bcma: add Broadcom specific AMBA bus driver

Broadcom has released cards based on a new AMBA-based bus type. From a
programming point of view, this new bus type differs from AMBA and does
not use AMBA common registers. It also differs enough from SSB. We
decided that a new bus driver is needed to keep the code clean.

In its current form, the driver detects devices present on the bus and
registers them in the system. It allows registering BCMA drivers for
specified bus devices and provides them basic operations. The bus driver
itself includes two important bus managing drivers: ChipCommon core
driver and PCI(c) core driver. They are early used to allow correct
initialization.

Currently code is limited to supporting buses on PCI(e) devices, however
the driver is designed to be used also on other hosts. The host
abstraction layer is implemented and already used for PCI(e).

Support for PCI(e) hosts is working and seems to be stable (access to
80211 core was tested successfully on a few devices). We can still
optimize it by using some fixed windows, but this can be done later
without affecting any external code. Windows are just ranges in MMIO
used for accessing cores on the bus.

Cc: Greg KH <greg@kroah.com>
Cc: Michael Büsch <mb@bu3sch.de>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: George Kashperko <george@znau.edu.ua>
Cc: Arend van Spriel <arend@broadcom.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Botting <andy@andybotting.com>
Cc: linuxdriverproject <devel@linuxdriverproject.org>
Cc: linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

15 files changed, 1387 insertions, 0 deletions

diff --git a/drivers/Kconfig b/drivers/Kconfig
index 177c7d1..aca7067 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -68,6 +68,8 @@ source "drivers/watchdog/Kconfig"
 
 source "drivers/ssb/Kconfig"
 
+source "drivers/bcma/Kconfig"
+
 source "drivers/mfd/Kconfig"
 
 source "drivers/regulator/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 3f135b6..a29527f 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -110,6 +110,7 @@ obj-$(CONFIG_HID)		+= hid/
 obj-$(CONFIG_PPC_PS3)		+= ps3/
 obj-$(CONFIG_OF)		+= of/
 obj-$(CONFIG_SSB)		+= ssb/
+obj-$(CONFIG_BCMA)		+= bcma/
 obj-$(CONFIG_VHOST_NET)		+= vhost/
 obj-$(CONFIG_VLYNQ)		+= vlynq/
 obj-$(CONFIG_STAGING)		+= staging/
diff --git a/drivers/bcma/Kconfig b/drivers/bcma/Kconfig
new file mode 100644
index 0000000..353781b
--- /dev/null
+++ b/drivers/bcma/Kconfig
@@ -0,0 +1,33 @@
+config BCMA_POSSIBLE
+	bool
+	depends on HAS_IOMEM && HAS_DMA
+	default y
+
+menu "Broadcom specific AMBA"
+	depends on BCMA_POSSIBLE
+
+config BCMA
+	tristate "BCMA support"
+	depends on BCMA_POSSIBLE
+	help
+	  Bus driver for Broadcom specific Advanced Microcontroller Bus
+	  Architecture.
+
+config BCMA_HOST_PCI_POSSIBLE
+	bool
+	depends on BCMA && PCI = y
+	default y
+
+config BCMA_HOST_PCI
+	bool "Support for BCMA on PCI-host bus"
+	depends on BCMA_HOST_PCI_POSSIBLE
+
+config BCMA_DEBUG
+	bool "BCMA debugging"
+	depends on BCMA
+	help
+	  This turns on additional debugging messages.
+
+	  If unsure, say N
+
+endmenu
diff --git a/drivers/bcma/Makefile b/drivers/bcma/Makefile
new file mode 100644
index 0000000..0d56245
--- /dev/null
+++ b/drivers/bcma/Makefile
@@ -0,0 +1,7 @@
+bcma-y					+= main.o scan.o core.o
+bcma-y					+= driver_chipcommon.o driver_chipcommon_pmu.o
+bcma-y					+= driver_pci.o
+bcma-$(CONFIG_BCMA_HOST_PCI)		+= host_pci.o
+obj-$(CONFIG_BCMA)			+= bcma.o
+
+ccflags-$(CONFIG_BCMA_DEBUG)		:= -DDEBUG
diff --git a/drivers/bcma/README b/drivers/bcma/README
new file mode 100644
index 0000000..f7e7ce4
--- /dev/null
+++ b/drivers/bcma/README
@@ -0,0 +1,19 @@
+Broadcom introduced new bus as replacement for older SSB. It is based on AMBA,
+however from programming point of view there is nothing AMBA specific we use.
+
+Standard AMBA drivers are platform specific, have hardcoded addresses and use
+AMBA standard fields like CID and PID.
+
+In case of Broadcom's cards every device consists of:
+1) Broadcom specific AMBA device. It is put on AMBA bus, but can not be treated
+   as standard AMBA device. Reading it's CID or PID can cause machine lockup.
+2) AMBA standard devices called ports or wrappers. They have CIDs (AMBA_CID)
+   and PIDs (0x103BB369), but we do not use that info for anything. One of that
+   devices is used for managing Broadcom specific core.
+
+Addresses of AMBA devices are not hardcoded in driver and have to be read from
+EPROM.
