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Merge branch 'for-2.6.39' of git://linux-nfs.org/~bfields/linux
[linux-2.6-block.git] / arch / powerpc / sysdev / fsl_pci.c
CommitLineData
b809b3e8 1/*
5b70a097 2 * MPC83xx/85xx/86xx PCI/PCIE support routing.
b809b3e8 3 *
f4154e16 4 * Copyright 2007-2011 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>
25#include <linux/bootmem.h>
95f72d1e 26#include <linux/memblock.h>
54c18193 27#include <linux/log2.h>
5a0e3ad6 28#include <linux/slab.h>
b809b3e8 29
b809b3e8
JL		 30#include <asm/io.h>
31#include <asm/prom.h>
b809b3e8 32#include <asm/pci-bridge.h>
9ac4dd30 33#include <asm/machdep.h>
b809b3e8 34#include <sysdev/fsl_soc.h>
55c44991 35#include <sysdev/fsl_pci.h>
b809b3e8 36
b8f44ec2 37static int fsl_pcie_bus_fixup, is_mpc83xx_pci;
598804cd
AV		 38
39static 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
50static 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
5753c082 60#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
a097a78c
TP		 61static 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
565f3764
TP		 74 if (res->flags & IORESOURCE_PREFETCH)
75 flags |= 0x10000000; /* enable relaxed ordering */
76
a097a78c
TP		 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
9ac4dd30 97/* atmu setup for fsl pci/pcie controller */
c9dadffb
AV		 98static void __init setup_pci_atmu(struct pci_controller *hose,
99 struct resource *rsrc)
b809b3e8 100{
9ac4dd30 101 struct ccsr_pci __iomem *pci;
f4154e16 102 int i, j, n, mem_log, win_idx = 3, start_idx = 1, end_idx = 4;
54c18193
KG		 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;
b809b3e8 109
72b122cc
KG		 110 pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
111 (u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1);
f4154e16
PK		 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
9ac4dd30 119 pci = ioremap(rsrc->start, rsrc->end - rsrc->start + 1);
a097a78c
TP		 120 if (!pci) {
121 dev_err(hose->parent, "Unable to map ATMU registers\n");
122 return;
123 }
9ac4dd30 124
a097a78c 125 /* Disable all windows (except powar0 since it's ignored) */
9ac4dd30
ZR		 126 for(i = 1; i < 5; i++)
127 out_be32(&pci->pow[i].powar, 0);
f4154e16 128 for (i = start_idx; i < end_idx; i++)
9ac4dd30
ZR		 129 out_be32(&pci->piw[i].piwar, 0);
130
131 /* Setup outbound MEM window */
a097a78c
TP		 132 for(i = 0, j = 1; i < 3; i++) {
133 if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
134 continue;
135
54c18193
KG		 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
a097a78c
TP		 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 }
9ac4dd30
ZR		 148
149 /* Setup outbound IO window */
a097a78c
TP		 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 }
9ac4dd30
ZR		 167 }
168
54c18193
KG		 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 */
95f72d1e 200 mem = memblock_end_of_DRAM();
54c18193
KG		 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
f4154e16 214 piwar |= ((mem_log - 1) & PIWAR_SZ_MASK);
54c18193
KG		 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 }
a097a78c 251
54c18193
KG		 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 }
89d93347 268
a097a78c 269 iounmap(pci);
b809b3e8
JL		 270}
271
c9dadffb 272static void __init setup_pci_cmd(struct pci_controller *hose)
b809b3e8 273{
b809b3e8 274 u16 cmd;
eb12af43
KG		 275 int cap_x;
276
b809b3e8
JL		 277 early_read_config_word(hose, 0, 0, PCI_COMMAND, &cmd);
278 cmd |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY
9ac4dd30 279 | PCI_COMMAND_IO;
b809b3e8 280 early_write_config_word(hose, 0, 0, PCI_COMMAND, cmd);
eb12af43
KG		 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 }
9ad494f6
KG		 291}
292
6c0a11c1
KG		 293void fsl_pcibios_fixup_bus(struct pci_bus *bus)
294{
8206a110 295 struct pci_controller *hose = pci_bus_to_host(bus);
6c0a11c1
KG		 296 int i;
297
72b122cc
KG		 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 }
6c0a11c1
KG		 316 }
317 }
318}
319
9ac4dd30 320int __init fsl_add_bridge(struct device_node *dev, int is_primary)
