2 * Broadcom specific AMBA
5 * Licensed under the GNU/GPL. See COPYING for details.
8 #include "bcma_private.h"
9 #include <linux/bcma/bcma.h>
10 #include <linux/pci.h>
12 static void bcma_host_pci_switch_core(struct bcma_device *core)
14 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
16 pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
18 core->bus->mapped_core = core;
19 pr_debug("Switched to core: 0x%X\n", core->id.id);
22 static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
24 if (core->bus->mapped_core != core)
25 bcma_host_pci_switch_core(core);
26 return ioread8(core->bus->mmio + offset);
29 static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
31 if (core->bus->mapped_core != core)
32 bcma_host_pci_switch_core(core);
33 return ioread16(core->bus->mmio + offset);
36 static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
38 if (core->bus->mapped_core != core)
39 bcma_host_pci_switch_core(core);
40 return ioread32(core->bus->mmio + offset);
43 static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
46 if (core->bus->mapped_core != core)
47 bcma_host_pci_switch_core(core);
48 iowrite8(value, core->bus->mmio + offset);
51 static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
54 if (core->bus->mapped_core != core)
55 bcma_host_pci_switch_core(core);
56 iowrite16(value, core->bus->mmio + offset);
59 static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
62 if (core->bus->mapped_core != core)
63 bcma_host_pci_switch_core(core);
64 iowrite32(value, core->bus->mmio + offset);
67 static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
69 if (core->bus->mapped_core != core)
70 bcma_host_pci_switch_core(core);
71 return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
74 static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
77 if (core->bus->mapped_core != core)
78 bcma_host_pci_switch_core(core);
79 iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
82 const struct bcma_host_ops bcma_host_pci_ops = {
83 .read8 = bcma_host_pci_read8,
84 .read16 = bcma_host_pci_read16,
85 .read32 = bcma_host_pci_read32,
86 .write8 = bcma_host_pci_write8,
87 .write16 = bcma_host_pci_write16,
88 .write32 = bcma_host_pci_write32,
89 .aread32 = bcma_host_pci_aread32,
90 .awrite32 = bcma_host_pci_awrite32,
93 static int bcma_host_pci_probe(struct pci_dev *dev,
94 const struct pci_device_id *id)
102 bus = kzalloc(sizeof(*bus), GFP_KERNEL);
106 /* Basic PCI configuration */
107 err = pci_enable_device(dev);
111 name = dev_name(&dev->dev);
112 if (dev->driver && dev->driver->name)
113 name = dev->driver->name;
114 err = pci_request_regions(dev, name);
116 goto err_pci_disable;
119 /* Disable the RETRY_TIMEOUT register (0x41) to keep
120 * PCI Tx retries from interfering with C3 CPU state */
121 pci_read_config_dword(dev, 0x40, &val);
122 if ((val & 0x0000ff00) != 0)
123 pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
125 /* SSB needed additional powering up, do we have any AMBA PCI cards? */
126 if (!pci_is_pcie(dev))
127 pr_err("PCI card detected, report problems.\n");
131 bus->mmio = pci_iomap(dev, 0, ~0UL);
133 goto err_pci_release_regions;
137 bus->hosttype = BCMA_HOSTTYPE_PCI;
138 bus->ops = &bcma_host_pci_ops;
141 err = bcma_bus_register(bus);
143 goto err_pci_unmap_mmio;
145 pci_set_drvdata(dev, bus);
151 pci_iounmap(dev, bus->mmio);
152 err_pci_release_regions:
153 pci_release_regions(dev);
155 pci_disable_device(dev);
161 static void bcma_host_pci_remove(struct pci_dev *dev)
163 struct bcma_bus *bus = pci_get_drvdata(dev);
165 bcma_bus_unregister(bus);
166 pci_iounmap(dev, bus->mmio);
167 pci_release_regions(dev);
168 pci_disable_device(dev);
170 pci_set_drvdata(dev, NULL);
173 static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
174 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
175 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
176 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
179 MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
181 static struct pci_driver bcma_pci_bridge_driver = {
182 .name = "bcma-pci-bridge",
183 .id_table = bcma_pci_bridge_tbl,
184 .probe = bcma_host_pci_probe,
185 .remove = bcma_host_pci_remove,
188 int __init bcma_host_pci_init(void)
190 return pci_register_driver(&bcma_pci_bridge_driver);
193 void __exit bcma_host_pci_exit(void)
195 pci_unregister_driver(&bcma_pci_bridge_driver);