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[openwrt.git] / target / linux / brcm47xx / patches-3.2 / 0040-bcma-add-PCIe-host-controller.patch
1 From 47d0e8c2743729b4248585d33b55b6aaeac008d5 Mon Sep 17 00:00:00 2001
2 From: Hauke Mehrtens <hauke@hauke-m.de>
3 Date: Sun, 8 Jan 2012 16:53:15 +0100
4 Subject: [PATCH 25/34] bcma: add PCIe host controller
5
6 Some SoCs have a PCIe host controller to make it possible to attach
7 some other devices to it, like an other Wifi card.
8 This code was tested with an Netgear WNDR3400 (bcm4716 based), but
9 should work with all bcma based SoCs.
10
11 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
12 ---
13 arch/mips/pci/pci-bcm47xx.c | 49 +++-
14 drivers/bcma/bcma_private.h | 1 +
15 drivers/bcma/driver_pci.c | 38 +--
16 drivers/bcma/driver_pci_host.c | 576 +++++++++++++++++++++++++++++++++-
17 include/linux/bcma/bcma_driver_pci.h | 34 ++
18 include/linux/bcma/bcma_regs.h | 27 ++
19 6 files changed, 686 insertions(+), 39 deletions(-)
20
21 --- a/arch/mips/pci/pci-bcm47xx.c
22 +++ b/arch/mips/pci/pci-bcm47xx.c
23 @@ -25,6 +25,7 @@
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/ssb/ssb.h>
27 +#include <linux/bcma/bcma.h>
28 #include <bcm47xx.h>
29
30 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
31 @@ -32,15 +33,12 @@ int __init pcibios_map_irq(const struct
32 return 0;
33 }
34
35 -int pcibios_plat_dev_init(struct pci_dev *dev)
36 -{
37 #ifdef CONFIG_BCM47XX_SSB
38 +static int bcm47xx_pcibios_plat_dev_init_ssb(struct pci_dev *dev)
39 +{
40 int res;
41 u8 slot, pin;
42
43 - if (bcm47xx_bus_type != BCM47XX_BUS_TYPE_SSB)
44 - return 0;
45 -
46 res = ssb_pcibios_plat_dev_init(dev);
47 if (res < 0) {
48 printk(KERN_ALERT "PCI: Failed to init device %s\n",
49 @@ -60,6 +58,47 @@ int pcibios_plat_dev_init(struct pci_dev
50 }
51
52 dev->irq = res;
53 + return 0;
54 +}
55 #endif
56 +
57 +#ifdef CONFIG_BCM47XX_BCMA
58 +static int bcm47xx_pcibios_plat_dev_init_bcma(struct pci_dev *dev)
59 +{
60 + int res;
61 +
62 + res = bcma_core_pci_plat_dev_init(dev);
63 + if (res < 0) {
64 + printk(KERN_ALERT "PCI: Failed to init device %s\n",
65 + pci_name(dev));
66 + return res;
67 + }
68 +
69 + res = bcma_core_pci_pcibios_map_irq(dev);
70 +
71 + /* IRQ-0 and IRQ-1 are software interrupts. */
72 + if (res < 2) {
73 + printk(KERN_ALERT "PCI: Failed to map IRQ of device %s\n",
74 + pci_name(dev));
75 + return res;
76 + }
77 +
78 + dev->irq = res;
79 return 0;
80 }
81 +#endif
82 +
83 +int pcibios_plat_dev_init(struct pci_dev *dev)
84 +{
85 +#ifdef CONFIG_BCM47XX_SSB
86 + if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_SSB)
87 + return bcm47xx_pcibios_plat_dev_init_ssb(dev);
88 + else
89 +#endif
90 +#ifdef CONFIG_BCM47XX_BCMA
91 + if (bcm47xx_bus_type == BCM47XX_BUS_TYPE_BCMA)
92 + return bcm47xx_pcibios_plat_dev_init_bcma(dev);
93 + else
94 +#endif
95 + return 0;
96 +}
97 --- a/drivers/bcma/bcma_private.h
98 +++ b/drivers/bcma/bcma_private.h
99 @@ -55,6 +55,7 @@ extern void __exit bcma_host_pci_exit(vo
100 #endif /* CONFIG_BCMA_HOST_PCI */
101
102 #ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
103 +bool __devinit bcma_core_pci_is_in_hostmode(struct bcma_drv_pci *pc);
104 void __devinit bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc);
105 #endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
106
107 --- a/drivers/bcma/driver_pci.c
108 +++ b/drivers/bcma/driver_pci.c
109 @@ -2,7 +2,7 @@
110 * Broadcom specific AMBA
111 * PCI Core
112 *
113 - * Copyright 2005, Broadcom Corporation
114 + * Copyright 2005, 2011, Broadcom Corporation
115 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
116 * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
117 *
118 @@ -179,47 +179,19 @@ static void __devinit bcma_core_pci_clie
