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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / sysdev / fsl_pci.c
1 /*
2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
3 *
4 * Copyright 2007-2009 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/lmb.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;
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 = 2;
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 pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
113 if (!pci) {
114 dev_err(hose->parent, "Unable to map ATMU registers\n");
115 return;
116 }
117
118 /* Disable all windows (except powar0 since it's ignored) */
119 for(i = 1; i < 5; i++)
120 out_be32(&pci->pow[i].powar, 0);
121 for(i = 0; i < 3; i++)
122 out_be32(&pci->piw[i].piwar, 0);
123
124 /* Setup outbound MEM window */
125 for(i = 0, j = 1; i < 3; i++) {
126 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
127 continue;
128
129 paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
130 paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
131
132 n = setup_one_atmu(pci, j, &hose->mem_resources[i],
133 hose->pci_mem_offset);
134
135 if (n < 0 || j >= 5) {
136 pr_err("Ran out of outbound PCI ATMUs for resource %d!\n", i);
137 hose->mem_resources[i].flags |= IORESOURCE_DISABLED;
138 } else
139 j += n;
140 }
141
142 /* Setup outbound IO window */
143 if (hose->io_resource.flags & IORESOURCE_IO) {
144 if (j >= 5) {
145 pr_err("Ran out of outbound PCI ATMUs for IO resource\n");
146 } else {
147 pr_debug("PCI IO resource start 0x%016llx, size 0x%016llx, "
148 "phy base 0x%016llx.\n",
149 (u64)hose->io_resource.start,
150 (u64)hose->io_resource.end - (u64)hose->io_resource.start + 1,
151 (u64)hose->io_base_phys);
152 out_be32(&pci->pow[j].potar, (hose->io_resource.start >> 12));
153 out_be32(&pci->pow[j].potear, 0);
154 out_be32(&pci->pow[j].powbar, (hose->io_base_phys >> 12));
155 /* Enable, IO R/W */
156 out_be32(&pci->pow[j].powar, 0x80088000
157 | (__ilog2(hose->io_resource.end
158 - hose->io_resource.start + 1) - 1));
159 }
160 }
161
162 /* convert to pci address space */
163 paddr_hi -= hose->pci_mem_offset;
164 paddr_lo -= hose->pci_mem_offset;
165
166 if (paddr_hi == paddr_lo) {
167 pr_err("%s: No outbound window space\n", name);
168 return ;
169 }
170
171 if (paddr_lo == 0) {
172 pr_err("%s: No space for inbound window\n", name);
173 return ;
174 }
175
176 /* setup PCSRBAR/PEXCSRBAR */
177 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
178 early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
179 pcicsrbar_sz = ~pcicsrbar_sz + 1;
180
181 if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
182 (paddr_lo > 0x100000000ull))
183 pcicsrbar = 0x100000000ull - pcicsrbar_sz;
184 else
185 pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
186 early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
187
188 paddr_lo = min(paddr_lo, (u64)pcicsrbar);
189
190 pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
191
192 /* Setup inbound mem window */
193 mem = lmb_end_of_DRAM();
194 sz = min(mem, paddr_lo);
195 mem_log = __ilog2_u64(sz);
196
197 /* PCIe can overmap inbound & outbound since RX & TX are separated */
198 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
199 /* Size window to exact size if power-of-two or one size up */
200 if ((1ull << mem_log) != mem) {
201 if ((1ull << mem_log) > mem)
202 pr_info("%s: Setting PCI inbound window "
203 "greater than memory size\n", name);
204 mem_log++;
205 }
206
207 piwar |= (mem_log - 1);
208
209 /* Setup inbound memory window */
210 out_be32(&pci->piw[win_idx].pitar, 0x00000000);
211 out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
212 out_be32(&pci->piw[win_idx].piwar, piwar);
213 win_idx--;
214
215 hose->dma_window_base_cur = 0x00000000;
216 hose->dma_window_size = (resource_size_t)sz;
217 } else {
218 u64 paddr = 0;
219
220 /* Setup inbound memory window */
221 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
222 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
223 out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1)));
224 win_idx--;
225
226 paddr += 1ull << mem_log;
227 sz -= 1ull << mem_log;
228
229 if (sz) {
230 mem_log = __ilog2_u64(sz);
231 piwar |= (mem_log - 1);
232
233 out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
234 out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
235 out_be32(&pci->piw[win_idx].piwar, piwar);
236 win_idx--;
237
238 paddr += 1ull << mem_log;
239 }
240
241 hose->dma_window_base_cur = 0x00000000;
242 hose->dma_window_size = (resource_size_t)paddr;
243 }
244
245 if (hose->dma_window_size < mem) {
246 #ifndef CONFIG_SWIOTLB
247 pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
248 "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
249 name);
250 #endif
251 /* adjusting outbound windows could reclaim space in mem map */
