Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 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> |
Michael Buesch | 7cb4461 | 2008-02-19 17:46:48 +0100 | [diff] [blame] | 14 | #include <linux/ssb/ssb_embedded.h> |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 15 | |
| 16 | #include "ssb_private.h" |
| 17 | |
| 18 | |
| 19 | static inline |
| 20 | u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset) |
| 21 | { |
| 22 | return ssb_read32(pc->dev, offset); |
| 23 | } |
| 24 | |
| 25 | static inline |
| 26 | void pcicore_write32(struct ssb_pcicore *pc, u16 offset, u32 value) |
| 27 | { |
| 28 | ssb_write32(pc->dev, offset, value); |
| 29 | } |
| 30 | |
Michael Buesch | 7cb4461 | 2008-02-19 17:46:48 +0100 | [diff] [blame] | 31 | static inline |
| 32 | u16 pcicore_read16(struct ssb_pcicore *pc, u16 offset) |
| 33 | { |
| 34 | return ssb_read16(pc->dev, offset); |
| 35 | } |
| 36 | |
| 37 | static inline |
| 38 | void pcicore_write16(struct ssb_pcicore *pc, u16 offset, u16 value) |
| 39 | { |
| 40 | ssb_write16(pc->dev, offset, value); |
| 41 | } |
| 42 | |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 43 | /************************************************** |
| 44 | * Code for hostmode operation. |
| 45 | **************************************************/ |
| 46 | |
| 47 | #ifdef CONFIG_SSB_PCICORE_HOSTMODE |
| 48 | |
| 49 | #include <asm/paccess.h> |
| 50 | /* Probe a 32bit value on the bus and catch bus exceptions. |
| 51 | * Returns nonzero on a bus exception. |
| 52 | * This is MIPS specific */ |
| 53 | #define mips_busprobe32(val, addr) get_dbe((val), ((u32 *)(addr))) |
| 54 | |
| 55 | /* Assume one-hot slot wiring */ |
| 56 | #define SSB_PCI_SLOT_MAX 16 |
| 57 | |
| 58 | /* Global lock is OK, as we won't have more than one extpci anyway. */ |
| 59 | static DEFINE_SPINLOCK(cfgspace_lock); |
| 60 | /* Core to access the external PCI config space. Can only have one. */ |
| 61 | static struct ssb_pcicore *extpci_core; |
| 62 | |
| 63 | static u32 ssb_pcicore_pcibus_iobase = 0x100; |
| 64 | static u32 ssb_pcicore_pcibus_membase = SSB_PCI_DMA; |
| 65 | |
| 66 | int pcibios_plat_dev_init(struct pci_dev *d) |
| 67 | { |
| 68 | struct resource *res; |
| 69 | int pos, size; |
| 70 | u32 *base; |
| 71 | |
| 72 | ssb_printk(KERN_INFO "PCI: Fixing up device %s\n", |
| 73 | pci_name(d)); |
| 74 | |
| 75 | /* Fix up resource bases */ |
| 76 | for (pos = 0; pos < 6; pos++) { |
| 77 | res = &d->resource[pos]; |
| 78 | if (res->flags & IORESOURCE_IO) |
| 79 | base = &ssb_pcicore_pcibus_iobase; |
| 80 | else |
| 81 | base = &ssb_pcicore_pcibus_membase; |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 82 | res->flags |= IORESOURCE_PCI_FIXED; |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 83 | if (res->end) { |
| 84 | size = res->end - res->start + 1; |
| 85 | if (*base & (size - 1)) |
| 86 | *base = (*base + size) & ~(size - 1); |
| 87 | res->start = *base; |
| 88 | res->end = res->start + size - 1; |
| 89 | *base += size; |
| 90 | pci_write_config_dword(d, PCI_BASE_ADDRESS_0 + (pos << 2), res->start); |
| 91 | } |
| 92 | /* Fix up PCI bridge BAR0 only */ |
| 93 | if (d->bus->number == 0 && PCI_SLOT(d->devfn) == 0) |
