v4.19.13 snapshot.
diff --git a/drivers/bcma/host_soc.c b/drivers/bcma/host_soc.c
new file mode 100644
index 0000000..2dce347
--- /dev/null
+++ b/drivers/bcma/host_soc.c
@@ -0,0 +1,278 @@
+/*
+ * 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/slab.h>
+#include <linux/module.h>
+#include <linux/of_address.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)
+{
+ if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n"))
+ return ~0;
+ return readl(core->io_wrap + offset);
+}
+
+static void bcma_host_soc_awrite32(struct bcma_device *core, u16 offset,
+ u32 value)
+{
+ if (WARN_ONCE(!core->io_wrap, "Accessed core has no wrapper/agent\n"))
+ return;
+ writel(value, core->io_wrap + offset);
+}
+
+static 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;
+
+ /* 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;
+ bus->host_pdev = NULL;
+
+ /* Initialize struct, detect chip */
+ bcma_init_bus(bus);
+
+ return 0;
+}
+
+int __init bcma_host_soc_init(struct bcma_soc *soc)
+{
+ struct bcma_bus *bus = &soc->bus;
+ int err;
+
+ /* Scan bus and initialize it */
+ err = bcma_bus_early_register(bus);
+ if (err)
+ iounmap(bus->mmio);
+
+ return err;
+}
+
+#ifdef CONFIG_OF
+static int bcma_host_soc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct bcma_bus *bus;
+ int err;
+
+ /* Alloc */
+ bus = devm_kzalloc(dev, sizeof(*bus), GFP_KERNEL);
+ if (!bus)
+ return -ENOMEM;
+
+ /* Map MMIO */
+ bus->mmio = of_iomap(np, 0);
+ if (!bus->mmio)
+ return -ENOMEM;
+
+ /* Host specific */
+ bus->hosttype = BCMA_HOSTTYPE_SOC;
+ bus->ops = &bcma_host_soc_ops;
+ bus->host_pdev = pdev;
+
+ /* Initialize struct, detect chip */
+ bcma_init_bus(bus);
+
+ /* Register */
+ err = bcma_bus_register(bus);
+ if (err)
+ goto err_unmap_mmio;
+
+ platform_set_drvdata(pdev, bus);
+
+ return err;
+
+err_unmap_mmio:
+ iounmap(bus->mmio);
+ return err;
+}
+
+static int bcma_host_soc_remove(struct platform_device *pdev)
+{
+ struct bcma_bus *bus = platform_get_drvdata(pdev);
+
+ bcma_bus_unregister(bus);
+ iounmap(bus->mmio);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id bcma_host_soc_of_match[] = {
+ { .compatible = "brcm,bus-axi", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bcma_host_soc_of_match);
+
+static struct platform_driver bcma_host_soc_driver = {
+ .driver = {
+ .name = "bcma-host-soc",
+ .of_match_table = bcma_host_soc_of_match,
+ },
+ .probe = bcma_host_soc_probe,
+ .remove = bcma_host_soc_remove,
+};
+
+int __init bcma_host_soc_register_driver(void)
+{
+ return platform_driver_register(&bcma_host_soc_driver);
+}
+
+void __exit bcma_host_soc_unregister_driver(void)
+{
+ platform_driver_unregister(&bcma_host_soc_driver);
+}
+#endif /* CONFIG_OF */