119 bcma_pcicore_serdes_workaround(pc);
120 }
121
122 -static bool __devinit bcma_core_pci_is_in_hostmode(struct bcma_drv_pci *pc)
123 -{
124 - struct bcma_bus *bus = pc->core->bus;
125 - u16 chipid_top;
126 -
127 - chipid_top = (bus->chipinfo.id & 0xFF00);
128 - if (chipid_top != 0x4700 &&
129 - chipid_top != 0x5300)
130 - return false;
131 -
132 -#ifdef CONFIG_SSB_DRIVER_PCICORE
133 - if (bus->sprom.boardflags_lo & SSB_BFL_NOPCI)
134 - return false;
135 -#endif /* CONFIG_SSB_DRIVER_PCICORE */
136 -
137 -#if 0
138 - /* TODO: on BCMA we use address from EROM instead of magic formula */
139 - u32 tmp;
140 - return !mips_busprobe32(tmp, (bus->mmio +
141 - (pc->core->core_index * BCMA_CORE_SIZE)));
142 -#endif
143 -
144 - return true;
145 -}
146 -
147 void __devinit bcma_core_pci_init(struct bcma_drv_pci *pc)
148 {
149 if (pc->setup_done)
150 return;
151
152 - if (bcma_core_pci_is_in_hostmode(pc)) {
153 #ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
154 + pc->hostmode = bcma_core_pci_is_in_hostmode(pc);
155 + if (pc->hostmode)
156 bcma_core_pci_hostmode_init(pc);
157 -#else
158 - pr_err("Driver compiled without support for hostmode PCI\n");
159 #endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
160 - } else {
161 - bcma_core_pci_clientmode_init(pc);
162 - }
163
164 - pc->setup_done = true;
165 + if (!pc->hostmode)
166 + bcma_core_pci_clientmode_init(pc);
167 }
168
169 int bcma_core_pci_irq_ctl(struct bcma_drv_pci *pc, struct bcma_device *core,
170 --- a/drivers/bcma/driver_pci_host.c
171 +++ b/drivers/bcma/driver_pci_host.c
172 @@ -2,13 +2,587 @@
173 * Broadcom specific AMBA
174 * PCI Core in hostmode
175 *
176 + * Copyright 2005 - 2011, Broadcom Corporation
177 + * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
178 + * Copyright 2011, 2012, Hauke Mehrtens <hauke@hauke-m.de>
179 + *
180 * Licensed under the GNU/GPL. See COPYING for details.
181 */
182
183 #include "bcma_private.h"
184 +#include <linux/export.h>
185 #include <linux/bcma/bcma.h>
186 +#include <asm/paccess.h>
187 +
188 +/* Probe a 32bit value on the bus and catch bus exceptions.
189 + * Returns nonzero on a bus exception.
190 + * This is MIPS specific */
191 +#define mips_busprobe32(val, addr) get_dbe((val), ((u32 *)(addr)))
192 +
193 +/* Assume one-hot slot wiring */
194 +#define BCMA_PCI_SLOT_MAX 16
195 +#define PCI_CONFIG_SPACE_SIZE 256
196 +
197 +bool __devinit bcma_core_pci_is_in_hostmode(struct bcma_drv_pci *pc)
198 +{
199 + struct bcma_bus *bus = pc->core->bus;
200 + u16 chipid_top;
201 + u32 tmp;
202 +
203 + chipid_top = (bus->chipinfo.id & 0xFF00);
204 + if (chipid_top != 0x4700 &&
205 + chipid_top != 0x5300)
206 + return false;
207 +
208 + if (bus->sprom.boardflags_lo & BCMA_CORE_PCI_BFL_NOPCI) {
209 + pr_info("This PCI core is disabled and not working\n");
210 + return false;
211 + }
212 +
213 + bcma_core_enable(pc->core, 0);
214 +
215 + return !mips_busprobe32(tmp, pc->core->io_addr);
216 +}
217 +
218 +static u32 bcma_pcie_read_config(struct bcma_drv_pci *pc, u32 address)
219 +{
220 + pcicore_write32(pc, BCMA_CORE_PCI_CONFIG_ADDR, address);
221 + pcicore_read32(pc, BCMA_CORE_PCI_CONFIG_ADDR);
222 + return pcicore_read32(pc, BCMA_CORE_PCI_CONFIG_DATA);
223 +}
224 +
225 +static void bcma_pcie_write_config(struct bcma_drv_pci *pc, u32 address,
226 + u32 data)
227 +{
228 + pcicore_write32(pc, BCMA_CORE_PCI_CONFIG_ADDR, address);
229 + pcicore_read32(pc, BCMA_CORE_PCI_CONFIG_ADDR);
230 + pcicore_write32(pc, BCMA_CORE_PCI_CONFIG_DATA, data);
231 +}
232 +
233 +static u32 bcma_get_cfgspace_addr(struct bcma_drv_pci *pc, unsigned int dev,
234 + unsigned int func, unsigned int off)
235 +{
236 + u32 addr = 0;
237 +
238 + /* Issue config commands only when the data link is up (atleast
239 + * one external pcie device is present).
