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authorRafał Miłecki <zajec5@gmail.com>2011-12-05 19:13:39 +0100
committerJohn W. Linville <linville@tuxdriver.com>2011-12-06 16:07:07 -0500
commit439678f8b0fca7aeca06c6581e3679eef618721a (patch)
tree3a447b563f90144306c9548456e48cb37edd56d7 /drivers/bcma
parent3df6eaea76a9e1351b539541c0314129a0e4b10c (diff)
downloadlinux-439678f8b0fca7aeca06c6581e3679eef618721a.tar.bz2
bcma: pci: use fixed windows when possible
Some cores are mapped in the fixed way, they registers can be accessed all the time. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/bcma')
-rw-r--r--drivers/bcma/host_pci.c32
1 files changed, 21 insertions, 11 deletions
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
index 1b51d8b7ac80..b0994c0e05dc 100644
--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -21,48 +21,58 @@ static void bcma_host_pci_switch_core(struct bcma_device *core)
pr_debug("Switched to core: 0x%X\n", core->id.id);
}
-static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
+/* Provides access to the requested core. Returns base offset that has to be
+ * used. It makes use of fixed windows when possible. */
+static u16 bcma_host_pci_provide_access_to_core(struct bcma_device *core)
{
+ switch (core->id.id) {
+ case BCMA_CORE_CHIPCOMMON:
+ return 3 * BCMA_CORE_SIZE;
+ case BCMA_CORE_PCIE:
+ return 2 * BCMA_CORE_SIZE;
+ }
+
if (core->bus->mapped_core != core)
bcma_host_pci_switch_core(core);
+ return 0;
+}
+
+static u8 bcma_host_pci_read8(struct bcma_device *core, u16 offset)
+{
+ offset += bcma_host_pci_provide_access_to_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);
+ offset += bcma_host_pci_provide_access_to_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);
+ offset += bcma_host_pci_provide_access_to_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);
+ offset += bcma_host_pci_provide_access_to_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);
+ offset += bcma_host_pci_provide_access_to_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);
+ offset += bcma_host_pci_provide_access_to_core(core);
iowrite32(value, core->bus->mmio + offset);
}