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/*
* Broadcom specific AMBA
* PCI Host
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include "bcma_private.h"
#include <linux/bcma/bcma.h>
#include <linux/pci.h>
static void bcma_host_pci_switch_core(struct bcma_device *core)
{
pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN,
core->addr);
pci_write_config_dword(core->bus->host_pci, BCMA_PCI_BAR0_WIN2,
core->wrap);
core->bus->mapped_core = core;
pr_debug("Switched to core: 0x%X\n", core->id.id);
}
static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
return ioread8(core->bus->mmio + offset);
}
static u16 bcma_host_pci_read16(struct bcma_device *core, u16 offset)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
return ioread16(core->bus->mmio + offset);
}
static u32 bcma_host_pci_read32(struct bcma_device *core, u16 offset)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
return ioread32(core->bus->mmio + offset);
}
static void bcma_host_pci_write8(struct bcma_device *core, u16 offset,
u8 value)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
iowrite8(value, core->bus->mmio + offset);
}
static void bcma_host_pci_write16(struct bcma_device *core, u16 offset,
u16 value)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
iowrite16(value, core->bus->mmio + offset);
}
static void bcma_host_pci_write32(struct bcma_device *core, u16 offset,
u32 value)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
iowrite32(value, core->bus->mmio + offset);
}
static u32 bcma_host_pci_aread32(struct bcma_device *core, u16 offset)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
return ioread32(core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
}
static void bcma_host_pci_awrite32(struct bcma_device *core, u16 offset,
u32 value)
{
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
iowrite32(value, core->bus->mmio + (1 * BCMA_CORE_SIZE) + offset);
}
const struct bcma_host_ops bcma_host_pci_ops = {
.read8 = bcma_host_pci_read8,
.read16 = bcma_host_pci_read16,
.read32 = bcma_host_pci_read32,
.write8 = bcma_host_pci_write8,
.write16 = bcma_host_pci_write16,
.write32 = bcma_host_pci_write32,
.aread32 = bcma_host_pci_aread32,
.awrite32 = bcma_host_pci_awrite32,
};
static int bcma_host_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
struct bcma_bus *bus;
int err = -ENOMEM;
const char *name;
u32 val;
/* Alloc */
bus = kzalloc(sizeof(*bus), GFP_KERNEL);
if (!bus)
goto out;
/* Basic PCI configuration */
err = pci_enable_device(dev);
if (err)
goto err_kfree_bus;
name = dev_name(&dev->dev);
if (dev->driver && dev->driver->name)
name = dev->driver->name;
err = pci_request_regions(dev, name);
if (err)
goto err_pci_disable;
pci_set_master(dev);
/* Disable the RETRY_TIMEOUT register (0x41) to keep
* PCI Tx retries from interfering with C3 CPU state */
pci_read_config_dword(dev, 0x40, &val);
if ((val & 0x0000ff00) != 0)
pci_write_config_dword(dev, 0x40, val & 0xffff00ff);
/* SSB needed additional powering up, do we have any AMBA PCI cards? */
if (!pci_is_pcie(dev))
pr_err("PCI card detected, report problems.\n");
/* Map MMIO */
err = -ENOMEM;
bus->mmio = pci_iomap(dev, 0, ~0UL);
if (!bus->mmio)
goto err_pci_release_regions;
/* Host specific */
bus->host_pci = dev;
bus->hosttype = BCMA_HOSTTYPE_PCI;
bus->ops = &bcma_host_pci_ops;
/* Register */
err = bcma_bus_register(bus);
if (err)
goto err_pci_unmap_mmio;
pci_set_drvdata(dev, bus);
out:
return err;
err_pci_unmap_mmio:
pci_iounmap(dev, bus->mmio);
err_pci_release_regions:
pci_release_regions(dev);
err_pci_disable:
pci_disable_device(dev);
err_kfree_bus:
kfree(bus);
return err;
}
static void bcma_host_pci_remove(struct pci_dev *dev)
{
struct bcma_bus *bus = pci_get_drvdata(dev);
bcma_bus_unregister(bus);
pci_iounmap(dev, bus->mmio);
pci_release_regions(dev);
pci_disable_device(dev);
kfree(bus);
pci_set_drvdata(dev, NULL);
}
static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4353) },
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4727) },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, bcma_pci_bridge_tbl);
static struct pci_driver bcma_pci_bridge_driver = {
.name = "bcma-pci-bridge",
.id_table = bcma_pci_bridge_tbl,
.probe = bcma_host_pci_probe,
.remove = bcma_host_pci_remove,
};
int __init bcma_host_pci_init(void)
{
return pci_register_driver(&bcma_pci_bridge_driver);
}
void __exit bcma_host_pci_exit(void)
{
pci_unregister_driver(&bcma_pci_bridge_driver);
}
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