+
+In this situation we decided to introduce separated bus. It can contain up to
+16 devices identified by Broadcom specific fields: manufacturer, id, revision
+and class.
diff --git a/drivers/bcma/TODO b/drivers/bcma/TODO
new file mode 100644
index 0000000..da7aa99
--- /dev/null
+++ b/drivers/bcma/TODO
@@ -0,0 +1,3 @@
+- Interrupts
+- Defines for PCI core driver
+- Create kernel Documentation (use info from README)
diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
new file mode 100644
index 0000000..2f72e9c
--- /dev/null
+++ b/drivers/bcma/bcma_private.h
@@ -0,0 +1,28 @@
+#ifndef LINUX_BCMA_PRIVATE_H_
+#define LINUX_BCMA_PRIVATE_H_
+
+#ifndef pr_fmt
+#define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt
+#endif
+
+#include <linux/bcma/bcma.h>
+#include <linux/delay.h>
+
+#define BCMA_CORE_SIZE		0x1000
+
+struct bcma_bus;
+
+/* main.c */
+extern int bcma_bus_register(struct bcma_bus *bus);
+extern void bcma_bus_unregister(struct bcma_bus *bus);
+
+/* scan.c */
+int bcma_bus_scan(struct bcma_bus *bus);
+
+#ifdef CONFIG_BCMA_HOST_PCI
+/* host_pci.c */
+extern int __init bcma_host_pci_init(void);
+extern void __exit bcma_host_pci_exit(void);
+#endif /* CONFIG_BCMA_HOST_PCI */
+
+#endif
diff --git a/drivers/bcma/core.c b/drivers/bcma/core.c
new file mode 100644
index 0000000..ced379f
--- /dev/null
+++ b/drivers/bcma/core.c
@@ -0,0 +1,51 @@
+/*
+ * Broadcom specific AMBA
+ * Core ops
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+bool bcma_core_is_enabled(struct bcma_device *core)
+{
+	if ((bcma_aread32(core, BCMA_IOCTL) & (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC))
+	    != BCMA_IOCTL_CLK)
+		return false;
+	if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
+		return false;
+	return true;
+}
+EXPORT_SYMBOL_GPL(bcma_core_is_enabled);
+
+static void bcma_core_disable(struct bcma_device *core, u32 flags)
+{
+	if (bcma_aread32(core, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
+		return;
+
+	bcma_awrite32(core, BCMA_IOCTL, flags);
+	bcma_aread32(core, BCMA_IOCTL);
+	udelay(10);
+
+	bcma_awrite32(core, BCMA_RESET_CTL, BCMA_RESET_CTL_RESET);
+	udelay(1);
+}
+
+int bcma_core_enable(struct bcma_device *core, u32 flags)
+{
+	bcma_core_disable(core, flags);
+
+	bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
+	bcma_aread32(core, BCMA_IOCTL);
+
+	bcma_awrite32(core, BCMA_RESET_CTL, 0);
+	udelay(1);
+
+	bcma_awrite32(core, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
+	bcma_aread32(core, BCMA_IOCTL);
+	udelay(1);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(bcma_core_enable);
diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
new file mode 100644
index 0000000..caf5960
--- /dev/null
+++ b/drivers/bcma/driver_chipcommon.c
@@ -0,0 +1,87 @@
+/*
+ * Broadcom specific AMBA
+ * ChipCommon core driver
+ *
+ * Copyright 2005, Broadcom Corporation
+ * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
+					 u32 mask, u32 value)
+{
+	value &= mask;
+	value |= bcma_cc_read32(cc, offset) & ~mask;
+	bcma_cc_write32(cc, offset, value);
+
+	return value;
+}
+
+void bcma_core_chipcommon_init(struct bcma_drv_cc *cc)
+{
+	if (cc->core->id.rev >= 11)
+		cc->status = bcma_cc_read32(cc, BCMA_CC_CHIPSTAT);
+	cc->capabilities = bcma_cc_read32(cc, BCMA_CC_CAP);
+	if (cc->core->id.rev >= 35)
+		cc->capabilities_ext = bcma_cc_read32(cc, BCMA_CC_CAP_EXT);
+
+	bcma_cc_write32(cc, 0x58, 0);
+	bcma_cc_write32(cc, 0x5C, 0);
+
+	if (cc->capabilities & BCMA_CC_CAP_PMU)
+		bcma_pmu_init(cc);
+	if (cc->capabilities & BCMA_CC_CAP_PCTL)
+		pr_err("Power control not implemented!\n");
+}
+
+/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
+void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc, u32 ticks)
+{
+	/* instant NMI */
+	bcma_cc_write32(cc, BCMA_CC_WATCHDOG, ticks);
+}
+
+void bcma_chipco_irq_mask(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	bcma_cc_write32_masked(cc, BCMA_CC_IRQMASK, mask, value);
+}
+
+u32 bcma_chipco_irq_status(struct bcma_drv_cc *cc, u32 mask)
+{
+	return bcma_cc_read32(cc, BCMA_CC_IRQSTAT) & mask;
+}
+
+u32 bcma_chipco_gpio_in(struct bcma_drv_cc *cc, u32 mask)
+{
+	return bcma_cc_read32(cc, BCMA_CC_GPIOIN) & mask;
+}
+
+u32 bcma_chipco_gpio_out(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUT, mask, value);
+}
+
