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61e115a5 MB |
1 | /* |
2 | * Sonics Silicon Backplane | |
3 | * Broadcom PCI-core driver | |
4 | * | |
5 | * Copyright 2005, Broadcom Corporation | |
eb032b98 | 6 | * Copyright 2006, 2007, Michael Buesch <m@bues.ch> |
61e115a5 MB |
7 | * |
8 | * Licensed under the GNU/GPL. See COPYING for details. | |
9 | */ | |
10 | ||
11 | #include <linux/ssb/ssb.h> | |
12 | #include <linux/pci.h> | |
1014c22e | 13 | #include <linux/export.h> |
61e115a5 | 14 | #include <linux/delay.h> |
7cb44615 | 15 | #include <linux/ssb/ssb_embedded.h> |
61e115a5 MB |
16 | |
17 | #include "ssb_private.h" | |
18 | ||
ccc7c28a RM |
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); | |
61e115a5 MB |
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 | ||
7cb44615 MB |
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 | ||
61e115a5 MB |
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 | ||
61e115a5 MB |
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 | ||
7cb44615 | 77 | /* We do only have one cardbus device behind the bridge. */ |
a6c84622 | 78 | if (pc->cardbusmode && (dev > 1)) |
61e115a5 | 79 | goto out; |
7cb44615 | 80 | |
61e115a5 MB |
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, | |
fc71acc8 | 241 | .flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED, |
61e115a5 MB |
242 | }; |
243 | ||
244 | static struct resource ssb_pcicore_io_resource = { | |
245 | .name = "SSB PCIcore external I/O", | |
246 | .start = 0x100, | |
247 | .end = 0x7FF, | |
fc71acc8 | 248 | .flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED, |
61e115a5 MB |
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, | |
61e115a5 MB |
255 | }; |
256 | ||
aab547ce MB |
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 | { | |
aab547ce MB |
261 | if (d->bus->ops != &ssb_pcicore_pciops) { |
262 | /* This is not a device on the PCI-core bridge. */ | |
263 | return -ENODEV; | |
264 | } | |
265 | ||
33a606ac | 266 | ssb_info("PCI: Fixing up device %s\n", pci_name(d)); |
aab547ce | 267 | |
aab547ce MB |
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 | ||
33a606ac | 287 | ssb_info("PCI: Fixing up bridge %s\n", pci_name(dev)); |
aab547ce MB |
288 | |
289 | /* Enable PCI bridge bus mastering and memory space */ | |
290 | pci_set_master(dev); | |
291 | if (pcibios_enable_device(dev, ~0) < 0) { | |
33a606ac | 292 | ssb_err("PCI: SSB bridge enable failed\n"); |
aab547ce MB |
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; | |
33a606ac JP |
301 | ssb_info("PCI: Fixing latency timer of device %s to %u\n", |
302 | pci_name(dev), lat); | |
aab547ce MB |
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 | ||
163247c1 | 317 | static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc) |
61e115a5 MB |
318 | { |
319 | u32 val; | |
320 | ||
321 | if (WARN_ON(extpci_core)) | |
322 | return; | |
323 | extpci_core = pc; | |
324 | ||
33a606ac | 325 | ssb_dbg("PCIcore in host mode found\n"); |
61e115a5 MB |
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 | ||
7cb44615 | 339 | if (pc->dev->bus->has_cardbus_slot) { |
33a606ac | 340 | ssb_dbg("CardBus slot detected\n"); |
7cb44615 MB |
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 | } | |
61e115a5 MB |
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 | /* Enable PCI bridge BAR0 prefetch and burst */ | |