240 + */
241 + if (dev >= 2 || !(bcma_pcie_read(pc, BCMA_CORE_PCI_DLLP_LSREG)
242 + & BCMA_CORE_PCI_DLLP_LSREG_LINKUP))
243 + goto out;
244 +
245 + /* Type 0 transaction */
246 + /* Slide the PCI window to the appropriate slot */
247 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI1, BCMA_CORE_PCI_SBTOPCI_CFG0);
248 + /* Calculate the address */
249 + addr = pc->host_controller->host_cfg_addr;
250 + addr |= (dev << BCMA_CORE_PCI_CFG_SLOT_SHIFT);
251 + addr |= (func << BCMA_CORE_PCI_CFG_FUN_SHIFT);
252 + addr |= (off & ~3);
253 +
254 +out:
255 + return addr;
256 +}
257 +
258 +static int bcma_extpci_read_config(struct bcma_drv_pci *pc, unsigned int dev,
259 + unsigned int func, unsigned int off,
260 + void *buf, int len)
261 +{
262 + int err = -EINVAL;
263 + u32 addr, val;
264 + void __iomem *mmio = 0;
265 +
266 + WARN_ON(!pc->hostmode);
267 + if (unlikely(len != 1 && len != 2 && len != 4))
268 + goto out;
269 + if (dev == 0) {
270 + /* we support only two functions on device 0 */
271 + if (func > 1)
272 + return -EINVAL;
273 +
274 + /* accesses to config registers with offsets >= 256
275 + * requires indirect access.
276 + */
277 + if (off >= PCI_CONFIG_SPACE_SIZE) {
278 + addr = (func << 12);
279 + addr |= (off & 0x0FFF);
280 + val = bcma_pcie_read_config(pc, addr);
281 + } else {
282 + addr = BCMA_CORE_PCI_PCICFG0;
283 + addr |= (func << 8);
284 + addr |= (off & 0xfc);
285 + val = pcicore_read32(pc, addr);
286 + }
287 + } else {
288 + addr = bcma_get_cfgspace_addr(pc, dev, func, off);
289 + if (unlikely(!addr))
290 + goto out;
291 + err = -ENOMEM;
292 + mmio = ioremap_nocache(addr, len);
293 + if (!mmio)
294 + goto out;
295 +
296 + if (mips_busprobe32(val, mmio)) {
297 + val = 0xffffffff;
298 + goto unmap;
299 + }
300 +
301 + val = readl(mmio);
302 + }
303 + val >>= (8 * (off & 3));
304 +
305 + switch (len) {
306 + case 1:
307 + *((u8 *)buf) = (u8)val;
308 + break;
309 + case 2:
310 + *((u16 *)buf) = (u16)val;
311 + break;
312 + case 4:
313 + *((u32 *)buf) = (u32)val;
314 + break;
315 + }
316 + err = 0;
317 +unmap:
318 + if (mmio)
319 + iounmap(mmio);
320 +out:
321 + return err;
322 +}
323 +
324 +static int bcma_extpci_write_config(struct bcma_drv_pci *pc, unsigned int dev,
325 + unsigned int func, unsigned int off,
326 + const void *buf, int len)
327 +{
328 + int err = -EINVAL;
329 + u32 addr = 0, val = 0;
330 + void __iomem *mmio = 0;
331 + u16 chipid = pc->core->bus->chipinfo.id;
332 +
333 + WARN_ON(!pc->hostmode);
334 + if (unlikely(len != 1 && len != 2 && len != 4))
335 + goto out;
336 + if (dev == 0) {
337 + /* accesses to config registers with offsets >= 256
338 + * requires indirect access.
