1 /* 2 * Broadcom specific AMBA 3 * PCI Host 4 * 5 * Licensed under the GNU/GPL. See COPYING for details. 6 */ 7 8 #include "bcma_private.h" 9 #include <linux/slab.h> 10 #include <linux/bcma/bcma.h> 11 #include <linux/pci.h> 12 #include <linux/module.h> 13 14 static void bcma_host_pci_switch_core(struct bcma_device *core) 15 { 16 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN, 17 core->addr); 18 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2, 19 core->wrap); 20 core->bus->mapped_core = core; 21 bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id); 22 } 23 24 /* Provides access to the requested core. Returns base offset that has to be 25 * used. It makes use of fixed windows when possible. */ 26 static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core) 27 { 28 switch (core->id.id) { 29 case BCMA_CORE_CHIPCOMMON: 30 return 3 * BCMA_CORE_SIZE; 31 case BCMA_CORE_PCIE: 32 return 2 * BCMA_CORE_SIZE; 33 } 34 35 if (core->bus->mapped_core != core) 36 bcma_host_pci_switch_core(core); 37 return 0; 38 } 39 40 static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset) 41 { 42 offset += bcma_host_pci_provide_access_to_core(core); 43 return ioread8(core->bus->mmio + offset); 44 } 45 46 static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset) 47 { 48 offset += bcma_host_pci_provide_access_to_core(core); 49 return ioread16(core->bus->mmio + offset); 50 } 51 52 static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset) 53 { 54 offset += bcma_host_pci_provide_access_to_core(core); 55 return ioread32(core->bus->mmio + offset); 56 } 57 58 static void bcma_host_pci_write8(struct bcma_device *core, u16 offset, 59 u8 value) 60 { 61 offset += bcma_host_pci_provide_access_to_core(core); 62 iowrite8(value, core->bus->mmio + offset); 63 } 64 65 static void bcma_host_pci_write16(struct bcma_device *core, u16 offset, 66 u16 value) 67 { 68 offset += bcma_host_pci_provide_access_to_core(core); 69 iowrite16(value, core->bus->mmio + offset); 70 } 71 72 static void bcma_host_pci_write32(struct bcma_device *core, u16 offset, 73 u32 value) 74 { 75 offset += bcma_host_pci_provide_access_to_core(core); 76 iowrite32(value, core->bus->mmio + offset); 77 } 78 79 #ifdef CONFIG_BCMA_BLOCKIO 80 static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer, 81 size_t count, u16 offset, u8 reg_width) 82 { 83 void __iomem *addr = core->bus->mmio + offset; 84 if (core->bus->mapped_core != core) 85 bcma_host_pci_switch_core(core); 86 switch (reg_width) { 87 case sizeof(u8): 88 ioread8_rep(addr, buffer, count); 89 break; 90 case sizeof(u16): 91 WARN_ON(count & 1); 92 ioread16_rep(addr, buffer, count >> 1); 93 break; 94 case sizeof(u32): 95 WARN_ON(count & 3); 96 ioread32_rep(addr, buffer, count >> 2); 97 break; 98 default: 99 WARN_ON(1); 100 } 101 } 102 103 static void bcma_host_pci_block_write(struct bcma_device *core, 104 const void *buffer, size_t count, 105 u16 offset, u8 reg_width) 106 { 107 void __iomem *addr = core->bus->mmio + offset; 108 if (core->bus->mapped_core != core) 109 bcma_host_pci_switch_core(core); 110 switch (reg_width) { 111 case sizeof(u8): 112 iowrite8_rep(addr, buffer, count); 113 break; 114 case sizeof(u16): 115 WARN_ON(count & 1); 116 iowrite16_rep(addr, buffer, count >> 1); 117 break; 118 case sizeof(u32): 119 WARN_ON(count & 3); 120 iowrite32_rep(addr, buffer, count >> 2); 121 break; 122 default: 123 WARN_ON(1); 124 } 125 } 126 #endif 127 128 static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset) 129 { 130 if (core->bus->mapped_core != core) 131 bcma_host_pci_switch_core(core); 132 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset); 133 } 134 135 static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset, 136 u32 value) 137 { 138 if (core->bus->mapped_core != core) 139 bcma_host_pci_switch_core(core); 140 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset); 141 } 142 143 static const struct bcma_host_ops bcma_host_pci_ops = { 144 .read8 = bcma_host_pci_read8, 145 .read16 = bcma_host_pci_read16, 146 .read32 = bcma_host_pci_read32, 147 .write8 = bcma_host_pci_write8, 148 .write16 = bcma_host_pci_write16, 149 .write32 = bcma_host_pci_write32, 150 #ifdef CONFIG_BCMA_BLOCKIO 151 .block_read = bcma_host_pci_block_read, 