summaryrefslogtreecommitdiffstats
path: root/drivers/bcma/host_pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/bcma/host_pci.c')
-rw-r--r--drivers/bcma/host_pci.c196
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
new file mode 100644
index 000000000000..99dd36e8500b
--- /dev/null
+++ b/drivers/bcma/host_pci.c
@@ -0,0 +1,196 @@
+/*
+ * 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);
+}