| 94 | break; |
| 95 | } |
| 96 | /* Fix up interrupt lines */ |
| 97 | d->irq = ssb_mips_irq(extpci_core->dev) + 2; |
| 98 | pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq); |
| 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static void __init ssb_fixup_pcibridge(struct pci_dev *dev) |
| 104 | { |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 105 | u8 lat; |
| 106 | |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 107 | if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) != 0) |
| 108 | return; |
| 109 | |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 110 | ssb_printk(KERN_INFO "PCI: Fixing up bridge %s\n", pci_name(dev)); |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 111 | |
| 112 | /* Enable PCI bridge bus mastering and memory space */ |
| 113 | pci_set_master(dev); |
| 114 | pcibios_enable_device(dev, ~0); |
| 115 | |
| 116 | /* Enable PCI bridge BAR1 prefetch and burst */ |
| 117 | pci_write_config_dword(dev, SSB_BAR1_CONTROL, 3); |
| 118 | |
| 119 | /* Make sure our latency is high enough to handle the devices behind us */ |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 120 | lat = 168; |
| 121 | ssb_printk(KERN_INFO "PCI: Fixing latency timer of device %s to %u\n", |
| 122 | pci_name(dev), lat); |
| 123 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat); |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 124 | } |
| 125 | DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_fixup_pcibridge); |
| 126 | |
| 127 | int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 128 | { |
| 129 | return ssb_mips_irq(extpci_core->dev) + 2; |
| 130 | } |
| 131 | |
| 132 | static u32 get_cfgspace_addr(struct ssb_pcicore *pc, |
| 133 | unsigned int bus, unsigned int dev, |
| 134 | unsigned int func, unsigned int off) |
| 135 | { |
| 136 | u32 addr = 0; |
| 137 | u32 tmp; |
| 138 | |
Michael Buesch | 7cb4461 | 2008-02-19 17:46:48 +0100 | [diff] [blame] | 139 | /* We do only have one cardbus device behind the bridge. */ |
| 140 | if (pc->cardbusmode && (dev >= 1)) |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 141 | goto out; |
Michael Buesch | 7cb4461 | 2008-02-19 17:46:48 +0100 | [diff] [blame] | 142 | |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 143 | if (bus == 0) { |
| 144 | /* Type 0 transaction */ |
| 145 | if (unlikely(dev >= SSB_PCI_SLOT_MAX)) |
| 146 | goto out; |
| 147 | /* Slide the window */ |
| 148 | tmp = SSB_PCICORE_SBTOPCI_CFG0; |
| 149 | tmp |= ((1 << (dev + 16)) & SSB_PCICORE_SBTOPCI1_MASK); |
| 150 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, tmp); |
| 151 | /* Calculate the address */ |
| 152 | addr = SSB_PCI_CFG; |
| 153 | addr |= ((1 << (dev + 16)) & ~SSB_PCICORE_SBTOPCI1_MASK); |
| 154 | addr |= (func << 8); |
| 155 | addr |= (off & ~3); |
| 156 | } else { |
| 157 | /* Type 1 transaction */ |
| 158 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, |
| 159 | SSB_PCICORE_SBTOPCI_CFG1); |
| 160 | /* Calculate the address */ |
| 161 | addr = SSB_PCI_CFG; |
| 162 | addr |= (bus << 16); |
| 163 | addr |= (dev << 11); |
| 164 | addr |= (func << 8); |
| 165 | addr |= (off & ~3); |
| 166 | } |
| 167 | out: |
