2 * Broadcom specific AMBA
5 * Licensed under the GNU/GPL. See COPYING for details.
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>
14 static void bcma_host_pci_switch_core(struct bcma_device *core)
16 int win2 = core->bus->host_is_pcie2 ?
17 BCMA_PCIE2_BAR0_WIN2 : BCMA_PCI_BAR0_WIN2;
19 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
21 pci_write_config_dword(core->bus->host_pci, win2, core->wrap);
22 core->bus->mapped_core = core;
23 bcma_debug(core->bus, "Switched to core: 0x%X\n", core->id.id);
26 /* Provides access to the requested core. Returns base offset that has to be
27 * used. It makes use of fixed windows when possible. */
28 static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
30 switch (core->id.id) {
31 case BCMA_CORE_CHIPCOMMON:
32 return 3 * BCMA_CORE_SIZE;
34 return 2 * BCMA_CORE_SIZE;
37 if (core->bus->mapped_core != core)
38 bcma_host_pci_switch_core(core);
42 static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
44 offset += bcma_host_pci_provide_access_to_core(core);
45 return ioread8(core->bus->mmio + offset);
48 static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
50 offset += bcma_host_pci_provide_access_to_core(core);
51 return ioread16(core->bus->mmio + offset);
54 static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
56 offset += bcma_host_pci_provide_access_to_core(core);
57 return ioread32(core->bus->mmio + offset);
60 static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
63 offset += bcma_host_pci_provide_access_to_core(core);
64 iowrite8(value, core->bus->mmio + offset);
67 static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
70 offset += bcma_host_pci_provide_access_to_core(core);
71 iowrite16(value, core->bus->mmio + offset);
74 static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
77 offset += bcma_host_pci_provide_access_to_core(core);
78 iowrite32(value, core->bus->mmio + offset);
81 #ifdef CONFIG_BCMA_BLOCKIO
82 static void bcma_host_pci_block_read(struct bcma_device *core, void *buffer,
83 size_t count, u16 offset, u8 reg_width)
85 void __iomem *addr = core->bus->mmio + offset;
86 if (core->bus->mapped_core != core)
87 bcma_host_pci_switch_core(core);
90 ioread8_rep(addr, buffer, count);
94 ioread16_rep(addr, buffer, count >> 1);
98 ioread32_rep(addr, buffer, count >> 2);
105 static void bcma_host_pci_block_write(struct bcma_device *core,
106 const void *buffer, size_t count,
107 u16 offset, u8 reg_width)
109 void __iomem *addr = core->bus->mmio + offset;
110 if (core->bus->mapped_core != core)
111 bcma_host_pci_switch_core(core);
114 iowrite8_rep(addr, buffer, count);
118 iowrite16_rep(addr, buffer, count >> 1);
122 iowrite32_rep(addr, buffer, count >> 2);
130 static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
132 if (core->bus->mapped_core != core)
133 bcma_host_pci_switch_core(core);
134 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
137 static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
140 if (core->bus->mapped_core != core)
141 bcma_host_pci_switch_core(core);
142 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
145 static const struct bcma_host_ops bcma_host_pci_ops = {
146 .read8 = bcma_host_pci_read8,
147 .read16 = bcma_host_pci_read16,
148 .read32 = bcma_host_pci_read32,
149 .write8 = bcma_host_pci_write8,
150 .write16 = bcma_host_pci_write16,
151 .write32 = bcma_host_pci_write32,
152 #ifdef CONFIG_BCMA_BLOCKIO
153 .block_read = bcma_host_pci_block_read,
154 .block_write = bcma_host_pci_block_write,
156 .aread32 = bcma_host_pci_aread32,
157 .awrite32 = bcma_host_pci_awrite32,
160 static int bcma_host_pci_probe(struct pci_dev *dev,
161 const struct pci_device_id *id)
163 struct bcma_bus *bus;
169 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
173 /* Basic PCI configuration */
174 err = pci_enable_device(dev);
178 name = dev_name(&dev->dev);
179 if (dev->driver && dev->driver->name)
180 name = dev->driver->name;
181 err = pci_request_regions(dev, name);
183 goto err_pci_disable;
186 /* Disable the RETRY_TIMEOUT register (0x41) to keep
187 * PCI Tx retries from interfering with C3 CPU state */
188 pci_read_config_dword(dev, 0x40, &val);
189 if ((val & 0x0000ff00) != 0)
190 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
192 /* SSB needed additional powering up, do we have any AMBA PCI cards? */
193 if (!pci_is_pcie(dev)) {
194 bcma_err(bus, "PCI card detected, they are not supported.\n");
196 goto err_pci_release_regions;
201 bus->mmio = pci_iomap(dev, 0, ~0UL);
203 goto err_pci_release_regions;
207 bus->hosttype = BCMA_HOSTTYPE_PCI;
208 bus->ops = &bcma_host_pci_ops;
