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178 lines
5.5 KiB
Diff
178 lines
5.5 KiB
Diff
From 4785ffbdc9b52e308e43b9e2dcc1dca44f056d76 Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Tue, 12 May 2015 23:23:01 +0200
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Subject: [PATCH 2/2] PCI: iproc: Add BCMA PCIe driver
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This driver adds support for the PCIe 2.0 controller found on the BCMA bus.
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This controller can be found on (mostly) all Broadcom BCM470X / BCM5301X
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ARM SoCs.
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The driver found in the Broadcom SDK does some more stuff, like setting up
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some DMA memory areas, chaining MPS and MRRS to 512 and also some PHY
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changes like "improving" the PCIe jitter and doing some special
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initialization for the 3rd PCIe port.
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This was tested on a bcm4708 board with 2 PCIe ports and wireless cards
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connected to them.
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PCI_DOMAINS is needed by this driver, because normally there is more than
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one PCIe controller and without PCI_DOMAINS only the first controller gets
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registered. This controller gets 6 IRQs; the last one is trigged by all
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IRQ events.
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[bhelgaas: fix "GPLv2" MODULE_LICENSE typo]
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Acked-by: Rafał Miłecki <zajec5@gmail.com>
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Acked-by: Ray Jui <rjui@broadcom.com.com>
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---
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drivers/pci/host/Kconfig | 11 ++++
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drivers/pci/host/Makefile | 1 +
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drivers/pci/host/pcie-iproc-bcma.c | 112 +++++++++++++++++++++++++++++++++++++
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3 files changed, 124 insertions(+)
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create mode 100644 drivers/pci/host/pcie-iproc-bcma.c
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--- a/drivers/pci/host/Kconfig
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+++ b/drivers/pci/host/Kconfig
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@@ -125,4 +125,15 @@ config PCIE_IPROC_PLATFORM
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Say Y here if you want to use the Broadcom iProc PCIe controller
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through the generic platform bus interface
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+config PCIE_IPROC_BCMA
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+ bool "Broadcom iProc PCIe BCMA bus driver"
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+ depends on ARCH_BCM_IPROC || (ARM && COMPILE_TEST)
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+ select PCIE_IPROC
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+ select BCMA
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+ select PCI_DOMAINS
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+ default ARCH_BCM_5301X
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+ help
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+ Say Y here if you want to use the Broadcom iProc PCIe controller
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+ through the BCMA bus interface
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+
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endmenu
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--- a/drivers/pci/host/Makefile
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+++ b/drivers/pci/host/Makefile
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@@ -15,3 +15,4 @@ obj-$(CONFIG_PCI_LAYERSCAPE) += pci-laye
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obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
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obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
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obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
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+obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
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--- /dev/null
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+++ b/drivers/pci/host/pcie-iproc-bcma.c
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@@ -0,0 +1,112 @@
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+/*
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+ * Copyright (C) 2015 Broadcom Corporation
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+ * Copyright (C) 2015 Hauke Mehrtens <hauke@hauke-m.de>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation version 2.
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+ *
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+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
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+ * kind, whether express or implied; without even the implied warranty
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+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/pci.h>
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+#include <linux/module.h>
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+#include <linux/slab.h>
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+#include <linux/phy/phy.h>
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+#include <linux/bcma/bcma.h>
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+#include <linux/ioport.h>
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+
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+#include "pcie-iproc.h"
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+
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+
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+/* NS: CLASS field is R/O, and set to wrong 0x200 value */
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+static void bcma_pcie2_fixup_class(struct pci_dev *dev)
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+{
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+ dev->class = PCI_CLASS_BRIDGE_PCI << 8;
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+}
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+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8011, bcma_pcie2_fixup_class);
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+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_BROADCOM, 0x8012, bcma_pcie2_fixup_class);
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+
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+static int iproc_pcie_bcma_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
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+{
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+ struct pci_sys_data *sys = dev->sysdata;
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+ struct iproc_pcie *pcie = sys->private_data;
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+ struct bcma_device *bdev = container_of(pcie->dev, struct bcma_device, dev);
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+
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+ return bcma_core_irq(bdev, 5);
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+}
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+
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+static int iproc_pcie_bcma_probe(struct bcma_device *bdev)
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+{
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+ struct iproc_pcie *pcie;
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+ LIST_HEAD(res);
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+ struct resource res_mem;
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+ int ret;
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+
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+ pcie = devm_kzalloc(&bdev->dev, sizeof(*pcie), GFP_KERNEL);
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+ if (!pcie)
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+ return -ENOMEM;
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+
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+ pcie->dev = &bdev->dev;
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+ bcma_set_drvdata(bdev, pcie);
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+
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+ pcie->base = bdev->io_addr;
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+
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+ res_mem.start = bdev->addr_s[0];
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+ res_mem.end = bdev->addr_s[0] + SZ_128M - 1;
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+ res_mem.name = "PCIe MEM space";
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+ res_mem.flags = IORESOURCE_MEM;
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+ pci_add_resource(&res, &res_mem);
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+
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+ pcie->resources = &res;
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+
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+ pcie->map_irq = iproc_pcie_bcma_map_irq;
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+
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+ ret = iproc_pcie_setup(pcie);
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+ if (ret) {
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+ dev_err(pcie->dev, "PCIe controller setup failed\n");
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static void iproc_pcie_bcma_remove(struct bcma_device *bdev)
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+{
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+ struct iproc_pcie *pcie = bcma_get_drvdata(bdev);
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+
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+ iproc_pcie_remove(pcie);
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+}
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+
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+static const struct bcma_device_id iproc_pcie_bcma_table[] = {
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+ BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_PCIEG2, BCMA_ANY_REV, BCMA_ANY_CLASS),
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+ {},
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+};
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+MODULE_DEVICE_TABLE(bcma, iproc_pcie_bcma_table);
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+
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+static struct bcma_driver iproc_pcie_bcma_driver = {
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+ .name = KBUILD_MODNAME,
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+ .id_table = iproc_pcie_bcma_table,
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+ .probe = iproc_pcie_bcma_probe,
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+ .remove = iproc_pcie_bcma_remove,
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+};
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+
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+static int __init iproc_pcie_bcma_init(void)
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+{
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+ return bcma_driver_register(&iproc_pcie_bcma_driver);
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+}
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+module_init(iproc_pcie_bcma_init);
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+
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+static void __exit iproc_pcie_bcma_exit(void)
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+{
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+ bcma_driver_unregister(&iproc_pcie_bcma_driver);
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+}
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+module_exit(iproc_pcie_bcma_exit);
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+
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+MODULE_AUTHOR("Hauke Mehrtens");
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+MODULE_DESCRIPTION("Broadcom iProc PCIe BCMA driver");
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+MODULE_LICENSE("GPL v2");
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