b809b3e8
JL		 321{
322 int len;
323 struct pci_controller *hose;
324 struct resource rsrc;
8efca493 325 const int *bus_range;
b809b3e8 326
9ac4dd30 327 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
b809b3e8
JL		 328
329 /* Fetch host bridge registers address */
9ac4dd30
ZR		 330 if (of_address_to_resource(dev, 0, &rsrc)) {
331 printk(KERN_WARNING "Can't get pci register base!");
332 return -ENOMEM;
333 }
b809b3e8
JL		 334
335 /* Get bus range if any */
e2eb6392 336 bus_range = of_get_property(dev, "bus-range", &len);
b809b3e8
JL		 337 if (bus_range == NULL || len < 2 * sizeof(int))
338 printk(KERN_WARNING "Can't get bus-range for %s, assume"
9ac4dd30 339 " bus 0\n", dev->full_name);
b809b3e8 340
7fe519c2 341 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
dbf8471f 342 hose = pcibios_alloc_controller(dev);
b809b3e8
JL		 343 if (!hose)
344 return -ENOMEM;
dbf8471f 345
b809b3e8 346 hose->first_busno = bus_range ? bus_range[0] : 0x0;
bf7c036f 347 hose->last_busno = bus_range ? bus_range[1] : 0xff;
b809b3e8 348
2e56ff20
KG		 349 setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
350 PPC_INDIRECT_TYPE_BIG_ENDIAN);
9ac4dd30 351 setup_pci_cmd(hose);
b809b3e8 352
9ac4dd30 353 /* check PCI express link status */
957ecffc 354 if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
7659c038 355 hose->indirect_type |= PPC_INDIRECT_TYPE_EXT_REG |
957ecffc 356 PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS;
9ac4dd30 357 if (fsl_pcie_check_link(hose))
957ecffc
KG		 358 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
359 }
b809b3e8 360
df3c9019 361 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
9ac4dd30
ZR		 362 "Firmware bus number: %d->%d\n",
363 (unsigned long long)rsrc.start, hose->first_busno,
364 hose->last_busno);
b809b3e8 365
9ac4dd30 366 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
b809b3e8
JL		 367 hose, hose->cfg_addr, hose->cfg_data);
368
369 /* Interpret the "ranges" property */
370 /* This also maps the I/O region and sets isa_io/mem_base */
9ac4dd30 371 pci_process_bridge_OF_ranges(hose, dev, is_primary);
b809b3e8
JL		 372
373 /* Setup PEX window registers */
9ac4dd30 374 setup_pci_atmu(hose, &rsrc);
b809b3e8
JL		 375
376 return 0;
377}
9ac4dd30 378
72b122cc
KG		 379DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548E, quirk_fsl_pcie_header);
380DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8548, quirk_fsl_pcie_header);
381DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543E, quirk_fsl_pcie_header);
382DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header);
383DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header);
384DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header);
385DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header);
bfa568d1
AV		 386DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569E, quirk_fsl_pcie_header);
387DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569, quirk_fsl_pcie_header);
72b122cc
KG		 388DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header);
389DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header);
390DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header);
391DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567, quirk_fsl_pcie_header);
392DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533E, quirk_fsl_pcie_header);
393DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8533, quirk_fsl_pcie_header);
394DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544E, quirk_fsl_pcie_header);
395DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8544, quirk_fsl_pcie_header);
396DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572E, quirk_fsl_pcie_header);
397DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8572, quirk_fsl_pcie_header);
2f3804ed
KG		 398DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536E, quirk_fsl_pcie_header);
399DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header);
72b122cc