210 bus->boardinfo.vendor = bus->host_pci->subsystem_vendor;
211 bus->boardinfo.type = bus->host_pci->subsystem_device;
213 /* Initialize struct, detect chip */
216 /* Scan bus to find out generation of PCIe core */
217 err = bcma_bus_scan(bus);
219 goto err_pci_unmap_mmio;
221 if (bcma_find_core(bus, BCMA_CORE_PCIE2))
222 bus->host_is_pcie2 = true;
225 err = bcma_bus_register(bus);
227 goto err_unregister_cores;
229 pci_set_drvdata(dev, bus);
234 err_unregister_cores:
235 bcma_unregister_cores(bus);
237 pci_iounmap(dev, bus->mmio);
238 err_pci_release_regions:
239 pci_release_regions(dev);
241 pci_disable_device(dev);
247 static void bcma_host_pci_remove(struct pci_dev *dev)
249 struct bcma_bus *bus = pci_get_drvdata(dev);
251 bcma_bus_unregister(bus);
252 pci_iounmap(dev, bus->mmio);
253 pci_release_regions(dev);
254 pci_disable_device(dev);
258 #ifdef CONFIG_PM_SLEEP
259 static int bcma_host_pci_suspend(struct device *dev)
261 struct pci_dev *pdev = to_pci_dev(dev);
262 struct bcma_bus *bus = pci_get_drvdata(pdev);
264 bus->mapped_core = NULL;
266 return bcma_bus_suspend(bus);
269 static int bcma_host_pci_resume(struct device *dev)
271 struct pci_dev *pdev = to_pci_dev(dev);
272 struct bcma_bus *bus = pci_get_drvdata(pdev);
274 return bcma_bus_resume(bus);
277 static SIMPLE_DEV_PM_OPS(bcma_pm_ops, bcma_host_pci_suspend,
278 bcma_host_pci_resume);
279 #define BCMA_PM_OPS (&bcma_pm_ops)
281 #else /* CONFIG_PM_SLEEP */
283 #define BCMA_PM_OPS NULL
285 #endif /* CONFIG_PM_SLEEP */
287 static const struct pci_device_id bcma_pci_bridge_tbl[] = {
288 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
289 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4313) },
290 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43224) }, /* 0xa8d8 */
291 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
292 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
293 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4357) },
294 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4358) },
295 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4359) },
296 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4360) },
297 { PCI_DEVICE_SUB(PCI_VENDOR_ID_BROADCOM, 0x4365, PCI_VENDOR_ID_DELL, 0x0016) },
298 { PCI_DEVICE_SUB(PCI_VENDOR_ID_BROADCOM, 0x4365, PCI_VENDOR_ID_DELL, 0x0018) },
299 { PCI_DEVICE_SUB(PCI_VENDOR_ID_BROADCOM, 0x4365, PCI_VENDOR_ID_FOXCONN, 0xe092) },
300 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a0) },
301 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43a9) },
302 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43aa) },
303 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x43b1) },
304 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
305 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43227) }, /* 0xa8db, BCM43217 (sic!) */
306 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 43228) }, /* 0xa8dc */
309 MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
311 static struct pci_driver bcma_pci_bridge_driver = {
312 .name = "bcma-pci-bridge",
313 .id_table = bcma_pci_bridge_tbl,
314 .probe = bcma_host_pci_probe,
315 .remove = bcma_host_pci_remove,
316 .driver.pm = BCMA_PM_OPS,
319 int __init bcma_host_pci_init(void)
321 return pci_register_driver(&bcma_pci_bridge_driver);
324 void __exit bcma_host_pci_exit(void)
326 pci_unregister_driver(&bcma_pci_bridge_driver);
329 /**************************************************
330 * Runtime ops for drivers.
331 **************************************************/
333 /* See also pcicore_up */
334 void bcma_host_pci_up(struct bcma_bus *bus)
336 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
339 if (bus->host_is_pcie2)
340 bcma_core_pcie2_up(&bus->drv_pcie2);
342 bcma_core_pci_up(&bus->drv_pci[0]);
344 EXPORT_SYMBOL_GPL(bcma_host_pci_up);
346 /* See also pcicore_down */
347 void bcma_host_pci_down(struct bcma_bus *bus)
349 if (bus->hosttype != BCMA_HOSTTYPE_PCI)
352 if (!bus->host_is_pcie2)
353 bcma_core_pci_down(&bus->drv_pci[0]);
355 EXPORT_SYMBOL_GPL(bcma_host_pci_down);
357 /* See also si_pci_setup */
358 int bcma_host_pci_irq_ctl(struct bcma_bus *bus, struct bcma_device *core,
361 struct pci_dev *pdev;
365 if (bus->hosttype != BCMA_HOSTTYPE_PCI) {
366 /* This bcma device is not on a PCI host-bus. So the IRQs are
367 * not routed through the PCI core.
368 * So we must not enable routing through the PCI core. */
372 pdev = bus->host_pci;
374 err = pci_read_config_dword(pdev, BCMA_PCI_IRQMASK, &tmp);
378 coremask = BIT(core->core_index) << 8;
384 err = pci_write_config_dword(pdev, BCMA_PCI_IRQMASK, tmp);
389 EXPORT_SYMBOL_GPL(bcma_host_pci_irq_ctl);