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61e115a5 MB |
1 | /* |
2 | * Sonics Silicon Backplane | |
3 | * Broadcom PCI-core driver | |
4 | * | |
5 | * Copyright 2005, Broadcom Corporation | |
6 | * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de> | |
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/delay.h> | |
7cb44615 | 14 | #include <linux/ssb/ssb_embedded.h> |
61e115a5 MB |
15 | |
16 | #include "ssb_private.h" | |
17 | ||
ccc7c28a RM |
18 | static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address); |
19 | static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data); | |
20 | static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address); | |
21 | static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device, | |
22 | u8 address, u16 data); | |
61e115a5 MB |
23 | |
24 | static inline | |
25 | u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset) | |
26 | { | |
27 | return ssb_read32(pc->dev, offset); | |
28 | } | |
29 | ||
30 | static inline | |
31 | void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value) | |
32 | { | |
33 | ssb_write32(pc->dev, offset, value); | |
34 | } | |
35 | ||
7cb44615 MB |
36 | static inline |
37 | u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset) | |
38 | { | |
39 | return ssb_read16(pc->dev, offset); | |
40 | } | |
41 | ||
42 | static inline | |
43 | void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value) | |
44 | { | |
45 | ssb_write16(pc->dev, offset, value); | |
46 | } | |
47 | ||
61e115a5 MB |
48 | /************************************************** |
49 | * Code for hostmode operation. | |
50 | **************************************************/ | |
51 | ||
52 | #ifdef CONFIG_SSB_PCICORE_HOSTMODE | |
53 | ||
54 | #include <asm/paccess.h> | |
55 | /* Probe a 32bit value on the bus and catch bus exceptions. | |
56 | * Returns nonzero on a bus exception. | |
57 | * This is MIPS specific */ | |
58 | #define mips_busprobe32(val, addr) get_dbe((val), ((u32 *)(addr))) | |
59 | ||
60 | /* Assume one-hot slot wiring */ | |
61 | #define SSB_PCI_SLOT_MAX 16 | |
62 | ||
63 | /* Global lock is OK, as we won't have more than one extpci anyway. */ | |
64 | static DEFINE_SPINLOCK(cfgspace_lock); | |
65 | /* Core to access the external PCI config space. Can only have one. */ | |
66 | static struct ssb_pcicore *extpci_core; | |
67 | ||
61e115a5 MB |
68 | |
69 | static u32 get_cfgspace_addr(struct ssb_pcicore *pc, | |
70 | unsigned int bus, unsigned int dev, | |
71 | unsigned int func, unsigned int off) | |
72 | { | |
73 | u32 addr = 0; | |
74 | u32 tmp; | |
75 | ||
7cb44615 MB |
76 | /* We do only have one cardbus device behind the bridge. */ |
77 | if (pc->cardbusmode && (dev >= 1)) | |
61e115a5 | 78 | goto out; |
7cb44615 | 79 | |
61e115a5 MB |
80 | if (bus == 0) { |
81 | /* Type 0 transaction */ | |
82 | if (unlikely(dev >= SSB_PCI_SLOT_MAX)) | |
83 | goto out; | |
84 | /* Slide the window */ | |
85 | tmp = SSB_PCICORE_SBTOPCI_CFG0; | |
86 | tmp |= ((1 << (dev + 16)) & SSB_PCICORE_SBTOPCI1_MASK); | |
87 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, tmp); | |
88 | /* Calculate the address */ | |
89 | addr = SSB_PCI_CFG; | |
90 | addr |= ((1 << (dev + 16)) & ~SSB_PCICORE_SBTOPCI1_MASK); | |
91 | addr |= (func << 8); | |