252 if (paddr_hi < 0xffffffffull)
253 pr_warning("%s: WARNING: Outbound window cfg leaves "
254 "gaps in memory map. Adjusting the memory map "
255 "could reduce unnecessary bounce buffering.\n",
256 name);
257
258 pr_info("%s: DMA window size is 0x%llx\n", name,
259 (u64)hose->dma_window_size);
260 }
261
262 iounmap(pci);
263 }
264
265 static void __init setup_pci_cmd(struct pci_controller *hose)
266 {
267 u16 cmd;
268 int cap_x;
269
270 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
271 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
272 | PCI_COMMAND_IO;
273 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
274
275 cap_x = early_find_capability(hose, 0, 0, PCI_CAP_ID_PCIX);
276 if (cap_x) {
277 int pci_x_cmd = cap_x + PCI_X_CMD;
278 cmd = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
279 | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
280 early_write_config_word(hose, 0, 0, pci_x_cmd, cmd);
281 } else {
282 early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
283 }
284 }
285
286 void fsl_pcibios_fixup_bus(struct pci_bus *bus)
287 {
288 struct pci_controller *hose = pci_bus_to_host(bus);
289 int i;
290
291 if ((bus->parent == hose->bus) &&
292 ((fsl_pcie_bus_fixup &&
293 early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) ||
294 (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)))
295 {
296 for (i = 0; i < 4; ++i) {
297 struct resource *res = bus->resource[i];
298 struct resource *par = bus->parent->resource[i];
299 if (res) {
300 res->start = 0;
301 res->end = 0;
302 res->flags = 0;
303 }
304 if (res && par) {
305 res->start = par->start;
306 res->end = par->end;
307 res->flags = par->flags;
308 }
309 }
310 }
311 }
312
313 int __init fsl_add_bridge(struct device_node *dev, int is_primary)
314 {
315 int len;
316 struct pci_controller *hose;
317 struct resource rsrc;
318 const int *bus_range;
319
320 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
321
322 /* Fetch host bridge registers address */
323 if (of_address_to_resource(dev, 0, &rsrc)) {
324 printk(KERN_WARNING "Can't get pci register base!");
325 return -ENOMEM;
326 }
327
328 /* Get bus range if any */
329 bus_range = of_get_property(dev, "bus-range", &len);
330 if (bus_range == NULL || len < 2 * sizeof(int))
331 printk(KERN_WARNING "Can't get bus-range for %s, assume"
332 " bus 0\n", dev->full_name);
333
334 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
335 hose = pcibios_alloc_controller(dev);
336 if (!hose)
337 return -ENOMEM;
338
339 hose->first_busno = bus_range ? bus_range[0] : 0x0;
340 hose->last_busno = bus_range ? bus_range[1] : 0xff;
341
342 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
343 PPC_INDIRECT_TYPE_BIG_ENDIAN);
344 setup_pci_cmd(hose);
345
346 /* check PCI express link status */
347 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
348 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
349 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
350 if (fsl_pcie_check_link(hose))
351 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
352 }
353
354 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
355 "Firmware bus number: %d->%d\n",
356 (unsigned long long)rsrc.start, hose->first_busno,
357 hose->last_busno);
358
359 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
360 hose, hose->cfg_addr, hose->cfg_data);
361
362 /* Interpret the "ranges" property */
363 /* This also maps the I/O region and sets isa_io/mem_base */
364 pci_process_bridge_OF_ranges(hose, dev, is_primary);
365
366 /* Setup PEX window registers */
367 setup_pci_atmu(hose, &rsrc);
368
369 return 0;
370 }
371
372 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_header);
373 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_header);
374 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_header);
375 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header);
376 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header);
377 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header);
378 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header);
379 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569E, quirk_fsl_pcie_header);
380 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569, quirk_fsl_pcie_header);
381 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header);
382 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header);
383 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header);
384 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_header);
385 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533E, quirk_fsl_pcie_header);
386 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533, quirk_fsl_pcie_header);
387 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_header);
388 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_header);
