271
272 static void __init setup_pci_cmd(struct pci_controller *hose)
273 {
274 u16 cmd;
275 int cap_x;
276
277 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
278 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
279 | PCI_COMMAND_IO;
280 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
281
282 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
283 if (cap_x) {
284 int pci_x_cmd = cap_x + PCI_X_CMD;
285 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
286 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
287 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
288 } else {
289 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
290 }
291 }
292
293 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
294 {
295 struct pci_controller *hose = pci_bus_to_host(bus);
296 int i;
297
298 if ((bus->parent == hose->bus) &&
299 ((fsl_pcie_bus_fixup &&
300 early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) ||
301 (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)))
302 {
303 for (i = 0; i < 4; ++i) {
304 struct resource *res = bus->resource[i];
305 struct resource *par = bus->parent->resource[i];
306 if (res) {
307 res->start = 0;
308 res->end = 0;
309 res->flags = 0;
310 }
311 if (res && par) {
312 res->start = par->start;
313 res->end = par->end;
314 res->flags = par->flags;
315 }
316 }
317 }
318 }
319
320 int __init fsl_add_bridge(struct device_node *dev, int is_primary)
321 {
322 int len;
323 struct pci_controller *hose;
324 struct resource rsrc;
325 const int *bus_range;
326
327 if (!of_device_is_available(dev)) {
328 pr_warning("%s: disabled\n", dev->full_name);
329 return -ENODEV;
330 }
331
332 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
333
334 /* Fetch host bridge registers address */
335 if (of_address_to_resource(dev, 0, &rsrc)) {
336 printk(KERN_WARNING "Can't get pci register base!");
337 return -ENOMEM;
338 }
339
340 /* Get bus range if any */
341 bus_range = of_get_property(dev, "bus-range", &len);
342 if (bus_range == NULL || len < 2 * sizeof(int))
343 printk(KERN_WARNING "Can't get bus-range for %s, assume"
344 " bus 0\n", dev->full_name);
345
346 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
347 hose = pcibios_alloc_controller(dev);
348 if (!hose)
349 return -ENOMEM;
350
351 hose->first_busno = bus_range ? bus_range[0] : 0x0;
352 hose->last_busno = bus_range ? bus_range[1] : 0xff;
353
354 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
355 PPC_INDIRECT_TYPE_BIG_ENDIAN);
356 setup_pci_cmd(hose);
357
358 /* check PCI express link status */
359 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
360 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
361 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
362 if (fsl_pcie_check_link(hose))
363 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
364 }
365
366 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
367 "Firmware bus number: %d->%d\n",
368 (unsigned long long)rsrc.start, hose->first_busno,
369 hose->last_busno);
370
371 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
372 hose, hose->cfg_addr, hose->cfg_data);
373
374 /* Interpret the "ranges" property */
375 /* This also maps the I/O region and sets isa_io/mem_base */
376 pci_process_bridge_OF_ranges(hose, dev, is_primary);
377
378 /* Setup PEX window registers */
379 setup_pci_atmu(hose, &rsrc);
380
381 return 0;
382 }
383
384 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_header);
385 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_header);
386 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_header);
387 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header);
388 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header);
389 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header);
390 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header);
391 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569E, quirk_fsl_pcie_header);
392 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569, quirk_fsl_pcie_header);
393 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header);
394 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header);
395 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header);
396 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_header);
397 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533E, quirk_fsl_pcie_header);
398 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533, quirk_fsl_pcie_header);
399 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_header);
400 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_header);
401 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572E, quirk_fsl_pcie_header);
402 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572, quirk_fsl_pcie_header);
403 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536E, quirk_fsl_pcie_header);
404 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header);
405 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header);
406 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header);
407 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header);
408 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011E, quirk_fsl_pcie_header);
409 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011, quirk_fsl_pcie_header);
410 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013E, quirk_fsl_pcie_header);
411 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013, quirk_fsl_pcie_header);
412 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020E, quirk_fsl_pcie_header);
413 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020, quirk_fsl_pcie_header);
414 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1021E, quirk_fsl_pcie_header);
415 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1021, quirk_fsl_pcie_header);
416 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022E, quirk_fsl_pcie_header);
417 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022, quirk_fsl_pcie_header);
418 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010E, quirk_fsl_pcie_header);
419 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010, quirk_fsl_pcie_header);
420 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020E, quirk_fsl_pcie_header);
421 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020, quirk_fsl_pcie_header);
422 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2040E, quirk_fsl_pcie_header);
423 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2040, quirk_fsl_pcie_header);
424 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P3041E, quirk_fsl_pcie_header);
425 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P3041, quirk_fsl_pcie_header);
426 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040E, quirk_fsl_pcie_header);
427 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040, quirk_fsl_pcie_header);
428 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080E, quirk_fsl_pcie_header);
429 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080, quirk_fsl_pcie_header);
430 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5010E, quirk_fsl_pcie_header);
431 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5010, quirk_fsl_pcie_header);
432 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5020E, quirk_fsl_pcie_header);
433 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5020, quirk_fsl_pcie_header);
434 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
435
436 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
437 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8308, quirk_fsl_pcie_header);
438 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314E, quirk_fsl_pcie_header);
439 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314, quirk_fsl_pcie_header);
440 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315E, quirk_fsl_pcie_header);
441 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315, quirk_fsl_pcie_header);
442 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377E, quirk_fsl_pcie_header);
443 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377, quirk_fsl_pcie_header);
444 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378E, quirk_fsl_pcie_header);
445 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378, quirk_fsl_pcie_header);
446
447 struct mpc83xx_pcie_priv {
448 void __iomem *cfg_type0;
449 void __iomem *cfg_type1;
450 u32 dev_base;
451 };
452
453 struct pex_inbound_window {
454 u32 ar;
455 u32 tar;
456 u32 barl;
457 u32 barh;
458 };
459
460 /*
461 * With the convention of u-boot, the PCIE outbound window 0 serves
462 * as configuration transactions outbound.