+u32 bcma_chipco_gpio_outen(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	return bcma_cc_write32_masked(cc, BCMA_CC_GPIOOUTEN, mask, value);
+}
+
+u32 bcma_chipco_gpio_control(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	return bcma_cc_write32_masked(cc, BCMA_CC_GPIOCTL, mask, value);
+}
+EXPORT_SYMBOL_GPL(bcma_chipco_gpio_control);
+
+u32 bcma_chipco_gpio_intmask(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	return bcma_cc_write32_masked(cc, BCMA_CC_GPIOIRQ, mask, value);
+}
+
+u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
+{
+	return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
+}
diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c
new file mode 100644
index 0000000..f44177a
--- /dev/null
+++ b/drivers/bcma/driver_chipcommon_pmu.c
@@ -0,0 +1,134 @@
+/*
+ * Broadcom specific AMBA
+ * ChipCommon Power Management Unit driver
+ *
+ * Copyright 2009, Michael Buesch <mb@bu3sch.de>
+ * Copyright 2007, Broadcom Corporation
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
+					u32 offset, u32 mask, u32 set)
+{
+	u32 value;
+
+	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
+	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_ADDR, offset);
+	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_ADDR);
+	value = bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
+	value &= mask;
+	value |= set;
+	bcma_cc_write32(cc, BCMA_CC_CHIPCTL_DATA, value);
+	bcma_cc_read32(cc, BCMA_CC_CHIPCTL_DATA);
+}
+
+static void bcma_pmu_pll_init(struct bcma_drv_cc *cc)
+{
+	struct bcma_bus *bus = cc->core->bus;
+
+	switch (bus->chipinfo.id) {
+	case 0x4313:
+	case 0x4331:
+	case 43224:
+	case 43225:
+		break;
+	default:
+		pr_err("PLL init unknown for device 0x%04X\n",
+			bus->chipinfo.id);
+	}
+}
+
+static void bcma_pmu_resources_init(struct bcma_drv_cc *cc)
+{
+	struct bcma_bus *bus = cc->core->bus;
+	u32 min_msk = 0, max_msk = 0;
+
+	switch (bus->chipinfo.id) {
+	case 0x4313:
+		min_msk = 0x200D;
+		max_msk = 0xFFFF;
+		break;
+	case 43224:
+		break;
+	default:
+		pr_err("PMU resource config unknown for device 0x%04X\n",
+			bus->chipinfo.id);
+	}
+
+	/* Set the resource masks. */
+	if (min_msk)
+		bcma_cc_write32(cc, BCMA_CC_PMU_MINRES_MSK, min_msk);
+	if (max_msk)
+		bcma_cc_write32(cc, BCMA_CC_PMU_MAXRES_MSK, max_msk);
+}
+
+void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
+{
+	struct bcma_bus *bus = cc->core->bus;
+
+	switch (bus->chipinfo.id) {
+	case 0x4313:
+	case 0x4331:
+	case 43224:
+		break;
+	default:
+		pr_err("PMU switch/regulators init unknown for device "
+			"0x%04X\n", bus->chipinfo.id);
+	}
+}
+
+void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
+{
+	struct bcma_bus *bus = cc->core->bus;
+
+	switch (bus->chipinfo.id) {
+	case 0x4313:
+		bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
+		break;
+	case 0x4331:
+		pr_err("Enabling Ext PA lines not implemented\n");
+		break;
+	case 43224:
+		if (bus->chipinfo.rev == 0) {
+			pr_err("Workarounds for 43224 rev 0 not fully "
+				"implemented\n");
+			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
+		} else {
+			bcma_chipco_chipctl_maskset(cc, 0, ~0, 0xF0);
+		}
+		break;
+	default:
+		pr_err("Workarounds unknown for device 0x%04X\n",
+			bus->chipinfo.id);
+	}
+}
+
+void bcma_pmu_init(struct bcma_drv_cc *cc)
+{
+	u32 pmucap;
+
+	pmucap = bcma_cc_read32(cc, BCMA_CC_PMU_CAP);
+	cc->pmu.rev = (pmucap & BCMA_CC_PMU_CAP_REVISION);
+
+	pr_debug("Found rev %u PMU (capabilities 0x%08X)\n", cc->pmu.rev,
+		 pmucap);
+
+	if (cc->pmu.rev == 1)
+		bcma_cc_mask32(cc, BCMA_CC_PMU_CTL,
+			      ~BCMA_CC_PMU_CTL_NOILPONW);
+	else
+		bcma_cc_set32(cc, BCMA_CC_PMU_CTL,
+			     BCMA_CC_PMU_CTL_NOILPONW);
+
+	if (cc->core->id.id == 0x4329 && cc->core->id.rev == 2)
+		pr_err("Fix for 4329b0 bad LPOM state not implemented!\n");
+
+	bcma_pmu_pll_init(cc);
+	bcma_pmu_resources_init(cc);
+	bcma_pmu_swreg_init(cc);
+	bcma_pmu_workarounds(cc);
+}
diff --git a/drivers/bcma/driver_pci.c b/drivers/bcma/driver_pci.c
new file mode 100644
index 0000000..b98b835
--- /dev/null
+++ b/drivers/bcma/driver_pci.c
@@ -0,0 +1,163 @@
+/*
+ * Broadcom specific AMBA
+ * PCI Core
+ *
+ * Copyright 2005, Broadcom Corporation
+ * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+/**************************************************
+ * R/W ops.
