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>

1 files changed, 56 insertions, 0 deletions

diff --git a/drivers/bcma/scan.h b/drivers/bcma/scan.h
new file mode 100644
index 000000000000..113e6a66884c
--- /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_ */