463 */
464 #define PEX_OUTWIN0_BAR 0xCA4
465 #define PEX_OUTWIN0_TAL 0xCA8
466 #define PEX_OUTWIN0_TAH 0xCAC
467 #define PEX_RC_INWIN_BASE 0xE60
468 #define PEX_RCIWARn_EN 0x1
469
470 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
471 {
472 struct pci_controller *hose = pci_bus_to_host(bus);
473
474 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
475 return PCIBIOS_DEVICE_NOT_FOUND;
476 /*
477 * Workaround for the HW bug: for Type 0 configure transactions the
478 * PCI-E controller does not check the device number bits and just
479 * assumes that the device number bits are 0.
480 */
481 if (bus->number == hose->first_busno ||
482 bus->primary == hose->first_busno) {
483 if (devfn & 0xf8)
484 return PCIBIOS_DEVICE_NOT_FOUND;
485 }
486
487 if (ppc_md.pci_exclude_device) {
488 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
489 return PCIBIOS_DEVICE_NOT_FOUND;
490 }
491
492 return PCIBIOS_SUCCESSFUL;
493 }
494
495 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
496 unsigned int devfn, int offset)
497 {
498 struct pci_controller *hose = pci_bus_to_host(bus);
499 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
500 u32 dev_base = bus->number << 24 | devfn << 16;
501 int ret;
502
503 ret = mpc83xx_pcie_exclude_device(bus, devfn);
504 if (ret)
505 return NULL;
506
507 offset &= 0xfff;
508
509 /* Type 0 */
510 if (bus->number == hose->first_busno)
511 return pcie->cfg_type0 + offset;
512
513 if (pcie->dev_base == dev_base)
514 goto mapped;
515
516 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
517
518 pcie->dev_base = dev_base;
519 mapped:
520 return pcie->cfg_type1 + offset;
521 }
522
523 static int mpc83xx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
524 int offset, int len, u32 *val)
525 {
526 void __iomem *cfg_addr;
527
528 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
529 if (!cfg_addr)
530 return PCIBIOS_DEVICE_NOT_FOUND;
531
532 switch (len) {
533 case 1:
534 *val = in_8(cfg_addr);
535 break;
536 case 2:
537 *val = in_le16(cfg_addr);
538 break;
539 default:
540 *val = in_le32(cfg_addr);
541 break;
542 }
543
544 return PCIBIOS_SUCCESSFUL;
545 }
546
547 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
548 int offset, int len, u32 val)
549 {
550 struct pci_controller *hose = pci_bus_to_host(bus);
551 void __iomem *cfg_addr;
552
553 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
554 if (!cfg_addr)
555 return PCIBIOS_DEVICE_NOT_FOUND;
556
557 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
558 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
559 val &= 0xffffff00;
560
561 switch (len) {
562 case 1:
563 out_8(cfg_addr, val);
564 break;
565 case 2:
566 out_le16(cfg_addr, val);
567 break;
568 default:
569 out_le32(cfg_addr, val);
570 break;
571 }
572
573 return PCIBIOS_SUCCESSFUL;
574 }
575
576 static struct pci_ops mpc83xx_pcie_ops = {
577 .read = mpc83xx_pcie_read_config,
578 .write = mpc83xx_pcie_write_config,
579 };
580
581 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
582 struct resource *reg)
583 {
584 struct mpc83xx_pcie_priv *pcie;
585 u32 cfg_bar;
586 int ret = -ENOMEM;
587
588 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
589 if (!pcie)
590 return ret;
591
592 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
593 if (!pcie->cfg_type0)
594 goto err0;
595
596 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
597 if (!cfg_bar) {
598 /* PCI-E isn't configured. */
599 ret = -ENODEV;
600 goto err1;
601 }
602
603 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
604 if (!pcie->cfg_type1)
605 goto err1;
606
607 WARN_ON(hose->dn->data);
608 hose->dn->data = pcie;
609 hose->ops = &mpc83xx_pcie_ops;
610
611 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
612 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
613
614 if (fsl_pcie_check_link(hose))
615 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
