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>
diff --git a/include/linux/bcma/bcma_driver_pci.h b/include/linux/bcma/bcma_driver_pci.h
new file mode 100644
index 0000000..b7e191c
--- /dev/null
+++ b/include/linux/bcma/bcma_driver_pci.h
@@ -0,0 +1,89 @@
+#ifndef LINUX_BCMA_DRIVER_PCI_H_
+#define LINUX_BCMA_DRIVER_PCI_H_
+
+#include <linux/types.h>
+
+struct pci_dev;
+
+/** PCI core registers. **/
+#define BCMA_CORE_PCI_CTL 0x0000 /* PCI Control */
+#define BCMA_CORE_PCI_CTL_RST_OE 0x00000001 /* PCI_RESET Output Enable */
+#define BCMA_CORE_PCI_CTL_RST 0x00000002 /* PCI_RESET driven out to pin */
+#define BCMA_CORE_PCI_CTL_CLK_OE 0x00000004 /* Clock gate Output Enable */
+#define BCMA_CORE_PCI_CTL_CLK 0x00000008 /* Gate for clock driven out to pin */
+#define BCMA_CORE_PCI_ARBCTL 0x0010 /* PCI Arbiter Control */
+#define BCMA_CORE_PCI_ARBCTL_INTERN 0x00000001 /* Use internal arbiter */
+#define BCMA_CORE_PCI_ARBCTL_EXTERN 0x00000002 /* Use external arbiter */
+#define BCMA_CORE_PCI_ARBCTL_PARKID 0x00000006 /* Mask, selects which agent is parked on an idle bus */
+#define BCMA_CORE_PCI_ARBCTL_PARKID_LAST 0x00000000 /* Last requestor */
+#define BCMA_CORE_PCI_ARBCTL_PARKID_4710 0x00000002 /* 4710 */
+#define BCMA_CORE_PCI_ARBCTL_PARKID_EXT0 0x00000004 /* External requestor 0 */
+#define BCMA_CORE_PCI_ARBCTL_PARKID_EXT1 0x00000006 /* External requestor 1 */
+#define BCMA_CORE_PCI_ISTAT 0x0020 /* Interrupt status */
+#define BCMA_CORE_PCI_ISTAT_INTA 0x00000001 /* PCI INTA# */
+#define BCMA_CORE_PCI_ISTAT_INTB 0x00000002 /* PCI INTB# */
+#define BCMA_CORE_PCI_ISTAT_SERR 0x00000004 /* PCI SERR# (write to clear) */
+#define BCMA_CORE_PCI_ISTAT_PERR 0x00000008 /* PCI PERR# (write to clear) */
+#define BCMA_CORE_PCI_ISTAT_PME 0x00000010 /* PCI PME# */
+#define BCMA_CORE_PCI_IMASK 0x0024 /* Interrupt mask */
+#define BCMA_CORE_PCI_IMASK_INTA 0x00000001 /* PCI INTA# */
+#define BCMA_CORE_PCI_IMASK_INTB 0x00000002 /* PCI INTB# */
+#define BCMA_CORE_PCI_IMASK_SERR 0x00000004 /* PCI SERR# */
+#define BCMA_CORE_PCI_IMASK_PERR 0x00000008 /* PCI PERR# */
+#define BCMA_CORE_PCI_IMASK_PME 0x00000010 /* PCI PME# */
+#define BCMA_CORE_PCI_MBOX 0x0028 /* Backplane to PCI Mailbox */
+#define BCMA_CORE_PCI_MBOX_F0_0 0x00000100 /* PCI function 0, INT 0 */
+#define BCMA_CORE_PCI_MBOX_F0_1 0x00000200 /* PCI function 0, INT 1 */
+#define BCMA_CORE_PCI_MBOX_F1_0 0x00000400 /* PCI function 1, INT 0 */
+#define BCMA_CORE_PCI_MBOX_F1_1 0x00000800 /* PCI function 1, INT 1 */
+#define BCMA_CORE_PCI_MBOX_F2_0 0x00001000 /* PCI function 2, INT 0 */