92 | addr |= (off & ~3); | |
93 | } else { | |
94 | /* Type 1 transaction */ | |
95 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, | |
96 | SSB_PCICORE_SBTOPCI_CFG1); | |
97 | /* Calculate the address */ | |
98 | addr = SSB_PCI_CFG; | |
99 | addr |= (bus << 16); | |
100 | addr |= (dev << 11); | |
101 | addr |= (func << 8); | |
102 | addr |= (off & ~3); | |
103 | } | |
104 | out: | |
105 | return addr; | |
106 | } | |
107 | ||
108 | static int ssb_extpci_read_config(struct ssb_pcicore *pc, | |
109 | unsigned int bus, unsigned int dev, | |
110 | unsigned int func, unsigned int off, | |
111 | void *buf, int len) | |
112 | { | |
113 | int err = -EINVAL; | |
114 | u32 addr, val; | |
115 | void __iomem *mmio; | |
116 | ||
117 | SSB_WARN_ON(!pc->hostmode); | |
118 | if (unlikely(len != 1 && len != 2 && len != 4)) | |
119 | goto out; | |
120 | addr = get_cfgspace_addr(pc, bus, dev, func, off); | |
121 | if (unlikely(!addr)) | |
122 | goto out; | |
123 | err = -ENOMEM; | |
124 | mmio = ioremap_nocache(addr, len); | |
125 | if (!mmio) | |
126 | goto out; | |
127 | ||
128 | if (mips_busprobe32(val, mmio)) { | |
129 | val = 0xffffffff; | |
130 | goto unmap; | |
131 | } | |
132 | ||
133 | val = readl(mmio); | |
134 | val >>= (8 * (off & 3)); | |
135 | ||
136 | switch (len) { | |
137 | case 1: | |
138 | *((u8 *)buf) = (u8)val; | |
139 | break; | |
140 | case 2: | |
141 | *((u16 *)buf) = (u16)val; | |
142 | break; | |
143 | case 4: | |
144 | *((u32 *)buf) = (u32)val; | |
145 | break; | |
146 | } | |
147 | err = 0; | |
148 | unmap: | |
149 | iounmap(mmio); | |
150 | out: | |
151 | return err; | |
152 | } | |
153 | ||
154 | static int ssb_extpci_write_config(struct ssb_pcicore *pc, | |
155 | unsigned int bus, unsigned int dev, | |
156 | unsigned int func, unsigned int off, | |
157 | const void *buf, int len) | |
158 | { | |
159 | int err = -EINVAL; | |
160 | u32 addr, val = 0; | |
161 | void __iomem *mmio; | |
162 | ||
163 | SSB_WARN_ON(!pc->hostmode); | |
164 | if (unlikely(len != 1 && len != 2 && len != 4)) | |
165 | goto out; | |
166 | addr = get_cfgspace_addr(pc, bus, dev, func, off); | |
167 | if (unlikely(!addr)) | |
168 | goto out; | |
169 | err = -ENOMEM; | |
170 | mmio = ioremap_nocache(addr, len); | |
171 | if (!mmio) | |
172 | goto out; | |
173 | ||
174 | if (mips_busprobe32(val, mmio)) { | |
175 | val = 0xffffffff; | |
176 | goto unmap; | |
177 | } | |
178 | ||
179 | switch (len) { | |
180 | case 1: | |
181 | val = readl(mmio); | |
182 | val &= ~(0xFF << (8 * (off & 3))); | |
183 | val |= *((const u8 *)buf) << (8 * (off & 3)); | |
184 | break; | |
185 | case 2: | |
186 | val = readl(mmio); | |
187 | val &= ~(0xFFFF << (8 * (off & 3))); | |
188 | val |= *((const u16 *)buf) << (8 * (off & 3)); | |
189 | break; | |
190 | case 4: | |
191 | val = *((const u32 *)buf); | |
192 | break; | |
193 | } | |
194 | writel(val, mmio); | |
195 | ||
196 | err = 0; | |
197 | unmap: | |
198 | iounmap(mmio); | |
199 | out: | |
200 | return err; | |
201 | } | |
202 | ||
203 | static int ssb_pcicore_read_config(struct pci_bus *bus, unsigned int devfn, | |
204 | int reg, int size, u32 *val) | |
205 | { | |
206 | unsigned long flags; | |
207 | int err; | |
208 | ||
209 | spin_lock_irqsave(&cfgspace_lock, flags); | |
210 | err = ssb_extpci_read_config(extpci_core, bus->number, PCI_SLOT(devfn), | |
