These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / ssb / host_soc.c

diff --git a/kernel/drivers/ssb/host_soc.c b/kernel/drivers/ssb/host_soc.c
new file mode 100644 (file)
index 0000000..c809f25
--- /dev/null
+++ b/kernel/drivers/ssb/host_soc.c
@@ -0,0 +1,173 @@
+/*
+ * Sonics Silicon Backplane SoC host related functions.
+ * Subsystem core
+ *
+ * Copyright 2005, Broadcom Corporation
+ * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include <linux/ssb/ssb.h>
+
+#include "ssb_private.h"
+
+static u8 ssb_host_soc_read8(struct ssb_device *dev, u16 offset)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       return readb(bus->mmio + offset);
+}
+
+static u16 ssb_host_soc_read16(struct ssb_device *dev, u16 offset)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       return readw(bus->mmio + offset);
+}
+
+static u32 ssb_host_soc_read32(struct ssb_device *dev, u16 offset)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       return readl(bus->mmio + offset);
+}
+
+#ifdef CONFIG_SSB_BLOCKIO
+static void ssb_host_soc_block_read(struct ssb_device *dev, void *buffer,
+                                   size_t count, u16 offset, u8 reg_width)
+{
+       struct ssb_bus *bus = dev->bus;
+       void __iomem *addr;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       addr = bus->mmio + 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;
+
+               SSB_WARN_ON(count & 1);
+               while (count) {
+                       *buf = (__force __le16)__raw_readw(addr);
+                       buf++;
+                       count -= 2;
+               }
+               break;
+       }
+       case sizeof(u32): {
+               __le32 *buf = buffer;
+
+               SSB_WARN_ON(count & 3);
+               while (count) {
+                       *buf = (__force __le32)__raw_readl(addr);
+                       buf++;
+                       count -= 4;
+               }
+               break;
+       }
+       default:
+               SSB_WARN_ON(1);
+       }
+}
+#endif /* CONFIG_SSB_BLOCKIO */
+
+static void ssb_host_soc_write8(struct ssb_device *dev, u16 offset, u8 value)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       writeb(value, bus->mmio + offset);
+}
+
+static void ssb_host_soc_write16(struct ssb_device *dev, u16 offset, u16 value)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       writew(value, bus->mmio + offset);
+}
+
+static void ssb_host_soc_write32(struct ssb_device *dev, u16 offset, u32 value)
+{
+       struct ssb_bus *bus = dev->bus;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       writel(value, bus->mmio + offset);
+}
+
+#ifdef CONFIG_SSB_BLOCKIO
+static void ssb_host_soc_block_write(struct ssb_device *dev, const void *buffer,
+                                    size_t count, u16 offset, u8 reg_width)
+{
+       struct ssb_bus *bus = dev->bus;
+       void __iomem *addr;
+
+       offset += dev->core_index * SSB_CORE_SIZE;
+       addr = bus->mmio + 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;
+
+               SSB_WARN_ON(count & 1);
+               while (count) {
+                       __raw_writew((__force u16)(*buf), addr);
+                       buf++;
+                       count -= 2;
+               }
+               break;
+       }
+       case sizeof(u32): {
+               const __le32 *buf = buffer;
+
+               SSB_WARN_ON(count & 3);
+               while (count) {
+                       __raw_writel((__force u32)(*buf), addr);
+                       buf++;
+                       count -= 4;
+               }
+               break;
+       }
+       default:
+               SSB_WARN_ON(1);
+       }
+}
+#endif /* CONFIG_SSB_BLOCKIO */
+
+/* Ops for the plain SSB bus without a host-device (no PCI or PCMCIA). */
+const struct ssb_bus_ops ssb_host_soc_ops = {
+       .read8          = ssb_host_soc_read8,
+       .read16         = ssb_host_soc_read16,
+       .read32         = ssb_host_soc_read32,
+       .write8         = ssb_host_soc_write8,
+       .write16        = ssb_host_soc_write16,
+       .write32        = ssb_host_soc_write32,
+#ifdef CONFIG_SSB_BLOCKIO
+       .block_read     = ssb_host_soc_block_read,
+       .block_write    = ssb_host_soc_block_write,
+#endif
+};