361 | val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; | |
362 | ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2); | |
363 | /* Clear error conditions */ | |
364 | val = 0; | |
365 | ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2); | |
366 | ||
367 | /* Enable PCI interrupts */ | |
368 | pcicore_write32(pc, SSB_PCICORE_IMASK, | |
369 | SSB_PCICORE_IMASK_INTA); | |
370 | ||
371 | /* Ok, ready to run, register it to the system. | |
372 | * The following needs change, if we want to port hostmode | |
373 | * to non-MIPS platform. */ | |
fc71acc8 MB |
374 | ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000); |
375 | set_io_port_base(ssb_pcicore_controller.io_map_base); | |
61e115a5 MB |
376 | /* Give some time to the PCI controller to configure itself with the new |
377 | * values. Not waiting at this point causes crashes of the machine. */ | |
378 | mdelay(10); | |
379 | register_pci_controller(&ssb_pcicore_controller); | |
380 | } | |
381 | ||
163247c1 | 382 | static int pcicore_is_in_hostmode(struct ssb_pcicore *pc) |
61e115a5 MB |
383 | { |
384 | struct ssb_bus *bus = pc->dev->bus; | |
385 | u16 chipid_top; | |
386 | u32 tmp; | |
387 | ||
388 | chipid_top = (bus->chip_id & 0xFF00); | |
389 | if (chipid_top != 0x4700 && | |
390 | chipid_top != 0x5300) | |
391 | return 0; | |
392 | ||
2d8d4fdf | 393 | if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI) |
61e115a5 MB |
394 | return 0; |
395 | ||
396 | /* The 200-pin BCM4712 package does not bond out PCI. Even when | |
397 | * PCI is bonded out, some boards may leave the pins floating. */ | |
398 | if (bus->chip_id == 0x4712) { | |
399 | if (bus->chip_package == SSB_CHIPPACK_BCM4712S) | |
400 | return 0; | |
401 | if (bus->chip_package == SSB_CHIPPACK_BCM4712M) | |
402 | return 0; | |
403 | } | |
404 | if (bus->chip_id == 0x5350) | |
405 | return 0; | |
406 | ||
407 | return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE))); | |
408 | } | |
409 | #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ | |
410 | ||
ccc7c28a RM |
411 | /************************************************** |
412 | * Workarounds. | |
413 | **************************************************/ | |
414 | ||
163247c1 | 415 | static void ssb_pcicore_fix_sprom_core_index(struct ssb_pcicore *pc) |
af335a6c RM |
416 | { |
417 | u16 tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(0)); | |
418 | if (((tmp & 0xF000) >> 12) != pc->dev->core_index) { | |
419 | tmp &= ~0xF000; | |
420 | tmp |= (pc->dev->core_index << 12); | |
421 | pcicore_write16(pc, SSB_PCICORE_SPROM(0), tmp); | |
422 | } | |
423 | } | |
424 | ||
ccc7c28a RM |
425 | static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc) |
426 | { | |
427 | return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80; | |
428 | } | |
429 | ||
430 | static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc) | |
431 | { | |
432 | const u8 serdes_pll_device = 0x1D; | |
433 | const u8 serdes_rx_device = 0x1F; | |
434 | u16 tmp; | |
435 | ||
436 | ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */, | |
437 | ssb_pcicore_polarity_workaround(pc)); | |
438 | tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */); | |
439 | if (tmp & 0x4000) | |
440 | ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000); | |
441 | } | |
61e115a5 | 442 | |
6e914101 RM |