| 168 | return addr; |
| 169 | } |
| 170 | |
| 171 | static int ssb_extpci_read_config(struct ssb_pcicore *pc, |
| 172 | unsigned int bus, unsigned int dev, |
| 173 | unsigned int func, unsigned int off, |
| 174 | void *buf, int len) |
| 175 | { |
| 176 | int err = -EINVAL; |
| 177 | u32 addr, val; |
| 178 | void __iomem *mmio; |
| 179 | |
| 180 | SSB_WARN_ON(!pc->hostmode); |
| 181 | if (unlikely(len != 1 && len != 2 && len != 4)) |
| 182 | goto out; |
| 183 | addr = get_cfgspace_addr(pc, bus, dev, func, off); |
| 184 | if (unlikely(!addr)) |
| 185 | goto out; |
| 186 | err = -ENOMEM; |
| 187 | mmio = ioremap_nocache(addr, len); |
| 188 | if (!mmio) |
| 189 | goto out; |
| 190 | |
| 191 | if (mips_busprobe32(val, mmio)) { |
| 192 | val = 0xffffffff; |
| 193 | goto unmap; |
| 194 | } |
| 195 | |
| 196 | val = readl(mmio); |
| 197 | val >>= (8 * (off & 3)); |
| 198 | |
| 199 | switch (len) { |
| 200 | case 1: |
| 201 | *((u8 *)buf) = (u8)val; |
| 202 | break; |
| 203 | case 2: |
| 204 | *((u16 *)buf) = (u16)val; |
| 205 | break; |
| 206 | case 4: |
| 207 | *((u32 *)buf) = (u32)val; |
| 208 | break; |
| 209 | } |
| 210 | err = 0; |
| 211 | unmap: |
| 212 | iounmap(mmio); |
| 213 | out: |
| 214 | return err; |
| 215 | } |
| 216 | |
| 217 | static int ssb_extpci_write_config(struct ssb_pcicore *pc, |
| 218 | unsigned int bus, unsigned int dev, |
| 219 | unsigned int func, unsigned int off, |
| 220 | const void *buf, int len) |
| 221 | { |
| 222 | int err = -EINVAL; |
| 223 | u32 addr, val = 0; |
| 224 | void __iomem *mmio; |
| 225 | |
| 226 | SSB_WARN_ON(!pc->hostmode); |
| 227 | if (unlikely(len != 1 && len != 2 && len != 4)) |
| 228 | goto out; |
| 229 | addr = get_cfgspace_addr(pc, bus, dev, func, off); |
| 230 | if (unlikely(!addr)) |
| 231 | goto out; |
| 232 | err = -ENOMEM; |
| 233 | mmio = ioremap_nocache(addr, len); |
| 234 | if (!mmio) |
| 235 | goto out; |
| 236 | |
| 237 | if (mips_busprobe32(val, mmio)) { |
| 238 | val = 0xffffffff; |
| 239 | goto unmap; |
| 240 | } |
| 241 | |
| 242 | switch (len) { |
| 243 | case 1: |
| 244 | val = readl(mmio); |
| 245 | val &= ~(0xFF << (8 * (off & 3))); |
| 246 | val |= *((const u8 *)buf) << (8 * (off & 3)); |
| 247 | break; |
| 248 | case 2: |
| 249 | val = readl(mmio); |
| 250 | val &= ~(0xFFFF << (8 * (off & 3))); |
| 251 | val |= *((const u16 *)buf) << (8 * (off & 3)); |
| 252 | break; |
| 253 | case 4: |
| 254 | val = *((const u32 *)buf); |
| 255 | break; |
| 256 | } |
| 257 | writel(val, mmio); |
| 258 | |
| 259 | err = 0; |
| 260 | unmap: |
| 261 | iounmap(mmio); |
| 262 | out: |
| 263 | return err; |
| 264 | } |
| 265 | |
| 266 | static int ssb_pcicore_read_config(struct pci_bus *bus, unsigned int devfn, |
| 267 | int reg, int size, u32 *val) |
| 268 | { |
| 269 | unsigned long flags; |
| 270 | int err; |
| 271 | |
| 272 | spin_lock_irqsave(&cfgspace_lock, flags); |
| 273 | err = ssb_extpci_read_config(extpci_core, bus->number, PCI_SLOT(devfn), |
| 274 | PCI_FUNC(devfn), reg, val, size); |
| 275 | spin_unlock_irqrestore(&cfgspace_lock, flags); |
| 276 | |
| 277 | return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
| 278 | } |
| 279 | |