389 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572E, quirk_fsl_pcie_header);
390 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572, quirk_fsl_pcie_header);
391 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536E, quirk_fsl_pcie_header);
392 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header);
393 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header);
394 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header);
395 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header);
396 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011E, quirk_fsl_pcie_header);
397 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011, quirk_fsl_pcie_header);
398 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013E, quirk_fsl_pcie_header);
399 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013, quirk_fsl_pcie_header);
400 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020E, quirk_fsl_pcie_header);
401 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020, quirk_fsl_pcie_header);
402 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022E, quirk_fsl_pcie_header);
403 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022, quirk_fsl_pcie_header);
404 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010E, quirk_fsl_pcie_header);
405 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010, quirk_fsl_pcie_header);
406 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020E, quirk_fsl_pcie_header);
407 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020, quirk_fsl_pcie_header);
408 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040E, quirk_fsl_pcie_header);
409 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040, quirk_fsl_pcie_header);
410 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080E, quirk_fsl_pcie_header);
411 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080, quirk_fsl_pcie_header);
412 #endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
413
414 #if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
415 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314E, quirk_fsl_pcie_header);
416 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314, quirk_fsl_pcie_header);
417 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315E, quirk_fsl_pcie_header);
418 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315, quirk_fsl_pcie_header);
419 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377E, quirk_fsl_pcie_header);
420 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377, quirk_fsl_pcie_header);
421 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378E, quirk_fsl_pcie_header);
422 DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378, quirk_fsl_pcie_header);
423
424 struct mpc83xx_pcie_priv {
425 void __iomem *cfg_type0;
426 void __iomem *cfg_type1;
427 u32 dev_base;
428 };
429
430 /*
431 * With the convention of u-boot, the PCIE outbound window 0 serves
432 * as configuration transactions outbound.
433 */
434 #define PEX_OUTWIN0_BAR 0xCA4
435 #define PEX_OUTWIN0_TAL 0xCA8
436 #define PEX_OUTWIN0_TAH 0xCAC
437
438 static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
439 {
440 struct pci_controller *hose = pci_bus_to_host(bus);
441
442 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
443 return PCIBIOS_DEVICE_NOT_FOUND;
444 /*
445 * Workaround for the HW bug: for Type 0 configure transactions the
446 * PCI-E controller does not check the device number bits and just
447 * assumes that the device number bits are 0.
448 */
449 if (bus->number == hose->first_busno ||
450 bus->primary == hose->first_busno) {
451 if (devfn & 0xf8)
452 return PCIBIOS_DEVICE_NOT_FOUND;
453 }
454
455 if (ppc_md.pci_exclude_device) {
456 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
457 return PCIBIOS_DEVICE_NOT_FOUND;
458 }
459
460 return PCIBIOS_SUCCESSFUL;
461 }
462
463 static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
464 unsigned int devfn, int offset)
465 {
466 struct pci_controller *hose = pci_bus_to_host(bus);
467 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
468 u32 dev_base = bus->number << 24 | devfn << 16;
469 int ret;
470
471 ret = mpc83xx_pcie_exclude_device(bus, devfn);
472 if (ret)
473 return NULL;
474
475 offset &= 0xfff;
476
477 /* Type 0 */
478 if (bus->number == hose->first_busno)
479 return pcie->cfg_type0 + offset;
480
481 if (pcie->dev_base == dev_base)
482 goto mapped;
483
484 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
485
486 pcie->dev_base = dev_base;
487 mapped:
488 return pcie->cfg_type1 + offset;
489 }
490
491 static int mpc83xx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
492 int offset, int len, u32 *val)
493 {
494 void __iomem *cfg_addr;
495
496 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
497 if (!cfg_addr)
498 return PCIBIOS_DEVICE_NOT_FOUND;
499
500 switch (len) {