+#define BCMA_CORE_PCI_MBOX_F2_1 0x00002000 /* PCI function 2, INT 1 */
+#define BCMA_CORE_PCI_MBOX_F3_0 0x00004000 /* PCI function 3, INT 0 */
+#define BCMA_CORE_PCI_MBOX_F3_1 0x00008000 /* PCI function 3, INT 1 */
+#define BCMA_CORE_PCI_BCAST_ADDR 0x0050 /* Backplane Broadcast Address */
+#define BCMA_CORE_PCI_BCAST_ADDR_MASK 0x000000FF
+#define BCMA_CORE_PCI_BCAST_DATA 0x0054 /* Backplane Broadcast Data */
+#define BCMA_CORE_PCI_GPIO_IN 0x0060 /* rev >= 2 only */
+#define BCMA_CORE_PCI_GPIO_OUT 0x0064 /* rev >= 2 only */
+#define BCMA_CORE_PCI_GPIO_ENABLE 0x0068 /* rev >= 2 only */
+#define BCMA_CORE_PCI_GPIO_CTL 0x006C /* rev >= 2 only */
+#define BCMA_CORE_PCI_SBTOPCI0 0x0100 /* Backplane to PCI translation 0 (sbtopci0) */
+#define BCMA_CORE_PCI_SBTOPCI0_MASK 0xFC000000
+#define BCMA_CORE_PCI_SBTOPCI1 0x0104 /* Backplane to PCI translation 1 (sbtopci1) */
+#define BCMA_CORE_PCI_SBTOPCI1_MASK 0xFC000000
+#define BCMA_CORE_PCI_SBTOPCI2 0x0108 /* Backplane to PCI translation 2 (sbtopci2) */
+#define BCMA_CORE_PCI_SBTOPCI2_MASK 0xC0000000
+#define BCMA_CORE_PCI_PCICFG0 0x0400 /* PCI config space 0 (rev >= 8) */
+#define BCMA_CORE_PCI_PCICFG1 0x0500 /* PCI config space 1 (rev >= 8) */
+#define BCMA_CORE_PCI_PCICFG2 0x0600 /* PCI config space 2 (rev >= 8) */
+#define BCMA_CORE_PCI_PCICFG3 0x0700 /* PCI config space 3 (rev >= 8) */
+#define BCMA_CORE_PCI_SPROM(wordoffset) (0x0800 + ((wordoffset) * 2)) /* SPROM shadow area (72 bytes) */
+
+/* SBtoPCIx */
+#define BCMA_CORE_PCI_SBTOPCI_MEM 0x00000000
+#define BCMA_CORE_PCI_SBTOPCI_IO 0x00000001
+#define BCMA_CORE_PCI_SBTOPCI_CFG0 0x00000002
+#define BCMA_CORE_PCI_SBTOPCI_CFG1 0x00000003
+#define BCMA_CORE_PCI_SBTOPCI_PREF 0x00000004 /* Prefetch enable */
+#define BCMA_CORE_PCI_SBTOPCI_BURST 0x00000008 /* Burst enable */
+#define BCMA_CORE_PCI_SBTOPCI_MRM 0x00000020 /* Memory Read Multiple */
+#define BCMA_CORE_PCI_SBTOPCI_RC 0x00000030 /* Read Command mask (rev >= 11) */
+#define BCMA_CORE_PCI_SBTOPCI_RC_READ 0x00000000 /* Memory read */
+#define BCMA_CORE_PCI_SBTOPCI_RC_READL 0x00000010 /* Memory read line */
+#define BCMA_CORE_PCI_SBTOPCI_RC_READM 0x00000020 /* Memory read multiple */
+
+/* PCIcore specific boardflags */
+#define BCMA_CORE_PCI_BFL_NOPCI 0x00000400 /* Board leaves PCI floating */
+
+struct bcma_drv_pci {
+ struct bcma_device *core;
+ u8 setup_done:1;
+};
+
+/* Register access */
+#define pcicore_read32(pc, offset) bcma_read32((pc)->core, offset)
+#define pcicore_write32(pc, offset, val) bcma_write32((pc)->core, offset, val)
+
+extern void bcma_core_pci_init(struct bcma_drv_pci *pc);
+
+#endif /* LINUX_BCMA_DRIVER_PCI_H_ */