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path: root/drivers/bcma/host_soc.c
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Diffstat (limited to 'drivers/bcma/host_soc.c')
-rw-r--r--drivers/bcma/host_soc.c183
1 files changed, 183 insertions, 0 deletions
diff --git a/drivers/bcma/host_soc.c b/drivers/bcma/host_soc.c
new file mode 100644
index 00000000000..3c381fb8f9c
--- /dev/null
+++ b/drivers/bcma/host_soc.c
@@ -0,0 +1,183 @@
+/*
+ * Broadcom specific AMBA
+ * System on Chip (SoC) Host
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include "scan.h"
+#include <linux/bcma/bcma.h>
+#include <linux/bcma/bcma_soc.h>
+
+static u8 bcma_host_soc_read8(struct bcma_device *core, u16 offset)
+{
+ return readb(core->io_addr + offset);
+}
+
+static u16 bcma_host_soc_read16(struct bcma_device *core, u16 offset)
+{
+ return readw(core->io_addr + offset);
+}
+
+static u32 bcma_host_soc_read32(struct bcma_device *core, u16 offset)
+{
+ return readl(core->io_addr + offset);
+}
+
+static void bcma_host_soc_write8(struct bcma_device *core, u16 offset,
+ u8 value)
+{
+ writeb(value, core->io_addr + offset);
+}
+
+static void bcma_host_soc_write16(struct bcma_device *core, u16 offset,
+ u16 value)
+{
+ writew(value, core->io_addr + offset);
+}
+
+static void bcma_host_soc_write32(struct bcma_device *core, u16 offset,
+ u32 value)
+{
+ writel(value, core->io_addr + offset);
+}
+
+#ifdef CONFIG_BCMA_BLOCKIO
+static void bcma_host_soc_block_read(struct bcma_device *core, void *buffer,
+ size_t count, u16 offset, u8 reg_width)
+{
+ void __iomem *addr = core->io_addr + offset;
+
+ switch (reg_width) {
+ case sizeof(u8): {
+ u8 *buf = buffer;
+
+ while (count) {
+ *buf = __raw_readb(addr);
+ buf++;
+ count--;
+ }
+ break;
+ }
+ case sizeof(u16): {
+ __le16 *buf = buffer;
+
+ WARN_ON(count & 1);
+ while (count) {
+ *buf = (__force __le16)__raw_readw(addr);
+ buf++;
+ count -= 2;
+ }
+ break;
+ }
+ case sizeof(u32): {
+ __le32 *buf = buffer;
+
+ WARN_ON(count & 3);
+ while (count) {
+ *buf = (__force __le32)__raw_readl(addr);
+ buf++;
+ count -= 4;
+ }
+ break;
+ }
+ default:
+ WARN_ON(1);
+ }
+}
+
+static void bcma_host_soc_block_write(struct bcma_device *core,
+ const void *buffer,
+ size_t count, u16 offset, u8 reg_width)
+{
+ void __iomem *addr = core->io_addr + offset;
+
+ switch (reg_width) {
+ case sizeof(u8): {
+ const u8 *buf = buffer;
+
+ while (count) {
+ __raw_writeb(*buf, addr);
+ buf++;
+ count--;
+ }
+ break;
+ }
+ case sizeof(u16): {
+ const __le16 *buf = buffer;
+
+ WARN_ON(count & 1);
+ while (count) {
+ __raw_writew((__force u16)(*buf), addr);
+ buf++;
+ count -= 2;
+ }
+ break;
+ }
+ case sizeof(u32): {
+ const __le32 *buf = buffer;
+
+ WARN_ON(count & 3);
+ while (count) {
+ __raw_writel((__force u32)(*buf), addr);
+ buf++;
+ count -= 4;
+ }
+ break;
+ }
+ default:
+ WARN_ON(1);
+ }
+}
+#endif /* CONFIG_BCMA_BLOCKIO */
+
+static u32 bcma_host_soc_aread32(struct bcma_device *core, u16 offset)
+{
+ return readl(core->io_wrap + offset);
+}
+
+static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset,
+ u32 value)
+{
+ writel(value, core->io_wrap + offset);
+}
+
+const struct bcma_host_ops bcma_host_soc_ops = {
+ .read8 = bcma_host_soc_read8,
+ .read16 = bcma_host_soc_read16,
+ .read32 = bcma_host_soc_read32,
+ .write8 = bcma_host_soc_write8,
+ .write16 = bcma_host_soc_write16,
+ .write32 = bcma_host_soc_write32,
+#ifdef CONFIG_BCMA_BLOCKIO
+ .block_read = bcma_host_soc_block_read,
+ .block_write = bcma_host_soc_block_write,
+#endif
+ .aread32 = bcma_host_soc_aread32,
+ .awrite32 = bcma_host_soc_awrite32,
+};
+
+int __init bcma_host_soc_register(struct bcma_soc *soc)
+{
+ struct bcma_bus *bus = &soc->bus;
+ int err;
+
+ /* iomap only first core. We have to read some register on this core
+ * to scan the bus.
+ */
+ bus->mmio = ioremap_nocache(BCMA_ADDR_BASE, BCMA_CORE_SIZE * 1);
+ if (!bus->mmio)
+ return -ENOMEM;
+
+ /* Host specific */
+ bus->hosttype = BCMA_HOSTTYPE_SOC;
+ bus->ops = &bcma_host_soc_ops;
+
+ /* Register */
+ err = bcma_bus_early_register(bus, &soc->core_cc, &soc->core_mips);
+ if (err)
+ iounmap(bus->mmio);
+
+ return err;
+}