501 case 1:
502 *val = in_8(cfg_addr);
503 break;
504 case 2:
505 *val = in_le16(cfg_addr);
506 break;
507 default:
508 *val = in_le32(cfg_addr);
509 break;
510 }
511
512 return PCIBIOS_SUCCESSFUL;
513 }
514
515 static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
516 int offset, int len, u32 val)
517 {
518 struct pci_controller *hose = pci_bus_to_host(bus);
519 void __iomem *cfg_addr;
520
521 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
522 if (!cfg_addr)
523 return PCIBIOS_DEVICE_NOT_FOUND;
524
525 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
526 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
527 val &= 0xffffff00;
528
529 switch (len) {
530 case 1:
531 out_8(cfg_addr, val);
532 break;
533 case 2:
534 out_le16(cfg_addr, val);
535 break;
536 default:
537 out_le32(cfg_addr, val);
538 break;
539 }
540
541 return PCIBIOS_SUCCESSFUL;
542 }
543
544 static struct pci_ops mpc83xx_pcie_ops = {
545 .read = mpc83xx_pcie_read_config,
546 .write = mpc83xx_pcie_write_config,
547 };
548
549 static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
550 struct resource *reg)
551 {
552 struct mpc83xx_pcie_priv *pcie;
553 u32 cfg_bar;
554 int ret = -ENOMEM;
555
556 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
557 if (!pcie)
558 return ret;
559
560 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
561 if (!pcie->cfg_type0)
562 goto err0;
563
564 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
565 if (!cfg_bar) {
566 /* PCI-E isn't configured. */
567 ret = -ENODEV;
568 goto err1;
569 }
570
571 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
572 if (!pcie->cfg_type1)
573 goto err1;
574
575 WARN_ON(hose->dn->data);
576 hose->dn->data = pcie;
577 hose->ops = &mpc83xx_pcie_ops;
578
579 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
580 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
581
582 if (fsl_pcie_check_link(hose))
583 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
584
585 return 0;
586 err1:
587 iounmap(pcie->cfg_type0);
588 err0:
589 kfree(pcie);
590 return ret;
591
592 }
593
594 int __init mpc83xx_add_bridge(struct device_node *dev)
595 {
596 int ret;
597 int len;
598 struct pci_controller *hose;
599 struct resource rsrc_reg;
600 struct resource rsrc_cfg;
601 const int *bus_range;
602 int primary;
603
604 if (!of_device_is_available(dev)) {
605 pr_warning("%s: disabled by the firmware.\n",
606 dev->full_name);
607 return -ENODEV;
608 }
609 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
610
611 /* Fetch host bridge registers address */
612 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
613 printk(KERN_WARNING "Can't get pci register base!\n");
614 return -ENOMEM;
615 }
616
617 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
618
619 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
620 printk(KERN_WARNING
621 "No pci config register base in dev tree, "
622 "using default\n");
623 /*
624 * MPC83xx supports up to two host controllers
625 * one at 0x8500 has config space registers at 0x8300
626 * one at 0x8600 has config space registers at 0x8380
627 */
628 if ((rsrc_reg.start & 0xfffff) == 0x8500)
629 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
630 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
631 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
632 }
633 /*
634 * Controller at offset 0x8500 is primary
635 */
636 if ((rsrc_reg.start & 0xfffff) == 0x8500)
637 primary = 1;
638 else
639 primary = 0;
640
641 /* Get bus range if any */
642 bus_range = of_get_property(dev, "bus-range", &len);
643 if (bus_range == NULL || len < 2 * sizeof(int)) {
644 printk(KERN_WARNING "Can't get bus-range for %s, assume"
645 " bus 0\n", dev->full_name);
646 }
647
648 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
649 hose = pcibios_alloc_controller(dev);
650 if (!hose)
651 return -ENOMEM;
652
653 hose->first_busno = bus_range ? bus_range[0] : 0;
654 hose->last_busno = bus_range ? bus_range[1] : 0xff;
655
656 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
657 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
658 if (ret)
659 goto err0;
660 } else {
661 setup_indirect_pci(hose, rsrc_cfg.start,
662 rsrc_cfg.start + 4, 0);
663 }
664
665 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
666 "Firmware bus number: %d->%d\n",
667 (unsigned long long)rsrc_reg.start, hose->first_busno,
668 hose->last_busno);
669
670 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
671 hose, hose->cfg_addr, hose->cfg_data);
672
673 /* Interpret the "ranges" property */
674 /* This also maps the I/O region and sets isa_io/mem_base */
675 pci_process_bridge_OF_ranges(hose, dev, primary);
676
677 return 0;
678 err0:
679 pcibios_free_controller(hose);
680 return ret;
681 }
682 #endif /* CONFIG_PPC_83xx */
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