443 | static void ssb_pcicore_pci_setup_workarounds(struct ssb_pcicore *pc) |
444 | { | |
445 | struct ssb_device *pdev = pc->dev; | |
446 | struct ssb_bus *bus = pdev->bus; | |
447 | u32 tmp; | |
448 | ||
449 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); | |
450 | tmp |= SSB_PCICORE_SBTOPCI_PREF; | |
451 | tmp |= SSB_PCICORE_SBTOPCI_BURST; | |
452 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); | |
453 | ||
454 | if (pdev->id.revision < 5) { | |
455 | tmp = ssb_read32(pdev, SSB_IMCFGLO); | |
456 | tmp &= ~SSB_IMCFGLO_SERTO; | |
457 | tmp |= 2; | |
458 | tmp &= ~SSB_IMCFGLO_REQTO; | |
459 | tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT; | |
460 | ssb_write32(pdev, SSB_IMCFGLO, tmp); | |
461 | ssb_commit_settings(bus); | |
462 | } else if (pdev->id.revision >= 11) { | |
463 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); | |
464 | tmp |= SSB_PCICORE_SBTOPCI_MRM; | |
465 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); | |
466 | } | |
467 | } | |
468 | ||
469 | static void ssb_pcicore_pcie_setup_workarounds(struct ssb_pcicore *pc) | |
470 | { | |
6e914101 | 471 | u32 tmp; |
5890a3ca | 472 | u8 rev = pc->dev->id.revision; |
6e914101 | 473 | |
5890a3ca | 474 | if (rev == 0 || rev == 1) { |
6e914101 RM |
475 | /* TLP Workaround register. */ |
476 | tmp = ssb_pcie_read(pc, 0x4); | |
477 | tmp |= 0x8; | |
478 | ssb_pcie_write(pc, 0x4, tmp); | |
479 | } | |
5890a3ca RM |
480 | if (rev == 1) { |
481 | /* DLLP Link Control register. */ | |
482 | tmp = ssb_pcie_read(pc, 0x100); | |
483 | tmp |= 0x40; | |
484 | ssb_pcie_write(pc, 0x100, tmp); | |
485 | } | |
486 | ||
487 | if (rev == 0) { | |
6e914101 RM |
488 | const u8 serdes_rx_device = 0x1F; |
489 | ||
490 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
491 | 2 /* Timer */, 0x8128); | |
492 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
493 | 6 /* CDR */, 0x0100); | |
494 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
495 | 7 /* CDR BW */, 0x1466); | |
5890a3ca RM |
496 | } else if (rev == 3 || rev == 4 || rev == 5) { |
497 | /* TODO: DLLP Power Management Threshold */ | |
498 | ssb_pcicore_serdes_workaround(pc); | |
499 | /* TODO: ASPM */ | |
500 | } else if (rev == 7) { | |
501 | /* TODO: No PLL down */ | |
502 | } | |
503 | ||
504 | if (rev >= 6) { | |
505 | /* Miscellaneous Configuration Fixup */ | |
506 | tmp = pcicore_read16(pc, SSB_PCICORE_SPROM(5)); | |
507 | if (!(tmp & 0x8000)) | |
508 | pcicore_write16(pc, SSB_PCICORE_SPROM(5), | |
509 | tmp | 0x8000); | |
6e914101 RM |
510 | } |
511 | } | |
512 | ||
61e115a5 MB |
513 | /************************************************** |
514 | * Generic and Clientmode operation code. | |
515 | **************************************************/ | |
516 | ||
163247c1 | 517 | static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc) |
61e115a5 | 518 | { |
329456d1 HM |
519 | struct ssb_device *pdev = pc->dev; |
520 | struct ssb_bus *bus = pdev->bus; | |
521 | ||
522 | if (bus->bustype == SSB_BUSTYPE_PCI) | |
523 | ssb_pcicore_fix_sprom_core_index(pc); | |
6ae8ec27 | 524 | |
61e115a5 | 525 | /* Disable PCI interrupts. */ |
329456d1 | 526 | ssb_write32(pdev, SSB_INTVEC, 0); |
6ae8ec27 RM |
527 | |
528 | /* Additional PCIe always once-executed workarounds */ | |
529 | if (pc->dev->id.coreid == SSB_DEV_PCIE) { | |
530 | ssb_pcicore_serdes_workaround(pc); | |