KG		 400DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header);
401DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header);
402DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header);
a3f62bd2
KG		 403DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011E, quirk_fsl_pcie_header);
404DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1011, quirk_fsl_pcie_header);
405DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013E, quirk_fsl_pcie_header);
406DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1013, quirk_fsl_pcie_header);
407DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020E, quirk_fsl_pcie_header);
408DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1020, quirk_fsl_pcie_header);
a28dec2f
AV		 409DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1021E, quirk_fsl_pcie_header);
410DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1021, quirk_fsl_pcie_header);
a3f62bd2
KG		 411DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022E, quirk_fsl_pcie_header);
412DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P1022, quirk_fsl_pcie_header);
413DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010E, quirk_fsl_pcie_header);
414DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2010, quirk_fsl_pcie_header);
01af9507
KG		 415DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020E, quirk_fsl_pcie_header);
416DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020, quirk_fsl_pcie_header);
4f0e3322
KG		 417DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2040E, quirk_fsl_pcie_header);
418DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2040, quirk_fsl_pcie_header);
419DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P3041E, quirk_fsl_pcie_header);
420DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P3041, quirk_fsl_pcie_header);
a3f62bd2
KG		 421DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040E, quirk_fsl_pcie_header);
422DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4040, quirk_fsl_pcie_header);
423DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080E, quirk_fsl_pcie_header);
424DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P4080, quirk_fsl_pcie_header);
4f0e3322
KG		 425DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5010E, quirk_fsl_pcie_header);
426DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5010, quirk_fsl_pcie_header);
427DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5020E, quirk_fsl_pcie_header);
428DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P5020, quirk_fsl_pcie_header);
5753c082 429#endif /* CONFIG_FSL_SOC_BOOKE || CONFIG_PPC_86xx */
76fe1ffc 430
35225802 431#if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
e3b5e0d5 432DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8308, quirk_fsl_pcie_header);
598804cd
AV		 433DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314E, quirk_fsl_pcie_header);
434DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8314, quirk_fsl_pcie_header);
435DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315E, quirk_fsl_pcie_header);
436DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8315, quirk_fsl_pcie_header);
437DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377E, quirk_fsl_pcie_header);
438DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8377, quirk_fsl_pcie_header);
439DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378E, quirk_fsl_pcie_header);
440DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8378, quirk_fsl_pcie_header);
441
442struct mpc83xx_pcie_priv {
443 void __iomem *cfg_type0;
444 void __iomem *cfg_type1;
445 u32 dev_base;
446};
447
b8f44ec2
KG		 448struct pex_inbound_window {
449 u32 ar;
450 u32 tar;
451 u32 barl;
452 u32 barh;
453};
454
598804cd
AV		 455/*
456 * With the convention of u-boot, the PCIE outbound window 0 serves
457 * as configuration transactions outbound.
458 */
459#define PEX_OUTWIN0_BAR 0xCA4
460#define PEX_OUTWIN0_TAL 0xCA8
461#define PEX_OUTWIN0_TAH 0xCAC
b8f44ec2
KG		 462#define PEX_RC_INWIN_BASE 0xE60