211 | PCI_FUNC(devfn), reg, val, size); | |
212 | spin_unlock_irqrestore(&cfgspace_lock, flags); | |
213 | ||
214 | return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; | |
215 | } | |
216 | ||
217 | static int ssb_pcicore_write_config(struct pci_bus *bus, unsigned int devfn, | |
218 | int reg, int size, u32 val) | |
219 | { | |
220 | unsigned long flags; | |
221 | int err; | |
222 | ||
223 | spin_lock_irqsave(&cfgspace_lock, flags); | |
224 | err = ssb_extpci_write_config(extpci_core, bus->number, PCI_SLOT(devfn), | |
225 | PCI_FUNC(devfn), reg, &val, size); | |
226 | spin_unlock_irqrestore(&cfgspace_lock, flags); | |
227 | ||
228 | return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; | |
229 | } | |
230 | ||
231 | static struct pci_ops ssb_pcicore_pciops = { | |
232 | .read = ssb_pcicore_read_config, | |
233 | .write = ssb_pcicore_write_config, | |
234 | }; | |
235 | ||
236 | static struct resource ssb_pcicore_mem_resource = { | |
237 | .name = "SSB PCIcore external memory", | |
238 | .start = SSB_PCI_DMA, | |
239 | .end = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1, | |
fc71acc8 | 240 | .flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED, |
61e115a5 MB |
241 | }; |
242 | ||
243 | static struct resource ssb_pcicore_io_resource = { | |
244 | .name = "SSB PCIcore external I/O", | |
245 | .start = 0x100, | |
246 | .end = 0x7FF, | |
fc71acc8 | 247 | .flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED, |
61e115a5 MB |
248 | }; |
249 | ||
250 | static struct pci_controller ssb_pcicore_controller = { | |
251 | .pci_ops = &ssb_pcicore_pciops, | |
252 | .io_resource = &ssb_pcicore_io_resource, | |
253 | .mem_resource = &ssb_pcicore_mem_resource, | |
61e115a5 MB |
254 | }; |
255 | ||
aab547ce MB |
256 | /* This function is called when doing a pci_enable_device(). |
257 | * We must first check if the device is a device on the PCI-core bridge. */ | |
258 | int ssb_pcicore_plat_dev_init(struct pci_dev *d) | |
259 | { | |
aab547ce MB |
260 | if (d->bus->ops != &ssb_pcicore_pciops) { |
261 | /* This is not a device on the PCI-core bridge. */ | |
262 | return -ENODEV; | |
263 | } | |
264 | ||
265 | ssb_printk(KERN_INFO "PCI: Fixing up device %s\n", | |
266 | pci_name(d)); | |
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 | ||
287 | ssb_printk(KERN_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_printk(KERN_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_printk(KERN_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 | ||
61e115a5 MB |
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_dprintk(KERN_INFO PFX "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 | ||
7cb44615 MB |
339 | if (pc->dev->bus->has_cardbus_slot) { |
340 | ssb_dprintk(KERN_INFO PFX "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 | } | |
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 | ||
382 | static int pcicore_is_in_hostmode(struct ssb_pcicore *pc) | |
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 | ||
415 | static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc) | |
416 | { | |
417 | return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80; | |
418 | } | |
419 | ||
420 | static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc) | |