531 | /* TODO: ASPM */ | |
532 | /* TODO: Clock Request Update */ | |
533 | } | |
61e115a5 MB |
534 | } |
535 | ||
163247c1 | 536 | void ssb_pcicore_init(struct ssb_pcicore *pc) |
61e115a5 MB |
537 | { |
538 | struct ssb_device *dev = pc->dev; | |
61e115a5 MB |
539 | |
540 | if (!dev) | |
541 | return; | |
61e115a5 MB |
542 | if (!ssb_device_is_enabled(dev)) |
543 | ssb_device_enable(dev, 0); | |
544 | ||
545 | #ifdef CONFIG_SSB_PCICORE_HOSTMODE | |
546 | pc->hostmode = pcicore_is_in_hostmode(pc); | |
547 | if (pc->hostmode) | |
548 | ssb_pcicore_init_hostmode(pc); | |
549 | #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ | |
550 | if (!pc->hostmode) | |
551 | ssb_pcicore_init_clientmode(pc); | |
552 | } | |
553 | ||
554 | static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address) | |
555 | { | |
556 | pcicore_write32(pc, 0x130, address); | |
557 | return pcicore_read32(pc, 0x134); | |
558 | } | |
559 | ||
560 | static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data) | |
561 | { | |
562 | pcicore_write32(pc, 0x130, address); | |
563 | pcicore_write32(pc, 0x134, data); | |
564 | } | |
565 | ||
1b1c7acd RM |
566 | static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy) |
567 | { | |
568 | const u16 mdio_control = 0x128; | |
569 | const u16 mdio_data = 0x12C; | |
570 | u32 v; | |
571 | int i; | |
572 | ||
573 | v = (1 << 30); /* Start of Transaction */ | |
574 | v |= (1 << 28); /* Write Transaction */ | |
575 | v |= (1 << 17); /* Turnaround */ | |
576 | v |= (0x1F << 18); | |
577 | v |= (phy << 4); | |
578 | pcicore_write32(pc, mdio_data, v); | |
579 | ||
580 | udelay(10); | |
581 | for (i = 0; i < 200; i++) { | |
582 | v = pcicore_read32(pc, mdio_control); | |
583 | if (v & 0x100 /* Trans complete */) | |
584 | break; | |
585 | msleep(1); | |
586 | } | |
587 | } | |
588 | ||
ba91d1a1 RM |
589 | static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address) |
590 | { | |
591 | const u16 mdio_control = 0x128; | |
592 | const u16 mdio_data = 0x12C; | |
593 | int max_retries = 10; | |
594 | u16 ret = 0; | |
595 | u32 v; | |
596 | int i; | |
597 | ||
598 | v = 0x80; /* Enable Preamble Sequence */ | |
599 | v |= 0x2; /* MDIO Clock Divisor */ | |
600 | pcicore_write32(pc, mdio_control, v); | |
601 | ||
602 | if (pc->dev->id.revision >= 10) { | |
603 | max_retries = 200; | |
604 | ssb_pcie_mdio_set_phy(pc, device); | |
605 | } | |
606 | ||
607 | v = (1 << 30); /* Start of Transaction */ | |
608 | v |= (1 << 29); /* Read Transaction */ | |
609 | v |= (1 << 17); /* Turnaround */ | |
610 | if (pc->dev->id.revision < 10) | |
611 | v |= (u32)device << 22; | |
612 | v |= (u32)address << 18; | |
613 | pcicore_write32(pc, mdio_data, v); | |
614 | /* Wait for the device to complete the transaction */ | |
615 | udelay(10); | |
9be1cb39 | 616 | for (i = 0; i < max_retries; i++) { |
ba91d1a1 RM |
617 | v = pcicore_read32(pc, mdio_control); |
618 | if (v & 0x100 /* Trans complete */) { | |
619 | udelay(10); | |
620 | ret = pcicore_read32(pc, mdio_data); | |
621 | break; | |
622 | } | |
623 | msleep(1); | |
624 | } | |
625 | pcicore_write32(pc, mdio_control, 0); | |
626 | return ret; | |
627 | } | |
ba91d1a1 | 628 | |
61e115a5 MB |
629 | static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device, |
630 | u8 address, u16 data) | |
631 | { | |