339 + */
340 + if (off < PCI_CONFIG_SPACE_SIZE) {
341 + addr = pc->core->addr + BCMA_CORE_PCI_PCICFG0;
342 + addr |= (func << 8);
343 + addr |= (off & 0xfc);
344 + mmio = ioremap_nocache(addr, len);
345 + if (!mmio)
346 + goto out;
347 + }
348 + } else {
349 + addr = bcma_get_cfgspace_addr(pc, dev, func, off);
350 + if (unlikely(!addr))
351 + goto out;
352 + err = -ENOMEM;
353 + mmio = ioremap_nocache(addr, len);
354 + if (!mmio)
355 + goto out;
356 +
357 + if (mips_busprobe32(val, mmio)) {
358 + val = 0xffffffff;
359 + goto unmap;
360 + }
361 + }
362 +
363 + switch (len) {
364 + case 1:
365 + val = readl(mmio);
366 + val &= ~(0xFF << (8 * (off & 3)));
367 + val |= *((const u8 *)buf) << (8 * (off & 3));
368 + break;
369 + case 2:
370 + val = readl(mmio);
371 + val &= ~(0xFFFF << (8 * (off & 3)));
372 + val |= *((const u16 *)buf) << (8 * (off & 3));
373 + break;
374 + case 4:
375 + val = *((const u32 *)buf);
376 + break;
377 + }
378 + if (dev == 0 && !addr) {
379 + /* accesses to config registers with offsets >= 256
380 + * requires indirect access.
381 + */
382 + addr = (func << 12);
383 + addr |= (off & 0x0FFF);
384 + bcma_pcie_write_config(pc, addr, val);
385 + } else {
386 + writel(val, mmio);
387 +
388 + if (chipid == 0x4716 || chipid == 0x4748)
389 + readl(mmio);
390 + }
391 +
392 + err = 0;
393 +unmap:
394 + if (mmio)
395 + iounmap(mmio);
396 +out:
397 + return err;
398 +}
399 +
400 +static int bcma_core_pci_hostmode_read_config(struct pci_bus *bus,
401 + unsigned int devfn,
402 + int reg, int size, u32 *val)
403 +{
404 + unsigned long flags;
405 + int err;
406 + struct bcma_drv_pci *pc;
407 + struct bcma_drv_pci_host *pc_host;
408 +
409 + pc_host = container_of(bus->ops, struct bcma_drv_pci_host, pci_ops);
410 + pc = pc_host->pdev;
411 +
412 + spin_lock_irqsave(&pc_host->cfgspace_lock, flags);
413 + err = bcma_extpci_read_config(pc, PCI_SLOT(devfn),
414 + PCI_FUNC(devfn), reg, val, size);
415 + spin_unlock_irqrestore(&pc_host->cfgspace_lock, flags);
416 +
417 + return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
418 +}
419 +
420 +static int bcma_core_pci_hostmode_write_config(struct pci_bus *bus,
421 + unsigned int devfn,
422 + int reg, int size, u32 val)
423 +{
424 + unsigned long flags;
425 + int err;
426 + struct bcma_drv_pci *pc;
427 + struct bcma_drv_pci_host *pc_host;
428 +
429 + pc_host = container_of(bus->ops, struct bcma_drv_pci_host, pci_ops);
430 + pc = pc_host->pdev;
431 +
432 + spin_lock_irqsave(&pc_host->cfgspace_lock, flags);
433 + err = bcma_extpci_write_config(pc, PCI_SLOT(devfn),
434 + PCI_FUNC(devfn), reg, &val, size);
435 + spin_unlock_irqrestore(&pc_host->cfgspace_lock, flags);
436 +
437 + return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
438 +}
439 +
440 +/* return cap_offset if requested capability exists in the PCI config space */
441 +static u8 __devinit bcma_find_pci_capability(struct bcma_drv_pci *pc,
442 + unsigned int dev,
443 + unsigned int func, u8 req_cap_id,
444 + unsigned char *buf, u32 *buflen)
445 +{
446 + u8 cap_id;
447 + u8 cap_ptr = 0;
448 + u32 bufsize;
449 + u8 byte_val;
450 +
451 + /* check for Header type 0 */
452 + bcma_extpci_read_config(pc, dev, func, PCI_HEADER_TYPE, &byte_val,
453 + sizeof(u8));
454 + if ((byte_val & 0x7f) != PCI_HEADER_TYPE_NORMAL)
455 + return cap_ptr;
456 +
457 + /* check if the capability pointer field exists */
458 + bcma_extpci_read_config(pc, dev, func, PCI_STATUS, &byte_val,
459 + sizeof(u8));
460 + if (!(byte_val & PCI_STATUS_CAP_LIST))
461 + return cap_ptr;
462 +
463 + /* check if the capability pointer is 0x00 */
464 + bcma_extpci_read_config(pc, dev, func, PCI_CAPABILITY_LIST, &cap_ptr,
465 + sizeof(u8));
466 + if (cap_ptr == 0x00)
467 + return cap_ptr;
468 +
469 + /* loop thr'u the capability list and see if the requested capabilty
470 + * exists */
471 + bcma_extpci_read_config(pc, dev, func, cap_ptr, &cap_id, sizeof(u8));
472 + while (cap_id != req_cap_id) {
473 + bcma_extpci_read_config(pc, dev, func, cap_ptr + 1, &cap_ptr,
474 + sizeof(u8));
475 + if (cap_ptr == 0x00)
476 + return cap_ptr;
477 + bcma_extpci_read_config(pc, dev, func, cap_ptr, &cap_id,
478 + sizeof(u8));
479 + }
480 +
481 + /* found the caller requested capability */
482 + if ((buf != NULL) && (buflen != NULL)) {
483 + u8 cap_data;
484 +
485 + bufsize = *buflen;
486 + if (!bufsize)
487 + return cap_ptr;
488 +
489 + *buflen = 0;
490 +
491 + /* copy the cpability data excluding cap ID and next ptr */
492 + cap_data = cap_ptr + 2;
493 + if ((bufsize + cap_data) > PCI_CONFIG_SPACE_SIZE)
494 + bufsize = PCI_CONFIG_SPACE_SIZE - cap_data;
495 + *buflen = bufsize;
496 + while (bufsize--) {
497 + bcma_extpci_read_config(pc, dev, func, cap_data, buf,
498 + sizeof(u8));
499 + cap_data++;
500 + buf++;
501 + }
502 + }
503 +
504 + return cap_ptr;
505 +}
506 +
507 +/* If the root port is capable of returning Config Request
508 + * Retry Status (CRS) Completion Status to software then
509 + * enable the feature.