+ **************************************************/
+
+static u32 bcma_pcie_read(struct bcma_drv_pci *pc, u32 address)
+{
+	pcicore_write32(pc, 0x130, address);
+	pcicore_read32(pc, 0x130);
+	return pcicore_read32(pc, 0x134);
+}
+
+#if 0
+static void bcma_pcie_write(struct bcma_drv_pci *pc, u32 address, u32 data)
+{
+	pcicore_write32(pc, 0x130, address);
+	pcicore_read32(pc, 0x130);
+	pcicore_write32(pc, 0x134, data);
+}
+#endif
+
+static void bcma_pcie_mdio_set_phy(struct bcma_drv_pci *pc, u8 phy)
+{
+	const u16 mdio_control = 0x128;
+	const u16 mdio_data = 0x12C;
+	u32 v;
+	int i;
+
+	v = (1 << 30); /* Start of Transaction */
+	v |= (1 << 28); /* Write Transaction */
+	v |= (1 << 17); /* Turnaround */
+	v |= (0x1F << 18);
+	v |= (phy << 4);
+	pcicore_write32(pc, mdio_data, v);
+
+	udelay(10);
+	for (i = 0; i < 200; i++) {
+		v = pcicore_read32(pc, mdio_control);
+		if (v & 0x100 /* Trans complete */)
+			break;
+		msleep(1);
+	}
+}
+
+static u16 bcma_pcie_mdio_read(struct bcma_drv_pci *pc, u8 device, u8 address)
+{
+	const u16 mdio_control = 0x128;
+	const u16 mdio_data = 0x12C;
+	int max_retries = 10;
+	u16 ret = 0;
+	u32 v;
+	int i;
+
+	v = 0x80; /* Enable Preamble Sequence */
+	v |= 0x2; /* MDIO Clock Divisor */
+	pcicore_write32(pc, mdio_control, v);
+
+	if (pc->core->id.rev >= 10) {
+		max_retries = 200;
+		bcma_pcie_mdio_set_phy(pc, device);
+	}
+
+	v = (1 << 30); /* Start of Transaction */
+	v |= (1 << 29); /* Read Transaction */
+	v |= (1 << 17); /* Turnaround */
+	if (pc->core->id.rev < 10)
+		v |= (u32)device << 22;
+	v |= (u32)address << 18;
+	pcicore_write32(pc, mdio_data, v);
+	/* Wait for the device to complete the transaction */
+	udelay(10);
+	for (i = 0; i < 200; i++) {
+		v = pcicore_read32(pc, mdio_control);
+		if (v & 0x100 /* Trans complete */) {
+			udelay(10);
+			ret = pcicore_read32(pc, mdio_data);
+			break;
+		}
+		msleep(1);
+	}
+	pcicore_write32(pc, mdio_control, 0);
+	return ret;
+}
+
+static void bcma_pcie_mdio_write(struct bcma_drv_pci *pc, u8 device,
+				u8 address, u16 data)
+{
+	const u16 mdio_control = 0x128;
+	const u16 mdio_data = 0x12C;
+	int max_retries = 10;
+	u32 v;
+	int i;
+
+	v = 0x80; /* Enable Preamble Sequence */
+	v |= 0x2; /* MDIO Clock Divisor */
+	pcicore_write32(pc, mdio_control, v);
+
+	if (pc->core->id.rev >= 10) {
+		max_retries = 200;
+		bcma_pcie_mdio_set_phy(pc, device);
+	}
+
+	v = (1 << 30); /* Start of Transaction */
+	v |= (1 << 28); /* Write Transaction */
+	v |= (1 << 17); /* Turnaround */
+	if (pc->core->id.rev < 10)
+		v |= (u32)device << 22;
+	v |= (u32)address << 18;
+	v |= data;
+	pcicore_write32(pc, mdio_data, v);
+	/* Wait for the device to complete the transaction */
+	udelay(10);
+	for (i = 0; i < max_retries; i++) {
+		v = pcicore_read32(pc, mdio_control);
+		if (v & 0x100 /* Trans complete */)
+			break;
+		msleep(1);
+	}
+	pcicore_write32(pc, mdio_control, 0);
+}
+
+/**************************************************
+ * Workarounds.
+ **************************************************/
+
+static u8 bcma_pcicore_polarity_workaround(struct bcma_drv_pci *pc)
+{
+	return (bcma_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80;
+}
+
+static void bcma_pcicore_serdes_workaround(struct bcma_drv_pci *pc)
+{
+	const u8 serdes_pll_device = 0x1D;
+	const u8 serdes_rx_device = 0x1F;
+	u16 tmp;
+
+	bcma_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */,
+			      bcma_pcicore_polarity_workaround(pc));
+	tmp = bcma_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */);
+	if (tmp & 0x4000)
+		bcma_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000);
+}
+
+/**************************************************
+ * Init.
+ **************************************************/
+
+void bcma_core_pci_init(struct bcma_drv_pci *pc)
+{
+	bcma_pcicore_serdes_workaround(pc);
+}
diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
new file mode 100644
index 0000000..99dd36e
--- /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);
+}
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
new file mode 100644
index 0000000..be52344
--- /dev/null
+++ b/drivers/bcma/main.c
@@ -0,0 +1,247 @@
+/*
+ * Broadcom specific AMBA
+ * Bus subsystem
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+MODULE_DESCRIPTION("Broadcom's specific AMBA driver");
