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From f93062e72447b4a4a51afbe33ea086ce8c922587 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 19 Jun 2011 17:52:09 +0200
Subject: [PATCH 08/14] bcma: add pci(e) host mode
This adds some stub for a pci(e) host controller. This controller is
found on some embedded devices to attach other chips.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
drivers/bcma/Kconfig | 6 ++++
drivers/bcma/Makefile | 1 +
drivers/bcma/bcma_private.h | 6 ++++
drivers/bcma/driver_pci.c | 14 ++++++++++-
drivers/bcma/driver_pci_host.c | 43 ++++++++++++++++++++++++++++++++++
include/linux/bcma/bcma_driver_pci.h | 1 +
6 files changed, 70 insertions(+), 1 deletions(-)
create mode 100644 drivers/bcma/driver_pci_host.c
--- a/drivers/bcma/Kconfig
+++ b/drivers/bcma/Kconfig
@@ -32,6 +32,12 @@ config BCMA_HOST_SOC
depends on BCMA_DRIVER_MIPS
default n
+config BCMA_DRIVER_PCI_HOSTMODE
+ bool "Hostmode support for BCMA PCI core"
+ depends on BCMA_DRIVER_MIPS
+ help
+ PCIcore hostmode operation (external PCI bus).
+
config BCMA_DRIVER_MIPS
bool "BCMA Broadcom MIPS core driver"
depends on BCMA && MIPS
--- a/drivers/bcma/Makefile
+++ b/drivers/bcma/Makefile
@@ -1,6 +1,7 @@
bcma-y += main.o scan.o core.o sprom.o
bcma-y += driver_chipcommon.o driver_chipcommon_pmu.o
bcma-y += driver_pci.o
+bcma-$(CONFIG_BCMA_DRIVER_PCI_HOSTMODE) += driver_pci_host.o
bcma-$(CONFIG_BCMA_DRIVER_MIPS) += driver_mips.o
bcma-$(CONFIG_BCMA_HOST_PCI) += host_pci.o
bcma-$(CONFIG_BCMA_HOST_SOC) += host_soc.o
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -38,6 +38,12 @@ extern int bcma_chipco_serial_init(struc
struct bcma_drv_mips_serial_port *ports);
#endif /* CONFIG_BCMA_DRIVER_MIPS */
+#ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
+/* driver_pci_host.c */
+int bcma_core_pci_in_hostmode(struct bcma_drv_pci *pc);
+void bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc);
+#endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
+
#ifdef CONFIG_BCMA_HOST_PCI
/* host_pci.c */
extern int __init bcma_host_pci_init(void);
--- a/drivers/bcma/driver_pci.c
+++ b/drivers/bcma/driver_pci.c
@@ -159,9 +159,21 @@ static void bcma_pcicore_serdes_workarou
void bcma_core_pci_init(struct bcma_drv_pci *pc)
{
+ struct bcma_device *core = pc->core;
+
if (pc->setup_done)
return;
- bcma_pcicore_serdes_workaround(pc);
+
+ if (!bcma_core_is_enabled(core))
+ bcma_core_enable(core, 0);
+#ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
+ pc->hostmode = bcma_core_pci_in_hostmode(pc);
+ if (pc->hostmode)
+ bcma_core_pci_hostmode_init(pc);
+#endif /* CONFIG_BCMA_DRIVER_PCI_HOSTMODE */
+ if (!pc->hostmode)
+ bcma_pcicore_serdes_workaround(pc);
+
pc->setup_done = true;
}
--- /dev/null
+++ b/drivers/bcma/driver_pci_host.c
@@ -0,0 +1,43 @@
+/*
+ * Broadcom specific AMBA
+ * PCI Host mode
+ *
+ * Copyright 2005, Broadcom Corporation
+ *
+ * Licensed under the GNU/GPL. See COPYING for details.
+ */
+
+#include "bcma_private.h"
+#include <linux/bcma/bcma.h>
+
+#include <asm/paccess.h>
+/* Probe a 32bit value on the bus and catch bus exceptions.
+ * Returns nonzero on a bus exception.
+ * This is MIPS specific */
+#define mips_busprobe32(val, addr) get_dbe((val), ((u32 *)(addr)))
+
+
+void bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc)
+{
+ /* TODO: implement PCI host mode */
+}
+
+int bcma_core_pci_in_hostmode(struct bcma_drv_pci *pc)
+{
+ struct bcma_bus *bus = pc->core->bus;
+ u16 chipid_top;
+ u32 tmp;
+
+ chipid_top = (bus->chipinfo.id & 0xFF00);
+ if (chipid_top != 0x4700 &&
+ chipid_top != 0x5300)
+ return 0;
+
+/* TODO: add when sprom is available
+ * if (bus->sprom.boardflags_lo & SSB_PCICORE_BFL_NOPCI)
+ * return 0;
+ */
+
+ return !mips_busprobe32(tmp, (bus->mmio + (pc->core->core_index *
+ BCMA_CORE_SIZE)));
+}
--- a/include/linux/bcma/bcma_driver_pci.h
+++ b/include/linux/bcma/bcma_driver_pci.h
@@ -78,6 +78,7 @@ struct pci_dev;
struct bcma_drv_pci {
struct bcma_device *core;
u8 setup_done:1;
+ u8 hostmode:1;
};
/* Register access */
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