421 | { | |
422 | const u8 serdes_pll_device = 0x1D; | |
423 | const u8 serdes_rx_device = 0x1F; | |
424 | u16 tmp; | |
425 | ||
426 | ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */, | |
427 | ssb_pcicore_polarity_workaround(pc)); | |
428 | tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */); | |
429 | if (tmp & 0x4000) | |
430 | ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000); | |
431 | } | |
61e115a5 MB |
432 | |
433 | /************************************************** | |
434 | * Generic and Clientmode operation code. | |
435 | **************************************************/ | |
436 | ||
437 | static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc) | |
438 | { | |
439 | /* Disable PCI interrupts. */ | |
440 | ssb_write32(pc->dev, SSB_INTVEC, 0); | |
441 | } | |
442 | ||
443 | void ssb_pcicore_init(struct ssb_pcicore *pc) | |
444 | { | |
445 | struct ssb_device *dev = pc->dev; | |
61e115a5 MB |
446 | |
447 | if (!dev) | |
448 | return; | |
61e115a5 MB |
449 | if (!ssb_device_is_enabled(dev)) |
450 | ssb_device_enable(dev, 0); | |
451 | ||
452 | #ifdef CONFIG_SSB_PCICORE_HOSTMODE | |
453 | pc->hostmode = pcicore_is_in_hostmode(pc); | |
454 | if (pc->hostmode) | |
455 | ssb_pcicore_init_hostmode(pc); | |
456 | #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ | |
457 | if (!pc->hostmode) | |
458 | ssb_pcicore_init_clientmode(pc); | |
ccc7c28a RM |
459 | |
460 | ssb_pcicore_serdes_workaround(pc); | |
61e115a5 MB |
461 | } |
462 | ||
463 | static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address) | |
464 | { | |
465 | pcicore_write32(pc, 0x130, address); | |
466 | return pcicore_read32(pc, 0x134); | |
467 | } | |
468 | ||
469 | static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data) | |
470 | { | |
471 | pcicore_write32(pc, 0x130, address); | |
472 | pcicore_write32(pc, 0x134, data); | |
473 | } | |
474 | ||
1b1c7acd RM |
475 | static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy) |
476 | { | |
477 | const u16 mdio_control = 0x128; | |
478 | const u16 mdio_data = 0x12C; | |
479 | u32 v; | |
480 | int i; | |
481 | ||
482 | v = (1 << 30); /* Start of Transaction */ | |
483 | v |= (1 << 28); /* Write Transaction */ | |
484 | v |= (1 << 17); /* Turnaround */ | |
485 | v |= (0x1F << 18); | |
486 | v |= (phy << 4); | |
487 | pcicore_write32(pc, mdio_data, v); | |
488 | ||
489 | udelay(10); | |
490 | for (i = 0; i < 200; i++) { | |
491 | v = pcicore_read32(pc, mdio_control); | |
492 | if (v & 0x100 /* Trans complete */) | |
493 | break; | |
494 | msleep(1); | |
495 | } | |
496 | } | |
497 | ||
ba91d1a1 RM |
498 | static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address) |
499 | { | |
500 | const u16 mdio_control = 0x128; | |
501 | const u16 mdio_data = 0x12C; | |
502 | int max_retries = 10; | |
503 | u16 ret = 0; | |
504 | u32 v; | |
505 | int i; | |
506 | ||
507 | v = 0x80; /* Enable Preamble Sequence */ | |
508 | v |= 0x2; /* MDIO Clock Divisor */ | |
509 | pcicore_write32(pc, mdio_control, v); | |
510 | ||
511 | if (pc->dev->id.revision >= 10) { | |
512 | max_retries = 200; | |
513 | ssb_pcie_mdio_set_phy(pc, device); | |
514 | } | |
515 | ||
516 | v = (1 << 30); /* Start of Transaction */ | |
517 | v |= (1 << 29); /* Read Transaction */ | |
518 | v |= (1 << 17); /* Turnaround */ | |