| 280 | static int ssb_pcicore_write_config(struct pci_bus *bus, unsigned int devfn, |
| 281 | int reg, int size, u32 val) |
| 282 | { |
| 283 | unsigned long flags; |
| 284 | int err; |
| 285 | |
| 286 | spin_lock_irqsave(&cfgspace_lock, flags); |
| 287 | err = ssb_extpci_write_config(extpci_core, bus->number, PCI_SLOT(devfn), |
| 288 | PCI_FUNC(devfn), reg, &val, size); |
| 289 | spin_unlock_irqrestore(&cfgspace_lock, flags); |
| 290 | |
| 291 | return err ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
| 292 | } |
| 293 | |
| 294 | static struct pci_ops ssb_pcicore_pciops = { |
| 295 | .read = ssb_pcicore_read_config, |
| 296 | .write = ssb_pcicore_write_config, |
| 297 | }; |
| 298 | |
| 299 | static struct resource ssb_pcicore_mem_resource = { |
| 300 | .name = "SSB PCIcore external memory", |
| 301 | .start = SSB_PCI_DMA, |
| 302 | .end = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1, |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 303 | .flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED, |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 304 | }; |
| 305 | |
| 306 | static struct resource ssb_pcicore_io_resource = { |
| 307 | .name = "SSB PCIcore external I/O", |
| 308 | .start = 0x100, |
| 309 | .end = 0x7FF, |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 310 | .flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED, |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 311 | }; |
| 312 | |
| 313 | static struct pci_controller ssb_pcicore_controller = { |
| 314 | .pci_ops = &ssb_pcicore_pciops, |
| 315 | .io_resource = &ssb_pcicore_io_resource, |
| 316 | .mem_resource = &ssb_pcicore_mem_resource, |
| 317 | .mem_offset = 0x24000000, |
| 318 | }; |
| 319 | |
| 320 | static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc) |
| 321 | { |
| 322 | u32 val; |
| 323 | |
| 324 | if (WARN_ON(extpci_core)) |
| 325 | return; |
| 326 | extpci_core = pc; |
| 327 | |
| 328 | ssb_dprintk(KERN_INFO PFX "PCIcore in host mode found\n"); |
| 329 | /* Reset devices on the external PCI bus */ |
| 330 | val = SSB_PCICORE_CTL_RST_OE; |
| 331 | val |= SSB_PCICORE_CTL_CLK_OE; |
| 332 | pcicore_write32(pc, SSB_PCICORE_CTL, val); |
| 333 | val |= SSB_PCICORE_CTL_CLK; /* Clock on */ |
| 334 | pcicore_write32(pc, SSB_PCICORE_CTL, val); |
| 335 | udelay(150); /* Assertion time demanded by the PCI standard */ |
| 336 | val |= SSB_PCICORE_CTL_RST; /* Deassert RST# */ |
| 337 | pcicore_write32(pc, SSB_PCICORE_CTL, val); |
| 338 | val = SSB_PCICORE_ARBCTL_INTERN; |
| 339 | pcicore_write32(pc, SSB_PCICORE_ARBCTL, val); |
| 340 | udelay(1); /* Assertion time demanded by the PCI standard */ |
| 341 | |
Michael Buesch | 7cb4461 | 2008-02-19 17:46:48 +0100 | [diff] [blame] | 342 | if (pc->dev->bus->has_cardbus_slot) { |
| 343 | ssb_dprintk(KERN_INFO PFX "CardBus slot detected\n"); |
| 344 | pc->cardbusmode = 1; |
| 345 | /* GPIO 1 resets the bridge */ |
| 346 | ssb_gpio_out(pc->dev->bus, 1, 1); |
| 347 | ssb_gpio_outen(pc->dev->bus, 1, 1); |
| 348 | pcicore_write16(pc, SSB_PCICORE_SPROM(0), |
| 349 | pcicore_read16(pc, SSB_PCICORE_SPROM(0)) |
| 350 | | 0x0400); |
| 351 | } |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 352 | |