+MODULE_LICENSE("GPL");
+
+static int bcma_bus_match(struct device *dev, struct device_driver *drv);
+static int bcma_device_probe(struct device *dev);
+static int bcma_device_remove(struct device *dev);
+
+static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	return sprintf(buf, "0x%03X\n", core->id.manuf);
+}
+static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	return sprintf(buf, "0x%03X\n", core->id.id);
+}
+static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	return sprintf(buf, "0x%02X\n", core->id.rev);
+}
+static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	return sprintf(buf, "0x%X\n", core->id.class);
+}
+static struct device_attribute bcma_device_attrs[] = {
+	__ATTR_RO(manuf),
+	__ATTR_RO(id),
+	__ATTR_RO(rev),
+	__ATTR_RO(class),
+	__ATTR_NULL,
+};
+
+static struct bus_type bcma_bus_type = {
+	.name		= "bcma",
+	.match		= bcma_bus_match,
+	.probe		= bcma_device_probe,
+	.remove		= bcma_device_remove,
+	.dev_attrs	= bcma_device_attrs,
+};
+
+static struct bcma_device *bcma_find_core(struct bcma_bus *bus, u16 coreid)
+{
+	struct bcma_device *core;
+
+	list_for_each_entry(core, &bus->cores, list) {
+		if (core->id.id == coreid)
+			return core;
+	}
+	return NULL;
+}
+
+static void bcma_release_core_dev(struct device *dev)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	kfree(core);
+}
+
+static int bcma_register_cores(struct bcma_bus *bus)
+{
+	struct bcma_device *core;
+	int err, dev_id = 0;
+
+	list_for_each_entry(core, &bus->cores, list) {
+		/* We support that cores ourself */
+		switch (core->id.id) {
+		case BCMA_CORE_CHIPCOMMON:
+		case BCMA_CORE_PCI:
+		case BCMA_CORE_PCIE:
+			continue;
+		}
+
+		core->dev.release = bcma_release_core_dev;
+		core->dev.bus = &bcma_bus_type;
+		dev_set_name(&core->dev, "bcma%d:%d", 0/*bus->num*/, dev_id);
+
+		switch (bus->hosttype) {
+		case BCMA_HOSTTYPE_PCI:
+			core->dev.parent = &bus->host_pci->dev;
+			break;
+		case BCMA_HOSTTYPE_NONE:
+		case BCMA_HOSTTYPE_SDIO:
+			break;
+		}
+
+		err = device_register(&core->dev);
+		if (err) {
+			pr_err("Could not register dev for core 0x%03X\n",
+			       core->id.id);
+			continue;
+		}
+		core->dev_registered = true;
+		dev_id++;
+	}
+
+	return 0;
+}
+
+static void bcma_unregister_cores(struct bcma_bus *bus)
+{
+	struct bcma_device *core;
+
+	list_for_each_entry(core, &bus->cores, list) {
+		if (core->dev_registered)
+			device_unregister(&core->dev);
+	}
+}
+
+int bcma_bus_register(struct bcma_bus *bus)
+{
+	int err;
+	struct bcma_device *core;
+
+	/* Scan for devices (cores) */
+	err = bcma_bus_scan(bus);
+	if (err) {
+		pr_err("Failed to scan: %d\n", err);
+		return -1;
+	}
+
+	/* Init CC core */
+	core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
+	if (core) {
+		bus->drv_cc.core = core;
+		bcma_core_chipcommon_init(&bus->drv_cc);
+	}
+
+	/* Init PCIE core */
+	core = bcma_find_core(bus, BCMA_CORE_PCIE);
+	if (core) {
+		bus->drv_pci.core = core;
+		bcma_core_pci_init(&bus->drv_pci);
+	}
+
+	/* Register found cores */
+	bcma_register_cores(bus);
+
+	pr_info("Bus registered\n");
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(bcma_bus_register);
+
+void bcma_bus_unregister(struct bcma_bus *bus)
+{
+	bcma_unregister_cores(bus);
+}
+EXPORT_SYMBOL_GPL(bcma_bus_unregister);
+
+int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
+{
+	drv->drv.name = drv->name;
+	drv->drv.bus = &bcma_bus_type;
+	drv->drv.owner = owner;
+
+	return driver_register(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(__bcma_driver_register);
+
+void bcma_driver_unregister(struct bcma_driver *drv)
+{
+	driver_unregister(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(bcma_driver_unregister);
+
+static int bcma_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	struct bcma_driver *adrv = container_of(drv, struct bcma_driver, drv);
+	const struct bcma_device_id *cid = &core->id;
+	const struct bcma_device_id *did;
+
+	for (did = adrv->id_table; did->manuf || did->id || did->rev; did++) {
+	    if ((did->manuf == cid->manuf || did->manuf == BCMA_ANY_MANUF) &&
+		(did->id == cid->id || did->id == BCMA_ANY_ID) &&
+		(did->rev == cid->rev || did->rev == BCMA_ANY_REV) &&
+		(did->class == cid->class || did->class == BCMA_ANY_CLASS))
+			return 1;
+	}
+	return 0;
+}