152 .block_write = bcma_host_pci_block_write, 153 #endif 154 .aread32 = bcma_host_pci_aread32, 155 .awrite32 = bcma_host_pci_awrite32, 156 }; 157 158 static int bcma_host_pci_probe(struct pci_dev *dev, 159 const struct pci_device_id *id) 160 { 161 struct bcma_bus *bus; 162 int err = -ENOMEM; 163 const char *name; 164 u32 val; 165 166 /* Alloc */ 167 bus = kzalloc(sizeof(*bus), GFP_KERNEL); 168 if (!bus) 169 goto out; 170 171 /* Basic PCI configuration */ 172 err = pci_enable_device(dev); 173 if (err) 174 goto err_kfree_bus; 175 176 name = dev_name(&dev->dev); 177 if (dev->driver && dev->driver->name) 178 name = dev->driver->name; 179 err = pci_request_regions(dev, name); 180 if (err) 181 goto err_pci_disable; 182 pci_set_master(dev); 183 184 /* Disable the RETRY_TIMEOUT register (0x41) to keep 185 * PCI Tx retries from interfering with C3 CPU state */ 186 pci_read_config_dword(dev, 0x40, &val); 187 if ((val & 0x0000ff00) != 0) 188 pci_write_config_dword(dev, 0x40, val & 0xffff00ff); 189 190 /* SSB needed additional powering up, do we have any AMBA PCI cards? */ 191 if (!pci_is_pcie(dev)) { 192 bcma_err(bus, "PCI card detected, they are not supported.\n"); 193 err = -ENXIO; 194 goto err_pci_release_regions; 195 } 196 197 /* Map MMIO */ 198 err = -ENOMEM; 199 bus->mmio = pci_iomap(dev, 0, ~0UL); 200 if (!bus->mmio) 201 goto err_pci_release_regions; 202 203 /* Host specific */ 204 bus->host_pci = dev; 205 bus->hosttype = BCMA_HOSTTYPE_PCI; 206 bus->ops = &bcma_host_pci_ops; 207 208 bus->boardinfo.vendor = bus->host_pci->subsystem_vendor; 209 bus->boardinfo.type = bus->host_pci->subsystem_device; 210 211 /* Register */ 212 err = bcma_bus_register(bus); 213 if (err) 214 goto err_pci_unmap_mmio; 215 216 pci_set_drvdata(dev, bus); 217 218 out: 219 return err; 220 221 err_pci_unmap_mmio: 222 pci_iounmap(dev, bus->mmio); 223 err_pci_release_regions: 224 pci_release_regions(dev); 225 err_pci_disable: 226 pci_disable_device(dev); 227 err_kfree_bus: 228 kfree(bus); 229 return err; 230 } 231 232 static void bcma_host_pci_remove(struct pci_dev *dev) 233 { 234 struct bcma_bus *bus = pci_get_drvdata(dev); 235 236 bcma_bus_unregister(bus); 237 pci_iounmap(dev, bus->mmio); 238 pci_release_regions(dev); 239 pci_disable_device(dev); 240 kfree(bus); 241 } 242 243 #ifdef CONFIG_PM_SLEEP 244 static int bcma_host_pci_suspend(struct device *dev) 245 { 246 struct pci_dev *pdev = to_pci_dev(dev); 247 struct bcma_bus *bus = pci_get_drvdata(pdev); 248 249 bus->mapped_core = NULL; 250 251 return bcma_bus_suspend(bus); 252 } 253 254 static int bcma_host_pci_resume(struct device *dev) 255 { 256 struct pci_dev *pdev = to_pci_dev(dev); 257 struct bcma_bus *bus = pci_get_drvdata(pdev); 258 259 return bcma_bus_resume(bus); 260 } 261 262 static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend, 263 bcma_host_pci_resume); 264 #define BCMA_PM_OPS (&bcma_pm_ops) 265 266 #else /* CONFIG_PM_SLEEP */ 267 268 #define BCMA_PM_OPS NULL 269 270 #endif /* CONFIG_PM_SLEEP */ 271 272 static const struct pci_device_id bcma_pci_bridge_tbl[] = { 273 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) }, 274 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4313) }, 275 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) }, 276 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) }, 277 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) }, 278 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) }, 279 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) }, 280 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) }, 281 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4365) }, 282 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) }, 283 { 0, }, 284 }; 285 MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl); 286 287 static struct pci_driver bcma_pci_bridge_driver = { 288 .name = "bcma-pci-bridge", 289 .id_table = bcma_pci_bridge_tbl, 290 .probe = bcma_host_pci_probe, 291 .remove = bcma_host_pci_remove, 292 .driver.pm = BCMA_PM_OPS, 293 }; 294 295 int __init bcma_host_pci_init(void) 296 { 297 return pci_register_driver(&bcma_pci_bridge_driver); 298 } 299 300 void __exit bcma_host_pci_exit(void) 301 { 302 pci_unregister_driver(&bcma_pci_bridge_driver); 303 } 304