519 | if (pc->dev->id.revision < 10) | |
520 | v |= (u32)device << 22; | |
521 | v |= (u32)address << 18; | |
522 | pcicore_write32(pc, mdio_data, v); | |
523 | /* Wait for the device to complete the transaction */ | |
524 | udelay(10); | |
525 | for (i = 0; i < 200; i++) { | |
526 | v = pcicore_read32(pc, mdio_control); | |
527 | if (v & 0x100 /* Trans complete */) { | |
528 | udelay(10); | |
529 | ret = pcicore_read32(pc, mdio_data); | |
530 | break; | |
531 | } | |
532 | msleep(1); | |
533 | } | |
534 | pcicore_write32(pc, mdio_control, 0); | |
535 | return ret; | |
536 | } | |
ba91d1a1 | 537 | |
61e115a5 MB |
538 | static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device, |
539 | u8 address, u16 data) | |
540 | { | |
541 | const u16 mdio_control = 0x128; | |
542 | const u16 mdio_data = 0x12C; | |
1b1c7acd | 543 | int max_retries = 10; |
61e115a5 MB |
544 | u32 v; |
545 | int i; | |
546 | ||
547 | v = 0x80; /* Enable Preamble Sequence */ | |
548 | v |= 0x2; /* MDIO Clock Divisor */ | |
549 | pcicore_write32(pc, mdio_control, v); | |
550 | ||
1b1c7acd RM |
551 | if (pc->dev->id.revision >= 10) { |
552 | max_retries = 200; | |
553 | ssb_pcie_mdio_set_phy(pc, device); | |
554 | } | |
555 | ||
61e115a5 MB |
556 | v = (1 << 30); /* Start of Transaction */ |
557 | v |= (1 << 28); /* Write Transaction */ | |
558 | v |= (1 << 17); /* Turnaround */ | |
1b1c7acd RM |
559 | if (pc->dev->id.revision < 10) |
560 | v |= (u32)device << 22; | |
61e115a5 MB |
561 | v |= (u32)address << 18; |
562 | v |= data; | |
563 | pcicore_write32(pc, mdio_data, v); | |
564 | /* Wait for the device to complete the transaction */ | |
565 | udelay(10); | |
1b1c7acd | 566 | for (i = 0; i < max_retries; i++) { |
61e115a5 MB |
567 | v = pcicore_read32(pc, mdio_control); |
568 | if (v & 0x100 /* Trans complete */) | |
569 | break; | |
570 | msleep(1); | |
571 | } | |
572 | pcicore_write32(pc, mdio_control, 0); | |
573 | } | |
574 | ||
575 | static void ssb_broadcast_value(struct ssb_device *dev, | |
576 | u32 address, u32 data) | |
577 | { | |
578 | /* This is used for both, PCI and ChipCommon core, so be careful. */ | |
579 | BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR); | |
580 | BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA); | |
581 | ||
582 | ssb_write32(dev, SSB_PCICORE_BCAST_ADDR, address); | |
583 | ssb_read32(dev, SSB_PCICORE_BCAST_ADDR); /* flush */ | |
584 | ssb_write32(dev, SSB_PCICORE_BCAST_DATA, data); | |
585 | ssb_read32(dev, SSB_PCICORE_BCAST_DATA); /* flush */ | |
586 | } | |
587 | ||
588 | static void ssb_commit_settings(struct ssb_bus *bus) | |
589 | { | |
590 | struct ssb_device *dev; | |
591 | ||
592 | dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev; | |
593 | if (WARN_ON(!dev)) | |
594 | return; | |
595 | /* This forces an update of the cached registers. */ | |
596 | ssb_broadcast_value(dev, 0xFD8, 0); | |
597 | } | |
598 | ||
599 | int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc, | |
600 | struct ssb_device *dev) | |
601 | { | |
602 | struct ssb_device *pdev = pc->dev; | |
603 | struct ssb_bus *bus; | |
604 | int err = 0; | |
605 | u32 tmp; | |
606 | ||
9e095a68 MB |
607 | if (dev->bus->bustype != SSB_BUSTYPE_PCI) { |
608 | /* This SSB device is not on a PCI host-bus. So the IRQs are | |
