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Merge 5.0-rc6 into driver-core-next
[linux/fpc-iii.git] / drivers / ssb / driver_pcicore.c
blob6a5622e0ded5443f02a8be85763a326be462be45
1 /*
2 * Sonics Silicon Backplane
3 * Broadcom PCI-core driver
4 *
5 * Copyright 2005, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
7 *
8 * Licensed under the GNU/GPL. See COPYING for details.
9 */
10
11 #include "ssb_private.h"
12
13 #include <linux/ssb/ssb.h>
14 #include <linux/pci.h>
15 #include <linux/export.h>
16 #include <linux/delay.h>
17 #include <linux/ssb/ssb_embedded.h>
18
19 static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address);
20 static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data);
21 static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address);
22 static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
23 u8 address, u16 data);
24
25 static inline
26 u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset)
27 {
28 return ssb_read32(pc->dev, offset);
29 }
30
31 static inline
32 void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value)
33 {
34 ssb_write32(pc->dev, offset, value);
35 }
36
37 static inline
38 u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset)
39 {
40 return ssb_read16(pc->dev, offset);
41 }
42
43 static inline
44 void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value)
45 {
46 ssb_write16(pc->dev, offset, value);
47 }
48
49 /**************************************************
50 * Code for hostmode operation.
51 **************************************************/
52
53 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
54
55 #include <asm/paccess.h>
56 /* Probe a 32bit value on the bus and catch bus exceptions.
57 * Returns nonzero on a bus exception.
58 * This is MIPS specific */
59 #define mips_busprobe32(val, addr) get_dbe((val), ((u32 *)(addr)))
60
61 /* Assume one-hot slot wiring */
62 #define SSB_PCI_SLOT_MAX 16
63
64 /* Global lock is OK, as we won't have more than one extpci anyway. */
65 static DEFINE_SPINLOCK(cfgspace_lock);
66 /* Core to access the external PCI config space. Can only have one. */
67 static struct ssb_pcicore *extpci_core;
68
69
70 static u32 get_cfgspace_addr(struct ssb_pcicore *pc,
71 unsigned int bus, unsigned int dev,
72 unsigned int func, unsigned int off)
73 {
74 u32 addr = 0;
75 u32 tmp;
76
77 /* We do only have one cardbus device behind the bridge. */
78 if (pc->cardbusmode && (dev > 1))
79 goto out;
80
81 if (bus == 0) {
82 /* Type 0 transaction */
83 if (unlikely(dev >= SSB_PCI_SLOT_MAX))
84 goto out;
85 /* Slide the window */
86 tmp = SSB_PCICORE_SBTOPCI_CFG0;
87 tmp |= ((1 << (dev + 16)) & SSB_PCICORE_SBTOPCI1_MASK);
88 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, tmp);
89 /* Calculate the address */
90 addr = SSB_PCI_CFG;
91 addr |= ((1 << (dev + 16)) & ~SSB_PCICORE_SBTOPCI1_MASK);
92 addr |= (func << 8);
93 addr |= (off & ~3);
94 } else {
95 /* Type 1 transaction */
96 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
97 SSB_PCICORE_SBTOPCI_CFG1);
98 /* Calculate the address */
99 addr = SSB_PCI_CFG;
100 addr |= (bus << 16);
101 addr |= (dev << 11);
102 addr |= (func << 8);
103 addr |= (off & ~3);
104 }
105 out:
106 return addr;
107 }
108
109 static int ssb_extpci_read_config(struct ssb_pcicore *pc,
110 unsigned int bus, unsigned int dev,
111 unsigned int func, unsigned int off,
112 void *buf, int len)
113 {
114 int err = -EINVAL;
115 u32 addr, val;
116 void __iomem *mmio;
117
118 WARN_ON(!pc->hostmode);
119 if (unlikely(len != 1 && len != 2 && len != 4))
120 goto out;
121 addr = get_cfgspace_addr(pc, bus, dev, func, off);
122 if (unlikely(!addr))
123 goto out;
124 err = -ENOMEM;
125 mmio = ioremap_nocache(addr, len);
126 if (!mmio)
127 goto out;
128
129 if (mips_busprobe32(val, mmio)) {
130 val = 0xffffffff;
131 goto unmap;
132 }
133
134 val = readl(mmio);
135 val >>= (8 * (off & 3));
136
137 switch (len) {
138 case 1:
139 *((u8 *)buf) = (u8)val;
140 break;
141 case 2:
142 *((u16 *)buf) = (u16)val;
143 break;
144 case 4:
145 *((u32 *)buf) = (u32)val;
146 break;
147 }
148 err = 0;
149 unmap:
150 iounmap(mmio);
151 out:
152 return err;
153 }
154
155 static int ssb_extpci_write_config(struct ssb_pcicore *pc,
156 unsigned int bus, unsigned int dev,
157 unsigned int func, unsigned int off,
158 const void *buf, int len)
159 {
160 int err = -EINVAL;
161 u32 addr, val = 0;
162 void __iomem *mmio;
163
164 WARN_ON(!pc->hostmode);
165 if (unlikely(len != 1 && len != 2 && len != 4))
166 goto out;
167 addr = get_cfgspace_addr(pc, bus, dev, func, off);
168 if (unlikely(!addr))
169 goto out;
170 err = -ENOMEM;
171 mmio = ioremap_nocache(addr, len);
172 if (!mmio)
173 goto out;
174
175 if (mips_busprobe32(val, mmio)) {
176 val = 0xffffffff;
177 goto unmap;
178 }
179
180 switch (len) {
181 case 1:
182 val = readl(mmio);
183 val &= ~(0xFF << (8 * (off & 3)));
184 val |= *((const u8 *)buf) << (8 * (off & 3));
185 break;
186 case 2:
187 val = readl(mmio);
188 val &= ~(0xFFFF << (8 * (off & 3)));
189 val |= *((const u16 *)buf) << (8 * (off & 3));
190 break;
191 case 4:
192 val = *((const u32 *)buf);
193 break;
194 }
195 writel(val, mmio);
196
197 err = 0;
198 unmap:
199 iounmap(mmio);
200 out:
201 return err;
202 }
203
204 static int ssb_pcicore_read_config(struct pci_bus *bus, unsigned int devfn,
205 int reg, int size, u32 *val)
206 {
207 unsigned long flags;
208 int err;
209
210 spin_lock_irqsave(&cfgspace_lock, flags);
211 err = ssb_extpci_read_config(extpci_core, bus->number, PCI_SLOT(devfn),
212 PCI_FUNC(devfn), reg, val, size);
213 spin_unlock_irqrestore(&cfgspace_lock, flags);
214
215 return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
216 }
217
218 static int ssb_pcicore_write_config(struct pci_bus *bus, unsigned int devfn,
219 int reg, int size, u32 val)
220 {
221 unsigned long flags;
222 int err;
223
224 spin_lock_irqsave(&cfgspace_lock, flags);
225 err = ssb_extpci_write_config(extpci_core, bus->number, PCI_SLOT(devfn),
226 PCI_FUNC(devfn), reg, &val, size);
227 spin_unlock_irqrestore(&cfgspace_lock, flags);
228
229 return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
230 }
231
232 static struct pci_ops ssb_pcicore_pciops = {
233 .read = ssb_pcicore_read_config,
234 .write = ssb_pcicore_write_config,
235 };
236
237 static struct resource ssb_pcicore_mem_resource = {
238 .name = "SSB PCIcore external memory",
239 .start = SSB_PCI_DMA,
240 .end = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1,
241 .flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED,
242 };
243
244 static struct resource ssb_pcicore_io_resource = {
245 .name = "SSB PCIcore external I/O",
246 .start = 0x100,
247 .end = 0x7FF,
248 .flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED,
249 };
250
251 static struct pci_controller ssb_pcicore_controller = {
252 .pci_ops = &ssb_pcicore_pciops,
253 .io_resource = &ssb_pcicore_io_resource,
254 .mem_resource = &ssb_pcicore_mem_resource,
255 };
256
257 /* This function is called when doing a pci_enable_device().
258 * We must first check if the device is a device on the PCI-core bridge. */
259 int ssb_pcicore_plat_dev_init(struct pci_dev *d)
260 {
261 if (d->bus->ops != &ssb_pcicore_pciops) {
262 /* This is not a device on the PCI-core bridge. */
263 return -ENODEV;
264 }
265
266 dev_info(&d->dev, "PCI: Fixing up device %s\n", pci_name(d));
267
268 /* Fix up interrupt lines */
269 d->irq = ssb_mips_irq(extpci_core->dev) + 2;
270 pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);
271
272 return 0;
273 }
274
275 /* Early PCI fixup for a device on the PCI-core bridge. */
276 static void ssb_pcicore_fixup_pcibridge(struct pci_dev *dev)
277 {
278 u8 lat;
279
280 if (dev->bus->ops != &ssb_pcicore_pciops) {
281 /* This is not a device on the PCI-core bridge. */
282 return;
283 }
284 if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) != 0)
285 return;
286
287 dev_info(&dev->dev, "PCI: Fixing up bridge %s\n", pci_name(dev));
288
289 /* Enable PCI bridge bus mastering and memory space */
290 pci_set_master(dev);
291 if (pcibios_enable_device(dev, ~0) < 0) {
292 dev_err(&dev->dev, "PCI: SSB bridge enable failed\n");
293 return;
294 }
295
296 /* Enable PCI bridge BAR1 prefetch and burst */
297 pci_write_config_dword(dev, SSB_BAR1_CONTROL, 3);
298
299 /* Make sure our latency is high enough to handle the devices behind us */
300 lat = 168;
301 dev_info(&dev->dev,
302 "PCI: Fixing latency timer of device %s to %u\n",
303 pci_name(dev), lat);
304 pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
305 }
306 DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_pcicore_fixup_pcibridge);
307
308 /* PCI device IRQ mapping. */
309 int ssb_pcicore_pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
310 {
311 if (dev->bus->ops != &ssb_pcicore_pciops) {
312 /* This is not a device on the PCI-core bridge. */
313 return -ENODEV;
314 }
315 return ssb_mips_irq(extpci_core->dev) + 2;
316 }
317
318 static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc)
319 {
320 u32 val;
321
322 if (WARN_ON(extpci_core))
323 return;
324 extpci_core = pc;
325
326 dev_dbg(pc->dev->dev, "PCIcore in host mode found\n");
327 /* Reset devices on the external PCI bus */
328 val = SSB_PCICORE_CTL_RST_OE;
329 val |= SSB_PCICORE_CTL_CLK_OE;
330 pcicore_write32(pc, SSB_PCICORE_CTL, val);
331 val |= SSB_PCICORE_CTL_CLK; /* Clock on */
332 pcicore_write32(pc, SSB_PCICORE_CTL, val);
333 udelay(150); /* Assertion time demanded by the PCI standard */
334 val |= SSB_PCICORE_CTL_RST; /* Deassert RST# */
335 pcicore_write32(pc, SSB_PCICORE_CTL, val);
336 val = SSB_PCICORE_ARBCTL_INTERN;
337 pcicore_write32(pc, SSB_PCICORE_ARBCTL, val);
338 udelay(1); /* Assertion time demanded by the PCI standard */
339
340 if (pc->dev->bus->has_cardbus_slot) {
341 dev_dbg(pc->dev->dev, "CardBus slot detected\n");
342 pc->cardbusmode = 1;
343 /* GPIO 1 resets the bridge */
344 ssb_gpio_out(pc->dev->bus, 1, 1);
345 ssb_gpio_outen(pc->dev->bus, 1, 1);
346 pcicore_write16(pc, SSB_PCICORE_SPROM(0),
347 pcicore_read16(pc, SSB_PCICORE_SPROM(0))
348 | 0x0400);
349 }
350
351 /* 64MB I/O window */
352 pcicore_write32(pc, SSB_PCICORE_SBTOPCI0,
353 SSB_PCICORE_SBTOPCI_IO);
354 /* 64MB config space */
355 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
356 SSB_PCICORE_SBTOPCI_CFG0);
357 /* 1GB memory window */
358 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2,
359 SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA);
360
361 /*
362 * Accessing PCI config without a proper delay after devices reset (not
363 * GPIO reset) was causing reboots on WRT300N v1.0 (BCM4704).
364 * Tested delay 850 us lowered reboot chance to 50-80%, 1000 us fixed it
365 * completely. Flushing all writes was also tested but with no luck.
366 * The same problem was reported for WRT350N v1 (BCM4705), so we just
367 * sleep here unconditionally.
368 */
369 usleep_range(1000, 2000);
370
371 /* Enable PCI bridge BAR0 prefetch and burst */
372 val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
373 ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2);
374 /* Clear error conditions */
375 val = 0;
376 ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2);
377
378 /* Enable PCI interrupts */
379 pcicore_write32(pc, SSB_PCICORE_IMASK,
380 SSB_PCICORE_IMASK_INTA);
381
382 /* Ok, ready to run, register it to the system.
383 * The following needs change, if we want to port hostmode
384 * to non-MIPS platform. */
385 ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000);
386 set_io_port_base(ssb_pcicore_controller.io_map_base);
387 /* Give some time to the PCI controller to configure itself with the new
388 * values. Not waiting at this point causes crashes of the machine. */
389 mdelay(10);
390 register_pci_controller(&ssb_pcicore_controller);
391 }
392
393 static int pcicore_is_in_hostmode(struct ssb_pcicore *pc)
394 {
395 struct ssb_bus *bus = pc->dev->bus;
396 u16 chipid_top;
397 u32 tmp;
398
399 chipid_top = (bus->chip_id & 0xFF00);
400 if (chipid_top != 0x4700 &&
401 chipid_top != 0x5300)
402 return 0;
403
404 if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI)
405 return 0;
406
407 /* The 200-pin BCM4712 package does not bond out PCI. Even when
408 * PCI is bonded out, some boards may leave the pins floating. */
409 if (bus->chip_id == 0x4712) {
410 if (bus->chip_package == SSB_CHIPPACK_BCM4712S)
411 return 0;
412 if (bus->chip_package == SSB_CHIPPACK_BCM4712M)
413 return 0;
414 }
415 if (bus->chip_id == 0x5350)
416 return 0;
417
418 return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE)));
419 }
420 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
421
422 /**************************************************
423 * Workarounds.
424 **************************************************/
425
426 static void ssb_pcicore_fix_sprom_core_index(struct ssb_pcicore *pc)
427 {
428 u16 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(0));
429 if (((tmp & 0xF000) >> 12) != pc->dev->core_index) {
430 tmp &= ~0xF000;
431 tmp |= (pc->dev->core_index << 12);
432 pcicore_write16(pc, SSB_PCICORE_SPROM(0), tmp);
433 }
434 }
435
436 static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc)
437 {
438 return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80;
439 }
440
441 static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc)
442 {
443 const u8 serdes_pll_device = 0x1D;
444 const u8 serdes_rx_device = 0x1F;
445 u16 tmp;
446
447 ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */,
448 ssb_pcicore_polarity_workaround(pc));
449 tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */);
450 if (tmp & 0x4000)
451 ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000);
452 }
453
454 static void ssb_pcicore_pci_setup_workarounds(struct ssb_pcicore *pc)
455 {
456 struct ssb_device *pdev = pc->dev;
457 struct ssb_bus *bus = pdev->bus;
458 u32 tmp;
459
460 tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
461 tmp |= SSB_PCICORE_SBTOPCI_PREF;
462 tmp |= SSB_PCICORE_SBTOPCI_BURST;
463 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
464
465 if (pdev->id.revision < 5) {
466 tmp = ssb_read32(pdev, SSB_IMCFGLO);
467 tmp &= ~SSB_IMCFGLO_SERTO;
468 tmp |= 2;
469 tmp &= ~SSB_IMCFGLO_REQTO;
470 tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT;
471 ssb_write32(pdev, SSB_IMCFGLO, tmp);
472 ssb_commit_settings(bus);
473 } else if (pdev->id.revision >= 11) {
474 tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
475 tmp |= SSB_PCICORE_SBTOPCI_MRM;
476 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
477 }
478 }
479
480 static void ssb_pcicore_pcie_setup_workarounds(struct ssb_pcicore *pc)
481 {
482 u32 tmp;
483 u8 rev = pc->dev->id.revision;
484
485 if (rev == 0 || rev == 1) {
486 /* TLP Workaround register. */
487 tmp = ssb_pcie_read(pc, 0x4);
488 tmp |= 0x8;
489 ssb_pcie_write(pc, 0x4, tmp);
490 }
491 if (rev == 1) {
492 /* DLLP Link Control register. */
493 tmp = ssb_pcie_read(pc, 0x100);
494 tmp |= 0x40;
495 ssb_pcie_write(pc, 0x100, tmp);
496 }
497
498 if (rev == 0) {
499 const u8 serdes_rx_device = 0x1F;
500
501 ssb_pcie_mdio_write(pc, serdes_rx_device,
502 2 /* Timer */, 0x8128);
503 ssb_pcie_mdio_write(pc, serdes_rx_device,
504 6 /* CDR */, 0x0100);
505 ssb_pcie_mdio_write(pc, serdes_rx_device,
506 7 /* CDR BW */, 0x1466);
507 } else if (rev == 3 || rev == 4 || rev == 5) {
508 /* TODO: DLLP Power Management Threshold */
509 ssb_pcicore_serdes_workaround(pc);
510 /* TODO: ASPM */
511 } else if (rev == 7) {
512 /* TODO: No PLL down */
513 }
514
515 if (rev >= 6) {
516 /* Miscellaneous Configuration Fixup */
517 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(5));
518 if (!(tmp & 0x8000))
519 pcicore_write16(pc, SSB_PCICORE_SPROM(5),
520 tmp | 0x8000);
521 }
522 }
523
524 /**************************************************
525 * Generic and Clientmode operation code.
526 **************************************************/
527
528 static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc)
529 {
530 struct ssb_device *pdev = pc->dev;
531 struct ssb_bus *bus = pdev->bus;
532
533 if (bus->bustype == SSB_BUSTYPE_PCI)
534 ssb_pcicore_fix_sprom_core_index(pc);
535
536 /* Disable PCI interrupts. */
537 ssb_write32(pdev, SSB_INTVEC, 0);
538
539 /* Additional PCIe always once-executed workarounds */
540 if (pc->dev->id.coreid == SSB_DEV_PCIE) {
541 ssb_pcicore_serdes_workaround(pc);
542 /* TODO: ASPM */
543 /* TODO: Clock Request Update */
544 }
545 }
546
547 void ssb_pcicore_init(struct ssb_pcicore *pc)
548 {
549 struct ssb_device *dev = pc->dev;
550
551 if (!dev)
552 return;
553 if (!ssb_device_is_enabled(dev))
554 ssb_device_enable(dev, 0);
555
556 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
557 pc->hostmode = pcicore_is_in_hostmode(pc);
558 if (pc->hostmode)
559 ssb_pcicore_init_hostmode(pc);
560 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
561 if (!pc->hostmode)
562 ssb_pcicore_init_clientmode(pc);
563 }
564
565 static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address)
566 {
567 pcicore_write32(pc, 0x130, address);
568 return pcicore_read32(pc, 0x134);
569 }
570
571 static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data)
572 {
573 pcicore_write32(pc, 0x130, address);
574 pcicore_write32(pc, 0x134, data);
575 }
576
577 static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy)
578 {
579 const u16 mdio_control = 0x128;
580 const u16 mdio_data = 0x12C;
581 u32 v;
582 int i;
583
584 v = (1 << 30); /* Start of Transaction */
585 v |= (1 << 28); /* Write Transaction */
586 v |= (1 << 17); /* Turnaround */
587 v |= (0x1F << 18);
588 v |= (phy << 4);
589 pcicore_write32(pc, mdio_data, v);
590
591 udelay(10);
592 for (i = 0; i < 200; i++) {
593 v = pcicore_read32(pc, mdio_control);
594 if (v & 0x100 /* Trans complete */)
595 break;
596 msleep(1);
597 }
598 }
599
600 static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address)
601 {
602 const u16 mdio_control = 0x128;
603 const u16 mdio_data = 0x12C;
604 int max_retries = 10;
605 u16 ret = 0;
606 u32 v;
607 int i;
608
609 v = 0x80; /* Enable Preamble Sequence */
610 v |= 0x2; /* MDIO Clock Divisor */
611 pcicore_write32(pc, mdio_control, v);
612
613 if (pc->dev->id.revision >= 10) {
614 max_retries = 200;
615 ssb_pcie_mdio_set_phy(pc, device);
616 }
617
618 v = (1 << 30); /* Start of Transaction */
619 v |= (1 << 29); /* Read Transaction */
620 v |= (1 << 17); /* Turnaround */
621 if (pc->dev->id.revision < 10)
622 v |= (u32)device << 22;
623 v |= (u32)address << 18;
624 pcicore_write32(pc, mdio_data, v);
625 /* Wait for the device to complete the transaction */
626 udelay(10);
627 for (i = 0; i < max_retries; i++) {
628 v = pcicore_read32(pc, mdio_control);
629 if (v & 0x100 /* Trans complete */) {
630 udelay(10);
631 ret = pcicore_read32(pc, mdio_data);
632 break;
633 }
634 msleep(1);
635 }
636 pcicore_write32(pc, mdio_control, 0);
637 return ret;
638 }
639
640 static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
641 u8 address, u16 data)
642 {
643 const u16 mdio_control = 0x128;
644 const u16 mdio_data = 0x12C;
645 int max_retries = 10;
646 u32 v;
647 int i;
648
649 v = 0x80; /* Enable Preamble Sequence */
650 v |= 0x2; /* MDIO Clock Divisor */
651 pcicore_write32(pc, mdio_control, v);
652
653 if (pc->dev->id.revision >= 10) {
654 max_retries = 200;
655 ssb_pcie_mdio_set_phy(pc, device);
656 }
657
658 v = (1 << 30); /* Start of Transaction */
659 v |= (1 << 28); /* Write Transaction */
660 v |= (1 << 17); /* Turnaround */
661 if (pc->dev->id.revision < 10)
662 v |= (u32)device << 22;
663 v |= (u32)address << 18;
664 v |= data;
665 pcicore_write32(pc, mdio_data, v);
666 /* Wait for the device to complete the transaction */
667 udelay(10);
668 for (i = 0; i < max_retries; i++) {
669 v = pcicore_read32(pc, mdio_control);
670 if (v & 0x100 /* Trans complete */)
671 break;
672 msleep(1);
673 }
674 pcicore_write32(pc, mdio_control, 0);
675 }
676
677 int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
678 struct ssb_device *dev)
679 {
680 struct ssb_device *pdev = pc->dev;
681 struct ssb_bus *bus;
682 int err = 0;
683 u32 tmp;
684
685 if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
686 /* This SSB device is not on a PCI host-bus. So the IRQs are
687 * not routed through the PCI core.
688 * So we must not enable routing through the PCI core. */
689 goto out;
690 }
691
692 if (!pdev)
693 goto out;
694 bus = pdev->bus;
695
696 might_sleep_if(pdev->id.coreid != SSB_DEV_PCI);
697
698 /* Enable interrupts for this device. */
699 if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) {
700 u32 coremask;
701
702 /* Calculate the "coremask" for the device. */
703 coremask = (1 << dev->core_index);
704
705 WARN_ON(bus->bustype != SSB_BUSTYPE_PCI);
706 err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp);
707 if (err)
708 goto out;
709 tmp |= coremask << 8;
710 err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp);
711 if (err)
712 goto out;
713 } else {
714 u32 intvec;
715
716 intvec = ssb_read32(pdev, SSB_INTVEC);
717 tmp = ssb_read32(dev, SSB_TPSFLAG);
718 tmp &= SSB_TPSFLAG_BPFLAG;
719 intvec |= (1 << tmp);
720 ssb_write32(pdev, SSB_INTVEC, intvec);
721 }
722
723 /* Setup PCIcore operation. */
724 if (pc->setup_done)
725 goto out;
726 if (pdev->id.coreid == SSB_DEV_PCI) {
727 ssb_pcicore_pci_setup_workarounds(pc);
728 } else {
729 WARN_ON(pdev->id.coreid != SSB_DEV_PCIE);
730 ssb_pcicore_pcie_setup_workarounds(pc);
731 }
732 pc->setup_done = 1;
733 out:
734 return err;
735 }
736 EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable);
Linux with added FPC-III support