+
+static int bcma_device_probe(struct device *dev)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
+					       drv);
+	int err = 0;
+
+	if (adrv->probe)
+		err = adrv->probe(core);
+
+	return err;
+}
+
+static int bcma_device_remove(struct device *dev)
+{
+	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
+	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
+					       drv);
+
+	if (adrv->remove)
+		adrv->remove(core);
+
+	return 0;
+}
+
+static int __init bcma_modinit(void)
+{
+	int err;
+
+	err = bus_register(&bcma_bus_type);
+	if (err)
+		return err;
+
+#ifdef CONFIG_BCMA_HOST_PCI
+	err = bcma_host_pci_init();
+	if (err) {
+		pr_err("PCI host initialization failed\n");
+		err = 0;
+	}
+#endif
+
+	return err;
+}
+fs_initcall(bcma_modinit);
+
+static void __exit bcma_modexit(void)
+{
+#ifdef CONFIG_BCMA_HOST_PCI
+	bcma_host_pci_exit();
+#endif
+	bus_unregister(&bcma_bus_type);
+}
+module_exit(bcma_modexit)
diff --git a/drivers/bcma/scan.c b/drivers/bcma/scan.c
new file mode 100644
index 0000000..40d7dcc
--- /dev/null
+++ b/drivers/bcma/scan.c
@@ -0,0 +1,360 @@
+/*
+ * Broadcom specific AMBA
+ * Bus scanning
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "scan.h"
+#include "bcma_private.h"
+
+#include <linux/bcma/bcma.h>
+#include <linux/bcma/bcma_regs.h>
+#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+
+struct bcma_device_id_name {
+	u16 id;
+	const char *name;
+};
+struct bcma_device_id_name bcma_device_names[] = {
+	{ BCMA_CORE_OOB_ROUTER, "OOB Router" },
+	{ BCMA_CORE_INVALID, "Invalid" },
+	{ BCMA_CORE_CHIPCOMMON, "ChipCommon" },
+	{ BCMA_CORE_ILINE20, "ILine 20" },
+	{ BCMA_CORE_SRAM, "SRAM" },
+	{ BCMA_CORE_SDRAM, "SDRAM" },
+	{ BCMA_CORE_PCI, "PCI" },
+	{ BCMA_CORE_MIPS, "MIPS" },
+	{ BCMA_CORE_ETHERNET, "Fast Ethernet" },
+	{ BCMA_CORE_V90, "V90" },
+	{ BCMA_CORE_USB11_HOSTDEV, "USB 1.1 Hostdev" },
+	{ BCMA_CORE_ADSL, "ADSL" },
+	{ BCMA_CORE_ILINE100, "ILine 100" },
+	{ BCMA_CORE_IPSEC, "IPSEC" },
+	{ BCMA_CORE_UTOPIA, "UTOPIA" },
+	{ BCMA_CORE_PCMCIA, "PCMCIA" },
+	{ BCMA_CORE_INTERNAL_MEM, "Internal Memory" },
+	{ BCMA_CORE_MEMC_SDRAM, "MEMC SDRAM" },
+	{ BCMA_CORE_OFDM, "OFDM" },
+	{ BCMA_CORE_EXTIF, "EXTIF" },
+	{ BCMA_CORE_80211, "IEEE 802.11" },
+	{ BCMA_CORE_PHY_A, "PHY A" },
+	{ BCMA_CORE_PHY_B, "PHY B" },
+	{ BCMA_CORE_PHY_G, "PHY G" },
+	{ BCMA_CORE_MIPS_3302, "MIPS 3302" },
+	{ BCMA_CORE_USB11_HOST, "USB 1.1 Host" },
+	{ BCMA_CORE_USB11_DEV, "USB 1.1 Device" },
+	{ BCMA_CORE_USB20_HOST, "USB 2.0 Host" },
+	{ BCMA_CORE_USB20_DEV, "USB 2.0 Device" },
+	{ BCMA_CORE_SDIO_HOST, "SDIO Host" },
+	{ BCMA_CORE_ROBOSWITCH, "Roboswitch" },
+	{ BCMA_CORE_PARA_ATA, "PATA" },
+	{ BCMA_CORE_SATA_XORDMA, "SATA XOR-DMA" },
+	{ BCMA_CORE_ETHERNET_GBIT, "GBit Ethernet" },
+	{ BCMA_CORE_PCIE, "PCIe" },
+	{ BCMA_CORE_PHY_N, "PHY N" },
+	{ BCMA_CORE_SRAM_CTL, "SRAM Controller" },
+	{ BCMA_CORE_MINI_MACPHY, "Mini MACPHY" },
+	{ BCMA_CORE_ARM_1176, "ARM 1176" },
+	{ BCMA_CORE_ARM_7TDMI, "ARM 7TDMI" },
+	{ BCMA_CORE_PHY_LP, "PHY LP" },
+	{ BCMA_CORE_PMU, "PMU" },
+	{ BCMA_CORE_PHY_SSN, "PHY SSN" },
+	{ BCMA_CORE_SDIO_DEV, "SDIO Device" },
+	{ BCMA_CORE_ARM_CM3, "ARM CM3" },
+	{ BCMA_CORE_PHY_HT, "PHY HT" },
+	{ BCMA_CORE_MIPS_74K, "MIPS 74K" },
+	{ BCMA_CORE_MAC_GBIT, "GBit MAC" },
+	{ BCMA_CORE_DDR12_MEM_CTL, "DDR1/DDR2 Memory Controller" },
+	{ BCMA_CORE_PCIE_RC, "PCIe Root Complex" },
+	{ BCMA_CORE_OCP_OCP_BRIDGE, "OCP to OCP Bridge" },
+	{ BCMA_CORE_SHARED_COMMON, "Common Shared" },
+	{ BCMA_CORE_OCP_AHB_BRIDGE, "OCP to AHB Bridge" },
+	{ BCMA_CORE_SPI_HOST, "SPI Host" },
+	{ BCMA_CORE_I2S, "I2S" },
+	{ BCMA_CORE_SDR_DDR1_MEM_CTL, "SDR/DDR1 Memory Controller" },
+	{ BCMA_CORE_SHIM, "SHIM" },
+	{ BCMA_CORE_DEFAULT, "Default" },
+};
+const char *bcma_device_name(struct bcma_device_id *id)
+{
+	int i;
+
+	if (id->manuf == BCMA_MANUF_BCM) {
+		for (i = 0; i < ARRAY_SIZE(bcma_device_names); i++) {
+			if (bcma_device_names[i].id == id->id)
+				return bcma_device_names[i].name;
+		}
+	}
+	return "UNKNOWN";
+}
+
+static u32 bcma_scan_read32(struct bcma_bus *bus, u8 current_coreidx,
+		       u16 offset)
+{
+	return readl(bus->mmio + offset);
+}
+
+static void bcma_scan_switch_core(struct bcma_bus *bus, u32 addr)
+{
+	if (bus->hosttype == BCMA_HOSTTYPE_PCI)
+		pci_write_config_dword(bus->host_pci, BCMA_PCI_BAR0_WIN,