616
617 return 0;
618 err1:
619 iounmap(pcie->cfg_type0);
620 err0:
621 kfree(pcie);
622 return ret;
623
624 }
625
626 int __init mpc83xx_add_bridge(struct device_node *dev)
627 {
628 int ret;
629 int len;
630 struct pci_controller *hose;
631 struct resource rsrc_reg;
632 struct resource rsrc_cfg;
633 const int *bus_range;
634 int primary;
635
636 is_mpc83xx_pci = 1;
637
638 if (!of_device_is_available(dev)) {
639 pr_warning("%s: disabled by the firmware.\n",
640 dev->full_name);
641 return -ENODEV;
642 }
643 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
644
645 /* Fetch host bridge registers address */
646 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
647 printk(KERN_WARNING "Can't get pci register base!\n");
648 return -ENOMEM;
649 }
650
651 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
652
653 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
654 printk(KERN_WARNING
655 "No pci config register base in dev tree, "
656 "using default\n");
657 /*
658 * MPC83xx supports up to two host controllers
659 * one at 0x8500 has config space registers at 0x8300
660 * one at 0x8600 has config space registers at 0x8380
661 */
662 if ((rsrc_reg.start & 0xfffff) == 0x8500)
663 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
664 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
665 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
666 }
667 /*
668 * Controller at offset 0x8500 is primary
669 */
670 if ((rsrc_reg.start & 0xfffff) == 0x8500)
671 primary = 1;
672 else
673 primary = 0;
674
675 /* Get bus range if any */
676 bus_range = of_get_property(dev, "bus-range", &len);
677 if (bus_range == NULL || len < 2 * sizeof(int)) {
678 printk(KERN_WARNING "Can't get bus-range for %s, assume"
679 " bus 0\n", dev->full_name);
680 }
681
682 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
683 hose = pcibios_alloc_controller(dev);
684 if (!hose)
685 return -ENOMEM;
686
687 hose->first_busno = bus_range ? bus_range[0] : 0;
688 hose->last_busno = bus_range ? bus_range[1] : 0xff;
689
690 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
691 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
692 if (ret)
693 goto err0;
694 } else {
695 setup_indirect_pci(hose, rsrc_cfg.start,
696 rsrc_cfg.start + 4, 0);
697 }
698
699 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
700 "Firmware bus number: %d->%d\n",
701 (unsigned long long)rsrc_reg.start, hose->first_busno,
702 hose->last_busno);
703
704 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
705 hose, hose->cfg_addr, hose->cfg_data);
706
707 /* Interpret the "ranges" property */
708 /* This also maps the I/O region and sets isa_io/mem_base */
709 pci_process_bridge_OF_ranges(hose, dev, primary);
710
711 return 0;
712 err0:
713 pcibios_free_controller(hose);
714 return ret;
715 }
716 #endif /* CONFIG_PPC_83xx */
717
718 u64 fsl_pci_immrbar_base(struct pci_controller *hose)
719 {
720 #ifdef CONFIG_PPC_83xx
721 if (is_mpc83xx_pci) {
722 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
723 struct pex_inbound_window *in;
724 int i;
725
726 /* Walk the Root Complex Inbound windows to match IMMR base */
727 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
728 for (i = 0; i < 4; i++) {
729 /* not enabled, skip */
730 if (!in_le32(&in[i].ar) & PEX_RCIWARn_EN)
731 continue;
732
733 if (get_immrbase() == in_le32(&in[i].tar))
734 return (u64)in_le32(&in[i].barh) << 32 |
735 in_le32(&in[i].barl);
736 }
737
738 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
739 }
740 #endif
741
742 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
743 if (!is_mpc83xx_pci) {
744 u32 base;
745
746 pci_bus_read_config_dword(hose->bus,
747 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
748 return base;
749 }
750 #endif
751
752 return 0;
753 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree