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Linux 4.1.16
[linux/fpc-iii.git] / drivers / ssb / driver_pcicore.c
blob5fe1c22e289b881cacebbf081d7c245fad7d2098
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 <linux/ssb/ssb.h>
12 #include <linux/pci.h>
13 #include <linux/export.h>
14 #include <linux/delay.h>
15 #include <linux/ssb/ssb_embedded.h>
16
17 #include "ssb_private.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 SSB_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 SSB_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 ssb_info("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 ssb_info("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 ssb_err("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 ssb_info("PCI: Fixing latency timer of device %s to %u\n",
302 pci_name(dev), lat);
303 pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
304 }
305 DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_pcicore_fixup_pcibridge);
306
307 /* PCI device IRQ mapping. */
308 int ssb_pcicore_pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
309 {
310 if (dev->bus->ops != &ssb_pcicore_pciops) {
311 /* This is not a device on the PCI-core bridge. */
312 return -ENODEV;
313 }
314 return ssb_mips_irq(extpci_core->dev) + 2;
315 }
316
317 static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc)
318 {
319 u32 val;
320
321 if (WARN_ON(extpci_core))
322 return;
323 extpci_core = pc;
324
325 ssb_dbg("PCIcore in host mode found\n");
326 /* Reset devices on the external PCI bus */
327 val = SSB_PCICORE_CTL_RST_OE;
328 val |= SSB_PCICORE_CTL_CLK_OE;
329 pcicore_write32(pc, SSB_PCICORE_CTL, val);
330 val |= SSB_PCICORE_CTL_CLK; /* Clock on */
331 pcicore_write32(pc, SSB_PCICORE_CTL, val);
332 udelay(150); /* Assertion time demanded by the PCI standard */
333 val |= SSB_PCICORE_CTL_RST; /* Deassert RST# */
334 pcicore_write32(pc, SSB_PCICORE_CTL, val);
335 val = SSB_PCICORE_ARBCTL_INTERN;
336 pcicore_write32(pc, SSB_PCICORE_ARBCTL, val);
337 udelay(1); /* Assertion time demanded by the PCI standard */
338
339 if (pc->dev->bus->has_cardbus_slot) {
340 ssb_dbg("CardBus slot detected\n");
341 pc->cardbusmode = 1;
342 /* GPIO 1 resets the bridge */
343 ssb_gpio_out(pc->dev->bus, 1, 1);
344 ssb_gpio_outen(pc->dev->bus, 1, 1);
345 pcicore_write16(pc, SSB_PCICORE_SPROM(0),
346 pcicore_read16(pc, SSB_PCICORE_SPROM(0))
347 | 0x0400);
348 }
349
350 /* 64MB I/O window */
351 pcicore_write32(pc, SSB_PCICORE_SBTOPCI0,
352 SSB_PCICORE_SBTOPCI_IO);
353 /* 64MB config space */
354 pcicore_write32(pc, SSB_PCICORE_SBTOPCI1,
355 SSB_PCICORE_SBTOPCI_CFG0);
356 /* 1GB memory window */
357 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2,
358 SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA);
359
360 /*
361 * Accessing PCI config without a proper delay after devices reset (not
362 * GPIO reset) was causing reboots on WRT300N v1.0 (BCM4704).
363 * Tested delay 850 us lowered reboot chance to 50-80%, 1000 us fixed it
364 * completely. Flushing all writes was also tested but with no luck.
365 * The same problem was reported for WRT350N v1 (BCM4705), so we just
366 * sleep here unconditionally.
367 */
368 usleep_range(1000, 2000);
369
370 /* Enable PCI bridge BAR0 prefetch and burst */
371 val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
372 ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2);
373 /* Clear error conditions */
374 val = 0;
375 ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2);
376
377 /* Enable PCI interrupts */
378 pcicore_write32(pc, SSB_PCICORE_IMASK,
379 SSB_PCICORE_IMASK_INTA);
380
381 /* Ok, ready to run, register it to the system.
382 * The following needs change, if we want to port hostmode
383 * to non-MIPS platform. */
384 ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000);
385 set_io_port_base(ssb_pcicore_controller.io_map_base);
386 /* Give some time to the PCI controller to configure itself with the new
387 * values. Not waiting at this point causes crashes of the machine. */
388 mdelay(10);
389 register_pci_controller(&ssb_pcicore_controller);
390 }
391
392 static int pcicore_is_in_hostmode(struct ssb_pcicore *pc)
393 {
394 struct ssb_bus *bus = pc->dev->bus;
395 u16 chipid_top;
396 u32 tmp;
397
398 chipid_top = (bus->chip_id & 0xFF00);
399 if (chipid_top != 0x4700 &&
400 chipid_top != 0x5300)
401 return 0;
402
403 if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI)
404 return 0;
405
406 /* The 200-pin BCM4712 package does not bond out PCI. Even when
407 * PCI is bonded out, some boards may leave the pins floating. */
408 if (bus->chip_id == 0x4712) {
409 if (bus->chip_package == SSB_CHIPPACK_BCM4712S)
410 return 0;
411 if (bus->chip_package == SSB_CHIPPACK_BCM4712M)
412 return 0;
413 }
414 if (bus->chip_id == 0x5350)
415 return 0;
416
417 return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE)));
418 }
419 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
420
421 /**************************************************
422 * Workarounds.
423 **************************************************/
424
425 static void ssb_pcicore_fix_sprom_core_index(struct ssb_pcicore *pc)
426 {
427 u16 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(0));
428 if (((tmp & 0xF000) >> 12) != pc->dev->core_index) {
429 tmp &= ~0xF000;
430 tmp |= (pc->dev->core_index << 12);
431 pcicore_write16(pc, SSB_PCICORE_SPROM(0), tmp);
432 }
433 }
434
435 static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc)
436 {
437 return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80;
438 }
439
440 static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc)
441 {
442 const u8 serdes_pll_device = 0x1D;
443 const u8 serdes_rx_device = 0x1F;
444 u16 tmp;
445
446 ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */,
447 ssb_pcicore_polarity_workaround(pc));
448 tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */);
449 if (tmp & 0x4000)
450 ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000);
451 }
452
453 static void ssb_pcicore_pci_setup_workarounds(struct ssb_pcicore *pc)
454 {
455 struct ssb_device *pdev = pc->dev;
456 struct ssb_bus *bus = pdev->bus;
457 u32 tmp;
458
459 tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
460 tmp |= SSB_PCICORE_SBTOPCI_PREF;
461 tmp |= SSB_PCICORE_SBTOPCI_BURST;
462 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
463
464 if (pdev->id.revision < 5) {
465 tmp = ssb_read32(pdev, SSB_IMCFGLO);
466 tmp &= ~SSB_IMCFGLO_SERTO;
467 tmp |= 2;
468 tmp &= ~SSB_IMCFGLO_REQTO;
469 tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT;
470 ssb_write32(pdev, SSB_IMCFGLO, tmp);
471 ssb_commit_settings(bus);
472 } else if (pdev->id.revision >= 11) {
473 tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2);
474 tmp |= SSB_PCICORE_SBTOPCI_MRM;
475 pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp);
476 }
477 }
478
479 static void ssb_pcicore_pcie_setup_workarounds(struct ssb_pcicore *pc)
480 {
481 u32 tmp;
482 u8 rev = pc->dev->id.revision;
483
484 if (rev == 0 || rev == 1) {
485 /* TLP Workaround register. */
486 tmp = ssb_pcie_read(pc, 0x4);
487 tmp |= 0x8;
488 ssb_pcie_write(pc, 0x4, tmp);
489 }
490 if (rev == 1) {
491 /* DLLP Link Control register. */
492 tmp = ssb_pcie_read(pc, 0x100);
493 tmp |= 0x40;
494 ssb_pcie_write(pc, 0x100, tmp);
495 }
496
497 if (rev == 0) {
498 const u8 serdes_rx_device = 0x1F;
499
500 ssb_pcie_mdio_write(pc, serdes_rx_device,
501 2 /* Timer */, 0x8128);
502 ssb_pcie_mdio_write(pc, serdes_rx_device,
503 6 /* CDR */, 0x0100);
504 ssb_pcie_mdio_write(pc, serdes_rx_device,
505 7 /* CDR BW */, 0x1466);
506 } else if (rev == 3 || rev == 4 || rev == 5) {
507 /* TODO: DLLP Power Management Threshold */
508 ssb_pcicore_serdes_workaround(pc);
509 /* TODO: ASPM */
510 } else if (rev == 7) {
511 /* TODO: No PLL down */
512 }
513
514 if (rev >= 6) {
515 /* Miscellaneous Configuration Fixup */
516 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(5));
517 if (!(tmp & 0x8000))
518 pcicore_write16(pc, SSB_PCICORE_SPROM(5),
519 tmp | 0x8000);
520 }
521 }
522
523 /**************************************************
524 * Generic and Clientmode operation code.
525 **************************************************/
526
527 static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc)
528 {
529 struct ssb_device *pdev = pc->dev;
530 struct ssb_bus *bus = pdev->bus;
531
532 if (bus->bustype == SSB_BUSTYPE_PCI)
533 ssb_pcicore_fix_sprom_core_index(pc);
534
535 /* Disable PCI interrupts. */
536 ssb_write32(pdev, SSB_INTVEC, 0);
537
538 /* Additional PCIe always once-executed workarounds */
539 if (pc->dev->id.coreid == SSB_DEV_PCIE) {
540 ssb_pcicore_serdes_workaround(pc);
541 /* TODO: ASPM */
542 /* TODO: Clock Request Update */
543 }
544 }
545
546 void ssb_pcicore_init(struct ssb_pcicore *pc)
547 {
548 struct ssb_device *dev = pc->dev;
549
550 if (!dev)
551 return;
552 if (!ssb_device_is_enabled(dev))
553 ssb_device_enable(dev, 0);
554
555 #ifdef CONFIG_SSB_PCICORE_HOSTMODE
556 pc->hostmode = pcicore_is_in_hostmode(pc);
557 if (pc->hostmode)
558 ssb_pcicore_init_hostmode(pc);
559 #endif /* CONFIG_SSB_PCICORE_HOSTMODE */
560 if (!pc->hostmode)
561 ssb_pcicore_init_clientmode(pc);
562 }
563
564 static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address)
565 {
566 pcicore_write32(pc, 0x130, address);
567 return pcicore_read32(pc, 0x134);
568 }
569
570 static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data)
571 {
572 pcicore_write32(pc, 0x130, address);
573 pcicore_write32(pc, 0x134, data);
574 }
575
576 static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy)
577 {
578 const u16 mdio_control = 0x128;
579 const u16 mdio_data = 0x12C;
580 u32 v;
581 int i;
582
583 v = (1 << 30); /* Start of Transaction */
584 v |= (1 << 28); /* Write Transaction */
585 v |= (1 << 17); /* Turnaround */
586 v |= (0x1F << 18);
587 v |= (phy << 4);
588 pcicore_write32(pc, mdio_data, v);
589
590 udelay(10);
591 for (i = 0; i < 200; i++) {
592 v = pcicore_read32(pc, mdio_control);
593 if (v & 0x100 /* Trans complete */)
594 break;
595 msleep(1);
596 }
597 }
598
599 static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address)
600 {
601 const u16 mdio_control = 0x128;
602 const u16 mdio_data = 0x12C;
603 int max_retries = 10;
604 u16 ret = 0;
605 u32 v;
606 int i;
607
608 v = 0x80; /* Enable Preamble Sequence */
609 v |= 0x2; /* MDIO Clock Divisor */
610 pcicore_write32(pc, mdio_control, v);
611
612 if (pc->dev->id.revision >= 10) {
613 max_retries = 200;
614 ssb_pcie_mdio_set_phy(pc, device);
615 }
616
617 v = (1 << 30); /* Start of Transaction */
618 v |= (1 << 29); /* Read Transaction */
619 v |= (1 << 17); /* Turnaround */
620 if (pc->dev->id.revision < 10)
621 v |= (u32)device << 22;
622 v |= (u32)address << 18;
623 pcicore_write32(pc, mdio_data, v);
624 /* Wait for the device to complete the transaction */
625 udelay(10);
626 for (i = 0; i < max_retries; i++) {
627 v = pcicore_read32(pc, mdio_control);
628 if (v & 0x100 /* Trans complete */) {