463#define PEX_RCIWARn_EN 0x1
598804cd
AV		 464
465static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
466{
8206a110 467 struct pci_controller *hose = pci_bus_to_host(bus);
598804cd
AV		 468
469 if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
470 return PCIBIOS_DEVICE_NOT_FOUND;
471 /*
472 * Workaround for the HW bug: for Type 0 configure transactions the
473 * PCI-E controller does not check the device number bits and just
474 * assumes that the device number bits are 0.
475 */
476 if (bus->number == hose->first_busno ||
477 bus->primary == hose->first_busno) {
478 if (devfn & 0xf8)
479 return PCIBIOS_DEVICE_NOT_FOUND;
480 }
481
482 if (ppc_md.pci_exclude_device) {
483 if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
484 return PCIBIOS_DEVICE_NOT_FOUND;
485 }
486
487 return PCIBIOS_SUCCESSFUL;
488}
489
490static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
491 unsigned int devfn, int offset)
492{
8206a110 493 struct pci_controller *hose = pci_bus_to_host(bus);
598804cd 494 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
f93611fa 495 u32 dev_base = bus->number << 24 | devfn << 16;
598804cd
AV		 496 int ret;
497
498 ret = mpc83xx_pcie_exclude_device(bus, devfn);
499 if (ret)
500 return NULL;
501
502 offset &= 0xfff;
503
504 /* Type 0 */
505 if (bus->number == hose->first_busno)
506 return pcie->cfg_type0 + offset;
507
508 if (pcie->dev_base == dev_base)
509 goto mapped;
510
511 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, dev_base);
512
513 pcie->dev_base = dev_base;
514mapped:
515 return pcie->cfg_type1 + offset;
516}
517
518static int mpc83xx_pcie_read_config(struct pci_bus *bus, unsigned int devfn,
519 int offset, int len, u32 *val)
520{
521 void __iomem *cfg_addr;
522
523 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
524 if (!cfg_addr)
525 return PCIBIOS_DEVICE_NOT_FOUND;
526
527 switch (len) {
528 case 1:
529 *val = in_8(cfg_addr);
530 break;
531 case 2:
532 *val = in_le16(cfg_addr);
533 break;
534 default:
535 *val = in_le32(cfg_addr);
536 break;
537 }
538
539 return PCIBIOS_SUCCESSFUL;
540}
541
542static int mpc83xx_pcie_write_config(struct pci_bus *bus, unsigned int devfn,
543 int offset, int len, u32 val)
544{
f93611fa 545 struct pci_controller *hose = pci_bus_to_host(bus);
598804cd
AV		 546 void __iomem *cfg_addr;
547
548 cfg_addr = mpc83xx_pcie_remap_cfg(bus, devfn, offset);
549 if (!cfg_addr)
550 return PCIBIOS_DEVICE_NOT_FOUND;
551
f93611fa
AV		 552 /* PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS */
553 if (offset == PCI_PRIMARY_BUS && bus->number == hose->first_busno)
554 val &= 0xffffff00;
555
598804cd
AV		 556 switch (len) {
557 case 1:
558 out_8(cfg_addr, val);
559 break;
560 case 2:
561 out_le16(cfg_addr, val);
562 break;
563 default:
564 out_le32(cfg_addr, val);
565 break;
566 }
567
568 return PCIBIOS_SUCCESSFUL;
569}
570
571static struct pci_ops mpc83xx_pcie_ops = {
572 .read = mpc83xx_pcie_read_config,
573 .write = mpc83xx_pcie_write_config,
574};
575
576static int __init mpc83xx_pcie_setup(struct pci_controller *hose,
577 struct resource *reg)
578{
579 struct mpc83xx_pcie_priv *pcie;
580 u32 cfg_bar;
581 int ret = -ENOMEM;
582
583 pcie = zalloc_maybe_bootmem(sizeof(*pcie), GFP_KERNEL);
584 if (!pcie)
585 return ret;
586
587 pcie->cfg_type0 = ioremap(reg->start, resource_size(reg));
588 if (!pcie->cfg_type0)
589 goto err0;
590
591 cfg_bar = in_le32(pcie->cfg_type0 + PEX_OUTWIN0_BAR);
592 if (!cfg_bar) {
593 /* PCI-E isn't configured. */
594 ret = -ENODEV;
595 goto err1;
596 }
597
598 pcie->cfg_type1 = ioremap(cfg_bar, 0x1000);
599 if (!pcie->cfg_type1)
600 goto err1;
601
602 WARN_ON(hose->dn->data);
603 hose->dn->data = pcie;
604 hose->ops = &mpc83xx_pcie_ops;
605
606 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAH, 0);
607 out_le32(pcie->cfg_type0 + PEX_OUTWIN0_TAL, 0);
608
609 if (fsl_pcie_check_link(hose))
610 hose->indirect_type |= PPC_INDIRECT_TYPE_NO_PCIE_LINK;
611
612 return 0;
613err1:
614 iounmap(pcie->cfg_type0);