510 + */
511 +static void __devinit bcma_core_pci_enable_crs(struct bcma_drv_pci *pc)
512 +{
513 + u8 cap_ptr, root_ctrl, root_cap, dev;
514 + u16 val16;
515 + int i;
516 +
517 + cap_ptr = bcma_find_pci_capability(pc, 0, 0, PCI_CAP_ID_EXP, NULL,
518 + NULL);
519 + root_cap = cap_ptr + PCI_EXP_RTCAP;
520 + bcma_extpci_read_config(pc, 0, 0, root_cap, &val16, sizeof(u16));
521 + if (val16 & BCMA_CORE_PCI_RC_CRS_VISIBILITY) {
522 + /* Enable CRS software visibility */
523 + root_ctrl = cap_ptr + PCI_EXP_RTCTL;
524 + val16 = PCI_EXP_RTCTL_CRSSVE;
525 + bcma_extpci_read_config(pc, 0, 0, root_ctrl, &val16,
526 + sizeof(u16));
527 +
528 + /* Initiate a configuration request to read the vendor id
529 + * field of the device function's config space header after
530 + * 100 ms wait time from the end of Reset. If the device is
531 + * not done with its internal initialization, it must at
532 + * least return a completion TLP, with a completion status
533 + * of "Configuration Request Retry Status (CRS)". The root
534 + * complex must complete the request to the host by returning
535 + * a read-data value of 0001h for the Vendor ID field and
536 + * all 1s for any additional bytes included in the request.
537 + * Poll using the config reads for max wait time of 1 sec or
538 + * until we receive the successful completion status. Repeat
539 + * the procedure for all the devices.
540 + */
541 + for (dev = 1; dev < BCMA_PCI_SLOT_MAX; dev++) {
542 + for (i = 0; i < 100000; i++) {
543 + bcma_extpci_read_config(pc, dev, 0,
544 + PCI_VENDOR_ID, &val16,
545 + sizeof(val16));
546 + if (val16 != 0x1)
547 + break;
548 + udelay(10);
549 + }
550 + if (val16 == 0x1)
551 + pr_err("PCI: Broken device in slot %d\n", dev);
552 + }
553 + }
554 +}
555
556 void __devinit bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc)
557 {
558 - pr_err("No support for PCI core in hostmode yet\n");
559 + struct bcma_bus *bus = pc->core->bus;
560 + struct bcma_drv_pci_host *pc_host;
561 + u32 tmp;
562 + u32 pci_membase_1G;
563 + unsigned long io_map_base;
564 +
565 + pr_info("PCIEcore in host mode found\n");
566 +
567 + pc_host = kzalloc(sizeof(*pc_host), GFP_KERNEL);
568 + if (!pc_host) {
569 + pr_err("can not allocate memory");
570 + return;
571 + }
572 +
573 + pc->host_controller = pc_host;
574 + pc_host->pci_controller.io_resource = &pc_host->io_resource;
575 + pc_host->pci_controller.mem_resource = &pc_host->mem_resource;
576 + pc_host->pci_controller.pci_ops = &pc_host->pci_ops;
577 + pc_host->pdev = pc;
578 +
579 + pci_membase_1G = BCMA_SOC_PCI_DMA;
580 + pc_host->host_cfg_addr = BCMA_SOC_PCI_CFG;
581 +
582 + pc_host->pci_ops.read = bcma_core_pci_hostmode_read_config;
583 + pc_host->pci_ops.write = bcma_core_pci_hostmode_write_config;
584 +
585 + pc_host->mem_resource.name = "BCMA PCIcore external memory",
586 + pc_host->mem_resource.start = BCMA_SOC_PCI_DMA;
587 + pc_host->mem_resource.end = BCMA_SOC_PCI_DMA + BCMA_SOC_PCI_DMA_SZ - 1;
588 + pc_host->mem_resource.flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED;
589 +
590 + pc_host->io_resource.name = "BCMA PCIcore external I/O",
591 + pc_host->io_resource.start = 0x100;
592 + pc_host->io_resource.end = 0x7FF;
593 + pc_host->io_resource.flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED;
594 +
595 + /* Reset RC */
596 + udelay(3000);
597 + pcicore_write32(pc, BCMA_CORE_PCI_CTL, BCMA_CORE_PCI_CTL_RST_OE);
598 + udelay(1000);
599 + pcicore_write32(pc, BCMA_CORE_PCI_CTL, BCMA_CORE_PCI_CTL_RST |
600 + BCMA_CORE_PCI_CTL_RST_OE);
601 +
602 + /* 64 MB I/O access window. On 4716, use
603 + * sbtopcie0 to access the device registers. We
604 + * can't use address match 2 (1 GB window) region
605 + * as mips can't generate 64-bit address on the
606 + * backplane.