629 udelay(10);
630 ret = pcicore_read32(pc, mdio_data);
631 break;
632 }
633 msleep(1);
634 }
635 pcicore_write32(pc, mdio_control, 0);
636 return ret;
637 }
638
639 static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
640 u8 address, u16 data)
641 {
642 const u16 mdio_control = 0x128;
643 const u16 mdio_data = 0x12C;
644 int max_retries = 10;
645 u32 v;
646 int i;
647
648 v = 0x80; /* Enable Preamble Sequence */
649 v |= 0x2; /* MDIO Clock Divisor */
650 pcicore_write32(pc, mdio_control, v);
651
652 if (pc->dev->id.revision >= 10) {
653 max_retries = 200;
654 ssb_pcie_mdio_set_phy(pc, device);
655 }
656
657 v = (1 << 30); /* Start of Transaction */
658 v |= (1 << 28); /* Write Transaction */
659 v |= (1 << 17); /* Turnaround */
660 if (pc->dev->id.revision < 10)
661 v |= (u32)device << 22;
662 v |= (u32)address << 18;
663 v |= data;
664 pcicore_write32(pc, mdio_data, v);
665 /* Wait for the device to complete the transaction */
666 udelay(10);
667 for (i = 0; i < max_retries; i++) {
668 v = pcicore_read32(pc, mdio_control);
669 if (v & 0x100 /* Trans complete */)
670 break;
671 msleep(1);
672 }
673 pcicore_write32(pc, mdio_control, 0);
674 }
675
676 int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc,
677 struct ssb_device *dev)
678 {
679 struct ssb_device *pdev = pc->dev;
680 struct ssb_bus *bus;
681 int err = 0;
682 u32 tmp;
683
684 if (dev->bus->bustype != SSB_BUSTYPE_PCI) {
685 /* This SSB device is not on a PCI host-bus. So the IRQs are
686 * not routed through the PCI core.
687 * So we must not enable routing through the PCI core. */
688 goto out;
689 }
690
691 if (!pdev)
692 goto out;
693 bus = pdev->bus;
694
695 might_sleep_if(pdev->id.coreid != SSB_DEV_PCI);
696
697 /* Enable interrupts for this device. */
698 if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) {
699 u32 coremask;
700
701 /* Calculate the "coremask" for the device. */
702 coremask = (1 << dev->core_index);
703
704 SSB_WARN_ON(bus->bustype != SSB_BUSTYPE_PCI);
705 err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp);
706 if (err)
707 goto out;
708 tmp |= coremask << 8;
709 err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp);
710 if (err)
711 goto out;
712 } else {
713 u32 intvec;
714
715 intvec = ssb_read32(pdev, SSB_INTVEC);
716 tmp = ssb_read32(dev, SSB_TPSFLAG);
717 tmp &= SSB_TPSFLAG_BPFLAG;
718 intvec |= (1 << tmp);
719 ssb_write32(pdev, SSB_INTVEC, intvec);
720 }
721
722 /* Setup PCIcore operation. */
723 if (pc->setup_done)
724 goto out;
725 if (pdev->id.coreid == SSB_DEV_PCI) {
726 ssb_pcicore_pci_setup_workarounds(pc);
727 } else {
728 WARN_ON(pdev->id.coreid != SSB_DEV_PCIE);
729 ssb_pcicore_pcie_setup_workarounds(pc);
730 }
731 pc->setup_done = 1;
732 out:
733 return err;
734 }
735 EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable);
Linux with added FPC-III support