+				       addr);
+}
+
+static u32 bcma_erom_get_ent(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent = readl(*eromptr);
+	(*eromptr)++;
+	return ent;
+}
+
+static void bcma_erom_push_ent(u32 **eromptr)
+{
+	(*eromptr)--;
+}
+
+static s32 bcma_erom_get_ci(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent = bcma_erom_get_ent(bus, eromptr);
+	if (!(ent & SCAN_ER_VALID))
+		return -ENOENT;
+	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_CI)
+		return -ENOENT;
+	return ent;
+}
+
+static bool bcma_erom_is_end(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent = bcma_erom_get_ent(bus, eromptr);
+	bcma_erom_push_ent(eromptr);
+	return (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID));
+}
+
+static bool bcma_erom_is_bridge(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent = bcma_erom_get_ent(bus, eromptr);
+	bcma_erom_push_ent(eromptr);
+	return (((ent & SCAN_ER_VALID)) &&
+		((ent & SCAN_ER_TAGX) == SCAN_ER_TAG_ADDR) &&
+		((ent & SCAN_ADDR_TYPE) == SCAN_ADDR_TYPE_BRIDGE));
+}
+
+static void bcma_erom_skip_component(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent;
+	while (1) {
+		ent = bcma_erom_get_ent(bus, eromptr);
+		if ((ent & SCAN_ER_VALID) &&
+		    ((ent & SCAN_ER_TAG) == SCAN_ER_TAG_CI))
+			break;
+		if (ent == (SCAN_ER_TAG_END | SCAN_ER_VALID))
+			break;
+	}
+	bcma_erom_push_ent(eromptr);
+}
+
+static s32 bcma_erom_get_mst_port(struct bcma_bus *bus, u32 **eromptr)
+{
+	u32 ent = bcma_erom_get_ent(bus, eromptr);
+	if (!(ent & SCAN_ER_VALID))
+		return -ENOENT;
+	if ((ent & SCAN_ER_TAG) != SCAN_ER_TAG_MP)
+		return -ENOENT;
+	return ent;
+}
+
+static s32 bcma_erom_get_addr_desc(struct bcma_bus *bus, u32 **eromptr,
+				  u32 type, u8 port)
+{
+	u32 addrl, addrh, sizel, sizeh = 0;
+	u32 size;
+
+	u32 ent = bcma_erom_get_ent(bus, eromptr);
+	if ((!(ent & SCAN_ER_VALID)) ||
+	    ((ent & SCAN_ER_TAGX) != SCAN_ER_TAG_ADDR) ||
+	    ((ent & SCAN_ADDR_TYPE) != type) ||
+	    (((ent & SCAN_ADDR_PORT) >> SCAN_ADDR_PORT_SHIFT) != port)) {
+		bcma_erom_push_ent(eromptr);
+		return -EINVAL;
+	}
+
+	addrl = ent & SCAN_ADDR_ADDR;
+	if (ent & SCAN_ADDR_AG32)
+		addrh = bcma_erom_get_ent(bus, eromptr);
+	else
+		addrh = 0;
+
+	if ((ent & SCAN_ADDR_SZ) == SCAN_ADDR_SZ_SZD) {
+		size = bcma_erom_get_ent(bus, eromptr);
+		sizel = size & SCAN_SIZE_SZ;
+		if (size & SCAN_SIZE_SG32)
+			sizeh = bcma_erom_get_ent(bus, eromptr);
+	} else
+		sizel = SCAN_ADDR_SZ_BASE <<
+				((ent & SCAN_ADDR_SZ) >> SCAN_ADDR_SZ_SHIFT);
+
+	return addrl;
+}
+
+int bcma_bus_scan(struct bcma_bus *bus)
+{
+	u32 erombase;
+	u32 __iomem *eromptr, *eromend;
+
+	s32 cia, cib;
+	u8 ports[2], wrappers[2];
+
+	s32 tmp;
+	u8 i, j;
+
+	int err;
+
+	INIT_LIST_HEAD(&bus->cores);
+	bus->nr_cores = 0;
+
+	bcma_scan_switch_core(bus, BCMA_ADDR_BASE);
+
+	tmp = bcma_scan_read32(bus, 0, BCMA_CC_ID);
+	bus->chipinfo.id = (tmp & BCMA_CC_ID_ID) >> BCMA_CC_ID_ID_SHIFT;
+	bus->chipinfo.rev = (tmp & BCMA_CC_ID_REV) >> BCMA_CC_ID_REV_SHIFT;
+	bus->chipinfo.pkg = (tmp & BCMA_CC_ID_PKG) >> BCMA_CC_ID_PKG_SHIFT;
+
+	erombase = bcma_scan_read32(bus, 0, BCMA_CC_EROM);
+	eromptr = bus->mmio;
+	eromend = eromptr + BCMA_CORE_SIZE / sizeof(u32);
+
+	bcma_scan_switch_core(bus, erombase);
+
+	while (eromptr < eromend) {
+		struct bcma_device *core = kzalloc(sizeof(*core), GFP_KERNEL);
+		if (!core)
+			return -ENOMEM;
+		INIT_LIST_HEAD(&core->list);
+		core->bus = bus;
+
+		/* get CIs */
+		cia = bcma_erom_get_ci(bus, &eromptr);
+		if (cia < 0) {
+			bcma_erom_push_ent(&eromptr);
+			if (bcma_erom_is_end(bus, &eromptr))
+				break;
+			err= -EILSEQ;
+			goto out;
+		}
+		cib = bcma_erom_get_ci(bus, &eromptr);
+		if (cib < 0) {
+			err= -EILSEQ;
+			goto out;
+		}
+
+		/* parse CIs */
+		core->id.class = (cia & SCAN_CIA_CLASS) >> SCAN_CIA_CLASS_SHIFT;
+		core->id.id = (cia & SCAN_CIA_ID) >> SCAN_CIA_ID_SHIFT;
+		core->id.manuf = (cia & SCAN_CIA_MANUF) >> SCAN_CIA_MANUF_SHIFT;
+		ports[0] = (cib & SCAN_CIB_NMP) >> SCAN_CIB_NMP_SHIFT;
+		ports[1] = (cib & SCAN_CIB_NSP) >> SCAN_CIB_NSP_SHIFT;
+		wrappers[0] = (cib & SCAN_CIB_NMW) >> SCAN_CIB_NMW_SHIFT;
+		wrappers[1] = (cib & SCAN_CIB_NSW) >> SCAN_CIB_NSW_SHIFT;
+		core->id.rev = (cib & SCAN_CIB_REV) >> SCAN_CIB_REV_SHIFT;
+
+		if (((core->id.manuf == BCMA_MANUF_ARM) &&