632 | const u16 mdio_control = 0x128; | |
633 | const u16 mdio_data = 0x12C; | |
1b1c7acd | 634 | int max_retries = 10; |
61e115a5 MB |
635 | u32 v; |
636 | int i; | |
637 | ||
638 | v = 0x80; /* Enable Preamble Sequence */ | |
639 | v |= 0x2; /* MDIO Clock Divisor */ | |
640 | pcicore_write32(pc, mdio_control, v); | |
641 | ||
1b1c7acd RM |
642 | if (pc->dev->id.revision >= 10) { |
643 | max_retries = 200; | |
644 | ssb_pcie_mdio_set_phy(pc, device); | |
645 | } | |
646 | ||
61e115a5 MB |
647 | v = (1 << 30); /* Start of Transaction */ |
648 | v |= (1 << 28); /* Write Transaction */ | |
649 | v |= (1 << 17); /* Turnaround */ | |
1b1c7acd RM |
650 | if (pc->dev->id.revision < 10) |
651 | v |= (u32)device << 22; | |
61e115a5 MB |
652 | v |= (u32)address << 18; |
653 | v |= data; | |
654 | pcicore_write32(pc, mdio_data, v); | |
655 | /* Wait for the device to complete the transaction */ | |
656 | udelay(10); | |
1b1c7acd | 657 | for (i = 0; i < max_retries; i++) { |
61e115a5 MB |
658 | v = pcicore_read32(pc, mdio_control); |
659 | if (v & 0x100 /* Trans complete */) | |
660 | break; | |
661 | msleep(1); | |
662 | } | |
663 | pcicore_write32(pc, mdio_control, 0); | |
664 | } | |
665 | ||
61e115a5 MB |
666 | int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc, |
667 | struct ssb_device *dev) | |
668 | { | |
669 | struct ssb_device *pdev = pc->dev; | |
670 | struct ssb_bus *bus; | |
671 | int err = 0; | |
672 | u32 tmp; | |
673 | ||
9e095a68 MB |
674 | if (dev->bus->bustype != SSB_BUSTYPE_PCI) { |
675 | /* This SSB device is not on a PCI host-bus. So the IRQs are | |
676 | * not routed through the PCI core. | |
677 | * So we must not enable routing through the PCI core. */ | |
678 | goto out; | |
679 | } | |
680 | ||
61e115a5 MB |
681 | if (!pdev) |
682 | goto out; | |
683 | bus = pdev->bus; | |
684 | ||
a3bafeed MB |
685 | might_sleep_if(pdev->id.coreid != SSB_DEV_PCI); |
686 | ||
61e115a5 | 687 | /* Enable interrupts for this device. */ |
8b45499c | 688 | if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) { |
61e115a5 MB |
689 | u32 coremask; |
690 | ||
691 | /* Calculate the "coremask" for the device. */ | |
692 | coremask = (1 << dev->core_index); | |
693 | ||
8b45499c | 694 | SSB_WARN_ON(bus->bustype != SSB_BUSTYPE_PCI); |
61e115a5 MB |
695 | err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp); |
696 | if (err) | |
697 | goto out; | |
698 | tmp |= coremask << 8; | |
699 | err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp); | |
700 | if (err) | |
701 | goto out; | |
702 | } else { | |
703 | u32 intvec; | |
704 | ||
705 | intvec = ssb_read32(pdev, SSB_INTVEC); | |
51e8b885 MB |
706 | tmp = ssb_read32(dev, SSB_TPSFLAG); |
707 | tmp &= SSB_TPSFLAG_BPFLAG; | |
708 | intvec |= (1 << tmp); | |
61e115a5 MB |
709 | ssb_write32(pdev, SSB_INTVEC, intvec); |
710 | } | |
711 | ||
712 | /* Setup PCIcore operation. */ | |
713 | if (pc->setup_done) | |
714 | goto out; | |
715 | if (pdev->id.coreid == SSB_DEV_PCI) { | |
6e914101 | 716 | ssb_pcicore_pci_setup_workarounds(pc); |
61e115a5 MB |
717 | } else { |
718 | WARN_ON(pdev->id.coreid != SSB_DEV_PCIE); | |
6e914101 | 719 | ssb_pcicore_pcie_setup_workarounds(pc); |
61e115a5 MB |
720 | } |
721 | pc->setup_done = 1; | |
722 | out: | |
723 | return err; | |
724 | } | |
725 | EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable); |