609 | * not routed through the PCI core. | |
610 | * So we must not enable routing through the PCI core. */ | |
611 | goto out; | |
612 | } | |
613 | ||
61e115a5 MB |
614 | if (!pdev) |
615 | goto out; | |
616 | bus = pdev->bus; | |
617 | ||
a3bafeed MB |
618 | might_sleep_if(pdev->id.coreid != SSB_DEV_PCI); |
619 | ||
61e115a5 | 620 | /* Enable interrupts for this device. */ |
8b45499c | 621 | if ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE)) { |
61e115a5 MB |
622 | u32 coremask; |
623 | ||
624 | /* Calculate the "coremask" for the device. */ | |
625 | coremask = (1 << dev->core_index); | |
626 | ||
8b45499c | 627 | SSB_WARN_ON(bus->bustype != SSB_BUSTYPE_PCI); |
61e115a5 MB |
628 | err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp); |
629 | if (err) | |
630 | goto out; | |
631 | tmp |= coremask << 8; | |
632 | err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp); | |
633 | if (err) | |
634 | goto out; | |
635 | } else { | |
636 | u32 intvec; | |
637 | ||
638 | intvec = ssb_read32(pdev, SSB_INTVEC); | |
51e8b885 MB |
639 | tmp = ssb_read32(dev, SSB_TPSFLAG); |
640 | tmp &= SSB_TPSFLAG_BPFLAG; | |
641 | intvec |= (1 << tmp); | |
61e115a5 MB |
642 | ssb_write32(pdev, SSB_INTVEC, intvec); |
643 | } | |
644 | ||
645 | /* Setup PCIcore operation. */ | |
646 | if (pc->setup_done) | |
647 | goto out; | |
648 | if (pdev->id.coreid == SSB_DEV_PCI) { | |
649 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); | |
650 | tmp |= SSB_PCICORE_SBTOPCI_PREF; | |
651 | tmp |= SSB_PCICORE_SBTOPCI_BURST; | |
652 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); | |
653 | ||
654 | if (pdev->id.revision < 5) { | |
655 | tmp = ssb_read32(pdev, SSB_IMCFGLO); | |
656 | tmp &= ~SSB_IMCFGLO_SERTO; | |
657 | tmp |= 2; | |
658 | tmp &= ~SSB_IMCFGLO_REQTO; | |
659 | tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT; | |
660 | ssb_write32(pdev, SSB_IMCFGLO, tmp); | |
661 | ssb_commit_settings(bus); | |
662 | } else if (pdev->id.revision >= 11) { | |
663 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); | |
664 | tmp |= SSB_PCICORE_SBTOPCI_MRM; | |
665 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); | |
666 | } | |
667 | } else { | |
668 | WARN_ON(pdev->id.coreid != SSB_DEV_PCIE); | |
669 | //TODO: Better make defines for all these magic PCIE values. | |
670 | if ((pdev->id.revision == 0) || (pdev->id.revision == 1)) { | |
671 | /* TLP Workaround register. */ | |
672 | tmp = ssb_pcie_read(pc, 0x4); | |
673 | tmp |= 0x8; | |
674 | ssb_pcie_write(pc, 0x4, tmp); | |
675 | } | |
676 | if (pdev->id.revision == 0) { | |
677 | const u8 serdes_rx_device = 0x1F; | |
678 | ||
679 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
680 | 2 /* Timer */, 0x8128); | |
681 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
682 | 6 /* CDR */, 0x0100); | |
683 | ssb_pcie_mdio_write(pc, serdes_rx_device, | |
684 | 7 /* CDR BW */, 0x1466); | |
685 | } else if (pdev->id.revision == 1) { | |
686 | /* DLLP Link Control register. */ | |
687 | tmp = ssb_pcie_read(pc, 0x100); | |
688 | tmp |= 0x40; | |
689 | ssb_pcie_write(pc, 0x100, tmp); | |
690 | } | |
691 | } | |
692 | pc->setup_done = 1; | |
693 | out: | |
694 | return err; | |
695 | } | |
696 | EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable); |