+		     (core->id.id == 0xFFF)) ||
+		    (ports[1] == 0)) {
+			bcma_erom_skip_component(bus, &eromptr);
+			continue;
+		}
+
+		/* check if component is a core at all */
+		if (wrappers[0] + wrappers[1] == 0) {
+			/* we could save addrl of the router
+			if (cid == BCMA_CORE_OOB_ROUTER)
+			 */
+			bcma_erom_skip_component(bus, &eromptr);
+			continue;
+		}
+
+		if (bcma_erom_is_bridge(bus, &eromptr)) {
+			bcma_erom_skip_component(bus, &eromptr);
+			continue;
+		}
+
+		/* get & parse master ports */
+		for (i = 0; i < ports[0]; i++) {
+			u32 mst_port_d = bcma_erom_get_mst_port(bus, &eromptr);
+			if (mst_port_d < 0) {
+				err= -EILSEQ;
+				goto out;
+			}
+		}
+
+		/* get & parse slave ports */
+		for (i = 0; i < ports[1]; i++) {
+			for (j = 0; ; j++) {
+				tmp = bcma_erom_get_addr_desc(bus, &eromptr,
+					SCAN_ADDR_TYPE_SLAVE, i);
+				if (tmp < 0) {
+					/* no more entries for port _i_ */
+					/* pr_debug("erom: slave port %d "
+					 * "has %d descriptors\n", i, j); */
+					break;
+				} else {
+					if (i == 0 && j == 0)
+						core->addr = tmp;
+				}
+			}
+		}
+
+		/* get & parse master wrappers */
+		for (i = 0; i < wrappers[0]; i++) {
+			for (j = 0; ; j++) {
+				tmp = bcma_erom_get_addr_desc(bus, &eromptr,
+					SCAN_ADDR_TYPE_MWRAP, i);
+				if (tmp < 0) {
+					/* no more entries for port _i_ */
+					/* pr_debug("erom: master wrapper %d "
+					 * "has %d descriptors\n", i, j); */
+					break;
+				} else {
+					if (i == 0 && j == 0)
+						core->wrap = tmp;
+				}
+			}
+		}
+
+		/* get & parse slave wrappers */
+		for (i = 0; i < wrappers[1]; i++) {
+			u8 hack = (ports[1] == 1) ? 0 : 1;
+			for (j = 0; ; j++) {
+				tmp = bcma_erom_get_addr_desc(bus, &eromptr,
+					SCAN_ADDR_TYPE_SWRAP, i + hack);
+				if (tmp < 0) {
+					/* no more entries for port _i_ */
+					/* pr_debug("erom: master wrapper %d "
+					 * has %d descriptors\n", i, j); */
+					break;
+				} else {
+					if (wrappers[0] == 0 && !i && !j)
+						core->wrap = tmp;
+				}
+			}
+		}
+
+		pr_info("Core %d found: %s "
+			"(manuf 0x%03X, id 0x%03X, rev 0x%02X, class 0x%X)\n",
+			bus->nr_cores, bcma_device_name(&core->id),
+			core->id.manuf, core->id.id, core->id.rev,
+			core->id.class);
+
+		core->core_index = bus->nr_cores++;
+		list_add(&core->list, &bus->cores);
+		continue;
+out:
+		return err;
+	}
+
+	return 0;
+}
diff --git a/drivers/bcma/scan.h b/drivers/bcma/scan.h
new file mode 100644
index 0000000..113e6a6
--- /dev/null
+++ b/drivers/bcma/scan.h
@@ -0,0 +1,56 @@
+#ifndef BCMA_SCAN_H_
+#define BCMA_SCAN_H_
+
+#define BCMA_ADDR_BASE		0x18000000
+#define BCMA_WRAP_BASE		0x18100000
+
+#define SCAN_ER_VALID		0x00000001
+#define SCAN_ER_TAGX		0x00000006 /* we have to ignore 0x8 bit when checking tag for SCAN_ER_TAG_ADDR */
+#define SCAN_ER_TAG		0x0000000E
+#define  SCAN_ER_TAG_CI		0x00000000
+#define  SCAN_ER_TAG_MP		0x00000002
+#define  SCAN_ER_TAG_ADDR	0x00000004
+#define  SCAN_ER_TAG_END	0x0000000E
+#define SCAN_ER_BAD		0xFFFFFFFF
+
+#define SCAN_CIA_CLASS		0x000000F0
+#define SCAN_CIA_CLASS_SHIFT	4
+#define SCAN_CIA_ID		0x000FFF00
+#define SCAN_CIA_ID_SHIFT	8
+#define SCAN_CIA_MANUF		0xFFF00000
+#define SCAN_CIA_MANUF_SHIFT	20
+
+#define SCAN_CIB_NMP		0x000001F0
+#define SCAN_CIB_NMP_SHIFT	4
+#define SCAN_CIB_NSP		0x00003E00
+#define SCAN_CIB_NSP_SHIFT	9
+#define SCAN_CIB_NMW		0x0007C000
+#define SCAN_CIB_NMW_SHIFT	14
+#define SCAN_CIB_NSW		0x00F80000
+#define SCAN_CIB_NSW_SHIFT	17
+#define SCAN_CIB_REV		0xFF000000
+#define SCAN_CIB_REV_SHIFT	24
+
+#define SCAN_ADDR_AG32		0x00000008
+#define SCAN_ADDR_SZ		0x00000030
+#define SCAN_ADDR_SZ_SHIFT	4
+#define  SCAN_ADDR_SZ_4K	0x00000000
+#define  SCAN_ADDR_SZ_8K	0x00000010
+#define  SCAN_ADDR_SZ_16K	0x00000020
+#define  SCAN_ADDR_SZ_SZD	0x00000030
+#define SCAN_ADDR_TYPE		0x000000C0
+#define  SCAN_ADDR_TYPE_SLAVE	0x00000000
+#define  SCAN_ADDR_TYPE_BRIDGE	0x00000040
+#define  SCAN_ADDR_TYPE_SWRAP	0x00000080
+#define  SCAN_ADDR_TYPE_MWRAP	0x000000C0
+#define SCAN_ADDR_PORT		0x00000F00
+#define SCAN_ADDR_PORT_SHIFT	8
+#define SCAN_ADDR_ADDR		0xFFFFF000
+
+#define SCAN_ADDR_SZ_BASE	0x00001000	/* 4KB */
+
+#define SCAN_SIZE_SZ_ALIGN	0x00000FFF
+#define SCAN_SIZE_SZ		0xFFFFF000
+#define SCAN_SIZE_SG32		0x00000008
+
+#endif /* BCMA_SCAN_H_ */