607 + */
608 + if (bus->chipinfo.id == 0x4716 || bus->chipinfo.id == 0x4748) {
609 + pc_host->mem_resource.start = BCMA_SOC_PCI_MEM;
610 + pc_host->mem_resource.end = BCMA_SOC_PCI_MEM +
611 + BCMA_SOC_PCI_MEM_SZ - 1;
612 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI0,
613 + BCMA_CORE_PCI_SBTOPCI_MEM | BCMA_SOC_PCI_MEM);
614 + } else if (bus->chipinfo.id == 0x5300) {
615 + tmp = BCMA_CORE_PCI_SBTOPCI_MEM;
616 + tmp |= BCMA_CORE_PCI_SBTOPCI_PREF;
617 + tmp |= BCMA_CORE_PCI_SBTOPCI_BURST;
618 + if (pc->core->core_unit == 0) {
619 + pc_host->mem_resource.start = BCMA_SOC_PCI_MEM;
620 + pc_host->mem_resource.end = BCMA_SOC_PCI_MEM +
621 + BCMA_SOC_PCI_MEM_SZ - 1;
622 + pci_membase_1G = BCMA_SOC_PCIE_DMA_H32;
623 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI0,
624 + tmp | BCMA_SOC_PCI_MEM);
625 + } else if (pc->core->core_unit == 1) {
626 + pc_host->mem_resource.start = BCMA_SOC_PCI1_MEM;
627 + pc_host->mem_resource.end = BCMA_SOC_PCI1_MEM +
628 + BCMA_SOC_PCI_MEM_SZ - 1;
629 + pci_membase_1G = BCMA_SOC_PCIE1_DMA_H32;
630 + pc_host->host_cfg_addr = BCMA_SOC_PCI1_CFG;
631 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI0,
632 + tmp | BCMA_SOC_PCI1_MEM);
633 + }
634 + } else
635 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI0,
636 + BCMA_CORE_PCI_SBTOPCI_IO);
637 +
638 + /* 64 MB configuration access window */
639 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI1, BCMA_CORE_PCI_SBTOPCI_CFG0);
640 +
641 + /* 1 GB memory access window */
642 + pcicore_write32(pc, BCMA_CORE_PCI_SBTOPCI2,
643 + BCMA_CORE_PCI_SBTOPCI_MEM | pci_membase_1G);
644 +
645 +
646 + /* As per PCI Express Base Spec 1.1 we need to wait for
647 + * at least 100 ms from the end of a reset (cold/warm/hot)
648 + * before issuing configuration requests to PCI Express
649 + * devices.
650 + */
651 + udelay(100000);
652 +
653 + bcma_core_pci_enable_crs(pc);
654 +
655 + /* Enable PCI bridge BAR0 memory & master access */
656 + tmp = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
657 + bcma_extpci_write_config(pc, 0, 0, PCI_COMMAND, &tmp, sizeof(tmp));
658 +
659 + /* Enable PCI interrupts */
660 + pcicore_write32(pc, BCMA_CORE_PCI_IMASK, BCMA_CORE_PCI_IMASK_INTA);
661 +
662 + /* Ok, ready to run, register it to the system.