| 353 | /* 64MB I/O window */ |
| 354 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI0, |
| 355 | SSB_PCICORE_SBTOPCI_IO); |
| 356 | /* 64MB config space */ |
| 357 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI1, |
| 358 | SSB_PCICORE_SBTOPCI_CFG0); |
| 359 | /* 1GB memory window */ |
| 360 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, |
| 361 | SSB_PCICORE_SBTOPCI_MEM | SSB_PCI_DMA); |
| 362 | |
| 363 | /* Enable PCI bridge BAR0 prefetch and burst */ |
| 364 | val = PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY; |
| 365 | ssb_extpci_write_config(pc, 0, 0, 0, PCI_COMMAND, &val, 2); |
| 366 | /* Clear error conditions */ |
| 367 | val = 0; |
| 368 | ssb_extpci_write_config(pc, 0, 0, 0, PCI_STATUS, &val, 2); |
| 369 | |
| 370 | /* Enable PCI interrupts */ |
| 371 | pcicore_write32(pc, SSB_PCICORE_IMASK, |
| 372 | SSB_PCICORE_IMASK_INTA); |
| 373 | |
| 374 | /* Ok, ready to run, register it to the system. |
| 375 | * The following needs change, if we want to port hostmode |
| 376 | * to non-MIPS platform. */ |
Michael Buesch | fc71acc | 2008-02-16 18:13:36 +0100 | [diff] [blame] | 377 | ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000); |
| 378 | set_io_port_base(ssb_pcicore_controller.io_map_base); |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 379 | /* Give some time to the PCI controller to configure itself with the new |
| 380 | * values. Not waiting at this point causes crashes of the machine. */ |
| 381 | mdelay(10); |
| 382 | register_pci_controller(&ssb_pcicore_controller); |
| 383 | } |
| 384 | |
| 385 | static int pcicore_is_in_hostmode(struct ssb_pcicore *pc) |
| 386 | { |
| 387 | struct ssb_bus *bus = pc->dev->bus; |
| 388 | u16 chipid_top; |
| 389 | u32 tmp; |
| 390 | |
| 391 | chipid_top = (bus->chip_id & 0xFF00); |
| 392 | if (chipid_top != 0x4700 && |
| 393 | chipid_top != 0x5300) |
| 394 | return 0; |
| 395 | |
Aurelien Jarno | 2d8d4fd | 2008-02-28 15:11:26 +0100 | [diff] [blame] | 396 | if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI) |
Michael Buesch | 61e115a | 2007-09-18 15:12:50 -0400 | [diff] [blame] | 397 | return 0; |
| 398 | |
| 399 | /* The 200-pin BCM4712 package does not bond out PCI. Even when |
| 400 | * PCI is bonded out, some boards may leave the pins floating. */ |
| 401 | if (bus->chip_id == 0x4712) { |
| 402 | if (bus->chip_package == SSB_CHIPPACK_BCM4712S) |
| 403 | return 0; |
| 404 | if (bus->chip_package == SSB_CHIPPACK_BCM4712M) |
| 405 | return 0; |
| 406 | } |
| 407 | if (bus->chip_id == 0x5350) |
| 408 | return 0; |
| 409 | |
| 410 | return !mips_busprobe32(tmp, (bus->mmio + (pc->dev->core_index * SSB_CORE_SIZE))); |
| 411 | } |
| 412 | #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ |
| 413 | |
| 414 | |
| 415 | /************************************************** |
| 416 | * Generic and Clientmode operation code. |
| 417 | **************************************************/ |
| 418 | |
| 419 | static void ssb_pcicore_init_clientmode(struct ssb_pcicore *pc) |
| 420 | { |
| 421 | /* Disable PCI interrupts. */ |
| 422 | ssb_write32(pc->dev, SSB_INTVEC, 0); |
| 423 | } |
| 424 | |
| 425 | void ssb_pcicore_init(struct ssb_pcicore *pc) |