615err0:
616 kfree(pcie);
617 return ret;
618
619}
620
76fe1ffc
JR		 621int __init mpc83xx_add_bridge(struct device_node *dev)
622{
598804cd 623 int ret;
76fe1ffc
JR		 624 int len;
625 struct pci_controller *hose;
5b70a097
JR		 626 struct resource rsrc_reg;
627 struct resource rsrc_cfg;
76fe1ffc 628 const int *bus_range;
5b70a097 629 int primary;
76fe1ffc 630
b8f44ec2
KG		 631 is_mpc83xx_pci = 1;
632
598804cd
AV		 633 if (!of_device_is_available(dev)) {
634 pr_warning("%s: disabled by the firmware.\n",
635 dev->full_name);
636 return -ENODEV;
637 }
76fe1ffc
JR		 638 pr_debug("Adding PCI host bridge %s\n", dev->full_name);
639
640 /* Fetch host bridge registers address */
5b70a097
JR		 641 if (of_address_to_resource(dev, 0, &rsrc_reg)) {
642 printk(KERN_WARNING "Can't get pci register base!\n");
643 return -ENOMEM;
644 }
645
646 memset(&rsrc_cfg, 0, sizeof(rsrc_cfg));
647
648 if (of_address_to_resource(dev, 1, &rsrc_cfg)) {
649 printk(KERN_WARNING
650 "No pci config register base in dev tree, "
651 "using default\n");
652 /*
653 * MPC83xx supports up to two host controllers
654 * one at 0x8500 has config space registers at 0x8300
655 * one at 0x8600 has config space registers at 0x8380
656 */
657 if ((rsrc_reg.start & 0xfffff) == 0x8500)
658 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8300;
659 else if ((rsrc_reg.start & 0xfffff) == 0x8600)
660 rsrc_cfg.start = (rsrc_reg.start & 0xfff00000) + 0x8380;
661 }
662 /*
663 * Controller at offset 0x8500 is primary
664 */
665 if ((rsrc_reg.start & 0xfffff) == 0x8500)
666 primary = 1;
667 else
668 primary = 0;
76fe1ffc
JR		 669
670 /* Get bus range if any */
671 bus_range = of_get_property(dev, "bus-range", &len);
672 if (bus_range == NULL || len < 2 * sizeof(int)) {
673 printk(KERN_WARNING "Can't get bus-range for %s, assume"
674 " bus 0\n", dev->full_name);
675 }
676
7fe519c2 677 ppc_pci_add_flags(PPC_PCI_REASSIGN_ALL_BUS);
76fe1ffc
JR		 678 hose = pcibios_alloc_controller(dev);
679 if (!hose)
680 return -ENOMEM;
681
682 hose->first_busno = bus_range ? bus_range[0] : 0;
683 hose->last_busno = bus_range ? bus_range[1] : 0xff;
684
598804cd
AV		 685 if (of_device_is_compatible(dev, "fsl,mpc8314-pcie")) {
686 ret = mpc83xx_pcie_setup(hose, &rsrc_reg);
687 if (ret)
688 goto err0;
689 } else {
690 setup_indirect_pci(hose, rsrc_cfg.start,
691 rsrc_cfg.start + 4, 0);
692 }
76fe1ffc 693
35225802 694 printk(KERN_INFO "Found FSL PCI host bridge at 0x%016llx. "
76fe1ffc 695 "Firmware bus number: %d->%d\n",
5b70a097 696 (unsigned long long)rsrc_reg.start, hose->first_busno,
76fe1ffc
JR		 697 hose->last_busno);
698
699 pr_debug(" ->Hose at 0x%p, cfg_addr=0x%p,cfg_data=0x%p\n",
700 hose, hose->cfg_addr, hose->cfg_data);
701
702 /* Interpret the "ranges" property */
703 /* This also maps the I/O region and sets isa_io/mem_base */
704 pci_process_bridge_OF_ranges(hose, dev, primary);
705
706 return 0;
598804cd
AV		 707err0:
708 pcibios_free_controller(hose);
709 return ret;
76fe1ffc
JR		 710}
711#endif /* CONFIG_PPC_83xx */
b8f44ec2
KG		 712
713u64 fsl_pci_immrbar_base(struct pci_controller *hose)
714{
715#ifdef CONFIG_PPC_83xx
716 if (is_mpc83xx_pci) {
717 struct mpc83xx_pcie_priv *pcie = hose->dn->data;
718 struct pex_inbound_window *in;
719 int i;
720
721 /* Walk the Root Complex Inbound windows to match IMMR base */
722 in = pcie->cfg_type0 + PEX_RC_INWIN_BASE;
723 for (i = 0; i < 4; i++) {
724 /* not enabled, skip */
725 if (!in_le32(&in[i].ar) & PEX_RCIWARn_EN)
726 continue;
727
728 if (get_immrbase() == in_le32(&in[i].tar))
729 return (u64)in_le32(&in[i].barh) << 32 |
730 in_le32(&in[i].barl);
731 }
732
733 printk(KERN_WARNING "could not find PCI BAR matching IMMR\n");
734 }
735#endif
736
737#if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
738 if (!is_mpc83xx_pci) {
739 u32 base;
740
741 pci_bus_read_config_dword(hose->bus,
742 PCI_DEVFN(0, 0), PCI_BASE_ADDRESS_0, &base);
743 return base;
744 }
745#endif
746
747 return 0;
748}
Linux 6.x block layer and io_uring tree(s)