663 + * The following needs change, if we want to port hostmode
664 + * to non-MIPS platform. */
665 + io_map_base = (unsigned long)ioremap_nocache(BCMA_SOC_PCI_MEM,
666 + 0x04000000);
667 + pc_host->pci_controller.io_map_base = io_map_base;
668 + set_io_port_base(pc_host->pci_controller.io_map_base);
669 + /* Give some time to the PCI controller to configure itself with the new
670 + * values. Not waiting at this point causes crashes of the machine. */
671 + mdelay(10);
672 + register_pci_controller(&pc_host->pci_controller);
673 + return;
674 +}
675 +
676 +/* Early PCI fixup for a device on the PCI-core bridge. */
677 +static void bcma_core_pci_fixup_pcibridge(struct pci_dev *dev)
678 +{
679 + if (dev->bus->ops->read != bcma_core_pci_hostmode_read_config) {
680 + /* This is not a device on the PCI-core bridge. */
681 + return;
682 + }
683 + if (PCI_SLOT(dev->devfn) != 0)
684 + return;
685 +
686 + pr_info("PCI: Fixing up bridge %s\n", pci_name(dev));
687 +
688 + /* Enable PCI bridge bus mastering and memory space */
689 + pci_set_master(dev);
690 + if (pcibios_enable_device(dev, ~0) < 0) {
691 + pr_err("PCI: BCMA bridge enable failed\n");
692 + return;
693 + }
694 +
695 + /* Enable PCI bridge BAR1 prefetch and burst */
696 + pci_write_config_dword(dev, BCMA_PCI_BAR1_CONTROL, 3);
697 +}
698 +DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, bcma_core_pci_fixup_pcibridge);
699 +
700 +/* Early PCI fixup for all PCI-cores to set the correct memory address. */
701 +static void bcma_core_pci_fixup_addresses(struct pci_dev *dev)
702 +{
703 + struct resource *res;
704 + int pos;
705 +
706 + if (dev->bus->ops->read != bcma_core_pci_hostmode_read_config) {
707 + /* This is not a device on the PCI-core bridge. */
708 + return;
709 + }
710 + if (PCI_SLOT(dev->devfn) == 0)
711 + return;
712 +
713 + pr_info("PCI: Fixing up addresses %s\n", pci_name(dev));
714 +
715 + for (pos = 0; pos < 6; pos++) {
716 + res = &dev->resource[pos];
717 + if (res->flags & (IORESOURCE_IO | IORESOURCE_MEM))
718 + pci_assign_resource(dev, pos);
719 + }
720 +}
721 +DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, bcma_core_pci_fixup_addresses);
722 +
723 +/* This function is called when doing a pci_enable_device().
724 + * We must first check if the device is a device on the PCI-core bridge. */
725 +int bcma_core_pci_plat_dev_init(struct pci_dev *dev)
726 +{
727 + struct bcma_drv_pci_host *pc_host;
728 +
729 + if (dev->bus->ops->read != bcma_core_pci_hostmode_read_config) {
730 + /* This is not a device on the PCI-core bridge. */
731 + return -ENODEV;
732 + }
733 + pc_host = container_of(dev->bus->ops, struct bcma_drv_pci_host,
734 + pci_ops);
735 +
736 + pr_info("PCI: Fixing up device %s\n", pci_name(dev));
737 +
738 + /* Fix up interrupt lines */
739 + dev->irq = bcma_core_mips_irq(pc_host->pdev->core) + 2;
740 + pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
741 +
742 + return 0;
743 +}
744 +EXPORT_SYMBOL(bcma_core_pci_plat_dev_init);
745 +
746 +/* PCI device IRQ mapping. */
747 +int bcma_core_pci_pcibios_map_irq(const struct pci_dev *dev)
748 +{
749 + struct bcma_drv_pci_host *pc_host;
750 +
751 + if (dev->bus->ops->read != bcma_core_pci_hostmode_read_config) {
752 + /* This is not a device on the PCI-core bridge. */
753 + return -ENODEV;
754 + }
755 +
756 + pc_host = container_of(dev->bus->ops, struct bcma_drv_pci_host,
757 + pci_ops);
758 + return bcma_core_mips_irq(pc_host->pdev->core) + 2;
759 }
760 +EXPORT_SYMBOL(bcma_core_pci_pcibios_map_irq);
761 --- a/include/linux/bcma/bcma_driver_pci.h