| 426 | { |
| 427 | struct ssb_device *dev = pc->dev; |
| 428 | struct ssb_bus *bus; |
| 429 | |
| 430 | if (!dev) |
| 431 | return; |
| 432 | bus = dev->bus; |
| 433 | if (!ssb_device_is_enabled(dev)) |
| 434 | ssb_device_enable(dev, 0); |
| 435 | |
| 436 | #ifdef CONFIG_SSB_PCICORE_HOSTMODE |
| 437 | pc->hostmode = pcicore_is_in_hostmode(pc); |
| 438 | if (pc->hostmode) |
| 439 | ssb_pcicore_init_hostmode(pc); |
| 440 | #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ |
| 441 | if (!pc->hostmode) |
| 442 | ssb_pcicore_init_clientmode(pc); |
| 443 | } |
| 444 | |
| 445 | static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address) |
| 446 | { |
| 447 | pcicore_write32(pc, 0x130, address); |
| 448 | return pcicore_read32(pc, 0x134); |
| 449 | } |
| 450 | |
| 451 | static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data) |
| 452 | { |
| 453 | pcicore_write32(pc, 0x130, address); |
| 454 | pcicore_write32(pc, 0x134, data); |
| 455 | } |
| 456 | |
| 457 | static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device, |
| 458 | u8 address, u16 data) |
| 459 | { |
| 460 | const u16 mdio_control = 0x128; |
| 461 | const u16 mdio_data = 0x12C; |
| 462 | u32 v; |
| 463 | int i; |
| 464 | |
| 465 | v = 0x80; /* Enable Preamble Sequence */ |
| 466 | v |= 0x2; /* MDIO Clock Divisor */ |
| 467 | pcicore_write32(pc, mdio_control, v); |
| 468 | |
| 469 | v = (1 << 30); /* Start of Transaction */ |
| 470 | v |= (1 << 28); /* Write Transaction */ |
| 471 | v |= (1 << 17); /* Turnaround */ |
| 472 | v |= (u32)device << 22; |
| 473 | v |= (u32)address << 18; |
| 474 | v |= data; |
| 475 | pcicore_write32(pc, mdio_data, v); |
| 476 | /* Wait for the device to complete the transaction */ |
| 477 | udelay(10); |
| 478 | for (i = 0; i < 10; i++) { |
| 479 | v = pcicore_read32(pc, mdio_control); |
| 480 | if (v & 0x100 /* Trans complete */) |
| 481 | break; |
| 482 | msleep(1); |
| 483 | } |
| 484 | pcicore_write32(pc, mdio_control, 0); |
| 485 | } |
| 486 | |
| 487 | static void ssb_broadcast_value(struct ssb_device *dev, |
| 488 | u32 address, u32 data) |
| 489 | { |
| 490 | /* This is used for both, PCI and ChipCommon core, so be careful. */ |
| 491 | BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR); |
| 492 | BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA); |
| 493 | |
| 494 | ssb_write32(dev, SSB_PCICORE_BCAST_ADDR, address); |
| 495 | ssb_read32(dev, SSB_PCICORE_BCAST_ADDR); /* flush */ |
| 496 | ssb_write32(dev, SSB_PCICORE_BCAST_DATA, data); |
| 497 | ssb_read32(dev, SSB_PCICORE_BCAST_DATA); /* flush */ |
| 498 | } |
| 499 | |
| 500 | static void ssb_commit_settings(struct ssb_bus *bus) |
| 501 | { |
| 502 | struct ssb_device *dev; |
| 503 | |
| 504 | dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev; |
| 505 | if (WARN_ON(!dev)) |
| 506 | return; |
| 507 | /* This forces an update of the cached registers. */ |
| 508 | ssb_broadcast_value(dev, 0xFD8, 0); |
| 509 | } |
| 510 | |
| 511 | int ssb_pcicore_dev_irqvecs_enable(struct ssb_pcicore *pc, |
| 512 | struct ssb_device *dev) |
| 513 | { |
| 514 | struct ssb_device *pdev = pc->dev; |
| 515 | struct ssb_bus *bus; |
| 516 | int err = 0; |