762 +++ b/include/linux/bcma/bcma_driver_pci.h
763 @@ -160,9 +160,40 @@ struct pci_dev;
764 /* PCIcore specific boardflags */
765 #define BCMA_CORE_PCI_BFL_NOPCI 0x00000400 /* Board leaves PCI floating */
766
767 +/* PCIE Config space accessing MACROS */
768 +#define BCMA_CORE_PCI_CFG_BUS_SHIFT 24 /* Bus shift */
769 +#define BCMA_CORE_PCI_CFG_SLOT_SHIFT 19 /* Slot/Device shift */
770 +#define BCMA_CORE_PCI_CFG_FUN_SHIFT 16 /* Function shift */
771 +#define BCMA_CORE_PCI_CFG_OFF_SHIFT 0 /* Register shift */
772 +
773 +#define BCMA_CORE_PCI_CFG_BUS_MASK 0xff /* Bus mask */
774 +#define BCMA_CORE_PCI_CFG_SLOT_MASK 0x1f /* Slot/Device mask */
775 +#define BCMA_CORE_PCI_CFG_FUN_MASK 7 /* Function mask */
776 +#define BCMA_CORE_PCI_CFG_OFF_MASK 0xfff /* Register mask */
777 +
778 +/* PCIE Root Capability Register bits (Host mode only) */
779 +#define BCMA_CORE_PCI_RC_CRS_VISIBILITY 0x0001
780 +
781 +struct bcma_drv_pci;
782 +
783 +struct bcma_drv_pci_host {
784 + struct bcma_drv_pci *pdev;
785 +
786 + u32 host_cfg_addr;
787 + spinlock_t cfgspace_lock;
788 +
789 + struct pci_controller pci_controller;
790 + struct pci_ops pci_ops;
791 + struct resource mem_resource;
792 + struct resource io_resource;
793 +};
794 +
795 struct bcma_drv_pci {
796 struct bcma_device *core;
797 u8 setup_done:1;
798 + u8 hostmode:1;
799 +
800 + struct bcma_drv_pci_host *host_controller;
801 };
802
803 /* Register access */
804 @@ -173,4 +204,7 @@ extern void __devinit bcma_core_pci_init
805 extern int bcma_core_pci_irq_ctl(struct bcma_drv_pci *pc,
806 struct bcma_device *core, bool enable);
807
808 +extern int bcma_core_pci_pcibios_map_irq(const struct pci_dev *dev);
809 +extern int bcma_core_pci_plat_dev_init(struct pci_dev *dev);
810 +
811 #endif /* LINUX_BCMA_DRIVER_PCI_H_ */
812 --- a/include/linux/bcma/bcma_regs.h
813 +++ b/include/linux/bcma/bcma_regs.h
814 @@ -56,4 +56,31 @@
815 #define BCMA_PCI_GPIO_XTAL 0x40 /* PCI config space GPIO 14 for Xtal powerup */
816 #define BCMA_PCI_GPIO_PLL 0x80 /* PCI config space GPIO 15 for PLL powerdown */
817
818 +/* SiliconBackplane Address Map.
819 + * All regions may not exist on all chips.
820 + */
821 +#define BCMA_SOC_SDRAM_BASE 0x00000000U /* Physical SDRAM */
822 +#define BCMA_SOC_PCI_MEM 0x08000000U /* Host Mode sb2pcitranslation0 (64 MB) */
823 +#define BCMA_SOC_PCI_MEM_SZ (64 * 1024 * 1024)
824 +#define BCMA_SOC_PCI_CFG 0x0c000000U /* Host Mode sb2pcitranslation1 (64 MB) */
825 +#define BCMA_SOC_SDRAM_SWAPPED 0x10000000U /* Byteswapped Physical SDRAM */
826 +#define BCMA_SOC_SDRAM_R2 0x80000000U /* Region 2 for sdram (512 MB) */
827 +
828 +
829 +#define BCMA_SOC_PCI_DMA 0x40000000U /* Client Mode sb2pcitranslation2 (1 GB) */
830 +#define BCMA_SOC_PCI_DMA2 0x80000000U /* Client Mode sb2pcitranslation2 (1 GB) */
831 +#define BCMA_SOC_PCI_DMA_SZ 0x40000000U /* Client Mode sb2pcitranslation2 size in bytes */
832 +#define BCMA_SOC_PCIE_DMA_L32 0x00000000U /* PCIE Client Mode sb2pcitranslation2
833 + * (2 ZettaBytes), low 32 bits
834 + */
835 +#define BCMA_SOC_PCIE_DMA_H32 0x80000000U /* PCIE Client Mode sb2pcitranslation2
836 + * (2 ZettaBytes), high 32 bits
837 + */
838 +
839 +#define BCMA_SOC_PCI1_MEM 0x40000000U /* Host Mode sb2pcitranslation0 (64 MB) */
840 +#define BCMA_SOC_PCI1_CFG 0x44000000U /* Host Mode sb2pcitranslation1 (64 MB) */
841 +#define BCMA_SOC_PCIE1_DMA_H32 0xc0000000U /* PCIE Client Mode sb2pcitranslation2
842 + * (2 ZettaBytes), high 32 bits
843 + */
844 +
845 #endif /* LINUX_BCMA_REGS_H_ */
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