| 517 | u32 tmp; |
| 518 | |
| 519 | might_sleep(); |
| 520 | |
| 521 | if (!pdev) |
| 522 | goto out; |
| 523 | bus = pdev->bus; |
| 524 | |
| 525 | /* Enable interrupts for this device. */ |
| 526 | if (bus->host_pci && |
| 527 | ((pdev->id.revision >= 6) || (pdev->id.coreid == SSB_DEV_PCIE))) { |
| 528 | u32 coremask; |
| 529 | |
| 530 | /* Calculate the "coremask" for the device. */ |
| 531 | coremask = (1 << dev->core_index); |
| 532 | |
| 533 | err = pci_read_config_dword(bus->host_pci, SSB_PCI_IRQMASK, &tmp); |
| 534 | if (err) |
| 535 | goto out; |
| 536 | tmp |= coremask << 8; |
| 537 | err = pci_write_config_dword(bus->host_pci, SSB_PCI_IRQMASK, tmp); |
| 538 | if (err) |
| 539 | goto out; |
| 540 | } else { |
| 541 | u32 intvec; |
| 542 | |
| 543 | intvec = ssb_read32(pdev, SSB_INTVEC); |
| 544 | if ((bus->chip_id & 0xFF00) == 0x4400) { |
| 545 | /* Workaround: On the BCM44XX the BPFLAG routing |
| 546 | * bit is wrong. Use a hardcoded constant. */ |
| 547 | intvec |= 0x00000002; |
| 548 | } else { |
| 549 | tmp = ssb_read32(dev, SSB_TPSFLAG); |
| 550 | tmp &= SSB_TPSFLAG_BPFLAG; |
| 551 | intvec |= tmp; |
| 552 | } |
| 553 | ssb_write32(pdev, SSB_INTVEC, intvec); |
| 554 | } |
| 555 | |
| 556 | /* Setup PCIcore operation. */ |
| 557 | if (pc->setup_done) |
| 558 | goto out; |
| 559 | if (pdev->id.coreid == SSB_DEV_PCI) { |
| 560 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); |
| 561 | tmp |= SSB_PCICORE_SBTOPCI_PREF; |
| 562 | tmp |= SSB_PCICORE_SBTOPCI_BURST; |
| 563 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); |
| 564 | |
| 565 | if (pdev->id.revision < 5) { |
| 566 | tmp = ssb_read32(pdev, SSB_IMCFGLO); |
| 567 | tmp &= ~SSB_IMCFGLO_SERTO; |
| 568 | tmp |= 2; |
| 569 | tmp &= ~SSB_IMCFGLO_REQTO; |
| 570 | tmp |= 3 << SSB_IMCFGLO_REQTO_SHIFT; |
| 571 | ssb_write32(pdev, SSB_IMCFGLO, tmp); |
| 572 | ssb_commit_settings(bus); |
| 573 | } else if (pdev->id.revision >= 11) { |
| 574 | tmp = pcicore_read32(pc, SSB_PCICORE_SBTOPCI2); |
| 575 | tmp |= SSB_PCICORE_SBTOPCI_MRM; |
| 576 | pcicore_write32(pc, SSB_PCICORE_SBTOPCI2, tmp); |
| 577 | } |
| 578 | } else { |
| 579 | WARN_ON(pdev->id.coreid != SSB_DEV_PCIE); |
| 580 | //TODO: Better make defines for all these magic PCIE values. |
| 581 | if ((pdev->id.revision == 0) || (pdev->id.revision == 1)) { |
| 582 | /* TLP Workaround register. */ |
| 583 | tmp = ssb_pcie_read(pc, 0x4); |
| 584 | tmp |= 0x8; |
| 585 | ssb_pcie_write(pc, 0x4, tmp); |
| 586 | } |
| 587 | if (pdev->id.revision == 0) { |
| 588 | const u8 serdes_rx_device = 0x1F; |
| 589 | |
| 590 | ssb_pcie_mdio_write(pc, serdes_rx_device, |
| 591 | 2 /* Timer */, 0x8128); |
| 592 | ssb_pcie_mdio_write(pc, serdes_rx_device, |
| 593 | 6 /* CDR */, 0x0100); |
| 594 | ssb_pcie_mdio_write(pc, serdes_rx_device, |
| 595 | 7 /* CDR BW */, 0x1466); |
| 596 | } else if (pdev->id.revision == 1) { |
| 597 | /* DLLP Link Control register. */ |
| 598 | tmp = ssb_pcie_read(pc, 0x100); |
| 599 | tmp |= 0x40; |
| 600 | ssb_pcie_write(pc, 0x100, tmp); |
| 601 | } |
| 602 | } |
| 603 | pc->setup_done = 1; |
| 604 | out: |
| 605 | return err; |
| 606 | } |
| 607 | EXPORT_SYMBOL(ssb_pcicore_dev_irqvecs_enable); |